JP2019202826A - Tray and blank sheet - Google Patents

Abstract

To provide a tray capable of being easily assembled, stabilizing shapes of a wall portion and a top edge plate, and increasing production efficiency.SOLUTION: The tray includes: a rectangular tube-like wall portion 10 in which a plurality of outer walls 11 to 14 are provided continuously in a circumferential direction; inner walls 21 to 24 provided continuously to a top edge portion of the outer walls 11 to 14; and a bottom plate 30 closing a lower opening of the wall 10. The inner walls 21 to 24 are folded inwardly with respect to the outer walls 11 to 14, and the bottom plate 30 is formed by a flap connected to a lower edge portion of the outer walls 11 to 14. The outer walls 11 to 14 and the inner walls 21 to 24 are connected through two parallel corrugator ruled lines L21 and L22, and a top edge plate 41 is formed between the two corrugator ruled lines L21 and L22.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tray, a blank sheet, and a blank sheet manufacturing method.

Corrugated trays include a rectangular bottom plate, front / rear / left / right outer walls raised at the edge of the bottom plate, a frame (top edge plate) connected to the upper edge of the outer wall, and a frame. And the inner wall is folded inward of the outer wall (see, for example, Patent Document 1).
When manufacturing the blank sheet of the conventional tray described above, a cardboard sheet is cut out by a cutting blade of a punching machine, and a ruled line blade of the punching machine is pressed against the sheet to form a ruled line.

JP 2014-133580 A

  In the conventional tray described above, since the adjacent outer walls are not continuously provided in the blank sheet state, when assembling the trays, it is necessary to connect the adjacent outer walls with a flap or an insertion piece. There is a problem that becomes complicated.

In addition, when folding a cardboard blank sheet, when the blank sheet is folded at right angles to the step direction (flute extension direction), the shape of the corner is most stable, and conversely, it is folded parallel to the step direction. The corner shape is not stable. However, when the wall portions are formed on the front, rear, left and right sides of the bottom plate as in the conventional tray described above, the ruled lines forming one pair of the front, rear, left and right walls are always formed in parallel with the step direction. When the inner and outer walls and the top edge plate are formed, the shape of the wall portion is not stable, and in particular, the shape of the corner portion formed between the narrow top edge plate and the inner and outer walls is not particularly stable. There is a problem.
Furthermore, in the above-described tray, since the step direction of any one of the pair of front, rear, left and right wall portions is arranged in parallel with the upper and lower edges of the wall portion, there is a problem in that the vertical strength (load resistance) is inferior. is there.

  Moreover, although the above-mentioned conventional tray manufactures a blank sheet by a punching machine, it is necessary to stop the sheet at the time of the punching process, so that the time required for the processing becomes long and the manufacturing efficiency is inferior. There's a problem.

  The present invention solves the above-described problems, can be easily assembled, can stabilize the shapes of the wall and the top edge plate, and can further improve the production efficiency. Tray, blank sheet and blank sheet It is an object to provide a manufacturing method.

  In order to solve the above-mentioned problem, the present invention is a tray, a cylindrical wall portion in which a plurality of outer walls are continuously provided in the circumferential direction, an inner wall that is continuously provided at an upper edge portion of the outer wall, and the wall And a bottom plate closing the lower opening of the part. The inner wall is folded inward of the outer wall. The bottom plate is formed by a flap that is connected to the lower edge of the outer wall. The outer wall and the inner wall are connected via two parallel corrugator ruled lines, and a top edge plate is formed between the two corrugator ruled lines.

  A blank sheet for a tray of the present invention, wherein a plurality of outer walls are continuously provided in one direction, an inner wall provided continuously to one edge of the outer wall, and the other edge of the outer wall. And a continuous flap. The outer wall and the inner wall are connected to each other via two corrugator ruled lines extending in one direction in parallel.

The tray of the present invention is a type 02 (so-called A-type box) type that can be manufactured by a corrugator and a flexo folder gluer (FFG). In the blank sheet of the present invention, a wall portion in which each outer wall is aligned in one direction is formed, and each inner wall is aligned in one direction at one edge of the wall portion, and each outer wall and each inner wall The boundary between them is a straight line extending in one direction.
Therefore, when manufacturing the blank sheet of the tray of the present invention, by moving the sheet in one direction and passing the sheet through the scorer of the corrugator (bonding machine), each corrugator ruled line extending in one direction, A boundary between the outer wall and each inner wall can be formed.

  When assembling the tray of the present invention, after the wall portion is formed into a cylindrical shape, the flap is bent with respect to the outer wall to form the bottom plate, and the inner wall is folded back with respect to the outer wall. Therefore, the tray of the present invention has walls at the front, rear, left and right edges of the bottom surface, and can shorten the assembly time compared to a conventional tray manufactured by a punching machine.

  Since the tray of the present invention does not require a flap or an insertion piece for connecting adjacent outer walls, the use area of the material can be reduced compared to a tray manufactured by a punching machine, and resources can be effectively used. Can be used.

