US2036405A - Bobbin stripper - Google Patents

Description

H. A. GALE BOBBIN STRIPPER Original Filed June 23, 1933 4 Sheets-Sheet l m m0 H. A. GALE BOBBIN STRIPPER 111:, m with Original Filed June 23/1935 4 Sheets-Sheet 2 E L A G A H BOBBIN STRIPPER Original Fil ed June 2 5, 1333 4 SheetsShet 3 H. A. GALE mM- BOBBIN STRIPPER Original Filed June 25, 3.933 4 Sheets-5heet 4 Patented Apr. 7, 1936 UNITED STATES PATENT OFFICE Application June 23. 1933, Serial No. 677,292

Renewed September 4, 1935 11 Claims.

This invention relates to a machine for stripping yarn from bobbins after they have been used.

The principal objects of the invention are to provide a construction in which all the motions for pushing the bobbin through the strippers, pulling it out of the strippers, discharging it, feeding the bobbin to the strippers, and other operations are performed by the action of a single element, preferably in form of a crank arm, whereby the different operations will be timed positively with respect to each other and there will be no adjustments to make and no danger of the timing getting out of synchronism; to provide a second pair of jaws following the action of the stripping jaws to clear any yarn from the bobbin that may not be removed by the former; to provide operating means for actuating the two pairs of jaws so that they will always work in the proper sequence; to provide means for holding the bobbin down and preventing it from jumping up after it is once fed into stopping position; to provide an improved bobbin feeding device to feed the bobbins in proper position to be dropped, and to provide improved means for receiving and holding the bobbins just before they are pushed through the stripping jaws.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings, in which Fig. 1 is a front elevation of a machine constructed in accordance with this invention;

Fig. 2 is an end elevation of the same, partly in section;

Fig. 3 is a plan;

Figs. 4 and 5 are sectional views on the lines 4-4 and 5-5 respectively of Fig. 1, showing the two cams for operating the jaws;

Fig. 6 is a view similar to Fig. 3 showing the bobbin in the act of being stripped;

Fig. 7 is an enlarged view showing the stripping action on the bobbin;

Fig. 8 is an end view of the same as indicated by the arrow 8 in Fig. 7;

Fig. 9 is a view similar to Fig. 7 showing the stripping action practically completed and the clearing jaws in action;

Fig. 10 is an elevation of one of the clearing jaws as indicated by the line Ill-l of Fig. 9;

Fig. 11 is an end view of the shaft and its operating means for actuating the feeding mecha-- nism;

Fig. 12 is a plan of the feeding hopper;

Fig. 13 is a sectional view on the line l3l3 of Fig. 12;

Fig. 14 is a sectional view of the hopper on the line l4-l4 of Fig. 12, and

Fig. 15 is a sectional View of the other end of the hopper on the line |5l5 of Fig. 12.

The machine is shown as comprising a strong frame l0 and receiving its power through a pulley II which, through a pinion l2, and a gear I3 operates the main shaft I4. This shaft is supported in hearings on the frame and is provided at the end with a crank l5. This crank is connected by a link I6 with a lever l1 pivoted on a shaft l8. The lever has a portion extending beyond the pivot shaft l8 which is connected by a link IS with a sliding block 20.

The lever I! is provided with an arm 2| extending back toward the shaft l4 and at the end connected with a link 22 which is pivotally connected with a yoke 23 on a lever 24 which is 9 pivoted at the bottom to a stationary point on the frame or a bracket thereon. This lever is connected by a link 25 with a slide 26. It may be stated at this point that by this means the crank I5 is made to operate both a pushing and 25 a pulling mechanism, as will appear.

The sliding block 20 is arranged to slide' on stationary rods 2'! carried by the frame and it has secured to it a push rod 28 which has a hollow head 29 preferably of semi-cylindrical shape open at the top for receiving the small or tip end of the bobbin and pushing it forward, as will appear. The push rod 28 is mounted in a guide on the frame so that its motion will be in a straight line and it is further guided by the 35 rods 21'.

