JP6648600B2 - Blank sheet manufacturing method - Google Patents

Description

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

As a cardboard tray, a rectangular bottom plate, front, rear, left and right outer walls raised on the edge of the bottom plate, a frame (top frame) connected to an upper edge of the outer wall, and a frame are connected to the frame. And an inner wall which is folded inward of the outer wall (for example, see Patent Document 1).
When manufacturing the blank sheet of the above-mentioned conventional tray, a sheet made of corrugated cardboard 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 above-mentioned conventional tray, in the state of the blank sheet, the adjacent outer walls are not continuously provided. Therefore, when assembling the tray, it is necessary to connect the adjacent outer walls by a flap or an insertion piece. Is complicated.

Furthermore, when bending a blank sheet of corrugated cardboard, the shape of the corners is most stable when the blank sheet is bent at a right angle in the step direction (extending direction of the flute), and conversely, when the sheet is bent in parallel to the step direction. Has unstable corner shapes. However, when the walls are formed on the front, rear, left and right of the bottom plate as in the conventional tray described above, the ruled lines forming any one pair of the front, rear, left and right walls are always formed in parallel with the step direction. When the inner wall, the outer wall, and the top edge plate are formed, the shape of the wall portion is not stable, and particularly, the shape of the corner portion formed between the narrow top edge plate and the inner wall and the outer wall is particularly difficult to stabilize. There is a problem.
Furthermore, in the above-mentioned tray, since the step direction of a pair of front, rear, left and right wall portions is arranged in parallel with the upper and lower edges of the wall portions, there is a problem that the strength (load resistance) in the vertical direction is inferior. is there.

  In addition, the above-described conventional tray manufactures blank sheets by a punching machine. However, in the case of punching processing, the sheets must be stopped, so that the processing time becomes longer and manufacturing efficiency is deteriorated. There's a problem.

  The present invention solves the above-mentioned problems, and can easily assemble, stabilize the shapes of the wall and the top edge plate, and further increase the production efficiency, a tray, a blank sheet, and a blank sheet. It is an object of the present invention to provide a method for manufacturing the same.

  In order to solve the above-mentioned problem, the present invention provides a tray, wherein a cylindrical wall portion in which a plurality of outer walls are connected in a circumferential direction, an inner wall connected to an upper edge of the outer wall, A bottom plate closing a lower opening of the portion. The inner wall is folded inward of the outer wall. The bottom plate is formed by a flap connected to a lower edge of the outer wall. The outer wall and the inner wall are connected to each other 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 according to the present invention, wherein a plurality of outer walls are connected in one direction, an inner wall connected to one edge of the outer wall, and the other edge of the outer wall. And a flap connected continuously. 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 is formed in which the outer walls are arranged in one direction, and the inner walls are arranged in one direction at one edge of the 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 a corrugator (lamination machine) scorer, each corrugator ruled line extending in one direction allows 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 in a cylindrical shape, the flap may be bent against the outer wall to form the bottom plate, and the inner wall may be turned back against 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 reduce assembling time as compared with a conventional tray manufactured by a punching machine.

  The tray of the present invention does not require flaps or inserts for connecting adjacent outer walls, so that the area of material used can be reduced as compared with trays manufactured by a punching machine, and resources can be effectively used. Can be used for

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 (extending direction of the flute), so that the bent portion affects the step. The bent portion can be formed stably without meandering, and the shape of the corner portion can be stabilized. Therefore, in the tray of the present invention, the top edge plate can be stabilized substantially horizontally, and the strength (withstand load) in the vertical direction of the tray can be increased, so that a plurality of trays can be stably stacked.
As a result, in the present invention, the number of trays that can be loaded on a transportation means such as a truck can be increased, and thus transportation costs can be reduced. Further, 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 manufacturing the tray of the present invention, a flexo folder gluer (box making machine) having 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 from the upper edge toward 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 above-mentioned tray, an engaging piece projecting upward is formed at an upper edge portion of the outer wall, and the engaging piece is a portion cut out of the top edge plate. It is preferable that the tray has a configuration in which an engagement hole into which the engagement piece can be inserted is formed.

With this configuration, when the inner wall is folded inward with respect to the outer wall, the engaging piece is separated from the top edge plate, and the engaging piece projects from the upper edge 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, it is possible to prevent the upper and lower trays from being shifted. Trays can be stably stacked.

