JP2006256693A - Container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container in which a requisite strength and recovering characteristic are applied to a slant surface of a waist part of the container to prevent either a depression or a deformation at the slant surface of the waist part and facilitate its holding manner even if its weight is made light and its wall is made thin. <P>SOLUTION: This bottle container 1 has a waist groove 61 and a holding depression 63 at a substantial central part of a barrel 4 in its height direction. An area including a container bottom side connecting surface 61c of the waist groove 61 is provided with a finger accommodating depression 62 that protrudes like a convex curved surface inside the container. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a container having a waist portion at the center of the body in the height direction, and particularly to a thin plastic bottle container that is lightweight and highly recoverable.

Plastic bottle containers such as PET bottles are easy to mold and suitable for mass production, and have excellent properties such as high mechanical strength and light weight, so they are filled with various liquids. Used as a container in a wide range of fields.
In particular, in recent years, it is used in large quantities as containers for beverages such as various beverages and mineral water.

  And about the capacity | capacitance of a bottle container, many types exist according to the request | requirement of a market. For example, a container having a capacity of about 2 liters is used. As for the shape of the bottle container, conventionally, a round shape or a rectangular shape or a square shape taking into consideration refrigerator storage properties has been adopted.

  Further, in a bottle container having a large capacity, in order to give a necessary strength to the barrel portion, a waist portion that is squeezed mainly along the circumferential direction is formed in the approximate center in the height direction of the barrel portion. The waist portion not only functions as a reinforcing portion, but also functions as a gripping portion that hooks a finger when the bottle container is held with one hand, so that the ease of holding the bottle container can be improved.

  By the way, in recent years, the thickness of a bottle container has become thin and the strength of the bottle container has been reduced as a whole due to the trend toward lighter containers with resource saving. In such a thin bottle container that has been reduced in weight, it is required to provide necessary strength and resilience by forming a horizontal bead etc. in the body part to prevent the bottle container from being dented or deformed. (For example, refer to Patent Document 1).

JP 2004-250063 A

  However, in a bottle container that has been reduced in weight to a certain extent, even if a horizontal bead is formed on the body part, when the bottle container collides with each other during manufacture or transportation, or when the container is gripped by hand, the container It has been found that dents and deformations occur in the waist when displayed at stores. In many cases, this dent or deformation occurs on the slope of the waist groove (including the circular arc surface), and even if the position of the lateral bead formed on the body portion is changed, it cannot be prevented.

Patent Document 1 discloses a container in which a grip portion is formed on a waist portion.
However, with this gripping part alone, the force concentrates on the two fingers, the thumb holding the gripping part, the index finger, or the middle finger. When pouring, the container waist part deforms and buckles, making it difficult to handle. In addition, in order to disperse the force of two fingers, if a force is applied by applying a middle finger or ring finger to the slope of the grip part or the slope of the waist part, the slope will be deformed due to insufficient rigidity of the slope. When bending and buckling, it was difficult to return to the original shape.

  The present invention has been considered in view of the above circumstances, and in a thin-walled container that has been reduced in weight, in particular, imparts necessary strength and resilience to the waist slope and its vicinity, An object of the present invention is to provide a container that can prevent dents and deformations and that can be easily held.

  In order to achieve the above object, the container of the present invention is a container having a mouth part, a body part, and a bottom part, in the center of the body part in the height direction, at the container mouth side connection surface, the groove bottom surface, the container bottom part. A waist groove having a side connection surface is formed, and at least one pair of mutually opposing gripping recesses is formed on the waist groove, and at least a region including the container bottom side connection surface of the waist groove, the waist groove On the other hand, at least one finger receiving recess that is located on the bottom side and has a convex curved surface toward the inside of the container is formed.

