JP4519250B2 - Hinged cap - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cap that can be suitably used for contents that require hot filling and retort sterilization, and more specifically, in the step of injecting cooling water into the cap for cooling after hot filling or the like. It is related with the cap by which the cooling water which penetrate | invaded into this was discharged | emitted or lose | disappeared rapidly, and water was prevented from staying in a cap.
[0002]
[Prior art]
Cap with a cap body having a dispensing opening fitted to the container mouth and an upper lid fitted to the cap body so as to cover the dispensing opening of the cap body can be easily opened and sealed. Since it is excellent, it is widely used in the field of food and the like.
[0003]
When the content is natural fruit juice or seasoning, it is subjected to hot filling and retort sterilization after filling and sealing to ensure the preservation of the contents. In this case, hot filling and sealing Since the sealed container is finally cooled by applying cooling water, the sealed container is in a reduced pressure state due to a temperature change from high temperature to low temperature. Along with the reduced pressure state, the cap inner space is also in a reduced pressure state, and thus the cooling water tends to be sucked. The water sucked into the cap causes mold and is not preferable from a hygienic point of view, but also has a problem of giving the consumer unpleasant feeling.
[0004]
In order to solve such a problem, various caps have been proposed conventionally.
For example, in Utility Model Registration No. 2555362, a notch is provided in the outer peripheral portion of the outer surface of the cap top plate portion, and when the upper lid is fitted to the cap body, the outer side portion of the circumferential side wall portion surrounding the planned opening portion for extraction In addition, a cap has been proposed in which a space formed by the inner surface of the upper lid and the peripheral edge portion of the outer surface of the top body of the cap body communicates with the outside air through the notches.
[0005]
The cap prevents cooling water from entering the dispensing opening by engaging the upper end of the circumferential side wall and the inner ring of the upper lid. However, when the inside of the container is depressurized, the cap body is sucked toward the container side. For this reason, there is a possibility that the circumferential side wall slightly moves to the container side and the engagement becomes insufficient, and a stronger and more reliable engagement is desired so that the cooling water does not enter the dispensing opening side.
In addition, as a cap provided with a notch (gap) between the upper lid and the cap body, a cap having a protrusion formed on at least one of the lower end of the upper lid or the upper surface of the cap body is known (utility model registration). No. 2534269). This cap is originally formed with a protrusion in order to prevent splashing when the upper lid is engaged with the cap body, but a gap is formed between the upper lid and the cap body due to the formation of the protrusion, It has the same effect as the cap.
[0006]
[Problems to be solved by the invention]
In the latter cap, in addition to the upper end of the circumferential side wall that surrounds the dispensing opening and the inner ring of the upper lid, by engagement of the engaging ridges provided on the inner side of the lower end of the upper lid and the engaging cylindrical portion of the cap body, Engagement is strengthened.
However, even in this case, since the protrusions only engage in the vertical direction, when the inside of the container is in a decompressed state, the cap body is pulled toward the container side and the engagement becomes insufficient, and the cooling water is It will enter inside from the engaging part. Thus, it is difficult for the cooling water that has entered the inside of the cap engagement portion to be easily discharged or lost, resulting in a problem that the cooling water remains inside the cap.
[0007]
Further, in the cap in which the skirt portion of the cap body is formed from the double side wall, when the protrusion is formed on the contact surface in this way, there is a problem that the outer side wall of the cap body is distorted in the closed state. .
Accordingly, an object of the present invention is to provide a cap in which the cooling water does not penetrate to the vicinity of the cap barrel and the cooling water sucked into the cap can be quickly discharged or lost.
Another object of the present invention is to provide a cap capable of effectively removing cooling water without causing distortion of the cap even when the cap body has a double side wall.
