JP2017039514A - Container made of synthetic resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container made of synthetic resin comprising a pressure reduction absorbing panel capable of achieving sufficient pressure reduction absorbing performance without causing any appearance defect, while the respective pressure reduction absorbing panels disposed in the container body part equally deform.SOLUTION: In a panel shape, a panel body 61 of pressure reduction absorbing panels 6 is partitioned across a valley line part 62 height-wise extending in the center part of a circumferential direction, into two panel dividing parts 63, each of which is raised toward outside of a container so that top parts 64 are height-wise formed, and in each of which, a plurality of crossing groove parts 65 are height-wise aligned crossing the top parts 64.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a synthetic resin container including a reduced pressure absorption panel that absorbs a pressure change in a container after filling and sealing the contents.

  Conventionally, a synthetic resin container formed by forming a bottomed cylindrical preform using a thermoplastic resin such as polyethylene terephthalate, and then molding the preform into a bottle shape by biaxial stretch blow molding or the like, It is generally used in a wide field as a container containing various beverages.

In addition, when filling a synthetic resin container of this type with a content, a so-called hot pack is also known in which a heat-sterilized content is filled and sealed at a high temperature.
After filling and sealing the contents with a hot pack, the container cooled to room temperature is in a reduced pressure state. Therefore, in the case of a container provided for a hot pack, it generally deforms inside the container with cooling. A plurality of reduced pressure absorption panels that reduce the volume of the container and absorb the decrease in internal pressure are disposed along the circumferential direction in the container body.

  On the other hand, when hot-packing the contents, the inside of the container becomes a positive pressure due to the weight and heat of the contents, and further, the pressure accompanying filling (filling fine pressure), and tries to deform the container so that the container expands outward. The load acts on the vacuum absorbing panel. And when hot-packing the contents, if the vacuum absorption panel is fixed in a shape that swells outward from the container, not only can the pressure decrease in the container due to cooling not be sufficiently absorbed, There is a problem that the appearance is poor.

  Thus, while taking into account that the reduced pressure absorption panel is deformed inward of the container in order to absorb the decrease in internal pressure due to cooling, it is also considered to be deformed so as to swell outward when the contents are filled. Thus, there is a demand for a panel shape that allows these reversible deformations, and the present applicant has proposed such a panel shape in Patent Document 1.

Japanese Patent No. 4217890

  However, in this type of synthetic resin container, attempts have been made to make the container as thin as possible in order to reduce its weight and reduce the cost by reducing the amount of resin used. In recent years, the demand for such thinning has become increasingly severe. As the container becomes thinner, it becomes more difficult to uniformly deform each of the plurality of reduced pressure absorption panels arranged in the container body. For example, after hot packing, a part of the reduced pressure absorption panel is placed in the container. Although some of the other vacuum absorption panels are deformed in the direction, they cannot be inverted inside the container while being bulged outwardly, and the tendency to be poor in appearance is seen more strongly. It has become to.

  The present invention has been made in view of the above-described circumstances, and in recent years, a plurality of reduced-pressure absorptions disposed in a container body have been increasingly demanded to reduce the weight and thickness of containers. It is an object of the present invention to provide a synthetic resin container provided with a reduced pressure absorption panel capable of exhibiting sufficient reduced pressure absorption performance without causing an appearance defect due to uniform deformation of each of the panels.

  A synthetic resin container according to the present invention is a synthetic resin container that includes a mouth portion, a shoulder portion, a trunk portion, and a bottom portion, and has a plurality of reduced pressure absorption panels arranged along the circumferential direction on the trunk portion. The vacuum absorption panel has a panel body divided into two panel division parts by a valley line part extending along a height direction in a circumferential central part, each of the panel division parts, A plurality of lateral grooves are formed along the height direction so as to protrude outward from the container so that the top is formed along the height direction.

  According to the present invention, it is possible to uniformly deform each of the plurality of reduced-pressure absorption panels disposed in the container body portion along the circumferential direction, and to exhibit sufficient reduced-pressure absorption performance without causing appearance defects. it can.

It is a front view showing an outline of a synthetic resin container according to an embodiment of the present invention. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is explanatory drawing which shows typically the change of the decompression absorption panel before and behind a hot pack, (a) shows the state before a hot pack, (b) shows the state which swelled outside the container when hot-packing. Show.