According to the container of the present invention adopting such a configuration, when holding the container, when a force is applied to the handle, the middle finger other than the thumb having the holding recess and the index finger or the middle finger Or another finger, such as a ring finger, can be applied to the other finger while being brought closer to the finger having the gripping recess, and a force can be applied to the other finger. The finger storage recess shape allows the abdomen of the finger to be wrapped.
In addition, due to the effect of the ridge line forming the edge of the finger receiving recess, the container bottom side connection surface of the waist groove (in other words, the groove bottom surface of the waist groove, and the body portion in the container bottom side direction with respect to the waist groove) For example, which corresponds to the slope of the waist portion) and the restoring force when buckled and deformed. Further, when two finger storage recesses are provided, more preferably at positions facing each other, the thumb of the opposite hand having the gripping recess can be effectively stored when the content liquid is poured with both hands.

In the container of the present invention, the gripping recess includes a container mouth side connection surface and a container bottom side connection surface that are respectively connected to the bottom surface of the gripping recess, and the finger storage recess is a container bottom of the gripping recess. It can be set as the structure provided in the area | region containing a side connection surface.
With such a configuration, not only the effects of the present invention are sufficiently exhibited, but in addition to reinforcing the container bottom side connection surface of the gripping recess, a ridgeline formed on the container bottom side connection surface of the gripping recess and The ridgeline of the finger storage recess is connected, and the container bottom side connection surface of the waist groove is further reinforced.

  The container of the present invention is a rectangular container having a mouth portion, a trunk portion, and a bottom portion, and at the container mouth side substantially at the center in the height direction of at least one pair of mutually opposing surfaces of the trunk portion. A waist groove having a connection surface, a groove bottom surface, and a container bottom side connection surface is formed, and at least one pair of mutually opposing gripping recesses is formed on the waist groove, and at least the container bottom side connection surface of the waist groove At least one finger storage recess that is located on the bottom side with respect to the waist groove and has a convex curved shape toward the inside of the container. In this case, the gripping recess includes a container mouth side connection surface and a container bottom side connection surface that are respectively connected to the bottom surface of the gripping recess, and the finger storage recess defines the container bottom side connection surface of the gripping recess. It is provided in the area including It can be formed.

  In the case of a rectangular container, if the waist groove and gripping recess of the waist part are provided on at least one pair of facing surfaces, and the finger storage recess is provided in one area in the region including the container bottom side connection surface of the waist groove, The container can be gripped, and the effects of finger storage, rigidity, and restoration of the finger storage recess can be exhibited.

Moreover, the container of this invention can be set as the structure which the container bottom part side connection surface of the said holding | maintenance recessed part consists of two or more surfaces continued in a height direction.
With such a configuration, not only the effects of the present invention are sufficiently exhibited, but also the container bottom side connection surface of the gripping recess can be reinforced by increasing the number of ridge lines of the container bottom side connection surface of the gripping recess. .

In the container of the present invention, of the two or more surfaces forming the container bottom side connection surface of the gripping recess, the surface connected to the finger storage recess is an arch along the belt shape on the upper edge of the finger storage recess. In this case, the inclination angle of the arch-shaped surface with respect to the horizontal plane is preferably 30 to 65 °.
With such a configuration, two ridge lines are formed close to each other along the upper edge of the finger storage recess, so that the effect of reinforcing the container bottom side connection surface of the grip recess can be further enhanced. Further, deformation and buckling of the container bottom side connecting surface of the gripping recess can be avoided more effectively, and the degree of finger contact is improved, and the gripping property of the container is further improved.

In the container of the present invention, the vertical cross-sectional shape of the surface connected to the bottom surface of the gripping recess among the two or more surfaces forming the container bottom side connection surface of the gripping recess is a convex curved surface that faces the container outward. It can be set as the structure.
With such a configuration, the rigidity and resilience against the force with which the index finger or middle finger entering the holding recess pushes the upper connection surface is increased, and the deformation and buckling of the container bottom side connection surface of the holding recess is made more effective. It can be avoided. In particular, by forming the surface connected to the bottom surface of the gripping concave portion in a horseshoe shape, it is possible to further improve the rigidity and resilience of the surface itself while improving the tactile sensation when the container is gripped. it can.

