Spout assembly, container with spout, and method for manufacturing a spout assembly

Abstract

To provide a spout assembly capable of preventing alteration of a content and easily opened, a container with the same, and method for manufacturing the spout assembly.SOLUTION: A spout assembly 20 comprises: a spout 30 having a cylindrical part 31 having a male screw 31a formed on the outer surface and a first flange 32 located below the cylindrical part 31; and a cap 50 having a top part 51, a cap cylinder 52 having a female screw 52a formed in the inner surface to be engaged with the male screw 31a of the spout 30 and extending from the top 51, and a band 60 connected to the cap cylinder 52 via a thin part 61. A second flange 66 is provided at the lower end of the band 60 so as to project outside in a radial direction.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a pouring outlet assembly, a container with a pouring outlet, and a method for manufacturing the pouring outlet assembly.

Background Art

[0002] Conventionally, a pouring outlet attached to a container has been known (for example, Patent Document 1). In Patent Document 1, a pouring outlet plug and a packaging container are disclosed, which can suppress an increase in the force required for opening the plug while ensuring high sealing performance even in a configuration where a closing plate is not provided on the plug body. This pouring outlet plug is provided with a band portion, which is a tamper-evidence band that can be detached from the cap by breaking a thin portion when opening the plug.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in a container to which such a pouring outlet is attached, when a plurality of containers are arranged side by side, it may be required that the pouring outlet attached to one container and the pouring outlet attached to another container do not interfere with each other. Further, it may be required that the pouring outlet attached to the container does not inadvertently interfere with, for example, cardboard for packing the container. For this reason, it may be required to make the height of the pouring outlet below a predetermined height. Generally, the container body is attached below the band portion. For this reason, it may be required to make the height of the cap provided above the band portion below a predetermined height, which may make it difficult to open the container.

[0005] This disclosure has been made with these points in mind, and aims to provide a spout assembly, a container with a spout, and a method for manufacturing a spout assembly that prevents tampering with the contents and allows for easy opening. [Means for solving the problem]

[0006] A first aspect of the present disclosure is a spout assembly comprising a spout having a cylindrical portion with male threads formed on its outer surface and a first flange portion located below the cylindrical portion, a cap having a top portion, a cap cylinder portion extending from the top portion and having female threads formed on its inner surface that screw into the male threads of the spout, and a band portion connected to the cap cylinder portion via a thin-walled portion, wherein a second flange portion protruding radially outward is provided at the lower end of the band portion.

[0007] A second aspect of this disclosure is the spout assembly according to the first aspect described above, wherein a first projection is formed above the second flange portion, projecting radially outward.

[0008] A third aspect of the present disclosure is the spout assembly according to the second aspect described above, wherein a first base portion may be arranged on the upper surface of the band portion, and the first projection may protrude radially outward from the first base portion.

[0009] A fourth aspect of the present disclosure is a spout assembly according to the second or third aspect described above, wherein in a vertical cross-section, the upper surface of the first projection may be inclined downward as it extends radially outward, or it may be curved to be convex radially outward.

[0010] A fifth aspect of this disclosure is a spout assembly according to each of the first to fourth aspects described above, wherein the outer surface of the band portion may be provided with ribs projecting radially outward.

[0011] A sixth aspect of this disclosure is the spout assembly according to the fifth aspect described above, wherein the ribs may extend in the vertical direction.

[0012] A seventh aspect of the present disclosure is a spout assembly according to the fifth or sixth aspect described above, wherein, in plan view, the rib may include a first surface extending radially and a second surface provided on the side of the cap that is closer to the closing direction than the first surface, and extending from the first surface to the outer surface of the band portion.

[0013] An eighth aspect of the present disclosure is a spout assembly according to each of the fifth to seventh aspects described above, wherein the ribs may be provided in multiple locations along the circumferential direction.

[0014] A ninth aspect of the present disclosure is the spout assembly according to the eighth aspect described above, wherein the plurality of ribs may be arranged at equal intervals in the circumferential direction.

[0015] A tenth aspect of the present disclosure is a spout assembly according to each of the first to ninth aspects described above, wherein a first base portion may be disposed on the upper surface of the band portion, a second base portion may be disposed on the lower surface of the cap cylinder portion, and the first base portion and the second base portion may overlap each other in the circumferential direction.

[0016] An eleventh aspect of the present disclosure is a spout assembly according to the tenth aspect described above, wherein the second base portion may be arranged in a plurality, and at least one of the second base portion may be positioned in a location that is not symmetrical with respect to the other second base portion with respect to the central axis of the cap in a plan view.

[0017] A twelfth aspect of the present disclosure is a spout assembly according to the tenth or eleventh aspect described above, wherein a first claw portion protruding upward is formed on the upper surface of the band portion, and a second claw portion protruding downward is formed on the lower surface of the cap cylinder portion, and the second claw portion may overlap the first base portion in the vertical direction.

[0018] A thirteenth aspect of the present disclosure is a spout assembly according to each of the tenth to twelfth aspects described above, wherein a first claw portion projecting upward is formed on the upper surface of the band portion, and a second claw portion projecting downward is formed on the lower surface of the cap cylinder portion, and the first claw portion may overlap the second base portion in the vertical direction.

[0019] A fourteenth aspect of the present disclosure is a spout assembly according to each of the first to thirteen aspects described above, wherein a second projection projecting upward is formed on the upper surface of the first flange portion, and a third projection is formed on the band portion that engages with the second projection in the circumferential direction.

[0020] A fifteenth aspect of the present disclosure is a spout assembly according to each of the first to thirteenth aspects described above, wherein a second projection projecting radially outward is formed on the outer surface of the cylindrical portion, and a third projection is formed on the band portion that engages with the second projection in the circumferential direction.

[0021] A sixteenth aspect of the present disclosure is a spout assembly according to the fourteenth or fifteenth aspect described above, wherein the second protrusion and the third protrusion do not have to overlap each other in the vertical direction.

[0022] A seventeenth aspect of the present disclosure is that in the pouring outlet assembly according to each of the fourteenth to sixteenth aspects described above, a fourth protrusion protruding radially outward may be formed on the cylindrical portion, and a fifth protrusion protruding radially inward and engaging with the fourth protrusion from below may be formed on the band portion.

[0023] An eighteenth aspect of the present disclosure is that in the pouring outlet assembly according to each of the first to seventeenth aspects described above, a first stopper for restricting rotation of the cap in the closing direction may be provided on the cylindrical portion, and a second stopper engaging with the first stopper may be provided on the cap cylindrical portion.

[0024] A nineteenth aspect of the present disclosure is that in the pouring outlet assembly according to each of the first to eighteenth aspects described above, a third stopper for restricting rotation of the cap in the closing direction may be provided on the cylindrical portion, a fourth stopper engaging with the third stopper may be provided on the band portion, a first claw portion protruding upward may be formed on the upper surface of the band portion, a second claw portion protruding downward may be formed on the lower surface of the cap cylindrical portion, and the first claw portion and the second claw portion may overlap each other in the vertical direction.

[0025] A twentieth aspect of the present disclosure is a container with a pouring outlet, comprising a container body provided with an opening and a pouring outlet assembly according to each of the first to nineteenth aspects described above, which is attached to the container body and closes the opening.

[0026] A twenty-first aspect of the present disclosure is that in the container with a pouring outlet according to the twentieth aspect described above, the band portion may be inserted into the opening, and the second flange portion may be sandwiched between the container body and the first flange portion.

[0027] The 22nd aspect of the present disclosure includes a container body provided with an opening, and a spout assembly according to each of the 14th to 17th aspects described above, which is attached to the container body and closes the opening. The band portion is inserted into the opening, the second flange portion is sandwiched between the container body and the first flange portion, and the second protrusion and the third protrusion overlap each other in the vertical direction. It is a container with a spout.

[0028] The 23rd aspect of the present disclosure includes a step of preparing a spout having a cylindrical portion with a male thread formed on the outer surface and a first flange portion located below the cylindrical portion, a top portion, and a cap cylinder portion that extends from the top portion and has a female thread formed on the inner surface to be screwed into the male thread of the spout. And a step of preparing a cap having a band portion connected to the cap cylinder portion via a thin-walled portion, and a step of attaching the cap to the spout. In the step of attaching the cap to the spout, the female thread is screwed into the male thread by rotating the cap with respect to the spout, and a second flange portion that protrudes radially outward is provided at the lower end of the band portion. It is a manufacturing method of a spout assembly.

[0029] The 24th aspect of the present disclosure includes a step of preparing a spout having a cylindrical portion with a male thread formed on the outer surface and a first flange portion located below the cylindrical portion, a top portion, and a cap cylinder portion that extends from the top portion and has a female thread formed on the inner surface to be screwed into the male thread of the spout. And a step of preparing a cap having a band portion connected to the cap cylinder portion via a thin-walled portion, and a step of attaching the cap to the spout. In the step of attaching the cap to the spout, the female thread is screwed into the male thread by caulking, and a second flange portion that protrudes radially outward is provided at the lower end of the band portion. It is a manufacturing method of a spout assembly.