The slide 26 is provided with a bracket 30 near the end to which is pivoted a latch 3| having a pin 32. As shown in Fig. 2 this pin rides up on a cam plate 33 when the slide 26 is drawn back 0 and drops off the end of the cam finally so as to come down on the bobbin just back of the head thereof. Then, on the next forward motion of the slide 26, the latch will pull the bobbin out of the stripping mechanism and discharge it by gravity. This action also draws the bobbin through part of the stripping mechanism. The slide 26 is mounted to operate in an opening in the frame, constituting a guide.

Fixed on the rods 21 is a head 35 carrying a spring-pressed plunger 36 which is pivotally connected with a cam lever 31 having cam surfaces on opposite sides. The sliding block 20 is provided with two rolls 38 for engaging opposite sides of the cam lever and operating it. Its course of operation will be observed by comparison of Figs. 3 and 6.

The end 39 of the cam lever 31 engages in a notch in a transverse slide 40 mounted in ways on the frame. Therefore the operation of the sliding block 20 swings the cam lever 31 and reciprocates this slide. On the end the slide 43 is provided with ears 4| which support a pivoted pawl 42. A spring-pressed pin 43 tends to move this pawl into the position shown in Fig. 11. A hopper 44 for the bobbins is provided which supports a shaft 45 provided with a ratchet wheel 46. In stationary position a holding pawl 4'7 is pivoted and provided with a spring-pressed pin 48 for holding this wheel in any position to which it may be turned by the pawl 42 operating with the slide 40.

In the present case the ratchet wheel is shown as having only four teeth so each operation of the slide 40 rotates it a quarter of a revolution. The shaft 45 is provided with a wheel 49 at one end and wheel 50 at the other end. Each wheel is provided with four notches around its circumference. The wheels are both fixed to the shaft and both accordingly work together.

The hopper 44 is made up of two slanting plates 5| and 52, both of which are provided with recesses 53 and 54 in their lower edges to permit any quantity of yarn which may be on the bobbins to pass through without obstruction. Every time the shaft 45 rotates a quarter of a revolution the notches in the edges of the wheels 49 and 50 are presented as shown in Figs. 14 and 15 in a position in which the lower bobbin in the hopper will drop into the notches by gravity. The hopper is provided with a plate 55 at the end to shape the interior surface so that in the lower part only one course of bobbins can be received. Therefore, only one bobbin is deposited in these two notches. At the time that the top notches in the two wheels 49 and 50 receive a bobbin, a bobbin in one of the other pair of notches is dropped down, as shown in Figs. 14 and 15. The butt end of the bobbin is received on a concave surface 56 carried by a plate secured to the frame while the tip end of the bobbin drops into the semi-cylindrical head 29. The wheel 49 is fixed to the shaft 45 while the wheel 50 is adjustably mounted upon it to provide for different lengths of bobbins. The side 52 of the hopper is provided with longitudinal slots 51 along which a plate 58 can be adjusted and secured in adjusted position. This plate really constitutes the end of the hopper and the bobbin is received between this plate and the opposite end of the hopper.

The bobbin having been dropped out of the feeding mechanism into the head 29 and the concave surface 56, as shown in Fig. 13, the parts are so timed that the pusher rod 28 now moves forward and pushes the bobbin into the position shown in dotted lines in Fig. 2.

From what has been said before, it will be seen that at that time the latch 3| is in the position shown in dotted lines in Fig. 2 and that when it moves back to a little beyond the dotted line position, it will be ready to move forward and take the bobbin out.

On the shaft I4 are two cams 68 and Si. Pivotally mounted on the machine frame are two levers 62 and 63, each having a roll cooperating with the cam and operated by it. Each lever is provided with a spring-pressed rod 64 and 65 respectively. These rods both operate in substantially the same way. One of themis pivotally connected with two bell cranks 66 which are pivoted at opposite sides of the machine and the other one is pivotally connected with another pair of bell cranks 6T pivoted in the same way. The bell cranks 6T operate a pair of oppositely reciprocating slides 68 which carry the two stripping jaws 69, of the usual construction. The other two bell cranks 66 are connected with a corresponding pair of slides 10 which are provided with opposite jaws H. The jaws 'H are provided with concave interior oppositely registering surfaces which are roughened or provided with transverse projections so that they can be depended upon to clear off any short pieces of yarn that may be left wound on the bobbin after the bobbin has been pushed through the stripping jaws 69. In Fig. 10 one of these jaws is shown as provided with screw threads to secure the desired roughness but teeth of any other kind can be employed.