In the tray of the present invention, when the blank sheet is bent at the corrugator ruled line, all the bent portions can be formed perpendicular to the step direction (flute extending direction), so the bent portion affects the step. Thus, the bent portion can be formed stably without meandering, and the shape of the corner can be stabilized. Therefore, in the tray of the present invention, the top edge plate can be stabilized substantially horizontally, and the strength (load resistance) in the vertical direction of the tray can be increased, so that a plurality of trays can be stacked stably.
Thereby, in this invention, since the number of trays which can be loaded on conveyance means, such as a truck, can be increased, conveyance cost can be reduced. In addition, since the number of trays that can be stored in a storage space such as a warehouse can be increased, storage costs can be reduced.

  When producing the tray of the present invention, a flexo folder gluer (box making machine) with high production efficiency can be used, so that the production efficiency can be increased as compared with the case where the tray is formed by a punching machine.

In the tray described above, it is preferable that the inner wall is inclined so as to approach the outer wall as it goes from the upper edge to the lower edge, and the lower edge of the inner wall is brought into contact with the upper surface of the bottom plate.
In this configuration, since the cross-sectional shapes of the outer wall, the top edge plate, and the inner wall are triangular, the load resistance of the outer wall, the top edge plate, and the inner wall can be increased.

  In the tray described above, an engagement piece projecting upward is formed on the upper edge of the outer wall, and the engagement piece is a part cut out of the top edge plate. It is preferable that an engagement hole into which the engagement piece of the tray is inserted is formed.

If it is this structure, when an inner wall will be turned inward with respect to an outer wall, an engagement piece will be cut | disconnected from a top edge board and it will be in the state which the engagement piece protruded from the upper edge part of the outer wall.
In addition, when the tray of the present invention is stacked on another tray, if the engaging piece of the lower tray is inserted into the engaging hole of the upper tray, the upper and lower trays can be prevented from shifting, so that Can be stacked stably.

  As a method for producing a blank sheet for a tray of the present invention, the first scorer and the second scorer of the corrugator are arranged side by side in the sheet moving direction, the ruler line roller of the first scorer, and the ruler line of the second scorer The rollers are arranged so as to be shifted in the lateral direction intersecting the sheet moving direction. Thereafter, the sheet is moved to pass the sheet through the first scorer and the second scorer, whereby two corrugator ruled lines are formed on the sheet by the ruled line rollers.

  In the blank sheet manufacturing method of the present invention, by arranging the two scorers side by side in the sheet moving direction, it is possible to prevent the ruled line rollers of both scorers from interfering in the lateral direction intersecting the sheet moving direction. Thereby, the space | interval of the horizontal direction of both ruled line rollers can be narrowed, and the space | interval of two corrugator ruled lines can be narrowed.

The tray of the present invention is a 02 type (A type box) type and can be easily assembled from the state of a blank sheet, so that the assembly time can be shortened.
Moreover, in the tray of this invention, since it is not necessary to connect an adjacent outer wall, the usage area of material can be reduced and resources can be utilized effectively.
Further, in the tray of the present invention, by forming the corrugator ruled line, the top edge plate can be stabilized substantially horizontally, and the load resistance of the tray can be increased, so that a plurality of trays can be stacked stably. it can.
Since the tray of the present invention can be manufactured by flexo folder gluer, the manufacturing efficiency can be increased.
In the blank sheet manufacturing method of the present invention, by using two scorers, the interval between the two ruled line rollers can be reduced, and therefore the interval between the two corrugator ruled lines can be reduced.

It is the perspective view which looked at the tray which concerns on 1st embodiment of this invention from the upper left front. It is the perspective view which looked at the tray which concerns on 1st embodiment of this invention from the lower right back. It is the figure which showed the tray which concerns on 1st embodiment of this invention, and is AA sectional drawing of FIG. It is the figure which showed the tray which concerns on 1st embodiment of this invention, and is BB sectional drawing of FIG. It is the figure which showed the blank sheet which concerns on 1st embodiment of this invention. It is the figure which showed the manufacturing method of the blank sheet which concerns on 1st embodiment of this invention, and is explanatory drawing which showed arrangement | positioning of the scorer of a corrugator. It is the figure which showed the manufacturing method of the blank sheet which concerns on 1st embodiment of this invention, and is explanatory drawing which showed the process of forming a corrugator ruled line. It is the figure which showed the assembly procedure of the tray which concerns on 1st embodiment of this invention, and is the perspective view which showed the process of assembling a baseplate. It is the figure which showed the assembly procedure of the tray which concerns on 1st embodiment of this invention, and is a perspective view of the state which assembled the wall part and the baseplate. It is the perspective view which looked at the tray which concerns on 2nd embodiment of this invention from the upper left front. It is the figure which showed the blank sheet which concerns on 2nd embodiment of this invention.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In the description of each embodiment, the same constituent elements are denoted by the same reference numerals, and redundant descriptions are omitted.
In the following description, the front, rear, left, and right directions are set for convenience in describing the tray of each embodiment, and do not limit the configuration of the tray.

