JPH1086954A - Sealing structure for cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a highly reliable cap-sealing structure which is small in torque in the opening/closing of a measuring cap, has sufficient airtightness, and prevents liquid dripping, by pressing the outside surface of the front end of a measuring tube part against the inner-wall surface of a liquid-recovering part when attaching the measuring cap to a main body, thereby obtaining its firm contact with it. SOLUTION: When a measuring cap 7 is attached to a main body cap 5, the outside surface 6a of the front end of a measuring tube part 6 is brought into firm contact with the inner-wall surface of a liquid recovering part 4, that is, the inner-wall surface 9a of a tube part 9 by being pressed against it. Here, by setting the size of the outside diameter of the measuring tube part 6 larger than that of the inside diameter of the tube part 9, the outside surface 6a of the front end of the measuring tube 6 is strongly pressed to the inner-wall surface 9a of the tube part 9, so that highly firm contact can be obtained. Further, resistance when the cap 7 is fitted on can be reduced by giving the part where it comes into firm contact with the outside 6a of the front end of the liquid recovering part 4 the form of a tapering inclined-face. Thus, a highly reliable sealing structure which is small in torque in the opening/closing of the cap and has sufficient airtightness is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing structure for a cap comprising a main body cap and a measuring cap attached to, for example, the mouth of a hollow bottle.

[0002]

2. Description of the Related Art For example, as shown in FIG. 4, a two-piece cap composed of a main body cap 103 and a measuring cap 104 is attached to a mouth 102 of a hollow bottle 101 containing a liquid.

[0003] The main body cap 103 is provided with the hollow bottle 1.
No. 01 has a female screw portion 106 to be screwed into a male screw portion 105 provided on the mouth portion 102, and the female screw portion 106 is attached to the mouth portion 102 by screwing the female screw portion 106 into the male screw portion 105.

[0004] The main body cap 103 has a spout 1 for pouring a liquid contained in the hollow bottle 101.
07 is provided. Around the spout 107, the liquid poured from the spout 107 is filled with a measuring cap 1.
In order to make it easy to pour into the tube 04, a cylindrical pouring guide member 108 having a cutout is provided.

The main body cap 103 is provided with a liquid collecting portion 109 for collecting the liquid dripping from the pouring guide member 108 and the measuring cap 104.
08 is provided around the outside. A circular liquid recovery hole 110 for returning the recovered liquid into the hollow bottle 101 is formed at the bottom of the liquid recovery unit 109.

Further, the main body cap 103 is provided with a male screw portion 111 which is screwed with the measuring cap 104. The male screw portion 111 is attached to the main body cap 103.
Is provided on the outer wall surface at the upper end.

On the other hand, the measuring cap 104 has a female screw portion 112 which is screwed into a male screw portion 111 provided on the main body cap 103, and the female screw portion 112 is connected to the male screw portion 1.
11, the main body cap 103
Attached to.

[0008] The measuring cap 104 is provided with a measuring cylinder 113 for measuring the liquid poured from the spout 107. A scale for measuring the volume of the liquid is provided on the inner wall surface of the measuring cylinder 113.

The measuring cap 104 has a cylindrical portion 114 (hereinafter referred to as an inner ring) which is pressed against and adheres to the inner wall surface 103a at the upper end portion of the main body cap 103 in order to obtain a sealing property with the main body cap 103. 114). Such inner ring 114
Is, for example, 2-5 mm in length and 0.6-1.
The outer diameter is about 2 mm.
0.2 to 0.7 with respect to the inner diameter of the upper end inner wall surface 103a.
mm, the inner wall surface 10
3a is pressed to obtain hermeticity.

[0010]

By the way, in order to further improve the airtightness in the above configuration, it is necessary to increase the pressing force of the inner ring 114 against the inner wall surface 103a at the upper end. However, when the pressing force is increased, both the tightening torque at the time of screwing the measuring cap 104 to the main body cap 103 and the opening torque at the time of loosening the measuring cap 104 increase, resulting in a decrease in usability.

