Hinge cap

Abstract

To provide a hinge cap which has a simple structure, is excellent in productivity, is easy to open, and reliably exhibits and maintains tamper evident properties.SOLUTION: And a tamper-evident piece connected to the upper lid portion via a weakened portion that is breakable at the time of opening, wherein the tamper-evident piece has an engagement hole portion, the main body portion has an engagement protruding portion that can be engaged with the engagement hole portion on an outer peripheral surface side, and the engagement hole portion is formed so that the tamper-evident piece is held between the claw member and the main body portion by riding over at least a claw member provided below a tip side of the engagement protruding portion. The engaging projection part has an upper engaging part formed on the upper surface side of the tip side, and the tamper evident piece is loosely fitted between the upper engaging part and the body part when the weakened part is broken.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a hinge cap having a main body with a pouring hole, a top lid rotatably connected to the main body via a hinge mechanism, and a tamper-evident piece connected to the top lid via a weakened portion that can be broken when opened. [Background technology]

[0002] Conventionally, among hinge caps used at the openings of containers for food products, etc., there is known a hinge cap having a tamper-evident piece that is connected to the top lid portion via a weakened portion that can be broken when the cap is opened, so that the user can distinguish between the unopened and opened state (see, for example, Patent Document 1).

[0003] The hinge cap described in Patent Document 1 has a main body (cap base 2) used at the opening of a container for food or the like, and is configured to be attachable to the opening of the container by having a female thread portion on the inner peripheral surface of the main body (cap base 2). The hinge cap also has an upper lid (lid body 3) that is rotatably connected to the main body (cap base 2) via a hinge mechanism (hinge 4) and configured to be lockable with the main body (cap base 2) by a locking portion (closure portion 31), and a tamper-evident piece (locking piece 6) that is connected to the upper lid (lid body 3) via a weakened portion (breakable portion 62) that can be broken when the cap is opened and has an engagement hole portion (through hole 61). ) has an engaging protrusion (locking protrusion 5) on its outer surface that is configured to be able to engage with the engaging hole portion (through hole 61), and when the engaging protrusion (locking protrusion 5) is locked in the engaging hole portion (through hole 61), the upper lid portion (lid body 3) is opened from the main body portion (cap base 2) via the hinge mechanism (hinge 4), and the weakened portion (breaking portion 62) breaks as the upper lid portion (lid body 3) is opened, and the tamper-evident piece (locking piece 6) moves downward while the engaging hole portion (through hole 61) remains engaged with the engaging protrusion (locking protrusion 5), thereby enabling the opening operation and the opening history display operation to be performed simultaneously. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2014-129104 Summary of the Invention [Problem to be solved by the invention]

[0005] In the known hinge cap disclosed in Patent Document 1 and the like, a locking piece 6 that functions as a tamper-evident device is formed at a position offset by 90 degrees from the hinge 4 at the lower end of the peripheral wall of the lid body 3 . Therefore, for example, when producing the cap base 2, after the lid body 3 is fitted to the cap base 2, when the locking piece 6 is to be locked to the locking protrusion 5, the locking piece 6 must be locked to the locking protrusion 5 from a direction that is 90 degrees shifted from the direction in which the lid body 3 was fitted to the cap base 2, which increases the number of production steps and may increase production costs. Furthermore, because the locking piece 6 and the finger hook portion 34 provided on the lid body 3 are positioned at a 90-degree angle, when the lid body 3 is first opened from the cap base 2 from an unopened state, even if a load is applied by placing a finger on the finger hook portion 34, the load will not be applied evenly to the cutout portion 63 of the locking piece 6, which may make it difficult for the user to break the cutout portion 63 even if they simply apply force in the opening direction. In addition, the momentum of opening may cause an uneven load to be applied to the hinge 4, which may cause the hinge 4 to be damaged. Furthermore, the broken surface may be fuzzy and uneven, which may injure the person opening the package.

