JP5217303B2 - Tamper-proof mouth cap - Google Patents

Description

  The present invention relates to a spigot with a tamper-resistant function made of a synthetic resin, which a beverage container or the like has.

  Conventionally, for plastic containers such as plastic bottles, synthetic resin stoppers having an unauthorized opening prevention function have been proposed. The cap with an unauthorized opening preventing function includes a spout integrated with the container and a spout attached to the liquid paper container, and a cap having an inner thread corresponding to the outer thread on the outer peripheral surface of the spout mouth. The main body and a tamper-evident ring that can be engaged with a rib located over the outer peripheral surface of the mouth portion at the lower portion of the outer screw portion are connected by a plurality of severable connecting portions, and are connected to the spout. When the cap main body is rotated in the opening rotation direction (cap removal direction) in the attached state, a plurality of connecting portions between the tamper-evident prevention ring can be cut and opened.

In the above plug, the tamper-evident ring is left on the spout side after opening the cap body in the opening rotation direction, but the material that molded the container body and spout is different from the material that formed the cap. In view of recycling, it is desired to remove the tamper-evident ring from the spout before the container is discarded.
From this point, as shown in Patent Document 1, a vertical slit is put in a part of the tamper-evident prevention ring, a cuttable bridge is arranged in the slit part, and a toe or the like is placed in the slit part. A structure has been proposed in which the tamper-resistant ring remaining on the spout side can be easily removed when necessary by cutting the bridge, for example, by inserting.
In addition, the cap body and the tamper-evident ring are connected in part, and the tamper-evident ring itself is provided with a weakened part in the vicinity of the part connected to the cap body side. There has been proposed a device that, when rotated, the tamper-evident ring is cut at the weakened portion, and the tamper-evident ring is continuously pulled up and removed from the cap body (for example, Patent Documents 2 and 3). 4).
JP 2003-054597 A Japanese Patent Publication No. 04-040267 Japanese Patent Publication No. 06-088602 Japanese Utility Model Publication No. 03-075150

  As described above, a tamper-evident ring is provided at the bottom of the cap body via a plurality of connecting portions, and the tamper-evident function is provided so that the tamper-evident ring is connected to the cap body and can be removed at the time of opening. The present applicant has also proposed a plug, which will be described below with reference to FIGS.

FIG. 1 shows a spigot 1 with a tamper-evident preventing function. The spout 1 is formed so as to be attached to a paper container, and a cap 3 is screwed to the spout 2. In the cap 3, a normal cap main body that moves upward in the mouth height direction while rotating in the opening rotation direction around the mouth of the spout 2 to open the spout 2. 4 and a tamper-evident ring 6 connected to a lower portion of the cap body 4 by a plurality of severable connecting portions 5.
The tamper-evident prevention ring 6 has a plurality of locking flaps 7 as locking means on the inner peripheral side of the ring as shown in FIGS. 3 and 4, and each of the locking flaps 7 starts from the ring lower edge portion 8. It protrudes toward the center and is provided so as to be able to rotate in the ring height direction with the ring lower edge 8 side as a fold.
Since the cap 3 is screwed, when the cap 3 is attached to the spout 2, it moves downward in the mouth height direction as the cap body 4 rotates around the mouth in the capping rotation direction (cap attaching direction). Then, the tamper-evident prevention ring 6 also moves downward in the mouth height direction with rotation around the mouth portion. If each of the locking flaps 7 is moved downward in the mouth height direction, it comes into contact with an annular rib 9 located over the outer peripheral surface of the mouth at the lower part of the outer threaded portion of the spout 2. Rotate upward so as to be pushed up by the annular rib 9 and retract to the inner peripheral side of the ring, and after turning over the annular rib 9, it rotates to return to the original state and is positioned below the annular rib 9. .
Here, as shown in FIG. 2, each of the locking flaps 7 is provided so as to be in contact with the outer peripheral surface 10 of the mouth under the annular rib 9 and inclined obliquely upward. When opening the cap, if the cap body 4 of the cap 3 is rotated in the opening rotation direction, the rotation in the opening rotation direction around the mouth of the cap body and the movement in the upper direction of the mouth height are accompanied. The tamper-evident ring 6 also rotates in the opening rotation direction around the mouth and moves upward in the mouth height direction, and the tamper-open ring 6 with the locking flap 7 tilted obliquely upward. Is moved upward in the mouth height direction, each of the locking flaps 7 is locked to the annular rib 9, and by this locking, the movement of the unauthorized opening prevention ring 6 in the mouth height direction is restricted. Yes.
When the unauthorized opening prevention ring 6 starts to move upward in the mouth height direction, the locking flap 7 is immediately locked to the annular rib 9, and the unauthorized opening prevention ring 6 accompanying the cap body at the time of opening. The amount of movement of the rotation around the mouth portion and the amount of movement upward in the mouth height direction are not large.

Further, the tamper-evident prevention ring 6 is divided in part, and a portion where the divided ends 11 face each other is formed as a vertical thin slit. Further, a severable connecting portion 12 that connects the divided ends 11 (ring lower edge portions) to each other is provided at a lowermost portion between the divided ends 11, that is, a portion where the ring lower edge portions 8 face each other. For ease of explanation, the space between the opposed divided ends in FIG. 1 is shown wide.
Furthermore, in order to remove the tamper-evident ring 6 from the mouth of the spout 2 by removing the cap body 4, one split end 11 (on the downstream side in the opening rotation direction) facing the connecting portion 12 therebetween. ) And the other split end 11 (on the upstream side of the opening rotation direction), the one split end 11 is provided with a reinforcing connecting portion 13 (see FIG. 1). The split end 11 and the cap body 4 are connected, and one split end 11 is provided so as to accompany the cap body 4 so as to generate a pulling force in the circumferential direction of the tamper-proof ring 6 when necessary. ing.

