Packaging container

Abstract

To provide a packaging container capable of easily opening a container body whose content is sealed, by rotating a cap.SOLUTION: A packaging container according to the present invention comprises a tube-like container body with both ends sealed, and a cap attached to one end of the container body. The cap comprises a top plate part, a peripheral wall part, a nozzle part, a piercing part having a tip-pointed conically shape that is connected to a central part of an inner face of the top plate part, and provided with a window part in communication with a hollow part of the nozzle part, and a protrusion provided on an inner face of the peripheral wall part. The container body comprises a thin wall part, and a groove part that stores the protrusion of the cap, for guiding the protrusion in accordance with rotation in a predetermined rotation direction of the cap. The tip of the piercing part of the cap is located on a rotation axis of the cap. The piercing part passes through the thin wall part in accordance with the rotation in the predetermined rotation direction of the cap. An inside of the container body and the hollow part of the nozzle part are communicated with each other through the window part.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a packaging container from which contents can be poured. [Background technology]

[0002] Patent Document 1 describes a storage container that can store a small amount of liquid, such as a medicinal solution, and from which the stored medicinal solution can be dripped. The storage container described in Patent Document 1 includes a container body with a closure plate at the top and a cap with a nozzle and a piercing tube. By turning the cap, the piercing tube in the cap breaks through the closure plate of the container body, connecting the nozzle of the cap to the inside of the container body. This allows the liquid in the container body to drip from the tip of the nozzle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-128332 Summary of the Invention [Problem to be solved by the invention]

[0004] In the storage container described in Patent Document 1, a blade with two pointed blade surfaces is provided at the lower end of a piercing tube provided inside the cap. When this blade cuts through the closure plate of the container body, the two blade surfaces trace a circular path, which requires a high torque to cut, making it difficult to open.

[0005] SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a packaging container in which the container body sealingly holds the contents can be easily opened by rotating a cap. [Means for solving the problem]

[0006] The packaging container, from which contents can be poured, comprises a tubular container body sealed at both ends and a cap attached to one end of the container body. The cap includes a flat top plate, a cylindrical peripheral wall connected to the outer periphery of the top plate, a cylindrical nozzle connected to the center of the outer surface of the top plate, a piercing portion connected to the center of the inner surface of the top plate, having a pointed cone shape and provided with a window communicating with the hollow portion of the nozzle, and a protrusion provided on the inner surface of the peripheral wall. The container body has a thin-walled portion provided at the center of one end and a groove provided on the outer periphery of the container body so as to extend in a curved shape from one end to the other end, which accommodates the protrusion of the cap and guides the protrusion so that the cap moves toward the other end of the container body as the cap is rotated in a predetermined rotational direction. The tip of the piercing portion of the cap is positioned on the rotation axis of the cap, and when the convex portion is at the end of one end of the container body in the groove portion, the tip of the piercing portion and the thin-walled portion of the container body are separated, and as the cap rotates in a specified rotation direction, the piercing portion penetrates the thin-walled portion, and when the convex portion is at the end of the other end of the container body in the groove portion, the piercing portion is inserted into the container body, and the interior of the container body and the hollow portion of the nozzle portion are connected through the window portion. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a packaging container in which the container body sealing the contents can be easily opened by rotating the cap. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 shows a packaging container according to an embodiment. [Figure 2] 1 is a bottom view of a cap according to an embodiment; [Figure 3] Cross-sectional view along line III-III shown in Figure 2 [Figure 4] FIG. 1 is a diagram showing a container body according to an embodiment. [Figure 5] Schematic diagram for explaining how to attach a cap to a container body [Figure 6] Cross-sectional view along line VI-VI shown in Figure 5 [Figure 7]Schematic diagram for explaining how to open a packaging container DETAILED DESCRIPTION OF THE INVENTION

[0009] FIG. 1 is a diagram showing a packaging container according to an embodiment. More specifically, FIG. 1(a) is a front view of the packaging container according to the embodiment, and FIG. 1(b) is a side view of the packaging container according to the embodiment. FIG. 2 is a bottom view of the cap according to the embodiment, and FIG. 3 is a cross-sectional view taken along line III-III shown in FIG. 2. In the drawings, the central axes of the container body and the cap are indicated by dashed dotted lines. When the cap is attached to the container body, the central axes of the container body and the cap are substantially aligned. Furthermore, the axis of rotation when the cap is rotated to open the container is aligned with the central axis of the cap.

