JP2011068398A - Resin enclosing container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin enclosing container which has a high shape retention property and appearance stability in a container shape. <P>SOLUTION: A resin enclosing container is characterized in that in a flat-like container having a smaller width of the side face to the front and rear surfaces, the front and rear surfaces 11 are convex on the whole in the main axis 10 in the direction connecting a mouth 2 and a bottom 13 of the container and a direction perpendicular to the main axis, and a sinking part 15 for pressure control is provided at least at one middle area 11 Lv between the center and end in the width direction of the front and rear surfaces 11, and a step part 16 is formed between the sinking part 15 and the center and the ends. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a resin enclosure containing contents.

  Resin-made containers are frequently used as enclosing containers for containing contents, and are used for enclosing various contents such as volatile chemicals such as fragrances, beverages, foods, seasonings, and medicines. . The resin enclosure is high in strength, lightweight, and excellent in design.

  On the other hand, the resin constituting the container is desired to reduce the amount used per container not only for the purpose of cost reduction but also for the problem of non-decomposability and generation of combustion gas after disposal. However, if the amount of resin in the container is reduced, the container wall must be thinned, resulting in a decrease in mechanical strength, resulting in the following problems.

  A container with reduced mechanical strength is easily deformed by an impact at the time of movement or an external force when gripped by hand, and the deformation makes it difficult to restore the original shape or gives a feeling of fragility at the time of gripping. In addition, resin-filled containers have the property of releasing vaporized components in the contents through the container wall, although in small quantities each in the distribution storage process such as storage, transportation, display, and storage after purchase. is there. As a result, as the time elapses, the internal volume decreases little by little, causing a problem that the container wall is deformed so as to be recessed due to the reduced pressure in the container. This problem also occurs when the content is a liquid or gel, or a solid or granular material having a volatile component, and is particularly affected in the case of a volatile agent such as a fragrance (including a deodorant). Depending on the contents, the volume of the contents themselves may decrease due to a drop in temperature after sealing in the container or the contents reacting with air. The indentation of the wall becomes a problem.

  In order to cope with these, a structure in which a part of the container wall is bent into a concave shape or a convex shape to form vertical or horizontal reinforcing ribs to enhance the wall strength is known (for example, Patent Document 1, 2 and 3).

Japanese Utility Model Publication No. 63-97607 JP 2000-309329 A JP 2002-326619 A

  However, in a flat container having a side surface with a small width relative to the front and back surfaces and a generally convex shape, it is impossible to cope with deformation of the container due to internal decompression simply by providing reinforcing ribs on the front and back surfaces. That is, when internal decompression occurs, the curvature may be reversed such that the portion is weak and deforms to have a concave shape. In this case, since the front and back surfaces have a large area with respect to the side surface, deformation of the front and back surfaces is conspicuous in appearance and gives a fragile feeling of the container.

  An object of the present invention is to solve these problems of the prior art, and to provide a resin enclosure having high shape retention and high appearance stability with a container shape.

  In order to achieve the above object, the present invention provides a flat container having a small side width with respect to the front and rear surfaces, the main surface connecting the container mouth and the bottom of the container, and the width direction perpendicular thereto. It is generally convex, and at least one intermediate region between the central portion and the end portion in the width direction of the front and back surfaces is provided with an indented portion for pressure regulation, and the central portion and the end portion The present invention provides a resin-sealed container characterized in that a stepped portion is formed between the indented portion.

  According to the resin enclosure according to the present invention, in the flat container having a small side width with respect to the front and back surfaces, a recess is provided in an intermediate region between the center portion and the end portion in the width direction of the front and back surfaces. ing. That is, in the present invention, it is found that the intermediate region is an easily deformable region, and when the internal decompression occurs by providing the indented portion in this region, the indented portion is deformed according to the pressure in the container. Provides a function to absorb pressure fluctuations (pressure regulation function). As a result, when the internal pressure is reduced, the indented portion is deformed so as to be concavely curved, and the shape of the central portion in the width direction of the front and rear surfaces is maintained. In this way, since the indented surface is concavely curved, the change in curvature is less conspicuous than when the flat surface or convex surface is changed to a concave shape, and high appearance stability of the container shape is obtained. .

