JP2007197042A - Vertically contracting pet bottle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make the vertical width (height) of a PET bottle practically smaller than that when no content fills the main body of the bottle. <P>SOLUTION: This vertically contracting PET bottle is made of a flexible resin material such as PET resin. The bottle is provided with a main body whose side face circumference is formed in bellows horizontally or slantingly excluding either the center part or low part and/or upper part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention mainly uses a preform to produce a plastic bottle of juice or mineral water using a blow molding method generally called a stretch blow, an index blow, or a pet resin blow. In particular, the present invention relates to a plastic bottle that can expand and contract in the vertical direction with different heights when the contents are filled and when it is empty.

The production amount of synthetic resin bottles has become enormous in recent years.

However, when drinking and drinking bottled juice and mineral water and discarding the plastic bottle body, it is a bottle with the shape before it was drunk. Has the biggest disadvantage of being abandoned on the streets and deteriorating the living environment. In addition, the cost of collecting the drunk PET bottle itself and the labor cost for cleaning are a major burden on public works. .

  This type of synthetic resin bottle can be manufactured by simple means such as blow molding, but it is still strong enough to withstand vibration during automobiles and other transport means that are subject to severe vibrations, as well as in stores that are stacked. Some were not enough.

  Furthermore, this means that the PET bottle body is bulky when it is transported from a manufacturer that manufactures PET bottles to a company that fills juice or mineral water, or when it is transported to a waste disposal site. In such a state, the ratio of the product transportation cost was considerable.

Therefore, the present inventor previously provided a liquid plastic bottle devised so that the plastic bottle can be easily reduced when collecting the waste plastic bottle.

This is because the peripheral wall of the liquid plastic bottle body made of a relatively soft synthetic resin and having a mouth portion at the upper end has a bellows shape. (See Patent Document 1)

In addition to this, by applying a load in the vertical direction and / or torsional direction of the PET bottle main body, the volume is substantially reduced, and the means for holding the reduced shape and the pet The invention of the bottle body (see Patent Document 2) was proposed.

As a result, all of the above-mentioned purposes, that is, the height of the plastic bottle body when it was crushed and the size of the plastic bottle can be further reduced to keep the state. Such a bottle that can be expanded and contracted in the height direction is convenient for transporting a large amount at one time by shrinking from the molding factory to the content filling factory, and dramatically increases the capacity in the trash bin after drinking and drinking. There is an advantage that the absolute amount to be improved and conveyed to the processing plant can be increased as much as possible.

However, not only this, but when drinking contents such as juice lying on the beach, for example, it is convenient if the vertical axis of the plastic bottle itself can be bent, and while drinking In the case of quitting, if it is possible to reduce only the part that has been drunk, unlike the case where the height capacity could not be changed in the past, it can be easily accommodated in a handbag or the like.

At first glance, these bottles seem to have been solved by making their external shape bellows-like, but they are actually relatively thin synthetic resin materials that are recently "inexpensive" and relatively strong materials. In some so-called pet resins, repeated expansion and contraction operations result in the original state without breaking, tearing, scratching, or shrinking, particularly the peaks and valleys constituting the bellows. As a result of the resilience to try, it was even said that it was impossible to make a bellows-like plastic bottle with a so-called plastic bottle resin.

JP2001-213418 (abstract) JP2002-68156 (Abstract)

In general, the object of the present invention is to provide a method for producing a PET bottle that can be expanded and contracted in the vertical direction so that its vertical width (height) can be substantially reduced as compared to when the contents are filled in the PET bottle body. There is to do.

Another purpose is to reduce the height (volume) when transporting from this plastic bottle body factory to a factory filled with mineral water or juice. The purpose of the present invention is to provide a plastic bottle that can extend and contract in the vertical direction with respect to the plastic bottle body.

Another purpose is to easily reduce the volume (height) of the plastic bottle body even when an infant or the elderly easily discards the plastic bottle body after drinking and drinking juice or mineral water in the plastic bottle body. An object of the present invention is to provide a plastic bottle that can be expanded and contracted in the vertical direction and that has sufficient strength to fill liquids.

