JP2019199287A - Tray and blank of tray - Google Patents

Abstract

To provide a tray which can promote improvement of stability when trays are piled up, and a blank of the tray.SOLUTION: A tray 10 of this invention comprises a bottom wall 12, first side walls 16 having a simple structure which stand from the bottom wall 12, second side walls 19 having a double structure which stand from the bottom wall 12, and holding portions 32 which hold the first side walls 16 and the second side walls 19 for the bottom wall 12 in a standing state. The holding portion 32 comprises an outside holding plate 33 which is arranged on the outside of the first side wall 16, a bridge plate 35 which extends inward along an extending direction of the bottom wall 12 from an upper end of the outside holding plate 33, an inside holding plate 37 which extends toward the bottom wall 12 from a tip edge portion 35a of the opposite side of the outside holding plate 33 of the bridge plate 35, and is arranged inside for the first side wall 16. The tip edge portion 35a of the bridge plate 35 extends in a cross direction for the first side wall 16 so that the tip edge portion closes to the first side wall 16 while going away from the second side wall 19.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tray and a tray blank.

  Patent Document 1 discloses a tray in which side walls are erected on four sides of a bottom wall. Of the four side walls, a pair of first side walls facing each other has a single-layer structure, and a pair of second side walls facing each other has a two-layer structure. The second side wall includes an outer plate, an edge plate, and an inner plate, and the outer plate and the inner plate are arranged at a predetermined interval by the edge plate. The second side wall is provided with a holding portion for holding the first side wall and the second side wall in an upright state with respect to the bottom wall.

JP 61-127434 A

  In the tray of Patent Document 1, the first side wall has a single-layer structure, and the thickness of the first side wall is thin, so the stability when stacking the trays is low. Specifically, if the positions of the lower tray and the upper tray are shifted, the upper tray may fall into the lower tray.

  It is an object of the present invention to provide a tray and a tray blank that can improve stability when stacking trays.

  According to a first aspect of the present invention, there is provided a bottom wall having a first side and a second side extending so as to intersect the first side, and a first side wall having a single-layer structure erected on the first side. And a second side wall having a two-layer structure erected on the second side, and a holding portion that holds the first side wall and the second side wall in an erected state with respect to the bottom wall, The two side walls are an outer plate connected to the bottom wall, an edge plate extending inward from the tip of the outer plate along the direction in which the bottom wall extends, and from the tip of the edge plate toward the bottom wall. And an outer holding plate arranged on the outer side of the first side wall, the holding part being connected to the outer plate of the second side wall. A crosspiece extending inwardly along the direction in which the bottom wall extends from the upper end of the outer holding plate so as to cover the upper end of the first side wall, and the outer holding plate of the crosspiece An inner holding plate extending from the opposite end edge toward the bottom wall and disposed inside the first side wall, and the end edge of the crosspiece extends from the second side wall. A tray is provided that extends in a direction intersecting the first side wall so as to approach the first side wall as it moves away.

  According to this configuration, when stacking the trays up and down, the bottom wall of the upper tray is supported by the crosspieces of the lower tray, so that even if the first side wall has a single-layer structure, the upper tray And the lower tray can be displaced. For this reason, when stacking trays up and down, even if the upper and lower trays are slightly out of position, the upper tray will not fall into the lower tray, improving tray stability. it can.

  The inner holding plate may have a side end portion extending from an end on the first side wall side of the front edge of the crosspiece toward the bottom wall, and the side end portion of the inner holding plate. May be in contact with the first side wall.

  According to this configuration, since the first side wall and the side end portion of the inner holding plate are arranged without a gap, the side end portion of the inner holding plate is arranged apart from the first side wall. Compared with the case, it can suppress that the articles | goods accommodated in the inside of a tray are damaged by the side edge part.

  The inner holding plate extends along a plane orthogonal to the bottom wall such that a normal line of the inner holding plate extending away from the first side wall extends along a direction in which the bottom wall extends. It may be.

  According to this configuration, since the inner holding plate extends along a plane perpendicular to the bottom wall, when the trays are stacked up and down, a compressive strength against a vertical load applied to the tray can be secured.

  The inner holding plate is inclined with respect to the bottom wall such that a normal line of the inner holding plate extending away from the first side wall extends from the tip edge toward the bottom wall. May be.

  According to this configuration, the inner holding plate is inclined with respect to the bottom wall so that the normal line of the inner holding plate extends toward the bottom wall toward the side opposite to the first side wall. The space for storing the articles becomes wider as the bottom wall is approached. For this reason, even if it is a case where an upper holding plate is provided in a holding part, reduction of the space for accommodating articles can be controlled.

  A support plate disposed between the outer holding plate and the inner holding plate of the holding portion may be connected to the first side wall, and the support plate may be provided from a tip of the first side wall. It may extend toward the inner holding plate.

