JPS6160432A - Bottle body made of synthetic resin and method of positioning said bottle body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] 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. More specifically, it relates to a bottle alignment method, and more specifically, a bottle that can extremely easily and reliably achieve positioning along the circumferential direction of the bottle, and that allows this positioning 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 1 synthetic resin + M bottles has been done by forming 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 mark being stuck or being placed in a wrong position, marks that are pasted or printed on the surface of a molded bottle require an independent pasting or printing process. This not only makes handling the bottle troublesome.

Occasionally, a serious problem may arise in which the circumferential position of the mark on the bottle surface is misaligned.

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 of the bottle, it is completely unnecessary, and in some cases, it can seriously damage the appearance of the bottle or become a hindrance to its handling.

Furthermore, there is a problem in that the structure of the mold device for molding the bottle becomes unnecessarily complicated.

In particular, synthetic (
In the case of the I-bottle, the outer surface of the bottom has irregularities that follow 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 longitudinal grooves are set to different values from the mechanical dimensions of the remaining longitudinal grooves, so that alignment along the circumferential direction of the bottle body is achieved according to the position of the selected one longitudinal groove that differs in this dimension. This is what I did.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to drawings showing one embodiment of the present invention.

The synthetic resin bottle 1 according to the present invention is a synthetic resin biaxially stretched blow-molded bottle having a petaloid dive 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 58 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.

(2) The width of this vertical groove 5a is set to a value different from the width of other vertical grooves 5b.

(2) The height position of the upper end of this vertical groove 58 is set to a different position from the height position of the upper end of the other vertical grooves 5b.

(2) The depth of this vertical groove 5a is set to a value different from the depth of the other vertical grooves 5b.

It is composed of at least one of the above and itself.

In other words, the bottle 1 according to the present invention has a petaloid structure at the bottom 3, so that one of the vertical grooves 5a selected from the plurality of vertical grooves 5 formed from the bottom 3 to the body 2 is formed.
The mechanical dimensions of the vertical grooves 5b are set to different values from the mechanical dimensions 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 leg parts 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 part for positioning the body 1 in the circumferential direction. 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]

Although nine different methods are possible for positioning the weir body 1 according to the above-mentioned invention along the circumferential direction, the simplest and surest method will be explained below.

That is, the simplest and most reliable method of positioning the weir body 1 according to the present invention along the circumferential direction is to align the weir body 1 according to the present invention in the circumferential direction. A petaloid type pressure-resistant bottom structure is formed by setting at least one of the width, height, and depth of the selected vertical groove 5a to a value different from that of the other vertical grooves 5b. a synthetic resin M biaxially stretched blow-molded body 1,
The edge i5a can be set to different values among the width, height and depth of the vertical groove 5,
b and the detection body 9 to be detected separately are relatively rotationally displaced about the imaginary central axis M of the weir body 1 as a rotation axis, and the t body 1 and the detection body 9 are By stopping the relative rotational displacement operation between the vertical groove 5a and the detection body 9, the positional relationship between the vertical groove 5a and the detection body 9 along the rotation direction is set constant.

Is the detection of the vertical groove 5a by the detection body 9 vertical? a5a and vertical groove 5
It is sufficient to detect the difference in mechanical dimensions from b.
The detection means may be mechanical means or electronic means.

〔Example〕

Various structures can be considered for setting the mechanical dimensions of the vertical groove 5a to values different from those of the other vertical grooves 5b, examples of which are the width of the vertical groove 5a and the height of the upper end. position,
Examples will be explained by depth.

The embodiment shown in FIGS. 2 and 3 shows a case in which the width of the vertical groove 58 is made larger than the width of the other vertical grooves 5b. The upper end of R5a, that is, the body 2 of the weir body 1
This shows a structural example in which the width of the vertical groove 58 located at the lower end of the vertical groove 58 is made larger than the groove width of the other vertical grooves 5b at the same height by forming a wide part 6 in this part. It is.

In this way, since the groove width of the wide portion 6, which is the upper end of the vertical groove 5a, is larger than the groove width of the upper end of the other vertical grooves 5b, the detection body 9 can reliably detect the vertical groove i5a due to the difference in groove width. This means that it can be detected.

Furthermore, the embodiments shown in FIGS. 4, 5, and 6 are as follows:
An extension part 7 is attached to the upper end of the vertical groove 5a so that the upper end of the vertical groove a5a is located higher than the upper end of the other vertical groove i5b.
This shows an example of a structure formed by molding.

In this way, the extension part 7 which is a part of the vertical groove 5a.

Since the detection body 9 is located at the lower end of the body 2 where no other vertical groove 5b is located along the circumferential direction, the detection body 9 can reliably detect the vertical groove 5a by detecting this extension 7. Become.

In the embodiment shown in FIGS. 7 and 8, the deep groove portion 8 is formed in a part of the vertical groove 5a.
8 shows a structure example in which the depth of the vertical groove 5b is deeper than the depth of the other vertical grooves 5b.

In this case as well, the detecting body 9 can reliably distinguish the vertical groove 5a from the other vertical grooves 5b due to the difference in the depth of the grooves, thereby reliably detecting the vertical groove 58. will be possible.

