US2183806A - Form tie extracting means - Google Patents

Description

Dec. 19, 1939. s. s. COLT FORM TIE EXTRACTING MEANS Filed April 11, 1959 2 Sheets-Sheet l INVENTOR.

ATTORNEY.

BY pd Dec. 19, 1939. s. s. COLT FORM TIE EXTRACTING MEANS File d April 11, 1939 2 Shees-$heet 2 IN VENT OR. BY 497x019 5 QIZ ATTORNEY.

Patented Dec. 19, 1939 v UNITED} STATES ATENT OF I E 1 ,FORM TIE EXTRACTI'NG \MEANS Samuel s. Colt, West Orange, N. J.

Application April 11, 1939, Serial No. 267,241

6 Claims.

This invention relates to an improved device for extracting form wall tie rods,'wires and the like from east concrete, and for other rod and wire pulling operations; and the invention has reference, more particularly, to improvements in that type of device, for serving the purposes aforesaid, which is shown in my co-pending application for United :States Letters Patent Serial No. 205,698,'fi1ed on or. about May 3, 1938, patented May 2, 1939 as Patent No. 2,156,528.,

The present invention has for an object to provide a simple, effective and easily operated tool for the purposes stated comprising, a winch roll means and cooperative rod or wire gripping and manipulating means, a shear cam means for coiling the outwardly drawn rod or wire, means for both fulcruming the tool upon the rod or wire subject to bodily turning of the tool about the latter as well as to serve as a controlling guide for the outwardly drawn rod or wire-together with means to engage and bend the free end portion of the wire or rod, when the tool is laterally turned about the latter as a fulcrum, to thereby dispose said free end portion in lateral extension from the winch-roll means preparatory to extracting and coiling operations, and thus in position which avoids impeding operative manipulation of the tool during said extracting and coiling operations. e

Another object of this invention is'to provide a reversible rod or wire gripping means, whereby when one portion thereof is worn, it may be quickly removed and reversed to bring into service position an unused portion thereof.

Other objects of this invention, not at this time more particularly enumerated, will be understood from the following detailed descrip-' tion of the same.

An illustrative embodiment of this invention is shown in the accompanying drawings, in which:

Fig. 1 is a side elevationof the rod or wire extracting tool according to this invention as operatively applied to the work for the performance of its functions; Fig; 2 is a front elevation of the tool moved to a position whereby v the end portion of the rod isbent thereby into ,a laterally extending position preparatory to completing the extracting operation; Fig. 3 is a horizontal sectional view, taken on line 3 3 in Fig. 1; Fig. 4 is a transverse vertical sectional View, taken on line 44 in Fig. 1; Fig.5 is a perspective view of the rod or wire gripping device; and Fig. 6 is a fragmentary sectional view, similar to that of Fig. 4,but showing a modified 'vided in said cam block 23, to extend downwardly jecting from one side thereof. Mounted in said bearing hub is a pivoting. means, preferably in the form of a journal bolt 15. v Fulcrumed on said journal bolt I5 is a hand lever l6. 'Rotatably mounted on said journal bolt lii, adjacent to said hand lever I6, is a winch-roll ll. Affixed to said hand lever is a reenforcing member or yoke ,bar 18 having an offset leg portion l9 which abuts the bearing hub end, and through which the journal bolt l5 extends, theassembly being retained in .place by a nut 20 engaged on the pro jecting journal bolt end. I

Affixed to said handlever l6, in parallel spaced relation thereto abovesaid winchroll H, is a strap member 21, the lower end portion 22 forms with said hand lever a bifurcate mounting for the support of a rod or wire gripper ca'm adapted to cooperate with said winch-roll. Said gripper cam comprisesa .cam block 23 of a thickness approximating the width of the winch-roll. Said cam block 23 is provided with a substantially semi-circular lowerend having transversegripper serrations or teeth 24 on its periphery. Extend ing transversely through the cam block 23'are selectively usable bearing openings 25 and 25, respectively oppositely outwardly offset relative to the central axis of said camblock. Also prointo the body thereof, from its top end, are internally screw-threaded sockets 2! "and 28. These sockets are also respectively oppositely outwardly ofiset relative to the centralaxis of said cam block. The cam block 23is. vp'ivotall'y mounted on a transverse pivot pin 29, which is supported by and between the hand lever [B and strap member 2|, by engaging said pivot;;pin 29 through a selected bearing opening, such, e. g, as 25. Due to the offset relation of the bearing openingsrelative to the central axis of said cam block, the. latter will be eccentricallymounted, I so that, when outwardly turned, it will-be caused to grip a rod or wire between the same andthe' Winch-r011. It will be obviou's that, undersuch circumstances approximately but the outwardly extending half of its gripping serrations-or teeth 24 will be in use. If, therefore, such serrations or teeth, thus in use, become worn, the cam block may be removed and reversed by engaging the pivot pin 29 through the opposite bearing opening 26, thereby bringing the opposite half or previously unused serrations or teeth into operative position for use. Afiixed to the cam block, by selective engagement in a corresponding socket 2'! or 28, is an upwardly extending lever arm 30 for manipulating the cam block. If it be desired to obtain greater leverage than the length of said lever arm provides, a piece of pipe, of suitable length, may be telescopically engaged over the arm to thereby extend its length. To dispose and maintain the cam block 23 in out of service position, thelever arm 30 is upswung to a position parallel to the hand lever I6 (as shown by full lines in Fig. 1), and is secured by a retaining link 3| which is pivotally carried by said hand lever I6.

