JP3201982U - Simple lock packaging box - Google Patents

Abstract

To provide a simple lock-type packaging box that can be reliably sealed by a simple operation, has excellent load resistance in a sealed state, and can be easily opened. In a packaging box, a pair of side plates 1 and end plates 2 are connected in series in the circumferential direction, an outer lid flap 4 is connected to the upper end of the side plate 1, and an inner lid flap 5 is connected to the upper end of the end plate 2. The pair of outer lid flaps 4 are provided with leading end convex portions 8a and 8b at the middle portion and both side portions of the leading end edge, respectively, and side end convex portions 9 are provided at the side end edges of the outer lid flap 4. It is assumed that the flap 5 is formed with an engagement notch 10 whose both end portions are bent in a direction away from the end plate 2, and a pressing piece 11 facing the intermediate portion is formed in a direction protruding from the end plate 2. The tip convex portions 8a and 8b overlap each other at the middle and both sides of the tip edge of the outer lid flap 4, the side edge convex portion 9 of the outer lid flap 4 is held by the pressing piece 11, and the sealed state is maintained. When 11 is pushed down, it is opened. [Selection] Figure 5

Description

  The present invention relates to a simple lock-type packaging box that can be sealed without using a sealing material such as a tape.

  As a simple lock-type packaging box, the following Patent Document 1 describes the one shown in FIG. The packaging box has a basic configuration in which a pair of side plates 51 and end plates 52 are connected in the circumferential direction, an outer lid flap 53 is connected to the upper end of the side plate 51, and an inner lid flap 54 is connected to the upper end of the end plate 52. It is said that.

  The pair of outer lid flaps 53 of the packaging box are provided with front end convex portions 55 that alternately protrude from approximately half of the front end edge, and the side end of the outer lid flap 53 where the front end convex portion 55 exists is located on the side end. An end convex portion 56 is provided. The inner lid flap 54 is provided with slit-like engagement cuts 57 along the boundary with the end plate 52. The engagement cuts 57 bend in a direction in which both end portions are separated from the end plate 52, and the intermediate portion is straight. And approaching the end plate 52.

  In the above-mentioned simple lock type packaging box, when packaging an article, the inner lid flap 54 and the outer lid flap 53 are sequentially folded, the tip protrusions 55 of the pair of outer lid flaps 53 are engaged with each other, and the outer lid flap 53 The side end convex portion 56 is engaged with the engagement cut 57 of the inner lid flap 54. Thereby, a sealing state can be maintained, without using sealing materials, such as a tape.

Japanese Utility Model Publication No. 58-116514

  However, in the simple lock type packaging box as described above, if the side end convex portion 56 is inserted deeply into the engagement cut 57 in order to ensure sealing, the outer lid flap 53 and the inner lid flap are sealed at the time of sealing. It is necessary to bend 54 greatly, and sealing work becomes difficult.

  Further, in the distribution process, when a load acts on the top surface, the outer lid flap 53 may sink near the middle portion of the tip edge.

  Moreover, when opening, it must raise so that the front-end | tip convex part 55 of a pair of outer cover flap 53 may be pinched, and there exists a problem that opening is difficult.

  Therefore, an object of the present invention is to provide a simple lock-type packaging box that can be reliably sealed with a simple operation, has excellent load resistance in a sealed state, and can be easily opened.

  In order to solve the above-described problems, the present invention is such that a pair of side plates and end plates are connected in the circumferential direction, an outer cover flap is connected to the upper end of the side plate, and an inner cover flap is connected to the upper end of the end plate. In the packaging box, the pair of outer lid flaps are respectively provided with tip convex portions at the intermediate portion and both side portions of the tip edge, and side end convex portions are provided at the side edge of the outer lid flap. Is formed with an engagement notch that is bent in a direction in which both ends are separated from the end plate, and a pressing piece facing the intermediate portion is formed in a direction in which it protrudes from the end plate. The end convex portions overlap with each other, the side end convex portions of the outer lid flap are engaged with the engagement notches, are held by the pressing pieces, and the sealed state is maintained. When the pressing pieces are pushed down, the side end convex portions and the pressing pieces The engagement is released and the bag is opened.

