JPH08177741A - Compressed air supply device - Google Patents

Abstract

PURPOSE: To prevent an adverse influence by sticking of a foreign matter in a compressed air supply device. CONSTITUTION: A compressed air supply device 7 is provided with a fixed delivery type compressor 11, an aftercooler 14 interposed in a supply passage 13 and a refrigerating type drier 15 interposed in the supply passage 13. The aftercooler 14 is composed of a heat exchanger 14-1 and a fan device 14-2. The refrigerating type drier 15 is composed of a heat exchanger 15-1 and a fan device 15-2. A pair of blow nozzles 16 and 17 are arranged on the side of fan device 14-2, and a pair of blow nozzles 18 and 19 are arranged on the side of the fan device 15-2. The blow nozzles 16 to 19 are connected to the supply passage 13 downstream of the refrigerating type drier 15 through a solenoid opening-closing valve 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressed air supply device.

[0002]

A device for supplying compressed air to a compressed air consuming device such as an air jet loom is disclosed in Japanese Patent Laid-Open No. 3-1049.
No. 62 publication. In this device, pressure information is output to the controller from each pressure regulator of multiple air jet rooms, and pressure information is output to the controller from a pressure sensor that detects the pressure in the tank on the compressed air supply path. . The controller controls the supply pressure of the compressed air based on the pressure information obtained from the plurality of pressure regulators and the pressure information obtained from the pressure sensor.

Control of the supply pressure is important, but dehumidification of compressed air may be important depending on the compressed air consuming device. Especially in the air jet loom, dehumidification of the compressed air is required for good weft insertion.

[0004]

Generally, when dehumidifying compressed air, a dehumidifying system utilizing a heat exchanger is adopted. Outside air is blown to the heat exchanger through which compressed air is blown by the blowing action of the fan. Outside air is introduced into the compressed air supply device through a filter consisting of a mesh,
Since fine foreign matter enters the inside without being filtered, the foreign matter adheres to the heat exchanger by the spraying. When the compressed air consuming device is an air jet loom, cotton wool adheres to the heat exchanger. The adherence of such foreign matter reduces the heat exchange efficiency in the heat exchanger and reduces the dehumidifying function.

An object of the present invention is to prevent the adverse effect of foreign matter adhesion in a compressed air supply device.

[0006]

To this end, according to the invention of claim 1, there is provided a compressed air supply apparatus incorporating a blowing means for blowing a part of the compressed air produced by the compressed air supply apparatus to the compressed air supply apparatus. Configured.

According to the second aspect of the present invention, the spraying target of the spraying means is the heat exchanger in the compressed air supply device. Claim 3
In the invention, the use condition transmitting means for transmitting the compressed air use condition in the compressed air consuming device, and the spray control device for controlling the operation of the spraying device based on the use condition information transmitted by the use condition transmitting means are provided. The provided compressed air supply device was configured.

In the invention of claim 4, the air jet loom is a compressed air consuming device. According to the invention of claim 5, the air jet loom provided with the weft processing device for coping with the weft insertion error using the compressed air is used as the compressed air consuming device, and the spraying means is operated at least at a part of the operation of the weft processing device. The spraying control means has a control function.

[0009]

According to the invention of claim 1, a part of the compressed air produced by the compressor is blown from the blowing means to the compressed air supply device. Foreign matter adhering to the compressed air supply device is removed by the spraying action of the spraying means.

According to the second aspect of the present invention, the foreign matter adhering to the heat exchanger in the compressed air supply device is removed by the spraying action of the spraying means, and the decrease in heat exchange efficiency in the heat exchanger is avoided.

According to the third aspect of the invention, when the usage status transmitting means in the compressed air consuming device transmits the stoppage of the operation of the compressed air consuming device, the spray control means operates the spraying means.
Therefore, when the consumption of compressed air in the compressed air consumption device is reduced, the compressed air is used for purposes other than the consumption of compressed air in the compressed air consumption device, and the original purpose of compressed air consumption in the compressed air consumption device is used. Does not cause any problems.

