US3566802A - Electrically controlled traction device for movable units, especially containers or shelving units - Google Patents

Electrically controlled traction device for movable units, especially containers or shelving units Download PDF

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US3566802A
US3566802A US758456A US3566802DA US3566802A US 3566802 A US3566802 A US 3566802A US 758456 A US758456 A US 758456A US 3566802D A US3566802D A US 3566802DA US 3566802 A US3566802 A US 3566802A
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units
motor drive
gangway
chain
installation according
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US758456A
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Harald O Lundgvist
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B53/00—Cabinets or racks having several sections one behind the other
    • A47B53/02—Cabinet systems, e.g. consisting of cabinets arranged in a row with means to open or close passages between adjacent cabinets

Definitions

  • the units are equipped with rotating coupling devices which are permanently engaged with the traction means and which can be manually braked to a standstill so that the corresponding unitis moved away by the traction means.
  • wear mainly occurs on the brake of the coupling device.
  • Personal skill of the operator is still necessary and the coupling means required on each unit considerably increases the cost.
  • the object of the invention is to provide an electrically controlled traction device in which the motor by itself, or by means of a slight coupling, confers to the traction means a variable speed depending on the load carried and/or the time elapsed.
  • This slip coupling provides the desired elasticity, which with known arrangements is achieved by means of, for instance, a slip between the traction means and the coupling device on each unit, and this is also attained with the units connected in a slip-free way to the traction means.
  • the slip coupling between the motor and the traction means replaces the expensive coupling devices on each movable unit, and these can be equipped with the simplest imaginable catches for the connection to the traction means.
  • the operated unit is coupled to the traction means.
  • the slip coupling preferably transfers no moment of force.
  • the transferred moment of the slip coupling increases in a preset manner from zero to a maximum value. After a certain time, depending on the adjustment of the slip coupling as well as the number and weight of the units to be moved, this moment reaches a level at which the traction means is enabled to put the units into movement. While the moment and hence the force in the traction means further increases, the units are accelerated to a speed of movement which corresponds to the speed of the motor.
  • the units thus get started and accelerated smoothly, independently of their weight and number, without personal interference by the operator.
  • centrifugal clutches should be mentioned. Since their transferred moment depends on the speed of the drive shaft, they offer less possibilities to get a varying moment over a long time than induction couplings. Finally, a multiple-disc clutch with electromagnetic control offers about the same control possibilities as an induction coupling, apart from the fact that the starting moment immediately changes from zero to a minimum value of about half the maximum moment. It further presents noticeable wear.
  • the motor can be started with a switch related to the desired gangway. If each of the movable units has a catch for connection to one traction means or to two synchronously running traction means, the same switch, depending on the position of the units next to the desired gangway, starts the motor in one or the other direction and connects one or the other of the units to the traction means. If the movable units can be connected to one or the other of two parts of an endless traction means, the same switch, depending on the position of the units next to the desired gangway, connects one or the other of these units to the part of the endless traction means which moves in the desired direction.
  • FIG. I is a vertical view of the device of this invention as mounted on movable shelving units.
  • FIG. 2 is a view from above of the installation according to FIG. 1.
  • FIG. 3 is a view from above similar to FIG. 2 referring to an alternative arrangement.
  • FIG. 4 is an enlarged fragmentary vertical sectional view along the line IV-IV of FIG. 2 showing the coupling device mounted on shelving unit 4.
  • F IG. 5 is an enlarged fragmentary vertical sectional view along the line V-V of FIG. 4 showing the coupling device on shelving unit 4 after connection the chain 16.
  • FIG. 6 is a diagrammatic representation of the electrical circuit of FIG. 1.
  • FIG. 7 is a view from above similar to FIG. 2 referring to another alternative arrangement.
  • FIG. 8 is a vertical view similar to FIG. 2 referring to an alternative device of this invention as mounted on a shelving unit.
  • FIG. 9 is a diagrammatic representation of the electrical circuit of FIG. 8.
  • the installation shown in FIG. I and 2 comprises a number of movable shelving units I-5 arranged between fixed units 6 and 7 of which 7 has no active part in the working of the installation.
  • the movable units are fitted with wheels 8, which run on rails 912 on the floor, so that a free space can be opened between optional neighboring shelving units.
  • the shelving units 1-5 are movable by an endless chain 16 running over a drive sprocket I5 and idler sprockets I9 and 20 in fixed unit 6 and over idler sprockets 21 and 41 in fixed unit 7.
  • An electric motor 13 mounted in the fixed unit 6 driven the sprocket I5 and hence the chain 16 through a slip coupling I4 and a reducer 14a.
  • the two parts of the chain 16 run on top of each other guided by the idler sprockets and by rails I7 and I8 (see FIG. 4).
  • FIG. 3 The arrangement shown in FIG. 3 is like that of FIG. 2 except that it has two parallel chains 16 and 16" driven respectively by drive sprockets I5 and I5" and guided by idler sprockets I9, 21), 21' and 41' and by idler sprockets I9", 20", 21" and 41" respectively.
  • the drive sprockets I5 and I5" of the two chains are connected with the motor drive unit I3 (including a slip coupling and reducer as in FIG. 2) through shafts 60' and 69" so that the drive sprockets and the two chains 16' and I6" are driven in synchronism with one another.
  • the arrangement of FIG. 3 has the advantages of a parallel drive of the shelving units and the distribution of the load between two chains.
  • each shelving unit I-5 one resp. two coupling devices are fitted for connection of the shelving unit to the upper part of the chain 16 resp. the chains 16' and I6".
  • These coupling devices consist of a plunger 22 actuated by an electromagnet 23 and fitted with a pin 24 at its lower end, which may be inserted between two links of the chain (FIG. 4).
  • the plunger 22 is pulled somewhat aside so that the shoulder 25 at its lower end hooks under the lower edge 26 of the tube 27.
  • the engagement of the pin 24 in a link of the drive chain provides a positive nonslipping connection between the respective shelving unit and the drive chain.
