US3761028A

US3761028A - Automatic spindle-exchange apparatus on textile machinery

Info

Publication number: US3761028A
Application number: US00109886A
Authority: US
Inventors: S Torii; H Ishikawa
Original assignee: Torii Winding Machine Co Ltd
Current assignee: Torii Winding Machine Co Ltd
Priority date: 1970-10-19
Filing date: 1971-01-26
Publication date: 1973-09-25
Anticipated expiration: 1990-09-25
Also published as: FR2098046A5; DE2144321A1; GB1352177A; DE2144321B2; JPS4943755B1; DE2144321C3

Abstract

Improved thread transfer mechanism of an automatic spindleexchange apparatus of a turret-type yarn winder provided with a pair of bobbin supporting spindles symmetrically arranged with respect to a common turret shaft. The thread transfer mechanism comprises an articulated thread guide means for leading the thread between a full packaged bobbin to a catch means formed at a free end of the spindle holding an empty bobbin when it is required to exchange spindles for taking up the thread delivered from its supply source from the full packaged bobbin to the empty bobbin.

Description

United States Patent 1191 Torii et a1.

[451 Sept. 25, 1973 AUTOMATIC SPINDLE-EXCI-IANGE APPARATUS ON TEXTILE MACHINERY [75] Inventors: Soichi Torii, Kita-ku, Kyoto-shi,

Kyoto; Haruyoshi lshikawa, Ukyo-ku, Kyoto-shi, Kyoto, both of Japan [73] Assignee: Torii Winding Machine Co., Ltd.,

Kyoto, Japan [22] Filed: Jan. 26, 1971 [21] Appl. No.: 109,886

[30] Foreign Application Priority Data 061. 19, 1970 Japan 45/91515 [52] us. Cl 242/18 A 1 [51] Int. Cl B65h 54/00 [58] Field of Search 242/18 A [56] References Cited UNITED STATES PATENTS I 3,604,642 9/1971 Hirst 242/18 A 2,772,054 11/1956 Herele et 31.. 242/18 A 3,109,602 ll/l963 Smith 242/13 A 3,279,709 10/1966 Carlson et a1 242/18 A UX 3,378,21 l 4/1968 Nuissl 3,521,826 7/1970 Schmick 242/18 A 2,266,121 12/1941 Kinsella et a1. 242/18 A UX 3,034,736 5/1962 Rhein, .lr 242/18 R 3,355,117 11/1967 Gerhardt et a1. 242/18 A Primary Examiner-Stanley N. Gilreath Assistant Examiner-Milton Gerstein Att0rneyRobert E. Burns and Emmanuel J. Lobato 5 7 ABSTRACT Improved thread transfer mechanism of an automatic spindle-exchange apparatus of a turret-type yarn winder provided with a pair of bobbin supporting spindles symmetrically arranged with respect to a common turret shaft. The thread transfer mechanism comprises an articulated thread guide means for leading the thread between a full packaged bobbin to a catch means formed at a free end of the spindle holding an empty bobbin when it is required to exchange spindles for taking up the thread delivered from its supply source from the full packaged bobbin to the empty bobbin.

5 Claims, 7 Drawing Figures PATENTED SEP25|973 SHEEI 3 0F 5 PATENTEDSEPZSIHH SHEEI t [If 5 v ui AUTOMATIC SPINDLE-EXCHANGE APPARATUS ON TEXTILE MACHINERY BRIEF ILLUSTRATION OF THE INVENTION The present invention relates to an improved automatic spindle-exchange apparatus on textile machinery such as a yarn winder, and more particularly relates to an improved thread-transfer mechanism of the auto matic spindle-exchange apparatus provided with a pair of bobbin-supporting spindles symmetrically arranged with respect to a common driving shaft so that the spindles are alternately connected to the common driving shaft in such a way, that the spindle holding an empty bobbin in a stand-by position comes to a working posi' tion when one of the bobbins is fully packaged, and the spindle holding the fully packaged bobbin is removed to the stand-by position while the thread is fed from a supply source at a constant speed. In the abovementioned illustration, thread, represents textile yarn of any type such as monoor multi-filament yarn, spun yarn, or synthetic film yarn or rope or metallic yarn etc. An apparatus and method for automatically exchanging a full packaged bobbin on a spindle with an empty bobbin on another spindle without any interruption of the yarn winding operation on a yarn winder is disclosed in detail in a co-pending patent application Ser. No. 4,243. In the above-mentioned apparatus, the spindles are connected to a differential gear driven by a torque motor which changes its rotation speed in accordance with the winding tension of yarn which is wound about a bobbin supported by one of the abovementioned two spindles. The above-mentioned spindleexchange mechanism and yarn winder are hereinafter referred to as a turret-type winding mechanism and a turret-type yarn winder, respectively.

