JP2019194095A - Discharge container - Google Patents

Abstract

To be able to suppress the height of a foam discharger while eliminating the necessity for a distance for the stroke of operation members between a fitting member to a container body neck part and a nozzle head.SOLUTION: A fitting member 2 having an inward facing flange 6 protruding inwardly from the upper end of a fitting cylindrical part 4 fittable to the neck part of a container is provided. From this fitting member, a cylinder member 10 which has a large diameter air cylinder 12 and a small diameter liquid cylinder 14 is provided in a hanging manner. An operation member 20 which has on the lower half part thereof an air piston 30 inserted into the air cylinder 12 and a liquid piston 22 inserted into the liquid cylinder 14 and meanwhile has a nozzle head N on the upper half part thereof, and is energized upward, is provided. From the upper surface of the air piston 30, a cover cylindrical part 38 which goes through between the edge part of a flange hole 6a of the inward facing flange 6 and the outer peripheral surface of a stem S and covers the outer peripheral surface of the stem S rises.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a discharge container.

As this type of foam dispenser, a cylinder member having a large-diameter air cylinder and a small-diameter liquid cylinder is suspended from an attachment member that can be attached to the mouth and neck of the container body, and is inserted into the air cylinder. A cylinder member having an air piston and a liquid piston inserted into the liquid cylinder in the lower half, a nozzle head in the upper half, and an urging member biased upward. As the actuating member moves up and down, the liquid pumped from the liquid cylinder to the nozzle head side through the main flow path is combined with the air pumped from the air cylinder through the communication path to generate foam. After discharging from the nozzle head, outside air is introduced into the air cylinder, and the liquid in the container is sucked into the liquid cylinder (Patent Document). ).
The actuating member forms the nozzle head on an upper portion of a stem that rises from the inside of the cylinder member through a flange hole of an inward flange of the mounting member, and air is supplied between the inward flange and the stem. A passage for introduction into the chamber is formed. And in order to prevent foreign matter such as water and dirt adhering to the container when air is introduced into the passage, a standing peripheral wall covering the outer peripheral surface of the stem is projected upward from the inner peripheral portion of the inward flange. It was.

JP2015-227183A

In the foam dispenser of Patent Document 1, since the upright peripheral wall covering the outer peripheral surface of the stem is protruded upward from the inner periphery of the inward flange, the stroke of the operating member is set between the upper end of the upright peripheral wall and the lower end of the nozzle head. It was necessary to take the corresponding distance (pressing allowance). For this reason, the foam discharger becomes tall, which is against the demand for space saving.
In particular, if the upright peripheral wall also has a function of guiding the raising and lowering of the actuating member and the height of the upright peripheral wall is designed to be the same as the streak of the actuating member in order to guide the entire stroke of the raising and lowering, The height from the flange to the lower surface of the nozzle head is about twice the stroke of the actuating member, and the total length of the foam dispenser tends to be large.

The first object of the present invention is to eliminate the need for a distance corresponding to the stroke of the operating member between the attachment member to the neck portion of the container body and the nozzle head, and to suppress the height of the foam discharger. That is.
The second object of the present invention is to provide a foam dispenser that can appropriately suppress the entry of foreign matter such as water from the gap between the actuating member and the mounting member.

The first means includes a mounting member 2 formed by projecting an inward flange 6 inwardly from an upper portion of the mounting cylinder portion 4 that can be mounted on the mouth and neck of the container body,
A cylinder member 10 in which a small-diameter liquid cylinder 14 is suspended from a large-diameter air cylinder 12 attached to the mounting member 2;
The stem S protrudes upward from the liquid piston 22 that can move up and down in the liquid cylinder 14, and the air piston 30 that is in sliding contact with the air cylinder 12 can be moved up and down relative to the outside of the stem S. An actuating member 20 that is linked and has a nozzle head N formed above the stem S and that is biased upward;
And the liquid pumped from the liquid cylinder 14 through the second liquid check valve VL2 and the air cylinder 12 through the second air check valve VA2 by raising and lowering the actuating member 20. The compressed air is mixed, foamed and discharged from the discharge port 54, and the liquid is sucked into the liquid cylinder 14 from the container body side via the first liquid check valve VL1, and the first air reverse In the foam dispenser provided to be able to introduce outside air into the air cylinder 12 via the stop valve VA1,
From the upper surface of the piston 30 for air, the cover cylinder part 38 which stood between the edge part of the flange hole 6a of the inward flange 6 and the outer peripheral surface of the stem S was covered.

  As shown in FIG. 1, the means erects a cover cylinder portion 38 that covers the outer peripheral surface of the stem S of the operating member 20 from the air piston 30 fitted to the inner peripheral surface of the air cylinder 12. . This cover cylinder portion 38 is erected between the stem S of the operating member 20 and the edge of the flange hole 6a of the inward flange 6 of the mounting member 2, and is fitted to at least the inner peripheral surface of the air cylinder 12. It is worn. In the prior art, as in Patent Document 1, the standing peripheral wall that guides the stem is projected upward from the inner periphery of the inward flange, but in this case, when the nozzle head is pushed down, it hits the upper end of the standing peripheral wall. Since it cannot be pushed down any more, as described above, there is a design restriction that it is necessary to provide a pushing allowance corresponding to the stroke of the operating member between the lower end of the nozzle head and the upper end of the upright peripheral wall. The dispenser becomes tall. Since the cover cylinder portion 38 of the present invention descends following the stem S of the actuating member 20 as a part of the air piston 30, the above-described design restriction is eliminated and the height of the discharge container is suppressed. Can do.

