JPH0748502Y2 - Packaging box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a packaging box used for packaging various interior components.

[Prior Art] Various interior products such as foods and medicines are generally stored in a paper packaging box. The outer shape of a paper-made packaging box is often a rectangular parallelepiped, and processed paper having elasticity to some extent is cut into a predetermined size, bent, and bonded to form the paper.

In this paper packaging box, four rectangular side plates are connected through folding lines, and the folding line portions are bent to form a tubular main body having a rectangular cross section. Openings at both ends of the tubular main body are formed. The end plate for sealing the portion is formed by bending a folding flap integrally formed with the side plate through a folding line.

The paper packaging box having such a tubular body and end plate has a rectangular parallelepiped shape so that various interior items can be easily accommodated or taken out and the interior items can be sufficiently protected. Need to keep. Further, since the paper packaging box is also used as a disposable container, it is desirable that it has a structure that can be easily and inexpensively processed.

(Problems to be solved by the invention) However, in a conventional paper packaging box, a folding flap provided at an end portion of a side plate is folded and an end plate for sealing an opening portion on a top surface side or a bottom surface side is folded. When formed, since the folding flap is made of elastic processed paper, there is a problem that it deforms after sealing or cannot be reliably sealed when sealing.

Further, if a structure capable of performing reliable sealing is adopted, means for performing sealing against the elasticity is required, and thus there is a possibility that inexpensive production may be impossible. In addition,
There is a similar problem on the bottom side of the paper packaging box.

The present invention solves various drawbacks and problems associated with the above-mentioned conventional techniques, and the top surface side of a cylindrical main body formed by connecting four rectangular side plates via a fold line by an end plate of a container. Another object is to provide an excellent packaging box that can reliably seal the opening on the bottom side.

[Means for Solving the Problem] (Means for Solving the Problems) In order to achieve the above object, the present invention has a configuration in which four rectangular side plates made of a material having elasticity to some extent are connected to each other through a fold line to form a cylinder. In a rectangular parallelepiped packaging box that forms a cylindrical main body, and seals both ends of the cylindrical main body with end plates integrally formed with the side plates via folding lines, the one end plate is the side plate. A two-stage folding flap having a first folding line and a second folding line is provided at one end of the inside,
The two-stage folding flap has a notch having a width cut on the line of the second folding line, and a side plate facing the side plate provided with the two-fold folding flap has a width larger than the width. The packaging box is characterized in that it has an engaging portion having and an insertion head formed by forming a notch between the engaging portion and the base end portion.

The other end plate includes a first folding flap bent inward from the ends of a pair of opposing side plates of the four rectangular side plates and an inward direction from the ends of the remaining side plates. A second folding flap, wherein the first folding flap is substantially trapezoidal, and its side edges are diagonal sides extending along the diagonal line of the rectangle, and the second folding flap is substantially triangular. Then, one side edge is a diagonal side extending along the diagonal line of the rectangle, and an adhesive piece extending substantially at a right angle through a fold line is projectingly provided at the center of the diagonal side of the adhesive piece. By adhering the first folding flap so that the diagonal sides are in a superposed state and fitting the recesses formed between the first folding flap and the second folding flap and the adhesive piece. It is a packaging box characterized by being formed.

(Operation) In the present invention configured as described above, the end opening on one surface side of the packaging box is designed to be inserted into the notch groove of the two-step folding flap so as to seal the side surface. The airtightness can be surely sealed.

In addition, since the bottom surface side end plate is formed by the first and second bottom surface members and is sealed by this end plate, the opening portion on the other surface side of the container ensures the airtightness and rigidity. Can be

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic perspective view showing an entire packaging box according to the present invention, FIG. 2 is a developed view of FIG. 1, FIG. 3 is an explanatory view showing a top side end plate, and FIG. It is a bottom view of FIG.

In FIG. 1, the packaging box 10 is composed of a tubular body 20, a square top surface side end plate 30 and a bottom surface side end plate 40, and the whole is made of a material having elasticity to some extent, such as paper. Is preferred.

The tubular body 20 is composed of four rectangular side plates 21 in FIG.
To 24 are mountain-folded along the folding lines 21a to 24a to form a square section, and the opening portions at both ends of the tubular body 20 are sealed by the end plates 30 and 40.

The side plate 21 is provided with a joint margin 25, and is bonded to the side plate 24 on the opposite side.