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

  In the present embodiment, the container 1 is formed by molding a bottomed cylindrical preform by injection molding or compression molding using, for example, a thermoplastic resin, and the preform is formed by biaxial stretch blow molding in FIG. As shown, it is manufactured by molding into a predetermined container shape having a mouth part 2, a shoulder part 3, a body part 4, and a bottom part 5.

  In manufacturing such a container 1, as a thermoplastic resin to be used, any resin capable of forming the container 1 as described above can be used. Specifically, thermoplastic polyesters such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyarylate, polylactic acid or copolymers thereof, those blended with these resins or other resins are suitable. It is. In particular, an ethylene terephthalate thermoplastic polyester such as polyethylene terephthalate is preferably used. Further, acrylonitrile resin, polypropylene, propylene-ethylene copolymer, polyethylene and the like can be used.

The mouth portion 2 is a cylindrical portion in which a screw portion 21 for attaching a lid (not shown) is formed. The mouth portion 2 includes a portion having a substantially same diameter immediately below a support ring 22 generally formed in this type of container, and a shoulder portion formed in a truncated cone shape whose diameter increases toward the body portion 4. 3 is connected.
FIG. 2 shows a cut surface in the AA cross section of FIG. 1, but the thickness of the portion below the support ring 22 of the mouth portion 2 is omitted. Further, in FIG. 3, which is a BB cross-sectional view of FIG. 1, the thickness is also omitted.

The body portion 4 is a portion that occupies most of the height direction of the container 1, and the upper end side connected to the shoulder portion 3 is an upper cylindrical portion 41, and the lower end side connected to the bottom portion 5 is a lower cylindrical portion 42. . Further, a portion located between the upper cylindrical portion 41 and the lower cylindrical portion 42 is a panel forming portion 40 in which the six-sided vacuum absorbing panels 6 are arranged at predetermined intervals along the circumferential direction. The cross-sectional shape orthogonal to the height direction of the panel forming portion 40 is a hexagonal shape (see FIG. 3).
The container 1 provided with such a body part 4 has a so-called round bottle-like container shape whose cross-sectional shape is rounded as a whole.

  In the present embodiment, each of the upper cylindrical portion 41 and the lower mold cylindrical portion 42 of the body portion 4 is provided with a lateral bead 43 that extends in an annular shape along the circumferential direction, whereby the lateral direction ( Although the load bearing strength in the direction perpendicular to the height direction is increased, these lateral beads 43 can be omitted as appropriate.

  Here, the height direction means a direction orthogonal to the horizontal plane when the container 1 is erected on the horizontal plane with the mouth portion 2 up, and in this state, the vertical, horizontal, vertical and horizontal directions of the container 1 are defined. Shall be defined.

In the present embodiment, the reduced pressure absorption panel 6 has a vertically long rectangular shape, and includes a frame portion 60 that forms a step by sinking inward from the periphery of the container, and a panel body 61 that is connected to the frame portion 60. doing. And the panel main body 61 is divided into the two panel division parts 63 by the trough part 62 extended along the height direction in the circumferential direction center part.
In addition, each of the panel dividing portions 63 protrudes outward from the container so that a top portion 64 is formed along the height direction, and each panel dividing portion 63 includes a plurality of crossing the top portion 64. The lateral groove portions 65 are arranged along the height direction.

According to the present embodiment, the decompression absorption panel 6 has the panel body 61 having such a panel shape, so that when the contents are hot-packed, the decompression absorption panel 6 bulges outward from the container. Then, when the container is cooled to room temperature and the inside of the container is in a decompressed state, the decompression absorbing panel 6 is smoothly inverted from the state inflated to the outside of the container, so that the inside of the container is deformed. Can be unimpeded.
This is considered due to the following reasons.

  The decompression absorbing panel 6 is usually designed to be deformed so as to be largely curved starting from the upper and lower edge sides, and to be curved so as to be curved in the circumferential direction accordingly. For this reason, in the present embodiment, the panel main body 61 is divided into two panel division portions 63 by a valley line portion 62 extending along the height direction at the center portion in the circumferential direction, and each of the panel division portions 63 has a high height. It protrudes outward from the container so that the top 64 is formed along the vertical direction. However, if the vacuum absorbing panel 6 is designed in this way, the vacuum absorbing panel 6 swelled outside the container when the contents are hot-packed is, for example, as shown by a one-dot chain line in FIG. , It may extend in the circumferential direction and the shape may be fixed as it is. Even if it does not swell greatly until such a state is reached, the top 64 of the panel dividing portion 63 may bulge and may behave so as to prevent inversion during decompression.

