JP4558418B2 - Box stacking device - Google Patents

Description

  The present invention relates to a box stacking device in which flat boxes are formed from corrugated cardboard sheets on which folding ruled lines and joining margins are formed and stacked in a piled state.

  In a production line for forming a flat box for forming a cardboard box from a rectangular cardboard sheet in which two parallel horizontal ruled lines are put, for example, as described in Patent Document 1, the printer slotter A cardboard sheet is printed, and vertical ruled lines are laid at right angles to the horizontal ruled lines, and a slot is provided to form a blank for forming a cardboard box, and the blank is supplied to the folder gluer. The panel at both ends of the blank is bent approximately 180 ° along the vertical ruled line formed between adjacent panels while the blank is transferred, and the joining margin formed at the edge of one panel and the edge of the other panel The overlapping portion is adhered by an adhesive applied to the joining margin so as to form a flat box.

  In addition, the flat box discharged from the folder gluer is dropped onto the stock part provided downstream of the folder gluer to be stacked and shaped, and the counter ejector is continuously attached one by one from the lower end of the stock part. The boxes are sequentially stacked from the bottom while being counted by the counter ejector, and when the set number of boxes are stacked, the stacked boxes are transported to the binding section provided on the downstream side and tied. We are trying to unite with.

  In the flat box production line as described above, when forming a box forming blank in a printer slotter, a feeding error may occur due to the corrugated cardboard sheet being sent with an inclination. Printing mistakes occur when printing and punching errors occur when forming slots.

  Since the flat box formed by the blank in which these mistakes have occurred is a defective product, it is necessary to remove the defective product from the conveying line.

  Also, when forming a flat box body by folder gluer, a feeding error may occur in the blank, and the blank cannot be bent with high accuracy, and a bending error occurs. Also, when applying adhesive to the blank joint allowance, there may be excess or deficiency in the amount applied, and when the amount of adhesive applied is small, the bond between the joint allowance and the panel is insufficient and will peel off. On the other hand, in the case where there are many, there is a possibility that the adhesive protrudes to the periphery, contaminates the periphery of the joining allowance, or adheres to the overlapping boxes when the flat boxes are stacked in the hopper.

  Therefore, when these mistakes occur, the box becomes a defective product, and it is necessary to remove the defective product from the transport line.

  Here, it is extremely difficult for an operator to find a blank in which a printing error or the like has occurred or a box in which bending failure or adhesion has occurred in the manufacturing process of the box, and the defective box cannot be reliably excluded. Can not.

  Therefore, in the invention described in Patent Document 1, a detection sensor that detects a sheet feeding error, a detection sensor that detects a printing misalignment, a detection sensor that detects a punching defect, and the like on the sheet transfer path of the printer slotter and the folder gluer. These detection sensors are provided, and when each of these detection sensors detects a defective sheet or a defective box, a defective box discharge pusher is operated to remove the defective box from the production line.

  In this case, in Patent Document 1, a discharge pusher is provided at the discharge portion of the stack box that is discharged from the counter ejector, and all the stack boxes that are mixed with defective boxes are removed from the production line by the discharge pusher. A plurality of non-defective boxes are also taken out together with the defective boxes, and it is necessary to return the non-defective boxes to a predetermined number on the production line, which causes a problem of post-processing. Also, it takes a lot of work to find and remove the defective box from the piled state.

  In order to solve such problems, in the box stacking apparatus described in Patent Document 2, a defective box body removing device is provided on the upper downstream side of the stock portion, and the defective box body is removed from the carry-out end of the folder gluer. When unloaded, the defective box is received by the defective box removing device and removed downstream.

  Moreover, in the box stacking apparatus described in Patent Document 1, the boxes that are carried out one by one from the lower part of the stock part are stacked and stacked from below by the counter ejector in the next process, and the stacking is continued. In this state, the delivery pusher is moved to push the set number of boxes at the top of the stack to the bundling section, so the number of boxes pushed out by the delivery pusher may be excessive or insufficient, and the exact number of boxes There was an inconvenience that the body could not be reliably conveyed to the binding unit.

