JP2008273542A - Thin-walled vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thin-walled vessel the bottom part of which has a filling aperture that can be easily and accurately flattened and heat-sealed, while the bonded filling aperture can be easily folded so that it does not come in the way of the vessel in being raised upright. <P>SOLUTION: The thin-walled vessel is constituted of an aperture part, body part, and the bottom part in which a filling aperture is arranged, while the bottom part is of an ellipse form across its transverse section, having a front bottom part, rear bottom part, and a bottom wall part so formed as to be recessed inward from the inside edge rims of the front bottom part and rear bottom part, whereas the filling aperture of the bottom part is formed of a tube continuously provided on the vessel via contracted diameter portion with the tube being formed of a cylindrical part with an opening part, and a bent portion provided thereunder. In order for the cross section of the cylindrical part to become quadrilateral the bent portion is characteristically so arranged that it is formed of four corner parts arranged circumferentially in the cylindrical part, folding lines that tie the respective neighboring corners, and of upper and lower folded planes surrounded by upper and lower circular arcs with the respective folding lines being used as bowstrings. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a thin-walled container, and more particularly, to a thin-walled container in which a filling port portion is disposed at the bottom and the tip of the filling port portion is heat-sealed after the contents are filled.

In a thin container, a filling port is provided at the bottom of the container separately from the mouth tube part at the top of the container, and the container is filled with the content liquid from the filling port with the mouth tube part sealed with a stopper. Thin-walled containers are conventionally known (see Patent Document 1).
JP-A-6-278759

  However, since the container described in Patent Document 1 has a cylindrical shape so that the filling port can be easily filled with the content liquid, it has not been possible to easily crush the filling port flatly during heat sealing. .

  Furthermore, the bottom of the container is provided with a concave bottom part that is recessed inward, and a filling port is provided in the concave part so that the container is erected, but if the heat seal part of the filling port is close to the concave part, With the deformation of the cylindrical shape of the filling port, the concave portion is pulled, and the shape of the container bottom may be deformed.

  In order to solve the above-mentioned problems, the present invention is to easily and accurately flatten and heat-seal the filling port portion provided at the bottom of the container, and the bonded filling port portion An object of the present invention is to provide a thin-walled container that can be easily bent so as not to interfere with the upright position.

  In order to solve the above problems, the present invention is a thin-walled container made of a synthetic resin, which is formed by blow molding, as a thin-walled container, comprising a mouth portion, a trunk portion, and a bottom portion provided with a filling mouth portion. The bottom has a substantially oval cross section, and includes a front bottom and a rear bottom, a front bottom and a bottom wall formed so as to be recessed inwardly from an inner edge of the rear bottom. The tube portion is formed by a tube portion continuously provided to the container through a reduced diameter portion, and the tube portion is formed by a mouth tube portion having an opening portion and a bent portion provided at a lower portion thereof, and the bent portion. The four tops arranged in the circumferential direction of the mouth tube part, the fold line parts connecting the adjacent top parts, and the respective fold line parts so that the cross section of the mouth tube part becomes a quadrilateral With the upper and lower bent surfaces surrounded by the upper and lower arcs as a string, and the top facing the filling port Parts and a line connecting has to adopt a structure which is characterized in that it is arranged so as to be parallel to the major axis direction or minor axis direction, the cross section of the container bottom.

As the arrangement position of the filling port portion, the bottom filling port portion is arranged at the center of the bottom wall portion of the bottom portion, or a step portion is provided at the center portion of the front bottom portion of the bottom portion. And adopting a configuration characterized in that the bottom filling port portion is disposed at the center of the step portion.
Further, in order to lock the front end of the filling port, a flat locking recess having protrusions formed on both sides is provided near the center of the rear bottom. adopt.

  As another embodiment of the thin container, a thin container made of synthetic resin formed by blow molding having a mouth portion and a trunk portion, a bottom portion and a filling mouth portion disposed on the bottom portion, the bottom portion being a bottom portion It is provided with a wall and a reversible inclined wall that protrudes outward through a step at the center of the bottom wall, and the bottom filling port is reduced in diameter from the tip of the inverted inclined wall. Formed by a cylindrical portion provided continuously through the portion, the cylindrical portion is composed of a mouth cylindrical portion having an opening and a bent portion provided in the central portion of the cylindrical portion, Four tops arranged in the circumferential direction of the mouth tube part so that the cross section of the mouth tube part is a quadrilateral, a fold line part connecting the adjacent top parts, and each fold line part is a string As the upper and lower bent surfaces surrounded by the upper and lower arcs, connecting the top and the top opposite to the filling port But to adopt a structure which is characterized in that it is arranged so as to be parallel to the major axis direction or minor axis direction, the cross section of the container bottom.