In the present specification, the “stem” means a member that rises from the liquid cylinder and reaches the nozzle head. In the illustrated example, the “stem” includes the stem peripheral wall SP and the cylindrical member 48, but the cylindrical member is omitted. It doesn't matter. The stem peripheral wall may be formed of a plurality of separate peripheral walls, which are referred to as a first stem peripheral wall 26, a second stem peripheral wall 28, and the like. In the present specification, the third cylindrical peripheral wall 55 is defined as a part of the stem S, which is a connecting cylindrical portion that is integrally suspended from the nozzle head. From the function of covering the outer peripheral surface of the stem of the actuating member 20 with the cover cylinder portion 38 standing up from the air piston, there is a difference in technical meaning whether the covered portion is integrated with the nozzle head or separate. Because there is no.
The “cover tube portion” may have any structure as long as it covers the periphery of the stem of the operating member.
For example, the cover tube portion may be a mere cover tube portion that does not come into contact with the outer peripheral surface of the stem, or the cover tube portion can be slidable on the outer peripheral surface of the stem so as to guide the raising and lowering of the stem. It doesn't matter. In the latter case, as shown in the illustrated example, a groove for forming the outside air introduction path P3 may be provided vertically on the inner surface of the guide tube portion to leave the function of sucking outside air.

  The second means includes the first means, and the nozzle head N is formed to have a larger outer diameter than the stem S, and the cover cylinder portion 38 is erected to the back side of the nozzle head N.

  In this means, as shown in FIG. 1, it is proposed that the cover tube portion 38 is erected up to the back side of the nozzle head N formed to have a larger outer diameter than the stem S. Thereby, it is possible to make it difficult for foreign matters such as water to enter from above the cover tube portion 38.

  The third means includes the first means or the second means, and the outer surface of the stem S is brought into contact with or close to the inner surface of the cover tube portion 38, and the cover tube portion 38 is moved to the flange hole. It was formed to be able to slide against the hole edge of 6a.

  In this means, the outer surface of the stem S is brought into contact with or close to the inner surface of the cover tube portion 38, and the cover tube portion 38 is formed to be slidable with respect to the hole edge of the flange hole 6a. Propose that. As a result, the stem S is supported in the lateral direction by the inward flange 6 of the mounting member 2 via the cover cylinder portion 38, and stable elevation is possible.

The fourth means includes any one of the first means to the third means, and the air piston 30 is separated from the slide cylinder portion 32 fitted to the outside of the stem S so as to be movable up and down. 34 projecting outward, and a sliding wall 42 slidably brought into contact with the inner surface of the air cylinder 12 is attached to the tip of the partition wall 34.
The cover cylinder part 38 stands up from the inner peripheral part of the partition wall part 34, and has an intake hole 36 at least in the partition part inside the cover cylinder part 38,
In addition, the length of the cover tube portion 38 is set to a length at which the tip of the cover tube portion 38 is not dropped from the flange hole 6a of the inward flange 6 at the lower limit position of the operating member 20.

In this means, the installation location of the cover tube portion 38 in the configuration of the air piston 30 is embodied, and the cover tube portion 38 is erected from the inner peripheral portion of the partition wall portion 34, and at least inside the cover tube portion 38. Opening the intake hole 36 in the partition wall portion is a constituent requirement. Thereby, an outside air introduction function can be secured appropriately.
Further, the length of the cover tube portion 38 is set such that the front end portion of the cover tube portion 38 does not fall off from the flange hole 6a of the inward flange 6 at the lower limit position of the operating member 20. Thereby, it can prevent that the cover cylinder part 38 remove | deviates from the flange hole 6a in the minimum position of the action | operation member 20, and a trouble arises in the movement of the action | operation member 20. FIG.

According to the invention relating to the first means, the cylinder member 10 having the air cylinder 12 and the liquid cylinder 14 is suspended from the mounting member 2 mounted on the mouth and neck of the container body 100, and the air cylinder 12 from the upper surface of the air piston 30 that can be moved up and down between the hole edge of the flange hole 6a of the inward flange 6 of the mounting member 2 and the stem S of the actuating member 20. Since the cover cylinder part 38 which covers an outer peripheral surface stood up from the upper surface of the said piston 30 for air, compared with the case where a cover cylinder part is stood up from the inward flange 6, the height of a foam discharger can be restrained low. .
According to the invention relating to the second means, since the cover cylinder part 38 stands up to the back side of the nozzle head N, water or the like is unlikely to enter from the tip of the cover cylinder part 38.
According to the third aspect of the invention, the cover cylinder portion 38 is configured such that the outer surface of the stem S can slide on the inner surface of the cover cylinder portion 38, and the outer surface of the cover cylinder portion 38 is the inward flange. Since the hole edge of the 6 flange holes 6a is formed to be slidable, the stem S can be moved up and down stably.
According to the fourth aspect of the invention, the length of the cover cylinder portion 38 is set at the lower limit position of the operating member 20 so that the tip end portion of the cover cylinder portion 38 does not fall out of the flange hole 6a of the inward flange 6. Because of the length, the drop does not hinder the movement of the air piston 30.

It is a longitudinal cross-sectional view of the foam discharger which concerns on 1st Embodiment of this invention. It is an enlarged view of the principal part of the foam discharger of FIG. It is a top view of the foam discharger of FIG. It is explanatory drawing of the action state of the foam discharger of FIG. It is a longitudinal cross-sectional view of the foam discharger which concerns on 2nd Embodiment of this invention. It is an enlarged view of the principal part of the foam discharger of FIG. It is explanatory drawing of the action state of the foam discharger of FIG.

1 to 4 show a foam discharger according to a first embodiment of the present invention. For convenience of explanation, the basic configuration of the present invention will be mainly described first.
The foam discharger includes a mounting member 2, a cylinder member 10, a poppet valve member 18, and an operating member 20. Each of these members can be formed of, for example, a synthetic resin or a metal.