  • the coupling 14 provides a sliding connection between the drive chain and the motor 13.
  • the coupling is selected from the group consisting of an induction coupling with variable magnetization control, a hydraulic coupling, a centrifugal clutch and a multiple disc clutch with electromagnetic control.
  • the electric control of the motor 13 and the coupling devices is for instance carried out in the following way:
  • the installation is operated by means of pedal switches 29 each of which controls the opening of one gangway.
  • pedal switches or pedals are fitted in a slanting wooden board 30, placed in front of the installation and connected electrically to segmented contact rails on a wooden bar 31 fixed to the front supporting rail 12. Furthermore, all pedals are connected to the electric control line at 24 V tension.
  • the lower series 32 On the wooden bar 31 there are two series of contact rails, the lower series 32, connected to the pedals, is segmented to establish the length of influence for each pedal.
  • the upper series 33 which is also segmented, consists of parts alternately connected to one of two lines generating impulses to start the motor in the right and in the left direction respectively. The segmentation of this series of rails is such that depending on the position of the shelving unit to be driven, an impulse to start in one or the other direction is achieved.
  • the segmentation of the two series of contact rails is made in accordance with the depth of the movable shelving unit.
  • Bar 31 may thus be manufactured in optional length and for a specific depth of shelving unit. (This assumes of course that all movable units in an installation are of the same depth.)
  • the bar is adapted to actual gangwidth by observing that the segments of the two series of contact rails will lie symmetrically to the two ends of the bar (i.e. the distance from the middle between two outer segments in the lower series to each end of the bar should be exactly equal, and be equal to half the gangwidth minus half the depth of the shelving unit). if the bar is thus adapted, it can be used without changes for any gangwidth larger than half the depth of the shelving unit, and smaller than lfiimes this depth.
  • the control of the solenoid 23 in the driven shelving unit is thus achieved by means of the start impulse pedal 29 for the actual gangway, and this is done in such a way that control tension of 24 V is led to a wire to start in a certain direction via the related segment in the lower series of contact rails 32, a brush against it, the solenoid 23, a brush against the upper series of contact rails 33 and one of its segments.
  • the electric circuit is first maintained during a distance of movement of almost half the depth of the shelving unit, then the brush against the upper series of contact rails changes segment and in fact closes the circuit for impulse to start in the other direction. Since the electric circuit is locked, the motor 13 cannot reverse. The solenoid 23 is thus still under tension.
  • Each start impulse pedal 29 is equipped with a Reed relay a current relay connected in such a way that the pedal is short-circuited after only a short impulse through sharp pressing of the pedal. Hence only a short impulse to start secures desired hooking in of the coupling device.
  • the brushes 42 have to be fitted differently onto each shelving unit, namely one-fourth depth of the shelving unit to the left and the right of the middle of every second shelving unit. If all brushes were fitted equally on all shelving units, only gangwidths up to the depth of the shelving unit would be controlled automatically.
  • the pedal related to the desired gangway couples one or the other of the shelving units depending on their position.
  • a safety device in the form of pressure sensitive mats 38 between the rails below the shelving units or 43 on the kick boards of the movable units, are short-circuited. If such mats are used on the kick boards, two uninterrupted contact rails 39-40 are fitted on a second wooden bar 44, against which two optionally located brushes slide.
  • the described installation is not provided with any flexible electric wires to the shelving units.
  • the operation occurs automatically after pressing a start impulse pedal 29-which is located exactly in front of the desired gangway.
  • the device automatically chooses the shelving unit to be driven and the direction of movement achieving the desired gangway.
  • direction lines are marked on the slanting board 30, which point towards the opening between the two shelving units, which will move apart after pressing the pedal.
  • pedals may of course be provided with corresponding double numbers instead of direction lines so that, for instance, pedal 12 opens a gangway between the shelving units 1 and 2.
  • FIGS. 8 and 9 show an alternative device of this invention in which these requirements are taken into account, so that safeguards become optional. Furthermore, this version does not provide fully automatic choice-of direction of movement depending on the position of the units. For each gangway position, two pedals are provided, one for movement to the left and one for movement to the right. Instead of the relatively complicated arrangement of contact rails and brushes, the solenoid on each unit is directly connected by means of a flexible cable with twoadjacent pedals for different directions of movement and related to different gangways.
  • HO. 8 thus shows only the front support rail 12 and in front of this, pedals 29' for movement to -the right and 29" for movement to the left.
  • a flexible cable 46 one for each movable unit.
  • This cable connects the solenoid 23, which influences the pin 24, on a movable unit with the two pedals 29' and 29" related to the gangways on' both sides of this movable unit.
  • the gangways can be of optional width and are not limited to l /times' the depth of the unit at themost, I
  • FIG. 9 shows the simplified circuit diagram provided for this alternative device.
  • the contactors G and D are replaced by relays for 24 V control tension.
  • a short reversing movement with the aid of a discharging condenser 36 over the relay D or G is provided to facilitate release of the connection between the pin and the chain, but as the installation is no longer only operated by means of an impulse, the hooking in as described above (FlG.,5) is unnecessary.
  • diodes 47 are provided in order to avoid undesired charging of these condensers.
  • a safeguard as shown on FIG. 6 can of course be pro-' vided also in this alternative device of the invention, if desired or if the traction force and/or the energy of movement is higher than what is acceptable for installations without safeguard.
  • FIG. 8 a cable 48 connects two adjacent units.
  • This cable can for instance be fixed by its right end on an iron plate 49 on one unit and have a handle 50 with a permanent magnet at the other end. This magnet is placed on an iron plate on the next unit on the left. With all these cables placed according to the FIG. 8, an electric connection is provided between the two fixed units 6 and 7. 1