Also, as shown in FIG.
When the liquid 115 stored in the measuring cap 104 is a liquid detergent or the like, an internal pressure is generated in the container due to a change in the outside air temperature or the like.
In the case where the liquid 115 stays between the inner wall of the liquid collecting unit 109 of FIG. 03 and the pressure inside the container when the measuring cap 104 is opened, the staying liquid 115 is pushed out and foamed as cap. It may stain the outer wall.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a highly reliable cap sealing structure which has a small torque when opening and closing the cap, has sufficient hermeticity and does not cause dripping.

[0013]

According to the first aspect of the present invention,
In a cap sealing structure comprising a main body cap having a spout and a liquid collecting portion attached to a mouth portion of a hollow bottle, and a measuring cap having a measuring tube portion screwed and attached to the main body cap, A cap sealing structure, characterized in that when a measuring cap is attached to the main body cap, the outer end of the distal end of the measuring cylinder is pressed against and tightly attached to the inner wall surface of the liquid collecting section. As a result, the above object has been achieved.

According to a second aspect of the present invention, the outer diameter D _{1 on the} outer surface of the distal end of the measuring cylinder is equal to the inner diameter D ₂ of a portion of the liquid collecting portion in close contact with the outer surface of the distal end of the measuring cylinder. respect, by providing a sealing structure of a cap according to claim 1, characterized in that the D _1> D _2, is obtained by achieving the above object.

According to a third aspect of the present invention, the outer diameter D ₁
-The above object has been achieved by providing the cap sealing structure according to claim _{2, wherein the} inner diameter dimension D2 is 0.1 to 1.0 mm.

According to a fourth aspect of the present invention, the outer peripheral end of the measuring cylinder has an R-shape or an inclined surface, and the portion of the liquid collecting portion that is in close contact with the outer peripheral end of the measuring cylinder has an inclined surface. The above object has been achieved by providing a cap seal structure according to claim 1, 2 or 3.

According to a fifth aspect of the present invention, when the measuring cap is attached to the main body cap, a cylindrical portion which is pressed against and adheres to the inner wall surface at the upper end of the main body cap is formed on the measuring cap. Claims 1 to
The above object has been attained by providing the cap sealing structure according to any one of the items (4) to (4).

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a cap sealing structure to which the present invention is applied will be described in detail with reference to the drawings.

FIG. 1 is a cross-sectional view showing a seal structure of a cap according to the present embodiment. FIG. 2 is a sectional view showing an outer diameter of a tip outer surface of a measuring cylinder portion of a measuring cap and a contact portion between the liquid collecting portion and the tip outer surface. FIG. 3 is a sectional view of a main part showing a relationship with an inner diameter.
(A) is a main part enlarged cross-sectional view showing an example in which the tip outer surface of the measuring cylinder portion is formed into an R shape, and a portion of the liquid recovery portion that is in close contact with the tip outer surface is formed as an inclined surface; It is a principal part expanded sectional view which shows the example which made the front-end | tip outer surface the inclined surface, and made the part of the liquid collection part which adhere | attached the said front-end | tip outer surface the inclined surface. Note that FIG.
In the figure, the outer surface of the distal end of the measuring cylinder portion and the portion of the liquid collecting portion that is in close contact with the outer surface of the distal end are displayed in an overlapping manner, and the interference in these tight contact portions is shown.

As shown in FIG. 1, the sealing structure of the cap according to the present embodiment includes a main body cap 5 having a spout 3 and a liquid recovery unit 4 attached to the mouth 2 of the hollow bottle 1.
And a measuring cap 7 having a measuring tube portion 6 which is screwed and attached to the main body cap 5.

The main body cap 5 has an annular body 8 attached to the outer periphery of the mouth portion 2 of the hollow bottle 1, and a cylindrical portion 9 having a bottomed cylindrical shape facing the inside of the mouth portion 2 of the hollow bottle 1. Are integrally formed.

