CART CONVEYOR ASSEMBLY
20190061785 ยท 2019-02-28
Inventors
Cpc classification
D06F95/00
TEXTILES; PAPER
B61B7/04
PERFORMING OPERATIONS; TRANSPORTING
B61B11/004
PERFORMING OPERATIONS; TRANSPORTING
B65G19/02
PERFORMING OPERATIONS; TRANSPORTING
B65G2812/99
PERFORMING OPERATIONS; TRANSPORTING
International classification
Abstract
A cart assembly system for handling laundry in a facility, the system including first and second support structures each having arms extending outwardly therefrom. The arms support drive wheels, which in turn support a tow line extending between the first and second support structures. The system may include a drop cord extending downwardly from the tow line and engaging a slot on a tow cart to attach the tow cart to the tow line. The system may also include a mast extending from the cart to the tow line, the mast supporting a clamp assembly for coupling the cart to the tow line. A controller drives one or both of drive wheels to move the tow line and the cart along the line pathway, where the cart transports laundry throughout the facility.
Claims
1. A system for automated movement of articles across a facility, the system comprising: a plurality of support structures including a first support structure having a first outwardly extending arm, and a second support structure having a second outwardly extending arm, the first and second support structures spaced apart from one another; a first drive wheel supported on an end of the first arm of the first support structure, and a second drive wheel supported on an end of the second arm second support structure; a tow line coupled to the first and second drive wheels, the tow line extending between the first and second drive wheels and defining a line pathway; a cart; a bracket assembly having a first portion coupled to the cart and a second portion coupled to the tow line; and a controller in operable communication with one or both of the first and second drive wheels, the controller operable to drive the drive wheels to move the tow line and the cart along the line pathway.
2. The system of claim 1, further comprising a drop cord extending downwardly from the tow line, wherein the drop cord is attachable to the cart via a key slot formed on the cart and sized to receive the drop cord.
3. The system of claim 1, wherein the bracket assembly includes a mast coupled to the cart, and a clamp assembly supported by the mast and coupled to the tow line.
4. The system of claim 1, further comprising a guard disposed underneath each of the first and second drive wheels, the guard having at least a portion of an outer perimeter extending beyond a corresponding outer perimeter of the respective first and second drive wheels.
5. The system of claim 1, further comprising: a speed sensor system operable to determine an operating speed of the tow line; and a proximity sensor, wherein the speed sensor system interacts with the proximity sensor to determine the operating speed of the tow line.
6. The system of claim 5, wherein the speed sensor system is in operable communication with the controller, and wherein the speed sensor system sends a signal to the controller to deactivate the drive wheels when the speed sensor system determines that the operating speed of the tow line is outside a predetermined range.
7. The system of claim 1, wherein the cart further includes a button in wireless communication with the controller, wherein the button is actuatable to send a signal to the controller to deactivate the drive wheels.
8. The system of claim 1, further comprising a first hook coupled to the first arm of the first supporting structure, wherein the hook is operable to ensnare the tow line when the tow line dislodges from the first drive wheel.
9. The system of claim 1, further comprising a locking member affixed to the carts, the locking member supporting a receiving tube configured to receive the bracket assembly.
10. The system of claim 1, further comprising an opening extending through a surface of the cart, the opening sized and dimensioned to receive the first portion of the bracket assembly.
11. A method for automated movement of articles across a facility, the method comprising: coupling a first drive wheel to a first arm of a first support structure; coupling a second drive wheel to a second arm of a second support structure; coupling a tow line to the first and second drive wheels, the tow line extending between the first and second drive wheels and defining a line pathway; coupling a first portion of a bracket assembly to a cart; coupling a second portion of the bracket assembly to the tow line; driving, via a controller, one or both of the first and second drive wheels to move the tow line and the cart along the line pathway.
12. The method of claim 11, further comprising a drop cord extending downwardly from the tow line, the method further comprising attaching the drop cord to the cart via a key slot formed on the cart and sized to receive the drop cord.
13. The method of claim 11, wherein the bracket assembly includes a mast coupled to the cart, and a clamp assembly supported by the mast, the clamp assembly further coupled to the tow line.
14. The method of claim 11, further comprising disposing a guard underneath each of the first and second drive wheels, the guard having at least a portion of an outer perimeter extending beyond a corresponding outer perimeter of the respective first and second drive wheels.