The blank sheet used in the method for manufacturing a blank sheet for a tray according to the present invention includes a wall portion having a plurality of outer walls connected in one direction, an inner wall connected to one edge of the outer wall, and the outer wall. And a flap connected to the other edge of the flap. And the first scorer and the second scorer of the corrugator are arranged and arranged in the moving direction of the sheet, the first ruler roller and the second ruler roller of the first scorer, and the third ruler roller of the second scorer , Are shifted in the horizontal direction intersecting the moving direction of the sheet. Thereafter, by moving the sheet and passing the sheet through the first scorer and the second scorer, the two lines extending in one direction in parallel by the first ruler roller and the third ruler roller The corrugator ruled line is formed between the outer wall and the inner wall in the sheet, and the corrugator ruled line extending in one direction by the second ruled roller is formed between the outer wall and the flap in the sheet. Form.

  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 horizontal direction intersecting the sheet moving direction. As a result, the horizontal interval between the two ruled line rollers can be reduced, and the interval between the two corrugator ruled lines can be reduced.

The tray of the present invention is a 02 type (A type box) type, and can be easily assembled from a blank sheet state, so that the assembling time can be reduced.
Further, in the tray of the present invention, it is not necessary to connect the adjacent outer walls, so that the area used for the material can be reduced, and the resources can be used effectively.
Further, in the tray of the present invention, by forming the corrugator ruled lines, the top edge plate can be stabilized substantially horizontally, and the load capacity of the tray can be increased, so that a plurality of trays can be stably stacked. it can.
Since the tray of the present invention can be manufactured by flexo folder gluer, manufacturing efficiency can be improved.
In the method for manufacturing a blank sheet according to the present invention, by using two scorers, the interval between two ruled line rollers can be narrowed, so that the interval between two corrugator ruled lines can be narrowed.

It is the perspective view which looked at the tray concerning a first embodiment of the present 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 lower right rear. FIG. 2 is a diagram illustrating a tray according to the first embodiment of the present invention, and is a cross-sectional view along AA in FIG. 1. FIG. 2 is a diagram illustrating a tray according to the first embodiment of the present invention, and is a cross-sectional view taken along line BB of FIG. 1. It is a figure showing a blank sheet concerning a first embodiment of the present invention. FIG. 4 is a diagram illustrating a method for manufacturing a blank sheet according to the first embodiment of the present invention, and is an explanatory diagram illustrating an arrangement of a scorer of a corrugator. FIG. 4 is a diagram illustrating a method of manufacturing a blank sheet according to the first embodiment of the present invention, and is an explanatory diagram illustrating a step of forming a corrugator ruled line. FIG. 5 is a perspective view illustrating a process of assembling a bottom plate, illustrating a procedure of assembling the tray according to the first embodiment of the present invention. It is a figure showing the procedure of assembling the tray concerning a first embodiment of the present invention, and is a perspective view in the state where a wall and a bottom plate were assembled. It is the perspective view which looked at the tray concerning a second embodiment of the present invention from the upper left front. It is a figure showing a blank sheet concerning a second embodiment of the present invention.

An embodiment of the present invention will be described in detail with reference to the drawings as appropriate.
In the description of each embodiment, the same components will be denoted by the same reference symbols, without redundant description.
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 according to the first embodiment has a rectangular cylindrical wall portion 10 in which front, rear, left, and right outer walls 11 to 14 are continuously provided, and is folded inside each of the outer walls 11 to 14. And a bottom plate 30 closing the lower opening of the wall 10. 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 folding a blank sheet S obtained by cutting out a single sheet of corrugated cardboard into mountain lines or valleys at 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 has front, rear, left and right outer walls 11 to 14 provided continuously in a circumferential direction. The wall portion 10 is formed in a rectangular prism shape in a plan view, and is formed larger in the front-rear direction than in the left-right direction.

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

As shown in FIG. 9, a right outer wall 14 is continuously provided on 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 to be larger in the front-rear direction than in the vertical direction.
At the center of the upper edge of the right outer wall 14, a rectangular engaging piece 16 protrudes upward.

The 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 protrudes from the center of the upper edge of the left outer wall 13.

  A joining piece 15 is continuously provided on 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 belt shape along the front edge of the left outer wall 13. The joining piece 15 is a portion joined to the inner surface of the front outer wall 11 by an adhesive.

As shown in FIG. 5, in the state of the blank sheet S, the front, 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, by joining the joining piece 15 to the inner surface of the front outer wall 11 while bending the blank sheet S along the ruled lines L1 to L4, 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). Note that a cut may be formed on the ruled line. This makes it easier to bend the blank sheet S at the 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 to the lower edges of the front and rear outer walls 11, 12. The outer flaps 32, 32 are provided.

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 a lower edge portion 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 corrugated 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 perpendicularly to the step direction (extending direction of the flute) of the blank sheet S.

