WO2003010374A1 - A yarn pull-out machine - Google Patents

Abstract

A yarn-cleaving machine is disclosed, in which the revolutions of a driving motor are not shifted to forward/reverse directions, the yarn bobbin is firmly secured, the tension of the raw yarn is properly adjusted, and many strands of the yarn are uniformly distributed so as to automatically wind the many strands of the yarn to a plurality of the yarn bobbins by measuring their lengths. The inner circumference of the raw yarn bobbin is pressed with a plurality of annular elastic members, and therefore, either at low speed revolutions or high speed revolutions, the raw yarn bobbin can be prevented from idle revolutions. Further, the lifting part moves up and down without any acceleration and deceleration, and therefore, the cleaved yarns are uniformly wound on the cleaved yarn bobbins. Further, the total length of the cleaved yarns to be wound is calculated in advance to set up a reference value, and the actual wound amount becomes only as much as the reference value.

Description

A YARN PULL-OUT MACHINE

FIELD OF THE INVENTION

The present invention relates to a yarn-cleaving

machine. Particularly, the present invention relates to

a yarn-cleaving machine in which the revolutions of a

driving motor are not shifted to forward/reverse

directions, the raw yarn bobbin is firmly secured, the

tension of the raw yarn is properly adjusted, and many

strands of the yarn are uniformly distributed so as to

automatically wind the many strands of the yarn to a

plurality of cleaved yarn bobbins by measuring their

lengths .

BACKGROUND OF THE INVENTION

The generally known yarn-cleaving machine operates

in such a manner that it divides the raw yarn of a raw yarn

bobbin of a yarn holding machine into a plurality of

strands of yarn to wind them to a plurality of cleaved yarn

bobbins .

This yarn-cleaving machine will be described in more detail below.

As shown in FIG. 1, the general yarn-cleaving machine

includes: a frame 1; a yarn drum frame 2 installed on a

side of the frame 1; and a rectangular frame steel plate

3 installed above the yarn drum frame 2.

A cleaved yarn guide cap 4 is installed above and

outside the frame 1, and a plurality of cleaved yarn bobbin

shaft pins are vertically installed upon the top of the

frame 1 and around the cleaved yarn guide cap 4.

The cleaved yarn guide cap 4 is installed coaxially

with a lifting device (not illustrated) which is installed

within the frame 1. The plurality of the cleaved yarn

bobbin revolution pins 5 are connected through a belt (not

illustrated) to a pulley (not illustrated) which is

installed to a revolution shaft of a driving motor (not

illustrated) which is in turn installed within the frame

A yarn drum 7 is installed on a raw yarn drum

revolution pin 6 in the lower portion of the raw yarn drum

frame 2, while a tension device 8 is installed above the

raw yarn drum 7. A plurality of guide rollers 9 are installed on the

rectangular frame steel plate 3.

The conventional yarn-cleaving machine constituted

as above will be described as to its operations.

First a raw yarn bobbin 10 is installed coaxially

to the yarn drum 7, and the free end of the raw yarn 11

which is wound on the raw yarn bobbin 10 is cleaved into

a plurality of strands. The plurality of the yarn strands

11' are engagingly passed through the tension device 8,

the rectangular frame steel plate 3 and the cleaved yarn

guide cap 4, (that is, their guide rollers 9 and 9' ) . The

plurality of the yarn strands are respectively hooked to

a plurality of guide hooks 12, and then, each of the yarn

strands is manually secured to each of cleaved yarn bobbins

13.

Thereafter, if the plurality of the cleaved yarn

bobbin revolution pins 5 are rotated by the driving motor,

then the raw yarn bobbin 10 revolves together with the

cleaved yarn bobbin revolution pins 5, the former and the

latter supporting the raw yarn 11 and the cleaved yarn 11'

respectively. At the same time, the raw yarn drum 7 and the raw yarn drum revolution pin 6 revolve, and thus, the

raw yarn 11 is cleaved into a plurality of cleaved yarn

strands to be wound around the cleaved yarn bobbins 13

respectively.

Under this condition, the length of the raw yarn which

extends from the raw yarn bobbin 10 toward the cleaved yarn

bobbins 13 is arbitrarily judged by the operating person

by looking at the wound amounts of the cleaved yarn bobbins

and the residual amount of the raw yarn of the raw yarn

bobbin 10. Further, the motor is provided with a clutch

for enabling shifts of revolutions to forward/reverse.

Accordingly, the motor is vulnerable to the humidity, and

if foreign materials such as oil, water and dust intrude,

then a slip occurs, with the result that the cleaved yarn

strands are non-uni formly wound on the bobbins during the

accelerations and decelerations upon shifting to forward

or reverse .

Further, when the raw yarn is unwound, a proper

tension has to be given so as for the cleaved yarn strands

to be firmly wound on the bobbins with a proper hardness,

and this can be achieved only if the raw yarn drum revolves at the same revolution speed as that of the raw yarn drum

revolution pin.

However, conventionally the total length of the

cleaved yarn wound on the bobbins or the unwound and

carried length of the raw yarn is arbitrarily judged by

the operating person. On that standard, the operating

person stopped the machine, and therefore, the total wound

amount of the cleaved yarn is not uniform, with the result

that the products are not reliable.

Further, since the motor is provided with a clutch,

the motor is vulnerable to the humidity, and if foreign

materials such as oil, water and dust intrude, then a slip

occurs, with the result that the cleaved yarn strands are

non-uni formly wound on the bobbins during the

accelerations and decelerations upon shifting to forward

or reverse. Further, the conventional tension device is

not capable of automatically adjusting the tension of the

raw yarn, and therefore, when cleaving the raw yarn, the

raw yarn is subjected to a fatigue, with the result that

the cleaved yarns are loosely wound on the bobbins.

Further, there is no securing device for the raw yarn bobbin, and therefore, the raw yarn bobbin idly revolves.

As a result, the cleaved yarns are loosely wound on the

cleaved yarn bobbins, and therefore, the final product

cannot be used in the fabric machine.

5 SUMMARY OF THE INVENTION

The present invention is intended to overcome the

above described disadvantages of the conventional

technique .

Therefore, it is an object of the present invention

L0 to provide a yarn-cleaving machine in which a lifting part

ascends and descends without acceleration or deceleration

so as to make the yarn wound uniformly on cleaved yarn

bobbins, the length of the yarn to be wound from the raw

yarn bobbin to the cleaved yarn bobbins is pre-det ermined

.5 to be compared with the current information, and an

automatic control is carried out so as to make the

predetermined value and the current carriage value equal

to each other.

It is another object of the present invention to

0 provide a yarn-cleaving machine in which the tension of

the raw yarn can be accurately adjusted during its unwinding, the tension of the raw yarn is maintained at

the reference value (predetermined value) so as to

prevent any fatigue in the raw yarn, and the inside

circumference of raw yarn bobbin of the raw yarn drum is

pressed with an annular elastic member so as to prevent

any idle revolutions of the raw yarn bobbin during the

low and high revolution speeds, thereby improving the

productivity and the reliability of the products.

