JP7389460B2 - cap - Google Patents

Description

The present invention relates to a cap attached to the mouth of a container.

A cap attached to the mouth of a container is disclosed, for example, in Patent Document 1 and the like. As shown in FIGS. 12 to 14, the cap 50 includes an inner stopper 53 that is attached to the mouth 52 of the container 51, and an upper lid 54 that can be attached to and detached from the inner stopper 53 by rotating. There is. The inner plug 53 has a planned opening portion 56 surrounded by a weakened portion 55, and as shown in FIG. 15, when the weakened portion 55 breaks and the planned opening portion 56 separates from the inner plug 53, A spout 75 is formed in the inner stopper 53. In addition, when attaching the upper lid 54 to the inner stopper 53 during the manufacturing and assembly process of the cap, as shown in FIG. The upper lid 54 is attached to the inner plug 53 by moving the upper lid 54 relatively downward.

The upper lid 54 is provided with a cylindrical inner holding part 57 and an outer holding part 58 for holding the intended opening part 56 when the intended opening part 56 is opened and unsealed. In the inner holding portion 57, a plurality of holding engagement ribs 57a are formed at predetermined angles in the circumferential direction and extend vertically while projecting outward in the radial direction. A plurality of holding engagement ribs 58a are formed on the outer holding portion 58 at predetermined angles in the circumferential direction and extend vertically while protruding inward in the radial direction.

A detachment cylindrical portion 59 is formed in the planned opening portion 56 and extends upward in a cylindrical shape from the periphery thereof. The disengagement cylindrical portion 59 includes a disengagement inner engagement rib 59a that extends vertically while protruding radially inward, and a disengagement outer engagement rib 59b that extends vertically and projects radially outward. A plurality of them are formed at predetermined angles in the circumferential direction. Then, by rotating the upper lid 54 with respect to the inner plug 53 while the upper lid 54 is fitted (covered) with the inner plug 53, the holding engagement rib 57a of the inner holding part 57 is shaped into a detachable cylindrical shape. At the same time, the retaining engagement rib 58a of the outer holding part 58 engages with the detaching outer engaging rib 59b of the detachable cylindrical part 59, so that the weakened part 55 The cap 50 is configured to be opened when the cap 50 is broken and the intended opening portion 56 is held by the inner holding portion 57 and the outer holding portion 58.

The inner stopper 53 includes a dispensing tube 60 that protrudes upward from the outer periphery of the weakened portion 55, a cylindrical outer tube portion 61 whose lower part fits into the mouth portion 52 of the container 51 from the outside, and an outer tube portion 61. A cylindrical inner cylinder part 62 which is provided with a gap on the inner periphery of the container 51 and whose lower part fits into the mouth part 52 of the container 51 from inside, and an upper end part of each of the outer cylinder part 61 and the inner cylinder part 62. An upper surface part 63 that extends radially inward to connect the outer cylinder part 61 and the inner cylinder part 62 and is placed on the upper end of the mouth part 52 of the container 51; a stepped portion 64 that protrudes from the outside and is connected around the entire circumference to approximately the center in the height direction of the spouting tube 60 on the inner circumferential side; a male threaded portion 65 formed on the outer circumferential surface of the stepped portion 64; A flange-like portion 66 is formed below the portion 61 and extends downward through a thin-walled portion, and also protrudes to the outer and inner circumferential sides in the radial direction.

The upper lid 54 includes a substantially disc-shaped top plate 67, a cylindrical outer peripheral wall 68 that hangs down from the top plate 67, and whose lower end can come into contact with the upper end surface of the brim 66 of the inner stopper 53. A cylindrical threaded cylinder (inner part) 69 that hangs down from a location inside the outer circumferential wall 68 of the top plate 67 so that its lower end can come into contact with the upper surface 63 of the inner plug 53, and a lower inner periphery of the threaded cylinder 69. A female threaded portion 70 is formed on the surface and can be screwed into the male threaded portion 65 of the inner stopper 53, and a female threaded portion 70 is suspended from a location inside the threaded tube 69 on the top plate 67 so as to be able to contact the pouring tube 60 of the inner stopper 53. A cylindrical portion 71 for sealing the pouring tube and the like are formed.

Here, as shown in FIG. 13, the weakened parts 55 include the holding engagement ribs 57a of the inner holding parts 57 that engage with each other, the detachment inner engagement ribs 59a of the detachable cylindrical part 59, and the outer holding parts 58. It is arranged below the retaining engagement rib 58a and the disengagement outer engagement rib 59b of the disengagement cylindrical portion 59.

