JP7580348B2 - Hinge Cap - Google Patents

Description

The present invention relates to a hinge cap.

Patent document 1 describes a hinge cap that includes a cap body that is attached to the mouth of a container body in which the contents are stored and has a spout formed therein for pouring out the contents, a topped cylindrical lid body that is rotatably connected to the cap body around a hinge and covers the spout so as to be able to be opened and closed freely, and a closing body that is connected to the opening edge of the spout via a weakened portion and closes the spout.
In the hinge cap of Patent Document 1, a pull ring for removing the cap is provided on the closure, and after the lid body is rotated around the hinge relative to the cap body, the pull ring is pulled up to break the weakened portion and open the spout.

JP 2016-222310 A

With conventional hinge caps, after opening the lid, it was necessary to pull up the pull ring, leaving room for improvement in ease of opening.

One of the objectives of the present invention is to provide a hinge cap that improves operability when opening.

One aspect of the hinge cap of the present invention comprises a cap body having a cylindrical shape with a top that is attached to the mouth of a container body in which contents are stored, a cylindrical lid body having a top that is placed on the upper side of the cap body, and a hinge that connects the lid body to the cap body so as to be able to open and close. In a plan view seen from the top-bottom direction, the cap body is arranged such that an imaginary straight line that passes through the circumferential center of the hinge and the cap axis and extends in the front-back direction is taken as the front-back center line, and the cap body comprises an annular cap top wall having a spout, a blocking body that blocks the spout, The closure has a breakable weakened portion that connects the outer periphery of the closure and the inner periphery of the cap top wall, the closure has a closure plate portion, a lifting portion that protrudes upward from the front end of the closure plate portion, and a breaking protrusion that protrudes forward from the lifting portion and connects to the upper surface of the front end of the weakened portion, the lid has a plug-removing portion that protrudes downward from the lid top wall and engages with the lifting portion, and when viewed in a plan view from the top-bottom direction, the left-right center of the breaking protrusion is positioned in a position that is shifted left-right from the front-to-back center line.

In the hinge cap of the present invention, when the lid is rotated around the hinge relative to the cap body in the opening direction, the uncorking portion of the lid pulls the lifting portion upward (upward toward the rear). At this time, a lifting force is concentrated from the breaking protrusion on the front side of the lifting portion to the starting point of the weakened portion adjacent to the breaking protrusion, and the weakened portion begins to break from this starting point. By further opening the lid, the closure is separated from the top wall of the cap, and the spout is opened. According to the present invention, the spout can be opened by the simple operation of rotating the lid around the hinge, improving operability when opening the cap.

In the present invention, the center of the rupture protrusion in the left-right direction is positioned at a position offset in the left-right direction from the front-to-rear center line in a plan view from the top-to-bottom direction, so stress can be concentrated more efficiently from the rupture protrusion to the starting point of the weakened portion. Therefore, when the lid is opened to open the spout, the weakened portion can begin to break with less force. This improves operability when opening the container.

In the above hinge cap, it is preferable that the breaking protrusion further has a portion that connects to the underside of the front end of the weakened portion.

In this case, the stress can be efficiently concentrated on the weakened portion by the breaking protrusions that connect to the upper and lower surfaces of the front end of the weakened portion. The weakened portion can be started to break with less force, which improves operability when opening the package.

In the above hinge cap, the cap top wall has a convex portion disposed on the inner periphery of the cap top wall, and the convex portion is preferably located on the opposite side of the center of the rupture protrusion in the left-right direction across the front-to-rear center line in a plan view seen from the top-bottom direction, and faces the rupture protrusion via the weakened portion.

In this case, it is easier to concentrate stress on the starting point of the weakened portion, which is located between the breaking protrusion and the convex portion. The weakened portion can begin to break with less force, which improves operability when opening the package.

In the above hinge cap, it is preferable that the breaking protrusion has a flat portion that extends parallel to the front-to-rear center line when viewed in a plan view from the top-to-bottom direction.

In this case, the breaking protrusion can be made sharp toward the front, so that when the lid is opened, the weakened portion can be broken more easily along the linear flat surface extending in the front-to-rear direction when viewed from above.

