JP3148021U - Sealed container - Google Patents

Abstract

In a sealed container whose opening is ultrasonically welded by a sealing member, the occurrence of pinholes at the time of ultrasonic welding is prevented, and the liquid at the opening location is used for opening a simple one-touch cap for use. To provide a container that can be sealed. Furthermore, in order to improve usability for the user, a container is provided that takes into account the directionality of the container. In a sealed container in which an opening of a resin bottle 1 having an opening 2 and a container 3 is ultrasonically welded by a sealing member 10, the sealing member is sealed with a thin film that can be opened at break. Provided with a path, and the thin film is formed to be shifted upward or downward within a range of 1.0 to 10.0 mm with respect to a virtual plane passing through a boundary (ultrasonic welded portion) between the opening end and the sealing member. A sealed container. [Selection] Figure 1

Description

  The present invention relates to a container in which a resin bottle having an opening and a housing is sealed, and more particularly to a sealed container having a thin film that can be opened at a sealing member that seals the opening by ultrasonic welding.

  Containers for storing chemicals, etc., are circulated in a sealed state contained in glass or resin containers sealed with screw caps, or in resin bottles molded by blow molding, extrusion molding, injection molding, etc. In some cases, the user takes some operation and opens the contents when used. In particular, the latter container is preferable in that it can be ensured that a chemical solution or the like is kept in a completely sealed state until just before use, and that the user himself can confirm (sealing / opening).

  In the blow molding, a molten resin is formed into a cylindrical polymer melt called a parison, the parison is sandwiched between molds, compressed air is blown from a nozzle, and the expanded parison is brought into contact with the mold wall surface. It is processed into the shape. At this time, a sealed container can be obtained by filling a chemical solution or the like from a nozzle and sandwiching the mouth portion of the container with a mold and performing heat molding. Since this processing process can manufacture a large amount of products by a series of flows, it is an excellent manufacturing method that is inexpensive and ensures aseptic conditions. However, since the opening of the container is sealed from the outside of the container, there is a problem when it is desired to accurately form a thin film part that is broken when opened.

  There are other problems with this fracture. For example, it is easy to leak during storage from between the puncture tool for the opening provided in the cap and the rupture portion. This is because, when opening with a piercing tool, a resin joint peculiar to blow molding (commonly referred to as a parting line) is easy to open, and a tear or the like easily occurs. As a solution to this problem, there is one related to an opening structure for preventing liquid leakage after opening of a container (Patent Document 1). According to this, an O-ring or a ring around a piercing tool for an opening provided in a cap. A container has been proposed in which a packing is provided to ensure liquid tightness after opening. This proposal solves the above-mentioned problem, but has another problem of increasing the number of steps for attaching an O-ring or packing.

  As a technique for accurately forming a thin film portion, there is a technique (Patent Document 2) in which a container having an opening is formed by extrusion molding or injection molding, and after filling a content liquid or the like, a separately formed stopper is ultrasonically welded. . In this container, a closing plate is connected to the inside of the plug through a thin portion that can be easily broken, and the thin portion is broken and opened by pulling a pull ring erected on the closing plate. And it is the technique proposed in order to cope with a pinhole being easy to generate | occur | produce in a thin part when ultrasonically welding this plug. According to this technology, die cutting in plug molding is performed so as not to receive a large frictional stress, so that the thin-walled portion does not extend and the occurrence of pinholes during ultrasonic welding in the subsequent process is avoided. is doing.

  Similarly, while making it difficult to transmit vibration during ultrasonic welding and making it easy to remove the closing plate, a proposal has been made so that pinholes are not generated and the opening operation can be performed more easily (Patent Document 3). There is also. In this proposal, the vibration at the time of ultrasonic welding is hardly transmitted by positioning the thin part of the plug body inside the upper edge side of the dispensing cylinder and separating it from the flange around the base part of the plug body. And since the welding foot of the cap is connected to the closing plate by thermal welding, when the cap is rotated in the removing direction, the closing plate is rotated through the welding foot along with the rotation, and the thin wall portion is broken and opened. It is done.