In addition, the inner stopper 53 has a stepped portion 64 having a male screw portion 65 formed on its outer periphery protruding upward from an upper surface portion 63 that is placed on the upper end of the mouth portion 52 of the container 51. A spouting tube 60 is further extended upward from the inner circumferential portion of the portion. Here, it is desirable that the height H3 extending upward from the stepped portion 64 of the dispensing tube 60 has a certain dimension that allows the contents in the container 51 to be dispensed satisfactorily. Therefore, the inner stopper 53 needs to have a relatively large height from the brim portion 66 of the inner stopper 53 against which the lower end of the upper lid 54 (the lower end of the outer peripheral wall 68) comes into contact. Accordingly, the height H2 of the cap 50 also needs to be relatively large.

JP 2019-6431 Publication

However, according to the conventional cap 50 as described above, in order to open the lid, the upper lid 54 is rotated relative to the inner stopper 53, and the retaining engagement ribs 57a and 58a are connected to the inner engagement rib 59a for detachment. When engaged with the outer engagement rib 59b, since the weakened portion 55 is located below these engagement points (vertical range L2), the inner engagement rib for disengagement 59a and the outer engagement rib for disengagement are The force transmitted to the joining rib 59b is transmitted to the lower weakened portion 55 in a twisted manner, causing it to break. Therefore, the force transmitted to the disengagement inner engagement rib 59a and the disengagement outer engagement rib 59b is dispersed and transmitted to locations other than the weakened portion 55, and a relatively large force is required to open the package. There is a possibility that the weakened portion 55 may fail to break.

The present invention solves the above problems, and aims to provide a cap that can break the weakened portion well and reliably even with a small force.

In order to solve the above problems, the present invention includes an inner stopper that is attached to the mouth of a container, and a top cover that can be attached to and detached from the inner stopper by rotating it with a screw, and the inner stopper is surrounded by a weakened part. It has an enclosed planned opening part, and the upper lid and the inner plug are each provided with engaging ribs that engage with each other by rotating with the upper lid attached to the inner plug, and the upper lid is attached to the inner plug. The cap is a cap in which a rotational force is transmitted through the engagement rib when the cap is rotated, the weakened part is broken, the planned opening part is separated from the inner stopper, and a spout is formed in the inner stopper. When the is attached to the inner stopper, a weakened part is placed within the upper and lower range where the engagement ribs of the top cover and the inner stopper engage with each other, and the bottom part is located below the weakened part in the planned opening part of the inner stopper. A recessed cylinder is formed, and an engaging rib is formed on the inside of the side wall of the cylinder so as to extend vertically from a position below the weakened part to a position above the weakened part. An upper surface part that rests on the mouth part from above, a recessed part recessed downward inside the upper surface part, and a stepped cylindrical part extending upward from the inside of the bottom of the recessed part are formed, and the stepped cylindrical part A male threaded portion is formed on the outer peripheral side wall of the top lid to be screwed into the female threaded portion of the top lid, and the top lid has a connecting portion between the top plate, the outer peripheral wall portion extending downward from the outer periphery of the top plate, and the upper end of the outer peripheral wall portion of the top plate. The threaded tube extends downward from the inside and has a female threaded portion formed on the inner periphery of the lower part, and the holding tube extends downward from the inside of the connecting portion of the top plate with the screw tube. The tube is arranged such that its lower part protrudes into the recess when the upper cover is attached, and the engagement rib of the upper cover has a vertical engagement surface extending vertically radially outward from the holding tube and a base end thereof. The engagement rib of the inner stopper has a vertical engagement surface that extends vertically inward in the radial direction from the side wall of the cylinder body, and the engagement rib of the inner plug has a vertical engagement surface that extends away from the vertical engagement surface as it approaches the proximal end. The vertical engaging surfaces of the upper lid and the inner stopper are surfaces that engage with each other, and the lower end of the engaging rib of the upper lid has an inclined surface that extends radially outward toward the top. The upper end of the engagement rib of the inner stopper has an inclined surface extending radially outward toward the bottom . In this case, it is preferable that the weakened portion is disposed approximately in the middle of the upper and lower ranges where the engaging ribs engage with each other.

According to the above configuration, the weakened portion is arranged within the upper and lower range where the engagement ribs of the top lid and the inner plug engage with each other, so in order to open the bag, the upper lid is attached to the inner plug and the upper lid is engaged. When the upper lid is rotated relative to the inner stopper with the ribs and the engagement ribs of the inner stopper engaged, the force transmitted from the engagement rib of the upper cover to the engagement rib of the inner stopper is twisted and dispersed. It is well transmitted to the weakened part without any damage. As a result, the weakened portion can be broken effectively and reliably even with a small force.

