JP2018104059A - Screw cap with seal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screw cap with seal that does not break when installed onto an opening cylindrical part of a container main body, while being breakable so as to enable separate disposal of a seal ring by removing a cap main body from the container main body after the use of the content.SOLUTION: A screw cap with seal includes: a cap main body serving as an installation part which is screwed onto an opening cylindrical part of a container main body; and a seal ring connected with the lower end of the cap main body via a breakable weakened connecting piece. The opening cylindrical part of the container main body has a locking projection on the outer periphery. The seal ring has: an annular band body connected via a connection piece whose end in the circumferential direction is breakable; a plurality of locking claw pieces provided along the circumferential direction of the inner peripheral lower part of the band body and engaged with the locking projection on the outer periphery of the opening cylindrical part of the container main body; and window holes opened on the band body along the upper part of the locking claw pieces. The band body has an unbreakable connecting part on which the vicinity of the side end in the screwing direction is connected with the lower end of the cap main body.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a screw cap with a seal provided with a seal ring for preventing unauthorized opening, and more particularly to a screw cap with a seal that is screwed onto a mouth tube portion of a container.

As a screw cap with a pilfer proof function, it is impossible to come out to the locking protrusion on the outer periphery of the mouth tube portion through a plurality of thin connecting pieces at the lower end of the cap body screwed to the outer periphery of the mouth tube portion of the container body. 2. Description of the Related Art Conventionally, a screw cap with a seal that prevents unauthorized opening by connecting a sealing ring to be stopped has been widely used.
This type of screw cap is separated into a sealing ring that remains in the lower part of the mouth tube part and a cap body that is opened when the connecting piece is broken as it is unscrewed from the mouth tube part of the container body at the time of opening. Thus, it can be determined that the screw cap has been opened.

  Further, five window holes 5 communicating with the inside and the outside are formed at equal intervals in the ring body 4 of the pilfer proof cap, and engaged with a flange A1 formed on the bottle mouth A on the inner surface of the lower end edge of each window hole 5. As an example of the inward engagement portion, the tongue-shaped protrusion 7 is formed so as to extend obliquely upward, and when the screw cap 2 is screwed into the bottle mouth A, each protrusion 7 of the ring body 4 is A cap with a seal which is elastically deformed so as to occur radially outward upon hitting the flange A1 of A and then returns to its original posture when passing through the flange A1, and the tip of each projection 7 is engaged with the lower surface of the flange A1. Is conventionally known (see, for example, Patent Document 1).

Japanese Patent No. 2521887

However, in the cap with seal described in Patent Document 1, the ring body 4 for opening determination is divided into a non-loop shape through a narrow slit 6a, and one end of both ends divided by the slit 6a. Since the rectangular cutout groove 6b is formed in the portion with a downward opening communicating with the slit 6a, when the screw lid 2 is screwed into the bottle mouth A, the ring body 4 is lowered when the screw lid 2 is lowered. At the same time, a force that expands in the radial direction is applied to overcome the screw thread of the bottle mouth A and the flange A1, and the notch groove 6b is deformed so as to expand from below, so that the screw lid 2 There was a possibility that the bridge portion 3 connecting the ring body 4 would break.
In addition, since the cap with a seal is used again by screwing the screw lid 2 into the bottle mouth A after opening, the cap screw as a mounting portion is first removed from the container body and discarded after the contents are used. There was a problem that it was not suitable for use in a cap.

  An object of the present invention is to solve the above-mentioned problems, and in a screw cap with a seal provided with a seal ring for preventing unauthorized opening, the seal ring is used as a mounting part after use of the contents. It is an object of the present invention to provide a screw cap with a seal that can be broken so that it can be removed from the main body and can be disposed of separately, and is not broken when it is attached to the mouth tube portion of the container main body.

