Container with cap

Abstract

To provide a container with a cap capable of suppressing leakage of content fluid in a container body without using a packing.SOLUTION: A container is provided with a container body A and a cap B screwed on a mouth 1 of the container body A, wherein the cap B includes: a peripheral wall part 10 attached on an outer periphery of the mouth 1 upon closing a lid; a top wall part 11 arranged extendingly inward from an upper end of the peripheral wall part 10; an inner cylinder 12 suspended from a lower surface of the top wall part 11 and inserted into an inner peripheral 1a of the mouth 1; and an outer cylinder 13 abutting on an outer peripheral surface 3b of the mouth 1. The outer cylinder 13 includes an upper engaging lib 26 circumferentially arranged on an upper part of an inner periphery and engaging with the outer peripheral surface 3b of the mouth 1. The upper engaging lib 26 includes a reversed taper surface 29 oblique to an inner radial direction by a specific angle θ. The reversed taper surface 29 expends through deformation of the inner cylinder 12 to an outer radial direction by the specific angle θ upon closing the lid to abut to the outer peripheral surface 3b of the mouth 1.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a container with a cap, and more particularly to a container with a cap that can suppress leakage of the content liquid.

Background Art

[0002] Conventionally, as a container with a cap, in order to omit a packing provided between the mouth part of the container body and the cap, a container body in which a content liquid is accommodated and a capped cylindrical cap screwed to the mouth part of the container body are provided. There is known one provided with an inner cylinder that protrudes downward from the top wall portion of the cap and is fitted into the mouth part. In such a container with a cap, after filling the content liquid, for example, when the internal pressure of the container body rises or an impact force is applied, the inner cylinder may be deformed and the content liquid in the container body may leak.

[0003] Therefore, the inner peripheral surface of the mouth part includes a first inner peripheral surface located at the upper end part and extending downward from the upper end opening edge of the mouth part, a first step surface extending radially inward from the lower end part of the first inner peripheral surface, and a second inner peripheral surface extending downward from the radially inner end part of the first step surface. On the cap top wall part, there are provided an inner cylinder that protrudes downward and is inserted into the mouth part, and an outer cylinder that protrudes downward and abuts against the outer peripheral surface of the mouth part. The outer peripheral surface of the inner cylinder extends downward from the lower surface of the top wall part and includes a first outer peripheral surface that abuts against the first inner peripheral surface, a second step surface that extends radially inward from the lower end part of the first outer peripheral surface, and a second outer peripheral surface that extends downward from the radially inner end part of the second step surface. A vertical gap is provided between the second step surface and the first step surface, and the second outer peripheral surface abuts against or is close to the second inner peripheral surface. A container with a cap is known (see Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the capped container described in Patent Document 1, since the axial dimension of the peripheral wall portion of the cap is shorter than the outer diameter dimension of the top wall portion, after filling the content liquid and screwing on the cap, for example, when the internal pressure of the container body rises or an impact force is applied to the cap, it may be difficult to suppress the leakage of the content liquid in the container body from the inner cylinder of the cap.

[0006] An object of the present invention is to solve the above problems and provide a capped container capable of suppressing leakage of the content liquid in the container body without using a packing.

Means for Solving the Problems

[0007] In order to solve the above problems, the present invention provides a capped container comprising a container body for containing a content liquid and a cap screwed onto the mouth portion of the container body. The container body has a male screw portion screwed on the outer periphery of the mouth portion, and the cap has a peripheral wall portion mounted on the outer periphery of the mouth portion when closed, a female screw portion screwed on the inner periphery of the peripheral wall portion and engaged with the male screw portion of the mouth portion, a top wall portion extending inward from the upper end of the peripheral wall portion, an inner cylinder vertically provided from the lower surface of the top wall portion and inserted into the inner peripheral surface of the mouth portion, and an outer cylinder in contact with the outer peripheral surface of the mouth portion. The outer cylinder has an upper engagement rib provided on the upper part of the inner periphery and engaged with the outer peripheral surface of the mouth portion. The upper engagement rib has an inverted tapered surface inclined radially inward at a predetermined angle from the upper end. The inverted tapered surface expands radially outward by the deformation of the inner cylinder by a predetermined angle and contacts the outer peripheral surface of the mouth portion when closed.

