U.S. patent application number 16/896477 was filed with the patent office on 2020-12-17 for drafting system unit having a weighting arm and a weighting arm for a drafting system unit.
The applicant listed for this patent is Saurer Intelligent Technology AG. Invention is credited to Joachim Diedrich, Karoline Gunther, Michael Korn, Philipp Schiffers, Chandrassekaran Seshayer, Ralf Siewert.
Application Number | 20200392652 16/896477 |
Document ID | / |
Family ID | 1000004917552 |
Filed Date | 2020-12-17 |
United States Patent
Application |
20200392652 |
Kind Code |
A1 |
Diedrich; Joachim ; et
al. |
December 17, 2020 |
DRAFTING SYSTEM UNIT HAVING A WEIGHTING ARM AND A WEIGHTING ARM FOR
A DRAFTING SYSTEM UNIT
Abstract
Drafting system unit having a weighting arm and to a weighting
arm for a drafting system unit for drafting a fiber band at a
workstation of a textile machine, said weighting arm having a
support arm and a top roller body, which is detachably mounted on a
retaining device connected to the support arm. In order to provide
a drafting system having a weighting arm and to provide a weighting
arm for a drafting system unit for drafting a fiber band at a
workstation of a textile machine, which drafting system and
weighting arm can, in a user-friendly manner, be inspected,
repaired and/or adapted to the fiber band material to be drafted
and allow the top roller bodies to be easily replaced, there is
provision for the top roller body to have an actuation section,
which protrudes beyond the support arm in longitudinal axis
direction of the top roller body.
Inventors: |
Diedrich; Joachim;
(Stuttgart, DE) ; Korn; Michael; (Stuttgart,
DE) ; Gunther; Karoline; (Monchengladbach, DE)
; Seshayer; Chandrassekaran; (Herzogenrath, DE) ;
Siewert; Ralf; (Schwalmtal, DE) ; Schiffers;
Philipp; (Erkelenz-Gerderath, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Saurer Intelligent Technology AG |
Arbon |
|
CH |
|
|
Family ID: |
1000004917552 |
Appl. No.: |
16/896477 |
Filed: |
June 9, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
D01H 5/44 20130101; D01H
5/74 20130101; D01H 5/22 20130101; D01H 5/565 20130101 |
International
Class: |
D01H 5/44 20060101
D01H005/44; D01H 5/74 20060101 D01H005/74; D01H 5/56 20060101
D01H005/56; D01H 5/22 20060101 D01H005/22 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 12, 2019 |
DE |
102019115905.9 |
Claims
1. A weighting arm for a drafting system unit for drafting a fiber
band at a workstation of a textile machine, comprising a support
arm, and a top roller body, which is detachably mounted on a
retaining device connected to the support arm, characterized in
that the top roller body has an actuation section, which protrudes
beyond the support arm in a longitudinal axis direction of the top
roller body.
2. The weighting arm according to claim 1, characterized in that
the retaining device has two retainers arranged at a distance from
one another on the support arm.
3. The weighting arm according to claim 1, characterized in that
the top roller body has, at both ends, actuation sections, which
protrude beyond the support arm in the longitudinal axis direction
of the top roller body.
4. The weighting arm according to claim 1, characterized in that
the actuation section is designed to receive an actuating tool.
5. The weighting arm according to claim 1, characterized in that
the actuation section has a surface profile.
6. The weighting arm according to claim 1, characterized in that
the actuation section protrudes beyond the support arm in the
longitudinal axis direction of the top roller body by up to 15
mm.
7. The weighting arm according to claim 6, characterized in that
the actuation section protrudes beyond the support arm in the
longitudinal axis direction of the top roller body by up to 10
mm.
8. The weighting arm according to claim 7, characterized in that
the actuation section protrudes beyond the support arm in the
longitudinal axis direction of the top roller body by up to 5
mm.
