JP2001240041A - Packaging container made of paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging container made of paper wherein an object can be hermetically packaged without a gap occurring due to a thickness of paper at a joint and further a manufacturing cost can be reduced as much as possible. SOLUTION: A lid 20 of the container A is provided integrally with an upper rim of a rear sidewall 4 of a body 1. A first lid receive piece 6 is provided to protrude outward on an upper rim of a front sidewall 3 of the body 1. Second lid receive pieces 7, 7 are provided to protrude outward on upper rims of respective right and left sidewalls 5, 5 of the body 1. A folding piece 8 which has protrusions 9 on respective right and left ends and is longer than the first lid receive piece 6 is connected via a crease 35 with a tip of the piece 6. The joint 10 is extended from a front end rim of the second lid receive piece 7. The folding piece 8 is folded onto a lower surface of the piece 6 and joined therewith. In this joined state, the joint 10 is joined with an upper surface of the protrusion 9 while being aligned with an end face 6a of the piece 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper packaging container for packaging an article to be packaged in a substantially hermetically sealed state, for example, a paper packaging container suitable for packaging take-out food and frozen food.

[0002]

2. Description of the Related Art FIG. 10A shows one of conventional packaging containers for packaging an object to be packaged in a sealed state.

The packaging container (50) shown in FIG. 1 has four front and rear left and right side walls (53) and (54) on the periphery of a rectangular bottom wall (52).
Main body (51) with (55) and (56) arranged side by side in the circumferential direction
And a lid (not shown) separate from the main body (51).

The main body (51) is, as shown in an exploded view in FIG. 1 (b), assembled from one piece of cardboard having a thermoplastic resin layer (F) laminated on both the inner and outer surfaces. Similarly, the lid is made of one piece of square cardboard having a thermoplastic resin layer (F) laminated on both the inner and outer surfaces.

The four side walls (53), (54), (5) of the main body (51)
5) In (56), first lid receiving pieces (57) and (60) are provided on the upper edges of the pair of opposed side walls (53) and (56) so as to protrude outward, and the other pair of opposed side walls (53) and (60) are provided. Side wall (54) (55)
On the upper edge, the second lid receiving pieces (58) and (59) are similarly provided so as to protrude outward.

Further, projecting portions (61) (61) extend from both end edges of the first lid receiving pieces (57) (60), while the second lid receiving pieces (58) (59). The joints (6
2) (62) is extended. Then, the protrusion (6
The first lid receiving pieces (57) and (60) are formed by superimposing the joining portion (62) on the upper surface of 1) and joining them by welding.
And the second lid receiving pieces (58) and (59) are connected and supported to each other,
The first lid receiving piece (57) (60) and the second lid receiving piece (58)
The posture of (59) is maintained. In FIG. 3B, the dotted line indicates a fold.

In the case of packing a package (not shown) using the container (50), first, the package is placed in the main body (51), and then, as shown in FIG. Then, the periphery of the lid (70) is superimposed on the upper surfaces of the lid receiving pieces (57), (58), (59), and (60). Then, in this state, these lid receiving pieces (5) are placed on the receiving die (81) provided in the press welding device.
7) Place (58) (59) (60), lower the press ram (82), and remove the peripheral part of the lid (70) and the lid receiving pieces (57) (58).
(59) and (60) are heated and pressurized to bring the lower surface of the peripheral portion of the lid (70) into close contact with the upper surfaces of the lid receiving pieces (57), (58), (59) and (60). Then, the thermoplastic resin layer (F) on the lower surface of the peripheral portion of the lid (70) and the lid receiving pieces (57), (58), (59)
After the thermoplastic resin layers (F) on the upper surface of (60) are melted together, they lose heat and are fixed, so that the lid (70) is attached to the lid receiving piece (5).
7) Joined to (58), (59), and (60) to package the items to be packaged.

[0008]

As described above, in the above-mentioned conventional container (50), the lid (70) is attached to the lid receiving pieces (57), (58), (59), and (60). A conventional packaging container (50) having such a configuration is intended to pack an article to be sealed in a sealed state by joining by welding.
Had two main drawbacks:

That is, in the conventional packaging container (50), the adjacent lid receiving pieces (57), (58), (59), (60)
As shown in FIG. 10 (a), the connection between the protruding portions (6
Since the joining portion (62) is overlapped and joined to the upper surface of (1), the upper surfaces of the first lid receiving pieces (57) and (60) and the upper surfaces of the second lid receiving pieces (58) and (59) are flat. Not in a row,
That is, a step (65) corresponding to the paper thickness of the joint (62) is formed on the upper surfaces of the lid receiving pieces (57), (58), (59), and (60). When the lid (70) is superimposed on the lid receiving pieces (57), (58), (59), and (60) in the state where the step (65) is generated, the lid (70) and the lid receiving piece (57) (58) (59) (6
0), and as a result, there is a problem that the article to be packaged cannot be packaged in a sealed state.