Advantages of the Invention

[0030] According to the present disclosure, it is possible to prevent tampering with the contents and to easily open the container with a spout. [Brief explanation of the drawing]

[0031] [Figure 1] Figure 1 is a perspective view showing a container with a spout according to one embodiment. [Figure 2] Figure 2 is a side view showing a container with a spout according to one embodiment. [Figure 3] Figure 3 is a cross-sectional view (cross-sectional view along line III-III in Figure 2) showing a container with a spout according to one embodiment. [Figure 4] Figure 4 is a perspective view showing a spout assembly according to one embodiment. [Figure 5] Figure 5 is a perspective view showing the spout of a spout assembly according to one embodiment. [Figure 6] Figure 6 is a cross-sectional view (enlarged view of part VI in Figure 3) showing a spout assembly according to one embodiment. [Figure 7] Figure 7 is a cross-sectional view (cross-sectional view along line VII-VII in Figure 3) showing a spout assembly according to one embodiment. [Figure 8A] Figures 8A(a)-(b) are cross-sectional views illustrating the operation of a container with a spout according to one embodiment. [Figure 8B] Figures 8B(a)-(c) are cross-sectional views illustrating the operation of a container with a spout according to one embodiment. [Figure 9] Figure 9 is a cross-sectional view showing a first modified example of a spout assembly according to one embodiment. [Figure 10] Figure 10 is a perspective view showing a second modified spout of the spout assembly according to one embodiment. [Figure 11] Figure 11 is a cross-sectional view (corresponding to Figure 3) showing a second modified example of the spout assembly according to one embodiment. [Figure 12] Figure 12 is a cross-sectional view (cross-sectional view along line XII-XII in Figure 11) showing a second modified example of the spout assembly according to one embodiment. [Figure 13] Figure 13 is a cross-sectional view (enlarged view of part XIII in Figure 11) showing a second modified example of the spout assembly according to one embodiment. [Figure 14] Figure 14 is a perspective view showing a cap of a second modified example of the spout assembly according to one embodiment. [Figure 15] Figure 15 is a cross-sectional view (corresponding to Figure 11) showing a second modified example of the spout assembly according to one embodiment. [Figure 16] Figure 16 is a perspective view showing a second modified example of the spout assembly according to one embodiment. [Figure 17] Figure 17 is a cross-sectional view (cross-sectional view along line XVII-XVII in Figure 11) showing a second modified example of the spout assembly according to one embodiment. [Figure 18] Figure 18 is a perspective view showing another example of a cap for a second modified example of the spout assembly according to one embodiment. [Figure 19] Figure 19 is a perspective view showing another example of a spout in a second modification of the spout assembly according to one embodiment. [Figure 20] Figure 20 is a perspective view showing another example of a cap for a second modified example of the spout assembly according to one embodiment. [Figure 21] Figure 21 is a front view showing a third modified example of the spout assembly according to one embodiment. [Figure 22] Figure 22 is a front view illustrating the operation of a third modified example of the spout assembly according to one embodiment. [Figure 23] Figure 23 is a front view showing another example of a third modified example of the spout assembly according to one embodiment. [Figure 24] Figures 24(a)-(b) are cross-sectional views illustrating the operation of a fourth modified example of the spout assembly according to one embodiment. [Figure 25] Figure 25 is a perspective view showing the spout of a fifth modified example of the spout assembly according to one embodiment. [Figure 26] Figure 26 is a cross-sectional view (corresponding to Figure 3) showing a fifth modified example of the spout assembly according to one embodiment. [Figure 27] Figure 27 is a cross-sectional view (cross-sectional view along line XXVII-XXVII in Figure 26) showing a fifth modified example of the spout assembly according to one embodiment. [Figure 28]Figure 28 is a cross-sectional view (cross-sectional view along line XXVIII-XXVIII in Figure 26) showing a fifth modified example of the spout assembly according to one embodiment. [Figure 29] Figure 29 is a perspective view showing a cap of a fifth modified example of the spout assembly according to one embodiment. [Figure 30] Figure 30 is a front view showing a fifth modified example of the spout assembly according to one embodiment. [Figure 31] Figure 31 is a front view showing a cap of a fifth modified example of the spout assembly according to one embodiment. [Figure 32] Figure 32 is a side view showing a cap of a fifth modified example of the spout assembly according to one embodiment. [Modes for carrying out the invention]

[0032] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. Figures 1 to 8B show an embodiment of the present disclosure. The following figures are schematic diagrams. Therefore, the size and shape of each part are exaggerated as appropriate to facilitate understanding. Furthermore, it is possible to implement the invention with appropriate modifications without departing from the technical concept. In the following figures, the same parts are denoted by the same reference numerals, and some detailed explanations may be omitted. In addition, the numerical values ​​such as dimensions and material names of each component described in this specification are examples of embodiments and are not limited to these, and can be selected and used as appropriate. In this specification, terms that specify shapes and geometric conditions, such as parallel, orthogonal, and perpendicular, shall be interpreted to include not only their strict meaning but also substantially the same state.

[0033] Container with spout As shown in Figures 1 and 2, one embodiment of the container with a spout 1 comprises a container body 10 provided with an opening 11, and a spout assembly 20 attached to the container body 10 to close the opening 11.

[0034] In this embodiment, the container body 10 is a paper container. In the illustrated example, the container body 10 has a rectangular cylindrical body 12, a rectangular plate-shaped bottom 13, and a top 14, and is a so-called gable-top type container. The top 14 includes a pair of opposing inclined plates 15 and a pair of folded portions 16 located between the pair of inclined plates 15 and folded between the inclined plates 15. The pair of inclined plates 15 are bonded or welded to each other via adhesive tabs 17 provided at the upper ends of each.

[0035] In this case, when multiple containers with spouts 1 are arranged side by side, it may be required that the spout assembly 20 of one container 1 does not interfere with the spout assembly 20 of another container 1. Furthermore, it may be required that the spout assembly 20 of one container 1 does not unintentionally interfere with, for example, the cardboard box used to package the container 1, the display shelf for displaying the container 1, or other products. In this case, as shown in Figure 2, it may be required that, in a side view, the spout assembly 20 does not protrude forward (to the left in Figure 2) beyond the imaginary line X that is parallel to the body portion 12 of the container body 10 and extends from the body portion 12. For this reason, it may be required that the height of the cap 50 of the spout assembly 20, which will be described later, be below a predetermined height.

[0036] spout assembly Next, the spout assembly 20 will be described.

[0037] As shown in Figure 3, the spout assembly 20 includes a spout 30 attached to the container body 10 and a cap 50 fitted to the spout 30. Here, we will first describe the spout 30.

[0038] (pour spout) As shown in Figures 3 to 5, the spout 30 has a cylindrical portion 31 with male threads 31a (see Figure 3) formed on its outer surface, and a flange portion (first flange portion) 32 located below the cylindrical portion 31.

[0039] The cylindrical portion 31 includes a first cylindrical portion 33 and a second cylindrical portion 34 connected to the lower part of the first cylindrical portion 33. The first cylindrical portion 33 and the second cylindrical portion 34 each have a substantially cylindrical shape as a whole. The first cylindrical portion 33 is located radially inward from the second cylindrical portion 34. The male thread 31a described above is formed on the first cylindrical portion 33. The male thread 31a is an external thread and may be a right-hand thread. The female thread 52a of the cap 50, which will be described later, is screwed into this male thread 31a. The male thread 31a may also be a multi-start thread.

[0040] The flange portion 32 is located below the second cylindrical portion 34. The flange portion 32 is composed of a plate-like member that is substantially annular in shape when viewed from above. This flange portion 32 extends radially outward from the outer surface of the second cylindrical portion 34.

[0041] The flange portion 32 is the part that is attached to the container body 10 (see Figure 3). In other words, the spout 30 is attached to the container body 10 by fixing this flange portion 32 to the part (inclined plate 15) around the opening 11 of the container body 10, for example, by heat sealing or ultrasonic sealing.

[0042] Such a dispensing spout 30 is molded, for example, by injection molding. The dispensing spout 30 may also contain, for example, low-density polyethylene (LDPE), or polyethylene such as high-density polyethylene (HDPE) or medium-density polyethylene (MDPE). The resin used to mold the dispensing spout 30 may be a blend of the various resins mentioned above, or a resin containing biomass-derived components may be used.

[0043] (cap) Next, the cap 50 will be described. As shown in Figures 3 and 4, the cap 50 has a top portion 51, a cap cylinder portion 52 extending from the top portion 51 and having a female thread 52a (see Figure 3) formed on its inner surface that screws onto the male thread 31a of the spout 30, and a band portion 60 connected to the cap cylinder portion 52 via a thin-walled portion 61.

[0044] The top portion 51 has a roughly circular shape in plan view. Furthermore, a cylindrical stopper portion 53 (see Figure 3) that protrudes downward is provided on the lower surface of the top portion 51, radially inward from the cap cylinder portion 52. This stopper portion 53 is configured to fit into the cylindrical portion 31 of the spout 30.

[0045] The cap cylinder portion 52 of the cap 50 has a generally cylindrical shape. Multiple knurling grooves 54 (see Figure 4) are formed on the outer surface of the cap cylinder portion 52, which function as an anti-slip surface when the cap 50 is held in the hand. Each knurling groove 54 protrudes radially outward from the cap cylinder portion 52 and extends parallel to the vertical direction of the cap cylinder portion 52 (vertical direction in Figure 3). As described above, a female thread 52a is formed on the inner surface of the cap cylinder portion 52. The female thread 52a is an internal thread and may be a right-hand thread. The cap 50 is attached to the spout 30 by screwing this female thread 52a into the male thread 31a of the cylindrical portion 31. The female thread 52a may be a multi-start thread.

[0046] Next, the band portion 60 of the cap 50 will be described. The band portion 60 consists of a ring-shaped pilfer band and is a type of band that maintains its annular shape without breaking in a part of the circumferential direction even after opening. The band portion 60 is connected to the cap cylinder portion 52 via a thin-walled portion 61, and a gap is formed between the band portion 60 and the cap cylinder portion 52 in the vertical direction.

[0047] The thin-walled portion 61 is provided between the cap cylinder portion 52 and the band portion 60. The thin-walled portion 61 is a thin, columnar part. In this embodiment, the thin-walled portion 61 extends upward from the base portion 62, which will be described later, and is provided in multiples (for example, four) at intervals in the circumferential direction. Furthermore, each thin-walled portion 61 is breakable, and the cap cylinder portion 52 and the band portion 60 can be easily separated at the thin-walled portion 61. In this case, the broken thin-walled portion 61 may remain on the band portion 60 side. The device is configured so that it is possible to determine whether or not the cap 50 has been improperly opened by checking whether or not the thin-walled portion 61 has been broken.

[0048] Furthermore, multiple (for example, four) base portions (first base portions) 62 are arranged on the upper surface of the band portion 60 at intervals in the circumferential direction. Each of the base portions 62 protrudes toward the cap cylinder portion 52.

[0049] In this embodiment, as shown in Figure 3, the band portion 60 is inserted into the opening 11 of the container body 10. This allows the height of the cap cylinder portion 52 of the cap 50 to be increased even when the height of the cap 50 is set to a predetermined height or less. That is, when the container body 10 is attached below the band portion 60, the sum of the height of the cap cylinder portion 52 and the height of the band portion 60 may be required to be below a predetermined height. On the other hand, when the band portion 60 is inserted into the opening 11 of the container body 10, the height of the cap cylinder portion 52 can be increased compared to when the container body 10 is attached below the band portion 60. As a result, even when the cap 50 has a band portion 60, a decrease in the ease of opening the cap 50 can be suppressed.

