WO2023048141A1

WO2023048141A1 - Cap

Info

Publication number: WO2023048141A1
Application number: PCT/JP2022/034989
Authority: WO
Inventors: 元佐々木; 庄治植平; 悟市川
Original assignee: 東京ライト工業株式会社
Priority date: 2021-09-22
Filing date: 2022-09-20
Publication date: 2023-03-30

Abstract

A boss (51) on which a valve seat (72) for a check valve (71) is formed and a nozzle (61) are arranged by being offset in the radial direction of the boss (51). The boss (51) is provided on a lower surface (32) of a ceiling part (31) of a cap body (21), and the nozzle (61) is provided on an upper surface (33) of the ceiling part (31). Therefore, the elements excluding the check valve (71) can be integrally molded, and a cap (1) can be configured by the two components of the cap body (21) and a valve body (81) of the check valve (71). In this way, the manufacturing cost of the cap (1) can be reduced.

Description

cap

The present invention relates to a cap attached to the mouth of a container containing contents.

Patent Document 1 discloses a container configured to discharge an appropriate amount of contents from a nozzle of a cap by pressurizing and deforming the container body.

Japanese Patent Application Laid-Open No. 2020-200077

The cap 11 (hereinafter referred to as the “conventional cap”) described in Patent Document 1 has a check valve 53 and a base 81 formed by the bottom wall 64 of the base portion 51 of the cap main body 41 and the cylindrical portion 73 of the discharge nozzle 52. It is clamped and fixed to the valve chamber 54 . That is, the cap body 41, the discharge nozzle 52, and the check valve 53 are separately configured in the cap 11. As shown in FIG. As described above, the conventional cap is composed of at least three parts, which increases the number of parts and increases the manufacturing cost. In addition, productivity decreases due to an increase in the number of assembly man-hours.

In the conventional cap, the check valve 53 divides the valve chamber 54 into the bottom wall 64 side (upstream chamber) and the nozzle 72 side (downstream chamber). When air remaining on the nozzle 72 side (downstream chamber) of the valve chamber 54 is involved in the contents, air bubbles are generated in the contents flowing out from the nozzle 72 . The generation of such air bubbles hinders the smooth outflow of the content (liquid) when a small amount of content (liquid) is to be poured out, and there is also a concern that the air bubbles may pop and stain the surroundings.

An object of the present invention is to reduce the manufacturing cost of a cap provided with a check valve and to suppress the generation of air bubbles in the contents flowing out from a nozzle.

The invention described in claim 1 comprises a cap body attached to the mouth of a container, and an annular valve body of a check valve that allows contents to flow from the inside of the container to the outside of the container. includes a ceiling portion that closes the opening of the container opening, a boss that protrudes from the center of the lower surface of the ceiling portion, a seal holding portion that is provided on the outer periphery of the lower surface of the ceiling portion, and a lower surface of the ceiling portion. a nozzle having a discharge passage opening between the boss and the seal holding portion and protruding upward from the ceiling portion; The valve body includes an outer edge portion held liquid-tight by the seal holding portion provided outside the lower end opening of the nozzle, and the boss slidably inserted therein. an annular valve portion that is removably seated on the valve seat; an annular valve portion formed integrally with the valve portion and the outer edge portion; and a partition wall for urging the valve portion in the valve closing direction, wherein opening of the check valve causes the upstream chamber and the downstream chamber to move between the boss and the valve body. characterized in that it is communicated by a flow path provided in the.
Since the cap according to claim 1 is composed of two parts, the cap main body and the valve body of the check valve, the number of constituent parts is small, and the manufacturing cost can be reduced. Also, since the number of assembling man-hours is reduced, productivity can be improved.

The invention recited in claim 2 is characterized in that the flow path extends from a certain height from the valve seat to the proximal end of the boss.
In the cap according to claim 2, the content corresponding to the increase in the volume of the downstream chamber from the time when the communication between the upstream chamber and the downstream chamber is cut off until the valve portion of the valve body is seated on the valve seat However, since the contents are sucked from the inside of the nozzle into the downstream chamber, the contents do not remain in the nozzle after use, and it is possible to prevent dripping and adhesion of the contents around the nozzle.

In the invention recited in claim 3, an annular groove extending in the circumferential direction via an annular step is provided on the outer periphery of the base end of the boss, and one end of the nozzle opens at the bottom of the annular groove. It is characterized by
In the cap according to claim 3, the content that has passed through the flow path from the upstream chamber and is jetted to the downstream chamber collides with the annular stepped portion and is not directly introduced into the nozzle. It is possible to prevent the ink from being discharged well.

