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Патент USA US3058447

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Oct. 16, 1962
3,058,437
HlDEO HDA
AUTOMATIC BOBBIN WINDER FOR SEWING MACHINE
Filed March 6,. 1959
2 Sheets-Sheet 1
j€9~ 2~
Oct. 16, 1962
HIDEO llDA
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3,058,437
AUTOMATIC BOBBIN WINDER FOR SEWING MACHINE
Filed March 6, 1959
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2 Sheets-Sheet 2
United States Patent 0 ”
1
3,058,437
AUTOMATIC BOBBIN WH‘IDER FOR SEWING
MACHlNE
Hideo Iida, Harnamatsu-shi, Japan, assignor to Prince
Jidosha Kogyo Kabushiki Kaisha, a joint-stock com
pany of Japan
Filed Mar. 6, 195?, Ser. No. 797,791
Ciaims priority, application Japan Mar. 19, 1958
4 Claims. (Cl. 112-220)
The present invention relates to an improved auto
matic bobbin winder for a sewing machine.
The bobbin winder of a conventional sewing machine
is usually unsightly in appearance.
An object of the present invention is to provide a cover
having a simple and attractive appearance for the bobbin
winder of a sewing machine. The cover is arranged to
be easily opened by merely pushing a push button.
3,®58,437
Patented Get. 16, 1962
2
in FIGS. 3, 5, 6 and 9. A spring 11 inserted in a slot of
the bushing 3 urges the lever 8 to a position as shown in
FIGS. 2 and 3 in which the roller 6 is in contact with sup
port plate 7 and the balance wheel 12. In this position,
and in the case of such normal rotation of the balance
Wheel 12 as shown by the arrow direction C of FIG. 2,
the change lever 10 is not in contact with the release
lever 8, so that the rotation of the balance wheel 12 is
transmitted to the main shaft 2 through the roller 6. In
10 this position, the roller 6 is brought in frictional contact
‘with the balance wheel 12 ‘and the support plate 7 by the
pressure of the spring 11 on the release lever 8, through
which the roller 6 extends and by the clockwise rotation
(as viewed in FIG. 2) of the balance wheel 12 and shaft.
When the change lever 10 is brought in contact with the
release lever 8 to push said lever ‘8, the roller 6 is moved
by the lever 8 to the left, FIGS. 2 ‘and 3, ‘and the friction
contact between the balance wheel 12 and the roller 6
Another object of the present invention is to provide an
automatic bobbin winder for a sewing machine, in which
is lost as the roller is moved to a lower position on the
the clutching and unclutching of the balance wheel and
the main shaft are automatically achieved by merely
closing and opening a cover enclosing the bobbin winder
ance wheel 12 is not transmitted to the main shaft 2,
thus permitting idle rotation of the balance wheel 12.
As shown in FIGS. 1 and 4, the ball 13 is held be
wedge shaped support plate 7, and the rotation of the bal
tween a ball supporting wedge shaped (FIG. 2), plate
mechanism and without the use of any conventional drive
25 14 and 'a ball cover 15 through which a part of said ball
stopping means.
A further object of the preset invention is to provide an
automatic bobbin winder for a sewing machine, in which
the balance wheel is automatically clutched with the
main shaft whenever the rotation of the balance wheel
is reversed, thus affording a convenience in the case of
uneven stitching, e.g. thread jamming.
Said objects, other objects and novel features of the
invention will be apparent from the following detailed de
scription, when taken together with the accompanying
drawings, in which the members are indicated by numer
als and in which—
FIG. 1 is a sectional side view for showing the balance
wheel and bushing of one embodiment of the present
invention;
FIG. 2 is a sectional view taken along the line II-—‘II in
FIG. 1;
FIG. 3 is a plan view of the bushing viewed from the
arrow direction A in FIG. 1;
FIG. 4 is a bottom view of the bushing viewed from the
arrow direction B in FIG. 1;
FIG. 5 is a plan view for showing the cover hinge
portion of the embodiment of FIG. 1;
FIG. 6 is a partially sectioned side view for showing
13 extends, said ball being urged to the right, as viewed
in FIG. 2, by a spring 16.