[0050] Furthermore, as shown in Figures 3, 4, and 6, a flange portion (second flange portion) 66 is provided at the lower end of the band portion 60, projecting radially outward. The flange portion 66 is composed of a plate-like member with a substantially annular shape in plan view.

[0051] The flange portion 66 is the part sandwiched between the container body 10 and the flange portion (first flange portion) 32 of the spout 30 (see Figure 3). In this way, the flange portion 66 is sandwiched between the container body 10 and the flange portion 32 fixed to the container body 10, thereby suppressing the vertical movement of the band portion 60 relative to the container body 10 and the spout 30 in the container with a spout 1. Therefore, the thin-walled portion 61 can be easily broken by rotating the cap 50 in the opening direction. The amount L of the flange portion 66 protruding radially outward from the outer surface of the band portion 60 (see Figure 6) may be 0.5 mm or more and 1.5 mm or less. Note that the flange portion 66 does not have to be fixed to the part (inclined plate 15) around the opening 11 of the container body 10.

[0052] Furthermore, as shown in Figures 3, 4, 6, and 7, a rib 65 is provided on the outer surface of the band portion 60, projecting radially outward. This rib 65 plays a role in assisting in the rupture of the thin-walled portion 61. In other words, the rib 65 is the part that abuts against the edge of the opening 11 of the container body 10 when the container 1 with a spout is initially opened, thereby suppressing the rotation of the band portion 60. In this way, by providing the rib 65 on the outer surface of the band portion 60, the rotation of the band portion 60 can be restricted, and the thin-walled portion 61 can be easily ruptured. The amount L1 (see Figure 6) of the radial outward projection of the rib 65 from the outer surface of the band portion 60 may be 0.2 mm or more and 0.5 mm or less.

[0053] The rib 65 extends along the vertical direction. Furthermore, the rib 65 is provided across the entire length of the band portion 60 in the vertical direction. This allows the rib 65 to effectively suppress the rotation of the band portion 60.

[0054] As shown in Figure 7, multiple ribs 65 are provided along the circumferential direction. By providing multiple ribs 65 at intervals in the circumferential direction in this way, the rotation suppression effect of the band portion 60 by the ribs 65 can be enhanced. Furthermore, by providing multiple ribs 65 at intervals in the circumferential direction, the amount of resin used to form the ribs 65 can be reduced compared to when the ribs 65 are formed around the entire circumference. In the illustrated example, eight ribs 65 are provided on the outer surface of the band portion 60. The number of ribs 65 is arbitrary and may be between one and seven, or nine or more.

[0055] Multiple ribs 65 are arranged at equal intervals in the circumferential direction. This allows the ribs 65 to more effectively suppress the rotation of the band portion 60 when the container 1 with a spout is initially opened.

[0056] Furthermore, in a plan view, the rib 65 includes a first surface 65a extending radially and a second surface 65b located on the side of the cap 50 that is in the closing direction (clockwise in a plan view) relative to the first surface 65a, and extending from the first surface 65a to the outer surface of the band portion 60. As a result, when the cap 50 is rotated in the opening direction (counterclockwise in a plan view), the first surface 65a is more likely to interfere with the edge of the opening 11 of the container body 10. Therefore, when the cap 50 is rotated in the opening direction, the rotation of the band portion 60 is restricted, and the rotation of the band portion 60 together with the cap 50 can be effectively suppressed.

[0057] Here, as described above, the band portion 60 is inserted into the opening 11 of the container body 10. In this case, in a cross section perpendicular to the central axis CL of the cap 50, the radial distance d1 from the central axis CL to the tip of the rib 65 is preferably greater than or equal to the radius d2 of the opening 11. This allows the rib 65 to more effectively suppress the rotation of the band portion 60. In this case, the radial distance d1 from the central axis CL to the tip of the rib 65 may be 12.7 mm or more and 13 mm or less. Also, the radius d2 of the opening 11 may be 12.5 mm or more and 12.75 mm or less.

[0058] Referring again to Figures 3, 4, 6, and 7, a first projection 63 is formed above the flange portion (second flange portion) 66, projecting radially outward. In the illustrated example, the first projection 63 is formed above the rib 65 and protrudes radially outward from the rib 65. This first projection 63 plays a role in preventing the spout assembly 20 from being removed from the container body 10 when the spout assembly 20 is attached to the container body 10. That is, by sandwiching the portion around the opening 11 of the container body 10 between the first projection 63 and the flange portion 66, the spout assembly 20 can be prevented from being removed from the container body 10 (see Figure 3). The amount L2 of the radial outward projection of the first projection 63 from the outer surface of the band portion 60 (see Figure 6) may be 0.3 mm or more and 1.0 mm or less.

[0059] This first protrusion 63 is formed in a position that overlaps with the rib 65 in the circumferential direction. This increases the rigidity of the first protrusion 63 and suppresses deformation of the first protrusion 63. Therefore, when attaching the spout assembly 20 to the container body 10, it is possible to prevent the first protrusion 63 from being crushed by the part of the container body 10 surrounding the opening 11.

[0060] The first projection 63 protrudes radially outward from the base portion 62. As described above, the portion of the container body 10 around the opening 11 is sandwiched between the first projection 63 and the flange portion 66. Therefore, because the first projection 63 protrudes radially outward from the base portion 62 located on the upper surface of the band portion 60, the height of the band portion 60 can be reduced compared to the case where the first projection 63 is provided on a portion of the band portion 60 other than the base portion 62. As a result, the height of the cap cylinder portion 52 of the cap 50 can be increased, and even if the cap 50 has a band portion 60, a decrease in the ease of opening the cap 50 can be suppressed.

[0061] As shown in Figure 6, in the vertical cross-section, the upper surface of the first protrusion 63 is inclined downward as it extends radially outward. This makes it easier for the portion of the container body 10 around the opening 11 to pass over the first protrusion 63 of the cap 50 when the spout assembly 20 is attached to the container body 10.

[0062] The top portion 51, the cap cylinder portion 52, and the band portion 60 of such a cap 50 are integrally molded from synthetic resin. In this case, the cap 50 may be molded, for example, by injection molding. The cap 50 may also contain, for example, polypropylene (PP) or high-density polyethylene (HDPE). The resin used to mold the cap 50 may be a blend of the various resins mentioned above, or a resin containing biomass-derived components may be used.

[0063] Next, the operation of this embodiment will be described. Here, the manufacturing method and opening method of the container 1 with a spout will be explained with reference to Figures 8A(a)-(b) and 8B(a)-(c).

[0064] First, prepare the spout 30 and cap 50 of the spout assembly 20. The spout 30 and cap 50 may each be manufactured by injection molding, for example, using an injection molding machine (not shown).

[0065] Next, the fabricated cap 50 is attached to the spout 30. At this time, as shown in Figure 8A(a), the cap 50 is rotated relative to the spout 30, thereby screwing the female thread 52a of the cap 50 onto the male thread 31a of the spout 30. As a result, as shown in Figure 8A(b), the cap 50 is attached to the spout 30, and the spout assembly 20 is obtained.

[0066] In parallel with the fabrication of the spout assembly 20, the container body 10, which is provided with the opening 11, is prepared.

[0067] Next, the spout assembly 20 is attached to the container body 10. In this case, first, as shown in Figure 8B(a), the spout assembly 20 is inserted into the opening 11 of the container body 10, and the spout assembly 20 is attached to the container body 10.

[0068] At this time, as shown in Figure 8B(b), the band portion 60 is inserted into the opening 11 of the container body 10. Here, the portion of the container body 10 around the opening 11 is sandwiched between the first projection 63 and the flange portion 66 of the cap 50. In addition, a rib 65 is provided on the outer surface of the band portion 60, projecting radially outward. The rib 65 then abuts against the edge of the opening 11 of the container body 10. This prevents the spout assembly 20 from being removed from the container body 10.

[0069] Then, the spout 30 of the spout assembly 20 is fixed to the area around the opening 11 of the container body 10 via the flange portion 32 by heat sealing or ultrasonic sealing. In this way, the container 1 with a spout shown in Figure 1 is obtained. Note that in this case, the flange portion 66 does not necessarily have to be fixed to the area around the opening 11 of the container body 10.

[0070] Subsequently, the contents are filled into the container body 10 from the top 14 (see Figure 1), and the inclined plates 15 of the top 14 are bonded or welded (heat-sealed) to each other via the adhesive tab 17, thereby obtaining a paper container filled with contents (container with a spout) as a product.

[0071] When a user uses the container 1 with a spout, the user rotates the cap 50 in the opening direction (counterclockwise when viewed from above). Here, the flange portion 66 is sandwiched between the portion around the opening 11 of the container body 10 and the flange portion 32 of the spout 30. As a result, vertical movement of the band portion 60 relative to the container body 10 and the spout 30 is suppressed. In addition, a rib 65 is provided on the outer surface of the band portion 60, protruding radially outward. As a result, the rib 65 abuts against the edge of the opening 11 of the container body 10, thereby suppressing the rotation of the band portion 60. As a result, as shown in Figure 8B(c), when the cap 50 is rotated in the opening direction, the cap cylinder portion 52 moves upward so as to separate from the band portion 60, and the thin-walled portion 61 connecting the cap cylinder portion 52 and the band portion 60 breaks. In this way, the cap cylinder portion 52 of the cap 50 can be removed from the spout 30.

[0072] As described above, according to this embodiment, the spout assembly 20 comprises a spout 30 having a cylindrical portion 31 with a male screw 31a formed on its outer surface and a flange portion (first flange portion) 32 located below the cylindrical portion 31, and a cap 50 having a top portion 51, a cap cylinder portion 52 extending from the top portion 51 and having a female screw 52a formed on its inner surface that screws onto the male screw 31a of the spout 30, and a band portion 60 connected to the cap cylinder portion 52 via a thin-walled portion 61. In this way, by having a band portion 60 connected to the cap cylinder portion 52 via a thin-walled portion 61, it is possible to prevent tampering with the contents.

