Container manufacturing method and manufacturing device

Abstract

To provide a container which can be easily manufactured even though it includes a cylindrical member having flexibility.SOLUTION: A container includes: a bottom surface member; a top surface member; a cylindrical member joined to the bottom surface member and the top surface member and having flexibility; and a mouth part provided at the top surface member. The bottom surface member and the top surface member have rigidity. The bottom surface member includes: a substrate; and a protrusion part, protruding from the side of the substrate opposite to the side that faces the mouth part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention is vessel The present invention relates to a manufacturing method and a manufacturing apparatus. [Background technology]

[0002] Conventionally, containers have been required to be able to be reduced in volume in order to make effective use of resources or reduce waste, and containers comprising a flexible tubular member made of soft film and a bottom member have been widely distributed.

[0003] For example, Patent Document 1 discloses a pouch container comprising a container body made of a flexible film having a cylindrical body and a bottom that closes the lower opening of the body, and a spout fused and fixed to the upper end of the body. It also describes how the body with the spout attached is loaded in an upside-down, unfolded state into a bottom attachment jig, and a bottom forming film is fused to the joint of the body to obtain the pouch container. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-244619 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the case of conventional containers, when attaching the bottom during the container manufacturing process, the body must be inverted and held in an inverted position by a bottom attachment jig, and after the bottom is attached to the body, the position must be changed from the inverted position to an upright position. Also, because the body is flexible, a bottom attachment jig is required to support the body. Therefore, containers with flexible cylindrical members have the disadvantage that their manufacturing is complicated.

[0006] In view of the above, an object of one aspect of the present invention is to provide a container that can be easily manufactured even if it includes a flexible tubular member. [Means for solving the problem]

[0007] A container according to one aspect of the present invention comprises a bottom member, a top member, a flexible tubular member joined to the bottom member and the top member, and a mouth portion provided on the top member, wherein the bottom member and the top member are rigid, and the bottom member has a substrate and a convex portion protruding from the surface of the substrate opposite the surface facing the mouth portion. [Effects of the Invention]

[0008] According to one aspect of the present invention, the container can be easily manufactured even if it includes a flexible cylindrical member. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a cross-sectional view of a container according to one embodiment. [Figure 2] FIG. 1 is an exploded perspective view of a container according to one embodiment. [Figure 3] FIG. 2 is a perspective view of the bottom member as seen from the underside. [Figure 4] FIG. 2 is a perspective view of the bottom member as seen from the top side. [Figure 5A] 1A to 1C are diagrams showing a method for manufacturing a container according to one embodiment (part 1). [Figure 5B] 10A to 10C are diagrams showing a method for manufacturing a container according to an embodiment (part 2). [Figure 5C] 10A to 10C are diagrams showing a method for manufacturing a container according to an embodiment (part 3). DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0011] <Container> Figure 1 is a cross-sectional view of a container 100 according to one embodiment. Figure 2 is an exploded perspective view of the container 100 according to one embodiment.

[0012] 1 and 2, the container 100 includes a bottom member 1, a top member 2, a cylindrical member 3 joined to the bottom member 1 and the top member 2, and a mouth portion 4 provided on the top member 2. In this specification, the top member 2 side may be referred to as the top and the bottom member 1 side as the bottom, but this does not limit the orientation of the container 100 when in use.

[0013] The container 100 is self-supporting. Here, self-supporting means the ability to stand on its own when not filled with a content. When the container 100 is made to stand on its own, the top surface member 2 is on the upper side and the bottom surface member 1 is on the lower side.

[0014] The contents contained in the container 100 according to this embodiment are not particularly limited and may be, for example, a liquid, a solid, a powder, a granule, or a mixture of one or more of these. Specific examples of the contents include beverages, food products, seasonings, cosmetics, medicines, detergents, adhesives, household goods, industrial products, etc.

[0015] The shape of the tubular member 3 may be cylindrical. The shape of the tubular member 3 can be any shape depending on the shapes of the bottom member 1 and the top member 2, and may be, for example, a square tube shape or a shape that transitions from a cylindrical shape to a square tube shape.

