Press safety device
First Claim
1. In a safety device for a machine with coverging parts between which stock material is manually inserted, and having means for insuring selective manipulation of the hands of the machine operator between a feed position and a safety position, the improvement comprising:
- a ram adapted for connection with a stationary portion of the machine, and including a rod mounted for reciprocation along a plane substantially parallel with the plane along which the machine parts converge;
a collar adapted for connection with a portion of said machine which reciprocates with a moving one of said converging machine parts, and including a central aperture therethrough in which said rod is slidingly received;
a sleeve connected with said rod at a position thereon disposed downstream of said collar in the direction of convergence of the moving machine portion to which said collar is connected;
said sleeve being shaped for selective abutment with said collar;
means for operably connecting said hand manipulation means with said sleeve; and
means for activating said ram and translating said rod at the beginning of each machine cycle in a direction identical with the converging motion of said moving one machine part, whereby said rod translation activates said manipulation means and positively insures that the hands of the machine operator are drawn out from inbetween the converging machine parts to said safety position; and
in the event that said ram does not translate at the beginning of the machine cycle, said collar abuttingly engages said sleeve during the converging stroke of the machine, and moves said rod therewith to activate said hand manipulation means and draw the hands of the user into the safety position.
1 Assignment
0 Petitions
Accused Products
Abstract
The specification discloses a safety device for presses and other similar machines in which stock material is manually inserted between converging machine parts. A ram and sleeve arrangement cooperates with a collar mounted on the moving portion of the machine to insure that the operator'"'"'s hands are drawn completely back to the safety position prior to the commencement of the machine stroke. In the event that the ram does not operate at the commencement of the press cycle, the collar abuts the sleeve on the downward stroke of the press, and moves the pull-back mechanism therewith to the safety position.
110 Citations
22 Claims
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1. In a safety device for a machine with coverging parts between which stock material is manually inserted, and having means for insuring selective manipulation of the hands of the machine operator between a feed position and a safety position, the improvement comprising:
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a ram adapted for connection with a stationary portion of the machine, and including a rod mounted for reciprocation along a plane substantially parallel with the plane along which the machine parts converge; a collar adapted for connection with a portion of said machine which reciprocates with a moving one of said converging machine parts, and including a central aperture therethrough in which said rod is slidingly received; a sleeve connected with said rod at a position thereon disposed downstream of said collar in the direction of convergence of the moving machine portion to which said collar is connected;
said sleeve being shaped for selective abutment with said collar;means for operably connecting said hand manipulation means with said sleeve; and means for activating said ram and translating said rod at the beginning of each machine cycle in a direction identical with the converging motion of said moving one machine part, whereby said rod translation activates said manipulation means and positively insures that the hands of the machine operator are drawn out from inbetween the converging machine parts to said safety position; and
in the event that said ram does not translate at the beginning of the machine cycle, said collar abuttingly engages said sleeve during the converging stroke of the machine, and moves said rod therewith to activate said hand manipulation means and draw the hands of the user into the safety position. - View Dependent Claims (2, 3, 4)
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5. In a safety device for a machine with converging parts between which stock material is manually inserted, and having means for insuring selective manipulation of the hands of the machine operator between a feed position and a safety position, the improvement comprising:
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a ram adapted for connection with a stationary portion of the machine, and including a rod mounted for reciprocation along a plane substantially parallel with the plane along which the machine parts converge; first means adapted for connection with a portion of said machine which reciprocates with a moving one of said converging machine parts, and including a hollow portion in which said rod is slidingly received; second means connected with said rod at a position thereon disposed downstream of said first means in the direction of convergence of the moving machine portion to which said first means is connected;
said second means being shaped for selective abutment with said first means;means for operably connecting said hand manipulation means with said rod; and means for activating said ram and translating said rod at the beginning of each machine cycle in a direction identical with the converging motion of said moving one machine part, whereby said rod translation activates said manipulation means and positively insures that the hands of the machine operator are drawn out from inbetween the converging machine parts to said safety position; and
in the event that said ram does not translate at the beginning of the machine cycle, said first means abuttingly engages said second means during the converging stroke of the machine, and moves said rod therewith to activate said hand manipulation means and draw the hands of the user into the safety position. - View Dependent Claims (6)
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7. In a safety device for presses and the like which have a stationary die half and a reciprocating die half between which stock material is manually inserted, the improvement comprising:
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means operably connected with the machine operator for positively withdrawing the hands of the operator from inbetween the die halves during the stroke of the press;
said withdrawing means having a feed position wherein the operator is permitted sufficient limb movement to place the stock material between the die halves, and a safety position wherein the hands of the operator cannot be positioned between the die halves;
said withdrawing means including an actuator arm which is longitudinally translated to shift said withdrawing means between the feed and safety positions;a ram adapted for connection with a stationary portion of the press, and including a reciprocating ram rod; a control rod operably connected with said ram rod and mounted for reciprocation therewith in a plane parallel with the plane along which said reciprocating die half translates; a collar adapted for connection with a moving portion of said machine which translates with said reciprocating die half;
said collar including an aperture in which said control rod is telescopingly received;a sleeve connected with said control rod at a position thereon disposed downstream of said collar in the direction of convergence of said moving machine portion;
said sleeve being shaped for abutment with said collar;means on said sleeve for operably connecting said actuator arm therewith; means for activating said ram and translating said control rod at the beginning of each machine cycle in a direction identical with the converging motion of said moving machine part, whereby said control rod translation moves said sleeve and the actuator arm therewith from the feed position to the safety position to positively insure that the hands of the operator are disposed completely out from inbetween said die halves prior to the commencement of the machine stroke; and
in the event said ram rod does not translate, said collar abuttingly engages said sleeve during the converging stroke of the moving portion of the machine and moves said sleeve and said rod therewith, thereby translating the actuator arm and pulling back the hands of the operator to the safety position. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. In press machines and the like having a stationary die half and a reciprocating die half between which stock material is manually inserted, and means for positively withdrawing the hands of the operator from inbetween the die halves during the stroke of the press, wherein said hand withdrawing means includes an actuator arm which is longitudinally translated to operate said means, the improvement comprising:
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a ram connected with a stationary portion of said press, and including a reciprocating rod; a control rod operably connected with said ram rod and reciprocating therewith in a plane parallel with the plane along which said reciprocating die half translates; a collar connected with a moving portion of said machine which translates with said reciprocating die half;
said collar including an aperture in which said control rod is telescopingly received;a sleeve connected with said control rod at a position thereon disposed downstream of said collar in the direction of convergence of said moving machine portion;
said sleeve being shaped for abutment with said collar;means for connecting said actuator arm with said sleeve; means for activating said ram and translating said control rod at the beginning of each machine cycle in a direction identical with the converging motion of the reciprocating die half, whereby control rod translation moves said sleeve and said actuator arm therewith to positively insure that the hands of the operator are disposed in a safety position completely out from inbetween said die halves prior to the commencement of the machine stroke; and
in the event said ram rod does not translate, said collar abuttingly engages said sleeve during the converging stroke of said moving portion of said machine and moves said sleeve and said rod therewith, thereby translating said actuator arm and pulling back the hands of the operator to said safety position. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification