TW202112620A - Cap, tool, and manufacturing device - Google Patents

Abstract

A cap (100) is provided with: a cap body (111) that has a top plate (121) and a cylindrical skirt (122) provided to the peripheral edge of the top plate (121); a sealing member (112) that is provided in the cap body (111) separately from the cap body (111) so as to face the top plate (121); and a locking part that has a plurality of recesses (135) provided in the circumferential direction of the skirt (122) and recessed radially inward of the cap body (111), that supports the sealing member (112) by the recesses (135), and in which at least one of a primary side in an uncapping direction regarding the circumferential direction of the recesses (135) and the top plate (121) side of the recesses (135) or the tip side of the skirt (122) of the recesses (135) is discontinuous from the skirt (122) but a secondary side in the uncapping direction regarding the circumferential direction of the recesses (135) is continuous from the skirt (122).

Description

Lid, tool and manufacturing device

The present invention relates to a cover with a breathable seam, a tool for manufacturing the cover, and a manufacturing device.

In the past, most of the lids used to seal the mouth of the container were used: the inner surface of the lid body is provided with a resin sealing member that is in close contact with the mouth of the container. In this kind of lid, in order to reduce the opening torque required when the lid is opened (that is, when the lid is twisted), someone has proposed a technical solution that the lid body and the sealing member are not joined together. Please refer to For example: Japan Special Publication No. 2004-217295 and Japan Special Publication No. 2017-178421. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Application Publication No. 2004-217295 [Patent Document 2] Japanese Patent Application Publication No. 2017-178421

[The problem to be solved by the invention]

In the above-mentioned cap, in order to prevent the sealing member from falling out of the cap body, it is conceivable to lock the sealing member in a recessed portion having a breathable slit. However, in order to adequately lock the sealing member, if the recessed portion is provided in a shape that is recessed toward the radially inward direction of the cap body, there is a possibility that cracks will occur at the end of the air-permeable slit.

Therefore, it has been thought that by forming longitudinal slits extending in the axial direction at the ends of the air-permeable slits extending in the circumferential direction, the recesses can be formed in a shape that is deep inward in the radial direction without cracking.

However, if this kind of cover is used, because the cover body and the sealing member are not adhesively joined together, when the cover is opened (twisting the cover), if only the cover body rotates and the sealing member remains stationary, the recess The end of the longitudinal slit will contact the outer periphery of the sealing member, which may cause damage to the sealing member.

Therefore, the object of the present invention is to provide a cover, a tool, and a manufacturing device that can lock the sealing member and prevent the sealing member from being damaged. [Technical means to solve the problem]

One aspect of the lid of the present invention is provided with: a lid body having a top plate portion and a cylindrical skirt portion provided on the peripheral edge of the top plate portion; it is different from the lid body and is opposite to the top plate portion A sealing member provided in the cover body; and provided in the circumferential direction of the skirt portion, having a plurality of concave portions recessed toward the radially inward direction of the cover body, and the plurality of concave portions are used as locking portions To support the sealing member, and the primary side of the recess in the opening direction in the circumferential direction, and at least one of the top plate side of the recess or the front end side of the skirt of the recess is tied to The skirt portion is not continuous, and the secondary side of the tapping direction of the recess in the circumferential direction is continuous with the skirt portion.

A tool of one aspect of the present invention is provided with: a second base, which is provided so as to have a disc-shaped first base disposed in the cylindrical skirt portion of the cover body and formed on the outer peripheral surface The plurality of first protrusions on the first tool are opposed in the radial direction and have an outer peripheral surface with a predetermined curvature so as to be rotatable relative to the first base part; and are provided on the outer peripheral surface of the second base part The plurality of second protrusions can be used to place a part of the skirt on the primary side of the lid body in the direction of opening the cap, the top plate side of the lid body, and at least one of the front end side of the skirt Cut off, and bend the secondary side in the direction of opening the bolt to form a concave portion, which is sequentially arranged on the first tool by using the relative rotation of the first base and the second base. Between adjacent first protrusions.

One aspect of the manufacturing device of the present invention is provided with: a first tool having a disc-shaped first base portion arranged in a cylindrical skirt portion provided in the cover body, and a first base portion formed on the first base portion A plurality of first protrusions on the outer peripheral surface; the second tool, which is provided with: an outer peripheral surface that is arranged to face the first tool in the radial direction and has a predetermined curvature, and can be opposed to the first base The second base of the rotation and the plurality of second protrusions provided on the outer peripheral surface of the second base can place a part of the skirt part on the primary side of the cap body in the direction of opening the cap and the cap At least one of the top plate side of the main body and the front end side of the skirt portion is cut, and the secondary side in the direction of opening the bolt is bent to form a concave portion, using the first base and the second base The relative rotation of the first tool is sequentially arranged between the adjacent first protrusions of the first tool; and a driving device that drives at least one of the first tool and the second tool to rotate . [Effects of Invention]

According to the present invention, it is possible to provide a cover, a tool, and a manufacturing device that can lock the sealing member and prevent the sealing member from being damaged.

1 to 10 are used to describe the cap 100 and the cap 100 manufacturing apparatus 1 according to the first embodiment of the present invention as follows. FIG. 1 is a partially cut-away side view showing the structure of a lid 100 and a tank container 200 provided with the lid 100 according to the first embodiment of the present invention. FIG. 2 is a partially cut-away side view showing the structure of the cover 100. As shown in FIG. FIG. 3 is a cross-sectional view showing the structure of the cover 100 along the line III-III in FIG. 2. 4 is a side view showing the structure of the recess 135 of the skirt portion 122 of the cover 100 and the structure of the ventilation slit 136. As shown in FIG. FIG. 5 is a cross-sectional view showing the structure of the recessed portion 135 of the skirt portion 122 and the ventilation slit 136. FIG. 6 is a schematic plan view showing the structure of the manufacturing apparatus 1 for manufacturing the cover 100. As shown in FIG. FIG. 7 is a perspective view showing the structure of the second protrusion 32 of the second tool 12 used in the manufacturing apparatus 1. FIG. 8 is a plan view showing the structure of the second protrusion 32. FIG. 9 is a side view showing the structure of the second protrusion 32. FIG. 10 is an explanatory diagram showing an example of the evaluation test and the evaluation test result of the cap 100 of the example and the cap of the comparative example manufactured by the manufacturing apparatus 1.

