U.S. patent application number 11/337629 was filed with the patent office on 2006-08-03 for control device of the dial in circular hosiery, knitting and similar machines.
Invention is credited to Ettore Lonati, Fausto Lonati, Tiberio Lonati.
Application Number | 20060169002 11/337629 |
Document ID | / |
Family ID | 36406558 |
Filed Date | 2006-08-03 |
United States Patent
Application |
20060169002 |
Kind Code |
A1 |
Lonati; Tiberio ; et
al. |
August 3, 2006 |
Control device of the dial in circular hosiery, knitting and
similar machines
Abstract
This invention concerns a control device of the dial in a
circular hosiery and knitting machine that comprises a cylinder
powered by a motor contrivance, a drive shaft (11) powered by a
motor contrivance, and a dial (12) keyed to a shaft (13) made to
turn by the drive shaft (11) by means of a transmission. This
transmission comprises a toothed belt (16), that mated with the
toothed wheels (14,15) keyed respectively to the drive shaft (11)
and the driven shaft (13), and the rollers or guide pulleys (17,
18) associated with the toothed belt (16), which move independently
to adjust the tautness of the toothed belt and together to create a
movement of the belt involving an angular phase shift between the
dial and cylinder.
Inventors: |
Lonati; Tiberio; (Brescia,
IT) ; Lonati; Fausto; (Brescia, IT) ; Lonati;
Ettore; (Brescia, IT) |
Correspondence
Address: |
MCGLEW & TUTTLE, PC
P.O. BOX 9227
SCARBOROUGH STATION
SCARBOROUGH
NY
10510-9227
US
|
Family ID: |
36406558 |
Appl. No.: |
11/337629 |
Filed: |
January 23, 2006 |
Current U.S.
Class: |
66/8 |
Current CPC
Class: |
D04B 15/16 20130101;
D04B 15/94 20130101; D04B 9/06 20130101 |
Class at
Publication: |
066/008 |
International
Class: |
D04B 9/00 20060101
D04B009/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 28, 2005 |
IT |
BS 2005 A 000007 |
Claims
1. Control device of the dial in a circular hosiery machine with a
cylinder made to turn on its axis driven by a motor contrivance, a
drive shaft (11) on board a support (10) and driven by said motor
contrivance, and where the dial (12) is positioned above the
cylinder and keyed to a shaft (13) made to turn by the drive shaft
(11) by means of a transmission, characterised by the fact that
said transmission comprises a toothed belt (16), which mates with
toothed wheels (14, 15) keyed respectively to the drive shaft (11)
and driven shaft (13), and some rollers or guide pulleys (17, 18)
associated with the toothed belt (16), which move independently to
adjust the tautness of the toothed belt and together to create a
movement of the belt involving an angular phase shift between the
dial and cylinder.
2. Control device of the dial according to claim 1, in which each
roller or tensioning guide pulleys (16, 17) is assembled on a
relative slide (18, 19) and can move crossways to the opposite ends
of the toothed belt on said support.
3. Control device of the dial according to claim 2, in which said
slides holding the guide pulleys can be moved by hand to adjust the
tautness of the toothed belt.
4. Control device of the dial according to claim 2, in which said
slides holding the guide pulleys are fixed to each other for
simultaneous movement to create angular phase shift between the
dial and cylinder, said simultaneous movement being controlled and
managed by a programme.
Description
FIELD OF THE INVENTION
[0001] This invention concerns, in general circular hosiery and
knitting machines in the textile machinery sector and in
particular, when provided, a dial control device in such
machines.
State of the Technique
[0002] As is well known circular machines for hosiery comprise:
[0003] A cylinder holding the needles to form the stitches, which
turns on its axis, driven by a motor by means of a transmission
which envisages a shaft; and when provided
[0004] A dial, supporting the devices for the formation of the
stitch in the shape of needles or sinkers, which is positioned
above the cylinder and keyed to the lower part of a shaft which is
controlled by a drive connected to the cylinder drive shaft to turn
the dial in synchrony with the cylinder itself.
