US2846041A - Retractable coil stop - Google Patents

Description

5,1958 J. N SHEPARD 2,846,041

' 1 RETRACTABLE con. STOP 1 Filed May 8; 1957 2 Sheets-Sheet 1 l/VVE/VTOR 46 JAME$N.$HEPARD 10 /Gouda 5 0461?! 2/ his Attorney.

Aug. 5'; 1958 J..N. 'SHEPARD RETRACTABLE COIL STOP 2 Sheet-Sheet 2 Filed May 8, 1957 4,846,041 j RETRACTABLE cornsror dairies 1 N. -Sh'epard, 'Goncor'd, Calif.,-= assignor 'to United tStates Steel Corporation, a corporation of New Jersey This 1 inventionrelates: to =a' retracta-ble' coil stop and more: particularly to such a stop for bringing to rest large coils :of steel strip being discharged from a cold rolling or temper mill and being --delivered to abander. Prior to an'y invention the-coils rolled-"down adelivery ramp and were gradually brought to stop by rolling-up a sharp inclined plane at the end of the delivery ramp, then rolling backuandz forthiuntili th'eyticame to restfat the lowest point of the ram. This took .between30and 45 seconds so that it delayedthebandi'ng operation. It also constituted a safety hazard. ln-additiom the prolongedrolling mp and down the delivery ramp' caused excessive scratching of the finished coil.

It is therefore an object of my invention to provide a coil stop which will bring the coil to rest faster and with less possibility of injury to the mill crew.

This and other objects will be-more apparent after referring to the following specification and attached drawings, in which:

Figure 1 is a plan View of my device with parts broken away for purposes of illustration;

Figure 2 is a view taken on the line -IIII of Figure 1 showing the coil stop in one extreme position;

Figure 3 is a view, similar to Figure 2, but showing the coil stop in the opposite extreme position;

Figure 4 is a schematic view of the pneumatic system used in my device; and

Figure 5 is an enlarged fragmentary view taken on the line V'V of Figure 1.

Referring more particularly to the drawings, reference numerals 2 and 4 indicate the entry and exit ends of a delivery ramp. The exit end 4 has an upwardly inclined portion 6. Between the portions 2 and 4 is an opening 8 for receiving a steel frame 10 which has a vertical entry wall 12 and a vertical exit wall 14. Steel plates 16 are welded around the frame 10 adjacent the entry end to provide a'shelf 18 for a purpose which will appear later. Vertical plates 20 are welded to the bottom plate 21 of the frame 10 adjacent the entry end and are adapted to receive caps 22. Support plates 24 extending upwardly to the shelf 18 may be welded to' the frame 10 and plates 20 as shown. A transverse ver-tical plate 26 is welded to the bottom 21 on the exit side of the plates 20. A pair of transverse grooves 28 are provided in the bottom of the frame 10 for receiving keys 30 which are fastened to the bottom plate 21. A hearing plate 32 made of bronze or the like is fastened to the bottom 21 between the keys 30. The keys 30 and hearing plate 32 may be fastened in any suitable manner such as 'by means of counter-sunk screws 34. A rubber bumper 36 is attached to the plate 26vby means of cap screws 38. A similar rubber bumper 40 is attached to the wall 14 also by means of cap screws 38. A guide groove 42 is provided along each longitudinal edge of the frame 10 for receiving a slide 44 as best shown in Figure 5. The guide groove 42 may be formed by means of a bronze jib 46 and a backing plate 48 fastened to the bottom 21 by means of cap screws 50. Dowel pins I 2,846,041 Patented Aug. 1,958

may also beused if desired. H The slide "445inc1ujd'es a base 52 having four vertical plates "54' welded thereto (at its entry end. Plates 54 have aligned lio'les56therein for receiving connecting pins 58. A pair 'of air cylinders-60 are :provided with pins 61 mounted 'in holes 62 provided between the plates20 and caps 22,*th'eicaps 22 being fastened to plate 62 by means "of cap scr'ewsj64.

