Shift plug cap

Abstract

To provide a shift plug cap capable of preventing torque between a mouth of a container body and an inside plug from decreasing, even when stored at high temperature.SOLUTION: A shift plug cap according to the present invention comprises: an inside plug B fitted on a container body A and having a shift plug body 13 which, with the rotation of a screw cap C, opens and shifts to the screw cap C; and the screw cap C screwed onto the inside plug B. The container body A is provided with a locking projection 2 which is circumferentially provided on the outer periphery of a mouth part 1 and prevents the inside plug B from coming out, and a plurality of locking ribs 3 which are protruded from the outer periphery of the locking projection 2. The inside plug B has: an outer cylinder 6 on the outer circumference side into which the mouth part 1 fits; a locking projecting part 30 protruding from the lower portion of the inner circumference of the outer cylinder 6 and engaging with the lower portion of the locking projection 2; a plurality of engaging ribs 36 protruding from the inner circumference above the locking projecting part 30 and engaging with the locking ribs 3 when the cap is attached; and a plurality of guide ribs 37 protruding from the lower portion of the locking projecting part 30 toward the lower end of the inner circumference of the outer cylinder 6 and guiding the locking ribs 3 when the plug is fitted.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a transfer plug cap provided with an inner plug having a transfer plug body, and more particularly to a transfer plug cap that can be opened by rotating a screw cap in the opening direction.

Background Art

[0002] Conventionally, as a food container for storing contents such as dressings, the inside of the container body is sealed with an inner plug having a transfer plug body until it is opened, and by rotating a screw cap that is screwed and attached to the inner plug in the opening direction, A transfer plug cap is known that can remove the transfer plug body from the inner plug, hold the transfer plug body in the engaging portion of the screw cap, and open it (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the transfer plug cap described in Patent Document 1 above can suppress the accumulation of contents on the back surface of the transfer plug body transferred to the screw cap when opening the lid. However, when stored at high temperature, the mouth of the container body may deform radially outward and the torque between the mouth of the container body and the inner plug may decrease. When the torque decreases, there is a problem that the inner plug may rotate together with the screw cap and the thin-walled weakened portion of the transfer plug body may not be broken.

[0005] An object of the present invention is to solve the above problems and provide a transfer plug cap that can suppress a decrease in torque between the mouth of the container body and the inner plug even when stored at high temperature.

Means for Solving the Problems

[0006] In order to solve the above problems, the present invention provides a transition plug cap comprising: an inner plug having a transition plug body that is attached to the mouth of a container body by screwing and that can be opened and transitioned to a screw cap by rotating the screw cap; and a screw cap that is screwed onto the inner plug and detachably attached thereto. The container body includes a locking ridge that is provided around the outer circumference of the mouth and prevents the inner plug from coming off, and a plurality of locking ribs that project from the outer circumference of the locking ridge. The inner plug includes an outer cylinder on the outer peripheral side into which the mouth of the container body is fitted, a locking projection that projects from the lower part of the inner circumference of the outer cylinder and engages with the lower part of the locking ridge, a plurality of engaging ribs that project from the inner circumference above the locking projection and engage with the locking ribs during attachment, and a plurality of guide ribs that project from the lower part of the locking projection toward the lower end of the inner circumference of the outer cylinder and guide the locking ribs during screwing. The present invention adopts a configuration characterized by these features.

[0007] As an embodiment of the transition plug cap, the guide ribs are configured to project from a position shifted from the engaging ribs so as not to overlap, and the locking ribs are configured to project in a vertical rib shape along the axial direction from the outer circumference of the locking ridge and have an R-shaped upper end. Also, the guide ribs are configured to have an inclined surface formed at the lower end.

Effects of the Invention

[0008] By adopting the above configuration, after the transition plug cap is attached to the mouth of the container body by screwing, when the screw cap is rotated relative to the container body during opening, the inner plug can be reliably rotated relative to the screw cap without the inner plug rotating in a circumferential direction, and the opening can be performed.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0010] Next, the transition plug cap of the present invention will be described with reference to the drawings by giving examples. In the following description, with reference to Fig. 1 (a), the vertical direction is the "axial direction", the upward direction is the "upper", the downward direction is the "lower", and the left-right direction is the "radial direction".