As shown in FIG. 8, the inner flaps 31 are formed in a rectangular shape, and the end edges of the left and right inner flaps 31, 31 are abutted at the center of the tray 1 in the left-right direction.
When the left and right inner flaps 31, 31 are closed, a pair of front and rear mounting holes 31a, 31a are formed in the center of the bottom plate 30.
A slit is formed from the left and right ends of the front mounting hole 31a toward the front. Further, a slit is formed rearward from the left and right ends of the rear mounting hole 31a.

  The outer flap 32 is formed in a trapezoidal shape in which the width in the left-right direction decreases from the base end to the tip. An insertion piece 32 a is formed at the tip edge of the outer flap 32. The width of the insertion piece 32a in the left-right direction is formed larger than the leading edge of the outer flap 32, and is larger than the width of the mounting hole 31a in the left-right direction.

  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, respectively. And the insertion piece 32a of the outer flap 32 is inserted into the mounting hole 31a of both inner flaps 31,31. Thus, the bottom plate 30 is formed by connecting the both inner flaps 31, 31 and the outer flaps 32, 32.

  At a corner between the left outer wall 13 and the inner flap 31, a rectangular engaging hole 17 penetrates a central portion in the front-rear direction. The engaging hole 17 is a portion into which the engaging piece 16 of another tray 1 is inserted when the tray 1 is stacked on the upper surface of another tray 1. An engagement hole 17 is also formed at a corner between the right outer wall 14 and the inner flap 31.

As shown in FIG. 9, a 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 perpendicularly to the step direction (extending direction of the flute) of the blank sheet S.
The inner and outer corrugator ruled lines L21 and L22 extend in the left-right direction, and are arranged in parallel with an interval in the front-rear direction (inside-outside 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 top edge plate 41 is connected to the upper edge portion of the front 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 edge plate 41 is arranged substantially horizontally.

A front inner wall 21 is connected to the inner edge 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 left-right width of the front inner wall 21 is formed smaller than the left-right width of the front outer wall 11 and the top edge plate 41 (see FIG. 5).
Projecting 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 hole 27 is formed in 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 front inner wall 21 is inclined so as to go from the upper edge to the lower edge and thus approach the front outer wall 11. The lower edge of the front inner wall 21 is pressed against the upper surface of the bottom plate 30.
The cross-sectional shape of the outer wall 11, the top edge plate 41, and the inner wall 21 on the front side is formed in a triangular shape. Thus, the cross-sectional shape of the front wall of the tray 1 is a hollow triangular shape.

  As shown in FIG. 9, a rear inner wall 22 is continuously provided on the upper edge portion of the rear outer wall 12 via two inner and outer corrugator ruled lines L21 and L22. Further, 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 symmetrical with the front outer wall 12, the top edge plate 41, and the inner wall 22.

As shown in FIG. 9, a right inner wall 24 is continuously provided on 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 perpendicularly to the step direction (extending direction of the flute) of the blank sheet S, and are arranged in parallel in the left-right direction (inward and outward directions) at intervals. As shown in FIG. 1, a right top edge plate 41 is formed between the inner and outer corrugator ruled lines L21 and L22.

The front top edge plate 41 is connected to the upper edge portion of the front 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 edge plate 41 is arranged substantially horizontally.

A right inner wall 24 is connected to an inner edge of the top edge plate 41 via an 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 of the front top edge plate 41. The left-right width of the right inner wall 24 is the same as the left-right width of the right outer wall 14 and the top edge plate 41 (see FIG. 5).
At the lower end of the side edge of the right inner wall 24, notches 26, 26 are formed (see FIG. 5). A finger hole 28 is formed in 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 so as to go from the upper edge to the lower edge and thus 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. Thus, the cross-sectional shape of the front wall of the tray 1 is a hollow triangular shape.

  As shown in FIG. 9, a left inner wall 22 is continuously provided on 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 with the right outer wall 14, the top edge plate 41, and the inner wall 24.

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

Next, a method of manufacturing the blank sheet S of the first embodiment will be described.
The tray 1 of the first embodiment is an A-type box type, and a blank sheet S for the tray 1 has a wall portion 10 in which front, rear, left and right outer walls 11 to 14 are arranged in one direction as shown in FIG. Are formed. In addition, on one edge (upper edge) of the wall 10, the respective inner walls 21 to 24 are arranged in one direction. On the other edge (lower edge) of the wall 10, four flaps 31, 32 are arranged in one direction.
Therefore, in the blank sheet S, the boundary between each of the outer walls 11 to 14 and each of the inner walls 21 to 24 is a straight line extending in one direction. In the blank sheet S, the boundary between each of the outer walls 11 to 14 and each of 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 corrugated cardboard is moved in one direction C1, and the sheet S1 is passed through each device in the corrugator 100, so that the sheet S1 is cut into a predetermined shape and ruled lines are formed on the sheet S1. Can be formed. Note that the moving direction (one direction C1) of the sheet S1 is perpendicular to the corrugated direction of the cardboard.

