JP7479076B1 - container - Google Patents

Abstract

[Problem] To provide a container that allows identification of the opened state without leaving a ring. [Solution] A container according to one embodiment comprises a container body having a cylindrical mouth extending in the axial direction, and a cap that is detachably attached to the mouth, the cap including a top wall that covers the mouth from above and a side wall that surrounds the mouth from the side, the mouth having a protrusion that protrudes radially outward, the side wall having a stepped surface that comes into contact with the protrusion when the cap is rotated in one circumferential direction relative to the mouth, and a fragile portion that breaks along the stepped surface when the protrusion presses the stepped surface and the side wall elastically deforms. [Selected Figure] Figure 6

Description

This disclosure relates to a container.

Containers with removable caps are widely used. For example, the following Patent Document 1 describes a bottle container that includes a bottle container body, a cap that is attached to the mouth of the bottle container, and a tamper-evident ring that is attached to the bottom end of the cap via a connecting piece. When the cap is twisted to open it, the connecting piece breaks and the cap is opened. With this bottle container, it is possible to identify that the bottle container is unopened by confirming that the connecting piece has not been broken.

JP 2009-280236 A

In the container described in Patent Document 1, when the bottle is opened, the connecting piece breaks and the tamper-evident ring remains on the container body. If this type of ring remains on the container body, a process of removing the ring from the container body is required when recycling the container body, which increases the number of recycling steps.

Therefore, the present disclosure aims to provide a container that allows the opened state to be identified without leaving a ring.

The container according to one embodiment comprises a container body having a cylindrical mouth portion extending in the axial direction, and a cap that is removably attached to the mouth portion and includes a top wall portion that covers the mouth portion from above and a side wall portion that surrounds the mouth portion from the side, the mouth portion having a protrusion that protrudes radially outward, and the side wall portion having a step surface that contacts the protrusion when the cap is rotated in one circumferential direction relative to the mouth portion, and a fragile portion that breaks along the step surface when the step surface is pressed by the protrusion portion and the side wall portion elastically deforms.

When the cap of the container according to the above embodiment is rotated, the step surface of the cap is pressed against the protrusion, causing the side wall to elastically deform. At this time, the fragile portion breaks along the step surface, and the cap is opened. Therefore, by checking whether the fragile portion of the cap has broken, it is possible to identify whether the container has been opened.

In one embodiment, the side wall portion includes a plurality of separation pieces connected in the circumferential direction, and the thickness of each of the plurality of separation pieces becomes thinner from one end side to the other end side in the circumferential direction, and the end face on the one end side of each of the plurality of separation pieces may form a step surface. In this embodiment, when the step surface is pressed by the protrusion portion, the side wall portion elastically deforms and becomes easily broken along the step surface.

In one embodiment, the protrusion has a contact surface that contacts the step surface, and the step surface may be inclined relative to the contact surface. By inclining the step surface relative to the contact surface, a force is more likely to act on the fragile portion when the side wall portion elastically deforms. Therefore, the fragile portion can be reliably broken.

In one embodiment, the side wall portion is provided closer to the top wall portion than the step surface and has a mating protrusion protruding radially inward, and the outer peripheral surface of the mouth portion may be provided with a first guide groove extending in the axial direction between the set position and the closed position and guiding the mating protrusion from the set position to the closed position when a force is applied to the cap in the insertion direction along the axial direction, a second guide groove extending between the closed position and an open position offset in the circumferential direction from the closed position and guiding the mating protrusion from the closed position to the open position when the cap is rotated in one circumferential direction relative to the mouth portion, and a pull-out restricting portion provided between the set position and the closed position, which allows the mating protrusion to move from the set position to the closed position and restricts the mating protrusion from the closed position to the set position. When a force is applied to the cap in the insertion direction, the mating protrusion of the cap is guided from the set position to the closed position along the first guide groove, and the cap is closed. At this time, the pull-out restricting portion restricts the mating protrusion from moving from the closed position to the set position, thereby preventing the cap from being unintentionally pulled out. On the other hand, when the cap is rotated in one circumferential direction, the fitting protrusion of the cap is guided along the second guide groove from the closed position to the open position, and the cap is opened.

