JP5645598B2 - Bottle - Google Patents

Description

  The present invention relates to a bottle.

  Conventionally, as a bottle formed of a synthetic resin material, for example, as shown in Patent Document 1 below, the barrel is placed on the upper barrel on the mouth side and the lower barrel on the bottom side. There is known a configuration in which circumferential grooves for partitioning are extended over the entire circumference.

Japanese Patent Laid-Open No. 10-218148

  However, in a conventional bottle, an unexpected portion is locally bent and deformed by a compressive load in the bottle axial direction applied when, for example, the contents are filled or transported or stored in a stacked state. There was a risk of buckling (plastic deformation).

  The present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a bottle that can suppress the occurrence of buckling (plastic deformation).

In order to solve the above-described problems and achieve such an object, the bottle of the present invention is a bottomed cylindrical bottle, and the trunk portion is connected to the upper barrel on the mouth side. A circumferential groove that divides into a lower body portion on the bottom side and the bottom side is extended over the entire circumference, and at least one side surface of both side surfaces that define the circumferential groove has a stepped portion that extends over the entire circumference. A small groove extending from the bottom surface side of the circumferential groove toward the outer side in the radial direction is formed on the side surface formed in a multistage shape with the stepped portion among the both side surfaces. A large number of holes are formed over the entire circumference .

According to the present invention, since at least one side surface of the both side surfaces is formed in a multi-stage shape, when a compressive load in the bottle axial direction is applied to the bottle, the side surfaces are formed in a multi-stage shape. By elastically deforming the formed side surface, the body portion contracts and deforms in the bottle axial direction while absorbing this compressive load.
Therefore, when the aforementioned compressive load is applied, the inner pressure of the bottle increases, so that the resistance to the compressive load can be increased, and the upper body part and the lower body part are connected to the peripheral groove connecting portions. It is also possible to suppress the load, and the occurrence of local bending deformation can be reliably suppressed, and the occurrence of buckling (plastic deformation) can be suppressed.
In addition, in the case where the step portion is formed only on one of the both side surfaces and the step portion is not formed on the other side, the other side that is difficult to deform is the fixed side, and the one side that is easily deformed is the movable side, The positional deviation along the bottle radial direction can be effectively suppressed.

In addition , since a large number of small grooves are formed on the side surface formed in a multi-stage shape among the both side surfaces, when the side surface is elastically deformed as described above, the groove width of each small groove is expanded or reduced. This side surface can be easily expanded and contracted uniformly over the entire circumference. Therefore, when the barrel portion contracts and deforms in the bottle axis direction as described above, the axial lines of the upper barrel portion and the lower barrel portion are prevented from being displaced from each other, and the occurrence of buckling (plastic deformation) is ensured. Can be suppressed.
In addition, since a large number of small grooves are formed, it is possible to suppress the occurrence of plastic deformation such as creases on the side surfaces formed in a multi-stage shape.

  Moreover, the outer diameter of the connection part with the said circumferential groove in the said upper side trunk | drum may differ from the outer diameter of the connection part with the said circumferential groove in the said lower side trunk | drum.

  In this case, the outer diameter of the connection portion with the circumferential groove in the upper body portion and the outer diameter of the connection portion with the circumferential groove in the lower body portion are different from each other. When the barrel portion shrinks and deforms in the bottle axial direction as the circumferential groove is crushed, the larger outer diameter of the connecting portion of the upper barrel portion and the lower barrel portion covers the smaller one. By being supported by the two, it is possible to reliably suppress the positional deviations of the two axes.

  According to the present invention, occurrence of buckling (plastic deformation) can be suppressed.

It is a side view of the bottle shown as one embodiment concerning the present invention. It is a principal part longitudinal cross-sectional view of the bottle shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the bottle 1 according to this embodiment includes a mouth portion 11, a shoulder portion 12, a trunk portion 13, and a bottom portion 14, and these 11 to 14 are positioned on a common axis with their respective central axes. In this state, they are connected in this order from one side to the other side in the common axis direction. The bottle 1 is integrally formed of a synthetic resin material such as polyethylene terephthalate by, for example, blow molding.

