JP2022074415A - Airless cap and container with the same - Google Patents

Abstract

To provide an airless cap that allows proper pouring of the contents regardless of a pressing force against the containing body and that does not allow air to flow into a container during the pouring of the contents.SOLUTION: An airless cap 1 includes a body housing 10 equipped with a pouring port 11 through which contents are poured out, an inside plug 20 attached to the interior of the body housing 10 and provided with a flow channel 27 leading from the interior space of a housing to the pouring port 11, and a valve body 50, which is roughly flat, elastically deformable, and is interposed between the body housing 10 and the inside plug 20 when the inside plug 20 is attached to the body housing 10. The pouring port 11 is offset with respect to the central area of the valve body 50, and the inner top surface of the body housing 10 has an uneven surface 12 that the valve body 50 can contact when pouring the contents.SELECTED DRAWING: Figure 2

Description

The present invention is an airless cap attached to a container for accommodating the contents and having a function of blocking the inflow of outside air when the contents are poured out, and a container with an airless cap equipped with such an airless cap. Regarding.

Conventionally, in the fields of daily necessities, foods, medical care, chemistry, etc., containers for storing cosmetic liquids, beverages, chemicals, inks, oils, etc. (hereinafter collectively referred to as contents) have been known and are stored. There are various kinds of contents such as those whose quality gradually deteriorates with the passage of time, liquids, semi-liquids, and liquids containing fine particles in a dispersed manner. Oxidation due to contact with the outside air is one of the causes of quality deterioration. Therefore, the cap that is attached to the container and dispenses the contents must be configured to allow the contents to be poured and prevent the outside air from flowing in. Has been done. In addition, the container includes a single container such as a pouch pack that can be reduced in volume and deformed, an inner body that can be reduced in volume and deformed inside, and a double container that has an outer body that can be restored to its original shape (having squeeze properties) on the outside. Exists.

In the double container, the contents can be poured out by applying pressure to the inner body by pressing the outer body, and the outer body returns to its original shape when the pressing pressure is released, and the inner body is deformed as it is (the inner body is deformed as it is. Volume reduction and deformation) is maintained. As a cap that is attached to such a double container and does not allow outside air (air) to flow in, the Patent Applicant has made a deformable container an airless cap that allows the contents to be poured out and blocks the inflow of outside air. (See Patent Document 1).

This airless cap is substantially flat, with a main body equipped with a spout from which the contents are poured, and an inner plug that is attached to the inside of the main body and has a spout path from the internal space of the housing to the spout. It is elastically deformable and has a valve body that is interposed between the main body and the inner plug and becomes a fixed state when the inner plug is attached to the main body, and the inner plug has a central region of the valve body. It has a pressure contact portion with an inclined surface that is elastically deformed to maintain a close contact state. The valve body is formed with an opening that exposes the central region of the inclined surface in close contact with the inclined surface, and the inner plug and the valve body are formed from the inclined surface when a pressing force is applied to the accommodating body. The contents are discharged by separating the valve bodies, and when the pressing force acting on the accommodating body is released, the valve bodies are brought into close contact with the inclined surface to prevent the inflow of outside air.

Japanese Unexamined Patent Publication No. 2020-93833

The above-mentioned airless cap makes it possible to eject the contents by pressing the containment body (outer body) to separate the valve body from the inclined surface, but the force for pressing the containment body varies from person to person. It is not possible to control the injection amount constantly. For example, if the user presses the containment body with a slightly strong force, an unexpected amount of contents may be poured out, and in the airless cap, the distance between the inner plug and the valve body due to the pressing force ( Since the outflow gap) and the flow velocity fluctuate, the pouring amount of the contents may fluctuate (not a constant pouring amount) when the pressing condition of the container changes, and there is room for improvement.

The present invention has been made by paying attention to the above-mentioned problems, and the contents can be properly dispensed regardless of the pressing force on the contents, and air does not flow into the contents during the injection of the contents. It is an object of the present invention to provide a container with a cap and an airless cap.

In order to achieve the above object, the airless cap according to the present invention is attached to a deformable container that houses the contents, and when the contents are poured out by a pressing force acting on the contents, the contents are ejected. It is configured to allow the pouring of the outside air and prevent the inflow of outside air, and is attached to the inside of the main body housing and the main body housing provided with the spout outlet from which the contents are poured, and is poured from the internal space of the housing. It can be expanded and contracted or elastically deformed with an inner plug provided with a flow path leading to the outlet, and when the inner plug is attached to the main body housing, the outer peripheral side is fixed by interposing between the main body housing and the inner plug. The inner plug has a valve body, and the inner plug has a pressure contact portion having an inclined surface that maintains a close contact state with the central region of the valve body when attached to the main body housing, and the spout has a spout. The valve body is disposed offset from the center of the pressure contact portion, and the valve body is formed with an opening that exposes the central region of the inclined surface in close contact with the inclined surface, and is above the pressure contact portion. On the inner top surface of the main body housing, when the opening of the valve body is separated from the inclined surface, a regulation flow path is provided between the inner end edge defining the opening of the valve body and the inner top surface. The inner plug and the valve body are separated from each other from the inclined surface toward the inner top surface of the housing when a pressing force is applied to the accommodating body. The flow path is opened, and the contents can be poured out from the spout from the regulated flow path formed by the valve body coming into contact with the unevenness, and the valve body acts on the accommodation body. It is characterized in that it constitutes a pouring valve that comes into close contact with the inclined surface and closes the flow path when the pressing force is released.

