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

Abstract

To provide a spout assembly, a container with a spout, and a method for manufacturing a spout assembly which prevent alteration of a content, and enable opening of a cap.SOLUTION: A spout assembly 20 includes a cylindrical part 31, a spout 30 having a flange part 32 positioned below the cylindrical part 31, a cap cylindrical part 52, and a cap 50 having a band part 60 connected to the cap cylinder part 52 through a thin wall part 61. On the outer surface of the cylindrical part 31, a first projection part 36 projecting radially outward, and a second projection part 37 which is positioned above the first projection part 36 and projects radially outward are formed. In the band part 60, a third projection part 66 which projects radially outward and is engaged with the first projection part 36 in the circumferential direction, and a fourth projection part 67 which projects radially inward and is engaged with the second projection part 37 from below are formed.SELECTED DRAWING: Figure 6

Description

Technical Field

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

Background Art

[0002] Conventionally, a spout attached to a container has been known (for example, Patent Document 1). In Patent Document 1, a spout plug and a packaging container are disclosed that 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 spout plug is provided with a band portion that is a tamper-evidence band that can be detached from the cap by breaking a thin portion when opening the plug. [[ID=!]]

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 spout is attached, when a plurality of containers are arranged side by side, it may be required that the spout attached to one container and the spout attached to another container do not interfere with each other. Further, it may be required that the spout 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 spout below a predetermined height. Generally, the container body is attached below the band portion. For this reason, there is a possibility that 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] Note: There seems to be an error in the numbering in the original text where "!" is used instead of correct numbers in some places. I've translated it as is while highlighting those parts for your reference. You may want to correct those in the original for a more accurate translation.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 flange portion located below the cylindrical portion, a cap having a top portion and 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 the outer surface of the cylindrical portion has a first projection projecting radially outward and a second projection located above the first projection and projecting radially outward, and the band portion has a third projection projecting radially inward and engaging with the first projection in the circumferential direction and a fourth projection projecting radially inward and engaging with the second projection from below.

[0007] A second 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 flange portion located below the cylindrical portion, a cap having a top portion and 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 first projection projecting upward is formed on the upper surface of the flange portion, a second projection projecting radially outward is formed on the outer surface of the cylindrical portion and located above the first projection, and a third projection projecting radially inward and engaging with the second projection from below is formed on the band portion.

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

[0009] A fourth aspect of the present disclosure is the spout assembly according to the third aspect described above, wherein there may be a plurality of second base portions, and at least one of the second base portions may be 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.

[0010] A fifth aspect of the present disclosure is a spout assembly according to the third or fourth aspect 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 second claw portion may overlap the first base portion in the vertical direction.

[0011] A sixth aspect of the present disclosure is a spout assembly according to each of the third to fifth 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.

[0012] A seventh aspect of the present disclosure is a spout assembly according to each of the first to sixth aspects described above, wherein a first claw portion projecting upward is formed on the upper surface of the band portion, a second claw portion projecting downward is formed on the lower surface of the cap cylinder portion, and a projection projecting upward and deformable in the opening direction of the cap is formed on the first claw portion.

[0013] An eighth aspect of the present disclosure is a spout assembly according to each of the first to seventh aspects described above, wherein a first claw portion projecting upward and a recess may be formed on the upper surface of the band portion, and a second claw portion projecting downward may be formed on the lower surface of the cap cylinder portion, at least a part of the first claw portion may overlap the recess in the circumferential direction, and when the cap is rotated in the opening direction, the second claw portion may come into contact with the first claw portion, thereby housing at least a part of the first claw portion in the recess.

[0014] A ninth aspect of the present disclosure is the spout assembly according to the eighth aspect described above, wherein a retaining portion for holding the first claw portion is formed in the recess.

[0015] A tenth aspect of the present disclosure is a spout assembly according to each of the first to ninth aspects described above, wherein the cylindrical portion is provided with a first stopper that restricts the rotation of the cap in the closing direction, the band portion is provided with a second stopper that engages with the first stopper, the upper surface of the band portion is provided with a first claw portion that protrudes upward, the lower surface of the cap cylinder portion is provided with a second claw portion that protrudes downward, and the first claw portion and the second claw portion are to overlap each other in the vertical direction.

[0016] An eleventh aspect of the present disclosure is a container with a spout, comprising a container body having an opening, and a spout assembly attached to the container body and closing the opening, according to each of the first to tenth aspects described above.

[0017] A twelfth aspect of this disclosure is a container with a spout according to the eleventh aspect described above, wherein the band portion may be inserted into the opening.

[0018] A thirteenth aspect of the present disclosure is a method for manufacturing a spout assembly, comprising the steps of: preparing a spout having a cylindrical portion with male threads formed on its outer surface and a flange portion located below the cylindrical portion; preparing 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 engage with the male threads of the spout; and a band portion connected to the cap cylinder portion via a thin-walled portion; and attaching the cap to the spout, wherein in the step of attaching the cap to the spout, the cap is rotated relative to the spout to screw the female threads onto the male threads, thereby forming a first projection projecting radially outward on the outer surface of the cylindrical portion and a second projection located above the first projection projecting radially outward, and forming a third projection projecting radially inward and engaging with the first projection in the circumferential direction, and forming a fourth projection projecting radially inward and engaging with the second projection from below on the band portion.

[0019] A fourteenth aspect of the present disclosure is a method for manufacturing a spout assembly, comprising the steps of: preparing a spout having a cylindrical portion with male threads formed on its outer surface and a flange portion located below the cylindrical portion; preparing 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 engage with the male threads of the spout, and a band portion connected to the cap cylinder portion via a thin-walled portion; and attaching the cap to the spout, wherein in the step of attaching the cap to the spout, the cap is rotated relative to the spout to screw the female threads onto the male threads, thereby forming a first projection that protrudes upward on the upper surface of the flange portion, a second projection that is located above the first projection and protrudes radially outward on the outer surface of the cylindrical portion, and a third projection that engages with the first projection in the circumferential direction and a fourth projection that protrudes radially inward and engages with the second projection from below on the band portion.

[0020] A fifteenth aspect of the present disclosure is a method for manufacturing a spout assembly, comprising the steps of: preparing a spout having a cylindrical portion with male threads formed on its outer surface and a flange portion located below the cylindrical portion; preparing 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 engage with the male threads of the spout; and a band portion connected to the cap cylinder portion via a thin-walled portion; and attaching the cap to the spout, wherein in the step of attaching the cap to the spout, the female threads are screwed onto the male threads by pressing in a stopper, and a first projection projecting radially outward is formed on the outer surface of the cylindrical portion, and a second projection located above the first projection projecting radially outward is formed, and a third projection projecting radially inward and engaging with the first projection in the circumferential direction is formed on the band portion, and a fourth projection projecting radially inward and engaging with the second projection from below is formed.