In this part of the operation the bobbin first passes through the jaws 69 as shown in Fig. '7. When it gets into the dotted line position the jaws "H come into contact with it and it is pushed through them from the position shown in Fig. 9 to that shown in dotted lines in Fig. 2. This constitutes practically all of the stripping operation, although when the latch 3| pulls the bobbin out as previously described, for the purpose of discharging the bobbin from the machine additional threads of yarn may be removed from the bobbin as the clearing jaws are still in position.

To prevent the bobbin from being vibrated so that it may jump up in the head 29 after it is once deposited in it, the following mechanism is provided. One of the pivot pins 73 which connects the bell cranks 66 and 67 with the slides 10 and 38 is elongated to pivotally connect it with a lever 14, preferably U-shaped, and pivoted at "5. The pin 13 enters a cam slot 16 in this lever to control the operation thereof. As soon as this bell crank, 61 in this instance, starts to swing inwardly, the pin 13 moves in the slot, as indicated in Fig. 14. The pin encounters a rise in the slot and forces the extreme end of the lever l4 down on the bobbin, which has already been deposited in the head 29. This positively holds the bobbin down, so that any vibration of the machine cannot lift the bobbin. For this reason it cannot be jarred out of this head or materially displaced.

In connection with the actual stripping operation itself, it will be seen that the jaws are springpressed so that they are capable of yielding and that by the double action of the two pairs of jaws a complete stripping and clearing of the yarn from the bobbins is provided for. portant feature because with the machines on the market quite a percentage of bobbins are discharged with yarn upon them. In many cases they all have to be inspected and some of them thrown out to be stripped over again. One purpose of this invention is to avoid that additional expense.

All the actions described are operated by the same shaft [4 so that they necessarily take place in the order described and all the actions, except the motions of the jaws are directly actuated by the crank I5 so that there is no danger of their getting out of synchronism after having once been set. At the same time there are sufficient adjustments, by the use of the different screws shown, so that the machine can be set originally as desired for the particular bobbins to be operated upon. The speed of operation can be kept high as the machine does not involve seriously unbal- This is an imanced elements although practically all of the operations are performed by reciprocation.

Although I have illustrated and described only one form of the invention, I am aware of the fact that modifications can be made therein by any person skilled in the art without departing from the scope of the invention as expressed in the claims. Therefore, I do not wish to be limited in this respect otherwise than as set forth in the claims, but what I do claim is:

1. In a bobbin stripping machine, the combination of a main shaft, a crank thereon, a reciprocable bobbin pusher, a slide movable in the same direction as the bobbin pusher and having means thereon for engaging the bobbin under the head thereof and removing it from the machine, a lever, links connecting the opposite ends of the lever with the crank and bobbin pusher, and a link connecting the crank end of the lever with said slide so that said bobbin pusher and said slide will be operated directly from the crank in such order that the means on the slide will engage the head of the bobbin shortly after the bobbin is pushed out int-o position therefor by the bobbin pusher.

2. In a bobbin stripper, the combination of a main shaft, a member thereon, a lever operated directly by the member, a reciprocable bobbin pusher, means operated by one end of said lever for reciprocating the bobbin pusher, a reciprocating slide, a latch on the slide for engaging the bobbin and drawing it out of the machine, and means connected with the lever on the other side of the pivot for operating said slide.