  In the simple lock-type packaging box according to this device, when the side end portions of the pair of outer lid flaps are pushed down at the time of sealing, the side end convex portions are buried below the pressing pieces of the inner lid flap. The lid can be easily sealed without greatly bending the lid flap, and the sealed state can be maintained without using a sealing material such as a tape.

  In addition, since the front end convex portions overlap each other at the middle portion and both side portions of the front end edge of the outer lid flap in the sealed state, the outer lid flap is less likely to sink even if a load acts on the top surface.

  Further, when opening, only by pressing down the pressing piece of the inner lid flap, the engagement between the side end convex portion of the outer lid flap and the pressing piece is released, so that the opening can be easily performed.

The figure which shows the blank of the simple lock type packaging box which concerns on embodiment of this invention The perspective view which shows the top surface open state after an assembly same as the above. The perspective view which shows the sealing operation | movement in the sealing process same as the above. The expanded sectional view which shows the engaging part of a side edge convex part same as the above, and a press piece. The perspective view which shows the sealing state and opening operation same as the above The perspective view which shows the sealing state of the simple lock type packaging box of patent document 1

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  This simple lock packaging box is assembled from a cardboard blank as shown in FIG. In this blank, a long side plate 1 and a width side end plate 2 are alternately connected in pairs, and a passage piece 3 is connected to the outer end of one side plate 1. The pair of side plates 1 and end plates 2 are respectively provided with an outer lid flap 4 and an inner lid flap 5 at the upper end, and bottom flaps 6 and 7 at the lower end, respectively.

  The edge of the outer lid flap 4 has a wave-like irregular shape, and tip protrusions 8a and 8b are provided at the middle and both sides of the tip edge of the pair of outer lid flaps 4, respectively. The side end convex part 9 is provided.

  When the tip edge of the outer lid flap 4 is based on the valley between the tip convex portions 8a and 8b, the tip convex portion 8a of one outer lid flap 4 is the tip convex portion 8a of the other outer lid flap 4. The protrusion dimension 8b of one outer lid flap 4 is slightly shorter than the protrusion protrusion 8b of the other outer lid flap 4.

  The pair of inner lid flaps 5 are formed with an engagement notch 10 whose both ends are bent in a direction away from the end plate 2 near the boundary with the end plate 2 so as to face an intermediate portion of the engagement notch 10. A pressing piece 11 having an arcuate end edge is formed in a direction to protrude from the end plate 2.

  Further, in the pair of inner lid flaps 5, a valley fold line 12 parallel to a ruled line at the boundary with the end plate 2 is put between both side edges and both ends of the engagement cut line 10. The lead ruler is an intermittent cut and cut. Furthermore, between the both ends of the engagement cut | interruption 10, the weakening line 13 in which a fine cut | interruption is interrupted is put.

  In such a blank, each pair of side plates 1 and end plates 2 is folded along a border line that is a diagonal position, and the passage piece 3 is attached to the opposite end plate 2 to make a flat fold. Leave it in a state.

  Then, when assembling the packaging box from the folded state and wrapping the article, as shown in FIG. 2, each pair of side plates 1 and end plates 2 is three-dimensionalized to form a square cylinder, and the bottom flap 6, In a state where the bottom surface is closed by meshing 7, the article is accommodated in the box through the opening on the top surface.

  Next, as shown in FIG. 3, the inner lid flap 5 and the outer lid flap 4 are sequentially folded, and the shorter one of the opposing front end convex portions 8 a and 8 b of the pair of outer lid flaps 4 on the longer inner surface. The tip protrusions 8a and 8b are meshed with each other while sliding along the tip of each other.

