U.S. patent application number 15/877886 was filed with the patent office on 2018-07-26 for method for maintaining spinning units of a spinning machine along with a spinning machine.
The applicant listed for this patent is Maschinenfabrik Rieter AG. Invention is credited to Bernd Bahlmann, Frank Baier, Thomas Gruber, Christian Kettner, Mario Maleck, Romeo Pohn, Stephan Weidner-Bohnenberger, Robin Wein.
Application Number | 20180209077 15/877886 |
Document ID | / |
Family ID | 60954924 |
Filed Date | 2018-07-26 |
United States Patent
Application |
20180209077 |
Kind Code |
A1 |
Bahlmann; Bernd ; et
al. |
July 26, 2018 |
Method for Maintaining Spinning Units of a Spinning Machine along
with a Spinning Machine
Abstract
A method and associated spinning machine for maintaining
spinning units of the spinning machine includes a plurality of the
spinning units arranged next to one another and at least one
maintenance device that is movable along the spinning units to
perform maintenance procedures on the spinning units. Prior to
maintenance of a spinning unit by the maintenance device, a housing
of the spinning unit is opened. Subsequently, the maintenance is
performed and then the housing is closed. One or both of the
opening and the closing of the housing is carried out autonomously
with a sealing device operably configured at the spinning unit.
Inventors: |
Bahlmann; Bernd;
(Schrobenhausen, DE) ; Pohn; Romeo;
(Geisenfeld/Rottenegg, DE) ; Gruber; Thomas;
(Ingolstadt, DE) ; Maleck; Mario; (Walting,
DE) ; Baier; Frank; (Hohenwart, DE) ;
Weidner-Bohnenberger; Stephan; (Ingolstadt, DE) ;
Wein; Robin; (Ingolstadt, DE) ; Kettner;
Christian; (Koesching, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Maschinenfabrik Rieter AG |
Winterthur |
|
CH |
|
|
Family ID: |
60954924 |
Appl. No.: |
15/877886 |
Filed: |
January 23, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
D01H 13/005 20130101;
D01H 15/00 20130101; D01H 13/00 20130101; D01H 4/24 20130101; D01H
11/00 20130101; D01H 4/50 20130101; D01H 4/12 20130101; D01H 1/16
20130101 |
International
Class: |
D01H 4/24 20060101
D01H004/24; D01H 13/00 20060101 D01H013/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 24, 2017 |
DE |
10 2017 101 317.2 |
Claims
1-15: (canceled)
16. A method for maintaining spinning units of a spinning machine,
wherein the spinning machine includes a plurality of the spinning
units arranged next to one another and at least one maintenance
device that is movable along the spinning units to perform
maintenance procedures on the spinning units, the method
comprising: prior to maintenance of a spinning unit by the
maintenance device, opening a housing of the spinning unit;
subsequently performing the maintenance of the spinning unit with
the maintenance device, and then closing the housing of the
spinning unit; wherein one or both of the opening and the closing
of the housing is carried out autonomously with a sealing device
operably configured at the spinning unit.
17. The method according to claim 16, wherein the maintenance
comprises one or both of cleaning of a spinning device or a thread
draw-off nozzle at the spinning unit.
18. The method according to claim 16, wherein the housing of the
spinning unit is opened before the maintenance device is positioned
at the spinning unit to perform the maintenance.
19. The method according to claim 16, further comprising detecting
approach of the maintenance device to the spinning unit, and timing
the opening of the housing of the spinning unit with the approach
such that the housing is open when the maintenance device arrives
at the spinning unit.
20. The method according to claim 16, further comprising defining a
surrounding area of the spinning unit, and detecting when the
maintenance device enters the surrounding area.
21. The method according to claim 20, wherein in order to carry out
preventive maintenance of the spinning unit, the spinning unit is
stopped and the opening of the housing of the spinning unit is
performed when the maintenance device is detected in the
surrounding area of the spinning unit.
22. The method according to claim 20, wherein in the event of an
interruption of production of the spinning unit, determination is
made of whether the maintenance device is located in the
surrounding area and, if the maintenance device is located in the
surrounding area, the maintenance device is summoned to the
spinning unit to perform the maintenance, and only then is
production resumed.
23. The method according to claim 16, wherein after the housing is
closed, the maintenance device continues along a travel path
alongside the spinning units.
24. The method according to claim 23, wherein after the maintenance
of the spinning unit, the maintenance device closes the
housing.
25. The method according to claim 24, wherein the maintenance of
the spinning unit is a piecing of the thread carried out by a
piecing device configured at the spinning unit.
