JPH08301318A - Closing device and synthetic resin cap - Google Patents

Abstract

PURPOSE: To exhibit satisfactory tamper evidence, by making the cut strength of at least one of a plurality of bridges lower than that of the others, thereby reducing an angle at which each bridge is cut in a capped container. CONSTITUTION: In a cap 50, 16 plate-like leaders 55a are arranged apart from one another in a circumferential direction, on a border between a main part 57 and TE-ring 58. Parts of the leaders 55a are cut by a horizontal score 56 and their uncut parts serve as bridges 55(X) and 55(Y). The cut strength of the bridge 55(X) is greater than that of the bridge 55(Y). A container mouth has four lock claws arranged with certain amounts of space between them, and the cap 50 has many lock projections 60 on the internal wall of its TE-ring 58, therefore the bridges 55(X) and 55(Y) are cut at the small angle of turning. Therefore, this reduces an angle at which each bridge is cut.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container having a threaded portion formed on the outer periphery of a mouth portion, and a tamper evidence ring portion screwed into the mouth portion of the container and connected to the lower portion of the cylinder portion when the container is opened. The present invention relates to a closure device which is separated from a main part of a cap and has a tamper-evidence synthetic resin cap that indicates opening.

[0002]

2. Description of the Related Art Conventionally, a container having a threaded portion at its mouth and a cap opening ring portion which is screwed into the mouth of the container and is connected to the lower portion of the cylinder when the cap is opened. Various types of closure devices have been proposed as a closure device that includes a cap that has a function of displaying the opening by disconnecting from the closure (referred to as pilfer proof property or tamper evidence property).

FIG. 10 shows, as an example of a conventional closing device, a closing device composed of a cap and a container corresponding thereto, which is described in Japanese Patent Publication No. 52-14677. This closure device comprises a top portion 3, a tubular portion 4 extending downward from the top peripheral edge and having a screw 5 therein, and a cap body 2.
A cap 1 provided with a bridge 6 which is broken by a check force of a container check projection 14 and a cap check projection 8 when it is rotated in an opening direction, and an annular body 7 partitioned from the cap body 2 by the bridge 6. Then, a closing device comprising a male screw 13 formed on the mouth 12 so that the cap 1 can be mounted and a container 11 having a container non-return projection 14 formed on the lower portion of the male screw 13 is described. There is. In this closing device, when the cap 1 is rotated in the opening direction, the cap check projection 8 provided on the inner surface of the annular body 7 of the cap 1 is provided.
Engages with the container check projection 14 provided on the container 11,
As a result, the rotation of the annular body 7 is blocked, the bridge 6 is cut, and the annular body 7 is separated from the cap main body 2.

FIG. 11 shows a synthetic resin container lid (cap) disclosed in Japanese Examined Patent Publication No. 1-30702 as another example of the conventional closing device.
There is described a container having a container mouth 30 in which 1 and a jaw 32 provided below the male screw 31 are formed, and a cap 20 attached to the container. This cap 2
The reference numeral 0 includes a top plate portion 21 and a tubular portion 22 that hangs down from the peripheral portion thereof, and the tubular portion 22 is defined by a plurality of circumferentially extending slits 23 and a bridge 24 existing between the slits. A breaking line 25 is formed, and the tubular portion 22 is partitioned into a main portion 26 above the breaking line 25 and a pill fur proof hem portion 27 below the breaking line, and the inner surface of the main portion 26 has a container mouth portion. A threaded portion 28 that is screwed into the male thread 31 of 30 is formed, and a plurality of projections 29 that project inward in the radial direction are formed on the inner surface of the pill fur proof skirt 27 at positions apart from the bridge 24. ing.
As shown in FIG. 12, the protrusion 29 is formed in such a shape that the amount of protrusion inward in the radial direction gradually increases from the lower side to the upper side in the axial direction.

In this closing device, when the cap 20 is attached to the container mouth 30, the pill fur proof hem 27
Elastically deforms, and the projection 29 passes over the jaw portion 32 of the container mouth portion 30 and enters below. Then, when the cap 20 attached to the container mouth 30 is rotated in the opening direction, the protrusion 29 provided on the inner surface of the pill fur proof hem 27 is locked to the lower end of the jaw of the container mouth 30, and the pill Prevents upward movement of the fur proof hem 27, resulting in a cap 2
The tensile force acts on the bridge 24 connecting the main part 26 of 0 and the pilfer proof skirt 27, the bridge 24 is cut, and the pilfer proof skirt 27 is separated.

[0006]

However, the above-described conventional closing device has the following problems. The closure device described in the former Japanese Patent Publication No. 52-14677 discloses a cap check projection 8 or a container mouth 11 formed on the inner surface of the annular body 7 when the cap 1 is mounted on the container mouth 11. It is necessary to compress the formed container check projections 14 and rotate them relative to each other, but in order to compress these check projections, it is necessary to apply a considerable torque to the cap, and therefore the cap 1 It is relatively difficult to install and the bridge is broken when the cap is installed due to a considerably large torque applied to the cap. In order to solve the drawback, it is conceivable to reduce the amount of protrusion of the check protrusion or to make the check protrusion soft or flexible. In this case, the cap 1 is attached to the container mouth 11. After that, the engagement between the cap check projection 8 and the container check projection 14 becomes insufficient, and the tamper evidence property due to the unsealing display is impaired. In addition, in this cap, it is necessary to set the bridge strength to some extent to prevent the bridge from being broken when the cap is attached, and moreover, because the structure is such that multiple bridges are cut almost simultaneously, when opening the cap There was a problem that the opening torque became very large. Further, in the closure device described above, the cap 1
Also, there is a drawback that the shape of the container mouth is peculiar and it is difficult to apply it to an ordinary synthetic resin cap or metal cap.