In the invention described in claim 4, the nozzle outflow path is opened at a position deviated from the center of the cap body on the lower surface of the ceiling portion, and the outflow path is opened with respect to the center of the cap body. A concave portion for an air reservoir is provided on the side opposite to the opening.
In the cap according to claim 4, when the container is tilted with the nozzle facing downward, the air remaining in the downstream chamber accumulates in the concave portion at the top of the downstream chamber. It is possible to suppress being caught. As a result, it is possible to prevent bubbles from being generated in the content flowing out from the nozzle.

The invention recited in claim 5 is the cap according to claim 4, wherein a first communication passage that communicates between the upstream chamber and the downstream chamber is provided at the center of the lower surface of the ceiling portion, A second communication path communicating between the first communication path and the outflow path is provided on the lower surface of the ceiling portion.
In the cap according to claim 5, when the container is tilted, the contents flowing through the first communication passage at the center of the lower surface of the ceiling are preferentially guided to the outflow passage via the second communication passage, so that the content flows into the downstream chamber. Entrainment of remaining air into the contents can be further suppressed. Thereby, it is possible to more effectively prevent the generation of air bubbles in the content flowing out from the outlet of the nozzle.

According to the present invention, it is possible to reduce the manufacturing cost and suppress the generation of air bubbles in the contents flowing out from the nozzle in the cap provided with the check valve.

FIG. 4 is an explanatory view of the first embodiment, and is a cross-sectional view of the cap attached to the mouth of the container, taken along an axial plane; FIG. 2 is an explanatory diagram of the first embodiment and a plan view of the valve body; FIG. FIG. 3 is a cross-sectional view taken along the line BB in FIG. 2; FIG. 2 is an enlarged view of the main part in FIG. 1 and is a view for explaining the operation of the check valve; 2 is an enlarged cross-sectional view taken along the line AA in FIG. 1; FIG. It is a figure explaining the effect|action of 1st Embodiment, and is a figure which shows the state which inclined the container. FIG. 4B is a view for explaining the operation of the first embodiment, and shows a state when the valve portion of the valve body of the check valve is positioned at the top dead center H2 and the check valve is opened. FIG. 8 is a diagram for explaining the operation of the first embodiment, and shows a state in which the valve portion of the valve element of the check valve is returned to the valve open position H1 from the state shown in FIG. 7; FIG. 9 is a diagram for explaining the operation of the first embodiment, showing a state in which the valve body of the check valve is seated on the valve seat from the state shown in FIG. 8 and the contents in the nozzle are sucked toward the downstream chamber; It is a figure which shows. FIG. 10 is an explanatory view of the second embodiment, and is a cross-sectional view of the cap attached to the mouth of the container taken along the axial plane; 11 is an enlarged CC cross-sectional view in FIG. 10; FIG. FIG. 12 is a diagram showing another form of the air reservoir corresponding to FIG. 11; It is a figure explaining the effect|action of 2nd Embodiment, and is a figure which shows the state which inclined the container. FIG. 4 is a diagram showing a state in which the check valve is opened with the valve portion of the valve body of the check valve positioned at the top dead center H2; 15 is a diagram showing a state in which the valve portion of the valve body of the check valve is returned to the valve open position H1 from the state shown in FIG. 14; FIG. 16 is a diagram showing a state in which the valve portion of the valve element of the check valve is seated on the valve seat and the contents in the nozzle are sucked toward the downstream chamber from the state shown in FIG. 15; FIG.

A first embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 1, the cap 1 is attached to a mouth portion 11 of a squeeze container 10 (hereinafter referred to as "container 10") made of polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), or the like. The cap 1 is composed of a cap main body 21 and a valve body 81 of a check valve 71 which will be described later. A synthetic resin such as polypropylene (PP) is used for the cap 1, for example.

