Discharger

Abstract

To discharge contents while securing stable operability even if the contents include solid matter, and also contribute to reduction in synthetic resin amount.SOLUTION: There is provided a discharger 1 that comprises: a cylinder 10 which is combined with a mouth part 3 of a container body 2 and the inside of which communicates with the inside of the container body; a stem 30 which is combined with the cylinder to move down, and the inside of which cooperates with the inside of the cylinder to function as a storage room R; a press-down head 40 which has a nozzle cylinder 43; a biasing member 70 which biases the stem upward; a suction valve 60; and a discharge valve 80. The stem moves down while pressing the inside of the storage room as it is pressed down by the press-down head, a fixed ring 50 is mounted on the cylinder, and the stem and the fixed ring are enabled to deform to expand and contract at least vertically, and coupled above and below through a stretchable film 90 covering the cylinder radially from outside over the whole circumference.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a dispenser. [Background technology]

[0002] As an example of a dispenser (discharge pump) to be attached to the mouth of a container body containing contents, as shown in Patent Document 1 below, there is known a dispenser which is fixed to the mouth of the container body via an attachment cap and is arranged above the mouth, a piston portion slidably disposed within the cylinder portion, a piston operating portion for operating the piston portion, a suction valve which opens in conjunction with the retraction movement of the piston portion, a nozzle portion which communicates with a liquid chamber in the cylinder portion, and a discharge valve which opens in conjunction with the pushing movement of the piston portion.

[0003] The piston operating portion includes an inner lid attached to the upper end of the cylinder portion, a push-down head that can be pushed down against the cylinder portion, a coil spring that urges the push-down head upward, and a connecting member that connects the push-down head and the piston portion.

[0004] According to the above-mentioned dispenser, by pressing down the depression head against the upward biasing force of the coil spring, the piston part can be pushed in and the liquid chamber in the cylinder part can be pressurized, whereby the contents stored in the liquid chamber can be discharged to the outside through the discharge valve and the nozzle part. When the depression of the depression head is then released, the piston part and the depression head are pushed up by the upward biasing force of the coil spring, and are moved back to their original state. As a result, the inside of the liquid chamber becomes negative pressure as the piston part is pulled back, so the contents can be sucked into the liquid chamber through the suction valve and stored there in preparation for the next discharge. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2013-96260 A Summary of the Invention [Problem to be solved by the invention]

[0006] In conventional dispensers, as described above, the piston part is mainly moved in the cylinder part by operating the pressing head. However, in this case, the piston part needs to be moved (sliding) while being in sliding contact with the inner circumferential surface of the cylinder part, so it is difficult to use contents that contain solid matter, for example. Specifically, when a content containing solid matter is applied, the solid matter may get into the sliding portion between the cylinder part and the piston part, which may affect the sliding property of the piston part and the sealing property between the cylinder part and the piston part. This may lead to inconveniences such as a decrease in the operability of the pressing head and an inability to dispense the content.

[0007] Furthermore, in the conventional dispenser, the piston operation part including the depression head requires an inner cover, a connecting member, and many other parts, which inevitably requires a large amount of synthetic resin to be molded into each of these parts. However, in consideration of the recent situation regarding environmental load, etc., there is a demand to reduce the amount of synthetic resin used, and there is room for improvement.

[0008] The present invention has been made in consideration of the above circumstances, and its object is to provide a dispenser that can ensure stable operability and dispense contents even when the contents contain solid matter, while also contributing to a reduction in the amount of synthetic resin used. [Means for solving the problem]

[0009] (1) The dispenser according to the present invention comprises a cylindrical cylinder which is combined with the mouth of a container body in which contents are stored and whose interior is in communication with the inside of the container body, a cylindrical stem which is combined with the upper end of the cylinder so as to be movable downward relative to the cylinder and whose interior functions as a storage chamber in cooperation with the interior of the cylinder, a depression head which is attached to the upper end of the stem and has a nozzle tube for discharging the contents to the outside, a biasing member which is provided within the storage chamber and biases the stem upward when the stem moves downward, and a biasing member which restricts the movement of the contents from the storage chamber toward the inside of the container body when the storage chamber is pressurized, and which restricts the movement of the contents from the container body toward the storage chamber when the storage chamber is depressurized. and a discharge valve that allows the movement of contents from the storage chamber toward the nozzle tube when the storage chamber is pressurized and that restricts the movement of contents from the nozzle tube toward the storage chamber when the storage chamber is depressurized, wherein the stem is combined to surround the cylinder from the radial outside, and moves downward while pressurizing the storage chamber in response to a pressing operation of the pressing head, a fixed ring is attached to the cylinder so as to surround the cylinder from the radial outside, and the stem and the fixed ring are capable of expanding and contracting at least in the vertical direction, and are connected vertically via an elastic film that covers the entire circumference of the cylinder from the radial outside.

