JP2004001827A - Opener for folding carton - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact opener for a folding carton which can surely open the carton without causing deformation such as a warp and a bend on the folding carton. <P>SOLUTION: The opener for the folding carton includes an extracting head 38 linearly advancing toward/retreating from a carton hopper 26 for extracting folding cartons Cf one by one from the carton hopper 26 by its extracting pad 62, a reception head 70 for receiving the folding carton Cf from the head 38 via a reception pad 84 at the transfer position for making a crease for opening on the carton Cf in cooperation with the extracting head 38, and a box opening arm 90 for pressing the carton Cf from above when the reception head 70 lowers toward a bucket of a bucket conveyer for opening the folding carton Cf. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a folding carton opening device called a so-called one-touch carton.
[0002]
[Prior art]
This type of box opening device is disclosed in, for example, Japanese Patent Laid-Open Nos. 56-4524 and 2001-88809. All of these known box opening devices use an extraction rotor, and the extraction rotor is provided with a plurality of extraction heads having extraction pads. Each extraction head passes through the outlet of the carton hopper as the extraction rotor rotates, and at this time, the folding carton is adsorbed and extracted from the carton hopper by the extraction pad.
[0003]
After that, in the former box opening device, the folding cartons are moved in the circumferential direction of the extraction rotor together with the extraction head, and the extraction pads cooperate with the auxiliary pads as needed on both sides of the folding cartons. Pull the folding carton to open it and then insert it into the bucket of the bucket conveyor. At the time of this insertion, the raising lever of the extraction head, that is, the box opening arm presses the folding carton from the side to completely open the folding carton.
[0004]
On the other hand, the latter box opening device further includes a receiving rotor in addition to the extraction rotor, and the receiving rotor is provided with a plurality of receiving heads having receiving pads. The receiving head sucks and receives the folding carton from the extraction pad with the receiving pad, and at this time, the folding carton is pulled to both sides by the extraction pad and the receiving pad to open the box. After this, the receiving head inserts the folding carton into the bucket of the bucket conveyor from the side as in the former box opening device, and the opening (opening) arm opens the folding carton completely.
[0005]
[Problems to be solved by the invention]
Since all of the conventional box opening devices described above use a rotating rotor consisting of an extraction rotor and a receiving rotor, the higher the rotational speed of the rotating rotor, the more the supply of folding cartons from the carton hopper to the bucket conveyor. There is an advantage that the speed can be easily increased.
[0006]
In this case, since the peripheral speed of the rotating rotor is also increased, an excessive inertial force acts on the folding carton, and this inertial force causes the folding carton to bend and warp during the transfer of the folding carton. Such bending and warping of the folding carton may cause the box opening operation to be unstable, and there is a possibility that the folding carton in which the box opening is incomplete will be inserted into the bucket of the bucket conveyor.
[0007]
On the other hand, since the radius corresponding to the size of the folding carton is required for the above-described rotating rotor, the larger the size of the folding carton to be opened, the larger the size of the box opening device. Further, as the size of the folding carton changes, the suction position of the extraction pad and the receiving pad with respect to the folding carton must be adjusted. However, the adjustment of the suction position of the pad is not easy in the above-described rotary type box opening device.
[0008]
The present invention has been made based on the above circumstances, and its purpose is to stably perform the box opening operation without causing undesired bending or warping of the folding carton during transfer from the carton hopper. An object of the present invention is to provide a compact box opening device that can be performed and that can easily cope with a size change of a folding carton.
[0009]
[Means for Solving the Problems]
The present invention includes a carton hopper for storing folded cartons in a row in a horizontal direction, and a receiving bucket that is disposed below the carton hopper and that can receive an open carton that is opened from the folded carton, from the carton hopper A box opening device for opening a folding carton in the process of transferring the folding carton to a receiving bucket. In order to achieve the above-described object, the box opening device of the present invention has the following configuration.
