JP4808582B2 - Corrugated board manufacturing method - Google Patents

Description

  The present invention relates to a method for manufacturing a corrugated board bag, and more particularly to a method for manufacturing a cardboard box having a chamfered shape on the outer shape of a rectangular lid.

In general, a long box-like shape surrounded by a rectangular plate is widely known. This type of scissors is formed in a box shape by combining a scissors body and a lid, and is often chamfered with a constant width along the upper outer edge of the rectangular lid.
For example, as shown in FIG. 21, the conventional scissors 1 is placed so that the chamfered lid 3 can be opened above the scissors body 2. The lid 3 is arranged such that the end plate 3b faces the vertical direction of the rectangular top plate 3a and the side plate 3c faces the lateral direction, and is inclined at a constant width from the four-sided outer end of the top plate 3a to the upper end of the end plate 3b and the side plate 3c. Chamfer plates 3d and 3e are provided.

  When manufacturing a claw having such a chamfered shape, in the conventional wooden claw, the top plate 3a, the end plate 3b, the side plate 3c, and the chamfered plates 3d and 3e, which are parts of the lid 3, are separately provided with appropriate dimensions. Produced and joined together to form a box.

On the other hand, recently, in addition to wood, corrugated board reinforced by special processing may be used as a material for the straw, and the chamfered shape similar to the above is also adopted in such corrugated board.
For example, when the lid 3 having the shape shown in FIG. 21 is manufactured using a corrugated board, as shown in FIG. 22, the top board 3a, the wive board 3b, the side board 3c, and the chamfered boards 3d and 3e are arranged on one corrugated board P0. The vertical V grooves y1 and y2 and the horizontal V grooves x1 and x2 are formed at the boundaries (folds) of the respective plates. Then, the corrugated board P0 is bent along the vertical V-grooves y1 and y2 and the horizontal V-grooves x1 and x2, and the end surfaces of these boards are bonded to complete the lid 3.

According to such a corrugated board manufacturing method, since the unfolded state of the top plate 3a, the end plate 3b, the side plate 3c, and the chamfered plates 3d, 3e is integrally formed with one corrugated board P0, the number of steps is small, The assembly work of the lid 3 can be performed easily.
Patent Documents 1 and 2 disclose similar corrugated board manufacturing methods.

JP-A-9-276346 Utility Model Registration No. 3036027

However, in such a conventional corrugated board manufacturing method, when the corrugated board P0 is processed, the shape of the end faces (joints) at the four corners becomes complicated due to the presence of the chamfered boards 3d and 3e. It takes time for processing. In the example of FIG. 22, the vertical V-groove y1 and the horizontal V-groove x1 surrounding the top plate 3a are adjacent to each other after being stopped at an accurate position without protruding outward at the intersection of the V-grooves. An acute notch must be formed between the chamfered plates 3d and 3e, and inclined surfaces in different directions must be formed at the joints of the plates.
For this reason, at the actual site, it is difficult to finish the four corners of the corrugated board P0 by mechanical processing with a cutting machine or the like, and the current situation depends on manual work.

  The present invention has been made in view of such a current situation, and provides a method for manufacturing a corrugated cardboard bowl that facilitates machining of the four corners of a corrugated board including a chamfered board with a machine such as a cutting machine, and increases production efficiency. The purpose is to do.

[First invention]
The manufacturing method of the corrugated board bag of the present invention for solving the above-mentioned problem is
A rectangular top plate,
A pair of end plates facing the longitudinal direction of the top plate;
A pair of side plates facing the lateral direction of the top plate;
A method for producing a corrugated board having a chamfered plate that is inclined at a constant width from the four-side outer edges of the top plate to the upper end of the end plate and the side plate,
A. Preparing a rectangular corrugated board having the following vertical and horizontal dimensions;
Vertical dimension: vertical width of the top plate + (height of the end plate × 2) + (plate width of the chamfered plate × 2),
Horizontal dimension: width of the top plate + (height of the side plate × 2) + (plate width of the chamfered plate × 2).
B. Forming a V-groove shown in the following B1 to B4 on the plate surface of the corrugated board,
B1: A pair of first vertical V-grooves that extend in the vertical direction while maintaining the horizontal width of the top plate and leaving the width of the chamfered plate and the side plate at the left and right ends of the corrugated board
B2: A pair of second vertical V grooves extending in the vertical direction while maintaining the width of the chamfered plate on the left and right outer sides of the pair of first vertical V grooves and leaving the width of the side plate at the left and right ends of the corrugated board. ,
B3: A pair of first horizontal V-grooves that extend in the horizontal direction while maintaining the vertical width of the top plate and leaving the width of the chamfered plate and the end plate at the upper and lower ends of the corrugated board
B4: A pair of second horizontal V-grooves that extend in the lateral direction while maintaining the width of the chamfered plate on the upper and lower sides of the pair of first horizontal V-grooves and leaving the width of the face plate at the upper and lower ends of the corrugated board .
C. The rectangular pieces at the four corners of the corrugated board defined by the pair of first vertical V grooves and the pair of first horizontal V grooves are center lines of the first vertical V groove and the first horizontal V groove. Cutting and removing along,
D. A step of folding the corrugated board from which the rectangular pieces have been removed in the step C along the V-grooves of the step B and assembling them into a box shape;
E. Producing four equally-shaped corner members according to the open spaces at the four corners of the box assembled by the step D;
F. The four corner members are fitted into the open spaces at the four corners and bonded to the end faces of the chamfered plate, the end plate and the side plate.

