Screw cap

Abstract

To provide a screw cap allowed to maintain a horizontal state of a nozzle cap and a nozzle inside plug during temporary setting in order to prevent a TE bridge from being collapsed or broken.SOLUTION: A screw cap comprises a nozzle inside plug B that has a nozzle part 13 and is to be mounted on a container body A and a nozzle cap C that has a TE ring D provided continuous with a lower end through a breakable TE bridge 41 and screwed to the nozzle part. The nozzle part has a cap screwing portion 19, a TE ring fitting portion 16 formed below the cap screwing portion, and upper and lower protruding portions 22, 23 circumferentially provided in the TE ring fitting portion. The nozzle cap has an outer peripheral wall 31 that the inner peripheral surface 31a corresponds to the cap screwing portion, and upper and lower undercut portions 45, 46 that are provided protruding from an inner periphery of the TE ring and, in lid closure, engaged with upper and lower protruding portions. The nozzle cap is temporarily set onto the nozzle inside plug with the upper protruding portion abutted against the lower undercut portion.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a screw cap, and more particularly to a screw cap with a TE ring that allows confirmation of the opened state. [Background technology]

[0002] Conventionally, screw caps have been known as caps for containers that hold contents such as food and beverages, and include a cap body having a nozzle portion and attached to the container body, a lid cap that is attached by screwing onto the nozzle portion, and a TE (tamper evident) ring connected to the lower end of the lid cap via a breakable weakened piece, and when the lid cap is opened, the TE ring is detached from the lid cap, allowing the opened state to be confirmed (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-097585 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the screw cap described in Patent Document 1, the positioning protrusion of the cap body (nozzle inner plug) is aligned with the positioning recess of the TE ring, the lid cap (nozzle cap) is placed on the cap body, and the male threaded portion of the cap body is brought into contact with the female threaded portion of the lid cap to temporarily set it, and then the lid cap is screwed onto the cap body.This means that the lid cap is likely to become tilted relative to the cap body, which can cause the weakened piece (TE bridge) to be crushed or broken when screwed on.

[0005] The present invention aims to solve the above problem and to provide a screw cap that can maintain the horizontal position of the nozzle cap and nozzle plug when temporarily set in order to prevent the TE bridge from being crushed or broken. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the present invention provides a screw cap comprising: a nozzle stopper having a nozzle portion and attached to a container body; and a nozzle cap having a TE ring connected to its lower end via a breakable TE bridge and screwed onto the nozzle portion of the nozzle stopper; the nozzle portion of the nozzle stopper having a cap screwing portion that tapers downward, a TE ring fitting portion formed below the cap screwing portion and into which the TE ring is fitted, and upper and lower protrusions formed around the outer periphery of the TE ring fitting portion; the nozzle cap having an outer peripheral wall whose inner surface corresponds to the cap screwing portion of the nozzle portion, and upper and lower undercut portions that protrude from the inner periphery of the TE ring and engage with the upper and lower protrusions of the nozzle stopper when the lid is closed; and the nozzle cap maintains a horizontal position by abutting the upper protrusions and lower undercut portions when temporarily set on the nozzle stopper.

[0007] As an embodiment of the screw cap, the upper protrusion has an outer diameter smaller than that of the lower protrusion, and the upper undercut has an inner diameter smaller than that of the lower undercut, the TE ring has two upper and lower undercut sections that are intermittently arranged at a position spaced apart from the TE bridge, the nozzle plug has an alignment protrusion that protrudes from the TE ring fitting section, and the nozzle cap has an alignment recess on the inner circumference of the TE ring that fits into the alignment protrusion of the nozzle plug, and the nozzle cap can be fitted onto the nozzle plug immediately after molding. [Effects of the Invention]

[0008] By adopting the above-described configuration, the screw cap of the present invention can prevent the TE bridge connecting the lower end of the nozzle cap and the TE ring from being crushed or broken when the nozzle cap with a TE ring is fitted onto the nozzle portion of the nozzle plug. Furthermore, the screw cap of the present invention can prevent the TE bridge from being crushed or broken even when the nozzle cap with the TE ring is attached to the nozzle inner plug by plugging immediately after molding. [Brief explanation of the drawings]