[0010] According to the dispenser of the present invention, when discharging the contents, the push-down head is pushed downward. This allows the stem to be pushed down together with the push-down head against the upward bias of the biasing member, and the stem to move downward relative to the cylinder. As a result, the inside of the storage chamber (the inside of the cylinder and the inside of the stem) can be pressurized as the stem moves downward. This allows the discharge valve to be opened while the suction valve is closed, so that the contents in the storage chamber can be supplied toward the inside of the nozzle tube. Therefore, the contents in the storage chamber can be smoothly discharged to the outside through the nozzle tube as the push-down head is pressed down. In addition, when the stem moves downward, the elastic film connecting the stem and the fixing ring from above and below is deformed so as to be at least vertically crushed, so that the elastic film does not affect the downward movement of the stem.

[0011] After the contents are discharged, when the pressing operation of the pressing head is released, the stem and the pressing head can be moved upward relative to the cylinder while the elastic film is stretched by the upward bias of the biasing member. This reduces the pressure inside the storage chamber (creates a negative pressure). Therefore, the suction valve can be opened while closing the discharge valve, so that new contents can be sucked up from inside the container body and stored in the storage chamber. Therefore, an appropriate amount of contents can be smoothly stored in the storage chamber, and it can be prepared for the next discharge. In addition, since the elastic film stretches with the upward return movement of the stem, when the stem and the press-down head reach their original positions, the elastic film prevents further upward movement, so that the stem and the press-down head can be positioned at their original positions.

[0012] In particular, by pressing down the pressing head, the stem combined with the cylinder is moved downward to pressurize the inside of the storage chamber and discharge the contents. Therefore, unlike the conventional configuration in which the piston slides in the cylinder with the operation of the pressing head, even if the contents contain solid matter, the operability is not affected by the solid matter. Therefore, even if the contents contain solid matter such as an abrasive, the contents can be discharged while ensuring stable operability. Furthermore, since a piston is not required, the push-down head can be pushed down with a lighter force than when a piston is used. This results in a dispenser with excellent discharge operability. Moreover, since the outer peripheral surface of the cylinder can be used to guide the movement of the stem, the stem and the push-down head can be pushed down stably and smoothly. This also results in a dispenser with excellent operability.

[0013] Furthermore, for example, by changing the vertical length of the stretch film that connects the stem and the fixing ring at the top and bottom during manufacturing, the downward stroke (amount of movement) of the stem can be easily changed without replacing the main components, etc. This makes it possible to easily change the amount of content dispensed depending on the application, etc., making it a dispenser that can be used for a variety of applications. Furthermore, because it is a simple structure in which the stem combined with the pressing head and the fixed ring attached to the cylinder are connected vertically with an elastic film, the number of parts can be reduced compared to conventional products, and the amount of synthetic resin can be reduced, which contributes to reducing the burden on the environment.

[0014] (2) A plurality of vertical ribs protruding radially inward and extending vertically are formed at intervals in the circumferential direction on the inner surface of the stem, and the stem may contact the outer surface of the cylinder via the plurality of vertical ribs.

[0015] In this case, since the stem tube contacts the outer peripheral surface of the cylinder peripheral wall via the multiple vertical ribs, the contact area can be made smaller than when, for example, the entire inner peripheral surface of the stem tube contacts the outer peripheral surface of the cylinder peripheral wall. This allows the multiple vertical ribs to function as guides, allowing the stem to move more smoothly relative to the cylinder. Therefore, the discharge operation can be performed with a light force, further improving the discharge operability.

[0016] (3) The fixing ring may be removably attached to the cylinder, and the stem, the pressing head, the fixing ring and the stretch film may function as a unit combined separately from the cylinder.

