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Патент USA US3086571

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April 23, 1963
MASAMI KIMURA
3,086,561
WEFT END EXTRACTOR
Filed Aug. .25, 1960
4 Sheets-Sheet l
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30
April 23, 1963
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MASAMI KIMURA
3,086,561
WEFT END EXTRACTOR
Filed Aug. 25, 1960
4 Sheets-Sheet 2
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April 23, 1963
MASAMI KIMURA
3,086,561
WEFT END EXTRACTOR
Filed Aug. 25, 1960
4 Sheets-Sheet 3
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April 23, 1963
MASAMI KIMURA
3,086,561
WEF‘T END EXTRACTOR
Filed Aug. .25, 1960
4 Sheets-Sheet 4
United States Patent 0
1
3,086,561
WEFT END EXTRACTOR
Masami Kimura, Kasugai-shi, Aichi-ken, Japan, assignor
to Howa Kogyo Kabushiki Kaisha (known as Howa
Machinery Ltd.), Aichi-ken, Japan
Filed Aug. 25, 1960, Ser. No. 51,882
Claims priority, application Japan Aug. 31, 1959
M
1C6
3,086,561
Patented Apr. 23, 1963
2
hold the said yarn ends in such a manner that the hold
thereon will not be lost because of the said tension.
Then, after a conventional pirn changing mechanism,
or a mechanism equivalent thereto, has operated, a weft
yarn cutting mechanism acts to prevent the dangling of
surplus yarn ends from the 'selvage of the woven fabric.
In such a new operating process as described above, in
the case of the present invention, the pirn feeding device
comprises merely a rectangular box which has been suit
This invention relates to cop changing automatic looms, 10 ably prepared, of which one pirn is fed into each shuttle.
and more particularly it relates to a new and improved
A push~up mechanism is provided to prevent a jamming
weft ?lling mechanism in the weft pirn changing mecha- '
or bridge state of the pirn which, otherwise, often occurs.
nism of cop changing, automatic looms.
For picking up the pirn end, an endless travelling brush
is provided, whereby the yarn end is positively drawn out
Among the weft pirn charging mechanisms of cop
changing; ‘automatic looms used heretofore, the most con 15 by the contacting of the yarn surface with the brush. Sub
sequently, the said yarn end is held positively by the mo
ventional have been the system using a circular battery,
tion of the brush in turning through 180 degrees in orien
and the system using a chute guide. In the case of either
of these systems the number of pirns which can be charged
tation. However, since the said yarn end cannot be per
at one time has been approximately 15 to 28. During the ‘
mitted to be held ‘continuously for an inde?nite time by
charging procedure, moreover, it has been necessary for 20 the brush, the said yarn end is removed by a special pin
7 Claims. (Cl. 139-257)
the operator to carry out the operation of pulling out the
yarn ends by hand from the yarns of all pirns, one by one;
cylinder in a west box located therebelow.
In order to make the above-described operational ac
placing the said pirns in order in the magazine, and wind
tions positive and infalliable, an auxiliary ‘air-blast mecha
ing the said pulled-out yarn ends successively about an
nism is provided. The air blast from this mechanism is
end holding member of the mechanism. Although such 25 used near the point where the yarn end is drawn out by
an operation is simple and does not require much special
ized technique, the amount of labour involved is consid
erable. That is, it is common practice‘ to station one
the brush from the pirn, whereby it aids the action of the
brush in holding the yarn end.
It is an advantageous feature of the invention that it is
operator in the pirn supply system for every 70 looms.
possible to provide the above-described mechanisms with
The above-mentioned operations can be accomplished 30 out entailing the need for an additional electric motor or
source of power, the motor for driving the loom being
mechanically; ‘and, by making the number of pirns which
amply suf?cient for the operation of said mechanisms.
can be charged at one time extremely large, and by car
rying out the work of drawing out the ends mechanically,
The details of the invention will be more clearly ap
parent by reference to the following detailed description
it is possible to increase to an extreme degree the number
35 of representative embodiments of the invention when
of looms with respect to‘one operator.
It is an essential object of the present invention to pro
taken ‘in connection with the accompanying illustrations,
vide a new and improved weft ?lling mechanism in cop
changing automatic looms, whereby the above-stated in
in which the same or equivalent parts are designated by
the same reference numerals, and in which:
FIG. 1 is a perspective view, with parts cut away,
showing the internal elements of one embodiment of the
crease in the number of looms which can‘be readily con
trolled by one operator can be economically increased.