[First embodiment]
As shown in FIGS. 1 and 2, the tray 1 of the first embodiment is folded back to the inside of each of the outer walls 11 to 14 and the rectangular tube-shaped wall portion 10 in which the front and rear, left and right outer walls 11 to 14 are continuously provided. The inner walls 21 to 24 and the bottom plate 30 closing the lower opening of the wall 10 are provided. The tray 1 of the first embodiment is a 02 type (A type box) type.

  As shown in FIG. 5, the tray 1 is formed by mountain-folding or valley-folding a blank sheet S obtained by cutting out a sheet of corrugated cardboard along each ruled line. The blank sheet S shown in FIG. 5 is arranged so that the inner surface side can be seen.

  As shown in FIG. 9, the wall portion 10 is formed by continuously connecting front and rear, left and right outer walls 11 to 14 in the circumferential direction. The wall portion 10 is formed in a rectangular rectangular tube shape in plan view, and is formed so that the front-rear direction is larger than the left-right direction.

  As shown in FIG. 1, the front outer wall 11 is formed in a rectangular shape, and is formed to have a larger left-right direction than a vertical direction.

As shown in FIG. 9, a right outer wall 14 is connected to the right edge of the front outer wall 11 via a ruled line L1 (see FIG. 5).
The right outer wall 14 extends rearward from the right edge of the front outer wall 11. The right outer wall 14 is formed perpendicular to the front outer wall 11. The right outer wall 14 is formed in a rectangular shape, and is formed so that the front-rear direction is larger than the vertical direction.
A rectangular engagement piece 16 projects upward at the center of the upper edge of the right outer wall 14.

A rear outer wall 12 is connected to the rear edge of the right outer wall 14 via a ruled line L2 (see FIG. 5).
The rear outer wall 12 extends leftward from the rear edge of the right outer wall 14. The rear outer wall 12 is formed perpendicular to the right outer wall 14. The rear outer wall 12 has the same outer shape as the front outer wall 11.

A left outer wall 13 is connected to the left edge of the rear outer wall 12 via a ruled line L3 (see FIG. 5).
The left outer wall 13 extends forward from the left edge of the rear outer wall 12. The left outer wall 13 is formed perpendicular to the rear outer wall 12. The left outer wall 13 has the same shape as the right outer wall 14, and an engagement piece 16 projects from the center of the upper edge of the left outer wall 13.

  A joining piece 15 is connected to the front edge of the left outer wall 13 via a ruled line L4 (see FIG. 5). The joining piece 15 is formed in a strip shape along the front edge of the left outer wall 13. The joining piece 15 is a part joined to the inner surface of the outer wall 11 on the front side by an adhesive.

As shown in FIG. 5, in the state of the blank sheet S, the front and rear, left and right outer walls 11 to 14 are continuously provided in one direction, and the wall portion 10 extends in one direction.
Then, while bending the blank sheet S along the ruled lines L1 to L4, by joining the joining piece 15 to the inner surface of the outer wall 11 on the front side, as shown in FIG. A wall 10 is formed.

  The ruled lines L1 to L4 are linear grooves (folded lines) formed by pressing the surface of the blank sheet S (see FIG. 5). A cut may be formed on the ruled line. If it does in this way, it will become easy to bend the blank sheet S in a ruled line.

  The lower opening of the wall 10 is closed by the bottom plate 30. As shown in FIG. 2, the bottom plate 30 is connected to the left and right inner flaps 31, 31 connected to the lower edges of the left and right outer walls 13, 14 and the lower edges of the front and rear outer walls 11, 12. The outer flaps 32 and 32 are comprised.

The left inner flap 31 is connected to the lower edge of the left outer wall 13 (see FIG. 1) via a corrugator ruled line L23. The right inner flap 31 is connected to the lower edge of the right outer wall 14 via a corrugator ruled line L23.
The front outer flap 32 is connected to the lower edge of the front outer wall 11 (see FIG. 1) via a corrugator ruled line L23. The rear outer flap 32 is connected to the lower edge of the rear outer wall 12 via a corrugator ruled line L23.
The corrugator ruled line L23 is a linear groove (folded line) formed by the corrugator 100 that manufactures the blank sheet S, as shown in FIG. The corrugator ruled line L23 is formed in parallel to the step direction of the blank sheet S (flute extension direction).

As shown in FIG. 8, the inner flap 31 is formed in a rectangular shape, and the front edge portions of the left and right inner flaps 31, 31 are abutted at the central portion in the left-right direction of the tray 1.
When the left and right inner flaps 31 are closed, a pair of front and rear mounting holes 31 a and 31 a are formed in the center portion of the bottom plate 30.
A slit is formed from the left and right ends of the front mounting hole 31a toward the front. In addition, slits are formed from the left and right ends of the rear mounting hole 31a toward the rear.

  The outer flap 32 is formed in a trapezoidal shape whose width in the left-right direction becomes narrower from the base end portion toward the tip end portion. An insertion piece 32 a is formed at the front end edge of the outer flap 32. The insertion piece 32a is formed to have a width in the left-right direction that is larger than a tip edge portion of the outer flap 32, and is formed to be larger than a width in the left-right direction of the mounting hole 31a.