  According to such a configuration, when the vertical V-groove and the horizontal V-groove are formed in the fold of the corrugated board including the chamfered plate, the four corner portions defined by the extension lines of these V-grooves are separated as rectangular pieces. For this reason, it is possible to easily process the four corners of the corrugated board using a cutting machine for V-groove processing. Also, when manufacturing the corner members at the four corners, it is only necessary to form a relatively simple shape by machining, so that the work load can be reduced.

  In other words, when manufacturing a corrugated cardboard bowl having a chamfered shape, the present invention forms the main body part excluding the four corner parts by bending a rectangular corrugated cardboard and manufacturing the four corner parts which are difficult to process the corrugated board as separate parts. To do. This makes it possible to efficiently manufacture a corrugated board having a chamfered shape by a combination of simple processing.

  In the present invention, as a means for forming the V-groove in the corrugated board in the step B, a conventionally known cutting machine equipped with a rotary blade for V-groove machining can be used. The order in which the V grooves shown in B1 to B4 are processed is not particularly limited, and a plurality of V grooves extending in the same direction among these V grooves may be cut simultaneously. In the process B, since it is not necessary to move the rotating blade linearly from end to end of the corrugated board and stop at a specific position when performing V groove processing, the work of simultaneously processing a plurality of V grooves is extremely simple. become.

The square member in Step E can be produced by an existing molding machine or cutting machine. As the material of the corner member, a material that can be easily bonded to the corrugated board, such as a resin (including a foam material), wood, paper, or the like is used. For example, the four corner members can be manufactured relatively easily by molding a molding material such as resin with the same mold, or by cutting resin, wood, paper, or the like. Since the four corners of the heel require only a small amount of material compared to other parts, even if the corner member is made of resin or wood, these materials need only be used in small amounts. As a result, the characteristics of the corrugated cardboard material that is easy to burn, lightweight, and easy to transport are not impaired.
Further, as shown in the second and third inventions to be described later, the corner member can also be produced by cutting a corrugated board.

The shape of the corner member may be the same shape as the four corners of the ridge 1 shown in FIG. 21, or may be a shape obtained by taking the corner of FIG. 21 as a flat surface or a shape obtained by rounding the corner with a curved surface.
The bonding surface of the corner member bonded to the box in the step D is a surface that matches the end surfaces (joint surfaces) of the adjacent plates without any backlash or steps.

  Regarding the steps D to F, the order of these steps is not particularly limited, and it is only necessary that the corner members are finally fixed in the open spaces at the four corners in a state where the corrugated board is assembled. For example, before assembling the corrugated board in the step D, the square members prepared in advance are partially bonded to the corresponding portions of the four corners of the corrugated board, and the remaining portions correspond to the four corners when the corrugated board is assembled. You may make it adhere | attach to a location.

  Regarding the finishing of the corrugated paper basket after performing the steps A to F, it is desirable to decorate the corrugated paper surface with cloth or the like. By hiding the joints of the corner members with such a decorative material, the appearance of the corrugated cardboard can be finished without any difference from conventional corrugations.

[Second invention]
According to a second aspect of the present invention, there is provided a corrugated board manufacturing method according to the first aspect, wherein the square member of the step E is formed by cutting a corrugated board so that the outer shape viewed from the plane direction of the corrugated board is square. The configuration is as follows.

  According to such a configuration, a corrugated cardboard box having a rectangular shape when viewed from the plane direction, that is, a corrugated cardboard box having an outer shape shown in FIG. 21, can be easily manufactured at a low cost by cutting the cardboard board. In addition, the overall texture including the four corners of the cardboard box is unified, and the appearance is also improved.

[Third invention]
According to a third aspect of the present invention, there is provided a corrugated board manufacturing method according to the first aspect, wherein the square member of the step E is formed by cutting a corrugated board so that the outer shape viewed from the plane direction of the corrugated board is an octagon. The configuration is as follows.

  According to such a configuration, an octagonal corrugated cardboard cage when viewed from the plane direction, that is, a corrugated cardboard cage having the outer shape shown in FIG. Easy to manufacture. Further, as in the second invention, the entire texture including the four corners of the cardboard box is unified, and the appearance is also improved. Furthermore, in the third invention, the number of surfaces constituting the appearance of the corrugated board bag increases, and the high-class feeling of the bag can be enhanced.

[Fourth Invention]
The manufacturing method of the corrugated board bag by 4th invention set it as the structure which provides the folding plate bent along the W groove | channel of the said corrugated board in the lower end part of the said end plate and the said side board in the said 1st-3rd invention.