On the inner wall surface of the annular body 8, the hollow bottle 1 is provided.
Female screw 11 screwed with male screw 10 provided in the mouth 2
Is provided. Therefore, the main body cap 5 is attached to the mouth 2 of the hollow bottle 1 by screwing the female screw 11 to the male screw 10. The main body cap 5 and the hollow bottle 1 are sealed by a seal member 12 formed as an annular member having a substantially U-shaped cross section attached to the upper end of the mouth 2.

The outer wall of the upper end of the annular body 8 has
A male screw 14 that is screwed with a female screw 13 provided on the measuring cap 7 is provided. The measuring cap 7 is attached to the main body cap 5 by screwing the female screw 13 to the male screw 14.

A spout 3 for pouring a liquid such as a liquid detergent contained in the hollow bottle 1 is provided at the bottom of the cylindrical portion 9 as a low-height cylindrical shape. Around the spout 3, a tubular notch guide member 15 having a cutout is provided for facilitating the pouring of the liquid poured from the spout 3 into the measuring cap 7. Is provided. The pouring guide member 15 is provided with the main body cap 5.
Is formed to a position even higher than the upper end portion.

The pour guide member 1 is provided in the cylindrical portion 9.
A liquid recovery unit 4 for recovering the liquid that drips from the measuring cap 5 and the measuring cap 7 is provided. The liquid recovery section 4 is formed as a ring-shaped void in a portion sandwiched between the pouring guide member 15 and the inner wall of the cylindrical section 9. The liquid collected here is returned to the accommodation portion of the hollow bottle 1 through a circular liquid collection hole 16 formed in the bottom surface of the cylindrical portion 9.

On the other hand, the measuring cap 7 is formed integrally with a measuring cylinder portion 6 having a bottomed cylindrical shape and an annular screwdriver portion 17 provided at a substantially intermediate position of the measuring cylinder portion 6. Structure.

The screw driver 17 is integrated with the outer wall surface of the measuring cylinder portion 6 and has a female screw portion 13 screwed with the male screw portion 14 of the main body cap 5 on the inner surface. When the measuring cap 7 is attached to the main body cap 5, the screwdriver 17 has a cylindrical portion 19 (hereinafter referred to as an inner ring portion 19) which presses and adheres to the inner surface 18 at the upper end of the main body cap 5. Is provided).

The inner ring portion 19 serves to seal the liquid that drips from the pouring guide member 15 and the measuring cap 7 so as not to leak out of the cap. Is formed in such a size as not to cause the above-mentioned problem and in such a size that a reliable sealing can be performed.

The dimensions satisfying the above conditions are as follows. The length of the screw driver 17 from the inner surface at the upper end portion is 2 to 5 mm, the thickness is 0.6 to 1.2 mm, and the outer diameter of the inner ring portion 19 indicates that the main body cap is in contact with the inner ring portion 19. The value obtained by subtracting the inner diameter of No. 5 was 0.2 to 0.7 mm.

The measuring cylinder 6 is for measuring the liquid poured from the spout 3 and is formed as a bottomed cylinder. A scale for measuring the volume of the liquid is provided on the inner wall surface of the measuring cylinder 6.

When the measuring cap 7 is attached to the main body cap 5, the measuring cylinder 6 faces the liquid collecting section 4, and the tip of the measuring cylinder 6 reaches near the bottom of the liquid collecting section 4. It is made to be provided in. In particular, in the present embodiment, when the measuring cap 7 is attached to the main body cap 5, the tip outer surface 6 a of the measuring cylinder 6 is connected to the inner wall surface of the liquid recovery unit 4, specifically, the cylinder 9. The inner wall surface 9a is pressed and adhered to the inner wall surface 9a to seal such a portion.

