WO2017086255A1 - 逆止弁構造、それを用いたノズル部材およびスクイズ容器 - Google Patents
逆止弁構造、それを用いたノズル部材およびスクイズ容器 Download PDFInfo
- Publication number
- WO2017086255A1 WO2017086255A1 PCT/JP2016/083585 JP2016083585W WO2017086255A1 WO 2017086255 A1 WO2017086255 A1 WO 2017086255A1 JP 2016083585 W JP2016083585 W JP 2016083585W WO 2017086255 A1 WO2017086255 A1 WO 2017086255A1
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- WIPO (PCT)
- Prior art keywords
- valve body
- outer edge
- nozzle
- valve seat
- elastic
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D47/00—Closures with filling and discharging, or with discharging, devices
- B65D47/04—Closures with discharging devices other than pumps
- B65D47/20—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
- B65D25/38—Devices for discharging contents
- B65D25/40—Nozzles or spouts
- B65D25/42—Integral or attached nozzles or spouts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D47/00—Closures with filling and discharging, or with discharging, devices
- B65D47/04—Closures with discharging devices other than pumps
- B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
- B65D47/18—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages for discharging drops; Droppers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D47/00—Closures with filling and discharging, or with discharging, devices
- B65D47/04—Closures with discharging devices other than pumps
- B65D47/20—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge
- B65D47/2018—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge comprising a valve or like element which is opened or closed by deformation of the container or closure
- B65D47/2056—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge comprising a valve or like element which is opened or closed by deformation of the container or closure lift valve type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D49/00—Arrangements or devices for preventing refilling of containers
- B65D49/02—One-way valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D83/00—Containers or packages with special means for dispensing contents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D83/00—Containers or packages with special means for dispensing contents
- B65D83/0055—Containers or packages provided with a flexible bag or a deformable membrane or diaphragm for expelling the contents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/14—Check valves with flexible valve members
Definitions
- the present invention relates to a check valve structure, a nozzle member using the check valve structure, and a squeeze container.
- Patent Documents 1, 2, and 3 disclose a check valve structure including a valve seat, a support body, and a flat valve body supported therebetween. Both valve bodies are supported so that the center of the valve body protrudes in the direction from upstream (inside the container) to downstream (outside the container). Therefore, when receiving pressure from upstream to downstream, the center of the valve body is deformed so as to protrude further, and the fluid flows around the valve body.
- Patent Documents 4 and 5 disclose a check valve structure including a valve body having a notch formed in the center. Therefore, when the pressure from upstream to downstream is received, the notch at the center of the valve body is opened, and when the reverse pressure is received, the notch at the center of the valve body is closed. Patent Document 5 describes the effect of drawing back the liquid remaining in the nozzle by returning the original shape of the valve body.
- An object of the present invention is to provide a check valve structure and a squeeze container using the same, which not only prevent the back flow of fluid but also does not discharge fluid against an unintended pressure in the correct direction.
- the check valve structure of the present invention comprises an annular valve seat on the upstream side, an annular support portion on the downstream side, and an elastic valve body fixed between them; An outer edge portion and an inner portion surrounded by the outer edge portion; a passage between the valve seat and the support portion is formed by elastic contact between the valve seat and the outer edge portion of the elastic valve body in an annular shape.
- the closed state of the passage is maintained with respect to the pressure of the fluid from downstream; the inner portion of the elastic valve body is deformed toward the downstream side with respect to the pressure of the fluid from upstream;
- the outer edge of the elastic valve body is elastically deformed by the further pressure of the fluid, and the contact between the valve seat and the outer edge of the elastic valve body is partially released to open the passage. It is a feature.
- an annular upstream support portion of the valve seat that supports an outer edge portion of the elastic valve body in contact with an upstream end surface of the outer edge portion, and downstream of the outer edge portion Fixed to the annular downstream support portion of the support portion that abuts and supports the end face on the side; the passage is upstream of the upstream support portion of the valve seat and the outer edge portion of the elastic valve body Closed by an annular contact with the end surface of the ring; a downstream end surface of the annular outer edge portion or an annular downstream support portion of the support portion is provided with a communication passage communicating between the inside and the outside Is preferred.
- the elastic valve body is sandwiched between the valve seat and the support portion, and the downstream support portion is formed with a recess portion that constitutes the communication path.
- the notch which comprises the said communicating path may be formed in the end surface of the downstream of the said elastic valve body.
- a plurality of communication paths such as recesses or notches are provided in a ring shape at equal intervals.
- the elastic valve body is sandwiched between the valve seat and the support portion, and the upstream support portion of the valve seat is the upper end opening of the valve seat.
- the elastic valve body is sandwiched between the valve seat and the support part, and at least a part of the outer edge part is thicker than the inner part.
- the elastic valve body is sandwiched between the valve seat and the support portion, and at least a part of the outer edge portion of the elastic valve body is thicker than the inner side portion, and the upstream support portion is What is an annular inner flange formed on the inner surface of the valve seat is preferable. It is preferable that the elastic valve body is sandwiched between the valve seat and the support portion, and the outer peripheral end of the outer edge portion is sandwiched.
- an outer edge portion of the elastic valve body is a cylindrical body; a flange portion in which an upstream support portion of the valve seat extends from an inner surface of the valve seat, and a downstream portion from the flange portion
- An inner cylinder portion extending; one of the inner cylinder portion and the outer edge portion is inserted into the other, the other inner surface and one outer surface are engaged to fix the elastic valve body, and the other inner surface It is preferable that the passage is closed by annular contact with one outer surface.
- the elastic valve body is fixed by engagement with the valve seat, the inner cylinder portion is inserted into the outer edge portion, and the upstream surface of the inner side portion of the elastic valve body and the valve There is a gap between the inner cylindrical portion of the seat (the downstream end thereof), and the upstream end surface of the outer edge portion of the elastic valve body and the upper surface (downstream surface of the flange portion of the valve seat) ) are preferred.
- the check valve structure of the present invention is such that at least a part of the inner part is thin. In such a case, it is preferable that the inner portion is curved so as to protrude upstream.
- the nozzle member of the present invention is attached to the opening of a flexible container, and is provided on the downstream side of the check valve structure according to any one of the present invention and the support portion of the check valve structure. And a nozzle.
- a nozzle comprises a cylindrical nozzle plug, a cylindrical valve seat inserted into the nozzle plug, and the elastic valve body fixed therebetween, and the nozzle plug It is preferable that the support portion and the nozzle are provided, and the valve seat body includes the valve seat. It is preferable that the nozzle member be a droplet nozzle.
- a first aspect of the squeeze container of the present invention is characterized by including a flexible container and the nozzle member according to any one of the present invention.
- a second aspect of the squeeze container of the present invention is characterized by having a flexible container including a nozzle and the check valve structure according to any one of the present invention.
- the nozzle is preferably a droplet nozzle.
- the elastic valve body has an annular outer edge portion and an inner portion surrounded by the outer edge portion, and the outer edge portion is restrained (supported) by the support portion and the elastic valve body, Since the elastic valve body is deformed in two stages in order from the upstream side to the pressure of the fluid from the upstream side, it does not open easily even if unexpected pressure is applied to the elastic valve body. Moreover, when using for things, such as a container which users, such as a squeeze container, operate the discharge amount (flow rate), the individual difference of the discharge amount (flow rate) can be made small, and it is preferable.
- the liquid of the support can be pulled back by returning the original shape of the inner portion (first deformation).
- a discharge container squeeze container
- the elastic valve body is fixed by sandwiching the outer edge portion of the elastic valve body between the annular upstream support portion of the valve seat and the annular downstream support portion of the support portion.
- a seal structure is formed by annular contact between the upstream support portion of the valve seat and the upstream end surface of the outer edge portion of the elastic valve body, and the downstream end surface of the downstream support portion of the support portion and the outer edge portion of the elastic valve body.
- the elastic valve body is sandwiched between the valve seat and the support portion, and the recess portion constituting the communication path is formed in the downstream support portion, or downstream of the elastic valve body.
- the notch which comprises the said communicating path is formed in the end surface of the side, a communicating path can be formed easily.
- the sandwiched elastic valve body is unlikely to be distorted and can be reliably sealed. Further, the fluid flowing through the check valve structure can be made to flow uniformly.
- the elastic valve body is sandwiched between the valve seat and the support portion, and the upstream support portion is the upper end opening of the valve seat, the sandwiching structure of the elastic valve body can be simplified.
- the elastic valve body is sandwiched between the valve seat and the support portion, and at least a part of the outer edge portion of the elastic valve body is thicker than the inner side portion, and the upstream support portion is In the case of the annular inner flange formed on the inner surface of the valve seat, since the elastic valve body is substantially accommodated in the valve seat, the elastic valve body can be easily handled in the assembly process.