  In addition, there is an ultrasonic absorbing portion provided between the container welded portion and the dispensing cylinder at the time of ultrasonic welding to prevent the occurrence of pinholes (Patent Document 4). For example, it does not disclose the case of a container that has a protruding part in the cap and breaks the thin part by advancing it at the time of opening, but with a so-called one-touch cap that can be easily and repeatedly sealed after opening It is not intended for containers. Further, the portion subjected to ultrasonic welding does not take into account, for example, the treatment of the molten resin at the time of welding or the contact state of the ultrasonic welding horn.

  On the other hand, as an example of using a so-called one-touch cap for opening a sealed container, an opening and liquid passing member after the opening of the container is pierced and opened by the opening and liquid passing member mounted in the cap. Related to a container sealed with a polymer material excellent in tightening force that secures tightening and prevents its detachment (Patent Document 5), a spike for breaking through the sealing portion and extracting liquid, and this spike There is an annular holding member that surrounds the bottle, and when the bottle is opened in the holding portion, the sealing portion is fitted into the sealing portion, so that the sealing portion is prevented from bending and deforming and can be reliably opened (Patent Document 6). is there.

  However, for these, since all the sealed containers are molded by blow molding, as pointed out at the beginning, there is a problem in terms of accurately finishing the thin part at the time of opening, and each container has a problem at the time of opening work. There was room for improvement in terms of providing constant quality containers with varying required forces.

JP-A-8-183555 JP-A-7-257564 JP-A-8-72918 Japanese Patent Laid-Open No. 10-16950 Japanese Patent Laid-Open No. 10-119995 JP 2007-302333 A

  The problem to be solved by the present invention is to prevent the occurrence of pinholes during ultrasonic welding in a sealed container whose opening is ultrasonically welded by a sealing member, and use a simple one-touch cap for opening. An object of the present invention is to provide a container that can ensure the liquid tightness of the opening location.

  Furthermore, in order to improve the convenience for the user, a container in which attention is paid to the directionality of the container is also provided.

  In the present invention, in order to solve the above-mentioned problem, in a sealed container in which the opening of a resin bottle having an opening and a container is ultrasonically welded by a sealing member, the sealing member is a thin film that can be opened at break. The thin film is upward or downward in a range of 1.0 to 10.0 mm with respect to a virtual plane passing through the boundary (ultrasonic welding portion) between the opening end and the sealing member. It is characterized by being formed in a shifted manner.

  By forming the thin films in such a manner, the influence of ultrasonic welding can be reduced and the occurrence of pinholes can be avoided. Here, the virtual plane passing through the ultrasonic welded portion is, for example, a plane drawn by a circle of the welded portion that is generated when the opening is a circle and the contacted portion is covered with a disk-shaped sealing member and the contact portion is ultrasonically welded. Yes, if the opening is a square, it is a quadrangle, and if it is a polygon, it is a polygonal plane. Further, when the welded portion is viewed in a bow shape or a chair shape when viewed from the side, the thin film is formed by being shifted upward or downward from the highest position or the lower position in the lateral view.

  Particularly in the present invention, an annular welding rib is provided around the sealing member so as to contact the end of the opening, and is melted by ultrasonic welding on at least one of the outer peripheral side and the inner peripheral side of the welding rib. It is preferable that a concave groove for accommodating at least a part of the welding rib is formed. The recessed groove to be stored at this time is not necessarily formed all around the weld rib, and the groove may be interrupted in some places or may be shallow. Alternatively, the inner and outer peripheral sides may be alternately formed. In short, it is sufficient that the sealing member and the end of the opening portion can be reliably brought into contact and sealed by forming a escape field for the resin melted by ultrasonic welding.

  Moreover, it is more preferable that the ultrasonic welding horn contact portion of the sealing member rises thicker than the non-contact portion. The welding rib is formed on the opposite surface side of the thickened portion, so that the ultrasonic wave from the horn can be efficiently transmitted to a desired welding portion of the sealing member.