[0017] In this case, the stem, the press-down head, the fixing ring and the stretch film can be pre-assembled as one unit during manufacturing, and can be attached to the cylinder as a unit, which makes handling easier and improves manufacturing efficiency. Effect of the Invention

[0018] According to the present invention, a dispenser can be provided that can ensure stable operability and dispense contents even when the contents contain solid matter, and that can contribute to reducing the amount of synthetic resin used. [Brief description of the drawings]

[0019] [Figure 1] 1 is a vertical cross-sectional view showing an embodiment of a dispenser according to the present invention. [Diagram 2] 2 is a vertical cross-sectional view showing a state in which the press-down head shown in FIG. 1 is pressed down. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a dispenser according to the present invention will be described with reference to the drawings. As shown in FIG. 1, the dispenser 1 of this embodiment is equipped with a cylindrical cylinder 10 which is combined with a mouth portion 3 of a container body 2 in which the contents are contained and whose interior is connected to the inside of the container body 2, a cylindrical stem 30 combined with the cylinder 10, and a push-down head 40 attached to the stem 30.

[0021] Unless otherwise specified, each component part of the dispenser 1 is a molded product made of a synthetic resin material. Furthermore, the contents contained in the container body 2 are not particularly limited, but may suitably be, for example, a liquid food having fluidity containing solids, a liquid cosmetic, or a compound having fluidity containing an abrasive (solid).

[0022] In this embodiment, the cylinder 10 and the stem 30 are disposed coaxially with the central axis (container axis O) of the container body 2. Hereinafter, the push-down head 40 side along the container axis O will be referred to as the upper side, and the container body 2 side along the container axis O will be referred to as the lower side, and the direction along the container axis O will be referred to as the up-down direction. Furthermore, in a plan view seen from the up-down direction, the direction intersecting the container axis O will be referred to as the radial direction, and the direction going around the container axis O will be referred to as the circumferential direction. Furthermore, within the radial direction, the direction in which a nozzle tube 43, described later, protrudes from the push-down head 40 will be referred to as the forward direction.

[0023] (Container body) The container body 2 may be in various forms, such as a pouch, a bag-in-box, a double container (also called a delaminated container or a peelable laminated container), etc. In the illustrated example, a container body 2 having a spout-shaped opening 3 is shown. A male thread 4 is formed on the outer circumferential surface of the mouth 3 of the container body 2. An attachment cap 20 for combining the cylinder 10 with the mouth 3 of the container body 2 is attached to the mouth 3 of the container body 2.

[0024] (Attachment cap) The mounting cap 20 comprises an mounting tube 21 that surrounds the mouth 3 of the container body 2 from the radial outside, and an annular cap top wall 22 that protrudes radially inward from the upper end of the mounting tube 21, and is arranged coaxially with the container axis O.

[0025] A female threaded portion 23 that screws into the male threaded portion 4 formed on the mouth portion 3 of the container body 2 is formed on the inner peripheral surface of the attachment tube 21. As a result, the attachment cap 20 is attached to the mouth portion 3 of the container body 2 by screwing the male threaded portion 4 and the female threaded portion 23 together through a screw connection. However, the method of attaching the attachment cap 20 is not limited to screw connection, and it may be attached to the mouth portion 3 of the container body 2 by, for example, undercut fitting. The cap top wall 22 is positioned on the upper opening edge of the mouth 3 of the container body 2, sandwiching a gasket 24 and a flange portion 14 of the cylinder 10 described later, and presses the gasket 24 and the flange portion 14 against the upper opening edge of the mouth 3.

[0026] (Cylinder) The cylinder 10 comprises a cylinder peripheral wall 11 arranged inside the mounting cap 20, an annular lower valve seat portion 12 protruding radially inward from the lower edge of the cylinder peripheral wall 11, and a suction tube 13 extending downward from the lower valve seat portion 12. The cylinder peripheral wall 11 is positioned inside the mouth 3 of the container body 2 with its lower end located below the cap top wall 22, and is formed so that most of it, including its upper end, extends upward beyond the cap top wall 22.

[0027] An annular flange portion 14 that protrudes radially outward is formed on a portion of the cylinder peripheral wall 11 that is located below the cap top wall 22. The flange portion 14 is disposed on the upper opening edge of the mouth portion 3 of the container body 2 via a packing 24. As a result, the entire cylinder 10 is combined with the mouth portion 3 of the container body 2 via the mounting cap 20 as described above.

