JP7455734B2 - trays and blanks - Google Patents

Description

TECHNICAL FIELD The present invention relates to a tray and a blank that are provided with a partition structure that partitions a storage space that accommodates items to be packaged.

BACKGROUND ART A tray is known that is assembled by folding paperboard and accommodates a plurality of articles in an array (Patent Document 1). This tray includes a pair of crosspieces, a plurality of horizontal partition plates arranged in parallel between both crosspieces, a pair of first side plates connected to the side edges of both crosspieces, and both first side plates. It includes a pair of bottom plates connected to the lower edge, a pair of vertical partition plates connected to the tip edges of both bottom plates, and a pair of second side plates connected to the inner edges of both crosspieces. Ta. The first side plate is bent downward at right angles to the crosspiece, and when the first side plate is bent, the horizontal partition plate assumes a vertical position. The pair of bottom plates have their leading edges bent horizontally in a direction in which they abut each other. The vertical partition plate is bent upward at right angles to both bottom plates, and the fitting slits of the vertical partition plate and the horizontal partition plate fit into each other. The second side plate is bent downward at right angles to the crosspiece, and the assembled state is maintained by engaging the engagement projections of the vertical partition plate with the engagement holes of the second side plate.

Patent No. 4233286

However, with the above-mentioned tray, when a large load is applied to the bottom plate, such as when a heavy object is placed on the bottom plate, there is a risk that the engagement protrusion of the vertical partition plate may come off from the engagement hole of the second side plate. . If the engagement protrusion comes off from the engagement hole, there is a risk that the bottom plate will fall off, making it impossible to maintain the assembled state of the tray.

In order to solve the above problems, the present invention provides a tray and a blank that can be properly maintained in an assembled state.

The present invention provides a tray equipped with a partition structure that partitions a storage space for storing objects to be packaged, the tray comprising: a pair of crosspieces provided on both sides in a first direction with an opening that opens the storage space; , a pair of first side walls connected to outer ends of the pair of crosspieces in the first direction; and a pair of first side walls connected to both ends of the pair of crosspieces in the second direction orthogonal to the first direction. a pair of bottom walls connected to the tips of the pair of second side walls in the second direction; a pair of partition walls connected to the tips of the pair of bottom walls in the second direction; two pairs of support pieces connected to both ends of the bottom wall in the first direction, and the pair of first side walls and the pair of second side walls are arranged downwardly with respect to the pair of crosspieces. The pair of bottom walls are bent against the second side wall so that their tips abut each other, and are opposed to the crosspiece with the accommodation space in between, and the pair of partition walls are , each of the supporting pieces is bent upward relative to the bottom wall and overlapped within the accommodation space to form the partition structure, and each of the supporting pieces is bent upward relative to the bottom wall and forms an outer surface of the first side wall. The supporting pieces overlap each other, and the distal end portions of the respective support pieces are locked in locking holes formed in the crosspiece or the first side wall.

In this case, each of the first side walls is connected to a first outer wall that is bent downward with respect to the crosspiece, and a tip of the first outer wall in the first direction, and is bent upward with respect to the first outer wall. a first inner wall that is folded back and forms a double wall structure opposite to the inner surface of the first outer wall, each of the second side walls having a pair of folds connected to each other at both ends in the first direction; each folding piece is bent with respect to the second side wall and disposed between the first outer wall and the first inner wall, and each of the partition walls has two ends in the first direction. The first inner wall may have a pair of engagement protrusions protruding from each other, and each of the first inner walls may have an engagement portion with which the engagement protrusions of the partition wall forming the partition structure engage. .

In this case, the first inner wall is formed lower than the first outer wall, and the lower end of the engagement protrusion of the partition wall serving as the partition structure is the upper end of the first inner wall serving as the engagement portion. It may come into contact with.

In this case, each of the second side walls includes a second outer wall that is bent downward with respect to the pair of crosspieces, and a second outer wall that extends from the second outer wall toward the opening, and that extends from the second outer wall toward the opening. It may have a second inner wall that is folded back downward and forms a double wall structure opposite to the inner surface of the second outer wall.

In this case, at least one partition-side slit is cut in each of the partition walls from the distal end in the second direction toward the proximal end, and at least one auxiliary partition wall can be removed from the opening. At least one auxiliary side slit is cut in the auxiliary partition wall from one end toward the other end, and the auxiliary partition wall separated from the opening becomes the partition structure. The storage space may be partitioned by interlocking the auxiliary side slit with the partition side slit of the partition wall so as to cross the partition structure.

In this case, a pair of reinforcing bars extend from the pair of bars toward the opening, are folded back downward, and overlap the lower surfaces of the pair of bars, and a pair of reinforcing bars extend from the tips of the pair of reinforcing bars. The device may further include a pair of first reinforcing pieces that are bent downward relative to the pair of folded reinforcing beams and overlap the pair of first side walls.

The blank of the invention forms a tray as described in any of the above.

According to the present invention, the assembled state of the tray can be properly maintained.

FIG. 1 is a perspective view showing a tray according to a first embodiment of the present invention. FIG. 2 is a plan view showing a tray blank according to the first embodiment of the present invention. FIG. 3 is a perspective view showing a state in which the second outer wall of the tray according to the first embodiment of the present invention is bent downward. FIG. 3 is a perspective view showing a state in which a first side wall of the tray according to the first embodiment of the present invention is formed. It is a perspective view showing the process of forming the partition structure of the tray concerning a 1st embodiment of the present invention. It is a top view which shows the blank of the tray based on 2nd Embodiment of this invention. It is a perspective view showing a tray concerning a 2nd embodiment of the present invention. It is a top view which shows the blank of the tray based on 3rd Embodiment of this invention. FIG. 7 is a perspective view showing a tray according to a third embodiment of the present invention. It is a top view which shows the blank of the tray based on 4th Embodiment of this invention. It is a perspective view showing a tray concerning a 4th embodiment of the present invention. It is a sectional view showing the first side wall etc. of the tray concerning a 4th embodiment of the present invention.