The airless cap having the above structure can be expanded and contracted or elastically deformed with a main body housing provided with a spout and an inner plug attached to the inside of the main body housing, and when the inner plug is attached to the main body housing, the main body is said. It is composed of three parts of a valve body that is interposed between the housing and the inner plug and the outer peripheral side is fixed.
The inner plug has a pressure contact portion having an inclined surface that maintains an intimate state with the central region of the valve body in a state of being attached to the main body housing, and the valve body is in an intimate state with respect to the inclined surface. An opening is formed to expose the central region of the inclined surface. When a pressing force is applied to the housing, the opening region of the valve body comes into contact with the unevenness formed on the inner top surface of the main body housing to form a gap (regulated flow path) in that portion. This void is always the same amount of void when the opening region of the valve body comes into contact with the unevenness. Since the contents flow out from the spout through this void, a constant pouring amount from the void is always obtained regardless of the pressing force on the container.

The above-mentioned airless cap has an inner body for accommodating the contents and an outer body provided so as to surround the inner body and forming an outside air inflow path between the inner body and the inner body. It can be mounted on a double-molded container or a container (pouch pack) composed of a plastic film sheet having a welded periphery around it. In this case, in the former double-molded container, an intake port may be formed in the vicinity of the spout, and an intake valve may be formed in a part of the valve body so as to close the intake port.

According to the present invention, with an airless cap and an airless cap, the contents can be properly poured out from a certain gap regardless of the pressing force on the container, and air does not flow into the container when the contents are stopped. A container is obtained.

The schematic which shows the 1st Embodiment of the airless cap and the container which concerns on this invention. FIG. 2 is a cross-sectional view showing the configuration of the airless cap shown in FIG. 1A and 1B are views showing the configuration of the main body housing of the airless cap, where FIG. 1A is a plan view, FIG. 1B is a central sectional view, and FIG. 1C is a sectional view taken along the line AA of FIG. , (D) is a side view, and (e) is a back view. 3A and 3B are views showing an inner plug mounted on the main body housing shown in FIG. 3, where FIG. 3A is a plan view, FIG. 3B is a central sectional view, FIG. 3C is a side view, and FIG. 3D is a back view. It is a figure which shows the valve body attached to the inner plug, (a) is a plan view, (b) is a central sectional view, (c) is a side view, (d) is a back view. It is sectional drawing explaining the operation of the airless cap, (a) is the figure which shows the normal state, (b) is the figure which shows the state which the contents are poured out by applying a pressing force (FIGS. 2 and 6 (FIG. 2, FIG. The structure of the valve body is different from that of a)). It is sectional drawing explaining the operation of the airless cap, and is the figure which shows the state which the outside air flows in. It is a figure which shows the function of the unevenness formed on the inner top surface of the main body housing, (a) and (b) are the comparison figure of the state without unevenness and the state with unevenness, (c) and (d) are the central. A comparison diagram of the state where there is no small convex on both sides of the convex and the state where there is a small convex. (A) to (d) are diagrams showing various deformation examples of unevenness, respectively. (A) is a diagram showing a deformation example in the extending direction of the unevenness, and (b) and (c) are diagrams showing still another deformation example of the unevenness. It is a figure which shows the deformation example of a valve body, (a) is a plan view, (b) is a central sectional view. The figure which shows the 2nd Embodiment of the container to which the airless cap which concerns on this invention is attached. The figure which shows the structure of the airless cap attached to the container shown in FIG.

The airless cap according to the present invention is attached to a container molded into a double structure or a container (pouch pack) in which plastic film sheets are stacked and welded around the container, and when the pouring of the contents is stopped. In addition, it has a function to prevent outside air from flowing into the container housing.
Hereinafter, an embodiment of the airless cap according to the present invention and an embodiment of a container to which the airless cap is attached will be described with reference to the drawings.

1 to 5 are views showing the configuration of a first embodiment of an airless cap and a first embodiment of a container.
The container 100 of the present embodiment is configured as a double-molded container including an inner body 101 and an outer body 102, and the contents are housed in the inner body 101, and as shown in the schematic view of FIG. 1, the inner body The structure is such that the outside air inflow path A1 is provided in the airless cap so as to introduce outside air (air) between the 101 and the outer body 102. In such a container 100, when the body portion of the outer body 102 is pressed during use, the inner body 101 is volume-reduced and deformed, and the contents are poured out through the pouring path A2. Further, the outer body 102 returns to its original shape due to its squeeze property, and at that time, outside air is introduced between the inner body 101 and the outer body 102, so that the inner body 101 is maintained in a reduced volume deformed state. ..

Since the above double container is known, its detailed structure will be omitted, but for example, it can be manufactured by blow molding a polyolefin resin (polyethylene, polypropylene, etc.) or a polyester resin (polyethylene terephthalate, etc.). Is possible. The double-molded container used in the present invention is not limited in its material, shape, size, and the like.

In the above-mentioned container 100, an airless cap 1 is attached to the spout portion thereof. The airless cap 1 of the present embodiment is configured as a check valve (outlet valve) for preventing outside air from flowing into the inner body 101 when the contents are poured out, and the inner body 101 and the outer body. It has a configuration as a check valve (intake valve) that allows only the inflow of outside air to the 102.