  Further, in the present invention, the lid further includes an openable / closable lid that covers the sealing member, and the lid extends from the top plate that covers the sealing member and the top plate for fixing to the resin bottle. A cylindrical portion, a protrusion extending substantially below the center of the top plate for breaking the thin film, a through hole extending through the protrusion to the top surface of the top plate, and covering the top surface of the top plate and the through hole It is preferable to include an openable and closable cap portion connected via a hinge from the periphery of the top plate for closing the top plate.

  The lid is a so-called one-touch cap, which can easily seal a chemical solution or the like used in the container. Conventionally, there is a one-touch cap with a spike formed for opening, but the combined bottle is sealed by blow molding, so it is difficult to always make the thickness of the fracture part constant, Some users may find it unusable. In particular, a one-touch cap having a hinge portion is harder to perform a breaking and opening operation than a general screw-type cap. Therefore, the effect of combining with the bottle according to the present invention, that is, the good operability to break through the thin film controlled to a constant thickness is unprecedented.

  And in this invention, it is preferable that the holding | maintenance part which accommodates the pipe line end part of the said sealing member is provided in the outer periphery of the projection part (for thin film fracture | rupture) of the said cap. With this holding portion, not only can the pipe end having the thin film be securely fixed and opened, but also leakage of the contents after opening can be prevented.

  Furthermore, it is preferable that a positioning means for fixing the hinge connecting portion so as to be positioned on the back surface with respect to the front surface of the bottle is provided on the cylindrical portion extending from the periphery of the top plate. This is because the opening position can be more visually indicated to the user when the one-touch cap is opened.

  The hermetically sealed container of the present invention can effectively prevent the occurrence of defects such as pinholes in the thin film during ultrasonic welding, and can be reliably sealed by ultrasonic welding. In addition, it is possible to improve the user's operability by using a simple one-touch cap in use, while ensuring the liquid tightness of the opening location.

  Furthermore, in order to further improve the convenience for the user, it is possible to provide a container in which the opening position of the one-touch cap is easily visible and attention is paid to the direction of the container.

The present invention will be described below with reference to the drawings.
In FIG. 1, the state which assembled the resin-made bottles 1 and the sealing member 10 which have the opening part 2 and the accommodating part 3 of this invention is shown. The resin bottle 1 has a screw 4 formed on the outer periphery of the bottle neck 5 to be screwed into a lid prepared separately. This screw 4 is for connection with a lid, and it may be a double screw or a groove that fits by simply pushing the lid. The bottle neck portion 5 is generally cylindrical when connected by screwing or the like, but when fitting, the lid does not rotate by making it into a polygonal column, so it can be easily fixed and attached to the lid. It can have directionality.

  When the resin bottle 1 is formed by injection molding or the like and filled with a chemical solution or the like stored in the bottle from the opening 2, the insertion portion 11 of the sealing member 10 is inserted into the opening 2, and the content liquid Is in a sealed state. The outer diameter of the insertion portion 11 is preferably substantially equal to the inner diameter of the opening. As a result, the sealing member 10 is not detached by simple vibrations while the bottle 1 is being conveyed by a conveyor or the like, and contamination inside the bottle can be prevented until it is reliably sealed by ultrasonic welding. is there. In FIG. 1, the opening 2 is generally circular, but may be oval, rectangular, or the like, and an external fitting insertion portion 11 corresponding to the shape may be applied. Furthermore, in FIG. 1, although the insertion part 11 is shown in the cylinder shape, you may be comprised from several fragmentary wall surfaces. In addition, since rotation with A as the central axis is prevented by making the opening 2 somewhat elliptical, the detachment of the blocking member 10 can be more reliably prevented.