  According to this configuration, since the support plate is disposed between the outer holding plate and the inner holding plate of the holding unit and the support plate extends toward the inner holding plate, the inner holding plate is held outside through the support plate. Supported by a plate. For this reason, since the movement of the inner holding plate in the direction approaching the outer holding plate is restricted by the support plate, the distance between the outer holding plate and the inner holding plate can be held, and the articles can be stably accommodated inside the tray.

  A projecting plate disposed between the outer plate and the inner plate of the second side wall may be connected to the first side wall, and the projecting plate may be connected to the inner plate from the tip of the first side wall. It may extend toward.

  According to this configuration, the protruding plate is disposed between the outer plate and the inner plate of the second side wall, and the protruding plate extends toward the inner plate, so that the inner plate is supported by the outer plate via the protruding plate. ing. For this reason, the movement in the direction approaching the outer plate of the inner plate is restricted by the protruding plate, the interval between the outer plate and the inner plate can be maintained, and the article can be stably stored in the tray.

  According to a second aspect of the present invention, there is provided a bottom wall having a first side and a second side extending in a direction intersecting the first side, a first side wall provided continuously to the first side, and the first side A second side wall continuously provided on two sides; and a holding portion for holding the first side wall and the second side wall in an upright state with respect to the bottom wall, wherein the second side wall An outer plate continuously provided on two sides; an edge plate continuously provided on a front end of the outer plate; and an inner plate provided continuously on a front end of the edge plate; An outer holding plate that is connected to the outer plate of the side wall and extends in the same direction as the first side wall; and a tip edge that is connected to the outer holding plate and extends inclined with respect to the direction in which the outer holding plate extends. And a tray blank having an inner holding plate connected to the front end edge of the crosspiece.

  ADVANTAGE OF THE INVENTION According to this invention, stability at the time of stacking | stacking and arrange | positioning a tray can be improved.

The perspective view of the tray which concerns on 1st Embodiment of this invention. The top view of the tray which concerns on 1st Embodiment. III-III sectional view taken on the line of FIG. IV-IV sectional view taken on the line of FIG. The perspective view which shows the state which accumulated the tray of FIG. 1 up and down. The top view of the blank of the tray of FIG. Sectional drawing of a corrugated cardboard sheet. Sectional drawing which shows the general ruled line formed in the corrugated cardboard sheet. Sectional drawing which shows the reverse ruled line formed in the cardboard sheet | seat. Sectional drawing which shows the cutting line formed in the corrugated cardboard sheet. The perspective view which shows 1 process at the time of assembling the tray of FIG. The perspective view which shows another 1 process at the time of assembling the tray of FIG. The perspective view which shows another 1 process at the time of assembling the tray of FIG. The perspective view which shows another 1 process at the time of assembling the tray of FIG. The perspective view of the tray which concerns on the modification of 1st Embodiment. The perspective view of the tray which concerns on 2nd Embodiment. Sectional drawing similar to FIG. 3 of the tray which concerns on 2nd Embodiment. Sectional drawing similar to FIG. 4 of the tray which concerns on 2nd Embodiment. The top view of the blank of the tray of 2nd Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
1 to 5 show a tray 10 according to a first embodiment of the present invention. In the tray 10, a pair of first side walls 16 facing each other is configured with a single-layer structure, and a pair of second side walls 19 facing each other is configured with a two-layer structure (double wall). The tray 10 also includes a holding portion 32 for holding the first side wall 16 and the second side wall 19 in an upright state. As shown in FIG. 5, in the present invention, when the trays 10 are stacked up and down, the upper holding plate (crosspiece plate) 35 is held by the holding unit so that the upper tray 10 is less likely to fall into the lower tray 10. 32.

  The tray 10 of this embodiment is assembled from a blank 10 'shown in FIG. The blank 10 ′ is formed by punching a paper cardboard sheet 1 (shown in FIGS. 7 to 10) with a known paper machine punching device. In the following description, the vertical direction and the horizontal direction in FIG. 6 may be referred to as the vertical direction and the horizontal direction of the blank 10 ′, respectively.

  Referring to FIG. 7, the corrugated cardboard sheet 1 has a configuration in which a corrugated center 4 is disposed between the front liner 2 and the back liner 3. Referring to FIG. 8, the alternate long and short dash line in FIG. 6 is a general ruled line formed by putting a rule from the back liner 3 so as to compress the thickness. Referring to FIG. 9, the chain double-dashed line in FIG. 6 is a reverse ruled line formed by putting a rule from the front liner 2 side so as to compress the thickness. Referring to FIG. 10, the solid line in FIG. 6 is a cutting line formed by inserting a blade from the front liner 2 to the back liner 3 or a shape line (edge) by punching.

