JP2013233993A - Dispensing container with filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent a contained liquid from permeating to a filter of a dispensing container with the filter using a delamination bottle before the container is used for the first time, and to reduce dispensing resistance when the container is used for a second time and thereafter.SOLUTION: A fitting section 31c is formed in a dispensing path of a plug 3. A plug body 34 is fitted into the fitting section 31c so as to be separated from the fitting section 31c due to an increase of the internal pressure of an inner-layer bag 22 by a squeezing the deformation of a body of an outer-layer bottle 21. The dispensing path is closed by the plug body 34 fitted into the fitting section 31c. After the plug body 34 is separated from the fitting section 31c, a space between the inner-layer bag 22 and a filter 33 is in a state that liquid can pass therethrough.

Description

  The present invention relates to a discharge container with a filter.

  Conventionally, the applicants of the present application have disclosed a discharge container with a filter using a delami bottle (laminated peeling bottle) that can be suitably used for a sterile eye drop container or the like, for example, in Patent Documents 1 and 2 below.

Japanese Patent Laid-Open No. 2002-80055 JP 2009-179403 A

  In these conventional discharge containers with a filter, an outer layer bottle provided with a mouth at the upper end of a squeeze-deformable body, and an opening provided inside the outer layer bottle and connected to the mouth of the outer layer bottle An inner layer bag having a cap attached to the mouth of the outer layer bottle, the outer layer bottle has an introduction hole for introducing outside air between the outer layer bottle and the inner layer bag, The spout is provided with a discharge passage for discharging the content liquid contained in the inner layer bag, and a filter and a check valve are provided in the discharge passage.

  As this filter, a membrane filter or the like having a large number of fine holes that do not allow the passage of viruses and bacteria is used. In the above-mentioned Patent Document 1, the check valve is a valve body elastically supported by a thin piece. In the above-mentioned Patent Document 2, the main structure is formed by inserting a cross-shaped orifice into a valve head of a valve body formed of an elastic material.

  A filter having a large number of micropores as described above becomes so-called air-locked when the micropores are closed by moisture when wet, and air can pass through without applying high pressure that exceeds the bubble point of the filter. Therefore, it is required to keep the filter in a dry state when storing the container before the first use.

  However, the conventional check valve mechanism described above may ooze out of the check valve, especially in highly permeable liquids, and the liquid that has oozed out will wet the filter, causing an air lock. There is a problem that the discharge of the content liquid is hindered by the air remaining on the side. That is, in the check valve described in Patent Document 1, since the valve hole is sealed by bringing the disc-shaped valve body into contact with the valve hole, the adhesion between the valve body and the valve hole is In the case of a relatively weak and highly permeable liquid, it may ooze out between the valve element and the valve hole. Further, in the check valve described in Patent Document 2, the orifice is formed by cutting, and an external force that strongly adheres the orifice does not act, so that in the case of a highly permeable liquid, the orifice may ooze out from the orifice. .

  Furthermore, in the case of a check valve mechanism, a valve body is installed to draw the liquid agent downstream of the filter, but the orifice is opened by raising the valve head when the liquid contents are dropped after the second use. It is necessary to squeeze and deform the outer layer bottle relatively strongly in order to cause the content liquid to drip due to this lifting resistance, and a comfortable feeling of use cannot be obtained.

  Therefore, the present invention reliably prevents the content liquid from oozing out to the filter before the first use in a discharge container with a filter using a delami bottle and reduces the discharge resistance during the second and subsequent use. With the goal.

  In order to achieve the above object, the present invention takes the following technical means.