Therefore, the present invention relates to an imrpoved thread transfer mechanism of the turret-type winding mechanism of a yarn winder.

Before the illustration of the present invention, it is convenient to illustrate a method of exchanging spindles for winding a yarn. According to the abovementioned copending patent application, when the spindle-exchange operation is commenced, the yarn is still delivered from its supply source at a predetermined constant speed. Taking-up motion of the abovementioned yarn is transferred from a full packaged bobbin to a fresh bare bobbin without wasting the yarn and stopping the winding operation thereof. The rotation speed of the spindle is adjusted by controlling the rotation speed of the torque motor which is controlled in accordance with the tension of the winding yarn. When a package formed about a bobbin mounted upon a spindle becomes full size at its winding position, this spindle turns around the coaxial shaft while rotating on its own axis so as to wind the yarn upon the bobbin. This spindle is hereinafter referred to as a first spindle.

Simultaneously, another spindle supporting a fresh bare bobbin turns around the common axis and then commences its rotation on its own axis. This spindle is hereinafter referred to as a second spindle. Consequently, a full packaged bobbin held by the first spindle and a fresh bare bobbin held by the second spindle are hereinafter referred to as first and second bobbins, respectively. At this moment, the yarn, which is delivered from its source to the first bobbin, passes below the second spindle which is rotating on its own axis while contacting the surface of the second bobbin and the yarn is taken up about the first bobbin of a full package. The yarn, which is passing through a space between the above-mentioned two bobbins, is led to a free end por' tion of the second spindle so that the yarn is held by one of several books foimed upon this free end, consequently, the yarn is wound about the fresh bare bobbin held by the second spindle. When. the yarn is held by the hook as mentioned above, the yarn between both spindles is simultaneously cut and. the rotation of the first spindle is stopped when the above-mentioned yarn-transfer motion is completed.

In the thread transfer mechanism of the abovementioned copending application, the construction thereof is very complex and motions of the component elements must be controlled by a cam mechanism so that it is required to precisely adjust timing related to the motion of the cam mechanism.

The principal object of the present invention is to provide an improved thread transfer mechanism of a turret-type yarn winder, which eliminates the drawbacks caused by the above-mentioned precise adjustment and complex construction.

BRIEF EXPLANATION OF THE DRAWINGS FIG. 1 is a perspective view of the thread transfer mechanism of a turret-type winder, according to the present invention,

FIG. 2 is an elevational view, partly in section, of an articulated thread guide means of the thread transfer mechanism, shown in FIG. 1,

FIG. 3 is a side view, partly section, of the articulated thread guide means shown in FIG. 2,

FIG. 4 is a cross-sectional view of a part of the articulated thread guide means, taken along a line IV IV, in FIG. 2,

FIGS. 5 and 6 are elevational and side views of the cam and crank mechanism for actuating the thread transferring mechanism shown in FIG. 1, respectively,

FIG. 7 is a schematic view of the thread transferring mechanism for illustrating the function of the mechanism shown in FIG. 1.

DETAILED DESCRIPTION In the schematic view of the thread transfer mechanism shown in FIG. 1, which shows a typical embodiment of the present invention, a transitional situation of the yarn transferring motion is shown. Referring to FIGS. 1, 2 and 3, an articulated thread guide member 5 leads a yarn A from a full package bobbin 4' by the first spindle 1 to the free end portion of the second spindle 2 to be held by one of several hooks formed upon the end portion of the second spindle 2 so that the yarn A is wound about a fresh bare bobbin 3 held by the second spindle 2.