[0010] The packaging container 100 includes a container body 2 and a cap 1. The packaging container 100 is for storing a liquid such as a medical solution in a sealed state, and can be opened when necessary by rotating the cap 1, allowing the liquid to be extracted (dripped) from a nozzle portion 13 of the cap 1. Both the container body 2 and the cap 1 can be formed by injection molding or the like of a resin such as polypropylene or polyethylene.

[0011] The cap 1 has a flat top plate 11, a cylindrical peripheral wall 12 connected to the outer periphery of the top plate 11, a cylindrical nozzle 13 connected to the center of the outer surface of the top plate 11, a piercing portion 14 connected to the center of the inner surface of the top plate 11, and a protrusion 17 protruding from the inner periphery of the peripheral wall 12. The piercing portion 14 has a pointed cone shape. The tip of the piercing portion 14 is located on the rotation axis (center axis) of the cap 1. The piercing portion 14 also has a window 15 that communicates with the hollow portion of the nozzle 13. In this embodiment, the piercing portion 14 has a conical shape, and as shown in FIG. 2, three windows 15 are provided and three ribs extending from the tip to the bottom are formed.

[0012] The protrusion 17 constitutes a cam mechanism together with the groove 22 of the container body 2, which will be described later. The outer surface of the protrusion 17 is preferably curved, such as spherical. In this embodiment, the protrusion 17 has a hemispherical shape. As shown in FIG. 1(b), the peripheral wall 12 is provided with a window 18 through which the piercing portion 14 in the cap 1 can be seen. By providing the window 18 in the peripheral wall 12, the mold used to mold the cap 1 can be divided into upper and lower parts, and the protrusion 17 can be formed without forcibly removing it. A knurling 19 is formed on the outer peripheral surface of the peripheral wall 12, except for the portion where the window 18 is provided. The knurling 19 makes it less likely for a finger to slip when opening the cap 1, making it easier to apply torque.

[0013] The outer shape of piercing portion 14 is not limited to a cone, and may be a pyramid such as a square pyramid or a triangular pyramid. The number of window portions 15 is not particularly limited, but it is preferable that the number of ribs (columnar portions extending from the tip to the bottom of the cone shape) formed after forming window portions 15 is 3 or 4. If the number of ribs formed on piercing portion 14 is 3 or 4, the strength of piercing portion 14 and the fluidity of the contents can be ensured.

[0014] Figure 4 shows a container body according to an embodiment, with Figures 4(c) and 4(d) being front and side views of the container body, respectively, and Figures 4(a) and 4(b) being top views of the container body shown in Figures 4(c) and 4(d), respectively.

[0015] The container body 2 has a tube shape. Figures 4(c) and 4(d) show the container body 2 in a state in which the contents are housed and the upper end 4 and lower end 5 are sealed. For example, the container body 2 is molded with the lower end 5 open, and after the contents are enclosed, the lower end 5 is sealed by heat sealing or the like.

[0016] The container body 2 has a thin-walled portion 21 provided in the center of the upper end 4, a groove portion 22 provided on the outer circumferential surface, and a slope 23 and a wall portion 24 provided on the upper end 4.