  That is, the present invention relates to an outer layer bottle having a mouth portion provided at the upper end of a squeeze-deformable body portion, and an inner layer bag having an opening portion provided in the outer layer bottle and connected to the mouth portion of the outer layer bottle. And a stopper attached to the mouth portion of the outer layer bottle, the outer layer bottle has an introduction hole for introducing outside air between the outer layer bottle and the inner layer bag, and the stopper Is provided with a discharge passage for discharging the content liquid contained in the inner layer bag, and in the container with a filter in which a filter is provided in the discharge passage, the discharge passage of the plug is located upstream of the filter. A stopper that is fitted to the fitting portion so as to be detached from the fitting portion when an inner pressure of the inner layer bag is increased due to squeeze deformation of the barrel portion of the outer layer bottle. And fits in the mating part Is to the discharge passage by a plug body which is closed, after the stopper is disengaged from the fitting portion is characterized in that the liquid permeation state between the inside and the filter of the inner layer bag. In the present invention, the term “discharge” includes a drop that is discharged from the tip nozzle portion one by one, and includes one that continuously causes a predetermined amount of content liquid to flow out as a water flow.

  According to the discharge container with a filter of the present invention, when the stopper is fitted in the fitting portion, the space between the filter and the fitting portion is filled with air, It is possible to reliably close the discharge path with the fitted plug body and prevent the content liquid in the inner layer bag from seeping out from between the discharge path and the plug body. That is, in the above-described conventional check valve mechanism, the check valve needs to return to a state in which the discharge path is closed, so that there is a limit to the closing force of the closed orifice, and the orifice can be strongly closed. There wasn't. On the other hand, in the present invention, once the plug body is detached from the fitting portion, it is only necessary to support the plug body in such a detached state. It is possible to prevent the exudation of the content liquid with certainty even when a highly permeable liquid is filled as the content liquid. In this way, the stopper is detached from the fitting part by increasing the internal pressure of the inner layer bag by squeezing the body part of the outer layer bottle while closing the introduction hole while having the structure in which the stopper is fitted to the fitting part. Therefore, a special opening operation is not necessary at the time of the first discharge of the content liquid, and it is only necessary to slightly squeeze the outer layer bottle only at the first discharge. Furthermore, when the plug body is removed from the fitting part, the plug body instantaneously jumps out of the fitting part due to the internal pressure of the pressurized inner layer bag. Thus, even if the structure of the plug body cannot be visually confirmed from the outside, it is possible to allow the user to recognize that the discharge path is communicated by this vibration. In addition, at the time of the first discharge, the air between the filter and the fitting part is pushed out from the filter by the content liquid flowing out from the periphery of the plug part toward the filter when the plug body is detached from the fitting part. After that, the space between the filter and the fitting part is filled with the content liquid, so that the wet filter prevents the outside air from being drawn from the downstream side of the filter to the upstream side of the filter. At the time of discharge, the content liquid can be smoothly dropped with a relatively light squeeze force. The inner layer bag shrinks and deforms as the content liquid decreases, and thereafter, the air taken in between the outer layer bottle and the inner layer bag is compressed by squeezing and compressing the outer layer bottle while closing the introduction hole. A compressive force is applied to the inner layer bag via the. In addition, air may be generated in the content liquid when air between the filter and the plug body is pushed out when the plug body is detached from the fitting portion and the space is replaced with the content liquid. Since only the content liquid passes through and is discharged by the wet filter, only the content liquid that does not contain bubbles flows out to the downstream side of the filter. In this way, a constant amount of dripping can be performed stably.

  The discharge container with a filter according to the present invention may further include an elastic support portion that biases the plug body in a direction in which the plug body is detached from the fitting portion. According to such a configuration, it is possible to reduce the squeeze force of the outer layer bottle for detaching the plug body from the fitting portion at the first discharge while increasing the fitting force between the plug body and the fitting portion. The prevention of liquid oozing and the feeling of use can be further improved.

  Further, after the plug body is detached from the fitting portion, the plug body is supported at the removal position by the elastic support portion, or after the plug body is detached from the fitting portion, the plug body is removed. By further including a support portion that supports the plug body, the detached plug body is supported at the disengagement position by the elastic support section or the support section, and the plug body is prevented from being re-fitted to the fitting section. A small squeeze force at the time of discharge operation can be guaranteed.

  In addition, it is preferable that the said elastic support part is integrally molded by the said plug. According to this, the number of constituent members can be reduced, the structure can be simplified, and the ease of assembly can be improved.