In achieving the above objects, the yarn- cleaving

machine according to the present invention includes: a

base body with frames and power devices installed

therein; a yarn cleaving part formed above the base body

and including a cleaved yarn guide cap and a plurality

of cleaved yarn bobbin revolution pins; a driving part

installed within the base body, for lifting or rotating

the yarn-cleaving part; a raw yarn drum-securing part

installed below a raw yarn drum frame, for securing the

raw yarn drum; a raw yarn tension-adjusting device

installed above the raw yarn drum frame, for adjusting

a tension of the raw yarn; and

a guide part consisting of a plurality of guide rollers and formed above the tension-adjusting device,

characterized in that:

the driving part has a lifting bar, the lifting bar

being installed within the base body through a vertical

guide cylinder of a central top of the base body, an upper

end of the lifting bar being attached to a bottom center

of a round conical cap, the round conical cap including

a plurality of guide hooks at certain constant intervals;

and a vertical guide bar is secured in front of and

separatedly from the lifting bar, with, both ends of the

guide bar being secured to upper and lower inside portions

of the base body;

the lifting bar is fastened with a bolt into a

fastening hole; a guide bar is inserted into a guide hole;

a pair of solenoids are installed in opposite directions

to outsides of respective supporting parts, the

supporting parts protruding to left and right sides; a

lifting part is connected through a string to a balance

weight; two picking bars are hinge-coupled to a lifting

bracket, one end of the picking bar being

contacted/separated to and from an inside of the supporting part, and another end of the picking bar being

hinge -coupled to an actuation bar of the solenoid;

a lifting pulley is installed in an upper portion

of the base body so as to make a lifting belt disposed

into between the supporting parts of the lifting bracket

and one ends of the picking bars; a decelerator is

installed in a lower portion of the base body so as to

make an output pulley directly disposed below the lifting

pulley; a lifting power part is connected to a driving

motor, and includes an input pulley of the decelerator,

a first tension belt, upper and lower pulleys of a passive

revolution shaft, a second tension belt, an intermediate

pulley, a third tension belt, and the driving motor; and

an adjusting bar and a guide bar are vertically and

separatedly installed between upper and lower plates, one

end of each of the plates being secured to the guide bar,

and another end of each of the plates protruding to one

side;

the adjusting bar is rotatably installed; both ends

of the guide bar are rotatably secured; upper and lower

movable beams are rotatably and mutually separatedly installed on the adjusting bar; one end of each of the

movable beams project to receive the lifting bracket into

between the two ends of the movable beams; another end

of each of the movable beams receives a lift adjusting

part, the lift adjusting part having a guide slot; a step

motor of a lower portion of the adjusting bar is meshed

to first and second pinion gears; and a contact terminal

is installed on one end of each of the movable beams, the

lifting bracket being disposed between the two movable

beams; and

a sensing part includes: a limit switch installed

on the guide bar contactedly to another end of each of

the movable beams; and a gap adjusting bar installed to

a lower plate contactedly to its terminal part; and a

control part causing the step motor to be rotated by

certain angular degrees in response to sensed signals of

the contact terminal, and supplies or withholds a power

to and from the solenoid, and supplies or withholds the

power to and from the driving motor in response to sensed

signals of the limit switch.

Meanwhile, the guide roller of the guide part include s :

a measuring part consisting of: a yarn carriage

guide rolling device with a plurality of through holes and

rim parts formed between a hub and an outer circumference,

and with its shaft installed by using a round bearing to

a shaft pin, with one end of the pin being secured to a

rectangular pipe frame; and a revolution speed sensor with

its leading end nearing to a rear face of the rolling device,

and with its rear end being secured to the frame so as to

make the rear end disposed on an axis of the through hole;

a display part consisting of: a digital display A

for displaying a revolution value of the rolling device

as sensed by the revolution sensor in numerals; and a

digital display B for arbitrarily inputting a revolution

value of the rolling device; and

a second control part (CPU) for receiving an

information from the revolution sensor to display the

information to the digital display A in numerals, for

decreasing the revolution value on finding a closeness

between a pre-set information and a current sensed

information after comparison of the pre-set information of the digital display B with the currently sensed

information, and for stopping the driving motor on finding

a correspondence between the pre-set information and the

currently sensed information by controlling a power

variable switch.

The tension-adjusting device includes: a securing

part installed on a raw yarn drum frame of a side of the

yarn cleaving machine to be rotated interlockingly to the

cleaved yarn bobbins, and secured to a fixed bearing by

means of a bolt, and having a securing rod with a securing

slot formed on a securing edge, and having a rotatable

wheel pin on another side, the wheel pin being rotated by

a connection piece, and the connection piece being secured

to the securing part;

a tension adjustment part, with its one end being

installed in the securing slot of the securing rod of the

securing part, with its another end being installed on an

actuation piece of the wheel pin, with a pair of brake shoes

being installed on a connection spring of the securing rod,

with a lining being formed on each of the brake shoes to

surround its outside, and with a brake drum being secured to a rear end of the raw yarn drum revolution pin so as

to be int erlockingly revolved together with the raw yarn

drum revolution pin;

a tension transmission part, with a tension

transmitting rod being connected to the connection pin of

the securing part to decelerate the tension adjustment

part, with an upper end of the tension transmitting rod

being connected to a tension rod, the tension rod moving

up and down in accordance with the tension of the raw yarn,

so as to transmit the tension of the raw yarn; and

a tension setting part, with one end of a tension

adjustment spring being connected to another end of the

tension transmission part, another end of the tension

adjustment spring being connected to an actuation device,

the actuation device having a guide hole on one side and

a spiral slot in its inside, with an adjustment handle

being formed to cause the actuation device to move up and

down, with an actuation rod having a spiral lines on its

outside, and with a guide rod being inserted into the guide

hole to make the actuation device move up and down without

being rotated. The raw yarn drum securing part includes: the raw

yarn drum revolution pin, with a nut hole being formed on

its leading end in an axial direction, and with a fastening

key projecting from its outside; a raw yarn drum axially

installed to the raw yarn drum revolution pin, and

including a left drum and an intermediate drum, and

including a right drum, the two drums (left and right

drums) having annular recesses respectively, and the right

drum having a key slot in the axial direction;

a plurality of bolt bars for fastening the left and

right drums to the intermediate drum; an adjustment bolt

for being fastened into the nut hole to perform

reciprocation movements during forward/reverse

revolutions over a certain distance; a tension spring

installed between the bottom of the head of the adjustment

bolt and the left drum to press the left drum in the axial

direction; and annular elastic members axially installed

respectively within annular recesses of the left and right

drums so as to be expanded in the radial direction upon

a close contact of the drum. BRIEF DESCRIPTION OF THE DRAWINGS

The above objects and other advantages of the present

invention will become more apparent by describing in

detail the preferred embodiment of the present invention

with reference to the attached drawings in which:

FIG. 1 illustrates the conventional yarn-cleaving

machine ;

FIG. 2 is a frontal sectional view of the driving

part of the yarn-cleaving machine according to the

present invention;

FIG. 3 is a side view showing the assembled state

of the lifting bracket and the lifting bar of the driving

part of the yarn-cleaving machine according to the

present invention;

FIG. 4 is a plan view of the power transmitting means

of the driving part of the yarn-cleaving machine

according to the present invention;

FIG. 5 illustrates the ascended status of the lifting

bar and the cleaving cap of the yarn-cleaving machine

according to the present invention;

FIG. 6 illustrates the descended status of the lifting bar and the cleaving cap of the yarn-cleaving

machine according to the present invention;

FIG. 7 illustrates the guide part for measuring the

yarn carriage length in the yarn-cleaving machine

according to the present invention;

FIG. 8 is a sectional view of the yarn carriage length

measurement part of the yarn-cleaving machine according

to the present invention;

FIG. 9 is a conceptive view showing the actuation

sequence of the respective parts for measuring the yarn

carriage length in the yarn-cleaving machine according

to the present invention;

FIG. 10 is a perspective view of the raw yarn tension-

adjusting device of the yarn-cleaving machine according

to the present invention;

FIG. 11 is a frontal view of the raw yarn

tension-adjusting device of the yarn-cleaving machine

according to the present invention;

FIG. 12 is an exploded perspective view of the

tension adjusting part of the raw yarn tension-adjusting

device of the yarn-cleaving machine according to the present invention;

FIG. 13 is a sectional view showing the state of the

using of the raw yarn tension-adjusting device of the

yarn-cleaving machine according to the present

invention;

FIG. 14 is another sectional view showing the state

of the using of the raw yarn tension-adjusting device of

the yarn-cleaving machine according to the present

invention;

FIG. 15 illustrates a using state of the raw yarn

tension- adjusting device of the yarn-cleaving machine

according to the present invention, with a plurality of

the tension-adjusting devices formed therein;

FIG. 16 is a schematic view showing the installation

status of the raw yarn drum securing part of the raw yarn

tension- adjusting device of the yarn-cleaving machine

according to the present invention;

FIG. 17 is an exploded view of the raw yarn drum

securing part of the yarn-cleaving machine according to

the present invention;

FIG. 18 is a sectional view of the yarn-cleaving machine according to the present invention, the raw yarn

bobbin being fitted to the raw yarn drum securing part;

and

FIG. 19 is a sectional view of the yarn-cleaving

machine according to the present invention, the raw yarn

bobbin being secured to the raw yarn drum securing part.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Now the present invention will be described in detail

referring to the attached drawings.

FIG. 2 is a frontal sectional view of the driving

part of the yarn-cleaving machine according to the

present invention. FIG. 3 is a side view showing the

assembled state of the lifting bracket and the lifting

bar of the driving part of the yarn-cleaving machine

according to the present invention. FIG. 4 is a plan view

of the power-transmitting means of the driving part of

the yarn-cleaving machine according to the present

invention .

As shown in these drawings, the yarn-cleaving

machine according to the present invention includes: a lifting part for distributing a plurality of strands of

cleaved yarns, and for performing ascending/ descending

motions; a power part for vertically driving the lifting

part up and down; a lift adjustment part for adjusting

the vertical ascending/descending length; and an

automatic lift control part for automatically

controlling the actuations of the lifting mechanism part

and the lift adjustment part.

As shown in FIGs. 2, 3 and 4, the driving part has

a lifting bar 104, and the lifting bar 104 is installed

within the base body through a vertical guide cylinder

of a central top of the base body. The upper end of the

lifting bar 104 is attached to a bottom center of a round

conical cap 102, and the round conical cap 102 includes

a plurality of guide hooks 103 at certain constant

intervals. A vertical guide bar 105 is secured in front

of and separatedly from the lifting bar 104, with both

ends of the guide bar 105 being secured to upper and lower

inside portions of the base body 101. The lifting bar

104 is fastened into a fastening hole 106 with a bolt.

The guide bar 105 is inserted into a guide hole 107, and a pair of solenoids 109 and 109' are installed in

opposite directions to outsides of respective supporting

parts 108 and 108' . The supporting parts 108 and 108'

protrude to left and right sides of a front portion of

the guide bar 105, and a lifting bracket 111 is connected

through a string (guided by rollers 112 and 112' ) to a

balance weight 113. One end of each of picking bars 110

and 110' is hinge-coupled to the lifting bracket 111, and

another end of each of the picking bars 110 and 110' is

hinge-coupled to an actuation bar of each of the solenoids

109 and 109' .

A lifting power part is constituted as follows.

That is, a lifting pulley 116 is installed in an upper

portion of the base body 101 so as to make a lifting belt

115 disposed into between the supporting parts 108 and

108' of the lifting bracket 111 and one end of the picking

bars 110 and 110' . A decelerator 117 is installed in a

lower portion of the base body 101 so as to make an output

pulley 118 disposed directly below the lifting pulley 116.

An input pulley 119 of the decelerator 117 is connected

to a driving motor 206 through a generally known means. The lift adjustment part is constituted as follows.

That is, an adjusting bar 209 and a guide bar 210 are

vertically and separatedly installed between upper and

lower plates 207 and 208, one end of each of the plates

207 and 208 being secured to the guide bar 210, and another

end of each of the plates 207 and 208 protruding to one

side. The adjusting bar 209 is rotatably installed,

while both ends of the guide bar 210 are fixed. Upper

and lower movable beams 211 and 212 are rotatably and

mutually separatedly installed on the adjusting bar 209.

The automatic lift control part is constituted such

that a step motor 214 disposed at an end of the adjusting

bar 209 is meshed through first and second pinion gears

215 and 216. A sensing part 200 is formed at a side of

the lifting bracket 111, and the sensing part 200 is

constituted such that: contact terminals 217 and 217'

are formed on the upper and lower movable beams 211 and

212; a limit switch 218 is installed on the guide bar 210

to be contacted to another end of the upper movable beam

211; a gap-adjusting bar 129 is formed on the outer end

of the lower plate 208; and elements such as the step motor 214, the contact terminals 217 and 217', the limit

switches 218 and 218'and the solenoids 109 and 109' are

connected to a control part 220 so as to be controlled

by it .

The usual transmission means from the input pulley

119 of the decelerator 117 to the driving motor 206 in

the lifting power part includes: a first tension belt

119, lower and upper pulleys 201 and 203 of a passive

revolution shaft 202, a second tension belt 204, an

intermediate pulley 205, a third tension belt 204' and

a leading end pulleys 205' of a driving motor 206.

