KR102012723B1

KR102012723B1 - Plastic bottle

Info

Publication number: KR102012723B1
Application number: KR1020147002290A
Authority: KR
Inventors: 요시야스 무라타
Original assignee: 라이온 가부시키가이샤
Priority date: 2011-11-28
Filing date: 2012-11-26
Publication date: 2019-08-21
Also published as: SG11201402379WA; JP6034556B2; WO2013080926A1; JP2013112361A; KR20140097101A

Abstract

The present invention improves the appearance at the time of label application while suppressing the change of the content of the injecting water in the thin plastic bottle filling the fluid content. The main trunk portion 4 is formed in the main trunk portion 4 so as to extend in a straight line as seen from the outside of the bottle, and is parallel to the groove 11 along the rib 11 and a groove-shaped rib 11 that circumscribes the main trunk portion 4. A plurality of dimples 12 formed in (4), each of the dimples 12 is formed in the width direction of the rib 11 to be wider than the groove width of the rib 11 to the width direction both sides of the rib 11 It protrudes and is formed deeper than the groove depth of the rib 11 in the depth direction of the rib 11.

Description

Plastic Bottle {PLASTIC BOTTLE}

TECHNICAL FIELD The present invention relates to a thin plastic bottle filled with fluid contents such as liquid, and more particularly, to a plastic bottle that is thin, lightweight, secures rigidity, and also improves appearance.

This application claims priority in November 28, 2011 based on the patent application 2011-258925 for which it applied to Japan, and uses the content for this specification.

Conventionally, a stretched polyethylene terephthalate bottle called a PET bottle, or a thin plastic bottle made of polyethylene or polypropylene (hereinafter, simply referred to as a "bottle") may contain liquid contents such as shampoo, rinse, and detergent. It is frequently used as a container for filling. These bottles may be deformed irretrievably by receiving various external forces during storage or transportation of the empty bottles after molding, transportation or storage of products after filling or after filling, storage and point display, and use in the consumer.

In particular, the thinner the outer circumferential wall of the main body body portion, the more the amount of plastic used decreases to obtain various effects, but the problem remains in terms of strength rigidity. Thus, the outer circumferential wall of the body of the bottle is partially bent to form ribs of a groove shape (hereinafter sometimes referred to as a "groove shape") which revolves around the body body part, and the deformation of the bottle is made by the rigidity of the rib. Suppression is done. For example, in Patent Literature 1, by forming a corrugated rib around the main body of the bottle on the outer circumferential wall, the swelling of the main body body is suppressed as compared with the case where the horizontal rib is formed on the outer circumferential wall, thereby causing The effect of suppressing changes in the amount of content when the contents are filled up without deforming the bottle is enhanced.

Japanese Patent Laid-Open No. 9-240647

However, in the structure of the said patent document 1, although the effect which suppresses the change of content amount of manchuria is high compared with the case where a horizontal rib is provided in the outer peripheral wall of a main body trunk part, when a label is stuck on the outer peripheral surface of a main body trunk part, a label largely waves There is room for improvement in terms of appearance because it becomes a beating appearance.

This invention is made | formed in view of the said situation, and it aims at improving the external appearance at the time of label sticking, suppressing the change of content of manju in a thin plastic bottle filled with fluid content.

A first aspect of the present invention as a solution to the above problem is a thin plastic bottle filled with a fluid content, the body of the normal body extending along one direction and the outer circumferential wall of the main body trunk portion seen from the outside of the bottle A groove-shaped rib which is formed to extend upward and circumscribes the main body portion, and a plurality of recesses (hereinafter sometimes referred to as "dimples") formed on the outer circumferential wall of the main body body portion to be parallel to the ribs; And each recess is formed to be wider than the groove width of the rib in the width direction of the rib, protrudes to both sides in the width direction of the rib, and is formed deeper than the groove depth of the rib in the depth direction of the rib. It is done.

