JP3899349B2 - Opening and closing cap and method for manufacturing the same - Google Patents

Description

  The present invention relates to an opening / closing cap for a container pouring part which is attached to an opening part of a pouring part of a packaging container and opens and closes the mouth part, and a manufacturing method thereof.

  In order to open and close the cylindrical pouring part provided in the packaging container, there is a structure of a mouth plug part in which an opening / closing cap is detachably screwed into the mouth part of the pouring part. With respect to the structure of the plug portion, there is a type in which a band is provided at the lower portion of the cap body and the outer surface of the extraction portion is held by this band in order to securely hold the opening / closing cap in the extraction portion.

  For example, the open / close cap described in Patent Document 1 is configured by arranging a band below the cap body and connecting the band to the cap body with a connecting piece. The band of the opening / closing cap is configured so that cut portions are formed at two locations in the circumferential direction and the band is divided into two in the circumferential direction. And each piece is connected to the cap main body by the connection part in the rear part in the direction which opens an opening-and-closing cap.

  In this opening / closing cap, the protrusion provided on the inner surface of each piece is engaged with the ratchet provided on the outer peripheral surface of the mouth portion on the container side to prevent the opening / closing cap from rotating in the opening direction. Is done. On the other hand, when the opening / closing cap is rotated in the opening direction, the protruding portion gets over the ratchet. At this time, a load is applied to the band, and the cutting portion connecting the pieces is cut.

  Thus, by confirming whether the band has been cut or not, the invention described in Patent Document 1 enables whether or not the cap is opened.

JP 2004-51195 A

  However, in the conventional open / close cap represented by the invention described in Patent Document 1, for example, as shown in FIG. 16, when the caps collide with each other during the conveyance, the band 100 is pushed inward in the radial direction and deformed. There was something to do. If such a deformation is maintained, the cutting part 101 connecting the pieces of the band 100 is cut by an impact or the like due to an impact or the like. In this case, the band 100 originally has. The function of the rotation stopper and the opening check cannot be demonstrated. In addition, the part of the code | symbol 102 of FIG. 16 is a processus | protrusion engaged with a ratchet.

  Therefore, the present invention provides an open / close cap that reliably prevents the deformation of the band and prevents the band from being cut, and a method for manufacturing the cap.

In the present invention, in order to solve the above-mentioned problem, a cap main body that is screwed into the outer peripheral surface of the pouring body of the packaging container to open and close the pouring body, and is provided so as to extend in the circumferential direction of the cap main body. An opening / closing cap comprising a band connected to the cap body by a piece, wherein the band is provided with at least one portion in the circumferential direction for separating the band in the circumferential direction, and the band is cut at this position. Connected to each other with possible connecting pieces, and in other words, a protrusion protruding toward the pouring body is formed inside the band, and the opening / closing cap is opened to the pouring body. The front side of the band with the connection piece interposed therebetween is rotated together with the cap body, while the rear side is the extraction of the protrusion. An opening / closing cap configured to be prevented from rotating by being caught by a part of the band and to be cut by the stress of the band generated thereby. The band is positioned below the cap body. The deformation is connected to the lower part of the cap body by the connecting piece, and the inner side of the band is pressed against the lower end of the cap body to prevent the band from being crushed inward in the radial direction. An opening / closing cap formed so that the prevention body is arranged inside the band was adopted.

  Regarding the above-mentioned opening / closing cap, as the deformation preventing body, a structure in which a plurality of protrusions are intermittently formed along the circumferential direction on the lower end surface of the cap body, or a torus protruding from the lower end of the cap body What was comprised can be employ | adopted.

  In the opening / closing cap according to the present invention, the cap body, the deformation preventing body, the band, the connecting piece, and the connecting piece are integrally formed by injection molding.

  Further, according to the present invention, in the above-described opening / closing cap, the cap main body is provided with a contact prevention portion that has at least the same diameter as the outer surface of the band and projects outward from the outer peripheral surface of the cap main body. And

