JP2002104476A - Beverage container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a beverage container in which a discrimination whether or not a cap fastening action against a bottle is in an appropriate range can be carried out by a nondestructive inspection without a useless manner, but in fast and accurate manner. SOLUTION: There is provided a beverage container comprised of a bottle 1 formed with a male thread 4a at an outer circumferential surface of a bottle port 3, and a cap 2 formed with a female thread 4b threadably engaged with the male thread 4a at an inner circumferential surface of a peripheral wall 6. A mark 8a indicating a starting segment of the male thread 4a is arranged at a position where it can be seen from outside of the bottle 1. A mark 8b indicating a starting segment of the female thread 4b is arranged at a position where it can be seen from outside of the cap 2. An angle θ formed by both markings 8a, 8b is measured and a discrimination whether or not a wind fastening of the cap 2 against the bottle 1 is in an appropriate range is carried out without opening the plug.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a bottle having a male screw formed on the outer peripheral surface of a bottle mouth, and a cap having a female screw formed on the inner peripheral surface of the peripheral wall to be screwed with the male screw. The present invention relates to a beverage container.

[0002]

2. Description of the Related Art In a beverage container of this kind, if the cap is not tightly tightened (tightening angle) with respect to the bottle, the sealing performance is deteriorated, which causes a liquid leak. The torque required for the stopper increases, making it difficult for the purchaser to open the cap.

[0003] Therefore, in a production line in which the capping is automatically performed from filling of drinking water, the cap is tightly wound so that the opening torque is substantially constant. In this case, the angle to which the cap is rotated with respect to the bottle to obtain the opening torque in a desired range differs depending on the maker, production lot, and the like of the bottle and the cap. Then, for a specific bottle, in a certain cap group, for example, 360
When rotating by +130 degrees (total 490 degrees) and in another cap group, for example, by rotating by 360 degrees +160 degrees (total 520 degrees), tightening is performed properly and the opening torque falls within a desired range. Since the tightening angle required to obtain the desired range of opening torque can be obtained experimentally in advance, in the production line, the plugging operation is performed by controlling a closing machine or the like so as to obtain such a result. I have.

[0004] However, there is a possibility that variation in the opening torque may occur due to errors in the tightening torque due to the capping machine, temperature conditions, and the like. It is necessary to determine whether or not the process is performed, and to perform the process management.

Conventionally, this operation has been performed according to the following procedure. That is, after writing the first mark indicating the cap stop position with a writing instrument such as a felt-tip pen over the bottle and the cap of the extracted product, once removing the cap, the female screw is positioned at a position visible from the outside on the cap side. A mark indicating the start portion is entered, and a mark indicating the start portion of the male screw is entered at a position visible from the outside on the bottle side. Thereafter, the cap is again tightened to a position where the first mark matches. In this state, by measuring the angle between the mark on the cap side and the mark on the bottle side, it is determined whether or not the tightening of the cap around the bottle is in an appropriate range.

However, in the above-mentioned conventional example, since the destructive inspection is performed by opening the cap of the extracted product and performing the measurement, there are many wastes, and further, the first mark is entered, the opening and closing are performed in the measurement of the tightening angle. Since many manual operations such as marking the start of female and male threads and re-tightening the cap are required, it takes a long time to measure, and the start of female and male threads is visually checked. There is a possibility that individual differences may occur due to hand shake or the like at the time of filling in a mark, and there is a problem that it is difficult to secure measurement accuracy.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and does not determine whether or not the cap is tightly wound around the bottle in an appropriate range. An object of the present invention is to provide a beverage container that can be quickly and accurately performed without waste by a destructive inspection.

[0008]

The technical measures taken by the present invention to solve the above-mentioned problems are as follows.
That is, the invention according to claim 1 includes a bottle in which a male screw is formed on an outer peripheral surface of a bottle mouth, and a cap in which a female screw to be screwed with the male screw is formed on an inner peripheral surface of a peripheral wall. In the beverage container, a mark indicating the start of the male screw is provided at a position visible from the outside of the bottle, and a mark indicating the start of the female screw is provided at a position visible from the outside of the cap. It is characterized in that by measuring, it is determined whether or not the tightening of the cap on the bottle is in an appropriate range without opening the bottle.

