JP2021160789A - Container cap and method for manufacturing container cap - Google Patents

Abstract

To provide a container cap that can be opened by a simple operation while ensuring sealability in an unused state, and a method for manufacturing the container cap.SOLUTION: A container cap 1 according to the present invention is a container cap 1 that can be attached to a container body 2 having a storage space S for contents, including: a cap body 10 having a spout 14a for pouring out the contents from the storage space S and attached to a mouth 4 of the container body 2; an openable and closable lid 50 covering the spout 14a; and a plug 15 that connects to a peripheral edge of the spout 14a through a weakening portion 15b and closes the spout 14a, in which a top wall 52 of the lid 50 includes a lid opening 52a, the plug 15 is engaged with the peripheral edge of the lid opening 52a, and a sealing member 60 that seals a gap between the top wall 52 and the plug 15 is adhered to an upper surface of the top wall 52.SELECTED DRAWING: Figure 1

Description

The present invention relates to a container cap that is attached to the mouth of a container body that houses the contents and allows the contents to be poured out, and a method for manufacturing the container cap.

As a container for storing liquids, powders, granules, etc. such as food seasonings, a container having a container body for storing the contents and a container cap having a spout for pouring out the contents is known. ing. For example, Patent Document 1 includes a cap body provided with a spout and an upper lid that can be opened and closed by screw engagement with the cap body, and the spout is for opening a sealing plug and a sealing plug. A cap provided with a pull ring is disclosed.

Japanese Patent No. 6319500

However, in the case of the cap described in Patent Document 1, it is necessary to pull the pull ring to remove the sealing plug after opening the upper lid, which is troublesome and difficult for a weak user to remove the sealing plug. There was room for improvement.

An object of the present invention is to solve such a problem, and an object of the present invention is a container cap that can be opened by a simple operation while ensuring hermeticity in an unused state. , And a method for manufacturing a container cap.

The container cap of the present disclosure is
A container cap that can be attached to the container body that has a storage space for the contents.
A cap body having a spout for pouring out the contents from the storage space and attached to the mouth of the container body, and a cap body.
An openable and closable lid that covers the spout,
A plug body that is connected to the peripheral edge of the spout via a weakening portion and closes the spout is provided.
A lid opening is provided on the top wall of the lid.
The plug is engaged with the peripheral edge of the lid opening,
A sealing member for sealing the gap between the top wall and the plug body is adhered to the upper surface of the top wall.

Further, in the container cap of the present disclosure, in the above configuration, the plug body engages with the closing portion which is connected to the weakened portion and closes the spout, and is erected above the closing portion and engages with the lid opening. It is preferable to have an upright portion.

Further, in the above configuration, it is preferable that the container cap of the present disclosure is provided with a protruding portion extending outward in the radial direction and undercut engaging with the lid opening in the upper part of the standing portion.

Further, in the container cap of the present disclosure, in the above configuration, it is preferable that the side surface and the lower surface of the protruding portion are in liquid-tight contact with the top wall.

Further, in the above-described configuration, the container cap of the present disclosure is provided with an engaging plate connected via a hinge portion on the upper portion of the standing portion, and the engaging plate is formed on the upper surface of the top wall of the lid body. It is preferable to be accommodated in the accommodating recess formed in.

Further, in the container cap of the present disclosure, in the above configuration, the sealing member is preferably a film-like member or a sheet-like member having a melting point higher than that of the lid.

The method for manufacturing the container cap of the present disclosure is as follows.
A method for manufacturing a container cap that can be attached to a container body having a storage space for the contents.
The container cap is
A cap body having a spout for pouring out the contents from the storage space and attached to the mouth of the container body, and a cap body.
An openable and closable lid that covers the spout,
A plug body that is connected to the peripheral edge of the spout via a weakening portion and closes the spout is provided.
A lid opening is provided on the top wall of the lid.
The step of engaging the plug body with the peripheral edge of the lid opening,
The upper surface of the top wall includes a step of adhering a sealing member that seals a gap between the top wall and the plug body.

Further, in the method for manufacturing a container cap of the present disclosure, in the above configuration, the sealing member is preferably a film-like member or a sheet-like member having a melting point higher than that of the lid.

According to the present disclosure, it is possible to provide a container cap that can be opened by a simple operation while ensuring a sealing property in an unused state, and a method for manufacturing the container cap.

