US3235914A

US3235914A - Filament drafting device for a spinning machine

Info

Publication number: US3235914A
Application number: US222290A
Authority: US
Inventors: Beppu Ihei
Original assignee: TAKEIRI SCISAKUSHO KK
Current assignee: TAKEIRI SCISAKUSHO KK
Priority date: 1961-09-12
Filing date: 1962-09-10
Publication date: 1966-02-22
Anticipated expiration: 1983-02-22

Description

Feb. 22, 1966 lHEl BEPPU 7 3,235,914

FILAMENT DRAFIING DEVICE FOR A SPINNING MACHINE Filed Sept. 10, 1962 2 Sheets-Sheet 1 INVENTOR.

5' IHEI BEPPU ATTORNEY Feb. 22, 1966 [HE] BEPPU 3,

FILAMENT DRAFTING DEVICE FOR A SPINNING MACHINE Filed Sept. 10, 1962 2 Sheets-Sheet 2 IUHHH 22 f l I 11 l 5i l H INVENTOR.

IHEI BEPPU BYga AT ORNEY United States Patent ()fiice 3,235,914 Patented Feb. 22, 1966 3,235,914 FILAMEN'I DRAFTING DEVICE FOR A SPINNING MACHINE Ihei Beppu, Showa-ku, Nagoya, Japan, assignor to Kabushiki-Kaisha Takeiri Seisakusho, Nagoya, Japan Filed Sept. 10, 1962, Ser. No. 222,290

Claims priority, application Japan, Sept. 12, 1961, 36/445,690; Dec. 5, 1961, 36/60,342; Dec. 12, 1961, 36/ 61,304

10 Claims. (Cl. 19-255) This invention relates to apron band type drafting devices for spinning machines.

In this type of drafting device it is highly desirable that the bands grip the filaments between them, with uniform pressure throughout the area of contact. Such a quality assures uniformity of yarn and avoids severance or breakage.

It is the principal object of this invention to provide a drafting device of the type mentioned, wherein the gripping pressure between the contacting areas of the upper and lower apron bands is uniform over the entire area of contact, thereby assuring yarn of high and uniform quality.

A further object is to provide a drafting device of the type mentioned wherein the upper tenser and upper roller are capable of individual or independent motion toward and from the lower band.

Yet another object is to provide a drafting device as in the preceding paragraph, wherein the force acting to urge the upper tenser into contact with the lower may be varied, to thereby equalize the forces with which the tensers are urged toward each other, with the forces urging together the upper and lower rollers.

Still another object is to provide a drafting device of the type mentioned which enables ready variation of the pressure between the contacting areas of the upper and lower bands, in accordance with the condition of the surfaces thereof.

Another object is to provide a drafting device of the type mentioned wherein the upper tenser and upper roller may be easily released and pivoted to a raised position free and clear of the lower tenser and roller, and, if desired, easily completely detached.

Other objects and advantages will become clear to those skilled in the art, after a study of the following detailed description, in connection with the accompanying drawing.

In the drawing:

FIGURE 1 is a side elevation of one form of the invention;

FIGURE 2 is a top plan view corresponding to FIG- URE 1 but with certain parts omitted for clarity of illustration; I FIGURE 3 is a side elevation of a second or modified form;

FIGURE 4 is a top plan of the form depicted at FIG- URE 3;

FIGURE 5 is a side elevation of a third modification, and

FIGURE 6 is a top plan view corresponding to FIG- URE 5.

Referring in detail to FIGS. 1 and 2, 7 identifies a horizontal rod of the machine, to which is fixed, as by means of a machine screw, not shown, a retaining or drafting frame or support 6. As is seen from FIG. 2, this frame includes a pair of spaced

parallel side walls

6a and 6b of identical shape. At their forward reduced ends the two walls are fixed to the respective ends of lower tenser 10 to support the same. The mid portions of the upper edges of the walls are slotted to receive with a smooth fit, the ends of the shaft 13 of upper roller 14. The slots are generally arcuate about the axis of symmetry of the curved forward edge of tenser 11.

At the rearward portions of their upper edges, walls 6a and 612 have fixed pins 4, 4', aligned in a direction parallel with the axes of the two rollers. A tenser fitting frame 5 comprises a generally U-shaped body

portion including arms

5a, 5b and a connecting base or bight. At their distal ends the arms are interconnected by, and support, upper tenser 11. Each of these arms is provided with a bearing or hole, by which the frame is mounted upon pins 4 for pivoting about the axis thereof. A rod 3 is preferably integrally connected at its one end, with the central portion of the bight of frame 5 and extends reversely forwardly over the upper band 12 passing about tenser 11 and roller 14. A weight 2 is mounted upon rod 3 for sliding adjustment therealong, and is fixed in a selected position of adjustment by set screw 1, Lower band 9 passes about tenser 10 and lower roller 8, the latter being journaled in bearing block 62 fixed to rod 7 and, conjointly with frame 6 forming support means.

