JP3115076U - PET bottles - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably and surely lock a cap by a very simple attaching / detaching operation without causing any adverse effect on the PET bottle.
[Solution]
In a plastic bottle comprising a cap locking portion that detachably locks a cap that is a lid of the PET bottle to an outer wall surface of the PET bottle, the cap locking portion is an annular shape protruding from the outer wall surface. The diameter of a circle or a partial circle formed by the side wall of the annular projection, or the width between the side walls of the two or more projections is in the vicinity of the outer wall surface. The cap diameter is equal to or larger than the outer diameter of the cap large-diameter portion near the mouth portion of the cap, and is smaller than the outer diameter of the cap large-diameter portion at a portion away from the outer wall surface. A plastic bottle characterized by
[Selection] Figure 1

Description

  The present invention relates to a plastic bottle including a cap locking portion to which a cap that is opened can be detachably attached.

  The majority of beverages such as juices, teas, sports drinks or mineral waters are sold in plastic bottles. Generally, the spout of a beverage plastic bottle is sealed by screwing a male thread formed on the outer surface of the spout and a female thread formed on the inner surface of the cap. The cap can be easily opened by screwing the cap around the plastic bottle without using an instrument such as the above. When the beverage in the plastic bottle is left untreated, the spout can be easily sealed again with the cap.

In such a plastic bottle structure, when the lid is opened, the cap completely detaches from the outlet of the plastic bottle, so that the beverage in the plastic bottle is drunk outdoors or in the opened state. While chatting or making a phone call, it is necessary to temporarily store the removed cap by holding it in your hand or putting it in your clothes pocket. In order to solve such a problem, several proposals have already been made to provide a cap bottle or a holder for holding the cap on the plastic bottle (for example, Patent Documents 1 to 5). reference).
JP 2000-238831 A JP 2001-072120 A JP 2003-237818 A JP 2004-115120 A Utility Model Registration No. 3070116

  Although the cap holders have different structures and shapes, most of them have a separate holding member different from the plastic bottle and the cap itself. The cap holders or holders disclosed in the above-mentioned Patent Documents 1 and 2 are connected in advance to the PET bottle with a connecting member so that the cap does not fall off from the PET bottle when the cap is opened. It is. However, this means that the cap must be connected to the PET bottle in advance so that the cap can be rotated, and there is a good aspect that the cap does not fall off when the cap is opened, but the cost increases. There are major drawbacks. In addition, it is usually required for soft drinks that a foreign substance such as a connecting member is attached to a plastic bottle, even though a plastic bottle that is drunk outdoors usually opens and closes two to three times at most. From the standpoint that simple plastic bottles are preferred, the product value will also be reduced. In addition, when handled by a vending machine, the cap holder is likely to cause trouble.

  Next, in the above-mentioned Patent Document 3, a cap holder formed by connecting a container mounting portion and a cap mounting portion with a connecting portion is attached to a plastic bottle with a label, and when the consumer needs it, The cap holder is removed from the PET bottle, the container mounting portion is attached to the spout of the PET bottle, and the cap is held by the cap mounting portion. However, this also increases the cost, but it is troublesome because two operations of removing the cap holder from the PET bottle and attaching it to the spout must be performed. In addition, although various examples are described in the above-mentioned Patent Document 4, in addition to those similar to the above-mentioned Patent Documents 1 to 3, the cap holder is a PET bottle using a heat-shrink label or a double-sided tape. It fixes to the outer wall surface of this, and what makes a cap holder hold | maintain on it is disclosed. This structure not only greatly increases the cost, but also has a problem with the structure of temporarily attaching the cap holder to the PET bottle, making it difficult to commercialize the cap holder. There are some things that must be removed once and then attached to the spout.

