JP3447406B2 - Closing device and synthetic resin cap - Google Patents

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 that is separated from the main part of the cap and has a tamper-evidence 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. 6 shows, as an example of a conventional closing device, a closing device consisting 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 peripheral edge of the top portion and having a screw 5 on the inside thereof, and a reverse portion of the container check projection 14 and the cap check projection 8 when the cap body 2 is rotated in the opening direction. A cap 1 provided with a bridge 6 that is broken by a stopping force and an annular body 7 that is partitioned from the cap body 2 by the bridge 6, and a male screw 13 is formed in the mouth 12 so that the cap 1 is mounted. In addition, there is described a closing device including the container 11 in which the container check projection 14 is formed on the lower portion of the male screw 13. 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 engages with the container check projection 14 provided on the container 11, The rotation of the ring-shaped body 7 is prevented by this, the bridge 6 is cut, and the ring-shaped body 7 is separated from the cap body 2.

FIG. 7 shows a synthetic resin container lid (cap) disclosed in Japanese Examined Patent Publication No. 1-30702 as another example of the conventional closing device.
A container having a container opening 30 in which a jaw 32 provided below the male screw 31 is formed, and a cap 20 attached to the container are described. This cap 20
Is provided with a top plate portion 21 and a tubular portion 22 that hangs down from the peripheral portion thereof, and the tubular portion 22 has a plurality of slits 23 extending in the circumferential direction and a break defined by a bridge 24 existing between the slits. A line 25 is formed, and the tubular portion 22 is divided into a main portion 26 above the breaking line 25 and a pill fur proof hem portion 27 below the breaking line, and the container mouth portion 30 is formed on the inner surface of the main portion 26. Is formed with a screw portion 28 that is screwed into the male screw 31 of the pill fur proof, and a plurality of protrusions 2 that protrude inward in the radial direction are formed on the inner surface of the pill fur proof hem portion 27.
9 is formed at a position apart from the bridge 24. As shown in FIG. 8, 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. Further, the above-described closing device has a drawback that the cap 1 and the container mouth are unique in shape, and it is difficult to apply the cap to a general synthetic resin cap or a 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 should be increased, or the breaking line 2 as shown by reference numerals 34 and 35 in FIG.
5. Engagement pieces are provided above and below the bridge 5, and the bridge 2
It is conceivable to prevent 4 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.

[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 a synthetic resin provided with a threaded portion to be screwed into the threaded portion of the container on the inner surface of the tubular portion, below the bulging step portion of the container. One or a plurality of locking claws are provided spaced apart along the circumferential direction via the reduced diameter portion, and the TE ring is formed on the inner wall surface of the TE ring portion of the synthetic resin cap from the lower end portion of the main portion. Tilt toward the cap opening direction from the base end that extends to the lower end A plurality of locking protrusions formed in a plate shape and separated from the main portion side by a horizontal score are provided at intervals along the circumferential direction, and on the main portion side adjacent to the tips of the locking protrusions. , A bridge protector is provided which engages with the locking projection when the TE ring part is slower than the main part when the cap body is rotated in the closing direction. The locking claw and the locking projection are engaged with each other when the cap is attached to the portion and the cap is rotated in the opening direction.

In this closing device, the locking claw of the container is
When the synthetic resin cap is attached to the mouth of the container and turned in the opening direction, the surface opposite to the contact surface that engages with the locking projection of the cap is gradually projected toward the corresponding contact surface. Good as an increasing slope. In this closing device, the bridge protection portion may have a hook portion that engages with a part of the locking projection defined by the horizontal score on the TE ring portion side. In this closing device, the bridge protection portions may be provided so as to correspond to the respective locking projections one to one. In this closing device, the inner wall surface of the TE ring portion of the cap may be provided with a recess for accommodating the locking projection when the tip of the locking projection is tilted radially outward. In this closure device, the TE of the cap
The ring portion may be provided with a vertical score for opening the TE ring portion in a band shape. In this closing device, 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 according to the present invention, it is desirable that the cap attached to the container opening is rotated in the opening direction and the bridge breaking angle, which is the rotation angle up to the position where the bridge is cut, is 90 degrees or less.

