cap

Abstract

To provide a cap that allows for easy sucking back of the contents inside the dispensing port after use, even with relatively viscous liquid contents. [Solution] A cap comprising: a cap body B attached to a double-walled container A and having a discharge port 10a for discharging the contents; an upper lid D for opening and closing the discharge port 10a of the cap body B; a stopper E attached between the cap body B and the double-walled container A and having a flow path on the inside that communicates with the double-walled container A; and a valve body F attached between the cap body B and the stopper E and opening and closing the flow path between the cap body B and the stopper E, wherein the valve body F communicates with the discharge port 10a and has a valve cylinder portion 37 on the inside that houses a ball valve G so that it can move up and down, and the valve cylinder portion 37 is characterized by having a notched window portion 41 into which the contents can flow when the ball valve G rises to its upper limit, and a liquid intake groove 42 recessed downward from the inner circumference side of the notched window portion 41.

Description

Technical Field

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[0001] The present invention relates to a cap attached to a double container, and more particularly to a cap having a sack-back mechanism.

Background Art

[0002] A laminated peelable container (delamination container) in which an inner container that can be deformed to shrink as the content liquid decreases is peelably laminated inside an elastically deformable outer container while filling the content liquid can discharge the content liquid without replacing the content liquid in the filling space with outside air. Therefore, it is suitable as a container for storing a content liquid that may deteriorate in quality due to contact with outside air.

[0003] As a cap used for this type of container, a middle plug member that closes the mouth of the container, a communication port that penetrates the middle plug member in the axial direction of the container and communicates the discharge port with the inside of the inner container, and the middle plug member are seated from the discharge port side along the axial direction of the container to close the communication port, and an opening / closing valve portion that opens the communication port by elastically displacing to the discharge port side are provided. The opening / closing valve portion has a housing cylinder portion that extends in the axial direction of the container and communicates with the discharge port, and a sliding body is housed slidably in the axial direction of the container. A cap is conventionally known (see, for example, 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, the cap described in Patent Document 1 above had a problem in that, when it contained a relatively viscous liquid such as cooking oil, the sliding body (ball valve) that slides inside the housing cylinder of the opening and closing valve did not move well when sucking back the liquid into the inner container after dispensing, resulting in insufficient sucking back. This made it easy for a film to form at the discharge port, and when closing the lid or using it again, the film would break and the remaining liquid would splash out.

[0006] The present invention aims to solve the above problems and to provide a cap that allows the contents inside the discharge port to be easily sucked back in after use, even if the contents are relatively viscous. [Means for solving the problem]

[0007] To solve the above problems, the present invention provides a cap comprising: a cap body attached to a double-walled container and having a discharge port for discharging the contents; an upper lid for opening and closing the discharge port of the cap body; a stopper body attached between the cap body and the double-walled container and having a flow path on the inside that communicates with the double-walled container; and a valve body attached between the cap body and the stopper body and opening and closing the flow path between the cap body and the stopper body, wherein the valve body communicates with the discharge port and has a valve cylinder portion on the inside that houses a ball valve so as to be able to move up and down, and the valve cylinder portion is characterized by having a notched window portion into which the contents can flow when the ball valve is raised to its upper limit, and a liquid intake groove recessed downward from the inner circumference side of the notched window portion.

[0008] As an embodiment of the cap, the stopper body comprises a mounting cylinder portion suspended from the cap body, a bottom wall portion extending inward from the lower end of the mounting cylinder portion and having a flow passage opening, and a valve cylinder erected from the bottom wall portion. The valve body is characterized by having a valve plate whose periphery is attached to the mounting cylinder portion of the stopper body, which is in contact with the upper end surface of the valve cylinder in an openable and closable manner by elastic deformation, and whose inner edge is connected to the valve cylinder portion. Furthermore, the liquid intake groove is characterized by being recessed to at least the position of the lower end of the ball valve when the ball valve rises to its upper limit within the valve cylinder portion, and also by being recessed to a position higher than the position of the upper end of the ball valve when the ball valve descends to its lower limit within the valve cylinder portion. [Effects of the Invention]