According to the fourth aspect of the present invention, a part of the compressed air supplied to the air jet loom is used for removing foreign matters in the compressed air supply device. According to the fifth aspect of the invention, when a weft insertion error occurs in the air jet loom, the weft processing device removes the weft insertion error from the front of the woven fabric. During the weft processing, part of the compressed air is used to remove foreign matter in the compressed air supply device.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment embodying the present invention will now be described with reference to FIG.
~ It demonstrates based on FIG. 1 is an air jet loom which is a compressed air consuming device, and the loom drive motor 2 is controlled by the loom control computer C ₀ . The loom control computer C ₀ controls the operation of the loom drive motor 2 and the excitation / demagnetization control of the electromagnetic opening / closing valve 4 based on the ON operation of the start switch 3. As shown in FIG. 3, in the air jet loom 1, the weft Y is ejected into the warp opening by the weft insertion main nozzle 5. The weft Y injected into the warp opening flies in the warp opening by relay injection of a plurality of weft insertion auxiliary nozzles (not shown). In FIG. 1, an electromagnetic on-off valve for switching supply and stop of compressed air to the weft insertion main nozzle 5 and an electromagnetic on-off valve for switching supply and stop of compressed air to the weft insertion auxiliary nozzle are electromagnetic on-off valves 4. Are collectively represented by. Electromagnetic on-off valve 4 on main nozzle 5 for weft insertion
And the pressure regulator 6 are connected in parallel.

Reference numeral 7 is a compressed air supply device. One compressed air supply device 7 is used for one air jet room 1. The compressed air supply device 7 includes a discharge flow rate determination circuit 8
An inverter 9, a pulse motor 10, a fixed displacement compressor 11, an open / close differential pressure switch 12, an aftercooler 14 interposed on a supply path 13, and a supply path 13. And a freeze-drying device 15. The aftercooler 14 includes a heat exchanger 14-1 and a fan device 14-2. The freezing-type drying device 15 is the heat exchanger 15
-1 and a fan unit 15-2. The compressed air discharged from the compressor 11 is the heat exchanger 14-1 of the aftercooler 14.
In, the fan device 14-2 is cooled by the blowing action. The compressed air cooled in the aftercooler 14 is dehumidified by the cooling action in the heat exchanger 15-1 of the refrigerating dryer 15. Dehumidification of the compressed air prevents dew generation when air is jetted from the weft-insertion main nozzle 5 and the weft-insertion auxiliary nozzles, and the adverse effect of the dew-generation on the weft insertion of the weft Y is avoided.

A pair of blow nozzles 16 and 17 are installed beside the fan unit 14-2, and the fan unit 15-2 is provided.
A pair of blow nozzles 18 and 19 are installed on the side of. The blow nozzles 16 to 19 are connected to a supply path 13 downstream of the refrigerating dryer 15 via an electromagnetic opening / closing valve 20. The air blown from the blow nozzles 16 and 17 is blown to the heat exchanger 14-1 and blown nozzles 18 and 19 are blown.
The blast air from is blown to the heat exchanger 15-1. The blowing directions of the blow nozzles 16 and 17 are substantially the same as the blowing direction of the fan unit 14-2, and the blowing directions of the blow nozzles 18 and 19 are substantially the same as the blowing direction of the fan unit 15-2. Therefore, the blown air from the blow nozzles 16 to 19 blows off and removes the foreign matter (mainly cotton dust) attached to the heat exchangers 14-1 and 15-1. The blow nozzles 16 to 19 and the electromagnetic opening / closing valve 20 form a blowing unit.

FIG. 6A shows the outer shape of the compressed air supply device 7. A window frame 21 is attached to one side surface of the compressed air supply device 7, and a net 22 is attached to the window frame 21 by a holding frame 23,
It is pressed and fixed by 24. The net 22 is formed of a plain woven wire net, and the net roughness is 60 to 120 mesh. A motor 25 shown in FIG. 7 is fixed to the back side of the window frame 21. The drive shaft 25-1 of the motor 25 projects through the center of the window frame 21 and the pressing frame 24, and a brush 26 is attached to the projecting end of the drive shaft 25-1. The brush 26 is rotated by the operation of the motor 25, and the bristles of the brush 26 scrape the net 22. The fan devices 14-2 and 15-2 blow the atmosphere toward the heat exchangers 14-1 and 15-1, and this blowing action introduces outside air from outside the compressed air supply device 7 through the net 22. As the outside air is introduced, foreign matter adheres to the net 22. The motor 25 is operated intermittently to rotate the brush 2.
6 removes foreign matter adhering to the net 22. That is, FIG.
(A) and FIG. 7 show a mechanism for preventing foreign matter from entering the compressed air supply device 7.