Another object of the present invention is to provide a plastic bottle that can easily extend and contract in the longitudinal direction in a shape that does not slide down even if condensation occurs on the surface of the plastic bottle body, Another object of the present invention is to make it possible to reduce the vertical width of an empty portion while drinking the contents of the PET bottle body.

Another object of the present invention is that conventional empty PET bottles that have been drunk up are thrown away as they are in the vertical width (height) state, and the trash bin is full and can no longer be accommodated. This is an increase in the number of items that can be accommodated compared to conventional products. This means that a large amount of empty plastic bottles can be transported at the same time. The cost can be reduced.

In addition, such a PET bottle body is suitable for manufacturing a large amount at a low cost, and the formation of the bellows portion and each ridge constituting each bellows is ensured. As a result, when the PET bottle body is crushed, the plastic bottle body is crushed. It was possible to provide a plastic bottle that can extend and contract in the vertical direction so that it can be kept in the wet state.

  Thus, the feature of the present invention is that it has a bellows shape in a horizontal direction or an oblique direction except for the central part of the PET bottle body or the upper and / or lower part except for the vertical width of the drinking mouth part at the upper end part. It is.

Another feature of the present invention is that the vertical cross-sectional shape of each ridge forming the bellows shape in the above PET bottle main body is curved downward on both the upper surface and the lower surface.

  As another feature, the vertical cross-sectional shape of the uppermost ridge of each of the ridges forming the bellows shape is such that the upper surface is curved upward and the lower surface is straight or upwardly curved, and the ridges after the second tier are curved. The vertical cross-sectional shape is that both the upper surface and the lower surface are curved downward.

In addition, in this case, one of the features is that an annular depression is provided by projecting the valley portion constituting the bellows shape further in the axial direction of the PET bottle body.

Thus, in the present plastic bottle main body, after drinking and squeezing the contents such as juice, the plastic bottle main body is crushed in the vertical direction. It was possible to increase the amount given.

Further, in the present invention, a part of the outer periphery of the plastic bottle main body is not a bellows shape but a flat cylindrical shape. That is, when the plastic bottle body of the present invention is crushed, a force in the vertical direction of the bottle body is required. However, in the actual case, the force in the vertical direction is not always correct, and any horizontal force is applied. For this reason, there exists a possibility that a bottle main body may be in the state distorted in the horizontal direction.

In this regard, in the present invention, by providing the flat cylindrical portion, even if an attempt is made to deform the bottle body by applying a horizontal force to the tentative vertical force, this cylindrical portion exerts a force to correct this, so the bottle works. The body was able to reduce its height correctly and vertically.

Moreover, since the PET bottle of the present invention is provided with a portion having a bellows-like outer periphery, the portion is easy to hold and there is no risk of slipping and dropping even if so-called condensation occurs on the outer surface when the contents are drunk. It is.

In addition, as an effect of the present invention, when a blank portion is formed in the main body of the PET bottle by an operation such as in the middle of drinking the contents, the height is substantially smaller and lower than the height when the contents are filled. It is to be able to be in a state.

  As a result, even if a so-called “leftover” occurs in this plastic bottle, it can be carried in a bag such as a handbag. Since it is thrown away into a trash can after being reduced in height, the trash can no longer fills up as in the past, and transportation and collection operations that carry air are dramatically improved.

In addition, as an effect of the invention of these specific structures, the force to crush the PET bottle main body is transmitted to the upper surface of the bellows-like portion, and since the upper surface is linear, it is natural that the force is less than the curved shape of the lower surface. A long and crushed upper surface has its inner end pressed above the annular recess. As a result, the center position of such an annular recess rotates (moves) downward, which acts as an action force that easily superimposes the upper and lower surfaces of each bellows. The PET bottle main body of the present invention was able to be folded very easily even with a relatively small force such as an elderly person.

And the thing which provided the bay-like hollow in the valley part of the ridge which constitutes the above-mentioned bellows-like shape further increases the action of the above-mentioned annular depression, and it is a little when the plastic bottle body of the present invention is expanded and contracted accordingly. By force, the bellows-like portions surely overlap each other, and the height of the plastic bottle body can be reduced to about 1/3 to 1/8.

  The present invention has other excellent objects, features, and effects, which will be clarified in the description of the following examples.

