JPH0977104A - Pilfer-proof plastic cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily remove the remaining lower part of a cap when a bottle is recycled, by a method wherein a tearing band is provided below a main closure, a lower band with protrusions to be connected to the bottle is provided below the tearing band and both bands are connected together by a vertical joint. SOLUTION: A narrow-necked bottle 24 has a neck 21 with a single screw thread and a main closure 2 has a screw thread 12 inside corresponding to the screw tread of the neck 21. At least two unsealing annular scores 3 and 4 are formed below the screw thread 12, so that a tearing band 5 with a pull tab at one end to form a tearing start point is formed between the scores 3 and 4. In addition, a lower band 7 having stoppers 13 on the inside is arranged below the tearing band 5 and the stoppers 13 connect to protrusions 23 of the narrow-necked bottle 24 when the main closure 2 is mounted. The lower band 7 is partly connected to the tearing band 5 by a vertical joint so that it can be removed from the main closure 2 by tearing off the tearing band 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a pill fur-proof plastic for narrow mouth bottles capable of dramatically improving the LB angle (Leak and break angle) characteristic, which has recently been attracting attention as an index for preventing unauthorized opening in a plastic cap. It is a cap.

[0002]

2. Description of the Related Art PET bottles for beverages having a bottle neck shape with a narrow mouth, which have been widely used, have already been manufactured by incorporating a technique for preventing unauthorized opening, but the situation is still not sufficient. That is, gradually turning the cap,
The sealing property of the cap becomes weak, and the force due to the pressure difference between the bottle and the external pressure overcomes the sealing force, causing leakage. The angle at which this leak starts is called the leak angle. Then, in normal use of the PET bottle, the user breaks the band that locks the cap and the bottle by further applying a rotational force beyond the leak angle. This state is called a bridge break angle. Exceeding the bridge break angle causes a change in the shape of a part of the cap, which makes it clear that the bottle is used.

However, there is no problem if the difference between the leak angle and the bridge break angle is in the relationship of the following expression (A), but in the case of the condition of the following expression (B), the appearance is apparent. Although it is a normal product, there is a possibility that fraudulent acts such as becoming unsanitary may occur due to carbon dioxide depletion of carbonated drinks, or the ingress of outside air into a supposedly sterile state. There is. (A) Leak angle ≥ Bridge break angle (LB angle) (B) Leak angle <Bridge break angle (LB angle) That is, when the cap is rotated in the opening direction, the bridges provided on the cap are scattered. At least one opening groove provided is ruptured to be in an apparently opened state. Before the change of the outer shape occurs, the sealing property of the cap becomes weak, and the force due to the pressure difference between the inside of the bottle and the external pressure overcomes the sealing force, resulting in a leak state, which causes the above-mentioned problem. In the present application, by making the leak angle and the bridge break angle as close as possible to solve the above-mentioned problems, it is possible to achieve the object by using materials such as plastic and polypropylene from the viewpoint of recycling or manufacturing cost. It is the premise of the present invention.

[0004]

As described above, if the leak angle is larger than the LB angle, no matter whether the inside of the bottle is in a negative pressure or a pressurized state, the outside air and the inside of the bottle are kept unchanged without changing the outer shape. A flow of air can be generated. In other words, in the case of carbonated drinks, the situation of carbon dioxide deprivation is caused, and in the case of non-carbonated drinks, the situation that the outside air enters the aseptic PET bottle becomes unsanitary is illegal. obtain. In order to eliminate such fraud, the LB angle needs to be as small as possible and close to the leak angle. If possible, it is desirable that leakage occurs after the bridge of the rock band is broken, as shown in equation (B). An object of the present invention is to provide a cap for a narrow mouth in which a fraudulent act is hard to be performed by making the LB angle smaller as described above.