  The mounting member 2 projects the inward flange 6 inwardly from the upper end portion of the mounting cylinder portion 4 that can be fitted (screwed in the illustrated example) to the mouth / neck portion 102 of the container body 100, and the outer periphery of the lower surface of the inward flange 6 The seal cylinder portion 7 is suspended from the portion, and the upright peripheral wall 8 protrudes upward from the hole edge of the flange hole 6a of the inward flange 6. This standing peripheral wall will be described later.

In this embodiment, the cylinder member 10 has a small-diameter liquid cylinder 14 from the lower end portion of the large-diameter air cylinder 12 and a mounting cylinder portion 16 from the lower end portion of the liquid cylinder 14 via the reduced diameter portion 14a. Each droops.
A thick flange portion b is attached to the upper end portion of the air cylinder 12, and the seal cylinder portion 7 is fitted into an annular groove provided around the width direction intermediate portion of the flange portion b. ing. A vent hole 13 is opened in the upper outer peripheral surface of the air cylinder 12. In the state shown in FIG. 1, the vent hole 13 is closed by an air piston 30 which will be described later, and is opened when the operating member 20 is lowered as shown in FIG. 4, via an outside air introduction path P3 which will be described later. The inside of the container body 100 is communicated with the outside.
In the illustrated example, the reduced diameter portion 14a projects in a tapered shape from the outer peripheral side to the lower inner side, and the inner surface of the reduced diameter portion 14a serves as the first check valve seat 15 for the liquid. Further, the upper portion of the suction pipe 17 is fitted in the mounting cylinder portion 16. However, these shapes can be changed as appropriate. From the inner surface of the liquid cylinder 14, a plurality of locking ribs 14 b protrude radially inward from each other at a constant interval. A coil spring C is interposed between the locking rib 14b and a liquid piston 22 described later.

  The poppet valve member 18 has a length extending from the inside of the liquid cylinder 14 into the lower portion of the stem, and is positioned on the outer surface of the lower end portion between the locking ribs 14b of the liquid cylinder 14 respectively. The engaging protrusion 18a protrudes. The poppet valve member 18 is changed from the state shown in FIG. 1 (the engagement protrusion 18a is in contact with the lower surface of the coil spring C) to the state shown in FIG. The first liquid check valve VL1 is mounted between the lower end portion 18b of the poppet valve member 18 and the first liquid check valve seat 15. Forming. The illustrated poppet valve member 18 has a lower portion as a large diameter portion and an upper portion as a small diameter portion, and a tapered valve portion 18c that expands into a tapered cylindrical shape is formed at the upper end of the small diameter portion.

The actuating member 20 is assembled to the cylinder member 10 so as to be vertically movable in an upwardly biased state, and as shown in FIG. 1, a liquid piston 22, a first stem peripheral wall 26, a second stem peripheral wall 28, The piston 30 for air, the cylindrical member 48, and the head member 50 are provided.
In the present specification, for convenience of explanation, as shown in FIG. 1, a cylindrical shape formed by a second stem peripheral wall 28 of the first stem peripheral wall 26 and a third stem peripheral wall 55 (a connecting cylinder portion) described later. This structure is referred to as a stem peripheral wall SP, and the stem S is formed by the stem peripheral wall SP and the tubular member 48.

  The liquid piston 22 has a slidable contact portion 22a that can slide in the liquid cylinder 14, and has a vertical cylindrical portion 22b that is open at both upper and lower ends from the slidable contact portion 22a. The vertical cylinder portion 22b is fitted to the inner surface of the lower end portion of the first stem peripheral wall 26. The second liquid check valve VL2 is composed of a second liquid check valve seat 22c provided at the upper end of the vertical cylinder portion 22b and the tapered valve portion 18c placed on the valve seat. Forming. The upper end portion of the coil spring C is engaged with the lower portion of the vertical cylinder portion 22b. The illustrated sliding contact portion 22a is formed in an upper and lower skirt shape.

The first stem peripheral wall 26 serves as a piston guide that guides raising and lowering of an air piston, which will be described later.
The first stem peripheral wall 26 of the present embodiment has a cylindrical shape with both upper and lower ends open, and the vertical cylindrical portion 22b of the liquid piston 22 is fitted into the lower portion of the cylindrical wall, and rises upward from the fitting location. is doing.
The first stem peripheral wall 26 is linked to the upper part of the outer surface of the first stem peripheral wall 26 so that the air piston 30 sliding in the air cylinder 12 can be moved up and down.
A third liquid check valve VL <b> 3 is formed in the upper portion of the first stem peripheral wall 26. The third check valve VL3 in the illustrated example is formed by a tapered valve seat protruding inward from the upper inner surface of the first stem peripheral wall 26, and a ball valve placed on the valve seat. Has been. In the first stem peripheral wall portion above the ball valve, a lower half portion of a cylindrical member 48 to be described later, which also serves as a ball valve presser, is fitted.
Further, an inner rib 26e is provided vertically on the inner surface portion of the first stem peripheral wall 26 between the third liquid check valve VL3 and the second liquid check valve seat 22c.
Further, a second air check valve seat 26b protruding in a flange shape is provided at the intermediate portion in the vertical direction on the outer surface of the first stem peripheral wall 26, and is positioned above the second air check valve seat 26b. A plurality of outer ribs 26a are provided vertically from the outer surface of the first stem peripheral wall at intervals in the circumferential direction.
The inside of the first stem peripheral wall 26 communicates with a nozzle 54 of a head member 50 described later.
For convenience of explanation, a flow path portion extending from the inside of the liquid piston 22 to the nozzle head N is referred to as a main flow path P1.

