US1961261A - Concrete pipe stripper - Google Patents

Description

June 5, 1934- B. J. UKROPINA CONCRETE PIPE STRIPPER 5 Shets-Sheet 1 Filed Sept. 29, 1951 m. N 3 MN MW.

.m H w x J erm A Ill I l I III I m Ii P m uh a. t

AN 02 5 m2 ATTORNEY.

June 5, 1934.

Filed Sept. 29 1931 PIE'.E

3 Sheets-Sheet 2 INVENTOR.

B.J- UKROPI NR.

ATTORNEY.

June 5, 1934. J. u op 1,961,261

CONCRETE PIPE STRIPPER Fild Sept. 29, 1931 a Sheets-Sheet 3 BJ UKROPINH.

ATTORNEY Patented June 5 1934 UNITED STATES PATENT oFFlE 4 Claims.

This invention relates to improvements in concrete pipe strippers.

The general object of the invention is to provide an improved device for removing concrete pipes 5 from the molds in which they have been formed.

A further object of the invention is to provide a device of the class described by means of which the pipe may be supported and transported after it hasbeen removed from the mold.

A specific object of the invention is to provide a device of the class described which includes a car upon which a concrete pipe in its forming mold is positioned and another car including means for engaging and supporting the concrete pipe, and means to force the first car away from the second car to thereby remove the pipe from the forming mold.

Other objects and advantages of this invention will be apparent from the following description taken in connection with the accompanying drawings wherein:

Fig. 1 is a side elevation of my improved stripping device showing a concrete pipe about to be removed from its forming mold.

Fig. 2 is a plan view of the stripping device with the mold omitted and showing the mold car as bein oved away from the stripper car.

Fig. 3 is an enlarged section taken on line 3--3 of Fig. 1.

Fig.4 is an enlarged rear end view of the device shown in Fig. 1.

Fig. 5 is an enlarged fragmentary section taken on the line 5-5 of Fig. 1.

Fig. 6 is a section taken on line 6-6 of Fig. 5.

Fig. 7 is a diagrammatic view showing the air line hook up with the control valves both in an exhaust position.

Fig. 8 is a diagrammatic View showing the control valve moved to position to cause the ram to be moved outwardly, and

Fig. 9 is a similar view showing the control valves moved to position to cause the ram to be moved inwardly.

Referring to the drawings by reference characters it will be seen that the device includes a mold car indicated generally at 10 and a stripper car which is indicated generally at 12. The mold car 10 comprises a frame 13 having wheels 14 mounted thereon which are adapted to operate on rails 15. At the center of each end of the frame 13 I provide a shoe l6 and on top of the frame 13 and extending transversely thereof I provide a pair of spaced rails 1'7 which extend outwardly from each side of the frame.

The car 10 is preferably adapted to operate in a pit between two platforms 18 as shown in Fig. 3 and the rails 17 on the 'car are adapted to be aligned with similar rails 19 on the platforms 18.

The stri per car 12 comprises a frame 20 which fi l is wider than the mold car 10 andincludes a setion 21 on each side between whichthe mold car is positioned at the beginning of the stripping operation. The stripper car 12 like the mold car' 10 includes a plurality of wheels 23 which are 6 adapted to operate on rails 24 spaced outside of the rails 15.

Adjacent the front of the stripper car 12 I provide a vertical frame 25 which includes spaced vertical channel irons 26 with their side flanges '79 facing fore and aft and spaced apart (see Figs. '5 and .6), The vertical frame 25 is preferably provided w' h suitable bracing suchasthe mem 'bers 26 which extend from adjacent the top of the frame 25 rearwardly and downwardly to the frame 20. v Positioned in the vertical frame 25 I provide a carrier block 2'7 which is shaped to conform to the interior of the channels 26 and includes a portion which extends outward between the flanges of the channels and to which retainer plates 28 are secured. The carrier block 2'7 is adapted to have vertical movement in the frame 26. Piv otally connected to the carrier block 27 adjacent the top thereof in a recess 2'7 as at 29 I provide a member 30 which includes an upwardly extending screw threaded shank 31. 'As shown the shank 31 extends upwardly between two transverse channel members 32, through a plate 33 and through a threaded hand wheel 34 which engages the plate 33; s i

Positioned in the recess 2'7 of the carrier block 2'7 and pivotally connected to the carrier block as at 35 I provide a beam 36 which is shown as comprising an I-beam. The beam 36 extends forwardly from the 'verticalframe 25 to a point intermediate the length of the forwardlyextending portion 21 of the car 12 and it extends rearwardly to adjacent the rear end of the car 12. Adjacent the forward end of the beam 36 I providea bearing member 3'7 in which a pivot pin 38is positioned.