The cap 20 described in Japanese Patent Publication No. 1-30702 is the pill fur proof hem 2.
By providing the protrusion 29 of 7 and the bridge 24 separately, the pill fur proof skirt 27 is provided when the protrusion 29 gets over the jaw 32 of the container mouth 30 when the cap 20 is mounted on the container mouth 30. Bridge 2 even if elastically deformed
4 is prevented from breaking. However, when the cap 20 is opened, the protrusion 29 provided on the inner surface of the pill fur proof skirt 27 is locked to the lower end of the jaw of the container mouth 30 to prevent the pill fur proof skirt 27 from moving upward. Since the structure is such that the bridge 24 is blocked by the tensile force acting on the bridge 24 that connects the main portion 26 of the cap 20 and the pill fur proof skirt 27 as a result,
If the cap is made of synthetic resin, the bridge 24
When a pulling force is applied to the bridge 24, the bridge 24 is easily stretched, and in order to cut it, the cap body has to be rotated by a considerable angle in the opening direction.

In this type of tamper-evidence cap, when the cap attached to the container mouth is turned in the opening direction from the initial position, the upper end of the container mouth separates from the inner surface of the cap or the liner. The rotation angle (seal release angle; hereinafter referred to as SR) at the time when the sealing property of the container is released, and the bridge when the cap attached to the container mouth is rotated from the initial position in the opening direction. Rotation angle to the position to be cut (bridge cutting angle; hereinafter B.
S.R.A.-BBA. = 0 degree or more, preferably 30 degrees or more. That is, when the cap is opened, it is desirable that the bridge be cut before the upper end of the container opening is separated from the liner or the like to release the hermetic seal. As a cap of the closing device, a cap made of a metal such as aluminum alloy is used, and the cap is put on the container mouth, and the cylinder is wound around the outer circumference of the container mouth. Can be made as small as 90 degrees or less, so that the SRABABA value can be made large. However, in the synthetic resin cap 20 described above, BBA may increase due to the extension of the bridge 24, and SRBA-BBAA may become 0 degrees or less.
There were points to be improved from the viewpoint of improving the tamper evidence.

Further, the cap 20 is attached to the container mouth 30.
When the pill fur proof hem 27 is elastically deformed when it is mounted on the chin, the protrusion 29 causes the protrusion 29 to move to the jaw 3 of the container mouth 30.
If the mechanical strength of the bridge 24 is weak, the bridge 24 may be cut when the cap is screwed, even if the protrusion 29 of the pilfer proof skirt 27 and the bridge 24 are provided separately. In order to prevent such inconvenience, the strength of the bridge 24 is increased, or engaging pieces are provided above and below the breaking line 25 as shown by reference numerals 34 and 35 in FIGS. Can be prevented from being cut. However, if the strength of the bridge 24 is increased, it may be difficult to open the cap, or the bridge 24 may not be cut, and the tamper evidence property may be impaired. Further, it is not possible to provide the engaging pieces above and below the breaking line 25. It is difficult in the normal cap manufacturing process, a special manufacturing process is indispensable, and the manufacturing cost is increased.

The present invention has been made in view of the above circumstances, and it is possible to reduce BBA when a synthetic resin cap is attached in a closing device including a synthetic resin cap and a container, which is favorable. The object of the present invention is to provide a closing device and a synthetic resin cap that can exhibit excellent tamper evidence. Another object of the present invention is to obtain a proper opening torque by reducing the resistance when the synthetic resin cap attached to the container opening is turned in the opening direction to cut a plurality of bridges. The purpose is to provide a closure device and a synthetic resin cap that are used.

[0011]

In the closing device according to the present invention, a threaded portion is formed on the outer periphery of the mouth portion, and a bulging step portion bulging radially outward is formed below the threaded portion. Tamper evidence ring part (hereinafter, TE ring part) that is divided from the main part by a horizontal score, which includes a container, a top plate part, and a cylinder part that hangs down from the periphery of the container, leaving a plurality of bridges under the cylinder part. And a cap made of synthetic resin (hereinafter referred to as a cap) provided with a threaded portion that is screwed into the threaded portion of the container on the inner wall surface of the main part. One locking claw is provided below the projecting part via the reduced diameter part or a plurality of locking claws are spaced apart in the circumferential direction, and is attached to the container mouth part on the inner wall surface of the TE ring part of the cap. Engages the locking claw when turning the opened cap in the opening direction Retaining projection is provided, at least one cutting intensity among the plurality of bridges, is characterized in that it is formed by weaker intensity than breaking strength of other bridges.

