JP4889098B2 - Liquid storage container - Google Patents

Description

  The present invention relates to a liquid storage container used when retailing a chemical solution or the like.

  The liquid storage containers used for retailing chemicals and the like were once made of glass, but today they are generally made of resin that is lightweight, excellent in durability, and can be molded into various shapes. When injecting a liquid into the resin container, it is common to prepare a bottle in advance and attach a separately manufactured lid after injecting the liquid. However, recently, a simultaneous molding and filling system (BFSS) in which a liquid is injected at the same time as a bottle is formed and the bottle is completed immediately after the liquid is injected has begun to spread. With this method, the entire bottle can be integrally molded with the same resin, and since there are no openings or joints at all, problems such as contamination and liquid leakage can be solved, and transportability and storage properties are improved. .

In order to take out the liquid after purchasing the product by BFSS as described above, it is only necessary to make a hole on the upper surface of the bottle. Therefore, a special lid is attached to the bottle, and this lid is provided with a needle-like spike for drilling. However, since drilling is performed manually, the diameter and direction of the hole are not fixed, and there is a risk that the liquid may splash in an unexpected direction and the body and surroundings may be soiled. Therefore, a product in which the spike is hollow like an injection needle and the liquid taken in the spike can be stably dropped from the spout on the upper surface of the lid is also widely used. In addition, it is necessary to protect the spout when not in use due to problems such as hygiene, and a cap that can be opened and closed is also provided. The following patent documents are mentioned as a specific example of this form.
Japanese Patent Laid-Open No. 10-119995

  Such an openable / closable cap is often integrated with a lid through a hinge or the like to prevent loss, and has an elastic band that acts as a spring so that the cap can be opened and closed reliably. Sometimes. This elastic band is arranged between a pair of hinges, and always generates a force to maintain this state when the cap is closed, thereby preventing inadvertent opening. When a lid incorporating such a hinge or elastic band is integrally molded with the same resin, it is necessary to use a flexible material.

  In addition to a cap or the like, the lid also needs a spike for opening the bottle as described above. Needless to say, the spike needs strength to break through the bottle, and it is preferable to use metal or hard resin. However, if the entire lid is formed of a hard resin, a portion such as a hinge or elastic band that requires flexibility cannot be configured. In order to solve this problem, it is possible to manufacture only the spike separately and incorporate it into the lid, but the manufacturing cost increases.

  The present invention has been developed based on such a situation, and an object thereof is to provide a liquid storage container that can reliably open a bottle by using a lid provided with an openable / closable cap and that can reduce the manufacturing cost.

The invention according to claim 1 for solving the above problem comprises a resin bottle capable of storing a liquid, and a lid attached to the bottle for dripping the liquid, the bottle having a neck portion. A cylindrical convex portion is formed at the distal end of the neck portion, the distal end surface of the convex portion is sealed by a partition, and the lid includes a trunk portion surrounding the neck portion, and an upper surface of the trunk portion A top plate for covering the wall, a spike for breaking through the partition wall, a spout for dropping the liquid flowing into the spike, an openable / closable cap for covering the spout, and connecting the cap to the body portion A hinge and an elastic band for applying an urging force to the cap, and on the back surface of the top plate, when the lid is attached to the bottle, the spike comes into contact with the partition wall. , holder for bending impossible supported in contact with the outer peripheral surface of the projecting portion Comprising a and the lid, which is a liquid container, characterized in that it is integrally molded by a polypropylene resin.

  A liquid storage container according to the present invention includes a bottle and a lid, and the bottle has a space for storing a liquid such as a chemical solution. Is formed. Further, the convex portion is formed at the tip of the neck portion, and is a cylindrical portion whose sectional diameter is narrower than that of the neck portion, and has substantially the same cross-sectional shape. In addition, the partition wall is a plate-like material that covers the front end surface of the convex portion, and prevents the liquid from flowing out. This bottle is integrally molded with resin, including the partition walls, and the interior is isolated from the outside so that liquid does not leak out. When dripping liquid, it is necessary to open the walls with holes. There is.

  The lid is manufactured separately from the bottle and is integrated with the bottle for the first time when it is used. The body, top plate, spike, spout, cap, hinge, and elastic band are the same as before. The barrel is formed in a cylindrical shape so as to surround the neck of the bottle, and an internal thread or the like is formed on the inner peripheral surface thereof to be integrated with the bottle. The upper end surface of the barrel is a flat top. It is blocked by a board. A spike for opening the bottle is formed on the back surface of the top plate, and a spout for dropping the liquid flowing into the spike to the outside is formed on the surface of the opposing top plate.

