Blank board, box formed from it, and box-making method

Abstract

To provide a blank plate, a box obtained by molding the same, and a box-making method that enable fast molding into a box shape with a small number of general robot arms.SOLUTION: A blank plate 100 according to the present disclosure is characterized in that an outer ruled line 11f has larger ruled-line bending strength than an inner ruled line 11e, wherein a side flap 9 has a first projection part 12 which protrudes toward a front side plate 2a, a folded side plate 4 has a second projection part 13 on an outer edge side opposed to an edge side 11f forming a border with an upper end face plate 3, and a bottom plate 1 has an engaging hole part 14. When a left face side plate 11c and a right face side plate 11d are stood and the side flap 9 is folded toward a storage chamber 22 as shown in Fig.3, the first projection part 12 can be locked to the engaging hole part 14, and when the folded side plate 4 is folded toward the storage chamber 22 to stay facing the front face side plate 2a, the second projection part 13 can be locked to the engaging hole part 14.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a blank plate, a box formed therefrom, and a method for manufacturing the same. The box relates to a carton for distribution processing, for example, for beverage products. [Background technology]

[0002] A typical shape of cardboard box is a carton for distribution processing, in which the product insertion section is formed into a cylindrical shape by gluing or the like, and which can be easily formed by simply unfolding the box and inserting the lid into the side opposite the lid. In particular, for gift cartons, a method in which the top end surface of all or some of the sides other than the side where the lid is connected is formed to a predetermined thickness, for example, about 4 to 7 mm, is widely used in a variety of forms depending on the type, number, and arrangement of the products to be contained.

[0003] Forming cardboard boxes for distribution processing and product placement have traditionally been done manually because packaging patterns tend to change over time due to internal product and cultural factors, and mechanization and automation have been difficult in terms of technology, economy, and installation space.

[0004] In recent years, in the field of distribution processing, which requires the production of a variety of products in a small space, a method has been proposed in which robotic arms are used to form boxes and place contents into the formed boxes (see, for example, Patent Document 1 or Patent Document 2). Behind this is a combination of advances in robotics technology, as well as social factors such as labor shortages due to factors such as a declining birthrate and aging population, and demands for continuous high productivity. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2019-93675 A [Patent Document 2] Japanese Patent Application Publication No. 2020-29282 Summary of the Invention [Problem to be solved by the invention]

[0006] Based on past experience, the above-mentioned cardboard boxes were designed on the assumption that a person would manually fold and form a box from a blank sheet, and it was discovered that they would be difficult to form using a robotic arm. This is because when conventional cartons are formed into boxes by hand or using a dedicated machine, the carton is often held down in multiple places with fingers or a rotary single-axis arm, and then folded using the remaining fingers or another single-axis arm, and a typical six-axis robot arm with about two arms and their associated hands cannot form the carton at high speed without folding defects.

[0007] The present disclosure relates to boxes for distribution processing in which the product inlet section is cylindrical, for example, by gluing, and which can be easily formed by simply unfolding the box and inserting the lid into the side opposite the lid, and in which the top end surfaces of all or some of the sides other than the side where the lid is connected are formed to a predetermined thickness, and aims to provide a blank plate, a box formed from the blank plate, and a method for manufacturing the box, which can be formed into a box at high speed using a small number of general robot arms. [Means for solving the problem]

[0008] The present inventors have conducted extensive research and found that the above-mentioned problems can be solved by controlling the relative magnitudes of the bending strengths of two spaced apart ruling lines provided on a blank plate, and by providing protrusions on the side flaps so that they can be inserted into engaging holes in a bottom plate, and have thus completed the present invention. The blank plate according to the present invention is a blank plate for forming a box from a single cardboard sheet, having a rectangular parallelepiped or cubic shape, an opening with one side of the rectangular parallelepiped or cubic shape open, a lid part for closing the opening, and a storage chamber provided inside the rectangular parallelepiped or cubic shape, the blank plate comprising a bottom plate having four edges, a front side plate connected to a first edge of the bottom plate, and The front side plate has a top end plate connected to the edge of the front side plate that faces the first edge and a folded side plate connected to the top end plate, and the rear side plate has a cover plate that becomes the cover portion connected to the edge of the rear side plate that faces the second edge. And, before and a fixing piece extending in a direction adjacent to the left side plate and the right side plate, is before Side flap extending in a direction adjacent to the front side panel P and the left side Board coverage and the right side On the board Each Beforethe bottom plate has an overlapping fold extending obliquely from a corner on the rear side plate side, and each edge is provided with a ruler, the ruler including an inner ruler provided at the boundary between the front side plate and the top end plate and an outer ruler provided at the boundary between the top end plate and the folded-back side plate; the side flaps have a first protrusion protruding toward the front side plate, and the folded-back side plates have a second protrusion on their outer edges opposite the edges that form the boundary with the top end plate; and the bottom plate has an engagement hole, and when the left side plate and the right side plate are erected and the side flaps are folded toward the storage chamber, the first protrusion can be engaged with the engagement hole, and when the folded-back side plate is folded toward the storage chamber and facing the front side plate, the second protrusion can be engaged with the engagement hole. The outer ruling line's ruling line bending strength as defined by JCS T 0001:2000 (Corrugated board - ruling line bending strength test method) is greater than the inner ruling line's ruling line bending strength. It is characterized by:

[0009] The blank plate according to the present invention is a blank plate for forming a box made of a single cardboard sheet, the blank plate having a rectangular parallelepiped or cubic shape, an opening with one side of the rectangular parallelepiped or cubic shape open, a lid portion for closing the opening, and a storage chamber provided inside the rectangular parallelepiped or cubic shape, the blank plate comprising a bottom plate having four edges, a front side plate connected to a first edge of the edges of the bottom plate, and a front side plate connected to the first edge of the edges of the bottom plate. the front side plate has a top end plate connected to an edge of the front side plate that faces the first edge, and a folded side plate connected to the top end plate; the rear side plate has a cover plate that becomes the cover portion connected to an edge of the rear side plate that faces the second edge, and a folded side plate connected to the left side side plate and the right side plate, respectively, the left and right side panels have side flaps extending in a direction adjacent to the front side panel, and the left and right side panels each have overlapping folds extending obliquely from a corner of the bottom panel on the rear side panel side, and each edge is provided with a ruled line, the side flaps have a first protrusion protruding toward the front side panel, and the folded side panel has a first protrusion that forms a boundary with the top end panel. a second protrusion on an outer edge facing the edge of the bottom plate, and the bottom plate has an engaging hole, and when the left side plate and the right side plate are erected and the side flap is folded toward the storage chamber, the first protrusion can be engaged with the engaging hole, and when the folded side plate is folded back toward the storage chamber and faces the front side plate, the second protrusion can be engaged with the engaging hole, and the blank plate has a gap between the first protrusion and the front side plate. The extension of the crease between the bottom plate and the left side plate and the extension of the crease between the bottom plate and the right side plate pass through the gap.In the blank plate according to the present invention, the ruling preferably includes an inner ruling provided at the boundary between the front side panel and the top end panel, and an outer ruling provided at the boundary between the top end panel and the folded side panel. In the blank plate according to the present invention, it is preferable that the ruling line bending strength of the outer ruling line, as defined by JCS T 0001:2000 (Corrugated Board - Rule Line Bending Strength Test Method), is greater than the ruling line bending strength of the inner ruling line.

[0010] In the blank plate of the present invention, the two ruling lines, the inner ruling line and the outer ruling line, form a double ruling line that is parallel to one another, and it is preferable that the distance between the center lines of the ruling lines is 1 to 5 times the thickness of the cardboard sheet in areas other than the ruling lines. In the blank plate of the present invention, it is preferable that the rear side plate further has an insertion piece connected to the cover plate, the left side plate and the right side plate further have upper flaps connected to the edge of the left side plate opposite the third edge and the edge of the right side plate opposite the fourth edge, respectively, and that the overlapping fold is provided across the left side plate and the upper flap, and across the right side plate and the upper flap, respectively.

[0011] In the blank plate according to the present invention, it is preferable that a gap be formed between the first protrusion and the front side plate.

[0012] The box of the present invention is a box molded from the blank plate of the present invention, wherein the fixing pieces are fixed to the inside of the left side panel and the right side panel, respectively, the ruling lines are each valley-folded, and when the left side panel and the right side panel are erected and the side flap is folded toward the storage chamber, the first protrusion is engaged with the engaging hole, and when the folded side panel is folded toward the storage chamber and facing the front side panel, the second protrusion is engaged with the engaging hole, and the side flap is sandwiched between the front side panel and the folded side panel.

[0013] The box-making method according to the present invention comprises the steps of: A blank plate for forming a box made of a single cardboard sheet, the blank plate having a rectangular parallelepiped or cubic shape, an opening with one side of the rectangular parallelepiped or cubic shape open, a lid portion for closing the opening, and a storage chamber provided inside the rectangular parallelepiped or cubic shape, the blank plate comprising a bottom plate having four edges, a front side plate connected to a first edge of the edges of the bottom plate, and a front side plate connected to the first edge of the edges of the bottom plate. the front side plate has a top end plate connected to the edge of the front side plate that faces the first edge and a folded side plate connected to the top end plate; the rear side plate has a cover plate that becomes the cover portion connected to the edge of the rear side plate that faces the second edge and a folded side plate connected to the left side side plate and the right side plate; and fixing pieces extending in adjacent directions, the left side panel and the right side panel have side flaps respectively extending in a direction adjacent to the front side panel, and the left side panel and the right side panel each have overlapping folds extending obliquely from corners of the bottom panel on the rear side panel side, and each edge is provided with a ruling line, the side flaps have a first protrusion protruding toward the front side panel, and the folded-back side panel has a second protrusion on an outer edge opposite an edge that forms a boundary with the top end panel, and the bottom panel has an engaging hole, and when the left side panel and the right side panel are erected and the side flaps are folded toward the storage chamber, the first protrusion can be engaged with the engaging hole, and when the folded-back side panel is folded toward the storage chamber and facing the front side panel, the second protrusion can be engaged with the engaging hole, The blank plate is folded at the overlapping crease with the fixing pieces fixed to the inside of the left side plate and the right side plate, respectively, and the left side plate and the right side plate are folded at the overlapping crease with the fixing pieces fixed to the inside of the left side plate and the right side plate. Board and front The side flaps are sandwiched between the rear side plate, the cover plate connected to the rear side plate, and the bottom plate, and the front side plate connected to the bottom plate. (1) Take out one of the blank plates and place it on the frame. (2) raising the rear side plate and raising the left side plate and the right side plate; (3) folding the side flap toward the storage chamber to engage the first protrusion with the engaging hole; (4) Raise the front side panel; (5) folding the folded side panel inward to engage the second protrusion with the engaging hole, thereby forming the box with the opening open; (6) The box is carried out in this order. In the box manufacturing method according to the present invention, it is preferable that the ruled lines include an inner ruled line provided at the boundary between the front side panel and the top panel and an outer ruled line provided at the boundary between the top panel and the folded-back side panel.In the box manufacturing method according to the present invention, it is preferable that the rear side panel further has an insertion piece connected to the cover panel, the left side panel and the right side panel further have upper flaps connected to an edge of the left side panel facing the third edge and an edge of the right side panel facing the fourth edge, respectively, and the overlapping fold is provided across the left side panel and the upper flap, and across the right side panel and the upper flap, respectively. [Effects of the Invention]