[0073] Furthermore, a flange portion (second flange portion) 66 is provided at the lower end of the band portion 60, projecting radially outward. This allows the flange portion (second flange portion) 66 to be sandwiched between the container body 10 and the flange portion (first flange portion) 32 of the spout 30 when the band portion 60 is inserted into the opening 11 of the container body 10. Therefore, when the container 1 with a spout is initially opened, vertical movement of the band portion 60 relative to the container body 10 and the spout 30 can be suppressed. As a result, the thin-walled portion 61 can be reliably broken when the container 1 with a spout is initially opened. Thus, in this embodiment, the band portion 60 can be inserted into the opening 11 of the container body 10. Therefore, the height of the cap cylinder portion 52 of the cap 50 can be increased. As a result, a decrease in the ease of opening the cap 50 can be suppressed, and the cap 50 can be easily opened.

[0074] Furthermore, according to this embodiment, a first projection 63 is formed above the flange portion 66, projecting radially outward. This allows the first projection 63 and the flange portion 66 to clamp the area around the opening 11 of the container body 10 when the spout assembly 20 is attached to the container body 10. Therefore, when attaching the spout assembly 20 to the container body 10, it is possible to prevent the spout assembly 20 from being removed from the container body 10.

[0075] Furthermore, according to this embodiment, the first projection 63 protrudes radially outward from the base portion 62. This allows the height of the band portion 60 to be lower compared to the case where the first projection 63 is provided on a portion of the band portion 60 other than the base portion 62. As a result, the height of the cap cylinder portion 52 of the cap 50 can be increased, and a decrease in the ease of opening the cap 50 can be suppressed.

[0076] Furthermore, according to this embodiment, in a vertical cross-section, the upper surface of the first protrusion 63 is inclined downward as it extends radially outward. This makes it easier for the portion of the container body 10 around the opening 11 to pass over the first protrusion 63 of the cap 50 when attaching the spout assembly 20 to the container body 10.

[0077] Furthermore, according to this embodiment, a rib 65 is provided on the outer surface of the band portion 60, projecting radially outward. This allows the rib 65 to contact the edge of the opening 11 of the container body 10 when the band portion 60 is inserted into the opening 11 of the container body 10. Therefore, when the container 1 with a spout is initially opened, the rib 65 contacts the edge of the opening 11 of the container body 10, suppressing the rotation of the band portion 60. This restricts the rotation of the band portion 60, ensuring that the thin-walled portion 61 is reliably broken when the container 1 with a spout is initially opened.

[0078] Furthermore, according to this embodiment, the rib 65 extends along the vertical direction. This allows the rib 65 to effectively suppress the rotation of the band portion 60.

[0079] Furthermore, according to this embodiment, in a plan view, the rib 65 includes a first surface 65a extending radially and a second surface 65b provided on the side of the cap 50 in the closing direction (clockwise) relative to the first surface 65a, and extending from the first surface 65a to the outer surface of the band portion 60. As a result, when the cap 50 is rotated in the opening direction (counterclockwise in a plan view), the first surface 65a is more likely to interfere with the edge of the opening 11 of the container body 10. Therefore, when the cap 50 is rotated in the opening direction, the rotation of the band portion 60 is restricted, and the rotation of the band portion 60 together with the cap 50 can be effectively suppressed.

[0080] Furthermore, according to this embodiment, multiple ribs 65 are provided along the circumferential direction. By providing multiple ribs 65 at intervals in the circumferential direction in this way, the rotation suppression effect of the band portion 60 by the ribs 65 can be enhanced. In addition, by providing multiple ribs 65 at intervals in the circumferential direction, the amount of resin used to form the ribs 65 can be reduced compared to the case where the ribs 65 are formed around the entire circumference.

[0081] Furthermore, according to this embodiment, multiple ribs 65 are arranged at equal intervals in the circumferential direction. This allows the ribs 65 to more effectively suppress the rotation of the band portion 60 when the container 1 with a spout is initially opened.

[0082] [Differentiation] Next, a modified example of the spout assembly 20 will be described.

[0083] (First variation) In the embodiment described above, an example was described in which the upper surface of the first projection 63 in the vertical cross-section slopes downward as it extends radially outward, but the embodiment is not limited to this. For example, as shown in Figure 9, the upper surface of the first projection 63 in the vertical cross-section may be curved so as to be convex radially outward. In this case as well, when attaching the spout assembly 20 to the container body 10, the portion of the container body 10 around the opening 11 can easily overcome the first projection 63 of the cap 50.

[0084] (Second variation) Furthermore, in the above-described embodiment, an example was described in which the spout 30 has a cylindrical portion 31 with male threads 31a formed on its outer surface and a flange portion 32 located below the cylindrical portion 31. In this case, a second projection 38 that protrudes upward may be formed on the upper surface of the flange portion 32.

[0085] As shown in Figures 10 to 13, in the spout 30 according to this modified example, a second projection 38 projecting upward is formed on the upper surface of the flange portion 32. In the illustrated example, the second projection 38 is connected to the second cylindrical portion 34 and is formed integrally with the second cylindrical portion 34. The second projection 38 is the part that the third projection 68 of the band portion 60, described later, contacts when the container 1 with the spout is initially opened, thereby suppressing the rotation of the band portion 60. In the illustrated example, four second projections 38 are provided. Note that the second projections 38 do not necessarily have to be connected to the second cylindrical portion 34, and a gap may be formed radially between the second projections 38 and the second cylindrical portion 34. Also, the number of second projections 38 is arbitrary, and may be one to three or five or more.

[0086] Furthermore, as shown in Figure 10, the second projection 38 includes a third surface 38a, a fourth surface 38b, and a fifth surface 38c. The third surface 38a extends vertically when viewed radially. The fourth surface 38b is located on the side of the cap 50 closer to the opening direction (counterclockwise in a plan view) than the third surface 38a and extends radially from the third surface 38a. The fifth surface 38c is located on the side of the cap 50 closer to the opening direction (counterclockwise in a plan view) than the fourth surface 38b and extends from the fourth surface 38b to the upper surface of the flange portion 32. Thus, because the second protrusion 38 includes a third surface 38a, a fourth surface 38b, and a fifth surface 38c, when the cap 50 is rotated in the opening direction (counterclockwise in a plan view), the sixth surface 68a of the cap 50, described later, is more likely to interfere with the third surface 38a of the second protrusion 38. As a result, even if the band portion 60 rotates together with the cap 50 when the cap 50 is rotated in the opening direction, the rotation of the band portion 60 can be restricted at a predetermined position. Therefore, when the container 1 with a spout is initially opened, the thin-walled portion 61 can be reliably broken. Furthermore, because the second protrusion 38 includes a fifth surface 38c, even if the third protrusion 68 of the band portion 60 comes into contact with the second protrusion 38 when the cap 50 is attached to the spout 30, the third protrusion 68 can more easily overcome the second protrusion 38.

[0087] As shown in Figure 13, in the spout 30 of this modified example, a fourth projection 37 is formed on the cylindrical portion 31, projecting radially outward. In the illustrated example, the fourth projection 37 is formed on the first cylindrical portion 33. The fourth projection 37 engages with the fifth projection 67 of the band portion 60, which will be described later, and plays a role in preventing the band portion 60 from being removed from the spout 30. This fourth projection 37 projects radially outward from the outer surface of the first cylindrical portion 33 and is formed around its entire circumference. This effectively prevents the band portion 60 from being removed from the spout 30.

[0088] Furthermore, in a vertical cross-section, the upper surface of the fourth protrusion 37 slopes downward as it extends radially outward. This makes it easier for the fifth protrusion 67 of the band portion 60, described later, to overcome the fourth protrusion 37 when attaching the cap 50 to the spout 30. The shape of the fourth protrusion 37 can be any shape, as long as the shape allows the fifth protrusion 67 to overcome the fourth protrusion 37 when attaching the cap 50 to the spout 30, and prevents the band portion 60 from being removed from the spout 30 after the container 1 with the spout has been initially opened. For example, although not shown in the figures, in a vertical cross-section, the upper surface of the fourth protrusion 37 may be curved so as to be convex radially outward.

[0089] Next, the modified cap 50 will be described. As shown in Figures 11 to 14, in the modified cap 50, a third projection 68 is formed on the band portion 60 that engages with the second projection 38 of the spout 30. This third projection 68 is the part that breaks the thin-walled portion 61 by engaging with the second projection 38 in the circumferential direction. That is, the third projection 68 is the part that abuts against the second projection 38 of the spout 30 when the container 1 with a spout is initially opened, thereby suppressing the rotation of the band portion 60. In this way, by providing the third projection 68 on the inner surface of the band portion 60, the thin-walled portion 61 can be reliably broken. In the illustrated example, four third projections 68 are provided. The number of third projections 68 is arbitrary and may be one to three or five or more.

[0090] As shown in Figures 13 and 14, in this modified example, the band portion 60 includes a thickened portion 69a and a thinned portion 69b located below the thickened portion 69a. The thinned portion 69b is formed by reducing the thickness of the band portion 60 from the radially inward side. The third protrusion 68 described above protrudes downward from the lower surface of the thickened portion 69a.

[0091] Furthermore, as shown in Figure 14, the third projection 68 includes a sixth surface 68a and a seventh surface 68b. The sixth surface 68a extends vertically when viewed radially. The seventh surface 68b is located on the side of the cap 50 that is closed (clockwise in a plan view) than the sixth surface 68a, and extends from the sixth surface 68a to the lower surface of the thickened portion 69a. In this way, because the third projection 68 includes the sixth surface 68a and the seventh surface 68b, when the cap 50 is rotated in the opening direction (counterclockwise in a plan view), the sixth surface 68a of the band portion 60 is more likely to interfere with the third surface 38a of the second projection 38.