[0009] [Figure 1] 2A and 2B are diagrams showing a state after a screw cap according to an embodiment of the present invention has been set on a container body, in which (a) is a half cross-sectional side view, and (b) is a cross-sectional view taken along line XX in (a). [Figure 2] 1(a) is an enlarged view of the essential part of FIG. 1(b), and FIG. 1(b) is an enlarged view of the essential part of FIG. 1(a) at the cross section of line YY in FIG. 1(a). [Figure 3] 1A and 1B are diagrams showing a nozzle inner plug constituting a screw cap according to an embodiment of the present invention, in which (a) is a top view of the main part, and (b) is a half-sectional side view. [Figure 4] 1A and 1B are diagrams showing a nozzle cap constituting a screw cap according to an embodiment of the present invention, in which (a) is a side cross-sectional view, (b) is a bottom view, and (c) is a cross-sectional view taken along line ZZ in (a). [Figure 5] 1A and 1B are diagrams showing the state in which the nozzle cap constituting the screw cap according to an embodiment of the present invention is aligned with the nozzle inner plug and set from above, where (a) is a side cross-sectional view and (b) is an enlarged view of the main part of (a). DETAILED DESCRIPTION OF THE INVENTION

[0010] Next, the screw cap of the present invention will be described with reference to the drawings showing an embodiment thereof. In the following description, when viewed in Figure 1(a), the upward direction is referred to as "upward", the downward direction is referred to as "downward", the left-right direction is referred to as "radial direction", and when viewed in Figure 1(b), the right side is referred to as "0°" and the left side is referred to as "180°".

[0011] (Example) In Figure 1, A is a container body that contains the contents, B is a nozzle plug that has a nozzle portion 13 and is attached to the container body A, C is a nozzle cap that has a TE ring D that is rupturably connected to the lower end and is screwed onto the nozzle portion 13 of the nozzle plug B, and the screw cap comprises the nozzle plug B and the nozzle cap C with a TE ring.

[0012] As shown in FIG. 1, the container body A has a mouth portion 1 to which a nozzle plug B is attached, and a body portion 2 with a bottom. The mouth 1 is formed with a ring-shaped partition wall 3 connected to the upper end of the inner periphery and a tight fitting tube 4 erected on the inner edge of the partition wall 3, and a male screw 5 is threaded on the outer periphery.

[0013] As shown in Figures 1 to 3, the nozzle plug B comprises an outer tube 10 attached to the outer periphery of the mouth 1 of the container body A, a ring-shaped upper wall 11 connected inward from the upper end of the inner periphery of the outer tube 10 and closing the mouth 1, an inner tube 12 hanging down from the underside of the upper wall 11 and whose outer periphery is inserted into the inner periphery of the tight-fitting tube 4, and a nozzle portion 13 extending upward from the inner edge of the upper wall 11 at an angle tapering toward the tip and having a nozzle cap C screwed onto its outer periphery from above to close the nozzle portion. The outer cylinder 10 has an internal thread 14 formed on its inner periphery, which threads with the external thread 5 of the mouth portion 1 .

[0014] The nozzle portion 13 comprises a TE ring fitting portion 16 that stands upward from the inner edge of the upper wall 11 and has a vertically formed outer periphery, a ring-shaped stepped upper wall 17 that extends inward from the upper end of the TE ring fitting portion 16, an inclined cylindrical portion 18 that extends upward from the inner edge of the stepped upper wall 17 at a tapered angle and whose upper end of the inner periphery forms a nozzle opening 18a, and a cap screwing portion 19 that is formed in the middle of the outer periphery of the inclined cylindrical portion 18 and into which a nozzle cap C is screwed.