[0014] According to the present disclosure, for boxes for distribution processing in which the product insertion section is cylindrical by gluing or the like and can be easily formed by simply unfolding the box and inserting the lid into the side opposite the lid, and in which the top end surfaces of all or some of the sides other than the side where the lid is connected are formed to a predetermined thickness, it is possible to provide a blank plate, a box formed from the blank plate, and a box manufacturing method for the blank plate, which can be formed into a box at high speed using a small number of general robot arms. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a schematic configuration diagram (schematic development view of a box) of an example of a blank plate according to the present embodiment. FIG. [Figure 2] FIG. 1 is a perspective view showing a schematic configuration of an example of a box according to the present embodiment. [Figure 3] FIG. 3 is a perspective view of the box shown in FIG. 2. [Figure 4] FIG. 2 is a partially enlarged view of a portion designated by reference numeral 90 in FIG. [Figure 5] FIG. 1 is a plan view showing a schematic configuration of a robot arm system that can be used when forming the blank plate of this embodiment into a box using a robot arm. [Figure 6] FIG. 6 is a perspective view of the robot arm system shown in FIG. 5. [Figure 7]FIG. 10 is a diagram illustrating the flow of steps for assembling a box according to the present embodiment, and is an explanatory diagram illustrating a first step. [Figure 8] FIG. 10 is a diagram illustrating the flow of the process for assembling the box according to the present embodiment, and is an explanatory diagram illustrating the second step. [Figure 9] FIG. 10 is a diagram illustrating the flow of the process for assembling the box according to the present embodiment, and is an explanatory diagram illustrating the process of folding the side flaps toward the storage chamber in the third step. [Figure 10] FIG. 10 is a diagram illustrating the flow of the process for assembling the box according to the present embodiment, and is an explanatory diagram illustrating the state in the third step in which the first protrusion is locked into the locking hole. [Figure 11] FIG. 10 is a diagram illustrating the flow of the process for assembling the box according to the present embodiment, and is an explanatory diagram illustrating the fourth step. [Figure 12] FIG. 10 is a diagram illustrating the flow of the process for assembling the box according to the present embodiment, and is an explanatory diagram illustrating the fifth step. [Figure 13] FIG. 10 is a diagram illustrating the flow of the process for assembling the box according to the present embodiment, and is an explanatory diagram illustrating the sixth step. DETAILED DESCRIPTION OF THE INVENTION

[0016] The present invention will be described with reference to the accompanying drawings, but the present invention is not limited to these descriptions. Various modifications may be made to the embodiments as long as the effects of the present invention are achieved.

[0017] First, a blank plate according to this embodiment will be described. As shown in Figures 2 and 3, the blank plate 100 according to this embodiment is a blank plate for forming a box 101 made of a single cardboard sheet, the box 101 having an opening 20 with one side of the rectangular parallelepiped or cubic shape open, a lid 21 closing the opening 20, and a storage chamber 22 provided inside the rectangular parallelepiped or cubic shape. As shown in Figure 1, the blank plate 100 includes a bottom plate 1 having four edges 11a, 11b, 11c, and 11d, and a front side plate 2 connected to a first edge 11a of the bottom plate 1. a rear side panel 2b connected to a second edge 11b of the bottom panel 1 that faces the first edge 11a, and a left side panel 2c and a right side panel 2d connected to the remaining third edge 11c and fourth edge 11d of the bottom panel 1, respectively. The front side panel 2a has an upper end panel 3 connected to an edge 11e that faces the first edge 11a of the front side panel 2a, and a folded side panel 4 connected to the upper end panel 3. The rear side panel 2b has a cover panel 5 that becomes a cover portion 21 connected to an edge 11g that faces the second edge 11b of the rear side panel 2b, and an insertion piece connected to the cover panel 5. The left side panel 2c and the right side panel 2d have upper flaps 8 respectively connected to an edge 11k opposite to the third edge 11c of the left side panel 2c and an edge 11l opposite to the fourth edge 11d of the right side panel 2d, and side flaps 9 respectively extended in a direction adjacent to the front side panel 2a, and overlapping folds 10 extending obliquely from a corner of the bottom panel 1 on the rear side panel 2b side across the left side panel 2c and the upper flap 8 and the right side panel 2d and the upper flap 8, respectively. The side flap 9 has a first protrusion 12 that protrudes toward the front side panel 2a, and the folded side panel 4 has a second protrusion 13 on its outer edge opposite the edge 11f that is the boundary with the upper end panel 3. The bottom panel 1 has a locking hole 14. As shown in FIG. 3, the left side panel 2c and right side plate 2dWhen the side flap 9 is folded toward the storage chamber 22, the first protrusion 12 can be locked in the locking hole 14, and when the folded-back side panel 4 is folded toward the storage chamber 22 and faces the front side panel 2a, the second protrusion 13 can be locked in the locking hole 14. Here, the edges and the ruling lines are in the same position, so they are all given the same reference numeral 11 (11a to 11n).

