A STORAGE UNIT FOR SMT SUPPLIES
20220055834 · 2022-02-24
Assignee
Inventors
Cpc classification
B65G1/045
PERFORMING OPERATIONS; TRANSPORTING
H05K13/086
ELECTRICITY
B65G1/06
PERFORMING OPERATIONS; TRANSPORTING
International classification
B65G1/06
PERFORMING OPERATIONS; TRANSPORTING
B65G1/133
PERFORMING OPERATIONS; TRANSPORTING
Abstract
The present invention provides a storage unit for Surface Mount Technology (SMT) supplies, comprising a plurality of stacks having vertically stacked storage locations for SMT supplies, a terminal for inserting and receiving SMT supplies to and from said storage unit, a first collector arm for transporting SMT supplies between storage locations and said terminal, said collector arm being moveably arranged along said stacks so as to enable engagement with the vertically stacked storage locations of a stack. Further, the plurality of stacks are arranged in at least one cluster of two or more stacks in each cluster, wherein each stack of said at least one cluster is moveably arranged in relation to said collector arm so as to allow engagement of said collector arm with different stacks of the cluster upon movement of said two or more stacks in the cluster, thereby allowing said collector arm to engage storage locations of different stacks in said at least one cluster. The present invention further provides a method for operating a storage unit for SMT supplies.
Claims
1. A storage unit for Surface Mount Technology (SMT) supplies, comprising a plurality of stacks having vertically stacked storage locations for SMT supplies, a terminal for inserting and receiving SMT supplies to and from said storage unit, a first collector arm for transporting SMT supplies between storage locations and said terminal, said collector arm being moveably arranged along said stacks so as to enable engagement with the vertically stacked storage locations of a stack, and wherein said plurality of stacks are arranged in at least one cluster of two or more stacks in each cluster, wherein each stack of said at least one cluster is moveably arranged in relation to said collector arm so as to allow engagement of said collector arm with different stacks of the cluster upon movement of said two or more stacks in the cluster, thereby allowing said collector arm to engage storage locations of different stacks in said at least one cluster.
2. A storage unit according to claim 1, wherein the first collector arm is rotatably arranged around a vertical axis such that said collector arm is configured to switch between engaging said terminal and said at least one cluster upon rotational movement around said vertical axis.
3. A storage unit according to claim 1, wherein said clusters are spaced around a vertical axis and further wherein said first collector arm is moveably arranged along said vertical axis and rotatably arranged around said vertical axis so as to enable engagement with the vertically stacked storage locations of a stack at a radial position P from said vertical axis.
4. A storage unit according to claim 3, wherein at least one cluster of stacks is a rotatable carousel of two or more stacks, and wherein each carousel is rotatable around an individual carousel axis that is parallel to said vertical axis and arranged to allow different stacks of a carousel to reach the radial access position upon rotation of said carousel around said carousel axis.
5. A storage unit according to claim 1, comprising at least two, such as at least three, such as at least five, clusters of two or more stacks in each cluster.
6. A storage unit according to claim 1, wherein each cluster comprises at least three, such as at least five, stacks having vertically stacked storage locations.
7. A storage unit according to claim 1, wherein the stacks of at least one cluster are arranged in a moveable loop such that a movement of the stacks in the loop allows said first collector arm to engage storage locations of different stacks in said moveable loop.
8. A storage unit according to claim 1, wherein at least one cluster comprises X number of static stack positions occupied by less or equal to X−1 stacks, and wherein a rearrangement of said X−1 stacks in said stack positions allows said first collector arm to engage storage locations of different stacks in said cluster.
9. A storage unit according to claim 1, wherein the clusters are moveably arranged in relation to said first collector arm.
10. A storage unit according to claim 9, wherein the clusters are arranged onto individual vehicles capable of moving freely in relation to said first collector arm.
11. A storage unit according to claim 1, wherein the SMT supplies are stored in component reels, and said reels are arranged in the vertically stacked storage locations of said stacks.
12. A storage unit according to claim 1, further comprising a second terminal for inserting and receiving SMT supplies to and from the unit, and a second collector arm arranged for transporting SMT supplies between storage locations and said second terminal, said second collector arm being moveably arranged in the vertical direction along said stacks so as to enable engagement with the vertically stacked storage locations of a stack.
13. A storage unit according to claim 12, wherein the clusters of stacks are arranged into at least a first group of clusters, which is arranged for allowing engagement with only the first collector arm, at least one shared cluster, which is arranged for allowing different stacks of the shared cluster to engage with both collector arms simultaneously, and at least a second group of clusters, which is arranged for allowing engagement with only the second collector arm.