  Although the above-mentioned patent document 5 is going to solve the above-mentioned problems of forward tilted patent documents 1 to 4, it only shows an idea. That is, Patent Document 5 shows that a thin container wall of a plastic bottle is processed to form two protrusions, and a cap is temporarily held on the protrusion, but no mention is made of the specific structure. It ’s not just an idea. In beverage plastic bottles for which vending machines and the like are the object of distribution, the height of the protrusions must be 1/2 to 1/3 or less of the height of the cap. In addition to the possibility of breakage, there is a problem such as a problem of appearance and a decrease in product value. On the other hand, when holding the cap with a simple protrusion, the height of the protrusion should be about the same as the height of the cap, and the cap should be stable with the protrusion even if temporarily, unless the structure of the protrusion is devised. There are various problems such as being difficult to hold.

Therefore, in the present invention, in the PET bottle having a cap locking portion for removably locking the cap, which is a lid of the PET bottle, using the container wall of the PET bottle to solve these problems, Using the outer diameter of the cap mouth, etc. without causing any adverse effects on the PET bottle, the cap opened by the low protrusion or shallow recess is securely locked to the outer wall of the PET bottle with a simple attachment / detachment operation. In addition, the locked state can be stably maintained. Here, the meaning that the cap can be stably locked to the outer wall of the PET bottle not only means that the cap can be securely locked to the outer wall of the PET bottle, but most of the time when the cap needs to be locked. In this case, it is often the case that the plastic bottle is deformed somewhat due to the force applied to the plastic bottle. In such a case, the cap is difficult to come off from the outer wall of the plastic bottle. Say what you can hold.

  In order to solve the problems as described above, the first device is a plastic bottle including a cap locking portion that detachably locks a cap that is a lid of the plastic bottle on the outer wall surface of the plastic bottle. The cap locking portion includes an annular protrusion or two or more protrusions protruding from the outer wall surface, and a diameter of a circle or a partial circle formed by the side wall of the annular protrusion, or The width between the side wall portions of the two or more protrusions is equal to or larger than the outer diameter of the cap large-diameter portion located at the mouth of the cap in the vicinity of the outer wall surface, and from the outer wall surface. The pet is characterized in that it is smaller than the outer diameter of the large-diameter portion of the cap at the distant portion.

  In order to solve the problems as described above, the second device is a plastic bottle including a cap locking portion that detachably locks a cap that is a lid of the plastic bottle on the outer wall surface of the plastic bottle. The cap locking portion includes a side wall portion and a bottom wall portion in which a portion of the container wall of the PET bottle is recessed to form a recess, and the side wall portion has a protruding portion that forms a narrow portion of the recess. The diameter of the circle or partial circle formed at the protruding end of the protruding portion or the interval between the protruding ends of the protruding portion is larger than the outer diameter of the large-diameter portion of the cap located at the mouth of the cap. The PET bottle is characterized in that the base portion close to the bottom wall portion in the protruding portion is equal to or larger than the outer diameter of the large diameter portion of the cap.

  A third aspect of the present invention is the PET bottle according to the first aspect or the second aspect, wherein the side wall portion of the protrusion or the recess has an arc adapted to an outer circumference of the cap. I will provide a.

The fourth device is characterized in that, in any of the first device to the third device, the height of the protrusion or the depth of the recess is ½ or less of the height of the cap. Provide PET bottles.

  According to the first device and the second device, the cap that has been opened can be easily applied to the outer wall of the PET bottle using the outer diameter of the mouth of the cap without any adverse effect on the PET bottle. In addition to being able to be reliably locked by the attaching / detaching operation, the locked state can be stably maintained.

  According to the third device, in addition to the effects obtained by the first device and the second device, when the cap is locked at two locations, it can be reliably and stably locked. There is also an effect.

According to the fourth invention, the height of the protrusions constituting the cap locking portion and the depth of the recess are less than half of the cap of about 10 to 15 millimeters at most. The risk of damage will not increase, and the possibility of trouble with vending machines is extremely low.

[Embodiment 1]
A plastic bottle having a cap locking portion according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1A is an enlarged view of a stopper for a cap of a plastic bottle as viewed from above, FIG. 1B is a view as viewed from the front, and FIG. 1C is a view as viewed from the side. FIG. 2 is a view for explaining the relationship between the cap locking portion of the first embodiment formed on a plastic bottle and the cap. Usually, the mouth of the plastic bottle 1 is opened and closed by a cap 2 made of synthetic resin. Before describing the structure of the plastic bottle of the present invention, the cap 2 will be described. The plastic bottle cap 2 of the plastic bottle 1 is less than 1 millimeter in order to ensure mechanical strength and safety, but the mouth is thicker than the other parts. Many. The outer diameter of the mouth portion is larger than that of the other portion by the thickness.