In a manner obvious from inspection of FIG. 1, weight 2 effects a moment on frame 5, counterclockwise about the axis of

pins

4, 4, thus urging upper tenser 11 downwardly toward lower tenser 10, so that the reaction force between tensers may be varied by a corresponding adjustment of the weight on and along rod 3. Since upper roller 14 is free to pivot downwardly in and along the slots in

walls

6a and 6b, the weight of the roller 14 urges downwardly the adjacent end of the pass of band 12 in contact with band 9. Considering the area of the two bands in contact, it is clear that by appropriate adjustment of weight 2 on and along rod 3, the pressure between the bands over the area mentioned may be made uniform.

The form of the invention shown in FIGS. 1 and 2, is for use with short fibers. At FIGS. 3 and 4, there is shown a form for spinning long fibers. In this form retaining frame 6' is supported by and upon horizontal bar 19 and has two integrally-connected laterally spaced, vertical side walls which are identical in shape and form and include slots opening through their upper edges to receive with a smooth fit the ends of shaft 13', to which roller 14 is attached. Lower roller 8 is journaled in a bearing block 6; fixed with bar 19 and, conjointly with plate 18, bar 19 and frame 6' forming support means. A pair of horizontally aligned

pins

4a and 4b are fixed in the forward edge of the respective walls of frame 6' and each receives with a smooth fit, the aperture in the respective distal end of a pair of parallel spaced side walls 50 and 5d of tenser fitting frame 5'. The frame includes a plate portion 5e by which the walls are integrally connected. Upper tenser 11 is mounted in and supported at its ends, by the forward ends of the arms of frame 5. A weight 2' is carried by plate portion 5e and is secured in position thereon by set screw 1'. This weight may be made adjustable forwardly and rearwardly, by a slot not shown, in portion 5e through which screw 1 projects.

Retaining plate 18 for lower tenser 10' has a pair of parallel, laterally-spaced slots 17 therein. See FIG. 4. Each slot is substantially parallel with the common plane of shaft 13',

pins

4a, 4b, and upper tenser 11, and receives with a smooth sliding fit, a respective one of a pair of depending lugs 16 integral with the side walls of the upper tenser fitting frame, so that movement of the frame is limited to pivoting about the common axis of pins 4:: and 4b. It is noted that the axes of shaft 13,

pins

4a, 4b, and tenser 11, lie in a common plane as indicated by line IIIIII, FIG. 3, so that frame 5 is essentially unaffected by tension in band 12 and responds substantially exclusively, to the downward force of weight 2. Thus, by the proper selection of weight 2, or by its adjustment forwardly or rearwardly on and along portion 5e of frame 5', the pressure between the contacting areas of the upper and lower bands 12' and 9' may be equalized over the entire area.

FIGS. 5 and 6 show a third modification in which horizontal rod 7 may be the same as in FIG. 1. A base 25 is secured to rod 7 and includes a pair of parallel, upwardly-directed, spaced parallel arms having a pair of aligned pins 26 affixed to and extending from the respective arms.

The retaining frame or support means 6" comprises a pair of spaced vertical

identical side walls

6c and 6d, each of which is provided with a slot such as 27, FIG. 5, slidably fitting a respective one of pins 26. The lower tenser 10" is carried by a fixed retaining plate 18 which is functionally integral with rod 7 and which has therein, a pair of laterally-spaced parallel slots, one of which is identified at 17, FIG. 5. The forward end of each wall of frame 6" is formed as a hook such as 24, FIG. 5. Each hook has a smooth sliding fit within its slot in plate 18' and projects forwardly beneath the plate so that, in conjunction with pins 26 and slots 27, previously described, the frame may have limited translation in the forward and rearward direction parallel with plate 18. At their upper edges,

side walls

6c and 6d are provided with transversely-aligned slots each of which receives with a smooth fit, the respective ends of shaft 13 to which upper roller 14 is fixed, so that, as in the preceding species, the roller may have limited translation in and along the slot. Since all rollers may be duplicates, they have been designated by the same reference numeral.

Lower roller 3 is journaled in a bearing block 6g fixed to rod 7. Block 6g, rod 7, base 25, and retaining plate 18' are rigidly associated and fixed with respect to each other and to the base frame of the machine and, as a result, together with frame 6", form support means.