As shown in FIG. 6B, a scraper 27 is provided on the front side of the net 22 in the radial direction of the drive shaft 25-1, and a suction prevention plate 28 is provided on the back side of the net 22 corresponding to the scraper 27. Alternatively, a nozzle 29 for blowing compressed air may be provided on the surface of the scraper 27. The brush 26 rubs the scraper 27, and foreign substances adhering to the brush 26 are scraped off during the rubbing. The suction preventive plate 28 is for preventing foreign matters attached to the scraper 27 from being sucked into the compressed air supply device 7 through the net 22. The nozzle 29 blows off the foreign matter attached to the scraper 27 to the outside of the outer periphery of the net 22. The nozzle 29 may be connected to the electromagnetic opening / closing valve 20.

In the air jet loom 1 of this embodiment, FIG.
The weft processing device 30 shown in FIG. The weft processing device 30 will be described with reference to FIG. A fixed blade 31 is fixed to the upper end of the weft inserting main nozzle 5 so as to slightly protrude from the front end of the weft inserting main nozzle 5. A blow-up nozzle 32 is installed directly below the weft-insertion main nozzle 5, and the jet direction thereof is the weft-insertion main nozzle 5.
It is set so as to intersect with the injection path of. A weft introduction duct 33 is installed immediately above the weft insertion main nozzle 5 so as to face the blowing nozzle 32. A weft detector 34, which also functions as an air guide, is installed behind the exit of the weft introduction duct 33. A discharge pipe 35 and a suction nozzle 35-1 are installed behind the weft detector 34. The weft insertion main nozzle 5 is connected to the supply path 13 via an electromagnetic opening / closing valve 4. The blowing nozzle 32 is connected to the supply path 13 via an electromagnetic opening / closing valve 36. The suction nozzle 35-1 is connected to the supply path 13 via an electromagnetic opening / closing valve 37.

The weft insertion main nozzle 5, the blowing nozzle 32, the weft introduction duct 33, the weft detector 34, and the suction nozzle 35-1 are all mounted on a sley (not shown), and as the sley swings. And swing together. A take-up motor 38 is installed behind the swing region of each of these members. The drive roller 38-1 of the take-up motor 38 faces the driven roller 39-1 attached to the drive rod of the air cylinder 39. The air cylinder 39 is connected to the supply path 13 via an electromagnetic three-way valve 40 having an exhaust port.

Electromagnetic on-off valves 36 and 37, take-up motor 3
8 and electromagnetic three-way valve 40 are weft processing control computer C ₁
Under the control of. The weft processing control computer C ₁ is based on the operation command signal from the loom control computer C ₀ and the detection signal from the weft detector 34, and the electromagnetic on-off valves 36, 3
7 and electromagnetic three-way valve 40 demagnetization and take-up motor 38
Control the operation of.