As shown in FIG. 1, the cap 100 is attached to the tank container 200 with a crown. As shown in FIG. 1, the can container 200 here is a so-called "bottle can type container" for storing beverages and the like. For example, the can container 200 is composed of a metal material such as an aluminum alloy with a resin film laminated on both sides or a steel plate with a surface treatment. The tank container 200 is formed into a cylindrical shape with a different outer diameter in which one of the ends is reduced in diameter. The can container 200 has a mouth 210 for discharging the contained beverage at one of its ends. The outer peripheral surface of the mouth portion 210 has a jaw portion 211, a male screw portion 212, and a curling portion 213 in this order from the bottom surface side of the tank container 200 toward the end.

The jaw 211 is configured by a part of the mouth 210 protruding in a ring shape. The outer diameter of the crimped portion 213 is smaller than the male threaded portion 212. In addition, the curled portion 213 is also smaller than the inner diameter of the cover 100. The curled portion 213 is formed by bending the end of the mouth portion 210 once or more. The curling part 213 constitutes an opening for discharging the beverage contained in the can container 200.

As shown in FIGS. 1 to 3, the cover 100 is provided with a cover body 111 and another sealing member 112 which is separately provided in the cover body 111.

The cover body 111 is made of a material in which a resin coating layer is formed on a metal material such as aluminum alloy. The cover body 111 is formed into a cup shape by drawing and forming the thin flat material.

The cover body 111 is provided with a disk-shaped top plate portion 121 and a cylindrical skirt portion 122 hanging down from the peripheral edge of the top plate portion 121. The cover body 111 is formed by continuously integrating the top plate portion 121 and the skirt portion 122 with a circular and curved corner portion 123.

The top plate 121 is formed in a disc shape. One end of the skirt portion 122 is connected to the top plate portion 121 via the corner portion 123, and the other end forms an opening. As shown in FIGS. 1 to 5, the skirt portion 122 includes a knurled portion 131, a female thread portion 132, and a tamper-proof portion in the range from the end on the top plate portion 121 side to the end where the opening is formed. Belt 133.

The knurled part 131, the female threaded part 132 and the tamper-proof belt part 133 are connected to the top plate 121 and the cylindrical shape that has not yet been formed with the knurled part 131, the female threaded part 132 and the tamper-proof belt part 133. The cup-shaped molded product 111A composed of the skirt portion 122 and the corner portion 123 is formed by processing such as knurling and roll forming.

The knurled part 131 has a plurality of recesses 135. The recess 135 protrudes inward from the inner peripheral surface of the skirt 122. The recess 135 is provided with an air-permeable slit 136, and the air-permeable slit 136 is provided at the end of the skirt 122 from the recess 135 on the top plate 121 side of the skirt 122 in the axial direction or the recess 135 in the skirt One of the opening and ending recesses 135 of the ends of the portion 122 on the front end side of the opening is between the ends of the skirt portion 122 on the primary side (upstream side) in the tapping direction in the circumferential direction. That is, the recessed portion 135 on the top plate portion 121 side or one side of the open front end side of the skirt portion 122, and the primary side of the recessed portion 135 in the opening direction is non-continuous with the skirt portion 122 (not continuous together). ), and the recess 135 is on the top plate 121 side or the other side of the front end side of the skirt 122, and the recess 135 is continuous with the skirt 122 on the secondary side (downstream side) in the opening direction. ). The plurality of recesses 135 formed with the air-permeable slits 136 constitute a locking portion for locking the movement of the sealing member 112. In this embodiment, it is aimed at: the recess 135 at the end of the top plate 121 side and the structure with the ventilation slit 136 on the primary side of the opening direction of the skirt 122 (that is, the direction when the lid is twisted) To explain.

As a specific example, as shown in FIGS. 3 to 5, the end portion 135a of the recess 135 on the top plate portion 121 side in the axial direction is formed discontinuously with the skirt portion 122 by using a part of the ventilation slit 136, but It is located at a position closer to the radially inner side of the skirt part 122 than the inner peripheral surface of the skirt part 122. The first end 135b of the recess 135 on the primary side in the unplugging direction is formed discontinuously with the skirt 122 by a part of the air-permeable slit 136. The second end 135c of the recessed portion 135 on the secondary side (downstream side) in the unplugging direction is a bent portion after a part of the skirt portion 122 is bent, and therefore is continuous with the skirt portion 122. The second end 135c is inclined or curved from the end 135a toward the open end (front end) side of the skirt 122, for example. For example, the second end 135c is curved from the end 135a toward the front end of the skirt 122 so that the width of the recess 135 in the opening direction gradually becomes smaller.

As shown in FIGS. 1 to 5, the air-permeable slit 136 is a slit for discharging the gas in the tank container 200 when the stopper is opened. As shown in FIGS. 4 and 5, the ventilation slit 136 includes a transverse cut portion 136 a extending along the circumferential direction of the skirt portion 122 and a vertical cut portion 136 b extending along the axial direction of the skirt portion 122. The transverse cut portion 136a is formed at the end portion of the recessed portion 135 on the top plate portion 121 side of the skirt portion 122. The longitudinal cutting portion 136b is formed at the first end portion 135b of the recessed portion 135 on the upstream side (primary side) of the skirt portion 122 in the opening direction. For example, the longitudinal cutting portion 136b extends along the axial direction of the skirt portion 122.

The air-permeable slit 136 can be used to lock the sealing member 112 by a plurality of recesses 135. Therefore, the end of the air-permeable slit 136 on the front end side of the skirt 122 is compared with the end of the air-permeable slit 136 on the top plate 121 side. The part further protrudes toward the radially inward direction of the cover 100.

As shown in FIG. 1, the female threaded portion 132 is provided so as to be capable of screwing with the male threaded portion 212 of the tank container 200. The female screw portion 132 is formed simultaneously with the tank container 200. That is, the female threaded portion 132 is not formed yet in the state of the finished product of the lid 100 before being attached to the tank container 200, but is formed when it is integrated with the tank container 200.