[0017] The thin-walled portion 21 is a portion that is pierced by the piercing portion 14 of the cap 1 when opening the container, and is relatively thinner than other portions and formed to a thickness that allows the piercing portion 14 to pierce the thin-walled portion 21. The groove 22 is provided on the outer peripheral surface of the container body 2 so as to extend in a curved (spiral) shape from the upper end 4 toward the lower end 5. The groove 22 is formed to accommodate the protrusion 17 provided on the inner peripheral surface of the peripheral wall portion 12 of the cap 1 and to allow the protrusion 17 to slide along the groove 22. The groove 22, together with the protrusion 17 of the cap 1, constitutes a cam mechanism that converts the rotational movement of the cap 1 into linear movement toward the central axis of the cap 1. As the cap 1 rotates in a predetermined rotational direction about the central axis (in this embodiment, the clockwise direction when viewed from above in a plan view of the packaging container 100 shown in FIG. 1 ; hereinafter referred to as the "opening direction"), the groove 22 guides the protrusion 17 so that the cap 1 moves toward the lower end 5 of the container body 2.

[0018] The slope 23 is provided at the upper end 4 of the container body 2, and its height decreases as it moves in the direction of opening the cap (clockwise in FIGS. 4(a) and 4(b)). As shown in FIGS. 4(a) and 4(c), the wall portion 24 is formed to rise from the lower end position of the slope 23 along a plane parallel to the central axis of the container body 2. The slope 23 and the wall portion 24 are provided to facilitate attachment of the cap 1 to the container body 2, and details will be described later.

[0019] As shown in FIGS. 4( c) and 4(d), a first retaining portion 25 for retaining the protrusion 17 of the cap 1 is provided at the end of the groove 22 on the upper end 4 side of the container body 2. The first retaining portion 25 is provided to maintain the state in which the cap 1 is attached to the container body 2 and is composed of, for example, a recess 31 capable of accommodating the protrusion 17, a first rib 27 extending laterally along the upper end of the recess 31, and a second rib 28 extending vertically along the left end of the recess 31. The first rib 27 and the second rib 28 are formed to protrude from the bottom of the groove 22. Without the first retaining portion 25, the container body 2 and the cap 1 would easily separate before opening the packaging container 100, necessitating the operation of attaching the cap 1 to the container body 2 during use. The provision of the first retaining portion 25 maintains the container body 2 and the cap 1 engaged with each other, allowing the opening operation by rotating the cap 1 to be immediately initiated, improving usability.

[0020] As shown in FIG. 4(d), a second retaining portion 26 for retaining the protrusion 17 of the cap 1 is provided at the end of the groove 22 near the lower end 5 of the container body 2. The second retaining portion 26 is provided to maintain the cap 1 fully tightened on the container body 2. Similar to the first retaining portion 25, the second retaining portion 26 is composed of, for example, a recess 32 capable of accommodating the protrusion 17 and a third rib 29 extending vertically along the right end of the recess 32. The third rib 29 is formed to protrude from the bottom of the groove 22. Without the second retaining portion 26, the cap 1 may loosen when pouring the contents after opening, causing a loss of adhesion between the piercing portion 14 and the broken portion of the thin-walled portion 21, potentially resulting in liquid leakage. The provision of the second retaining portion 26 prevents the cap 1 from loosening when the cap 1 is fully tightened and opened, thereby preventing liquid leakage when pouring the contents.

[0021] Figures 5 and 6 are schematic diagrams illustrating a method for attaching a cap to a container body. More specifically, Figure 5 is a partially cutaway view showing a state in which the cap 1 is placed on the upper end of the container body 2, and Figure 6 is a cross-sectional view taken along line VI-VI in Figure 5, illustrating the process of positioning the protrusion.

[0022] In order to engage the protrusion 17 of the cap 1 with the first holding portion 25 of the groove 22 of the container body 2, it is necessary to align the protrusion 17 with the first holding portion 25. In the packaging container 100 according to this embodiment, the slope 23 and wall 24 provided on the upper end 4 of the container body 2 can be used to align the protrusion 17 with the first holding portion 25.