The adjusting bar 209 of the lift adjusting part has

two sets of threaded parts, the two sets of the threaded

parts being formed in the opposite directions from each

other. If the step motor 214 is driven to rotate the

adjusting bar 209 in the forward direction, then the upper

and lower movable beams 211 and 212 move toward the middle

portion of the adjustingbar 209 to approach to each other.

On the other hand, if the adjusting bar 209 is rotated

in the reverse direction, the upper and lower movable

beams 211 and 212 run away from each other. The rated voltage of the step motor 214 of the

automatic lift control part is dc 12V.

Now the present invention constituted as above will

be described as to its operations.

If the driving motor 206 is activated, then its

revolution torque is transmitted through the usual

transmission means such as the first tension belt 119,

the lower and upper pulleys 201 and 203 of the passive

revolution shaft 202, the second tension belt 204, the

intermediate pulley 205, the third tension belt 204' , and

the leading end pulley 205' of the driving motor 206 to

the input pulley 119 of the decelerator 117.

The revolution power of the driving motor 206 thus

transmitted is converted to the optimum revolution speed

by the decelerator 117 so as to be outputted to the output

pulley 118. Therefore, the left and right portions of

the lifting belt 115 between the output pulley 118 and

the lifting pulley 116 are running upward and downward

in the directions of the arrow marks A and B.

Thus, when the lifting belt 115 continuously runs,

if the power is supplied to the solenoid 109, and thus if its actuation bar is inserted into the body of the

solenoid 109, then the leading end of the picking bar 110

approaches to the inside of the supporting part 108' . At

the same time, a part of the lifting belt 115 is engaged,

and therefore, the lifting bracket 111 rises vertically

in the direction of the arrow mark B together with the

guide bar 105 along the lifting belt 115.

At the same time, the lifting bar 104 and the cleaving

cap 102 vertically rise, while the cleaving cap 102 is

uniformly winding the yarns to the cleaved yarn bobbins

13, as shown in FIG. 5.

If the upper portion of the lifting bracket 111 thus

rising contacts to the contact terminal 217 of the movable

beam 211, then the power to the solenoid 109 is

disconnected, while the power is supplied to the solenoid

109' . Therefore the actuation bar of the solenoid 109'

is inserted into the body of the solenoid 109' , while the

leading end of the picking bar 110' approaches to the

inside of the supporting part 108. Accordingly, a

portion of the lifting belt 115 is engaged, and therefore,

the lifting bracket 111 together with the guide bar 105 comes down in the direction of the arrow mark A along the

lifting belt 115.

At the same time, the lifting bar 104 and the cleaving

cap 102 vertically come down, while the cleaving cap 102

is uniformly winding the yarns to the cleaved yarn bobbins

13 as shown in FIG. 6.

If the upper portion of the lifting bracket 111 thus

descending contacts to the contact terminal 217' of the

movable beam 212, then the power to the solenoid 109' is

disconnected, while the power is supplied to the solenoid

109. Therefore the actuation bar of the solenoid 109 is

inserted into the body of the solenoid 109, while the

leading end of the picking bar 110 approaches to the inside

of the supporting part 108' . Accordingly, a portion of

the lifting belt 115 is engaged, and therefore, the

lifting bracket 111 together with the guide bar 105 rises

up in the direction of the arrow mark B along the lifting

belt 115.

Under this condition, owing to the balance weight

113 and owing to the lifting bar 104 and the cleaving cap

102, there is prevented the generation of any difference between the ascending and descending velocities of the

lifting bracket 111.

In this manner, the lifting bracket 111 performs

reciprocating vertical movements between the upper and

lower movable beams 211 and 212. Thus each time when the

lifting bracket 111 contacts the contact terminal 217 or

217', the step motor 214 rotates the adjusting bar 209

in the forward direction in a repeating manner.

As a result, the upper and lower movable beams 211

and 212 move up and down along the adjusting bar 209 owing

to the guide bar 210. Thus if the upper and lower movables

beams 211 and 212 approach toward the middle portion of

the adjusting bar 209, then the length of the vertical

movements of the lifting bracket 111 is gradually

shortened. Thus if the upper movable beam 211 contacts

to the limit switch 218, then the driving motor 206 is

stopped, resulting in that all the actuations are stopped

(this is the completion of the winding of the cleaved

yarns . )

Under this condition, if only the step motor 214 is

activated to rotate the adjusting bar 209 in the reverse direction, then the upper and lower movable beams 211 and

212 are moved away from each other until the limit switch

218' contacts to the separation adjustment bar 129. At

this point, the step motor 214 is stopped (this is the

initial ready status for winding the cleaved yarns to the

yarn bobbins )

Under this condition, the separation distance

between the upper and lower movable beams 211 and 212 is

adjusted to a length L over which the yarns are wound on

the cleaved yarn bobbins 13.

As described above, the operation is started from

the initial ready status to wind the cleaved yarns to the

cleaved yarn bobbins 13 by supplying the power to the

driving motor 206. Then the operation of the winding of

the yarns is terminated, and then the winding operation

is started again automatically. These automatic

operations are controlled by the control part 220 which

is connected to the driving motor 206, the contact

terminals 217 and 217', the limit switches 218 and 218',

the step motor 214 and the solenoids 109 and 109' .

The present invention includes a guide part G for measuring the yarn carriage length to automatically

control the operation, and this guide part G is

illustrated in FIGs. 7 to 9.

The yarn-cleaving machine according to the present

invention further includes:

a driving part 200 consisting of: a driving motor

206 as a revolution power source, a third tension belt

204' connected to the leading end pulley 205' of the

driving motor 206, a second tension belt 204, an upper

pulley 203, and a spindle belt 210 as shown in FIG. 4;

a yarn receiving part consisting of: a power

variable switch 311 for supplying the power to the driving

motor 206 of the driving part 200, a plurality of cleaved

yarn bobbin spindles 220 revolving by being connected to

spindle belts 210 of the driving part 200, and a plurality

of cleaved yarn bobbins 13;

a yarn supply part 400 consisting of: a raw yarn

bobbin 10 with a certain amount of a raw yarn wound thereon,

a raw yarn drum 7 for fitting the raw yarn bobbin 10, and

a revolution shaft pin 6 for the raw yarn drum 7;

a yarn carriage length measurement part 500 consisting of: a rotatable rolling device 322 including

a hub of a shaft hole 317, a plurality of through holes

318 and a plurality of rim parts 319 formed between the

hub and the outer circumference, a shaft pin 320, and a

round bearing 321; a revolution value sensor 323 disposed

on the axis of each of the through holes 318, with its

leading end approaching to the rear face of the rolling

device 322, and with its rear end fixed to a frame 303;

a display part 600 consisting of: a digital display

A (324) for displaying in numerals the revolution value

of the rolling device 322 as sensed by the revolution value

sensor 323, and a digital display B (325) for inputting

a reference revolution value of the rolling device 322;

and

a second control part 326 for receiving an

information from the revolution value sensor 323 to

display in numerals the received information to the

digital display A (324), and for comparing the received

current information of the revolution value sensor 323

with the reference revolution value of the digital

display B (325) so as to decrease the revolution value of the driving motor 206 upon finding a closeness of the

current information to the reference revolution value,

and so as to stop the driving motor 206 upon finding a

correspondence between the current information and the

reference revolution value, this being done by

controlling a power variable switch.