Next, a yarn push member 35 of the thread guide member 5 pushes the yarn A into a slit 34 of a head portion 33 of the thread guide member 5 so as to cut the yarn A by a cutter 36 rigidly disposed inside the slit 34, and then the yarn transfer motion from the full package 4 to the fresh bare bobbin of the spindle 2 is completed. As shown in FIG. 4, the cutter 36 is secured to a holding member 37 by a bolt 38 so as to face the slit 34.

The thread guide member 5 is turned toward a direction represented by an arrow B about a shaft 17 secured to a bracket 7 which is rigidly mounted on a machine frame, so as to be located at a stational position below the spindles l and 2 during a normal take-up operation, and when the package of a bobbin held by a spindle at its working position becomes full size and it is required to exchange the winding operation from the full package bobbin to a fresh empty bobbin held by a spindle waiting at a standby position, firstly, the positions of above-mentioned spindles are exchanged and then the thread guide member 5 is turned to the opposite side of the above-mentioned stational position outside the winding mechanism by passing through an intermediate space between these spindles. In other words, the thread guide member 5 turns toward the outside of the turret-type winding mechanism. After completion of the above-mentioned turning of the member 5 toward the outside of the winding mechanism, an upper portion of the member 5 is folded toward the free end of the spindle holding the bare bobbin so that the yarn A is held by one of hooks formed upon the free end of the spindle.

The mechanism and fuction of the thread transferring mechanism is hereinafter illustrated in detail. Referring to FIGS. 1 6, the motion of the thread transferring mechanism is controlled by the relative motion ofa crank disc 13 and a cam 11. The disc 13 is secured to a control shaft of a cam mechanism 9 which actuates motions of component elements in accordance with a controlled program. The main shaft 10 is driven in the same manner as illustrated in the embodiment shown in the above-mentioned copending patent application Ser. No. 4,243 which is now allowed, that is, the main shaft 10 is fixed axially to a first sprocket wheel (not shown) and a second sprocket wheel (not shown) is secured to one end of a driving shaft (not shown) connected to a suitable driving source such as an individual motor electrically controlled by signals from a control device (not shown) when the bobbin exchange operation is carried out. The first sprocket wheel is driven by the second sprocket wheel by way of an endless chain in such a way that the main shaft 10 is turned one cycle or revolution at every bobbin exchange operation. An end of a crank rod 6 is pivoted to a peripherally adjacent portion of the crank disc 13 by a pin 14 and another end of the crank rod 6 is pivoted by a pin 20 to a horizontal member 19 secured to a lower hollow frame 28. Consequently, when the pin 14 is located at a position represented by 14' in accordance with a turning motion of the crank disc 13, the lower hollow frame 28 which comprises a base member of the thread guide member 5 is turned about the shaft 17, toward a direction represented by an arrow B (FIGS. 1 and 6). Consequently, the top portion of the member 5 is displaced to a position below the spindles. When the thread transfer motion from the full packaged bobbin 4' of the spindle 1 to an empty or fresh bare bobbin of the spindle 2 is operated, the pin 14 is displaced from a position represented by 14' to a position represented by a solid line in accordance with the rotation of the main shaft 10 of the cam mechanism 9, and the guide member 5 is turned in a direction opposite to the direction of arrow B about the shaft 17 to the position represented by a solid line. Supposing an imaginary plane passes vertically through a space between both spindles, the top portion of the guide member 5 moves from its lowermost position to its elevated position along the above-mentioned imaginary plane. Since the yarn A is delivered from its supply source and wound about a bobbin 4 while the yarn A passes below the second spindle 2, the yarn A is held by the slit portion 34 formed on a head portion 33 of the guide member 5.