  FIG. 2 shows an enlarged sectional view of the periphery of the opening 2 of the resin bottle 1 and the sealing member 10. At the center of the sealing member 10, there is a pipe line 20 having a thin film 21 that can be opened at break. The thin film 21 has a thickness of 0.1 mm to 0.5 mm so that it can be broken, and can be controlled to a uniform thickness as a whole. This precise thickness control is an advantage of separately preparing a sealing member as compared with the case of forming a sealed container by blow molding. Further, the thin film 21 is formed as a portion having a smaller thickness as shown in FIG. 3, such as a radial groove 22 (conversely thicker than the other part, which may be formed as a convex ridge as a trunk), or an annular groove 23. Therefore, it becomes easy to design details for improving the operability at the time of breaking.

  As shown in FIG. 2, the sealing member 10 is placed on the opening end 6 of the opening 2, and the thin film 21 is formed at a position 3 mm above the virtual plane B passing through the boundary. By forming in such a manner, it is possible to effectively prevent the occurrence of pinholes and cracks in the thin film during ultrasonic welding of the boundary portion. Although it is shifted to the upper position in this figure, it can also be formed to be shifted to a position lower than the virtual plane B. In addition, although the plane of the thin film 21 is preferably formed substantially parallel to the virtual plane B, it may be formed slightly inclined.

  The reason why the thin film 21 is shifted is to block the influence of ultrasonic waves as described above. However, considering the case where the thin film 21 is opened later, the length of the protrusion for opening becomes too long, which is a problem of strength. It is more desirable that it is formed so as to be shifted to the upper position so as not to cause the problem. The degree of shifting is 1.0 to 10.0 mm, preferably 2.0 to 4.0 mm, although it depends on the resin forming the sealing member 10. If it is less than 1.0 mm, there is a possibility that problems such as pinholes can be reliably prevented, and even if it is shifted more than 10.0 mm, it is only separated more than necessary.

  Also, in the figure, the virtual surface formed by the opening end is a flat surface, but depending on the design of the opening end 6, it can be processed into a shape that can be seen as a bow or a chair when viewed from the side. is there. In such a case, the closest approach distance between the thin film plane and the opening end 6 may be in the range of 1.0 to 10.0 mm.

  In the present invention, an annular welding rib 12 is provided around the sealing member 10 so as to be in contact with the opening end 6, and welding ribs melted by ultrasonic welding are provided on the outer peripheral side and inner peripheral side of the welding rib 12. It is preferable that the concave grooves 13 and 14 that can accommodate at least a part are formed. As shown in FIG. 2, the welding rib 12 has a triangular shape with a cross section of 0.5 mm in height, but may have various shapes such as a quadrangular shape, a pentagonal shape, and a bullet shape. What is necessary is just to set this height suitably in the range of 0.3 mm-1.0 mm. Further, the concave groove has a depth of about 0.3 mm and is continuously formed on both the inner and outer circumferences, but may be formed only on one side or intermittently. The depth of the concave groove may be a depth that has a volume that can accommodate all of the molten resin at the time of ultrasonic welding and that has a volume smaller than that. In short, it is sufficient that the sealing member 10 and the opening end 6 can be reliably brought into contact with each other and sealed by forming an escape field for the resin melted by ultrasonic welding. Further, a groove into which the tip end of the welding rib 12 enters may be formed in the opening end 6.

  The tip of the insertion portion 11 of the sealing member 10 is tapered so that it can be easily inserted into the opening 2. And when the inner peripheral wall surface of the bottle neck part 5 and the outer peripheral wall surface of the fitting insertion part 11 closely_contact | adhere, not only the sealing effect by ultrasonic welding but leakage of contents, such as a chemical | medical solution accommodated in the accommodating part 3, is prevented. It is preventing. This is because it is very important to maintain the liquid-tightness of the inner solution from the increase in the inner pressure because the contents are extracted by squeezing the bottle housing 3.