  Moreover, it is preferable that the said inner-layer bag has the resilience for sucking back the content liquid which remains in a discharge path downstream from a filter after discharging a content liquid to the upstream of a filter. According to this, after the first discharge operation, the content liquid remaining in the discharge passage on the downstream side of the filter is restored so that the inner layer bag contracted due to the decrease of the content liquid is slightly expanded, so that the upstream side of the filter It is possible to prevent the contents liquid from being exposed to the outside air and to prevent the propagation of germs on the downstream side of the filter. Furthermore, since the air between the filter and the plug body is pushed out to the outside and replaced with the content liquid at the time of the first discharge, the volume reduction amount of the inner bag due to the squeeze deformation of the container body at the time of the first discharge becomes large. In addition, the elastic restoring force of the inner layer bag is sufficiently generated even when the first few drops of the content liquid are dropped, so that the residual liquid from the downstream side of the filter is sufficiently drawn by the inner layer bag from the first drop of the content liquid. It becomes possible to act. The restoring property of the inner layer bag may be obtained by the restoring elasticity of the inner layer itself, or may be obtained by a force for inflating the inner layer due to the weight of the content liquid in the inner layer bag. Also good.

  The plug is provided on the lower surface side of the top portion of the cover, a plug holder provided with the fitting portion so as to be opened upward so that the plug body can be assembled from above, a cover having a top portion, and A filter and the plug body may be provided, and the cover may be externally fitted from above to a plug holder in which the plug body is assembled. According to this, the assembly workability of the plug body is improved, and the plug body can be securely fitted by being pushed into the fitting portion from above. The stopper holder and the cover can be handled as a single assembly part in a state where the cover is integrally fitted. In the content liquid filling factory, the stopper as the assembly part is used as a bottle after filling the content liquid agent. What is necessary is just to attach to a mouth part, and improvement of mass-productivity and quality controllability is aimed at. In addition, the said discharge path is provided over a stopper holder and a cover, Preferably, the discharge nozzle part provided in the top part of the cover shall comprise the discharge path of the downstream of a filter.

It is principal part sectional drawing at the time of sealing of the discharge container with a filter which concerns on 1st Embodiment of this invention. It is principal part sectional drawing at the time of seal | sticker opening of the container. The stopper in the container is shown, (a) is a plan view and (b) is a longitudinal sectional view. It is principal part sectional drawing at the time of sealing of the discharge container with a filter which concerns on 2nd Embodiment of this invention. It is principal part sectional drawing at the time of seal | sticker opening of the container. The stopper holder in the container is shown, (a) is a plan view and (b) is a longitudinal sectional view.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.

  FIG.1 and FIG.2 has shown the eye drop container 1 as a discharge container provided with the lamination peeling bottle which concerns on one Embodiment of this invention. The basic configuration of the eye drop container 1 is the same as that of Patent Documents 1 and 2 described above. The eye drop container 1 includes a laminated bottle 2 having an inner and outer two-layer structure formed by blow-molding a bottomed cylindrical laminated parison, and the bottle 2. And a mouth plug 3 mounted on the mouth portion 2a. The mouth plug 3 is provided with a discharge passage for discharging the liquid content. Further, a filter 33 and a plug body 34 that seals the discharge path until the first discharge on the upstream side of discharge of the filter 33 are provided in the discharge path of the plug 3. By turning the laminated bottle 2 upside down and squeezing the body part by pressing, the content liquid (fluid) inside the bottle 2 passes through the discharge passage in the plug 3 and is dripped from the tip nozzle part 3a. .

  The laminated bottle 2 has a laminated structure of an outer layer bottle 21 (squeeze bottle) constituting an outer layer and an inner layer bag 22 (fluid containing bag) constituting an inner layer. The outer layer bottle 21 and the inner layer bag 22 both have a cylindrical mouth portion and a body portion having an elliptical cross section immediately after blow molding. The outer layer bottle 21 can be formed of, for example, a synthetic resin material such as PET or SBS, and the inner layer bag 22 is a synthetic resin having a property of easily peeling from the outer layer bottle 21 (for example, polyolefin such as polypropylene or polyethylene). It is even better if it is a material that can be molded by) and resistant to electron beam sterilization or γ ray sterilization. The mouth portion of the bag 22 constitutes an opening portion for discharging the content liquid, and the opening portion of the bag 22 is fixedly connected to the mouth portion of the outer layer bottle 21.