The second stem peripheral wall 28 serves as a joint cylinder that connects the first stem peripheral wall 26 to the head member 50.
The second stem peripheral wall 28 in the illustrated example has a small outer portion e formed on the upper portion of the peripheral wall, and a third peripheral wall (connecting cylinder portion) 55 of a nozzle member 50 described later is connected to the small outer diameter portion. ing. However, these structures can be changed as appropriate.
The lower portion of the second stem peripheral wall 28 surrounds the upper portion of the first stem peripheral wall 26 and is fitted to the upper portion of the first stem peripheral wall 26.
A first large inner diameter portion d1 is recessed in the inner peripheral lower end portion of the second stem peripheral wall 28, and the inner surface of the peripheral wall portion from the first large inner diameter portion to the vicinity of the lower end of the small outer diameter portion is A groove portion which is a part of a communication path P2 described later is formed, and this groove portion is opened to the main flow path.
An upper half portion of a cylindrical member 48 described later is fitted into the small outer diameter portion e of the second stem peripheral wall 28, and foaming means I is incorporated in the upper half portion.

The air piston 30 functions to partition the space between the first stem peripheral wall 26 and the air cylinder 12 in the vertical direction and form an air chamber A below the air cylinder 12.
In the present embodiment, the air piston 30 has a slide cylinder portion 32 on the inner peripheral side thereof, and the slide cylinder portion 32 is fitted to the outer periphery of the first stem peripheral wall 26 so as to be movable in a small width. At the same time, a sliding wall 42 is projected through a partition wall 34 extending from the outer periphery of the slide cylinder 32.
The slide cylinder portion 32 has an inner surface of the cylinder wall as an outer surface of the outer rib 26a on the outer periphery of the first stem peripheral wall 26, and an outer surface of the upper portion of the cylinder wall as a first large inner diameter portion d1 of the second stem peripheral wall 28. Each is fitted so as to be able to move up and down, so that it can be moved up and down between the top surface of the first large inner diameter portion d1 and the second check valve seat 26b for air.
The lower end of the slide cylinder 32 is designed as a valve body so as to abut against the surface of the second air check valve seat 26b. The lower end of the slide cylinder 32 and the second air check A second air check valve VA2 is formed by the valve seat 26b.
The lower end portion of the slide cylinder portion 32 and the second air check valve seat 26b form a second air check valve VA2.
The second air check valve VA2 is closed when the actuating member 20 is pushed up to the uppermost position, opens when the actuating member 20 is pushed down, and is further pushed upward from the depressed state. It has a function of closing when it is lifted by.
The first stem peripheral wall 26 passes from the second air check valve VA2 via the gap between the first stem peripheral wall 26 and the slide cylinder portion 32 and the gap between the first stem peripheral wall 26 and the second stem peripheral wall 28. A communication path P2 is formed to reach the junction J with the inner main flow path P1.
The partition wall 34 includes a first air check valve VA1 for introducing outside air through an outside air introduction path P3 described later. As shown in FIG. 2, the partition wall 34 in the illustrated example is lowered stepwise from an inner peripheral wall 34 a that is a high step to an outer peripheral wall 34 c that is a lower step through an intermediate wall 34 b that is a middle step. It is formed as follows. The first air check valve VA1 is formed from the inner peripheral wall portion 34a to the intermediate wall portion 34b.
In the illustrated example, the first air check valve VA1 includes an intake hole 36 cut out from the inner peripheral wall portion 34a to a step portion between the inner peripheral wall portion 34a and the intermediate wall portion 34b, and a lower side of the intake hole. And an attached valve member 44.
The valve member 44 has an elastic valve plate protruding outward from a lower portion of a cylinder attached to the slide cylinder portion 32, and this elastic valve plate is brought into contact with the lower surface of the intermediate wall portion 34b. . These configurations can be changed as appropriate.
A cover cylinder portion 38 is erected from the vicinity of the intake hole formation portion in the inner peripheral wall portion 34a. This will be described later.
The sliding wall portion 42 is fitted to the inner periphery of the air cylinder 12 in a liquid-tight manner and slidably. The illustrated sliding wall portion 42 is formed in an upper and lower skirt shape.

The tubular member 48 serves to regulate the flow path and hold the foaming means I. The illustrated cylindrical member 48 has a lower half portion with a small diameter fitted to the upper end portion of the first stem peripheral wall 26 and an upper half portion with a large diameter fitted to the upper portion of the second stem peripheral wall 28. The foaming means I is fitted in the half. A communication groove 48a that is a part of the communication path P2 is formed on the outer surface of the lower half of the cylindrical member 48.
The foaming means I is formed by stretching a mesh i2 on the end surface of the holding cylinder part i1. A plurality of holding cylinder portions i1 may be arranged as shown.

In the present embodiment, the head member 50 is formed by hanging a connecting cylinder portion 55 that is a third stem peripheral wall from a nozzle head N that is a main body of the head member.
The nozzle head N connects the center of the back surface of the top wall portion 51 to the upper end of the connecting cylinder portion 55, hangs down the head peripheral wall 52 from the outer periphery of the top wall portion 51, and communicates with the second stem peripheral wall 28. The nozzle 54 that projects is projected outwardly through the head peripheral wall 52. However, these structures can be changed as appropriate. For example, the second stem peripheral wall 28 may be integrated with the connecting cylinder portion 55 and incorporated in the head member 50.

