US1794217A

US1794217A - Wire-tying machine

Info

Publication number: US1794217A
Application number: US309396A
Authority: US
Inventors: John L Vaughn
Original assignee: Gerrard Co Inc
Current assignee: Gerrard Co Inc; GERRARD COMPANY Inc
Priority date: 1928-10-01
Filing date: 1928-10-01
Publication date: 1931-02-24
Anticipated expiration: 1948-02-24

Description

Feb. 24, 1931*. J. L.. VAUGHN WIRE TYING MACHINE Filed Oct. l. 1928 5 Sheets-Sheet l ...ifa

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John L. Vall Feb. 24, 1931. J, L VAUGHN 1,791r,21r`3I WIRE TYING MACHINE Filed Oct. l. 1928 3 Sheets-Sheet 2 Feb. 24, 1931.

J. L. VAUGHN WIRE TYING MAQHINE- Filed Got. l, 1928 J0/27Z l. Vaag/272 gj @Wwfmwm 3 Sheets-Sheet 3 Patented Feb. 24, 1931 UNITED STATES PATENT4 OFFICE JOHN L. VAUGHN, or creano, ILLINOis, AssIeNOn To THE onnRAnn comzPANxlNo., or omcAoo, ILLINOIS, A CORPORATION OF DELAWARE WIRE-TYING MACHINE Application med october 1, 192s. serial No. 309,396.

The present invention pertains to automatic wire tying machines of the type in which the wire is tensioned, twisted and cut in successive operations. y

One Object of the invention is to provide a machine of the type described whichwill effect a predetermined number of twists in the wire upon one throw of the hand lever but may be so operated with the lever as to effect as many additional twists as desired before the cutting takes place.

Another object is to provide such a machine in which the movement of the hand lever in causing the tensioning, twisting and cutting operations is reduced to a minimum.

Still another object is to provide such a machine in which the hand lever, which causes the tensioning to take place when moved in one direction and the twisting to take place when moved in the opposite direction, is relieved of all resistance from the tensioning mechanism after the wire has been tensioned and is being twisted.

Still another object is to' provide such a machine in which the cutter blades are pivoted in front of the line of cut and sheer toward the rear ends of the slots in the holding okes.

y Still another object is toI provide such a machine in which the holding yokes are shiftable toward and away from each other to shorten the twist when ne wire is used and are readily removable without disturbing the cutters to permit replacement with yokes having narrower slots for the wire.

Numerous other objects and advantages will be evident to those skilled in the upon a :full understanding of the construction, a1'- rangement and operation of the imprcved wire tying machine.

One form of the invention is presented herein for the purpose of exemplification, but it will of course be a kpreciated that the invention is susceptible o embodiment in other 45 structurally modified forms coming equally within the comprehensive scope of the claims.

In the accompanying drawings:

Fig. l is a plan view of a wire tying machine embodymg the several features of the invention;

Fig. 2 is a front view of the same;

Fig. 3 is a horizontal section, taken on the line 3 3 of Fig. 2;

Fig. 4 is a vertical section, taken on the line 4 4 of Fig. 2;

Fig. 5 is a"vertical section, taken on the line 5-5 of Fig. 2;

Fig. 6 is a vertical Sectio line 6--6 of Fig. 2; and i Fig. 7 is a planview of the wire twist produced by the machine.

The machine shown in the drawings includes a wire tensioning mechanism, a wire twisting mechanism and -a wire cuttting mechanism, which instrumentalities are operated in the order mentioned by the manipu-k lation of a single hand lever. .In the starting position of the machine, the hand lever is in the forwardly oblique position shown. Vhen the hand lever is swung rearwardly from that position, the tensioning mechanism functions, and, when it is swung forwardly from its rearmost position, irst the twisting mechanism, and then the cutting mechanism, functions.

The hand lever consists 'of two side arms 10 which are connected at.their outer ends by a handle 11 and are secured at their inner ends to a shaft 12 which is journaled in two spaced bearing brackets 13 'attached to a iiat generally rectangular base plate 14. The hand lever is limited in both its forward movement and its rearward movement by lugs 15 on the inner ends of the arms 10 which engage with front and rear stops 16 on the brackets 13.