  Here, a portion where the thickness of the mouth portion of the cap 2 is thick and the outer diameter is larger than the diameter of the other portion is referred to as a cap large-diameter portion 2A, and a portion having a smaller outer diameter than the cap large-diameter portion 2A. Is referred to as a cap outer diameter portion 2B. The cap large-diameter portion 2A has various shapes such as those that become thicker toward the tip of the mouth and those that are formed in a strip shape having a constant width and substantially the same thickness, all of which are effective for the present invention. The present invention uses such a unique structure of a cap of a PET bottle, and is characterized in that the PET bottle is provided with a cap locking portion 3 having a structure suitable for the structure. The cap outer diameter portion 2B occupies most of the cap, and many vertical grooves are often formed on the outer surface of the cap outer diameter portion 2B so that the cap 2 can be easily turned.

  As is well known, the PET bottle 1 is composed of a relatively thin wall of the container and is excellent in elasticity. In the present invention, the cap locking portion 3 that locks the cap 2 that is opened using the elasticity of the container wall of the PET bottle 1 to the outer wall surface of the PET bottle 1 and temporarily holds it stably is provided. In the first embodiment, the cap locking portion 3 is composed of two protrusions 4 and 5 that are integrally formed at the time of manufacturing the PET bottle 1 and is formed on a part of the outer wall surface 1A of the PET bottle 1, Become a part. Protrusions 4 and 5 have side walls adapted to the outer shape of cap 6. As shown in FIG. 1 (B), the protrusions 4 and 5 have arcuate side wall surfaces 4A and 5A adapted to a part of the circumference of the cap outer diameter portion 2B of the cap 2. The side wall surfaces 4A and 5A are preferably arcuate from the standpoint that the cap can be securely held, but may not necessarily be arcuate or linear.

  As shown in FIG. 2, the protrusions 4 and 5 of the cap locking part 3 serve as a part of the outer wall surface 1 </ b> A of the PET bottle 1, but the outer wall surface on which the protrusions 4 and 5 rise, that is, the protrusion 4. In the vicinity of the outer wall surface 1A ′ located between 1 and 5, a virtual circle having a diameter D that is approximately the same as or slightly larger than the diameter W1 of the cap large-diameter portion 2A is defined. Here, a partial arc on the virtual circle is referred to as a partial circle. Further, a narrow portion having the narrowest distance between the side wall surfaces 4A and 5A is formed at the midway portion of the side wall surfaces 4A and 5A away from the outer wall surface 1A ', that is, at the projecting end of the midway portion reaching the top of the protrusions 4 and 5. It has an arc shape, and its narrow portion is formed so as to draw a partial circle having a diameter d smaller than the diameter D. The diameter d is somewhat smaller than the diameter W1 of the cap large-diameter portion 2A and is the same as or somewhat larger than the diameter W2 of the cap outer-diameter portion 2B (W2 ≦ d <W1). That is, what is important in the first embodiment is that the narrow portions of the arcuate side wall surfaces 4A and 5A in the protrusions 4 and 5 are formed so as to draw a partial circle having a diameter d smaller than the diameter D, and the outer wall surface 1A. In the root portion in the vicinity, the side wall surfaces 4A and 5A form a partial circle having a diameter D that is approximately the same as or slightly larger than the diameter W1 of the cap large-diameter portion 2A.