[0021] A sixteenth aspect of the present disclosure is a method for manufacturing a spout assembly, comprising the steps of: preparing a spout having a cylindrical portion with male threads formed on its outer surface and a flange portion located below the cylindrical portion; preparing 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 engage with the male threads of the spout, and a band portion connected to the cap cylinder portion via a thin-walled portion; and attaching the cap to the spout, wherein in the step of attaching the cap to the spout, the female threads are screwed onto the male threads by a stopper, a first projection projecting upward is formed on the upper surface of the flange portion, a second projection is formed on the outer surface of the cylindrical portion located above the first projection and projecting radially outward, and a third projection is formed on the band portion that engages with the first projection in the circumferential direction, and a fourth projection is formed that projects radially inward and engages with the second projection from below. [Effects of the Invention]

[0022] According to this disclosure, the contents will be prevented from being tampered with, and the container with a spout will be easy to open. [Brief explanation of the drawing]

[0023] [Figure 1] FIG. 1 is a perspective view showing a container with a pouring spout according to an embodiment. [Figure 2] FIG. 2 is a side view showing a container with a pouring spout according to an embodiment. [Figure 3] FIG. 3 is a cross-sectional view (a cross-section taken along line III-III in FIG. 2) showing a container with a pouring spout according to an embodiment. [Figure 4] FIG. 4 is a perspective view showing a pouring spout assembly according to an embodiment. [Figure 5] FIG. 5 is a perspective view showing the pouring spout of a pouring spout assembly according to an embodiment. [Figure 6] FIG. 6 is a cross-sectional view (an enlarged view of part VI in FIG. 3) showing a pouring spout assembly according to an embodiment. [Figure 7] FIG. 7 is a cross-sectional view (a cross-section taken along line VII-VII in FIG. 3) showing a pouring spout assembly according to an embodiment. [Figure 8] FIG. 8 is a perspective view showing the cap of a pouring spout assembly according to an embodiment. [Figure 9] FIG. 9 is a cross-sectional view (a cross-section taken along line IX-IX in FIG. 3) showing a pouring spout assembly according to an embodiment. [Figure 10A] FIGS. 10A(a)-(b) are cross-sectional views for explaining the operation of a container with a pouring spout according to an embodiment. [[ID=​​​​​​​​​​​​​Figure 12 is a perspective view showing the spout of a first modified example of the spout assembly according to one embodiment. [Figure 13] Figure 13 is a cross-sectional view (corresponding to Figure 6) showing the spout of a first modified example of the spout assembly according to one embodiment. [Figure 14] Figure 14 is a perspective view showing the cap of a first modified example of the spout assembly according to one embodiment. [Figure 15] Figure 15 is a front view showing a second modified example of the spout assembly according to one embodiment. [Figure 16] Figure 16 is a front view illustrating the operation of a second modified example of the spout assembly according to one embodiment. [Figure 17] Figure 17 is a front view showing another example of a second modified example of the spout assembly according to one embodiment. [Figure 18] Figure 18 is a front view showing a third modified example of the spout assembly according to one embodiment. [Figure 19] Figure 19 is an enlarged front view showing the first and second claw portions of a third modified example of the spout assembly according to one embodiment. [Figure 20] Figures 20(a)-(c) are front views illustrating the operation of a third modified example of the spout assembly according to one embodiment. [Figure 21] Figure 21 is an enlarged front view showing the first and second claw portions of a fourth modified example of the spout assembly according to one embodiment. [Figure 22] Figures 22(a)-(c) are front views illustrating the operation of a fourth modified example of the spout assembly according to one embodiment. [Figure 23] Figure 23 is an enlarged front view showing the first and second claw portions of another example of a fourth modified example of the spout assembly according to one embodiment. [Figure 24] Figures 24(a)-(c) are front views illustrating the operation of another example of a fourth modified example of the spout assembly according to one embodiment. [Figure 25] Figures 25(a)-(b) are cross-sectional views illustrating the operation of a fifth modified example of the spout assembly according to one embodiment. [Figure 26] Figure 26 is a perspective view showing the spout of a sixth modified example of the spout assembly according to one embodiment. [Figure 27] Figure 27 is a cross-sectional view (corresponding to Figure 3) showing a sixth 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 27) showing a sixth modified example of the spout assembly according to one embodiment. [Figure 29] Figure 29 is a cross-sectional view (cross-sectional view along line XXIX-XXIX in Figure 27) showing a sixth modified example of the spout assembly according to one embodiment. [Figure 30] Figure 30 is a perspective view showing a cap of a sixth modified example of the spout assembly according to one embodiment. [Figure 31] Figure 31 is a front view showing a sixth modified example of the spout assembly according to one embodiment. [Figure 32] Figure 32 is a front view showing the cap of a sixth modified example of the spout assembly according to one embodiment. [Figure 33] Figure 33 is a side view showing the cap of a sixth modified example of the spout assembly according to one embodiment. [Figure 34] Figure 34 is a front view showing another example of a sixth modified example of the spout assembly according to one embodiment. [Modes for carrying out the invention]

[0024] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. Figures 1 to 11 are diagrams showing 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.

[0025] 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.

[0026] 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.

[0027] 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 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 less than or equal to a predetermined height. In other words, it may be required that the distance L from the inclined plate 15 on the top portion 14 of the container body 10 to the top portion 51 of the cap 50 be less than or equal to a predetermined length.

[0028] spout assembly Next, the spout assembly 20 will be described.

[0029] 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.

[0030] (pour spout) As shown in Figures 3 to 5, the spout 30 has a cylindrical portion 31 with male threads 31a (see Figures 3 and 4) formed on its outer surface, and a flange portion 32 located below the cylindrical portion 31.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Here, as shown in Figures 5 and 6, a first projection 36 and a second projection 37 located above the first projection 36 are formed on the outer surface of the cylindrical portion 31. The first projection 36 and the second projection 37 each protrude radially outward. Of these, the first projection 36 is formed on the second cylindrical portion 34. In the illustrated example, the first projection 36 is connected to the flange portion 32 and is formed integrally with the flange portion 32. The first projection 36 is the part that, when the container 1 with a spout is initially opened, comes into contact with the band portion 60, as described later, by the third projection 66 of the band portion 60, thereby suppressing the rotation of the band portion 60. In this embodiment, as shown in Figure 7, four first projections 36 are provided. Note that the first projections 36 do not necessarily have to be connected to the flange portion 32, and a gap may be formed between the first projections 36 and the flange portion 32 in the vertical direction. Furthermore, the number of the first protrusions 36 is arbitrary; it may be one to three, or five or more.

