JP3866034B2 - Volume-reducing plastic bottle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plastic bottle capable of volume reduction.
[0002]
[Prior art]
In recent years, disposal of plastic waste has become a social problem, and used plastic bottles are also being recycled.
For this reason, various types of plastic bottles that can be easily crushed have been proposed in the past. For example, volume reduction bottles as described in JP-A-11-342948 are also known.
[0003]
[Problems to be solved by the invention]
In the bottle described in the above publication, a plurality of parallelograms are continuously arranged in the top and bottom and the circumferential direction on the surface of the body of the bottle, and correspond to each side of the quadrilateral. The valley crease forming part is formed so as to correspond to the diagonal line.
And the convex rib (4) is provided in the mountain crease formation part, and the concave rib (5) is provided in the valley crease formation part.
[0004]
However, in blow molding, it is difficult to accurately form each of the large number of convex ribs (4) and concave ribs (5) arranged in the vertical and horizontal directions. In the case of the rib (5), since the deformation of the rib becomes large, there has been a problem that even when folded, the original deformation cannot be restored even if the plastic deformation is caused beyond the elastic limit.
[0005]
An object of the present invention is to solve the above problems, and the bottle body surface has a helical bellows shape in which hexagonal bi-fold panels are arranged so as to extend spirally in the vertical and circumferential directions, and the volume is reduced. An object is to provide a plastic bottle that can be restored.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is a bottle having a mouth portion and a shoulder portion, a trunk portion and a bottom portion as a volume-reducible plastic bottle, and the trunk portion is composed of two upper and lower panel surfaces. The bi-fold panel is formed as a bi-fold panel row arranged in parallel with a twist angle in the vertical direction, and a plurality of the panel rows are arranged in the circumferential direction so that each panel surface is continuous, and a helical bellows-like body peripheral wall is formed. characterized in that there, folio panels consecutively provided a hexagonal diagonal line valley line, the long sides parallel with the mountain line, as a connection line the short sides an inclined line, common to the mountain lines and the inclined lines A configuration characterized by the above is adopted.
[0007]
In particular, as a bottle whose volume can be easily restored, a configuration is adopted in which the folding surface of the two-fold panel is a twisted surface between the upper and lower sides of the valley line of the panel.
[0008]
As a specific embodiment, the body is composed of four rows of folded panels in the circumferential direction, and a tetrahedral twisted body circumferential wall is formed. The body has six rows in the circumferential direction. The structure is characterized by the fact that it consists of a double-folded panel row and a hexahedron twisted body wall is formed, and the body part is composed of a double-folded panel row of 3 rows in the circumferential direction, forming a trihedral twisted body wall It is possible to adopt a configuration characterized in that
[0009]
Also, as the shape of the bi-fold panel, two isosceles trapezoids that are equal to each other, and a hexagonal flat panel that is symmetrically juxtaposed with a common base, the long side parallel to the longer diagonal along a certain spiral angle. A flat panel is formed by arranging a flat panel on a line having a twist angle perpendicular to the spiral angle and forming a panel row in parallel, and the flat panel is diagonally cut from the original shape in which the plane formed by the plurality of panel rows is a cylinder. A configuration characterized by being formed by bending a long side parallel to a line as a mountain line is adopted.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, a first embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, A is a bottle blow-molded using PET, PP, or other synthetic resin, and includes a mouth 1 and a shoulder 2, a body 3 and a bottom 4.
[0011]
A screw 5 is screwed on the outer periphery of the mouth portion 1, and a neck ring 6 is provided below the screw 5.
The shoulder 2 has a rectangular shape with a chamfered corner and continues to the body 3.
The trunk portion 3 has a connecting portion 7 following the shoulder portion 2 and a plurality of double-folded panel rows arranged in parallel in the vertical direction with a twist angle, and a double-folded panel P continuous in the circumferential direction is spirally formed. It consists of arranged helical bellows-like body peripheral walls 8 and connecting recesses 9 that follow the bottom 4.
[0012]
As shown in FIG. 2, the folded panel P is formed by bending a hexagonal plane having vertices a, b, c, d, e, and f along a diagonal line ad. bc, line segment ef is mountain line 11, and line segments ab, cd, de, fa are inclined lines 12. The two upper and lower panel surfaces have a constant folding angle α, and the upper and lower panel surfaces are twisted by shifting the angular position of the folding angle α above and below the valley line 10. Yes.
[0013]
Here, the shape of the bi-fold panel P will be described in detail.
