JP4219771B2 - Synthetic resin bottle type container - Google Patents

Description

  The present invention relates to a synthetic resin bottle-type container including a vacuum absorption panel in a body portion of a container.

  Synthetic resin bottle-type containers are collectively referred to as so-called PET bottles made of polyethylene terephthalate (PET), and in recent years, small-sized containers of 500 ml (milliliter) or less have become widespread. Also, in the case of filling a high-temperature content in a PET bottle or the like, the inner pressure of the bottle is reduced, so-called a reduced pressure state, so that the barrel portion has a vacuum absorption capacity basically required as a heat-resistant bottle. A countermeasure is taken to prevent deformation of the bottle by providing a reduced pressure absorption panel.

  However, as the inner volume of the bottle becomes smaller, such as 350 ml (milliliter), 300 ml (milliliter), and 200 ml (milliliter), naturally, the surface area of the body portion also becomes smaller, so it is difficult to secure the area of the vacuum absorbing panel. It has become to. Such a decrease in the area occupied by the vacuum absorbing panel leads to a shortage of vacuum absorbing capacity, and in addition to a decrease in bottle rigidity, in the worst case, the appearance of the product is deteriorated due to deformation of the bottle, resulting in a loss of commercial value at the store. .

  On the other hand, in the so-called square bottle in which the body portion of the container is formed in a rectangular tube shape, two parts are formed on one side of the body portion so as to compensate for the shortage of the reduced pressure absorption capacity accompanying the decrease in the area occupied by the reduced pressure absorption panel. There has been proposed a structure in which a reduced-pressure absorption panel is vertically divided along a bottle central axis, and these reduced-pressure absorption panels are connected by at least one groove (for example, see Patent Document 1).

JP 2000-238736 A

  However, as a result of many years of research and development, the inventor of the present application has found that there is still room for improvement in securing the reduced pressure absorption capacity even in the conventional bottle with such measures.

  The present invention has been made in view of these facts, and provides a synthetic resin bottle-type container that can efficiently secure a reduced pressure absorption capacity even when the area of the reduced pressure absorption panel cannot be increased. Objective.

According to a first aspect of the present invention, there is provided a synthetic resin bottle-type container provided with a vacuum absorption panel dropped into the barrel inside the barrel of the container, and a top projecting outward from the barrel at the center of the vacuum absorption panel. Rutotomoni includes a protrusion having a surface, and a rib was divided along the protrusion waistline connect the mutual these protrusions,
Is characterized in Rukoto includes a groove extending along the bottle central axis from the rib top surface of the projecting portion.

The invention according to claim 2 is a synthetic resin bottle-type container comprising a vacuum absorption panel dropped into the body part of the body part of the container,
A protrusion having a top surface protruding outward from the body portion at the center of the vacuum absorbing panel, and a rib that divides the protrusion along the periphery of the body and connects the protrusions to each other;
A stepped shape is formed along the circumference of the container from the end of the reduced pressure absorption panel to the rising portion of the protrusion .

According to a third aspect of the present invention, in the second aspect of the present invention, the top surface of the projecting portion includes a concave groove extending from the rib along the central axis of the bottle .

The invention according to claim 4, in any one of claims 1 to 3, comprising the rib is projected in the barrel outwardly with respect to the top surface of the projecting portion.

According to a fifth aspect of the present invention, in any one of the first to third aspects, the rib is dropped into the trunk portion with respect to the top surface of the protruding portion .

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, an end portion of the rib portion along the periphery of the rib is projected from a rising portion of the protrusion portion along the periphery of the protrusion. .

The invention according to a seventh aspect is the invention according to any one of the first to sixth aspects, wherein the vacuum absorbing panel is dropped vertically into the inside of the body part toward a plane including the bottle central axis and the bottle radial direction axis. A side wall connecting the end of the vacuum absorbing panel and the body is provided .

In the invention according to claims 1 to 3 , a protrusion having a top surface protruding outside the body part at the center of the reduced pressure absorption panel, and the protrusions are divided along the circumference of the body to connect the protrusions to each other. Since it has ribs, the vacuum absorption panel moves better, and the vacuum absorption capacity increases by the movable body integral of the protrusions and ribs, so even if the area of the vacuum absorption panel cannot be increased, the degree of vacuum reduction can be suppressed. In addition, the vacuum absorption capacity necessary for preventing the deformation of the bottle-type container can be efficiently ensured. Therefore, according to the invention according to claims 1 to 3 , it is possible to provide a small bottle-shaped container that is excellent in heat resistance and hardly deforms.