With this configuration, the weakened portion can be satisfactorily arranged within the upper and lower ranges where the engaging ribs of the top lid and the inner stopper engage with each other. In addition, since there is a weakened part in the upper and lower ranges where the engagement ribs of the top lid and the inner plug engage with each other, the upper and lower regions where the engagement ribs of the top lid and the inner plug engage with each other, like in conventional caps, are weakened. The vertical dimension (i.e., height) of the cap can be made smaller (i.e., lower) compared to the case where a weakened part is provided at the bottom. It becomes possible to reduce the raw material cost by reducing the amount of water.

According to this configuration, a recessed part is formed in the inner stopper and is recessed downward inside the upper surface part that rests on the mouth of the container from above, and the lower part of the screw tube of the top lid is inserted into this recessed part. be. Therefore, compared to a conventional cap in which the entire inner part where the internal thread is formed is located above the top surface of the inner plug when the top lid is attached, the vertical dimension of the cap is (that is, height) can be reduced (that is, lowered), and in turn, it is possible to reduce the amount of constituent material (for example, resin) of the cap, thereby reducing raw material costs. Also, when opening the bag, when rotating the top cover relative to the inner stopper, the threaded tube of the top cover is pushed into the recess of the inner stopper, so the stepped tube located inside the screw tube of the inner stopper The side wall of the cylindrical body, on which the shaped portion and the engagement rib are formed, becomes difficult to deform in the radial direction. As a result, when rotating the top lid relative to the inner stopper, the force from the engagement rib of the top cover is easily transmitted to the engagement rib of the inner stopper, and even a small force can effectively and reliably remove the weakened part. Can be broken. In addition, if the top lid is made of a harder material than the inner stopper, the lower part of the screw tube of the top cover is inserted into the recess of the inner stopper, so even when the container is filled with contents at high temperature, the cap When worn, it is less likely to be deformed by heat, and its heat resistance is improved.

Further, in the present invention, the inner stopper is formed with a pouring tube extending upward from the stepped top part of the stepped cylindrical part, and the top cover is formed with a spouting tube extending downward from inside the connection part with the top end of the threaded tube in the top plate. It is characterized by being formed with a spout barrel sealing cylindrical portion that extends and can come into contact with the spout barrel of the inner stopper.

With this configuration, the inner stopper can be well formed with a spout tube extending upward from the stepped top surface of the stepped cylindrical part, and when the top lid is attached, the spout tube of the inner stopper can be formed. By bringing the spout barrel sealing cylindrical portion of the top lid into contact with each other, it is possible to seal the spout barrel well.

Further, the present invention is characterized in that the female threaded portion of the top lid and the male threaded portion of the inner stopper are made of multi-thread threads, and the female threaded portions and the male threaded portions are stacked vertically. With this configuration, the vertical difference in the circumferential direction of the female threaded part of the top lid and the male threaded part of the inner stopper is reduced, so when capping the top cover and attaching it to the inner stopper, it is difficult to position the top cover in the circumferential direction with respect to the inner stopper. Even if this is not done strictly, fluctuations in the vertical position of the top cover with respect to the inner stopper after capping are reduced, and it is possible to prevent the female threaded part of the top cover and the male threaded part of the inner stopper from being screwed together in an abnormal state.

According to the present invention, when the upper lid is attached to the inner stopper, the weakened portion is arranged within the upper and lower range where the engagement ribs of the upper cover and the inner stopper engage with each other, so that the upper cover can be attached to the inner stopper. When the upper lid is rotated with respect to the inner stopper with the engagement ribs of the upper cover and the inner stopper engaged, the vibration is transmitted from the engagement rib of the upper cover to the engagement rib of the inner stopper. The force is well transmitted to the weakened part without being twisted and dispersed, and the weakened part can be broken well and reliably even with a small force, improving the reliability of the cap.

In addition, a cylindrical body whose bottom part is recessed below the weakened part is formed in the planned opening part of the inner stopper, and a cylindrical body is formed inside the side wall of the cylindrical body from a position below the weakened part to a position above the weakened part. By forming the engagement ribs that extend vertically up to 100 degrees, the weakened portion can be satisfactorily arranged within the vertical range where the engagement ribs of the top lid and the inner stopper engage with each other. In addition, it is possible to reduce (i.e., lower) the vertical dimension (i.e., height) of the cap, which in turn makes it possible to reduce the amount of constituent materials (such as resin) for the cap, thereby reducing raw material costs. .