Embodiments of the present invention will be described below with reference to the accompanying drawings. Note that Fr, Rr, L, R, U, and D shown in the drawings indicate front, rear, left, right, top, and bottom. The left-right direction (first direction), the front-back direction (second direction), and the up-down direction are orthogonal to each other. Although terms indicating directions and positions are used in this specification, these terms are used for convenience of explanation and do not limit the technical scope of the present invention. Further, terms indicating directions and positions are based on directions and positions when the tray is assembled and used.

[First embodiment]
A tray 1 according to a first embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view showing the tray 1. FIG. FIG. 2 is a plan view showing the blank 1A of the tray 1.

As shown in FIG. 1, the tray 1 is formed into a substantially rectangular parallelepiped shape as a whole, and includes a partition structure 8 that partitions a storage space S for storing items to be packaged (not shown).

The tray 1 is formed by assembling blanks 1A shown in FIG. The blank 1A is formed by punching out a single corrugated paper sheet using a cutting die or the like. The corrugated board sheet is, for example, a double-sided corrugated board sheet in which a front liner 9B and a back liner 9C (see FIG. 1) are bonded to a corrugated medium 9A. Note that FIG. 2 shows the front liner 9B side. In this specification, a direction parallel to the corrugated cardboard sheet 9A will be referred to as a "corrugated direction", and a direction perpendicular to the corrugated direction will be referred to as a "flow direction". "X" shown in the drawings indicates the "stage direction" and "Y" indicates the "flow direction".

[blank]
As shown in FIG. 2, the blank 1A includes a pair of crosspieces 10, a pair of first side walls 11, a pair of second side walls 12, a pair of bottom walls 13, a pair of partition walls 14, and two pairs of partition walls 14. A support piece 15 is provided. Note that in FIG. 2, the pair of crosspieces 10 and the pair of first side walls 11 are formed symmetrically, so in the following description, one portion will be described unless otherwise specified. Similarly, in FIG. 2, the pair of second side walls 12, the pair of bottom walls 13, and the pair of partition walls 14 are vertically symmetrical, so in the following description, unless otherwise specified, One part will be explained except for. Furthermore, in FIG. 2, the two pairs of support pieces 15 are formed symmetrically in the vertical and horizontal directions with respect to the centroid of the blank 1A. 15 will be explained.

<Beam section>
The crosspiece 10 is formed in a substantially rectangular shape that is long in the flow direction (second direction). To be precise, both sides of the crosspiece 10 in the flow direction are provided in a substantially trapezoidal shape to protrude inward in the step direction from the middle part of the crosspiece 10 in the flow direction. The pair of crosspieces 10 are provided on both sides in the step direction (first direction) with an opening H that opens the accommodation space S interposed therebetween. A connecting portion 10A is constructed between a pair of crosspieces 10 spaced apart in the step direction. The connecting portion 10A is arranged at the center of the opening H in the flow direction, and divides the opening H into two equal parts. The crosspiece 10 and the connecting portion 10A constitute a top surface that partially closes the opening H when the tray 1 is formed (see FIG. 1).

<First side wall>
The pair of first side walls 11 are connected to the outer ends of the pair of crosspieces 10 in the step direction (first direction). The first side wall 11 has a generally rectangular shape as a whole. The first side wall 11 has 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 outer end of the crosspiece 10 in the step direction via the first folding line L1. A locking hole 18 is formed in the first outer wall 20 along the boundary with the crosspiece 10. The locking hole 18 is formed by making a cut in the center of the first outer wall 20 in the flow direction. Specifically, the locking hole 18 is continuous with a concave cut 18A cut on an extension line of the first fold line L1, and on both sides of the concave cut 18A in the flow direction, and is slightly disposed on the distal end side of the first outer wall 20. It has a pair of protruding convex cuts 18B. The height of the convex cut 18B (the amount of protrusion from the first folding line L1) is set to approximately the thickness of the corrugated cardboard sheet.

(First frame part)
The first frame portion 21 is connected to the tip of the first inner wall 22 in the step direction via the second folding line L2. The dimension (extension dimension) of the first frame portion 21 in the corrugated direction is set to be slightly longer than the thickness of the corrugated cardboard sheet.

(First inner wall)
The first inner wall 22 is connected to the tip of the first frame portion 21 in the step direction via the second folding line L2. In other words, the first inner wall 22 is connected to the tip (lower end) of the first outer wall 20 in the step direction via the first frame portion 21 . The dimension (height) of the first inner wall 22 in the step direction is approximately the same as the height of the first outer wall 20. A pair of pressing protrusions 23 are provided protruding from both ends of the first inner wall 22 in the flow direction. An engaging groove 24 (engaging portion) is recessed in the center of the first inner wall 22 in the flow direction from the tip (lower end) in the step direction to about half the height of the first inner wall 22 . Further, a pair of inner wall recesses 25 are provided at the tip of the first inner wall 22 so as to be continuous with both sides of the engagement groove 24 in the flow direction. The dimensions in the flow direction of the pair of inner wall recesses 25 are set to be approximately the same as the dimensions in the flow direction of the pair of convex cuts 18B (locking holes 18), and the height (indentation amount) of each inner wall recess 25 is set to It is set to about the thickness of

<Second side wall>
The pair of second side walls 12 are connected to both ends of the pair of crosspieces 10 in the flow direction. The second side wall 12 has a second outer wall 30, a second frame portion 31, a second inner wall 32, and a pair of folding pieces 33.

