EP2592007A1 - Unpacking device and method - Google Patents
Unpacking device and method Download PDFInfo
- Publication number
- EP2592007A1 EP2592007A1 EP20120186800 EP12186800A EP2592007A1 EP 2592007 A1 EP2592007 A1 EP 2592007A1 EP 20120186800 EP20120186800 EP 20120186800 EP 12186800 A EP12186800 A EP 12186800A EP 2592007 A1 EP2592007 A1 EP 2592007A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- robot
- primary
- package
- packing material
- control unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 17
- 238000012856 packing Methods 0.000 claims abstract description 124
- 239000000463 material Substances 0.000 claims abstract description 108
- 238000005520 cutting process Methods 0.000 claims description 34
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 230000009977 dual effect Effects 0.000 description 52
- 238000010586 diagram Methods 0.000 description 8
- 238000003860 storage Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000010899 old newspaper Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 235000011888 snacks Nutrition 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B69/00—Unpacking of articles or materials, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B69/00—Unpacking of articles or materials, not otherwise provided for
- B65B69/0033—Unpacking of articles or materials, not otherwise provided for by cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B69/00—Unpacking of articles or materials, not otherwise provided for
- B65B69/0008—Opening and emptying bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B2220/00—Specific aspects of the packaging operation
- B65B2220/16—Packaging contents into primary and secondary packaging
- B65B2220/18—Packaging contents into primary and secondary packaging the primary packaging being bags the subsequent secondary packaging being rigid containers, e.g. cardboard box
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
- B65B61/005—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for removing material by cutting
Definitions
- the present invention relates to an unpacking device and unpacking method for unpacking a package and taking out contents, and an article unpacked by the unpacking device and unpacking method; and, more particularly, to a technology for restraining scraps of a packing material from being mixed in contents when a package is unpacked.
- a material put into a production line is usually received in a packed state.
- a packed material is manually unpacked by a worker and is put into a production line. Most of unpacking works are repeatedly performed and are automated in many cases.
- Unpacking devices for taking out contents by cutting a packing material with an edged tool are disclosed in Japanese Patent Application Publication Nos. 2002-002638 and 2002-249116 .
- contents old newspapers
- the unpacking device of JP2002-249116A contents (old newspapers) are cut simultaneously with cutting a packing material.
- the unpacking device of JP2002-249116A the upper wall of a box is cut out with a slanting cutter.
- the contents are relatively small ones such as vegetable or flour, it is sometimes the case that a part of the contents remains within the packing material in an unpacking process. For that reason, it is demanded to keep, as far as possible, the contents from remaining within the packing material in an unpacking process.
- an unpacking device including: a robot; and a control unit configured to control the robot such that the robot takes out a primary package through an incision of a secondary packing material of a secondary package and then takes out content from the primary package.
- the primary package is formed by packing the content with a primary packing material
- the secondary package is formed by packing the primary package with the secondary packing material.
- the control unit may control the robot to take out the primary package through the incision of the secondary packing material by own weight of the primary package.
- the primary packing material may be a flexible bag
- the control unit may be configured to control the robot such that the robot grips the primary packing material of the primary package, lifts up the primary packing material and takes out the content from the bag by own weight of the contents.
- the control unit may be configured to control the robot such that, prior to taking out the content, the robot performs a preparatory grip operation of gripping a specified portion of the primary packing material of the primary package, lifting up the primary package by a specified displacement amount and releasing the primary package and a main grip operation of gripping the specified portion or the vicinity of the specified portion.
- the control unit may be configured to control the robot such that the robot performs an up-down operation between the preparatory grip operation and the main grip operation and, in the up-down operation, the robot is moved upward or downward in a state that the robot has released the primary package in the preparatory grip operation so that the position where the robot grips the primary package in the main grip operation is shifted.
- the primary packing material may be a flexible bag
- the content may be sealed within the primary packing material of the primary package
- the control unit may be configured to control the robot such that the robot grips the primary packing material of the primary package, forms an incision in the primary packing material and takes out the contents through the incision using the own weight of the contents.
- the control unit may be configured to control the robot such that, prior to forming the incision in the primary packing material, the robot performs a preparatory grip operation of gripping a specified portion of the primary packing material of the primary package, lifting up the primary package by a specified displacement amount and releasing the primary package and a main grip operation of gripping the specified portion or the vicinity of the specified portion.
- the control unit may be configured to control the robot such that the robot performs an up-down operation between the preparatory grip operation and the main grip operation and, in the up-down operation, the robot is moved upward or downward in a state that the robot has released the primary package in the preparatory grip operation so that the position where the robot grips the primary package in the main grip operation is shifted.
- the control unit may be configured to control the robot such that the robot ceases to operate for a specified time while gripping the specified portion of the primary packing material in the preparatory grip operation.
- the unpacking device may further include: a packing material cutting unit for forming the incision in the secondary packing material by cutting the secondary packing material of the secondary package in a location other than a location where the primary package is taken out by the robot and other than a location where the content is taken out by the robot; a conveying unit for conveying the secondary package from the packing material cutting unit to an operation region of the robot; and a scrap removal unit for removing scraps generated during the cutting operation from the secondary package in a location between the packing material cutting unit and the operation region of the robot, other than the location where the primary package is taken out by the robot and other than the location where the content is taken out by the robot.
- an unpacking method for unpacking a package and taking out contents including a primary package formed by packing the contents with a primary packing material and a secondary package formed by packing the primary package with a secondary packing material.
- the unpacking method includes: forming an incision in the secondary packing material of the secondary package; and taking out the primary package through the incision of the secondary packing material and then taking out the contents from the primary package through the use of a robot.
- an unpacking device for taking out a plastic bag from a package formed of an incised cardboard box, lifting up the plastic bag and taking out contents from the plastic bag through the use of an articulated robot.
- Figs. 1 and 2 are a view schematically showing a packing process of a foodstuff.
- a foodstuff 1 as contents (see the left view in Fig. 1 ) is contained in a plastic bag 2 as a primary packing material (see the central view in Fig. 1 ).
- a taking-out mouth (bag opening) 6 is folded to form a primary package 3 (see the right view in Fig. 1 ).
- the primary package 3 is packed into a cardboard box 4 as a secondary packing material (see the left view in Fig. 2 ), thereby forming a secondary package 5 (see the right view in Fig. 2 ).
- the primary packing material is a flexible bag like the plastic bag 2 and has the taking-out mouth 6.
- the secondary packing material is a container like the cardboard box 4, the shape of which is kept unchanged unless a certain level of external force is applied thereto.
- an incision enough to take out the primary package 3 therethrough can be formed in the secondary package 5 by cutting the secondary packing material itself or the packing tape 7 adhering to the secondary packing material through the use of an edged tool.