The cap body 21 includes a disk-shaped ceiling portion 31 that closes the upper end opening of the mouth portion 11 (hereinafter referred to as “mouth portion 11”) of the container 10, and is provided on the outer peripheral edge of the ceiling portion 31. It has an outer cylindrical portion 41 fitted to the outside, and an inner cylindrical portion 45 provided on the lower surface 32 of the ceiling portion 31 and fitted to the inside of the mouth portion 11 . When the cap body 21 is fitted to the mouth portion 11 of the container 10 , the annular protrusion 12 that protrudes radially outward from the mouth portion 11 abuts against the inner peripheral surface 42 of the outer cylindrical portion 41 . On the other hand, the annular recessed portion 13 that is recessed radially inward of the mouth portion 11 abuts against the outer peripheral surface 47 of the inner cylinder portion 45 .

The annular projection 13 is provided in the vicinity of the opening of the mouth portion 11, and the annular projection 12 is provided at an intermediate position in the axial direction ("vertical direction" in FIG. 1) of the mouth portion 11. An inner peripheral surface 42 of the outer cylindrical portion 41 is provided with an annular protrusion 43 that engages with the annular projection 12 of the mouth portion 11 and prevents movement of the cap main body 21 in the removal direction from the mouth portion 11 .

A cylindrical boss 51 with an open tip protrudes from the center (center) of the lower surface 32 of the ceiling portion 31 . Also, the lower end of the discharge passage 62 formed in the nozzle 61 opens to the lower surface 32 of the ceiling portion 31 . The nozzle 61 has a cylindrical portion 63 that protrudes axially upward from the top surface of the ceiling portion 31 and a discharge port 64 that expands axially upward from the upper end of the cylindrical portion 63 . The opening 65 of the nozzle 61 is drilled outside the boss 51 of the ceiling portion 31 . The boss 51 is arranged coaxially with the outer cylinder portion 41 and the inner cylinder portion 45 . An annular step portion 35 having a step with respect to the lower surface 32 of the ceiling portion 31 is provided on the outer edge portion of the boss 51 on the base end side.

The cap body 21 has a lid body 22 that covers the upper surface 33 of the ceiling portion 31 . The lid body 22 is connected to the outer cylindrical portion 41 via hinges 23 . The hinge 23 is provided on the opposite side of the nozzle 61 with respect to the boss 51 (at the farthest position from the nozzle 61). An annular projection 24 is provided on the inner edge of the opening of the lid 22 to engage with an annular claw 34 provided on the outer edge of the upper end of the ceiling portion 31 . The lid body 22 has an inner cylindrical portion 25 positioned coaxially with the cap body 21 in a closed state. The lower end of the inner cylindrical portion 25 abuts on the upper surface 33 of the ceiling portion 31 near the inside of the claw portion 34 . The lid 22 has a plug 26 provided inside the inner cylindrical portion 25 . The plug 26 closes the outlet 64 of the nozzle 61 when the lid 22 is closed.

The cap 1 has a check valve 71 that allows the content 2 (see FIG. 6) to flow from inside the container 10 to the nozzle 61 (outside the container 10). The check valve 71 is composed of an annular valve body 81 and an annular valve seat 72 on which a valve portion 91 of the valve body 81 is removably seated. As shown in FIG. 4 , the valve seat 72 is formed on the upper side (the surface on the ceiling portion 31 side) of the annular lip portion 52 provided on the outer edge of the opening of the boss 51 . The valve seat 72 is formed into a concave curved surface. The upper end of the valve seat 72 smoothly continues to the outer peripheral surface 53 of the boss 51 .

The outer peripheral surface 53 of the boss 51 is provided with a plurality of grooves 54 ("eight grooves" in the first embodiment, see FIG. 5) that form flow passages 73 to be described later. The plurality of grooves 54 extend in the axial direction (“vertical direction” in FIG. 4) at equal intervals in the circumferential direction of the boss 51 and at a constant depth. Each groove 54 extends from the annular surface 36 of the annular stepped portion 35 to a position at a constant height H1 (hereinafter "valve opening point H1", see FIG. 4) from the valve seat 72. As shown in FIG. The lower end of each groove 54 is formed into a gently curved surface 55 and gradually reaches the outer peripheral surface 53 of the boss 51 .

2 and 3, the valve body 81 is formed in a substantially disc shape having a through hole 95 in the center into which the boss 51 is inserted, and the through hole 95 is formed in the edge on the inner peripheral side. It is composed of an annular valve portion 91 , an annular seal portion 82 having a substantially rectangular vertical cross section, and an annular partition wall portion 85 formed between the valve portion 91 and the seal portion 82 . The seal portion 82 is liquid-tightly held by an annular seal holding groove 83 formed between the inner tubular portion 45 and the annular rib 37 provided inside the inner tubular portion 45 . The valve portion 91 has a substantially trapezoidal vertical cross section, and an inner peripheral surface 94 is formed between the inner edge of the upper surface 92 and the inner edge of the lower surface 93 . An inner peripheral surface 94 of the valve portion 91 is formed as an inclined surface whose diameter is reduced from the upper surface 92 to the lower surface 93 .