As shown in FIGS. 1 and 2, the tamper-proof band 133 is tied in the direction in which the lid 100 is separated from the tank container 200 and in the axial direction of the lid 100, and is engaged with the jaw 211 of the tank container 200. In addition, the tamper-proof belt portion 133 has a twisted-off portion 133a that will break when the lid 100 is opened to allow the tamper-proof belt portion 133 to be separated from the skirt portion 122. That is, the tamper-proof belt portion 133 is formed by forming slits on the end side of the skirt portion 122 with only a plurality of twisted portions 133a remaining, and is similar to the female thread portion 132, All of them are formed into the same shape as the jaw 211 of the can container 200 when they are integrated with the can container 200, and thus are engaged with the jaw 211. The torsion part 133a is a weakened part that can be twisted as long as a predetermined force is used.

As shown in FIG. 2, the sealing member 112 is made as an individual different from the cover body 111. As shown in Figures 2 and 3, the sealing member 112 is in the shape of a circular plate, and its outer diameter is larger than the inner connection of the end 135a of the plurality of recesses 135 with the air-permeable slits 136 provided in the skirt 122 of the cover body 111 The diameter of the circle. In this way, the plurality of recesses 135 use the end 135a on the side of the transverse cut portion 136a of the ventilation slit 136 to lock the sealing member 112 to the cover body 111 in a non-adhesive manner. Therefore, the sealing member 112 is held by the ends of the plurality of recesses 135 in the cover body 111. Therefore, although the sealing member 112 is not adhered to the cover body 111, it is formed integrally with the cover body 111.

As shown in FIGS. 1 and 2, the sealing member 112 includes a disk-shaped sliding layer 141 and a disk-shaped sealing layer 142 integrally laminated on the sliding layer 141. The sliding layer 141 and the sealing layer 142 of the sealing member 112 are formed of different synthetic resins. The sealing layer 142 of the sealing member 112 is integrally laminated on the sliding layer 141. As shown in FIG. 2, for example, the sealing member 112 has a flat plate portion 112a of the same thickness, a curved surface portion 112b formed of a curved surface on the outer peripheral edge of the top plate portion 121 side, and a flat plate portion 112a and The thick piece portion 112c between the curved portions 112b and the thickness is greater than that of the flat portion 112a. In other words, the sealing member 112 is formed in a disc shape, and the ridge portion on the top plate portion 121 side is formed of a curved surface with a predetermined curvature. In addition, the sealing member 112 may be manufactured, for example, as shown in FIG. For example, the thickness of the sealing layer 142 at the thick piece portion 112c is made larger than the thickness of the sealing layer 142 at the center side of the sealing member 112, that is, at the flat plate portion 112a.

The sliding layer 141 is made of a relatively harder resin material than the sealing layer 142. In addition, the sliding layer 141 is composed of a resin material that does not have adhesiveness and adhesion to the resin coating layer of the cover body 111. That is, the sliding layer 141 is not adhered and fixed to the top plate part 121, but slides on the top plate part 121 in a state of being in contact with the top plate part 121.

Examples of resin materials used for the sliding layer 141 include olefin resins such as polypropylene resins and polyethylene resins; polyester resins such as polyethylene terephthalic acid; styrene resins; acrylic resins. In this embodiment, the sliding layer 141 is made of, for example, polypropylene resin. In addition, pigments, lubricants, softeners, etc. may be appropriately added to the resin material used for the sliding layer 141. In addition, in the example given in the present embodiment, the hardness of the sliding layer 141 uses a durometer D hardness established in accordance with the Japanese Industrial Standards JIS-K7215, which is D10 to D70.

As shown in FIG. 1 and FIG. 2, the sliding layer 141 is provided so as to face the top plate 121 of the cover body 111 and is a separate entity from the cover body 111. The sliding layer 141 is made to be slidable on the top plate 121 of the cover body 111 according to the resin material used. The sliding layer 141 is formed into a circular plate shape. The outer diameter of the sliding layer 141 is made smaller than the inner diameter of the skirt 122, and is made approximately the same diameter as the inscribed circle of the knurled portion 131 or slightly smaller than the inner diameter of the inscribed circle, but larger than the mouth. The outer diameter of the crimped portion 213 of 210.

The sealing layer 142 is made of a relatively softer resin material whose hardness is lower than that of the sliding layer 141. The resin material used for the sealing layer 142 includes: olefin resin, polyester resin, styrene resin, acrylic resin, etc. More suitable resin materials include: styrene elastomer and Mixed material of polypropylene resin, mixed material of low-density polyethylene and styrene-based elastomer, polyester-based elastomer, etc. The resin material used for the sealing layer 142 has adhesive properties that can be bonded to the resin material used for the sliding layer 141. In this embodiment, the sealing layer 142 is composed of, for example, a mixed material of a styrene-based elastomer and a polypropylene resin. In addition, pigments, lubricants, softeners, etc. may be appropriately added to the resin material used for the sealing layer 142.

The sealing layer 142 is integrally provided on the main surface of the sliding layer 141 on the side facing the mouth 210. The sealing layer 142 is formed into a disc shape. The outer diameter of the sealing layer 142 is made: smaller than the inner diameter of the skirt portion 122, and approximately the same diameter as the inscribed circle of the knurled portion 131 or slightly larger than the inscribed circle, and larger than the curled portion of the mouth 210 The outer diameter of 213. That is, the outer diameter of the sealing layer 142 is made the same as the outer diameter of the sliding layer 141 or larger than the outer diameter of the sliding layer 141.

The capping method of capping the lid 100 with this structure to the mouth 210 of the can container 200, for example, is to connect the front end of the mouth 210 of the can container 200, that is, the sealing layer of the crimping portion 213 and the sealing member 112 142 puts the lid 100 on the mouth 210 of the can container 200 in a way that they are in contact with each other. In this state, a load is applied to the top plate portion 121 of the lid body 111, the corner portion 123 is drawn downward (the tank container 200), and the skirt portion 122 is roll-formed. In this way, as shown in FIG. 1, a female thread portion 132 will be formed on the skirt portion 122 of the lid 100, and the lid 100 will be screwed and fixed to the mouth 210 of the can container 200. In addition, this capping method is performed in a state where the can container 200 is already filled with beverage. Also, for example, the tank container 200 that has been closed by the lid 100 is subjected to, for example, a retort sterilization treatment.