In addition, the inner stopper has a recessed part that is recessed below the top surface that rests on the mouth of the container from above, and the screw tube of the top lid is inserted into this recessed part. The vertical dimension (i.e., height) of the cap can be reduced (i.e., lowered), the amount of constituent material of the cap can be reduced, and raw material costs can be reduced. Moreover, according to this configuration, the side wall of the cylinder in which the stepped cylindrical part and the engagement rib are formed, which is located inside the threaded cylinder of the inner stopper, is reinforced so that it is difficult to deform in the radial direction. Therefore, this also makes it easier for the force from the engagement rib of the top cover to be transferred to the engagement rib of the inner stopper when rotating the top cover with respect to the inner stopper, and in turn, even a small force can effectively remove the weakened part. And it can be broken reliably. In addition, in this case, by making the top lid made of a harder material than the inner stopper, even when the container is filled with contents at high temperatures, it is less likely to be deformed by heat when the cap is attached, improving heat resistance. It also has the effect of

In addition, the female threaded part of the top lid and the male threaded part of the inner plug are made of multi-start threads, and the female threaded parts and the male threaded parts are stacked vertically, so that the top lid can be plugged and attached to the inner plug. In this case, even if the upper lid is not precisely positioned in the circumferential direction with respect to the inner stopper, fluctuations in the vertical position of the upper cover with respect to the inner stopper after capping are reduced, and the female threaded part of the upper cover and the male threaded part of the inner stopper are It can prevent screwing together in an abnormal state. This makes it possible to omit the work of positioning the top lid in the circumferential direction when plugging the top lid and attaching it to the inner stopper, improving work efficiency.

FIG. 2 is a front view of a cap according to an embodiment of the present invention. It is a top view of the same cap. It is a longitudinal cross-sectional view of the same cap. It is a longitudinal cross-sectional view of the same cap, showing a state in which the intended opening portion is separated from the inner stopper and opened. It is a front view of the inner stopper of the same cap. It is a top view (top view) of the inner stopper of the same cap. It is a longitudinal cross-sectional view of the inner stopper of the same cap. It is a longitudinal cross-sectional view of the upper lid of the same cap. It is a bottom view (bottom view) of the upper lid of the same cap. FIG. 3 is an enlarged plan cross-sectional view schematically showing a state in which the engaging ribs of the cap engage with each other. It is a longitudinal cross-sectional view of the same cap, showing the state immediately before the upper lid is plugged into the inner stopper. It is a front view of a conventional cap. It is a longitudinal cross-sectional view of the same conventional cap. 14 is a cross-sectional view of the conventional cap taken along the line XX in FIG. 13. FIG. It is a longitudinal cross-sectional view of the same conventional cap, showing a state in which the intended opening portion is separated from the inner stopper and opened. It is a longitudinal cross-sectional view of the same conventional cap, showing the state immediately before the top lid is plugged into the inner stopper.

EMBODIMENT OF THE INVENTION Hereinafter, the cap of embodiment based on this invention is demonstrated based on drawing.
In FIGS. 1 to 3, reference numeral 1 denotes a cap attached to a container 2 in which contents (content liquid) are stored. As shown in FIGS. 1 to 3, the cap 1 includes an inner stopper 4 that is attached to the mouth 3 of the container 2, and an upper lid 5 that can be attached to and removed from the inner stopper 4 by rotating with a screw. . The inner plug 4 and the upper lid 5 are each manufactured by, for example, injection molding of synthetic resin, and have the property of being elastically deformable. The upper lid 5 is made of a harder material than the inner plug 4. For example, the upper lid 5 is made of polypropylene, which does not easily deform even at high temperatures, and the inner plug 4 is made of polyethylene, but the material is not limited to these materials. do not have.

Further, as shown in FIGS. 1 to 3, the upper lid 5 and the inner plug 4 have engaging ribs 7 and 8, respectively, which engage with each other when the upper lid 5 is rotated with the inner plug 4 attached. It is provided. When the upper lid 5 is rotated while attached to the inner stopper 4, rotational force is transmitted through the engagement ribs 7 and 8, and as a result, as shown in FIG. 4, a weakened portion 11 (described later) is broken. The planned opening portion 12 is separated from the inner stopper 4 and the spout 6 is formed in the inner stopper 4. As shown in FIG. 3, when the upper lid 5 is attached to the inner plug 4, the weakened portion 11 is located within the upper and lower range L1 where the engagement ribs 7 and 8 of the upper lid 5 and the inner plug 4 engage with each other. It is located.