- the inner surface of the upper part of the valve seat (above the inner flange) supports the elastic valve body in the radial direction.
- a check valve structure wherein the elastic valve body is fixed and sealed by engagement of one outer surface and the other inner surface of the outer edge portion of the elastic valve body and the inner cylindrical portion of the upstream support portion. Is formed, the entire structure is simple and assembly is easy.
- the elastic valve body is fixed by engagement with the support portion, and the inner cylinder portion is inserted into the outer edge portion, and the upstream surface of the inner side portion of the elastic valve body and the inner side of the valve seat
- a gap is formed between the cylindrical portion (the downstream end portion thereof), and an upstream end surface of the outer edge portion of the elastic valve body and an upper surface (downstream surface) of the flange portion of the valve seat. When there are gaps between them, fluid can be smoothly flowed by passing through the gaps.
- the elasticity of the inner part can be increased, and the amount of recall for the original shape return of the inner part can be increased. it can.
- a large difference can be provided between the pressure at which the inner portion is elastically deformed and the pressure at which the outer edge portion begins to be elastically deformed, and the play increases when the squeeze container or the like is compressed.
- the recall amount for returning to the original shape can be further increased.
- the nozzle member of the present invention includes the check valve structure according to any one of the present invention described above and the nozzle provided downstream of the support portion, the contents can be simply attached to a flexible container.
- a discharge container particularly a squeeze container, with a stable discharge amount (flow rate) can be obtained.
- a nozzle member comprises a cylindrical nozzle plug, a cylindrical valve seat inserted into the nozzle plug, and the elastic valve body fixed therebetween, and the nozzle plug
- the support portion and the nozzle are provided and the valve seat body includes the valve seat, it is easy to assemble. It is particularly preferable when the nozzle is a droplet nozzle.
- the 1st aspect of the squeeze container of this invention is equipped with the container which has flexibility, and the nozzle member of this invention
- the 2nd aspect of the squeeze container of this invention is a container provided with the nozzle which has flexibility. Since the check valve structure of the present invention provided in the container is provided, the contents do not flow back and are hygienic. In addition, when the contents are discharged by squeezing the container, there is little individual difference in the discharge amount. Further, after use, the liquid remaining in the vicinity of the nozzle can be prevented. In the case of the squeeze container according to the present invention, when the nozzle is a droplet nozzle, the supply amount to the droplet nozzle is stable, and thus the operation is simple.
- FIG. 2a is a side cross-sectional view of the nozzle member of the squeeze container of FIG. 1
- FIGS. 2b and 2c are side cross-sectional views of the nozzle plug of the nozzle member, and a bottom view of the upper bottom
- FIG. 2d is a valve seat of the nozzle member
- FIG. 2e is a side sectional view of the elastic valve body of the nozzle member.
- 3a and 3b are schematic views showing a first deformation state and a second deformation state of the elastic valve body of the nozzle member, respectively.
- 4a is a side sectional view showing another embodiment of the nozzle member of the squeeze container of the present invention, and FIG.
- FIG. 4b is a bottom view of the upper bottom portion of the nozzle plug.
- 5a is a side sectional view showing still another embodiment of the nozzle member of the squeeze container of the present invention
- FIG. 5b is a bottom view of the upper bottom portion of the nozzle plug
- FIG. 5c is the nozzle member of the squeeze container of the present invention.
- Fig. 5d is a side sectional view showing still another embodiment of the nozzle member of the squeeze container of the present invention
- Fig. 5e is a bottom view of the upper bottom portion of the nozzle plug.
- Fig. 6a is a side sectional view showing another embodiment of the nozzle member of the squeeze container of the present invention
- FIG. 6b is a bottom view of the upper bottom portion of the nozzle plug
- Fig. 6c is a first view of the elastic valve body of the nozzle member
- FIG. 6D and FIG. 6E are side cross-sectional views showing a part of still another embodiment of the nozzle member of the present invention.
- FIG. 7A is a side sectional view showing still another embodiment of the nozzle member of the squeeze container of the present invention
- FIG. 7B is a bottom view of the nozzle plug.
- the squeeze container 10 in FIG. 1 includes a flexible container 11 and a nozzle member 12 attached to the opening of the container 11.
- the nozzle member 12 is provided with a check valve structure 15 that is closed in a no-load state, blocks the flow of substances from the outside air, and allows the flow of contents from the container 11 (upstream).
- the check valve structure 15 is opened by elastic deformation of the elastic valve body 18 in two stages with respect to the pressure of the contents from the container 11.
- the container 11 is a container for a squeeze container that discharges an internal liquid by, for example, squeezing a body part to contract the inside. Then, a cap (not shown) is screwed into the opening and closed. The opening is provided with a nozzle connecting portion 11 a that is connected to the nozzle member 12.
- the container 11 may be elastically deformed to return to its original shape when the inside is contracted and deformed.
- the container 11 is preferably formed from a flexible material, particularly a material having elasticity so as to be elastically deformed. Further, for example, in addition to the one shown in FIG. 1, a double structure in which the inner container is crushed by discharging the contents may be used.
- the nozzle member 12 includes a cylindrical nozzle plug 16 that is fixed to the opening of the container 11, a cylindrical valve seat body 17 that is inserted into the nozzle plug 16, and those It consists of the elastic valve body 18 fixed between.
- the nozzle plug 16 is inserted into the opening of the container 11 and closes the opening. Specifically, as shown in FIG. 2b, a cylindrical nozzle base 21, an upper bottom 22 that closes the upper end thereof, and a cylindrical nozzle 23 that extends upward through the upper bottom 22 are provided.
- the nozzle plug 16 is formed from, for example, a synthetic resin.
- the nozzle base 21 is a cylinder that houses the valve seat body 17 and the elastic valve body 18.
- a cylindrical lower end 21 a of the nozzle base 21 is a nozzle connection portion that is connected to the nozzle connection portion 11 a of the container 11.
- the connection structure of this nozzle connection part 11a and a to-be-nozzle connection part is not specifically limited.
- FIG. 2 c an annular downstream support portion 24 that supports the elastic valve body 18 from the downstream side is provided on the lower surface.
- the downstream support portion 24 is formed so that the protruding portion 24a protruding upstream and the recessed portion 24b recessed downstream from the protruding portion 24a are alternated.
- the recessed portion 24 b constitutes a communication path that communicates the inside and outside of the downstream support portion 24.
- three protrusions 24a are provided at equal intervals in the circumferential direction.
- the imaginary line of FIG. 2c shows the outer edge part 18a of the elastic valve body 18 mentioned later.
- the configuration of the protruding portion 24a and the recessed portion 24b or the number of the protruding portions 24a and / or the recessed portions 24b is not particularly limited. .
- the nozzle 23 is a cylinder that serves as a discharge port for contents. In this embodiment, a droplet nozzle is used.
- the valve seat body 17 is inserted into the nozzle plug 16 so as to be coaxial with the nozzle plug 16.
- the upper end of the opening of the valve seat body 17 is an annular support protrusion (upstream support portion) 17a that supports the elastic valve body 18 with a sealing action, as shown in FIG. 2d.
- the support protrusion 17a has a substantially triangular cross section and has a sharp upper end.
- the lower part of the valve seat body 17 serves as a valve seat connection portion 17 b that is connected to the lower end 21 a of the nozzle base portion 21.
- the connection structure of the lower end (valve seat connecting portion) 21a and the valve seat connecting portion 17b is not particularly limited.
- the elastic valve body 18 includes a thick outer edge portion 18a and a thin inner portion 18b surrounded by the outer edge portion. That is, the inner portion 18b is more elastic and greatly deformed when it receives external force in the vertical direction than the outer edge portion 18a.
- the elastic valve body 18 is also provided coaxially with the nozzle plug 16 and the valve seat body 17.
- the elastic valve body 18 is molded from an elastic synthetic resin, synthetic rubber or the like.
- the outer edge portion 18 a is sandwiched between the downstream support portion 24 of the upper bottom portion 22 of the nozzle plug 16 and the support protrusion (upstream support portion) 17 a of the valve seat body 17. That is, as shown in FIG.
- the downstream end surface 18a1 of the outer edge portion 18a partially abuts the downstream support portion 24 (substantially the protruding portion 24a) of the nozzle plug 16, and the outer edge portion An end face 18a2 on the upstream side of 18a abuts on the entire circumference of the support protrusion 17a of the valve seat body 17.
- the outer edge portion 18a has an annular shape, but the shape is not particularly limited as long as it is annular.
- the inner portion 18b is an elastic plate that is curved so as to protrude upstream.
- the elastic valve body 18 is disposed such that a step portion 18c between the outer edge portion 18a and the inner portion 18b faces the downstream side.
- the inner side part 18b is exhibiting disk shape
- a shape is suitably selected according to an outer edge part.
