Container with cap, inside plug, and cap with inside plug

Abstract

To provide a container with a cap which enables removal of an inside plug from the container and enables the inside plug to be securely screwed into an end of a thread of a container mouth part even if a user does not know a rotation amount during attachment of the inside plug.SOLUTION: A container includes: a container body 1 having a mouth part including a small diameter mouth part in which a first male screw is provided on an outer peripheral surface, and a large diameter mouth part in which a second male screw is provided on an outer peripheral surface; and an inside plug 2 provided with an annular upper surface 22 located at an outer side relative to a discharge hole for discharging a content and an attachment cylinder provided with a female screw. A cap 4 has: an engagement cylinder 43 provided with a female screw 44; and a tightening cylinder 46 hanging from a rear surface of a top surface. The inside plug 2 may be removed from the small diameter mouth part of the container body, and a plurality of lower end steps 47 arranged in an annular form is provided at a lower end of the tightening cylinder 46 of the cap 4. The annular upper surface 22 of the inside plug 2 is provided with a plurality of engagement parts 23 arranged in the annular form. The lower end steps 47 and the engagement parts 23 are formed so as to engage with each other only in a direction in which the cap 4 is tightened.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a capped container having an inner plug, an inner plug, and a cap with an inner plug. [Background technology]

[0002] In recent years, awareness of the "SDGs (Sustainable Development Goals)" to create a sustainable society has increased dramatically, and in the cosmetics field, containers that allow the contents to be refilled or partially replaced are attracting attention.

[0003] Therefore, Patent Document 1 discloses that the stopper is attached to the container mouth by pressing it with a ring, and when the contents become low, the user can detach the stopper and ring, remove the stopper, and attach only the ring to the container mouth. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5069033 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the above-mentioned document, since the cap and the container mouth are screwed together, and the ring and the container mouth are also screwed together, when a user turns the ring to engage with the container mouth, if the user does not know the amount of rotation, the ring may not be rotated enough. If the ring is not fully engaged with the mouth, the outer cap may not fit properly.

[0006] In view of the above circumstances, the present invention provides a capped container in which the inner plug can be removed from the container and the inner plug can be securely screwed into the container mouth all the way, even if the user does not know the amount of rotation when attaching the inner plug. [Means for solving the problem]

[0007] In order to solve the above problems, in one aspect of the present invention, A container with a cap, The container is A container body having a mouth including a small-diameter mouth portion having a first male screw provided on an outer peripheral surface thereof and a large-diameter mouth portion having a second male screw provided on an outer peripheral surface thereof and being located below the small-diameter mouth portion and having a larger diameter than the small-diameter mouth portion; The container is provided with a discharge hole for discharging the contents, an annular upper surface outside the discharge hole, and an inner plug having a mounting tube with a female screw on an inner peripheral surface below the annular upper surface. The cap is An engagement tube having an internal thread on its inner circumferential surface; A tightening tube having a smaller diameter than the engagement tube is provided below the top surface of the housing. the inside plug is removable from the small diameter opening of the container body; The lower end of the fastening tube of the cap is provided with a plurality of lower end steps arranged in an annular shape, The annular upper surface of the inside plug is provided with a plurality of locking portions arranged in an annular shape in a top view, The lower end steps and the locking portions are formed to engage with each other only in the direction in which the cap is fastened. A container with a cap is provided. Effect of the Invention

[0008] According to one aspect, in a capped container, the inside plug can be removed from the container, and the inside plug can be securely screwed into the container mouth all the way, even if the user does not know the amount of rotation when attaching the inside plug. [Brief description of the drawings]

[0009] [Figure 1] 1 is an overall exploded view of a capped container according to a first embodiment of the present invention; [Diagram 2] 2 is an enlarged cross-sectional view of half of the vicinity of the mouth of the capped container according to the first embodiment. [Diagram 3]2A is a cross-sectional view of the cap according to the first embodiment, and a side view of the inside plug. FIG. [Figure 4] 3A is a bottom view of the cap according to the first embodiment, and FIG. 3B is a top view of the inside plug. [Diagram 5] FIG. 2 is a cross-sectional perspective view of a cap with an inside plug according to the first embodiment. [Figure 6] 13 is a bottom view of a cap and a top view of an inside plug according to the first modified example. FIG. [Figure 7] 11A and 11B are a side view and a top view of an inside plug according to Modification 2. [Figure 8] FIG. 2 is an enlarged transparent view of the mouth portion of the container body according to the first embodiment. [Figure 9] FIG. 4 is an explanatory diagram of the number of threads and thread inclination of the male screw at the mouth of the container body in the first embodiment. [Figure 10] FIG. 2 is an inner perspective view of the cap with an inside plug according to the first embodiment. [Figure 11] 4 is a flowchart showing the process of attaching the inner plug and the cap after replacing the refill according to the present invention. [Figure 12] FIG. 11 is a diagram showing the operation of attaching the inner plug and the cap after replacing the refill according to the first embodiment. [Figure 13] 13 is a diagram showing the positional relationship between the female threads of the inner plug and cap and the male threads of the mouth portion when the cap and inner plug are fully attached to the mouth portion. FIG. [Figure 14] 4 is a flowchart showing the process of attaching the inside stopper and the cap after refilling according to the present invention. [Figure 15] FIG. 5 is an enlarged half cross-sectional view of the vicinity of the mouth of a capped container according to a second embodiment of the container of the present invention. [Figure 16] FIG. 11 is an enlarged half cross-sectional view of the vicinity of the mouth of a capped container according to a third embodiment of the container of the present invention. [Figure 17] 6 is an enlarged half cross-sectional view of the vicinity of the mouth of a capped container according to a second configuration example of the cap of the present invention. FIG. [Figure 18] 13 is an enlarged half cross-sectional view of the vicinity of the mouth of a capped container according to a third configuration example of the cap of the present invention. FIG. [Figure 19] 13 is an enlarged half cross-sectional view of the vicinity of the mouth of a capped container according to a fourth configuration example of the cap of the present invention. FIG. [Figure 20]13 is an enlarged half cross-sectional view of the vicinity of the mouth of a capped container according to a fifth configuration example of the cap of the present invention. FIG. [Figure 21] 13A and 13B are explanatory half-sectional views and explanatory diagrams of the vicinity of the mouth of a capped container relating to a modified example of the rotation end point of the inside plug of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following drawings, the same components are denoted by the same reference numerals, and duplicated explanations may be omitted.

[0011] The present invention relates to a container with a cap, an inner stopper, and a cap with an inner stopper. The container with a cap includes a container having a container body and an inner stopper, and a cap. The cap with an inner stopper includes an inner stopper and a cap. The container is, for example, a self-supporting container having a container part in a cylindrical, elliptical cylindrical, or rectangular prism shape. Alternatively, the container may be a flexible tube container made of resin, metal film, paper, or the like.