In other words, in FIG. 1, (1) is a plastic bottle body, the outer periphery thereof is except the drinking mouth part (3) at the upper end, and the central part remains cylindrical (2) and the other is bellows (4). Yes.

Thus, in FIGS. 5 and 6, the plastic bottle body (1) is crushed from one or both in the height (length) direction when it is not yet filled with mineral water, or after drinking. The state was shown.

In other words, the present invention has an excellent configuration for bringing such a PET bottle body (1) into a crushed state and maintaining the crushed state, and exhibits an excellent action.

As an example of the configuration of the plastic bottle body (1), as can be seen in FIG. 1 (500 milliliter plastic bottle), (3) is a drinking mouth part of the plastic bottle body (1) with external threads engraved on its outer periphery. Immediately below that is a step having a gradient of 46 mm to 48 mm in diameter, and then connected to the upper portion of the bellows-like shape (4) of the first step (uppermost step). Thus, the outer diameter (4A) of the first-stage bellows-like ridge is 65 mmφ, which is smaller than the maximum bellows-like outer diameter (4N) 71 mmφ of the plastic bottle body (1).

In this case, the outer diameter (4B) of the second step bellows-like ridge is larger than the outer diameter (4A) of the second step bellows-like ridge, and the PET bottle is larger than the outer diameter (4A) of the first step accordion-like ridge. 68mmφ smaller than the maximum outer diameter (4N) of the main body (1).

Subsequently, in the embodiment shown in FIG. 1, the vertical cylindrical (2) portion that is not the bellows shape having the same diameter as the maximum outer diameter (4N) is connected to the second stage ridge. About 4 pieces are formed.
Thus, in this embodiment, the cylindrical portion (2) which is flat in the vertical direction as described above is in the center of the plastic bottle body (1). It may be above the bottle body or below as shown in FIG.

Next, each saddle constituting each bellows shape (4) has a shape like an unidentified flying object (UFO) called an Adamski type, and thus seems to be divided into two vertically in the horizontal direction. It has become a shape.

At this time, the height of the upper half height (h1) of the first step bellows-like outer diameter (4A) in FIG. 1 is 7.2 mm, and the height of the lower half height (h2) is 5.5 mm. The height (h3) of the upper half of the bellows-shaped outer diameter (4B) below the second step is 8.5 mm, the height (h4) of the lower half is 6.5 mm, and the width is changed. Yes.

As shown in FIG. 3, the shape of the first stage of the bottle is such that the upper surface is curved outward, whereas the lower surface is straight or the PET bottle body (1) is downward. It is gently curved (R40 in the figure). Thus, this portion of the plastic bottle main body (1), which is particularly likely to catch the eye of the consumer, is plunged into the shoulder of the plastic bottle main body (1). This is to improve the appearance as a curved shape.

Moreover, when crushing this plastic bottle main body (1), if the upper surface of the ridge of the 1st step is made into a curved shape, the force which pushed the drinking mouth part (3) or the shoulder part of the plastic bottle main body (1) will be By bending the upper surface of the ridge (5) upward, it is concentrated at the tip of the bending portion (the outer peripheral end of the first stage ridge (5)). Subsequently, the concentration force (F1) of the component force (f1, f2) on the outer periphery of the flange (5) is such that the lower surface of the first-stage flange (5) is folded inward, so that the second-stage The middle part of the upper surface will be pushed.

Thus, when the outer diameter of the first stage and the second stage are the same, this force is added and the crushing force is added to make it difficult to crush sequentially. The force of the outer ridge (5) consisting of the same intermediate portion is urged by this force and transmitted to the outer periphery of the second-stage ridge (5). Can be crushed.

In this case, it is also important that the thickness of the valley (P) of the ridge (5) constituting the bellows (4) is made thicker in comparison with the thickness of the mountain (Q). As a specific example, the thickness of the valley (P) is 0.49 mm, the thickness of the peak (P) is 0.27 mm, the valley (P) and the peak (Q). The thickness of the substantially intermediate portion is preferably 0.39 mm, and can be easily crushed in the vertical direction.

Further, as seen in FIG. 3 and the like, it was found that it is easier to crush when an annular recess (R) is provided by projecting in the axial direction of the plastic bottle body (1) from the valley (P). In this case, it has also been found that the diameter of the recess (R) is 0.5 to 3.0 mm, especially 1.0 mm in the plastic bottle body (1) of FIG.