[0023] First, as shown in Fig. 5, the cap 1 is placed on the upper end 4 of the container body 2. In this case, simply placing the cap 1 does not necessarily result in the protrusion 17 being positioned at a position corresponding to the first holding portion 25 (the end of the groove portion 22 on the upper end 4 side). Here, as an example, it is assumed that when the cap 1 is placed on the upper end 4 of the container body 2, the protrusion 17 is positioned on the upper surface midway along the slope 23, as shown in Figs. 5 and 6(a).

[0024] When the cap 1 is placed on the upper end 4 of the container body 2 and then rotated in the opening direction, the protrusion 17 moves along the upper surface of the slope 23 downward (toward the lower end of the container body 2) as shown in FIG. 6(b). When the cap 1 is further rotated in the opening direction, the protrusion 17 comes into contact with a wall 24 rising from the lower end of the slope 23, and the rotation of the cap 1 stops. The wall 24 is formed in a position where the stopping position of the protrusion 17 and the position of the first holding portion 25 substantially overlap in the circumferential direction, and when the protrusion 17 of the cap 1 comes into contact with the wall 24, the protrusion 17 is positioned in a position corresponding to the end of the groove 22 on the lower end 5 side of the container body 2 (i.e., the first holding portion 25).

[0025] With the protrusion 17 positioned at a position where it overlaps with the first holding portion 25 in the circumferential direction, the cap is pressed toward the lower end 5 of the container body 2, causing the protrusion 17 to climb over the first rib 27 (see FIGS. 4 and 5) of the first holding portion 25 and engage with the first holding portion 25. This causes the cap 1 to be attached to the container body 2.

[0026] When setting the cap 1 on the container body 2, it is preferable that the force required for the convex portion 17 of the cap 1 to get over the first rib 27 is less than 5 N. The force required for the convex portion 17 to get over the first rib 27 can be measured using a push-pull gauge. When the force required for the convex portion 17 to get over the first rib 27 is less than 5 N, the cap 1 can be easily set on the container body 2.

[0027] In this embodiment, the first holding portion 25 is provided in the groove 22 of the container body 2, but even if the first holding portion 25 is omitted, the provision of the slope 23 and the wall 24 makes it possible to easily engage the protrusion 17 of the cap 1 with the end of the groove 22 on the upper end 4 side of the container body 2. Furthermore, the slope 23 and the wall 24 can be omitted, but as described above, this has the advantage of making it easier to align the cap 1 when setting it on the container body 2, and also makes it possible to automate the setting of the cap 1 on the container body 2.

[0028] Fig. 7 is a schematic diagram for explaining a method for opening a packaging container. Fig. 7 is a partially cutaway view showing the process of tightening the cap in the opening direction, and in Fig. 7(b), for convenience of illustration, the position of the protrusion 17 is indicated by a dashed line.

[0029] FIG. 7(a) shows a state in which the protrusion 17 of the cap 1 is located at the end of the groove 22 on the upper end 4 side of the container body 2 and is engaged with the first holding portion 25. In the state shown in FIG. 7(a), the tip of the piercing portion 14 is separated from the thin-walled portion 21 of the container body 2, maintaining the container body 2 in a sealed state. Because the protrusion 17 of the cap 1 is engaged with the first holding portion 25 and rotation of the cap 1 is restricted, the cap 1 is prevented from separating from the container body 2, or from rotating in the opening direction and causing the piercing portion 14 to come into contact with the thin-walled portion 21. When a rotational force is applied to the cap 1 in the opening direction and the torque applied to the cap 1 exceeds a certain level, the protrusion 17 moves over the second rib 28 and advances along the groove 22.

[0030] The torque required for the protrusion 17 of the cap 1 to overcome the second rib 28 is preferably greater than 5 N·cm and less than 10 N / cm. The torque required for the protrusion 17 to overcome the second rib 28 can be measured using a torque gauge. If the torque required for the protrusion 17 to overcome the second rib 28 is within the above range, a certain amount of torque is required for the protrusion 17 to overcome the second rib 28, thereby preventing the protrusion 17 from unnecessarily climbing over the second rib 28. Furthermore, when the setting of the cap 1 on the container body 2 is automated, it is possible to prevent the piercing portion 14 from piercing the thin-walled portion 21.

