JP6412717B2 - Plastic bottle - Google Patents

Description

  The present invention relates to a synthetic resin bottle.

Conventionally, as a bottle formed of a synthetic resin material in a bottomed cylindrical shape, for example, as described in Patent Document 1 below, a cylindrical body portion is provided with a panel portion that is recessed radially inward. A bottle is known in which a plurality of panels are formed at intervals in the direction, and between the adjacent panel portions in the circumferential direction are pillar portions.
In this bottle, for example, when the temperature of the contents sealed in the bottle is lowered and the inside of the bottle is in a decompressed state, the panel portion is preferentially deformed inward in the radial direction. It is possible to absorb the reduced pressure of the bottle while suppressing the deformation in the portion.

Japanese Patent No. 4212910

By the way, as a content filled in the bottle, for example, a content having viscosity (viscosity) may be filled. In this case, the contents may not be poured out simply by tilting the bottle, and the body of the bottle needs to be squeezed.
However, in the above-described conventional bottle, when the body portion is squeezed and deformed, the column portion is bent by being pushed inward in the radial direction, and it is easy to bend a crease. For this reason, there are cases where squeeze deformation cannot be performed appropriately. In addition, the above-described conventional bottles are not suitable for dispensing by squeeze deformation because it is difficult to squeeze the body part.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a bottle that can be easily squeezed and the column portion is not easily bent during squeeze deformation.

In order to achieve the above object, the present invention provides the following means.
(1) In the bottle according to the present invention, a plurality of panel portions that are recessed inward in the radial direction are formed in the body portion having a circular shape in cross section in the circumferential direction, and adjacent to each other in the circumferential direction. The bottle portion between the panel portions is a column portion, and the body portion gradually decreases in diameter from the outside toward the inside along the bottle axial direction, and the column portion extends along the bottle axial direction. The lateral width along the circumferential direction is formed to be wider than the lateral width at other positions of the body portion at the position where the diameter of the body portion is most reduced, and the panel portion is A panel bottom wall portion located radially inward of the outer peripheral surface, and a panel side wall portion extending radially outward from an outer peripheral edge of the panel bottom wall portion, wherein the panel bottom wall portion is circumferential. The horizontal width along the width corresponds to the horizontal width of the column portion, and the body portion has the smallest diameter. The vertical side wall portion connected to the column portion of the panel side wall portion continuously extends along the bottle axial direction. The panel portions and the column portions are alternately arranged in the circumferential direction, and the body portion is formed with a lateral side wall portion extending in the circumferential direction located at both ends in the bottle axial direction of the panel side wall portion. A concave groove that is recessed inward in the radial direction is continuously formed over the entire circumference in the portion .

  According to the bottle of the present invention, the body portion has a curved shape that gradually decreases in diameter from the outer side (upper and lower end portions) in the bottle axial direction toward the inner side (center portion). In other words, the body portion has a constricted shape with the diameter of the center portion in the bottle axial direction being the smallest. Therefore, it can be set as the trunk | drum excellent in grip property, and it is easy to perform a squeeze deformation | transformation easily, hold | gripping a trunk | drum. Therefore, even if the contents having viscosity are filled in the bottle, the contents can be smoothly poured out.

In addition, the columnar portion formed in the body portion is formed so that the lateral width along the circumferential direction is widest at the minimum diameter position (the position where the diameter is reduced most) of the body portion. During squeeze deformation, the stress acting on the body portion tends to act on the minimum diameter portion of the body portion, and the amount of deformation in the minimum diameter portion tends to be large. In this respect, since the column portion is formed to be the widest at the minimum diameter position of the body portion, it is easy to disperse the compressive force toward the radially inner side applied during squeeze deformation. Therefore, at the time of squeeze deformation, the column portion can be prevented from being bent radially inward while the column portion is deformed along with the deformation of the body portion. For this reason, for example, squeeze deformation can be appropriately repeated, and the contents can be poured out to the end.
Further, since the column portion is formed to be the widest at the minimum diameter position of the neck portion having a constricted shape, a portion having a low rigidity of the barrel portion can be supplemented by the rigidity of the column portion.
Furthermore, since the vertical side wall portion in the panel portion is not divided in the bottle axial direction and continuously extends along the bottle axial direction, the portion (stress that becomes the starting point of bending when the squeeze deformation of the trunk portion is performed. (Concentrated portion) can be excluded from the vertical side wall. Therefore, the column portion can be further prevented from being bent.
Furthermore, in addition to being able to achieve the above-described effects, the vertical side wall portion is not divided in the bottle axial direction, so that preferential deformation of the panel portion during decompression in the bottle can be secured, and the decompression absorption performance is hindered. Can be prevented.