In the invention according to claim 4 , since the rib protrudes outward from the body portion with respect to the top surface of the protruding portion, a force for pulling the rib downward during decompression works, so Even when the area of the vacuum absorption panel cannot be increased, the pressure reduction capacity can be further reduced and the vacuum absorption capacity necessary to prevent the deformation of the bottle-type container can be secured more efficiently. can do. Therefore, according to the invention which concerns on Claim 4 , the small bottle type container which was further excellent in heat resistance, and is hard to deform | transform can be provided.

In the invention according to claim 5 , since the rib is dropped into the body portion with respect to the top surface of the protrusion, the vacuum absorption capacity is increased and reinforced by the movable body integral of the protrusion and the rib. Even if the area of the vacuum absorption panel can not be increased, the degree of vacuum can be further reduced and the vacuum absorption capacity necessary to prevent the deformation of the bottle-type container is more efficient. Can be secured. Therefore, according to the fifth aspect of the present invention, it is possible to provide a small bottle-type container that is excellent in heat resistance while maintaining rigidity and is difficult to be deformed.

In the invention according to claim 6 , since the end portion along the periphery of the body portion of the rib protrudes from the rising portion along the periphery of the body portion of the protruding portion, the movement of the vacuum absorbing panel is further improved. The vacuum absorption capacity increases by the movable volume integral of this overhang, so even if the area of the vacuum absorption panel cannot be increased, the degree of vacuum can be further reduced and the vacuum required to prevent deformation of the bottle-type container Absorption capacity can also be ensured more efficiently. Therefore, according to the invention which concerns on Claim 6 , the small bottle type container which was further excellent in heat resistance, and is hard to deform | transform can be provided.

Since the invention which concerns on Claim 1 and 3 is provided with the ditch | groove extended along the bottle center axis line from the said rib in the top surface of the said protrusion part, the motion of a pressure-reduction absorption panel becomes further better, and this ditch | Since the vacuum absorption capacity increases by the volume, even if the vacuum absorption panel area cannot be increased, the vacuum level can be further reduced and the vacuum absorption capacity necessary to prevent deformation of the bottle-type container is further efficient. Can be secured. Therefore, according to the first and third aspects of the invention, it is possible to provide a small bottle-shaped container that is further excellent in heat resistance and hardly deformed.

The invention which concerns on Claim 7 falls the said decompression absorption panel perpendicularly inside the said trunk | drum toward the plane containing a bottle center axis line and a bottle radial direction axis, and the edge part of the said decompression absorption panel, the said trunk | drum, Because the side wall connecting the two parts is provided, the movement of the vacuum absorption panel is further improved, and the vacuum absorption capacity is increased by the movable body integral of this side wall, so even if the area of the vacuum absorption panel cannot be increased, the degree of vacuum reduction can be further increased. While being able to suppress, the vacuum absorption capacity | capacitance required in order to prevent a deformation | transformation of a bottle type container can be ensured still more efficiently. Therefore, according to the invention which concerns on Claim 7 , the small bottle type container which was further excellent in heat resistance, and is hard to deform | transform can be provided.

Since the invention according to claim 2 has a stepped shape from the end of the reduced pressure absorption panel to the rising portion of the protrusion along the circumference of the container, the movement of the reduced pressure absorption panel is further improved. Since the reduced pressure absorption capacity is increased by the movable volume integral of this stepped shape portion, even when the area of the reduced pressure absorption panel cannot be increased, the degree of reduced pressure can be further suppressed and the deformation of the bottle-type container can be prevented. The required reduced pressure absorption capacity can be ensured more efficiently. Therefore, according to the invention which concerns on Claim 2 , the small bottle type container which was excellent in heat resistance, and is hard to deform | transform can be provided.

  FIG. 1 is a front view showing an example of a synthetic resin bottle-type container of the present invention in the form of a so-called 350 ml PET bottle 100 made of polyethylene terephthalate (PET) having an inner volume of 350 ml (milliliter). (A), (b) is the top view which shows the PET bottle 100 of FIG. 1 from the arrow D1, and the bottom view which shows from the arrow D2, respectively.