In one embodiment, the depth of the second guide groove may become shallower as it approaches the open position from the closed position. By making the depth of the second guide groove shallower as it approaches the open position, when the mating protrusion reaches the open position, the mating protrusion disengages from the second guide groove, and the cap is opened.

In one embodiment, the mouth portion may further have a guide surface that guides the mating protrusion to the set position. By having a guide surface that guides the mating protrusion to the set position, the mating protrusion can be easily moved to the guide position when a force is applied to the cap in the insertion direction. This makes it possible to easily attach the cap.

Various aspects of the present invention make it possible to identify whether the container body has been opened without leaving the ring on the container body.

FIG. 2 is a side view of a container according to one embodiment. FIG. 2 is a perspective view of the container, showing the container body and the cap separated from each other. FIG. FIG. FIG. 2 is a side view of the mouth of the bottle body. 2 is a cross-sectional view of the container taken along line AA in FIG. 1. 11A to 11C are diagrams illustrating a procedure for opening a container. 13A and 13B are diagrams illustrating the movement of the fitting protrusion when the cap is removed. 13A and 13B are diagrams illustrating the movement of a fitting protrusion when the cap is attached.

Embodiments of the present disclosure will now be described with reference to the drawings. In the following description, identical or equivalent elements will be given the same reference numerals, and redundant description will not be repeated. The dimensional ratios in the drawings do not necessarily match those in the description.

Figure 1 is a side view showing a container 1 according to one embodiment. As shown in Figure 1, the container 1 comprises a container body 2 and a cap 3 that is removably attached to the container body 2. The container body 2 contains contents such as beverages, jelly, ice cream, etc. In the following description, a person who uses the container 1 is referred to as a "user." Typically, the user is a consumer who consumes the contents of the container body 2.

Figure 2 is a perspective view showing the container body 2 and the cap 3 separated. As shown in Figure 2, the container body 2 has a mouth portion 4. The mouth portion 4 is provided on the upper part of the container body 2 and is used as a drinking opening for the contents contained in the container body 2. The mouth portion 4 is, for example, a resin spout. The mouth portion 4 has a cylindrical shape with the axis line AX as its central axis and extends in a direction along the axis line AX (hereinafter referred to as the "axial direction"). The mouth portion 4 has a spout 5 for extracting the contents contained in the container body 2. The mouth portion 4 may be formed integrally with the container body 2, or may be attached to the container body 2 as a separate body.

The cap 3 is configured to be detachable from the mouth 4. When the cap 3 is attached to the mouth 4, it closes the spout 5, preventing the contents from leaking out of the spout 5 of the container body 2. On the other hand, when the cap 3 is removed from the mouth 4, the contents can be poured out of the container body 2.

Figure 3 is a side view of the cap 3 according to one embodiment. Figure 4 is a perspective view of the cap 3 from below. As shown in Figure 3, the cap 3 has a top wall portion 7 and a side wall portion 8. The top wall portion 7 is disk-shaped, and when the cap 3 is attached to the mouth portion 4, it covers the mouth portion 4 from above and closes the spout 5. The side wall portion 8 is cylindrical with the axis CL as its central axis, and is connected to the periphery of the top wall portion 7. When the cap 3 is attached to the mouth portion 4 so that the axis CL of the cap 3 coincides with the axis AX of the container body 2, the side wall portion 8 surrounds the mouth portion 4 from the side and engages with the mouth portion 4. The top wall portion 7 and the side wall portion 8 are integrally molded from a resin material.