  Also, when holes such as hand holes exist in the lower part of the box, the box will be caught when the boxes are stacked from below or when a set number of boxes are pushed out by the pusher. In some cases, the box was damaged or proper extrusion was not possible.

  Furthermore, since there is a counter ejector between the stock part and the bundling part, there is also a disadvantage that the apparatus becomes large.

  These inconveniences are the same in the case of the apparatus according to Patent Document 2. That is, these inconveniences are peculiar to an apparatus that individually has a stock section for stacking and shaping boxes and a counter ejector for transporting the boxes transported from the stock section as a predetermined number of stacks.

  In order to eliminate the inconveniences as described above, in the box stacking apparatus described in Patent Document 3, the boxes transported from the folder gluer are sequentially shaped in the stock section provided on the downstream side of the folder gluer. Each time the stacked boxes reach a set number, the set number of boxes are transported toward the binding portion provided on the downstream side, and the counter described in Patent Document 1 The ejector is omitted.

Here, in the stock portion, a box housing portion is provided between the front guide and the back guide, and the box bodies that are carried out from the carry-out end of the folder gluer to the housing portion are stacked by stacking means, and a set number of box bodies are obtained. When a plurality of boxes are stacked, the set number of boxes are sent out onto the carry-out conveyor and conveyed downstream.
JP-A-9-165124 JP 2004-26391 A JP 2004-217390 A

  By the way, in the box stacking apparatus described in Patent Document 3 which can make the installation of the counter ejector unnecessary, there is no description about removal of defective boxes.

  Further, in the box stacking device described in Patent Document 3, since a part of the stacking means for stacking a set number of boxes is provided on the downstream side of the front guide, the downstream side of the front guide is provided. There is no space for installing a defective box removing device as described in Patent Document 2, and the defective box removing device described in Patent Document 2 cannot be adopted when removing the defective box. .

  For this reason, if the defective box is to be removed, a discharge pusher similar to that described in Patent Document 1 is provided at the discharge portion from which a set number of pile boxes are discharged from the stock portion, It is necessary to remove all of the non-defective box and the defective box from the transfer line of the non-defective box, resulting in the same inconvenience as that described above in Patent Document 1.

  An object of the present invention is to separate a counter ejector that can pile up and shape a set number of boxes in the stock section, and prevent a defective box from being mixed into boxes that are piled up and shaped. It is to provide a box stacking device that is not required as a station.

In order to solve the above problems, in the present invention, a box forming blank made of corrugated cardboard sheets is conveyed in one direction while being bent at both ends of the blank, and provided at the edge of one panel. A folder gluer that forms a flat box by bonding the joint margin and the overlapping portion of the end of the other panel, and a stock portion provided downstream of the folder gluer, the stock portion However, a stacking means for stacking the box bodies sequentially transported from the folder gluer in the storage section formed between the front guide and the back guide in a set number of stacked states, and transporting the set number of stacked box bodies to the downstream side. A stacking device for a box body provided so that a part of the stacking means is located on the downstream side of the front guide. Between the unloading end and the stock portion of the luer, the non-defective box body conveyed toward the stock portion of the downstream side, defective box body comprising a swingable dispensing belt divided or transport line we bad box A removal device, a detection sensor that detects a defective box at the carry-out end of the folder gluer, a defect inspection device that detects a defective box at a position upstream of the detection sensor, and a control of the defective box removal device And a control unit that starts a detection operation on the detection sensor after a lapse of time from when the defect inspection apparatus detects a defective box until the defective box reaches a position immediately before the detection sensor. When the defective box is conveyed to the position of the detection sensor and the detection sensor detects the defective box, the defective box is conveyed based on a defect detection signal input from the detection sensor to the control unit. Line Than it is adopted a structure which is adapted to remove the bad box downwardly before a pile state the box is inclined with downward gradient towards the discharge end by swinging the payout belt to be removed .