[0035] Furthermore, as shown in Figure 7, the first projection 36 includes a first surface 36a, a second surface 36b, and a third surface 36c. The first surface 36a extends radially from the outer surface of the cylindrical portion 31. The second surface 36b is located on the side of the cap 50 that is opening (counterclockwise in a plan view) than the first surface 36a, and extends circumferentially from the first surface 36a. The third surface 36c is located on the side of the cap 50 that is opening (counterclockwise in a plan view) than the second surface 36b, and extends from the second surface 36b to the outer surface of the cylindrical portion 31. Thus, because the first protrusion 36 includes a first surface 36a, a second surface 36b, and a third surface 36c, when the cap 50 is rotated in the opening direction (counterclockwise in a plan view), the fourth surface 66a of the cap 50, as described later, is more likely to interfere with the first protrusion 36 (first surface 36a). 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. In addition, because the first protrusion 36 includes a third surface 36c, when the cap 50 is attached to the spout 30, the third protrusion 66 of the band portion 60, as described later, is more likely to overcome the first protrusion 36.

[0036] As shown in Figures 5 and 6, the second projection 37 is formed on the first cylindrical portion 33. The second projection 37 engages with the fourth projection 67 of the band portion 60 (described later) to position the band portion 60 in the vertical direction. The second projection 37 also engages with the fourth projection 67 of the band portion 60 (described later) to prevent the band portion 60 from being removed from the spout 30. This second projection 37 protrudes 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.

[0037] Furthermore, in a vertical cross-section, the upper surface of the second protrusion 37 slopes downward as it extends radially outward. This makes it easier for the fourth protrusion 67 of the band portion 60, described later, to overcome the second protrusion 37 when attaching the cap 50 to the spout 30. The shape of the second protrusion 37 can be any shape, as long as it allows the fourth protrusion 67 to overcome the second protrusion 37 when attaching the cap 50 to the spout 30, positions the band portion 60 in the vertical direction, 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 second protrusion 37 may be curved so as to be convex radially outward.

[0038] 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.

[0039] (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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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, 8) 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.

[0044] 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, as described above, the distance L (see Figure 2) from the inclined plate 15 on the top 14 of the container body 10 to the top 51 of the cap 50 may be required to be less than or equal to a predetermined length. For example, if the container body 10 is attached below the band portion 60, in order to keep the distance L below a predetermined length, the sum of the height of the cap cylinder portion 52 and the height of the band portion 60 may be required to be less than or equal to a predetermined height. In contrast, if the band portion 60 is inserted into the opening 11 of the container body 10, in order to keep the distance L below a predetermined length, the sum of the height of the cap cylinder portion 52 and the height of the part of the band portion 60 that is exposed outward from the inclined plate 15 may be required to be less than or equal to a predetermined height. Therefore, 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 the band portion 60, a decrease in the ease of opening the cap 50 can be suppressed.

[0045] Furthermore, as shown in Figures 6 and 8, the band portion 60 has a third projection 66 and a fourth projection 67. The third projection 66 is the part that breaks the thin-walled portion 61 by engaging with the first projection 36 of the spout 30 in the circumferential direction. In other words, the third projection 66 is the part that abuts against the first projection 36 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 66 on the inner surface of the band portion 60, the thin-walled portion 61 can be reliably broken. In this embodiment, as shown in Figure 7, four third projections 66 are provided. The number of third projections 66 is arbitrary and may be one to three or five or more.

[0046] The third projection 66 and the fourth projection 67 are each formed on the inner surface of the band portion 60. Furthermore, the third projection 66 and the fourth projection 67 each project radially inward. In the illustrated example, the third projection 66 extends from the lower surface of the fourth projection 67 on the band portion 60 to the lower surface of the band portion 60. The third projection 66 may also be formed only in a portion of the vertical region from the lower surface of the fourth projection 67 to the lower surface of the band portion 60.

[0047] Furthermore, as shown in Figure 7, the third projection 66 includes a fourth surface 66a, a fifth surface 66b, and a sixth surface 66c. The fourth surface 66a extends radially from the inner surface of the band portion 60. The fifth surface 66b is located on the side of the cap 50 closer to the closing direction (clockwise in a plan view) than the fourth surface 66a, and extends circumferentially from the fourth surface 66a. The sixth surface 66c is located on the side of the cap 50 closer to the closing direction (clockwise in a plan view) than the fifth surface 66b, and extends from the fifth surface 66b to the inner surface of the band portion 60. Thus, because the third protrusion 66 includes a fourth surface 66a, a fifth surface 66b, and a sixth surface 66c, when the cap 50 is rotated in the opening direction (counterclockwise in a plan view), the band portion 60 (fourth surface 66a) is more likely to interfere with the first surface 36a of the first protrusion 36.

[0048] As shown in Figure 6, the fourth projection 67 is configured to engage with the second projection 37 of the spout 30 from below. The fourth projection 67 engages with the second projection 37 of the spout 30 and plays a role in positioning the band portion 60 in the vertical direction. Furthermore, after the container 1 with the spout is initially opened, the fourth projection 67 engages with the second projection 37 of the spout 30 and plays a role in preventing the band portion 60 from being removed from the spout 30. This fourth 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.

[0049] In the illustrated example, in the vertical cross-section, the upper surface of the fourth protrusion 67 slopes downward as it moves radially inward. This makes it easier to remove the cap 50 from the mold when removing it from the mold of an injection molding machine (not shown). On the other hand, the lower surface of the fourth protrusion 67 extends horizontally in the vertical cross-section. The shape of the fourth protrusion 67 can be any shape, as long as it allows the cap 50 to be removed from the mold, allows the fourth protrusion 67 to overcome the second protrusion 37 when attaching the cap 50 to the spout 30, positions the band portion 60 in the vertical direction, and prevents the band portion 60 from being removed from the spout 30 after the container 1 with the spout has been initially opened.

[0050] Furthermore, as shown in Figures 4, 6, and 8, a base portion (first base portion) 62 is arranged on the upper surface of the band portion 60. Multiple base portions 62 are arranged at intervals in the circumferential direction (for example, 12). Each base portion 62 protrudes toward the cap cylinder portion 52.

[0051] Furthermore, a base portion (second base portion) 55 is positioned 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. The number of base portions 55 positioned on the lower surface of the cap cylinder portion 52 may be the same as the number of base portions 62 positioned on the upper surface of the band portion 60.

[0052] 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.

