JP2019142536A - tray - Google Patents

Abstract

To provide a tray with which contents can be easily put in and out and which can be stably stacked with a simple structure.SOLUTION: A tray 1 includes: an end wall 11 provided in an erecting manner on an end part of a first direction of a bottom wall; a side wall 12 provided in an erecting manner on an end part of a second direction of the bottom wall; a folding wall 13 provided in continuation to an end part of a first direction of the side wall 12 via a side folding line L10. Between the bottom wall and the side wall 12, a second notch part 35 cuts into from the end part of the first direction toward inside, the folding wall 13 is in a posture inclined so as to separate from the bottom wall toward the tip from the side folding line L10 in a state of being folded along the side folding line L10 as if overlapping the end wall 11, in the process that the folding wall 13 is held on the end wall 11 while being pressed against the side of the bottom wall, the side wall 12 is deformed so that a lower end part of the side folding line L10 protrudes outwardly in the second direction with a line that connects an abutment part 35A of the second notch part 35 and an upper end part of the side folding line L10 being the fulcrum.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tray.

  There are known trays that can be stacked one above the other.

  For example, the wrapping paper box described in Patent Literature 1 includes a pair of side surfaces and a wife surface centering on the bottom surface. An overhang is formed at the free end of each side surface, and an upper surface member is connected to the free end of each end face. Inclined folding pieces are provided at both ends of each side surface, and projecting pieces are formed at the free end corners of the folding pieces. In this paper box, a side surface and a wife surface are opened outward to form a box. The upper surface member extends inward from the wife surface to block a part of the upper surface opening of the box, and the overhanging portion and the projecting piece protrude upward from the upper surface member. When a plurality of the paper boxes are stacked, the bottom surface of the upper paper box is placed on the upper surface member of the lower paper box. Further, each side surface of the upper paper box is located inside the protruding portion of the lower paper box, and each wife face of the upper paper box is located inside the protruding piece of the lower paper box. As a result, the paper boxes could be stacked in a stable state.

No. 1-20276

  The paper box described above was a tray with a crosspiece provided with an upper surface member to ensure stable stacking. Since the upper surface member conceals a part of the upper surface opening, there is a problem that it is difficult to take in and out the contents. In addition, the above-described paper box requires many configurations (such as an overhang, an upper surface member, and a projecting piece) in order to stably stack the paper boxes, which increases the manufacturing cost and complicates the assembly process. there were.

  In order to solve the above-mentioned problems, the present invention provides a tray in which contents can be easily taken in and out and can be stably stacked with a simple structure.

  In order to achieve the above object, the tray of the present invention includes a bottom wall, a first side wall erected at an end portion in the first direction of the bottom wall, and a second crossing the first direction of the bottom wall. A second side wall erected at the end in the direction, and a folded wall connected to the end in the first direction of the second side wall via a folding line, the bottom wall and the second wall A notch is cut inward from the end in the first direction between the side walls, and the folded wall is folded along the folding line so as to overlap the first side wall. In a process in which the folding wall is inclined toward the tip and away from the bottom wall, and the folding wall is held on the first side wall while being pressed against the bottom wall, the second side wall is The lower end portion of the folding line is located outside in the second direction with a line connecting the projecting portion of the cut portion and the upper end portion of the folding line as a fulcrum. It deforms so as to protrude.

  In this case, in a state where the bottom wall and the second side wall are flatly developed, the folding line is formed in a state inclined from the cut portion toward the outside in the second direction toward the outside in the first direction. The angle formed by the curved line and the outer edge of the folded wall in the second direction is preferably set to an obtuse angle.

  In another case, the folded wall extends obliquely inward in the second direction from the folding line in a state where the bottom wall and the second side wall are flatly developed, and the folding curve and the folding wall It is preferable that the angle formed with the outer edge portion in the second direction is set to an obtuse angle.