A plate 65 may be welded to basef21 and the' twocenter plates 20. Piston 'rods '66 of the. cy1in'de'rs60 are'piv. "otally connected to pins 58. A'port 68 is provided at the forward end ofeach cylinder60 and is open'to'at- A port 70 is provided ineach of "the cyl- .inders 60 at its rearward-end. The po'rts'f70are 'conmosphere.

nected by means of piping 72 which in tu'rn is connected to a relief valve 74. A check-valve '78'is provided'in the piping 72 between compressed airfisourceand relief valve 74. A control valve' 82*is provided in: theJp'iping' 72 between the air supply 80 and check valvel78; 'A plurality of plates84 are welded to the base 52 in parallel'relationship to the plates 54. A stopblock .286 is fastened to the base 52"-by means of cap screws 88. A

transverse abutment 'is provided in the entry endof slide 44 and a similar abutment92 on the =exitend thereof. "The plates 54 and {84 "are'provid'ed :with aligned openings 94j for receiving 'a shaft '96. 'A' coil stop98 is pivotally mounted on the shaft 96. The coils'top 98 consists of a flat plate 100 and a curved plate 102 welded to each other and to a plurality of vertical plates 104 and 106. Each of the plates 104 'have a downwardly extending leg 107. Plates 104 and 106 are provided with aligned openings 108 for receiving the shaft 96 and also with aligned openings 110 for receiving spring shaft 112. A pair of spring guides 114 are mounted on shaft 112,

one on each side of the longitudinal center of the slide 44. A pair of somewhat similar spring guides 116 are welded to the base 52 one in alignment witheach of the guides 114. Springs 118 extend between'the spring guides 114 and 116. A cover 120 is placed on the shelf 18 to protect the mechanism and to serve as a continuation of the ramp 2. Spaced apart vertical plates 122 are welded to the rearward end of cover 120 and are in alignment with the spaces between plates 54 and 84. It will be understood that lock washers, cotter pins and bushby opening the valve 82 manually or automatically by movement of the coil C. The air continues to be admitted through check valve 78 until the pressure in the cylinder 60 is equal to the line pressure. rolls down the ramp 2 and over cover 120. The coil C will strike the coil stop 98 and cause it to rotate about shaft 96' and compress springs 118 as shown in 'Figure 2. This slows down the movement of the coil. After the coil passes over the coil stop 98 the springs 118 will cause the coil stop to rotate about the shaft '96 to its original position shown in Figure 3. Movement of coil stop in this direction is limited by contact of the legs 107 with the stop block 86. The coil rolls up the inclined plane 6 until its forward motion is checked and then rolls back against the coil stop 98 causing the slide 44 to move to the left as seen in Figure 3. Movement of the slide 44 is retarded by the compression of the air trapped in the cylinder 60. This cushion effect of the compressed air stops the reverse motion of the coil C which then rolls forward over thev delivery ramp 4 and The coil C up the inclined plane 6. The compressed air in the cylinder 60 then expands forcing the slide 44 to the right until it is arrested by the bumper 40. This cycle is repeated until the coilis brought to a stop. The relief valve 74 is set so that if the pressure in the cylinders 60 becomes too great it will open to allow the excess pressure to dissipate. Movement of the coil C and slide- 44 will be finally stopped by the slide contacting the bumper 36. The valve 82 may be closed either manually or automatically as desired.

While one embodiment of my invention has been shown and described it will be apparent that other adaptations and modifications may be made without departing from the scope of the following claims.

'I claim:

1. Apparatus for stopping a coil rolling along a ramp having a raised portion at one end thereof which comprises a slide mounted below the level of said ramp intermediate the ends thereof, means for urging said slide toward said raised portion of said ramp, 2. member pivotally mounted on said slide for movement about a generally horizontal axis, said member being movable from a lower position in the general plane of said ramp to a raised position above said ramp, and resilient means urging said member to said raised position.

2. Apparatus for stopping a coil rolling along a ramp having a raised portion at one end thereof which comprises a slide mounted below the level of said ramp intermediate the ends thereof, means for urgin said slide toward said raised portion of said ramp, a member pivotally mounted on said slide for movement about a gen erally horizontal axis, said member being movable from a lower position in the general plane of said ramp to a raised position above said ramp, said member in its raised position having two sloping sides above the ramp to retard movement of said coil, and resilient means urging said member to said raised position.

3. Apparatus for stopping a coil rolling along a ramp having a raised portion at one end thereof which cornprises a slide mounted below the level of said ramp intermediate the ends thereof, an air cylinder having a piston rod connected to said slide, means for admitting air to said cylinder to move said slide toward said raised portion of said ramp, means preventing escape of air from said cylinder, a member pivotally mounted on said slide for movement about a generally horizontal axis, said member being, movable from a lower position in the general plane of said ramp to a raised position above said ramp, said member in its raised position-having two sloping sides above the ramp to retard movement of said coil, and resilient means urging said member to said raised position. i

References Cited in the file of this patent UNITED STATES PATENTS

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