In the above hinge cap, it is preferable that the closure plate portion extends downward as it moves toward the front.

In this case, the front end of the closure plate is inclined downward toward the front, so when the cap is opened, the closure plate is pulled upward toward the rear via the lifting part, making it easier for the weakened part to break from the front end of the closure plate.

The hinge cap of one embodiment of the present invention can improve operability when opening the cap.

FIG. 1 is a cross-sectional view showing the hinge cap of the present embodiment, illustrating a state in which the lid body is closed. 2 is a top view of the hinge cap of this embodiment, showing the lid body in an open state. Note that the removal part is not shown. 3 is a bottom view of the hinge cap of this embodiment, showing the lid body in an open state. Note that the removal part is not shown. FIG. 4 is a cross-sectional perspective view showing a cross section taken along line AA of FIG. FIG. 5 is a cross-sectional perspective view showing a cross section taken along line AA of FIG. FIG. 6 is an enlarged top view of a portion VI in FIG. FIG. 7 is an enlarged bottom view of part VII in FIG.

A hinge cap 1 according to an embodiment of the present invention will be described with reference to the drawings. In the following description, the hinge cap 1 may be abbreviated to simply "cap." Fig. 1 shows the hinge cap 1 in a closed state (cap closed state), and Figs. 2 and 3 show the hinge cap 1 in an open state (cap open state).
The hinge cap 1 of this embodiment is attached to the mouth of a bottomed cylindrical container body (not shown) in which liquid contents are contained, for example.

As shown in FIG. 1, the hinge cap 1 comprises a cap body 2 having a cylindrical shape with a top centered on a cap axis O, a cylindrical lid 3 having a top, and a hinge 4 that connects the cap body 2 and the lid 3 so that they can rotate relative to one another. The cap body 2 is attached to the cylindrical mouth of a container body (not shown). The cap body 2 is fixed to the mouth of the container body by undercut fitting or the like to prevent it from coming loose. The cap body 2, the lid 3, and the mouth of the container body are arranged coaxially with each other, with the cap axis O as the common axis.

In this embodiment, the direction in which the cap axis O extends, i.e., the direction parallel to the cap axis O, is referred to as the up-down direction. In the up-down direction, the direction from the bottom of the container body (not shown) to the lid top wall 3b of the lid body 3 is referred to as the upper side, and the direction from the lid top wall 3b to the bottom of the container body is referred to as the lower side.
In a plan view seen from the top and bottom direction, a direction perpendicular to the cap axis O is called a radial direction. In the radial direction, a direction approaching the cap axis O is called a radially inner direction, and a direction away from the cap axis O is called a radially outer direction.
The direction going around the cap axis O is called the circumferential direction.

As shown in Figures 2 and 3, in a plan view seen from the top and bottom, the direction in which an imaginary straight line L that passes through the circumferential center of the hinge 4 and the cap axis O extends is called the front-to-rear direction. The front-to-rear direction is one of the radial directions. Within the front-to-rear direction, the direction from the hinge 4 to the cap axis O is called the front side, and the direction from the cap axis O to the hinge 4 is called the rear side. In this embodiment, the imaginary straight line L that extends in the front-to-rear direction is defined as the "front-to-rear center line L."

In addition, in a plan view seen from the top and bottom, the direction perpendicular to the front-to-back direction is called the left-to-right direction. The left-to-right direction is a radial direction that is separate from the front-to-back direction. In the top view of the cap in FIG. 2, when the hinge cap 1 is viewed from the front, the direction toward the left from the cap axis O in the left-to-right direction is called the left side, and the direction toward the right from the cap axis O is called the right side. In the bottom view of the cap in FIG. 3, the left-to-right direction is reversed from that in FIG. 2, so when the hinge cap 1 in FIG. 3 is viewed from the front, the direction toward the right from the cap axis O corresponds to the left side, and the direction toward the left from the cap axis O corresponds to the right side.

As shown in FIG. 1, the cap body 2 has a cap peripheral wall 2a and a cap top wall 2b.
The cap peripheral wall 2a is cylindrical and centered on the cap axis O. The cap peripheral wall 2a is fitted onto the mouth of a container body (not shown). The cap peripheral wall 2a is attached to the mouth of the container body by undercut fitting or the like.