  Since the container wall of the plastic bottle 1 is rich in elasticity, the narrow portion having the narrowest distance between the side wall surfaces 4A and 5A is also excellent in elasticity, and the protrusions 4 and 5 have such a structure. Therefore, as shown in FIG. 1, the cap 2 can be easily pushed between the protrusions 4 and 5 with a slight force. The cap 2 pushed between the projections 4 and 5 has a large-diameter portion 2A of the cap that fits into the large diameter D portion of the projections 4 and 5, and the side wall surface 4A in which the partial circles of the projections 4 and 5 have a small diameter. 5A, the cap 2 is securely and stably held by the protrusions 4 and 5. By making the protrusions 4 and 5 have such a structure, the height h of the protrusions 4 and 5 can be about 5 millimeters or less. Generally, since the height of the cap 2 is about 10 to 15 millimeters, it can be set to 1/2 to 1/3 or less with respect to the height H of the cap 2. If the height h of the protrusions 4 and 5 is about this level, no matter where the cap locking portion 3 is provided on the container wall of the PET bottle in view of the shape of the general PET bottle and the size of the unevenness thereof, It will not be damaged during the distribution process and will not cause trouble in vending machines. And since it has such a locking structure, even if a force is applied to the PET bottle 1 and the PET bottle 1 is slightly deformed in a state where the cap 2 is locked to the protrusions 4 and 5, the cap 2 Does not come off from the protrusions 4 and 5, and the locked state can be stably maintained.

[Embodiment 2]
A plastic bottle having a cap locking portion according to Embodiment 2 of the present invention will be described with reference to FIGS. 3A is a view showing a state in which the cap 2 is locked to the cap locking portion 3 of the plastic bottle 1, and FIG. 3B is a view showing a side surface of the plastic bottle in which the cap 2 is locked. is there. FIG. 4 is a view for explaining the relationship between the cap locking portion 3 and the cap 2 according to the second embodiment formed in a PET bottle. FIG. 5 is a view showing the shape of the cap locking portion viewed from the surface of the cap locking portion 3. 3 to 5, the same symbols used in FIGS. 1 and 2 indicate members having the same names.

  The cap locking portion 3 in the second embodiment includes a recess 10 formed so as to be recessed with respect to the outer wall surface 1 </ b> A of the plastic bottle 1. The recess 10 is formed by molding at the same time when the plastic bottle 1 is manufactured. The cap 2 removed by opening the mouth of the plastic bottle 1 is pushed into the recess 10 which is the cap locking portion 3. The recess 10 may have various shapes, but a typical one may have a circular shape as shown in FIG. 5A or a quadrangular shape as shown in FIG. 5B. . The recess 10 is formed using the container wall of the plastic bottle 1. Here, for convenience, the container wall serving as the bottom of the recess 10 is referred to as the bottom wall 11, and the container wall serving as the sidewall of the recess 10 is defined as the side wall. Say twelve. Therefore, the side wall part 12 extends from the outer wall surface 1A of the plastic bottle toward the inside of the plastic bottle and is integrally connected to the substantially flat bottom wall part 11.

  When the cap locking portion 3 has a circular shape as shown in FIG. 5 (A), the side wall portion 12 is located near the bottom wall portion 11, that is, at the root portion, as shown in FIG. 4 (A). It is curved to form a circle with a diameter D that is approximately the same as or slightly larger than the diameter W1 of the large diameter portion 2A. In addition, a protruding portion showing a narrow portion is formed on the side wall portion 12 on the way from the outer wall surface 1A of the plastic bottle 1 to the bottom wall portion 11, and the protruding end 12 'of the protruding portion is a circle having a diameter d smaller than the diameter D. Draw. Similar to the first embodiment, the diameter d is somewhat smaller than the diameter W1 of the large cap diameter portion 2A, and is approximately equal to or somewhat larger than the diameter W2 of the cap outer diameter portion 2B (W2 ≦ d <W1). That is, the protruding end 12 ′ of the protruding portion of the side wall portion 12 from the outer wall surface 1A to the bottom wall portion 11 of the PET bottle 1 draws a circle or a partial circle having a diameter d smaller than the diameter W1 of the cap large diameter portion 2A. A circle or a partial circle having a diameter D that is formed and is substantially the same as or slightly larger than the diameter W1 of the cap large-diameter portion 2A is formed at the base portion of the side wall portion 12.