In the closing device of the present invention, the cutting strength of the plurality of bridges may be three or more. In the closing device of the present invention, a slow-prevention protrusion having an inclined surface that is formed to project downward from the lower end of the main portion of the cap and that gradually reduces the protruding height in the opening direction, and the slow-prevention protrusion. Providing a delay preventing means composed of an engaging projection provided so as to be close to the side surface in the closing direction and partially or wholly located on the TE ring portion side, and a bridge on the opening direction side of the delay preventing projection. May be arranged close to each other. The engagement protrusion of the slow-moving preventing means is a protrusion disposed on the upper end of the TE ring portion, one surface of which is close to the side surface of the slow-moving preventing protrusion in the closing direction, or the boundary between the cap main portion and the TE ring portion. It may be either one of the projections provided on the portion and cut by the horizontal score so that a part of the projection is interlocked with the TE ring portion. Further, the angle of the inclined surface of the delay prevention protrusion may be in the range of 15 to 60 degrees. In the closure device of the present invention, the TE ring portion of the cap may be provided with a vertical score that opens the TE ring portion into a band shape at substantially the same time as the cutting of the bridge or immediately after the cutting of the bridge. In the closing device of the present invention, the length from the lower end of the bulging step portion of the container to the upper end of the locking claw may be 3.0 mm or more. In the closing device of the present invention, the cap attached to the container mouth is rotated in the opening direction, and the bridge cutting angle, which is the rotation angle up to the position where the bridge is cut, is 90.
It may be less than the degree.

The cap of the present invention is a mouth part of a container in which a thread part is formed on the outer periphery of the mouth part, and one or a plurality of locking claws are provided below the thread part so as to be spaced apart along the circumferential direction. A TE ring part that is a screw-fitted cap and that includes a top plate part and a tube part that hangs from the periphery thereof, and that is divided from the main part by a horizontal score leaving a plurality of bridges at the bottom of the tube part. And a threaded portion to be screwed into the threaded portion of the container is provided on the inner wall surface of the main portion, the cap attached to the container mouth portion is provided on the inner wall surface of the TE ring portion in the opening direction. A locking projection that engages with the locking claw when being turned to is provided, and at least one cutting strength of the plurality of bridges is formed to be weaker than the cutting strength of the other bridges. There is.

In the cap of the present invention, the cutting strength of the plurality of bridges may be three or more. In the cap of the present invention, a slow-prevention protrusion having an inclined surface that is formed to project downward from the lower end of the main portion of the cap body and that gradually reduces the protruding height in the opening direction; Is provided with an engagement protrusion provided so as to be close to the side surface in the direction of the TE ring portion and partially or wholly, and a bridge is provided on the opening direction side of the delay prevention protrusion. The configuration may be such that they are closely arranged. The engagement protrusion of the slow-moving preventing means is a protrusion disposed on the upper end of the TE ring portion, one surface of which is close to the side surface of the slow-moving preventing protrusion in the closing direction, or the boundary between the cap main portion and the TE ring portion. It may be either one of the projections provided on the portion and cut by the horizontal score so that a part of the projection is interlocked with the TE ring portion. Further, the angle of the inclined surface of the retardation preventing projection may be in the range of 15 to 60 degrees. In the cap of the present invention, the TE ring portion of the cap may be provided with a vertical score that opens the TE ring portion in a band shape almost at the same time as the cutting of the bridge or immediately after the cutting of the bridge.

[0015]

The closure device according to the present invention comprises a container provided with a locking claw disposed below the bulging step portion with a reduced diameter portion or a plurality of locking claws spaced apart along the circumferential direction, and a TE ring. A cap provided with a locking projection for engaging the locking claw on the inner wall surface of the container, the cap being attached to the mouth of the container, and when the cap is rotated in the opening direction, The locking claw and the locking projection of the cap are engaged with each other, and the rotation of the TE ring portion is blocked. As a result, the rotational force for rotating the cap in the opening direction directly acts on the bridge, and the bridge is easily cut. Then, a plurality of locking claws are arranged at intervals below the bulging step of the container mouth, and a plurality of locking protrusions are arranged on the inner wall of the TE ring portion of the cap, so that the container is attached to the container mouth. By rotating the cap in the opening direction, the bridge cutting angle (BBAA), which is the rotation angle up to the position where the bridge is cut, can be reduced to 90 degrees, preferably 45 degrees or less.

Further, according to the present invention, the cutting strength of at least one of the plurality of bridges of the cap is formed to be weaker than the cutting strength of the other bridges. Turn in the opening direction,
The locking claw of the container and the locking projection of the cap are engaged to
When the rotation of the ring part is blocked and the bridge is cut, the bridge with weakened cutting strength is cut first, and then the other bridges are cut. All bridges have the same cutting strength, and when all bridges are cut at the same time, the opening torque at the time of cutting the bridge is high, but in the cap of the present invention, the cutting timing between the weakened bridge and other bridges can be shifted This reduces the opening torque when the bridge is cut.