  As shown in FIG. 2, front and rear outer flaps 32, 32 are superimposed on the lower surfaces of the left and right inner flaps 31, 31. And the insertion piece 32a of the outer flap 32 is inserted in the attachment hole 31a of both the inner flaps 31,31. In this way, the bottom plate 30 is formed by connecting the inner flaps 31, 31 and the outer flaps 32, 32.

  At the corner between the left outer wall 13 and the inner flap 31, a rectangular engagement hole 17 passes through the center in the front-rear direction. The engagement hole 17 is a part into which the engagement piece 16 of the other tray 1 is inserted when the tray 1 is stacked on the upper surface of the other tray 1. Engagement holes 17 are also formed at the corners of the right outer wall 14 and the inner flap 31.

As shown in FIG. 9, the front inner wall 21 is connected to the upper edge of the front outer wall 11 via two inner and outer corrugator ruled lines L21 and L22.
The corrugator ruled lines L21 and L22 are linear grooves (folded lines) formed by the corrugator 100 that manufactures the blank sheet S, as shown in FIG. The corrugator ruled lines L21 and L22 are formed in parallel with the step direction of the blank sheet S (flute extension direction).
The inner and outer corrugator ruled lines L21 and L22 extend in the left-right direction, and are arranged in parallel with a space in the front-rear direction (inner / outer direction). As shown in FIG. 1, a front top edge plate 41 is formed between the inner and outer corrugator ruled lines L21 and L22.

The front side top edge plate 41 is connected to the upper edge portion of the front side outer wall 11 via the outer corrugator ruled line L21.
The front top edge plate 41 is a rectangular portion formed in a band shape along the upper edge of the front outer wall 11. The front top edge plate 41 extends rearward from the upper edge of the front outer wall 11. The front top edge plate 41 is disposed substantially horizontally.

A front inner wall 21 is connected to the inner edge portion of the top edge plate 41 via an inner corrugator ruled line L22 (see FIG. 9).
The front inner wall 21 is formed in a rectangular shape and extends downward from the inner edge of the front top edge plate 41. The width of the front inner wall 21 in the left-right direction is smaller than the width of the front outer wall 11 and the top edge plate 41 in the left-right direction (see FIG. 5).
Projection pieces 25, 25 projecting in the left-right direction are formed at the lower end of the side edge of the front inner wall 21 (see FIG. 5). A finger hook hole 27 is formed at the center of the lower edge of the inner wall 21 on the front side.

As shown in FIG. 4, the front inner wall 21 is folded inward with respect to the front outer wall 11, and the outer wall 11 and the inner wall 21 form a double wall.
The inner wall 21 on the front side is inclined toward the lower edge portion from the upper edge portion so that it approaches the outer wall 11 on the front side. The lower edge of the front inner wall 21 is pressed against the upper surface of the bottom plate 30.
The cross-sectional shapes of the outer wall 11 on the front side, the top edge plate 41 and the inner wall 21 are triangular. As described above, the cross-sectional shape of the front wall of the tray 1 is a hollow triangular shape.

  As shown in FIG. 9, the rear inner wall 22 is connected to the upper edge of the rear outer wall 12 via two inner and outer corrugator ruled lines L21 and L22. A rear top edge plate 41 is formed between the inner and outer corrugator ruled lines L21 and L22. As shown in FIG. 4, the rear outer wall 12, the top edge plate 41, and the inner wall 22 are symmetric with respect to the front outer wall 12, the top edge plate 41, and the inner wall 22.

As shown in FIG. 9, the right inner wall 24 is connected to the upper edge of the right outer wall 14 via two inner and outer corrugator ruled lines L21 and L22.
The inner and outer corrugator ruled lines L21 and L22 extend in the front-rear direction in parallel with the step direction (flute extension direction) of the blank sheet S, and are arranged in parallel in the left-right direction (inner-outer direction). A right top edge plate 41 is formed between the inner and outer corrugator ruled lines L21 and L22 as shown in FIG.

The front side top edge plate 41 is connected to the upper edge portion of the front side outer wall 11 via the outer corrugator ruled line L21.
The front top edge plate 41 is a rectangular portion formed in a band shape along the upper edge of the front outer wall 11. The front top edge plate 41 extends rearward from the upper edge of the front outer wall 11. The front top edge plate 41 is disposed substantially horizontally.

The inner wall 24 on the right side is connected to the inner edge of the top edge plate 41 via the inner corrugator ruled line L22 (see FIG. 9).
As shown in FIG. 4, the right inner wall 24 is formed in a rectangular shape, and extends downward from the inner edge portion of the front top edge plate 41. The width in the left-right direction of the right inner wall 24 is the same as the width in the left-right direction of the right outer wall 14 and the top edge plate 41 (see FIG. 5).
Cutout portions 26 and 26 are formed at the lower end portion of the side edge portion of the right inner wall 24 (see FIG. 5). A finger hook hole 28 is formed at the center of the lower edge of the right inner wall 24.

As shown in FIG. 3, the right inner wall 24 is folded inward with respect to the right outer wall 14, and the outer wall 14 and the inner wall 24 form a double wall.
The right inner wall 24 is inclined from the upper edge toward the lower edge so as to approach the right outer wall 14. The lower edge of the right inner wall 24 is pressed against the upper surface of the bottom plate 30.
The cross-sectional shapes of the right outer wall 14, the top edge plate 41, and the inner wall 24 are triangular. As described above, the cross-sectional shape of the front wall of the tray 1 is a hollow triangular shape.