[0031] Figure 7(b) shows the state in which the cap 1 is rotated in the opening direction from the state shown in Figure 7(a) and the piercing portion 14 of the cap 1 abuts against the thin-walled portion 21 of the container body 2. The tip of the piercing portion 14 is on the rotation axis of the cap 1 and contacts the center of the thin-walled portion 21. When the cap 1 is further rotated in the opening direction from the state shown in Figure 7(b), the piercing portion 14 breaks through the thin-walled portion 21 as the cap 1 rotates in the opening direction. When the cap 1 is further tightened, the piercing portion 14 is inserted into the container body 2, and the protrusion 17 of the cap 1 rides over the third rib 29 of the second holding portion 26 (see Figures 4(b) and 5) and engages with the second holding portion 26.

[0032] 7(c) shows a state in which the cap 1 is fully tightened, with the protrusion 17 of the cap 1 at the end of the groove 22 on the lower end 5 side of the container body 2 and engaged with the second retaining portion 26. In the state shown in FIG. 7(c), the piercing portion 14 penetrates the thin-walled portion 21 and is inserted into the container body 2, and the interior of the container body 2 communicates with the hollow portion of the nozzle portion 13 through the window 15 (see FIGS. 2 and 3) provided in the piercing portion 14, allowing the contents to be poured from the tip of the nozzle portion 13. In addition, the portion of the inner surface of the top plate 11 surrounding the piercing portion 14 is in close contact with the periphery of the thin-walled portion 21, preventing liquid from seeping out from ruptured portions of the thin-walled portion 21.

[0033] The torque required for the protrusion 17 of the cap 1 to overcome the third rib 29 is preferably 5 N·cm or more and 10 N / cm or less. The torque required for the protrusion 17 to overcome the third rib 29 can be measured using a torque gauge. If the torque required for the protrusion 17 to overcome the third rib 29 is within the above range, a certain amount of torque is required for the protrusion 17 to overcome the third rib 29 again after engaging with the second retaining portion 26. Therefore, the cap 1 is prevented from rotating in the opening direction and the piercing portion 14 of the cap 1 from coming out of the container body 2, allowing the contents to be poured stably and preventing the contents from leaking between the piercing portion 14 and the rupture point of the thin-walled portion 21.

[0034] As described above, in the packaging container 100 according to this embodiment, the tip of the piercing portion 14 provided on the inner surface of the cap 1 is located on the rotation axis of the cap 1, and therefore the propulsive force of the piercing portion 14 toward the lower end 5 of the container body 2, which is generated by the rotation of the cap 1, is concentrated on the tip of the piercing portion 14, making it easy for the piercing portion 14 to pierce the thin-walled portion 21. Therefore, according to this embodiment, a packaging container 100 can be realized that allows the container body 2, in which the contents are sealed, to be easily opened by rotating the cap 1.

[0035] It is preferable that the outer surface of the convex portion 17 of the cap 1 be spherical. If the outer surface of the convex portion 17 is spherical, the resistance when the convex portion 17 slides along the groove portion 22 is reduced, which further reduces the torque required to rotate the cap 1 and improves the ease of opening the container body 2. Furthermore, if the outer surface of the convex portion 17 is spherical, the repulsive force when engaging with the first holding portion 25 is also reduced, which makes it easier to set the cap 1 on the container body 2.

[0036] Furthermore, when the piercing portion 14 is formed in a cone shape as in this embodiment, an opening is formed in the center of the thin-walled portion 21, and a large flow path can be formed in the window portion 15 provided in the piercing portion 14. Therefore, compared to a configuration in which a slit is formed by cutting the thin-walled portion with two blades, such as the blade portion of the storage container described in Patent Document 1, the contents can be poured out more easily.

