JP5196476B2 - Container sealing structure - Google Patents

Description

  The present invention relates to a container sealing structure, and more particularly to a container sealing structure in which a cap with a ratchet tamper-evidence band is screwed to a dispensing cylinder.

2. Description of the Related Art Conventionally, a container sealing structure that maintains the sealing performance of a container and its prevention of unauthorized opening by screwing a screw cap with a tamper-evident band onto a dispensing cylinder of the container is widely known. In that case, the TE band and the lower end of the skirt wall are connected by engaging a locking part formed on a tamper-evident band (hereinafter simply referred to as a TE band) with a locking part formed on the container when opening. The weakened part (bridging part) breaks and the TE band is cut off from the skirt wall and remains in the dispensing cylinder, so that it is possible to determine whether or not the container has been opened, and to guarantee that the container has been tampered with Is secured. As a locking mechanism between the TE band and the container main body, from a ratchet mechanism composed of a ratchet pawl intermittently formed on the outer peripheral surface of the dispensing cylinder of the container and a ratchet piece formed on the inner peripheral surface of the TE band And the latching mechanism of the engagement jaw formed on the dispensing cylinder and the flap piece formed on the inner peripheral surface of the TE band. In the former case, the ratchet pawl and the ratchet piece The locking is more reliable, and the tamper evidence is superior to the latter.
However, in the former case, the TE band and the dispensing cylinder are locked in the circumferential direction, and unlike the latter case, the TE band is separated from the skirt wall because it is free in the axial direction. After opening, since the TE band is moored to the dispensing cylinder, unless the special locking mechanism is provided between the TE band and the dispensing cylinder, there is a drawback that the TE band falls off when the contents are dispensed.

  Therefore, in the case of the conventional ratchet type tamper-evident cap, an annular protrusion is provided on the dispensing cylinder of the container and a protrusion engaging with the annular protrusion is provided on the inner peripheral surface of the TE band to prevent the TE band from falling off. ing. However, in that case, after the TE band is cut off from the skirt wall, the protrusion formed on the TE band rests on the upper part of the ratchet claw formed on the pouring tube, and the TE band is located below the pouring tube after opening. If it is not lowered and remains in the same position and is closed again, the gap between the lower end surface of the skirt wall of the cap body and the TE band is reduced, and it may be difficult to determine whether the cap has been opened or not. In order to solve the problem, the present applicant has formed a locking projection that can be engaged with a circumferential projection formed on the outer periphery of the container dispensing cylinder above the ratchet claw on the inner surface upper portion of the TE band. The ratchet tamper-evidence cap is arranged at a position upstream of the ratchet claw and on the upstream side of the cap opening direction with respect to the circumferential tip of the ratchet piece. (See Patent Document 1).

  On the other hand, when the container is filled with a liquid material or the like, the outer peripheral portion of the dispensing cylinder is injected at the time of filling or during the transport from the filling to the sealing process by spraying cleaning water such as sterile water to the outer peripheral portion after screwing the cap. The contents adhering to are washed away. In that case, in the flap locking tamper-evident cap, the cleaning water infiltrates between the outer periphery of the extraction cylinder where the cap is screwed and the inner peripheral surface of the cap body, and the infused cleaning water In order to facilitate removal, there is provided an axial flow path formed in the screw at a predetermined interval and a flow path formed in the annular locking jaw of the container body to which the TE band flap is locked. (For example, patent document 2).

Japanese Patent Laid-Open No. 09-150846 Japanese Patent Laid-Open No. 2003-261158

  The ratchet-type tamper-evidence cap described in Patent Document 1 provided above reliably prevents the TE band from falling off the dispensing cylinder after opening, and the TE band is surely placed below the dispensing cylinder after opening. It was able to fall and ensure excellent tamper evidence. However, when the container is subjected to cleaning after filling and sealing or retort sterilization with hot water or steam, the gap between the circumferential protrusion and the TE band upper inner peripheral surface is narrow, so the gap between the cap and the container dispensing cylinder There was a drawback that it was difficult for the washing water that had entered the engaging portion to escape. On the other hand, in such a ratchet type tamper-evident cap, the outer surface of the dispensing cylinder and the inside of the cap in the retort sterilized container discharged from the retort tank in the case of a retort container to facilitate infiltration and removal of washing water In order to improve the escape of water that has entered the engaging portion with the peripheral surface, for example, as described in Patent Document 2, it is conceivable to form axial flow paths in the screw portion and the annular protrusion. However, if water drain slits are formed in the circumferential projection at predetermined intervals, for example, the engagement between the circumferential projection and the locking projection for preventing the TE band from dropping may be displaced, and the TE band after opening There is a problem that the tethering becomes insufficient and sufficient tamper evidence cannot be obtained.