14. A storage unit according to claim 13, wherein the stacks of at least one shared cluster are arranged in a moveable loop such that a movement of the stacks in the loop allows said collector arms to engage storage locations of different stacks in said moveable loop.
15. A storage unit according to claim 1, wherein the SMT supplies comprises electronic and/or electrical components.
16. A method for operating a storage unit for SMT supplies according to claim 1, comprising the steps of a1) receiving a first input data representing a first target location of a target stack for the collector arm; b1) moving at least one stack of a cluster to enable engagement with the vertically stacked storage locations of the target stack by said collector arm; c1) moving said collector arm from the terminal into engagement with said first target location of said target stack and collecting or storing a component of the SMT supplies at said first target location; and d1) moving the collector arm back to the terminal.
17. A method according to claim 16, further comprising the steps of a2) receiving a second input data representing a second target location of a target stack for the collector arm; b2) moving at least one stack of a cluster to enable engagement with the vertically stacked storage locations of the target stack by said collector arm; c2) moving said collector arm from the terminal into engagement with said second target location of said target stack and collecting or storing a component of the SMT supplies at said second target location; and d2) moving the collector arm back to the terminal; wherein at least one of steps a2) and b2) are performed simultaneously as any one of steps c1) or d1).
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0090] The above, as well as additional objects, features and advantages of the present inventive concept, will be better understood through the following illustrative and non-limiting detailed description, with reference to the appended drawings. In the drawings like reference numerals will be used for like elements unless stated otherwise.
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DETAILED DESCRIPTION
[0103]
[0104] The footprint of the storage unit may be less than 4 m.sup.2, such as less than 2 m.sup.2.
[0105] The input/output device may be integrated in the storage unit, e.g. as a part of the frame 11, or it may be an external device configured to communicate with the control unit 14. The user indication data may be received from an operator or retrieved as information from and SMT information database.
[0106]
[0107] The stacks 2 having vertically stacked storage locations 3 may extend to the top of the storage unit 1. A single stack 2 may have more than 50 storage locations, such as more than 100 storage locations, such as more than 500 storage locations, that are stacked on top of each other. The storage locations 3 may be for store component reels, such as store component tape reels being between 5 and 50 mm thick with a diameter of between 80 mm to 400 mm. The reels may be stored directly in the storage locations 3 or may be stored in bins or trays at the storage locations 3.
[0108] The stacks 2 are in this embodiment arranged in two clusters 7a, 7b of five stacks in each cluster. Each cluster 7a, 7b comprises a stationary base plate 8 onto which the stacks are rotatably arranged around a vertical rotational axis Zi. Thus, the stacks 2 of cluster 7a are rotatably arranged around vertical axis Z1, as illustrated by arrow “C” in
[0109] The clusters 7a,b are spaced around a vertical axis (Z) and the collector arm 5 is moveably arranged in the vertical direction along stacks and along axis Z, as illustrated by arrow “A”. The collector arm 5 may for example be moveably arranged in the vertical direction along a shaft 6 that extends in the vertical direction Z. This enables engagement with the vertically stacked storage locations of a stack 2. The collector arm 5 may be a robotic arm equipped with engagement means 10 for gripping and releasing e.g. a reel or a bin at a storage location 3. The collector arm may thus function as an actuator.
[0110] In this example, the collector arm 5 is also rotatably arranged around shaft 6, and thus rotatably arranged around vertical axis (Z), as illustrated by arrow “B” in
[0111] Due to the rotationally supported stacks 2, each cluster 7a,b is moveably arranged in relation to the collector arm 5 so as to allow engagement collector arm with different stacks 2 of a cluster 7a,b, thereby allowing the collector arm 5 to engage vertically stacked storage locations 3 of different stacks 2 in the cluster 7a,b. For example, this allows for stack 2a in cluster 7a to be rotated into a position in which the collector arm 5 can engage and access the storage locations, and then be rotated away from the collector arm 5 to allow e.g. stack 2b to be accessed instead. Further, stacks 2c or 2d from cluster 7b may be rotated into an engagement position at radial distance P from vertical axis (Z) meanwhile the collector arm 5 engages the storage locations from cluster 7a. In this way, the storage capacity of the storage unit is increased as compared to a storage unit having static stacks, without increasing the access or picking time.
[0112] Consequently, in this embodiment, the clusters for rotatable carousels for the stacks, i.e. the clusters are able to rotate and thereby allow different individual stacks of a cluster to reach an engagement position for the collector arm at radial position P from rotational axis (Z) by a rotational movement. The rotational movement may be performed by a stepping motor or similar drive, and with each step of the motor the stacks may rotate one step clockwise or counter-clockwise, thereby allowing an adjacent stack to reach the engagement position at radial position P.