[0006] Furthermore, after the locking piece 6 is broken from the lid body 3 by the cutout portion 63 during the initial opening operation, the locking piece 6 remains locked to the locking protrusion 5, but there are no other formations on the outer peripheral surface of the cap base 2 other than the locking protrusion 5 and the locking piece 6 locked to the locking protrusion 5, and the locking protrusion 5 and the locking piece 6 are exposed on the outer peripheral surface of the cap base 2. Therefore, if the locking protrusion 5 or the locking piece 6 collides with another object when the container to which the cap 1 is attached is moved or stored, there is a risk that the locking protrusion 5 or the locking piece 6 will be damaged and the tamper-evident function will no longer be guaranteed. Furthermore, the locking protrusion 5 and locking piece 6 are formed small relative to the cap base 2, and furthermore, the vertical size of the through hole 61 of the locking piece 6 is formed slightly larger relative to the vertical size of the locking protrusion 5. Therefore, even if the cutout portion 63 breaks and the locking piece 6 moves downward, the amount of downward movement is small, and there is a risk that tamper-evident properties will not be guaranteed. Furthermore, since the locking piece 6 is formed to have a certain thickness relative to the cap base 2 and the lid body 3, it may be difficult to visually check whether the container has been opened or not, and it may also be difficult to lock the locking piece 6 into the locking protrusion 5.

[0007] The present invention aims to solve these problems by providing a hinge cap that has a simple configuration, improves productivity during manufacturing, is easy to open, and can reliably perform and maintain its tamper-evident function when opened. [Means for solving the problem]

[0008] The hinge cap of the present invention is a hinge cap having a main body portion with a pouring hole, a top lid portion rotatably connected to the main body portion via a hinge mechanism, and a tamper-evident piece connected to the top lid portion via a weakened portion that can be broken when the cap is opened, wherein the tamper-evident piece has an engaging hole portion, and the main body portion has an engaging protrusion on its outer surface that can engage with the engaging hole portion, and the engaging hole portion is formed so that the tamper-evident piece is held between the claw member and the main body portion by climbing over a claw member provided at least below the tip side of the engaging protrusion, and the engaging protrusion has an upper engaging portion formed on the upper surface side of the tip side, and is configured so that the tamper-evident piece is loosely fitted between the upper engaging portion and the main body portion when the weakened portion is broken, thereby solving the above-mentioned problem. [Effects of the Invention]

[0009] According to the invention of claim 1, the engagement hole portion is formed so that the tamper-evident piece is held between the claw member and the main body portion by climbing over the claw member provided at least below the tip side of the engagement protrusion, and the engagement protrusion has an upper engagement portion formed on the upper surface side of the tip side, and is configured so that when the weakened portion breaks, the tamper-evident piece is loosely fitted between the upper engagement portion and the main body portion, thereby preventing the tamper-evident piece from tilting or rattling when the container is tilted to pour out the contents of the container after the weakened portion breaks.

[0010] According to the configuration described in claim 2, the weakened portion and the hinge mechanism are arranged in opposing positions around the circumference of the upper cover portion, and the engaging protrusion has a rib formed at the boundary with the main body portion. This makes it possible to perform the process of engaging the upper cover portion with the main body portion and the process of engaging the engaging hole portion with the engaging protrusion in the same direction during manufacturing, thereby improving productivity. Furthermore, the weakened portion can be cut with a force in the same direction as the opening direction of the upper cover portion, making it easier to open and preventing the cut surface from becoming uneven. Furthermore, when the container is tilted to pour out the contents after the weakened portion has broken, tilting and rattling of the tamper-evident piece can be further suppressed.

[0011] According to the configuration described in claim 3, by having a protrusion below the tamper-evident piece when the engagement hole portion engages with the engagement protrusion, it is possible to prevent the tamper-evident piece engaged with the engagement protrusion from being subjected to external impact, and to prevent the weakened portion from being cut during transportation or movement in an unopened state. According to the configuration described in claim 4, since claw members are provided on both the left and right sides of the tip of the engaging protrusion, before the top cover is opened for the first time, the tamper-evident piece can be securely held by the three claw members, the right side claw, the left side claw, and the lower claw, and after the top cover is opened, the tamper-evident piece can be securely held by the two claw members, the right side claw and the left side claw.