As shown in FIG. 2, the outer diameter dimension D ₁ of the outer peripheral surface 6a of the measuring cylinder 6 is equal to the inner diameter of the cylindrical portion 9 at the portion in close contact with the outer peripheral surface 6a of the measuring cylinder 6. relative to the size D _2, there is a D _1> D ₂ the relationship. That is, the outer diameter D ₁ of the metering cylinder portion 6 is set to be greater than the inner diameter D ₂ of the tubular portion 9,
The distal end outer surface 6a of the measuring tube portion 6 is strongly pressed against the inner wall surface 9a of the tube portion 9 to obtain close contact.

The difference between the outer diameter D ₁ and the inner diameter D ₂ , that is, the outer diameter D ₁ −the inner diameter D ₂ is:
It is preferably 0.1 to 1.0 mm. 0.1mm
If less than 1.0 mm, the sealing function becomes unstable,
If it is excessive, both the tightening torque and the opening torque at the time of loosening increase, which causes a decrease in usability.

As shown in FIGS. 3 (a) and 3 (b), the outer peripheral surface 6a of the measuring cylinder 6 has an R-shaped or inclined surface, and the liquid collecting portion is in close contact with the outer peripheral surface 6a. The portion of the portion 4 (the inner wall surface 9a of the cylindrical portion 9) is an inclined surface. The tip outer surface 6a of the measuring cylinder 6 has an R-shaped or tapered outward surface so that the measuring cap 7 can be easily incorporated into the main body cap 5. In addition, a portion of the liquid recovery unit 4 that is in close contact with the distal end outer surface 6a is an inclined surface that is tapered inward to reduce resistance when the measuring cap 7 is assembled.

The radius of curvature of the tip outer surface 6a of the measuring cylinder 6 and the inclination angle θ ₁ of the inner wall 9a of the cylinder 9 in FIG. 3A, and the tip of the measuring cylinder 6 in FIG. Both the inclination angle θ ₂ of the outer side surface 6a and the inclination angle θ ₃ of the inner wall surface 9a of the cylindrical portion 9 reduce the resistance when the measuring cap 7 is assembled into the main body cap 5 and fit for sealing at the close contact portion. The curvature and the inclination angle θ ₁ are determined in order to stably obtain the joint (the seal portion is in contact with the entire circumference evenly, and there is no portion that does not partially contact). , too small even if the theta ₂ and theta ₃ too large, the two effects there is a possibility not be obtained.

The tip of the measuring cylinder 6 in FIG.
The radius of curvature of the outer side surface 6a is preferably about R5.
And the inclination angle θ of the inner wall surface 9a of the cylindrical portion 9 at that time.₁Is
It is preferable that the angle is about 10 degrees. In addition, FIG.
Angle θ of the tip outer surface 6a of the measuring cylinder 6_TwoWhen
The inclination angle θ of the inner wall surface 9a of the cylindrical portion 9_ThreeIs θ_Two≧ θ
_ThreeAnd θ_TwoFrom 5 to 25 degrees, θ_Three5 degrees to 1
Preferably it is 5 degrees.

According to the cap sealing structure constructed as described above, the outer end surface 6a of the measuring cylinder 6 is pressed against the inner wall surface 9a of the cylinder 9 so as to be brought into close contact therewith.
It is possible to provide a highly reliable cap sealing structure that has a small torque at the time of opening and closing the cap and has sufficient hermeticity and does not cause dripping. Further, even when the hollow bottle 1 was turned over, the liquid did not enter between the outside of the measuring cylinder 6 and the inner wall of the liquid collecting part 4 of the main body cap 5 when the inverted bottle was turned over, so that the measuring cap 7 was opened. Occasionally, the liquid does not leak out and stain the outer wall of the cap.

Further, in the seal structure of the cap according to the present embodiment, in addition to the seal on the outer surface 6a at the tip end of the measuring cylinder 6, the seal on the inner ring 19 is also performed. Properties can be further improved. Further, an increase in torque when opening and closing the cap can be suppressed as compared with the case where the sealing strength of the inner ring portion 19 alone is increased as in the conventional seal structure of the cap shown in FIG. In the present embodiment, the torque at the time of opening and closing the cap can be set to 20 kgcm or less which does not cause a decrease in usability.