  The site | part 15 which the ultrasonic welding horn (not shown) of the sealing member 10 shown in the figure contact | abuts is on the opposite surface of the welding rib 12, and is rising thicker than the site | part 16 which does not contact this horn. By raising the part 15 more than the other parts, the ultrasonic wave from the horn can be easily transmitted, and the horn can be prevented from contacting the unnecessary part and the ultrasonic conduction can be prevented. Get higher. That is, when the bottle 1 and the sealing member 10 are molded with the same resin and the raised portion 15 is provided and the case where the portion 15 is flattened without providing the relevant portion, the defect occurrence rate due to ultrasonic welding can be significantly reduced. is there. Further, since there is a fitting insertion portion 11 extending downward from the ultrasonic welding portion, this portion has the maximum cross-sectional thickness of the sealing member. If it does so, a difference will arise in the cooling after a shaping | molding process, and it will be easy to generate | occur | produce a shaping | molding defect. Therefore, by designing the wall thickness as shown in the figure, there is an effect of increasing the processing accuracy.

  By the way, the resin for the bottle and the resin for the sealing member are not necessarily the same, but the use of the same resin is preferable because the adhesive strength by ultrasonic welding can be increased and the manufacturing cost can be reduced. Specific examples of the resin material include acrylonitrile / styrene resin, acrylonitrile / butadiene / styrene resin, polyvinyl chloride resin, polyacetal resin, polyamide resin, polyarylate resin, thermoplastic elastomer, polyether ether ketone, polysulfone resin. , Low density polyethylene, high density polyethylene, polycarbonate resin, polystyrene resin, polyphenylene ether resin, polyphenylene sulfide resin, polybutadiene resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polypropylene resin, methacrylic resin, and the like. In addition, for the purpose of improving heat resistance, cold resistance, impact resistance, etc., a polymer alloy material obtained by mixing these various resin materials can be used, or the characteristics of each additive can be modified. Furthermore, the recycled recycling molding material can also be mixed and used.

  FIG. 4 shows a cross-sectional view of a so-called one-touch cap 40 as a preferred example of the lid used in the present invention. The one-touch cap 40 opens the sealed container of the present invention and also simply seals the contents in use again. Therefore, the cap 40 has a top plate 41 that covers the sealing member, and a tubular portion 42 that extends downward from the periphery of the top plate 41 for screwing and fixing the neck portion 5 of the resin bottle 1. A projection 43 for breaking the thin film 21 of the sealing member 10; a through hole 44 extending through the projection 43 to the top surface of the top plate; a nozzle 45 for extracting a stored chemical and the like; and a top plate An openable / closable cap portion 47 is provided that covers the upper surface and is connected via a hinge 46 from the periphery of the top plate for closing the through hole 44 of the nozzle 45.

  By rotating the one-touch cap 40 screwed to the neck portion 5 of the resin bottle 1 by the cylindrical portion 42 in the tightening direction, the protrusion 43 is inserted into the conduit 20 of the sealing member 10, and the thin film 21 is removed. It will break through. The tubular portion 42 may be provided with a stopper piece 50 as a pill fur proof for preventing inadvertent screwing of the one-touch cap 40. Thereby, the sealed state of the container in the distribution stage can be guaranteed, and the user can purchase with confidence.

  Although the protrusion 43 is formed to be tapered, it provides a space for accommodating the fragments of the thin film 21, and communicates a hole through which the internal solution can be discharged sufficiently through the thin film. Further, it is preferable that the tip of the nozzle 45 on the side opposite to the protruding portion 43 is tapered outwardly, and has a shape that improves liquid drainage. This is because depending on the inner solution, there are ones having a high viscosity and ones having poor liquid drainage, and if they remain in the nozzle 45, they may cause microbial contamination.

  Around the protruding portion 43, a holding portion 53 that houses the distal end portion of the pipe line 20 of the sealing member 10 is provided. The holding portion 53 is for reliably pouring the inner solution through the through-hole 44 after the thin film is broken. The pipe line 20 is sandwiched between the protruding portion 43 and the holding portion 53 and is brought into close contact with each other to make the liquid tight. Secure. Furthermore, the adhesiveness is further increased by giving the base of the protrusion 43 a bulge toward the outer periphery. Since the sealing member 10 and the one-touch cap 40 are not particularly bonded by an adhesive or melting, it is necessary to pay attention to liquid leakage. Therefore, not only the clearance between the outer peripheral wall of the projection 43 and the inner peripheral wall of the pipe line 20 is eliminated, but also liquid-tightness is ensured.

