JP5435276B2 - Cardboard tray - Google Patents

Description

  The present invention relates to a corrugated tray suitable for transporting and displaying fruits and vegetables.

  Conventionally, in Patent Document 1 below, as shown in FIG. 6, a side wall 52 and an end wall 53 adjacent to the side wall 52 are provided around the bottom wall 51, and the side wall 52 is connected to the bottom wall 51. There is described a corrugated tray made up of an outer plate 54, a top plate 55, and an inner plate 56 that are sequentially connected, and an outer end plate 57, a top plate 58, and an inner end plate 59 that are connected in sequence to the bottom wall 51.

  The shape of this tray is such that the folding pieces 60 and 61 extending from the outer end plate 57 and the inner end plate 59 are sandwiched between the outer plate 54 and the inner plate 56, and the side wall 52 and the end wall 53 are kept upright. It is held by doing.

  Further, as a characteristic part of this tray, the side wall 52 is formed with an inclined chamfered portion 63 by bending the upper and lower portions of the outer plate 54 along a crease line 62 extending in the horizontal direction. The folding plate 64 interposed between the bottom wall 51 and the edge of the bottom wall 51 is turned back inward from the edges of the bottom wall 51 and the side wall 52.

  In addition, the upper end of the side wall 52 is provided with a stacking protrusion 65 formed by the protruding portion of the folding piece 61 penetrating the hole in the top plate 55, and the ridge portion between the lower end of the side wall 52 and the bottom wall 51 is provided during stacking. A stacking hole 66 for engaging the stacking protrusion 65 of the lower tray is provided.

  Such a tray can be easily placed by placing a finger on the chamfered portion 63 or putting a finger in the recess of the end surface in a stacked state containing fruits and vegetables due to the presence of the chamfered portion 63 and the retreat of the end wall 53. In addition to being able to lift it, it has a distinctive appearance, so it can attract the attention of customers when it comes to food supermarkets and market displays.

Japanese Patent No. 3431939

  However, in the cardboard tray as described above, when an unexpectedly large loading load is applied, the outer side plate 54 of the side wall 52 is buckled, resulting in significant deformation, loss of aesthetics, and damage to the contents. is there.

  Accordingly, an object of the present invention is to be able to attract customers' attention while improving the strength.

  In order to solve the above-described problems, the present invention provides an outer plate, a top plate, and a side wall, and an end plate adjacent to the corner wall, which are adjacent to each other around the bottom wall. In a corrugated cardboard tray that is formed of an inner plate and holds a folded piece extending from an end wall between the outer plate and the inner plate, the outer plate is a crease line extending horizontally in the middle of the height direction. The stacking protrusion is formed at the upper end of the corner portion formed by the side wall and the end wall, and the stacking hole is provided at the lower end so as to be engaged during stacking. The upper protrusion is formed from the folding piece and the protruding portion of the outer plate, and the upper end of the protruding portion of the outer plate hits the protruding portion of the folding piece with the inclination of the entire portion above the fold line of the outer plate. .

  In addition, an engagement protrusion is provided at the lower edge of the folded piece, and the engagement protrusion is engaged with an engagement hole provided at the boundary with the side wall of the bottom wall together with the engagement protrusion provided at the leading edge of the inner plate. It was combined.

  In this corrugated tray, it is possible to attract the customer's attention when the outer plate is bent due to the bending of the outer plate, and the outer plate that forms the stacking protrusion at the corner formed by the side wall and the end wall. Since the protruding portion is stretched and the outer plate forms a triangular shape in side view together with the inner plate and the folded piece, even if a large load is applied, the outer plate is unlikely to buckle, the aesthetics are maintained, and the contents are maintained. Protected.

  Further, when the engagement protrusion of the folding piece is engaged with the engagement hole provided at the boundary with the side wall of the bottom wall together with the engagement protrusion of the inner plate, the repulsion of the folding piece and the inner plate is suppressed, Shape retention is improved.

