[0001] The present invention relates to the field of spinning machines, and particularly
to a spinning machine having an automatic doffing device.
[0002] In the existing spinning machine, after being spun, a yarn needs to be wound around
an empty bobbin held by a bobbin clamping arm to form a yarn package. When the yarn
on the bobbin is wound to a predetermined length to achieve a full yarn, it is necessary
to remove the package full of yarn and replace it with a new empty bobbin to continue
spinning.
[0003] In the existing semi-automatic spinning machine, after the bobbin is full of yarn,
the bobbin clamping arms is forcedly opened by hands, and the package full of yarn
is manually pushed down to a package delivery channel. This manner of manually pushing
down the yarn package requires the workers to continuously inspect the full yarn stations,
and manually open the bobbin clamping arm to push down the package full of yarn, which
is inefficient and increases the labor intensity of the workers.
[0004] The existing full-automatic spinning machine adopts a touring service component which
automatically moves to a full yarn station, and the bobbin clamping arm is opened
by a mechanical structure provided on the touring service component to remove and
replace the package with a new bobbin. But this kind of touring service component
has a complex structure while it is only capable of handling one spinning station,
so the cost is high.
[0005] An objective of the present invention is to provide a spinning machine having a doffing
device capable of automatic doffing.
[0006] In order to achieve the above objective, the present invention provides a spinning
machine, comprising a plurality of rows of spinning stations arranged side by side,
each of the spinning stations comprising a bobbin holder for supporting a bobbin and
a winding device for winding a yarn around the bobbin to form a yarn package, wherein
a doffing device is mounted on a frame of each of the spinning stations, the doffing
device comprises a pushing mechanism, and a cylinder is provided at a bottom portion
of the pushing mechanism, the pushing mechanism being capable of catching the dropped
off yarn package by the bottom portion, and being driven by the cylinder to rotate
to push the yarn package from the spinning station to a package transport channel.
[0007] According to one embodiment of the present invention, the pushing mechanism is an
arc-shaped sheet-like supporting plate, a tail end of which is provided with a protrusion
for preventing the yarn package from dropping off.
[0008] According to one embodiment of the present invention, each of the spinning stations
is provided with a fixed wallboard, and the pushing mechanism is pivotally fixed between
adjacent two of the fixed wallboards.
[0009] In order to achieve the above objective, the present invention provides a spinning
machine, comprising a plurality of rows of spinning stations arranged side by side,
each of the spinning stations comprising a bobbin holder for supporting a bobbin and
a winding device for winding a yarn around the bobbin to form a yarn package, wherein
the spinning machine further comprises an automatic doffing device which is mounted
on a frame of each of the spinning stations and capable of pushing a package full
of yarn to a package transport channel.
[0010] According to one embodiment of the present invention, the automatic doffing device
comprises a pushing mechanism that can be mounted on the frame of the spinning machine
and a driving mechanism that can be controlled by a control system to drive the pushing
mechanism to rotate, the pushing mechanism being capable of catching the dropped off
yarn package and being driven by the driving mechanism to rotate to move the yarn
package.
[0011] According to one embodiment of the present invention, the pushing mechanism is an
arc-shaped sheet-like supporting plate.
[0012] According to one embodiment of the present invention, a tail end of the sheet-like
supporting plate is provided with a protrusion for preventing the yarn package from
dropping off.
[0013] According to one embodiment of the present invention, the driving mechanism is a
cylinder.
[0014] According to one embodiment of the present invention, the driving mechanism is a
motor driven linkage mechanism.
[0015] According to one embodiment of the present invention, a fixed wallboard is provided
between the adjacent stations, and the pushing mechanism is rotatably fixed to the
wallboard between the adjacent stations by a pivot.
[0016] Since the spinning machine of the present invention is provided with the automatic
doffing device, when the yarn is wound to achieve a full yarn and a bobbin clamping
arm is opened, the yarn package drops off to the doffing device, and a supporting
plate of the doffing device automatically turns over the dropped off yarn package
and pushes it down to a package transport channel, without needing to push down the
yarn package manually or by hands, thereby achieving an automatic operation. As compared
with the full-automatic spinning machine adopting the touring unit, the spinning machine
of the present invention has the advantages of a simple structure, a convenient maintenance
and a low cost.
