JP6240522B2 - Former dispenser - Google Patents

Description

  The present invention relates to a former dispenser.

Conventionally, for example, a former dispenser as shown in Patent Document 1 below is known. The former dispenser has a stem erected so as to be movable downward in an upward biased state at a mouth portion of a container body in which a liquid is stored, a pressing head disposed at an upper end portion of the stem and having a nozzle hole formed therein, An urging member for urging the stem upward; a liquid piston linked to the stem; a liquid cylinder in which the liquid piston is housed slidably up and down; an air piston linked to the stem; An air cylinder in which an air piston is slidably moved vertically, a gas-liquid mixing chamber for mixing the liquid from the liquid cylinder and the air from the air cylinder, and the gas-liquid mixing chamber and the nozzle hole. And a foaming member that foams the gas-liquid mixture from the gas-liquid mixing chamber.
The former dispenser pushes down the pressing head to move the stem downward, thereby transferring the liquid in the container and mixing it with air, and discharging a foam formed by foaming these gas-liquid mixture.

Japanese Patent Laid-Open No. 2005-13945

  However, in the conventional former dispenser described above, the liquid may dry and solidify on the foam member in the process of repeated use. In addition, when a liquid solidifies on a foaming member, there exists a possibility that it may become difficult to foam a foam to appropriate foam quality, for example.

  This invention is made | formed in view of such a situation, Comprising: It aims at providing the former dispenser which can suppress that a liquid solidifies on a foaming member.

In order to solve the above problems, the present invention proposes the following means.
A former dispenser according to the present invention includes a pump having a stem erected in an upwardly biased state at a mouth portion of a container body in which a liquid is accommodated, and a nozzle hole disposed at an upper end portion of the stem. A presser head, and a liquid piston and an air piston linked to the stem, and the liquid piston is accommodated in the pump so as to be slidable vertically. A liquid cylinder, an air cylinder in which the air piston is housed slidably up and down, and a gas-liquid mixing chamber for mixing the liquid from the liquid cylinder and the air from the air cylinder An air passage that communicates between the air cylinder and the gas-liquid mixing chamber, and a foam member that foams the gas-liquid mixture from the gas-liquid mixing chamber. And a lower stem extending downward from the upper stem, and the upper stem is supported to be movable downward in an upward biased state with respect to the lower stem. A connection path having an upper and lower flow path extending in the vertical direction is disposed between the nozzle hole and the foaming member, and the lower stem is erected upward, and the vertical flow path A closing body that closes the upper end opening of the upper stem is provided, and when the upper stem descends with respect to the lower stem, the closing body opens the upper end opening, and the lower stem is inserted into the air piston. The lower stem is provided with a flange-shaped contact portion that protrudes outward in the radial direction of the lower stem and contacts the lower end of the tube portion from below the tube portion. A part of the air passage is connected to the cylindrical portion and the lower step. A seal portion is disposed on one of the upper stem and the lower stem so as to be separably close to the other stem, and the seal portion includes the air passage. The communication between the gas-liquid mixing chamber and the air cylinder that are passed through is blocked, and the gas-liquid mixing chamber and the air cylinder are separated from the other stem by pressing the pressing head and through the air passage. It is characterized by communicating with the inside.

According to this configuration, when the foam head is discharged, when the pressing head is pressed, the upper stem descends relative to the lower stem, thereby opening the upper end opening of the upper and lower flow paths. When the stem is lowered together with the upper stem and the pressing head, the liquid piston and the air piston are also lowered. Thus, the liquid in the liquid cylinder and the air in the air cylinder are supplied into the gas-liquid mixing chamber, and the liquid and air are mixed to form a gas-liquid mixture. Further, when the gas-liquid mixture passes through the foaming member, the gas-liquid mixture is foamed to form a foam, and the foam is discharged from the nozzle hole through the connection path.
On the other hand, when the pressing of the pressing head is released, the pressing head, the stem, the liquid piston, and the air piston are restored and displaced upward. At this time, the upper stem is restored and displaced upward with respect to the lower stem, so that the closing body closes the upper end opening of the upper and lower flow paths. Thereby, the communication between the nozzle hole through the connection path and the gas-liquid mixing chamber is blocked.
In the former dispenser of the present invention, since the lower stem is provided with a closing body that closes the upper end opening of the upper and lower flow paths, the foaming member passes through the nozzle hole and the upper end opening in the standby state before the pressing head is pressed. Can be prevented from being exposed to the open air. As a result, it is possible to prevent the liquid from drying and solidifying on the foam member, and for example, it is possible to maintain stable foaming of suitable foam quality.

  In particular, since either one of the upper stem and the lower stem is provided with a seal portion that is detachably in contact with the other stem, the internal pressure of the air cylinder rises, etc. When the air piston rises with respect to the air-liquid piston, the cylinder portion of the air piston is separated from the contact portion, and the air passage is communicated with the air cylinder. The state where the communication with the air cylinder is blocked by the seal portion is maintained. Thereby, it is possible to prevent the liquid from flowing into the air cylinder through the air passage from the gas-liquid mixing chamber side by the seal portion.

Further, the other stem may be provided with an overhanging portion that protrudes toward the one stem and contacts and separates the seal portion.
According to this structure, the sealing performance between the upper stem and the lower stem can be ensured.

Further, the upward movement of the upper stem with respect to the lower stem may be restricted.
According to this configuration, even when the air piston rises with respect to the lower stem due to, for example, an increase in the internal pressure of the air cylinder, the close contact state between the seal portion and the other stem is maintained. become. That is, since the state where communication between the gas-liquid mixing chamber through the air passage and the inside of the air cylinder is blocked by the seal portion is maintained, the liquid flows into the air cylinder from the gas-liquid mixing chamber side through the air passage. This can be more reliably prevented by the seal portion.

  According to the former dispenser concerning the present invention, it can control that a liquid solidifies on a foaming member.

It is a longitudinal cross-sectional view of the discharge container in embodiment. It is a principal part enlarged view of FIG. It is explanatory drawing for demonstrating the effect | action of a former dispenser, Comprising: It is a longitudinal cross-sectional view corresponded in FIG. It is a principal part enlarged view of FIG. It is explanatory drawing for demonstrating the effect | action of a former dispenser, Comprising: It is a longitudinal cross-sectional view corresponded in FIG. It is explanatory drawing for demonstrating the effect | action of a former dispenser, Comprising: It is a longitudinal cross-sectional view corresponded in FIG. It is a principal part enlarged view of FIG. It is a principal part enlarged view which shows the other structure of a former dispenser. It is a principal part enlarged view which shows the other structure of a former dispenser.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
A discharge container 1 shown in FIG. 1 includes a container body 2 in which liquid is stored, a pump 3 having a stem 16 erected on the mouth portion 2a of the container body 2 so as to be movable downward in an upward biased state, and the stem. And a former dispenser 10 having a pressing head 20 disposed at the upper end of 16 and having nozzle holes 33 formed therein, and discharges the liquid in the container body 2 in the form of bubbles.

  The pump 3 includes a mounting cap 11, an air cylinder 12, a liquid cylinder 13, a liquid piston 14, a first urging member 15 a and a second urging member 15 b, a stem 16, and an air piston 17. And a foam member 18 and a gas-liquid mixing chamber 19.

Here, the air cylinder 12, the liquid cylinder 13, the liquid piston 14, and the air piston 17 are formed in a cylindrical shape. The central axes of the air cylinder 12, the liquid cylinder 13, the liquid piston 14, and the air piston 17 are located on a common axis and are arranged coaxially with the axis of the container body 2.
Hereinafter, this common axis is referred to as the axis O, the direction along the axis O is referred to as the vertical direction, the bottom side of the container body 2 along the vertical direction is referred to as the lower side, and the opposite side of the lower side is referred to as the upper side. Further, in a plan view viewed from the up and down direction, a direction orthogonal to the axis O is referred to as a radial direction, and a direction around the axis O is referred to as a circumferential direction.

  The mounting cap 11 is screwed into the mouth portion 2 a of the container body 2, and the upper cylinder portion is formed with a smaller diameter than the lower cylinder portion 21 and extends upward from the lower cylinder portion 21. 22 and a connecting step portion 23 for connecting the lower cylinder portion 21 and the upper cylinder portion 22 to each other.

The pressing head 20 includes an outer cylinder 31 into which the upper cylinder portion 22 of the mounting cap 11 enters inward along with the downward movement thereof, an inner cylinder 32 disposed on the inner side of the outer cylinder 31 and mounted on the stem 16, A nozzle cylinder 34 extending radially outward from the cylinder 32 and having a nozzle hole 33 formed at the tip thereof, covering the upper end opening of the outer cylinder 31, and the outer cylinder 31, the inner cylinder 32 and the nozzle cylinder 34 And a protruding tube 36 extending coaxially with the axis O from the top plate 35 downward.
The inner cylinder 32 extends below the outer cylinder 31, and the lower part thereof is inserted into the upper cylinder part 22. Note that the inner diameter of the upper part of the inner cylinder 32 is smaller than that of the lower part.

  The stem 16 is erected on the mouth portion 2a of the container body 2 so as to be movable downward in an upward biased state. The stem 16 includes an upper stem 41 in which the inner cylinder 32 of the pressing head 20 is externally fitted to the upper end portion, and a lower stem 42 extending downward from the upper stem 41.

The upper stem 41 has a length along the vertical direction shorter than the inner cylinder 32 of the pressing head 20, and the entire upper stem 41 is fitted in the inner cylinder 32. Specifically, the upper stem 41 has a small diameter portion 43 fitted to the upper portion in the inner cylinder 32 and a large diameter portion fitted to the lower portion in the inner cylinder 32 and having an outer diameter larger than that of the small diameter portion 43. 44, a first seal portion 45 projecting from an intermediate portion in the vertical direction of the large diameter portion 44, and a second seal portion 46 projecting from the lower end edge of the large diameter portion 44.
Each of the seal portions 45 and 46 extends radially inward as it goes downward, and its lower end edge is in close contact with the outer peripheral surface of the second lower stem 52 described later.

The lower stem 42 includes a first lower stem 51 linked to the liquid piston 14, and a second lower stem 52 linked to the air piston 17 and connecting the first lower stem 51 and the upper stem 41. ing.
The lower part of the first lower stem 51 is externally fitted to a small cylinder part 72 (described later) of the liquid piston 14, and an annular pedestal part 53 that protrudes radially inward is disposed on the upper part. In addition, a flange-shaped contact portion 54 that protrudes outward in the radial direction is disposed at an intermediate portion between the upper portion and the lower portion of the first lower stem 51.

  The second lower stem 52 has a base cylinder 55 whose upper part is inserted into the lower part of the upper stem 41, and a top-like cylindrical support that is erected upward at the upper end of the base cylinder 55 via an inner flange portion. Part 57.

At the lower part of the base tube 55, an overhanging portion 56 is formed that projects outward in the radial direction. The projecting portion 56 has a curved shape protruding outward in the radial direction in a longitudinal sectional view along the vertical direction, and bulges outward in the radial direction from the outer side to the inner side in the vertical direction. Further, a through hole 59 that penetrates the base tube 55 in the radial direction and communicates the inside and outside of the base tube 55 is formed in a portion of the base tube 55 that is positioned above the overhanging portion 56.
Of the seal portions 45 and 46 of the upper stem 41 described above, the first seal portion 45 is in close contact with a portion of the base tube 55 located above the through hole 59 so as to be slidable in the vertical direction. On the other hand, the second seal portion 46 of the upper stem 41 is in close contact with a portion of the base tube 55 located below the through hole 59 so as to be separated. Note that the second seal portion 46 is in close contact with the overhanging portion 56 in a standby state before the pressing head 20 is pressed, that is, when the upper stem 41 is in the raised end position. An annular groove 61 is formed between the second seal portion 46 and the inner cylinder 32 of the pressing head 20.

  Further, a communication hole 58 extending over the entire length in the vertical direction is formed in the peripheral wall portion of the support portion 57, and the inside of the second lower stem 52 and the inside of the upper stem 41 communicate with each other through this communication hole 58. doing.

  The air cylinder 12 extends downward from the mounting portion 63 and an annular mounting portion 63 sandwiched in the vertical direction between the connecting step portion 23 of the mounting cap 11 and the mouth portion 2 a of the container body 2. A peripheral wall portion 64 and an annular bottom wall portion 65 projecting radially inward from the peripheral wall portion 64.

  The liquid cylinder 13 is formed integrally with the air cylinder 12. The liquid cylinder 13 is connected to the base tube portion 66 extending downward from the inner peripheral edge of the bottom wall portion 65 of the air cylinder 12 and the lower end of the base tube portion 66 downward. The taper part 67 which is gradually reduced in diameter as it goes is provided with a hanging cylinder part 68 provided continuously from the lower end of the taper part 67 downward. A plurality of vertical ribs extending in the vertical direction are provided on the inner peripheral surface of the portion of the liquid cylinder 13 where the base tube portion 66 and the taper portion 67 are connected to each other at intervals in the circumferential direction.

  A liquid piston 14 is accommodated in the liquid cylinder 13 so as to be slidable in the vertical direction. The liquid piston 14 is linked to the stem 16. The liquid piston 14 is connected to the liquid cylinder 13 in a liquid-tight state so as to be slidable in the vertical direction, the lower end is connected to the large cylinder 71, and the upper part is fitted into the first lower stem 51. And a combined small cylinder portion 72.

  The second urging member 15 b urges the first lower stem 51 upward through the liquid piston 14. The second urging member 15 b is interposed between the portion of the liquid piston 14 where the large cylinder portion 71 and the small cylinder portion 72 are connected and the above-described vertical rib of the liquid cylinder 13. In addition, as the 2nd biasing member 15b and the 1st biasing member 15a mentioned above, a coil spring, a resin spring, etc. are employable, for example. Further, it is preferable that the second urging member 15b has a larger spring constant than that of the first urging member 15a.

  A rod-shaped valve member 73 is inserted into the liquid cylinder 13, the liquid piston 14, and the second urging member 15b. A hollow inverted conical upper valve body 73 a is formed at the upper end portion of the valve member 73, and a lower valve body 73 b is formed at the lower end portion of the valve member 73. The upper valve body 73a is seated on a valve seat formed at the upper end of the liquid piston 14 so as to be separated from above the valve seat. The lower valve body 73 b is spaced upward from the tapered portion 67 of the liquid cylinder 13 and is formed so as to be seated on the tapered portion 67. On the outer peripheral surface of the lower valve body 73b, a guide convex portion (not shown) disposed between the vertical ribs of the liquid cylinder 13 is projected.

  The air piston 17 is accommodated in the air cylinder 12 so as to be slidable up and down. The air piston 17 is linked to the stem 16. The air piston 17 includes an inner sliding cylinder part (cylinder part) 75 sheathed on the first lower stem 51, an outer sliding cylinder part 76 fitted in the air cylinder 12, and inner sliding thereof. And a connecting portion 77 that connects the cylindrical portion 75 and the outer sliding cylindrical portion 76.

  The lower part of the inner sliding cylinder part 75 is fitted to the sliding part located above the contact part 54 in the first lower stem 51 so as to be vertically slidable, and the upper part is The lower end of the inner cylinder 32 is fitted so as to be vertically slidable. And the lower end edge of the inner sliding cylinder part 75 is seated on the contact part 54 so as to be separated from above.

  The connecting portion 77 is formed in an annular shape that connects the central portions in the vertical direction of each of the inner sliding cylinder portion 75 and the outer sliding cylinder portion 76 over the entire circumference. The connecting portion 77 includes an upper chamber 78 a defined above the connecting portion 77 and a lower chamber 78 b defined below the connecting portion 77 in the air cylinder 12. , Through holes are formed.

  A valve cylinder portion 81 is fitted to a portion of the inner sliding cylinder portion 75 located below the portion connected to the connection portion 77. On the outer peripheral surface of the valve cylinder portion 81, an elastically deformable annular outside air introduction valve 81a that opens and closes the above-described through-hole is protruded. The outer peripheral edge portion of the outside air introduction valve 81a is in close contact with the lower surface of the connecting portion 77 so as to be separated.

As shown in FIG. 2, the foaming member 18 is disposed between the gas-liquid mixing chamber 19 and the nozzle hole 33 and foams the gas-liquid mixture transferred from the gas-liquid mixing chamber 19. The foam member 18 includes a casing 82 and a foam element 83.
The casing 82 is formed in a two-stage cylindrical shape having an upper side as a large diameter portion 82a and a lower side as a small diameter portion 82b. The large diameter portion 82 a is fitted in the base tube 55 of the second lower stem 52 described above, and the small diameter portion 82 b is fitted in the upper end portion of the first lower stem 51.

  In the illustrated example, two foaming elements 83 are provided, and both the foaming elements 83 are mounted in the casing 82 (large diameter portion 82a). Of the foam elements 83, the lower foam element 83 has a mesh body 83b stretched on the lower opening surface of the cylinder 83a, and the upper foam element 83 has a mesh on the upper opening face of the cylinder 83a. A body 83b is stretched.

  The gas-liquid mixing chamber 19 mixes the liquid transferred from the liquid cylinder 13 and the air transferred from the air cylinder 12. In the illustrated example, the gas-liquid mixing chamber 19 is provided in the upper end portion of the first lower stem 51. In the first lower stem 51, the gas-liquid mixing chamber 19 is a space between the above-described small diameter portion 82 b of the casing 82 and the upper surface of the pedestal portion 53. A spherical liquid discharge valve 19 a seated on the pedestal 53 is provided in the gas-liquid mixing chamber 19. The liquid discharge valve 19a is seated on the pedestal 53 so as to be separable.

Here, a connection path 85 is defined between the pressing head 20 and the stem 16 to connect the nozzle hole 33 of the pressing head 20 and the foam member 18. Specifically, the connection path 85 includes an upper and lower flow path 85a extending along the vertical direction, and a horizontal flow path 85b extending along the radial direction from the upper end of the vertical flow path 85a.
The vertical channel 85 a is defined by the upper stem 41 and the second lower stem 52, extends upward from the foam member 18, and is disposed coaxially with the axis O. That is, in the upper and lower flow paths 85a, the lower end opening is connected to the foam member 18, and the upper end opening is connected to the nozzle hole 33 via the horizontal flow path 85b.
The lateral flow path 85 b is configured by a portion located inside the nozzle cylinder 34 in the radial direction from the nozzle hole 33.

  The second lower stem 52 is provided with a closing body 87 that closes the upper end opening of the upper and lower flow path 85a so as to be openable and closable. The closing body 87 includes a bottomed cylindrical extending portion 88 extending coaxially with the axis O, and a valve body 89 disposed at the upper end of the extending portion 88.

  The extended portion 88 is loosely inserted into the upper stem 41, the lower end portion thereof is fixed to the top wall portion of the support portion 57 described above, the upper end portion is located in the nozzle cylinder 34 in the pressing head 20, and The above-described projecting cylinder 36 of the pressing head 20 is inserted inside. Further, in the extended portion 88, the above-described first urging member 15 a is interposed between the lower end edge of the protruding tube 36 and the bottom wall portion of the extended portion 88. The first urging member 15a urges both the upper stem 41 and the pressing head 20 upward via the protruding cylinder 36.

  The valve body 89 has a disk shape in a plan view as viewed from the up and down direction, and divides the inside of the connection path 85 into an upper and lower flow path 85a and a horizontal flow path 85b. The lower surface of the valve body 89 closes to the upper end edge of the upper stem 41 to close the upper and lower flow paths 85a. That is, the upward movement of the upper stem 41 of this embodiment with respect to the lower stem 42 (second lower stem 52) is regulated by the valve body 89.

  In the former dispenser 10 configured as described above, the gas-liquid mixing chamber 19 and the lower chamber 78b of the air cylinder 12 can communicate with each other through the air passage R. That is, the air passage R includes a first communication groove R1 formed on the outer peripheral surface of the casing 82 (small diameter portion 82b), a second communication groove R2 formed on the outer peripheral surface of the first lower stem 51, An intermediate passage R3 connecting between the first communication groove R1 and the second communication groove R2.

  The intermediate passage R3 is an outer peripheral space of the second lower stem 52 (a space defined by the inner cylinder 32, the upper stem 41, and the second lower stem 52 of the pressing head 20), and a lower end portion thereof is the second communication. The upper end portion communicates with the groove R2, and the upper end portion communicates with the first communication groove R1 through the through hole 59 described above. Further, in the intermediate passage R3, the above-described second seal portion 46 that partitions the inside of the intermediate passage R3 into the gas-liquid mixing chamber 19 side and the air cylinder 12 side is disposed. The second seal portion 46 prevents the liquid from flowing into the air cylinder 12 from the gas-liquid mixing chamber 19 side through the air passage R, and the second lower portion 46 when the air piston 17 descends due to the pressing head 20 being pressed down. The air passage R is separated from the overhanging portion 56 of the stem 52 to be communicated (details will be described later).

  The former dispenser 10 moves the stem 16 downward by depressing the pressing head 20, thereby transferring the liquid in the container body 2 and mixing it with air, and foaming these gas-liquid mixtures. A liquid (hereinafter referred to as a foam) is discharged from the nozzle hole 33.

  Next, the operation of the above-described former dispenser 10 will be described. In the former dispenser 10, the valve body 89 of the closing body 87 closes the upper end opening of the upper and lower flow path 85a in a standby state before the pressing head 20 is pressed.

  When the former dispenser 10 is used, the pressing head 20 is first pressed as shown in FIG. In the former dispenser 10, since the spring constant of the first urging member 15a is set smaller than the spring constant of the second urging member 15b as described above, the pressing head 20 and the upper stem 41 are provided with the first attachment. The second lower stem 52 descends against the urging force of the urging member 15a. At this time, the protruding cylinder 36 of the push-down head 20 enters the extending portion 88 of the closing body 87, and the upper stem 41 is separated downward from the valve body 89 of the closing body 87. The upper end opening of 85a is opened, and the upper and lower flow paths 85a and 85b communicate with each other.