  As shown in FIG. 9, the left inner wall 22 is connected to the upper edge of the left outer wall 13 via two inner and outer corrugator ruled lines L21 and L22. A left top edge plate 41 is formed between the inner and outer corrugator ruled lines L21 and L22. As shown in FIG. 3, the left outer wall 13, the top edge plate 41, and the inner wall 22 are symmetrical to the right outer wall 14, the top edge plate 41, and the inner wall 24.

  As shown in FIG. 1, the opening edge on the upper side of the wall 10 is surrounded by front, rear, left and right top edge plates 41. A substantially horizontal upper surface is formed at the opening edge of the upper opening of the wall 10 by front, rear, left and right top edge plates 41.

Next, the manufacturing method of the blank sheet S of 1st embodiment is demonstrated.
The tray 1 of the first embodiment is an A-type box type, and the blank sheet S for the tray 1 includes a wall portion 10 in which front and rear, left and right outer walls 11 to 14 are arranged in one direction as shown in FIG. Is formed. Further, the inner walls 21 to 24 are arranged in one direction on one edge (upper edge) of the wall 10. Further, four flaps 31 and 32 are arranged in one direction on the other edge (lower edge) of the wall 10.
Therefore, in the blank sheet S, the boundary between each outer wall 11-14 and each inner wall 21-24 becomes a straight line extending in one direction. In the blank sheet S, the boundary between the outer walls 11 to 14 and the flaps 31 and 32 is a straight line extending in one direction.

  As shown in FIG. 6, the tray 1 of the first embodiment can be manufactured by a slitter scorer of a corrugator. Specifically, the sheet S1 made of cardboard is moved in one direction C1, and the sheet S1 is passed through each device in the corrugator 100, whereby the sheet S1 is cut into a predetermined shape and a ruled line is formed on the sheet S1. Can be formed. Note that the movement direction (one direction C1) of the sheet S1 is parallel to the cardboard cardboard direction.

  The corrugator 100 is provided with a first scorer 110 and a second scorer 120. Using these two scorers 110 and 120, three corrugator ruled lines L21 to L23 are formed on the sheet S1.

The first scorer 110 is provided with a pair of upper and lower first ruled line rollers 111 and 111 and a pair of upper and lower second ruled line rollers 112 and 112.
On the outer peripheral surfaces of the upper and lower first ruled line rollers 111 and 111, as shown in FIG. 7, irregularities extending in the circumferential direction are formed over the entire circumference.
When the sheet S1 passes between the upper and lower first ruled line rollers 111, 111 in one direction C1, the irregularities on the outer peripheral surfaces of the first ruled line rollers 111, 111 are pressed against the outer surface and the inner surface of the sheet S1, and the sheet S1 Corrugator ruled line L21 is formed.

  The corrugator ruled line L21 includes two grooves L21a and L21a formed on the outer surface of the sheet S1 and one groove L21b formed on the inner surface of the sheet S1. A groove L21b on the inner surface is formed at a position between the two grooves L21a and L21a on the outer surface.

As shown in FIG. 6, the upper and lower second ruled line rollers 112 and 112 are arranged at an interval in the lateral direction C2 orthogonal to the one direction C1 with respect to the upper and lower first ruled line rollers 111 and 111.
The upper and lower second ruled line rollers 112 and 112 have the same configuration as the upper and lower first ruled line rollers 111 and 111. When the sheet S1 passes between the upper and lower second ruled line rollers 112, 112 in one direction C1, a corrugator ruled line L23 is formed on the sheet S1.

The second scorer 120 is arranged side by side downstream of the first scorer 110 in one direction C1. The second scorer 120 is provided with a pair of upper and lower third ruled line rollers 113, 113.
As shown in FIG. 7, the upper and lower third ruled line rollers 113 and 113 are formed with unevenness over the entire circumference as in the case of the upper and lower first ruled line rollers 111 and 111.
When the sheet S1 passes between the upper and lower third ruled line rollers 113, 113 in one direction C1, two grooves L22a, L22a are formed on the outer surface of the sheet S1, and one groove L22b is formed on the inner surface of the sheet S1. And a corrugator ruled line L22 is formed on the sheet S1.

  The corrugator ruled line L21 formed by both the first ruled line rollers 111, 111 and the corrugator ruled line L22 formed by the both third ruled line rollers 113, 113 extend in parallel in one direction C1. The interval between the two corrugator ruled lines L21 and L22 is formed narrow, for example, an interval of 12 mm.

In the corrugator 100 according to the first embodiment, since the two scorers 110 and 120 are arranged side by side in the front-rear direction, both first ruled rollers 111 and 111 of the first scorer 110 and both third rulers of the second scorer 120 are arranged. The rollers 113 and 113 are configured not to interfere with each other in the lateral direction orthogonal to one direction.
Thereby, in the corrugator 100, both the first ruled line rollers 111, 111 and the both third ruled line rollers 113, 113 can be brought close to each other in the lateral direction C2 orthogonal to one direction, and the two corrugator ruled lines L21, L22 are arranged. The interval can be reduced.