  • each shelvingunit must be provided with two coupling devices controlled by solenoids 23a, which are coupled to one or the other of the parts of the traction means moving in opposite direction, so that the driven shelving unit can be moved in the desired direction.
  • a storage installation comprising a plurality of movable storage units and means for selectively moving said units toward and away from one another to open a gangway between selected units, said means comprising motor drive means, flexible traction means extending in the direction of movement of said units, slip coupling means for coupling said flexible traction means to said motor drive means, individual connecting means for selectively coupling individual ones of said units firmly to said flexible traction means in nonslipping relation thereto, each said connecting means comprising catch means mounted on individual ones of said units and movable between an engaged position in which said catch means is engaged with said flexible traction means to connect the respective unit thereto and a disengaged, position out of engagement with said flexible traction means, means biasing said catch means toward disengaged position, electromagnetic means energizable to move said catch means toengaged position to position by said biasing means upon cessation of transmission of said force when said electromagnetic means is deenergizcd, and control means controlling the operation of said motor -drive and the selective actuation of saidconnecting means
  • said traction means comprises at least one link chain and in which said catch means comprises a pin engageable in a link of said chain and a plunger carrying said pin, said electromagnetic means when energized moving'said plunger in a lengthwise direction to engage said pin in a link ofs aid chain.
  • said biasing means comprises spring means for moving said plunger in a direction to disengage said pin from said chain.
  • said holding means includes a cylinder in which said plunger is freely slidable and laterally movable, and a shoulder on said plunger engageable with an end of said sleeve to hold said plunger in chain-engaging position when said plunger is moved laterally by the pull of said chain on said pin.
  • said motor drive means comprises means for reversing the direction of movement of said chain, and in which said plunger is released for disengaging movement by said spring when the direction of movement of said chain is reversed.
  • a storage installation in which said traction means comprises a link chain and in which said catch means is engageable with a link of said chain.
  • said motor drive means comprises means for reversing the direction of movement of said chain and in which said holding means comprises means for retaining said catch means in chain-engaging position as long as said chain is moving in one direction and for releasing said catch means from said chain when the direction of movement of said chain is reversed.
  • control means comprises means for automatically reversing said motor drive means at the end of movement of said chain in one direction to release said catch means.
  • a storage installation in which said traction means comprises a plurality of parallel link chains, and in which said motor drive means comprises means for simultaneously driving said chains in synehronism with one another.
  • a storage installation in which said motor drive means and 'said connecting means are electrically operated and in which said control means comprises electric circuit means for momentarily energizing said electromagnetic means to connect selected units to said traction means and for concurrently energizing said motor drive means.
  • a storage installation in which said motor drive means is reversible to drive said traction means selectively in opposite directions, and in which said control means comprises means for selecting the direction of movement of said traction means depending on the location of said units with respect to the gangway to be opened.
  • control means comprises individual switch means for each gangway to be opened.
  • a storage installation in which said switch means comprises a single switch pedal at each gangway location and in which said control means comprises means for determining the direction of movement of selected units according to the position of said units with respect to the gangway to be opened.
  • control means comprises sectionalized contact rails and contacts carried by individual units electrically engageable with said rails.
  • control means comprises safety means for preventing operation of said drive means to move selected units to close an existing gangway when said gangway is occupied.
  • a storage installation comprising a plurality of movable storage units and means for selectively moving said units toward and away from one another to open a gangway between selected units, said means comprising motor drive means, flexible traction means extending in the direction of movement of said units, sliding coupling means for coupling said traction means to said motor drive means, connecting means for selectively coupling individual ones of said units firmly to said traction means in nonslipping relation thereto and control means controlling the operation of said motor drive and the selective actuation ofsaid connecting means to move one or more of said units to open a gangway between designated storage units, said motor drive means and said connecting means being electrically operated and said control means comprising electric circuit means for actuating said connecting means to connect selected units to said traction means and for concurrently energizing said motor drive means, including individual switch means positioned at the location of each gangway to be opened, said motor drive means being reversible and said individual switch means comprising two switch pedals at individual gangway locations, one of said pedals being operable to operate said
  • a storage installation comprising a plurality of movable storage units and means for selectively moving said units toward and away from one another to open a gangway between selected units, said means comprising motor drive means, flexible traction means extending in the direction of movement of said units, sliding coupling means for coupling said traction means to said motor drive means, connecting means for selectively coupling individual ones of said units firmly to said traction means in nonslipping relation thereto and control means controlling the operation of said motor drive and the selective actuation of said connecting means to move one or more of said units to open a gangway between designated storage units, said motor drive means and said connecting means being electrically operated and said control means comprising electric circuit means for actuating said connecting means to connect selected units to said flexible traction means and for concurrently energizing said motor drive means, said control means comprising safety means for preventing operation of said drive means to move selected units to close an existing gangway that is occupied, said safety means comprising disconnectable electric cables extending between adjacent units in position to be disconnected to afford entry to a