The driving part 200 and the control part for

controlling the driving part 200 are installed within the

base body 101. The yarn receiving part 300 is installed

in the upper portion of the base body 101, in connection

to the driving part 200.

The yarn supply part 400 is rotatably installed on

a plate 302 which perpendicularly extends from a side of

the base body 101.

The yarn carriage length measurement part 500 is

installed on a frame 103 which projects from a side of

the base body 101 to between the yarn receiving part 300

and the yarn supply part 400.

Now the present invention constituted as above will

be described as to its action and effects.

First, the raw yarn bobbin 10 with the raw yarn 127 wound thereon is fitted to the raw yarn drum revolution

pin 6, while a plurality of empty cleaved yarn bobbins

13 are fitted to the cleaved yarn bobbin spindles 220.

Then by using hands, each of the leading ends of the

cleaved yarn strands is wound on each of the cleaved yarn

bobbins 13.

Under this condition, the yarns are made contacted

to the outer circumference of the rolling device, with

the tensions of the yarns (raw yarn and cleaves yarns)

being made tight.

Thereafter, if the driving motor 206 is driven to

rotate the cleaved yarn bobbin spindles 220, then the

cleaved yarns are wound on the respective cleaved yarn

bobbins 13, and at the same time, the raw yarn bobbin 10

and the raw yarn drum 7 and the raw yarn drum revolution

pin 6 are revolved owing to the unwinding motions of the

yarn 11.

Accordingly, the yarn 327 is continuously unwound

away from the raw yarn bobbin 10 so as to be wound on the

respective cleaved yarn bobbins 13.

Thus according as the yarn 11 is carried from the raw yarn bobbin 10 to the cleaved yarn bobbins 13, the

rolling device 322 rotates in the direction of the

carriage of the yarn 11.

Under this condition, as the rolling device rotates,

the through holes 318 and the rim parts 319 alternately

pass over the leading end of the revolution sensor 323,

and therefore, the magnetic field of the leading end of

the revolution sensor 323 is momentarily and repeatedly

varied .

The current information as sensed by the revolution

sensor 323 is inputted into the second control part 326

on the real time basis, and therefore, the second control

part 326 displays in numerals the current information to

the digital display A (324) .

In this manner, the revolution value of the rolling

device 322 can be known by reading the numerals on the

digital display A (324) , and therefore, the total length

of the cleaved yarns as wound on the cleaved yarn bobbins

13 can be known.

That is, the number of the through holes 318 (or the

number of the rim parts 319) of the rolling device 322 is four, and therefore, if the figure as displayed on the

digital display A (324) is divided by 4, then the

revolution value of the rolling device 322 can be known.

Accordingly, the total length of the cleaved yarns 11 as

wound on the cleaved yarn bobbins 13 can be calculated

based on the following formula:

N X ( Φ X t ) (Z)

* N = C ÷D

where L is the total length of the cleaved yarn as wound

on the cleaved yarn bobbins; N is the number of the

revolutions of the rolling device; C is the figures

displayed on the digital displays A and B; D is the number

of the through holes of the rolling device; Φ is 3.14;

and Α is the diameter of the yarn-guiding and -carrying

pulley .

^Remarks: if the number D of the through holes of

the rolling device is larger, so much more accurately the

total length L can be calculated.

Therefore, in the actual operations, first the yarn

327 is connected to the cleaved yarn bobbins 13 with hands, and then, the total length L as will be displayed on the

digital display A (324) is calculated in advance based

on the above formula Z. Then the calculated figure is

inputted into the digital display B (325) .

Thereafter, if the driving motor 206 is activated

to continuously wind the cleaved yarns to the cleaved yarn

bobbins 13, then the numerals of the current information

are displayed on the digital display A (324)

continuously.

Then, according as the figures of the digital display

A (324) approach the figures of the digital display B (325) ,

the driving motor 206 is gradually slowed down.

Thereafter, if the figures of the digital display A (324)

exactly corresponds to the figures of the digital display

B (325) , then the second control part 326 controls the

power variable switch 311 to completely stop the driving

motor 206.

That is, the second control part 326 controls the

power variable switch 311 in such a manner that the switch

would gradually decrease the supply of power until it

completely stops the supply of power. In this manner, the revolutions of the driving motor

206 is gradually slowed down and then completely stopped,

and the revolutions of the yarn receiving part 300 and

the yarn supply part 400 are also slowed down and then

completely stopped.

Accordingly, the yarns 327 are wound on the cleaved

yarn bobbins 13 as much as the pre-set figures (reference

value) of the digital display B (325) .

Further, as shown in FIGs. 10 to 15, the raw yarn

tension adjustment device 700 is constituted such that:

a securing part 420 is installed on the raw yarn drum frame

2 of a side of the yarn-cleaving machine so as to be rotated

interlockingly to the cleaved yarn bobbins 13 by being

located at the rear of the raw yarn drum revolution pin

6;

the securing part 420 has an open side to be secured

to the outside of a securing bearing 421 of the raw yarn

drum revolution pin 6 by means of a securing bolt 422 so

as to form a securing brim 424 forming a pair of securing

brackets 423; and

a securing rod 426 having a securing slot 425 is secured to a rear portion of the securing brim 424 by

bolting, and a wheel pin 428 with an actuation piece 427

formed thereon is formed on another rear portion of it

together with a bearing 429, and a connection piece 431

with a plurality of securing holes 430 formed therein is

formed on a front portion of it so as to rotate the wheel

pin 428.

One end of each of the brake shoes 441 of the tension

adjustment part 440 is installed in the securing slot 425

of the securing rod 426 which is secured to the securing

part 420 as described above. The other ends of the brake

shoes 441 are installed on the actuation piece 427 of the

wheel pin 428 to be elastically installed to the securing

rod 426 by means of a connection spring 442. A lining

443 is attached on the outside of the brake shoe 441 so

that a gentle braking can be realized. A brake drum 444

which surrounds the outside of the brake shoes 441 is

secured to the rear end of the raw yarn drum revolution

pin 6. Thus if the pair of the brake shoes 441 are spread

out, they are subjected to frictions by being contacted

onto the inner circumference of the brake drum 444, thereby adjusting the tension.

For the action of the tension adjustment part 440,

a tension transmission rod 451 of the tension

transmission part 450 is connected to the upper portion

of the connection piece 431 of the securing part 420. The

upper portion of the tension transmission rod 451 is

connected through a connection bearing 452 to a tension

rod 408 which is disposed at a side of the yarn-cleaving

machine to move up and down in accordance with the tension

of the raw yarn.