[0016] The cylindrical member 3 is flexible. Because the cylindrical member 3 is flexible, when the container 100 is disposed of, the cylindrical member 3 can be easily compressed, and the volume of the container 100 can be easily reduced. Furthermore, when the container is collected for recycling as a resource, it can be collected efficiently.

[0017] The cylindrical member 3 is not particularly limited, and may be formed, for example, from a film. Specifically, the cylindrical member 3 may be formed from a laminated film including a sealant layer, a barrier layer, and a base layer. The sealant layer is the innermost layer of the container 100, the barrier layer is provided on the outer peripheral surface of the sealant layer, and the base layer is provided on the outer peripheral surface of the barrier layer. Furthermore, an outermost layer formed from a thermoplastic resin such as polyethylene may be provided on the outside of the base layer.

[0018] The material constituting the sealant layer is preferably a polyolefin resin such as polyethylene (PE) or polypropylene (PP). The barrier layer may include a metal layer formed of, for example, aluminum. Specifically, the barrier layer may be an aluminum foil or an aluminum-deposited film. The material constituting the base layer may be, for example, nylon (aliphatic polyamide).

[0019] The thickness of the cylindrical member 3 is preferably 150 μm to 350 μm, and more preferably 200 μm to 300 μm. When the thickness of the cylindrical member 3 is 150 μm to 350 μm, the cylindrical member 3 can be compressed more easily. The thickness of the cylindrical member 3 is preferably smaller than both the thickness of the top surface member 2 and the thickness of the bottom surface member 1. When the thickness of the cylindrical member 3 is smaller than both the thickness of the top surface member 2 and the thickness of the bottom surface member 1, the cylindrical member 3 can be compressed more easily, and the volume of the container 100 can be reduced more easily. In addition, the amount of raw material used for the container 100 can be reduced, which contributes to reducing waste.

[0020] The weight of the cylindrical member 3 is preferably lighter than both the weight of the top surface member 2 and the weight of the bottom surface member 1. When the weight of the cylindrical member 3 is lighter than both the weight of the top surface member 2 and the weight of the bottom surface member 1, the weight of the entire container 100 can be reduced.

[0021] The top surface member 2 may be joined to the tubular member 3 by overlapping the inner surface of the lower end (the end opposite the mouth portion 4) with the outer surface of the tubular member 3, or may be joined to the tubular member 3 by overlapping the outer surface of the lower end with the inner surface of the tubular member 3.

[0022] The shape of the top surface member 2 may be such that it widens from the lower end of the mouth portion 4 (the end portion on the bottom surface member 1 side). In the example shown in Figures 1 and 2, the shape of the top surface member 2 is such that it widens from the lower end of the mouth portion 4, but this is not limited thereto and it may be, for example, substantially planar. In other words, the top surface member 2 may extend parallel to the bottom surface member 1 from the lower end of the mouth portion 4. The shape of the top surface member 2 in a planar view is not particularly limited, but may be a circle, an ellipse, a polygon (triangle, rectangle, pentagon, hexagon, heptagon, octagon, etc.), etc. If the shape of the top surface member 2 in a planar view is polygonal, the corners may be rounded.

[0023] The top surface member 2 has rigidity. The rigidity of the top surface member 2 allows the top surface member 2 to be held by a holding unit 71, which will be described later, in the manufacturing method of the container 100. Therefore, even if the tubular member 3 is flexible, the container 100 can be held in an upright position. Even if the container 100 includes a flexible tubular member 3, the container 100 can be easily manufactured. Furthermore, typically, when a flexible tubular member deforms, the balance of the entire container is lost and it becomes unstable. However, in the container 100 of this embodiment, the rigidity of the top surface member 2 allows the tubular member 3 to maintain its initial shape even when the contents decrease and the flexible tubular member 3 loses tension, making it prone to deformation. Therefore, the container 100 can stand stably and independently, and maintains its beautiful appearance until the contents are gone.