Further, according to the cap sealing structure of the present embodiment, a remarkable effect can be obtained by simple modification of the mold as compared with the conventional cap shown in FIG.

The seal structure of the cap to which the present invention is applied is not limited to the above embodiment, and can be appropriately changed without departing from the gist of the present invention. For example,
In the above-described embodiment, in order to prevent liquid leakage, in addition to sealing at the tip outer surface 6a of the measuring cylinder portion 6, sealing is also performed at the inner ring portion 19, that is, so-called double sealing is performed to improve the reliability of the liquid sealing. However, in the present invention, it is sufficiently effective to seal only the outer surface 6a of the distal end of the measuring cylinder 6 alone.

Further, the shapes of the main body cap 5 and the measuring cap 7 other than the above-mentioned sealing portion are not limited to the above-described embodiment, and may be determined as appropriate according to the design and functions.

[0042]

As is apparent from the above description, according to the seal structure of the cap of the present invention, the torque at the time of opening and closing the cap is small, and the reliability with sufficient sealing performance and no dripping is generated. A high cap sealing structure can be provided. Also, even when the hollow bottle is turned over, liquid does not enter between the outside of the measuring cylinder and the inner wall of the liquid collecting section of the main unit cap when the bottle is inverted, so that the liquid leaks when the measuring cap is opened. It does not come out and stain the outer wall of the cap.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a seal structure of a cap according to an embodiment.

FIG. 2 is a cross-sectional view of a main part showing a relationship between an outer diameter of a tip outer surface of a measuring cylinder portion of a measuring cap and an inner diameter of a liquid collecting portion at a contact portion with the tip outer surface.

FIG. 3 (a) shows an R-shaped outer surface at the tip of a measuring cylinder portion,
An enlarged sectional view of a main part showing an example in which a portion of a liquid collecting portion that is in close contact with the outer surface of the tip is an inclined surface, and FIG. It is a principal part expanded sectional view which shows the example which made the part of the collection | recovery part an inclined surface.

FIG. 4 is a cross-sectional view showing a conventional cap sealing structure.

FIG. 5 is a cross-sectional view of a main part showing how liquid leakage occurs when a hollow bottle is turned over in a conventional cap sealing structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hollow bottle 2 Mouth part 3 Spout part 4 Liquid recovery part 5 Main body cap 6 Measuring cylinder part 6a Outer end surface of measuring cylinder part 7 Measuring cap 9a Inner wall surface of cylinder part 9

Claims (5)

[Claims] 1. A cap comprising a main body cap having a spout portion and a liquid collecting portion attached to a mouth portion of a hollow bottle, and a measuring cap having a measuring cylinder portion screwed and attached to the main body cap. In the seal structure, when the measuring cap is attached to the main body cap, a tip outer surface of the measuring cylinder portion is pressed against an inner wall surface of the liquid collecting portion so as to be in close contact with the inner wall surface of the liquid collecting portion. Construction. Wherein the outer diameter D ₁ at the distal outer surface of the metering cylinder portion, of the liquid recovery section, with respect to an inner diameter D ₂ at a portion in close contact with the tip outer surface of the metering cylinder portion, D ₁ >
_2. The seal structure for a cap according to claim 1, wherein D2 is D2. 3. The cap sealing structure according to claim 2, wherein the outer diameter dimension D ₁ -the inner diameter dimension D ₂ is 0.1 to 1.0 mm. 4. The liquid collecting section according to claim 1, wherein the outer surface of the distal end of the measuring cylinder portion has an R shape or an inclined surface, and a portion of the liquid collecting portion which is in close contact with the outer surface of the distal end is an inclined surface. 4. The cap sealing structure according to 1, 2, or 3. 5. The measuring cap according to claim 1, wherein when the measuring cap is attached to the main body cap, a cylindrical portion which is pressed against and adheres to the inner wall surface at the upper end of the main body cap is formed. The cap sealing structure according to any one of claims 1 to 4.