Further, in order to solve the above problems, in the present invention, a cap body that is screwed into the outer peripheral surface of the pouring body of the packaging container to open and close the pouring body, and provided to extend in the circumferential direction of the cap body, A band connected to the cap main body by a connecting piece; and a deformation prevention body provided at a lower portion of the cap main body, the inner side of the band being pressed to prevent the band from being crushed radially inward. The band is provided with at least one circumferential portion for separating the band in the circumferential direction, and the band is connected to each other with a severable connecting piece at this position, and the cap body is is rotated relative to the spout body, projection projecting toward the Note Detai from the inside of the band with the rotation of the cap body Yue take the part of the watch Detai A manufacturing method for an opening / closing cap configured to cut the connection piece due to stress generated in the band when the cap body, the deformation preventing body, the band, the connection piece, and the connection piece are provided. An injection molding process in which the gap is formed between the upper end of the band and the lower end of the cap body with the lower end of the deformation prevention body and the lower end of the cap body. The band is molded in a state where it is connected to the cap body with the connecting piece so as to be larger than the dimension between, after the injection in this injection molding process, the band is pushed toward the cap body, The manufacturing method of the opening / closing cap provided with the pushing process which positions the said band on the outer peripheral side of the said deformation | transformation prevention body was adopted.

  According to the present invention, even when the band is pushed inward in the radial direction of the opening / closing cap, the band is pressed against the deformation preventing body and the deformation of the band is prevented. For this reason, even when other opening / closing caps or foreign objects are struck against the band, excessive stress is not generated on the connection piece, and the connection piece is not damaged.

  Thereby, the loosening prevention function, the falsification prevention function, and the falsification confirmation function that the opening / closing cap originally has can be exhibited.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of the spout unit 1 attached to the upper part of the container A. FIG. The plug unit 1 includes an opening / closing cap 2 according to an embodiment of the present invention and a dispensing unit 20. The spout unit 1 is attached to the upper end of the container A with its lower part inserted into the container A. When the opening / closing cap 2 is viewed from above, when the opening / closing cap 2 is rotated clockwise, the plug unit 1 is screwed into the dispensing portion 20 to seal the mouth portion 21. On the other hand, if it rotates counterclockwise, it will be removed from the extraction | pouring part 20. FIG.

  2 to 4 show the configuration of the opening / closing cap 2.

  The opening / closing cap 2 has a cap body 3 formed in a cylindrical shape and a band 10 provided at the lower end of the cap body 3 so as to extend in the circumferential direction of the opening / closing cap 2.

  The cap body 3 is constituted by a cylinder whose upper surface 4 is closed and whose lower part is opened. A spiral female screw 5 is formed on the inner surface, and is configured to be able to be screwed to the outer peripheral surface of the mouth portion 21. A cylindrical sealing body 6 protrudes downward from the inner surface of the upper surface 4 of the cap body 3 radially inward from the inner wall surface. When the opening / closing cap 2 is screwed into the mouth portion 21, the seal body 6 has its outer peripheral surface brought into close contact with the inner surface of the mouth portion 21 to prevent the contents from leaking out. On the other hand, on the outer peripheral surface 3 a of the cap body 3, ribs 7 that protrude radially outward are formed on the entire circumference.

  Further, a contact prevention portion 8 formed by projecting the lower portion of the cap body 3 outward in the radial direction is provided at the lower portion of the cap body 3. The outer surface 8 a of the contact prevention unit 8 prevents foreign matters such as other opening / closing caps from colliding with the band 10.

  On the other hand, the band 10 is disposed below the lower end surface 3 b of the cap body 3 and is connected to the lower end surface 3 b of the cap body 3 by connecting pieces 12 and 13. Further, the band 10 is divided into two band pieces 11 in the circumferential direction, and the end portions in the circumferential direction of these band pieces 11 are connected by connecting pieces 14. In the band 10, each band piece 11 constituting the band 10 is connected to the lower end surface 3 b of the opening / closing cap 2 by connecting pieces 12 and 13 at two places in the circumferential direction. These connecting pieces 12 and 13 are arranged on the inner peripheral side of each band piece 11.

  Of the two connecting pieces 12 and 13 provided on each band piece 11, the connecting piece 12 disposed on the front side in the opening direction X for loosening the opening and closing cap 2 is thin so as to be easily cut. The width is extremely narrow. On the other hand, the connecting piece 13 arranged on the rear side in the unsealing direction X to be loosened is formed with a large thickness and width so as not to be cut even when the opening / closing cap 2 is rotated.

  Further, claw portions 15 and 16 are formed at two locations on the inner peripheral surface of each band piece 11. One claw portion 15 is disposed at the front end portion of the cap body 3 in the opening direction X, and the other claw portion 16 is disposed slightly rearward in the opening direction X from the claw portion 15 on the front end side. The claw portions 15 and 16 are arranged at positions where the one formed on one band piece 11 and the one formed on the other band piece 11 are symmetrical with respect to the central axis of the opening / closing cap 2. Yes. And each claw part 15 and 16 is the inner surface of the band piece 11 so that it may incline a little in the direction of the opening direction X of the opening-and-closing cap 2 with respect to the radial direction which goes to the central axis of the opening-and-closing cap 2 from the inner surface of the band piece 11. Project from each.