- the outer edge portion 18a may be thicker than the inner portion 18b as long as the space between the nozzle plug 16 and the valve seat body 17 can be reliably sealed in an unloaded state.
- the outer edge portion 18a may not have a uniform thickness, and may have a portion thinner than the inner portion 18b as long as the outer edge portion 18a has a portion thicker than the inner portion in at least a part of the outer edge portion.
- the thick region is formed in an annular shape.
- the check valve structure 15 includes a support protrusion 17a (valve seat) of the valve seat body 17 on the upstream side, a downstream support portion 24 (support portion) of the upper bottom portion 22 of the nozzle plug 16 on the downstream side, and a space therebetween.
- the elastic valve body 18 is clamped and fixed to. In the no-load state, the upstream end face 18a2 of the outer edge of the elastic valve body 18 is in elastic contact with the valve seat (support protrusion 17a) in an annular shape, and the support protrusion 17a and the downstream support part 24 are in contact with each other. Is closed by the elastic valve body 18 (closed state).
- the elastic valve element 18 of the check valve structure 15 receives pressure from the downstream side (above the elastic valve element 18 in FIG. 1) of the elastic valve element 18, the inner portion 18b of the elastic valve element 18 receives the pressure. .
- the pressure does not affect the contact between the upstream end face of the outer edge portion 18a forming the seal and the support protrusion 17a of the valve seat body 17. Therefore, the above-described closed state is maintained.
- the elastic valve body 18 of the check valve structure 15 receives pressure from the upstream side of the elastic valve body 18, that is, for the contents from the container 11, as shown in FIG.
- the inner portion 18b of the body 18 receives the pressure F1 of the contents, and the inner portion 18b protruding upstream is deformed so as to protrude downstream (first deformation).
- transforms downstream it is comprised so that the center hole 22c of the nozzle plug 16 may not be block
- the outer edge portion 18a of the elastic valve body 18 has not yet been elastically deformed, the above-described closed state is maintained. As shown in FIG.
- the thickness of the outer edge portion 18a of the elastic valve body 18 is thicker than the thickness of the inner portion 18b, but may be substantially the same. Also in this case, the outer edge portion 18a is sandwiched and restrained between the nozzle plug 16 and the valve seat body 17, and thus is less likely to be deformed than the inner portion 18b. As a result, the two-stage deformation as described above occurs. However, it is preferable to provide a difference in elasticity between the outer edge portion 18a and the inner portion 18b because a high effect can be obtained regardless of how the elastic valve body 18 is mounted, and thus productivity is high.
- the first deformation of the inner portion 18b is an elastic deformation that returns to its original shape when the pressure F1 from the container is released.
- the deformation may not be restored when the pressure F1 is released.
- an elastic container 11 is used. That is, since the container 11 that has been compressed and deformed is elastically restored, the inside of the container 11 is in a reduced pressure state, and the inner portion 18b deformed downstream is restored to its original shape by the suction force. Thereby, the same liquid residue can be prevented.
- the check valve structure 15 of the nozzle member 12 is deformed (or elastically deformed) by the inner portion 18b to absorb small pressure because the elastic valve body 18 undergoes two-stage deformation according to the pressure.
- the valve does not open unnecessarily.
- individual differences in discharge amount can be reduced.
- the sealing action of the outer edge portion 18a and the support protrusion 17a returns, so that no substance is sucked from the outside air.
- the inner part 18b when the inner part 18b is elastically deformed after use, the inner part 18b protrudes upstream by the elastic force. Or when the inner side part 18b is deform
- the liquid in the nozzle 23 is attracted to the inside, so that liquid remaining near the opening of the nozzle 23 can be prevented.
- the inner portion 18b is curved toward the upstream side, a large amount of liquid can be attracted and liquid residue can be further prevented. Even if the inner portion 18b is flattened without being bent, the liquid remaining in the vicinity of the opening of the nozzle 23 due to the restoration of the original shape can be drawn.
- the squeeze container 30 in FIG. 4 has a smaller space (liquid reservoir space) on the downstream side than the elastic valve body as compared with the squeeze container 10 in FIG.
- the squeeze container 30 includes a container 11 similar to the squeeze container 10 of FIG. 1 and a nozzle member 31 attached to the opening.
- the nozzle member 31 includes a cylindrical nozzle plug 32 fixed to the opening of the container 11, a cylindrical valve seat body 33 inserted into the inside, and an elastic valve body 34 supported therebetween. Become. This nozzle member 31 is also provided with a check valve structure 15.
- the nozzle plug 32 is substantially the same as the nozzle plug 16 of the squeeze container of FIG. 1 except that the structure of the lower surface of the upper bottom portion 22 that supports the elastic valve body 34 from the downstream side is different.
- a plurality of projecting portions 36 arranged in an annular shape and a plurality of bulged portions 37 provided lower than the projecting portions 36 so as to surround the projecting portions 36 are provided on the lower surface of the upper bottom portion 22.
- a recessed portion 38 provided between the adjacent bulging portions 37 and extending from the outer edge to the center.
- the projecting portion 36 is a fan-shaped projection extending radially inward from the outer edge of the lower surface, and the projecting surface is a curved surface so that the projecting surface is flat toward the inner side in the radial direction. It consists of the inner convex part 36b which became.
- the bulging portion 37 is a fan-shaped projection surrounding the protruding portion 36. And the imaginary line of FIG. 4b becomes the cyclic
- the downstream support portion 35 includes an outer convex portion 36 a, a bulging portion 37, and a concave portion 38, and has irregularities with respect to the elastic valve body 34.
- the downstream support part 35 can ensure the communicating path from the outer edge of the lower surface of the upper bottom part 22 to the center hole 22c, the shape will not be specifically limited. However, by arranging a plurality of communication paths (indentations 38) extending from the outer edge toward the center hole 22c at equal intervals, the elastic valve body 34 is prevented from being distorted and the sealing performance is unlikely to deteriorate, and the contents are smoothly flowed. This is preferable. Since the protrusion part 36 (outer convex part 36a) extends to the outer edge, the outer peripheral end of the elastic valve body 34 can be firmly supported. Therefore, the elastic valve body 34 is not easily displaced during assembly, and the assembly process is facilitated.
- transformation of the outer peripheral end of the elastic valve body 34 can prevent the malfunction that the elastic valve body 34 slip
- the internal space (the space downstream from the elastic valve body 34) in the nozzle plug 32 can be reduced, that is, the liquid storage space can be reduced. it can.
- the valve seat body 33 is substantially the same as the valve seat body 17 in FIG. 1 except that the outer peripheral edge of the elastic valve body 34 is supported by a flat upper end surface (upstream support portion) 33a.
- the entire outer edge 18a of the elastic valve body 34 can be supported by the upper end surface 33a, and elastic deformation of the outer peripheral end of the elastic valve body 34 can be prevented.
- the elastic valve body 34 is the elastic valve shown in FIG.
- the inner portion 18b is a flat thin plate and that the step portion 18c between the outer edge portion 18a and the inner portion 18b faces the upstream side. It is substantially the same as the body 18.
- the amount of liquid withdrawn due to the return of the elastic valve element 34 to the original shape is reduced, but the liquid reservoir space can be reduced.
- the container 11 has elasticity, the container 11 is slightly restored after the contents are discharged, but the suction of the substance from the outside air is prevented by the check valve structure, so that the inside of the container 11 is in a reduced pressure state. Become. Therefore, the flat inner portion 18b receives a force that displaces upstream.
- the inner portion 18b may be curvedly displaced upstream as in the elastic valve body 18 of FIG. 1 in a no-load state.
- the amount of liquid drawn back can be increased.
- the inside of the container may be filled under reduced pressure.
- the inner portion 18b of the elastic valve body 34 can be curved so as to protrude upstream, like the inner portion 18b of the elastic valve body 18 of FIG. As a result, the amount of liquid drawn back can be increased.
- This nozzle member 31 also has a check valve structure similar to the nozzle member 12 of FIG. 1, and the elastic valve body 34 is opened in two stages with respect to the contents from the container.
- the check valve structure 15 includes an upper end surface 33a (valve seat) of the valve seat body 33 on the upstream side, a downstream support portion 35 (support portion) of the upper bottom portion 22 of the nozzle plug 32 on the downstream side, The elastic valve body 34 is clamped and fixed between them.
- the upstream end surface 18a2 of the outer edge portion of the elastic valve element 34 is in elastic contact with the upper end surface 33a in an annular manner, and the path between the upper end surface 33a and the downstream support portion 35 is The elastic valve body 34 is closed (closed state).
- the inner portion 18b is first elastically deformed toward the downstream side (first deformation) while the closed state is maintained.
- the outer edge portion 18a elastically deforms (second deformation) according to the irregularities of the downstream support portion 35 of the nozzle plug 32, and the upper end surface 33a (upstream support portion) and the elastic valve body
- the seal with 34 is released.
