JP3697642B2 - How to make a cardboard box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention supplies a cardboard box flat tube to the upstream side of the sandwich conveyor and opens it into a rectangular rectangular tube shape when viewed in the plane direction, and then folds the short lower cover piece before and after the bottom and inserts it into the sandwich conveyor. Next, regarding the box making method of corrugated cardboard boxes in which the long bottom cover pieces on both sides are folded to the bottom, especially the corrugated cardboard box flat tube that requires a large force to open the cardboard paper into a thick square tube shape is surely square. The present invention relates to a box making method of a cardboard box that can be opened in a cylindrical shape.
[0002]
[Prior art]
JP-A-8-72175 discloses a corrugated cardboard box manufacturing method in which a cardboard box flat tube is supplied to the upstream side of a sandwich conveyor and is opened into a rectangular rectangular tube as viewed in a plane direction. Folded and sandwiched between sandwich conveyors, then folded the bottom lid pieces on both sides to the bottom,
The step of opening the cardboard box flat tube into a rectangular tube shape is performed by placing the cardboard box flat tube on the endless chain belt running in a direction perpendicular to the conveyor insertion direction and the rear surface portion of the cardboard box flat tube. It is configured to drop and supply so as to correspond to the sandwiching space of the sandwich conveyor provided on the front side of the conveyor sandwiching direction,
The step of opening the cardboard box flat tube into a rectangular tube shape involves sucking and holding the rear surface portion of the cardboard box flat tube with a vacuum pad and tilting the cardboard box flat tube slightly forward to remove the short lower cover piece on the front surface. The vacuum pad is pressed against the endless chain belt to move in the direction opposite to the sandwiching direction of the sandwich conveyor, and the rear surface portion sucked and held by the vacuum pad is moved in the direction opposite to the longitudinal feeding direction by the vertical dimension of the cardboard box. In addition, the traveling force of the endless chain belt is transmitted to the front surface portion, causing the front surface portion to move laterally to a position corresponding to the sandwiching space of the sandwich conveyor, and gradually becomes a rectangular tube shape. It is configured to lift slightly from the endless chain belt when it opens into a rectangular rectangular tube as seen in the plane direction. Step of KyoIri to Tchikonbea is configured to move the vacuum pads to the clamping ingress direction to sandwich the conveyor.
[0003]
[Problems to be solved by the invention]
According to the above-mentioned conventional cardboard box making method, (1) the rear surface portion of the flat cylinder for the cardboard box moved in the opposite direction to the sandwiching direction to the sandwich conveyor and sucked and held by the vacuum pad When moving the cardboard box in the opposite direction to the longitudinal feed direction, the cardboard box flat tube is slightly tilted forward and pressed against the endless chain belt running the short lower lid piece on the front part. Since the front portion does not move in the direction opposite to the sandwiching direction to the sandwich conveyor, it is not sufficient to prevent the front portion from moving in the direction opposite to the sandwiching direction to the sandwich conveyor. As a result, a flat cylinder for cardboard boxes that requires a large force to open the front cardboard paper into a thick, square tube can be opened like a square tube. (2) The endless chain belt frictionally slides the short bottom cover piece on the front part of the flat tube for cardboard boxes. There is a problem that dust accumulates. (3) When the front and back short bottom cover pieces are folded to the bottom after opening the flat tube for the cardboard box into a rectangular tube shape, the front and back short bottom cover pieces are the long bottom covers on both sides. If a state that hits the piece occurs, the front and rear short lower cover pieces cannot be folded at the bottom, and the front and rear short lower cover pieces are valley folded from the center of the width and folded into a flat state that is 90 ° different from the original flat state. Will cause a malfunction.
[0004]
The first invention of the present application is that even a flat cardboard box that requires a large force to open the cardboard paper into a thick rectangular tube can be surely opened into a rectangular tube, and a large amount of dust is placed on the floor inside the machine. An object of the present invention is to provide a method for making a corrugated cardboard box in which the accumulation of dust is avoided.