  In the above configuration, when the head member 50 is pushed down from the state of FIG. 1, the first stem peripheral wall 26 and the air piston 30 are lowered, but the first stem peripheral wall 26 is slightly lowered compared to the air piston 30. Therefore, the second air check valve VA2 is opened (see FIG. 4), and the air in the air chamber A is introduced into the first stem peripheral wall 26 through the communication path P2 by the lowering of the air piston 30. The liquid piston 22 is lowered by the depression of the head member 50, and the poppet valve member 18 is also lowered so as to contact the first liquid check valve seat 15 following the lowering of the liquid piston 22. The first liquid check valve VL1 is closed, and even after this contact, the first stem peripheral wall 26 and the liquid piston 22 are lowered, so that the second liquid check valve VL2 is opened (see FIG. 4). Next, the third liquid check valve VL3 opens due to the high pressure inside the liquid cylinder, and the high pressure liquid mixes with air at the junction J. This mixed fluid is bubbled through the foaming means I and discharged from the discharge port 54 of the nozzle.

  When the pressing of the head member 50 is released, the actuating member 20 is lifted by the urging force of the coil spring C. At this time, the first stem peripheral wall 26 is lifted with respect to the air piston 30 and the second air check valve. Since the VA2 is closed and the first air check valve VA1 is opened due to the negative pressure in the air chamber A, air passes from the upper side of the cover cylinder portion 38 through the outside air introduction path P3 and the first air check valve VA1. To enter the air chamber A. Further, the poppet valve member 18 rises following the rise of the first stem peripheral wall 26 by the frictional force between the tapered valve portion 18c and the inner rib 26e, and the first liquid check valve VL1 opens and the liquid Due to the negative pressure in the cylinder 14, the third liquid check valve VL3 is closed. The liquid in the container body 100 is sucked up into the liquid cylinder 14 which has been reduced in pressure. The poppet valve member 18 rises until the engagement protrusion 18a comes into contact with the lower end of the coil spring C, and stops by contact. The first stem peripheral wall 26 and the liquid piston 22 are raised even after the poppet valve member 18 is stopped, and the second liquid check valve seat 22c abuts against the tapered valve portion 18c. The check valve VL2 is closed.

In the present invention, a cover cylinder portion 38 that extends upward from the air piston 30 through between the edge of the flange hole 6 a of the inward flange 6 and the outer surface of the stem S is raised.
This cover cylinder part 38 replaces the upright peripheral wall which stood upright from the inner periphery of the said inward flange 6 in the prior art, and covers a stem. The cover cylinder portion 38 of the present invention is erected from the air piston 30, and as described above, the air piston 30 is the stem S of the operating member 20 when the nozzle head N of the operating member 20 is pushed down. Therefore, the total height of the foam discharger can be suppressed. This is because it is not necessary to provide a pressing allowance corresponding to the stroke of the actuating member between the upper end of the upright peripheral wall and the nozzle head as in the prior art. By suppressing the overall height, it is possible to reduce the weight and cost of the foam discharger.
The cover cylinder part 38 surrounds the stem S of the operating member 20, and an outside air introduction path P <b> 3 is formed between the inner surface of the cover cylinder part 38 and the outer surface of the stem S.
The cover cylinder part 38 of this embodiment has a function of preventing foreign substances such as water from flowing into the gap between the flange hole 6a and the stem S, and the outer surface of the cover cylinder part 38 is in contact with the flange hole 6a. It is possible to slide smoothly, contact with no gap, or close enough to suppress the entry of air or water.
An outside air introduction path P <b> 3 is formed between the inner surface of the cover cylinder portion 38 and the outer surface of the stem S. In a preferred illustrated example, a plurality of vertical ridges 38a are provided on the inner surface of the cover tube portion 38 so as to be slidably brought into contact with the outer surface of the stem S at intervals. An outside air introduction path P3 is formed between the strips 38a.
Further, in the illustrated example, the upright peripheral wall 8 protruding upward from the edge of the flange hole 6a of the inward flange 6 can be slidably contacted with the outer surface of the cover cylinder portion 38, or can be brought into contact with no gap, or air, water, etc. Shall be close enough to prevent intrusion of As a result, the upright peripheral wall 8 guides the raising and lowering of the cover cylinder part 38, and the cover cylinder part 38 guides the raising and lowering of the stem S of the actuating member 20. Can be effectively prevented.
The length of the cover tube portion 38 is designed such that the cover tube portion 38 does not fall out of the flange hole 6a of the inward flange 6 at least when the operating member 20 is lowered to the lower limit position. In other words, at the lower limit position of the actuating member 20, it is designed so that the height of the upper end portion of the cover cylinder portion 38 is not lower than the lower surface of the inward flange 6. As a result, the operating member is smoothly raised and lowered.
In the present embodiment, an outside air introduction path P <b> 3 is formed between the inner surface of the cover tube portion 38 and the outer surface of the stem S, and the cover tube portion 38 is placed on the lower surface of the nozzle head N at the upper limit position of the operating member 20. It stands up to the vicinity. Since the nozzle head N has a larger outer diameter than the cover tube portion 38 and covers the upper portion of the cover tube portion 38 in this state, the air intake port h at the upper end of the outside air introduction path P3 is increased by this configuration. The shower is difficult for water to enter. In this embodiment, the flow area of the outside air introduction path P3 can be increased.
In a preferred illustrated example, an auxiliary cylinder part 53 having a diameter larger than that of the cover cylinder part 38 is suspended from the back surface of the nozzle head N so as to have the same length as the head peripheral wall 52, and is located above the lower end of the auxiliary cylinder part 53. The cover tube portion 38 is erected. With this configuration, it is possible to further prevent water from entering the outside air introduction path P3.
The cover cylinder portion 38 is erected from the vicinity of the intake hole forming portion of the inner peripheral wall portion 34a. In the illustrated example, the air intake hole 36 is formed from the inside to the outside of the cover tube portion 38, so that the space between the inward flange 6 and the air piston 30 is outside the cover tube portion 38. Since the space portion communicates with the outside air introduction path P3, the space portion does not become negative pressure when the air piston 30 is lowered.
A spacer T indicated by an imaginary line in FIG. 1 can be attached between the lower end surface of the auxiliary cylinder portion 53, the inward flange 6 and the upper surface.

  Hereinafter, a foam dispenser according to another embodiment of the present invention will be described. In these descriptions, the description of the same configuration as that of the first embodiment is omitted.

5 to 7 show a foam discharger according to a second embodiment of the present invention.
In this embodiment, instead of deleting the poppet valve member in the configuration of the first embodiment, the stem S of the actuating member 20 is replaced with the stem peripheral wall (the first stem peripheral wall 26, the second stem peripheral wall 28, and the third stem peripheral wall 58. A rod-like member 24 is assembled to the SP and the liquid piston 22 can be raised and lowered with respect to the stem S, and an air sealing means is provided between the liquid piston 22 and the air piston 30. AS and a liquid sealing means LS are provided between the liquid piston 22 and the stem S, and the liquid piston 22 and the air piston 30 are connected to the stem S in order to exhibit the sealing function of both the sealing means. A structure (an outward flange 24c of a rod-shaped member and a raised wall portion 40) is provided between a part of the mounting member 2 and the inward flange 6 of the mounting member 2. This will be specifically described below.
In the present embodiment, the operating member 20 has an air piston 30 on the upper half of the outer surface of the stem S with the nozzle head N attached to the upper end, and a liquid piston 22 on the lower half of the outer surface of the stem. Each is attached so that it can be raised and lowered. The cylindrical member is not provided among the configurations of the first embodiment. This will be specifically described below.

The stem S of the present embodiment is configured such that the outer surface of the vertically oriented rod-shaped member 24 is fitted in the lower portion of the stem peripheral wall SP continuous with the nozzle head N (see FIG. 6), and the liquid piston 22 is The air piston 30 is assembled so as to be movable up and down with respect to the stem S so as to surround the stem peripheral wall SP.
The liquid piston 22 is fitted into an insertion tube portion 22d from an intermediate portion in the vertical direction of a vertical tube portion 22b erected from a sliding contact portion 22a sliding on the inner surface of the liquid cylinder 14 through an inwardly extending wall portion f1. The ring-shaped raised wall 22e is raised upward and outward from an outwardly extending wall portion f2 formed at the upper end portion of the vertical cylindrical portion 22b.
A liquid seal portion s1 is formed at a corner portion between the lower surface of the inwardly extending wall portion f1 and the inner surface of the fitting tube portion 22d (see FIG. 6). Of course, this structure can be changed as appropriate. Although not shown, the liquid seal portion s1 may be formed by a hanging plate portion provided around the lower surface of the inwardly extending wall portion f1, for example.
An air seal receiving surface r2 is formed on the inner peripheral surface of the ring-shaped raised wall 22e.
As shown in FIG. 5, the stem peripheral wall SP is formed by connecting the upper part of the first stem peripheral wall 26 to the lower part of the second stem peripheral wall 28 and the upper part of the second stem peripheral wall 28 to the third stem peripheral wall 55. . A second large inner diameter portion d2 is formed at the lower portion of the first stem peripheral wall 26, and the fitting insertion tube portion 22d is slidably fitted into the second large inner diameter portion d2.
Unlike the first embodiment, the second stem peripheral wall 28 of the present embodiment has a structure in which a constricted portion 28b is provided between the lower cylindrical portion 28a and the upper cylindrical portion 28c. Further, the cylindrical member 48 and the third liquid check valve VL3 of the first embodiment are omitted, and a top-shaped cylindrical flow path regulating means 26c is formed in the upper part of the first stem peripheral wall 26. . A plurality of communication holes are opened in the circumferential direction on the cylindrical wall of the flow path regulating means 26c. The foaming means I is disposed in the upper cylindrical portion 28 c of the second stem peripheral wall 28.

The rod-like member 24 is a substantially rod-like member that is long in the vertical direction as a whole. In the illustrated example, the rod-like member 24 is formed in a cylindrical body whose lower end is closed by a bottom portion (partition plate portion 24d).
In the illustrated example, the rod-shaped member 24 is provided with an outward flange 24c at the middle part in the longitudinal direction (vertical direction), and is divided into a lower half cylinder part 24a and an upper half cylinder part 24b by the outward flange 24c. Has been. The upper half cylinder part 24b is fitted into the lower part of the first stem peripheral wall 26, and a liquid passage hole 24e is opened at the lower part of the cylinder wall of the upper half cylinder part 24b.
Further, in the illustrated example, the outward flange 24c protrudes from the outer surface of the rod-shaped member, being positioned substantially in the middle in the longitudinal direction (vertical direction) of the rod-shaped member. The outward flange 24c is placed on the upper end of the coil spring C, and the entire operation member 20 is biased upward via the outward flange 24c.
As shown in FIG. 6, a taper-shaped build-up is performed at a location extending from the inner end portion of the outward flange 24c to the lower end portion of the cylindrical wall of the upper half tube portion 24b. The outer surface is formed on the liquid seal receiving surface r1. The liquid seal receiving surface r1 and the liquid seal portion s1 form a liquid seal means LS that also serves as the second liquid check valve VL2. This will be described later.
Although the outer end of the outward flange 24c is close to the inner surface of the vertical tube portion 22b as shown in FIG. 6, it may be slidably contacted. A groove m for liquid passage is formed in a part of the outer end of the outward flange 24c in the circumferential direction.