When a weft insertion error occurs such that the weft Y ejected from the weft insertion main nozzle 5 does not reach a predetermined position, a weft detection device (not shown) for detecting whether or not the weft has arrived detects a weft insertion error. The signal is output to the loom control computer C ₀ . The loom control computer C ₀ outputs a weaving stop signal based on the input of the weft insertion error detection signal. The loom drive motor 2 stops its operation when the weaving stop signal is output. After this weaving stop command, the air jet loom 1 beats the weft thread which has been miss-inserted, rotates about once, and then stops, and the reed (not shown) on the sley stops at the position immediately before the beating. Next, the reed is retracted to the last retracted position, and the region between the weft introduction duct 33 and the weft detector 34 is arranged between the drive roller 38-1 and the driven roller 39-1.
The connection between the weft thread that has made a weft insertion error and the subsequent weft thread is maintained without being cut. In this connected state, the succeeding weft is jetted by the jetting of the low pressure P ₃ from the weft inserting main nozzle 5 (the pressure regulated by the pressure regulator 6), and the jetting nozzle 32 and the suction nozzle 35-1 also jet. . The succeeding weft yarn ejected from the weft-insertion main nozzle 5 for a predetermined length is jetted by the blow-up nozzle 32 to guide the weft yarn introduction duct 33.
Is blown into and is sucked into the discharge pipe 35. When the weft detector 34 detects the presence of a succeeding weft, the solenoid opening / closing valve 3
6 is demagnetized and the electromagnetic three-way valve 40 is excited. The air cylinder 39 is actuated by the excitation of the electromagnetic three-way valve 40, the driven roller 39-1 is joined to the driving roller 38-1, and the succeeding weft yarn is gripped between the rollers 38-1 and 39-1. In this gripped state, the take-up motor 38 operates to take up the succeeding weft, and the take-up tension causes the succeeding weft to come into contact with the fixed blade 31 to be cut and separated from the main weft inserting nozzle 5. Then, the weft that has made a weft insertion error is removed from the warp shed as the succeeding weft is taken up. When all the wefts that have been weft-inserted have passed the weft detector 34, the weft detector 34 outputs a weft non-detection signal to the weft processing control computer C ₁ . The weft processing control computer C ₁ demagnetizes the electromagnetic on-off valve 37 and the electromagnetic three-way valve 40 in response to the input of the weft non-detection signal, and stops the operation of the take-up motor 38.

Thus, the weft processing by the weft processing device 30 is completed. After the completion of the weft processing, the loom control computer C ₀ commands the resumption of weaving. The pressure switch 12 detects the pressure on the compressed air supply path 13 from the compressor 11 to the air jet room 1. When the pressure on the supply path 13 exceeds the first reference pressure P ₁ , the pressure switch 12 is turned off.
To do. This OFF state is maintained until the pressure on the supply path 13 is reduced to the second reference pressure P ₂ (<P ₁ ). When the pressure on the supply path 13 falls below the second reference pressure P ₂ , the pressure switch 12 is turned on. This ON state is the supply path 1
It is maintained until the pressure above 3 rises to the first reference pressure P ₁ .

FIG. 2 shows a control circuit of the compressed air supply device 7. The inverter 9 outputs a pulse signal obtained by converting the output frequency of the three-phase AC power supply 41 to the pulse motor 10. The pulse motor 10 rotates at a rotation speed proportional to the conversion frequency, and the fixed displacement compressor 11 discharges compressed air having a volume according to the rotation speed of the pulse motor 10. That is, the discharge flow rate per unit time in the supply path 13 increases as the rotation speed of the pulse motor 10 increases.

The terminal 9-1 of the inverter 9 has a common end.
Terminals, terminals 9-2, 9-3, 9-4 are terminals for selecting conversion frequency
is there. Curve E in FIG.₁Represents the rotation speed of the compressor 11.
Curve E ₂Is the electrical connection and electrical interruption between terminals 9-1 and 9-2.
It is a curve showing switching of disconnection. Normally closed contact CL in FIG.
₁₁And normally open contact OP_{twenty one}Close together, terminals 9-1, 9-2
The spaces are electrically connected. Curve E₃Is between terminals 9-1 and 9-3
It is a curve showing switching of electrical connection and electrical interruption. Figure
Normally open contact OP in 2₁₂, Normally closed contact CL_{twenty two}And normally closed
Point CL₃When both are closed, the contacts 9-1 and 9-3 are electrically connected.
Connecting. Curve E _FourIs the electrical connection between terminals 9-1 and 9-4
3 is a curve showing switching between electrical interruption and electrical interruption. 2 in FIG.
Open contact OP₁₃, OP_{twenty three}When one is closed, the contacts 9-1, 9
-4 is electrically connected.

The inverter 9 does not output a pulse signal when the contacts 9-1 and 9-2, the contacts 9-1 and 9-3, and the contacts 9-1 and 9-4 are all electrically disconnected. Contact points 9-1, 9
-2 is electrically cut off, between contacts 9-1 and 9-3 and contact 9-
When 1 and 9-4 are electrically connected to each other, the inverter 9 outputs a pulse signal having a conversion frequency that sets the rotation speed of the compressor 11 to N ₃ . Between contacts 9-1 and 9-2 and contact 9-1,
When 9-4 is electrically connected and contacts 9-1 and 9-3 are electrically disconnected, the inverter 9 sets the rotation speed of the compressor 11 to the second rotation speed N ₂ (> N ₃ ). Output a pulse signal of the converted frequency. Between contacts 9-1 and 9-2 and setting 9
-1 and 9-3 are electrically disconnected, and contacts 9-1 and 9-4 are electrically connected, the inverter 9 changes the rotation speed of the compressor 11 to the first rotation speed N ₁ (> N). ₂ ) Output the pulse signal of the converted frequency.

