JP7394687B2 - thin wall container - Google Patents

Description

The present invention relates to thin-walled containers.

A thin-walled container that is used as a container for containing various contents such as food, cosmetics, medicine, etc., and has a cylindrical opening and a body that is connected to the opening and forms a storage space for the contents. Containers are conventionally known. For example, in Patent Document 1 listed below, bent portions extending in the axial direction are provided at both widthwise ends of the body, and when the body is crushed in the thickness direction, the bent portions are attached to the front wall and A synthetic resin container is disclosed in which one of the rear wall portions is configured to serve as a starting point when reversely deforming toward the other side.

JP2018-203296A

However, in the container of Patent Document 1, when the container is crushed and disposed of, there is a risk that the container may be crushed into various shapes depending on the case, and it may be difficult to dispose of the container in a compact manner.

One aspect of the present invention has been made to solve the above-mentioned problems, and one of the objects is to provide a thin-walled container that is easily crushed into a stable shape at the time of disposal.

In order to achieve the above object, a thin-walled container according to one aspect of the present invention includes a cylindrical opening, a shoulder connected below the opening, and a container that is deformable below the shoulder. The trunk includes a body that is connected to each other and forms a storage space for contents, and a bottom that is connected to the bottom of the body. A front wall portion and a rear wall portion each having a flat shape having a long axis and a short axis that intersect with each other on the axis, facing each other in a short axis direction along the short axis, and each having a curved outer peripheral surface; a bent portion connecting the front wall portion and the back wall portion to each other at both ends in the longitudinal direction along the longitudinal axis, and the shoulder portion is separated from the axis along the longitudinal direction. a first connecting portion where the outer circumferential surface of the front wall portion and the shoulder inclined surface are in contact with each other when viewed from the longitudinal direction; and an outer periphery of the rear wall portion. The distance between the surface and the second connecting portion where the shoulder inclined surface is in contact with each other in the short axis direction gradually becomes shorter from above to below.

In one aspect of the present invention, since the body has a flat shape, the container can be opened by pressing the body in a direction in which the front wall and the back wall approach each other along the short axis direction. Can be crushed. Here, the shoulder has a shoulder slope that extends downward as it moves away from the axis along the long axis direction, and the shoulder slope has a shoulder slope where the outer circumferential surface of the front wall and the shoulder slope are in contact when viewed from the long axis direction. The distance between the first connecting portion and the second connecting portion where the outer circumferential surface of the back wall portion and the shoulder slope are in contact with each other in the short axis direction is gradually shortened from above to below. A shoulder with such a configuration does not prevent the torso from collapsing at a position away from the shoulder, but generates a resistance force against the torso's collapse in the vicinity of the shoulder, resulting in large deformation in the short axis direction. will not occur. That is, when an external force is applied to the torso in the short axis direction, the front wall and the back wall are greatly deformed and the central part of the torso in the height direction is crushed, while the shoulder itself is While being displaced as the body collapses, it is possible to generally maintain the shape before application of external force. This makes it possible to provide a thin container that is easy to crush into a stable shape at the time of disposal.

Further, according to the thin-walled container of one aspect of the present invention, when the remaining amount of the contents becomes low, it becomes easy to perform an operation to discharge the contents while supporting the shoulders, and the remaining amount of the contents can be reduced. can be reduced. Further, since the shoulder portion has a predetermined rigidity, it becomes possible to support the container by the shoulder portion, for example, when dispensing the container in an inverted state.

In the thin-walled container according to one aspect of the present invention, each of the front wall portion and the back wall portion extends along the outer circumferential surface at substantially the same height as the lower end of the shoulder inclined surface when viewed from the short axis direction. It may have an upper bent groove portion extending in the longitudinal direction.

According to this configuration, the body of the container can be stably bent at the position where the upper bending groove is formed. Thereby, the overall shape of the container when crushed can be kept approximately constant.

