JP2023163397A - measuring cap - Google Patents

Abstract

To create a measuring cap with which filled liquid quantity can be easily visually confirmed from outside and content liquid deterioration can be suppressed.SOLUTION: A measuring cap, which is in the shape of a capped cylinder, has a top wall 2 and a cylindrical side wall 3 hanging from the outer edge of the top wall 2, and is formed with opaque colored resin Ra, is structured as such that the side wall 3 is provided with a window portion 8 made of transparent resin Rb.SELECTED DRAWING: Figure 2

Description

The present invention relates to a metering cap with a window.

As a measuring cap that can be removably attached to the spout or neck of a container filled with liquid, it is made of transparent resin and formed into a cylinder with a bottom.Dose lines (scale lines) are provided on the inner wall surface of the measuring cap, and it is possible to measure from the container. A prior art technique is known in which the level of the liquid content poured into the cap can be visually checked (for example, Patent Document 1).

Utility Model Publication No. 2-8745

However, if the entire measuring cap is made of transparent resin, on the one hand, the amount of liquid poured can be easily seen from the outside, but on the other hand, sunlight can directly illuminate the liquid, so for example, In the case of a chemical solution made of agricultural chemicals, etc., there is a risk that the content liquid may be deteriorated by the influence of ultraviolet rays or the like.

Another method is to provide scale lines using annular ribs or printed scale lines on the inner wall surface of a colored, opaque measuring cap to suppress deterioration of the content due to ultraviolet rays, etc.; however, in the case of annular ribs, the inner wall surface There is a risk that the lines will blend together and become difficult to visually recognize, and in the case of printed lines, there is also the problem that a separate printing process is required.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems in the prior art, it is an object of the present invention to create a measuring cap that can suppress the deterioration of the liquid content and also allows the amount of the liquid content to be easily seen from the outside.

Among the means for solving the above problems, the main means of the present invention are:
A capped cylindrical measuring cap formed of an opaque colored resin and having a top wall and a cylindrical side wall hanging from the outer edge of the top wall,
The device is characterized in that the side wall is provided with a window made of transparent resin.
In the main means of the present invention, since a window made of transparent resin is provided on the side surface of the measuring cap, the amount of the liquid content poured into the measuring cap can be easily seen through the window. .

Further, another means of the present invention is the above-mentioned main means of the present invention in which the window portion is formed in a vertical strip shape on the side wall, or over half or the entire circumference. be.
With the above means, the aspect of the window can be matched to the design of the metering cap.

Further, another means of the present invention is one in which a scale line is provided on one or both of the side wall and the window section in addition to any of the above means.
With the above means, it is possible to improve the visibility of the scale lines.

Further, another means of the present invention is one in which the scale line is formed of a whitening line utilizing a whitening phenomenon.
With the above means, the scale lines can be formed at the same time as the measuring cap is formed.

Further, another means of the present invention is to add to any of the above means a tamper-evident ring 4 which is connected to the lower end of the side wall via a plurality of breakable connecting pieces. It is something that
With the above means, unauthorized release of the metering cap can be suppressed.

In the present invention, when the measuring cap is attached to the mouth tube of the container body in an unopened state, deterioration of the content liquid can be suppressed, and when the content liquid is poured into the measuring cap after opening, the amount of the content liquid can be easily determined from the outside. can be visually recognized.

FIG. 2 is a half-sectional view showing the metering cap of the present invention. FIG. 3 is a front view showing a state in which a measuring cap is attached to the mouth of the container. It is an explanatory view showing an example of the usage state of the installation cap. It is a diagram. FIG. 2 is a cross-sectional view schematically showing a nozzle part and a mold as main parts of a manufacturing apparatus for injection molding a metering cap. It is an explanatory view showing an injection pattern of molten resin. The state of the injected molten resin is shown, (a) is a plan sectional view in section a and section c in FIG. 5, and (b) is a plan sectional view in section b in FIG. 5. (a) is a plan cross-sectional view of the measuring cap at VIIa-VIIa in FIG. 1, (b) is a plan cross-sectional view of the measuring cap at VIIb-VIIb in FIG. 1, and (c) is a top view of the measuring cap. . FIG. 7 is a plan sectional view showing another embodiment of the measuring cap, in which (a) shows a case in which half the circumference is formed by a window portion, and (b) shows a case in which the entire circumference is formed by a window portion. FIG. 3 is a half-sectional view of the measuring cap showing a method of forming scale lines.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a half-sectional view showing a measuring cap of the present invention, FIG. 2 is a front view showing a state in which the measuring cap is attached to the mouth of a container, and FIG. 3 is an explanatory diagram showing an example of the usage state of the attached cap.