  As shown in FIGS. 1 and 2, the tray 10 includes a rectangular bottom wall 12. On the pair of first sides 12a facing each other of the bottom wall 12, rectangular first side walls 16 are provided upright via folding lines 17 made of general-purpose ruled lines. In addition, rectangular second side walls 19 are erected on a pair of second sides 12b of the bottom wall 12 facing each other. An opening 11 is defined by the upper ends of the two first side walls 16 and the upper ends of the two second side walls 19. The total length of the first side wall 16 in the direction along the bottom wall 12 is longer than the total length of the second side wall 19.

  Referring to FIG. 6, one of the two first side walls 16 protrudes from the bottom wall 12 to one side in the vertical direction of the blank 10 ′ (upward in FIG. 6), and the other from the bottom wall 12 to the blank 10 ′. It protrudes to the other side in the vertical direction (downward (reverse) in FIG. 6). One of the two second side walls 19 protrudes from the bottom wall 12 to one side of the blank 10 'in the lateral direction (leftward in FIG. 6), and the other projects from the bottom wall 12 to the other side of the blank 10'. It protrudes to the side (rightward (reverse) in FIG. 6).

  1 to 3, the second side wall 19 includes a rectangular outer plate 20, an edge plate 22, and an inner plate 24.

  As shown most clearly in FIG. 3, the outer plate 20 is connected to the second side 12 b of the bottom wall 12 via a folding line 21 made of a general ruled line. The outer plate 20 is formed by bending the blank 10 ′ (shown in FIG. 6) along the folding line 21 so that the outer plate 20 is orthogonal to the bottom wall 12, and the first side wall 16 and the bottom wall 12. Projecting in the same direction. The folding line 21 extends in a direction perpendicular to the folding line 17 between the bottom wall 12 and the first side wall 16.

  The edge plate 22 is connected to the upper end (tip) of the outer plate 20 via a folding line 23 made of general-purpose ruled lines. The edge plate 22 is configured such that the blank 10 ′ (shown in FIG. 6) is bent along the folding line 23 so that the edge plate 22 is orthogonal to the outer plate 20, so that the tray 10 extends along the direction in which the bottom wall 12 extends. Protrudes inward. The folding line 23 extends parallel to the folding line 21 of the bottom wall 12 and the outer plate 20.

  The inner plate 24 is connected to the inner end (tip) of the edge plate 22 via a folding line 25 made up of general-purpose ruled lines. The inner plate 24 extends in parallel with the outer plate 20 by bending the blank 10 ′ (shown in FIG. 6) along the folding line 25 so that the inner plate 24 is orthogonal to the edge plate 22. It is arranged inside the plate 20. The folding line 25 extends parallel to the folding line 23 between the outer plate 20 and the edge plate 22.

  Referring to FIGS. 3 and 6 together, two locking pieces 26 and 26 project from the tip of the inner plate 24 located on the bottom wall 12 side. The bottom wall 12 is formed with punching holes 13 for locking the locking pieces 26 along the folding line 21 between the bottom wall 12 and the outer plate 20. The width of the locking hole 13 in the lateral direction (left-right direction in FIG. 6) of the blank 10 ′ is substantially the same as the width between the folding lines 23 and 25 on both sides of the edge plate 22. The locking hole 13 has a function of a positioning hole when the trays 10 are stacked and arranged.

  Referring to FIGS. 1 to 3, the second side wall 19 is provided with two positioning protrusions 27 and 27 that are inserted into the locking holes 13. The positioning protrusion 27 has a triangular outer shape in a cross section orthogonal to the direction in which the folding line 25 extends, and protrudes upward from the upper end (edge plate 22) of the second side wall 19.

  Referring to FIG. 6, the blank 10 ′ of the present embodiment is provided with two parallel cutting lines 28, 28 provided from the outer plate 20 to the inner plate 24, thereby forming the positioning protrusion 27. Is done. The folding lines 23 and 25 on both sides of the edge plate 22 are not formed between the cutting lines 28 and 28. Folded curves 29 and 29 made of general ruled lines are provided between the ends of the cutting lines 28 and 28 located on the outer plate 20 and between the ends of the cutting lines 28 and 28 located on the inner plate 24, respectively. ing. Further, a folding line formed of general-purpose ruled lines is located between the folding lines 23 and 25 on both sides of the edge plate 22 at an intermediate portion between the cutting lines 28 and 28 and extends from one of the cutting lines 28 and 28 to the other. 30 is provided.

  Referring to FIGS. 1 to 4, holding portions 32 for holding the first side wall 16 and the second side wall 19 in an upright state are provided at both ends of the second side wall 19. The holding portion 32 is connected to the second side wall 19, and has an outer holding plate 33 disposed outside the first side wall 16 and an upper holding plate (cross plate) 35 disposed above the first side wall 16. And an inner holding plate 37 disposed inside the first side wall 16. Further, as shown in FIG. 3, the holding portion 32 includes a first folding plate 40 disposed between the outer plate 20 and the inner plate 24 of the second side wall 19.