[0015] As shown in Figure 3, the TE ring fitting portion 16 has alignment protrusions 21 protruding radially at a predetermined height from the upper surface of the upper wall 11 at diagonal positions of 0° and 180° on the outer periphery, and an upper protrusion 22 on top and a lower protrusion 23 formed a predetermined height below the upper protrusion 22 are provided around the entire circumference excluding the alignment protrusions 21. As shown in FIG. 2( b ), the outer diameter of the lower protrusion 23 is larger than the outer diameter of the upper protrusion 22 .

[0016] A stopper receiving portion 25 is provided on the inner edge of the upper surface of the upper step wall 17 to engage with the inside of the nozzle cap C when the lid is closed to stop rotation and to align the position.

[0017] The outer periphery of the cap screwing portion 19 is inclined at an angle θ (a gradient of 5° in this embodiment), and a male screw portion 27 is screwed thereon. Unlike a normal screw thread, the cross section of the male thread portion 27 is not symmetrical from top to bottom, but is formed asymmetrically with an inclined upper surface 27a formed with a steeply inclined upper surface and a flat lower surface 27b formed with a nearly flat lower surface.

[0018] As shown in Figures 1, 2 and 4, nozzle cap C comprises a disk-shaped top wall 30, and an outer peripheral wall 31 that extends downward from the outer peripheral edge of top wall 30 and inclines outward at an angle θ (a gradient of 5° in this embodiment) so that at least the inner peripheral surface 31a is parallel to the outer periphery of cap screw-on portion 19 of nozzle portion 13 of nozzle plug B, and is attached to cap screw-on portion 19 of nozzle portion 13 of nozzle plug B, and a sealing tube 32 is suspended from the underside of top wall 30, the outer periphery of which is inserted into nozzle opening 18a of nozzle portion 13 when the cap is closed.

[0019] The inner side of the lower end surface of the outer peripheral wall 31 abuts against the outer side of the upper surface of the stepped upper wall 17 of the nozzle plug B when the lid is closed, preventing the nozzle cap C from descending. A female threaded portion 34 that screws into the male threaded portion 27 of the nozzle portion 13 is threadedly provided in the middle of the inner peripheral surface 31a, and a stopper 35 is provided at the lower end of the inner peripheral surface 31a which engages with the stopper receiving portion 25 of the nozzle plug B when the lid is closed to stop rotation and align the position. Unlike a normal screw thread, the cross section of the female thread portion 34 is not symmetrical from top to bottom, but is formed asymmetrically with a flat upper surface 34a, which is formed almost flat on the top surface, and an inclined lower surface 34b, which is formed with a steep incline on the bottom surface.

[0020] As shown in Figures 1, 2 and 4, the TE ring D has a ring portion 40 that is attached to the outer periphery of the TE ring fitting portion 16 of the nozzle plug B, and on the upper surface of the ring portion 40, as shown in Figure 4(c), multiple TE bridges 41 (in this embodiment, four locations at 90° intervals at positions of 45°, 135°, 225° and 315°) are arranged and are rupturably connected to the outside of the lower end surface of the outer peripheral wall 31 of the nozzle cap C, and abutment protrusions 42 are arranged between the TE bridges 41 (four locations in this embodiment) with their upper surfaces standing with a slight gap between them and the lower end surface of the outer peripheral wall 31.

[0021] Alignment recesses 44 are recessed on the inner circumference of the ring portion 40 at diagonal positions of 0° and 180°. When the lid is closed, the alignment protrusions 21 on the outer circumference of the TE ring fitting portion 16 of the nozzle inner plug B engage inward. As shown in Figure 4(b), an interval range α (area where no TE bridge 41 or undercut portions 45, 46 is provided) is arranged at approximately 30° intervals with each alignment recess 44 and the 90° and 270° positions as the center. In addition, protrusion ranges β with an arc width of approximately 15° are arranged at eight locations at 45° intervals. Upper undercut portions 45 and lower undercut portions 46 are protruded and formed at a height that allows them to engage with the upper protrusions 22 and lower protrusions 23 on the outer circumference of the TE ring fitting portion 16, respectively, when the lid is closed. As shown in FIG. 2(b), the inner diameter of the upper undercut portion 45 is smaller than the inner diameter of the lower undercut portion .