Further, in the conventional packaging container (50), as shown in FIG. 12, the lid (70) is attached to the lid receiving piece (57).
(58) When trying to peel off from (59) (60), the lower surface portion of the peripheral portion of the lid (70) or the lid receiving piece (57) (58)
(59) Since the upper surface portion of (60) adheres to the counterpart side and may be peeled off with the adhered portion remaining on the counterpart side, the fracture surface (G) of the adhered portion is exposed and the container (50) is exposed. ) Had the drawback that the appearance deteriorated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above technical background, and a first object of the present invention is to prevent the generation of a gap due to the paper thickness of a joining portion and to keep an article to be sealed in a sealed state. It is an object of the present invention to provide a paper container for packaging that can be packaged and that can minimize the production cost as much as possible. Another object of the present invention is to provide a paper packaging container capable of removing the lid from the lid receiving piece neatly.

[0012]

In order to achieve the first object, the invention according to claim 1 comprises: a main body having four or more even-numbered side walls provided on a peripheral edge of a bottom wall in a circumferential direction; A lid, at least the main body is made of paper having a thermoplastic resin layer laminated on the inner surface or the inner and outer surfaces, and the lid is outwardly protruding from the upper edge of each side wall of the main body. The lid receiving piece is joined to an upper surface of the provided lid receiving piece, and the lid receiving piece is a paper packaging container in which first lid receiving pieces and second lid receiving pieces are alternately arranged. A folded piece longer than the first lid receiving piece, having protruding portions at both ends at the end of the first lid receiving piece, is continuously provided via a fold, while the second
A joining portion to be joined to the protruding portion is extended at an edge of the lid receiving piece, and the joining portion is folded and joined to the lower surface of the first lid receiving piece under the condition that the folded piece is folded and joined. It is characterized by being joined to the upper surface of the protruding portion in such a manner as to abut against the end surface of the first lid receiving piece.

According to a second aspect of the present invention, in the first aspect of the present invention, the joining portion has a joining projecting portion projecting toward a middle portion in a longitudinal direction of the first lid receiving piece, and The configuration was adopted in which the edge of one lid receiving piece was formed in a shape corresponding to the shape of the joining protruding portion.

According to a third aspect of the present invention, in the first or second aspect of the invention, the lid is integrally connected to an upper edge of one side wall of the main body.

In order to achieve the second object, the invention according to claim 4 comprises a body having a plurality of side walls provided in a circumferential direction on a peripheral edge of a bottom wall, and a lid. The lid body is made of paper having a thermoplastic resin layer laminated on both the inner surface and the inner and outer surfaces, and the lid is joined to the upper surface of a lid receiving piece provided on the upper edge of each side wall of the main body so as to protrude outward. In the paper packaging container made, the lid is provided with a lid pull-off operation knob, a break connection portion and a break notch that is broken by the pull-off operation of the knob. The breakable connection portion and the break notch are provided at a joint portion with the lid receiving piece and outside the lid receiving piece base end portion, and are provided at the upper surface of the lid receiving piece or the joining portion of the lid body. On the lower surface and from the breaking joint and the breaking cut Also on the outside, a ridge is projected along the breaking connection portion and the breaking notch, and by the ridge,
Than the joining strength between the ridge and the upper surface of the lid receiving piece, the lower surface of the joining portion of the lid and the portion inside the coupling portion for fracture and the cut for fracture and the upper surface of the lid receiving piece. A paper packaging container, wherein the bonding strength is reduced.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the lid is integrally connected to an upper edge of one side wall of the main body.

[0017]

Next, an embodiment of the present invention will be specifically described with reference to the drawings.

FIGS. 1 to 7 show a first embodiment of the present invention. FIG. 1A shows a paper packaging container according to the first embodiment. This packaging container (A)
Is used, for example, to package take-out food and frozen food in a sealed state.

The packaging container (A) is provided with a fold (30) at the periphery of a square bottom wall (2) as shown in a developed view in FIG.
(30) (30) Through (30), front, rear, left and right four side walls (3)
(4) A body (1) in which (5) and (5) are successively arranged side by side in the circumferential direction, and a rectangular lid (20). 1 in which a thermoplastic resin layer (F) having water resistance or oil resistance is laminated
It is assembled from a piece of stiff cardboard.