  Furthermore, each band piece 11 is formed so that two trapezoidal protrusions 17 and 18 are overlapped. The protrusions 17 and 18 protrude from the inner surface of the band piece 11 in the radial direction toward the central axis of the opening / closing cap 2. Further, the protrusions 17 and 18 are also arranged at positions that are symmetric with respect to the central axis of the opening / closing cap 2. In addition, the position where the nail | claw part 16 of the back side of the opening direction X and the connection piece 12 formed thinly and narrowly are arrange | positioned, and the projection parts 17 and 18 and the connection piece 13 are arrange | positioned. The positions coincide with each other in the circumferential direction.

  FIG. 4 shows the positional relationship and shape details of the two protrusions 17 and 18. As shown in FIG. 4, the protrusions 17 and 18 are constituted by a combination of a low peak protrusion 17 and a high peak protrusion 18. A low peak protrusion 17 located on the front side in the opening direction X that loosens the opening / closing cap 2 is formed over the entire area of the band piece 11 in the height direction. On the other hand, the high peak protrusion 18 provided on the rear side in the opening direction X for loosening the opening / closing cap 2 is formed so as to occupy only the upper half in the height direction of the band piece 11.

  The low mountain protrusion 17 abuts against a deformation preventing portion which is a tip portion of a rib formed in the plug unit 1 described later, and prevents the band piece 11 from being deformed radially inward. On the other hand, the protrusion 18 which is a high mountain has a function of displacing each band piece 11 after the connection piece 14 is cut when the ratchet is overcome during the rotation of the cap, as will be described in detail later. is doing. Note that the protrusions 17 and 18 are formed in a trapezoidal shape, and the protrusions 17 and 18 have their tip surfaces appropriately in contact with the tip surface of the deformation preventing portion, and the protrusions 17 and 18 are ratchet portions. It is formed in a shape that does not get caught by the ratchet when passing through the position. Further, the side portions adjacent to each other are arranged so that the portions thereof overlap each other.

  In addition to the above configuration, the cap main body 3 is formed with a band deformation preventing body 9 that protrudes downward from the lower end surface of the cap main body 3 so as to be integrated with the cap main body 3. The band deformation preventing body 9 prevents the band 10 from being pushed inward in the radial direction of the opening / closing cap 2 even when another opening / closing cap 2 or the like is pressed against the band 10. The band deformation preventing body 9 is formed in an annular shape, and the outer diameter thereof is formed so as to form a predetermined gap with the inner surface of the band 10. That is, in a normal state, the outer diameter is formed so that the claw portions 15 and 16 and the projections 17 and 18 provided on the inner surface of each band piece 11 do not interfere with the band deformation preventing body 9. ing. On the other hand, the inner diameter is formed to be the same as the inner diameter of the cap body 3. In addition, as shown in FIG. 2, the band deformation preventing body 9 protrudes to such an extent that the lower end thereof coincides with a substantially central portion in the height direction of the band 10.

  The band deformation preventing body may be provided as shown in FIG. The structure of the opening / closing cap 2A shown in FIG. 5 is the same as that of the opening / closing cap 2 shown in FIGS. 1 to 4 except for the band deformation preventing body 9A. The description is omitted.

  In the open / close cap 2A shown in FIG. 5, a plurality of projections 9B are intermittently arranged in the circumferential direction on the inner side of the band 10 on the lower end surface of the cap body 3 to constitute a band deformation preventing body 9A. These protrusions 9B are formed so as to be evenly arranged in the circumferential direction of the opening / closing cap 2A. In addition, each protrusion 9 </ b> B is formed to have a height of about ½ to の of the height of the band 10. Thus, even when the band deformation preventing body 9A is formed, the band 10 can be effectively prevented from being pushed inward in the radial direction.

  FIG. 6 shows the operation of the band deformation preventing body 9. In the state where the opening / closing cap 2 is present alone without being fastened to the dispensing portion 20, the band 10 is radiused from the outside of the opening / closing cap 2. The case where the external force which deform | transforms toward a direction inner side acts is shown.

