JP7202848B2 - Sealing member and container - Google Patents

Description

The present invention relates to seals and containers.

Containers that contain liquid contents (e.g. mayonnaise, ketchup, etc.) or granular or powdery contents (e.g., pepper, salt, sesame, etc.) and can be ejected from the ejection port as needed should be used for storage. In order to suppress the deterioration of the contents over time, the discharge port is sealed with a sealing member with high gas barrier properties. When using the contents in the container for the first time, the user peels off the sealing member to expose the discharge port, thereby enabling the contents to be discharged from the discharge port.

More specifically, as shown in Patent Documents 1 to 3, it is directly applied to the open end of a bottle or tube-shaped container body that is open at one end, or via a resin sheet provided with a discharge port. A thin sealing member that indirectly closes the opening is attached, and a cap is attached. Normally, a male threaded portion is formed on the outer periphery of the open end of the container body, and a female threaded portion is formed on the inner periphery of the cap, and the cap is screwed onto the open end of the container body. Therefore, before the user uses the contents in the container for the first time, the cap is attached so as to surround the sealing member with the sealing member attached to the open end of the container body. . The user removes the cap and then peels off the sealing member to expose the opening and allow the contents to be discharged from the opening. When a resin sheet having a discharge port is provided, the resin sheet remains adhered to the opening end without being peeled off.

The cap may have a double structure having an inner plate portion positioned above the open end and a main body portion that can be opened and closed with respect to the inner plate portion. In that case, the inner plate portion is provided with the nozzle portion, and the nozzle portion faces the opening. Therefore, the contents can be discharged from the container body to the outside through the nozzle part in a state in which the main body part of the cap is opened.

JP-A-2004-83086 JP-A-2004-99128 JP-A-2004-123191

Usually, the sealing member has a sealing portion that is detachably attached to a position that closes the opening of the container body, and a knob portion that extends from a part of the sealing portion. When peeling off the sealing member to expose the opening, the user grasps the knob and pulls it away from the open end of the container body. The knob portion is bent downward from the outer periphery of the open end of the container body, that is, toward the side of the surface to be attached to the open end (the side of the content-accommodating portion), and extends along the side surface of the container body. , is generally housed inside the cap. In such a configuration, if the knob enters between the male threaded portion of the open end and the female threaded portion of the cap inside the cap, there is a possibility that they will be hindered from being screwed together. In order to prevent this, if the knob portion is bent toward the male thread portion, the knob portion will be deformed along the thread crest and thread root, making it difficult for the user to grip the knob portion. Also, when applying high-frequency vibration or heat to affix the sealing material, if the knob is in contact with the male or female thread, the knob may stick to the male or female thread. have a nature. As a result, it becomes difficult to grasp the knob, or the knob interferes with removal of the cap. To avoid such problems, a too large knob cannot be provided. On the other hand, if a small knob is provided, it is difficult for the user to grip the knob, and the operability of peeling off the sealing member is poor. In addition, when high-frequency vibration and heat are applied when the sealing member is attached, the vibration and heat are concentrated on the knob portion, which is a protrusion, and its vicinity, causing the inside of the sealing portion to degrade from the vicinity of and from the knob portion. Temperature variations can occur between distant locations. As a result, the adhesive strength of the sealing member becomes uneven, and the reliability of the sealing becomes low.

Patent Literatures 2 and 3 disclose a configuration in which the knob portion of the sealing member is folded back onto the sealing portion instead of extending toward the surface to which the sealing member is attached to the open end. In the configuration described in Patent Document 2, since the knob portion is provided with approximately the same area as the sealing portion, a large amount of material is required, leading to an increase in cost. Further, in both of the configurations of Patent Documents 2 and 3, the knob portion folded back on the sealing portion is held in a state of being substantially pressed against the inner surface of the cap. According to the drawings of Patent Documents 2 and 3, it is expected that when the cap is removed, the grip portion floats above the sealing portion due to the rigidity of the sealing member, making it easier to grasp. However, in order for the knob to float above the sealing portion when the cap is actually removed, the knob must be bent (folded back) toward a position above the sealing portion. However, it is necessary to exert a force (restoring force) to recover the shape in the direction of canceling the bending (folding). In order to exert such a restoring force, the sealing member must have high rigidity, and is desired to be thicker and harder than before. However, such a thick and hard sealing member may hinder miniaturization, weight reduction, and cost reduction. On the other hand, if a thin sealing member similar to the conventional one is used, the knob may not float above the sealing portion when the cap is removed, and may be in close contact with the sealing portion. . In that case, it is not easy to pick up and hold the knob portion that is in close contact with the sealing portion, and the operability is poor.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a thin sealing member that can be easily peeled off by gripping a knob and has good operability, and a container including the same.