It is another object of the invention to provide a weft
invention;
?lling mechanism as stated above which is simple and of
FIG. 2 is a side elevational view, with parts cut away,
showing the essential elements of the embodiment of
low cost in construction, which requires no additional
FIG. 1;
motive power, and which is reliable in operation and
45
economical in maintenance.
FIG. 3 is a plan view, with parts cut away, of the ele
‘ The said objects and other objects and advantages, as
ments shown in FIG. 2;
will presently become ‘apparent, have been achieved by
FIG. 4 is a view showing a weft pirn in the condition
the weft ?lling mechanism of the present invention.
wherein its yarn end is being drawn out by an endless
In one aspect of the invention, the above-mentioned
travelling brush according to the invention;
requirement for increasing the number of pirns to be 50
FIG. 5 is a cross sectional view of one example of the
charged at one time may be satis?ed by merely providing
pin cylinder suitable for use in. the mechanism of this
a suitable magazine box into which the operator needs
invention; and
only to feed the pirns in order, and wherein the pirns,
FIG. 6 is a longitudinal section taken along the center
thereafter, rare alined one by one, precisely in order, with
line
axis of the view shown in FIG. 5.
in a guide chute, and the foremost pirn is placed in a
Very slight differences in con?gurations of certain parts
state of readiness for the next pirn-changing operation.
The result is exactly the same as the positioning of a pirn
exist between FIG. 1 and FIGS. 2 and 3.
Referring to FIGS. :1, 2, and 3, a rectangular magazine
in a conventional pirn changing mechanism.
box 1 is disposed on the outer side of the frame 2 on
The yarn end wound about the head portion of the weft
pirn thus held in position is mechanically unwound. If 60 the weft pirn changing side of a cop-changing automatic
loom, other parts of said loom not being shown. The
the pirn is then to be placed into a shuttle, ‘and the shuttle
magazine box 1 is so constructed that a large number of
is to be picked by a picking stick, a large tension will be
Weft pirns 7 can be contained therein mutually side by
imparted to the weft yarns. Therefore, it is necessary to
3,086, 56 1
a
side with their axes in the transverse direction. A dis
charge outlet 4 is provided at one end of the bottom 3 of
the magazine box 1, the said outlet 4 being so adapted that
the weft pirns contained in the box 1 can be discharged
sidewardly one by one therethrough. The bottom 3 of
the magazine box 1 is sloped downwardly toward the dis
A.
the brush 10 and pin cylinder 15 is indicated in FIGS.
1 and 2.
A pulley 19 is ?xed to the shaft 18 to which
the driving roll 11 of the brush 10 is ?xed, and a pulley
20 and a ratchet wheel 21 are ?xed to the shaft 25 of
the pin cylinder 15. A drive belt 24 is stretched between
the pulleys 19 and 20 over guide sheaves 22 and 23.
A lever 26 is pivoted on the shaft 25 of the pin cylinder
15 and rotatably supports a pawl 27 which is engage
able with the ratchet teeth of the ratchet wheel 21. The
pally predetermined by arresting members 8 and 9, which 10 end of the lever 26 is linked by a connecting rod 30
to the end of a lever 29 which is ?xed to a rocking
are pivoted on rods ?xed to the frame 2 and maintained
shaft 28. Driving power is derived from a lathe (not
in sideward positions by springs, but may be rotated
charge outlet 4, below which is provided a guide chute
6 which guides the pirns in alined succession to a posi
tion below a transferer 5. The said position is princi
against the forces of said springs by pushing down on
their extreme ends.
shown), each reciprocating cycle of which causes the
rod 30 to be thrust upwardly to drive the pin cylinder
In the operation of the above-described feeding mecha 15 15 in the direction of the arrow 17.
One representative actual example of the pin cylinder
nism, a large number of weft pirns 7, with their yarns in
the wound state, ‘are placed transversely side by side in
15 suitable for use in the mechanism of the invention is
illustrated in FIGS. 5 and 6. In the construction shown,
the principal structural member is a cylinder 15a sup
the bottom 3 causes the said pirns 7 to move progressively
toward the discharge outlet 4, through which the said 20 ported rotatably on a shaft 25. The cylindrical wall of
the cylinder ‘15a is provided with a large number of pin
pirns 7 drop one by one into the guide chute 6. The
holes 31, wherein pins 16a having heads 16b are dis
foremost pirn 7a is temporarily arrested and held in
posed in a freely slideable manner with their sharp points
the aforesaid predetermined position below the transferer
pointed outwardly. A cam 32 whose length in the axial
5 by the arresting members 8 and 9.
