US3008494A - Transverse pile wire loom - Google Patents

Description

Nov. 14, 1961 HJ. SMILEY TRANSVERSE PILE WIRE LOOM 4 Sheets-Sheet l Filed Aug. 16, 1960 mbv |N`vENfroR= HARRY J. SMILEY ,An'llll'itk l ATTY.

Nov. 14, 1961 H. J. SMILEY TRANSVERSE PILE WIRE LOOM 4 Sheets-Sheet' 2 Filed Aug. 16, 1960 A vor. @www Q .MOC

Nov. 14, 1961 H. J. SMILEY k 3,008,494

TRANSYERSE PILE WIRE LOOM 4 Sheets-Sheel'. 3

Filed Aug. is, 1960 FIGS.

Ff@ E INvcN-ron: HARRY J. SMILEY l Bv H. J. SMILEY TRANSVERSE PILE WIRE LOOM 4 Sheets-Sheet 4 .SOC

HARRY J. SMILE? Nov. 14, 1961 Filed Aug. 1e, 1960 United States Patent() 3,008,494 p TRANSVERSE PILE WIRE LOOM Harry J. Smiley, Glasgow, Va., assignor to James Lees fand Sons Company, Bridgeport, Pa., a corporation of Delaware Filed Aug. 16, 1960, Ser. No. 49,973

4 Claims. (Cl. 13942) f 'carrying needle described in my previous application has been found to be of great Iadvantage -in the operation of inserting and withdrawing the pile wires. The present disclosure carries forward this concept anddescribes my improved scroll drive in conjunction with a conventional wire motion on a carpet loom.

The principal object of the invention, therefore, is -to provide an improved drive mechanism for the wire motion ona pile fabric loom. p A furtherfobject of the invention is to provide an improved wire motion on a pile fabric loom utilizing a walking beamcarrying a double scroll sheave which oscillates back and forth on a pair of racks.

v A further object of the invention is to provide an improved wire motion in which the velocity of the wires is` carefully controlled at all times to permit dwell at one end of the stroke.

A further object of the invention is to provide a wire motion for a carpet loom having a double scroll drum mounted on a shaft concentrically with two pinions, a

i pair of'horizontal racks with which the pinions mesh,

` wires in accordance with conventional practice.

' FIGUREl is a top View of a part of a transverse wire A pilev fabric loomshowing the wire motion incorporating the present invention, I

" FIGUREZ is a front view of a'part of the structure ofFIGURE 1, Y v,

FIGURE 3 is a top view of the remainder of the wire motiondriveof FIGURE l', I

FIGURE 4 is a front view Aof theV structure of FIG- URE,3, y i

,FIGURE 5 is an enlarged fragmentary detail as seen at 5-5 of FIGURE 4 showing the mounting for one of the pulleys over which the cable passes,

p FIGURE 6 is an exploded view showing an adjustable mounting for the rack rail, t

FIGURE 7 is Van enlarged transverse section as seen at 7-7 of FIGURE 4, Y y

' FIGURE 8 is a section as seen lat 8-8 of FIGURE 7,

FIGURE 9 is a section as seen -at 9 9 of FIGURE 7, FIGURE 10 is an enlarged sectional det-ail as seen at 10-@10 of FIGURE7,

lFIGURE ll is an enlarged detail las seen at I11-'11 of FIGURE 4, and

FIGURES 12-11'4 are diagrammatic views of the double drum and its relative positions on the racks during selected parts' of the cycle. The term wire motion may be'used to include the entire assembly for controlling the insertion I'and Withdrawal of the pile wires, but in the present description, it ispreferred to separate the' driving mechanism from the actual motion itself which comprises an oscillating hopper platehaving the function of grasping individual pile ICC Wires Iand inserting them separately into the shed and then withdrawing the rst wire of a series of Wires from the fabric in preparation for the next subsequent insertion.

Referring now more particularly to the drawings, the drive mechanism for the wire motion of a transverse wire pile fabric loom constructed in accordance with the present invention comprises a frame'assembly 13 which is mounted on posts 14, 15 substantially at right angles to the path of travel of the hopper plate 16. Driving connections `for the wire motion are achieved through the loom shaft 17 which is extended to terminate in a crank 18 between and in line with the posts 14, 15. However, the precise angle and location of the posts 14, 15 is immaterial insofar as the Wire motion is concerned and the hopper plate velocity control .mechanism may therefore berlocated in any position on the mill floor to which suitable driving land timing connections to the loomv can be established.