The four side walls (3) and (4) of the main body (1)
(5) Each of (5) is formed in a tapered shape expanding outward as it goes upward, whereby the main body (1) is a so-called tapered container.

The lid (20) is provided on the four side walls (3).
(4) Among (5) and (5), the upper edge of one of the side walls (4) is integrally provided via a fold (37).

Hereinafter, in this embodiment, for convenience of explanation,
The side wall (4) on which the lid (20) is continuously provided is defined as a rear side wall. Therefore, the side wall (3) facing the rear side wall (4) becomes a front side wall, and the other pair of opposite side walls (5) and (5) becomes a left side wall and a right side wall.

Four side walls (3) and (4) of the main body (1)
(5) In (5), the front side wall (3) and the left side wall (5) are connected to the edges of the side walls (3) (5) via folds (32) (32) and are inclined with respect to each other. A pair of triangular connecting pieces (11a) and (11b), which are continuously provided via the bent fold (31), are bent from the slanted fold (31) to form a two-folded connection. The pieces (11b) are connected to each other by being welded to the outer surface of the left side wall (5). Front side wall (3) and right side wall (5), rear side wall (4) and left side wall (5),
The rear side wall (4) and the right side wall (5) are similarly connected.

Four side walls (3) and (4) of the main body (1)
(5) Of (5), a lid receiving piece (6) is connected to the upper edge of the front side wall (3) so as to protrude outward through a fold (33). Similarly, lid receiving pieces (7) (7) are also provided on the upper edges of the left and right side walls (5) (5) so as to protrude outward through the folds (34) and (34). ing. These three lid receiving pieces (6), (7), (7) are formed by alternately arranging first lid receiving pieces and second lid receiving pieces. In this embodiment, the front lid receiving pieces are provided. The lid receiving piece (6) connected to the upper edge of the piece (3) is the first lid receiving piece, and the left and right side walls (5) and (5)
The lid receiving pieces (7) and (7) connected to the upper edge are used as second lid receiving pieces.

The lid (20) is set to a size that can close the opening of the main body (1). And FIG.
As shown in (a) and (b), the front edge and the left and right edges of the lid (20) are composed of a first lid receiving piece (6) and a second lid receiving piece (7) (7). Is bonded by welding to the upper surface of the main body (1), whereby an article to be packaged (not shown) placed in the main body (1) is packaged in a sealed state. Therefore, in this embodiment, the front edge and the left and right edges of the lid (20) serve as joints (S) with the lid receiving pieces (6), (7), (7).

At the tip of the first lid receiving piece (6), a folded piece (8) is continuously provided via a fold (35). This folded piece (8) has a projection (9)
(9), whereby the folded piece (8) is formed longer than the first lid receiving piece (6).
The folded piece (8) is used as the first lid receiving piece (6).
Is bent back from the fold (35) and joined by welding. In this joined state, the protrusion (9)
The upper surface of (9) is exposed without being covered by the first lid receiving piece (6).

On the other hand, the front end of each of the second lid receiving pieces (7) has a joining portion (1) joined to the upper surface of the projecting portion (9).
0) is extended. The joint (10) is connected to the first
Triangular joining projection (10a) projecting toward the middle in the longitudinal direction (ie, the left-right direction) of the tip of the lid receiving piece (6)
This increases the bonding area of the bonding portion (10). The left and right edges of the first lid receiving piece (6) are cut in a triangular shape corresponding to the shape of the joining projection (10a), whereby the first lid receiving piece (6) is cut out. The left and right edges are formed in a shape corresponding to the shape of the joining protrusion (10a). Further, since the left and right edges of the first lid receiving piece (6) are cut out in this manner, the protruding portion (9) is formed.
The exposed area of the upper surface of the substrate is increased. A joining portion (10) is provided on the upper surface of the projecting portion (9).
a) is abutted on the left and right end surfaces (6a) of the first lid receiving piece (6) and welded together, so that the upper surface of the second lid receiving piece (7) (7) as shown in FIG. Joint (1
The first lid receiving piece (6) is flush with the upper surface via the upper surface of (0). Furthermore, in this joined state, the joint (1
Since the joining projections (10a) of the first lid receiving piece (6) abut against the left and right end faces (6a) of the first lid receiving piece (6), they are joined to the left and right end faces (6a) of the first lid receiving piece (6). There is no gap at all between the end face of the projecting portion (10a). Therefore, when the lid (20) is superimposed on the upper surfaces of the lid receiving pieces (6), (7), and (7), no gap is generated between them, and the lid (20) is tightly fitted. It can be joined.