  In other cases, the folded wall extends obliquely outward from the folding line in the second direction in a state in which the bottom wall and the second side wall are flatly spread, and the folding curve and the folding wall are extended. It is preferable that the angle formed with the outer edge of the wall in the second direction is set to an obtuse angle.

  In this case, a reverse folding curve is formed on the second side wall so as to extend obliquely from the abutting portion of the cut portion to the upper end portion of the folding curve so as to fold the second side wall. Is preferred.

  In this case, the first side wall is formed in a double structure facing the first outer wall and the first inner wall, and the folded wall is pressed against the bottom wall while the first outer wall and the first inner wall. It is preferable to be sandwiched between and held.

  In this case, the second side wall is formed in a double structure facing the second outer wall and the second inner wall, and the folding wall is formed at the end of the second outer wall in the first direction via the folding line. It is preferable that they are continuously provided.

  According to the present invention, the contents stored in the tray can be easily taken in and out. In addition, trays can be stacked stably with a simple structure.

It is a perspective view which shows the tray which concerns on one Embodiment of this invention. It is a top view which shows the blank of the tray which concerns on one Embodiment of this invention. It is a top view which shows a part of blank of the tray which concerns on one Embodiment of this invention. It is a perspective view explaining the assembly operation of the tray which concerns on one Embodiment of this invention. It is a tray which concerns on one Embodiment of this invention, Comprising: It is a perspective view which shows the right side of the tray in the middle of an assembly. It is a perspective view explaining formation of the projection part of the tray concerning one embodiment of the present invention. It is a perspective view which shows the state which accumulated the tray which concerns on one Embodiment of this invention. It is a top view which shows the blank of the tray which concerns on the modification of one Embodiment of this invention. It is a top view which shows the blank of the tray which concerns on the other modification of one Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawing, “Fr” indicates “front”, “Rr” indicates “rear”, “L” indicates “left”, “R” indicates “right”, and “U” indicates “ “Up” indicates “D” indicates “Down”. The front-rear direction (second direction) is orthogonal (intersect) to the left-right direction (first direction), and the up-down direction is orthogonal (intersect) to the front-rear direction and the left-right direction. In this specification, terms indicating directions and positions are used, but these terms are used for convenience of explanation and do not limit the technical scope of the present invention.

  The tray 1 will be described with reference to FIGS. 1 to 3. FIG. 1 is a perspective view showing the tray 1. FIG. 2 is a plan view showing the blank 5 of the tray 1. FIG. 3 is a plan view showing a part of the blank 5.

[Tray Overview]
As shown in FIG. 1, the tray 1 is formed in a substantially rectangular parallelepiped shape as a whole, with an end wall 11 and a side wall 12 erected on the peripheral edge of the bottom wall 10 (see FIG. 2). At the upper end surface of the tray 1, an opening 1 </ b> A for taking in and out the contents (not shown) placed on the bottom wall 10 is opened. At the lower part of the four corners of the tray 1, four projecting portions 18 projecting outward in the left-right direction are formed. Each protrusion 18 of the upper tray 1 abuts on the upper end surface of each side wall 12 of the lower tray 1 so that a plurality of trays 1 can be stacked.

  The tray 1 is formed by assembling the blank 5 shown in FIG. The blank 5 is formed by punching out a piece of paper corrugated cardboard with a punching die or the like. The corrugated cardboard sheet is, for example, a double-faced corrugated cardboard sheet in which a front liner 9B and a back liner 9C (see FIG. 4) are bonded to a corrugated center 9A. FIG. 2 shows the front liner 9B side. In the present specification, the direction parallel to the center 9A of the corrugated cardboard sheet is referred to as the “step direction”, and the direction orthogonal to the step direction is referred to as the “flow direction”. In the drawing, “X” indicates “stage direction”, and “Y” indicates “flow direction”. Further, in this specification, “upper (top)”, “lower (bottom)” and similar terms are used for the upper (top), the lower (bottom) and the bottom in the assembled state (use state) of the tray 1. It refers to a similar concept.