The hopper plate 16 oscillates horizontally on the wire table 19 to insert and withdraw pile formingI wires W, 'W from the shed of aV fabric F being woven; The

Warp yarns o-f the fabric are shown schematically at 20 in FIGURE l, the fell of the fabric at 21, 'and the nished fabric at 22. The pile Wires W, W are used in a set of wires shown at 23 inserted in the shed of the fabric and having pile yarns selectively woven over the The mechanism illustrated herein -for controlling the pile Wires and withdrawing the leading wire and then re-inserting it at thev back of the set 23 comprises in addition to the hopper plate 16 a wire holder 24 mounted onthe hopper plate and a wire hook 25 pivotally mounted on the hopper plate and having `a latch which engages in a recess on the head l26 of each wire. The hopper plate is provided with the conventional wire hook throw-out 27 and hopper pawl spring 28 and hopper brake spring 29` as shown in FIGURES l and. 2. Theconventional wire slide 30 is pivoted at 31 and oscillates back and forth to and from the broken line position shown in FIGURE l to the retractlng position shown in full lines. When the hopper plate is all the way to the vleft in FIG- URE l after the insertion of la pile wire with the wire slide in the upper position, the wire slide pivots to the full linel position and the wire hook engages the wire in set 23 nearest to the front of the loom whereupon it is completely withdrawn by the righthand movement ofthe hopper plate whereupon the wire pivots to the'b-roken line position and the Wire is again inserted `at the back of set 23. The wires of the set 23 are held and retained in position in the conventional wire box 32. The hopper plate is controlled |by two cables 37 and 38, one

end of each cable being anchoredin the cable holder 39.

The retracting cable 37 is trained over a sheave 40, thence around a sheave 41 journaled on an `adjustable angle member 42, and 4bracket 43 welded to support 14 (FIG. 4). From thence cable 37 passes around a oating sheave 44 which is pivotally mounted on a bracket 45 (FIG. 5). The saddle 46 for sheave 44 is free to turn pivotally in bracket 45 on bearing 47 to which it is securedl by means of lock nuts 48. The bracket 45 is also free to slide axially on shaft 50 as well as to rotate around' the center of shaft 50. For this purpose the bracket is secured to a pair of bearing elements Slandy 52 having a series of `bearings 53 which permit rotary oscillation and sliding of the elements 51 and 52. Shaft 50 is secured in a bracket 55 by means of collars 56, 56

' and setscrews 57, 57. The bracket 55 is in turn secured to support 15 through angle 58. The construction det 3 are induced by the .change in position of cable 37 when it is wound and unwound from the double drum 60. As will -be seen (FIG. 7), the cab-le 37 is anchored in the drum 60 by means of two capscrews 61, 61.

The advancing cable 38 is carried from cab-le holder 39 `over and around sheave 64, then over sheave 65. Both of these sheaves 64 and 65 are journaled in brackets 66, 66 secured to the underside of wire table 19. From thence the cable 38 is trained around a sheave 67, journaled on frame element 69, and the cable then passes to the opposite side of drum 60 to be anchored by the bolts 6s, 68 (FIG. 9).

The double drum 60 carries peripheral vgrooves 70 for accommodating each of the cables 37 and 38. In order to control the velocity of the hopper plate and to provide a suitable dwell when it is retracted, several convolutions of the groove 70 on each side of the drum are formed around a relatively smaller diameter of the drum hub 71. A scroll section 72 and 73 on each side of the drum transfers the cables from the hub diameter to the larger peripheral diameter and vice versa as is shown clearly in FIGS. 8 and 9.