[0053] Furthermore, as shown in Figure 9, 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 in a plan view. That is, in a plan view, there are no other base portions 55 that are point-symmetrical with respect to the base portion 55a with respect to the central axis CL. Note that in Figure 9, the figure F that is point-symmetrical with respect to the base portion 55a with respect to the central axis CL is shown by a dashed line (two-dot line).

[0054] Furthermore, as shown in Figures 3, 4, and 6 to 8, 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.

[0055] 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.

[0056] 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, 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.

[0057] 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.

[0058] Furthermore, in a plan view, the rib 65 has a rectangular shape. However, it is not limited to this, and the rib 65 may have a shape such as a triangle in a plan view.

[0059] 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.

[0060] Referring again to Figures 3, 4 and 6 to 8, a fifth projection 63 is formed above the rib 65, projecting radially outward. The fifth projection 63 protrudes radially outward from the rib 65. This fifth 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, the spout assembly 20 can be prevented from being removed from the container body 10 by sandwiching the portion around the opening 11 of the container body 10 between the fifth projection 63 and the flange portion 32 of the spout 30 (see Figure 3). The amount L2 of the radial outward projection of the fifth 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.

[0061] This fifth protrusion 63 is formed in a position that overlaps with the rib 65 in the circumferential direction. This increases the rigidity of the fifth protrusion 63 and suppresses deformation of the fifth protrusion 63. Therefore, when attaching the spout assembly 20 to the container body 10, it is possible to prevent the fifth protrusion 63 from being crushed by the part of the container body 10 surrounding the opening 11.

[0062] The fifth 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 fifth projection 63 and the flange portion 32 of the spout 30. Therefore, because the fifth 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 fifth 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.

[0063] As shown in Figure 6, in the vertical cross-section, the upper surface of the fifth projection 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 fifth projection 63 of the cap 50 when the spout assembly 20 is attached to the container body 10.

[0064] 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.

[0065] 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 10A(a)-(b) to 11(a)-(c).

[0066] First, prepare the spout 30 and cap 50 of the spout assembly 20. The spout 30 may be manufactured by injection molding using, for example, an injection molding machine (not shown).

[0067] Furthermore, the cap 50 may be manufactured, for example, as follows.

[0068] First, as shown in Figure 10A(a), a mold 90 is prepared, which includes a cavity mold 91, a core 92, a pair of slides 93, and a cylindrical dispensing part 94. Of these, the cavity mold 91 has a gate (injection port) 91a formed therein for injecting the injection resin.

[0069] Next, the core 92 is placed inside the cavity mold 91, and a pair of slides 93 and a cylindrical ejector part 94 are attached. In this way, as shown in Figure 10A(b), the cavity mold 91, the core 92, the pair of slides 93, and the cylindrical ejector part 94 are clamped together.

[0070] Next, as shown in Figure 10B(a), injection resin is injected into the mold 90. At this time, the injection resin is injected from the gate 91a into the space formed by the cavity mold 91 and the core 92. For example, polypropylene, polyethylene, etc. can be used as the injection resin.

[0071] The injected resin enters the cavity mold 91 and the pair of slides 93 and the core 92, and this injected resin forms the cap cylinder portion 52 and the band portion 60 of the cap 50.

[0072] Next, as shown in Figure 10B(b), the cavity mold 91 of the mold 90 is removed from the manufactured cap 50. At this time, the pair of slides 93 are slid in a direction that separates them from each other.

[0073] Next, as shown in Figure 10C(a), the core 92 is removed from the cap 50.

[0074] Next, as shown in Figure 10C(b), the cap 50 is removed by pressing the cylindrical dispensing part 94 against the cap 50. At this time, the band portion 60 is pressed by the cylindrical dispensing part 94, and the thin-walled portion 61 is deformed. In this embodiment, a base portion (first base portion) 62 is placed on the upper surface of the band portion 60, and a base portion (second base portion) 55 is placed on the lower surface of the cap cylinder portion 52. The base portion 62 of the band portion 60 and the base portion 55 of the cap cylinder portion 52 overlap each other in the circumferential direction. As a result, when the band portion 60 is pressed by the cylindrical dispensing part 94, the base portion 62 of the band portion 60 and the base portion 55 of the cap cylinder portion 52 come into contact with each other. Therefore, excessive deformation of the thin-walled portion 61 can be suppressed, and unintended breakage of the thin-walled portion 61 can be suppressed. In this way, the cap 50 is obtained. Furthermore, when the cap 50 is removed from the mold 90, the base portion 62 of the band portion 60 and the base portion 55 of the cap cylinder portion 52 may be in contact with each other, or they may be spaced apart from each other.

[0075] Next, the fabricated cap 50 is attached to the spout 30. At this time, as shown in Figure 10D(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 10D(b), the cap 50 is attached to the spout 30, and the spout assembly 20 is obtained.

[0076] In parallel with the fabrication of the spout assembly 20, the container body 10, which is provided with the opening 11, is prepared.

[0077] Next, the spout assembly 20 is attached to the container body 10. In this case, first, as shown in Figure 11(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.

[0078] At this time, as shown in Figure 11(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 fifth projection 63 of the cap 50 and the flange portion 32 of the spout 30. 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.

[0079] 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.

[0080] 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.

[0081] 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, a first projection 36 is formed on the outer surface of the cylindrical portion 31, projecting radially outward. In addition, a third projection 66 is formed on the inner surface of the band portion 60, projecting radially inward and engaging with the first projection 36 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 is restricted at a predetermined position. As a result, as shown in Figure 11(c), by rotating the cap 50 in the opening direction, 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.

[0082] 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 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.

[0083] Furthermore, a first projection 36 is formed on the outer surface of the cylindrical portion 31, projecting radially outward. In addition, a third projection 66 is formed on the band portion 60, projecting radially inward and engaging with the first projection 36 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, even if the band portion 60 is inserted into the opening 11 of the container body 10, 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. As a result, 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.

[0084] Furthermore, according to this embodiment, a second projection 37 is formed on the outer surface of the cylindrical portion 31, projecting radially outward. In addition, a fourth projection 67 is formed on the band portion 60, projecting radially inward and engaging with the second projection 37 from below. This allows for the vertical positioning of the band portion 60. That is, the upward movement of the band portion 60 is restricted by the second projection 37. This ensures that the first projection 36 and the third projection 66 overlap each other reliably in the vertical direction. Therefore, when the cap 50 is rotated in the opening direction (counterclockwise in a plan view), the third projection 66 of the band portion 60 can reliably interfere with the first projection 36 of the spout 30. Moreover, the formation of the second projection 37 on the cylindrical portion 31 and the fourth projection 67 on the band portion 60 prevents the band portion 60 from being removed from the spout 30 after the container 1 with the spout has been initially opened.