Next, the method of opening the cap (twisting the cap) of the cap 100 of this structure will be described. First, when opening the cap 100, the user holds the cap body 111 and rotates the cap body 111 toward the unplugging direction indicated by the arrows in FIGS. 1 to 4. Then, the female thread portion 132 of the skirt portion 122 of the cover body 111 will move along the male thread portion 212 of the mouth 210. Therefore, as the rotation angle of the cover body 111 increases, the cover body 111 will move toward It moves in the axial direction and leaves the mouth 210.

When the sealing member 112 is not closely attached to the mouth 210, the sealing member 112 is locked at the end 135a on the top plate 121 side of the plurality of recesses 135 of the cover body 111, and the sealing member 112 is held on the skirt Section 122 in the axial direction. Thus, when the cover body 111 is separated from the mouth 210, the sealing member 112 is also separated from the mouth 210. If the internal pressure in the tank container 200 is higher than the high pressure, the gas in the tank container 200 will be discharged to the outside through the air-permeable slit 136 of the recess 135.

In addition, when the sealing member 112 is in close contact with the mouth 210, the sealing member 112 is locked at the end 135a on the top plate 121 side of the plurality of recesses 135 of the cover body 111. Therefore, the sealing member 112 is blocked It is held in the axial direction of the skirt 122. Therefore, the recess 135 of the cover body 111 applies force to the sealing member 112 in the direction of peeling from the mouth 210, and the sealing member 112 is peeled from the cover body 111. As a result, the cover body 111 and the sealing member 112 are Separate from the mouth 210.

In addition, when the sealing member 112 is closely attached to the mouth 210, the recess 135 of the cover body 111 may contact the outer periphery of the sealing member 112 in the direction of opening the cap. However, because the first end 135b of the recess 135 is located on the primary side (upstream side) in the opening direction, and the second end 135c of the recess 135 is located on the secondary side (downstream side) in the opening direction, the opening is performed. When the cap body 111 is rotated by the cap, the second end 135c is the front end in the cap opening direction, and the first end 135b is the rear end in the cap opening direction.

Therefore, when the sealing member 112 is in close contact with the mouth 210, the cover body 111 is rotated in the opening direction, and the recess 135 contacts the outer periphery of the sealing member 112 in the opening direction, the recess 135 is The second end portion 135 c that is continuous with the skirt portion 122 contacts the outer peripheral edge of the sealing member 112. That is, the concave portion 135 is the inner surface of the curved or inclined second end portion 135c that contacts the outer peripheral edge of the sealing member 112. Therefore, it is possible to suppress excessive stress on the outer peripheral edge of the sealing member 112 and also The cover body 111 can be separated from the mouth 210.

According to the cover 100 of this structure, in the circumferential direction of the skirt 122, the first end 135b on one side of the recess 135 and the skirt 122 are kept discontinuous, and the other side of the recess 135 is discontinuous. The second end 135c is continuous with the skirt 122. In this way, even if the depth of the recessed portion 135 from the outer peripheral surface of the skirt portion 122 is increased, in other words, even if the height protruding inward from the inner peripheral surface of the skirt portion 122 is increased, the occurrence of part of the recessed portion 135 can be suppressed. The phenomenon of fracture. Therefore, the inner diameter of the inscribed circle of the ends 135a of the plurality of recesses 135 can be sufficiently smaller than the outer diameter of the sealing member 112, and the sealing member 112 can be locked more reliably by the plurality of recesses 135. Therefore, the cover body 111 can use a plurality of recesses 135 to prevent the sealing member 112 from falling off from the cover body 111.

In the recess 135, the first end 135b that is not continuous with the skirt 122 is arranged on the primary side of the cap body 111 in the opening direction, and the second end 135c, which is continuous with the skirt 122, is arranged on the lid. The secondary side of the main body 111 in the opening direction. Therefore, when the cap body 111 is rotated in the unplugging direction to bring the recess 135 into contact with the outer periphery of the sealing member 112, first the second end 135c of the recess 135 comes into contact with the outer periphery of the sealing member 112. The second end 135c is continuous with the skirt 122, and the inner surface is curved, so it is in surface contact with the sealing member 112, and the inclined or curved surface is used to gradually increase the contact. field. Therefore, when the second end 135c comes into contact with the outer periphery of the sealing member 112 first, compared with the case where the first end 135b comes into contact with the outer periphery of the sealing member 112 first, the applied pressure can be reduced. The stress on the outer periphery of the sealing member 112. In addition, because of the longitudinal cut portion 136b, the end surface of the first end 135b is in the shape of a cutting edge, and therefore, compared with the case where the first end 135b is in contact with this cutting edge, it is still the same as the second end. When the 135c is in contact, the outer periphery of the sealing member 112 is relatively unlikely to be damaged. Therefore, even when the cap 100 is unplugged and the sealing member 112 comes into contact with the recess 135, the second end 135c can be used to reduce damage to the outer periphery of the sealing member 112.

In addition, one end of the recess 135 (the second end 135c) is inclined or bent toward the skirt 122. Therefore, when the sealing member 112 is inserted into the cover body 111, it can be used to guide the sealing member 112. Insertion direction. Therefore, even if the plurality of recesses 135 can be used to lock the sealing member 112 and the height of the recess 135 protruding from the inner peripheral surface of the skirt portion 122 is set to be large, the insertability of the sealing member 112 when inserted into the cover body 111 can be suppressed. Of getting worse.

Next, the manufacturing apparatus 1 for forming the knurled portion 131 having a plurality of recesses 135 to the skirt portion 122 of the cover body 111 (molded product 111A) will be described with reference to FIGS. 6 to 9.

As shown in FIG. 6, the manufacturing apparatus 1 includes a first tool 11, a second tool 12, and a driving device 13. The manufacturing device 1 is a device for knurling the skirt portion 122 of the cover body 111, and forming a plurality of recesses 135 with ventilation slits 136 on the skirt portion 122. The manufacturing device 1, for example, uses the driving device 13 to make the first tool 11 and the second tool 12 relatively rotate, and a part of the skirt 122 between the first tool 11 and the second tool 12 is formed. Recess 135.