[0005]

In order to achieve the above-mentioned object, the invention of claim 1 is a main closure part having a narrow mouth bottle having a bottle neck formed by a single thread and a corresponding thread on the inside. And at least two unsealing grooves circumferentially provided below the main closure portion, and a knob portion at one end that forms the starting point of the tearing operation at unsealing, and is sandwiched by the unsealing groove to form a strip shape. A formed tearing band, and a locking portion that is provided below the tearing band and is provided on the inner periphery below the bottle neck of the narrow-mouth bottle in a radial state and is engaged with a protrusion that is engaged in a closed state. It is characterized in that it is composed of a lower band partly connected by tearing bands by upper and lower succession parts so as to be scattered inward in at least two directions in a radial state and to be separated from the main closure part by tearing the tearing band. It is set to.

Further, the invention of claim 2 is characterized by comprising an extended knob portion formed by extending the knob portion to the top of the main stopper portion along the outer wall of the main stopper portion.

Further, the invention according to claim 3 is characterized in that it is provided with an extended knob portion formed by extending the knob portion to a lateral side of the outer wall of the main closure portion.

The invention according to claim 4 is characterized in that the extended knob portion is formed in a ring shape.

Further, according to the invention of claim 5, a main cap portion having a valley screw corresponding to a screw thread provided on the bottle neck of the narrow-mouthed bottle inside is provided, and the main cap portion is circumferentially provided below the main cap portion. At least one unsealing groove, and a locking portion that is provided below the unsealing groove and that is provided on the inner periphery of the narrow neck bottle in a radial state below the bottleneck and that engages in a closed state with a protruding portion In the cap scattered inward in at least two directions in a radial state, the locking portion is provided with a hollow portion that shrinks in the capping process, expands when the capping is completed, and does not deform when the cap is opened. There is.

Further, according to the invention of claim 6, there is provided a main cap portion internally provided with a valley screw corresponding to a screw thread provided on the bottle neck of the narrow mouth bottle, and circumferentially provided below the main cap portion. At least one unsealing groove, and a locking portion that is provided below the unsealing groove and that is provided on the inner periphery of the narrow neck bottle in a radial state below the bottleneck and that engages in a closed state with a protruding portion In the cap which is scattered inward in at least two directions in the inside, long grooves adjacent to each other in the circumferential direction and extending in the radial direction are provided adjacent to the locking portion.

[0011]

The present invention is configured as described above.
The operation according to the invention of claim 1 is as follows.
The initial premise is to have a narrow mouth bottle with a bottle neck formed of a single thread and a corresponding thread on the inside. This is because the thread pitch tends to be relatively gradual compared to multi-thread screws, and one of the reasons for selecting it is that it can be rotated relatively by the user's hand by keeping the thread pitch low like single thread screws. This is because it is possible to obtain a relatively large vertical force of the closure portion even if the force to be applied is weak. That is, the rotational force at the time of opening is converted into a force in the axial direction, which is useful for the operation at the time of opening.

Next, a tearing band formed in a band shape is provided below the main stopper portion, and a lower band having a protrusion engaging with the bottle on the inner periphery thereof is provided below the tearing band. The lower band and the lower band are connected by the upper and lower succession sections. With this configuration, tearing the tearing band causes the tearing band to first separate from the main closure portion, and then the lower band to be torn through the upper and lower succession portions. In this state, no cap residue is generated on the bottle side. As a result, it is possible to remove the residue below the cap, which is treated as an impurity during recycling on the bottle side.

In addition to the above, the function of the present invention is to provide an extension knob portion formed by extending the knob portion along the outer wall of the main stopper portion to the top of the main stopper portion. The shape and shape can be freely provided within the top of the main stopper.

According to the third aspect of the present invention, by providing the extension knob portion formed by extending the above-mentioned knob portion to the side of the outer wall of the main closure portion, the user can easily grasp the extended portion on the outer peripheral side. Become.

With the operation according to the fourth aspect, the extended knob portion formed by extending laterally to the outer wall of the main closure portion is formed in a ring shape and can be grasped without depending on the grip force of the user.

According to the fifth aspect of the present invention, the hollow portion is formed so that the engaging portion provided on the inner circumference of the lower band is contracted when the engaging portion is provided on the lower portion of the bottle skirt 22 during the closing process. It is provided. Since the outer shape of the locking portion of the hollow portion is substantially wedge-shaped, the hollow portion expands when the closure is completed and does not deform when the closure is opened.