[0018] The box 101 is assembled using a single cardboard sheet as a blank plate 100. At this time, the box 101 has an external appearance of a rectangular parallelepiped, with the top opening 20 covered by the lid 21, as shown in FIG. 2. As shown in the development view of FIG. 1, when the length of the edge 11a is longer than the length of the edge 11c, the box 101 has a rectangular parallelepiped shape. In this case, the bottom plate 1 has a longitudinal direction 91 and a lateral direction 92. In this embodiment, the length of the edge 11a may be equal to the length of the edge 11c. Furthermore, the heights of the front side plate 2a, the rear side plate 2b, the left side plate 2c, and the right side plate 2d may be equal to the lengths of the edge 11a and the edge 11c. At this time, the box 101 has a cubic shape.

[0019] In an example of a blank panel 100 according to this embodiment shown in FIG. 1, the insertion piece 6, cover panel 5, rear panel 2b, bottom panel 1, front panel 2a, top panel 3, and folded panel 4 are connected in series via ruling lines 11h, 11g, 11b, 11a, 11e, and 11f. Furthermore, fixing pieces 7 are connected to both sides of the rear panel 2b via ruling lines 11i and 11j. The left panel 2c and the right panel 2d are connected to both sides of the bottom panel 1 via ruling lines 11c and 11d. The top flap 8 is connected to the left panel 2c and the right panel 2d via ruling lines 11k and 11l, and the side flap 9 is connected to them via ruling lines 11m and 11n.

[0020] In the blank plate 100 according to this embodiment, the fixing pieces 7 are fixed to the inside of the left side panel 2c and the right side panel 2d by gluing or the like, respectively, and the blank plate 100 is preferably mountain-folded at the overlapping fold 10, and the left side panel 2c, the right side panel 2d, the top flap 8, and the side flap 9 are preferably sandwiched between the rear side panel 2b and the cover panel 5 connected to the rear side panel 2b, and the bottom panel 1 and the front side panel 2a connected to the bottom panel 1. Then, by valley-folding the ruling lines 11 (11a to 11n) in the development view shown in Fig. 1, the blank plate 100 can be formed into the box 101 shown in Fig. 2.

[0021] FIG. 4 is a partially enlarged view of the portion designated by the reference numeral 90 in FIG. 1. As shown in FIG. 4, the first protrusion 12 is a portion that protrudes from the outer edge of the side flap 9 on the front side panel 2a side. The protrusion amount h1 of the first protrusion 12 is preferably 0.5 to 3.5 mm, more preferably 1.5 to 2.5 mm. If the protrusion amount h1 is less than 0.5 mm, the first protrusion 12 may not be easily engaged with the engaging hole 14. If the protrusion amount h1 exceeds 3.5 mm, the first protrusion 12 may be caught on the front side panel 2a and deformed when the left side panel 2c and the right side panel 2d are erected and the side flap 9 is folded toward the storage chamber 22. Furthermore, in the blank plate 100 according to this embodiment, as shown in FIG. 4, a gap s is preferably formed between the first protrusion 12 and the front side panel 2a. The gap s is preferably 0.5 to 4.0 mm, more preferably 1.0 to 3.0 mm. If the gap s is less than 0.5 mm, When the left side plate 2c and the right side plate 2d are erected and the side flap 9 is folded toward the storage chamber 22, the first protrusion 12 is caught by the front side plate 2a and deformed. If the gap exceeds 4.0 mm, The first protrusion 12 becomes difficult to lock into the locking hole 14. When blank plate 100 is produced by punching, gap s is preferably provided by using separate blades to cut the contour lines of front side panel 2a and first protrusion 12. This allows adjacent front side panels 2a and first protrusion 12 to be punched out with two blades, and gap s can be provided between front side panel 2a and first protrusion 12.

[0022] As shown in FIG. 1 , the second protrusion 13 protrudes from the outer edge of the folded side panel 4, opposite the edge 11f that defines the boundary between the folded side panel 4 and the upper end panel 3. The protrusion amount h2 of the second protrusion 13 is preferably 0.5 to 4.5 mm, and more preferably 1.0 to 4.0 mm. If the protrusion amount h2 is less than 0.5 mm, the second protrusion 13 may not be easily engaged with the engaging hole 14. If the protrusion amount h2 exceeds 4.5 mm, the second protrusion 13 may be caught on the bottom panel 1 and deformed when the folded side panel 4 is folded back toward the storage chamber 22 to face the front side panel 2a. Furthermore, when the cartons are stacked on a pallet, the second protrusion 13 may leave stacking indentations on the underlying carton or damage the underlying carton during transport.