[0010]
That is, the box opening device of claim 1 includes an extraction pad that linearly moves forward and backward with respect to the outlet of the carton hopper, and sucks and extracts one folded carton from the outlet, and withdraws together with the extraction pad. A pull-out head that holds the folding carton at a delivery position defined above the receiving bucket, and a linear carton that moves up and down linearly between the delivery position and the receiving bucket. And a receiving pad that cooperates with the extraction pad and pulls the folding carton to both sides to open the folding carton and attaches the folds to the folding carton. After that, the suction of the folding carton by the extraction pad is released from the delivery position. Receipt that descends toward the receiving bucket and inserts the folding carton sucked and held by the receiving pad into the receiving bucket When the receiving head descends from the delivery position toward the receiving bucket, it rotates from the vertical position to the horizontal position and presses the folding carton with an open ridge from above to open it. And an opening arm for boxing.
[0011]
According to the above box opening device, the extraction head is linearly moved forward and backward to attract and extract the folding carton in the carton hopper with the extraction pad, and the extracted folding carton is delivered to or near the delivery position. Transport.
On the other hand, at the delivery position, the receiving head sucks the folding carton with the receiving pad, pulls the folding carton to both sides in cooperation with the extraction pad, and attaches an open ridge to the folding carton. That is, at this point, the folding carton is partially opened. Specifically, the retraction of the extraction head is used for the open brazing here.
[0012]
Thereafter, in a state where the suction of the folding carton by the extraction pad is released, the receiving head moves down from the delivery position toward the receiving bucket together with the folding carton sucked and held by the receiving pad. At this time, the box opening arm is rotated from the vertical posture to the horizontal posture, and the folding carton with the opening hook is pressed from above to further open the box. Therefore, the folding carton is inserted into the receiving bucket in a completely opened state, and is sandwiched between the bottom of the receiving bucket and the opening arm, and the opened state is stabilized.
[0013]
The box opening device may further include a lateral movement means for linearly reciprocating the extraction head to the side of the carton hopper. The lateral movement means is configured to remove the folding head after the folding carton is removed. Is moved to the vicinity of the delivery position defined in (2). According to such a box opening device, the advancing / retreating direction of the extraction head for extracting the folding carton and the raising / lowering direction of the receiving head exist in different vertical planes, so that the receiving is performed during the extraction operation of the folding carton by the extraction head. The head can move from the receiving bucket to the delivery position.
[0014]
The box opening device may further include a head adjusting means for adjusting the mounting position of the receiving head relative to the lifting cylinder up and down (Claim 4), and the extraction head moves the suction position of the extraction pad up and down relative to the folding carton. It is possible to further include pad adjusting means for adjusting to (Claim 5). If such an adjusting means is provided, the receiving and extraction pad can adsorb the proper position of the folding carton according to the size of the folding carton, and can attach a stable opening fold to the folding carton.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a carton stuffing machine for accumulating a predetermined number of flat products such as retort packs and then storing the accumulated products in a folding carton.
Such a carton filling machine includes a product conveyor 2, and the product conveyor 2 intermittently supplies individual products P to the product stacking unit 4 at a predetermined interval. A part of the product conveyor 2 is also configured as an exclusion conveyor 6, and when the defective product P passes, the exclusion conveyor 6 rotates downward to exclude the defective product P from the product conveyor 2.
[0016]
The product accumulation unit 4 accumulates a predetermined number of products P from the product conveyor 2 to form an integrated product G. Thereafter, the integrated product G is supplied to a product storage position by a pusher (not shown) and pushed out toward the carton Co that is already in an open box, and is stored in the carton Co.
Here, when one bucket of the bucket conveyor is positioned as a receiving bucket at a box opening receiving position, the carton Co is inserted into the receiving bucket from a box opening device described later. Thereafter, the receiving bucket is intermittently conveyed toward the product accommodation position.