The cap top wall 2b is connected to the upper end of the cap peripheral wall 2a. The cap top wall 2b contacts the upper opening edge of the mouth of the container body (not shown) from above. The cap top wall 2b is annular and has a spout 2c, specifically, a ring plate shape. As shown in FIG. 2, in this embodiment, the spout 2c is a roughly diamond-shaped hole. The dimension of the spout 2c in the front-to-back direction is greater than the dimension in the left-to-right direction. Therefore, the spout 2c extends in the front-to-back direction. The front end of the spout 2c is sharp and convex toward the front.

The cap top wall 2b has a protrusion 2e.
As shown in Fig. 7, the protrusion 2e is disposed on the inner periphery of the cap top wall 2b. Specifically, the protrusion 2e is disposed on the front end of the inner periphery of the cap top wall 2b, and is located below a weakened portion 25 described below. The protrusion 2e has a generally triangular shape in the bottom view shown in Fig. 7, and protrudes radially inward from the inner periphery of the cap top wall 2b. The protrusion 2e is disposed at a position shifted in the left-right direction from the front-rear center line L. In this embodiment, the protrusion 2e is disposed to the right of the front-rear center line L.

As shown in FIG. 1 , the cap body 2 has a fitting tubular portion 21 , a pouring tubular portion 22 , a locking rib 23 , a blocking body 24 , and a weakened portion 25 .
The fitting tubular portion 21 is provided so as to hang down from the cap top wall 2b. The fitting tubular portion 21 is cylindrical and has its center on the cap axis O. The fitting tubular portion 21 is fitted into the mouth of a container body (not shown).

The pouring tube portion 22 is erected upward from the cap top wall 2b. The pouring tube portion 22 is generally cylindrical with the cap axis O as its center. The height (protruding dimension) of the pouring tube portion 22 protruding upward from the cap top wall 2b increases from the rear end to the front end of the pouring tube portion 22. That is, the upper end opening edge of the pouring tube portion 22 is located higher from the rear end to the front side of the pouring tube portion 22. The pouring tube portion 22 is disposed at the upper end of the pouring tube portion 22 and has a flange-shaped lip portion 22a that expands radially outward. As shown in FIG. 2, the lip portion 22a is annular and extends around the entire circumference at the upper end of the pouring tube portion 22 in the circumferential direction. The pouring tube portion 22 surrounds the pouring outlet 2c from the radial outside to the entire circumference in the circumferential direction.

As shown in Figures 1 and 2, the locking rib 23 protrudes upward from the front end of the cap top wall 2b and extends circumferentially. The locking rib 23 is located radially outward and forward of the pouring tube portion 22. The locking rib 23 has a locking protrusion 23a. The locking protrusion 23a is located at the upper end of the locking rib 23 and protrudes radially outward and forward.

The closure 24 is disposed radially inward of the cap top wall 2b and blocks the pouring outlet 2c. As shown in Figures 2 and 3, in this embodiment, the closure 24 is generally diamond-shaped. The dimension of the closure 24 in the front-to-rear direction is greater than the dimension in the left-to-right direction. Therefore, the closure 24 extends in the front-to-rear direction. The front end of the closure 24 also has a pointed shape that is convex toward the front. In the plan view shown in Figures 2 and 3, the closure 24 has generally the same shape (similar shape) as the pouring outlet 2c.

The blocking body 24 has a blocking plate portion 26 , a lifting portion 27 , and a breaking protrusion 28 .
The closure plate 26 is in the form of a plate extending in a direction substantially perpendicular to the cap axis O. In this embodiment, the closure plate 26 is in the form of a substantially diamond-shaped plate. As shown in Fig. 1, the closure plate 26 extends downward as it approaches the front. In other words, the closure plate 26 is inclined forward with respect to a virtual plane (not shown) perpendicular to the cap axis O.

As shown in Figures 2 and 4, the closure plate portion 26 has a peripheral rib 26a. The peripheral rib 26a protrudes upward from the upper surface of the closure plate portion 26. The peripheral rib 26a is disposed on the outer periphery of the closure plate portion 26 and extends along this outer periphery. Specifically, the peripheral rib 26a is disposed on the outer periphery of the upper surface of the closure plate portion 26 other than the lifting portion 27.