- the valve seat body 33 uses the upstream support portion as a contact surface (upper end surface 33a), not as a protrusion. Similar to the nozzle member 12 of FIG. 1, the valve is not opened unnecessarily, and is particularly preferably used for a squeeze container. In addition, after use, liquid remaining in the vicinity of the opening of the nozzle 23 due to the restoration of the original shape of the inner portion 18b can be prevented.
- the squeeze container 40 in FIG. 5 has a higher sealing performance in a no-load state than the squeeze containers 10 and 30 in FIGS.
- the squeeze container 40 includes a container 11 similar to the squeeze container 10 of FIG. 1 and a nozzle member 41 attached to the opening.
- the nozzle member 41 includes a cylindrical nozzle plug 42 that is fixed to the opening of the container 11, a cylindrical valve seat body 43 that is inserted into the nozzle plug 42, a valve seat body 43, and a nozzle plug And an elastic valve body 44 supported between the valve seat body 43 and the valve seat body 43.
- the nozzle plug 42 is formed with an annular outer groove 42 a into which the upper end of the valve seat body 43 is inserted at the outer end of the upper bottom 22, and the inner surface of the tip of the nozzle 23.
- 4 is substantially the same as the nozzle plug 32 of the squeeze container 30 of FIG. 4 except that it has a mortar shape or a trumpet shape, and a protruding portion 36, a bulging portion 37, and a recessed portion are formed on the lower surface of the upper bottom portion 22.
- 38 is provided with a downstream support portion 35 (a portion in contact with the downstream end face 18a1 of the elastic valve body 44).
- the nozzle connection part of the lower end 21a of the nozzle base 21 differs in shape from the nozzle connection part of FIG. 1, it does not specifically limit by connecting the container 11 and the nozzle member 12.
- the valve seat body 43 has a squeeze container shown in FIG. 2 except that an inner flange 43a for supporting the elastic valve body 44 is formed on the upper inner surface and that the upper end is inserted into the annular outer groove 42a of the nozzle plug 42.
- the valve seat body 17 is substantially the same. Since the inner flange 43 a that supports the elastic valve body 44 is formed on the upper inner surface, the elastic valve body 44 can be stably disposed regardless of the connection state of the nozzle plug 42 and the valve seat body 43. That is, the elastic valve body 44 can be supported in the planar direction on the valve seat body 43 before assembly (before connection). Therefore, an assembly (connection) process is easy. Further, the outer end portion of the outer edge portion 18a of the elastic valve body 44 can be pinched accurately.
- the height (thickness) of the outer edge portion 18a is higher (thicker) than the squeeze container 10 in FIG. 1 or the squeeze container 30 in FIG.
- This height can be appropriately selected according to the position of the inner flange 43a of the valve seat body 43 (depth from the upper end of the nozzle base 21).
- the sealing performance in the no-load state can be enhanced by increasing the height of the outer edge portion 18a by a certain level or more.
- the outer edge portion 18a may be configured to compressively deform downstream.
- the sealing performance is further enhanced in a no-load state.
- This nozzle member 41 also has a check valve structure similar to the nozzle member 31 of FIG. 3, and the elastic valve body 44 opens and deforms the contents from the container in two stages.
- the check valve structure 15 includes an inner flange 43a (valve seat) of the valve seat body 43 on the upstream side, a downstream support portion 35 (support portion) of the upper bottom portion 22 of the nozzle plug 42 on the downstream side, The elastic valve body 44 is clamped and fixed therebetween. In the unloaded state, the upstream end face 18a2 of the outer edge portion of the elastic valve body 44 is in elastic contact with the inner flange 43a in an annular manner, and the passage between the inner flange 43a and the downstream support portion 35 is It is closed by the elastic valve body 44 (closed state).
- the inner portion 18b is first elastically deformed toward the downstream side (first deformation) while the closed state is maintained.
- first deformation the end surface 18a1 on the downstream side of the outer edge 18a is elastically deformed so as to wave according to the irregularities on the outer peripheral edge of the nozzle plug 42, or the lower end portion of the outer edge 18a is compressively deformed.
- second deformation which elastic deformation is adopted can be appropriately selected according to the thickness of the outer edge portion or the like.
- the seal by the elastic valve body 44 is released by the second deformation of the outer edge portion 18a.
- the valve is not unnecessarily opened, and is particularly preferably used for a squeeze container.
- the check valve structure can prevent the inhalation of substances from the outside air, and can prevent liquid remaining near the opening of the nozzle 23 due to the original shape of the inner portion 18b. 5a and 5c, the inner portion 18b of the elastic valve body 44 may be curved so as to protrude upstream, like the inner portion 18b of the elastic valve body 18 of FIG. As a result, the amount of liquid drawn back can be increased.
- a notch 54a through which the contents pass is formed on the downstream side of the elastic valve element 54.
- the squeeze container 50 includes a container 11 similar to the squeeze container 10 of FIG. 1 and a nozzle member 51.
- the nozzle member 51 includes a cylindrical nozzle plug 52 that is fixed to the opening of the container 11, a cylindrical valve seat body 53 that is inserted into the nozzle member 52, a valve seat body 53, and a nozzle plug 52 It consists of the elastic valve body 54 supported between the valve seat bodies 53.
- the nozzle plug 52 has an outer convex portion 36a that faces the radially inner side from the vicinity of the outer edge, with the entire lower surface of the upper bottom portion 22 leaving an annular outer groove 52a, and is directed radially inward.
- 1 is substantially the same as the nozzle plug 16 of FIG. 1 except that the protruding portion 36 is composed of an inner convex portion 36b whose height gradually decreases.
- the downstream support part 35 includes the outer convex part 36a and the inner convex part 36b.
- the valve seat body 53 is substantially the same as the valve seat body 43 of the squeeze container 40 of FIG. 5a.
- the elastic valve body 54 is formed with a notch 54a extending radially inward from the outer edge on the upper surfaces of the outer edge 18a and the inner part 18b.
- the notch 54a serves as a communication path connecting the outer edge and the center hole 22c between the lower surface of the upper bottom portion 22 of the nozzle plug 52.
- Other configurations are substantially the same as the elastic valve body 44 of the squeeze container 40 of FIG. 5a.
- This nozzle member 51 is also provided with a check valve structure 15 similarly to the squeeze container 40 of FIG. 5a, and the elastic valve body 54 is deformed and opened in two stages with respect to the contents from the container. Therefore, the valve does not open unnecessarily. Further, after use, the liquid remaining in the vicinity of the opening of the nozzle 23 can be prevented by returning the original shape of the inner portion 18b.
- the squeeze container 60 of FIG. 6a includes a nozzle member 61 fixed by engaging an elastic valve body with a valve seat body.
- the squeeze container 60 includes a container 11 similar to the squeeze container 10 of FIG. 1 and a nozzle member 61 attached to the opening thereof.
- the nozzle member 61 includes a cylindrical nozzle plug 62 that is fixed to the opening of the container 11, a cylindrical valve seat body 63 that is inserted therein, and an elastic valve body 64 that is engaged with the valve seat body 63. It consists of.
- the nozzle plug 62 is substantially the same as the nozzle plug 42 of the squeeze container 40 of FIG. 5a, and a passage (concave portion 38) that connects the outer edge and the center hole is formed on the lower surface of the upper bottom portion 22. Yes (see FIG. 6b).
- the valve seat body 63 is substantially the same as the valve seat body 43 of the squeeze container 40 of FIG. 5a except that an inner cylindrical portion 63a extending in the downstream direction from the inner end of the inner flange 43a is formed. is there.
- the outer surface of the inner cylinder part 63a may be slightly inclined so as to expand in the upstream direction.
- the elastic valve body 64 includes a cylindrical outer edge portion 64a and a thin inner portion 64b that closes the upper end of the outer edge portion.
- the height of the outer edge portion 64 a is smaller than the distance between the inner flange 43 a and the downstream support portion 35 when the valve seat body 63 is attached to the nozzle plug 62. That is, the elastic valve body 64 is locked by fitting the outer edge portion 64a and the inner cylinder portion 63a in a state where the nozzle member 61 is assembled.
- annular gap S1 between the upper end (downstream end) of the inner cylindrical portion 63a of the valve seat 63 and the lower surface (upstream surface) of the inner portion 64b of the elastic valve body 64, and the valve
- annular gap S ⁇ b> 2 between the upper surface (downstream surface) of the inner flange 43 a of the seat body 63 and the upstream end surface 18 a ⁇ b> 2 of the outer edge of the elastic valve body 64.
- the gaps S1 and S2 do not have to be annular, and need not have a constant interval (height). For example, as shown in FIG.
- a protruding portion 63b may be provided on a part of the upper surface of the inner flange 43a, and a part of the gap S2 may be reduced.
