JP2007238139A - Paper container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper container which is non-bulky, and capable of obtaining the predetermined moistureproof property and sealability, and easily allowing an engagement piece to be inserted in an engagement inserting part when a lid is closed. <P>SOLUTION: In the paper container in which a lid for covering a top opening of a box body is hinge-connected to a back side plate of the box, an engagement piece is formed on a front plate of the lid; the engagement inserting part with the engagement piece to be inserted in a lid closed state is formed on the front plate of the box body; and the engagement inserting part is passed through the front plate of the box body. A synthetic resin film for covering the engagement inserting part from a back side of the front plate of the box body is affixed, and the engagement piece can be inserted in a non-affixed area surrounded by an affixed portion with the synthetic resin film. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a paper container, and more particularly to a paper container for storing powder such as a powder detergent, which can obtain a predetermined moisture-proof property and hermeticity without being bulky, and is engaged when closing a lid. The present invention relates to a paper container in which an engagement piece can be easily inserted into an insertion portion.

2. Description of the Related Art As a paper container for household powder detergents and the like, a paper container is widely used that is formed so as to be openable and closable by connecting a lid that covers the top opening of the box to the back plate of the box.
In such a paper container, a locking mechanism is provided for locking the lid in place on the box so that the lid does not easily open and the contents spill or fall off. Is common.
As a locking mechanism, it is common to insert an engagement piece formed on the front plate of the lid into an engagement insertion portion formed on the front plate of the box. A so-called insertion lock system in which an engagement piece formed by providing an extension portion is inserted downward from the engagement insertion portion, an extension portion is provided on the front plate of the lid, and the extension portion is provided at the base end portion An engagement piece formed by an upwardly convex cut line or an engagement piece formed by folding the elongated portion inwardly from a crease line engraved at the base end portion is moved upward from the engagement insertion portion. A so-called kohaze lock system is used.

  In such a locking mechanism, it is necessary to cover the engagement insertion portion from the inside to prevent leakage of contents and intrusion of moisture, and the upper flap extending above the front plate of the box body is folded back inside. A method of adhering the engagement insertion part so as to cover the engagement insertion part from the inner side is often used (for example, refer to Patent Documents 1 and 2).

However, this method has the following disadvantages.
(1) The size of the upper flap of the front plate (the length of the up-and-down method) needs to be a size that can sufficiently cover the engaging insertion portion, which increases the paper development area. Moreover, since the box is formed by assembling a paper material cut into a predetermined developed shape, the upper flaps of the back plate and the side plates have the same dimensions as the upper flaps of the front plate, or Cutting from the same dimension as the upper flap of the front plate to a predetermined dimension results in wasted paper.
(2) Since the upper flap is bonded over a wide range, the thickness of the front plate increases.
(3) To completely seal the engagement insert, the adhesive must be applied to the entire circumference of the engagement insert on the back of the front plate without any gaps, so cold glue (emulsion used as it is without heating) It is necessary to use an adhesive requiring a crimping time, such as a type of adhesive), and the manufacturing time becomes long.

JP 2002-347757 A JP 09-150826 A

  In view of the above-mentioned problems of the background art, the present invention provides a paper container that has a predetermined moisture-proof property and hermeticity without being bulky and that allows easy insertion of an engagement piece into an engagement insertion portion when closing the lid. The purpose is to provide.

  The present invention is a paper container in which a lid covering an upper surface opening of a box is hinged to a back plate of the box, and an engagement piece is formed on the front plate of the lid, The front plate is formed with an engagement insertion portion into which the engagement piece can be inserted in the closed state. The engagement insertion portion is formed through the front plate of the box, and Provided is a paper container in which a synthetic resin film is attached to cover the engagement insertion portion from the back side of a face plate, and an engagement piece can be inserted into a non-adhesion region surrounded by the adhesion portion of the synthetic resin film.

  The paper container of the present invention has a predetermined moisture-proof property and hermeticity without being bulky, and can smoothly insert the engagement piece into the engagement insertion portion without frictional resistance. It can be manufactured from a paper material of an area in a short manufacturing time.