  Referring to FIG. 1, the outer holding plate 33 has a trapezoidal shape and is connected to the outer plate 20 of the second side wall 19 via a folding line 34 formed of a general ruled line. The folding line 34 extends in a direction perpendicular to the first side 12a (folding line 17) and the second side 12b (folding line 21) of the bottom wall 12. The outer holding plate 33 is formed so that the blank 10 ′ (shown in FIG. 6) is bent along the folding line 34 so that the outer holding plate 33 is orthogonal to the outer plate 20, so that the outer holding plate 33 extends along the first side wall 16. It is arranged outside one side wall 16.

  Referring to the blank of FIG. 6, the pair of outer holding plates 33 connected to the single outer plate 20 protrude in the same direction as the first wall 16 protrudes from the bottom wall 12. That is, one of the pair of outer holding plates 33 protrudes from the outer plate 20 to one side in the vertical direction (upward in FIG. 6), and the other protrudes from the outer plate 20 to the other side in the vertical direction (downward in FIG. 6). ing.

  Referring to FIGS. 1, 2, and 4 together, the upper holding plate 35 has a substantially triangular shape in plan view, and is connected to the upper end of the outer holding plate 33 via a folding line 36 formed of a general ruled line. Yes. The folding line 36 extends parallel to the folding line 17 between the bottom wall 12 and the first side wall 16. The upper holding plate 35 extends along the direction in which the bottom wall 12 extends by bending the blank 10 ′ (shown in FIG. 6) along the folding line 36 so that the upper holding plate 35 is orthogonal to the outer holding plate 33. Projecting inwardly and covering the upper end of the first side wall 16. Further, the tip edge portion 35a of the upper holding plate 35 opposite to the outer holding plate 33 extends in a direction intersecting the first side wall 16 so as to approach the first side wall 16 as the distance from the second side wall 19 increases. ing.

  Referring to the blank 10 ′ in FIG. 6, the upper holding plate 35 extends in a direction intersecting the folding line 36. The leading edge 35a of the upper holding plate 35 extends so as to be inclined with respect to the vertical direction (vertical direction in FIG. 6) of the blank 10 '. Specifically, the front end edge 35a (a fold line 38 to be described later) of the upper holding plate 35 extends outward in the vertical direction and inward in the horizontal direction of the blank 10 '.

  Referring to FIGS. 1 and 4 together, the inner holding plate 37 has a rectangular shape, and is connected to the tip edge portion 35a of the upper holding plate 35 via a folding line 38 formed of a general ruled line. That is, the inner holding plate 37 is connected to the outer holding plate 33 through the upper holding plate 35. As described above, the folding line 38 (the leading edge 35 a of the upper holding plate 35) extends in a direction intersecting the first side wall 16 so as to approach the first side wall 16 as the distance from the second side wall 19 increases. ing. The inner holding plate 37 extends toward the bottom wall 12 by bending the blank 10 ′ (shown in FIG. 6) along the folding line 38 so that the inner holding plate 37 is orthogonal to the upper holding plate 35. The first side wall 16 is disposed inside. In other words, as shown in FIGS. 1 to 4, the normal line N of the inner holding plate 37 extending away from the first side wall 16 extends along the direction in which the bottom wall 12 extends. The normal line N1 in FIG. 3 and the normal line N2 in FIG. 4 indicate in-plane components of the normal line N in the respective cross sections. The inner holding plate 37 supports the upper holding plate 35 by contacting the bottom wall 12.

  1 to 3, the inner holding plate 37 has a side end portion 37 a extending from the end on the first side wall 16 side of the tip edge portion 35 a of the upper holding plate 35 toward the bottom wall 12. The side end portion 37 a is in contact with the first side wall 16. That is, the first side wall 16 and the side end portion 37a of the inner holding plate 37 are arranged without being spaced from each other, and the first side wall 16 and the inner holding plate are moved closer to the second side wall 19 from the side end portion 37a. The space | interval with 37 is wide. Further, as clearly shown in FIG. 3, the side end portion 37 a of the present embodiment extends in a direction orthogonal to the bottom wall 12.

  The front end of the inner holding plate 37 is located on the upper surface of the bottom wall 12, and a locking piece 39 projects from the front end. A locking hole 14 for locking the locking piece 39 is formed in the bottom wall 12 by punching.

  Referring to FIG. 6, in the blank 10 ′, the inner holding plate 37 protrudes from the upper holding plate 35 toward the opposite side of the outer holding plate 33 in a direction orthogonal to the folding line 38. That is, the inner holding plate 37 extends outward in the vertical direction and outward in the horizontal direction. Further, the side end portion 37 a of the inner holding plate 37 extends substantially at right angles to the folding line 38. The side end portion 37a of the inner holding plate 37 of the present embodiment has the same dimensions as the overall height of the first side wall 16 (see FIG. 1).