  Since the spout is open to the outside, there is a risk of foreign matter entering or inadvertently splashing the liquid, and the lid is provided with an openable / closable cap that covers the spout. The cap is connected to the trunk via a hinge to prevent loss. In addition, an elastic band for applying a biasing force to the cap is provided so that the cap can be kept closed (or opened). In addition, the hinge and the elastic band ensure flexibility and elasticity by adjusting the thickness thereof.

  The spike is in the form of an injection needle extending from the back surface of the top plate, and has a role of opening through the partition wall of the convex portion when the lid is attached to the bottle. Note that the liquid taken into the spike reaches the spout via a flow path that penetrates the inside of the top plate.

  The holding member is formed so as to extend from the back surface of the top plate of the lid, surrounds the periphery of the spike concentrically, and fits into the convex side surface of the bottle when the lid is attached to the bottle. In addition, before a spike contacts a partition, a holding member needs to fit in a convex part. As a result, when the lid is mounted, the holding member first fits into the convex portion, so that the convex portion is restrained and cannot be bent in the radial direction. Therefore, when the spike comes into contact with the partition wall, it always hits the center of the partition wall, and even at the stage where the spike pierces the partition wall, the convex portion can be prevented from bending. The holding member is generally formed in an annular shape without a break, but if there is no problem in function, it is possible to provide slits at several places. In addition, when the holding member is fitted into the convex portion, it is preferable that both are in close contact with each other. However, in this case, if there is no problem in function, there may be a minute gap between the two. Of course, the cross-sectional shape of a convex part and a holding member is free.

  With this configuration, when the lid is attached to the bottle, the convex portion is restrained by the holding member, so that deformation in the radial direction can be prevented, and the tip of the spike reliably hits the center of the partition wall. Since the center of the partition wall is most easily deformed and easy to punch, the spike is not deformed by the reaction force, and the bottle can be reliably opened through the partition wall.

  The present invention is characterized in that the lid provided with the holding members, spikes, caps, and the like described so far is integrally formed of polypropylene resin. Since the polypropylene resin is flexible when thinned, the polypropylene resin can be used as a hinge for fastening a cap that can be opened and closed to the body part, or as an elastic band that applies a biasing force to the cap. Moreover, since the strength can be ensured by increasing the thickness, it can be used as a spike that requires the most hardness in addition to the trunk and the cap. Therefore, it is possible to integrally mold the entire lid with polypropylene resin.

  The invention according to claim 2 specifies the shape of each part, the maximum length of the cross section of the convex portion formed on the bottle is 5 mm or more and 10 mm or less, and the thickness of the partition wall is 0.8 mm or more and 1.2 mm or less. Further, the spike formed on the lid is characterized in that the maximum length of the cross section at a position advanced 1.5 mm from the tip to the terminal side is 1 mm or more and 3 mm or less.

  Here, the maximum length of the cross section of the convex portion refers to the value at which the distance across the cross section cut into a circle is the longest. If the convex portion is a circular cross section, the maximum length is the diameter. It becomes the length of. In addition, it assumes that the convex part here is a cylinder shape with a fixed cross-sectional shape. Further, the thickness of the partition wall refers to the vicinity of the center, and may be thicker near the boundary with the convex portion. With respect to one lid, the position advanced 1.5 mm from the tip of the spike to the end side is a point advanced 1.5 mm in the axial direction with respect to the tip of the spike, and the maximum length of the cross section here is It regulates so that. If the spike is conical, the cross-sectional diameter at that point is the maximum length.

  The invention described in claim 3 relates to a partition wall of the bottle, wherein the partition wall is formed in a concave shape, and the spike can be guided to the center of the partition wall by the concave surface. Here, the concave surface means that the shape is a bowl shape whose center is depressed most. By making the partition wall concave in this way, when the spike comes into contact, the tip is guided to the center along the concave surface, and the same effect as the holding member can be expected. The shape of the concave surface can be selected freely such as a hemispherical shape.

