Transition plug cap

Abstract

To provide a transition plug cap that comprises a cap body having a transition plug body and a cap threadedly engaged with the cap body and that can open the transition plug body in whichever direction the screw cap is rotated.SOLUTION: A transition plug cap comprises a cap body B which is mounted on a mouth part 1 of a container body A, and a screw cap C which is threadedly engaged with the cap body B. The cap body B comprises a mount part 4, a screw wall part 8, a pour-out cylinder 10, a transition plug body 12 connected to an inner peripheral side of the pour-out cylinder 10 through a thin weakened part 11, and a first screw part 26 threadedly engaged with the outer periphery of the screw wall part 8. The screw cap C comprises a top wall 40, a sealing cylinder part 43 which can hermetically seals the pour-out cylinder 10 and also engage the transition plug body 12, a screw cylinder part 44 which is drooped from the top wall 40, and a second screw part 55 which is threadedly engaged with the inner periphery of the screw cylinder part 44, and engages with the first screw part 26. The screw cylinder part 44 comprises a plurality of vertical ribs 56 extending axially along the outer peripheral surface.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a transition stopper cap having a cap body with a transition stopper body, and more particularly to a transition stopper cap that can be opened by rotating a screw cap in either the opening or closing direction. [Background technology]

[0002] A transition stopper cap has been known as a food container for storing contents such as dressing, in which the inside of the container body is sealed by a cap body having a transition stopper body until it is opened, and the transition stopper body can be removed from the cap body by rotating a screw cap that is screwed onto the cap body in the opening direction, allowing the transition stopper body to be held in the attachment portion of the screw cap and opened (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-11921 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the transition stopper cap described in Patent Document 1 above can be opened with a reduced opening torque by simply rotating the screw cap in the opening direction without increasing the stress on the thin-walled weakened portion.However, there were previously transition stopper caps that required the screw cap to be rotated in the closing direction once to open, so there was a demand for a transition stopper cap that could be opened by rotating the screw cap in the closing direction as in the past.

[0005] The present invention has an objective of solving the above-mentioned problems and provides a transition stopper cap that includes a cap body having a transition stopper body and a screw cap that is screwed onto the cap body, in which the transition stopper body can be opened by rotating the screw cap in either direction. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention provides a transition stop cap, comprising a cap body which is attached to the mouth of a container body and has a transition stop body, and a screw cap which is screwed onto the cap body so as to be detachably attached, the cap body comprising an attachment portion which is attached to the mouth of the container body, a threaded wall portion which stands up from the attachment portion, a pouring tube which stands up from the inside of the threaded wall portion, a transition stop body which is connected to the inner periphery of the pouring tube via a thin-walled weakened portion, and a first threaded portion which is screwed onto the outer periphery of the threaded wall portion, and the screw cap comprises a top wall and a threaded portion which hangs down from the top wall. The screw cap has a sealing tube portion that seals the pouring tube and is engageable with the transition stopper body, a threaded tube portion that hangs down from the top wall, and a second threaded portion that is screwed onto the inner circumference of the threaded tube portion and screws into the first threaded portion, the threaded tube portion has a plurality of vertical ribs extending in the axial direction along its outer peripheral surface, and the screw cap is attached to the cap body by plugging, and when opened, the thin-walled weakened portion breaks regardless of whether the screw cap is rotated in the opening or closing direction, and the transition stopper body is transferred from the cap body to the screw cap.