[0011] (Example) In Fig. 1 (a), A is the container main body, B is the middle plug which is attached to the container main body A by plugging, and C is the screw cap which is screwed to the middle plug B and is detachably attached.

[0012] As shown in Fig. 1, Fig. 2 (b) and Fig. 3, on the upper outer periphery of the mouth part 1 of the container main body A, a locking protrusion 2 for fitting and retaining the middle plug B is provided, and on the outer periphery of the locking protrusion 2, a plurality of locking ribs 3 are arranged, the upper end 3r of which is formed in an R shape and the outer periphery is perpendicular at a height L. In this embodiment, as shown in FIGS. 2(b) and 3(a), the locking rib 3 includes a central rib 3a disposed at four positions of 0°, 90°, 180°, and 270° when viewed from above, and on both sides of the two central ribs 3a located at 90° and 270° opposite thereto, there are formed side ribs 3b disposed at intervals of 6° and 10 each in a range of 60° respectively. Also, when looking at the locking rib 3 formed on the outer periphery of the locking protrusion 2 from a different perspective, 21 locking rib groups 3c including the central rib 3a are disposed in a range of 60° each (total 120°) on both sides at the 90° position and the 270° position when viewed from above, and at the 0° position and the 180° position, there are formed space portions 3d where no protrusions other than one central rib 3a are provided in a range of 30° each on both sides (total 60°). The central ribs 3a at the 0° position and the 180° position in this embodiment are provided on the parting of the container body A. In this embodiment, locking rib groups 3c are disposed at the 90° position and the 270° position when viewed from above, and space portions 3d are formed at the 0° position and the 180° position. However, a plurality (60) of locking ribs 3 may be disposed at intervals of 6° over the entire outer periphery of the locking protrusion 2. Also, if the locking ribs 3 are disposed at equal intervals and the meshing ribs 36 and guiding ribs 37 of the inner stopper B described later can mesh between any of the locking ribs 3, the intervals and the number over the entire circumference can be set as appropriate.

[0013] As shown in FIGS. 1, 2, and 4, the inner stopper B is composed of an outer cylinder 6 on the outer peripheral side, an inner cylinder 7 on the inner peripheral side, and an upper wall 8 located on the top surface side of the mouth portion 1. It includes a mounting portion 5 that forms an annular groove into which the mouth portion 1 of the container body A is fitted, a threaded wall portion 9 erected from the mounting portion 5, a top wall 10 extending inward from the upper end of the inner circumference of the threaded wall portion 9, and a pouring cylinder 11 erected from the upper surface of the top wall 10.

[0014] The pouring cylinder 11 serves as a pouring outlet that guides the contents accommodated in the container body A through the inner circumference and pours them out from the tip. At the lower end of the inner circumference, a transfer plug body 13 is integrally connected via a thin-wall weakening portion 12 formed over the entire circumference. The transition plug body 13 includes a ring-shaped peripheral edge portion 14 connected to the inner circumference of the thin-walled weakened portion 12, a cylindrical wall 15 formed inside the peripheral edge portion 14, and a circular central bottom wall 17 that seals the inner circumferential side of the lower end of the cylindrical wall 15 and has a columnar protrusion 16 erected at the center.

[0015] The peripheral edge portion 14 has an annular concave groove 18 recessed from the lower surface to a predetermined height, and a first engaging protrusion 19 that constitutes a first engaging portion is provided around the lower outer circumference. On the upper outer circumference, fitting recesses 20 that constitute a first fitting portion and fit with a second fitting portion provided on a screw cap C described later are notched from the outer circumference at positions of 0° and 180° with respect to the axis. Between the fitting recesses 20 of each other, a cutout portion 21 formed in an arc shape along the cylindrical wall 15 is recessed from the upper surface. In this embodiment, the first fitting portion is embodied as the fitting recesses 20 at positions of 0° and 180° with respect to the axis of the upper outer circumference of the transition plug body 13. However, as long as the first fitting portion has unevenness that fits with the second fitting portion of the screw cap C in the circumferential direction of the transition plug body 13, the number and shape are not limited.