[blank]
As shown in FIG. 2, the blank 5 includes a bottom wall 10, a pair of end walls 11, a pair of side walls 12, and four folding walls 13.

  The bottom wall 10 is formed in a substantially rectangular shape that is long in the step direction. The pair of end walls 11 as an example of the first side wall are connected to both end portions in the step direction of the bottom wall 10 via the first folding line L1. A pair of side walls 12 as an example of the second side wall are connected to both ends in the flow direction of the bottom wall 10 via a third folding line L3. The pair of end walls 11 are formed symmetrically in the step direction across the bottom wall 10, and the pair of side walls 12 are formed symmetrically in the flow direction across the bottom wall 10. The four folding walls 13 are formed symmetrically in the flow direction with the pair of end walls 11 sandwiched therebetween, and are formed symmetrically in the step direction with the pair of sidewalls 12 sandwiched therebetween. In the following description, mainly one end wall 11, one side wall 12, and one folded wall 13 will be described.

<End wall>
The end wall 11 is formed in a substantially rectangular shape that is long in the flow direction as a whole. The end wall 11 includes a first outer wall 20, a first frame portion 21, and a first inner wall 22.

(First outer wall)
The first outer wall 20 is connected to the stepwise end of the bottom wall 10 via the first folding line L1. The first outer wall 20 is formed in a substantially rectangular shape that is long in the flow direction. Precisely, the first outer wall 20 is formed in a substantially trapezoidal shape that gradually becomes wider from the bottom wall 10 side toward the tip. The dimension in the step direction (extension dimension) of the first outer wall 20 is set shorter (for example, about 1/4) than the dimension in the step direction of the bottom wall 10. In addition, a pair of first cut portions 25 are cut between the bottom wall 10 and the first outer wall 20 from both ends in the flow direction toward the inside. The first cut portion 25 is a groove formed along the first folding line L1. The first cut portion 25 may be omitted.

(1st picture frame)
The first frame portion 21 is provided between the first outer wall 20 and the first inner wall 22 via two second folding lines L2. The first frame portion 21 is formed in a substantially rectangular shape elongated in the flow direction. Precisely, the first frame portion 21 is formed in a substantially trapezoidal shape that gradually becomes narrower from the first outer wall 20 side toward the tip. The extension dimension of the first frame portion 21 is set to be approximately the same as the thickness of the cardboard sheet.

(First inner wall)
The first inner wall 22 is connected to the distal end portion of the first frame portion 21 via the second folding line L2. The first inner wall 22 is formed in a substantially trapezoidal shape such that the first outer wall 20 is inverted around the first frame portion 21. In the vicinity of the center of the front end portion of the first inner wall 22, an engagement convex portion 26 that slightly protrudes outward is formed.

<Sidewall>
The side wall 12 is formed in a substantially rectangular shape that is long in the step direction as a whole. The side wall 12 includes a second outer wall 30, a second frame portion 31, a second inner wall 32, and a laminated floor portion 33.

(Second outer wall)
The second outer wall 30 is connected to the end of the bottom wall 10 in the flow direction via the third folding line L3. The second outer wall 30 is formed in a substantially rectangular shape that is long in the step direction. Precisely, the second outer wall 30 is formed in a substantially trapezoidal shape that gradually becomes narrower from the bottom wall 10 side toward the tip. The dimension (extension dimension) in the flow direction of the second outer wall 30 is set to be substantially the same as the extension dimension of the first outer wall 20. In addition, a pair of second cut portions 35 are cut between the bottom wall 10 and the second outer wall 30 (side wall 12) from both ends in the step direction (first direction) toward the inside. The second cut portion 35 is a groove formed along the third folding line L3, and the length of the second cut portion 35 in the step direction is shorter than the length of the first cut portion 25 in the flow direction. Is set.

(2nd picture frame)
The second frame 31 is provided between the second outer wall 30 and the second inner wall 32 via two fourth folding lines L4. The second frame portion 31 is formed in a substantially rectangular shape elongated in the step direction. The extension dimension of the second frame portion 31 is set slightly longer than the thickness of the cardboard sheet.

(Second inner wall)
The second inner wall 32 is connected to the distal end portion of the second frame portion 31 via the fourth folding line L4. The second inner wall 32 is formed in a substantially trapezoidal shape such that the second outer wall 30 is inverted around the second frame portion 31.

(Laminated floor)
The laminated floor portion 33 is connected to the distal end portion of the second inner wall 32 via the fifth folding line L5. The laminated floor 33 is formed in a substantially rectangular shape having a long step direction. The extension dimension of the laminated floor 33 is set to approximately half the dimension of the bottom wall 10 in the flow direction. At the corners on both sides in the step direction of the laminated floor 33, a substantially rectangular engaging recess 36 is cut out.

  The first to fourth folding lines L1 to L4 are general ruled lines in which the corrugated cardboard sheet is crushed linearly in the thickness direction from the back liner 9C side. The first to fourth folding lines L1 to L4 have a function of bending (normally folding) the cardboard sheet so that the back liner 9C faces inward. The fifth folding line L5 is a lead ruled line in which a plurality of cutting lines are arranged at predetermined intervals on the general ruled line. The fifth folding line L5 has a function of bending (reversely folding) the cardboard sheet so that the front liner 9B faces inward. The first to fourth folding lines L1 to L4 are not limited to general-purpose ruled lines, and may be any line as long as the cardboard sheet is normally folded. Further, the fifth folding line L5 is not limited to the lead ruled line, but may be any line as long as it is a line for reversely folding the cardboard sheet.

<Folding wall>
As shown in FIGS. 2 and 3, the folding wall 13 is connected to the end portion in the step direction (first direction) of the second outer wall 30 (side wall 12) via the side folding curve L <b> 10. (C1, C7) The folding wall 13 is formed in a substantially rectangular shape that is long in the step direction. The dimension of the folded wall 13 in the step direction (extension dimension) is set to approximately half the dimension of the bottom wall 10 in the flow direction.

  As shown in FIG. 3, the inner edge 13 </ b> A in the flow direction of the folded wall 13 is inclined outward in the flow direction from the second outer wall 30 side toward the tip, and the tip side of the inner edge 13 </ b> A is outside in the flow direction. Is curved. The outer edge 13 </ b> B in the flow direction of the folding wall 13 is formed on an extension line (exactly slightly shifted) of the fourth folding line L <b> 4 between the second outer wall 30 and the second frame 31. Yes. The side fold curve L10 is a general ruled line, but is not limited thereto, and may be any line as long as the cardboard sheet is normally folded.

(Side folding curve)
As shown in FIGS. 2 and 3, in the state where the bottom wall 10 and the side wall 12 are flatly developed, the side folding line L10 is directed outward from the second cut portion 35 in the flow direction (second direction). It is formed in a state inclined to the outside in the step direction (first direction). The inner end (lower end) of the side folding line L10 is located on the extension line of the first folding line L1 (exactly slightly shifted), and the outer end (upper end) of the side folding line L10. Is located outside the first folding line L1 in the step direction. As shown in FIG. 3, the angle θ1 formed by the side folding line L10 and the extension line of the first folding line L1 is set to about 5 degrees, for example. Further, an angle θ2 formed by the side folding line L10 and the outer edge 13B of the folding wall 13 is set to an obtuse angle (for example, about 95 degrees).

(Reverse folding curve)
Further, as shown in FIGS. 2 and 3, a reverse folding curve L20 is formed in the vicinity of the end of the second outer wall 30 (side wall 12) in the step direction. As shown in FIG. 3, the reverse folding curve L20 extends obliquely from the abutting portion 35A of the second cut portion 35 to the outer end portion (upper end portion) of the side folding curve L10. The reverse folding curve L20 is a reverse ruled line in which a corrugated cardboard sheet is crushed linearly in the thickness direction from the front liner 9B side, and has a function of valley-folding the second outer wall 30 (side wall 12). In addition, although the reverse folding line L20 was a reverse ruled line, it is not restricted to this, What kind of thing may be used as long as it is a line for reversely folding a cardboard sheet | seat.