The first tool 11 includes a first base 21, a plurality of first protrusions 22, and a rotating shaft 23 provided on the first base 21. The first base 21 and the plurality of first protrusions 22 of the first tool 11 are arranged in the cover body 111.

The first base 21 is arranged in the skirt 122 of the cover body 111. The first base 21 has a disc shape, and its outer diameter is smaller than the inner diameter of the skirt 122. The first base 21 has, for example, a hole 21a into which the rotating shaft 23 can be inserted. The hole 21a has, for example, a key groove.

The first protrusion 22 has, for example, a semi-cylindrical shape, and its axial direction is along the axial direction of the first base 21. The plurality of first protrusions 22 have first protrusions 22 arranged adjacently at predetermined intervals in the circumferential direction. The "predetermined interval" referred to here is set to a width larger than the width of the second protrusion 32 of the second tool 12 in the circumferential direction, which will be described later. The rotating shaft 23 is fixed to the first base 21.

The second tool is a tool for forming the recess 135 and the ventilation slit 136 on the skirt 122. As shown in FIGS. 6 to 9, the second tool 12 includes a second base 31 and a plurality of second protrusions 32. The second base 31 is, for example, in the shape of a disc. The outer diameter of the second base portion 31 is set to be larger than the outer diameter of the first base portion 21 and the outer diameter of the skirt portion 122, for example. In addition, the second base 31 only needs to have a structure that can form the concave portion 135 and the air-permeable slit 136 together with the first tool 11 to form the outer peripheral surface of the appropriate curvature. It does not have to be a disc shape, but may be Quarter circle, semicircle, or arc. In addition, the second base 31 may be provided so as to be rotatable, and if the first base 21 is provided so as to be rotatable, the second base 31 may be provided so as not to be rotatable.

The second protrusion 32 is used to shape the recess 135 with the air-permeable slit 136 in the skirt portion 122. As shown in FIGS. 7 and 9, for example, in the axial direction, one end surface 32a of the second protrusion 32 is in the shape of a plane orthogonal to the axial direction, and the other end surface 32b is formed in the axial direction of the front end. The thickness tends to be the smallest in the form of an inclined surface that is inclined with respect to the axis direction. In addition, as shown in FIGS. 7 and 8, the second protrusion 32 has a first processed portion formed on one side of the second base portion 31 in the circumferential direction for forming the first end portion 135b of the recessed portion 135 32c and, formed on the other side in the circumferential direction of the second base 31, are used to form the second processed portion 32d of the second end 135c of the recess 135.

One end surface 32a of the second protrusion 32 is used to form a cross-cut portion 136a of the ventilation slit 136 in the skirt portion 122. The other end surface 32 b of the second protrusion 32 is used for bending the skirt portion 122 to form a recess 135 other than the air slit 136. The first processed portion 32c side of the other end surface 32b is flat, for example, and the second processed portion 32d side of the other end surface 32b is curved, for example. In addition, one end surface 32a and the other end surface 32b of the second protrusion 32 are arranged on the second base 31 in the axial direction of the second base 31 in accordance with the position of the transverse cut portion 136a of the air-permeable slit 136 relative to the recess 135. On one end of the protrusion 32.

The end surface of the first processed portion 32c in the circumferential direction is flat. The first processed portion 32c is inclined toward the center of the second protrusion 32 in the circumferential direction, for example. The first processed portion 32c uses the side surface 32c1 in the circumferential direction to form the first end portion 135b of the recess 135 in the skirt portion 122, that is, the longitudinal cut portion 136b of the ventilation slit 136. The first processed portion 32c is used to form the first end portion 135b of the primary side of the recess 135 in the unplugging direction in the skirt portion 122.

The second processed portion 32d is gradually reduced in width from the second base portion 31 side toward the front end in the circumferential direction, so that the end in the circumferential direction is inclined or curved in the axial direction. In this embodiment, the description will be given by taking an example in which the end surface of the second processed portion 32d in the circumferential direction is a curved surface. When viewed from the plan direction shown in FIG. 8, the front end of the second processed portion 32d has a quarter-circle shape. The side surface 32d1 of the second processed portion 32d in the circumferential direction is used for bending the skirt portion 122, and a part of the curved portion of the concave portion 135 is formed as the second end 135c. The second processed portion 32d is used to form the second end portion 135c of the recess 135 on the secondary side in the plug opening direction in the skirt portion 122.

The driving device 13 is a driving source for making the first tool 11 and the second tool 12 relatively rotate. The driving device 13 is used to rotate the rotating shaft 23, for example. The driving device 13 is, for example, a motor or a transmission mechanism that transmits the rotation of the motor to the rotating shaft 23. The driving device 13 rotates the first tool 11 in a certain direction. For example, as shown by the arrow in FIG. 6, the driving device 13 rotates the first tool 11 in the same direction as the opening direction of the cap 100.

In addition, the driving device 13 may be a device capable of relatively rotating the first tool 11 and the second tool 12, and does not necessarily need to rotate the first base 21 via the rotation shaft 23 of the first tool 11. A device that rotates only the second base portion 31 of the second tool 12 may also be used, or it may be a device that rotates both the first base portion 21 and the second base portion 31. In addition, for example, the driving device 13 may also be provided so as to be able to perform the operation on the cap body 111 in the initial position when the cap body 111 is arranged on the first tool 11 and in a predetermined positional relationship with the first tool 11 and the second tool 12 Move between forming positions for forming processing.

The manufacturing apparatus 1 having such a structure is connected to the first tool 11 and the second tool 11 in a state where the cap body 111 is arranged on the first tool 11 and the first tool 11 and the second tool 12 are in a predetermined positional relationship. 12 Perform a relative rotation. At this time, because the diameter of the circumscribed circle of the first base 21 of the first tool 11 and the plurality of first protrusions 22 is smaller than the inner diameter of the skirt 122, the center of the cover body 111 is eccentric to the center of rotation of the rotating shaft 23 Therefore, a part of the skirt 122 is pressed toward the second tool 12.

If the first tool 11 and the second tool 12 are in the predetermined rotation positions, as shown in FIG. 6, one of the second protrusions 32 of the second tool 12 will be located on two adjacent ones of the first tool 11. Between the first protrusions 22. And at this time, a part of the skirt 122 will be bitten between two adjacent first protrusions 22 and a second protrusion 32 of the second tool 12.