- Fig. 3 is a plan view showing a process layout according to the present embodiment. Referring to Fig. 3 , there are shown a dual arm robot 10, a package conveying unit 11, a packing material cutting unit 12, a scrap removal unit 13, a content unloading conveyor 14, a cardboard unloading conveyor 15, a cardboard storage device 16, a plastic bag recovery device 17 and a plastic bag storage box 18.
- the dual arm robot 10 is an articulated robot having fifteen axes in total and is provided with two seven-axes articulated robots which are mounted to a common shaft rotating in a substantially horizontal direction. Then, geometric terms such as "horizontal” in the present disclosure do not require the strict mathematical sense. It is intended to allow an error during implementation.
- the package conveying unit 11 conveys the secondary package 5 at least from the packing material cutting unit 12 to the operation region of the dual arm robot 10.
- the package conveying unit 11 includes a package loading conveyor 19 and a cross feed device 20.
- the package loading conveyor 19 conveys the secondary package 5 from an upstream-side unloading station to the start point of the cross feed device 20 (see an arrow A in Fig. 3 ).
- the packing material cutting unit 12 is a cutting device installed in a conveying route along which the secondary package 5 is conveyed by the package loading conveyor 19.
- the packing material cutting unit 12 forms an incision in the cardboard box 4 of the secondary package 5 using an edged tool or the like.
- the packing material cutting unit 12 forms an incision in the portion of the cardboard box 4 other than the lower surface thereof.
- the packing material may be cut by the packing material cutting unit 12 in any location other than the location where the primary package 3 is taken out by the dual arm robot 10 and the location where the foodstuff 1 is taken out by the dual arm robot 10.
- an incision may be formed on the lower surface of the cardboard box 4 by the packing material cutting unit 12, and then the secondary package 5 may be rotated so that the incision can lie at the lateral side or the upper side.
- the scrap removal unit 13 is a cleaning device installed between the packing material cutting unit 12 and the cross feed device 20.
- the scrap removal unit 13 removes the scraps generated in the packing material cutting process from the secondary package 5 by blowing the scraps away with a compressed air or by sucking the scraps.
- the scraps are removed by the scrap removal unit 13 in a location between the packing material cutting unit 12 and the operation region of the dual arm robot 10.
- the scraps may be removed by the scrap removal unit 13 in any location other than the location where the primary package 3 is taken out by the dual arm robot 10 and the location where the foodstuff 1 is taken out by the dual arm robot 10.
- the cross feed device 20 conveys the secondary package 5 by parallel-moving the secondary package 5 from the end point of the package loading conveyor 19 to the start point of the content unloading conveyor 14 (see an arrow B in Fig. 3 ).
- Fig. 4 is a block diagram schematically showing an unpacking device 100 according to the present embodiment.
- the unpacking device 100 includes the dual arm robot 10, a primary taking-out control unit 110 and a secondary taking-out control unit 120.
- the primary taking-out control unit 110 and the secondary taking-out control unit 120 serve as a control unit.
- the primary taking-out control unit 110 and the secondary taking-out control unit 120 control the dual arm robot 10 to unpack a package and take out contents.
- Fig. 5 is a view for explaining the function of the primary taking-out control unit 110.
- the primary taking-out control unit 110 controls the dual arm robot 10 to take out the primary package 3 through the incision 8 formed by the packing material cutting unit 12. More specifically, the primary taking-out control unit 110 first controls the dual arm robot 10 to hold the cardboard box 4 of the secondary package 5 at the start point of the content unloading conveyor 14 and can lift up the secondary package 5 (see the upper view in Fig. 5 ).
- the primary taking-out control unit 110 controls the dual arm robot 10 to rotate the secondary package 5 to have the incision 8 face downward so that the primary package 3 can be taken out through the incision 8 onto the content unloading conveyor 14 under the own weight of the primary package 3 (see the lower view in Fig. 5 ).
- the primary taking-out control unit 110 controls the dual arm robot 10 to rotate the secondary package 5 by 180 degrees.
- the primary taking-out control unit 110 controls the dual arm robot 10 to rotate (see an arrow C in Fig. 3 ) while holding the cardboard box 4 and carry the cardboard box 4 onto the cardboard unloading conveyor 15.
- the cardboard unloading conveyor 15 conveys the cardboard box 4 to the cardboard storage device 16 (see an arrow D in Fig. 3 ).
- the cardboard storage device 16 stores the cardboard box 4 conveyed by the cardboard unloading conveyor 15.
- Fig. 6 is a view for explaining the function of the secondary taking-out control unit 120.
- the secondary taking-out control unit 120 controls the dual arm robot 10 to come back to the content unloading conveyor 14 and take out the foodstuff 1 from the primary package 3. More specifically, the secondary taking-out control unit 120 controls the dual arm robot 10 to grip the plastic bag 2 of the primary package 3 (see the left view in Fig. 6 ) and lift up the plastic bag 2 so that the foodstuff 1 can be taken out through the taking-out mouth 6 onto the content unloading conveyor 14 under the own weight of the foodstuff 1 (see the right view in Fig. 6 ).
- the secondary taking-out control unit 120 confirms the gripping position through the use of a sensor (not shown). After the foodstuff 1 is taken out onto the content unloading conveyor 14, the secondary taking-out control unit 120 controls the dual arm robot 10 to rotate (see an arrow C in Fig. 3 ) while gripping the plastic bag 2 and carry the plastic bag 2 onto the plastic bag recovery device 17.
- the dual arm robot 10 When lifting up the plastic bag 2, the dual arm robot 10 may operate at a relatively low speed until the foodstuff 1 comes out from the plastic bag 2, so that the plastic bag 2 should not be torn by an operation impact. After the foodstuff 1 comes out from the plastic bag 2, the dual arm robot 10 may operate at a relatively high speed.
- the secondary taking-out control unit 120 can use the sensitivity of a servo motor of the dual arm robot 10 to detect whether the foodstuff 1 has come out from the plastic bag 2.
- the secondary taking-out control unit 120 may control the dual arm robot 10 to operate by a specified distance at a relatively low speed, and then the secondary taking-out control unit 120 may control the dual arm robot 10 to operate at a relatively high speed.
- the specified distance be substantially equal to the length of the plastic bag 2.
- the plastic bag recovery device 17 sends the plastic bag 2 to the plastic bag storage box 18 (see an arrow E in Fig. 3 ).
- the plastic bag storage box 18 stores the plastic bag 2 sent from the plastic bag recovery device 17.
- the content unloading conveyor 14 conveys the foodstuff 1 to the next station (see an arrow F in Fig. 3 ).