According to the operation of claim 6, since a long groove which penetrates in the radial direction and is long in the circumferential direction is provided adjacent to the locking portion provided on the inner circumference of the lower band, the stress in the radial direction is reduced. On the other hand, the locking portion freely moves in the radial direction and also forms a restoring movement.

[0018]

1 shows an embodiment of a pill fur-proof plastic cap for a narrow mouth bottle according to the present invention, FIG. 1 (A) is a side partial sectional view, and FIG. 1 (B) is a partial sectional perspective view. Therefore, each component will be described below.

A main stopper 2 is provided with a seal for preventing gas permeation on the top surface of the inner side of the main stopper 2, and the material is made of a polymer compound such as polypropylene. A large number of stop lines are formed, and an inner screw 12 corresponding to the single screw 21 of the bottle is provided on the inner peripheral surface to form the main part of the cap. The tearing band 5, this member is located below the main closure part 2 and is sandwiched between the opening grooves 3 and 4 to form an annular band shape. The knob 6, which is provided at one end of the tearing band 5,
It is a grip portion used by the user when tearing the tearing band, and can take various forms as described later. The upper and lower succession portion 8 is a portion that connects the tearing band 5 and the lower band 7. The lower band 7, which has a protrusion on the inner surface so that the main stopper 2 does not rotate unless the tearing band 5 is opened, is moved along the neck of the narrow mouth bottle 24 after opening and used. The trace is clearly shown, but if it is desirable not to leave it due to hygiene problems, provide the upper and lower succession parts 8,
When tearing the tearing band, the lower band can be torn off together.

Now, the related details of each of the above components will be described later. A tearing band 5 is located below the main closure portion 2 via an opening groove 3, and a lower band 7 is provided below the tearing band 5 via an opening groove 4. The lower band 7 is partially connected to the tearing band 5 by the upper and lower succession portions 8. In the opening groove 4,
The bridges 11 are provided in a scattered manner, and their binding force (connecting force) is determined by the number of the bridges, the cross-sectional area of each bridge, the length, and the material and shape thereof. The following points are noted in this embodiment.

A: When the tearing band is rotated further in the opening direction without tearing at the time of opening,
The connecting force of the bridge is designed so that at least one of the bridge connecting the main stopper and the tearing band or the bridge connecting the tearing band and the lower band is cut before the locking part gets over the protrusion. Adjust in stages.

B ... As a result, the pill fur-proof plastic cap for a narrow mouth bottle of the present invention is unlocked by tearing the tearing band and can be easily opened. Also, even if the user mistakenly thinks it is the same as opening a normal PET bottle and strongly turns it in the opening direction, the bridge that connects the main closure part and the tearing band and the lower part of the tearing band are connected. Since the bridge is configured so that at least one of the bridges connecting to the band is broken, the lock band is opened in a leaked state after the bridge is broken at the time of opening. The reason for many of these reasons is that the bridge cutting is conventionally an extension force in the direction along the axial direction of the cap. The point where it cuts is greatly different due to the force in the circumferential direction.

By the way, in order to obtain the above-mentioned action, it is necessary to set the relationship not only on the cap side but also on the bottle side to a specific condition. That is, on the narrow mouth bottle side, the reason why commonality with ordinary PET bottles is sought and cost is improved, and the convenience of the user at the time of opening (especially how many rotations will complete the opening ), It is desirable to use a single thread screw. Also in this embodiment, the single thread screw is used. Also, the screw part
A skirt 22 is provided below the ridge 21, and immediately below the skirt 22 are provided protrusions 23 that are evenly divided at right angles and provided in a radial pattern.

When the cap is closed with respect to the narrow-mouth bottle having the above-mentioned structure, the engagement state of both is as follows. First, at the time of capping, when the internal thread 12 on the cap side is engaged with the one-thread screw 21 of the narrow-mouth bottle 24 to rotate, the pitch is naturally smaller than that of the multiple-thread screw. As a result, as the process of closing the cap, the protrusion provided on the narrow-mouth bottle 24.
23 and the locking portion 13 on the cap side come into contact with each other relatively slowly in the moving speed in the axial direction. Further, as shown in FIGS. 4 and 9, the interval θ between the protrusions 23 is set to be smaller than the gap angle θ ′ formed between the protrusions. By doing so, even if the vertical movement distance of the single-thread screw with respect to an arbitrary angle is slow, the distance between the protrusion and the protrusion is sufficient,
It becomes possible for the locking portion 13 on the cap side to be housed in the gap between the protrusions in the process of ending the closure.