Further, in the container of the present invention, the height of the finger storage recess is preferably 5 mm to 30 mm, and the longitudinal cross-sectional shape of the center in the width direction of the finger storage recess is preferably a curved surface having an arc shape. The lateral width of the finger storage recess is preferably 20 mm to 50 mm.
With such a configuration, not only the effects of the present invention are sufficiently exhibited, but also the fit and engagement of the fingers stored in the finger storage recesses are improved while ensuring the strength of the curved surface of the finger storage recesses.

Moreover, the container of this invention can be set as the structure which provided the horizontal bead in at least one of the upper and lower sides of the said holding recessed part.
With such a configuration, the propagation of the pressing force applied to the gripping recess when the container is gripped with a finger in the gripping recess is blocked by the horizontal beads provided above and below, and the surface of the trunk portion is dented. It is possible to effectively avoid the deformation.

Further, the container of the present invention is intermittently along the circumferential direction in a portion that is relatively thin compared to other portions on the mouth side of the barrel portion or on the bottom portion side of the barrel portion. Alternatively, a configuration in which continuous stepped portions are formed can be employed.
With such a configuration, since the waist groove and the grip recess are formed at the center in the height direction, the mouth side and the bottom side of the trunk portion tend to be relatively thin, and there are problems such as sink marks. Even in the container according to the present invention, which is likely to cause the occurrence of sinkage, it is possible to prevent sink marks in the portion that tends to be relatively thin on the mouth side and the bottom side of the trunk.

  As described above, according to the present invention, the container bottom side connection surface (waist portion slope surface) of the waist groove is formed by the finger storage concave portion convex to the container inward side formed in the region including the container bottom side connection surface of the waist groove. The necessary strength and resilience are provided, and even in thin containers with reduced weight, the gripping force applied to the gripping part is reduced by dispersing it in the finger storage recesses, and it is easier to hold and the waist groove It is possible to increase the strength and restoring force of the container bottom side connection surface.

Hereinafter, as an example of a container according to the present invention, an embodiment in which the present invention is applied to a plastic bottle container will be described with reference to the drawings.
Here, FIG. 1 is a front view of the bottle container according to the present embodiment, FIG. 2 is a side view of the bottle container according to the present embodiment, and FIG. 3 is the vicinity of the waist portion of the bottle container according to the present embodiment. An enlarged view shown in FIG. 4 is a cross-sectional view taken along line AA in FIG.

The bottle container 1 shown in these drawings is a plastic bottle container formed by biaxially stretching blow-molding a preform made of a thermoplastic resin, and has a mouth portion 2, a shoulder portion 3, a trunk portion 4, and It has a bottom 5.
In the following description, the height direction refers to a direction along a direction perpendicular to the horizontal plane when the bottle container 1 is placed on the horizontal plane with the mouth portion 2 facing up.

It is preferable that the trunk | drum 4 of the bottle container 1 in this embodiment makes a cross-sectional shape substantially rectangular, and the short side is 110 mm or less. If it does in this way, even if it is a large container with a capacity | capacitance of 2000-3000 ml, while being able to ensure refrigerator storage property, it becomes possible to hold | maintain the bottle container 1 with one hand.
The body 4 may have a substantially square cross-sectional shape. In this case, if the one side is set to 110 mm or less, good refrigerator storage property and handling property can be secured.

A waist portion 6 squeezed along the circumferential direction is formed at substantially the center of the body portion 4 in the height direction.
The waist part 6 is a part having both a reinforcing part function for imparting a necessary strength to the body part 4 and a gripping part function for facilitating handling when the bottle container 1 is held with one hand. 61 and a holding recess 63.

Here, the waist groove 61 refers to a concave groove formed along the circumferential direction of the body portion 4. In this embodiment, the waist groove 61 is provided around the body portion 4, but the bottle container 1 is square. If it is a thing, the waist groove | channel 61 should just be provided in the height direction substantially center of at least 1 set of the mutually opposing surface of the trunk | drum 4. FIG.
Further, a grip recess 63 that is a recess for gripping is formed in the waist groove 61 that is positioned on each of the front surface of the container that is a long side and the back surface of the container. The gripping recess 63 is formed in the center of the width of the waist groove 61 located on each of the front surface and the back surface of the container, and improves the gripability of the bottle container 1 by allowing the fingers to enter when the bottle container 1 is gripped. ing.