According to a second aspect of the present invention, in the first aspect, the rib is formed in a plurality of side by side in the extending direction of the main body portion, characterized in that the plurality of recesses are formed in each of the plurality of ribs.

In the third side of the present invention, in the first side or the second side, the width in the width direction of the rib in the recess and the depth in the depth direction of the rib are respectively the groove width of the rib and It is characterized by being set in the range of 1.2-1.8 times the groove depth.

A fourth aspect of the present invention is the aspect of any one of the first side to the third side, wherein each of the concave portions is circular in front and is hemispherical concave.

A fifth aspect of the present invention is the aspect of any one of the first to fourth aspects, wherein the front center of the concave portion is located on the centerline of the corresponding rib.

(Effects of the Invention)

According to the first aspect of the present invention, by providing a plurality of concave portions that are wider and deeper than the entire width of the straight ribs, each concave portion is reinforced to suppress expansion (development) or contraction in the width direction of the ribs. Rib rigidity against expansion or contraction can be increased. For this reason, the rigidity of the main body trunk with respect to the force from the bottle inner side when filling a bottle with fluid content, and the force from the bottle outer side when holding a bottle becomes high, and the amount of manchu Content by which a main body trunk swells Change and buckling deformation of the main body trunk can be suppressed. In addition, by appropriately limiting the width and depth of each concave portion and maintaining the shape of the rib viewed from the outside of the bottle in a straight line, even when the label is affixed to the outer circumferential surface of the main body, it is difficult to obtain the appearance that the label is largely wavy. Compared with the case where the wave rib is formed in the part, the change in the amount of filling in the bottle can be suppressed, and the appearance of the bottle at the time of label sticking can be improved to improve the commercial property.

According to the 2nd side surface of this invention, rigidity can be ensured over the whole extension direction (axial direction) and the circumferential direction of a main-body trunk | drum.

According to the third aspect of the present invention, by suppressing the width and depth of each concave portion within a predetermined magnification with respect to the groove width and groove depth of the rib, the shape of the rib viewed from the outside of the bottle is kept in a straight line, The appearance of the bottle can be improved.

According to the fourth aspect of the present invention, expansion and contraction in the width direction of the corresponding rib can be effectively suppressed.

According to the fifth aspect of the present invention, it is possible to limit the protrusion of the concave portion biased to one side in the width direction of the corresponding rib.

1 is a front view of a plastic bottle in an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along AA of FIG. 1.
3 is a cross-sectional view taken along line BB of FIG. 1.
4 is an enlarged view of a portion C of FIG. 1.
5 is a sectional view taken along line DD of FIG. 4.
6 is a cross-sectional view taken along line EE of FIG. 4.
It is a top view of the principal part of the state which developed the outer peripheral wall of the main body trunk | drum of the said plastic bottle in planar view.
8 is a front view corresponding to FIG. 1 showing a modification of the plastic bottle.
9 is a front view corresponding to FIG. 1 showing another modified example of the plastic bottle.
Fig. 10 is an enlarged view corresponding to Fig. 4 showing a modification of the ribs and dimples of the plastic bottle.
FIG. 11 is a cross-sectional view taken along line FF of FIG. 10.
12 is a cross-sectional view taken along line GG of FIG. 10.
FIG. 13 is an enlarged view corresponding to FIG. 4 showing another modified example of the rib and the dimple of the plastic bottle. FIG.
14 is a sectional view taken along the line HH of FIG. 13.
FIG. 15 is a cross-sectional view II of FIG. 14.
16 is a plan view corresponding to a part of FIG. 7 showing a modification of the relative arrangement of the ribs and dimples.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described with reference to drawings.

The plastic bottle (hereinafter, simply referred to as a bottle) 1 of the present embodiment shown in FIG. 1 is the mouth portion 2, the shoulder 3, the main body body 4, and the body portion 4 in order from the top in the upright state shown in the drawing. The bottom part 5 is integrally formed by blow molding or the like. The bottle 1 is a thin plastic bottle of about 430 ml of filling content (when filling the contents without deforming the bottle 1), and can be used as a refilling container such as shampoo, rinse or medical detergent. .

The mouth part 2 is a cylindrical housing for pouring the contents of the bottle 1, and the cap installation screw 2a is formed in the outer peripheral surface.

The shoulder 3 extends gradually from the base of the mouth part 2 toward the outer circumferential direction and downward, forming a convex curved image outwardly of the bottle. The lower end of the shoulder 3 is connected to the upper end of the upper maximum outer shape 4a of the main body body 4. In addition, reference numeral 3a in FIG. 3 denotes a ridge line along the lower end of the shoulder 3 and the upper end of the upper maximum outer contour 4a.

With reference to FIG. 2, the main body 4 has an elliptical cross-section that is long left and right and extends up and down. The main body 4 has a cross section of an elliptical cross-section having a substantially constant cross-sectional shape with a label sticking portion 4b extending upward and downward and an upper small stepped portion 4d above the label sticking portion 4b. The cross-sectional shape is enlarged to 0.5 mm to 1.0 mm through the upper maximum outer portion 4a and the lower portion step 4e below the label sticking portion 4b. It has a connected lower maximum outer portion 4c. The outer circumferential wall 6 of the label sticking portion 4b forms an outer circumferential surface 7 extending straight up and down so that product labels such as a shrink label can be attached (see FIG. 5). In addition, the code | symbol CO shows a bottle center axis line in the extending direction (up-down direction) of the main body trunk | drum 4 in FIG.

Referring to FIG. 3 together, the bottom portion 5 is a pair of left and right corners on the front side and a pair of left and right corners on the rear side as the bottom portion 5 is directed downward from the upper portion connected to the lower end of the lower maximum outer portion 4c of the main body portion 4. By projecting the portion 5a, it gradually changes into a rectangular cross-sectional shape that is long and rounded to the left and right. Although the bottom part 5 and the main body trunk | drum 4 are about the same left and right width X0, the front-back width Y1 of the lower part of the bottom part 5 is more preferable than the front-back width Y0 of the main body trunk | drum 4 5 to 6 mm large, more preferably 5.2 to 5.8 mm large, most preferably 5.6 mm large. The lower end of the bottom part 5 is folded in an arc shape from the outer peripheral side toward the inner peripheral side to form the ground edge 5b, and then the curved bottom surface 5c convex upward on the inner peripheral side of the ground edge 5b. Form.

The material of the bottle 1 is plastic, such as polyethylene terephthalate (PET), low density polyethylene (LDPE), high density polyethylene (HDPE), polypropylene (PP), polyvinyl chloride (PVC), and the elasticity modulus (Young's modulus) is 500 Mpa- The range of 3500 MPa is preferable.

The bottle 1 is a thin plastic bottle in which the ratio represented by the resin content / manchurian content (g / ml) exceeds about 0.030 to about 0.015, and the thickness of the outer circumferential wall 6 of the body trunk portion 4 is 0.1 to 0.2. The range of mm (average thickness of the whole bottle is 0.1-0.3 mm) is preferable.

As a measuring method of average thickness, a molded product sample is created, and it divides into the inside of the nozzle part 2, the trunk | drum 6, and the raised bottom 5a, and calculates a volume. The surface area is obtained from the shape data modeled by the computer-aided design tool (called CAD), and the average thickness of each area is obtained by dividing the volume available from the molded product sample. The volume of is obtained by dividing the volume of the whole bottle by CAD.