  In the filling port provided at the bottom of the thin-walled container of the present invention, a cylindrical part provided with an opening and a bent part are formed in a cylindrical part continuously provided from the bottom of the container via a reduced diameter part. , As the folding part, four tops arranged to form a quadrilateral, a folding line part connecting the adjacent top parts, and an arc-shaped folding surface above and below each folding line part, A bent portion is formed in which the line connecting the top and the top facing each other is parallel to the major axis direction or the minor axis direction of the container with respect to the filling port part at the bottom. Therefore, after filling the content liquid, the filling port portion can be easily and accurately flattened by the bent portion, and the heat sealing of the filling port portion is surely performed.

  Moreover, even if the height of the filling port portion is high to some extent, the crushed opening can be bent by the folding portion, so that the tip of the filling port portion can be connected to the container even if the depth of the recess at the bottom of the container is shallow. By engaging with the bottom of the container, the container can be erected without disturbing the filling port.

  Next, examples of the container of the present invention will be described with reference to the drawings.

1 and 2, A is a thin container made of synthetic resin formed by blow molding.
The container A is composed of a mouth portion 1, a body portion 2 and a bottom portion 3 having an elliptical cross section, and a filling mouth portion 4 is disposed in the bottom portion 3.
The mouth portion 1 is composed of a mouth tube portion 5, a dome portion 6 extending upward, and a sealing portion 7 that seals the periphery of the dome portion 6 and serves as a knob.
The trunk portion 2 is formed of a front trunk wall 8a, a rear trunk wall 8b, and side trunk walls 8c and 8d on both sides.

The bottom portion 3 is composed of a front bottom portion 9 a, a rear bottom portion 9 b, and a bottom wall portion 10.
(The front and rear here refers to the front and rear of the container in the state shown in FIG. 2.)
The front bottom portion 9a includes a lower end portion of the front trunk wall 8a, a front side wall of the bottom wall portion 10, and a front bottom wall 11a formed therebetween.
The bottom wall portion 10 is formed so as to be recessed from the inner edges of the front bottom portion 9a and the rear bottom portion 9b, with the line connecting the lower ends of the side trunk walls 8c, 8d of the trunk portion 2 being the lowest line. The filling port portion 4 is disposed.

  Near the center of the rear bottom portion 9b, a flat locking recess 12 is provided that is recessed so as to cut out a lower end portion of the rear trunk wall 8b and a part of the bottom wall portion 10 from the rear bottom wall 11b. Projections 13 are formed on both side portions on the rear bottom wall 11 b side of the locking recess 12.

  As shown in FIGS. 2 and 3, the filling port portion 4 is formed by a cylindrical tube portion 4 a continuously provided from the bottom wall portion 10 via a reduced diameter portion 14, and the tube portion 4 a has an opening at the upper end. And the bent portion 16 provided at the lower portion of the mouth tube portion 15.

The bent portion 16 is formed into a quadrilateral shape by the top portions 17a, 17b, 17c, and 17d located on the cylinder of the mouth tube portion 15 and the bent line portions 18a, 18b, 18c, and 18d that connect the adjacent top portions, respectively. The fold line portions 18a, 18b, 18c, and 18d are formed above and below the arch shape surrounded by the upper and lower arcs with each fold line portion as a string, or upper and lower portions that are nearly semicircular. A bent surface 19 is formed.
Further, the bent portion 16 has a line connecting the top portion 17a and the top portion 17c parallel to the major axis direction of the bottom portion 3 of the elliptical cross section of the container A, and a line connecting the top portion 17b and the top portion 17d. The cylinder 4 a of the filling port 4 is disposed so as to be parallel to the minor axis direction of the bottom 3.