Further, when the stopper is closed, the side where the engaging portion and the projection collide is formed thin and low, and the opposite side is thickened or thickened. Details of this shape will be described with reference to FIG. FIG. 5 (A) shows an example in which the thickness in the radial direction is changed. The angle β on the leading side when the plug is closed is sufficiently smaller than the angle β ′ on the rear side, and β ′ is almost a right angle. desirable. FIG. 5B shows an example in which the width in the axial direction is changed, and the width γ on the front side when the plug is closed is the width γ ′ on the rear side.
It is desirable that it is sufficiently smaller. FIG. 5C shows an example in which both of the above are combined. Further, this (C) is the locking portion 13 in the case illustrated in FIGS.

FIG. 3 is a partial cross-sectional perspective view showing the details of the periphery of the engaging portion 13 with the viewpoint on the inner diameter side. In the figure, from the top, the main plug portion 2, the tearing band 5, and the lower band 7 are shown. , And the upper and lower succession unit 8 is shown at the right end. Reference numeral 10 is an opening groove used to form the upper and lower succession portions 8. In addition, the knob 6 is a tearing band 5
It forms the starting point of the tearing action when opening.

6 to 8 show an embodiment in which another form of the knob 6 is shown. In FIG. 6, a recess 6D is provided from the top to the side of the main closure part 2, and the knob 6 is inscribed in the recess.
Has been extended. With this structure, the tearing band 5 can be torn by being pulled up by the nail of the user's finger with respect to the end 6C of the knob 6 at the top and being pulled down from the end 6C. FIG. 7 is a slightly simplified embodiment of FIG. 6, in which a recess 6D ′ is provided only on the side of the main stopper 2 and the knob 6 is provided along the center of the recess 6D ′ at the upper end of the main stopper 2. It is extended to the vicinity. With this configuration, the tearing band can be torn by hooking the end 6C ′ of the extended knob 6A and pinching it downward.
FIG. 8 shows an embodiment in which the knob 6 is simply enlarged in a circular shape so that any user can easily tear the tearing band.

FIG. 9 shows an embodiment in which the locking portion 13 is improved, and FIG. 9 (A) shows the improvement of the locking portion at the same sectional position as in FIG. The part shows the completed shape, and the left locking part shows the state just before the completion. 9B to 9D are partial cross-sectional views for explaining the process up to the completion of the locking portion of FIG. 9A, and FIG. 9E is a partially enlarged cross-sectional view showing another improved embodiment. It is a figure.

First, the improved locking portion 13A shown in FIGS. 9A to 9D will be described. Although the position and the overall shape of the locking portion are the same as those shown in FIG. 3, it is characterized in that the middle abdominal portion is hollow and has a shape that is crushed sideways by a predetermined force. Also, as a means to make such a shape,
To give an example, first, in the mass production, it is formed in a state of being further hung from the lower band 7 as shown in FIG. The characteristic of this shape is that the whole is in the shape of a triangle, the front end side is thin and the rear end side is thick when closed, and the rear end side is provided with a triangular piece B3 separated by a weakening line B1. . Further, a weakening line B2 is provided so that the whole of them can be bent along the lower side of the lower band 7. One of the features of the above-mentioned shape is that it is a shape that is easy for die cutting. Now, (C) shows the middle of forming the locking part by bending it along the weakening lines B1 and B2. By bending it sufficiently, the state of (D), that is, the locking on the right side of (A) of FIG. 9 is shown. It has the same shape as the portion 13A.