(Strength of connecting part)
As described above, in this plug with an unauthorized opening preventing function, a plurality of connecting portions are cut when the cap body is rotated in the opening rotation direction during opening. The strength of this connecting part is that the cap body rotates around the mouth part against the tamper-evident ring that is restricted from moving upward in the mouth height direction by a plurality of retaining flaps that are locked to the annular rib. It is set as the intensity | strength cut | disconnected when it leaves | separates by the movement to the upper direction of a mouth part accompanied by.
(Strength of reinforced joints)
Further, when the cap body is rotated in the opening rotation direction, one of the divided ends is reliably lifted upward in the mouth height direction via the reinforcing connecting portion. Therefore, the strength of the reinforced connecting portion is not cut against the tensile force applied to the reinforced connecting portion when removing the cap, and one split end is associated with the cap body that moves upward in the mouth height direction. It is said that it is strong enough.

(Connection strength)
Further, when the cap body is rotated in the opening rotation direction, the connecting portion is cut almost simultaneously before and after the cutting of the plurality of connecting portions. This is intended to cut the connecting portion by utilizing the fact that the locking flap is locked to the annular rib.
In other words, if the connecting portion is disconnected while the connecting portion is not cut at all, the force from the locking flap locked to the annular rib acts to open the unauthorized opening prevention ring itself. This is because the locking flap is released from the annular rib and the tamper-evident prevention ring is lifted upward in the mouth height direction.
It is not inconvenient for the tamper-evident ring to be removed from the spout, but if the tamper-evident ring is removed from the spout while the tamper-proof ring is positioned along the lower end of the cap body, the tamper-evident ring will be removed after opening. The manual operation of separating the cap from the cap body becomes troublesome, and the possibility of closing the spout with the cap body with the tamper-evident ring attached increases.
In addition, the cap that has been removed from the spout with the tamper-evident ring positioned along the lower end of the cap body is intentionally put back on the spout with the tamper-evident ring attached, as if unopened. There is a possibility that mischief to be shown in. In that case, it cannot be easily determined from the appearance that the plug has been opened once, and the function of preventing unauthorized opening cannot be exhibited.

Therefore, the strength of the connecting portion is determined by the ring circumferential direction of the tamper-evident ring when the movement of the tamper-evident ring is restricted upward by the engagement of the latching flap to the annular rib at the time of opening. The strength is such that it is uncut against the pulling force that is generated. Then, when the connecting portion is cut by the upward movement in the mouth height direction accompanying the rotation of the cap body around the mouth portion, the pulling force (the locking flap is locked to the annular rib and the ring circumferential direction is It is desirable to transmit a greater pulling force) to the one split end and to the connecting portion so that the connecting portion is cut off.
In this way, when opening the cap body, turning the cap body in the opening rotation direction cuts the connecting part and moves the cap body from the bottom of the rib as the cap body moves upward in the mouth height direction. It is designed to come off.
The reinforced connecting portion can be cut by manually pulling the cap body and the tamper-evident ring off after removing the cap from the spout.

On the other hand, as described below, the connecting portion needs to be strong enough not to be cut when the cap is attached.
When this cap is attached to the spout for the first time, the cap body moves downward in the mouth height direction while rotating in the direction of capping rotation around the mouth, and accordingly, the tamper-evident ring is also capped around the mouth. It moves downward in the mouth height direction while rotating in the rotation direction. Then, the tamper-evident ring is moved downward in the mouth height direction, and as described above, when each of the locking flaps gets over the annular rib, it is rotated so as to bend upward and retract to the inner peripheral side of the ring. To do.
At this time, a pulling force is generated in the ring circumferential direction at the ring lower edge of the tamper-evident ring. In this case, the cutting of the connecting part results in a defective plug as a product, and the process of manufacturing the plug and checking the quality of the connecting part before shipment of the filled container become very complicated, and therefore the ring when the cap is attached It is necessary to prevent the connecting portion from being cut even by a tensile force along the circumferential direction.
For this reason, the strength of the connecting portion is currently increased, but even if the locking flap is locked to the annular rib by turning the cap body in the opening rotation direction, this connection It becomes difficult to cut the part, and even if the connecting part is cut, the locking flap moves somewhat in the opening rotation direction while being locked to the annular rib, and the unauthorized opening prevention ring is moved upward in the mouth height direction. (The cap body and the tamper-evident ring are connected via the reinforced connecting portion), and the pressure with which the locking flap is locked to the annular rib may increase. Therefore, the torque which rotates a cap main body at the time of opening becomes large, and the problem that the opening operativity on the general consumer side worsened had arisen.

Therefore, in view of the above circumstances, the present invention does not cut the connection portion positioned between the split ends of the tamper-evident prevention ring when attaching the cap, and when opening the connection portion, the connection portion is appropriately cut to prevent tampering. ring is an object to Rukoto it away easily, in tamper-resistant spout, without compromising the tamper evident and requires a large torque when rotating the cap body unplugging direction of rotation The object is to obtain a plug that can be opened without any trouble.