As shown in FIG. 3, the bi-fold panel P is a hexagon in which two identical isosceles trapezoids are symmetrically arranged in parallel with the bases in common, and a pair of equal sides such as parallel long sides BoCo and long sides EoFo. A hexagonal flat panel Po composed of a long short side AoBo, a short side AoFo, a short side CoDo, and a short side DoEo, a diagonal line AoDo of the long side and a long side BoCo of the next flat panel Po, a helical angle θ A rectangular plane is formed by four plane panel rows PL arranged in a continuous manner on the line and parallel to the direction of the helix angle line orthogonal to the spiral angle θ, and the plane is a cylinder. It is formed as a prototype.
[0014]
In the present embodiment, the spiral angle θ is 45 °, and the diagonal BoAoFo and the diagonal CoDoEo opposing each other on the hexagonal diagonal are 90 °.
In forming the bi-fold panel P, as shown in FIG. 4, the diagonal line AoDo of the flat panel Po is a fold line, the long side BoCo and the long sides Eo, Fo are mountain lines, A two-fold panel P1 is formed from two quadrilaterals composed of inclined lines.
[0015]
As the folding angle α further decreases, the spiral angle θ decreases.
The flat panel Po was on the cylindrical surface, and by bending, the valley line AoDo on the circumferential surface of the cylinder became a straight line, and the helical angle θ also decreased, so that a compressive force acts on the valley line AoDo, and the valley line A repulsive force is generated inside AoDo.
[0016]
The repulsive force of the valley line of the upper adjacent bi-fold panel P11, P12 acts on the upper mountain line BoCo of the bi-fold panel P1, and the lower bi-fold panel P13, Po is applied to the lower mountain line EoFo. The repulsive force of P14 acts.
Therefore, when the force acting on the upper peak line end point Co on the bi-fold panel P1 is compared with the force acting on the lower peak line end point Eo, the upper half-fold panel P12 of the bi-fold panel P1 is compared with the valley line AoDo of the bi-fold panel P1. The tip of the valley line is in a position that spirally recedes from the end of the valley line of the lower folded panel P14, and the inclination angle with respect to the valley line AoDo is smaller for the valley line of the folded panel P14. Yes.
The small inclination angle means that the component force with respect to the valley line AoDo becomes large, and the force acting on the point Eo is larger than the force acting on the point Co.
[0017]
Further, when comparing the upper folded panel P11 and the lower folded panel P13, the valley line of the folded panel P11 is inclined with respect to the valley line AoDo of the folded panel P from the valley line of the folded panel P13. The angle is getting smaller.
That is, the force acting on the Bo point is greater than the force acting on the Fo point.
Accordingly, the upper and lower surfaces of the bi-fold panel P1 are twisted by the repulsive force of the valley lines of the adjacent upper, lower, left and right bi-fold panels P11, P12, P13, and P14, and the folding angle α is the same in the front and rear. As shown in FIG. 4, a deviation occurs in the angular position.
[0018]
Then, by balancing the repulsive force of the valley lines of each panel, a bi-fold panel P having a fixed folding angle and having two upper and lower panel surfaces twisted above and below the valley line is formed. Maintained.
The trunk peripheral wall 8 is blow-molded so as to form the folded panel P in this state.
[0019]
As shown in FIG. 1, the connecting portion 7 includes a corner portion 7 a and a straight side portion 7 b following the shoulder portion 2.
A row of inclined lines 12 is connected to the corner portion 7a, and a row of mountain lines 11 and valley lines 10 is connected to the straight side portion 7b.
[0020]
The connection recess 9 converges the mountain line 11 and the inclined line 12 located on the outer side with the connection line 9a as the cut surface of the panel surface, and extends the central part of the valley line 10 located on the inner side from the connection line 9a to the valley part 9b. I try to converge.
The bottom 4 includes a bottom peripheral wall 20, a ground contact end wall 21, and a bottom wall, and radial reinforcing ribs are provided on the bottom wall as necessary.
[0021]
Next, volume reduction of the bottle A will be described.
As shown in FIG. 5, when the bottle A is pressed from above, the bi-fold panel P is further folded, the spiral angle θ is reduced, the twist of the panel row PL is reduced, and the bi-fold panel P is moved vertically. The panel is compressed and, at a certain limit, the upper and lower surfaces of the panel are reversed by a snap action so that a stable volume reduction state can be obtained.
[0022]
The volume-reducing action will be described in detail. When the folded panel P is folded, as shown in FIG. 6, the vertical compression force on the bottle A is the folding force p of the panel through the inclined line 12, and all the folded panels Will work equally to P.
Therefore, the folding force p is applied to the ridge line ends b and c of the folded panel P on average.
