Tire weight applying apparatus
An apparatus and method for facilitating the installation of balance correction weights on a wheel or a tire/wheel assebly that includes a tire handling mechanism that is operative to move a wheel or tire/wheel assembly along a path from a wheel receiving position to a wheel presenting position where a balance correcting weight is installed at a predetermined location on the wheel. An operator station supports an operator in a confronting relationship with the wheel as it is conveyed by the handling mechanism. The operator station is arranged such that when an operator is facing a wheel located at the tire presenting position, the operator is generally located in a plane that is substantially perpendicular to the path of travel of the wheel as it moves from the receiving position to the presenting position. A tire/wheel handling mechanism includes a pair of grippers for engaging the wheel (or the tire in a tire/wheel assembly) and is rotatable about a lateral axis. The handling mechanism also includes a tire rotating device for rotating the tire within the grippers about its rotational axis. The apparatus and method enables a wheel or tire/wheel assembly to be presented to a weight installing operator in a preferred orientation and to present a location on the wheel where a corrective weight is to be installed in close proximity to the operator whereby installation of a corrective weight is greatly facilitated. Preferences for a given operator can be stored so that when the wheel is at the tire presenting position it is oriented and positioned in accordance with the operator's preferences. A light source is used to illuminate or indicate a location on the wheel where the corrective weight is to be installed.
1 . An apparatus for facilitating the installation of balance correction weights on a tire that is mounted to a wheel, comprising:
a) a tire handling mechanism mounted for movement along a path and operative to move said tire along said path from a tire receiving position to a tire presenting position where a balance correcting weight is installed at a predetermined location on said tire/wheel assembly; and,
b) an operator station defining an operator position that supports an operator in a confronting relationship with said tire as it is conveyed by said tire handling mechanism from said tire receiving position to said tire presenting position.
2 . The apparatus of claim 1 wherein said operator station is arranged such that when an operator is facing a tire located at said tire presenting position, said operator is located in a plane that is substantially perpendicular to the path of travel of said tire as it moves from said tire receiving position to said tire presenting position.
3 . The apparatus of claim 2 wherein said tire handling mechanism includes a pair of grippers for engaging a periphery of said tire at two spaced locations.
4 . The apparatus of claim 3 wherein said grippers are movable towards and away from each other in order to apply a gripping force to said tire.
5 . The apparatus of claim 3 wherein said grippers are rotatable about a lateral axis, said lateral axis being substantially orthogonal to a rotational axis of said tire.
6 . The apparatus of claim 5 wherein said lateral axis is substantially parallel to said operator plane.
7 . The apparatus of claim 3 wherein said grippers are concurrently, reciprocally movable in a substantially vertical direction whereby the elevation of said tire with respect to said operator station is changed.
8 . The apparatus of claim 3 wherein at least one of said grippers includes a tire rotating device for rotating said tire within said grippers about its rotational axis.
9 . The apparatus of claim 2 wherein said operator is a human operator.
10 . The apparatus of claim 2 including a data storage device for storing operator preferences, such that when a tire is moved to the tire presenting position, said grippers are rotated about said lateral axis in order to present said tire in orientation preferred by the operator.
11 . The apparatus of claim 8 wherein said tire rotating device rotates said tire such that a location on said tire where a corrective weight is to be applied is presented in close proximity to the operator in order to facilitate installation of said corrective weight.
12 . The apparatus of claim 1 wherein said tire handling mechanism is reciprocally supported on a pair of tracks which define said path that extends from said tire receiving position to said tire presenting position.
13 . The apparatus of claim 1 wherein said tire handling mechanism includes a pair of columns, each column reciprocally supporting an associated gripper, each gripper reciprocally movable in a vertical direction along its associated column.
14 . The apparatus of claim 13 wherein said columns include a ball screw drive system whereby rotation of a ball screw causes vertical movement in the associated gripper.
15 . The apparatus of claim 18 wherein at least one of said grippers includes an encoder for monitoring the rotative position of said tire within said grippers.
16 . The apparatus of claim 5 wherein said operator is a human operator and shoulders of said operator are generally parallel to said lateral axis of rotation of said grippers when said operator is in a confronting relationship to a tire that is at said tire presenting position.
17 . The apparatus of claim 5 wherein the position to which said tire is rotated by said grippers is a function of the type of corrective weight that is to be installed.
18 . The apparatus of claim 5 wherein the position to which said tire is rotated by said grippers is dependent on preferences of the operator.
19 . The apparatus of claim 1 further including an exit conveyor which at least partially conveys said tire from said tire presenting position to an exit position.
20 . The apparatus of claim 19 wherein said exit conveyor is located below said operator station.
21 . The apparatus of claim 1 further including a light source for illuminating a predetermined location on said tire/wheel assembly at said tire presenting position.
22 . The apparatus of claim 8 wherein said tire rotating device rotates said tire held by said grippers such that a location on said tire where a corrective weight is to be installed is aligned with a light source.
23 . The apparatus of claim 3 wherein said grippers include a sensor for determining a radius of said tire.
24 . The apparatus of claim 23 wherein said sensor monitors a distance said grippers move in order to engage said periphery of said tire.
25 . A method for installing balance correcting weights on a wheel that mounts a tire, comprising the steps of:
a) determining at least one location on said wheel where a corrective weight should be installed;
b) providing an operator station for supporting a wheel weight installing operator;
c) moving said wheel along a path that is generally orthogonal to an operator that is in a weight installing position; and,
d) rotating said wheel about a lateral axis that is substantially perpendicular to the rotational axis of said wheel in order to present one side of said wheel at a confronting orientation with respect to said operator whereby the installation of a corrective wheel weight on said wheel is facilitated.
26 . The method of claim 25 wherein said wheel is rotated about its rotational axis in order to position a location on said wheel where a weight is to be installed, in close proximity to said operator.
27 . The method of claim 26 further comprising the step of rotating said wheel about said lateral axis until another side of said wheel is in a confronting relationship to said operator, such that another corrective wheel weight can be installed at a predetermined location on said wheel.