JPH0549538B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a synthetic resin bottle having a petaloid type pressure-resistant bottom structure, and a position that automatically achieves rotational alignment of the bottle. It relates to an alignment method, and more specifically, to a bottle that can extremely easily and reliably achieve alignment along the circumferential direction of the bottle, and that allows this alignment operation to be achieved reliably and accurately. The purpose is to donate the body.

[Conventional technology]

Conventionally, positioning along the circumferential direction of bottles, including synthetic resin bottles, has been done by creating alignment recesses, protrusions, or even printing on a part of the bottle, mainly on the bottom where it is difficult for people to see. The above-mentioned recesses, protrusions, and marks are detected while rotating the bottle, thereby achieving alignment along the circumferential direction of the bottle.

[Problem that the invention seeks to solve]

Of the recesses, protrusions, and marks that serve as standards for positioning the bottle, the recesses and protrusions are attached to the bottle at the same time as the bottle is formed, so it is troublesome to attach them. Although there is no risk of inconveniences such as the markings becoming distorted or the marking position being incorrect, marks that are pasted or printed on the surface of a molded bottle require an independent pasting or printing process. Therefore, not only is it difficult to handle the bottle, but there is also the risk that the circumferential position of the mark on the bottle surface may be misaligned, which is a serious problem.

Therefore, in order to position the bottle in the circumferential direction, it is effective to integrally form a recess or a convex part on the bottle. Considering the original appearance, it is completely unnecessary, and in some cases, it can seriously damage the appearance of the bottle, become a hindrance to handling the bottle, and even damage the structure of the mold device that forms the bottle. There was a problem that made it unnecessarily complicated.

In particular, in the case of a synthetic resin bottle with a petaloid type pressure-resistant bottom structure, the outer surface of the bottom has irregularities that conform to the petaloid structure.
Even if the unevenness for positioning is formed along the circumferential direction of the bottle, it is difficult to distinguish between the unevenness of the petaloid structure and the unevenness for alignment, making it extremely difficult to achieve reliable and smooth alignment. was.

[Means for solving problems]

The present invention has been devised to solve the problems, drawbacks, and inconveniences of the conventional examples described above, and the present invention has been devised to solve the problems, drawbacks, and inconveniences of the conventional examples. The mechanical dimensions of the vertical grooves are set to different values from the mechanical dimensions of the remaining longitudinal grooves, and the positioning along the circumferential direction of the bottle body is performed according to the position of one selected longitudinal groove with different dimensions. It was designed to be achieved.

Hereinafter, the present invention will be described with reference to drawings showing embodiments of the invention.

The synthetic resin bottle 1 according to the present invention is a synthetic resin biaxially stretched blow-molded bottle with a petaloid type pressure-resistant bottom structure, and includes a plurality of bulging legs 4 and the same number of bulging legs 4. The structure of one vertical groove 5a selected from among the plurality of vertical grooves 5 of the bottom part 3, which is large and forms a petaloid structure with the vertical grooves 5 formed between the bulging leg parts 4, The width of this vertical groove 5a is set to a value different from the width of the other vertical grooves 5b.The height position of the upper end of this vertical groove 5a is set to a different height position from the height position of the upper end of the other vertical grooves 5b. The depth of the vertical groove 5a is set to a value different from the depth of the other vertical grooves 5b.

That is, the bottle 1 according to the present invention has a petaloid structure on the bottom 3, so that one of the vertical grooves 5a selected from among the plurality of vertical grooves 5 formed from the bottom 3 to the body 2 can be machined. For example, the vertical groove 5b has a mechanical dimension set to a value different from the mechanical dimension of the remaining vertical grooves 5b.

Since the plurality of vertical grooves 5 formed in the bottom part 3 having this petaloid structure are located between the bulging legs 4, they naturally form unevenness on the surface of the bottle body 1. The basic technical idea of the present invention is to use the unevenness formed by the vertical grooves 5 as a reference portion for positioning in the circumferential direction of the bottle body 1. In order to distinguish the groove 5a from the remaining vertical grooves 5b, the mechanical dimensions of the vertical groove 5a are set to values different from those of the other vertical grooves 5b.

[Effect]

Various methods can be considered for positioning the bottle 1 according to the present invention in the circumferential direction, but the simplest and surest method will be described below.

That is, the simplest and most reliable method of positioning the bottle 1 according to the present invention along the circumferential direction is to align the bottle 1 along the circumferential direction by aligning the bottle 1 in the vertical grooves 5 of the petaloid structure of the bottom 3. A synthetic material having a petaloid type pressure-resistant bottom structure formed by setting at least one of the width, height, and depth of a selected vertical groove 5a to a value different from that of the other vertical grooves 5b. Due to the difference in the width, height, and depth of the resin biaxial stretch blow-molded bottle 1 and the longitudinal groove 5a, which are set to different values,
A detection body 9 that is detected separately from other vertical grooves 5b,
The bottle 1 is relatively rotationally displaced around the imaginary central axis M of the bottle 1 as a rotation axis, and the relative rotational displacement between the bottle 1 and the detection body 9 is stopped in accordance with the detection of the vertical groove 5a by the detection body 9. Thus, the positional relationship between the longitudinal groove 5a and the detection body 9 along the rotational direction is set constant.

Detection of the vertical groove 5a by the detection body 9 can be accomplished by detecting the difference in mechanical dimensions between the vertical groove 5a and the vertical groove 5b, and the detection means may be mechanical means or electronic means. It's okay to be.

〔Example〕

Various structures can be considered to set the mechanical dimensions of the vertical groove 5a to different values from the mechanical dimensions of the other vertical grooves 5b. This will be explained by illustrating the position and depth separately.

In the embodiment shown in FIGS. 2 and 3, the longitudinal groove 5
This figure shows a case in which the groove width of the vertical groove 5b is larger than that of the other vertical grooves 5b.
This shows an example of a structure in which the groove width of a portion is made larger than the groove width of the other longitudinal grooves 5b at the same height by forming a wide portion 6 in this portion.

In this way, the wide part 6 which is the upper end of the vertical groove 5a
Since the groove width of the vertical groove 5b is larger than the groove width of the upper end of the other vertical groove 5b, the detection body 9 can reliably detect the vertical groove 5a due to this difference in groove width.

Furthermore, in the embodiments shown in FIGS. 4, 5, and 6, the position of the upper end of the vertical groove 5a is different from that of the other vertical groove 5b.
This shows an example of a structure in which an extension 7 is formed at the upper end of the vertical groove 5a so as to be located higher than the upper end.

In this way, the extension part 7 which is a part of the vertical groove 5a
is located at the lower end of the body 2 along the circumferential direction where no other vertical groove 5b is located, so the detection body 9 reliably detects the vertical groove 5a by detecting this extension 7. You will be able to do that.

In the embodiment shown in FIGS. 7 and 8, by forming a deep groove portion 8 in a part of the vertical groove 5a, the depth of the vertical groove 5a is made greater than the depth of the other vertical groove 5b. This also shows an example of a structure in which the structure is deeply molded.

In this case as well, the detection body 9 can reliably distinguish the vertical groove 5a from other vertical grooves 5b due to the difference in the depth of the grooves, thereby reliably detecting the vertical groove 5a. become.

Note that the structural example of the bottle 1 described above is a case in which one of the mechanical dimensions of the width, height, and depth of the vertical groove 5a is formed to a different value from the mechanical dimensions of the other vertical groove 5b. However, setting the mechanical dimensions to different values is not limited to width, height, and depth, but rather setting two or all of the mechanical dimensions to different values. Needless to say, it may be formed into a value.

For example, in the embodiment shown in FIGS. 4 to 6, the depth of a part of the vertical groove 5a is increased in order to form the extension part 7, but this enlarged vertical groove The depth of the groove 5a may be detected by the detection body 9.

In this way, various structural examples can be considered in which the mechanical dimensions of the vertical groove 5a are set to different values from the mechanical dimensions of the other vertical grooves 5b. What must be noted when setting the mechanical dimension of 5b to a different value is that the vertical groove 5 is a part of the petaloid structure.

That is, since the vertical groove 5 is a part of the petaloid structure which is a pressure-resistant structure, the mechanical dimensions of the vertical groove 5a are made to be significantly different from the mechanical dimensions of the other vertical grooves 5b, so that the pressure-resistant capacity of the bottom part 3 is increased. This means that it must never be allowed to deteriorate.

For this reason, the mechanical dimensions of the vertical groove 5a are
Suitable portions to be molded with mechanical dimensions different from those of b are near the boundary between the body 2 and the bottom 3, which is as far away as possible from the center of the bottom 3, where high internal pressure resistance is required. It turns out that there is.

Moreover, in this way, the detection target portion of the vertical groove 5a is
Being located near the boundary between the bottom part 3 and the body part 2 means that the detection target part of the vertical groove 5a is exposed on the side of the bottle body 1. It becomes easier to install the detection body 9, and it also becomes easier to perform the detection operation of the detection target portion of the vertical groove 5a by the detection body 9.

Note that the bottle 1 is not limited to the one-piece structure shown in FIGS. 1 to 8, and as shown in FIG. 10, a pressure-resistant bottle body,
a base cup that gives the lower part a desired external shape and provides petaloid-type legs;
The bottle 1 may have a beer barrel shape as a whole by assembling an overcap to give the upper part a desired external shape. The bottle 1 shown in FIG. 10 is a relatively large beer container, and since the bottle 1 is large, the handle is attached to the body 2 of the bottle 1 for easy handling. The handle is often attached to the bottle body 1 in a protruding state, and the positioning for attaching the handle to the bottle body 1 and the positioning for attaching the label to the surface of the body 2 avoiding the handle attachment point are automatically performed. It is extremely advantageous to be able to achieve this objectively. In the case of the embodiment shown in FIG. 10, similarly to the embodiments shown in FIGS. 4 to 6, an extension 7 is provided at the upper end of the vertical groove 5a.
It is constructed by molding.

FIG. 9 shows an example of the detection operation of the detection target portion of the vertical groove 5a by the detection body 9. The detection body 9 is immovably arranged and fixed at a fixed position, and the bottle 1 is held on a turntable 10 that rotates in a constant direction at a constant speed.

At this time, it goes without saying that the detection body 9 is fixed at a position where it can face the detection target portion of the longitudinal groove 5a formed in the bottle 1.

In this state, the turntable 10 is rotated so that the central axis M of the bottle body 1 and the axis of its rotating shaft coincide with each other.

When the bottle 1 rotates according to the rotational movement of the turntable 10 and the detection target portion of the vertical groove 5a formed in the bottle 1 is detected by the detection body 9, the Immediately stop the rotation of the turntable 10 according to the detection signal,
In this way, alignment along the circumferential direction of the bottle 1 is achieved.

As means for detecting the detection target portion of the longitudinal groove 5a by the detection body 9, there are optoelectronic means using light and mechanical means for directly detecting the irregularities on the surface of the bottle 1 as mechanical displacement. As in the embodiment shown in Figures 6 to 6, when there are no other uneven parts on the outer circumferential surface of the bottle 1 at the same height position, and there is only the extension part 7, which is the detection target part, this The detection body 9 employs a mechanical means that uses a piece body that fits into the extension part 7 with the force of a spring and engages strongly.
This is extremely advantageous because it simplifies the construction and reduces the outlay required for the detection components.

[Effects of the Invention] As is clear from the above description, the present invention provides mechanical means for forming one longitudinal groove selected from a plurality of longitudinal grooves constituting a petaloid structure, and for connecting the other longitudinal grooves to one another. Since the mechanical dimensions are simply molded to values different from those of the bottle, the detection target part can be molded without compromising the basic structure, appearance, and function of the bottle. It can be easily and easily carried out by making only slight changes to the body molding mold, and since it detects the difference in mechanical dimensions of uneven parts, the detection operation can be achieved smoothly. It exhibits many excellent effects such as being able to be accurate and reliable.

[Brief explanation of drawings]

FIG. 1 is a front view showing an example of a pressure-resistant bottle made of synthetic resin in which the present invention is implemented. Figures 2 and 3
The figures are partial views showing a configuration example in which the width of selected vertical grooves is increased, which is an embodiment of the present invention, and FIG. 2 is a bottom side view, and FIG. 3 is a bottom view. 4, 5, and 6 are partial views showing selected longitudinal grooves having increased heights according to other embodiments of the present invention; FIG. 4 is a bottom side view, and FIG. FIG. 5 is a bottom view, and FIG. 6 is a vertical sectional view of the bottom. 7 and 8 are partial views showing an example of a structure in which the depth of selected vertical grooves is increased, which is still another embodiment of the present invention, FIG. 7 is a bottom vertical sectional view, and FIG. is a bottom view. FIG. 9 is a front view showing an embodiment of the method of the present invention. FIG. 10 is an overall perspective view showing still another embodiment of the bottle according to the present invention. Explanation of symbols: 1; Bottle; 2; Body; 3; Bottom;
4; Swollen leg portion, 5, 5a, 5b; Vertical groove, 6; Wide portion, 7; Extension portion, 8; Deep groove portion, 9; Detector, 1
0; Turntable.

Claims (1)

[Scope of Claims] 1. A biaxially stretched blow-molded bottle made of synthetic resin having a petaloid type pressure-resistant bottom structure, which has a bottom portion 3.
The structure of one vertical groove 5a selected from among the plurality of vertical grooves 5 constituting the petaloid structure is such that the width of the vertical groove 5a is set to a value different from the width of the other vertical grooves 5b. 5a to the other vertical groove 5.
A synthetic resin bottle having at least one of the following: - set at a height different from the height position of the upper end of the vertical groove 5a, and set the depth of the vertical groove 5a to a value different from the depth of the other vertical groove 5b. . 2. The width of one vertical groove 5a selected from among the plurality of vertical grooves 5 forming the petaloid structure of the bottom part 3,
2 made of synthetic resin and having a petaloid-type pressure-resistant bottom structure that is molded with at least one value of height and depth set to a value different from that of the other vertical grooves 5b.
The axially stretched blow-molded bottle 1 and the selected longitudinal groove 5a are separated from other longitudinal grooves 5 by differences in at least one of the width, height, and depth of the longitudinal groove 5.
The detection object 9 to be detected separately from the bottle 1
The bottle body 1 and the detection body 9 are relatively rotationally displaced around an imaginary central axis M as a rotation axis, and the relative rotational displacement operation between the bottle body 1 and the detection body 9 is stopped in accordance with the detection of the vertical groove 5a by the detection body 9. In this method, the positional relationship between the vertical groove 5a and the detection body 9 along the rotational direction is set constant.