JP4587169B2 - Plastic resin container - Google Patents

Description

  The present invention relates to a synthetic resin bottle container having a reduced pressure absorption function.

  As a bottle made of synthetic resin such as a plastic bottle having a reduced pressure absorption function, a polygonal tube bottle container represented by a square tube, which can easily obtain a large flat wall capable of exerting a high reduced pressure absorption force without difficulty. Are known.

  Of these polygonal bottle containers that are lightened, it is common to provide a circumferential rib with a circumferential groove structure to maintain the strength, but this circumferential rib increases the strength of the container body. However, there is an inconvenience that the vacuum absorption capability is hindered and permanent deformation may occur in the peripheral rib portion at the time of vacuum absorption deformation such as cooling.

As a conventional technique for solving this inconvenience, a crushing prevention rib portion including a discontinuous portion having no ribs is provided on a part of a lateral rib (circumferential rib) provided on a barrel portion of a polygonal tube bottle container. By providing the portion, there is one that increases the flexibility of the body portion provided with the peripheral rib, and thus prevents the permanent deformation due to the provision of the peripheral rib.
JP-A-11-255229

  In the prior art disclosed in Patent Document 1, the lower end of a square cylinder body with a rounded corner is closed at the bottom part provided continuously, and the upper end of the trunk part is tapered taper-shaped with a diameter reduced upward. Constructed by connecting the mouth part through the shoulder part. By providing a plurality of lateral ribs combined with the crush prevention rib part on the upper part of the trunk part, the upper part of the trunk part is prevented from being crushed. In a state where the rib portion exhibits flexibility, the rib portion has high strength, and a reinforcing panel capable of absorbing and deforming under reduced pressure is provided at the lower portion of the body portion to obtain a desired reduced pressure absorbing ability.

  However, in the above-described prior art, the upper part of the body portion not provided with the reduced pressure absorption panel does not exhibit sufficient reduced pressure absorption capability, and is thus demonstrated for the size of the bottle container. There is a problem that the reduced pressure absorption capacity is small, and the generated reduced pressure absorption deformation form is uneven and unpleasant.

  In addition, the lateral ribs have increased flexibility at the crush prevention ribs, and the increased flexibility can exert a certain amount of reduced pressure absorption capability at the upper part of the trunk, but the main part of the reduced pressure absorption deformation. Since there is no function to increase the vacuum absorption capacity in cooperation with the lower part of a certain body part, the flexibility exhibited by the crush prevention rib part cannot be effectively linked to the vacuum absorption function, and thus the entire bottle container There was a problem that the reduced pressure absorption ability exhibited as

  Therefore, the present invention was devised to solve the above-described problems in the prior art, and the configuration in which the weakened portion is provided on the peripheral rib (lateral rib) also increases the vacuum absorption capacity of the entire bottle container. Therefore, it is an object of the present invention to reliably prevent the occurrence of permanent deformation at the time of occurrence of decompression and to increase the decompression absorption capacity of the entire bottle container without difficulty.

Among the present invention for solving the above technical problems, the means of the invention according to claim 1 is:
Having a barrel (1) configured in a polygonal cylinder with a columnar wall (4) forming a rounded corner and a flat flat wall (2);
A circumferential groove-shaped peripheral rib (5) is provided around the body, and a weakened portion (6) having a shallow groove depth is formed in a portion located on the flat wall (2) of the peripheral rib (5) . Forming symmetrically ,
A flat rib (2) portion close to the weakened portion (6 ) is provided with a lateral groove-shaped reinforcing rib (7) facing the entire width range in which the left and right weakened portions (6 ) are formed .
Forming a reduced pressure absorption panel (3) on the desired flat wall (2) avoiding the peripheral rib (5);
It is in.

  In the first aspect of the present invention, the weakened portion provided in the peripheral rib portion located on the flat wall is formed by reducing the groove depth of the peripheral rib. In comparison with the above, the reinforcing force to the flat wall is small, and therefore the flat wall is deformed relatively flexibly by the applied external force (decompression force) at the portion where the weakened portion is located.

