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Патент USA US3050796

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Aug- 28, 1962
I
E. ROGNER
3,050,789
DEVICE FOR SUPPORTING AND GUIDING
BELTS OF DRAFTING ASSEMBLIES
Filed July :1, 1959
2 Sheets-Sheet 1
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Aug. 28, 1962
E. ROGNER
DEVICE FOR SUPPORTING AND GUIDING
BELTS OF DRAFTING ASSEMBLIES
3,050,789
2 Sheets-Sheet 2
Filed July 31, 1959
F/64
3,®50,789
United grates Patent
Patented Aug. 28, 1962
2
1
3,050,789
DEVICE FOR SUPPGRTING AND GUIDHQG EELTS
0F DRAFTENG ASSEMBLIES
Ernst Rogner, Stuttgart-Bad Qannstatt, Germany, assignor
to SKF Kngellagerfahrihen G.m.h.H., $tuttgart-Bad
Cannstatt, Germany
'
Filed July 31, 1959, Ser. No. ssasso
Claims priority, application Germany Aug. ‘5, 1958
5 Claims. (iii. 19-—252)
The present invention relates to textile apparatus.
More particularly, the present invention relates to the
drafting section of spinning machines used in manufactur
ing yarns. In the drafting section of spinning machines
the rovings are drafted, and part of the drafting struc
ture includes belts between which the rovings move. The
present invention is particularly concerned with the struc
ture which supports and guides the upper belts of such
drafting assemblies.
.
Particular problems occur with upper belts of this
FIG. 2 is a front end view of the structure of the
invention, and in FIG. 2 the conventional parts are also
illustrated in dot-dash lines;
FIG. 3 is a top plan view of the device of the inven
tion, and FIG. 3 also illustrates the conventional struc
ture in dot-dash lines; and
FIG. 4 diagramrnaically illustrates the entire drafting
assembly showing how the structure of the invention is in
corporated therein.
Referring now to FIGS. 1-3, it will be seen that the
top rolls carrying arm 1 is shown in dot-dash lines in
FIG. 1. As is conventional, this top rolls carrying arm
1 is pivotally connected with a plurality of levers which
respectively terminate in saddles which respectively em
brace the axle portions which extend between the sev—
eral pairs of top rolls so that in this way the severali
pairs of top rolls are connected to the top rolls carry
ing arm 1. As is shown in FIGS. 1-3, a pair of coaxial
top rolls 2 are interconnected by the axle 3, and the
saddle which is illustrated in dot-dash lines in FIG. 1
embraces the axle 3 in a conventional manner.
type. Especially where the drafting machines are heavily
loaded, the structure which supports and guides the upper
belts of such drafting machines is subjected to high
stresses and it does not infreqeuntly happen that the con
ventional structure for supporting and guiding the upper
drafting belts becomes permanently deformed so that
the upper and lower belts cannot properly cooperate and
so that the quality of the spun yarn suffers.
One of the objects of the present invention is to pro
vide a device capable of supporting and guiding the
‘The axle
3 has a pair of axially spaced supporting portions lo
cated between the top rolls 2, and a pair of supporting
strip portions 4 of the device of the invention extend
around and receive the supporting portions of the axle
3 so as to serve as supports therefor.
The entire device
of the invention is indicated with reference character
5. The device of the invention further includes a sub
stantially S-shaped leaf spring 6 which has an upper
free end portion (FIG. 1) engaging beneath the front
end of the saddle which cooperates with the axle 3 so
as to urge the device 5 downwardly in a counterclock
upper belt of a drafting assembly and at the same time
being of such great strength that it will be capable of
wise direction around the axis of the axle 3, and in this
way the device 5 is maintained in its operating position
where it cooperates with the lower guide rail 8 shown
withstanding any of the forces which otherwise would
result in the deformation of a conventional device of
this type.
Another object of the present invention is to provide
a belt supporting and guiding device of the above type
in MG. 1 to guide the upper belts 9 properly with re
spect to the lower belts 7, the belts 7 and 9 being shown
in dot-dash lines also. The device 5 of the present in
vention includes an elongated guide rail 10 which extends
parallel to the axis of the top rolls 2 and which extends
over the lower guide rail 8, and the belts 9 pass around
which while being quite strong at the same time is made
of relatively simple components and is quite compact and
easy to combine with the other drafting structure.
