EP0867540A1 - A sliver guide for combing machines - Google Patents
A sliver guide for combing machines Download PDFInfo
- Publication number
- EP0867540A1 EP0867540A1 EP97202348A EP97202348A EP0867540A1 EP 0867540 A1 EP0867540 A1 EP 0867540A1 EP 97202348 A EP97202348 A EP 97202348A EP 97202348 A EP97202348 A EP 97202348A EP 0867540 A1 EP0867540 A1 EP 0867540A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- guide plate
- sliver
- slivers
- plate
- guide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G19/00—Combing machines
- D01G19/06—Details
- D01G19/08—Feeding apparatus
Definitions
- the present invention relates to a guide plate for slivers as defined in the preamble of appended Claim 1.
- the web of textile fibres to be combed, or the sliver is unrolled from a reel by means of rotating grooved rollers and extends across the guide plate as far as the oscillating nipper structure which comprises a feed roll and from which the sliver passes to the actual combing machine.
- the sliver As it passes from the grooved rollers to the feed roll, the sliver must always be kept under slight tension. This requirement is hampered, however, by the fact that, in order to carry out the combing operation, together with the detaching rollers and with the rotary comb of the combing machine, the nipper structure performs an oscillatory movement. As a result, the length of the path which the sliver has to follow varies continuously between a minimum value and a maximum value.
- the advance of the sliver must be as smooth and uniform as possible, irrespective of the aforementioned oscillatory motion which, however, tends to cause stoppages and breakage of the sliver because of insufficient or excessive tension.
- the guide plate As described in the publication EP 0409775, it has been proposed to form the guide plate as a single piece of plastics material connected, on the one hand, to the oscillating nipper structure and, on the other hand, to the frame of the machine close to the unrolling roller of the sliver feed unit.
- the plate has a reduced thickness along a bend line perpendicular to the direction of sliding of the sliver so that, in practice, it is constituted by two portions which move relative to one another as if they were joined by a hinge.
- This solution has been found to be quite critical with regard to the selection of the material and is not always satisfactory with regard to the uniformity of the tensioning of the sliver.
- the object of the present invention is to provide a guide plate for slivers which enables the tension of the sliver to be kept uniform and is of simple and reliable construction.
- a sliver feed device is associated with an oscillating Ripper structure 2 in a combing machine, not shown.
- the device 1 comprises a feed unit with a grooved roller 3 which rotates so as to unroll from a reel 20 a sliver 4 to be combed.
- the grooved roller 3 rotates about an axis which is fixed relative to the frame of the device 1, not shown, which in turn is fixed to the frame of the machine.
- the device 1 also comprises a guide plate 5 which is associated with the nipper structure 2 and is arranged to guide the sliver 4 to be combed, which is advancing towards a feed roller 6 of the oscillating nipper structure 2.
- the guide plate 5 is substantially right-angled in shape and comprises a first, substantially quadrangular portion which is arranged horizontally and receives, on its upper face, the sliver from the grooved roller 3.
- the first portion 7 is fixed to the frame of the feed device 1 and is constituted by a metal plate made of stainless steel, advantageously rendered smooth by polishing on its upper face.
- the guide plate 5 also comprises a second portion 8 which is also substantially quadrangular, is arranged in a transverse position relative to the first portion 7, and supplies the sliver to the feed roller 6 of the nipper structure 2.
- the plate 5 also comprises a rounded, bent portion 9 disposed in an intermediate position relative to the first and second portions 7, 8, to complete the right-angled shape. It has a convex part 10 over which the sliver 4 slides before passing over the second portion 8.
- the second portion 8 has a lower end 11 by which it is articulated to the oscillating Ripper structure 2, close to the feed roller 6.
- the second portion 8 Opposite the lower end 11, the second portion 8 also has an upper end 12 by which it is rigidly connected to the bent portion 9, defining therewith a curved sliding surface for the sliver, the second portion 8 being movable and guided by guide means fixed to the frame.