Here, in this embodiment, the cross-sectional shape of all the parts 11-14 of the bottle 1 is circular shape, The said common axis is a straight line which passes along the circular center part which this cross section makes.
Hereinafter, this common axis is referred to as the bottle axis O, the mouth 11 side is referred to as the upper side, and the bottom 14 side is referred to as the lower side along the bottle axis O direction. Furthermore, a direction perpendicular to the bottle axis O is referred to as a radial direction, and a direction around the bottle axis O is referred to as a circumferential direction.

In the illustrated example, a male screw portion 11a is formed on the outer peripheral surface of the mouth portion 11, and a cap (not shown) is detachably screwed to the male screw portion 11a.
A neck ring 15 extending over the entire circumference is projected from the connecting portion between the mouth portion 11 and the shoulder portion 12 toward the outer side in the radial direction.
The shoulder portion 12 is gradually reduced in diameter from the bottom to the top. A plurality of vertical grooves 12 a are formed in the shoulder portion 12 at intervals in the circumferential direction.

A circumferential groove 16 that divides the body portion 13 into an upper upper body portion 17 and a lower lower body portion 23 is extended over the entire circumference of the body portion 13.
In the present embodiment, the circumferential groove 16 is formed at a substantially central portion of the body portion 13 in the bottle axis O direction. Moreover, the trunk | drum 13 is formed so that a deformation | transformation deformation | transformation is possible in the bottle axis | shaft O direction because the groove width of the circumferential groove 16 becomes narrow.

In the upper body portion 17, an annular groove 17 a having a shallower depth than the circumferential groove 16 is extended over the entire circumference at intervals in the bottle axis O direction. In addition, the space | interval between the annular grooves 17a adjacent in the bottle axis | shaft O direction is mutually equal. The plurality of annular grooves 17a have the same shape and size. The bottom surface of the annular groove 17a is formed in a concave curved surface shape.
Further, in the upper body portion 17, a portion located between the annular grooves 17 a adjacent to each other in the bottle axis O direction has a plurality of ridges 17 b protruding outward in the radial direction and extending over the entire circumference in the bottle axis O direction. It is connected continuously.

A plurality of reduced-pressure absorption panels 24 that are recessed inward in the radial direction are formed in the lower body portion 23 at intervals in the circumferential direction, and each reduced-pressure absorption panel 24 is formed from the lower side in the bottle axis O direction. As it goes upward, it is inclined with respect to the bottle axis O direction so as to gradually extend from one side in the circumferential direction to the other side.
Each decompression absorption panel 24 has a substantially rectangular shape that is long in a direction inclined with respect to the bottle axis O direction as described above in a side view of the body portion 13, and the size in the circumferential direction is downward from above. It becomes narrower gradually toward Further, in the illustrated example, each reduced pressure absorption panel 24 communicates with the circumferential groove 16 from below.
Further, in the lower body portion 23, the protruding portion 23a located between the pressure-absorbing panels 24 adjacent in the circumferential direction is inclined with respect to the bottle axis O direction as described above in a side view of the body portion 13. It has a substantially triangular shape that is long in the direction, and the size in the circumferential direction gradually increases from the top to the bottom.

  Both side surfaces 25 and 26 defining the circumferential groove 16 are gradually separated from each other in the bottle axis O direction from the inner side to the outer side in the radial direction. In the illustrated example, both the side surfaces 25 and 26 are gradually separated from each other in the bottle axis O direction from the inner side to the outer side in the radial direction.

As shown in FIG. 2, the upper connecting portion 27 that connects the upper side surface 25 located on the upper side of the both side surfaces 25, 26 and the upper body portion 17 is a concave curved surface that is recessed toward the inside in the radial direction. It is formed in a shape. In addition, the lower connecting portion 28 that connects the lower side surface 26 located on the lower side of the both side surfaces 25 and 26 and the lower body portion 23 is formed in a curved surface shape protruding outward in the radial direction. Yes. In the illustrated example, the curvature radius of the upper connection portion 27 is smaller than the curvature radius of the lower connection portion 28.
For example, the curvature radius of the upper connection portion 27 may be larger than the curvature radius of the lower connection portion 28, or the curvature radii of the upper connection portion 27 and the lower connection portion 28 may be equal to each other.