In the plastic bottle of the present invention, the height H0 from the ground edge 5b of the bottle 1 to the upper end of the spout 2 is, for example, 180 to 200 mm, preferably 185 to 195 mm. It is most preferable that it is about 190 mm, and the left and right widths (left and right width | variety (X0) of upper maximum outer part 4a, lower maximum outer part 4c, and bottom part 5) are 60-75 mm and 65-70 mm. Preferably, about 68 mm is most preferable, the front and rear width (front and rear width Y1 of the bottom part 5) is 50 to 60 mm, preferably 54 to 58 mm, most preferably about 56 mm, and the bottle 1 The upper and lower width H1 from the upper end of the mouthpiece 2 to the upper end of the label sticking portion 4b is 40 to 60 mm, preferably 45 to 55 mm, most preferably about 50 mm, and the label sticking portion 4b. ), The upper and lower widths H2 are 70 to 90 mm, preferably 75 to 85 mm, most preferably about 80 mm, and the ground edge from the lower end of the label sticking portion 4b. The upper and lower widths H3 to (5b) are 50 to 70 mm, preferably 55 to 65 mm, and most preferably about 60 mm.

Specifically, in the embodiment of FIG. 1, the height H0 from the ground edge 5b of the bottle 1 to the upper end of the spout 2 is about 190 mm, the left and right widths (uppermost outer portion 4a, The left and right widths X0 of the lower maximum outline part 4c and the bottom part 5 are about 68 mm, the front and rear width (front and rear width Y1 of the bottom part 5) is about 56 mm, and the mouth part 2 of the bottle 1 ) The upper and lower width H1 from the upper end to the upper end of the label sticking portion 4b is about 50 mm, and the upper and lower width H2 of the label attaching portion 4b is about 80 mm, and the ground edge 5b is lowered from the lower end of the label sticking portion 4b. The lower end width H3 is preferably about 60 mm.

With reference to FIGS. 1 and 5, the outer circumferential wall 6 of the label sticking portion 4b has an annular rib 11 that circulates the label sticking portion 4b in parallel with the plane (horizontal plane) where the ground edge 5b is in contact. It is formed up and down side by side at intervals such as a plurality of stages.

Although the "plurality" of the said rib 11 here is not specifically limited in number, It is preferable that it is 3 or more and 10 or less, and it is preferable that it is 4 or more and 9 or less. It is most preferable that it is five.

The rib 11 is a cross section orthogonal to the circumferential direction (hereinafter referred to as the bottle circumferential direction) of the label sticking portion 4b by bending and bending the outer circumferential wall 6 of the label sticking portion 4b partially into the bottle inward. Is formed into a groove shape (groove shape) having a semicircular cross-sectional shape convex toward the bottle inward. In addition, the code | symbol C1 in the figure shows the center line of the width direction of the rib 11 on the outer peripheral surface 7 cut | disconnected by the rib 11.

The groove width (up and down width) H4 of the rib 11 is, for example, 1.5 to 4.5 mm, preferably 2 to 4 mm, most preferably about 3 mm, and the groove depth Y4 is 0.5 to 2.0. mm, preferably 0.8-1.7 mm, most preferably about 1.2 mm. The distance H6 (the pitch between the adjacent ribs 11, see FIG. 7) between the groove width center lines C1 of the adjacent ribs 11 is 8-20 mm, for example, It is preferable that it is 9-16 mm, Most preferably, about 15 mm. Further, the distance between the upper end of the label sticking portion 4b and the groove width center line C1 of the uppermost rib 11 and between the lower end of the label sticking portion 4b and the groove width centerline C1 of the lowermost rib 11. The distance is, for example, 8 to 11 mm, preferably 8.5 to 10.5 mm, and most preferably about 9.5 mm, for example.

Specifically, in the embodiment of FIG. 1, the groove width (up and down width) H4 of the rib 11 is, for example, about 3 mm, and the groove depth Y4 is preferably about 1.2 mm. It is preferable that the distance H6 (the pitch between adjacent ribs 11, see FIG. 7) between the groove width center lines C1 of the adjacent ribs 11 is about 15 mm. Further, the distance between the upper end of the label sticking portion 4b and the groove width center line C1 of the uppermost rib 11 and between the lower end of the label sticking portion 4b and the groove width centerline C1 of the lowermost rib 11. Preferably, the distance is about 9.5 mm.