In the thin-walled container according to one aspect of the present invention, the bottom has a bottom inclined surface that extends upward as it moves away from the axis along the long axis direction, and the front wall when viewed from the long axis direction. The distance in the short axis direction between a third connecting portion where the outer circumferential surface of the rear wall portion and the bottom inclined surface are in contact with each other, and a fourth connecting portion where the outer circumferential surface of the rear wall portion and the bottom inclined surface are in contact with each other is such that It may have a shape that gradually becomes shorter toward the top.

According to this configuration, similar to the above-mentioned shoulder part, the bottom part does not inhibit the collapse of the body part, but the bottom inclined surface of the bottom part exerts a resistance against the collapse of the body part, and large deformation in the short axis direction is prevented. It will never occur. In other words, when an external force is applied to the trunk in the short axis direction, the front wall and the back wall are greatly deformed and the central part of the trunk in the height direction is crushed, while the bottom itself is While being displaced as it collapses, it is possible to generally maintain the shape before application of external force. This makes it possible to provide a container that is easily crushed into a stable shape at the time of disposal.

In the thin-walled container according to one aspect of the present invention, each of the front wall portion and the back wall portion extends along the outer circumferential surface at substantially the same height as the upper end of the bottom inclined surface when viewed from the short axis direction. It may have a lower bent groove extending in the longitudinal direction.

According to this configuration, the body of the container can be stably bent at the position where the lower bending groove is formed. Thereby, the overall shape of the container when crushed can be kept approximately constant.

In the thin-walled container according to one aspect of the present invention, the ratio of the average wall thickness of the shoulder portion to the average wall thickness of the body portion may be 150% or more and 300% or less.

According to this configuration, compared to, for example, a case where the wall thickness of the shoulder part is equal to the wall thickness of the body part, the resistance force of the shoulder part against the collapse of the body part can be made larger, so that the shape of the container when it is crushed can be improved. It can be stabilized. Moreover, when the remaining amount of the contents becomes small, it becomes easier to perform the operation of supporting the shoulder portion and discharging the contents, and the remaining amount of the contents can be further reduced. Furthermore, since the shoulder portion has greater rigidity, the container can be more stably supported by the shoulder portion, such as when dispensing the container in an inverted state.

According to one aspect of the present invention, it is possible to provide a thin container that is easily crushed into a stable shape at the time of disposal.

FIG. 1 is a front view of a thin-walled container according to an embodiment of the present invention. FIG. 3 is a side view of the thin-walled container. FIG. 2 is a plan view of a thin-walled container. FIG. 3 is a bottom view of the thin-walled container. FIG. 3 is a side view showing the thin-walled container in a crushed state.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.
Note that the two-dot chain line in FIGS. 3 and 4 indicates the outer shape of the body when it is crushed.

As shown in FIGS. 1 to 3, the thin-walled container 10 of this embodiment includes a cylindrical opening 11, a shoulder 12 connected below the opening 11, and a shoulder 12 connected below the shoulder 12. The body part 13 has a flat body part 13, and a bottom part 14 connected below the body part 13. Since the thin-walled container 10 of this embodiment is formed thin, it is possible to discharge the contents by squeezing.

The thin-walled container 10 can be manufactured, for example, by extrusion blow molding using a cylindrical parison made of an olefin-based synthetic resin such as polypropylene or polyethylene, or a synthetic resin such as polyethylene terephthalate. Therefore, the aforementioned mouth portion 11, shoulder portion 12, body portion 13, and bottom portion 14 are integrally formed from the aforementioned synthetic resin material on the central axis of each portion. Hereinafter, the central axis along which the mouth portion 11, the shoulder portion 12, the body portion 13, and the bottom portion 14 are successively arranged in this order from above to below will be referred to as an axis C. Note that the method for manufacturing the thin-walled container 10 is not limited to the above method, and blow molding methods other than extrusion blow molding may be used, and various manufacturing methods may be employed.