It is a front sectional view which shows the container in an unused state which attached the container cap which concerns on 1st Embodiment of this invention to a container body. It is a bottom view of the plug body used for the container cap which concerns on 1st Embodiment of this invention. In the container cap according to the first embodiment of the present invention, it is a front sectional view showing a state in which the stopper body is torn off from the container cap by opening the lid body, and the spout is opened. It is a flowchart which shows the implementation procedure of the manufacturing method of the container cap which concerns on 1st Embodiment of this invention. FIG. 5 is a front sectional view showing a step of thermocompression-bonding a sealing member to a lid body to engage an upright portion of the plug body with the lid body in the container cap according to the first embodiment of the present invention. It is a front sectional view which shows the container in an unused state which attached the container cap which concerns on 2nd Embodiment of this invention to a container body. It is a bottom view of the plug body used for the container cap which concerns on 2nd Embodiment of this invention. In the container cap according to the second embodiment of the present invention, it is a front sectional view showing a state in which the stopper body is torn off from the container cap by opening the lid body, and the spout is opened. It is a flowchart which shows the implementation procedure of the manufacturing method of the container cap which concerns on 2nd Embodiment of this invention. It is a front sectional view which shows the state which the engaging plate is inserted into the lid opening provided in the top wall of a lid in the container cap which concerns on 2nd Embodiment of this invention. It is a front sectional view which shows the state which the engaging plate is housed in the storage recess provided in the top wall of the lid body in the container cap which concerns on 2nd Embodiment of this invention. It is a top view of the top wall part of the lid body in the container cap which concerns on 2nd Embodiment of this invention. FIG. 11 is a cross-sectional view taken along the line AA in FIG. FIG. 5 is a front sectional view showing a step of thermocompression bonding a sealing member to a lid body to engage an upright portion of the plug body with the lid body in the container cap according to the second embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

FIG. 1 shows a state in which the container cap 1 according to the first embodiment of the present invention is attached to a container body 2 suitable for the container cap 1. In the present specification, claims, abstract and drawings, the side where the lid 50, which will be described later, is located is the upper side (upper side in FIG. 1), and the side where the container body 2 is located is the lower side (lower side in FIG. 1). Side). Further, the radial outer side is a direction that passes through the central axis O1 of the container cap 1 in FIG. 1 and faces a side opposite to the central axis O1 along a straight line perpendicular to the central axis O1. It shall mean the direction toward the central axis O1 along the straight line. The container cap 1 according to the present embodiment includes a cap body 10 and a lid 50.

First, the container body 2 will be described. The container body 2 used in the present embodiment includes a tubular mouth portion 4, a body portion (not shown) connected to the lower end portion of the mouth portion 4, and a bottom portion that closes the lower end portion of the body portion. In the present embodiment, the container body 2 is formed by performing extrusion blow molding on a parison formed of a synthetic resin material. As the material constituting the container body 2, low-density polyethylene (LDPE), high-density polyethylene resin (HDPE), or the like is used, and particularly when LDPE is used, high squeeze property can be imparted. However, the present invention is not limited to this mode, and when the container body 2 is formed by, for example, biaxial stretching blow molding, polyethylene terephthalate (PET) or the like may be used as the material constituting the container body 2.

As shown in FIG. 1, the container body 2 is provided with a storage space S for accommodating the contents inside the container body 2.

As shown in FIG. 1, on the outer peripheral surface of the mouth portion 4, an annular convex portion 4a for undercut engagement with an engaging protrusion wall 11a provided on the outer peripheral wall 11 of the cap body 10 described later is provided. Further, a seal wall 16 provided on the cap body 10 described later is fitted on the inner peripheral surface of the mouth portion 4. In this way, in the container body 2, the cap body 10 is engaged by the mouth portion 4 being sandwiched between the outer peripheral wall 11 and the seal wall 16 and the annular convex portion 4a being undercut engaged with the engaging protrusion wall 11a. Can be firmly fixed.

Next, the cap body 10 constituting the container cap 1 will be described. The cap body 10 includes an outer peripheral wall 11 that surrounds the mouth portion 4, and an engaging protrusion wall 11a that undercuts and engages with the annular convex portion 4a of the mouth portion 4 is formed on the inner peripheral surface of the outer peripheral wall 11. ing. Further, the top wall 13 is integrally connected to the upper part of the outer peripheral wall 11. On the upper surface of the top wall 13, a pouring cylinder 14 for defining a pouring outlet 14a for pouring out the contents is provided. An engaging ring 13b and an engaging protrusion 13a are provided at the outer peripheral end of the top wall 13, and when the lid 50 is closed, the lid protrusion 57 provided on the inner peripheral surface of the lid peripheral wall 53 of the lid 50 engages. The lid body 50 is fixed to the cap body 10 by undercut engagement with the protrusion 13a. At the lower end of the engaging ring 13b, a seal protrusion 13c that abuts on the upper end of the mouth 4 and seals between the mouth 4 and the cap body 10 in a liquid-tight manner projects downward. As shown in FIG. 1, the outer peripheral wall 11 is integrally connected to the lid 50 via the hinge portion 40. The hinge portion 40 has a lid 50, which will be described later, joined to the cap body 10 so as to be openable and closable.

In the present embodiment, the inner cylinder 54 provided on the lower surface of the top wall 52 of the lid 50, which will be described later, comes into contact with the inner peripheral surface of the injection cylinder 14, so that the spout 14a is liquid when the lid 50 is closed. It is tightly sealed.