[0007] In one embodiment of the transition plug cap, a vertical rib is formed to avoid the start and end points of the second threaded portion of the threaded tubular portion, and the first and second threaded portions have a smaller thread engagement than conventional screw portions, and when the screw cap is opened and rotated in the closing direction, the threads of the second threaded portion of the threaded tubular portion ride over the threads of the first threaded portion of the threaded wall portion, and the threaded tubular portion has a lower end surface formed flush with the lower end surface of the vertical rib. Effect of the Invention

[0008] By adopting the above-mentioned configuration, the transition plug cap of the present invention can reliably break the thin-walled weakened portion regardless of whether the screw cap of the transition plug cap is rotated in the opening or closing direction, thereby removing the transition plug body from the cap body and transferring it to the screw cap. [Brief description of the drawings]

[0009] [Figure 1] 1A and 1B are diagrams showing the state after the screw cap and the cap body in the transition plug cap according to an embodiment of the present invention have been set, in which (a) is a side cross-sectional view, and (b) is a cross-sectional view taken along line XX in (a). [Diagram 2] 1A and 1B are diagrams showing a cap body of an embodiment, in which (a) is a top view and (b) is a partial cross-sectional side view. [Diagram 3] 1A and 1B are diagrams showing a screw cap according to an embodiment, in which (a) is a side cross-sectional view and (b) is a bottom view. [Figure 4] 1(a) is an enlarged view of the main part of the screw-on portion of the transition plug cap according to the embodiment of the present invention, where (a) is a view when screwed and closed, and (b) is a view when screwed and opened. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Next, the transfer plug cap of the present invention will be described with reference to the drawings by way of examples. In the following description, with respect to FIG. 1(a), the up-down direction is referred to as the "axial direction", the up direction is referred to as the "upper", the down direction is referred to as the "lower", and the left-right direction is referred to as the "radial direction".

[0011] (Example) In FIG. 1, A is a container body, B is a cap body attached to the container body A, and C is a screw cap that is screwed onto the cap body B and detachably attached. The container body A is made of a hard material with shape retention such as glass or PET, the cap body B is made of a soft material such as PE, and the screw cap C is made of a material such as PP that is harder than the cap body B. The materials of the container body A, the cap body B, and the screw cap C can be changed as appropriate. The container body A has a mouth portion 1 and a locking protrusion 2 for fitting the cap body B and holding it in place to prevent it from coming off.

[0012] As shown in Figures 1 and 2, the cap body B consists of an outer tube 5 on the outer periphery, an inner tube 6 on the inner periphery, and an upper wall 7 located on the top surface side of the mouth portion 1, and is also composed of an attachment portion 4 forming an annular groove into which the mouth portion 1 of the container body A fits, a threaded wall portion 8 standing upright from the attachment portion 4, a top wall 9 extending inward from the inner upper end of the threaded wall portion 8, and a pouring tube 10 standing upright from the upper surface of the top wall 9.

[0013] The pouring tube 10 serves as a pouring outlet that guides the contents stored in the container body A along its inner circumference and pours them out from the tip, and a transition stopper body 12 is integrally connected to the lower end of the inner circumference via a thin-walled weakened portion 11 formed around the entire circumference.

[0014] The transition plug body 12 comprises a ring-shaped peripheral portion 13 connected to the inner circumference of the thin-walled weakened portion 11, a cylindrical wall 14 formed inside the peripheral portion 13, and a circular central bottom wall 16 that seals the inner circumference side of the lower end of the cylindrical wall 14 and has a columnar protrusion 15 erected in the center.

[0015] The peripheral portion 13 has an annular groove 17 recessed from the underside to a predetermined height, and a first engagement protrusion 18 constituting a first engagement portion is provided around the lower outer periphery. At the upper outer periphery, mating recesses 19 are cut out from the outer periphery at positions 0° and 180° relative to the axis and constituting the first engagement portion that engages with a second engagement portion arranged on the screw cap C described later, and between the mating recesses 19, hollowed-out portions 20 formed in an arc shape along the cylindrical wall 14 are recessed from the top surface. In this embodiment, the first fitting portion is embodied as a fitting recess 19 at positions 0° and 180° relative to the axis of the upper outer periphery of the transition plug body 12, but the number and structure of the first fitting portion are not important as long as it has recesses and protrusions in the circumferential direction of the transition plug body 12 that fit with the second fitting portion of the screw cap C.