Supported by the pivot pin 38 I provide a pipe shoe supporting frame 39 which includes spaced side plates 40 which are mounted on the pin 38. The side plates 40 are connected adjacent their upper ends by a transverse member 41 and adiacent the lower ends of thep'lates 40 I pivotally secure thereto as "at 42 one end of a bracing rod 43. The opposite end of the bracing rod 43 is piv- 1 10 otally connected to the carrier block 27 as at 44. The bracing rod 43 is made in two sections connected by a turnbuckle 45 to allow adjustment of the length thereof.

Secured to each of the side plates 49 adjacent the upper ends thereof I provide longitudinally extending angle iron members 46 which are connected at each end by transverse angle iron members 47 which may be welded or otherwise suitably secured thereto.

Removably positioned on the shoe supporting frame 39 I provide a pipe shoe 48. As shown the shoe 48 comprises an arcuately shaped plate 49 on the outer surface adjacent each longitudinal side of which is positioned a pad 50 which may be made from a strip of canvas belting. On the under side of the plate 49 and adjacent the pads 56 I secure longitudinally extending angle iron members 51 to which angularly downwardly extending plates 52 are secured. When the pipe shoe 48 is operatively positioned on the supporting frame 39 the lower ends of the plates 52 rest on the angle iron members 46 of the supporting frame and the end members 47 of the supporting frame prevent longitudinal movement of the shoe 48 relative to the frame 39.

Pivotally mounted on a transverse member 53 which is secured to the members 46 of the frame 39 as at 54 I provide a rod 55. On the opposite end of the rod 55 I pivotally mount as at 56 a wedging shoe 57. On the rod 55 I provide a hooked latch member 58 which in one position is adapted to be engaged by a hook member 59 pivotally secured to one of the side plates 40 of the frame 39. Adjacent the rear of the car 12 I provide a vertical frame 60 to which I pivotally mount as at 61 a member 62 (see Fig. 4). Rotatably positioned in the member 62 I provide an upwardly extending screw threaded shank 63 which passes through and is secured to a hand wheel 64 which rests on the upper surface of the block 62. Positioned on the shank 63 above the hand wheel 64 I provide a member 65 which includes a threaded aperture in which the shank 63 is positioned. The member 65 is pivotally connected as at 66 to a rearwardly extending arm 67 secured to the beam 36.

Mounted in the center of the car 12 and extending longitudinally therealong I provide a cylinder 68 having a piston 69 therein to which a piston rod or ram 70 is secured. Secured to the frame 20 of the car 12 forward of the vertical frame 25 I provide a bearing member 71 through which the ram 70 extends and forward of the a shut-off valve 78 bearing member 71 I provide an enlarged head 72 on the ram 70.

For operating the piston 69 in the cylinder 68 I provide on each side of the cylinder 68 a fluid tank 73 and on the opposite side a similar tank 74.

As shown in Fig. 7 the tank 73 is connected to the rear end of the cylinder 68 by a pipe 75 and the tank 74 is connected to the forward end of the cylinder by a pipe 76. The tanks 73 and 74 are shown as connected by a pipe 77 having interposed therein. When the device is in operation the valve 78 is closed and is only opened at the time a new supply of fluid is put in the tanks to equalize the levels in both tanks.

For causing operation of the piston 69 in the cylinder 68 I provide a pair of control valves 79 and 80 which are preferably mounted on an operating panel 81 adjacent the rear of the car 12. The valves 79 and 80 are each three-way valves having an inlet 82, an outlet 83 and an exhaust port 84. The passageway from one port to another in each valve is controlled by a rotor 85 which includes a recessed passageway 86 which will only connect two of the ports at a time. The rotors are shown as adapted to be operated by handles 87. The inlet port 82 of each of the valves communicate with an air supply pipe 88 and the exhaust ports may communicate with exhaust pipes 89 if desired.

The supply pipe 88 may communicate with any desired form of air supply desirable such as with an air hose connected to an air compressor and mounted on a retrieving reel.