(Second outer wall, second frame part)
The second outer wall 30 is connected to the ends of the pair of crosspieces 10 in the flow direction via the third folding line L3. The second outer wall 30 is formed in a substantially rectangular shape. The dimension (height) of the second outer wall 30 in the flow direction is approximately the same as the height of the first outer wall 20. The second frame portion 31 is connected to the end of the second inner wall 32 on the opening H side via the fourth folding line L4. The dimension (extension dimension) of the second frame portion 31 in the flow direction is set to be slightly longer than the thickness of the corrugated cardboard sheet.

(Second inner wall)
The second inner wall 32 is connected to the tip of the second frame portion 31 in the flow direction via the fourth folding line L4. In other words, the second inner wall 32 is connected to the upper end of the second outer wall 30 via the second frame portion 31. In other words, the second inner wall 32 (second frame portion 31) extends from the second outer wall 30 toward the opening H. The second inner wall 32 extends to the vicinity of the center in the flow direction of the opening H divided into two by the connecting portion 10A. The height of the second inner wall 32 is approximately the same as the height of the second outer wall 30. The second inner wall 32 is arranged between the pair of crosspieces 10, and both ends of the second inner wall 32 in the step direction are butted against the inner ends of the pair of crosspieces 10. The second inner wall 32 is formed wider on the distal end side in the step direction than on the proximal end side. A pair of fixed protrusions 34 are provided at the tip of the second inner wall 32 in a protruding manner.

(Insert piece)
The pair of folding pieces 33 are connected to both ends of the second outer wall 30 in the step direction via the fifth folding line L5. The folding piece 33 is formed into a substantially rectangular shape, and its tip substantially coincides with the tip of the first side wall 11 (first inner wall 22). A recessed portion 35 is provided on the first inner wall 22 side (lower end portion) on the distal end side of the folding piece 33 . The dimension of the single recessed portion 35 in the step direction is set to be approximately the same as the dimension of one convex cut 18B in the flow direction, and the height (indentation amount) of the single recessed portion 35 is set to be approximately the thickness of the corrugated board sheet.

<Bottom wall>
The pair of bottom walls 13 are connected to the ends of the pair of second side walls 12 in the flow direction via the sixth fold line L6. The bottom wall 13 is formed into a substantially rectangular shape. The dimension of the bottom wall 13 in the flow direction is set to about half the dimension of the crosspiece 10 in the flow direction. A pair of fixing holes 36 are opened in the bottom wall 13 along the sixth folding line L6. Each fixing hole 36 and each fixing convex portion 34 of the second inner wall 32 are arranged on the same straight line in the flow direction.

<Partition wall>
The pair of partition walls 14 are connected to the ends of the pair of bottom walls 13 in the flow direction via the seventh fold line L7. The partition wall 14 is formed in a substantially rectangular shape that is shorter than the bottom wall 13 in the step direction. The dimension (height) of the partition wall 14 in the flow direction is approximately the same as the height of the second outer wall 30. A pair of engaging protrusions 26 are provided protruding from both ends of the partition wall 14 in the flow direction on the distal end side. Further, each engagement protrusion 26 is recessed one step further than the tip of the partition wall 14 in the flow direction, and the tip corner of each engagement protrusion 26 is cornered into an arc shape. A pair of partition recesses 27 are provided on both sides of the partition wall 14 in the step direction. The height (indentation amount) of each partition recess 27 is set to approximately the thickness of the corrugated cardboard sheet.

<Support piece>
The two pairs of support pieces 15 are connected to the tip side in the flow direction at both ends of the pair of bottom walls 13 in the step direction. Specifically, the support piece 15 is connected to the support body portion 16 that is connected to the bottom wall 13 via the eighth fold line L8, and to the tip of the support body portion 16 in the step direction via the ninth fold line L9. It has a distal end locking piece 17 provided therein. The support main body portion 16 is formed into a substantially trapezoidal shape having a side extending parallel to the seventh folding line L7 and a side sloped away from the folding piece 33 toward the tip in the step direction. That is, the support main body portion 16 is formed into a substantially trapezoidal shape whose width gradually becomes narrower toward the tip in the step direction. The tip locking piece 17 is also formed into a substantially trapezoidal shape having a side extending parallel to the seventh folding line L7 and a side inclined away from the folding piece 33 toward the tip in the step direction. A bent portion 17A is provided on the inclined side of the proximal end of the tip locking piece 17 in a protruding manner. A substantially L-shaped cut is formed on the outside of the support piece 15 in the flow direction along the ninth folding line L9.

Note that the first folding line L1 and the third to ninth folding lines L3 to L9 are general-purpose ruled lines formed by recessing the corrugated cardboard sheet from the back liner 9C. The second folding line L2 is a lead ruled line in which perforations are made on a general ruled line. The general-purpose ruled lines and lead ruled lines have the function of folding (normally folding) the corrugated cardboard sheet so that the back liner 9C faces inward. Note that the first to ninth folding lines L1 to L9 are not limited to general-purpose ruled lines or lead ruled lines, but may be of any structure as long as they can bend the corrugated cardboard sheet in a desired direction.

[Assembling the tray]
Next, the assembly work of the tray 1 will be explained with reference to FIGS. 1, 3 to 5. FIG. 3 is a perspective view showing a state in which the second outer wall 30 is bent downward. FIG. 4 is a perspective view showing a state in which the first side wall 11 is formed. FIG. 5 is a perspective view showing the process of forming the partition structure 8. As shown in FIG. In addition, regarding a pair or two pairs of parts, the explanation will be continued by focusing on one part.