  In this state, as shown by arrows in FIGS. 3 and 4, when the overlapping side end portions of the pair of outer lid flaps 4 are pushed down, the outer lid flaps 4 bend and the side end convex portions 9 become the inner lid flaps 5. It enters the engagement cut 10 and sinks below the pressing piece 11.

  At this time, the inner lid flap 5 bends along the valley fold line 12 and slightly bends along the weakening line 13, so that the engagement cut 10 opens widely and the side end convex portion 9 easily enters the engagement cut 10. .

  Thereafter, when the pressing of the outer lid flap 4 is stopped, the bending of the outer lid flap 4 and the inner lid flap 5 is elastically restored as shown in FIG. 5, and at the middle and both sides of the front edge of the outer lid flap 4 The front end convex portions 8a and 8b overlap each other, the side end convex portions 9 of the pair of outer lid flaps 4 engage with the engagement cuts 10, and are held by the pressing pieces 11 so that the top surface is closed. .

  As described above, in the simple lock type packaging box, the side end convex portion 9 of the outer lid flap 4 is engaged with the engagement cut 10 of the inner lid flap 5 without greatly bending the outer lid flap 4 and the inner lid flap 5. The sealing state can be easily maintained without using a sealing material such as a tape.

  Further, in this sealed state, the tip convex portions 8a and 8b overlap each other at the intermediate portion and both side portions of the front end edge of the outer lid flap 4, so even if a load acts on the top surface during the distribution process, The lid flap 4 is less likely to sink, and damage to items such as agricultural products housed in the box can be prevented.

  On the other hand, when opening the simple lock-type packaging box, as shown by an arrow in FIG. 5, the pressing piece 11 is simply pushed down on the inner lid flap 5, and the pressing piece 11 is protruded from the side end of the outer lid flap 4. 9 and the engagement between the side end convex portion 9 and the pressing piece 11 is released, so that it can be easily opened.

  In the above embodiment, the side end convex portions 9 are provided on the both side edges of the pair of outer lid flaps 4, but the side end convex portions 9 are included in the pair of outer lid flaps 4. In the sealed state, it may be provided only where the tip convex portion 8b overlaps upward.

  Moreover, although the thing which put the valley fold line 12 and the weakening line 13 in the inner cover flap 5 was illustrated, when the corrugated cardboard of a material is a thing which is easy to bend, the weakening line 13 may be abbreviate | omitted or a valley folding line Both 12 and the weakening line 13 may be omitted.

  In addition, although each pair of side plates 1 and end plates 2 exemplifies a rectangular cylindrical peripheral wall, a packaging box in which a chamfered portion is formed between the side plate 1 and the end plate 2 at a corner portion of the peripheral wall. A similar simple lock structure can be applied.

DESCRIPTION OF SYMBOLS 1 Side plate 2 End plate 3 Passage piece 4 Outer lid flap 5 Inner lid flaps 6, 7 Bottom flaps 8a and 8b End convex part 9 Side end convex part 10 Engagement cut 11 Press piece 12 Valley fold line 13 Weak line

Claims (1)

A pair of side plates (1) and end plates (2) are connected in the circumferential direction, with an outer lid flap (4) at the upper end of the side plate (1) and an inner lid flap (5) at the upper end of the end plate (2). In each packaging box,
The pair of outer lid flaps (4) is provided with tip convex portions (8a, 8b) at the middle and both sides of the tip edge, respectively, and the side end convex portions (9 ), And the inner lid flap (5) is formed with an engagement notch (10) whose both ends are bent in a direction away from the end plate (2), and the pressing piece (11) facing the intermediate portion is the end. Formed in the direction of protruding from the plate (2),
The tip convex portions (8a, 8b) overlap each other at the middle and both sides of the tip edge of the outer lid flap (4), and the side edge convex portion (9) of the outer lid flap (4) is at the engagement cut (10). Enclosed and held in the sealed state by being held down by the pressing piece (11),
When the pressing piece (11) is pushed down, the engagement between the side end projection (9) and the pressing piece (11) is released and the simple locking packaging box is opened.

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