The present invention relates to a seal member that is detachably attached to a container body for containing contents, the seal member being detachably attached to a position that directly or indirectly closes an opening provided at one end of the container body. and a grip portion extending from a portion of the outer circumference of the sealing portion, the grip portion extending from a portion of the outer circumference of the sealing portion to a position that closes the opening. It is folded back to the opposite side and overlaps the sealing portion, the gripping portion has a protruding portion that protrudes toward the opposite side of the attachment surface, and the gripping portion protrudes from a part of the outer circumference of the sealing portion. , a first layer that is folded back to the opposite side of the sticking surface to the position that closes the opening and overlaps the sealing portion, and a second layer that is folded again at the position overlapping the sealing portion and overlaps the first layer. A laminated body in which a first layer and a second layer are adhered and integrated with each other in an overlapping state, and a protrusion is provided in a part of the laminated body. Characterized by

ADVANTAGE OF THE INVENTION According to this invention, the thin sealing member which can be peeled off easily by grasping a knob part, and has favorable operability, and a container containing the same can be implement|achieved.

1 is an exploded perspective view showing the entire container including the sealing member of the present invention; FIG. FIG. 2 is an enlarged perspective view of the sealing member shown in FIG. 1; FIG. 2 is an enlarged plan view of the sealing member shown in FIG. 1; FIG. 2 is a cross-sectional view of a main part of the container shown in FIG. 1; FIG. 2 is an enlarged perspective view of a modification of the sealing member of the present invention shown in FIG. 1; FIG. 6 is an enlarged plan view of a modification of the seal member of the present invention shown in FIG. 5; FIG. 7 is a cross-sectional view of a main part of a container including a modification of the sealing member of the present invention shown in FIGS. 5 and 6; FIG. 4 is a cross-sectional view of a main part of a second embodiment of the container of the present invention; FIG. 10 is a cross-sectional view of the essential parts of a third embodiment of the container of the present invention; FIG. 11 is an enlarged perspective view of a sealing member according to a fourth embodiment of the present invention; FIG. 11 is a cross-sectional view of a main part of a container including the sealing member shown in FIG. 10;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows the entire container including the sealing member 1 of the present invention. The container body 2 is made of a synthetic resin and is in the shape of a bottle or tube that is open at one end, and contains fluid contents (eg, mayonnaise, ketchup, etc.) or granular or powdery contents (eg, pepper, salt, sesame, etc.). It has a contents accommodating portion 2a to accommodate. A circular opening 2b is provided at the open end, which is one end of the container body 2, and a male threaded portion 2c is formed on the outer periphery of the open end. A resin sheet 3 having a discharge port 3a is attached to the opening 2b of the container body 2. As shown in FIG. The resin sheet 3 is non-peelably fixed to the end face around the opening 2b of the container body 2. As shown in FIG. A sealing member 1 is adhered so as to overlap the resin sheet 3 and cover the discharge port 3a and the opening 2b. Unlike the resin sheet 3 , the fixing strength of the sealing member 1 is weak and can be easily peeled off from the resin sheet 3 . A cap 4 is attached to the opening end of the container body 2 to which the resin sheet 3 and the sealing member 1 are thus attached.