[0085] Furthermore, according to this embodiment, a base portion 62 is positioned on the upper surface of the band portion 60, and a base portion 55 is positioned on the lower surface of the cap cylinder portion 52. The base portions 62 and 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 portions 62 and 55 will be shifted in the circumferential direction. Therefore, according to this modified example, by checking the positional relationship between the base portion 62 and 55, it is easy to determine whether or not the cap 50 has been opened improperly.

[0086] Furthermore, in this embodiment, 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 easier to determine, for example, whether the cap 50 has been improperly opened when the male screw 31a and female screw 52a are multi-start screws such as double-start screws. 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 55a can be increased. Therefore, in this modified example, 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 55a.

[0087] [Differentiation] Next, a modified example of the spout assembly 20 will be described.

[0088] (First variation) Furthermore, although the above-described embodiment describes an example in which the first projection 36 is formed on the outer surface of the cylindrical portion 31, the embodiment is not limited to this. For example, as shown in Figures 12 and 13, the first projection 36 may be formed on the upper surface of the flange portion 32. In this case, the first projection 36 protrudes upward. In the illustrated example, the first projection 36 is connected to the second cylindrical portion 34 and is formed integrally with the second cylindrical portion 34. Note that the first projection 36 does not have to be connected to the second cylindrical portion 34, and a gap may be formed radially between the first projection 36 and the second cylindrical portion 34.

[0089] When the first projection 36 is formed on the upper surface of the flange portion 32, as shown in Figure 12, the first surface 36a of the first projection 36 may extend along the vertical direction when viewed from the radial direction. The second surface 36b is provided on the side of the cap 50 that is opening (counterclockwise in a plan view) than the first surface 36a, and may extend radially from the first surface 36a. The third surface 36c is provided on the side of the cap 50 that is opening (counterclockwise in a plan view) than the second surface 36b, and may extend from the second surface 36b to the upper surface of the flange portion 32.

[0090] Furthermore, 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 66 also protrudes downward from the lower surface of the thickened portion 69a.

[0091] In this modified example, the fourth surface 66a of the third projection 66 extends vertically when viewed radially. The fifth surface 66b is located on the side of the cap 50 that is closing (clockwise in a plan view) than the fourth surface 66a, and may extend circumferentially from the fourth surface 66a. The sixth surface 66c is located on the side of the cap 50 that is closing (clockwise in a plan view) than the fifth surface 66b, and may extend from the fifth surface 66b to the lower surface of the thickened portion 69a.

[0092] Thus, even when the first protrusion 36 is formed on the upper surface of the flange portion 32, the thin-walled portion 61 can be reliably broken when the container 1 with a spout is initially opened.

[0093] (Second variation) Furthermore, in the embodiment described above, 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 15, a first claw portion 62a that protrudes upward may be formed on the upper surface of the band portion 60.

[0094] 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, when attaching the cap 50 to the spout 30, the third protrusion 66 may come into contact with the first protrusion 36. In this case, the rotation of the band portion 60 relative to the spout 30 is restricted, which may cause only the cap cylinder portion 52 to rotate relative to the spout 30. When only the cap cylinder portion 52 rotates relative to the spout 30 in this way, the cap cylinder portion 52 will rotate relative to the band portion 60, which may cause the thin-walled portion 61 to unintentionally break.

[0095] In contrast, in this modified example, 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 66 comes into contact with the first protrusion 36 when the cap 50 is attached to the spout 30, the band portion 60 will rotate 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 66 to overcome the first protrusion 36. This configuration prevents the thin-walled portion 61 from unintentionally breaking.

[0096] 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.

[0097] 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.

[0098] 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 16, 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 15) 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 16). Therefore, as shown in Figure 16, 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] In this modified version, 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 66 comes into contact with the first protrusion 36 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 66 can overcome the first protrusion 36. As a result, unintentional breakage of the thin-walled portion 61 can be suppressed.

[0103] 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 example, it is even easier to determine whether or not the cap 50 has been improperly opened by checking the positional relationship between the base portion 62 and the base portion 55.

[0104] 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 17, 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.

[0105] 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.

[0106] 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.

[0107] (Third variation) Furthermore, as shown in Figures 18 and 19, a first claw portion 62a protruding upward is formed on the upper surface of the band portion 60, and a projection 81 that protrudes upward and is deformable in the opening direction of the cap 50 may be formed on the first claw portion 62a.

[0108] 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.

[0109] The portion of the first claw portion 62a other than the projection 81 does not overlap with the base portion 55 in the vertical direction. Therefore, the portion of the first claw portion 62a other than the projection 81 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 portion of the first claw portion 62a other than the projection 81, 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 portion of the first claw portion 62a other than the projection 81 is equal to the height (vertical distance) of the base portion 62. However, the height of the portion of the first claw portion 62a other than the projection 81 may be lower than the height of the base portion 62.

[0110] The projection 81 plays a role in increasing the circumferential displacement between the cap cylinder portion 52 and the band portion 60 after the initial opening of the container 1 with a spout. In this case, the projection 81 may also increase the circumferential displacement between the base portion 55 and the base portion 62 after the initial opening of the container 1 with a spout.

[0111] The projection 81 described above is provided on one of the two first claw portions 62a (the rightmost first claw portion 62a in Figures 18 and 19). Furthermore, the projection 81 protrudes upward from the end of the first claw portion 62a in the circumferential direction, specifically from the end located in front of the cap 50 in the opening direction (the rightmost end in Figures 18 and 19). As a result, the projection 81 is easily deformed in the opening direction of the cap 50, but difficult to deform in the closing direction of the cap 50. The projection 81 may or may not be in contact with the cap cylinder portion 52.

[0112] Furthermore, the second claw portion 55b plays a role in increasing the circumferential displacement between the cap cylinder portion 52 and the band portion 60 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 contacts the projection 81 formed on the first claw portion 62a. As described above, the projection 81 is less likely to deform in the closing direction of the cap 50. Therefore, the band portion 60 rotates relative to the spout 30 in accordance with the rotation of the cap cylinder portion 52. That is, the band portion 60 rotates together with the cap cylinder portion 52 relative to the spout 30. Thus, when the second claw portion 55b contacts the projection 81, causing the band portion 60 to rotate with the cap cylinder portion 52 relative to the spout 30, the circumferential position of the cap cylinder portion 52 relative to the band portion 60 after the initial opening of the container with spout 1 (see Figure 20(c) described later) will be significantly different from the circumferential position of the cap cylinder portion 52 relative to the band portion 60 before the initial opening of the container with spout 1 (see Figures 18 and 19). As a result, the circumferential displacement between the cap cylinder portion 52 and the band portion 60 becomes large after the initial opening of the container with spout 1.

