JP3323841B2 - Thin-walled container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can be easily formed by a direct blow method, and can reduce the volume in which an automatic filling line can reliably perform filling or transfer of contents such as screwing of a cap or the like. Thin-walled containers.

[0002]

2. Description of the Related Art In recent years,
From the viewpoints of resource saving, environmental protection, cost reduction, and the like, thin-walled containers in which the thickness of the body is reduced have been used as containers for various substances. However, since such a thin-walled container has a thin and soft trunk, it is not possible to fill the contents and screw the cap into the automatic filling line in a factory while holding and fixing the trunk. Therefore, actual Kaihei 6
JP-A-78261 proposes a thin-walled container in which a two-stage flange is provided on the mouth and neck, and a mutually parallel detent is formed between the flanges. However, the thin-walled container described in the publication has a complicated structure around the mouth and neck, and is difficult to be formed by a direct blow method. Further, since a two-stage flange is interposed between the screwed cap and the body, a sense of unity does not occur between the cap and the body, resulting in poor appearance.

[0003] Accordingly, an object of the present invention is to reduce the volume, which is excellent in appearance, can be easily formed by a direct blow method, and can reliably fill contents and screw a cap in an automatic filling line. It is to provide a thin container.

[0004]

SUMMARY OF THE INVENTION The present invention provides a thin-walled container having a mouth-and-neck portion formed with a threaded ridge for screwing a cap, and a thin-walled body portion having a handle. A pedestal portion is formed on the outer peripheral surface, and a holding and fixing portion composed of a pair of planes parallel to each other is formed on an upright surface of the pedestal portion on both sides of the mouth and neck portion.
The upright surface is a pair of the flat surfaces constituting the holding and fixing portion,
A pair of upright curved surfaces connected to the pair of flat surfaces, and the pedestal portion;
Between the plane and the upright curved surface at a position near the upper end surface of
Such as an inclined surface that is located and inclined in the direction of the center line of the mouth and neck
And the periphery of the upper end surface of the pedestal is substantially circular.
The above object has been achieved by providing a thin-walled container.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on a preferred embodiment. The container of the present embodiment is a container formed by a direct blow method, and has a mouth and neck portion 1 on which a threaded ridge 12 for attaching a cap screw is formed on an outer peripheral surface,
And a crushable thin body 2 having a handle 25. The mouth and neck 1 is formed in a cylindrical shape at the upper end of the body 2, and a screwing ridge 12 is spirally formed on the outer peripheral surface thereof. Then, the cap 3 having the screwing ridge 31 corresponding to the screwing ridge on the inner peripheral surface is detachably screwed through the screwing ridge 12.

A pedestal 13 is formed on the outer peripheral surface of the base of the mouth and neck 1 of the container. That is, the mouth and neck 1
A screwing portion 11 covered by the cap when the cap is screwed;
The pedestal portion 13 is located below the screw portion 11 and has a larger outer dimension than the screw portion 11. The pedestal portion 13 includes an annular upper end surface 14 surrounding the periphery of the mouth and neck portion 1,
And an upright surface 15 having an upper end portion at an outer peripheral edge thereof and substantially perpendicular to the upper end surface 14. A pair of planes 1 parallel to each other are placed on the upright surfaces 15 of the pedestal on both sides of the mouth and neck 1.
A holding and fixing portion S composed of 6, 16 is formed. The holding and fixing portion S is a portion that is held and fixed by the holding means when the cap 3 is screwed in the automatic filling line.

More specifically, the upper end surface 1 of the pedestal portion will be described.
4 is formed in a planar shape so as to be perpendicular to the center line B of the mouth and neck portion 1, and faces the opening peripheral portion 32 of the cap 3 when the cap 3 is screwed.

The upright surface 15 of the pedestal portion includes a pair of flat surfaces 16, 16 forming the holding and fixing portion S, and a pair of the flat surfaces 1, 16.
A pair of upright curved surfaces 17 and 17 connected to the upper and lower surfaces of the pedestal portion and between the flat surface 16 and the upright curved surface 17 in the direction of the center line B of the mouth and neck portion; And a total of four inclined surfaces 18 that are inclined.

The pair of planes 16, 16 are formed on both sides of the mouth and neck portion 1 so as to be mirror images of each other. Both planes 16, 16 are both parallel to the center line B of the cervix 1. Distance L1 between the pair of planes 16, 16
And the ratio (L1 / A) between the outer diameter A of the cap hem and the outer diameter A of the cap hem is 0.8 to 1.2 from the viewpoint of achieving both secure fixing by the holding means and good appearance when the cap is screwed. Is preferred, and particularly preferably 0.9 to 1.1. From the same viewpoint, the area of each plane 16 is 60 to 14
0 mm ² , especially 80 to 120 mm
It is preferably ² .