[0009] By adopting the above configuration, the cap of the present invention allows for good liquid drainage after use, even with relatively viscous liquids such as edible oil contained in a double-walled container. It can draw any remaining liquid inside the nozzle into the cap, preventing a film from forming on the nozzle. [Brief explanation of the drawing]

[0010] [Figure 1] This is a side cross-sectional view showing the closed lid state of a double-walled container with a cap attached, which is an embodiment of the present invention. [Figure 2] This figure shows the valve body of a cap, which is an embodiment of the present invention; (a) is a top view, and (b) is an enlarged view of the main part of Figure 1. [Figure 3] This is a side cross-sectional view of a double-walled container with a cap attached, which is an embodiment of the present invention, after opening the lid and pressing the body of the container to use the contents. [Figure 4] This is a side cross-sectional view of a double-walled container with a cap attached, which is an embodiment of the present invention, immediately after the pressure on the container body has been released after the contents have been used. [Modes for carrying out the invention]

[0011] Next, the cap of the present invention will be described with reference to the drawings shown in the following embodiments. In the following explanation, as seen in Figure 1, the left direction is referred to as the "discharge side," the right direction as the "back side," the upward direction as "up," and the downward direction as "down."

[0012] (Examples) In Figure 1, A is a double-walled container for holding relatively viscous liquid contents such as cooking oil, B is a cap body attached to the double-walled container A, D is a top lid that is connected to the cap body B via a hinge C so as to be openable and closable, E is a stopper body installed between the cap body B and the double-walled container A, which closes the opening of the double-walled container A and has a flow path on the inside, and F is a valve body installed between the cap body B and the stopper body E, which closes the flow path of the cap body B. The valve body F has a spherical ball valve G installed on the inside so as to be able to move up and down, and is configured as a suck-back mechanism. In this embodiment, the cap is formed as a hinged cap in which the cap body B and the top lid D are connected via a hinge C.

[0013] As shown in Figure 1, the double-walled container A is formed as a double-walled container (double-walled container) having a mouth tube portion 1 formed at the top and an outer container A1 which can be elastically deformed by squeezing the body portion (not shown) formed below the mouth tube portion 1, and an inner container A2 which can reduce the volume relative to the outer container A1 inside the outer container A1. The end portion 4 of the inner container A2 is pressed against the upper end surface 3 of the mouth tube portion 1 of the outer container A1 to close the outer container A1. The inner container A2 is made of a material and thickness that allows for volume reduction and deformation, while the outer container A1 is made of a material and thickness that allows for elastic deformation. The materials of each can be changed as appropriate.

[0014] The mouth portion 1 of the outer container A1 has a threaded portion (male thread) 5 formed on the upper part of its outer circumference, and a locking projection 6 is provided below the threaded portion (male thread) 5. Furthermore, an outside air inlet 7 for introducing outside air between the outer container A1 and the inner container A2 is drilled at a predetermined location, including the threaded portion (male thread) 5, at a height near the lower end of the outer circumference of the threaded portion (male thread) 5 of the mouth portion 1. When the body of the outer container A1 is squeezed, the liquid contents are discharged to the outside from the cap body B. After the squeeze of the body is released, outside air is introduced between the outer container A1 and the inner container A2 through the outside air inlet 7, causing the inner container A2 to deform and reduce in volume, while the outer container A1 returns to its original state. This prevents outside air from entering the inner container A2 by replacing the dispensed liquid, thereby suppressing contact between the liquid and the outside air and maintaining its quality.

[0015] As shown in Figure 1, the cap body B has a partition wall 10 with a plug E attached to its lower outer edge and an opening 10a on the discharge side from the center, an outer peripheral wall 11 that extends vertically from the outer edge of the partition wall 10 and to which the plug E and the mouth portion 1 of the outer container A1 are attached to its inner circumference, and a discharge pipe 12 that is erected around the discharge opening 10a of the partition wall 10.