  Therefore, also in the second embodiment, the elasticity of the container wall of the PET bottle 1 can be used to easily push the mouth portion of the cap 2 into the recess 10 with a slight force. Since the cap 2 has a large-diameter portion 2A in the base portion of the large diameter D in the recess 10 and is locked by the protruding portion of the side wall portion 12 having a small diameter, the cap 2 can be reliably and stably protruded. 10 is held. By making the container wall of the plastic bottle 1 forming the recess 10 into such a structure, the depth y of the recess 10 can be reduced to about 5 millimeters or less. If it is this degree of unevenness, in view of the shape of the general PET bottle, the size of the unevenness, no matter where the recess 10 is provided in the container wall of the PET bottle, there is no damage in the distribution process, It does not cause trouble in vending machines. And since it has such a locking structure, not only can the cap 2 be locked in the recess 10 easily and reliably, but also in a state where the cap 2 is locked in the recess 10, Even if force is applied to the bottle 1 and the plastic bottle 1 is slightly deformed, the cap 2 does not come off from the recess 10.

  When the recess 10 has a quadrangular shape as shown in FIG. 5B, the four sides of the quadrangular side wall portion 12 are respectively shown as sides 12A, 12B, 12C, and 12D as shown in FIG. 5B. , The distance between the side 12A and the side 12C, that is, the distance between the protruding ends of the protruding portions as described above between the side 12A and the side 12C, and the distance between the side 12B and the side 12D, that is, the side 12B and the side 12D. The distance between the protruding ends of the protruding portions as described above is somewhat smaller than the diameter W1 of the cap large diameter portion 2A of the cap 2 as shown in FIGS. 2 and 4, and the diameter W2 of the cap outer diameter portion 2B. Is set to be approximately the same as or somewhat larger. Also in this case, in the vicinity of the bottom wall portion 11 forming the bottom surface of the recess 10, that is, at the root portion, the side wall portions of the sides 12A, 12B, 12C, and 12D are as shown in FIGS. The cap 2 is curved so as to exhibit an interval similar to or larger than the diameter W1 of the cap large-diameter portion 2A, and receives the cap large-diameter portion 2A. In this case, the center portions of the side wall portions of the sides 12A, 12B, 12C, and 12D mainly prevent the cap 2 from falling off. In this case, if at least the bottom wall portion 11 in the recess 10 is substantially flat, either the side wall portions of the sides 12A and 12C or the side wall portions of the sides 12B and 12D may be formed. . Further, it is better if the side wall portions of these sides are arcuate. In addition, when the recess 10 is a square, it is not restricted to a quadrangle but may be a polygon such as a triangle or a pentagon. Even when the recess 10 is square, the same effect as in the case where the recess 10 is circular can be obtained.

[Embodiment 3]
A third embodiment of the present invention will be described with reference to FIG. FIG. 6 is a partially enlarged view of the cap and the cap locking portion, and the same symbols as those shown in FIGS. 1 to 5 indicate members having the same names as the members in those drawings. As mentioned before, the cap large-diameter portion 2A in the mouth portion of the cap 2 of the PET bottle 1 may be a belt-shaped member having a certain width as shown in FIG. In this case, whether the cap locking portion 3 is formed by the above-described protrusion or the above-described recess, the side wall surface 13 of the cap locking portion 3 is the bottom wall surface as shown in FIG. It is necessary that the narrow portion is formed by the projecting portion projecting in the middle of 14 and expands to have a height sufficient to receive the cap large-diameter portion 2A in the vicinity of the bottom wall surface 14, that is, at the root portion. . Usually, the width of the cap large-diameter portion 2A of the cap 2 of the plastic bottle 1 is about 1 millimeter or a little over 1 millimeter. If the inner wall surface having the same diameter has a height of about 1 millimeter, the cap large-diameter portion 2A is received and the cap 2 is securely and stably held by the cap locking portion 3. Is possible.