  The waist groove 61 of the present embodiment includes a vertical groove bottom surface 61a, a container mouth side connection surface 61b that is located on the container upper side with respect to the groove bottom surface 61a and connects the body 4 and the groove bottom surface 61a, and a groove It has the container bottom part side connection surface 61c which is located in a container lower side with respect to the bottom face 61a, and connects the trunk | drum 4 and the groove bottom face 61a. In the present embodiment, the container mouth side connection surface 61b of the waist groove 61 and the container bottom side connection surface 61c of the waist groove 61 have curved longitudinal sections.

  The gripping recess 63 includes a vertical gripping recess bottom surface 63a, a container port side connection surface 61b of the body 4 or the waist groove 61 positioned on the container upper side with respect to the gripping recess bottom surface 63a, and a gripping recess bottom surface. A container mouth side connection surface 63b for connecting 63a, a container bottom side connection surface 61c of the body part 4 or the waist groove 61 located on the container lower side with respect to the grip recess bottom surface 63a, and a grip recess bottom surface 63a And a container mouth side connection surface 63b.

The finger storage recess 62 is connected to the container bottom side of the waist groove 61 as shown in the figure in order to suppress a decrease in rigidity and resilience of the container bottom side connection surface 61c of the waist groove 61 accompanying the thinning of the bottle container 1. It forms in the area | region containing the surface 61c.
Further, the finger storage recess 62 of the present embodiment is further provided in a region including the container bottom side connection surface 63c of the gripping recess 63.

In other words, as shown in FIG. 3 (b), the finger storage recess 62 is connected to the container bottom side of the container recess side connection surface 63 c located on the container bottom side of the gripping recess 63. The surface 63c and the container bottom side connecting surface 61c of the waist groove 61 are simultaneously provided in a shape cut away by a portion indicated by a chain line in the figure.
The region where the finger storage portion 62 is formed may not be included in the container bottom side connection surface 63 c of the gripping recess 63. Further, the finger storage recess 62 may be provided only on the front side of the container and not provided on the back side of the container.

  The gripping recess 63 and the finger storage recess 62 in the present embodiment configured as described above are an index finger or a middle finger to be inserted into the grip recess 63 and a middle finger or a ring finger to be inserted into the finger storage recess 62 when the bottle container 1 is gripped. Since it is so close that it touches, it is easy to apply a gripping force.

Further, in the illustrated example, the finger storage recess 62 is a curved surface convex toward the inner side of the container, the longitudinal section is an arc shape having a height h of 15 mm and R70, and the lateral width w is 35 mm. The height h is preferably 10 mm to 30 mm, and the longitudinal sectional shape at the center in the width direction of the finger receiving recess 62 is preferably a curved surface having an arc shape of R20 to R120. The lateral width w of the finger storage recess 62 is preferably 20 mm to 50 mm.
In this way, not only the effect is sufficiently exhibited, but also the fit and engagement of the fingers stored in the finger storage recesses 62 are improved while ensuring the strength of the curved surface of the finger storage recesses 62.
In the illustrated example, the lower edge of the finger storage recess 62 is formed in a straight line, but may be curved so as to protrude toward the bottom of the container as necessary.

Moreover, in this embodiment, the container bottom part side connection surface 63c of the holding | grip recessed part 63 consists of two surfaces, the upper side connection surface 63d and the lower side connection surface 63e.
In this way, not only a sufficient effect can be exhibited, but also the container bottom side connection surface 63c of the gripping recess 63 can be reinforced by increasing the number of ridge lines of the container bottom side connection surface 63c of the gripping recess 63.

In the case where the container bottom side connection surface 63c of the gripping recess 63 is composed of two surfaces, the upper connection surface 63d and the lower connection surface 63e, the lower connection surface 63e that is directly connected to the finger storage recess 62 is shown in the figure. It is preferable that the upper edge of the finger storage recess 62 has an arched surface along the belt shape.
As a result, two ridge lines are formed close to each other along the upper edge of the finger receiving recess 62, and the effect of reinforcing the container bottom side connection surface 63c of the gripping recess 63 can be further enhanced. . For this reason, the deformation and buckling of the container bottom side connection surface 63c of the gripping recess 63 can be avoided more effectively, and the degree of finger contact is improved, so that the gripping property of the bottle container 1 is further improved.