As shown enlarged in FIGS. 2 and 3, the seal member 1 of the first embodiment of the present invention includes a circular sealing portion 1a that is adhered to a resin sheet 3 and covers a discharge port 3a and an opening 2b. , and an elongated band-shaped knob portion 1b extending from a portion of the outer circumference of the sealing portion 1a. The knob portion 1b extends from a portion of the outer periphery of the sealing portion 1a and is attached upward, that is, at a position that closes the opening 2b and the discharge port 3a (attachment surface, which is the lower surface in the drawing). The part folded back to the opposite side is folded back upward again at an intermediate position and overlapped, and the overlapped parts are fixed to each other to form an integrated laminate. Here, in a part of the outer periphery of the sealing portion 1a of the knob portion 1b, from the portion (connecting portion) that is folded back to the opposite side of the sticking surface to the position that closes the opening 2b and the discharge port 3a, the sealing portion A portion up to an intermediate position where the layer is folded again on 1a is referred to as a first layer portion L1. A portion from this intermediate position to a position overlapping the first layer portion L1 and extending to the outer peripheral side of the sealing portion 1a and terminating is referred to as a second layer portion L2. A layered body composed of the first layer portion L1 and the second layer portion L2 is arranged on the sealing portion 1a, and a part of the layered body extends upward from the sealing portion 1a, that is, is attached. A protruding portion 1b1 is formed by bending so as to protrude toward the opposite side of the attachment surface. The protruding portion 1b1 of the present embodiment is formed by bending the laminated body, and the protruding portion 1b1 protruding upward and the portion ( A folding portion 1b3 exists between the mounting portion 1b2 and the mounting portion 1b2. Although not shown, the sealing member 1 is made of a thin laminate film in which a metal foil made of aluminum is sandwiched between a synthetic resin (eg, polyethylene terephthalate) surface layer and an adhesive layer (sealant). . For the sake of convenience, the thickness of the seal member 1 (especially the first layer portion L1 and the second layer portion L2) is exaggerated and drawn thick in the drawings.

The cap 4 of the present embodiment shown in FIGS. 1 and 4 has an inner plate portion 4a provided with a nozzle portion 4a1 having a through hole which is a recess, and a hinge portion 4b that can be opened and closed with respect to the inner plate portion 4a. It is a double structure having a connected body portion 4c. A female threaded portion 4d is formed on the inner circumference of the cap 4 to be screwed with the male threaded portion 2c of the opening end of the container body 2 described above. The cap 4 is attached to the open end of the container body 2 by screwing the male threaded portion 2c into the female threaded portion 4d. At this time, the nozzle portion 4a1 is located on the opposite side of the bonding surface (lower surface in the drawing) when viewed from the sealing member 1 and facing the opening 2b. The protruding portion 1b1 of the knob portion 1b of the sheet member 1 described above is accommodated in the concave portion of the nozzle portion 4a1 of the cap 4. As shown in FIG. Therefore, the protruding portion 1b1 is not pressed so as to be in close contact with the sealing portion 1a, and the upwardly protruding crease of the sealing portion 1a is maintained and is not corrected. Here, the cap 4 may be a screw cap in which the inner plate portion 4a is screwed into the body portion 4c.

Before using this container, as described above, the resin sheet 3 is attached to the opening end of the container body 2 containing the contents, and the sealing portion of the sealing member 1 is placed on the resin sheet 3. 1a is attached. A knob portion 1b of the sealing member 1 is folded back at a position on the outer periphery of the sealing portion 1a and arranged on the sealing portion 1a. A portion of the knob portion 1b positioned above the sealing portion 1a, in the illustrated example, a portion closest to the center of the sealing portion 1a is bent to form a protruding portion 1b1. , that is, it protrudes on the opposite side of the attachment surface. A cap 4 is attached so as to cover this open end. A protruding portion 1b1 is accommodated in a concave portion of the nozzle portion 4a1 of the inner plate portion 4a of the cap 4 .

When using this container for the first time, the male threaded portion 2c and the female threaded portion 4d are unscrewed and the cap 4 is removed from the open end. The sealing member 1 is thereby exposed. Therefore, the user grabs and pulls the projecting portion 1b1 of the knob portion 1b, thereby peeling off the sealing portion 1a having a weak adhesive strength from the open end portion. At this time, since the resin sheet 3 is strongly adhered to the opening end, it is not peeled off, and only the seal member 1 is peeled off. By peeling off the sealing member 1, the ejection port 3a and the opening 2b are exposed. After peeling off the seal member 1 in this manner, the cap 4 is attached to the open end again. In actual use, the body portion 4c of the cap 4 is opened to expose the inner plate portion 4a. A user presses the content storage portion 2a of the container body 2 to eject the content to the outside through the ejection port 3a and the nozzle portion 4a1.