  Moreover, in this invention, since the step part is formed between the center part and edge part in the width direction of front and back, and the intrusion part, a step part acts as a rib and exhibits the reinforcement effect. That is, at the time of internal decompression, propagation in the width direction of the deformation to be recessed can be blocked by the stepped portion, so that the deformation amount of the front and back surfaces can be suppressed.

  The said structure WHEREIN: It is desirable to form the said intrusion part in both the intermediate | middle area | regions of the said front and back. Thereby, the center part in the width direction of the front and back surfaces becomes a narrow width with respect to the entire width of the container, and becomes a columnar shape sandwiched between two ribs. Thereby, the deformation resistance to the external force acting on the central portion is increased, and it is firm against both internal pressure reduction and external force during gripping.

  The indented portion may be formed continuously along the end portion. As a result, a single indented portion is formed per one intermediate region, and processing becomes easy.

  Moreover, the said intrusion part may be intermittently formed along the said edge part. Thereby, according to a container shape, a material, a conveyance condition, etc., an indentation part can be provided in desired positions, such as an area | region which is especially easy to deform | transform, and it becomes excellent in versatility.

  The area of the entire indented portion on either one of the front and back surfaces is preferably 30 to 60% of the entire surface having the indented portion or the entire back surface. Usually, the area of the entire invaginated portion is sufficient up to 60%, and even if the indented portion is formed exceeding 60%, it is difficult to obtain a pressure absorbing function beyond that. Moreover, since the intrusion area becomes large, it is not preferable in terms of appearance. If the total area of the indented part is less than 30%, the ratio of the indented part to the front and back surfaces becomes small, and the pressure absorbing function cannot be sufficiently obtained.

  The indented portion may have a convex shape in a cross section along the container width direction. As a result, when the internal pressure decreases, the curvature of the invaginated portion is reversed and the deformation is changed from a convex shape to a concave shape, and the amount of deformation can be increased. Therefore, since the absorption rate of the pressure fluctuation per unit area of the invagination portion is increased, the area of the entire invagination portion can be reduced.

  Moreover, the said intrusion part can also be made into a concave shape in the cross section along a container width direction. As a result, when the internal pressure decreases, the deformation occurs so as to increase the concave curve with respect to the decrease of the internal pressure, so that the indented portion is easily deformed, and a function of absorbing pressure fluctuation is easily obtained. Further, the curvature of the indented portion does not reverse, and even if it is recessed, the appearance is not noticeable, and the aesthetic appearance of the container is not impaired.

  Resin flat containers are often manufactured by injection blow molding from the viewpoint of manufacturing efficiency due to short molding time and excellent mass productivity. It's easy to do. Therefore, the above-mentioned advantageous effect can be effectively obtained when the container is formed by injection blow. The reason why the intermediate region of the container formed by injection blow is easily deformed is as follows.

  First, a test tubular molded product called a preform (parison) is manufactured by injection molding, and this preform is inserted into a mold having a predetermined shape and stretched and blown to form a hollow container. For this reason, at the position farthest from the axis of the preform, the stretch distance of the resin is the largest, and the thickness of the container wall is thinner than other portions. When a flat container composed of a front and back surface with a large area and a side surface with a small area is formed by such a method, the wall becomes relatively thin in the vicinity of the side surface of the front and back surface and on the side surface. Of these thin portions, the radius of curvature of the curved surface is small at the corner of the container and in the vicinity thereof, so that the strength is high with respect to the force perpendicular to the curved surface and is difficult to deform. Further, in the central portion in the width direction, the resin stretching distance is the shortest and the thickness of the container wall is thick. Therefore, the strength is high with respect to a force perpendicular to the curved surface, and deformation is difficult. However, in the intermediate region between the center portion and the end portion in the width direction of the front and back surfaces, the radius of curvature is large, and the distance from the preform axis is large, so the wall becomes thin, and the strength is low and the shape is easily deformed. As a result, the intermediate region is a region that is particularly easily deformed by internal decompression.