[0037] In a configuration in which the piercing portion 14 pierces the center of the thin-walled portion 21 of the container body 2, as in the packaging container 100 according to this embodiment, it is preferable to displace the gate position of the mold used to injection-molde the container body 2 from a position corresponding to the center of the thin-walled portion 21. When injection-molding the container body 2, it is common to displace the gate of the mold at a position corresponding to the center of the outer surface of the thin-walled portion 21. Disposing the gate at a position corresponding to the center of the thin-walled portion 21 can make it difficult to control the thickness of the thin-walled portion, which can result in uneven thickness or pinholes. Another problem is that gate marks remain in the area corresponding to the gate, making it difficult to pierce with the piercing portion 14. Displacing the gate of the mold from a position corresponding to the center of the thin-walled portion 21, more preferably outside the thin-walled portion 21, makes it easier to control the thickness of the thin-walled portion 21 and also reduces the torque required for piercing with the piercing portion 14.

[0038] The packaging container 100 according to this embodiment can be suitably used for packaging small amounts of liquids such as single-use medicinal solutions. It is particularly suited to packaging medicinal solutions that should be prevented from coming into contact with areas other than the affected area, such as animal medicines, pesticides for fleas and other pests, and solutions for treating rough skin. It is also suitable for packaging nutrients and pesticides for plants. [Example]

[0039] Examples of specific implementations of the present invention will be described below.

[0040] Example 1 The container body shown in Figure 2 was produced using a mixed resin of polypropylene and polyethylene. The gate of the mold used to mold the container body was positioned on the outside of the thin-walled portion. The cap shown in Figures 1 to 3 was also produced using polypropylene. The thickness of the thin-walled portion was 0.15 mm. The piercing portion of the cap was conical, and three windows were formed so that three ribs were formed from the tip to the bottom. The thickness of the ribs was 0.6 mm. The convex portion of the cap was hemispherical.

[0041] Example 2 Except for the fact that the piercing portion of the cap was cone-shaped, a container body and a cap were produced in the same manner as in Example 1. Four window portions were formed in the piercing portion of the cap so that four ribs were formed from the tip to the bottom.

[0042] (Comparative Example) The container body and cap described in Patent Document 1 were produced using the same mixed resin as in Example 1. The container body was formed so that the gate of the mold used during molding was at the center of the thin-walled part. The shape of the piercing part of the cap was cylindrical with two cutting edges at the tip, and the protrusion was prismatic.

[0043] The container body according to each example and comparative example was provided with the first to third ribs shown in Fig. 4. The force required to overcome the first rib was measured with a push-pull gauge, and the torque required to overcome the second and third ribs was measured with a torque meter. The heights of the first to third ribs formed in the grooves of the container body according to each example and comparative example were the same.

[0044] Table 1 shows the shapes of the convex portion and piercing portion of the caps according to each of the examples and comparative examples, and the force or torque required to overcome the first to third ribs.

[0045] [Table 1]

[0046] A cap was attached to the container body of each example and comparative example, and the opening torque and sliding torque were measured using a torque meter. The opening torque was the maximum torque required to pierce the thin-walled portion of the container body with the piercing portion of the cap, and the sliding torque was the torque required to rotate the cap before the piercing portion of the cap pierced the thin-walled portion of the container body. In addition, liquid was sealed in the container body and left for 24 hours, and the presence or absence of liquid leakage before opening was visually confirmed. Furthermore, when the liquid was extracted from the nozzle after opening, the presence or absence of liquid leakage from the gap between the thin-walled portion and the piercing portion was visually confirmed.

[0047] Table 2 shows the evaluation results of the packaging containers according to the examples and comparative examples.