It is also an object of the present invention to provide
a structure of the abovetype which will guarantee the
the front edge of the guide rail it), this front edge being
located at the left on the guide rail 1!], as viewed in
FIG. 1, so that with the structure of the invention the
upper belts 9 have a large full area of contact with the
best possible operation of the drafting belts while at' the
same time being quite simple and inexpensive.
With the above objects in view, the present invention
lower belts ‘7 to'provide the best possible drafting action.“
includes a device for supporting and guiding an upper
drafting belt which extends around a top roll of a draft
The lower bolts 7 not only pass around the guide rail 8
but they also pass around the bottom rolls 11, and these
ing assembly of a spinning machine. This device of the
invention includes a supporting strip in which a portion
bottom rolls 11 are driven in a known way.
and has a front edge around which the upper belt passes,
As is particularly apparent from FIG. 3, the free ends
of the supporting strips 4 which are distant from the
guide rail 1d are interconnected by a suitable connecting
The novel features which are considered as charac
60 2 along the guide rail 1d and has a considerable area
of an axle of the top roll is journalled .
An elongated
guide rail is located forwardly'of this supporting strip
strip which is in fact integralwi-th the supporting strips
and this guide rail is substantially parallel to the axis of
4, this latter connecting strip being shown at the right
the top roll. A connecting strip of the structure of the
invention is fixed rigidly with and extends along this 55 end of the strips 4, as viewed in FIG. 1. At their op
posite ends which are next to the guide rail it} the sup
guide rail, and this connecting strip is integral with the
porting strips 4 are rigidly fixed with an elongated con
supporting strip, so that the bearing and connecting strips
necting strip 12 which in the illustrated example is integral
together with the guide 'rail form a unitary assembly
with the supporting strips 4. This elongated connecting
which is quite strong and capable of withstanding large
strip 12 extends parallel to the common axis of the rolls
forces without any undesirable deformation.
overlapping an intermediate portion of the guide rail
teristic for the invention are set forth in particular in
It} so as to provide a large area of contact between the
the appended claims. The invention itself, however, both
connecting strip 12 and the guide rail 11}. The connect
ing strip 12 is rigidly ?xed with the guide rail 10 as, for
as to its construction and its method of operation, to
gether with additional objects and advantages thereof,
will be best understood from the following description of
speci?c and constructive embodiments when read in con
nection with the accompanying drawings, in which:
FIG. 1 is a sectional illustration of a device accord
65
example, by being welded thereto. Thus, the connecting
strip 12 can be spot welded to the guide rail 19 so as .
to be permanently and rigidly connected therewith where
by the supporting member including the supporting strips
ing to the present invention, the conventional structure 70 4 and the connecting strip 12 forms a unitary structure
with the guide rail 10.
which is associated with the device of the invention being
illustrated in dot-dash lines; '
At its free ends the connecting strip 12 is provided
3,050,789
~
A
structure of the invention is shown only partly overlap
ping the guide rail it), it is possible of course to position
3
with upwardly directed guiding members or ears 13 which
engage the inner edges of the belts 9 to participate. in
the guiding of the latter, and a guide rail 15} is provided
the connecting strip 12 entirely overlapping the guide
,at its free ends which are located beyond the ears 13
rail 10, and the cross sectional shapes of the connecting
strip 12 and guide rail 1%} at the portion of the latter
overlapped by the connecting strip 12 are substantially '
with ‘additional guide membersor cars 14 which respec
tively. cooperate with the outer edges of the belts 9, so
that‘e‘ach belt 9 passes between a pair of cars 13 and
the same. Thus, in the case of FIG. 1, these cross sec: ,
' 14 to be laterally guided thereby.
tional shapes are simple rectangles. However, it is pos
. An intermediate portion 12' of the. connecting strip
sible to use various pro?led shapes so that in such an
12 is spaced from the top surface or upper side of the
10 event the connectingstrip 12 and the portion of the guide
rail 10 to de?ne with the latter 'a space extending trans
rail it) overlapped therebywould be nested one in the
versely to. the longitudinal direction of the guide rail
other as well as spot welded or otherwise permanently
through which a portion of the leaf spring 6 passes,'so
?xed together so as to form a unitary assembly.