  The deformation due to the decompression force of the flat wall portion where the weakened portion is located becomes a depression deformation centered on the weakened portion, but the depression deformation of the flat wall portion exhibits a reduced pressure absorption action.

  In particular, in a flat wall provided with a reduced pressure absorption panel, the reduced pressure absorption panel is generally depressed and displaced due to the depression deformation centered on the weakened portion. It will be a thing.

Since the flat wall portion near the weakened portion of the peripheral rib is provided with reinforcing ribs that are opposed across the entire width range of the left and right weakened portions, this reinforcing rib is subject to depression deformation around the weakened portion. In this state, the deformation force of the depression deformation is prevented from acting on the other flat wall portion beyond the reinforcing rib, and the depression deformation around the weakened portion causes an unnatural depression deformation on the flat wall. To prevent.

  In particular, in the case of a flat wall provided with a vacuum absorbing panel, the reinforcing rib prevents the deformation force of the depression deformation centering on the weakened portion from acting on the vacuum absorbing panel. Ensure proper decompression absorption deformation operation.

  In other words, even if the vacuum absorption panel is depressed and displaced by the depression deformation of the flat wall part centering on the weakened part, it will not be deformed by merely displacing itself, thereby ensuring the original vacuum absorption deformation operation It can be done.

  The invention according to claim 2 is that, in the configuration of the invention according to claim 1, reinforcing ribs provided on the flat wall on which the reduced pressure absorption panel is formed are provided at the edge portion on the weakened portion side of the reduced pressure absorption panel. It is added.

  In the invention according to the second aspect, since the reinforcing rib is formed integrally with the vacuum absorbing panel, it is possible to reduce the complexity of the structure due to the combination of the reinforcing rib and the vacuum absorbing panel. There is no inconvenience that the size of the vacuum absorbing panel is limited by the reinforcing rib.

In the first aspect of the present invention, by providing the weakened portions in the respective flat walls symmetrically, it becomes easy to increase the lateral width of the depression deformation of the flat wall portion around the weakened portions. The depression deformation of the flat wall portion centering on the weakened portion does not become local, and the flexibility by providing the weakened portion is increased without difficulty.

  In addition, since the weakened portions are provided symmetrically, the generated deformation of the flat wall portion is caused to occur substantially evenly in the left and right directions. Inclination due to different depression displacement depth does not occur.

The invention described in claim 3 is the configuration of the invention described in claim 1 or 2 , in which peripheral ribs are provided above and below the body portion with the vacuum absorbing panel positioned therebetween.

In the invention described in claim 3 , since the flat wall portions adjacent to the upper and lower end edges of the reduced pressure absorption panel are both depressed and deformed, the reduced pressure absorption panel is substantially uniform without being inclined substantially vertically. Therefore, a large vacuum absorbing force is exhibited and the appearance of the bottle container in which each vacuum absorbing panel is displaced is not deteriorated.

Since the present invention has the above-described configuration, the following effects can be obtained.
In the first aspect of the invention, since the flexibility of the flat wall portion where the weakened portion of the peripheral rib is located can be increased, the flat wall portion is weakened when the decompression force is applied. It is possible to exert suitable flexibility while maintaining a state where the strength is increased by providing the peripheral ribs without causing permanent deformation and without causing permanent deformation in the direction.

  Depression deformation due to the decompression force of the flat wall portion where the weakened portion is located exhibits a reduced pressure absorption action, and particularly in the case of a flat wall provided with a decompression absorption panel, the decompression absorption panel is caused by the depression deformation centered on the weakened portion. As a result, the reduced pressure absorption action can be increased, and thus the increase in the vacuum absorption capacity can be easily achieved.