[0012] The contents to be stored in the container of the present invention are preferably liquids that are not intended for single use but are intended to be used in small amounts over several uses, such as cosmetics such as beauty serums and sunscreens, or stationery such as glue and ink, and in particular liquids with a content of 30,000cs or less.

[0013] <Overall composition> First, the configuration of a capped container according to a first embodiment will be described with reference to Figures 1 and 2. Figure 1 is an overall exploded view of a capped container according to a first embodiment of the present invention. Figure 2 is an enlarged cross-sectional view of half of the vicinity of the mouth of the capped container according to the first embodiment.

[0014] 1, a capped container 5 includes a container 3 and a cap 4. The container 3 is composed of a container body 1 and an inner plug 2.

[0015] 1 and 2, the container body 1 has an elliptical body 10 in a top view, the lower end of the body 10 being a bottom 11 and the upper end of the body 10 being a shoulder 12. A cylindrical mouth 13 is provided to stand up from the center of the shoulder 12. In this embodiment, the vicinity of the outer edge of the shoulder 12 is an outer edge step 12S that is slightly lower than the center side.

[0016] The mouth 13 has a three-stage cylindrical structure with a small diameter mouth 14 at the top, a large diameter mouth 16 at the bottom, and a mouth root 19 at the bottom. A first male thread 15, which is a helical protrusion, is provided on the outer circumferential surface of the small diameter mouth 14. A second male thread 17, which is a helical protrusion, is provided on the outer circumferential surface of the large diameter mouth 16. An annular protrusion 18 is provided on the outer circumferential surface of the large diameter mouth 16 below the second male thread 17. A pair of rotation stop hooks 19F is provided on the mouth root 19 below the annular protrusion 18.

[0017] In addition, the mouth base portion 19 may be the same thickness as the large diameter mouth portion 16, and the mouth portion 13 may have a two-stage cylindrical shape with at least the small diameter mouth portion 14 on the upper end side and the large diameter mouth portion 16 on the lower side.

[0018] 1 and 2, the inside plug 2 has, from the top, a nozzle 21, an annular upper surface 22, and a tube with a triple structure. In the inside plug 2, below the upper nozzle 21 and the annular upper surface 22, an attachment tube 25, an intermediate tube 28, and a suction tube 29 are provided in a triple concentric configuration.

[0019] Nozzle 21 is a nozzle cylinder with a narrow upper side and a wider lower side, with a discharge hole O formed at the tip (upper end) of nozzle 21. At the bottom center of nozzle 21, a suction cylinder 29, which has a smaller diameter than intermediate cylinder 28 and carries the contents to discharge hole O, is provided.

[0020] When the inside plug 2 is viewed from the outside, an annular upper surface 22, which is a flange surface, is provided below the lower end of the nozzle 21. Annular upper surface 22 is provided with locking recesses 23, which are a plurality of locking portions arranged in a ring shape when viewed from above. The boundaries between the plurality of locking recesses 23 are provided with partitioning protrusions 24, the same number as the locking recesses 23 and which are at the same height as the annular upper surface 22. It is noted that the partitioning protrusions 24 do not necessarily have to be provided.

[0021] An attachment tube 25 is provided below the annular upper surface 22 of the inside plug 2 so as to hang down from the outer edge of the annular upper surface 22. A female thread 26 is provided on the inner peripheral surface of the attachment tube 25, and the outer peripheral surface of the attachment tube 25 has a jagged structure (grommet structure) with multiple slits 27. Note that the slits 27 do not necessarily have to be provided.

[0022] Furthermore, an intermediate tube 28 is provided inside the mounting tube 25, which sandwiches the small diameter opening portion 14 of the container body 1 from the inner peripheral side together with the mounting tube 25. In this embodiment, the container body 1 and the inner plug 2 are airtightly sealed by sandwiching the small diameter opening portion 14 of the container body 1 between the mounting tube 25 and the intermediate tube 28. Note that the intermediate tube 28 does not necessarily have to be provided (see Figs. 16 and 21).

[0023] In the inside plug 2 having such a structure, the mounting cylinder 25 surrounds the small-diameter opening 14 of the container body 1 from the outer periphery, and the female thread 26 of the mounting cylinder 25 threadably engages with the first male thread 15 of the small-diameter opening 14. During normal use, the inside plug 2 is always attached to the small-diameter opening 14 of the container body 1.

[0024] In this embodiment, the cap 4 has a triple-cylinder structure with a top, and includes a top surface 41, a concentric outer peripheral wall 42, an engagement tube 43, and a tightening tube 46. A stoppering projection 48 is provided at the center of the underside of the top surface 41. Note that the engagement tube 43 and the tightening tube 46 of the cap may be partially integrated, and this configuration will be described in detail with reference to FIG.

[0025] The outer peripheral wall 42 is the outermost cylindrical portion and serves as the outer wall. The engagement tube 43 has a smaller diameter than the outer peripheral wall 42, and is provided on its inner peripheral surface with a female thread (helical protrusion) 44. In the female thread 44, a lower portion is a female thread 44a for engagement with the second male thread 17 of the large-diameter opening portion 16, and an upper portion is a female thread 44b that is not used for engagement with the inside plug 2.

[0026] The top surface 41 of the cap 4 is elliptical, and is provided with rotation stoppers 45A and 45B (see FIG. 3) at positions opposing each other in the minor axis direction of the engagement tube 43.

[0027] The tightening tube 46 has a smaller diameter than the engagement tube 43, and the lower end of the tightening tube 46 is provided with a plurality of lower end steps 47 arranged in an annular shape for engagement.

[0028] When the cap 4 is fully attached, the engagement tube 43 surrounds the mouth 13 engaged with the inner plug 2 of the container 3 from the outer periphery, and the female thread 44 of the engagement tube 43 engages with the second male thread 17 of the large-diameter mouth 16. At this time, the annular projection 18 of the mouth 14 is hidden inside the engagement tube 43 of the cap 4, and the rotation stoppers 45A and 45B at the lower end of the engagement tube 43 are clamped between the two rotation stopper hook pairs 19F to stop rotation.

[0029] Next, the engagement between the cap 4 and the inside plug 2 will be described with reference to Figures 3, 4, and 5. Figure 3 is a side cross-sectional view of the cap 4 according to the first embodiment, and a side view of the inside plug 2. Figure 4 is a bottom view of the cap 4 according to the first embodiment, and a top view of the inside plug 2. Figure 5 is a cross-sectional perspective view of the cap with an inside plug according to the first embodiment. In order to show the locking configuration, Figure 5 shows a cut surface offset from the half, and the inside plug 2 is shown as if it were see-through.

[0030] (Mating for co-rotation) As shown in Fig. 3(a), the lower end step 47 at the lower end of the tightening tube 46 of the cap 4 functions like a ratchet tooth and is composed of multiple protrusions (triangular protrusions) that extend downward, each of which is in the shape of a right angle triangle, and each of which is composed of an inclined side 47a and a vertical side 47b. In this embodiment, as shown in Fig. 4(a), the lower end step 47 is composed of eight downward protrusions.