The members 13, 14 and 15 are constructed and ar
ranged as illustrated in FIG. 2. The ball 13 is in light
contact with the balance wheel 12 in the case of such
normal rotation of the balance wheel 12 as shown by
the arrow direction C in FIG. 2, but the ball 13 is
brought in forcible contact with the balance wheel 12 by
the wedge shaped plate 14 in the reverse rotation of the
balance wheel 12, thus engaging the main shaft 2 in re
verse or counter clockwise rotation ‘as viewed in FIG. 2.
Referring to FIGS. 5-10, the device is provided with a
cover 17 which can be opened or closed around a hinge
pin 18 having a hinge spring 24 wound therearound and
with a push button 19 biased outwardly by a spring 20.
In the state of FIG. 6 in which the cover is closed, the
change lever 10 is separated from the release lever 8,
so that the rotation of the balance wheel \12 is transmitted
to the main shaft 2.
However, when the push button 19 is pushed, the ends
of the forked spring 22 are opened by the rightward
sliding of the slide pin 21 (FIGS. 6 and 10), thereby the
ends of the forked spring 22 are released from the knob
the closed state of the cover of the embodiment of FIG. 1;
23 attached to the cover 17, and the cover 117 is opened
IFIG. 7 is a sectional view taken along the line VII—VII 50 by the hinge spring 24. When the cover '17 is opened,
the hinge cam 25 attached to the cover 17 and pivotally
in FIG. 6;
supported by the pin 18 is displaced from the position
FIG. 8 is a sectional view taken along the line VIII—
VIII in FIG. 6;
FIG. 9 is a partially sectioned side View for showing
illustrated in FIG. 6 to the position shown in FIG. 9,
whereby the change lever 10 is turned to the position of
the opened state of the cover of the embodiment of FIG 1; 55 FIG. 9 and brought in contact with the release lever 8.
FIG. 10 is a sectional view taken along the line X—X
The spring 26 biases the change lever 10 into contact with
the hinge cam 25.
in FIG. 6.
Referring to FIGS. 1-4, a main shaft 2 is rotatively
Closing operation of the cover ‘17 is as follows:
supported by a machine arm 1. A bushing 3 is ?xed to
When the cover 17 is manually pushed down against
the shaft 2 by means of a set screw 4 and a pin 5 which 60 the force of the hinge spring 24 (FIG. 9) the ends of the
are clearly shown in ‘FIG. 2, said screw being screwed
forked spring 22 are opened outward by the tapered end
in the bushing 3 and said pin 5 being inserted through
of the knob 23, and the ends of the spring 22 (FIG. 10)
the shaft 2 and bushing 3. The bushing 3 is provided
‘are engaged with the neck portion of the knob 23 upon
with longitudinal slots 33 and 34 in which are respec
the complete closing of the cover. During said closing
tively mounted a friction roller 6 ‘and a friction ball
operation, since the push button 19 is biased outwardly
13. The friction roller 6 is supported on a wedge shaped
by the spring 20 (FIG. 6), the slide pin 21 (FIG. 10)
(-FIG. 2) supporting plate 7 and retained in a hole of a
attached to the button takes the position near the end
release lever 8 so as to be moved in accordance with the
motion of the lever 8‘. The roller supporting plate 7 and
portion of the forked spring 22. Accordingly, said pin
21 does not affect the closing operation of the forked
spring 22.
70
9, the release lever 8 being adapted to being turned
The automatically stopping bobbin Winder mechanism
around said screw 9 by a change lever 10 as clearly shown
composed of a stop latch 27, a ‘stop latch adjusting plate
release lever 8 are attached to the bushing 3 by a screw
8,058,437
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28, a bobbin winder spindle holder 29, a bobbin winder
spindle 30, a bobbin winder pulley 31, and a bobbin
winder friction ring 32 is of the same construction as
the conventional device, but it is constructed to be more
compact than the'conventional device in‘order to be
in claim 1 characterized in ‘that said clutch means in
cluding said connecting means comprises a cam surface
on said cover adjacent said hinge, a bushing affixed to
the main shaft, said bushing having on its exterior sur
enclosed in the cover 17.