  When an external force acting on the band 10 is applied, in the conventional product shown in FIG. 16, the point where the external force is applied is greatly pushed inward in the radial direction. If it does so, a big stress will generate | occur | produce in the connection piece which has connected the band piece, and a connection piece may be cut | disconnected. On the other hand, if the band deformation prevention body 9 is provided like the opening / closing cap 2 according to the embodiment, even if an external force acts on the band 10, the inner surface of each band piece 11 prevents the band deformation. It is pressed against the outer peripheral surface of the body 9. Thereby, the point where the external force is applied is not pushed further inward in the radial direction. Thereby, the deformation | transformation of the band 10 is suppressed to a fixed limit. If it is a deformation | transformation of the grade shown in this FIG. 6, the excessive stress will not generate | occur | produce in the connection piece 14 which has connected the band pieces 11, and the cutting | disconnection of the connection piece 14 is blocked | prevented effectively.

  FIG. 7 shows one step of the manufacturing method of the opening / closing cap 2.

  The opening / closing cap 2 is integrally formed by injection molding. That is, the mold body includes a cap body 3, a band piece 11 constituting the band 10, connecting pieces 12 and 13 connecting the band pieces 11 to the cap body 3, and a connecting piece connecting the band pieces 11 to each other. Cavities for forming a band deformation preventing body 9 for preventing deformation of the band 14 and the band 10 are formed, and a resin material is injected into these, and each part is injection molded in one step.

  The state immediately after the injection molding is the state shown in FIG. As shown in FIG. 7A, at the stage of injection molding, the band 10 is separated so as to form a predetermined gap between the lower end of the cap body 3 and connected by connecting pieces 12 and 13. The molded product is molded. At the stage of injection molding, the dimension formed between the lower end of the cap body 3 and the upper end of the band 10 is slightly larger than the dimension of the lower end of the band deformation preventing body 9 with respect to the lower end of the cap body 3. Immediately after the injection molding, the band 10 is pushed toward the cap body 3. Thereby, as shown in FIG.7 (b), the connection pieces 12 and 13 are shrunk, the upper end of the band 10 and the lower end of the cap main body 3 are approached, and the clearance gap formed between both is very slight. become. At this time, in a state where the cap body 3 is fastened to the extraction portion 20, the band 10 is sufficiently pushed in so that the lower surface of the band 10 does not interfere with the extraction portion 20.

  The manufacturing method of the opening / closing cap 2 is not limited to the method shown in FIG.

  In the above manufacturing method, the cap body 3 and the band 10 are molded by a single injection to obtain the state shown in FIG. 7A. However, as shown in FIG. 8, only one injection molding machine is used. However, the cap body 3 and the band 10 may be formed in two steps. In the method shown in FIG. 8, only the cap body 3 is injection-molded in the first step (FIG. 8A). Next, the band 10 is injection-molded in the second step (FIG. 8B). Also in this case, the gap formed between the upper end of the band 10 and the lower end of the cap body 3 is arranged at a position where it is larger than the distance between the lower end of the cap body 3 and the lower end of the band deformation preventing body 9. . Thereafter, the band 10 is pushed toward the cap body 3, the connecting pieces 12 and 13 are contracted, and the band 10 is disposed outside the band deformation preventing body 9 (FIG. 8C).

  Moreover, as shown in FIG. 9, you may shape | mold separately the cap main body 3 and the band 10, and may connect these after that. That is, as shown in FIG. 9 (a), the cap body 3 is molded by one injection molding machine, and separately from this, the band 10 is formed by another injection molding machine as shown in FIG. 9 (b). Mold. In this case, the connecting pieces 12 and 13 are formed on either the lower end portion of the cap body 3 or the upper end portion of the band 10 (in the embodiment shown in FIG. 9, the connecting pieces 12 and 13 are provided on the band. ). After injection molding both, the band 10 is connected to the lower end of the cap body 3 as shown in FIG. In the connecting step of both, the band 10 is pushed into the cap body 3 in advance so that the band 10 is positioned outside the band deformation preventing body 9. After the pushing, the cap main body 3 and the band 10 are connected to each other at the connection pieces 12 and 13 by welding, for example, by ultrasonic sealing. When the opening / closing cap 2 is manufactured by this method, the connecting piece is arranged so that the band 10 is arranged at the same position as the band deformation preventing body 9 in the vertical direction only by positioning the band 10 below the cap body 3. 12 and 13 are formed short in advance.