The figure which shows the blank of the cardboard tray which concerns on embodiment of this invention Perspective view showing the assembly process The perspective view which shows an assembly state same as the above. Sectional view along line IV-IV in FIG. The perspective view which shows the stacked state same as the above The perspective view which shows the assembly state of the conventional cardboard tray

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

  This cardboard tray is formed from a blank as shown in FIG. In this blank, side walls 2 are connected to a pair of long sides of a rectangular bottom wall 1, and end walls 3 are connected to a pair of short sides. The side wall 2 includes an outer plate 4, a top plate 5, and an inner plate 6 that are sequentially connected to the bottom wall 1, and folding pieces 7 are continuously provided on both sides of the end wall 3.

  The dimension in the height direction of the outer plate 4 is set to be larger than the dimension in the height direction of the inner plate 6, and the outer plate 4 has a crease line 8 extending in the horizontal direction at an intermediate portion in the height direction. . The crease line 8 is a lead rule in which creases and cuts are alternately interrupted.

  The width of the top plate 5 that is the distance between the outer plate 4 and the inner plate 6 is set to be slightly larger than the thickness of one cardboard, that is, smaller than the width of the top plate of a tray having a general frame structure. .

  Two engagement projections 6 a are provided on the leading edge of the inner plate 6, and the engagement projection 7 a is provided on the lower end edge when the folding piece 7 is assembled. An engagement hole 1 a is provided in the bottom wall 1 at a position corresponding to the engagement protrusion 6 a along the boundary with the outer plate 4.

  The amount of protrusion of the engaging protrusions 6a and 7a is set to be slightly larger than the thickness of one corrugated cardboard, that is, longer than the engaging protrusion of a tray with a general frame structure, and the outer and inner edges of the engaging hole 1a The interval is set slightly larger than the thickness of two cardboards.

  Protruding portions 9 a and 9 b are connected to a boundary portion between the end wall 3 and the folding piece 7 and a protruding portion 9 c is provided on the outer plate 4 at the upper end of the corner portion formed by the side wall 2 and the end wall 3. It has been. An L-shaped stacking hole 10 is provided at the lower end of the corner portion.

  A through hole 2 a for ventilation and finger insertion is formed from the top plate 5 to the outer plate 4 and the inner plate 6, and the through hole 2 a is also provided in the folding piece 7 correspondingly.

  To assemble such a blank, as shown in FIG. 2, the end wall 3 is erected from the bottom wall 1, the folding piece 7 is bent inward from the end wall 3, and the engaging protrusion 7a is engaged with the engaging hole 1a. In the combined state, the outer side plate 4 is folded along the crease line 8 while the outer side plate 4, the top plate 5 and the inner side plate 6 are folded.

  Then, as shown in FIGS. 3 and 4, when the folding piece 7 is sandwiched between the outer plate 4 and the inner plate 6 and the engagement protrusion 6a is overlapped with the engagement protrusion 7a and engaged with the engagement hole 1a, The upright state of the side wall 2 and the end wall 3 is maintained, and this tray is shaped.

  At this time, at the upper end of the corner portion formed by the side wall 2 and the end wall 3, a stacking protrusion 9 is formed by the end wall 3, the folding piece 7, and the protruding portions 9 a, 9 b, 9 c of the outer plate 4. In the protrusion 9, the protrusions 9 a and 9 b are bent at a right angle, and the upper end of the protrusion 9 c abuts against the protrusion 9 b of the folding piece 7 with the inclination of the entire portion above the fold line 8 of the outer plate 4.

  In the corrugated tray as described above, fruits and vegetables are stored, and as shown in FIG. 5, when the stacking projections 9 of the lower tray are engaged with the stacking holes 10 of the upper tray, as shown in FIG. If it is displayed in a food supermarket or a market in this state without collapsing, the outer plate 4 can be bent to give a shaded appearance and attract customers' attention.