[0012] According to the configuration described in claim 5, after the engagement hole portion is held between the claw member and the main body portion, a gap is formed between the engagement hole portion and the upper surface of the engagement protrusion, and after the weakened portion is broken, the tamper-evident piece falls freely while remaining held between the claw member and the main body portion, and the engagement hole portion and the upper surface of the engagement protrusion come into contact, allowing the piece to function as a clear tamper-evident piece that is easy to identify visually, and by changing the vertical length of the engagement hole portion and the vertical thickness of the engagement protrusion, it is possible to freely adjust the falling distance of the tamper-evident piece.

[0013] According to the configuration described in claim 6, the locking portion is arranged on the inner surface of the skirt portion, the main body portion has an lockable portion on the outer surface side that can be locked with the locking portion, and the top lid portion and the main body portion are configured to be lockable, so that the top lid portion can be securely locked to the main body portion and accidental discharge of the contents can be prevented.

[0014] According to the configuration described in claim 7, the skirt portion has a flange portion formed on the outer surface side, which allows the upper lid portion to be opened by hooking a finger on the flange portion, making it easier to break the weakened portion and improving the operability of the upper lid portion. Furthermore, since the weakened portion is provided below the skirt portion, it is possible to prevent the tamper-evident piece engaged with the engaging protrusion from being subjected to external impact, and to prevent the weakened portion from being cut during transportation or movement in an unopened state. According to the configuration of claim 8, the main body has a pouring tube portion and an attachment portion that is provided below the pouring tube portion and can be attached to a container, and since the engagement protrusion is provided on the outer surface of the pouring tube portion, it can be used as a so-called spout that can be directly attached to a container such as a pouch. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a perspective view of a hinge cap 100 according to a first embodiment of the present invention, seen from above before sealing; [Figure 2] 1 is an enlarged perspective view of an engaging protrusion 120 of a hinge cap 100 according to a first embodiment of the present invention, viewed from above. [Figure 3] FIG. 10 is an enlarged perspective view of an engaging protrusion 120b of a hinge cap 100b according to a second embodiment of the present invention, seen from above. [Figure 4] FIG. 10 is an enlarged perspective view of an engaging protrusion 120b of a hinge cap 100b according to a second embodiment of the present invention, viewed from below. [Figure 5] FIG. 10 is a cross-sectional view of a hinge cap 100b according to a second embodiment of the present invention before sealing. [Figure 6] FIG. 10 is a cross-sectional view of a hinge cap 100b according to a second embodiment of the present invention in the middle of sealing. [Figure 7] FIG. 10 is a cross-sectional view of a hinge cap 100b according to a second embodiment of the present invention after sealing. [Figure 8] FIG. 10 is a cross-sectional view of a hinge cap 100b according to a second embodiment of the present invention when opened. [Figure 9]FIG. 10 is an enlarged perspective view of an engaging protrusion 120b of a hinge cap 100b according to a second embodiment of the present invention after sealing. [Figure 10] 10A and 10B are perspective views of the sealing operation of the hinge cap 100b according to the second embodiment of the present invention. [Figure 11] 10A and 10B are perspective views of an opening operation of a hinge cap 100b according to a second embodiment of the present invention. [Figure 12] FIG. 10 is a cross-sectional view of a hinge cap 100b according to a second embodiment of the present invention when in use. DETAILED DESCRIPTION OF THE INVENTION

[0016] A hinge cap 100 according to a first embodiment of the present invention will be described below with reference to the drawings. As shown in Figures 1 and 2, the hinge cap 100 according to the first embodiment of the present invention comprises a main body 110 having a pouring hole 111, a top cover 130 rotatably connected to the main body 110 via a hinge mechanism 150 consisting of an elastic piece, and a tamper-evident piece 140 connected to the top cover 130 via a weakened portion 131 that can be broken when opened.