The second invention of the present application is capable of reliably opening a flat cardboard box for a cardboard box that requires a large force to open a thick cardboard paper into a rectangular tube shape. Is accumulated, and when the front and rear short lower lid pieces are folded to the bottom after the cardboard box flat tube is opened into a rectangular tube shape, the front and rear short lower lid pieces hit the long lower lid pieces on both sides. It is an object of the present invention to provide a corrugated cardboard box making method that can reliably fold the front and rear short lower cover pieces.
[0005]
[Means for Solving the Problems]
As a first invention of the present application, a flat cylinder for a cardboard box is supplied upright on the upstream side of a sandwich conveyor, opened in a rectangular rectangular tube shape when viewed in a plane direction, and short bottom lid pieces before and after corresponding to the conveyor conveyance direction In the box making method of the cardboard box, it is inserted into the sandwich conveyor after folding, and then the long lower lid pieces on both sides are folded to the bottom.
The step of supplying the flat cardboard box flat tube is configured to supply on the floor plate in a standing state and to correspond to the sandwiching space of the sandwich conveyor provided on the front side in the conveyor sandwiching direction of the rear surface portion of the flat cardboard box cylinder Yes,
The step of opening the corrugated cardboard box flat tube into a rectangular tube shape is made by slightly projecting the serrated locking plate whose tooth row direction coincides with the conveyor insertion direction on the floor plate and the rear surface portion of the cardboard box flat tube. The vacuum pad is sucked and held and the flat cylinder for the corrugated cardboard box is slightly tilted forward, and the short lower lid piece of the front portion is pressed against the saw teeth of the serrated locking plate so that the front portion is inserted in the sandwich conveyor direction. Disables the movement in the opposite direction, and then moves the vacuum pad in the direction opposite to the sandwiching direction of the sandwich conveyor and sucks and holds the rear surface portion held by the vacuum pad in the direction opposite to the longitudinal feed direction. It moves only in the vertical dimension, causing the front part to move laterally to a position corresponding to the sandwiching space of the sandwich conveyor and gradually opening it into a rectangular tube shape. It is configured to open in the shape of a rectangular square tube as seen in the plane direction by pressing the side part close to the acutely open corner of the front part until it reaches a right angle by the pressing means just before the end of the movement of the vacuum pad. The feature is to provide a cardboard box making method.
As a second invention of the present application, a flat cylinder for a cardboard box is supplied to the upstream side of the sandwich conveyor, opened in a rectangular rectangular tube shape when viewed in a plane direction, and the short lid pieces before and after being folded at the bottom are sandwiched between sandwich conveyors. In the box making method for corrugated cardboard boxes,
The step of supplying the flat cardboard box flat tube is configured to supply on the floor plate in a standing state and to correspond to the sandwiching space of the sandwich conveyor provided on the front side in the conveyor sandwiching direction of the rear surface portion of the flat cardboard box cylinder Yes,
The step of opening the corrugated cardboard box flat tube into a rectangular tube shape is made by slightly projecting the serrated locking plate whose tooth row direction coincides with the conveyor insertion direction on the floor plate and the rear surface portion of the cardboard box flat tube. The vacuum pad is sucked and held and the flat cylinder for the corrugated cardboard box is slightly tilted forward, and the short lower lid piece of the front portion is pressed against the saw teeth of the serrated locking plate so that the front portion is inserted in the sandwich conveyor direction. Disables the movement in the opposite direction, and then moves the vacuum pad in the direction opposite to the sandwiching direction of the sandwich conveyor and sucks and holds the rear surface portion held by the vacuum pad in the direction opposite to the longitudinal feed direction. It moves only in the vertical dimension, causing the front part to move laterally to a position corresponding to the sandwiching space of the sandwich conveyor and gradually opening it into a rectangular tube shape. By pressing until the right angle by pressing means side portion near the corner open at an acute angle of the front portion than the movement near the end of the vacuum pad it will be configured to open in a rectangular square tube shape when viewed in the planar direction,