  According to the present invention, the squeeze deformation can be easily performed, and the column portion is not easily bent at the time of the squeeze deformation, so that the contents can be appropriately poured out.

It is a figure which shows embodiment of the bottle which concerns on this invention, Comprising: It is a front view of a bottle.

Hereinafter, an embodiment of a bottle according to the present invention will be described with reference to the drawings.
(Composition of bottle)
As shown in FIG. 1, the bottle 1 of the present embodiment includes a mouth part 2, a shoulder part 3, a trunk part 4, and a bottom part 5, and in a state in which each central axis is located on a common axis, They are arranged in this order.

Hereinafter, the above-described common axis is referred to as a bottle axis O, and the mouth 2 side is referred to as the upper side and the bottom 5 side is referred to as the lower side along the bottle axis O direction. Further, in a plan view viewed from the bottle axis O direction, a direction orthogonal 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.
The bottle 1 is formed by, for example, blow molding a preform formed into a bottomed cylindrical shape by injection molding, and is integrally formed of a synthetic resin material.

A cap (not shown) can be attached to the mouth portion 2. The mouth portion 2, the shoulder portion 3, the trunk portion 4, and the bottom portion 5 each have a circular cross-sectional view shape along the radial direction. A first concave groove 10 and a second concave groove 15 that are recessed inward in the radial direction are respectively formed in the connection portion between the shoulder portion 3 and the trunk portion 4 and the connection portion between the trunk portion 4 and the bottom portion 5. It is formed continuously over.
However, the first concave groove 10 and the second concave groove 15 do not need to have a continuous annular shape. For example, a plurality of first concave grooves 10 are formed at intervals in the circumferential direction, and each concave groove is formed in a circumferential groove shape extending in the circumferential direction. You may do it.

The body portion 4 is formed in a cylindrical shape and has a curved shape that gradually decreases in diameter from the outer side (upper and lower end portions) in the bottle axis O direction toward the inner side (center portion). That is, the trunk | drum 4 is made into the constriction shape in which the center part of the bottle axis | shaft O direction reduced diameter most.
Note that the upper end portion of the body portion 4 in the bottle axis O direction (portion located below the first concave groove 10) and the lower end portion of the body portion 4 in the bottle axis O direction (located above the second concave groove 15). Part) is the maximum outer diameter part of the bottle 1.

The bottom portion 5 is formed in a bottomed cylindrical shape, the heel portion 11 whose upper end opening portion is connected to the lower end opening portion of the body portion 4, the lower end opening portion of the heel portion 11 is closed, and the outer peripheral edge portion is a grounding portion. 13 and a bottom wall portion 12.
The heel portion 11 includes a lower heel portion 11A that is continuous with the ground contact portion 13 from the outside in the radial direction, an upper heel portion 11B that is continuous from the lower side with the second concave groove 15 interposed between the body portion 4, and a lower heel portion 11A and an upper heel portion 11B. 11C which connects and.

  The lower heel portion 11A is formed to have a smaller diameter than the upper heel portion 11B, and the connecting portion 11C is gradually reduced in diameter from the upper side toward the lower side. The upper heel portion 11 </ b> B is formed to be equal to the outer diameter of the lower end portion of the body portion 4.

  A plurality of vacuum absorbing panel portions 20 that are recessed radially inward are formed in the body portion 4 at intervals in the circumferential direction. In the trunk portion 4, a portion located between the panel portions 20 adjacent in the circumferential direction is a column portion 21 extending along the bottle axis O direction. That is, in the body portion 4, the recessed panel portions 20 and the protruding column portions 21 are alternately arranged in the circumferential direction over almost the entire length of the body portion 4.