[0031] As shown in Figs. 4(b) and 5, the multiple locking recesses 23 of the inside plug 2 are multiple arc-shaped recesses arranged in a ring shape in top view near the outer edge of the annular upper surface. As shown in Fig. 4(b), in this configuration example, the multiple locking recesses 23 are eight recesses. As shown in Fig. 3(b), the bottom depth of each recess of the multiple locking recesses 23 is formed to be deeper in one circumferential direction. Therefore, the bottom surface of each locking recess 23 is an inclined surface (inclined bottom surface) 23a in the circumferential direction. In addition, a vertical surface (recess vertical wall) 23b that is connected to the inclined surface 23a and falls vertically from the annular upper surface 22 to the deepest part as a boundary with the multiple partition protrusions 24 is provided.

[0032] 3 and 5, when the cap 4 rotates clockwise (tightening direction), the vertical side 47b at the lower end of the tightening tube 46 meshes with the vertical wall 23b of the recess in the annular upper surface 22 of the inside plug 2, and the cap 4 and the inside plug 2 rotate together. On the other hand, when the cap 4 rotates counterclockwise (loosening direction), the inclined side 47a of the triangular protrusion of the tightening tube 46 and the inclined bottom surface 23a of the locking recess 23 of the inside plug 2 move away from each other without interfering with each other, and the cap 4 and the inside plug 2 do not rotate together.

[0033] In this manner, the downward projections of the multiple lower end steps 47 for locking of the cap 4 and the multiple locking recesses 23 of the inside plug 2 engage with each other only in the direction in which the cap 4 is tightened.

[0034] In addition, in Figures 4 and 5, an example is shown in which eight downward protrusions are provided on the lower end step 47 of the tightening tube 46 of the cap 4 and the multiple locking recesses 23 of the inner plug 2 are eight recesses, but the number of downward protrusions and locking recesses 23 may be the same as or a multiple of the number of screw threads (see Figures 6 and 7).

[0035] In this configuration, the female thread 44 provided on the cap 4 is a double-thread thread, and therefore the lower end of the engaging female thread 44a has two ends, which are inserted for screw engagement, provided in two locations in the circumferential direction, as shown by the arrows in Figure 4(a).

[0036] (Female thread structure of cap) 2, and in a state in which the cap 4 is engaged with the container 3, as well as in a state in which the inside plug 2 and the cap 4 are engaged with each other (a state in which the cap is provided with an inside plug) as shown in FIG. 5, the upper inner peripheral side of the female thread 44 of the engagement tube 43 of the cap 4, which is close to the top surface, is hidden by the inside plug 2. That is, in the female thread 44, when the multiple lower end steps 47 of the tightening tube 46 of the cap 4 are engaged with the multiple locking recesses 23 on the upper surface of the inside plug 2 as shown in FIGS. 5 and 10, the portion exposed downward from the lower end of the inside plug 2 is the female thread 44a for engagement used for threaded engagement with the second male thread 17.

[0037] (Modification 1 of the inner stopper) 3 shows an example in which there are eight interlocking structures between the cap and the inside plug in the circumferential direction, but the number of interlocking structures may be any number as long as it is the same as or a multiple of the number of threads in the female thread of the cap. In this example, since the female thread of the cap is a double-start thread, the number of interlocking structures in the circumferential direction is preferably two or a multiple of two, such as four, six, or eight.

[0038] Fig. 6 is a bottom view of the cap and a top view of the inside plug according to the first modified example. In the example of Fig. 6, two downward projections are provided on the bottom step 47α of the tightening tube 46 of the cap 4α, and two locking recesses 23α are formed on the inside plug 2α. In this configuration, the inclined side 47aα of the bottom step 47α and the inclined surface 23aα of the locking recess 23α are inclined over half the circumference in the circumferential direction.

[0039] (Modification 2 of inner stopper) In Figures 1, 2, 4(b), 5, and 6, examples are shown in which the multiple locking portions of the inner plug are locking recesses, but the locking portions of the annular upper surface 22 of the inner plug 2 that lock with the lower end step 47 of the tightening tube 46 of the cap 4 may also be convex portions.

[0040] 7 is an explanatory diagram of a modified inside plug, where (a) is a side view and (b) is a top view. In this configuration, as shown in FIG. 7(b), the multiple locking portions of the inside plug 2β are multiple arc-shaped locking protrusions 230 provided near the outer edge of the annular upper surface 22β.

[0041] In this configuration, each of the multiple locking protrusions 230 is an inclined surface (inclined upper surface) 230a formed on annular upper surface 22β so as to be inclined in one circumferential direction as shown in Fig. 7(a). Locking protrusion 230 has a vertical surface (convex vertical wall) 230b that rises vertically from partition recess 240 on the same plane as annular upper surface 22β toward the upper end of inclined surface 230a.

[0042] For the locking structure of the inner plug 2β of this configuration, the lower end step of the tightening tube of the corresponding cap is provided with two downward projections (not shown). When this cap rotates clockwise (tightening direction), the vertical side of the lower end of the tightening tube meshes with the convex vertical wall 230b of the annular upper surface 22β of the inner plug 2β in Fig. 7(b), and the cap and the inner plug 2β rotate together. On the other hand, when the cap rotates counterclockwise (loosening direction), the inclined side 47a of the triangular projection of the tightening tube 46 and the inclined surface 230a of the locking convex portion 230 of the inner plug 2α move away from each other without interfering with each other, and the cap 4 and the inner plug 2β do not rotate together.

[0043] In this manner, even in this configuration, the downward projections of the multiple locking lower end steps 47 of the cap and the multiple locking protrusions 230 of the inner plug 2β mesh with each other only in the direction in which the cap is tightened. Note that, although Fig. 7(b) shows an example in which the multiple locking protrusions 230 of the inner plug 2β are two protrusions, the number of locking protrusions 230 in this configuration may be any number as long as it is the same as the number of downward protrusions of the tightening tube 46, is two or more, and is a multiple of two.

[0044] In addition, in the two locking recesses 23 of the inside plug in Fig. 6, the inclined surface is inclined over half the circumference and recessed from the other portion, but the locking recesses 23 may be inclined and recessed only in a portion so that the protrusions in Fig. 7 are inverted upside down. On the other hand, in the second modification in Fig. 7, the two locking protrusions 230 of the inside plug are inclined over a 1 / 8 section in the circumferential direction, but the locking protrusions 230 may be inclined and raised over half the circumference. In addition, the number of locking protrusions of the inside plug may be four, six, or eight in the circumferential direction, as long as the number is the same or multiple of the number of threads of the female screw of the cap and the number is the same as the lower end step of the cap.

[0045] (Removing and attaching the inner plug) In addition, the inner plug 2 is removable from the container body 1. Here, since the discharge hole O formed in the inner plug 2 is small, for example, when the remaining amount of the contents becomes small and difficult to remove, removing the inner plug 2 makes it easier to remove the contents remaining in the container body 1 to the last.