The synthetic resin cap according to the present invention comprises a top plate portion and a tubular portion hanging from the peripheral edge thereof, and a TE is divided from the main portion by a horizontal score leaving a plurality of bridges at the lower portion of the tubular portion. A synthetic resin cap having a ring portion and an inner wall surface of the main portion provided with a screw portion to be screwed into the screw portion of the container, wherein the inner wall surface of the TE ring portion has a lower end portion of the main portion. From the base end extending from the TE ring to the lower end of the TE ring, a plurality of locking protrusions formed in a plate shape inclined toward the cap opening direction and separated from the main part by the horizontal score are provided along the circumferential direction. When the TE ring is slower than the main part when the cap body is rotated in the closing direction on the main part side which is provided separately from each other and is adjacent to the tip of the locking projection, A matching bridge protector is provided It become one.

In this synthetic resin cap, the bridge protecting portion may have a hook portion that engages with a part of the locking projection defined by the horizontal score on the TE ring portion side. In this synthetic resin cap, the bridge protection portions may be provided in a one-to-one correspondence with the respective locking protrusions. In this synthetic resin cap, a recess may be provided on the inner wall surface of the TE ring portion for accommodating the locking projection when the locking projection is tilted outward in the radial direction. In this synthetic resin cap, the TE ring portion may be provided with a vertical score for opening the TE ring portion in a band shape.

[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. On the inner wall surface of the portion, a plate-like member is formed to project from a base end portion extending from the lower end portion of the main portion to the lower end portion of the TE ring portion toward the cap opening direction side, and separated from the main portion side by a horizontal score. When a plurality of locking protrusions are provided along the circumferential direction with a synthetic resin cap provided at a distance from each other, the synthetic resin cap is attached to the mouth of the container, and the cap is rotated in the opening direction. The locking claw and the locking projection are engaged with each other, the rotation of the TE ring portion is blocked, and as a result, the rotational force that rotates 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 synthetic resin cap, or By arranging a large number of locking projections on the inner wall of the TE ring part of the cap, the force can be uniformly applied to a plurality of bridges, the bridges can be easily cut, and the caps are 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, the synthetic resin cap according to the present invention is provided on the inner wall surface of the TE ring portion from the lower end of the main portion to the TE.
A plurality of locking protrusions formed in a plate shape inclined from the base end extending to the lower end of the ring portion toward the cap opening direction and separated from the main portion by a horizontal score are arranged along the circumferential direction with a space. When the cap body is rotated in the closing direction, the main body side adjacent to the tip of the locking protrusion is T
Since the bridge protection portion that engages with the locking projection is provided when the E-ring portion is slower than the main portion, the synthetic resin cap is put on the mouth portion of the container provided with the locking claw. In the case of screw-fitting and mounting, the locking projection of the cap abuts on the locking claw of the container, and the tip is pushed outward to get over the locking claw. Further, even when the TE ring part is delayed from the main part when the cap main body is rotated in the closing direction due to the resistance when the locking projection gets over the locking claw, the bridge protection part arranged on the main part side of the cap main body. The locking projection engages with and prevents the TE ring portion from further delaying, thereby preventing an excessive force from being applied to the bridge.

[0017]

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 is divided into a main portion 57 above the horizontal score 56 and a TE ring portion 58 below the horizontal score 56 by a horizontal score 56, leaving a plurality of thin bridges 55. On the inner wall surface of the main portion 57, the male screw 7 formed on the outer periphery of the mouth portion of the container 70.
A threaded portion 59 that is screwed with 1 is formed. Also, TE
On the inner wall surface of the ring portion 58, a base end portion 60a that extends substantially vertically from the lower end portion of the main portion 57 to the lower end portion of the TE ring portion 58 is formed in a plate shape that is inclined toward the cap opening direction,
In addition, as shown in FIG.
A large number of locking projections 60 separated from the side are provided along the circumferential direction. As shown in FIG. 4, the horizontal score 56 completely separates the main portion 57 side and the TE ring portion 58 side of the locking projection 60, and the leader formed to project from the main portion 57 side and the TE ring portion 58 side. 55a is formed so as to be cut to a predetermined depth, and the uncut portion of the leader 55a is a bridge 55.

