JP2008030823A - Pilfer-proof cap made of synthetic resin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pilfer-proof cap which can be easily opened because fingers do not slip. <P>SOLUTION: The pilfer-proof cap comprises a screw cap 1 and a tamper-evidence band 2, and flat notches 7 are formed in a plurality of places on the outer periphery of the screw cap 1. The notch 7 has a spread angle of approximately 50-60° at an angle of θ in a plan view. Many knurls (protrusions) 8 are formed on a part, except the notches 7, of the outer periphery of the screw cap 1. Since the screw cap 1 can be rotated in such a state as to be rotated with a wrench, it can be lightly opened without slipping the fingers. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a synthetic resin pilfer-proof cap (a lid device with an unauthorized opening preventing function) provided with a screw lid and a tapper evidence band.

  Pilfers equipped with tapper evidence bands (TE bands) as sealing means for bottles such as PET bottles and glass bottles, bag-like containers provided with a pouch on a flexible bag, or fluid containers such as paper packs Proof caps are frequently used. The tapper evidence band is also called a pilfer proof band (PP band), and is connected to the screw cap through a bridge portion that is broken by an opening operation.

  The pilfer-proof cap is divided into a resin-made one and a metal plate (tinplate-made) as viewed from the material. Further, when viewed from the state after opening, it is divided into a type in which the tapper evidence band is separated from the screw lid by opening and a type in which the tapper evidence band remains connected to the screw lid after opening.

  Furthermore, when viewed from the principle that the bridge part breaks due to the opening operation, a locking claw that is hooked from below on the flange of the container is provided on the inner periphery of the tapper evidence band, and only the screw lid moves upward so that the bridge part is moved upward. The bridge part is formed by the type that can be broken and the ratchet claw provided on the inner periphery of the tapper evidence band hits the stopper formed on the outer periphery of the mouth of the container, the tapper evidence band is held unrotatable and only the screw lid rotates. It can be divided into a thousand pieces.

  Pilfer proof caps can be used easily in beverage containers where safety is particularly required, since they can be easily grasped during tampering at the distribution stage, but there are some that are difficult to open due to tight tightening into the container mouth. Is the problem. It is difficult to open the screw lid and to rotate it. The cause is that the inner stopper provided on the top plate of the screw lid is strongly fitted in the mouth of the container, and the screw unwinding resistance is increased. In some cases, the screw lid and the male screw of the container are strongly screwed to generate a large frictional resistance, or the bridge portion is difficult to break and the resistance is increased.

  In addition, it is one of the causes that it is difficult to open the finger because it is difficult for the finger to slip from the screw lid and to apply a large force to the screw lid. In order to improve the catching of the finger, a knurled portion composed of a large number of fine protrusions is formed on the outer periphery of the screw lid, but it is still often difficult to open. In particular, when the screw lid is wet with water, it is difficult to open the finger because the finger is slippery.

Thus, it has been proposed to improve the finger's catch on the screw lid. As an example, Patent Document 1 describes that the height of adjacent ridges (ribs) is changed in forming a knurled portion on the outer periphery of a screw lid. In the cap that forms a knurled portion made of a protrusion having a constant height on the outer periphery of the screw cap, it is disclosed that ribs having a high height are formed at a plurality of locations on the outer periphery of the screw lid in a state where the knurled portion is divided. Yes.
JP 2001-345247 A JP 2006-001600 A

  It is speculated that both of the above references can improve finger catching compared to conventional products that only form a simple knurled part, but if the container is tightly tightened against the mouth, It can be said that the slip phenomenon is difficult to prevent.

  The present invention has been made in view of such a situation, and it is an object of the present invention to provide a pilfer-proof cap that dramatically improves the hooking function of a finger against a screw lid and realizes outstanding ease of opening. It is.

  In order to solve the above-mentioned problem, the present invention provides a screw lid formed by integrally providing a top plate at the upper end of a cylindrical portion having an inner thread formed on the inner periphery, and a tapper evidence band integrally provided at the lower end of the cylindrical portion. In the pilfer proof cap made of, a substantially flat cutout is formed at a plurality of locations along the circumferential direction of the outer periphery of the screw lid, and the same radius of curvature of the portion excluding the cutout It has a configuration of an arc shape.