1, 4 and 6, the lifting portion 27 is disposed at the front end of the blocking body 24. The lifting portion 27 protrudes upward from the front end of the blocking plate portion 26. The lifting portion 27 is tubular and extends in the vertical direction.
The lifting portion 27 includes a lifting tube 27a, a partition wall 27b, and a vertical rib 27c.

The pulling tube 27a is cylindrical and centered on a pulling axis C parallel to the cap axis O, and extends in the vertical direction. The pulling axis C is located forward of the cap axis O. In other words, the pulling axis C is located on the opposite side of the hinge 4 with the cap axis O in between. The direction in which the pulling axis C extends corresponds to the vertical direction. In the following description, in a plan view seen from the vertical direction, the direction perpendicular to the pulling axis C is referred to as the pulling axis radial direction, and the direction rotating around the pulling axis C is referred to as the pulling axis circumferential direction.
The outer diameter of the upper portion of the pulling tube 27a is constant along the vertical direction, whereas the outer diameter of the lower portion of the pulling tube 27a increases downward.

As shown in FIG. 1, the partition wall 27b divides the internal space of the pulling tube 27a in the vertical direction. The outer periphery of the partition wall 27b is connected to the inner periphery of the pulling tube 27a. The partition wall 27b is disposed in approximately the center of the pulling tube 27a in the vertical direction.

As shown in Figures 1 and 6, the vertical rib 27c protrudes rearward from the rear end of the outer peripheral surface of the lifting tube 27a and extends in the vertical direction. The upper end of the vertical rib 27c is located lower than the upper end of the lifting tube 27a. The lower end of the vertical rib 27c is connected to the upper surface of the closure plate portion 26.

4 and 6, the breaking protrusion 28 protrudes forward from the pulling-up tube 27a and extends in the vertical direction. That is, the breaking protrusion 28 protrudes forward from the pulling-up portion 27. The breaking protrusion 28 is located at the front end of the blocking body 24.
5 and 7, the breaking protrusion 28 also protrudes forward from the closing plate portion 26. That is, the breaking protrusion 28 is disposed across the lifting portion 27 and the closing plate portion 26 in the up-down direction.

The breaking projection 28 has an upper projection 28 a located above the weakened portion 25 and a lower projection 28 b located below the weakened portion 25 .
The upper protrusion 28a protrudes forward from the front end of the outer circumferential surface of the pulling tube 27a and extends in the vertical direction. The lower end of the upper protrusion 28a is connected to the upper surface of the front end of the weakened portion 25. In other words, the breaking protrusion 28 is connected to the upper surface of the front end of the weakened portion 25. The lower portion of the upper protrusion 28a protrudes forward from the pulling tube 27a in a constant amount in the vertical direction. The upper portion of the upper protrusion 28a protrudes forward from the pulling tube 27a in a smaller amount toward the top.

The lower protrusion 28b protrudes forward from the front end of the outer peripheral surface of the closure plate 26. The lower protrusion 28b extends toward the left as it moves downward. The upper end of the lower protrusion 28b is connected to the underside of the front end of the weakened portion 25. In other words, the breaking protrusion 28 also has a portion that connects to the underside of the front end of the weakened portion 25. The amount that the lower protrusion 28b protrudes forward from the closure plate 26 increases as it moves upward.

As shown in Figures 6 and 7, in a plan view seen from the top and bottom direction, the center of the rupture protrusion 28 in the left-right direction is positioned at a position shifted in the left-right direction from the front-to-back center line L. In this embodiment, the center of the rupture protrusion 28 in the left-right direction is positioned at a position shifted to the left from the front-to-back center line L.

As shown in FIG. 7, in a plan view seen from the top and bottom direction, the protrusion 2e is located on the opposite side of the center of the breaking protrusion 28 in the left-right direction across the front-to-rear center line L, and faces the breaking protrusion 28 via the weakened portion 25. In this embodiment, the protrusion 2e is located below the weakened portion 25, and faces the lower protrusion portion 28b of the breaking protrusion 28 in the left-right direction with a gap corresponding to the width dimension of the weakened portion 25.