  In order to solve the above-mentioned problem, the present invention provides a cap body as a mounting portion screwed into a mouth tube portion of a container body as a screw cap with a seal, and a breakable weakening connecting piece at the lower end of the cap body. A sealing ring that is connected via a connecting ring, a mouth tube portion of the container main body is provided with a locking protrusion on the outer periphery, and the sealing ring is an annular belt body that is connected by a connecting piece that can be broken in the circumferential direction. And a plurality of locking claw pieces arranged in the circumferential direction of the inner peripheral lower portion of the belt body, and engaging with the locking protrusions on the outer periphery of the mouth tube portion of the container body, along the upper portion of the locking claw piece, The belt body has a window hole that is open to the body, and the band body has a non-breakable connecting portion that is connected to the lower end of the cap main body in the vicinity of the end in the screwing direction.

As an embodiment of the sealing ring of the screw cap with sealing, the belt body extends in the screwing direction from two connecting portions connected at positions opposed to the radial direction of the cap body, and is respectively attached to the other circumferential end portion. A structure characterized by being connected via a connecting piece is adopted, and the sealing ring has a spacer convex part on the upper surface of the strip body away from the connecting part and close to the lower end of the cap body. In addition, the order in which the weakened connecting piece and the connecting piece are broken is such that the connecting piece breaks and then the weakened connecting piece breaks as the cap body is unscrewed when opened. The band is formed in an L shape continuously with the connecting portion in a side view, and the lower end of the circumferential end of the band is formed by a connecting piece. Connect and form a gap at the top To adopt a structure characterized by.
Furthermore, as an embodiment of the screw cap with seal, the cap main body further adopts a configuration characterized by including a lid body continuously provided via a hinge.

  In the screw cap with seal of the present invention, a plurality of sealing rings are disposed in the circumferential direction of the annular strip connected by the connection piece whose peripheral end can be broken and the inner peripheral lower portion of the strip, and the container body Since there is a locking claw piece that engages with a locking protrusion on the outer periphery of the mouth tube part, and a window hole that is opened in the band along the upper part of the locking claw piece, When attaching the cap body to the mouth tube portion of the container body, even if the locking claw piece of the sealing ring tries to spread over the thread or locking ridge of the mouth tube portion, Since the force to rotate on the lower edge of the window hole acts to deform outward, it is possible to suppress the sealing ring from spreading outward, so that the sealing ring does not break.

  In the screw cap with seal of the present invention, a plurality of locking claw pieces that are engaged with locking protrusions on the outer periphery of the mouth tube portion of the container body are arranged in the circumferential direction at the inner peripheral lower portion of the band of the sealing ring. Since the connecting portion is provided at the upper part of the end portion of the belt body in the screwing direction, when the cap body is unscrewed, the end portion of the sealing ring in the screwing direction side portion is connected to the connecting portion. The connection piece is broken first, and then the weakened connection piece is broken by further progress of screwing, so that a large load is not applied at the time of opening, so opening is difficult. Or the sealing ring does not break and remains in the mouth tube portion of the container body.

It is a figure which shows the state which screwed the hinge cap which is an Example of this invention to the container main body, (a) is side sectional drawing, (b) is the latching protrusion of a port cylinder part, and the latching claw of a sealing ring It is an expanded sectional view which shows a latching state with a piece. It is a figure which shows the state which opened the hinge cap which is an Example of this invention, (a) is a top view, (b) is a side view. It is a figure which shows the state which opened the hinge cap which is an Example of this invention, (a) is side sectional drawing, (b) is a bottom view. It is a figure which shows the cross section of FIG. 3, (a) is XX arrow sectional drawing, (b) is YY arrow sectional drawing.

  A screw cap with a seal according to the present invention will be described with reference to the drawings showing an embodiment embodied as a hinge cap mounting portion.

  In FIG. 1, A is a container main body, B is a cap main body screwed into the mouth tube portion 1 of the container main body A, C is a sealing ring integrally connected to a lower end portion of the cap main body B, and D is a cap main body B. It is the lid integrally formed through the hinge E.