  According to such a manufacturing method, when the corrugated board is folded twice along the W groove of the corrugated board, a folded portion having a thickness twice as large as that of the corrugated board is formed at the lower ends of the end plate and the side plate. Thereby, since the strength of the end portions of the end plate and the side plate is increased, it is possible to manufacture a corrugated cardboard bag having excellent durability that is not easily broken or deformed.

  In the fourth invention, the W groove means that two V grooves are formed adjacent to each other in the groove width direction. The groove angle of the W groove needs to make the sum of the groove angles of two adjacent V grooves 180 ° in order to fold back the plate surfaces of the end plate and the side plate.

  In the manufacturing method of the fourth invention, the vertical and horizontal dimensions of the corrugated board are increased by the length of the width of the folded W groove and the width of the folded plate. For this reason, the vertical dimension and the horizontal dimension of the step A include the width of the folded W groove and the width of the folded plate.

[First to Fourth Inventions]
The manufacturing method of the present invention can be applied to a corrugated board having a chamfered plate having a uniform width on four sides of a rectangular plate surface. Usually, it is assumed that it is applied to the lid portion of the corrugated cardboard basket. However, as long as it has a similar chamfered shape, the manufacturing method of the present invention can be applied to the bag main body. Moreover, the use (personal use, pet use, etc.) and the type (sleeper, sitting down etc.) of the cardboard basket are not particularly limited.

  In addition, the 1st-4th invention may be applied independently, and can also apply combining these inventions as needed. Further, the first to fourth inventions may be combined with other inventions described in this specification.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. This embodiment is an example in which the present invention is applied to a lid of a cardboard box. In the following description, the “planar quadrangular type” means that the appearance of the corrugated board is viewed from the plane direction is a quadrangle, and the “planar octagon type” means that the appearance viewed from the same direction is an octagon.

[First Embodiment: Planar Square Type]
1 to 3 show a plane square type corrugated cardboard cage 10.
As shown in FIG. 1, the corrugated cardboard basket 10 is a combination of a basket body 12 and a lid 13, and a lid 13 having a chamfered shape is placed on the basket body 12. As specific dimensions, for example, the length of the corrugated cardboard basket 10 is set to about 170 to 200 cm, the width is set to about 50 to 70 cm, and the height from the bag body 12 to the lid 13 is set to about 40 to 50 cm.

  A window frame 14 is attached to a position near one end of the lid 13. As shown in FIG. 3, a door for opening and closing the opening W of the lid 13 is attached to the window frame 14.

  As shown in FIG. 1, the lid 13 includes a rectangular top plate 13a, end plates 13b and 13b facing the vertical direction of the top plate 13a (left and right in FIG. 2), and the horizontal direction of the top plate 13a (up and down in FIG. 2). Side plates 13c and 13c facing each other. The chamfered plates 13d, 13d and 13e, 13e are inclined downward with a constant width from the outer edges of the four sides of the top plate 13a to the upper ends of the end plates 13b, 13b and the side plates 13c, 13c.

  Four corner members 15 made of corrugated cardboard are fixed to the four corners of the lid 13. The plate surfaces of these corner members 15 are connected to the plate surfaces of the end plates 13b and 13b, the side plates 13c and 13c, and the chamfered plates 13d and 13d and 13e and 13e. In FIGS. 1 and 2, for convenience of explanation, the corner members 15 are exposed at the four corners of the lid 13. The corner member 15 is not visible in the appearance of 13.

Next, the manufacturing process of the lid 13 will be described.
(A) Preparation of corrugated board As shown in FIG. 4, first, a rectangular corrugated board P1 for preparing the lid 13 is prepared. The dimensions of the corrugated board P1 are as follows: vertical dimension L1: vertical width of the top plate 13a + (height of the claw plate 13b × 2) + (plate width of the chamfering plate 13d × 2), horizontal dimension L2: horizontal width of the top plate 13a + ( The height of the side plate 13c × 2) + (the width of the chamfered plate 13e × 2) is set.
For the corrugated board P1, a three-layer reinforced corrugated board material (for example, manufactured by Triwall) is used. This type of reinforced corrugated board material has three layers of corrugated sheets laminated between two thick plates (liners), and has excellent pressure resistance and water resistance. Note that the cut surfaces on the four sides of the corrugated board P1 are perpendicular to the paper surface.

(B) V-groove cutting Next, the first vertical V-groove Y1 and the second vertical V-groove Y2 are formed along the vertical folds on the paper surface of the corrugated board P1, and the first vertical V-groove Y2 is formed along the horizontal folds. A first horizontal V-groove X1 and a second horizontal V-groove X2 are formed.