  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 an upper and lower set of first ruled line rollers 111 and 111 and an upper and lower set of second ruled line rollers 112 and 112.
As shown in FIG. 7, irregularities extending in the circumferential direction are formed over the entire outer circumference of the upper and lower first ruled line rollers 111, 111.
When the sheet S1 passes between the upper and lower first ruled line rollers 111, 111 in one direction C1, the irregularities of the outer peripheral surfaces of the two first ruled line rollers 111, 111 are pressed against the outer surface and the inner surface of the sheet S1, and the sheet S1 is pressed. A corrugator ruled line L21 is formed.

  The corrugator ruled line L21 is composed of two grooves L21a, 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, L21a on the outer surface.

As shown in FIG. 6, the upper and lower second ruled line rollers 112, 112 are arranged at intervals from the upper and lower first ruled line rollers 111, 111 in a horizontal direction C2 orthogonal to one direction C1.
The upper and lower second ruled line rollers 112, 112 have the same configuration as the upper and lower first ruled line rollers 111, 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 on the downstream side of the first scorer 110 in the 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, irregularities are formed on the entire outer circumference of the upper and lower third ruled line rollers 113, 113, similarly to the upper and lower first ruled line rollers 111, 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. Is formed, and a corrugator ruled line L22 is formed on the sheet S1.

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

In the corrugator 100 of the first embodiment, since the two scorers 110 and 120 are arranged side by side in the front-rear direction, both the first ruler rollers 111 and 111 of the first scorer 110 and the two third rulers of the second scorer 120 are provided. The rollers 113 are configured so as not to interfere with each other in a 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 horizontal direction C2 orthogonal to one direction, and the two corrugator ruled lines L21, L22 are provided. Can be narrowed.

Next, a procedure for assembling the tray 1 according to the first embodiment will be described.
By joining the joining piece 15 to the inner surface of the front outer wall 11 while bending the blank sheet S shown in FIG. 5 along the ruled lines L1 to L4, the rectangular cylindrical wall portion 10 is formed as shown in FIG.
The tray 1 of the first embodiment has a wall 10 formed at a factory and is delivered to a customer with the wall 10 folded.

When the customer uses the tray 1, first, the wall 10 is formed in a cylindrical shape, and the wall 10 is arranged such that the lower opening is on the upper side (the state of 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, the insertion pieces 32a of the outer flaps 32 are inserted into the mounting holes 31a of the inner flaps 31, 31, respectively.
Thereby, 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.

  Subsequently, as shown in FIG. 9, the wall portion 10 is arranged such that the bottom plate 30 is on the lower side. In FIG. 9, the inner walls 21 to 24 are widely opened outward to make the structure of the tray 1 easily understandable. However, in the actual assembly process, the inner walls 21 to 24 face 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 plates 41, 41 are formed.

  When the left and right inner walls 23 and 24 are folded inward with respect to the left and right outer walls 13 and 14, the engaging pieces 16 are separated from the top edge plate 41, and the engaging pieces 16 protrude from the upper edges of the outer walls 13 and 14. It will be in the state of having done. 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, front and rear top edge plates 41, 41 are formed.
When the front and rear inner walls 21 and 22 are folded 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 cutouts 26 of the left and right inner walls 23 and 24, and the protruding pieces 25 are formed. Is locked in the notch 26.

As shown in FIG. 6, the tray 1 of the first embodiment is a 02 type (A type box) type. Therefore, the corrugator 100 moves the blank sheet S while moving the sheet S1 in one direction C1. Since it can be manufactured, manufacturing efficiency can be improved.
Further, when manufacturing the tray 1, a flexo folder gluer having 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 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 the two ruler rollers 111 and 113 of both scorers 110 and 120 intersect in one direction C1. Interference in the direction C2 can be prevented. Accordingly, the interval between the two ruled line rollers 111 and 113 can be reduced, and the interval between the two corrugator ruled lines L21 and L22 can be reduced.

  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, each of the inner walls 21 to 24 may be folded over each of the outer walls 11 to 14. In this manner, the tray 1 can be easily assembled, and the assembling time can be reduced.