26. The method according to claim 16, wherein the sealing device
comprises an actuator configured with a cover on the housing to
open or close the housing.
27. A spinning machine, comprising: a plurality of spinning units
arranged next to one another; a maintenance device movable
alongside of the spinning units for performance of maintenance at
the spinning units; each spinning unit comprising a housing that is
closed by a cover during spinning production, wherein the cover is
movable to an open position to open the housing for maintenance by
the maintenance device; a sealing device configured at the spinning
unit and connected to the cover, the sealing device controllable to
do on or both of autonomously move the cover to the open position
before maintenance by the maintenance device or to autonomously
move the cover to close the housing after maintenance by the
maintenance device.
28. The spinning machine according to claim 27, wherein the sealing
device is controllable to move the cover and open the housing upon
detection of approach of the maintenance device to the spinning
unit so that the housing is open when the maintenance device
reaches the spinning unit.
29. The spinning machine according to claim 27, wherein the
spinning units comprise a piecing device.
30. The pinning machine according to claim 27, wherein the sealing
device comprises an actuator.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to a method for maintaining
spinning units of a spinning machine having a multiple number of
spinning units arranged next to one another and with at least one
maintenance device that is movable along the spinning units and by
means of which the spinning units are maintained. In each case,
prior to the maintenance of a spinning unit, a housing of the
spinning unit is opened, the spinning unit is maintained by the
maintenance device and, after the maintenance of the spinning unit,
the housing is closed again. Furthermore, the invention relates to
a corresponding spinning machine for carrying out the method.
BACKGROUND
[0002] A method and a device for operating an open-end rotor
spinning machine is known from DE 10 2007 048 720 A1. The spinning
machine features a multiple number of similar work stations, each
of which is equipped with a spinning device for producing a thread
and a winding device for creating a cross-wound bobbin, and is
designed in a such a manner that a thread end retracted after a
spinning interruption from the cross-wound bobbin, prepared for the
piecing process and made ready in a piecing position can once again
be pieced on autonomously by the spinning device. Herein,
time-critical steps of the piecing process, such as the defined
return of the prepared thread end into the spinning rotor, the
exact start of the fiber feed and the precise beginning of the
drawing off of the thread out of the open-end spinning device, are
realized by devices operatively associated to the work stations.
Necessary maintenance work prior to the actual start of the piecing
process, such as rotor cleaning, are carried out by a service unit
operating the work stations autonomously. Herein, the service unit
is arranged in a manner movable along the open-end rotor spinning
machine.
[0003] With such a method, one disadvantage is that, before the
auxiliary work can be performed by the movable service unit, the
spinning device must first be opened manually or by the service
unit. However, this is time-consuming, which leads to performance
losses of the spinning machine.
SUMMARY OF THE INVENTION
[0004] Thus, a task of the present invention is to shorten the time
required for the maintenance of the spinning unit, in order to
increase the performance of the spinning machine. Additional
objects and advantages of the invention will be set forth in part
in the following description, or may be obvious from the
description, or may be learned through practice of the
invention.
[0005] The tasks are solved by a method for operating a spinning
machine as described and claimed herein.
[0006] A method for maintaining spinning units of a spinning
machine is proposed. The spinning machine features a multiple
number of spinning units arranged next to one another and at least
one maintenance device. With the assistance of the spinning units,
a yarn is spun from a fiber material. The maintenance device can
also be moved along the spinning units, in order to maintain the
spinning units. The maintenance of the spinning units comprises, in
particular, the cleaning of a spinning rotor. In each case, prior
to the maintenance of a spinning unit, a housing of the spinning
unit is opened, the spinning unit is maintained by the maintenance
device and, after the maintenance of the spinning unit, the housing
is closed again. Furthermore, a spinning machine for carrying out
the method, which features a multiple number of spinning units
arranged next to one another and at least one maintenance device
that can be moved along the spinning units and by means of which
the spinning units can be maintained, is proposed. Each spinning
unit features a housing that is closed during the spinning process
and can be opened to maintain the spinning unit.
[0007] In accordance with the invention, the housing of the
spinning unit to be maintained is autonomously opened with the
assistance of a sealing device arranged at the spinning unit. In
addition or alternatively, the housing of the spinning unit is
autonomously closed by the sealing device after maintenance. As a
result, the spinning unit no longer has to be opened and/or closed
by the maintenance personnel or the maintenance device itself. This
shortens the time required for maintenance by the maintenance
device, such that the maintenance device can in turn maintain more
spinning units. Moreover, the maintenance device no longer has to
wait for the maintenance personnel to open the spinning unit to be
maintained. This increases the productivity of the spinning
machine.