that in this way the leaf spring 6_is connected with the
structure by being partially received between the inter
mediate portion of the guide rail it} and the adjacent
portion of ‘the connecting strip 12. At its left free end
portion the leaf spring 6 is bent downwardly, as is evident
. inner side edges for the belts 9, it is possible to extend ,
from FIG. 1,‘ so that it-has a free end portion 6' ex
cars 13 would simply be struck ‘from the material of the
tending along the downwardly inclined left portion of
Also, instead of providing upwardly. directed portions
13 of the connecting strip 12 to serve as guides for the
the connecting strip 12 alongv substantially the entire
length of the guide rail 10, and in this lattervv event the
This free end 20
strip 12.
r
the guide rail 10, ‘as viewed in FIG. 1.
portion 6' prevents falling of the leaf spring 6 from the
remainder of the structure of the invention.
Adjacent to its frontiedge the guide rail 10 threadedly
The spacing of the intermediate portion 12' of the
connecting strip 12 from the guide rail 10 enables the
leaf spring 6 to be assembled with the remainder of the
structure after the welding of the connecting strip 12 to
carries an abutment member in the form of a screw
the guide rail 19.
15 whose lower portion or head end extends downwardly 25
Of course, if it is desired to further strengthen the
beyond the underside of the guide rail 10 and rests di- ‘
structure the connecting strip 12 may be provided with
rectly on the lower guide rail 8 of the spinning machine,
strengthening ribs which may either take the lformrof
so that the top surface of the rail 8 acts as a stop sur
separate ribs fastened to the member 12 or the latter
face cooperating with the screw 15 for determining the
may be suitably shaped so as to be provided with ribs
30
‘operating position of the device‘S and thus determinat
on one side and grooves on the other side also for the
ing the position of the belts 9. By turning the screw
purpose of strengthening the structure by rendering it
15 it is therefore possible to adjust the elevation of the
more-rigid.
guide rail 10 and hence the operating position of the
With the stiucture of the invention where the support
device 5.
'
ing strips 4 areintegral with the connecting strip 12 and
The orientation of the structure of the invention in 35 the latter is rigidly ?xed with the guide rail 10, this guide
the entire-draftingv machine is shown in FIG. 4. As
is indicated in dot-dash lines in FIG. 4, the drafting’
rail 19 together with the connecting strip 12 and the,
bearing strips 4 forma unitary assembly which is very
strong and which is capable of resisting relatively large
machine includes a suitable base structure which sup
ports the several bottom rolls for adjustable movement
forces so that during use of the structure of the inven
in the direction of the drawing ?eld. Thus, the several 40 tion there is nopossibility of deformation of the struc~
bottom rolls are carried by bearings which are themselves
ture which supports and guides the upper :belts g’ and in
shiftable along the inclined supporting surface shown in
this way the best possible cooperation of the upper belts
FIG. 4 in both-directions along the rovings. The lower
9 with the lower belts 7 is guaranteed.
guide rail 8 is carried by the bearing which supports the
It will be understood that each of the eIementsYde
front bottom rolls, and the bottom rolls 11 are clearly
scribed above, or two or more‘ together, may also ?nd‘a
illustrated in FIG. 4 supported by their own adjustable
useful application in other types of drafting assemblies
bearing. The belts 7 which respectively cooperate with
differing from the types described above.
7
the belts 9 extend around the guide rail 8 as well as
While the invention has been illustrated and described
> around the pair of coaxial bottom- rolls 11, and the sup
as embodied in belt supporting and guiding structure
porting base of the structure carries a tensioning roll
for drafting assemblies, it is not intended to be limited
which hangs in the belts 7 adjacent to their lowermost
to the details shown, since various modi?cations and
portions ‘for the purpose of tensioning these belts 7. The
structural changes may be made without departing in any
supporting frame of the drafting assembly includes an elon
way from the spirit of the present invention.
gated bar which extends horizontally throughout the yen
Without further ‘analysis, the’ foregoing will so fully
tire series of drafting units and to which an upwardly di 55 reveal the gist of the present invention that others can
rected arm is clamped in the manner shown in FIG. 4.