In the present embodiment, since the knob portion 1b is provided with the protruding portion 1b1, it is easy for the user to grasp and pull up, and the workability when peeling off the sealing member 1 is very good. Even if a portion (placement portion 1b2) of the knob portion 1b other than the projecting portion 1b1 is in close contact with the sealing portion 1a, the existence of the projecting portion 1b1 makes it easy to grasp the knob portion 1b and improve operability. good. Furthermore, when the projecting portion 1b1 is accommodated in the recess of the nozzle portion 4a1 of the cap 4, the shape of the projecting portion 1b1, which is easy for the user to grasp, is maintained without being crushed. No fear. In addition, since the knob portion 1b is arranged on the sealing portion 1a instead of extending downward along the side surface of the container body 2 (the side to be attached to the opening end portion), the knob portion 1b can be Even if the filling portion 1b is not made smaller than necessary, it does not hinder attachment or detachment of the cap 4 to or from the opening end portion of the container body 2. - 特許庁Therefore, the knob portion 1b can be formed in a size and shape that is easy for the user to grasp.

Also, although the whole seal member 1 is a thin sheet, the grip portion 1b is a laminate of two layers, so that it is strong enough not to be damaged even if a user grabs and pulls it. In this laminated body, the first layer portion L1 and the second layer portion L2 are fixed to each other and are not separated, so that it is easy to handle as one grip portion 1b having the strength of two sheets. Since the gripping portion 1b has a small area ratio when viewed from the entire sheet member 1, the increase in material and cost due to the stacking of the gripping portion 1b is small. Furthermore, in the case where the sealing member 1 is made of a sheet in which a sealant is provided on one side of a metal foil, the sealant of the first layer portion L1 and the sealant of the second layer portion L2 are folded and laminated so that they face each other. When the body is configured, it is easy to fix the first layer L1 and the second layer L2 to each other, and the sealant unintentionally contacts and sticks to another member (for example, the cap 4). is suppressed.

Furthermore, depending on the method of attaching the seal member 1 and the resin sheet 3, further advantages of the present embodiment may be exhibited. That is, the seal member 1 and the resin sheet 3 are held inside the cap 4 before assembly, and after the cap 4 is attached to the opening end of the container body 2, high-frequency vibration is applied to achieve a so-called Lectra seal. Depending on the method, the sealing member 1 and the resin sheet 3 may be attached to the opening 2b at the same time. When adopting such an attachment method, the resin sheet 3 is held inside the cap 4 before attachment. Therefore, although not shown, a groove (undercut portion) for holding the resin sheet 3 is provided inside the cap 4, and a part of the resin sheet 3 is inserted into the undercut portion to allow the resin sheet 3 to be held. is retained. However, if the knob portion 1b of the seal member 1 held inside the cap 4 together with the resin sheet 3 is positioned so as to partially overlap the undercut portion, the resin sheet 3 may be partially pinched. Interference with the fillet portion 1b prevents sufficient insertion into the undercut portion, lowering the reliability of holding. In some cases, the resin sheet 3 may fall out of the cap 4 . Arranging the knob portion 1b so as to partially overlap the undercut portion in this way means that the knob portion 1b extends downward (toward the attachment surface side) along the side surface of the container body 2. likely to occur in configuration. However, in this embodiment, the knob portion 1b does not extend downward along the side surface of the container body 2, but is folded upward (opposite side to the attachment surface) and arranged on the sealing portion 1a. Therefore, the knob portion 1b does not partially overlap the undercut portion. Therefore, the reliability of holding the resin sheet 3 within the cap 4 is not lowered.

Further, when the sheet member 1 is attached using high-frequency vibration by the Lectra seal method described above, the heat generated by the high-frequency vibration concentrates on the knob portion, which is an asymmetrical portion, causing temperature unevenness in the outer peripheral portion of the sealing portion 1a. may occur, resulting in poor fixation of the seal member 1 . However, in this embodiment, since the knob portion 1b extends above the sealing portion 1a, particularly toward the vicinity of the center of the sealing portion 1a, unevenness in temperature is less likely to occur in the outer peripheral portion of the sealing portion 1a. Therefore, the reliability of attachment of the sealing portion 1a is high. However, the present invention is not limited to the use of the Lectra-seal method, and is also effective when other fixing methods such as the heat-seal method are used.