  As described above, according to the present invention, it is possible to provide a resin encapsulated container that has high shape retention and high appearance stability with a container shape.

It is a front view of one embodiment of a resin enclosure according to the present invention. It is a side view of the resin enclosure shown in FIG. It is a top view of the trunk | drum of the resin enclosure shown in FIG. It is a bottom view of the resin enclosure shown in FIG. FIG. 2 is a cut end view of the resin enclosure shown in FIG. 1 at P0. FIG. 2 is a cut end view of the resin enclosure shown in FIG. 1 at P1. It is a front view of the resin enclosure according to another embodiment of the present invention. It is a side view of the resin enclosure shown in FIG. FIG. 9 is a cut end view of the resin enclosure shown in FIG. 8 at P0. It is a front view of the container which shows the various forms of an intrusion part.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The same or similar parts in the drawings are denoted by the same reference numerals and description thereof is partially omitted. 1-6 has shown one Embodiment of the resin enclosure concerning this invention, FIG. 1 is a front view, FIG. 2 side view, FIG. 3 is a top view, FIG. 4 is a bottom view, FIG. A plane view and FIG. 6 are longitudinal sectional views.

  This resin enclosure includes a body portion 1 and a mouth portion 2, and the mouth portion 2 is opened and closed by screwing and releasing the male screw portion 21 and the female screw 31 of the cap 3. FIG. 1 shows a state in which the cap 3 is removed, and the cap 3 is shown in cross section. FIG. 2 shows a state in which the container mouth is closed by the cap 3.

  The trunk | drum 1 has the front and back 11, the side surface 12, and the bottom face 13, and has comprised the flat shape in the perpendicular direction. The front and back surfaces collectively refer to the front side surface and the back side surface both when the front side surface and the back side surface of the body portion are distinguished from each other and when they are not distinguished.

  The front and back surfaces 11 have the following convex shape. That is, each of the entirety in a direction V (vertical direction in this embodiment) and a width direction H (horizontal direction in this embodiment) perpendicular to the main axis 10 connecting the central portions of the mouth portion 2 and the bottom surface 13 of the container. Convex shape. The curve in the vertical direction V is a weak curve with a large radius of curvature, and the curve in the horizontal direction H is a strong curve with a small radius of curvature. In the present embodiment, in the horizontal cross section at each position in the height direction of the container, the curve in the horizontal direction H is formed with a substantially constant curvature over the entire width 11A of the front and back surfaces (see FIG. 5).

  This container is formed by injection blow. That is, a preform (parison) is manufactured, and this preform is inserted into a mold having a molding surface corresponding to the outer shape of the flat container shown in FIG. . Since the container is molded by such a method, in the intermediate region 11Lv (the region shaded in FIG. 1 and FIG. 2) between the center portion and the end portion in the horizontal direction H of the front and back surfaces 11, The farthest away from the axis, the extension distance becomes the largest, and it becomes thinner than the other parts. Moreover, the radius of curvature is large and the area is large. Together, the intermediate region Lv is weak in strength against a force perpendicular to the curved surface, and becomes a region that is easily deformed by internal decompression.

  A recessed portion 15 is formed in the intermediate region 11Lv. As shown in FIG. 5, the indented portion 15 refers to a surface that is recessed inside the container from a surface that smoothly connects portions adjacent to the outside of the region (positions of front and back surfaces indicated by phantom lines in FIG. 5). In the present embodiment, the invaginated portion 15 is a curved surface having a convex shape in a cross section along the horizontal direction H, and the curvature along the vertical direction V of the indented portion 15 and the curvature along the horizontal direction H are intruded. It is almost the same as the curvature of the non-invaginated portion 17. As a result, the front and back surfaces 11 are composed of the indented portion 15, the non-indented portion 17, and the step portion 16 that connects the indented portion 15 and the non-indented portion 17.