[0016] The screw wall portion 9 has a male screw portion 25 that constitutes a first screw portion screwed on the outer peripheral surface, and a plurality of reinforcing ribs 26 that connect the upper portion to the top wall 10 and extend in the axial direction are arranged on the inner peripheral surface. As shown in FIG. 1(b), the male screw portion 25 is composed of an inclined upper surface 25a formed with a steep inclination on the upper surface and a flat lower surface 25b formed flat, like a normal thread, and the cross section is not vertically symmetric. The upper end portion is formed by two threads starting at 180° intervals, and the thread height α of the male screw portion 25 is formed lower than that of a normal thread. In this embodiment, the male screw portion 25 has two threads, but according to the height of the screw wall portion 9, it can be a multi-threaded screw of three or more threads.

[0017] As shown in FIGS. 1(a), 2(a), and 4, the top wall 10 is provided with a stepped portion 27 recessed on the outer peripheral side, and a sound-emitting protrusion 28 is arranged on the inner peripheral side of the stepped portion 27.

[0018] The outer cylinder 6 is provided at its lower inner periphery with a locking projection 30 whose upper part engages with the lower part of the locking rib 2 of the container body A to prevent the mouth part 1 from coming off. At the inner periphery above the locking projection 30, a locking recess 31 that engages with the outer periphery of the locking rib 3 at approximately height L is recessed from the inner peripheral surface. At the outer periphery above the locking projection 30, a notch recess 32 is recessed from the outer peripheral surface. The lower part of the notch recess 32 is provided with a separation mechanism F that allows the middle plug B to be separated from the container body A for separate disposal. As shown in FIG. 4, the separation mechanism F is provided with a gripping part 34 via a slit 33 formed axially over a predetermined arc range on the lower outer peripheral surface of the outer cylinder 6. The gripping part 34 is separated from the outer cylinder 6 by a thin vertical cutting part 35 and can be unfolded outward. Further, the notch recess 32 can be easily broken, facilitating the removal of the middle plug B from the container body A.

[0019] A plurality of engaging ribs 36 that mesh with the locking rib 3 are disposed over the entire circumference on the inner periphery of the locking recess 31. In this embodiment, as shown in FIGS. 2(b) and 4(b), twenty engaging ribs 36 are disposed at intervals of 18° as viewed from above and mesh with a position between any two of the locking ribs 3 (shifted 3° with respect to the locking rib 3).

[0020] At the lower part of the locking projection 30, a plurality of guide ribs 37 are radially projected toward the lower end of the inner periphery of the outer cylinder 6. The guide ribs 37 mesh with the locking rib 3 and are arranged at shifted positions so as not to overlap the engaging ribs 36 over the entire circumference. The lower end of the guide rib 37 is formed with an inclined surface 37a. The inclined surface 37a of the guide rib 37 may also be in an R shape, similar to the upper end portion 3r of the locking rib 3. In this embodiment, the guide ribs 37 are arranged at intervals of 36° as viewed from above and mesh with a position between any two of the respective locking ribs 3 (shifted 3° with respect to the locking rib 3), and are arranged at positions shifted 6° with respect to the engaging ribs 36, with ten guide ribs 37 provided. In this embodiment, the engagement ribs 36 are arranged at 18° intervals, the guide ribs 37 are arranged at 36° intervals, and they are arranged at positions where they do not overlap with the engagement ribs 36. However, if they can engage with each other between any of the locking ribs 3, the number and intervals of the engagement ribs 36 and the guide ribs 37 may be set as appropriate.

[0021] As shown in FIGS. 1, 2, and 5, the screw cap C includes a disk-shaped top wall 40 and an outer peripheral wall 41 vertically provided from the outer peripheral edge of the top wall 40. On the inner surface of the top wall 40, a sealing cylinder portion 43 and a screw cylinder portion 44 are vertically provided concentrically from the inside. Further, between the sealing cylinder portion 43 and the screw cylinder portion 44, a sound generating member 45 is disposed at a position that engages with the sound generating protrusion 28 on the top wall 10 of the middle plug B.