On the inner peripheral surface of the injection cylinder 14, a plug 15 that closes the injection outlet 14a is connected via a weakening portion 15b. In the unused state of the container in which the weakened portion 15b is not broken as shown in FIG. 1, the plug 15 closes the spout 14a. Then, by confirming whether or not the weakened portion 15b is broken, it is possible to determine whether or not the container to which the container cap 1 is attached is unopened. That is, in the present embodiment, the weakened portion 15b has an unopened guarantee function. The weakened portion 15b has a cross-sectional area that can be broken by applying a predetermined force when the user opens the lid 50 of the container in an unused state.

As shown in FIGS. 1 and 2, the plug body 15 is connected to the weakened portion 15b, has a flat plate-shaped closed portion 15f that closes the spout 14a, and an upright portion that is erected upward from the closed portion 15f. It has 15c. The upright portion 15c has a substantially ridged cylindrical shape, and is provided with a projecting portion 15a projecting outward in the radial direction at the upper portion. The plug 15 is firmly fixed to the lid 50 by undercutting the protruding portion 15a with the annular protrusion 52c on the peripheral edge of the lid opening 52a on the lid 50 side, which will be described later.

Further, a tension rib 15e extending in the vertical direction is provided on the side portion of the vertical portion 15c on the hinge portion 40 side. The tension rib 15e is upward when the plug 15 is lifted together with the lid 50 when the lid 50 is lifted and opened from the unused state of the container in which the weakened portion 15b is not broken, as shown in FIG. It plays a role of transmitting the tensile force to the weakened portion 15b on the hinge portion 40 side. Further, by providing the tension rib 15e on the side portion (hinge portion 40 side) of the upright portion 15c, when the lid body 50 is opened, stress is concentrated in the vicinity of the weakening portion 15b that has begun to break, so that the weakening portion 15b Is easy to break. With this tension rib 15e, when the lid body 50 is lifted from the state shown in FIG. 1, the weakened portion 15b on the hinge portion 40 side can be easily cut.

As shown in FIG. 1, the lid 50 is connected to the upper end of the outer peripheral wall 11 of the cap body 10 via a hinge portion 40, and the pouring cylinder 14 is covered by bending the hinge portion 40. be able to. Further, a lid projection 57 is provided on the inner surface of the peripheral wall of the lid 50 (the peripheral wall 53 of the lid). When the lid body 50 is closed, the lid body protrusion 57 undercuts and engages with the engagement protrusion 13a of the engagement ring 13b, and the lid body 50 is fixed to the cap body 10.

A lid opening 52a penetrating the top wall 52 is provided at a position (horizontal direction) of the lid 50 corresponding to the upright portion 15c. A protruding portion 15a projecting radially outward from the upper portion of the standing portion 15c is undercut engaged and fixed to the annular protrusion 52c formed on the peripheral edge of the lid opening 52a. As shown in FIG. 1, the engagement between the annular protrusion 52c and the protrusion 15a is an engagement in which the contact surfaces of the annular protrusions 52c form a substantially horizontal plane, and a plug body engagement jig 70 (see FIG. 5) described later is used. After forming the plug 15 so that the two engage with each other, the engagement is strong and cannot be released. More specifically, the engagement between the annular protrusion 52c and the protrusion 15a cannot be released unless the standing portion 15c is pressed with a pressing force larger than the tensile force required to break the weakened portion 15b. Has been done.

In the present embodiment, the lower surface of the protruding portion 15a abuts on the upper surface of the annular protrusion 52c of the top wall 52, and the side surface of the protruding portion 15a abuts on the inner peripheral surface of the lid opening 52a erected from the annular protrusion 52c. Get in touch. Further, the side surface of the reduced diameter portion 15h above the standing portion 15c is in contact with the inner peripheral surface of the annular protrusion 52c of the lid opening 52a. With such a configuration, even after the weakened portion 15b connecting the plug body 15 and the pouring cylinder 14 is broken, the top wall 52 and the standing portion 15c are liquidtightly sealed on three surfaces. , It is possible to effectively prevent the contents from leaking to the outside of the pouring cylinder 14.

As the material of the container cap 1 and the lid 50, for example, linear low density polyethylene (LLDPE) can be used. However, the present invention is not limited to this aspect, and the material of the container cap 1 and the lid 50 may be other polyethylene (PE) such as low density polyethylene (LDPE), medium density polyethylene (MDPE), and high density polyethylene (HDPE). ), Polypropylene (PP) (random PP, block PP, homo PP) and other synthetic resin materials can be used.

As shown in FIG. 1 and the like, a film-shaped sealing member 60 is adhered to the upper surface of the top wall 52 of the lid 50. In the present embodiment, the seal member 60 is adhesively fixed to the entire region except the edge portion on the upper surface of the top wall 52 of the lid 50. The seal member 60 seals the gap between the top wall 52 and the upper wall portion 15g2 of the upright portion 15c of the plug body 15. With such a configuration, the container cap 1 can effectively suppress leakage of the contents from the lid opening 52a when the lid 50 is closed. The seal member 60 is not limited to the above configuration, and may be a sheet-like member having a thickness larger than that of the film-like seal member 60.