  Further, at the corner portion formed by the side wall 2 and the end wall 3, the protruding portion 9 c of the outer plate 4 that forms the stacking protrusion 9 is stretched, and the outer plate 4 forms a triangular shape in side view together with the inner plate 6 and the folding piece 7. Therefore, even if a large load is applied, the outer plate 4 is unlikely to buckle, the aesthetic appearance is maintained, and the contents are protected.

  Moreover, since the engaging protrusion 7a of the folding piece 7 is engaged with the engaging hole 1a provided in the boundary part with the side wall 2 of the bottom wall 1 together with the engaging protrusion 6a of the inner side plate 6, the folding piece 7 Further, the repulsion of the inner plate 6 is suppressed, and further, the width of the top plate 5 is set to be narrow, so that the folded piece 7 is held between the outer plate 4 and the inner plate 6 to obtain excellent shape retention. be able to.

  Further, since the engagement protrusion 6a is set to be long, even if the side wall 2 swings and the lower end of the inner plate 6 is lifted from the bottom wall 1, the engagement protrusion 6a does not come out of the engagement hole 1a, and the side wall 2 The phenomenon that the assembly shape collapses due to falling is prevented.

  In the outer plate 4, it is not preferable in terms of strength to make the dimensions in the height direction above and below the crease line 8 undesirably strong, and the bent outer plate 4 and inner plate 6 are isosceles triangles in a side view. The shape should be formed.

  In addition, it is not preferable in terms of transportation efficiency that the outer plate 4 protrudes to the outside at the position of the crease line 8. For example, when a B flute corrugated cardboard having a thickness of about 3.5 mm is used, It is good to make it protrude about 4-8 mm.

  By the way, in the said embodiment, although the stacking protrusion 9 was formed with the protrusion part 9a, 9b, 9c of the end wall 3, the folding piece 7, and the outer side board 4, the protrusion part 9a of the end wall 3 may be abbreviate | omitted.

  In this case, the end wall 3 has a double structure similar to that of the side wall 2, the folding piece 7 extending from the side wall 2 is sandwiched between the end walls 3, and a stacking protrusion 9 similar to the side wall 2 is provided on the end wall 3. May be.

DESCRIPTION OF SYMBOLS 1 Bottom wall 1a Engagement hole 2 Side wall 2a Through hole 3 End wall 4 Outer plate 5 Top plate 6 Inner plate 6a Engagement protrusion 7 Folding piece 7a Engagement protrusion 8 Crease line 9 Stacking protrusion 9a, 9b, 9c Protrusion part 10 Top hole

Claims (1)

Around the bottom wall (1), a side wall (2) and an end wall (3) adjacent to the side wall (2) are connected to each other, and an outer plate (4) sequentially connecting the side wall (2) to the bottom wall (1). ), A top plate (5) and an inner plate (6), and a corrugated cardboard which holds a folded piece (7) extending from the end wall (3) between the outer plate (4) and the inner plate (6). In the tray, the outer plate (4) is bent outward along the fold line (8) extending in the horizontal direction at the intermediate portion in the height direction to be bent outward, and the side wall (2) and the end wall ( 3) A stacking protrusion (9) is provided at the upper end of the corner portion and the lower end is provided with a stacking hole (10) to be engaged during stacking, and this stacking protrusion (9) is inserted into the folding piece (7 ) And the protrusion (9b, 9c) of the outer plate (4), and the protrusion (9c) of the outer plate (4) with the inclination of the entire portion above the fold line (8) of the outer plate (4). the upper end of) is to abut the protruding portion of the folding piece (7) (9b), the engaging projection of (7a) provided on the lower edge of the folding piece (7), this The mating protrusion (7a) is connected to the engaging hole (1a) provided at the boundary with the side wall (2) of the bottom wall (1) together with the engaging protrusion (6a) provided at the leading edge of the inner plate (6). A cardboard tray characterized by being engaged .

Images