Each part of the cap 1 will be explained in detail below.
As shown in FIGS. 3 to 6, the inner stopper 4 includes an inner stopper main body 10 attached to the mouth 3 of the container 2, and a weakened part 11 surrounding the inner stopper 4. The opening portion 12 is provided in a removable manner. The inner stopper main body 10 includes a spouting cylinder 16 that projects upward from the center (the outer periphery of the weakened part 11), a cylindrical outer cylinder part 13 whose lower part fits into the mouth part 3 of the container 2 from the outside, and an outer part. A cylindrical inner cylinder part 14 that is provided with a gap on the inner periphery of the cylinder part 13 and whose lower part fits into the mouth part 3 of the container 2 from the inside, and upper ends of the outer cylinder part 13 and the inner cylinder part 14, respectively. An upper surface portion 15 extends radially inward at a portion to connect the outer cylinder portion 13 and the inner cylinder portion 14 and rests on the mouth portion 3 of the container 2 from above, and a top surface portion 15 extends upwardly from a portion on the inner periphery of the upper surface portion 15. A stepped cylindrical portion 17 is formed which protrudes into a cylindrical shape with a cylindrical shape and is connected around the entire circumference to approximately the center in the height direction of the spouting tube 16 on the inner peripheral side.

A flange-shaped part 19 is formed on the entire circumference of the lower part of the outer cylinder part 13 and extends downward through the thin-walled part 18A and also protrudes radially outward and inward. By cutting the brim portion 19 from the vertical thin groove portion 18B and the thin portion 18A formed in the shaped portion 19, it is intended that the inner stopper 4 can be easily removed from the container 2.

Further, the inner plug main body 10 is formed with a recessed portion 20 that is recessed below the upper surface portion 15 on the inner peripheral side of the upper surface portion 15 of the inner plug main body 10. Further, a stepped cylindrical portion 17 is formed so as to extend upward from the inner peripheral side of the bottom of the recessed portion 20 . A male threaded portion 21 is formed on the outer peripheral side wall 17a of the stepped cylindrical portion 17 and is threaded into a female threaded portion 34 (described later) of the upper lid 5. Further, from the inner periphery of the stepped top surface portion 17b of the stepped cylindrical portion 17, the pouring tube 16 is extended in an upwardly protruding posture. The weakened portion 11 is formed on the inner periphery of the stepped cylindrical portion 17 from the lower end of the spout tube 16 .

Then, a cylindrical body 22 whose bottom part 22a is recessed below the weakened part 11 is formed in the opening planned part 12 inside the weakened part 11 of the inner stopper 4, and inside the side wall 22b of the cylinder 22, the weakened part 12 is recessed. The engagement rib 7 is formed to extend vertically from a position below the portion 11 to a position above the weakened portion 11. Further, in this embodiment, the engagement ribs 7 of the inner stopper 4 are provided at 30 degree intervals in the circumferential direction when viewed from above (that is, the 12 engagement ribs 7 are provided at equal intervals in the circumferential direction). ) is not limited to this.

As shown in FIGS. 1 to 3, FIG. 8, FIG. 9, etc., the upper lid 5 includes a substantially disk-shaped top plate 31, an outer peripheral wall portion 32 extending downward from the outer periphery of the top plate 31, and a top plate 31. A threaded cylinder (inner part) 33 that extends downward from inside the connection part with the upper end of the outer peripheral wall 32 at 31 and whose lower part projects into the recess 20 of the inner stopper 4; A spout cylinder sealing cylinder part that extends downward from inside the connection part between the formed female thread part 34 and the upper end of the threaded cylinder 33 on the top plate 31 and can contact the spout cylinder 16 of the inner stopper 4 from the inside. 35 etc. are formed. An uneven surface is provided on the outer periphery of the outer peripheral wall portion 32 by so-called knurling, so that when turning the upper lid 5, the fingers do not slip easily and the rotational force from the fingers is transmitted to the upper lid 5 well. ing. Further, when the upper lid 5 is attached to the inner plug 4, the lower end surface of the outer peripheral wall portion 32 is formed to rest on the upper surface of the flange-shaped portion 19 of the inner plug 4.