  As shown in FIGS. 1 and 2, the PET bottle 100 is a so-called round bottle in which the mouth part 110 is connected to the body part 130 via the shoulder part 120 along the bottle central axis O1, and the body part 130 has a cylindrical shape. The shoulder 120 and the trunk 130 are connected to each other via an annular groove 150 dropped into the trunk 130 along the circumference of the trunk. In addition, the trunk portion 130 is connected to a bottom portion 140 that is a ground contact surface via an annular groove portion 160 that is dropped into the trunk portion 130 along the circumference of the trunk portion. Further, as shown in FIG. 1, the body portion 130 is connected to the first body portion 131 having the outermost diameter of the body portion 130 and the first body portion 131, and is dropped from the first body portion 131 into the body portion 130. The second body portion 132 is inserted.

  Since the PET bottle 100 of this embodiment is used as a heat-resistant bottle that can be filled with high-temperature contents, as shown in FIG. 2B, a plurality of (six in this embodiment) are provided along the periphery of the trunk portion 130. The vacuum absorption panel 170 is provided.

  3A to 3C are an enlarged view of a main part showing the reduced pressure absorption panel 170 of FIG. 1, an AA sectional view and a BB sectional view of FIG. 1, respectively.

  As shown in FIG. 3, the reduced pressure absorption panel 170 has an edge 171 that is inclined downward from the end portion 170 e to the inside of the body portion 130, and is connected to the edge 171 toward the central portion of the reduced pressure absorption panel 170. An annular bottom surface 171a is formed between the edge 170e of the reduced pressure absorption panel 170 and the rising portion 172e of the protrusion 172. The protrusion 172 protrudes outside the portion 130.

  As shown in FIGS. 3B and 3C, the protrusion 172 has a trapezoidal shape having a flat top surface 173 at the center of the reduced pressure absorption panel 170. Further, as shown in FIG. 3A, the projecting portion 172 divides the projecting portion 172 along the circumference of the trunk at a position that bisects the projecting portion 172 with respect to the bottle radial axis O2. Ribs 174 are provided to connect each other. As shown in FIG. 3C, the upper portion of the rib 174 forms a concave portion that falls into the body portion 130 along a certain radius of curvature r1 toward the central portion of the vacuum absorbing panel 170. While the radial height of 174 a coincides with the top surface 173 of the protrusion 172, the portion 174 b other than the bottom surface 174 a protrudes outside the trunk 130 with respect to the top surface 173 of the protrusion 172. Further, as shown in FIGS. 3A and 3C, the rib 174 has an end 174e extending along the periphery of the rib projecting from a rising portion 173e along the periphery of the protruding portion 172, and is in the middle of the bottom surface 171a. It extends to.

  In this embodiment, a protrusion 172 having a top surface 173 that protrudes outside the body part 130 at the center of the reduced pressure absorption panel 170 and the protrusion 172 are divided along the periphery of the body so as to connect the protrusions 172 to each other. Since the rib 174 is provided, the movement of the vacuum absorbing panel 170 is improved, and the vacuum absorbing capacity is increased by the movable body integral of the protrusion 172 and the rib 174. Therefore, even if the area of the vacuum absorbing panel 170 cannot be increased, The degree of vacuum absorption required to prevent the deformation of the PET bottle 100 can be efficiently ensured. Therefore, according to such a configuration, it is possible to provide a small PET bottle that has excellent heat resistance and is difficult to deform.

  In particular, in this embodiment, since a part 174b of the rib 174 is protruded to the outside of the body part 130 with respect to the top surface 173 of the protrusion 172, a force for pulling the rib 174 downward at the time of decompression works. Even when the force that pushes the protruding portion 172 in the lateral direction works and the area of the vacuum absorption panel 170 cannot be increased, the vacuum reduction capacity necessary for further suppressing the degree of vacuum and preventing the PET bottle 100 from being deformed. Can be secured even more efficiently. The upper portion of the rib 174 may be a flat surface instead of the concave shape having the bottom surface 174a.

  Further, in this embodiment, the end portion 174e along the periphery of the rib 174 is protruded from the rising portion 172e along the periphery of the protrusion 172, so that the movement of the vacuum absorbing panel 170 is further improved. Since the reduced pressure absorption capacity is increased by the movable volume of the overhang, even when the area of the reduced pressure absorption panel 170 cannot be increased, the reduced pressure can be further reduced and the reduced pressure necessary for preventing the deformation of the PET bottle 100. Absorption capacity can also be ensured more efficiently. Therefore, according to such a configuration, it is possible to provide a small PET bottle that is further excellent in heat resistance and hardly deforms.