Although not shown, as a modification of the present embodiment, instead of the nozzle portion 4a1 provided with one through hole, one large concave portion formed on the surface of the inner plate portion 4a on the side of the opening end portion is provided with an opening end. A wide nozzle portion having a configuration in which a plurality of (for example, three) openings open on the side opposite to the portion are in communication with each other may be provided. According to this configuration, a fluid content such as mayonnaise can be discharged in a plurality of thin streaks (eg, three streaks). In this configuration, the protruding portion 1b1 of the knob portion 1b is accommodated in a large concave portion with which a plurality of openings communicate. As a result, the various effects described above are exhibited, and since the nozzle portion and the recessed portion are wide, it is easy to maintain the shape and size of the knob portion 1b in an easy-to-grip manner. Furthermore, it becomes possible to form a larger projecting portion 1b1. As a result, operability can be further improved. Moreover, the projecting portion 1b1 may be provided at a portion other than the portion near the center of the sealing portion 1a.

Moreover, the method of folding the laminate composed of the first layer portion L1 and the second layer portion L2 for forming the projecting portion 1b1 is not particularly limited. In the above-described example, the laminated body is raised upward near the center of the sealing portion 1a (folded portion 1b3) and then bent to open on both sides in the width direction. However, as shown in FIGS. 5 to 7, it is also possible to fold the laminate from both side portions in the width direction toward the center portion and stack them, and then fold the stacked portions further upward. can. With such a bending method, even if the later-described knob portion 1b has a single-layer structure and the sealant is exposed on the surface, the projecting portion 1b1 may unintentionally come into contact with other members. It is possible to suppress the problem of sticking. In this way, according to the strength and ease of molding of the protruding portion 1b1, the protruding portion can be formed by any folding method. It can be folded only once. In some cases, instead of forming the projection by folding the laminated body, the grip portion 1b can be formed in a shape that originally has the projection 1b1. Further, it is also possible to form the sealing portion 1a and the knob portion 1b as separate members and join the separately formed sealing portion 1a and the knob portion 1b by adhesion or the like.

FIG. 8 shows the main part of the second embodiment of the invention. In this embodiment, the resin sheet 3 is omitted. Other configurations are the same as those of the first embodiment. The present invention is effective even in such a configuration in which the resin sheet 3 does not exist. In this case, the opening 2b of the container body 2 functions as a discharge port. The sealing member 1 is directly attached to the opening end of the container body 2 to directly block the opening 2b.

Also, FIG. 9 shows the main part of the third embodiment of the present invention. In this embodiment the cap 4 is not of double construction. The inner plate portion 4a, the nozzle portion 4a1, and the hinge portion 4b are not present, and the body portion 4c and the female screw portion 4d are integrated. Other configurations are the same as those of the first embodiment. The present invention is effective even if the cap 4 does not have a double structure. It is preferable that a space is provided inside the cap 4 so that the projecting portion 1b1 of the knob portion 1b can be accommodated without being deformed.

10 and 11 show a fourth embodiment of the invention. The knob portion 1b of the seal member of the first to third embodiments was a two-layer laminate composed of the first layer portion L1 and the second layer portion L2. In contrast, the knob portion 1b of the fourth embodiment has a single-layer structure. That is, the knob portion 1b extends from a portion of the outer periphery of the sealing portion 1a and is folded upward, that is, toward the lower surface in the drawing, which is the opposite side of the attachment surface, to the vicinity of the center of the sealing portion 1a. terminates above the Then, the end portion of the knob portion 1b having a single-layer structure is bent so as to protrude upward from the sealing portion 1a, that is, toward the opposite side of the attachment surface, thereby forming a protruding portion 1b1. there is As in the first to third embodiments, the protruding portion 1b1 is formed by bending the knob portion 1b, and a fold portion 1b3 exists between the protruding portion 1b1 protruding upward and the mounting portion 1b2. do. Since other configurations are the same as those of the first to third embodiments, the same reference numerals are given and description thereof is omitted. This embodiment is particularly useful in a configuration in which the knob portion 1b of the seal member 1 is not provided with an adhesive layer (sealant), the knob portion 1b has a simple configuration and is easy to form, and the amount of material used is reduced. and cost can be reduced. Note that the protruding portion 1b1 may be provided at a position other than the end portion of the knob portion 1b.