In carrying out the present invention, various shapes of the ridge (5) are conceivable. As an example, the second and lower ridges (5) in FIG. 3 have a cross-section “>” in which both the upper surface (6) and the lower surface (7) are curved downward. Thus, in this shape, the force that crushes the plastic bottle body (1) from above is applied to the outer peripheral portion of the bottle (5), and even if it is a relatively small force that reliably pushes down this portion. The force to crush is added, and the power to crush is promoted.

In addition, this shape is such that the upper surface (6) and the lower surface (7) are curved downward when the plastic bottle body (1), which is used to drink and drink contents such as juice, is tilted or inverted. Suitable for spilling everything quickly.

Furthermore, this kind of plastic bottle body (1) must be sufficiently sterilized with washing water or the like when filling the contents such as juice. There is no possibility that a portion where the cleaning liquid does not hit or a cleaning liquid remains in the plastic bottle main body (1).

Note that the shape of the ridge (5) in FIG. 3 is such that the valley (P) is provided with a recess (R) in the central direction of the plastic bottle body (1) as described above. Thus, when folded in the vertical direction, the bulkiness of the valley portion that is most difficult to fold is eliminated, and the shape can be crushed relatively easily.

Further, as shown in the figure, this plastic bottle body (1) is different from the shape of the first stage and the second stage of the bottle (5) as described above. FIGS. 5 and 6 show the state in which the juice in the main body (1) is drunk up and crushed from the top and bottom with the palms of both hands.

That is, in FIG. 3 described above, the force (f1) for crushing the plastic bottle body (1) is directed from the valley to the next valley. At that time, a force also acts in the direction of the horizontal component force (f2), which pushes the entire plastic bottle (1) diagonally through the ridge (5), and as a result, the plastic bottle (1) is distorted. It is.

However, the plastic bottle main body (1) of this embodiment has a cylindrical portion (2) having no wrinkles at the center thereof, and this cylindrical portion (2) is crushed even when the plastic bottle (1) is pushed. Therefore, the plastic bottle (1) is prevented from distorting or correcting, and as shown in FIG. 6, the bottle (5) is folded in an orderly manner in the cylindrical part (2). A folded and folded fold can remain in that state.

It should be noted that this is naturally easy to fold even when a cylindrical (2) portion having no wrinkles is provided above or below the PET bottle main body (1) as shown in FIGS.

In carrying out the present invention, the shape of the ridge (5) is various, such as the cross-sectional shape of the upper surface (6) forming the ridge (5) is curved downward and the shape of the lower surface (7) is also curved downward. Can be considered.

Therefore, when crushing the plastic bottle body (1) of the bottle (5) whose upper and lower surfaces (6) and (7) are curved downward, the upper and lower surfaces (6) and (7) of the bottle (5) Since both are curved downward, even a relatively hard resin material such as pet resin can be easily folded.

Further, as a device for more easily crushing the plastic bottle body (1) of the embodiment of the present invention, the thickness of the drinking mouth part (3) is 1 as the cross-sectional shape of the shoulder part of the plastic bottle body (1). .740 mm, and the thickness between this and the portion of the bellows-shaped (4) that reaches the middle of the top surface is 0.797 mm, and in comparison with this, the first peak portion (Q ) Is 0.194 mm, the thickness of the peak (Q) is 0.137 mm in this embodiment, and the thickness of the intermediate part from this peak (Q) to the valley (P) is 0 It is good to model so as to be as thin as 191 mm respectively.

By doing in this way, the upper surface (6) of the first step bellows-like shape (4) is thicker than the others from the drinking mouth (3) to the middle, and compared with this. Since the second and lower stages are thinner, the soft body is crushed with just a hard disk-like shape, and a large force is not required for the crushing operation, and the outer diameter of the first stage ( 4A) is smaller than the outer diameter (4B) of the second stage as described above, so that each bellows (2) portion of the bottle body (1) is folded in order, so that it is easy for both infants and the elderly The bulk (height) can be reduced.