In the present embodiment, the upper side surface 25 is formed in a multistage shape having a step portion 25a extending over the entire circumference.
The upper side surface 25 is partitioned into an upper portion 31 located on the upper side and a lower portion 30 located on the lower side by the step portion 25a.
The lower portion 30 has an inner end surface 30a extending from the bottom surface 16a of the circumferential groove 16 toward the outer side in the radial direction, and a protrusion formed in a curved shape that protrudes from the outer side in the radial direction to the inner end surface 30a toward the outer side in the radial direction. A curved surface portion 30b, and an intermediate surface 30c extending from the upper surface to the protruding curved surface portion 30b and extending upward are provided.
The upper part 31 connects the step part 25 a and the upper connection part 27.

The inner end surface 30a of the lower portion 30 is formed in a flange shape that protrudes substantially parallel to the radial direction from the bottom surface 16a of the circumferential groove 16 and continuously extends over the entire circumference.
The intermediate surface 30c of the lower part 30 is formed in the cylinder shape extended substantially parallel along the bottle axis | shaft O direction.
The upper portion 31 is gradually reduced in diameter from the upper side to the lower side, and is formed in a curved surface shape that protrudes outward in the radial direction.

In the example shown in the figure, the radius of curvature of the upper portion 31 is equal to the radius of curvature of the projecting curved surface portion 30b of the lower portion 30, but these curvature radii may be different from each other.
Further, although the size of the upper portion 31 in the bottle axis O direction is smaller than the size of the lower portion 30 in the bottle axis O direction, the size of the upper portion 31 in the bottle axis O direction is smaller than the size of the lower portion 30 in the bottle axis O direction. It may be larger than the size.
Furthermore, the size of the upper portion 31 in the bottle radial direction is smaller than the size of the lower portion 30 in the bottle radial direction, but the size of the upper portion 31 in the bottle radial direction is equal to or greater than the size of the lower portion 30 in the bottle radial direction. Also good.

A large number of small grooves 29 extending radially outward from the bottom surface 16a side of the circumferential groove 16 are formed on the upper side surface 25 over the entire circumference at intervals in the circumferential direction.
The small groove 29 extends from the radially inner end of the inner end face 30a of the lower portion 30 to the upper end of the upper portion 31 via the step portion 25a.
Here, the inclination angle of the inner end surface 30 a in the lower portion 30 of the upper side surface 25 with respect to the horizontal plane orthogonal to the bottle axis O is smaller than that of the lower side surface 26.
For example, the inclination angle of the inner end face 30a of the upper side surface 25 with respect to the horizontal plane is 10 ° or less, preferably 5 ° or less (including horizontal), and the inclination angle of the lower side surface 26 with respect to the horizontal plane is 30 ° or less, preferably 20 It is not less than 25 ° and not more than 25 °.

Further, in the present embodiment, the outer diameter at the lower end of the upper trunk portion 17 and the outer diameter at the upper end of the lower trunk portion 23 are different from each other.
In the present embodiment, the outer diameter at the lower end of the upper trunk portion 17 is larger than the outer diameter at the upper end of the lower trunk portion 23. The outer diameter at the upper end of the lower body portion 23 is equal to the outer diameter of the intermediate surface 30 c of the lower portion 30 of the upper side surface 25.
Note that the lower end of the upper trunk portion 17 is connected to the upper side surface 25 via the upper connection portion 27, and the upper end of the lower trunk portion 23 is connected to the lower side surface 26 via the lower connection portion 28. .