As shown in FIG. 1, the measuring cap 1 of the present invention includes a cap body 1A having a capped cylindrical shape and having a cylindrical side wall 3 hanging from the outer edge of a disc-shaped top wall 2. Ru.
The top wall 2 and side wall 3 that constitute the cap body 1A are formed using an opaque colored resin Ra, which is a mixture of a synthetic resin material such as PP, PE, or PET, and a coloring agent such as white.

On the inner surface of the top wall 2, a short cylindrical inner cylinder portion 6 that tightly fits into the inner surface of the open end of the mouth tube portion 11 on the side of the container body 10 is provided hanging down, and on the inner peripheral surface of the side wall 3, the inner cylinder portion 6 is suspended. A female thread 7 is formed to be screwed into a male thread 12 formed on the outer peripheral surface of the mouth tube portion 11.
Further, a vertical strip-shaped window portion 8 made of a translucent or transparent resin such as PP, PE or PET is integrally formed in a part of the side wall 3 constituting the cap body 1A. The inside of the metering cap 1 can be visually recognized through this semi-transparent or transparent window section 8.

Furthermore, in this embodiment, a tamper-evident ring 4 connected via a plurality of connecting pieces 5 is integrally formed at the lower end of the side wall 3 constituting the cap body 1A. An undercut-shaped locking protrusion 9 is provided on the inner surface of the tamper-evident ring 4 .
Further, on one or both of the side wall 3 and the window portion 8, a scale line M is formed by a whitening line utilizing a whitening phenomenon.

As shown in FIG. 2, the measuring cap 1 is screwed onto the mouth tube portion 11 of the container body 10 filled with the liquid. At this time, the undercut-shaped locking protrusion 9 formed on the tamper-evident ring 4 moves downwardly over the locked portion (not shown) formed on the outer peripheral surface of the mouth tube portion 11 and engages. In order to prevent this, the metering cap 1 is configured so that it cannot be removed from the mouth tube portion 11 after being attached.

In an unopened state where the measuring cap 1 is attached to the mouth part 11 of the container body 10, the open end of the mouth part 11 is covered by the top wall 2 made of colored resin, and ultraviolet rays etc. are absorbed by the liquid inside the container. Since the inner tube part 6 fits and seals the inner surface of the opening end of the mouth tube part 11, it is possible to suppress the deterioration of the contents. ing.

To open the cap from an unopened state, the cap body 1A is strongly rotated in the unsealing direction while gripping the side wall 3. Then, the cap body 1A is screwed up and raised, but the tamper-evident ring 4 remains in place as the locking protrusion 9 engages with the locked portion formed on the outer circumferential surface of the mouth tube portion 11. Since they try to fit together, the plurality of connecting pieces 5 can be broken. Therefore, by unscrewing and removing only the cap body 1A, the spout portion 11 can be brought into an unsealed state.

As shown in FIG. 3, after opening, the cap body 1A is placed on a table or the like with the top wall 2 facing downward, and the liquid content is poured into the cap body 1A while tilting the container body 10. At this time, since the window 8 is formed in the cap body 1A, the amount of the liquid content poured into the cap body 1A can be easily checked from above the cap body 1A and through the window 8. can.

Next, a method for manufacturing the measuring cap having the above structure will be explained.
FIG. 4 is a sectional view schematically showing a nozzle part and a mold as the main parts of a manufacturing apparatus for injection molding a metering cap.
The measuring cap manufacturing apparatus shown in FIG. 4 is basically the same as the apparatus described in the specification and drawings attached to Japanese Patent Application No. 2012-263132 previously filed by the present applicant. It is provided with a nozzle part 20 for injecting two types of molten resin made of resin Rb, and a mold 40 having a cavity 42 for molding the molten resin injected from the nozzle part 20 into the measuring cap 1.