[0017]
FIG. 2 shows the bucket conveyor 8 described above, and the bucket conveyor 8 has a pair of endless conveying chains 10. Each of these transport chains 10 is wound in parallel between a drive and a driven sprocket (not shown) and travels in synchronization with one direction. A plurality of buckets 12 are provided in the pair of transport chains 10, and these buckets 12 are arranged at predetermined intervals in the traveling direction of the transport chain 10. More specifically, each bucket 12 is composed of four prisms 14 that define the corners, and two prisms 14 in the front and rear are attached to each transport chain 10. The front and rear prisms 14 on the same transport chain 10 are folded back so that the lower ends thereof face each other to form the bottom walls of the four corners of the bucket 12.
[0018]
When the carton Co containing the accumulated product G is intermittently transported together with the bucket 12, a pair of dust flaps F of the carton Co is first folded as shown in FIG. Thereafter, the lid L of the carton Co is raised and the tack T at the tip of the lid is folded. The tack T is inserted into the carton Co to obtain a closed carton Cc. At this point, the packing of the integrated product G is completed.
[0019]
The carton Cc is thereafter discharged from the bucket 12 of the bucket conveyor 8 to the discharge conveyor 24 by a pusher (not shown), and the discharge conveyor 24 conveys the carton Cc toward the next process.
The carton Co described above is obtained by opening the folding carton Cf, and the folding carton Cf is stored in the carton hopper 26. Here, the folding carton is a so-called one-touch carton, and this kind of one-touch carton is opened by pulling a double blank in a folded state on both sides, and at the same time, the bottom of the carton is opened. A wall is formed.
[0020]
Between the hopper exit of the carton hopper 26 and the bucket conveyor 8 described above, the above-described folding carton Cf box opening device 37 is provided.
The box opening device 37 includes an extraction head 38, which is disposed in front of the hopper outlet in the carton hopper 26 and supported by a rodless cylinder 40. The rodless cylinder 40 extends in a direction intersecting the axis of the carton hopper 26, and the extraction head 38 can be reciprocated laterally of the carton hopper 26, that is, laterally.
[0021]
Further, as shown in FIG. 4, the rodless cylinder 40 is inclined at a predetermined angle with respect to the horizontal plane, and as the extraction head 38 moves laterally from the carton hopper 26, The height position is lowered. The rodless cylinder 40 is supported on the frame 42 of the box opening device 37 via a bracket.
[0022]
As is clear from FIG. 4, the carton hopper 26 is also inclined at the same angle as the rodless cylinder 40, so that the folded carton Cf can be stably accumulated and held in the carton hopper 26. ing.
5 to 7 show details of the extraction head 38.
As shown in FIG. 5, the extraction head 38 includes a plate-like head frame 44, and the head frame 44 is supported by the rodless cylinder 40 via an advance / retreat cylinder 46. The advance / retreat cylinder 46 can move the head frame 44 toward and away from the carton hopper 26, that is, advance / retreat.
[0023]
A pair of brackets 48 project from the head frame 44 toward the carton hopper 26, and the tips of the brackets 48 are connected to each other via pins 51. Between the brackets 48, a block 50 rotatably provided on the pin 51 is provided.
A rotating post 52 extends upward from the block 50, and a piston rod of the tilt cylinder 68 is connected to the upper end of the rotating post 52. The tilting cylinder 68 is disposed at the upper end portion 66 of the head frame 44, and the upper end portion 66 is folded back toward the advance / retreat cylinder 46 as shown in FIG. Accordingly, when the piston rod of the tilt cylinder 68 is expanded and contracted, the rotation post 52 can rotate, that is, tilt, around the pin 51 at the lower end.
[0024]
As shown in FIGS. 6 and 7, a bearing block 54 is attached to the rotation post 52, and the bearing block 54 can move up and down along the rotation post 52. The bearing block 54 can be moved up and down by loosening the lock lever 56 shown in FIGS. 5 and 6, and the height level position of the bearing block 54 can be arbitrarily determined by tightening the lock lever 56. it can.
[0025]
A holder support shaft 58 penetrates the bearing block 54 horizontally, and pad holders 60 are attached to both ends of the holder horizontal shaft 58, respectively. Each pad holder 60 has a U-shape opened toward the carton hopper 26 and holds a pair of upper and lower extraction pads 62. The extraction pad 62 of each pad holder 60 is disposed above and below the holder support shaft 58 and is composed of a suction pad. Each extraction pad 62 is connected to a suction source via a suction hose and can be supplied with a desired suction pressure.
[0026]
A cover plate 64 is attached to the tip of each pad holder 60, and each extraction pad 62 protrudes from the corresponding cover plate 64.
Further, when viewed in FIG. 3, a receiving head 70 is disposed below the carton hopper 26, and the receiving head 70 is attached to a rodless cylinder 72 and can be moved up and down along the rodless cylinder 72. Here, as shown in FIG. 4, the receiving head 70 is located on the side of the carton hopper 26, and the rodless cylinder 72 extends in a direction perpendicular to the rodless cylinder 40 on the extraction head 38 side. ing. Accordingly, the receiving head 70 moves up and down in a direction perpendicular to the lateral reciprocation of the extraction head 38.
[0027]
8 and 9 show details of the receiving head 70. FIG.
The receiving head 70 includes a head frame 74, and the head frame 74 is connected to an element 76 that is reciprocated by a rodless cylinder 72, that is, a plate-like elevator 76. More specifically, the elevator 76 is moved up and down by a rodless cylinder 72, and the head frame 74 is attached to the elevator 76 so that its attachment position can be adjusted up and down.
[0028]
Specifically, as shown in FIG. 9, the elevator 76 is formed with two guide slots 78, while the head frame 74 is provided with guide pins 80 that slidably penetrate the guide slots 78. A lock lever 82 is provided at the tip of each guide pin 80. When the lock lever 82 is loosened, the head frame 74 can move up and down along the guide slot 78, and the tightening of the rod lever 82 determines the height level position of the head frame 74 relative to the elevator 76.
[0029]
A receiving pad 84 is provided below the head frame 74, and the receiving pad 84 faces the extraction head 38 side. The receiving pad 84 also comprises a suction pad, and the suction hose 86 extends through the head frame 74 and the elevator 76 and is connected to a suction source. Here, as shown in FIG. 9, the suction hose 86 passes through a slot 88 formed in the elevator 76, thereby allowing the head frame 74 described above to move up and down.
[0030]
On the other hand, a box opening arm 90 is arranged on the head frame 74, and the box opening arm 90 has a U-shaped cross section and is positioned above the receiving pad 84. In the state shown in FIG. 8, the box opening arm 90 is in a vertical posture, and the lower end portion thereof is attached to the rotating shaft 94 via the bracket 92. The rotating shaft 94 is rotatably supported by the head frame 74.
[0031]
Further, a rotating cylinder 96 is disposed downward on the head frame 74, and a piston rod of the rotating cylinder 96 is connected to a rotating shaft 94 of the box opening arm 90 via a link 98. When the piston rod of the rotating cylinder 96 is contracted from the state shown in the figure, the box opening arm 90 is rotated downward from the vertical posture via the link 98 and is positioned in the horizontal posture.
[0032]
Further, a support plate 100 protrudes from the lower end of the elevator 76 toward the extraction head 38, and the tip of the support plate 100 is formed as a hook portion 102. The hook portion 102 is disposed below the tip of the receiving pad 84.
Next, the operation of the above-described box opening device 37 will be described with reference to FIGS.
[0033]
First, FIG. 10 shows an initial state of the box opening device 37. At this time, the extraction head 38 is in a standby position facing the cutout portion 32 of the carton hopper 26. When in this standby position, the advance / retreat cylinder 46 and the tilt cylinder 68 of the extraction head 38 are in a contracted state, and the extraction pads 62 on the left, right, top, and bottom of the extraction head 38 are in a plane parallel to the hopper exit of the extraction portion 32, That is, they are arranged in a plane inclined with respect to the vertical plane.