The drum 60 is rigidly keyed to a shaft 74 by means of a key 75. A pair of pinions 76 and 77 are in turn keyed at the termini of shaft 74 'by means of keys 78 and 79 respectively. The shaft is journaled in a bifurcated yoke 80 of walking beam 81 as shown in FIG. 7, and suitable thrust washers 82 and 83 provide an antifriction contact between the ends of hubs 71 and the inner-faces of yoke 80. Pinions 76 and 77 mesh with a pair of racks 85 and 86 which are in turn secured to the rails 87 and 88 by means of bolts 89, 89. Under control of the movement of walking Ibeam 81 the drum 60 travels in a substantially horizontal path across the racks 85 and 86 to wind and unwind the cables 37 and 38 from the periphery of the drum. The rails 87 and 88 are adjustably :anchored in supports 14 and 15 by means of saddle blocks 90, 91, 92, and 93 two of which are shown in detail in FIG. 6. The termini of rails 87 and 88 are formed with welded plates 95 and 96 and provided with horizontal slotted apertures 97, 97. The plates 95 and 96 are adjustably anchored in cooperating sockets 98 and 99 which are in turn an integral part of a weldment 100 secured to the frame members 14 and 15. Each socket 98 and 99 is provided with four adjusting screws 101, 101 which permit complete control of the lateral positioning of the rails 87 and 88. When the screws 101 have been properly adjusted, each one may be locked with its associated lock nut 102 and then the plates 95 and 96 can be securely bolted through apertures 97, 97; 103, 103. The structure of the elements 90 and 91 is identical to that of 92 and 93 and repetition in connection therewithis therefore unnecessary.

Referring now more particularly to FIGURES 4, 6, and 7, the mechanism for actuating and controlling the movement of drum 60 will be more fully described. Loom shaft 17 is journaled in a pillow block 105 and is provided with the crank 18 at its outboard end. Crank 18 is connected -to the center of walking beam 81 by means of a rod 106 which is Iadjustable at 107 and can be locked in any adjusted position by means of a lock nut 108. Walking beam 81 is pinned at 110 to a link 111 which is in turn journaled at 112 in a pedestal 113. A second link 114 is journaled to the walking beam at 115 which is the journal for connecting Vrod 106. The other end of link 114 is journaled in a pillow block 116 secured to frame member 117 by means of bolts 118, 118. Link 114 is pinned to a shaft 120 in pillow block 116 by means of a pin 121. I-t will be observed that the distance from the center of shaft V120 to pin 115 is equal to the distance from the center of shaft 115 to the center of shaft 74. This relationship insures that each pinion 76 and 77 constantly remains in mesh with its associated rack 85 and 86 throughout the travel of the drum between the racks. Rotation of shaft 17 imparts la modified simple harmonic motion to the drum as it travels from one end of the racks and 86 to the other. The geometry of the linkage system, particularly the location and length of link 1111 and pedestal 113, are designed .to provide the preferred velocity curve for the drum60 during its travel.- .A1so, limited adjustment of the dead center position of crank 18 can be made by means of suitable setscrews 122, 122 and lock nuts 123, 123. Y

In operation, movement of drum 60 back and forth along the racks 85 and 86 under control of the walking beam 81 produces the correct timing and controlled velocity for the insertion of pile wires W, W into the fabric. Furthermore, the use of the rack and pinion driving elements for drum 60 permits much greater travel than would otherwise be possible except for the use of a drum having far greater diameter and therefore far greater inertia forces to be overcome. The importance of this advantage will be appreciated when it will be understood that the present wire motion can be employed on carpet looms capable of producing carpet 18 feet in width. With the drum 60 -in the position shown in FIGS. 1, 3, and 4, cable 37 is wound around one side ofthe drum, both in the hub portion 71, the scroll portion 73, and the peripheral grooves 70. Cable 38 however, is payed out and is trained over a small portion of the huh of the drum as shown in FIG. 9 because the wire is fully withdrawn or retracted 'from the warp shed. As the drum is urged to the right, as seen in FIG. 4, it immediately rotates in a clockwise direction due to the action of pinions 76 and 77. This rotation of the drum slowly unwinds cable 37 from its side of the drum 60 and con. currently winds cable 38' around the hub of its side of the drum. The rate of winding and unwinding of the two cables fromY the drum is at all times equal. The hopper plate then moves towards the warp shed but at a slower velocity than would be the case if both cables 37 and 38 were wound around the outer periphery. of the drum. However, after sever-al turns which permit suflicient time for changing the sheds, the cables reach the scrolls 72 and 73, whereupon they -are immediately transferred to the periphery of the drum and therefore rapidly accelerate the movement of the wire into the shed. When Ithe crank 18 is turned 180, the drum is, of course, at the opposite end of racks 85V and 86. In this position both cables 37 and 38 extend tangentially from the .periphery of drum 60 but in oppositevdirections. This is shown to the right in FIGURE 12. Upon reversal of the direction of the drum (that -is from right to left in FIG. 4) cable 37 winds rapidly and cable 38 unwinds rapidly thus withdrawing the wire from the shed at high velocity. However, since a change of direction is involved, the velocity of the drum cables Vand Wire must pass through 0 at the reversing position. This transition, however, is made rapidly since the cables are operating from the larger drum periphery. As the wire is thus quickly retracted from the shed, the point is reached at which the cables are transferred from the outer diameter to the hub diameter which, of course, occurs after the tip of the wire W has been removed `from the warp sheds. This transfer of the cables immediately decelerates the wire velocity from the peripheral velocity to hub velocity. Further, deceleration, of course, -is provided by the crank 18V as i-t approaches the opposite dead center position before reversal of direction.