  Accordingly, the present invention provides a ratchet-type tamper-evident cap that can securely hold the TE band after opening the container in the dispensing cylinder of the container, reliably prevent the TE band from dropping, and can be used after the container is filled and sealed. Sealing of containers with excellent cleaning and drying properties, with easy cleaning and sterilization liquid penetration between the inner peripheral surface of the cap and the outer peripheral surface of the dispensing cylinder after mouth cleaning and retort sterilization The purpose is to provide a structure.

The container sealing structure of the present invention that solves the above problems is a container sealing structure in which a cap with a tamper-evident band is attached to a dispensing cylinder,
A male screw, a tamper evidence band fall prevention flange below the male screw, and a plurality of ratchets formed below the flange are formed on the outer peripheral surface of the dispensing cylinder, and the tamper evidence The band fall prevention flange is formed with a plurality of drainage cutouts at intervals in the circumferential direction.
A plurality of ratchet pieces that engage with ratchet claws formed on the dispensing cylinder when the cap is opened on the inner peripheral surface of the tamper evidence band of the cap, and the tamper evidence band above the ratchet claws. A plurality of tamper evidence band drop prevention ribs that engage with the fall prevention flange are formed at regular intervals in the circumferential direction,
The tamper evident band fall prevention flange is divided into a plurality of tamper evidence band fall prevention flange pieces having a non-uniform arc angle with respect to the shaft center due to the drainage notch, and the minimum tamper evidence band fall prevention flange. The arc angle of the piece is A,
When the angle between the tamper evident band fall prevention ribs is B, A> B,
The tamper-evident band fall prevention rib is disposed at a position displaced in the circumferential direction from the ratchet pawl, and the longitudinal cross-sectional shape of the tamper-evident band fall prevention rib is a gentle arc inclined surface from a vertical surface where the upper surface descends from the inner peripheral surface of the bridge. After reaching the leading edge, it is formed in a shape that reaches the step surface from the leading edge through the arc surface of the opposite curvature,
The pour tube is a pouch spout body having a welding attachment portion with the pouch .

According to the container sealing structure of the present invention, in the sealing structure by the ratchet tamper evident cap, a plurality of drainage notches are formed in the screw formed on the outer peripheral surface of the dispensing cylinder and the inner peripheral surface of the cap. The TE band drop prevention flange is also provided with a water drain notch, which facilitates cleaning, draining and drying of the cap / pumping tube engagement, and also facilitating draining and drying after retorting. Is done.
In addition, according to the container sealing structure of the present invention, since the minimum flange portion angle A of the TE band drop prevention flange and the angle B between the TE band drop prevention ribs are in a relationship of A> B, the TE band is always TE. The band fall prevention rib can be engaged with the TE band fall prevention flange, and the TE band can be reliably prevented from falling after opening, and the container sealing structure is excellent in tamper evidence and drainage drying. Can be obtained.
In addition, in the present invention, the TE band drop prevention rib is formed in the shape described in claim 1, so that when the bridge breaks during opening, the TE band easily falls by its own weight. In the mounted state, a constant gap is always formed between the upper edge of the TE band and the lower edge of the skirt wall of the cap, and it can be discriminated that it is opened at a glance, and the tamper evidence is excellent.
Furthermore, the present invention can be suitably used for a container sealing structure in which the dispensing cylinder is a pouch spout body having a welding attachment portion with a packaging material such as a pouch, and the TE band after opening the pouch container Can be reliably prevented, and a sealed structure excellent in tamper evidence and drainage drying can be obtained.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 6 show an embodiment of a container sealing structure according to the present invention. In this embodiment, the dispensing tube is applied to a spout body formed separately from the container body, and a pouch or the like is shown. A container sealing structure is formed by a combination of the spout body 1 assembled to the container main body and the cap 20 screwed together.