[0017] The main body 110 includes a cylindrical pouring tube 113 and a pouring hole 111 provided in the center of the pouring tube 113, and is configured so that the contents can be poured out through the pouring hole 111. In addition, the main body 110 has an engaging protrusion 120 formed on the outer peripheral surface of the dispensing tube 113, a locking portion 112 formed on the outer peripheral surface of the dispensing tube 113 above the engaging protrusion 120, a protrusion 115 formed on the outer peripheral surface of the dispensing tube 113 below the engaging protrusion 120, and an attachment portion 114 formed on the lower side of the dispensing tube 113. The locked portion 112 has a semicircular protrusion shape, and is formed above the engaging protrusion 120 so as to follow the circumferential direction of the pouring cylindrical portion 113 . The protrusion 115 has a flat surface on its upper portion, and is configured to be located below the tamper-evident piece 140 when the engagement hole 141 and the engagement protrusion 120 are engaged. The attachment part 114 is configured to be attachable to a container, and by attaching it directly to a container such as a pouch, it can be used as a so-called spout.

[0018] The engaging protrusion 120 is formed on the outer peripheral surface of the dispensing tube portion 113, and as shown in Figure 2, a claw member 121 is formed below the tip side of the engaging protrusion 120, and an upper surface portion 126 is formed on the tip side of the engaging protrusion 120 via a step portion 127, and an upper engaging portion 122 is formed in the center of the upper surface portion. The claw member 121 is formed over the entire area below the tip side of the engagement protrusion 120, and the claw member 121 has a downward vertical surface 121-2 that is steep in the vertical direction on the side facing the main body 110, and a downward inclined surface 121-1 that is configured to form an oblique angle with the downward vertical surface 121-2 on the side opposite the main body 110. The upper engaging portion 122 is formed on the upper surface of the tip end of the engaging protrusion 120, and in this embodiment, is formed only in the center portion of the engaging protrusion 120.

[0019] The top cover portion 130 is rotatably connected to the main body portion 110 via a hinge mechanism 150 consisting of an elastic piece, and has a top cover top surface 132, a skirt portion 133 hanging down from the periphery of the top cover top surface 132, and a bottom edge 134 of the top cover that connects the skirt portion 133 to the underside of the top cover portion 130. The top surface of the upper lid 132 is formed so as to be positioned above the pouring hole 111 when the hinge cap 100 is sealed, and is configured to prevent the contents from leaking. The skirt portion 133 is formed to hang down from the periphery of the top surface 132 of the upper cover and forms the outer surface of the upper cover portion 130. A locking portion 135 is provided on the inner surface of the skirt portion 133, and a flange portion 136 is formed on the outer surface of the skirt portion 133. The locking portion 135 has a semicircular protrusion shape similar to the locked portion 112, and when the hinge cap 100 is sealed, the locking portion 135 climbs over the locked portion 112, thereby allowing the locking portion 135 and the locked portion 112 to be locked together. In this embodiment, the flange portion 136 is formed on the outer peripheral surface of the skirt portion 133 at a position opposite the hinge mechanism 150, and is configured so that the upper cover portion 130 can be rotated via the hinge mechanism 150 by hooking a finger thereon.

[0020] The top cover portion 130 has a weakened portion 131 on the lower edge 134 of the top cover that can be broken when the hinge cap 100 is opened, and in this embodiment, the tamper-evident piece 140 is connected via two bridge-shaped weakened portions 131. At this time, the thickness direction of the tamper-evident piece 140 is connected at an angle perpendicular to the lower edge 134 of the upper cover, and is configured so that the positional relationship is maintained even when the locking portion 135 and the locked portion 112 are locked together. The weakened portion 131 is arranged on the lower edge 134 of the top cover at a position opposite the hinge mechanism 150, and is configured to be located below the skirt portion 133 and the flange portion 136 when the hinge cap 100 is sealed.

