JP6476683B2 - Plastic container - Google Patents

Description

  The present invention relates to a thin-walled and lightweight synthetic resin container, and more particularly to a thin-walled and lightweight synthetic resin container used for a water server or the like.

A bottle-shaped synthetic resin container made of a synthetic resin container such as a polyester resin such as polyethylene terephthalate is widely known, and in particular, a synthetic resin container containing a beverage or the like is well known.
As one of the uses of such a bottle-shaped synthetic resin container, a large bottle-shaped synthetic resin container for filling water such as mineral water in a water server or the like is known.
However, in this large plastic container for water filling, a film back type considering the disposal and hygiene, the film back is stored in a cardboard case, and in addition to hygiene, it is convenient for transportation and installation. Since the added back-in-box type has become the mainstream, there are various types of one-way (disposable) shapes that have recently been considered for disposal and hygiene in the large bottle-shaped synthetic resin container types described above. Has been proposed (see, for example, Patent Documents 1 and 2).

Utility Model Registration No. 3140278 JP 2010-42859 A

However, in conventional large synthetic resin containers, when the contents are reduced when the contents are poured out or when the volume is reduced when discarded, the collapsed container returns to its original shape for some reason. In some cases, the shape of the container suddenly changes or deforms and a loud sound is often generated, and there is a problem that the sound is generated more in a large container than in a small container.
In particular, large synthetic resin containers used for water servers are generally popular in that a container filled with water is installed at the top of the server. The container was deformed during pouring or during installation, generating a loud sound, resonating in the vicinity of the water server installation location, and causing surprise and discomfort.

The container described in the above-mentioned Patent Document 1 is lightweight and maintains necessary strength, but no measures are taken for measures against sound generated at the time of volume reduction.
In addition, the container described in Patent Document 2 described above is provided with a bellows part, so that the volume easily changes and the generation of sound generated during volume reduction is reduced. However, when the container is blow molded, There was a problem that the bellows part was easily whitened and molding was difficult.

  The present invention solves the above-mentioned problems, maintains the necessary strength even when it is thin and lightweight, facilitates deformation at the time of volume reduction and recovery, and has a sharp shape. It is an object of the present invention to provide a synthetic resin container that suppresses the generation of loud sounds without changing.

Container according to the present invention, mouth, neck, shoulders, a synthetic resin container of the bottle shape having a body portion and a bottom portion, said body portion has a plurality extending in each circumferential direction at different positions in height And a plurality of vertical grooves extending at different positions in the circumferential direction so as to cross the plurality of horizontal grooves and to be divided, and the vertical grooves are formed in two directions in the circumferential direction by the plurality of horizontal grooves and the vertical grooves. A plurality of convex islands surrounded by the horizontal grooves in at least one of the vertical directions is formed, and in the plurality of horizontal grooves, protrusions are circumferential directions between all the upper and lower convex islands. The above-mentioned problems are solved by providing at least one of the plurality of lateral grooves in the circumferential direction at the intermediate position corresponding to each of the convex island portions .

According to the container according to the first aspect of the present invention, the body portion is divided so as to intersect with the plurality of lateral grooves extending in the circumferential direction at different heights and to intersect with the plurality of lateral grooves at different positions in the circumferential direction. A plurality of vertical grooves extending are provided, and a plurality of convex islands are formed by the plurality of horizontal grooves and the vertical grooves surrounded by two vertical grooves and at least one horizontal groove in the vertical direction. In the lateral groove, the protrusions are arranged at intermediate positions in the circumferential direction between all the upper and lower convex islands, and at least one lateral groove is provided in the circumferential direction corresponding to each convex island. By being provided so as to be divided, the vertical groove and the horizontal groove become valley fold deformation portions while maintaining the necessary strength even when thin and light, and deformation for volume reduction and restoration becomes easy. .
In addition, by providing a protrusion at the middle position in the circumferential direction of the upper and lower convex island parts, when the trunk part deforms at the time of volume reduction or return, the protrusion part becomes a mountain fold deformation part as a whole The shape of the sound does not change abruptly and the generated sound can be reduced .
In addition, since the protruding portion is provided at an intermediate position in the circumferential direction between all the upper and lower convex island portions, when the body portion is deformed at the time of volume reduction or return, the direction in which the deformation starts Regardless, the overall shape does not change abruptly, and the generated sound can be reduced.