  Here, as in the present embodiment, when the lower connection surface 63e is an arch-shaped surface along the strip shape on the upper edge of the finger storage recess 62, in order to obtain the effect sufficiently, The inclination angle θ of the lower connection surface 63e with respect to the horizontal plane is preferably 30 to 65 °. Further, the width L of the lower connection surface 63e (the length between the ridge lines appearing on the surface of the bottle container 1) L may be substantially constant along the longitudinal direction, but in order to ensure the area of the finger storage recess 62 It can also be made narrower toward the center. Although the specific value of the width | variety L of the lower side connection surface 63e is based also on the dimension of the bottle container 1, it is preferable that it is about 2-5 mm, for example.

Further, in the present embodiment, it is preferable that the vertical cross-sectional shape of the upper connection surface 63d that is directly connected to the bottom surface 63a of the gripping recess 63 is a convex curved surface that extends outward from the container.
Thereby, the rigidity and resilience of the upper connection surface 63d itself can be increased with respect to the force with which the index finger or middle finger put into the grip recess 63 presses the upper connection surface 63d, and the container bottom side connection surface of the grip recess 63 can be improved. The deformation and buckling of 63c can be avoided more effectively.
Furthermore, in order to further improve the rigidity and resilience of the upper connection surface 63d itself while improving the tactile sensation when the bottle container 1 is gripped, the upper connection surface 63d has a cross-sectional shape at least in the center in the width direction. It is more preferable that the overall shape of the upper connection surface 63d is a horse-like shape as shown in the figure so as to protrude toward the inside of the container.

  Here, in the present embodiment, a plurality of planar circular projections 90 as shown in the figure are formed on the bottom surface 63a of the gripping recess 63 as a non-slip, but such planar circular projections may have any direction. Therefore, it is preferable because it exhibits a non-slip effect.

  Further, in the present embodiment, as shown in the figure, horizontal beads 71 and 72 are provided above and below the holding recess 63, respectively. Accordingly, the propagation of the pressing force applied to the gripping recess 63 when the finger is put in the gripping recess 63 and the bottle container 1 is gripped by the horizontal beads 71 and 72 provided above and below is blocked. Can be effectively avoided from being dented or deformed.

At this time, in the rectangular container as in the present embodiment, generally, the ridgeline 80 is formed in the vicinity of the corner portion along the height direction to ensure the longitudinal load strength. For this reason, when the horizontal beads 71 and 72 are provided above and below the gripping recess 63, it is preferable that the horizontal beads 71 and 72 do not intersect the ridgeline 80 so that the vertical load strength is not impaired. On the other hand, however, if the end portions of the lateral beads 71 and 72 are too far from the ridgeline 80, the effect of blocking the propagation of the pressing force applied to the gripping recess 63 is impaired.
The dimensions of the horizontal beads 71 and 72 are determined in consideration of these points. Specifically, the distance L1 between the end portions of the horizontal beads 71 and 72 and the ridgeline 80 is 4 to 8 mm. The dimensions of the lateral beads 71, 72 are preferably determined.

  Further, as described above, the bottle container 1 is formed by biaxially stretching blow-molding a preform made of a thermoplastic resin. At this time, as in the present embodiment, the bottle container 1 is approximately at the center in the height direction. When the waist groove 61 and the grip recess 63 are formed, the resin tends to stay at the center, and the mouth 2 side and the bottom 5 side of the body 4 tend to be relatively thin. For this reason, in the mouth part 2 side and the bottom part 5 side of the trunk | drum 4, the problem of sink marks etc. tends to arise in the part which became relatively thin compared with the other part, and there exists a possibility of impairing the external appearance of the bottle container 1. .

