US1217488A

US1217488A - Rod-bending machine.

Info

Publication number: US1217488A
Application number: US4703415A
Authority: US
Inventors: Walker B Myers
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-08-24
Filing date: 1915-08-24
Publication date: 1917-02-27
Anticipated expiration: 1934-02-27

Description

W. B. MYERS.

BOD BENDING MACHINE. APPLICATION rLED Aua.24. |915.

Patented Feb. 27, 1917.

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WALKER B. MYERS, F DENVER, COLORADO.

ROD-BENDING MACHINE.

' ver, in the county of Denver and State of Colorado, have invented certain new and useful'lmprovements in Rod-Bending Machines, of which the following is a specification.

This invention relates to a rod-bending machine, and its principal object resides in providing a mechanism of simple construction which in itsV operation bends rods to one or more angles of any desired size:

The machine is more particularly designed to form steel and iron rods for use as reinforcements in concrete and cement structures, and it is provided with suitable' adjustments to determine the angles atwhich the rods are to be bent, and with gages which p j which is held stationary in a rod-rest hereestablish the correct distances between a plurality of bends in one rod.

'The above and other objects all of which will fully appear in the following description, attain by the mechanism'illustrated in the accompanying drawings in the various views of which like parts are similarly designated, and in which,

Figure 1 is a plan view of the machine,

Fig. 2, a side elevation of the same,

Fig. 3, an enlargedplan view of the operating mechanism of the machine,

Fig. 4, a section taken along the line 1 -4, 'pig' 3 j n Fig. 5, 'a section along the line 5 5, Fig. 4, and

Fig. 6, a fragmentary plan view of the mechanism shown-in Fig. 3 with the parts of the operating mechanism in the positionsv they assume during the bending process.

Referring more 'specically to the drawings, the reference numeral 2 designates a table mounted upon a suitable supporting structure 3, and provided with an extension 4 for the support of the portion of vtherod that is being bent at an angle to its body portion.

Mounted in suitable bearings is an upright shaft 5 which at a point near the foot of the supporting structure is provided with' a beveled gear wheel 6. A beveled pinion 7 meshing with the gear-wheel 6 is mounted upon a horizontal shaft which through the Specification of Letters Patent.

Patented'Feb. 27,1917.

Application led August 24, 1915. l Serial No. 47,034.

instrumentality of a gearingS and a pulley 9 is operatively connected with amotor 10.

Mounted upon the upright shaft beneath and inadjaeency to the table 2 is a ratchetwheel 12 which in the operation serves to transmit the rotary movement of the shaft to the bending element of the machine.

This'element consists of a swinging arm 13 which is'pivoted on the shaft 5 beneath 4the ratchet wheel and is slidably supported upon a shelf 14 liXed on the supporting structure beneath the table.

The arm is provided with an upright stud 15 upon which is pivote'd 'a pawl 1G which rests upon'the arm. The'upper end of the stud projecting above the pawl carries an antifriction roller 17 which in the operation of the machine engages the rod to bend a art thereof relative to the body portion inafter to be described. .j

A link 18 positioned above the .pawl and the ratchet'whe'el is pivoted `upon the stud 15 and the shaft' to more firmly maintain the parts in their relative positions, and an arcuated'slot 19 in the table formed concentrically to the upright shaft, guides the roller 17 projecting therethrough, during movement ofthe arm about its pivotal axis.

A holder 20 pivotedl on the shaft 5 between the armv and the table carries at`its end which projects beyond the hub ofthe arm, a pivoted trip 21 which by means of a spring 22 isyieldingly-heldin its normal position. v

. The trip is provided intermediate of its ends with 'a laterally projecting lug 23 which at a determinate point in the rotary movelment of the arm, ,is engaged by a cam 24 projecting laterally from the same.

' TheV pawl 16 has a point l25 adapted to engage with theteethof the ratchet wheel,

Vand'it is'furthermore providedV with a tail 26 which when by engagement of the cam 24 with the lug 23 on the trip, the latter is moved about its pivot, engages an antifriction roller ,27 on the trip for the purpose of disengaging the point of the pawl from the tooth of the ratchet-wheel with which it was in contact.

A handle 28 projecting from the pawl, lis provided for its adjustment to move the point 25 in engagement with the ratchet wheel 12, and coiled

springs

29 and 30 which respectively connect the handle of the pawl with the arm, and the arm 13 with a fastening 31 on the table, serve to automatically return the parts to their original position after the pawl is released from the ratchet wheel by the engagement of its tail with the roller on the trip.

