WO2012088226A1 - Dispositif et procédé de manipulation de pneus - Google Patents

Dispositif et procédé de manipulation de pneus Download PDF

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Publication number
WO2012088226A1
WO2012088226A1 PCT/US2011/066387 US2011066387W WO2012088226A1 WO 2012088226 A1 WO2012088226 A1 WO 2012088226A1 US 2011066387 W US2011066387 W US 2011066387W WO 2012088226 A1 WO2012088226 A1 WO 2012088226A1
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WO
WIPO (PCT)
Prior art keywords
tire
conveyor
auxiliary
testing
conveyors
Prior art date
Application number
PCT/US2011/066387
Other languages
English (en)
Inventor
Michael D. WARHOLIC
Barry D. Cargould
Jack L. Perecman
Original Assignee
Micro-Poise Measurement Systems, Llc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Micro-Poise Measurement Systems, Llc filed Critical Micro-Poise Measurement Systems, Llc
Publication of WO2012088226A1 publication Critical patent/WO2012088226A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B65G15/10—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration comprising two or more co-operating endless surfaces with parallel longitudinal axes, or a multiplicity of parallel elements, e.g. ropes defining an endless surface
    • B65G15/12—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration comprising two or more co-operating endless surfaces with parallel longitudinal axes, or a multiplicity of parallel elements, e.g. ropes defining an endless surface with two or more endless belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G21/00—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors
    • B65G21/10—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors movable, or having interchangeable or relatively movable parts; Devices for moving framework or parts thereof
    • B65G21/14—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors movable, or having interchangeable or relatively movable parts; Devices for moving framework or parts thereof to allow adjustment of length or configuration of load-carrier or traction element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/0016—Handling tyres or parts thereof, e.g. supplying, storing, conveying
    • B29D2030/0027—Handling cured tyres, e.g. transferring or storing after vulcanizing

Definitions

  • the present invention relates generally to conveyors for transporting articles and, in particular, to an inlet conveyor for transporting tires to and from a tire uniformity testing system.
  • dimensional irregularities can arise from inaccuracies in the molding process, changes in the characteristics of the materials and compounds employed in manufacturing the tires, inaccurate centering and variations in the vulcanization process, etc.
  • AH of the possible irregularities and variations in the tires which can arise during manufacture either singularly or through interaction with one another, can cause eccentricity, static and dynamic unbalance in the tire, and force variation which can result in tire vibration or noise during use.
  • the data taken during the testing process may be used to mark specific regions of the tire to alert the buyer/installer to an area of interest, such as an irregularity or point of high force in the tire, which will enable the installer to take corrective or compensating action during installation of the tire onto a wheel .
  • the present invention provides an improved tire conveying apparatus and method for transporting a tire through a tire testing apparatus such as a tire uniformity testing system or through a balancing machine/system for checking the dynamic balance of tires.
  • the invention provides a tire conveying apparatus and method for transporting a tire to a tire testing station and for transporting the tire from the testing station to a remote position.
  • the conveying apparatus transports a tire from a centering station to a test station and, after the tire is tested, the apparatus conveys the tire from the test station to a discharge end of the conveyor system.
  • the apparatus is especially adapted to handle "low profile" tires, i.e., tires having a very narrow sidewall.
  • the tire conveying apparatus includes a first conveyor including a pair of spaced-apart conveying members, each member defining a tire support surface that is engageable with the tire to be transported.
  • the first conveyor includes a drive member, such as a servomotor, for driving the conveying members in order to move a tire to a test station position.
  • An auxiliary conveyor is provided that includes a pair of spaced-apart auxiliary conveying members, which are also engageable with the tire to be tested.
  • the auxiliary conveyors include retractable inner portions that are operative to move a portion of the auxiliary conveying members to a position spaced from the testing position whereby clearance for a tire testing rim forming part of the testing station is provided so that the tire testing rim can pass through a plane defined by the auxiliary conveying members in order to engage a tire to be tested.
  • the first and auxiliary conveying members comprise continuous conveyor belts.
  • the auxiliary conveyor comprises an auxiliary rail assembly that includes relatively movable first and second portions, whereby an inner end portion of the auxiliary conveyor belt is moved to a position spaced from the test station position under predetermined operating conditions.
  • a pneumatic actuator is provided to extend and retract the inner end portion of the auxiliary conveyor belt.
  • the first conveyor includes drive rollers/pulleys for driving the associated conveyor belts and the drive pulleys are operatively coupled to auxiliary drive pulleys forming part of the auxiliary conveyor, such that movement imparted to the first conveyor belts is coupled to the auxiliary conveyor belts. Movement in the first conveyor belts produces concurrent movement in the auxiliary conveyor belts.
  • the auxiliary frame rail assembly includes a first portion having fixed first and second belt roller/pulleys and a second portion having a pair of fixed rollers.
  • the associated auxiliary belt is reeved around the rollers of the first and second rail portions in a serpentine fashion, such that relative movement between the first and second portions changes the position of an end portion of the auxiliary conveyor without changing the length of the path of the auxiliary conveyor belt.
  • At least one of the rail portions of the auxiliary conveyor includes an adjuster for adjusting the tension of the auxiliary belt.
  • the movable portion of the auxiliary frame rail assembly is reciprocally moved by a pneumatic actuator, one end of which is coupled to the movable portion auxiliary/conveyor and the other end of which his attached to a support member forming part of the first conveyor.
  • the one auxiliary conveyor is located upstream from the test station and is used to transport the tire to be tested from a remote or delivery position such as a centering station to the tire testing position and another downstream auxiliary conveyor is used to transport the tire from the tire test position to a discharge position such as a sorting or storing station-
  • a test rim forming part of the testing station includes a multi-stepped diameter for engaging tires to be tested having different inside diameters.
  • the auxiliary conveyors further include pawl members for supporting a tire at the test station position as a tire is being engaged by the testing rim. The pawl members are coupled to the auxiliary conveyor such that movement of the auxiliary conveyor end portions towards and away from the test station position produces concurrent movement in the pawl members.
  • Each pawl member is movable between first and second positions, with the first position being a tire supporting position and the second position being a retracted position which provides clearance for a tire testing rim in order to allow the tire testing rim to engage a tire.
  • the pawl member includes an over-center mechanism which is operative to maintain the pawl member in either its first or its second position.
  • the present invention provides a preferred method for transporting a tire from a remote position to a tire test position, at which the tire to be tested is aligned with an axis of a rotatable tire testing rim.
  • the method includes the steps of providing a first conveyor that includes a pair of spaced apart conveyor belts engageabie with the tire to be tested.
  • An auxiliary conveyor is also provided that includes a pair of spaced apart auxiliary conveyor belts that are positioned to the inside of the first conveyor belts, such that the spacing between the auxiliary conveyor belts is less than the spacing between the first conveyor belts.
  • the method includes the further step of concurrently advancing the first and auxiliary conveyor belts in order to move the tire to be tested from the remote position to a test position.
  • auxiliary conveyor When the tire reaches the test position, inner end portions of the auxiliary conveyor are retracted to a position spaced from the test position.
  • the auxiliary conveyor, and preferably the first conveyors, are lowered to allow the test rim to pass between the first conveyor and the auxiliary conveyor, in order to engage a tire that is at least partially supported by the auxiliary conveyor.
  • the auxiliary conveyor is raised and the inner end portions of the auxiliary conveyor are extended towards the axis or centerline of the test station in order to engage the tire.
  • the auxiliary conveyor belt is then advanced in order to move the tire from the test position to an exit position.
  • the present invention provides a conveyor system that is capable of transporting a wide variety of tires from a remote location to a test position and from a test position to a discharge position.
  • the disclosed conveyor apparatus is specifically adapted, to handle "low profile" tires and utilizes the auxiliary conveyors to support tires having very narrow sidewalls.
  • the auxiliary conveyors are further adapted to provide clearance for the test rim by retracting inner end portions of the auxiliary conveyor.
  • the conveyor apparatus includes a first conveyor and an auxiliary conveyor.
  • the illustrated first conveyor includes a continuous conveyor belt that extends from a receiving end of the conveyor, past the tire test station and continues to a discharge end of the conveyor apparatus.
  • the auxiliary conveyor includes a first upstream section that extends from the receiving end of the conveying apparatus and terminates at the tire test station and is movable towards and away from a center line or axis of the tire testing rim.
  • the auxiliary conveyor includes a second downstream, section that extends from the test station to a discharge end of the conveyor.
  • the auxiliary conveyors includes end.
  • the present invention also contemplates a first conveyor that also has multiple sections rather than having a continuous belt path that extends from the receiving end of the conveyor apparatus to the discharge end of the conveyor apparatus.
  • the present invention also contemplates a conveyor apparatus that only includes the "auxiliary" conveyor and does not include the outboard, adjacent conveyor belts of the illustrated "first" conveyor. It is contemplated that for this contemplated tire testing application, a single conveyor apparatus having two sections with retractable end portions would be used to convey a tire from a receiving end to a discharge end of the overall conveyor apparatus. This configuration may be used for an application in which only tires having a narrow sidewall, i.e., "low profile” tires are being tested, so there is no need for the outboard "first” conveyor.
  • Fig. 1 is a is a plan view of a tire testing system including an inlet conveyor constructed according to a preferred embodiment of the present invention
  • Fig. 2 is a front elevation view of the tire testing system of Fig. 1 ;
  • Fig. 3 is a plan view of a centering station forming part of the tire testing system of Fig. ] ;
  • Fig. 4 is a plan view of a centering mechanism forming part of the centering station of Fig. 3;
  • Fig. 5 is a fragmentary end elevation view of the tire testing system of Fig. 1 showing the centering mechanism and inlet conveyor;
  • Fig. 6 is a front elevation view of the tire testing system of Fig. 1 showing the inlet conveyor;
  • Fig. 7 is a fragmentary end elevation view of the centering station taken along lines 7—7 in Fig. 3;
  • Fig. 8 is a fragmentary end elevation view of the centering station taken along lines 8—8 in Fig. 3;
  • Fig. 9 is a fragmentary end elevation view of a tire lubrication device forming part of the tire testing system of Fig. 1 ;
  • Fig. 10 is a fragmentary front elevation view of the tire lubrication device taken along lines 10—10 in Fig. 9;
  • Fig. 1 ! is a fragmentary front elevation view of the tire lubrication device of Fig. 9 showing the device lubricating a tire;
  • Fig. 12 is a plan view of the tire lubrication device of Fig. 9;
  • Figs. 13A and 13B are perspective and plan views, respectfully, of a conveyor assembly constructed in accordance with one preferred embodiment of the invention.
  • Fig. 14 is a perspective, schematic representation of a tire handling conveyor constructed in accordance with one preferred embodiment of the invention.
  • Figs. 1 5 is a plan view showing a retracted position, of a tire handling conveyor constructed in accordance with the one preferred embodiment of the invention
  • Figs. 16A, 16B and 16C illustrate a perspective view and side elevational views of retracted and extended positions of an auxiliary conveyor constructed in accordance with the one embodiment of the invention
  • Figs. 17A, 17B and 17C illustrate end and perspective views of a conveyor support forming part of the conveyors that are constructed in accordance with one embodiment of the invention
  • Figs. 1 8A and 1 8B are side elevational views of a conveyor and auxiliary tire support constructed in accordance with another embodiment of the invention
  • Fig. 19 is a fragmentary top elevational view of a conveyor assembly that includes auxiliary conveyors and tire support pawl assemblies constructed in accordance with another embodiment of the invention:
  • Fig. 20 is a perspective view of a pawl assembly constructed in accordance with another embodiment of the invention.