  In this embodiment, as described above, the diameter of the ridge of the shoulder portion of the plastic bottle main body (1) becomes larger as it goes downward, and as a result, each crushed ridge has its outer periphery with respect to the inner periphery. Then, it is put on the cylindrical (2) portion without wrinkles while being superimposed on the upper slope.

  As a result, the height (volume) of the PET bottle main body (1) becomes 1/2 to 1/3 or less in repeated experiments, and even if it is discarded in a trash can, the space can be remarkably reduced. It was.

  In addition, since the products that are usually on the market as drinking PET bottles are 500 milliliters, they are rarely “drinked” at once.

Therefore, you must carry a plastic bottle that has an empty part with the volume remaining unchanged.

In that respect, the plastic bottle body (1) of the present invention can be easily carried even in a handbag because the empty portion after being drunk is shrunk so that it can be carried.

  Further, the PET bottles used for many beverage PET bottles are provided with a flat posted portion indicating the trademark or description of the content or the origin, in the middle of the PET bottle body (1). In (1), since the intermediate portion is formed in a cylindrical shape (2) having no wrinkles, the same effects as described above are obtained.

  The main effect of the plastic bottle main body (1) described above is that the volume of the plastic bottle main body can be reduced when the plastic bottle main body is discarded, and the number that can be accommodated in the trash can is increased. That is.

  In addition, since the reduced PET bottle main body can achieve a large amount of conveyance at the same time, the recovery cost and the labor cost for cleaning and recovery can be greatly reduced.

  Furthermore, the plastic bottle main body of the present invention has a good appearance, which has given great interest to the user, and the shape of the bellows of the plastic bottle main body serves as a friction stopper, and the plastic bottle main body slips during use. The possibility of dropping or overflowing contents can also be prevented.

  Further, it is known that the shape of the plastic bottle body crushed according to the present invention is good in design and can be used as it is as an outside plastic bottle.

  In general, the effect of the present invention is that all or part of the longitudinal direction is the horizontal direction except for the mouth portion at the upper end, the width in the small height direction at the bottom, and the width in the mouth portion and the height direction. When the plastic bottle body is drained and discarded, the volume of the plastic bottle body is reduced by simple operation and little force, even for infants and the elderly. This is to make it possible to easily produce large quantities of plastic bottles.

Front view of the entire plastic bottle body of the present invention Longitudinal illustration The cross-sectional enlarged view of the 1st stage collar part which comprises a bellows shape Enlarged view of the buttocks below the second stage Front view of the plastic bottle body crushed Longitudinal illustration Cross-sectional enlarged view showing another shape of plastic bottle body The cross-sectional enlarged view showing the PET bottle main body of the shape of another Example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Plastic bottle 2 Tubular shape 3 Drinking mouth part 4 Bellows shape 5 襞 6 Upper surface 7 Lower surface 8 Indentation 4A Outer diameter 4B of the first step bellows-like ridge 4N Outer diameter 4N of the second step bellows-like ridge Maximum outer diameter h1, h3 Upper half height h2, h4 Lower half height f1, f2 Component force F1 Concentration force P Valley part Q Mountain part

Claims (4)

It is made of a flexible resin material such as PET resin, and has a plastic bottle body that has a horizontal or diagonal bellows around the side surface except for either the central part or the lower and / or upper part. PET bottles that can be stretched vertically In the plastic bottle main body shown in claim 1, the vertical cross-sectional shape of the uppermost one of the ridges forming the bellows shape is such that the upper surface is curved upward and the lower surface is curved straight or upward. And the vertical cross-sectional shape of the bottle after the second stage is a PET bottle that can be expanded and contracted in the vertical direction, characterized in that both the upper surface and the lower surface are curved downward The plastic bottle main body according to claim 1, wherein the plastic bottle body is made of a flexible resin material such as a pet resin, has a drinking mouth portion at the upper end, and has a lateral or oblique bellows around the side surface. The vertical cross-sectional shape of each ridge that forms a bellows-like shape is a plastic bottle that can be expanded and contracted in the vertical direction, characterized in that its upper surface and lower surface are curved downward A plastic bottle capable of expanding and contracting in the vertical direction characterized in that an annular recess is provided by projecting the valley portion constituting the bellows shape shown in claims 1 to 3 further in the axial direction of the PET bottle body.

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