  In the paper container of the present invention, the engagement insertion portion is formed so as to penetrate the front plate of the box, and a synthetic resin film is adhered to the back surface of the front plate of the box so as to cover the engagement insertion portion. The engaging piece can be inserted into a non-sticking region surrounded by the sticking part of the synthetic resin film.

An embodiment of a paper container of the present invention will be described with reference to the drawings. FIGS. 1-10 is a figure which shows the example of embodiment of the paper container of this invention.
As shown in FIGS. 1 to 3, the paper container 10 of the present invention includes a box 11 and a lid 12, and the box 11 has an opening 11 </ b> E on the upper surface. The opening 11E is adhered and sealed with a certain width to the outer surface of the entire opening edge portion composed of the front plate 11A, the back plate 11B, and both side plates 11C or the inner surface of the top plate 12D of the lid 12 by the sealing paper 14. It is possible to prevent leakage of contents such as powder detergent at the distribution and storage stage.
The paper container normally contains about 500 g to 2.5 kg, preferably about 1 to 2 kg of powder detergent or the like.

As the material of the box 11, from the viewpoint of environmental friendliness and incineration at the time of disposal, a single sheet of paper or a laminated body such as a three-layer structure in which paper is a main material and a plastic film is laminated as an inner layer can be used. Although there is no restriction | limiting in particular in the paper to be used, For convenience of handling, it is preferable that the basic weight is 350-700 g / m < ² > and thickness is 0.3-1.1 mm.
The box 11 is assembled by bending the material, and includes a front plate 11A, a back plate 11B, both side plates 11C, and a bottom plate 11D, and an opening 11E on the top surface. In the case of the form of FIG. 1, the box 11 has a front plate 11 </ b> A, a back plate 11 </ b> B, and both side plates 11 </ b> C folded back and bonded inside at the upper end side.

The material of the lid 12 is preferably a single paper or a laminate in which a main material is paper and a plastic film is laminated, like the box 11.
The lid 12 is assembled by bending the material, and includes a front plate 12A, a rear plate 12B, both side plates 12C, and a top plate 12D. The lid 12 includes a hinge coupling portion 12E bonded to the back plate 11B of the box 11 on the rear plate 12B, and covers the opening 11E of the box 11.
As shown in FIG. 3, the lid 12 may be configured such that the back plate 11B of the box body 11 is extended, a hinge ruled line is provided on the upper end side of the back plate 11B, and the hinge 12 is folded back inward. In the case of this form, the front plate 11A and the both side plates 11C of the box 11 are usually folded inward at their upper end sides and bonded.
The box body 11 and the lid 12 can be provided with gripping portions (not shown) such as a handle and a handle (handle). For the convenience of handling, the gripping part can be attached to the surface of the side plates 11C of the box, the side plates 12C of the lid, the top plate 12D of the lid, and the like.

  A knob piece 22 is formed on the front plate 12A of the lid 12 so as to protrude through a base end (substantially central lower edge). In the unused state, the lid 12 is adhered and fixed to the gluing portion 23 of the front plate 11A of the box body 11 by a tack seal on the back surface of the knob piece 22 or an adhesive, and the gluing portion 23 is attached at the first use. By peeling off, the hinge coupling portion 12E that connects the lid 12 and the box 11 can be opened and closed as a pivot point.

4 is a diagram illustrating an example of a front view of the paper container 10 in a closed state, and FIG. 5 is a diagram illustrating an example of a front view of the box 11. In the closed state of FIG. 4, a knob piece 22 formed with an engagement piece 19 appears on the front plate 12 </ b> A of the lid 12, and the engagement insertion portion 31 formed on the front plate 11 </ b> A of the box 11. Is obscured.
In FIG. 5, the engagement insertion portion 31 is formed at a position facing the engagement piece 19 formed on the knob piece 22 of the lid 12 when the lid is closed.