9. The weighting arm according to claim 1, characterized in that
the retaining device is designed to apply a spring force acting
radially on the top roller body in order to rotatably positionally
secure the top roller body.
10. The weighting arm according to claim 1, characterized in that
the retainers of the retaining device are designed in such a way
that the retainers apply a spring force acting radially on the top
roller body in order to rotatably positionally secure the top
roller body.
11. A drafting system unit for a textile machine, comprising a
weighting arm having at least one top roller body, the weighting
arm is for the drafting system unit for drafting a fiber band at a
workstation of a textile machine, comprising a support arm, and a
top roller body, which is detachably mounted on a retaining device
connected to the support arm, characterized in that the top roller
body has an actuation section, which protrudes beyond the support
arm in a longitudinal axis direction of the top roller body.
12. The drafting system unit according to claim 11, characterized
in that the drafting system unit has a frame structure, by which
the drafting system unit is detachably arranged on a supporting
frame of the textile machine,
13. The drafting system unit according to claim 12, characterized
in that the drafting system unit is detachably arranged on a
supporting frame of the textile machine in a modular way.
14. The drafting system unit according to claim 11, characterized
in that two weighting arms are provided, which are connected to one
another by a gripping part for joint operation by an operator.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims priority from German National Patent
Application No. DE 10 2019 115 905.9, filed Jun. 12, 2019, entitled
"Streckwerkeinheit mit einem Belastungstrager sowie
Belastungstrager fur eine Streckwerkeinheit", the entire contents
of which are incorporated herein by reference.
FIELD OF THE INVENTION
[0002] The present invention relates to a weighting arm for a
drafting system unit for drafting a fiber band at a workstation of
a textile machine, the weighting arm having: a support arm, and a
top roller body which is rotatably and detachably mounted on a
retaining device connected to the support arm.
BACKGROUND OF THE INVENTION
[0003] Drafting systems of various designs for textile machines are
known from the prior art. They are used to draft or draw a fiber
band, in which case the cross-section of the fiber band is reduced.
During the draft, the fibers must be slid relative to each other as
evenly as possible in order to achieve a fiber band that is as even
as possible.
[0004] In order to draft the fiber band, the drafting systems
generally have a plurality of roller pairs arranged one after the
other, which pairs of rollers, arranged lying on each other, clamp
the fiber band running between them. A roller pair usually consists
of a driven bottom roller and an upper pressure roller, which lies
on the bottom roller and is retained on a weighting arm. A draft of
the fiber band is achieved in that the circumferential speed
increases from roller pair to roller pair in the transporting
direction of the fiber band defined by the direction of rotation of
the roller pairs.
[0005] In a drafting system of the type mentioned above, the
weighting arm is used to press the upper pressure roller, top
roller or top roller body arranged on the weighting arm against the
associated bottom roller with a predefined pressure so that the top
roller body rests, in the operating position, under pressure on the
corresponding bottom roller.
[0006] Known textile machines have a separate drafting system with
several roller pairs arranged in rows at each workstation for each
fiber band to be drafted, with which roller pairs a weighting arm
is associated. For system reasons, the rollers of the drafting
system are subject to wear, which makes it necessary to regularly
replace the rollers. The top roller bodies arranged on the
weighting arm are difficult to access in known drafting systems,
which makes it rather difficult to replace the top roller bodies
and can lead to long downtime of the textile machine in
question.
SUMMARY OF THE INVENTION
[0007] Proceeding from here, the problem addressed by the present
invention is that of providing a drafting system unit having a
weighting arm and providing a weighting arm for a drafting system
unit for drafting a fiber band at a workstation of a textile
machine, which drafting system unit and weighting arm can, in a
user-friendly manner, be inspected, repaired and/or adapted to the
fiber band material to be drafted and in particular allow the top
roller bodies to be easily replaced.
[0008] A drafting system unit for a textile machine according to
the present invention is, in particular, an assembly of a drafting
system of a textile machine, in which case the drafting system unit
can more preferably also be configured as a complete drafting
system depending on its design.