  The panel portion 20 is formed in a rectangular shape having the bottle axis O direction as a longitudinal direction when viewed from the outside in the radial direction, and a panel bottom wall portion 25 positioned radially inward from the outer peripheral surface of the body portion 4, and the panel bottom wall The panel 25 has a panel side wall 26 extending from the outer peripheral edge of the portion 25 toward the radially outer side and surrounding the panel bottom wall 25 over the entire circumference.

  Among the panel side wall portions 26, a pair of vertical side wall portions 26 a that are connected to both ends in the circumferential direction of the panel bottom wall portion 25 and extend in the bottle axis O direction are arranged in the circumferential direction from the radially inner side toward the radially outer side. The inclined surface is inclined toward the outside (the direction in which the vertical side wall portions 26a are separated). The pair of vertical side wall portions 26 a is connected to the circumferential edge of the column portion 21 and also functions as a sidewall of the column portion 21.

  On the other hand, of the panel side wall portion 26, a pair of lateral side wall portions 26b that are positioned at both ends in the bottle axis O direction and extend in the circumferential direction are arranged inwardly (center portion) in the bottle axis O direction from the radially inner side toward the radially outer side. ) From the outside (upper and lower end portions), that is, an inclined surface that inclines in a direction in which the lateral side wall portions 26b are separated from each other.

The column part 21 is located between the vertical side wall parts 26a in the panel part 20 adjacent in the circumferential direction, and is extended continuously along the bottle axis O direction. Since the vertical side wall portion 26a is inclined as described above, the shape of the column portion 21 orthogonal to the bottle axis O is small in the circumferential direction from the radially inner side to the radially outer side. It becomes the trapezoid shape.
In addition, the top surface 21a located on the radially outer side in the column portion 21 is formed in, for example, a curved surface that protrudes in an arc shape radially outward along the circumferential direction, and also serves as the outer circumferential surface of the trunk portion 4. However, the shape of the top surface 21a is not limited to the curved shape of the protrusion bulging outward in the radial direction, and for example, it may be formed as a flat curved surface or a curved surface of the protrusion radially inward.

As for the column part 21, the lateral width along the circumferential direction is changing not along the bottle axis | shaft O direction but the fixed width. Specifically, the horizontal width of the column portion 21 is such that the horizontal width W1 at the central portion of the body portion 4, that is, the minimum diameter position of the body portion 4 (the position at which the body portion 4 is most contracted) is the other position of the body portion 4. It is formed wider than the lateral width W2.
In the illustrated example, the column portion 21 is not suddenly enlarged at the central portion of the body portion 4, but is formed so that the top surface 21a gradually becomes wider from the outside toward the inside in the bottle axis O direction. Yes. Thereby, the vertical side wall part 26a in the panel side wall part 26 is continuously extended along the bottle axis | shaft O direction, without dividing | segmenting along the bottle axis | shaft O direction, for example in the middle.
Moreover, in the illustrated example, the panel bottom wall portion 25 is formed so that the lateral width along the circumferential direction becomes narrower at the center portion of the body portion 4 in the bottle axis O direction, corresponding to the lateral width of the column portion 21. Yes.

In the body portion 4, third concave grooves 30 that are recessed inward in the radial direction are continuously provided over the entire circumference in the portion where the pair of side wall portions 26 b in the panel side wall portion 26 are formed. Is formed.
In addition, a recessed portion 31 that is further recessed toward the inside in the radial direction is formed in the central portion of the panel bottom wall portion 25. In the illustrated example, the recess 31 is formed to extend along the bottle axis O direction. However, the recess 31 is not essential and may not be provided. Further, instead of the concave portion 31, for example, a convex portion that swells radially outward may be formed.

(Bottle action)
The operation of the bottle 1 configured as described above will be described.
First, since the plurality of panel portions 20 are formed in the body portion 4, for example, when the inside of the bottle 1 is in a reduced pressure state, the connection portion between the panel bottom wall portion 25 and the panel side wall portion 26 is the center, The panel bottom wall portion 25 is displaced inward in the radial direction. In other words, by preferentially deforming the panel portion 20 at the time of depressurization, the internal pressure change (decompression) of the bottle 1 can be absorbed while suppressing deformation at other parts (for example, the column portion 21 and the shoulder portion 3). it can.