  By the way, as shown in FIG. 2B, FIG. 3B, and FIG. 3C, the reduced pressure absorption panel 170 of the present embodiment is a plane including the bottle central axis O1 and the bottle radial direction axis O2. A side wall 180 that falls vertically into the body 130 toward the longitudinal section F including the bottle center axis O1 and connects the end 170e of the reduced pressure absorption panel 170 and the first and second bodies 131, 132 is provided. Prepare. For this reason, the side wall 180 of this embodiment is positioned at right angles to the first and second body portions 131 and 132. Also in this case, the movement of the vacuum absorption panel 170 is further improved, and the vacuum absorption capacity is increased by the movable body integral of the side wall 180. Therefore, even when the area of the vacuum absorption panel 170 cannot be increased, the degree of vacuum reduction is further suppressed. In addition, the vacuum absorption capacity necessary for preventing the deformation of the PET bottle 100 can be more efficiently ensured. Therefore, even with such a configuration, it is possible to provide a small PET bottle that is further excellent in heat resistance and hardly deformed.

  In this embodiment, as shown in FIGS. 3A and 3C, the bottle extends along the bottle central axis O1 from the side wall 180 to the rising portion 172e of the protruding portion 172 along the circumference of the PET bottle 100. A stepped portion 175 is formed, and a step from the side wall 180 to the rising portion 172e of the protruding portion 172 is stepped. Also in this case, the movement of the reduced pressure absorption panel 170 is further improved, and the reduced pressure absorption capacity is increased by the movable body integral of the stepped shape portion composed of the stepped portion 175. Therefore, even when the area of the reduced pressure absorption panel 170 cannot be increased. In addition, the degree of vacuum can be further suppressed, and the vacuum absorption capacity necessary to prevent the deformation of the PET bottle 100 can be more efficiently ensured. Therefore, even with such a configuration, it is possible to provide a small PET bottle that is further excellent in heat resistance and hardly deformed. In this embodiment, the step portion 175 is one step, but there may be a plurality of steps, and the shape is not limited to a step due to a flat surface, but may be a step due to a curved surface.

  There are various modifications to the first embodiment shown in FIG. Hereinafter, the PET bottles 200 and 300 according to the second and third embodiments of the present invention will be described with reference to FIGS. In the following description, the front view of the PET bottles 200 and 300 is referred to FIG. 1, and the same parts as those in FIGS.

  FIG. 4 is a cross-sectional view showing a second embodiment of the PET bottle 200 according to the present invention in a BB cross section in FIG. In the first form of FIG. 1, as shown in FIG. 3 (c), the radial height of the top 174b of the rib 174 exceeds the plane F2 including the point where the body 130 and the side wall 180 are connected. In the form, as shown in FIG. 4, the radial heights of the top surface 173 of the projecting portion 172 and the top portion 174 b of the rib 174 do not exceed the plane F 2 including the point where the body portion 130 and the side wall 180 are connected.

  5 (a) and 5 (b) are cross-sectional views showing a third embodiment of the PET bottle 300 according to the present invention in the AA cross section and the BB cross section in FIG. 1, respectively. In this embodiment, as shown in FIG. 5A, the top surface 173 of the projecting portion 172 divided into two is inclined to the outside of the body portion 130 by the amount of change α toward the rib 174, while the projecting portion The radial heights of the top surface 173 of 172 and the top portion 174b of the rib 174 both exceed the plane F2 including the point where the body portion 130 and the side wall 180 are connected.

  That is, in the case where the rib 174 is protruded outside the body 130 with respect to the top surface 173 of the protrusion 172, the radial heights of the top surface 173 of the protrusion 172 and the top 174b of the rib 174 are the second body. Various changes can be made as long as the height does not exceed the radial height (imaginary line L) of the portion 132.

  Next, with reference to FIG. 6, the PET bottle 400 which is the 4th form of this invention is demonstrated. Also in the following description, the front view of the PET bottle 400 refers to FIG. 1, and the same parts as those in FIGS.

  FIGS. 6A to 6C are respectively an enlarged view of a main part showing a reduced pressure absorption panel 470 of the PET bottle 400, an AA sectional view and a BB sectional view in FIG.

  As shown in FIG. 6, the reduced pressure absorption panel 470 has an end edge 471 that is inclined inward from the end portion 470 e to the inside of the body portion 130, and is connected to the end edge 471 toward the central portion of the reduced pressure absorption panel 470. The annular bottom surface 471 a is formed between the end edge 470 e of the reduced pressure absorption panel 470 and the rising portion 472 e of the projection 472.