  Furthermore, the opening / closing cap 2 may be manufactured by processing a mold material having a generally shaped shape of the opening / closing cap 2. That is, a base material having a schematic shape of the opening / closing cap 2 is formed by injection molding. This template material includes a portion that can be configured as a cap body 3 and a portion that is configured as a band 10. Such a mold material is machined or laser processed to form the cap body 3 and the band 10 in a state of being connected by the connecting pieces 12 and 13.

  The manufacturing method of the opening / closing cap 2 may be selected from among these manufacturing methods, and the most suitable method for the equipment and the like possessed by itself.

  Next, with reference to FIG.10 and FIG.11, the extraction | pouring part 20 is demonstrated.

  The pouring portion 20 has a cylindrical mouth portion 21 formed at the top and a long and narrow tubular straw portion 28 formed at the bottom. Further, between the mouth portion 21 and the straw portion 28, there are layered pedestals 24, 25, 26 that project horizontally from the outer peripheral portion of the pouring portion 20, and the lower sides of the pedestals 24, 25, 26. And an attachment portion 27 attached to the upper end of the container A is provided.

  The pouring part 20 is attached to the container A with the straw part 28 inserted into the container A. An opening 29 is formed at the lower end of the straw portion 28, and a long hole 30 that communicates the inside and outside of the straw portion 28 is formed at the side surface portion. In addition, the straw portion 28 is provided with a plate-like member 31 projecting to both sides at a portion corresponding to the long hole in the axial direction. When the container A is crushed, the plate-like member 31 secures a passage to the opening 29 and the long hole 30 and allows the contents to enter the straw portion 28.

  The attachment portion 27 is formed flat in the front-rear direction and is formed so as to protrude toward the left and right. The upper portion of the container A is bonded to the outer surface of the mounting portion 27 and is sealed so that no gap is formed between them.

  The pedestals 24, 25, and 26 are formed so as to have three layers in the vertical direction. These pedestals 24, 25, and 26 are respectively formed in an octagonal shape that is horizontally long and protrudes horizontally from the outer peripheral surface of the mouth portion 21 around the mouth portion 21. Note that the lowermost pedestal 26 has its lower surface in contact with the upper edge of the container A, and prevents the extraction portion 20 from falling into the container A during the manufacturing process.

  On the other hand, the mouth portion 21 located at the upper portion of the extraction portion 20 is formed in a cylindrical shape, and a helical male screw 22 is formed on the outer peripheral surface thereof. The male screw 22 meshes with the female screw 5 formed on the inner wall surface of the opening / closing cap 2, and the opening / closing cap 2 is screwed into the opening 21. Thereby, the opening / closing cap 2 is detachably attached to the mouth portion 21.

  A pair of fan-shaped stoppers 23 are formed at the lower end portion of the mouth portion 21 so as to protrude from the outer peripheral surface of the mouth portion 21 to the left and right. The outer edge of each stopper 23 is formed so as to be located inside the outer edge of the base 24. These stoppers 23 are separated from each other at positions corresponding to the front surface portion and the back surface portion of the container A, and both end surfaces thereof are parallel to each other.

  These stoppers 23 are arranged at a position above the upper pedestal 24 by a predetermined distance, and a gap is formed between the stopper 23 and the upper pedestal 24. In this gap, a plurality of ribs 40, 42, 44, 46 extend toward the outer edge of the stopper 23 so as to connect the base 24 and the stopper 23.

  Among these, the pair of ribs 40 are formed so as to extend from the outer peripheral surface of the mouth portion 21 to the left and right, respectively. And the front-end | tip of this rib 40 protrudes toward the radial direction outer side from the outer edge of the stopper 23. FIG. The tip of the rib 40 is a ratchet 41 that engages with the claw portion 15 formed on the band piece 11 of the opening / closing cap 2. The ratchet 41 is disposed on the outer edge of the stopper 23 at a symmetrical position with the mouth portion 21 as an axis, and is slightly inclined toward the side opposite to the opening direction X of the opening / closing cap 2.

  Further, the pair of ribs 42 extend from the intermediate position between the root and the tip of the rib 40 to the peripheral edge of the stopper 23 at a right angle to the rib 40. The ends of the ribs 42 also protrude outward from the outer edge of the stopper 23. This protruding portion also functions as a ratchet 43. These ratchets 43 are also provided at symmetrical positions with the mouth portion 21 as an axis. The ratchet 43 has the rib 42 extending from an intermediate position between the root and the tip of the rib 40 so as to form a right angle with the rib 40, so that it is inevitably on the opposite side to the opening direction X of the opening / closing cap 2. Tilted.