  The container body A includes a mouth tube portion 1, and a screw 2 is screwed on the outer periphery of the mouth tube portion 1, and a locking protrusion 3 having a diameter larger than that of a screw thread top portion is provided below the screw 2. Further, a neck ring 4 is formed below the locking protrusion 3.

As shown in FIGS. 2 and 3, the cap main body B includes a cylindrical outer peripheral cylindrical portion 6, a ring-shaped upper wall portion 7 that is connected to the inner periphery of the upper end of the outer peripheral cylindrical portion 6, and an upper wall portion 7. A lid engaging portion 8 erected on the upper surface of the upper wall portion 7, a pouring cylinder 9 provided continuously with the inner edge of the upper wall portion 7, and a partition wall 10 provided continuously with an inner peripheral lower portion of the pouring cylinder 9. Yes.
The outer peripheral cylindrical portion 6 has an inner peripheral surface formed with a screw portion 11 that is screwed with a screw 2 formed on the mouth cylindrical portion 1 of the container body A, and an outer peripheral surface formed with an anti-slip knurl 12. .

The dispensing tube 9 is provided with a seal portion 13 that extends downward from the lower surface of the continuous upper wall portion 7 and has an outer periphery fitted to the inner periphery of the mouth tube portion 1.
The partition 10 has a removal portion 15 defined by a thinned weakened portion 14 that can be broken. A pull ring 16 is provided on the upper surface of the removed portion 15. The thinned weakened portion 14 is broken by pulling up the pull ring 16. Then, the removal portion 15 is removed, and a spout communicating with the inside of the container is formed in the partition wall 10.

On the lower end surface 17 of the outer peripheral cylindrical portion 6, thin weakened connecting pieces 18 formed so as to be ruptured are provided at a plurality of locations in the circumferential direction. Similarly, together with the two connecting portions 19 provided on the lower end surface 17, It is connected to the sealing ring C.
In the present embodiment, six weakening connecting pieces 18 are provided at equal intervals in the circumferential direction from the hinge E side of the outer peripheral cylindrical portion 6. Although it does not matter, in order to reduce the addition at the time of opening, the smaller one is preferable.
Moreover, as shown in FIG. 2, the connection part 19 is set to the width | variety higher than the weakening connection piece 18, and high intensity | strength, and the intensity | strength which does not fracture | rupture at the time of opening.

As shown in FIG. 4 (a), the sealing ring C extends in the screwing direction starting from two opposing connecting portions 19, and each of the sealing rings C has a screwing direction side end portion 21a which is a circumferential end portion thereof. It consists of a pair of strips 21 that are connected to each other in the screwing direction side end 21b by a breakable thin connecting piece 20 and formed in an annular shape, and each strip 21 is a side view shown in FIG. Thus, an L-shape that is continuous with the connecting portion 19 is formed.
An inclined surface 21 c that is inclined so as to spread out is formed on the inner periphery of the belt body 21, and a locking protrusion 3 provided on the outer periphery of the mouth tube portion 1 of the container body A is formed on the inner peripheral lower portion of the belt body 21. A plurality of locking claw pieces 22 that are engaged with each other are arranged in the circumferential direction.
As shown in FIG. 1A, the locking claw piece 22 is a projecting piece having a constant thickness and projecting obliquely upward toward the inside, and the sealing ring C together with the cap body B is connected to the container body A. When it is mounted on the mouth tube portion 1, it is adapted to get over the locking protrusion 3 and engage with the lower surface of the locking protrusion 3.
In the present embodiment, as shown in FIG. 4, the four locking claw pieces 22 are arranged at equal intervals on the inner periphery of the band body 21, avoiding the place where the connection piece 20 is connected. This number may be larger or smaller as long as the locked state of the mouth tube portion 1 with the locking protrusion 3 can be maintained.