In this embodiment, polyethylene terephthalate (PET) is used as the material of the sealing member 60. As described above, in the present embodiment, each synthetic resin is selected so that the melting point of the sealing member 60 (PET) is higher than the melting point of the lid 50 (LLDPE) and the plug 15. Therefore, at the time of manufacturing the container cap 1, when the upper jig 71 (heating plate) is pressed from above to heat-weld the seal member 60 to the lid 50 and the stopper 15 (see FIG. 5). The temperature of the upper jig 71 can be adjusted so that the seal member 60 does not melt and only the top wall 52 of the lid 50 and the standing portion 15c of the plug 15 melt. Therefore, the seal member 60 can be heat-welded to the top wall 52 of the lid 50 and the upright portion 15c of the plug 15 without the seal member 60 sticking to the upper jig 71.

When using the contents in the container body 2 for the first time, the user rotates the lid 50 clockwise around the hinge 40 while pinching the knob 51 of the lid 50 with a finger from the state shown in FIG. And open it. At this time, since the plug body 15 is already firmly engaged and fixed to the lid body 50, the user opens the lid body 50 with a force equal to or higher than a predetermined force to connect the plug body 15 and the pouring cylinder 14. The weakened portion 15b is cut, and as shown in FIG. 3, the plug body 15 is separated from the pouring cylinder 14 in a state of being integrated with the lid body 50. As a result, the spout 14a is opened so that the user can use the contents. Therefore, it is possible to open the cap by a simple operation of picking and pulling up the lid 50 while ensuring the sealing property by the plug 15 in the unused state. It can be said that the operation of pulling up the lid 50 is easier for the user to operate than the operation of pulling the pull ring to open the lid with less load on the fingers.

Further, the user can recognize that the container has been opened by visually recognizing that the weakened portion 15b having the unopened guarantee function is broken as shown in FIG.

Next, a procedure for manufacturing the unused container cap 1 shown in FIG. 1 by engaging the protruding portion 15a of the plug body 15 with the annular protrusion 52c of the lid body 50 will be described with reference to FIGS. 4 and 5. do.

First, as shown in FIG. 5, the manufacturer prepares the container cap 1 in the initial state before engaging the stopper body 15 with the lid 50, which is formed by injection molding or the like (step S101 in FIG. 4). ). In the container cap 1 in the initial state, the protruding portion 15a is not yet formed in the standing portion 15c, and the upper end portion of the standing portion 15c is formed with an upper wall having a substantially truncated cone shape as shown in FIG. The material is 15 g1. As shown in FIG. 5, the lid 50 is moved to a position where it covers the spout 14a by folding back the hinge portion 40, and the upper portion of the upper wall forming material 15g1 penetrates the lid opening 52a and protrudes upward. After that, the container cap 1 is set on the plug body engaging jig 70 shown in FIG. 5 (step S102 in FIG. 4).

In a state where the closing portion 15f of the plug body 15 is supported by the lower jig 73 of the plug body engaging jig 70, the sealing member 60 and the standing portion are supported by the upper jig 71 (heating plate) of the plug body engaging jig 70 shown in FIG. The upper wall forming material 15g1 of the jig 15c is heated while being pressed from above. In the present embodiment, the lower surface temperature of the upper jig 71 is maintained, for example, between 100 ° C. and 150 ° C. so as not to melt the upper surface of the upright portion 15c of the lid body 50 and the plug body 15 and not to melt the seal member 60. There is. In particular, the lower surface temperature of the upper jig 71 is most preferably maintained at about 120 ° C. As a result, the upper wall forming material 15g1 heated by the upper jig 71 via the sealing member 60 is melted by the heat from the upper jig 71 and spread outward in the radial direction. Then, it is deformed until it becomes substantially the same height as the upper surface of the top wall 52 of the lid 50, and becomes the upper wall portion 15g2 shown in FIG. Further, the side portion of the upper wall forming material 15g1 is formed as a protruding portion 15a above the annular protrusion 52c. At this time, a part of the protruding portion 15a is formed into a shape having a recess into which the protruding portion 52c1 provided at one position in the circumferential direction of the annular protrusion 52c is fitted. As a result, the protruding portion 15a of the standing portion 15c undercuts and engages with the annular protrusion 52c of the peripheral edge portion of the lid opening 52a, and the plug 15 cannot pass through the lid opening 52a downward.

Since the upper surface of the top wall 52 and the upper surface of the upper wall portion 15g2 of the upright portion 15c are melted by the heat from the upper jig 71, the sealing member 60 is placed on the upright portion 15c of the top wall 52 and the plug body 15. Is heat-welded to (step S103 in FIG. 4). On the other hand, since the seal member 60 itself is not melted, the seal member 60 does not stick to the upper jig 71. Therefore, it is possible to engage the plug 15 and the lid 50 and heat-weld the seal member 60 to the plug 15 and the lid 50 without causing manufacturing defects such as poor adhesion of the seal member 60. You can.