  As shown in FIGS. 3 and 14, the folding plate 40 has a rectangular shape that extends from the upper surface of the bottom wall 12 to the lower surface of the edge plate 22 of the second side wall 19 and is long in the vertical direction. As clearly shown in FIG. 14, the folding plate 40 is connected to the edge of the inner holding plate 37 positioned toward the second side wall 19 where the holding portion 32 is continuous via a folding line 41 made of a reverse ruled line. ing. The folding line 41 extends parallel to the folding line 34 between the outer plate 20 and the outer holding plate 33.

  Referring to the blank of FIG. 6, the folding plate 40 protrudes from the inner holding plate 37 toward the inner plate 24 in a direction intersecting the folding curve 41. The folding plate 40 and the inner plate 24 of this embodiment are separated by providing a punching portion 42. A punching portion 43 for preventing the edge plate 22, the upper holding plate 35, and the folding plate 40 from overlapping is provided on the upper holding plate 35 side of the folding plate 40.

  Referring to FIG. 3, the first side wall 16 has a second folding plate disposed between the outer plate 20 and the inner plate 24 of the second side wall 19 so as to be positioned on the outer surface of the first folding plate 40. 44 is provided. As clearly shown in FIG. 11, the folding plate 44 has a substantially right trapezoidal shape, and is provided at the end of the first side wall 16 via a folding line 45 formed of a general ruled line. The folding line 45 extends parallel to the folding line 41 (shown in FIG. 14) between the inner holding plate 37 and the folding plate 40.

  Referring to the blank of FIG. 6, the folding plate 44 protrudes from the first side wall 16 toward the outer holding plate 33 of the holding portion 32. In the present embodiment, the folding plate 44 and the outer holding plate 33 are separated from each other by a punching portion 46.

  Referring to FIG. 3, the folding plate 44 of the first side wall 16 is provided with a protruding plate 47 disposed between the outer plate 20 and the inner plate 24 of the second side wall 19. The protruding plate 47 is connected to the end of the folding plate 44 of the first side wall 16 via a folding line 48 made of a general ruled line. The protruding plate 47 extends from the end of the folding plate 44 of the first side wall 16 toward the inner plate 24. The tip of the protruding plate 47 of this embodiment is in contact with the inner plate 24 of the second side wall 19.

  Referring to FIG. 6, in the blank 10 ′ of the present embodiment, the protruding plate 47 protrudes from the first side wall 16 toward the outside in the vertical direction. The dimension of the protruding plate 47 in the vertical direction (the vertical direction in FIG. 6) of the blank 10 ′ is preferably substantially equal to the width of the edge plate 22 (the horizontal dimension in FIG. 6).

  Referring to FIG. 4, the first side wall 16 is provided with a support plate 49 disposed between the outer holding plate 33 and the inner holding plate 37 of the holding portion 32. The support plate 49 is connected to the end of the first side wall 16 via a folding line 50 made of a general ruled line, and extends from the end of the first side wall 16 toward the inner holding plate 37. The front end 49 a of the support plate 49 of this embodiment is in contact with the inner holding plate 37 of the holding unit 32.

  Referring to FIG. 6, in the blank 10 ′ of the present embodiment, the support plate 49 protrudes from the first side wall 16 toward the outside in the vertical direction, has a similar shape smaller than the upper holding plate 35, and supports The tip 49a of the plate 49 extends outward in the vertical direction and outward in the horizontal direction. Specifically, the angle formed between the tip 49a of the support plate 49 and the folding line 50 is the angle formed between the folding line 36 and the folding line 38 (the leading edge 35a (shown in FIG. 2) of the upper holding plate 35). It is almost the same.

  Referring to FIG. 1 together with FIG. 6, in the outer plate 20 and the inner plate 24 of the second side wall 19, the central shin 4 (step direction) of the cardboard sheet 1 is set to extend in the vertical direction. Further, even in the outer holding plate 33, the inner holding plate 37, and the folding plate 40 constituting the holding portion 32, the intermediate shin 4 is set to extend in the vertical direction. Thereby, when the trays 10 are stacked, a compressive strength for resisting the vertical load applied to the tray 10 is secured.

  Further, in the blank 10 ′ of the present embodiment, the shape and size of the upper holding plate 35 are such that the inner holding plate 37 has the maximum outer dimensions in the vertical and horizontal directions of the other portions of the blank 10 ′ (two-dot chain lines in the figure). (See L)). Further, the shape and size of the folding plate 40 are set so that the folding plate 40 does not become larger than the maximum outer dimensions in the vertical and horizontal directions of the other portions of the blank 10 '.