  The spout body 1 is formed from a pour cylinder 2 whose upper and lower ends are open, and an attachment base 3 for thermally welding a packaging material P that forms a container body such as a pouch in order from the bottom to the outer circumference of the pour cylinder. The flange portion 4 is formed. As shown in FIG. 1, there is a gap in the axial direction between the mounting base 3 and the flange portion (neck ring) 4, the mounting base 3 is located in the packaging material, and the flange portion 4 is exposed outside the packaging material. It is supposed to be.

  Furthermore, a ratchet claw 7, a TE band drop prevention flange 8, and a male screw 9 are sequentially formed on the outer peripheral portion of the dispensing tube 2 at the top of the flange portion 4. As shown in FIGS. 3 and 4, a plurality of ratchet claws 7 are provided with appropriate intervals. As will be described later, when the cap is rotated in the opening direction, the inner portion of the TE band 24 of the cap is provided. The left end edge is a locking surface 10 extending in the radial direction so that the tip of the ratchet piece 30 formed on the peripheral surface can be locked.

  The TE band drop prevention flange 8 is formed on the TE band as described later in order to prevent the TE band separated from the skirt wall at the time of opening from falling out from the spout part when the spout part is inclined for pouring. It is a stopper that is formed to protrude outward so that the formed TE band fall prevention rib is locked. The TE band fall prevention flange 8 is preferably a continuous annular flange in order to lock the TE band fall prevention rib. However, when the TE band fall prevention flange 8 is completely annular, the TE band fall prevention flange 8 is poured out from the inner peripheral surface of the cap skirt wall of the engaging portion. There arises a problem in that the cleaning water that has entered between the outer peripheral surfaces of the cylinders is deteriorated. In order to solve the problem, in this embodiment, as shown in FIG. 2, the TE band drop prevention flange 8 is formed with a plurality of drainage notches 11 in the vertical direction so that washing water can pass. The TE band drop prevention flange piece 8a is divided. However, if the locking of the TE band drop prevention rib is hindered by the drainage notch, the function of the TE band fall prevention flange is impaired, so the drainage notch is locked to the TE band fall prevention rib. Therefore, it is necessary to devise the formation position and interval so that water can be drained well. In order to achieve this, in this embodiment, as will be described later, an arc angle (hereinafter referred to as a flange portion angle) with respect to the axial center of the TE band drop prevention flange piece 8a protruding between the drainage notches 11 is shown. As shown in FIG. 2, it is formed non-uniformly, and the minimum flange portion angle A is formed to be larger than the TE band fall prevention rib angle B formed in the TE band.

  The male screw 9 is formed so as to be screwed with a female screw formed on the cap so that the cap can be screwed. The male screw 9 is also formed with a notch 12 for draining in the vertical direction so that washing water flows down. It is formed as follows. The drainage notch 12 may be arranged arbitrarily, but in order to make the washing water flow more easily, it is provided at a position coinciding with the notch formed in the TE band drop prevention flange. Is desirable.

  The cap 20 includes a top wall 21, a skirt wall 22, and a TE band 24 connected to the lower end of the skirt wall via a bridge portion 23. On the inner peripheral surface of the skirt wall, a female screw 25 that is screwed into a male screw formed in the spout portion is formed, and a flow path 26 is formed in the female screw 25 by a notch penetrating in the axial direction. Yes. The bridging portion 23 is formed by a plurality of bridges 29 that connect the lower end of the skirt wall and the upper end surface of the TE band. A substantially triangular projection 27, 27 is provided, and a recess 28 having a shape along the outer shape of the projection 27 is formed on the lower end surface of the skirt wall 22 corresponding to the portion where the projection 27 is formed. As shown in FIG. 5, the protrusion 27 formed on the upper end surface of the TE band 24 has a rising surface 27a on the plugging direction side as an upright surface and a rising surface 27b on the plugging direction side as an inclined surface. The part 27 c is formed in a horizontal plane, and the shape of the recess 28 of the skirt wall 22 is also formed in a shape corresponding to the protrusion 27. By forming such protrusions 27 and recesses 28, it is possible to effectively prevent the breakage of the bridge 29 when the virgin cap is attached to the dispensing tube 2, and to smoothly open the cap. It can be carried out.