A through hole 95 (seal surface) is formed in the ridge between the lower surface 93 and the inner peripheral surface 94 of the valve portion 91 . The through hole 95 (seal surface) is axially movable with respect to the outer peripheral surface 53 of the boss 51 while maintaining liquid tightness with the outer peripheral surface 53 . The partition wall portion 85 has a spring portion 86 that generates a pressing force that urges the valve portion 91 downward toward the valve seat 72 . The partition wall portion 85 communicates the inside of the inner cylindrical portion 45 (the inside of the mouth portion 11 of the container 10 ) with the upstream chamber 3 on the side of the container body 15 (“lower side” in FIG. 1 ) and the discharge path 62 of the nozzle 61 on the downstream side. It is partitioned into a room 4.

Referring to FIG. 4, a check valve 71 composed of a valve body 81 and a valve seat 72 is configured such that when the valve portion 91 of the valve body 81 is positioned at the bottom dead center H0, that is, the valve portion 91 is positioned at the valve seat. 72 (when the sealing surface is in close contact with the seating surface of the valve seat 72), communication between the upstream chamber 3 on the container body 15 side and the downstream chamber 4 on the nozzle 61 side is cut off. While the through hole 95 (seal surface) of the valve portion 91 moves (sliding) on the outer peripheral surface 53 of the boss 51 from the bottom dead center H0 to the valve opening point H1 while maintaining liquid tightness, the valve portion 91 and the upstream chamber 3 are separated. Communication with the downstream chamber 4 remains blocked.

During the period from when the valve portion 91 reaches the valve opening point H1 until it reaches the top dead center H2, in other words, the through hole 95 (seal surface) of the valve portion 91 faces the groove 54 of the boss 51. Meanwhile, a plurality of flow paths 73 (see FIG. 5) are formed between the valve portion 91 and the boss 51, thereby allowing the upstream chamber 3 and the downstream chamber 4 to communicate with each other. By changing the flow area of the plurality of flow paths 73, the discharge amount of the contents 2 discharged from the nozzle 61 can be adjusted. Further, the position of the top dead center H2 of the valve portion 91 is determined by a plurality of protrusions 96 (only "two" are shown in FIG. 1) provided on the annular surface 36 of the annular stepped portion 35. Determined by abutment. Furthermore, the plurality of protrusions 96 are arranged at regular intervals on a circle coaxial with the boss 51 .

As shown in FIG. 1 , an annular groove 5 that is coaxial with the boss 51 is provided on the lower surface 32 side of the ceiling portion 31 . Annular groove 5 is formed between annular step 35 and rib 37 . On the bottom surface 6 of the annular groove 5 located on the lower surface 32 of the ceiling portion 31, there are a plurality of grooves (only "one" is shown in FIG. 1) that restrict the movement of the partition wall portion 85 of the valve body 81 toward the downstream chamber 4 side. is provided. A plurality of protrusions 7 are arranged at regular intervals on a circle coaxial with the boss 51 . The radius of the circle on which the protrusions 7 are arranged is larger than the radius of the concentric circle on which the protrusions 96 are arranged. Also, the opening 65 of the nozzle 61 is provided in the bottom surface 6 of the annular groove 5 and is arranged near the outer edge of the bottom surface 6 .

Next, a method for assembling the cap 1 described above will be described.
First, the seal portion 82 of the valve body 81 is inserted (press-fitted) into the seal holding groove 83 formed in the cap main body 21 . An annular protrusion 84 is provided on the inner peripheral surface 46 of the inner cylindrical portion 45 to prevent the seal portion 82 from slipping out of the seal holding groove 83 . Next, the diameter of the through hole 95 of the valve body 81 is increased so that the tip of the boss 51 is passed through the through hole 95 . At this time, since the tip of the boss 51 is formed into a semicircular curved surface in longitudinal section, the tip of the boss 51 can be passed through the through hole 95 without damaging the sealing surface of the valve part 91. - 特許庁This completes the attachment of the valve body 81 to the cap main body 21 . Either the step of inserting the seal portion 82 into the seal holding groove 83 or the step of penetrating the boss 51 into the through hole 95 may be performed first.