The guide member 5 comprises the lower hollow frame 28 and an intermediate hollow frame 29 tumably supported inside of the lower hollow frame 28 by a pair of supporting pins or pivots 39. Further, an upper hollow frame 41 is tumably supported by a pin or rod 32 mounted on a top portion of the lower hollow frame 28 in such a way that a pair of recesses 42 formed in a bottom end portion of the upper frame 41 engage with one of a pair of inwardly projecting pins 31 secured to a top portion of the intermediate hollow frame 29, respectively, and an arm 40 rigidly mounted upon the upper hollow frame 41. The head portion 33 of the guide member 5 coincides with a head portion of the arm 40 and the arm 40 is provided with a slit 34. A first sprocket wheel 21 is rigidly mounted upon the shaft 17 of the lower hollow frame 28. On the other hand, a second sprocket wheel 26 is rotatably mounted upon a horizontal shaft 27 which is secured to the arm 40. These

sprocket wheels

21 and 26 are connected by

chains

22, 24a, 24b and 25 and a helical spring 23 which connects the

chain

22 and 24b. In the abovementioned connection of chains, it is a characteristic feature that the chains 24a, 24b are flexible in the direction of a right angle in connection with the flexible direction of the

chains

22 and 25. The abovementioned characteristic feature of the chain connection is essential for attaining the articulated motion of the thread guide member 5.

As it is clearly shown in FIGS. 2 and 3, the intermediate hollow frame 29 is capable of turning about pins or pivots 39 toward a direction represented by an arrow C. The intermediate hollow frame 29 is provided with a horizontal arm 30 and a spherical journal 48 is rigidly disposed in a cut-out portion formed at the free end portion of the horizontal arm 30. On the other hand, another spherical journal 44 is formed at a tip end of a horizontal rod 43 which is rigidly disposed on a freeend portion of a rod 8. The rod 8 is turnably supported by a shaft 15 secured to the machine frame so as to swing about the shaft 15 by means of a cam 11 (FIGS. 5, 6). The above-mentioned

journals

44 and 48 are held in the respective

spherical bearings

46, 47 which are formed at both ends of the journal bearing 45. A sprocket wheel 16 is rigidly mounted at the other end of the horizontal rod 43 and the

sprocket wheels

16 and 21 are connected by a chain 18. As shown in FIGS. 5 and 6, the cam 11 is secured to the crank shaft 10 so that the cam 1 1 rotates together with the crank disc 13. However, the angular phase difference between a position of the pin 14 mounted on the crank disc 13 and a projection 12 of the cam 11 with respect to the cam axis is required to conform with a predetermined time lag for providing the necessary relative motions of the above-mentioned lower hollow frame 28 and the intermediate hollow frame 29 and the upper hollow frame 41. The rear end of the rod 8 is always urged to the outer peripheral surface of the cam 1 1. When the rear end of the rod 8 contacts the projection 12 of the cam 11, the rod 8 turns from a position shown by a dotted line to a position by a solid line. Since the shaft 15 is horizontally secured to the machine frame and when the rod 8 is positioned at the dotted line position, the horizontal rod 43 is displaced-from a position represented by a solid line to a position represented by a dotted line. Consequently, the intermediate hollow frame 29 turns about the pins or pivots 39 towards the dotted line position by the above-mentioned connection with the journal bearing 45 and the

spherical journals

43, 48. Since the pin 32 is rigidly mounted on the intermediate hollow frame 29, engages with the recess portions 42 of the upper hollow frame 41 and the upper hollow frame 41 is turned to its position represented by a dotted line shown in FIG. 3 in accordance with the abovementioned turning motion of the intermediate hollow frame 29 so that the arm 40 is turned to its position represented by a dotted line. This turning motion of the arm 40 is so designed that the slit 34 of the head portion 33 of the arm 40 is subjected to a position facing the hooks formed upon the free end of the second spindie 2 holding the fresh bare bobbin 3.

On the other hand, the first sprocket wheel 21 rotates in accordance with and responsive to a downward motion of the sprocket wheel 16 secured to the horizontal rod 43 so that the second sprocket wheel 26 rotates in a direction shown by an arrow D (FIG. 2) by way of the chain 22, spring 23, and

chains

24a, 24b and 25.

Since the yarn pushing member 35 is mounted upon the sprocket wheel 26, the yarn pushing member 35 is turned from its dotted line position to a solid-line position (FIG. 2) about the shaft of the sprocket wheel 26 in accordance with and in response to the rotation of the sprocket wheel 26. Consequently, the yarn A positioned at the slit 34 of the head portion 33 is accurately urged to the cutter 36. Consequently, when the yarn pushing member 35 turns to a relative position shown in FIG. 2, the yarn A is cut by the cutter 36. In the above-mentioned motion, the spring 23 works as a cushion when the pushing member 35 positively urges the yarn A to the cutter 36 and also works to create a smooth engagement of the pin 31 of the intermediate hollow frame 29 with recesses 42 of the upper hollow frame 41. As already illustrated, since the flexible direction of the chains 24a (24b) is at a right angle to that of the chains22 and 25, the turning motion of the first sprocket wheel 21 can be smoothly transmitted to the second sprocket wheel 26 without disturbance by the articulate turning motion of the intermediate hollow frame 29 together with the upper hollow frame'4 1.