The operator assembles the tray 1 by appropriately folding the blank 1A with the back liner 9C facing upward.

As shown in FIG. 3, the worker bends the second outer wall 30 downward along the third folding line L3 (and fourth folding line L4) with respect to the crosspiece 10 (and the second frame part 31), The folding piece 33 is folded inward against the second outer wall 30 along the fifth folding line L5. Next, as shown in FIG. 4, the worker bends the first outer wall 20 downward with respect to the crosspiece 10 along the first folding line L1, and bends the first frame part 21 along the second folding line L2. Then, the first inner wall 22 is bent upward along the second folding line L2. The first inner wall 22 is folded upward with respect to the first outer wall 20, and has a double wall structure (including the folded piece 33) facing the inner surface (back liner 9C) of the first outer wall 20 with the folded piece 33 in between. triple wall structure). The pair of pressure contact protrusions 23 of the first inner wall 22 are pressed against the inner surfaces (back liner 9C) of the pair of second outer walls 30 (see FIG. 1). The first inner wall 22 is press-fitted between the pair of second outer walls 30 and held in a folded state. The folding piece 33 is arranged between the first outer wall 20 and the first inner wall 22.

Further, as shown in FIG. 5, when the first outer wall 20 is bent, the locking hole 18 opens along the upper end of the first outer wall 20 (first folding line L1). Specifically, the pair of convex cuts 18B form a wide gap, and the concave cuts 18A form a narrow gap. In other words, the locking hole 18 includes two wide gaps that are simply separated by a narrow gap. Note that the portions of the pair of convex cuts 18B protrude slightly horizontally from the crosspiece 10, and the portions of the concave cuts 18A are relatively recessed. Further, the piece recess 35 of the folding piece 33 and the inner wall recess 25 of the first inner wall 22 are arranged at a position corresponding to the locking hole 18 (wide gap).

Next, as shown in FIG. Fold it upward along folding line L7. The pair of bottom walls 13 are bent against the second outer wall 30 so that their tips abut each other, and the pair of partition walls 14 enter the storage space S while overlapping the back liners 9C.

The pair of engagement projections 26 of the partition wall 14 move while being pressed against the first inner wall 22 and fit into the engagement groove 24 (see FIG. 1). As shown in FIG. 1, the pair of bottom walls 13 are substantially parallel to the crosspiece 10 and face the crosspiece 10 with the accommodation space S interposed therebetween. The pair of partition walls 14 overlap inside the accommodation space S to form the partition structure 8. The partition structure 8 assumes an upright position and divides (partitions) the accommodation space S into two in the front-rear direction. Further, the upper end (tip) of the partition wall 14 that has become the partition structure 8 comes into contact with the lower surface (back liner 9C) of each crosspiece 10 and the connecting part 10A, and the partition recess 27 of the partition wall 14 is It is arranged at a position corresponding to the hole 18.

Next, the operator bends the support main body part 16 upward against the bottom wall 13 along the eighth folding line L8, and bends the tip locking piece 17 against the support main body part 16 along the ninth folding line L9. and fold it inward. The operator further bends the support body portion 16 while inserting the tip locking piece 17 into the locking hole 18 (wide gap) formed in the first outer wall 20. The pair of front and rear support pieces 15 are in a butted state, each support body 16 overlaps the outer surface (front liner 9B) of the first outer wall 20, and each tip locking piece 17 is formed on the first outer wall 20. It is locked in the locking hole 18 (see FIG. 1). Note that since the return portion 17A of the tip locking piece 17 is caught on the edge of the locking hole 18, the tip locking piece 17 cannot be easily pulled out. Furthermore, since the piece recess 35 of the folding piece 33, the inner wall recess 25 of the first inner wall 22, and the partition recess 27 of the partition wall 14 are located at positions corresponding to the locking hole 18, the tip inserted into the locking hole 18 can be locked. The piece 17 does not interfere with the folding piece 33, the first inner wall 22, and the partition wall 14. Further, when the tip locking piece 17 is bent, a substantially L-shaped notch portion protrudes slightly from the support body portion 16, and this protruding portion fits into the concave cut 18A.

Next, the operator bends the second inner wall 32 downward along the fourth folding line L4. The second inner wall 32 is folded downward relative to the second outer wall 30 (more precisely, the second frame portion 31), and forms a double wall structure by opposing the inner surface (back liner 9C) of the second outer wall 30. (See Figure 1). Furthermore, the pair of fixing protrusions 34 of the second inner wall 32 fit into the pair of fixing holes 36 of the bottom wall 13 (see FIG. 1), and the second inner wall 32 is held in the folded state. As a result, the opening H divided into two by the connecting portion 10A is fully opened. Note that the bending work of the second inner wall 32 may be performed before the work of locking the support piece 15 (tip locking piece 17) into the locking hole 18.

Through the above steps, assembly of the tray 1 is completed (see FIG. 1). The worker stores the items to be packaged in the storage space S partitioned off by the partition structure 8.

In the tray 1 according to the first embodiment described above, the support piece 15 extending upward from the bottom wall 13 overlaps the outer surface of the first side wall 11, and the tip of the support piece 15 (the tip locking piece 17) It was configured to be locked in a locking hole 18 formed in the first side wall 11 (boundary between the crosspiece 10 and the first side wall 11). According to this configuration, each support piece 15 is installed between the bottom wall 13 and the upper end of the first side wall 11, and the bottom wall 13 is suspended from the first side wall 11 via the pair of left and right support pieces 15. It can be put in a Thereby, even when a large load is applied to the bottom wall 13, the bottom wall 13 can be prevented from falling off or loosening, and the assembled state of the tray 1 can be maintained properly. Further, by laminating the supporting pieces 15 on the outer surface of the first side wall 11, the first side wall 11 can be reinforced. Thereby, the compressive strength of the first side wall 11 can be improved, and a plurality of trays 1 can be stacked. Furthermore, the partition structure 8 serving as a partition can also be used as a member for improving the compressive strength of the tray 1. Thereby, when a plurality of trays 1 are stacked, the objects to be packaged accommodated in the trays 1 can be appropriately protected.