Next, usage modes and operational effects of the thin-walled container according to this embodiment will be described.
When filling the contents, as shown in FIG. 2, the container A in which the mouth portion 1 is sealed with a cap or the like is filled with the contents from the opening portion of the filling mouth portion 4 with the bottom portion 3 facing upward.

When filling is completed, the filling port 4 is pressed from the short diameter direction of the container A bottom 3 as shown in FIG. 4A, and the tip 15 a of the mouth tube 15 is moved in the long diameter direction of the container A bottom 3. Heat seal so that it is parallel to
At that time, each of the bent portions 16 is deformed so that the distance between the top portion 17b and the top portion 17c increases and the distance between the top portion 17a and the top portion 17c increases. The filling port 4 can be made flat so that the fold line portions 18a, 18b side is the front surface and the fold line portions 18c, 18d side is the back surface.

In a state where the filling port portion 4 is flattened, the tip portion 15a is brought down to the rear bottom portion 9b side of the container A and engaged with the locking recess 12 of the rear bottom portion 9b as shown in FIG. 4B. Let
At that time, the filling port portion 4 bends as a fold line on the fold line portion 18a and the fold line portion 18b side of the fold portion 16 and on the fold line portion 18c and the fold line portion 18d side. 4 can be easily defeated without shifting.

  Since the filling port portion 4 is bent with the fold line portion 18a and the fold line portion 18b side of the fold portion 16 and the fold line portion 18c and the fold line portion 18d side as fold lines, The shape retaining property is good, and both sides of the distal end portion 15a engage with the lower portions of the protrusions 13 on both sides of the locking recess 12, so that the bent state of the filling port portion 4 can be maintained and the container is being used. It is possible to prevent the filling port portion 4 from protruding from the bottom portion 3.

Even when the container is erected, the front bottom wall 11a and the rear bottom wall 11b of the bottom part 3 are the bottom surfaces, so that the container is erected reliably.
Further, since the filling port portion 4 is bent and engages with a locking recess 12 that is recessed toward the container side from the rear bottom wall 11b of the rear bottom portion 9b, the filling port portion 4 is properly positioned when the container is upright. Does not hinder standing.

Next, a description will be given of a second embodiment in which the arrangement position of the filling port portion of the container is changed.
The same components as those of the first embodiment of the present embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

In FIG. 5, Aa is a thin container made of synthetic resin formed by blow molding.
The container Aa has a mouth part (not shown) for pouring the contents in the container, a body part 2 and a bottom part 20 having an elliptical cross section, and a filling mouth part 4 disposed on the bottom part 20. It is.

The bottom portion 20 includes a front bottom portion 21a, a rear bottom portion 21b, and a bottom wall portion 22.
The front bottom portion 21a is formed by a lower end portion of the front trunk wall 8a, a front side wall of the bottom wall portion 22, and a front bottom wall 23a formed therebetween, and the rear bottom portion 21b is formed by a lower end portion of the rear trunk wall 8b, It is formed from a rear side wall of the bottom wall portion 22 and a rear bottom wall 23b formed therebetween.
The bottom wall portion 22 is formed so as to be recessed from the inner edges of the front bottom wall 23a and the rear bottom wall 23b, with the line connecting the centers of the side trunk walls 8c and 8d on both sides of the body portion 2 as the lowest line. .

A notch 24 is provided near the center of the front bottom 21a. The notch 24 is deeply cut from the surface of the front bottom wall 23a, and the bottom has a wide step 25. A filling port 4 is disposed in the center.
A locking recess 26 is disposed on the rear bottom 21 b, and protrusions 27 are formed on both sides of the surface of the rear bottom wall 23 b of the locking recess 26.

Next, usage modes and operational effects of the thin-walled container according to this embodiment will be described.
When filling the contents, the contents are filled from the opening portion of the filling port portion 4 with the container Aa having its mouth sealed with a cap or the like with the bottom portion 20 facing up.

When filling is completed, the filling port 4 is pressed from the short diameter direction of the container Aa bottom 20 as shown in FIG. 6A, and the tip 15a of the mouth tube 15 is moved in the long diameter direction of the container Aa bottom 20. And heat-sealing so as to be parallel to each other, and flattening and filling the filling port portion 4.
The effect of the filling port 4 is the same as that of the first embodiment.