[0092] Here, as shown in Figure 15, in the spout assembly 20, the second protrusion 38 and the third protrusion 68 described above do not overlap each other in the vertical direction. That is, in the state before the spout assembly 20 is attached to the container body 10, the second protrusion 38 and the third protrusion 68 do not overlap each other in the vertical direction. In other words, in the state before the spout assembly 20 is attached to the container body 10, the second protrusion 38 and the third protrusion 68 are offset in the vertical direction, and a gap is formed between the second protrusion 38 and the third protrusion 68 in the vertical direction. In this case, for example, when the thin-walled portion 61 is folded, the base portion 62 of the band portion 60 and the base portion 55 of the cap 50, which will be described later, may come into contact. In this way, because the second protrusion 38 and the third protrusion 68 do not overlap each other in the vertical direction, it is possible to prevent the third protrusion 68 of the band portion 60 from contacting the second protrusion 38 of the spout 30 when attaching the cap 50 to the spout 30. Therefore, it is possible to prevent the third protrusion 68 of the cap 50 from interfering with the second protrusion 38 of the spout 30 when attaching the cap 50 to the spout 30. As a result, it is possible to prevent the rotation of the band portion 60 relative to the spout 30 from being restricted, and it is possible to prevent only the cap cylinder portion 52 from rotating relative to the spout 30. This prevents the cap cylinder portion 52 from rotating relative to the band portion 60 when attaching the cap 50 to the spout 30. Therefore, it is possible to prevent the thin-walled portion 61 from unintentionally breaking.

[0093] On the other hand, as shown in Figure 13, when the spout assembly 20 is attached to the container body 10, the second protrusion 38 and the third protrusion 68 overlap each other in the vertical direction. In other words, in the container 1 with a spout, there is no gap between the second protrusion 38 and the third protrusion 68 in the vertical direction. That is, when the spout assembly 20 is attached to the container body 10, the flange portion 66 of the band portion 60 is pressed downward by the portion around the opening 11 of the container body 10. This pushes the band portion 60 down. In this way, the second protrusion 38 and the third protrusion 68 overlap each other in the vertical direction. Therefore, when the cap 50 is rotated in the opening direction (counterclockwise in a plan view), the third protrusion 68 of the band portion 60 can interfere with the second protrusion 38 of the spout 30.

[0094] Furthermore, in the cap 50 according to this modified example, a fifth projection 67 is formed on the band portion 60, which protrudes radially inward and engages with the fourth projection 37 from below. The fifth projection 67 engages with the fourth projection 37 of the spout 30 after the container 1 with the spout is initially opened, and plays a role in preventing the band portion 60 from being removed from the spout 30. This fifth projection 67 protrudes radially inward from the inner surface of the band portion 60 and is formed around its entire circumference. This effectively prevents the band portion 60 from being removed from the spout 30.

[0095] In the illustrated example, in the vertical cross-section, the upper surface of the fifth protrusion 67 slopes downward as it moves radially inward. On the other hand, the lower surface of the fifth protrusion 67 extends horizontally in the vertical cross-section. The shape of the fifth protrusion 67 may be any shape, as long as it is such that the fifth protrusion 67 can overcome the fourth protrusion 37 when the cap 50 is attached to the spout 30, and that the shape prevents the band portion 60 from being removed from the spout 30 after the container 1 with the spout is initially opened.

[0096] Furthermore, as shown in Figures 13 to 17, a base portion (second base portion) 55 is arranged on the lower surface of the cap cylinder portion 52. Multiple base portions 55 are arranged at intervals in the circumferential direction (for example, 12). Each base portion 55 protrudes toward the band portion 60. In this modified example, the number of base portions 62 arranged on the upper surface of the band portion 60 may be the same as the number of base portions 55.

[0097] The base portion 62 positioned on the upper surface of the band portion 60 and the base portion 55 positioned on the lower surface of the cap cylinder portion 52 overlap each other in the circumferential direction. In the illustrated example, the shapes of the base portion 62 and the base portion 55 facing each other in the vertical direction are equal, and the base portion 55 is positioned relative to the base portion 62 facing it in the vertical direction without any circumferential displacement. The base portion 55 may be in contact with the base portion 62.

[0098] Furthermore, as shown in Figure 17, at least one base portion 55 is positioned in a location that is not symmetrical with respect to the other base portions 55 with respect to the central axis CL of the cap 50 in a plan view. In the illustrated example, of the multiple base portions 55, one base portion 55a is positioned in a location that is not symmetrical with respect to the other base portions 55 with respect to the central axis CL. That is, there are no other base portions 55 that are symmetrical with respect to base portion 55a with respect to the central axis CL. Note that in Figure 17, the figure F that is symmetrical with respect to base portion 55a with respect to the central axis CL is shown by a dashed line.

[0099] Furthermore, as shown in Figure 12, in this modified example, four ribs 65 are provided on the outer surface of the band portion 60. The number of ribs 65 is arbitrary and may be one to three, or five or more. Also, in this modified example, the ribs 65 have a rectangular shape in plan view. However, it is not limited to this, and the ribs 65 may include a first surface 65a and a second surface 65b.

[0100] In this modified example, a second projection 38 projecting upward is formed on the upper surface of the flange portion 32, and a third projection 68 is formed on the band portion 60 that engages with the second projection 38 in the circumferential direction. As a result, even if the band portion 60 rotates together with the cap 50 when the cap 50 is rotated in the opening direction, the rotation of the band portion 60 can be restricted at a predetermined position. Therefore, the thin-walled portion 61 can be reliably broken when the container 1 with a spout is initially opened.

[0101] Furthermore, in this modified version, the second protrusion 38 and the third protrusion 68 do not overlap each other in the vertical direction. This prevents the third protrusion 68 of the band portion 60 from coming into contact with the second protrusion 38 of the spout 30 when the cap 50 is attached to the spout 30. As a result, it is possible to prevent the thin-walled portion 61 from unintentionally breaking.

[0102] Furthermore, according to this modified example, a fourth projection 37 is formed on the cylindrical portion 31, projecting radially outward, and a fifth projection 67 is formed on the band portion 60, projecting radially inward and engaging with the fourth projection 37 from below. This prevents the band portion 60 from being removed from the spout 30 after the container 1 with the spout has been initially opened.

[0103] Furthermore, in this modified example, a base portion 55 is positioned on the lower surface of the cap cylinder portion 52, and the base portion 62 and the base portion 55 overlap each other in the circumferential direction. Generally, when the cap cylinder portion 52 is attached to the spout 30 after the initial opening of the container with a spout 1, the circumferential position of the base portion 55 (base portion 62) relative to the spout 30 will be different from the circumferential position of the base portion 55 (base portion 62) relative to the spout 30 before the initial opening of the container with a spout 1. In other words, in this modified example, when the cap cylinder portion 52 is attached to the spout 30 after the initial opening of the container with a spout 1, the base portion 62 and the base portion 55 will be shifted in the circumferential direction. Therefore, in this modified example, by checking the positional relationship between the base portion 62 and the base portion 55, it is easy to determine whether or not the cap 50 has been opened improperly.

[0104] Furthermore, in this modified version, at least one base portion 55a is positioned in a location that is not symmetrical with respect to the central axis CL of the cap 50 in a plan view. This makes it even easier to determine whether the cap 50 has been improperly opened, for example, when the male screw 31a and female screw 52a are multi-start threads such as double-start threads. That is, if the threads of the female screw 52a that screw into the predetermined threads of the male screw 31a are different before and after opening the container 1 with a spout, the circumferential displacement between the base portion 62 and the base portion 55 can be increased. Therefore, in this modified version, it is easy to determine whether the cap 50 has been improperly opened by checking the positional relationship between the base portion 62 and the base portion 55.

[0105] Although an example has been described in which the band portion 60 includes a thick-walled portion 69a and a thin-walled portion 69b, and the third protrusion 68 protrudes downward from the lower surface of the thick-walled portion 69a, the example is not limited to this. For example, as shown in Figure 18, the band portion 60 does not have to include a thick-walled portion 69a and a thin-walled portion 69b, and the third protrusion 68 may protrude downward from the lower surface of the band portion 60 (flange portion 66). In this case as well, the thin-walled portion 61 can be reliably broken when the container 1 with a spout is initially opened. In the illustrated example, the fifth protrusion 67 is not formed on the band portion 60. Also, the base portion 55 is not arranged on the lower surface of the cap cylinder portion 52. However, the example is not limited to this, and the band portion 60 may have the fifth protrusion 67, and the base portion 55 may be arranged on the lower surface of the cap cylinder portion 52.

[0106] Furthermore, although an example in which the second projection 38 is formed on the upper surface of the flange portion 32 has been described, the invention is not limited to this. For example, as shown in Figure 19, the second projection 38 may be formed on the outer surface of the cylindrical portion 31. In this case, the second projection 38 protrudes radially outward. In the illustrated example, the second projection 38 is formed on the second cylindrical portion 34. The second projection 38 is connected to the flange portion 32 and is formed integrally with the flange portion 32. Note that the second projection 38 does not have to be connected to the flange portion 32, and a gap may be formed between the second projection 38 and the flange portion 32 in the vertical direction.

[0107] If the second projection 38 is formed on the outer surface of the cylindrical portion 31, the third surface 38a of the second projection 38 may extend radially from the outer surface of the cylindrical portion 31 in a plan view. The fourth surface 38b is provided on the side of the cap 50 that is opening (counterclockwise in a plan view) than the third surface 38a, and may extend circumferentially from the third surface 38a. The fifth surface 38c is provided on the side of the cap 50 that is opening (counterclockwise in a plan view) than the fourth surface 38b, and may extend from the fourth surface 38b to the outer surface of the cylindrical portion 31.

[0108] Furthermore, as shown in Figure 20, the third projection 68 may be formed on the inner surface of the band portion 60. In this case, the third projection 68 protrudes radially inward. In the illustrated example, the third projection 68 extends from the lower surface of the fifth projection 67 of the band portion 60 to the lower surface of the flange portion 66 of the band portion 60. Note that the third projection 68 may be formed only in a portion of the area from the lower surface of the fifth projection 67 to the lower surface of the flange portion 66 in the vertical direction.

[0109] If the third projection 68 is formed on the inner surface of the band portion 60, the sixth surface 68a of the third projection 68 may extend radially from the inner surface of the band portion 60 in a plan view. The seventh surface 68b is provided on the side of the cap 50 that is closing (clockwise in a plan view) than the sixth surface 68a, and may extend from the sixth surface 68a to the inner surface of the band portion 60.

