JP6430126B2 - Folding sheet box making method and apparatus - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding sheet box manufacturing method and apparatus, and more particularly to a folding sheet box manufacturing method and apparatus in which a corrugated cardboard box has an octagonal cross section.

  Conventionally, a corrugated box that has been finished in a square tube shape is crushed (folded), and the inner flaps on the front and rear surfaces on the bottom side are folded into a square tube shape, and then the outer flaps on each side surface are folded. A method is known in which the butted portion of the flap is closed with a tape to form a bottomed box (Patent Document 1).

  In addition, a method for making an octagonal cross section is disclosed in Patent Document 2, and in the case of Patent Document 2, a flat material is bent and shaped into a box shape using a mold, and then bonded with an adhesive. It is supposed to be.

  The technique disclosed in Patent Document 1 relates to the making of a normal rectangular or cubic cardboard box, and does not particularly describe the box making technique in which the cross section is an octagon.

  The technique in Patent Document 2 requires a wide space for preparing and preparing a sheet material as a raw material, and the mechanical device becomes large and the installation space is restricted. Moreover, since a metal mold is required, a metal mold adapted to each sheet material that is a raw material is necessary, which is very expensive.

JP 2005-14619 A JP 2010-22224 A

  The problem to be solved by the present invention is that a folding sheet box that has been finished in a cylindrical shape in advance has been used as an octagonal box with a cross section, and there has been no method or apparatus for manufacturing that corresponds to the size change. Therefore, as described in Paragraph 0005, Patent Document 2 considers a case-former using (introducing) a general factory unit, and a case-former using a mold at a factory that currently uses a square box. (Blisbox) is difficult to introduce in terms of equipment and money. Accordingly, the inventor has developed a box making method and an apparatus thereof from an octagon box folding sheet.

In order to solve the above-described problems, the folding sheet box manufacturing method according to the present invention is finished in a cylindrical shape in advance, and the front ends are directed inward on both side edges of the upper and lower flaps (outer flaps) of each side wall. A box with a fold line to form a chamfered part is formed in a line that connects the back end of the notch in the vertical direction. In the box-making method for folding sheets, the total dimension of the width (length from the base end to the free end) facing each other on the upper and lower surfaces (bottom surface) of each of the upper and lower flaps (outer flaps) Forcing the box into a square tube in which each side wall and the front and rear surfaces are parallel to each other, expanding the inner flaps of the front and rear wall surfaces of the bottom surface, The outer ends of the flaps are butted against each other Fold it to an appropriate angle, then expand the dimensions between the side walls, and press the outer end of the outer flap together, and release the pressure by the presence of the notches and folds to remove the chamfer. It is characterized by forming.

  In addition, the folding sheet box making method according to the present invention adds a means for holding the shape after forming into the above-mentioned octagonal cross section, transfers the box with the holding means added, and moves the box outside the bottom surface. It is characterized in that tape is applied to the joint of the flap, the length of the taper line forming the substantially boot shape of the notch described above is the same as the width of the chamfered portion to be a corner cut, It is characterized in that a chamfered portion that becomes a corner cut is formed between the above-described notches in the vertical direction.

  Further, the folding sheet box manufacturing method according to the present invention is characterized in that the above-mentioned box is formed of A-type corrugated cardboard, and the above-mentioned square cylinders whose side walls and front and rear surfaces are forcibly parallel are described above. The method of expanding by causing is to use a pair of clamping plates that are opposed and pivoted synchronously, and the side walls are pivoted at right angles with either one of the front and rear surfaces positioned and fixed. .

The box making apparatus according to the present invention is an apparatus for carrying out the box making method according to claim 1, and holds the box finished in a cylindrical shape and forces the box body having a square section. In a box making apparatus having means for automatically triggering, means for folding the inner flap on the bottom surface, and means for folding the outer flap on the bottom surface to an appropriate angle. And a means for pressurizing the outer flaps of the bottom surface until they become horizontal and a means for holding the box from the side. The means for holding the box according to 7 and forcibly inducing the cylinder having a quadrangular cross section is a pair of synchronously pivoting clamping plates provided with needles. The means to hold the position is And characterized in that a Yumuchakku, means for pressurizing means and pressurizing folding the outer flaps above are characterized by a piston that uses air.

  Further, the box making apparatus according to the present invention is provided with means for holding the shape after opening the box in an octagonal cross section, and the means for holding the inner surface or the outer surface of the box, or It is characterized by acting from both sides, and the means according to claim 13 is characterized in that a plate having a shape combined with a box shape is provided at the tip of a piston using an air cylinder.