Further, according to the present invention, a delay preventing projection having an inclined surface which is formed on the cap so as to project downward from the lower end of the main portion and which gradually decreases the protruding height in the opening direction, and the delay preventing projection. Providing a delay preventing means including an engaging projection provided so as to be close to a side surface of the projection in the cap closing direction and partially or wholly located on the TE ring portion side, and the delay preventing projection has a cap opening direction side. By placing the bridge close to the container, the cap is put on the container opening, and when the cap is rotated in the closing direction and screwed and fitted, the engaging projection contacts the side surface of the delay prevention projection in the closing direction, Since the rotation of the TE ring portion is completely matched and interlocked with the rotation of the main portion in the closing direction, the bridge can be mounted without extra force being applied to the bridge when the cap is tightened. When the cap attached to the container mouth is rotated in the opening direction, the locking claw of the container and the locking projection of the cap are engaged with each other to prevent the TE ring from rotating, and as a result, the cap is closed. The rotational force that rotates in the opening direction acts directly on the bridge, the bridge is cut, and the remaining part of the cut bridge moves along the inclined surface of the anti-slow protrusion to separate the TE ring part from the main part. By pressing in the direction, the TE ring portion that is cut from the bridge and separated from the main portion can be reliably separated from the main portion.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings. 1 to 4 show an embodiment of a closing device and a synthetic resin cap according to the present invention, in which reference numeral 50 is a cap and 70 is a container. In this embodiment, the cap 50 is made of synthetic resin such as polypropylene. The container 70 is made of synthetic resin such as polyethylene terephthalate (PET). The container 70 is not limited to this embodiment and may be a glass container.

The cap 50 has a circular top plate portion 51.
And a cap main body 53 including a tubular portion 52 that hangs down from the peripheral edge of the top plate portion 51, and a thin liner 54 provided on the inner surface side of the top plate portion 51 of the cap main body 53. There is. The tubular portion 52 has a horizontal score 56, leaving a plurality of thin bridges 55 (55 (X), 55 (Y)), a main portion 57 above the horizontal score 56, and a TE ring portion below the horizontal score 56. It is divided into 58 and. On the inner wall surface of the main portion 57, a screw portion 59 that is screwed with a male screw 71 formed on the outer periphery of the mouth portion of the container 70 is formed. Further, on the inner wall surface of the TE ring portion 58, there are ratchet structures in which eight locking projections 60 are formed at predetermined intervals along the circumferential direction, the projection heights of which gradually increase along the opening direction.

In this cap 50, 16 plate-shaped leaders 55a are arranged at intervals at the boundary between the main portion 57 and the TE ring portion 58 along the circumferential direction. These leaders 55a are partially cut by a horizontal score 56, and the uncut portions thereof are bridges 55 (X) and 55 (Y). The broken line with the reference numeral 65 in FIG. 2 indicates a cutting line of the horizontal score 56, and the outer side in the radial direction of the cutting line 65 is cut by the horizontal score 56. In the present embodiment, the cutting strength of these bridges 55 is (X),
There are two types (Y), and the cutting strength of the bridge 55 (X) is set to be larger than that of the bridge 55 (Y). In this embodiment, the bridge 55 having high cutting strength is used.
(X) and weak bridges 55 (Y) are alternately arranged, but bridges 55 (X), 55 having different cutting strengths are used.
The arrangement of (Y) is not limited to this embodiment. For example, the cutting strength is set to three types of strong, medium, and weak in order along the circumferential direction, or the cutting strength is sequentially increased along the circumferential direction (or You can make it weaker). To properly adjust the cutting strength of the bridges 55 (X) and 55 (Y), the thickness of the leader 55a may be adjusted or the length inward in the radial direction (that is, the remaining length when cutting by the horizontal score 56) may be adjusted. It is possible by adjusting

The cutting strength of these bridges 55 (X) and 55 (Y) is such that the weak bridge 55 (Y) is not cut when the cap 50 is attached to the container mouth 70a, and
When the cap is opened, the weak bridge 55 (Y) is cut first, and then the strong bridge 55 (X) is cut. The breaking strength of the weak bridge 55 (Y) is set to 50 to 98, which is set so as to reduce the opening torque and is preferably the breaking strength of one bridge 55 when the bridges 55 having the same breaking strength are arranged.
%, The cutting strength of the strong bridge 55 (X) is 100 to
It is about 150%.

The cap 50 has a slow-prevention projection 62 which is formed so as to project downward from the lower end of the main portion 57 and has an inclined surface 61 which gradually reduces the projection height in the opening direction.
A delay prevention means 64 is provided which is composed of an engagement projection 63 that is arranged in proximity to the side wall 62a in the closing direction of the delay prevention projection 62. The slow-moving prevention means 64 includes two bridges 55 (X), 55 provided between two adjacent locking projections 60, 60.
It is provided so as to be sandwiched between (Y), and one of the bridges 55 (X) is arranged close to the end of the inclined surface 61 of the delay prevention projection 62 in the opening direction. The delay prevention protrusion 62 is cut by the horizontal score 56 to about half its thickness as shown by a cutting line 65 in FIG. 2, but is linked to the main portion 57 side. The engaging protrusion 63 is completely cut by the horizontal score and divided into the main portion 57 side and the TE ring portion 58 side. In this embodiment, as shown in FIG. 3, the retardation preventing projection 62 is formed on the horizontal annular surface 67 formed in the vicinity of the TE ring portion 58 of the cap body main portion 57 so as to project.