As shown in FIG. 6, the breaking projection 28 has a flat portion 28c extending parallel to the front-rear center line L and an inclined portion 28d extending at an angle relative to the front-rear center line L in a top-bottom plan view.
As shown in Figures 4 and 5, the flat portion 28c is disposed on the right side surface of the breaking protrusion 28 and extends in the up-down direction. The flat portion 28c is flat and faces rightward. The flat portion 28c is disposed on at least the upper protrusion portion 28a of the breaking protrusion 28. The lower end portion of the flat portion 28c is connected to the upper surface of a portion of the weakened portion 25 adjacent to the right side of the breaking protrusion 28. In the plan view shown in Figure 6, the flat portion 28c is located on the front-rear center line L in this embodiment.

As shown in Figures 4 and 5, the inclined portion 28d is disposed on the left side surface of the breaking protrusion 28 and extends in the vertical direction. The inclined portion 28d is flat and faces leftward and forward. The inclined portion 28d is disposed on at least the upper protrusion portion 28a of the breaking protrusion 28. The lower end of the inclined portion 28d is connected to the upper surface of the portion of the weakened portion 25 adjacent to the left side of the breaking protrusion 28. In the plan view shown in Figure 6, the inclined portion 28d extends toward the left as it moves toward the rear.

As shown in FIG. 6, in a plan view from the top and bottom, the angle θ formed between the inclined portion 28d and the flat portion 28c of the breaking protrusion 28 is, for example, less than 60°, preferably 40° or less, and in this embodiment, is approximately 35°.

As shown in Figures 2 and 3, the weakened portion 25 connects the outer periphery of the closure 24 and the inner periphery of the cap top wall 2b, and is breakable. In this embodiment, the weakened portion 25 is generally rhombus-shaped in a plan view. The front end of the weakened portion 25 has a pointed shape that is convex toward the front. The portion of the front end of the weakened portion 25 adjacent to the breaking protrusion 28 becomes the starting point when the weakened portion 25 begins to break. For this reason, in this embodiment, the above portion of the weakened portion 25 may be referred to as the starting point portion.

As shown in FIG. 1, the lid body 3 is disposed on the upper side of the cap body 2. The lid body 3 covers the cap top wall 2b, the pouring tube portion 22, the locking rib 23, the closure body 24, the weakened portion 25, and the pouring outlet 2c of the cap body 2 from above and from the radially outer side.

The lid body 3 has a lid peripheral wall 3a, a lid top wall 3b, a locking recess 3c, and an operating portion 3d.
The lid peripheral wall 3a has a cylindrical shape with the cap axis O as its center.
The lid top wall 3b is in the shape of a disk centered on the cap axis O. The outer periphery of the lid top wall 3b is connected to the upper end of the lid peripheral wall 3a.

The locking recess 3c is disposed at the lower end of the lid peripheral wall 3a. The locking recess 3c is recessed radially outward from the inner peripheral surface of the lid peripheral wall 3a and extends around the entire circumference. The locking protrusion 23a of the locking rib 23 is removably locked into the locking recess 3c. Specifically, when the lid 3 is closed as shown in FIG. 1, the front end of the locking recess 3c and the locking protrusion 23a are locked by undercut fitting.

The operating portion 3d protrudes forward from the front end of the lower end of the lid peripheral wall 3a and extends in the circumferential direction. The operating portion 3d is grasped by the user when the user opens and closes the lid body 3.

The lid body 3 also has a sealing tube portion 31, a surrounding wall portion 32, a support wall portion 33, a hole portion 34, and a plug removal portion 35.

The sealing tube portion 31 is suspended downward from the lid top wall 3b. The sealing tube portion 31 is generally cylindrical with the cap axis O at its center. The height (protruding dimension) of the sealing tube portion 31 protruding downward from the lid top wall 3b increases from the front end to the rear end of the sealing tube portion 31. In other words, the lower end opening edge of the sealing tube portion 31 is located lower from the front end to the rear side of the sealing tube portion 31. The sealing tube portion 31 fits liquid-tightly into the pouring tube portion 22. After the cap is opened, the lid body 3 is closed and the sealing tube portion 31 fits into the pouring tube portion 22, preventing the contents from leaking out of the pouring tube portion 22 from the pouring outlet 2c.