  When the bottle is opened by forming the holding member so as to surround the spike on the back side of the lid as in the first aspect of the invention, the holding member fits into the convex portion, so the convex portion is in the radial direction. It is possible to prevent bending deformation. Therefore, a spike can be pierced in the center of the partition wall, and the bottle can be opened reliably. In addition to the spout, the lid according to the present invention is provided with a cap for protecting the spout, is connected to the cap with a hinge, and incorporates an elastic band that assists in opening and closing, so that it is excellent in convenience.

  Furthermore, since the entire lid including the spikes is integrally formed of polypropylene resin, the lid is completed by a single molding process using the same material, so that the manufacturing cost can be reduced. In addition, the spike which requires hardness can open a bottle reliably by a combination with a holding member, and also can construct | assemble the location where flexibility, such as a hinge and an elastic band, is requested | required without a problem.

  As in the invention described in claim 2, by restricting the numerical values of the shape of the convex portions and spikes, the opening operation can be carried out reliably without the convex portions and spikes being bent. There is no unreasonableness in the process such as casting, and the quality and cost are excellent.

  According to the third aspect of the present invention, the tip of the spike can be guided to the center of the partition by making the partition blocking the tip of the bottle concave. As a result, the spike can be pierced without leaving the center of the partition wall, and the bottle can be opened reliably. The formation of the concave surface can be dealt with only by partially changing the shape of the mold, and since the molding process is not different from the conventional one, the manufacturing cost is not affected.

  FIG. 1 is a central sectional view showing a structural example of a liquid container according to the present invention. In this figure, the bottle 11 filled with a liquid W such as a chemical solution and the attached lid 21 are separated from each other, and they are packaged in a state where they are separated even at the actual distribution stage. Mount on the bottle 11. The bottle 11 includes a storage portion 12 for storing the liquid W, and a neck portion 13 formed so as to narrow the upper portion of the storage portion 12, and the storage portion 12 is based on a rectangular cross section without corners. The bottom is flat and can be stably placed on a tabletop. The neck 13 has a cylindrical cross section, and an external thread 16 is formed on the outer peripheral surface near the base, and a cylindrical shape that is narrowed down with a step 17 whose cross-sectional shape changes at a stroke near the tip. The projection 14 protrudes upward, and the tip end face is closed by a partition wall 15. In the neck 13, the narrowed portion 18 whose cross section is locally narrower above the male screw 16 is for design convenience and is not related to the present invention. The whole of the bottle 11 from the storage part 12 to the partition wall 15 that closes the convex part 14 is integrally formed using a soft resin by a method called BFSS (Blow Fill Seal System). In this method, the bottle 11 is formed and the liquid W is injected at the same time. Thereafter, the liquid W can be maintained in a sanitary state without touching the outside air.

  One lid 21 includes a cylindrical body portion 22 surrounding the neck portion 13 of the bottle 11, a top plate 23, a cap 24 that can be freely opened and closed, and the like. A female screw 31 that is screwed into the male screw 16 is formed on the inner peripheral surface of the body portion 22, and the upper end of the body portion 22 is closed by a disk-shaped top plate 23. A funnel-shaped spout 28 is formed at the center of the top surface of the top plate 23, from which the liquid W can be dropped, and a flow path 35 for sending the liquid W to the spout 28 penetrates the top plate 23. is doing. In addition, the cap 24 is used to block the spout 28 and the like, and normally covers the top plate 23, but when used, it is flipped up as shown in the figure. However, in order to prevent the cap 24 from being detached, it is connected to the body portion 22 via a hinge 25. Since the hinge 25 is thin locally, the hinge 25 has sufficient flexibility and holds the cap 24 in a freely rotatable manner.

  Further, an elastic band 26 is formed adjacent to the hinge 25. One end of the elastic band 26 is integrated with the outer peripheral surface of the body portion 22, the other end is integrated near the center of the cap 24, and an intermediate portion thereof is bent in a “<” shape. Therefore, in the middle of opening the cap 24, the elastic band 26 is gradually extended, and thus a reaction force is generated to return to the original state. By this reaction force, the cap 24 does not stop at the intermediate position, and the closed state or the open state is maintained. The cap 24 is also formed with a handle 34 for hooking a finger when opening and closing, an inner plug 32 for closing the flow path 35 in the spout 28, and a claw 33 for fixing in a stationary state.