  Further, in a preferred development of the present invention, as described in claim 2, 2 to 4 notches are formed at substantially equal intervals in the circumferential direction, and 50 to 60 in plan view. On the other hand, the arc-shaped portion is formed with a plurality of vertically long knurls.

  According to the present invention, the flat notch is formed on the outer periphery of the screw lid, so that the screw lid is caught in the finger so that the screw lid is remarkably improved. For this reason, a large rotational torque can be applied to the screw lid, and as a result, the cap can be easily opened even if the cap is tightly fastened to the container mouth.

  Since the invention of the present application is intended to generate a rotational couple by hooking a finger on the notch of the screw lid rather than increasing the frictional resistance of the screw lid, it can be easily opened even when the cap is wet with water. it can. Also, when opening the bag-like container with the bag welded to the resin spout, the base of the spout where the bag is welded is picked with one hand, but the base of the spout is small and secure. Although it is difficult to grasp and therefore it is difficult to open as compared with bottles, in the present invention, the screw lid can be firmly grasped and rotated, so that even a bag-like container can be opened easily.

  If the width of the notch is too small, a finger catching function cannot be expected. Conversely, if the notch is too wide, the overall outer diameter increases to ensure the necessary wall thickness. In this respect, when set as in claim 2, the finger catchability is ensured without causing an increase in size, and the knurl is formed in the arc-shaped portion, and the finger catching is further improved. It was particularly suitable. As the actual size, the width of the notch was preferably about 10 to 15 mm (not to mention, the actual size also depends on the outer diameter of the screw lid).

  Although it is conceivable to form the entire screw lid in a polygonal shape, there is a problem in that the screw cap is not round and may give the consumer a sense of incongruity, and the configuration of the capper must be changed. On the other hand, in the present invention, the non-notched portion is arc-shaped and basically circular, so that it does not give the consumer a sense of incongruity, and the conventional capper is used as it is and screwing after filling. Can be done.

(1). First Embodiment Next, an embodiment of the present invention will be described with reference to the drawings. First, a first embodiment will be described based on FIG. The pilfer-proof cap of the present embodiment is applied to sealing a bag-like container. In FIG. 1, (A) is a front view, (B) is a plan view, and (C) is a partial plan sectional view. (D) is a DD sectional view of (B).

  The pilfer proof cap includes a screw lid 1 and a tapper evidence band 2 provided integrally at the lower end thereof. The screw lid 1 includes a cylindrical portion 3 and a top plate 4 integrally connected to the upper end thereof, and an inner screw 5 is formed on the inner periphery of the cylindrical portion 3. The cylindrical portion 3 is basically cylindrical, and a flange portion 6 having a smooth outer peripheral surface is formed at the lower end portion.

  And the flat notch 7 is formed in two places which pinched | interposed the axial center among the outer peripheral surfaces above the flange part 6 among the cylinder parts 3, and the part between the notch 7 and the notch 7 is The arcuate portion is formed with a large number of fine knurls 8. On the lower surface of the top plate 4, an inner stopper portion 10 that is fitted into a container mouth portion (not shown) is formed.

  Although the notch 7 is flat, it may be curved in an outwardly concave shape in a plan view as shown by a one-dot chain line in (B) (the same applies to other embodiments). The lower end portion of the notch 7 is an inclined surface 7 a and is continuous with the flange portion 6. The range in which the notch 7 expands in plan view is set to about 60 ° at the angle θ. In FIG. 1, only the line of the top surface portion of the knurl 8 is displayed, and only the line of the inner screw 5 and the top surface portion is displayed in FIG. Further, in the figure, the cylindrical portion 3 is shown as a complete straight cylindrical shape, but actually, a slight draft (taper) is attached to the outer periphery of the cylindrical portion 3.

  The tapper evidence band 2 is connected to the screw lid 1 via a plurality of (four) bridge portions 11 arranged in a jumping manner in the circumferential direction. Further, the tapper evidence band 2 of the present invention is of a ratchet type, and ratchet claws 12 are formed at four positions on the inner peripheral surface at equal intervals. Two ratchet claws 12 that are opposite to each other among the four ratchet claws 12 are arranged in the middle portion of the notch 7 of the screw lid 1, and are connected to the two ratchet claws 12 so that the tapper evidence band 2 A trapezoidal upward projection 13 is formed on the upper end surface, and a downward fitting groove 14 is formed in the flange portion 6 of the screw lid 1 with a slight gap from the upward projection 13.