  In the state where the filling port portion 4 is flattened, the container Aa is tilted to the rear bottom portion 21b side, and as shown in FIG. 6B, the filling port portion 4 is bent by the bending portion 16, and the tip portion 15a. Is engaged with the locking recess 26.

The tip 15a of the filling port 4 can be folded by heat sealing and the filling port 4 itself is flattened by the folding part 16, so that the shape of the filling port 4 itself can be folded. Can be better.
Further, since the filling port portion 4 is disposed in the center of the notch portion 24 of the bottom portion 20, the filling port portion 4 itself can be crushed in parallel to the bottom portion 20 of the container Aa, and the bottom portion 20 of the container Aa can be crushed. Appearance can be improved.

  In each of the above embodiments, in order to prevent the filling port portion from protruding during use of the container, the front end portion of the filling mouth portion is bent through the folding portion, and the front end portion is engaged with the rear bottom side of the container. It is engaged with the lower part of the protrusion provided on both sides of the stopper recess, but the tip of the filling port is directly bonded to the locking recess on the rear bottom side of the container with heat fusion or adhesive Also good.

Next, a description will be given of a third embodiment in which the shape of the bottom of the container is changed.
The same components as those of the first embodiment of the present embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

In FIG. 7, Ab is a thin container made of synthetic resin formed by blow molding.
The container Ab includes a mouth part (not shown) for pouring the contents in the container, a trunk part 2 having an elliptical cross section, a bottom part 30, and a filling mouth part 31 disposed on the bottom part 30. Yes.

  The bottom portion 30 includes a bottom wall 32 and a reversible reversing inclined wall 34 provided so as to protrude outwardly through a step 33 at the center of the bottom wall 32. The filling port portion 31 is continuously provided.

The filling port portion 31 is formed by a cylindrical tube portion 31a provided continuously from the tip of the inversion inclined wall 34 via the reduced diameter portion 35. The tube portion 31a includes an opening tube portion 36 having an opening portion. The bent portion 16 is provided at the central portion of the cylindrical portion 31a.
The configuration of the bent portion 16 is the same as that of the first embodiment.

Next, usage modes and operational effects of the thin-walled container according to this embodiment will be described.
When filling the contents, the container Ab in which the mouth portion is sealed is filled from the opening portion of the filling mouth portion 31 with the bottom portion 30 facing up.

  When the filling is completed, the filling port 31 is crushed from the short diameter direction of the container Ab bottom 30 as shown in FIG. 8A, and the front end portion 36 a of the mouth tube portion 36 is changed to the long diameter direction of the container Ab bottom 30. Heat-sealing so that they are parallel to each other, the filling port 31 is made flat and bonded.

  When the collapsed filling port portion 31 is pressed from above and only the reverse inclined wall 34 of the bottom portion 30 of the container Ab is reversed through the stepped portion 33 and the reduced diameter portion 35 of the filling port portion 31, FIG. As shown to (b), the filling port part 31 can be mounted inward rather than the bottom wall 32 of the container Ab.

  The filling port portion 31 has a shape that can be easily flattened when being crushed by the deformation of each top portion of the bent portion 16, so that the opening of the tip end portion 36 a is surely flattened during heat sealing. Can be heat sealed.

The filling port portion 31 can be deformed at the top of each of the bent portions 16 after heat sealing, and the shape of the filling port portion 31 in the vicinity of the bent portion 16 can be deformed. The circular shape of the portion and the reduced diameter portion 35 can be connected without difficulty.
Moreover, since the flat heat seal part of the front-end | tip part 36a and the circular shape of the reduced diameter part 35 can be connected easily through a bending part, the height of the filling port part 31 is formed low compared with the conventional one. The height of the inversion inclined wall 34 of the container Ab can also be formed low.

  In each of the above embodiments, the cross-sectional shape of the body and bottom of the container is an ellipse, but it is sufficient that the filling port provided at the bottom is flat so that it does not protrude from the bottom of the container during use. As for the cross-sectional shape, a circular shape or other polygonal shapes can be adopted, and the shape is not limited to the shape of the embodiment.

  The thin-walled container of the present invention can be flattened after filling the content liquid, and can be folded or positioned inside the container. As a container for other liquids, detergents, liquid soaps, shampoos, refills for detergents, liquid soaps, shampoos, etc., as well as liquids, creams, powders or gels in other fields Can also be used.