Further, the upper lid 5 is formed with a cylindrical holding part (holding cylinder part) 36 that extends downward from inside the connection part of the top plate 31 with the upper end of the spout cylinder sealing cylinder part 35 . Engagement ribs 8 are formed on the outside of the holding part 36 so as to extend vertically from the upper end to the lower end of the holding part 36. That is, as shown in FIG. 3, when the upper lid 5 is attached to the inner plug 4, the weakened portion 11 is within the upper and lower range L1 where the engagement ribs 7, 8 of the upper lid 5 and the inner plug 4 engage with each other. It is located. Further, in this embodiment, the weakened portion 11 is arranged at a substantially intermediate position of the upper and lower range L1 where the engagement rib 7 of the inner stopper 4 and the engagement rib 8 of the upper lid 5 engage. Further, in this embodiment, the engagement ribs 8 of the upper lid 5 are provided at intervals of 30 degrees in the circumferential direction (i.e., 12 (the engagement ribs 8 are provided at equal intervals in the circumferential direction), but the invention is not limited to this.

In addition, in this embodiment, as shown in an enlarged and simplified manner in FIG. 10, when the top lid 5 is rotated in the opening direction (in the direction of arrow O shown in FIG. 10) during opening, the inner stopper 4 is not engaged. In order to ensure that the rib 7 and the engagement rib 8 of the upper lid 5 engage more reliably, the surfaces of the engagement ribs 7 and 8 that engage with each other at this time are provided with a groove extending radially inward from the side wall 22b of the cylindrical body 22. A vertical engagement surface 7a extending vertically and a vertical engagement surface 8a extending vertically radially outward from the holding portion 36 are formed. On the other hand, on the opposite side of the engaging ribs 7 and 8, inclined surfaces 7b and 8b that are gently inclined in the radial direction from the side wall 22b of the cylinder body 22 and the holding portion 36 are formed. As shown in Fig. 11, sloped surfaces 7c and 8c are also formed at the longitudinal ends of each of the engagement ribs 7 and 8, so that the engagement ribs 7 and 8 can easily get into the gap between each other during capping. It is designed to fit (fit in without buffering).

Further, as described above, the inner plug 4 has a male threaded part 21 formed on the outer peripheral side wall 17a of the stepped cylindrical part 17, and the upper lid 5 has a female threaded part 34 formed on the lower inner periphery of the threaded cylinder 33. However, as shown in FIGS. 5 and 8, these are composed of multi-start threads (threads having multiple threads between one pitch). Further, the male threaded portions 21 and the female threaded portions 34 are formed to be stacked vertically. In this embodiment, the male threaded portion 21 and the female threaded portion 34 are configured with six threads, but the invention is not limited to this. That's fine.

In the above configuration, when assembling the upper lid 5 to the inner stopper 4, as shown in FIG. Attach to inner stopper 4. As a result, as shown in FIG. 3, the holding portion 36 of the top lid 5 on which the engagement rib 8 is formed is inserted into the cylinder body 22 of the inner stopper 4 on which the engagement rib 7 is formed. Further, the lower part of the screw cylinder 33 of the upper lid 5 is inserted into the recessed part 20 of the inner stopper 4.

The unused cap 1 with the top lid 5 capped and attached to the inner stopper 4 in this manner is attached to the mouth 3 of the container 2. Note that in this state, the scheduled opening portion 12 is closed and not opened, so that the inside of the container 2 is kept well sealed.

When opening the cap 1 and pouring out the contents in the container 2, the upper lid 5 is rotated in the opening direction (O direction). When the top lid 5 is rotated in the unsealing direction (O direction) in this way, the engagement rib 8 formed on the holding portion 36 of the top lid 5 is rotated to the engagement rib 7 formed on the cylindrical body 22 of the inner stopper 4. The rotational force (rotational torque) that rotates the upper lid 5 is transmitted to the weakened portion 11 via the engagement ribs 7 and 8, and the weakened portion 11 is broken. Note that after this, the planned opening portion 12 is unsealed to form the spout 6, and the planned opening portion 12 is held by the holding portion 36 engaged with the engagement ribs 7 and 8.

When the engaging ribs 7 and 8 are engaged with each other in this way, the weakened portion 11 is arranged within the upper and lower range L1 where the engaging ribs 7 and 8 of the upper lid 5 and the inner plug 4 engage with each other. This minimizes the rotational force (rotational torque) transmitted from the engagement rib 8 of the top lid 5 to the engagement rib 7 of the inner stopper 4 from being twisted and dispersed vertically. It is transferred to the weakened portion 11 in a good manner. As a result, the weakened portion 11 can be broken well and reliably even with a relatively small force, the planned opening portion 12 can be opened well to form the spout 6, and the reliability of the cap 1 is improved.