  For this reason, in this embodiment, intermittent stepped portions 81a and 81b along the circumferential direction are provided on the mouth portion 4 side of the trunk portion 4, and along the circumferential direction on the bottom portion 5 side of the trunk portion 4. Continuous step portions 82 are respectively formed. As a result, sink marks are prevented from being relatively thin on the mouth part 4 side and the bottom part 5 side of the body part 4, but in the illustrated example, the step part 81a on the mouth part 4 side of the body part 4 is prevented. , 81b is not formed, a sink is likely to occur at a portion indicated by an arrow Y in FIG. 2, and when the step portion 82 on the bottom 5 side of the trunk portion 4 is not formed, an arrow X in FIGS. Sink marks are likely to occur at the site indicated by.

  As described above, in the present embodiment, the example of the rectangular container has been described, but it goes without saying that the present invention can also be applied to a round container. In the case of a rectangular container, the waist groove 61 and the grip recess 63 of the waist 6 are provided on at least one pair of mutually opposing surfaces, and the finger storage recess 62 is formed in a region including the container bottom side connection surface 61c of the waist groove 61. If one place is provided, the container 1 can be gripped, and the effects of finger storage, rigidity, and restoration of the finger storage recess 62 can be exhibited. The waist groove 61 is preferably provided on more surfaces of the body portion 4 in terms of improving the rigidity of the container 1. Also in this case, the gripping recesses 63 may be provided on at least one pair of opposing surfaces, and the finger storage recesses 62 may be provided in at least one place.

In this embodiment, as the thermoplastic resin constituting the bottle container 1, any resin can be used as long as it is a resin that can be stretch blow molded and thermally crystallized.
Specifically, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyarylate, polylactic acid, or thermoplastic polyesters such as copolymers thereof, these resins, or blends with other resins In particular, an ethylene terephthalate thermoplastic polyester such as polyethylene terephthalate is preferably used.
Further, acrylonitrile resin, polypropylene, propylene-ethylene copolymer, polyethylene and the like can also be used.
These resins are blended with various additives such as colorants, ultraviolet absorbers, mold release agents, lubricants, nucleating agents, antioxidants, antistatic agents and the like within a range that does not impair the quality of the molded product. be able to.

The ethylene terephthalate-based thermoplastic polyester constituting the bottle container 1 is the one in which the ethylene terephthalate unit occupies most of the ester repeating units, generally 70 mol% or more, and has a glass transition point (Tg) of 50 to 90 ° C., a melting point ( Those having a Tm) in the range of 200 to 275 ° C are preferred.
As an ethylene terephthalate-based thermoplastic polyester, polyethylene terephthalate (PET) is particularly excellent in terms of pressure resistance, heat resistance, heat pressure resistance, etc. In addition to ethylene terephthalate units, dibasic acids such as isophthalic acid and naphthalenedicarboxylic acid Copolyesters containing a small amount of ester units composed of diols such as propylene glycol can also be used.

Moreover, the bottle container 1 of this embodiment can also be comprised with two or more layers of thermoplastic polyester layers besides the case where it is comprised with a single layer (one layer) thermoplastic polyester layer.
Furthermore, the bottle container 1 of the present embodiment can include a middle layer enclosed between an inner layer and an outer layer made of two or more thermoplastic polyester layers, and the intermediate layer is a barrier layer or an oxygen absorbing layer. be able to. Thus, by providing the barrier layer and the oxygen absorption layer, it is possible to suppress the permeation of oxygen from the outside into the bottle container 1 and to prevent the contents inside the bottle container 1 from being altered by oxygen from the outside. it can.
Here, as the oxygen absorbing layer, any layer can be used as long as it absorbs oxygen and prevents permeation of oxygen, but a combination of an oxidizable organic component and a transition metal catalyst, or substantially It is preferred to use a combination of a gas barrier resin that does not oxidize, an oxidizable organic component and a transition metal catalyst.

  While the present invention has been described with reference to the preferred embodiment, it is needless to say that the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. .