[0022] As shown in Figure 2(b), when nozzle cap C is set on nozzle plug B and closed, at least the overlap γ between the upper protrusion 22 of the TE ring fitting portion 16 of nozzle plug B and the upper undercut portion 45 of the ring portion 40 of TE ring D is larger than the overlap δ between the upper protrusion 22 of the TE ring fitting portion 16 and the lower undercut portion 46 of the ring portion 40, and the overlap between the lower protrusion 23 of the TE ring fitting portion 16 and the lower undercut portion 46 of the ring portion 40 is approximately the same as the overlap γ. In this embodiment, the overlapping distance γ is set to 0.15 mm, and the overlapping distance δ is set to 0.05 mm. Incidentally, in conventional screw caps, the overlap between the one-step protrusion on the outer periphery of the TE ring fitting part of the nozzle inner plug and the one-step undercut part on the inner periphery of the ring part of the TE ring needed to be set to about 0.27 mm so that the TE ring would not come off after the cap was opened.

[0023] Next, the manner of use and the effects of this embodiment will be described. First, in the screw cap of this embodiment, the nozzle plug B and the nozzle cap C are molded separately, and the nozzle cap C is formed integrally with the TE ring D.

[0024] As shown in Figures 1 and 4, the integrally molded nozzle cap C of this embodiment is formed so that the inner surface 31a of the outer wall 31 of the nozzle cap C and the female thread portion 34 are inclined at an angle θ (a gradient of 5° in this embodiment). Therefore, when viewed from the underside of the TE ring D, there is no overlap between the female thread portion 34 and the inner circumference of the ring portion 40 of the TE ring D. Furthermore, the alignment recess 44 on the inner circumference of the ring portion 40 of the TE ring D does not overlap with the upper undercut portion 45 and the lower undercut portion 46. Furthermore, the upper upper undercut portion 45 is formed to protrude inward more than the lower undercut portion 46, making it easy to remove downward. Therefore, when the nozzle cap C is removed from the mold during molding, the inner circumference of the ring portion 40 of the TE ring D is not affected after the female thread portion 34 of the nozzle cap C is forcibly removed. Therefore, the TE ring D is not pulled and the TE bridge 41 is not broken.

[0025] Furthermore, the upper undercut portions 45 and lower undercut portions 46 on the inner circumference of the ring portion 40 of the TE ring D are spaced apart at a circumferential spacing range α (approximately 30°) and have protruding ranges β (approximately 15°) spaced at 45° intervals, with eight of each located at different positions. This allows the spacing range α to be narrower than the conventional 60°, preventing the ring portion 40 from spreading outward when released from the mold. Also, because the protruding range β is small, there is less chance of it getting caught on the mold, so the TE ring D is not pulled and the TE bridge 41 is prevented from breaking.

[0026] Next, the nozzle cap C with the TE ring D is aligned and attached from above the molded nozzle inner plug B, and then set. First, when aligning the nozzle cap C, as shown in Figure 5, it is positioned from above the alignment protrusions 21 of the TE ring fitting portion 16 of the nozzle portion 13 of the nozzle plug B, by aligning them with the alignment recesses 44 that correspond to the inner circumference of the ring portion 40 of the TE ring D, and also from above the stopper receiving portions 25 of the stepped upper wall 17, by positioning them to align the stoppers 35 that correspond to the inner circumference of the outer wall 31 of the nozzle cap C, so that the nozzle cap C can be aligned more accurately with the nozzle plug B.

[0027] When the nozzle cap C is aligned and placed over the nozzle plug B from above, the lower inner edge of the lower undercut portions 46, which are arranged in eight locations circumferentially on the TE ring D, comes into contact with the upper outer edge of the upper protrusion 22 of the TE ring fitting portion 16 of the nozzle plug B, and the nozzle plug B is temporarily set in place while maintaining a horizontal position. The nozzle cap C is placed over the nozzle plug B and temporarily set at eight locations circumferentially at 45° intervals while maintaining horizontality, making it easy to maintain a horizontal state before plugging, and preventing the nozzle cap C from being plugged at an angle relative to the nozzle plug B.