(Invention of Claim 1)
The present invention has been made in consideration of the above-mentioned problems, and is made of a synthetic resin having an outer threaded portion on the outer peripheral surface of the mouth and provided with an annular rib at the lower portion of the outer threaded portion over the outer peripheral surface of the mouth. The outlet is a cap plugged with a synthetic resin cap having an internal thread corresponding to the external thread of the spout,
The cap has a cap body that moves upward in the mouth height direction while rotating in the opening rotation direction around the mouth of the spout, and a plurality of caps that can be cut at the bottom of the cap body. It consists of a tamper-evident ring that is connected to the cap body at the connecting part,
The tamper-evident ring is provided with a plurality of locking flaps along the inner circumferential side of the ring with a gap between adjacent locking flaps, and the locking flap is closed and the annular ribs are closed. When the tamper-evident ring is moved upward in the mouth height direction around the mouth while rotating in the opening rotation direction around the mouth, the annular rib is located in a position corresponding to the lower mouth. To lock,
And the unauthorized opening prevention ring is divided, and the divided ends are connected to each other via a connecting portion that is located between the divided ends and can be cut,
A reinforcing connecting portion is provided at one split end of one split end on the downstream side in the opening rotation direction and the other split end on the upstream side in the plug rotation direction facing each other with the connection portion in between. In the plug with a tamper-evident prevention function in which the one split end and the cap body are connected via a connecting portion,
A vertical rib continuous to the annular rib is provided on the outer peripheral surface of the mouth part below the annular rib, and the locking flap of the tamper-evident ring that rotates around the mouth part by rotation of the cap body can contact the longitudinal rib. provided,
The locking flap adjacent to the connecting portion on the other split end side moves upward in the mouth height direction while the tamper-evident prevention ring rotates around the mouth in the opening rotation direction, and becomes an annular rib. It is provided at a position where it comes into contact with the longitudinal rib when locked, and is a locking flap for connecting portion cutting,
Only the locking flap that is used as the locking flap for cutting the connecting portion and the locking flap that is adjacent to and upstream of the locking flap in the opening rotation direction are positioned on the folding origin side of the both locking flaps. Continuous through the flap connecting piece,
The locking flap adjacent to the connecting portion on the one split end side and the locking flap adjacent to the locking flap located downstream in the opening rotation direction of the locking flap are adjacent to each other in a discontinuous state. And
A set of a locking flap that is used as the locking flap for cutting the connection portion and a locking flap that is located adjacent to and upstream of the locking flap in the opening rotation direction, and is connected to the one split end side. A set of a locking flap adjacent to each other and a set of adjacent locking flaps located downstream in the opening rotation direction of the locking flap are adjacent to each other with the connecting portion therebetween. The present invention provides a plug with an unauthorized opening prevention function to solve the above-mentioned problems.

(Invention of Claim 2)
In the present invention, a plurality of the vertical ribs may be provided around the mouth portion at intervals.

(Invention of Claim 3)
Further, in the present invention, the tamper-evident ring is divided at a plurality of locations, and the connection portion that connects the divided ends is arranged for each divided portion, and each of the divided ends of the divided portions is the reinforced connecting portion. The longitudinal ribs can be connected to the cap body via the same number as the number of divisions of the tamper-evident ring.

(Invention of Claim 4)
Further, in the present invention, the one side surface, which is the upstream side in the opening rotation direction of the vertical rib, is perpendicular to the outer peripheral surface of the mouth at the position of the vertical rib, and the closing rotation is opposite to the opening rotation direction The other side surface which is the upstream side in the direction is inclined with an upward gradient in the capping rotation direction from the outer peripheral surface of the mouth portion at the position of the longitudinal rib to the top portion of the longitudinal rib, and the other side surface is the mouth portion in the capping rotation direction. A locking flap that moves around and contacts the other side surface is guided to the top of the vertical rib, and the locking flap that moves around the mouth in the direction of capping rotation is provided to be able to get over the vertical rib. Can be.

(Delete)

(Invention of Claim 5 )
In the present invention, the flap gap between the locking flap located on the one split end side of the tamper-evident ring and the locking flap located on the other split end side is wider than the other flap gap. It is possible that

(Invention of Claim 6 )
In the present invention, the vertical rib has a rib width dimension around the mouth of the vertical rib positioned on the one split end side of the tamper-evident ring and the other split end side. It is possible to make it smaller than the gap dimension of the flap gap between the locking flaps and larger than the gap dimension of other flap gaps.

(Delete)

(Invention of Claim 7 )
In the present invention, the length of the flap connecting piece in the ring radial direction can be in the range of 1/3 to 2/3 of the length of the locking flap in the ring radial direction. .

(Invention of Claim 8 )
In the present invention, the thickness of the flap connecting piece can be in the range of 1/5 to 1 of the thickness of the locking flap.

(Effect of the invention of claim 1)
According to the invention of claim 1, there is a vertical rib continuous to the annular rib on the outer peripheral surface of the mouth portion below the annular rib, and the locking flap of the tamper-evident ring that rotates around the mouth portion with the cap body. It is provided in contact with the vertical rib.

When a cap is attached to the spout, each of the locking flaps on the inner peripheral side of the tamper-evident ring is in contact with the outer peripheral surface of the mouth in a state of being folded upward, but the lower surface of the annular rib and the locking flap Are not in direct contact with each other, and a gap is provided between the annular rib and the tip of the locking flap.
In this way, even if the cap rotates slightly in the opening rotation direction due to proper handling during the distribution process of goods such as liquid containers with stoppers and store display, the connection part and the connection part are disconnected. I am trying not to. Also, during the opening operation, the tip of the locking flap is not in contact with the lower surface of the annular rib, so there is no resistance at the initial stage of rotating the cap in the opening rotation direction, and the cap can be started to rotate smoothly. .
When the tamper-evident ring is started to rotate in the opening rotation direction along with the movement of the cap body at the time of opening, the locking flaps are not locked to the annular ribs at this point. It can be deformed so as to be pivoted and retracted so as to overlap the inner peripheral surface side of the unsealing prevention ring, and even if these locking flaps come into contact with the vertical ribs, they can get over the vertical ribs without locking. Even if some of the connecting parts may be cut off, it is possible to do so because the opening operation is in progress.

According to the first aspect of the present invention, when the locking flap comes into contact with the vertical rib after the opening operation, if the contacting locking flap does not reach the annular rib, the locking flap is folded from the folding source. Therefore, it moves over the longitudinal rib while being retracted to the inner peripheral side of the ring so as to be folded.
When rotation of the tamper-evident ring is advanced and the locking flap is locked to the annular rib and also contacts the longitudinal rib, the escape of the locking flap to the inner peripheral side of the ring is restricted by the annular rib and folded. Therefore, the vehicle stops at the position in contact with the vertical rib without getting over. And, in the opening rotation direction of the tamper-evident ring, from the portion where there is a locking flap locked to the annular rib and contacting the vertical rib to the portion where the reinforced connecting portion is connected (that is, one split end) Is transmitted from the reinforced connecting portion side in the opening rotation direction, and a pulling force along the ring circumferential direction of the tamper-evident ring is generated.
And, there is a gap between the split ends between the part where there is a locking flap that is locked to the annular rib and abuts against the vertical rib and one split end (around the opening rotation direction). The pulling force is applied to the connecting portion from one split end, so that the connecting portion is easily cut.