A plurality of dimples (concave portions) 12 are formed on the ribs 11 along the ribs 11 on the outer circumferential wall 6 of the label sticking portion 4b, respectively.

With reference to FIGS. 4-7, the dimple 12 is circular with a radius of 1.5-4.0 mm in the front view (time normal direction of the outer peripheral surface 7 of the main body part 4) shown, for example in FIGS. It is preferable that it is circular with a radius of 1.75-3.75 mm, and it is most preferable that it is circular with a radius of about 2.5 mm. Moreover, it is preferable that it is hemispherical concave shape whose depth from the outer peripheral surface 7 to the innermost part to a bottle inner side is 0.6-3.0 mm, and hemispherical concave shape which is 1.0-2.7 mm, and is about 1.5 mm hemispherical concave shape. Is most preferred.

Specifically, in the embodiments of FIGS. 4 to 7, the dimple 12 is preferably a circular shape having a radius of about 2.5 mm in the front view (in the normal direction of the outer circumferential surface 7 of the main body portion 4). Moreover, it is preferable that it is hemispherical concave shape whose depth from the outer peripheral surface 7 to the innermost part to a bottle inner side is about 1.5 mm.

That is, the dimple 12 is about 2 to 8 mm corresponding to the diameter H, which is wider than the width H5 of the groove width H4 of the rib 11 in the width direction with respect to the corresponding rib 11. And a depth Y5 of about 1.2 to 1.8 times the groove width H4 and a depth Y5 of about 0.5 to 2.0 mm deeper than the groove depth Y4 of the rib 11 in the depth direction of the corresponding rib 11. It is preferably formed to have a diameter of about 3.6 mm and about 1.2 to 1.8 times the groove depth Y4.

Specifically, in the embodiment of FIGS. 4 to 7, the dimple 12 has a width H5 wider than the corresponding rib 11 in the width direction of the groove width H4 of the rib 11 in the width direction thereof. A depth Y5 of about 5 mm corresponding to the phosphorus diameter and about 1.7 times the groove width H4 and deeper than the groove depth Y4 of the rib 11 in the depth direction of the corresponding rib 11 by about 1.2 mm. It is preferably formed to have about 1.5 mm and about 1.3 times the groove depth Y4.

In the front view of the dimple 12, its center position (front view center) C2 is on the groove width center line C1 of the corresponding rib 11. Therefore, the dimple 12 protrudes evenly up and down (both in the width direction) of the rib 11 corresponding to the front face.

The dimple 12 traverses this to partially notch the inner circumferential surface of the corresponding rib 11, thereby suppressing the expansion (development) and contraction in the width direction of the rib 11. In other words, the dimple 12 functions as a short rib which reinforces it by crossing and crossing the corresponding rib 11.

Thereby, even if the rib 11 expands or shortens the width | variety in the width direction by the influence of the internal pressure of the bottle 1, the influence of the holding force, etc. on the bottle 1, each rib 11 ) Is reinforced by the plurality of dimples 12 as described above, so that the expansion and contraction of each rib 11 and the label sticking portion 4b can be suppressed.

The dimple 12 is in front of the bottle (when the normal direction of the outer circumferential surface 7 of the body body 4) on the convenience of the appearance when the product label is affixed to the outer circumferential surface 7 of the label attaching portion 4b. Various dimensions are appropriately limited such that the ribs 11 are kept in a straight line shape from a distance of 50 cm or more from the outside of the bottle along the line. Specifically, the width H5 in the width direction of the rib 11 in the dimple 12 is preferably within a range of 1.2 to 1.8 times the groove width H4 of the rib 11. Similarly, the depth Y5 in the depth direction of the rib 11 in the dimple 12 is preferably within a range of 1.2 to 1.8 times the groove depth Y4 of the rib 11.

In addition, the pitch H6 between the ribs 11 adjacent to the upper and lower sides is set to be 8 mm to 20 mm, preferably 9 mm to 16 mm so that the dimples 12 of the ribs 11 adjacent to the upper and lower sides do not pass.