[0028] The inside of the lower valve seat 12 functions as an inflow hole 15 through which the contents flow, and connects the inside of the cylinder 10 with the inside of the container body 2. The inflow hole 15 is disposed coaxially with the container axis O, and is formed, for example, in a circular shape in a plan view. The suction tube 13 is formed in a cylindrical shape with a diameter smaller than that of the cylinder peripheral wall 11. However, this is not limited to this case, and the diameter of the suction tube 13 may be equal to the diameter of the cylinder peripheral wall 11. The upper end of a suction pipe 16 that sucks up the contents inside the container body 2 is fitted into the inside of the suction tube 13. The lower end opening of the suction pipe 16 is located near the bottom of the container body 2.

[0029] A fixing ring 50 is attached to a portion of the cylinder peripheral wall 11 that is located above the cap top wall 22, surrounding the cylinder peripheral wall 11 from the outside in the radial direction. The fixing ring 50 comprises a ring body 51 attached to the outer peripheral surface of the cylinder peripheral wall 11 by undercut fitting, and an annular flange portion 52 protruding radially outward from the lower end of the ring body 51, and is arranged coaxially with the container axis O.

[0030] In the illustrated example, the fixing ring 50 is attached to the cylinder peripheral wall 11 so as to be located above the mounting cap 20 with a small gap between them. However, this is not limited to this case, and for example, the fixing ring 50 may be attached to the cylinder peripheral wall 11 in a state where it is in contact with the mounting cap 20 from above. The flange portion 52 is formed in a circular shape that is smaller than the outer diameter of the mounting cap 20 .

[0031] The suction valve 60, which is the lower valve body, is accommodated inside the cylinder peripheral wall 11 of the cylinder 10 configured as described above, and also accommodates a coil spring 70 (the biasing member according to the present invention).

[0032] (Suction valve) The suction valve 60 comprises a fitting tube 61 fitted into the inside of the cylinder peripheral wall 11, a regulating portion 62 positioned above the fitting tube 61, and a suction valve body 63 arranged inside the fitting tube 61 and opening and closing the inlet hole 15 of the cylinder 10.

[0033] The regulating portion 62 comprises a pair of side plates that face radially across the container axis O, a middle plate that connects the pair of side plates to each other, and a top plate that is integrally connected to the upper ends of the pair of side plates and the middle plate. The pair of side plates and the middle plate are formed so that their overall shape is H-shaped when viewed in a plan view from the direction of the container axis O. The pair of side plates and the middle plate have the same length in the up-down direction, and their respective up-down positions are the same.

[0034] The suction valve body 63 is formed in a disk shape arranged coaxially with the container axis O, and is seated on the lower valve seat 12 so as to be able to retract from above, thereby closing the inlet hole 15. A plurality of elastic connecting pieces 64 are connected between the outer peripheral edge of the suction valve body 63 and the inner peripheral surface of the fitting cylinder 61 at intervals in the circumferential direction, so as to support the suction valve body 63 in an elastically displaceable manner.

[0035] The suction valve 60 configured as described above functions as a check valve in that the suction valve main body 63 closes the inlet hole 15 when the storage chamber R described below is pressurized, and opens the inlet hole 15 when the storage chamber R is depressurized. This makes it possible to restrict the outflow of contents from the storage chamber R into the container body 2 through the inlet hole 15 when the storage chamber R is pressurized, and also makes it possible to allow the contents to flow from the container body 2 into the storage chamber R through the inlet hole 15 when the storage chamber R is depressurized.

[0036] The restricting portion 62 functions as a safety member that restricts excessive downward movement of the press-down head 40 and the stem 30. However, in this embodiment, the stem 30 comes into contact with the upper end of the ring body 51 of the fixing ring 50, so that the downward movement of the press-down head 40 and the stem 30 can be restricted.

[0037] (coil spring) A coil spring 70 is disposed between the suction valve 60 and the stem 30 configured as described above, which urges the stem 30 upward when the stem 30 moves downward. Specifically, the coil spring 70 is disposed between the top wall portion of the fitting cylinder 61 of the suction valve 60 and an upper valve seat portion 32 (described later) of the stem 30, in a state in which the coil spring 70 surrounds the restricting portion 62 of the suction valve 60 from the outside in the radial direction. The coil spring 70 elastically deforms when the stem 30 moves downward, and urges the stem 30 upward by utilizing its elastic restoring force.