FIGURE 12 shows the two extremeY moved positions of drum 60 and illustrates thevariation in travel path of the cable in a horizontal plane thus indicating the importance of the oating mount for pulley 44. FIG- URE 13 is a schematic View which shows the comparison between the linear positions of the drum 60 on the whole racks when the cable is operating from either the hub diameter or the peripheral diameter of the drum and also during the time that the cable is -being trans` ferrel from one diameter to the other. In the low velocity dead center position, the drum is centered at 150. The center of the drum moves horizontally to a point shown at 151 with the cable operating in the hub grooves. The .drum travels horizontally from point 151 to point 152 during the transfer of the cable from the hub to the periphery. From point 152 to 153 the cable is operating at high velocity from the periphery and until the drum returns to station 152 when the sequence reverses. The comparison between the tilting of pulley 44 as shown in FIGS. 13 and 14 shows how the floating mounting of this pulley compensates additionally for the change in elevation of the cables 37 yand 38. Since the cables during one period of the cycle operate from the drum periphery and during `another period of the cycle they operate from the hub periphery, this change in elevation requires a oating mount for pulley 44 which is the pulley located nearest to the drum.

It will thus be understood that I have provided an eX- tremely efficient wire motion for a fabric loom. The use of a double rack and pinion is important in eliminating the necessity for greater cable length, larger drum diameter, greater inertia forces, and greater space requirements. The device is flexible insofar as its installation on the loom is concerned and may be mounted at right angles to the wire table as shown, or may, if desired, be mounted parallel thereto. Provided `a suitable `driving connection for the drum is present, any intermediate angular mounting may also be employed. The mounting of the pulleys, particularly pulley 44, cooperates to reduce the length of cable and space required.

Having thus described my invention, I claim:

l. A wire motion for a transverse wire pile fabric loom comprising a reciprocating hopper plate for carrying pile wires into the shed of a fabric being woven, a wire slide for guiding said pile Wires, a retracting cable anchored at one end to the hopper plate for linearly oscillating said hopper plate in one direction, an advancing cable anchored at one end to the hopper plate for linearly oscillating said hopper plate in the opposite direction, a cable drum having a small diameter periphery and a relatively larger diameter periphery for controlling each of said cables, means for anchoring the other end of each cable to said drum, means for transferring each of said cables to and from its associated small and large diameter drum peripheries, a shaft keyed to said drum, a pinion keyed to each end of said shaft, a rack positioned to mesh with each of said pinions, a framework for supporting said racks, a walking beam for oscillating the drum and pinions along said racks, a driving connection for said walking beam, and a plurality of sheaves for guiding the cables from the hopper plate to opposite sides of said drum.

2. Apparatus in accordance with claim 1 having a plurality of links connected to the walking beam for maintaining the meshing relationship between the pinions and the racks.

3. Apparatus in accordance with claim l in which at least one of the sheaves is provided with a oating mount permitting the sheave 'both linear and rotational movement.

4. Apparatus in accordance with claim 1 in which the framework is provided with adjusting means for the racks.

References Cited in the tile of this patent UNITED STATES PATENTS 960,211 Whitmore May 31, 1910 2,258,191 Payne Oct. 7, 1941 2,890,725 Brannock lune 16, 1959 FOREIGN PATENTS 12,301 Great Britain 1908

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