[0024] Specifically, the top surface member 2 has higher rigidity than the cylindrical member 3. Because the top surface member 2 has higher rigidity than the cylindrical member 3, the top surface member 2 can be held by the holding portion 71 in the manufacturing method of the container 100. Therefore, even if the cylindrical member 3 is flexible, the container 100 can be held in an upright position, and the container 100 including the flexible cylindrical member 3 can be easily manufactured. Furthermore, the container 100 can stand on its own stably, and furthermore, the beautiful appearance can be maintained until the contents are used up.

[0025] In the method of manufacturing the container 100, the top surface member 2 preferably has enough rigidity to withstand deformation due to an external force applied from a holding portion 71 when the top surface member 2 is held by the holding portion 71, which will be described later.

[0026] The material constituting the top surface member 2 is not particularly limited, but examples thereof include organic materials such as thermoplastic resins, thermosetting resins, and wood; inorganic materials such as metals, glass, and ceramics; and composite materials of two or more of these. Of these, the material constituting the top surface member 2 is preferably a hard resin. Examples of resins include polyolefin resins such as polyethylene (PE) and polypropylene (PP), and polyester resins such as polyethylene terephthalate (PET). When the material constituting the top surface member 2 is a resin, the top surface member 2 can be produced by, for example, injection molding, compression molding, blow molding, extrusion molding, pressure molding, or draw molding.

[0027] The thickness of the top surface member 2 is preferably 0.5 mm to 2.5 mm, and more preferably 1 mm to 1.5 mm. The thickness of the top surface member 2 is preferably smaller than the thickness of the bottom surface member 1. When the thickness of the top surface member 2 is smaller than the thickness of the bottom surface member 1, the container 100 can stand on its own more stably.

[0028] The weight of the top surface member 2 is preferably lighter than the weight of the bottom surface member 1. When the weight of the top surface member 2 is lighter than the weight of the bottom surface member 1, the center of gravity of the container 100 can be lowered, and the container 100 can stand on its own more stably.

[0029] The mouth portion 4 is formed in a cylindrical shape. A male screw 41 is formed on the outer peripheral surface of the mouth portion 4. A cap that seals the mouth portion 4 can be attached to the mouth portion 4, for example, the cap having a female screw (not shown) that screws onto the male screw 41. The cap may have a pump that dispenses the contents. The mouth portion 4 may be molded integrally with the top surface member 2, or may be molded as a separate member. The material that constitutes the mouth portion 4 can be the same as that of the top surface member 2.

[0030] The bottom member 1 is molded separately from the cylindrical member 3, and closes the opening 3b at the lower end 3a (the end opposite to the joint with the top member 2) of the cylindrical member 3. The bottom member 1 closes the opening 3b at the lower end 3a of the cylindrical member 3 by joining the outer peripheral wall 14 of the bottom member 1 to the inner peripheral surface of the cylindrical member 3 by heat sealing or the like.

[0031] The shape of the bottom surface member 1 in a plan view is not particularly limited, but examples thereof include a circle, an ellipse, a polygon (triangle, rectangle, pentagon, hexagon, heptagon, octagon, etc.), etc. When the shape of the bottom surface member 1 in a plan view is a polygon, the corners may be rounded.

[0032] The bottom surface member 1 has rigidity. Because the bottom surface member 1 has rigidity, the bottom surface can be supported by the support portion 72 described below in the step (first step) of attaching the bottom surface member 1 to the cylindrical member 3. Therefore, even if the container 100 is provided with a flexible cylindrical member 3, the bottom surface member 1 can be easily attached to the cylindrical member 3, and the container 100 can be easily manufactured. Furthermore, even if the contents decrease and the flexible cylindrical member 3 loses tension and becomes prone to deformation, the initial shape of the cylindrical member 3 can be maintained. Therefore, the container 100 can stand on its own stably.

[0033] Specifically, it is preferable that the bottom surface member 1 has a rigidity that can withstand deformation due to its own weight when the bottom surface is supported by a support portion 72, which will be described later, in the step (first step) of attaching the bottom surface member 1 to the cylindrical member 3. It is also preferable that the bottom surface member 1 has a higher rigidity than the top surface member 2. Because the bottom surface member 1 has a higher rigidity than the top surface member 2, the container 100 can stand on its own more stably.