The sidewall portion 8 has a lower sidewall portion 10 and an upper sidewall portion 11. The lower sidewall portion 10 and the upper sidewall portion 11 are integrally formed. As shown in FIG. 4, the lower sidewall portion 10 has a generally annular shape extending around the axis line CL of the sidewall portion 8, and includes a number of separation pieces 12 connected in the circumferential direction of the cap 3. In the embodiment shown in FIG. 4, four separation pieces 12 are connected in the circumferential direction to form the generally annular lower sidewall portion 10. Each of the multiple separation pieces 12 has one end 12a and the other end 12b, and extends in the circumferential direction around the axis line CL between the one end 12a and the other end 12b.

The thickness of each of the multiple separation pieces 12 gradually decreases from the one end 12a side to the other end 12b side in the circumferential direction. The radial distance of the cap 3 from the axis CL to the outer circumferential surface of the side wall lower part 10 is constant in the circumferential direction. On the other hand, in the radial direction of the side wall part 8, the distance between the axis CL and one end 12a of the separation piece 12 is smaller than the distance between the axis CL and the other end 12b of the separation piece 12. One end 12a of one of the multiple separation pieces 12 is connected to the other end 12b of the separation piece 12 adjacent to that one of the multiple separation pieces 12. By connecting the multiple separation pieces 12 as described above, a step surface 13 is formed between the one end 12a of one separation piece 12 and the other end 12b of the separation piece 12 adjacent to that one separation piece 12. In other words, the end face on the one end 12a side of the separation piece 12 constitutes the step surface 13. As shown in FIG. 4, the step surface 13 is disposed inside the side wall portion 8 and faces in the circumferential direction of the side wall portion 8.

The other end 12b of the separation piece 12 has the smallest thickness. Therefore, the other end 12b of the separation piece 12 constitutes a weak portion 14 that is weaker than other portions of the separation piece 12. It can also be said that the weak portion 14 is located at the boundary between multiple separation pieces 12. The weak portion 14 is formed along the step surface 13, and serves as the starting point for opening the cap 3.

The upper sidewall 11 is disposed closer to the top wall 7 than the lower sidewall 10. The upper sidewall 11 includes a base 15, a flange 16, and a mating protrusion 17. The base 15 is cylindrical with the axis CL as its central axis. The outer diameter of the base 15 may be smaller than the outer diameter of the lower sidewall 10. The upper end of the base 15 is connected to the top wall 7, and the lower end of the base 15 is connected to the lower sidewall 10. The flange 16 protrudes radially outward from the outer circumferential surface of the base 21.

The mating protrusions 17 are provided closer to the top wall 7 than the step surface 13, and protrude radially inward from the inner peripheral surface of the base 15. In the embodiment shown in FIG. 4, the side wall upper portion 11 is provided with a plurality of mating protrusions 17 arranged along the circumferential direction of the cap 3. The mating protrusions 17 have an upper surface 18 formed along a plane substantially perpendicular to the axis CL, and an inclined surface 19 that inclines so as to be positioned radially outward as it moves downward from the upper surface 18 (in the direction away from the top wall 7). The mating protrusions 17 cooperate with a pull-out restriction portion 35 (described later) formed in the mouth portion 4 to restrict the pull-out of the cap 3.

Figure 5 is a side view of the mouth portion 4 according to one embodiment. The mouth portion 4 has a lower tube portion 20 and an upper tube portion 30. In the following description, the direction from the lower tube portion 20 toward the upper tube portion 30 is referred to as "upward," and the direction from the upper tube portion 30 toward the lower tube portion 20 is referred to as "downward." As shown in Figure 5, the lower tube portion 20 has a base portion 21 that is substantially cylindrical with the axis AX as its central axis, and a protrusion portion 22 that protrudes radially outward from the outer circumferential surface of the base portion 21. In the embodiment shown in Figure 5, the lower tube portion 20 has a plurality of protrusion portions 22 arranged in the circumferential direction of the mouth portion 4.