Further, the TE ring portion 58 has a locking projection 6
When the 0 is pushed outward in the radial direction, its locking projection 60
A recess 61 is provided in the inner wall portion of the TE ring portion 58 at a position opposite to the recess 60 such that the locking projection 60 is housed therein, and the locking projection 60 bent outward in the radial direction is housed therein. It smoothly passes through the bulging step portion 72 of the container 70, and in addition, when the locking projection 60 gets over the locking claw 74 when the cap is closed, it is easily pushed and bent outward in the radial direction.

The thickness and the protruding length of the locking projection 60 are such that the locking projection 60 abuts on the locking claw 74 of the container 70 when the cap is closed, and the locking claw 74 is pressed and bent outward in the radial direction.
The degree of flexibility is such that the cap can be overcome, and when the cap is opened, the locking claw 74 engages with the one side surface 60b and is not easily deformed when rotated in the opening direction, so that the engagement state is reliably maintained. The mechanical strength is not particularly limited as long as it has a mechanical strength that can prevent the TE ring portion 58 from rotating in the cap opening direction, but the thickness is preferably 0.2 to 5 mm and the protruding length is about 1 to 10 mm. Further, the inclination angle α of the locking projection 60 shown in FIG.
The angle is preferably 2 to 90 degrees, more preferably 5 to 45 degrees.

On the side of the main portion 57 adjacent to the tip 60d of the locking projection 60, the cap body 53 is provided with the container mouth portion 70a.
When the TE ring portion 58 is delayed relative to the main portion 57 when the TE ring portion 58 is slid and fitted by being rotated over the cover in the closing direction, the locking projection 60
Is provided with a bridge protector 62. The bridge protection portion 62 has a hook portion 62a that engages with the main portion 57 side and a portion of the TE ring portion 58 side of the locking projection 60 that is partitioned by the horizontal score 56, and locks the cap 50. When the mouth 70a of the container 70 provided with the claws 74 is covered and screwed and fitted, the locking projection 60 of the cap 50 abuts the locking claw 74 of the container 70 and the tip 60d.
Even when the TE ring portion 58 is delayed relative to the main portion 57 due to the resistance when overcoming the locking claw 74 while being pushed outwards, the hook portion 62a of the bridge protection portion 62 is
The tip 60d of the locking projection 60 is engaged with the TE ring portion 5
This is to prevent further delay of 8 and prevent an excessive force from being applied to the bridge 55. It should be noted that in this embodiment, the hook portion 62 extends from one end of the bridge protection portion 62.
Although a has a shape in which a is bent at an angle of about 90 degrees and extends outward in the radial direction, the bending angle of the hook portion 62a is not limited to this and is 60 to 120 degrees, preferably 75 to. It may be set appropriately from the range of 105 degrees. Further, the shape of the hook portion 62a is not limited to this example, and the locking projection 60
The tip 60d may be curved, stepped, fishhook, or any other shape.

In the container 70, a male screw 71 is formed on the outer periphery of the upper portion of the mouth 70a, a bulging stepped portion 72 that bulges in an annular shape is formed below the male screw 71, and the neck of the container below it is formed. 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. In these locking claws 74, the contact surface 74a on the side with which one side surface 60b of the locking projection 60 contacts when the cap 50 is opened is formed into a substantially vertical surface, and the opposite surface thereof is the corresponding contact surface 74a.
It is an inclined surface 74b whose projection height is gradually increased toward.

From the lower end of the bulging step 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, a large number of locking projections 60 (16 in FIG. 2) are provided on the TE ring portion 58, and four locking claws 74 are provided below the bulging step portion 72 of the container 70. It has a ratchet structure. These locking protrusions 6
The number of 0 and the number of the locking claws 74 are not limited to this example, and one or a plurality of the locking claws 74 and a plurality of the locking protrusions 60 may be used. In order to set it 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 four locking claws 74 are provided on the container 70. Further, in this embodiment, the locking projection 60 and the bridge protection portion 62 adjacent to the locking projection 60 are provided.
The ratio of 1 to 1, that is, the structure in which one bridge protection portion 62 is provided for each locking projection 60,
The relationship between 0 and the number of bridge protection units 62 is not limited to this,
For example, the number of the bridge protection portions 62 may be smaller than the number of the locking protrusions 60.

