JP5408544B2 - Cardboard tray - Google Patents

Description

  The present invention relates to a tray that is assembled using cardboard or the like as a material and is used for transporting or storing articles.

  For example, Patent Document 1 below describes a tray in which a thick paper blank shown in FIG. 5 is assembled into a shape as shown in FIG.

  In this tray, a side wall 52 and an end wall 53 are connected around the bottom wall 51 with a corner portion interposed therebetween, and the end wall 53 is formed by inner and outer double end plates 54 and 55 and an end top plate 56. A holding wall 57 is connected to the side end of each of the holding plates 57, and the holding wall 57 is formed by inner and outer double holding plates 58 and 59 and a holding plate 60 extending from the end plates 54 and 55 and the end top plate 56, respectively. The end portion of the side wall 52 is sandwiched between the holding plates 58 and 59 of the holding wall 57.

U.S. Pat. No. 3,944,129

  However, in the cardboard tray as described above, the standing state of the side wall 52 and the end wall 53 with respect to the bottom wall 51 is not maintained unless the end of the side wall 52 and the holding wall 57 are fixed by an adhesive or staples. There is a problem.

  Therefore, an object of the present invention is to maintain the standing state of the side wall and the end wall with a simple operation.

In order to solve the above-mentioned problems, the present invention is such that a side wall and an end wall are connected around a corner portion around a bottom wall, the end wall is formed by a double end plate and an end top plate, and a side edge of the end wall is formed. The holding wall is connected to the end plate, and the holding wall is formed by a double holding plate and a top plate extending from the end plate and the end top plate, respectively. In a cardboard tray that is bent so as to form an edge, and the end wall is erected, and the end portion of the side wall is sandwiched between the holding plates of the holding wall, the cut across the double holding plate and the crest plate on the holding wall To form a locking claw, put a crease line located in the middle of the width direction of the crest plate into the locking claw, bend the locking claw into a mountain shape, cut out the upper end of the side wall, and raise the end side By forming the locking step, the end wall side edge of the locking claw and the edge of the locking step are brought into contact with the standing of the end wall. Engaging, it was as upright side walls and end walls are maintained.

  In the cardboard tray according to the present invention, when the end wall is erected from the bottom wall, the side wall and the end wall are locked only by sandwiching the end of the side wall between the holding plates of the holding wall bent from the end wall. Therefore, it can be assembled by a simple operation, and the side wall and the end wall are stabilized in an upright state by this lock, and an excellent strength can be obtained.

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. The fragmentary perspective view which shows the locking process of a side wall and an end wall same as the above Figure showing a conventional cardboard tray blank The perspective view which shows an assembly state same as the above.

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

  The tray is formed from a cardboard blank as shown in FIG. In this blank, among the respective sides around the rectangular bottom wall 1, the side wall 2 is connected to the long side sandwiching the corner portion, and the end wall 3 is connected to the short side. The end wall 3 is formed by end plates 4 and 5 that are sequentially arranged from the bottom wall 1 side, and an end top plate 6 that connects them.

  A holding wall 7 is connected to the side end of the end wall 3, and the holding wall 7 extends from each of the end plates 4, 5 and the end top plate 6 and is connected to each other. It is formed by. The front corner of the holding plate 9 is cut obliquely.

  A retaining claw 11 is formed in the retaining wall 7 by inserting a notch 11 a extending over the retaining plates 8, 9 and the crest plate 10, and the retaining claw 11 has a retaining plate in the middle in the width direction of the crest plate 10. A crease line 11b is placed at a position slightly closer to the 9 side, and a crease line 11c is placed at one end of the holding plate 9 side. The cut 11a is inclined so that the width of the locking claw 11 becomes narrower toward the crease line 11b.

  The side wall 2 is notched at the middle part of the edge that becomes the upper end during assembly, and is formed with locking step portions 2a on both sides, and the locking step portion 2a is inclined so that the upper end side during assembly protrudes. Yes. Arc-shaped notch edges 2 b are formed at both end edges of the side wall 2.

  A crease line 12a is inserted in the middle of the boundary between the end plate 5 and the holding plate 9, and a crease line 12b is placed on both sides of the boundary. A hole 12c is provided. The escape hole 12 c is V-shaped at the boundary between the end top plate 6 and the crest plate 10.

  The crease line 13a at the boundary between the end plates 4 and 5 and the end top plate 6 of the end wall 3 is inclined so that the end top plate 6 becomes wider on the middle side in the length direction, and the boundary between the bottom wall 1 and the end plate 4 The crease line 13b is inclined so as to be symmetric with the crease line 13a facing each other.

  Further, the end plates 4 and 5 are provided with handle holes 14 into which hands are inserted when the tray is transported. Furthermore, in order to prevent a stacking error at the time of stacking, an engagement protrusion 15 is formed by a U-shaped notch at the center of the boundary between the end plate 5 and the end top plate 6, and the end plate 4 of the bottom wall 1. An engagement hole 16 into which the engagement protrusion 15 is inserted is provided along the boundary with the center of the tip edge of the end plate 5.