Fig. 1 is a partial structural diagram of a single station of a spinning machine of
the present invention.
Fig. 2 is a partial structural diagram in which a bobbin and a winding roller are
omitted to clearly illustrate a doffing device.
Fig. 3 is a partial structural diagram illustrating a doffing device of a spinning
machine of the present invention as viewed from the back thereof.
Fig. 4 is a partial structural diagram of a doffing device of the present invention
not turned over after a full yarn.
Fig. 5 is a partial structural diagram of a doffing device of the present invention
turned over after a full yarn.
[0017] The present invention relates to a spinning machine having a winding mechanism for
winding a spun yarn to form a yarn package, such as a rotor spinning machine, a winding
machine or a twisting machine.
[0018] The spinning machine of the present invention usually comprises a plurality of rows
of spinning stations arranged side by side. Please refer to Fig. 1, where a rotor
spinning machine is taken as an example, and only a part of structure of one spinning
station of the rotor spinning machine is illustrated for simplicity of illustration
and description. As illustrated, the spinning machine of the present invention comprises
a bobbin holder 2 for supporting a bobbin 1 and a winding mechanism for winding a
yarn. In this embodiment, the winding mechanism 3 is a motor-driven winding roller
that is rotated by a motor, thereby driving the bobbin 1 to rotate to wind the yarn
around the bobbin 1. Other structures of the rotor spinning machine are not described
in detail here.
[0019] As described in the background art, in the existing semi-automatic rotor spinning
machine, when the yarn is wound around the bobbin to a predetermined length to achieve
a full yarn, the package full of yarn is pushed down to a package transport channel
by hands. Please refer to Fig. 1 and in conjunction with Figs. 2 and 3, the spinning
machine of the present invention is provided with a doffing device 4 for automatically
pushing down the package full of yarn to a package transport channel (not illustrated).
In this embodiment, the doffing device 4 of the present invention comprises a pushing
plate 41 and a cylinder 42 that drives the pushing plate 41 to move. As illustrated,
the pushing plate 41 is an arc-shaped supporting plate formed by a sheet-like plate,
wherein a front end of the arc-shaped supporting plate is located below the bobbin
1; a protrusion 411 is provided at the front end of the arc-shaped supporting plate
to prevent the yarn package from falling off the supporting plate; baffles 412 are
formed on a rear end of the arc-shaped supporting plate by being bent upwards from
two sides of a surface of the supporting plate and then bent laterally; two lugs 413
are formed to be protruded from a two sides of a bottom surface of the arc-shaped
supporting plate near the rear end. A fixed wallboard 5 is provided between adjacent
two of the stations of the spinning machine, and the pushing plate is pivotally fixed
to the wallboard 5 between the adjacent two of the stations by a fixed shaft 6 extending
through the lug 413 at a bottom portion of the arc-shaped supporting plate. As illustrated
in Fig. 3, two lugs 414 are provided near a middle portion of the bottom surface of
the arc-shaped supporting plate, and a fixed shaft 7 is provided at an end portion
of a piston of the cylinder 42 to extend through the two lugs 414 at the middle portion
of the bottom surface of the supporting plate, thereby connecting the cylinder 42
and the pushing plate 41 to each other. An opening (not numbered) is provided in a
frame of the spinning machine, and one half of the cylinder 42 extends through the
opening of the frame, at which opening the cylinder 42 is fixed to the frame of the
spinning machine by a fixed member (not number). An air inlet pipe 8 at a bottom portion
of the cylinder 42 is connected to a pneumatic control device (not illustrated) through
the wallboard 5.
[0020] Please refer to Fig. 4, when the yarn is wound around the bobbin to achieve a full
yarn state, the bobbin holder can be opened by hands or automatically, and the package
10 full of yarn will fall off from the bobbin holder 2, and drop onto the pushing
plate 41 of the doffing device 4.