When the cap is attached, the locking flaps are locked to the annular rib when opening the cap, compared to the strength of the connection that resists the pulling force that occurs over the ring circumferential direction of the tamper-evident ring when each of the locking flaps gets over the annular rib. It is possible to increase the strength of the connecting part that resists the tensile force generated in the ring circumferential direction from the part with the locking flap that contacts the vertical rib to the part where the reinforced connecting part is connected (when the cap is installed) (The pulling force itself that is generated when the annular rib is moved over is not such a large pulling force because each of the locking flaps retracts).
That is, when the cap is turned with a certain amount of force applied by hand when opening, and the strength of the connecting portion is increased so that the connecting portion is cut, the cap-attached annular flap can be overcome. The strength is sufficient to withstand the tensile force generated in the case.
In addition, when the locking flap is locked to the annular rib and comes into contact with the vertical rib, the movement of the portion where the locking flap is stopped stops, and the rotational force transmitted from the reinforced connecting portion side to one split end side is a large pulling force. This acts on the connecting portion instantaneously, and the connecting portion is disconnected.
Accordingly, the connection portion can be reliably cut at the time of opening, and the opening operation can be performed without increasing the necessary rotational torque.
As described above, when opening the cap, the cap body rotates around the mouth in the opening rotation direction and moves upward in the mouth height direction, and the tamper-evident ring is also moved around the mouth along with the movement of the cap body. It rotates in the opening direction and moves upward in the mouth height direction. Then, the locking flap is locked to the annular rib by moving upward in the mouth height direction, the locked locking flap is in contact with the vertical rib, and the locking flap that is in contact with the vertical rib is located. A tensile force is applied from one portion to one split end where the reinforcing connecting portion is located, and the connecting portion is cut.
The cutting of the connecting portion separates one split end from the other split end, and the other split end begins to open outwardly from the mouth, and the tamper-evident ring starts to open, and the locking flap ring By the locking to the rib, a pulling force in the mouth height direction is applied to the connecting portion, and the connecting portion is also cut before and after the cutting of the connecting portion.
In this way, the locking flap comes into contact with the vertical rib to generate a pulling force for cutting the connecting portion, but the locking flap is locked to the annular rib and the movement is restricted. Even so, the locking flap may be crushed in the circumferential direction of the ring when it comes into contact with the vertical rib, and the locking to the annular rib may also be loosened due to the crushed.
Therefore, according to the present invention, the locking flap located on the other split end side is reinforced by being connected to the adjacent locking flap, and can be easily prevented from being crushed when contacting the vertical rib.

(Effect of the invention of claim 2)
The locking flap that locks to the annular rib by the rotation in the opening direction and the upward movement in the mouth height direction at the time of opening is in the proper position when the cap is attached. Therefore, it is desirable that the cap assembly accuracy with respect to the spout is increased to some extent. However, according to the invention of claim 2, since a plurality of vertical ribs are provided, the cap assembly accuracy with respect to the spout is increased so much. There is no need.

(Effect of the invention of claim 3)
According to the invention of claim 3, when the cap body is rotated in the opening rotation direction, the tamper-evident ring is divided into a plurality of parts so that the locking relation with the annular rib is immediately released, Opening operation becomes easy.

(Effect of the invention of claim 4)
As described above, when the cap is attached, the tamper-evident ring is moved downward in the mouth height direction while rotating in the closing rotation direction around the mouth as the cap body moves. The tamper-evident ring is moved slightly downward in the mouth height direction while rotating in the closing rotation direction around the mouth portion even after the locking flap has passed over the annular rib. At this time, some of the locking flaps rotating in the closing rotation direction come into contact with the vertical ribs. According to the invention of claim 4, the locking flaps get over the vertical ribs while being guided by the inclined side surfaces of the vertical ribs. Thus, the tamper-evident ring can be smoothly rotated without the locking flap strongly contacting the vertical rib, and it is possible to more easily avoid applying unnecessary pulling force to the connecting portion when the cap is attached.

(Delete)

(Effect of the invention of claim 5 )
According to the fifth aspect of the present invention, the flap gap between the locking flap located on one divided end side and the locking flap located on the other divided end side is widely provided in the ring circumferential direction. Then, if the vertical rib is made to correspond to one split end side in the wide flap gap in the ring circumferential direction, the opening side of the other split end side until the locking flap moves and abuts the vertical rib. It is easy to ensure a long movement amount of the locking flap, and it is possible to lock the annular rib until the locking flap on the other split end comes into contact with the vertical rib.
Therefore, it is easy to apply a tensile force for cutting the connecting portion in the vicinity by locking the locking flap on the other divided end side with the annular rib and contacting the vertical rib. Become.

(Effect of the invention of claim 6 )
In general, an error with respect to the cap and spout shape and thread pitch is extremely small, and the cap and spout are accurately formed. And when creating a cap, the cap is screwed into the spout, and the amount of rotation when the cap is attached to the spout is also set. For example, when the connecting portion of the tamper-evident ring reaches the setting position of the spout, the cap rotation is finished.
However, although it does not constitute a product defect, there is a possibility that the amount of rotation in the closing rotation direction of the cap becomes slightly large and can be screwed deeply. And, in this case, the gap between the tip of the folded locking flap (the portion in contact with the outer peripheral surface of the mouth below the annular rib) and the annular rib is slightly larger than the set interval, After the locking flap that rotates in the opening rotation direction around the mouth abuts the vertical rib, the number of locking flaps that go over the vertical rib and proceed further increases (about one or two).
After this, if the locking flap locked to the annular rib comes into contact with the vertical rib, the connection portion is cut with an appropriate tensile force, but as described above, the locking flap that does not lead to the cutting of the connection portion. Since there is contact with the vertical rib, there is a possibility that the smoothness of rotation is impaired before the connection portion is cut by rotation in the opening rotation direction. In particular, if the flap gap formed between the locking flaps that will get over the vertical rib is wide enough to allow the vertical rib to enter, the contact with the locking flap when entering the flap gap There may be some resistance.
Therefore, according to the invention of claim 6 , the rib width dimension around the mouth portion of the vertical rib is the gap dimension of the flap gap between the locking flap on one split end side and the locking flap on the other split end side. Because it is smaller and larger than the interval size of other flap gaps, when the cap is attached, the vertical rib corresponds to the part of the arrangement of the locking flaps where the flap gap is smaller than the rib width dimension of the vertical rib Even if it does, a vertical rib does not enter the gap of the flap at the time of opening. Therefore, when the tampering prevention ring starts to rotate when the plug is opened, the locking flaps that are not locked to the annular rib do not come into strong contact with the vertical ribs, and the cap body is further opened at the time of opening. It can be rotated smoothly, and the torque for rotation can be further reduced.