As shown in FIG. 7, at an intermediate transitional condition just before the yarn pushing member 35 turns to the slit portion 24 of the head portion.33, the yarn A, which is delivered from a yarn guide of a winding mechanism and is wound upon the bobbin 4 of the first spindle 1 while passing below the second spindle2, is held by one of the hooks 2' formed upon a free end of the second spindle 2, by means of the above-mentioned motion of the articulated thread guide member 5.

As already illustrated, the timing of the abovementioned motions of elements can be easily set by adjusting the angular phase difference between the disposed position of the pin 14 upon the crank disc 13 and the position of the projection 12 of the cam 11. Consequently, the thread transferring mechanism according to the present invention is more practically and precisely applicable to the so-called turret-type yarn winder in comparison with the conventional one.

What is claimed is:

1. In a turret-type winding mechanism of a yarn winder having apair of spindles disposed in parallel and symmetrical arrangement with respect to a common turret shaft for exchanging the positions of said spindles to alternately position each of said spindlesin a winding position, an automatic mechanism for transferring yarn delivered from a supply source from the spindle holding a full packaged bobbin to the spindle holding an empty bobbin, said automatic mechanism comprising in combination with said turret-type winding mechanism: articulated guiding means for guiding said yarn to a position adjacent a free end of said spindle holding said empty bobbin immediately after said spindles undergo an exchange of positions, said articulated guiding means comprising a stationary shaft disposed below said spindles, a lower hollow frame swingably supported on said stationary shaft; a pair of inwardly projecting pivots secured to said lower frame, an intermediate hollow frame disposed inside of said lower frame and pivotally supported at its lower portion on said inwardly projecting pivots, a rod secured to an upper portion of said lower frame in spaced relationship from said stationary shaft, an upper hollow frame disposed in said intermediate hollow frame and turnably mounted on said rod, a pair of inwardly projecting pins secured to inside wall portions of said intermediate frame, and means defining recesses in the lower end of said upper hollow frame each engaging with one of said inwardly projecting pins whereby said lower frame is capable of turning about said stationary shaft together with said intermediate and upper hollow frames as one body thereby defining a first mode of actuation and said upper hollow frame is capable of turning about said rod during turning motion of said intermediate hollow frame about said pivots thereby defining a second mode of actuation; actuating means for sequentially actuating saidarticulated guiding means in said first and second modes in conjunction with the motion of said turret-type winding mechanism; catching means disposed at free end portions of each of said spindles operative to catch the thread when same is guided by said articulated guiding means; and cutting means coacting with said articulated guiding means and operative in accordance with and in response to the motion of said articulated guiding means for cutting said yarn at a location between said full package and the catching means of said spindle holding said empty bobbin.

2. A mechanism for transferring yarn in a turret-type winding mechanism of a yarn winder according to claim 1, wherein said catching means on each of said spindles comprises a plurality of cut-out hooks formed upon a free edge thereof.

3. A mechanism for transferring yarn in a turret-type winding mechanism according to claim 1, wherein said lower hollow frame is provided with a lower sprocket wheel rotatably supported on said stationary shaft, said upper frame having a horizontal shaft secured to an upper portion thereof in parallel relationship with said stationary shaft and provided with an upper sprocket wheel rotatably mounted on said horizontal shaft, said upper frame having a yarn receiver on a top portion thereof, a push member secured to said upper sprocket wheel so that a yarn can be pushed into said yarn receiver when said upper sprocket wheel is turned in accordance with rotation of said lower sprocket wheel, a power transmission means for transmitting the motion of said lower sprocket wheel to said upper sprocket wheel, said power transmission means comprising a first flexible chain engaged-with said lower sprocket wheel, a second flexible chain engaged with said upper sprocket wheel, a third flexible chain connected to one end of said first chain and teens end of said second chain and flexible in a right angle direction toward the inherent flexible direction of each of said first and second chains, a fourth flexible chain having the same flex ible direction as said third chain and connected to another end of said second chain, and a helical spring connected to another end of said fourth chain and another end of said first chain to resiliently maintain the chain connection of said first, second, third and fourth chains between said lower and upper sprocket wheels.