[Tray assembly]
Next, the assembly operation of the tray 1 will be described with reference to FIGS. 1 and 4 to 6. FIG. 4 is a perspective view for explaining the assembly operation of the tray 1. FIG. 5 is a perspective view showing the right side of the tray 1 during assembly. FIG. 6 is a perspective view for explaining the formation of the protruding portion 18 of the tray 1. Here, as an example, a case where an operator assembles the tray 1 will be described. In order to simplify the description, the description will be given mainly focusing on one end wall 11, one side wall 12, and one folded wall 13.

  The tray 1 is assembled by appropriately bending the blank 5 with the back liner 9C facing upward.

  As shown in FIG. 4, the worker bends the second outer wall 30 along the third folding line L <b> 3 and raises the second outer wall 30 with respect to the bottom wall 10. Further, the operator bends the second frame portion 31 inward (bottom wall 10 side) along the fourth folding line L4, and bends the second inner wall 32 downward along the fourth folding line L4. In addition, the worker bends the laminated floor portion 33 inward along the fifth folding line L <b> 5 and overlaps the laminated floor portion 33 on the bottom wall 10. In this state, the pair of side walls 12 are erected on both front and rear end portions (end portions in the second direction intersecting the first direction) of the bottom wall 10 and are opposed to each other with the bottom wall 10 interposed therebetween. The side wall 12 is formed in a double structure facing the second outer wall 30 and the second inner wall 32. Moreover, the front-end | tip part of a pair of laminated floor part 33 is faced | matched by the approximate center of the front-back direction of the bottom wall 10. FIG. The pair of laminated floor portions 33 overlap with the bottom wall 10 to form a double wall. The second frame 31 is arranged in a posture inclined downward from the outside to the inside, but is not limited to this, and is arranged in a substantially horizontal (substantially parallel to the bottom wall 10) posture. May be.

  Next, as shown in FIGS. 4 and 5, the operator bends the folding wall 13 inward along the side folding line L10 and arranges the folding wall 13 in an upright position on the first folding line L1. . The folding wall 13 (outer edge 13B) is inclined upward from the side folding curve L10 toward the tip.

  Next, as shown in FIG. 1, the worker bends the first outer wall 20 along the first folding line L <b> 1 and raises the first outer wall 20 with respect to the bottom wall 10. Further, the worker bends the first frame portion 21 inward (bottom wall 10 side) along the second folding line L2, and bends the first inner wall 22 downward along the second folding line L2. In this state, the pair of end walls 11 are erected on both left and right end portions (end portions in the first direction) of the bottom wall 10, and are opposed to each other with the bottom wall 10 interposed therebetween. The end wall 11 is formed in a double structure facing the first outer wall 20 and the first inner wall 22. In addition, the engagement convex part 26 of the 1st inner wall 22 is fitted to the engagement recessed part 36 of the butt | matching part of a pair of laminated floor part 33. FIG. Thereby, the end wall 11 and the side wall 12 can be maintained in a double structure.

  By the way, the end wall 11 (the 1st outer wall 20, the 1st frame part 21, and the 1st inner wall 22) has become a double wall, and has wrapped the pair of folding | turning walls 13 in it. Specifically, the folding wall 13 is sandwiched between the first outer wall 20 and the first inner wall 22 while being pressed against the bottom wall 10 (downward), and is held in a standing posture. As described above, the folded wall 13 is bent from the side folding curve L10 toward the tip while being folded along the side folding curve L10 so as to overlap the first outer wall 20 and the first inner wall 22 (end wall 11). Thus, the posture is inclined so as to be away from the bottom wall 10 (see FIG. 5). For this reason, in the process in which the folded wall 13 is wrapped (held) by the end wall 11, the tip end portion (outer edge portion 13 </ b> B) of the folded wall 13 comes into contact with the inner surface of the first frame portion 21 toward the bottom wall 10. Will be pressed (pressed down) (see thick arrows in FIG. 6).