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, the other side surface 60c of the locking projection 60 comes into contact with the inclined surface 74b of the locking claw 74, and the locking projection 60 is pushed outward in the radial direction while riding over the protruding end of the locking claw 74. Since the recess 61 is provided on the inner wall surface of the TE ring portion 58 on the side where the locking projection 60 is pressed and bent, the locking projection 60 is pressed and bent by the locking claw 74 so that the one side surface 60b side contacts the recess 61. It is possible to get over the projecting end of the locking claw 74.

Further, when the locking projection 60 of the cap 50 abuts on the locking claw 74 of the container 70 and the tip of the cap 50 is pushed outwards and gets over the locking claw 74, its resistance causes the TE ring portion 58 to move. Even if the TE ring portion 58 is slower than the main portion 57, the tip end 60d of the locking projection 60 engages with the hook portion 62a of the bridge protection portion 62 arranged on the main portion 57 side of the cap main body 53, and the TE ring portion 58 is further extended. Delay is prevented. As a result, it is possible to prevent an excessive force from being applied to the bridge 55 due to the resistance when the locking projection 60 gets over the locking claw 74, and prevent the inconvenience that the bridge 55 is cut when the cap 50 is mounted. it can.

A cap 50 attached to the container opening 70a
As shown in FIGS. 1 and 2, the winding is fastened with the lower end of the locking projection 60 reaching the vicinity of the lower portion of the locking claw 74. The locking projection 60 is erected so that its tip is brought into contact with the contact surface 74 a of the locking claw 74. Also, the container mouth 70a
The upper end and the outer peripheral surface of the cap 50 are pressed against a liner 54 made of a soft resin provided on the inner surface of the top plate portion 51 of the cap 50,
Thereby, 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, each locking projection 60 is engaged with one side surface 60b by a slight rotational movement. It abuts against the abutment surface 74a of the stop pawl 74 and prevents 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, the plurality of thin bridges 55 connecting the main portion 57 and the TE ring portion 58 are As the main part 57 rotates, the main part 57 is rapidly pulled in the lateral direction and immediately cut. As a result, cap 5
The TE ring portion 58 is separated from the 0 main portion 57. When the bridge 55 is cut, the liner 54 is in contact with the upper end of the container opening 70a and the outer peripheral surface near the upper end, so that the container 70 is maintained hermetically sealed.

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 opening 70a and the outer peripheral surface near the upper end, and the hermetic seal of the container 70 is released. Turn to remove from container opening 70a.

In the closing device of this embodiment, the TE ring portion 58 of the cap 50 is provided with a base end portion 60a extending substantially vertically from the lower end portion of the main portion 57 to the lower end portion of the TE ring portion 58.
The tip portion is formed in a plate shape in which the tip is inclined toward the cap opening direction side rather than the radially inner side, and the main portion 57 is formed by the horizontal score 56.
A large number of locking projections 60 separated from the side are provided along the circumferential direction, a plurality of locking claws 74 are provided below the bulging step portion 72 of the container 70, and the cap 50 attached to the container opening portion 70a is provided. Side surface 6 of the locking projection 60 when turning the
0b comes into contact with and engages with the contact surface 74a of the locking claw 74, and TE
Rotation of the ring portion 58 is prevented, and as a result, the cap 50
The rotating force that turns the plug in the opening direction directly acts on the bridge 55,
The bridge 55 is easily disconnected. Furthermore, in the present embodiment, the four locking claws 74 are arranged at intervals in the container opening 70a, and a large number of locking projections 60 are arranged on the inner wall of the TE ring portion 58 of the cap 50. The force can be uniformly applied to the bridge 55 of
The bridge 55 can be easily cut with a small rotation angle. Therefore, according to the closing device of this embodiment, the container mouth 70a
Rotate the cap 50 attached to the plug in the opening direction so that the bridge cutting angle (BBA), which is the rotation angle up to the position where the bridge 55 is cut, is 90 degrees or less, preferably 45 degrees.
It becomes possible to make it as small as or below.