[0034]
At this time, the receiving head 70 sucks and holds the folding carton Cf at the receiving pad 84, and descends from the upper delivery position toward the lower box receiving position, and the box opening arm 90 is horizontally moved from the vertical posture. It is in the process of rotating toward the posture. However, in FIG. 10, the receiving head 70 has already reached the box receiving position, the carton Co in the opened state is supplied to the bucket 12 of the bucket conveyor 8 in the box receiving position, and the box opening arm 90 Is shown in a state in which the carton Co is pressed from above and sandwiched between the bucket 12 and the carton Co. Here, as will be apparent from the following description, the carton Co is the one in which the folding carton Cf is opened in the previous box opening cycle.
[0035]
10 (a) and 10 (b) show a schematic front view and a schematic side view of the box opening device 37, respectively, and the receiving head 70 is shown in a vertical posture in order to simplify the drawing. .
When the advance / retreat cylinder 46 of the extraction head 38 is extended from the initial state shown in FIG. 10, the extraction head 38 moves forward from the standby position toward the suction position, and the suction pressure is supplied to the extraction pad 62. Then, as shown in FIG. 11, when the extraction pad 62 comes into close contact with the leading folding carton Cf in the carton hopper 26, each extraction pad 62 adsorbs the lower part of one side of the folding carton Cf. More specifically, the extraction pad 62 adsorbs the vicinity of the folding line on the lower edge side of the folding carton Cf.
[0036]
When the extraction head 38 is positioned at the suction position, the receiving head 70 is lowered to the box opening receiving position, and the box opening arm 90 is rotated to a horizontal posture.
Thereafter, when the extraction head 38 is retracted from the suction position to the standby position under the contraction of the advance / retreat cylinder 46, the extraction pad 62 is moved from the hopper exit of the cutout portion 32 to a single folded carton Cf as shown in FIG. Pull out.
[0037]
At this time, simultaneously with the retraction of the extraction head 38, supply of the suction pressure to the receiving pad 84 in the receiving head 70 is stopped, and the receiving pad 84 releases the adsorption of the carton Co. Then, the carton Co in the open box receiving position is intermittently transported to the next transport position together with the bucket 12 by receiving the drive of the bucket conveyor 8 described above (see FIG. 11). Positioned at the open box receiving position.
[0038]
When the extraction head 38 returns to the standby position, the receiving head 70 starts to rise from the box receiving position to the delivery position, and at the same time, the box opening arm 90 also moves upward from the horizontal posture to the vertical posture. It starts to rotate (see FIG. 12).
Further, when the extraction head 38 returns to the standby position, the rodless cylinder 40 is driven, and the extraction head 38, together with the folding carton Cf sucked and held by the extraction pad 62, is a side delivery preparation position from the standby position. Move to. When the extraction head 38 is positioned at the delivery preparation position, the rotation post 52 is rotated by the extension of the tilting cylinder 68 in the extraction head 38. Such rotation of the rotation post 52 raises the extraction head 38 in an inclined state toward the front, and positions it in the standing posture. Accordingly, as shown in FIG. 13, the folding carton Cf sucked and held by the extraction pad 62 changes from an inclined posture to a vertical posture.
[0039]
Thereafter, when the receiving head 70 rises to the delivery position, the receiving head 70 faces the extraction head 38 at the delivery position preparation position with the folding carton Cf in between, as is apparent from FIG.
When the receiving head 70 is positioned at the delivery position, the advance / retreat cylinder 46 of the extraction head 38 is extended again, and the extraction head 38 advances from the delivery preparation position to the delivery position. By this advance, the folding carton Cf sucked and held by the extraction pad 62 as shown in FIG. 14 (a) is pressed against the receiving pad 84 and the opening arm 90 of the receiving head 70, and the lower edge is received by the receiving edge. The head 70 is received by the hook portion 102 of the support plate 100.