- the secondary packing material (the cardboard box 4) and the primary packing material (the plastic bag 2) are simultaneously cut with an edged tool. In that case, however, it is highly likely that the scraps of the secondary packing material (the cardboard box 4) and the primary packing material (the plastic bag 2) are mixed in the contents.
- the primary package 3 is first taken out from the secondary package 5 and then the contents (the foodstuff 1) are taken out without having to form an incision in the primary packing material (the plastic bag 2).
- the location where the incision is formed in the secondary packing material (the cardboard box 4) differs from the location where the primary package 3 is taken out and the location where the contents (the foodstuff 1) are taken out. This makes it particularly difficult for the scraps of the secondary packing material (the cardboard box 4) to be mixed in the contents (the foodstuff 1).
- operation for creating a grip margin means a preparatory grip operation of gripping a specified portion of the plastic bag 2, lifting up the plastic bag 2 and releasing the plastic bag 2.
- Fig. 7 is a block diagram schematically showing an unpacking device 200 according to the first modified example.
- the unpacking device 200 includes the dual arm robot 10, the primary taking-out control unit 110 and a secondary taking-out control unit 220.
- the primary taking-out control unit 110 and the secondary taking-out control unit 220 serve as a control unit.
- the same components as those of the above-described embodiment will be designated by like reference symbols and redundant description thereof will be omitted.
- the secondary taking-out control unit 220 controls the dual arm robot 10 to take out the foodstuff 1 from the primary package 3.
- the secondary taking-out control unit 220 differs from the secondary taking-out control unit 120 in that the secondary taking-out control unit 220 has an operation for creating a grip margin.
- the secondary taking-out control unit 220 includes a preparatory grip operation control unit 221, an up-down operation control unit 222 and a main grip operation control unit 223.
- Fig. 8 is a view for explaining the function of the preparatory grip operation control unit 221.
- the preparatory grip operation control unit 221 controls the dual arm robot 10 to grip a specified portion of the plastic bag 2 of the primary package 3 (see the left view in Fig. 8 ), lift up the primary package 3 by a specified displacement amount (see the central view in Fig. 8 ) and release the primary package 3 (see the right view in Fig. 8 ), prior to taking out the foodstuff 1 from the taking-out mouth 6.
- Fig. 9 is a view for explaining the functions of the up-down operation control unit 222 and the main grip operation control unit 223.
- the up-down operation control unit 222 operates the dual arm robot 10 to move upward or downward in a state that the dual arm robot 10 has released the primary package 3 under the control of the preparatory grip operation control unit 221.
- the up-down operation control unit 222 shifts the position where the dual arm robot 10 grips the primary package 3 in a main grip operation (see the left view in Fig. 9 ).
- the up-down operation control unit 222 operates the dual arm robot 10 to move upward by about 30 cm to 50 cm.
- the main grip operation control unit 223 causes the dual arm robot 10 to grip a specified portion of the primary package 3 or the vicinity of the specified portion (see the right view in Fig. 9 ).
- the distance of upward movement or downward movement of the dual arm robot 10 and the number of the preparatory grip operations may be set by a user.
- a screen for setting the position of the grip margin and the number of the preparatory grip operations may be displayed on a touch panel so as to receive the selection of "high", “middle” and “low” options and the number of the preparatory grip operations inputted by a user. Since the movement distance of the dual arm robot 10 controlled by the up-down operation control unit 222 may be zero, the secondary taking-out control unit 220 may be configured not to include the up-down operation control unit 222.
- the dual arm robot 10 performs the operation of creating the grip margin, whereby the amount of the contents (the foodstuff 1) gripped during the main grip operation can be made smaller than the amount of the contents (the foodstuff 1) gripped during the preparatory grip operation.
- a foodstuff as a raw material is put into a snack food production line.
- the second modified example differs from the above-described embodiment in terms of the foodstuff packing state.
- a foodstuff 1 as contents is contained in the plastic bag 2 as the primary packing material.
- the primary package 3 is formed by folding the taking-out mouth 6.
- a primary package 23 (not shown) is formed by putting a foodstuff 1 as contents into a plastic bag 22 (not shown) as a primary packing material in a sealed state.
- a secondary package 25 (not shown) is formed by packing the primary package 23 with a cardboard box 4 as a secondary packing material.
- the foodstuff packing state is substantially the same as the foodstuff packing state available in the embodiment shown in Figs. 1 and 2 .
- the plastic bag 22 of the second modified example corresponds to the plastic bag 2 of the above-described embodiment.
- the plastic bag 22 of the second modified example differs from the plastic bag 2 of the above-described embodiment in that the mouth of the plastic bag 22 is closed by thermal welding.
- the primary package 23 of the second modified example corresponds to the primary package 3 of the above-described embodiment. While the contents are not sealed in the primary package 3 of the above-described embodiment, the contents are kept sealed in the primary package 23 of the second modified example.
- the secondary package 25 of the second modified example corresponds to the secondary package 5 of the above-described embodiment. While the primary package 23 is packed by the secondary package 25 of the second modified example, the primary package 3 is packed by the secondary package 5 of the above-described embodiment.
- Fig. 10 is a block diagram schematically showing an unpacking device 300 according to the second modified example.
- the unpacking device 300 includes the dual arm robot 10, the primary taking-out control unit 110 and a secondary taking-out control unit 320.
- the primary taking-out control unit 110 and the secondary taking-out control unit 320 serve as a control unit.
- the same components as those of the above-described embodiment will be designated by like reference symbols and redundant description thereof will be omitted.
- the secondary taking-out control unit 320 controls the dual arm robot 10 to can take out the foodstuff 1 from the primary package 23.
- the secondary taking-out control unit 320 differs from the secondary taking-out control unit 120 in that the secondary taking-out control unit 320 controls the dual arm robot 10 to perform an incising operation for making an incision in the plastic bag.
- the secondary taking-out control unit 320 includes an incising operation control unit 324.
- the incising operation control unit 324 controls the dual arm robot 10 to perform an incising operation in which the plastic bag 22 of the primary package 23 is gripped by one robot arm of the dual arm robot 10 and is incised by the other robot arm of the dual arm robot 10.
- the dual arm robot 10 first takes out the primary package 23 from the secondary package 25, then makes an incision in the primary packing material (the plastic bag 2) and then takes out the contents (the foodstuff 1) from the incision. This makes it difficult for the scraps of the primary packing material (the plastic bag 22) and the secondary packing material (the cardboard box 4) to be mixed in the contents (the foodstuff 1).
- the unpacking device 300 is very useful in this situation.
- the primary package 23 is formed by, e.g., putting the contents into the primary packing material (the plastic bag 22) in a sealed state as in the second modified example.