[0023] The engaging hole 14 is provided in the bottom plate 1. At this time, the engaging hole 14 is provided in the left side plate 1 as shown in FIG. 2c and right side plate 2d The locking hole 14 is provided at a position where it can lock the first protrusion 12 when the side flap 9 is folded toward the storage chamber 22 and the first protrusion 12 can be locked, and when the folded-back side panel 4 is folded toward the storage chamber 22 and faces the front side panel 2a, the locking hole 14 can lock the second protrusion 13. In FIG. 1, the locking hole 14 is provided at a position where it contacts the first edge 11a of the bottom plate 1. As shown in FIG. 1, the locking hole 14 may be capable of locking both the first protrusion 12 and the second protrusion 13, or a locking hole capable of locking the first protrusion 12 and a locking hole capable of locking the second protrusion 13 may be provided separately (not shown).

[0024] As shown in FIG. 3, the first protrusion 12 is 2c and right side plate 2d1 shows a state in which the second protrusion 13 is engaged with the engaging hole 14 when the side flap 9 is folded toward the storage chamber 22 and the second protrusion 13 is engaged with the engaging hole 14 when the folded-back side panel 4 is folded toward the storage chamber 22 and faces the front side panel 2a. In this engaged state, it is no longer necessary to perform the operation of folding in the folded-back side panel 4 while continuing to hold the side flap 9 in place with fingers or a robot arm, and the folded-back side panel 4 can be folded in without the operation of fixing the side flap 9. Box-making can be done using a robot arm system with as few as two or three robot arms.

[0025] It is preferable that the front side panel 2a and the folded side panel 4 are folded perpendicular to the grain direction (paper width direction) of the carton, so that the second protrusion 13 can easily enter the engagement hole 14 of the bottom panel 1.

[0026] Preferably, the two rule lines, the inner rule line 11e and the outer rule line 11f, form a parallel double rule line as shown in Fig. 1. When this double rule line is valley-folded based on the unfolded state of the blank sheet shown in Fig. 1, the top panel 3 forms the top end surface of the front side panel 2a of the box, as shown in Figs. 2 and 3. Here, the distance t between the center lines of the rule lines in the double rule line is preferably 1 to 5 times the thickness of the cardboard sheet other than the rule lines, and more preferably 2 to 3.5 times. This enhances the luxurious feel of the gift box. If the distance between the center lines of the rule lines is less than 1 time, the top panel 3 or the top end surface of the box side wall formed by the top panel 3 will be crushed to narrow its width. On the other hand, if the distance between the center lines of the ruling lines exceeds five times, the width of the upper end panel 3 or the upper end face of the box side wall formed by the upper end panel 3 becomes too large, which tends to spoil the aesthetic appearance of the box and also tends to make the folded side panel 4 tilt and stand upright, reducing stability. When the width of the upper end panel 3 of the box side wall is the distance between the double ruling lines, it is preferable that the distance be, for example, 4 to 7 mm.

[0027] In this embodiment, the score lines are preferably formed in a groove-like shape by, for example, embossing one surface of the corrugated board in a linear convex shape. In this case, the surface of the corrugated board that is not embossed remains flat. Alternatively, the score lines may be formed in a groove-like shape by embossing one surface of the corrugated board in a linear convex shape and simultaneously embossing the other surface (opposite surface) in a linear concave shape that matches the convex embossing. Alternatively, the score lines may be formed in a groove-like shape by embossing one surface of the corrugated board in a linear convex shape and simultaneously embossing the other surface (opposite surface) in a linear convex shape that matches the convex embossing. In these cases, grooves are formed facing each other on both the front and back surfaces. The score lines may not only be in the form of a continuous groove-like shape, but also in the form of a groove-like shape arranged in a dashed line.

[0028] In the blank plate 100 according to this embodiment, the bending strength of the outer score line 11f, as defined by JCS T 0001:2000 (Corrugated Board - Test Method for Bending Strength of Scoring Line), is preferably greater than the bending strength of the inner score line 11e. Here, the difference between the bending strength of the outer score line 11f and the bending strength of the inner score line 11e is preferably 10 to 250 mN, and more preferably 100 to 200 mN. By making the bending strength of the outer score line 11f greater than the bending strength of the inner score line 11e, the second protrusion 13 can more easily enter the engaging hole 14 when the side panel 4 is folded back by a robot arm.

[0029] The fact that the bending strength of the outer ruling line 11f is greater than that of the inner ruling line 11e specifically means that the inner ruling line 11e is easier to bend than the outer ruling line 11f. Specific means for varying the bending strength in this way include, for example, the following: (1) making the depth of the inner ruling line 11e deeper than that of the outer ruling line 11f, (2) making the thickness of the inner ruling line 11e greater than that of the outer ruling line 11f, (3) alternating ruling lines and cuts for the inner ruling line 11e, and only ruling lines or reducing the cut portion for the outer ruling line 11f, (4) leaving the front liner of the cardboard for the inner ruling line 11e and cutting only the back liner and the core, resulting in a half cut, and only ruling lines or reducing the half cut portion for the outer ruling line 11f, etc.