In this case, the container 100 is provided with a mounting structure for mounting the airless cap 1, and outside air is allowed to flow between the inner body 101 and the outer body 102 through the outside air inflow path A1. It has become like.
In the container 100 of the present embodiment, as shown in FIG. 2, the mouth portion 101a of the inner body 101 slightly protrudes from the mouth portion 102a of the outer body 102, and the flange 101b formed along the outer periphery of the mouth portion 101a. Is in contact with the opening edge 102b of the mouth portion 102a and is locked. In such a locking structure, an arcuate notch 105 along the circumferential direction is formed between the flange 101b and the opening edge 102b at regular intervals, and the notch 105 is the outside air. It functions as an inflow path (hereinafter, also referred to as an outside air inflow path 105). The notches 105 are formed at four locations along the circumferential direction at intervals of approximately 90 °, and outside air flows in between the inner body 101 and the outer body 102 via the intake valve of the airless cap 1 described later. Let me.

Further, a male screw 102c is formed on the outer peripheral surface of the mouth portion 102a of the outer body 102. A female screw portion 20c formed on the airless cap 1 (the inner plug 20 integrated with the main body housing 10 described later) is screwed into the male screw 102c, and the airless cap 1 is fixed to the container 100. The airless cap 1 and the container 100 preferably have a removable structure so that the container and the airless cap can be separately processed after the container is used.

Next, the configuration of the airless cap 1 of the present embodiment will be described.
The airless cap 1 of the present embodiment is attached to the inside of the main body housing 10 and the main body housing 10 having a spout port 11 from which the contents housed in the inner body 101 are discharged, and is injected from the internal space of the inner body 101. When the inner plug 20 provided with the flow path (pouring path) 27 leading to the outlet 11 and the inner plug 20 are attached to the main body housing 10, the inner plug 20 is interposed between the main body housing 10 and the inner plug 20 and becomes a fixed state. It has a valve body 50 and.

As shown in FIG. 3, the main body housing 10 is formed in a substantially cap shape provided with a circumferential wall 10a and a top plate 10b. An engaging portion for fitting and fixing the inner plug 20 is formed on the inner surface of the circumferential wall 10a. The engaging portion may be any as long as it can be fitted and fixed to the inner plug 20 from the axial direction. (Consists of) is possible. Further, a bulging portion 10d that bulges outward is formed in the central region of the surface of the top plate 10b, and the back surface (inner top surface) 10d'of the central portion has unevenness described later. 12 is formed.

The bulging portion 10d is formed with a spout 11 for pouring out the contents at an offset from the position where the unevenness 12 is formed. The spout 11 is formed so as to project upward, and the unevenness 12 is formed at a position facing the pressure contact portion 25 of the inner plug 20, which will be described later. Therefore, the spout 11 is formed on the pressure contact portion 25. It is formed at a position offset from the center. Further, when the content is poured out from the spout 11 and the pressing force on the container 100 is released, the content is drawn into the inside of the bulging portion 10d without staying in the opening portion of the spout 11. (In this space S, when the pouring of the contents is stopped, the contents are held when the contents near the spout are pulled back to the inside of the container. ).

An intake port (opening) 14 is formed in a part of the top plate 10b. The intake port 14 of the present embodiment is formed on a part of the side surface of the bulging portion 10d formed on the top plate 10b, and is opened as it is on the back surface of the top plate 10b to form an inner body 101 and an outer body 102. It has a function of allowing outside air to flow in between and (constituting a part of the outside air inflow path A1). The intake port 14 communicates with the annular gap S1 formed between the back surface side of the top plate 10b and the top plate 20b of the inner plug 20 when the inner plug 20 is fitted to the main body housing 10. , The outside air can enter the gap S1 through the intake port 14. Then, the outside air that has entered the gap S1 further includes an opening 21 to be described later formed in the top plate 20b of the inner plug 20, and the outside air inflow path formed between the flange 101b and the opening edge 102b described above. It is possible to flow in between the inner body 101 and the outer body 102 via 105.
In this case, a check valve (intake valve) formed by a valve body 50, which will be described later, is disposed between the annular gap S1 and the intake port 14, and is between the inner body 101 and the outer body 102. Only the inflow of outside air is allowed.

Further, a closing member for closing the spout 11 is attached to the main body housing 10. The closing member of the present embodiment is composed of a rotating cap 15 that is opened and closed via a hinge 15a on a part of the outer side of the main body housing 10. On the back surface of the rotating cap 15, a locking piece 15b that enters the spout 11 when the rotating cap 15 is closed is formed so as to project. Therefore, when the rotating cap 15 is rotated and closed with respect to the main body housing 10, the locking piece 15b enters the spout 11 and becomes a fixed state, and the knob 15c is picked up and lifted to rotate via the hinge 15. Then, the contents can be poured out from the pouring port 11.
In addition to the above-mentioned rotation method, such a closing member may have a structure of being attached / detached to / from the main body housing by a screw type, a configuration of being press-fitted to be attached / detached, and the like.