The positional relationship between the V grooves satisfies the conditions shown below.
The first vertical V-grooves Y1 and Y1 have the distance between the center lines matched to the horizontal width of the top plate 13a, and the left and right outer plate widths of the center lines of the first vertical V-grooves Y1 and Y1 are chamfered plates 13e and 13e. It is made to correspond with the board width of the side plates 13c and 13c.
The second vertical V-grooves Y2 and Y2 are arranged such that the distance between these center lines and the center line of the first vertical V-grooves Y1 and Y1 is equal to the plate width of the chamfered plates 13e and 13e. The plate widths on the left and right outer sides of the center line are matched with the plate widths of the side plates 13c and 13c.

On the other hand, the first horizontal V-grooves X1 and X1 have the distance between the center lines of these V-grooves matched with the vertical width of the top plate 13a, and the plate widths on the upper and lower outer sides of the center lines of the first horizontal V-grooves X1 and X1 The widths of the chamfered plates 13d and 13d and the end plates 13b and 13b are made to coincide with each other.
The second horizontal V-grooves X2 and X2 are arranged such that the distance between these center lines and the center lines of the first horizontal V-grooves X1 and X1 matches the plate width of the chamfered plates 13d and 13d. The widths of the upper and lower outer sides of the center line are made to coincide with the widths of the end plates 13b and 13b.

  For forming each V-groove, for example, a cutting machine provided with a rotary blade having an equilateral acute angle section may be used. By moving such a rotary blade in a linear direction on the paper surface, the center of the V-groove can be formed at the tip, and the V-groove surface can be evenly cut at the slopes on both sides. Of the laminated structure of the corrugated cardboard plate P1, when the other layer is cut with a rotary blade while leaving the thickest plate (liner) at the bottom when viewing FIG. 4 from above, the remaining thick plate portion is easily along the V-groove. Bend to.

The angle formed by the inclined surface of each V groove is set to 45 °. By setting all the groove angles of the V-groove to 45 °, the chamfered shape of the lid 13 has an appropriate inclination, and the trouble of changing the rotary blade for each V-groove is saved, reducing the burden of cutting. .
The processing order of each V-groove is not particularly limited, but desirably, when a plurality of vertical or horizontal V-grooves are simultaneously cut, each V-groove in FIG. Can be finished with.

(C) Cutting the Four Corners Next, as shown in FIG. 5, the rectangular pieces are cut and removed from the four corners of the corrugated board P1. In this process, a blade is inserted along the center lines of the first vertical V grooves Y1 and Y1 and the first horizontal V grooves X1 and X1, and only the lowermost thick board (liner) in FIG. 5 of the corrugated board P1 is cut. What is necessary is just to perform by a mechanical work and also by a manual work.
In this step, the window opening W is also cut along with the cutting of the rectangular piece.

(D) Bending of the corrugated board As shown in FIG. 5, with the rectangular pieces cut off from the four corners of the corrugated board P1, the corrugated board P1 is bent along each V groove to form the box shown in FIG. To do. At this time, since each V-groove is in a valley fold state and each groove surface comes into contact, the shape of the box is stabilized by fixing these groove surfaces with an adhesive or the like.

(E) Production of Square Member As shown in FIG. 6, the box assembled in the process D has open spaces S corresponding to the four corner portions excluding the square pieces. In the open space S, end faces of the end plate 13b, the side plate 13c, and the chamfered plates 13d and 13e are exposed with a certain shape and inclination. Therefore, the corner members 15 (refer to the two-dot chain lines in FIG. 7) corresponding to the shapes and inclinations of these end surfaces and connected to the plate surfaces of the end plate 13b, the side plate 13c, and the chamfered plate 13d are separately manufactured.

  The square member 15 is produced using, for example, a conventionally known molding method (injection molding, press molding, etc.), cutting, polishing or the like using a material (resin, wood, paper material, etc.) that can be bonded to the cardboard material. This is done by processing into the shape shown in FIG. In the case of manufacturing with a resin material, a mold for obtaining a shape indicated by a two-dot chain line in FIG. 7 is prepared in advance, and the four corner members 15 are manufactured by molding the resin material with the mold. As another manufacturing method, you may produce the square member 15 by compressing a wood chip or molding a pulp material.

  As for the manufacturing method of the corner member 15, a planar quadrilateral type shape can be produced by cutting the corrugated cardboard plate in the same manner as the corrugated cardboard plate P 1. Hereinafter, this production method will be specifically described.

(Ea-1) Preparation of Corrugated Paper Piece First, as shown in FIG. 8, a corrugated paper piece Q1 for preparing the corner member 15 is prepared.
The corrugated paper piece Q1 can be obtained, for example, by cutting out a paper piece corresponding to the shaded portion q1 of the corrugated board P1 shown in FIG. 5 from the corrugated board.
That is, the corrugated paper piece Q1 has an outer plate 16 and an inner plate 17, and has a vertical V groove Y3 between them and a vertical cut surface Y4 at the right end of the inner plate 17 in FIG. The outer plate 16 has the same plate width (height) as the end plate 13b or the side plate 13c, and the inner plate 17 has the same plate width as the chamfered plates 13d and 13e.
Further, the vertical V groove Y3 and the vertical cut surface Y4 have an inclined surface equal to the V groove of the cardboard plate P1, and the horizontal cut surfaces X3 and X4 form a horizontal V groove from the back side in FIG. 5 of the cardboard plate P1. It has an inclined surface equal to the inclined surface.