(Delete)

(Effect of the invention of claim 7 )
According to the invention of claim 7 , the connection state of the both locking flaps is further improved.

(Effect of the invention of claim 8 )
According to the invention of claim 8 , the connection state of the both locking flaps is further improved.

Next, the technology studied in reaching the present invention will be described in detail based on the illustrated embodiment. 1 to 4 are denoted by the same reference numerals, and the description thereof is omitted.
(Vertical rib)
FIG. 5 shows a mouth plug 1 with an unauthorized opening preventing function of the studied technique . First, the configuration of the mouth portion under the annular rib 9 of the spout 2 is different from the example shown in FIGS. As shown in the spout 2, a longitudinal rib 14 that is continuous with the annular rib 9 and the proximal end portion of the mouth is integrally provided on the outer peripheral surface 10 of the mouth below the annular rib 9. The two vertical ribs 14 are arranged at equal intervals around the mouth.
Further, each of the vertical ribs 14 has a shape in which the cross section protrudes outward in the radial direction of the mouth portion, and becomes the upstream side in the opening rotation direction A of the two side surfaces facing each other around the mouth portion. One side surface 15 is perpendicular to the outer peripheral surface of the mouth portion at the position of the longitudinal rib as shown in FIG. 6, and is upstream in the closing rotation direction B that is opposite to the opening rotation direction A. The other side surface 16 is inclined with an upward gradient in the closing rotation direction B from the mouth outer peripheral surface 10 at the vertical rib position to the vertical rib top.

Thus, in each of the vertical ribs 14, one side surface 15 becomes a right angle and the other side surface 16 is inclined. If it is assumed that the tamper-evident prevention ring 6 does not move in the mouth height direction but rotates only around the mouth portion and continues to apply torque for rotation, the ring inner peripheral surface side is locked. When the unauthorized opening prevention ring 6 rotates in the opening rotation direction A, the flap 7 comes into contact with the one side surface 15 and a certain amount of stress is generated at the time of the contact. It folds up to the inner peripheral surface side and rides on the top of the vertical rib 14, and then goes down the other side surface 16 from the vertical rib 14 and proceeds forward. When rotating in the capping rotation direction B, when it comes into contact with the other side surface 16, it is gradually folded up and guided to the top of the vertical rib 14 by this inclined side surface 16, and then comes off from the vertical rib 14 first. Thus, when the locking flap 7 moves in the closing rotation direction B, it is provided so as to get over the vertical rib 14 with almost no resistance.
As described above, in order to allow the locking flap 7 to pass through the top of the vertical rib in either the movement in the opening rotation direction A or the movement in the closing rotation direction B, the vertical rib The outward projecting amount of 14 is the same as the projecting amount of the annular rib 9. (Fig. 7)

(Tamper-proof ring)
The cap 3 in the plug 1 with the unauthorized opening prevention function of the studied technique is also different from the example shown in FIGS. First, the unauthorized opening prevention ring 6 of the cap 3 is divided at two positions, and the number of divisions of the unauthorized opening prevention ring 6 and the number of the vertical ribs 14 are made to correspond to each other. The distance between the two split ends 17 is in a position facing the ring radial direction, and the connection portion 12 is located so as to extend over the position of the ring lower edge portion 8 in each split end 17. The divided end 11 is connected to the other divided end 11. (See Figure 8)

(Flap gap)
Moreover, arrangement | positioning of the latching flap 7 of the unauthorized opening prevention ring 6 is shown by FIG. 8 (FIG. 8 has shown the state seen from the bottom). As shown in FIG. 8, this examination technique includes eight locking flaps 7, and the flap gaps 18 between the adjacent locking flaps 7 are not all evenly spaced. As shown in the figure, the width of the flap gap 18 between the locking flap 7 on the one split end 11 side and the locking flap 7 on the other split end 11 side is widened along the ring circumferential direction. The flap gap 18 has a narrow width along the circumferential direction of the ring. The wide flap gap 18 provided wide is positioned so as to oppose the ring radial direction, and the vertical rib 14 of the spout 2 corresponds to the wide flap gap 18 as shown in FIG. doing. That is, the wide flap gap 18 is formed as a portion where the vertical rib 14 is located. FIG. 9 shows a state viewed from above. Further, in the spigot 1 of the present study technique , the vertical ribs 14 are set so as to be close to the locking flaps 7 on the one split end 11 side in the wide flap gap 18 as will be described later. Yes.

(Attaching the cap to the spout)
When the cap 3 is attached to the spout 2, the tightening torque value of the cap 3 in the closing rotation direction is determined, and the cap 3 is set in the closing rotation direction B after the cap 3 is put on the spout 2. It is attached using an attachment machine so that it can be screwed with a tightening torque value.
By the rotation in the plugging rotation direction B, the cap body 4 and the unauthorized opening prevention ring 6 are integrally moved and moved downward in the mouth height direction with the rotation, and the unauthorized opening prevention ring 6 as described above. When each of the locking flaps 7 reaches the position of the annular rib 9, it gets over the annular rib 9 in a folded state.
(Getting over the vertical rib of the locking flap-direction of capping rotation)
Furthermore, even after moving below the annular rib 9, the amount of rotation and the amount of downward movement are not so much, but there are rotation in the closing rotation direction B and downward movement in the mouth height direction, In the locking flap 7 that comes into contact with the vertical rib 14 by the rotation in the closing rotation direction B, it is folded up on the other inclined side surface 16 to get over the vertical rib 14 and proceed further. When the cap 3 is screwed at the set tightening torque value and stopped, the vertical rib 14 is positioned in the wide flap gap 18 and the vertical flap 14 is engaged with the locking flap 7 on the one split end 11 side. The ribs 14 are close to each other. (Fig. 9)