One end of the tension adjustment spring 461 of the

tension setting part 460 is connected to the other end

of the tension transmission part 450. The other end of

the tension adjustment spring 461 of the tension setting

part 460 is connected to the actuation device 462, and

the actuation device 462 is provided with a guide hole

463 on its one side, while the actuation device 462 is

provided with a spiral hole 464 in its inside.

An actuation rod 466 is provided with actuation

threads on its outside, so as to move the actuation device

462 up and down and so as to adjust the tension by being coupled to the threaded hole 464 of the inside of the

actuation device 462, thereby making it possible to set

up the initial tension. For this purpose, an adjustment

handle 467 is formed on the top of the actuation rod 466,

so that the actuation device would move up and down in

accordance with the rotations of the actuation rod 466.

Further, the guide rod 468 which is inserted into

the guide hole 463 is secured to the horizontal frame of

the raw yarn drum frame 2, so that the actuation device

462 would move up and down through the guide hole 463

during the rotations of the actuation rod 466.

Now the present invention constituted as above will

be described as to its action and effects.

First, the raw yarn is engaged to an engaging rod

414 of the tension rod 408, and then is engaged to the

guide roller 9 of the raw yarn drum frame 2. Then the

raw yarn is engaged to both ends of the tension rod 408,

and is cleaved into a plurality of yarn strands to be

engaged to a plurality of guide rollers 9 and 9' . Then

the cleaved yarn strands are engaged to a plurality of

guide hooks 12 respectively to be wound on a plurality of cleaved yarn bobbins 13 respecti ely.

Under this condition, the guide cap 4 moves up and

down together with the plurality of the cleaved yarn

bobbins 13, so that the cleaved yarn would be uniformly

wound on the cleaved yarn bobbins 13 respectively.

Under this condition, when the guide cap 4 moves up

and down, or due to the revolution power of the driving

motor for rotating the plurality of the cleaved yarn

bobbins 13, the tension which transmitted to the raw yarn

11 is frequently varied.

Thus if the tension transmitted to the raw yarn 11

is varied, then the tension rod 408 is subjected to scissor

movements in accordance with the variations of the

tension, because the yarn passes along the both ends of

the tension rod 408.

Thus if the tension rod 408 performs the scissor

movements, then the tension transmission rod 451 of the

tension transmission part 450, which is interlocked to

the tension rod 408, is also subjected to scissor

movements. Then the transmission rod 453 of the end of

the tension transmission rod 451 moves up and down, so that the revolutions of the raw yarn drum revolution pin

6 are adjusted by the tension adjustment part 440.

That is, if the tension in intensified by an external

condition, one end of the tension rod 408 which lies on

the same straight line as the tension transmission rod

451 (which is connected to the tension adjustment spring

461 of the tension setting part 460) ascends, while the

tension transmission rod 451 interlockingly descends,

with the tension adjustment spring 461 being extended.

Thus, if the transmission rod 453 descends, then the

connection piece 431 which is connected to the lower end

of the transmission rod 453 descends. At the same time,

the wheel pin 428 on which the connection piece 431 is

secured is rotated to cause the actuation piece 427 of

the wheel pin 428 to be disposed in the horizontal posture.

As a result, the brake shoes 441 are separated from the

brake drum 444, and therefore, the revolution shaft pin

6 smoothly revolves, resulting in that the tension

imposed on the raw yarn 11 is released.

In this manner, if the value of the tension imposed

on the raw yarn 11 decreases to below a certain value, then the tension adjustment spring 461 of the tension

transmission rod 451 is pulled, while the tension rod 408

also performs the interlocked motions.

Thus if the transmission rod 451 is inclined by the

tension adjustment spring 461 by overcoming the tension,

then the transmission rod 453 rises, and at the same time,

an end of the connection piece 431 of the securing part

420 which is connected to the transmission rod 453 also

rises to cause the wheel pin 428 to be rotated, thereby

making the actuation piece 427 depart from the horizontal

position. Therefore, like a virtual line of FIG. 5, the

pair of the brake shoes 441 are spread out, resulting in

that the linings 443 of the brake shoes 441 are

press-contacted to brake the revolutions of the raw yarn

drum revolution pin 6. Consequently, the loosened

tension is tightened.

In this manner, the tension which is transmitted to

the raw yarn 11 by the tension transmission part 450 is

adjusted by the braking action of the tension adjustment

part 440, thereby adjusting the tension of the raw yarn

11. Meanwhile, the initial tension setup value is

determined through the tension setting part 460. That

is, the initial tension is adjusted in the following

manner. If the adjustment handle 467 of the actuation

rod 466 is rotated to lower the actuation device 462, then

the tension of the tension adjustment spring 461 is

intensified to pull one end of the tension transmission

rod 451, thereby intensifying the tension of the raw yarn.

On the other hand, if the adjustment handle 467 of the

actuation rod 466 is rotated in the opposite direction

to raise the actuation device 462, then the tension of

the tension adjustment spring 461 becomes weak, resulting

in that the force of pulling the tension adjustment spring

becomes weak. As a result, the force of pulling one end

of the tension transmission rod 451 becomes weak, thereby

making it possible to set the tension of the raw yarn at

a low level .

Thus if the pitches of the actuation spiral threads

465, which is formed on the actuation rod 466 of the

tension adjustment part 440, are made wide together with

the spiral threads of the insides of the actuation device 462, then a slight rotation of the adjustment handle 467

will achieve the purpose of setting the tension of the

yarn. Further, a plurality of the tension adjustment

parts and a plurality of the raw yarn bobbins can be

installed as shown in FIG. 15, thereby improving the

productivity .

Meanwhile, a raw yarn bobbin-securing device 800 of

the yarn-cleaving machine according to the present

invention is illustrated in FIGs. 16 to 19.

As shown in these drawings, the raw yarn bobbin

securing device 800 includes: a raw yarn drum revolution

pin 508 with a nut hole 506 formed in a leading end of

it to a certain depth, and with a fastening key 507

projecting from an outside circumference of it;

a raw yarn drum 512 for fitting a bobbin, with a

revolution pin 508 being axially installed therein, with

a left drum 509 and a right drum 511 each having an annular

recess, and with the right drum 511 having a key slot 507' ;

a plurality of bolt bars 516 for fastening the left and

right drums 509 and 511 to the intermediate drum 510 in

the axial direction; an adjustment bolt 517 for being fastened into the nut hole 506 to make it advance and

withdraw in the axial direction by turning it forward or

reverse; a tension spring 518 axially installed between

a head of the adjustment bolt 517 and the left drum 509,

for pressing the left drum 509 in the axial direction;

and a plurality of annular elastic members 519

respectively settled in the annular recesses 515 of the

left and right drums 509 and 511, for being expanded in

a radial direction upon close contact of the respective

drums .