In the pair of connecting pieces (11a) and (11b), a supporting piece (12) for supporting the second lid receiving piece (7) from below is provided on the upper edge of one connecting piece (11a). Fold (36)
It is provided continuously through. The support piece (12) is bent from the fold (36) and joined to the lower surface of the second lid receiving piece (7) by welding to support the second lid receiving piece (7) from below. are doing. Further, among these four support pieces (12), (12), (12), (12), the length dimension of each one support piece (12) (12) on the front side wall (3) side is the first dimension. The projecting length (that is, the width dimension) of the second lid receiving piece (7) is set to be larger than that of the second lid receiving piece (7), and the distal end of the supporting piece (12) is joined to the lower surface of the second lid receiving piece (7). Department (12
a) protrudes from the tip of the second lid receiving piece (7). The tip (12a) of the support piece (12) is
It plays a role as an auxiliary knob which is pinched at the time of the peeling operation.

A fold (39) provided at the front end of each second lid receiving piece (7) facilitates the assembling operation when assembling the main body (1), as described later. This is a fold to temporarily bend the joint (10), and after assembly, the joint (10) is returned to its original state and folded from this fold (39). That is, the upper surface of the joint (10) is in a state of being flush with the upper surface of the second lid receiving piece (7).

(38) is a fold that is bent when the container (A) is discarded. The container (A) is bent from the fold (38) into a substantially flat shape, thereby obtaining the container (A). Can be discarded in a compact state.

The lid (20) of the container (A) is
The following structure is adopted so that this can be peeled off from the lid receiving pieces (6), (7), (7) neatly.

That is, the lid (20) is provided as shown in FIG.
And (b), two lid pull-off operation knobs (21) and (21), and a plurality of breakers arranged in a line which are broken by the pull-off operation of the knob (21). A connecting portion (22) and a break notch (23) are provided.

The knob (21) is provided at the front edge of each of the right and left edges of the lid (20) (in other words, at the left and right edges of the front edge of the lid) with the second lid receiving piece (7). ) And protrude from the tip of).

The breaking connecting portion (22) and the breaking notch (23) are the left and right edges (S) of the lid (20) and the base end of each second lid receiving piece (7). It is provided along the left and right edges outside of (R). The front ends of the breaking connection portion (22) and the breaking notch (23) are bent toward the edge of the lid (20). Similarly, at the front edge of the lid (20) and outside the base end of the first lid receiving piece (6), the breaking connection portion (22) and the breaking notch (23) are also provided.
Are provided along the front edge. The left and right ends of the break connection part (22) and the break notch (23) are
It is bent towards the edge of 0).

Further, as shown in FIG.
On the lower surface of each of the left and right edges (S) of (0) and outside of the breaking connection portion (22) and the breaking notch (23), a ridge (24) is provided with the breaking connection portion (22). ) And break notches (23)
Are provided close to each other. Similarly, a ridge (2) is provided on the lower surface of the front edge portion of the lid (20) and outside of the breaking connection portion (22) and the breaking notch (23).
4) are provided close to each other along the breaking connection part (22) and the breaking notch (23). This ridge (24) is shown in FIG.
As shown in (b), the cardboard constituting the lid (20) is formed in a substantially arc-shaped cross section by pressing the cardboard in a convex shape from the outer surface (that is, the upper surface) side and locally projecting to the lower surface side. Of a press-formed wire. And this ridge (24)
The right and left edges (S) of the lid (20) and the lower surface of the front edge (S) are smaller than the bonding strength between the ridge (24) and the upper surfaces of the lid receiving pieces (7), (7) and (6). And the joint strength between the part (T) inside the breaking connection part (22) and the breaking notch (23) and the upper surfaces of the lid receiving pieces (7), (7), (6) is reduced. It has a role to make it. It is desirable that the protruding height of the ridge (24) is set to 0.3 to 1.5 mm.

The container (A) is suitable for so-called mechanical bonding in which bending and joining of required portions are mechanically performed from the expanded state. The process will be described with reference to FIG. First, the folded piece (8) is folded from the fold (35) and overlaps the lower surface of the first lid receiving piece (6). Thereby, the upper surface of the protruding portion (9) is exposed. Then, the joint (10) is temporarily bent obliquely upward from the fold (39), and in this state, a pair of connecting pieces (11a) (1
1b) is folded in two from the diagonal fold (31) outward, and each side wall (3) (4) (5) (5) is folded (30) (30) (30) (30) ) And bend up. During the start-up operation, the first lid receiving piece (6) is bent from the fold (33) into an outwardly projecting shape,
After bending the second lid receiving pieces (7) and (7) from the folds (34) and (34) so as to protrude outward, the joint (10) that has been temporarily bent is bent from the fold (39). Fold it back to its original position. Further, the two-folded connecting pieces (11a) and (11b) are bent from the fold (32), and one connecting piece (11b) is overlapped on the outer surface of each of the left and right side walls (5) and (5). By the bending operation of the second lid receiving pieces (7) and (7), the joining portion (10) is formed on the upper surface of the projecting portion (9) of the folded piece (8) by the joining projecting portion (10a). Are overlapped in such a manner as to abut against the end face (6a) of the first lid receiving piece (6), and each support piece (1
2) is bent from the fold (36) and overlaps the lower surfaces of the second lid receiving pieces (7) and (7). In this state, the upper surface of the first lid receiving piece (6) and the second lid receiving piece (7)
The upper surface of (7) is flush with the upper surface of the joint (10).