[0046] Furthermore, since the inner stopper 2 is detachable from the container body 1, the container body 1 can be replaced as a refill with respect to the inner stopper 2 and the cap 4. In other words, the container body 1 becomes a refill (also called a refill) that can be replaced (removed and replaced (replaceable)) together with the contents. On the other hand, the inner stopper 2 and the cap 4 become reusable parts that can be reused even after replacing the refill.

[0047] Therefore, the empty container body 1 can be replaced with a new refill of the same shape, and the inner plug 2 and the cap 4 can be reused. This reduces the amount of waste resin.

[0048] The container body 1 that can be replaced as a refill can have the upper end of the small diameter opening 14 covered with a film or a cover that surrounds the small diameter opening 14. This allows the container body 1 that is a refill to be distributed alone.

[0049] The inner stopper 2 and the cap 4 may be distributed separately so that a repeat customer who buys and uses a new refill many times can replace the reusable parts when the inner stopper 2 or the cap 4 becomes noticeably dirty, damaged, or deteriorated. Furthermore, as shown in Fig. 10, the cap 6 with the inner stopper 2 and the cap 4 engaged may be distributed.

[0050] Alternatively, since the inner stopper 2 is detachable from the container body 1, when the contents run out, the inner stopper 2 can be removed and the contents can be refilled into the container body 1 from a refillable container such as a pouch.

[0051] As described above, the inside stopper 2 and the container body 1 are screwed together (threaded engagement), and when the inside stopper 2 is removed from the container body 1 when there is little remaining and then reattached, or when the inside stopper 2 is attached after replacing the refill or re-pouring the contents, if the user does not know how much to rotate the inside stopper 2 or is too lazy to do so, the inside stopper 2 may not be rotated enough. However, in the present invention, due to the engagement structure between the tightening tube 46 of the cap 4 and the locking portion formed on the annular upper surface 22 of the inside stopper 2, by subsequently rotating the cap 4, the inside stopper 2, together with the cap 4, can be reliably screwed together with the cap 4 to the end into the mouth 13 of the container body 1, even if the user does not know how much to rotate the inside stopper 2.

[0052] (Screw configuration) Here, the configuration of the screw protrusion will be described with reference to Fig. 3, Fig. 8, Fig. 9, and Fig. 10. Fig. 8 is a see-through enlarged view of the mouth of the container body 1 according to the first embodiment. Fig. 9 is an explanatory view of the number of threads and the inclination of the male screw at the mouth of the container body in the first embodiment. Fig. 10 is an inner perspective view of the cap with an inside plug according to the first embodiment.

[0053] As described above, the inside plug 2 can be removed from the container body 1 by rotating the inside plug 2 relative to the mouth 13 of the container body 1. Therefore, the inside plug 2 and the container body 1 are not provided with a rotation stopper for the inside plug 2 relative to the container body 1.

[0054] When the inside plug 2 is engaged with the mouth portion 13 of the container body 1 , the female thread 26 of the inside plug 2 engages with the first male thread 15 provided on the small diameter mouth portion 14 located at the upper part of the mouth portion 13 .

[0055] 2 and 5, the cap 4 is not threadedly engaged with the inside plug 2, but is threadedly engaged only with the mouth 13 of the container body 1 in the lateral direction. More specifically, the female thread 44 of the cap 4 is engaged with the second male thread 17 provided on the large-diameter mouth portion 16 located at the lower part of the mouth 13.

[0056] 8, the first male thread 15 and the second male thread 17 have the same thread lead at the mouth 13 of the container body 1. In detail, the first male thread 15 and the second male thread 17, which are helical protrusions, have the same "distance traveled in the axial direction when going around the axis along the helix of the thread."

[0057] In detail, in Figure 9, (a) shows an expanded view of the outer peripheral surface of the small diameter part of the mouth of the container body, (b) shows an expanded view of the outer peripheral surface of the large diameter part of the mouth of the container body, and (c) shows a side view of the mouth of the container body.

[0058] In the threads of the mouth 13 of the container body 1, the inclination angle (θ) with respect to the axial direction on the outer circumferential surface of the first male thread 15 of the upper small-diameter mouth 14 shown in Fig. 9(a) is the same as that of the second male thread 17 of the lower large-diameter mouth 16 shown in Fig. 9(b). Therefore, the axial distance (amount of movement) that the cap 4 and the inner plug 2 advance (sink or rise) when the cap 4 is rotated once relative to the mouth 13 is the same as that when the inner plug 2 is rotated once relative to the mouth 13.

[0059] In this configuration, in the mouth portion 13, as shown in FIG. 2, the thread height (hook height) of the second male thread 17 is higher than the thread height of the first male thread 15. Also, as shown in FIG. 9(a) and FIG. 9(b), the pitch between the threads of the second male thread 17 is about three times the pitch of the first male thread 15. And, the circumferential length of the outer circumferential surface of the large diameter mouth portion 16 on which the second male thread 17 is provided is less than twice the circumferential length of the outer circumferential surface of the small diameter mouth portion 14 on which the first male thread 15 is provided. Therefore, in this example, the number of threads of the first male thread 15 is greater than the number of threads of the second male thread 17. 8 and 9, the first male thread 15 is a four-start thread consisting of four inclined protrusions 15-1, 15-2, 15-3, and 15-4, and the second male thread 17 is a double-start thread consisting of two inclined protrusions 17-1 and 17-2. Therefore, in this configuration, the female thread 26 of the inside plug 2, which is the screw engagement destination, is a four-start thread, and the female thread 44 of the cap 4 is a double-start thread.

[0060] The first male thread 15 of the mouth portion 13 and the female thread 26 of the inside plug 2, and the second male thread 17 and the female thread 44 of the cap 4 may be single-start threads or multiple-start threads.

[0061] Due to this relationship, as can be seen in the state of the cap 6 with an inner plug shown in Figure 10, the thread lead of the female thread 44 of the engagement tube 43 of the cap 4 and the thread lead of the female thread 26 of the mounting tube 25 of the inner plug 2 are equal.

[0062] With this type of screw configuration, the rotation of cap 4 relative to mouth 13 and the rotation of inner plug 2 relative to mouth 13 proceed at the same rotational angle. Therefore, when inner plug 2 rotates together with cap 4 in the state shown in Figure 5, the distance they advance in the axial direction is the same, and no adverse effects are caused.

[0063] In addition, the first male thread 15 and the second male thread 17 of the mouth portion 13, the female thread 44 of the cap 4, and the female thread 26 of the inner plug 2 may be single-start threads or multiple-start threads as long as they have the same thread lead.

[0064] (Refill exchange) Next, the operation when replacing the refill will be described with reference to Figs. 11, 12, and 13. Fig. 11 is a flow chart of attaching the inside plug and the cap after replacing the refill. Fig. 12 is a diagram showing the operation of attaching the inside plug and the cap after replacing the refill according to the first embodiment. In Figs. 12(d) to 12(f), the cap is shown in a see-through manner to explain the positional relationship. Fig. 13 is a diagram showing the positional relationship between the female threads of the inside plug and the cap and the male thread of the mouth portion when the cap and inside plug are attached to the mouth portion all the way.