  According to the tray 10 configured in this manner, the upper holding plate 35 extends inward from the upper end of the first side wall 16 along the direction in which the bottom wall 12 extends. The upper holding plate 35 of the lower tray 10 can support the bottom wall 12 of the upper tray 10. For this reason, even if the first side wall 16 has a single-layer structure and the first side wall 16 is thin, the positional deviation between the upper tray 10 and the lower tray 10 can be allowed. That is, when stacking the trays 10 up and down, even if the positions of the upper tray 10 and the lower tray 10 are slightly shifted, the upper tray 10 is unlikely to fall into the lower tray 10. The stability of the tray 10 can be improved.

  A side end portion 37 a of the inner holding plate 37 is in contact with the first side wall 16. That is, since the first side wall 16 and the side end portion 37 a of the inner holding plate 37 are arranged without a gap, the side end portion 37 a of the inner holding plate 37 is arranged away from the first side wall 16. Compared with the case where it has, the goods accommodated in the inside of the tray 10 are hard to be damaged.

  The inner holding plate 37 extends along a plane orthogonal to the bottom wall 12 such that the normal N of the inner holding plate 37 extending away from the first side wall 16 extends along the direction in which the bottom wall 12 extends. It extends. For this reason, when stacking the trays 10 up and down, the compressive strength against the load in the vertical direction applied to the tray 10 can be secured.

  Since the support plate 49 is disposed between the outer holding plate 33 and the inner holding plate 37 of the holding portion 32 and the support plate 49 extends toward the inner holding plate 37, the inner holding plate is interposed via the support plate 49. 37 is supported by the outer holding plate 33. For this reason, since the movement of the inner holding plate 37 in the direction approaching the outer holding plate 33 is restricted by the support plate 49, the distance between the outer holding plate 33 and the inner holding plate 37 can be held, and the articles can be stabilized inside the tray 10. Can be accommodated in a state.

  Further, a protruding plate 47 disposed between the outer plate 20 and the inner plate 24 is connected to the folding plate 44 of the first side wall 16, and the protruding plate 47 extends toward the inner plate 24. Yes. For this reason, the inner plate 24 is supported by the outer plate 20 via the protruding plate 47 and the folding plate 44, and the movement toward the outer plate 20 is restricted by the protruding plate 47 and the folding plate 44. Therefore, since the space | interval of the inner plate 24 with respect to the outer plate 20 can be hold | maintained, an article | item can be accommodated in the inside of the tray 10 in a stable state.

  Further, in the tray 10 of the present embodiment, the folding plate 40 formed on the holding portion 32 and the folding plate 44 formed on the first side wall 16 are disposed between the outer plate 20 and the inner plate 24 of the second side wall 19. Has been. The inner plate 24 of the second side wall 19 is supported by the outer plate 20 via two folding plates 40 and 44, and the movement toward the outer plate 20 is restricted by the folding plates 40 and 44. Therefore, since the space | interval of the inner plate 24 with respect to the outer plate 20 can be hold | maintained, an article | item can be accommodated in the inside of the tray 10 in a stable state.

  Since the folding plates 40 and 44 can widen the interval between the outer plate 20 and the inner plate 24, that is, the thickness of the second side wall 19 (the width of the edge plate), the stability when stacking the trays 10 is also improved. Can be improved. Although the first side wall 16 has a single-layer structure, the both end portions of the first side wall 16 have a three-layer structure by the holding portions 32. Most of the second side wall 19 has a two-layer structure, but both end portions of the second side wall 19 have a four-layer structure with two folding plates 40 and 44. Therefore, the rigidity of the tray 10 in the direction in which the bottom wall 12 is bent or distorted can be improved.

  Next, an operation of assembling the tray 10 shown in FIG. 1 using the blank 10 ′ shown in FIG. 6 will be described with reference to FIGS. 11 to 14.

  First, as shown in FIG. 11, the blank 10 ′ (shown in FIG. 6) is mountain-folded (normally folded) along the folding line 17, and the blank 10 ′ is positioned so that the folding plate 44 is positioned on the bottom wall 12. Fold the mountain at the folding line 45. Next, as shown in FIG. 12, the blank 10 ′ is folded in a fold line 21, and then the blank 10 ′ is folded in a fold line 34 as shown in FIG. 13. Thereby, the outer plate 20 of the second side wall 19 is disposed outside the second folding plate 44. In addition, an outer holding plate 33 of the holding portion 32 is disposed on the outer side of the first side wall 16. Thereafter, the blank 10 ′ is folded at a folding line 50.