The surrounding wall portion 32 is suspended downward from the lid top wall 3b. The surrounding wall portion 32 is positioned forward of the cap axis O. The surrounding wall portion 32 is a curved wall portion that extends in the circumferential direction of the pulling axis C as the center. The surrounding wall portion 32 surrounds the upper end portion of the pulling tube 27a from the outside in the radial direction of the pulling axis. Specifically, the surrounding wall portion 32 surrounds the upper end portion of the pulling tube 27a from the left, right, and rear sides. When viewed from the top-bottom direction as shown in FIG. 2, the surrounding wall portion 32 is substantially C-shaped and opens toward the front.

The surrounding wall portion 32 has a vertical groove 32a. The vertical groove 32a is disposed at the rear end of the surrounding wall portion 32. The vertical groove 32a is recessed upward from the lower end surface of the surrounding wall portion 32 and extends in the front-rear direction. As shown in FIG. 1, when the lid body 3 is in the closed state, the upper end of the vertical rib 27c is inserted into the vertical groove 32a. This restricts the movement of the lifting portion 27 in the left-right direction relative to the surrounding wall portion 32.

The support wall 33 is suspended downward from the lid top wall 3b. As shown in FIG. 2, the support wall 33 is disposed rearward of the surrounding wall 32. When viewed from the top-bottom direction, the support wall 33 is generally V-shaped and opens toward the front. As shown in FIG. 1, the lower end of the support wall 33 contacts the outer peripheral rib 26a of the closure plate 26 from above. This allows the support wall 33 to support the closure plate 26 before and after the cap is opened. In addition, after the lid is opened (when the weakened portion 25 is broken and the closure 24 has moved toward the lid 3), the liquid content (contents) is unlikely to enter the space surrounded by the support wall 33, the closure 24, and the lid top wall 3b when the lid is closed.

The hole 34 passes through the lid top wall 3b in the vertical direction. The hole 34 is a multi-stage circular hole centered on the pulling axis C. The hole 34 has a large diameter portion 34a that opens on the upper surface of the lid top wall 3b and a small diameter portion 34b that opens on the lower surface of the lid top wall 3b and has an inner diameter smaller than that of the large diameter portion 34a.
The upper end of the pulling tube 27a fits into the small diameter portion 34b.

The uncorking portion 35 is a multi-stage cylindrical shape centered on the pull-up axis C. The uncorking portion 35 is separate from the lid body 3 other than the uncorking portion 35. Specifically, in this embodiment, the lid body 3 other than the uncorking portion 35, the cap body 2, and the hinge 4 are integrally formed from low-density polyethylene such as LLDPE or LDPE. The uncorking portion 35 is formed from, for example, polyethylene terephthalate (PET), polyacetal (POM), polypropylene (PP), or the like. The uncorking portion 35 is preferably made of a harder material than the lid body 3 other than the uncorking portion 35, the cap body 2, and the hinge 4, but may be made of the same material.

The unplug portion 35 has a disk portion 35a and a shaft portion 35b.
The disk portion 35a is disk-shaped and centered on the pulling axis C. The disk portion 35a fits into the large diameter portion 34a. Specifically, the outer periphery of the disk portion 35a and the inner periphery of the large diameter portion 34a fit liquid-tightly. This prevents the contents from leaking out of the cap through the gap between the plug removal portion 35 and the hole portion 34 from the spout 2c after the cap is opened. In the illustrated example, the upper opening edge of the pulling tube 27a contacts the lower surface of the disk portion 35a.

The shaft portion 35b is axially shaped and centered on the lifting axis C, and extends downward from the underside of the disk portion 35a. The shaft portion 35b has a smaller outer diameter and a larger vertical dimension than the disk portion 35a. The shaft portion 35b passes through the small diameter portion 34b and protrudes below the lid top wall 3b. In other words, the uncorking portion 35 protrudes downward from the lid top wall 3b.