In the present embodiment, as described above, the sealing member 60 and the like are heated by the upper jig 71 (heating plate), and at the same time, the protruding portion 15a formed on the plug body 15 undercuts and engages with the annular protrusion 52c. The seal member 60 is configured to be heat-welded onto the top wall 52 and the upright portion 15c of the plug body 15, but the present invention is not limited to this aspect. The step of engaging the plug 15 and the lid 50 and the step of heat welding the seal member 60 onto the top wall 52 and the upright portion 15c of the plug 15 may be separate steps. In this case, it is preferable to heat-weld the seal member 60 after engaging the stopper 15 and the lid 50, but the order may be reversed.

After the plug body 15 is thermoformed and fixed to the lid body 50 by the plug body engaging jig 70 shown in FIG. 5, the cap body 10 is attached to the mouth 4 of the container body 2 filled with the contents. This completes the unused container shown in FIG.

As described above, the present embodiment is a container cap 1 that can be attached to the container body 2 having the storage space S for the contents, and has a spout 14a for pouring out the contents from the storage space S. Then, the cap body 10 attached to the mouth 4 of the container body 2, the openable and closable lid 50 covering the spout 14a, and the peripheral edge of the spout 14a are connected to each other via the weakened portion 15b to block the spout 14a. The top wall 52 of the lid 50 is provided with a lid opening 52a, and the plug 15 is engaged with the peripheral edge of the lid opening 52a, and the top surface of the top wall 52 , The sealing member 60 that seals the gap between the top wall 52 and the plug 15 is configured to be adhered. By adopting such a configuration, in the unused container cap 1, the stopper body 15 which is connected to the injection cylinder 14 via the weakening portion 15b and closes the injection port 14a is fixed to the lid body 50, and the lid body is fixed. By picking the 50 and turning it around the hinge portion 40, the plug 15 can be moved together with the lid 50 to easily open the spout 14a. Therefore, it is possible to open the cap by a simple operation of picking and pulling up the lid 50 while ensuring the sealing property by the plug 15 in the unused state. Then, the user can recognize that the container cap 1 is not unused from the state where the weakened portion 15b is broken. Therefore, it is possible to provide the container cap 1 with an unopened guarantee function with a simple configuration. In particular, in the present embodiment, since the seal member 60 for sealing the gap between the top wall 52 and the plug body 15 is adhered to the upper surface of the top wall 52, the plug body 15 and the pouring cylinder 14 are connected. Even after the weakened portion 15b is broken, the top wall 52 of the lid 50 can be liquid-tightly sealed by the sealing member 60 to effectively prevent the contents from leaking when the lid 50 is closed. can.

Further, in the present embodiment, the plug body 15 includes a closing portion 15f that is connected to the weakened portion 15b and closes the spout 14a, and a standing portion 15c that is erected above the closing portion 15f and engages with the lid opening 52a. Was configured to have. By adopting such a configuration, the height position of the weakened portion 15b can be arranged at the lower part of the dispensing cylinder 14 by the height of the standing portion 15c, so that the contents are dispensed from the dispensing cylinder 14. The flow can be stabilized.

Further, in the present embodiment, a protruding portion 15a extending outward in the radial direction and undercut-engaging with the lid opening 52a is provided on the upper portion of the standing portion 15c. By adopting such a configuration, the standing portion 15c of the plug body 15 can be firmly engaged with the top wall 52 of the lid body 50, and the sealing property between the plug body 15 and the lid body 50 can be improved. can.

Further, in the present embodiment, the side surface and the lower surface of the protruding portion 15a are configured to be in liquidtight contact with the top wall 52. By adopting such a configuration, the gap between the plug body 15 and the lid body 50 can be liquid-tightly sealed by at least two contact surfaces, so that the weakened portion connecting the plug body 15 and the pouring cylinder 14 is connected. Even after the 15b is broken, the top wall 52 of the lid 50 can be liquid-tightly sealed, and the leakage of the contents can be effectively suppressed when the lid 50 is closed. Further, when the container body 2 is filled with the contents at a high temperature, the contents are cooled by shower water or the like, but when the container cap 1 according to the present embodiment is attached to the container body 2, the shower water or the like is capped from the outside. It is possible to suppress the invasion inside.

Further, the present embodiment is a method for manufacturing a container cap 1 that can be attached to a container body 2 having a storage space S for contents, and the container cap 1 dispenses contents from the storage space S. A cap body 10 having a spout 14a and attached to the mouth 4 of the container body 2, an openable / closable lid 50 covering the spout 14a, and a peripheral portion of the spout 14a are connected via a weakening portion 15b. A plug body 15 for closing the spout 14a is provided, and a lid body opening 52a is provided on the top wall 52 of the lid body 50. A step of engaging the plug body 15 with the peripheral edge of the lid body opening 52a and a top wall. The upper surface of the 52 is configured to include a step of adhering a sealing member 60 for sealing the gap between the top wall 52 and the plug 15. By adopting such a configuration, in the unused container cap 1, the stopper body 15 which is connected to the injection cylinder 14 via the weakening portion 15b and closes the injection port 14a is fixed to the lid body 50, and the lid body is fixed. By picking the 50 and turning it around the hinge portion 40, the plug 15 can be moved together with the lid 50 to easily open the spout 14a. Therefore, it is possible to open the cap by a simple operation of picking and pulling up the lid 50 while ensuring the sealing property by the plug 15 in the unused state. Then, the user can recognize that the container cap 1 is not unused from the state where the weakened portion 15b is broken. Therefore, it is possible to provide the container cap 1 with an unopened guarantee function with a simple configuration. In particular, in the present embodiment, since the seal member 60 for sealing the gap between the top wall 52 and the plug body 15 is adhered to the upper surface of the top wall 52, the plug body 15 and the pouring cylinder 14 are connected. Even after the weakened portion 15b is broken, the top wall 52 of the lid 50 can be liquid-tightly sealed by the sealing member 60 to effectively prevent the contents from leaking when the lid 50 is closed. can.