Cooperating with said winch-roll I1 is a sheer cam block 32, the same being supported by the bracket I3 between said winch-roll I! and the foot plate I2, preferably so as to be adjustably disposed relative to the former. The outer side of said sheer cam block is formed to provide a sheer cam face 33 in the shape of an upwardly and outwardly inclined spiral plane.

Provided in the upper end portion of the foot plate I2 is a downwardly indented slot or way 34 through which the exteriorly projecting end of a tie rod II may extend to pass over the top of the sheer cam block 32 and thence outwardly over the winch-roll II. Said sheer cam block 32 is further provided at its upper end with a guide projection 35 by which the outwardly extending tie rod portion is retained against displacement as it passes to and over the winch-roll I'I.

Cooperating with the foot plate I2 is a means for both fulcruming the tool upon the exteriorly projecting portion of the tie rod II, so that it may be turned bodily about the latter for purposes subsequently disclosed, and also to serve as a controlling guide for the outwardly drawn rod or wire, which comprises; in one form thereof, a tail piece 36 which is both slidably and rotatably supported in a transverse bearing mem ber 31 suitably aflixed to the face of said foot plate adjacent to one side of said slot or way 34. Rotatably mounted on the inner extremity of said tail piece 36 is a roller 38 having a peripheral groove or channel 39 to receive the tie rod I I. At its outer end said tail piece 36 is provided with an annularly enlarged head or finger piece 40. Mounted around the tail piece 36 between said head or finger piece 40 and the adjacent end of the bearing member 31 is a compression spring 4|, which normally moves said tail-piece 36 outwardly so as to retract the roller 38 from operative aligned relation to said slot or way 34. Connected with said foot-plate adjacent to the opposite side of said slot or way 34 is a stop lug or projection 42 which is adapted to be abutted by the roller 38, whereby the operative aligned relation of the latter relative to the slot or way 34 is determined. To hold the roller 38 in operative position, the tail piece 36 is provided with a laterally projecting lock pin 43 which cooperates with a bayonet slot 44 with which the bearing member 31 is provided. Another and simpler arrangement vof fulcruming and guide means is shown in Fig. 6, comprising a channeled r0116! 45 having a tail shaft 46 which is slidably and rotatably journaled in the bearing member 31.

Projecting outwardly from the bearing bracket I3, to extend beyond the front side or face of the winch-roll I1 is a bender lug or nose 41.

In the use and operation of the tool, after a form wall has been removed from the concrete mass I0, and the outwardly projecting end portion of a tie rod II is thereupon rendered accessible, the novel tool is applied to the latter. This is accomplished by abutting the foot plate I2 against the face of the concrete mass I0 in such manner that the tie rod extends through the slot or way 34, and thence outwardly over the winchroll H. The fulcruming and guide roller 38 or 45, as the case may be, is adjusted to operatively overlie the tie rod II so that the latter is embraced by the channeled periphery thereof. When the tool is thus positioned, the gripper cam is released and is swung downwardly to engage the tie rod with its serrations or teeth 24, thus gripping the tie rod between the same and the winch-roll H. The lever arm 3|) is now swung down so that the free end portion of the tie rod I I is turned downwardly and across the bender lug or nose 41 (see Fig. 1) After the free end portion of the tie rod is thus positioned, the operator thereupon turns the tool bodily about the tie rod in a clockwise direction, the roller 38 serving to fulcrum the tool on the tie rod for such turning movement. This bodily lateral turning movement of the tool carries the bender lug or nose 4! into engagement with the down-turned end portion of the tie rod; and, as such turning movement of the tool is continued, bends upwardly said tie rod end portion to a horizontally ofiset position indicated by the reference character II' in Figs. 2 and 3. By such manipulation said tie rod end portion I I is so disposed as to assure its clearance of the tool parts and adjacent face of the-concrete mass I0,when, by further operation of the tool, the oiling or winding of the tie rod occurs coincident with the extracting movement thereof. When the end portion II' of the tie rod is disposed in the horizontally ofiset position described, the tool is swung back to normal initial position, shown by dotted lines in Fig. 2.