- the secondary package 25 is formed by packing the primary package 23 with a secondary packing material stronger than the cardboard box 4.
- the secondary packing material stronger than the cardboard box 4 refers to a container, e.g., a drum can, which is not readily deformed even if a considerable external force is applied thereto.
- a lid opening device for opening a lid of a container needs to be employed in the process layout of the above-described embodiment.
- operation for creating a cutting margin means a preparatory grip operation of gripping a specified portion of the plastic bag 2, lifting up the plastic bag 2 and releasing the plastic bag 2, just like the grip margin creating operation of the first modified example.
- Fig. 11 is a block diagram schematically showing an unpacking device 400 according to the third modified example.
- the unpacking device 400 includes a dual arm robot 10, a primary taking-out control unit 110 and a secondary taking-out control unit 420.
- the primary taking-out control unit 110 and the secondary taking-out control unit 420 serve as a control unit.
- the same components as those of the above-described embodiment, the first modified example and the second modified example will be designated by like reference symbols and redundant description thereof will be omitted.
- the secondary taking-out control unit 420 controls the dual arm robot 10 so that the dual arm robot 10 can take out the foodstuff 1 from the primary package 23.
- the secondary taking-out control unit 420 differs from the secondary taking-out control unit 320 in that the secondary taking-out control unit 420 has an operation for creating a cutting margin.
- the secondary taking-out control unit 420 includes a preparatory grip operation control unit 221, an operation pause control unit 421, an up-down operation control unit 222, a main grip operation control unit 223 and an incising operation control unit 324.
- the operation pause control unit 421 controls the dual arm robot 10 so that the dual arm robot 10 can cease to operate for a specified time while gripping a specified portion of the plastic bag 22 under the control of the preparatory grip operation control unit 221.
- the specified time is approximately several seconds or several tens of seconds.
- the pause control for pausing the operation of the dual arm robot 10 for the specified time under the control of the operation pause control unit 421 is performed in anticipation of an effect that the contents having a relatively small particle size, such as flour or the like, are dropped downward so as to increase the cutting margin.
- the pause control may be applied to the first modified example. If the particle size of the contents is larger than a specified size, it is difficult to expect the pause control effect. This means that the operation pause control unit 421 is not an essential element.
- the dual arm robot 10 performs the operation for creating the cutting margin. This makes it possible to restrain the contents (the foodstuff 1) from scattering when an incision is formed in the primary packing material (the plastic bag 22).
- the unpacking devices 100, 200, 300 and 400 described above are capable of unpacking a package formed of a previously-incised cardboard box 4. If the package conveying unit 11, the packing material cutting unit 12 and the scrap removal unit 13 are added to the respective unpacking devices, it becomes possible to realize an unpacking device capable of unpacking a package formed of a cardboard box 4 having no incision (which corresponds to the area indicated by a broken line G in Fig. 3 ).
- the present invention can find its application in all kinds of unpacking devices for unpacking a package and taking out contents. With the present invention, it is possible to perform an unpacking operation so that the scraps of a packing material should not be mixed in the contents. Therefore, the present invention is very high in industrial applicability.
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Abstract
Description
- The present invention relates to an unpacking device and unpacking method for unpacking a package and taking out contents, and an article unpacked by the unpacking device and unpacking method; and, more particularly, to a technology for restraining scraps of a packing material from being mixed in contents when a package is unpacked.
- A material put into a production line is usually received in a packed state. A packed material is manually unpacked by a worker and is put into a production line. Most of unpacking works are repeatedly performed and are automated in many cases.
- Unpacking devices for taking out contents by cutting a packing material with an edged tool are disclosed in Japanese Patent Application Publication Nos.
2002-002638 2002-249116 JP2002-002638A JP2002-249116A - When a packing material is cut with the unpacking device, it is highly likely that scraps are mixed in the contents in the course of cutting the packing material. In case where the contents are old newspapers as in the unpacking device of
JP2002-002638A - If the contents are relatively small ones such as vegetable or flour, it is sometimes the case that a part of the contents remains within the packing material in an unpacking process. For that reason, it is demanded to keep, as far as possible, the contents from remaining within the packing material in an unpacking process.
- It is an object of the present invention to provide an unpacking device and unpacking method capable of unpacking a package so that scraps of a packing material are not mixed in the contents, and an article unpacked by the unpacking device and method.
- In accordance with an aspect of the present invention, there is provided an unpacking device including: a robot; and a control unit configured to control the robot such that the robot takes out a primary package through an incision of a secondary packing material of a secondary package and then takes out content from the primary package. The primary package is formed by packing the content with a primary packing material, and the secondary package is formed by packing the primary package with the secondary packing material. In such an unpacking device, the control unit may control the robot to take out the primary package through the incision of the secondary packing material by own weight of the primary package.
- The primary packing material may be a flexible bag, and the control unit may be configured to control the robot such that the robot grips the primary packing material of the primary package, lifts up the primary packing material and takes out the content from the bag by own weight of the contents.
- The control unit may be configured to control the robot such that, prior to taking out the content, the robot performs a preparatory grip operation of gripping a specified portion of the primary packing material of the primary package, lifting up the primary package by a specified displacement amount and releasing the primary package and a main grip operation of gripping the specified portion or the vicinity of the specified portion.
- The control unit may be configured to control the robot such that the robot performs an up-down operation between the preparatory grip operation and the main grip operation and, in the up-down operation, the robot is moved upward or downward in a state that the robot has released the primary package in the preparatory grip operation so that the position where the robot grips the primary package in the main grip operation is shifted.
- The primary packing material may be a flexible bag, the content may be sealed within the primary packing material of the primary package, and the control unit may be configured to control the robot such that the robot grips the primary packing material of the primary package, forms an incision in the primary packing material and takes out the contents through the incision using the own weight of the contents.
- The control unit may be configured to control the robot such that, prior to forming the incision in the primary packing material, the robot performs a preparatory grip operation of gripping a specified portion of the primary packing material of the primary package, lifting up the primary package by a specified displacement amount and releasing the primary package and a main grip operation of gripping the specified portion or the vicinity of the specified portion.
- The control unit may be configured to control the robot such that the robot performs an up-down operation between the preparatory grip operation and the main grip operation and, in the up-down operation, the robot is moved upward or downward in a state that the robot has released the primary package in the preparatory grip operation so that the position where the robot grips the primary package in the main grip operation is shifted.
- The control unit may be configured to control the robot such that the robot ceases to operate for a specified time while gripping the specified portion of the primary packing material in the preparatory grip operation.