Next, when the contents are poured out, the body part 4 has a constricted shape in which the central part in the bottle axis O direction has the smallest diameter, so that the body part 4 having excellent grip can be obtained. It is easy to easily perform squeeze deformation while firmly holding 4. In particular, since the body 4 is cylindrical, it can be easily fitted to the hand and can exhibit high grip.
Therefore, even if the contents having viscosity are filled in the bottle 1, the contents can be smoothly poured out by utilizing the squeeze deformation of the body portion 4.

In addition, the column portion 21 formed in the body portion 4 has a width in the circumferential direction that is the widest width W1 at the minimum diameter position of the body portion 4. Usually, when the body part 4 is squeezed and deformed, the stress acting on the body part 4 tends to act on the minimum diameter part of the body part 4, so that the amount of deformation in the minimum diameter part tends to be large.
In this embodiment, since the lateral width of the column portion 21 is formed to be the widest at the minimum diameter position of the body portion 4, it is easy to disperse the radially inward compressive force applied to the column portion 21 during squeeze deformation. ing. Therefore, at the time of squeeze deformation, the column portion 21 can be prevented from being bent radially inward while the column portion 21 is deformed along with the deformation of the body portion 4. For this reason, for example, squeeze deformation can be appropriately repeated, and the contents can be poured out to the end.

Furthermore, since the vertical side wall part 26a in the panel part 20 is continuously extended along the bottle axis O direction, a part (stress concentration part) that becomes a starting point of bending when the squeeze deformation of the body part 4 is formed. 26a can be excluded. Therefore, it is possible to further prevent the column portion 21 from being bent.
Further, since the column portion 21 is formed to be the widest at the minimum diameter position of the body portion 4 having a constricted shape, a portion having a low rigidity of the body portion 4 can be supplemented by the rigidity of the column portion 21.

  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.

The synthetic resin material forming the bottle 1 may be appropriately changed, for example, polyethylene terephthalate, polyethylene naphthalate, amorphous polyester, or a blend material thereof.
Further, the bottle 1 is not limited to a single layer structure, and may be a laminated structure having an intermediate layer. Examples of the intermediate layer include a layer made of a resin material having a gas barrier property, a layer made of a recycled material, or a layer made of a resin material having an oxygen absorption property.

  Moreover, in the said embodiment, although the 1st ditch | groove 10, the 2nd ditch | groove 15, and the 3rd ditch | groove 30 were formed, the number and position of these ditch | grooves may be designed freely and it does not need to have. I do not care. Moreover, the shape of the panel part 20 is not limited to the said embodiment, For example, you may change suitably according to the kind of content, filling conditions, etc.

O ... Bottle shaft 1 ... Bottle 4 ... Body part 20 ... Panel part 21 ... Column part 25 ... Panel bottom wall part 26 ... Panel side wall part 26a ... Vertical side wall part

Claims (1)

A plurality of panel portions that are recessed inward in the radial direction are formed in the body portion having a circular shape in cross section in the circumferential direction at intervals in the circumferential direction, and a column portion is formed between the panel portions adjacent in the circumferential direction. A bottle,
The body portion gradually decreases in diameter from the outside toward the inside along the bottle axial direction,
The column portion continuously extends along the bottle axial direction, and the lateral width along the circumferential direction is formed wider than the lateral width at other positions of the barrel portion at the position where the diameter of the barrel portion is most reduced. And
The panel portion includes a panel bottom wall portion located radially inward from the outer peripheral surface of the body portion, and a panel side wall portion extending radially outward from an outer peripheral edge of the panel bottom wall portion,
The panel bottom wall portion has a width in the circumferential direction corresponding to the width of the column portion, so that the width of the barrel portion is narrower than the width of the barrel portion at a position where the diameter of the barrel portion is reduced most. Formed,
Of the panel side wall portion, the vertical side wall portion connected to the column portion continuously extends along the bottle axial direction,
The panel portion and the column portion are alternately arranged in the circumferential direction ,
In the body portion, a concave groove recessed inward in the radial direction is formed on the entire periphery of a portion of the panel side wall portion where lateral wall portions extending in the circumferential direction are formed at both ends in the bottle axial direction. A bottle characterized by being continuously formed .

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