[0009] The present invention solves the problem by means of a
weighting arm for a drafting system unit for drafting a fiber band
at a workstation of a textile machine, comprising a support arm,
and a top roller body, which is detachably mounted on a retaining
device connected to the support arm, characterized in that the top
roller body has an actuation section, which protrudes beyond the
support arm in a longitudinal axis direction of the top roller
body.
[0010] The present invention solves the problem by means of a
drafting system unit for a textile machine, comprising a weighting
arm having at least one top roller body, the weighting arm is for
the drafting system unit for drafting a fiber band at a workstation
of a textile machine, comprising a support arm, and a top roller
body, which is detachably mounted on a retaining device connected
to the support arm, characterized in that the top roller body has
an actuation section, which protrudes beyond the support arm in a
longitudinal axis direction of the top roller body.
[0011] Advantageous further developments of the present invention
are stated herein.
[0012] The textile machine is preferably a spinning machine that
drafts a fiber band, such as a ring spinning machine, a roving
frame, an air spinning machine or the like.
[0013] The weighting arm according to the present invention is
characterized in that the top roller body has an actuation section,
which protrudes beyond the weighting arm in the longitudinal axis
direction of the top roller body. The top roller body is detachably
mounted on a retaining device of the support arm and extends beyond
the support arm in the longitudinal axis direction of the top
roller body. The area protruding beyond the support arm has an
actuation section, which allows the top roller body to be grasped
in a simple and comfortable way in order to move the top roller
body out of the retaining device or to arrange the top roller body
on the retaining device again. In particular, the top roller body
can be mounted on the support arm in such a way that the top roller
body is mounted for rotation relative to the support arm in order
to rotatably carry along a fiber band contact layer arranged on the
top roller body. Alternatively, the top roller body can be
rotationally fixed on the support arm, in which case the fiber band
contact layer arranged on the top roller body is rotatable relative
to the top roller body. Such an arrangement for relative rotation
can be implemented, for example, in accordance with the principle
of a rotatable outer ring of a ball bearing.
[0014] With respect to the installed position of the drafting
system unit on the textile machine, the design according to the
present invention has the result that the actuation section
laterally protrudes beyond the edge of the support arm, where the
actuation section is easily accessible to an operator so that the
top roller body can be quickly replaced.
[0015] The retaining device on the support arm is used to hold the
accordingly rotatable or rotationally fixed top roller body and is
designed in such a way that the top roller body can be removed from
the retaining device and can be reinstalled in the retaining
device.
[0016] According to an advantageous embodiment of the present
invention, there is provision for the retaining device to have two
retainers, which are arranged at a distance from one another on the
support arm. According to this advantageous embodiment of the
present invention, the retaining device has two retainers designed
to support the top roller body, which retainers ensure that the top
roller body is reliably arranged because of the bearings of the
retainers, which bearings preferably engage in the end area of the
top roller body. The retainers can be designed, for example, in
such a way that the top roller body protrudes beyond the support
arm only at one of the retainers, while the other retainer provides
an arrangement of the top roller body flush with or set back from
the support arm.
[0017] However, according to a particularly advantageous embodiment
of the present invention, there is provision for the top roller
body to have, at both ends, actuation sections protruding beyond
the support arm in the longitudinal axis direction of the top
roller body. The embodiment of the top roller body with two
actuation sections, which are arranged at ends of the top roller
body, allows easy access to the top roller body in a particularly
comfortable way, in which case the top roller body can be removed
from and installed on the retaining device particularly quickly and
easily by an operator.
[0018] The actuation sections can in principle be designed as a
simple extension of the top roller body that can be easily grasped
by an operator. The actuation section can particularly
advantageously have a surface profile, which further increases the
grip and thus facilitates the options for simple installation and
removal by the operator.
[0019] The actuation section according to the present invention
allows the top roller bodies to be inspected, replaced and/or
adjusted by the responsible operator without tools. According to a
particularly advantageous embodiment of the present invention, the
actuation section is designed to receive an actuating tool.