Therefore, in the present embodiment, in addition to designing the reduced pressure absorption panel 6 as described above, each of the panel dividing portions 63 is provided with a lateral groove portion 65 so as to cross the top portion 64 thereof.
By doing so, as shown in FIG. 4 (a), the groove bottom length L ₁ which traces the vacuum panels 6 in the circumferential direction in the transverse plane containing the 65a of the lateral groove portion 65 is provided with a lateral groove 65 the corresponding vacuum panels 6 in cross-section to the absence circumferentially shorter than the length L ₂ was traced, further providing the lateral groove 65 so as to cross the top 64, it spreads the angle of the top 64 This also acts to suppress the sag, and as shown in FIG. 4B, the expansion of the reduced pressure absorption panel 6 to the outside of the container can be suppressed. Furthermore, each panel division | segmentation part 63 is divided by the horizontal groove part 65 without the top part 64 continuing, and since it has a high freedom degree of a deformation | transformation, it can be reversed smoothly from the state swelled outside the container. Thus, deformation into the container can be prevented.

  4 is an explanatory view schematically showing how the decompression absorption panel 6 is deformed by enlarging a portion surrounded by a chain line in FIG. 3, and FIG. The state is shown, and FIG. 4 (b) shows a state where the container swells outward when hot-packed.

  As described above, according to the present embodiment, while suppressing the expansion of the reduced pressure absorption panel 6 to the outside of the container when the contents are hot-packed, the reduced pressure absorption panel 6 then reduces the pressure in the container. It smoothly reverses from the state of inflating outward of the container without being hindered from being deformed inwardly of the container when absorbing water. For this reason, while responding to the request for thinning the container 1, each of the plurality of reduced pressure absorption panels 6 disposed in the circumferential direction in the body portion 4 is uniformly deformed, without causing an appearance defect. Sufficient decompression absorption performance can be exhibited.

And the horizontal groove part 65 is 30 to 90% of the length L _PV of the height direction of the panel main body 61 centering on the center part of the height direction of the panel main body 61 so that such an effect may be show | played favorably. It is preferable to line up in the range R. Further, the number of the lateral groove portions 65 arranged in each panel dividing portion 63 is preferably 2 to 26.

Further, in the example shown in FIG. 1, the lateral groove portion 65 is provided so as to cross the top portion 64 of the panel dividing portion 63 linearly and have a V-shaped cross section orthogonal to the longitudinal direction. Two inclined side surfaces 65b having a triangular shape with the groove bottom 65a as the bottom are formed above and below. By forming such an inclined side surface 65b, the rigidity of the periphery of the lateral groove portion 65 is increased, and thereby it is possible to more effectively suppress the outward expansion of the reduced pressure absorption panel 6 in the circumferential direction. .
Further, in the height direction, reversible deformation in which the two inclined side surfaces 65b open or close around the groove bottom 65a is possible, and the degree of freedom of deformation can be further increased. When the vacuum absorbing panel 6 swells outward from the container, the two inclined side surfaces 65b are deformed so as to open around the groove bottom 65a. At the time of decompression, the two inclined side surfaces 65b are deformed by the elastic restoring force. The deformation in the closing direction centering on the groove bottom 65a is urged, and the decompression absorbing panel 6 in a state of swelling outward from the container can be reversed more smoothly.

When it is set as such an aspect, it is preferable that the angle which the inclined side surface 65b of the horizontal groove part 65 which intersects in a V shape makes is 120-160 degrees.
If it is less than the above range, the rigidity of the periphery of the lateral groove portion 65 becomes too high, and there is a tendency that the reduced pressure absorbing panel 6 acts to prevent the inverted vacuum absorbing panel 6 from being inverted from a state of swelling outward. On the other hand, if the above range is exceeded, there is a tendency that the rigidity around the lateral groove portion 65 becomes insufficient and the decompression absorbing panel 6 cannot be sufficiently prevented from expanding outward from the container.