According to a second aspect of the present invention, a top surface of a circular flange formed at a lower end portion of the bottle mouth has a triangular shape in a plan view showing a start portion of a male screw, and the upper surface is lower outward in the radial direction of the bottle mouth. The mark is provided so that the vertex thereof is aligned with the outer peripheral surface of the circular flange portion, while the knurled vertical groove group on the outer peripheral surface of the peripheral wall of the cap is located outside the start portion of the female screw. By filling the lower end of the vertical groove, a mark indicating the start of the female screw is provided.

The invention according to claim 3 is characterized in that a number of marks are provided at predetermined angular intervals on the left and right of the mark indicating the start of the female screw at a position visible from the outside on the cap side. I have.

According to the above configuration, it is possible to determine whether or not the cap is fastened to the bottle without opening the cap, so that the measuring time can be shortened and the product extracted for the measurement can be shortened. Since there is no need to discard the bottle, waste can be eliminated.In addition, a mark indicating the start of the male screw is provided in a position visible from the outside of the bottle in advance, and the start of the female screw is started in a position visible from the outside of the cap. Since the marks indicating the parts are provided, there is no possibility that individual differences due to the visual confirmation of the start portions of the female and male screws and hand shake at the time of filling the marks are eliminated, and it is easy to secure the measurement accuracy.

In particular, according to the second aspect of the present invention, the mark on the bottle side is a triangle in plan view, and the apex of the mark coincides with the outer peripheral surface of the circular flange formed at the lower end of the bottle mouth. It is easy to read the angle scale with a protractor,
Nevertheless, since the mark does not protrude on the outer peripheral surface of the circular flange, there is no risk that the purchaser turns the cap to open and close the cap, so that there is no danger of the finger being hung on the mark and the cap or bottle being molded in the molding die. Marks can be formed only by engraving a part of the surface, and advantages such as easy and economical implementation can be obtained.

According to the third aspect of the present invention, since a large number of marks are provided at predetermined angular intervals on the left and right of the mark indicating the start portion of the female screw at a position visible from the outside on the cap side with the center as the center. You can read the angle without having to do it.

In the present invention, the starting portions of the female screw and the male screw may be the positions at which the screw is started to be cut, and the female screw gradually rising from the inner peripheral surface of the cap peripheral wall, and the bottle mouth. It may be the position where the male screw gradually rising from the outer peripheral surface actually starts screwing, that is, the effective portion of the screw.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show an example of a beverage container according to the present invention. This beverage container is generally called a PET bottle, and is made of plastic bottle 1
And a plastic cap 2. A male screw 4 a is formed on the outer peripheral surface of the bottle mouth 3 of the bottle 1, and a circular flange 5 is formed at the lower end of the bottle mouth 3.
A non-slip vertical groove group 7 is formed on the outer peripheral surface of the peripheral wall 6 of the cap 2 by knurling, and a female screw 4b screwed with the male screw 4a is formed on the inner peripheral surface of the peripheral wall 6.

A plan view showing the start portion of the male screw 4a (in the illustrated example, the starting position of cutting the male screw 4) on a position visible from the outside of the bottle 1 side, specifically, on the upper surface of the circular flange 5. A mark 8a that is triangular and that is inclined so that the upper surface becomes lower outward in the radial direction of the bottle mouth 3 is provided in a state where the apex P coincides with the outer peripheral surface S of the circular flange 5 as shown in FIG. I have.

At the position visible from the outside of the cap 2 side, specifically, at the lower end of the outer peripheral surface of the peripheral wall 6, a mark indicating the start of the female screw 4b (in the illustrated example, the starting position of cutting the female screw 4b). 8b are provided. As shown in FIG. 1, the mark 8b is formed by filling the lower end of one vertical groove 7a located outside the start portion of the female screw 4b in the vertical groove group 7.