[0023]
Comparing the angle of the inclined line ab and the inclined line cd with respect to the valley line ad of the folded panel P, the angle bad <angle cda, and the folding moment applied to the point b is greater than the folding moment applied to the point c. At the peak line ends f and e on the side, the upper and lower panel surfaces are folded in a point-symmetric state, opposite to the upper side.
[0024]
Thus, the upper and lower panel surfaces of the folded panel P are deformed while being twisted above and below the valley line ad. However, when viewed in detail, the panel has six line segments ad, line segments bf, and line segments ce. When the angle abc formed by the slant line ab and the mountain line bc exceeds 180 °, the slant line ab and the mountain line bc are reversed by the snap action, and the six surfaces are shown in FIG. A state as shown in FIG.
[0025]
At that time, the valley line ad is also in a bent state because the compression force increases as the helical angle θ decreases.
Even if the compressive force in the vertical direction of the bottle is removed in this state, each surface of the divided panel is prevented from being reversed in the restoring direction by the snap action, so that the reduced volume is maintained.
[0026]
Next, when a pulling force is applied so as to extend the bottle from the stable volume reduction state, the inverted state of the panel can be released and the original state can be restored by the restoring force of the bi-fold panel P.
[0027]
Moreover, when compressive force is further applied in the vertical direction from the reduced volume stable state, the deformation progresses and the spiral angle becomes small and the twist of the panel row also becomes small, but if it is within the elastic limit, excluding the compressive force, The two-fold panel returns to a stable volume reduction state due to the restoring force.
However, when the compressive force is further increased, the spiral angle θ approaches 0, the compressive force is applied to the entire upper and lower panel surfaces of the bi-fold panel P, and the six divided surfaces work to be flat.
[0028]
When the crest line 11, the inclined line 12, and the trough line 10 of the folded panel are crushed so as to fold each other , the bent portion undergoes plastic deformation and is not restored even if the compression is released. Can be maintained, and can be used as a waste bottle as a crushing bottle after use.
The volume-reducing bottle can be discarded as it is after the bottle is used, but is restored when a tensile force is applied. Therefore, after the volume reduction, the cap is closed and discarded.
[0029]
Therefore, since the bottle of the present invention can be reduced in volume and restored, the transportation effect can be enhanced by transporting the bottle with the volume reduced.
Further, when the used bottle is discarded, it is easy to reduce the volume and crush the bottle, and the bottle can be made into a very small capacity.
[0030]
Next, the bottle of 2nd Embodiment is demonstrated.
The present embodiment relates to a hexahedral bottle.
As shown in FIG. 7, the bottle B includes a mouth part 30 and a shoulder part 31, a body part 32 and a bottom part 33, and the mouth part 30 is provided with a screw 34 and a neck ring 35.
The shoulder portion 31 has a circular cross section and continues to the body portion 32.
The trunk portion 32 includes a connection concave portion 36 that follows the shoulder portion 31, a trunk peripheral wall 37, and a connection concave portion 38 that is connected to the bottom portion 33.
[0031]
As shown in FIG. 9, the bi-fold panel Pa is formed by bending a hexagonal plane with vertices g, h, i, j, k, and l along a diagonal line gj. The line hi and the line kl are the mountain lines 41, the line segments gh, ij, jk, and lg are the inclined lines 42, the angle positions of the folding angles are shifted above and below the valley line 40, and the upper and lower surfaces are twisted. It has become.
[0032]
The shape of the folded panel Pa is the same as that of the first embodiment, and as shown in FIG. 8, hexagonal flat panels Pao are arranged on a line having a longer diagonal and a longer side as a spiral angle θa, and A rectangular plane is formed by using six flat panel rows PaL rows arranged in parallel in the direction of the twist angle line orthogonal to the spiral angle θa line, and a cylindrical shape of the plane surface is formed as a prototype.
[0033]
In the present embodiment, the spiral angle θa is 30 °, and the opposite angles on the hexagonal diagonal are 60 ° or 70 °.
[0034]
As shown in FIG. 9, the folded panel Pa is formed by forming a folded panel Pa1 with the diagonal line of the flat panel Pao as a trough line and the two parallel long sides as a mountain line 41. The panel Pa1 has a fixed folding α angle, like the bifold panel P1 of the above embodiment, and the upper and lower two pieces of the twisted state are shifted by shifting the angle position of the folding angle α above and below the valley line 40. It becomes a bifold panel which consists of a panel surface, and the trunk | drum circumferential wall 37 is blow-molded so that the bifold panel Pa of this state may be formed, and the stable state is maintained.