[0034] Since the top surface member 2 and the bottom surface member 1 are rigid and the tubular member 3 is flexible, when it is time to dispose of the product, the tubular member 3 can be easily compressed by pinching and crushing the tubular member 3 between the top surface member 2 and the bottom surface member 1.

[0035] The thickness of the bottom surface member 1 is preferably 2 mm to 6 mm, and more preferably 4 mm to 5 mm. When the thickness is not uniform, such as when it varies in the surface direction, the thickness refers to the maximum value. By making the thickness of the bottom surface member 1 2 mm to 6 mm, deformation of the bottom surface member 1 can be suppressed even when the bottom surface is supported by the support portion 72 in the step (first step) of attaching the bottom surface member 1 to the cylindrical member 3.

[0036] The thickness of the bottom surface member 1 is preferably greater than the thickness of the top surface member 2. By making the thickness of the bottom surface member 1 greater than the thickness of the top surface member 2, the container 100 can stand on its own more stably. Furthermore, the weight of the bottom surface member 1 is preferably greater than the weight of the top surface member 2. By making the weight of the bottom surface member 1 heavier than the weight of the top surface member 2, the center of gravity of the container 100 can be lowered, and the container 100 can stand on its own more stably.

[0037] The bottom member 1 can be made of the same material as the top member 2. The material making up the bottom member 1 is preferably a hard resin. When the material making up the bottom member 1 is a resin, the bottom member 1 can be produced by, for example, injection molding, compression molding, blow molding, extrusion molding, pressure molding, draw molding, or the like.

[0038] FIG. 3 is a perspective view of the bottom surface member 1 as viewed from the bottom surface side. As shown in FIG. 3, the bottom surface member 1 has a substrate 11 and a protrusion 13a protruding from a bottom surface 11a of the substrate 11 (the surface opposite to the surface facing the opening portion 4). The shape of the substrate 11 may be a disk. The thickness of the substrate 11 is preferably 1 mm to 3 mm, and more preferably 1.5 mm to 2 mm. By having the thickness of the substrate 11 be 1 mm to 3 mm, deformation of the bottom surface member 1 can be suppressed even when the bottom surface is supported by the support portion 72 in the step (first step) of attaching the bottom surface member 1 to the cylindrical member 3.

[0039] The protrusion 13a is a member for engaging the support portion 72, which will be described later, in the step (first step) of attaching the bottom member 1 to the cylindrical member 3. Typically, the diameter of the opening 3b of the cylindrical member 3 is the same as or smaller than the diameter of the bottom member 1, making it difficult to fit the bottom member 1 into the opening 3b of the cylindrical member 3. In particular, in the case of a flexible cylindrical member 3, the shape of the opening 3b of the cylindrical member 3 is easily deformed, making it more difficult to fit the bottom member 1 into the opening 3b of the cylindrical member 3. The bottom member 1 of this embodiment has the protrusion 13a, which allows the bottom member 1 to be engaged with the support portion 72 and allows the bottom member 1 to be held at an angle relative to the central axis 10 of the cylindrical member 3. When the bottom member 1 is held at an angle relative to the central axis 10 of the cylindrical member 3, the bottom member 1 can be easily fitted into the opening 3b of the cylindrical member 3. Therefore, even if the container 100 includes a flexible cylindrical member 3, the bottom member 1 can be easily attached to the cylindrical member 3 in an upright position, and the container 100 can be easily manufactured.

[0040] The protrusions 13a are preferably ribs (lower surface peripheral ribs) formed perpendicular to the substrate 11 on the periphery of the lower surface 11a of the substrate 11. When the protrusions 13a are lower surface peripheral ribs formed perpendicular to the substrate 11 on the periphery of the substrate 11, corners are formed between the lower surface 11a of the substrate 11 and the protrusions (lower surface peripheral ribs) 13a. Therefore, in the step (first step) of attaching the bottom member 1 to the tubular member 3, the support portions 72 can be engaged with the corners, and the bottom member 1 can be hooked onto the support portions 72 and easily held at an angle with respect to the central axis 10 of the tubular member 3. Therefore, even if the container 100 includes a flexible tubular member 3, the container 100 can be manufactured more easily.