[0016] On the lower surface of the partition wall 10, a stop projection 14 is provided in the center to prevent the ball valve G from coming out of the valve body F by contacting its lower end during container use, and an inner cylinder 15 is provided vertically from the center with a predetermined diameter (at least a diameter outside the discharge port 10a), the outer circumference of which is inserted into the inner circumference of the stopper body E.

[0017] On the inner circumference of the outer peripheral wall 11, there is a plug mounting section 18 at the top for attaching the plug body E, and below the plug mounting section 18, there are multiple vertical ribs 19 arranged at equal intervals that engage (screw) with the outer circumference of the threaded portion (male thread) 5 provided on the mouth section 1 of the outer container A1, and below the vertical ribs 19, there is a container locking section 20 that engages with the outer circumference of the locking projection 6 formed on the mouth section 1 when attached to prevent it from falling out, and inside the container locking section 20, there is a recess in the vertical direction at least at one location on the inner surface, and a ventilation groove 21 is formed to allow air to flow between it and the outer circumference of the locking projection 6. In this embodiment, the cap body B is fitted into the double container A by being pressed in, and the shape of the threaded portion (male thread) 5 of the mouth section 1 is transferred to the inside of each vertical rib 19 due to stress relaxation caused by creep, thereby forming a thread groove. On the outer periphery of the outer peripheral wall 11, a lid engaging portion 23 that engages with the upper lid D is provided at the upper end portion, and a hinge C is continuously provided on the back side below the lid engaging portion 23.

[0018] The plug body E has a mounting flange portion 25 whose outer periphery is fitted into the plug body mounting portion 18 on the inner periphery of the outer peripheral wall 11 of the cap body B and is mounted, a close contact cylinder portion 26 that is vertically provided from the lower surface of the inner edge of the mounting flange portion 25 and whose outer periphery is inserted into and closely contacts the upper inner periphery of the inner container A2, an inclined cylinder portion 27 that inclines downward and inward from the lower end of the close contact cylinder portion 26, a mounting cylinder portion 28 that is continuously provided at the lower end of the inner periphery of the inclined cylinder portion 27 and extends vertically, a ring-shaped bottom wall portion 29 that extends inward from the lower end of the inner periphery of the mounting cylinder portion 28 and has a flow port 29a opened at the center, and a valve cylinder 30 that stands upright from the upper surface of the bottom wall portion 29. The mounting cylinder portion 28 has an inner cylinder 15 of the cap body B inserted into and closely contacting the upper portion of the inner periphery, and a valve body mounting portion 32 that is provided at the lower portion of the inner periphery for mounting the valve body F inward so as not to fall off.

[0019] As shown in FIGS. 1 and 2, the valve body F includes a fixed cylinder portion 35 whose outer periphery is engaged and fixed inside the valve body mounting portion 32 of the plug body E, a ring-shaped valve plate 36 that has a gap between the upper end of the inner periphery of the fixed cylinder portion 35 and whose outer edge of the lower surface abuts against the upper end surface of the valve cylinder 30 of the plug body E to block the inside of the valve cylinder 30, and a valve cylinder portion 37 for a sack back that extends vertically from the inner edge of the valve plate 36 and houses a ball valve G so as to be vertically movable inward. The upper end of the inner periphery of the fixed cylinder portion 35 and the outer edge of the valve plate 36 are continuously connected via a plurality of (three in this embodiment at equal intervals) deformable deformation connecting pieces 38 that are spaced apart.