  As shown in FIGS. 6 (b) and 6 (c), the protruding portion 472 extends outward from the body portion 130 along a certain radius of curvature r2 toward the central portion of the vacuum absorbing panel 470 toward the central portion of the vacuum absorbing panel 470. A dome shape having a projecting top surface 473 is formed. Further, as shown in FIG. 6A, the projecting portion 472 divides the projecting portion 472 along the circumference of the trunk at a position that bisects the projecting portion 472 with respect to the bottle radial direction axis O 2. Ribs 474 are provided to connect each other. As shown in FIG. 6 (c), the upper portion of the rib 474 forms a recess that falls into the inside of the trunk portion 130 along a certain radius of curvature r3 toward the central portion of the vacuum absorbing panel 470. The radial heights of 474a and the top portion 474b are lower than the top surface 473 of the protruding portion 472, and are dropped into the trunk portion 130 with respect to the top surface 473 of the protruding portion 472. Further, as shown in FIGS. 6A and 6C, the rib 474 is formed by projecting an end portion 474e along the periphery of the trunk portion from the rising portion 473e along the periphery of the projection portion 472, and the bottom surface 471a. It extends to the middle.

  Also in this embodiment, a protrusion 472 having a top surface 473 that protrudes outside the body 130 at the center of the reduced pressure absorption panel 470, and the protrusion 472 are divided along the periphery of the body to connect the protrusions 472 to each other. Since the rib 474 is provided, the movement of the vacuum absorbing panel 470 is improved, and the vacuum absorbing capacity is increased by the movable body integral of the protrusion 472 and the rib 474. In addition, the degree of vacuum absorption capacity necessary for preventing deformation of the PET bottle 400 can be efficiently secured. Therefore, according to such a configuration, it is possible to provide a small PET bottle that has excellent heat resistance and is difficult to deform.

  In particular, in this embodiment, the rib 474 is dropped inside the body portion 130 with respect to the top surface 473 of the protrusion 472, so that the decompression absorption capacity is increased by the movable body integral of the protrusion 472 and the rib 474 and the reinforcing rib. Even when the area of the vacuum absorption panel 470 cannot be increased, the degree of vacuum can be further suppressed and the vacuum absorption capacity necessary for preventing the deformation of the PET bottle 400 is further efficient. Can be secured. Therefore, according to such a configuration, it is possible to provide a small-sized PET bottle that is excellent in heat resistance and is difficult to be deformed while maintaining rigidity. The upper portion of the rib 474 may be a flat surface instead of the concave shape having the bottom surface 474a. Also in this embodiment, since the end portion 474e along the periphery of the body portion of the rib 474 protrudes from the rising portion 472e along the periphery of the protrusion portion 472, similarly to the rib 174 of the first embodiment, A small PET bottle that has excellent heat resistance and is difficult to deform can be provided.

  Further, the vacuum absorbing panel 470 of this embodiment also drops the vacuum absorbing panel 470 vertically toward the longitudinal section F toward the inside of the body portion 130 as shown in FIGS. The side wall 180 connecting the end portion 470e and the first and second body portions 131 and 132 is provided. Also in this case, as in the first embodiment, the movement of the reduced pressure absorption panel 470 is further improved, and the reduced pressure absorption capacity is increased by the movable volume integral of the side wall 180. Bottles can be provided.

  Also in this embodiment, as shown in FIGS. 6A and 6C, the bottle extends along the bottle central axis O1 from the side wall 180 to the rising portion 472e of the protruding portion 472 along the circumference of the PET bottle 400. A stepped portion 475 is formed, and a stepped shape is formed from the side wall 180 to the rising portion 472e of the protruding portion 472. Also in this case, as in the first embodiment, the movement of the reduced pressure absorption panel 470 is further improved, and the reduced pressure absorption capacity is increased by the movable volume integral of the stepped shape portion composed of the stepped portion 475, so that the heat resistance is further improved. It is possible to provide a small PET bottle that is difficult to deform.

  There are also various modifications in the fourth embodiment shown in FIG. Hereinafter, with reference to FIG. 7, the PET bottle 500 which is the 5th form of this invention is demonstrated. In the following description, the same parts as those shown in FIGS. 1 to 3 and FIG.