[0008]
[Means for Solving the Problems]
According to the present invention, a cap main body having a top plate portion and a cylindrical side wall depending from the periphery of the top plate portion, and the cylindrical side wall is fitted and fixed to the container mouth portion, and the upper end of the cylindrical side wall of the cap main body A hinged cap formed with a top lid portion hinged to a portion, and the top plate portion is formed with a pouring tube and a planned opening section partitioned by a score inside the pouring tube,
An upward-facing annular protrusion is formed between the dispensing cylinder of the cap body and the periphery of the top plate portion, and a circumferential recess is formed on the lower inner surface of the skirt portion of the upper lid, and the inner surface side of the circumferential recess is A radially inward locking portion that can be locked in a liquid-tight state is formed between the annular protrusion and an annular contactable upper end of the annular protrusion and an upper portion of the circumferential recess of the upper lid. A horizontal plane is formed, and a contact surface and a water discharge mechanism provided between the contact surfaces are formed between the periphery of the top plate portion of the cap body and the lower end of the skirt portion of the upper lid. A hinged cap is provided.
[0009]
In the hinged cap of the present invention,
1. 1. The water discharge mechanism is made up of notches provided in the circumferential direction at the periphery of the top plate portion. 2. The water discharge mechanism is formed by small protrusions provided at intervals in the circumferential direction on the lower end of the skirt portion of the upper lid or on the periphery of the top plate portion of the cap body. When the small protrusion is provided at the lower end of the upper lid skirt part, the small protrusion adjacent to the hinge at the top plate part of the cap body, and when the small protrusion is provided at the peripheral edge of the top body of the cap body, the small protrusion adjacent to the hinge. It is particularly preferable that a step forming portion having the same height as is provided.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, the radially protruding annular protrusion formed between the pour tube of the cap body and the periphery of the top plate portion, and the radially inward locking portion formed on the inner surface side of the skirt portion of the upper lid However, it is an important feature that it can be locked in a liquid-tight state. That is, the sealed container subjected to hot filling or the like is cooled by applying cooling water, and the sealed container is decompressed by a temperature change from high temperature to low temperature. For this reason, the cap body attached to the container mouth is pulled toward the container, but in the present invention, the engagement between the annular protrusion and the locking part maintains a liquid-tight state even in such a reduced pressure state. Therefore, it is possible to effectively prevent the cooling water from entering the space in the cap inside the periphery of the top plate portion of the cap body.
[0011]
An annular projecting portion formed on the inner side of the skirt portion of the upper lid and an annular projecting portion formed on the inner surface side of the skirt portion are formed in such a manner. In order to ensure a strong liquid-tight state even in a reduced pressure state, not only the vertical engagement, but also an annular horizontal surface that can contact each other above the upper part of the annular projection and the upper lid locking part is formed. It is preferable. That is, it is assumed that the top surface of the upper lid is sucked downward (container side) in the reduced pressure state by forming an annular horizontal surface that can be brought into contact with each other above the upper portion of the annular protrusion and the locking portion of the upper lid. However, the skirt portion of the upper lid does not shift downward, and no deviation occurs between the annular protrusion and the locking portion, so that a strong liquid-tight state can be secured.
[0012]
In the hinged cap of the present invention, it is also an important feature that a water discharge mechanism is formed on the contact surface between the top plate periphery of the cap body and the lower end of the skirt portion of the upper lid. That is, as described above, in the hinged cap of the present invention, water such as cooling water does not enter the inner space of the cap inside the top plate periphery of the cap body, and the top plate periphery of the cap body and the lower end of the skirt portion of the top lid Water is accumulated only on the contact surface formed by For this reason, in this invention, it becomes possible to form the water discharge mechanism in a contact surface, and to discharge | emit or lose | disappear the water collected on the contact surface quickly.
[0013]
In the present invention, a notch is formed in the peripheral edge of the cap body top plate part at a circumferential interval, or a small protrusion is provided in the circumferential direction at either the lower end of the top cover skirt part or the peripheral edge of the cap body top plate part. By providing, it is desirable to form a discharge mechanism on the contact surface. That is, by providing a notch or a small protrusion, a gap is formed on the contact surface, water is discharged, outside air can be taken into the contact surface, and loss due to evaporation of moisture can be promoted. It becomes.
[0014]
When a small protrusion is provided as a discharge mechanism, the small protrusion is not provided on the peripheral edge of the top plate portion of the opposing cap body or the upper lid skirt part without the small protrusion so that the lower end of the small protrusion forms a contact surface. It is desirable to provide a step according to the height. That is, a groove corresponding to the height of the small protrusion is formed in the entire portion in contact with the small protrusion. Thereby, the contact surface becomes a flat surface, and the cap is prevented from being distorted in the closed state. In particular, in a cap having a cap body skirt portion having a double side wall, the thickness of the side wall is thin and easily distorted, so it is preferable to provide a step.
[0015]
【Example】
Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is an example in which a notched portion is provided on the periphery of a cap body top plate portion as a discharge mechanism in a hinged cap of the present invention, (A) is a side view in a closed state, and (B) is an upper surface in an opened state. FIG. 3C is a side sectional view in the opened state.
FIG. 2 shows an example of a cap with hinge according to the present invention, in which the cap body skirt portion has a double side wall, and a notch portion is provided on the periphery of the top plate portion of the cap body as a discharge mechanism. (B) is a top view in the opened state, (C) is a side sectional view in the opened state.
FIG. 3 shows a cap with a hinge according to the present invention, in which the cap main body skirt portion has a double side wall, and is an example in which a small protrusion is provided on the upper lid as a discharge mechanism, (A) is a side view in a closed state, (B) is a top view in the opened state, (C) is a side sectional view in the opened state.
[0016]
The hinged cap 1 shown in FIGS. 1 to 3 generally includes a cap body 2 fixed to a container mouth (not shown) and an upper lid 4 integrally connected to the cap body 2 by a hinge 3. ing.
In FIG. 1, the cap body 2 includes a top plate portion 5 and a cylindrical side wall 6 that hangs down from an end portion of the top plate portion. Formed on the inner surface of the top plate portion 5 is a cylindrical projection 7 extending downward with a space from the cylindrical side wall 6. That is, the container mouth portion is inserted between the cylindrical side wall 6 and the cylindrical protrusion 7, and the cap body 2 is fixed to the container mouth portion by the convex portion 8 formed on the inner surface of the cylindrical side wall 6. Of course, it is also possible to fix the cap body 1 to the container mouth part by providing a screw-like projection on the inner surface of the cylindrical side wall 6 instead of the convex part 8 and screwing it onto the outer surface of the container mouth part. .
[0017]
Also, a pour tube 9 is formed on the top surface of the top plate portion 5, and a planned opening portion 12 that is partitioned by a score 10 and provided with a score tearing tab 11 is formed inside the pour tube 9. Has been.
An upward annular protrusion 14 is formed between the extraction tube 9 and the top plate peripheral edge 13. The annular protrusion 14 has a flat upper end 14a, and a protruding portion 14b formed on the upper outer surface. The protruding portion 14b is firmly engaged with a locking portion of an upper lid described later in the closed state.
The top plate periphery 13 is provided with a plurality of notches 15, 15 at intervals in the circumferential direction, and a gap is formed in the contact surface formed at the top plate periphery and the top lid skirt end in the closed state. Forming a water discharge mechanism such as cooling water.
[0018]
The upper lid 4 includes a top surface 20 and a skirt portion 21 that hangs down from the periphery of the top surface 20. The skirt portion 21 is connected to the top plate peripheral edge 13 of the cap body 1 and the hinge 3 at the lower end portion thereof, and is held so as to be able to turn. A knob 22 is provided on the side opposite to the connecting portion by the hinge 3 so that the closed upper lid 4 can be easily opened by hand.
An inner ring 23 is provided on the inner surface of the top surface 20. The inner ring 23 is inserted into the pouring tube 9 of the cap body when the upper lid 4 is closed, and is in close contact with the inner surface of the pouring tube 9 to form a hermetic seal.
[0019]
In the present invention, a circumferential concave portion 24 is provided on the lower inner surface of the skirt portion 21 of the upper lid 4 to form a locking portion that engages with the annular protrusion 14 of the cap body. In addition, an annular horizontal surface 25 is formed above the circumferential recess 24 (on the top surface side), and is configured to be in close contact with the upper end 14a of the annular protrusion 14 described above.
Accordingly, in the closed state, the protrusion 14 b of the annular protrusion 14 of the cap body 2 engages with the circumferential recess 24 of the upper lid 4, and the annular horizontal surface 25 formed above the circumferential recess 24 is the annular protrusion 14. Since the upper lid 14a is in close contact with the upper end 14a (see FIG. 2A), the upper lid skirt portion is shifted downward even when the pressure is reduced and the upper lid top surface is sucked toward the container or when force is applied to the upper lid from above. Since this is effectively prevented, there is no deviation between the annular projection and the locking portion, and a reliable sealed state can be maintained.
[0020]
The cap shown in FIG. 2 is a hinged cap provided with a notch as a discharge mechanism, similar to the cap shown in FIG. 1, but is a type of cap in which the cylindrical side wall of the cap body is a double side wall. That is, in the cap body 2 of the cap shown in FIG. 2, the cylindrical side wall 6 is composed of the inner wall 6a and the outer wall 6b, and the inner wall 6a and the outer wall 6b are integrally connected at the lower end.
In this double side wall type cap, a score (not shown) is formed on the outer wall 6b from both ends of the hinge portion, and the lower end of the inner wall 6a is located at a position corresponding to the score of the outer wall 6b. A score (not shown) is formed from at least to the upper end of the convex portion 8, by pulling the upper lid downward (container side), breaking the score of the outer wall 6 b to the lower end, and then pulling the upper lid upward The score of the inner wall 6a is broken, and the cap can be easily removed from the container.
[0021]
2 except that the cylindrical side wall 6 of the cap body is a double side wall (inner side wall 6a, outer side wall 6b), and the top plate peripheral edge 13 in FIG. 1 is the upper end 16 of the outer side wall 6b. The configuration of the cap in FIG. 1 is the same.
Also in the case of a double side wall type cap, the cutout portion 15 can be provided at the lower end of the upper lid skirt portion 21 instead of being provided at the upper end of the outer wall 6b.
[0022]
The cap shown in FIG. 3 is a hinged cap in which the cylindrical side wall of the cap body forms a double side wall in the same manner as the cap shown in FIG. 2, but a small protrusion is provided at the lower end of the skirt portion of the upper lid as a discharge mechanism. It is different in that it is provided. That is, a plurality of small protrusions 27 and 27 are circumferentially spaced at the lower end 26 of the skirt portion 21 of the upper lid 4 shown in FIG. Due to the presence of the small protrusions 27, a gap is formed between the lower end 26 of the skirt portion 21 and the upper end portion 16 of the outer wall 6b of the cap body 2 in the closed state, thereby constituting a cooling water discharge mechanism.
[0023]
On the other hand, the small projection contacts the upper end portion 16 of the outer wall 6b of the cap body 2. In the cap shown in FIG. 3, a step 28 is provided on the upper end portion 16 by the height of the small projection 27. ing. That is, the height of the upper end 16a of the outer wall 6b adjacent to the hinge 3 remains the same, and the upper end of the upper end 16b in the range of the arrow XX in FIG. A step is provided so as to be lower than the portion 16a. Thereby, in the closed state, the tip of the small protrusion constitutes a contact surface, and the cap can be effectively prevented from being distorted in the closed state. In particular, in the double side wall type cap as shown in FIG. 3, the outer wall 6b with which the small protrusions abut is thinner than the cylindrical side wall of the normal cap as shown in FIG. Although there is a possibility that the occurrence becomes remarkable, as shown in FIG. 3, the occurrence of such a distortion can be effectively prevented by providing a step and keeping the contact surface constant.
