JP2011255925A - Hinged cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinge cap suitably preventing dirt at the outer periphery of a spout of a cap body with a liquid content, which is caused by the repeated opening/closing of plug of an upper lid.SOLUTION: Arcuate top plate ribs 24a and 24b are concentrically provided on the internal surface of a top plate portion on the radially outside of the inner ring 21 of the upper lid 2. Meanwhile, arcuate skirt ribs 25a and 25b are concentrically and parallely provided on the internal wall face of a skirt portion 22. The outer top plate rib 24b is disposed on the internal surface of the top plate portion so that the outermost radial direction distance r< the outermost radial direction distance R of the open end of a spout cylinder 15 is satisfied.

Description

  The present invention relates to a hinge cap, and in particular, to a hinge cap that can suitably prevent contamination due to the liquid content around the spout of a cap body due to repeated opening and closing plugs of an upper lid.

A so-called reclose in which a cap body serving as a spout for the liquid content and a top lid for closing the spout are hinged as a cap for a container for storing seasonings such as soy sauce and vinegar, cooking oil, salad dressing, etc. Hinged caps are widely used.
These hinge caps have, for example, a dome structure in which the inner surface of the top plate in the inner ring radial direction is curved in a dome shape so that liquid does not drip from the inner surface of the upper lid or the spout, or the spout is directed toward the outlet. The taper structure expands in diameter.
As another dripping prevention mechanism for the recloseable hinge cap, a dripping prevention cap is known in which trapezoidal liquid slices are arranged at regular intervals along the inner surface of the inner surface of the inner ring in the radial direction. (See Patent Document 1).
Similarly, as a mechanism for preventing dripping of the recloseable hinge cap, the liquid reservoir pieces having a shape in which the radial length is shortened as the distance from the top plate is reduced and the radial distance from the peripheral wall is shortened so that they are parallel to each other. There is known a dispensing cap disposed on the inner wall surface of the inner ring on the hinge side (see Patent Document 2).
Also, a dispensing cap is known in which liquid reservoir pieces are concentrically arranged on the inner wall surface and the radially inner side of the upper lid inner ring (see Patent Document 2).
Similarly, a liquid pouring cap in which a plurality of arc-shaped walls, spiral-shaped walls, or lattice-shaped walls are disposed on the inner side in the inner ring radial direction of the upper lid is known as a liquid dripping prevention mechanism for a recloseable hinge cap (patent) (See reference 3.)
By the way, among the hinge caps, there is a recloseable hinge cap that prevents water from entering the upper lid with respect to the shower process.
As shown in FIG. 5, such a hinge cap includes a seal portion A formed by tightly engaging the pouring cylinder 15 of the cap body 1 and the inner ring 21 of the upper lid 2, and the circumferential shape of the cap body 1. A so-called double seal called a seal portion B formed by fitting the protrusion 16 and the skirt portion 22 of the upper lid 2 is formed. By this double seal, two independent sealing zones S1, S2 are formed inside the hinge cap.
After the pull ring 13 is pulled up, the score 12 is broken and the panel 11 is opened, the sealing zone S1 communicates with the inside of the container (head space) and becomes a part of the spout from which the content liquid flows out. For this reason, every time the upper lid 2 is repeatedly opened and closed, the content liquid adheres to the sealing zone S1, particularly the inner peripheral surface of the dispensing cylinder 15 and the inner surface of the top plate.
The inventor of the present application, as a result of earnestly studying the mechanism relating to the contamination of the outer periphery of the spout associated with the opening and closing plug of the upper lid in the hinge cap having the double seal, as a result of the negative effect of the sealing zone S2 when opening the upper lid. The pressure (vacuum effect) causes the content liquid to be sucked out of the sealing zone S1, adheres to the inner surface of the inner ring 21 radially outside located on the extension line, and repeats the opening / closing stopper of the upper lid 2. The adhering content liquid flows downward along the inner wall surface of the skirt portion 22, and finally enters a portion that fits with the circumferential protrusion 16 of the cap body 1, and when closing the upper lid 2, It has been found that the content liquid scatters and soils around the pouring cylinder 15, and the adhered content liquid becomes priming water when the content liquid is poured from the pouring cylinder 15 and induces dripping.
