JP6695698B2 - cap - Google Patents

Description

  The present invention relates to a cap that fits into an opening of a packaging container and seals the inside.

  Although there are various forms of packaging containers, when the content is a liquid, it is often a tubular shape. Such a container is generally called a bottle, and a cylindrical neck portion is formed on the upper portion thereof, and the inside can be sealed by incorporating a cap at the tip of the neck portion. There are various forms of this cap as well, but in general, a screw or the like is formed so that the inside can be repeatedly sealed, and the cap has a detachable structure. However, regarding a container in which drinking water, a drug solution, and the like are enclosed, there is a mode in which a cap having a fitting structure is used and the cap is not removed until the contents are exhausted in consideration of hygiene.

  FIG. 7 shows an example of the shape of the cap having the fitting structure. The bottle depicted in this figure is used to supply drinking water to the water server, is formed of a thin soft resin, and is assembled in the water server in an upside down state. After installation, the bellows are crushed at atmospheric pressure as the drinking water is consumed, and when the drinking water is exhausted, the use as a bottle is finished, so it is excellent in hygiene. Then, a cap, which is a connecting portion with the water server, is fitted into the neck portion of the bottle, and the cap is irremovably integrated with the bottle due to the ridge formed on the outer peripheral surface of the neck portion. The cap is composed of a top plate that closes the end surface of the neck of the bottle, a side peripheral wall that surrounds the neck, and the like.

  Usually, the bottle and the cap have different required properties, and therefore different materials are often used. In order to realize resource recycling, the cap and the cap may be removable from the bottle prior to disposal. The cap shown in FIG. 7 also has a removable structure, and a puller, a slit, and a weak line are formed on the side peripheral wall thereof, and the back of the slit is the starting point of the weak line. And when actually removing the cap, first insert your fingers etc. into the back of the puller, then pull out the puller to tear the weak line gradually, and finally the side peripheral wall of the cap is divided into upper and lower. The constraint by the ridge is released, and the cap can be easily removed.

  As an example of the technology related to the invention of the present application, there are the following patent documents. Patent Document 1 among them discloses a recycling cap to be fitted into a glass bottle or a PET bottle, and is characterized in that the cap can be removed at the time of disposal without using a tool, and the shape is the same as that of a conventional product. To do. In order to realize these characteristics, this recycling cap has a tubular portion that surrounds a mouth portion such as a glass bottle, and the inner wall of the tubular portion has a convex portion that prevents the mouth portion from coming off. In addition, the cylindrical part is cut in two rows that extend almost vertically, and by pushing up the inside (the inner part) between the two rows of cutting, the restraint by the convex part is released, and the cap is removed. Can be removed. The height of the convex portion is suppressed in the section adjacent to the cutting process, and the cap can be removed without using a tool or the like.

  Patent Document 2 discloses a bottle for a water server provided with a suspender. A bottle for a water server may have an internal capacity of more than 10 liters, and since the work of assembling the bottle into the water server is performed manually, some kind of suspending device is required for the bottle. In Patent Document 2, a strip-shaped adhesive tape is used as the hanging tool, and both ends thereof are attached to the side surface of the bottle body. By using the adhesive tape as described above, the shape of the bottle main body is simplified, and it is not necessary to manufacture a special hanging tool, so that the cost can be reduced. In this document, it is drawn that a cap is fitted on the neck portion of the bottle body. Since this cap functions as a connection part with the water server, it does not come off from the bottle body during use.

JP, 2000-72166, A JP, 2012-46216, A

  As shown in FIG. 7, a structure in which a puller, a slit, and a weak line are formed on the cap in order to realize the removal of the cap has been widely used. This slit (in FIG. 7, a shape like “L” inverted upside down and connected to the weakened line at the upper right) reaches the lower end surface of the cap in consideration of the ease of pinching the puller. Is preferred. However, because the slit reaches the lower end surface of the cap, when the cap is fitted into the bottle, the slit enters the neck of the bottle as shown in the lower right of FIG. 7, and the cap floats in an inclined posture. There is. When such a situation occurs in a production line using an automatic filling device, there is a possibility that the subsequent steps will be greatly damaged.