The engagement projection 63, which is disposed in the vicinity of the delay prevention projection 62, has a shape having an inclined surface which gradually reduces the protruding height inward in the radial direction toward the closing direction, and its side surface 63a in the opening direction. Is a substantially vertical surface that is reliably engaged with the side surface 62a of the delay prevention protrusion 62 in the closing direction. In this embodiment, the engagement protrusion 63 is formed at a position that covers both the main portion 57 and the TE ring portion 58, and is cut by the horizontal score 56. The engagement projection 63 may have its side surface 63a in the opening direction reliably engaged with the side surface 62a in the closing direction of the delay prevention projection 62, and its shape and formation position are not limited to those in this embodiment. For example, the engagement protrusion 63 may be formed on the TE ring portion 58 side, and may be configured to engage with the TE ring portion side protrusion of the retardation prevention protrusion 62.

The protrusion height of the delay prevention projection 62 and the engagement projection 63 of the delay prevention means 64 is such that
It is sufficient that the height is such that it does not come into contact with the upper end of the locking claw 74 of the container 70 in the state of being mounted on the container 0a, but preferably the horizontal score 56
To about 0.5 to 2.5 mm. Anti-slow projection 62
The distance between the engaging projection 63 and the engaging projection 63 is less than the width of the bridge 55, preferably less than 0.5 mm. The inclination angle α of the inclined surface 61 of the delay prevention protrusion 62 shown in FIG. 4 is set to 15 to 60 degrees. When the angle α is smaller than 15 degrees, the delay prevention means 64
The engaging projection 63 of moves along the inclined surface 61,
The rotation angle required to press the ring portion 58 and separate it from the main portion 57 becomes large. Also, the angle α is 6
If it is larger than 0 degree, the resistance force when the cut bridge remaining portion 66 moves along the inclined surface 61 becomes large, and it becomes difficult to open the plug.

In the container 70, a male screw 71 is formed on the outer periphery of the upper portion of the mouth 70a, a bulging step portion 72 that bulges in an annular shape is formed below the male screw 71, and the neck of the container below it. A flange 73 is formed. Further this container 7
At 0, a plurality of locking claws 74 are provided below the bulging stepped portion 72 via the reduced diameter portion 75 at intervals in the circumferential direction. These locking claws 74 are formed such that the contact surface on the side that contacts the side surface of the locking projection 60 when the cap 50 is opened is formed into a substantially vertical surface, and the opposite surface has a protruding height toward the corresponding contact surface. The slope is gradually increased.

From the lower end of the bulging step portion 72 of the container 70 to the locking claw 7
4 Length to the upper end, that is, the length of the reduced diameter portion 75 is 3.0 m
m or more, preferably about 3.0 to 10 mm.
When the length of the reduced diameter portion 75 is 3.0 mm or more, when the metal cap is wound around the container 70 and attached,
It becomes easy to roll up the lower end of the metal cap around the lower end of the bulging stepped portion 72 of the container 70 by a forming roller to form the metal cap.

In this embodiment, the TE ring portion 58 is provided with eight locking projections 60, and the bulging step portion 72 of the container 70 is provided.
It has a ratchet structure in which four locking claws 74 are provided in the lower portion. The number of the locking projections 60 and the locking claws 74 is not limited to this example, and one or a plurality of the locking claws 74 and a plurality of the locking projections 60 may be used. .
In order to set A. to 90 degrees or less, preferably 45 degrees or less, it is desirable to provide four or more, preferably eight or more, locking projections 60 when the container 70 is provided with four locking claws 74. . Further, in this embodiment, eight retardation preventing projections 62 and locking projections 63 are arranged in the circumferential direction, but the number is not limited to this embodiment.

A method of using the closing device according to this embodiment will be described. After the container 70 is filled with the desired content liquid,
The cap 50 is conveyed to a cap mounting device (not shown), supports the lower surface of the flange 73, and is preferably conveyed in a suspended state, while the cap 50 is screwed and fitted into the mouth portion 70a thereof.
Attach and seal.

When the cap 50 is attached to the container opening 70a, the locking projection 60 of the TE ring portion 58 has an inner diameter larger than the outer diameters of the male screw 71 and the bulging step 72 of the container opening 70a. Since the TE ring portion 58 is set to be large, the TE ring portion 58 can easily pass through the outer circumference of the container mouth portion 70a.
As the male screw 71 of the container 70 and the screw portion 59 of the cap 50 are screw-fitted in the closing direction, the TE ring portion 58 moves downward and moves to the position of the locking claw 74 of the container 70. At this time, as shown in FIG. 5, the slow-moving preventing means 64 causes the engaging projection 63 to abut against the side wall 62a of the slow-moving preventing projection 62 in the plugging direction, so that the TE ring portion is rotated when the cap main portion 58 rotates in the plugging direction. The rotation of 58 does not slow down and works in unison with each other so that the locking projection 60 of the cap 50 is locked by the locking claw 7.
You can get over four. Therefore, when the cap is mounted, the locking projection 60 of the cap 50 is locked by the locking claw 7 of the container 70.
The TE ring portion 58 is delayed with respect to the rotation of the main portion 57 due to the resistance when overcoming the bridge 55.
It is possible to prevent an excessive force from being applied to (X), 55 (Y), and prevent the inconvenience that the bridges 55 (X), 55 (Y) are cut when the cap 50 is attached.