Each of the upright curved surfaces 17 has an upper edge portion 17a in contact with the upper end surface 14 and a lower edge portion 17b in contact with the body portion 2, each having a substantially arc shape in plan view. The pair of flat surfaces 16 and 16 and the pair of upright curved surfaces 17 are all perpendicular to the upper end surface 14.

Each inclined surface 18 has a flat surface 16 and an upright curved surface 17.
Is formed in a substantially arc shape in the circumferential direction of the mouth and neck portion 1 and is substantially linear in a direction orthogonal to the circumferential direction. When each inclined surface 18 is viewed from a direction perpendicular to each inclined surface 18, a boundary line with the upper end surface 14, a boundary line with the plane 16, and a boundary line with the upright curved surface 17 are substantially triangular. A boundary line P1 between the inclined surface 18 and the upper end surface 14,
The angle (about 60 degrees) between the inclined plane 18 and the boundary line P2 between the plane 16 and the boundary line P1 and the boundary line P3 between the inclined plane 18 and the upright curved plane 17 (about 30 degrees) And smaller than the angle (about 90 degrees) between the boundary line P1 and the boundary line P3 (see FIG. 2). The lower end of the inclined surface 18 is located above the boundary between the upright surface 15 and the trunk 2.

Each inclined surface 18 is inclined in the direction of the center line B of the mouth and neck 1. That is, the distance between the inclined surface 18 and the center line B of the mouth and neck 1 becomes smaller toward the upper side of the mouth and neck 1. The shape of the peripheral portion of the upper end surface 14 of the pedestal portion is substantially circular so as to substantially match the shape of the opening peripheral portion 32 of the cap 3 when the cap 1 having a circular cross section is screwed. FIG. 2 shows the cap 3
The outline of the cap 3 at the time of screwing is shown by a two-dot chain line A '.

The body 2 has a pair of first side walls 2 opposed to each other.
1, 21 and respectively connected to the pair of first side walls,
A pair of second side wall portions 22 facing each other, and a linear distance L2 between the pair of second side wall portions 22;
(See FIG. 1) is longer than the linear distance L3 (see FIG. 4) between the pair of first side wall portions 21 and 21. That is, assuming that a view from the direction of arrow V in FIG. 1 is a front view,
A pair of first side wall portions 21 and 21 form a front surface and a back surface,
The pair of second side walls 22, 22 form left and right side surfaces, and the length L2 of the body in the left-right direction is longer than the length L3 of the body in the depth direction.

Each of the first side wall portions 21 and 21 has a rib 23 for assisting the crushing, which facilitates the crushing of the container.
Are formed over the width direction. Each rib 23 is formed as a concave groove on the outer surface of the container at about the center of the body 2 in the vertical direction, and a ridge is formed on the inner surface of the container. Each rib 23 has its both ends 23a, 23a
Are located at the boundary between the first side wall 21 and the second side wall 22, and do not substantially extend to each of the pair of second side walls 22. That is, each second side wall 2 has
A rib for assisting crushing in the width direction is not formed.

The body 2 is formed to be thin so that it can be easily crushed using the ribs 23.
Also, a pair of first side wall portions 2 are provided on the upper right side when viewed from the front.
An insertion hole 24 of the hand penetrating between the first and the second 21 and a handle 25 in the shape of a round bar that can be gripped are formed. In addition, the trunk 2
Is symmetric on both sides of the PL (see FIG. 4). The thin container has an inner volume of 2 liters or more.

In the thin-walled container of the present embodiment, the holding and fixing portion S composed of a pair of parallel flat surfaces is formed on the upright surface 15 of the pedestal portion formed on the outer peripheral surface of the base of the mouth and neck portion 1. In an automatic filling line of a factory, the contents are filled while holding the holding and fixing portion S by holding means, and
The cap can be screwed on. Therefore, the trunk 2
Even if is thin and flexible, the contents can be stably filled in the automatic filling line, and the cap can be firmly and securely screwed.

For example, the holding means 4 shown in FIG. 3 is composed of a pair of holding bars 41, 41 capable of expanding and contracting the space therebetween, and holding and fixing the holding portion S with the pair of holding bars 41, 41. By screwing the cap 3 in this state, the cap can be firmly and securely screwed with a required tightening torque. The holding means may be of any configuration as long as it can hold the holding and fixing portion S and fix the container, such as a pair of parallel bars having a fixed distance between them.

Further, since the holding and fixing portion S in the present container is formed on the upright surface 15 of the pedestal portion 13, the mouth and neck 1
The peripheral structure is relatively simple, and can be easily and efficiently manufactured by the direct blow method, similarly to a conventional container with a handle. That is, except that a mold having recesses and the like corresponding to the shapes of the pedestal portion 13 and the ribs 23 is used, the same as the conventional method, that is, the conventional method of manufacturing a thin-walled container with a handle by a direct blow method. And can be easily manufactured.