  As shown in FIG. 1, the indented portion 15 extends continuously from the vicinity of the mouth side end portion of the intermediate region 11 </ b> Lv to the vicinity of the bottom end portion thereof, and is continuously formed along the width direction end portions of the front and back surfaces 11. That is, a single indentation 15 is provided for one intermediate region 11Lv, the indentation 15 is provided in almost the entire area of each intermediate region 11Lv on the front surface, and almost the entire area of each intermediate region 11Lv on the back surface. An indentation 15 is provided in the As a result, four indentations 15 are formed in one container. Each of the indented portions 15 is provided symmetrically with respect to the vertical center line of the front and back surfaces 11.

  The step portion 16 is provided at a boundary portion between the indented portion 15 and the non-indented portion 17, and connects the indented portion 15 and the non-indented portion 17. The step portion 16 is configured by a tapered surface that inclines downward from the non-indented portion 17 toward the indented portion 15. As shown in FIG. 1, the stepped portion 16 includes a central portion side and an end portion side in the horizontal direction H of the front and back surfaces 11, and a bottom surface side in the vertical direction V, of the boundary portion between the indented portion 15 and the non-indented portion 17. Is provided.

  The mouth side end in the vertical direction V of the indented portion 15 smoothly transitions from the non-indented portion 17 to the indented portion 15 as shown in FIG. Thus, since the step part is not provided in the mouth part side edge part of the vertical direction V of the indentation part 15, when covering a container with shrink wrapping, a shrink film can be along along the vertical direction V. Further, wrinkles can be prevented from occurring in the shrink film.

  The area of the entire indented portion 15 on any one surface of the front and back surfaces 11 is preferably 30 to 60% of the area of the entire surface having the indented portion 17 or the entire back surface. Further, the ratio of the maximum width 17w of the non-indented portion 17 and the maximum width 15w of the indented portion 15 is set to 1: 1. The dimension of the maximum width 17w of the non-indented portion 17 is desirably 10 mm to 30 mm, and is 25 mm in this embodiment. If it is less than 10 mm, the non-indented portion 17 is easily broken as a column, and if it exceeds 30 mm, the rigidity is insufficient and the non-indented portion 17 is easily recessed.

  The depth 15d of the stepped portion 16 is desirably 0.5 mm to 3.0 mm. If it exceeds 3.0 mm, the depth 15d of the stepped portion 16 becomes too large, and wrinkles are likely to occur when covered with a shrink film, which is undesirable in appearance. In addition, the rigidity of the indented portion 15 becomes too large, and the pressure absorbing function may not be effectively obtained. On the other hand, if it is less than 0.5 mm, the step portion 16 does not act as a rib, and a sufficient reinforcing effect cannot be obtained.

The main dimensions of the illustrated resin enclosure are as follows.
-Container height Ah: 156mm
・ Body height 1h: 110mm
-Front and back width 11w: 94mm
-Side width 12w: 18mm
-Height P0h from bottom to position P0: 68mm
・ Height P1h from bottom to position P1: 40mm
-Curvature radius Rp of weak curve (vertical direction V): 420 mm
・ Weak curvature (vertical direction V) radius of curvature Rq: 840 mm
-Curvature radius R0 at position P0: 60 mm
・ Vertical length 15h of the intrusion 15: 92 mm
・ Maximum width 15w of intrusion 15: 25 mm
-Depth 15d of stepped portion 16 (maximum depth of indented portion 15): 2.0 mm
・ Maximum width 17w of non-indented portion 17: 25 mm
-Wall thickness of front and back surface 11: 0.5 ± 0.1 mm

  When the internal pressure is reduced in the container according to the present embodiment, the invagination portion 15 is deformed according to the pressure in the container to absorb the pressure fluctuation. The deformation occurs so that the curvature of the indented portion 15 is reversed so as to change from a convex shape to a concave shape. Further, the step portion 16 acts as a rib to block the propagation of the indented deformation in the width direction, and the central portion in the width direction of the front and back surfaces 11 becomes a column portion and becomes firm. Together, the central part in the width direction of the front and back surfaces 11 maintains a convex shape.