Of course a great number of such arms are clamped to the
bar, and each of these upwardly directed arms is pivotally
connected with a top rolls carrying arm 1, so that the
by applying current knowledge readily‘ adapt it for vari
ous ‘applications without omitting features that, from‘
the standpoint of prior art, fairly constitute essential char;
acteristics of the generic or speci?c aspects of this in
latter is turnable downwardly to the operating position 60 vention and, therefore, such adaptations should and are
illustrated in FIG. 4 as well as upwardly to an inopera:
intended to be comprehended within the‘ meaning and
tive position. FIG. 4 also illustrates the pivoted mem
range of equivalence of the ‘following claims;
bers which are turnably carried by the arm 1 and which
What is claimed as new and desired to be secured by
terminate at their left free ends, as viewed in FIG. 4, in
Letters Patent is:
thesaddles which extend around the shafts between the 65
1. For use in the drafting assembly of a spinning mag _
several pairs of top rolls.
chine, a device for supporting and guiding an upper
When the top rolls carrying arm 1 is turned up to its
drafting belt which extends around a top’ roll, said'device
inoperative or rest position, the device 5 turns in a counter
clockwise direction, as viewed in FIG. 1, around the axle
comprising, in combination, a supporting member includ- ‘ ‘
to its operative position, the operator temporarily turns
integral with said supporting strip means; an elongated
guide rail located forwardly of said supporting strip
ing supporting strip means in which a portion of a shaft
3 and hangs from the latter. When the arm 1 is returned 70 of the top roll is received and connecting strip means
the device 5 together with the belts 9 in a clockwise di
rection so that the belts 9 ‘rest on the belts 7, and there
means and having an upper side, an underside, and a
after the device is again ready for operation.
front edge around which the upper belt passes, said guide
Although the elongated connecting portion 12 of the 75 rail being substantially parallel with the axis of the top
3,059,789
5
roll and at least a portion of said connecting strip means
extending along one side and adjacent to an intermediate
portion of said guide rail, said portion of the connecting
strip means being rigidly connected with the intermediate
portion of said guide rail so ‘as to reinforce the same and
so that the supporting member and the guide rail form
a unitary structure; a leaf spring having a ?rst portion
drafting belts which respectively extend around a pair of
coaxial top rolls, said device comprising, in combination,
a supporting member including a pair of identical sup
porting strips located beside and in alignment with and
spaced from each other and respectively receiving shaft
portions of the top rolls, and a connecting strip integral
with and extending forwardly of said supporting strips;
an elongated guide rail located forwardly of said sup
porting strips and having an upper side, an underside, and
and a second portion extending beyond the upper side of 10 a front edge around which the upper belts pass, said guide
rail being substantially parallel with the axes of the
said guide rail; and belt guiding members rigid with said
top rolls and at least a portion of said connecting strip
unitary structure and extending beyond the upper side
extending ‘dong one side and adjacent to an intermediate
of said guide rail.
received between said portion of the connecting strip
means and the intermediate portion of said guide rail,
portion of said guide rail, said portion of the connecting
2. For use in the drafting assembly of a spinning ma
chine, a device ‘for supporting and guiding an upper draft 15 strip being rigidly connected with the intermediate por
tion of said guide rail so as to reinforce the same and so
ing belt which extends around a top roll, said device
that the supporting member and the guide rail form a
comprising, in combination, a supporting member includ
unitary structure; a leaf spring having a ?rst portion
ing supporting strip means in which a portion of a shaft
received between the intermediate portion of said guide of the top roll is received and connecting strip means
integral with said supporting strip means; an elongated
guide rail located forwardly of said supporting strip
means and having an upper side, an underside, and a
front edge around which the upper belt passes, said guide
rail being substantially parallel with the axis of the top
roll and at least a portion of said connecting strip means
extending along one side and adjacent to an intermediate
portion of said guide rail, said portion of the connecting
strip means being rigidly connected with the intermediate
portion of said guide rail so as to reinforce the same and
rail and said portion of the connecting strip, and a second
portion extending beyond the upper side of the guide mail
for engaging with a saddle of the top rolls for urging
the guide rail downwardly; a pair of guiding members for
each upper drafting belt, one of each pair of said guiding
members’ being integral with said connecting strip and
the other of each pair of said guiding members integral
with said guide rail; and an abutment member carried by
and having a portion extending downwardly from and
adjacent to the front edge of said guide rail to engage
so that the supporting member and the guide rail form 30 with a stop surface of the spinning machine for deter
mining the elevation of said guide rail.