After the tool is returned to normalinitial position, the lever arm 30 is oscillatingly swung back and forth, thereby drawing outward the tie-rod from the concrete mass, while at the same time bending the same about the winch-roll l'I. As this bending of the rod continues, the bent portions will be carried into engagement with the sheer face 33 of the sheer block 32 so that, as moved in contact therewith, the bending rod will be caused to sheer outwardly in a spiral path, thus progressively coiling the tie rod as it is extracted (see Fig. 3) and until it is'entirely withdrawn from said concrete mass, after which the tool is removed, and the coiled tie rod is detached therefrom thus freeing the tool for further use.

In some cases it may be desired to use the tool to extract rods or wires before the form wall structure is removed from the cast concrete. Under such circumstances, the tool is footed against the form structure, and after preparatory operation'and when positioned for completing the extracting operation the tool may be fixed to the form structure by nails driven through the openings 48 provided in the foot plate for that purpose.

I am aware that various changes could be made in the construction of the above described tool, and many apparently widely different embodiments of the novel features thereof could be made without departing from the scope of the present invention as defined by the following claims. It is therefore intended that all matter contained in the above description and shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

I claim:

1. In a tool for the purposes described, a foot plate structure having a way for the extension of a tie rod or the like therethrough, supporting means fulcrumed in connection with said foot plate structure, a winch-roll axially aligned with the fulcrum of said supporting means, gripper means pivotally carried by said supporting means for cooperation with said winch-roll, lever means for actuating said gripper means and supporting means relative to said winchroll, a sheer cam block cooperative with said winch-roll, means engageable with a tie rod extending through said foot plate structure operative to fulcrum the tool on said tie rod for lateral bodily turning movement, and bender means carried by said foot plate structure to engage and bend an angularly downturned end portion of the tie rod to a horizontally laterally projecting position when the tool is bodily turned laterally.

2. In a tool for the purposes described as defined in claim 1 wherein the tie-rod engaging means for fulcruming the tool for lateral turn.- ing movement comprises a roller having a channeled periphery to embrace said tie rod, and means to support said roller for movement to and from tie rod engaging position.

3. In a tool for the purposes described, a foot plate structure, supporting means fulcrumed in connection with said foot plate structure, a winch-roll axially aligned with the fulcrum of said supporting means, and a reversible gripper means having a toothed operative portion opposed to said winch-roll for gripping a tie rod end portion between the same and said winch-roll, selective means for eccentrically pivoting said gripper means on said supporting means optionally in one or a reversed position, and a lever arm for actuating said gripper means and supporting means relative to said winchroll. 1

4. In a tool for the purposes described, a foot plate structure, supporting means fulcrumed in connection with said foot plate structure, a winch-roll axially aligned with the fulcrum of said supporting means, and a reversible gripper means having a toothed operative portion opposed to said winch-roll for gripping a tie rod end portion between the same and said Winchroll, selective means for eccentrically pivoting said gripper means on said supporting means optionally in one or a reversed position, a lever arm for actuating said gripper means and supporting means relative to said winch-roll, and selective means to operatively connect said lever arm withsaid gripper means in correspondence with a given selected operative position in which the latter is assembled.

5. In a tool for the purposes described, a foot plate structure having a way for the extension of a tie rodor the like therethrough, supporting means fulcrumed in connection with said foot plate structure, a winch roll axially aligned with the fulcrum of said supporting means, a roller having a channeled periphery to embrace said tie rod, means to support said roller for movement to and from an operative tie rod engaging position intermediate said way and said winchroll, a sheercam block cooperative with said winch-roll, gripper means pivotally carried by said supporting means, and lever means for actuating said gripper means and supporting means relative to said winch-roll.

6. A reversible gripper means having a serrated operative portion for gripping Work to which it is applied, selective means for eccentrically pivoting said gripper means on a support optionally in one or a reversed position,

and lever means for actuating said gripper means.

SAMUEL S. COLT.

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