[0041] The convex portion (lower surface peripheral rib) 13a is preferably formed around the entire periphery of the substrate 11. By forming the convex portion (lower surface peripheral rib) 13a around the entire periphery of the substrate 11, the support portion 72 can be locked at any position in the circumferential direction of the bottom surface member 1 in the step (first step) of attaching the bottom surface member 1 to the tubular member 3, and therefore the bottom surface member 1 can be easily aligned with the support portion 72. Therefore, even if the container 100 includes a flexible tubular member 3, it can be manufactured more easily.

[0042] Furthermore, in the process (first process) of attaching the bottom member 1 to the tubular member 3, if the two support portions 72 are arranged at positions that are rotationally symmetric with respect to the center of the substrate 11, the bottom member 1 can be fixed and held at an angle to the central axis 10 of the tubular member 3 by pressing the convex portions (lower surface peripheral ribs) 13a from the inside to the outside by each support portion 72.

[0043] The convex portion (lower surface peripheral rib) 13a may be formed on a part of the periphery of the substrate 11, and for example, two convex portions (lower surface peripheral ribs) 13a may be provided at positions that are two-fold rotationally symmetric about the center of the substrate 11. This allows the support portion 72 to be locked to one of the two convex portions (lower surface peripheral ribs) 13a in the step (first step) of attaching the bottom member 1 to the tubular member 3. Furthermore, if two support portions 72 of different lengths are provided at positions corresponding to the two convex portions (lower surface peripheral ribs) 13a, the bottom member 1 can be fixed and held at an angle with respect to the central axis 10 of the tubular member 3 by pressing the two convex portions (lower surface peripheral ribs) 13a from the inside outward with the support portions 72.

[0044] The shape of the convex portion (lower surface peripheral rib) 13a in a plan view may be a shape that follows the peripheral edge of the substrate 11, or may be a shape that does not follow the peripheral edge of the substrate 11. The shape of the convex portion (lower surface peripheral rib) 13a in a plan view may be circular, linear, or curved so as to be convex toward the peripheral edge of the substrate 11. Furthermore, the shape of the convex portion (lower surface peripheral rib) 13a in a plan view may be a U-shape that is convex toward the peripheral edge of the substrate 11.

[0045] The bottom member 1 may have radial ribs 12a that protrude from the lower surface of the substrate 11 and extend radially from the center of the substrate 11 toward the periphery of the substrate 11. In other words, the bottom member 1 may have spoke-like radial ribs 12a that extend radially from the center of the substrate 11 toward the periphery of the substrate 11. By having the radial ribs 12a in the bottom member 1, the strength and rigidity of the bottom member 1 can be improved, and the thickness of the substrate 11 can be reduced. This allows for a reduction in the amount of raw material used for the container 100, which contributes to a reduction in waste.

[0046] The radial ribs 12a are preferably provided at positions that are n-fold rotationally symmetric about the center of the bottom surface member 1, where n is an integer of 2 or greater. In this embodiment, the number of radial ribs 12a is six, and the six radial ribs 12a are provided at positions that are six-fold rotationally symmetric. In the example shown in FIGS. 1 to 3, the bottom surface member 1 has radial ribs 12a, but it is not necessarily required to have radial ribs 12a.

[0047] Fig. 4 is a perspective view seen from the top side of the bottom surface member 1. As shown in Fig. 4, the bottom surface member 1 may have an upper surface peripheral rib 13b formed on the upper surface 11b of the substrate 11 from the periphery of the substrate 11 around the entire periphery.

[0048] The bottom member 1 has the upper surface peripheral rib 13b, which can increase the rigidity in the direction perpendicular to the outer peripheral wall 14 of the bottom member 1. Therefore, it is possible to prevent the bottom member 1 from being deformed by an external force received when a user grips the lower part of the container 100, an external force received when the lower part of the container 100 is pinched by an instrument or the like, or an external force received when the container 100 is tipped over or dropped.