15. The method of claim 11, further comprising determining, via a speed sensor system, an operating speed of the tow line, wherein the speed sensor interacts with a proximity sensor to determine the operating speed of the tow line.
16. The method of claim 15, wherein the speed sensor system is in operable communication with the controller, the method further comprising sending, via the speed sensor system, a signal to the controller to deactivate the drive wheels when the speed sensor system determines that the operating speed of the tow line is outside a predetermined range.
17. The method of claim 11, wherein the cart further includes a button in wireless communication with the controller, wherein the button is actuatable to send a signal to the controller to deactivate the drive wheels.
18. The method of claim 11, further comprising a first hook coupled to the first arm of the first supporting structure, wherein the hook is operable to ensnare the tow line when the tow line dislodges from the first drive wheel.
19. The method of claim 11, further comprising affixing a locking member to the carts, the locking member including a receiving tube configured to receive the bracket assembly.
20. The method of claim 11, further comprising an opening extending through a surface of the cart, the opening sized and dimensioned to receive the first portion of the bracket assembly.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0006]
[0007]
[0008]
[0009]
[0010]
[0011]
[0012]
DETAILED DESCRIPTION OF EXAMPLE EMBODIMENTS
[0013] With reference to the drawings, this section describes particular embodiments of an automated cart conveyor assembly and its detailed construction and operation. Throughout the specification, reference to one embodiment, an embodiment, or some embodiments means that a particular described feature, structure, or characteristic may be included in at least one embodiment of the automated cart conveyor assembly. Thus appearances of the phrases in one embodiment, in an embodiment, or in some embodiments in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the described features, structures, and characteristics may be combined in any suitable manner in one or more embodiments. In view of the disclosure herein, those skilled in the art will recognize that the various embodiments can be practiced without one or more of the specific details or with other methods, components, materials, or the like.
[0014] In the following description, particular components of the automated cart conveyor assembly may be described in detail. It should be understood that in some instances, well-known structures, materials, or operations are not shown and/or not described in detail to avoid obscuring more pertinent aspects of the embodiments. In addition, although the embodiments may illustrate and reference particular designs, other embodiments may include additional or fewer components than the described embodiments. Finally, it should be understood that although the embodiments herein are described with reference to use in laundry processing facilities, the disclosed subject matter may be adapted for use in other suitable environments as well.
[0015] With general reference to the figures, the following disclosure relates an automated cart conveyor assembly 100 including an overhead line or cable system 102 having a tow line or tow cable 104 (hereinafter referred to as a tow cable with the understanding that the term cable is not intended to be limiting) and multiple drive pulleys or wheels 106 (hereinafter referred to as a drive wheel) arranged to define a track for transporting one or more laundry carts 108 across a laundry facility. As is further described in detail below, the automated cart conveyor assembly 100 allows workers to attach loaded laundry carts 108 to the overhead cable system 102 to transport laundry via the cable system 102 to various processing stations of the laundry facilities, such as a sorting area, a washing/drying area, an assembly line area to create specific customer orders and a folding area for example, to reduce worker involvement in transporting laundry loads and maximize overall efficiency. Additional details relating to the automated cart conveyor assembly 100 are further described in detail below with particular reference to
[0016]
[0017]
[0018] As described above, the drive wheels 106 support a tow cable 104 and together form the cable pathway for the cable system 102. For improved traction and to create proper tension, the drive wheels 106 may include a spring loaded cable tensioner (not shown). The tow cable 104 may be of any suitable material capable of supporting the weight of the attached carts 108, while minimizing sagging to prevent the tow cable 104 from disengaging the drive wheels 106 and having sufficient wear resistant properties to maximize longevity. For example, in some embodiments, the tow cable 104 may be a stainless steel cable ranging in diameter from 1/16 inch to inch. In other embodiments, the tow cable 104 may instead be a hollow braid polypropylene rope ranging in diameter from inch to inch. Preferably, the tow cable 104 is made from a material with sufficient strength properties to support a normal operating tension of at least 200-lbs and a surge load at start of at least 350-lbs. For example, in one embodiment, the tow cable 104 may be a stainless steel cable having an approximately -inch diameter.