The mouth portion 11 is formed in a cylindrical shape, and an external thread 16 is provided on the outer peripheral surface 11a for attaching a cap (not shown) or the like. The upper end opening 11b of the mouth portion 11 functions as a discharge port for discharging the contents.

As shown in FIG. 3, the body portion 13 is a flat cylinder having a long axis L1 and a short axis L2 that intersect with each other on the axis in a plan view in the vertical direction, that is, in the direction of the axis C along the axis C. exhibits a condition. The body portion 13 is formed to be elastically deformable and has a storage space S therein for contents. Hereinafter, the direction along the axis C will be referred to as the axis C direction, the direction along the long axis L1 will be referred to as the long axis L1 direction, and the direction along the short axis L2 will be referred to as the short axis L2 direction. Further, the dimension of the trunk section 13 in the long axis L1 direction may be referred to as width, and the dimension of the trunk section 13 in the short axis L2 direction may be referred to as thickness.

As shown in FIGS. 1 and 2, the body portion 13 has a front wall portion 18, a back wall portion 19, and a bent portion 20. The front wall part 18 and the back wall part 19 face each other in the short axis L2 direction, and each has curved outer peripheral surfaces 18a and 19a. The bent portion 20 connects the front wall portion 18 and the back wall portion 19 at both ends in the long axis L1 direction, and extends in the axis C direction.

As shown in FIG. 3, the body portion 13 has a front wall portion 18 and a rear wall portion 19 that have the same shape and are arranged opposite to each other, and are symmetrical with respect to a plane passing through the axis C and the long axis L1. It has a shape. Further, the body portion 13 has a shape that is symmetrical also with respect to a plane passing through the axis C and the short axis L2. That is, the body portion 13 has a shape that is symmetrical about the axis C in the front-rear direction and the left-right direction. This makes it easy to crush the trunk 13 evenly in the front-rear direction and left-right direction. Note that the trunk portion 13 may have an asymmetric shape in at least one of the front-rear direction and the left-right direction.

In plan view from the axis C direction, a tangent F1 to the front wall 18 starting from the apex P of the bending part 20 and a tangent F2 to the back wall 19 starting from the apex P of the bending part 20. The angle θ is preferably in the range of 70° to 140°. When the angle θ between the tangents F1 and F2 is smaller than 70°, it becomes difficult to form the shoulder while maintaining rigidity. Further, the flatness of the body portion 13 is preferably in the range of 1.2 to 1.8. Note that the flatness of the body 13 is a value indicated by the ratio of the maximum width W of the body 13 to the maximum thickness T of the body 13. That is, the flatness is expressed as W/T. When the above numerical range is satisfied, it is easy to crush the front wall portion 18 and the back wall portion 19 in the short axis L2 direction without any problem.

The shoulder portion 12 is connected to the mouth portion 11 and the body portion 13. As shown in FIG. 1, the shoulder portion 12 has a shoulder inclined surface 22 that extends downward as it moves away from the axis C along the long axis L1 direction. Further, as shown in FIG. 2, when viewed from the direction of the long axis L1, the connecting portion formed by the ridgeline where the outer circumferential surface 18a of the front wall portion 18 and the shoulder inclined surface 22 touch is referred to as a first connecting portion R1, and The connecting portion formed by the ridge line where the outer circumferential surface 19a of the portion 19 and the shoulder inclined surface 22 are in contact is called a second connecting portion R2, and the connecting portion formed by the ridge line where the upper surface 12a of the shoulder portion 12 and the shoulder inclined surface 22 are in contact is called a second connecting portion R2. When referred to as the upper connecting portion RA, the shoulder inclined surface 22 surrounded by the first connecting portion R1, the second connecting portion R2, and the upper connecting portion RA is such that each of the first connecting portion R1 and the second connecting portion R2 is It has an approximately isosceles triangular shape that bulges out slightly downward. That is, the distance D1 between the first connecting portion R1 and the second connecting portion R2 in the short axis L2 direction has a shape that gradually becomes shorter from the top to the bottom. Furthermore, when viewed from the direction of the short axis L2 , the shoulder inclined surface 22 is curved with a slightly downwardly convex shape at the central portion.