  The folding sheet making method and apparatus according to the present invention are configured as described above. Therefore, in this application, a new folding sheet that is completely different from the conventional rectangular cross-section tubular sheet is used, and it is forced to form a square cylinder, which is expanded by applying force to the side surface. By pressing the butt of the bottom outer flap and forming a chamfered portion of the corner cut, a box with an octagonal cross section is obtained, which can easily cope with the size change of the original box and does not require a mold. In addition, since the apparatus is compact and requires a small installation space, the cost can be greatly reduced as compared with the conventional apparatus. In addition, the folding sheet used in the present invention can retain its shape even if there is no brim.

  By making the box into an octagonal cross section, which is also an octagon with rounded corners, the strength of the box increases, and it can withstand more stacking than before, and the stored items are detergent, shampoo, soy sauce, etc. Even if it is a thing for refilling, a special partition plate can be made unnecessary. Further, since the number of surfaces as a whole increases, the number of written parts also increases, so that advertisements and the like can be printed, and if necessary, store display is possible as it is.

It is a side view which shows the state by which the original box was folded. (A) is a plan view that causes a square tube shape, and (B) is a plan view in which the dimension between both side surfaces is expanded. It is a side view of the state which raised and made it the shape of a square cylinder. It is a front view which shows the state which faced | matched the free end surface of the outer flap of a bottom face. It is the front view which made the outer flap of the bottom face the horizontal state. It is a bottom view of a completed state. It is a front view which shows the state which pivoted and opened the plate as a means to hold | maintain and raise an original box. It is a side view which shows the means to fold the inner flap of a bottom face. It is a front view which shows the means which positions and hold | maintains an original box, and folds the outer flap of a bottom face. It is a front view of the state which pushed the outer flap of the bottom in the horizontal state. It is a perspective view of the completed box. It is a top view which shows the means to hold | maintain the shape of the box made into the octagonal cross section. It is a top view which shows a modification. It is a top view which shows a modification. It is a top view which shows a modification. It is a top view which shows a modification. It is an external view. It is a top view which shows a modification It is a figure which shows the state immediately before the state shown as FIG.

  This was realized by configuring as illustrated in the drawings and described in the examples.

  Next, an example of a preferred embodiment of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes an original box finished in a corrugated cardboard shape. FIG. 1 shows a folded state. The original box 1 has a rear wall surface 3 and left and right side wall surfaces 4 and 5 facing the front wall surface 2, and inner flaps 6, 6, 7, and 7 are respectively provided on the upper and lower edges of the front and rear wall surfaces 2 and 3. The outer flaps 8, 8, 9, and 9 are integrally formed on the upper and lower edges of the side wall surfaces 4 and 5 through the folding lines.

  The side edges of each of the outer flaps 8, 8, 9, 9 are formed with boots-shaped notches 10, 10,... With their tips directed inward. Folding lines 10a, 10a,... For forming the corner chamfered portions 11, 11 are provided in advance in the line connecting in the direction, and pressure is applied from the free end butt of the outer flaps 8, 8 described later. It is a relief part of the pressing force. Then, between the vertical directions of the notches 10, 10... Are chamfered portions 11, 11. The boots-shaped taper lines 10b, 10b... Of the notches 10, 10 have the same length as the chamfered portions 11, 11. The tapered lines 10b, 10b are located above and below the chamfered portions 11, 11. The box can be closed by being matched with the edge. The total length of each pair of width dimensions of the opposing outer flaps 8, 8 and 9, 9 is set larger than the width dimension of the front wall surface 2 and the rear wall surface 3.

  The original box 1 having such a configuration is set on a pair of plates 12 and 12 that pivot 90 degrees. The plates 12 and 12 are pivotally supported by the support bar 13 so that the distance between them can be adjusted. Initially, the two plates 12 and 12 that are open overlap each other in the length direction of the support bar 13. The original box 1 in a state of being collapsed (folded) below the plates 12 and 12 is placed in a supply facility having a slope, and the original box 1 is pushed up from below. By pushing up by means (injector), the needles 14, 14... Are pushed into the corrugated core grooves of the upper outer flaps 9, 9. Is positioned and held by the plates 12 and 12, and then the original box 1 folded by the pivot of the plates 12 and 12 is caused to be in a square tube state.At this time, a plurality of folding lines are formed in the original box 1 and can be opened (as axes) along arbitrary folding lines. That is, since a part is fixed, the original box 1 can be forcibly formed into a square cylindrical shape. Specifically, the original box 1 can be forcibly formed into a rectangular cylindrical shape by pivoting the plates 12 and 12 based on a fold line connecting the front and rear surfaces 2 and 3 and the chamfered portions 11 and 11.