[0022] The sealing cylinder portion 43 is provided with a seal portion 47 on the outer periphery that abuts against the inner peripheral surface of the pouring cylinder 11 to seal the pouring port when the screw cap C is attached to the middle plug B. At the lower end of the inner periphery, a second engaging protrusion 48 that constitutes a second engaging portion that rides over and fits with the first engaging protrusion 19 on the peripheral edge portion 14 of the transfer plug body 13 is provided around the periphery. At the upper part of the inner periphery, fitting protrusions 49 that protrude radially inward and constitute second fitting portions that fit into the fitting recesses 20 of the transfer plug body 13 from above are arranged in the same number as the fitting recesses 20.

[0023] The screw cylinder portion 44 is provided with an internal thread portion 50 that constitutes a second thread portion that screws into the male thread portion 25 of the middle plug B on the inner periphery. As shown in FIG. 1(b), the internal thread portion 50 is composed of a flat upper surface 50a whose cross-section is not vertically symmetric like a normal thread and whose upper surface is formed flat, and an inclined lower surface 50b whose lower surface is formed with a steep inclination. The internal thread portion 50 is formed in a shape and number of threads that screw into the male thread portion 25. Also, the thread height β of the internal thread portion 50 is formed lower than the normal thread height similar to the male thread portion 25. Furthermore, when the male thread portion 25 and the internal thread portion 50 are screwed together, the engagement γ between the tips of the threads is set smaller than in the prior art.

[0024] As shown in FIGS. 1(a), 2(a) and 5, the sound generating member 45 is composed of a rigid plate-like base portion 52 vertically provided from the lower surface of the top wall 40 between the screw cylinder portion 44 and the sealing cylinder portion 43, and a rod-shaped vibrating piece 53 vertically provided from the base portion 52 and formed to be elastically deformable. Just before the tightening of the screw cap C is completed, the tip of the vibrating piece 53 abuts against the sound generating protrusion 28 of the middle plug B, and while the vibrating piece 53 is bent and deformed, the tightening proceeds. At the same time as the tightening is completed, the vibrating piece 53 gets over the sound generating protrusion 28 and tries to restore itself, so that it vibrates and generates sound.

[0025] Next, the usage mode and the working effects of this embodiment will be described. For the transfer plug cap of this embodiment, after the middle plug B and the screw cap C are separately molded, the screw cap C is plugged onto the upper part of the middle plug B to be set as the transfer plug cap, and then the mounting portion 5 of the middle plug B is plugged onto the mouth portion 1 of the container body A.

[0026] For the container body A of this embodiment, as a mold that sandwiches the molded body before and after, as shown in FIGS. 3(a), when it is divided into front and rear at the 0° position and the 180° position as viewed from above, the mold is symmetrically divided in the front and rear by the central rib 3a in the middle of the left and right space portions 3d of the locking protrusion 2, so the left and right shape retention properties are good and no unnecessary burrs are generated. Furthermore, when the mold is demolded, since the sides of the left and right central ribs 3a are the space portions 3d, there is no catching between the mold and each locking rib 3 of the locking rib group 3c in the front-rear direction, and the mold can be smoothly demolded.

[0027] When setting the screw cap C on the middle plug B, first, the fitting convex portion 49 inside the sealing cylinder portion 43 of the screw cap C is aligned and inserted from above each fitting concave portion 20 at the peripheral portion 14 of the transfer plug body 13 of the middle plug B, and the screw cap C is pushed into the middle plug B. From this state, when the screw cap C is pushed into the middle plug B, the inclined lower surface 50b at the lowermost part of the female screw portion 50 of the screw cylinder portion 44 of the screw cap C gets over while abutting against the inclined upper surface 25a at the uppermost part of the male screw portion 25 of the screw wall portion 9 of the middle plug B.

[0028] As the pushing-in of the screw cap C progresses, the female screw portion 50 and the male screw portion 25 mesh with each other over the entire range, and the outward expansion of the screw cylinder portion 44 in the outer circumferential direction is released and restored. At the same time, the second engaging protrusion 48 of the sealing cylinder portion 43 rides over and fits into the first engaging protrusion 19 formed on the peripheral edge portion 14 of the transfer plug body 13 of the middle plug B, and the pushing-in is completed. At the same time, as shown in FIG. 1, the lower end surface of the screw cylinder portion 44 of the screw cap C gently abuts on the upper surface of the upper wall 8 of the middle plug B, or a slight gap is formed and they are in a proximate state, and the set as the transfer plug cap is completed.