Next, using a press welding device, the two-folded connection pieces (11) and (11) and the left and right side walls (5) and (5) are pressurized while heating, so that the two-fold connection pieces ( 11a) and (11b) are welded to the outer surfaces of the left and right side walls (5) and (5). This makes the front, rear, left and right four side walls (3) (4)
(5) (5) are connected and supported to each other and are held in the standing posture. Further, the first lid receiving piece (6) and the folded piece (8)
By pressing while heating the joint (10) and the protruding part (9), thereby welding the folded piece (8) to the lower surface of the first lid receiving piece (6). At the same time, the joining portion (10) is welded to the upper surface of the protruding portion (9). Thus, the first lid receiving piece (6) and the upper surfaces of the second lid receiving pieces (7) and (7) are flush with each other via the upper surface of the joint (10) in a state where they are flush with each other. (6) and the second lid receiving pieces (7) and (7) are connected and supported to each other, so that the lid receiving pieces (6), (7) and (7) are held in the outwardly protruding posture. Further, by pressing the second lid receiving pieces (7) and (7) and the supporting pieces (12) while heating, the supporting pieces (12) are welded to the lower surfaces of the second lid receiving pieces (7) and (7). Join. As a result, the second lid receiving pieces (7) and (7) are
2), the container (A) shown in FIG. 1 is further supported from below.

In general, when assembling a paper packaging container with an assembling machine, it is desirable that the number of folded pieces is small. This is because a complicated and expensive assembling machine must be used to fold the folded pieces, so that a large number of folded pieces increases the manufacturing cost. On the other hand, in the enclosing container (A) of the first embodiment, since the number of the folded pieces (8) is only one,
When assembling the packaging container (A), only one portion needs to be folded back. Therefore, this packaging container (A)
According to this, the assembling work can be performed efficiently, and it is not necessary to use a complicated and expensive assembling machine, that is, the assembling operation can be performed using a simple and inexpensive assembling apparatus. Manufacturing costs can be significantly reduced.

Further, in the enclosing container (A), the lid (20) is provided integrally with the upper edge of the rear side wall (4) of the main body (1). It has the advantage of being easy to perform.

Further, in this container for containment (A), since the lid receiving pieces (6), (7) and (7) are provided so as to protrude outward, the shape retention of the main body (1) is improved. ing.

Next, a procedure for packaging the article to be packaged using the container (A) will be described.

First, after the article to be packaged is placed in the main body (1), the lid (20) is folded (37) as shown in FIG.
And the front edge is overlapped on the upper surface of the first lid receiving piece (6), and the left and right edges are overlapped on the upper surface of the second lid receiving piece (7) (7). As described above, the upper surface of the first lid receiving piece (6) and the upper surfaces of the second lid receiving pieces (7) and (7) are flush with each other via the upper surface of the joint (10), and Since the joining projection (10a) of (10) abuts against the end face (6a) of the first lid receiving piece (6), the lid body (20) is attached to the lid receiving pieces (6), (7), (7). ), The lid (20) and these lid receiving pieces (6)
(7) There is no gap between (7) and (7) due to the paper thickness of the joint (10).