[0110] Thus, even when the second protrusion 38 is formed on the outer surface of the cylindrical portion 31, the thin-walled portion 61 can be reliably broken when the container 1 with a spout is initially opened.

[0111] (Third variation) Furthermore, in the above-described embodiment, an example was described in which the base portion 62 is arranged on the upper surface of the band portion 60. In this case, as shown in Figure 21, a first claw portion 62a that protrudes upward may be formed on the upper surface of the band portion 60.

[0112] The first claw portion 62a, by engaging with the second claw portion 55b described later, plays a role in preventing the thin-walled portion 61 from unintentionally breaking. That is, for example, in the spout assembly 20, if the second protrusion 38 of the spout 30 and the third protrusion 68 of the band portion 60 overlap each other in the vertical direction, when the cap 50 is attached to the spout 30, the third protrusion 68 of the band portion 60 may come into contact with the second protrusion 38 of the spout 30. In this way, when the cap 50 is attached to the spout 30, if the third protrusion 68 comes into contact with the second protrusion 38, the rotation of the band portion 60 relative to the spout 30 is restricted, and only the cap cylinder portion 52 may rotate relative to the spout 30. In this case, the cap cylinder portion 52 will rotate relative to the band portion 60, and the thin-walled portion 61 may unintentionally break.

[0113] In contrast, in this modified example, even if the third protrusion 68 comes into contact with the second protrusion 38 when the cap 50 is attached to the spout 30, the first claw portion 62a and the second claw portion 55b, which will be described later, engage with each other. As a result, the band portion 60 follows the rotation of the cap cylinder portion 52. That is, even if the third protrusion 68 comes into contact with the second protrusion 38 when the cap 50 is attached to the spout 30, the band portion 60 rotates with the cap cylinder portion 52 relative to the spout 30. In other words, the engagement of the first claw portion 62a and the second claw portion 55b allows the band portion 60 to follow the rotation of the cap cylinder portion 52, and the third protrusion 68 to overcome the second protrusion 38. This configuration prevents the thin-walled portion 61 from unintentionally breaking.

[0114] In the illustrated example, multiple (two) first claw portions 62a are formed on the upper surface of the band portion 60. The number of first claw portions 62a is arbitrary; there may be one or three or more.

[0115] The first claw portion 62a does not overlap the base portion 55 in the vertical direction. Therefore, the first claw portion 62a does not contact the cap cylinder portion 52, and a gap is formed between the first claw portion 62a and the cap cylinder portion 52 in the vertical direction. In the illustrated example, the upper surface of the first claw portion 62a, the upper surface of the base portion 62, and the lower surface of the base portion 55 are located on the same plane. In this case, the height (vertical distance) of the first claw portion 62a is equal to the height (vertical distance) of the base portion 62. However, the height of the first claw portion 62a may be lower than the height of the base portion 62.

[0116] Furthermore, a second claw portion 55b protruding downward may be formed on the lower surface of the cap cylinder portion 52. In this modified example, as shown in Figure 22, the second claw portion 55b plays a role in increasing the circumferential displacement between the base portion 55 and the base portion 62 after the initial opening of the container 1 with a spout. That is, in this modified example, when the cap cylinder portion 52 is attached to the spout 30 after the initial opening of the container 1 with a spout, the second claw portion 55b may come into contact with the base portion 62. In this case, the band portion 60 may rotate relative to the spout 30 so as to follow the rotation of the cap cylinder portion 52. That is, the band portion 60 may rotate relative to the spout 30 together with the cap cylinder portion 52. Thus, when the second claw portion 55b contacts the base portion 62, causing the band portion 60 to rotate with the cap cylinder portion 52 relative to the spout portion 30, the circumferential position of the base portion 55 relative to the base portion 62 after the initial opening of the container with spout 1 (see Figure 21) will be significantly different from the circumferential position of the base portion 55 relative to the base portion 62 before the initial opening of the container with spout 1 (see Figure 22). Therefore, as shown in Figure 22, the circumferential displacement between the base portion 55 and the base portion 62 becomes large after the initial opening of the container with spout 1.

[0117] In the illustrated example, one second claw portion 55b is formed on the lower surface of the cap cylinder portion 52. The number of second claw portions 55b is arbitrary and may be two or more.

[0118] The second claw portion 55b may overlap the base portion 62 in the vertical direction. This allows the second claw portion 55b to contact the base portion 62 when the cap cylinder portion 52 is attached to the spout 30 after the initial opening of the container 1 with a spout. In this modified example, the height (vertical distance) of the second claw portion 55b is greater than the height (vertical distance) of the base portion 55.

[0119] Furthermore, the second claw portion 55b may overlap the first claw portion 62a in the vertical direction. Also, the second claw portion 55b may be located between the first claw portions 62a in the circumferential direction. In this case, the second claw portion 55b may be in contact with the band portion 60.

[0120] In this modified example, a first claw portion 62a protruding upward is formed on the upper surface of the band portion 60. In addition, a second claw portion 55b protruding downward is formed on the lower surface of the cap cylinder portion 52. As a result, even if the third protrusion 68 comes into contact with the second protrusion 38 when the cap 50 is attached to the spout 30, the first claw portion 62a and the second claw portion 55b engage with each other, allowing the band portion 60 to follow the rotation of the cap cylinder portion 52. Therefore, the third protrusion 68 can overcome the second protrusion 38. As a result, unintentional breakage of the thin-walled portion 61 can be suppressed.

[0121] Furthermore, the second claw portion 55b overlaps the base portion 62 in the vertical direction. As a result, when the cap cylinder portion 52 is attached to the spout 30 after the initial opening of the container with spout 1, the second claw portion 55b may come into contact with the base portion 62. In this case, the band portion 60 may rotate relative to the spout 30 in accordance with the rotation of the cap cylinder portion 52. In this way, when the band portion 60 rotates relative to the spout 30 together with the cap cylinder portion 52 due to the contact of the second claw portion 55b with the base portion 62, the circumferential position of the base portion 55 relative to the base portion 62 after the initial opening of the container with spout 1 will be significantly different from the circumferential position of the base portion 55 relative to the base portion 62 before the initial opening of the container with spout 1. Therefore, the circumferential displacement between the base portion 55 and the base portion 62 becomes large after the initial opening of the container with spout 1. As a result, according to this modified version, it is possible to more easily determine whether or not the cap 50 has been opened improperly by checking the positional relationship between the base portion 62 and the base portion 55.

[0122] Although an example has been described in which the first claw portion 62a does not overlap the base portion 55 in the vertical direction, the example is not limited to this. For example, as shown in Figure 23, the first claw portion 62a may overlap the base portion 55 in the vertical direction. This allows the base portion 55 to come into contact with the first claw portion 62a when the cap cylinder portion 52 is attached to the spout 30 after the initial opening of the container 1 with a spout. In the illustrated example, the height (vertical distance) of the first claw portion 62a is greater than the height (vertical distance) of the base portion 62. Also, the first claw portion 62a may overlap the second claw portion 55b in the vertical direction. In this case, the first claw portion 62a may be in contact with the cap cylinder portion 52.

[0123] Furthermore, in this case, the second claw portion 55b does not have to overlap the base portion 62 in the vertical direction. Therefore, the second claw portion 55b does not have to be in contact with the band portion 60, and a gap may be formed between the second claw portion 55b and the band portion 60 in the vertical direction. In the illustrated example, the lower surface of the second claw portion 55b, the lower surface of the base portion 55, and the upper surface of the base portion 62 are located on the same plane. In this case, the height (vertical distance) of the second claw portion 55b is equal to the height (vertical distance) of the base portion 55. Note that the height of the second claw portion 55b may be lower than the height of the base portion 55.

[0124] Thus, when the first claw portion 62a overlaps the base portion 55 in the vertical direction, the base portion 55 may come into contact with the first claw portion 62a when the cap cylinder portion 52 is attached to the spout 30 after the initial opening of the container with spout 1. In this case, the band portion 60 may rotate relative to the spout 30 to follow the rotation of the cap cylinder portion 52. In this way, even when the base portion 55 comes into contact with the first claw portion 62a, the circumferential position of the base portion 55 relative to the base portion 62 after the initial opening of the container with spout 1 can be made to be significantly different from the circumferential position of the base portion 55 relative to the base portion 62 before the initial opening of the container with spout 1. Therefore, by checking the positional relationship between the base portion 62 and the base portion 55, it is possible to more easily determine whether or not the cap 50 has been opened improperly.

[0125] (Fourth variation) Furthermore, in the above-described embodiment, when attaching the cap 50 to the spout 30, an example was described in which the female thread 52a of the cap 50 is screwed onto the male thread 31a of the spout 30 by rotating the cap 50 relative to the spout 30, but the embodiment is not limited to this. For example, when attaching the cap 50 to the spout 30, the female thread 52a may be screwed onto the male thread 31a by pressing it into place.

[0126] In this modified example, when manufacturing the spout assembly 20, as shown in Figure 24(a), the female thread 52a is screwed onto the male thread 31a by pressing it into place. In this case, the cap 50 is not rotated relative to the spout 30, but rather pressed onto the spout 30 from above. As a result, as shown in Figure 24(b), the cap 50 is attached to the spout 30, and the spout assembly 20 is obtained.

[0127] According to this modified example, when attaching the cap 50 to the spout 30, the female thread 52a is screwed onto the male thread 31a by pressing it into place. That is, when attaching the cap 50 to the spout 30, the cap 50 is attached to the spout 30 without rotating it relative to the spout 30. This prevents the third protrusion 68 of the cap 50 from interfering with the second protrusion 38 of the spout 30 when attaching the cap 50 to the spout 30. Therefore, it is possible to prevent the thin-walled portion 61 from unintentionally breaking. Furthermore, by attaching the cap 50 to the spout 30 without rotating it relative to the spout 30, the cap 50 can be attached to the spout 30 so that the circumferential position of the third protrusion 68 relative to the second protrusion 38 is at the desired position. Therefore, it is possible to prevent variations in the opening angle of the spout assembly 20.