[0038] The coil spring 70 only needs to urge the stem 30 upward at least when the stem 30 moves downward. The coil spring 70 may be made of metal, depending on the type of contents, but is preferably made of resin from the standpoint of environmental impact.

[0039] (Stem) The stem 30 is disposed coaxially with the container axis O, and is assembled to the upper end of the cylinder peripheral wall 11 so as to be movable downward relative to the cylinder peripheral wall 11. The stem 30 comprises a stem tube 31 that surrounds the cylinder peripheral wall 11 from the radially outside, an annular upper valve seat portion 32 that protrudes radially inward from the upper end of the stem tube 31, and a protruding tube 33 that extends upward from the upper valve seat portion 32.

[0040] In the normal state before being pressed down, the stem tube 31 is disposed at a position where the lower end portion surrounds the cylinder peripheral wall 11 from the radial outside. As a result, the entire stem 30 is disposed above the mouth 3 of the container body 2 while surrounding the cylinder 10 from the radial outside.

[0041] Furthermore, vertical ribs 34 that protrude radially inward and extend vertically are formed on the inner peripheral surface of the stem tube 31. The vertical ribs 34 extend linearly downward from the upper end of the stem tube 31. Furthermore, multiple vertical ribs 34 are formed at regular intervals in the circumferential direction. The multiple vertical ribs 34 of the stem tube 31 are disposed with a small gap between them and the outer peripheral surface of the cylinder peripheral wall 11. Therefore, the stem tube 31 is guided along the cylinder peripheral wall 11, and the multiple vertical ribs 34 can function as guides. This allows the stem tube 31 to move smoothly up and down relative to the cylinder 10.

[0042] The inside of the stem tube 31 described above functions as a storage chamber R that cooperates with the inside of the cylinder 10 to store the contents.

[0043] The inside of the upper valve seat 32 functions as a discharge hole 35 through which the contents flow, and connects the inside of the storage chamber R to the inside of a nozzle cylinder 43 described later. The discharge hole 35 is disposed coaxially with the container axis O, and is formed, for example, in a circular shape in a plan view. A ring-shaped retaining protrusion 36 that protrudes downward is formed on the lower surface of the upper valve seat 32. The upper end of a coil spring 70 is fitted inside the retaining protrusion 36 in a state where it contacts the upper valve seat 32 from below. With the upper end of the coil spring 70 fitted inside the retaining protrusion 36, the coil spring 70 is stabilized in position, suppressing, for example, unintended displacement or tilt. As a result, the coil spring 70 is disposed in a stable position between the top wall of the fitting cylinder 61 of the suction valve 60 and the upper valve seat 32 of the stem 30.

[0044] The protruding tube 33 is formed, for example, in a cylindrical shape having a smaller diameter than the stem tube 31. However, this is not limited to this case, and the diameter of the protruding tube 33 may be equal to the diameter of the stem 30. Inside this protruding tube 33, a discharge valve 80, which is an upper valve body, is accommodated.

[0045] (Discharge valve) The discharge valve 80 includes a fitting cylinder 81 fitted inside the protruding cylinder 33 , and a discharge valve body 82 disposed inside the fitting cylinder 81 for opening and closing the discharge hole 35 of the stem 30 .

[0046] The discharge valve body 82 is formed in a disk shape arranged coaxially with the container axis O, and is seated on the upper valve seat 32 so as to be able to retract from above, thereby closing the discharge hole 35. A plurality of elastic connecting pieces 83 that support the discharge valve body 82 so as to be elastically displaceable are connected between the outer circumferential edge of the discharge valve body 82 and the inner circumferential surface of the fitting cylinder 81 at intervals in the circumferential direction.

[0047] The discharge valve 80 configured as described above functions as a check valve in that the discharge valve body 82 opens the discharge hole 35 when the storage chamber R is pressurized, and closes the discharge hole 35 when the storage chamber R is depressurized. This allows the contents to flow out from the storage chamber R through the discharge hole 35 into the nozzle tube 43 when pressure is applied inside the storage chamber R, and makes it possible to restrict the contents from flowing in from the nozzle tube 43 into the storage chamber R through the discharge hole 35 when pressure is applied inside the storage chamber R.