  The TE band 24 is formed with a plurality of ratchet pieces 30 at a constant pitch in the circumferential direction from the lower end open portion to a certain height, which are engaged with the ratchet pawl 7 formed on the dispensing cylinder. As shown in FIG. 2, the ratchet piece 30 has a base portion integrated with the inner peripheral surface of the TE band and has a tip extending from the base portion in the opening circumferential direction. The front end is locked with the locking surface 10 of the ratchet claw 7 formed at the spout portion, thereby giving resistance to the rotation of the TE band and breaking the bridge 29.

  The inner peripheral surface of the TE band has a stepped surface 31 whose upper surface where the upper portion of the position where the ratchet piece 30 is formed protrudes slightly in the radial direction is communicated with the inner peripheral surface of the bridge portion. A plurality of TE band drop prevention ribs 32 are provided so as to protrude from the inner peripheral surface of the TE band at a predetermined pitch so as to protrude in a radial direction from 31. The TE band fall prevention rib 32 is formed at a position shifted in the circumferential direction from the ratchet pawl 7, and when the TE band is separated from the skirt wall of the cap body, the TE band fall prevention rib 32 is lowered. Further, the band fall prevention rib 32 is engaged with the ratchet pawl to prevent the fall from being prevented.

  As shown in an enlarged view in FIG. 3, the TE band drop prevention rib 32 is formed on the TE band drop prevention flange 8 formed on the pouring cylinder in a state where the cap is attached to the pouring pipe and the outlet is sealed. The tip edge 32a of the TE band drop prevention flange 8 needs to be positioned at least in the lower projection plane of the tip edge 8a of the TE band drop prevention flange 8. As a result, the TE band drop prevention flange 8 functions as a stopper, and the tip of the TE band drop prevention rib 32 contacts the TE band drop prevention flange 8 even if the TE band 24 is about to come off when the container is tilted after opening. Contact and fall can be prevented. The shape of the TE band drop prevention rib 32 is such that the top surface of the TE band drop prevention rib 32 passes through a gentle arc inclined surface 32b from the vertical surface where the upper surface descends from the inner peripheral surface of the bridge as shown in FIG. 32a, the arc surface 32c having the opposite curvature from the leading edge, and further to the step surface 31. By forming the TE band drop prevention rib 32 in such a shape, the TE band drop prevention rib 32 abuts against the TE band drop prevention flange 8 at the time of opening, and when the bridge breaks, the TE band has the stepped surface 31 ratchet. It easily falls by its own weight until it comes into contact with the upper surface of the piece 7. Therefore, when the cap is attached after opening, there is always a certain gap between the upper edge of the TE band and the lower edge of the skirt wall of the cap. Excellent dent properties.

  When the angle between the adjacent TE band fall prevention ribs 32 is an angle B between the TE band fall prevention ribs, the pitch of the TE band fall prevention ribs 32 is p, and the circumferential length of the TE band fall prevention ribs 32 is w, B = p + w. The angle B between the TE band drop prevention ribs is desirably A> B in relation to the minimum flange portion angle A in order to reliably prevent the TE band from coming out of the dispensing cylinder after opening. Phenomenologically, even if the relationship of A> B is not necessarily satisfied, as can be seen from FIG. 2, the TE band does not fall if the minimum TE band fall prevention flange portion is placed on the TE band fall prevention rib 32. However, in this case, since the strength is weakened, it is desirable to have the above relationship.

  In the container sealing structure according to the present embodiment formed as described above, the cap is attached to the spout body in the same manner as this type of ratchet tamper evidence cap after the container is filled with the contents. The container is sealed as shown. When cleaning and / or retort sterilization of the cap mounting portion of the container in this state, the cleaning water that has infiltrated between the inner peripheral surface of the cap and the outer peripheral surface of the dispensing cylinder is a notch 12 for draining formed between the screws. 26 and the drainage notch 11 formed in the TE band drop prevention flange 8 of the dispensing tube, and smoothly falls from the lower end of the TE band to the flange portion 4, and the leading edge 8 a of the TE band fall prevention flange 8 Even if the gap between the inner peripheral surface of the TE band is small, water is drained well and drying is fast.