  Next, as shown in FIG. 14, the blank 10 ′ is folded in a folding line 36 so that the upper holding plate 35 of the holding portion 32 is positioned on the bottom wall 12, and the upper edge of the first side wall 16 is turned upward. Cover with the holding plate 35. Next, the blank 10 ′ is folded in a folding line 38 so that the inner holding plate 37 of the holding portion 32 faces the bottom wall 12, and the inner holding plate 37 is placed inside the first side wall 16. Then, the locking piece 39 of the inner holding plate 37 is locked in the locking hole 14 of the bottom wall 12. Further, the blank 10 ′ is valley-folded (reversely folded) along the folding line 41, and the first folding plate 40 is disposed inside the second folding plate 44. Thereafter, the blank 10 ′ is folded at a folding line 38.

  Finally, as shown in FIG. 1, the blank 10 ′ is folded at a folding line 23 so that the edge plate 22 of the second side wall 19 is positioned on the bottom wall 12, and then the inner plate 24 is formed on the bottom wall 12. The blank 10 ′ is folded in a folding line 25 so as to face. Then, the locking piece 26 of the inner plate 24 is locked in the locking hole 13 of the bottom wall 12. As a result, the inner plate 24 is disposed inside the outer plate 20, and the second side wall 19 is formed with the folding plate 40 of the holding portion 32 and the folding plate 44 of the first side wall 16 sandwiched therebetween. .

  Thus, the tray 10 is easily assembled manually by bending predetermined portions of the blank in order. In addition, since the second folding plate 44 connected to the first side wall 16 is sandwiched between the first folding plate 40 and the outer plate 20 of the second side wall 19, the development of the second side wall 19 is performed. Directional movement can be prevented. Moreover, in the blank of the tray 10, the holding portion 32 is formed side by side next to the first side wall 16 having a single layer structure. Therefore, the area of the forming material can be reduced by 20% to 30% compared to the case where the first side wall 16 has a two-layer structure including an outer plate and an inner plate.

(Modification of the first embodiment)
FIG. 15 shows a modification of the tray 10 of the first embodiment. In the tray 10 shown in FIG. 15, the second side wall 19 is not provided with a positioning projection. Even in this case, as shown in FIG. 5, when the trays 10 are stacked up and down, the upper holding plate 35 of the lower tray 10 supports the bottom wall 12 of the upper tray 10, so that the upper tray 10 However, it is difficult to fall inside the lower tray 10, so that the stability when stacking the trays 10 up and down can be improved. Moreover, since the upper tray 10 and the lower tray 10 are not locked, workability at the time of loading and unloading the tray 10 is improved.

(Second Embodiment)
16 to 18 show a tray 10 according to the second embodiment. FIG. 19 is a plan view of the blank 10 ′ of the tray 10 according to the second embodiment.

  Referring to FIG. 16, the inner holding plate 37 of the holding portion 32 according to the present embodiment has a trapezoidal shape configured such that the width becomes narrower from the tip edge portion 35 a of the upper holding plate 35 toward the bottom wall 12. The inner holding plate 37 is inclined with respect to the bottom wall 12 by bending the blank 10 ′ (shown in FIG. 19) along the folding line 38 so that the inner holding plate 37 intersects the upper holding plate 35. Thus extending toward the bottom wall 12 and disposed inside the first side wall 16. That is, as shown in FIGS. 16 to 18, the normal line N of the inner holding plate 37 extends toward the bottom wall 12 toward the side opposite to the first side wall 16. The normal line N1 in FIG. 17 and the normal line N2 in FIG. 18 indicate in-plane components of the normal line N in the respective cross sections.

  In other words, the inner holding plate 37 is directed toward the corner of the tray 10 defined by the bottom wall 12, the first side wall 16, and the second side wall 19 from the leading edge 35 a of the upper holding plate 35 toward the bottom wall 12. As described above, it extends with an inclination with respect to the bottom wall 12.

  Referring to FIG. 19, in the blank 10 ′, the side end portion 37 a of the inner holding plate 37 of the present embodiment extends substantially parallel to the lateral direction. The side end portion 37a of the inner holding plate 37 of the present embodiment has a size larger than the overall height of the first side wall 16 (see FIG. 16).

  According to this configuration, the inner holding plate 37 is inclined with respect to the bottom wall 12 such that the normal line N of the inner holding plate 37 extends toward the bottom wall 12 toward the side opposite to the first side wall 16. The space for accommodating articles becomes wider as the bottom wall 12 is approached. For this reason, even if it is a case where the upper holding plate 35 is provided in the holding part 32, the reduction | decrease of the space for accommodating articles | goods can be suppressed.

  Moreover, in blank 10 'of this embodiment, compared with the case where the side edge part 37a of the inner side holding plate 37 is extended in the direction orthogonal to the front end edge part 35a of the upper side holding plate 35, in blank 10'. The vertical dimension of the inner holding plate 37 can be suppressed. For this reason, the vertical dimension of the upper holding plate 35 can be increased and the area of the upper holding plate 35 can be increased within the range of the maximum external dimension (see the two-dot chain line L in the figure) of the other part of the blank 10 ′. . Thereby, the stability at the time of stacking the tray 10 can be improved.