In this state, the left and right edges (S) and the front edge (S) of the lid (20) and the lid receiving pieces (7), (7), (6)
And are bonded by welding. This welding method is applied to the lid (20)
When the left and right edges (S) are welded to the second lid receiving pieces (7), (7), the receiving die provided in the press welding device as shown in FIG. Place the second lid receiving piece (7) on the (41), lower the press ram (42) and pressurize the left and right edges of the lid (20) and the second lid receiving piece (7) while heating. Then, the lower surface of each of the left and right edges (S) of the lid (20) is brought into close contact with the upper surface of the second lid receiving piece (7). At this time, since the ridge (24) is provided on the lower surface of each left and right edge (S) of the lid (20), the lower surface of each left and right edge (S) of the lid (20) is Without uniformly contacting the upper surface of the second lid receiving piece (7), the ridge (24) and the upper surface of the second lid receiving piece (7) locally strongly adhere to each other. As a result, the lid ( A portion (T) on the lower surface of each of the left and right edges (S) of (20) and inside the connecting portion for break (22) and the notch for breaking (23) and the upper surface of the second lid receiving piece (7); Is reduced. In this state, the thermoplastic resin layer (F) on the lower surface of each of the left and right edges (S) of the lid (20) and the thermoplastic resin layer (F) on the upper surface of the second lid receiving piece (7) are dissolved. After that, the heat loses and is fixed, so that the left and right edges (S) of the lid (20) are
It is joined to the upper surface of the lid receiving piece (7). Note that, after welding, the ridge (24) is in a crushed state by receiving a pressing force. The front edge of the lid (20) and the first lid receiving piece (6) are joined by the same welding method.
Thus, the left and right edges (S) and the front edge (S) of the lid (20) are joined to the lid receiving pieces (7), (7), (6), and the packaged object put in the main body (1) Are packaged in a sealed state.

At the joint between the lid (20) of the container (A) and the lid receiving pieces (7), (7), (6), the lid (20)
A portion (T) on the lower surface of each of the left and right edges (S) and the front edge (S) and inside the breaking connection portion (22) and the breaking notch (23); (7) Since it is joined to the upper surface of (6) in a state where the degree of adhesion is reduced, the joining strength is low. On the other hand, the joining strength between the ridge (24) and the upper surfaces of the lid receiving pieces (7), (7), and (6) is higher than other parts.

When peeling off the lid (20) of the container (A), as shown in FIGS. 6 (a) and 6 (b), first, the tip (12a) of the support piece is picked with one hand. Then, the main body (1) is fixed, and the knob (21) of the lid (20) is picked with the other hand. Then, the lid (20) is peeled off from the knob (21). By this peeling operation, the left and right edges (S) of the lid (20) are successively broken while the breaking connecting portion (22) is broken.
And the lower surface of the front edge (S) and the connecting portion (2
2) and the portion (T) inside the break notch (23)
The lid receiving pieces (7), (7), and (6) are peeled off from the upper surfaces. As described above, this portion (T) has a bonding strength with the upper surfaces of the lid receiving pieces (7), (7) and (6),
4) is lower than the joining strength between the upper surfaces of the lid receiving pieces (7), (7), and (6). Therefore, during the peeling operation, this part (T) becomes the lid receiving pieces (7), (7). And (6) there is no risk of adhering and remaining on the upper surface of (6). In addition, since there is no possibility that the upper surface portions of the lid receiving pieces (7), (7), and (6) adhere to and remain at this portion (T), the lid body (20) can be peeled off cleanly.

FIGS. 8 and 9 show a packaging container (B) according to a second embodiment of the present invention. In these drawings, the same components as those of the enclosing container (A) of the first embodiment are denoted by the same reference numerals. Hereinafter, the enclosing container (B) of the second embodiment will be referred to as the first container. The following description focuses on differences from the embodiment (A).

In this packaging container (B), the lid (20) is separate from the main body (1), and the upper edge of the rear side wall (4) of the main body (1) , First lid receiving piece (6)
Are connected to each other so as to protrude outward through a fold (33). The configuration of the first lid receiving piece (6) is the same as the configuration of the first lid receiving piece (6) provided on the upper edge of the front side wall (6). That is, at the front end of the first lid receiving piece (6), there are protruding portions (9) (9) at both left and right edges, and the folded piece (8) longer than the first lid receiving piece (6). Is a fold (35)
It is provided continuously through. And this folded piece (8)
Are folded back on the lower surface of the first lid receiving piece (6) and joined by welding. On the other hand, a joining portion (10) having a joining protrusion (10a) extends from the rear end edge of each second lid receiving piece (7). Then, the joining portion (10) is provided on the upper surface of the projecting portion (10) of the folded piece (8) by the joining projecting portion (10a).
Are abutted against the end face (6a) of the first lid receiving piece (6) and are joined by welding. In this joined state, the first
Upper surface of lid receiving piece (6) and second lid receiving piece (7)
The upper surface of (7) is flush with the upper surfaces of the joints (10), (10), (10), and (10). When joining the lid (20), the front and rear edges and the left and right edges of the lid (20) are connected to the first lid receiving pieces (6) and (6) and the second lid receiving pieces (7) and (7). )
By overlapping the lid (20) on the upper surfaces of the lid receiving pieces (6), (6), (7), and (7) by welding, the packaged object can be packaged in a sealed state. You can do it.