  A spout 28 is formed on the upper surface of the center of the top plate 23, and a spike 27 protruding like a needle is formed on the bottom surface facing the spout 28. The spike 27 has a sharp pointed tip and is provided with a flow path 35 for sending the liquid W to the spout 28. The liquid W is taken into the flow path 35, so that the spike 27 is near the tip of the spike 27. There is an intake window 29. By inserting the spike 27 into the partition wall 15 at the top of the bottle 11, it is possible to extract the liquid W inside. However, while the cap 24 is closed, the inner plug 32 is inserted into the spout 28, so 35 is blocked and the bottle 11 is sealed again, though not completely.

  The holding member 30 is formed so as to surround the spike 27 concentrically from the bottom surface of the top plate 23, and its cross section is annular and has an inner diameter slightly smaller than the outer peripheral surface of the convex portion 14. The holding member 30 extends downward in the same manner as the spike 27, but the holding member 30 is positioned below the tip of the holding member 30, and the spike 27 is hidden by the holding member 30. Since the partition wall 15 pierced by the spike 27 is formed in a hemispherical shape recessed downward, the spike 27 can be guided to the center.

  The lid 21 including the body portion 22 and the cap 24, the spike 27, and the like are all manufactured in a single molding process using polypropylene resin. For this reason, the hinge 25 that requires flexibility and the spike 27 that requires strength are integrally formed of the same material, and post-processing such as assembly and cutting of a plurality of parts is unnecessary.

  FIG. 2 is a cross-sectional view showing a stage in the middle of attaching the lid 21 to the bottle 11. Both the bottle 11 and the lid 21 are the same as those in FIG. 1, and the tip of the spike 27 contacts the center of the partition wall 15. It is in the state which started. When the lid 21 is attached to the bottle 11, first, the male screw 16 and the female screw 31 come into contact with each other, and thereafter, the operation proceeds while the lid 21 is turned. When the male screw 16 and the female screw 31 are screwed together, the convex portion 14 and the holding member 30 are inevitably arranged concentrically, and the holding member 30 is lowered as the screwing proceeds, and eventually the holding member The 30 end faces begin to contact the outer peripheral surface of the convex portion 14. Since the inner diameter of the holding member 30 is slightly narrower than the outer diameter of the convex portion 14, both are pressed together.

  As the lid 21 continues to pivot, the tip of the spike 27 comes into contact with the center of the hemispherical partition 15 as shown in the figure, and when the lid 21 is further lowered, the partition 15 is centered. When the deformation reaches the limit, a hole is made in the partition wall 15. Although the load in the compression direction acts on the convex portion 14 from when the spike 27 comes into contact with the partition wall 15 until it penetrates, the holding member 30 cannot deform in the horizontal direction, and the hemispherical surface of the partition wall 15 This prevents the spike 27 from leaving the center. As a result, even when the spike 27 is formed of a relatively soft polypropylene resin, the bottle 11 can be opened without being bent.

  FIG. 3 is a cross-sectional view showing the stage where the attachment of the lid 21 has been completed, proceeding from FIG. 2. The spike 27 penetrates the partition wall 15 and is inserted into the bottle 11, and is attached to the tip of the spike 27. The liquid W flows from the entrance window 29 into the flow path 35 and can be dropped from the spout 28.

  4A and 4B show the shape of the lid 21. FIG. 4A is a plan view with the cap 24 open, and FIG. 4B is a bottom view with the cap 24 open. ) Is a central sectional view of the cap 24 in a closed state. The lid 21 has a shape based on a perfect circular cross section, and the cap 24 covering the top plate 23 has a circular dome shape at the bottom. Further, the holding member 30 is formed in an annular shape so as to surround the spike 27, and in addition, two hinges 25 are arranged side by side, and can be freely deformed by reducing the thickness of the central portion. Further, a plate-like elastic band 26 is formed between the two hinges 25, and one end is integrated with the body 22 and the other end is integrated near the center of the cap 24. The elastic band 26 is in the most extended state when the cap 24 is half-opened, and can be maintained in the closed state or the fully-opened state by the reaction force at this time.

  In addition to these, two pairs of claws 33 are formed on the top surface of the top plate 23 and the inner surface of the cap 24, and the cap 24 can be prevented from being inadvertently opened by meshing them. In consideration of convenience when opening the cap 24, a handle 34 is also provided in which a part of the side surface of the cap 24 is extended. In addition, the inner plug 32 closes the flow path 35 when the lid 21 is closed.