- the bent portion 9 and the second portion 8 are formed in a single piece by a single, suitably-bent metal plate, preferably made of stainless steel and advantageously polished on the bent sliding surface.
- the guide means comprise at least one connecting rod.
- the position in which the connecting rods 30 are connected along the sides of the portion 8, that is, the position of the axis of rotation 13, is selected so as to take account of the movement of the Ripper structure 2 so that the path of the sliver 4 between the grooved roller 3 and the feed roll 6 is substantially constant during the operation of the machine.
- the oscillating nipper structure performs a complex oscillatory motion since one end 21 thereof is restrained on the frame so as to describe an arc about a first point 22 on the frame and its opposite end 23 is restrained so as to describe an arc about a second point 24 on the frame.
- the plate 5 has one end, the lower end 11 of the second portion 8, which follows the motion of the nipper structure 2.
- the distance between the bent portion 9 and the grooved roller 3 remains substantially constant, even though the portion 9 has a free end 14 which describes an arc in space. Owing to the bending, this free end does not interfere with the motion of the sliver 4 which rises and falls, accompanied by the end 14, whilst the first portion 7 helps to guide it.
- the device 1 again comprises a feed unit with a grooved roller 3 which rotates so as to unroll from a reel 20 a sliver 4 to be combed.
- the grooved roller 3 rotates about an axis which is fixed relative to a frame of the device 1, not shown, which in turn is fixed to the frame of the machine.
- the device 1 also comprises a guide plate 5 which is associated with the Ripper structure 2 and is arranged to guide the sliver 4 to be combed which is advancing towards a feed roller 6 of the oscillating Ripper structure 2.
- the guide plate 5 is of a substantially right-angled shape and comprises a first, substantially quadrangular portion 7 which is arranged horizontally, receives the sliver from the grooved roller 3, and, advantageously, is polished on its upper face to facilitate the passage of the sliver 4.
- the guide plate 5 also comprises a second portion 8 which is also substantially quadrangular, is arranged in a position substantially perpendicular to the first portion 7, and supplies the sliver to the feed roll 6 of the nipper structure 2.
- the plate 5 also comprises a rounded, bent portion 9 which is in an intermediate position relative to the first and second portions 7, 8 to complete the right-angled shape. It has a convex part 10 over which the sliver 4 slides before passing over the second portion 8.
- the second portion 8 has a lower end 11 by which it is articulated to the oscillating nipper structure 2 close to the supply roll 6.
- the second portion 8 also has an upper end 12 by which it is connected rigidly to the bent portion 9.
- the first portion 7 is also connected rigidly to the bent portion 9 on the opposite side.
- portion 9 and the second portion 8 define for the sliver a curved sliding surface which also comprises the first portion 7.
- the first portion 7, the bent portion 9 and the second portion 8 are preferably formed in one piece by a suitably-bent metal plate made of stainless steel, advantageously polished on the curved sliding surface.
- the bent portion 9 and hence the entire plate 5 is restrained on the frame of the machine by means of at least one connecting rod.
- the position in which the connecting rods 30 are fixed is selected by the same criterion as in the embodiment described with reference to Figures 1 and 2.
- the intermediate bending point on the portion 9 where the sliver changes direction is also always at a substantially constant distance from the feed roller 6 ( Figure 3 compared with Figure 4) during the movement of the nipper structure 2.
- the distance between the bent portion 9 and the grooved roller 3 remains substantially constant, even though the first portion 7 has a free end 15 which describes an arc in space.
- the free end 15 does not interfere with the movement of the sliver 4 which rises and falls alternately in operation whilst the first portion 7 helps to guide the sliver 4.
- an angle of no less than 70° and no more than 90° is included between the first portion 7 and the second portion 8.
- the guide means of the portion 8 of the plate 5 are constituted by two pins 13' (only one of which is visible in the drawing) which are fixed laterally to the upper end of the portion 8, and by two slots 50 formed in respective plates 51 fixed to the frame and defining a track for the pins 13'.
- the slots 50 may define a straight track, as shown in the drawing, or may be shaped so as to define an arcuate track.