Next, the procedure for assembling the tray 1 of the first embodiment will be described.
While the blank sheet S shown in FIG. 5 is bent along the ruled lines L1 to L4, the joining piece 15 is joined to the inner surface of the outer wall 11 on the front side, thereby forming a square tubular wall 10 as shown in FIG.
The tray 1 of the first embodiment is delivered to a customer with the wall 10 formed at the factory and the wall 10 folded.

When the customer uses the tray 1, first, the wall portion 10 is formed in a cylindrical shape, and the wall portion 10 is arranged so that the lower opening is on the upper side (state in FIG. 9).
In this state, the left and right inner flaps 31, 31 are bent inward with respect to the left and right outer walls 13, 14 (see FIG. 2). Further, the left and right outer flaps 32, 32 are bent inward with respect to the front and rear outer walls 11, 12 (see FIG. 2).

When the inner flaps 31, 31 are pushed in by the outer flaps 32, 32, the insertion pieces 32 a of the outer flap 32 are inserted into the mounting holes 31 a of the inner flaps 31, 31.
As a result, as shown in FIG. 2, the bottom plate 30 is formed by the inner flaps 31, 31 and the outer flaps 32, 32, and the lower opening of the wall 10 is closed by the bottom plate 30.

  Then, as shown in FIG. 9, the wall part 10 is arrange | positioned so that the baseplate 30 may become a lower side. In FIG. 9, in order to make the structure of the tray 1 easy to understand, the inner walls 21 to 24 are greatly opened outward. However, in the actual assembly process, the inner walls 21 to 24 are directed upward from the outer walls 11 to 14. Has been launched.

  As shown in FIG. 1, the left inner wall 23 is folded inward with respect to the left outer wall 13, and the right inner wall 24 is folded inward with respect to the right outer wall 14. Thereby, the left and right top edge boards 41 and 41 are formed.

  When the left and right inner walls 23, 24 are folded inward with respect to the left and right outer walls 13, 14, the engagement piece 16 is separated from the top edge plate 41, and the engagement piece 16 protrudes from the upper edge of the outer walls 13, 14. It will be in the state. Thus, the engagement piece 16 can be automatically protruded.

Further, the front inner wall 21 is folded inward with respect to the front outer wall 11 and the rear inner wall 22 is folded inward with respect to the rear outer wall 12. Thereby, the front and rear top edge plates 41 and 41 are formed.
When the front and rear inner walls 21 and 22 are folded back inward with respect to the front and rear outer walls 11 and 12, the protruding pieces 25 of the front and rear inner walls 21 and 22 enter the notches 26 of the left and right inner walls 23 and 24. Is locked to the notch 26.

Since the tray 1 of the first embodiment as described above is a 02 type (A type box) type as shown in FIG. 6, the blank sheet S is moved by the corrugator 100 while moving the sheet S <b> 1 in one direction C <b> 1. Since it can manufacture, manufacturing efficiency can be improved.
Moreover, when manufacturing the tray 1, since a flexo folder gluer with high production efficiency can be used, compared with the case where a tray is formed with a punching machine, manufacturing efficiency can be improved.

  In the manufacturing method of the blank sheet S of the first embodiment, the two scorers 110 and 120 are arranged side by side in one direction C1, so that both ruled line rollers 111 and 113 of both scorers 110 and 120 intersect in one direction C1. Interference in the direction C2 can be prevented. Thereby, the space | interval of the two ruled line rollers 111 and 113 can be made small, and the space | interval of the two corrugator ruled lines L21 and L22 can be made narrow.

  When assembling the tray 1 of the first embodiment, as shown in FIG. 1, after forming the wall portion 10 and the bottom plate 30, the inner walls 21 to 24 may be folded with respect to the outer walls 11 to 14. Thus, the tray 1 can be easily assembled, and the assembly time can be shortened.

  Since the tray 1 of the first embodiment does not require a flap or an insertion piece for connecting adjacent outer walls 11 to 14, the use area of the material is reduced as compared with a tray manufactured by a punching machine. And resources can be used effectively.

When the blank sheet S of the first embodiment (see FIG. 5) is bent at the corrugator ruled lines L21 to L23, all the bent portions can be formed perpendicular to the step direction. The bent portion can be stably formed without being meandered by being influenced by the above, and the shape of the corner portion can be stabilized. Moreover, in the tray 1, the cross-sectional shape of the outer walls 11-14, the top edge board 41, and the inner walls 21-24 becomes a triangle, and the top edge board 41 can be stabilized substantially horizontally.
Further, when the plurality of trays 1 are stacked, if the engagement pieces 16 of the lower tray 1 are inserted into the engagement holes 17 of the upper tray 1, the upper and lower trays 1 and 1 can be connected.
Therefore, the strength (load resistance) in the vertical direction of the tray 1 can be increased and the displacement of the upper and lower trays 1 and 1 can be prevented, so that a plurality of trays 1 can be stacked stably.
Thereby, since the number of trays 1 that can be loaded on a transportation means such as a truck can be increased, the transportation cost can be reduced. Further, since the number of trays 1 that can be stored in a storage space such as a warehouse can be increased, the storage cost can be reduced.