In addition, in the structural example of the weir body 1 described above, one of the mechanical dimensions of the vertical groove 5a is the width, height, and depth.

The case where the mechanical dimensions of the other vertical grooves 5b are formed to different values is shown, but setting the mechanical dimensions to different values is 1.
It goes without saying that the mechanical dimensions are not limited to one of the width, height and depth, but two or all of them may be formed to different values.

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 58 are set to different values from the mechanical dimensions of the other vertical grooves 5b. 5b
What must be noted when setting the mechanical dimensions to different values is that the vertical grooves 5 are a part of the petaloid structure.

In other words, since the vertical groove 5 is a part of the petaloid structure which is a pressure-resistant structure, is it vertical? X? j5a is thicker (different from the mechanical dimensions of the other vertical grooves 5b, and the bottom part 3
This means that we must never reduce the pressure resistance of the equipment.

Therefore, the center part of the bottom 3, which is required to maintain high internal pressure resistance, is suitable for molding with the mechanical dimensions of the vertical groove 5a (7) different from the mechanical dimensions of the other vertical grooves 5b. This means that it is located near the boundary between the trunk 2 and the bottom 3 as far away as possible.

Furthermore, the fact that the detection target portion of the vertical groove 5a is located near the boundary between the bottom 3 and the body 2 means that the detection target portion of the vertical groove 5a is exposed on the side of the weir body 1. This makes it easier to install the detector 9 on the weir body 1, and also makes it easier for the detector 9 to detect the detection target portion of the vertical groove 5a.

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, 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 vertical groove 5a formed in the weir body 1.

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

When the weir body 1 rotates according to the rotational movement of the turntable 10 and the detection target portion of the vertical groove 58 formed on the weir body 1 is detected by the detection body 9, the detection signal from the detection body 9 is immediately detected. The rotational movement of the turntable 10 is then stopped, thereby achieving positioning of the weir body 1 along the circumferential direction.

As means for detecting the detection target portion of the vertical 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 weir body 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 weir body 1 at the same height position, and there is only the extension part 7, which is the part to be detected,
Adopting a mechanical means using a bridge body that fits into the extension part 7 with the force of a spring and engages strongly simplifies the structure of the detection body 9 and reduces the cost required for detection. This is extremely advantageous.

〔Effect of the invention〕

As is clear from the above description, the present invention provides the following features:
Since the mechanical dimensions of this vertical groove are simply molded to different values from the mechanical dimensions of other vertical grooves, the detection target area can be detected without compromising the basic structure and appearance of the weir body. The detection target area can be molded easily and simply by making slight changes to the mold for molding the bottle, and the differences in mechanical dimensions of the uneven parts can be Since the detection operation is detected, the detection operation can be performed smoothly, and it can be made accurate and reliable, and many other excellent effects are exhibited.

[Brief explanation of drawings]

FIG. 1 is a front view showing an example of a pressure-resistant weir made of synthetic resin in which the present invention is implemented. 2 and 3 are partial views showing a configuration example in which the width of selected longitudinal grooves is increased, which is an embodiment of the present invention;
The figure is a bottom side view, and FIG. 3 is a bottom view. 4, 5, and 6 are partial views showing an example of a configuration in which the height of selected longitudinal grooves is increased, which is another embodiment of the present invention, and 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 a configuration example in which the depth of selected longitudinal grooves is increased, which is still another embodiment of the present invention, and 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. Explanation of the symbols 1: Bottle, 2: Body, 3: Bottom, 4: Swollen leg. 5, 5a, 5b; jQ groove, 6; wide part, 71 extension part. 8; deep groove portion, 9; detection object, 10; turntable. ; Bushi J Nakozudo 479 force 2 ri, a gu';'7/A

Claims (2)

[Claims] (1) A synthetic resin biaxially stretched blow-molded bottle with a petaloid type pressure-resistant bottom structure, in which a selected one of the plurality of longitudinal grooves (5) constituting the petaloid structure of the bottom (3) The structure of the two vertical grooves (5a) is as follows: [1] The width of the vertical groove (5a) is different from the width of the other vertical groove (5b); [2] The upper end of the vertical groove (5a) The height position of the other vertical groove (
5b) set at a position different from the height position of the upper end; [3] setting the depth of the vertical groove (5a) to a value different from the depth of the other vertical grooves (5b); A single synthetic resin bottle. (2) at least one value of the width, height and depth of one longitudinal groove (5a) selected from the plurality of longitudinal grooves (5) constituting the petaloid structure of the bottom (3); A synthetic resin biaxially stretched blow-molded bottle (1) having a petaloid type pressure-resistant bottom structure, which is molded with the value set to a value different from that of the other vertical grooves (5b), and the selected vertical groove (5b). 5a) is detected by distinguishing it from other vertical grooves (5b) by a difference in at least one of the width, height, and depth of the vertical groove (5); The bottle (1) is rotated relative to the imaginary central axis (M) of the bottle (1) as a rotation axis, and the bottle (1) and the detection body are rotated in accordance with the detection of the vertical groove (5a) by the detection body (9). (9) A method for positioning a bottle body, in which the relative rotational displacement operation with respect to the vertical groove (5a) and the detection body (9) is stopped, and the positional relationship between the longitudinal groove (5a) and the detection body (9) is set constant along the rotational direction.