- suitable means of known type, not shown, may be provided for fixing the plates 51 to the frame in an adjustable manner.
- the guide plate according to the invention is structurally simple, is easy to fit and maintain and can be produced at low cost. Moreover, it is substantially immune to wear since it does not have parts which are subject to deformation or bending in operation.
Abstract
The guide plate (5) for slivers (4) described is
associated with an oscillating nipper (2) in a
combing machine in order to guide a sliver (4) to be
combed which is advancing towards a feed roll (6) of
the oscillating nipper (2). To ensure that the
sliver is supplied smoothly, quickly and without
stoppages, the guide plate (5) is of a substantially
right-angled shape and has a first portion (7) which
receives the sliver (4) from a fixed feed unit (3,
20), a second portion (8) which supplies the sliver
(4) to the feed roll (6) close to which it is
articulated to the Ripper (2), and a rounded, bent
intermediate portion (9) which is connected rigidly
to the second portion (8) and has a convex part (10)
over which the sliver (4) slides. Moreover, the
plate (5) is restrained on the frame of the machine
by means of a connecting rod (30).
Description
The present invention relates to a guide plate for
slivers as defined in the preamble of appended Claim
1.
In feed devices for combing machines, the web of
textile fibres to be combed, or the sliver, as it is
conventionally called, is unrolled from a reel by
means of rotating grooved rollers and extends across
the guide plate as far as the oscillating nipper
structure which comprises a feed roll and from which
the sliver passes to the actual combing machine.
As it passes from the grooved rollers to the feed
roll, the sliver must always be kept under slight
tension. This requirement is hampered, however, by
the fact that, in order to carry out the combing
operation, together with the detaching rollers and
with the rotary comb of the combing machine, the
nipper structure performs an oscillatory movement.
As a result, the length of the path which the sliver
has to follow varies continuously between a minimum
value and a maximum value.
For the supply system to operate well, the advance
of the sliver must be as smooth and uniform as
possible, irrespective of the aforementioned
oscillatory motion which, however, tends to cause
stoppages and breakage of the sliver because of
insufficient or excessive tension.
As described in the publication EP 0409775, it has
been proposed to form the guide plate as a single
piece of plastics material connected, on the one
hand, to the oscillating nipper structure and, on
the other hand, to the frame of the machine close to
the unrolling roller of the sliver feed unit. The
plate has a reduced thickness along a bend line
perpendicular to the direction of sliding of the
sliver so that, in practice, it is constituted by
two portions which move relative to one another as
if they were joined by a hinge. This solution has
been found to be quite critical with regard to the
selection of the material and is not always
satisfactory with regard to the uniformity of the
tensioning of the sliver.
The object of the present invention is to provide a
guide plate for slivers which enables the tension of
the sliver to be kept uniform and is of simple and
reliable construction.
This object is achieved by the provision of a guide
plate for slivers as defined and characterized in
Claim 1.
Further characteristics, as well as the advantages
of the guide plate according to the invention will
become clear from the description of two preferred
embodiments given by way of non-limiting example,
with reference to the appended drawings, in which:
In the drawings, a sliver feed device, generally
indicated 1, is associated with an oscillating
Ripper structure 2 in a combing machine, not shown.
In Figures 1 and 2, the device 1 comprises a feed
unit with a grooved roller 3 which rotates so as to
unroll from a reel 20 a sliver 4 to be combed.
The grooved roller 3 rotates about an axis which is
fixed relative to the frame of the device 1, not
shown, which in turn is fixed to the frame of the
machine.
The device 1 also comprises a guide plate 5 which is
associated with the nipper structure 2 and is
arranged to guide the sliver 4 to be combed, which
is advancing towards a feed roller 6 of the
oscillating nipper structure 2.
The guide plate 5 is substantially right-angled in
shape and comprises a first, substantially
quadrangular portion which is arranged horizontally
and receives, on its upper face, the sliver from the
grooved roller 3.
In the present embodiment, the first portion 7 is
fixed to the frame of the feed device 1 and is
constituted by a metal plate made of stainless
steel, advantageously rendered smooth by polishing
on its upper face.
The guide plate 5 also comprises a second portion 8
which is also substantially quadrangular, is
arranged in a transverse position relative to the
first portion 7, and supplies the sliver to the feed
roller 6 of the nipper structure 2.
The plate 5 also comprises a rounded, bent portion
9 disposed in an intermediate position relative to
the first and second portions 7, 8, to complete the
right-angled shape. It has a convex part 10 over
which the sliver 4 slides before passing over the
second portion 8.
The second portion 8 has a lower end 11 by which it
is articulated to the oscillating Ripper structure
2, close to the feed roller 6.
Opposite the lower end 11, the second portion 8 also
has an upper end 12 by which it is rigidly connected
to the bent portion 9, defining therewith a curved
sliding surface for the sliver, the second portion
8 being movable and guided by guide means fixed to
the frame.
In this embodiment, the bent portion 9 and the
second portion 8 are formed in a single piece by a
single, suitably-bent metal plate, preferably made
of stainless steel and advantageously polished on
the bent sliding surface.
The guide means comprise at least one connecting
rod. In this embodiment, there are two identical
connecting rods, of which only one, indicated 30,
is visible in the drawings, and which are fixed for
pivoting on the frame of the machine at one end and
on the two opposite sides of the portion 8, at the
same distance from the axis of articulation to the
Ripper structure 2, at the opposite end. The
position in which the connecting rods 30 are
connected along the sides of the portion 8, that is,
the position of the axis of rotation 13, is selected
so as to take account of the movement of the Ripper
structure 2 so that the path of the sliver 4 between
the grooved roller 3 and the feed roll 6 is
substantially constant during the operation of the
machine.
As is known, the oscillating nipper structure
performs a complex oscillatory motion since one end
21 thereof is restrained on the frame so as to
describe an arc about a first point 22 on the frame
and its opposite end 23 is restrained so as to
describe an arc about a second point 24 on the
frame. As a result of the connections described
above, the plate 5 has one end, the lower end 11 of
the second portion 8, which follows the motion of
the nipper structure 2.
It can be seen that the intermediate bending point
on the portion 9 where the sliver changes direction
is always at a substantially constant distance from
the feed roll 6 (Figure 1, compared with Figure 2)
during the movement of the nipper structure 2.
Similarly, the distance between the bent portion 9
and the grooved roller 3 remains substantially
constant, even though the portion 9 has a free end
14 which describes an arc in space. Owing to the
bending, this free end does not interfere with the
motion of the sliver 4 which rises and falls,
accompanied by the end 14, whilst the first portion
7 helps to guide it.
A second embodiment of the guide plate according to
the invention is described below with reference to
Figures 3 and 4 with the use of the same reference
numerals for identical or equivalent parts.
In this embodiment the device 1 again comprises a
feed unit with a grooved roller 3 which rotates so
as to unroll from a reel 20 a sliver 4 to be combed.
The grooved roller 3 rotates about an axis which is
fixed relative to a frame of the device 1, not
shown, which in turn is fixed to the frame of the
machine.
The device 1 also comprises a guide plate 5 which is
associated with the Ripper structure 2 and is
arranged to guide the sliver 4 to be combed which is
advancing towards a feed roller 6 of the oscillating
Ripper structure 2.
The guide plate 5 is of a substantially right-angled
shape and comprises a first, substantially
quadrangular portion 7 which is arranged
horizontally, receives the sliver from the grooved
roller 3, and, advantageously, is polished on its
upper face to facilitate the passage of the sliver
4.
The guide plate 5 also comprises a second portion 8
which is also substantially quadrangular, is
arranged in a position substantially perpendicular
to the first portion 7, and supplies the sliver to
the feed roll 6 of the nipper structure 2.
The plate 5 also comprises a rounded, bent portion
9 which is in an intermediate position relative to
the first and second portions 7, 8 to complete the
right-angled shape. It has a convex part 10 over
which the sliver 4 slides before passing over the
second portion 8.