- The unpacking device may further include: a packing material cutting unit for forming the incision in the secondary packing material by cutting the secondary packing material of the secondary package in a location other than a location where the primary package is taken out by the robot and other than a location where the content is taken out by the robot; a conveying unit for conveying the secondary package from the packing material cutting unit to an operation region of the robot; and a scrap removal unit for removing scraps generated during the cutting operation from the secondary package in a location between the packing material cutting unit and the operation region of the robot, other than the location where the primary package is taken out by the robot and other than the location where the content is taken out by the robot.
- In accordance with another aspect of the present invention, there is provided an unpacking method for unpacking a package and taking out contents, the package including a primary package formed by packing the contents with a primary packing material and a secondary package formed by packing the primary package with a secondary packing material. The unpacking method includes: forming an incision in the secondary packing material of the secondary package; and taking out the primary package through the incision of the secondary packing material and then taking out the contents from the primary package through the use of a robot.
- The objects and features of the present invention will become apparent from the following description of embodiments, given in conjunction with the accompanying drawings, in which:
-
Fig. 1 andFig. 2 are a view schematically showing a packing process of a foodstuff; -
Fig. 3 is a plan view showing a process layout according to an embodiment of the present invention; -
Fig. 4 is a block diagram schematically showing an unpacking device according to the embodiment; -
Fig. 5 is a view for explaining the function of a primary taking-out control unit; -
Fig. 6 is a view for explaining the function of a secondary taking-out control unit; -
Fig. 7 is a block diagram schematically showing an unpacking device according to a first modified example of the embodiment; -
Fig. 8 is a view for explaining the function of a preparatory grip operation control unit; -
Fig. 9 is a view for explaining the functions of an up-down operation control unit and a main grip operation control unit; -
Fig. 10 is a block diagram schematically showing an unpacking device according to a second modified example of the embodiment; and -
Fig. 11 is a block diagram schematically showing an unpacking device according to a third modified example of the embodiment. - There is provided an unpacking device for taking out a plastic bag from a package formed of an incised cardboard box, lifting up the plastic bag and taking out contents from the plastic bag through the use of an articulated robot.
- In the present embodiment, it is supposed that a foodstuff as a material is put into a snack food production line. A packing state available when a foodstuff is received will be described herein below.
-
Figs. 1 and2 are a view schematically showing a packing process of a foodstuff. As shown inFig. 1 , a foodstuff 1 as contents (see the left view inFig. 1 ) is contained in aplastic bag 2 as a primary packing material (see the central view inFig. 1 ). A taking-out mouth (bag opening) 6 is folded to form a primary package 3 (see the right view inFig. 1 ). As shown inFig. 2 , theprimary package 3 is packed into acardboard box 4 as a secondary packing material (see the left view inFig. 2 ), thereby forming a secondary package 5 (see the right view inFig. 2 ). In this regard, the primary packing material is a flexible bag like theplastic bag 2 and has the taking-out mouth 6. The secondary packing material is a container like thecardboard box 4, the shape of which is kept unchanged unless a certain level of external force is applied thereto. In the present embodiment, an incision enough to take out theprimary package 3 therethrough can be formed in thesecondary package 5 by cutting the secondary packing material itself or the packing tape 7 adhering to the secondary packing material through the use of an edged tool. -
Fig. 3 is a plan view showing a process layout according to the present embodiment. Referring toFig. 3 , there are shown adual arm robot 10, apackage conveying unit 11, a packingmaterial cutting unit 12, ascrap removal unit 13, acontent unloading conveyor 14, acardboard unloading conveyor 15, acardboard storage device 16, a plasticbag recovery device 17 and a plasticbag storage box 18. - The
dual arm robot 10 is an articulated robot having fifteen axes in total and is provided with two seven-axes articulated robots which are mounted to a common shaft rotating in a substantially horizontal direction. Then, geometric terms such as "horizontal" in the present disclosure do not require the strict mathematical sense. It is intended to allow an error during implementation. Thepackage conveying unit 11 conveys thesecondary package 5 at least from the packingmaterial cutting unit 12 to the operation region of thedual arm robot 10. Thepackage conveying unit 11 includes apackage loading conveyor 19 and across feed device 20. - The
package loading conveyor 19 conveys thesecondary package 5 from an upstream-side unloading station to the start point of the cross feed device 20 (see an arrow A inFig. 3 ). - The packing
material cutting unit 12 is a cutting device installed in a conveying route along which thesecondary package 5 is conveyed by thepackage loading conveyor 19. The packingmaterial cutting unit 12 forms an incision in thecardboard box 4 of thesecondary package 5 using an edged tool or the like. In this connection, the packingmaterial cutting unit 12 forms an incision in the portion of thecardboard box 4 other than the lower surface thereof. Preferably, the packing material may be cut by the packingmaterial cutting unit 12 in any location other than the location where theprimary package 3 is taken out by thedual arm robot 10 and the location where the foodstuff 1 is taken out by thedual arm robot 10. Alternatively, an incision may be formed on the lower surface of thecardboard box 4 by the packingmaterial cutting unit 12, and then thesecondary package 5 may be rotated so that the incision can lie at the lateral side or the upper side. - The
scrap removal unit 13 is a cleaning device installed between the packingmaterial cutting unit 12 and thecross feed device 20. Thescrap removal unit 13 removes the scraps generated in the packing material cutting process from thesecondary package 5 by blowing the scraps away with a compressed air or by sucking the scraps. The scraps are removed by thescrap removal unit 13 in a location between the packingmaterial cutting unit 12 and the operation region of thedual arm robot 10. Preferably, the scraps may be removed by thescrap removal unit 13 in any location other than the location where theprimary package 3 is taken out by thedual arm robot 10 and the location where the foodstuff 1 is taken out by thedual arm robot 10. - The
cross feed device 20 conveys thesecondary package 5 by parallel-moving thesecondary package 5 from the end point of thepackage loading conveyor 19 to the start point of the content unloading conveyor 14 (see an arrow B inFig. 3 ). -
Fig. 4 is a block diagram schematically showing anunpacking device 100 according to the present embodiment. As shown inFig. 4 , theunpacking device 100 includes thedual arm robot 10, a primary taking-outcontrol unit 110 and a secondary taking-outcontrol unit 120. In the present embodiment, the primary taking-outcontrol unit 110 and the secondary taking-outcontrol unit 120 serve as a control unit. - The primary taking-out
control unit 110 and the secondary taking-outcontrol unit 120 control thedual arm robot 10 to unpack a package and take out contents. -