  • Fig. 21 is a fragmentary schematic representation of a tire holding rim and associated tires in relation to an auxiliary conveyor belt constructed in accordance with an embodiment of the invention.
  • Figs. 22A and 22B illustrates two extreme positions of a toggle forming part of the tire support pawl assembly constructed in accordance with an embodiment of the invention.
  • Fig. 1 illustrates, in plan view, the overall arrangement of a tire testing system, which includes an inlet conveyor (see also Fig.2).
  • An inlet conveyor to be described and constructed according to a preferred embodiment of the invention is an
  • the overall tire testing system comprises the following major subsystems: an inlet conveyor 1.0, a testing station 12, and an exit module 14 including an optional marking station 14a and tire sorting mechanism 14b.
  • a tire positioned at the testing station 12 is tested and optionally ground to adjust the roundness, mechanical uniformity and/or any other physical properties of the tire.
  • a tire indicated by reference character 20 (shown in phantom) has been delivered to the testing station by the inlet conveyor 10 so that the tire is clamped between lower and upper rims of an automat ic adjustable width chuck apparatus (shown in phantom in FIG. 2).
  • the rims are carried, respectively, by a spindle assembly 30 and a movable chuck assembly 32 comprising the chuck apparatus.
  • the adjustable width chuck apparatus is more fully disclosed in application Ser. No. 08/988, 1 19, Filed Dec. 10,
  • the tire 20 is clamped between the rims and inflated via the spindle assembly 30.
  • a loadwheel assembly 40 including a loadwheel 42 is moved into abutting relationship with the outer surface of the tire 20.
  • the tire is rotated, against the loadwheel which monitors the load exerted by the tire via load cells.
  • load cells As is known in the art, data taken from the load cells is used to determine the uniformity of the tire.
  • adjustments to the uniformity of the tire are made by one or more grinders, indicated generally by reference character 52, for grinding the lower and upper (i.e., shoulder) and center tread portions of the tire.
  • the loadwheel assembly is more fully disciosed in application Ser. No. 08/988,509, filed Dec. 10, 1997 (now patent No. 5,979,231 ), and entitled LOADWHEEL ASSEMBLY FOR TIRE TESTING SYSTEMS, the subject matter of which is hereby incorporated by reference.
  • a probe system may form part of the testing station and includes upper and lower sidewall sensor assemblies, upper and lower shoulder sensors, and a center tread sensor (not shown).
  • the probe system is more fully disclosed in the aforementioned patent relating to the overall tire testing system.
  • the spindle assembly 30, chuck assembly 32, loadwheel assembly 40, grinders 52 and probe system 56 are mounted to a gantry-like frame system indicated generally by the reference character 60 in Figs. 2 and 6.
  • the frame 60 is constructed as described in the aforementioned co-pending application relating to the overall tire testing system.
  • the prior art conveyor and an improved inlet conveyor of the invention are described in connection with its preferred and illustrated application, namely, conveying tires to a tire uniformity testing station such as that indicated by reference character 12.
  • a tire uniformity testing station such as that indicated by reference character 12.
  • the inlet conveyors disclosed herein are suitable for use in conveying articles, preferably tires, to or from apparatus other than a uniformity testing machine, e.g., apparatus which measure other characteristics of a tire and/or perform a process relating to the manufacture or production of tires. Accordingly, it should be appreciated that the description herein of the conveyor 10 only relates to one possible application of the invention.
  • the inlet conveyor may be viewed as comprising three main components: a frame indicated generally by the reference character 100, a tire conveyor indicated generally by the reference character 200, and. a tire centering mechanism located at a centering station and indicated generally by the reference character 300.
  • the centering mechanism 300 centers a tire about an axis 54 that is located a predetermined distance from the rotational axis 56 of the testing station 12.
  • the tire conveyor 200 and centering mechanism 300 are secured to the frame 100.
  • frame 100 comprises vertical posts 102 and horizontal beams 104 attached to and extending between posts 102.
  • Support feet
  • the frame unit is of generally rectangular shape with four posts 102 disposed at the four corners and a plurality of horizontal beams 104 extending between upper and lower portions of the posts. Sidewall plates 122 may be provided between the posts 102 to add further rigidity to the frame. It will be recognized that the number and specific orientation of posts 102 and beams 104 may be varied from that shown in the drawings.
  • the opposite sides of the frame 100 i.e., above and below the frame as viewed in Fig. 1
  • the operator side is designed to provide easier access to the machine components and, in Fig. i , is located on the same side as grinders 52 and probe system 56.
  • the frame J 00 is provided with means for moving the tire conveyor 200 in a vertical direction relative to the frame.
  • the means for raising and lowering the conveyor comprises a pneumatic cylinder 1 10 including a rod 1 1.2 with a clevis 1 14 connected to a conveyor elevator 250 via a bracket 120, the butt end 1 16 of the cylinder being attached to a hinge bracket 1 18 fixed to frame 100 (Fig. 5).
  • tire conveyor 200 is raised or lowered with respect to frame 100.
  • a pneumatic cylinder is preferred, other devices may be used to move the tire conveyor, e.g., a motor driven chain and sprocket assembly, a rotatable ball or lead screw assembly, etc.
  • a conveyor 150 is secured to frame 100 preferably at a fixed position to accept and support tires delivered from a kick roller 130.