  In the process in which the pressing head 20 and the upper stem 41 are lowered with respect to the second lower stem 52, the seal portions 45 and 46 of the upper stem 41 slide downward on the outer peripheral surface of the second lower stem 52. Move. Then, as shown in FIG. 4, by continuing to press down the pressing head 20, the second seal portion 46 gets over the protruding portion 56 of the second lower stem 52 and is separated from the outer peripheral surface of the second lower stem 52. . As a result, the gas-liquid mixing chamber 19 and the air cylinder 12 communicate with each other through the intermediate passage R3.

Thereafter, by continuing to press down the pressing head 20, the upper end edge of the extending portion 88 abuts against the top plate 35 of the pressing head 20 from below, so that the lowering of the pressing head 20 and the upper stem 41 with respect to the second lower stem 52 is restricted. (Regulated state)
Further, when the pressing head 20 and the upper stem 41 are lowered with respect to the second lower stem 52, the upper end portion of the inner sliding cylinder portion 75 in the air piston 17 is on the inner peripheral surface of the inner cylinder 32 in the pressing head 20. Slide. As a result, the upper end portion of the inner sliding cylinder portion 75 enters the annular groove 61 formed on the outer side of the second seal portion 46.

Next, as shown in FIG. 5, when the pressing head 20 is further pressed from the restricted state, the pressing head 20, the stem 16, and the liquid piston 14 are integrally pushed down.
At this time, the inner sliding cylinder portion 75 of the air piston 17 slides on the outer peripheral surface of the above-described sliding portion of the first lower stem 51, and the upper end portion of the inner sliding cylinder portion 75 is the pressing head 20 ( It slides on the inner peripheral surface of the inner cylinder 32). Thereby, the upper end edge of the inner sliding cylinder part 75 hits the top surface of the annular groove 61, and the vertical position of the air piston 17 is maintained. As a result, a communication gap Ra that communicates the air passage R and the lower chamber 78b is formed between the contact portion 54 of the first lower stem 51 and the lower end edge of the inner sliding cylinder portion 75 of the air piston 17. It is formed. At this time, the valve member 73 is also lowered, so that the lower valve body 73b is seated on the taper portion 67 of the liquid cylinder 13 and the lower end opening of the liquid cylinder 13 is closed. Note that the upper valve body 73a of the valve member 73 may be separated from the valve seat portion of the liquid piston 14 when the communication gap Ra is formed.

  After that, as shown in FIGS. 5 and 6, when the pressing head 20 is further pressed, the air piston 17 moves downward together with the pressing head 20, the stem 16 and the liquid piston 14, and the air piston 17 slides outward. The cylindrical portion 76 slides downward on the inner peripheral surface of the peripheral wall portion 64 of the air cylinder 12.

  At this time, the outside air introduction valve 81a remains in close contact with the lower surface of the connecting portion 77, and the through hole of the air piston 17 is closed. Thereby, the air in the lower chamber 78b is compressed, and this air is transferred toward the gas-liquid mixing chamber 19 through the communication gap Ra and the air passage R. Specifically, as shown in FIG. 7, the air that has flowed into the air passage R from the communication gap Ra flows upward in the second communication groove R2 of the air passage R. Then, the air flows from the second communication groove R2 into the intermediate passage R3, and then passes through the gap between the second seal portion 46 and the second lower stem 52 in the intermediate passage R3, and then passes through the through hole 59. It flows into one communication groove R1. The air that has flowed into the first communication groove R <b> 1 is transferred into the gas-liquid mixing chamber 19.

  At this time, as shown in FIGS. 5 and 6, the liquid piston 14 is moved downward while the second urging member 15 b is compressed and deformed with the lower end opening of the liquid cylinder 13 closed. Thus, the upper valve body 73a of the valve member 73 is separated from the valve seat portion of the liquid piston 14. Thereby, the inside of the liquid cylinder 13 and the inside of the first lower stem 51 communicate with each other, and the liquid in the liquid cylinder 13 passes between the valve seat portion and the upper valve body 73a and passes through the first lower stem 51. It is transferred to the gas-liquid mixing chamber 19 inside.

  As described above, by pressing the pressing head 20, air and liquid are respectively transferred to the gas-liquid mixing chamber 19, and these are merged and mixed in the gas-liquid mixing chamber 19. This gas-liquid mixture is transferred to the foaming member 18 and is passed through the mesh body 83b of the lower foaming element 83 and the mesh body 83b of the upper foaming element 83 in order to be foamed to form a foam. It flows through the passage 85 and is discharged from the nozzle hole 33.