[0016] The threaded wall portion 8 has a male threaded portion 26 that constitutes the first threaded portion screwed onto its outer peripheral surface, and a plurality of reinforcing ribs 27 that are connected at their upper parts to the top wall 9 and extend in the axial direction are arranged on its inner peripheral surface. As shown in Figures 1, 2 and 4(a), male thread portion 26 is not symmetrical in cross section from top to bottom like a normal screw thread, but is composed of an inclined upper surface 26a formed with a steeply inclined upper surface, a flat lower surface 26b formed with a flat lower surface, and a vertical outer surface 26c formed between inclined upper surface 26a and flat lower surface 26b, and the upper end is formed with a double thread starting at 180° intervals, and the thread height α of male thread portion 26 is formed lower than the height of a normal thread. In this embodiment, the male thread portion 26 is a double-start thread, but depending on the height of the threaded wall portion 8, it may be a multiple-start thread having three or more starts.

[0017] As shown in Figs. 1 and 2, the top wall 9 is provided on its peripheral edge with a stepped portion 28 that is recessed toward the outer periphery, and a sound-producing protrusion 29 is disposed on the inner periphery of the stepped portion 28.

[0018] The outer tube 5 has an inner circumference with a locking reduced diameter portion 31 that engages with the locking protrusion 2 of the container body A to prevent the mouth portion 1 from coming off, and a notched recess 32 is recessed radially from the outer circumferential surface around the circumferential direction, and a separation mechanism F is provided below the notched recess 32 to separate the cap body B from the container body A so that it can be disposed of separately. The sorting mechanism F has a gripping portion 34 provided via a slit 33 formed in the axial direction over a specified arc range on the lower outer peripheral surface of the outer tube 5, and the gripping portion 34 is separated from the outer tube 5 by a thin-walled vertical cut portion 35 so as to be able to be deployed outward. Furthermore, the notched recess 32 can be easily broken, making it easy to remove the cap body B from the container body A.

[0019] As shown in Figures 1 and 3, screw cap C has a disk-shaped top wall 40 and an outer peripheral wall 41 extending vertically from the outer edge of top wall 40. A sealing cylinder portion 43 and a threaded cylinder portion 44 are extended vertically from the inside on the inner surface of top wall 40 in a concentric manner. Furthermore, a sound-producing member 45 is disposed between the sealing cylinder portion 43 and the threaded cylinder portion 44 at a position where it engages with the sound-producing protrusion 29 on the top wall 9 of cap body B.

[0020] The sealing tube portion 43 is provided on its outer periphery with a seal portion 47 which abuts against the inner surface of the pouring tube 10 to seal the pouring outlet when the screw cap C is attached to the cap body B, and is provided with a second engagement protrusion 48 at the lower end of the inner periphery which constitutes a second engagement portion that fits over the first engagement protrusion 18 of the peripheral portion 13 of the transition stopper body 12, and is provided with the same number of engagement protrusions 51 as the engagement recesses 19 at the upper part of the inner periphery which protrude radially inward and constitute a second engagement portion that fits from above into the engagement recesses 19 of the transition stopper body 12.

[0021] The threaded tube portion 44 has a female threaded portion 55 screwed into its inner circumference, which constitutes a second threaded portion that screws into the male threaded portion 26 of the cap body B, and vertical ribs 56 protruding from the outer circumference at four positions, 0°, 90°, 180°, and 270° relative to the axis, extend in the axial direction from the upper end to the lower end with a predetermined width. The female thread portion 55 is formed with a shape and number of threads to screw into the male thread portion 26, and may each be provided with intermittent protruding threads. The vertical ribs 56 are formed to avoid the start and end points of each thread (thread) of the female thread portion 55, and the wall thickness of the entire threaded tube portion 44 is a thick-walled portion 44a where the vertical ribs 56 protrude, which is thicker by the amount of the vertical ribs 56, and the other portions are thin-walled portions 44b. In this embodiment, vertical ribs 56 are protruded at four positions, namely, 0°, 90°, 180°, and 270° relative to the axis of the outer periphery of the threaded tube portion 44. However, it is sufficient that the wall thickness of the entire threaded tube portion 44 is formed with thick-walled portions 44a that are thicker by the amount of the vertical ribs 56 and other thin-walled portions 44b. Therefore, the number and structure of the vertical ribs 56 are not important as long as multiple vertical ribs 56 are arranged circumferentially at intervals to form thick-walled portions 44a and the remaining spaces form thin-walled portions 44b.