Further, according to the tray 1 according to the first embodiment, the first side wall 11 and the second side wall 12 can have a double wall structure, so that the compressive strength of the first side wall 11 and the second side wall 12 can be reduced. It can be further improved.

Further, according to the tray 1 according to the first embodiment, the engagement protrusion 26 of the partition wall 14, which is the partition structure 8, fits into the engagement groove 24 of the first inner wall 22 (engages with the engagement portion). Therefore, the partition wall 14 (partition structure 8) can be maintained in the upright position in the accommodation space S.

Further, according to the tray 1 according to the first embodiment, when manufacturing the blank 1A, the part that becomes the opening H is usually punched out and discarded, but the second inner wall 32 is extended toward the opening H. This allows a portion that is normally discarded to be effectively used as the second inner wall 32.

In addition, in the tray 1 according to the first embodiment, one connecting portion 10A is installed between the pair of crosspieces 10, but the connecting portion 10A may be omitted, or two or more connecting portions 10A are installed. may be provided (not shown).

[Second embodiment]
Next, the tray 2 (blank 2A) according to the second embodiment will be described with reference to FIGS. 6 and 7. FIG. 6 is a plan view showing the blank 2A of the tray 2. FIG. 7 is a perspective view showing the tray 2. FIG. In the following description, the same reference numerals are given to the same or corresponding configurations as those of the tray 1 according to the first embodiment, and the explanations that are the same or corresponding to the tray 1 are omitted.

In the tray 1 according to the first embodiment, the first inner wall 22 of the first side wall 11 was approximately the same height as the first outer wall 20, but in the tray 2 according to the second embodiment, the first inner wall 40 was It is formed lower than the first outer wall 20 (see FIG. 7). The height (dimension in the step direction) of the first inner wall 40 is approximately the same as the height (h) from the seventh folding line L7 to the lower end of the engagement protrusion 26 of the partition wall 14 (see FIG. 6). Note that in the tray 2 (blank 2A) according to the second embodiment, the engagement groove 24 and the pair of inner wall recesses 25 are omitted. Further, like the first inner wall 40, the extension dimension of the folding piece 33 is also shortened. Further, as shown in FIG. 6, a stepped portion 41 is recessed in the second outer wall 30 at the boundary with the folding piece 33 (fifth folding line L5). When the first inner wall 40 is folded back against the first outer wall 20, the pressure contact protrusion 23 of the first inner wall 40 fits into the stepped portion 41.

[Assembling the tray]
The procedure for assembling the tray 2 according to the second embodiment is similar to the procedure for assembling the tray 1 according to the first embodiment. When the worker bends the pair of bottom walls 13 against the second outer wall 30 and enters the storage space S while overlapping the pair of partition walls 14, the pair of engagement protrusions 26 of the partition walls 14 engage with the first It moves to the space above the first inner wall 40 while being pressed against the inner wall 40 . As shown in FIG. 7, the lower end of the engagement protrusion 26 of the partition wall 14, which has become the partition structure 8, abuts (hangs) on the upper end of the first inner wall 40, which is an engagement part. This prevents the partition wall 14 (partition structure 8) from falling off. Note that the pair of front and rear folding pieces 33 are sandwiched between the first outer wall 20 and the first inner wall 40, but since the engaging protrusion 26 enters between the front and rear pair of folding pieces 33, it does not interfere with the folding pieces 33. do not.

According to the tray 2 (blank 2A) according to the second embodiment described above, since the first inner wall 40 is formed lower than the first outer wall 20, the first inner wall 40 is at approximately the same height as the first outer wall 20. The area used for the corrugated paperboard sheet can be reduced compared to the case where the paperboard sheet is used vertically. Thereby, the manufacturing cost of the tray 2 (blank 2A) can be reduced. Further, since the lower end of the engagement protrusion 26 of the partition wall 14 is caught on the upper end of the first inner wall 40, the bottom wall 13 is suspended from the first inner wall 40 via the partition wall 14 (partition structure 8). be able to. Thereby, falling off or loosening of the bottom wall 13 can be effectively suppressed.

[Third embodiment]
Next, the tray 3 (blank 3A) according to the third embodiment will be described with reference to FIGS. 8 and 9. FIG. 8 is a plan view showing a part of the blank 3A of the tray 3. FIG. 9 is a perspective view showing the tray 3. In addition, in the following description, the same reference numerals are given to the same or corresponding configurations as the tray 1 according to the first embodiment, and the descriptions the same or corresponding to the tray 1 are omitted.

In the tray 1 according to the first embodiment, only the partition structure 8 that partitions the storage space S into two in the front and back direction was provided, but in the tray 3 according to the third embodiment, in addition to the partition structure 8, An auxiliary partition wall 50 is provided to partition the accommodation space S into three parts in the left and right direction (see FIG. 9).

As shown in FIG. 8, in the blank 3A of the tray 3, the connecting portion 10A installed between the pair of crosspieces 10 is omitted, and two auxiliary partition walls 50 are removably arranged in the opening H. ing. Each auxiliary partition wall 50 is formed into a generally square shape. The two auxiliary partition walls 50 are arranged adjacent to the pair of crosspieces 10, and a part of the opening H is opened between the two auxiliary partition walls 50.

