Textiles: spinning – twisting – and twining – Apparatus and processes – Twist setting
Reexamination Certificate
2001-02-16
2002-12-03
Calvert, John J. (Department: 3765)
Textiles: spinning, twisting, and twining
Apparatus and processes
Twist setting
C057S350000
Reexamination Certificate
active
06487842
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a drawing and temporary twisting machine. More particularly, the invention relates to an improvement in a layout of a drawing and temporary twisting machine having a winding device provided with an automatic doffing switching device for automatically switching a package in each weight. A full wound package wound up by the winding device is properly doffed by an autodoffer.
In the drawing and temporary twisting machine, a yarn bar pulled out of an original yarn package is drawn and is simultaneously twisted temporarily or is drawn and is then twisted temporarily, and is thus wound upon the package.
Such a typical device is shown in FIG.
2
(
a
). In the device, an original yarn package
11
is carried on a creel stand
10
. A temporary twisting tool
31
, a second feed roller
32
and a second heater
35
of a tube type are carried on a temporary twist—relaxation heat treating device
30
, and a winding device
51
provided with an automatic switching device faces them in opposite directions.
A worker passage A is provided between the winding device
51
and the creel stand
10
mounting the original yarn package. A worker standing on the worker passage A pulls out a yarn bar Y drawn from the original yarn package
11
of the creel stand
10
through a first feed roller
27
, and feeds the yam package
11
to the second heater
35
of a tube type positioned on the inner side of the winding device
51
through the second feed roller
32
by using a suction gun (not shown). Consequently, the yam bar is wounded upon the winding device
51
through the second heater
35
. Next, the worker winds the yarn bar Y ranging from the first feed roller
27
to the second feed roller
32
upon the temporary twisting tool
31
including a triaxial multidisk temporary twisting device through a first heater
41
and a cooling plate
43
. A twist drawn to the yarn bar Y at a predetermined magnification between the first feed roller and the second feed roller and retroacting from the temporary twisting tool
31
along the yarn bar Y is thermally fixed by the first heater
41
and is cooled by the cooling plate
43
, and is then untwisted in the emporary twisting tool
31
, and is thereafter wound upon the winding device
51
through the second heater
35
.
In such a device, the winding device
51
faces the worker passage A. Therefore, it is very hard to automatically doff a package P wound upon the winding device
51
through the autodoffer.
As a countermeasure, an arrangement shown in FIG.
2
(
b
) is proposed. More specifically, the winding device
51
faces the temporary twisting and relaxation heat treating device
30
carrying the temporary twisting tool
31
and the second heater
35
and the worker passage A is provided therebetween, and a passage B on which the autodoffer for automatic doffing can run is provided between the winding device
51
and the creel stand
10
.
In the device shown in FIG.
2
(
b
), the yarn bar Y treated by the second heater
35
runs under a working floor of the worker passage A, and is wound upon a bobbin through the winding device
51
. In the device shown in the drawing, the first feed roller
27
is provided above the winding device
51
, and the worker standing on the worker passage A can carry out the winding work.
For example, however, in the case in which the yarn bar Y which has not been thermally fixed by the first heater
41
is to be subjected to a special processing, that is, preheating, the device shown in FIG.
2
(
b
) is not available. In such a case, for example, a device shown in FIG.
2
(
c
) is applied. In the device shown in FIG.
2
(
c
), a first prefeed roller
21
and a pin type preheater
23
are provided on the upstream side of the first feed roller
27
.
In this case, the first prefeed roller
21
and the preheater
23
are provided. Consequently, a yam passage from the first feed roller
27
is protruded into the worker passage A toward the temporary twisting and relaxation heat treating device
30
by an installation of the preheater
23
. Moreover, in the case in which the pin type preheater
23
is to carry out the preheating, the yam bar Y cannot be brought into an overfeed state and applicable conditions are restricted.
As a countermeasure, the preheater
23
which is not of a pin type is provided separately as shown in FIG.
2
(
d
). The preheater
23
is provided between the winding device
51
and the creel stand
10
.
In this device, the overfeed state can be set in the preheater
23
. However, it is necessary to carry out the winding work through cooperation of two workers, that is, a worker in the vicinity of the preheater
23
and a worker around the first heater
41
. Consequently, a workability is deteriorated. In addition, an installation area is very increased. For this reason, equipment cannot be utilized effectively.
SUMMARY OF THE INVENTION
In consideration of the problems of the related device described above, it is an object of the invention to provide a layout of a drawing and temporary twisting device capable of winding a yarn upon a first feed roller, a first heater and a second heater by one worker, resulting in a very great workability.
Furthermore, it is an object of the invention to provide a layout of a drawing and temporary twisting device in which a yarn can be wound upon a prefeed roller, a preheater, a first feed roller, a first heater and a second heater by one worker also in the case in which a preheater is provided, resulting in a very great workability and a great installation efficiency.
It is an object of the invention to provide a drawing and temporary twisting device capable of carrying out preheating in the preheater in an overfeed state.
Furthermore, it is an object of the invention to provide a drawing and temporary twisting device capable of using both the preheating and the second heater at the same time.
A first aspect of the invention is directed to a drawing and temporary twisting machine wherein a yarn feeding device including a first feed roller for drawing a yarn bar from an original yarn package is provided opposite to a temporary twisting and relaxation heat treating device including a second feed roller having a higher circumferential speed than that of the first feed roller and a temporary twisting tool for twisting the yarn bar and a second heater for carrying out a relaxation heat treatment on a temporary twisted yarn bar with a worker passage interposed therebetween, a first heater and a cooling plate which thermally fix a twist retroacting along the yarn bar are provided in portions positioned above from the yarn feeding device to the temporary twisting and relaxation heat treating device, and a winding device including an automatic switching device is provided on an opposite worker passage side of the temporary twisting and relaxation heat treating device. Thus, the first object can he achieved.
Furthermore, a second aspect of the invention is directed to a drawing and temporary twisting machine wherein a yarn feeding device including a preheater for preheating a yarn bar, a first prefeed roller for drawing the yarn bar from a yarn package and a first feed roller is provided opposite to a temporary twisting and relaxation heat treating device including a second feed roller having a higher circumferential speed than that of the first feed roller and a temporary twisting tool for twisting the yarn bar and a second heater for carrying out a relaxation heat treatment on a temporary twisted yarn bar with a worker passage interposed therebetween, a first heater and a cooling plate which thermally fixes a twist retroacting along the yarn bar are provided in portions positioned above from the yarn feeding device to the temporary twisting and relaxation heat treating device, and a winding device including an automatic switching device is provided on an opposite worker passage side of the temporary twisting and relaxation heat treating device. Thus, the first to fourth objects can be achieved.
Moreover, a third aspect of t
Abe Mikio
Naito Shunzo
Nishimura Yoshihide
Tanae Fumio
Akin Gump Strauss Hauer & Feld L.L.P.
Calvert John J.
Hurley Shaun R
Teijin Seiki Co. Ltd.
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