As mentioned above, although 1st embodiment of this invention was described, this invention is not limited to said 1st embodiment, In the range which does not deviate from the meaning, it can change suitably.
As shown in FIG. 1, the wall portion 10 of the tray 1 of the first embodiment is formed in a rectangular tube shape in which front, rear, left and right outer walls 11 to 14 are continuously provided, but the shape of the wall portion is limited. It can also be formed in a polygonal cylinder such as a hexagon or an octagon.

  As shown in FIG. 2, the bottom plate 30 of the tray 1 of the first embodiment is formed by four flaps 31 and 32. However, the number of flaps forming the bottom plate 30 and the means for connecting the flaps are limited. It is not a thing.

  In the tray 1 of the first embodiment, as shown in FIG. 1, the engagement pieces 16 are formed on the upper edge portions of the left and right outer walls 13, 14. A piece may be formed. Or it is not necessary to form an engagement piece and an engagement hole in the outer walls 11-14 of front and rear, right and left.

  Although the tray 1 of the first embodiment is made of cardboard, the tray may be formed of various known paperboards.

[Second Embodiment]
As shown in FIG. 10, the tray 1A of the second embodiment has substantially the same configuration as the tray 1 of the first embodiment (see FIG. 1), and is provided with two partition plates 51 and 52. Is different.

  In the tray 1A of the second embodiment, two partition plates 51 and 52 are arranged orthogonally on the upper surface of the bottom plate 30, and the inner space of the tray 1A is partitioned into four spaces by the partition plates 51 and 52. It has been.

The first partition plate 51 is a rectangular flat plate extending in the left-right direction across the left and right inner walls 23, 24 (see FIG. 11). The first partition plate 51 is disposed at the center of the bottom plate 30 in the front-rear direction.
Insertion pieces 51 a and 51 a (see FIG. 11) protrude from left and right edges of the first partition plate 51. Both insertion pieces 51a, 51a are inserted into through holes 23a, 24a (see FIG. 11) formed in the left and right inner walls 23, 24. Thereby, the left and right edges of the first partition plate 51 are supported by the left and right inner walls 23 and 24.
A connecting slit 51b extends downward from the upper edge portion in the central portion of the first partition plate 51 in the left-right direction.

The second partition plate 52 is a rectangular flat plate extending in the front-rear direction across the front and rear inner walls 21 and 22 (see FIG. 11). The second partition plate 52 is disposed at the center of the bottom plate 30 in the left-right direction.
Insertion pieces 52 a and 52 a (see FIG. 11) protrude from front and rear edges of the second partition plate 52. Both insertion pieces 52a and 52a are inserted into through holes 21a and 22a (see FIG. 11) formed in the front and rear inner walls 21 and 22, respectively. Thereby, the front and rear edges of the second partition plate 52 are supported by the front and rear inner walls 21 and 22.
A connecting slit 52b (see FIG. 11) extends upward from the lower edge portion in the center portion of the second partition plate 52 in the front-rear direction.

  A second partition plate 52 is inserted into the connection slit 51 b of the first partition plate 51. The first partition wall 51 is inserted into the connection slit 52 b of the second partition plate 52. In this way, the first partition plate 51 and the second partition plate 52 are combined at the center of the bottom plate 30.

  When assembling the tray 1A of the second embodiment, first, the bottom plate 30, the outer walls 10 to 14, and the inner walls 21 to 24 are assembled in the same manner as the tray 1 (see FIG. 1) of the first embodiment. Thereafter, the first partition plate 51 is assembled to the left and right inner walls 23 and 24. Further, the second partition plate 52 is assembled to the front and rear inner walls 21 and 22 and the first partition plate 51.

  In the tray 1A of the second embodiment, the internal space is divided into four by the two partition plates 51 and 52, but the number of partition plates is not limited. For example, the internal space can be divided into two by a single partition plate. In addition, the internal space can be divided into a large number by three or more partition plates.

1 tray (first embodiment)
1A tray (second embodiment)
DESCRIPTION OF SYMBOLS 10 Wall part 11 Front side outer wall 12 Rear side outer wall 13 Left side outer wall 14 Right side outer wall 15 Joint piece 16 Engagement piece 17 Engagement hole 21 Front side inner wall 22 Rear side inner wall 23 Left side inner wall 24 Right side inner wall 30 Bottom plate 31 inner flap 32 outer flap 41 top edge plate 51 first partition plate 52 second partition plate 100 corrugator 110 first scorer 111 first ruler roller 112 second ruler roller 113 third ruler roller 120 second scorer L21 corrugator ruler L22 corrugator Ruled Line L23 Corrugator Ruled Line S Blank Sheet S1 Sheet

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

The present invention is to solve the aforementioned problem, it is possible to easily assemble, it is possible to stabilize the shape of the walls and top edge plate further provides a tray and a blank sheet which can increase the production efficiency The task is to do.