Figure 6 is a cross-sectional view of the container 1 taken along line A-A in Figure 1. As shown in Figure 6, when the cap 3 is rotated in one circumferential direction of the axis AX relative to the mouth 4 (counterclockwise in Figure 6; hereinafter referred to as the "opening direction"), the multiple step surfaces 13 of the cap 3 come into contact with the multiple protrusions 22. Each of the multiple protrusions 22 is oriented in the circumferential direction of the mouth 4 and has a contact surface 23 that comes into contact with the step surface 13. When the cap 3 is rotated in the opening direction, the multiple protrusions 22 come into contact with the step surface 13 of the cap 3 to prevent unintentional opening of the cap 3. Note that, as shown in Figure 6, the step surface 13 of the cap 3 may be inclined with respect to the contact surface 23 of the protrusion 22.

As shown in FIG. 5, the upper tube portion 30 is disposed closer to the spout 5 than the lower tube portion 20 in the axial direction. The upper tube portion 30 has a base portion 31 having a cylindrical shape with the axis AX as its central axis, and a guide portion 32 provided on the outer peripheral surface of the base portion 31. The guide portion 32 protrudes from the outer peripheral surface of the base portion 31 in the radial direction of the spout portion 4. The guide portion 32 guides the fitting protrusion 17 of the cap 3 so that the cap 3 can be smoothly attached and detached.

As shown in FIG. 5, the guide portion 32 has a plurality of first guide grooves 33, a plurality of second guide grooves 34, and a plurality of pull-out restricting portions 35. The plurality of first guide grooves 33, the plurality of second guide grooves 34, and the plurality of pull-out restricting portions 35 are arranged in the circumferential direction of the mouth portion 4. The plurality of first guide grooves 33, the plurality of second guide grooves 34, and the plurality of pull-out restricting portions 35 are formed at positions corresponding to the positions of the plurality of fitting protrusions 17. Note that it is sufficient for the guide portion 32 to have at least one each of the first guide groove 33, the second guide groove 34, and the pull-out restricting portion 35.

The first guide groove 33 is recessed radially inward from the outer peripheral surface of the guide portion 32. The bottom surface of the first guide groove 33 is flush with the base portion 31. The first guide groove 33 extends in the axial direction between the set position P1 and the closed position P2. The set position P1 is the position where the fitting protrusion 17 of the cap 3 is set when the cap 3 is attached to the mouth portion 4. The closed position P2 is located below the set position P1. When the fitting protrusion 17 of the cap 3 is located in the closed position P2, the top wall portion 7 of the cap 3 covers the mouth portion 4 from above, and the spout 5 is closed. When the container 1 is unopened, the fitting protrusion 17 of the cap 3 is located in the closed position P2.

The second guide groove 34 is recessed radially inward from the outer circumferential surface of the guide portion 32. The bottom surface of the second guide groove 34 is flush with the bottom surface of the first guide groove 33. The second guide groove 34 extends between the closed position P2 and the open position P3. The open position P3 is disposed above the closed position P2 and at a position offset (displaced) from the closed position P2 in the circumferential direction of the mouth portion 4. That is, the second guide groove 34 extends obliquely upward. When the fitting protrusion 17 of the cap 3 is disposed in the open position P3, the cap 3 is removed from the mouth portion 4.

When the cap 3 is rotated in the opening direction relative to the mouth 4, the second guide groove 34 guides the fitting protrusion 17 from the closed position P2 to the open position P3. The depth of the second guide groove 34 (the distance from the outer peripheral surface of the guide portion 32 to the bottom surface of the second guide groove 34 in the radial direction of the mouth 4) becomes shallower as it approaches the open position P3 from the closed position P2. When the fitting protrusion 17 of the cap 3 is placed in the open position P3, the fitting protrusion 17 and the second guide groove 34 are released from each other, and the cap 3 is removed from the mouth 4. In addition, in the circumferential direction of the mouth 4, the open position P3 may be offset from the closed position P2 by an angle of 180° or less, 90° or less, or 45° or less. In this case, the cap 3 can be removed from the mouth 4 by rotating the cap 3 in the opening direction by a small rotation angle of 180° or less.