  In order to avoid the situation illustrated in the lower right of FIG. 7, a cutout may be formed as an alternative to the slit, as shown in FIG. Since the cutout does not reach the lower end surface of the cap, it does not cause a situation like a slit. However, when manufacturing a cap using a mold, it is difficult to bring the cutout close to the lower end surface of the cap in consideration of the fluidity of the molten resin, and when pulling the puller, a large force is inevitable, Operability deteriorates. If the cutout is brought close to the lower end surface of the cap, there is a risk that the molten resin may flow poorly during manufacturing and the cutout may reach the lower end surface of the cap.

  The present invention was developed based on these circumstances, and aims to provide a cap that can prevent problems when fitting into a bottle on a manufacturing line, can be manufactured reasonably, and can be easily removed from the bottle. ..

The invention according to claim 1 for solving the above-mentioned problems is a cap fitted into a neck portion of a bottle, and a top plate that closes an end surface of the neck portion, a side peripheral wall surrounding the neck portion, and the bottle integrated with the bottle. and restraining means for, consist, on the side wall, in order to cancel the function of the restraining means, and pull, the line of weakness extending from the base of the hand-out the cited, the provided, the pullers, the Arranged in the middle of the restraint means and the lower end surface of the side peripheral wall , the weak line is composed of an annular line, a transverse line, a descending line and an ascending line, the annular line is arranged above the restraining means, and It extends so as to make a complete circle along the circumferential direction of the side peripheral wall, and the transverse line consists of two rows starting from the upper and lower portions of the base of the puller, both in the circumferential direction of the side peripheral wall. It extends, the descending line is arranged below the pull tab and extends obliquely toward the lower end surface of the side peripheral wall, and the ascending line is located above the pull tab and A portion extending obliquely toward the annular line, the transverse line located at the lower portion of the puller is connected at an intersection with the descending line, and the transverse line located at the upper portion of the puller. The cap is characterized in that an intersection window penetrating through the front and back surfaces of the side peripheral wall is provided at both or one of the two locations where the connection is made at an intersection with the ascending line .

  The cap according to the present invention has a structure in which it is integrated with the bottle until it is disposed after it is fitted into the neck of the bottle, and is not a structure that can be detached with screws or the like. However, in order to realize resource recycling, it has a function that can be removed from the bottle with a simple operation prior to disposal. The caps and bottles are not limited in use and can be used in various fields. The cap is premised to be a molded product of resin.

  As described above, the bottle to be paired with the cap is not limited in use and shape, but it is assumed that it has a cylindrical neck portion and its end surface is open. The cap is composed of a disk-shaped top plate that closes the end surface of the neck portion, a side peripheral wall extending so as to hang down from the outer edge portion of the top plate, and a restraining means for integrating with the bottle. The side peripheral wall has a cylindrical shape surrounding the outer peripheral surface of the neck portion of the bottle and prevents the cap from falling off. It should be noted that the postures of the bottle and the cap are arbitrary, but in the present application, it is premised that the neck portion projects upward and the cap is fitted so as to close the upper end portion thereof.

  The restraint means plays a role of integrating the bottle and the cap, and its specific form is arbitrary, but usually, some concavo-convex is provided on the boundary surface of both and the fitting is used. The irregularities are often provided in an annular shape along the boundary surface. In addition, instead of unevenness, convex projections may be provided on both sides and the contact may be used. In addition, when the cap is fitted into the bottle, the cap has a certain degree of flexibility so that the side peripheral wall of the cap can ride over the protruding portion.

  The pull tab is a portion that becomes a starting point when the cap is removed from the bottle, and is formed by cutting out a part of the side peripheral wall. When the side wall is provided with a cutout having a "U" shape, a "U" shape, or the like, the region inside thereof is less constrained by the surroundings and can be easily deformed. Such a region that is easily deformed serves as a puller, and the side peripheral wall can be sequentially torn by pulling the puller outward. The pull tab is formed in the middle portion of the side peripheral wall and is not exposed on the lower end surface of the cap. The shape of the puller is flexible, but the cutout surrounding the puller should be large enough to allow the insertion of fingers.