  The lateral groove 65 preferably has a V-shaped cross section perpendicular to the longitudinal direction. However, if the same effect as described above can be obtained, the groove bottom 65a of the lateral groove 65 has a certain width. The inclined side surface 65b formed in the lateral groove portion 65 may be a flat surface or a curved surface. Moreover, although it is preferable to provide the horizontal groove part 65 so that it may cross the top part 64 orthogonally to a height direction, there may be some inclination.

In the example shown in FIG. 1, each of the lateral groove portions 65 arranged in the panel dividing portion 63 is provided apart from the edge of the panel main body 61. By doing in this way, when the decompression absorption panel 6 swells outside the container, in the circumferential direction, a line connecting one end on the edge side of the lateral groove portion 65 adjacent in the vertical direction (positioned on the front in FIG. 1). The decompression absorption panel 6 is deformed so as to warp starting from the starting point of the decompression absorption panel 6 indicated by a two-dot chain line (see FIG. 4B).
This reduces the amount of deformation when the vacuum absorbing panel 6 bulges outward from the container, thereby suppressing the bulging of the vacuum absorbing panel 6 outward from the container more effectively and deforming the vacuum absorbing panel 6 so as to warp. Due to the elastic restoring force 6, the decompression absorbing panel 6 swelled outward from the container can be reversed more smoothly during decompression.
In addition, in FIG.4 (b), the position used as the starting point which deform | transforms so that the decompression absorption panel 6 may curve may be pointed out with the arrow.

Further, in the present embodiment, the length _{L TG} of the lateral groove 65, preferably a 5-12 mm. Further, the length L _TG of the lateral groove portion 65 is preferably in the range of 40 to 90% with respect to the circumferential length of the panel dividing portion 63.
If it is less than the above range, there is a tendency that the rigidity around the lateral groove portion 65 becomes insufficient and the decompression absorbing panel 6 cannot be sufficiently prevented from expanding outward from the container. On the other hand, if it exceeds the above range, for example, when the lateral groove portion 65 is provided apart from the edge of the panel body 61, the separation distance cannot be secured sufficiently, and the reduced pressure absorption panel 6 as described above. It is sufficient that the starting point when deforming so as to warp moves from the line connecting one end of the lateral groove portion 65 adjacent to the upper and lower sides to the edge side of the panel body 61, and the decompression absorption panel 6 swells outward from the container. There is a tendency to be unable to control.

Further, the depth of the lateral groove portion 65 (the difference in height between the groove bottom and the top portion 64 when the lateral groove portion 65 is not provided in the cross section including the groove bottom of the lateral groove portion 65) _DTG is 0.5 to 1 It is preferably 0.0 mm.
If it is less than the above range, there is a tendency that the rigidity around the lateral groove portion 65 becomes insufficient and the decompression absorbing panel 6 cannot be sufficiently prevented from expanding outward from the container. On the other hand, if the above range is exceeded, the rigidity around the lateral groove portion 65 becomes too high, and there is a tendency that the reduced pressure absorption panel 6 is prevented from being inverted from a state where it is swollen outward from the container. Seen.

Although not shown in particular, in order to adjust the rigidity of the reduced pressure absorption panel 6 and deform the reduced pressure absorption panel 6 in a well-balanced manner, the length L _TG and the depth D of the _horizontal groove portion 65 depending on the position where the horizontal groove portion 65 is provided. _TG both or one of may be different appropriate.
In the present embodiment, the numerical value range is set by taking the container 1 having a capacity of 500 ml as an example, and these numerical values can be appropriately adjusted according to the capacity of the container 1.

Further, in the present embodiment, the arrangement of the horizontal groove portions 65 arranged in the panel dividing portion 63 is not limited, but one of the plurality of horizontal groove portions 65 is most outward from the container when the contents are hot-packed. It is preferable that the panel body 61 that tends to swell greatly is arranged at the center in the height direction.
Further, the lateral groove portion 65 is formed so that the panel body 61 is symmetrical (including substantially symmetrical) in the vertical direction around the center in the height direction of the panel body 61 so that the panel body 61 can be deformed in a balanced manner along the height direction. It is preferable to arrange.