  FIG. 7 is a front view of the PET bottle 500. 8A to 8C are an enlarged view of a main part showing the reduced pressure absorption panel 570 of the PET bottle 500, an AA sectional view and a BB sectional view in FIG. In the fifth embodiment, as shown in FIG. 8, the top surface 473 of the protrusion 472 is provided with a concave groove 571 extending from the rib 474 along the bottle central axis O1. As shown in FIGS. 8B and 8C, the concave groove 571 is connected to the rib 474 in the open region X where the rib 474 exists, and has a tapered shape along the bottle center axis O1.

  In this embodiment, since the top surface 473 of the projecting portion 472 is provided with the concave groove 571 extending from the rib 474 along the bottle center axis O1, the movement of the vacuum absorbing panel 570 is further improved, and the movable volume of the concave groove 571 is increased. Therefore, even if the area of the reduced pressure absorption panel 570 cannot be increased, the degree of reduced pressure can be further suppressed, and the reduced pressure absorption capacity necessary for preventing the deformation of the PET bottle 500 is further increased. Can be secured. Therefore, even with such a configuration, it is possible to provide a small PET bottle that is further excellent in heat resistance and hardly deformed. In addition, the groove depth of the concave groove 571 coincides with the bottom surface 474a of the rib 474 in the open region X and is connected to the rib 474. However, the groove depth of the concave groove 571 is larger than that of the bottom surface 474a of the rib 474. Deep or shallow.

  Further, FIG. 9 is a front view of a PET bottle 600 showing a sixth embodiment of the present invention, and FIGS. 10A to 10C are enlarged views showing main parts of the reduced pressure absorption panel 670 of the PET bottle 600, respectively. It is AA sectional drawing and BB sectional drawing in FIG. In the following description, the same parts as those in FIGS.

  In the PET bottle 600, as shown in FIG. 10, the reduced-pressure absorption panel 670 includes an end 671 that inclines from the end 670e to the inside of the body 130, and the center of the reduced-pressure absorption panel 670 connected to the end 671. It consists of a protruding portion 672 that protrudes outward from the body portion 130 toward the portion, and an annular bottom surface 671a is formed between the edge 670e of the reduced pressure absorption panel 670 and the rising portion 672e of the protruding portion 672.

  As shown in FIGS. 9B and 9C, the protruding portion 672 has a convex top surface 673 that protrudes to the outside of the trunk portion 130 along the radius of curvature r4 toward the central portion of the vacuum absorbing panel 670. It has a dome shape. Further, as shown in FIG. 10 (a), the protruding portion 672 is also divided into two along the waist around the protruding portion 672 so that the protruding portion 672 is divided into two equal parts with respect to the bottle radial axis O2. Ribs 674 are provided to connect each other. As shown in FIG. 9C, the upper portion of the rib 674 constitutes a convex portion that protrudes to the outside of the trunk portion 130 along a certain radius of curvature r5 toward the central portion of the vacuum absorbing panel 670, and the top portion thereof. While the radial height of 674a coincides with the top surface 673 of the protruding portion 672, the portion other than the top portion 674a is dropped into the body 130 with respect to the top surface 673 of the protruding portion 672. In addition, as shown in FIGS. 10A and 10C, the rib 674 has an end portion 674e along the periphery of the trunk portion that coincides with a rising portion 672e along the periphery of the projection portion 672.

  Also in this embodiment, a protruding portion 672 having a top surface 673 protruding outside the trunk portion 130 at the center of the reduced pressure absorption panel 670 and the protruding portion 672 are divided along the circumference of the trunk to connect the protruding portions 672 to each other. Since the rib 674 is provided, the movement of the vacuum absorbing panel 670 is improved, and the vacuum absorbing capacity is increased by the movable body integral of the protrusion 672 and the rib 674. Therefore, even when the area of the vacuum absorbing panel 670 cannot be increased, The degree of vacuum absorption required to prevent deformation of the PET bottle 600 can be efficiently ensured. Therefore, according to such a configuration, it is possible to provide a small PET bottle that has excellent heat resistance and is difficult to deform.

  Particularly, in this embodiment, the end 674e along the periphery of the rib 674 has a shape corresponding to the rising portion 672e along the periphery of the protrusion 672.

  Also in this embodiment, since the rib 674 is dropped inside the body portion 130 with respect to the top surface 673 of the protrusion 672, the protrusion 672 and the rib 674 can be moved while maintaining rigidity, as in the fourth embodiment. The reduced-pressure absorption capacity can be increased by the volume, and even when the area of the reduced-pressure absorption panel 470 cannot be increased, the reduced-pressure absorption capacity can be further suppressed and the deformation of the PET bottle 400 can be prevented. Can be more effectively secured. Furthermore, as shown in FIGS. 10B and 10C, the reduced pressure absorption panel 670 of the present embodiment also drops the reduced pressure absorption panel 670 vertically toward the inside of the body portion 130 toward the longitudinal section F. Since the side wall 180 that connects between the end 670e and the first body 131, 132 is provided, the movement of the vacuum absorbing panel 670 is further improved as in the first embodiment. PET bottles can be provided.