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[0117] The clusters 7 of the storage unit are arranged into a first group of clusters 107a, which is arranged for allowing engagement with only the first collector arm 5a and a second group of clusters 107b, which is arranged for allowing engagement with only the second collector arm 5b. There is also a shared group of clusters 107c, consisting of cluster 7f and 7g, which is arranged for allowing different stacks of the shared cluster to engage with both collector arms 5a, 5b simultaneously.
[0118] The second vertical axis Zb is thus arranged radially outside the rotatable carousels of the first group of clusters 107a as seen from vertical axis Za and at a distance from at least one rotatable carousel of the shared cluster 107c such that the storage locations of the stacks of the at least one rotatable carousels of the shared cluster 107c may be engaged by the second collector arm 5b. Thus, the rotatable carrousels of the second group of clusters 107b are rotatable so as to allow different stacks of a carousel to reach a radial access position upon rotation of the carousel, thereby allowing the second collector arm 5b to access storage locations of different stacks of the carousels of the second group 107c.
[0119] By the use of the two collector arms 5a and 5b, SMT supplies may efficiently be redistributed among all the clusters, such as from the first group of clusters 107a to the second group of clusters 107b via the shared group of clusters 107c.
[0120] The embodiment as shown in
[0121]
[0122] The cluster 7 is not required to be moveable or rotatable in relative the base plate 8, but the storage unit 1 may rely on the motions of the vehicle to allow for the different stacks 2 of the cluster to reach a collector arm 5.
[0123] As seen in
[0124] Thus, during use, the operator may place a component of the SMT supplies at the terminal 4, at which the component is collected by the collector arm 5. A control unit 14 of the storage unit 1 may then call an individual AGV, which then travels to the collector arm 5 and receives the electric component. The collector arm 5 is also in this embodiment arranged to move in the vertical direction along vertical axis (Z) and also rotatable around axis Z.
[0125] In analogy, when an operator requests a specific electric component, the control unit 14 may call the corresponding AGV which travels to the collector arm 5 for providing the requested electric component. The collector arm may then engage the target storage location and present the requested electric component at the terminal 4.
[0126] A terminal 4 and a collector arm 5 may in the embodiment shown in
[0127] As discussed above, the storage unit 1 may further comprise an input/output device 9 that is adapted to receive user indication data and to send the user indication data to a control unit 14. The control unit 14 may thus be configured to carry out a method for controlling one or several electrical motors for moving and rotating a collector arm and steppermotors or similar drives for moving the clusters.
[0128] For this purpose, the control unit 14 may comprise a processing unit, such as a central processing unit, which is configured to execute computer code instructions which for instance may be stored on a memory. The memory may thus form a (non-transitory) computer-readable medium for storing such computer code instructions. The processing unit may alternatively be in the form of a hardware component, such as an application specific integrated circuit, a field-programmable gate array or the like.
[0129] The control unit 14 may be connected to motors for controlling the collector arms and to stepping motors for controlling the movements of the clusters. The control unit 14 may therefore comprise a communication interface, such as a transmitter/receiver, via which it may receive data from the various electrical motors. The received data may for instance include data on position of the collector arm and the position of the stacks in the clusters. The transmitted data may for instance include a control signal for controlling the various electrical motors.
[0130] Consequently, the control unit 14 may be configured for carrying out a method for retrieving and presenting objects in a storage unit of the present disclosure. The method is illustrated in
[0131] a1) receiving a first input data representing a first target location of a target stack for the collector arm;
[0132] b1) moving at least one stack of a cluster to enable engagement with the vertically stacked storage locations of the target stack by said collector arm;
[0133] c1) moving said collector arm from the terminal into engagement with said first target location of said target stack and collecting or storing a component of the SMT supplies at said first target location; and
[0134] d1) moving the collector arm back to the terminal.
[0135] The method may further comprise the steps of
[0136] a2) receiving a second input data representing a second target location of a target stack for the collector arm;
[0137] b2) moving at least one stack of a cluster to enable engagement with the vertically stacked storage locations of the target stack by said collector arm;
[0138] c2) moving said collector arm from the terminal into engagement with said second target location of said target stack and collecting or storing a component of the SMT supplies at said second target location; and
[0139] d2) moving the collector arm back to the terminal.
[0140] The stacks of another cluster may be moved into a desired position while the collector arm 5 picks components or deliver components to the terminal 4. Consequently at least one of steps a2) and b2) may performed simultaneously as any one of steps c1) or d1). This means that the second input data and/or moving the stacks based on this data may be performed during the step of moving the collector arm to the terminal based on instructions in the first input data.