As described above, according to the bottle 1 according to the present embodiment, since the upper side surface 25 is formed in a multi-stage shape, when a compressive load in the bottle axis O direction is applied to the bottle 1, the upper side surface 25. By elastically deforming, the body 13 contracts and deforms in the bottle axis O direction while absorbing this compressive load.
Therefore, when the aforementioned compressive load is applied, the internal pressure of the bottle 1 is increased, so that the resistance against the compressive load can be increased, and the upper body portion 17 and the lower body portion 23 each have a circumferential groove 16. It is also possible to suppress the load applied to the connection portion, and the occurrence of local bending deformation can be reliably suppressed, and the occurrence of buckling (plastic deformation) can be suppressed.
Furthermore, since the step 25a is formed only on the upper side 25 and the step is not formed on the lower side 26 of the both side surfaces 25, 26, the lower side 26 which is difficult to deform is fixed as the fixed side. Since the easy upper side 25 side becomes the movable side, it is possible to effectively suppress the positional deviation along the bottle radial direction between the two 25 and 26.

In addition, since a large number of small grooves 29 are formed on the upper side surface 25 formed in a multi-stage shape, when the upper side surface 25 is elastically deformed as described above, the groove width of each small groove 29 is increased or decreased. Thus, the upper side surface 25 can be easily expanded and contracted uniformly over the entire circumference. Therefore, when the barrel portion 13 contracts and deforms in the bottle axis O direction as described above, the axial lines of the upper barrel portion 17 and the lower barrel portion 23 are prevented from being displaced from each other, and buckling (plastic deformation). Can be reliably suppressed.
Furthermore, since a large number of small grooves 29 are formed, it is possible to suppress the occurrence of plastic deformation such as creases in the upper side surface 25 formed in a multi-stage shape.

  Moreover, since the outer diameter at the lower end of the upper body part 17 is larger than the outer diameter at the upper end of the lower body part 23, a compressive load in the bottle axis O direction is applied to the bottle 1 and the circumferential groove 16 is crushed. When the barrel portion 13 is contracted and deformed in the bottle axis O direction, the upper barrel portion 17 is supported so as to cover the lower barrel portion 23, so that the axes of the two 17, 23 are displaced from each other. Can be reliably suppressed.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, in the above-described embodiment, the reduced pressure absorption panel 24 is formed in the lower body portion 23, but the reduced pressure absorption panel 24 may not be formed.
Further, the reduced pressure absorption panel 24 is not limited to the above embodiment, and may be appropriately changed, for example, formed in a rectangular shape extending along the bottle axis O direction.
Furthermore, the annular groove 17a and the protrusion 17b may not be formed in the upper body portion 17.

Further, the small groove 29 may not be formed in the upper side surface 25.
The form of the small groove 29 is not limited to the above embodiment, and may be changed as appropriate.
Furthermore, a plurality of stepped portions 25a may be formed on the upper side surface 25 with an interval in the bottle axis O direction.
Further, the step portion 25a may not be formed on the upper side surface 25, and the lower side surface 26 may be formed in a multi-step shape having step portions, or both the side surfaces 25 and 26 that define the circumferential groove 16 are both You may form in the multistage shape which has a step part.
Further, the upper connection portion 27 that connects the upper side surface 25 and the upper body portion 17 may not be provided, and the upper side surface 25 and the upper body portion 17 may be directly connected.

  In addition, it is possible to appropriately replace the constituent elements in the above-described embodiments with well-known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

  Occurrence of buckling (plastic deformation) can be suppressed.

DESCRIPTION OF SYMBOLS 1 Bottle 11 Mouth part 13 Body part 14 Bottom part 16 Circumferential groove 16a Bottom surface 17 Upper body part 23 Lower body part 25 Upper side surface 26 Lower side surface 29 Small groove O Bottle axis

Claims (2)

A bottomed cylindrical bottle,
A circumferential groove that divides the body portion into an upper body portion on the mouth side and a lower body portion on the bottom side extends over the entire circumference of the body portion,
At least one side surface of both side surfaces defining the circumferential groove is formed in a multi-stage shape having a step portion extending over the entire circumference ,
Among the two side surfaces, a plurality of small grooves extending from the bottom surface side of the circumferential groove toward the outside in the radial direction are formed on the side surface formed in a multi-stage shape with the stepped portion, and spaced from each other in the circumferential direction. A bottle characterized by being formed over . The bottle according to claim 1 ,
The bottle characterized in that an outer diameter of a connection portion between the upper body portion and the circumferential groove is different from an outer diameter of a connection portion between the lower body portion and the circumferential groove.

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