Further, since there is no flange or the like between the screwed cap 3 and the body 2, a sense of unity is created between the two, and the appearance of the container is good. In particular, since the shape of the peripheral edge of the upper end surface 14 of the pedestal portion is substantially circular, the appearance when the cap 3 having a circular horizontal cross section is mounted is particularly excellent.

Further, since the peripheral edge shape of the pedestal portion upper end surface 14 is made substantially circular by forming the inclined surface 18, the thickness of the pedestal portion 13 can be made uniform, and the holding and fixing portion S has sufficient strength. Can be obtained.

The ribs 23 for assisting the crushing are formed only on the first side wall portion 21 and do not extend to each of the pair of second side wall portions 22. While the portion 2 can be easily crushed, sufficient buckling strength against a load from above can be obtained. Therefore, in the case where the ribs 23 for assisting the crushing of the thin-walled container are formed in an annular shape over the first side wall portion 21 and the second side wall portion 22, the buckling strength of the container is reduced, so that the packing in the packing of corrugated cardboard or the like is performed. Although buckling strength is required, in the container of the present embodiment, it is possible to ensure ease of crushing in the lateral direction at the trunk without lowering buckling strength.

From this point of view, the contact between the tangent line TL parallel to the parting line PL and the outer surface of the first side wall portion 21 and the first side wall portion 21 is C. Assuming that the vertices of the convex curves connecting the points C and D intersecting the pair of second side walls 22 are F and G (see FIG. 4A), both ends 2
Preferably, 3a and 23a (see FIG. 1) are formed so as to be located at or near the vertices F and G.

The vertices F and G of the convex ridge are points on the convex curve, and a straight line C connecting the points D and E to the contact point C.
This is the point at which the distance to L is maximized. In the container of the present embodiment, the vertices F and G are boundaries between the first and second side walls. FIGS. 4B and 4C show the vertices F and G of the container of another embodiment having a different body shape. FIG.
(C) is a container having a cylindrical body, which is 4 mm from the PL surface.
The angle of 5 degrees is the vertex F and the vertex G.

The material for forming the thin container is not particularly limited as long as it can be blow-molded.
Conventionally known various materials such as C and polycarbonate can be used. What is filled in the inside may be a liquid or a powder. In addition, direct blow molding is not particularly described, as in the conventional method,
Alternatively, the method can be implemented by adding an appropriate design change to the conventional method.

Although the embodiment of the present invention has been described above, the present invention can be variously modified without being limited to the above embodiment. For example, the crushing assisting rib may be formed as a convex ridge on the outer surface of the container.

[0026]

The thin-walled container of the present invention has an excellent appearance, can be easily formed by a direct blow method, and can be securely filled with an automatic filling line and can be securely screwed in with a cap. Container.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the thin container of the present invention.

FIG. 2 is a plan view of the mouth and neck of the container of FIG. 1 as viewed from above.

FIG. 3 is a side view schematically showing a state in which a cap is screwed onto the container of FIG. 1 in an automatic filling line.

4 is a schematic view showing a plane cross section of a body of the container according to the present invention, FIG. 4 (a) is a plane cross section of the container of FIG. 1, and FIGS. 4 (b) and (c) are It is a figure showing the plane section of other embodiments.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mouth and neck part 12 Threaded ridge 13 Pedestal part 14 Upper end surface 15 Standing surface 16 Plane (holding fixing part) 17 Standing curved surface 18 Inclined surface 2 Body 21 First side wall 22 Second side wall 23 rib

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-247432 (JP, A) JP-A-6-247448 (JP, A) JP-A-10-167242 (JP, A) (58) Field (Int. Cl. ⁷ , DB name) B65D 1/02

Claims (3)

(57) [Claims] 1. A thin-walled container having a mouth-and-neck portion formed with a threaded ridge for screwing a cap and a thin-walled body having a handle, wherein a base portion is formed on an outer peripheral surface of a base portion of the mouth-and-neck portion. Has been
On the upright surface of the pedestal portion on both sides of the mouth and neck, a holding and fixing portion formed of a pair of parallel planes is formed ,
The erected surface of the pedestal portion is a pair of
And a pair of uprights connected to the pair of planes
And the plane at the position near the upper end surface of the pedestal.
Located between a curved surface and inclined toward the center line of the mouth and neck
Of the upper surface of the pedestal portion
Is a thin-walled container. 2. The body includes a pair of first side walls facing each other and another pair of second side walls facing each other, and a distance between the pair of second side walls is a pair of the second side walls. The distance between the first side walls is longer than the distance between the first side walls. Each of the pair of first side walls is formed with a rib for assisting crushing in the width direction. the thin-walled container according to claim 1, wherein the ribs for crushing aid across the width direction is not formed. Wherein the thin-walled container, according to claim 1 or 2 thin container according its internal volume is at least 2 liters.