(Wide flap gap)
As described above, in the plug 1 with the unauthorized opening preventing function in the examination technique , the vertical rib 14 of the spout 2 is located in the wide flap gap 18 among the flap gaps 18 between the adjacent locking flaps 7. . As shown in the drawing, the gap dimension of the wide flap gap 18 is sufficiently larger than the rib width dimension 19 around the mouth of the vertical rib 14, and the opening rotation of the tamper-evident ring 6 is rotated as shown below. When the locking flap 7 on the other split end 11 side comes into contact with the vertical rib 14 located near the locking flap 7 on the one split end 11 side by rotation in the direction A, this other split The engaging flap 7 on the end 11 side is provided so as to move upward in the mouth height direction and engage with the annular rib 9, and upward necessary for engaging the engaging flap 7 with the annular rib 9. The width of the wide flap gap 18 is set so as to be the amount of rotation that can be obtained.

(Locking flap for cutting connection part)
That is, in this examination technique , when opening the cap, the cap body 4 is rotated in the opening rotation direction A, and the unauthorized opening prevention ring 6 is rotated (around the mouth) and moved (mouth) along with the cap body 4. The locking flap 7 of the other split end 11 at the position adjacent to the connection portion 12 on the upstream side in the opening rotation direction A with respect to the position of the connection portion 12 is a vertical rib. 14 is abutted against.
And the said latching flap 7 by the side of the other division | segmentation end 11 is set as the latching flap 7a for cut | disconnecting the connection part 12, and when the vertical rib 14 contact | abuts, the connection part 12 is cut | disconnected. The pulling force to be generated is generated in the ring circumferential direction of the unauthorized opening prevention ring 6.
More specifically, when the cap body 4 is moved by the opening operation, the unauthorized opening prevention ring 6 moves upward in the opening height direction while rotating in the opening rotation direction A around the opening portion, and the other division. The locking flap 7a on the end 11 side moves in the opening height direction while moving in the opening rotation direction A. And if it latches to the annular rib 9 by the movement of an opening | mouth part height direction, it will become difficult to produce the folding up which overlaps with the ring inner peripheral surface side. When it is locked to the annular rib 9 by moving upward in the mouth height direction, it is provided so as to come into contact with the vertical rib 14 by moving in the opening rotation direction A and cannot be retracted to the inner peripheral surface side of the ring. Since the latching flap 7a is in contact with the vertical rib 14, the portion of the unauthorized opening prevention ring 6 where the latching flap 7a is located is fixed without moving. (FIGS. 10 and 11)
In addition, in order to ensure engagement with the vertical rib, the shape of the locking flap 7a is preferably a shape that substantially coincides with the radial direction on the side in contact with the vertical rib 14.
Moreover, since the force which rotates the one division | segmentation end 11 from the cap main body 4 side continues through the reinforcement | strengthening connection part 13 to one division | segmentation end 11 to which the reinforcement | strengthening connection part 13 is connected, in the opening rotation direction A The tensile force extends from the contact flap corresponding portion C where the locking flap 7a which is locked to the annular rib 9 and is in contact with the vertical rib 14 is located to the strengthen connection portion corresponding portion D where the strengthen connection portion 13 is connected. The locking flap 7a does not move, the pulling force from the reinforcing connecting portion 13 side to the reinforcing connecting portion corresponding portion D continues to be applied, and the abutting flap corresponding portion C to the reinforcing connecting portion corresponding portion. Since the connecting portion 12 is positioned between D, the tensile force acting on the connecting portion 12 increases instantaneously, and the connecting portion 12 is disconnected by this pulling force.

The wide flap gap 18 itself is sufficiently shorter than the inner circumferential length of the unauthorized opening prevention ring 6. For example, it is shorter than ¼ of the inner peripheral length of the tamper-evident prevention ring 6, and in this study technique , the locking flap 7, the vertical rib 14, the reinforced connecting portion 13 of the other split end 11, Although there are two sets in which are arranged, they are arranged in the ring radial direction and do not approach each other.
Further, the distance between the contact flap corresponding part C and the reinforced connecting part corresponding part D is short, so that the pulling force does not cause the tampering prevention ring 6 itself to stretch, and the pulling force is properly applied to the connecting part 12. I try to join.

In the examination technique , as described above, the locking flap 7a adjacent to the connecting portion 12 on the other split end 11 side is used as a locking flap for cutting the connecting portion 12, and the gap of the wide flap gap 18 is set. When the tamper-evident prevention ring 6 rotates around the mouth in the opening rotation direction A and moves upward in the mouth height direction and engages with the annular rib 9, it comes into contact with the longitudinal rib 14. Provided in position.

(Locking flaps other than locking flaps for cutting connection parts)
As described above, in the main plug 1, the locking flap 7 on the upstream side in the opening rotation direction A in the wide flap gap 18 serves as the locking flap 7 a for cutting the connection portion 12, and the cap 3 is Although the vertical ribs 14 are positioned in the wide flap gap 18 when attached to the spout 2, depending on the cap attachment, the amount of rotation of the cap 3 in the closing rotation direction B increases and the cap 3 is deeply inserted. 2, the vertical rib 14 is shifted to a position downstream of the wide flap gap 18 in the opening rotation direction A, and has a narrow flap gap 18 or the narrow flap gap 18. There is also a possibility that the vertical ribs 14 of the flap 7 are located (FIG. 12).
When the opening operation is performed in this state, contact between the locking flap 7 forming the narrow flap gap 18 and the vertical rib 14 occurs first, but the connection portion 12 is cut depending on this contact. The large pulling force required for this is not generated. That is, when the unlocking operation is performed, the locking flap 7 that moves in the opening rotation direction A and contacts the one side surface 15 of the longitudinal rib 14 to form the narrow flap gap 18 contacts the locking flap 7. Since the ring is not locked to the annular rib 9, it is folded back so as to overlap the inner peripheral surface side of the ring by contact with the vertical rib 14, so as to go over the vertical rib 14 and proceed further. Become. Also, the narrow flap gap 18 is not wide enough to obtain a sufficient rotation distance, and the tensile force generated instantaneously by contact with the vertical ribs 14 does not become large, and the connecting portion 12 is not cut. . If the unauthorized opening prevention ring 6 rotates in the opening rotation direction A and the vertical rib 14 moves to the wide flap gap 18, the connecting portion 12 is properly cut in the above-described procedure.