[0048] (Pressing head) The push-down head 40 is formed in a cylindrical shape with a top having a head top wall 41 and a head peripheral wall 42, and is attached to the upper end of the stem 30 in a state of being arranged coaxially with the container axis O. The head peripheral wall 42 surrounds the stem tube 31 from the outside in the radial direction and is fitted to the outer circumferential surface of the stem tube 31. In this way, the push-down head 40 is integrally combined with the upper end of the stem 30.

[0049] Furthermore, the press-down head 40 is provided with a nozzle cylinder 43 that extends forward (radially outward) from the head peripheral wall 42. The nozzle cylinder 43 is formed with a length that protrudes forward beyond the mounting cap 20. However, the length of the nozzle cylinder 43 is not particularly limited, and may be, for example, a length that does not protrude radially outward beyond the mounting cylinder 21 of the mounting cap 20. The inside of the nozzle cylinder 43 communicates with the discharge hole 35 through the inside of the head peripheral wall 42. At the tip of the nozzle cylinder 43, a nozzle port 44 is formed for discharging the contents to the outside.

[0050] The push-down head 40 configured as described above can be pushed down together with the stem 30. Therefore, the stem 30 can move downward relative to the cylinder 10 while pressurizing the inside of the storage chamber R as the push-down head 40 is pushed down.

[0051] (Stretch film) In the dispenser 1 configured as described above, the stem 30 integrally combined with the push-down head 40 and the fixing ring 50 attached to the cylinder 10 are vertically connected via an elastic film 90. The stretch film 90 is stretchable and deformable (elastically deformable) at least in the vertical direction, and covers the entire circumference of the cylinder peripheral wall 11 from the outside in the radial direction. Specifically, the stretch film 90 is formed so as to cover the entire circumference of the cylinder peripheral wall 11, the ring body 51 of the fixing ring 50, and the stem tube 31 from the outside in the radial direction. The upper end of the stretch film 90 is integrally fixed to the outer circumferential surface of the stem tube 31, for example, by adhesion. The lower end of the stretch film 90 is integrally fixed to the outer circumferential surface of the ring body 51, for example, by adhesion.

[0052] As a result, the stretchable film 90 vertically connects the stem 30 and the fixing ring 50 while keeping the inside airtight. Therefore, even if the contents flow out from the inside of the storage chamber R to the outside of the cylinder peripheral wall 11, it is possible to keep the contents inside the stretchable film 90.

[0053] The stretchable film 90 refers to a film that does not impede the pressing operation of the press-down head 40 or the elastic restoration deformation of the coil spring 70. Examples of the stretchable film 90 include shrink films, stretch films, and films with heat sealability. The thickness of the stretchable film 90 is not particularly limited, but may be within a range of 10 to 300 μm, for example. Of these, a thickness within a range of 10 to 100 μm is more preferable.

[0054] The resin material constituting the stretch film 90 is not particularly limited, but may be, for example, the following resin materials: Furthermore, the stretch film 90 may be decorated (for example, by printing, etc.).

[0055] Examples of the resin material that constitutes the stretch film 90 include the following. Polyester (polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polycarbonate (PC), etc.) Polystyrene (general-purpose polystyrene (GPPS), high-impact polystyrene (HIPS), etc.) · Polyolefin (Polyethylene (PE), Polypropylene (PP), etc.) Polyamide (nylon-6, nylon-66, etc.) Polyacrylonitrile (PAN) Polyimide (PI) Polyvinyl chloride (PVC) Polymethyl methacrylate (PMMA) Polyethersulfone (PES) Furthermore, the stretchable film 90 may be made of one or more layers of stretched or unstretched film made of the above-mentioned resin materials, or may be a film made of a mixed resin containing any of the resin materials.

[0056] In addition, the stretch film 90 has a water vapor permeability of 300 g / (m 2 d) or less, oxygen permeability 10000ml / (m 2 ·d·Mpa) or less, but water vapor permeability of 10g / (m 2 ·d) Below, oxygen permeability 10ml / (m 2 ·d·Mpa) or less, and furthermore, the water vapor permeability is 1.0g / (m 2 ·d) Below, oxygen permeability 1.0ml / (m 2 It is preferable that the pressure is less than 1.5MPa.