[0128] (Fifth variation) Furthermore, in the above-described embodiment, when attaching the cap 50 to the spout 30, an example was described in which the female thread 52a of the cap 50 is screwed onto the male thread 31a of the spout 30 by rotating the cap 50 relative to the spout 30. In this case, for example, a first stopper 40 that restricts the rotation of the cap 50 in the closing direction may be provided on the cylindrical portion 31.

[0129] As shown in Figures 25 to 27, in the spout 30 of this modified example, a first stopper 40 is provided on the cylindrical portion 31 to restrict the rotation of the cap 50 in the closing direction. In the illustrated example, the first stopper 40 is connected to the male screw 31a and is integrally formed with the first cylindrical portion 33 of the cylindrical portion 31. By connecting the first stopper 40 to the male screw 31a in this way, the rigidity of the first stopper 40 can be increased. This first stopper 40 protrudes radially outward from the outer surface of the first cylindrical portion 33. The first stopper 40 is the part that, when closing the container 1 with a spout, comes into contact with the second stopper 56 of the cap 50 (described later), thereby suppressing the rotation of the cap 50. In the illustrated example, two first stoppers 40 are provided (see Figures 26 and 27). Note that the first stopper 40 does not necessarily have to be connected to the male screw 31a. Furthermore, the number of first stoppers 40 is arbitrary; for example, there may be one, or there may be three or more. Also, the number of first stoppers 40 may be the same as the number of threads in the male screw 31a, or it may be different from the number of threads in the male screw 31a.

[0130] Furthermore, as shown in Figure 27, the first stopper 40 includes a locking surface 40a. In a plan view, the locking surface 40a extends radially. In this way, because the first stopper 40 includes a locking surface 40a, when the cap 50 is rotated in the closing direction (clockwise in a plan view), the second stopper 56 of the cap 50, which will be described later, is more likely to interfere with the locking surface 40a of the first stopper 40. This prevents the cap 50 from being overtightened when rotated in the closing direction. Therefore, it is possible to prevent the container with a spout 1 from becoming difficult to open. In addition, because it is possible to prevent the cap 50 from being overtightened, the rotation angle of the cap cylinder 52 can be stabilized until the thin-walled portion 61 is broken when initially opening the container with a spout 1.

[0131] As shown in Figures 25, 26, and 28, in the spout 30 of this modified example, a third stopper 41 is provided on the cylindrical portion 31 to restrict the rotation of the cap 50 in the closing direction. In the illustrated example, the third stopper 41 is formed on the second cylindrical portion 34. This third stopper 41 protrudes radially outward from the outer surface of the second cylindrical portion 34. In this case, the third stopper 41 may also be composed of the second protruding portion 38 described above. The third stopper 41 is the part that suppresses the rotation of the cap 50 when the fourth stopper 70 of the band portion 60, which will be described later, comes into contact with the spout container 1. In the illustrated example, four third stoppers 41 are provided (see Figure 28). The number of third stoppers 41 is arbitrary; for example, there may be one to three or more, or five or more.

[0132] Furthermore, as shown in Figure 28, the fifth surface 38c of the second projection 38 constituting the third stopper 41 extends radially in a plan view. As a result, when the cap 50 is rotated in the closing direction (clockwise in a plan view), the fourth stopper 70 of the band portion 60, which will be described later, is more likely to interfere with the fifth surface 38c of the second projection 38 (third stopper 41). This restricts the movement of the band portion 60 in the closing direction of the cap 50 when the cap 50 is rotated in the closing direction.

[0133] Next, the modified cap 50 will be described. As shown in Figures 26 and 27, in the modified cap 50, a second stopper 56 that engages with the first stopper 40 is provided on the cap cylinder portion 52. In the illustrated example, the second stopper 56 is made up of the female screw 52a described above. This second stopper 56 is a part that suppresses the rotation of the cap 50 by contacting the first stopper 40 in the circumferential direction. That is, the second stopper 56 is a part that suppresses the rotation of the cap 50 by contacting the first stopper 40 of the spout 30 when closing the container 1 with a spout. This prevents the cap 50 from being overtightened when it is rotated in the closing direction, and prevents the container 1 with a spout from becoming difficult to open. Also, because it prevents the cap 50 from being overtightened, the rotation angle of the cap cylinder portion 52 can be stabilized until the thin-walled portion 61 is broken when initially opening the container 1 with a spout. In the illustrated example, two second stoppers 56 are provided. The number of second stoppers 56 is arbitrary; for example, there may be one, or there may be three or more.

[0134] Furthermore, as shown in Figure 27, the second stopper 56 includes a locking surface 56a. In a plan view, the locking surface 56a extends radially. Thus, because the second stopper 56 includes a locking surface 56a, when the cap 50 is rotated in the closing direction (clockwise in a plan view), the second stopper 56 of the cap 50 is more likely to interfere with the locking surface 40a of the first stopper 40.

[0135] Furthermore, as shown in Figures 26, 28, and 29, in the cap 50 according to this modified example, a fourth stopper 70 that engages with the third stopper 41 is provided on the band portion 60. The fourth stopper 70 protrudes radially inward. The fourth stopper 70 is the part that suppresses the rotation of the band portion 60 by contacting the third stopper 41 of the spout 30 when closing the container 1 with a spout. In the illustrated example, four fourth stoppers 70 are provided (see Figure 28). The number of fourth stoppers 70 is arbitrary; for example, there may be one to three, or five or more.

[0136] Furthermore, as shown in Figure 28, the fourth stopper 70 includes a locking surface 70a. In a plan view, the locking surface 70a extends radially. Thus, because the fourth stopper 70 includes a locking surface 70a, when the cap 50 is rotated in the closing direction (clockwise in a plan view), the fourth stopper 70 of the band portion 60 is more likely to interfere with the fifth surface 38c of the second projection 38 (third stopper 41).

[0137] Here, as shown in Figure 30, in this modified example, the first claw portion 62a and the second claw portion 55b may overlap each other in the vertical direction. This allows the second claw portion 55b to interfere with the first claw portion 62a when the cap 50 is rotated in the closing direction (clockwise in a plan view). Therefore, when closing the container 1 with a spout, even if the fourth stopper 70 of the band portion 60 comes into contact with the third stopper 41 of the spout 30 before the second stopper 56 of the cap cylinder portion 52 comes into contact with the first stopper 40 of the spout 30, the rotation of the cap cylinder portion 52 relative to the band portion 60 can be suppressed. In other words, even if the fourth stopper 70 of the band portion 60 contacts the third stopper 41 of the spout 30 before the second stopper 56 of the cap cylinder portion 52 contacts the first stopper 40 of the spout 30, the second claw portion 55b interferes with the first claw portion 62a, thereby preventing the cap cylinder portion 52 from rotating relative to the band portion 60. This prevents the thin-walled portion 61 from unintentionally breaking.

[0138] As shown in Figure 31, a gap may be formed in the circumferential direction between the first claw portion 62a and the second claw portion 55b of the cap 50 before it is attached to the spout 30. In this case, the first claw portion 62a may be in contact with the cap cylinder portion 52, and the second claw portion 55b may be in contact with the band portion 60 of the cap 50 after it has been removed from the mold of an injection molding machine (not shown). On the other hand, as described above, the cap 50 can be manufactured, for example, by injection molding. In this case, as shown in Figure 32, the first claw portion 62a and the second claw portion 55b, which are formed at positions corresponding to the parting line PL of the mold, may be in contact with each other in the circumferential direction of the cap 50 after it has been removed from the mold of an injection molding machine (not shown). In this case, a gap may be formed in the vertical direction between the first claw portion 62a and the cap cylinder portion 52. Also, a gap may be formed in the vertical direction between the second claw portion 55b and the band portion 60. As described above, in this modified configuration, by configuring the first claw portion 62a and the second claw portion 55b to be in contact with each other in the circumferential direction, the first claw portion 62a and the second claw portion 55b can be formed at positions corresponding to the parting line PL. In this case, it is also easier to arrange multiple first claw portions 62a at equal intervals in the circumferential direction. Similarly, it is easier to arrange multiple second claw portions 55b at equal intervals in the circumferential direction. As a result, when the cap cylinder portion 52 attempts to rotate relative to the band portion 60, the rotational force that the second claw portion 55b applies to the first claw portion 62a can be distributed substantially evenly among the multiple first claw portions 62a. Therefore, distortion in the band portion 60 can be suppressed.

[0139] In this modified version, a first stopper 40 is provided on the cylindrical portion 31 to restrict the rotation of the cap 50 in the closing direction, and a second stopper 56 is provided on the cap cylinder portion 52 to engage with the first stopper 40. This prevents the cap 50 from being overtightened when rotated in the closing direction. Therefore, it is possible to prevent the container with a spout 1 from becoming difficult to open. In addition, because it is possible to prevent the cap 50 from being overtightened, the rotation angle of the cap cylinder portion 52 can be stabilized until the thin-walled portion 61 is broken when initially opening the container with a spout 1.

[0140] Furthermore, according to this modified version, the cylindrical portion 31 is provided with a third stopper 41 that restricts the rotation of the cap 50 in the closing direction, and the band portion 60 is provided with a fourth stopper 70 that engages with the third stopper 41. This prevents the cap 50 from being overtightened when rotated in the closing direction. Therefore, it is possible to prevent the container with a spout 1 from becoming difficult to open. In addition, the first claw portion 62a and the second claw portion 55b overlap each other in the vertical direction. This prevents the cap cylindrical portion 52 from rotating relative to the band portion 60, even if the fourth stopper 70 of the band portion 60 contacts the third stopper 41 of the spout 30 before the second stopper 56 of the cap cylindrical portion 52 contacts the first stopper 40 of the spout 30 when closing the container with a spout 1. Therefore, it is possible to prevent the thin-walled portion 61 from unintentionally breaking.