The left drum 509 and the right drum 511 are

respectively provided with a shaft hole 514 for inserting

the revolution pin 508.

Annular recess parts 520' and 520 are formed in the

left face of the left drum 509 and the right face of the

right drum 511, so that the bolt bars 516 would not

protrude. Further, core parts 521 are formed on the left

and right drums 509 and 511, for guiding them.

The right drum 511 is provided with a bobbin settling

part 522 for settling the raw yarn bobbin 10.

The intermediate drum 510 is provided with an elongate hole 513 for receiving the core parts 521 of the

left and right drums 509 and 511.

The length of each of the core parts 521 is less than

half of the total length of the intermediate drum 510.

The left and right drums 509 and 511 are provided

with a plurality of through-holes 523 for fastening the

left and right drums 509 and 511 to the intermediate drum

510, while the intermediate drum 510 is provided with a

plurality of nut holes 524.

The through holes 523 have an inside diameter large

enough to smoothly receive the bodies of the bolt bars

516, while the nut holes of the intermediate drum 510 are

just suitable for receiving the end portions of the bolt

bars 516.

The through holes 523 and the nut holes 524 are formed

on the same circumference level. That is, at the same

radial distance from the revolution pin 508, they are

formed radially inwardly from the annular recesses 515

and 515'

The adjustment bolt 517 is provided with an annular

projection part 517'with the same diameter as the revolution shaft 508.

This will be described in more detail as to its

assembled state referring to FIGs. 16 and 17.

First, as shown in FIG. 16, the core parts 121 of

the left and right drums 109 and 111 are inserted into

the elongate hole 113 of the intermediate drum 110 from

the opposite ends of the intermediate drum 111. During

this assembling, the annular elastic members 119 are

installed into the annular recesses 115' of the left and

right drums 109 and 111.

Then the bolt bars 116 are inserted through the

through holes 123 of the left and right drums 109 and 111

into the nut holes 124 of the left and right faces of the

intermediate drum 110, thereby firmly coupling the left

and right drums 109 and 111 to the intermediate drum 110.

Under this condition, the fastened bolt bars 116 are

disposed radially inwardly from the annular elastic

members 119.

Further, the bolt bars 116 have a certain extra

length, so that the left and right drums 109 and 111 can

be slidedly separated from the intermediate drum 111 by a certain distance in the axial direction.

In this raw yarn drum 112, the assembling sequence

of the drums is the right drum 111 - the intermediate

drum 110 -^ the left drum 109. The leading end of the

revolution pin 108 is projected beyond the left face of

the left drum 109.

Further, a key 107 is inserted into the key slot 107'

of the right drum 111, and therefore, when the revolution

pin 108 revolves, the raw drum 112 revolves together with

the revolution pin 108 in the same direction.

Further, when fastening the leading end of the

adjustment bolt 117 into the nut hole 106, the tension

spring 118 exerts forces both onto the head of the

adjustment bolt 117 and the left drum 109 in the axial

direction.

Under this condition, the body of the adjustment bolt

117 is inserted from the left end of the tension spring

118, while the end of the revolution pin 108 is inserted

from the right end of the tension spring 118. Therefore,

the adjustment bolt 117 can be smoothly advanced when

fastening it . Now the present invention will be described in more

detail s .

First, as shown in FIG. 18, the raw yarn bobbin 102

is fitted to the raw yarn drum 112, and its end portion

is settled to the settling part of the right drum 111,

while the right drum 111 is contacted to a revolution shaft

housing 105 which is secured to the frame 104.

Thereafter, as shown in FIG. 19, if the adjustment

bolt 117 is rotated in the forward direction to advance

its head toward the left drum 109, then the left and right

drums 109 and 111 are closely contacted to the

intermediate drum 110, and therefore, the annular

recesses 115' of the left and right drums 109 and 111 and

the annular recess 115 of the intermediate drum 110 are

formed into V-shaped annular recesses. At the same time,

the annular elastic members 119 are expanded outward in

the radial direction, resulting in that the annular

elastic members 119 press onto the inner circumference

of the raw yarn bobbin 102.

Accordingly, the raw yarn bobbin 102 cannot be

slipped around the raw yarn drum 112 owing to the pressing of the annular elastic members 119, and therefore, the

raw yarn bobbin 102 cannot make any idle revolutions.

That is, either during low speed revolutions or high

speed revolutions, the elements such as the revolution

pin 108, the raw yarn drum 112 and the raw yarn bobbin

102 do not make idle revolutions.

Under this condition, the pressing forces of the

annular elastic members 119 should be properly adjusted

by taking into account the residual amount of the raw yarn

on the raw yarn bobbin 102.

Thereafter, if the raw yarn bobbin is to be detached

from the raw yarn drum 112, the adjustment bolt 117 is

rotated in the reverse direction to make the adjustment

bolt 117 withdraw from the left face of the left drum 109.

Thus the force of the tension spring 118 is weakened, and

therefore, the annular elastic members 119 are contracted,

while the left and right drums 109 and 111 are separated

from the intermediate drum 110. As a result, the pressing

force acting on the inner circumference of the raw yarn

bobbin 102 is dissipated, and therefore, the raw yarn

bobbin 102 can be easily taken out from the raw yarn bobbin drum 112

According to the present invention as described

above, the inner circumference of the raw yarn bobbin is

pressed with a plurality of annular elastic members, and

therefore, either at low speed revolutions or high speed

revolutions, the raw yarn bobbin can be prevented from idle

revolutions. Further, the lifting part moves up and down

without any acceleration and deceleration, and therefore,

the cleaved yarns are uniformly wound on the cleaved yarn

bobbins .

Further, the cleaved yarns are wound on the bobbins

conically at both ends of the bobbins, and therefore, the

wound contour is not deformed when carrying or filing them.

The total length of the cleaved yarns to be wound

is set in advance, and the winding of the yarns is carried

out as much as the pre-set amount. Accordingly, the yarn

carriage deviation tolerance is minimized, and the

manpower cost can be curtailed. Further, the tension of

the raw yarn during its unwinding can be automatically

adjusted so as to control the incidental variation of the tension of the raw yarn during the operation, and therefore,

the tension of the raw yarn can be optimally maintained.