It is an elevation view of the container of the first embodiment of the present invention. It is a perspective view of the bottom part of a container. It is explanatory drawing of a filling port part, (a) is a top view, (b) is a side view. It is explanatory drawing of the bottom part of a container, (a) is a perspective view after the heat seal of a filling port part, (b) is a perspective view after the filling port part is bent. It is a perspective view of the bottom part of the container of 2nd Example of this invention. It is explanatory drawing of the bottom part of a container, (a) is a perspective view after the heat seal of a filling port part, (b) is a perspective view after the filling port part is bent. It is a perspective view of the bottom part of the container of 3rd Example of this invention. It is explanatory drawing of the bottom part of a container, (a) is a side view after the heat sealing of a filling port part, (b) is a partial cross section figure after the inversion of the inversion inclination wall of a bottom part.

Explanation of symbols

A, Aa, Ab Container 1 mouth part 2 trunk part 3, 20, 30 bottom part 4, 31 filling mouth part 5, 15, 36 mouth part 6 dome part 7 sealing part 8a trunk wall 8b rear trunk wall 8c, 8d side trunk Wall 9a, 21a Front bottom portion 9b, 21b Rear bottom portion 10, 22 Bottom wall portion 11a, 23a Front bottom wall 11b, 23b Rear bottom wall 12, 26 Locking recess 13, 27 Protrusion portion 14, 35 Reduced diameter portion 15a, 36a Tip Part 16 Bending part 17a, 17b, 17c, 17d Top part 18a, 18b, 18c, 18d Bending line part 19 Bending surface 23a Front wall 23b Rear wall 24 Notch part 25 Step part 32 Bottom wall 33 Step part 34 Inversion inclination wall

Claims (5)

It consists of a mouth part, a body part, and a bottom part provided with a filling mouth part, and is a thin-walled container made of synthetic resin formed by blow molding,
The bottom portion is substantially elliptical in cross section, and includes a front bottom portion and a rear bottom portion, a front bottom portion and a bottom wall portion formed so as to be recessed inward from an inner edge of the rear bottom portion,
The filling port portion at the bottom is formed by a cylindrical portion connected to the container via a reduced diameter portion,
The tube portion is formed from a mouth tube portion having an opening and a bent portion provided at the lower portion thereof,
The folding portion includes four top portions arranged in the circumferential direction of the mouth tube portion so that the cross section of the mouth tube portion has a quadrilateral shape, a bend line portion connecting the top portions adjacent to each other, and the respective folding portions. It is formed from the upper and lower bending surfaces surrounded by the upper and lower arcs with the bending line portion as a string,
A thin container characterized in that a line connecting the top and the top facing each other with respect to the filling port is arranged so as to be parallel to the major axis direction or the minor axis direction of the transverse section of the container bottom. .   The thin-walled container according to claim 1, wherein the bottom filling port portion is disposed at the center of the bottom wall portion of the bottom portion. A step is provided at the center of the front bottom of the bottom,
The thin-walled container according to claim 1, wherein the filling port portion at the bottom portion is disposed at the center of the step portion.   The thin container according to any one of claims 1 to 3, wherein a flat locking recess having protrusions formed on both sides is provided near the center of the rear bottom. A synthetic resin thin-walled container formed by blow molding comprising a mouth part and a body part, a bottom part and a filling mouth part disposed on the bottom part,
The bottom portion includes a bottom wall and a reversible inclined wall that is provided so as to protrude outward at the center of the bottom wall via a stepped portion,
The bottom filling port portion is formed by a cylindrical portion continuously provided from the tip of the inverted inclined wall via a reduced diameter portion. It consists of a bent part provided,
The folding portion includes four top portions arranged in the circumferential direction of the mouth tube portion so that the cross section of the mouth tube portion has a quadrilateral shape, a bend line portion connecting the top portions adjacent to each other, and the respective folding portions. It is formed from the upper and lower bending surfaces surrounded by the upper and lower arcs with the bending line portion as a string,
A thin container characterized in that a line connecting the top and the top facing each other with respect to the filling port is arranged so as to be parallel to the major axis direction or the minor axis direction of the transverse section of the container bottom. .

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