3. In a bobbin stripper, the combination of a main shaft, a crank fixed to the end of said shaft. a link pivoted to the crank, a lever, one end of which is pivotally connected with the link, said lever having an arm projecting beyond its pivot to the side opposite that at which the lever is connected to the link, a second link pivoted to said projecting part of the lever, a bobbin pushing rod connected with said second link to be operated thereby, said lever also having an arm projecting toward the shaft from its pivot, a third link connected with the extreme end of the last named arm, a pivoted lever to which said link is connected, and a slide having a bobbin removing means thereon connected with the last named lever to be operated thereby.

(i. In a bobbin stripper, the combination of a main shaft, a crank fixed to the end of said shaft, a link pivoted to the crank, a lever, one end of which is pivotally connected with the link, said lever having an arm projecting beyonds its pivot to the side opposite that at which the lever is connected to the link, a bobbin pushing rod connected with said lever to be operated thereby, said lever also having an arm projecting toward the shaft from its pivot, and a slide having a bobbin removing means thereon connected with the lever to be operated thereby.

5. In a bobbin stripping machine, the combination of a pair of bobbin stripping jaws and means for operating them, with a reciprocable rod adapted to engage the tip end of a bobbin to push it through the jaws, a slide, a pivotal gravity latch on the slide adapted to engage a bobbin when the bobbin is forced part way through the jaws and pull it out of the jaws by its head upon the motion of the slide, away from the jaws, a cam fixed in stationary position and a pin on the latch adapted to engage and be supported by said cam as the slide moves back until the end of the latch moves beyond the head of the bobbin.

6. In a bobbin stripping machine, the combination of a pair of bobbin stripping jaws, a pair of cleaning jaws having opposite concave roughened surfaces for engaging the bobbin, means for pushing the bobbin through the jaws, means for moving the first-named jaws to engage the yarn on the bobbin and push it off as the bobbin is pushed through them, and means for thereafter moving the cleaning jaws into place behind the first-named jaws.

'7. In a bobbin stripping machine, the combination of a main shaft, means for pushing a bobbin longitudinally, means operated by the main shaft for operating said means, two cams on the main shaft, spring-pressed rods operated by the cams, a pair of bell cranks connected with each cam, said bell cranks projecting to opposite sides of the machine, a pair of bobbin stripping jaws connected with one pair of bell cranks to be operated thereby, and a pair of cleaning jaws having concave surfaces provided with a series of projections in position for engaging the bobbin after the stripping jaws have acted upon it for cleaning away any yarn left by the stripping aws.

8. In a bobbin stripping machine, the combination of a main shaft, a crank thereon, a bobbin pushing rod, means operated by the crank for reciprocating said bobbin pushing rod, a stationary frame on which said rod is guided, a springpressed cam lever pivotally connected with said stationary frame, a head connected with the reciprocable rod and movable with it and provided with a pair of rolls spaced apart for engaging the opposite surface of said cam lever, a slide movable in a direction transverse to the direction of the motion of the rod and connected with said cam lever to be operated thereby in accordance with the action of the rolls on the cam lever, and a bobbin feeding device connected with said slide to be operated thereby.

9. In a bobbin stripping machine, the combination of an intermittently rotating shaft, a pair of wheels on said shaft, one of them being adjustable along the shaft, said wheels having depressions in their surfaces for receiving the head and tip ends respectively of the bobbins to be stripped, a hopper having means for feeding the bobbins into a position to be received in said depressions, a concaved surface below one of the wheels for receiving the head of the bobbin, and a push rod having a head of semi-cylindrical type open at the top for receiving the tip end of the bobbin and located under the other wheel.

10. In a bobbin stripping machine, the combination of a shaft, a pair of wheels on said shaft, said wheels having depressions in their surfaces for receiving the head and tip ends respectively of the bobbins to be stripped, a concaved surface below one of the wheels for receiving the head of the bobbin, and a push rod having a head of semicylindrical type open at the top for receiving the tip end of the bobbin and located under the other wheel.

11. In a bobbin stripping machine, the combination of an open topped hollow head for receiving the end of a bobbin, a pair of stripping, jaws, means for moving. the jaws toward the bobbin, a movable lever having a cam slot, and means engaging said cam slot and operating said movable lever to hold the bobbin in place while the jaws move inwardly.

HENRY A. GALE.

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