4. A mechanism for transferring yarn in a turret-type winding mechanism according to claim 1, wherein said actuating means comprises a control shaft turnably mounted to undergo one turning cycle at every bobbin exchange operation, a crank disk rigidly mounted on said control shaft, a cam rigidly mounted on said control shaft, a crank rod pivotally mounted on a peripheral adjacent edge portion of said crank disk and another rod mounted for swinging movement in such a way that a free end thereof is always urged against the camming surface of said cam, and a mechanism for connecting said lower hollow frame with said crank rod and for connecting said intermediate hollow frame with said another rod, whereby said crank rod is firstly actuated in response to turning motion of said crank disk to turn said lower hollow frame about said stationary shaft together with said intermediate hollow frame and upper hollow frame followed by swinging of said another rod to turn said intermediate hollow frame about said projecting pivots of said lower hollow frame and said upper hollow frame is simultaneously turned about said pin disposed at an apex portion of said intermediate hollow frame.

5. A mechanism for transferring yarn in a turret-type winding mechanism according to claim 10, wherein said mechanism for connecting said lower hollow frame comprises a pivot arm secured to a lower end portion of said lower hollow frame and pivotally connected to a free end of said crank rod, a horizontal arm projecting outwardly from a lower end portion of said intermediate hollow frame provided with spherical journal at a free end thereof, a horizontal rod secured to said another rod at a free end portion thereof, a pair of spherical journal bearings connected said spherical journal of said horizontal arm with said spherical journal of said horizontal rod, another sprocket wheel tumably mounted on said stationary shaft, a small sprocket wheel rigidly secured to a free end portion of said another rod, and another chain connecting said another sprocket wheel with said small sprocket wheel, whereby turning of said another rod effects turning of another sprocket wheel to actuate said cutting means. n

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,761,028 Dated September 25, 1973 Inventor(s) SOICHI TORII and HARUYOSHI ISHIKAWA It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Claim 1, column 6, lines l3, l4, 17, 22 and 24 before "frame" insert hollow;

column 6, lines 36,delete "thread" and insert --yarn--.

Claim 3, column 6, lines 5 and 9, before "frame" insert -hollow--.

Signed and sealed this 2nd day of April 1971i.

(SEAL) Attest:

EDWARD I-'I.FLETCHER,JR. C. MARSHALL DANN Attesting Officer Commissioner of Patents F ORM 5 0-1050 (10-69) USCOMM-DC 60376-P69 \1' U.S. GOVERNMENT PRINTING OFFICE [9S9 0-366-334,

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION PatentiNo. 3,7 1,028 Dated September 25, 1973 Inventor(s)SOICHI TORII and HARUYOSHI ISHIKAWA It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Rewrite claim 5 as follows:

5. A mechanism for transferring yarn in a turret-type winding mechanism according to claim 4, wherein said mechanism for connecting said lower hollow frame with said crank rod and for connecting said intermediate hollow frame with said another rod comprises a horizontal member secured to a lower portion of said lower hollow frame and pivotally connected to a free end of said crank rod, a horizontal arm projecting outwardly from a lower end portion of said intermediate hollow frame and provided with a spherical journal at a free end thereof, a horizontal rod secured to said another rod at a free end portion thereof and provided with another spherical journal, a pivot "arm provided with a pair of spherical journal bearings respectively supporting said spherical journal of said horizontal arm and said spherical journal of said horizontal rod, another sprocket wheel turnably mounted on said stationary shaft, a small sprocket wheel rigidly secured to a free end portion of said another rod, and another chain connecting said another sprocket wheel with said small sprocket wheel, whereby turning of said another rod effects turning of said another sprocket wheel to actuate said cutting means.

Signed and sealed this 2nd day of April 1971+.