[0049] The bottom member 1 may have radial ribs 12b provided on the upper surface 11b of the substrate 11 and extending radially from the center of the bottom member 1 toward the periphery of the substrate 11. In other words, the bottom member 1 may have spoke-like radial ribs 12b extending radially from the center of the substrate 11 toward the periphery of the substrate 11. By having the radial ribs 12b in the bottom member 1, the strength and rigidity of the bottom member 1 can be improved, and the thickness of the substrate 11 can be reduced. This allows for a reduction in the amount of raw material used for the container 100, which contributes to a reduction in waste.

[0050] As described above, the radial ribs may be provided on the upper surface 11b, the lower surface 11a, or both surfaces of the substrate 11. That is, the bottom member 1 may have radial ribs 12a or 12b that protrude from at least one of the upper surface 11b or the lower surface 11a of the substrate 11 and extend radially from the center of the substrate 11 toward the periphery of the substrate 11.

[0051] The radial ribs 12b are preferably provided at positions that are n-fold rotationally symmetric about the center of the bottom surface member 1, where n is an integer equal to or greater than 2. In this embodiment, the number of radial ribs 12b is six, and the six radial ribs 12b are provided at positions that are six-fold rotationally symmetric. In the example shown in Fig. 4, the bottom surface member 1 has radial ribs 12b, but it is not necessary for the bottom surface member 1 to have radial ribs 12b.

[0052] Each component constituting the container 100 may be endowed with one or more functions, such as oxygen absorption, odor absorption, non-adsorption, etc. The material constituting each component constituting the container 100 is not limited to resin, and different materials such as paper, cloth, nonwoven fabric, fiber, metal, and inorganic compound may be laminated or blended.

[0053] <Manufacturing method, manufacturing equipment> Figure 5A is a diagram showing a method for manufacturing a container 100 according to one embodiment (part 1), Figure 5B is a diagram showing a method for manufacturing a container 100 according to one embodiment (part 2), and Figure 5C is a diagram showing a method for manufacturing a container 100 according to one embodiment (part 3).

[0054] 5A to 5C, the manufacturing apparatus 70 for the container 100 of this embodiment has a holding part 71 that detachably holds the top surface member 2 and the cylindrical member 3, and a support part 72 that supports the lower surface of the bottom surface member 1. The manufacturing apparatus 70 may also have a base 73.

[0055] The holding unit 71 may be, for example, a clamp that can be opened and closed automatically. The holding unit 71 can grip the mouth 4 or the top surface member 2 of the container 100. Because the mouth 4 and the top surface member 2 are rigid, they can grip the container 100 in a state before the bottom surface member 1 is attached, even if the cylindrical member 3 is flexible. The holding unit 71 may be attached to the base 73 via an arm or the like, or may be attached to another member.

[0056] The support portion 72 is provided on the base 73 and stands upright, perpendicular to the upper surface of the base 73. The support portion 72 may have a rod-like shape. The support portion 72 may be fitted into a fitting hole 74 extending in the up-down direction of the base 73 and be slidable up and down. In this case, at the lower limit position of the movable range of the support portion 72, it is preferable that the upper end of the support portion 72 is flush with or lower than the upper surface of the base 73. Furthermore, the support portion 72 may be swingable up and down within a range of 90 degrees, with the connection between the support portion 72 and the base 73 as the base point. In this case, it is preferable that by swinging 90 degrees from a state in which the support portion 72 is upright, perpendicular to the upper surface of the base 73, the support portion 72 fits into a groove formed in the upper surface of the base 73, and the side surface of the support portion 72 is flush with or lower than the upper surface of the base 73. The support portion 72 is provided so as to be switchable between a state in which it supports the lower surface of the bottom surface member 1 and a state in which it is separated from the lower surface of the bottom surface member 1.

[0057] The manufacturing method of the container 100 of this embodiment includes a first step of supporting the lower surface of the bottom member 1 with a support portion 72 and holding the bottom member 1 at an angle to the central axis 10 of the tubular member 3; a second step of covering the bottom member 1 with the top member 2 and the tubular member 3 from above; a third step of detaching the support portion 72 from the lower surface of the bottom member 1; and a fourth step of closing the opening 3b at one end (lower end) 3a of the tubular member 3 by joining the outer wall 14 of the bottom member 1 to the tubular member 3.