  The engagement insertion part 31 should just be a magnitude | size which can insert the engagement piece 19 of the lid | cover 12, and the form is not specifically limited. FIG. 6 is a diagram illustrating an example of the locking insertion portion. In FIG. 6, the engagement insertion part 31 may have a substantially square shape (a) or a slit shape (b). Further, the upper edge portion 31A of the engagement insertion portion 31 is not limited to a horizontal line shape, and may be a downwardly convex circular arc shape or a belt shape as shown in FIGS. 6 (c) and 6 (d). As shown in (e) and (f), an upwardly convex kamaboko shape or a semicircular shape may be used.

  The paper container of the present invention is characterized in that a synthetic resin film that covers the engaging insertion portion from the back side of the front plate of the box is attached.

FIG. 7 is a view showing the back side of the front plate of the box in a state where the engagement piece is not inserted, and FIG. 8 is a cross-sectional view taken along line AA of FIG. 7 in a state where the engagement piece is inserted. FIG.
7 and 8, the synthetic resin film 13 is adhered to the back surface of the engagement insertion portion 31 provided through the front plate 11A of the box, and the non-adhesion region surrounded by the adhesion portion. The engaging piece can be inserted into the. 11F is a flap of the front plate of the box, and is attached to the inside of the box so as to cover the upper part of the synthetic resin film 13.
As shown in FIG. 8, in the closed state, the engagement piece 19 is inserted from the engagement insertion portion 31 and further combined with the box front plate 11A above the upper edge portion 31A of the engagement insertion portion. It is inserted between the resin films 13 and the lid is fixed.
Note that the flap 11F is provided to increase the strength of the box. If a desired strength can be obtained, the length to the position covering the top of the synthetic resin film 13 (vertical direction) is not necessarily required. Need not be).

  4, 7 and 8, the engaging piece is provided with an extending portion on the front plate of the lid, and an upwardly protruding cut line is engraved around the base end portion of the extending portion. As shown in FIG. 9, an extension is provided on the front plate of the lid, and the base end of the extension or the base end of the extension is in the distal direction and parallel to the base end. The engagement piece 19 may be formed by folding the extended portion inward from the engraved crease line.

8 and 9, the engagement piece 19 is inserted from the engagement insertion portion 31, and further combined with the box front plate 11A above the upper edge portion 31A of the engagement insertion portion. Although inserted between the resin films 13, as shown in FIG. 10, the front end of the engagement piece 19 may be brought into contact with the upper edge portion 31A of the engagement insertion portion and locked.
In the embodiment shown in FIGS. 8 and 9, a convex embossing process is applied inward to a region where the engagement insertion portion 31 of the flap 11F and the engagement piece 19 above the flap 11F are inserted. Although the insertion of the joint piece 19 is facilitated, conversely, a convex embossing may be applied to the same region of the front plate 11A toward the outside.

  Furthermore, all of the modes shown in FIGS. 8 to 10 are of the so-called koze lock type in which the engagement piece is inserted upward from the engagement insertion portion when closing the lid. When closing the lid as shown, a so-called insertion lock system in which the engagement piece is inserted downward from the engagement insertion portion may be used.

Examples of the synthetic resin film include films of synthetic resins such as stretched polypropylene (OPP), polyethylene (PE), and polyethylene terephthalate (PET), and those laminated on thin paper.
The thickness of the synthetic resin film is suitably 0.01 to 0.1 mm.
Since the engaging piece is pressed against and slides on the synthetic resin film, moderate rigidity is required, but the synthetic resin film having the above thickness has that rigidity.

As a method of adhering the synthetic resin film to the back surface of the box body front plate, an appropriate adhesive is applied to the back surface of the box body front plate, and a method of adhering the synthetic resin film thereto, and an adhesive agent is applied in advance. There is a so-called method of sticking a tack film.
In the case of a method of applying an appropriate adhesive to the back surface of the box front plate, the adhesive is applied to surround the engaging insertion portion without applying to the engaging insertion portion. On the other hand, in the case of the method of sticking the tack film, the sticking is performed so as to include the periphery of the engaging insertion portion, but the portion corresponding to the engaging insertion portion of the tack film slides smoothly on the engaging piece. Therefore, it is necessary not to apply the paste, or preferably to set the non-sticking area where paste is slaughtered (varnish is applied to the paste layer).
In the case of the above-described embodiments of FIGS. 8, 9, and 11, the engaging piece is inserted between the box front plate and the synthetic resin film, so that the insertion portion is suitable for the box front plate. In the case of a method of applying a sizing agent, it is necessary not to apply a sizing agent, and in the case of a method of sticking a tack film, it is necessary not to apply a sizing agent or to kill it.