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US758456A 1967-09-12 1968-09-09 Electrically controlled traction device for movable units, especially containers or shelving units Expired - Lifetime US3566802A (en)

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Application Number Priority Date Filing Date Title
CH1281467A CH479466A (de) 1967-09-12 1967-09-12 Elektrisch gesteuerter Antrieb für verschiebbare Behälter oder Lagerregale

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3957322A (en) * 1975-03-06 1976-05-18 Estey Corporation Control means for selectively shifting storage units
US3961831A (en) * 1974-03-23 1976-06-08 Bar Productions (Bromsgrove) Limited Storage assemblies
US4017131A (en) * 1970-09-22 1977-04-12 J. Gestle, Ag Maximum density mobile storage system
US4412772A (en) * 1970-03-17 1983-11-01 Elecompack Company, Ltd. Shiftable article storage device
US4944231A (en) * 1988-02-29 1990-07-31 Pipp Mobile Systems, Inc. Mobile storage system with driving assemblies
US5024164A (en) * 1988-02-29 1991-06-18 Pipp Mobile Systems, Inc. Mobile storage system with improved driving assemblies
US6070534A (en) * 1996-03-02 2000-06-06 Koenig & Bauer-Albert Aktiengesellschaft Conveying system
US20040004051A1 (en) * 2000-10-26 2004-01-08 Kunio Miyazaki Power-assisted movable rack
US20050132924A1 (en) * 2003-11-17 2005-06-23 Bothun Richard A. Track system for modular storage
US20060043813A1 (en) * 2004-08-27 2006-03-02 Delta Electronics, Inc. Stator structures
USD525006S1 (en) 2004-11-17 2006-07-11 Wenger Corporation Modular storage unit
USD530053S1 (en) 2004-11-17 2006-10-10 Wenger Corporation Modular storage unit
US20060231517A1 (en) * 2003-11-17 2006-10-19 Bothun Richard A Modular storage system for logistical management of operational units
US20070216120A1 (en) * 2003-11-17 2007-09-20 Bothun Richard A All-terrain retail merchandising unit
US20110266241A1 (en) * 2010-05-03 2011-11-03 Oto Melara S.P.A. System for moving crates for storing objects in a warehouse
US10870542B1 (en) * 2019-10-31 2020-12-22 Toyota Motor Engineering & Manufacturing Manually-initiated synchronization apparatuses for connecting independently-driven platforms to conveying platforms for movement therewith