[0141] As discussed above, the storage unit may be an automated Surface Mount Device (SMD) warehouse adapted to obtain information related to upcoming SMT jobs. The method may thus comprise receiving at least one of input data and a parameter representing a position or storage location within said automated Surface Mount Device (SMD) warehouse, retrieving a bin, by the use of a collector arm, loaded with a plurality of bin load units, from said position within said automated SMD warehouse at least partly based on said at least one of input data and/or a parameter representing said position within said automated Surface Mount Device (SMD) warehouse and presenting, by the use of a collector arm, the retrieved bin at, or close to an output port of the automated Surface Mount Device (SMD) warehouse. Thus, in the technology disclosed, the collector arm 5, e.g. a mechanical hand or robot arm, is adapted to be controlled by the processor of the control unit 14 to receive e.g. a bin at a terminal of an automated Surface Mount Device (SMD) warehouse. The collector arm may further be adapted to store the bin at a storage location or position within the automated Surface Mount Device (SMD) warehouse and the control unit may be configured to store the position and alternatively a bin ID, a pallet ID, a component tape reel ID or an SMT feeder ID in a memory.
[0142] In the technology disclosed, the storage unit 1 may itself have a large physical volume and may further be configured to store bins with a large physical volume.
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[0144] Bin is in this document to be understood as a basket, trolley or accumulator adapted to comprise packet units of component tape reels and optional SMT feeder/tape guide, pallets or any component handled by an SMT pick and place machine in one or more slots or compartments and adapted with an attachment arrangement allowing storage in a position in an automated Surface Mount Device (SMD) warehouse and an SMT pick and place machine, as would be understood by a person skilled in the art.
[0145] The bins 20 may be configured with wheels to form a trolley, e.g. where each bin/trolley is adapted to hold multiple bin load units 22 or even adapted to hold a plurality of baskets each with compartments or slots adapted to hold multiple bin load units 22. The bins or trolleys, which in this aspect of the technology disclosed are adapted to be stored in an automated SMD warehouse, may further be configured to hold a plurality of SMT component tape reels 21, with or without a driving/feeding mechanism, where the bin/trolley is further be arranged to be positioned in an SMT pick and place machine (not shown) for immediate operation. The bins or trolleys 20 may further be configured to feed the components of the component tape reels 21 directly to the pick-up positions associated with a SMT pick and place machine, where said SMT component feeders or tape guides may have a built-in tape advancing mechanism or utilize a tape advancing mechanism of the pick and place machine or the magazine (tape guide), e.g. a feeding wheel or a protrusion utilizing an internal or external drive such as a linear motor.
[0146]
[0147] The SMT component feeder 23 is adapted to feed or advance a pocket tape from the component tape reel 21 and to remove a thin cover tape closing the pockets. The SMT component feeder 23 may have a built-in tape advancing mechanism or utilize a tape advancing mechanism of a SMT pick and place machine (this type of passive component feeder without a built-in tape advancing mechanism or other driving/feeding means/mechanisms that utilizes a tape advancing mechanism of the pick-and-place machine for guiding/feeding the component tape to its pick-up position in the pick-and-place machine is typically referred to as a “tape guide”). The SMT feeder 23 may be arranged to utilize e.g. a feeding wheel or a protrusion utilizing an internal or external drive such as a linear motor or similar drive, in the pick-and-place machine or magazine protrudes through the tape guide into contact with the pre-threaded tape. The SMT component feeder 23, or tape guide, might be adapted to comprise an SMT feeder ID that might be stored and associated to other identities in said SMT information database, e.g. associated to a component tape reel ID. The technology disclosed in this document also enables that the SMT component feeder 23 or tape guide also may be adapted to comprise an SMT feeder ID that might be stored and associated to identities of other types of units such as bin IDs or pallet IDs used in the SMT process, and where the bin IDs or pallet IDs also may be stored as IDs in an SMT information database.
[0148] Furthermore, as seen in
[0149] The alphanumerical display controller of the alphanumerical display 25 can optionally recognize and register bin load units 22 placed in the bin 21, e.g. by scanning barcodes or RFID tags attached to the bin load units. The scanning may be performed manually by a handheld barcode tag/RFID tag scanner or by a barcode tag/RFID tag scanner integrated in the bin 20. Alternatively, the alphanumerical display controller is configured to communicate data, e.g. identities of recognize and register bin load units 22, via a communications network to an SMT information database, e.g. such that information on the content of the bin 20 is available in the SMT information database. Alternatively, the bin 20 is further configured with wheels to form a trolley such that the bin 20 can be retrieved manually or automatically from storage unit 1 and positioned in an SMT pick and place machine 91 for immediate operation.
[0150] In the above the inventive concept has mainly been described with reference to a limited number of examples. However, as is readily appreciated by a person skilled in the art, other examples than the ones disclosed above are equally possible within the scope of the inventive concept, as defined by the appended claims.