At the top of the side plate 21, there is a fold line 31 that is mountain-folded in the center.
The insertion head 31 is provided via a, and folding flaps 32, 33, 34 are mountain-folded at the tops of the side plates 22, 23, 24, respectively.
It is provided via 32a, 33a, 34a. These folding flaps 32, 33, 34 form a ceiling-side end plate 30 that closes one end opening of the tubular body 20 when bent at the folding line.

A two-stage folding flap 33 is provided at the top of the side plate 23 facing the insertion head 31, and the two-stage folding flap 33 has the folding line 33a and the ceiling side end plate 30 from the position of the folding line 33a. The second folding line 33b is provided at a position having the same length as the side a.

A notch 35 having a width of 1 is cut in the center of the second folding line 33b on the line, and the notch 31 is inserted into the notch 35. The insertion head 31 has an engaging portion 31a having a width L larger than the width 1 of the notch groove 35, and a notch K is formed between the engaging portion 31a and the base end portion. Therefore, when inserting the insertion head 31 into the cutting groove 35, the elasticity of the insertion head 31 temporarily reduces the width, and after fitting, the engaging portion 31a is locked in the cutting groove 35 by returning to the original shape. I am trying to do it.

On the other hand, the second folding flaps 41, 43 are provided at the bottoms of the side plates 21, 23.
The first folding flaps 42 and 44 are provided at the bottoms of the side plates 22 and 24, and the bottom side end plate 40 that closes the bottom side opening is formed by the main and sub flaps 41 to 44.

The first folding flaps 42 and 44 are substantially trapezoidal with the hypotenuses 42b and 44b, and the second folding flaps 41 and 43 are bent lines 41 to the hypotenuses 41b and 43b.
Protrusions 41d and 43d are provided via c and 43c, and the tip is an arc line.
It is formed on 41c and 43e. The protrusions 41d, 43d are broken lines 41c,
It has side edges 41f and 43f orthogonal to 43c.

First folding flaps 42,44 and second folding flaps 41,43 are broken lines
42a, 44a and 41a, 43a are folded inward.

As shown in FIG. 4, the protrusion 41d is adhered to the first folding flap 42 so that the side edge 41f and the oblique side 42b are aligned with each other.
Forming the bottom surface member 45 of the projection 43d.
A second bottom surface member 46 is formed by being bonded to the first folding flap 44 in a state of being aligned with 44b. Then, as shown in FIG. 5, when the first bottom surface member 45 and the second bottom surface member 46 are overlapped with each other, both bottom surfaces are fitted so as to fit into the recess 43g between the arc edge 41e and the side edge 41f. When the members 45 and 46 are combined together, the bottom end plate 40 is formed.

To assemble the packaging box 10 configured in this way, the side plate 21 ~
Fold 24 into a cylinder. In this state, it is often convenient later that the joint margin 25 is not adhered to the side plate 24.

In this state, first, to form the bottom end plate 40, the first folding flaps 42 and 44 and the second folding flaps 41 and 43 are formed.
Are folded inward along fold lines 42a, 44a and 41a, 43a, respectively.

Then, as shown in FIG. 4, with the side edge 41f and the oblique side 42b aligned, the protrusion 41d is bonded to the first folding flap 42 to form the first bottom member 45. Similarly, with the side edge 43f and the oblique side 44b aligned, the protruding piece 43d is adhered to the first folding flap 44 to form the second bottom surface member 46.

Next, as shown in FIG. 5, when the first bottom surface member 45 and the second bottom surface member 46 are overlapped with each other, the recess 41g between the arc edge 41e and the side edge 41f, the arc edge 43e and the side edge are formed. Both bottom surface members 45 and 46 are united so as to fit the recess 43g between the bottom surface members 43 and 43f.

After forming the bottom side edge plate 40 in this manner, the joint margin 25
By adhering to the side plate 24, a box-like object is formed.

Next, if the ceiling side end plate 30 is formed, the box body is completed, but before that, that is, in the state where the ceiling side is open, as shown in FIG. On arrow B
When a force is applied from the −B direction, the first bottom surface member 45 and the second bottom surface member 46 are valley-folded along the fold lines 41c and 43c, and moreover, they are in sliding contact with each other at the arc edges 41e and 43e, so that the concave portion is formed. 41g and 43g are disengaged, and the flat bottom end plate 4 is easily
It collapses to 0 and folds flat along with the side surface 20, making it convenient to store and stack the packaging box 10.