  The tray 10 of the present invention is not limited to the configuration of the above embodiment, and various modifications can be made.

  The tray 10 is not limited to a rectangular shape in plan view, and may be, for example, an octagonal shape in plan view.

  In the above embodiment, an example in which the tray 10 is formed by the paper cardboard sheet 1 has been described. However, the tray 10 may be formed by a resin cardboard sheet. Further, the tray 10 is not limited to a corrugated cardboard sheet, and the tray 10 may be formed by a single layer cardboard or a resin sheet.

DESCRIPTION OF SYMBOLS 1 ... Corrugated cardboard sheet 2 ... Front liner 3 ... Back liner 4 ... Middle shin 10 ... Tray 10 '... Tray blank 11 ... Opening 12 ... Bottom wall 12a ... 1st side 12b ... 2nd side 13 ... Locking hole 14 ... Engagement Stop hole 16 ... First side wall 17 ... Folding curve 19 ... Second side wall 20 ... Outer plate 21 ... Folding curve 22 ... Edge plate 23 ... Folding curve 24 ... Inner plate 25 ... Folding curve 26 ... Locking piece 27 ... Positioning protrusion 28 ... Cutting line 29 ... Bending curve 30 ... Bending curve 32 ... Holding part 33 ... Outer holding plate 34 ... Bending curve 35 ... Upper holding plate 35a ... Tip edge 36 ... Bending curve 37 ... Inner holding plate 37a ... Side end 38 ... Folding curve 39 ... Locking piece 40 ... First folding plate 41 ... Folding curve 42 ... Punching portion 43 ... Punching portion 44 ... Second folding plate 45 ... Folding curve 46 ... Punching portion 47 ... Projection plate 48 ... Folding curve 49 ... Support plate 49a ... Tip 50 ... Folding curve

Claims (7)

A bottom wall having a first side and a second side extending to intersect the first side;
A first side wall of a single-layer structure erected on the first side;
A second side wall of a two-layer structure erected on the second side;
A holding portion that holds the first side wall and the second side wall in an upright state with respect to the bottom wall;
The second sidewall is
An outer plate connected to the bottom wall;
An edge plate extending inward from the tip of the outer plate along the direction in which the bottom wall extends;
An inner plate extending from the tip of the edge plate toward the bottom wall and disposed inside the outer plate,
The holding part is
An outer holding plate that is connected to the outer plate of the second side wall and is arranged outside the first side wall;
A crosspiece extending inwardly along the direction in which the bottom wall extends from the upper end of the outer holding plate so as to cover the upper end of the first side wall;
An inner holding plate extending toward the bottom wall from a tip edge portion of the crosspiece opposite to the outer holding plate, and disposed inside the first side wall;
The tray, wherein the leading edge of the crosspiece extends in a direction intersecting the first side wall so as to approach the first side wall as the distance from the second side wall increases. The inner holding plate has a side end extending from the end on the first side wall side of the front edge of the crosspiece toward the bottom wall,
The tray according to claim 1, wherein the side end portion of the inner holding plate is in contact with the first side wall.   The inner holding plate extends along a plane orthogonal to the bottom wall such that a normal line of the inner holding plate extending away from the first side wall extends along a direction in which the bottom wall extends. The tray according to claim 1 or 2.   The inner holding plate extends obliquely with respect to the bottom wall such that a normal line of the inner holding plate extending away from the first side wall extends from the tip edge toward the bottom wall. The tray according to claim 1 or 2. A support plate disposed between the outer holding plate and the inner holding plate of the holding portion is connected to the first side wall,
The tray according to any one of claims 1 to 4, wherein the support plate extends from a tip of the first side wall toward the inner holding plate. The first side wall is provided with a projecting plate arranged between the outer plate and the inner plate of the second side wall,
The tray according to any one of claims 1 to 5, wherein the protruding plate extends from a tip end of the first side wall toward the inner plate. A bottom wall having a first side and a second side extending in a direction intersecting the first side;
A first side wall connected to the first side;
A second side wall connected to the second side;
A holding portion for holding the first side wall and the second side wall in an upright state with respect to the bottom wall;
The second sidewall is
An outer plate connected to the second side;
An edge plate connected to the tip of the outer plate;
An inner plate connected to the tip of the edge plate,
The holding part is
An outer holding plate that is connected to the outer plate of the second side wall and extends in the same direction as the first side wall;
A crosspiece having a leading edge that is connected to the outer holding plate and extends obliquely with respect to the extending direction of the outer holding plate;
A tray blank, comprising: an inner holding plate connected to the front edge of the crosspiece.

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