  • the kick roller 130 serves to separate a tire to be tested from a supply of tires located on a feed conveyor (not shown), the tire being kicked onto the conveyor 1 50 upon contacting the rotating roller 130.
  • the conveyor 150 preferably is an "omni-roU" type conveyor comprising a plurality of rollers 152 that perm it tires to move longitudinally (i.e., in the direction of flow through the machine) and laterally, this movement taking place during centering of the tire upon actuation of centering mechanism 300.
  • Conveyor 150 includes two trays 154 that support two groups of rollers 152, the trays 154 being fixed to a support 156 which in turn is fixed to struts 158 mounted to frame plate 122 (Fig. 5). In the preferred embodiment the conveyor 150 thus is fixed in a desired vertical position relative to frame 100.
  • tire conveyor 200 preferably comprises a pair of longitudinally extending conveyor belts 202 laterally spaced from each other to define a gap 204 therebetween.
  • the belts 202 are supported by a pair of rails 210 extending substantially the entire length of the belts.
  • the rails 210 have ends 216 secured to the conveyor elevator 250 adjacent the centering station (and frame 100) and opposite ends 212 extending away in a cantilever manner. While two belts 202 are preferred, it should be noted that more or less belts could be used.
  • the preferred construction forms a space between the belts that allows the spindle assembly 30 of the testing station to pass therethrough upon lowering of the conveyor, the conveyor extending from the centering station to the testing station as shown.
  • the elevator 250 includes an elevator plate 252 (Figs. 3 and 5) supporting a pair of elevator forks 254 each of which is strengthened by a gusset 256.
  • a pair of guides 258 is fixed to elevator plate 250 and slidabiy engages complimentary guides 106 carried by (or formed integrally with) the frame posts 102 disposed on the elevator side of the machine. Actuation of cylinder 1 10 extends or retracts rod 1 12 to raise or lower elevator 250 with respect to frame 100, the cooperating guides 106, 258 facilitating smooth relative movement of the components. See Fig. 3.
  • the conveyor support rails 210 are provided with pulleys around which the belts 202 are reeved.
  • the cantilevered ends 212 of the rails 230 are attached to idler support brackets 214 which mount idler pulleys 220 (Fig. 6).
  • the opposite ends 216 of rails 210 are attached to conveyor support brackets 21 8 which are secured to a drive shaft 240 (Fig. 3).
  • a pair of drive pulleys 230 are also mounted to the drive shaft 240, for example a splined or keyed shaft, and transmit torque to the pulleys and belts passing therearound, the shaft 240 being rotatab!y supported by brackets 242 fixed to the elevator fork 254 disposed adjacent kick roller 130.
  • the conveyor support brackets 218 are mounted to the drive shaft 240 by bearings that permit the rails 210 to be pivoted about the drive shaft. This feature allows the conveyor to be pivoted up and away from the testing station for maintenance, repair, etc.
  • the end of shaft 240 adjacent the elevator side of the machine carries a timing pulley 274 that is rotated by a timing belt 278.
  • the timing belt 278 is driven by a timing pulley 272 connected to the output of suitable drive means 276 carried by the elevator 250.
  • the pulleys 272, 274, timing belt 278, and drive means 276 comprise a conveyor drive mechanism indicated by reference character 270 in Fig. 3.
  • drive means 276 is a rotary pneumatic actuator including a rack that is linearly driven by a pinion.
  • This type of actuator provides precise control in moving belts 202. After conveying a tire to the testing station 12, the actuator must be reversed to return the belts to their beginning position to convey the next tire from the centering station to the testing station.
  • An actuator that may be used to drive the belts 202 for example, is a Parkhann 350 deg. rotary pneumatic actuator (model PTR 252-350-4-FPAB21 M). Precise control of the belt drive is desirable so that tires are properly positioned at the rotational axis of the testing station and/or the exit station 14.
  • An encoder (not shown) preferably is provided to detect belt travel and permit movement of the inlet conveyor to be synchronized with movement of an exit conveyor.
  • the invention contemplates other types of drive components for the drive means
  • the belts may also be precisely driven by an electric motor, under the control of a suitable control system that includes an encoder for monitoring the movement of the belts.
  • the tire conveyor 200 is provided with a mechanism, indicated generally by the reference character 280 and shown best in Figs. 3, 7 and 8, for adjusting the lateral position of conveyor belts 202 in order to support tires having different diameters.
  • the conveyor support rails 210 inward of their ends that are secured to conveyor brackets 218 mounted on the drive shaft 240, are mounted to a support rail shaft 208.
  • Support rail shaft 208 is fixed to a support member 209 that is attached to the forward elevator fork 254 (i.e., the fork located to the left in Fig. 3).
  • the attachment of the shaft 208 to member 209, as well as member 209 to fork 254, may be achieved by any suitable means, e.g. welding, threaded fasteners, etc.
  • the support rails 210 are provided with mounting pads 298 secured to the vertical legs of L-shaped width adjustment brackets 206 (Fig. 7).
  • the horizontal legs of the brackets 206 are fixed to the upper portion of linear bearing members 207 slidably secured to rail support shaft 208.
  • sliding bearing members 207 toward or away from each other moves rails 210 toward or away from each other thereby adjusting the width between conveyor belts 202.
  • the width adjustment mechanism 280 includes a screw 282 to facilitate adjustment of the lateral position of the rails 210.
  • the screw 282 preferably is formed with a central unthreaded section disposed between two oppositely threaded sections 284, 286.
  • the screw 282 is fixed at its opposite ends to the elevator fork 254 by support members 288 which, for example, are weided or fastened to the fork.
  • the support members 288 are secured to the screw 282 so as to permit rotation of the screw upon actuation of suitable means for turning the screw, such as crank 290.
  • the screw may be provided with nuts or other locking members that engage supports 288 to laterally fix the screw relative thereto.