The rod-rest which holds the body portion of the rod in a fixed position during the bending operation, consists or" a slotted plate 32 which is slidably-adjustably mounted upon the table by means of

bolts

33 and 34 extending through its slots, nuts screwed upon the bolts being provided to lock the plate in its adjusted positions.

A stop on the table engages an edge of the plate to hold it against lateral displacement and bolt-holes 36 in the table are pr vided to admit the rearmost bolt 34 when for the purpose of adjusting the position of the bending shoulder hereinafter to be described, relative to the bending roller 15, the

plate is adjusted by moving it pivotally about its other bolt 33.V

r1`he rod-rest has at its forward end an upwardly projecting stationary cheek 37 the end of which provides a shoulder 33 about which'the projecting portion of a rod placed on the rest, is bent by action of the roller 17 on the swinging arm.

A second cheek 39 slidably mounted in a slot of a rib 40 on the rest opposite to and parallel with the stationary cheek 37, is adjustable by means of a pair of screws 41 extending through threaded apertures in the rib and provides in conjunction with the other cheek, a seat 42 to receive the bodyportion of the rod and hold the same against lateral displacement.

The rest is furthermore provided at its rear end with a laterally projecting sleeve 43 in which a plurality of bars 44 are held in place by means of a set-screw 45.

The gage bars have at their forward ends, upwardly proj ecting' prongs 46 which by engagement with a bend previously formed on a rod, establish a predetermined distance between the` said bend and `a second bend to be formed on the rod by action of the swinging upon its portion projecting beyond the shoulder 38.

The trip 21 is adjusted to different positions in a path concentric to the course of travel of the swinging arm, in accordance with the size of the angle to which it is desired to bend the rod, by means of a curved bar 47 which is pivoted at one of its ends upon the pivot-pin of the trip, and which extends slidingly through a guide-slot 48 on the table. V

The bar is serrated at its outer edge and held in its adjusted positions by engagement with a detent 49 which forms part of a pivoted block 50 which rests upon the table. n screw 51 extending through a threaded opening' in a lufy 52 projecting upwardly from the table, engages the block 50 to provide for a limited lateral adjustment of the detent.

1n operation, the movable cheek 39 of the rod-rest is adjusted to a distance from the stationary cheek 37 of the same, slightly exceeding the width of the rod to'be bent. rEhe trip 21 is positioned with relation to the shoulder 38 in accordance with the angle to which the rod is to be bent, by moving the holder 2O about its pivot through the medium of the curved bar 47, and the latter is subsequently locked'in position by engagement with the detent 49.

After the motor 10 has been put in motion to impart a rotary movement to the upright shaft 5, the rod which in Figs. 1, 2 and 6 of the drawings has been designated by the numeral 53, is slid through the seat 42 on the rod-rest until the point at which it is to be bent is in line with the shoulder 38.

The pawl 16 is now moved about its pivot by means ot' the handle 28 to bring its point 25 in engagement with the rotating ratchet wheel 12, withthe result that the arm 13 is swung about its pivot and the roller 17 is compelled to forcibly engage the part of the rod extending beyond the shoulder.

lnasmuch as the body portion of the rod is held against lateral movement in the seat 42, its projecting end is by the action of the wheel.

After the pawl has been released, the

springs

29 and 30 which were expanded during the above described operation, automatically return both the pawl and the arm 13 to their original positions.

The angle at which the rod is to be bent may be varied to substantially any desired degree by the adjustments of the trip and the rod-rest, the adjustment of the detent 49 being provided to secure the trip at any point at which the detent in its normal position would engage a serration of the bar 47 between two of its interdental spaces.

lfhen a number of rods are to be former alike by a plurality of bends, the distances between each bend and a succeeding' one is gaged by placing the rods so that the bends already formed thereon, engage the upright prong on one of the gage bars which previously has been adjusted to the required distance with relation to the shoulder 38. rthe position occupied by the rod has been shown in broken lines at 55 in Fig. 3.

By providing a number of gages as shown in the drawings a number of successive, differently distanced bends may thus be formed on a number` of rods without the necessity of adjusting a gage for each different bend.