[0030] Because the strength of double-sided creases is generally difficult to control, when first folding one side and then the other, it becomes difficult to ensure a nearly right-angle bend along each of the two lines during the forming process. As a result, when performing the process manually, the double-sided crease on the adjacent side wall must be folded while maintaining the nearly right-angle fold with multiple fingers depending on the degree of distortion. While such diverse and complex finger manipulations can be accommodated by increasing the number of robotic arms, unless boxes are formed using preferably three or fewer robotic arms, and more preferably two or fewer, the complex control and large size of the device make it unattractive in terms of operational stability (e.g., the ability to replace manual labor), compactness of usage space, and economic viability. The same applies when special functions, such as image diagnostic capabilities, are added to the robotic arm hands. In the blank sheet 100 according to this embodiment, it is preferable to have the above-mentioned relationship between the bending strength of the outer score line 11f and the bending strength of the inner score line 11e, and second protrusions 13 are provided on the folded-back side panels 4 in the longitudinal direction 91, and engaging holes 14 are provided on the bottom panel 1. This eliminates the need to hold the shape of the box side walls in place with fingers or a robot arm while folding in the other side walls, and allows the robot arm to easily fold in each side wall.

[0031] When the blank plate 100 of this embodiment is boxed and then unfolded again, if the bending strength of the outer ruling line 11f of the blank plate is greater than the bending strength of the inner ruling line 11e, then even after unfolding again, although the value of the bending strength of the ruling line decreases, this magnitude relationship is often maintained.

[0032] The blank plate 100 according to this embodiment may have a locking mechanism for the lid portion 21. For example, as shown in Fig. 1, the locking mechanism has a locking piece 15 provided on the front side plate 2a and a locking hole 16 provided at the boundary between the lid plate 5 and the insertion piece 6, and when the box 101 is assembled as shown in Figs. 2 and 3, the locking piece 15 can be inserted into the locking hole 16 when the lid portion 21 is closed.

[0033] Instead of the upper flap 8, the blank plate 100 according to this embodiment may have a top panel and a folded-over side panel connected to the left side panel 2c and the right side panel 2d, similar to the front side panel 2a. During box making, the folded-over side panel is folded back toward the storage chamber 22 to face the left side panel 2c and the right side panel 2d, and the top panel forms the upper end surfaces of the left side panel 2c and the right side panel 2d. This enhances the luxurious feel of the gift box.

[0034] Next, a box 101 formed from the blank plate according to this embodiment will be described with reference to Figures 2 and 3. The box 101 according to this embodiment is a box formed from the blank plate 100 (shown in Figure 1) according to this embodiment, in which the fixing pieces 7 are fixed to the inside of the left side panel 2c and the right side panel 2d, respectively, the ruling lines 11 (11a to 11n) are each valley-folded, and when the left side panel 2c and the right side panel 2d are erected and the side flap 9 is folded toward the storage chamber 22, the first protrusion 12 is engaged with the engaging hole 14, and when the folded side panel 4 is folded toward the storage chamber 22 and faces the front side panel 2a, the second protrusion 13 is engaged with the engaging hole 14, and the side flap 9 is sandwiched between the front side panel 2a and the folded side panel 4.

[0035] The material of the box 101 is not particularly limited, but paper, particularly cardboard, is preferred. When the box 101 according to this embodiment is formed, the product placed inside is not particularly limited, but a glass container, metal container, or plastic container filled with a beverage is preferred. Instead of a container, a small box or an item other than a beverage may also be placed inside. The thickness of the box 101 is preferably 1 to 7 mm, and more preferably 1.5 to 5 mm.

[0036] Next, a box manufacturing method according to this embodiment will be described with reference to Figures 5 to 12. In the box manufacturing method according to this embodiment, the blank plate 100 according to this embodiment is folded at the overlapping crease 10 with the fixing pieces 7 fixed to the inside of the left side plate 2c and the right side plate 2d, respectively, and the left side plate 2c, the right side plate 2d, the top flap 8, and the side flap 9 are sandwiched between the rear side plate 2b and the cover plate 5 connected to the rear side plate 2b, and the bottom plate 1 and the front side plate 2a connected to the bottom plate 1, and a robot arm is used to (1) Take out one of the blank plates 100 and place it on a frame. (2) Raise the rear side plate 2b, the left side plate 2c and the right side plate 2d, (3) Fold the side flap 9 toward the storage chamber 22 to engage the first protrusion 12 with the engagement hole 14; (4) Raise the front side panel 2a. (5) The side panels 4 are folded inward to engage the second protrusions 13 with the engaging holes 14, thereby forming the box 101 with the opening 20 open. (6) Carry out the box 101.

[0037] As shown in Fig. 5, two robot arms 41 are suspended from the top plate of the robot arm system 40. There are no particular restrictions on the specifications of the robot arms 41, but a general-purpose six-axis robot arm is preferred. A frame 42 is fixed to the middle plate of the robot arm system 40.

[0038] (1st step) In the first step, one blank sheet 100 according to this embodiment is removed from a carton rack as shown in Fig. 7. The blank sheet 100 is preferably removed by suction. Next, the blank sheet 100 is placed on a frame 42 as shown in Fig. 8.

[0039] (2nd process) In the second step, as shown in Fig. 8, the blank plate 100 is pushed into the frame 42 to erect the rear side plate 2b, and the left side plate 2c and right side plate 2d are also erected. Here, it is preferable to erect the rear side plate 2b by lifting the robot arm while continuing to suck the blank plate 100 from the first step. In the blank plate 100, the fixing pieces 7 (shown in Fig. 1) connected to the rear side plate 2b are fixed to the inside of the left side plate 2c and the right side plate 2d, respectively, so that when the rear side plate 2b is erected, the left side plate 2c and the right side plate 2d are automatically erected.