[0022] As shown in Figures 1, 3 and 4(a), the female thread portion 55 is not symmetrical in cross section from top to bottom like a normal screw thread, but is composed of a flat upper surface 55a which is formed with a flat upper surface, an inclined lower surface 55b which is formed with a steeply inclined lower surface, and a vertical inner surface 55c which is formed between the flat upper surface 55a and the inclined lower surface 55b. The female thread portion 55 is formed with a shape and number of threads which screw into the male thread portion 26, and the thread height β of the female thread portion 55 is formed lower than the normal thread height, like the male thread portion 26. Furthermore, when the male thread portion 26 and the female thread portion 55 are screwed together, the engagement γ between the tips of the threads is set smaller than in the past.

[0023] As shown in Figures 1 and 3, the sound-producing member 45 is composed of a rigid plate-like base 57 suspended from the underside of the top wall 40 between the threaded tube portion 44 and the sealed tube portion 43, and a rod-shaped vibrating piece 58 suspended from the base 57 and formed to be elastically deformable. The sound-producing member 45 is set so that just before the screw cap C is completely tightened, the tip of the vibrating arm 58 comes into contact with the sound-producing protrusion 29 of the cap body B, and the tightening proceeds while bending and deforming the vibrating arm 58, and at the same time as the tightening is completed, the vibrating arm 58 overcomes the sound-producing protrusion 29 and tries to return to its original shape, thereby vibrating and generating sound.

[0024] Next, the manner of use and the effects of this embodiment will be described. In this embodiment, the transition stopper cap is made by molding the cap body B and the screw cap C separately, and then the screw cap C is attached to the top of the cap body B to set it as the transition stopper cap, and then the attachment portion 4 of the cap body B is placed against the mouth portion 1 of the container body A and the transition stopper cap is attached.

[0025] When setting the screw cap C on the cap body B, first, align and fit the fitting protrusions 51 inside the sealing tube portion 43 of the screw cap C from above each fitting recess 19 on the peripheral portion 13 of the transition stopper body 12 of the cap body B, and then push the screw cap C into the cap body B.

[0026] From this state, when the screw cap C is pushed into the cap body B, the lowermost inclined lower surface 55b of the female threaded portion 55 of the screw tube portion 44 of the screw cap C abuts against the uppermost inclined upper surface 26a of the male threaded portion 26 of the threaded wall portion 8 of the cap body B, and rides up and over it. At this time, the wall thickness of the screw tube portion 44 is easily deformed because it has a thick-walled portion 44a where the vertical ribs 56 are located and a thin-walled portion 44b between them, and the screw cap C is pushed in as the screw tube portion 44 is pushed outward.

[0027] As the screw cap C is further pressed in, the female threaded portion 55 and the male threaded portion 26 mesh over their entire range, the screw tube portion 44 is released from being pushed outward and returns to its original shape, and the second engagement protrusion 48 of the sealing tube portion 43 overcomes the first engagement protrusion 18 formed on the peripheral portion 13 of the transition plug body 12 of the cap body B and engages with it, thereby completing the pressing-in. At the same time, as shown in Figures 1 and 4(a), the lower end surface of the screw tube portion 44 of the screw cap C lightly abuts against the upper surface of the upper wall 7 of the cap body B or is close to it with a small gap, completing the setting as a transition plug cap.