  In addition, since the indented portion 15 that is depressed from other portions is deformed so as to be further depressed, the change in curvature is not conspicuous as compared to the case where the flat surface or the convex surface changes to a concave shape, and high appearance stability is achieved. can get.

  In this embodiment, since the indentation 15 has a convex shape in the cross section along the container width direction, the amount of deformation can be increased. Therefore, since the absorption rate of the pressure fluctuation per unit area of the intrusion portion 15 is increased, the area of the intrusion portion 15 can be reduced.

  The resin used for manufacturing the container may be polyethylene terephthalate, polyethylene, polypropylene, or the like.

  7 to 9 show a resin enclosure according to another embodiment of the present invention. FIG. 7 is a front view, FIG. 8 is a side view, and FIG. 9 is a cross-sectional view.

  The basic structure of this container is the same as that of the previous embodiment, and the shape of the indented portion 15 is different. In the present embodiment, the front and back surfaces 11 are classified into a front surface (front surface 11a) and a back surface (back surface 11b) of the body portion, and as shown in FIG. ) Only formed.

  As shown in FIGS. 7 and 8, the indented portion 15a extends intermittently from the vicinity of the mouth side end of the intermediate region 11Lv of the surface 11a to the vicinity of the bottom side end along the widthwise end of the surface. Has been. That is, two indentations 15a are provided for one intermediate region 11Lv on the surface 11a, and four indentations 15a are formed on the surface 11a of one container. Further, the indented portion 15a formed in one intermediate region 11Lv and the indented portion 15a formed in the other intermediate region 11Lv are provided symmetrically with respect to the vertical center line of the surface.

  If the indented portion 15a is intermittently formed in one intermediate region 11Lv, a gap is provided between the adjacent indented portions 15a, and this gap becomes a non-indented portion. That is, in one intermediate region 11Lv, a location where the indented portion 15a is not formed and a location where the indented portion 15a is formed are mixed. Thus, when the indentation 15a is not formed in the entire range of the intermediate region 11Lv, the occupation ratio of the area occupied by the entire plurality of indentations 15a formed in the intermediate region 11Lv with respect to one intermediate region 11Lv is , Set to a value larger than a predetermined value. The predetermined value is a lower limit value required for the invaginated portion 15a to exhibit the pressure adjusting function, and is a value determined by a position, a size, a depth, a shape, and the like where the indented portion 15a is provided.

  As shown in FIG. 9, the invaginated portion 15 a of the present embodiment is a curved surface having a concave shape in a cross section along the container width direction H.

  As shown in FIG. 9, the step portion 16a is configured by a groove portion provided between the indented portion 15a and the non-indented portion 17a. As shown in FIG. 7, the step portion 16a is formed over the entire range of the boundary portion between the indented portion 15a and the non-indented portion 17a, that is, over the entire circumference of the indented portion 15a.

  Also in other embodiment, there exists an effect similar to the said embodiment. That is, when the internal pressure decreases in the container of the present embodiment, each indented portion 15a is deformed according to the pressure in the container and absorbs pressure fluctuations. The deformation occurs so as to increase the concave curvature with respect to the decrease in internal pressure. Thereby, the convex part is maintained in the center part in the width direction of the front and back surfaces 11. Moreover, the step part 16a acts as a rib, and can block propagation in the width direction of the indented deformation.

  In this case, since the indented portion 15a has a concave shape in the cross section along the container width direction, the indented portion 15a is easily deformed, and a function of absorbing pressure fluctuation is easily obtained. Further, since the unevenness of the indented portion 15a does not reverse, the deformation becomes less noticeable.