- a protrusion 63c may be extended from the upper end of the inner cylinder portion 63a and may be brought into contact with a part of the inner portion 64b of the elastic valve body 64. That is, the gap S1 has a fan shape in plan view. Thereby, the elastic valve body 64 can be supported by the protrusion 63c.
- the shape of the gaps S1 and S2 is not particularly limited.
- the gaps S1 and S2 are formed in an annular shape, or a plurality of the raised portions 63b and the protruding portions 63c are provided in an annular shape at equal intervals, so that the passages can be provided in the radial direction and the contents can flow stably. it can.
- the nozzle member 61 also opens the elastic valve body 64 in two stages with respect to the contents from the container.
- the check valve structure 15 includes an inner flange 43a and an inner cylinder portion 63a (valve seat) of the valve seat body 63 on the upstream side, and a downstream support portion 35 (support portion) of the upper bottom portion 22 of the nozzle plug 62 on the downstream side. ) And an elastic valve body 64 fixed between them.
- the inner surface of the outer edge portion of the elastic valve body 64 is in elastic contact with the outer surface of the inner cylindrical portion 63a, and the passage between the inner flange 43a and the downstream support portion 35 is elastic. It is closed by the valve body 64 (closed state).
- the inner portion 64b is first elastically deformed toward the downstream side while maintaining the closed state (first deformation).
- the inner portion 64b of the elastic valve body 64 is greatly elastically deformed, and accordingly, the outer edge portion 64a is inclined, or a part of the outer edge portion is expanded in the radial direction ( Second variation) (see FIG. 6c).
- the engagement force (fitting force) between the inner surface of the outer edge portion 64a of the elastic valve body 64 and the inner cylinder portion 63a of the valve seat body 63 is weakened, and the seal by the elastic valve body 64 is released.
- the contents include a gap S1 at the upper part of the inner cylinder part 63a, a gap S2 between the inner surface of the outer edge part 64a of the elastic valve body 64 and the inner cylinder part 63a of the valve seat body 63, a passage (dent) To the nozzle 23 via the part 38) (see arrow in FIG. 6c).
- this nozzle member 61 can also prevent the intake of substances from the outside air by the action of the check valve structure after use, and the opening of the nozzle 23 by returning to the original shape of the inner portion 64b. The liquid residue in the vicinity can be prevented.
- the inner portion 64b of the elastic valve body 64 may be bent so as to protrude upstream, like the inner portion 18b of the elastic valve body 18 of FIG. it can. As a result, the amount of liquid drawn back can be increased.
- 7a includes a container 11A that is substantially the same as the squeeze container 10 of FIG. 1 and a nozzle member 71 that is attached to the opening thereof.
- the nozzle member 71 includes a cylindrical nozzle plug 72 that is fixed to the opening of the container 11A, a cylindrical valve seat body 73 that is inserted therein, and a valve seat body 73 that is accommodated in the nozzle plug 72. It consists of the elastic valve body 74 supported between the valve seat bodies 73.
- the nozzle plug 72 has an enlarged diameter below the nozzle base 21 so as to be fitted over the opening of the container 11 ⁇ / b> A. Therefore, it looks like a staircase when viewed from the side.
- An engagement groove 72b is provided on the inner peripheral surface of the lower step portion 72a, and by engaging the engagement groove 72b with the engagement piece 11b provided on the outer peripheral surface of the opening of the container 11A, A nozzle plug 72 is fixed to the opening of the container 11A.
- a plurality of vertical ribs 72c are provided at equal intervals on the inner peripheral surface of the lower step portion 72a and above the engagement groove 72b.
- the vertical rib 72c meshes with a tip projection 73h of an outer flange 73f of the valve seat body 73, which will be described later, and suppresses relative rotation between the nozzle plug 72 and the valve seat body 73.
- adhesion or welding may be employed in addition to the meshing.
- a convex portion 72e is provided on the inner surface of the upper step portion 72d.
- the convex portion 72e is for fitting with a concave portion 73e of a valve seat body 73, which will be described later, to connect the nozzle plug 72 and the valve seat body 73.
- the lower surface of the upper bottom portion 22 is provided with protruding portions 72f provided at equal intervals so as to surround the center hole 22c.
- the nozzle plug 72 is not provided with the bulging portion 37 as shown in FIGS. 4B and 5B, and the periphery of the projecting portion 72f is a recessed portion (communication path) 72g.
- the imaginary line in FIG. 7b shows an annular downstream support portion 35 that supports the elastic valve element 74 and contacts the downstream end face 18a1.
- the recess 72g of the nozzle plug 72 has at least one extending radially outward from the center hole 22c in order to prevent the elastic valve body 74 from significantly blocking the contents toward the center hole 22c (nozzle 23).
- a narrow groove 72h is formed. Specifically, three narrow grooves 72h are provided radially outward (radially) from the center hole 22c between the protrusions 72f and 72f.
- the narrow groove 72 h has an end portion in the radially outward direction that extends to the outside of the outer edge portion 18 a of the elastic valve body 74. And it comprises a part of communicating path.
- the depth increases as it approaches the center hole 22c. However, the depth may be constant.
- the valve seat body 73 is provided with an inner flange 73a on the inner peripheral surface thereof.
- the upper surface of the inner flange 73a serves as an upstream support portion that comes into contact with the upstream end surface 18a2 of the elastic valve element 74.
- a protrusion 73b extending toward the inner periphery is provided at the inner peripheral end of the inner flange 73a so as to increase the area of the upstream support portion.
- the protrusion 73b may not be provided.
- At least one vertical groove 73d is provided on the inner peripheral surface of the upper cylindrical portion 73c above the inner flange 73a.
- the vertical groove 73d prevents the entire outer peripheral surface of the outer edge portion 18a of the elastic valve body 74 from coming into contact with the inner peripheral surface of the upper cylindrical portion 73c, and the contents toward the center hole 22c are blocked by the elastic valve body 74. This is to prevent passage of the contents, that is, to secure a passage for the contents.
- a plurality of vertical grooves 73d are preferably provided at equal intervals.
- a concave portion 73e is provided on the outer peripheral surface of the upper cylindrical portion 73c, and is engaged with a convex portion 72e provided on the inner peripheral surface of the upper step portion 72d of the nozzle plug 72.
- An outer flange 73f is provided below the upper cylindrical portion 73c so as to project outward in the radial direction.
- a tip protrusion 73h is provided on the outer peripheral end of the outer flange 73f, and meshes with the vertical rib 72c of the nozzle plug 72 as described above. Further, the lower surface of the outer flange 73f is in contact with the front end surface (upper end surface) of the opening of the container 11A. Therefore, the valve seat body 73 does not move to the upstream side (inside the container 11 ⁇ / b> A), and the elastic valve body 74 can be supported (held) with a stable force with the downstream support portion 35 of the nozzle plug 72. .
- valve seat body 73 The downstream movement of the valve seat body 73 is restricted by a horizontal portion (expansion stepped portion) 72i between the lower step portion 72a and the upper step portion 72d of the nozzle plug 72 and the upper bottom portion 22.
- the outer peripheral surface of the lower cylindrical portion 73g below the outer flange 73f is in intimate contact with the inner peripheral surface of the opening of the container 11A to prevent leakage of contents from this portion.
- the height (thickness) of the outer edge portion 18a is high (thick) in the same manner as the elastic valve body 44 in FIGS. 5a and 5c in order to improve the sealing performance in an unloaded state.
- the thin inner portion 18b provided so as to stretch a film on the upper portion of the cylindrical outer edge portion 18a is projected to the upstream side in an unloaded state, like the inner portion 18b shown in FIGS. It is curved.
- the nozzle member 71 also has an annular end surface 18 a 2 on the upstream side of the outer edge portion 18 a of the elastic valve body 74 and an upstream support portion (upper surface of the inner flange 73 a) of the valve seat body 73. Is provided with a check valve structure 15 that closes the communication path.
- the elastic valve element 74 undergoes two-stage deformation (the first deformation in which only the inner portion 18b is deformed toward the downstream side and the second deformation in which the outer edge portion 18a is deformed) with respect to the contents from the container 11A. Go and open. Therefore, the valve does not open unnecessarily. Further, after use, the liquid remaining in the vicinity of the opening of the nozzle 23 can be prevented by returning the original shape of the inner portion 18b.
- Other configurations are substantially the same as the squeeze container 40 of FIG.