  Since the distance between the plates 12 and 12 can be adjusted, even if the size of the original box 1 is changed, the change can be smoothly handled.

  When the original box 1 is raised and opened, the folding devices 15 and 15 for the front and rear flaps 6 and 6 on the bottom surface come out below the original box 1. The folding devices 15 and 15 are pivotally supported on the upper end surfaces of the bases 16 and 16 in the lateral direction, respectively, and pivot and tilt in the vertical direction.

  When the folding devices 15 and 15 described above are pivoted into an inclined state shown as an imaginary line in FIG. 8, the plates 12 and 12 holding the original box 1 are lowered, and the inner flaps 6 and 6 are moved. The folding devices 15 and 15 are in contact with each other and folded inside. Thereafter, the folding devices 15 and 15 are restored to the horizontal state, so that the inner flaps 6 and 6 are brought into the horizontal state.

  Simultaneously with the end of folding of the inner flaps 6 and 6, vacuum chucks 17 and 17 having suction cups at the tips at the same height approach the left and right side walls 4 and 5, respectively, 5 is attracted to the outer surface, and the position of the original box 1 is maintained. At this time, while the left and right side walls 4 and 5 are held at this pressure, a force to be pulled outward by the action of the vacuum is also applied.

  The air cylinders 18 and 18 as means for folding the outer flaps 8 and 8 on the bottom surface and the pressure pistons 19 and 19 sliding inside the air cylinder 18 are taken out while being held by the vacuum chucks 17 and 17. The outer flaps 8, 8 are bent to an angle of approximately 45 degrees by 19, 19 and the free edges of the outer flaps 8, 8 are abutted to form a chevron shape.

  From this state, the folding devices 15 and 15 return to the standby position, and the plates 12 and 12 are raised while holding the original box 1 with the vacuum chucks 17 and 17, and the original box 1 is removed from the plates 12 and 12. State.

  With the original box 1 held by the vacuum chucks 17, 17, the pressing air cylinder 20 waiting below the original box 1 and the pressing piston 21 that slides in the air cylinder 20 in the vertical direction rises. Then, the abutting portions of the outer flaps 8, 8 are pressed with a uniform pressure. At this time, the vacuum chucks 17 and 17 also suck the left and right side walls 4 and 5 and expand the dimension between the left and right side walls 4 and 5.

  The pressure applied to the outer flaps 8 and 8 is transmitted to the base ends of the outer flaps 8 and 8 by pressing and pressing the abutting portions of the outer flaps 8 and 8 until they are in a horizontal state with uniform pressure. The notches 10 and 10 release this force and the folding lines 10a and 10a are folded to expand the left and right side walls 4 and 5 outward. This force acts as a sufficient load because the total length of the width dimensions of the outer flaps 8 and 8 is larger than the width dimensions of the front and rear wall surfaces 2 and 3. At this time, the holding by the vacuum chucks 17 and 17 is applied with a force for pulling the left and right side walls 4 and 5 outward, so that this spreading action is assisted.

  The chamfered portions 11, 11... Are formed in the chamfered portions 11, 11. Two interior angles of approximately 135 degrees are formed at the boundary with 3 and the chamfered portions 11, 11... Are cut into corners, and a box A having an octagonal cross section is obtained. Here, since the taper lines 10b and 10b of the notches 10 and 10 have the same width as the chamfered portions 11 and 11, the corners of the box are closed.

  Thus, the vacuum chucks 17 and 17 holding the box A having an octagonal cross section are moved in parallel as they are and conveyed by the transport path of the tape applying mechanism, the vacuum chucks 17 and 17 are separated from the box A, and the box A is applied with the tape. A tape is attached to the abutting portion of the outer flaps 8 and 8 which are transported through the transport path of the mechanism and set in a horizontal state, and the bottom surface is closed. In this way, the upper surface is opened, the product A can be stored, and the box A is secured with the bottom surface.