Each rib 11 may be 12 to 24 in the longitudinal direction (bottle circumferential direction), preferably 16 to 24, most preferably 16, and the number of dimples 12 is arranged. At this time, the pitch S1 between the front center C2 of the dimples 12 adjacent to the bottle circumferential direction is 7 to 15 mm in this embodiment, preferably 7 to 11 mm, and the ribs adjacent to the top and bottom ( The dimple 12 of 11) is shifted by half of the pitch S1 in the bottle circumferential direction, and is arrange | positioned. In other words, the dimples 12 are arranged in a zigzag pattern with respect to the vertical direction.

Here, the bottle 1 of this embodiment, the base shape bottle which removed the rib 11 and the dimple 12 from the bottle 1, the horizontal rib bottle which removed only the dimple 12 from the bottle 1, and a bottle After removing the ribs 11 and the dimples 12 from the corrugated rib bottle in which the corrugated ribs are formed on the label sticking portion 4b, the stiffness, the restoring force, the label wrinkles, and Table 1 shows the results of evaluating the "constant amount change". In addition, "Example" of Table 1 shows the bottle 1, "Base" shows the said base shape bottle, "Horizontal rib" shows the said horizontal rib bottle, and "Wave shape rib" shows the said wave rib bottle, respectively. In addition, "(circle)" of each column of Table 1 represents a pass, and "x" represents a rejection, respectively.

The above-mentioned "stiffness" is a state in which each bottle is filled with a specified amount of solution, and the pressure is reduced by performing a vacuum from the inlet, respectively, and the respective bottles are in a state of deteriorating the appearance (deformation of the auxiliary opening). Judgment is made with the magnitude of the loss in time.

In addition, the said "stiffness" is that each bottle is laid so that its main body is horizontally placed on the test table, the upper center of the main body of the body is pressed from above by an attachment with a load cell, the pressure input when the main body body is displaced by a predetermined amount Determined by the magnitude of (reaction).

The above "restoring force" is to place each bottle on the test table with its main body to be horizontal, press the upper center of the main body of the body from above from the attachment with the load cell, create a buckling deformation in the body of the body, and then attach the attachment before pressing It determines with the restoration situation of the said deformation | transformation at the time of returning to a position.

The "label wrinkle" is determined to be good or bad in appearance including wrinkles generated in the shrink label after the shrink label is attached to the main body and heated to close the shrink label.

In the above-mentioned "filling amount change", the weight of each bottle which was submerged in a water tank and filled with water, and the weight of each bottle loaded on the bottom surface and filled with water by the normal filling method were respectively measured, and the weight of the contents was measured from these measured values. The amount of contents of each bottle filled with water in the electronic state without the influence of the back, and the amount of contents of each bottle filled with the water in the latter state with the influence of the weight of the contents, etc. Judgment is made with the magnitude of the difference in the amount of manchurian content in the latter state.

From the evaluation result shown in Table 1, the bottle 1 of this embodiment is superior to each comparative example also in any one item of "stiffness", a "restoration force", a "label wrinkle", and "a change in the amount of pouring." okay.

Subsequently, in each case where the number of the dimples 12 is 24, 20, 16, or 12 for each of the ribs 11 in the bottle 1 of the present embodiment, the displacement amount of the body trunk portion 4 Evaluation was made based on the change of reaction force with respect to, and the good or bad of the external appearance at the time of label sticking.

As a result, when the number of the dimples 12 per rib 11 is 16 or more, the reaction force with respect to the displacement amount of the main body 4 is secured almost equally, whereas the number of the dimples 12 per rib 11 is 12 In the individual case, it was found that the reaction force with respect to the displacement amount of the main body trunk portion 4 decreased.