(Ea-2) Production of divided pieces Next, the divided pieces 15A and 15B of the corner member 15 are formed using a corrugated cardboard piece Q1 (see FIG. 11). First, the divided pieces 15A and 15B are formed by corrugating the corrugated paper piece Q1 shown in FIG. 8 along the vertical V-groove Y3, and forming the outer plate 16 and the inner plate 17 into a "<" shape as shown in FIG. Make it bent. In this state, the corrugated paper piece Q1 is cut along a plane H of 45 ° passing through the corner of the front end of the inner plate 17 when viewed from the plane direction (see FIG. 10), and both end portions of the corrugated paper piece Q1 are cut off. Then, the divided pieces 15A and 15B are obtained from the portion separated by the plane H of the cardboard paper piece Q1.

(Ea-3) Combining of Divided Pieces Next, as shown in FIG. 11, the cut surfaces of the divided pieces 15A and 15B by the plane H are overlapped and bonded in a palm-arranged state, and the corner member 15 is completed.
When the corner member 15 is viewed from the plane direction, the outer shape of the divided pieces 15 </ b> A and 15 </ b> B is a quadrangle, and has the same shape as the open space S of the box body of Step E viewed from the plane direction. Moreover, since the end surface (joint surface) of the corner member 15 is inclined in the direction opposite to the cut surface by the V-groove of the corrugated cardboard plate P1, the end surfaces of the end plate 13b, the side plate 13c, and the chamfered plates 13d and 13e in the open space S are provided. (Join surface) exactly matches.

  In addition, about the procedure which unites division | segmentation piece 15A, 15B, it is not necessarily restricted to the said order, You may adhere | attach the division | segmentation body 15A, 15B to the corrugated board P1 of FIG. In this case, when the corrugated board P1 is folded and assembled, the divided bodies 15A and 15B are simultaneously combined so as to fill the open spaces S at the four corners.

  Thus, by producing the square member 15 using the corrugated paper piece Q1, the color and texture of the surface of the box formed by the corrugated board P1 and the square member 15 can be unified, and the appearance is also improved. . Further, since it is only necessary to form V-grooves having a common groove width and interval on the corrugated board P1 and the corrugated paper piece Q1, the same cutting machine can be used efficiently, and the manufacturing cost can be reduced.

(F) Attaching the square member After the square member 15 is manufactured, as shown in FIG. 7, the square member 15 is fitted into the open space S of the box by the corrugated board P1, and the end plate 13b, the side plate 13c, and the chamfered plates 13d and 13e are fitted. These end faces and the end face of the corner member 15 are fixed with an adhesive or the like so that no step or gap is formed at the joint between them. When the four corner members 15 are fixed in the open spaces at the four corners of the box, the planar quadrilateral lid 13 shown in FIG. 1 is completed.

  As described above, according to the manufacturing method of the first embodiment, the four corners of the corrugated board P1 are separated in order to separate the rectangular pieces at the four corners along the first vertical V-groove Y1 and the first lateral V-groove X1 that are the folds of the corrugated board P1. There is no need to perform complicated processing on the part. For this reason, the corrugated board P1 can be easily processed with a cutting machine for V-groove processing. Further, since the corner member 15 can be easily manufactured by a molding machine, a cutting machine, etc., the lid 13 having a chamfered shape is efficiently manufactured by combining the processing of the corrugated board P1 and the manufacture of the corner member 15. can do.

[Second Embodiment: Planar Octagon Type]
Next, a method for producing a flat octagonal type corrugated board bag shown in FIG. 12 will be described.
This type of cardboard box 20 has four corners when viewed from the plane direction, and has an octagonal shape. Four corner members 25 having a chamfered surface are attached to the four corner portions of the lid 13 (see the two-dot chain line in FIG. 13).

  About the manufacturing method of the lid | cover 13, it can replace with the square member 15 of 1st Embodiment, and can use the manufacturing method fundamentally similar to 1st Embodiment by using the square member 25. FIG. That is, the part except the process E among the said process A-process F can be performed in a common procedure.

  When the square member 25 is manufactured in the step E, the shape of the square member 25 is a combination of a rectangle and a triangle as shown by a two-dot chain line in FIG. As in the first embodiment, the four corner members 25 having such a shape are produced by an existing forming method, a processing method such as cutting / polishing, and are fitted into the four corners of the box formed by folding the corrugated board P1. Thus, the planar octagonal lid 13 is completed.

  Similarly to the first embodiment, when the square member 25 is manufactured by cutting a corrugated cardboard plate, the following manufacturing method can be used.

(Eb-1) Preparation of Corrugated Paper Piece As shown in FIG. 14, for example, a corrugated paper piece Q1 similar to that of the first embodiment is used as a corrugated board for producing the corner member 25. As shown in FIG. 14, in the second embodiment, the outer plate 16 and the inner plate 17 of the corrugated cardboard piece Q1 are separated from each other by the center line of the vertical V groove Y3.