  Also in this embodiment, as shown in FIGS. 10A and 10C, the bottle extends along the bottle central axis O1 from the side wall 180 to the rising portion 672e of the protruding portion 672 along the circumference of the PET bottle 600. Since the stepped portion 675 is formed and the step from the side wall 180 to the rising portion 672e of the protruding portion 672 is stepped, the movement of the vacuum absorbing panel 670 is further improved as in the first embodiment. A small PET bottle that has excellent heat resistance and is difficult to deform can be provided.

  6-11, the rib provided on the top surface of the projecting portion is dropped into the inside of the trunk portion with respect to the top surface of the projecting portion, and the top surface of the projecting portion and the top portion of the rib are also provided. The height in the radial direction can be variously changed as long as it does not exceed the radial height (imaginary line L) of the second body portion 132.

  Next, in order to clarify the difference between the synthetic resin bottle container of the present invention and the conventional synthetic resin bottle container, a conventional PET bottle 700 is illustrated in FIGS. However, FIG. 11 is a front view of a conventional PET bottle 700, and FIGS. 12 (a) to 12 (c) are enlarged views of main parts showing a conventional vacuum absorbing panel 770, respectively, and AA in FIG. It is sectional drawing and BB sectional drawing.

  The PET bottle 700 is a so-called 350 ml round bottle having a cylindrical body portion 730 connected to the mouth portion 710 and the shoulder portion 720. Of the first and second body portions 731 and 732, the second body portion 732 includes: A plurality of vacuum absorbing panels 770 are provided along the periphery of the trunk. The decompression absorption panel 770 includes an end edge 771 that slopes down from the end part 770e connected to the second body part 732 into the inside of the body part 730, and a center of the bottle at the center part of the decompression absorption panel 770 connected to the end edge 771. The panel surface 772 has a recess 770n extending along the axis O1.

The 350 ml PET bottle 10 according to the present invention in FIG. 1 is shown in Example 1, the 350 ml PET bottle 10 in FIG. 4 according to the present invention in Example 2, the 350 ml PET bottle 10 in FIG. 5 according to the present invention in Example 3 and FIG. 350 ml PET bottle 10 according to the present invention in Example 4, 350 ml PET bottle 10 according to the present invention in FIG. 7 as Example 5, 350 ml PET bottle 10 according to the present invention in FIG. 9 as Example 6, and conventional 350 ml PET bottle 700 in FIG. Is a comparative example 1, and the experimental data table comparing the degree of reduced pressure and the reduced pressure absorption capacity of each of Examples 1 to 6 and Comparative Example 1 is shown below. “Decompression degree” mmHg (millimeter of mercury) and “absorption capacity” ml (milliliter) shown in the following experimental data table indicate the results of measurement by the following test methods.
<Test method>
(1) Fill the measuring bottle with water. In addition, the bottle to be used should use what passed 24 hours or more after production.
(2) Attach a burette with a rubber stopper to the mouth and read the burette liquid surface position.
(3) Operate the vacuum pump and depressurize with a digital manometer (or mercury manometer) at a speed of 3 mmHg / sec.
(4) When the bottle is deformed, read the value of the digital manometer and the burette liquid level position.
(5) The value difference between the burettes before and after the test is taken as the absorption capacity.
Note that 1 mmHg corresponds to approximately 133 kPa (kilopascal).

  Referring to Table 1, in Examples 1 to 6, the degree of decompression is lower than that in Comparative Example 1, while the absorption capacity is increased. That is, according to the PET bottles 100 to 600 according to the present invention, it is apparent that the performance as a heat resistant bottle is improved as compared with the conventional one.