On the other hand, when the dimples 12 adjacent to each other in the bottle circumferential direction come into contact with each other and fuse together, the ribs become substantially wider and the label wrinkles become more prominent. Therefore, the number of the dimples 12 for each rib 11 is 12 to 24. It is preferable that it is less than or equal to. In the bottle 1, it is preferable that the number of the dimples 12 for every rib 11 is 12-20 or less, and 16 is the most preferable. At this time, the pitch S1 between the front view centers C2 of the dimples 12 adjacent to the bottle circumferential direction for each rib 11 is 10 to 12 mm.

As explained above, the bottle 1 in the said embodiment is a thin plastic bottle which fills a fluid content, The normal main-body body part 4 extended along one direction, and the said main-body body part 4 The main body trunk is formed on the outer circumferential wall (6) of the c) so as to extend in a straight line as seen from the outside of the bottle, and parallel to the grooved ribs (11) which circumscribe the main body portion (4), along the ribs (11). A plurality of dimples 12 formed on the outer circumferential wall 6 of the portion 4, wherein each of the dimples 12 has a groove width H4 of the rib 11 in the width direction of the rib 11; It is formed wider and protrudes to both sides in the width direction of the rib 11, and is formed deeper than the groove depth (Y4) of the rib 11 in the depth direction of the rib (11).

In addition, the "fluid content" referred to herein is not particularly limited as long as it is a liquid substance, and may be a liquid substance having fluidity as a whole even if the solid component is partially, and in the present invention, a liquid such as shampoo, rinse, detergent, etc. may be used. It is preferable that it is a substance.

According to this configuration, a plurality of dimples 12 (concave) having a wider and deeper rib than the entire width of the straight ribs 11 are provided so that each dimple 12 expands in the width direction of the ribs 11 ( Reinforcement to suppress expansion) and contraction, thereby increasing the rigidity of the rib 11 against the expansion and contraction. For this reason, the rigidity of the main body trunk | drum 4 with respect to the force from the inside of a bottle at the time of filling the bottle 1 with a fluid content, and the force from the bottle outside when holding the bottle 1 improves. This can suppress changes in the amount of scouring content due to expansion of the main body trunk portion 4, buckling deformation of the main body trunk portion 4, and the like.

Moreover, even when the label is affixed on the outer circumferential surface 7 of the main body body 4 by restricting the width and depth of each dimple 12 appropriately and maintaining the shape of the rib 11 viewed from the outside of the bottle in a straight line. It is hard to become the appearance which this label waved greatly, and after suppressing the change of the amount of content of filling in the bottle 1 compared with the case where the corrugated rib 11 was formed in the main body trunk part 4, the bottle at the time of label pasting The external appearance of (1) can be improved and a commercial property can be improved.

In addition, the bottle 1 has a plurality of ribs 11 are formed side by side in the extending direction of the main body portion 4 to form the plurality of dimples 12 of the plurality of ribs 11, respectively, Stiffness can be ensured over the entire growth direction (axial direction) and the circumferential direction of the trunk portion 4.

The bottle 1 has a width H5 in the width direction of the rib 11 and a depth Y5 in the depth direction of the rib 11 in the dimples 12, respectively. By setting it in the range of 1.2 to 1.8 times the groove width H4 and the groove depth Y4 of (11), the shape of the rib 11 viewed from the outside of the bottle is kept linear and the bottle 1 at the time of label sticking. The appearance can be improved.

In addition, since the dimples 12 are circular and hemispherical concave in front, the bottle 1 can effectively suppress the expansion and contraction in the width direction of the corresponding rib 11, and the angle The front center center C2 of the dimple 12 is located on the groove width center line C1 of the corresponding rib 11 so that the protrusion of the dimple 12 biased to one side in the width direction of the corresponding rib 11 is prevented. You can limit it.

In addition, this invention is not limited to the said embodiment, For example, the structure which the dimple 12 arrange | positioned along the up-down direction may be arrange | positioned like the bottle 1 'shown in FIG.

Here, as shown in FIG. 1, the bottle 1 in which the dimples 12 are arranged in a zigzag direction with respect to the vertical direction, and the bottle 1 'in which the dimples 12 are arranged in the vertical direction as shown in FIG. Evaluation of "stiffness" and "restoration force" in Fig. 1) showed that there was no significant difference.