  The cap part 47 is formed with a seal pin 51 for entering the tip opening of the nozzle 45 and sealing it securely. This is because the sealing may not be complete by simply covering the nozzle 45 from above, and packing such as silicon rubber may be used instead of the seal pin 51. In FIG. 4, a guide rib 52 is provided around the seal pin 51, and this captures the outer periphery of the tip of the nozzle 45. This is because with this structure, even with a simple one-touch cap, it is possible to ensure a firm seal and guide the seal pin 51 to the tip opening of the nozzle 45.

  FIG. 5 shows a cross-sectional view of the resin bottle 1, the sealing member 10, and the one-touch cap 40 after being assembled. In this figure, the main part is shown when the sealed container of the present invention having the above-described configuration is in a distribution state (left figure: with thin film 21) and in a used condition (right figure: thin film 21 is broken open). It is a thing. As can be seen from this figure, the three parts are closely engaged with each other while the positional relationship is accurate. Such a situation cannot be easily provided by using a conventional sealed container produced by so-called blow molding.

  In the sealed container of the present invention having the above-described configuration, it is preferable that the cylindrical portion 42 is further provided with positioning means for fixing the hinge 46 so as to be positioned on the back surface with respect to the front surface of the bottle. This is because when the one-touch cap 40 is opened, the opening position can be more visually indicated to the user.

  The present invention circulates while maintaining the sealed state with certainty, can be opened with good operability by the user, and is further easy to use continuously by adopting a one-touch cap mechanism. Such a sealed container can be suitably used for, for example, a bottle for storing a contact lens care solution.

It is the schematic which shows the state which assembles the resin bottles 1 and the sealing member 10. FIG. 2 is an enlarged cross-sectional view of the periphery of the opening 2 of the resin bottle 1 and the sealing member 10. 3 is an enlarged view of a thin film 21. FIG. 3 is a cross-sectional view of a one-touch cap 40. FIG. It is sectional drawing which shows the state after assembling the resin-made bottles 1, the sealing member 10, and the one-touch cap 40. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Resin bottle 2 Opening part 3 Storage part 10 Sealing member 12 Welding rib 15 Ultrasonic welding horn contact part 21 Thin film 40 One-touch cap 43 Protrusion part 46 Hinge 47 Cap part 50 Stopper piece 53 Holding part

Claims (6)

In the sealed container in which the opening of the resin bottle having the opening and the housing is ultrasonically welded by the sealing member,
The sealing member comprises a pipe line sealed with a thin film that can be opened at break.
The thin film is formed to be shifted upward or downward within a range of 1.0 to 10.0 mm with respect to a virtual plane passing through a boundary (ultrasonic welded portion) between the opening end and the sealing member. And sealed container. An annular welding rib is provided around the sealing member so as to contact the end of the opening,
The concave groove for accommodating at least a part of the welding rib melted by ultrasonic welding is formed on at least one of the outer circumferential side and the inner circumferential side of the welding rib. Sealed container.   3. The sealed container according to claim 1, wherein the ultrasonic welding horn contact portion of the sealing member swells thicker than the non-contact portion. It further has an openable / closable cover that covers the sealing member,
The lid
A top plate for covering the sealing member, a cylindrical portion extending from the periphery of the top plate for fixing to the resin bottle, a protrusion extending substantially below the center of the top plate for breaking the thin film, A through-hole that extends through the protrusion and extends to the top surface of the top plate, and a cap portion that is openable and closable connected through a hinge from the periphery of the top plate to cover the top surface and close the through-hole.
The sealed container according to any one of claims 1 to 3, further comprising:   The sealed container according to claim 4, wherein a holding portion that houses a pipe end portion of the sealing member is provided around the outer periphery of the protruding portion.   The positioning part for fixing so that the said hinge connection part may be located in a back surface with respect to the bottle front surface is provided in the cylindrical part extended from the said top-plate circumference | surroundings. 5. The sealed container according to 5.

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