In the above, the present invention was described

based on the specific preferred embodiments and the

attached drawings, but it should be apparent to those

ordinarily skilled in the art that various changes and

modifications can be added without departing from the

spirit and scope of the present invention, which will be

defined in the appended claims

Claims

WHAT IS CLAIMED IS:

1. A yarn-cleaving machine comprising:

a base body with a raw yarn frame, a rectangular piped

frame and power devices installed therein;

a yarn cleaving part installed above the base body,

and including a yarn cleaving guide cap and a plurality

of cleaved yarn bobbins;

a driving part installed within the base body, for

lifting or rotating the yarn-cleaving part;

a raw yarn drum-securing part installed under a raw

yarn drum frame, for securing the raw yarn drum;

a raw yarn tension-adjusting device installed above

the raw yarn drum frame, for adjusting a tension of the

raw yarn; and

a guide part consisting of a plurality of guide

rollers and formed above the tension-adjusting device,

characterized in that:

the driving part comprises a lifting bar, the lifting

bar being installed within the base body through a

vertical guide cylinder of a central top of the base body, an upper end of the lifting bar being attached to a bottom

center of a round conical cap, the round conical cap

including a plurality of guide hooks at certain constant

intervals; and a vertical guide bar is secured in front

of and separatedly from the lifting bar, with both ends

of the guide bar being secured to upper and lower inside

portions of the base body, a pair of solenoids being

installed on a pair of supporting parts in mutually

opposite directions, one end of each of a pair of picking

bars being hinge-connected to each of actuation bars of

the solenoids, other ends of the picking bars being

contacted to inner portions of the supporting parts, and

a lifting bracket supporting the pair of the picking bars;

a lifting power part comprises a lifting pulley, the

lifting pulley being installed in an upper portion of the

base body, a belt engaged to the lifting pulley passing

through between ends of the picking bars and the

supporting parts of the lifting bracket, an output pulley

of a decelerator being installed directly below the

lifting pulley and in a lower portion of the base body,

and an input pulley of the decelerator being connected through a first tension belt, lower and upper pulleys of

a passive revolution shaft, a second tension belt, an

intermediate pulley, a third tension belt and a driving

motor ;

a lift adjustment part comprises an adjustment bar

and a guide bar disposed between upper and lower plates,

the adjustment bar being rotatably installed, both ends

of the guide bar being fixed, upper and lower movable beams

being installed on the adjustment bar with a certain gap

between the two beams, the lifting bracket being disposed

between the upper and lower movable beams, one ends of

the movable beams interfering to the lift bracket, and

other ends of the movable beams being connected to the

guide bar;

a sensing part comprises a step motor disposed on

a bottom of the adjustment bar, the step motor being meshed

to first and second pinion gears, the upper and lower

movable beams being provided with contact terminals

respectively, a limit switch being installed on the guide

bar so as to be contacted to other ends of the movable

beams, and a gap adjustment bar being installed on an end of the lower plate; and

a control part for driving the step motor by certain

angular degrees in response to sensed signals of the

contact terminals, for supplying a power to the solenoids,

and for supplying or withholding the power to and from

the driving motor.

2. The yarn-cleaving machine as claimed in claim 1,

wherein the adjusting bar is provided with two sets of

thread parts on upper and lower portions thereof in

mutually opposite directions, and if the adjusting bar

is rotated by a step motor in a forward direction, the

two movable beams approach to each other, and if the

adjusting bar is rotated in a reverse direction, the two

movable beams move away from each other.

3. The yarn-cleaving machine as claimed in claim 1,

further comprising:

a yarn carriage length measurement part consisting

of: a rotatable rolling device including a hub of a shaft

hole, a plurality of through holes and a plurality of rim parts formed between the hub and the outer circumference,

a shaft pin, and a round bearing; and a revolution value

sensor disposed on the axis of each of the through holes,

with its leading end approaching to the rear face of the

rolling device, and with its rear end fixed to a frame;

a display part consisting of: a digital display A

for displaying in numerals the revolution value of the

rolling device as sensed by the revolution value sensor,

and a digital display B for inputting a reference

revolution value of the rolling device; and

a second control part for receiving an information

from the revolution value sensor to display in numerals

the received information to the digital display A, and

for comparing the received current information of the

revolution value sensor with the reference revolution

value of the digital display B so as to decrease the

revolution value of the driving motor upon finding a

closeness of the current information to the reference

revolution value, and so as to stop the driving motor upon

finding a correspondence between the current information

and the reference revolution value, this being done by controlling a power variable switch

4. The yarn-cleaving machine as claimed in claim 1,

wherein the tension-adjusting device comprises:

a securing part installed on a raw yarn drum frame

of a side of the yarn cleaving machine to be rotated

interlockingly to the cleaved yarn bobbins, and secured

to a fixed bearing by means of a bolt, and having a securing

rod with a securing slot formed on a securing edge, and

having a rotatable wheel pin on another side, the wheel

pin being rotated by a connection piece, and the connection

piece being secured to the securing part;

a tension adjustment part, with its one end being

installed in the securing slot of the securing rod of the

securing part, with its another end being installed on an

actuation piece of the wheel pin, with a pair of brake shoes

being installed on a connection spring of the securing rod,

with a lining being formed on each of the brake shoes to

surround its outside, and with a brake drum being secured

to a rear end of the raw yarn drum revolution pin so as

to be interlockingly revolved together with the raw yarn drum revolution pin;

a tension transmission part, with a tension

transmitting rod being connected to the connection pin of

the securing part to decelerate the tension adjustment

part, with an upper end of the tension transmitting rod

being connected to a tension rod, and the tension rod

moving up and down in accordance with the tension of the

raw yarn, so as to transmit the tension of the raw yarn;

and

a tension setting part, with one end of a tension

adjustment spring being connected to another end of the

tension transmission part, another end of the tension

adjustment spring being connected to an actuation device,

the actuation device having a guide hole on one side and

a spiral slot in its inside, with an adjustment handle

being formed to cause the actuation device to move up and

down, with an actuation rod having a spiral lines on its

outside, and with a guide rod being inserted into the guide

hole to make the actuation device move up and down without

being rotated.

5. The yarn-cleaving machine as claimed in claim 1,

wherein the raw yarn drum-securing part comprises:

the raw yarn drum revolution pin, with a nut hole

being formed in its leading end in an axial direction, and

with a fastening key projecting from its outside;

a raw yarn drum axially installed to the raw yarn

drum revolution pin, and including a left drum and an

intermediate drum, and including a right drum, the two

drums (left and right drums) having annular recesses

respectively, the right drum having a key slot in the axial

direction ;

a plurality of bolt bars for fastening the left and

right drums to the intermediate drum;

an adjustment bolt for being fastened into the nut

hole to perform reciprocation movements during

forward/reverse revolutions over a certain distance;

a tension spring installed between a bottom of a head

of the adjustment bolt and the left drum to press the left

drum in the axial direction; and

annular elastic members axially installed within

annular recesses of the left and right drums so as to be expanded in the radial direction upon a close contact of

the drum.

6. The yarn-cleaving machine as claimed in claim 5,

wherein each of the left and right drums has an axial hole

for receiving the revolution pin; core parts are formed

on each of the left and right drums; an elongate hole is

formed through an axis of the intermediate drum to receive

the core parts; recessed parts are formed in a left face

of the left drum and in a right face of the right drum so

as to prevent the bolt bars from protruding; and an annular

settling part is formed on an outside circumference of the

right drum, for the raw yarn bobbin