The shaft portion 35b fits into the lifting tube 27a in a non-removable state by undercut fitting or the like. In other words, the plug removal portion 35 is locked in a non-removable state with respect to the lifting portion 27. In the illustrated example, the lower end surface of the shaft portion 35b contacts the upper surface of the partition wall 27b or faces it with a gap therebetween.

The hinge 4 connects the lid body 3 to the cap body 2 so that the lid body 3 can be opened and closed. Specifically, the hinge 4 connects the rear end of the upper end of the cap peripheral wall 2a to the rear end of the lower end of the lid peripheral wall 3a so that they can rotate relative to each other.

In the hinge cap 1 of this embodiment described above, when the lid body 3 is rotated in the opening direction around the hinge 4 relative to the cap body 2, the uncorking portion 35 of the lid body 3 pulls the lifting portion 27 upward (upward toward the rear). At this time, a lifting force is concentrated from the breaking protrusion 28 on the front side of the lifting portion 27 to the starting point of the weakened portion 25 adjacent to the breaking protrusion 28, and the weakened portion 25 begins to break from this starting point. By further opening the lid body 3, the blocking body 24 is separated from the cap top wall 2b, and the spout 2c is opened. According to this embodiment, the spout 2c can be opened by the simple operation of rotating the lid body 3 around the hinge 4, improving operability when opening the cap.

In this embodiment, as shown in Figures 6 and 7, the center of the rupture protrusion 28 in the left-right direction is positioned at a position offset in the left-right direction from the front-to-rear center line L in a plan view seen from the top-to-bottom direction, so that stress can be concentrated more efficiently from the rupture protrusion 28 to the starting point of the weakened portion 25. Therefore, when the lid 3 is opened to open the spout 2c, the weakened portion 25 can begin to break with less force. This improves operability when opening the container.

In addition, in this embodiment, in addition to a portion (upper protrusion 28a) that connects to the upper surface of the front end portion of the weakened portion 25, the breaking protrusion 28 also has a portion (lower protrusion 28b) that connects to the lower surface of the front end portion of the weakened portion 25.
In this case, the breaking protrusions 28 connected to the upper and lower surfaces of the front end portion of the weakened portion 25 allow stress to be efficiently concentrated on the weakened portion 25. The weakened portion 25 can be started to break with less force, and the operability when opening the package is improved.

7, the protrusion 2e disposed on the inner periphery of the cap top wall 2b and the central portion of the breaking protrusion 28 in the left-right direction are located on opposite sides of the front-rear center line L. The protrusion 2e and the breaking protrusion 28 face each other in the left-right direction via the weakened portion 25.
In this case, it is possible to concentrate stress more easily at the starting point located between the breaking protrusion 28 and the protruding portion 2 e of the weakened portion 25. The weakened portion 25 can start to break with less force, and the operability at the time of opening is further improved.

In this embodiment, the breaking projection 28 has a flat portion 28c extending parallel to the front-rear center line L in the plan view shown in FIG.
In this case, the breaking protrusion 28 can be made sharp toward the front, and when the lid body 3 is opened, the weakened portion 25 can be more easily broken along the flat portion 28c that is linear in plan view and extends in the front-to-rear direction.
In addition, when the inventors of the present invention confirmed by analysis, the breaking strength of the weakened portion 25 when opened was 28 N when the angle θ was 60°, and was 23 N when the angle θ was 35°.

In this embodiment, as shown in FIG. 1, the closure plate portion 26 extends downward as it moves toward the front side.
In this case, since the front end of the closure plate portion 26 is inclined toward the downward front side, when the cap is opened, the closure plate portion 26 is pulled up toward the upward rear side via the lifting portion 27, making it easier for the weakened portion 25 to break from the front end of the closure plate portion 26.

The present invention is not limited to the above-described embodiment, and the configuration may be modified without departing from the spirit of the present invention, for example as described below.

In the above embodiment, an example was given in which the cap peripheral wall 2a of the cap body 2 is attached to the mouth of the container body (not shown) by undercut fitting, but this is not limited thereto, and the cap peripheral wall 2a may be attached, for example, by screwing.