Now, for the same purpose as that of the above-mentioned locking portion, the crushing operation is more reliable, and the projection 23 and the locking portion 13B provided on the narrow-mouth bottle 24 at the time of opening the stopper. It is an embodiment for the purpose of hitting both members so that they are locked together. This (E) is a drawing showing a cross section in the radial direction, and its shape is connected to the outer periphery at both end positions E1 and E2, and the whole is W-shaped. The intermediate position is not connected only by touching the outer circumference, but one side is restricted by the small protrusion E3. A slight depression is provided on the other side. The two spaces formed in the W shape are provided so that the entire locking portion 13B can be crushed well. Now, such a locking part 13
In B, during the plugging process, the protrusion 23 hits from the right side in the figure and collapses from the triangular space on the right side. In this state, the center position of the W shape moves further to the left and enters the recess, Is crushed, and both peaks are
The 23 can pass without much resistance. On the other hand, when the protrusion 23 hits from the opposite direction when opening, that is, when it is pressed from the left side, the movement at the center at the time of W is hindered by the small protrusion E3, and the wall surface on the E2 side is at a right angle. Since it is upright, the protrusion 23 is completely prevented from moving to the right.

The embodiment configured as described above is further used under the following conditions. The lower band 7 and the bottle skirt 22, when the locking portions 13A and 13B are rotated when the stopper is closed, and when the skirt 22 of the narrow-mouthed bottle 24 and the protruding portion 23 are passed over,
It is crushed between itself and the protrusion 23 to change its shape, and the shape change is restored after it has been overcome, and during the rotation operation at the time of opening the cap, the protrusion 23 of the bottle and the locking portion 13
When the main closure part 2 is rotated and opened to prevent the locking part 23 from being crushed when it hits A and 13B, one side that contacts the protrusion of the locking part first is rotated. It has a wedge shape with a large size and a small size on the other end side,
The maximum load required to rotate and close the cap does not exceed the maximum uncut load of both bridges connecting the main cap 2, the tearing band 5 and the lower band 7. Further, the locking portions 13A, 13A of the lower band 7 are further rotated when the stopper is rotated and when the projection 23 of the bottle is overcome.
B is crushed between the lower band 7 and the projecting portion 23 of the bottle to change its shape, and after passing over the shape, the shape change is restored. Further, when the main cap 2 is rotated in the cap opening direction when the cap is opened, the maximum load that the locking parts 13A and 13B hit the skirt 22 and the projection 23 to overcome is
One or both of the bridge 11 that connects the main plug 2 and the tearing band 5 and the bridge 11 that connects the tearing band 5 and the lower band 7 are cut so that the strength of each bridge 11 is not exceeded. I have decided.

The structure and method of use of one embodiment of the present invention have been described above. However, as for each component, other embodiments shown below can be obtained as required. As described above, the present invention is a cap that is opened after removing the tearing band. Then, it is described in the above embodiment that it is possible to forcibly cut the bridge without removing the tearing band by adding the above conditions. By the way, even if such operation is the same, by changing the way of saying, it is a cap that forcibly cuts the bridge with a certain amount of force when opening and opens it, and only if the design is poor or the tearing band is insufficient It can be considered as a proposal for a new genre cap that can be pulled and opened.

FIG. 11A shows the locking portion 13 provided in FIG.
Instead of the hollow portion E4 provided in A, the wedge-shaped locking portion 13B has been changed. Further, a long groove 16 that penetrates in the radial direction and is long in the circumferential direction is provided above the engaging portion 13B, that is, immediately above the cap head side in the axial direction of the cap. In addition, at the central position of the long groove 16, almost the above-mentioned locking portion is formed.
The top 17 of 13B is located. Due to the above, the locking portion 1
3B is provided on a strip-shaped member formed by both edges formed by the long groove 16 and the lower end of the lower band 7, and the strip-shaped member acts like a leaf spring. As a result, even if the cap body is made of hard resin, the locking portion 13B can be largely displaced in the radial direction. That is, when the cap is entirely attached to the bottle, it is possible to comfortably ride over the projections 23 radially provided below the skirt 22 of the bottle when the cap is closed. In other words, the possibility that a defective product will be produced by cutting when the opening groove 3 or 4 provided below the main plugging portion 2 is closed is reduced.