[0040]
When the advancement of the extraction head 38 is completed, a suction pressure is supplied to the receiving pad 84 of the receiving head 70, and the receiving pad 84 sucks the other surface of the folding carton Cf. Here, the suction position of the receiving pad 84 is below the folding line between the lower edge and the upper edge of the folding carton Cf, and the lower end of the box opening arm 90 is positioned immediately above the folding line. Yes.
[0041]
When the suction of the folding carton Cf by the receiving pad 84 is completed, the tilting cylinder 68 is contracted, and the extraction head 38 returns to the original tilted position from the standing position as shown in FIG. By such a returning operation, the folding carton Cf is pulled from both sides by the receiving pad 84 and the extraction pad 62, and the folding carton Cf is provided with an opening hook. That is, in the folding carton Cf, the double blanks are separated from each other, and the folding at each folding line is returned. At this time, since the lower edge of the folding carton Cf is received by the hook portion 102 of the support arm 100 in the receiving head 70, the folding carton Cf is surely attached with an opening hook.
[0042]
On the other hand, simultaneously with the returning operation of the extraction head 38, the advance / retreat cylinder 46 is also contracted, and this contraction is received, the extraction head 38 is retracted from the delivery position to the delivery preparation position, and the opening wrinkle of the folding carton Cf is increased. Further, the suction of the extraction pad 62 to the folding carton Cf is released in the process in which the extraction head 38 retracts toward the delivery preparation position, and as a result, the folding carton with an open ridge as shown in FIG. Cf is sucked and held only by the receiving pad 84 of the receiving head 70.
[0043]
Further, when the extraction head 38 moves back to the delivery preparation position, the rodless cylinder 40 moves backward, and the extraction head 38 returns toward the standby position as shown in FIG. 16B.
On the other hand, simultaneously with the backward movement of the extraction head 38, as shown in FIG. 17, the receiving head 70 begins to descend from the delivery position toward the open box receiving position together with the folding carton Cf with an opening hook. The box opening arm 90 rotates from the vertical posture toward the horizontal posture. In FIGS. 15A and 16A, the box opening arm 90 is rotated from the vertical posture to the horizontal posture before the receiving head 70 is lowered from the delivery position.
[0044]
Here, when the box opening arm 90 is rotated from the vertical posture to the horizontal posture in the lowering process of the receiving head 70, the box opening arm 90 is moved to the receiving pad 84 with respect to the folding carton Cf with the opening hook. The portion between the folding line above the upper suction position and the upper edge is pressed downward. At this time, since the lower edge of the folding carton Cf is supported by the hook portion 102 of the support plate 100, the box opening arm 90 can reliably open the folding carton Cf.
[0045]
As described above, when the folding carton Cf is opened, the extraction head 38 has already moved backward from the delivery preparation position to the standby position, so that the folding carton Cf does not interfere with the extraction head 38.
Thereafter, when the receiving head 70 is lowered to the open box receiving position, the carton Co in the open state is inserted from above into the empty bucket 12 of the bucket conveyor 8 at the open box receiving position as shown in FIG. When the carton Co is completely inserted, the carton Co is sandwiched between the bottom wall of the bucket 12 and the box opening arm 90, so that the box opening is complete.
[0046]
When the receiving head 70 is in the descending process, the extraction head 38 that has returned to the standby position receives the extension of the advancing / retreating cylinder 46 and advances to the suction position, whereby the above-described folding carton Cf is extracted and thereafter. The operation is repeated.
Further, as described above, since the elevation direction of the receiving head 70 is inclined with respect to the vertical direction, the conveying surface of the bucket 12 in the bucket conveyor 8 is also inclined in accordance with the elevation of the receiving head 70. Of course (see FIG. 4).
[0047]
FIG. 19 shows a timing chart of each part described above, and the operation timing of each part can be clearly understood with reference to this timing chart.