  Further, when the cap 20 is turned in the opening direction when opening, the ratchet piece 30 formed on the inner peripheral surface of the TE band is engaged with the ratchet claw 7 with a relatively small angle rotation, thereby preventing the TE band from rotating. Then, the force concentrates on the bridge 29, the bridge is broken, and the cap 20 is opened. When the bridge breaks, the TE band is completely separated from the lower end of the skirt wall and falls due to its own weight. At this time, in this embodiment, the TE band drop prevention rib 32 is arranged at a position shifted in the circumferential direction from the ratchet claw 7, so that the fall is not hindered by the ratchet claw 7, and the step surface 31 is It falls until it is supported by the upper surface of the ratchet claw 7. Therefore, when the cap is resealed, the gap between the lower end of the skirt wall of the cap and the upper end of the TE band supported by the flange portion is large. Are better.

  Furthermore, when the container is tilted to pour out the contents after opening, the TE band moves in the pour direction due to its own weight. At this time, the minimum flange portion angle A of the TE band drop prevention flange 8 is set to the TE band. Since it is larger than the angle B between the fall prevention ribs, at least one of the adjacent TE band fall prevention ribs 32 is engaged with the TE band fall prevention flange 8. Therefore, the fall of the TE band is surely prevented, and the accident that the TE band falls off during the pouring can be prevented, and since it cannot be removed from the pouring cylinder unless the TE band is cut, the tamper evidence is also improved. Are better.

  Although the container sealing structure of the present embodiment has been described above, the present invention is not limited to the above-described embodiment, and various design changes can be made within the scope of the technical idea. In the above embodiment, the spout body is formed separately from the container main body. However, the present invention may of course be formed in the mouth and neck part integrated with the bottle container main body.

  The container sealing structure in which the cap with the tamper-evidence band is attached to the pouring cylinder of the present invention is the container sealing structure in which the cap with the ratchet type TE band is screwed. Can be reliably prevented, and the cap engaging part is excellent in draining and drying, so that the liquid content is filled and sealed, and is useful for retort sterilization and washing. The container can be used for a wide range of containers such as pouches and bottle-shaped containers.

It is a partial cross section front view in the state where a sealing structure of a container concerning an embodiment of the present invention was shown and a cap was screwed into a spout body. It is the II sectional view taken on the line in FIG. It is a cross-sectional principal part enlarged view of FIG. It is a front view of the extraction body shown in FIG. It is front sectional drawing of the cap shown in FIG. It is the front view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outlet body 2 Outlet tube 3 Mounting base 4 Flange part 5 TE band holding cylinder part 7 Ratchet claw 8 TE band fall prevention flange 9 Male screw 10 Locking surface 11 Notch 12 Notch 20 for draining Cap 21 Top wall 22 Skirt Wall 24 TE Band 25 Female Thread 26 Notch 27 for Drainage 27 Projection 28 Recess 29 Bridge 30 Ratchet Piece 31 Stepped Surface 32 TE Band Drop Prevention Rib

Claims (1)

It is a sealed structure of a container with a tamper-evident band cap attached to the dispensing cylinder,
A male screw, a tamper evidence band fall prevention flange below the male screw, and a plurality of ratchets formed below the flange are formed on the outer peripheral surface of the dispensing cylinder, and the tamper evidence The band fall prevention flange is formed with a plurality of drainage cutouts at intervals in the circumferential direction.
A plurality of ratchet pieces that engage with ratchet claws formed on the dispensing cylinder when the cap is opened on the inner peripheral surface of the tamper evidence band of the cap, and the tamper evidence band above the ratchet claws. A plurality of tamper evidence band drop prevention ribs that engage with the fall prevention flange are formed at regular intervals in the circumferential direction,
The tamper evident band fall prevention flange is divided into a plurality of tamper evidence band fall prevention flange pieces having a non-uniform arc angle with respect to the shaft center due to the drainage notch, and the minimum tamper evidence band fall prevention flange. The arc angle of the piece is A,
When the angle between the tamper evident band fall prevention ribs is B, A> B,
The tamper-evident band fall prevention rib is disposed at a position displaced in the circumferential direction from the ratchet pawl, and the longitudinal cross-sectional shape of the tamper-evident band fall prevention rib is a gentle arc inclined surface from a vertical surface where the upper surface descends from the inner peripheral surface of the bridge. After reaching the leading edge, it is formed in a shape that reaches the step surface from the leading edge through the arc surface of the opposite curvature,
The container sealing structure, wherein the pour tube is a pouch spout body having a welding attachment portion with the pouch .

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