The tensioning mechanism consists of two rearwardly converging shafts 17 which are journaled in bearing brackets 18 attached to taken on, the

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jacent the front ends of the same, and carry springs 23 which press against arms 24 which are pivoted to and extend downwardly from the front ends of the shafts. The arm 24 on the left side of the machine carries an arc-- shaped wire guiding block 25 which is concentric with respect to the axis of the shaft on which the arm is pivoted and is provided with a notch 26 into which one end of the.

wire to be tensioned is hooked after being reversely bent to fit the notch. The arm 24 on the right side of the machine carries a similarly shaped and arranged wire guiding block 27, and also carries a spring-pressed wire gripping cam 28 which acts on the other end of the wire against a lip 29 on the arm and is provided with a finger piece 30.

When the tensioning shafts 17 are rotated by the means above described, the lower' ends of the resiliently yieldable arms 24 to which the ends of the wire are fastened move away from each other and place the loop of wireencircling the object to be tied under tension, the amount of which tension is determined by the resistance to compression of the springs 23. When the hand lever, in being swung rearwardly to tension the wire, reaches its rearmost position, projections 31 on the lower ends of the arms 19 ride behind shoulders 32 on rearwardly spring pressed latches 33 which are pivoted at 34 to the base plate 14, whereupon the arms 19 are held against return movement and the cams 21 are relieved from the pressure of the rollers 20. After the twisting operation has been completed and the cutting operation is being performed,

which occurs when the hand lever approaches its foremost position, studs 35 on the inner ends of the arms 10 engage with slides 36 which are pivoted at 37 to the inner ends of the latches 33 and retract the shoulders 32 on the latches out of engagement with the projections 31 on the arms 19. The shafts 17,

after being released in the manner just described,are returned to their normal positions again by springs 38, being controlled in their return movement by supplemental cams 39 on the inner ends of the arms 10 which engage with the rollers 20 and allow the shafts 17 to reach their normal positions only when the hand lever has been swung upwardly after the cutting operation into its normal forwardly oblique position.

The twisting mechanism consists of a radially slotted twisting pinion 40 'through which the ends of the wire to be twisted extend in lapped relation. The pinion isprovided with slotted end trunnions 41 which are journaled in slotted bearing members 42, and the bearing members are detachably secured to the base plate 14 at the center of the front of the same. Two slotted wire holding yokes 43 are detachably secured to the base plate 14 at opposite sides of the bearing members. The yokes 43 prevent the lapped ends of the wire from turning beyond those points during rotation of the twisting pinion, and may be shifted toward or away from the pinion to vary the closeness of the twist in the wire to the extent desired, being secured to the base plate by screws 44 which extend downwardly through apertures 45 which are elongated in the direction of adjustment. The pinion 40 is rotated by a gear 46 which is journaled on the shaft 12 and is rotated in one direction when the hand lever is swung forwardly by an outwardly spring-pressed pawl 47 which is pivoted at 48 to an arm 49 secured to the shaft 12 and engages with any one of several studs 5() on one side of the gear.' The gear is prevented from rotating in the opposite direction by means of an inwardly'spring-pressed pawl 51 which is pivoted at 52 to a bracket 53 attached to the base plate and engages with any one of the studs 50. When the hand lever is swung from its rearmost position to its foremost position,

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two complete twists are imparted to the over- ,A

lapped ends of the wire by the twisting pinion. If three or more complete twists are desired, it is merely necessary to swing the hand lever rearwardly and then-forwardly again before it has reached its fully forward or cutting position on the first stroke,`where upon either one or two additional twists may be imparted on the second stroke depending upon the extent to which the hand lever is swung rearwardly before being swung forwardly. I

The cutting mechanism consists of two stationary blades 54 which are attached to and project forwardly from the brackets 13-into positions alongside the yoke's 43, and two upwardly spring-pressed blades 55 which are pivoted at their front ends to the sides of the front ends of -the blades 54 and extend rear wardly at an upward inclination between'the blades 54 and the stationary guides 56 attached to the blades 54. The blades 54 are slotted beneath the lower edges of the blades 55 in register with `the slots in the yokes 43 and receive the lapped ends of the wire extending through the yokes. The lower edge of the blade 55 at the left side of the machine is so shaped as to cut only the rearmost strand of wire, while the lower edge of the blade 55 at the right side of the machine is so shaped as to cut only the front strand of wire. At the completion of the twisting operation, the

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/ 1,194,a rr' rear ends of the blades are depressed by lugs 57 on the inner ends of the arms l0 and the ends of the wire fastened to the tensioning arms 24 are cut ofi', producing a finished twist such as that shown in Fig. 7. The pivotal connections between the blades 54 and 55 consist of bolts 58 which, because of their accessible positions, may be conveniently tightened .or loosened to adjust the sheering action of the blades.