  The position and range where the indented portion 15a is provided can be provided at various positions depending on the container shape, material, transportation status, etc., as long as it is within the range of the intermediate region 11Lv. 10 (a) and 10 (b) show various examples of the invaginated portion 15. FIG. That is, a form provided on the mouth side in the vertical direction V of the region 11Lv as in the indented portion 15b, a form provided in the center in the vertical direction V of the region 11Lv, and a indented portion 15d as in the indented portion 15c. In the case where the width direction dimension is not uniform, or in the case where the width direction dimension is provided intermittently as in the indented portion 15e, the indented portion 15e can be separated. Even in these cases, the occupation ratio of the area occupied by the entire indented portion 15a formed in the intermediate region 11Lv with respect to one intermediate region 11Lv is a predetermined value (necessary for the indented portion 15a to exert the pressure adjusting function) The lower limit value determined by the position, size, depth, shape, etc. where the indented portion 15a is provided is set to a value that is greater than the lower limit value.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this, A various change is possible. For example, in the above-described embodiment, the indented portion 15 is a convex curved surface or a concave curved surface, but may be a curved surface in which concave curved surfaces and convex curved surfaces are mixed. The indented portion 15 is desirably provided symmetrically with respect to the vertical center line of the front and back surfaces 11, but may be non-target. Further, the indented portion 15 may be provided only in one intermediate region 11Lv of the two intermediate regions 11Lv on the front and back surfaces 11. In the case where the indentations 15 are provided intermittently, three or more indentations 15 may be provided in one intermediate region 11Lv. When a plurality of indentations 15 are provided in one intermediate region 11Lv, the shapes and sizes of the indentations 15 formed in one intermediate region Lv may be different from each other. In the case where the indented portion 15 is provided only on one surface of the front or back surface 11, it may be provided on either the front surface or the back surface. Moreover, when providing the intrusion part 15 in both the front surface and the back surface, the shape, position, size, and the like of the intrusion part 15 may be different between the front surface and the back surface. In this way, the shape, position, and size of the indentation 15 can be set variously to adjust the size of the pressure absorption function in one container.

  The overall shape of the container has various shapes such as a rectangular shape such as a rectangle or a triangle when viewed from the front, a round shape such as a circle or an ellipse, and a rectangular shape such as a rectangle or a triangle when viewed from the side, an ellipse, or the like. It can be.

DESCRIPTION OF SYMBOLS 1 Body part 2 Mouth part 3 Cap 10 Main axis | shaft 11 Front and back surface 11Lv Middle area | region 12 Side surface 13 Bottom face 15 Intrusion part

Claims (8)

In a flat container having a small side width with respect to the front and back surfaces, the front and back surfaces are each generally convex in the main axis direction connecting the container mouth portion and the container bottom portion and in the width direction perpendicular thereto,
At least one of the intermediate regions between the center and the end in the width direction of the front and back surfaces is provided with an indented portion for pressure regulation,
A resin enclosure characterized in that stepped portions are formed between the central portion and the end portion and the indented portion.   The resin enclosure according to claim 1, wherein the indented portion is formed in both intermediate regions of the front and back surfaces.   The resin enclosure according to claim 1 or 2, wherein the indented portion is formed continuously along the end portion.   The resin enclosure according to claim 1 or 2, wherein the indented portion is formed intermittently along the end portion.   5. The area according to claim 1, wherein an area of the entire indented portion on either one of the front and back surfaces is 30 to 60% of an area of the entire front surface or the entire back surface having the indented portion. The resin enclosure as described.   The resin enclosure according to any one of claims 1 to 5, wherein the indented portion has a convex shape in a cross section along the container width direction.   The resin enclosure according to any one of claims 1 to 5, wherein the indented part has a concave shape in a cross section along the container width direction.   The resin enclosure according to any one of claims 1 to 7, which is formed by injection blow.

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