The air piston 30 is formed on a part of the partition wall portion 34 that connects the slide cylinder portion 32 and the sliding wall portion 42 to a raised wall portion for contacting the back surface of the inward flange 6 at the upper limit position of the operating member 20. 40 is formed.
In the present embodiment, unlike the first embodiment, the partition wall portion 34 is a low step portion from an inner peripheral wall portion 34a that is a middle step portion to an intermediate wall portion 34b that is a high step portion, as shown in FIG. A certain outer peripheral wall 34c is continuously formed. The raised wall portion 40 is formed by raising the outer portion of the inner peripheral wall portion 34a of the partition wall portion 34 upward so that the upper ends of the inner cylinder portion 40a and the outer cylinder portion 40b surrounding the stem S are inwardly flanged. 6 It forms by connecting with the cyclic | annular upper wall part 40c which is a wall part for contact | abutting to a back surface. Further, in the illustrated example, the cover tube portion 30 is extended upward from the upper portion of the inner tube portion 40a, and the upper wall portion of the raised wall portion 40 is formed outside the cover tube portion 38 at the upper limit position of the operating member 20. 40c is formed so that it may contact | abut to the whole inner peripheral part lower surface of the inward flange 6. FIG.
By bringing the inward flange 6 into pressure contact with the air piston 30 on the entire circumference surrounding the stem S, the pressure contact force can be evenly transmitted to the air sealing means AS and the liquid sealing means LS. Of course, this structure can be changed as appropriate. Although not shown, for example, a drooping cylinder portion for pushing down the piston for air may be suspended from the hole edge of the flange hole 6a of the inward flange 6.
In the illustrated example, an intake hole 36 is opened in the upper part of the inner cylinder part 40a of the raised wall part 40, and the first air is formed by the intake hole 36 and the valve member 44 attached to the lower part of the inner cylinder part 40a. A check valve VA1 is formed. The illustrated valve member 44 has an elastic valve plate protruding outwardly from the lower end of a cylinder fitted to the lower portion of the inner cylinder portion 40a, and this elastic valve plate is brought into contact with the lower surface of the intermediate wall portion 34b. Become.
Further, in the raised wall portion 40, a pressing plate portion q having both ends connected to the inner tube portion 40a and the outer tube portion 40b is suspended from the upper wall portion 40c. The upper end of the valve body of the valve member 44 is abutted.
The outer cylinder portion 40b has a communication port 37 that allows the space between the air piston 30 and the inward flange 6 to communicate with the outside air introduction path P3 (see FIG. 6).
In the present embodiment, as shown in FIG. 6, the air seal portion s2 protrudes downward from the vicinity of the lower end portion of the slide cylinder portion 32 so that the air seal portion s2 abuts against the air seal receiving surface r2. The air sealing means AS that also serves as the second air check valve VA2 is formed by the air sealing portion s2 and the air sealing receiving surface r2.
In the illustrated example, the lower end portion of the slide cylinder portion 32 is connected to the inner end portion of the inner peripheral wall portion 34a of the partition wall portion 34, and a cylindrical projection is provided as an air seal portion s2 from the inside of this connection location. ing. However, these structures can be changed as appropriate.

In the present invention, the bubble discharger is a state where the actuating member 20 is at the upper limit position as shown in FIG. 1, and the air seal means AS which is the entrance of the communication path P2 and the liquid seal means LS formation location in the discharge path P1. Sealed at two places of formation.
That is, the liquid seal portion s1 of the liquid piston 22 is formed on the liquid seal receiving surface r1 of the rod-shaped member 24 biased upward by the coil spring C, and the air seal receiving surface r2 of the liquid piston 22 is formed. The air seal portion s2 of the air piston 30 is mounted on the lower surface of the inward flange 6, and the upper wall portion 40c of the raised wall portion 40 is in contact with the lower surface of the inward flange 6. The lower end of the coil spring C is locked to the lower portion of the cylinder member 10, and the upper end portion of the cylinder member 10 is fixed to the mounting member 2.
Therefore, as shown in FIG. 6, the coil spring C pushes up the actuating member 20 (upward biasing force F1) and the reaction from the inward flange 6 (pressing force F2) causes the liquid piston 30 to use the liquid. A portion of the piston 22 that extends over the inwardly extending wall portion f1 is sandwiched from above and below. Thereby, for example, when the container equipped with the foam discharger is brought down or the internal pressure of the container body rises for some reason, it is possible to prevent the liquid piston 22 and the air piston 30 from rattling against the cylinder member 10. The sealing performance of the liquid sealing means LS and the air sealing means AS can be enhanced.
That is, as described above, the liquid seal means LS is formed by the liquid seal receiving surface r1 and the liquid seal portion s1, but due to the upward biasing force of the coil spring C, the liquid seal portion s1 is liquid. Forcibly pressed against the seal receiving surface r1, and in particular, the liquid seal receiving surface r1 that is an inclined surface in the illustrated example is configured so that the square liquid seal portion s1 bites into the liquid seal receiving surface r1. As in Document 1, the large-diameter upper end portion of the poppet valve member is placed on the upper end portion of the cylindrical liquid piston, and the sealing performance is improved as compared with the configuration in which the poppet valve member is sealed by its own weight.
Further, as described above, the air seal means AS is formed by the air seal receiving surface r2 and the air seal portion s2. However, the air seal portion s2 is also air by the upward biasing force of the coil spring C. For example, in the illustrated example, an air seal portion s2 formed near the lower end of the cylindrical wall of the slide cylinder portion 32 is formed on the inclined surface portion of the air seal receiving surface r2 in the illustrated example. Compared to a structure in which a part of the piston for air linked to the stem is simply seated on a flange-like valve seat formed on the stem of the operating member, as in Patent Document 1, in order to bite in. Thus, the sealing performance is improved.
Thereby, inconveniences such as bubbles entering the air chamber A from the communication path P2 can be avoided.