  In addition, in order to accurately hold and transfer the shape of the box A having the octagonal cross section, it is preferable to supplementarily use means for holding the shape. An apparatus as shown in FIGS. 12 to 18 can be considered as the holding means. In FIG. 12, the original box 1 is formed into an octagonal cross section to form a finished product A, and then air cylinders 22, 22 are placed inside the finished product A in a direction along the transfer direction of the finished product A. Each of the air cylinders 22 and 22 is provided with an abutting plate 23 and 23 which fits the inner wall surface of the finished product A, particularly the front and rear surfaces 2 and 3 and the chamfered portions 11 and 11 connected to the inner wall surface of the piston A. The shape is held by the contact plates 23 and 23 by pushing out.

  Further, guide plates 25 and 25 for holding the both side walls 4 and 5 of the finished product A from the inner surface are provided on the base 24 via support shafts. The guide plates 25 and 25 and the abutting plate described above are provided. The chamfered portions 11, 11, etc. are finely held by the pressing force of 23, 23, and become accurate chamfered portions 11, 11. Is prevented from occurring. The vacuum chucks 17, 17... Suck both side surfaces 4, 5 from the outer surface to maintain the shape retention and hold the finished product A.

  Although not particularly shown in FIGS. 13 to 18 below, the vacuum chucks 17, 17... Can be used. In FIG. 13, the contact plates 23 and 23 in the example shown in FIG. 12 are examples in which the design is changed to simple flat plates 23a and 23a. In the case shown in FIG. 14, the air cylinders 22 and 22 are operated in a direction orthogonal to the transfer direction of the finished product A, and the contact plates 23b and 23b provided at the tip of the piston are formed from the inner surfaces of the side walls 4 and 5, respectively. It is set as the shape contact | abutted to the inner surface of the chamfering part 11,11 ..., and the finished product A is expanded from the side wall inner surface, and shape-retaining is carried out. In the case shown in FIGS. 13 and 14, the guide plate can be placed on the inner surface other than the wall surface to be pressed.

  Further, a configuration shown in FIG. 15 can be considered as an improvement of the example shown in FIG. In this case, in addition to the transfer direction of the finished product A, the air cylinder is also operated in the orthogonal direction, and the contact plates 23c and 23c are pressed not only on the inner surfaces of the front and rear walls 2 and 3 but also on the inner surfaces of the side walls 4 and 5. Then, the finished product A is expanded from the inside.

  Next, FIGS. 16 to 18 show a configuration in which the finished product A is held from the outer surface side and held in shape. Abutting plates 23d and 23d that are fitted to the corners are respectively provided at the ends of the pistons of the air cylinders 22a, 22a,... Arranged in an X shape as a whole toward each corner portion of the finished product A. . In the embodiment, the contact plates 23d, 23d, etc. are in contact with the outer surfaces of the chamfered portions 11, 11 and the outer surfaces of the front and rear walls 2, 3, but this is applied to the outer surfaces of the side walls 4, 5. However, it is also possible to adopt a form in which the end portions are on the outer surfaces of the front and rear walls 2, 3 and the side walls 4, 5 with the chamfered portions 11, 11.

  In this example, the finished product A is held from the outer surface by the contact plates 23d, 23d, etc., and the shape is maintained, but the height of the contact plates 23d, 23d, etc. is lower than the lower end of the finished product A. By extending, the inner flaps 6 and 6 and the outer flaps 8 and 8 on the bottom surface that are already folded do not protrude, the shape does not collapse, and the bottom outer flaps 8 and 8 after the transfer are abutted. Tape can also be applied with high accuracy.

  FIG. 18 shows an example in which the air cylinders 22a and 22a are provided outside the side walls 4 and 5 at a position orthogonal to the transfer direction of the finished product A, corresponding to the central portions of the side walls 4 and 5. . The contact plates 23e, 23e provided at the tip of the pistons of the air cylinders 22a, 22a are in contact with the outer surfaces of the chamfered portions 11, 11,... The finished product A is held and retained from the outside of the side walls 4 and 5. In this case, the abutting plates 23e and 23e also extend below the lower end of the finished product A in the height direction so that the inner flaps 6 and 6 and the outer flaps 8 and 8 on the already folded bottom surface Prevents protrusion and maintains a good shape.

  The box making method and apparatus according to the present embodiment are configured as described above. In this embodiment, it is assumed that normal double-sided cardboard is used, but this cardboard may be single-sided, double-sided, or double-sided. There may be. Further, it can be applied to cardboard or plastic instead of cardboard, and the original box can be a cube. When this cardboard or plastic is the target, since there is no corrugated core, it is possible to configure a receiving groove into which a grip mechanism, a suction mechanism, or an outer edge of a flap is fitted, instead of a plate needle.

