JP2021020681A - cap - Google Patents

Abstract

To provide a cap which can form highly visible display, without obstructing release property and handleability, while not incurring increase of the number of manufacturing steps.SOLUTION: A cap has a display body 14 constituted by a projecting part or a recessed part for displaying characters, symbols, or diagrams on the surface. At least a part of the display body 14 is formed by collectively arranging elements 15 which are the projecting part and the recessed part each having the longitudinal length 15a and the width 15b in a range of 10-200 μm.SELECTED DRAWING: Figure 1

Description

The present invention relates to, for example, a cap provided with a display of characters, symbols, figures, etc. on the outer surface.

Conventionally, for the purpose of sales promotion and the like, characters, symbols, figures and the like are displayed on the outer surface of the cap (Patent Documents 1 and 2).

Japanese Unexamined Patent Publication No. 2001-114312 Japanese Unexamined Patent Publication No. 2016-41595

However, in the above-mentioned conventional cap, it is general that the cap after being molded by using a mold is subjected to laser processing, printing, or the like to form the above-mentioned display. In this case, a step for forming the display is performed. There is a problem that extra is required and the manufacturing man-hours increase. Therefore, it is conceivable to provide a concave portion or a convex portion for forming the indication on the mold so that the cap having the indication can be formed, but in this case, the concave portion or the convex portion is shallow (low). The visibility of the display on the cap after molding is lowered, and conversely, if it is deep (high), it may hinder the releasability and handleability.

The present invention has been made in consideration of the above-mentioned matters, and an object of the present invention is to display excellent visibility without hindering releasability and handleability while not accompanied by an increase in manufacturing man-hours. Is to provide a cap that can form.

In order to achieve the above object, the cap according to the present invention is a cap provided with a display body composed of convex portions or concave portions for displaying characters, symbols or figures on the surface of the display body. At least a part thereof is formed by collectively arranging elements having protrusions or recesses having a vertical width and a horizontal width in the range of 10 to 400 μm (claim 1).

In the cap, the display body has a plurality of regions, and the shape or orientation of the element may be different for each region (claim 2).

The cap has a knurled region on the outer peripheral surface in which a plurality of knurled ridges extending in the vertical direction are formed at intervals in the circumferential direction, and the height or depth of the display body provided in the knurled region is determined. It may be 1/10 or less of the maximum protruding height of the knurled mountain (claim 3).

On the other hand, in order to achieve the above object, the method for manufacturing a cap according to the present invention is the method for manufacturing a cap according to any one of claims 1 to 3, and is a recess for forming the display body. Alternatively, the cap is molded using a mold having a convex portion (claim 4).

According to the present invention, it is possible to obtain a cap capable of forming a display having excellent visibility without hindering releasability and handleability while not increasing the manufacturing man-hours.

That is, in the cap of the invention according to each claim of the present application, the visibility of the display body can be improved by providing the display body with a region formed by collectively arranging elements having a predetermined size. As a result, by forming each element relatively shallowly, it is possible to make it difficult for the mold releasability and the handleability to be hindered.

In the cap of the invention according to claim 2, the display body can exert a changing effect such that the most conspicuous area changes depending on the direction in which the cap is viewed.

In the cap of the invention according to claim 3, when the cap is screwed to the container mouth portion, the display body can be less likely to interfere with the serration fitting between the capping chuck and the knurled ridge.

In the method for manufacturing a cap according to claim 4, it is possible to manufacture a cap having a display body as in the case where the display body is not provided, and it is possible to avoid an increase in manufacturing man-hours.

(A) and (B) are a perspective view and a vertical sectional view schematically showing a structure of a cap according to an embodiment of the present invention. It is explanatory drawing which shows the structure of the area of the display body of the cap schematicly. (A) and (B) are explanatory views schematically showing the configuration of the display body which is a convex portion and a concave portion provided in the knurled region of the cap.

Embodiments of the present invention will be described below with reference to the drawings.