[0065] In step S11 of FIG. 11, first, the inside plug 2 is removed from an old container that has become empty or has a small amount of liquid remaining.

[0066] In step S12, a new refill container for replacement is prepared, and the temporary cap of the prepared refill container is removed.

[0067] In step S13, the inner plug 2 is gently rotated and attached to the container body 1, which is the new refill container (FIG. 12(a)→FIG. 12(b)).

[0068] In step S14, the cap 4 is placed (covered) on the inner plug 2 of the refill container 3 to which the inner plug has been attached (FIG. 12(c)→FIG. 12(d)).

[0069] In step S15, the cap 4 is rotated relative to the refill container 3 to tighten the cap 4. At this time, when the cap 4 continues to rotate and descends a predetermined distance, as shown in Fig. 5, the vertical side 47b of the lower end step 47 at the lower end of the tightening tube 46 engages with the vertical surface 23b of the annular upper surface 22 of the inside plug 2. After engaging in this manner, the inside plug 2 also rotates together with the cap 4 to be tightened relative to the mouth portion 13 (Fig. 12(d) → Fig. 12(e)).

[0070] In step S16, the rotation of the cap 4 is completed and the attachment of the inside plug 2 is also completed (FIG. 12(e)→FIG. 12(f)).

[0071] Here, Fig. 13 is an explanatory diagram showing the positional relationship between the female threads 26, 44 of the inside plug 2 and the cap 4 and the male threads 15, 17 of the mouth portion 13 when the cap 4 and the inside plug 2 are fully attached to the mouth portion 13 as shown in Fig. 12(f), and Fig. 13(a) is a partially enlarged view of the vicinity of the mouth portion. In Fig. 13, the container body 1 is shown in a perspective view, and the cap 4 and the inside plug 2 are shown in a cross-sectional view. Also, Fig. 13(b) is a view showing the mouth portion 13 of the container body 1, the cap 4, and the inside plug 2 slightly separated from each other in the attached state of Fig. 13(a).

[0072] As described above, in the mouth 13 of the container body 1, the first male thread 15 and the second male thread 17 have the same thread lead, and the female thread 44a for engagement of the engagement tube 43 of the cap 4 and the female thread 26 of the mounting tube 25 of the inside plug 2 have the same thread lead. As shown in Figures 13(a) and 13(b), the axial positional relationship between the first male thread 15 of the small-diameter mouth portion 14 and the second male thread 17 of the large-diameter mouth portion 16 in the mouth 13 of the container body 1 is equal to the axial positional relationship between the female thread 26 that fits with the first male thread of the inside plug 2 and the female thread 44a for engagement that fits with the second male thread 17 of the cap 4 when the cap 4 and the inside plug 2 are attached to the mouth 13 until the rotation is completed.

[0073] 12(d)→12(e), when the multiple lower end steps 47 of the tightening tube 46 of the cap 4 engage with the multiple locking recesses 23 on the top surface of the inside plug 2 as shown in Fig. 5, the positional relationship between the female thread 26 of the inside plug 2 and the thread groove of the engaging female thread 44a of the cap 4 becomes equal to the positional relationship between the first male thread 15 and the second male thread 17 on the mouth 13 of the container body 1, as in Fig. 13. In this state, the cap 4 and the inside plug 2 can be rotated together relative to the mouth 13 of the container body 1 up to the end of the screw engagement.

[0074] With this screw configuration, the rotation of the cap 4 relative to the mouth 13 and the rotation of the inner plug 2 relative to the mouth 13 proceed at the same rotational angle, so that the inner plug 2 rotates together with the cap 4 from the state shown in Figure 12(d) to the state shown in Figure 12(f).

[0075] In this embodiment, the container body 1 is provided with a pair of rotation stopper hooks 19F that act as a rotation stopper for the cap 4, and the cap 4 is provided with rotation stoppers 45A and 45B.

[0076] Therefore, in this configuration, when the cap 4 and the inside plug 2 rotate together, the timing at which the cap 4 reaches a fully closed position relative to the container body 1 and the rotation stoppers 45A, 45B are stopped by the two rotation stopper hook pairs 19F is the same as the timing at which the inside plug 2 reaches a fully closed position relative to the container body 1. That is, in step S16, the rotation of the cap 4 is completed and the attachment of the inside plug 2 is completed to the end (FIG. 12(f)).

[0077] Therefore, after replacing the container with a refill container, if the user does not know the amount of rotation of the inner stopper when screwing the inner stopper or is too lazy to do so, the inner stopper will not be rotated enough, but by subsequently rotating the cap, the inner stopper can be securely screwed into the container mouth all the way, even if the user does not know the amount of rotation.

[0078] Although an example of replacing the refill has been described in Fig. 11, the container 3 of the present invention may be a refillable container. Fig. 14 is a flowchart of attaching the inner plug and the cap after refilling according to the present invention.

[0079] In step S21 of FIG. 14, first, the inside plug 2 is removed from the container 3 which has become empty or has a small amount of liquid remaining.

[0080] In step S22, the empty container body 1 is filled (refilled) with the contents from a refill container such as a pouch container.

[0081] In step S23, the inner plug 2 is attached to the filled container body 1 by gently rotating it (FIG. 12(a)→FIG. 12(b)).

[0082] In step S24, the cap 4 is placed (covered) on the inner plug 2 of the filled container 3 with the inner plug 2 attached (FIG. 12(c)→FIG. 12(d)).

[0083] In step S25, the cap 4 is rotated on the filled container 3 to tighten the cap 4. At this time, when the cap 4 rotates and descends a predetermined distance, the vertical side 47b of the lower end step 47 at the lower end of the tightening tube 46 meshes with the vertical surface 23b of the annular upper surface 22 of the inside plug 2, as shown in Fig. 5. When they are in this meshed state, the positional relationship between the female thread 26 of the inside plug 2 and the thread groove of the engaging female thread 44a of the cap 4 becomes equal to the positional relationship between the first male thread 15 and the second male thread 17 at the mouth 13 of the container body 1, as in Fig. 11. Therefore, the inside plug 2 also rotates together with the cap 4 and is tightened against the mouth 13 (Fig. 12(d) → Fig. 12(e)).

[0084] In step S26, the rotation of the cap 4 is completed and the attachment of the inside plug 2 is also completed (FIG. 12(e)→FIG. 12(f)).

[0085] Therefore, in this embodiment, even if the inner stopper is not rotated enough and is incompletely attached when removing it from the container and pouring the contents from the refill container into the container body and then screwing the inner stopper into place, the inner stopper can be reliably screwed into the container mouth all the way by subsequently rotating the cap.

[0086] Second embodiment 15 is a partial cross-sectional view of a capped container 5A according to the second embodiment. In the above embodiment, an example was shown in which the nozzle in the inside plug protrudes upward, but the discharge hole in the inside plug does not have to be provided in the nozzle protruding upward.