Since the paper container of this invention is comprised as mentioned above, there exist the following effects.
(1) Since the synthetic resin film is stuck from the back surface of the engagement insertion portion, predetermined moisture resistance and sealing performance can be obtained without being bulky.
(2) Since the synthetic resin film is stuck from the back surface of the engagement insertion portion, there is little frictional resistance with the engagement piece inserted into the engagement insertion portion, and the insertion can be performed smoothly.
(3) The upper flap of the box front plate is used only to give strength to the box, and it is not necessary to extend the upper flap of the front plate from the other flaps of the side plate, and is manufactured from a paper material with a small unfolded area. can do.
(4) The means for folding the upper flap of the box body front plate and bonding it to the back surface of the front plate can be produced by a simple method of spraying hot melt as in the past (linear application), so that it is manufactured in a short manufacturing time. Can do. Here, the hot-melt adhesive is a 100% solid adhesive that does not contain any organic solvent mainly composed of a thermoplastic resin. At normal temperature, it is solid or semi-solid, and is heated and melted and applied, and solidified by cooling to complete the adhesion. Therefore, the time from application to completion of adhesion is short. In addition, when folding the upper flap of the front plate of the box and covering the back surface of the engagement insertion part, the emulsion adhesive must be applied in a pattern surrounding the engagement insertion part, It takes time to dry-bond and the manufacturing time becomes longer.

It is a perspective view which shows the open state of a paper container. It is a rear view which shows the closed state of a paper container. It is a perspective view which shows the cover open state of the paper container of another form. It is a figure which shows an example of the front view of the closed state of a paper container. It is a figure which shows an example of the front view of a box. It is a figure which shows the various shapes of a latching insertion part. It is a figure which shows the latching insertion part vicinity of the back side of the front plate of a box. It is sectional drawing which shows the state of one example of engagement. It is sectional drawing which shows the state of the other example of engagement. It is sectional drawing which shows the state of the other example of engagement. It is sectional drawing which shows the state of the other example of engagement.

Explanation of symbols

10: paper container 11: box 11A: box front plate 11F: upper flap of box front plate 12: lid 12A: front plate of lid 13: synthetic resin film 19: engagement piece 19A: base end of engagement piece Part 21: Folding ruled line of engagement piece 22: Knob piece 31: Engagement insertion part 31A: Upper edge part of engagement insertion part

Claims (5)

  A paper container in which a lid covering the top opening of the box is hinged to the back plate of the box, and an engagement piece is formed on the front plate of the lid and closed to the front plate of the box. An engagement insertion portion is formed into which the engagement piece can be inserted in a lid state, the engagement insertion portion is formed through the front plate of the box, and from the back side of the front plate of the box A paper container in which a synthetic resin film covering the engaging insertion portion is attached, and an engaging piece can be inserted into a non-attaching region surrounded by the attaching portion of the synthetic resin film. The paper container according to claim 1, wherein an upper flap extending above the front plate of the box is folded inward to cover and cover a part of the synthetic resin film. The paper container according to claim 1, wherein the synthetic resin film is a tack film, and a varnish is applied to a non-sticking region into which the engagement piece is inserted.   An extension portion is provided on the front plate of the lid, an engagement piece is formed by an upwardly protruding cut line around a base end portion of the extension portion, and the engagement piece is separated from the engagement insertion portion when closing the lid. The paper container according to claim 1, wherein the paper container is inserted and engaged in the upward direction.   2. An engagement piece protrudes from the front plate of the lid via a crease line, and the engagement piece is folded inward by a crease line when the cover is closed, and is inserted and engaged upward from the engagement insertion portion. The paper container in any one of -3.

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