Therefore, two adjacent first protrusions 22 and a part of the inner peripheral surface of the skirt portion 122 will be closely attached to each other, and at the same time, a part of the outer peripheral surface of the skirt portion 122 is affected by the second protrusion 32. extrusion. In this way, the second protrusion 32 can be used to form the air-permeable slit 136 in the skirt portion 122, and the recessed portion 135 other than the air-permeable slit 136 can be bent. Then, in order to form the knurled portion 131 on the skirt portion 122, the skirt portion 122 is rotated once, and then a plurality of recesses 135 with ventilation slits 136 can be formed in the skirt portion 122.

According to this manufacturing device 1, the second protrusion 32 of the second tool 12 can be used to process and shape the ventilation slit 136 having the horizontal cut portion 136a and the vertical cut portion 136b, and bend to form the recess 135. . In this way, the manufacturing device 1 can easily form the recess 135 in the skirt 122, and can reduce the pressure and stress applied to the recess 135 when the recess 135 is formed. Therefore, the manufacturing apparatus 1 can prevent the occurrence of accidental cracks such as cracks and burrs caused by the cracks at the end of the recess 135 by the second tool 12. Therefore, the manufacturing apparatus 1 can increase the bending amount of the recess 135, and can form a recess 135 of a size and shape that can securely lock the sealing member 112 in the skirt portion 122. That is, the cover 100 manufactured by the manufacturing device 1 can achieve the same effect as the above-mentioned cover 100.

In addition, the manufacturing apparatus 1 sets the opening direction of the cap 100 and the relative rotation direction of the first tool 11 and the second tool 12 to the same direction. In this way, the second processed portion 32d of the second protrusion 32 will first abut against the skirt portion 122 to form the cross-cut portion 136a of the ventilation seam 136, and it will start from the second end 135c of the recess 135. Side to be bent. Then, as the cover body 111 continues to rotate, the forming process of the transverse cut portion 136a and the bending process of the concave portion 135 are sequentially performed, and the longitudinal cut portion 136b is formed in the final stage of the forming process of the concave portion 135. .

Therefore, the manufacturing apparatus 1 can cut only the skirt part 122 on the side where the second protrusion 32 penetrates the skirt part 122 along the axial direction. That is, the manufacturing device 1 uses the second processed portion 32d having the curved side surface 32d1 at the beginning of the forming of the recessed portion 135, and the recessed portion is first formed from the side of the second end portion 135c with less deformation. 135 is bent at the front end side of the skirt 122 and bent at the second end 135c. In addition, the manufacturing device 1 uses the first processed portion 32 c to perform the longitudinal cut portion 136 b of the air-permeable seam 136 when the skirt portion 122 performs the forming process of the recess 135.

Therefore, when the manufacturing apparatus 1 performs the forming of the recessed portion 135, the skirt 122 generates the greatest tensile deformation, and when the recessed portion 135 generates the greatest stress, the longitudinal cut portion 136b is formed. In this way, The stress and pressure imposed on the skirt 122 during the forming of the recess 135 are reduced. In this way, the manufacturing device 1 sets the cap 100 opening direction and the relative rotation direction of the first tool 11 and the second tool 12 to the same direction. In this way, it can be more suitable to prevent the recess 135 Unexpected cracks and burrs from the ends of the cracks.

In addition, since the generation of burrs in the recess 135 can be prevented, problems caused by burrs can be prevented. For example, the burrs can be prevented from peeling off and invading into the tank container 200, and when the sealing member 112 is inserted into the lid body 111, it can be prevented. The sealing member 112 is damaged.

As described above, according to one of the embodiments of the present invention, the cap 100 and the manufacturing apparatus 1 having the second tool 12 can not only lock the sealing member 112 but also prevent the sealing member 112 from being damaged.

Next, FIG. 10 is used to describe the evaluation test and the evaluation result for the cap 100 having such a structure and the characteristics of the manufacturing device 1.

In this evaluation test, the cap 100 of the present embodiment was used for the example in which the recess 135 was formed by the manufacturing device 1 and the cap 100 of Comparative Examples 1 to 3. In addition, in FIG. 10, the three-dimensional model of the second protrusion of the embodiment and each comparative example, the shape in plan and side view, and the inscribed circle of the plurality of recesses of the conventional lid as a reference are shown respectively. The difference between the diameter and the diameter of the inscribed circle of the plurality of recesses in the target example and each comparative example, the plan view of the manufacturing apparatus, and the state of the recess after forming. In addition, in the Examples and Comparative Examples 1 to 3, the same manufacturing apparatus 1 and cap body 111 were used except for the difference in the shape of the second protrusion.

In the evaluation test, a recess is formed in the skirt portion 122 of the cover body 111 first, and then the formed recess is confirmed to determine whether there are unexpected cracks in the recess other than the air-permeable seam. In addition, the examples and comparative examples adopt the following structures.

(Example) The shape of the second protrusion 32 of the embodiment is the same shape as that of the second protrusion 32 of the second tool 12 of the above-mentioned embodiment. In addition, the diameter of the inscribed circle of the plurality of recesses 135 formed by the second protrusion 32 of the first embodiment is set to be 0.4 smaller than the diameter of the inscribed circle of the plurality of recesses of the conventional cap. mm. That is, the height of one recess 135 from the inner peripheral surface of the skirt 122 is set to be 0.2 mm higher than the recess of the conventional lid.

(Comparative example 1) Regarding the shape of the second protrusion of Comparative Example 1, one end surface of the second protrusion is used to form the horizontal cut portion 136a of the vent slit 136 in the skirt portion 122, and the other end surface of the second protrusion is It is curved with a predetermined radius of curvature and inclined toward the tip of the second protrusion. In addition, the second protrusion of Comparative Example 1 is not used to form the longitudinal cut portion 136b of the air-permeable slit 136. In addition, the second protrusion is inclined at a predetermined angle from the outer peripheral surface of the second base portion 31, and its width in the circumferential direction gradually decreases toward the tip, and the tip has a semicircular shape forming a predetermined radius of curvature.