According to the box opening device 37 described above, since the transfer of the folding cartons Cf and the carton Co from the carton hopper 26 to the bucket 12 is all realized by linear movement, such linear movement is performed in the folding cartons Cf and Carton Co. It does not give deformation such as bending or warping. Therefore, the folding carton Cf is reliably opened.
[0048]
Further, since the advancing / retreating direction of the extraction head 38 with respect to the carton hopper 26 and the elevating direction of the receiving head 70 do not intersect each other, the advancing / retreating operation of the extracting head 38 and the elevating operation of the receiving head 70 can be performed in parallel. The supply speed of the carton Co from 26 to the bucket conveyor 8 can be increased.
Further, as shown in FIG. 20, the height between the delivery position and the bucket conveyor 8, that is, the lift stroke S of the elevator 76 in the rodless cylinder 72 is uniquely determined regardless of the size of the folding carton Cf. However, since the mounting position of the receiving head 70 with respect to the elevator 76 can be adjusted up and down, it is possible to easily cope with the size change of the folding carton Cf.
[0049]
For example, even if the size of the folding carton Cf increases as shown by a two-dot chain line in FIG. 20, if the attachment position of the receiving head 70 with respect to the elevator 76 is raised as shown by a two-dot chain line, The box opening arm 90 and the receiving pad 84 can be positioned so that the target folding line in the folding carton Cf is sandwiched vertically, and even a large folding carton Cf can be reliably opened in the same manner. it can.
[0050]
As a result, it is possible to obtain a compact box opening device 37 that can surely open the folding carton Cf of various sizes without increasing the size of the box opening device 37. In FIG. 20, reference symbol FL indicates a folding line of the folding carton Cf.
Further, even on the side of the extraction head 38, since the extraction pad 62 can be adjusted up and down, an appropriate position of the folding carton Cf can be adsorbed according to the size of the folding carton Cf, and its stable opening box Greatly contributes.
[0051]
Furthermore, since the rodless cylinder 40 that moves the extraction head 38 in the lateral direction is inclined downward toward the delivery preparation position, that is, the delivery position, the distance between the delivery position and the bucket conveyor 8, that is, The above-described lifting stroke S of the rodless cylinder 72 is shortened, which greatly contributes to increasing the speed of the box opening device 37.
[0052]
The present invention is not limited to the above-described embodiment, and various modifications can be made.
For example, since the carton hopper 26 is inclined, the operation directions of the extraction head and the receiving head are also inclined according to the inclination of the carton hopper 26. However, the carton hopper 26 is not necessarily inclined.
[0053]
Also, the number of extraction pads and receiving pads can be arbitrarily changed.
Furthermore, although the bucket conveyor is used in the embodiment, the present invention is not limited to this, and it is also possible to move the bucket to a pusher robot hand or the like after supplying the opened carton to the receiving bucket.
[0054]
【The invention's effect】
As described above, according to the folding carton opening device of the present invention (Claim 1), the transfer path of the folding carton from the carton hopper to the receiving bucket is constituted by only a straight path, and folding is performed in the transfer process. Since the carton is opened, an external force that causes deformation such as warping or bending does not act on the folding carton, and the folding carton can be opened reliably.
[0055]
Since the folding carton extracted from the carton hopper by the extraction head is moved laterally toward the delivery position defined on the side of the carton hopper (Claim 2), the extraction direction of the folding carton by the extraction head and the receiving head The descending directions of do not cross each other. Therefore, the opening operation of the receiving head and the extraction operation of the extraction head can be performed in parallel, which contributes to the speedup of the box opening device.
[0056]
Since the mounting position of the receiving head with respect to the lifting cylinder can be adjusted up and down (Claim 3), the size of the folding carton can be easily dealt with by increasing the size of the box opening device, and a compact box opening A device is obtained.
Furthermore, since the extraction pad can also be adjusted up and down with respect to the extraction head (Claim 4), the extraction pad can adsorb the appropriate position of the folding carton regardless of the size of the folding carton. Reliable opening of the box is possible.