[0020] The valve cylinder portion 37 is formed such that the ball valve G that has moved to the lower surface side of the partition wall 10 of the cap body B abuts against the stop protrusion 14 on the lower surface of the partition wall 10 to stop the movement, and the ball valve G cannot come off between the lower surface of the partition wall 10 and the upper end of the valve cylinder portion 37, and the lower end of the valve cylinder portion 37 is formed at a height that keeps a gap from the upper surface of the bottom wall portion 29 of the plug body E. The lower inner circumference of the valve cylinder portion 37 is provided with a ring-shaped valve seat bottom wall 40 that closes the inner edge opening 40a with the ball valve G, so that the ball valve G does not fall out from below when the ball valve G moves toward the plug body E. Furthermore, above the valve plate 36 of the valve cylinder portion 37, opposing notched window portions 41 are provided at predetermined locations (two locations at 180° intervals in this embodiment), which are located below the horizontal diameter plane of the ball valve G at least as it rises from the upper end, and are notched to an end 41a with a depth that creates a gap between the ball valve G and the inner circumference of the valve cylinder portion 37. It is sufficient that two notched window portions 41 are provided above the valve plate 36 of the valve cylinder portion 37. Furthermore, on the inner circumference of the valve cylinder portion 37, liquid intake grooves 42 are recessed vertically (in this embodiment, at 180° intervals, in two locations) from the inner circumference of the end portion 41a of the notched window portion 41 to a predetermined depth with a width that allows liquid to move. In this embodiment, the liquid intake groove 42 is recessed to a position deeper than the lower end of the range α to the lower end of the ball valve G when the ball valve G moves to the lower surface side of the partition wall 10 of the cap body B (rises to the upper limit). In other words, the liquid intake groove 42 only needs to be recessed to the same position as the lower end of the ball valve G, as shown in Figure 2(b). Furthermore, the liquid intake groove 42 is preferably recessed downward from the height of the end portion 41a to a range γ which is between range α and range β, which is the range from the ball valve G to the upper end of the ball valve G when the ball valve G moves toward the plug body E (down to the lower limit).

[0021] As shown in Figure 1, the top cover D is rotatably connected to the upper outer edge of the outer peripheral wall 11 of the cap body B via a hinge C, and comprises a top wall 45 and a side peripheral wall 46 that extends vertically from the peripheral edge of the top wall 45. A sealing cylinder portion 47 is provided on the lower surface of the top wall 45, which is inserted into the inner circumference of the discharge cylinder 12 of the cap body B when the lid is closed, and seals the opening. At the lower end of the side circumferential wall 46, an engaging recess 48 is provided on the inner circumference that engages with the lid engaging portion 23 of the cap body B to maintain the closed lid state, and a knob portion 49 is provided protruding from the discharge side of the outer circumference.

[0022] Next, the usage and effects of this embodiment will be described. In this embodiment, a relatively viscous liquid, such as edible oil, is filled into the inner container A2 of the double-walled container A. In this embodiment, the hinged cap is first integrally molded with the cap body B and the top lid D in the open position via the hinge C. Then, the top lid D is rotated around the hinge C and placed over the cap body B, and the engaging recess 48 of the top lid D is fitted into the lid engaging portion 23 of the cap body B to bring it into the closed position. At that time, the sealing cylinder portion 47 of the top lid D is inserted into the inner circumference of the discharge cylinder 12 of the cap body B, sealing the inside of the discharge cylinder 12.

[0023] Next, after setting the valve body F inside the plug body E, the ball valve G is set inside the valve cylinder portion 37 of the valve body F, and the plug body E is attached from below the cap body B with the top cover D closed. At that time, the outer circumference of the fixing cylinder portion 35 of the valve body F fits into the valve body mounting portion 32 on the inner circumference of the mounting cylinder portion 28 of the plug body E, fixing the valve body F inside the plug body E, and the lower outer edge of the valve plate 36 of the valve body F comes into contact with the upper end surface of the valve cylinder 30 of the plug body E (in this embodiment, it comes into close contact due to the biasing force of the deformable connecting piece 38). Furthermore, the ball valve G comes into contact with the valve seat bottom wall 40 at the lower end of the inner circumference of the valve cylinder portion 37 of the valve body F, closing the opening 40a and sealing the inside of the valve cylinder 30. Furthermore, the upper surface and outer circumference of the mounting flange portion 25 of the plug body E engage with the plug body mounting portion 18 on the lower outer edge of the partition wall 10 and the inner circumference of the outer peripheral wall 11 of the cap body B, and the inner cylinder 15 of the cap body B is inserted into the inner circumference of the mounting cylinder portion 28 of the plug body E, thereby sealing the inside of the mounting cylinder portion 28.