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face, diametrically opposite circumferentially extending
slots, said slots having bottoms sloping in opposite di
i
As described ‘above, according to the present inven—
.tion, since the clutching and unclutching of the main
rections of rotation, each slot having a high and a low
end relative to the bushing surface, the high and low ends
of one slot being respectively opposite those of the other;
shaft with and from the balance wheel can be automatical
ly achieved in accordance with the closing and opening of 10 a balance wheel rotatively mounted on said bushing; a
the cover, [the conventional complicated operation of
rolling member mounted in each said slot, said members
motion stopping means is not necessary for achieving said
clutching and unclutching, and also since said clutching
and unclutching are changed’ by the ‘operation of the
frictional roller or ball, the operations for said clutching
and unclutching are gently and positively achieved. ~Fur
having a diameter greater than said high end and less
than said low end of said slots, springs mounted in said
slots biasing said rolling members toward the high ends
15 of said slots, one rolling member adapted to engage said
bushing and said balance wheel at the high 'end of said
t-hermore, ‘when 'it is desirable to reverse the rotation of
the balance wheel in the case of uneven stitching, re
one slot as said balance wheel rotates in the forward
versing of the balance wheel‘can be always assured, be
cause the balance wheel is always in engagement with
the main shaft by the action of a rolling friction member
such as the friction ball or the roller.
direction and disengage from said balance wheel at the
low end in reverse rotation, and other said rolling mem
ber adapted to similarly engage said parts when said
balance wheel rotates in the reverse direction; and means
for positioning said one rolling member in said slot
While I have described particular embodiments of my
against the bias of its associated spring whereby said
invention, it ‘will, of course, be understood that I do not
main shaft is disengaged from said balance wheel for
wish my invention to be limited ‘thereto, since many 25 rotation in the forward direction to drive said bobbin
modi?cations may be made and I, therefore, contemplate
winder only in said forward direction.
by the ‘appended claims to cover all such modi?cations
3; Clutch means as described in claim 2 in which‘ one
as fall within the true idea and scope of my invention.
said rolling member is a cylindrical roller and the other
What I claim is:
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said member is a spherical roller.
1. In a sewing machine having a machine arm, a bal 30
4. An improved automatic bobbin winder as described
ance wheel mounted for rotation in forward andreverse
in claim 2 characterized in that said connecting means
‘ directions on said machine arm, and a main shaft mounted
responsive to the operation of said cover comprises a
for similar rotation in said machine arm, an improved
release lever pivotally mounted at one end on said bush
automatic bobbin winder means mounted on said machine
ing and having a hole in the center portion in which said
arm and having means engageable with said balance wheel
one rolling member is retained, said hole and pivot co
for winding bobbins and comprising: bobbin winder
operating to move said one rolling member from the high
cover means hinged to said'machine arm including means
end to the low end of said associated slot, a change lever
for releasing said cover means to open for winding a
pivotally mounted intermediate its ends, one said end
bobbin and for holding said cover means closed to pro
engaging said release lever for moving said lever about its
vide a cover for said bobbin winder; clutch means
mounted intermediate said main shaft and said balance
wheel and operable to couple and uncouple said balance
pivot, and the other said end engaging a cam surface on
said cover, said cam surface adapted to rotate said change
lever about its pivot as said cover is opened and closed,
wheel with said main shaft for rotation in the forward '
a spring biasing said change lever’s other end into con;
direction and to couple said balance wheel and shaft for
tact with said cam surface whereby when said cover is
rotation in the reverse direction, and said clutch means 45 operated said levers cooperate to move said one rolling
including connecting means operably connecting said
member to an ‘end of its associated slot to disconnect and
cover means to said clutch means, said clutch means be
connect respectively said balance wheel from said main
ing responsive to the opening of said cover means to un
shaft.
couple the balance wheel for rotation in the forward
direction from the main shaft for rotating said bobbin
winder only, and being responsive to the closing of the
cover means to couple said balance wheel to said main
shaft for rotation of said main shaft in the forward di
rection, said main shaft remaining always coupled to said
balance wheel for rotation in the reverse direction for 55
cleaning thread jams and ‘uneven stitching.
, 2. An improved automatic bobbin winder as described
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' References Cited in the ?le of this patent
UNITED STATES PATENTS
1
609,973
1,256,755
1,913,304
Neeley ______________ __ Aug. 30, 1898
White ______________ __ Feb. 19, 1918
Brackett et al. ________ __ June 6, 1933
r 2,430,932
iHohmann ___________ __ NOV. 18, 1947
2,784,917
Bono _______________ __ Mar. 12, 1957
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