[0035]
The connection line 36a of the connection recess 36 with the trunk peripheral wall 37 converges the mountain line 41 and the inclined line 42 located on the outside as the cut surface of the panel surface of the trunk peripheral wall 37, and the valley 36b of the connection recess 36 The central part of the valley line 40 located at the center is converged.
[0036]
Similarly to the connection recess 36, the connection recess 38 converges the valley line 40, the mountain line 41, and the inclined line 42 of the bi-fold panel Pa from the connection line 38 a to the valley 38 b.
The bottom 33 includes a bottom peripheral wall 43, a grounding end wall 44, and a bottom wall, and radial reinforcing ribs are provided on the bottom wall as necessary.
[0037]
Next, bottle volume reduction will be described.
As shown in FIGS. 10 and 11, when an upper and lower compressive force is applied to the bottle B, the bottle B is deformed, and a reduced volume bottle can be obtained.
At that time, as in the first embodiment, the compressive force acts on the ridge line ends h and i of the bi-fold panel Pa, and the spiral angle θa is changed together with the folding deformation.
[0038]
As shown in FIG. 11, when the angles of the inclined line gh and the inclined line ij with respect to the valley line gj of the bi-fold panel Pa are compared, the angle hgj <angle ijg, and the folding moment acting on the h point acts on the i point. At the lower mountain line end kl, the upper and lower panel surfaces are folded in a point-symmetric state while being opposite to the upper side at the lower mountain line end kl.
[0039]
Thus, the deformation of the upper and lower panel surfaces of the bi-fold panel Pa proceeds while twisted above and below the valley line gj, but the panel surface is divided into six parts by line segment gj, line segment hl, and line segment ik. When the angle ghi formed by the inclined line 42 and the mountain line 41 exceeds 180 °, the inclined line gh and the mountain line hi are reversed by the snap action, and the six surfaces are shown in FIG. As shown in FIG.
[0040]
At that time, the valley line 40 is also in a bent state because the compression force is increased due to a decrease in the helical angle θa.
Even if the compressive force in the vertical direction of the bottle is removed in this state, each surface of the divided panel is prevented from being reversed in the restoring direction by the snap action, so that the reduced volume is maintained.
[0041]
Even if a compressive force is further applied from this state, it is restored to a stable volume reduction state when the compressive force is removed, but the original state is not restored unless a tensile force is further applied.
When a pulling force is applied so as to extend the bottle B from the stable volume reduction state, the inverted state of the panel is released, and the original state can be restored by the restoring force of the bi-fold panel Pa.
Therefore, since the bottle B of the present invention can be reduced in volume and restored in the same manner as the bottle A of the first embodiment, the transportation efficiency can be improved by transporting the bottle B with the volume reduced. it can.
[0042]
In addition, if the crest line 41, the slant line 42, and the trough line 40 of the bi-fold panel are crushed so as to fold each other , plastic deformation occurs in the bent part, and it will not be restored even if the compression is released. The crushed state can be maintained, and after use of the bottle, the crushed bottle can be used as it is as a waste bottle.
[0043]
Next, the bottle of 3rd Embodiment is demonstrated.
The present embodiment relates to a trihedral bottle. As shown in FIG. 12, the bi-fold panel Pb includes a parallel long side and a pair of isometric short sides to a hexagonal flat panel Pbo, followed by a diagonal line and The three flat panel rows in which the long sides of the flat plate Pbo are arranged so as to be continuous on the line having the spiral angle θb and the hexagonal flat panels are arranged in parallel in the direction of the twisted angle line orthogonal to the spiral angle θb. A square plane is formed with PbL, and the plane is a cylinder.
In the present embodiment, the spiral angle θb is 60 °, and the opposite angle on the hexagonal diagonal is 120 °.
[0044]
The two-fold panel Pb formed from this prototype has a fixed folding angle α on the upper and lower two panel surfaces, and the folding angle angle position is shifted above and below the valley line, so The panel surface is twisted.
[0045]
Along with the stable state at the time of molding, the panel surface is inverted by a snap action at a certain point during compression, and the volume reduction stable state can be maintained.
[0046]
In each of the above embodiments, the shape of the bi-fold panel is formed by bending the panel using a hexagonal flat panel as a prototype, but this is for explaining the shape of the bi-fold panel, and forming a bottle Sometimes, the blow mold may be created so that the folding surface of the bi-fold panel becomes a twisted surface between the upper and lower sides of the valley line of the bottle, and is not limited to the flat panel prototype.
Further, in each of the above embodiments, the length of the diagonal line of the hexagonal flat panel as the plane forming the cylinder, the diagonal line opposing on the diagonal line, the spiral angle, the number of panel rows, etc. are shown. It is not limited to.