In the above embodiment, an example has been given in which the flat portion 28c is located on the front-rear center line L in the plan view shown in Fig. 6, but this is not limiting. In this plan view, the flat portion 28c may be spaced to the left of the front-rear center line L. In other words, the entire breaking projection 28 may be disposed spaced apart from the front-rear center line L in the left-right direction.
In addition, in this plan view, the flat portion 28c may be located slightly to the right of the front-rear center line L. In other words, the breaking protrusion 28 and the front-rear center line L may overlap in a plan view seen from the top-bottom direction.

In addition, in the above-described embodiment, an example was given in which the flat portion 28c and the inclined portion 28d are arranged on the portion of the breaking protrusion 28 that is located above the weakened portion 25 (upper protrusion 28a), but they may also be arranged on the portion that is located below the weakened portion 25 (lower protrusion 28b).

In addition, in the above embodiment, an example was given in which the protrusion 2e of the cap top wall 2b is disposed below the weakened portion 25, but this is not limited thereto. The protrusion 2e may be disposed above the weakened portion 25, or may be disposed both above and below the weakened portion 25.

In addition, in the above embodiment, an example was given in which, in the plan view shown in FIG. 7, the center in the left-right direction of the breaking protrusion 28 is disposed to the left of the front-to-rear center line L, and the protrusion 2e is disposed to the right of the front-to-rear center line L, but this is not limited thereto. In other words, the center in the left-right direction of the breaking protrusion 28 may be disposed to the right of the front-to-rear center line L, and the protrusion 2e may be disposed to the left of the front-to-rear center line L.

In the above embodiment, the unplug part 35 is fixed to the hole 34 by fitting, but this is not limited thereto and the unplug part 35 may be joined to the hole 34 by welding, for example. In addition, the example in which the unplug part 35 is separate from the portion of the lid 3 other than the unplug part 35 has been given, but this is not limited thereto and the unplug part 35 may be integrated with the hole 34.
Furthermore, the materials of the components of the hinge cap 1 are not limited to those described in the above embodiment.

In addition, the components in the above-described embodiments may be replaced with well-known components as appropriate without departing from the spirit of the present invention, and the above-described embodiments and variations may be combined as appropriate.

1... hinge cap, 2... cap body, 2b... cap top wall, 2c... spout, 2e... convex portion, 3... lid body, 3b... lid top wall, 4... hinge, 24... closure body, 25... weakened portion, 26... closure plate portion, 27... lifting portion, 28... breaking protrusion, 28c... flat portion, 35... uncorking portion, L... front-rear center line, O... cap axis

Claims (5)

A cap body having a cylindrical shape with a top that is attached to the mouth of a container body in which contents are contained;
A cylindrical lid body with a top is disposed on the upper side of the cap body;
a hinge that connects the lid body to the cap body so as to be openable and closable;
In a plan view seen from the top-bottom direction, a virtual line passing through the circumferential center of the hinge and the cap shaft and extending in the front-rear direction is defined as a front-rear center line,
The cap body includes:
an annular cap top wall having a spout;
A plug for blocking the pouring outlet;
a breakable weakened portion connecting an outer periphery of the closure and an inner periphery of the cap top wall,
The occlusion body is
A closure plate portion;
A lifting portion protruding upward from a front end portion of the closure plate portion;
a breaking protrusion protruding forward from the lifting portion and connected to an upper surface of a front end portion of the weakened portion,
The lid body has a plug removal portion that protrudes downward from the lid top wall and is engaged with the lifting portion,
In a plan view seen from the top and bottom direction, a central portion of the rupture protrusion in the left-right direction is disposed at a position shifted in the left-right direction from the front-rear center line.
Hinge cap. The breaking projection further has a portion connected to a lower surface of the front end portion of the weakened portion.
The hinge cap of claim 1 . the cap top wall has a protrusion disposed on an inner periphery of the cap top wall,
The protrusion is located on the opposite side of the center of the breaking protrusion in the left-right direction across the front-rear center line in a plan view seen from the up-down direction, and faces the breaking protrusion via the weakened portion.
The hinge cap according to claim 1 or 2. The breaking projection has a flat portion extending parallel to the front-rear center line in a plan view seen from the top-bottom direction.
The hinge cap according to any one of claims 1 to 3. The closure plate portion extends downward as it moves toward the front side.
The hinge cap according to any one of claims 1 to 4.

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