The operation of the machine, briefly summarized, is as follows:

The machine is placedv upon the box or other object to be bound with wire, and the hand lever, if not already in the forwardly oblique position shown in the drawings, is swung into that position to place the various mec,1 -.anisms in their normal positions. One end of the wire to be tied is hooked into the notch 26 in the wire guiding block 25 at the left side of the machine and is passed under such block through the aligned slots in the cutting blades 54, the holding yokes 43 and the twisting pinion 40. From the slot-s the wire is passed around the object, back through the slots again, and then under the wire guiding block 27 at the right side of the machine intoengagement with the gripping cam 28. The machine is then held firmly by a conveniently arranged handle 59 attached to the left side of the base plate 14, and the hand lever is swung into its rearmost position, causing the overlapped ends of the wire to be drawn in opposite directions to properly tensionthe loop of wire about the object. lVhen the hand lever reaches its rearmost position,the latches 33 interlock with the projections 31 on the arms 19 to hold the tension on thewire and relieve the cams 21 on the inner ends of the arm 10 from further duty. The hand lever, being then free from the resistance offered by the tensioning mechanism, is swung forwardly, and the pawl 47, which assumes the dotted line position shown in Fig. 5 in the rearmost position of the hand lever, engages with one of the studs 50 on the gear 46, rotates the gear, and causes the pinion 40 to impart two complete twists to the overlapped wire portions between the yokes 43. The twisting operation is completed just before the hand lever reaches its foremost position, and, when the hand lever is swung through the last part of its forward movement, the lugs 57 on the inner ends of the arms 10 depress the real.l ends of the blades 55 and sever the excess portions of the wire fastened to the tensioning arms 24. The last part of the forward movement of the hand lever, in addition to effecting the cutting operation, brings the studs 35 on the inner ends of the arms 10 into engagement with the slides 36 connected with the latches 33, causing the latches to release the projections 31 on the arms 19 and allow the arms 24 to return to their normal positions. Should more than two complete twists be desired in the wire, it is merely necessary to swing the hand lever back again after the twisting operation and before the cutting operation, whereupon one or more additional twists may be made inthe wire before the hand lever is swung into its foremost position to effect the cutting operation.

I claim:

l. In a wire tying machine, a wire twisting pinion, means for rotating the pinion, and two wire holding okes which are arranged at opposite ends of, the pinion and are shiftable toward or away from the pinion whereby to vary the closeness of the twist.

2. In awire tying-machine, a wire twisting pinion, means for rotating the pinion, two wire cutting blades which are arranged at opposite ends of the pinion, and two wire holding yokes which are positioned'alongside the blades and may be readily removed without disturbing the blades.

3. In a wire tying machine, a tensioning mechanism, a twlstlng mechanism, a cutting mechanism, and a smgle hand lever for operating all of said mechanisms, said lever extending obliquely forward in the normal position o the various mechanisms and being movable first rearwardly and then forwardly to effect the tensioning, twisting and cutting operations.

4. In a wire tying machine, a twisting mechanism, a cutting mechanism, a hand lever for o erating said mechanisms, and connec- I tions etween the hand lever and said mechanisms which cause the twisting mechanism to operate when the lever is moved through one angle and the cutting mechanism to operate when the lever is moved through another angle and which permit the lever tobe moved two or more times through the first or twisting angle before being moved through the cutting angle, whereby to impart as many twists as desired to the wire. y

5. In a wire tying machine, a frame, a wire twisting pinion, means for rotating the pinion, two wire cutting blades which are arilo ranged at opposite ends of the pinion and v are pivotally mounted at their front ends to the frame to sheer rearwardly, and means for moving the blades.

6. In a wire tying machine, a slotted wire twisting pinion, two slotted wire holding yokes at opposite ends of the pinion, two shafts at opposite sides of the yokes, means for rotating the shafts in opposite directions,`

a single hand lever movable in one direction -to operate` the tensioning mechanism and the hand lever of resistance from such mechanism during the subsequent operation ofl the twisting mechanism In testimony whereof I have hereunto subscribed my name.

JOHN L. VAUGHN.

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