  The ratchets 41 and 43 are arranged so that the ratchet 41 and the ratchet 43 engage with the claw portion 16 simultaneously when the open / close cap 2 that is screwed is loosened.

  Furthermore, between the base 24 and the stopper 23, two pairs of ribs 44 and 46 extend from the outer peripheral surface of the mouth portion 21 toward the outer edge of the stopper 23. These ribs 44 and 46 are located between the rib 40 provided with the ratchet 41 and the end face located in the opening direction X of the opening / closing cap 2 with respect to the rib 40 and in the closing direction Y in which the opening / closing cap 2 is tightened. One is formed between each end face. The ends of the pair of ribs 44 and the ends of the pair of ribs 46 are formed so as to be symmetric with respect to the mouth portion 21.

  Among these, the rib 44 positioned on the end surface side positioned in the opening direction X of the opening / closing cap 2 is positioned in the closing direction Y of the opening / closing cap 2 while its tip surface slightly protrudes from the outer edge of the stopper 23. The leading end surface of the rib 46 positioned between the end surfaces is positioned on the inner side by a predetermined distance from the outer edge of the stopper 23. The front end surface of the rib 44 is a deformation preventing portion 45 that prevents the band pieces 11 from deforming when the band pieces 11 are pushed inward in the radial direction by hand and the protrusions 17 and 18 come into contact with each other. The deformation preventing unit 45 may be provided flush with the outer edge of the stopper 23. The circumferential positional relationship in which the deformation preventing portion which is the tip of the rib 44 is provided is that the ratchet 41 and the claw portion 15 and the ratchet 43 and the claw portion 16 are engaged when the opening / closing cap 2 is loosened. This corresponds to the position immediately before the connection piece 14 is cut. When the opening / closing cap 2 is rotated to a position immediately before the connection piece 14 is cut, the projecting portions 17 and 18 are positioned at a portion facing the deformation preventing portion 45.

  According to the opening / closing cap 2 having the above configuration, the band 10 is protected as follows in a state where the opening / closing cap 2 is sealed in the mouth portion 21.

  As shown in FIG. 12, when the mouth portion 21 of the extraction portion 20 is sealed with the opening / closing cap 2, the band 10 is disposed between the upper pedestal 24 and the contact prevention portion 8. The peripheral edge of the pedestal 24 projects outward in the radial direction from the outer peripheral surface of the band 10, while the outer peripheral edge of the contact preventing portion 8 is formed so as to protrude to substantially the same position as the outer peripheral edge of the band 10 in the radial direction. ing. For this reason, the band 10 disposed between the upper pedestal 24 and the contact prevention unit 8 hardly comes into contact with external foreign matters, and can effectively prevent the external force from acting on the band 10.

  Further, since the connecting pieces 12 and 13 connect the lower end surface of the cap body 3 and the band 10 on the inner surface side of the band 10, the connecting pieces 12 and 13 are connected to the contact preventing portion 8 and the band 10 itself. Protected and reliably prevented contact with external foreign matter. For this reason, in a state where the opening / closing cap 2 is tightened into the extraction portion 20 and the mouth portion 21 is sealed, the connecting pieces 12 and 13 are not cut only by the opening / closing cap 2 coming into contact with an external foreign matter. Effectively prevents tampering.

  Even when a foreign object that is thinner than the gap formed between the lower end of the cap body 3 and the base 24 is pressed against the band 10, the inner side of the band 10 is pressed against the band deformation prevention body 9. Thus, deformation of the band 10 is prevented (see FIG. 6).

  Further, in the opening / closing cap 2, the connecting piece 14 is located near the center in the front-rear direction at the outer edge position of the stopper 23 in a state where the opening / closing cap 2 seals the mouth portion 21. The ratchet 41 and the claw portion 15 and the ratchet 43 and the claw portion 16 are opposed to each other with a very small gap. On the other hand, the deformation prevention portion 45 formed at the tip of the rib 44 and the projections 17 and 18 formed on the band piece 11 also have a slight gap in the circumferential direction between the two in the opening direction X. Located on the rear side. As described above, the plurality of ratchets 41 and 43 are formed in the extraction portion 20, and the claw portions 15 and 16 that engage with the ratchets 41 and 43 are provided on the band 10 of the opening and closing cap 2, so Is suppressed. Further, when the opening / closing cap 2 seals the mouth portion 21, almost no gap is formed between the ratchet 41 and the claw portion 15 and between the ratchet 43 and the claw portion 16. Yes.

  Further, the falsification preventing function itself is exhibited as follows.