I
When the weft yarn in the shuttle (not shown) has 25 direction is such as to permit enclosure within the interior
of the cylinder \15a is ?xed to the shaft 25, and the afore
been used up, a conventional pirn changing mechanism
said pin heads 16b are held in constant contact with the
operates, whereby the aforesaid pirn 7a is supplied into
cam surface of cam 32 by springs 33 provided between
the said shuttle by the transferer 5.
the pin heads 16b and the inner cylindrical surface of
'It is one of the most important features of the present
invention that, prior to the supply of the pirn 7a into 30 the cylinder ‘15a. An extended portion 34 is provided
on the side wall of the cylinder 15a and rigidly supports
the shuttle, the yarn end is drawn out positively and held
the aforesaid pulley 20 and the ratchet wheel 21, In
?rmly by a simple mechanism. Said simple mechanism
the assembled state, the shaft 25 is rigidly ?xed so that
consists, essentially, of an endless brush '10‘ which is
the lobe of the cam 32 is pointed toward the nearest
stretched between a driving roll 11 and a tension roll 12
in a run away from said pirn and a run toward said pirn, 35 portion of the brush 10, whereby, as the cylinder 15a
is rotated in the arrow direction ‘17, the pins 16a are
and which is so disposed that a portion of its bristled
forced to protrude outwardly from the surface of the
surface lightly contacts the outer yarn surface at the
cylinder 15a when they approach the brush 10 and claw
end portion of the pirn 7a.
During its operation, the said endless brush moves 40 off the cut yarn ends. However, when the said pins 16a‘
revolve further and draw away from the brush ‘10, they
slowly in the direction of the arrow 13 so that it brushes
are caused to retract progressively into the cylinder 15a‘
the surface of the end portion of the pirn 7a in the
until they are fully retracted below the surface of the
direction toward the extreme end of the said pirn. As
cylinder 15a.
the surface of the winding end of the pirn 7a is thus
By the use of such a pin cylinder as described above‘,
brushed constantly by the bristles of the brush 10 toward
the end of the pirn, the yarn, beginning at its end, is 45 there is no possibility of the yarn ends which have been
clawed off the brush '10‘ clinging to the pins 16a and
gradually loosened from the pirn end, and clings to and
being Wrapped about the surface of the cylinder 15a. ’
is conveyed apart by the brush 10. When, as is indi
As was‘ mentioned before, an air blast mechanism is
cated in FIG. 4, the drawn out yarn 14 has moved around
provided to facilitate the handling of the yarn ends. In
the driving roll 11 and is bent around to the opposite
the representative embodiment illustrated, this mechanism
side, the force with which the brush :10‘ is holding the
comprises, as shown in FIGS. 1, 2 and 3, essentially, a
yarn 14 is substantially large, being suf?cient to prevent
fan 35 driven by a crank shaft 36, supplying air through
the yarn 14 from being pulled oif the brush '10 by the
a pipe '37 to a nozzle 38 whose ejecting opening is directed
tension which is imparted thereon when the pirn 7a is
subsequently supplied into the shuttle and is picked into 55 from behind the pirn 7a toward the brush 10. A portion
of the air ?ow ejected from the nozzle '38 impinges upon
the warp (not shown), which is disposed to the right
the end portion of the pirn 7a and blows the yarn end to
of the mechanisms shown in ‘FIGS. 1 and 3.
ward the brush 10, thereby facilitating the interception of
As the weaving operation of the loom begins with a
the said yarn end by the brush 10. Another portion of
newly supplied pirn, a conventional cutting mechanism
the air ?ow 1blows the drawn-out yarn against the brush
operates to cut the yarn 14 at a point between the sel
the magazine box 1, whereupon the sloped attitude of
vage and the brush 10. If the cut yarn ends were to be
left on the brush 10, they would soon accumulate to an
10, thereby ful?lling an auxiliary function of increasing
the positiveness with which the yarn cling to the brush.