According to this embodiment of the present invention, there is
provision for the actuation section to be designed to receive a
tool provided for replacing and installing the top roller body.
This can be, for example, detent marks or grooves distributed over
the circumference, which allow a connection to a suitable tool in a
rotationally fixed arrangement, by means of which tool the top
roller body can then be particularly easily installed and removed
if necessary. The option of using a tool is characterized in that
higher forces can be applied to the top roller bodies by means of
the tool and the top roller bodies can be particularly reliably
adjusted.
[0020] In principle, the longitudinal extent of the top roller body
beyond the support arm is freely selectable and can be freely
selected in accordance with the specified design conditions.
However, according to a particularly advantageous embodiment, there
is provision for the actuation section to protrude beyond the
support arm in the longitudinal axis direction of the top roller
body by up to 15 mm, preferably by up to 10 mm, particularly
preferably by up to 5 mm. A corresponding embodiment of the present
invention ensures the production of economical top roller bodies
having a sufficiently large actuation section, which actuation
section allows the top roller body to be easily and quickly removed
and reinstalled if necessary.
[0021] In principle, the design of the retaining device, more
particularly of the preferably provided retainers, in such a way
that the retaining device or the retainers allow the top roller
body to be detachably arranged can be freely selected. For example,
locking elements which, in the locked position, secure the top
roller body in its operating position and which must be unlocked
before the top roller body is removed can be provided here.
[0022] However, according to an advantageous further development of
the present invention, there is provision for the retaining device
to be designed, more particularly for the retainers to be designed,
in such a way that they apply a spring force acting radially on the
top roller body in order to positionally secure the top roller
body. According to this embodiment of the present invention, there
is provision for the top roller bodies to be secured in their
operating position on the retaining device or the retainers because
of a spring preload. In order to remove the top roller body, the
top roller body must be moved against the spring force, and the top
roller body can be easily removed from the retaining device after
the spring force has been overcome.
[0023] The use of a such spring force clamping allows the top
roller body to be particularly easily and quickly removed and at
the same time ensures reliable positional securing during the
operation of the support arm. The design of the spring force
clamping can be freely selected. In addition to the use of
spring-loaded pressing bodies, there is also the option, for
example, of providing the retainers with a partial mount extending
around the top roller body in the operating position in an angle
range of more than 180.degree., in which case the free legs of the
mount provide the possibility of elastic adjustment in order to
remove and install the top roller body, and in which case the top
roller body can be "clipped" into the retainer.
[0024] The drafting system according to the present invention for a
textile machine, comprising a drafting system unit having a
weighting arm with at least one top roller body, is characterized
in that the weighting arm is designed in accordance with one or
more features described herein. Such a drafting system is
characterized in that the top roller body can be easily replaced if
necessary. In particular, the support arm is pivotably mounted in a
known way, which allows the weighting arm to pivot from an
operating position into a maintenance position, in which the top
roller bodies can be grasped in a particularly easy way by means of
the one or more actuation sections and can be replaced.
[0025] It is particularly advantageously provided that the drafting
system unit has a frame structure, by means of which the drafting
system unit can be detachably arranged on a supporting frame of the
textile machine, more particularly in a modular way. A modularly
exchangeable drafting system unit can thus be provided.
[0026] Further areas of applicability of the present invention will
become apparent from the detailed description provided hereinafter.
It should be understood that the detailed description and specific
examples, while indicating the preferred embodiments of the
invention, are intended for purposes of illustration only and are
not intended to limit the scope of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0027] An embodiment example of the present invention is explained
below with reference to the drawings. In the drawings:
[0028] FIG. 1 shows a perspective view of two adjacently arranged
drafting systems on a textile machine and
[0029] FIG. 2 shows a magnified illustration of a lateral area of a
weighting arm of the drafting systems of FIG. 1.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0030] The following description of the embodiments of the present
invention is merely exemplary in nature and is in no way intended
to limit the invention, its application, or uses. The following
description is provided herein solely by way of example for
purposes of providing an enabling disclosure of the invention, but
does not limit the scope or substance of the invention.