Each of the front wall portion 18 and the rear wall portion 19 has an upper bent groove portion 24 extending in the long axis L1 direction along the outer peripheral surfaces 18a and 19a at approximately the same height as the lower end of the shoulder inclined surface 22. There is. The upper bent groove portion 24 is constituted by a groove portion recessed from the outer peripheral surface side of each wall portion 18, 19 toward the inner peripheral surface side. The heightwise position of the upper bent groove part 24 does not have to completely match the heightwise position of the lower end of the shoulder inclined surface 22, and may be slightly shifted.

As shown in FIG. 1, the bottom portion 14 has a bottom inclined surface 26 that extends upward as it moves away from the axis C along the long axis L1 direction. Further, as shown in FIG. 2, when viewed from the direction of the long axis L1, the connecting portion formed by the ridgeline where the outer circumferential surface 18a of the front wall portion 18 and the bottom inclined surface 26 touch is referred to as a third connecting portion R3, and the rear wall portion The connecting portion consisting of the ridge line where the outer circumferential surface 19a of No. 19 and the bottom inclined surface 26 touch is referred to as the fourth connecting portion R4, and the connecting portion consisting of the ridge line where the ground plane 14b and the bottom inclined surface 26 touch is referred to as the lower connecting portion RB. Then, the bottom inclined surface 26 surrounded by the third connecting part R3, the fourth connecting part R4, and the lower connecting part RB is such that each of the third connecting part R3 and the fourth connecting part R4 slightly bulges upward. It has a substantially isosceles triangular shape. That is, the distance D2 between the third connecting portion R3 and the fourth connecting portion R4 in the short axis L2 direction has a shape that gradually becomes shorter from the bottom to the top. Further, the bottom inclined surface 26 is formed to have a smaller area than the shoulder inclined surface 22.

Each of the front wall portion 18 and the rear wall portion 19 has a lower bent groove portion 28 extending in the long axis L1 direction along the outer peripheral surfaces 18a and 19a at approximately the same height as the upper end of the bottom inclined surface 26. There is. The lower bent groove portion 28 is constituted by a groove portion recessed from the outer circumferential surface side of each wall portion 18 and 19 toward the inner circumferential surface side. The heightwise position of the lower bent groove portion 28 does not have to completely match the heightwise position of the upper end of the bottom inclined surface 26, and may be slightly shifted.

As shown in FIG. 4, the bottom part 14 includes a grounding part 30 having a grounding surface 14b, a raised bottom part 31 recessed inside the grounding part 30, and a rib 32 extending in the longitudinal direction. There is.

In the case of this embodiment, the average thickness of the shoulder portion 12 is thicker than the average thickness of the body portion 13. As an example of specific numerical values, the body part 13 has a wall thickness of 0.2 mm or more and 0.4 mm or less, the shoulder part 12 has a wall thickness of 0.4 mm or more and 0.7 mm or less, and It is desirable that the ratio of the average thickness of the shoulder portion 12 to the average thickness of the portion 13 be 150% or more and 300% or less. By setting the wall thickness of the body portion 13 within the above range, the volume of the container can be easily reduced, and by setting the wall thickness of the shoulder portion 12 within the above range, appropriate rigidity can be obtained. Furthermore, by setting the ratio of the average wall thickness of the shoulder portion 12 to the average wall thickness of the body portion 13 within the above range, the difference in wall thickness between the body portion 13 and the shoulder portion 12 can be maintained appropriately, and stable moldability can be achieved. can get. Further, the thickness of the bottom portion 14 is set to be 0.2 mm or more and 0.4 mm or less, similarly to the body portion 13. More specifically, in this embodiment, the thickness of the shoulder portion 12 is 0.42 mm, the thickness of the body portion 13 is 0.23 mm, and the thickness of the bottom portion 14 is 0.27 mm. The ratio of the average wall thickness of the shoulder portion 12 to the average wall thickness of the body portion 13 is 182.6%.