Fig. 5 is a view for explaining the function of the primary taking-outcontrol unit 110. As shown inFig. 5 , the primary taking-outcontrol unit 110 controls thedual arm robot 10 to take out theprimary package 3 through the incision 8 formed by the packingmaterial cutting unit 12. More specifically, the primary taking-outcontrol unit 110 first controls thedual arm robot 10 to hold thecardboard box 4 of thesecondary package 5 at the start point of thecontent unloading conveyor 14 and can lift up the secondary package 5 (see the upper view inFig. 5 ). - Next, the primary taking-out
control unit 110 controls thedual arm robot 10 to rotate thesecondary package 5 to have the incision 8 face downward so that theprimary package 3 can be taken out through the incision 8 onto thecontent unloading conveyor 14 under the own weight of the primary package 3 (see the lower view inFig. 5 ). For example, if the incision 8 is formed at the upper side of thecardboard box 4, the primary taking-outcontrol unit 110 controls thedual arm robot 10 to rotate thesecondary package 5 by 180 degrees. Moreover, the primary taking-outcontrol unit 110 controls thedual arm robot 10 to rotate (see an arrow C inFig. 3 ) while holding thecardboard box 4 and carry thecardboard box 4 onto thecardboard unloading conveyor 15. - After the
cardboard box 4 is carried by thedual arm robot 10, thecardboard unloading conveyor 15 conveys thecardboard box 4 to the cardboard storage device 16 (see an arrow D inFig. 3 ). Thecardboard storage device 16 stores thecardboard box 4 conveyed by thecardboard unloading conveyor 15. -
Fig. 6 is a view for explaining the function of the secondary taking-outcontrol unit 120. As shown inFig. 6 , the secondary taking-outcontrol unit 120 controls thedual arm robot 10 to come back to thecontent unloading conveyor 14 and take out the foodstuff 1 from theprimary package 3. More specifically, the secondary taking-outcontrol unit 120 controls thedual arm robot 10 to grip theplastic bag 2 of the primary package 3 (see the left view inFig. 6 ) and lift up theplastic bag 2 so that the foodstuff 1 can be taken out through the taking-out mouth 6 onto thecontent unloading conveyor 14 under the own weight of the foodstuff 1 (see the right view inFig. 6 ). - In this regard, when the
dual arm robot 10 grips theplastic bag 2 of theprimary package 3, the secondary taking-outcontrol unit 120 confirms the gripping position through the use of a sensor (not shown). After the foodstuff 1 is taken out onto thecontent unloading conveyor 14, the secondary taking-outcontrol unit 120 controls thedual arm robot 10 to rotate (see an arrow C inFig. 3 ) while gripping theplastic bag 2 and carry theplastic bag 2 onto the plasticbag recovery device 17. - When lifting up the
plastic bag 2, thedual arm robot 10 may operate at a relatively low speed until the foodstuff 1 comes out from theplastic bag 2, so that theplastic bag 2 should not be torn by an operation impact. After the foodstuff 1 comes out from theplastic bag 2, thedual arm robot 10 may operate at a relatively high speed. In this connection, the secondary taking-outcontrol unit 120 can use the sensitivity of a servo motor of thedual arm robot 10 to detect whether the foodstuff 1 has come out from theplastic bag 2. Instead of detecting whether the foodstuff 1 has come out from theplastic bag 2, the secondary taking-outcontrol unit 120 may control thedual arm robot 10 to operate by a specified distance at a relatively low speed, and then the secondary taking-outcontrol unit 120 may control thedual arm robot 10 to operate at a relatively high speed. In this regard, it is preferred that the specified distance be substantially equal to the length of theplastic bag 2. - The plastic
bag recovery device 17 sends theplastic bag 2 to the plastic bag storage box 18 (see an arrow E inFig. 3 ). The plasticbag storage box 18 stores theplastic bag 2 sent from the plasticbag recovery device 17. After the foodstuff 1 is taken out by thedual arm robot 10, thecontent unloading conveyor 14 conveys the foodstuff 1 to the next station (see an arrow F inFig. 3 ). - In order to take out the contents (the foodstuff 1) from the
secondary package 5 using the conventional unpacking devices disclosed inJP2002-002638A JP2002-249116A - On the other hand, with the
unpacking device 100 and the unpacking method according to the present embodiment, theprimary package 3 is first taken out from thesecondary package 5 and then the contents (the foodstuff 1) are taken out without having to form an incision in the primary packing material (the plastic bag 2). This makes it difficult for the scraps of the primary packing material (plastic bag 2) and the secondary packing material (the cardboard box 4) to be mixed in the contents (foodstuff 1). With theunpacking device 100 according to the present embodiment, the location where the incision is formed in the secondary packing material (the cardboard box 4) differs from the location where theprimary package 3 is taken out and the location where the contents (the foodstuff 1) are taken out. This makes it particularly difficult for the scraps of the secondary packing material (the cardboard box 4) to be mixed in the contents (the foodstuff 1). - In a first modified example of the above-described embodiment, description will be made on in instance where an operation for creating a grip margin is added to the
unpacking device 100 of the above-described embodiment. - In this regard, the term "operation for creating a grip margin" means a preparatory grip operation of gripping a specified portion of the
plastic bag 2, lifting up theplastic bag 2 and releasing theplastic bag 2. -
Fig. 7 is a block diagram schematically showing anunpacking device 200 according to the first modified example. As shown inFig. 7 , theunpacking device 200 includes thedual arm robot 10, the primary taking-outcontrol unit 110 and a secondary taking-outcontrol unit 220. In the first modified example, the primary taking-outcontrol unit 110 and the secondary taking-outcontrol unit 220 serve as a control unit. The same components as those of the above-described embodiment will be designated by like reference symbols and redundant description thereof will be omitted. - Just like the secondary taking-out
control unit 120 of theunpacking device 100 of the above-described embodiment, the secondary taking-outcontrol unit 220 controls thedual arm robot 10 to take out the foodstuff 1 from theprimary package 3. The secondary taking-outcontrol unit 220 differs from the secondary taking-outcontrol unit 120 in that the secondary taking-outcontrol unit 220 has an operation for creating a grip margin. The secondary taking-outcontrol unit 220 includes a preparatory gripoperation control unit 221, an up-downoperation control unit 222 and a main gripoperation control unit 223. -
Fig. 8 is a view for explaining the function of the preparatory gripoperation control unit 221. The preparatory gripoperation control unit 221 controls thedual arm robot 10 to grip a specified portion of theplastic bag 2 of the primary package 3 (see the left view inFig. 8 ), lift up theprimary package 3 by a specified displacement amount (see the central view inFig. 8 ) and release the primary package 3 (see the right view inFig. 8 ), prior to taking out the foodstuff 1 from the taking-out mouth 6. -
Fig. 9 is a view for explaining the functions of the up-downoperation control unit 222 and the main gripoperation control unit 223. The up-downoperation control unit 222 operates thedual arm robot 10 to move upward or downward in a state that thedual arm robot 10 has released theprimary package 3 under the control of the preparatory gripoperation control unit 221. Thus the up-downoperation control unit 222 shifts the position where thedual arm robot 10 grips theprimary package 3 in a main grip operation (see the left view inFig. 9 ). In the first modified example, the up-downoperation control unit 222 operates thedual arm robot 10 to move upward by about 30 cm to 50 cm. The main gripoperation control unit 223 causes thedual arm robot 10 to grip a specified portion of theprimary package 3 or the vicinity of the specified portion (see the right view inFig. 9 ). - In the control performed by the up-down