Each auxiliary partition wall 50 has a pair of auxiliary pieces 51 that are connected via a folding line L10. The length (height) of each auxiliary piece 51 in the step direction is set slightly higher than the partition wall 14. One auxiliary side slit 52 is cut in the center of the auxiliary piece 51 (auxiliary partition wall 50) in the flow direction from the outer end (one end) in the step direction toward the folding line L10 (the other end). The auxiliary side slit 52 is recessed from the outer end (lower end) of the auxiliary piece 51 in the step direction to about half the height of the auxiliary piece 51 . The open side (lower end) of the auxiliary side slit 52 is cut diagonally. Note that the folding line L10 is a half-cut line made by making a cut in about half the thickness of the corrugated cardboard sheet from the front liner 9B side, and has the function of folding back one auxiliary piece 51 so as to overlap the other auxiliary piece 51. There is. The folding line L10 is not limited to a half-cut line, and may have any structure as long as it has a function of folding back the auxiliary piece 51.

Furthermore, two partition-side slits 53 are cut into each partition wall 14 from the tip toward the base end in the flow direction (second direction). The partition-side slits 53 are formed near the center in the tier direction at intervals in the tier direction. Further, each partition-side slit 53 is recessed from the tip (upper end) of the partition wall 14 in the flow direction to about half the height of the partition wall 14 . The open side (lower end) of the partition-side slit 53 is cut diagonally.

[Assembling the tray]
The tray 3 according to the third embodiment is assembled in the same procedure as the tray 1 according to the first embodiment after the two auxiliary partition walls 50 are separated from the opening H (separated from the blank 3A). . The operator folds the auxiliary partition wall 50 removed from the opening H into two along the folding line L10 (folds back so that the back liners 9C of the pair of auxiliary pieces 51 are in contact with each other). After erecting the partition structure 8 in the storage space S, the operator inserts the auxiliary side slit 52 of the auxiliary partition wall 50 folded into two into the partition side slit 53 of the partition wall 14 which has become the partition structure 8. match. The two auxiliary partition walls 50 are oriented to intersect (approximately perpendicular to) the partition structure 8 and partition the accommodation space S into three in the left-right direction. Note that both front and rear ends of the auxiliary partition wall 50 are separated from the second side wall 12 (second inner wall 32), and the auxiliary partition wall 50 simply partitions the accommodation space S (not completely partitions it).

According to the tray 3 according to the third embodiment described above, by arranging the auxiliary partition wall 50 so as to intersect with the partition structure 8, the storage space S partitioned in the front and back direction can be expanded in the left and right direction. Can be divided. Thereby, the storage space S can be partitioned to accommodate various items to be packaged. Further, the portion that becomes the opening H, which is normally discarded when manufacturing the blank 3A, can be effectively used as the auxiliary partition wall 50.

Although the tray 3 according to the third embodiment is provided with two auxiliary partition walls 50 (two partition-side slits 53), the present invention is not limited thereto. At least one auxiliary partition wall 50 (partition-side slit 53) may be provided (not shown). Alternatively, three or more partition-side slits 53 may be formed so that the attachment position of the auxiliary partition wall 50 to the partition structure 8 can be freely changed (not shown). Moreover, although one auxiliary side slit 52 was cut into the auxiliary partition wall 50, the present invention is not limited to this. At least one auxiliary side slit 52 may be cut into the auxiliary partition wall 50. For example, a plurality of auxiliary side slits 52 may be cut into the auxiliary partition wall 50, and the auxiliary partition wall 50 may be erected at a position offset in the front-back direction with respect to the partition structure 8 (not shown).

Further, in the tray 3 according to the third embodiment, the auxiliary partition wall 50 has a double wall structure by folding back the pair of auxiliary pieces 51, but the present invention is not limited to this. For example, the auxiliary partition wall may be formed of only one auxiliary piece 51 (not shown). Further, although the pair of auxiliary pieces 51 are connected via the folding line L10 extending in the flow direction, the present invention is not limited to this, and they may be connected via the folding line L10 extending in the column direction. (not shown). Further, although the auxiliary side slit 52 was cut from both outer sides of the pair of auxiliary pieces 51, the invention is not limited to this, and the auxiliary side slit 52 may be cut near the center of the pair of auxiliary pieces 51 so as to cross the folding line L10. (not shown).

Further, in the tray 3 according to the third embodiment, the auxiliary partition wall 50 is formed slightly higher than the partition wall 14, but is not limited to this, and may be formed at the same height as the partition wall 14. death,
It may be formed lower than the partition wall 14 (not shown).

[Fourth embodiment]
Next, the tray 4 (blank 4A) according to the fourth embodiment will be described with reference to FIGS. 10 to 12. FIG. 10 is a plan view showing a part of the blank 4A of the tray 4. FIG. 11 is a perspective view showing the tray 4. FIG. 12 is a sectional view showing the first side wall 11 and the like. In addition, in the following description, the same reference numerals are given to the same or corresponding configurations as the tray 1 according to the first embodiment, and the descriptions the same or corresponding to the tray 1 are omitted.

The tray 4 according to the fourth embodiment has a structure in which the crosspiece 10 and the first side wall 11 are reinforced. As shown in FIG. 10, the blank 4A of the tray 4 includes a pair of reinforcing bars 60 extending from the pair of bars 10 toward the opening H, and a pair of reinforcing bars 60 extending from the tips of the pair of reinforcing bars 60. A pair of first reinforcing pieces 70 are provided. In the blank 4A, the connecting portion 10A installed between the pair of crosspieces 10 is omitted. In addition, in FIG. 10, the pair of reinforcing crosspieces 60 and the pair of first reinforcing pieces 70 are formed symmetrically, so in the following description, unless otherwise specified, one part will be described. .