By measuring the angle formed by the marks 8a and 8b, it is determined whether or not the cap 2 is tightly wound around the bottle 1 without opening the cap. is there.

In measuring the angle formed by the marks 8a and 8b, various measuring instruments can be used.
As shown in FIGS. 4 and 5, using a protractor 10 having a hole 9 into which the cap 2 fits in the center, the reference position a written on the edge of the hole 9 is aligned with the mark 8 b on the cap 2 side. If the vertex P of the mark 8a forming a triangle in a plan view is read using the angle scale b, the angle scale b can be easily read, and the angle θ formed by both marks 8a and 8b can be accurately measured.

In general, in this type of beverage container, the cap 2 is set at 360 ° + 130 to the bottle 1.
Since it is common to set a desired opening torque by rotating by 160 degrees (490 to 520 degrees in total), the angle θ between the marks 8a and 8b is set.
However, for example, as shown in FIG. 5, when 145 degrees is indicated, this value alone indicates whether the cap 2 is tightly wound by 145 degrees or 360 degrees + 145 degrees (total of 505 degrees
Degree) It cannot be determined whether or not the cap is tightened. However, in reality, if the cap 2 is rotated only 145 degrees with respect to the bottle 1, the cap 2 rises by one pitch of the screw in the axial direction. Since the cap 2 has looseness, it can be easily determined that the angle is not 360 degrees + 145 degrees (a total of 505 degrees), and there is actually no problem at all.

According to the above configuration, it is possible to determine whether or not the cap 2 is tightly wound around the bottle 1 without opening the cap, so that the measurement time can be shortened and the sample can be removed for measurement. Since there is no need to dispose of the product, waste can be eliminated.
A mark 8a indicating the start of the male screw 4a is provided at a position visible from the outside of the bottle 1 and a mark 8b indicating the start of the female screw 4b is provided at a position visible from the outside of the cap 2; There is no possibility of individual differences due to visual confirmation of the start portion of the screw, hand shake at the time of marking, and the like, and measurement accuracy can be easily secured.

Particularly, in the illustrated example, the mark 8 on the bottle 1 side is used.
Since a is a triangle in a plan view and the vertex P coincides with the outer peripheral surface S of the circular flange portion 5 formed at the lower end of the bottle mouth 3, it is easy to read the angle scale b with the protractor 10; In addition, since the mark 8a does not protrude from the outer peripheral surface of the circular flange 5, there is no possibility that the purchaser turns his / her cap 2 to open and close the cap 2 by injuring his / her finger on the mark 8a.
On the bottle 1 side, a mark 8a is formed on the upper surface of the circular flange 5 formed at the lower end of the bottle opening 3 so as to be triangular in a plan view and inclined so that the upper surface becomes lower outward in the radial direction of the bottle opening 3. And, on the cap 2 side, a group of longitudinal grooves 7 by knurling
Since the mark 8b is formed by filling the lower end of the specific vertical groove 7a, the marks 8a and 8b can be formed only by engraving a part of the molding surface of the molding die of the bottle 1 or the cap 2. And can be implemented easily and economically.

6 to 8 show other examples of the beverage container according to the present invention. This beverage container has a large number of marks 8 at predetermined angular intervals on the left and right of the mark 8b indicating the start of the female screw 4b at a position visible from the outside on the cap 2 side.
The feature is that c is provided.

More specifically, the peripheral wall 6 of the cap 2
The start of the female screw 4b is indicated by filling the lower end of one vertical groove 7a located outside the start of the female screw 4b in the group of vertical grooves 7 formed by knurling on the outer peripheral surface of the female screw 4b. By forming the mark 8b and filling the lower ends of a plurality of (three in the example shown) longitudinal grooves located on the left and right sides thereof, the marks 8b are continuously arranged at a predetermined angle γ in the circumferential direction, and Numerous marks 8c of different heights and in a stepped shape are formed over substantially the entire circumference of the cap 2. The marks 8a on the bottle 1 side are shown in FIGS.
This is the same as the embodiment shown in FIG.