[0087] In this embodiment, the inside plug 2A is not provided with a nozzle that protrudes upward, and the discharge hole O1 is provided at the same height as or close to the height of the annular upper surface 22A. Therefore, in the cap 4A of this embodiment, the outer peripheral wall 42A, the engagement tube 43A, and the tightening tube 46A are shorter than those in the first embodiment.

[0088] In this embodiment, the multiple locking recesses 23 of the inside plug 2A and the bottom end steps 47 of the cap 4A have the same shapes as those in the first embodiment. Therefore, the downward projections of the multiple locking bottom end steps 47 of the cap 4A and the multiple locking recesses 23 of the inside plug 2A mesh with each other only in the direction in which the cap 4A is tightened.

[0089] In this embodiment, as in the first embodiment, the first male screw 15 and the second male screw 17 have the same screw lead in the mouth portion 13 of the container body 1. The female screw 44 of the engagement tube 43A of the cap 4A and the female screw 26 of the mounting tube 25 of the inside plug 2A have the same screw lead. When the lower end step 47 and the locking recess 23 are engaged with each other, the axial positional relationship between the female screw 26 in the inside plug 2A and the thread groove of the engagement female screw 44a of the cap 4A becomes equal to the axial positional relationship between the first male screw 15 and the second male screw 17 in the mouth portion 13 of the container body 1. Therefore, the rotation of the cap 4A relative to the mouth portion 13 and the rotation of the inside plug 2A relative to the mouth portion 13 proceed at the same rotation angle, so that when the cap 4A and the inside plug 2A rotate together, the axial advance distance is the same, and no adverse effect occurs.

[0090] Therefore, even in this embodiment, even if the inner stopper is not rotated enough and is incompletely attached when screwing on the inner stopper after replacing the container with a refill container, or after removing the inner stopper from the container and pouring the contents from a refill container, the inner stopper can be reliably screwed on to the container mouth all the way by subsequently rotating the cap.

[0091] Third embodiment FIG. 16 is an enlarged half cross-sectional view of the vicinity of the mouth of a capped container 5B according to the third embodiment of the container of the present invention.

[0092] In this embodiment, container 3B further includes a packing 9, which is a sealing member, that is provided on the upper end of small-diameter opening 14 of container body 1 and receives pressure from the underside of annular upper surface 22 of inner plug 2B. In addition, inner plug 2B does not include an intermediate tube between mounting tube 25 and suction tube 29. Other structures of container body 1 and cap 4 are similar to those of cap 4 in the first embodiment.

[0093] In this embodiment, a packing 9 is provided on the small diameter opening 14 of the container body 1, and the packing 9 is pressed into place by the inner plug 2B, thereby ensuring airtightness between the container body 1 and the inner plug 2B.

[0094] In this embodiment, the multiple locking recesses 23 of the inner plug 2B and the lower end steps 47 of the tightening tube 46 of the cap 4 have the same shapes as in the first embodiment shown in Figures 3 to 5, and the downward protrusions of the multiple locking lower end steps 47 of the cap 4 and the multiple locking recesses 23 of the inner plug 2B engage with each other only in the direction in which the cap 4 is tightened.

[0095] The first male thread 15 and the second male thread 17 of the container body 1 have the same thread lead. Therefore, even in this embodiment, when the inner stopper is screwed in after replacing the container with a refill container, or after removing the inner stopper from the container and pouring the contents from a refill container, even if the inner stopper is not rotated enough and is incompletely attached, the inner stopper can be reliably screwed in and attached to the container mouth all the way by rotating the cap thereafter.

[0096] 15 and 16, the engagement structure consisting of the bottom step 47 of the cap and the annular upper surface 22A, 22 of the inside plugs 2A, 2B may be two as shown in Fig. 6, or another number that is a multiple of the number of threads on the cap. The locking portion on the inside plugs 2A, 2B side may be a structure in which the locking protrusions 230 shown in Fig. 7 are provided, and in that case, the number of locking protrusions may be either the same as or a multiple of the number of threads on the cap, so long as it is the same as the downward projections of the bottom step.

[0097] (Second example of cap configuration) 17 is an enlarged half cross-sectional view of the vicinity of the mouth of a capped container 5C according to a second configuration example of the cap of the present invention. In the following Figs. 17 to 20, the configuration of a container 3 consisting of a container body 1 and an inside plug 2 is the same as in the first embodiment.

[0098] The cap 4C of this configuration example differs from the first embodiment in that it does not have an outer peripheral wall and the top surface 41C is substantially the same as the outer shape of the engagement tube 43, but the other structures are the same as the cap 4 of the first embodiment. In this configuration example, since the cap 4C does not have an outer peripheral wall, the amount of resin used during cap molding can be reduced accordingly. In this configuration example, since there is no outer peripheral wall, the top view of the cap 4C is limited to a circular shape.

[0099] (Third example of cap configuration) FIG. 18 is an enlarged half cross-sectional view of the vicinity of the mouth of a capped container 5D according to a third configuration example of the cap of the present invention.

[0100] In the cap 4D of this configuration example, the base of the engagement tube 43D is thick, and the outer periphery of the tightening tube is connected to the inner periphery of the engagement tube. More specifically, in the cap, the tightening tube is shorter in the downward direction than the engagement tube. Therefore, in this configuration, the upper inside of the engagement tube 43D has a step shape, so that the outer periphery of the tightening tube 46D is connected to the inner periphery of the engagement tube 43D.

[0101] In addition, in this configuration, since the engagement tube 43D and the tightening tube 46D are integrated in the cap 4D, it can be adapted even if the mounting tube 25 of the inside plug 2 becomes thinner, for example.

[0102] (Fourth configuration example of the cap) FIG. 19 is an enlarged half cross-sectional view of the vicinity of the mouth of a capped container 5E according to a fourth configuration example of the cap of the present invention.

[0103] In this configuration example, the base (upper end side) of the engagement tube 43E of the cap 4E is recessed toward the inner diameter side, and the outer periphery of the tightening tube 46E is connected to the inner periphery of the engagement tube. Furthermore, as in Fig. 17, the cap 4E does not have an outer periphery wall. In this configuration example, since there is no outer periphery wall, the top view of the cap 4E is limited to a circular shape.

[0104] In addition, in this configuration, the engaging tube 43E and the tightening tube 46E are integrated in the cap 4E, so that it can accommodate a thinner mounting tube 25 of the inside plug 2, for example, and the amount of resin in the cap can be reduced compared to the configuration in Figure 18.

[0105] (Fifth example of the cap configuration) Fig. 20 is an enlarged half cross-sectional view of the vicinity of the mouth of a capped container 5F according to a fifth configuration example of the cap of the present invention. Although Figs. 1 to 19 show examples in which the cap is made of one member, the cap may be made of two or more members.