[0028] When fitting the nozzle cap C onto the nozzle plug B, the nozzle cap C is pushed down from above, and the lower undercut portion 46 of the TE ring D climbs over the upper protrusion 22 of the TE ring fitting portion 16 of the nozzle plug B. When the lower undercut portion 46 gets over the upper protrusion 22, the overlapping allowance δ is small, so the nozzle cap C can maintain a horizontal state and get over the upper protrusion 22 from the provisionally set state without spreading the ring portion 40 of the TE ring D outward.

[0029] Next, the cap screwing portion 19 and male thread portion 27 of the inclined cylindrical portion 18 of the nozzle portion 13 of the nozzle plug B and the inner peripheral surface 31a and female thread portion 34 of the outer peripheral wall 31 of the nozzle cap C are inclined in parallel at an angle θ (a gradient of 5° in this embodiment). Therefore, when the nozzle cap C is pushed into the nozzle plug B while maintaining it horizontal, the inclined lower surface 34b of the female thread portion 34 of the nozzle cap C does not abut or slide against the inclined upper surface 27a of the male thread portion 27 until just before the completion of stoppering, and then just before the completion of stoppering, the inclined lower surface 34b abuts against and overcomes the inclined upper surface 27a of the male thread portion 27, and as shown in Figure 1, the female thread portion 34 of the nozzle cap C and the male thread portion 27 of the nozzle plug B fit together and screw together when the stoppering is completed.

[0030] Furthermore, during plugging, the lower undercut portion 46 of the ring portion 40 of the TE ring D abuts against the lower protrusion 23 of the TE ring fitting portion 16 of the nozzle inner plug B, and at the same time the upper undercut portion 45 abuts against the upper protrusion 22, creating resistance. However, since the overlap γ between the upper undercut portion 45 and the upper protrusion 22 is set smaller than in the past, and the overlap between the lower undercut portion 46 and the lower protrusion 23 is set similarly, the ring portion 40 can overcome this resistance without spreading outward.

[0031] As shown in Figures 1(b) and 4(c), directly below the four locations of the ring portion 40 where the TE bridges 41 connecting the TE ring D and the lower end of the outer peripheral wall 31 of the nozzle cap C are arranged, upper undercut portions 45 and lower undercut portions 46 are not arranged on the inner circumference, but are provided intermittently at spaced positions. Therefore, even when the lower undercut portions 46 and upper undercut portions 45 of the ring portion 40 of the TE ring D abut against the lower protrusions 23 and upper protrusions 22 of the TE ring fitting portion 16 of the nozzle inner plug B, this does not provide direct resistance near the TE bridges 41. Furthermore, the upper surfaces of the abutting protrusions 42 between the TE bridges 41 immediately abut against the lower end surface of the outer peripheral wall 31 and are not crushed, so no load is applied to the TE bridges 41 and they will not break when the plug is inserted.

[0032] When the plugging is completed, the female threaded portion 34 of the nozzle cap C and the male threaded portion 27 of the nozzle plug B fit together and screw together, and when the stopper 35 of the outer peripheral wall 31 engages with the stopper receiving portion 25 of the nozzle portion 13, the inner side of the lower end surface of the outer peripheral wall 31 abuts against the outer side of the upper surface of the stepped upper wall 17, and the nozzle cap C stops descending relative to the nozzle plug B and is attached. At the same time, the sealing tube 32 of the nozzle cap C is inserted into the nozzle opening 18a of the nozzle inner plug B, sealing the inside of the container.