  In particular, in the present embodiment, by combining these arrangements, as shown in FIG. 1, the number of arrangement of the lateral groove portions 65 arranged in the panel dividing portion 63 is an odd number (11 in the example shown in FIG. 1), and the middle thereof. The horizontal groove portion 65 is positioned at the center in the height direction of the panel body 61, and the horizontal groove portion 65 is evenly arranged along the height direction so as to be vertically symmetrical about the center portion in the height direction of the panel body 61. It is preferable to line up. Further, the panel main body 61 is symmetrical (laterally symmetric) between the one panel dividing portion 63 and the other panel dividing portion 63 with the valley line portion 62 as the axis of symmetry so that the panel main body 61 can be deformed with good balance even in the circumferential direction. It is preferable to arrange the horizontal groove portions 65 as described above. By arranging the horizontal groove portions 65 in a more symmetrical arrangement, the panel body 61 is deformed in a more balanced manner.

  Further, in the example shown in FIG. 1, the panel dividing portion 63 is raised so that two inclined surfaces intersect at the top portion 64 and a ridge line is formed at the top portion 64, but the inclined surface is flat or curved. , Or a combination of one or both of these.

In addition, each panel dividing portion 63 is preferably raised so that the top portion 64 is formed along the height direction at a position closer to the valley line portion 62 side than the circumferential central portion of the panel dividing portion 63. . Further, the panel dividing portion 63 is projected outward from the container so that the top portions 64 are formed along the height direction at positions where the panel body 61 is roughly divided into three in the circumferential direction by the top portions 64. More preferably.
By doing in this way, the deformation | transformation amount when the decompression absorption panel 6 deform | transforms inside a container can be increased, and the decompression absorption performance can be improved.

Also, considering that the amount of deformation when the reduced pressure absorption panel 6 is deformed inward of the container and increasing the reduced pressure absorption performance is taken into consideration, the top 64 formed in the panel dividing portion 63 has a center in the height direction. It is preferable that the container gradually protrudes outward from the container.
At this time, a line connecting the top portions 64 (a line along the top portion 64 when the lateral groove portion 65 is not provided) may be a curved line that gently curves, or a straight line that is bent at the center in the height direction. It may be.

Further, in the example shown in FIG. 1, the valley line portion 62 extending along the height direction at the circumferential central portion of the panel main body 61 includes an inclined surface of one panel dividing portion 63 and the other panel dividing portion 63. It is formed as a V-shaped vertical groove having a trough line intersecting with the inclined surface of the groove.
At this time, the angle at which the inclined surface of one panel dividing portion 63 and the inclined surface of the other panel dividing portion 63 intersect is appropriately designed in consideration of mold opening of the blow molding die. Is a flat surface, it is preferable to form the valley portion 62 so that the angle formed by both inclined surfaces is 120 to 160 °.

  By forming the valley line portion 62 as a V-shaped vertical groove, it is possible to suppress the expansion of the reduced pressure absorption panel 6 to the outside of the container. Further, by forming the valley line portion 62 as a V-shaped vertical groove, the valley line portion 62 can be a guiding portion when the reduced pressure absorption panel 6 is deformed inward of the container at the time of decompression. .

  In consideration of increasing the amount of deformation when the reduced pressure absorption panel 6 is deformed inward of the container and enhancing its reduced pressure absorption performance, the valley line portion 62 is projected outwardly of the container or inward of the container. It is preferable that the film is gently curved along the height direction. Furthermore, the valley line part 62 is formed so as to extend in the height direction at a position recessed toward the inner side of the container (see FIG. 3), whereby the panel dividing part 63 is formed from the frame part 60 side to the valley line. It is preferable to form it so as to be entirely inclined so as to enter the inside of the container toward the portion 62.

  In addition, in the transfer process when hot-packing the contents, the panel main body 61 does not rub against other containers, transfer devices, or the like at the upper or lower end of the frame portion 60 of the reduced pressure absorption panel 6. In the cross section, it is preferable that the panel body 61 is within a virtual arc formed by a radius connecting the upper end or the lower end and the container center.

  Although the present invention has been described with reference to the preferred embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. Nor.

For example, in the above-described embodiment, the example in which the six-sided vacuum absorption panel 6 is disposed on the container body 4 has been described, but the present invention is not limited thereto. When the present invention is applied to a round bottle-shaped synthetic resin container, the number of the vacuum absorbing panels 6 can be appropriately selected within a range of four to eight.
In the above-described embodiment, the example in which the shape of the reduced pressure absorption panel 6 is a vertically long rectangular shape has been described. However, the shape is not limited to this, and a vertically long oval shape may be used.