Curve E of FIG._FiveIs the status transmission switch 4
2 represents an ON-OFF state. Curve E₆Is a pressure switch
12 represents an ON-OFF state. Curve E₇Is supply route 1
3 represents the pressure fluctuation on 3. Straight line E₈Is the excitation of the solenoid on-off valve 20
Indicates the demagnetized state. When the compressor 11 is not operating
Since the pressure on the supply path 13 is atmospheric pressure,
Expression pressure switch 12 is in the ON state. Time t₀Is three
This shows the time when the phase alternating current power supply 41 is turned on. Three-phase AC power supply 41 throws
When entered, relay CR₁Is excited and the normally closed contact CL₁₁But
Open and normally open contact OP₁₂, OP₁₃Closes. This state
In the state, the contacts 9-1 and 9-2 are electrically disconnected,
The 9-3 and the contacts 9-1 and 9-4 are electrically connected.
That is, when the three-phase AC power supply 41 is turned on, the compressor 11 turns on.
Rolling speed N ₃To start rotating. The pressure is generated by the operation of the compressor 11.
Compressed air is supplied to the air jet loom 1 via the supply path 13.
Supplied.

The pressure on the supply path 13 is the first reference pressure P.
_When it exceeds ₁ , the pressure switch 12 turns off and the relay CR
₁ degauss. When relay CR ₁ is demagnetized, normally closed contact C
As L ₁₁ closes, normally open contacts OP ₁₂ , OP ₁₃ open.
In this state, the contacts 9-1 and 9-2, the contacts 9-1 and 9-3, and the contacts 9-1 and 9-4 are all electrically disconnected. Therefore, the inverter 9 stops outputting the pulse signal, and the operation of the compressor 11 stops. The compressed air on the supply path 13 is supplied to the weft inserting main nozzle 5 via the pressure regulator 6. The pressure regulator 6 is set to a pressure P ₃ lower than the second reference pressure P ₂ . The pressure regulator 6 has a pressure P ₃
The compressed air having a higher pressure is reduced to the pressure P ₃ and supplied to the weft inserting main nozzle 5. This supplied air is jetted from the weft inserting main nozzle 5 at a pressure P ₃ . The pressure P ₃ is a low pressure, and the posture of the tip of the weft Y during standby for weft insertion is adjusted to be linear by low-pressure air injection. The linear posture of the tip portion of the weft Y in the weft insertion standby contributes to the prevention of the weft insertion error.

The supply path 13 is generated when the compressor 11 is stopped.
The pressure on the top drops. When the pressure on the supply path 13 falls below the second reference pressure P ₂ , the pressure switch 12 is turned on and the compressor 11 starts rotating at the rotation speed N ₃ . Therefore, the pressure on the supply path 13 when the usage status transmission switch 42 is in the OFF state is the first set pressure P ₁ and the second set pressure P ₁ .
Specified between ₂ and.

Time t ₁ is when the activation switch 3 is turned on. The loom control computer C ₀ turns on the start switch O
In response to the N signal, the usage status transmission switch 42 shown in FIG.
Turn ON. The usage status transmission switch 42 is turned on based on the output of a weaving start signal from the loom control computer C _0.
Then, it is turned off based on the output of the weaving stop signal from the loom control computer C ₀ . The loom control computer C ₀ outputs a weaving stop signal to the use condition transmission switch 42 in response to the output of the weft insertion error detection signal.