[0019] It should be understood that in other embodiments, the tow cable 104 may be made of other suitable materials depending on the transport load and surge load that the automated cart conveyor assembly 100 will handle during normal operation. In addition, it should be understood that the term tow cable is used for convenience purposes only and is not meant to limit the tow cable only to actual cables. Other lines, braided ropes, or other suitable components may be used without departing from the principles of the described subject matter.
[0020] In some embodiments, the wheels 106 may each include a guard 110 positioned underneath the wheels 106 to minimize exposure of the wheels 106 and help prevent accidental injury. For example, in one embodiment, the guard 110 may be a circular disc attached to the wheel shaft supporting the wheels 106, where the guard 110 extends beyond the edges of the respective wheels 106 such that the guard 110 acts as a barrier to protect the workers from injury. Preferably, the guard 110 is non-rotatably attached to the wheel shaft such that the guard 110 is fixed in position as the wheels 106 rotate. In some embodiments, the guard 110 may also function as a trap to catch the tow cable 104 in the event the tow cable 104 breaks or otherwise dislodges from the wheels 106. It should be understood that in other embodiments, the guard 110 may extend under the entirety of the tow cable 104 (with appropriate gaps or spacing to accommodate coupling and transport of the carts 108 via the tow cable 104) to further minimize risk of injury and to trap the tow cable 104 in the event of a rupture or dislodging.
[0021] In other embodiments, the guard may have a different configuration than the round, disc shape of guard 110. For example,
[0022] The guard 210 (and the guard 110) may each be formed from any suitable material. For example, in one embodiment, the guards 110, 210 may be formed from a 3/16-inch clear polycarbonate material. In other embodiments, other suitable materials may be used. Preferably, all edges of the guard 210 are smooth to minimize potential cuts or other injury in the event a worker contacts the guard 210. It should be understood that in other embodiments, the cart assembly system 100 may include a guard with other suitable configurations different than the illustrated embodiments.
[0023] During use, a worker processes the laundry and loads it onto the carts 108 when the laundry is ready for transportation. In some embodiments, the motor 112 may operate the cars at a sufficiently slow speed to allow workers to load the carts 108 without risk of injury. For example, in some embodiments, the carts 108 may be moved at a speed of approximately 2-3 feet per minute. In other embodiments, the movement speed of the cart may range between 1-5 feet per minute, or between 6-8 feet per minute, or at any other suitable speed as desired. Preferably, the carts 108 move slowly enough to minimize potential hazards and injury to the workers in the laundry facility, while also ensuring that the tow cable 104 is not pulled downwardly and/or away from the pulleys/drive wheels 106. In some embodiments, warning devices (e.g., alarms) and/or fencing/barricades may be used to provide additional safety barriers between the workers and the carts 108 being towed to avoid potential injuries. The following description provides additional details of various components of the cable system 102.
[0024] With reference to
[0025] The stanchions 114 and drive wheels 106 may be arranged in any one of a variety of suitable orientations. With reference to
[0026] In some embodiments, the arms 116 may include one or more hooks (not shown) extending downwardly therefrom and wrapping under the drive wheels 106 inside the path of the tow cable 104 to ensnare or catch the tow cable if it were to rupture or otherwise become dislodged from the drive wheels 106. For example, in one embodiment, a hook (which may be made of -inch stainless steel or other suitable material) may extend downwardly from each arm 116, where the hook includes a first vertical section of approximately 10 inches, and a bend of approximately 90 degrees toward the shaft of the drive wheels 106 to serve as a safety hook for the tow cable. In other embodiments, the hook may further be used to fix the guard 210 in position and help prevent its rotation relative to the drive wheels 106 as noted previously. For example, in such embodiments, the hook may include a first vertical section of approximately 10 inches, and then a first bend of approximately 90 degrees horizontal to the point of going through the opening 220 of the shield 210 with another 90 degree bend. The hook then bends back 90 degrees toward the shaft of the drive wheels 106 to serve as a safety hook for the cable.