[0008] As an embodiment of the container with a cap, the cap adopts a configuration characterized in that it is thickened along the axial range of the inner circumference of the peripheral wall portion where the female screw portion is screwed, and the cap also adopts a configuration characterized in that it is provided with a plurality of anti-deformation ribs protruding radially between the outer cylinder and the peripheral wall portion. Further, the mouth portion of the container body includes an inclined stepped portion that slopes upward and outward and expands in diameter, and an upper end opening edge that extends upward from the upper end of the inclined stepped portion and opens. The inner cylinder has, on its outer circumference, an upper diameter-expanded surface portion that abuts against the inner circumferential surface of the upper end opening edge of the mouth portion from above, an inclined surface portion that slopes inward and downward from the lower end of the upper diameter-expanded surface portion, and a lower diameter-reduced surface portion that is vertically provided from the lower end of the inclined surface portion and abuts against or is close to the inner circumferential surface of the mouth portion.

Advantages of the Invention

[0009] By adopting the above configuration, the container with a cap of the present invention has good sealing performance inside the container after the cap is screwed on without using a packing, and also ensures airtightness against an increase in internal pressure, suppressing the leakage of the content liquid inside the container body.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0011] Next, embodiments of the container with a cap of the present invention will be described with reference to examples and the drawings. In the following description, with reference to FIG. 1(a), the vertical direction is defined as the "axial direction", the upward direction is defined as "up", the downward direction is defined as "down", and the left-right direction is defined as the "radial direction".

[0012] (Example) In FIG. 1, A is a bottomed cylindrical container body for storing the content liquid, and B is a capped cylindrical cap screwed onto the container body A.

[0013] As shown in FIGS. 1 and 2, the container body A is formed in a bottomed cylindrical shape. The upper part consists of a mouth part 1 with a wide mouth having an inner diameter of about 30 mm to 50 mm, for example. The mouth part 1 has, at the upper part, an inclined step part 2 that slopes upward and outward to expand the diameter, and an upper end opening edge 3 that extends upward from the upper end of the inclined step part 2 and opens. At the middle of the outer periphery of the mouth part 1, a male screw part 4 that engages with the inner periphery of the cap B is screwed.

[0014] Furthermore, on the inner periphery of the mouth part 1, there are formed a first inner peripheral surface 1a extending in the axial direction, an inclined inner peripheral surface 2a that slopes along the inner periphery of the inclined step part 2 from the upper end of the first inner peripheral surface 1a, a second inner peripheral surface 3a that extends in the axial direction along the inner periphery of the upper end opening edge 3 from the upper end of the inclined inner peripheral surface 2a, and an outer peripheral surface 3b that extends in the axial direction along the outer periphery of the upper end opening edge 3.

[0015] As shown in FIGS. 1 to 3, the cap B includes a peripheral wall part 10 that is attached to the outer periphery of the mouth part 1 of the container body A when closed, and a top wall part 11 that extends inward from the upper end of the inner periphery of the peripheral wall part 10. The outer diameter dimension of the top wall part 11 is set to about 3 to 5 times the axial dimension of the peripheral wall part 10. From the lower surface of the top wall part 11, an inner cylinder 12 that is inserted into the second inner peripheral surface 3a and the first inner peripheral surface 1a of the upper end opening edge 3 of the mouth part 1 and deforms radially inward, and an outer cylinder 13 that abuts against and deforms on the outer peripheral surface 3b of the upper end opening edge 3 of the mouth part 1 are vertically provided.

[0016] The peripheral wall portion 10 has an internal thread portion 15 screwed on the inner periphery thereof, which is screwed with the external thread portion 4 screwed on the outer periphery of the mouth portion 1. Ribbing 16 is provided along the axial range of the inner periphery where the internal thread portion 15 is screwed. On the outer periphery, irregularities are formed, such as a regular 16-sided polygon or a knurl, so as to be easily gripped by fingers. Due to the formation of irregularities on the outer periphery of the peripheral wall portion 10, thick-wall and thin-wall portions are formed in the peripheral wall portion 10. However, on the inner periphery of the peripheral wall portion 10, the ribbing 16 thickens the wall thickness at the portion where the ribbing is provided, so that the overall shape retention of the peripheral wall portion 10 is improved. When the lid is closed, the inner cylinder 12 and the outer cylinder 13 in close contact with the mouth portion 1 are not greatly deformed, and sealing failure can be suppressed. Also, since the ribbing 16 is provided on the inner periphery, it does not affect the appearance of the peripheral wall portion 10.

[0017] The top wall portion 11 is formed with a thin wall as a whole, with the portion inside the outer peripheral edge portion 11a being recessed. Note that the top wall portion 11 may be formed flat over the entire upper surface. On the lower surface of the top wall portion 11, a ring-shaped recess 18 is recessed at a slight distance radially inward from the inner cylinder 12. Between the inner cylinder 12 and the outer cylinder 13, a contact ring 19 that abuts against the upper end surface of the upper end opening edge 3 of the container body A when the lid is closed is protruded. As shown in FIG. 3(b), between the outer cylinder 13 and the peripheral wall portion 10, a plurality (in this embodiment, 16 at 22.5° intervals) of anti-deformation ribs 20 are protruded in the radial direction at a predetermined interval in the circumferential direction.

[0018] From the above, the wall thickness of the top wall portion 11 becomes a thin-wall portion 11b at the ring-shaped recess 18, and between the ring-shaped recess 18 and the inner cylinder 12, it becomes a thick-wall portion 11c that is thicker than the thin-wall portion 11b and prevents deformation. Also, between the outer cylinder 13 and the peripheral wall portion 10, a plurality of anti-deformation ribs 20 that suppress deformation are arranged at intervals, so that the weight of this portion can be reduced over the entire circumference.

[0019] The inner cylinder 12 has a substantially constant inner diameter and extends in the axial direction. The outer circumference thereof includes an upper diameter-expanded surface portion 22 that contacts the second inner circumferential surface 3a of the upper end opening edge 3 of the mouth portion 1 when the lid is closed, an inclined surface portion 23 that inclines radially inward and downward from the lower end of the upper diameter-expanded surface portion 22, and a lower diameter-reduced surface portion 24 that is vertically provided from the lower end of the inclined surface portion 23 and is formed to have a diameter smaller than that of the upper diameter-expanded surface portion 22 and to contact or be close to the upper portion of the first inner circumferential surface 1a of the mouth portion 1. The upper diameter-expanded surface portion 22 is formed such that its outermost diameter is larger than the diameter of the second inner circumferential surface 3a of the upper end opening edge 3 of the mouth portion 1. When the lid is closed, a pressing convex surface 22a is formed which is deformed radially inward and closely adheres to the second inner circumferential surface 3a of the upper end opening edge 3 with a tightening margin.

[0020] The outer cylinder 13 is provided with an upper engaging rib 26 that is circumferentially provided on the upper portion of the inner circumference and engages with the outer circumferential surface 3b of the upper end opening edge 3 of the mouth portion 1 when the lid is closed, and a lower guiding rib 27 that is circumferentially provided below the upper engaging rib 26. As shown in FIG. 2(b), the upper engaging rib 26 is formed with a flat reverse taper surface 29 that inclines radially inward from the upper end 29a at an angle θ of 2° to 5° (in this embodiment, 3.5°) toward the lower end 29b, and the inner diameter of the upper end 29a is formed to be slightly smaller than the diameter of the outer circumferential surface 3b of the upper end opening edge 3. The lower guiding rib 27 is formed such that its innermost diameter is larger than the inner diameter of the upper end 29a of the upper engaging rib 26. Note that the lower guiding rib 27 may not be provided.

[0021] Next, the usage mode and working effects of this embodiment will be described. For the capped container of this embodiment, first, after filling the container body A with the content liquid, the cap B is placed on the mouth portion 1 and screwed thereon to form a capped container with the lid closed.

[0022] When closing the lid, the lower inner circumference of the peripheral wall portion 10 of the cap B is placed on the upper outer circumference of the mouth portion 1 of the container body A, the lower end of the female screw portion 15 is brought into contact with the upper end of the male screw portion 4, and while rotating the cap B with respect to the container body A, it is lowered by screwing. At that time, as shown in Fig. 2(b), it is inserted into the second inner peripheral surface 3a of the upper end opening edge 3 of the mouth part 1 from the lower reduced-diameter surface part 24 of the inner cylinder 12 of the cap B. As the cap B descends, as shown in Fig. 4(a), the inclined surface part 23 of the inner cylinder 12 abuts against the upper end of the second inner peripheral surface 3a of the upper end opening edge 3. Furthermore, as the cap B continues to descend, the pressing convex surface 22a of the upper enlarged-diameter surface part 22 deforms radially inward as indicated by the arrow in Fig. 4(b) while being inserted into the second inner peripheral surface 3a of the upper end opening edge 3.