The pull-out restricting portion 35 is provided between the set position P1 and the closed position P2, and protrudes radially outward from the bottom surface of the first guide groove 33. The pull-out restricting portion 35 has an inclined surface 36 that inclines downward so as to be positioned radially outward, and a lower surface 37 that is connected to the lower end of the inclined surface 36 and extends along a plane substantially perpendicular to the axis AX.

When the fitting protrusion 17 of the cap 3 is disposed in the closed position P2, the lower surface 37 of the pull-out restricting portion 35 is disposed facing the upper surface 18 of the fitting protrusion 17. Therefore, when an upward pulling force is applied to the cap 3, the upper surface 18 of the fitting protrusion 17 comes into contact with the lower surface 37 of the pull-out restricting portion 35, and the movement of the fitting protrusion 17 from the closed position P2 to the set position P1 is restricted. On the other hand, when a downward (insertion direction) inserting force is applied to the cap 3 with the fitting protrusion 17 of the cap 3 disposed in the set position P1, the inclined surface 19 of the fitting protrusion 17 slides against the inclined surface 36 of the pull-out restricting portion 35, and the fitting protrusion 17 moves over the pull-out restricting portion 35 to the closed position P2. In other words, the pull-out restricting portion 35 allows the fitting protrusion 17 to move from the set position P1 to the closed position P2, and restricts the movement of the fitting protrusion 17 from the closed position P2 to the set position P1.

The guide portion 32 may further have a guide surface 38. As shown in FIG. 5, the guide surface 38 has a mountain shape with a top 41 and a bottom 42 in a side view, and is inclined downward as it approaches the bottom 42 from the top 41. The bottom 42 is adjacent to the set position P1. The guide surface 38 guides the fitting protrusion 17 to the set position P1 when the cap 3 is attached to the mouth portion 4.

The procedure for opening an unopened container 1 will be described below with reference to Figures 7(a) to (c). As described above, the step surface 13 of the cap 3 is formed in a position that contacts the protrusion 22 of the mouth 4 when the cap 3 is rotated in the opening direction. Therefore, when a user twists the cap 3 in the opening direction to open the container 1, as shown in Figure 7(a), the step surface 13 of the cap 3 contacts the contact surface 23 of the protrusion 22 of the mouth 4. At this time, the step surface 13 of the cap 3 is inclined with respect to the contact surface 23 of the protrusion 22.

When the user strongly twists the cap 3 in the opening direction while the step surface 13 of the cap 3 is in contact with the protrusion 22 of the mouth 4, the step surface 13 is pressed against the contact surface 23. As a result, the multiple separation pieces 12 are elastically deformed so that the step surface 13 approaches parallel to the contact surface 23, as shown in FIG. 7(b). At this time, bending stress is concentrated in the thin fragile portion 14, and the side wall lower portion 10 is bent from the fragile portion 14. When the user further strongly twists the cap 3 in the opening direction, the multiple separation pieces 12 are further elastically deformed so that the step surface 13 is in close contact with the contact surface 23, as shown in FIG. 7(c). As a result, the side wall lower portion 10 is further bent from the fragile portion 14, and the fragile portion 14 is broken along the step surface 13. As a result, the multiple separation pieces 12 are separated from each other.

When the multiple separation pieces 12 are separated from one another, a slit is formed in the lower part 10 of the side wall of the cap 3, extending in the axial direction along the step surface 13. By visually checking this slit, the user can identify that the container 1 has been opened.

After the fragile portion 14 is opened, when the user further twists the cap 3 in the opening direction, the multiple separation pieces 12 climb over the protrusions 22 of the mouth portion 4, and the cap 3 rotates in the opening direction. In other words, the fragile portion 14 is broken, allowing the cap 3 to rotate in the opening direction.

As shown in FIG. 8, when the cap 3 is rotated in the opening direction, the fitting protrusion 17 of the cap 3 arranged in the closed position P2 moves along the second guide groove 34 to the open position P3 (see arrow D1 in FIG. 8). The depth of the second guide groove 34 becomes shallower as it approaches the open position P3 from the closed position P2, so when the fitting protrusion 17 reaches the open position P3, the fitting protrusion 17 and the second guide groove 34 are released from each other, the cap 3 is removed from the opening 4, and the spout 5 is opened.