Next, the configuration of the inner plug 20 will be described mainly with reference to FIG. 4.
The inner plug 20 holds the valve body 50, which can be expanded and contracted or elastically deformed, between the main body housing 10 (the back surface side of the top plate 10b), and guides the contents in the container to the spout 11. It has the function of leaking. That is, the inner plug 20 and the valve body 50 have a function as a check valve (pouring valve) that allows the contents to flow out to the spout 11 through the flow path 27 and does not allow the outside air to flow into the container.

The inner plug 20 is formed in a cap shape and includes a circumferential wall 20a and a top plate 20b. The female screw portion 20c is formed on the inner surface of the circumferential wall 20a, and the airless cap 1 is fixed to the container 100 by screwing with the male screw 102c formed on the outer peripheral surface of the outer body 102. (See Fig. 2). Further, on the outer surface of the circumferential wall 20a, a plurality of recesses 20d that engage with the protrusions 10c formed on the circumferential wall of the main body housing 10 are formed, and the recesses 20d are aligned with the protrusions 10c. The inner plug 20 is integrated with the inner plug 20 in a state of being internally fitted in the main body housing 10. When both are integrated, the above-mentioned annular gap S1 is formed between the back surface of the top plate 10b of the main body housing 10 and the surface of the top plate 20b of the inner plug 20.

An opening (through hole) 21 is formed on the outer peripheral side of the top plate 20b of the inner plug 20. A plurality of openings 21 (six in the present embodiment) are formed in an arc shape at regular intervals along the circumferential direction, and the outside air flowing into the annular gap S1 is inside through the notch 105. It has a function of flowing in between the body 101 and the outer body 102. Further, an annular protrusion 22 is formed on the back surface of the top plate 20b, and when the inner plug 20 is attached to the outer body 102, the annular protrusion 22 is press-fitted into the mouth portion 101a of the inner body 101. ing.

An annular groove 23 is formed on the surface of the top plate 20b in the radial direction of the opening 21, and the valve body 50 is formed by press-fitting the annular protrusion 51 formed in the valve body 50 into this portion. It can be attached to the inner plug 20. Further, in the central portion of the surface of the top plate 20b, a pressure contact portion 25 having an inclined surface 25a that elastically deforms the central region of the valve body 50 to be attached and maintains a close contact state is integrally formed. There is.

The pressure contact portion 25 of the present embodiment is formed in a substantially truncated cone shape so as to project upward, and the valve body 50 is brought into close contact with the peripheral wall (inclined surface 25a) by elastic force. A plurality of (six in this embodiment) openings (flow paths 27) are formed at substantially equal intervals along the circumferential direction on the radial outer side of the pressure contact portion 25, and are formed from the internal space of the inner body 101. The pouring path A2 leading to the pouring outlet 11 is configured.

The pressure contact portion 25 bulges toward the top plate side of the main body housing 10, and the central region of the valve body 50 attached to the surface of the top plate 20b of the inner plug 20 has no gap on the inclined surface 25a thereof. The shape is not limited as long as it is configured to be uniformly adhered. That is, by forming the pressure contact portion 25 so as to bulge, the valve body 50 that can be expanded and contracted or elastically deformed uniformly adheres to the entire surface (inclined surface 25a) of the pressure contact portion 25 to form the flow path 27. It can be closed and can exert a sealing function to prevent the contents from flowing out to the spout side. Therefore, the surface shape thereof can be appropriately deformed.

The main body housing 10 and the inner plug 20 configured as described above can be integrally formed as one piece by molding synthetic resins such as polypropylene and polyethylene resin, respectively.

As shown in FIG. 5, the valve body 50 has a thin wall thickness and is substantially flat, and is integrally formed of an elastically deformable material such as elastic plastic, silicon, or elastomer. The valve body 50 is formed in a substantially circular shape, and on the back surface side, an annular protrusion (hereinafter, also referred to as a fixed portion) that fits into the annular groove 23 formed in the inner plug 20 slightly radially inward from the outer peripheral end. (Referred to as) 51 is formed. Since the annular protrusion 51 is formed in an annular shape and has a thick wall shape, the annular zone region 52 outward in the radial direction becomes a region that is easily bent as a whole. The annular region 52 functions as an intake valve that allows only the inflow of outside air between the inner body 101 and the outer body 102.

In the central region of the valve body 50, a circular opening 53 that exposes the central region of the inclined surface 25a (the surface of the top region of the pressure contact portion 25) is formed in a state of being in close contact with the inclined surface 25a of the pressure contact portion 25. ing. As shown in FIG. 5B, the valve body 50 of the present embodiment is formed in a concave shape having a gently recessed cross section from the fixed portion 51 on the outer peripheral side to the opening 53. That is, the valve body 50 is gently annularly recessed from the fixed portion 51 inward in the radial direction, and further gradually rises as it moves inward in the radial direction, and a circular opening 53 is formed on the top side thereof. ..

According to the shape of such a valve body, the annularly recessed portion 54 functions as a stretchable reversing portion (hereinafter, also referred to as a reversing portion 54), and in a state where no pressing force is applied, the pressure contact portion. It is possible to enter the flow path 27 formed around the 25, and the peripheral region of the opening 53 is elastically in close contact with the inclined surface 25a of the pressure contact portion 25 (FIGS. 2 and 6 (FIG. 2 and 6). a) See).