  • the support rails 210 are mounted to the screw 282 such that rotation of the screw moves the rails 21.0 toward or away from each other.
  • the rail mounting pads 298 have fixed thereto a pair of yoke members 292.
  • the yoke members 292 are attached to (or formed integrally with) threaded nut portions 294, 296 engaged with adjustment screw 282 (Fig. 8).
  • the yoke disposed adjacent the elevator side of the machine has a right-hand threaded nut portion 296 engaging right-hand threaded screw section 286, while the yoke disposed adjacent the operator side of the machine has a left-hand threaded nut portion 294 engaging left-hand threaded screw section 284.
  • the yokes 292 move toward or away from each other with the rails secured thereto also moving toward or away from each other.
  • conveyor support rails 210 are supported by both drive shaft 240 and support shaft 208 during use and when adjusting the conveyor belt width.
  • the drive shaft 240 preferably is provided with inner and outer pairs of bellows which cover the shaft in the various positions of the support rails. It should be appreciated that aJternative structure may be used to facilitate lateral, adjustment of the conveyor belt rails.
  • the screw 282 could be omitted with the bearing members 207 slidable along shaft 208
  • the belts 202 support a tire during its travel into and out of the testing station 12.
  • the conveyor 200 lowers the tire to be tested onto a lower rim which ultimately engages the inside diameter of the tire to be tested.
  • the inlet conveyor configuration shown in Figs. 1 -12 is capable of handling many, if not most, of the tires in use today.
  • "low-profile” tires are becoming more prevalent and require special handling.
  • "Low-profile” tires have a veiy small sidewall (radial sidewal!) and, therefore, have very little surface that can be contacted by the existing conveyor belts 202. This problem becomes even more acute when multi-step testing rims are employed and the tire that is being tested is being held by the innermost step.
  • the sidewall of the tire may not extend a sufficient distance beyond the periphery of the largest diameter step of the rim and, therefore, cannot be properly engaged by the existing conveyor belts 202 because moving the conveyor belts inwardly to accommodate the smaller overall diameter of the low-profile tire would result in interference between the conveyor belts 202 and the lower test rim when the tire is being lowered onto or lifted from the rim.
  • Figs. 1 3A and 13B illustrate an improved conveyor 200', which can handle low- profile tires including those being tested with multi-stepped tire testing rims.
  • the improved conveyor 200' includes the belts 202' and rails
  • Figs. 13 - 22B which have the same or corresponding components in Figs. 1 -12, will be marked with a like reference character followed by an apostrophe.
  • the lower rim 24' is a multi-step rim having three distinct steps 24a, 24b, 24c to accommodate tires having three different inner diameters.
  • the existing conveyor belts 202' are spaced apart a predetermined distance and define a gap 204' to allow the conveyor belts 202' to move past the rim 24' when the conveyor is lowering a tire onto the rim. If a low-profile tire 20' is to be tested, it can be seen that the existing conveyor belts 202' cannot reliably support the tire 20' as compared to a standard profile tire (shown in phantom).
  • auxiliary conveyors 800, 801 are employed to support the tire during transport and during the mounting on, and dismounting of the tire from the lower rim.
  • inner portions of the auxiliary conveyors 800, 801 are laterally movable from retracted positions to extended positions.
  • Figs. 13A and 13B illustrate the auxiliary conveyors 800, 801 in their extended or "in” positions.
  • the auxiliary conveyors 800, 801 are extended to the positions shown in Fig. 13 A in order to support and convey the tire to its test position at which it is aligned with the lower rim 24'.
  • the auxiliary conveyors 800, 801 are then retracted so that their inner ends clear the lower rim 24' and the overall conveyor assembly 200' is lowered in order to lower the tire 20' onto the rim 24'.
  • the auxiliary conveyors 800, 801 are again extended in order to support the tire 20' so it can be lifted off the rim 24' when the conveyor assembly 200' is raised.
  • the auxiliary conveyors 800, 801 continue to support the tire 20' as the conveyor assembly 200' transports the tire to an exit location.
  • the belts 202* of the existing conveyor 200' and belts 802, 801 a of the auxiliary conveyors 800, 801 , respectively, are driven by common drive shaft 806 (shown schematically in Fig. 13B) which also drives or movably supports the belts 202' of the existing conveyors 200' .
  • the drive shaft 806 is preferably coupled to and driven by a servomotor. It may also be driven by other means, such as a rotary pneumatic actuator.
  • the conveyors 801 includes drive pulleys 910 which drivingiy engage the associated conveyor belts 801a and which are driven by the common drive shaft 806 (Fig. 1 3B). As indicated above, the drive shaft 806 also drives the outer conveyor belt 202' via associated drive pulleys 202a (see Fig. 13A), which are also co-driven by the drive shaft 806.
  • the belts 802 of the conveyors 800 are also driven indirectly by the drive shaft
  • the conveyors 800 include drive pulleys 810 which drivingiy engage the conveyor belts 802a.
  • the pulleys 202b are rotatably coupled to the drive pulleys 830 of the conveyors 800 by stub shafts 835. With the disclosed construction, rotation of the drive shaft 806 concurrently advances the conveyor belts 202', 801 a and 802a.
  • the auxiliary conveyors 800, 803 include inner end portions that are movable towards and away from the test station and test rim 24'.
  • Fig. 15 illustrates the retracted or "out" position of the auxiliary conveyors 800, 801 .
  • the inner ends IE (shown in Figs. 14 and 15) of the auxiliary conveyors 800, 801 are moved outwardly or retracted a sufficient distance in order to provide clearance 204" for the lower rim 24' but are sufficiently extended to provide some support for the tire so that the tire can be engaged and lifted from the rim 24' when the overall conveyor assembly 200' is raised.