As shown in FIG. 4, the nozzle section 20 basically has a cylindrical inner mandrel 21 and an outer mandrel 22 disposed coaxially, and the tip of the nozzle section 20 is disposed inside the inner mandrel 21. A cylindrical shut-off pin 30, which functions to open and shut off the flow of molten resin, is inserted and arranged so as to be slidable forward and backward. The tip of the shutoff pin 30 is formed into a conical shape, and this conical tip 30t protrudes from the tip of the inner mandrel 21 when the shutoff pin 30 is in the open position. Further, in this embodiment, the conical tip portion 30t is configured to be eccentric to the left side in the drawing with respect to the central axis Ax.

Between the inner mandrel 21 and the outer mandrel 22, there are provided a cylindrical flow path 25 through which colored resin Ra flows and a narrow groove-shaped vertical flow path 27 through which transparent resin Rb flows. A diameter-reducing flow path 26 is formed at the lower end of the tube. Further, on the downstream side of the tip of the diameter-reduced flow path 26, a cylindrical merging path 29 is provided where the molten colored resin Ra and the transparent resin Rb merge. The colored resin Ra and the transparent resin Rb merge in the confluence channel 29 to form a cylindrical molten resin, which is further injected and filled into the cavity 42 through the pin gate 41 in the mold 40 .

FIG. 5 is an explanatory diagram showing the injection pattern of the molten resin injected into the cavity, FIG. 6 shows the state of the molten resin to be injected, and (a) is a plan cross-sectional view in section a and section c in FIG. (b) is a plan cross-sectional view in section b in FIG. 5. 7(a) is a plan sectional view of the measuring cap at VIIa-VIIa in FIG. 1, FIG. 7(b) is a plan sectional view of the measuring cap at VIIb-VIIb in FIG. It is a top view of a cap.

The molten colored resin Ra and transparent resin Rb are injected from the nozzle section 20 according to the injection pattern shown in FIG. That is, in the interval a from time t1 to time t2 after the start of injection, only the colored resin Ra is injected, and in the interval b from time t2 to time t3, the colored resin Ra and transparent resin Rb are injected together, and then the colored resin Ra and the transparent resin Rb are injected together. In the interval c from t3 to time t5, only the colored resin Ra is injected.

More specifically, as shown in FIG. 6(a), the planar cross section of the cylindrical molten resin is entirely composed of colored resin Ra only in sections a and c, but as shown in FIG. 6(b). As shown, in the section b, the transparent resin Rb is laminated in a radial direction in the form of a slit in the circular colored resin Ra by the eccentric conical tip 30t of the shutoff pin 30. Molten resin having such a flat cross section can be obtained by advancing and retracting the shutoff pin 30 at appropriate timing and controlling opening and blocking of the flow of the molten resin at the tip of the nozzle section 20. It becomes.

When the cylindrical molten resin configured as described above is injected and filled into the cavity 42 in the mold 40, the colored resin Ra injected in the first section a spreads over the top wall forming part 42c of the cavity 42. and the intermediate wall part 42b, and is further filled into the ring forming part 42a from the connecting piece forming part 42d to form the tamper-evident ring 4 and the connecting piece 5 (see FIG. 7(a)), and then injected in the following section b. The molten resin (resin in which a slit-shaped transparent resin Rb is laminated in a circular colored resin Ra) passes through the top wall forming part 42c of the cavity 42 and fills the intermediate wall part 42b, thereby forming the side wall 3 and the window part 8. The colored resin Ra injected in the last section c is filled into the top wall forming part 42c on the pin gate 41 side of the cavity 42 to form the top wall 2 (see FIG. 7(b)). c). In the intermediate wall portion 42b, as shown in FIG. 7(b), the transparent resin Rb is laminated in a longitudinal band shape, penetrating in the radial direction a part of the colored resin Ra that forms the side wall 3 in a cylindrical shape. Thereby, it is possible to integrally mold the measuring cap 1 having the transparent window portion 8 on a part of the side wall 3 in a high-quality state.

The circumferential range that the window 8 occupies within the side wall 3 is arbitrary; it may be formed in a vertical strip shape in a part of the side wall 3 as described above, or in other cases, for example, half the circumference of the side wall 3 may be formed as a window. 8 (see FIG. 8(a)). Alternatively, a configuration may be adopted in which the entire circumference of the side wall 3 is used as the window portion 8 (see FIG. 8(b)). Such a configuration adjusts the timing at which the shutoff pin 30 opens and blocks the flow of the molten resin at the tip of the nozzle section 20, and the colored resin forming the cylindrical molten resin generated in the confluence channel 29 is adjusted. It can be easily set by changing the ratio of Ra and transparent resin Rb.