Further, the synthetic resin cap 5 in this embodiment is used.
0 is formed on the inner wall surface of the TE ring portion 58 so as to project in a plate shape that is inclined toward the cap opening direction from the base end portion 60a extending from the lower end portion of the main portion 57 to the lower end portion of the TE ring portion 58 as described above. A plurality of locking projections 60, which are separated from the main portion 57 side by the horizontal score 56, are arranged in the circumferential direction at a distance from each other, and tips 60d of the locking projections 60 are arranged.
On the side of the main part 57 adjacent to the bridge protection part 6 which engages with the locking projection 60 when the TE ring part 58 is slower than the main part 57 when the cap body 53 is rotated in the closing direction.
Since the cap 50 is covered with the mouth 70a of the container 70 provided with the locking claws 74 and is screwed and fitted, the locking projection 60 of the cap 50 can be attached to the container 70. Of the cap main body 53 even when the TE ring portion 58 is delayed from the main portion 57 due to the resistance at that time when the TE claw portion 58 abuts on the locking claw 74 and pushes the tip 60d outward and is bent. The locking projection 60 is engaged with the bridge protection portion 62 arranged on the main portion 57 side, and further delay of the TE ring portion 58 is prevented, and an excessive force is prevented from being applied to the bridge, so that the cap 50 is secured. Bridge 55 when installing
The inconvenience of being cut off can be prevented.

FIG. 5 shows a second embodiment of the present invention. The closure device according to this embodiment is configured with substantially the same components as the closure device in the previous embodiment. In this embodiment, the TE ring portion 58 of the cap 50 is provided with this TE.
Vertical score 8 for opening ring portion 58 in a band shape
1 is provided. The vertical score 81 in this embodiment is connected to the horizontal score 56. The bridges 55 located on both sides of the vertical score 81 among the plurality of bridges 55 may be formed thicker than the other bridges 55.

In the closing device according to this embodiment, as in the previous embodiment, the cap 50 can be attached to the container opening 70a to open the cap 50, and the TE ring portion 58 is provided with the vertical score 81. As a result, the locking projection 6 is opened when the plug is opened.
The one side surface 60b of 0 abuts on the abutment surface 74a of the locking claw 74 to prevent the TE ring portion 58 from rotating, so that the TE portion 57 and the TE portion
The bridge 55 that connects the ring portion 58 is cut, and the TE ring portion 58 is opened from the vertical score 81 into a band shape by cutting the bridge 55 and cut from the main portion 57 of the cap 50.

In the closing device of this embodiment, the TE ring portion 58 is provided with the vertical score 81, and the TE ring portion 58 is opened like a band when the cap is opened.
The ring portion 58 can be easily removed from the container mouth portion 70a, and the unsealing indication is further clarified, so that the tamper evidence of the closing device can be further improved. Further, since the TE ring portion 58 does not remain in the container mouth portion 70a and can be removed together with the cap 50, the container 70 and the cap 50 including the TE ring portion 58 can be easily separated even after use, and the container 70 It becomes easy to discard and reprocess the cap 50 and the cap 50.

In this embodiment, the horizontal score 56 of the cap 50 is partially formed as a wide bridge without being formed over the entire circumference in the circumferential direction of the cap, and the vertical score 81 or adjacent to one end of the wide bridge. A configuration in which a vertical weakening line is provided may be used. Here, the vertical weakening line has a structure in which the TE ring portion 58 is cut in the vertical direction while leaving an uncut portion that serves as a vertical bridge in the center or the end portion, or a thin connecting portion remains in the TE ring portion 58. As shown in FIG. Also,
When forming the wide bridge, two vertical weakening lines may be provided so as to be adjacent to both ends thereof. By thus providing the two vertical weakening lines adjacent to both ends of the wide bridge, the TE ring portion 58 is opened by breaking one of the vertical weakening lines, and then the other vertical weakening line is left. It can be easily torn from the main part 57 of the cap 50 along the weakening line.