  The outer bottle 21 is provided with a cylindrical mouth portion at the upper end of a bottomed cylindrical body that can be elastically squeezed and deformed through a shoulder that gradually decreases in diameter as it moves upward. is there. The outer layer bottle 21 may have any structure. However, as disclosed in Patent Document 2, the front and rear wall portions may be rigid wall portions. The outer bottle 21 is provided with an introduction hole (not shown) for introducing outside air between the outer bottle 21 and the inner bag 22. The introduction hole is preferably provided in the body portion of the outer layer bottle 21 as disclosed in Patent Document 2, but can also be provided in the bottle bottom portion or the mouth portion.

  The inner layer bag 22 has a film shape and is easily contracted and deformed as the content liquid decreases. On the other hand, after discharging the content liquid, the front end nozzle portion of the discharge path on the downstream side of the filter 33 is discharged. It has a restoring elasticity for sucking back the liquid content remaining in 3 a to the upstream side of the filter 33. On the other hand, the mouth portion of the inner layer bag 22 is formed to be relatively thick compared to the trunk portion.

  The plug 3 includes a cylindrical plug holder 31, a cover 32 fitted around the plug holder 31, the filter 33 and the plug body 34. The center of the stopper holder 31 penetrates in the vertical direction so as to form a discharge path for the liquid contents. The cover 32 has a disk-like top portion 32a (top plate portion), and is formed so that the nozzle portion 3a penetrates in the vertical direction at the center portion of the top portion. A discharge path for discharging the content liquid stored in the inner layer bag 22 is constituted by the central discharge path. In addition, the whole top part may be comprised by the nozzle shape.

  The stopper holder 31 includes a cylindrical base portion 31a that is externally fitted to the mouth portion of the outer layer bottle 21, and a content liquid outlet portion 31b that is integrally formed inside the base portion 31a and has a smaller diameter than the base portion 31a. The content liquid lead-out part 31b is fitted in the bottle mouth part 2a in a liquid-tight manner. A plug fitting recess 31c (fitting portion) is formed in the upper open portion at the upper end portion of the content liquid outlet portion 31b. The inner peripheral surface of the plug holder 31 is formed so as to gradually increase in diameter from the fitting portion 31c to the upper side, and is formed at the upper end portion (downstream end portion) of the plug holder 31. The elastic support portion 35 of the plug body 34 is accommodated in the mounting recess (internal space).

  The cover 32 is integrally assembled by being externally fitted to the plug holder 31 from above, and the filter 33 is disposed on the lower surface side of the top portion 32a before the assembly. The tip nozzle part 3a of the plug 3 is provided in the center part of the cover 32, and the content liquid agent which passed the filter 33 is discharged outside from the tip nozzle part 3a.

  Examples of the filter 33 include a membrane filter, a sintered body filter, a hydrophilic porous flat membrane, and a hydrophobic porous flat membrane from the discharge downstream side (outside the container) to the discharge upstream side (inside the container). Those capable of preventing permeation of pathogenic microorganisms and viruses can be appropriately used. The filter 33 is disposed on the discharge downstream side of the plug body 34, and the outer peripheral edge portion of the filter is welded to the upper end portion of the plug holder 31.

  The plug 34 is formed in a disk shape with a central portion slightly bulging downward, and is fitted into the fitting portion 31c in a liquid-tight manner. In the present embodiment, the plug 34 is pushed into the fitting portion 31c from above, so that the plug 34 is not detached from the fitting portion 31c due to a slight increase or vibration of the bottle internal pressure during bottle storage or transportation. A fitting force is generated. In the present embodiment, the elastic support portion 35 that supports the plug body 34 is integrally formed with the plug body 34 to form one plug member. The elastic support portion 35 biases the plug body 34 fitted in the fitting portion 31c upward (in a direction in which the plug body 34 is detached from the fitting portion 31c), and the plug body 34 is detached upward from the fitting portion 31c. After that, the plug body 34 is supported at the disengaged position, that is, the position where the plug body 34 is spaced upward from the fitting portion 31c. The urging force by the support portion 35 is made smaller than the fitting force.