(Narrow flap gap)
Further, the narrow flap gap 18 other than the wide flap gap 18 is provided smaller than the rib width dimension 19 of the vertical rib 14, and the narrow flap gap 18 is formed when the rotation operation is performed at the time of opening. Even if the vertical rib 14 is approaching, when the overcoming of the one locking flap 7 to the vertical rib 14 is over, the vertical rib 14 is already in contact with the next locking flap 7, and the momentum is increased. Since there is no strong contact, there is no pulling force that cuts the connecting portion 12. When the vertical ribs 14 come out of the wide flap gaps 18 from the arrangement of the locking flaps 7 having the narrow flap gaps 18, the vertical ribs 14 move relatively with a certain degree of momentum. Therefore, the connecting portion 12 can be easily connected to the locking flap 7 of the other divided end 11 relatively strongly and because the locking flap 7 is also locked to the annular rib 9. And it comes to be cut reliably.
The narrow flap gap 18 does not necessarily need to be narrower than the rib width dimension, and it is sufficient if there is a large difference in dimension with the wide flap gap 18.

In the above examination technique , the locking flap 7 of the other split end 11 adjacent to the connecting portion 12 upstream of the opening opening rotation direction A in the wide flap gap 18, that is, the connecting portion cutting locking flap 7 a. And the narrow flap gap 18 between the locking flaps 7a adjacent to each other on the upstream side in the opening rotation direction A of the connecting portion cutting locking flap 7a is similar to the other narrow flap gaps 18. It is provided as a gap reaching the inner peripheral surface of the ring.
Next, the present invention will be described with reference to FIGS. In the present invention, as shown in FIGS. 13 and 14, the flap connecting piece 20 is provided in the narrow flap gap 18 between the connecting portion cutting locking flap 7a and the locking flap 7 adjacent thereto. It is provided .
(Flap connecting piece)
In the illustrated example, the flap connecting piece 20 is formed on the folding origin side of the both locking flaps 7 so as to be continuous with the both locking flaps 7. The locking flap 7 is continuous. In this way, when the locking flap 7 (7a) for cutting the connecting portion and the locking flap 7 adjacent on the upstream side in the opening rotation direction A are made continuous via the flap connecting piece 20, when the plug is opened. The rigidity around the mouth of the connecting portion cutting locking flap 7a is improved against the contact between the vertical rib 14 and the connecting portion cutting locking flap 7a . Therefore, in the unauthorized opening prevention ring 6, as shown in FIG. 13, the set of the locking flap 7 (7a) for cutting the connection portion and the locking flap 7 adjacent on the upstream side in the opening rotation direction A thereof, A set of a locking flap 7 that is adjacent to the connecting portion 12 on the one split end 11 side and a locking flap 7 that is adjacent to the locking flap 7 that is located downstream in the opening rotation direction A. The connecting parts 12 are adjacent to each other. Therefore, even if the vertical ribs 14 come into strong contact with each other, the connecting portion cutting locking flaps 7a are not easily crushed, and the state in which the connecting ribs 12 are more reliably locked to the annular rib 9 is maintained. The pulling force for cutting can be generated more reliably.

In the flap connecting piece 20, the length dimension 21 in the ring radial direction is equal to the length dimension in the ring radial direction of the locking flap 7 (the length dimension at the side along the flap gap 18). more preferably in the range of 2/3 1/3, also, thickness 22 of the flap connecting piece 20, and more preferable arbitrariness in the range 1/5 1 of thickness of the locking flap.

In each of the above examples , the opening operation is performed by reducing the strength of the vertical rib 14 when the locking flap 7a for cutting the connecting portion contacts the one side surface 15 of the vertical rib 14 by moving in the opening rotation direction A. Thus, when the locking flap 7a comes into contact, the longitudinal rib 14 is deformed and destroyed, and the connecting portion is cut under the tensile force generated by the contact that causes deformation and destruction of the longitudinal rib 14. In addition, the strength of the connecting portion at which the connecting portion is cut can be set.
Opening in this way destroys the vertical ribs and properly removes the tamper-evident ring, so that the same cap with the tamper-evident ring is intentionally attached to the opened spout. Since the vertical rib itself has already been destroyed, even if the locking flap for cutting the connecting portion comes into contact, there is no pulling force to cut the connecting portion, only the connecting portion is cut. The cap body is rotated while the tamper-evident ring is left on the mouth portion, which can indicate that the cap has been opened in advance. Furthermore, if the reinforced connecting part is also easy to cut, the tamper-evident ring itself will remain in the mouth, clearly indicating that it has been opened in advance, and the addition of this configuration makes it more illegal. The opening prevention function can be enhanced.

It is explanatory drawing which shows the stopper with a tampering prevention function examined previously. It is explanatory drawing which shows the attachment state of the example shown in FIG. 1 in a cross section. It is explanatory drawing which shows the cap main body of the example shown in FIG. 1 in a cross section. It is explanatory drawing which shows the latching flap of the example shown in FIG. It is explanatory drawing which shows the stopper with a tampering prevention function in examination technology . It is explanatory drawing which shows the vertical rib of the spout in examination technology in a mouth part cross section. It is explanatory drawing which shows the vertical rib of the spout in examination technology by a mouth part vertical cross section. It is explanatory drawing shown in the state which looked at the latching flap of the unauthorized opening prevention ring in examination technology from the bottom. It is explanatory drawing shown in the cross section which looked at the unauthorized opening prevention ring and the vertical rib of the spout in the examination technique from the top. It is explanatory drawing which shows the state which the latching flap latched in the cyclic | annular rib in the examination technique in a longitudinal cross-section. It is explanatory drawing which shows the state which the latching flap similarly latched to the annular rib in a cross section. It is explanatory drawing which shows the state in which the cap was attached deeply. It is explanatory drawing which shows the flap connection piece in this invention. It is explanatory drawing which similarly shows a flap connection piece in a cross section.