DESCRIPTION OF SYMBOLS 2 ... Mounting member 4 ... Mounting cylinder part 6 ... Inward flange 6a ... Flange hole 7 ... Sealing cylinder part 8 ... Standing peripheral wall 9 ... Hanging wall part 10 ... Cylinder member 12 ... Air cylinder 13 ... Vent hole 14 ... Liquid cylinder 14a ... Reduced diameter portion 14b ... Locking rib 15 ... First liquid check valve seat 16 ... Mounting cylinder portion 17 ... Suction pipe 18 ... Poppet valve member 18a ... Engagement protrusion 18b ... Lower end portion 18c ... Tapered valve portion 20 ... Operating member 22 ... Liquid piston 22a ... Sliding contact part 22b ... Vertical cylinder part 22c ... Second liquid check valve seat 22d ... Fitting insertion cylinder part 22e ... Ring-like raised part 24 ... Bar-like member 24a ... Lower half cylinder part 24b ... Upper half cylinder part 24c ... Outward flange 24d ... Partition plate part 24e ... Liquid passage hole 24f ... Slit 26 ... First stem peripheral wall (piston guide) 26a ... Outer rib 26b ... Second air check valve 26c ... flow path regulating means 26 d ... vertical ridges 26e ... inner ribs 28 ... second stem wall 28a ... lower cylindrical portion 28b ... constricted portion 28c ... upper tubular portion 30 ... Air piston 32 ... slide cylindrical portion
34 ... Partition wall portion 34a ... Inner peripheral wall portion 34b ... Intermediate wall portion 34c ... Outer peripheral wall portion 36 ... Intake hole 37 ... Communication port 38 ... Cover tube portion 38a ... Vertical ridge 38b ... Vertical groove portion 40 ... Raised wall portion 40a ... Inner tube Part 40b ... Outer cylinder part 40c ... Upper wall part 41 ... Holding plate
DESCRIPTION OF SYMBOLS 42 ... Sliding wall part 44 ... Valve member 48 ... Cylindrical member 48a ... Communication groove 50 ... Head member 51 ... Top wall part 52 ... Head peripheral wall 53 ... Auxiliary cylinder part 54 ... Discharge port (nozzle)
55 ... Third stem peripheral wall (connecting cylinder)
DESCRIPTION OF SYMBOLS 100 ... Container body 102 ... Mouth-and-neck part A ... Air chamber AS ... Sealing means for air b ... Gutter part C ... Coil spring d1 ... First large inner diameter part d2 ... Second large inner diameter part e ... Small outer diameter part f ... Tension Exit plate part f1 ... Inwardly extended plate part f2 ... Outwardly extended board part h ... Air intake port I ... Foaming means i1 ... Holding cylinder part i2 ... Mesh J ... Confluence LS ... Liquid sealing means m ... Cut groove N ... Nozzle head p ... Packing P1 ... Main flow path P2 ... Communication path P3 ... Outside air introduction path
q ... Holding plate R ... Gas-liquid mixing chamber r1 ... Liquid seal receiving surface r2 ... Air seal receiving surface S ... Stem SP ... Stem peripheral wall s1 ... Liquid seal portion s2 ... Air seal portion T ... Spacer VL1 ... First Check valve for liquid VL2 ... Check valve for second liquid VL3 ... Check valve for third liquid VA1 ... Check valve for first air VA2 ... Check valve for second air

Claims (4)

A mounting member (2) formed by inwardly projecting an inward flange (6) from the upper part of the mounting cylinder (4) that can be mounted on the mouth and neck of the container body;
A cylinder member (10) in which a small-diameter liquid cylinder (14) is suspended from a large-diameter air cylinder (12) attached to the mounting member (2);
The stem (S) protrudes upward from the liquid piston (22) that can move up and down in the liquid cylinder (14), and the air piston that is in sliding contact with the air cylinder (12) outside the stem (S). Nozzle head (N) having a discharge port (54) above the stem (S) is formed and linked to the upper (30) so as to be capable of relative vertical movement, and the operating member (20 )When,
And the second air from the air cylinder (12) and the liquid pumped from the liquid cylinder (14) via the second liquid check valve (VL2) by raising and lowering the operating member (20). The air pumped through the check valve (VA2) is mixed, foamed and discharged from the discharge port (54), and from the container body side through the first liquid check valve (VL1). In the foam dispenser provided to suck liquid into the cylinder (14) and to introduce outside air into the air cylinder (12) via the first air check valve (VA1),
From the upper surface of the air piston (30), the outer peripheral surface of the stem (S) passes between the edge of the flange hole (6a) of the inward flange (6) and the outer peripheral surface of the stem (S). A discharge container characterized in that the cover tube portion (38) for covering is erected.   The nozzle head (N) is formed to have a larger outer diameter than the stem (S), and the cover tube portion (38) stands up to the back side of the nozzle head (N). Foam dispenser.   The outer surface of the stem (S) is brought into contact with or close to the inner surface of the cover tube portion (38), and the cover tube portion (38) is slid with respect to the hole edge of the flange hole (6a). The foam dispenser according to claim 1 or 2, characterized in that it is formed. The air piston (30) protrudes outward from the slide cylinder portion (32) fitted to the outside of the stem (S) so as to be movable up and down, and the partition portion (34) A sliding wall portion (42) slidably in contact with the inner surface of the air cylinder (12) is attached to the tip,
The cover tube portion (38) stands up from the inner peripheral portion of the partition wall portion (34) and has an intake hole (36) at least in the partition wall portion inside the cover tube portion (38),
In addition, the length of the cover tube portion (38) is set at the lower limit position of the actuating member (20), and the tip end portion of the cover tube portion (38) does not fall off from the flange hole (6a) of the inward flange (6). The foam discharger according to any one of claims 1 to 3, wherein the foam discharger has a length.