(SEAL) Attest:

EDWARD I LFLETCI-HBRQJR. G. MARSELALL DANN Attesting Officer Commissioner of Patents FORM PO-1050 (10-69) USCOMM-DC 6O376-P69 U.S. GOVERNMENT PRINTING OFFICE i99 0-366-33L

Claims

1. In a turret-type winding mechanism of a yarn winder having a pair of spindles disposed in parallel and symmetrical arrangement with respect to a common turret shaft for exchanging the positions of said spindles to alternately position each of said spindles in a winding position, an automatic mechanism for transferring yarn delivered from a supply source from the spindle holding a full packaged bobbin to the spindle holding an empty bobbin, said automatic mechanism comprising in combination with said turret-type winding mechanism: articulated guiding means for guiding said yarn to a position adjacent a free end of said spindle holding said empty bobbin immediately after said spindles undergo an exchange of positions, said articulated guiding means comprising a stationary shaft disposed below said spindles, a lower hollow frame swingably supported on said stationary shaft; a pair of inwardly projecting pivots secured to said lower frame, an intermediate hollow frame disposed inside of said lower frame and pivotally supported at its lower portion on said inwardly projecting pivots, a rod secured to an upper portion of said lower frame in spaced relationship from said stationary shaft, an upper hollow frame disposed in said intermediate hollow frame and turnably mounted on said rod, a pair of inwardly projecting pins secured to inside wall portions of said intermediate frame, and means defining recesses in the lower end of said uPper hollow frame each engaging with one of said inwardly projecting pins whereby said lower frame is capable of turning about said stationary shaft together with said intermediate and upper hollow frames as one body thereby defining a first mode of actuation and said upper hollow frame is capable of turning about said rod during turning motion of said intermediate hollow frame about said pivots thereby defining a second mode of actuation; actuating means for sequentially actuating said articulated guiding means in said first and second modes in conjunction with the motion of said turret-type winding mechanism; catching means disposed at free end portions of each of said spindles operative to catch the thread when same is guided by said articulated guiding means; and cutting means coacting with said articulated guiding means and operative in accordance with and in response to the motion of said articulated guiding means for cutting said yarn at a location between said full package and the catching means of said spindle holding said empty bobbin.

3. A mechanism for transferring yarn in a turret-type winding mechanism according to claim 1, wherein said lower hollow frame is provided with a lower sprocket wheel rotatably supported on said stationary shaft, said upper frame having a horizontal shaft secured to an upper portion thereof in parallel relationship with said stationary shaft and provided with an upper sprocket wheel rotatably mounted on said horizontal shaft, said upper frame having a yarn receiver on a top portion thereof, a push member secured to said upper sprocket wheel so that a yarn can be pushed into said yarn receiver when said upper sprocket wheel is turned in accordance with rotation of said lower sprocket wheel, a power transmission means for transmitting the motion of said lower sprocket wheel to said upper sprocket wheel, said power transmission means comprising a first flexible chain engaged with said lower sprocket wheel, a second flexible chain engaged with said upper sprocket wheel, a third flexible chain connected to one end of said first chain and to one end of said second chain and flexible in a right angle direction toward the inherent flexible direction of each of said first and second chains, a fourth flexible chain having the same flexible direction as said third chain and connected to another end of said second chain, and a helical spring connected to another end of said fourth chain and another end of said first chain to resiliently maintain the chain connection of said first, second, third and fourth chains between said lower and upper sprocket wheels.

5. A mechanism for transferring yarn in a turret-type winding mechanism according to claim 10, wherein said mechanism for connecting said lower hollow frame comprises a pivot arm secured to a lower end portion of said lower hollow frame and pivotally connected to a free end of said crank rod, a horizontal arm projecting outwardly from a lower end portion of said intermediate hollow frame provided with spherical journal at a free end thereof, a horizontal rod secured to said another rod at a free end portion thereof, a pair of spherical journal bearings connected said spherical journal of said horizontal arm with said spherical journal of said horizontal rod, another sprocket wheel turnably mounted on said stationary shaft, a small sprocket wheel rigidly secured to a free end portion of said another rod, and another chain connecting said another sprocket wheel with said small sprocket wheel, whereby turning of said another rod effects turning of another sprocket wheel to actuate said cutting means.