The connection piece 20 is provided on both sides of the sealing ring C adjacent to the connecting portion 19 as shown in FIG. 4A, and as shown in FIG. The lower portions of the end portion 21a and the screwing direction side end portion 21b are connected, but the connecting piece 20 is provided between the upper portion of the screwing direction side end portion 21a and the upper portion of the screwing direction side end portion 21b. It does not exist and a gap is formed.
The band body 21 is formed with a slit-like window hole 23 in the circumferential direction along the upper portion where the locking claw piece 22 is projected, and the circumferential length of the window hole 23 is at least that of the locking claw piece 22. It is preferable that the circumferential length is set, and the lower edge portion 23a of the window hole 23 has a length that can be bent and deformed.

Further, as shown in FIG. 4A, a spacer convex portion 24 is formed on the upper surface of the band body 21 and close to the lower end surface 17 of the outer peripheral cylindrical portion 6, and the sealing ring C receives a pressing force from below. At this time, the distance between the lower end surface 17 of the outer peripheral cylindrical portion 6 and the belt body 21 is maintained so that the weakened connecting piece 18 does not buckle and break.
For this reason, the spacer convex portion 24 surrounds the weakened connecting piece 18 provided on the hinge E side away from the connecting portion 19 that firmly connects the cap body B and the sealing ring C and on the opposite side of the hinge E. , Formed on the upper surface of the band 21.

The lid D is engaged with the top wall 30 forming the top surface, the side peripheral wall 31 suspended from the periphery of the top wall 30, and the outer periphery engages with the inner periphery of the extraction cylinder 9 of the cap body B when the lid is closed. A sealing cylinder 32 is provided, and is connected to the hinge E at a predetermined position on the outer periphery of the lower end of the side peripheral wall 31.
The side peripheral wall 31 is provided with an engagement recess 33 that fits with the lid engaging portion 8 of the cap body B when the lid is closed and maintains the closed state at the lower portion of the inner periphery. On the opposite side, a finger hook 34 is recessed on the outer periphery so that the fingertip can be hooked when the lid is opened.

Next, usage modes and operational effects of this embodiment will be described.
As shown in FIGS. 2 and 3, the hinge cap of the present embodiment is manufactured by integral molding in an open state. At that time, a locking claw piece is provided on the inner peripheral lower portion of the band body 21 of the sealing ring C. Since 22 protrudes diagonally upward toward the inside, it is forcibly removed when releasing from the mold.
At the time of this forced removal, since the window hole 23 is formed in the circumferential direction along the upper part where the locking claw piece 22 is projected on the band 21, the locking claw piece 22 is directed downward. It becomes easy to deform and release from the mold becomes easy.
Next, in order to attach the hinge cap of the present embodiment to the container main body A, first, the lid body D is rotated around the hinge E from the open state manufactured by integral molding and is put on the cap main body B. By pressing from above, the engaging recess 33 of the lid body D engages with the lid engaging portion 8 of the cap body B, thereby closing the hinge cap.

Thereafter, as shown in FIG. 1, the screw portion 11 of the cap body B is screwed to the screw 2 formed in the mouth tube portion 1 of the container body A filled with the contents, and the cap body B is moved in the screwing direction. As it rotates, the sealing ring C is connected to the cap body B by the weakened connecting piece 18 and the connecting part 19, and further, a spacer convex part 24 is formed, and the gap between the cap body B and the sealing ring C is maintained. Therefore, the cap body B descends.
At that time, the locking claw piece 22 projecting from the lower portion of the inclined surface 21c formed on the inner periphery of the band body 21 comes into contact with the screw 2 of the mouth tube portion 1, and further the cap body B is screwed. Then, since the locking claw piece 22 tries to get over the screw 2 by its elastic deformation, a force acts so as to spread the band body 21 outward, and the connection piece 20 connected to the band body 21 acts on the connection piece 20. The pulling force works.