[0141] It is also possible to combine the multiple components disclosed in each of the above embodiments and variations as needed. Alternatively, some components may be removed from all the components shown in each of the above embodiments and variations. As an example, in the above-described embodiment, an example in which a rib 65 is provided on the outer surface of the band portion 60 was described, but the rib 65 is not required to be provided on the outer surface of the band portion 60. Also, as an example, in the above-described fifth variation, an example was described in which a first stopper 40 and a third stopper 41 are provided on the cylindrical portion 31, a second stopper 56 is provided on the cap cylinder portion 52, and a fourth stopper 70 is provided on the band portion 60. However, it is not limited to this, and the third stopper 41 is not required on the cylindrical portion 31, nor is the fourth stopper 70 required on the band portion 60. Even in this case, by providing the first stopper 40 on the cylindrical portion 31 and the second stopper 56 on the cap cylinder portion 52, it is possible to prevent the cap 50 from being overtightened when the cap 50 is rotated in the closing direction. Furthermore, the cylindrical portion 31 does not necessarily have to have a first stopper 40, and the cap cylinder portion 52 does not necessarily have to have a second stopper 56. In this case as well, the presence of a third stopper 41 on the cylindrical portion 31 and a fourth stopper 70 on the band portion 60 prevents the cap 50 from being overtightened when it is rotated in the closing direction. In this case, the first claw portion 62a and the second claw portion 55b overlap each other in the vertical direction, which prevents the cap cylinder portion 52 from rotating relative to the band portion 60. This prevents the thin-walled portion 61 from unintentionally breaking. [Explanation of Symbols]

[0142] 1. Container with spout 10 Container body 11 Aperture 20 Spout assembly 30 spout 31a Male screw 31 Cylindrical section 32 Flange section 37 4th protrusion 38 Second protrusion 40 First Stopper 41 Third Stopper 50 caps 51 Heavenly Beings 52 Cap cylinder 52a Female thread 55 Base 55a Base 55b Second claw portion 56 Second Stopper 60 Band Section 61 Thin-walled section 62 Base 62a First claw portion 63 1st protrusion 65 Rib 65a 1st page 65b 2nd side 66 Flange section 67 5th protrusion 68 Third protrusion 70. 4th Stopper

Claims

1. A spout assembly to be attached to a container body having an opening, A spout having a cylindrical portion with male threads formed on its outer surface and a first flange portion located below the cylindrical portion, The cap comprises a top portion, a cap cylinder portion extending from the top portion and having a female thread formed on its inner surface that screws onto the male thread of the spout, and a band portion connected to the cap cylinder portion via a thin-walled portion. A second flange portion is provided at the lower end of the band portion, projecting radially outward. The outer surface of the band portion is provided with ribs that protrude radially outward. The aforementioned rib abuts against the edge of the opening from the radially inner side to suppress the rotation of the band portion in the spout assembly.

2. The spout assembly according to claim 1, wherein a first projection is formed above the second flange portion, projecting radially outward.

3. The spout assembly according to claim 2, wherein a first base portion is positioned on the upper surface of the band portion, and the first protrusion protrudes radially outward from the first base portion.

4. A spout having a cylindrical portion with male threads formed on its outer surface and a first flange portion located below the cylindrical portion, The cap comprises a top portion, a cap cylinder portion extending from the top portion and having a female thread formed on its inner surface that screws onto the male thread of the spout, and a band portion connected to the cap cylinder portion via a thin-walled portion. A second flange portion is provided at the lower end of the band portion, projecting radially outward. A first projection is formed above the second flange portion, projecting radially outward. A spout assembly wherein a first base portion is positioned on the upper surface of the band portion, and the first protrusion protrudes radially outward from the first base portion.

5. The spout assembly according to claim 2, wherein in a vertical cross-section, the upper surface of the first projection is curved such that it slopes downward or becomes convex toward the radially outward direction.

6. The spout assembly according to claim 1, wherein the ribs extend in the vertical direction.

7. The spout assembly according to claim 1, wherein, in a plan view, the rib includes a first surface extending radially and a second surface provided on the side of the cap that is closer to the closing direction than the first surface, and extending from the first surface to the outer surface of the band portion.

8. A spout having a cylindrical portion with male threads formed on its outer surface and a first flange portion located below the cylindrical portion, The cap comprises a top portion, a cap cylinder portion extending from the top portion and having a female thread formed on its inner surface that screws onto the male thread of the spout, and a band portion connected to the cap cylinder portion via a thin-walled portion. A second flange portion is provided at the lower end of the band portion, projecting radially outward. The outer surface of the band portion is provided with ribs that protrude radially outward. In a plan view, the spout assembly includes a first surface extending radially and a second surface provided on the closing side of the cap from the first surface and extending from the first surface to the outer surface of the band portion.

9. The spout assembly according to claim 1, wherein a plurality of ribs are provided along the circumferential direction.

10. The spout assembly according to claim 9, wherein the plurality of ribs are arranged at equal intervals in the circumferential direction.

11. The spout assembly according to claim 1, wherein a first base portion is positioned on the upper surface of the band portion, a second base portion is positioned on the lower surface of the cap cylinder portion, and the first base portion and the second base portion overlap each other in the circumferential direction.

12. A spout having a cylindrical portion with male threads formed on its outer surface and a first flange portion located below the cylindrical portion, The cap comprises a top portion, a cap cylinder portion extending from the top portion and having a female thread formed on its inner surface that screws onto the male thread of the spout, and a band portion connected to the cap cylinder portion via a thin-walled portion. A second flange portion is provided at the lower end of the band portion, projecting radially outward. A spout assembly wherein a first base portion is positioned on the upper surface of the band portion, a second base portion is positioned on the lower surface of the cap cylinder portion, and the first base portion and the second base portion overlap each other in the circumferential direction.

13. The spout assembly according to claim 12, wherein a plurality of the second base portions are arranged, and at least one of the second base portions is positioned in a location that is not symmetrical with respect to the other second base portions with respect to the central axis of the cap in a plan view.

14. The spout assembly according to claim 12, wherein a first claw portion protruding upward is formed on the upper surface of the band portion, and a second claw portion protruding downward is formed on the lower surface of the cap cylinder portion, and the second claw portion overlaps the first base portion in the vertical direction.

15. The spout assembly according to claim 12, wherein a first claw portion protruding upward is formed on the upper surface of the band portion, and a second claw portion protruding downward is formed on the lower surface of the cap cylinder portion, and the first claw portion overlaps the second base portion in the vertical direction.

16. The spout assembly according to claim 1, wherein a second projection projecting upward is formed on the upper surface of the first flange portion, and a third projection engaging with the second projection in the circumferential direction is formed on the band portion.

17. The spout assembly according to claim 1, wherein a second projection is formed on the outer surface of the cylindrical portion, projecting radially outward, and a third projection is formed on the band portion, engaging with the second projection in the circumferential direction.

18. The spout assembly according to claim 16, wherein the second and third protrusions do not overlap each other in the vertical direction.

19. The spout assembly according to claim 16, wherein a fourth projection is formed on the cylindrical portion, projecting radially outward, and a fifth projection is formed on the band portion, projecting radially inward and engaging with the fourth projection from below.

20. The spout assembly according to claim 1, wherein the cylindrical portion is provided with a first stopper that restricts the rotation of the cap in the closing direction, and the cap cylinder portion is provided with a second stopper that engages with the first stopper.

21. The spout assembly according to claim 1, wherein the cylindrical portion is provided with a third stopper that restricts the rotation of the cap in the closing direction, the band portion is provided with a fourth stopper that engages with the third stopper, a first claw portion that protrudes upward is formed on the upper surface of the band portion, a second claw portion that protrudes downward is formed on the lower surface of the cap cylinder portion, and the first claw portion and the second claw portion overlap each other in the vertical direction.

22. A spout having a cylindrical portion with male threads formed on its outer surface and a first flange portion located below the cylindrical portion, The cap comprises a top portion, a cap cylinder portion extending from the top portion and having a female thread formed on its inner surface that screws onto the male thread of the spout, and a band portion connected to the cap cylinder portion via a thin-walled portion. A second flange portion is provided at the lower end of the band portion, projecting radially outward. A spout assembly comprising a cylindrical portion provided with a third stopper that restricts the rotation of the cap in the closing direction, a band portion provided with a fourth stopper that engages with the third stopper, a first claw portion that protrudes upward formed on the upper surface of the band portion, a second claw portion that protrudes downward formed on the lower surface of the cap cylinder portion, and the first claw portion and the second claw portion overlap each other in the vertical direction.

23. A container body with an opening, A container with a spout, comprising a spout assembly according to any one of claims 1 to 22, which is attached to the container body and closes the opening.

24. The band portion is inserted into the opening, The container with a spout according to claim 23, wherein the second flange portion is sandwiched between the container body and the first flange portion.

25. A container body with an opening, The container body is fitted with the spout assembly according to any one of claims 16 to 19, which closes the opening, The band portion is inserted into the opening, The second flange portion is sandwiched between the container body and the first flange portion. A container with a spout, wherein the second and third protrusions overlap each other in the vertical direction.

26. A method for manufacturing a spout assembly to be attached to a container body having an opening, A step of preparing a spout having a cylindrical portion with male threads formed on its outer surface and a first flange portion located below the cylindrical portion, A step of preparing a cap having a top portion, a cap cylinder portion extending from the top portion and having a female thread formed on its inner surface that screws onto the male thread of the spout, and a band portion connected to the cap cylinder portion via a thin-walled portion, The process includes the step of attaching the cap to the spout, In the step of attaching the cap to the spout, the female thread is screwed onto the male thread by rotating the cap relative to the spout. A second flange portion is provided at the lower end of the band portion, projecting radially outward. The outer surface of the band portion is provided with ribs that protrude radially outward. A method for manufacturing a spout assembly, wherein the rib abuts against the edge of the opening from the radially inner side to suppress the rotation of the band portion.

27. ​​A method for manufacturing a spout assembly to be attached to a container body having an opening, A step of preparing a spout having a cylindrical portion with male threads formed on its outer surface and a first flange portion located below the cylindrical portion, A step of preparing a cap having a top portion, a cap cylinder portion extending from the top portion and having a female thread formed on its inner surface that screws onto the male thread of the spout, and a band portion connected to the cap cylinder portion via a thin-walled portion, The process includes the step of attaching the cap to the spout, In the step of attaching the cap to the spout, the female thread is screwed onto the male thread by pressing the cap into place. A second flange portion is provided at the lower end of the band portion, projecting radially outward. The outer surface of the band portion is provided with ribs that protrude radially outward. A method for manufacturing a spout assembly, wherein the rib abuts against the edge of the opening from the radially inner side to suppress the rotation of the band portion.

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