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Abstract
Description
特許文献1、2、3には、弁座と、支持体と、その間に支持される平板状の弁体とからなる逆止弁構造が開示されている。いずれの弁体も、上流(容器内)から下流(容器外)への方向に弁体の中心が突出するように支持されている。そのため、上流から下流への圧力を受けると、弁体の中心がより突出するように変形し、流体は弁体を周るように流れる。一方、下流から上流への圧力を受けると、弁体は平坦に戻るように変形して通路を閉じる。
特許文献4、5には、中央に切欠きが形成された弁体を備えた逆止弁構造が開示されている。そのため、上流から下流への圧力を受けると、弁体の中心の切欠きが開き、逆の圧力を受けると弁体の中心の切欠きが閉じる。なお、特許文献5には、弁体の原形復帰により、ノズルの液残りを引き戻す効果の記述がある。
本発明は、流体の逆流を防止するだけではなく、正しい方向の意図しない圧力に対しては流体が吐出されない逆止弁構造およびそれを用いたスクイズ容器を提供することを目的としている。
このように弾性弁体が弁座と支持部との間で挟持されているものであって、前記下流支持部に前記連通路を構成する凹み部が形成されているものが好ましい。しかし、前記弾性弁体の下流側の端面に前記連通路を構成する切欠きが形成されていてもよい。この場合、凹み部または切欠き等の連通路が複数個環状に等間隔で設けるのが良い。
弾性弁体が弁座と支持部との間で挟持されているものであって、弁座の上流支持部が弁座の上端開口部であるものが好ましい。
弾性弁体が弁座と支持部との間で挟持されているものであって、外縁部の少なくとも一部が内側部より肉厚となっているものが好ましい。
弾性弁体が弁座と支持部との間で挟持されているものであって、前記弾性弁体の外縁部の少なくとも一部が内側部より肉厚となっており、前記上流支持部が前記弁座の内面に形成された環状の内側フランジであるものが好ましい。
弾性弁体が弁座と支持部との間で挟持されているものであって、外縁部の外周端が挟持されているものが好ましい。
このように弾性弁体が弁座との係合によって固定されており、外縁部に内筒部が挿入されているものであって、前記弾性弁体の内側部の上流側の面と前記弁座の内筒部(の下流側の端部)との間に隙間を有し、かつ、前記弾性弁体の外縁部の上流側の端面と前記弁座のフランジ部の上面(下流側の面)との間に隙間を有するものが好ましい。
このようなノズル部材であって、筒状のノズル栓と、そのノズル栓に挿入される筒状の弁座体と、それらの間で固定される前記弾性弁体とからなり、前記ノズル栓が、前記支持部と、前記ノズルとを備え、前記弁座体が、前記弁座を備えているものが好ましい。
このようなノズル部材であって、ノズルが液滴ノズルであるものが好ましい。
本発明のスクイズ容器の第2の態様は、可撓性を有し、ノズルを備えた容器と、本発明のいずれか記載の逆止弁構造とを備えたことを特徴としている。
本発明の第2の態様のスクイズ容器であって、前記ノズルが液滴ノズルであるものが好ましい。
弾性弁体が弁座と支持部との間で挟持されているものであって、上流支持部が前記弁座の上端開口部である場合、弾性弁体の挟持構造を簡素化できる。
弾性弁体が弁座と支持部との間で挟持されているものであって、外縁部の少なくとも一部が内側部より肉厚となっている場合、外縁部を弾性変形させるために必要な圧力と、内側部が弾性変形する圧力とに大きな差を設けることができる。それにより内側部の原形復帰による流体の呼び戻し量を大きくすることができる。また、スクイズ容器等を圧縮させるときの遊びが大きくなる。
弾性弁体が弁座と支持部との間で挟持されているものであって、外縁部の外周端が挟持されている場合、組み立て工程において弾性弁体の位置を正確に合わせることができる。また弾性弁体の外周端が変形することにより、弾性弁体の位置がずれたり、逆止弁の性能を低下させるといった不具合を防止できる。
このように弾性弁体が支持部との係合によって固定され、外縁部に内筒部が挿入されるものであって、前記弾性弁体の内側部の上流側の面と前記弁座の内筒部(の下流側の端部)との間に隙間を有し、かつ、前記弾性弁体の外縁部の上流側の端面と前記弁座のフランジ部の上面(下流側の面)との間に隙間を有する場合、流体をそれぞれの隙間を通すことにより、スムースに流すことができる。
このようなノズル部材であって、筒状のノズル栓と、そのノズル栓に挿入される筒状の弁座体と、それらの間で固定される前記弾性弁体とからなり、前記ノズル栓が前記支持部および前記ノズルを備え、前記弁座体が前記弁座を備えている場合、組み立て易い。特にノズルが液滴ノズルの場合に好ましい。
本発明のスクイズ容器であって、前記ノズルが液滴ノズルである場合、液滴ノズルへの供給量が安定しているため、操作が簡単である。
この容器11は可撓性を有する材料、特に弾性変形するように弾性を有する材料から成形されるのが好ましい。また例えば、図1に示すものの他に、内側の容器が内容物の吐出により潰れる二重構造のものであってもよい。
ノズル基部21は、弁座体17および弾性弁体18を収容する筒体である。ノズル基部21の筒状の下端21aは、容器11のノズル連結部11aと連結する被ノズル連結部となっている。このノズル連結部11aと被ノズル連結部の連結構造は特に限定されない。そして、被ノズル連結部の位置も、ノズル基部21に設けられていればよい。さらに下端21aは、弁座体17と連結する弁座連結部を兼ねている。しかし、弁座連結部の位置もノズル基部に設けられていればよい。
上底部22は、ノズル23に連通する中心孔22cを有する円板状のものである。その下面には、図2cに示すように、弾性弁体18を下流側から支持する環状の下流支持部24が設けられている。下流支持部24は、上流側に突出した突出部24aと、その突出部24aより下流側に凹んだ凹み部24bとが交互になるように形成されている。この凹み部24bが下流支持部24の内外を連通する連通路を構成する。この実施形態では3つの突出部24aが周方向に等間隔で設けられている。図2cの想像線は、後述する弾性弁体18の外縁部18aを示す。なお、この下流支持部24が内外に連通する連通路を有していれば、突出部24aと凹み部24bの構成あるいは突出部24aおよび/または凹み部24bの数は特に限定されるものではない。しかし、凹み部24bを複数環状に等間隔で設けることにより、弾性弁体18に歪みが生じることを防止し、使用することによってシール性が低下しにくい。また、後述するようにノズル栓16と弁座体17とを連通する連通路を形成するため、内容物を均一に流すことができる。
ノズル23は、内容物の吐出口となる筒体である。この実施形態では、液滴ノズルとしている。
外縁部18aは、ノズル栓16の上底部22の下流支持部24と、弁座体17の支持突起(上流支持部)17aとの間に挟持される。つまり、図2aに示すように、無負荷状態において、外縁部18aの下流側の端面18a1はノズル栓16の下流支持部24(実質的には突出部24a)と部分的に当接し、外縁部18aの上流側の端面18a2は弁座体17の支持突起17aの全周と当接する。外縁部18aは、円環状を呈しているが、環状であればその形状は特に限定されない。
内側部18bは上流側に突出するように湾曲した弾性板である。弾性弁体18は、外縁部18aと内側部18bの間の段部18cが下流側に向くように配置される。内側部18bは円板状を呈しているが、外縁部に応じて形状は適宜選択される。
なお、外縁部18aは、無負荷状態においてノズル栓16と弁座体17との間を確実にシールできれば、外縁部18aの少なくとも一部が内側部18bより肉厚であってもよい。例えば、外縁部18aは均一な厚みでなくてもよく、また、外縁部の少なくとも一部の領域で内側部分より厚い部分を備えていれば内側部18bより薄い部分を備えていてもよい。特に、上流支持部と下流支持部との間で挟持される領域の少なくとも一部が肉厚となっているものが好ましい。さらに、肉厚の領域が環状に形成されているものが好ましい。
逆止弁構造15は、上流側にある弁座体17の支持突起17a(弁座)と、下流側にあるノズル栓16の上底部22の下流支持部24(支持部)と、それらの間に挟圧固定された弾性弁体18とからなる。そして、無負荷状態においては、弾性弁体18の外縁部の上流側の端面18a2が弁座(支持突起17a)に対して環状に弾性的に当接しており、支持突起17aと下流支持部24との間の通路は弾性弁体18によって閉じられている(閉止状態)。
逆止弁構造15の弾性弁体18が、弾性弁体18より下流側(図1の弾性弁体18より上側)から圧力を受けたとき、弾性弁体18の内側部18bがその圧力を受ける。しかし、その圧力は、シールを形成する外縁部18aの上流側の端面と弁座体17の支持突起17aの当接には影響がない。そのため、上述の閉止状態が維持される。