  As described above, a defective box body is provided between the carry-out end of the folder gluer and the stock section, and the defective box body is based on a defect detection signal input to a control unit that controls the defective box body removal apparatus. Since the defective box body removing device is operated so that it is removed from the production line when it is sent to the defective box body removing apparatus, it is possible to prevent the defective box bodies from being piled up in the stock part, Only a set number of non-defective boxes can be stacked in the stock section.

  For this reason, work such as removing defective boxes from a set number of stacked boxes can be made unnecessary.

  In addition, since a set number of non-defective boxes can be stacked and conveyed downstream in the stock section, the counter ejector is not required as a separate station, and the box stacking apparatus can be downsized.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a box production line that employs a box stacking apparatus according to the present invention. A folder gluer 10 is provided on the downstream side of the printer slotter 1, and a defective box removing device is provided on the downstream side of the folder gluer 10. 20 and the stock part 30 are provided in order.

A cardboard sheet S ₁ shown in FIG. 3I is supplied to the printer slotter 1. The cardboard sheet S ₁ has two parallel horizontal ruled lines a ₁ and a _{2. When the} cardboard sheet S ₁ is supplied to the printer slotter 1, the printer slotter 1 performs appropriate printing on the cardboard sheet S _1. At the same time, the first vertical ruled line b _{1 to} the fourth vertical ruled line b ₄ are ruled at right angles to the horizontal ruled lines a ₁ and a ₂ and a slot is formed to form a cardboard box shown in FIG. 3 (II). to form a blank S _2.

Here, the blank S ₂ has four panels P _{1 to} P ₄ divided by the first vertical ruled line b _{1 to} the fourth vertical ruled line b ₄ , and a joining margin is provided at the edge of the panel P ₄ at one end. P ₅ is formed. This blank S ₂ is supplied to the folder gluer 10.

The folder gluer 10 has an upper conveyor belt 11 and a lower conveyor belt 12 provided below the upper conveyor belt 11. The upper conveyor belt 11 and the lower conveyor belt 12 convey the blank S ₂ downstream. The first panel P ₁ and the fourth panel P ₄ at both ends of the blank S ₂ shown in FIG. 3 (II) are bent downward by approximately 90 ° by contact with the folding bars 13 provided on both sides of the conveyance path. At the same time, the first panel P ₁ and the fourth panel P ₄ which have already been bent by approximately 90 ° by the panel bending belt 14 provided on the downstream side of each folding bar 13 are further bent by 90 °, and the joining allowance P The overlapping portion of ₅ and the first panel P ₁ is bonded by an adhesive applied to the bonding allowance P ₅ to form a flat box S ₃ .

FIG. 3 (III) shows a flat box S ₃ formed by the folder gluer 10. This box S ₃ is sent to the defective box removing apparatus 20.

  As shown in FIG. 2, the defective box body removing device 20 includes an upper belt 21, a payout belt 22 provided below the upper belt 21, and a feed belt 23 provided downstream of the payout belt 22. The discharge belt 22 is swingable in a direction in which the carry-out end portion moves up and down around the carry-in end portion, and is swung by a cylinder 24 connected to the carry-out end portion. .

Here, the cylinder 24 is controlled by the control unit 25. The control unit 25 operates the cylinder 24 based on the failure signal input from the detection sensor PH ₁ for detecting the defective box body provided at the carry-out end of the folder gluer 10 until the boxes S ₃ are piled up. In addition, the defective box S ₃ is removed downward by the payout belt 22. This detection sensor PH ₁ is used for various defect inspection devices 26 provided in the sheet conveyance path of the printer slotter 1 and the sheet conveyance path of the folder gluer 10 to detect a defective blank S ₂ in which a printing error or a slot formation error has occurred, or The detection operation is started after a lapse of time from when the defective box S _{3 in} which the blank S ₂ is bent or bonded is detected until the defective box S ₃ reaches the position immediately before the detection sensor PH _1. When the detection sensor PH ₁ detects the defective box S ₃ , the defect detection signal is output to the control unit 25.