[0047]
【The invention's effect】
Since this invention is comprised as mentioned above, there exists the following effect.
In the bottle of the present invention, the body peripheral wall is formed in a spiral bellows shape in which a plurality of folded panel rows are arranged in the circumferential direction, so that the volume reduction and crushing of the bottle can be performed very easily.
[0048]
And since the folding surface of the bi-fold panel is made to form a twisted surface between the upper and lower sides of the panel, the volume is reduced even when the panel surface is reversed by snap action and the compression force is removed. The state can be maintained.
Therefore, the bottle can be reduced in volume and transported, so that the transport efficiency can be increased.
[0049]
Since the waist wall is bellows-like, the bi-fold panel can be compressed until it is completely folded, and a waste bottle with a very small capacity can be obtained.
[Brief description of the drawings]
FIG. 1 is a perspective view of a bottle according to a first embodiment of the present invention.
2A and 2B are explanatory diagrams of a two-fold panel, in which FIG. 2A is an elevation view, FIG. 2B is a folding angle along the line AA in FIG. 1A, and FIG. 2C is a line BB in FIG. It is explanatory drawing of the folding angle | corner in.
FIG. 3 is a development view of a flat panel that is a prototype of a bi-fold panel.
FIG. 4 is an explanatory diagram of a two-fold panel.
FIG. 5 is a perspective view of a volume reduction bottle.
FIGS. 6A and 6B are explanatory diagrams of deformation of the two-fold panel at the time of volume reduction. FIG. 6A is an elevation view of the folding panel, and FIG. 6B is an elevation view of the folding panel at the time of volume reduction.
FIG. 7 is an elevation view of the bottle of the second embodiment.
FIG. 8 is a development view of a flat panel that is a prototype of a bi-fold panel.
FIG. 9 is an elevational view of a two-fold panel.
FIG. 10 is an elevational view of a volume reduction bottle.
FIGS. 11A and 11B are explanatory diagrams of deformation of a double-fold panel during volume reduction, where FIG. 11A is an elevation view of the double-fold panel, FIG. 11B is an explanatory view of a folding angle, and FIG. It is an elevation view of a panel.
FIG. 12 is a development view of a flat panel serving as a prototype of a bi-fold panel according to a third embodiment.
[Explanation of symbols]
A, B Bottles P, Pa, Pb Folded panels Po, Pao, Pbo Flat panels P1, P11, P12, P13, P14 Folded panels Pa1 Folded panels PL, PaL, PbL Panel rows θ, θa, θb Spiral angle 1 , 30 Mouth part 2, 31 Shoulder part 3, 32 Body part 4, 33 Bottom part 8, 37 Body peripheral wall 10, 40 Valley line 11, 41 Mountain line 12, 42 Inclined line

Claims (7)

A bottle consisting of a mouth and a shoulder, a torso and a bottom,
The body is a two-fold panel row in which the two-fold panel composed of two upper and lower panel surfaces is arranged in parallel with a twist angle in the vertical direction,
A volume-reducible plastic bottle characterized in that a plurality of panel rows are arranged in the circumferential direction so that each panel surface is continuous to form a helical bellows-like body peripheral wall .   The bi-fold panel is characterized in that a hexagonal diagonal line is a valley line, a parallel long side is a mountain line, a short side is an inclined line, and the mountain line and the inclined line are connected as a common connection line. The plastic bottle capable of volume reduction according to claim 1.   The volume-reducible plastic bottle according to claim 1 or 2, wherein a folding surface of the panel of the bi-fold panel is a twisted surface between the upper side and the lower side of the valley line of the panel.   The volume-reducible plastic bottle according to claim 1, wherein the body portion includes four rows of double-folded panel rows in the circumferential direction, and a tetrahedral twisted body circumferential wall is formed.   The volume-reducing plastic bottle according to claim 1, wherein the body portion is composed of six rows of double-folded panels in the circumferential direction, and a hexahedral twisted body wall is formed.   The volume-reducible plastic bottle according to claim 1, wherein the body portion includes three rows of two-fold panel rows in the circumferential direction, and a trihedral twisted body peripheral wall is formed.   A hexagonal flat panel in which two isosceles trapezoids with the same shape of the two-folded panels are symmetrically arranged in parallel with the base at the same side, and the long side parallel to the longer diagonal line along a certain spiral angle are continuous. The flat panel is formed on the line having a twist angle perpendicular to the spiral angle to form a panel row, and the flat panel is formed from the original shape in which the plane formed by the plurality of panel rows is a cylinder. The volume-reducible plastic bottle according to claim 1, wherein the plastic bottle is formed by bending long parallel sides as a mountain line.

Images