なお、この実施形態では、弾性弁体18の外縁部18aの肉厚を内側部18bの肉厚より厚くしているが、実質的に同じとしてもよい。この場合も外縁部18aは、ノズル栓16と弁座体17との間で挟持されて拘束されているため、内側部18bより変形を起こしにくい。結果、上述のような2段階の変形を起こす。しかし、外縁部18aと内側部18bに弾性度の差を設けた方が、弾性弁体18の装着具合に関わらず高い効果を得られることができるため、生産性が高くて好ましい。
この実施形態では、内側部18bの第1変形は、容器からの圧力F1が解除されたとき、元の形状に戻る弾性変形である。しかし、圧力F1が解除されたとき復帰しない変形でもよい。その場合、弾性の容器11を用いる。つまり、圧縮変形させた容器11が弾性復帰することによって容器11内が減圧状態になるので、その吸引力によって、下流側に変形した内側部18bを元の形状に復帰させる。これにより同様の液残りを防止できる。
そして、使用後、外縁部18aと支持突起17aのシール作用が戻るため、外気からの物質の吸い込みが生じない。さらに、使用後、内側部18bが弾性変形している場合、その弾性力によって内側部18bが上流側に突出する。あるいは内側部18bが非弾性変形している場合、容器11の圧縮された胴部の弾性力によって下流側に突出した内側部18bが上流側に突出する。このような内側部18bの原形復帰により、ノズル23の液体が内部に引き寄せられるため、ノズル23の開口部近辺の液残りを防止できる。特に、内側部18bを上流側に湾曲させているため、多くの液体を引き寄せることができ、液残りを一層防止できる。なお、内側部18bを湾曲させず平坦にしても、原形復帰によるノズル23の開口部近辺の液残りを引き寄せることができる。
上底部22の下面には、図4bに示すように、環状に配置される複数の突出部36と、その突出部36を囲むように、突出部36より低く設けられた複数の膨出部37と、隣接する膨出部37の間に設けられ、外縁から中心に延びる凹み部38とが設けられている。
膨出部37は、突出部36を囲む扇形の突起である。
そして、図4bの想像線は、弾性弁体18を支持し、下流側の端面18a1と当接する環状の下流支持部35となる。この下流支持部35は外側凸部36a、膨出部37、凹み部38を含み、弾性弁体34に対して凹凸を有している。
下流支持部35は、上底部22の下面の外縁から中心孔22cまでの連通路を確保できれば、その形状は特に限定されない。しかし、外縁から中心孔22cに向かって延びる連通路(凹み部38)を複数等間隔で並べることにより、弾性弁体34の歪みが防止されてシール性が低下しにくく、内容物をスムースに流すことができて好ましい。
突出部36(外側凸部36a)は外縁まで延びているため、弾性弁体34の外周端をしっかり支持することができる。そのため、組み立て時に弾性弁体34がずれにくく、組み立て工程が容易となる。さらに弾性弁体34の外周端が変形することによって弾性弁体34がずれたり、逆止弁の性能を低下させるといった不具合を防止できる。
そして、膨出部37や内側凸部36bを設けることによりノズル栓32内の内部空間(弾性弁体34より下流側の空間)を小さくすることができ、つまり、液溜空間を小さくすることができる。
弾性弁体34は、内側部18bが平坦な薄肉板である点、外縁部18aと内側部18bの間の段部18cが上流側に向くように配置される点以外は、図1の弾性弁体18と実質的に同じものである。このように平板とすることにより、弾性弁体34の原形復帰による液の引き戻し量は減少するが、液溜空間を小さくすることができる。また容器11が弾性を有する場合、内容物を吐出した後、容器は僅かではあるが弾性復元する一方、外気からの物質の吸い込みは逆止弁構造によって阻止されるので容器11内は減圧状態になる。そのため、平板状の内側部18bが上流側に変位する力を受ける。この変位力により内側部18bが、無負荷状態において、図1の弾性弁体18のように上流側に湾曲変位するようにしてもよい。この場合液の引き戻し量を増加させることができる。また、内容物を充填する際、容器内を減圧状態にして充填してもよい。この場合も弾性弁体34の内側部18bを、図2の弾性弁体18の内側部18bのごとく、上流側に突出するように湾曲させることができる。それにより液の引き戻し量を増加させることができる。
そのため、容器からの内容物に対しては、閉止状態が維持されながら最初に内側部18bが下流側に向かって弾性変形する(第1変形)。容器からの内容物の圧力が強くなると、外縁部18aがノズル栓32の下流支持部35の凹凸に応じて弾性変形(第2変形)して、上端面33a(上流支持部)と弾性弁体34とのシールが解除される。弁座体33は、上流支持部を突起ではなく、当接面(上端面33a)としている。図1のノズル部材12と同様に、不必要に弁が開かれることがなく、特にスクイズ容器に好ましく用いられる。また、使用後、内側部18bの原形復帰によるノズル23の開口部近辺の液残りも防止できる。
なお、ノズル基部21の下端21aの被ノズル連結部は、図1の被ノズル連結部と形状を異にしているが、容器11とノズル部材12とを連結するもので特に限定されるものではない。
上部内面に弾性弁体44を支持する内側フランジ43aが形成されているため、弾性弁体44はノズル栓42と弁座体43の連結状態に関係なく安定して配置することができる。つまり、組み立て前(連結前)において弁座体43の上部で弾性弁体44を平面方向に支持できる。そのため、組み立て(連結)工程が容易である。また、弾性弁体44の外縁部18aの外端部を正確に挟持できる。
つまり、容器からの内容物に対しては、閉止状態が維持されながら初めに内側部18bが下流側に向かって弾性変形する(第1変形)。容器からの内容物の圧力が強くなると、外縁部18aの下流側の端面18a1がノズル栓42の外周縁の凹凸に応じて波打つように弾性変形する、あるいは、外縁部18aの下端部位が圧縮変形(例えば、図5cの想像線に示すように上流側の端面18a2が上昇する)(第2変形)する。いずれの弾性変形を採用するかは、外縁部の厚み等に応じて適宜選択できる。この外縁部18aの第2変形により弾性弁体44によるシールが解除される。そのため、図1のノズル部材12と同様に、不必要に弁が開かれることがなく、特にスクイズ容器に好ましく用いられる。また、同様に、使用後、逆止弁構造の作用により外気からの物質の吸い込みを防止でき、かつ、内側部18bの原形復帰によるノズル23の開口部近辺の液残りを防止できる。
また、図5a、図5cのいずれの場合も弾性弁体44の内側部18bを、図2の弾性弁体18の内側部18bのごとく、上流側に突出するように湾曲させてもよい。それにより液の引き戻し量を増加することができる。
ノズル栓52は、図5d、図5eに示すように、上底部22の下面全体が環状の外溝52aを残して外縁部近辺から半径方向内側に向かう外側凸部36aと、半径方向内側に向かって緩やかに高さが減少する内側凸部36bとからなる突出部36となっている点以外は、図1のノズル栓16と実質的に同じである。つまり、下流支持部35は、外側凸部36aと内側凸部36bを含んでいる。
弁座体53は、図5aのスクイズ容器40の弁座体43と実質的に同じものである。
弾性弁体54には、外縁部18aと内側部18bの上面に外縁から半径方向内側に延びる切欠き54aが形成されている。この切欠き54aは、ノズル栓52の上底部22の下面との間において、外縁と中心孔22cとの間を繋ぐ連通路となる。他の構成は、図5aのスクイズ容器40の弾性弁体44と実質的に同じものである。
ノズル栓62は、図5aのスクイズ容器40のノズル栓42と実質的に同じものであり、上底部22の下面に外縁と中心孔とを連通する通路(凹み部38)が形成されたものである(図6b参照)。
弁座体63は、内側フランジ43aの内端から下流方向に向かって延びる内筒部63aが形成されている点以外は、図5aのスクイズ容器40の弁座体43と実質的に同じものである。内筒部63aの外面は、上流方向に向かって広がるように若干斜面としてもよい。
弾性弁体64は、筒状の外縁部64aと、その外縁部の上端を閉じる肉薄の内側部64bとからなる。外縁部64aの高さは、弁座体63がノズル栓62に取り付けられたときの内側フランジ43aと下流支持部35の間の距離より小さくなっている。つまり、ノズル部材61を組み立てた状態で弾性弁体64は外縁部64aと内筒部63aとの嵌合によって係止されている。そして、弁座体63の内筒部63aの上端(下流側の端部)と弾性弁体64の内側部64bの下面(上流側の面)との間に環状の隙間S1があり、また弁座体63の内側フランジ43aの上面(下流側の面)と弾性弁体64の外縁部の上流側の端面18a2との間に環状の隙間S2がある。しかし、隙間S1、S2は、環状でなくてもよく、一定の間隔(高さ)でなくてもよい。例えば、図6dに示すように、内側フランジ43aの上面の一部に隆起部63bを設け、一部の隙間S2を小さくしてもよい。このように隙間S2を小さくすることにより、弾性弁体64より下流側の空間、すなわち液溜空間を小さくすることができる。また、図6eに示すように、内筒部63aの上端から突部63cを延設し、弾性弁体64の内側部64bの一部と当接させてもよい。つまり、隙間S1は平面視で扇状となる。これにより弾性弁体64を突部63cに支持させることができる。このように隙間S1、S2の形状は特に限定されない。しかし、隙間S1、S2を環状にしたり、前記隆起部63bおよび突部63cを複数を等間隔で環状に設けることにより通路を半径方向均等に設けることができ、内容物を安定して流すことができる。