As a step before the front and rear short lower cover pieces are folded to the bottom after the cardboard box flat tube is opened into a rectangular tube shape, at least one of the long lower cover pieces on both sides is folded to the bottom of the front and rear short lower cover pieces. It is an object of the present invention to provide a corrugated cardboard box manufacturing method, characterized in that it is configured to be slightly opened so as not to interfere.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
A cardboard box making method according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 (a) and 1 (b), the cardboard box has a pair of left and right belt belts 1a and 1b with endless conveyor belts 1c spaced apart from each other. The floor plate 2 is provided on the upstream side of the sandwich conveyor 1 which can be adjusted with respect to the center of the interval, and the flattening cylinder S for the front corrugated cardboard box accumulated in the upper accumulating device 3 is opened. 2 is dropped from between the guide / pressing plate 4a and the guide 5 and supplied to a state of standing on the floor plate 2. Then, as shown in FIGS. 2 (a) and 2 (b), the dentition direction is a conveyor. After slightly projecting the serrated locking plate 6 that coincides with the inserting direction onto the floor plate 2, the unloading device 4 is moved slightly toward the sandwich conveyor 1, and the rear surface portion e of the flat cylinder S for the cardboard box e Is sucked and held by the vacuum pad 4b of the opening device 4, and the guide / pressing plate 4a. Is pressed against the upper portion of the rear surface portion of the cardboard box flat tube S, the cardboard box flat tube S is slightly tilted forward, and the short lower cover piece a of the front surface portion is pressed against the sawtooth of the serrated locking plate 6; Next, as shown in FIGS. 3, 4, and 5, the rear surface portion e sucked and held by the vacuum pad 4 b is moved in the direction opposite to the longitudinal feeding direction by moving the opening device 4 backward. Accordingly, the short lower cover piece a is locked to the sawtooth of the serrated locking plate 6, and the front surface portion f corresponding to the short lower cover piece a corresponds to the sandwiching space of the sandwich conveyor 1. The horizontal movement to the position occurs, and the diamond is opened from the rhombus to the square when viewed in the plane direction, and the horizontal plane is shaken by the air cylinder device or the like immediately after the rearward movement of the opening device 4 is completed. Moved swivel arm 1 Opened at an acute angle of about 70 ° of the front surface portion f of the corrugated cardboard box H opened in a parallelogram shape close to a rectangle by a pressing means 11 for opening opening provided with a roller-shaped pressing element 11b at the tip of a. The side part close to the corner g is pressed to a right angle in synchronism with the rearward movement of the opening device 4, and the opening device 4 stops moving when the vertical dimension of the corrugated cardboard box is moved. After opening the rectangular rectangular tube, as shown in FIG. 6, the serrated locking plate 6 is lowered and the swinging flaps 7a of the pair of cover piece fighting avoidance devices 7 are moved upward from the horizontally opposed posture. Opening device after swinging 100 ° so that the long lower lid pieces c and d on both sides are slightly opened from the parallel state so as not to interfere with the bottom folding of the front and rear short lower lid pieces a and b. 4 bottom folding plate 4c and the bottom folding provided between the belt of sandwich conveyor 1 The front and rear short lower lid pieces a and b are folded at the bottom by swinging the plate 8 by 90 °, and then the swing flaps 7a of the pair of cover piece fighting avoidance devices 7 are returned and swung as shown in FIG. The cardboard box H is moved to release the expansion of the left and right long lower cover pieces c and d, and then, as shown in FIG. 1, the front and rear short lower cover pieces a and b are placed on and slide on the rib-like rail 9, and the long lower cover on both sides by the bottom folding guides 10 and 10. When the bottom folds of the pieces c and d are performed and then the bottom folding plates 4c and 8 are swung back by 90 °, the cardboard box flat tube S is supplied again.