[0024] Finally, when the cap body B, which has the stopper body E and valve body F set inside, is pressed into the mouth section 1 of the double container A, which is filled with liquid contents in the inner container A2, the shape of the threaded portion (male thread) 5 is transferred to the inside of the vertical rib 19 of the cap body B, and the threaded groove formed in the vertical rib 19 engages with the threaded portion (male thread) 5 of the double container A, thereby attaching and closing the lid to form a discharge container. At that time, the screw grooves formed in the vertical ribs 19 on the inner circumference of the outer peripheral wall 11 of the cap body B engage with the screw portion (male thread) 5 on the outer circumference of the mouth portion 1 of the outer container A1, and the locking projection 6 on the outer circumference of the mouth portion 1 fits into the container locking portion 20 on the inner circumference of the outer peripheral wall 11, thereby securing the cap body B to the double container A so that it does not come off. Furthermore, the outer circumference of the sealing cylindrical portion 26 of the stopper body E is inserted into the upper inner circumference of the inner container A2, sealing the inside of the inner container A2. At the same time, the end portion 4 of the inner container A2 is sandwiched between the lower surface of the mounting flange portion 25 and the upper end surface 3 of the mouth cylindrical portion 1 of the outer container A1, thereby preventing the inner container A2 from detaching and coming off the outer container A1. In this embodiment, the hinged cap is attached to the mouth section 1 of the double-walled container A by pressing it in. Alternatively, the female threaded portion on the outer peripheral wall 11 of the cap body B may be screwed onto the male threaded portion 5 threaded onto the mouth section 1.

[0025] To use the liquid contents inside the double container A, place your fingers on the tab 49 of the top lid D and pull it up, disengage the engagement recess 48 of the top lid D from the lid engagement portion 23 of the cap body B, rotate the top lid D around the hinge C and lift it up, and open it relative to the cap body B as shown in Figure 3.

[0026] After opening the cap, tilting the double container A and squeezing the body of the outer container A1 causes the liquid contents in the inner container A2 to pass through the flow channel opening 29a of the bottom wall portion 29 of the stopper body E, pushing up from below the lower surface of the valve plate 36 and the valve cylinder portion 37 of the valve body F. When the valve plate 36 is pushed up by deforming the deformable connecting piece 38 relative to the stopper body E, the lower surface of the valve plate 36 and the upper end of the valve cylinder 30 of the stopper body E separate, and the liquid contents flow through the gap between the inner circumference of the fixed cylinder portion 35, the outer circumference of the valve plate 36, and the deformed deformable connecting piece 38, into the space between the inner surface of the mounting cylinder portion 28, the upper surface of the valve plate 36, and the lower surface of the partition wall 10 of the cap body B.

[0027] Furthermore, when the liquid contents flow in from below the valve cylinder 37, the ball valve G that closes the opening 40a of the valve seat bottom wall 40 is pushed up from below and rises within the valve cylinder 37, and the liquid contents flow into the valve cylinder 37 through the opening 40a. Finally, as shown in Figure 3, the ball valve G comes into contact with the stop projection 14 of the cap body B, stopping its upward movement. The liquid inside flows out of the valve body 37, through the gap between the lower part of the ball valve G and the inner circumference of the valve cylinder 37, and through the liquid intake groove 42, passing near the end 41a of the notched window 41. It then flows into the space between the inner surface of the mounting cylinder 28, the upper surface of the valve plate 36, and the lower surface of the partition wall 10 of the cap body B.