  • the inner ends IE move towards away from a centerline CL of the tire test station or tire testing rim 24' .
  • the centerline CL is shown as centered with respect to the tire testing rim 24'.
  • the "centerline” may be offset from the actual true center of the tire testing rim 24', as is shown in Fig. 19.
  • auxiliary conveyors 800, 801 the overall construction of the auxiliary conveyors 800, 801 is illustrated.
  • the conveyors 800, 801 are functionally similar. In the illustrated embodiment, however, the conveyors 801 have a larger longitudinal extent than the conveyors 800.
  • Both conveyors 800, 801 include inner end portions that are movable towards and away from the test station and, in particular, are movable away from the test station in order to provide clearance for the test rim 24' when the overall conveyor 202' is lowered in order to place a tire to be tested on the test rim.
  • the overall conveyor 200" is lowered to place the tire on the test rim 24', for some applications the test rim 24' could be arranged to move upwardly in order to engage a tire carried by the conveyor belts.
  • the tire test rim 24' must be moved relative to the conveyor assembly 200' until a given diameter of the test rim, i.e., 24a is above a plane P (shown in Figs. 18A, 18B, 21 and 22B) defined by the conveyor belts 202', 802a and 801 a, in order to engage and lift the tire from the conveyor belts.
  • the conveyors 800, 801 are functionally similar. Because the conveyors 801 have a larger longitudinal extent, the conveyors 801 include additional guide/support rollers 9.12 to support the lower rung of the conveyor belt 801a and prevent excessive sagging of the belt.
  • the extension and retraction function of the inner ends of the conveyors 800, 801 are substantially similar, and, hence, the extension and retraction function will be described in connection with the conveyors 800. It should be understood that the same functional principles of operation apply to the conveyors 801.
  • each auxiliary conveyor 800 includes a fixed portion indicated, generally by the reference character 800a and a laterally movable portion 800b.
  • the fixed portion 800a includes a pair of sprockets or toothed rollers 810, 810a having fixed axes of rotation
  • the movable portion 800b is a roller assembly that is laterally movable in the left and right directions, as viewed in Fig. 16A, ] 6B, 16C and which includes a rotatable toothed belt roller 814 and an idler roller 814a both carried by a link or channel 816.
  • the length of the belt path does not change, as the movable portion 800b of the conveyor 800 moves laterally and, thus, the belts 802 can continuously travel, regardless of whether the conveyors 800 are extended or retracted.
  • Figs. 17A, 17B and 17C illustrate an example of an auxiliary conveyor support 820, which includes telescoping U channels, 820a, 820b.
  • the channel 820a and rotatable belt sprocket and roller form the movable portion 800b of the auxiliary conveyor 800.
  • the link 816 may be formed by the channel 820a or be a separate component attached to the channel 820a.
  • the channel 820a is supported for sliding movement with respect to a fixed channel 820b.
  • the fixed channel 820b may be directly supported by an associated existing inlet conveyor 200' and may be directly attached to the conveyor side supports 210, as shown in Fig 1 7A.
  • the movable channel 820a may be moved to its retracted and extended positions by pneumatic actuators 817 (shown in Fig. 13B).
  • the retracted or "out" position for an auxiliary conveyor 800 is established by adjustable stops so that the extent to which the conveyors 800 retract or move outwardly can be adjustably set in order to accommodate various sized tires.
  • the sliding channels or rail components may be a purchase part.
  • a rail or track suitable for this conveyor application can be obtained from Bishop- Wisecarver Corporation and is identified as a Utilitrak linear guide.
  • the illustrated track includes rollers 827 (only one is shown) which are mounted to the fixed track 820b by means of a spacer 825.
  • the rollers 827 are mounted to the fixed track 820b by means of a spacer 825.
  • the belt roller 810a is attached to the channel 820b by depending arm 829.
  • An upwardly extending L-shaped arm 831 extends upwardly and is secured to an axle/bolt 835 that extends through the roller 810a and rotatably supports the roller 810a.
  • the arm 831 is suitably secured to the channel 210' of the outer conveyor by a fastener 833, which also rotatably mounts guide rollers 823 for supporting the lower rung of the belt 202' and inhi bits excessive saggi ng.
  • Figs. 1 8A, 18B, 19 and 20 illustrate another embodiment of the invention, in this embodiment, the laterally extendable auxiliary conveyors 800 are fitted with tire support pawl assemblies 900 for providing additional support to tires as they are mounted and dismounted from the rim 24'.
  • Fig. 21 the relationship between extremely low profile tires and the auxiliary conveyor belt 800 is illustrated. As seen in Fig. 21 , if an extremely low profile tire 20" is held by the innermost step 24a of the rim 24', the outer diameter of the tire 20" is less than the diameter of the outermost step 24c of the rim 24' . As seen clearly in Fig. 21 the tire 20" cannot be engaged or supported by the auxiliary conveyor belts 802, since the spacing of the auxiliary conveyor belts 802 must allow clearance for the rim 24' .
  • the auxiliary tire support paw! assemblies 900 are utilized to provide support for tires that have an outer diameter that cannot be supported by the auxiliary conveyors 802. In the preferred and illustrated embodiment, these auxiliary support pawl assemblies 900 are carried at the inner ends of each auxiliary conveyor 800.
  • the support pawl assembly 900 includes a pivotally mounted toggle 902 that is movable between an inner and outer position.
  • the toggle includes a tire support surface 902a, which is engageable with the sidewa!l of a tire.
  • the toggle is pivotally mounted to a support plate 906 by a pivot 904.
  • a pair of vertically spaced stops 91 1 , 912 determines the extremes of movement of the toggle 902.