[0005] This drive is usually made up of a number of gears which
must match precisely otherwise the rotation of the cylinder and the
dial will not be synchronised leading to failure or errors in
making the finished article.
[0006] In fact a match between the gears always involves a degree
of play which accumulating may compromise the correct function of
the machine. Furthermore, for particular work, e.g. the transfer of
the stitches from the needles or sinkers of the dial to the
cylinder needles, the dial must be turned at a certain angle with
regard to the cylinder. To avoid these drawbacks and to endeavour
to annul the play, pinions divided into two parts have been made so
that their toothing fit with those of the pinions they couple with
and the half of the pinion that couples with the dial shaft can
turn almost independently from the others to enable the dial to be
angularly out of phase with the cylinder. This however leads to a
further complication in construction.
[0007] Such a gear drive, besides being complex and noisy is also
difficult to calibrate given the high number of gears. Moreover it
is further complicated by the addition of the operating elements
that allow the independent movement of one of the gears so that the
dial can be angularly out of phase with regard to the cylinder when
needed.
OBJECTIVES AND SUMMARY OF THE INVENTION
[0008] A first objective of this invention is to avoid the
abovementioned problems using a drive that guarantees greater
precision in the synchrony between the cylinder and dial, which is
easy to calibrate and which, when required, enables a certain
independent rotation of the dial with regard to the cylinder.
[0009] A second objective of the invention is to propose a drive
device that is less noisy, simpler, and more economical to
make.
[0010] These objectives are achieved, in a circular hosiery machine
with a dial positioned above the cylinder and with a drive that
comprises a toothed belt turning on a first toothed wheel, keyed to
a drive shaft powered by the motor that controls the machine
cylinder, and on a second toothed wheel, keyed to a driven shaft
supporting the dial, and two rollers, called guide pulleys,
associated with the ends of the toothed belt and moving
independently, to keep the belt taut, and together, to cause the
belt to move at an angle out of phase between dial and
cylinder.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] The invention will however be described in more detail with
reference to the enclosed indicative and not limiting drawings, in
which:
[0012] FIG. 1 shows a view in perspective of the drive device
between the cylinder shaft and the dial shaft;
[0013] FIG. 2 shows a view from above: and
[0014] FIG. 3 shows a lateral cross section.
DETAILED DESCRIPTION OF THE INVENTION
[0015] Said drawings of a circular hosiery machine show a support
10 and, on said support, a drive shaft 11, that receives its
turning motion from a motor contrivance (not shown); the same one
that controls the cylinder with needles), and a dial 12 supported
by a respective shaft 13, or driven shaft. For the transmission of
the rotary motion of the drive shaft 11 to the driven shaft 13 the
invention envisages two toothed wheels 14 and 15, keyed
respectively to the drive 11 and driven 13 shafts and a toothed
belt 16 mated with said toothed wheels. In this way, the motor that
activates the machine cylinder sets the drive shaft 11 turning, a
motion that is transmitted to the driven shaft 13 and,
consequently, to the dial 12 by means of the toothed belt 16.
[0016] Furthermore two guide pulleys 17 and 18 are provided, that
is tension rollers, associated with two opposite ends of the
toothed belt 16 and each one assembled on a slide 19 and 20
positioned above the support 10 and facing crossways to the ends of
the belt. The slides 19 and 20 can move independently to enable
tensioning of the toothed belt to be carried out simply and
efficiently so as to hold the connection between the drive and
driven shaft in position, and also together to cause an angular
rotation only of the driven shaft with regard to the drive shaft
and consequently the dial with regard to the cylinder for that work
which requires the cylinder and dial to be out of phase. The slides
19 and 20 can be moved by hand to tension the belt and controlled
and managed by a programme to achieve, when needed during knitting,
out of phasing between the cylinder and the dial.
[0017] In this way an extremely simple device is achieved whereby
the toothed belt replaces a number of gears, it is easy and
inexpensive to make given the lower number of components, it is
more reliable in that the only coupling envisaged is the one
between the toothed belt and wheels with consequent no accumulation
of play, and simple calibration given that the belt is tensioned
mechanically by moving the guide pulleys.
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