[0029] After the set of the transfer plug cap, the respective fitting convex portions 49 inside the sealing cylinder portion 43 of the screw cap C fit into the respective fitting concave portions 20 on the peripheral edge portion 14 of the transfer plug body 13 of the middle plug B. Further, the second engaging protrusion 48 of the sealing cylinder portion 43 and the first engaging protrusion 19 formed on the peripheral edge portion 14 of the transfer plug body 13 of the middle plug B fit together, and the transfer plug body 13 is engaged inside the screw cap C. Also, the female screw portion 50 of the screw cylinder portion 44 of the screw cap C meshes and screws with the male screw portion 25 of the screw wall portion 9 of the middle plug B and is set. Thus, when setting the screw cap C on the middle plug B, the transfer plug cap of this embodiment can mount the screw cap C on the middle plug B by caulking. Therefore, unlike the conventional transfer plug cap, it is not necessary to use a ratchet mechanism and rotate the screw cap C for screwing, and the set of the screw cap C and the middle plug B can be completed in one touch.

[0030] The set transfer plug cap is mounted on the mouth portion 1 of the container body A filled with the contents by caulking the mounting portion 5 of the middle plug B. When plugging the transfer plug cap set on the mouth 1 of the container body A, first, while covering the inner plug B from above the mouth 1 and pushing it in, as shown in Fig. 6(a), any one of the guide ribs 37 formed on the entire circumference of the lower end of the inner circumference of the outer cylinder 6 of the mounting part 5 is between any of the locking ribs 3 on the outer circumference of the locking projection 2 of the mouth 1 (in this embodiment, one guide rib 37 at 36° intervals is at a ratio of one in six places between the locking ribs 3 at 6° intervals), and the inner plug B descends onto the mouth 1 of the container body A while meshing. During the descent, even if the positions of the guide rib 37 and the locking rib 3 are displaced, since it abuts against the R-shaped upper end 3r of the locking rib 3 from the inclined surface 37a at the lower end of the guide rib 37, as the descent progresses, they gradually come into mesh, and due to the inclined surface 37a of the guide rib 37 and the R shape of the upper end 3r, while slightly rotating the set transfer plug cap, the guide rib 37 is meshed between any of the locking ribs 3.

[0031] As the descent of the set transfer plug cap progresses, it is aligned by the meshing of the guide rib 37 and the locking rib 3. Next, the upper end of the locking rib 3 abuts against the lower part of the locking projection 30 of the outer cylinder 6, and while slightly expanding the outer cylinder 6, it climbs over the locking projection 30. Furthermore, as the descent of the transfer plug cap progresses, the locking rib 3 climbs over the locking projection 30, the deformation of the outer cylinder 6 returns to its original state, and as shown in Figs. 1 and 6(b), any one of the locking ribs 3 meshes with the engaging rib 36 (in this embodiment, one engaging rib 36 at 18° intervals is at a ratio of one in three places between the locking ribs 3 at 6° intervals). At the same time, the locking rib 3 fits into the locking recess 31 of the outer cylinder 6, the upper end surface of the mouth 1 abuts against the lower surface of the upper wall 8, the lower part of the locking projection 2 of the mouth 1 engages with the upper part of the locking projection 30 of the outer cylinder 6, and the set transfer plug cap is mounted on the container body A so as not to come off, and the plugging is completed.

[0032] After plugging, since the locking rib 3 meshes and fits with the inside of the locking recess 31 and the engaging rib 36, even if the screw cap C is rotated with respect to the container body A when opening the lid, the inner plug B will not rotate together with the screw cap C, and the torque for rotating the screw cap C can be transmitted to the inner plug B without waste. Further, since the locking rib 3 has an R-shaped upper end 3r and a vertical rib shape for the portion other than the upper end 3r, the engagement of the engaging rib 36 with the locking rib 3 is better than the case where the locking rib 3 is inclined from top to bottom, because the vertical portion is longer. Although not shown, in order to prevent unauthorized opening before use after the transition plug cap is capped on the container body A, a shrink label, a sealing member, or the like may be provided between the screw cap C and the middle plug B.