As a result, when a pressing force acts on the housing 100, as shown by the dotted line in FIG. 2, the reversing portion 54 swells in a dome shape (the front surface side expands and the back surface side contracts) due to the pressure of the contents, as described above. , The contact with the pressure contact portion 25 is released, and the flow path 27 is opened. Further, when the pressing force is released, the solid line in FIG. 2 and, as shown in FIG. 6A, the reversing portion 54 is inverted toward the accommodating body side (the front surface side shrinks and the back surface side expands) into the flow path 27. It can be displaced to enter.

By forming the reversing portion 54 that expands and contracts and deforms on the radial outer side of the opening 53 of the valve body 50 in this way, the reversing portion 54 effectively enters the flow path 27 when no pressing force is applied. Therefore, it is possible to further improve the sealing property.
It should be noted that such an inverted portion 54 can be easily formed, for example, by making the wall thickness around the opening 53 thinner than that of other portions of the valve body. Further, when the valve body 50 on which such an inverted portion 54 is formed is adhered, the inverted portion of the valve body 50 is inverted in the region of the inclined surface 25a of the pressure contact portion 25 to block the flow path 27, and the flow path is formed. When it enters 27, it is preferably formed so as to follow the shape of the valve body 50, which makes it possible to improve the adhesion between the valve body and the inclined surface.

As described above, in the pressure contact portion 25 and the valve body 50 in close contact with the pressure contact portion 25, when the accommodation body 100 is pressed, the close contact state of the pressure contact portion 25 with respect to the inclined surface 25a is eliminated, and an injection path is formed, and the accommodation body is formed. When the pressure of 100 is released, the peripheral region of the opening 53 of the valve body 50 elastically adheres to the inclined surface 25a of the pressure contact portion 25 again to block the flow path 27 and prevent the inflow of outside air. It functions as a check valve (outlet valve). At this time, even if fine particles are present in the contents and are sandwiched between the inclined surface 25a and the valve body 50, the valve body 50 is pressed and wrapped by its elasticity to suppress the formation of gaps due to the fine particles. (The effect of preventing the inflow of outside air is enhanced).

The valve body 50 is always in close contact with the inclined surface 25a of the pressure contact portion 25 of the inner plug 20, and from that state, a pressing force is applied to the accommodating body 100 to push the contents into the flow path 27. At that time, it suffices if the contact with the inclined surface 25a is eliminated by the pressure of the contents, and when the pressing force of the housing 100 is released, the contact with the inclined surface 25a can be achieved again, and the configuration thereof is limited. There is no such thing. For example, as shown in FIG. 6B, by simply forming the reversing portion 54, which is recessed in an annular shape as described above, between the opening portion 53 and the fixed portion 51 so as to be elastically deformable. In addition, when a pressing force acts on the housing body 100, it is also possible to elastically deform the peripheral region of the opening 53 so as to push it up and pour out the contents. Alternatively, the valve body 50 is as described above, such as forming a bellows-shaped (concentric unevenness) portion between the opening 53 and the fixed portion 51, or forming a thin-walled thick portion as appropriate. As long as it can be transformed so as to obtain an action, its composition is not limited.

Since the valve body 50 having the above-mentioned shape is formed in a substantially flat shape with a thin wall thickness, it can be integrally molded by injection molding, press working, etc., and the expansion / contraction rate is 50 to 800 in terms of physical properties. It is preferable to use a material of about%. The thickness is preferably set appropriately according to the elasticity of the material used, the inclination angle of the inner plug, and the like.

As described above, the airless cap 1 of the present embodiment is configured as a check valve (outlet valve) for preventing outside air from flowing into the inner body 101 when the contents are poured out, and also on the inner side. It has a configuration as a check valve (intake valve) that allows only the inflow of outside air between the body 101 and the outer body 102. Such a function as an intake valve can be configured by utilizing the annular region 52 which is more easily bent in the radial direction than the annular projection 51 of the valve body 50 described above.

Hereinafter, such an intake valve structure will be described.
On the radial outer side of the surface of the valve body 50, on the opposite side of the annular protrusion 51, an annular convex portion 52a is formed so as to have a sealing property and to easily bend the annular region 52. The annular protrusion 52a fits the annular projection 51 of the valve body 50 into the annular groove 23 of the inner plug 20 to integrate the two, and the integrated inner plug 20 with the valve body is attached to the main body housing 10. When attached, it comes into contact with the back surface of the top plate 10b of the main body housing 10. In this case, the diameter of the valve body 50 is formed so that the annular zone region 52 can close the intake port 14 formed in the main body housing 10. Further, on the back surface of the top plate 10b of the main body housing 10, an annular convex portion 14a is formed on the radial outer side of the intake port 14, and the outer peripheral side surface of the annular zone region 52 is the annular convex portion. It is in a state of being in contact with the portion 14a (see FIG. 6).

When the contained body 100 is pressed in this state, the contents are poured out as described above, and the pressing is released, the outer body 102 returns to its original shape due to its squeeze property, and the intake port 14 is restored by the returning force at that time. The outside air is sucked from. At this time, as shown in FIG. 7, the annular zone region 52 elastically bends with the annular convex portion 52a as a fulcrum, and the outside air can enter the gap S1. Then, the outside air flowing into the gap S1 passes through the opening 21 formed in the top plate 20b of the inner plug 20 as it is and the outside air inflow path 105 between the inner body 101 and the outer body 102, and the inner body 101 It flows in between the outer body 102 and the inner body 101, and the inner body 101 is maintained in a volume-reduced and deformed state. When the outside air is no longer sucked from the intake port 14 (the outer body 102 returns to its shape), the annular region 52 elastically returns, its outer peripheral surface abuts on the annular convex portion 14a, and the intake port 14 is closed. Will be done.