(Eb-2) Preparation of triangular and rectangular pieces Next, two lateral V-grooves X5 and X6 are formed on the outer plate 16 at the same interval as the width of the chamfered plates 13d and 13e in the horizontal direction of FIG. The rectangular piece 25A is cut off at the center line of these V grooves.
On the other hand, the inner plate 17 is formed with horizontal V-grooves X7 and X8 in an oblique direction so as to draw an equilateral triangle having the width of the chamfered plates 13d and 13e as one side, and the center line of these V-grooves Cut off the triangular piece 25B.

(Eb-3) Combining of a triangular piece and a rectangular piece The rectangular piece 25A and the triangular piece 25B obtained in the above step are bonded together at the groove surface of the vertical V groove Y3 and combined. Then, as shown by a two-dot chain line in FIG. 13, the corner member 25 having a shape in which the triangular piece 25 </ b> B is bent in a “<” shape above the rectangular piece 25 </ b> A is obtained.
And the end surface of this corner member 25 is the open space S of the box body of the above-mentioned process E, and exactly matches with the end surface (joint surface) of the end plate 13b, the side plate 13c, and the chamfered plates 13d, 13e, and the end plate 13b and the side plate 13c. The plate surfaces are connected by the plate surface of the rectangular piece 25A, and the plate surfaces of the chamfered plates 13d and 13e are connected by the plate surface of the triangular piece 25B.

  Thus, according to the manufacturing method of 2nd Embodiment, it replaces with the square member 15, and can employ | adopt the square member 25, and can manufacture the plane octagonal type corrugated cardboard cage | basket 20 easily. Further, since the number of surfaces constituting the outer shape of the corrugated cardboard bag 20 is increased, the high-class feeling of the bag can be enhanced.

  Further, when the square member 25 is manufactured by cutting the corrugated board, the surface color and texture of the box formed by the corrugated board P1 and the square member 25 can be unified, and the appearance is also improved. . Moreover, the same cutting machine can be efficiently used for processing the corrugated board P1 and the corrugated paper piece Q1, and the manufacturing cost can be reduced.

[Third Embodiment: Planar Square Type with Folding]
Next, a method for producing a folded flat plane type cardboard box will be described.
As shown in FIG. 15, the corrugated board 30 has a folded plate 33 having a uniform width at the lower end of the lid 13, that is, the lower end of the end plate 13b and the side plate 13c (not shown). As described above, basically the same manufacturing method as that of the first embodiment can be adopted for the lid 13 having the folded plate 33. Specifically, it is as follows.

(A) Preparation of Corrugated Cardboard Plate As shown in FIG. 16, in the third embodiment, first, the vertical dimension L1 and the horizontal dimension L2 are folded back from the corrugated cardboard plate P1 (see FIG. 4). For this purpose, a corrugated board P2 that is long by the width of the W groove is prepared.

(B) Cutting of the V-groove In the longitudinal direction of the corrugated board P2, the first vertical V-groove Y1 and the second vertical V-groove Y2 are formed in the same manner as in the first embodiment. Vertical W grooves Y5 and Y5 are formed on the left and right outer sides of Y2 while leaving the width of the folded plates 33 and 33.
On the other hand, in the horizontal direction of the corrugated board P2, the first horizontal V-groove X1 and the second horizontal V-groove X2 are formed in the same manner as in the first embodiment, and further folded back to the upper and lower outer sides of the second horizontal V-groove X2 and X2. The lateral W grooves X5 and X5 are formed leaving the plate width of the plate 33.

  The vertical W grooves Y5, 5 and the horizontal W grooves X5, 5 are set so that the V-shaped inclined surfaces arranged in two rows form an angle of 90 °. Thus, when the corrugated board P2 is bent along the folds of the vertical W grooves Y5, 5 and the horizontal W grooves X5, 5, the lower ends of the side plates 13c and the end plates 13b are folded back 180 °.

(C) Cutting the Four Corners Next, as shown in FIG. 16, square pieces at the four corners are cut from the corrugated cardboard plate P2 along the center lines of the first vertical V grooves Y1, Y1 and the first horizontal V grooves X1, X1. Cut and remove.

(D) Bending of corrugated board In the state which cut | disconnected the square piece from the four corner parts of corrugated board P2, the corrugated board P2 is bent along each V groove and each W groove, and the box shown in FIG. 17 is formed. At this time, since each V-groove and each W-groove are in a valley-folded state and each groove surface comes into contact, the shape of the box is stabilized by fixing these groove surfaces with an adhesive or the like.

(E) Production of corner member A corner member that fills the open space S in the open space S of the box assembled in the process D in connection with the plate surfaces of the end plate 13b, the side plate 13c, the chamfered plates 13d and 13e, and the folded plate 33. 35 (see the two-dot chain line in FIG. 17) is prepared separately.
The square member 35 can be manufactured by an existing forming method, a processing method such as cutting / grinding, using a material that can be bonded to the corrugated board as in the first embodiment.