  As shown in FIG. 6, in conjunction with the pushing down of the tip end portion of the folding wall 13, the second outer wall 30 has a line connecting the abutting portion 35 </ b> A of the second notch 35 and the upper end of the side folding curve L <b> 10. It pivots outward in the front-rear direction as a fulcrum. Specifically, the second outer wall 30 is deformed so as to be valley-folded along the reverse folding curve L20 and to project the lower end portion of the side folding curve L10 outward in the front-rear direction. Then, the substantially triangular pyramid-shaped protrusions 18 having the apexes at both the upper and lower ends of the side folding line L10 and the abutting portion 35A of the second notch 35 are formed at the left and right ends of each second outer wall 30. .

  As described above, the pair of end walls 11 and the pair of side walls 12 are erected substantially perpendicularly to the peripheral edge of the bottom wall 10, and the tray 1 having the opening 1A on the upper end surface is assembled (see FIG. 1). The operator places the contents on the pair of laminated floor portions 33 of the assembled tray 1. A front liner 9B appears on all the surfaces of the tray 1.

[Tray stacking]
Next, the stacking action of the tray 1 will be described with reference to FIG. FIG. 7 is a perspective view showing a state in which the trays 1 are stacked. In the following description, a case where two trays 1 are stacked will be described. Further, for convenience of explanation, the lower tray 1 is also referred to as “lower tray 1 (D)”, a symbol “(D)” is added to each component of the lower tray 1 (D), and the upper tray 1 is referred to as “upper tray”. Also referred to as “1 (U)”, a symbol “(U)” is added to each component of the upper tray 1 (U).

  The operator places the upper tray 1 (U) in the same direction above the lower tray 1 (D), and lowers the upper tray 1 (U). The operator hits the four protruding portions 18 (U) of the upper tray 1 (U) against the upper end surfaces (second frame portion 31 (D)) of the pair of side walls 12 (D) of the lower tray 1 (D). Make contact. As described above, the upper tray 1 (U) is stacked on the lower tray 1 (D).

  In the tray 1 according to the present embodiment described above, the second outer wall 30 of the side wall 12 is the second cut portion 35 in the process of being held by the end wall 11 while the folding wall 13 is pressed against the bottom wall 10 side. The lower end portion of the side fold curve L10 is deformed so as to protrude outward in the front-rear direction with a line connecting the projecting portion 35A and the upper end portion of the side fold curve L10 as a fulcrum. According to this configuration, by holding the folded wall 13 on the end wall 11 while being pushed down, the vicinity of the end of the side wall 12 can be automatically deformed into the substantially triangular pyramidal projection 18. Thereby, since the protrusion part 18 of upper tray 1 (U) can be made to contact | abut to the upper end surface of the side wall 12 of lower tray 1 (D), several trays 1 can be piled up in the stable state. it can. In addition, since a member for ensuring stable stacking of the tray 1 (for example, a crosspiece member covering a part of the opening 1A) can be omitted, the manufacturing cost of the tray 1 can be reduced and the assembly can be performed. The process can be simplified. Furthermore, unlike the so-called tray with a crosspiece, the entire upper end surface of the tray 1 can be the opening 1A, so that the contents stored in the tray 1 can be easily put in and out.

  Further, in the tray 1 according to the present embodiment, the angle θ2 formed by the side folding curve L10 and the outer edge 13B of the folding wall 13 in the blank 5 state is set to be an obtuse angle. According to this configuration, it is possible to increase the protrusion amount of the lower end portion of the side folding curve L10 by increasing the angle θ2, and conversely, by reducing the angle θ2, the lower end portion of the side folding curve L10 can be increased. The amount of protrusion can be reduced. Thereby, the size of the protruding portion 18 (the protruding amount of the lower end portion of the side folding curve L10) is freely set according to the size and shape of the tray 1, the assumed number of stacked layers, and other various specifications and applications. be able to.