[0106] The cap 4F of this configuration example is composed of two members, an outer cap 7 and an inner cap 8. The outer cap 7 has a top surface 71 and an outer peripheral wall 72. The outer peripheral wall 72 is the outermost cylindrical portion and serves as the outer wall.

[0107] The inner cap 8 is provided inside the outer cap 7, and includes a top surface 85, an engagement tube 83 which is a double tube that hangs down from the top surface 85, and a fastening tube 86, and a stopper projection 88 is provided at the center of the bottom surface of the top surface 85. Furthermore, the inner cap 8 is provided with a fitting tube 81 which fits into the inside surface of the outer peripheral wall 72 of the outer cap 7, and a connecting slope 82 is provided to connect the fitting tube 81 and the lower end of the engagement tube 83. A screw projection (female thread) 84 is provided on the inner peripheral surface of the engagement tube 83. Furthermore, the lower end of the fastening tube 86 is provided with a plurality of lower end steps 87 arranged in an annular shape for engagement.

[0108] In this embodiment, the multiple locking recesses 23 of the inside plug 2 and the bottom end steps 87 provided on the inner cap 8 of the cap 4F have the same shapes as those in the first embodiment shown in Figures 3 to 5. Therefore, the downward projections of the multiple locking bottom end steps 87 of the cap 4F and the multiple locking recesses 23 of the inside plug 2 mesh with each other only in the direction in which the cap 4F is tightened.

[0109] Therefore, even when the caps in Figures 17 to 20 are applied, even if the inner stopper is not rotated enough and is incompletely attached when screwing on the inner stopper after replacing the container with a refill container, or after removing the inner stopper from the container and pouring the contents from a refill container, the inner stopper can be reliably screwed on to the container mouth all the way by subsequently rotating the cap 4F.

[0110] In addition, the second to fifth configuration examples of the cap in Figures 17 to 20 show examples of engaging with the configuration of the first embodiment of the inside plug 2, but the caps in Figures 17 to 20 may also be applied to the containers 3A and 3B shown in Figures 15 and 16.

[0111] 17 to 20, the number of locking recesses of the inner plug attached to the container may be two as shown in Fig. 6 or another number that is a multiple of the number of threads on the cap, so long as it is the same number as the downward projections on the bottom step. Also, the locking portion on the inner plug side may have a structure in which locking protrusions 230 shown in Fig. 7 are provided, and in that case, the number of locking protrusions may be either the same as or a multiple of the thread count on the cap, so long as it is the same as the downward projections on the bottom step.

[0112] <Embodiment 4 of the Cap and Mouth> In the above embodiment, an example was described in which a rotation stopper was provided on the cap and the mouth of the container body to stop the rotation of the cap. However, a rotation stopper for determining the rotation position of the cap relative to the mouth may not be provided. In a configuration in which a rotation stopper is not provided on the cap and the mouth, the timing at which the cap completely closes and stops relative to the container body and the timing at which the inside plug completely closes and stops relative to the container body may be slightly different.

[0113] 21 is a half cross-sectional explanatory diagram of the vicinity of the mouth of a capped container according to a modified example of the rotation end point of the inside plug of the present invention. In this embodiment, an elastically deformable packing 9G is provided on the small-diameter opening 14G of the container body 1G, and the packing 9G comes into contact with the inside plug 2G, thereby ensuring airtightness between the container body 1G and the inside plug 2G. In addition, the capping projection 48 of the cap 4G comes into contact with the discharge hole O of the inside plug 2G, thereby ensuring airtightness between the cap 4G and the inside plug 2G.

[0114] In this embodiment, compared to other embodiments, the protruding length of the nozzle 21G of the inside plug 2G is shorter relative to the size of the cap 4G and the container body 1G, and the mounting tube 25G is slightly longer and the circumferential distance of the female thread 26G is longer. Therefore, in the mouth portion 13G of the container body, the circumferential length of the first male thread 15G is longer relative to the second male thread 17 than in other embodiments. Also, in the cap 4G, the tightening tube 46G is slightly shorter relative to the engagement tube 43 and the outer peripheral wall 42. And, no mechanism is provided for preventing the cap 4G from rotating relative to the container body 1G.

[0115] In this embodiment as well, the thread lead of the female thread 44a for engagement of the engagement tube 43 of the cap 4G is equal to that of the female thread 26G of the mounting tube 25G of the inside plug 2G.

[0116] In this embodiment, after replacing the container with a refill container or pouring the contents from a refill container, when threading the inside stopper 2G to the mouth portion 13G as shown in Fig. 12(d), the inside stopper 2G is lightly rotated relative to the mouth portion 13G, and then the cap 4G is rotated relative to the mouth portion 13G. Then, after rotating a predetermined distance, as shown in Fig. 21(a), when the multiple lower end steps 47 of the tightening tube 46G of the cap 4G are engaged with the multiple locking recesses 23G on the upper surface of the inside stopper 2G, the distance between the female thread 26G of the inside stopper 2G that fits with the first male thread 15G and the engaging female thread 44a of the cap 4G that fits with the second male thread 17 becomes equal to the axial distance between the first male thread 15G and the second male thread 17 of the mouth portion 13G. With this configuration, when the multiple lower end steps 47 of the cap 4G engage with the multiple locking recesses 23G on the upper surface of the inner plug 2G and the above-mentioned screw position relationship is satisfied as shown by the arrow, the cap 4G and the inner plug 2G can be rotated together relative to the container body 1G up to the end of the screw engagement between the cap 4G and the container body 1G.

[0117] However, in this embodiment, since there is no rotation stopper, as the cap 4G continues to be tightened, the outer peripheral wall 42 hits the shoulder 12 of the container body 1G or stops at the end point of the cap's screw engagement. At that time, as shown in Fig. 21(a), the inside plug 2G does not have to be completely tightened against the mouth 13G, and this is effective as long as the inside plug 2G comes into contact with the packing 9G to ensure airtightness between the inside plug 2G and the container body 1G. That is, in this embodiment, the inside plug 2G does not tighten completely due to the co-rotation of the inside plug 2G and the cap 4G.

[0118] Then, when opening the cap 4G and using the container 3G, the user can further tighten the inside plug 2G by rotating it alone relative to the container body 1G, as shown in FIG. 21(b).

[0119] In this embodiment, when the cap 4G is tightened again after the inside plug 2G is tightened, the cap 4G is in a completely closed state, and the rotation restriction by the lower end step 47 of the tightening tube 46G of the cap 4G and the multiple locking recesses 23G of the inside plug 2G remains released as shown in Fig. 21(c). Even in this state, the capping projection 48 of the cap 4G comes into contact with the discharge hole O of the inside plug 2G, so that the cap 4G and the inside plug 2G are kept airtight. In this embodiment, the rotation restriction mechanism by the lower end step 47 and the multiple locking recesses 23G does not come into contact with each other when the inside plug 2G is removed from the container body 1G after assembly at the time of manufacture, when refilling the contents or replacing it as a refill for the container body 1G, but this does not cause any problem.