That is, the valve body 50 attached to the inner plug 20 has a function of preventing outside air from flowing into the inner body 101 when the contents are poured out, and the inner body 101 and the outer body 102 It also has a function as a check valve (intake valve) that allows only the inflow of outside air.

In the above configuration, the valve body 50 is attached to the inner plug 20 and incorporated into the main body housing 10, so that the airless cap 1 in which these members are unitized can be obtained. In this case, since the intake valve uses the annular region 52 of the valve body 50, it is not necessary to position the intake valve between the intake port 14, the valve body 50, and the inner plug 20 of the main body housing 10, and the unit can be easily united. It can be converted and attached to the housing body 1.

As described above, the unevenness 12 is formed on the inner top surface 10d'of the main body housing 10 above the pressure contact portion 25 of the inner plug 20. The unevenness 12 is located above the pressure contact portion 25 at a position where the region of the opening 53 of the valve body 50 that elastically deforms when the contents are poured (the inner end edge 53a of the opening and the annular surface 53b around the opening) abuts. It is formed and has a function of adjusting the pouring flow rate from the pouring outlet 11 formed so as to be offset with respect to the position of the unevenness 12. The unevenness 12 may be formed in an uneven shape by forming ribs or protrusions on the inner top surface 10d', or may be formed in an uneven shape by forming a groove (recess).

Hereinafter, the configuration of the unevenness 12 of the present embodiment and the function of adjusting the pouring flow rate will be described with reference to FIG. Note that FIG. 8 shows an example in which the unevenness 12 is formed by forming a rib on the inner top surface 10d'of the main body housing 10.
8 (a) and 8 (b) are comparison diagrams of a state without unevenness and a state with unevenness. As described above, when the contents are poured out by pressing the housing 100, does the central portion (the region where the opening 53 is formed) of the valve body 50 expand and contract and bulge upward (see FIG. 2)? Alternatively, it elastically deforms upward (see FIG. 6 (b)).

If the inner top surface 10d'is not formed with irregularities, the opening 53 directly abuts on the inner top surface 10d'as shown in FIG. 8A, and the opening 53 (inner end edge 53a and annular shape) is formed. The surface 53b) may be blocked. This is because the opening 53 is not closed if the pressing force is weak, so that the contents can be poured out without the opening 53 hitting the inner top surface 10d', but when the pressing force is strong, the opening is open. 53 abuts on the inner top surface 10d', blocking the flow path and making it impossible to inject the contents. That is, depending on the magnitude of the pressing force, the contents may or may not be poured out, and the pouring amount may not be stable.

On the other hand, as shown in FIG. 8B, by forming ribs 12a and 12b extending linearly and parallel to the portion where the opening 53 is located, when a pressing force is applied, the opening 53 is formed. Since the inner edge 53a and the annular surface 53b, which is a peripheral region thereof, make line contact with the tops (linearly extending portions) 12a'and 12b' of the ribs 12a and 12b, the ribs 12a and 12b The recess 12A between them is connected to the opening 53, and a flow path is secured. That is, even if the pressing force is increased, the opening 53 is not closed, the flow rate can be adjusted to a constant amount by the recess 12A, and the contents are poured out in a constant state regardless of the magnitude of the pressing force. (Hereinafter, the recess 12A is also referred to as a regulated flow path).

In this case, by increasing the height of the ribs 12a and 12b and shortening the distance from the opening 53, it becomes possible to bring the region of the opening 53 of the valve body into contact with the rib with a slight pressing force, which is weak. It is possible to stably secure a constant outflow amount from the pressing force to the strong pressing force. The cross-sectional shapes of the ribs 12a and 12b are not particularly limited, such as triangular, trapezoidal, and rectangular, but as shown in FIG. 8B, the ribs 12a and 12b have a triangular cross-sectional shape. , It is preferable to make line contact at the tops 12a'and 12b'. As a result, as shown by the arrow, the pressure of the contents can be dispersed on both sides, and the pressing force on the accommodation body can be reduced.

The number of ribs formed is not particularly limited, and when a plurality of ribs are formed, the shape of each rib is not particularly limited, but at least across the inner edge 53a of the opening 53. If it is formed at one or more places, it is possible to avoid the blocked state as shown in FIG. 8A. In this case, it is preferable to form a plurality of ribs (unevenness) in order to surely secure the pouring flow path. For example, when only one rib (extending linearly along the diameter direction of the opening 53) 12a is formed, when the pressing force is increased, the opening 53 is broken and the opening 53 is broken as shown in FIG. 8 (c). The inner edge 53a and the annular surface 53b around it come into contact with the inner top surface 10d', making it difficult to secure a flow path. On the other hand, by forming ribs 12b having the same shape and a smaller size on both sides of the ribs 12a, as shown in FIG. 8D, the above-mentioned bending is suppressed and a flow path is secured. It becomes possible to make it easier. Of course, the left and right ribs 12b may be formed to have the same size as the ribs 12a.