  However, since the window body 23 is formed in the circumferential direction along the upper part where the locking claw piece 22 is projected from the band body 21, the locking claw piece 22 tries to be deformed outward and the window A force (rotational moment) for rotating counterclockwise as viewed in FIG. 1B acts on the lower edge portion 23a of the hole 23, and the belt body 21 can be prevented from spreading outward, The connection piece 20 does not break when the container body A is mounted.

Thereafter, when the cap main body B is lowered to a predetermined height, the locking claw pieces 22 provided at the lower inner periphery of the sealing ring C come into contact with the locking protrusions 3 of the mouth tube portion 1, and further the cap main body B As the screw 2 is screwed in, the locking claw piece 22 can get over the same way as the screw 2 described above.
When the cap body B is further screwed in, the locking claw piece 22 engages with the lower surface of the locking protrusion 3 and the attachment of the hinge cap to the container body A is completed.

At this time, the upper surface of the mouth tube portion 1 to which the hinge cap is attached is in contact with the lower surface of the upper wall portion 7, and the seal portion 13 is fitted to the inner periphery of the mouth tube portion 1 on which the screw 2 is not formed. By this, the inside of the container is sealed.
When the attachment of the hinge cap to the container main body A is completed, if the cap main body B is illegally opened before the hinge cap is unplugged, the hinge cap is connected to the sealing ring C and the weakened connecting piece 18 that connects the cap main body B. The connecting piece 20 connecting the band 21 of the sealing ring C is broken, and the tampering of the cap body B can be visually confirmed.

In order to use the container equipped with the hinge cap of the present embodiment, when the finger hook portion 34 of the lid body D is lifted and rotated around the hinge E to open the lid, the pull ring 16 is gripped and pulled up. The thinned weakened portion 14 is broken and the removed portion 15 is separated from the partition wall 10 to open the spout.
If the container in which the spout is opened is tilted in the direction opposite to the hinge E, the contents filled in the container can be guided to the spout cylinder 9 through the spout and the required amount can be poured out. it can.
After use, the lid body D is turned around the hinge E, and the engagement recess 33 is fitted into the lid engagement portion 8 of the cap body B, so that the lid is closed again. The outer periphery engages with the inner periphery of the dispensing tube 9 to seal the inside of the container.

Next, a mode when the cap body B of the hinge cap attached to the container body A is opened for the first time when the contents filled in the container are used and the container is discarded will be described.
When the finger is put on the knurled portion 12 formed on the outer peripheral cylindrical portion 6 of the cap body B and rotated in the screwing direction, the cap body B rises, whereas the sealing ring C has the belt body 21. Since the latching claw piece 22 is engaged with the lower surface of the latching protrusion 3 formed on the mouth tube portion 1, the ascent is prevented.
At this time, if the cap body B is further rotated against the frictional resistance generated by the rotation of the cap body B, the belt body 21 is extended due to an increase in the frictional force, and the connecting piece 20 is moved up and down. In addition to the pulling force, a shearing force is also applied and breaks.

Even if the connecting piece 20 breaks, the two connecting portions 19 have higher strength than the connecting piece 20 and the end 21b of the band member 21 provided with the connecting portion 19 is locked to the screwing direction side end portion 21b. Since the claw piece 22 is not provided, as the cap body B rotates and rises, the connecting portion 19 raises the vicinity of the end portion 21b of the band body 21 in the screwing direction and further rotates the sealing ring C. .
On the other hand, at the opposite end 21a in the screwing direction, the connecting piece 20 is broken and the locking claw piece 22 is engaged with the locking protrusion 3, so that the cap body B and the sealing ring C When the gap between them becomes large, the weakened connecting piece 18 is easily broken by a shearing force.

When the two connection pieces 20 are broken, the end 21a of the strip 21 in the screwing direction becomes free, and the engagement between the locking claw piece 22 and the locking protrusion 3 is released. The cap body B can be rotated to open the lid while the sealing ring C thus formed is connected by the connecting portion 19.
Thereafter, the cap body B can be separated from the container body A while being connected to the sealing ring C.