Citations (4)

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Publication number Priority date Publication date Assignee Title
US2379267A (en) * 1941-02-20 1945-06-26 Wilson Gilbert Thomas Apparatus for launching or assisting in the launching of airplanes
US2936718A (en) * 1957-05-29 1960-05-17 Si Handling Systems Two truck systems
US3168361A (en) * 1962-04-26 1965-02-02 Elecompack Co Ltd Shiftable stack assembly
US3186355A (en) * 1960-04-15 1965-06-01 Epco Inc Automated storage systems

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2379267A (en) * 1941-02-20 1945-06-26 Wilson Gilbert Thomas Apparatus for launching or assisting in the launching of airplanes
US2936718A (en) * 1957-05-29 1960-05-17 Si Handling Systems Two truck systems
US3186355A (en) * 1960-04-15 1965-06-01 Epco Inc Automated storage systems
US3168361A (en) * 1962-04-26 1965-02-02 Elecompack Co Ltd Shiftable stack assembly

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4412772A (en) * 1970-03-17 1983-11-01 Elecompack Company, Ltd. Shiftable article storage device
US4017131A (en) * 1970-09-22 1977-04-12 J. Gestle, Ag Maximum density mobile storage system
US3961831A (en) * 1974-03-23 1976-06-08 Bar Productions (Bromsgrove) Limited Storage assemblies
US3957322A (en) * 1975-03-06 1976-05-18 Estey Corporation Control means for selectively shifting storage units
US4944231A (en) * 1988-02-29 1990-07-31 Pipp Mobile Systems, Inc. Mobile storage system with driving assemblies
US5024164A (en) * 1988-02-29 1991-06-18 Pipp Mobile Systems, Inc. Mobile storage system with improved driving assemblies
US6070534A (en) * 1996-03-02 2000-06-06 Koenig & Bauer-Albert Aktiengesellschaft Conveying system
US20040004051A1 (en) * 2000-10-26 2004-01-08 Kunio Miyazaki Power-assisted movable rack
US7032762B2 (en) * 2000-10-26 2006-04-25 Kongo Co., Ltd. Power-assisted movable rack
US20050184018A1 (en) * 2000-10-26 2005-08-25 Kongo Co., Ltd. Power-assisted movable rack system
US20050150178A1 (en) * 2003-11-17 2005-07-14 Bothun Richard A. Modular storage units for uniforms and wearable equipment
US20050144858A1 (en) * 2003-11-17 2005-07-07 Bothun Richard A. Modular storage structure for logistical management of operational units
US20050132924A1 (en) * 2003-11-17 2005-06-23 Bothun Richard A. Track system for modular storage
US20060231517A1 (en) * 2003-11-17 2006-10-19 Bothun Richard A Modular storage system for logistical management of operational units
US20070216120A1 (en) * 2003-11-17 2007-09-20 Bothun Richard A All-terrain retail merchandising unit
US7484631B2 (en) 2003-11-17 2009-02-03 Nenger Corporation Modular storage system for logistical management of operational units
US7963533B2 (en) 2003-11-17 2011-06-21 Wenger Corporation All-terrain retail merchandising unit
US20060043813A1 (en) * 2004-08-27 2006-03-02 Delta Electronics, Inc. Stator structures
USD525006S1 (en) 2004-11-17 2006-07-11 Wenger Corporation Modular storage unit
USD530053S1 (en) 2004-11-17 2006-10-10 Wenger Corporation Modular storage unit
US20110266241A1 (en) * 2010-05-03 2011-11-03 Oto Melara S.P.A. System for moving crates for storing objects in a warehouse
US8919576B2 (en) * 2010-05-03 2014-12-30 Oto Melara S.P.A. System for moving crates for storing objects in a warehouse
US10870542B1 (en) * 2019-10-31 2020-12-22 Toyota Motor Engineering & Manufacturing Manually-initiated synchronization apparatuses for connecting independently-driven platforms to conveying platforms for movement therewith

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