According to the configuration of the second aspect of the present invention, the vertical groove is formed shallower than the horizontal groove, and the protruding portion is formed lower than the convex island portion, so that it is thin and lightweight while preventing rapid deformation. It is possible to sufficiently secure the strength to maintain the shape made of the synthetic resin by the vertical grooves and the horizontal grooves even when it is made.
According to the configuration of the third aspect of the present invention , the bottom portion has a bottom center portion located in the center of the bottom surface side, an annular bottom periphery portion around the bottom center portion, and a bottom periphery portion to a trunk portion. The bottom peripheral portion is provided with peripheral bottom grooves extending radially from the outer peripheral edge of the bottom central portion to the bottom side surface portion, thereby facilitating the bottom central portion and the bottom peripheral portion. It is possible to deform in the mouth direction.
As a result, when the body part is deformed during volume reduction or return, the bottom center part and the bottom peripheral part are also deformed in the mouth direction at the same time, and this deformation acts as a buffer to further suppress sudden changes in shape. , The generated sound can be reduced.
According to the configuration of the present invention , the side surface groove is provided on the bottom side surface portion at a position that continues from the outer peripheral edge of the bottom peripheral portion to the longitudinal groove of the trunk portion, so that it is thin and lightweight. It is possible to maintain the necessary strength on the bottom side surface portion even when it is made.
Further, when the body portion is deformed at the time of volume reduction or return, deformation is facilitated because the position of the side groove coincides with the vertical groove on the valley fold side.
According to the configuration of claim 5 , the central bottom groove extends radially from the gate portion at the center of the bottom center portion, and the tip end portion is located between the peripheral bottom grooves, thereby reducing the thickness and weight. In this case, the rigidity of the gate portion provided at the center of the bottom center portion can be ensured.

According to the configuration of the present invention , the shoulder portion is provided with the shoulder groove extending radially toward the longitudinal groove of the trunk portion at a position continuous to the longitudinal groove, thereby being thin and lightweight. It becomes possible to keep the strength required for the shoulder even when it is changed.
Further, when the body portion is deformed at the time of volume reduction or return, the shoulder groove is aligned with the longitudinal groove on the valley fold side, so that the deformation is facilitated.
According to the structure of this Claim 7 , the intensity | strength of a shoulder part can be made still stronger by providing the protrusion part extended radially from between the shoulder part groove | channels of a shoulder part.
In particular, when supporting a synthetic resin container filled with water upside down on a water server or the like, the shoulder portion is generally held by a circumferential receiving portion. Although there is a risk of bending, it is possible to prevent this bending by providing radially extending protrusions.
According to the configuration of the present invention , the irregular island pattern is formed on the surface of the convex island portion, so that the light is irregularly reflected on the surface of the convex island portion, and there is a problem with the transparent cylindrical container. It is possible to prevent accidents such as fires and fires by suppressing the lens effect.
According to the configuration of the ninth aspect of the present invention, the protrusions are formed so as not to overlap with the center line in the circumferential direction of the convex island portion, thereby inhibiting the above-described protrusion from becoming a mountain fold deformation portion. There is nothing.
According to the configuration of the tenth aspect of the present invention , 4n vertical grooves (n is a natural number) are provided at equal intervals in the circumferential direction, so that the surfaces of the convex island portions opposed in the circumferential direction are always parallel. In addition, since the surfaces of other opposing convex islands having different angles by 90 degrees exist, the container can be stably accommodated in the rectangular case.

The perspective view of the synthetic resin container which concerns on 1st Embodiment of this invention. The front view of the synthetic resin container which concerns on 1st Embodiment of this invention. The top view of the synthetic resin container which concerns on 1st Embodiment of this invention. The bottom view of the synthetic resin container which concerns on 1st Embodiment of this invention. Explanatory drawing of a deformation | transformation of the trunk | drum of a synthetic resin container. Explanatory drawing which set the synthetic resin container to the water server. The perspective view of the synthetic resin container which concerns on 2nd Embodiment of this invention. The perspective view of the synthetic resin container which concerns on 3rd Embodiment of this invention. The perspective view of the synthetic resin container which concerns on 4th Embodiment of this invention.