[0021] Please refer to Fig. 5, when the package full of yarn drops onto the pushing plate
41 of the doffing device 4, the piston of the cylinder 42 is driven to move by the
pneumatic control device, and the piston of the cylinder 42 pushes up the pushing
plate 41, so that the package 10 full of yarn rolls backwards and falls onto the package
transport channel (not illustrated) of the spinning machine.
[0022] In the foregoing specific embodiment, the pushing plate 41 is an integrally formed
arc-shaped supporting plate in one piece. In other embodiments, the pushing plate
may also be a flat and straight plate. Alternatively, in other embodiments, the supporting
plate may not be plate-shaped, but a structure consisting of several rods, or a hollow
structure, etc. In the foregoing embodiment, the protrusion 411 at the front end of
the pushing plate is a whole ridge along an edge of the pushing plate, and in other
embodiments, it may also be a plurality of bumps provided at an interval or bumps
provided only on two sides of the front end of the supporting plate. The pushing plate
may be integrally formed of a plastic material or formed by bending a metal material.
[0023] In the foregoing embodiment, the pushing plate is driven to move by the cylinder
42, and in other embodiments, the pushing plate may also be driven to move by a motor
through a linkage mechanism.
[0024] In the foregoing embodiment, the pushing plate 41 is fixed to the wallboards of the
adjacent stations of the spinning machine by two pivots. In other embodiments, the
pushing plate 41 may also be fixed by a single shaft, or the wallboard may not be
adopted, but a structure, such as two fixing posts for fixing may be provided.
[0025] Those described above are just some specific embodiments of the technical solutions
of the present invention, and it is impossible for the inventor to illustrate all
the embodiments seriatim, and the scope of the claims of the present invention is
not limited to the foregoing specific embodiments. Any change that can be made by
a person skilled in the art based on the specific embodiments of the specification
without paying a creative labor should fall within the scope of the claims of the
present invention.
1. A spinning machine, comprising a plurality of rows of spinning stations arranged side
by side, each of the spinning stations comprising a bobbin holder for supporting a
bobbin and a winding device for winding a yarn around the bobbin to form a yarn package,
characterized in that a doffing device is mounted on a frame of each of the spinning stations, the doffing
device comprises a pushing mechanism, and a cylinder is provided at a bottom portion
of the pushing mechanism, the pushing mechanism being capable of catching the dropped
off yarn package by the bottom portion, and being driven by the cylinder to rotate
and to push the yarn package from the spinning station to a package transport channel.
2. The spinning machine according to claim 1, characterized in that the pushing mechanism is an arc-shaped sheet-like supporting plate, a tail end of
which is provided with a protrusion for preventing the yarn package from dropping
off.
3. The spinning machine according to claim 1, characterized in that each of the spinning stations is provided with a fixed wallboard, and the pushing
mechanism is pivotally fixed between adjacent two of the fixed wallboards.
4. A spinning machine, comprising a plurality of rows of spinning stations arranged side
by side, each of the spinning stations comprising a bobbin holder for supporting a
bobbin and a winding device for winding a yarn around the bobbin to form a yarn package,
characterized in that the spinning machine further comprises an automatic doffing device which is mounted
on a frame of each of the spinning stations and capable of pushing a package full
of yarn to a package transport channel.
5. The spinning machine according to claim 4, characterized in that the automatic doffing device comprises a pushing mechanism that can be mounted on
the frame of the spinning machine, and a driving mechanism that can be controlled
by a control system to drive the pushing mechanism to rotate, the pushing mechanism
being capable of catching the dropped off yarn package and being driven by the driving
mechanism to rotate to move the yarn package.
6. The spinning machine according to claim 5, characterized in that the pushing mechanism is an arc-shaped sheet-like supporting plate.
7. The spinning machine according to claim 6, characterized in that a tail end of the sheet-like supporting plate is provided with a protrusion for preventing
the yarn package from dropping off.
8. The spinning machine according to claim 5, characterized in that the driving mechanism is a cylinder.
9. The spinning machine according to claim 5, characterized in that the driving mechanism is a motor driven linkage mechanism.
10. The spinning machine according to claim 5, characterized in that a fixed wallboard is provided between the adjacent stations, and the pushing mechanism
is rotatably fixed to the wallboard between the adjacent stations by a pivot.