The second portion 8 has a lower end 11 by which it
is articulated to the oscillating nipper structure
2 close to the supply roll 6.
The second portion 8 also has an upper end 12 by
which it is connected rigidly to the bent portion 9.
The first portion 7 is also connected rigidly to the
bent portion 9 on the opposite side.
In comparison with the previously-described
embodiment, the portion 9 and the second portion 8
define for the sliver a curved sliding surface which
also comprises the first portion 7.
The first portion 7, the bent portion 9 and the
second portion 8 are preferably formed in one piece
by a suitably-bent metal plate made of stainless
steel, advantageously polished on the curved sliding
surface.
The bent portion 9 and hence the entire plate 5 is
restrained on the frame of the machine by means of
at least one connecting rod. In this embodiment
again, there are two identical rods 30 fixed
pivotably to the two opposite sides of the portion
8 at the same distance from the axis of articulation
to the Ripper structure 2. The position in which
the connecting rods 30 are fixed is selected by the
same criterion as in the embodiment described with
reference to Figures 1 and 2.
In this embodiment, the intermediate bending point
on the portion 9 where the sliver changes direction
is also always at a substantially constant distance
from the feed roller 6 (Figure 3 compared with
Figure 4) during the movement of the nipper
structure 2.
Similarly, the distance between the bent portion 9
and the grooved roller 3 remains substantially
constant, even though the first portion 7 has a free
end 15 which describes an arc in space.
Owing to the bending, the free end 15 does not
interfere with the movement of the sliver 4 which
rises and falls alternately in operation whilst the
first portion 7 helps to guide the sliver 4.
Preferably, in this embodiment of the guide plate 5,
described with reference to Figures 3 and 4, an
angle of no less than 70° and no more than 90° is
included between the first portion 7 and the second
portion 8.
According to the variant shown in Figure 5, the
guide means of the portion 8 of the plate 5 are
constituted by two pins 13' (only one of which is
visible in the drawing) which are fixed laterally to
the upper end of the portion 8, and by two slots 50
formed in respective plates 51 fixed to the frame
and defining a track for the pins 13'. The slots 50
may define a straight track, as shown in the
drawing, or may be shaped so as to define an arcuate
track. To enable the guide means to be adjusted to
the best position, suitable means, of known type,
not shown, may be provided for fixing the plates 51
to the frame in an adjustable manner.
In addition to the advantages mentioned above, the
guide plate according to the invention is
structurally simple, is easy to fit and maintain and
can be produced at low cost. Moreover, it is
substantially immune to wear since it does not have
parts which are subject to deformation or bending in
operation.
In order to satisfy further and contingent
requirements, an expert in the art may apply to the
guide plate for slivers according to the invention
many further modifications and variations all of
which, however, are included within the scope of
protection of the present invention defined by the
appended claims.
Claims (12)
- A guide plate (5) for slivers (4) which is associated with an oscillating Ripper structure (2) in a combing machine in order to guide a sliver (4) to be combed which is advancing towards a feed roll (6) of the oscillating nipper structure (2), the guide plate (5) being of a substantially right-angled shape having a first portion (7) which receives the sliver (4) from a feed unit (3, 20) fixed to the frame of the machine, a second portion (8) which supplies the sliver (4) to the feed roll (6), and a rounded, bent, intermediate portion (9) with a convex part (10) over which the sliver (4) slides, characterized in that the second portion (8) is connected rigidly at one end (12) to the rounded bent portion (9), defining therewith a curved sliding surface guided movably by guide means fixed to the frame and, at an opposite end (11), is articulated to the oscillating Ripper structure (2) close to the feed roll (6).
- A guide plate (5) for slivers (4) according to Claim 1, in which the guide means comprise at least one connecting rod (30).
- A guide plate (6) for slivers (4) according to Claim 1, in which the guide means comprise at least one pin (13') guided along a track (50).