In addition, like the bottle 1 "shown in FIG. 9, the rib 11 may incline with respect to the ground edge 5b (horizontal surface), and may circumscribe the label sticking part 4b. In FIG. (11) shows the structure which continues to form a spiral. The inclination rib and the horizontal rib may be combined suitably, and several rib may be parallel or it may cross, but it is preferable that it is parallel.

In addition, the ribs and the concave portions formed in the label sticking portion 4b are also various, for example, trapezoids convex into the bottle at a cross section orthogonal to the bottle circumferential direction, such as the ribs 11 'shown in Figs. A cross-sectional shape may be used, or a triangular cross-sectional shape convex into the bottle may be formed in a cross section orthogonal to the bottle circumferential direction as in the rib 11 ″ shown in FIGS. 13 to 15.

Further, a pyramid (or truncated cone) that is worn inside the bottle, such as the recessed portion 12 'shown in FIGS. 10 to 12, or a recessed pyramid inside the bottle, such as the recessed portion 12 "shown in FIGS. (Or cone) may be used.

In addition, the front view shape of the concave portion 12 may be a variety of polygons including a triangle or a square, or may be a free shape such as a flower or an animal in addition to the geometric shape, but is a continuous curved shape without folding. Is preferably. As a continuous curved shape without folding, it is more preferable that it is a shape, such as a circle, an ellipse, a track ellipse (Rounded Rectangle).

In addition, the groove width, the vertical pitch, and the like of the ribs 11 may be equally changed, or may be appropriately changed. Similarly, the size, the circumferential pitch, and the like of the recesses 12 may be equally or appropriately changed, respectively.

In addition, as shown in FIG. 16, the front view center C2 may be arrange | positioned with respect to the groove width center line C1 of the corresponding rib 11 in the front view of the recessed part 12. FIG. However, it is set as the difference of the range which the recessed part 12 protrudes in the width direction both sides of the corresponding rib 11.

The rib 11 may not necessarily be continuous in the bottle circumferential direction (may be cut in the figure). The number and formation positions of the ribs 11 are appropriately set according to the design, the purpose of use, the container capacity, and the like.

And the structure in the said embodiment is an example of this invention, and various changes are possible in the range which does not deviate from the summary of the said invention.

It is applicable to the field of the plastic bottle of the refill container, such as a shampoo, a rinse, a medical detergent.

1, 1 ', 1 ": plastic bottle 4: body
6: outer wall 11, 11 ', 11 ": rib
H4: Groove Width Y4: Groove Depth
C1: groove width center line (center line) 12: dimple (concave)
12 ', 12 ": recess H5: width
Y5: depth C2: center of front view

Claims

In the thin plastic bottle which fills a fluid content,
A normal body body portion having an elliptical cross-sectional shape extending in one direction,
A groove-shaped rib formed on the outer circumferential wall of the body body portion so as to extend in a straight line as seen from the outside of the bottle, and circumscribing the body body portion;
A plurality of recesses formed on an outer circumferential wall of the main body portion so as to be parallel to the ribs;
Each of the recesses is formed in the curved portion of the outer circumferential wall, and is formed wider than the groove width of the rib in the width direction of the rib to form a front view circle projecting to both sides in the width direction of the rib, and further, the depth of the rib. And a hemispherical concave shape formed deeper than the groove depth of the rib in the direction.

The method of claim 1,
The rib is formed in a plurality of side by side in the extending direction of the body portion, the plastic bottle, characterized in that the plurality of recesses are formed in each of the plurality of ribs.

The method of claim 1,
The width | variety in the width direction of the said rib in each said recessed part, and the depth in the depth direction of the said rib are set in the range of 1.2-1.8 times of the groove width and the groove depth of the said rib, respectively. .

The method of claim 1,
A plastic bottle, characterized in that the front center of the concave portion is located on the centerline of the corresponding rib.

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