For example, the shape of the container can be cup-shaped, and the container is not limited to a plastic one, but can be applied to a container made of a metal material such as aluminum or a material mainly composed of paper. can do.
Furthermore, the cross-sectional shape of the container is not limited to a substantially rectangular shape or a substantially circular shape, but is a rectangular container or a round container having a substantially rectangular shape, a substantially hexagonal shape, a substantially octagonal shape or a rectangular shape having an even number of sides. It may be.

The present invention is applied to a container having a waist groove substantially in the center of the body in the height direction, and is particularly suitable for a thin plastic bottle container that is reduced in weight.

It is a front view which shows the outline of embodiment of the container which concerns on this invention. It is a side view which shows the outline of embodiment of the container which concerns on this invention. It is an enlarged view which shows the vicinity of the waist part in embodiment of the container which concerns on this invention. It is AA sectional drawing in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bottle container 2 Mouth part 3 Shoulder part 4 Trunk part 5 Bottom part 6 Waist part 61 Waist groove 61a Groove bottom face 61b Container mouth part side connection surface 61c Container bottom part side connection surface 62 Finger accommodation recessed part 63 Grasping recessed part 63a Bottom face 63b Container mouth part side Connection surface 63c Container bottom side connection surface 63d Upper connection surface 63e Lower connection surface 71, 72 Horizontal beads 81a, 81b, 82 Step

Claims (13)

A container having a mouth, a trunk and a bottom,
A waist groove provided with a container mouth side connection surface, a groove bottom surface, a container bottom side connection surface is formed at substantially the center in the height direction of the trunk part,
Forming at least one set of mutually opposing gripping recesses on the waist groove;
At least one finger receiving recess that is located on the bottom side with respect to the waist groove and has a convex curved surface toward the inside of the container is formed in a region including at least the container bottom side connection surface of the waist groove. A container characterized by being. The holding recess includes a container mouth side connection surface and a container bottom side connection surface respectively connected to a bottom surface of the holding recess;
The container according to claim 1, wherein the finger storage recess is provided in a region including a container bottom side connection surface of the grip recess. A square container having a mouth, a trunk and a bottom,
A waist groove provided with a container mouth side connection surface, a groove bottom surface, and a container bottom side connection surface is formed at approximately the center in the height direction of at least one pair of mutually opposing surfaces of the body portion,
Forming at least one set of mutually opposing gripping recesses on the waist groove;
At least one finger receiving recess that is located on the bottom side with respect to the waist groove and has a convex curved surface toward the inside of the container is formed in a region including at least the container bottom side connection surface of the waist groove. A container characterized by being. The holding recess includes a container mouth side connection surface and a container bottom side connection surface respectively connected to a bottom surface of the holding recess;
The container according to claim 3, wherein the finger storage recess is provided in a region including a container bottom side connection surface of the grip recess.   5. The container according to claim 2, wherein the container bottom side connection surface of the gripping recess includes two or more surfaces that are continuous in the height direction.   Of the two or more surfaces forming the container bottom side connection surface of the gripping recess, the surface connected to the finger storage recess is an arch-shaped surface along the belt shape on the upper edge of the finger storage recess. The container according to claim 5.   The container according to claim 6, wherein an inclination angle of the arch-shaped surface with respect to a horizontal plane is 30 to 65 °.   The vertical cross-sectional shape of the surface connected to the bottom surface of the gripping recess among the two or more surfaces forming the container bottom side connection surface of the gripping recess is a convex curved surface toward the outside of the container. Item 8. The container according to Item 6 or 7.   The container according to claim 8, wherein a surface connected to the bottom surface of the gripping concave portion is formed in a horseshoe shape.   5. The container according to claim 2, wherein a height of the finger storage recess is 5 mm to 30 mm, and a vertical cross-sectional shape at a center in the width direction of the finger storage recess is a curved surface having an arc shape.   The container according to claim 10, wherein the finger receiving recess has a lateral width of 20 mm to 50 mm.   The container according to claim 2 or 4, wherein a horizontal bead is provided on at least one of the upper and lower sides of the holding recess.   On the mouth side of the body part or the bottom part side of the body part, an intermittent or continuous step part along the circumferential direction is provided on a part that is relatively thin compared to other parts. The container according to claim 2 or 4, wherein the container is formed.

Images