In addition, the diameter of the inscribed circle of the plurality of recesses 135 formed by the second protrusion of Comparative Example 1 was set to be 0.1 mm smaller than the diameter of the inscribed circle of the plurality of recesses of the conventional cap. That is, the height of one recess from the inner peripheral surface of the skirt 122 is set to be 0.05 mm higher than the recess of the conventional lid.

(Comparative example 2) Regarding the shape of the second protrusion of Comparative Example 2, one end surface of the second protrusion is used to form the horizontal cut portion 136a of the air slit 136 in the skirt portion 122, and the other end surface of the second protrusion is It is flat and inclined toward the tip of the second protrusion. In addition, the second protrusion of Comparative Example 2 uses both ends in the circumferential direction to form the longitudinal cut portion 136b of the air-permeable slit 136. In addition, the second protrusion is inclined at a predetermined angle from the outer peripheral surface of the second base 31, and its width in the circumferential direction gradually decreases toward the front end. The front end is along the second base 31 on the outer peripheral surface. Extend in the tangential direction.

In addition, the diameter of the inscribed circle of the plurality of recesses 135 formed by the second protrusion of Comparative Example 2 was set to be 0.3 mm smaller than the diameter of the inscribed circle of the plurality of recesses of the conventional cap. That is, the height of one recess from the inner peripheral surface of the skirt 122 is set to be 0.15 mm higher than the recess of the conventional lid.

(Comparative example 3) Regarding the shape of the second protrusion of Comparative Example 3, one end surface of the second protrusion is used to form the horizontal cut portion 136a of the vent slit 136 in the skirt portion 122, and the other end surface of the second protrusion is It is flat and inclined toward the tip of the second protrusion. In addition, the second protrusion of Comparative Example 3 uses both ends in the circumferential direction to form the longitudinal cut portion 136b of the air-permeable slit 136. In addition, the width of the second protrusion in the circumferential direction is kept constant from the outer peripheral surface of the second base portion 31 toward the front end.

In addition, the diameter of the inscribed circle of the plurality of recesses 135 formed by the second protrusion of Comparative Example 3 was set to be 0.2 mm larger than the diameter of the inscribed circle of the plurality of recesses of the conventional cap. That is, the height of one recess from the inner peripheral surface of the skirt 122 is set to be 0.10 mm lower than the recess of the conventional lid.

(Comparison test results) As shown in FIG. 10, in the recesses of Comparative Example 1 to Comparative Example 3, cracks other than the air-permeable slit were generated in the recesses. In contrast, in the recess 135 of the embodiment, no cracks other than the air-permeable seam 136 are generated. Compared with the comparative examples, although the height of the recesses from the inner peripheral surface of the skirt 122 is deliberately set higher in the examples, it can be seen from this result that the recesses are from the inner circumference of the skirt 122 The height of the surface is not directly related to the cracking. In addition, although the structure of the air-permeable seams of Comparative Example 2 and Comparative Example 3 is provided with two longitudinal cut parts, cracks still occur. It can be seen that simply providing the longitudinal cut part cannot prevent Cracks occurred in the recesses.

As can be seen from the above-mentioned circumstances, according to the cap 100 and the manufacturing apparatus 1 of the present embodiment, in order to be able to lock the sealing member 112, the inner diameters of the inscribed circles of the plurality of recesses 135 are set to be relatively larger. The inner diameter of the inscribed circle of the plurality of recesses of the conventional lid is smaller, which can still prevent damage and burrs such as cracks in the recesses.

In addition, the present invention is not limited to the above-mentioned embodiment. For example: as shown in Fig. 11 and Fig. 12, the cover 100 may also be formed with a plurality of recesses 135 with breathable slits 136 on the knurled portion 131, and a plurality of recesses 135 such as 3 or 4 without The second recess 137 of the ventilation slit 136. Such a plurality of second recesses 137 can be used in common with the plurality of recesses 135 or separated from the plurality of recesses 135 to lock the sealing member 112. In addition, as shown in FIG. 11, such a second recess 137 may be arranged closer to the top plate 121 than the plurality of recesses 135 in the axial direction of the skirt 122.

In addition, the number of recesses 135 and the opening area of the vent slit 136 can be adapted to various factors such as the shape of the lid 100, the can container 200, the contents contained in the can container 200, and the internal pressure in the can container 200. Settings. In addition, the sealing member 112 used in the lid 100 is not adhered to the lid body 111, and can be appropriately set as long as it is a member that can seal the mouth 210 of the can container 200.

In addition, in the above-mentioned example, the concave portion 135 has been described as having the ventilation slit 136 at the end on the top plate portion 121 side and at the end on the primary side of the skirt portion 122 in the opening direction. But it is not limited to this. For example, the structure of the recess 135 may be such that the front end of the skirt 122 in the axial direction of the skirt 122 and the end of the primary side in the opening direction in the circumferential direction of the skirt 122 may have ventilation slits. 136. In this way, the vertical cutting portion 136b is formed: extending from the horizontal cutting portion 136a to the top plate 121 side, and the horizontal cutting portion 136a is formed with a recess 135 on the top plate 121 side, so it is recessed toward the radially inward direction. The wall surface of the recess 135 locks the sealing member 112. In addition, of course, it is also possible to form such a recess 135 by appropriately changing the shape of the second tool 12. In addition, the transverse cutting portion 136a may be formed on both sides of the top plate portion 121 side of the recessed portion 135 and the front end side of the skirt portion 122. If it is desired to form such a transverse cut portion 136a, the shape of the second protrusion 32 of the second tool 12 may be made, for example: the both end surfaces 32a and 32b in the axial direction are made flat, and the plug opening direction The secondary side of the slab is formed in a curved shape, so that the transverse cut portion 136a can be formed on both sides of the top plate 121 side of the recessed portion 135 and the front end side of the skirt portion 122.

That is, the present invention is not limited to the above-mentioned embodiment, and various modifications can be made in the implementation stage as long as it does not deviate from the gist of the invention. In addition, it is also possible to appropriately combine the respective embodiments for implementation. In this case, the combined effect can be obtained. In addition, in the above-described embodiment, various inventions are included, and various inventions can be obtained by selecting and combining plural constituent elements disclosed. For example, even if a few of the constituent elements are deleted from all the constituent elements disclosed in the embodiment, if the technical problem of the invention can be solved and the desired effect can be obtained, the structure after this constituent element is deleted, It can also be extracted as an invention.