[0040] (3rd step) In the third step, first, the side flaps 9 are folded toward the storage chamber, as shown in Fig. 9. This causes the first protrusions 12 (shown in Fig. 1) to engage with the engaging holes 14 (shown in Fig. 1). As a result, as shown in Fig. 10, the side flaps 9 are fixed in place even if the robot arm does not continue to hold the side flaps 9.

[0041] (4th step) In the fourth step, as shown in FIG. 11, the front side plate 2a is raised.

[0042] (5th step) In the fifth step, as shown in Fig. 12, the folded side panel 4 (shown in Fig. 1) is folded inward. This causes the second protrusion 13 (shown in Fig. 1) to engage with the engagement hole 14 (shown in Fig. 1). At this time, by making the bending strength of the outer ruling line 11f greater than that of the inner ruling line 11e, the inner ruling line 11e bends before the outer ruling line 11f, thereby ensuring the width of the upper end panel 3 and maintaining the aesthetic appearance of the box. In addition, the second protrusion 13 can be reliably engaged with the engagement hole 14.

[0043] (6th step) In a sixth step, as shown in Fig. 13, the box 101 is carried out by the robot arm 41. Here, the box 101 is preferably carried out by suction.

[0044] 13, in the sixth step, the box 101 is preferably carried out with the opening 20 (shown in FIG. 2) open. The box can proceed directly to the next step of packing the product without performing the step of opening the lid 21 (shown in FIG. 2). [Explanation of symbols]

[0045] 1 Bottom plate 2a Front side plate 2b Rear side plate 2c Left side plate 2d Right side plate 3 Upper end face plate 4 Folded side panels 5 Lid plate 6 Insert 7 Fixed piece 8 Upper flap 9 Side flap 10 Polymerization fold 11 (11a~11n) Margin, line 11a First margin 11b Second margin 11c Third margin 11d Fourth margin 11e Inner ruled line 11f outer ruled line 12 First protrusion 13 Second protrusion 14. Hook-up hole 15 Lock piece 16 Lock hole 20 Opening 21 Lid 22 Containment Room 40 Robot Arm System 41 Robot Arm 42 slots 100 blank boards 101 boxes

Claims

1. A blank plate for forming a box from a single cardboard sheet, the blank plate having a rectangular parallelepiped or cubic shape, an opening with one side of the rectangular parallelepiped or cubic shape open, a lid portion for closing the opening, and a storage chamber provided inside the rectangular parallelepiped or cubic shape, The blank plate has a bottom plate having four edges, a front side plate connected to a first edge of the edges of the bottom plate, a rear side plate connected to a second edge of the edges of the bottom plate opposite the first edge, and a left side plate and a right side plate connected to the remaining third and fourth edges of the edges of the bottom plate, respectively. the front side panel has an upper end panel connected to an edge of the front side panel opposite the first edge, and a folded side panel connected to the upper end panel, the rear side plate includes a cover plate that serves as the cover portion and is connected to an edge of the rear side plate that faces the second edge, and fixing pieces that extend in directions adjacent to the left side plate and the right side plate, respectively; the left side panel and the right side panel each have a side flap extending in a direction adjacent to the front side panel, and the left side panel and the right side panel each have an overlapping fold extending obliquely from a corner of the bottom panel on the rear side panel side, and a marking line is provided on each edge, the marking line including an inner marking line provided at the boundary between the front side panel and the top end panel, and an outer marking line provided at the boundary between the top end panel and the folded side panel; The side flap has a first protrusion that protrudes toward the front side plate, and The folded side plate has a second protrusion on an outer edge opposite to an edge that forms a boundary with the upper end plate, and The bottom plate has an engaging hole portion, When the left side panel and the right side panel are erected and the side flap is folded toward the storage chamber, the first protrusion can be engaged with the engaging hole, and When the folded side plate is folded toward the storage chamber and faces the front side plate, the second protrusion can be engaged with the engaging hole, A blank board characterized in that the outer ruling line has a ruling line bending strength defined by JCS T 0001:2000 (Corrugated cardboard - ruling line bending strength test method) that is greater than the ruling line bending strength of the inner ruling line.

2. A blank plate for forming a box from a single cardboard sheet, the blank plate having a rectangular parallelepiped or cubic shape, an opening with one side of the rectangular parallelepiped or cubic shape open, a lid portion for closing the opening, and a storage chamber provided inside the rectangular parallelepiped or cubic shape, The blank plate has a bottom plate having four edges, a front side plate connected to a first edge of the edges of the bottom plate, a rear side plate connected to a second edge of the edges of the bottom plate opposite the first edge, and a left side plate and a right side plate connected to the remaining third and fourth edges of the edges of the bottom plate, respectively. the front side panel has an upper end panel connected to an edge of the front side panel opposite the first edge, and a folded side panel connected to the upper end panel, the rear side plate includes a cover plate that serves as the cover portion and is connected to an edge of the rear side plate that faces the second edge, and fixing pieces that extend in directions adjacent to the left side plate and the right side plate, respectively; the left side panel and the right side panel each have a side flap extending in a direction adjacent to the front side panel, and the left side panel and the right side panel each have an overlapping fold extending obliquely from a corner of the bottom panel on the rear side panel side, and each of the edges is provided with a ruling line; The side flap has a first protrusion that protrudes toward the front side plate, and The folded side plate has a second protrusion on an outer edge opposite to an edge that forms a boundary with the upper end plate, and The bottom plate has an engaging hole portion, When the left side panel and the right side panel are erected and the side flap is folded toward the storage chamber, the first protrusion can be engaged with the engaging hole, and When the folded side plate is folded toward the storage chamber and faces the front side plate, the second protrusion can be engaged with the engaging hole, the blank plate has a gap between the first protrusion and the front side plate, A blank plate characterized in that an extension of the crease between the bottom plate and the left side plate and an extension of the crease between the bottom plate and the right side plate pass through the gap.