According to the above configuration, the angle formed by the marks 8a and 8b can be measured by using a protractor as in FIGS. 4 and 5, but the angle indicated by each mark 8c can be measured. Since γ is constant (a known angle set in advance), the mark 8a on the bottle 1 side and the mark 8b on the cap 2 side
By counting the number of the marks 8c located between them, the angle formed by the marks 8a and 8b can be known, and measurement by a protractor is unnecessary.

When the angle γ of the mark 8c is small, the mark 8
The length of c in the circumferential direction is short, making it difficult to count the number of marks 8c. If the angle γ is too large, the reading of the mark 8c corresponding to the mark 8a on the bottle 1 side will be inaccurate. Is in the range of 5 to 50 degrees (preferably 1
(Approximately 0 degrees). In the illustrated example, the mark 8c is not formed over the entire circumference of the cap 2 and there is a vertical groove without the mark 8c. However, the number of the vertical grooves formed by knurling and the angle γ of each mark 8c are appropriately adjusted. , It is possible to form the mark 8c with a constant angle γ over the entire circumference of the cap 2.

In each of the above-described embodiments, the cap 2 includes, as the cap 2, a cap body 11, a pill fur proof band 13 connected to the lower portion of the peripheral wall 6 through a number of breakable bridges 12, and a cap 2. A pill fur proof cap is shown, which is formed of a packing 14 fitted into the main body 11 and held in a state in which relative movement in the axial direction and around the axial center is possible. The present invention can be applied to any type of cap 2. Therefore, the cap 2 according to the present invention is not limited to the pill fur proof cap alone.

[0028]

As described above, according to the present invention, it is possible to quickly and accurately determine whether or not the tightening of the cap around the bottle is within an appropriate range without waste by nondestructive inspection. .

[Brief description of the drawings]

FIG. 1 is an enlarged perspective view of a main part of a beverage container according to the present invention.

FIG. 2 is a side view of a main part of the beverage container.

FIG. 3 is an enlarged cross-sectional view of a main part showing a mark on the bottle side.

FIG. 4 is an explanatory diagram of a measuring method.

FIG. 5 is an explanatory diagram of a measuring method.

FIG. 6 is a side view of a main part showing another example of the beverage container.

FIG. 7 is a schematic plan view showing a relationship between a group of vertical grooves formed on the cap by knurling and marks.

FIG. 8 is a partially expanded enlarged view of a cap.

[Explanation of symbols]

1 bottle, 2 cap, 3 bottle opening, 4a male screw,
4b ... female screw, 8a, 8b ... mark.

Claims (3)

[Claims] 1. A beverage container comprising: a bottle having a male screw formed on an outer peripheral surface of a bottle mouth; and a cap having a female screw formed on an inner peripheral surface of a peripheral wall to be screwed with the male screw. A mark indicating the start of the male screw is provided at a position visible from the outside of the cap, a mark indicating the start of the female screw is provided at a position visible from the outside of the cap, and the angle formed by both marks is measured. A beverage container configured to determine whether or not the cap is tightly wound around a bottle without being plugged. 2. A mark, which is a triangular shape in a plan view showing a start portion of a male screw and is inclined such that the upper surface becomes lower outward in the radial direction of the bottle mouth, on the upper surface of a circular flange formed at the lower end of the bottle mouth. ,
While the vertex is provided so as to coincide with the outer peripheral surface of the circular flange, the lower end of the vertical groove located outside the start portion of the female screw is filled in a group of knurled vertical grooves on the outer peripheral surface of the peripheral wall of the cap. The beverage container according to claim 1, wherein the mark indicates a start portion of the female screw. 3. A method according to claim 1, wherein a number of marks are provided at predetermined angular intervals on the left and right of the mark indicating the start of the female screw at a position visible from the outside on the cap side. The container for beverages according to any one of the preceding claims.