A cap 50 attached to the container opening 70a
As shown in FIG. 1, the lower end of the locking protrusion 60 has the locking claw 7
4 is tightened in a state where it reaches near the lower part. Further, the upper end and the outer peripheral surface of the container mouth portion 70 a are liner 5 made of a soft resin provided on the inner surface of the top plate portion 51 of the cap 50.
4 against which the container 70 is sealed.

When the cap 50 attached to the container opening 70a is turned in the opening direction to open the cap 50 of the closing device, the side surfaces of the locking projections 60 are locked by a slight rotational movement. It abuts against the abutment surface of 74 to prevent the TE ring portion 58 from rotating in the opening direction.

Since the main portion 57 of the cap 50 is rotated in the opening direction and the TE ring portion 58 is prevented from rotating, a plurality of thin bridges 55 (connecting the main portion 57 and the TE ring portion 58) are formed. X) and 55 (Y) are rapidly pulled in the lateral direction as the main portion 57 rotates, and as a result, the bridge 55 (Y) having a weak cutting strength is cut as shown in FIG. The bridge 55X is not disconnected when the bridge 55 (Y) is disconnected. The bridge 55 (X) having a high cutting strength is cut a little later than the cutting of the bridge 55 (Y) having a weak cutting strength, and as a result, the TE ring portion 58 is separated from the main portion 57 of the cap 50. . When these bridges 55 (X), 55 (Y) are cut, the container mouth 70a
The liner 54 is in contact with the upper end and the outer peripheral surface in the vicinity of the upper end, so that the container 70 is kept sealed. By thus disposing the bridges 55 (X) and 55 (Y) having different cutting strengths, the bridge 55 having a weak cutting strength can be obtained.
(Y) and the bridge 55 (X) having a high cutting strength can be shifted in the cutting timing, and all the bridges have the same cutting strength, and the opening torque at the time of cutting the bridge is greater than the case where all the bridges are cut at the same time. Can be reduced.

Subsequent to the cutting of the bridges 55X and 55Y, as shown in FIGS. 7 to 9, the bridge remaining portion 66 disposed on the opening direction side of the slow-moving prevention projection 62 is provided with the slow-moving prevention projection 6.
2 is contacted with the inclined surface 61, moves along the inclination, and
By pressing the E ring portion 58 in a direction of separating it from the main portion 57, the bridges 55 (X) and 55 (Y) are cut and the TE ring portion 58 separated from the main portion 57 is surely fixed to the main portion 5.
Can be separated from 7. As a result, cap 5
The TE ring portion 58 separated from the main portion 57 of 0 is separated below the main portion 57, and it can be recognized at a glance that the TE ring portion 58 is opened.

When the main portion 57 of the cap 50 is further rotated in the opening direction, the liner 54 is separated from the upper end of the container mouth portion 70a and the outer peripheral surface near the upper end, the hermetic seal of the container 70 is released, and the main portion 57 is further opened. Turn to remove from container opening 70a.

In the closing device of this embodiment, a large number of locking projections 60 are provided on the inner peripheral surface of the TE ring portion 58 of the cap 50 along the circumferential direction, and a plurality of engaging projections are provided below the bulging step portion 72 of the container 70. When the stopper 50 is provided and the cap 50 mounted on the container opening 70a is rotated in the opening direction, the locking projection 60 abuts and engages with the locking claw 74 to prevent the TE ring portion 58 from rotating. As a result, the rotational force that rotates the cap 50 in the opening direction directly acts on the bridges 55 (X), 55 (Y), and the bridges 55 (X), 55 (Y).
Can be easily cut. Further, in this embodiment, the container mouth portion 7
Since the four locking claws 74 are arranged at a distance from 0a and the many locking projections 60 are arranged on the inner wall of the TE ring portion 58 of the cap 50, the bridge 55 (X), 55 (Y) can be easily cut. Therefore, according to the closing device of this embodiment, the cap 50 attached to the container opening 70a is rotated in the opening direction, and rotation is performed until all the bridges 55 (X) and 55 (Y) are cut. It is possible to reduce the bridge cutting angle (BBA), which is an angle, to 90 degrees or less, preferably 45 degrees or less.

Further, in this embodiment, the cap 50 is formed so as to project downward from the lower end of the main portion 57 and has a delay preventing projection 62 having an inclined surface 61 which gradually decreases the projecting height in the opening direction, and a delay preventing projection 62. A delay preventing means 64 including an engagement protrusion 63 disposed close to the closing direction side of the movement preventing protrusion 62 is provided, and the bridge 5 is arranged close to the opening preventing direction of the delay preventing protrusion 62.
5 (X) is placed, and when the cap 50 is put on the container opening 70a and rotated in the closing direction, the engaging projection 63 abuts on the side surface 62a of the delay prevention projection 62 on the closing direction and the container opening 70a. When the cap 50 attached to 70a is rotated in the opening direction, the remaining portion 66 of the cut bridge 55 (X) moves along the inclined surface 61 of the delay prevention protrusion 62, and as a result, TE
The ring portion 58 is pressed downward to be forcibly separated from the main portion 57, and the TE ring portion 58 is separated from the main portion 57, whereby the cap 50 can be reliably opened.