  In the above-described embodiment, an example in which the present invention is applied to a round bottle-shaped synthetic resin container has been described. However, the present invention is a so-called square shape in which the cross-sectional shape is a square shape or a rectangular shape. It can also be applied to a bottle-shaped synthetic resin container. In this case, the angle between the inclined surface of one panel dividing portion 63 and the inclined surface of the other panel dividing portion 63 is such that when both the inclined surfaces are flat, the angle formed by both inclined surfaces is the same. It is preferable to form the valley line part 62 so that it may become 120-170 degrees.

  When applied to a rectangular bottle-shaped synthetic resin container, the reduced-pressure absorption panel 6 may be provided with four reduced-pressure absorption panels 6 along the circumferential direction on the side surfaces of the four body portions. Is a rectangular bottle-shaped synthetic resin container, the decompression absorption panel 6 in the present invention is disposed only on the two opposing surfaces on the long side, and another surface is provided on the two surfaces on the short side. A vacuum absorbing panel having a panel shape may be provided. In any case, by disposing the reduced pressure absorption panel 6 in the present invention along the circumferential direction in the container body 4, the reduced pressure absorption panel 6 is uniformly deformed and sufficiently reduced in pressure without causing poor appearance. Absorption performance can be demonstrated.

  The present invention as described above can be applied to a synthetic resin container including a reduced pressure absorption panel that absorbs pressure changes in the container after filling and sealing the contents.

DESCRIPTION OF SYMBOLS 1 Container 2 Mouth part 3 Shoulder part 4 Trunk part 5 Bottom part 6 Pressure-reduction absorption panel 61 Panel main body 62 Valley line part 63 Panel division part 64 Top part 65 Horizontal groove part

Claims (14)

A synthetic resin container comprising a mouth portion, a shoulder portion, a trunk portion, and a bottom portion, and having a plurality of reduced-pressure absorption panels arranged along the circumferential direction on the trunk portion,
The reduced pressure absorption panel has a panel body divided into two panel division parts by a valley line part extending along the height direction in the circumferential center part,
Each of the panel divisions bulge outward from the container so that a top is formed along the height direction,
A synthetic resin container, wherein a plurality of lateral groove portions crossing the top portion are arranged along a height direction.   2. The synthetic resin container according to claim 1, wherein the lateral groove portions are arranged in a range of 30 to 90% of a length in the height direction of the panel body with a center portion in the height direction of the panel body as a center. .   The synthetic resin container according to claim 1 or 2, wherein a cross section perpendicular to the longitudinal direction of the lateral groove portion is V-shaped.   The synthetic resin container according to any one of claims 1 to 3, wherein the lateral groove portion is provided apart from an edge of the panel main body.   The length of the said horizontal groove part is 5-12 mm, The synthetic resin container as described in any one of Claims 1-4.   The synthetic resin container according to any one of claims 1 to 5, wherein a depth of the lateral groove portion is 0.5 to 1.0 mm.   The synthetic resin container according to any one of claims 1 to 6, wherein both or one of the length and the depth of the lateral groove is made different depending on a position where the lateral groove is provided.   The synthetic resin container according to any one of claims 1 to 7, wherein the horizontal groove portions are arranged in an array in which one of the horizontal groove portions is positioned at a center portion in the height direction of the panel body.   The synthetic resin container according to any one of claims 1 to 8, wherein the lateral groove portions are arranged so as to be vertically symmetrical about a center portion in the height direction of the panel body.   The number of the lateral groove portions arranged in the panel dividing portion is an odd number, and the middle lateral groove portion is positioned at the center in the height direction of the panel body, and the lateral groove portions are evenly distributed along the height direction. The synthetic resin container according to any one of claims 1 to 9, which is arranged.   The synthetic resin container according to any one of claims 1 to 10, wherein the lateral groove portions are arranged so as to be symmetrical with respect to the valley line portion as a symmetry axis.   The synthetic resin container according to any one of claims 1 to 11, wherein the panel dividing portion protrudes such that two inclined surfaces intersect at the top portion and a ridge line is formed at the top portion.   The synthetic resin container according to any one of claims 1 to 12, wherein the valley portion is formed as a V-shaped vertical groove.   The synthetic resin container according to any one of claims 1 to 13, wherein the valley portion is convexly curved outward or inward of the container.