Further, in the present embodiment, the seal member 60 is configured to be a film-like member or a sheet-like member having a melting point higher than that of the lid 50. By adopting such a configuration, when the plug 15 is engaged with the lid 50 by heat welding and the seal member 60 is heat welded to the top wall 52 of the lid 50, the seal member 60 itself does not melt, so that the seal is sealed. The member 60 does not stick to the upper jig 71 (heating plate). Therefore, it is possible to engage the plug 15 and the lid 50 and heat-weld the seal member 60 to the lid 50 without causing manufacturing defects such as poor adhesion of the seal member 60.

Next, the container cap 101 according to the second embodiment of the present invention will be specifically described with reference to FIGS. 6 to 14. The container cap 101 according to the present embodiment has a configuration of the upright portion 15c of the plug body 15 and a configuration of the top wall 52 of the lid 50 with which the upright portion 15c is engaged, as compared with the first embodiment. Is similar to the first embodiment except that. Therefore, here, the differences from the first embodiment will be mainly described. Further, the parts having the same functions as those of the first embodiment will be described with the same reference numerals.

FIG. 6 shows a state in which the container cap 101 according to the second embodiment of the present invention is attached to a container body 2 compatible with the cap 101. The container cap 101 according to the present embodiment includes a cap body 10 and a lid body 50.

The cap body 10 constituting the container cap 101 will be described with reference to FIGS. 6 and 7.

On the inner peripheral surface of the injection cylinder 14, a plug 15 that closes the injection outlet 14a is connected via a weakening portion 15b. In the unused state of the container in which the weakened portion 15b is not broken as shown in FIG. 6, the plug 15 closes the spout 14a. Then, by confirming whether or not the weakened portion 15b is broken, it is possible to determine whether or not the container to which the container cap 101 is attached is unopened. That is, in the present embodiment, the weakened portion 15b has an unopened guarantee function. The weakened portion 15b has a cross-sectional area that can be broken by applying a predetermined force when the user opens the lid 50 of the container in an unused state.

As shown in FIGS. 6 and 7, the plug 15 is connected to the weakened portion 15b, has a flat plate-shaped closing portion 15f that closes the spout 14a, and an upright portion that is erected upward from the closing portion 15f. It has 15c. The upright portion 15c has a substantially climaxed cylindrical shape, and includes an engaging plate 115a connected to a protruding portion 115d protruding upward from the upper wall portion 115g via a hinge portion 115b. As shown in FIG. 12, the engaging plate 115a has a substantially rectangular shape extending in the radial direction. The plug 15 is engaged and fixed to the lid 50 by accommodating the engaging plate 115a in the accommodating recess 152d provided on the upper surface of the top wall 52 of the lid 50, which will be described later.

A lid opening 52a penetrating the top wall 52 is provided at a position (horizontal direction) of the lid 50 corresponding to the upright portion 15c. The engaging plate 115a described above is housed in a housing recess 152d provided on the upper surface of the top wall 52 and connected to the lid opening 52a. A claw portion 115a1 projecting laterally is provided at the lower portion of the engaging plate 115a (see FIG. 13), and the claw portion 115a1 is undercut engaged with an engaging protrusion 152d1 provided on the side surface of the accommodating recess 152d. By doing so, the engaging plate 115a is engaged and fixed in the accommodating recess 152d.

In the present embodiment, the upper surface of the upper wall portion 115g of the standing portion 15c abuts on the lower surface of the top wall 52, and the side surface of the standing portion 15c is the inner circumference of the tubular portion 152c provided below the lid opening 52a. The lid opening 52a is liquid-tightly sealed by fitting to the surface. With such a configuration, even after the weakened portion 15b connecting the plug body 15 and the pouring cylinder 14 is broken, the top wall 52 and the standing portion 15c are liquidtightly sealed on two surfaces. , It is possible to effectively prevent the contents from leaking to the outside of the pouring cylinder 14.

As shown in FIG. 1 and the like, a film-shaped sealing member 60 is adhered to the upper surface of the top wall 52 of the lid 50. In the present embodiment, the seal member 60 is adhesively fixed to the entire region except the edge portion on the upper surface of the top wall 52 of the lid 50. The seal member 60 seals the gap between the top wall 52 and the engaging plate 115a connected to the upright portion 15c of the plug 15 via the hinge portion 115b. With such a configuration, the container cap 1 can more effectively suppress the leakage of the contents from the lid opening 52a when the lid 50 is closed. Also in this embodiment, the seal member 60 is not limited to the above configuration, and may be a sheet-like member having a thickness larger than that of the film-like seal member 60.