  Further, the square member 35 may be made of a corrugated board by the same procedure as in the first embodiment. In this case, for example, a corrugated paper piece corresponding to the shaded portion q2 of the corrugated board P2 shown in FIG. 16 is prepared, and the corrugated paper piece Q2 is bent along the V and W grooves as shown in FIG. When the folded corrugated paper piece Q2 is cut along a plane H similar to that in the first embodiment (step Ea-2), two mutually-target divided pieces 35A and 35B are obtained. Then, by attaching the cut surfaces of these divided pieces 35A and 35B in a palm-arranged state, a square member 35 of a planar square type with folding is obtained.

(F) Attaching the square member After the square member 35 is manufactured, as shown in FIG. 17, the square member 35 is fitted into the four corners of the box made of the corrugated board P2, and the end plate 13b, the side plate 13c, the chamfered plates 13d and 13e, and The end face of the square member 35 is fixed to each end face of the folded plate 33 with an adhesive or the like. When the four corner members 35 are fixed to the four corners of the corrugated cardboard plate P2, the flat square-shaped lid 13 with folding is completed.

  According to such a manufacturing method, since the square member 35 is adopted, it is not necessary to perform troublesome processing on the four corner portions of the corrugated board P2, and therefore, a folded corrugated cardboard box can be easily produced. Moreover, since the lower end part of the lid | cover 13 is reinforced with the folding | turning board 33, durability of the lid | cover 13 can be improved significantly.

[Fourth embodiment: octagonal type with folding]
The folded octagonal type corrugated cardboard box has a shape with rounded corners like the corrugated cardboard box of the second embodiment (see FIG. 12). This type of corrugated cardboard lid 13 can be manufactured by using a square member 45 in place of the square member 35 of the third embodiment, as shown in FIG. That is, the part except process E among process A-process F of 3rd Embodiment can be performed in the same procedure as 3rd Embodiment.

  In the fourth embodiment, the corner member 45 is produced in step E by forming rectangular and triangular chamfered surfaces on the corner member 45, as indicated by a two-dot chain line in FIG. As in the third embodiment, the four corner members 45 having such a shape are manufactured by an existing forming method, a processing method such as cutting / polishing, and are fitted into the four corners of the box formed by folding the corrugated board P2. Thus, the planar octagonal lid 13 with the folded back is completed.

  Further, the square member 45 may be made of a corrugated board by the same procedure as in the second embodiment. In this case, for example, as shown in FIG. 20, the folded plates 33, 33 of the corrugated cardboard plate P2 are folded in front by 180 ° along the vertical W groove Y5 and the horizontal W groove X5 (see FIG. 16) in FIG. Fix it with an agent. In this state, a corrugated paper piece Q3 corresponding to the shaded portion q3 of FIG. 20 is formed, and this corrugated paper piece Q3 is cut at each inclined surface in the same procedure as in the second embodiment, and a rectangular piece 45A with a turn and a triangle A piece 45B is obtained (see FIG. 19). Then, the rectangular piece 45A and the triangular piece 45B are combined in a state of being bent into a “<” shape to form a square member 45.

  As described above, according to the manufacturing method of the fourth embodiment, by adopting the square member 45, it is not necessary to perform troublesome processing on the four corner portions of the corrugated board P2. Can be manufactured. Further, since the lower end portion of the lid 13 is reinforced by the folded plate 33, the durability of the lid 13 can be remarkably enhanced, and further, the number of surfaces constituting the outer shape of the corrugated cardboard cage is increased. A sense of quality can be enhanced.

[Modification]
As mentioned above, although 1st-4th embodiment of this invention was described, embodiment of this invention is not limited to these, You may accompany various deformation | transformation.
For example, in the first to fourth embodiments, the manufacturing method of the present invention is applied to the lid of the corrugated cardboard basket. However, the manufacturing method of the present invention may be applied by attaching a similar chamfered shape to the bag body.
In the first to fourth embodiments, the angle of the V groove for bending the corrugated board is set to 45 °. However, the angle is not necessarily limited to this, depending on the angle of the chamfered board or the angle of the side board or the face board. It is possible to change.
Moreover, in 1st-4th embodiment, although the window frame was provided in the cover of the cardboard box, of course, you may abbreviate | omit a window frame as needed.

