喷气织机英文翻译

西安工程大学毕业设计（译文）

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Air jet loom

喷气织机

机电工程学院

2009

级机械工程及自动化

03

班

王帅

4

西安工程大学毕业设计（外文）

Form KARIE - EP Patent 1,835,057, 2007 -

Air jet loom

Abstract:

An

air

jet

loom

includes

a

weft

insertion

nozzle

for

inserting

a

weft

thread

through a shed by means of an airflow; a first supply channel for supplying the weft

insertion

nozzle

with

first

compressed

air

for

weft

insertion;

and

a

second

supply

channel for supplying the weft insertion nozzle with second compressed air having a

pressure different from that of the first compressed air. The second supply channel has

an on-off valve which is opened substantially when the weft thread passed through the

weft insertion nozzle is cut by a thread cutter. Apart from the above opening operation

of the on-off valve, an opening operation is performed on the on-off valve such as to

thread the weft thread through the weft insertion nozzle.

Claims:

1. An air jet loom

that discharges compressed air from a weft insertion nozzle to

insert

a

weft

thread

through

a

shed

formed

by

warp

threads,

the

air

jet

loom

comprising: the weft insertion nozzle for inserting the weft thread through the shed by

means

of

an

airflow;

a

first

supply

channel

for

supplying

the

weft

insertion

nozzle

weft insertion nozzle with second compressed air having a pressure different from that

of the first compressed air, the second supply channel having an on-off valve which is

opened substantially when the weft thread passed through the weft insertion nozzle is

cut by a thread cutter; and a controller that opens the on- off valve so as to thread the

weft thread through the weft insertion nozzle, wherein the opening operation of the

on-off

valve

performed

by

the

controller

for

threading

the

weft

thread

through

the

weft insertion nozzle is performed independent of the opening operation of the on-off

valve performed substantially when the weft thread is cut by the thread cutter.

2.

The

air

jet

loom

according

to

Claim

1,

wherein

the

controller

includes

a

manual

operating

device

for

opening

the

on-off

valve

,

and

wherein

the

opening

operation of the on- off valve performed by the controller for threading the weft thread

through

the

weft

insertion

nozzle

is

performed

when

the

controller

is

receiving

a

I

西安工程大学毕业设计（外文）

control signal rom the manual operating device .

3. The air jet loom according to

Claim

2, wherein

the manual

operating device

includes

an

operating

switch

for

outputting

the

control

signal

,

a

setting

unit

for

setting an open time period

of the on-off valve,

and an output unit that

outputs the

control signal to the on-off valve when the operating switch is operated, the control

signal being output for the open time period set by the setting unit .

4. The air jet loom according to

Claim

3, wherein

the manual

operating device

includes an operating switch for outputting the control signal and an output unit that

continuously outputs the control signal to the on-off valve during a period in which

the operating switch is switched on for threading the weft thread

through the weft

insertion nozzle .

Description:

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present

invention

relates

to

an

air jet loom that

discharges

compressed air

from a weft insertion nozzle to insert a weft thread through a shed formed by warp

threads.

2. Description of the Related Art

In an air jet loom, as disclosed in, for example,

Japanese Patent No. 2894465, a weft insertion nozzle is used for inserting a weft

thread through a shed formed by warp threads. Specifically, the weft insertion nozzle

discharges compressed air that carries the weft thread into the shed for weft insertion.

Generally, when an inserted weft thread is cut by a thread cutter, the weft thread

kinks. In order to prevent a kinked weft thread from falling out of the weft insertion

nozzle, compressed air having a pressure lower than that of the compressed air used

for weft insertion is supplied to the weft insertion nozzle substantially when the weft

thread is cut by the thread cutter. In other words, a cutting blow is supplied to the weft

insertion nozzle.

Furthermore, if a weft thread does fall out of the weft insertion nozzle, the loom

needs to

be stopped in

order to

re-thread the weft

thread through the weft

insertion

II

西安工程大学毕业设计（外文）

nozzle. In order to

facilitate this re-threading process,

compressed air having an

air

pressure

that

is

lower

than

that

of

the

compressed

air

used

for

weft

insertion

is

supplied to the weft insertion nozzle only at the time of a threading process.

Consequently, since the weft insertion nozzle receives the compressed air with a

pressure lower than that of the compressed air used for weft insertion at the time of a

threading

process,

the

weft

thread

can

be

carried

by

this

low- pressure

air

without

untwining. Accordingly, the weft thread can be threaded readily and quickly through

the weft insertion nozzle.

However, in the conventional air jet loom, the compressed air used for threading

the weft thread through the weft insertion nozzle is guided the weft insertion nozzle

through

a

designated

duct.

Since

this

led

to

a

complicated

duct

installation,

a

simplified duct arrangement has been in demand.

SUMMARY OF THE INVENTION

Accordingly, it is

an object

of the present

invention

to

provide an

air jet loom

that allows for an easy threading process for threading a weft thread through a weft

insertion nozzle without requiring a complicated duct arrangement.

The

present

invention

focuses

on

the

point

that

the

compressed

air

used

for

a

cutting blow, which is supplied to the weft insertion nozzle substantially when a weft

thread is cut by the thread cutter, is not necessary at the time of a threading process,

that

is,

when

the

loom

is

not

performing

a

weaving

operation.

Therefore,

the

basic

concept

of the present

invention is

that the duct for transferring the

compressed air

used for a cutting blow serves also as a duct for transferring compressed air used for

the threading process.

Specifically, an

air jet loom

according to

the present

invention

includes a weft

insertion nozzle for inserting a weft thread through a shed by means of an airflow; a

first supply channel for supplying the weft insertion nozzle with first compressed air

for

weft

insertion;

a

second

supply

channel

for

supplying

the

weft

insertion

nozzle

with

second

compressed

air

having

a

pressure

different

from

that

of

the

first

compressed

air,

the

second

supply

channel

having

an

on-off

valve

which

is

opened

substantially when the weft thread passed through the weft insertion nozzle is cut by a

thread

cutter;

and

a

controller

that

opens

the

on-off

valve

so

as

to

thread

the

weft

thread through the weft insertion nozzle. This opening operation of the on-off valve

III