[0021] The tamper-evident piece 140 is a tapered thin plate and has a rectangular engagement hole 141 . The engagement hole portion 141 is configured to be able to engage with the engagement protrusion 120 when the hinge cap 100 is sealed, and is formed so that a gap is created between the upper surface of the engagement protrusion 120 when it is held between the claw member 121 and the dispensing tube portion 113 of the main body portion 110.

[0022] The hinge mechanism 150 is made of an elastic piece and has hinges at two locations on the lower edge 134 of the top cover and one location on the skirt portion 133, thereby connecting the top cover portion 130 to the main body portion 110 so that the top cover portion 130 can rotate.

[0023] Next, a hinge cap 100b according to a second embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 3 and 4, a hinge cap 100b according to the second embodiment of the present invention has an engaging protrusion 120b, and is identical in configuration to the hinge cap 100 except for the engaging protrusion 120b.

[0024] The engaging protrusion 120b is formed on the outer peripheral surface of the pouring tube portion 113b, and has a claw member 121b formed below the tip side of the engaging protrusion 120b, an upper engaging portion 122b formed on the upper surface side of the tip side of the engaging protrusion 120b, a rib 123b formed at the boundary with the main body portion 110b, a right side claw member 124b provided on the right side of the tip side of the engaging protrusion 120b, and a left side claw member 125b provided on the left side of the tip side of the engaging protrusion 120b. The claw member 121b is formed over the entire area below the tip side of the engagement protrusion 120b, and the claw member 121b has a downward vertical surface 121-2b that is steep in the vertical direction on the side of the main body 110b, and a downward inclined surface 121-1b that is configured to form an oblique angle with the downward vertical surface 121-2b on the side opposite the main body 110b. The upper engaging portion 122b is formed on the upper surface of the tip end of the engaging protrusion 120b, and in this embodiment, is formed only in the center portion of the engaging protrusion 120b. The rib 123b is formed at the boundary with the main body portion 110b, and in this embodiment, is formed in the vertical direction in the middle of the connecting surface between the main body portion 110b and the engaging protrusion 120b. The right side claw member 124b is formed on the right side of the tip of the engagement protrusion 120b, and the right side claw member 124b has a right side vertical surface 124-2b that is steep in the vertical direction on the main body 110b side, and a right side inclined surface 124-1b that is configured to form an oblique angle with the right side vertical surface 124-2b on the side opposite to the main body 110b. The left side claw member 125b is formed on the left side of the tip of the engaging protrusion 120b, and the left side claw member 125b has a left side vertical surface 125-2b that is steep in the vertical direction on the main body 110b side, and a left side inclined surface 125-1b that is configured to form an oblique angle with the left side vertical surface 125-2b on the side opposite the main body 110b.

[0025] Next, the sealing operation of the hinge cap 100b according to the second embodiment of the present invention will be described with reference to the drawings. First, before the hinge cap 100b is sealed, as shown in Figure 5, the upper cover portion 130b is held in a position where the axial direction of the pouring hole 111b and the thickness direction of the upper cover portion 130 are parallel, and the tamper-evident piece 140b is connected to the upper cover portion 130b via the weakened portion 131b so that the thickness direction of the tamper-evident piece 140b and the lower edge 134b of the upper cover form a perpendicular angle. Next, when the top cover 130b is rotated 180 degrees via the hinge mechanism 150b and the locking portion 135b is locked with the locked portion 112b, the state shown in FIG. 6 is reached. At this time, the thickness direction of the tamper-evident piece 140b and the lower end edge 134b of the upper cover are maintained at a perpendicular angle.