A synthetic resin container 100 according to the first embodiment of the present invention has a bottle shape having a mouth portion 101, a neck portion 102, a shoulder portion 103, a trunk portion 104, and a bottom portion 105, as shown in FIGS. For example, a 12-liter PET bottle.
In the body portion 104 of the synthetic resin container 100, three horizontal grooves 141 extending in the circumferential direction intersect the three horizontal grooves 141 at a right angle in the height direction and are divided into the horizontal grooves 141 and extend to be divided into the horizontal grooves 141. 142 are provided at equal intervals in the circumferential direction, and the three lateral grooves 141 and the 16 longitudinal grooves 142 are surrounded by the longitudinal grooves 142 in two circumferential directions and the lateral grooves 141 in at least one of the vertical directions. Sixty-four convex island portions 143 are formed.
Further, the vertical groove 142 is formed shallower than the horizontal groove 141, and in this horizontal groove 141, the protrusion 144 is between the upper and lower convex island parts 143 at the center position in the circumferential direction, and the horizontal groove 141 in the circumferential direction. It is provided to divide. The protrusion 144 is formed lower than the convex island 143 and higher than the vertical groove 142 described above.
Further, on the surface of the convex island part 143, a concave-convex pattern 145 like a drop is symmetrically formed without overlapping on the circumferential center line C (see FIG. 5) of the convex island part 143 as will be described later. It has been subjected.

The bottom portion 105 of the synthetic resin container 100 is connected to the bottom central portion 150 located at the center on the bottom surface side, the annular bottom peripheral portion 160 located around the bottom central portion 150, and the bottom peripheral portion 160 to the trunk portion 104. And a bottom side surface portion 170.
The bottom central portion 150 has a concave gate portion 152 at the center thereof and eight central bottom grooves 151 extending radially from the gate portion 152 to the bottom peripheral portion 160, and the bottom peripheral portion 160 has a bottom center portion 150. Sixteen peripheral bottom surface grooves 161 extending radially from the outer peripheral edge of the portion 150 to the bottom side surface portion 170 are formed, and the bottom side surface portion 170 includes sixteen side surface grooves 171 extending from the outer peripheral edge of the bottom peripheral portion 160 to the body portion 104. , Each provided.
In addition, the front end portion of the bottom bottom portion 150 on the peripheral bottom portion 160 side of the central bottom surface groove 151 is provided between the peripheral bottom surface grooves 161, and the bottom bottom surface portion 160 has a bottom bottom surface groove 161 on the bottom side surface portion 170 side. The front end portion is provided at one end portion of the side surface groove 171, and the side surface groove 171 of the bottom side surface portion 170 is provided at a position where the other front end portion is continuous with the lower end portion of the vertical groove 142 of the body portion 104. As a result, the central bottom groove 151 is provided at a position that is not continuous with any of the side face grooves 171, but the peripheral bottom face groove 161, the side face groove 171, and the vertical groove 142 are provided at continuous positions.

The shoulder 103 of the synthetic resin container 100 has 16 shoulder grooves 131 extending radially from the neck 102 toward the longitudinal groove 142 of the trunk 104, and the lower end thereof is positioned at the upper end of the longitudinal groove 142. 16 protrusions 132 extending radially are provided between the adjacent shoulder grooves 131. Thereby, since each groove | channel from the shoulder part groove | channel 131 to the peripheral bottom face groove | channel 161 through the side surface groove | channel 142 and the side surface groove | channel 171 mentioned above continues, a deformation | transformation becomes easy at the time of volume reduction at the time of volume reduction or a reset.
The neck portion 102 and the mouth portion 101 are not provided with any special grooves or protrusions except for threads and beads for attaching a generally necessary lid (not shown).

Regarding the synthetic resin container 100 configured as described above, as shown in FIG. 6, as shown in FIG. 6, about the deformation operation when the water is poured out from the mouth portion 101 and supported by being inverted by a water server or the like. explain.
First, when water is gradually discharged from the synthetic resin container 100 filled with water, the inside of the container is decompressed, and the bottom center part 150 and the bottom peripheral part 160 of the bottom part 105 are deformed in the direction of the mouth part 101. The volume is reduced and water is gradually discharged, and a force to deform the body portion 104 inward of the synthetic resin container 100 is also applied. For this reason, the deformation when the volume of the synthetic resin container 100 is reduced first occurs from the bottom portion 105, and then shifts to the trunk portion 104.
The inward deformation of the body portion 104 starts when one of the intersections of the three lateral grooves 141 and the sixteen longitudinal grooves 142 becomes a valley fold portion and is recessed inward, and the recess becomes larger. Other intersections are also recessed inward one after another and the volume is reduced and water is poured out.