DESCRIPTION OF SYMBOLS 1 ... Mouth plug with an unauthorized opening prevention function 2 ... Spout 3 ... Cap 4 ... Cap main body 5 ... Connection part 6 ... Unauthorized opening prevention ring 7 ... Locking flap 9 ... Ring rib 11 ... Split end 12 ... Connection part 13 ... Strengthening Connecting part 14 ... Vertical rib 18 ... Flap gap 20 ... Flap connecting piece 21 ... Length dimension in the ring radial direction of the flap connecting piece 22 ... Thickness dimension A of the flap connecting piece A ... Opening rotation direction B ... Closing rotation direction C ... Contact flap corresponding part D ... Strengthening connection part corresponding part

Claims (8)

A synthetic resin spout having an outer threaded portion on the outer peripheral surface of the mouth and an annular rib provided on the outer peripheral surface of the mouth at the lower portion of the outer threaded portion, corresponding to the outer threaded portion of the spout. A cap with a screw made of a synthetic resin having a screw part,
The cap has a cap body that moves upward in the mouth height direction while rotating in the opening rotation direction around the mouth of the spout, and a plurality of caps that can be cut at the bottom of the cap body. It consists of a tamper-evident ring that is connected to the cap body at the connecting part,
The tamper-evident ring is provided with a plurality of locking flaps along the inner circumferential side of the ring with a gap between adjacent locking flaps, and the locking flap is closed and the annular ribs are closed. When the tamper-evident ring is moved upward in the mouth height direction around the mouth while rotating in the opening rotation direction around the mouth, the annular rib is located in a position corresponding to the lower mouth. To lock,
And the unauthorized opening prevention ring is divided, and the divided ends are connected to each other via a connecting portion that is located between the divided ends and can be cut,
A reinforcing connecting portion is provided at one split end of one split end on the downstream side in the opening rotation direction and the other split end on the upstream side in the plug rotation direction facing each other with the connection portion in between. In the plug with a tamper-evident prevention function in which the one split end and the cap body are connected via a connecting portion,
A vertical rib continuous to the annular rib is provided on the outer peripheral surface of the mouth part below the annular rib, and the locking flap of the tamper-evident ring that rotates around the mouth part by rotation of the cap body can contact the longitudinal rib. provided,
The locking flap adjacent to the connecting portion on the other split end side moves upward in the mouth height direction while the tamper-evident prevention ring rotates around the mouth in the opening rotation direction, and becomes an annular rib. It is provided at a position where it comes into contact with the longitudinal rib when locked, and is a locking flap for connecting portion cutting,
Only the locking flap that is used as the locking flap for cutting the connecting portion and the locking flap that is adjacent to and upstream of the locking flap in the opening rotation direction are positioned on the folding origin side of the both locking flaps. Continuous through the flap connecting piece,
The locking flap adjacent to the connecting portion on the one split end side and the locking flap adjacent to the locking flap located downstream in the opening rotation direction of the locking flap are adjacent to each other in a discontinuous state. And
A set of a locking flap that is used as the locking flap for cutting the connection portion and a locking flap that is located adjacent to and upstream of the locking flap in the opening rotation direction, and is connected to the one split end side. A set of a locking flap adjacent to each other and a set of adjacent locking flaps located downstream in the opening rotation direction of the locking flap are adjacent to each other with the connecting portion therebetween. A spigot with a function to prevent unauthorized opening.   The mouth plug with an unauthorized opening preventing function according to claim 1, wherein a plurality of the vertical ribs are provided around the mouth portion at intervals.   The tamper-evident ring is divided at a plurality of locations, and the connection portions that connect the divided ends are arranged for each divided portion, and each of the divided ends of the divided portions is connected to the cap body via the reinforcing connecting portion. The plug with an unauthorized opening prevention function according to any one of claims 1 and 2, wherein the number of the longitudinal ribs connected is the same as the number of divisions of the unauthorized opening prevention ring. One side of the vertical rib that is upstream in the opening rotation direction is perpendicular to the outer peripheral surface of the mouth at the position of the vertical rib, and the upstream side in the closing rotation direction that is opposite to the opening rotation direction. The other side surface is inclined with an upward gradient in the capping rotation direction from the outer peripheral surface of the mouth at the position of the vertical rib to the top of the vertical rib,
The other side is moved around the mouth in the direction of rotation of the plug and the locking flap contacting the other side is guided to the top of the vertical rib, and the movement of the other side is moved around the mouth in the direction of rotation of the plug. The plug with an unauthorized opening preventing function according to any one of claims 1 to 3, wherein the flap is provided so as to be able to climb over the vertical rib. 2. A flap gap between a locking flap located on the one split end side of the tamper-evident ring and a locking flap located on the other split end side is provided wider than the other flap gap. The plug with an unauthorized opening preventing function according to any one of to 4 . The vertical rib has a rib width dimension around the mouth of the vertical rib between the locking flap located on the one split end side of the tamper-evident ring and the locking flap positioned on the other split end side. 6. The plug with a tamper-evident preventing function according to claim 5, which is smaller than the gap dimension of the flap gap and larger than the gap dimension of the other flap gap. Length dimension of the ring radial direction of the flap connecting piece, to any one of claims 1 to 6 1/3 of the length of the ring radial locking flap is in the range of 2/3 Mouth plug with tamper-evident prevention function as described. The plug with a tamper-evident preventing function according to claim 7 , wherein the thickness of the flap connecting piece is in the range of 1/5 to 1 of the thickness of the locking flap.

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