[Embodiment 4]
Embodiment 4 which is a modification of Embodiment 1 of the present invention will be described with reference to FIG. FIG. 7A is a view for explaining the relationship between the cap locking portion of the fourth embodiment formed on a PET bottle and the cap. The same symbols as those shown in FIGS. 1 to 6 indicate members having the same names as the members in the drawings. The fourth embodiment is different from the first embodiment in that the protrusions 4 and 5 forming the cap locking portion 3 do not form a part of the inner wall surface of the container wall of the PET bottle 1 and It is a point attached to the wall surface 1A integrally. The protrusions 4 and 5 are preferably formed on the outer wall surface 1 </ b> A of the container wall of the PET bottle 1 by molding at the same time as the PET bottle 1 is manufactured. The cap 2 is defined by the diameter of the cap large-diameter portion 2A, the shape of the projections 4 and 5 with respect to the diameter of the cap outer-diameter portion 2B, the interval between the portions, or the arc-shaped inner wall surfaces of both the projections 4 and 5. Since the relationship of the dimensions such as the diameters D and d of the circle is the same as that of the first embodiment, the description thereof is omitted. In addition to the fourth embodiment, the cap locking portion 3 is not limited to two protrusions, or a circular shape or a polygonal shape in the first embodiment, but three pieces formed at substantially equal intervals. You may consist of the above projection part. In this case, the partial circles defined by the respective portions of the inner wall surface of the three or more protrusions have a diameter adapted to the diameter of the cap large-diameter portion 2A and the diameter of the cap outer-diameter portion 2B. do it.

It is a figure which shows the PET bottle which has the latching | locking part for caps of Embodiment 1 which concerns on this invention. It is a figure for demonstrating the plastic bottle of Embodiment 1 which concerns on this invention. It is a figure which shows the PET bottle which has the latching | locking part for caps of Embodiment 2 which concerns on this invention. It is a figure for demonstrating the PET bottle of Embodiment 2 which concerns on this invention. It is a figure for demonstrating the shape of the latching | locking part for caps. It is a figure for demonstrating the latching part for caps of the PET bottle of Embodiment 3 which concerns on this invention. It is a figure for demonstrating the plastic bottle of Embodiment 4 which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... PET bottle 1A ... Outer wall surface of PET bottle 1A '... Outer wall surface 1A' located between projection part 4 and 5 in outer wall surface 1A
2 ... Cap 2A ... Cap large diameter part 2B ... Cap outer diameter part 3 ... Cap locking part 4,5 ... Protrusions 4A, 5A ... Protrusions 4,5 Side wall surface 10... Recess 11 forming the cap locking portion 3... Bottom wall portion of the recess 10 12. Side wall portion of the recess 10 12 ′. Projection end of protruding portion 13... Side wall surface of cap locking portion 3 14... Bottom wall surface of cap locking portion 3

Claims (4)

In a plastic bottle comprising a cap locking portion that detachably locks a cap that is a lid of the plastic bottle on the outer wall surface of the plastic bottle,
The cap locking portion is composed of an annular protruding portion or two or more protruding portions protruding from the outer wall surface,
The diameter of a circle or a partial circle formed by the side wall portion of the annular projection portion, or the width between the side wall portions of the two or more projection portions is a large cap located at the mouth portion of the cap in the vicinity of the outer wall surface. A PET bottle characterized by being equal to or larger than the outer diameter of the diameter portion, and smaller than the outer diameter of the large-diameter portion of the cap at a portion away from the outer wall surface. In a plastic bottle comprising a cap locking portion that detachably locks a cap that is a lid of the plastic bottle on the outer wall surface of the plastic bottle,
The cap locking portion comprises a side wall portion and a bottom wall portion in which a part of the container wall of the PET bottle is recessed to form a recess,
The side wall portion is curved to have a protruding portion that forms a narrow portion of the recess,
The diameter of the circle formed by the protruding end of the protruding portion or the partial circle or the interval between the protruding ends of the protruding portion is smaller than the outer diameter of the large diameter portion of the cap located at the mouth of the cap,
The plastic bottle according to claim 1, wherein a base portion of the protruding portion near the bottom wall portion is equal to or larger than an outer diameter of the large-diameter portion of the cap. In claim 1 or claim 2,
The plastic bottle according to claim 1, wherein the side wall of the protrusion or the recess has an arc adapted to an outer circumference of the cap. In any one of Claims 1 thru | or 3,
The height of the said protrusion part or the depth of the said recessed part is 1/2 or less of the height of the said cap, The PET bottle characterized by the above-mentioned.

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