[0033] As shown in FIGS. 1, 2(b), and 6(b), the transition plug cap of the present embodiment is aligned by the engagement of the guide rib 37 and the locking rib 3, and then the locking projection 30 is overcome, and the locking rib 3 and the engaging rib 36 are engaged, so that the engagement between the locking rib 3 and the engaging rib 36 does not shift. Further, since the transition plug cap is made of a softer material than the container body A, the engaging rib 36 of the middle plug B is more likely to be damaged than the locking rib 3 of the container body A. However, since the guide rib 37 is disposed at a position where it is displaced by 6° with respect to the engaging rib 36 and does not overlap when viewed from above, for example, even if the guide rib 37 is damaged by contact with the locking rib 3, the engaging rib 36 engages with the gap between the locking ribs 3 at a position different from the damaged guide rib 37, so that the engaging rib 36 can be surely engaged without worrying about damage or deformation of the guide rib 37.

[0034] Next, in order to use the container with the transition plug cap of the present embodiment, first, the screw cap C is rotated in the opening direction with respect to the middle plug B. By the rotation of the screw cap C, the fitting convex portion 49 of the sealing cylinder portion 43 rotates, and the fitting concave portion 20 of the transition plug body 13 of the middle plug B that fits with the fitting convex portion 49 also rotates around the columnar projection 16. Since the transition plug body 13 is rotated with respect to the middle plug B, the thin weakened portion 12 that connects the transition plug body 13 and the lower end of the inner periphery of the pouring cylinder 11 is broken.

[0035] When the screw cap C is rotated in the opening direction, the female screw portion 50 of the screw cap C and the male screw portion 25 of the middle plug B are screwed off, and the screw cap C is lifted with respect to the middle plug B. Also, at the initial stage of rotation, the tip of the vibrating piece 53 of the sound - emitting member 45 of the screw cap C abuts against the sound - emitting protrusion 28 on the top wall 10 of the inner stopper B. As the rotation progresses, the vibrating piece 53 advances while being curved and deformed. The tip of the vibrating piece 53 gets over the sound - emitting protrusion 28, and the curved and deformed vibrating piece 53 restores and vibrates, emitting a sound.

[0036] As the rotation of the screw cap C progresses, due to the rotational force and the pulling - up force applied to the transfer plug body 13, finally the thin - wall weakened portion 12 is completely broken, and the pouring outlet opens in the pouring cylinder 11. The transfer plug body 13 separated from the pouring cylinder 11 is pulled up by the second engaging protrusion 48 of the sealing cylinder portion 43 that engages with the first engaging protrusion 19 of the peripheral edge portion 14, and rises together with the screw cap C. Furthermore, if the female screw portion 50 is screwed out from the male screw portion 25 to detach the screw cap C from the inner stopper B, the transfer plug body 13 is also detached together with the screw cap C, and the container with the opened pouring outlet can be used.

[0037] After pouring out the contents, by rotating the screw cap C in the closing direction and screwing it onto the inner stopper B, the seal portion 47 of the sealing cylinder portion 43 of the screw cap C closely adheres to the inner circumference of the pouring cylinder 11, and the inside of the container can be sealed. When the closing of the screw cap C is completed, again, the tip of the vibrating piece 53 of the sound - emitting member 45 abuts against the sound - emitting protrusion 28 and vibrates, emitting a sound. Therefore, the user can sensually know the completion of the closing of the screw cap C. Also, the lower end surface of the screw cylinder portion 44 of the screw cap C abuts against the upper surface of the upper wall 8 of the inner stopper B, the descent is stopped, and the closing ends. Thus, the completion time of the closing of the screw cap C can be known.