  The reinforcing rib regulates the depression deformation state centered on the weakened portion of the flat wall portion to prevent the occurrence of an undesirable depression deformation in the flat wall and the vacuum absorption panel. While not deteriorating the whole external appearance, it is possible to ensure an appropriate reduced pressure absorption deformation operation of the reduced pressure absorption panel and obtain a reliable and stable reduced pressure absorption action.

  In the invention according to claim 2, the combination structure of the reinforcing rib and the vacuum absorbing panel can be simplified, and accordingly, the manufacture of the bottle container is simplified, and the vacuum absorbing panel can be enlarged. Therefore, it is easy to increase the vacuum absorption capacity.

In the first aspect of the invention, it is easy to increase the lateral width of the depression deformation of the flat wall portion centered on the weakened portion, and thereby the depression deformation of the flat wall portion centered on the weakened portion is achieved. It is possible to increase the flexibility by providing a weakened portion without being local, and to obtain the deformation of the flat wall portion centering on the weakened portion quickly and stably. Can do.

  In addition, since the depression displacement posture of the vacuum absorption panel does not tilt left and right, there is no possibility that the vacuum absorption panel that has been depressed and displaced impairs the appearance of the bottle container.

In the invention described in claim 3 , since each vacuum absorption panel can be depressed and displaced uniformly, a large vacuum absorption force can be obtained, and the appearance of the bottle container in which each vacuum absorption panel is displaced and displaced The appearance does not deteriorate, and the reduced pressure absorption deformation does not reduce the commercial value.

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

  FIG. 1 is an overall front view of one embodiment of a bottle container according to the present invention as seen from the front of a single vacuum absorption panel 3, and the bottle container has a square-shaped barrel 1 with a square shape. A bottom portion 10 having a central portion depressed into a dome shape is continuously provided at the lower end, and a frustum cylinder shape in which a flat cross section gradually changes from a square with a square at the lower end to a circular shape at the upper end at the upper end of the body portion 1. A short cylindrical mouth tube portion 9 in which a thread, a bead ring, and a neck ring are provided in this order from the top is connected to the outer peripheral surface via a shoulder portion 8 that has been formed.

  The body portion 1 in the shape of a square tube with a rounded corner shape has four column walls 4 that form a rounded corner portion, the flat cross-sectional shape is curved in an arc shape and extends linearly in the vertical direction, and a flat plate shape. The four flat walls 2 are alternately arranged along the circumferential direction, and the decompression absorption panel 3 (see FIG. 4) is formed in the central portion of each flat wall 2 while being vertically long and bent and inverted. In addition, circumferential groove-shaped circumferential ribs 5 are respectively provided in the upper and lower end portions of the body portion 1 in the vicinity of the end edge portion of the reduced pressure absorption panel 3.

  The weakened part 6 (refer FIG. 3) which made shallow the groove depth of the circumferential rib 5 is formed in the substantially right-and-left both ends of the part located in each flat wall 2 of the circumferential rib 5, The circumferential rib 5 is this The weakening portion 6 weakens the reinforcing force on the flat wall 2, that is, increases flexibility.

  For this reason, when a decompression occurs in the bottle container, the flat wall 2 portion where the weakened portion 6 is located by the decompression is deformed and deformed relatively easily without causing permanent deformation. Since the deformation is a deformation centered on the weakened portion 6, the weakened portion 6 is located at both the left and right ends of the portion located on the flat wall 2 of the peripheral rib 5, so that the width range across the weakened portions 6 can be reduced. The entire portion of the flat wall 2 will be depressed and deformed.

  Since the depression deformation of the flat wall 2 portion where the peripheral rib 5 is located is performed at both upper and lower end portions of each flat wall 2, the decompression absorption panel 3 positioned between the upper and lower peripheral ribs 5 Along with the depression deformation of the two parts, the depression is displaced while maintaining its upright posture.