[0113] In the illustrated example, two second claw portions 55b are formed on the lower surface of the cap cylinder portion 52. The number of second claw portions 55b is arbitrary; there may be one or three or more.

[0114] The second claw portion 55b may overlap the base portion 62 in the vertical direction. 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.

[0115] Furthermore, the second claw portion 55b may overlap the portion of the first claw portion 62a other than the projection 81 in the vertical direction. Of the two second claw portions 55b, one of them 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.

[0116] Next, the operation of this modified example will be explained. First, the container 1 with a spout is initially opened. At this time, as shown in Figure 20(a), the cap 50 is rotated in the opening direction. As a result, the second claw portion 55b formed on the cap cylinder portion 52 rides up onto the first claw portion 62a formed on the band portion 60.

[0117] Next, as shown in Figure 20(b), when the cap 50 is rotated further in the opening direction, the second claw portion 55b comes into contact with the projection 81 formed on the first claw portion 62a, causing the projection 81 to deform in the opening direction of the cap 50. As a result, the second claw portion 55b moves over the projection 81.

[0118] Then, by further rotating the cap 50 in the opening direction, the container 1 with the spout is initially opened.

[0119] Subsequently, when closing the container 1 with a spout, the cap cylinder portion 52 is attached to the spout 30. At this time, the cap cylinder portion 52 is rotated in the closing direction of the cap 50. Here, the projection 81 is less likely to deform in the closing direction. As a result, as shown in Figure 20(c), the second claw portion 55b formed on the cap cylinder portion 52 engages with the projection 81 and the first claw portion 62a without overriding the projection 81.

[0120] In this modified example, a first claw portion 62a protruding upward is formed on the upper surface of the band portion 60. A second claw portion 55b protruding downward is formed on the lower surface of the cap cylinder portion 52. A projection 81 is formed on the first claw portion 62a, which protrudes upward and is deformable in the direction of opening the cap 50. As a result, when the container with a spout 1 is initially opened, the second claw portion 55b can overcome the projection 81, and when the container with a spout 1 is closed, the second claw portion 55b engages with the projection 81. Therefore, when the cap cylinder portion 52 is attached to the spout 30 after the container with a spout 1 has been initially opened, the band portion 60 rotates relative to the spout 30 so as to follow the rotation of the cap cylinder portion 52. In this way, when the second claw portion 55b contacts the projection 81, the circumferential position of the cap cylinder portion 52 relative to the band portion 60 after the initial opening of the container 1 with a spout becomes significantly different from the circumferential position of the cap cylinder portion 52 relative to the band portion 60 before the initial opening of the container 1 with a spout. Therefore, it becomes even easier to determine whether or not the cap 50 has been opened improperly.

[0121] (Fourth variation) Furthermore, as shown in Figure 21, a first claw portion 62a that protrudes upward and a recess 82 may be formed on the upper surface of the band portion 60.

[0122] In the illustrated example, one first claw portion 62a is formed on the upper surface of the band portion 60. The number of first claw portions 62a is arbitrary and may be two or more. In the illustrated example, the first claw portion 62a is in contact with the cap cylinder portion 52.

[0123] At least a portion of the first claw portion 62a overlaps the recess 82 in the circumferential direction. The first claw portion 62a is also configured to be deformable. When the cap 50 is rotated in the opening direction, the second claw portion 55b comes into contact with the first claw portion 62a, so that at least a portion of the first claw portion 62a is housed within the recess 82.

[0124] Furthermore, in this modified example, the second claw portion 55b also plays a role in increasing the circumferential displacement between the cap cylinder portion 52 and the band portion 60 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 comes into contact with the first claw portion 62a. As a result, the circumferential position of the cap cylinder portion 52 relative to the band portion 60 after the initial opening of the container 1 with a spout (see Figure 22(c) described later) is significantly different from the circumferential position of the cap cylinder portion 52 relative to the band portion 60 before the initial opening of the container 1 with a spout (see Figure 21). Therefore, the circumferential displacement between the cap cylinder portion 52 and the band portion 60 is increased after the initial opening of the container 1 with a spout.

[0125] In the illustrated example, two second claw portions 55b are formed on the lower surface of the cap cylinder portion 52. The number of second claw portions 55b is arbitrary; there may be one or three or more. In the illustrated example, the second claw portions 55b may be in contact with the band portion 60.

[0126] Next, the operation of this modified example will be explained. First, the container 1 with a spout is initially opened. At this time, as shown in Figure 22(a), the cap 50 is rotated in the opening direction. As a result, the second claw portion 55b formed on the cap cylinder portion 52 comes into contact with the first claw portion 62a formed on the band portion 60. As a result, the first claw portion 62a deforms, and the second claw portion 55b rides up onto the first claw portion 62a. Then, as the first claw portion 62a deforms further, at least a part of the first claw portion 62a is accommodated in the recess 82. In this way, as shown in Figure 22(b), the second claw portion 55b overcomes the projection 81.

[0127] Then, by further rotating the cap 50 in the opening direction, the container 1 with the spout is initially opened.

[0128] Subsequently, when closing the container 1 with a spout, the cap cylinder portion 52 is attached to the spout 30. At this time, the cap cylinder portion 52 is rotated in the closing direction of the cap 50. At this time, the second claw portion 55b formed on the cap cylinder portion 52 comes into contact with the first claw portion 62a housed in the recess 82. As a result, the first claw portion 62a is pulled out by the second claw portion 55b, and as shown in Figure 22(c), the second claw portion 55b engages with the first claw portion 62a.

[0129] In this modified example, a first claw portion 62a protruding upward and a recess 82 are formed on the upper surface of the band portion 60. A second claw portion 55b protruding downward is formed on the lower surface of the cap cylinder portion 52. Furthermore, at least a portion of the first claw portion 62a overlaps the recess 82 in the circumferential direction. When the cap 50 is rotated in the opening direction, the second claw portion 55b contacts the first claw portion 62a, causing at least a portion of the first claw portion 62a to be housed in the recess 82. As a result, when the container 1 with a spout is initially opened, the second claw portion 55b can overcome the first claw portion 62a, and when the container 1 with a spout is closed, the second claw portion 55b engages with the first claw portion 62a. Therefore, even in this modified example, it is possible to more easily determine whether the cap 50 has been improperly opened.

[0130] In the fourth modified example described above, when the cap 50 is rotated in the opening direction, the second claw portion 55b comes into contact with the first claw portion 62a, and at least a part of the first claw portion 62a is housed in the recess 82. In this case, as shown in Figure 23, a retaining portion 83 for holding the first claw portion 62a may be formed in the recess 82.