[0038] At the time of closing, the outer circumference of the lower end of the transfer plug body 13 engaged inside the screw cap C approaches the pouring outlet opened in the pouring cylinder 11 of the inner stopper B and blocks the flow of the contents. Therefore, even if the container is tilted, only the contents adhere to the lower surface of the transfer plug body 13, and they can be easily recovered into the container body A. The lower surface of the top wall 40 of the screw cap C and the area above the pouring outlet in the pouring cylinder 11 are not soiled, and the contents do not accumulate, and the inside of the pouring cylinder 11 can be kept clean.

[0039] After using the contents, by pulling the gripping portion 34 and breaking the separation mechanism F, the inner stopper B can be lifted upward from the container body A and easily separated and discarded.

Industrial Applicability

[0040] The transfer plug cap of the present invention is a transfer plug cap that is attached to the mouth portion of a container body by screwing. After setting the screw cap onto the inner stopper as a transfer plug cap by screwing and attaching the transfer plug cap to the mouth portion of the container body by screwing, when opening, when the screw cap is rotated with respect to the container body, the inner stopper does not rotate around, and the screw cap can be surely rotated with respect to the inner stopper to open. Therefore, it is suitable as a transfer plug cap that can be widely used for containers for food and drinks, seasonings, etc.

Explanation of Reference Numerals

[0041] A Container body B Inner stopper C Screw cap F Separation mechanism α, β Thread height γ Engagement L Height 1 Mouth portion 2 Locking protrusion 3 Locking rib 3a Central rib 3b Both-side rib 3c Locking rib group 3d Space portion 3r Upper end portion 5 Mounting portion 6 Outer cylinder 7 Inner cylinder 8 Upper wall 9 Threaded wall portion 10 Top wall 11 Pouring cylinder 12 Thin-wall weakening portion 13 Transfer plug body 14 Peripheral edge portion 15 Cylindrical wall 16 Columnar protrusion 17 Central bottom wall 18 Annular concave groove 19 First engaging projection (first engaging portion) 20 Fitting recess (first fitting portion) 21 Cutout portion 25 Male screw portion (first screw portion) 25a Inclined upper surface 25b Flat lower surface 26 Reinforcing rib 27 Step portion 28 Sound - emitting projection 30 Locking projection 31 Locking recess 32 Notch recess 33 Slit 34 Gripping portion 35 Vertical cutting portion 36 Engaging rib 37 Guide rib 37a Inclined surface 40 Top wall 41 Outer peripheral wall 43 Sealing cylinder portion 44 Screw cylinder portion 45 Sound - emitting member 47 Sealing portion 48 Second engaging projection (second engaging portion) 49 Fitting projection (second fitting portion) 50 Female screw portion (second screw portion) 50a Flat upper surface 50b Inclined lower surface 52 Base portion 53 Vibration piece

Claims

1. A transfer plug cap comprising an inner plug having a transfer plug body that is attached to the mouth of the container body by screwing and can be opened and transferred to the screw cap by rotating the screw cap, and a screw cap that is screwed onto the inner plug and detachably attached thereto, The container body includes a locking ridge provided around the outer periphery of the mouth portion to prevent the inner plug from coming off, and a plurality of locking ribs protruding from the outer periphery of the locking ridge, The inner plug includes an outer cylinder on the outer peripheral side into which the mouth of the container body is inserted, a locking protrusion protruding from the lower part of the inner periphery of the outer cylinder and engaging with the lower part of the locking ridge, a plurality of engaging ribs protruding from the inner periphery above the locking protrusion and engaging with the locking ribs during attachment, and a plurality of guide ribs protruding from the lower part of the locking protrusion toward the lower end of the inner periphery of the outer cylinder and guiding the locking ribs during screwing. The transfer plug cap is characterized by this.

2. The transfer plug cap according to claim 1, wherein the guide ribs protrude from a position shifted so as not to overlap the engaging ribs.

3. The transfer plug cap according to claim 1 or 2, wherein the locking ribs protrude in a vertical rib shape along the axial direction from the outer periphery of the locking ridge, and the upper end portion has an R shape.

4. The transfer plug cap according to claim 1 or 2, wherein the guide ribs are provided with an inclined surface formed at the lower end.

5. The transfer plug cap according to claim 3, wherein the guide ribs are provided with an inclined surface formed at the lower end.

Images