  The upward protrusion 13 and the downward fitting groove 14 are for preventing the bridge portion 11 from being broken at the time of screwing, and the forward side end face on the front side is inclined forwardly toward the screwing direction, The follower side end surface located on the near side in the screwing direction is a vertical surface extending in the same direction as the axis. Accordingly, when the screw is screwed in, no external force is applied to the bridge portion 11 so as to break, and only the screw lid 1 rotates at the time of opening.

  In addition, since the upward protrusion 13 and the downward fitting groove 14 are formed at the location of the notch 7, the upward protrusion 13 and the downward fitting groove 14 should be originally drawn at both left and right ends in (D). However, in (D), the tapper evidence band 2 and the downward fitting groove 14 are displayed in a state shifted by 90 °.

  In the above configuration, since the notch 7 is formed on the outer peripheral surface of the screw lid 1, when opening, the finger is placed on the notch, so that it becomes the same state as rotating with a spanner. A large rotational torque can be applied to the screw lid 1. As a result, the cap can be opened easily even if the cap is tightened into the mouth of the container.

(2). Other Embodiments FIG. 2 shows a second embodiment which is a modification of the first embodiment. (A) is a front view, (B) is a partial longitudinal sectional view. In this embodiment, an engagement claw 15 is provided on the inner peripheral surface of the tapper evidence band 2, and the form of the screw lid 1 is the same as that of the first embodiment except that the downward fitting groove 14 does not exist. .

  The engaging claws 15 can be formed so as to be continuous over the entire circumference, and a large number of the engaging claws 15 can be formed in a jumping state. As an example of the jumping mode, for example, 36 pieces are formed at intervals of 10 °, and the interval dimension between adjacent engaging claws 15 is set to half of the width dimension of one engaging claw 15. .

  FIG. 3A is a plan view of the second embodiment. In this embodiment, three notches 7 are formed on the outer periphery of the screw lid 1 at equal intervals. In the third embodiment shown in FIG. 3B, four notches 7 are formed on the outer periphery of the screw lid 1 at equal intervals. 3A and 3B, the tapper evidence band can employ either the type of the first embodiment or the type of the second embodiment.

  When the type of the first embodiment is adopted, the formation positions of the upward projection 13 and the downward fitting groove 14 can be arbitrarily set. For example, in the case of FIG. It is possible to position the groove 14 at the position of one notch 7, and in the case of FIG. 3B, the pair of the upward projection 13 and the downward fitting groove 14 is positioned at the position of the notch 7, respectively. It is possible to make it.

(3). Others The present invention can be embodied in addition to the above embodiments. For example, a knurled portion can be formed at each notch. In this case, for example, the pitch and height can be the same as the knurl portion of the arc-shaped portion of the illustrated embodiment, or the pitch and height of the knurl portion of the arc-shaped portion can be halved. It is. Five or more cutouts may be formed, or cutouts having different widths may be formed.

  Further, although not within the scope of the claims, it is possible to form a notch similar to that of the present invention in a screw lid that does not include a tapper evidence band.

It is a figure which shows 1st Embodiment. It is a figure which shows 2nd Embodiment. It is a figure which shows 3rd-4th embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Screw cover 2 Tupper evidence band 3 Cylinder part 4 Top plate 7 Notch 8 Knurl 11 Bridge part 12 Ratchet claw

Claims (2)

It consists of a screw lid formed by integrally providing a top plate at the upper end of a cylindrical portion having an inner thread formed on the inner periphery, and a tupper evidence band integrally provided at the lower end of the cylindrical portion. Substantially flat cutouts are formed at a plurality of locations separated along the circumferential direction, and the portion between the adjacent cutouts on the outer periphery of the cylindrical portion has an arc shape with the same radius of curvature. Yes,
Pill fur proof cap made of synthetic resin. Two to four notches are formed at substantially equal intervals in the circumferential direction, and have an angle spread of 50 to 60 ° in plan view, while the arcuate portion has a vertically long shape. A large number of knurls are formed,
A synthetic resin pilfer-proof cap according to claim 1.

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