  • a tension spring 920 extending between the toggle and a fixed spring mount 922 held by the support plate 906 is arranged in a "over center" configuration so that it exerts a tension force on the toggle to maintain the toggle in either a retracted position or an extended position.
  • the toggle 902 also includes camming surfaces 902b, 902c extending in an angular fashion from the top surface 902a. Referring to Fig. 22A, as the conveyor assembly 200' is raised (which raises the auxiliary conveyors 800 and attached pawl assemblies 900), the lower camming surface 902c of the toggle 902 contacts the outer diameter 24c of the rim 24', which causes the toggle 902 to pivot clockwise (as viewed in Fig. 22A) so that it is toggled to the position shown in Fig.
  • the spring 920 maintains the "extended” position of the toggle 902 once the line of action of the spring passes the pivot axis 904 for the toggle 902. In this position, the toggle 902 is held against the lower stop 910 and now the top surface 902a of the pawl 902 is in a position to engage the sidewall of the tire and cause the tire 20" to be raised off the rim 24' as the conveyor 200' moves upwardly (see Fig. 22B).
  • the pawl mechanism 900 is suitably attached to the inner ends of each auxiliary conveyor 800, 801 .
  • the auxiliary conveyors 800, 801 may be moved to their innermost positions as shown in Fig. 1 8 or, alternately, they may move inwardly a sufficient distance, as shown in Fig. 19, to engage and support the sidewall of the tire.
  • the present invention facilitates the transport and testing of low-profile tires, which today, are becoming more and more common.
  • the auxiliary conveyors 800 may be used alone for applications in which the low-profile tires have an outside diameter that is greater than the largest diameter 24c of the tire rim 24'.
  • the auxiliary support pawl assemblies 900 are used to provide a means for engaging the tire in order to mount and dismount the tire from the rim 24'and to transport the tire to and from the testing station.
  • the inlet conveyor assembly 200 or improved conveyor assembly 200' operates as follows. Prior to receiving a tire at the centering station, the inlet conveyor 200 and elevator 250 are lowered by the actuator 1 10 to the position shown in FIG. 6. A tire 22 then is driven onto the fixed conveyor 150 by the kick roller 130. Once a tire is positioned at the centering station, centering mechanism 300 is actuated to move centering arms 302 toward the tire until the rollers 304 center the tire. One of the centering rollers 304 is actuated to rotate the tire and the lubricant applicator is operated to raise the applicator roll. The applicator roll then is moved laterally into the rotating tire and the lubricant is applied to the upper and lower beads of the tire.
  • the applicator roll then is lowered and rotation of the centering roller is stopped.
  • the centered and lubricated tire is ready to be conveyed to the testing station.
  • the elevator 250 and inlet conveyor 200 are raised by actuator 1 10 until the conveyor belts 202 pick up the tire and, in effect, raise it above the fixed conveyor 150, this position of the conveyor being shown in solid lines in Fig. 6.
  • Each roller 304 is mounted such that it can be moved vertically a predetermined distance in order to accommodate relative movement between the tire and the centering arms 302 as the conveyor engages and lifts the tire.
  • the centering arms 302 then are moved outwardly to their retracted positions.
  • the tire to be tested now supported by the conveyor 200 or conveyor 200', has been centered with respect to centering axis 54 and is located a predetermined distance from the rotational axis 56 of the spindle assembly 30.
  • the conveyor actuator 276 then is actuated to advance the tire the predetermined distance toward the testing station 12 until the tire is disposed above and is coincident with the rotational axis 56 of the spindle assembly 30, this position being indicated by tire 20 shown in phantom in Fig. 2.
  • the actuator 1 10 then is energized to lower the conveyor 200 (or conveyor 200') and position the tire 20 onto the spindle assembly 30.
  • FIG. 6 shows the conveyor 200 in its lowered position with tire 20 located on spindle assembly 30 (and clamped between the rims carried by spindle and chuck assemblies 30, 32).
  • conveyor actuator 276 then would be reverse actuated to return the belts 202 (and belts 803) to their starting position.
  • another tire "IT" may be brought into the centering station by kick roller 1 30 and subsequently centered while a tire is being tested at the testing station 12.
  • Conveyor 200 then is raised to the position of FIG. 2 to pick up tire 22 (which has been centered) off of conveyor 150 and tire 20 (which has been tested) off of spindle assembly 30.
  • the inlet conveyor transports tire 22 to the testing station and tire 20 to an exit conveyor, as shown in Fig. 1.
  • One benefit of the preferred embodiment of the inlet conveyor is that there is no direct mechanical coupling between the inlet conveyor and the testing station of the machine, i.e., neither the centering station nor the tire conveyor is mechanically coupled to the testing station. Only electrical and data connections are made between the inlet conveyor and testing station.
  • the elimination of a mechanical connection between the iniet conveyor and testing station ensures that disturbances affecting the centering station and/or the conveyor, for example, vibrations, shocks, etc., are not transmitted to the testing station.
  • the inlet conveyor forms part of or is connected to the testing machine, in the invention such disturbances will, not result in erroneous or inconsistent uniformity readings or determinations.
  • the inlet conveyor of the invention may easily be relocated relative to the remaining components of the testing machine to permit reversal of the direction of tire flow.
  • the inlet conveyor 10 may be moved to the left end of the machine while the exit assembly 14 is moved to the right end.
  • the inlet conveyor of the invention permits reversing the direction of tire flow though an existing machine in a relatively quick and easy manner.
  • This aspect of the invention provides additional flexibility in that a user can select an optimum tire flow direction when initially installing a tire testing machine.
  • Prior art inlet conveyors used with tire testing systems did. not provide such flexibility. While it is preferred to mechanically isolate the inlet conveyor of the invention from the testing station for the reasons discussed above, those skilled in the art will of course recognize that the conveyor disclosed herein could be mechanically coupled to the testing station should it be desirable for a given application.