I
a unitary structure, said portion of the connecting strip
5. For use in the drafting assembly of a spinning ma
means extending in the longitudinal direction of said
chine, a device for supporting and guiding a pair of
guide rail and de?ning with said intermediate portion a
upper drafting belts which respectively extend around
space extending transversely to the longitudinal direction
of said guide rail; a substantially S-shaped leaf spring 35 a pair of coaxial top rolls, said device comprising, in
combination, a supporting member including a pair of
having a ?rst portion received in said space and a second
portion extending beyond the upper side of said guide
rail and toward said supporting strip means; and belt
guiding members rigid with said unitary structure and
identical supporting strips located beside and in alignment
with and spaced from each other and respectively receiv
ing shaft portions of the top rolls, and a connecting strip
40 integral with and extending forwardly of said supporting
extending beyond the upper side of said guide rail. _
strips; an elongated guide rail located forwardly of said
3. For use in the drafting assembly of a spinning ma
chine, a device for supporting and guiding a pair of
upper drafting belts which respectively extend around 1a
pair of coaxial top rolls, said device comprising, in com
bination, a supporting member including a pair of iden 45
tical supporting strips located beside and in alignment
with and spaced from each other and respectively receiv
ing shaft portions of the top rolls, and a connecting strip
integral with and extending forwardly of said supporting
strips; and elongated guide rail located forwardly of said 50
supporting strips and having an upper side, ‘an underside,
and a front edge around which the upper belts pass, said
guide rail ‘being substantially parallel with the axes of
the top rolls and at least a portion of said connecting
strip extending along the upper side and adjacent to an
intermediate portion of said guide'rail, said portion of
the connecting strip being rigidly connected with the in
termediate portion of said guide rail so as to reinforce
the same and so that the supporting member and the
supporting strips and having an upper side, an underside,
guide rail ‘form a unitary structure; a leaf spring having
a ?rst portion received between the intermediate portion
guide rail being substantially parallel with the axes of
of said guide rail and said portion of the connecting
the top rolls and ‘at least a portion of said connecting strip
strip, and a second portion extending beyond the upper
extending along one side and adjacent to an intermediate
side of the guide rail for engaging with a saddle of the
portion of said guide rail, said portion of the connecting
top rolls for urging the guide rail downwardly; a ‘pair of
strip being rigidly connected with the intermediate portion
guiding members for each upper drafting belt, said guid
of said guide rail so as to reinforce the same and so that
ing members rigid with said unitary structure and extend
the supporting member and the guide rail form a unitary
ing beyond the upper side of said guide rail; and an ad
structure; a leaf spring having a ?rst portion received be 60 justable screw threadedly carried by and having a head
tween the intermediate portion of said guide rail and said
extending ‘downwardly from and adjacent to the front
portion of the connecting strip, and a second portion ex
edge of said guide rail to engage with a stop surface of
and a front edge around which the upper belts pass, said
tending beyond the upper side of the guide rail for}
the spinning machine for determining the elevation of said
engaging with a saddle of the top rolls for urging the 65 guide rail.
guide rail downwardly; a pair of guiding members for
each upper drafting belt, said guiding members being
rigid with said unitary structure and extending beyond
the upper side of said guide rail; and an abutment mem
References Cited in the file of this patent
UNITED STATES PATENTS
ber carried by and having a portion extending down 7 O 2,708,290
2,789,320
wardly from and adjacent to the ‘front edge of said guide
rail to engage with a stop surface of the spinning ma
2,941,262
Neu et al _____________ __ May 17, 1955
Dausch _____________ __ Apr. 23, 1957
Schiltknecht _______ _.__.__.. June 21, 1960
745,127
Great Britain _________ __ Feb. 22, 1956
chine for determining the elevation of said guide rail.
FOREIGN PATENTS
4. For use in the drafting assembly of a spinning ma
chine, a device for supporting and guiding a pair of upper 75
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