[0028] After the transition stopper cap is set, the respective mating protrusions 51 on the inside of the sealing cylindrical portion 43 of the screw cap C fit into the respective mating recesses 19 on the peripheral portion 13 of the transition stopper body 12 of the cap body B, and further, the second engagement protrusion 48 of the sealing cylindrical portion 43 fits into the first engagement protrusion 18 formed on the peripheral portion 13 of the transition stopper body 12 of the cap body B, thereby engaging the transition stopper body 12 inside the screw cap C. Further, the female thread portion 55 of the threaded cylindrical portion 44 of the screw cap C is meshed with the male thread portion 26 of the threaded wall portion 8 of the cap body B and screwed into place. In this way, when setting the screw cap C to the cap body B, the transition stopper cap of this embodiment can be attached to the cap body B by tapping, so there is no need to use a ratchet mechanism as in conventional transition stopper caps to rotate and screw the screw cap C, and the setting of the screw cap C and the cap body B can be completed with a single touch.

[0029] The transfer plug cap thus set is plugged by placing the mounting portion 4 of the cap body B on the mouth portion 1 of the container body A filled with the contents, and is then ready for use. When the cap body B is attached to the container body A, the cap body B is attached so as not to come off the container body A while deforming and restoring. In order to prevent unauthorized opening of the transfer stopper cap before use after it is sealed into the container body A, a shrink label or sealing member, etc., may be provided between the screw cap C and the cap body B, although this is not shown.

[0030] Next, when using a container equipped with the transition plug cap of this embodiment, the screw cap C is usually first rotated relative to the cap body B in the opening direction. By rotating the screw cap C, the fitting protrusion 51 of the sealing cylinder portion 43 rotates, and the fitting recess 19 of the transition stopper body 12 of the cap body B, which fits with the fitting protrusion 51, also rotates about the columnar protrusion 15. As the transition stopper body 12 is rotated relative to the cap body B, the thin-walled weakened portion 11 connecting the transition stopper body 12 and the lower end of the inner circumference of the pouring cylinder 10 is broken.

[0031] When the screw cap C is rotated in the opening direction, the female thread portion 55 of the screw cap C and the male thread portion 26 of the cap body B are unscrewed, and the screw cap C is lifted up relative to the cap body B. Also, at the beginning of the rotation, the tip of the vibrating bar 58 of the sound-producing member 45 of the screw cap C abuts against the sound-producing protrusion 29 on the top wall 9 of the cap body B, and as the rotation progresses, the vibrating bar 58 moves while bending and deforming, the tip of the vibrating bar 58 overcomes the sound-producing protrusion 29, the bent and deformed vibrating bar 58 returns to its original shape and vibrates, producing sound.

[0032] As the rotation of the screw cap C continues, the rotational force and pulling force applied to the transition stopper body 12 eventually cause the thin-walled weakened portion 11 to completely break, opening an outlet inside the pouring tube 10, and the transition stopper body 12, separated from the pouring tube 10, is pulled up by the second engaging protrusion 48 of the sealing tube portion 43 which engages with the first engaging protrusion 18 of the peripheral portion 13, and rises together with the screw cap C. Furthermore, when the female thread portion 55 is unscrewed from the male thread portion 26 to separate the screw cap C from the cap body B, the transition plug 12 is also separated together with the screw cap C.

[0033] As described above, when using the container, normally the screw cap C is first rotated in the opening direction relative to the cap body B. However, in the transition stopper cap of this embodiment, even if it is rotated in the closing direction, the thin-walled weakened portion 11 between the transition stopper body 12 and the cap body B can be broken and the pouring outlet can be opened in the pouring tube 10, as will be explained below.