[0023] Then, the upper end of the outer peripheral surface 3b of the upper end opening edge 3 abuts against or approaches the tip of the lower guide rib 27 on the inner periphery of the outer cylinder 13 and is guided on the inner periphery of the outer cylinder 13. Furthermore, as the cap B continues to descend, the upper end of the outer peripheral surface 3b of the upper end opening edge 3 abuts against the vicinity of the lower end 29b of the reverse taper surface 29 of the upper engaging rib 26 and gets over it. The upper engaging rib 26 widens the outer cylinder 13 radially outward as indicated by the arrow in Fig. 4(b) by an angle θ so that the outer peripheral surface 3b of the upper end opening edge 3 gets over the lower end 29b of the reverse taper surface 29 of the upper engaging rib 26 of the outer cylinder 13 and slides along the reverse taper surface 29, making the reverse taper surface 29 the contact surface against the outer peripheral surface 3b of the upper end opening edge 3.

[0024] Finally, as shown in Fig. 4(b), the contact ring 19 of the cap B abuts against and adheres tightly to the upper surface of the upper end opening edge 3, and the screwing of the male screw part 4 and the female screw part 15 is stopped, and the cap B is closed on the container body A. During the closing process, the outer cylinder 13 abuts against and adheres tightly to the outer peripheral surface 3b of the upper end opening edge 3. Due to the reverse taper surface 29, as shown in Fig. 1(b), the outer cylinder 13 is deformed so that the lower part faces outward in the circumferential direction at an angle θ, and the reverse taper surface 29 of the upper engaging rib 26 is pressed against the outer peripheral surface 3b by the force for the outer cylinder 13 to return to its original state.

[0025] When the lid is closed, the inner cylinder 12 of the cap B is such that the lower diameter-reduced surface portion 24 abuts or is close to the upper part of the first inner peripheral surface 1a of the mouth portion 1 of the container body A, and the pressing convex surface 22a of the upper diameter-expanded surface portion 22 is in close contact with the second inner peripheral surface 3a of the upper end opening edge 3 with a tightening allowance. The upper engaging rib 26 of the outer cylinder 13 is in close contact with the outer peripheral surface 3b of the upper end opening edge 3. Thus, the cap B holds the mouth portion 1 between the inner cylinder 12 and the outer cylinder 13 and is attached to the container body A. Therefore, for example, even if the internal pressure of the container body A rises or an impact force is applied, deformation of the mouth portion 1 is suppressed, and the inner cylinder 12 can be prevented from deforming in a direction away from the first inner peripheral surface 1a of the mouth portion 1, improving the sealing performance inside the container body A. Also, airtightness as a container can be ensured without using a packing as in the prior art.

[0026] Moreover, since a gap is provided between the upper surface of the inclined step portion 2 of the mouth portion 1 and the inclined surface portion 23 of the inner cylinder 12 of the cap B, even if the content liquid inside the container body A enters between the lower diameter-reduced surface portion 24 of the inner cylinder 12 and the first inner peripheral surface 1a of the mouth portion 1, it can be retained in the space of the gap and made less likely to advance further.

[0027] The outer cylinder 13 is expanded radially outward at an angle θ by the reverse taper surface 29 that abuts against the outer peripheral surface 3b of the upper end opening edge 3. Due to the force that the outer cylinder 13 tries to return to its original state, it is pressed against the outer peripheral surface 3b. Thus, the sealing performance between the upper engaging rib 26 and the outer peripheral surface 3b is good, and the contact area between the inner circumference of the outer cylinder 13 and the outer peripheral surface 3b of the upper end opening edge 3 can be suppressed, and the torque required to attach and detach the cap B to and from the mouth portion 1 can be suppressed.