Having thus described my rod-bending machine in the best form at present known to me 1 desire it understood that variations in the arrangement and construction Vof cooperative parts of which the machine is composed, may be resorted to within the spirit of my invention as set forthv in the following claims l. A rod-bending machine comprising a support, a bending-shoulder thereon, a pivoted arm having a bending-member to engage a portion of a rod extending beyond the shoulder, a rotary ratchet wheel, a pawl pivoted on the arm for engagement with the ratchet-wheel, and a trip adapted to disengage the pawl from the ratchet-wheel at a determinate point in the movement imparted to the arm by engagement of the pawl with the ratchet-wheel.

2. A rod-bending machine comprising a support, a bending-shoulder thereon, a pivoted arm having a bending-member to engage a portion of a rod extending beyond the shoulder, a driving element having a continuous rotary movement in one direction, a transmission-member adjustable on the arm, to drive the same by engagement with the said element, a trip adapted to automatically disengage the transmission member from the driving-element at a Vdeterminate point in the movement of the arm with the element, and resilient means for returnng'the arm and the transmission-member to their original positions.

3. A rod-bending machine comprising a support, a bending-shoulder thereon, a pivoted arm having a bending-member to engage a portion of a rod extending beyond the shoulder, a driving element having a continuous rotary movement in one direction, a transmission-member adjustable on the arm, to drive the same by engagement with the said element, a trip adjustable to a selected position in a path concentric with the course of travel of the arm, and adapted to automatically disengage the transmission member from the driving-element, and means for securing the trip in its adjusted positions.

4. A rod-bending machine comprising a support, a bending-shoulder thereon, a pivoted arm having a bending-member to engage a portion of a rod extending beyond the shoulder, a rotary driving element, a transmission-member adjustable on the arm, to drive the same by engagement with the said element, atrip adjustable to a selected position in a path concentric with the course of travel of the arm, and adapted to disengage the transmission member from the drivingelement, a toothed bar connected with the of power to the shaft, a toothed-wheel on the shaft, an arm pivoted on the shaft and having a bending member to engage the portion of a rod extending beyond the shoulder, a

' pawl pivoted on the arm to engage s aid toothed wheel, and a trip for disengaging the pawl from the wheel at a determinate point in the movement of the arm with the wheel. l

6. A rod-bending machine comprising a support, a bending-shoulder thereon, an upright shaft, mechanism for the transmission of power to the shaft, a toothed-wheel on the shaft, an arm pivoted on the shaft and having a bending-member to engage the portion of a rod extending beyond the shoulder, a pawl pivoted on the arm to engage said toothed wheel, a trip-holder pivoted on the shaft, a trip on said holder adapted to disengage the pawl from the wheel at a selected point in the movement of the arm with the wheel, and means for securing the tripholder in its adjusted positions.

7 A rod-bending machine comprising a support, a bending-shoulder thereon, an upright shaft, mechanism for the transmission of power to the shaft, a toothed wheell on the shaft, an arm pivoted on the shaft and having a bending-member to engage the portion of a rod extending beyond the shoulder, a pawl pivoted on the arm to engage said toothed wheel, a trip-holder pivoted on the shaft, a trip on said holder adapted to disengage the pawl from the wheel at a selected point in the movement of the arm with the wheel, a toothed rod pivoted on said holder, and a detent for securing said rod in its adjusted positions.

8. A rod-bending machine comprising a support, a bending-shoulder thereon, an upright shaft, mechanism for the transmission of power to the shaft, a toothed wheel on the shaft, an arm pivoted on the shaft and having a bending-member to engage the portion of a rod extending beyond the shoulder, a pawl pivoted on the arm to engage said toothed wheel, a trip-holder pivoted on the shaft, a trip pivoted on said holder and adapted to disengage the pawl from the wheel, and means for securing the tripholder in its adjusted positions, the said trip and the arm having cooperative means which by engagement at a determinate point in the movement of the arm, compel the trip to move into the path of the pawl.

9. A rod-bending machine comprising a support, a bending-shoulder thereon, an upright shaft, mechanism for the transmission and springs for returning the pawl and the arm to their original positions.

n testimony whereof I have eiiXed my signature in presence of two witnesses.

WALKER B. MYERS.

of power to the shaft, a toothed-wheel on the shaft, an aim pivoted on the shaft and having e bending-inemhei to engage the potion of e rod extending beyond the shoulder, a pawl pivoted on the arm to engage said toothed wheel, a trip for disengaging the pawl from the wheel at a deteiniinate point in the movement of the arm with the wheel,

/Vitnesses:

G. J. ROLLANDET, L. RHOADES.

Copies of this patent may be obtained for ve cents each, by addressing the "Commissioner of Patents.

Y Washington, D. C.