FIG. 11B is a sectional view taken along line XX of FIG.
The dotted line in the figure shows how the protrusion 13B is displaced when it receives stress. Note that FIG.
In this embodiment, the long groove 16A is formed by obliquely rising from the lower end of the lower band 7, and the protrusion 13C has the same shape as the triangular shape formed by the long groove 16A and the lower end of the lower band 7. I am trying. In this modified embodiment, FIG.
The protrusion 13B shown in the above embodiment is open at the top and bottom and both left and right sides are connected to the lower band 7, but the protrusion 13C shown in FIG. 12 is in a state where only one side is connected to the lower band. ing. Therefore, the structure shown in FIG. 12 is a structure that can be displaced in the radial direction to a greater extent than the structure shown in FIG.

[0035]

As described above, the present invention uses a tearing band in order to dramatically improve the LB angle (Leak and break angle) characteristic, which has recently attracted attention as an index for preventing unauthorized opening in a plastic cap. Both the opening means and the opening means for cutting the bridge that locks the plug in the rotating direction by opening the main closure part strongly enough can be used. Alternatively, a damper-evidence-type cap that is easy to obtain the LB angle characteristic is obtained for a narrow-mouthed bottle. As a means for that purpose, it is a pawl that the projection provided below the cap body for overcoming and locking the projection provided below the skirt of the bottle has a shape that is easily moved in the radial direction.

Therefore, the effect of the invention of claim 1 is as follows.
Since the tearing band and the lower band are connected by the upper and lower succession parts, no residue of the cap is generated on the bottle side after use. As a result, the residue under the cap, which is treated as an impurity at the time of recycling on the bottle side, does not remain, and the recycling process can be facilitated.

The effect according to claim 2 is that, in addition to the above effect, an extension knob portion is formed by extending the knob portion along the outer wall of the main stopper portion to the top of the main stopper portion. The size and shape of can be freely set within the top of the main plugging portion, and can be made larger. As a result, for example, even when the entire cap is made of a hard resin, the user can reduce the burden of the process of pinching the knob and further opening the cap.

The effect according to claim 3 is that by providing the extension knob portion formed by extending the above-mentioned knob portion to the side of the outer wall of the main closure portion, the knob is easily pinched on the outer peripheral side, Similarly, the burden on the user is reduced.

The effect according to claim 4 is that the extension knob portion formed by extending to the side of the outer wall of the main closure portion is formed in a ring shape and can be grasped without depending on the grip force of the user.

The effect according to claim 5 is that the hollow portion is formed so as to be contracted when the engaging portion provided on the inner circumference of the lower band comes into contact with the protruding portion provided under the skirt 22 of the bottle during the closing process. It is provided. Since the outer shape of the locking portion of the hollow portion is substantially wedge-shaped, the hollow portion expands when the closure is completed and does not deform when the closure is opened. As a result, even if the entire cap is made of a hard material, the capping work can be performed without breaking the opening groove provided below the main capping portion 2 due to the above-mentioned deformation, and at the time of opening, the cap is closed by the lower band. Since a large stress is obtained from the protruding portion on the bottle side, the opening groove is cut to open the bottle.

The effect of claim 6 is that by providing a long groove adjacent to the locking portion provided on the inner circumference of the lower band in the circumferential direction and extending in the radial direction, the long groove is provided against the stress in the radial direction. As a result, the locking portion freely moves in the radial direction and forms a restoring motion. As a result, the opening groove provided below the main stopper 2 can be closed without breaking, and a large stress is obtained from the bottle-side protrusion on the lower band at the time of opening. The opening groove is cut and the opening is performed.

[0042]

[Brief description of drawings]

FIG. 1 shows one embodiment of the present invention, (A) is a partial sectional side view, and (B) is a partial sectional perspective view.

FIG. 2 is an explanatory view showing a state in which the cap of the same embodiment shown in FIG. 1 is attached to a corresponding narrow mouth bottle.

3 is a partially enlarged cross-sectional perspective view of the embodiment shown in FIG.

FIG. 4 is an explanatory view showing the relationship between the cap and the bottle of the embodiment shown in FIG.

FIG. 5 is a partially enlarged perspective view showing the type and principle of the locking portion.