1: Manufacturing device 11: The first tool 12: The second tool 13: drive device 21: 1st base 21a: hole 22: The first protrusion 23: Rotation axis 31: 2nd base 32: The second protrusion 32a: One end face 32b: the other end face 32c: The first processing department 32c1: side 32d: 2nd processing department 32d1: side 100: Lid 111: The cover body 111A: Molded product 112: Sealing member 112a: Flat part 112b: Curved part 112c: Thick section 121: Top Board 122: Skirt 123: Corner 131: Knurling Department 132: Female thread 133: Tamper-proof belt 133a: Twisted part 135: Concave 135a: end 135b: 1st end 135c: 2nd end 136: Breathable seams 136a: Horizontal cutting part 136b: Longitudinal section 137: The second recess 141: Sliding layer 142: Sealing layer 200: tank container 210: mouth 211: Jaw 212: Male thread 213: Curl

Fig. 1 is a partially cutaway side view showing the structure of the lid and the tank container provided with the lid according to the first embodiment of the present invention. [Fig. 2] is a partially cutaway side view showing the structure of the cover of the first embodiment. [Fig. 3] is a cross-sectional view showing the structure of the cover of the first embodiment. Fig. 4 is a side view showing the structure of the important part of the skirt portion of the cap of the first embodiment. Fig. 5 is a cross-sectional view showing the structure of the important part of the skirt portion of the cap of the first embodiment. Fig. 6 is a schematic plan view showing the structure of the manufacturing apparatus for manufacturing the cap of the first embodiment. Fig. 7 is a perspective view showing the structure of the second protrusion of the second tool used in the manufacturing apparatus shown in Fig. 6. [Fig. 8] A plan view showing the structure of the second protrusion shown in Fig. 7. [Fig. [Fig. 9] A side view showing the structure of the second protrusion shown in Fig. 7. [Fig. [Fig. 10] is an explanatory diagram showing an example of the evaluation test and the results of the evaluation test of the lid of the example and the lid of the comparative example manufactured by the manufacturing apparatus shown in FIG. 6. Fig. 11 is a partially cutaway side view showing the structure of the cover of the second embodiment of the present invention. [Fig. 12] is a cross-sectional view showing the structure of the cover of the second embodiment.

100: Lid

111: The cover body

112: Sealing member

112a: Flat part

112b: Curved part

112c: Thick section

121: Top Board

122: Skirt

123: Corner

131: Knurling Department

133: Tamper-proof belt

133a: Twisted part

135: Concave

135a: end

136: Breathable seams

141: Sliding layer

142: Sealing layer

Claims (9)

A kind of cover with: A cover body with a top plate portion and a cylindrical skirt portion provided on the peripheral edge of the aforementioned top plate portion; It is a sealing member that is different from the cover body and is provided in the cover body opposite to the top plate portion; and Provided in the circumferential direction of the skirt portion, there are a plurality of recesses recessed toward the radially inward direction of the cover body, and the plurality of recesses are used as locking portions to support the sealing member, and the recesses are in the circumferential direction The primary side of the upper bolt opening direction, and at least one of the top plate side of the recess or the front end side of the skirt of the recess is not continuous with the skirt, and the recess is on the circumference The secondary side of the above-mentioned bolt opening direction in the direction is continuous with the above-mentioned skirt part. The cap according to claim 1, wherein the locking portion has: a transverse cut portion extending in the circumferential direction at the end of the top plate portion side of the recess, and the opening direction in the recessed portion A longitudinally cut portion extending along the axial direction of the skirt portion on the primary side end portion of the hem portion. The cap according to claim 2, wherein the end of the recessed portion of the locking portion on the secondary side in the opening direction is inclined from the transverse cut portion of the recessed portion toward the front end side of the skirt portion Or bend. The cap according to any one of claims 1 to 3, wherein the diameter of the inscribed circle of the end on the top plate side of the plurality of recesses is smaller than the outer diameter of the sealing member. A tool with: The second base part is provided with a first tool having a disc-shaped first base part arranged in the cylindrical skirt part of the cover body and a plurality of first protrusions formed on the outer peripheral surface, and The outer peripheral surface facing in the radial direction and having a predetermined curvature is capable of rotating relative to the aforementioned first base; and A plurality of second protrusions provided on the outer peripheral surface of the second base portion can place a part of the skirt portion on the primary side in the direction of opening the cap body and the top plate side of the cap body and the skirt At least one side of the front end side of the pendulum is cut, and the secondary side in the direction of opening the bolt is bent to form a recess. The relative rotation of the first base and the second base is used to depend on the relative rotation of the first base and the second base. They are sequentially arranged between the adjacent first protrusions of the first tool. The tool according to claim 5, wherein the second protrusion cuts the top plate portion side of the cover body of the recessed portion along the rotation direction of the first base portion or the second base portion, and cuts the recessed portion The primary side in the opening direction is cut along the center of rotation of the first base or the second base. The tool according to claim 6, wherein the second protrusion is inclined or curved from the secondary side of the recessed portion in the opening direction toward the front end of the skirt portion. The tool according to any one of claims 5 to 7, wherein the rotation direction of the first base or the second base is the same direction as the opening direction. A manufacturing device with: A first tool, which has a disc-shaped first base portion arranged in a cylindrical skirt portion of the cover body, and a plurality of first protrusions formed on the outer peripheral surface of the first base portion; The second tool is provided with: a second base portion that is provided to face the first tool in the radial direction and has an outer peripheral surface having a predetermined curvature, and which can rotate relative to the first base portion, and a device A plurality of second protrusions on the outer peripheral surface of the second base portion can be used to place a part of the skirt portion on the primary side in the direction of opening the cap body and the top plate side of the cap body and the skirt At least one of the front ends of the part is cut, and the secondary side in the opening direction is bent to form a recess. The relative rotation of the first base and the second base is used to sequentially rotate The ground is arranged between the adjacent first protrusions of the first tool; and A driving device that drives at least one of the first tool and the second tool to rotate.

Images