[0048] [Table 2]

[0049] In the packaging containers of Examples 1 and 2, the tip of the piercing portion was located on the rotation axis of the cap, thereby reducing the opening torque compared to the comparative example. Furthermore, the hemispherical shape of the convex portion of the cap improved the sliding properties of the convex portion in the groove portion of the container body, thereby reducing the sliding torque compared to the comparative example. Furthermore, in Examples 1 and 2, the gate of the mold used to mold the container body was located on the outside of the thin-walled portion, making it easy to control the thickness of the thin-walled portion, and no liquid leakage from the thin-walled portion was observed before opening. Furthermore, since the opening method involved piercing the center of the thin-walled portion with the piercing portion, even if any liquid leakage occurred from the gap between the piercing portion and the thin-walled portion after opening, it was very slight. Furthermore, in Examples 1 and 2, the upper end of the container body was provided with a slope and a wall portion, making it easy to attach the cap to the container body and suitable for automation.

[0050] In contrast, the cap of the packaging container according to the comparative example has a cylindrical piercing portion with a bifurcated blade surface at the tip and a prismatic convex portion. Because the pressing force is distributed across the two blade surfaces of the piercing portion, the opening torque is higher than in the example. Furthermore, because the convex portion of the cap is prismatic, it slides poorly along the groove, resulting in a higher sliding torque than in the example. In the comparative example, the gate of the mold used to mold the container body is located at the center of the thin-walled portion, which can result in uneven thickness of the thin-walled portion, resulting in liquid leakage at the molding location corresponding to the gate. [Industrial Applicability]

[0051] The present invention can be used as a packaging container for liquids, and is particularly suitable as a packaging container for enclosing a small amount of single-use liquid medicine. [Explanation of symbols]

[0052] 1 cap 2 Container body 4 Top edge 5 Bottom edge 11 Top plate 12 Peripheral wall section 13 Nozzle section 14 Piercing part 15 Window section 19 Knurling 21 Thin-walled section 22 Groove 23 Slope 24 Wall 25 1st holding part 26 Second holding part 100 packaging containers

Claims

1. A packaging container from which contents can be poured, a tubular container body with both ends sealed; a cap attached to one end of the container body, The cap is A flat top plate portion, a cylindrical peripheral wall portion connected to an outer periphery of the top plate portion; a cylindrical nozzle portion connected to the center of the outer surface of the top plate portion; a piercing portion connected to the center of the inner surface of the top plate portion, having a pointed cone shape, and provided with a window portion communicating with the hollow portion of the nozzle portion; a protrusion provided on the inner surface of the peripheral wall portion, The container body is a thin-walled portion provided at the center of the one end; a groove portion that is provided on the outer peripheral surface of the container body so as to extend in a curved line from the one end side toward the other end side, that accommodates the convex portion of the cap, and that guides the convex portion so that the cap moves toward the other end side of the container body as the cap rotates in a predetermined rotation direction; a tip of the piercing portion of the cap is positioned on a rotation axis of the cap, A packaging container in which, when the convex portion is at the end of the one end of the container body in the groove portion, the tip of the piercing portion and the thin-walled portion of the container body are separated, and the piercing portion penetrates the thin-walled portion as the cap rotates in the specified rotational direction, and when the convex portion is at the end of the other end of the container body in the groove portion, the piercing portion is inserted into the container body, and the interior of the container body and the hollow portion of the nozzle portion are connected through the window portion.

2. At the one end of the container body, a slope whose height decreases as it moves in the predetermined rotation direction; a wall portion rising from the lower end of the slope, The packaging container according to claim 1 , wherein the protrusion of the cap is positioned at a position in the groove corresponding to the end of the one end of the container body when the protrusion is in contact with the wall portion.

3. The packaging container according to claim 1 , wherein the convex portion is hemispherical.

4. The packaging container according to claim 1 , wherein a first holding portion that holds the convex portion of the cap is provided at an end of the groove on the one end side of the container body.

5. The packaging container according to claim 1 , wherein a second holding portion that holds the convex portion of the cap is provided at an end of the groove on the other end side of the container body.

6. The packaging container according to claim 1 , wherein a knurling is provided on an outer peripheral surface of the peripheral wall portion of the cap.

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