Since the thin-walled container 10 configured as described above has a flat body, when using the thin-walled container 10, the front wall 18 and the back wall 19 are aligned in the direction of the short axis L2, that is, the body 13 The contents can be discharged from the upper end opening 11b of the mouth portion 11 by pinching the body portion 13 from the front and back directions and crushing the body portion 13 in the thickness direction.

In the case where a conventional thin-walled container is not provided with a shoulder slope and a bottom slope as in this embodiment, it is difficult to crush the thin-walled container into a thin and regular shape even if the thin-walled container is crushed at the time of disposal. Depending on the degree of crushing, it may be crushed into various shapes. Furthermore, it is difficult to crush the front wall and the back wall so that they become substantially flat, and there is a risk that a large amount of the contents will remain.

On the other hand, in the thin-walled container 10 of the present embodiment, the shoulder portion 12 has a shoulder inclined surface 22 that extends downward as it moves away from the axis C along the long axis L1 direction, and when viewed from the long axis L1 direction, A short distance between a first connecting portion R1 where the outer circumferential surface 18a of the front wall portion 18 and the shoulder inclined surface 22 are in contact, and a second connecting portion R2 where the outer circumferential surface 19a of the rear wall portion 19 and the shoulder inclined surface 22 are in contact with each other. It has a shape in which the distance D1 in the direction of the axis L2 gradually becomes shorter from the top to the bottom. The shoulder portion 12 having such a configuration does not inhibit the collapse of the body portion 13 in the thickness direction, while the shoulder portion 12 itself exerts a resistance force against the collapse of the body portion 13 in the thickness direction. No major deformation occurs.

That is, by applying an external force to the trunk 13 in the short axis L2 direction, the front wall 18 and the rear wall 19 are greatly deformed, as shown in FIG. The body part 13 can be crushed to become substantially flat from the upper part near the shoulder part 12. Furthermore, in the case of this embodiment, the bottom part 14 also has a bottom inclined surface 26 that extends upwardly as it moves away from the axis C along the long axis L1 direction, like the shoulder part 12, and the bottom inclined surface 26 is connected to the third connection. The distance D2 between the portion R3 and the fourth connecting portion R4 in the direction of the short axis L2 gradually becomes shorter from the bottom to the top. Therefore, the bottom part 14 also has the same effect as the shoulder part 12, and can be crushed so that the body part 13 becomes substantially flat from the central part of the body part 13 in the height direction to the lower part near the bottom part 14. .

In this manner, in the present embodiment, most of the body 13 can be crushed substantially flat from the upper part to the lower part. Therefore, it is possible to provide a thin container 10 that is stable in its thin shape and is easy to crush. Thereby, the thin-walled container 10 after use can be disposed of efficiently and compactly.

Further, according to the present embodiment, since the shoulder portion 12 has a certain degree of rigidity, when the remaining content becomes low, for example, the shoulder portion 12 is supported by the index finger, and the body portion 13 is supported by the shoulder portion with the thumb. It becomes easier to push it to the 12 side and discharge the contents. Particularly in the case of this embodiment, since the central part of the shoulder inclined surface 22 is curved downward in a convex shape when viewed from the direction of the short axis L2 , when reducing the volume of the thin-walled container 10 to reduce the contents, You can easily support it by placing your index finger on the downwardly curved part. This allows the amount of remaining content to be reduced and the content to be fully used up. Further, by improving the rigidity of the shoulder portion 12, it becomes possible to support the thin-walled container 10 by the shoulder portion 12, for example, when the thin-walled container 10 is placed in an inverted state and the contents are to be discharged.