The outlet port 83 of the valve 79 communicates with a pipe 90 which extends to the tank 73 and the outlet port 83 of the valve 86 communicates with a pipe 91 which extends to the tank 74. When the valve rotors 85 of both the valve 79 and 80 are in the position shown in Fig. 7 the air in the tank 73 and the tank 74 is exhausted therefrom. This position is the normal inoperative position of the control valves 79 and 80.

When it is desired to move the piston 69 forwardly and the ram 70 to an extended position the valves 79 and 80 are set in the position shown in Fig. 8. In this position communication is afforded in the valve 86 between the exhaust port 84 and the outlet port 83 thereof thus it will be seen that the air in the tank 74 will be open to the atmosphere. The valve 79 in this position affords communication between the outlet port 83 and the inlet port 82 thereof whereupon compressed air from the supply pipe 88 passes through the valve 79, through the pipe 90 into the tank 73 forcing the fluid therein through the pipe 75 into the rear of the cylinder 68. As the fluid enters the rear of the cylinder 68 it exerts pressure on the rear of the piston 69 thereby forcing the piston forwardly and the fluid in the cylinder in front of the piston through the pipe 76 into the tank 74.

When it is desired to move the piston 69 rearwardly to retract the ram 70 the valves 79 and 80 are set in the positions shown in Fig. 9. In this position communication is afforded in the valve 79 between the exhaust port 84 and the outlet port 83 thereof, thus it will be seen that the air in the tank 73 will be exhausted to the atmosphere. The valve 80 in this position affords communication between the outlet port 83 and the inlet port 82 thereof whereupon compressed air from the supply pipe 88 passes through the valve 80, through the pipe 91 into the tank 74, forcing the fluid therein through the pipe 76 into the forward end of the cylinder.

As the fluid enters the front of the cylinder 68 it exerts a pressure on the front of the piston 69 thereby forcing the piston rearwardly and the fluid in the cylinder in the rear of the piston through the pipe 75 into the tank 73. After the piston has reached the limit of its rearward travel the rotor 85 of the valve 80 is turned to the exhaust position as shown in Fig. 7.

The stripper car 12 is preferably self propelling and for this purpose I provide a sprocket wheel 93 which is secured to a shaft 94 of one of the pair of wheels 23 of the car 12. The sprocket 93 is driven by a sprocket chain 95 from a sprocket 96 secured to the drive shaft 97 of a transmission mechanism 98. The transmission mechanism 98 may be of any desired type and is shown as adapted to be driven by a motor 99 which is pref erably an air motor.

In operation when it is desired to remove a conpipe.

cret'e pipe such as the pipe 100 from themoldlOl in which it has been formed'usually by the centrifugal process, the car 10 is moved to a position wherein the rails 17 thereon align with the rails 19 on which the pipe to be stripped is positioned.

As shown the mold 101 is of a type which comprises a metal shell 102 having spaced metal tires 103 thereon. The mold is placed on the rails 19 in a position wherein the tires 103 are on the outside of the rails 19.

When the car 10 has been aligned with the rails 19 the mold is rolled along the rails 19 and onto the rails 17 on the car 10. After centering the mold on the car 10 chocks 104 are preferably placed in position to prevent the mold from rolling off the car.

If the beam 36 is not at the correct height the operator adjusts it by raising or lowering the carrier block 2'7 by means of the hand wheel 34, after which the operator adjusts the shoe 48 to the correct height to enter the pipe 100 by turning the hand wheel 64. The operator then swings the rod 55 towards the beam 36 so that the hook member 59 engages the latch member 58 and retains the wedging shoe in a raised position. The stripper car 12 is then run along the rails 24 until the enlarged head 72 of the ram engages the shoe 16 on the car 10. In this position of the car 12 the pipe shoe 48 has entered the pipe 100. The operator then raises the forward end of the beam 36 by rotating the hand wheel 64 to lower the rear end of the beam until the shoe 48 engages the inner surface of the pipe 100. After the shoe 48 engages the pipe 100 the operator continues to raise the forward end of the beam 36 until the Weight of the pipe and mold is carried by the beam and not by the rails 17.

The operator then releases the hook 59 from the latch 58 whereupon the wedging shoe 5'7 swings downward into engagement with the interior of the pipe 100. The wedging shoe 57 when in engagement with the pipe wedges the pipe shoe into tighter engagement should the pipe shoe start slipping when the mold is being removed.