In particular, in this embodiment, since the weakened portion 11 is arranged approximately in the middle of the upper and lower range L1 where the engaging ribs 7 and 8 engage with each other, The rotational force (rotational torque) transmitted to the engagement rib 7 is transmitted extremely well to the weakened portion 11 without being twisted and dispersed vertically.

Further, according to the above configuration, the cylinder body 22 whose bottom part 22a is recessed below the weakened part 11 is formed in the opening planned part 12 of the inner stopper 4, and the weakened part is formed inside the side wall 22b of the cylinder body 22. The engagement rib 7 is formed to extend vertically from a position below the weakened portion 11 to a position above the weakened portion 11. With this configuration, the weakened portion 11 can be satisfactorily arranged within the upper and lower range L1 where the engaging ribs 7 and 8 of the inner stopper 4 and the upper lid 5 engage with each other.

Furthermore, in this way, the inner stopper 4 is formed with a cylinder 22 whose bottom part 22a is recessed below the weakened part 11, and the engagement rib 7 is formed inside this cylinder 22. As in the conventional cap 50 shown in FIG. 13, the retaining engagement ribs 57a and 58a of the upper lid 54 and the inner stopper 53 engage with the detachable inner engagement rib 59a and the detachable outer engagement rib 59b. Compared to the case where the weakened portion 55 is provided below the vertical range L2, the vertical dimension (that is, the height) H1 of the cap 1 can be made smaller (that is, lowered).

Further, according to the above configuration, the inner plug 4 is formed with a recessed portion 20 that is recessed below the upper surface portion 15, and when the upper lid 5 is attached, the female screw portion 34 is formed in the recessed portion 20 of the inner plug 4. The lower part of the threaded cylinder 33 is arranged so as to protrude therethrough. As a result, like the conventional cap 50 shown in FIG. 12 and FIG. ) The vertical dimension (i.e., height) H1 of the cap 1 can be made smaller (i.e., lower) than in the case where the entire cap 69 is disposed upward. That is, with these configurations, the vertical dimension H1 of the cap 1 can be reduced, so it is possible to reduce the amount of constituent material (for example, resin) of the cap 1, thereby reducing raw material costs.

Further, according to the above configuration, when the top lid 5 is attached to the inner stopper 4, the screw tube 33 of the top lid 5 is inserted into the recess 20 that is recessed inside the mouth 3 of the container 2. . Therefore, by constructing the upper lid 5 from a material harder than the inner stopper 4, such as polypropylene, even when the cap 1 is attached to the container 2 filled with high-temperature contents, the portion of the cap 1 that is attached to the container 2 is It becomes a structure that is difficult to deform and improves heat resistance.

In addition, when rotating the upper lid 5 with respect to the inner plug 4, since the threaded cylinder 33 of the upper lid 5 is inserted into the recessed part 20 of the inner plug 4, the step located inside the screw cylinder 33 of the inner plug 4 The side wall 22b of the cylindrical body 22, on which the attached cylindrical portion 17 and the engagement rib 7 are formed, is reinforced so that it is difficult to deform in the radial direction. As a result, when the top lid 5 is rotated relative to the inner stopper 4 during opening, the force from the engagement rib 8 of the top cover 5 is easily transmitted to the engagement rib 7 of the inner stopper 4, and as a result, , the weakened portion 11 can be broken well and reliably even with a small force.

Further, according to the above structure, the inner stopper 4 is formed with the spout tube 16 extending upward from the stepped top surface portion 17b of the stepped cylindrical portion 17, and this spout tube 16 is connected to the spout provided on the top lid 5. It is configured to be able to be sealed with a cylinder portion 35 for sealing the projecting tube. As a result, the dispensing cylinder 16 having the same length as the conventional one can be well formed in the inner stopper 4, and the contents inside the container 2 can be well dispensed, and the top lid 5 can be attached. In this case, the spout cylinder 16 of the inner stopper 4 can be brought into contact with the spout cylinder sealing cylinder part 35 of the upper lid 5 to seal the spout cylinder 16 well.