FIG. 6 is a perspective view showing one form of an extension knob portion extended from the tearing band.

FIG. 7 is a perspective view showing another form of the extension knob portion extended from the tearing band.

FIG. 8 is a perspective view showing a form in which an extension knob portion extended from the tearing band has a ring shape.

9A is an explanatory perspective view showing a locking portion of another form, FIGS. 9B to 9D are exploded perspective views of the locking portion of FIG. 9A, and FIG. It is a fragmentary sectional perspective view which shows the modification of (A).

FIG. 10 is an explanatory view showing the relationship between the locking portion and the bottle shown in FIG.

11A is a partial cross-sectional perspective view showing a modified example of the related art of the locking portion shown in FIG. 9, and FIG.
It can be a partial cross-sectional perspective view based on the -X cross-sectional view.

FIG. 12 is a partial cross-sectional perspective view showing a further modified example of the locking portion shown in FIG. 11.

FIG. 13 is a partial cross-sectional view showing a conventional technique.

[Explanation of reference numerals] 21 in FIG. 1 ... bottleneck 24 ... narrow bottle 12 ... screw thread 2 ... main closure part 4 ... opening groove 3 ... opening groove 6 ... picking part 5 ... tearing band 21 ... bottleneck 23 ... protrusion 13 … Locking part 7… Lower band 11… Bridge 6A… Extension knob part θ… Angle θ '… Gap angle

Claims (6)

[Claims] 1. A bottleneck (21) formed from a single thread
With a narrow mouth bottle (24) having a thread (12) corresponding to the inside, and at least two unsealings provided circumferentially below the main stopper (2) A tearing band (5) formed in a band shape having grooves (3, 4) and a knob (6) at one end that forms the starting point of the tearing action at the time of opening. And the tearing band (5)
The bottle neck of the narrow mouth bottle (24) is provided below the
The tearing band is provided by interlocking locking portions (13), which are provided below the (21) in a radial state and are engaged with the protrusions (23) in a closed state, in a radial state in at least two directions. Pill for narrow mouth bottle consisting of lower band (7) partly connected by tearing band (5) by upper and lower succession part (8) so as to separate from main closure part (2) by tearing (5) Fur-proof plastic cap. 2. An extension knob portion (6A) formed by extending the knob portion (6) along the outer wall of the main stopper portion (2) to the top of the main stopper portion (2). The pill fur-proof plastic cap for a narrow mouth bottle according to claim 1. 3. The narrow mouth bottle according to claim 1, further comprising an extension knob portion (6B) formed by extending the knob portion (6) to the outer wall side of the main closure portion (2). Pill fur proof plastic cap for. 4. The pill fur-proof plastic cap for a narrow mouth bottle according to claim 4, wherein the extension knob portion (6B) is formed in a ring shape. 5. A main closure part internally provided with a thread (12) corresponding to a thread provided on a bottle neck (21) of a narrow mouth bottle (24).
(2), at least one unsealing groove (4) provided circumferentially below the main closure part (2), and a narrow mouth bottle provided inside the unsealing groove (4) and inside. At least two inner sides of substantially wedge-shaped locking portions (13) that engage with projections (23) provided in a radial state below the bottleneck (21) of (24) in a closed state In the cap scattered in a radial state on the
A pill fur-proof plastic cap for a narrow mouth bottle, wherein (13) is reduced in the capping process, expanded when the capping is completed, and provided with a non-deformable hollow portion when the cap is opened. 6. A main closure part internally provided with a thread (12) corresponding to a thread provided on a bottle neck (21) of a narrow mouth bottle (24).
(2), at least one unsealing groove (4) provided circumferentially below the main closure part (2), and a narrow mouth bottle provided inside the unsealing groove (4) and inside. A locking portion (13) that engages in a closed state with a protruding portion (23) provided in a radial state below the bottleneck (21) of (24) is in a radial state in at least two directions. A pill fur-proof plastic cap for a narrow mouth bottle, characterized in that, in the scattered caps, a long groove (16) penetrating in the radial direction above the engaging portion (13) and long in the circumferential direction is provided adjacently. .