  To assemble such a blank, as shown in FIG. 2 and FIGS. 4 (a) and 4 (b), the side wall 2 is erected from the bottom wall 1, and the end wall 3 is moved along the crease line 13a. 4 is the outside and the end plate 5 is bent so as to be wound inward, and the holding wall 7 is bent so that the holding plate 8 is outward and the holding plate 9 is wound inward.

  When the end wall 3 is bent in this way, the end wall 3 and the holding wall 7 have a double structure, and the fold line at the boundary between the crest plate 10 and the couch plates 8 and 9 and the crease line 11b of the locking claw 11 are formed. Due to the shift, the locking claw 11 is bent into a mountain shape along the crease lines 11b and 11c.

  Next, the end wall 3 and the holding wall 7 are bent so as to form a corner portion by valley-folding along the crease line 12a and mountain-folding along the crease line 12b on both sides thereof, As the end wall 3 rises from the bottom wall 1, the end of the side wall 2 is sandwiched between the holding plates 8 and 9 of the holding wall 7.

  At this time, due to the presence of the escape hole 12c, repulsion is reduced, and the end wall 3 and the holding wall 7 can be easily bent. Further, since the front end corner portion of the holding plate 9 is cut obliquely, the end portion of the side wall 2 is guided between the holding plates 8 and 9, and an arcuate cutout edge 2 b is formed at the end edge of the side wall 2. Therefore, the end wall 3 can be raised without the holding plate 9 being caught by the edge of the side wall 2.

  Then, as shown in FIGS. 3 and 4C, when the end wall 3 is erected, the locking step 2a is engaged with the edge of the locking claw 11 on the cut 11a side, and the side wall 2 and the end The wall 3 is locked, and the standing state of the side wall 2 and the end wall 3 is maintained.

  At this time, due to the inclination of the cut 11a and the locking step 2a, the locking step 2a bites into the gap formed between the inner surface of the locking claw 11 and the holding plate 9, and the locking claw 11 And the engaging step 2a are securely engaged.

  Thus, in the corrugated tray as described above, when the end wall 3 is erected from the bottom wall 1, the end portion of the side wall 2 is interposed between the holding plates 8 and 9 of the holding wall 7 bent from the end wall 3. Since the side wall 2 and the end wall 3 are locked only by sandwiching them, the side wall 2 and the end wall 3 can be stabilized in a standing state by the lock.

  Further, the end wall 3 and the holding wall 7 sandwiching the corner portion have a double structure, and the end wall 3 becomes thicker in the middle due to the inclination of the crease lines 13a and 13b, so that a high compressive strength can be obtained. And deformation during stacking is prevented.

  Moreover, the use area of material can be reduced compared with the general corrugated board tray which made the side wall the double structure over the full length.

  In the above embodiment, the structure in which the side wall 2 and the end wall 3 are locked by the engagement of the locking claw 11 and the locking step 2a is applied to all the corners of the tray. You may apply this lock structure only to a part of corner part.

  Moreover, this lock structure may be applied only to the corner portion of one end wall among the opposing end walls, and the lid may be connected to the upper end of the other end wall so as to be freely opened and closed via a ruled line serving as a hinge. .

  Moreover, although the planar shape is exemplified for a tray having a quadrangular shape, the same lock structure can be applied to a tray having a chamfered portion at a corner portion.

DESCRIPTION OF SYMBOLS 1 Bottom wall 2 Side wall 2a Locking step part 2b Notch edge 3 End wall 4, 5 End plate 6 End top plate 7 Holding wall 8, 9 Holding plate 10 Top plate 11 Locking claw 11a Incision 11b, 11c Fold line 12a, 12b Crease line 12c Relief holes 13a, 13b Crease line 14 Handle hole 15 Engagement protrusion 16 Engagement hole

Claims (1)

Side wall (2) and end wall (3) are connected around corner wall around bottom wall (1), end wall (3) is double end plate (4, 5) and end top plate (6) The holding wall (7) is connected to the side end of the end wall (3), and the holding wall (7) extends from the end plate (4, 5) and the end top plate (6), respectively. The end plate (8, 9) and the crest plate (10) are formed, bent so that the end wall (3) and the holding wall (7) are wound together, and bent so as to form a corner portion. is raised walls (3), in cardboard trays sandwiching the end portion of the side wall (2) between the抱板(8,9) of the holding walls (7), the holding wall (7), double A claw (11a) is formed by inserting the cut plate ( 8, 9 ) and the crest plate (10) across the couch plate (10), and the claw plate (10) is formed in the middle of the claw plate (10) in the width direction. Insert the crease line (11b) located at the end, fold the locking claw (11) into a chevron, cut the upper end of the side wall (2), and form the locking step (2a) with the end side raised, As the wall (3) rises, the end wall of the locking claw (11) ( 3) The side edge and the edge of the locking step (2a) are brought into contact with each other to be engaged so that the standing state of the side wall (2) and the end wall (3) is maintained. A featured cardboard tray.

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