[0027] One of the stanchions 114 (or a separate stanchion, not shown) may support a control box 150 operable to control operation of the drive wheels 106 (and control other components) of the automated cart conveyor assembly system 100. In some embodiments, the automated cart conveyor assembly system 100 may further include a bracket sensor (not shown) in communication with the control box 150, where the bracket sensor may signal the control box 150 to power off the automated cart conveyor assembly system 100 when the sensor detects that the bracket 134 attaching the cart 108 to the two cable 104 was not removed from the tow cable 104 at an appropriate time. Further details relating to bracket 134 are discussed below with reference to
[0028] In some embodiments, the automated cart conveyor assembly system 100 may further include a speed sensor system 152 operable to detect the speed of the tow cable 104. The speed sensor system 152 interacts with a proximity sensor (not shown) to detect an abnormal line speed of the tow cable 104 outside expected parameters, which may indicate that the tow cable 104 may have become dislodged from the drive wheels 106, or the traction between the tow cable 104 and drive wheels 106 has been lost. When the speed sensor system 152 determines that the tow cable 104 is moving at abnormal speeds, the speed sensor system 152 communicates with the control box 150 to shut off the automated cart conveyor assembly system 100 and prevent potential injury or damage to the system.
[0029] In some embodiments, the tow cable 104 may include a plurality of drop cords 118 attached thereto and spaced apart from one another at intervals along the tow cable 104. The drop cords 118 incorporate a key 120 formed on or attached to an end of the drop cord 118. As further explained in detail below with particular reference to
[0030]
[0031] In some embodiments, the carts 108 may each further include an emergency shut off button 154 in wireless communication with the control box 150. The button 154 may be used to send a signal to the control box 150 to immediately power off the automated cart conveyor assembly system 100 when desired. For example, if the workers 10 determine that the tow cable 104 has become dislodged or is about to rupture, or if the workers identify other potentially problematic conditions, the workers 10 can activate the button 154 on any one of the carts 108 to remotely shut down the automated cart conveyor assembly system 100. Once the issue has been resolved, the automated cart conveyor assembly system 100 may be operated once again via the control box 150, or via the button 154.
[0032] In some embodiments, the automated cart conveyor assembly system 100 may further include a rigid attachment bracket 134 to help suspend and support the cable 102 when the cart is attached 108 thereto, and to help prevent the cable 102 disengaging from the drive wheels 106. With particular reference to
[0033] The clamp assembly 138 includes a first leg 166 and a second leg 168 and may have a similar appearance to a set of pliers. As illustrated in
[0034] The bracket 134 may be coupled to the cart 108 along the end opposite the clamp assembly 138 in any one of a variety of suitable means. For example, in one embodiment, the cart 108 may have a slot or opening 146 extending through a top surface 148 of the cart 108 (see
[0035] In other embodiments, the bracket 134 may be mechanically fastened to the cart 108 by inserting suitable fasteners (e.g., threaded screws, nuts and bolts, etc.) through the plate 184 to affix the bracket 134 to the cart 108. In still other embodiments, the bracket 134 may be an integral component of the cart 108 or may be coupled to the cart 108 in other suitable methods.
[0036]
[0037] With particular reference to
[0038] The bracket 134 is then connected to the tow cable 104 and the cart 108 via the clamp assembly 138. Once the cart 108 is secured, it is transported along the cable pathway until it reaches its desired location, at which point the cart 108 may be removed from the tow cable 104 by disengaging the clamp assembly 138 and releasing the drop cord 118 from the key slot 120. In some embodiments, the carts 108 may be transported over a scale 140 to obtain a weight measurement of the items (e.g., laundry) loaded in the carts 108 prior to removing the cart from the tow cable 104. In some embodiments, after unloaded the carts 108, the empty carts 108 may be connected back to the tow cable 104 to return the carts 108 to the working area 142 to be refilled as needed.
[0039] It should be understood that while the figures illustrate various example designs for an improved cart assembly system 100, other configurations may be possible without departing from the principles of the disclosed subject matter. In addition, although the description above contains much specificity, these details should not be construed as limiting the scope of the invention, but as merely providing illustrations of some embodiments of the invention. It should be understood that subject matter disclosed in one portion herein can be combined with the subject matter of one or more of other portions herein as long as such combinations are not mutually exclusive or inoperable.
[0040] The terms and descriptions used above are set forth by way of illustration only and are not meant as limitations. It will be obvious to those having skill in the art that many changes may be made to the details of the above-described embodiments without departing from the underlying principles of the invention.