  Each decompression absorption panel 3 is provided with reinforcement ribs 7 at both upper and lower edges near the peripheral rib 5, and the deformation of the flat wall 2 is affected by the reinforcement ribs 7 on the decompression absorption panel 3. Thus, each vacuum absorption panel 3 performs the vacuum absorption deformation as designed, irrespective of the depression displacement.

  5 shows a bottle container A having a structure in which the weakened portion 6 of the peripheral rib 5 and the reinforcing rib 7 of the vacuum absorbing panel 3 are not provided in the structural example shown in FIG. 1, and the bottle container B according to the present invention shown in FIG. FIG. 2 shows a characteristic curve of the degree of decompression-absorption capacity, in which A shows a characteristic diagram of the bottle container A, and B shows a characteristic chart of the bottle container B according to the present invention.

  6 shows a table showing measurement data when the characteristic diagram shown in FIG. 5 is created. In the figure, A is the measurement data of the bottle container A, and B is the measurement data of the bottle container B. Is shown.

  As is clear from the characteristic diagram shown in FIG. 5 and the measurement data shown in FIG. 6, by implementing the present invention, the upper limit of the degree of vacuum is increased from 81 mmHg to 107 mmHg, and the upper limit of the absorption capacity. It can be seen that is increased from 46 ml to 60 ml.

  In addition, although the example which has the regular square cylinder-shaped trunk | drum 1 was shown as an example of illustration embodiment, the trunk | drum 1 of the bottle container of this invention is not limited to a regular square cylinder shape, A rectangular cylinder It is possible to make it polygonal cylinder shape, such as a shape and a hexagonal cylinder shape.

  In the illustrated embodiment, a configuration example in which the reduced pressure absorption panels 3 are provided on all the flat walls 2 is shown. However, the reduced pressure absorption panels 3 are necessarily provided on all the flat walls 2. Instead, if necessary, it may be provided on every other flat wall 2 along the circumferential direction, or may be provided only on a specific flat wall 2, for example, a rectangular cylindrical body 1 In this case, by providing the reduced pressure absorption panel 3 only on the flat wall 2 forming the longitudinal side, a large reduced pressure absorption capability can be obtained, and the reduced pressure absorption panel 3 portion can function suitably as a gripping portion. Can do.

1 is an overall front view showing an embodiment of the present invention. It is a top view of the embodiment shown in FIG. It is a trunk | drum flat sectional view in the surrounding rib of the example of embodiment shown in FIG. It is a trunk | drum flat sectional view in the reduced pressure absorption panel of the example of embodiment shown in FIG. It is a comparative characteristic line figure which shows the pressure reduction degree-absorption capacity characteristic of a bottle container. 6 is a data table showing measurement data for obtaining the characteristic diagram shown in FIG. 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1; Body part 2; Flat wall 3; Pressure-reduction absorption panel 4; Column wall 5; Peripheral rib 6; Weak part 7; Reinforcement rib 8; Shoulder part 9;

Claims (3)

Circumferential groove-shaped peripheral ribs (5) are wound around a cylindrical portion (1) formed of a columnar wall (4) forming a rounded corner and a flat flat wall (2). A weakened portion (6) having a shallow groove depth formed in a portion located on the flat wall (2) of the peripheral rib (5) symmetrically, and a flat wall close to the weakened portion (6) (2) A lateral groove-shaped reinforcing rib (7) facing the entire width range in which the left and right weakened portions (6 ) are formed is provided in the portion, and the desired flat wall (2) A synthetic resin bottle container in which a vacuum absorbing panel (3) is formed while avoiding the rib (5).   The reinforcement rib (7) provided in the flat wall (2) in which the reduced pressure absorption panel (3) is formed is provided at an end edge portion on the weakened portion (6) side of the reduced pressure absorption panel (3). Synthetic resin bottle container. The synthetic resin bottle container according to claim 1 or 2, wherein the peripheral rib (5) is provided above and below the trunk (1) with the vacuum absorbing panel (3) positioned therebetween.

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