  The above description shows only one embodiment of the present invention, and various modifications can be made within the scope of the claims by those skilled in the art. For example, the number of vacuum absorption panels is at least one. The top surface of the protruding portion is not limited to a flat surface, and may be a curved surface. The bottle is not limited to a round bottle, but may be a so-called square bottle in which the body of the container is formed in a square tube shape. The synthetic resin for molding the bottle is not limited to PET resin, but polyethylene naphthalate resin. Or a synthetic resin such as amorphous polyester. In addition, the layer structure is not limited to the single layer structure of the above resin, and a layer structure or regeneration in which a barrier resin such as EVOH, polyamide (especially xylylene group-containing polyamide) or cyclic polyolefin is blended or positioned in the middle of one or more layers. Layer structure in which the material layer is located in the middle, and oxygen absorbing resin (for example, an inorganic acid containing a transition metal catalyst (for example, Co, Fe, Mn, Ni, Ti) in a matrix of aliphatic nylon and aromatic nylon) It is also possible to adopt a layer structure in which one or more layers of oxygen absorbing resin or the like generally used in the form of a salt or a complex salt of an organic acid salt are located in the middle. Furthermore, the constituent elements of the first to sixth embodiments described above can be combined in various ways.

It is a front view which shows the PET bottle which is the 1st form of this invention. (A), (b) is the top view and bottom view which respectively show the PET bottle of the same form. (A)-(c) is the principal part enlarged view which shows the decompression absorption panel of the same form, respectively, AA sectional drawing of FIG. 1, and BB sectional drawing. It is BB sectional drawing which shows the PET bottle which is the 2nd form of this invention. (A), (b) is AA sectional drawing and BB cross section which respectively show the PET bottle of the 3rd form of this invention. (A)-(c) is the principal part enlarged view, AA sectional drawing, and BB sectional drawing which respectively show the pressure-reduction absorption panel of the PET bottle of the 4th form of this invention. It is a front view of the PET bottle of the 5th form of this invention. (A)-(c) is the principal part enlarged view which shows the decompression absorption panel of the same form, respectively, AA sectional drawing in FIG. 7, and BB sectional drawing. It is a front view of the PET bottle of the 6th form of this invention. (A)-(c) is the principal part enlarged view which shows the decompression | absorption panel of the same form, respectively, AA sectional drawing in FIG. 9, and BB sectional drawing. It is a front view which illustrates the conventional PET bottle. (A)-(c) is the principal part enlarged view which shows the decompression absorption panel of the example, respectively, AA sectional drawing of FIG. 11, and BB sectional drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 PET bottle 110 mouth part 120 shoulder part 130 trunk | drum 131 1st trunk | drum 132 2nd trunk | drum 140 bottom 150,160 annular groove part 170 decompression absorption panel 170e decompression absorption panel edge 171 decompression absorption panel edge 171a decompression absorption panel Bottom surface 172 Depressurization absorbing panel projection 172e Projection rising portion 173 Projection top surface 174 Rib 175 Stepped portion 180 Side wall
571 concave groove F plane including bottle central axis and bottle radial axis O1 bottle central axis O2 bottle radial axis

Claims (7)

In a synthetic resin bottle-type container provided with a reduced pressure absorption panel dropped into the body part of the container body,
Rutotomoni includes a protrusion having a top surface which projects into the body portion outside the central portion of the vacuum panels, and ribs divided along the protrusion waistline connect the mutual these protrusions,
Synthetic resin bottle type container, characterized in Rukoto includes a groove extending along the bottle central axis from the rib top surface of the projecting portion. In a synthetic resin bottle-type container provided with a reduced pressure absorption panel dropped into the body part of the container body,
A protrusion having a top surface protruding outward from the body portion at the center of the vacuum absorbing panel, and a rib that divides the protrusion along the periphery of the body and connects the protrusions to each other;
A synthetic resin bottle-type container having a stepped shape from the end of the reduced pressure absorption panel to the rising portion of the protrusion along the circumference of the container. The synthetic resin bottle-type container according to claim 2 , further comprising a concave groove extending along the bottle central axis from the rib on the top surface of the protrusion . The synthetic resin bottle-type container according to any one of claims 1 to 3, wherein the rib is protruded outward of the body portion with respect to a top surface of the protrusion . The synthetic resin bottle-type container according to any one of claims 1 to 3 , wherein the rib is dropped into the body portion with respect to a top surface of the protruding portion . The synthetic resin bottle-shaped container according to any one of claims 1 to 5, wherein an end portion of the rib along the periphery of the rib projects from a rising portion of the protrusion portion along the periphery of the protrusion . A side wall that drops the vacuum absorption panel vertically toward the inside of the body part toward a plane including a bottle center axis and a bottle radial direction axis and connects the end part of the vacuum absorption panel and the body part. Item 7. A synthetic resin bottle-type container according to any one of Items 1 to 6.

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