operation control unit 222, the distance of upward movement or downward movement of thedual arm robot 10 and the number of the preparatory grip operations may be set by a user. For example, a screen for setting the position of the grip margin and the number of the preparatory grip operations may be displayed on a touch panel so as to receive the selection of "high", "middle" and "low" options and the number of the preparatory grip operations inputted by a user. Since the movement distance of thedual arm robot 10 controlled by the up-downoperation control unit 222 may be zero, the secondary taking-outcontrol unit 220 may be configured not to include the up-downoperation control unit 222. - As described above, with the
unpacking device 200 according to the first modified example, thedual arm robot 10 performs the operation of creating the grip margin, whereby the amount of the contents (the foodstuff 1) gripped during the main grip operation can be made smaller than the amount of the contents (the foodstuff 1) gripped during the preparatory grip operation. This makes it difficult for the contents (the foodstuff 1) to remain within the primary packing material (the plastic bag 2) when thedual arm robot 10 of theunpacking device 200 grips the primary packing material (the plastic bag 2) and takes out the contents (the foodstuff 1) without forming an incision in the primary packing material (the plastic bag 2). - In a second modified example of the above-described embodiment, description will be made on an unpacking device in which an articulated robot takes out a sealed plastic bag from a package formed of an incised cardboard box, grips the plastic bag, makes an incision in the plastic bag and takes out contents through the incision.
- In the second modified example, just like the above-described embodiment, it is supposed that a foodstuff as a raw material is put into a snack food production line. The second modified example differs from the above-described embodiment in terms of the foodstuff packing state. In the above-described embodiment, a foodstuff 1 as contents is contained in the
plastic bag 2 as the primary packing material. Theprimary package 3 is formed by folding the taking-out mouth 6. In the second modified example, a primary package 23 (not shown) is formed by putting a foodstuff 1 as contents into a plastic bag 22 (not shown) as a primary packing material in a sealed state. As in the above-described embodiment, a secondary package 25 (not shown) is formed by packing the primary package 23 with acardboard box 4 as a secondary packing material. - The foodstuff packing state is substantially the same as the foodstuff packing state available in the embodiment shown in
Figs. 1 and2 . The plastic bag 22 of the second modified example corresponds to theplastic bag 2 of the above-described embodiment. The plastic bag 22 of the second modified example differs from theplastic bag 2 of the above-described embodiment in that the mouth of the plastic bag 22 is closed by thermal welding. The primary package 23 of the second modified example corresponds to theprimary package 3 of the above-described embodiment. While the contents are not sealed in theprimary package 3 of the above-described embodiment, the contents are kept sealed in the primary package 23 of the second modified example. The secondary package 25 of the second modified example corresponds to thesecondary package 5 of the above-described embodiment. While the primary package 23 is packed by the secondary package 25 of the second modified example, theprimary package 3 is packed by thesecondary package 5 of the above-described embodiment. -
Fig. 10 is a block diagram schematically showing anunpacking device 300 according to the second modified example. As shown inFig. 10 , theunpacking device 300 includes thedual arm robot 10, the primary taking-outcontrol unit 110 and a secondary taking-outcontrol unit 320. In the second modified example, the primary taking-outcontrol unit 110 and the secondary taking-outcontrol unit 320 serve as a control unit. The same components as those of the above-described embodiment will be designated by like reference symbols and redundant description thereof will be omitted. - Just like the secondary taking-out
control unit 120 of theunpacking device 100 of the above-described embodiment, the secondary taking-outcontrol unit 320 controls thedual arm robot 10 to can take out the foodstuff 1 from the primary package 23. The secondary taking-outcontrol unit 320 differs from the secondary taking-outcontrol unit 120 in that the secondary taking-outcontrol unit 320 controls thedual arm robot 10 to perform an incising operation for making an incision in the plastic bag. The secondary taking-outcontrol unit 320 includes an incisingoperation control unit 324. - The incising
operation control unit 324 controls thedual arm robot 10 to perform an incising operation in which the plastic bag 22 of the primary package 23 is gripped by one robot arm of thedual arm robot 10 and is incised by the other robot arm of thedual arm robot 10. - As described above, with the
unpacking device 300 according to the second modified example, thedual arm robot 10 first takes out the primary package 23 from the secondary package 25, then makes an incision in the primary packing material (the plastic bag 2) and then takes out the contents (the foodstuff 1) from the incision. This makes it difficult for the scraps of the primary packing material (the plastic bag 22) and the secondary packing material (the cardboard box 4) to be mixed in the contents (the foodstuff 1). - For example, if the contents are not so good for a human body, it is undesirable to manually perform an unpacking operation. The
unpacking device 300 according to the second modified example is very useful in this situation. In case where the contents are not so good for a human body, the primary package 23 is formed by, e.g., putting the contents into the primary packing material (the plastic bag 22) in a sealed state as in the second modified example. For example, the secondary package 25 is formed by packing the primary package 23 with a secondary packing material stronger than thecardboard box 4. The secondary packing material stronger than thecardboard box 4 refers to a container, e.g., a drum can, which is not readily deformed even if a considerable external force is applied thereto. In case of a strong container such as a drum can or the like, however, it is difficult to form an incision by the cutting operation as applied to the cardboard box. For that reason, instead of the packingmaterial cutting unit 12, a lid opening device for opening a lid of a container needs to be employed in the process layout of the above-described embodiment. - In a third modified example of the above-described embodiment, description will be made on an instance where an operation for creating a cutting margin is added to the
unpacking device 300 of the second modified example. In this regard, the term "operation for creating a cutting margin" means a preparatory grip operation of gripping a specified portion of theplastic bag 2, lifting up theplastic bag 2 and releasing theplastic bag 2, just like the grip margin creating operation of the first modified example. -
Fig. 11 is a block diagram schematically showing anunpacking device 400 according to the third modified example. As shown inFig. 11 , theunpacking device 400 includes adual arm robot 10, a primary taking-outcontrol unit 110 and a secondary taking-outcontrol unit 420. In the third modified example, the primary taking-outcontrol unit 110 and the secondary taking-outcontrol unit 420 serve as a control unit. The same components as those of the above-described embodiment, the first modified example and the second modified example will be designated by like reference symbols and redundant description thereof will be omitted. - Just like the secondary taking-out
control unit 320 of theunpacking device 300 of the second modified example, the secondary taking-outcontrol unit 420 controls thedual arm robot 10 so that thedual arm robot 10 can take out the foodstuff 1 from the primary package 23. The secondary taking-outcontrol unit 420 differs from the secondary taking-outcontrol unit 320 in that the secondary taking-outcontrol unit 420 has an operation for creating a cutting margin. The secondary taking-outcontrol unit 420 includes a preparatory gripoperation control unit 221, an operationpause control unit 421, an up-downoperation control unit 222, a main gripoperation control unit 223 and an incisingoperation control unit 324. - The operation