- A guide plate (6) for slivers (4) according to Claim 3, in which the pin (13') is fixed to the second portion (8) and the track is defined by a slot (50) formed in a plate (51) fixed to the frame.
- A guide plate according to Claim 4, in which the plate (51) is fixed to the frame in an adjustable manner.
- A guide plate (5) for slivers (4) according to any one of the preceding claims, in which the first portion (7) is connected rigidly to the rounded, bent portion (9), the curved sliding surface also comprising the first portion (7).
- A guide plate for slivers (4) according to Claim 6, in which an angle of between 70° and 90° is included between the first and second portions (7, 8).
- A guide plate (5) for slivers (4) according to Claim 6 or Claim 7, in which the first portion (7), the rounded, bent portion (9), and the second portion (8) are formed in one piece by a single, suitably-bent metal plate.
- A guide plate (5) for slivers (4) according to Claim 8, in which the metal plate is made of stainless steel.
- A guide plate (5) for slivers (4) according to any one of Claims 1 to 5, in which the first portion (7) is fixed to the frame.
- A guide plate (5) for slivers (4) according to Claim 10, in which the rounded, bent portion (9) and the second portion (8) are formed integrally by a single suitably-bent metal plate.
- A guide plate (5) for slivers (4) according to Claim 11, in which the metal plate is made of stainless steel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT97MI000693A IT1290827B1 (en) | 1997-03-25 | 1997-03-25 | CANVAS GUIDE PLATE FOR COMBING MACHINES |
| ITMI970693 | 1997-03-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0867540A1 true EP0867540A1 (en) | 1998-09-30 |
Family
ID=11376609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97202348A Withdrawn EP0867540A1 (en) | 1997-03-25 | 1997-07-25 | A sliver guide for combing machines |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0867540A1 (en) |
| IT (1) | IT1290827B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105671696A (en) * | 2016-02-22 | 2016-06-15 | 经纬纺织机械股份有限公司 | Elastic tension board of combing machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2559074A (en) * | 1945-05-17 | 1951-07-03 | Terrell Mach Co | Lap changer for combing machines |
| FR1293005A (en) * | 1961-03-20 | 1962-05-11 | Alsacienne Constr Meca | Further training in textile fiber combing machines |
| US3320643A (en) * | 1962-05-07 | 1967-05-23 | Howa Machinery Ltd | Independent swing motion apparatus for feed roller in rectilinear comber |
| JPH03146724A (en) * | 1989-10-26 | 1991-06-21 | Tokyu Kk | Lap reeling and guiding apparatus of comber |
| EP0437807A1 (en) * | 1990-01-17 | 1991-07-24 | Maschinenfabrik Rieter Ag | Method for exchanging the cotton wool roll in at least one combing head of a combing machine |
-
1997
- 1997-03-25 IT IT97MI000693A patent/IT1290827B1/en active IP Right Grant
- 1997-07-25 EP EP97202348A patent/EP0867540A1/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2559074A (en) * | 1945-05-17 | 1951-07-03 | Terrell Mach Co | Lap changer for combing machines |
| FR1293005A (en) * | 1961-03-20 | 1962-05-11 | Alsacienne Constr Meca | Further training in textile fiber combing machines |
| US3320643A (en) * | 1962-05-07 | 1967-05-23 | Howa Machinery Ltd | Independent swing motion apparatus for feed roller in rectilinear comber |
| JPH03146724A (en) * | 1989-10-26 | 1991-06-21 | Tokyu Kk | Lap reeling and guiding apparatus of comber |
| EP0437807A1 (en) * | 1990-01-17 | 1991-07-24 | Maschinenfabrik Rieter Ag | Method for exchanging the cotton wool roll in at least one combing head of a combing machine |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 15, no. 369 (C - 0868) 18 September 1991 (1991-09-18) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105671696A (en) * | 2016-02-22 | 2016-06-15 | 经纬纺织机械股份有限公司 | Elastic tension board of combing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1290827B1 (en) | 1998-12-11 |
| ITMI970693A1 (en) | 1998-09-25 |
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