Pulling over mechanism

Abstract

A pulling over mechanism for stretching about a last toe portion of an upper that is mounted on the last preparatory to wiping the margin of the toe portion of the upper against an insole that is located on the last bottom. The mechanism includes pincers jaws that are caused to grip the upper margin under relatively light force while the last is raised to allow the upper margin to slip between the pincers jaws. After the last has completed its rise, the pincers jaws are caused to grip the upper margin under relatively heavy force so as to preclude slippage of the margin between the pincers jaws if the pincers should be lowered to relocate the stretched upper on the last.

I claim: 
     
       1. A pulling over mechanism comprising: a support, mounted for heightwise movement between lower and upper support positions, for supporting bottom-down a shoe assembly that includes a last having an upper mounted thereon; a pincers formed of a pair of jaws that are closable towards each other from an open position wherein the jaws are spaced from each other; means mounting the pincers for heightwise movement; pincers closing means operable to impart closing movement to the pincers jaws under a variable force; means retaining the pincers in an upper pincers position; means initially retaining the support in said lower support position; means thereafter raising the support from said lower support position to said upper support position to thereby raise the shoe assembly; means, effective during said rise of the support, to cause the pincers closing means to impart closing movement to the pincers jaws under a relatively light force against the margin of the upper which is inserted between the jaws; control means, effective .[.when the support has arrived at.]. .Iadd.no earlier than as the support completes its rise to .Iaddend. said upper support position, to cause the pincers closing means to impart closing movement to the pincers jaws under a relatively heavy force; and means .[.thereafter.]. enabling the pincers to be lowered from said upper pincers position .Iadd.when the support is in said upper support position. .Iaddend. 
     
     
       2. The mechanism as defined in claim 1 further comprising: means responsive to the arrival of the support at said upper support position to operate said control means. 
     
     
       3. The mechanism as defined in claim 2 further comprising: a post, to which the support is secured, mounted for heightwise movement; means initially retaining the post in a lower position to thereby retain the support in said lower support position; means for raising the post to thereby raise the support to said upper support position; means mounting said control means to said post for heightwise movement therewith; an actuator, located in registry with the control means above the control means, mounted to the post for heightwise movement; means yieldably urging the actuator upwardly with respect to the post; and a stud so fixedly located above the actuator in registry with the actuator as to lower the actuator with respect to the post and thus cause the actuator to actuate the control means when the post has raised the support to said upper support position. 
     
     
       4. A pulling over mechanism comprising: a support, mounted for heightwise movement between lower and upper support positions, for supporting bottom-down a shoe assembly that includes a last having an upper mounted thereon; a pincers base; a first motor, mounted to said pincers base, having a first rod that is movable heightwise in response to actuation of said first motor; a second motor, connected to said first rod, having a second rod that is movable heightwise in response to actuation of said second motor; a pincers, mounted to said second motor, formed of a pair of jaws that are closable towards each other from an open position wherein the jaws are spaced from each other; a pincers closing member connected to the second rod; said pincers jaws and said pincers closing member being so constructed and arranged as to cause the pincers closing member to close the jaws, in response to the raising of the second rod, an amount that is proportional to the elevation of the pincers closing member by the second rod; means causing the first motor to raise the first rod to thereby retain the pincers in an upper pincers position; means initially retaining the support in said lower support position; means thereafter raising the support from said lower support position to said upper support position to thereby raise the shoe assembly; means, effective during said rise of the support, to cause the second motor to move the second rod upwardly under relatively low pressure to thereby cause the pincers closing member to impart closing movement to the pincers jaws under a relatively light force against the margin of the upper which is inserted between the jaws; control means, effective .[.when the support has arrived at.]. .Iadd.no earlier than as the support complete its rise to .Iaddend. said upper support position, to cause the second motor to move the second rod upwardly under relatively heavy pressure to thereby cause the pincers closing member to impart closing movement to the pincers jaws under a relatively heavy force; and means .[.thereafter.]. enabling the first motor to be actuated to lower the first rod and thereby lower the pincers from said upper pincers position .Iadd.when the support is in said upper support position. .Iaddend. 
     
     
       5. The mechanism as defined in claim 4 further comprising: means responsive to the arrival of the support at said upper support position to operate said control means. 
     
     
       6. The mechanism as defined in claim 5 further comprising: a post, to which the support is secured, mounted for heightwise movement; means initially retaining the post in a lower position to thereby retain the support in said lower support position; means for raising the post to thereby raise the support to said upper support position; means mounting said control means to said post for heightwise movement therewith; an actuator, located in registry with the control means above the control means, mounted to the post for heightwise movement; means yieldably urging the actuator upwardly with respect to the post; and a stud so fixedly located above the actuator in registry with the actuator as to lower the actuator with respect to the post and thus cause the actuator to actuate the control means when the post has raised the support to said upper support position.