  The line of weakness is formed by locally thinning the side peripheral wall and connecting them in a linear shape. By actually tearing the line of weakness, the side peripheral wall separates from the neck portion of the bottle and the cap can be removed. The line of weakness is therefore connected to the end of the cutout surrounding the puller so that the line of weakness is naturally torn when the puller is pulled outwards. The weakened line is formed on either the inner peripheral surface side or the outer peripheral surface side of the side peripheral wall. If it is formed on the inner peripheral surface side, the line of weakness cannot be visually recognized from the outside, and the appearance is excellent.

  The fragile wire in the present invention is composed of a total of four types, that is, an annular wire, a transverse wire, an ascending wire, and a descending wire, and the annular wire plays a role of separating the side peripheral wall from the top plate. Therefore, the loop line extends in the circumferential direction of the side peripheral wall, but it is provided above the pull tab (closer to the top plate) in order to avoid crossing the pull tab. Further, it is provided above the restraint means (on the side close to the top plate) so that the restraint means can be detached from the neck portion. In addition, in order to avoid that the cap is completely divided, the annular wire may not be formed into a perfect annular shape.

  The transverse line is a weak line extending from the base of the puller (the end of the cutout) to the circumferential direction of the side peripheral wall. The puller according to the invention shall be pulled out in a generally horizontal direction. Therefore, there are two rows of transverse lines, one starting from the upper end of the base of the pull and the other starting from the lower end. Then, when the puller is actually pulled out, the load concentrates on the base of the puller, and the transverse lines in two rows are torn eventually.

  The ascending line is a weak line extending from the upper transverse line to the annular line, and goes diagonally upward on the side peripheral wall. Although there is a restraint means between the puller and the loop line, the restraint means is not provided around the ascending line in order to avoid the intersection of both. Further, the descending line is a weak line extending from the lower traversing line toward the lower end surface of the side peripheral wall, and extends obliquely downward along the side peripheral wall. By arranging a series of weak lines in this way, the side peripheral wall can be divided into upper and lower parts with the annular line as a boundary, the function of the restraining means can be released, and the cap can be removed from the bottle.

  The intersection window is a cutout provided at a position where the transverse line connects with the ascending line or the descending line. Since the portion where the transverse line connects with the ascending line or the descending line inevitably has an intersection angle, the load conditions at the time of tearing also differ, and when moving the puller, a larger force is required than in other sections. Therefore, in addition to giving a sense of discomfort during the movement, there is a possibility that the movement of the puller cannot be continued if the grip strength and the like cannot be sufficiently exerted. However, by providing the intersection window at this position, it is not necessary to locally apply a large force when moving the puller.

  The intersection window may be formed by digging down the inner surface of the line of weakness, or may be formed by cutting out not only the line of weakness but also the area including the outside thereof. In addition, when forming the back surface of the weakened line by digging down, since the two weakened lines in different directions are connected, the intersection window may have a bent shape such as a V shape or an arc shape. Many. The intersection window may be provided on both the upper and lower traverse lines, or may be provided on only one of them. By providing the intersection window, when the puller is moved, the reaction force is temporarily reduced and the movement of the puller is given momentum, so that the ascending line and the descending line in the rear can be smoothly torn.

  According to the present invention, since the puller is provided at the intermediate portion of the side peripheral wall, the lower end surface of the cap has a perfect annular shape with no slits or the like, and it is possible to prevent problems when the cap is fitted into the bottle. In addition, since the upper and lower two weak lines (transverse lines) are formed from the base of the puller, it is not necessary to bring the puller close to the lower end surface of the cap, and it is possible to prevent defective flow of the molten resin during molding. Further, by providing the intersection point window, when moving the pull tab, there is no section that locally requires a large force, and the cap can be easily removed.

  According to the invention as set forth in claim 1, in addition to providing a puller at an intermediate portion of the side peripheral wall of the cap, the weak line is constituted by a transverse line, an annular line, a descending line and an ascending line, and the descending line or the ascending line is transverse. By providing an intersection window at the location where the line is connected, the puller can be moved without difficulty and the weak line can be smoothly torn. If the intersection window is not provided, the line of weakness is bent in the middle, and the reaction force at the time of tearing locally increases. However, in the present invention, the intersection window eliminates such an increase in reaction force. Therefore, if the puller is pinched and then moved in the circumferential direction, the weak lines are sequentially torn without receiving a large reaction force, and the cap can be easily removed.

  Further, since the lower end surface of the cap has an uninterrupted annular shape, the cap can be fitted securely, and a problem such as stopping the manufacturing line is not caused. In addition, by providing a descending line, a sufficient distance can be secured from the lower end surface of the cap to the cutout (surrounding the pull tab). Therefore, during the production of the cap, the molten resin circulates in its entirety without causing a flow failure, and the yield and quality are excellent.

FIG. 3 is a perspective view showing a shape example of a cap according to the present invention and a bottle into which the cap is fitted, and a vertical cross section of the cap alone is drawn in the upper right of the figure. It is a top view, a front view, and a longitudinal cross-section (AA cross section) of the cap of FIG. It is a perspective view which shows the state which fitted the cap of FIG. 1 in the neck part of a bottle, and the state which pulled out a puller slightly after that. FIG. 4 is a perspective view showing a state immediately after removing the cap after FIG. 3. It is a perspective view which shows the example of arrangement | positioning of an intersection window. It is a perspective view which shows the example of a shape of an intersection window. FIG. 3 is a perspective view showing an example of the shape of a cap having a fitting structure that has been widely used in the past, in which a slit is formed adjacent to a pull tab. FIG. 8 is a perspective view showing an example of the shape of a cap having a fitting structure that has been widely used in the past, which is an improved type of FIG.

  FIG. 1 shows an example of the shape of a cap according to the present invention and a bottle 51 into which the cap is fitted, and a vertical cross section of the cap alone is drawn in the upper right of the figure. The bottle 51 is for enclosing various liquids, is made of soft resin, and is supposed to be crushed by atmospheric pressure or external force. Therefore, a plurality of bellows 53 are formed on the side surface of the bottle 51. Further, a cylindrical neck portion 52 is formed on the upper portion of the bottle 51, and a cap is fitted to close the upper end surface thereof.

  The cap is composed of a top plate 17 that covers the upper end surface of the neck portion 52 and a side peripheral wall 13 that surrounds the outer periphery of the neck portion 52. At the center of the top plate 17, a spout 18 that serves as an outlet for the contents of the bottle 51 is provided. It is provided. Further, a hanging wall 19 is formed on the outer circumference of the spout 18 in order to ensure hermeticity with the neck portion 52 of the bottle 51. The hanging wall 19 has an uninterrupted annular shape, extends right below the top plate 17, and is in close contact with the inner peripheral surface of the neck portion 52.

  On the outer peripheral surface of the side peripheral wall 13, a pull tab 11, a cutout 12 and intersection windows 22 and 32 are formed. The cutout 12 is a portion where a part of the side peripheral wall 13 is literally cut out, and the inside of the cutout 12 is easily deformed due to the restraint from the surroundings, and functions as the puller 11. The cutout 12 has a shape in which “U” is laid down sideways, but its upper end extends long in the circumferential direction of the side peripheral wall 13. On the other hand, the lower end portion of the cutout 12 has a reduced circumferential length. Therefore, the upper end portion and the lower end portion of the cutout 12 are not aligned on the same vertical line, and a discrepancy occurs. The upper end and the lower end of the cutout 12 serve as the base of the pull tab 11.

  The pull tab 11 is a starting point when the cap is divided, and is pulled out by a finger or the like. Since the pull tab 11 in FIG. 1 is located inside the cutout 12, the pull tab 11 inevitably has a shape in which the "U" is laid down, and its tip is semicircular. Also, in consideration of pulling out the pull tab 11 to the outside, the cutout 12 is enlarged near the tip of the pull tab 11 so that a finger or the like can be easily inserted. In addition, intersection windows 22 and 32 are provided at positions slightly away from the base of the pull tab 11. The lower intersection window 22 faces downward as the distance from the cutout 12 increases, while the upper intersection window 32 faces upward.

  As illustrated in the vertical cross section in the upper right of FIG. 1, a stopper 45 and a weakened line are formed on the inner peripheral surface of the side peripheral wall 13. The stopper 45 is a portion where the inner peripheral surface of the side peripheral wall 13 is locally protruded, extends in the circumferential direction, and functions as a restraint unit that integrates the bottle 51 and the cap. The weak line is a narrow groove formed on the inner peripheral surface of the side peripheral wall 13 and extends linearly. The weak line in the present invention is two transverse lines 21, 31 extending from the end of the cutout 12. An annular line 34 extending in the circumferential direction of the side peripheral wall 13 between the stopper 45 and the top plate 17, a descending line 23 extending from the lower intersection window 22 to the lower end surface of the side peripheral wall 13, and an upper intersection window 32. It is composed of an ascending line 33 heading for an annular line 34. In addition, in FIG. 1, all the fragile lines are formed on the inner peripheral surface side of the side peripheral wall 13 in order to improve the aesthetic appearance, but on the outer peripheral surface side of the side peripheral wall 13 in order to easily recognize the existence of the fragile lines. Sometimes formed.

  Starting from the lower end of the cutout 12, a transverse line 21, an intersection window 22, and a descending line 23 are arranged in order. Therefore, when the pull tab 11 is pulled out to the outside, the transverse line 21 is gradually torn, and the cutout 12 and the intersection window 22 are eventually connected. At that moment, the reaction force acting on the pull tab 11 temporarily weakens, the moving speed of the pull tab 11 increases, and the next descending line 23 can be torn vigorously, and the side peripheral wall 13 below the pull tab 11 at once. Will be divided. It should be noted that the distance from the intersection window 22 to the lower end surface of the side peripheral wall 13 is ensured so as not to interfere with manufacturing. However, since the descending line 23 connects the intersection window 22 to the lower end surface without interruption, the tearing proceeds smoothly.

  On the other hand, above the pull tab 11, starting from the upper end of the cutout 12, the transverse line 31, the intersection window 32, and the ascending line 33 are arranged in order, and the ascending line 33 reaches the annular line 34. Therefore, when the pull tab 11 is pulled out, the transverse line 31 is gradually torn, and the cutout 12 and the intersection window 32 are connected to each other. At that moment, the reaction force acting on the pull tab 11 is temporarily weakened, the moving speed of the pull tab 11 is increased, and the next ascending line 33 can be vigorously torn, and finally the annular line 34 can be torn.

  A stopper 45 exists between the annular wire 34 and the pull tab 11, and the ascending wire 33 extends so as to cross the stopper 45. Therefore, the stopper 45 is interrupted only in the section intersecting with the ascending line 33, and is not a perfect annular shape. Further, the annular wire 34 is not a perfect annular shape in consideration of avoiding complete division of the cap and connection with the ascending wire 33. When almost the entire area of the annular wire 34 is torn, the side peripheral wall 13 below this can be detached from the neck portion 52 of the bottle 51, the function of the stopper 45 is lost, and the cap can be removed without difficulty.

  FIG. 2 is a plan view, a front view, and a vertical cross section (AA cross section) of the cap of FIG. As shown in the plan view and the front view, the cap has a cylindrical shape, the top plate 17 that closes the upper surface thereof is circular, and a spout 18 is provided at the center of the top plate 17. The spout 18 has a cylindrical shape extending downward from the top plate 17, and the inner plug 59 is press-fit into the spout 18 to seal the inside. Further, as a restraint means for integrating the bottle 51 and the cap, a stopper 45 is provided on the inner peripheral surface of the cap, and a ridge 55 is provided on the outer peripheral surface of the neck portion 52 of the bottle 51. Both the stopper 45 and the ridge 55 project from the inner peripheral surface and the outer peripheral surface and extend in the circumferential direction. By pushing the stopper 45 under the ridge 55, the cap is integrated with the bottle 51. In addition, a hanging wall 19 projects from the lower surface of the top plate 17. The hanging wall 19 contacts the inner peripheral surface of the neck portion 52 to ensure hermeticity.

  The pull tab 11 has a shape that "U" is laid down sideways, extends in the circumferential direction of the side peripheral wall 13, and has a semicircular tip end. The cutout 12 surrounding the pull tab 11 has a wide gap near the tip of the pull tab 11 so that a finger or the like can be easily inserted into the back side of the pull tab 11. Two intersection windows 22 and 32 are provided at the top and bottom of the cutout 12. The intersection windows 22 and 32 are both bent in the middle, and the left side portion thereof extends in the horizontal direction (the circumferential direction of the side peripheral wall 13), while the right side portion thereof extends in the oblique direction.

  The inner peripheral surface of the side peripheral wall 13 is provided with a plurality of weak lines starting from the cutout 12, and transverse lines 21 and 31 extend from both upper and lower ends of the cutout 12. Further, there are intersection windows 22 and 32 at the ends of the transverse lines 21 and 31, and when passing the intersection windows 22 and 32, they are connected to the descending line 23 and the ascending line 33. By completely tearing down the descending line 23, the side peripheral wall 13 is divided below the cutout 12. Further, by completely tearing the annular wire 34 through the ascending wire 33, the side peripheral wall 13 is divided into upper and lower parts. However, the loop line 34 is not a perfect loop because of the balance with the ascending line 33. Therefore, even after tearing the annular wire 34, the upper and lower parts are not completely separated.

  FIG. 3 shows a state in which the cap of FIG. 1 is fitted in the neck portion 52 of the bottle 51 and a state in which the pull tab 11 is slightly pulled out after that. When the cap is fitted into the neck portion 52, the stopper 45 illustrated in FIG. 2 enters under the ridge 55, and the cap cannot be detached from the bottle 51 as illustrated in the upper part of FIG. 3. After that, the entire content of the bottle 51 is consumed, and when disposing of the bottle 51, in order to remove the cap from the bottle 51, a finger or the like is inserted into the cutout 12, and as shown in the lower part of FIG. Pull it out.

  The upper end of the cutout 12 extends long in the circumferential direction of the side peripheral wall 13, but the lower end of the cutout 12 is relatively short. Therefore, as shown in the lower part of FIG. 3, when the pull tab 11 is pulled outward, the lower traverse line 21 starts to be torn first, and then the upper traverse line 31 starts to tear, and eventually the respective traverse lines 21, 31. Is completely torn, and the intersection windows 22 and 32 and the cutout 12 are connected. Thus, by adjusting the arrangement of the upper and lower traverse lines 21 and 31, only one traverse line 21 is initially torn, and it is not necessary to apply a large force at one time.

  FIG. 4 shows a state after FIG. 3 and immediately before the cap is removed. When the pull tab 11 is further moved to the right in the drawing from the state illustrated in the lower part of FIG. 3, the lower transverse line 21 to the lower line 23 are completely torn as illustrated in the upper part of FIG. The cutout 12 connects to the outside. At the same time, the upper transverse line 31 is completely torn, the adjacent intersection windows 32 are also vertically divided, and the ascending line 33 is also partially torn. By the arrangement of the upper and lower intersection windows 22, 32, when the tearing of the ascending line 33 starts, the tearing of the descending line 23 has already been completed, and the descending line 23 and the ascending line 33 are not torn at the same time. Therefore, a large amount of force is not required for a series of tears, and the work can be performed without difficulty.

  The ascending line 33 is connected to the annular line 34, and when the ascending line 33 is torn, the tearing of the annular line 34 starts as illustrated in the lower part of FIG. At this stage, the side peripheral wall 13 located below the annular line 34 is pulled out in a band shape, and the stopper 45 is also pulled out to the outside in response to this. Then, when the pull tab 11 is rotated once, the tearing of the annular wire 34 is completed, most of the side peripheral wall 13 is pulled out in a strip shape, and the stopper 45 is separated from the convex strip 55. Therefore, the entire cap including the top plate 17 can be removed from the bottle 51. Since the loop wire 34 is not a perfect loop, the pull tab 11 and the like do not come off the top plate 17.

  FIG. 5 shows an arrangement example of the intersection windows 22 and 32. The intersection windows 22 and 32 play a role of reducing the reaction force when the pull tab 11 is pinched, and the movement speed of the pull tab 11 inevitably increases, and the weak line ahead can be violently torn. However, the intersection windows 22 and 32 are not necessarily arranged on both sides of the base of the pull tab 11, but may be arranged only on one side as shown in this figure. The cap drawn in the upper part of FIG. 5 has an intersection window 32 provided only above the pull tab 11, and the transverse line 21 below the pull tab 11 is connected to the descending line 23. On the other hand, in the cap drawn in the lower part of FIG. 5, the intersection window 22 is provided only on the lower side of the pull tab 11, and the transverse line 31 above the pull tab 11 is connected to the upward line 33. Note that various fragile lines such as the annular line 34 are formed on the inner peripheral surface side of the side peripheral wall 13 as in FIG.

  FIG. 6 shows an example of the shape of the intersection windows 26 and 36. The intersection windows 22, 26, 32, and 36 are formed at the connection points between the transverse line 21 and the descending line 23 or at the junction points between the transverse line 31 and the ascending line 33. Reference numeral 32 was a form in which the inner surface of the weak line was dug down and penetrated, and the outer shape was a V-shape having a bend. However, other forms are possible, as depicted in FIG.

  In FIG. 6, the circular intersection windows 26 and 36 are arranged vertically, but at the connection point of the transverse line 31 (upper side) and the ascending line 33, the intersection windows having a diameter larger than the lateral width of these weak lines. 36 is formed. Further, an intersection window 26 having a diameter corresponding to the lateral width of these weak lines is formed at the connection point between the transverse line 21 (lower side) and the downward line 23. The diameters of the intersection windows 26 and 36 are determined in consideration of various circumstances such as the peripheral shape. In addition, the intersection windows 26 and 36 in FIG. 6 are circular because they are formed by cutting, but of course, other shapes may be used.

11 Puller 12 Cutout 13 Side peripheral wall 17 Top plate 18 Pouring outlet 19 Hanging wall 21 Traverse line (weak line / lower side)
22 Intersection window (lower side)
23 Down line (weak line)
26 intersection window (circular, lower side)
31 Transverse line (weak line / upper side)
32 intersection window (upper side)
33 Ascending line (weak line)
34 Loop line (weak line)
36 intersection window (circular / upper side)
45 Stopper (restraint)
51 bottle 52 neck 53 bellows 55 ridge (restriction means)
59 Inside plug

Claims (1)

A cap that fits on the neck (52) of the bottle (51),
A top plate (17) for closing the end surface of the neck portion (52), a side peripheral wall (13) surrounding the neck portion (52), and restraining means for integrating with the bottle (51),
The side wall (13) is provided with a puller (11) and a weak line extending from the base of the puller (11) in order to release the function of the restraint means.
The pull tab (11) is arranged between the restraint means and the lower end surface of the side peripheral wall (13) ,
The line of weakness comprises an annular line (34), a transverse line (21, 31), a descending line (23) and an ascending line (33),
The annular wire (34) is arranged above the restraint means and extends so as to make a complete turn along the circumferential direction of the side peripheral wall (13),
The transverse lines (21, 31) are composed of two rows starting from the upper part and the lower part of the base of the puller (11), and both extend in the circumferential direction of the side peripheral wall (13),
The descending line (23) is disposed below the pull tab (11) and extends obliquely toward the lower end surface of the side peripheral wall (13),
The ascending line (33) is arranged above the pull tab (11) and extends obliquely toward the annular line (34),
Where the transverse line (21) located under the puller (11) connects with the descending line (23) at an intersection, and the transverse line (above) located above the puller (11) ( Regarding a point where 31) is connected to the ascending line (33) with an intersection angle, an intersection point window (22, 26, 32, 36) are provided.

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