Next, operation of the cap 1 according to the first embodiment will be described.
For convenience, the downstream chamber 4 is defined as the space from the bottom surface 6 of the annular groove 5 formed in the ceiling portion 31 of the cap body 21 to the valve body 81 , in other words, the space where the discharge passage 62 of the nozzle 61 opens. Note that the container 10 accommodates a liquid content 2 such as a liquid seasoning or skin lotion.

When discharging the contents 2 contained in the container 10 from the nozzle 61 of the cap 1, first, the user opens the lid 22 of the cap body 11 to reveal the nozzle 61. The container 10 is then tilted as shown in FIG. 6 in order to dispense the contents 2 . In this state, the valve portion 91 of the valve body 81 of the check valve 71 is seated on the valve seat 72 by the biasing force of the partition wall portion 85, so that the upstream chamber 3 on the container body 15 side and the downstream chamber 4 on the nozzle 61 side Communication with is cut off.

Next, the user presses the container body 15 to dent the container body 15 . As a result, the pressure in the upstream chamber 3 increases, and the valve element 81 receives the pressure in the upstream chamber 3 , so that the valve portion 91 is separated from the valve seat 72 against the biasing force of the partition wall portion 85 . Here, the valve portion 91 moves the through hole 95 (seal surface) from the bottom dead center H0 (see FIG. 4) to the valve opening point H1 (see FIG. 4) while maintaining the liquid tightness of the outer peripheral surface 53 of the boss 51 . , the communication between the upstream chamber 3 and the downstream chamber 4 is still blocked.

When the container body 15 is further pressurized, the valve portion 91 passes through the valve opening point H1 and further reaches the top dead center H2 (see FIG. 4) to open the check valve 71 (see FIG. 7). As a result, the upstream chamber 3 and the downstream chamber 4 communicate with each other through a plurality of flow paths 73 (hereinafter referred to as "flow paths 73") formed between the valve body 81 (valve portion 91) and the boss 51. Then, the content 2 in the container 10 (upstream chamber 3 ) is discharged out of the container 10 from the discharge port 64 of the nozzle 61 via the channel 73 , the downstream chamber 4 , the opening 65 and the discharge passage 62 .

Here, the content 2 that has passed through the flow path 73 collides with the annular surface 36 of the annular stepped portion 35 and changes its direction radially outward ("leftward" in FIG. 7), and further flows through the discharge path 62. It passes through and is discharged from the discharge port 64 of the nozzle 61 . As described above, in the first embodiment, the content 2 ejected from the flow path 73 is received by the annular surface 36 of the annular stepped portion 35, so that the content 2 is vigorously ejected from the ejection port 64 of the nozzle 61. is suppressed.

Next, when the user releases the pressure applied to the container main body 15, the biasing force (returning force) of the partition wall portion 85 causes the valve portion 91 to move the through hole 95 (seal surface) to the outer peripheral surface 53 of the boss 51. It moves from the top dead center H2 toward the valve seat 72 while maintaining liquid tightness. When the valve portion 91 passes through the valve opening point H1 (the lower end of the groove 54 formed in the boss 51) (see FIG. 8), communication between the upstream chamber 3 and the downstream chamber 4 is cut off.

8 until the valve portion 91 of the valve body 81 is seated on the valve seat 72 shown in FIG. The content 2 corresponding to the volume increment flows (is sucked) from the discharge passage 62 to the downstream chamber 4 .

The cap 1 according to the first embodiment has the following effects.
In the conventional cap, the cap main body, the nozzle, and the check valve are separately configured, which increases the number of parts and increases the manufacturing cost. In addition, an increase in the number of assembly man-hours leads to a decrease in productivity.