As af-ore-described, since the bottom ‘3 of the magazine
extent whereby the performance of the brush 1-0 would be
box 1 is sloped downwardly toward the discharge outlet
impaired. In order to dispose of the cut yarn ends, a
4, the intended normal movement of the pirns 7 contained
rotating pin cylinder 15 is disposed in the vicinity of 65 in the box 1 is a gradual, a sequential motion toward the
the outer surface of the brush 10 on the side thereof
outlet 4, then a successive drop, one pirn at a time, into
opposite to that of the pirn 7a. The said pin cylinder
the guide chute 6. In actual practice, however, the mutual
15, which has a large number of pins ‘16 about its cylin
pressures between the pirns often cause a so-called bridge
drical surface, is caused to rotate in the direction of the 70 state to {occur above the discharge outlet 4, whereby it
becomes impossible for the pirns to drop naturally into
arrow 17. When the yarn 14, clinging to the brush
the guide chute 6.
10, moves around the driving roll 11 and reaches the
It is another important feature of the invention that the
position of the pins 16 of the cylinder 15, it is here
development of the above-mentioned bridge state is pre
clawed off the brush 10‘ by the pins 16.
One representative example of the method of driving 75 vented, and that, if it should develop, it will be destroyed,
3,086,561
5
whereby the pirns within the magazine box 1 are possi
tively led into the guide chute 6.
r
The said feature is provided by a mechanical device
comprising, essentially, a window 39' in the bottom 3 in
the vicinity of the discharge outlet 4; a plate 40 of special
con?guration disposed in the said window 39; a shaft 41
to which the upstream edge of the plate 40 is ?xed, and
which is supported pivotally by the frame 2; a lever 42
which is ?xed to said shaft 41; and any suitable power
transmission mechanism for transmitting power from
some moving part of the loom to the said lever 42. By
way of example, the lever 42 of the embodiment illus
trated in FIG. 2 is linked by a connecting rod 44 to a
crank stud 43, which is driven by a tappet shaft 45 through
a speed-reducing gear train including worms and worm
Wheels.
In the embodiment illustrated, as the crank stud 43
rotates, its motion is transmitted by the rod 44 to the
6
pin cylinder therearound, a cam ?xed to the said shaft,
springs which held the head of the said pins in contact
with the surface of said cam, and a driving means for ro
tating said pin cylinder, said cam being oriented so as to
cause the ‘full protrusion of the said pins to occur at their
rotational positions nearest the said brush to claw off any
out yarn ends clinging to the said brush.
3. A weft ?lling mechanism according to claim 1, the
mechanism for drawing out and holding the yarn end is
provided with an air blast device which comprises a con
ventional blower fan, an air duct connected to the outlet
of said blower, and a nozzle formed at the working end
of said air duct and disposed behind the said positioned
pirn eject an air toward the said mechanism for drawing
out and holding the yarn end, thereby assisting the func
tion of said mechanism, and another portion of the air
flow is directed to cause the said yarn end to cling more
?rmly to the holding surface of the said mechanism for
lever 42 to cause the plate 40 to oscillate at an extremely
drawing out and holding the yarn end.
low frequency about the shaft 41, thereby moving the 20 4. A weft ?lling mechanism according to claim 1,
pirns in the vicinity of the discharge outlet 4. Accord
wherein the stated pirn storing and feeding means com
ingly, development of the afore-mentioned bridge state
prises: a rectangular magazine box having a bottom which
is almost completely prevented, or, if it should somehow
is sloped downwardly toward the discharge end, on said
develop, is promptly destroyed.
bottom being disposed a large number of weft pirns which
By the use of the combination of mechanisms accord 25 are disposed side by side, transversely to the direction of
ing to the present invention as above described, the pirns
their feeding movement in the said box; a discharge out
within a magazine box are led, one at a time, to a pre
let provided at the said discharge end, said outlet being
determined position; their yarn ends are automatically
designed to discharge the pirns in said box one by one, a
drawn out and held; then the pirns are supplied succes
guide chute connected to said discharge outlet for guiding
sively into the shuttle by a conventional pirn changing 30 the said pirns in successive order to the said predetermined
mechanism. Accordingly, by merely charging the maga
position; and means for preventing the jamming of a so
zine box with a large number of weft pirns, it is possible
called bridge state of the pirns just prior to their discharge
from the said box.
thereafter to operate the loom continuously for a long
period of time without the necessity of any human manip
5. A weft ?lling mechanism according to claim 4,
35 wherein the means for preventing jamming of a so-called
ulation whatsoever.
bridge state of the pirns just prior to their discharge from
Since it is obvious that many changes and modi?ca
the magazine box is a ?ap-like plate installed in an open
tions can be made in the above described details without
ing in the bottom of the said magazine box, slightly in
departing from the nature and spirit of the invention, it
is to be understood that the invention is not to be limited
ward from the discharge end thereof, one edge of the
t othe details described herein except as set forth in the 40 said plate being piv-otally ?xed to an oscillating shaft,
appended claims.
whereby the said plate is caused to undergo pivotal oscil
lation above and below the surface of the bottom of the
What I claim is:
magazine box, thereby imparting nudging motion to the
1. In a weft ?lling mechanism for an automatic pirn
said pirns.