The various elements are now in a correct position to strip the pipe 100 from the mold 101 as shown in Fig. 1.

The operator now sets the control valve 79 in the position shown in Fig. 8 to allow compressed air to enter the tank 73 to force fluid therefrom into the rear of the cylinder 68 to thereby move the piston 69 and the ram 70 forward as previously described. As the ram moves outwardly it pushes the mold car 10 away from the stripper car 12 as shown in Fig. 2.

As the mold car 10 moves away from the stripper car 12 the tire 103 at the forward end of the mold engages the adjacent rail 17 which moves the mold 101 with the car 10. The wedging shoe 57 prevents the pipe shoe 48 from slipping on the pipe so as the mold car moves away from the stripper car the pipe 100 remains stationary and the mold 101 is moved off of the After the ram 70 has reached the limit of its stroke the operator sets the control valves 79 and 80 in the positions shown in Fig. 9 to retract the ram as previously described.

Suitable skids are then placed from one platform 18 to the other and then the operator raises the rear end of the beam 36 by means of the hand wheel 64 to lower the forward end of the beam until the pipe rests on the skids. The operator then latches the wedging shoe 57 in a raised position and the forward end of the beam is further'lowere'd until thepipe shoe 48 moves out of engagement with the pipe 100. Whereupon the operator runs the strippercar 12 along the rails 24 away'from the pipe 100' until the pipe shoe 48 fully clearsthe pipe; The pipe 100 is then rolledon the skids onto the rails 19 on the opposite platform from which it was originally taken. After removing the skids and the empty mold from the mold car the device is ready to repeat the various stripping operations just described.

From the foregoing description it will be apparent that I have provided a novel concrete pipe stripping device which is simple in construction and highly efficient in use.

Having thus described my invention, I claim:

1. In a concrete pipe stripper, a stripper car, a vertical frame on said stripper car, a carrier block vertically movable in said frame, means to move said carrier block, a beam extending longitudinally of said stripper car, said beam being pivotally connected to said carrier block, a frame pivotally connected to one end of said beam, means to prevent accidental swinging of said frame, said means including a rod secured at one end to said frame and at the opposite end to said carrier block, a pipe shoe removably mounted on said frame, and means adjacent the end of said beam opposite said shoe to swing said beam about its pivotal connection to said carrier block.

2. In a concrete pipe stripper, a stripper car, a beam extending longitudinally of said stripper car and being pivotally supported on said stripper car, a frame pivotally connected to one end of said beam, means to prevent accidental swinging of said frame, a pipe shoe removably mounted on 11111 said frame, means adjacent the end of said beam opposite said shoe to swing said beam about its pivotal support, a mold car, said mold car being adapted to have a mold containing a concrete pipe positioned thereon, said mold shoe being 1-15 adapted to engage the inner surface of the pipe on said mold car and the shoe end of said beam being adapted to be raised to support the weight of said pipe, a movable ram supported on said stripper car, said ram being adapted to engage said mold car, means to move said ram to thereby move said mold car away from said stripper car, and means to move said ram in the opposite direction.

3. In a concrete pipe stripper, a stripper car, 3126 a vertical frame on said stripper car, a carrier block vertically movable in said frame, means to move said carrier block, a beam extending longitudinally of said stripper car, said beam being pivotally connected to said carrier block, a frame pivotally connected to one end of said beam, means to prevent accidental swinging of said frame, a pipe shoe removably mounted on said frame, means adjacent the end of said beam opposite said shoe to swing said beam about its pivotal connection to said carrier block, a mold car, said mold car being adapted to receive a mold containing a concrete pipe, said mold shoe being adapted to engage the inner surface of the pipe on said mold car and the shoe end of said 1% beam being adapted to be raised to support the weight of said pipe, a cylinder on said stripper car, a piston in said cylinder having a ram secured thereto, said ram being adapted to engage said mold car, means to move said piston to cause 45 said ram to move said mold car away from said stripper car, and means to move said piston in the opposite direction.

4. In a concrete pipe stripper a pair of outer rails, a pair of inner rails, a stripper car, said stripper car havingwheels thereon engaging said outer rail, a mold car, said mold car having wheels thereon engaging said inner rails,- said stripper car including forwardly projecting portions beportions, said ing arranged at spaced forwardly projecting each side of said mold car, a beam

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