[0007]
As you can see from the above,
(1) The point of the solution to surely open the cardboard box flat tube that requires a large force to open the cardboard box into a square tube shape is the rear surface of the cardboard box flat tube S. The portion e is sucked and held by the vacuum pad 4b, the corrugated cardboard box flat tube S is slightly tilted forward, and the short lower cover piece a of the front portion is pressed against the sawtooth of the serrated locking plate 6, and then the vacuum pad 4b is used. The rear surface portion e held by suction is moved rearward.
(2) The point of the solution for completely moving the front portion f of the cardboard box to the position corresponding to the sandwiching space of the sandwich conveyor 1 is that the pressing means 11 uses the front portion f of the cardboard box H. The side surface portion close to the corner g opened at an acute angle of about 70 ° is pressed in synchronization with the rearward movement of the opening device 4 until it becomes a right angle.
(3) Before folding the short lower cover pieces a and b to the bottom, expanding one of the long lower cover pieces c and d means that the bottom folding of the short lower cover pieces a and b is the long lower cover on both sides. It is a point that can be done well without fighting with pieces c and d.
[0008]
The sandwich conveyor 1 is driven by a servo motor (not shown). The opening device 4 is coupled to an endless traveling body (timing belt or chain) of a winding device in which a bracket 4f is supported by a slider 4e guided by a linear guide 4d, and the slider 4e is driven to travel by a servo motor (not shown). The bracket 4f is provided with a guide / pressing plate 4a, a vacuum pad 4b, and a bottom folding plate 4c. The guide / pressing plate 4a is urged forward by a spring 4g. The pair of lid piece fighting avoidance devices 7 and 7 are adjusted in distance and height from each other according to the size of the cardboard box H. The floor plate 2 and the serrated locking plate 6 are adjusted in height according to the size of the cardboard box H. The position of the rotation center of the swivel arm 11a is adjusted according to the size of the cardboard box H. The position of the rearward movement stroke of the opening device 4 is adjusted according to the size of the cardboard box H. The position of the drop guide 12 is adjusted according to the size of the cardboard box flat tube S. It is preferable that the pressing element 11b of the pressing means 11 has a roller shape because no trace is left on the outer surface of the cardboard box H.
[0009]
Next, an embodiment included in the technical scope of the present invention will be exemplified in contrast to the above embodiment.
(1) The supply of the cardboard box flat tube S may not be a drop supply.
(2) The bottom folding plate 8 is not provided. Instead, the end of the rail 9 is inclined and lowered, and the bottom folding plate 4c bottom-folds the short lower lid piece b on the rear surface side. Sometimes the front side short bottom cover piece a cannot be folded to the bottom, but when the corrugated cardboard box H opened by advancing the opening device 4 is sandwiched in the sandwich conveyor 1, the rail 9 is inclined and lowered. It is also possible to cause the end portion to bend the short lower lid piece a on the front side.
{Circle around (3)} The lid piece fight avoidance device 7 is sufficient if it has one rather than a pair. The reason is that only one of the long lower cover pieces c and d is expanded, and the bottom fold of the short lower cover pieces a and b does not quarrel (interfere) with the long lower cover pieces c and d on both sides. This is because it was confirmed by the prototype that it could be performed well. In order to shorten the operation time, in the operation process shown in FIG. 4, by pushing up one (right side) cover piece fight avoidance device 7 corresponding to the inner position of the cardboard box H opened in a parallelogram, When the lid piece fighting avoidance device 7 is in the operation process shown in FIG. 5, the long lower lid piece c may be slightly expanded in a direction opposite to the pressing direction of the pressing means 11 for opening assistance. good.
{Circle around (4)} A plurality of serrated locking plates 6 may be provided with a long, thin plate formed with saw teeth at intervals.