[0058] (1st step) 5A, the holding part 71 grips the mouth part 4 or the top surface member 2 of the container 100. At this time, the lower end 3a of the cylindrical member 3 is separated from the base 73. The support part 72 is in an upright position perpendicular to the base 73, and by engaging with the protrusion 13a on the lower surface of the bottom surface member 1, the support part 72 can hold the bottom surface member 1 at an angle with respect to the central axis 10 of the cylindrical member 3.

[0059] (2nd process) When the holding portion 71 releases its grip on the mouth portion 4 or the top surface member 2 of the container 100, the mouth portion 4, the top surface member 2, and the cylindrical member 3 fall downward under their own weight, as shown in Fig. 5B, and can be placed over the bottom surface member 1. At this time, the support portion 72 maintains the state (posture) of the first step. That is, the support portion 72 is engaged with the protrusion 13a on the underside of the bottom surface member 1, and holds the bottom surface member 1 at an angle with respect to the central axis 10 of the cylindrical member 3.

[0060] (3rd step) 5C, the support portion 72 is slid downward within the fitting hole 74 of the base 73 and released from the underside of the bottom member 1. As a result, the bottom member 1 touches the base 73 due to its own weight and assumes a position perpendicular to the central axis 10 of the cylindrical member 3. At this time, if the movement of the bottom member 1 is restricted by friction with the inner surface of the cylindrical member 3 and the bottom member 1 does not touch the base 73 due to its own weight, air may be fed in from the upper end of the opening 4. The fed air applies downward pressure to the bottom member 1, causing the bottom member 1 to touch the base 73 and assume a position perpendicular to the central axis 10 of the cylindrical member 3.

[0061] (4th step) The outer peripheral wall 14 of the bottom member 1 is joined to the inner peripheral surface of the cylindrical member 3 by heat sealing or the like to close the opening 3b at one end 3a of the cylindrical member 3. Through the above steps, the container 100 of this embodiment is obtained.

[0062] Although the embodiments have been described above, they are presented as examples and the present invention is not limited to the above embodiments. The above embodiments can be implemented in various other forms, and various combinations, omissions, substitutions, modifications, etc. can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the inventions and their equivalents as set forth in the claims. [Explanation of symbols]

[0063] 1 Bottom member 11 Circuit Board 12a, 12b Radial ribs 13a Convex portion (bottom peripheral rib) 13b Upper peripheral rib 14 Peripheral wall 2 Top surface parts 3 Cylindrical member 3a One end (lower end) 3b aperture 4 Mouth 41 Male screw 10 Center axis 70 Manufacturing equipment 71 Holding part 72 Support part 73 Foundation 74 Fitting hole 100 containers

Claims

1. A container comprising: a bottom member; a top member; a flexible tubular member joined to the bottom member and the top member; and a mouth portion provided on the top member; the bottom surface member and the top surface member have rigidity, a method for manufacturing a container, the method comprising the steps of: manufacturing a container having a base plate and a convex portion protruding from a surface of the base plate opposite to a surface facing the mouth portion, a first step of supporting a lower surface of the bottom member with a support portion and engaging the support portion with the protrusion, thereby holding the bottom member at an angle with respect to the central axis of the tubular member; a second step of covering the bottom surface member with the top surface member and the cylindrical member; a third step of separating the support portion from the lower surface of the bottom member; and a fourth step of joining the outer peripheral wall of the bottom member to the cylindrical member to close an opening at one end of the cylindrical member.

2. A container comprising: a bottom member; a top member; a flexible tubular member joined to the bottom member and the top member; and a mouth portion provided on the top member; the bottom surface member and the top surface member have rigidity, The bottom surface member is a container manufacturing device for manufacturing a container having a base plate and a convex portion protruding from a surface of the base plate opposite to a surface facing the mouth portion, a holding portion that detachably holds the top surface member and the cylindrical member; a support portion that supports a lower surface of the bottom member and is engaged with the protrusion to hold the bottom member obliquely with respect to the central axis of the cylindrical member, The container manufacturing device is configured so that the support portion can be switched between a state in which it supports the lower surface of the bottom member and a state in which it is detached from the lower surface of the bottom member.

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