[0120] In this embodiment, since there is no rotation stopper for regulating the positional relationship between the cap and the container body, the cap is circular when viewed from above so that circumferential positioning is not required. In Fig. 21, a configuration in which an outer peripheral wall is provided on the cap is shown, but as shown in Figs. 17 and 19, the cap may be circular when viewed from above by not providing an outer peripheral wall on the cap.

[0121] In the modified rotation end point of Fig. 21, an example of engagement with the configuration of the first embodiment of the inside plug 2 is shown, but the number of locking recesses of the inside plug applied to a capped container having the rotation end point of Fig. 21 may be two as shown in Fig. 6 or another number that is a multiple of the number of threads on the cap, so long as it is the same number as the downward projections of the bottom end step. Also, the locking portion on the inside plug side may have a structure in which the locking protrusions 230 shown in Fig. 7 are provided, and in that case, the number of locking protrusions may be either the same as or a multiple of the thread count of the cap, so long as it is the same as the downward projections of the bottom end step.

[0122] Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and various modifications and changes are possible within the scope of the gist of the embodiments of the present invention described in the claims. [Explanation of symbols]

[0123] 1, 1A, 1B Container body 2, 2α, 2β, 2A inner plug 3, 3A, 3B container 4, 4A, 4B, 4C, 4D, 4E, 4F, 4G Cap 5, 5A, 5B, 5C, 5D, 5E, 5F Containers with caps 6 Cap with inner plug 7 Outer cap 8 Inner Cap 9, 9G Gasket (sealing material) 13 Mouth 14 Small diameter mouth 15 First male screw (helical protrusion) 16 Large diameter mouth 17 Second male screw (helical protrusion) 18 Annular protrusion 19 Mouth base 19F Anti-rotation hook pair 21 Nozzle 22 Circular top surface 23 Locking recess (locking portion) 23a Slanted surface (slanted bottom surface) 23b Vertical surface (recess vertical wall) 230 Locking protrusion (locking portion) 230a Slanted surface (sloped top surface) 230b Vertical surface (convex vertical wall) 24 Partition protrusion 240 Partition recess 25 Mounting tube 26 Female thread (inner spiral protrusion) 27 Slit 28 Intermediate tube 29 Suction tube 41 Top 42 Outer wall 43 Engagement tube 44 Female thread (inner spiral protrusion) 44a Female thread for engagement 44b Female thread to prevent adhesion 45A, 45B Rotation stopper 46 Fastening tube 47 Lower end step (triangular protrusion, step for locking) 47a Slope side 47b Vertical edge 48 Stopper protrusion O Discharge hole

Claims

1. A container with a cap, The container is a container body having a mouth including a small-diameter mouth portion having a first male screw provided on an outer peripheral surface thereof, and a large-diameter mouth portion having a second male screw provided on an outer peripheral surface thereof and being located below the small-diameter mouth portion and having a larger diameter than the small-diameter mouth portion; The container is provided with a discharge hole for discharging the contents, an annular upper surface outside the discharge hole, and an inner plug having a mounting tube with a female screw on an inner peripheral surface below the annular upper surface. The cap is An engagement tube having an internal thread on its inner circumferential surface; A tightening tube having a smaller diameter than the engagement tube is provided below the top surface of the housing. the inside plug is removable from the small diameter opening of the container body; The lower end of the fastening tube of the cap is provided with a plurality of lower end steps arranged in an annular shape, The annular upper surface of the inside plug is provided with a plurality of locking portions arranged in an annular shape in a top view, The lower end steps and the locking portions are formed to engage with each other only in the direction in which the cap is fastened. Container with cap.

2. The plurality of lower end steps of the fastening tube are formed of a plurality of triangular projections having a right-angled side that falls vertically and an inclined side, The plurality of locking portions of the inside plug are a plurality of arc-shaped locking recesses provided annularly in a top view in the vicinity of an outer edge of the annular upper surface, Each of the plurality of engagement recesses has an inclined bottom surface that is inclined so that the bottom depth becomes deeper in one circumferential direction, and a recess vertical wall that vertically descends from the annular upper surface toward the deepest part of the inclined bottom surface. The capped container according to claim 1.

3. The plurality of lower end steps of the fastening tube are formed of a plurality of triangular projections having a right-angled side that falls vertically and an inclined side, The plurality of locking portions of the inside plug are a plurality of arc-shaped locking protrusions provided annularly in a top view in the vicinity of an outer edge of the annular upper surface, Each of the plurality of locking protrusions has an upper surface that is an inclined surface that is inclined so as to become deeper in one circumferential direction, and has a protrusion vertical wall that rises vertically from the annular upper surface toward the upper end of the inclined surface. The capped container according to claim 1.

4. The mounting cylinder of the inside plug surrounds the small-diameter opening of the container body from the outer periphery side, and the female thread of the mounting cylinder engages with the first male thread, The engaging tube of the cap surrounds the mouth portion from the outer circumferential side, and the female thread of the engaging tube engages with the second male thread. The capped container according to claim 1.

5. When the multiple lower end steps of the tightening tube of the cap are engaged with the multiple locking portions on the upper surface of the inside plug, the axial positional relationship between the female thread in the inside plug and the female thread for engagement of the cap becomes equal to the axial positional relationship between the first male thread in the mouth of the container body and the second male thread, and the inside plug can rotate together with the cap in the direction in which the cap is tightened. A container with a cap according to any one of claims 1 to 4.

6. The inner plug has a nozzle cylinder that protrudes upward and has the discharge hole formed at a tip thereof, The annular upper surface is located below the nozzle cylinder. The capped container according to claim 1.

7. An inner plug to be attached to the mouth of a container body with which a cap is engaged, The container body has a mouth portion including a small-diameter mouth portion having a first male screw provided on an outer circumferential surface thereof and a large-diameter mouth portion below the small-diameter mouth portion and having a second male screw provided on an outer circumferential surface thereof; The inner plug is A discharge hole having a diameter smaller than that of the mouth portion; an annular upper surface outer than the discharge hole; A mounting cylinder is formed below the annular upper surface and has an internal circumferential surface on which a female screw is provided, the inside plug is removable from the small diameter opening of the container body; The annular upper surface of the inside plug is provided with a plurality of locking portions arranged in an annular shape in a top view, the locking portions being formed so as to engage with a portion of the cap only in the direction in which the cap is tightened. Inner stopper.

8. The inside plug according to claim 7, A cap with an inner plug, the cap comprising: a cap that can be engaged with a mouth portion of the container body, The cap is An engagement tube having an internal thread on its inner circumferential surface; A tightening tube having a smaller diameter than the engagement tube is provided below the top surface of the housing. A plurality of lower end steps are provided in a circular arrangement at the lower end of the fastening tube, The annular upper surface of the inside plug is provided with a plurality of locking portions arranged in an annular shape in a top view, The lower end steps and the locking portions are formed to engage with each other only in the direction in which the cap is fastened. Cap with inner plug.

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