It is a perspective view which shows the corrugated board bag of 1st Embodiment of this invention. The corrugated cardboard basket is shown, (A) is a plan view and (B) is a side view. It is an exploded sectional view showing the corrugated cardboard cage. It is the top view and end view of a broken line direction which show the corrugated board for manufacturing the cover of the corrugated board bag. It is a top view which shows the state which removed the square piece from the four corner parts of the corrugated board. FIG. 6 is a perspective view showing a box (a semi-finished product of a lid) formed by bending the corrugated board of FIG. 5. It is a partial expansion perspective view which shows the four corner parts of the lid. It is the top view which shows the corrugated paper piece for producing the square member of the cover, and the end elevation of a broken line direction. It is a perspective view which shows the state which bent the corrugated paper piece of FIG. FIG. 10 is a plan view of the corrugated cardboard piece shown in FIG. 9 and an end view in a broken line direction. It is a perspective view which shows the corner member of the lid. It is a perspective view which shows the cardboard box of 2nd Embodiment of this invention. It is a partial expansion perspective view which shows the four corner parts of the lid | cover of the corrugated board bag. It is the top view which shows the corrugated paper piece for producing the square member of the cover, and the end elevation of a broken line direction. It is an exploded sectional view showing the corrugated cardboard cage of a 3rd embodiment of the present invention. It is the top view and end view of a broken line direction which show the corrugated board for manufacturing the cover of the corrugated board bag. It is a partial expansion perspective view which shows the four corner parts of the lid. It is a perspective view which shows the state which bent the corrugated paper piece for producing the square member of the cover. It is a partial expansion perspective view which shows the four corner parts of the lid | cover of the corrugated board bag by 4th Embodiment of this invention. It is the top view and end view of a broken line direction which show the corrugated board for manufacturing the cover of the corrugated board bag. It is a perspective view which shows the shape of the conventional ridge. It is the top view which shows the corrugated board for manufacturing the lid | cover of the conventional corrugated board bag, and the end elevation of a broken line direction.

Explanation of symbols

10 Corrugated cardboard cage (first embodiment)
12 棺 body 13 Lid 13a Top plate 13b End plate 13c Side plate 13d, 13e Chamfer plate 14 Window frame 15 Corner member (first embodiment)
20 Corrugated cardboard cage (second embodiment)
25 square member (second embodiment)
30 Corrugated cardboard cage (third and fourth embodiments)
33 Folding plate 35 Square member (third embodiment)
45 square members (fourth embodiment)
P1 Corrugated board (first and second embodiments)
P2 Corrugated board (third and fourth embodiments)
S Open space X1 First horizontal V groove X2 Second horizontal V groove X5 Horizontal W groove Y1 First vertical V groove Y2 Second vertical V groove Y5 Vertical W groove W Opening

Claims (4)

A rectangular top plate,
A pair of end plates facing the longitudinal direction of the top plate;
A pair of side plates facing the lateral direction of the top plate;
A method for producing a corrugated board having a chamfered plate that is inclined at a constant width from the four-side outer edges of the top plate to the upper end of the end plate and the side plate,
A. Preparing a rectangular corrugated board having the following vertical and horizontal dimensions;
Vertical dimension: vertical width of the top plate + (height of the end plate × 2) + (plate width of the chamfered plate × 2),
Horizontal dimension: width of the top plate + (height of the side plate × 2) + (plate width of the chamfered plate × 2).
B. Forming a V-groove shown in the following B1 to B4 on the plate surface of the corrugated board,
B1: A pair of first vertical V-grooves that extend in the vertical direction while maintaining the horizontal width of the top plate and leaving the width of the chamfered plate and the side plate at the left and right ends of the corrugated board
B2: A pair of second vertical V grooves extending in the vertical direction while maintaining the width of the chamfered plate on the left and right outer sides of the pair of first vertical V grooves and leaving the width of the side plate at the left and right ends of the corrugated board. ,
B3: A pair of first horizontal V-grooves that extend in the horizontal direction while maintaining the vertical width of the top plate and leaving the width of the chamfered plate and the end plate at the upper and lower ends of the corrugated board
B4: A pair of second horizontal V-grooves that extend in the lateral direction while maintaining the width of the chamfered plate on the upper and lower sides of the pair of first horizontal V-grooves and leaving the width of the face plate at the upper and lower ends of the corrugated board .
C. The rectangular pieces at the four corners of the corrugated board defined by the pair of first vertical V grooves and the pair of first horizontal V grooves are center lines of the first vertical V groove and the first horizontal V groove. Cutting and removing along,
D. A step of folding the corrugated board from which the rectangular pieces have been removed in the step C along the V-grooves of the step B and assembling them into a box shape;
E. Producing four equally-shaped corner members according to the open spaces at the four corners of the box assembled by the step D;
F. A method for manufacturing a corrugated board bag comprising the steps of fitting the four corner members into open spaces at the four corners and bonding them to the end faces of the chamfered plate, the end plate and the side plate.   The corrugated board manufacturing method according to claim 1, wherein the square member of the step E is formed by cutting a corrugated board so that the outer shape viewed from the plane direction of the corrugated board is a square. A method for producing firewood.   The method for manufacturing a corrugated board bag according to claim 1, wherein the square member of the step E is formed by cutting a corrugated board so that an outer shape viewed from a planar direction of the cardboard box is an octagon. A method for producing corrugated cardboard baskets. The method for manufacturing a corrugated board bag according to any one of claims 1 to 3, wherein a folded plate that is bent along a W groove of the corrugated board is provided at a lower end of the end plate and the side plate. Method.

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