Next, a method for forming the scale lines M will be explained.
FIG. 9 is a half-sectional view of a measuring cap showing a method of forming scale lines.
FIG. 8 is a plan sectional view showing another embodiment of the measuring cap, in which (a) shows a case in which half the circumference is formed by a window, and (b) shows a case in which the entire circumference is formed by a window.

The formation of the scale line M in the present invention is effective when the measuring cap 1 is injection molded using a crystalline resin such as PP, PE or PET. In the measuring cap 1 formed using crystalline resin, when a large stress due to partial external pressure is applied to a predetermined height position, the resin corresponding to the stressed part due to the whitening phenomenon is reduced by the thickness of the part. Can be whitened radially. Therefore, as shown in FIG. 9, in the present invention, by applying stress in an annular manner to the side wall 3 and the window 8 of the measuring cap 1, the scale line M consisting of a whitening line is applied to the side wall 3 and the window 8. It is formed in an annular shape in the circumferential direction on both sides. As a means for applying stress, for example, the measuring cap 1 in the mold 40 after injection molding may be poked with an air cylinder, or the measuring cap 1 may be forcefully removed when the measuring cap 1 is released from the mold 40. A method of applying stress to the material, or a method of causing whitening by applying pressure during injection can be adopted.

In the above method, the scale line M can be formed not only on the colored side wall 3 but also on the transparent window part 8, and can be formed in the radial direction between the inner and outer surfaces thereof. , the visibility of the scale lines M can be improved.
Furthermore, since the scale lines M can be formed at the same time as the injection molding of the measuring cap 1, the conventional process for forming the scale lines M (such as a printing process) can be made unnecessary.
In addition, in the structure in which the entire circumference of the side wall 3 is made into the window part 8, the scale line M is formed only in the window part 8.

Although the structure of the present invention and its effects have been described above with reference to Examples, the embodiments of the present invention are not limited to the above-mentioned Examples.
For example, in the above embodiment, the case where the side wall 3 is cylindrical is shown and explained, but it may be polygonal.

Furthermore, in the above embodiment, a case was explained in which the measuring cap was formed using crystalline synthetic resin in order to form the scale line M by utilizing the whitening phenomenon. When forming the scale lines using the method described above, the measuring cap may be formed using an amorphous synthetic resin.

Further, in the above embodiment, a case was described in which a white color in which the color is less noticeable was used as the colorant in order to utilize the whitening phenomenon, but colorants of other colors may also be used.

The present invention can be applied to a wider range of applications in the field of measuring caps.

1: Measuring cap 1A: Cap body 2: Top wall 3: Side wall 4: Tamper-evident ring 5: Connecting piece 6: Inner tube 7: Female screw 8: Window 9: Locking protrusion 10: Container body 11: Mouth Cylindrical portion 12: Male thread 20: Nozzle portion 21: Inner mandrel 22: Outer mandrel 25: Cylindrical channel 26: Reduced diameter channel 27: Vertical channel 29: Merging channel 30: Shut-off pin 30t: Conical tip 31 : Pin gate 40 : Mold 41 : Pin gate 42 : Cavity 42a : Ring forming part 42b : Intermediate wall part 42c : Top wall forming part 42d : Connecting piece forming part Ax : Central axis M : Scale line R : Transparent resin Ra : Coloring Resin Rb: Transparent resin a: Section b: Section C: Section

Claims (5)

A capped cylindrical meter made of opaque colored resin (Ra), having a top wall (2) and a cylindrical side wall (3) hanging down from the outer edge of the top wall (2). A cap,
A measuring cap characterized in that the side wall (3) is provided with a window (8) made of transparent resin (Rb). 2. The metering cap according to claim 1, wherein the window portion (8) is formed in the form of a vertical band with respect to the side wall (3), or over half or the entire circumference. 3. The measuring cap according to claim 1, wherein the scale line (M) is provided on one or both of the side wall (3) and the window (8). 4. The measuring cap according to claim 3, wherein the scale line (M) is formed of a whitening line utilizing a whitening phenomenon. 3. The metering cap according to claim 1, wherein the lower end of the side wall (3) is provided with a tamper-evident ring (4) connected via a plurality of breakable connecting pieces (5).

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