For example, as shown in FIG. 5, when the groove A is recessed inward from the two A points of the lateral groove 141 divided by the protrusion 144, bending stress is applied to the middle part of the two A points, and the A point is Since the deformation is easy as the starting point of the valley fold, the bending stress as the starting point of the mountain fold increases as the distance from the B point at the center (projection 144) between the lateral grooves 142 increases.
In the present embodiment, since the protrusion 144 is provided at the point B, the protrusion 144 is easily deformed as a starting point of the mountain fold while the bending stress near the point B of the lateral groove 141 is relatively small. Therefore, the shape does not change abruptly and the generated sound can be reduced.
On the other hand, in the case of the container not having the protrusion 144 described above, the dents at the two points A become large, and the bending stress at the middle part of the point A folds the vicinity of the point B of the lateral groove 141 to fold the mountain. When this occurs, a mountain fold is suddenly generated at or near point B, and the bending stress in the middle part of the previous term is suddenly released, so that the shape changes suddenly and a loud sound is generated.

Further, when the above-described protrusion B at the point B becomes a mountain fold, the upper and lower convex islands 143 also become vertical folds, but the uneven pattern 145 has the convex island 143. Since it is formed symmetrically without overlapping on the center line C, the convex island 143 does not hinder the mountain fold, and easily becomes a mountain fold along the center line C. . Furthermore, when molding the synthetic resin container 100, the mold can be easily released from the mold, and the center line C can be a joint between the two molds. The molding can be performed without affecting the molding of 145.
The concave / convex pattern 145 suppresses the lens effect which is a problem in the transparent cylindrical container by causing irregular reflection of the surface light when the area of the convex island portion 143 is large like a 12-liter container, for example.・ It is possible to prevent the occurrence of blur.

In the present embodiment, the protrusion 144 that divides the lateral groove 141 is provided between all the upper and lower convex islands 143, but it is only required to be provided at a plurality of locations on the entire circumference. Providing at equal intervals is preferable because generation of loud sounds can be further suppressed. In addition, by providing it between all the upper and lower convex islands 143, the degree of freedom of deformation at the time of volume reduction and restoration is improved.
Further, when the synthetic resin container 100 is supported by being inverted by a water server or the like, as shown in FIG. 6, a receiving part 201 such as a water server abuts on the shoulder 103 in a circular shape to support the entire weight.
In the present embodiment, as shown in FIG. 7, a synthetic resin container 100 a in which no protrusion 132 extending radially is provided between the shoulder grooves 131 and only the shoulder groove 131 is provided in the shoulder 103. Further, since the shoulder portion 103 has rigidity, deformation such as a dent, damage, and buckling due to the receiving portion 201 can be prevented. (Same parts are given the same reference numerals.) However, by providing protrusions 132 that extend radially between adjacent shoulder grooves 131 of the shoulder 103 as in the present embodiment shown in FIGS. Since the rigidity of the shoulder portion 103 is further increased, deformation, damage, buckling, and the like due to a dent portion in contact with the receiving portion 201 are further prevented, and the synthetic resin container 100 can be made thin and lightweight. The protrusion 132 is preferably provided.

The synthetic resin containers 100 and 100a of the above-described embodiment are examples applied to PET bottles having a capacity of 12 liters, for example. However, application examples of PET bottles having a capacity of 8 liters smaller than other 12 liter containers are illustrated in FIG. As shown in FIG.
A synthetic resin container 100b shown in FIG. 8 has the trunk portion 104 as a small diameter and is thin, and the surface of the convex island portion 143 does not have the uneven pattern 145. 100 is configured in the same manner (the same parts are denoted by the same reference numerals).
Moreover, the synthetic resin container 100c shown in FIG. 9 is a synthetic resin container which does not have the protrusion part 132 in the shoulder part 103 in the synthetic resin container 100b mentioned above. Similar to the synthetic resin container 100a described above, the rigidity of the shoulder 103 can be imparted without forming the protrusion 132 of the shoulder 103.
Thus, in a synthetic resin container having a relatively medium capacity and a small barrel diameter, the convex shape is not required even if the concave and convex pattern 145 is formed on the surface of the convex island portion 143 of the trunk portion 104 described above. Mountain folding of the island part 143 becomes possible.
Furthermore, since the area of the convex island portion 143 is small in a container having a small trunk diameter, it is not necessary to consider the occurrence of fire and blur due to the lens effect described above, and the uneven pattern 145 need not be formed. .