In the packaging container (B) of the second embodiment, the folded pieces (8) and (8) have four side walls (3) and (4).
(5) Since it is provided at two places of the front side wall (3) and the rear side wall (4) of (5), when assembling this packaging container (B), only two places are folded back. Since the assembling operation can be performed efficiently and the assembling operation can be performed using a simple and inexpensive assembling apparatus, the manufacturing cost can be reduced.

The embodiment of the present invention has been described above.
The present invention relates to the first and second embodiments (A)
It is not limited to (B).

For example, the container may be made of paper having a thermoplastic resin layer laminated only on the inner surface.

The number of side walls is 4 in this embodiment.
In the first to third aspects of the present invention, six, eight, ten
, Or in the inventions of claims 4 and 5, 3
The number may be individual or five or more.

In this embodiment, the ridge (24) is provided on the lower surface of the joint (S) of the lid (20).
According to the fourth and fifth aspects, the lid receiving pieces (6) and (7) are provided.
It may be provided on the upper surface of (7). In addition, the breaking connection part (22) and the breaking notch (23) are provided with a breaking notch from one side to the middle part in the thickness direction in the cardboard constituting the lid (20) of the container (A). It may be formed of a half-cut line formed in this manner.

[0053]

As described above, the paper packaging container according to the first aspect of the present invention has at least a main body made of paper having a thermoplastic resin layer laminated on the inner surface or the inner and outer surfaces. Can be discarded as a combustible material, and it has the advantage that the discarding process is simple. In addition, the tip of the first lid receiving piece has protrusions at both end edges and is longer than the first lid receiving piece. In the state where the folded pieces are continuously provided via the fold, the joining portion is extended at the edge of the second lid receiving piece, and the folded piece is folded and joined to the lower surface of the first lid receiving piece. Since the joining portion is joined to the upper surface of the protruding portion in such a manner as to abut against the end surface of the first lid receiving piece,
Since the lid can be joined in a state where the upper surface of the first lid receiving piece and the upper surface of the second lid receiving piece are flush with each other via the upper surface of the joining portion, the packaged object is sealed. It has the advantage that it can be packaged in a state.

Further, the folded piece is one of the three lid receiving pieces of the first lid receiving piece and the second lid receiving pieces on both sides thereof.
Since it is provided only on the individual (first lid receiving piece), the number of folded pieces can be reduced as much as possible. As a result, this packaging container can be assembled using a simple and inexpensive assembly machine. As a result, there is an advantage that the manufacturing cost can be reduced.

The joining portion has a joining projecting portion projecting toward the intermediate portion in the length direction of the first lid receiving piece.
When the end of the first lid receiving piece is formed in a shape corresponding to the shape of the joining protrusion, the joining area of the joining portion increases because the joining portion has the joining protrusion. The joining portion can be firmly joined to the upper surface of the projecting portion, so that the first lid receiving piece and the second lid receiving piece can be firmly connected.

When the lid is integrally connected to the upper edge of one side wall of the main body, it is not necessary to separately manufacture the main body and the lid, thereby improving the productivity. Also, since the number of parts is reduced, there is an advantage that the parts can be easily managed.

In the paper packaging container according to the fourth aspect of the present invention, at least the main body is made of paper having a thermoplastic resin layer laminated on the inner surface or both the inner and outer surfaces. Similarly to the above, the main body can be discarded as a combustible material, and it has the advantage that the discarding process is simple, and it is also the upper surface of the lid receiving piece or the lower surface of the joint portion of the lid and the connecting portion for breaking and A ridge is provided on the outer side of the break notch along the connecting portion for break and the cut for break, and the protrusion is used to bond the lid body more than the bonding strength between the protrusion and the upper surface of the lid receiving piece. Since the joining strength between the upper surface of the lid receiving piece and the lower surface of the part and inside of the connecting portion for fracture and the cut for fracture and the upper surface of the lid receiving piece is made to be reduced, the lid is peeled off. During operation, this part is attached to the top It is not left would risk to, nor left would possibly adhering the upper surface portion of the lid receiving pieces at this site. Therefore, according to the present invention, the lid can be peeled off neatly, and the appearance of the container after the lid has been peeled off can be kept good.

[Brief description of the drawings]

FIG. 1 is an overall perspective view and a partially enlarged perspective view of a paper packaging container according to a first embodiment of the present invention.

2A is a top view of a main body of the container, and FIG. 2B is a side view of the main body of the container.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a perspective view of the container during assembly.

FIG. 5A is a perspective view showing a state in which the lid of the container is being overlapped and joined to a lid receiving piece, and FIG. 5B is a perspective view of V in FIG.
FIG. 5 is a sectional view taken along line V.