FIG. 6 is an explanatory view showing a mechanism (vacuum effect) related to the suction of the content liquid that occurs when the upper lid of the hinge cap is opened. 6 (a) shows the sealing zones S1 and S2 at the beginning of opening of the upper lid 2, and FIG. 6 (b) shows the sealing zones S1 and S2 immediately before the sealing performance of the seal portion A breaks. ) Shows the sealing zones S1 and S2 immediately after the sealing performance of the seal portion A breaks.
When the upper lid 2 of the hinge cap is opened, the seal portion A is the first portion of the seal portions A and B where the sealing performance breaks. That is, the sealing performance of the seal portion B is delayed with respect to the seal portion A.
As the upper lid 2 is opened (FIG. 6 (a)), the volumes V1, V2 of the sealing zones S1, S2 both increase. However, comparing the ratios ΔV1 / V1 and ΔV2 / V2 of the volume increments ΔV1 and ΔV2 to the total volume, the sealing zone S1 vents inside the container (not shown), so the ratio ΔV1 / V1 is almost negligible ( In other words, it can be regarded as V1≈constant).
In general, it is known that the product of pressure (P) and volume (V) shows a constant correlation (PV = constant) in a sealed container having a constant temperature. From this correlation, the pressure hardly changes in the sealing zone S1.
Meanwhile, since the sealing zone S2, the original small volume V2, can not be ignored rate [Delta] V2 / V2 to the entire volume of the volume increment [Delta] V _2, therefore, also the pressure change [Delta] P ₂ due to the volume increase [Delta] V ₂ It cannot be ignored. Therefore, from the above correlation (PV = constant), the pressure P _{2 in the} sealing zone S ₂ decreases conversely as the upper lid 2 is opened.
Incidentally, the initial pressure P2 in the sealing zone S2 is equal to the atmospheric pressure, and the pressure P1 in the sealing zone S1 is equal to a constant value obtained by adding the “saturated vapor pressure of the content liquid” to the atmospheric pressure. That is, in the initial state, the pressure P2 in the sealing zone S2 is lower than the pressure P1 in the sealing zone S1 by an amount corresponding to the saturated vapor pressure of the content liquid (negative pressure state). Immediately before the sealing performance of the seal portion A breaks (FIG. 6 (b)), the pressure drop amount ΔP2 in the sealing zone S2 is further increased, so that the degree of negative pressure with respect to the sealing zone S1 is further increased.
Therefore, the degree of the negative pressure becomes maximum immediately after the seal portion A breaks. Therefore, as shown in FIG. 6 (c), when the sealing performance of the sealing portion A breaks, the liquid content is sucked out from the sealing zone S1 to the sealing zone S2 by the negative pressure (vacuum effect), and on the extension line. It comes to adhere to the inner surface of the top plate portion on the radially outer side of the positioned inner ring 21. Thus, each time the upper lid 2 is opened, the content liquid adheres to the inner surface of the top plate portion on the radially outer side of the inner ring 21, and finally flows downward along the inner wall surface of the skirt portion 22 of the upper lid 2. The main body 1 enters the fitting portion with the circumferential protrusion 16.
The content liquid that has entered the fitting portion scatters and adheres to the outer peripheral surface of the dispensing cylinder 15 every time the upper lid 2 is closed. The content liquid adhering to the outer peripheral surface of the dispensing cylinder 15 becomes priming water when the content liquid is poured from the dispensing cylinder 15 and induces dripping of the contents liquid. In this way, each time the opening / closing stopper of the upper lid 2 is repeated, the content liquid scatters and drips, and the outer periphery of the dispensing cylinder 15 of the cap body 1 is soiled by the content liquid.