On the other hand, in the cap 1 according to the first embodiment, the boss 51 on which the valve seat 72 of the check valve 71 is formed and the nozzle 61 are offset in the radial direction of the boss 51. is arranged outside the boss 51 provided in the center of the ceiling portion 31, it is possible to integrally mold elements other than the check valve 71, and the cap 1 is combined with the cap main body 21 and the valve of the check valve 71. It can be composed of two parts including the body 81 . As a result, the number of parts constituting the cap 1 is smaller than that of the conventional cap, and the manufacturing cost of the cap 1 can be reduced. Moreover, since the number of assembling man-hours is reduced, the productivity of the cap 1 can be improved.
Further, in the cap 1 according to the first embodiment, when the pressurization of the container body 15 is released, the content 2 in the nozzle 61 (discharge path 62) is sucked toward the downstream chamber 4 (container 10 side). Therefore, the content 2 does not remain in the nozzle 61 after use, and it is possible to prevent dripping and adhesion of the content 2 around the nozzle 61 .
Further, in the cap 1 according to the first embodiment, the discharge passage 62 (opening 65) is formed at a position displaced from the center of the ceiling portion 31, so that the annular stepped portion 35 can be formed on the outer circumference of the boss 51. As a result, the content 2 jetted from the upstream chamber 3 through the flow path 73 to the downstream chamber 4 collides with the annular surface 36 of the annular stepped portion 35 formed on the base end side of the boss 51. Since the direction of flow is changed by pressing, it is possible to prevent the content 2 from being vigorously discharged from the nozzle 61 . This has a simple structure and is easy to implement as compared with the conventional cap in which a baffle plate is installed at the opening (introduction port) of the nozzle.
In addition, in the cap 1 according to the first embodiment, by changing the flow area of the plurality of flow paths 73, in other words, by changing the number and shape of the grooves 54 formed in the boss 51, the liquid is discharged from the nozzle 61. The discharge amount of the contents 2 can be easily adjusted.

(Second embodiment)
Next, a second embodiment will be described with reference to FIGS. 10 to 16. FIG.
Note that the same designations and reference numerals are used for common parts with the first embodiment, and redundant explanations are omitted.

As shown in FIGS. 10 and 11 , a groove-shaped air reservoir 101 extending along the inner circumference of the rib 37 in an arc shape with a constant width and a constant depth is provided on the lower surface 38 of the central portion of the ceiling portion 31 . recesses) are formed. The air reservoir 101 is provided on the opposite side of the central lower surface 38 of the ceiling 31 from the opening 65 of the outflow passage 62 and at a certain distance from the boss 51 . In FIG. 11, assuming that the radius extending through the center of the opening 65 in the opposite direction to the radius of the circular central lower surface 38 is R0, one end wall 105 of the air reservoir 101 extends from the radius R0 in FIG. 90 degrees in the clockwise direction, and the other end wall 106 of the air reservoir 101 forms 90 degrees in the counterclockwise direction in FIG. 11 from the radius R0. In other words, the central angle of the air reservoir 101 is 180 degrees.

However, the central angle of the air reservoir 101 is not limited to 180 degrees, and can be set to 120 degrees, for example. In this case, one end wall 105 of the air reservoir 101 forms an angle of 60 degrees clockwise in FIG. 60 degrees in the direction of rotation. Further, in the second embodiment, the air reservoir 101 (the outer peripheral wall 102 and the inner peripheral wall 103) is formed in an arc shape (see FIG. 11), but as shown in FIG. 106 (see FIG. 11) may be provided on the same plane to form the air reservoir 101 .

As shown in FIGS. 10 and 11, a groove-shaped communication passage 39 extending with a constant width and a constant depth from the base end of the boss 51 to the opening 65 of the outflow passage 62 is provided on the lower surface 38 of the central portion of the ceiling portion 31 . (Second communication path) is formed. In the second embodiment, the depth of the communication path 39 is the same as the depth of the air reservoir 101 . Of the plurality of flow paths 73 (first communication paths), the flow path 73 formed between the boss 51 and the groove 54A is referred to as flow path 73A for convenience. Communicates with road 62 . The groove shape (flow path shape) of the communication path 39 can be semicircular, rectangular, or the like in a cross-sectional view taken along line DD in FIG.

In addition, a plurality of ("8" in the second embodiment) protrusions 7 are provided on the lower surface 38 of the central portion of the ceiling portion 31 to restrict the movement of the partition wall portion 85 of the valve body 81 toward the downstream chamber 4 side. . A plurality of protrusions 7 are arranged at regular intervals on a circle coaxial with the boss 51 . Among the plurality of protrusions 7 , four protrusions 7 on the side opposite to the opening 65 of the nozzle 61 (“right side” in FIG. 11 ) protrude from the bottom portion 104 of the air reservoir portion 101 . Also, the radius of the circle on which the protrusions 7 are arranged is larger than the radius of the concentric circle on which the protrusions 96 are arranged.