  Moreover, according to the tray 1 which concerns on this embodiment, since the side wall 12 can be reversely folded along the reverse folding line L20, the protrusion part 18 (lower end part of the side part folding curve L10) is protruded with small force. be able to. Moreover, since the protrusion part 18 (near the edge part of the side wall 12) can be changed into a beautiful triangular pyramid shape, the designability of the tray 1 can be improved. Note that the reverse folding curve L20 may be omitted. When the reverse folding curve L20 is omitted, the second outer wall 30 is deformed (curved) so as to bend with a line connecting the abutting portion 35A and the upper end of the side folding curve L10 as a fulcrum.

  Moreover, according to the tray 1 which concerns on this embodiment, the end wall 11 becomes a double structure, and it can hold | maintain in an upright position, pressing down the folding | turning wall 13 by pressing down the folding | turning wall 13 from a top, and a side wall The vicinity of the left and right end portions of 12 can be maintained in a state of being deformed into the protruding portion 18.

  Moreover, according to the tray 1 which concerns on this embodiment, the side wall 12 can be formed thickly by making the side wall 12 into a double structure. Thereby, the protrusion part 18 of upper tray 1 (U) can be reliably mounted in the upper end surface of the side wall 12 of lower tray 1 (D). As a result, a plurality of trays 1 can be stably stacked.

  In the tray 1 according to the present embodiment, the outer edge 13B of the folding wall 13 is formed in parallel with the fourth folding line L4 in a state where the bottom wall 10 and the side wall 12 are flatly developed (state of the blank 5). The side folding line L10 is inclined with respect to the first folding line L1, but the present invention is not limited to this.

  As shown in FIG. 8, for example, as the tray 2 (blank 6) according to the modified example, the folding wall 14 extends obliquely from the side folding line L <b> 11 toward the inner side in the flow direction (second direction). Also good. Even in this case, the side folding line L11 is formed obliquely so as to form an obtuse angle with the outer edge 14B of the folding wall 14. When this blank 6 is assembled, the pair of end walls 11 and the pair of side walls 12 are erected on the peripheral edge of the bottom wall 10 in a posture inclined outward, and the opening (not shown) is wider than the bottom wall 10. The tray 2 is formed. When the opening is wider than the bottom wall 10 as in the tray 2, the angle θ2 formed by the side folding curve L11 and the outer edge 14B of the folding wall 14 is set large, and the lower end of the side folding curve L11 It is preferable to increase the protrusion amount.

    Further, as shown in FIG. 9, for example, as the tray 3 (blank 7) according to another modification, the folding wall 15 extends obliquely from the side folding line L12 toward the outside in the flow direction (second direction). It may be provided. In this case, the side folding line L12 may be formed substantially parallel to the first folding line L1, or may be formed obliquely so as to form an obtuse angle with the outer edge 15B of the folding wall 15. When this blank 7 is assembled, contrary to the above-described tray 2, a pair of end walls 11 and a pair of side walls 12 become a tray 3 inclined inward. When the opening (not shown) is narrower than the bottom wall 10 as in the tray 3, the angle θ2 formed by the side folding line L12 and the outer edge 15B of the folding wall 15 is set small, and the side folding is performed. You may make small the protrusion amount of the lower end part of the curve L12.

  According to the trays 2 and 3 according to the modified examples described above, the above-described trays can be easily put in and out, and the trays 2 and 3 can be stably stacked with a simple structure. 1 can be obtained.

  In the trays 1 to 3 (hereinafter referred to as “tray 1 etc.”) according to the present embodiment (including each modification example, the same applies hereinafter), the end wall 11 has a double structure. For example, the end wall may be a single wall (not shown). In this case, the folded walls 13 to 15 are preferably held on the end wall by being bonded to the inner surface or the outer surface of the end wall (not shown). Moreover, in the tray 1 etc. which concern on this embodiment, although the side wall 12 was double structure, not only this but a side wall may be comprised with a single wall (not shown).