  Thereafter, when the pressing of the pressing head 20 is released, the pressing head 20 returns to the standby position (the rising end position of the upper stem 41) by the reverse operation of the above-described ejection. Specifically, when the pressing of the pressing head 20 is released, the liquid piston 14 is raised by the restoring force of the second urging member 15b. As a result, the valve seat portion of the liquid piston 14 contacts the upper valve body 73a of the valve member 73, whereby the communication between the inside of the liquid cylinder 13 and the inside of the first lower stem 51 is cut off, and the gas-liquid mixing is performed. The liquid transfer to the chamber 19 is stopped. Note that it is preferable to release the pressing of the pressing head 20 while putting a hand or the like on the top plate 35 of the pressing head 20.

  The stem 16 and the pressing head 20 are integrally lifted together with the liquid piston 14 thus rising, and the contact portion 54 of the stem 16 is in contact with the lower end edge of the inner sliding cylinder portion 75 of the air piston 17. By contacting, the communication between the lower chamber 78b through the air passage R and the gas-liquid mixing chamber 19 is blocked, and the transfer of air to the gas-liquid mixing chamber 19 is stopped. Thereafter, the piston 17 for air is pushed up together with the stem 16 and the pressing head 20 by the restoring force of the second urging member 15b, so that the inside of the lower chamber 78b is in a negative pressure state. Thereby, the outside air introduction valve 81a is elastically deformed downward, and the through hole of the air piston 17 is opened. Thereby, outside air is supplied into the lower chamber 78b through the through hole and the upper chamber 78a.

  After the second urging member 15b is restored, the pressing head 20 and the upper stem 41 are raised relative to the lower stem 42 by the restoring force of the first urging member 15a. In the process in which the upper stem 41 rises toward the raised end position, the first seal portion 45 of the upper stem 41 rises while sliding on the outer peripheral surface of the second lower stem 52. On the other hand, the second seal portion 46 of the upper stem 41 rises in a state of being separated from the outer peripheral surface of the second lower stem 52 and then comes into close contact with the second lower stem 52 when it reaches the overhang portion 56. . As a result, the inside of the intermediate passage R3 is divided into the gas-liquid mixing chamber 19 side and the air cylinder 12 side, and the communication between the gas-liquid mixing chamber 19 side and the air cylinder 12 through the intermediate passage R3 is blocked. The

  Thereafter, when the upper stem 41 reaches the ascending end position, the lower surface of the valve body 89 is brought into close contact with the upper end edge of the upper stem 41, whereby the vertical flow path 85a is closed and the upper side of the second lower stem 52 is raised. The upward movement of the stem 41 is restricted. Thereby, the pressing head 20 returns to the standby state shown in FIG.

  As described above, according to the present embodiment, since the second lower stem 52 is provided with the closing body 87 that closes the upper end opening of the upper and lower flow path 85a, the nozzle in the standby state before the pressing head 20 is pressed. It is possible to suppress the foam member 18 from being exposed to the outside air through the hole 33 and the upper end opening. As a result, it is possible to prevent the liquid from drying and solidifying on the foaming member 18, and for example, it is possible to maintain stable foaming of suitable foam quality.

Here, in the present embodiment, since the second seal portion 46 that is detachably in contact with the second lower stem 52 is disposed on the upper stem 41, for example, the discharge container 1 is placed in a high temperature environment or the like, When the internal pressure of the air cylinder 12 rises and the air piston 17 rises with respect to the first lower stem 51, the inner sliding cylinder portion 75 of the air piston 17 moves away from the contact portion 54, and the air Even if the passage R communicates with the air cylinder 12 through the communication gap Ra, the communication between the gas-liquid mixing chamber 19 side and the air cylinder 12 side of the air passage R is blocked by the second seal portion 46. maintain. Accordingly, the second seal portion 46 can prevent the liquid from flowing into the air cylinder 12 through the air passage R from the gas-liquid mixing chamber 19 side.
In addition, in the present embodiment, since the overhanging portion 56 that is in close contact with the second seal portion 46 is disposed on the second lower stem 52, the sealing performance between the upper stem 41 and the second lower stem 52 is ensured. it can.

  In the present embodiment, the upward movement of the upper stem 41 with respect to the second lower stem 52 is regulated by the valve body 89, so that even when the air piston 17 rises with respect to the first lower stem 51. Thus, the close state between the second seal portion 46 and the second lower stem 52 is maintained. Thus, the second seal portion 46 can more reliably prevent the liquid from flowing into the air cylinder 12 through the air passage R from the gas-liquid mixing chamber 19 side.

  As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.