It is needless to say that the above-mentioned embodiment illustrates the closing device of the present invention, and various modifications can be made. For example, in the above-described embodiment, the liner is arranged on the inner surface of the top plate portion 51 of the cap body 53, but a ridge or the like is provided on the inner surface side of the top plate portion for contacting the upper end of the container mouth to provide airtightness. A linerless cap without a liner may be used. Further, in the above-mentioned embodiment, the container 70 is made of a plastic such as PET, but it can be configured as a glass container and a container without the flange 73 may be used. Further, the container 70 used in the closing device of the above-described embodiment is configured such that the locking claw 74 is provided below the bulging step portion 72 via the reduced diameter portion 75, and the reduced diameter portion 75 has an interval of 3 mm or more. When the metal cap is mounted in place of the synthetic resin cap 50, the diameter is reduced to 75 to form a cap with a forming roller or the like, particularly, the lower end of the TE ring portion 98. Since the roll-up molding can be easily performed, the container 70 can be used as both the synthetic resin cap 50 and the metal cap. Further, in the synthetic resin cap 50 according to the present invention, a vertical score is provided on the TE ring portion 58 so that the bridges 55 (X), 55 can be opened when the cap is opened.
The vertical score may be cut at substantially the same time as or immediately after the cutting of (Y) so that the TE ring portion 58 can be removed in a band shape.

[0038]

As described above, in the closing device of the present invention, a large number of locking projections are provided on the inner peripheral surface of the TE ring portion of the cap along the circumferential direction, and a plurality of engaging projections are provided below the bulging step portion of the container. When the stopper claw is provided and the cap attached to the container mouth is rotated in the opening direction, the locking projection abuts and engages with the locking claw to prevent rotation of the TE ring part, resulting in opening of the cap. The rotating force rotating in the plug direction directly acts on the bridge, and the bridge is easily cut. Further, by disposing a plurality of locking claws at intervals in the container opening and disposing a large number of locking projections on the inner wall of the TE ring portion of the cap, the bridge can be easily cut at a small rotation angle. Therefore, according to the present invention, the cap attached to the container mouth is rotated in the opening direction, and the bridge cutting angle (BBAA), which is the rotation angle up to the position where the bridge is cut, is 90 degrees or less, Desirably, it can be made as small as 45 degrees or less, and a closing device having excellent tamper evidence can be provided.

Further, in the present invention, at least one of the plurality of bridges of the cap has a cutting strength weaker than the cutting strength of the other bridges, so that the cap attached to the container mouth is opened. When the bridge is cut by turning the lock in the direction to engage the locking claws of the container and the locking projections of the cap, the bridge with weakened cutting strength is cut first, and then the other bridges are cut. Therefore, it is possible to shift the cutting timing between the bridge with weak cutting strength and other bridges, and it is possible to reduce the opening torque at the time of cutting the bridge compared to the case where all bridges have the same cutting strength, Easy to open.

Further, the synthetic resin cap according to the present invention includes a retardation preventing projection which is formed so as to project downward from the lower end portion of the cap main portion and has an inclined surface which gradually reduces the projecting height in the opening direction. Provided with an anti-slip means which is close to the side surface of the anti-slow-prevention projection in the direction of closure and which is provided partially or wholly on the TE ring portion side, and which has an anti-slow means. By arranging the bridge close to the side of the opening direction of the container, the synthetic resin cap is covered on the container mouth, and when it is screwed by turning in the closing direction, the engagement protrusion is the stopper of the delay prevention protrusion. When the cap is tightened, extra force is applied to the bridge by contacting the side surface of the direction and interlocking with the rotation of the TE ring part in the closing direction of the cap main part without delaying the rotation of the TE ring part. Can be installed without In, it is possible to reliably prevent the disadvantage that the bridge is cut during cap installation. Further, when the cap attached to the container mouth is rotated in the opening direction, the cut bridge remaining part moves along the inclined surface of the delay prevention protrusion, and as a result, the TE ring part is pressed downward. , The TE ring portion is forcibly separated from the main portion, and the cap opening indication can be ensured by the separation of the TE ring portion from the main portion.

[Brief description of drawings]

FIG. 1 is a front sectional view of a closing device showing a first embodiment of the present invention.

FIG. 2 shows the same closing device and is a sectional view taken along line AA in FIG.

FIG. 3 is a perspective view of the cap of the same closure device.

FIG. 4 is a view showing a delay preventing means of the same cap.
It is a middle BB section arrow line view.

FIG. 5 is a view showing the retardation preventing means also in the state of closing the plug.

FIG. 6 is a view showing a state in which a weak bridge is cut at the same site at the start of opening the plug.

FIG. 7 is a view showing the retardation preventing means in a state immediately before the TE ring is separated by similarly opening the plug.

FIG. 8 is a view showing a delay preventing means in a state where the TE ring is separated by similarly opening the plug.

FIG. 9 is a view showing the retardation preventing means in a state where the TE ring is also separated by similarly opening the plug.

FIG. 10 is a perspective view showing an example of a conventional closing device.

FIG. 11 is a partially sectional front view showing another example of the conventional closing device.

FIG. 12 is a perspective view of a main part of the closing device shown in FIG. 11.