,
changing mechanism of a cop changing, an automatic
6. In a weft ?lling machine according to claim 1
loom which comprises a weft pin storing and feeding 45
means for feeding weft pirns one at a time to a predeter
mined position, arresting and holding members for posi
wherein said travelling brush endless belt is rotated from
the time a pirn is brought to said predetermined position
to the time said pirn is supplied into a shuttle.
tioning and holding each said pirn at the said predeter
7. In an automatic loom having an automatic pirn
mined position, and a mechanism for positively drawing
out and holding the yarn end of the said pirn positioned 50 changing mechanism ‘for successively feeding weft pirns
having longitudinal axes to a predetermined position, an
in the said predetermined position; the construction of
improved means for drawing out and holding the yarn
said mechanism vfor positively drawing out and holding the
end at the tip of each said positioned pirn including means
yarn end of the said pirn comprising an endless, continu
for disposing of said yarn end comprising: an endless
ously travelling brush in the form of an endless belt sup
ported on a driving roll and a tension roll, said brush 55 brush spaced apart, rolls mounted to engage said endless
brush for rotation thereon, said rolls being spaced apart
being disposed in the vicinity of said pirn positioned in
in a plane parallel to the longitudinal axis of said posi
the said predetermined position to brush the constricted
tioned pirn and said brush rotating in runs away from and
end of the said positioned pirn to draw out the yarn end
toward said pirn said brush being arranged for the begin
of the pirn and to hold the same, a pin cylinder which is
provided with a large number of outwardly pointed pins 60 ning of said run away from said positioned pirn to contact
and engage the yarn end at the tip of said positioned pirn,
slidably supported in individual pin holes in the cylindri
said engaged yarn end unwinding and being carried on the
cal wall of the said cylinder and disposed in the proximity
run away from and then on the run toward said positioned
of the said travelling brush on the side opposite that of
pirn, said change in direction ?rmly ?xing said yarn end
the said positioned pirn, the axis of rotation of said cylin
der lbeing substantially parallel to the direction of the 65 in the brush to be held against all yarn tensions; and
means moving normal to said run toward said positioned
motion of said brush, and a device for causing the protru
pirn for combing out each said yarn end from said end
sion of the said pins when they approach the said endless
less brush comprising a stationary shaft mounted parallel
brush and retraction of the said pins when they go away
to the plane of said positioned pirn, a pin cylinder mount
from the said endless brush, position of said protrusion
ed for rotation about its center axis on said shaft, said
70
of the pin is selected to claw off any out yarn ends clinging
rotation being normal to the direction of rotation of said
to the said brush.
endless brush, said pin cylinder being mounted adjacent
2. A weft ?lling mechanism according to claim 1,
the run of said endless brush toward said positioned pirn,
wherein the device for causing the protrusion of the said
and said pin cylinder de?ning rows of radial pin holes,
pins is consisted of a stationary shaft which supports the 75 pins having heads and points extending outwardly, a sta
3,086,561
7“
c
tion‘a'ry camjfdr engaging'said‘ pin heads mounted on- said
shaft and e‘n‘blos'ed‘
said
cylinder,
cam being
‘
References Cited in the ?le of this'patent
P
radially offset on said shaft toward said endless brush, and
-
springs mounted on said pin for biasing them radially
1,095,870
IHPbCTt "'r ----------- -- Mu?’ 5’ 1914
inward, whereby when said cylinder is rotated on said 5
2,601,713
Nleld ---------------- -- J y 1’ 1952
424,817
FOREIGN PATENTS
France ______________ __ Mar. 21, 1911
256,443
Germany. _7 __________ __ Feb. 11, 1913
1,191
1,950
Great Britain ________________ __ 1912
Great Britain ________________ __ 1912
shaft the cam radially prdtrudes'the pins adjacent the end
less brush a maximum distance beyond the perimeter of
the pin cylinder to comb the yarn ends out of said endless
brush, the springs retracting the pins within the perimeter
of the pin cylinder ‘on its opposite side to release said 10
combed out yarn ends clear of said brush.
'
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