The upper tenser fitting frame 5" consists of two side walls integrally connected at their upper edges by plate 5f. These walls at their forward portions mount upper tenser 11" between them. At their rearward portions each wall is provided with one of a pair of aligned apertures each receiving a respective one of a pair of aligned pins 40 and 4d fixed to frame 6" so that frame 5" may pivot slightly about the common axis of the pins, to thereby move upper tenser 11 toward and from lower tenser 10". The forward edge of plate 5 is curled upwardly as indicated at 22, to retain the straight central portion of a U-shaped wire spring 20. The two leg portions of the spring are coiled, as clearly shown upon FIG. 5, to fit about respective aligned

pins

21, 21, carried by frame 6". Any sutiable means, not shown, are fixed with frame 6" to engage and hold the short projecting ends of the spring against clockwise rotation, as viewed upon FIG. 5. Thus the spring acts to yieldingly urge frame 5" into counterclockwise pivotal movement and, thus urges tenser 11" toward tenser 10". Means not shown, may be provided to adjust the tension of spring and to thus vary the force with which it urges tenser 11" downwardly. Or of course, springs of different tensions may be substituted as desired.

The operation is essentially the same as in the two species previously described. Since the upper roller 14 and upper tenser 11" are mounted for independent motion toward and from lower roller 8" and lower tenser 10", respectively, selection of a spring 20 of suitable tension, enables equalization of the pressure over the entire area of contact of the upper and lower bands 12" and 9". Aligned pins 23, 23' fixed in the respective side walls of frame 6" are so disposed as to limit the downward pivotal movement of the spring about the axis of pins 21. Thus it is possible to raise upper assembly comprising frames 5" and 6", by first sliding it upwardly in a direction parallel with plate 18', until hooks 24 are free of the plate. Thereafter the assembly may be pivoted clockwise about the axis of pins 26 to raise the upper tenser and roller free of the lower ones. If desired the entire assembly may then be removed simply by slidingit off pins 26.

Restoration of the assembly to operating position is equal- 1y facile.

The present specification describes the invention for the purposes of the disclosure. It is however, intended to cover all changes, modifications and combinations of the embodiments shown, which do not depart from the spirit and scope of the invention as claimed.

Having now fully disclosed the invention what is claimed is:

1. In a filament drafting device for a spinning machine, a lower tenser and lower roller about which a lower apron band passes, a support means for said lower tenser, said lower roller having an axis of rotation in fixed rela tion with said support means, an upper roller journaled in said support means for movement under its own weight toward contact with said lower roller, a frame mounted on said support means for pivotal movement relatively thereto, about an axis parallel with the axis of said rollers, an upper tenser fixed with said frame and pivotable therewith toward contact with said lower tenser, means operating upon said frame to yieldingly urge said upper tenser about said axis, toward said lower tenser, and an apron band passing about said upper rollers and said upper tenser.

2. The device of claim 1, said last-named means comprising a weight connected with said frame and adjustable relatively thereto in a direction normal to parallel said axis to thereby vary the force urging said tensers together.

3. The device of claim 1, said parallel axis lying between said upper roller and upper tenser and in a plane common with the axes thereof. v

4. The device of claim 3, said support means including a fixed retaining plate supporting said lower tenser, there being a slot in said plate generally parallel with said plane, and a lug on said frame slidably fitting said slot.

5. The device ofclaim 1, said last-named means comprising a spring acting between said support and said frame to yieldingly urge said tensers toward contact.

6. An apron band type drafting device for a spinning machine, comprising, a support including integrally-connected laterally-spaced vertical side walls, a lower tenser fixed in and between the forward portion of said walls, a lower roller journaled for rotation on an axis fixed with and in spaced parallel relation with said lower tenser, a frame including laterally-spaced integrally-connected parallel arms, an upper tenser fixed to and supported by and between the forward distal ends of said arms, an upper roller journaled in and between said side Walls of said support means mounting the rearward ends of said arms to said side walls, respectively, for movement about an axis parallel with said roller and said tensers, a rod fixed with said arms, and extending normal to said axis and over said tensers, and a weight mounted on said rod for fixation in adjusted position therealong, each said side wall of said support having a slot opening through its top edge to receive said upper roller, said slots being transversely aligned and arcuate about the leading edge of said upper tenser when in operating relation with respect to said lower tenser and upper and lower apron bands, each passing about its tenser and roller.