  FIG. 5 shows a specific cross-sectional shape example of the convex portion 14 and the spike 27. FIG. 5 (A) is a wedge-shaped spike 27, FIG. 5 (B) is a streamlined spike 27, and FIG. C) is the neck 13 of the bottle 11. The spike 27 needs to be sharply formed to break through the partition wall 15, but its shape is free. Therefore, various shapes such as a wedge shape formed by a combination of straight lines as shown in FIG. 5A and a rounded shape formed by combining curves as shown in FIG. 5B can be selected. However, in any case, the cross-sectional diameter at a point 1.5 mm away from the tip of the spike 27 is set to 1 mm or more and 3 mm or less as in the invention described in claim 2, and the convex portion 14 as shown in FIG. When the diameter is 5 mm or more and 10 mm or less, the spike 27 can be opened in an ideal state without buckling, and the reliability is remarkably improved. As shown in FIG. 5C, when the partition wall 15 has a thickness in the vicinity of the center of 0.8 mm or more and 1.2 mm or less, it can be formed without difficulty and is not broken by internal pressure, and can be easily opened. Ideal configuration.

  FIG. 6 is a perspective view showing examples of shapes of the convex portion 14 and the holding member 30. If the convex part 14 is formed in the front-end | tip part of the bottle 11, there will be no restriction | limiting in the shape, and even if a cross-sectional shape is square like this figure, there is no problem. Further, the holding member 30 fitted into this does not necessarily need to surround the entire outer peripheral surface of the convex portion 14, and if the convex portion 14 can be prevented from bending deformation, a plurality of planar plates are combined as shown in this figure. It may be a structure.

It is a center sectional view showing an example of structure of a liquid storage container by the present invention. It is sectional drawing which shows the step in the middle of attaching a lid | cover to a bottle. FIG. 3 is a cross-sectional view showing a stage where the attachment of the lid is completed, proceeding from FIG. 2. It is a figure which shows the shape of a lid, (A) is a top view in the state where the cap opened, (B) is a bottom view in the state where the cap is opened, (C) is a central sectional view in the state where the cap is closed is there. The example of the specific cross-sectional shape of a convex part and a spike is shown, (A) is a wedge-shaped spike, (B) is a streamline spike, (C) is a neck of a bottle. It is a perspective view which shows the example of a shape of a convex part and a holding member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Bottle 12 Storage part 13 Neck part 14 Convex part 15 Partition 16 Male thread 17 Step part 18 Restriction part 21 Lid 22 Body part 23 Top plate 24 Cap 25 Hinge 26 Elastic band 27 Spike 28 Spout 29 Intake window 30 Holding member 31 Female thread 32 Inner plug 33 Claw 34 Handle 35 Flow path W Liquid

Claims (3)

A resin bottle (11) capable of storing the liquid (W), and a lid (21) attached to the bottle (11) for dropping the liquid (W),
The bottle (11) includes a neck (13), and a cylindrical convex portion (14) is formed at the tip of the neck (13), and the tip surface of the convex (14) is a partition wall (15). Is sealed by
The lid (21) includes a trunk (22) that surrounds the neck (13), a top plate (23) that covers the upper surface of the trunk (22), and a spike for breaking through the partition wall (15) ( 27), a spout (28) for dropping the liquid (W) flowing into the spike (27), an openable / closable cap (24) covering the spout (28), and the cap (24) A hinge (25) for connecting the body (22) to the body (22), and an elastic band (26) for applying a biasing force to the cap (24),
On the back surface of the top plate (23), when the lid (21) is attached to the bottle (11), the spike (27) comes into contact with the partition (15) before the spike (27) contacts the partition (15). ), And the lid (21) is integrally formed of a polypropylene resin. The maximum length of the cross section of the convex part (14) formed on the bottle (11) is 5 mm or more and 10 mm or less, and the thickness of the partition wall (15) is 0.8 mm or more and 1.2 mm or less,
2. The liquid according to claim 1, wherein the spike (27) formed on the lid (21) has a maximum cross-sectional length of 1 mm or more and 3 mm or less at a position advanced 1.5 mm from the tip to the terminal side. Storage container. The liquid container according to claim 1 or 2, wherein the partition wall (15) of the bottle (11) is formed in a concave shape, and the spike (27) can be guided to the center of the partition wall (15) by the concave surface. .

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