The caps shown in FIGS. 1A and 1B are synthetic resin pilfer proof caps configured to openably close the mouth 1a of a container 1 such as a PET bottle, and each is made of synthetic resin. The shell 2 is provided with a packing 3 with a middle leg that is inserted into the shell 2 and seals the mouth portion 1a of the container 1.

The shell 2 is, for example, injection-molded or compression-molded with an olefin-based resin material such as polyethylene (PE) or polypropylene (PP). The shell 2 has a circular top wall 4 in a plan view, a skirt wall 5 hanging from the peripheral edge of the top wall 4, and tamper evidence connected to the lower end of the skirt wall 5 via a plurality of bridges 6. It has a band (hereinafter referred to as an TE band) 7, a locking portion 8 connected inwardly upward from the lower end of the TE band 7, and a packing guide portion 9 for lifting the packing 3 when the cap is opened. A cap screw portion 11 screwed to the container screw portion 10 formed on the outer peripheral surface of the container mouth portion 1a is formed on the inner surface portion of the skirt wall 5. In this example, the uppermost portion of the cap screw portion 11 is used as the packing guide portion 9.

The packing 3 has a top plate 12 in which the outer peripheral edge is in close contact with the upper end surface of the container mouth portion 1a, and a middle leg that extends downward from the peripheral edge portion of the top plate 12 and is hermetically fitted into the container mouth portion 1a at the time of closing. It has 13 and is molded from an olefin-based resin material such as PE or PP.

Then, in this example, characters, symbols or figures (for example, company name, product number and model number, advertising phrases and precautions, company logo mark, and design are enhanced on the top surface of the shell 2 (upper surface of the top wall 4). A display body 14 composed of convex portions or concave portions is provided to display such a pattern).

The display body 14 shown in FIG. 1A has a plurality of regions R, and specifically, a region R1 for displaying the characters "ABC" and an region R2 for displaying a plurality of triangular figures are specified. It is composed of an area R3 that displays a background (blank) that does not display the characters and the like.

Then, as shown in FIG. 2, each region R has a vertical width 15a and a horizontal width 15b in a range of 10 to 400 μm (a range that spreads from 10 μm square and fits in 400 μm square), preferably a range of 30 to 300 μm. The elements 15 which are convex portions or concave portions in a range of 50 to 250 μm are preferably collectively arranged and formed, and the shape or orientation of the elements 15 is different for each region R.

In this way, the display body 14 has a region R formed by collectively arranging the elements 15 having a predetermined size, so that the visibility of the display body 14 can be improved, and by extension, each element. By forming 15 relatively shallowly, it is possible to make it less likely to interfere with releasability and handleability. The present inventors have confirmed that the display body 14 of this example has higher visibility when the shell 2 is a dark color such as black than when it is white.

Further, by making the shape or orientation of the element 15 different for each region R, the display body 14 exerts a changing effect such that the most conspicuous region R changes depending on which direction the top surface of the shell 2 is viewed. You can also.

Here, the cap of this example described as described above can be molded by injection molding or compression molding using a mold having a concave portion or a convex portion for forming the display body 14, and in this case, the display body. The cap of this example having the display body 14 can be manufactured as in the case where the 14 is not provided, and an increase in manufacturing man-hours can be avoided. The concave or convex portion of the mold can be formed by using, for example, a laser processing machine. When the cap of this example is injection-molded, the display body 14 also has the effect of improving the slipperiness of the cap and making it difficult for the cap to be scratched during line transportation or the like. On the other hand, when the cap is compression-molded, the display body 14 also has an effect of suppressing the occurrence of molding defects (cold marks).

It should be noted that the present invention is not limited to the above-described embodiment, and can be variously modified and implemented without departing from the gist of the present invention. For example, the following modification examples can be given.

The cap of the above embodiment is a so-called two-piece cap, but the cap is not limited to this, and may be a one-piece cap in which the packing 1 is integrated with the shell 2.