7. An apron band type drafting device for a spinning machine, comprising, a lower roller journaled for rotation about a fixed axis, a lower tenser fixed in spaced parallel relation forwardly of said lower roller, a support adjacent said lower roller and including a pair of transversely-spaced vertical side walls, a tenser frame including a pair of parallel transversely-spaced arms each pivoted at its rearward end to a respective one of said walls for pivoting about a first axis parallel with said lower roller and tenser, an upper tenser fixed with and supported by and between said arms at their forward ends, for movement toward and from contact with said lower tenser, there being a pair of transversely-aligned slots in said walls opening upwardly through the top edges thereof, an upper roller having its shaft ends journaled in said slots for rotation on an axis parallel with said lower roller and for translation in and along said slots toward and from contact with said lower roller, the axis of said upper roller, said first axis and said upper tenser, lying substantially in a common plane, upper and lower apron bands each passing about a respective tenser and roller and having contiguous parallel passes, and a weight removably and adjustably mounted on said frame to urge said upper tenser toward contact with said lower tenser.

8. The drafting device of claim 7, a fixed plate mounting said lower tenser and having therein a pair of parallel laterally-spaced slots generally parallel with said plane, and a pair of lugs each fixed with and depending from the forward portion of a respective one of said arms, each said lug having a smooth sliding fit within a respective one of said slots for guided movement in a respective one of two laterally spaced vertical forward and rearward planes.

9. An apron band type drafting device for a spinning machine, comprising, a lower roller journaled for rotation on a fixed axis, a lower tenser fixed forwardly of said lower roller, a lower apron band extending about said lower roller and lower tenser, a fixed base, a support, means mounting said support on said base for translation in the forward and rearward direction, a tenser frame including a pair of laterally-spaced, integrally-connected, parallel arms, an upper tenser carried by and between said arms at their forward ends, means mounting the rearward ends of said arms to said support for movement about a pivot axis parallel with said tensers, an upper roller journalmi in said support for rotation parallel with, and for translation toward and from contact with said lower roller, an upper apron band passing about said upper tenser and said upper roller, and spring means carried by said support and engaging said tenser frame to effectively urge said frame to pivotal movement about said pivot axis to urge said upper tenser toward contact with said lower tenser.

10. The drafting device of claim 9, said first-named means comprising a pair of aligned pins fixed with said base, said support comprising a pair of laterally-spaced parallel vertical side walls each having a respective one of a first pair of transversely aligned slots, said first pair of slots extending forwardly and rearwardly and slidably receiving a corresponding one of said pins, a fixed plate mounting said lower tenser and having therein a second pair of laterally-spaced parallel slots extending forwardly and rearwardly, each said arm having a hooked forward end extending with a smooth fit through a respective slot of said second pair of slots and engaging forwardly beneath said plate.

References Cited by the Examiner UNITED STATES PATENTS 2,304,885 12/1942 Cobb 19247 2,717,425 9/1955 Noguera 19-255 FOREIGN PATENTS 1,155,302 11/1957 France.

807,372 6/1951 Germany. 359,837 10/ 1931 Great Britain. 527,189 10/ 1940 Great Britain. 737,452 9/ 1955 Great Britain.

OTHER REFERENCES Rubisch German application 1,097,868, printed J an. 19, 1961.

DONALD W. PARKER, Primary Examiner.

Claims

1. IN A FILAMENT DRAFTING DEVICE FOR A SPINNING MACHINE, A LOWER TENSER AND LOWER ROLLER ABOUT WHICH A LOWER APRON BAND PASSES, A SUPPORT MEANS FOR SAID LOWER TENSER, SAID LOWER ROLLER HAVING AN AXIS OF ROTATION IN FIXED RELATION WITH SAID SUPPORT MEANS, AN UPPER ROLLER JOURNALED IN SAID SUPPORT MEANS FOR MOVEMENT UNDER ITS OWN WEIGHT TOWARD CONTACT WITH SAID LOWER ROLLER, A FRAME MOUNTED ON SAID SUPPORT MEANS FOR PIVOTAL MOVEMENT RELATIVELY THERETO, ABOUT AN AXIS PARALLEL WITH THE AXIS OF SAID ROLLERS, AN UPPER TENSER FIXED WITH SAID FRAME AND PIVOTABLE THEREWITH TOWARD CONTACT WITH SAID LOWER TENSER, MEANS OPERATING UPON SAID FRAME TO YEILDINGLY URGE SAID UPPER TENSER ABOUT SAID AXIS, TOWARD SAID LOWER TENSER, AND AN APRON BAND PASSING ABOUT SAID UPPER ROLLERS AND SAID UPPER TENSER.