[0131] The retaining portion 83 is configured to house at least a portion of the first claw portion 62a within the recess 82 by contacting the upper surface 62b of the first claw portion 62a. In this case, the upper surface 62b of the first claw portion 62a may be inclined downward along the opening direction of the cap 50. This makes it easier for the first claw portion 62a to overcome the retaining portion 83, as will be described later. As a result, the retaining portion 83 is more likely to contact the upper surface 62b of the first claw portion 62a.

[0132] When opening the container 1 with a spout for the first time, first, as shown in Figure 24(a), the cap 50 is rotated in the opening direction. As a result, the second claw portion 55b formed on the cap cylinder portion 52 comes into contact with the first claw portion 62a formed on the band portion 60. This causes the first claw portion 62a to deform, and the second claw portion 55b rides up onto the first claw portion 62a. Furthermore, as the first claw portion 62a deforms further, it moves over the retaining portion 83 formed in the recess 82. The retaining portion 83 then comes into contact with the upper surface 62b of the first claw portion 62a and holds the first claw portion 62a. In this way, at least a part of the first claw portion 62a is housed in the recess 82. Then, as shown in Figure 24(b), the second claw portion 55b moves over the first claw portion 62a.

[0133] Then, by further rotating the cap 50 in the opening direction, the container 1 with the spout is initially opened.

[0134] Subsequently, when closing the container 1 with a spout, the cap cylinder portion 52 is attached to the spout 30. At this time, the cap cylinder portion 52 is rotated in the closing direction of the cap 50. At this time, the second claw portion 55b formed on the cap cylinder portion 52 comes into contact with the first claw portion 62a housed in the recess 82. As a result, the second claw portion 55b engages with the first claw portion 62a, as shown in Figure 24(c).

[0135] In this modified version, a retaining portion 83 for holding the first claw portion 62a is formed in the recess 82. This allows at least a portion of the first claw portion 62a to remain housed within the recess 82. Therefore, by checking the shape of the first claw portion 62a, it becomes even easier to determine whether the cap 50 has been opened improperly.

[0136] (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, 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.

[0137] In this modified example, when manufacturing the spout assembly 20, as shown in Figure 25(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 25(b), the cap 50 is attached to the spout 30, and the spout assembly 20 is obtained.

[0138] 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 66 of the cap 50 from interfering with the first protrusion 36 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 66 relative to the first protrusion 36 is at a desired position. Therefore, it is possible to prevent variations in the opening angle of the spout assembly 20.

[0139] (Sixth 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, as shown in Figure 26, a first stopper 41 and a third stopper 40 may be provided to restrict the rotation of the cap 50 in the closing direction. Also, as shown in Figure 27, a second stopper 70 that engages with the first stopper 41 may be provided on the band portion 60, and a fourth stopper 56 that engages with the third stopper 40 may be provided on the cap cylinder portion 52. Here, we will first describe the third stopper 40 of the spout 30.

[0140] As shown in Figures 26 to 28, in the spout 30 of this modified example, a third 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 third 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 third stopper 40 to the male screw 31a in this way, the rigidity of the third stopper 40 can be increased. This third stopper 40 protrudes radially outward from the outer surface of the first cylindrical portion 33. The third stopper 40 is the part that, when closing the container 1 with a spout, contacts the fourth stopper 56 of the cap 50 to suppress the rotation of the cap 50. In the illustrated example, two third stoppers 40 are provided (see Figures 27 and 28). Note that the third stopper 40 does not necessarily have to be connected to the male screw 31a. Furthermore, the number of third stoppers 40 is arbitrary; for example, there may be one, or there may be three or more. Also, the number of third 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.

[0141] Furthermore, as shown in Figure 28, the third stopper 40 includes a locking surface 40a. In a plan view, the locking surface 40a extends radially. In this way, because the third stopper 40 includes a locking surface 40a, when the cap 50 is rotated in the closing direction (clockwise in a plan view), the fourth stopper 56 of the cap 50 is more likely to interfere with the locking surface 40a of the third 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.

[0142] As shown in Figures 26, 27, and 29, in the spout 30 of this modified example, a first 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 first stopper 41 is formed on the second cylindrical portion 34. This first stopper 41 protrudes radially outward from the outer surface of the second cylindrical portion 34. In this case, the first stopper 41 may be composed of the first protruding portion 36 described above. The first stopper 41 is the part that, when closing the container 1 with the spout, contacts the second stopper 70 of the band portion 60 to suppress the rotation of the cap 50. In the illustrated example, four first stoppers 41 are provided (see Figure 29). The number of first stoppers 41 is arbitrary; for example, there may be one to three, or five or more.

[0143] Furthermore, as shown in Figure 29, the third surface 36c of the first projection 36 constituting the first stopper 41 extends radially in a plan view. This makes it easier for the second stopper 70 of the band portion 60 to interfere with the third surface 36c of the first projection 36 (first stopper 41) when the cap 50 is rotated in the closing direction (clockwise in a plan view). This restricts the movement of the band portion 60 in the closing direction when the cap 50 is rotated in the closing direction.

[0144] Next, the modified cap 50 will be described. As shown in Figures 27 and 28, in the modified cap 50, a fourth stopper 56 that engages with the third stopper 40 is provided on the cap cylinder portion 52. In the illustrated example, the fourth stopper 56 is made up of the female screw 52a described above. This fourth stopper 56 is a part that suppresses the rotation of the cap 50 by contacting the third stopper 40 in the circumferential direction. That is, when closing the container 1 with a spout, the fourth stopper 56 is a part that suppresses the rotation of the cap 50 by contacting the third stopper 40 of the spout 30. 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 fourth stoppers 56 are provided. The number of fourth stoppers 56 is arbitrary; for example, there may be one, or there may be three or more.

[0145] Furthermore, as shown in Figure 28, the fourth stopper 56 includes a locking surface 56a. In a plan view, the locking surface 56a extends radially. Thus, because the fourth stopper 56 includes a locking surface 56a, when the cap 50 is rotated in the closing direction (clockwise in a plan view), the fourth stopper 56 of the cap 50 is more likely to interfere with the locking surface 40a of the third stopper 40.

[0146] Furthermore, as shown in Figures 27, 29, and 30, in the cap 50 according to this modified example, a second stopper 70 that engages with the first stopper 41 is provided on the band portion 60. The second stopper 70 protrudes radially inward. The second stopper 70 is the part that suppresses the rotation of the band portion 60 by contacting the first stopper 41 of the spout 30 when closing the container 1 with a spout. In the illustrated example, four second stoppers 70 are provided (see Figure 29). The number of second stoppers 70 is arbitrary; for example, there may be one to three, or five or more.