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

When the blank sheet S (see FIG. 5) of the first embodiment is bent at the corrugator ruled lines L21 to L23, all the bent portions can be formed perpendicularly to the step direction. The bent portion can be formed stably without being meandered by being affected by the shape, and the shape of the corner portion can be stabilized. In the tray 1, the cross-sectional shapes of the outer walls 11 to 14, the top edge plate 41, and the inner walls 21 to 24 are triangular, and the top edge plate 41 can be stabilized substantially horizontally.
Furthermore, when a plurality of trays 1 are stacked, the upper and lower trays 1 and 1 can be connected by inserting the engaging pieces 16 of the lower tray 1 into the engaging holes 17 of the upper tray 1.
Therefore, since the strength (load resistance) of the tray 1 in the vertical direction can be increased and the displacement of the upper and lower trays 1 and 1 can be prevented, the plurality of trays 1 can be stably stacked.
Thereby, the number of trays 1 that can be loaded on a transporting means such as a truck can be increased, so that transport costs can be reduced. In addition, since the number of trays 1 that can be stored in a storage space such as a warehouse can be increased, storage costs can be reduced.

As described above, the first embodiment of the present invention has been described, but the present invention is not limited to the first embodiment, and can be appropriately changed without departing from the gist thereof.
As shown in FIG. 1, the wall 10 of the tray 1 according to the first embodiment is formed in a rectangular tube shape in which front, rear, left, and right outer walls 11 to 14 are provided continuously, but the shape of the wall is limited. Instead, it may be formed in a polygonal cylindrical shape such as a hexagon or an octagon.

  Although the bottom plate 30 of the tray 1 of the first embodiment is formed by four flaps 31, 32 as shown in FIG. 2, the number of flaps forming the bottom plate 30 and the connecting means of the flaps are limited. Not something.

  In the tray 1 of the first embodiment, as shown in FIG. 1, the engagement pieces 16 are formed on the upper edges of the left and right outer walls 13 and 14, but are engaged with the upper edges of the front and rear outer walls 11 and 12. A piece may be formed. Alternatively, the engagement pieces and the engagement holes need not be formed on the front, rear, left, and right outer walls 11 to 14.

  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. Are different.

  In the tray 1A of the second embodiment, two partition plates 51, 52 are arranged orthogonally on the upper surface of the bottom plate 30, and the partition 51, 52 partitions the internal space of the tray 1A into four spaces. Have 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.
At the left and right edges of the first partition plate 51, insertion pieces 51a, 51a (see FIG. 11) protrude. Both insertion pieces 51a, 51a are inserted into through holes 23a, 24a (see FIG. 11) formed in 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.
At the center in the left-right direction of the first partition plate 51, a connection slit 51b extends downward from the upper edge.

The second partition plate 52 is a rectangular flat plate extending in the front-rear direction over the front and rear inner walls 21 and 22 (see FIG. 11). The second partition plate 52 is arranged at the center of the bottom plate 30 in the left-right direction.
At the front and rear edges of the second partition plate 52, insertion pieces 52a, 52a (see FIG. 11) protrude. Both insertion pieces 52a, 52a are inserted into through holes 21a, 22a (see FIG. 11) formed in front and rear inner walls 21, 22. 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 at the center of the second partition plate 52 in the front-rear direction.

  The second partition plate 52 is inserted into the connection slit 51b of the first partition plate 51. The first partition wall 51 is inserted into the connecting slit 52b of the second partition plate 52. Thus, 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, each of the outer walls 10 to 14, and each of the inner walls 21 to 24 are assembled as in the tray 1 of the first embodiment (see FIG. 1). Thereafter, the first partition plate 51 is assembled to the left and right inner walls 23, 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 the partition plates is not limited. For example, the internal space can be divided into two by one partition plate. Also, the internal space can be partitioned into a large number by three or more partition plates.

1 tray (first embodiment)
1A tray (second embodiment)
Reference Signs List 10 wall portion 11 front outer wall 12 rear outer wall 13 left outer wall 14 right outer wall 15 joining piece 16 engaging piece 17 engaging hole 21 front inner wall 22 rear inner wall 23 left inner wall 24 right 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

Claims (1)

A method for manufacturing a blank sheet for a tray, comprising:
The blank sheet,
A wall in which a plurality of outer walls are connected 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,
With the corrugator's first scorer and second scorer arranged side by side in the direction of movement of the seat,
A first ruled line roller and the second ruled line roller of said first scorer and placing a third ruled line roller of said second scorer, the shifting in the lateral direction crossing the moving direction of the sheet,
By moving the sheet, by passing the sheet through the first scorer and the second scorer,
By the first crease roller and the third crease roller, two corrugator creases extending in parallel in one direction are formed between the outer wall and the inner wall in the sheet,
Forming a corrugator crease extending in one direction between the outer wall and the flap in the sheet by the second crease roller .

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