On the other hand, when attaching the removed cap 3 to the mouth 4, as shown in FIG. 9, the cap 3 is placed over the mouth 4, and the fitting protrusion 17 is pressed against the guide surface 38 of the mouth 4. When the user presses the cap 3 downward in this state, the fitting protrusion 17 slides along the guide surface 38 from the top 41 to the bottom 42, and the fitting protrusion 17 is guided to the set position P1 (see arrow D2 in FIG. 9).

When the user presses the cap 3 downward with the mating protrusion 17 in the set position P1, the mating protrusion 17 is guided along the first guide groove 33 (see arrow D3 in FIG. 9). At this time, the inclined surface 19 of the mating protrusion 17 slides against the inclined surface 36 of the pull-out restricting portion 35, and the mating protrusion 17 climbs over the pull-out restricting portion 35. This moves the mating protrusion 17 of the cap 3 from the set position P1 to the closed position P2. As a result, the cap 3 is attached to the mouth 4, and the spout 5 is closed.

On the other hand, if an upward force acts on the cap 3 when the mating protrusion 17 is in the closed position P2, the upper surface 18 of the mating protrusion 17 comes into contact with the lower surface 37 of the pull-out restriction portion 35, restricting the cap 3 from being pulled out. This prevents the cap 3 from being pulled out unintentionally.

As described above, in the container 1 according to one embodiment, when the cap 3 is rotated, the step surface 13 of the cap 3 is pressed against the protrusion 22, and the side wall 8 is elastically deformed. At this time, the fragile portion 14 is broken along the step surface 13, and the cap 3 is opened. Therefore, it is possible to identify whether the container 1 is unopened or not by checking whether the fragile portion 14 of the cap 3 is broken or not, without leaving a ring on the container body 2.

When the cap 3 is further twisted in the opening direction after the fragile portion 14 has been opened, the multiple separation pieces 12 climb over the protrusions 22 on the mouth portion 4, and the cap 3 rotates in the opening direction. Here, a sound may be generated when the multiple separation pieces 12 climb over the protrusions 22. Therefore, when the cap is rotated several times to remove it from the mouth portion, a sound is generated each time the multiple separation pieces 12 climb over the protrusions 22, which may be annoying to the user. In contrast, in the container 1 according to one embodiment, the cap 3 can be removed by rotating the cap 3 in the opening direction by a small rotation angle, thereby reducing the inconvenience to the user. The cap 3 is a one-touch cap that can be opened with a small rotation angle.

Although containers according to various embodiments have been described above, various modifications can be made without being limited to the above-mentioned embodiments, without changing the gist of the invention. For example, in the above-mentioned embodiment, the cap 3 has multiple step surfaces 13 and fragile parts 14, and the mouth part 4 has multiple protrusions 22, but it is sufficient that there is at least one step surface 13, fragile part 14, and protrusion 22. The above-mentioned various embodiments can be combined to the extent that there are no contradictions.

The present invention will be described with reference to the provisions listed below. Note that the present invention may include any combination of the following provisions even if they are not specifically listed.

1. A container body having a cylindrical mouth portion extending in an axial direction;
A cap that is removably attached to the mouth portion, the cap including a top wall portion that covers the mouth portion from above and a side wall portion that surrounds the mouth portion from the sides;
Equipped with
The mouth portion has a protrusion protruding radially outward,
A container, wherein the side wall portion has a step surface that contacts the protrusion when the cap is rotated in one circumferential direction relative to the mouth portion, and a fragile portion that breaks along the step surface when the step surface is pressed against the protrusion and the side wall portion elastically deforms.

2. The side wall portion includes a plurality of separation pieces connected in the circumferential direction,
A thickness of each of the plurality of separation pieces becomes thinner from one end side to the other end side in the circumferential direction,
2. The container according to claim 1, wherein an end surface on the one end side of each of the plurality of separation pieces constitutes the step surface.