It is needless to say that each of the above-mentioned embodiments exemplifies the closing device of the present invention, and various modifications can be made. For example, in each of the above embodiments, the liner is arranged on the inner surface of the top plate portion 51 of the cap body 53. The linerless cap without the liner may be used. In addition, in each of the above-described embodiments, the container 70 is a plastic container such as PET, but it can be configured as a glass container and the flange 73 is used.
You may use a container without.

Further, the container 70 used in the closing device of the above-mentioned embodiment has a structure in which the locking claw 74 is provided below the bulging step portion 72 through the reduced diameter portion 75, and the interval between the reduced diameter portions 75. 3m
When the metal cap is mounted instead of the synthetic resin cap 50, the diameter is set to m or more, preferably 3 to 10 mm, and the reduced diameter portion 75 forms a cap by a forming roller or the like, particularly the lower end of the TE ring portion 98. Since the roll-in molding of the portion can be easily performed, this container 70
The synthetic resin cap 50 and the metal cap can be used interchangeably.

[0040]

As described above, according to the closing device of the present invention, the TE ring portion of the cap is attached to the TE ring portion from the lower end portion of the main portion.
From the base end that extends almost vertically to the lower end of the ring part, the tip is formed in a plate shape that is inclined toward the cap opening direction side rather than the radially inner side, and is separated from the main part side by a horizontal score. A large number of locking projections are provided along the circumferential direction, multiple locking claws are provided below the bulging step of the container, and the locking projections are provided when the cap attached to the container mouth is rotated in the opening direction. One side surface of the locking claw comes into contact with and engages with the abutment surface of the locking claw to prevent rotation of the TE ring portion. As a result, the rotating force that rotates the cap in the opening direction directly acts on the bridge, which facilitates the bridge. Be disconnected. Further, by disposing a plurality of locking projections and locking claws, it is possible to uniformly apply a force to the plurality of bridges, and the bridges can be easily cut at a small rotation angle. Therefore, according to the closing device of this embodiment, the cap attached to the container mouth is rotated in the opening direction, and the bridge cutting angle (BBA) is the rotation angle up to the position where the bridge is cut. Can be reduced to 90 degrees or less, preferably 45 degrees or less, and a closing device having excellent tamper evidence can be provided.

Further, the synthetic resin cap according to the present invention has a structure in which the TE ring portion is formed on the inner wall surface from the lower end portion of the main portion to TE.
A plurality of locking protrusions formed in a plate shape inclined from the base end extending to the lower end of the ring portion toward the cap opening direction and separated from the main portion by a horizontal score are arranged along the circumferential direction with a space. When the cap body is rotated in the closing direction, the main body side adjacent to the tip of the locking protrusion is T
When the E-ring part covers the synthetic resin cap of the main part over the mouth part of the container provided with the locking claws and is screwed and fitted, the locking projection of the cap contacts the locking claw of the container. While touching and pushing the tip outwards, it gets over the locking claw. In addition, a bridge protection part that engages with the locking protrusion when the TE ring part is slower than the main part when the cap body is rotated in the closing direction due to the resistance when the locking protrusion gets over the locking claw. Since the structure is provided, even if the TE ring part is delayed due to the resistance when the locking projection gets over the locking claw when the cap is closed, the bridge protection part arranged on the main part side of the cap body is engaged. It is possible to prevent the inconvenience that the bridge is cut off when the cap is attached by preventing the delaying of the TE ring portion from further engaging by the stop projection and preventing an excessive force from being applied to the bridge. .

[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 II-II in FIG.

FIG. 3 shows the same closing device and is a sectional view taken along line III-III in FIG. 1.

FIG. 4 is an enlarged perspective view of a main part of a cap of the closing device of the same closing device.

FIG. 5 is a front view of a main part of a closing device showing a second embodiment of the present invention.

FIG. 6 is a perspective view showing an example of a conventional closing device.

FIG. 7 is a partially sectional front view showing another example of the conventional closing device.

FIG. 8 is a perspective view of a main part of the closing device shown in FIG. 7.