[0028] Of the top wall portion 11, the portion where the ring-shaped recess 18 is recessed at a slight distance inward from the inner cylinder 12 is the thin-walled portion 11b. Therefore, when the internal pressure of the container body A rises, by deforming the thin-walled portion 11b, the inner side of the thin-walled portion 11b of the top wall portion 11 can be deformed upward, suppressing the rise in the internal pressure of the container body A. Even if the internal pressure in the container rises, together with the outside of the thick-walled portion 11c of the top wall portion 11 that is not deformed, the inner cylinder 12 and the outer cylinder 13 can rise with respect to the mouth portion 1, preventing the airtightness from being impaired, and improving the sealing performance inside the container body A.

Industrial Applicability

[0029] The capped container of the present invention can ensure good airtightness inside the container after screwing on the cap without using a packing, and can also ensure airtightness against an increase in internal pressure, suppressing the leakage of the content liquid inside the container body. Therefore, it is suitable as a capped container for storing various beverages, food seasonings, and content liquids such as cosmetics and drugs.

Explanation of Reference Numerals

[0030] A Container body B Cap θ Angle 1 Mouth portion 1a First inner peripheral surface 2 Inclined step portion 2a Inclined inner peripheral surface 3 Upper end opening edge 3a Second inner peripheral surface 3b Outer peripheral surface 4 Male screw portion 10 Peripheral wall portion 11 Top wall portion 11a Outer peripheral edge portion 11b Thin-walled portion 11c Thick-walled portion 12 Inner cylinder 13 Outer cylinder 15 Female screw portion 16 Reinforcement 18 Ring-shaped recess 19 Contact ring 20 Deformation prevention rib 22 Upper diameter-expanded surface 22a Pressed convex surface 23 Inclined surface 24 Lower diameter-reduced surface 26 Upper engagement rib 27 Lower guide rib 29 Reverse taper surface 29a Upper end 29b Lower end

Claims

1. A container body for containing a content liquid, and a cap screwed onto the mouth of the container body, The container body includes a male screw portion screwed on the outer periphery of the mouth, The cap includes, when closed, a peripheral wall portion mounted on the outer periphery of the mouth, a female screw portion screwed on the inner periphery of the peripheral wall portion and screwed with the male screw portion of the mouth, a top wall portion extending inward from the upper end of the peripheral wall portion, an inner cylinder vertically provided from the lower surface of the top wall portion and inserted into the inner peripheral surface of the mouth, and an outer cylinder contacting the outer peripheral surface of the mouth, The outer cylinder includes an upper engaging rib provided around the upper part of the inner periphery and engaging with the outer peripheral surface of the mouth, The upper engaging rib includes an inverted taper surface inclined radially inward at a predetermined angle from the upper end, The inverted taper surface is characterized in that when the cap is closed, it expands by the deformation of the inner cylinder radially outward by a predetermined angle and contacts the outer peripheral surface of the mouth. A container with a cap.

2. The cap is characterized in that it is thickened along the axial range of the inner periphery of the peripheral wall portion where the female screw portion is screwed. The container with a cap according to claim 1.

3. The cap is characterized in that it includes a plurality of anti-deformation ribs protruding radially between the outer cylinder and the peripheral wall portion. The container with a cap according to claim 1 or 2.

4. The mouth of the container body includes an inclined stepped portion inclined upward and outward to expand the diameter, and an upper end opening edge extending upward from the upper end of the inclined stepped portion and opening, The inner cylinder includes, on the outer periphery, an upper diameter-expanding surface portion contacting the inner peripheral surface of the upper end opening edge of the mouth from above, an inclined surface portion inclined inward and downward from the lower end of the upper diameter-expanding surface portion, and a lower diameter-reducing surface portion vertically provided from the lower end of the inclined surface portion and contacting or approaching the inner peripheral surface of the mouth. The container with a cap according to claim 1 or 2.

5. The mouth of the container body includes an inclined stepped portion inclined upward and outward to expand the diameter, and an upper end opening edge extending upward from the upper end of the inclined stepped portion and opening, The inner cylinder includes, on the outer periphery, an upper diameter-expanding surface portion contacting the inner peripheral surface of the upper end opening edge of the mouth from above, an inclined surface portion inclined inward and downward from the lower end of the upper diameter-expanding surface portion, and a lower diameter-reducing surface portion vertically provided from the lower end of the inclined surface portion and contacting or approaching the inner peripheral surface of the mouth. The container with a cap according to claim 3.

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