[0028] The liquid contents that flow into the space inside the mounting cylinder 28 pass through the discharge port 10a of the partition wall 10 of the cap body B, are guided into the discharge cylinder 12, and are discharged from the tip of the discharge cylinder 12 to the outside in an amount equal to the amount that squeezes the body of the outer container A1.

[0029] When the squeeze of the double container A is released, the pressure of the liquid contents is eliminated, dispensing from the tip of the dispensing nozzle 12 stops, the outer container A1 attempts to return to its original shape, followed by the inner container A2, and the liquid contents are sucked back. First, when the pressure from the liquid inside is released, the valve plate 36 of the valve body F descends due to the restoration of the deformed connecting piece 38, and as shown in Figure 4, it comes into contact with the upper end surface of the valve cylinder 30 of the stopper body E, creating a tight seal and eliminating any gaps, thereby sealing the inside of the valve cylinder 30.

[0030] In this embodiment, as shown in Figure 4, a notched window 41 is provided at the top of the valve cylinder portion 37 of the valve body F, forming a flow path connecting the inside and outside. Therefore, even if the gap between the outer circumference of the ball valve G and the inner circumference of the valve cylinder portion 37 is blocked by the viscosity of the liquid contents, a flow path is maintained between the outer circumference of the ball valve G and the inner circumference of the valve cylinder portion 37 through the notched window 41. This does not hinder the drawing of the liquid contents into the valve cylinder portion 37, and allows the liquid contents outside the valve cylinder portion 37 to be quickly drawn in.

[0031] When the liquid contents above the ball valve G are drawn in, the resistance between the outer circumference of the ball valve G and the inner circumference of the valve cylinder 37 due to viscosity is eliminated, and the ball valve G descends inside the valve cylinder 37 due to suck-back, and finally, as shown in Figure 1, it comes into contact with the valve seat bottom wall 40, closing the opening 40a and sealing the inside of the valve cylinder 30. The sealing between the ball valve G, the valve seat bottom wall 40, the valve plate 36, and the valve cylinder 30 prevents the liquid contents from being drawn in from the inside of the valve cylinder 30 into the inside of the inner container A2.

[0032] In this embodiment, as shown in Figure 4, a liquid intake groove 42 is recessed in the inner circumference of the valve cylinder portion 37 of the valve body F, along with a notched window portion 41. Therefore, even if the gap between the ball valve G, which has descended into the inner circumference of the valve cylinder portion 37, and the inner circumference of the valve cylinder portion 37 is blocked by the viscosity of the liquid inside, the liquid inside can be drawn into the gap created by the liquid intake groove 42, allowing for stable and rapid intake of the liquid inside. Even if the liquid contents are somewhat viscous and become entangled in the ball valve G, hindering its movement or blocking the gap with the inner circumference of the valve cylinder 37, the notched window 41 and liquid draw-in groove 42 allow the liquid contents to be quickly drawn downwards from the inside of the valve cylinder 37, regardless of the movement of the ball valve G. The liquid contents remaining near the discharge port 10a of the small-diameter cap body B and the partition wall 10 are quickly drawn in, preventing them from drying out and blocking the opening or forming a film of liquid contents.

[0033] Furthermore, as shown in Figure 2, the liquid intake range can be adjusted by setting the liquid intake groove 42 to a depth between ranges γ. Incidentally, if the liquid intake groove 42 is recessed up to range β, there is a risk that the liquid will be drawn in excessively, and outside air may also be drawn into the inner container A2 in addition to the liquid. Furthermore, if the liquid intake groove 42 is recessed within range α, the intake from the liquid intake groove 42 will be completed in a short time, leaving the liquid contents above the ball valve G, blocking the gap, and preventing the liquid contents from being sufficiently drawn back down to the valve cylinder portion 37.