つまり、容器からの内容物に対しては、閉止状態を維持しながら初めに内側部64bが下流側に向かって弾性変形する(第1変形)。次いで、容器からの内容物の圧力が強くなると、弾性弁体64の内側部64bが大きく弾性変形し、それに伴い外縁部64aが傾く、あるいは、外縁部の一部が半径方向に押し拡げられる(第2変形)(図6c参照)。これにより、弾性弁体64の外縁部64aの内面と弁座体63の内筒部63aの係合力(嵌合力)が弱まり、弾性弁体64によるシールが解除される。そして、内容物は、内筒部63aの上部の隙間S1、弾性弁体64の外縁部64aの内面と弁座体63の内筒部63aの間、外縁部の下方の隙間S2、通路(凹み部38)を介してノズル23に供給される(図6cの矢印参照)。なお、このノズル部材61も、他のノズル部材と同様に、使用後、逆止弁構造の作用により外気からの物質の吸い込みを防止でき、かつ、内側部64bの原形復帰によりノズル23の開口部近辺の液残りを防止できる。
また、図6a、図6d、図6eのいずれの場合も弾性弁体64の内側部64bを、図2の弾性弁体18の内側部18bのごとく、上流側に突出するように湾曲させることができる。それにより液の引き戻し量を増加することができる。
また、下段部72aの内周面であって係合溝72bの上方には、縦リブ72cが等間隔に複数設けられている。この縦リブ72cは、後述する弁座体73の外側フランジ73fの先端突起73hと噛み合い、ノズル栓72と弁座体73との相対回転を抑制するためのものである。なお、相対回転を抑制する方法として、噛み合いの他に接着や溶着などを採用しても良い。
内側フランジ73aの内周端には、図7aに示すように、上流支持部の面積を拡げるようにして内周側に向かって延びる突起部73bが設けられている。ただ、突起部73bは設けなくても良い。
外側フランジ73fより下の下側筒部73gの外周面は、容器11Aの開口部の内周面と密接しており、この部分からの内容物の漏れを防いでいる。
11、11A 容器
11a ノズル連結部
11b 係合片
12 ノズル部材
15 逆止弁構造
16 ノズル栓
17 弁座体
17a 支持突起(上流支持部)
17b 被弁座連結部
18 弾性弁体
18a 外縁部
18a1 下流側の端面
18a2 上流側の端面
18b 内側部
18c 段部
21 ノズル基部
21a ノズル基部の下端
22 上底部
22c 中心孔
23 ノズル
24 下流支持部
24a 突出部
24b 凹み部
30 スクイズ容器
31 ノズル部材
32 ノズル栓
33 弁座体
33a 上端面(上流支持部)
34 弾性弁体
35 下流支持部
36 突出部
36a 外側凸部
36b 内側凸部
37 膨出部
38 凹み部
40 スクイズ容器
40a スクイズ容器
41 ノズル部材
42 ノズル栓
42a 外溝
42b ノズル先端の内面
43 弁座体
43a 内側フランジ
44 弾性弁体
50 スクイズ容器
51 ノズル部材
52 ノズル栓
52a 外溝
53 弁座体
54 弾性弁体
54a 切欠き
60 スクイズ容器
61 ノズル部材
62 ノズル栓
63 弁座体
63a 内筒部
63b 隆起部
63c 突部
64 弾性弁体
64a 外縁部
64b 内側部
70 スクイズ容器
71 ノズル部材
72 ノズル栓
72a 下段部
72b 係合溝
72c 縦リブ
72d 上段部
72e 凸部
72f 突出部
72g 凹み部
72h 細溝
72i 拡径段部
73 弁座体
73a 内側フランジ
73b 突起部
73c 上側筒部
73d 縦溝
73e 凹部
73f 外側フランジ
73g 下側筒部
73h 先端突起
74 弾性弁体
Claims (19)
- 上流側にある環状の弁座と、下流側にある環状の支持部と、それらの間で固定される弾性弁体とからなり、
前記弾性弁体が、環状の外縁部と、その外縁部によって囲まれる内側部とを有し、
前記弁座と支持部との間の通路が、前記弁座と弾性弁体の外縁部とが環状に弾性的に当接することによって閉じられており、
下流からの流体の圧力に対して前記通路の閉止状態が維持され、
上流からの流体の圧力に対して前記弾性弁体の内側部が下流側に向かって変形し、
上流からの流体のさらなる圧力に対して前記弾性弁体の外縁部が弾性変形し、前記弁座と弾性弁体の外縁部との間の当接が一部解除されて前記通路が開放される、
逆止弁構造。 - 前記弾性弁体の外縁部が、前記外縁部の上流側の端面を当接して支持する前記弁座の環状の上流支持部と、前記外縁部の下流側の端面を当接して支持する前記支持部の環状の下流支持部との間の挟持によって固定されており、
前記通路が、前記弁座の上流支持部と前記弾性弁体の外縁部の上流側の端面との環状な当接によって閉じられており、
前記環状の外縁部の下流側の端面または前記支持部の環状の下流支持部には、それらの内外を連通する連通路が設けられている、
請求項1記載の逆止弁構造。 - 前記下流支持部に前記連通路を構成する凹み部が形成されている、
請求項2記載の逆止弁構造。 - 前記弾性弁体の下流側の端面に前記連通路を構成する切欠きが形成されている、
請求項2記載の逆止弁構造。 - 前記連通路が複数個環状に等間隔で設けられている、
請求項2~4いずれか記載の逆止弁構造。 - 前記上流支持部が前記弁座の上端開口部である、
請求項2~5いずれか記載の逆止弁構造。 - 前記外縁部の少なくとも一部が内側部より肉厚となっている、
請求項2~6いずれか記載の逆止弁構造。 - 前記弾性弁体の外縁部の少なくとも一部が内側部より肉厚となっており、
前記上流支持部が前記弁座の内面に形成された環状の内側フランジである、
請求項2~5いずれか記載の逆止弁構造。 - 前記外縁部の外周端が挟持されている、
請求項2~8いずれか記載の逆止弁構造。 - 前記弾性弁体の外縁部が筒体であり、
前記弁座の上流支持部が、弁座の内面から延びるフランジ部と、そのフランジ部から下流に向かって延びる内筒部とを有し、
前記内筒部および外縁部の一方が他方に挿入され、他方の内面と一方の外面とが係合することにより前記弾性弁体が固定され、他方の内面と一方の外面とが環状に当接することにより前記通路が閉じられている、
請求項1記載の逆止弁構造。 - 前記外縁部に内筒部が挿入され、
前記弾性弁体の内側部の上流側の面と前記弁座の内筒部との間に隙間を有し、かつ、
前記弾性弁体の外縁部の上流側の端面と前記弁座のフランジ部の下流側の面との間に隙間を有する、
請求項10記載の逆止弁構造。 - 前記内側部の少なくとも一部が薄肉となっている、
請求項1~11いずれか記載の逆止弁構造。 - 前記内側部が上流側に突出するように湾曲している、
請求項12記載の逆止弁構造。 - 可撓性の容器の開口部に取り付けられるノズル部材であって、
請求項1~13いずれか記載の逆止弁構造と、その支持部の下流に設けられたノズルとを備えた、ノズル部材。 - 筒状のノズル栓と、
そのノズル栓に挿入される筒状の弁座体と、
それらの間で固定される前記弾性弁体とからなり、
前記ノズル栓が、前記支持部と、前記ノズルとを備え、
前記弁座体が、前記弁座を備えている、
請求項14記載のノズル部材。 - 前記ノズルが液滴ノズルである、請求項14または15記載のノズル部材。
- 可撓性を有する容器と、請求項14~16いずれか記載のノズル部材とを備えたスクイズ容器。
- 可撓性を有し、ノズルを備えた容器と、その容器に設けられる請求項1~13いずれか記載の逆止弁構造とを備えたスクイズ容器。
- 前記ノズルが液滴ノズルである、請求項18記載のスクイズ容器。
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JP2017551855A JP6944376B2 (ja) | 2015-11-20 | 2016-11-11 | 逆止弁構造、それを用いたノズル部材およびスクイズ容器 |
CA3003384A CA3003384A1 (en) | 2015-11-20 | 2016-11-11 | Check valve structure, nozzle member using same, and squeeze container |
US15/777,453 US10654629B2 (en) | 2015-11-20 | 2016-11-11 | Check valve structure, nozzle member using same, and squeeze container |
CN201680067745.7A CN108474489B (zh) | 2015-11-20 | 2016-11-11 | 止回阀结构、使用了其的喷嘴部件以及挤出式容器 |
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