  More specifically, as shown in FIG. 3, the plug member having the elastic support portion 35 and the plug body 34 of the present embodiment is made of a molded product having elasticity such as polyethylene, polypropylene using a metallocene catalyst, and an elastomer. The elastic support portion 35 includes a cylindrical base portion 35a fitted in the internal space of the upper end portion of the plug holder 31, and a pair of front and rear semicircular arc-shaped elastic connection portions 35b connecting the base portion 35a and the plug body 34. Are integrally formed. The outer diameter of the plug body 34 is smaller than the inner diameter of the base portion 35a, and the content liquid that uniformly flows out from the periphery of the plug body 34 detached from the fitting portion 31c passes through the inner peripheral portion of the base portion 35a and enters the filter 33. It is designed to flow towards. In addition, the elastic support part 35 may be comprised as a member different from the plug body 34, for example, can also be comprised by a spring etc. In addition, the number of elastic connecting portions 35b may be any number or strength that allows the plug body 34 to be maintained at a position separated from the fitting portion 31c, regardless of the number of the elastic connecting portions 35b.

  According to the eye drop container 1 according to the embodiment, before the first discharge, the discharge passage in the plug 3 is reliably closed by fitting the plug body 34 into the fitting portion 31c as shown in FIG. Even if the liquid agent has high permeability, it can be surely prevented from oozing out from the plug 34 to the downstream side, and the occurrence of an air lock caused by the filter 33 getting wet can be prevented.

  When the first discharge is performed, the bottle body is squeezed and deformed so as to close the introduction hole with a finger while the container 1 is inverted, and the internal pressure of the inner layer bag 22 is increased. As shown, the plug 34 is pushed up from the fitting portion 31c. At this time, since the pushing-up force of the plug body 34 is assisted by the elastic connecting portion 35b, a smooth initial discharge operation can be performed. Further, at the time of the first discharge, the air between the filter 33 and the plug 34 is pushed out by the content liquid from the filter 33 which is still in a dry state, and thereafter, it is filled with the content liquid until just below the filter 33. Thus, the filter 33 is always wet by the liquid content.

  During the second and subsequent discharges, since the inner layer bag 22 is always in communication with the filter 33, the squeeze force of the bottle body for discharge is reduced, and a smooth discharge operation can be performed. . Further, since the outside air cannot pass through the wet filter, the outside air is not introduced upstream of the filter after the second time, and the discharge failure due to the occurrence of the air lock state does not occur. Furthermore, since the liquid agent remaining in the downstream side of the filter 33, that is, in the discharge nozzle portion 3a is sucked back to the upstream side of the filter 33 due to the restoring property of the inner layer bag 22, the propagation of bacteria in the nozzle portion 3a can be prevented.

  FIGS. 4-6 has shown the discharge container 1 with a filter concerning 2nd Embodiment of this invention, about the structure similar to the said 1st Embodiment, attaches | subjects the same code | symbol and abbreviate | omits detailed description, A different structure The effect will be described.

  In the present embodiment, the plug body 34 is formed of an elastic material such as silicon rubber, chlorinated butyl rubber, or elastomer, and includes a plug flange 35a (base portion) and a connector sleeve 35b (elastic connection portion) constituting the elastic support portion 35. A plug head 34 constituting the plug 34 is integrally formed. The plug flange 35a is substantially ring-shaped, and the cross-sectional shape is a triangular shape that increases in thickness toward the outer side in the radial direction. The connector sleeve 35b is substantially cylindrical, and one end in the axial direction is integrally connected to the inner peripheral edge of the plug flange 35a, and the other end in the axial direction is integrally connected to the outer peripheral edge of the plug head 34. Further, the connector sleeve 35b has a relatively thin and flexible structure so that it can be easily deformed. Further, as shown in FIG. Yes. The state shown in FIG. 5 is the initial shape of the connector sleeve 35b. As a matter of course, the plug head 34 is not provided with a cross-shaped orifice as described in Patent Document 2.