[0008] At the spinning unit, a sealing device is arranged
accordingly for autonomously opening the housing before maintenance
by the maintenance device and/or for autonomously closing the
housing after maintenance by the maintenance device. The sealing
device is accordingly formed to open and/or close the housing.
[0009] It is advantageous if maintenance comprises the cleaning of
a spinning device, in particular a spinning rotor and/or a thread
draw-off nozzle. The cleaning of the spinning device is carried out
by means of a cleaning device arranged in the movable maintenance
device, whereas, however, in an advantageous manner, the spinning
device or the housing of the spinning unit has been previously
opened by the spinning unit itself. However, maintenance may
include other steps, each of which requires the opening of a
housing. The spinning machine can be executed as a rotor spinning
machine, but the invention can also be used on an air-spinning
machine.
[0010] Moreover, it is advantageous if the housing of the spinning
unit to be maintained is opened before the maintenance device has
arrived at the spinning unit or is positioned in front of it. As a
result, the maintenance device can start with maintenance
immediately after it has been positioned in front of the relevant
spinning unit, such that the time that the maintenance device
spends at the spinning unit is even further shortened. The
maintenance device can thereby maintain more spinning units in the
same amount of time.
[0011] Furthermore, it is advantageous if the spinning machine
and/or the spinning unit features a control unit that detects the
approach of the maintenance device at the spinning unit to be
maintained, and controls the sealing device in such a manner that
the housing is opened when the maintenance device reaches the
spinning unit. With the method for maintaining spinning units, the
approach of the maintenance device to the spinning unit to be
maintained is preferably recognized with the assistance of the
control unit of the spinning machine, and the opening of the
housing of the spinning unit to be maintained is thus initiated,
such that the housing is opened if the maintenance device has
reached the spinning unit.
[0012] The approach of the maintenance device can be defined, for
example, as a specific distance of the maintenance device from the
spinning unit, which is detected by means of certain measuring
means. For example, the control unit may constantly measure the
location of the maintenance device on the spinning machine and the
speed at which the maintenance device travels in the direction to
the spinning unit to be maintained. From this, the control unit can
calculate the anticipated travel time of the maintenance device
until it reaches the spinning unit to be maintained, and bring
about the opening of the housing of the spinning unit in advance up
to the reaching of the spinning unit by the maintenance device. In
this case, with the housing open, the spinning unit can wait for
the maintenance device. For this purpose, the control unit must be
configured in an appropriate manner.
[0013] In addition, a time value that indicates how long it takes
to open the spinning unit can be stored in the control unit. Thus,
it is possible to calculate a position of the approaching
maintenance device, upon the reaching of which the opening of the
housing is brought about. As a result, the opening is just
completed when the maintenance device reaches the spinning unit.
With production at the spinning unit to be maintained still
ongoing, production will thereby occur as long as possible at the
spinning unit, and the time in which the spinning unit is at a
standstill will be shortened.
[0014] It is also advantageous if a surrounding area of the
spinning unit to be maintained is defined and, with the assistance
of the control unit of the spinning machine, whether the
maintenance device is located in the surrounding area of the
spinning unit is detected. The opening of the housing is brought
about then and only then if the maintenance device (or, in the case
of multiple maintenance devices, one of the maintenance devices) is
located in the surrounding area and it is thus foreseeable that the
maintenance device will pass by soon. Thereby, the unnecessary or
premature opening of the housing can be avoided.
[0015] In addition, it is advantageous if, in order to carry out
preventive maintenance of the spinning unit, in particular a
preventive rotor cleaning, the spinning unit is stopped and the
opening of the housing of the spinning unit is brought about as
soon as the maintenance device or one of several maintenance
devices is detected in the surrounding area of the spinning unit.
Moreover, for this purpose, the control unit of the spinning
machine must be configured in a suitable manner. The point in time
of the last maintenance can also be taken into account and only if
this dates back too long will, upon the passing by of the
maintenance device, the opening of the spinning unit and the
subsequent maintenance process, in particular the preventive
cleaning of the spinning rotor, be initiated.
[0016] It is also advantageous if, in the event of an interruption
of the production of the spinning unit (for example a thread
break), there is an examination of whether the maintenance device
is located in the surrounding area. The examination may also take
place by means of the control unit of the spinning machine. When
the maintenance device is located in the surrounding area of such
spinning unit, it is summoned for maintenance at the relevant
spinning unit and carries out the maintenance, and only then is
production resumed; in particular, a thread is pieced on again.