[0031] FIG. 1 shows a perspective view of two drafting system units
1, which are arranged adjacent to one another on a textile machine,
which is not shown here. The drafting system units 1 have, in
particular, a frame structure 10, by means of which the drafting
system units 1 according to this preferred embodiment example can
be modularly detachably positioned on a supporting frame of the
textile machine, which supporting frame, according to this
preferred embodiment example, comprises a supporting tube 9. The
drafting system unit 1 has two weighting arms 7, which are arranged
at a distance from one another and each have a support arm 2 for
supporting top roller bodies 5. The weighting arm 7 can be pivoted
relative to the frame structure 10, and this is facilitated for an
operator by the grasping of a gripping element 8 connecting the
weighting arms 7.
[0032] According to this preferred embodiment example, the
weighting arms 7 are in particular identical and have, in a fiber
band running direction, three retaining devices 3 arranged one
after the other. Each of the retaining devices 3 is formed by a
retainer 4 arranged on the support arm 2 in question. Two retainers
4, arranged along the fiber band running direction at the same
arrangement height and each associated with a support arm 2, are
spaced apart from one another transversely to the fiber band
running direction and are designed to jointly, more particularly
rotatably, and detachably hold a top roller body 5. The top roller
body 5 is positionally secured on the two spaced retainers 4 by
means of a spring clamping force, which, in the case of removal of
the top roller body 5, must be overcome by an operator in order to
be able to move the top roller body 5 out of a mounting opening 11
of the retainers 4.
[0033] According to this preferred embodiment example, for this
purpose the top roller bodies 5 have, at both ends, actuation
sections 6 protruding laterally beyond the edges of the adjacent
support arms 2 facing away from one another, which actuation
sections can be easily grasped by an operator, in which case the
top roller body 5 can be easily removed from and repositioned on
the retainers 4.
[0034] According to an alternative embodiment example not shown
here, the drafting system unit has only one weighting arm with one
support arm, which comprises at least one retaining device for a
top roller body. The retaining device can be formed by two
retainers, which are spaced apart from one another transversely to
the fiber band running direction and function as described above,
the two retainers 4 spaced apart from one another being arranged on
only one support arm. The top roller body can have, at both ends,
actuation sections protruding laterally beyond the edges of the
support arm facing away from one another, by means of which
actuation sections the top roller body can be installed on or
removed from the retainers.
[0035] According to an additional preferred embodiment example, the
drafting system unit can have only one weighting arm having two
support arms, which each comprise at least one retaining device in
an equivalent manner as described above.
LIST OF REFERENCE SIGNS
[0036] 1 Drafting system unit
[0037] 2 Support arm
[0038] 3 Retaining device
[0039] 4 Retainer
[0040] 5 Top roller body
[0041] 6 Actuation section
[0042] 7 Weighting arm
[0043] 8 Gripping element
[0044] 9 Supporting tube
[0045] 10 Frame structure
[0046] 11 Mounting opening
[0047] It will therefore be readily understood by those persons
skilled in the art that the present invention is susceptible of
broad utility and application. Many embodiments and adaptations of
the present invention other than those herein described, as well as
many variations, modifications and equivalent arrangements, will be
apparent from or reasonably suggested by the present invention and
the foregoing description thereof, without departing from the
substance or scope of the present invention. Accordingly, while the
present invention has been described herein in detail in relation
to its preferred embodiment, it is to be understood that this
disclosure is only illustrative and exemplary of the present
invention and is made merely for purposes of providing a full and
enabling disclosure of the invention. The foregoing disclosure is
not intended or to be construed to limit the present invention or
otherwise to exclude any such other embodiments, adaptations,
variations, modifications and equivalent arrangements.
* * * * *