As described above, in this embodiment, the hinge cap with the screw cap with seal as the mounting portion has been described as the screw cap with seal. However, the screw cap with seal according to the present invention is not limited to the hinge cap but includes a pump and a trigger. It can be used as a cap mounting part.
Even in the case of a cap with a pump or trigger, after opening the cap body B, the weakened connecting piece 18 or the connecting piece 20 breaks, and the appearance of the cap with the pump or trigger changes from before opening. In addition to being visible, the cap main body B can be separated and discarded from the container main body A in a state where it is connected to the sealing ring C.

  Moreover, since the window hole 23 is formed in the strip | belt body 21 along the upper part by which the latching claw piece 22 was protrudingly provided, when the latching claw piece 22 deform | transforms outside, the window hole 23 is formed. Rotation force acts on the lower edge portion 23a of the belt, and the belt 21 can be prevented from spreading outward. When the cap or the cap with the trigger is attached to the container body A, the sealing ring C Will not break.

  The screw cap with a seal according to the present invention can visually recognize an unauthorized opening, and can prevent the sealing ring from being broken by a screw thread or a locking protrusion of the container mouth tube portion when being mounted on the container body. Therefore, it can be widely used as a screw cap with a sealing ring that needs to be visually confirmed for unauthorized opening used in food containers and cosmetic containers.

A Container body B Cap body C Sealing ring D Cover E Hinge 1 Mouth tube portion 2 Screw 3 Locking ridge 4 Neck ring 6 Outer tube portion 7 Upper wall portion 8 Lid engaging portion 9 Extraction tube 10 Bulkhead 11 Screw portion 12 Knurling 13 Sealing portion 14 Thinning weakening portion 15 Removal portion 16 Pull ring 17 Lower end surface 18 Weakening connection piece 19 Connection portion 21 Band 21a Unscrewing direction side end 21b Screwing direction side end 21c Inclined surface 22 Locking Claw piece 23 Window hole 23a Lower edge 24 Spacer convex part 30 Top wall 31 Side peripheral wall 32 Sealing cylinder 33 Engaging concave part 34 Finger hook part

Claims (6)

A cap body as a mounting portion screwed into the mouth tube portion of the container body, and a sealing ring connected to the lower end of the cap body via a weakened connecting piece that can be broken,
The mouth tube portion of the container body has a locking protrusion on the outer periphery,
A plurality of sealing rings are arranged in the circumferential direction of the annular strip connected at its circumferential end by a breakable connecting piece, and the inner peripheral lower portion of the strip, and the locking projection on the outer periphery of the mouth tube portion of the container body A locking claw piece that engages with the strip, and a window hole that is opened in the band along the top of the locking claw piece,
The band body has a non-breakable connecting portion in which the vicinity of the end portion in the screwing direction is connected to the lower end of the cap main body, and the screw cap with seal.   The belt body extends in the screwing direction from two coupling portions coupled at positions facing the radial direction of the cap body, and is connected to the other circumferential end portion via a connecting piece. The screw cap with a seal according to claim 1.   3. The screw cap with seal according to claim 1, wherein the sealing ring has a spacer convex portion adjacent to the lower end of the cap body on the upper surface of the band body separated from the connecting portion.   The order in which the weakened connecting piece and the connecting piece break is set so that the connecting piece breaks and the weakened connecting piece breaks as the cap body is unscrewed when opened. The screw cap with a seal according to any one of claims 1 to 3. The band is L-shaped in a side view and continuous with the connecting part,
The threaded cap with a seal according to any one of claims 1 to 4, wherein the end portion in the circumferential direction of the belt body connects the lower portion with a connecting piece and forms a gap in the upper portion.   6. The screw cap with a seal according to any one of claims 1 to 5, wherein the cap body further includes a lid body continuously provided via a hinge.

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