pause control unit 421 controls thedual arm robot 10 so that thedual arm robot 10 can cease to operate for a specified time while gripping a specified portion of the plastic bag 22 under the control of the preparatory gripoperation control unit 221. In the third modified example, the specified time is approximately several seconds or several tens of seconds. - The pause control for pausing the operation of the
dual arm robot 10 for the specified time under the control of the operationpause control unit 421 is performed in anticipation of an effect that the contents having a relatively small particle size, such as flour or the like, are dropped downward so as to increase the cutting margin. The pause control may be applied to the first modified example. If the particle size of the contents is larger than a specified size, it is difficult to expect the pause control effect. This means that the operationpause control unit 421 is not an essential element. - As described above, with the
unpacking device 400 according to the third modified example, thedual arm robot 10 performs the operation for creating the cutting margin. This makes it possible to restrain the contents (the foodstuff 1) from scattering when an incision is formed in the primary packing material (the plastic bag 22). - The unpacking
devices cardboard box 4. If thepackage conveying unit 11, the packingmaterial cutting unit 12 and thescrap removal unit 13 are added to the respective unpacking devices, it becomes possible to realize an unpacking device capable of unpacking a package formed of acardboard box 4 having no incision (which corresponds to the area indicated by a broken line G inFig. 3 ). - The present invention can find its application in all kinds of unpacking devices for unpacking a package and taking out contents. With the present invention, it is possible to perform an unpacking operation so that the scraps of a packing material should not be mixed in the contents. Therefore, the present invention is very high in industrial applicability.
- While the invention has been shown and described with respect to the embodiments, it will be understood by those skilled in the art that various changes and modification may be made without departing from the scope of the invention as defined in the following claims.
Claims (11)
- An unpacking device comprising:a robot; anda control unit configured to control the robot such that the robot takes out a primary package through an incision of a secondary packing material of a secondary package and then takes out content from the primary packagewherein the primary package is formed by packing the content with a primary packing material, and the secondary package is formed by packing the primary package with the secondary packing material.
- The device of claim 1, wherein the control unit is configured to control the robot such that the robot takes out the primary package through the incision of the secondary packing material by own weight of the primary package.
- The device of claim 1 or 2, wherein the primary packing material is a flexible bag, and the control unit is configured to control the robot such that the robot grips the primary packing material of the primary package, lifts up the primary packing material and takes out the content from the bag by own weight of the content.
- The device of claim 3, wherein the control unit is configured to control the robot such that, prior to taking out the content, the robot performs a preparatory grip operation of gripping a specified portion of the primary packing material of the primary package, lifting up the primary package by a specified displacement amount and releasing the primary package and a main grip operation of gripping the specified portion or the vicinity of the specified portion.
- The device of claim 4, wherein the control unit is configured to control the robot such that the robot performs an up-down operation between the preparatory grip operation and the main grip operation and, in the up-down operation, the robot is moved upward or downward in a state that the robot has released the primary package in the preparatory grip operation so that the position where the robot grips the primary package in the main grip operation is shifted.
- The device of claim 1 or 2, wherein the primary packing material is a flexible bag, the content is sealed within the primary packing material of the primary package, and the control unit is configured to control the robot such that the robot grips the primary packing material of the primary package, forms an incision in the primary packing material and takes out the content through the incision using the own weight of the content.
- The device of claim 6, wherein the control unit is configured to control the robot such that, prior to forming the incision in the primary packing material, the robot performs a preparatory grip operation of gripping a specified portion of the primary packing material of the primary package, lifting up the primary package by a specified displacement amount and releasing the primary package and a main grip operation of gripping the specified portion or the vicinity of the specified portion.
- The device of claim 7, wherein the control unit is configured to control the robot such that the robot performs an up-down operation between the preparatory grip operation and the main grip operation and, in the up-down operation, the robot is moved upward or downward in a state that the robot has released the primary package in the preparatory grip operation so that the position where the robot grips the primary package in the main grip operation is shifted.
- The device of claim 7 or 8, wherein the control unit is configured to control the robot such that the robot ceases to operate for a specified time while gripping the specified portion of the primary packing material in the preparatory grip operation.
- The device of any one of claims 1 to 9, further comprising:a packing material cutting unit for forming the incision in the secondary packing material by cutting the secondary packing material of the secondary package in a location other than a location where the primary package is taken out by the robot and other than a location where the content is taken out by the robot;a conveying unit for conveying the secondary package from the packing material cutting unit to an operation region of the robot; anda scrap removal unit for removing scraps generated during the cutting operation from the secondary package in a location between the packing material cutting unit and the operation region of the robot, other than the location where the primary package is taken out by the robot and other than the location where the content is taken out by the robot.
- An unpacking method for unpacking a package and taking out content, the package including a primary package formed by packing the content with a primary packing material and a secondary package formed by packing the primary package with a secondary packing material, the unpacking method comprising:forming an incision in the secondary packing material of the secondary package; andtaking out the primary package through the incision of the secondary packing material and then taking out the content from the primary package through the use of a robot.
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JP2011244423A JP5413436B2 (en) | 2011-11-08 | 2011-11-08 | Unpacking device and manufacturing method of unpacked goods |
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EP4112240A1 (en) * | 2021-06-28 | 2023-01-04 | Bayer AG | Autonomous manipulation of a flexible primary package in a dimensionally stable secondary package by means of robots |
Also Published As
Publication number | Publication date |
---|---|
BR102012027452A2 (en) | 2015-06-23 |
CN103086028B (en) | 2015-09-09 |
JP2013100118A (en) | 2013-05-23 |
JP5413436B2 (en) | 2014-02-12 |
EP2592007B1 (en) | 2015-12-30 |
CN103086028A (en) | 2013-05-08 |
US20130125517A1 (en) | 2013-05-23 |
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