In the example of FIG. 1A, the areas R1 and R2 indicating characters and the like are not overlapped with each other, but the areas R indicating characters and the like may be overlapped with each other. For example, when the region R1 and the region R2 are partially overlapped to form the region R12, the element 15 of the overlapping portion (region R12) has a shape or orientation different from that of each of the elements 15 of the region R1 and the region R2. Can be considered.

In the example of FIG. 1A, the display body 14 is formed only on the top surface of the shell 2, but the display body 14 is not limited to this, and the display body 14 is mounted on the outer surface (side surface) of the cap such as the outer peripheral surface (side surface) of the shell 2. It may be formed on other parts or on the inner surface of the cap.

For example, as shown in FIGS. 1A and 1B, a cap having a plurality of knurled ridges 16 extending in the vertical direction formed at intervals in the circumferential direction on the outer peripheral surface of the cap (shell 2). When the display body 14 is formed in the knurled region, as shown in FIGS. 3A and 3B, the height of the display body 14 provided in the knurled region (as shown in FIG. 3A). The maximum protruding height of the knurled ridges 16 (plural knurled ridges 16 having different heights) determines the display body 14 (when the display body 14 is a convex portion) or the depth (when the display body 14 is a concave portion as shown in FIG. 3B). If there is, it is preferably 1/10 or less, and more preferably 1/30 or less of the protruding height) h of the highest knurled mountain 16. Thereby, for example, when the cap of this example is screwed to the container mouth portion 1a, the display body 14 can be less likely to interfere with the serration fitting between the capping chuck and the knurled ridge 16.

As an example, when the maximum protruding height h of the knurled mountain 16 is 300 μm, the height or depth of the display body 14 provided in the knurled region can be 10 μm, and the display body 14 provided on the outer peripheral surface of the TE band 7 It is conceivable that the height or depth is larger than this (for example, 15 μm), and the height or depth of the display body 14 provided on the top surface of the shell 2 is further larger (for example, 30 μm).

FIG. 2 shows an element 15 having an elongated shape of a regular hexagon, but the shape of the element 15 is not limited to this, and for example, a rhombus or a rectangle obtained by elongated a square or another regular polygon is elongated. It may have a rectangular shape or an elliptical shape. Here, in particular, when the shape of the element 15 is unified and only the direction of the element 15 is different due to the difference in the region R, the shape of the element 15 is made slender (for example, in order to exert the above-mentioned changing effect). It is preferable to make a regular polygon or an elongated shape of a circle), but if the shapes of the elements 15 are not unified, various shapes of the elements 15 can be adopted.

Needless to say, the above-mentioned modifications may be combined as appropriate.

1 Container 1a Mouth 2 Shell 3 Packing 4 Top wall 5 Skirt wall 6 Bridge 7 TE band 8 Locking part 9 Packing guide part 10 Container screw part 11 Cap screw part 12 Top plate 13 Midfoot 14 Display 15 Element 15a Vertical width 15b Width 16 Knurled mountain h Maximum protrusion height R area R1 area R2 area

Claims (4)

A cap provided with a display body composed of protrusions or recesses for displaying characters, symbols or figures on the surface.
At least a part of the display body is a cap formed by collectively arranging elements having protrusions or recesses having a vertical width and a horizontal width in the range of 10 to 400 μm, respectively. The cap according to claim 1, wherein the display body has a plurality of regions, and the shape or orientation of the element is different for each region. The outer peripheral surface has a knurled region in which a plurality of knurled ridges extending in the vertical direction are formed at intervals in the circumferential direction, and the height or depth of the display body provided in the knurled region is set to the height or depth of the knurled ridge. The cap according to claim 1 or 2, wherein the cap has a maximum protruding height of 1/10 or less. The method for manufacturing a cap according to any one of claims 1 to 3, wherein the cap is molded using a mold having a concave portion or a convex portion for forming the display body.