As described above, in the case of forming linear ribs, for example, when a plurality of parallel ribs 12a and 12b are formed as shown in FIGS. 8 (b) and 8 (d), the regulation flow path is formed between the ribs. It becomes a recess 12A. Therefore, as shown in FIG. 9A, by arranging the spout 11 offset in the extending direction of the ribs 12a and 12b formed in parallel, the contents of the spout 11 are the shortest. Objects can flow and the reactivity can be improved.

The configuration of the ribs (regulated flow paths formed by unevenness) described above should be appropriately deformed according to the liquid type (viscosity) of the contents of the container, the discharge application (dropping / mass discharging), and the like. Can be done. For example, when the unevenness is composed of ribs, the cross-sectional shape, number, width, and height of the central rib (rib 12a) that crosses the opening 53 of the valve body 50 in the radial direction and the rib (rib 12b) formed on the side thereof. (Size), formation position, etc. can be appropriately deformed.

For example, as shown in FIG. 9B, a plurality of ribs 12c having the same shape having a triangular cross section are arranged so as to be parallel to each other without forming a central rib that crosses the opening 53 in the radial direction. It may be a book (4 in the figure) formed. According to such a rib configuration, when a large pressing force is applied, the opening 53 portion of the valve body 50 is prevented from bending, and the size of the regulation flow path 12A between the ribs is kept constant. Therefore, it becomes easy to maintain a constant flow rate regardless of the pressing force.

Further, as shown in FIG. 9 (c), the shape of the central rib 12a may be increased and the ribs 12b on both sides thereof may be formed smaller. With such a rib configuration, it is possible to increase the flow rate. Further, as shown in FIG. 9 (d), a plurality of ribs 12c having the same shape having a triangular cross section are formed so as to be parallel to each other (six in the figure), and each rib is spouted out. The configuration may be formed only on the 11 side. In such a configuration, the inner end edge 53a ′ portion and the annular surface 53b ′ portion on the opposite side of the spout 11 of the opening 53 are in contact with the inner top surface 10d ′, and the flow path is blocked, but the spout is blocked. Since the regulation flow path 12A is secured on the side, it is possible to effectively direct the contents to the spout 11 side.

Further, as shown in FIG. 10A, the above-mentioned ribs may be formed in a plurality of ribs in a direction orthogonal to the direction shown in FIG. Further, as shown in FIG. 10B, a plurality of ribs 12d may be formed radially from a portion corresponding to the central portion of the opening 53 of the valve body 50. By forming in a radial manner in this way, the regulated flow path 12A expands radially, and it becomes possible to secure a large amount of outflow. Further, as shown in FIG. 10 (c), a plurality of parallel ribs 12e may be formed within the diameter range of the inner end edge 53a of the opening 53.
As described above, the unevenness formed on the inner top surface 10d'can be appropriately deformed according to the liquid type (viscosity) accommodated in the accommodating body 100, the discharge application, and the like.

In the present invention, when the contents are poured out from the housing 100, the valve body 50 having a check valve function is in contact with the inner top surface 10d'of the main body housing 10 and the opening 53 of the valve body 50 is opened. Any one provided with an uneven structure so that a regulated flow path is formed in the region may be used. Therefore, the unevenness may be formed on the valve body side instead of the main body housing side. For example, as shown in FIGS. 11A and 11B, even in a configuration in which a plurality of protrusions 58 are formed at predetermined intervals along the circumferential direction on the annular surface 53b around the opening 53 of the valve body 50. good.

12 and 13 are views showing a second embodiment of the airless cap and the container according to the present invention.
In the above-described embodiment, the double-molded type is exemplified as the container, but it can also be applied to a container (pouch pack) in which plastic film sheets are stacked.

Specifically, the container 200 is formed, for example, by superimposing rectangular film sheets 201a and 201b as shown in FIG. 12 and heat-welding the portion shown by the diagonal line with a heat bar or the like. Such a container is flexible so that it shrinks as the contents are poured out, and can be discarded as it is after it is used up.

The film sheets 201a and 201b are made of a flexible synthetic resin, and are formed of, for example, polyethylene or polypropylene so as to be easily welded. Further, the surface side thereof is composed of a so-called composite layer in which nylon, aluminum foil and the like are laminated so as to enhance the barrier property (gas barrier property and light shielding property) against the injected material. In addition to the tetrahedron shown in FIG. 12, such a container may be configured as a gusset body in which the bottom wall is welded to the lower edge portion to form a self-solid, and the side wall is welded in the thickness direction.

The configuration of the airless cap 1A attached to such a container 200 will be described.
The same reference numerals are given to the portions having the same configuration and function as those of the airless cap of the first embodiment, and detailed description thereof will be omitted.

A welded body (spout) 80 for fixing the airless cap 1A is interposed and welded to the upper end edge of the container 200 having the above-mentioned structure, and the film sheets 201a and 201b are welded to the welded body 80. Is provided with a welded portion 81 having a substantially elliptical cross section so that the welded portion 81 can be welded. Further, the welded body 80 is integrally formed with a cylindrical mouth portion 85 projecting upward, so that the airless cap 1A is screwed and fixed to the male screw portion 85a of the mouth portion 85. It has become.

In this case, in the airless cap 1A of the present embodiment, since the accommodating body 200 has a single structure, it is not necessary to form an intake valve as in the first embodiment, and the structure is simplified. That is, the main body housing 10 of the airless cap 1A is not formed with the intake port as in the first embodiment, and the elastically deformable valve body 50 integrated with the inner plug 20 is the first. The intake valve by the annular region 52 as in the first embodiment is not formed.