[0057] In addition, the stretch film 90 itself may have high water vapor permeability and oxygen permeability, and in order to impart these functions, a metal thin film such as aluminum, or a resin film such as polyvinylidene chloride (PVDC) or ethylene-vinyl alcohol copolymer (EVOH) may be used as a barrier layer, or a vapor deposition layer (or sputtering) of aluminum, aluminum oxide, silica, or other inorganic oxides may be used. The stretch film 90 may be a laminate of a base film made of the above-mentioned resin material and the above-mentioned barrier film, or may be a laminate in which, for example, one barrier layer is interposed between two base film layers.

[0058] (Ejector Action) Next, a case where the content is discharged using the dispenser 1 configured as described above will be described. In the initial state, the contents are stored in the storage chamber R shown in Fig. 1. Furthermore, the suction valve 60 is closed to block the inlet hole 15, and the discharge valve 80 is closed to block the discharge hole 35.

[0059] In such an initial state, when discharging the contents, the push-down head 40 is pushed downward as indicated by the arrow F, as shown in Fig. 2. This allows the stem 30 to be pushed down together with the push-down head 40 against the upward bias (elastic restoring force) of the coil spring 70, and the stem 30 can be moved downward relative to the cylinder 10. As a result, the interior of the storage chamber R can be pressurized as the stem 30 moves downward.

[0060] Therefore, the content in the storage chamber R can be supplied into the nozzle cylinder 43, and the content can be discharged to the outside through the nozzle port . Specifically, when the inside of the storage chamber R is pressurized, the discharge valve 80 can be opened as shown in Fig. 2 while the suction valve 60 is closed. Therefore, the content in the storage chamber R can be supplied into the nozzle cylinder 43 through the discharge hole 35. Therefore, when the press-down head 40 is pressed down, the content in the storage chamber R can be smoothly discharged to the outside.

[0061] When the stem 30 moves downward, the stretch film 90 that connects the stem 30 and the fixing ring 50 vertically is deformed so as to be crushed at least vertically. This prevents the stretch film 90 from affecting the downward movement of the stem 30.

[0062] Next, when the pressing operation of the pressing head 40 is released after the content is discharged, the stem 30 and the pressing head 40 can be moved upward and restored relative to the cylinder 10 while stretching the stretchable film 90 due to the upward bias (elastic restoring deformation) of the coil spring 70. This allows the pressure inside the storage chamber R to be reduced (negative pressure).

[0063] Therefore, new contents can be sucked up from inside the container body 2 into the storage chamber R and stored therein, making it possible to prepare for the next discharge. Specifically, when the pressure inside the storage chamber R is reduced, the suction valve 60 can be opened while the discharge valve 80 is closed, so that new contents can be sucked up from inside the container body 2 through the inlet hole 15 and stored in the storage chamber R. Therefore, an appropriate amount of contents can be smoothly stored in the storage chamber R.

[0064] In addition, since the elastic film 90 stretches with the restoration movement of the stem 30 in the upward direction, when the stem 30 and the push-down head 40 reach their original positions, further upward movement is suppressed by the elastic film 90. Therefore, it is possible to position the stem 30 and the push-down head 40 in their original positions.

[0065] In particular, in the dispenser 1 of this embodiment, the stem 30 combined with the cylinder 10 is moved downward by pressing down the pressurized storage chamber R to dispense the contents. Therefore, unlike the conventional configuration in which the piston slides in the cylinder 10 with the operation of the pressurized head 40, even if the contents contain solid matter, the operability is not affected by the solid matter. Therefore, even if the contents contain solid matter such as an abrasive, the contents can be dispensed while ensuring stable operability. Furthermore, since a piston is not required, the push-down head 40 can be pushed down with a lighter force than when a piston is used. This allows the dispenser 1 to have excellent discharge operability. Moreover, since the outer peripheral surface of the cylinder 10 can be used to guide the movement of the stem 30, the stem 30 and the push-down head 40 can be pushed down stably and smoothly. This also allows the dispenser 1 to have excellent discharge operability.

[0066] Furthermore, for example, during manufacturing, by changing the vertical length of the stretch film 90 that vertically connects the stem 30 and the fixing ring 50, the downward stroke (amount of movement) of the stem 30 can be easily changed without replacing the main components. This makes it possible to easily change the amount of content discharged depending on the application, etc., making the dispenser 1 applicable to a variety of applications. Furthermore, because it is a simple structure in which the stem 30 combined with the pressing head 40 and the fixed ring 50 attached to the cylinder 10 are connected vertically by the stretchable film 90, the number of parts can be reduced compared to the conventional method, and the amount of synthetic resin can be reduced, which contributes to reducing the environmental load.