  The outer edge of the pedestal 24 provided below the stopper 23 projects greatly to the left and right. And in the range between the deformation | transformation prevention part 45 located in the foremost part in the opening direction X and the nail | claw part 16 located in the last part in the position arrange | positioned at each band piece 11, the outer edge of the base 24 is each band piece. 11 protrudes outward from the outer peripheral surface. For this reason, in the portion where the ratchets 41 and 43 and the claw portions 15 and 16 and the deformation preventing portion 45 and the projections 17 and 18 are located, an object is placed inside the opening / closing cap 2 between the band piece 11 and the base 24. There is no space for entry, and the ratchets 41 and 43 and the claw portions 15 and 16 are concealed by the base 24 and the band piece 11. This effectively prevents the ratchet 41, 43 from being externally crafted to open the opening / closing cap 2.

  Furthermore, while the pouring part 20 is provided with a plurality of ratchets 41 and 43, the opening / closing cap 2 is provided with a plurality of claw parts 15 and 16 on the band piece 11 that engage with them. For this reason, in order to rotate the opening / closing cap 2 without damaging the band piece 11, the connecting pieces 12, 13, and the connecting piece 14, all the ratchets 41, 43 and the claw portions 15, 16 engaged therewith It must be crafted at the same time. However, it is extremely difficult to work on all of the band pieces 11 and the base 24 concealed at the same time. Providing a plurality of ratchets 41 and 43 and claw portions 15 and 16 that engage with these ratchets 41 and 43 also serves to prevent tampering.

  Next, an operation until the opening / closing cap 2 is opened will be described with reference to FIGS.

  First, the opening / closing cap 2 is rotated in the opening direction X that is counterclockwise with respect to the dispensing portion 20. Then, as shown in FIG. 13, the ratchet 41 and the claw portion 15 and the ratchet 43 and the claw portion 16 are engaged with each other. When the opening / closing cap 2 is further rotated in the opening direction X from this state, the claw portions 15 and 16 are hooked on the ratchets 41 and 43, respectively. At this time, a tensile force in the circumferential direction acts on the band 10 and the connecting piece 14 is cut. That is, when the claw portions 15 and 16 of the band piece 11 are engaged with the corresponding ratchets 41 and 43, respectively, a predetermined range of the band piece 11 located on the rear side in the opening direction X with respect to the connection piece 14 is While being prevented from rotating, the portion of the predetermined range located on the front side in the opening direction X is rotated. For this reason, a tensile force acts on the connection piece 14, and as shown in FIG. 14, it is cut | disconnected so that it may isolate | separate in the circumferential direction.

  Each band piece 11 is deformed with the front side in the opening direction X facing downward. Of the connecting pieces 12 and 13 that connect the band piece 11 and the cap body 3, the connecting piece 13 located on the rear side of the opening direction X connects the band piece 11 and the cap body 3 without being cut. On the other hand, a tensile load is applied to the connecting piece 12 having a small thickness and width located on the front side, and the connecting piece 12 is cut.

  Further, when the opening / closing cap 2 is rotated in the opening direction X and the displacement projections 17 and 18 reach the position of the ratchet 43, the displacement projections 17 and 18 get over the ratchet 43. At this time, a twisting force further acts on the band piece 11. As a result, as shown in FIG. 14, the front side of each band piece 11 in the opening direction X of the opening / closing cap 2 is largely displaced downward. In addition, in FIG. 15, the part hidden in the band deformation preventing body 9 is also shown by a solid line for easy viewing.

  Thus, when the band piece 11 of the opening / closing cap 2 is displaced, it can be recognized very easily that the opening / closing cap 2 is in a state after being opened.