When a force in the direction of arrow AA is applied to the ridge portion of the side surface 20, the concave portions 41g and 43g of the first bottom surface member 45 and the second bottom surface member 46 are engaged, and the bottom surface side end plate 40 self-closes. As a result, the bottom end plate 40 of the container 10 is smoothly closed, and the bottom end plate 40 increases the rigidity of the container 10 and makes it stronger.

To form the ceiling-side end plate 30, as shown in FIG. 3, the folding flaps 31 and 34 are also mountain-folded and folded at right angles to the side plates 22 and 24, respectively. Further, the two-stage folding flap 33 is overlapped inward at a right angle with the side plate 23 and folded, and the joint margin 33c is folded inward along the second folding line 33b so as to be positioned on the back surface of the side plate 21.

By doing this, the cut groove 35 and the insertion head 31 are located at opposite positions, so that the insertion head 31 is inserted into the cut groove 35 and the end surface of the packaging box 10 is closed.

In this case, although the insertion head 31 is provided with the notch K in the base end portion, the maximum width dimension L of the base end portion is larger than the length l of the insertion head 31, and therefore the insertion head 31 is temporarily reduced. Elastically deformed to the width, fitted into the notch groove 35 of the insertion head 31, and then returned to the original shape, the notch K is locked in the notch groove 35,
The ceiling-side end surface 30 is surely closed.

Although the above-mentioned embodiment uses paper,
The present invention may use not only such paper but also various materials such as synthetic resin materials such as polypropylene.

[Effect of the Invention] As described above, according to the present invention, the end surface of the packaging box is
When inserting the insertion head into the notch of the folding flap, a notch is provided at the base of this insertion head, so the box can be assembled securely without loosening, and the bottom side edge of the packaging box Since the plate has a structure in which the bending of the first and second bottom members and the self-closing can be selected, the plate can be made flat with a packaging box having a predetermined volume, and the storage efficiency at the time of transportation is improved. Not only that, there is no problem in using it.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing the entire packaging box according to the present invention, FIG. 2 is a developed view of FIG. 1, FIG. 3 is an explanatory view showing a ceiling side end plate, and FIG. FIG. 5 is a bottom view of the figure, and FIG. 5 is a perspective view showing a state where the packaging box is being assembled. 10 …… Packing box, 30 …… End face, 31 …… Inset head, 32,33,34…
… Flap, 33a …… first folding part, 33b …… second folding part,
35 ... Notch groove, 40 ... Bottom end plate, 41,43 ... Second folding flap, 42,44 ... First folding flap, 41b, 43b ... Oblique side, 41c, 43c ... Folding line, 41d , 43d …… Protrusion, 41e, 43e ……
Arc line, 45 ... First bottom member, 46 ... Second bottom member.

Claims (2)

[Scope of utility model registration request] 1. A tubular main body (20) is formed by connecting four rectangular side plates (21 to 24) made of a material having elasticity to some extent through folding lines (21a to 24a). A rectangular parallelepiped-shaped packaging box in which both ends of a main body (20) are sealed by end plates (30, 40) integrally formed with the side plates via folding lines (31a to 34a). (30)
Is provided with a two-stage folding flap (33) having a first folding line (33a) and a second folding line (33b) at one end of the side plates (21 to 24). The (33) has a notch groove (35) having a width (l) cut on the line of the second folding line (33b), and a side plate (23) provided with the two-stage folding flap (33). ) Has an engaging portion (31a) having a width (L) larger than the width (l) and a notch between the engaging portion (31a) and the base end portion. A packaging box provided with an insertion head (31) formed by forming (K). 2. The other end plate (40) is bent inward from the ends of a pair of side plates (22, 24) facing each other among the four rectangular side plates (21-24). 1st flap (42,4
4) and second folding flaps (41, 43) bent inward from the ends of the remaining side plates (21, 23), and the first folding flaps (42, 44) are substantially It is trapezoidal, and its side edges are diagonal sides (42b, 44b) extending along the diagonal line of the rectangle, the second folding flaps (41, 43) are substantially triangular, and one side edge is the diagonal line of the rectangle. Diagonal side extending along (41b, 43
b) and at the center of this diagonal side (41b, 43b)
Adhesive pieces (41d, 43d) that extend in a substantially right angle direction via c)
And project the adhesive pieces (41d, 43d) and the first folding flaps (42, 44) on the diagonal sides (41b, 43b and 42b, 44b).
And the recesses (41g, 43g) formed between the first folding flaps (42, 44) and the second folding flaps (41, 43) and the adhesive pieces (41d, 43d) while being bonded so that 3. The packaging box according to claim 1, wherein the packaging box is formed by fitting them together.