3. A blank plate as described in Claim 2, characterized in that the grid lines include an inner grid line provided at the boundary between the front side panel and the upper end panel, and an outer grid line provided at the boundary between the upper end panel and the folded side panel.

4. The blank sheet according to claim 3, characterized in that the outer ruling line has a ruling line bending strength defined by JCS T 0001:2000 (Corrugated Board - Ruling Line Bending Strength Test Method) that is greater than the ruling line bending strength of the inner ruling line.

5. the two ruling lines, the inner ruling line and the outer ruling line, form a double ruling line in a parallel relationship; 5. A blank plate according to claim 1, 3 or 4, wherein the distance between the center lines of the ruling lines is 1 to 5 times the thickness of the cardboard sheet at the portions other than the ruling lines.

6. The rear side plate further has an insertion piece connected to the cover plate, the left side panel and the right side panel further include upper flaps respectively connected to an edge of the left side panel facing the third edge and an edge of the right side panel facing the fourth edge, 3. The blank plate according to claim 1, wherein the overlapping fold is provided across the left side panel and the upper flap, and across the right side panel and the upper flap.

7. 3. The blank plate according to claim 1, wherein a gap is provided between the first protrusion and the front side plate.

8. A box formed from the blank plate according to any one of claims 1 to 7, the fixing pieces are fixed to the inside of the left side plate and the right side plate, Each of the ruled lines is valley-folded, When the left side plate and the right side plate are erected and the side flap is folded toward the storage chamber, the first protrusion is engaged with the engaging hole, When the folded side plate is folded toward the storage chamber and faces the front side plate, the second protrusion is engaged with the engaging hole, and The box is characterized in that the side flaps are sandwiched between the front side panel and the folded side panel.

9. A blank plate for forming a box from a single cardboard sheet, having a rectangular or cubic shape, an opening with one side of the rectangular or cubic shape open, a lid for closing the opening, and a storage chamber provided inside the rectangular or cubic shape, The blank plate has a bottom plate having four edges, a front side plate connected to a first edge of the edges of the bottom plate, a rear side plate connected to a second edge of the edges of the bottom plate opposite the first edge, and a left side plate and a right side plate connected to the remaining third and fourth edges of the edges of the bottom plate, respectively. the front side panel has an upper end panel connected to an edge of the front side panel opposite the first edge, and a folded side panel connected to the upper end panel, the rear side plate includes a cover plate that serves as the cover portion and is connected to an edge of the rear side plate that faces the second edge, and fixing pieces that extend in directions adjacent to the left side plate and the right side plate, respectively; the left side panel and the right side panel each have a side flap extending in a direction adjacent to the front side panel, and the left side panel and the right side panel each have an overlapping fold extending obliquely from a corner of the bottom panel on the rear side panel side, and each of the edges is provided with a ruling line; The side flap has a first protrusion that protrudes toward the front side plate, and The folded side plate has a second protrusion on an outer edge opposite to an edge that forms a boundary with the upper end plate, and The bottom plate has an engaging hole portion, When the left side panel and the right side panel are erected and the side flap is folded toward the storage chamber, the first protrusion can be engaged with the engaging hole, and When the folded side plate is folded toward the storage chamber and faces the front side plate, the second protrusion can be engaged with the engaging hole, the blank plate is folded at the overlapping fold with the fixing pieces fixed to the inside of the left side plate and the right side plate, respectively, and the left side plate, the right side plate and the side flaps are sandwiched between the rear side plate, the cover plate connected to the rear side plate, and the bottom plate and the front side plate connected to the bottom plate, Using a robotic arm, (1) Take out one of the blank plates and place it on a frame. (2) raising the rear side plate and raising the left side plate and the right side plate; (3) folding the side flap toward the storage chamber to engage the first protrusion with the engaging hole; (4) Raising the front side panel; (5) The folded side plate is folded inward to engage the second protrusion with the engaging hole, thereby forming the box with the opening open. (6) The box is carried out.

10. A box manufacturing method as described in Claim 9, characterized in that the grid lines include an inner grid line provided at the boundary between the front side panel and the upper end panel, and an outer grid line provided at the boundary between the upper end panel and the folded side panel.

11. The rear side plate further has an insertion piece connected to the cover plate, the left side panel and the right side panel further include upper flaps respectively connected to an edge of the left side panel facing the third edge and an edge of the right side panel facing the fourth edge, 11. The box manufacturing method according to claim 9, wherein the overlapping fold is provided across the left side panel and the top flap, and across the right side panel and the top flap.

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