As is clear from each of the embodiments described above, the present invention provides a seal member 1 that closes the opening 2b of the container body 2 directly or indirectly via the resin sheet 3 before use and is peeled off at the start of use. Generally applicable. Since the protruding portion 1b1 is formed on the knob portion 1b of the sealing member 1, it is possible to obtain an effect that the operability when peeling off the sealing member 1 is excellent. When the projection dimension (height) of the projecting portion 1b1 is about 2 mm to 10 mm, the user can easily grasp the device.

In the first to fourth embodiments, the projecting portion 1b1 is provided at a position facing the center of the sealing portion 1a. However, the projecting portion 1b1 may be provided at a position other than the position facing the center of the sealing portion 1a. When the cap 4 is provided with the nozzle portion 4a1, it is preferable that the projecting portion 1b1 be arranged so as to be accommodated in the concave portion of the nozzle portion 4a1. Therefore, it is preferable that the position of the projecting portion 1b1 is determined according to the position of the nozzle portion 4a1.

1 Seal member 1a Sealing portion 1b Knob portion 1b1 Protruding portion 1b2 Mounting portion 1b3 Folding portion 2 Container main body 2a Contents accommodating portion 2b Opening 2c Male screw portion 3 Resin sheet 3a Discharge port 4 Cap 4a Inner plate portion 4a1 Nozzle portion 4b hinge portion 4c main body portion 4d female screw portion L1 first layer portion L2 second layer portion

Claims (9)

A seal member detachably attached to a container body containing contents,
a sealing portion detachably affixed to a position that directly or indirectly closes an opening provided at one end of the container body; a knob portion extending from a portion of the outer periphery of the sealing portion; has
the knob part is folded back from a part of the outer periphery of the sealing part to the opposite side of the sticking surface to the position that closes the opening and overlaps the sealing part;
The grip portion has a protruding portion that protrudes toward the opposite side of the attachment surface ,
The knob portion includes a first layer portion that is folded back from a part of the outer periphery of the sealing portion to the side opposite to the sticking surface that closes the opening and overlaps the sealing portion, and the sealing portion. a second layer portion which is folded again at a position overlapping with the stop portion and overlaps with the first layer portion, and the first layer portion and the second layer portion are fixed to each other in an overlapping state to be integral with each other. A seal member , which is a laminated body, and wherein the protrusion is provided in a part of the laminated body . 2. The sealing member according to claim 1, wherein the protruding portion is positioned to face the center of the sealing portion. Claim characterized in that there is a crease between the protruding part of the knob part and the part lying above and parallel to the sealing part. Item 3. The seal member according to Item 1 or 2 . 2. The protruding portion is accommodated in a recess of a nozzle portion arranged at a position facing the opening on the opposite side of the attaching surface when viewed from the sealing member. 4. The sealing member according to any one of 3 . A container comprising: the sealing member according to any one of claims 1 to 3 ; the container body; and a cap attached to cover the one end of the container body. The cap has a nozzle portion at a position facing the opening on the opposite side of the attachment surface when viewed from the sealing member, and the protruding portion is accommodated in a concave portion of the nozzle portion. 6. A container according to claim 5 , characterized in that 7. The container according to claim 6 , wherein said nozzle portion is located in the center of said cap. The cap includes an inner plate portion having the nozzle portion, a main body portion covering the one end portion, and a hinge portion connecting the main body portion to the inner plate portion so as to be openable and closable. A container according to claim 6 or 7 . The container body further includes a resin sheet attached to the one end of the container body and having a discharge port facing the opening, and the seal member is peeled off from the resin sheet so as to block the discharge port and the opening. 9. A container according to any one of claims 5 to 8 , characterized in that it is releasably attached.

Images