Also in this embodiment, polyethylene terephthalate (PET) is used as the material of the sealing member 60. As described above, in the present embodiment, each synthetic resin is selected so that the melting point of the sealing member 60 (PET) is higher than the melting point of the lid 50 and the plug 15 (LLDPE). Therefore, at the time of manufacturing the container cap 101, when the upper jig 171 (heating plate) is pressed from above to heat-weld the seal member 60 to the lid 50 and the stopper 15 (see FIG. 14), as will be described later. The temperature of the upper jig 171 can be adjusted so that the seal member 60 does not melt and only the top wall 52 of the lid 50 and the engaging plate 115a of the plug 15 melt. Therefore, the seal member 60 can be heat-welded to the top wall 52 of the lid 50 and the engaging plate 115a of the plug 15 without sticking the seal member 60 to the upper jig 171.

When using the contents in the container body 2 for the first time, the user rotates the lid 50 clockwise around the hinge 40 while pinching the knob 51 of the lid 50 with a finger from the state shown in FIG. And open it. At this time, since the plug body 15 is already firmly engaged and fixed to the lid body 50, the user opens the lid body 50 with a force equal to or higher than a predetermined force to connect the plug body 15 and the pouring cylinder 14. The weakened portion 15b is cut, and as shown in FIG. 8, the plug body 15 is separated from the pouring cylinder 14 in a state of being integrated with the lid body 50. As a result, the spout 14a is opened so that the user can use the contents. Therefore, it is possible to open the cap by a simple operation of picking and pulling up the lid 50 while ensuring the sealing property by the plug 15 in the unused state.

Further, the user can recognize that the container has been opened by visually recognizing that the weakened portion 15b having the unopened guarantee function is broken as shown in FIG.

Next, a procedure for manufacturing the unused container cap 101 shown in FIG. 6 by engaging and fixing the engaging plate 115a of the plug body 15 to the accommodating recess 152d of the lid body 50 will be described with reference to FIGS. 9 to 14. do.

First, the manufacturer prepares the container cap 101 in the initial state before engaging the stopper body 15 with the lid 50, which is formed by injection molding or the like (step S201 in FIG. 9). In the container cap 101 in the initial state, the engaging plate 115a connected to the upright portion 15c has not yet been inserted into the lid opening 52a, and the lid 50 and the plug 15 are not engaged. As shown in FIG. 10, the lid 50 is moved to a position where it covers the spout 14a by folding back the hinge portion 40, and the engaging plate 115a connected to the standing portion 15c is positioned below the lid opening 52a ( Step S202 of FIG. 9).

As shown in FIG. 11, a state in which the closing portion 15f of the plug body 15 is supported by the lower jig 173 of the plug body engaging jig 170, and the engaging plate 115a connected to the standing portion 15c has passed through the lid opening 52a. Closes the lid body 50 (step S203 in FIG. 9). Then, the engaging plate 115a is rotated clockwise (in the direction of the arrow in FIG. 11) around the hinge portion 115b and accommodated in the accommodating recess 152d, whereby the engaging plate 115a is accommodated in the peripheral edge of the lid opening 52a in the top wall 52. Engage with the portion (step S204 of FIG. 9). As described above, when the engaging plate 115a is accommodated in the accommodating recess 152d, the claw portion 115a1 provided at the lower part of the engaging plate 115a is undercut into the engaging protrusion 152d1 provided on the side surface of the accommodating recess 152d. By engaging, the engaging plate 115a is engaged and fixed in the accommodating recess 152d.

Next, the engagement plate 115a connected to the seal member 60, the top wall 52, and the upright portion 15c is heated from above by the upper jig 171 (heating plate) of the plug body engagement jig 170 shown in FIG. In the present embodiment, the lower surface temperature of the upper jig 171 is maintained, for example, between 100 ° C. and 150 ° C. so as not to melt the engagement plate 115a of the top wall 52 of the lid body 50 and the plug body 15 and not to melt the seal member 60. ing. In particular, the lower surface temperature of the upper jig 171 is most preferably maintained at about 120 ° C. As a result, the upper surface of the top wall 52 and the engaging plate 115a heated by the upper jig 171 via the seal member 60 is melted by the heat from the upper jig 171 and is heat-welded to the seal member 60 (step S205 in FIG. 9). ).

On the other hand, since the seal member 60 itself is not melted, the seal member 60 does not stick to the upper jig 171. Therefore, it is possible to engage the plug 15 and the lid 50 and heat-weld the seal member 60 to the lid 50 without causing manufacturing defects such as poor adhesion of the seal member 60.

In this way, after engaging and fixing the plug body 15 to the lid body 50 by the plug body engaging jig 170 shown in FIG. 14, the cap body 10 is attached to the mouth 4 of the container body 2 filled with the contents. This completes the unused container shown in FIG.