As described above, even if the housing is configured as a pouch pack, the manufacturing cost can be reduced because the shapes of the main body housing 10 and the valve body 50 need only be slightly changed.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment and can be variously modified.
Regarding the above-mentioned airless cap, a flat plate-shaped and elastically deformable valve body 50 is interposed between the inner plug 20 and the main body housing 10, and a pressure contact portion 25 having an inclined surface 25a provided on the inner plug 20 is provided. It suffices if the discharge valve is configured so as to be in close contact with the above, and other configurations can be appropriately modified. For example, the arrangement position of the spout 11 may be offset from the position where the unevenness 12 is formed, and the position, shape, and the like can be appropriately deformed.

The shape, arrangement mode, and flow path 27 of the pressure contact portion 25 formed on the inner plug 20 described above can also be appropriately deformed. For example, the unevenness 12 with which the valve body 50 abuts may be formed on the entire surface of the inner top surface 10d', and when the unevenness 12 is formed by ribs, it may be curved in addition to linear. , May be bent.

Further, the accommodating body can be variously deformed, and for example, a method of forming an outside air inflow path, a method of attaching an airless cap, and the like can be appropriately deformed. Further, with respect to the above-described embodiments and modifications, the components of one embodiment or modification may be replaced with components of another embodiment or modification, or they may be combined and implemented.

1,1A Airless cap 10 Main body housing 12 Unevenness (rib)
20 Inner plug 25 Pressure welding part 25a Inclined surface 50 Valve body 53 Opening 100,200 Accommodating body

Claims (12)

An airless cap that is attached to a deformable container that houses the contents and allows the contents to be poured out when the contents are poured out by the pressing force acting on the container, and prevents the inflow of outside air. hand,
The airless cap includes a main body housing provided with a spout from which the contents are poured, an inner plug attached to the inside of the main body housing and provided with a flow path from the internal space of the housing to the spout. A valve body that can be expanded and contracted or elastically deformed, and has an outer peripheral side fixed between the main body housing and the inner plug when the inner plug is attached to the main body housing.
Have,
The inner plug has a pressure contact portion provided with an inclined surface that maintains close contact with the central region of the valve body when attached to the main body housing.
The spout is arranged offset from the center of the pressure contact portion.
The valve body is formed with an opening that exposes the central region of the inclined surface in close contact with the inclined surface.
On the inner top surface of the main body housing above the pressure contact portion, when the opening of the valve body is separated from the inclined surface, between the inner end edge defining the opening of the valve body and the inner top surface. There are irregularities that form voids that serve as regulatory channels.
When a pressing force acts on the housing, the inner plug and the valve body move apart from the inclined surface toward the inner top surface of the housing to open the flow path and open the valve body. Allows the contents to be poured out from the spout from the regulated flow path formed by contacting the unevenness.
The airless cap is characterized in that the valve body constitutes a discharge valve that comes into close contact with the inclined surface and closes the flow path when the pressing force acting on the housing body is released. The airless cap according to claim 1, wherein the unevenness is formed at one or more locations so as to cross the inner end edge of the opening of the valve body. The airless cap according to claim 2, wherein a plurality of the irregularities are linearly formed in parallel. The airless cap according to claim 2, wherein a plurality of the irregularities are formed radially from a portion corresponding to the central portion of the opening of the valve body. The airless cap according to any one of claims 1 to 4, wherein the valve body has a gently concave cross section from the fixed portion on the outer peripheral side to the opening. When a pressing force acts on the accommodating body between the opening and the fixed portion, the valve body bulges toward the inner top surface of the main body housing and the pressing force is released. The airless cap according to any one of claims 1 to 5, wherein the housing is provided with a reversing portion capable of reversing and entering the flow path. The airless cap according to claim 6, wherein the reversing portion of the valve body includes a thin-walled region having a wall thickness thinner than that of other parts of the valve body. A claim characterized in that the inclined surface of the inner plug is formed so as to follow the shape of the valve body when the inverted portion of the valve body is inverted and enters the flow path in the region blocking the flow path. Item 6. The airless cap according to Item 6. The airless cap according to any one of claims 1 to 8, wherein the valve body is integrally molded of elastic plastic, silicon, or an elastomer. An intake port through which outside air can flow in is formed in a part of the main body housing.
According to claim 1, the outer peripheral side of the valve body is configured to have an intake valve that can elastically close the intake port of the main body housing, allow the inflow of outside air, and limit the discharge. The airless cap according to any one of 9. A container to which the airless cap according to claim 10 can be attached.
An inner body constituting the container for accommodating the contents, an outer body formed so as to surround the inner body, and an outside air inflow path allowing air to flow in between the inner body and the outer body. Have,
The airless cap is fixed to the mouth portion formed on the outer body and is fixed to the mouth portion.
A container characterized in that, with the airless cap fixed to the mouth of the outer body, outside air can flow between the inner body and the outer body through the intake valve and the outside air inflow path. A container to which the airless cap according to any one of claims 1 to 9 can be attached.
The main body of the airless cap is fixed to a mouth portion integrally formed with a welded body having a welded portion having a substantially elliptical cross section.
A container characterized in that a plastic film sheet whose surroundings are welded is welded to the welded portion.

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