  • the invention has been described in connection with a tire uniformity testing station. It should be understood that the disclosed tire handling apparatus including the auxiliary conveyors and tire support pawl assemblies can be used in other tire testing machines such as dynamic balancing machines which check the balance of unmounted tires. Those skilled in the art may adapt the invention to function on other types of machines, which require the handling of circular or annular products.
  • the present invention should therefore not be limited to a tire handling apparatus or conveyors that are used on tire uniformity testing equipment and systems.
  • the present invention provides a method and apparatus for modifying existing conveyors to enable existing tire testing systems to handle "low profile" tires in addition to more conventional tires. As a result, the present invention has been described above as an improvement to an existing conveyor system that is used to convey conventional tires into and out of a testing station.
  • the "auxiliary conveyors" described above can be added to an existing tire handling conveyor in order to accommodate "low profile" tires.
  • the present invention can be used as a stand-alone tire handling conveyor.
  • the conveyor belt 202' and associated hardware shown in Figs. 13a and 13b can be eliminated if desired.
  • the stand-alone configuration is shown in Figs. 14 and 18.
  • auxiliary conveyors 800, 801 have been disclosed as a means for conveying "low profile” tires, the present invention contemplates using the “auxiliary conveyors” as primary conveyors for conveying a!l size tires.
  • the present invention should, therefore, not be limited to a configuration, which utilizes “auxiliary conveyors” in combination with other, existing conveyors.
  • the invention does contemplate using the "auxiliary conveyors” 800, 801 as the sole conveying method and apparatus in a tire testing machine or system with and without tire support pawl assemblies 900 (see Figs. 14 and 18).
  • the embodiments illustrated and discussed above utilize both a first conveyor and an auxiliary conveyor.
  • the first conveyor includes a continuous belt 202' located adjacent and. in the same plane as the auxiliary conveyors 801a, 802.
  • the conveyor belt 202' extends from a roller/pulley 202 located at a receiving end of the conveyor to a pulley/roller 202b located at a discharge end of the conveyor.
  • the auxiliary conveyor apparatus includes two sections.
  • One section is upstream and extends from the delivery end of the conveyor and extends to the test station and is operative to deliver a tire to be tested to the test position and the second downstream section extends from the tire testing position to the delivery end of the conveyor and is operative to transfer a tire from the test station to an exit end of the overall conveying apparatus.
  • the invention contemplates a first conveyor having multiple sections with associated conveyor belts, rather than a single conveyor belt 202'.
  • the present invention also contemplates a conveyor system that utilizes only the "auxiliary" conveyors 800, 801 .
  • This configuration may be useful in a tire testing system that only tests tires with narrow sidewails such as ' : Iow profile" tires, in this contemplated tire testing application, the conveyor belt 202' and associated hardware would be eliminated.
  • This configuration is actually shown in Fig. 1.4.
  • Rotary actuators, i.e., servomotors would be used to concurrently drive the conveyors 800, 801 .
  • the configuration, which utilizes both a first conveyor and the auxiliary conveyors, would be used in applications where a wide variety of tire sizes and tire styles are to be tested.
  • the configuration illustrated in Figs. 13A, 13B has great flexibility with regard to the types of tires that can be tested at the test station.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Testing Of Balance (AREA)

Abstract

L'invention concerne un dispositif transporteur qui permet de transporter des pneus à travers un système d'essai de pneus, tel qu'une machine d'essai d'uniformité des pneus. Le dispositif comprend un premier transporteur, comprenant une paire de courroies transporteuses espacées, définissant une surface de support de pneus pouvant venir en contact avec le pneu devant être transporté. Le dispositif comprend également un transporteur auxiliaire comprenant une paire de courroies transporteuses auxiliaires, espacées, qui peuvent également venir en contact avec le pneu devant être mis à l'essai. Le transporteur auxiliaire comprend une section amont pour transporter le pneu d'une position de chargement à une position d'essai de pneu, et une section aval pour transporter un pneu de la position d'essai de pneu à une position de déchargement. Les transporteurs auxiliaires, comprenant des parties d'extrémité internes qui sont extensibles et rétractables par rapport à la position d'essai de pneu et, en particulier, par rapport à une jante d'essai de pneu située à l'emplacement d'essai.
PCT/US2011/066387 2010-12-23 2011-12-21 Dispositif et procédé de manipulation de pneus WO2012088226A1 (fr)

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US61/426,747 2010-12-23

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DE102013011860A1 (de) * 2013-07-16 2015-01-22 Servus Intralogistics Gmbh Transportroboter mit Einzugsvorrichtung für Transportgüter
DE102014207090B4 (de) 2013-05-08 2019-10-10 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Reifentestmaschinenfördereinrichtung
DE112014000787B4 (de) * 2013-03-15 2021-02-04 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Reifenprüfmaschine und -verfahren
IT202000032165A1 (it) * 2020-12-23 2022-06-23 Dallan Spa Nastro trasportatore
CN117902256A (zh) * 2024-03-19 2024-04-19 四川显为智能装备有限公司 一种物料搬运机器人及控制方法
CN117902256B (zh) * 2024-03-19 2024-05-31 四川显为智能装备有限公司 一种物料搬运机器人及控制方法

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Publication number Priority date Publication date Assignee Title
DE112014000787B4 (de) * 2013-03-15 2021-02-04 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Reifenprüfmaschine und -verfahren
DE102014207090B4 (de) 2013-05-08 2019-10-10 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Reifentestmaschinenfördereinrichtung
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CN117902256B (zh) * 2024-03-19 2024-05-31 四川显为智能装备有限公司 一种物料搬运机器人及控制方法

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