Japanese Patent Application Laid-Open No. 2005-212836 JP 2001-106251 A JP-A-9-12049

All of the conventional dripping prevention mechanisms relating to the above-described conventional hinge cap are disposed on the inner side of the upper lid in the radial direction of the inner ring.
That is, in the conventional hinge cap, “the content liquid is sucked out from the sealing zone S1 due to the vacuum effect of the sealing zone S2 that occurs when the top cover is opened, and the inner ring 21 located on the extension line is positioned on the outer side in the radial direction. The content liquid that adheres to the inner surface of the plate portion and then adheres to the inner surface of the top plate portion flows downward along the inner wall surface of the skirt portion as the upper lid is opened and closed repeatedly. Each time the liquid enters the part and the upper lid 2 is closed, the liquid content scatters and adheres to the outer peripheral surface of the dispensing tube 15. The adhered liquid content becomes priming water when the liquid content is poured, The dirt mechanism of “inducing dripping” is not considered at all.
Accordingly, any of the above conventional hinge caps has a problem that the outer periphery of the spout of the cap body gets dirty as the opening / closing stopper of the upper lid 2 is repeated.
Therefore, the problem to be solved by the present invention has been made in view of the above-mentioned problems of the prior art, and it is preferable to contaminate the contents of the outer periphery of the spout of the cap body due to repetition of the opening / closing stopper of the upper lid. It is an object of the present invention to provide a hinge cap that can be prevented.

In order to achieve the above object, the hinge cap according to claim 1 includes a cap body and an upper lid that is openably and closably attached to the cap body. The cap body includes a top plate portion and a peripheral portion of the top plate portion. And an opening portion for pouring out the liquid in the container is formed on the top plate portion, and the top surface of the top plate portion is formed outside the opening portion. The part is formed with a dispensing cylinder that serves as a guide for pouring the liquid in the container.
The upper lid includes a top plate portion and a skirt portion extending downward from a peripheral portion of the top plate portion, and the inner surface of the top plate portion of the upper lid has the pouring cylinder when the upper lid is closed. A sealing ring is formed that is in close contact with the inner peripheral surface.
In the hinge cap in which the lower end of the skirt part of the upper lid is connected to the upper part of the circumferential side wall of the cap body via a hinge connecting part,
One or more top plate ribs are formed in an arc shape on the inner surface of the top plate portion on the opposite side of the top plate portion of the upper lid from the seal connecting ring and radially outside the seal ring. And
In the hinge cap, a rib is provided on the inner surface of the top plate portion on the outer side in the radial direction of the inner ring, and the content liquid is held by the top plate rib provided on the inner surface of the top plate portion, so that it is difficult to hang down below the skirt portion.

In the hinge cap according to claim 2, one or a plurality of skirt ribs are formed in an arc shape on the inner wall surface of the skirt portion on the side opposite to the hinge connecting portion of the skirt portion of the upper lid.
In the hinge cap, a rib is provided on the inner wall surface of the skirt portion to prevent the liquid content that could not be held by the top plate rib on the inner surface of the top plate portion from flowing along the inner wall surface of the skirt. The content liquid is prevented from entering the fitting portion with the cap body.

In the hinge cap according to claim 3, the center of the arc forming the top plate rib is located on a plane passing through the center of the hinge connecting portion and the center of the upper lid,
The range of formation of the top plate rib is such that 20 ° <θ ≦ 220 ° with respect to the central angle θ of the arc.
Since the upper lid rotates around the hinge connecting portion, the sealing performance breaks first in the portion of the inner seal portion A opposite to the hinge connecting portion, and the content liquid is sucked out most vigorously in the vicinity of the portion, As a result, the liquid content falls most violently in the vicinity of the inner surface of the top plate located on the extension line.
Therefore, in the hinge cap, the top plate rib is disposed in the above range on the side opposite to the hinge connecting portion so that the content liquid can be held in a wide range including the inner surface of the top plate portion where the content liquid falls most intensely. Become.

In the hinge cap according to claim 4, the center of the arc forming the skirt rib is located on a plane passing through the center of the hinge connecting portion and the center of the upper lid,
The formation range of the skirt rib is 20 ° <θ ≦ 220 ° with respect to the central angle θ of the arc.
In the hinge cap, the skirt rib is disposed at the position and range, so that the liquid content that could not be held by the top plate rib on the inner surface of the top plate portion hardly flows downward along the inner wall surface of the skirt.

In the hinge cap according to claim 5, the outermost rib among the top plate ribs is located inside the opening end of the extraction cylinder with respect to the radial direction of the upper lid.
In the hinge cap, the outermost rib is disposed at the above position so that the liquid dripping from the rib returns to the dispensing cylinder and does not contaminate the outer periphery of the dispensing outlet.

  According to the hinge cap of the present invention, it is possible to suitably prevent contamination by the content liquid around the spout of the cap body with respect to the repeated opening / closing stopper of the upper lid.

It is a section explanatory view showing the hinge cap of the present invention. It is a front view which shows the open state of the hinge cap of this invention. It is AA sectional drawing of FIG. It is principal part sectional drawing of sealing zone S2 of FIG. It is principal part cross-sectional explanatory drawing which shows the conventional hinge cap. It is explanatory drawing which shows the mechanism which concerns on the suction of the content liquid which occurs when opening the upper cover of a hinge cap.

  Hereinafter, the present invention will be described in more detail with reference to embodiments shown in the drawings.

FIG.1 and FIG.2 is explanatory drawing which shows the hinge cap 100 of this invention. 1 is a cross-sectional view showing the closed state of the hinge cap, and FIG. 2 is a front view showing the opened state of the hinge cap.
The hinge cap 100 includes a cap main body 1 attached to the container mouth portion, an upper lid 2 that seals the cap main body 1, and a hinge connecting portion 3 that hinge-couples the cap main body 1 and the upper lid 2. ing.

  As shown in FIG. 1, the cap body 1 includes a top plate portion 4 and a peripheral side wall 18 that descends from the periphery of the top plate portion 4 and engages with the outer peripheral surface of the container mouth portion. The top plate portion 4 is provided with a planned opening portion 11 for pouring out the content liquid and a score 12 serving as a breaking line thereof. On the top surface of the top plate portion 4, a pull ring 13 for pulling with a finger, A column 14 that connects the planned opening portion 11 and the pull ring 13, a pouring cylinder 15 that forms a sealing portion by pressure-engaging with the outer peripheral surface of the sealing ring 21 of the upper lid 2 while serving as a spout for the content liquid, 2 is provided with a circumferential protrusion 16 that fits with the inner peripheral surface of the skirt portion 22 to form a seal portion, and an inner ring 17 that is in close contact with the inner peripheral surface of the container mouth portion is provided on the lower surface of the top plate portion 4. It has been. In addition, the opening plan part 11 said here shall point out the area inside the score 12. FIG.

  The upper lid 2 is fitted to the inner ring 21 that forms a seal portion by pressure-engaging with the inner peripheral surface of the extraction cylinder 15 of the cap body 1 and the circumferential protrusion 16 of the cap body 1 to form a seal portion. It consists of a skirt portion 22 and a top plate portion 23 having a dome structure that allows the content liquid adhering to the inner surface to easily return to the inside of the container when closed. In addition, since the dispensing cylinder 15 forms a step at a portion corresponding to the lower outer peripheral surface of the lip tip, the finger is prevented from directly contacting the sharp lip tip when opening.

Two top plate ribs 24 a and 24 b are provided concentrically on the inner surface of the top plate portion 23 between the inner ring 21 and the skirt portion 22. As shown in FIG. 2, the top plate ribs 24 a and 24 b are arc-shaped ribs concentric with the inner ring 21 or the skirt portion 22. In the present embodiment, the center angle θ of the arc is 180 °.
By disposing the top plate ribs 24a and 24b at the above positions, a small amount of the content liquid sucked out from the sealing zone S1 is extended by the vacuum effect of the sealing zone S2 that occurs when the upper lid 2 is opened. It adheres to and holds the top plate ribs 24a, 24b located on the line. In the embodiment shown in the figure, the formation range of the top plate ribs 24a and 24b is formed over 180 °. Therefore, for example, the content liquid held on the top plate ribs 24a and 24b is not removed even after 100 times of opening. It does not hang down below the skirt. Thus, the content liquid that flows along the inner wall surface of the skirt portion 22 is reduced, and the content liquid that enters the portion that fits the circumferential protrusion 16 of the cap body 1 is almost eliminated.
Although details will be described later with reference to FIG. 3, arc-shaped skirt ribs 25 a and 25 b are provided on the inner wall surface of the skirt portion 22 in parallel to the height direction of the skirt portion 22. Accordingly, in combination with the barrier effect of the skirt ribs 25a and 25b, even when the upper lid 2 is repeatedly opened and closed, the area around the spout (pouring cylinder 15) is hardly contaminated with the content liquid. It is.

FIG. 3 is a cross-sectional view taken along the line AA of FIG. For the convenience of explanation, it is shown reversed (rotated 180 °).
On the inner wall surface of the skirt portion 22, an upper skirt rib 25a and a lower skirt rib 25b are arranged in an arc shape parallel to the height direction.
The skirt ribs 25 a and 25 b serve as a barrier when the content liquid flows downward along the inner wall surface of the skirt portion 22. The content liquid is held by the rib so that the content liquid is in contact with the circumferential protrusion 16 of the upper lid 2. It suitably inhibits entry into the fitting portion.

FIG. 4 is an enlarged view of a main part of the sealing zone S2 of FIG.
Among the top plate ribs, the outer top plate ribs 24b located on the outermost side in the radial direction are arranged so that the radial direction position is inside the opening end of the extraction tube 15. That is, the outer top plate rib 24b is arranged so that the outermost radial direction distance r ₂ of the outer top plate rib 24b is smaller than the outermost radial direction distance R of the opening end of the extraction tube 15. Such an arrangement position is a position where the content liquid sucked out by the vacuum effect when the upper lid 2 is opened and the content liquid adheres, and the sucked content liquid is securely held by the top plate ribs 24a, 24b. It is.

Here, as an example of the dimensions of the inner and outer top plate ribs 24a and 24b, the rib interval L _s1 is, for example, L _s1 = 0.3 to 0.5 [mm], and is set to an interval that can be held by surface tension. It's important to. The rib widths L _d1 and L _{d2 are} 0.3 to 0.5 [mm]. The height of the rib (the amount of protrusion from the inner surface of the top plate portion) is L _h1 , L _h2 = 0.2 to 0.8 [mm], and it is important to secure a space for holding the content liquid. In the present embodiment, the inner top plate rib 24a and the outer top plate rib 24b have the same dimensions, but may be different from each other.

As an example of the dimensions of the upper and lower skirt ribs 25a and 25b, the rib interval L _s2 is, for example, L _s2 = 0.3 to 0.5 [mm], and the rib widths L _d3 and L _d4 = 0. It is 3 to 0.5 [mm]. The height of the rib (the amount of protrusion from the inner wall surface of the skirt portion 22) is L _h3 , L _h4 = 0.2 to 0.8 [mm], and is set in the same manner as the dimensions of the inner and outer top plate ribs 24a and 24b. It's important to. In the present embodiment, the upper skirt rib 25a and the lower skirt rib 25b have the same dimensions, but may be different from each other.

  As described above, the hinge cap 100 of the present invention has the above-described ribs provided on the inner surface of the top plate portion located on the outer side in the radial direction of the inner ring 21 of the upper lid 2 to hold the content liquid adhering to the inner surface of the top plate portion. Is prevented from flowing downward along the inner wall surface of the skirt portion 22. Thereby, even if it is a case where the opening / closing stopper of the upper cover 2 is repeatedly performed, the surroundings of the pouring cylinder 15 (pouring port) of the cap body 1 are not soiled by the content liquid.

By the way, in order to confirm the effect of the present invention, a comparative test in which the hinge cap 100 of the present invention and the conventional hinge cap 500 are respectively attached to the container is repeated 100 times in a cycle of “closing the upper lid → inverting → opening”. Went.
As a result, in the conventional hinge cap 500, contamination by the content liquid was seen on the inner surface of the top plate portion and the inner wall surface of the skirt portion 22 on the radially outer side of the inner ring 21 of the upper lid 2 and on the outer periphery of the dispensing cylinder 15. On the other hand, in the hinge cap 100 of the present invention, the content liquid splashed on the inner surface of the top plate portion of the upper lid 2 is held by the top plate ribs 24a and 24b and the skirt ribs 25a and 25b, so that the inside of the skirt portion 22 of the upper lid 2 is maintained. On the wall surface and the outer periphery of the pouring cylinder 15, almost no dirt due to the content liquid was seen.
Therefore, by providing the top plate ribs 24a and 24b and the skirt ribs 25a and 25b, the inner surface and the skirt portion of the top plate portion on the radially outer side of the inner ring 21 of the top lid 2 and the skirt portion, which are derived from repeated opening and closing plugs of the top lid 2. The contamination by the content liquid on the inner wall surface 22 and the outer periphery of the dispensing cylinder 15 can be prevented.