This design is thus particularly advantageous with a spinning
machine that has a piecing device configured with the work station.
If, after an interruption of production, a maintenance device is in
the vicinity (that is, it is available with a short travel path),
maintenance, in particular the cleaning of the spinning rotor in
the case of a rotor spinning machine, can be carried out with
little time expenditure prior to the resumption of production. If,
on the other hand, there is no maintenance device in the vicinity,
production is resumed immediately and without maintenance, in order
to keep the downtime of the spinning unit as short as possible.
[0017] It is advantageous if, after the maintenance of the spinning
unit, the housing of the spinning unit is automatically closed by
the sealing device of the spinning unit. The closing may take place
independently of the position of the maintenance device; thus, for
example, already at a point in time at which the maintenance device
is still positioned in front of the spinning unit.
[0018] However, it is particularly advantageous if, after the
maintenance of the spinning unit, the maintenance device assumes
its continued travel, and the housing of the spinning unit is then
automatically closed by the sealing device of the spinning unit and
the production is resumed at the spinning unit. Thus, the
maintenance device can already approach the next spinning unit and
wait, which further increases the productivity of the spinning
machine.
[0019] However, in an alternative design, it is also possible that
the maintenance device still takes over the rapid process of
closing the spinning unit before it assumes its continued
travel.
[0020] In an advantageous additional form of the invention, the
piecing on of a thread is carried out after the automatic closing
of the housing by a piecing device configured with the spinning
unit. As a result, the spinning machine can be maintained more
rapidly overall, such that the performance of the spinning machine
increases.
[0021] It is also advantageous if the sealing device comprises an
actuator, in particular a magnetic switch, a pneumatic and/or a
hydraulic piston and/or an electric motor, which opens and/or
closes the housing.
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Further advantages of the invention are described in the
following embodiments. The following is shown:
[0023] FIG. 1 is a schematic view of a spinning machine with a
multiple number of spinning units and a movable maintenance device;
and
[0024] FIG. 2 is a schematic side view of a spinning unit with a
sealing device.
DETAILED DESCRIPTION
[0025] Reference will now be made to embodiments of the invention,
one or more examples of which are shown in the drawings. Each
embodiment is provided by way of explanation of the invention, and
not as a limitation of the invention. For example features
illustrated or described as part of one embodiment can be combined
with another embodiment to yield still another embodiment. It is
intended that the present invention include these and other
modifications and variations to the embodiments described
herein.
[0026] FIG. 1 shows a schematic view of a spinning machine 1 with a
multiple number of spinning units 2 (whereas, for the sake of
simplicity, only one spinning unit 2 is provided with a reference
sign) and a movable maintenance device 3. The maintenance device 3
is arranged in a movable manner on a rail 4 in a traverse direction
6. Preferably, as illustrated in the present case, the rail 4
extends around the spinning units 2, such that the maintenance
device 3 can reach the other side of the spinning machine 1 from
one side of the spinning machine 1.
[0027] With customary spinning machines 1, it is the case that a
cover 5 (illustrated here by way of example at the spinning unit 2)
of a housing 8 of the spinning units 2 is opened for maintenance by
the maintenance personnel or by the maintenance device 3. The cover
5 of the housing 8 of the spinning unit 2 is pivotable in a
pivoting direction 7, such that the housing 8 of the spinning unit
2 can be opened and/or closed. The opening of the cover 5 by the
maintenance personnel is very time-consuming. Likewise, the opening
of the cover 5 by the maintenance device 3 is still quite
time-consuming, such that the productivity of the spinning machine
1 is reduced. In the case of a rotor spinning machine, the cover 5
is arranged on a housing 8 of the spinning rotor 10 (see FIG. 2),
which is opened.
[0028] With the method in accordance with the invention, to
maintain the spinning machine 1, the housing 8 of the spinning unit
2 is autonomously opened for maintenance. In addition or
alternatively, the housing 8 of the spinning unit 2 is also closed
autonomously after maintenance. The opening and/or closing is
carried out by a sealing device 9, which is illustrated in FIG.
2.