[0026] Next, an external force is applied to the upper surface of tamper-evident piece 140b, and tamper-evident piece 140b is rotated 90 degrees via weakened portion 131b, causing weakened portion 131b to plastically deform without breaking, and engaging hole portion 141b and engaging protrusion 120b are engaged with each other, as shown in Figure 7. At this time, the lower surface of engagement hole portion 141b contacts downward inclined surface 121-1b, the right side surface of engagement hole portion 141b contacts right inclined surface 124-1b, and the left side surface of engagement hole portion 141b contacts left inclined surface 125-1b, and then tamper-evident piece 140b climbs over downward inclined surface 121-1b, right inclined surface 124-1b, and left inclined surface 125-1b, and is guided and rotated to the lower vertical surface 121-2b. As a result, as shown in Figure 10, the tamper-evident piece 140b is held between the lower vertical surface 121-2b, the right-side vertical surface 124-2b, and the left-side vertical surface 125-2b and the pouring tube portion 113b, and the sealing operation is completed with a gap occurring between the upper surface of the engagement hole portion 141b and the upper surface of the engagement protrusion 120b. Here, a gap is formed between the lower side of the tamper-evident piece 140b and the upper surface side of the protrusion 115b after the sealing operation is completed.

[0027] Next, an opening operation of the hinge cap 100b according to the second embodiment of the present invention will be described with reference to the drawings. First, as shown in FIGS. 7 and 9, in a state after the sealing operation is completed, an external force is applied to the flange portion 136b to rotate the upper cover portion 130b via the hinge mechanism 150b. At this time, the lower surface of the engagement hole 141b abuts against the lower surface 120-B of the engagement protrusion 120b, restricting the upward movement of the tamper-evident piece 140b, so that an external force is applied to the weakened portion 131b, causing the weakened portion 131b to break. As a result, the tamper-evident piece 140b falls freely while remaining held between the claw member 121b and the dispensing tube portion 113b, and as shown in Figure 8, the upper surface of the engagement hole portion 141b comes into contact with the upper surface 120-T of the engagement protrusion 120b, stopping the free fall of the tamper-evident piece 140b and making it loosely fitted between the upper engagement portion 122b and the rib 123b, thereby completing the initial opening operation. As a result of the above-mentioned opening operation, as shown in FIG. 11, the gap between the lower end of tamper-evident piece 140b and the upper surface of protrusion 115b becomes smaller than before weakened portion 131b was broken, thereby enabling tamper-evident piece 140b to exhibit clear tamper-evident properties. Furthermore, as shown in Figures 8 and 11, when the tamper-evident piece 140 is in a lowered state, the upper engagement portion 122 extends upward, but is in a position that does not cover the weakened portion 131b after rupture (the upper end of the upper engagement portion 122 is in a position lower than the upper end of the tamper-evident piece 140), so that the weakened portion 131b after rupture can be easily seen, improving tamper-evident properties. For the second and subsequent sealing and opening operations, the tamper-evident piece 140b has already fallen due to the rupture of the weakened portion 131b, so even if the top cover portion 130b is sealed again, the tamper-evident properties of the hinge cap 100b will not be affected.

[0028] Next, prevention of the tamper-evident piece 140b from falling off and rattling when the hinge cap 100b according to the second embodiment of the present invention is used will be described with reference to FIG. First, as shown in FIG. 12, when the container to which the hinge cap 100b is attached is tilted in order to pour the contents from the pouring hole 111b after opening the hinge cap 100b, the tamper-evident piece 140b also tilts accordingly. At this time, the tamper-evident piece 140b tilts while loosely fitted between the upper engagement portion 122b and the rib 123b, but the upper engagement portion 122b restricts the movement of the engagement protrusion 120b toward the tip, so that the tamper-evident piece 140b does not fall off from the engagement protrusion 120b. Furthermore, as the inclination of hinge cap 100b approaches the horizontal direction, even if tamper-evident piece 140b rotates in the clockwise direction in Figure 12, the back surface of tamper-evident piece 140b abuts against rib 123b, stopping the rotation of tamper-evident piece 140b and preventing tilting and rattling of tamper-evident piece 140b.