When the defect inspection device 26 detects the defect blank S ₂ or the defect box S ₃ , the defect blank S ₂ or the defect box S ₃ is marked, and when the detection sensor PH ₁ detects the mark, A defect detection signal may be output to the control unit 25.

The stock unit 30 stacks a box body S ₃ between a box conveyance belt 31 as a discharge conveyor, a front guide 32 provided on a loading end of the box conveyance belt 31, and the front guide 32. A back guide 34 that forms a housing portion 33 that can be housed in a state, and a stacking means X that stacks a set number of box bodies S ₃ in the housing portion 33 between the front guide 32 and the back guide 34 and feeds them onto the box body conveyor belt 31. The stacking means X is provided below the temporary receiving table 35 and a temporary receiving table 35 that can be moved back and forth from the downstream side of the front guide 32 with respect to the accommodating portion 33 and that can be moved up and down. The lift table 36 is movable up and down, and a part thereof is provided on the downstream side of the front guide 32.

Note that the distance between the front guide 32 and the back guide 34 is substantially the same as the dimension in the transport direction of the box S ₃ that is sent, and the panel P ₁ and the joining margin P ₅ are not completely bonded. The box body S ₃ sent in the state is shaped.

  Here, as shown in FIG. 4, the temporary receiving table 35 is positioned at the downstream side of the front guide 32 (A) as the standby position, and advances from the standby position (A) to the upstream side. As shown in FIG. 5, the position (B) where the tip part faces the storage part 33 is the forward stop position, descends from the forward stop position (B), and the position (C) indicated by the chain line in FIG. From the lowered position (c), it moves backward to the position (d) indicated by the chain line in FIG. 4 and rises from the retracted stop position (d) to return to the standby position (b). Yes.

  On the other hand, the lift table 36 has the position (e) shown in FIG. 4 as the upper limit position, descends from the upper limit position (e), and falls below the conveyance surface of the box conveyance belt 31 as shown in FIG. The position is the lower limit position (f).

  A mechanism for performing the above-described operation of the temporary receiving table 35 and the lifting table 36 of the stacking means X is provided on the downstream side of the front guide 32 and above the box conveyance belt 31.

  Such a configuration of the stock unit 30 and the stacking means X is the same as the conventional box stacking device disclosed in Patent Document 3 that does not require a counter ejector as a separate station.

Each of the temporary receiving table 35 and the lifting table 36 is controlled by the control unit 25. On the other hand, the control unit 25 controls the temporary receiving table 35 and the lifting table 36 based on a signal input from the counter 27. The counter 27 outputs a signal to the control unit 25 based on a signal input from a sensor PH ₂ provided at the carry-out end of the defective box removing device 20.

Here, the sensor PH ₂ is adapted to detect the passage of the box S _3, the detection signal to the counter 27 each time the sensor PH ₂ detects the passage of the box S ₃ is output. The counter 27 counts the box S ₃ by a signal input from the sensor PH ₂ , and outputs a signal to the control unit 25 when the counted value matches a preset value input in advance.

Based on the signal input from the counter 27, the control unit 25 repeatedly performs the following first to fourth operations on the temporary receiving table 35 and the lifting table 36 to set the number of stacked boxes on the box conveyor belt 31. shape the body S _3, and then supplied.

The first operation: the lifting table 36 receives a box body S ₃ non-defective is carried out from the upper limit position (E) poor box body removal device in a state of stopping at 20 shown in FIG. 4, the box body S ₃ is the elevation table 36 The lift table 36 is lowered every time it is received.

Second operation: When the set number of non-defective box body S ₃ on the lifting table 36 stacked forward stop position indicating the temporary supporting table 35 is stopped at the standby position of FIG. 4 (a) by the solid line in FIG. 5 (b ), And the temporary receiving table 35 supports the succeeding good box S ₃ carried out from the defective box removing device 20 by the temporary receiving table 35, and the lifting table 36 is conveyed by the box conveying belt 31. lower limit position below the surface perform the piled delivery set number of the box body S ₃ between the box-conveyor belt 31 is lowered to (f).