Next, the action of the cap 1 according to the second embodiment will be described.
Note that the container 10 accommodates a liquid content 2 such as a liquid seasoning or skin lotion. When the content 2 contained in the container 10 is to flow out from the nozzle 61 of the cap 1, first, the user opens the lid 22 of the cap body 11 to reveal the nozzle 61. As shown in FIG. The container 10 is then tilted as shown in FIG. 13 to allow the contents 2 to flow out. In this state, the valve portion 91 of the valve body 81 of the check valve 71 is seated on the valve seat 72 by the biasing force of the partition wall portion 85, so that the upstream chamber 3 on the container body 20 side and the downstream chamber 4 on the nozzle 61 side Communication with is cut off.

Next, the user presses the container body 20 to dent the container body 20 . As a result, the pressure in the upstream chamber 3 increases, and the valve element 81 receives the pressure in the upstream chamber 3 , so that the valve portion 91 is separated from the valve seat 72 against the biasing force of the partition wall portion 85 . Here, the valve portion 91 moves the through hole 95 (seal surface) from the bottom dead center H0 (see FIG. 4) to the valve opening point H1 (see FIG. 4) while maintaining the liquid tightness of the outer peripheral surface 53 of the boss 51 . , the communication between the upstream chamber 3 and the downstream chamber 4 is still blocked.

When the container body 20 is further pressurized, the valve portion 91 passes through the valve opening point H1 and further reaches the top dead center H2 (see FIG. 4) to open the check valve 71 (see FIG. 14). As a result, the upstream chamber 3 and the downstream chamber 4 are communicated with each other through a plurality of flow paths 73 (first communication paths) formed between the valve body 81 (valve portion 91) and the boss 51. Contents 2 in (upstream chamber 3 ) flow out of container 10 from outlet 64 of nozzle 61 via multiple flow paths 73 , downstream chamber 4 , opening 65 , and outflow path 62 .

Here, the content 2 that has passed through the plurality of flow paths 73 collides with the base end outer edge of the boss 51 on the lower surface 38 of the central portion of the ceiling portion 31, and changes direction radially outward. , and further flows out from the outlet 64 of the nozzle 61 through the outlet passage 62 . As described above, in the second embodiment, the content 2 jetted from the plurality of flow paths 73 is received by the lower surface 38 of the central portion of the ceiling portion 31, so that the flow direction of the content 2 is changed from the axial direction to the radial direction. , the content 2 is restrained from being vigorously discharged from the outlet 64 of the nozzle 61.例文帳に追加

In addition, in the second embodiment, the air reservoir 101 (recess) is formed on the side opposite to the opening 65 of the outflow passage 62 on the lower surface 38 of the central portion of the ceiling 31. Therefore, as shown in FIG. When the container 10 is tilted, the air remaining in the downstream chamber 4 accumulates in the air reservoir 101 located at the top (high position) of the downstream chamber 4 when the container 10 is tilted. As a result, it is possible to suppress the air remaining in the downstream chamber 4 from being caught in the contents 2 flowing through the plurality of flow paths 73 and flowing through the outflow path 62 . It is possible to prevent air bubbles from being generated in the outflowing contents 2 .

Furthermore, in the second embodiment, the communication path 39 (second communication path) that communicates between the flow path 73A (see FIG. 11) and the outflow path 62 is provided in the lower surface 38 of the central portion of the ceiling portion 31. is tilted, the contents 2 ejected from the flow path 73A positioned at the lower portion (lower position) of the downstream chamber 4 can be preferentially guided to the outflow path 62. As a result, it is possible to further suppress the entrainment of the air remaining in the downstream chamber 4 into the contents 2, and the generation of air bubbles in the contents 2 flowing out from the outlet 64 of the nozzle 61 can be more effectively prevented. can be effectively prevented.

Next, when the user releases the pressurizing force of the container body 20, the urging force (returning force) of the partition wall portion 85 causes the valve portion 91 to move the through hole 95 (seal surface) to the outer peripheral surface 53 of the boss 51. It moves from the top dead center H2 toward the valve seat 72 while maintaining liquid tightness. When the valve portion 91 passes through the valve opening point H1 (the lower end of the groove 54 formed in the boss 51) (see FIG. 15), communication between the upstream chamber 3 and the downstream chamber 4 is cut off.

15 until the valve portion 91 of the valve body 81 is seated on the valve seat 72 shown in FIG. Contents 2 corresponding to the volume increment flow (suck) from within outflow channel 62 to downstream chamber 4 .