[Brief description of the drawings]
FIG. 1 is a perspective view schematically showing a boxing operation of an integrated product in a carton filling machine.
FIG. 2 is a schematic view showing a bucket conveyor and one bucket of the carton filling machine of FIG. 1;
FIG. 3 is a view showing a folding carton opening device.
4 is an arrow view from the direction IV in FIG. 3;
FIG. 5 is an enlarged view of the extraction head of FIG. 3;
6 is an arrow view from the VI direction shown in FIG.
7 is a front view of the extraction pad of FIG. 3. FIG.
FIG. 8 is a partially cutaway view of the receiving head of FIG.
FIG. 9 is a rear view of the receiving head of FIG.
FIG. 10 is a diagram showing an initial state of the box opening device.
11 is a view showing a state in which the folded carton of the carton hopper is adsorbed from the state of FIG.
12 is a view showing a state in which a folding carton is extracted from the state of FIG.
13 is a view showing a state in which the folding carton has moved from the state shown in FIG. 12 to a delivery preparation position.
14 is a view showing a state in which the folding carton has been moved to the delivery position from the state of FIG.
15 is a diagram showing a state in which the folding carton has been opened from the state shown in FIG.
16 is a view showing a state in which the folding carton with an open ridge is left on the receiving head from the state of FIG.
17 is a view showing a state in which the receiving head is lowered together with the folding carton from the state shown in FIG. 16;
FIG. 18 is a diagram showing a state in which a carton that has been opened is inserted into a packet.
FIG. 19 is a timing chart showing the operation of each part of the box opening device.
FIG. 20 is a diagram for explaining the position adjustment of the delivery head accompanying the size change of the folding carton.
[Explanation of symbols]
8 Bucket conveyor
26 Carton Hopper
38 Extraction head
40 Rodless cylinder
52 Rotating post (pad adjustment means)
54 Bearing block (pad adjustment means)
62 Extraction pad
70 receiving head
72 Rodless cylinder (lifting cylinder)
78 Guide slot (head adjustment means)
82 Lock lever (head adjustment means)
84 Receiving pad

Claims (4)

A carton hopper for storing folding cartons in a line in a horizontal direction; and a receiving bucket that is disposed below the carton hopper and that can receive an open carton that is opened from the folding carton, from the carton hopper to the receiving bucket In the device for opening the folding carton in the process of transferring the folding carton,
A folding pad that linearly advances and retreats with respect to the outlet of the carton hopper, sucks and pulls out one folding carton from the outlet, and the folding carton that is pulled out together with the pulling pad is located above the receiving bucket. An extraction head to be held in a specified delivery position;
Linearly lifts and lowers between the delivery position and the receiving bucket, adsorbs the folding carton on the opposite side of the extraction pad at the delivery position, and cooperates with the extraction pad on both sides of the folding carton. A receiving pad for opening the folding carton by pulling on the folding carton, and after that, the folding carton is released from the delivery position toward the receiving bucket in a state where the suction of the folding carton by the extraction pad is released, and is applied to the receiving pad. A receiving head for inserting the folded and folded carton into the receiving bucket;
When the receiving head descends from the delivery position toward the receiving bucket, it rotates from a vertical position to a horizontal position, and presses the folding carton with the opening ridge from above. An apparatus for opening a folding carton comprising an opening arm for opening a box. Lateral movement means for linearly reciprocating the extraction head to the side of the carton hopper with respect to the advancing and retreating direction of the extraction head;
2. The folding carton opening box according to claim 1, wherein after the folding carton is pulled out, the lateral moving means moves the pulling head to the vicinity of the delivery position defined on a side of the carton hopper. 3. apparatus. The folding carton box opening device according to claim 1 or 2, further comprising a head adjusting means for adjusting the mounting position of the receiving head with respect to the lifting cylinder up and down. 4. The folding carton opening device according to claim 3, wherein the extraction head further includes pad adjusting means for adjusting the suction position of the extraction pad with respect to the folding carton up and down.

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