Third Operation: When the box conveyor belt 31 good box body S ₃ set number by is conveyed to the downstream side, raising the elevating table 36 to the upper limit position indicated by the solid line in FIG. 4 (e), the lower limit position (C A plurality of pile boxes S ₃ are transferred to and from the temporary receiving table 35 that is lowered to), and the support of the non-defective box S ₃ discharged from the defective box removing device 20 is continued by the lifting table 36. .

  Fourth operation: The temporary receiving table 35 that has been lowered to the lower limit position (c) is retracted to the retracted position (d) indicated by the chain line in FIG. 4, and after that stop, it is raised and raised to the standby position (a) for standby. .

The box stacking apparatus shown in the embodiment has the above-described structure, and the blank S ₂ carried out from the printer slotter 1 is supplied to the folder gluer 10.

The blank S ₂ is transported to the downstream side while being sandwiched from above and below by the upper transport belt 11 and the lower transport belt 12, and during the transport, the panels P ₁ and P _{4 at} both ends are brought into contact with the folding bar 13. There gradually with bent approximately 90 ° fold in the folded finally downwards, then bent further 90 ° folding the panel folding belt 14, bonding margins P ₅ and the end portion of the first panel P ₁ overlapping portion of, is bonded flat box S ₃ is formed by a previously applied adhesive to the bonding allowance P _5.

The flat box S ₃ formed by the folder gluer 10 is fed into the defective box removing device 20 from the carry-out end of the folder gluer 10, and the defective box S ₃ is piled together with the good box S _3. In addition, the defective box body removing device 20 removes it downward.

If the box S ₃ fed to the defective box body removing device 20 is non-defective box body S _3, from above and below the defective box body S ₃ is in the upper belt 21 and the payout belt 22 and the outfeed belt 23 that is provided on the lower side It is held and conveyed downstream, and sent to the stock unit 30.

At this stage, the first panel P ₁ of the box S ₃ and the end of the joining margin P ₅ are not completely bonded.

The good box S ₃ sent to the stock unit 30 falls in the accommodation unit 33 by the contact with the front guide 32 and is supported by the lifting table 36. At this time, since the adhesion of the box S ₃ is still incomplete, it is shaped into a rectangular shape by the front guide 32 and the back guide 34.

When the elevating table 36 a set number of non-defective box body S ₃ on are heaped, box for temporary supporting table 35 is unloaded from the forward stop position (B) moves to the defective box body removing device to 20 shown in FIG. 5 with receive S ₃ continues stacking box body S _3, the elevating table 36 is lowered to the lower limit position shown in FIG. 5 (f), setting the number of non-defective between its lifting table 36 and the box conveyor belt 31 carry out the delivery of the box S _3.

Pile good box body S ₃ set number supported by the box conveyor belt 31 is bundled are transported to the bundling unit (not shown in the figure) on the downstream side by the box-conveyor belt 31.

When pile good box body S ₃ set number by the box conveyor belt 31 is eliminated from the upper lifting table 36 is conveyed to the downstream side, and raised to the lift table 36 is the upper limit position shown in FIG. 4 (e), When the pile box S ₃ is delivered to and from the temporary receiving table 35 and the pile box S ₃ is supported by the lifting table 36, the temporary receiving table 35 is moved to the position (d) indicated by the chain line in FIG. The vehicle moves backward, rises after the backward stop, and rises to a standby position (A) indicated by a solid line in FIG.

Thereafter, the above-described operation is repeated, and a set number of stacked good product boxes S ₃ are sequentially supplied onto the box transport belt 31.

In the manufacture and stacking of the box body S ₃ as described above, when the blank S ₂ is formed by the printer slotter 1, there may be a case where a defective blank S ₂ is formed due to printing misalignment or slippage. Also, the folder gluer 10 blank S ₂ is when formed into the box S _3, sometimes bending failure and adhesion failure due to the poor box body S ₃ of the blank S ₂ is formed. When the defect inspection apparatus 26 shown in FIG. 2 detects a defective blank S ₂ or a defective box S ₃ , the defect inspection apparatus 26 outputs a defect signal to the control unit 25. Based on the input failure signal, the control unit 25 causes the detection sensor PH ₁ to start a detection operation after a lapse of time until the defective box S ₃ reaches the position immediately before the detection sensor PH ₁ .