Here, the relationship between the dimensions of each part that tends to flatten the body 13 will be described below.
As shown in FIG. 3, the dimension from the axis C to the apex P of the bent portion 20 when the body 13 is crushed is f1, and the circumference of the body 13 when the body 13 is crushed is f2. , from the point Q (the center of each wall 18, 19) where each wall 18, 19 and the short axis L2 intersect when the front wall 18 and rear wall 19 are viewed in plan to the apex P of the bent portion 20. The arc length of is c1, the dimension from the axis C to the outer peripheral surface of the mouth 11 is a1, and the dimension from the outer peripheral surface of the mouth 11 to the vertex P of the bent part 20 in a state where the trunk 13 is crushed is a2. As shown in FIG. 2, when the lengths of the first connecting portion R1 and the second connecting portion R2 are a3, if the following equations (1) and (2) are satisfied, then as shown in FIG. In addition, the upper part of the body part 13 can be flattened when viewed from the direction of the long axis L1.
f1=c1=a1+a2...(1)
f2=a3...(2)

Regarding the bottom part 14, as shown in FIG. 4, the dimension from the axis C to the end of the ground plane 14b in the long axis L1 direction is b1, and the body part 13 is pushed from the end of the ground plane 14b in the long axis L1 direction. The dimension to the apex of the bent portion 20 in the collapsed state is defined as b2, and the point Q where each of the walls 18 and 19 intersects the short axis L2 (each wall When the arc length from the center of portions 18 and 19 to the end of the ground plane 14b is b4, and as shown in FIG. 2, the lengths of the third connecting portion R3 and the fourth connecting portion R4 are b3, the following If the equations (3) and (4) are satisfied, the lower part of the body 13 can be flattened when viewed from the long axis L1 direction, as shown in FIG.
f1=c1=b1+b2...(3)
f2=b3+b4...(4)

In this embodiment, each of the front wall part 18 and the back wall part 19 has an upper bent groove extending in the long axis L1 direction along the outer peripheral surfaces 18a and 19a at approximately the same height as the lower end of the shoulder inclined surface 22. 24, the body portion 13 can be stably bent at the position where the upper bending groove portion 24 is formed, as shown in FIG. Further, each of the front wall portion 18 and the back wall portion 19 is provided with a lower bent groove portion 28 extending in the long axis L1 direction along the outer circumferential surfaces 18a, 19a at approximately the same height as the upper end of the bottom inclined surface 26. Therefore, the body portion 13 can be stably bent at the position where the lower bending groove portion 28 is formed. Thereby, the shape of the thin-walled container 10 when crushed can always be kept substantially constant.

Further, in the present embodiment, since the ratio of the average thickness of the shoulder portion 12 to the average thickness of the body portion 13 is 150% or more and 300% or less, the thickness of the shoulder portion 12 is the same as the thickness of the body portion 13. Compared to the case where the thickness is equal, the rigidity of the shoulder portion 12 is further improved, and the resistance force of the shoulder portion 12 against the crushing of the body portion 13 can be increased. Therefore, the shape of the thin-walled container 10 when crushed can be made more stable. Further, by further improving the rigidity of the shoulder portion 12, the above-mentioned operation of pushing in the body portion 13 when the remaining amount of contents becomes small becomes easier to perform. This allows the amount of remaining content to be reduced and the content to be fully used up.

Note that the technical scope of the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention.
In the above embodiment, an example is given of the thin-walled container 10 in which the contents are discharged by squeezing, but the present invention is not limited to this type of container, but can be applied to containers in which the contents are discharged by a dispenser such as a pump. Good too. The present invention may be applied to a container in which a pump is disposed at the mouth and, for example, the container is discharged in an inverted state. In the case of a container equipped with this type of pump, the pump can be removed at the end to reduce the remaining amount, and the contents can be discharged while reducing the volume of the container.