3. The protrusion has a contact surface that contacts the step surface,
3. The container of claim 1 or 2, wherein the step surface is inclined relative to the contact surface.

4. The side wall portion is provided closer to the top wall portion than the step surface and has a fitting protrusion protruding inward in the radial direction,
The container described in any one of clauses 1 to 3, wherein the outer peripheral surface of the mouth portion is formed with a first guide groove extending in the axial direction between a set position and a closed position and guiding the mating convex portion from the set position to the closed position when a force is applied to the cap in an insertion direction along the axial direction, a second guide groove extending between the closed position and an open position offset in the circumferential direction from the closed position and guiding the mating convex portion from the closed position to the open position when the cap is rotated in one direction in the circumferential direction relative to the mouth portion, and a pull-out restriction portion provided between the set position and the closed position for allowing movement of the mating convex portion from the set position to the closed position and restricting movement of the mating convex portion from the closed position to the set position.

5. The container described in clause 4, wherein the depth of the second guide groove becomes shallower as it approaches the open position from the closed position.

6. The container according to clause 4 or 5, wherein the mouth portion further has a guide surface that guides the fitting protrusion to the set position.

1...container, 3...cap, 4...mouth, 7...top wall, 8...side wall, 12...separation piece, 13...step surface, 14...weakened portion, 17...fitting protrusion, 22...projection, 23...contact surface, 33...first guide groove, 34...second guide groove, 35...withdrawal restriction portion, 38...guide surface, P1...set position, P2...closed position, P3...open position.

Claims (5)

A container body having a cylindrical mouth portion extending in an axial direction;
A cap that is removably attached to the mouth portion, the cap including a top wall portion that covers the mouth portion from above and a side wall portion that surrounds the mouth portion from the sides;
Equipped with
The mouth portion has a protrusion protruding radially outward,
the top wall portion and the side wall portion are integrally molded from a resin material,
the side wall portion has a side wall lower portion and a side wall upper portion disposed closer to the top wall portion than the side wall lower portion,
The side wall lower portion includes a plurality of separation pieces connected in a circumferential direction,
Each of the plurality of separation pieces has a step surface that is disposed at one end of the plurality of separation pieces in the circumferential direction and comes into contact with the protrusion when the cap is rotated relative to the mouth in an opening direction that is one of the circumferential directions, and a fragile portion that is disposed at the other end of the plurality of separation pieces in the circumferential direction and breaks along the step surface in the axial direction when the step surface is pressed against the protrusion and the side wall portion is elastically deformed , thereby separating the plurality of separation pieces in the circumferential direction ,
the protrusion has a contact surface that comes into contact with the step surface,
the step surface is inclined with respect to the contact surface ,
A container , wherein when the cap is rotated in the opening direction so that the plurality of separation pieces are separated in the circumferential direction, the plurality of separation pieces are connected to an upper portion of the side wall . The container according to claim 1 , wherein a wall thickness of each of the plurality of separation pieces becomes thinner from one end side to the other end side in the circumferential direction. the side wall portion is provided closer to the top wall portion than the step surface and has a fitting protrusion protruding inward in the radial direction,
2. The container according to claim 1, wherein the outer peripheral surface of the mouth portion is formed with a first guide groove extending in the axial direction between a set position and a closed position and guiding the mating convex portion from the set position to the closed position when a force is applied to the cap in an insertion direction along the axial direction, a second guide groove extending between the closed position and an open position offset in the circumferential direction from the closed position and guiding the mating convex portion from the closed position to the open position when the cap is rotated in one direction in the circumferential direction relative to the mouth portion, and a pull-out restriction portion provided between the set position and the closed position, which allows movement of the mating convex portion from the set position to the closed position and restricts movement of the mating convex portion from the closed position to the set position. The container according to claim 3, wherein the depth of the second guide groove becomes shallower as it approaches the open position from the closed position. The container according to claim 3 , wherein the mouth portion further comprises a guide surface that guides the fitting protrusion to the set position.

Images