(5) The bottom folding of the long lower cover pieces c and d of the cardboard box H is not performed by the bottom folding guides 10 and 10 but at the position sandwiched between the sandwich conveyors 1 shown in FIG. After the drive of 1 is stopped, bottom folding may be performed by a pair of long lower lid single bottom folding devices.
(6) Maintenance of the state in which the bottom of the cardboard box H is closed may be achieved by any of tape sticking, hot melt bonding, and stitcher needles.
[0010]
【The invention's effect】
As described above, according to the cardboard box manufacturing method of the first invention of the present application and the second invention of the present application, even a flat cylinder for cardboard boxes that requires a large force to open the cardboard paper into a thick rectangular tube shape. Since the short lower lid piece on the front side of the cardboard box can be locked so as not to be pulled backward at the start of opening, the trigger for opening can be secured, and the short lower lid on the front side of the cardboard box can be secured even while the opening is in progress. It is guaranteed to slide sideways while preventing the piece from being pulled backward, and the side part of the cardboard box is pushed from the latter half of the opening process, so that it becomes a rectangular rectangular tube shape when seen in the plane direction. It can be opened reliably. Then, the short lower lid piece on the front side of the cardboard box is slidably latched by the serrated locking plate so that relative movement in the dentition direction between the short lower lid piece and the serrated locking plate does not occur. Therefore, the short lower cover piece is not scraped off by the serrated locking plate, and a large amount of dust can be prevented from accumulating on the floor surface inside the machine.
Furthermore, according to the box making method of the cardboard box of the second invention of the present application, at least one of the pair of left and right before opening the front and rear short lower cover pieces after opening the flat tube for the cardboard box into a rectangular tube shape. Since one long lower lid piece was slightly expanded, the front and rear short lower lid pieces were placed on both sides of the flat cylinder for cardboard boxes that required a large force to open the cardboard paper into a thick rectangular tube. The bottom can be reliably folded without quarreling with the lower cover piece.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 relates to a corrugated board box making apparatus adopting a corrugated board box making method according to an embodiment of the present invention, wherein (a) is a plan view of a process for supplying a corrugated cardboard box flat tube; Is a front view.
FIG. 2 is a plan view showing the next step of FIG. 1 (a) and showing a state in which a flat cylinder for a cardboard box is sucked with a vacuum pad, and (b) is a front view.
FIG. 3 is a plan view showing the next step of FIG. 2 (a), in which the vacuum pad is moved rearward and the cardboard box flat tube is opened into a parallelogram;
FIG. 4 shows the next step of FIG. 3, in which the vacuum pad moves backward to the end point straight, the cardboard box flat tube opens to a state close to a rectangle, and the opening opening pressing means presses The top view which shows the state which started.
FIG. 5 is a plan view showing the next step of FIG. 4 in which the vacuum pad stops moving backward and the lid piece fighting avoidance device slightly expands the left and right long lower lid pieces of the cardboard box. Figure.
6 is a plan view showing the next step of FIG. 5 and showing a state in which the vacuum pad remains stopped and the short lower cover pieces before and after the corrugated cardboard box are folded to the bottom. FIG.
FIG. 7 is a plan view showing the next step of FIG. 6 and showing a state in which the vacuum pad has stopped moving backward and the left and right long lower cover pieces of the cardboard box are unexpanded.
8 shows the next step of FIG. 7, in which the vacuum pad moves forward and the cardboard box is sandwiched between the belts of the sandwich conveyor 1, and the left and right long lower lid pieces of the cardboard box The top view which shows the state which has started the bottom folding.