[Explanation of symbols]

50 ... Cap, 51 ... Top plate part, 52 ... Cylinder part, 5
3 ... Cap body, 54 ... Liner, 55 ... Bridge, 56 ... Horizontal score, 57 ... Main part, 58 ... T
E-ring part (TE-ring part), 59 ... Screw part, 60 ...
... Locking projection, 60a ... Base end, 60d ... Tip, 62
...... Bridge protector, 62a ...... Hook part, 70 …… Container, 70a …… Container mouth part, 71 …… Male screw, 72 …… Swelling step part, 73 …… Flange, 74 …… Locking claw, 74a ...
... Abutting surface, 74b ... Sloping surface, 75 ... Reduced diameter portion, 81 ...
… Vertical score.

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B65D 41/34 B65D 55/02

Claims (13)

(57) [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 comprising a synthetic resin cap provided with a screw part to be screwed, one or a plurality of parts are arranged along a circumferential direction below a bulging step part of the container via a reduced diameter part. And a locking claw provided on the inner wall surface of the tamper evidence ring portion of the synthetic resin cap, the base end portion extending from the lower end portion of the main portion to the lower end portion of the tamper evidence ring portion in the cap opening direction side. It is formed as a sloping plate, A plurality of locking protrusions separated from the main portion side by a score are provided along the circumferential direction at a distance, and the cap body is rotated in the closing direction on the main portion side adjacent to the tip of the locking protrusion. When the tamper evidence ring part is moved later than the main part when it is operated, a bridge protection part that engages with the locking projection is provided, and this synthetic resin cap is attached to the mouth part of the container, The closing device is characterized in that the locking claw and the locking projection are engaged with each other when the plug is turned in the opening direction. 2. The locking claw of the container has a surface opposite to the contact surface which engages with the locking projection of the cap when the synthetic resin cap is attached to the container opening and rotated in the opening direction. The closing device according to claim 1, wherein the closing device is an inclined surface whose projection height gradually increases toward the corresponding contact surface side. 3. The bridge protection part has a hook part which engages with a part of the locking projection defined by the horizontal score on the tamper evidence ring part side. Closure device. 4. The closing device according to claim 1, wherein the bridge protection portions are provided so as to correspond to the respective locking projections in a one-to-one correspondence. 5. A tamper-evidence ring portion inner wall surface of the cap is provided with a recess for accommodating the locking projection when the locking projection is tilted with its tip outward in the radial direction. The closing device according to any one of items 1 to 4. 6. The closure device according to claim 1, wherein the tamper evidence ring portion of the cap is provided with a vertical score for opening the tamper evidence ring portion in a band shape. 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 tamper evidence ring section, which comprises a top plate section and a tube section hanging down from the periphery thereof, and is divided from the main section by a horizontal score leaving a plurality of bridges at the bottom of the tube section, and A synthetic resin cap provided with a threaded portion that is screwed into the threaded portion of the container on the inner wall surface of the main portion, wherein the inner wall surface of the tamper evidence ring portion includes a lower end portion of the main portion to a lower end of the tamper evidence ring portion. A plurality of locking protrusions formed in a plate shape that is inclined toward the cap opening direction side from the base end portion that extends to the portion and separated from the main portion side by the horizontal score are provided along the circumferential direction at a distance. And engages with the locking projection on the main portion side adjacent to the tip of the locking projection when the tamper evidence ring portion is slower than the main portion when the cap body is rotated in the closing direction. Synthetic resin cap, wherein a ridge protective portion is provided. 10. The synthetic structure according to claim 9, wherein the bridge protection part has a hook part that engages with a part of the locking projection defined by the horizontal score on the tamper evidence ring part side. Resin cap. 11. The synthetic resin cap according to claim 9, wherein the bridge protection portions are provided in a one-to-one correspondence with the respective locking projections. 12. A tamper-evidence ring portion inner wall surface is provided with a recessed portion for accommodating the locking projection when the locking projection is tilted with its tip outward in the radial direction. 1 to 11 synthetic resin cap. 13. The synthetic resin cap according to claim 9, wherein the tamper evidence ring portion is provided with a vertical score for opening the tamper evidence ring portion in a band shape.