[0067] Furthermore, since the multiple vertical ribs 34 of the stem tube 31 are installed with a small gap between them and the outer peripheral surface of the cylinder peripheral wall 11, they are guided along the cylinder peripheral wall 11, and the multiple vertical ribs 34 can function as guides. This allows the stem 30 to move more smoothly relative to the cylinder 10. This allows the discharge operation to be performed with a light force, further improving the discharge operability.

[0068] Furthermore, the fixing ring 50 is attached to the cylinder 10 by undercut fitting, and is therefore removable. Therefore, the stem 30 incorporating the discharge valve 80, the push-down head 40, the fixing ring 50, and the stretchable film 90 can function as a single unit assembled separately from the cylinder 10 assembled to the mouth portion 3 of the container body 2. Therefore, when manufacturing the dispenser 1, the above components can be preassembled as one unit, and can be attached as a unit to the cylinder 10. This makes handling easy and improves manufacturing efficiency.

[0069] Furthermore, various kinds of product information regarding the dispenser 1, contents, etc. can be indicated on the stretch film 90 by, for example, printing, etc. This makes it possible to eliminate the need to indicate information on the container body 2, for example.

[0070] Although the embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. This embodiment can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. In addition, modifications in each embodiment may be appropriately combined. Furthermore, this embodiment and its modifications include, for example, those that a person skilled in the art can easily imagine, those that are substantially the same, those within the scope of equivalents, and the like.

[0071] For example, in the above embodiment, the case where multiple vertical ribs 34 are formed on the inner peripheral surface of the stem 30 has been described as an example, but these vertical ribs 34 are not essential and may not be provided. Furthermore, when multiple vertical ribs 34 are formed, multiple vertical grooves in which the multiple vertical ribs 34 are housed may be formed on the outer peripheral surface of the cylinder 10, for example. In this case, the contents can be discharged while suppressing unintended rotation of the stem 30 and the push-down head 40 in the circumferential direction relative to the cylinder 10.

[0072] In the above embodiment, the suction valve 60 and the discharge valve 80 do not need to be so-called multi-point valves, and may employ a known valve structure (check valve). [Explanation of symbols]

[0073] R…Storage chamber 1...Dispenser 2…Container body 3…Mouth of container body 10...Cylinder 30…Stem 34...Vertical ribs 40…Pressing head 43…Nozzle tube 50…Fixed ring 60...Suction valve 70... Coil spring (biasing member) 80…Discharge valve 90...Stretch film

Claims

1. a cylindrical cylinder that is combined with an opening of a container body in which contents are accommodated and whose inside is in communication with the inside of the container body; A cylindrical stem that is combined with the upper end of the cylinder so as to be movable downward relative to the cylinder, and the inside of the stem functions as a storage chamber in cooperation with the inside of the cylinder; A press-down head is attached to the upper end of the stem and has a nozzle tube for discharging the contents to the outside; a biasing member provided in the storage chamber and biasing the stem upward when the stem moves downward; a suction valve that restricts the movement of the contents from the storage chamber toward the container body when the storage chamber is pressurized, and allows the movement of the contents from the container body toward the storage chamber when the storage chamber is depressurized; a discharge valve that allows the movement of the contents from the storage chamber toward the nozzle cylinder when the storage chamber is pressurized, and restricts the movement of the contents from the nozzle cylinder toward the storage chamber when the storage chamber is depressurized, The stem is assembled to surround the cylinder from the outside in the radial direction, and moves downward while pressurizing the storage chamber in response to the pressing operation of the pressing head, A fixing ring is attached to the cylinder so as to surround the cylinder from the outside in the radial direction, The stem and the fixing ring are capable of expanding and contracting at least in the vertical direction, and are connected vertically via a stretchable film that covers the entire circumference of the cylinder from the radial outside.

2. 2. The dispenser of claim 1, A plurality of vertical ribs are formed on the inner peripheral surface of the stem at intervals in the circumferential direction, the vertical ribs protruding radially inward and extending in the up-down direction, The stem contacts an outer peripheral surface of the cylinder via the longitudinal ribs.

3. The dispenser according to claim 1 or 2, The fixing ring is removably attached to the cylinder, The dispenser, wherein the stem, the push-down head, the fixing ring and the stretch film function as a combined unit separate from the cylinder.

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