JP2008285205A - Tamperproof cap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tamperproof cap that cannot be uncapped without breaking fragile bridges formed in the slits of the tamperproof ring. <P>SOLUTION: The tamperproof cap includes a cap body and a tamperproof ring. The tamperproof ring is circumferentially divided at regular intervals by the two or more slits. Fragile bridges that break during uncapping are formed in the predetermined areas of the slits. Strong bridges that do not break during uncapping are formed on the upper face of the end on the capping side so as to be in contact with the lower end face of the peripheral wall of the cap body. Ratchets are formed on the internal face of the end on the uncapping side. Pressing inclined projections having the form of a right-angled triangular shape are formed on the upper face of the end on the capping side. Formed on the lower end of the cap body opposite the pressing inclined projections are inclined notches having the form of a right-angled triangular shape, which accommodate the pressing inclined projections and engage with these projections when the cap is rotated in the capping direction. Ring deformation preventing ribs of a predetermined height are formed on the internal circumferential face almost in the circumferential middle. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a tamper-evident cap with a tamper-evident ring connected to a lower portion of a cap body.

Conventionally, as a cap that can be clearly confirmed to have been tampered with before being purchased by a customer at a store, etc., for example, a tamper resistant ring is connected to the lower part of the peripheral wall of the cap body with a reinforced bridge to prevent tampering. There is known a tamper-resistant cap provided with two vertical refractive slits connecting a plurality of portions with a fragile bridge and divided into two at equal intervals (for example, Patent Document 1). The cap with the tamper-evident prevention cap, when the cap screwed to the mouth-neck portion of the container is rotated in the direction of opening to open the container, the cap and the cap on the inclined slope of the tamper-shaped projecting portion of the tamper-evident ring The inclined upper surface of the inclined notch of the main body abuts and the inclined inclined protrusion is pressed downward, and the vertical surface of the ratchet of the tamper-evident ring for opening and the lower ratchet of the container neck Since the vertical surface on the cap opening side of the vertical surface is in contact, the rupture force concentrates on the fragile bridges at a plurality of locations of the slit of the tamper-evident prevention ring, and the fragile bridge is broken. It has been confirmed that the tampering prevention ring has been opened in advance by the breakage of the brittle bridge.
JP 2004-149156 A

  However, in order for the unskilled person to open it intentionally, the center position of the ring that was grabbed with the finger would be different if each of the divided tamper-proof rings was gripped with the fingers and rotated in the opening direction. Since the vicinity is deformed inward and the ring on the side where the ratchet is provided is deformed outward, rotating the tamper-evident ring in the opening direction in this state causes the ratchet and container of the tamper-evident ring to be There was a case where the ratchet did not come into contact, and the brittle bridge provided in the slit of the tamper-evident preventing ring rotated without being broken and the cap was opened. Then, when the removed cap with tamper-evident cap was put on the mouth and neck of the container, the customer could not confirm that it was tampered with before the purchase.

  The present invention solves the problems of the above-mentioned conventional cap with tamper-evident prevention, and the tamper-evident that cannot be opened without breaking the fragile bridge provided in the slit of the tamper-evident ring. A cap with prevention is provided.

  That is, the present invention comprises a cap body provided with a threaded portion with a container on the inner peripheral surface and a tamper-evident ring, wherein the tamper-evident ring is provided with two or more slits at equal intervals in the circumferential direction. Providing and dividing, and providing each of the divided tamper-evident rings by connecting a fragile bridge that breaks at the time of opening to connect the divided tamper-proof rings. On the upper surface of the end portion on the closing direction side, a reinforcing bridge that does not break when opening is provided, connected to the lower end surface of the peripheral wall of the cap body, and the end on the opening direction side of each of the divided tamper-evident rings A ratchet that engages with the ratchet of the container neck when rotating in the opening direction is provided on the inner peripheral surface of the part, and the opening direction side end portions of the divided tamper-evident rings are provided. On top A right-angled triangular pressure-inclined protrusion projecting in the direction of plugging is projected, the pressure-inclined protrusion is accommodated in the lower end portion of the cap body facing the pressure-inclined protrusion, and rotated in the direction of closing. Provided with a right-angled triangular inclined notch that engages with the pressing inclined protrusion, and on the inner peripheral surface at the substantially central position in the circumferential direction of each of the divided tamper-evident rings, A cap for preventing tampering is provided with a ring deformation preventing rib having a predetermined height lower than the height of the ratchet of the divided tamper-evident ring.

  The cap with tamper-evident prevention of the present invention is intentionally opened by an unscrupulous person, so even when the divided portions of the ring for tamper-evident ring are respectively gripped with the fingers in the circumferential direction and rotated in the opening direction, Each of the divided tamper-evident rings is provided with a ring deformation prevention rib of a predetermined height on the inner circumferential surface at the substantially central position in the circumferential direction. Therefore, the ratchet of the tamper-evident ring and the ratchet of the container always come into contact with each other, and the brittle bridge provided in the slit of the tamper-proof ring is surely broken. As a result, even if the cap is removed with the removed cap, the fragile bridge of the slit of the tamper-evident ring is broken, so that it can be clearly confirmed in advance that the tampering has been opened.

  Next, an embodiment of the cap with tamper-evident prevention according to the present invention will be described in detail with reference to the drawings.

  Fig.1 (a) is a front view of the cap with unauthorized opening prevention of this embodiment, FIG.1 (b) is the bottom view.