[0033] The alignment protrusion 21 of the TE ring fitting portion 16 of the nozzle plug B engages with the alignment recess 44 on the inner circumference of the ring portion 40 of the TE ring D, so that the TE ring D is attached to the nozzle plug B so that it cannot rotate. Furthermore, the upper undercut portion 45 and the lower undercut portion 46 of the TE ring D are engaged with the upper protrusion 22 and the lower protrusion 23 of the nozzle inner plug B at two points, top and bottom, so that the ring is attached so as not to come off easily even if the engagement allowance γ at each point is small.

[0034] The nozzle cap C of this embodiment can be attached to the nozzle plug B by fitting and screwing the female thread portion 34 of the nozzle cap C into the male thread portion 27 of the nozzle plug B, and the nozzle cap C can attach the TE ring D to the TE ring fitting portion 16 of the nozzle plug B in an unrotatable state without breaking the TE bridge 41 connected to the TE ring D.

[0035] In the conventional screw cap setting process, nozzle cap C is molded first, then nozzle inner plug B is molded, and nozzle cap C is then screwed on and attached while nozzle inner plug B is still cool. The reason for this is that immediately after molding (in this case, the temperature is approximately 40°C), nozzle inner plug B expands and its outer circumference becomes larger, so with a conventional screw cap (which has a one-step protrusion formed on the outer circumference of the TE ring fitting portion of the nozzle inner plug and a one-step undercut formed on the inner circumference of the ring portion of the TE ring, with a large overlap, for example 0.27 mm, to prevent the TE ring from coming off after the cap is opened), if the TE ring does not expand enough, the TE ring cannot be attached to the nozzle inner plug, making the TE bridge prone to being crushed or broken.

[0036] In the screw cap of this embodiment, two tiers of upper and lower protrusions 22 and lower protrusions 23 are arranged around the entire outer periphery of the TE ring fitting portion 16 of the nozzle plug B, and two tiers of upper and lower undercut portions 45 and lower undercut portions 46 are arranged circumferentially and intermittently (each with a small arc width to distribute their locations) around the inner periphery of the ring portion 40 of the TE ring D, with a maximum overlap γ of 0.15 mm. Therefore, even if the outer periphery of the nozzle plug B immediately after molding (at a temperature of 40°C) is large, the overlap does not become large enough to spread out the TE ring D, and the TE bridge 41 will not be crushed or broken.

[0037] By plugging, the screw cap with the nozzle cap C attached to the nozzle plug B becomes a container with a screw cap attached by screwing the outer tube 10 of the nozzle plug B into the mouth 1 of the container body A filled with the contents.

[0038] Next, to use the container equipped with the screw cap of this embodiment, the nozzle cap C is rotated relative to the nozzle inner plug B in the opening direction. When the nozzle cap C is rotated, the female thread portion 34 of the outer peripheral wall 31 of the nozzle cap C and the male thread portion 27 of the nozzle portion 13 of the nozzle plug B are unscrewed, causing the nozzle cap C to rise relative to the nozzle plug B.

[0039] As the nozzle cap C rotates, the TE ring D connected to the nozzle cap C is attached so as to be unable to rotate relative to the TE ring fitting portion 16 of the nozzle plug B and to prevent it from coming off, so as the nozzle cap C rises, it breaks the TE bridge 41 and separates the TE ring D from the nozzle cap C. Furthermore, by rotating the nozzle cap C, unscrewing the female thread portion 34 from the male thread portion 27, and removing the nozzle cap C from the nozzle plug B, and then tilting the container, the contents in the container body A can be poured out from the nozzle opening 18a of the nozzle portion 13 of the nozzle plug B, and further, the contents can be ejected by squeezing the body portion 2 of the container body A.

[0040] After using the contents, stop squeezing the body 2 of the container body A, return the container to its upright position, and screw the nozzle cap C onto the nozzle stopper B again to close the lid, so that the outer periphery of the sealing tube 32 of the nozzle cap C seals the nozzle opening 18a of the nozzle part 13 of the nozzle stopper B, thereby sealing the inside of the container. In addition, just before the lid is completely closed, the stopper 35 on the outer wall 31 of the nozzle cap C engages with the stopper receiving portion 25 on the upper step wall 17 of the nozzle plug B to stop the rotation of the lid, so that the nozzle cap C is not rotated more than necessary and can be closed stably.