[0024]
In the present invention, when a small protrusion is provided as a discharge mechanism, instead of providing a small protrusion at the lower end of the skirt portion of the upper lid described above, the top plate edge of the cap body or a double side wall type cap is similar to the upper end of the outer wall. May be provided. In this case, it is desirable to provide a step corresponding to the height of the small protrusion at the lower end of the skirt portion of the upper lid.
[0025]
A plurality of notches and small protrusions that form the discharge mechanism are provided on the cap top plate part or the upper lid skirt part at intervals in the circumferential direction, the number of which can be appropriately determined depending on the size of the cap and the like. It is preferable that the number is about 4 to 15.
Of course, the size of the notch and the small protrusion is not limited to this, but the size of the notch is preferably about 1 to 5 mm in width and about 0.2 to 2.0 mm in height. The size of the small protrusion is preferably about 1 to 5 mm in width and about 0.2 to 1.0 mm in height.
[0026]
【The invention's effect】
According to the hinged cap of the present invention, the upward annular projection is formed between the extraction cylinder of the cap body and the periphery of the top plate portion, and between the annular projection on the inner surface side of the skirt portion of the upper lid. A locking portion in the radially inward direction that can be locked in a liquid-tight state is formed, and a water discharge mechanism is formed on the contact surface between the periphery of the top plate portion of the cap body and the lower end of the skirt portion of the upper lid. As a result, it was possible to provide a cap in which the cooling water did not penetrate to the vicinity of the cap barrel and the cooling water sucked into the cap could be quickly discharged or lost. In addition, even when the cap body has a double side wall, the cap can be effectively removed without causing distortion of the cap.
[Brief description of the drawings]
FIG. 1 is a view showing an example of a hinged cap provided with a notch on the periphery of a cap body top plate as a discharge mechanism.
FIG. 2 is a view showing another example of a hinged cap provided with a notch at the periphery of the top plate portion of the cap body as a discharge mechanism.
FIG. 3 is a view showing an example of a hinged cap provided with a small protrusion on an upper lid as a discharge mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cap with hinge 2 Cap main body 3 Hinge 4 Top cover 5 Cap main body top plate part 6 Cylindrical side wall 9 Outlet cylinder 13 Top plate peripheral part 14 Annular projection 15 Notch part 20 Top surface 21 Skirt part 23 Inner ring 24 Circumferential recessed part 25 Annular Level 28 level difference

Claims (4)

A cap body having a top plate portion and a cylindrical side wall depending from the periphery of the top plate portion, and the cylindrical side wall is fitted and fixed to the container mouth portion, and is hinged to the upper end portion of the cylindrical side wall of the cap body In the hinged cap, which is composed of an upper lid, and the top plate portion is formed with a pouring tube and a planned opening portion partitioned by a score inside the pouring tube,
An upward-facing annular protrusion is formed between the dispensing cylinder of the cap body and the periphery of the top plate portion, and a circumferential recess is formed on the lower inner surface of the skirt portion of the upper lid, and the inner surface side of the circumferential recess is A radially inward locking portion that can be locked in a liquid-tight state is formed between the annular protrusion and an annular contactable upper end of the annular protrusion and an upper portion of the circumferential recess of the upper lid. A horizontal plane is formed, and a contact surface and a water discharge mechanism provided between the contact surfaces are formed between the periphery of the top plate portion of the cap body and the lower end of the skirt portion of the upper lid. Hinged cap.   The hinged cap according to claim 1, wherein the water discharge mechanism is formed by a notch portion provided at a peripheral edge in the circumferential direction on the periphery of the top plate portion. 2. The hinged cap according to claim 1, wherein the water discharge mechanism is formed by small protrusions provided at intervals in the circumferential direction on the lower end of the skirt portion of the upper lid or on the periphery of the top plate portion of the cap body.   4. A step forming portion having the same height as the small protrusion is provided adjacent to the hinge on the top plate peripheral edge or upper lid skirt lower end of the cap body with which the tip of the small protrusion abuts. Hinged cap as described.

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