As described above, in the present embodiment, the engaging plate 115a connected via the hinge portion 115b is provided on the upper portion of the upright portion 15c, and the engaging plate 115a is placed on the upper surface of the top wall 52 of the lid 50. It was configured to be accommodated in the formed accommodating recess 152d. By adopting such a configuration, the top wall 52 of the lid 50 and the engaging plate 115a of the plug 15 can be engaged and fixed without being thermally deformed, so that the lid can be engaged and fixed as compared with the first embodiment. The engagement and fixing of the body 50 and the plug body 15 and the adhesion of the seal member 60 can be easily performed.

Although the present disclosure has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and modifications based on the present disclosure. Therefore, it should be noted that these modifications and modifications are included in the scope of the present invention. For example, the functions included in each component can be rearranged so as not to be logically inconsistent, and a plurality of components can be combined or divided into one. It should be understood that these are also included in the scope of the present invention.

For example, in the first and second embodiments, the lid body 50 is connected to the cap body 10 by the hinge portion 40, and the lid body 50 is configured to be undercut engaged with the cap body 10, but the embodiment is limited to this aspect. Not done. The lid body 50 may be configured to be attached to the cap body 10 by, for example, screw engagement. In this case, it is preferable that the central axis of the spout 14a and the plug 15 and the central axis of the engaging screw substantially coincide with each other.

Further, in the first embodiment, the protruding portion 15a provided on the plug 15 is configured to undercut and engage with the annular protrusion 52c provided on the peripheral edge of the lid opening 52a, but the present invention is not limited to this embodiment. .. For example, the protruding portion 15a of the plug body 15 may be configured to directly undercut and engage with the peripheral edge portion of the lid opening 52a without providing the annular protrusion 52c.

Further, in the first embodiment, the protruding portion 15a integrally formed on the upper portion of the standing portion 15c is configured to undercut and engage with the peripheral edge portion of the lid opening 52a, but the present invention is not limited to this embodiment. The protruding portion 15a may be a separate member connected to the standing portion 15c.

1,101 Container cap 2 Container body 4 Mouth part 4a Circular convex part 10 Cap body 11 Outer wall 11a Engagement protrusion 13 Top wall 13a Engagement protrusion 13b Engagement ring 13c Seal protrusion 14 Injection cylinder 14a Outlet 15 plug Body 15a Protruding part 15b Weakened part 15c Standing part 15e Rib 15f Closure part 15g1 Upper wall forming material 15g2 Upper wall part 15h Reduced diameter part 16 Seal wall 40 Hinge part 50 Lid body 51 Grip part 52 Top wall 52a Lid body opening 52c Protrusion 52c1 Protrusion 53 Cover peripheral wall 54 Inner cylinder 57 Closure protrusion 60 Sealing member 70,170 Plug engagement jig 71,171 Upper jig 73,173 Lower jig 115a Engagement plate 115a1 Claw 115b Hinge 115d Protrusion 115g Upper wall part 152c Cylinder part 152d Storage recess 152d1 Engagement protrusion O1 Central axis S Storage space

Claims (8)

A container cap that can be attached to the container body that has a storage space for the contents.
A cap body having a spout for pouring out the contents from the storage space and attached to the mouth of the container body, and a cap body.
An openable and closable lid that covers the spout,
A plug body that is connected to the peripheral edge of the spout via a weakening portion and closes the spout is provided.
A lid opening is provided on the top wall of the lid.
The plug is engaged with the peripheral edge of the lid opening,
A container cap characterized in that a sealing member for sealing a gap between the top wall and the plug body is adhered to the upper surface of the top wall. The plug according to claim 1, wherein the plug has a closed portion that is connected to the weakened portion and closes the spout, and a standing portion that is erected above the closed portion and engages with the lid opening. Container cap. The container cap according to claim 2, wherein a protruding portion that extends radially outward and engages with the lid opening undercut is provided on the upper portion of the standing portion. The container cap according to claim 3, wherein the side surface and the lower surface of the protruding portion are in liquidtight contact with the top wall. 2. Cap for container described in. The container cap according to any one of claims 1 to 5, wherein the sealing member is a film-shaped member or a sheet-shaped member having a melting point higher than that of the lid. A method for manufacturing a container cap that can be attached to a container body having a storage space for the contents.
The container cap is
A cap body having a spout for pouring out the contents from the storage space and attached to the mouth of the container body, and a cap body.
An openable and closable lid that covers the spout,
A plug body that is connected to the peripheral edge of the spout via a weakening portion and closes the spout is provided.
A lid opening is provided on the top wall of the lid.
The step of engaging the plug body with the peripheral edge of the lid opening,
A method for manufacturing a container cap, which comprises a step of adhering a sealing member for sealing a gap between the top wall and the plug body on the upper surface of the top wall. The method for manufacturing a container cap according to claim 7, wherein the sealing member is a film-shaped member or a sheet-shaped member having a melting point higher than that of the lid.

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