[0034] First, when the screw cap C is rotated in the closing direction, the thick-walled portion 44a formed by the vertical ribs 56 arranged on the outer periphery of the screw tube portion 44 increases in contact resistance with the upper wall 7 (after the feeling of completion of tightening), and then the mating protrusion 51 of the sealing tube portion 43 rotates, and the mating recess 19 of the transition stopper body 12 of the cap body B, which fits with the mating protrusion 51, also rotates around the columnar protrusion 15, causing the transition stopper body 12 to rotate relative to the cap body B, and the thin-walled weakened portion 11 connecting the transition stopper body 12 and the lower end of the inner periphery of the pouring tube 10 is broken. The thick-walled portion 44a of the screw tube portion 44 is formed by vertical ribs 56 arranged on the outer periphery, which acts as a pillar that does not deform, preventing the screw tube portion 44 from deforming in the axial direction. When the lower end face of the screw tube portion 44 abuts against the upper surface of the upper wall 7 of the cap body B, the screw cap C is stopped from descending relative to the cap body B.

[0035] Furthermore, when rotated in the closing direction, the engagement γ between the flat upper surface 55a of the female threaded portion 55 of the threaded cylindrical portion 44 of the screw cap C and the flat lower surface 26b of the male threaded portion 26 of the threaded wall portion 8 of the cap body B is small, and as the screw is rotated, the threads of the female threaded portion 55 ride up onto the threads of the male threaded portion 26, and the thin-walled portion 44b of the threaded cylindrical portion 44 spreads the threaded cylindrical portion 44 radially. As shown in Figure 4(b), the inner surface 55c of the female threaded portion 55 abuts against the outer surface 26c of the male threaded portion 26, and the male threaded portion 26 and the female threaded portion 55 are unscrewed.

[0036] Furthermore, when rotated in the closing direction, the inclined lower surface 55b of the female threaded portion 55 abuts and rides up the inclined upper surface 26a of the male threaded portion 26, and the screw tube portion 44 is gradually released from radial expansion and pushed up while returning to its original shape, so that the screw cap C is lifted upward relative to the cap body B. Finally, the screw cap C with the transition plug 12 transferred thereto is removed from the cap body B, and the container with the open spout can be used.

[0037] After the contents are poured out, the screw cap C is rotated in the closing direction and screwed onto the cap body B, so that the seal portion 47 of the sealing tube portion 43 of the screw cap C adheres tightly to the inner circumference of the pouring tube 10 to seal the inside of the container. When the screw cap C is completely closed, the tip of the vibrating piece 58 of the sound-making member 45 again comes into contact with the sound-making protrusion 29 and vibrates, emitting a sound, so that the user can intuitively know that the screw cap C is completely closed. In addition, when the lower end surface of the screw tube portion 44 of the screw cap C abuts against the upper surface of the upper wall 7 of the cap body B, the descent is stopped and the closing of the cap is completed, so that it is possible to know when the closing of the screw cap C is completed.

[0038] When the lid is closed, the outer periphery of the lower end of the transition stopper body 12 attached to the inside of the screw cap C is close to the pouring outlet opened in the pouring tube 10 of the cap body B and blocks the flow of the contents, so that even if the container is turned over, the contents simply adhere to the underside of the transition stopper body 12 and can be easily collected into the container body A, and the underside of the top wall 40 of the screw cap C and the area above the pouring outlet in the pouring tube 10 do not get dirty or the contents accumulate, so the inside of the pouring tube 10 can be kept clean.

[0039] The transition stopper cap of this embodiment can transfer the transition stopper body 12 from the cap body B to the screw cap C, regardless of the rotation direction of the screw cap C, whether it is in the opening or closing direction, and can open the pouring outlet of the pouring tube 10 of the cap body B. In addition, by arranging a plurality of vertical ribs 56 in the axial direction at predetermined intervals along the outer peripheral surface of the screw tube portion 44, thick-walled portions 44a and thin-walled portions 44b having different wall thicknesses are formed in the screw tube portion 44. The thin-walled portions 44b allow the screw tube portion 44 to be expanded radially and deformed, ensuring that the screw cap C can be attached to the cap body B by plugging and opening by rotating in the closing direction. Furthermore, the thick-walled portions 44a accompanied by the vertical ribs 56 prevent the screw tube portion 44 from deforming in the axial direction, reliably stopping the descent of the screw tube portion 44, and making it easy to feel the completion of tightening due to the increased contact resistance during rotation. [Industrial Applicability]