Bad box member S ₃ is transported to the position detection sensor PH _1, when the detection sensor PH ₁ detects a defective box body S _3, bad signal to the control unit 25 from the detection sensor PH ₁ is output. The control unit 25 an actuation signal is output to the cylinder 24 on the basis of a defective signal inputted from the detection sensor PH _1, lowering the discharge end of the payout belt 22 by actuating the cylinder 24 by the actuation signal. As a result of the lowering, the payout belt 22 is held in a state of being inclined downward toward the carry-out end, and the defective box S ₃ discharged from the carry-out end of the folder gluer 10 is piled together with the non-defective box S _3. Before being carried, it is transported by the payout belt 22 and removed from the transport line.

If the next box body S ₃ that follows the defective box body S ₃ is a box body S ₃ of good, the control unit 25 raises the discharge end of the payout belt 22 by operating the cylinder 24, a box of good payout belt 22 The body S ₃ is held in a state where it is fed toward the stock unit 30.

Thus, when the detection sensor PH ₁ detects a defective box body S _3, since so as to tilt with a descending slope towards the discharge end of the dispensing belt 22, together with non-defective box body S ₃ in the stock portion 30 the defective box body S ₃ before being heaped can automatically remove it from the conveyor line of the non-defective box body S ₃ of the.

For this reason, the defective box S ₃ is not sent to the stock portion 30 and stacked, and the post-processing work of removing the defective box S ₃ from the stacked boxes S ₃ is not required. Can do.

Incidentally, stacking means X is not limited to the above embodiments, a portion is provided to be positioned on the downstream side of the front guide 32, configuration can be stacked good box body S ₃ set number If it is a thing.

Schematic of a box production line that employs a box stacking apparatus according to the present invention The front view which expands and shows the defective box removal apparatus of FIG. (I) is a perspective view showing a cardboard sheet, (II) is a perspective view showing a blank formed by the cardboard sheet, and (III) is a perspective view showing a box formed from the blank. Front view of box piled up by stock part Front view showing the state of payout of boxes stacked by the stock unit

Explanation of symbols

S ₂ blank S ₃ box 10 folder gluer 20 defective box removing device 25 control unit 30 stock unit 31 box conveyor belt (discharge conveyor)
32 Front guide 33 Housing 34 Back guide 35 Temporary receiving table 36 Lifting table

Claims (1)

While conveying a box forming blank made of corrugated cardboard in one direction, bending the panels at both ends of the blank, and joining the joint margin provided at the edge of one panel and the overlap of the end of the other panel A folder gluer that forms a flat box by bonding, and a stock portion provided on the downstream side of the folder gluer, wherein the stock portion is formed between the front guide and the back guide. A stacking means for stacking the boxes sequentially transported from the folder gluer in a set number of stacked states, and a discharging means for transporting the stacked set number of stacked boxes to the downstream side, a part of the stacking means being In the box stacking device provided to be located downstream of the front guide,
Between the unloading end and the stock portion of the folder gluer, conveying the good box body toward the stock portion of the downstream failure with a swingable dispensing belt which carried the line or we divided defective box A box removing device, a detection sensor for detecting a defective box at the carry-out end of the folder gluer, a defect inspection device for detecting a defective box at a position upstream of the detection sensor, and the defective box removing device A control unit for controlling the detection sensor, and the control unit performs a detection operation on the detection sensor after a lapse of time from when the defect inspection apparatus detects the defective box to the position immediately before the detection sensor. When the defective box is conveyed to the position of the detection sensor and the detection sensor detects the defective box, the defective box is boxed based on a defect detection signal input from the detection sensor to the control unit. body That was so that to remove the defective box downwardly before a pile state the box is inclined with downward gradient towards the discharge end by swinging the payout belt to be removed from the feed line A box stacking device.

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