FIG. 6A is a perspective view of a state in which the lid of the container is being peeled off, and FIG. 6B is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a development view of the container.

FIG. 8 is an overall perspective view of a paper packaging container according to a second embodiment of the present invention.

FIG. 9 is a development view of a main body of the container.

FIG. 10 is a view showing a conventional container, (a) is a perspective view of a main body of the container, and (b) is a developed view of the main body of the container.

FIG. 11 is a cross-sectional view showing a state in which the lid of the container is being overlapped with and joined to a lid receiving piece.

FIG. 12 is a sectional view showing a state in which the lid of the container is being peeled off.

[Explanation of symbols]

 A, B ... paper packaging container 1 ... main body 3 ... front side wall 4 ... rear side wall 5 ... left and right side walls 6 ... first lid receiving piece 7 ... second lid receiving piece 8 ... folded piece 9 ... protruding part 10 ... joining Part 10a: Projecting part for joining 20 ... Lid 21 ... Knob for peeling off lid 22: Breaking connection part 23 ... Cut notch 24 ... Protrusion 30-39 ... Fold

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B65D 5/62 B65D 5/62 A 5/64 5/64 A 5/66 301 5/66 301A 5/74 5/74 GF term (reference) 3E060 AA08 AB15 BA01 BA22 BC01 CE04 CE07 CE13 CE22 CF05 CG10 CG12 DA18 EA06 EA13 3E075 AA05 BA07 BA22 BB02 CA01 DD13 DD45 DD47 GA04

Claims (5)

[Claims] 1. A body (1) provided with four or more even-numbered side walls (3), (4), (5) and (5) on the periphery of a bottom wall (2) in a circumferential direction, and a lid. (20), at least the main body (1) is made of paper having a thermoplastic resin layer (F) laminated on the inner surface or the inner and outer surfaces, and the lid (20) is formed of the main body (1). ) Is joined to the upper surface of a lid receiving piece provided on the upper edge of each side wall so as to protrude outward, and the lid receiving piece is composed of a first lid receiving piece (6) and a second lid. In the paper packaging containers (A) and (B) in which the receiving pieces (7) and (7) are alternately arranged, a protruding portion (9) is provided at the front end of the first lid receiving piece (6) and at both end edges. A folded piece (8) having a length longer than the first lid receiving piece (6) is continuously provided through a fold (35), and the protruding portion is provided on an edge of the second lid receiving piece (7). Join to (9) Joint (10) is extended to the folded piece (8) is under wraps to lower surface state of being bonded in the first cover bearing piece (6), the joint (1
0) is joined to the upper surface of the protruding portion (9) in such a manner as to abut against the end surface (6a) of the first lid receiving piece (6). 2. The joining portion (10) has a joining protruding portion (10a) projecting toward a longitudinal middle portion of the first lid receiving piece (6), while the first lid receiving piece is provided. The paper packaging container according to claim 1, wherein the edge of (6) is formed in a shape corresponding to the shape of the joining projection (10a). 3. The paper packaging container according to claim 1, wherein said lid (20) is integrally connected to an upper edge of one side wall (4) of said main body (1). 4. A plurality of side walls (3) around the periphery of the bottom wall (2).
(4) A body (1) in which (5) and (5) are provided side by side in the circumferential direction, and a lid (20), and at least the body (1) has a thermoplastic resin layer on an inner surface or both inner and outer surfaces. (F) is manufactured from the laminated paper, and the lid (20) is provided on the upper edge of each side wall of the main body (1) so as to protrude outward. ) (7)
In the paper packaging containers (A) and (B) joined to the upper surface of (7), the lid (20) is provided with a lid peeling operation knob (21).
And a breaking connection part (22) and a breaking cut (23) that are broken by the peeling operation of the knob, and the breaking connecting part (22) and the breaking cut (23) are
A joining portion (S) with the lid receiving piece and provided outside the lid receiving piece base end (R), and an upper surface of the lid receiving piece or a lower surface of a joining portion of the lid body; Break connection (22) and break notch (23)
A ridge (24) is protruded outside the rupture connecting portion (22) and the nick (23) for rupture, and the ridge (24) and the lid support are provided by the ridge (24). More than the bonding strength with the upper surfaces of the pieces (6), (6), (7), and (7),
A portion (T) on the lower surface of the joining portion (S) of the lid and inside the breaking connection portion (22) and the breaking notch (23) and the lid receiving pieces (6), (6), (7) (7) A paper packaging container characterized in that the bonding strength with the upper surface of (7) is reduced. 5. The paper packaging container according to claim 4, wherein said lid (20) is integrally connected to an upper edge of one side wall (4) of said main body (1).