  As shown in FIG. 1A, the cap (10) with tamper-evident prevention according to the present embodiment includes a cap body (100) screwed to the mouth and neck of the container and a tamper-evident prevention ring (200). It is a cap. As shown in FIGS. 1A and 1B, the tamper-evident ring is divided into two by providing slits (201, 202 not shown) at equal intervals in the circumferential direction. A brittle bridge (203, 204) that breaks at the time of opening the plug is provided at each lower end of each plug to connect the divided tamper-evident rings (210, 220) to prevent divided tamper-evidents. Reinforcement bridges (214 not shown, 224) that are not broken when the caps are opened are provided on the upper surfaces of the end portions of the respective rings (210, 220) in the closing direction (X direction), and the tamper-proof ring is attached to the cap body. It connects to the peripheral wall lower end surface. And as shown in FIG.1 (b), it rotated in the plugging direction (X direction) to the inner peripheral surface of the edge part by the side of the opening direction of each of the divided ring for unauthorized opening prevention (210, 220). There are sometimes ratchets (211 and 221) that do not engage with the ratchet of the container mouth neck, but engage with the ratchet of the container mouth neck when rotated in the opening direction (Y direction). On the upper surface of the end portion of each of the tampering prevention rings (210, 220) on the side of the opening direction (Y direction), a right-angled triangular pressing inclined protrusion (213, 223 not shown) inclined toward the closing direction. , And the pressure inclined protrusion (213, 223 not shown) is accommodated in the lower end portion of the cap body (100) opposite to the pressure inclined protrusion (213, 223 not shown) to close the cap. When pressing in the direction (X direction) In which the projecting portion (213, 223 not shown) and providing a right triangle inclined notch mutually engaged. Further, as shown in FIG. 1 (b), the divided tamper-evident ring (210) is formed on the inner peripheral surface at the substantially central position in the circumferential direction of each of the divided tamper-resistant rings (210, 220). , 220) is provided with a ring deformation preventing rib (212, 222) having a predetermined height lower than the height of the ratchet (211, 221).

  As shown in FIG. 1A, the cap body (100) is composed of a top plate (110) and a peripheral wall (120), and the bottom surface of the top plate (110) is used to seal the container mouth. If necessary, an inner sealing ring (the outer peripheral surface is in close contact with the inner peripheral surface of the container mouth, not shown), a contact sealing ring (the tip is in close contact with the upper surface of the container mouth, not shown), etc. It is to be provided. Further, a vertical knurl is provided on the outer peripheral surface of the peripheral wall (120) to facilitate rotation with a finger.

  The tamper-evident cap is formed by integrally molding the cap body (100) and the tamper-evident prevention ring by an injection molding method using a thermoplastic resin such as polyethylene or polypropylene.

  In addition, the tamper-resistant cap of the present embodiment is a tamper-resistant ring when the cap screwed to the mouth and neck of the container is rotated in the opening direction by grasping the outer peripheral surface of the cap body with a finger. Even if the outer peripheral surface of the cap is gripped with a finger and rotated in the direction of opening, the inclined upper surface of the pressing inclined protrusion of the tamper-evident ring and the inclined upper surface of the inclined notch of the cap body are in contact with each other, and the pressing inclined protrusion The tactile portion is pressed downward, and the ratchet of the tamper-evident ring and the vertical surface in the opening direction come into contact with the vertical surface on the cap opening side of the vertical surface of the ratchet below the neck of the container mouth, so that tampering is achieved. The breaking force concentrates on the brittle bridge provided in the slit of the prevention ring, so that the brittle bridge is surely broken. The cap cannot be removed from the container without breaking the fragile bridge of the tamper-evident ring.

(A) is a front view of one Embodiment of the cap with unauthorized tampering prevention of this invention, (b) is the bottom view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Cap with tamper-evident prevention 100 ... Cap main body 110 ... Top plate 120 ... Peripheral wall 121 ... Knurl 122, 123 ... Inclined notch 200 ... Tamper-proof ring 201, 202 ... Slit 203 , 204 ...... Fragile bridges 210, 220 ...... Divided tamper-evident rings 211, 221 ...... Ratchets 212, 222 ...... Ring deformation prevention ribs 213, 223 ...... Pressing inclined protrusions 214, 224 ...... Strengthening Bridge X ... Capping direction Y ... Capping direction

Claims (1)

  A cap body provided with a threaded portion with the container on the inner peripheral surface, and a tamper-evident ring, wherein the tamper-evident ring is divided by providing two or more slits at equal intervals in the circumferential direction, Each of the slits is provided with a fragile bridge that breaks when opened to connect the divided tamper-evident rings, and end portions of the divided tamper-evident rings on the capping direction side. A reinforcing bridge that does not break at the time of opening is provided on the upper surface of the cap, connected to the lower end surface of the peripheral wall of the cap body, and on the inner peripheral surface of the end portion on the opening direction side of each of the divided tamper-evident rings. A ratchet that engages with the ratchet of the container mouth neck when rotated in the opening direction is provided, and on the upper surface of the end portion on the opening direction side of each of the divided tamper-evident rings, in the closing direction Incline An angled triangle-shaped pressing inclined protrusion is provided so that the pressing inclined protrusion is accommodated in a lower end portion of the cap body facing the pressing inclined protrusion, and the pressing is performed when rotated in the closing direction. Provided with a right-angled triangular notch that engages with the inclined protrusion, and the divided tamper-opening is formed on the inner circumferential surface of the divided tamper-preventing ring at a substantially central position in the circumferential direction. A tamper-proof cap provided with a ring deformation prevention rib having a predetermined height lower than the height of the ratchet of the prevention ring.

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