Further, according to the above configuration, since the female threaded portion 34 of the top lid 5 and the male threaded portion 21 of the inner stopper 4 are made of multi-thread screws, the top lid 5 can be easily opened and closed with a small rotation angle. It's convenient. Furthermore, since the female threaded portions 34 and the male threaded portions 21 are formed to overlap each other in the vertical direction, there are vertical steps t1 and t2 (Fig. 5, see FIG. 8) becomes smaller. As a result, when capping the top cap 5 and attaching it to the inner cap 4, the top cap 5 can be moved up and down relative to the inner cap 4 after capping, without having to strictly position the top cap 5 in the circumferential direction relative to the inner cap 4. Fluctuations in the directional position are reduced, and it is possible to prevent the female threaded portion 34 of the upper lid 5 and the male threaded portion 21 of the inner plug 4 from being screwed together in an abnormal state. As a result, it becomes possible to omit the work of positioning the upper lid 5 in the circumferential direction when capping the upper lid 5 and attaching it to the inner stopper 4, thereby improving work efficiency.

1 Cap 2 Container 3 Mouth 4 Inner stopper 5 Top lid 6 Spout 7, 8 Engagement rib 11 Weakened portion 12 Scheduled opening portion 13 Outer tube portion 14 Inner tube portion 15 Top portion 16 Spout tube 17 Stepped tube portion 19 Flange-like part 20 Hollow part 21 Male thread part 22 Cylindrical body 31 Top plate 32 Outer peripheral wall part 33 Threaded cylinder (inner part)
34 Female thread part 35 Pour cylinder sealing cylinder part 36 Holding part

Claims (5)

Equipped with an inner stopper that is attached to the mouth of the container, and a top lid that can be attached to and removed from the inner stopper by rotating,
The inner stopper has a planned opening portion surrounded by a weakened portion,
The upper lid and the inner plug are each provided with engagement ribs that engage with each other by rotating with the upper lid attached to the inner plug,
When the top cover is rotated while attached to the inner stopper, rotational force is transmitted through the engagement rib, which causes the weakened part to break and the intended opening part to separate from the inner stopper, forming a spout in the inner stopper. A cap that is
The weakened portion is arranged within the upper and lower range where the engagement ribs of the upper lid and the inner plug engage with each other when the upper lid is attached to the inner plug ,
A cylindrical body whose bottom part is recessed below the weakened part is formed in the planned opening part of the inner stopper,
An engagement rib is formed on the inside of the side wall of the cylinder so as to extend vertically from a position below the weakened part to a position above the weakened part,
The inner stopper is formed with an upper surface portion that rests on the mouth of the container from above, a recessed portion recessed downward inside the upper surface portion, and a stepped cylindrical portion extending upward from the inside of the bottom of the recessed portion,
A male threaded portion is formed on the outer peripheral side wall of the stepped cylindrical portion, and is threaded into the female threaded portion of the top cover.
A screw on the top cover that extends downward from the inside of the connecting portion between the top plate, the outer peripheral wall portion extending downward from the outer periphery of the top plate, and the upper end of the outer peripheral wall portion of the top plate, and has a female threaded portion formed on the lower inner periphery. The cylinder is formed with a holding cylinder part extending downward from inside a connecting part of the top plate with the threaded cylinder,
The screw cylinder is arranged so that the lower part thereof enters the recess when the upper cover is attached,
The engagement rib of the upper lid has a vertical engagement surface that extends vertically outward in the radial direction from the holding cylinder, and an inclined surface that is farther away from the vertical engagement surface closer to the base end,
The engagement rib of the inner plug has a vertical engagement surface that extends vertically inward in the radial direction from the side wall of the cylinder body, and an inclined surface that is farther away from the vertical engagement surface as it approaches the base end,
The vertical engagement surfaces of the top lid and the inner stopper are surfaces that engage with each other,
The lower end of the engagement rib of the upper lid has an inclined surface extending radially outward toward the top,
The upper end of the engagement rib of the inner plug has an inclined surface that extends radially outward toward the bottom.
A cap characterized by: 2. The cap according to claim 1, wherein the weakened portion is disposed approximately in the middle of the upper and lower ranges where the engaging ribs engage with each other. 3. The cap according to claim 1, wherein the upper lid is made of a harder material than the inner stopper. A spout tube extending upward from the stepped top surface of the stepped cylindrical portion is formed in the inner stopper,
A claim characterized in that the upper lid is formed with a spout cylinder sealing cylinder part that extends downward from inside the connection part with the top end of the screw cylinder on the top plate and can come into contact with the spout cylinder of the inner stopper. 2. The cap according to 1 or 2 . Any one of claims 1 to 4 , characterized in that the female threaded portion of the top lid and the male threaded portion of the inner stopper are made of multi-thread threads, and the female threaded portions and the male threaded portions are stacked vertically. The cap according to item 1.

Images