[0029] FIG. 2 shows a schematic side view of a spinning unit 2 with
a sealing device 9 for opening and/or closing the housing 8 of the
spinning unit 2. The present spinning unit 2 is designed as a
spinning unit 2 of a rotor spinning machine, and features a
spinning rotor 10 as a spinning element, which is rotatably mounted
in the housing 8. The thread F produced by the spinning rotor 10 is
withdrawn through a thread draw-off nozzle 11 and is fed to a
winding device, which is not illustrated here. Likewise, the cover
5 for closing the housing 8 is visible. The opening and closing of
the housing 8 takes place by means of the sealing device 9, which
in the present case comprises a threaded spindle with a drive
motor, and pivots the cover away from the housing 8 or pulls it up
to the housing 8. After the housing 8 has been opened by means of
the sealing device 9, the maintenance device 3 can maintain the
spinning unit, in particular clean the spinning rotor 10 of the
spinning unit 2.
[0030] If the maintenance device 3 no longer has to open the
spinning unit 2 itself, during this time, the maintenance device 3
can complete maintenance work at another spinning unit 2 or use the
time for the travel path to the next spinning unit 2 to be
maintained. As a result, a total of more spinning units 2 can be
maintained, such that the productivity of the spinning machine 1
increases.
[0031] Advantageously, the cover 5 of the spinning unit 2 can
already be opened if it is foreseeable that the maintenance device
3 will pass by the spinning unit 2. For example, the spinning
machine 1 comprises a control unit, which is not illustrated here,
in which it is stored that the spinning unit 2 has not been
maintained for a long period of time. In addition, the control unit
recognizes that the maintenance device 3 is moving in the direction
of the spinning unit 2. Preventive maintenance of the spinning unit
2 can be brought about, whereas the spinning unit 2 is stopped, the
housing 8 of the spinning unit 2 is opened and the spinning unit 2
is waiting for the maintenance device 3 with a housing 8 that is
already opened. Thereupon, the maintenance device 3 can maintain
the spinning unit 2 and then immediately proceed to the next
spinning unit 2 to be maintained.
[0032] Preferably, the maintenance operation of the maintenance
device 3 includes the cleaning of the spinning rotor. For this, the
spinning unit 2 is initially stopped and holds the thread firmly,
in order to be able to piece it on after the cleaning of the rotor.
After the rotor has been cleaned, the spinning unit 2 once again
closes autonomously, and once again autonomously pieces on the
thread F. As such, it is particularly advantageous if the spinning
unit 2 has its own piecing device. In principle, however, it is
likewise possible that the maintenance device 3 also carries out
other activities, such as, for example, exchanging the spinning
rotor or piecing on a thread.
[0033] The opening of the cover 5 can be brought about in such a
manner that, upon arrival of the maintenance device 3 at the
spinning unit 2, the opening of the cover 5 of the housing 8 is
just completed. Thus, the spinning unit 2 can produce as long as
possible. In addition, the maintenance device 3 can then start
maintenance immediately.
[0034] If, on the other hand, a thread break occurs at the spinning
unit 2, the control unit can summon the maintenance device 3 to the
spinning unit 2, even before the spinning unit 2 autonomously
starts piecing on the thread again. Thereby, advantageously, a
surrounding area of the spinning unit 2, for example an area at a
distance of up to five spinning units 2, is defined in advance. Of
course, the surrounding area can also be defined in the form of a
maximum permissible period of time for the travel path of the
maintenance device 3 to the spinning unit 2. In the event of a
thread breakage, there will initially be a check, by means of the
control unit of the spinning machine 1, as to whether a maintenance
device 3 is located in the surrounding area of the spinning unit 2.
If this is the case, the spinning unit 2 already opens
autonomously, such that the maintenance device 3 can take up the
maintenance work, in particular the rotor cleaning, immediately
after reaching the spinning unit 2. If, on the other hand, no
maintenance device 3 is present in the surrounding area of the
spinning unit 2, the spinning unit pieces on the thread F again by
means of its own piecing device, without previously carrying out
the cleaning of the rotor, since the spinning unit otherwise would
be unproductively at a standstill for too long.
[0035] This invention is not limited to the illustrated and
described embodiments. In particular, even if the invention has
been described with reference to a rotor spinning machine, the
spinning machine could also be designed as an air-jet spinning
machine. Variations within the scope of the claims, just as the
combination of characteristics, are possible, even if they are
illustrated and described in different embodiments.
LIST OF REFERENCE SIGNS
[0036] 1 Spinning machine [0037] 2 Spinning unit [0038] 3
Maintenance device [0039] 4 Rail [0040] 5 Cover [0041] 6 Traverse
direction [0042] 7 Pivoting direction [0043] 8 Housing [0044] 9
Sealing device [0045] 10 Spinning rotor [0046] 11 Thread draw-off
nozzle [0047] F Thread
* * * * *