  Moreover, although the formation range of the top plate ribs 24a and 24b and the skirt ribs 25a and 25b in the above embodiment is formed over 180 °, it is formed over 360 ° in order to increase the content liquid holding amount. You can also. However, in order to prevent contamination by the contents liquid without increasing the amount of resin forming the cap, the top plate rib and the skirt rib are formed in such a range that the center angle θ of each arc is 20 ° <θ ≦. It is preferable to select appropriately within the range of 220 °, particularly 100 ° <θ ≦ 200 °.

  Further, the cross-sectional shapes of the top plate ribs 24a, 24b and the skirt ribs 25a, 25b in the above embodiment are elliptical, but the shape is not limited to this shape, and the inner surface of the top plate portion to be arranged And the viscosity of the content liquid. However, the rib has a convex shape (a shape whose width becomes narrower as the distance from the lower surface increases).

  The number of the top plate ribs 24a, 24b and the skirt ribs 25a, 25b in the above embodiment is two, but the number is not limited to this number, and the width of the inner surface of the top plate portion to be arranged It is determined according to the viscosity of the liquid content.

  The hinge cap of the present invention can be suitably applied to the hinge cap of storage containers for seasonings and beverages.

DESCRIPTION OF SYMBOLS 1 Cap main body 11 Planned opening part 12 Score 13 Pull ring 14 Support | pillar 15 Outflow pipe | tube 16 Circumferential protrusion 17 Inner ring 18 Circumferential side wall 2 Upper lid 21 Sealing ring 22 Skirt part 23 Top plate part 24a, 24b Inner / outer top plate rib 25a, 25b Upper and lower skirt ribs 3 Hinge connecting part 4 Top plate part 100 Hinge cap 500 Conventional hinge cap

Claims (5)

The cap body includes an upper lid that can be opened and closed to the cap body. The cap body includes a top plate portion and a circumferential side wall that descends from a peripheral portion of the top plate portion. Is formed with a planned opening for pouring out the liquid in the container, and on the top surface of the top plate portion, a pouring tube serving as a guide for pouring out the liquid in the container is provided on the outer portion of the planned opening. Formed,
The upper lid includes a top plate portion and a skirt portion extending downward from a peripheral portion of the top plate portion, and the inner surface of the top plate portion of the upper lid has the pouring cylinder when the upper lid is closed. A sealing ring that is in close contact with the inner peripheral surface is formed,
In the hinge cap in which the lower end of the skirt part of the upper lid is connected to the upper part of the circumferential side wall of the cap body via a hinge connecting part.
One or more top plate ribs are formed in an arc shape on the inner surface of the top plate portion on the opposite side of the top plate portion of the upper lid from the seal connecting ring and radially outside the seal ring. And hinge cap.   2. The hinge cap according to claim 1, wherein one or a plurality of skirt ribs are formed in an arc shape on an inner wall surface of the skirt portion on a side opposite to the hinge connection portion of the skirt portion of the upper lid. The center of the arc forming the top plate rib is located on a plane passing through the center of the hinge connecting portion and the center of the upper lid,
2. The hinge cap according to claim 1, wherein a formation range of the top plate rib is 20 ° <θ ≦ 220 ° with respect to a central angle θ of the arc. The center of the arc forming the skirt rib is located on a plane passing through the center of the hinge connecting portion and the center of the upper lid;
3. The hinge cap according to claim 2, wherein the formation range of the skirt rib is 20 ° <θ ≦ 220 ° with respect to a central angle θ of the arc.   5. The hinge cap according to claim 1, wherein an outermost rib among the top plate ribs is located on an inner side than an opening end of the extraction cylinder with respect to a radial direction of the upper lid.

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