<Reinforcement section>
The pair of reinforcing beams 60 are connected to the inner ends of the beams 10 via folded portions 62. The reinforcing bar portion 60 has a substantially rectangular outer shape. A substantially trapezoidal relief hole 61 whose width becomes narrower from the first reinforcing piece 70 toward the crosspiece 10 is bored in the reinforcing crosspiece 60 . The folded portion 62 is formed by arranging three first cuts 63 and two frame portions 64 alternately in the step direction. Each first cut 63 is obtained by cutting the corrugated cardboard sheet along the flow direction. A second cut 65 is cut in the boundary between each first cut 63 and each frame portion 64 along the step direction. Each frame portion 64 has a pair of frame lines 66 (for example, general-purpose ruled lines) formed substantially parallel to each other.

<First reinforcing piece>
The first reinforcing piece 70 is connected to the tip of the reinforcing bar 60 via the reverse fold line L11. The first reinforcing piece 70 is formed in a substantially rectangular shape, and a part of the relief hole 61 is formed in the first reinforcing piece 70 to cross the reverse fold line L11. Note that a portion of the opening H is open between the tips of the pair of first reinforcing pieces 70. Further, the reverse folding line L11 is a reverse ruled line that is formed by recessing the corrugated cardboard sheet from the front liner 9B, and has a function of folding (reverse folding) the corrugated cardboard sheet so that the front liner 9B faces inward. Note that the reverse folding line L11 is not limited to a reverse ruled line, and may be any other structure as long as it can bend the corrugated cardboard sheet in a desired direction.

[Assembling the tray]
First, as shown in FIGS. 11 and 12, the worker folds the reinforcing bar 60 downward along the folding part 62 (frame line 66) with respect to the reinforcing bar 60, and 1. Fold the reinforcing piece 70 downward along the reverse fold line L11. Further, the worker bends the first outer wall 20 downward with respect to the crosspiece 10. The reinforcing crosspiece 60 is folded back downward and overlaps the lower surface (back liner 9C) of the pair of crosspieces 10, and the first reinforcing piece 70 overlaps the inner surface (back liner 9C) of the first outer wall 20. Thereafter, the operator performs the same work as the assembly work of the tray 1 according to the first embodiment to assemble the tray 4 (see FIG. 11). As shown in FIG. 12, the folding piece 33 overlaps the inner surface (front liner 9B) of the first reinforcing piece 70, and folds the first inner wall 22 upward to separate the first reinforcing piece 70 and the first inner wall 22. caught between. Thereby, the reinforcing crosspiece 60 can be maintained in a stacked state on the crosspiece 10. Further, the first reinforcing piece 70 and the folding piece 33 are sandwiched between the first outer wall 20 and the first inner wall 22, and a part of the first side wall 11 has a quadruple wall structure. Note that the escape hole 61 of the reinforcing beam 60 is arranged at a position corresponding to the locking hole 18. The tip locking piece 17 inserted into the locking hole 18 enters the escape hole 61, so it does not interfere with the reinforcing beam 60.

According to the tray 4 according to the fourth embodiment described above, the crosspiece 10 can be reinforced by stacking the reinforcing crosspiece 60 on the crosspiece 10, and the first reinforcing piece 70 can be overlapped with the first inner wall 22. The first side wall 11 can be reinforced with this. Thereby, the rigidity (strength) of the portion extending from the crosspiece 10 to the first side wall 11 can be improved, and deformation of the tray 4 during transportation can be suppressed. As a result, the items to be packaged accommodated in the tray 4 can be properly protected. Further, the portion that becomes the opening H, which is normally discarded when manufacturing the blank 4A, can be effectively used as the reinforcing bar portion 60 and the first reinforcing piece 70.

In addition, in the assembly work of the tray 4 described above, the reinforcing crosspiece 60 and the first reinforcing piece 70 were bent before folding the second outer wall 30 and the folding piece 33; After that, the reinforcing piece 60 and the first reinforcing piece 70 may be bent and the first reinforcing piece 70 may be stacked on the inside of the folded piece 33.

Note that in the trays 1 to 4 according to the first to fourth embodiments, the locking hole 18 was formed at the upper end of the first outer wall 20 (near the boundary with the crosspiece 10); but not limited to. For example, the locking hole 18 may be formed in the vertically intermediate portion of the first outer wall 20 (not shown). In this case, the length of the support piece 15 (support main body part 16) is adjusted according to the position of the locking hole 18. Further, for example, the locking hole 18 may be formed in the crosspiece 10 (not shown). In this case, the support body portion 16 is formed so as to overlap from the first outer wall 20 to the crosspiece portion 10 .

Further, in the trays 1 to 4 according to the first to fourth embodiments, the locking holes 18 are formed in a slit shape, but the locking holes 18 are not limited to this, and for example, the locking holes 18 can be formed by the operator with a finger. The opening may be large enough to allow the tip locking piece 17 to be pushed in (not shown).

Further, in the trays 1 to 4 according to the first to fourth embodiments, the partition wall 14 was formed at approximately the same height as the first and second side walls 11 and 12, but the present invention is not limited to this. . The partition wall 14 may be formed lower than the first and second side walls 11 and 12, or may be formed higher than the first and second side walls 11 and 12 (not shown). When the partition wall 14 is made higher than the first and second side walls 11 and 12, the connecting portion 10A is omitted. Furthermore, a handle hole or the like for a user to grasp during transportation may be formed in the partition wall 14 (not shown).