Further, the container of the present invention may be used while being supported in an inverted state. When used while being supported in an inverted state, for example, the mouth may be supported by two bar-shaped supports extending in parallel with the mouth protruding downward from the bar-shaped supports, or the thumb and index finger may be supported. You may adopt the form which supports by the part between (first finger|toe space). When the container is supported between the thumb and index finger, the contents may be discharged using a pump, for example. A simple pump can also be used as the pump. In the case of the present invention, since the rigidity of the shoulder portion 12 is improved, it becomes possible to support the container more stably by the shoulder portion when the container is desired to be used in an inverted state as described above.

For example, in the above embodiment, the thin-walled container 10 is illustrated as having all of the shoulder inclined surface 22, the bottom inclined surface 26, the upper bending groove 24, and the lower bending groove 28, but among these components, the bottom The inclined surface 26, the upper bending groove 24, and the lower bending groove 28 do not necessarily have to be provided. Furthermore, the upper bending groove 24 and the lower bending groove 28 do not necessarily have to be composed of a single continuous groove as in the above embodiment, but may include a plurality of interrupted grooves or a plurality of recesses. It may be composed of.

In addition, the dimensions, wall thickness, shape, arrangement, etc. of various constituent elements of the container are not limited to the above embodiments, and can be modified as appropriate.

10 Thin-walled container 11 Mouth 12 Shoulder 13 Body 14 Bottom 18 Front wall 18a Outer surface 19 Back wall 19a Outer surface 20 Bent portion 22 Shoulder slope 24 Upper bent groove 26 Bottom slope 28 Lower bend Groove C Axis D1 Interval D2 Interval L1 Long axis L2 Short axis R1 First ridge R2 Second ridge R3 Third ridge R4 Fourth ridge S Accommodation space

Claims (5)

a cylindrical mouth;
a shoulder portion connected below the mouth portion;
a body part that is deformably connected below the shoulder part and forms a storage space for contents;
a bottom portion continuous to the lower part of the body;
Equipped with
The body has a flat shape having a long axis and a short axis that intersect with each other on the axis of the body in a plan view from above and below,
A front wall portion and a rear wall portion that face each other in the short axis direction along the short axis and each have a curved outer circumferential surface;
a bent portion that connects the front wall portion and the back wall portion at both ends in the long axis direction along the long axis,
The shoulder has a shoulder slope that extends downward as it moves away from the axis along the long axis direction, and when viewed from the long axis direction, the shoulder slope is connected to the outer circumferential surface of the front wall. The distance in the short axis direction between the first connecting portion where the surface contacts the first connecting portion and the second connecting portion where the outer circumferential surface of the back wall portion contacts the shoulder slope gradually becomes shorter from the top to the bottom. has a shape,
The thin-walled container has a central portion of the shoulder inclined surface curved downward in a convex shape when viewed from the short axis direction . According to claim 1, each of the front wall portion and the back wall portion has an upper bent groove portion extending in the longitudinal direction along the outer circumferential surface at approximately the same height as the lower end of the shoulder inclined surface. Thin-walled container as described. The bottom has a bottom inclined surface that extends upward as it moves away from the axis along the long axis direction, and when viewed from the long axis direction, the outer circumferential surface of the front wall and the bottom inclined surface are different from each other. The distance in the short axis direction between the third connecting portion in contact and the fourth connecting portion in contact with the outer circumferential surface of the rear wall portion and the bottom inclined surface has a shape that gradually decreases from the bottom to the top. The thin-walled container according to claim 1 or claim 2. According to claim 3, each of the front wall part and the back wall part has a lower bent groove part extending in the longitudinal direction along the outer circumferential surface at approximately the same height as the upper end of the bottom inclined surface. Thin-walled container as described. The thin-walled container according to any one of claims 1 to 4, wherein the ratio of the average wall thickness of the shoulder portion to the average wall thickness of the body portion is 150% or more and 300% or less.

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