[0029] Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design modifications can be made without departing from the present invention as set forth in the claims. For example, in the above-described embodiment, the tamper-evident piece 140 is connected to the lower edge 134 of the upper cover via two bridge-shaped weakened portions 131, but the weakened portions 131 are not limited to being bridge-shaped and may be any breakable shape such as a thin film shape. Furthermore, in the above-described embodiment, the mounting portion 114 of the main body 110 is shaped to be directly attached to a container such as a pouch, but it may also be shaped to accommodate other mounting forms, such as a shape that fits into a resin bottle. [Explanation of symbols]

[0030] 100 ··· Hinge cap 110 Main body 111... Outlet hole 112 ... Locked part 113 ··· Pour cylinder part 114 Mounting part 115... protrusion 120... Engaging protrusion 120-T...Top surface 120-B ··· Bottom surface 121... Claw member (lower) 121-1 Downward slope 121-2 Downward vertical plane 122... Upper engaging part 123 Ribs 124 ... Right side claw member 124-1 · · Right slope 124-2 · Right vertical plane 125...Left side claw member 125-1 ··· Left side slope 125-2 · · Left side vertical plane 126...Top part 127 ··· Stepped section 130 Top cover 131 Weakened section (bridge) 132 Top of the lid 133 ··· Skirt part 134 Lower edge of top cover 135 Locking portion 136 ··· flange 140 Tamper-evident strip 141 Engagement hole portion 150 ··· Hinge mechanism

Claims

1. a main body portion having a spout hole; an upper cover portion rotatably connected to the main body portion via a hinge mechanism; a tamper-evident piece connected to the top cover portion via a weakened portion that can be broken when the hinge cap is opened, The tamper-evident piece has an engagement hole portion, the main body has an engaging protrusion on an outer circumferential surface thereof that can engage with the engaging hole, the engagement hole is formed so that the tamper-evident piece is held between a claw member and the main body by climbing over a claw member provided below at least the tip end side of the engagement protrusion, The engaging protrusion has an upper engaging portion formed on an upper surface side of the tip end side, A hinge cap characterized in that the tamper-evident piece is configured to be loosely fitted between the upper engagement portion and the main body portion when the weakened portion is broken.

2. the weakened portion and the hinge mechanism are disposed at opposing positions on the circumference of the top cover portion, 2. The hinge cap according to claim 1, wherein the engaging protrusion has a rib formed at a boundary with the main body.

3. 2. The hinge cap according to claim 1, wherein the main body has a protrusion below the tamper-evident piece when the engagement hole engages with the engagement protrusion.

4. 2. The hinge cap according to claim 1, wherein claw members are provided on both the left and right sides of the tip end of the engaging protrusion.

5. the engagement hole portion is formed so as to create a gap between the engagement hole portion and an upper surface of the engagement protrusion when the engagement hole portion is held between the claw member and the main body portion, The hinge cap according to claim 1, characterized in that after the weakened portion breaks, the tamper-evident piece falls freely while remaining held between the claw member and the main body portion, causing the engagement hole portion to abut against the upper surface of the engagement protrusion.

6. The top lid portion has a top surface of the top lid, a skirt portion hanging down from the periphery of the top surface of the top lid, and a bottom edge of the top lid connecting the skirt portion to the bottom side of the top lid portion, A locking portion is provided on the inner peripheral surface side of the skirt portion, the main body has an engaged portion on its outer circumferential surface that can be engaged with the engaging portion, 2. The hinge cap according to claim 1, wherein the top cover and the main body are configured to be lockable with each other.

7. The skirt portion has a flange portion formed on the outer circumferential surface side, 7. The hinge cap according to claim 6, wherein the weakened portion is provided below the skirt portion.

8. the main body portion has a cylindrical pouring portion and an attachment portion provided below the cylindrical pouring portion and attachable to a container, 2. The hinge cap according to claim 1, wherein the engaging protrusion is provided on an outer peripheral surface of the pouring tube portion.

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