[0040] The transition stopper cap of the present invention is a transition stopper cap that is attached to the mouth of a container body and comprises a cap body having a transition stopper body, and a screw cap that is screwed onto the cap body so that it can be attached and detached freely.The screw cap is attached to the cap body by plugging, and when the screw cap is rotated in either the opening or closing direction, the thin-walled weakened portion is reliably broken, the transition stopper body can be removed from the cap body and transferred to the screw cap, making it suitable as a transition stopper cap that can be widely used for containers of food, beverages, seasonings, etc. [Explanation of symbols]

[0041] A Container body B Cap body C Screw Cap F Separation mechanism α, β Thread height γ 1 Mouth 2 Locking ridges 4. Mounting part 5 Outer cylinder 6 Inner cylinder 7 Upper Wall 8 Threaded wall 9. Ceiling 10 Pour tube 11 Thin weakened part 12 Transition plug 13 Periphery 14 Cylindrical Wall 15 Columnar projection 16 Center bottom wall 17 Circular groove 18 First locking protrusion (first locking part) 19 Fitting recess (first fitting portion) 20 Cutout section 26 Male threaded portion (first threaded portion) 26a Slanted top surface 26b Flat bottom surface 26c External surface 27 Reinforcing rib 28 Step section 29 Sound output protrusion 31 Locking diameter reduction part 32 Notch recess 33 Slit 34 Gripping part 35 Vertical cut 40 Top Wall 41 Peripheral wall 43 Closed envelope section 44 Threaded barrel 44a Thick wall part 44b Thin wall part 45 Sound-producing components 47 Seal part 48 Second locking protrusion (second locking part) 51 Fitting protrusion (second fitting portion) 55 Female threaded section (second threaded section) 55a flat top surface 55b Sloped bottom surface 55c Inside 56 Vertical ribs 57 Base 58 Vibration piece

Claims

1. The container has a cap body that is attached to the mouth of the container body and has a transition plug, and a screw cap that is screwed onto the cap body so as to be detachably attached. The cap body includes an attachment portion that is attached to the mouth of the container body, a threaded wall portion that stands upright from the attachment portion, a pouring tube that stands upright from inside the threaded wall portion, a transition plug body that is connected to the inner periphery of the pouring tube via a thin-walled weakened portion, and a first threaded portion that is screwed onto the outer periphery of the threaded wall portion, The screw cap includes a top wall, a sealing tubular portion that hangs down from the top wall, seals the pouring tube, and is engageable with the transition plug, a threaded tubular portion that hangs down from the top wall, and a second threaded portion that is screwed onto an inner periphery of the threaded tubular portion and screws into the first threaded portion; The threaded cylindrical portion has a plurality of longitudinal ribs extending in the axial direction along an outer circumferential surface thereof, The screw cap is attached to the cap body by plugging, and when opened, the thin-walled weakened portion breaks regardless of whether the screw cap is rotated in the opening or closing direction, and the transition plug body moves from the cap body to the screw cap.

2. 2. The transition plug cap according to claim 1, wherein the vertical rib is formed to avoid a start point and an end point of the second threaded portion of the threaded cylindrical portion.

3. The first and second screw portions have a smaller thread engagement than conventional ones, 3. The transition plug cap according to claim 1, wherein when the screw cap is rotated in the closing direction during opening, the threads of the second threaded portion of the screw cylinder portion ride over the threads of the first threaded portion of the screw wall portion.

4. 3. The transition plug cap according to claim 1, wherein the threaded cylindrical portion has a lower end surface formed flush with a lower end surface of the vertical rib.

5. 4. The transition plug cap according to claim 3, wherein the threaded cylindrical portion has a lower end surface formed flush with a lower end surface of the vertical rib.

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