[Explanation of symbols]
S: Flat tubes a, b for cardboard boxes Short lower cover pieces c, d before and after the flat tube for cardboard boxes Long left cover pieces e on the left and right of the flat tube for cardboard boxes The rear surface portion f of the flat tube for the corrugated cardboard box ... The front surface portion H of the flat tube for the corrugated cardboard box ... The opened corrugated cardboard box 1 ... The sandwich conveyor 2 ... The floor board 4b ... The vacuum pad 4c ...・ Bottom folding plate 6 ... serrated locking plate 7 ... lid piece fight avoidance device 11 ... pressing means

Claims (2)

A flat cylinder for cardboard boxes is supplied upright on the upstream side of the sandwich conveyor, opened in a rectangular rectangular tube shape when viewed in the plane direction, and folded to the sandwich conveyor before and after folding the short lower and lower cover pieces corresponding to the conveyor conveyance direction. In the box making method for cardboard boxes, which is then inserted and then the bottom cover pieces on both sides are folded to the bottom.
The step of supplying the flat cardboard box flat tube is configured to supply on the floor plate in a standing state and to correspond to the sandwiching space of the sandwich conveyor provided on the front side in the conveyor sandwiching direction of the rear surface portion of the flat cardboard box cylinder Yes,
The step of opening the corrugated cardboard box flat tube into a rectangular tube shape is made by slightly projecting the serrated locking plate whose tooth row direction coincides with the conveyor insertion direction on the floor plate and the rear surface portion of the cardboard box flat tube. The vacuum pad is sucked and held and the flat cylinder for the corrugated cardboard box is slightly tilted forward, and the short lower lid piece of the front portion is pressed against the saw teeth of the serrated locking plate so that the front portion is inserted in the sandwich conveyor direction. Disables the movement in the opposite direction, and then moves the vacuum pad in the direction opposite to the sandwiching direction of the sandwich conveyor and sucks and holds the rear surface portion held by the vacuum pad in the direction opposite to the longitudinal feed direction. It moves only in the vertical dimension, causing the front part to move laterally to a position corresponding to the sandwiching space of the sandwich conveyor and gradually opening it into a rectangular tube shape. It is configured to open in the shape of a rectangular square tube as seen in the plane direction by pressing the side part close to the acutely open corner of the front part until it reaches a right angle by the pressing means just before the end of the movement of the vacuum pad. A feature is the box making method of cardboard boxes. A flat tube for cardboard boxes is supplied to the upstream side of the sandwich conveyor, opened in a rectangular rectangular tube shape when viewed in the plane direction, and the short bottom lid pieces before and after being folded at the bottom before being sandwiched in the sandwich conveyor, In the box making method of the cardboard box, which folds the long lower lid piece to the bottom,
The step of supplying the flat cardboard box flat tube is configured to supply on the floor plate in a standing state and to correspond to the sandwiching space of the sandwich conveyor provided on the front side in the conveyor sandwiching direction of the rear surface portion of the flat cardboard box cylinder Yes,
The step of opening the corrugated cardboard box flat tube into a rectangular tube shape is made by slightly projecting the serrated locking plate whose tooth row direction coincides with the conveyor insertion direction on the floor plate and the rear surface portion of the cardboard box flat tube. The vacuum pad is sucked and held and the flat cylinder for the corrugated cardboard box is slightly tilted forward, and the short lower lid piece of the front portion is pressed against the saw teeth of the serrated locking plate so that the front portion is inserted in the sandwich conveyor direction. Disables the movement in the opposite direction, and then moves the vacuum pad in the direction opposite to the sandwiching direction of the sandwich conveyor and sucks and holds the rear surface portion held by the vacuum pad in the direction opposite to the longitudinal feed direction. It moves only in the vertical dimension, causing the front part to move laterally to a position corresponding to the sandwiching space of the sandwich conveyor and gradually opening it into a rectangular tube shape. By pressing until the right angle by pressing means side portion near the corner open at an acute angle of the front portion than the movement near the end of the vacuum pad it will be configured to open in a rectangular square tube shape when viewed in the planar direction,
As a step before the front and rear short lower cover pieces are folded to the bottom after the cardboard box flat tube is opened into a rectangular tube shape, at least one of the long lower cover pieces on both sides is folded to the bottom of the front and rear short lower cover pieces. A box making method for cardboard boxes, characterized in that it is configured to be slightly opened so as not to interfere.

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