  Moreover, in the tray 1 etc. which concern on this embodiment, although a pair of laminated floor part 33 was contained in a pair of side wall 12, this invention is not limited to this. For example, one laminated floor portion may be included in only one of the pair of side walls 12 (not shown). In addition, the laminated floor portion 33 may be omitted from the side wall 12.

  Moreover, although the tray 1 according to the present embodiment is formed in a substantially rectangular parallelepiped shape, the walls are not limited to this, and each wall is designed to form another polyhedron (for example, a triangular prism shape, an octagonal column shape, or the like). (Not shown).

  In addition, the tray 1 according to the present embodiment is formed of a paper cardboard sheet, but is not limited thereto, and may be formed of cardboard, a resin plate (sheet), or the like.

  In addition, description of the said embodiment shows the one aspect | mode in the packaging box which concerns on this invention, Comprising: The technical scope of this invention is not limited to the said embodiment.

1, 2, 3 tray 10 bottom wall 11 end wall (first side wall)
12 side wall (second side wall)
13, 14, 15 Folding wall 20 First outer wall 22 First inner wall 30 Second outer wall 32 Second inner wall 35 Second cut portion (cut portion)
35A bump part L10, L11, L12 Side fold curve (fold curve)
L20 Reverse curve

Claims (7)

The bottom wall (10),
A first side wall (11) erected at an end of the bottom wall in the first direction;
A second side wall (12) erected at the end of the second direction intersecting the first direction of the bottom wall;
A folding wall (13 (14, 15)) connected to the end in the first direction of the second side wall via a folding line (L10 (L11, L12)),
Between the bottom wall and the second side wall, a notch (35) is cut inward from the end in the first direction,
The folded wall is in a posture inclined so as to separate from the bottom wall from the folding curve toward the tip in a state of being folded along the folding curve so as to overlap the first side wall,
In the process in which the folded wall is pressed against the bottom wall and held by the first side wall, the second side wall connects the abutting portion (35A) of the cut portion and the upper end portion of the folding curve. The tray is modified so that the lower end portion of the folding curve protrudes outward in the second direction with a line as a fulcrum. In a state where the bottom wall and the second side wall are flatly developed, the folding line (L10) is formed in a state inclined toward the first direction outer side from the notch part toward the second direction outer side,
The tray (1) according to claim 1, wherein an angle (θ2) formed between the folding line and the outer edge (13B) in the second direction of the folding wall (13) is set to an obtuse angle. In the state where the bottom wall and the second side wall are flatly developed, the folding wall (14) extends obliquely inward in the second direction from the folding line,
The tray according to claim 1, wherein an angle (θ2) formed by the folding line (L11) and an outer edge (14B) in the second direction of the folding wall is set to an obtuse angle. In the state where the bottom wall and the second side wall are flatly developed, the folding wall (15) extends obliquely outward in the second direction from the folding line,
The tray according to claim 1, wherein an angle (θ2) formed by the folding line (L12) and an outer edge (15B) in the second direction of the folding wall is set to an obtuse angle.   A reverse folding curve (L20) is formed in the second side wall so as to extend obliquely from the abutting portion of the cut portion to the upper end portion of the folding curve so as to fold the second side wall. The tray according to any one of claims 1 to 4, wherein: The first side wall is formed in a double structure facing the first outer wall (20) and the first inner wall (22),
The tray according to any one of claims 1 to 5, wherein the folding wall is sandwiched and held between the first outer wall and the first inner wall while being pressed against the bottom wall. . The second side wall is formed in a double structure facing the second outer wall (30) and the second inner wall (32),
The tray according to any one of claims 1 to 6, wherein the folding wall is connected to an end portion in the first direction of the second outer wall via the folding line.

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