[0147] Furthermore, as shown in Figure 29, the second stopper 70 includes a locking surface 70a. In a plan view, the locking surface 70a extends radially. Thus, because the second stopper 70 includes a locking surface 70a, when the cap 50 is rotated in the closing direction (clockwise in a plan view), the second stopper 70 of the band portion 60 is more likely to interfere with the third surface 36c of the first projection 36 (first stopper 41).

[0148] Here, as shown in Figure 31, 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 second stopper 70 of the band portion 60 comes into contact with the first stopper 41 of the spout 30 before the fourth stopper 56 of the cap cylinder portion 52 comes into contact with the third 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 second stopper 70 of the band portion 60 contacts the first stopper 41 of the spout 30 before the fourth stopper 56 of the cap cylinder portion 52 contacts the third 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.

[0149] As shown in Figure 32, 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 33, 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.

[0150] In this modified example, the cylindrical portion 31 is provided with a first stopper 41 that restricts the rotation of the cap 50 in the closing direction, and the band portion 60 is provided with a second stopper 70 that engages with the first 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 second stopper 70 of the band portion 60 contacts the first stopper 41 of the spout 30 before the fourth stopper 56 of the cap cylindrical portion 52 contacts the third 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.

[0151] Although an example has been described in which the first stopper 41 is composed of the first projection 36, the invention is not limited to this. For example, as shown in Figure 34, the first stopper 41 may be composed of a recess 41a formed on the lower surface of the band portion 60. In this case, the second stopper 70 may protrude upward from the flange portion 32.

[0152] 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 41 and a third stopper 40 are provided on the cylindrical portion 31, a second stopper 70 is provided on the band portion 60, and a fourth stopper 56 is provided on the cap cylinder portion 52. However, it is not limited to this, and the third stopper 40 is not required on the cylindrical portion 31, nor is the fourth stopper 56 required on the cap cylinder portion 52. Even in this case, by providing the first stopper 41 on the cylindrical portion 31 and the second stopper 70 on the band portion 60, it is possible to prevent the cap 50 from being overtightened when the cap 50 is rotated in the closing direction. [Explanation of symbols]

[0153] 1. Container with spout 10 Container body 11 Aperture 20 Spout assembly 30 spout 31a Male screw 31 Cylindrical section 32 Flange section 36 1st protrusion 37 Second protrusion 41 First Stopper 50 caps 51 Heavenly Beings 52 Cap cylinder 52a Female thread 55 Base 55a Base 55b Second claw portion 60 Band Section 61 Thin-walled section 62 Base 62a First claw portion 66 Third protrusion 67 4th protrusion 70 Second Stopper 81 Protrusion 82 recess 83 Holding part

Claims

1. A spout having a cylindrical portion with male threads formed on its outer surface and a 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 first projection projecting radially outward and a second projection located above the first projection and projecting radially outward are formed on the outer surface of the cylindrical portion. The band portion is formed with a third projection that protrudes radially inward and engages with the first projection in the circumferential direction, and a fourth projection that protrudes radially inward and engages with the second projection from below. 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.

2. The spout assembly according to claim 1, 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.

3. The spout assembly according to claim 1, 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.

4. The spout assembly according to claim 1, 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.

5. A spout having a cylindrical portion with male threads formed on its outer surface and a 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 first projection projecting radially outward and a second projection located above the first projection and projecting radially outward are formed on the outer surface of the cylindrical portion. The band portion is formed with a third projection that protrudes radially inward and engages with the first projection in the circumferential direction, and a fourth projection that protrudes radially inward and engages with the second projection from below. A spout assembly having a first claw portion that protrudes upward on the upper surface of the band portion, a second claw portion that protrudes downward on the lower surface of the cap cylinder portion, and a projection that protrudes upward and is deformable in the direction of opening the cap formed on the first claw portion.

6. The spout assembly according to claim 1, wherein a first claw portion projecting upward is formed on the upper surface of the band portion, a second claw portion projecting downward is formed on the lower surface of the cap cylinder portion, and a projection projecting upward and deformable in the direction of opening the cap is formed on the first claw portion.

7. A spout having a cylindrical portion with male threads formed on its outer surface and a 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 first projection projecting radially outward and a second projection located above the first projection and projecting radially outward are formed on the outer surface of the cylindrical portion. The band portion is formed with a third projection that protrudes radially inward and engages with the first projection in the circumferential direction, and a fourth projection that protrudes radially inward and engages with the second projection from below. A spout assembly having a first claw portion projecting upward and a recess formed on the upper surface of the band portion, and a second claw portion projecting downward on the lower surface of the cap cylinder portion, wherein at least a portion of the first claw portion overlaps the recess in the circumferential direction, and when the cap is rotated in the opening direction, the second claw portion contacts the first claw portion, thereby housing at least a portion of the first claw portion within the recess.

8. The spout assembly according to claim 1, wherein a first claw portion projecting upward and a recess are formed on the upper surface of the band portion, a second claw portion projecting downward is formed on the lower surface of the cap cylinder portion, at least a portion of the first claw portion overlaps the recess in the circumferential direction, and when the cap is rotated in the opening direction, the second claw portion contacts the first claw portion, thereby housing at least a portion of the first claw portion in the recess.

9. The spout assembly according to claim 7, wherein a retaining portion for holding the first claw portion is formed in the recess.

10. 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, the band portion is provided with a second stopper that engages with the first stopper, a first claw portion that protrudes upward is formed on the upper surface of the band portion, and 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.

11. A container body with an opening, A container with a spout, comprising a spout assembly according to any one of claims 1 to 10, which is attached to the container body and closes the opening.

12. The container with a spout according to claim 11, wherein the band portion is inserted into the opening.

13. A step of preparing a spout having a cylindrical portion with male threads formed on its outer surface and a 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 first projection projecting radially outward and a second projection located above the first projection and projecting radially outward are formed on the outer surface of the cylindrical portion. The band portion is formed with a third projection that protrudes radially inward and engages with the first projection in the circumferential direction, and a fourth projection that protrudes radially inward and engages with the second projection from below. A method for manufacturing 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.

14. A step of preparing a spout having a cylindrical portion with male threads formed on its outer surface and a 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 first projection projecting radially outward and a second projection located above the first projection and projecting radially outward are formed on the outer surface of the cylindrical portion. The band portion is formed with a third projection that protrudes radially inward and engages with the first projection in the circumferential direction, and a fourth projection that protrudes radially inward and engages with the second projection from below. A method for manufacturing 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.

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