[0041] When the lid is first opened, the TE bridge 41 breaks from the nozzle cap C, leaving the TE ring D in the TE ring fitting portion 16 of the nozzle portion 13 of the nozzle plug B. Therefore, by visually checking the broken state of the TE bridge 41 from the outside, it is possible to confirm whether the container has been opened or not. [Industrial Applicability]

[0042] The screw cap of the present invention can prevent the TE bridge connecting the lower end of the nozzle cap and the TE ring from being crushed or broken when the nozzle cap with a TE ring is fitted onto the nozzle portion of the nozzle plug. Furthermore, the screw cap of the present invention can prevent the TE bridge from being crushed or broken even when a nozzle cap with a TE ring is attached to a nozzle inner plug by stoppering immediately after molding. Therefore, it is possible to check whether the screw cap has been opened or not by the state of the TE ring, and the screw cap is suitable as a screw cap that can be widely used for containers of food and beverages, etc. [Explanation of symbols]

[0043] A Container body B Nozzle plug C Nozzle cap D TE Ring α Interval Range β Projection range γ, δ Overlap allowance θ angle 1 Mouth 2. Torso 3 Bulkhead 4 Close-fitting tube 5 Male thread 10 outer cylinder 11 Upper wall 12 Inner cylinder 13 Nozzle section 14 Female thread 16 TE ring fitting part 17th Step Upper Wall 18 Inclined cylinder part 18a Nozzle mouth 19 Cap screw part 21 Alignment protrusion 22 Upper protrusion 23 Lower protrusion 25 Stopper receiving part 27 Male thread 27a Slanted top surface 27b Flat bottom surface 30 Top Wall 31 Outer wall 31a Inner surface 32 Closed Envelope 34 Female thread 34a flat top surface 34b Sloped bottom surface 35 Stopper 40 Ring section 41 TE Bridge 42 Contact protrusion 44 Alignment recess 45 Upper undercut 46 Lower undercut

Claims

1. The nozzle cap has a nozzle portion and is attached to a container body, and has a TE ring connected to a lower end thereof via a breakable TE bridge, and is screwed onto the nozzle portion of the nozzle plug. The nozzle portion of the nozzle plug has a cap screw portion that is tapered and inclined, a TE ring fitting portion that is formed below the cap screw portion and into which a TE ring is fitted, and an upper protrusion and a lower protrusion that are provided around the outer periphery of the TE ring fitting portion, The nozzle cap has an outer peripheral wall whose inner peripheral surface corresponds to the cap screw-on portion of the nozzle portion, and upper and lower undercut portions that protrude from the inner peripheral surface of the TE ring and engage with the upper and lower protrusions of the nozzle inner plug when the lid is closed, The nozzle cap is a screw cap characterized in that when temporarily set on the nozzle plug, the nozzle cap maintains a horizontal position by abutting the upper protrusion and the lower undercut portion.

2. The upper protrusion has an outer diameter smaller than that of the lower protrusion, 2. The screw cap according to claim 1, wherein the upper undercut portion has an inner diameter smaller than the inner diameter of the lower undercut portion.

3. 2. The screw cap according to claim 1, wherein the TE ring has two upper and lower undercut portions intermittently disposed at positions spaced apart from the TE bridge.

4. 3. The screw cap according to claim 2, wherein the TE ring has two upper and lower undercut portions intermittently disposed at positions spaced apart from the TE bridge.

5. The nozzle plug has a positioning projection that projects from the TE ring fitting portion, 5. The screw cap according to claim 1, wherein the nozzle cap has an alignment recess on the inner periphery of the TE ring, which fits onto an alignment protrusion of the nozzle inner plug.

6. 5. The screw cap according to claim 1, wherein the nozzle cap can be attached to the nozzle inner plug immediately after molding.

7. 6. The screw cap according to claim 5, wherein the nozzle cap can be screwed onto the nozzle plug immediately after molding.

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