For example, in the above-described embodiment, the configuration in which the connection path 85 includes the upper and lower flow paths 85a and the horizontal flow path 85b has been described. However, the connection path 85 may have at least the upper and lower flow paths 85a.
In the above-described embodiment, the configuration in which the lower stem 42 includes the first lower stem 51 and the second lower stem 52 has been described, but the configuration is not limited thereto.
In the above-described embodiment, the configuration in which the upper stem 41 is fitted in the inner cylinder 32 of the pressing head 20 has been described. However, the present invention is not limited thereto, and the inner cylinder 32 and the upper stem 41 are integrally formed. It doesn't matter.

Further, in the above-described embodiment, the configuration in which the seal portions 45 and 46 are disposed on the upper stem 41 and the seal portions 45 and 46 are in close contact with the second lower stem 52 has been described, but the present invention is not limited thereto. For example, as shown in FIG. 8, seal portions 145 and 146 that are in close contact with the upper stem 41 may be disposed on the second lower stem 52 side.
The first seal portion 145 extends radially outward as it goes upward, and its upper end edge is in close contact with the inner peripheral surface of the upper stem 41 so as to be vertically slidable.

On the other hand, the second seal portion 146 extends outward in the radial direction as it goes downward, and its lower end edge is in close contact with the inner peripheral surface of the upper stem 41 so as to be separable. Note that when the upper head 41 is in the standby state before the pressing head 20 is pressed, that is, when the upper stem 41 is in the raised end position, the second seal portion 146 bulges from the lower end portion of the upper stem 41 toward the inside in the radial direction. Close to the exit 156.
Then, as shown in FIG. 9, when the pressing head 20 is pressed, the second seal portion 146 is separated from the overhanging portion 156 of the upper stem 41, and the inside of the gas-liquid mixing chamber 19 and the air cylinder are passed through the intermediate passage R3. The inside of 12 communicates.

  In addition, in the range which does not deviate from the meaning of this invention, it is possible to replace suitably the component in the embodiment mentioned above by the known component, and you may combine the modification mentioned above suitably.

DESCRIPTION OF SYMBOLS 2 ... Container body 2a ... Port part 3 ... Pump 10 ... Former dispenser 12 ... Air cylinder 13 ... Liquid cylinder 14 ... Liquid piston 16 ... Stem 17 ... Air piston 18 ... Foam member 19 ... Gas-liquid mixing chamber 20 ... Pressing head 33 ... Nozzle hole 41 ... Upper stem 42 ... Lower stem 46 ... Second seal part (seal part)
56, 156 ... overhang 75 ... inner sliding cylinder (cylinder)
85 ... Connection path 85a ... Upper / lower flow path 87 ... Occlusion body R ... Air passage

Claims (3)

A pump having a stem erected at the mouth of the container body in which the liquid is accommodated in an upwardly biased state; and
A presser head disposed at the upper end of the stem and having a nozzle hole formed therein,
The pump includes
A liquid piston and an air piston linked to the stem;
A liquid cylinder in which the liquid piston is housed slidably up and down;
An air cylinder in which the air piston is housed slidably up and down;
A gas-liquid mixing chamber for mixing the liquid from the liquid cylinder and the air from the air cylinder;
An air passage communicating between the air cylinder and the gas-liquid mixing chamber;
A foam member for foaming the gas-liquid mixture from the gas-liquid mixing chamber,
The stem is
An upper stem to which the pressing head is attached;
A lower stem extending downward from the upper stem,
The upper stem is supported to be movable downward in an upward biased state with respect to the lower stem,
Between the nozzle hole and the foaming member, a connection path having a vertical channel extending in the vertical direction is disposed,
The lower stem is provided with a closing body that is erected upward and closes an upper end opening of the upper and lower flow path,
As the upper stem descends relative to the lower stem, the closure opens the upper end opening,
The air piston includes a cylindrical portion through which the lower stem is inserted,
The lower stem is formed with a flange-like contact portion that protrudes outward in the radial direction of the lower stem and contacts the lower end of the cylindrical portion from below the cylindrical portion,
A part of the air passage is formed between the tube portion and the lower stem,
One of the upper stem and the lower stem is provided with a seal portion in close contact with the other stem so as to be separable,
The seal portion cuts off the communication between the gas-liquid mixing chamber and the air cylinder through the air passage, and is separated from the other stem by pressing of the pressing head, and passes through the air passage. A former dispenser characterized in that a gas-liquid mixing chamber and the air cylinder are communicated with each other.   The former dispenser according to claim 1, wherein the other stem is provided with an overhanging portion that protrudes toward the one stem and contacts and separates the seal portion.   The former dispenser according to claim 1 or 2, wherein the upper stem is restricted from moving upward with respect to the lower stem.

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