[Explanation of symbols]

50 ... Cap, 51 ... Top plate part, 52 ... Cylinder part, 5
3 ... Cap body, 54 ... Liner, 55 (X),
55 (Y) ... Bridge, 56 ... Horizontal score, 57 ...
… Main part, 58 …… TE ring part, 59 …… Screw part, 60
...... Locking projection, 61 ...... Sloping surface, 62 ...... Slowing prevention projection, 63 ...... Engaging projection, 64 ...... Slowing prevention projection, 70 ...
… Container, 70a… Container opening, 71… Male screw, 72…
... Bulging step, 73 ... Flange, 74 ... Locking claw.

Claims (14)

[Claims] 1. A container in which a threaded portion is formed on the outer periphery of a mouth portion, and a bulging step portion that bulges radially outward in a radial direction is formed below the threaded portion, and a container is suspended from a top plate portion and its peripheral edge. And a tamper-evidence ring part formed by a horizontal score to leave a plurality of bridges in the lower part of the cylinder part, and the threaded part of the container is formed on the inner wall surface of the main part. In a closing device provided with a synthetic resin cap provided with a screw part to be screwed, one or a plurality of them are spaced apart along a circumferential direction below a bulging step part of the container via a reduced diameter part. Is provided on the inner wall surface of the tamper evidence ring part of the synthetic resin cap, and the locking claw is provided when the synthetic resin cap mounted on the container mouth is rotated in the opening direction. Is provided with a plurality of locking protrusions for engaging with A closing device characterized in that at least one of the ridges has a breaking strength lower than that of the other bridges. 2. The closing device according to claim 1, wherein the cutting strength of the plurality of bridges is three or more. 3. A retardation preventing projection having an inclined surface which is formed so as to protrude downward from the lower end portion of the main portion of the synthetic resin cap, and which gradually decreases the protrusion height in the opening direction, and the retardation preventing projection. Is provided in the closing direction of the tamper-evidence ring portion, and a part of or all of the engaging projection is provided on the side of the tamper evidence ring. The closing device according to claim 1 or 2, characterized in that a bridge is arranged close to the side. 4. The engagement projection of the delay prevention means is a projection arranged at the upper end of the tamper evidence ring portion, one surface of which is arranged close to the side surface of the delay prevention projection in the closing direction, or the cap main portion and the tamper. The projection provided on the boundary with the evidence ring portion, and a part of which is cut by a horizontal score so as to be interlocked with the tamper evidence ring portion, and is one of the projections. Closure device. 5. The angle of the inclined surface of the retardation preventing projection is 15 to 6.
The range of 0 degrees is set in the range of 0 or 3.
Closure device. 6. The tamper-evidence ring portion of the cap is provided with a vertical score that opens the tamper-evidence ring portion in a band shape at substantially the same time as or immediately after cutting the bridge. 1
The closure device according to any one of 5 to 5. 7. The closing device according to claim 1, wherein the length from the lower end of the bulging step portion of the container to the upper end of the locking claw is 3.0 mm or more. 8. The bridge cutting angle, which is the rotation angle up to the position where the bridge is cut by rotating the cap attached to the container mouth in the opening direction, is 90 degrees or less. Closure device according to any one of 7 to 7. 9. A threaded portion is formed on the outer periphery of the mouth portion, and one or a plurality of locking claws spaced apart along the circumferential direction is provided below the threaded portion and screwed into the mouth portion of the container. A tamper-evidence ring part that is a synthetic resin cap to be fitted and that has a top plate part and a tubular part that hangs from the periphery thereof, and that is divided from the main part by a horizontal score leaving a plurality of bridges at the bottom of the tubular part. And a screw part that is screwed into the screw part of the container is provided on the inner wall surface of the main part, and is attached to the container mouth part on the inner wall surface of the tamper evidence ring part. Further, when the synthetic resin cap is rotated in the opening direction, a plurality of locking projections that engage with the locking claws are provided, and at least one of the plurality of bridges has a cutting strength of cutting other bridges. Formed with weaker strength than strength A cap made of synthetic resin. 10. The synthetic resin cap according to claim 9, wherein the cutting strength of the plurality of bridges is three or more. 11. A retardation preventing projection having an inclined surface which is formed so as to project downward from the lower end of the main portion of the cap main body and whose projecting height gradually decreases toward the opening direction, and a closing direction of the retardation preventing projection. A delay preventing means is provided which is close to the side surface and has an engaging projection provided so as to be partially or wholly located on the tamper evidence ring portion side, and the bridge is provided on the opening direction side of the delay preventing projection. The cap made of synthetic resin according to claim 9 or 10, characterized in that 12. An engagement projection of a delay prevention means is a projection arranged at the upper end of the tamper evidence ring portion, one surface of which is arranged close to the side surface of the delay prevention projection in the closing direction, or the cap main portion and the tamper. The projection provided on the boundary with the evidence ring portion, and a part of which is cut by a horizontal score so as to interlock with the tamper evidence ring portion, and is formed.
Synthetic resin cap. 13. The angle of the inclined surface of the anti-slow protrusion is 15 to 15.
The synthetic resin cap according to claim 11 or 12, wherein the cap is in the range of 60 degrees. 14. The tamper-evidence ring portion of the cap is provided with a vertical score that opens the tamper-evidence ring portion in a band shape at substantially the same time as or immediately after the bridge is cut. Item 15. The synthetic resin cap according to any one of items 9 to 13.