  Further, the content liquid outlet 31b of the valve holder 31 is formed so that the inner surface of the upper end portion gradually becomes smaller in diameter toward the upper side, and the fitting hole portion 31c (fitting portion) is configured by the minimum diameter portion. Then, the plug head 34 is fitted into the fitting hole 31c from above in a liquid-tight manner. In addition, when the plug head 34 is spaced upward from the fitting hole 31c, the content liquid can be discharged from the outer periphery of the plug head and the plug flange to the filter 33 above the fitting hole 31c. As shown in FIG. 6, at least one flow groove 31 d is provided at a predetermined position in the circumferential direction on the inner peripheral surface of the valve holder 31. In the illustrated example, the liquid content is uniformly distributed over the entire circumference of the plug head 34. Eight flow grooves 31d are formed at equal intervals in the circumferential direction so as to flow out. This circulation groove 31d is formed in a substantially L-shaped longitudinal section.

  Furthermore, in this embodiment, in order to more reliably support the state in which the plug head 34 is separated from the fitting hole 31c, the inner surface of the lower side portion of the side wall of the L-shaped flow groove 31d is pushed up by the content liquid. The plug head 34 may be configured to be fitted or locked. According to such a configuration, the plug head 34 is reliably supported at a position spaced upward from the fitting hole 31c. . Of course, the plug head 34 may be supported at a position disengaged upward from the fitting hole 31c only by the elastic restoring force of the connector sleeve 35b.

  Also in the container 1 according to the present embodiment, before the first discharge, as shown in FIG. 4, the plug head (plug body) 34 is fitted into the fitting portion 31 c to prevent the content liquid from oozing out reliably. After the second discharge, the plug head 34 is supported at the disengaged position as shown in FIG. 5, so that the content liquid can be discharged with a light squeeze force.

  The present invention is not limited to the above-described embodiment, and can be appropriately changed in design. For example, the plug body may be formed of a spherical member without providing the base portion and the elastic connection portion. The present invention can be applied to various dropping containers other than eye drops containers and other discharge containers. Moreover, the discharge container with a filter according to the present invention can also be configured as a two-component mixing container. In this case, for example, a first agent such as a hardly soluble powder agent is provided in the space between the stopper and the filter. While containing the second agent such as a solution in the inner bag of the laminated bottle, mixing the first agent and the second agent by detaching the plug from the fitting portion at the time of use, It can be used as a discharge container for liquid mixture.

DESCRIPTION OF SYMBOLS 1 Discharge container with a filter 2 Laminated bottle 21 Outer layer bottle 22 Inner layer bag 3 Port stopper 3a Discharge nozzle 3b Support part 31 Plug holder 31c Fitting part 32 Cover 33 Filter 34 Plug body 35 Elastic support part

Claims (2)

An outer layer bottle provided with a mouth at the upper end of a squeeze-deformable body, an inner layer bag provided inside the outer layer bottle and having an opening connected to the mouth of the outer layer bottle; and A plug attached to the mouth portion, the outer layer bottle has an introduction hole for introducing outside air between the outer layer bottle and the inner layer bag, and the mouth plug has an inside of the inner layer bag. In a discharge container with a filter provided with a discharge path for discharging the content liquid contained in the filter, and provided with a filter in the discharge path,
A fitting portion located upstream of the filter is provided in the discharge path of the cap, and the inner pressure of the inner layer bag rises due to squeeze deformation of the body portion of the outer layer bottle so as to be detached from the fitting portion. The plug further includes a plug body that fits into the fitting portion, and the discharge passage is closed by the plug body fitted into the fitting portion, and after the plug body is detached from the fitting portion, A discharge container with a filter, which is in a liquid passing state between the filter.   The plug is provided on the lower surface side of the top portion of the cover, a plug holder provided with the fitting portion so as to be opened upward so that the plug body can be assembled from above, a cover having a top portion, and The discharge container with a filter according to claim 1, further comprising a filter and the stopper, wherein the cover is externally fitted to a stopper holder in which the stopper is assembled.

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