  The vacuum chuck that holds the original box 1 to the octagonal box A can also be a pressing or restraining mechanism that has elasticity and does not hinder the expansion of both side surfaces. Further, the mechanism for pressing the outer flap on the bottom surface from the butted state to the horizontal state can be replaced with a cylinder or piston using air, and a solenoid can be applied. Then, after the outer flap on the bottom surface is folded first and expanded, the inner flap can be folded against the outer surface of the outer flap and fixed with an adhesive.

DESCRIPTION OF SYMBOLS 1 Original box 2 Front wall surface 3 Rear wall surface 4, 5 Side wall surface 6, 7 Inner flap 8, 9 Outer flap 10 Notch 10a Folding line 10b Taper line 11 Chamfered part 12 Plate 13 Support bar 14 Needle 15 Folding device 16 Base 17 Vacuum Chuck 18, 20, 22, 22a Air cylinder 19, 21 Pressing piston 23, 23a, 23b, 23c, 23d, 23e Contact plate 24 Base 25 Guide plate A Box with an octagonal cross section

Claims (12)

It is finished in a cylindrical shape in advance, and is formed on both side edges of the upper and lower flaps (outer flaps) of each side wall with a substantially boot-shaped notch with the tip facing inward, and the back end of the notch is tied vertically. In a box making method of a folding sheet in which a box provided with a crease for forming a chamfered portion to be cut into a line is formed into a box having an octagonal cross section, the upper and lower surfaces of the upper and lower flaps (outer flaps) The total width of the opposing width (the length from the base end to the free end) is larger than the width of the front and rear wall surfaces (the length between the side edges), and the box is forced to each side wall and front and rear After expanding the inner cylinder on the front and rear wall surfaces of the bottom wall, the pair of outer flaps on the bottom surface are folded to an appropriate angle at which the free ends meet each other, and then the dimensions between the side walls. Expand the flap together with the outside flap Pressurizing the butt end from the outside, box making method of the folded sheet and forming a chamfered portion to escape the pressure by the presence of the notch Oyobi creases.   After forming into the above-mentioned octagonal section, means for holding the shape is added, the box is transferred with the means for holding added, and tape is attached to the joint of the outer flap on the bottom surface A method for making a folding sheet according to claim 1.   3. The folding sheet making method according to claim 1, wherein the length of the taper line forming the substantially boot-shaped shape of the notch is the same as the width of the chamfered portion to be a corner cut. .   The folding sheet making method according to claim 1, wherein a chamfered portion that becomes a corner cut is formed between the notches in the vertical direction.   5. The method for making a folded sheet according to claim 1, wherein the box is formed of A-type cardboard.   As described above, the method of forcibly causing each side wall and the front and rear surfaces to expand in parallel with each other is a state in which one of the front and rear surfaces is positioned and fixed using a pair of sandwiching plates that pivot in synchronization with each other. The folding sheet making method according to claim 1, wherein the both side walls are pivoted at right angles.   An apparatus for carrying out the box making method according to claim 1, comprising means for holding a box finished in a cylindrical shape and forcibly causing a box having a quadrangular section, and an inner flap on the bottom surface. A box making apparatus having means for folding and means for folding the outer flap of the bottom surface to an appropriate angle, together with the means for expanding the sides of the box that are caused in the rectangular tube shape outward, together A folding sheet box making apparatus comprising at least means for pressurizing the butting of the outer flaps on the bottom surface until horizontal and means for holding the box from the side.   The folding sheet box making apparatus characterized in that the means for holding the box according to claim 7 and forcibly causing the cylinder having a quadrangular section is a pair of synchronously pivoting holding plates provided with needles. .   8. The folding sheet box making apparatus according to claim 7, wherein the means for holding the box from the side is a vacuum chuck.   8. The folding sheet making apparatus according to claim 7, wherein the means for folding and pressurizing the outer flap is a piston using air.   A means for holding the shape of the box after opening the box to an octagonal cross section is provided, and the means for holding acts from the inner surface or the outer surface of the box, or both sides. Item 8. A folding sheet box manufacturing apparatus according to Item 7.   12. The folding sheet box making apparatus according to claim 11, further comprising a plate having a shape combined with a box shape at a tip of a piston using an air cylinder.

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