Further, in the trays 1 to 4 according to the first to fourth embodiments, the first side wall 11 has a double wall structure, but the first side wall 11 is not limited to this, for example, the first side wall 11 is composed of only the first outer wall 20. (not shown). In this case, the engagement groove 24 and the inner wall recess 25 are formed in the first outer wall 20. Similarly, the second side wall 12 is not limited to a double wall structure, and may be composed only of the second outer wall 30 (not shown). When the first side wall 11 and the second side wall 12 have a single wall structure, the folding pieces 33 may be continuously provided at both ends of the first side wall 11 (first outer wall 20). In this case, the folding piece 33 is preferably adhered to the inner surface (or outer surface) of the first side wall 11 or the inner surface (or outer surface) of the second side wall 12 (not shown).

Further, in the trays 1 to 4 according to the first to fourth embodiments, the first inner wall 22 was connected to the first outer wall 20 via the first frame part 21, but the first frame part 21 was omitted. However, it may be directly connected to the first outer wall 20 (not shown). Similarly, the second frame portion 31 may be omitted and the second inner wall 32 may be directly connected to the second outer wall 30 (not shown).

In addition, although the trays 1 to 4 (blanks 1A to 4A) according to the first to fourth embodiments are formed of double-sided corrugated paper sheets made of paper, they are not limited to this, but include single-sided corrugated sheets, double-sided corrugated sheets, Alternatively, it may be formed of cardboard, a resin plate (sheet), or the like. Further, the dimensions (width, depth, height) and shape of each part of the trays 1 to 4, the thickness of the corrugated cardboard sheet, the direction in which the corrugated cardboard 9A extends, etc. may be freely changed.

Note that the description of the above embodiments shows one aspect of the tray and blank according to the present invention, and the technical scope of the present invention is not limited to the above embodiments. The technical scope of the present invention is not limited to the above embodiments. The present invention may be variously changed, replaced, and modified without departing from the spirit of the technical idea, and the scope of the claims includes all embodiments that can be included within the scope of the technical idea.

1, 2, 3, 4 Tray 1A, 2A, 3A, 4A Blank 8 Partition structure 10 Crosspiece 11 First side wall 12 Second side wall 13 Bottom wall 14 Partition wall 15 Support piece 18 Locking hole 20 First outer wall 22 No. 1 Inner wall 24 Engagement groove (engagement part)
26 Engagement protrusion 30 Second outer wall 32 Second inner wall 33 Folding piece 50 Auxiliary partition wall 52 Auxiliary side slit 53 Partition side slit 60 Reinforcement crosspiece 70 First reinforcement piece H Opening S Accommodation space

Claims (7)

A tray (1 to 4) comprising a partition structure (8) that partitions a storage space (S) for storing an object to be packaged,
a pair of crosspieces (10) provided on both sides in the first direction with an opening (H) that opens the accommodation space;
a pair of first side walls (11) connected to outer ends of the pair of crosspieces in the first direction;
a pair of second side walls (12) connected to both ends of the pair of crosspieces in a second direction perpendicular to the first direction;
a pair of bottom walls (13) connected to the tips in the second direction of the pair of second side walls;
a pair of partition walls (14) connected to the tips of the pair of bottom walls in the second direction;
two pairs of support pieces (15) connected to both ends of the pair of bottom walls in the first direction;
The pair of first side walls and the pair of second side walls are bent downward relative to the pair of crosspieces,
The pair of bottom walls are bent with respect to the second side wall so that their tips abut each other, and are opposed to the crosspiece with the accommodation space interposed therebetween;
The pair of partition walls are bent upward with respect to the bottom wall and overlap inside the accommodation space to form the partition structure,
Each of the support pieces is bent upward with respect to the bottom wall and overlaps the outer surface of the first side wall, and a tip end of each of the support pieces is connected to a locking hole formed in the crosspiece or the first side wall. (18) A tray characterized by being latched to. Each of the first side walls is
a first outer wall (20) that is bent downward with respect to the crosspiece;
A first inner wall (22, 40) and,
Each of the second side walls has a pair of folding pieces (33) connected to both ends in the first direction,
Each of the folding pieces is bent with respect to the second side wall and arranged between the first outer wall and the first inner wall,
Each of the partition walls has a pair of engagement protrusions (26) protruding from both ends in the first direction,
2. Each of the first inner walls has an engaging portion (24, 40) with which the engaging protrusion of the partition wall serving as the partition structure engages. tray. The first inner wall (40) is formed lower than the first outer wall,
3. The tray according to claim 2, wherein a lower end of the engaging protrusion of the partition wall serving as the partition structure comes into contact with an upper end of the first inner wall serving as the engaging portion. Each of the second side walls is
a second outer wall (30) that is bent downward with respect to the pair of crosspieces;
a second inner wall (32) extending from the second outer wall toward the opening, folded back downward with respect to the second outer wall, and forming a double wall structure by opposing the inner surface of the second outer wall; 4. The tray according to claim 1, comprising: and. At least one partition-side slit (53) is cut in each of the partition walls from the distal end toward the proximal end in the second direction,
At least one auxiliary partition wall (50) is removably disposed in the opening,
At least one auxiliary side slit (52) is cut into the auxiliary partition wall from one end to the other end,
The auxiliary partition wall that has been separated from the opening has a posture that intersects with the partition structure by engaging the auxiliary slit with the partition-side slit of the partition wall that has become the partition structure. The tray according to any one of claims 1 to 4, characterized in that the storage space is partitioned into two parts. a pair of reinforcing crosspieces (60) extending from the pair of crosspieces toward the opening, folded back downwards, and overlapping the lower surfaces of the pair of crosspieces;
a pair of first reinforcing pieces (70) extending from the tips of the pair of reinforcing bars, bent downward with respect to the folded pair of reinforcing bars, and overlapping the pair of first side walls; 6. The tray according to claim 1, further comprising a tray. A blank forming a tray according to any one of claims 1 to 6.

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