The cap 1 according to the second embodiment has the following effects.
In the conventional cap, when the contents are discharged from the nozzle, air remaining in the downstream chamber inside the cap may be involved in the contents, and bubbles may be generated in the contents discharged from the nozzle.

On the other hand, the cap 1 according to the second embodiment is provided with an outflow passage 62 having an opening 65 at a position deviated from the center of the central lower surface 38 of the ceiling portion 31. An air reservoir 101 (recess) is provided on the opposite side of the outlet 62 from the opening 65 . As a result, when the container 10 is tilted, the air remaining in the downstream chamber 4 accumulates in the air reservoir 101 located at the top (high position) of the downstream chamber 4 when the container 10 is tilted. It is possible to suppress the air from being caught in the contents 2 flowing through the outflow channel 62 through the plurality of flow paths 73 (first communication channel), and is discharged from the outflow port 64 of the nozzle 61. It is possible to prevent air bubbles from being generated in the content 2 that is placed inside the container.

In addition, in the second embodiment, since the communication path 39 (second communication path) that communicates the flow path 73A and the outflow path 62 is provided in the lower surface 38 of the central portion of the ceiling portion 31, when the container 10 is tilted, the downstream The content 2 ejected from the flow path 73A positioned at the lower portion (lower position) of the chamber 4 is preferentially guided to the outflow path 62 . As a result, it is possible to further suppress the entrainment of the air remaining in the downstream chamber 4 into the contents 2, and the generation of air bubbles in the contents 2 flowing out from the outlet 64 of the nozzle 61 can be more effectively prevented. can be effectively prevented.

In the above-described embodiment, the cap 1 is applied to a tube container (container 10), but the embodiment is not limited to this. The cap 1 is attached to a so-called double container (see Patent Document 1), which is composed of a container and a bag-like inner container that is integrally provided in the outer container and the majority of which is separable from the outer container. can be applied.

1 Cap, 2 Contents, 3 Upstream Chamber, 4 Downstream Chamber, 10 Container, 11 Mouth, 15 Container Body, 21 Cap Body, 31 Ceiling, 51 Boss, 61 Nozzle, 65 Opening, 71 Check Valve, 72 Valve seat, 73 flow path, 81 valve body, 82 seal portion (outer edge portion), 83 seal holding groove (holding portion), 85 partition wall, 91 valve portion

Claims

Consists of a cap body attached to the mouth of the container and an annular valve body of a check valve that allows the contents to flow from the inside of the container to the outside of the container,
The cap main body includes a ceiling portion that closes the opening of the container opening, a boss that protrudes from the center of the lower surface of the ceiling portion, a seal holding portion that is provided on the outer periphery of the lower surface of the ceiling portion, and the ceiling. a nozzle projecting upward from the ceiling, having a discharge passage opening between the boss and the seal holding portion on the lower surface of the portion;
An annular valve seat of the check valve is provided on the outer edge of the tip of the boss,
The valve body has an outer edge portion which is liquid-tightly held by the seal holding portion provided outside the lower end opening of the nozzle, and the boss is slidably inserted into the valve seat so that it can be seated and removed from the valve seat. a seated annular valve portion formed integrally with the valve portion and the outer edge portion to divide the inside of the container mouth portion into an upstream chamber on the container body side and a downstream chamber on the nozzle side; a partition that biases in the valve closing direction,
A cap, wherein opening of the check valve allows the upstream chamber and the downstream chamber to communicate with each other through a channel provided between the boss and the valve body.
A cap according to claim 1,
A cap, wherein the flow path extends from a certain height from the valve seat to a proximal end of the boss.
The cap according to claim 1 or 2,
An annular groove extending in the circumferential direction via an annular stepped portion is provided on the outer periphery of the proximal end of the boss,
A cap, wherein one end of the nozzle is open at the bottom of the annular groove.
A cap according to claim 1,
On the lower surface of the ceiling portion, an outflow passage for the nozzle is opened at a position deviated from the center of the cap body, and an air reservoir is provided on the opposite side of the opening of the outflow passage with respect to the center of the cap body. A cap, characterized in that it is provided with a recess.
A cap according to claim 4,
A first communication passage that communicates between the upstream chamber and the downstream chamber is provided at the center of the lower surface of the ceiling,
A cap according to claim 1, wherein a second communication passage is provided on the lower surface of the ceiling portion to communicate the first communication passage and the outflow passage.