In order to solve the above-mentioned problem, the present invention is a tray, a cylindrical wall portion in which a plurality of outer walls are continuously provided in the circumferential direction, an inner wall that is continuously provided at an upper edge portion of the outer wall, and the wall And a bottom plate closing the lower opening of the part. The inner wall is folded inward of the outer wall. The bottom plate is formed by a flap that is connected to the lower edge of the outer wall. The outer wall and the inner wall are connected via two parallel corrugator ruled lines. The outer corrugator ruled line extends continuously over the entire upper edge of the outer wall, and the inner corrugator ruled line extends continuously over the entire upper edge of the inner wall . A top edge plate is formed therebetween.

A blank sheet for a tray of the present invention, wherein a plurality of outer walls are continuously provided in one direction, an inner wall provided continuously to one edge of the outer wall, and the other edge of the outer wall. And a continuous flap. The outer wall and the inner wall are connected to each other via two corrugator ruled lines extending in one direction in parallel , and the outer corrugator ruled line extends continuously over the entire upper edge of the outer wall. In addition, the inner corrugator ruled line continuously extends over the entire upper edge of the inner wall.

The left inner flap 31 is connected to the lower edge of the left outer wall 13 (see FIG. 1) via a corrugator ruled line L23. The right inner flap 31 is connected to the lower edge of the right outer wall 14 via a corrugator ruled line L23.
The front outer flap 32 is connected to the lower edge of the front outer wall 11 (see FIG. 1) via a corrugator ruled line L23. The rear outer flap 32 is connected to the lower edge of the rear outer wall 12 via a corrugator ruled line L23.
The corrugator ruled line L23 is a linear groove (folded line) formed by the corrugator 100 that manufactures the blank sheet S, as shown in FIG. The corrugator ruled line L23 is formed perpendicular to the step direction of the blank sheet S (flute extension direction).

As shown in FIG. 9, the front inner wall 21 is connected to the upper edge of the front outer wall 11 via two inner and outer corrugator ruled lines L21 and L22.
The corrugator ruled lines L21 and L22 are linear grooves (folded lines) formed by the corrugator 100 that manufactures the blank sheet S, as shown in FIG. The corrugator ruled lines L21 and L22 are formed perpendicular to the step direction of the blank sheet S (flute extension direction).
The inner and outer corrugator ruled lines L21 and L22 extend in the left-right direction, and are arranged in parallel with a space in the front-rear direction (inner / outer direction). As shown in FIG. 1, a front top edge plate 41 is formed between the inner and outer corrugator ruled lines L21 and L22.

As shown in FIG. 9, the right inner wall 24 is connected to the upper edge of the right outer wall 14 via two inner and outer corrugator ruled lines L21 and L22.
The inner and outer corrugator ruled lines L21 and L22 extend in the front-rear direction perpendicular to the step direction (flute extension direction) of the blank sheet S, and are arranged in parallel in the left-right direction (inner-outer direction). A right top edge plate 41 is formed between the inner and outer corrugator ruled lines L21 and L22 as shown in FIG.

As shown in FIG. 6, the tray 1 of the first embodiment can be manufactured by a slitter scorer of a corrugator. Specifically, the sheet S1 made of cardboard is moved in one direction C1, and the sheet S1 is passed through each device in the corrugator 100, whereby the sheet S1 is cut into a predetermined shape and a ruled line is formed on the sheet S1. Can be formed. Note that the moving direction (one direction C1) of the sheet S1 is perpendicular to the step direction of the cardboard.

Claims (5)

A cylindrical wall portion in which a plurality of outer walls are continuously provided in the circumferential direction;
An inner wall connected to the upper edge of the outer wall;
A bottom plate closing the lower opening of the wall,
The inner wall is folded inward of the outer wall;
The bottom plate is formed by a flap provided continuously to a lower edge portion of the outer wall,
The outer wall and the inner wall are connected via two parallel corrugator ruled lines,
A tray, wherein a top edge plate is formed between the corrugator ruled lines. The tray according to claim 1,
The tray, wherein the inner wall is inclined so as to approach the outer wall from the upper edge toward the lower edge, and the lower edge of the inner wall is in contact with the upper surface of the bottom plate. The tray according to claim 1 or 2, wherein
An engagement piece projecting upward is formed on the upper edge of the outer wall,
The engagement piece is a part cut out from the top edge plate,
An engaging hole into which the engaging piece of another tray can be inserted is formed in the lower edge of the outer wall. A blank sheet for a tray,
A wall portion in which a plurality of outer walls are arranged in one direction;
An inner wall connected to one edge of the outer wall;
A flap connected to the other edge of the outer wall,
The blank sheet, wherein the outer wall and the inner wall are connected via two corrugator ruled lines extending in parallel in one direction. A method for manufacturing a blank sheet for a tray,
While arranging the corrugator's first scorer and second scorer side by side in the moving direction of the seat,
The first scorer ruled line roller and the second scorer ruled line roller are arranged to be shifted in the transverse direction intersecting the sheet moving direction;
Forming two corrugator ruled lines on the sheet by the both ruled line rollers by moving the sheet and passing the sheet through the first scorer and the second scorer. A method for producing a blank sheet.

Images