As mentioned above, although the embodiment of the synthetic resin container of the present invention has been described, in the synthetic resin container of the present invention, the lateral groove 141, the vertical groove 142 of the trunk portion 104, the shoulder groove 131 of the shoulder portion 103, and the bottom portion 105. The number, depth, shape, position, etc. of the central bottom groove 151, the peripheral bottom groove 161, and the side groove 171 can be individually designed and selected appropriately according to the size and thickness of the synthetic resin container. .
For example, the convex island portion 143 of the body portion 104 may be formed in a rhombus or a parallelogram, and the transverse groove 141 and the longitudinal groove 142 may be provided so as to intersect at a predetermined angle other than 90 degrees.
However, in any shape of the projecting island portion 143, it is preferable that the horizontal grooves 141 and the vertical grooves 142 are installed at equal intervals, because sound generated by deformation efficiently can be reduced step by step. .
Moreover, although the position of the protrusion 144 provided on the trunk 104 may be a position biased to either the left or right, it is provided at the center between the upper and lower convex islands 143 as in this embodiment. It is preferable that the sound generated by efficiently deforming in stages can be reduced.
Furthermore, since the vertical grooves 141 are provided with 4n (n is a natural number) and equidistant in the circumferential direction, the surfaces of the convex island portions 143 opposed in the circumferential direction are always parallel, and the angle is 90. Since there are surfaces of other opposing convex islands in different directions, a large number of synthetic resin containers can be stably stored in a rectangular case such as cardboard.

  The synthetic resin container of the present invention can be applied to any capacity and use as long as it is a bottle-shaped synthetic resin container. For example, a large PET bottle for setting in an inverted state on a water server or the like It is suitable for a large synthetic resin container.

DESCRIPTION OF SYMBOLS 100 ... Synthetic resin container 101 ... Mouth part 102 ... Neck part 103 ... Shoulder part 104 ... Body part 105 ... Bottom part 131 ... Shoulder groove | channel 132 ... Projection part 141 ... Horizontal groove 142 ... Vertical groove 143 ... Convex island part 144 ... Projection part 145 ... Concave and convex pattern 150 ... Bottom center part 151 ... Center bottom face groove 152 ... Gate Part 160 ... Bottom peripheral part 161 ... Peripheral bottom groove 170 ... Bottom side part 171 ... Side groove 201 ... Receiving part (water server)

Claims (10)

A bottle-shaped synthetic resin container having a mouth, neck, shoulder, trunk, and bottom ,
The body portion is provided with a plurality of horizontal grooves extending in the circumferential direction at different heights, and a plurality of vertical grooves extending so as to intersect and be divided at the different positions in the circumferential direction .
By the plurality of horizontal grooves and vertical grooves, a plurality of convex island portions surrounded by the vertical grooves in two circumferential directions and at least one of the horizontal grooves in the vertical direction are formed,
In the plurality of lateral grooves, at least one of the plurality of lateral grooves corresponds to each of the convex island portions at a circumferential intermediate position between all the upper and lower convex island portions. A synthetic resin container characterized by being provided so as to be divided in the circumferential direction. The vertical groove is formed shallower than the horizontal groove,
The synthetic resin container according to claim 1, wherein the protrusion is formed lower than the convex island. The bottom portion has a bottom center portion located in the center of the bottom surface side, an annular bottom periphery portion located around the bottom center portion, and a bottom side surface portion connected from the bottom periphery portion to the trunk portion,
The synthetic resin container according to claim 1 or 2, wherein a peripheral bottom surface groove extending radially from the outer peripheral edge of the bottom center portion to the bottom side surface portion is provided. 4. The synthetic resin container according to claim 3 , wherein a side groove is provided on the bottom side surface portion at a position continuous with a longitudinal groove of the body portion from an outer peripheral edge of the bottom peripheral portion. Wherein the bottom central portion, the central bottom groove, the radially extending from the gate portion of the central portion of the bottom central portion, according to claim 3 or claims that tip, characterized in that located between the peripheral bottom groove Item 5. A synthetic resin container according to Item 4 . The shoulder, the shoulder grooves extending radially towards the longitudinal groove of the body portion, to any one of claims 1 to 5, characterized in that provided at a position contiguous to said longitudinal groove The synthetic resin container described. The synthetic resin container according to claim 6 , wherein a projecting portion extending radially is provided between the shoulder grooves of the shoulder portion. The synthetic resin container according to any one of claims 1 to 7 , wherein an uneven pattern is formed on a surface of the convex island portion. The synthetic resin container according to claim 8 , wherein the concavo-convex pattern is formed without overlapping with a circumferential center line of the convex island portion. The synthetic resin container according to any one of claims 1 to 9 , wherein 4n (n is a natural number) of the longitudinal grooves are provided at equal intervals in the circumferential direction.