The perspective view of the cap unit to which the opening-and-closing cap concerning one Embodiment of this invention is applied. The longitudinal cross-sectional view of an opening-and-closing cap. The figure which shows the positional relationship of the nail | claw part and projection part which were formed in the band of the opening-and-closing cap. The perspective view which shows the positional relationship of a high protrusion part and a low protrusion part. The perspective view which looked at the opening-and-closing cap concerning another embodiment different from the opening-and-closing cap shown in FIGS. 1-4 from the back side. Explanatory drawing which shows the state in which the external force which deform | transforms a band to the radial inside of an opening-and-closing cap acted. The figure which shows the method of manufacturing the opening-and-closing cap by injection-molding a cap main body and a band simultaneously, and pushing a band into a cap main body after that. The figure which shows the method of manufacturing an opening-and-closing cap by the method different from FIG. The figure which shows the method of manufacturing an opening-and-closing cap by another method. The front view of the extraction | pouring part which comprises a spout unit. The figure which shows the shape of the stopper of a extraction | pouring part, a base, the rib formed between these, the shape of the ratchet and deformation | transformation prevention part which were formed in the front-end | tip of a rib, and these positional relationships. The figure which shows the state which the connection piece cut | disconnected. The figure which shows the state which fastened and sealed the opening-and-closing cap to the opening | mouth part of the extraction | pouring part. The figure which shows the state which the nail | claw part of the band piece contact | abutted to the ratchet of the extraction part. The state in which the opening / closing cap is further rotated from the state of FIG. 10 and the connecting piece is cut is shown. The figure which shows the state which rotated further and the connection piece cut | disconnected. The figure which shows the deformation | transformation state of a band when external force acts on the band of the conventional opening-and-closing cap.

Explanation of symbols

1 Cap unit 2, 2A, 2B Open / close cap 3 Cap body 7, 50, 60 Rib 8 Contact prevention part 9, 9A Band deformation prevention body (deformation prevention body)
DESCRIPTION OF SYMBOLS 10 Band 11 Band piece 12, 13 Connection piece 14 Connection piece 15, 16 Claw part 17, 18 Protrusion part 20 Extraction part 21 Mouth part 23 Stopper 40, 42, 44, 46 Rib 41, 43 Ratchet 45 Deformation prevention part

Claims (6)

A cap body that is screwed into the outer peripheral surface of the pouring body of the packaging container to open and close the pouring body, and a band that is provided so as to extend in the circumferential direction of the cap body and is connected to the cap body by a connecting piece. In the opening and closing cap provided,
The band is provided with a portion for separating the band in the circumferential direction at at least one position in the circumferential direction, and the band is connected to each other by a severable connecting piece at this position. On the inside is formed a protrusion that protrudes toward the extraction body,
When the opening / closing cap is rotated in a direction to be opened with respect to the pouring body, the front side of the band sandwiching the connection piece is rotated together with the cap body with respect to the rotation direction. An opening / closing cap configured such that the rear side is prevented from rotating by being caught by a part of the projecting body of the protrusion, and the connecting piece is cut by the stress of the band generated thereby,
The band is located below the cap body and is connected to the lower part of the cap body by the connecting piece,
In addition, a deformation prevention body that prevents the band from being crushed radially inward when the inner side of the band is pressed against the lower end of the cap body is formed on the inner side of the band. Opening and closing cap characterized by that.   The opening / closing cap according to claim 1, wherein the deformation preventing body is formed by intermittently arranging a plurality of protrusions along a circumferential direction on a lower end surface of the cap body.   The open / close cap according to claim 1, wherein the deformation preventing body is an annular body formed to protrude from a lower end of the cap body.   2. The opening / closing cap according to claim 1, wherein the cap body, the deformation preventing body, the band, the connecting piece, and the connecting piece are integrally formed by injection molding.   2. The opening / closing cap according to claim 1, wherein the cap body is provided with a contact prevention portion having at least the same diameter as the outer surface of the band so as to project outward from the outer peripheral surface of the cap body. . A cap body that is screwed into the outer peripheral surface of the pouring body of the packaging container to open and close the pouring body;
A band provided to extend in the circumferential direction of the cap body, and connected to the cap body by a connecting piece;
A deformation preventing body provided at a lower portion of the cap body, the inner side of the band being pressed against the band and the band being prevented from being crushed radially inward;
The band is provided with at least one portion in the circumferential direction for separating the band in the circumferential direction. At this position, the bands are connected to each other with a severable connecting piece, and the cap body is poured out. Due to the stress generated in the band when the protrusion that is rotated relative to the body and protrudes from the inside of the band toward the extraction body with the rotation of the cap body passes over a part of the extraction body , A manufacturing method for an open / close cap configured to cut the connection piece,
Comprising an injection molding step of integrally forming the cap body, the deformation prevention body, the band, the connection piece and the connection piece by injection molding;
In this injection molding process, the band is formed on the cap so that the gap between the upper end of the band and the lower end of the cap body is larger than the dimension between the lower end of the deformation prevention body and the lower end of the cap body. Molded in a state where it is connected to the main body with the connecting piece,
A method of manufacturing an opening / closing cap, comprising: a pressing step of pressing the band toward the cap body after the injection in the injection molding step to position the band on the outer peripheral side of the deformation preventing body. .

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