[0034] When the draw-in of the liquid contents into the inner container A2 stops, the liquid contents do not return to the inner container A2. As a result, the inner container A2 cannot follow the restoration of the outer container A1. Outside air is then introduced through the outside air inlet 7 of the outer container A1 and the ventilation groove 21 of the cap body B, causing only the outer container A1 to return to its initial state, leaving the reduced volume of the inner container A2 behind. When only the outer container A1 returns to its initial state, no excessive outside air is introduced between the outer container A1 and the reduced-volume inner container A2.

[0035] In this embodiment, when the suck-back of the liquid contents is complete, the hinge cap seals the ball valve G, the valve seat bottom wall 40, the valve plate 36, and the valve cylinder 30, stopping the draw of liquid contents from the inside of the valve cylinder 30 into the inside of the inner container A2, thereby preventing outside air from entering from the valve cylinder 30. [Industrial applicability]

[0036] The cap of the present invention is particularly suitable as a cap for double-walled containers that contain edible oil and the like, because it allows for good liquid drainage after use, draws any remaining liquid inside the outlet into the cap, and prevents a film from forming on the outlet, even when the contents are relatively viscous, such as cooking oil, stored in a double-walled container. [Explanation of Symbols]

[0037] A Double container A1 Outer container A2 Inner container B Cap Body C Hinge D Top lid E Plug body F valve body G Ball Valve α, β, γ range 1 Mouth barrel 3 Top surface 4 ends 5. Threaded section (male thread) 6. Locking protrusion 7. Outside air intake 10 Bulkhead 10a outlet 11 Peripheral wall 12 Discharge tube 14 Stop protrusion 15 Inner cylinder 18 Plug mounting section 19 Vertical Ribs 20 Container locking part 21 Ventilation groove 23 Lid engaging part 25 Mounting flange section 26. Close-fitting cylindrical section 27 Inclined cylinder part 28 Mounting cylinder section 29 Bottom wall section 29a Channel mouth 30 Valve cylinder 32 Valve body mounting section 35 Fixed cylinder part 36 valve plate 37 Valve cylinder part 38 Deformed connecting piece 40 Valve seat base wall 40a opening 41 Notched window section 41a End 42 Liquid intake groove 45 Top Wall 46 Side walls 47 Seal cylinder section 48 Engagement recess 49. Thumb part

Claims

1. A cap comprising: a cap body fitted to a double-walled container and having a discharge port for dispensing the contents; an upper lid for opening and closing the discharge port of the cap body; a stopper body fitted between the cap body and the double-walled container and having a flow path in which it communicates with the double-walled container; and a valve body fitted between the cap body and the stopper body and for opening and closing the flow path between the cap body and the stopper body, The valve body is connected to the discharge port and has a valve cylinder section inside that houses a ball valve so that it can move up and down. The valve cylinder portion of the cap is characterized by comprising a notched window portion into which the liquid contents can flow when the ball valve rises to its upper limit, and a liquid intake groove recessed downward from the inner circumference of the notched window portion.

2. The stopper body comprises a mounting cylinder portion suspended from the cap body, a bottom wall portion extending inward from the lower end of the mounting cylinder portion and having a flow channel opening, and a valve cylinder erected from the bottom wall portion. The cap according to claim 1, characterized in that the valve body has a valve plate whose peripheral edge is attached to the mounting cylinder portion of the plug body, which contacts the upper end surface of the valve cylinder in an openable and closable manner by elastic deformation, and whose inner edge is connected to the valve cylinder portion.

3. The cap according to claim 1 or 2, characterized in that the liquid intake groove is recessed at least to the lower end position of the ball valve when the ball valve rises to its upper limit within the valve cylinder portion.

4. The cap according to claim 3, characterized in that the liquid intake groove is recessed to a position higher than the upper end position of the ball valve when the ball valve has descended to its lower limit within the valve cylinder.

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