When the start switch 3 is turned on, the loom control controller is turned on.
Pewter C₀Activates the loom drive motor 2 and
Excitation / demagnetization control of the magnetic on-off valve 4 is performed. Excitation of solenoid valve 4
By demagnetizing, weft insertion main nozzle 5 and weft insertion auxiliary nozzle
Each of the sluices will move within a specified rotation angle range during one rotation of the loom.
A. With this air injection, weft Y is inserted.
Done. Compressed air consumption by weft insertion air injection is
Second rotation speed N₂Supplied by a compressor 11 that operates at
Exceeds the amount of compressed air supplied and the pressure on the supply path 13
It decreases. The pressure on the supply path 13 is the second reference pressure
P₂When it falls below the relay CR₁Is excited. Both relays CR
₁, CR₂Normally closed contact CL when is excited₁₁, CL_{twenty two}But
Open, normally open contact OP₁₂, OP₁₃, OP_{twenty one}, OP_{twenty three}Closed
It In this state, between contacts 9-1 and 9-2 and contacts 9-1 and 9-3
Between the contacts 9-1 and 9-4 is electrically disconnected.
Connected. Therefore, the compressor 11 has the first rotation speed.
N ₁To rotate. Weft insertion main nozzle 5 and weft insertion
Elimination of compressed air by weft insertion air injection from an auxiliary nozzle
Cost is the first rotation speed N₁Supplied from the compressor 11 operating at
Less than the amount of compressed air supplied. Therefore, the supply route
The pressure on 13 rises.

The pressure on the supply path 13 is the first reference pressure P.
_When it exceeds ₁ , the relay CR ₁ is demagnetized. Therefore, both relays CR ₁ and CR ₂ are switched from the excited state to the relay CR ₁ being demagnetized and the relay CR ₂ is switched to the excited state, and the compressor 11 is decelerated from the _first rotation speed N ₁ to the second rotation speed N ₂ . To do. Due to this deceleration, the pressure on the supply path 13 decreases from the first reference pressure P ₁ toward the second reference pressure P ₂ . That is, the pressure on the supply path 13 when the starting switch 3 is in the ON state is defined between the first reference pressure P ₁ and the second reference pressure P ₂ .

When the start-up switch 3 is in the ON state, consumption of compressed air in the air jet room 1 is large. ON-OFF of compressor when compressed air consumption is large
If the compressed air supply is controlled by control, a sudden decrease in the compressed air supply pressure cannot be avoided. A sharp drop in supply pressure causes weft insertion errors. In the present embodiment, the width between the reference pressures P ₁ and P ₂ can be narrowed by properly selecting the _two set rotational speeds N ₁ and N ₂ of the compressor 11, and the fluctuation of the weft inserting air injection pressure can be achieved. Can be regulated within a range that does not interfere with good weft insertion. Therefore, the pressure fluctuation on the supply path 13 is regulated between the reference pressures P ₁ and P ₂ , and the supply pressure does not suddenly drop. As a result, weft insertion errors due to a sudden drop in supply pressure are avoided.

The control circuit shown in FIG. 2 incorporates a timed switch TR ₀ and a timed relay TR which constitute the spray control means. The normally closed contact CL ₂₃ , the normally closed contact CL ₃ , the normally open contact OP ₃₁ and the relay CR ₃ are associated with the spray control means.
When the normally closed contact CL ₂₃ is switched from the open state to the closed state, the timed relay TR operates for the set period T, and the timed switch TR ₀ is closed only for the set period T. Therefore, the relay CR ₃ operates only during the set period T, and the normally open contact OP ₃ closes only during the set period T.

The curve E _{11 in} FIG. 5 represents the rotational speed of the compressor 11. A curve E ₂₁ is a curve representing switching between electrical connection and electrical disconnection between the terminals 9-1 and 9-2. Straight line E ₃₁ is terminal 9-
It is a curve showing switching between electrical connection and electrical disconnection between 1 and 9-3. A curve E ₄₁ is a curve representing switching between electrical connection and electrical disconnection between the terminals 9-1 and 9-4. Curve E ₅₁ represents the ON-OFF state of the transfer switch 42. The curve E ₆₁ represents the ON-OFF state of the pressure switch 12. The curve E ₇₁ represents the pressure fluctuation on the supply path 13. A curve E ₈₁ represents the excitation / demagnetization of the solenoid opening / closing valve 20. Time t ₂ represents the time when the use status transmission switch 42 is turned off due to the occurrence of a weft insertion error. Time t ₃ represents the time when the use condition transmission switch 42 is turned on after the weft processing operation of the weft processing device 30 is completed, that is, the time when the weaving is restarted. Timed switch TR ₀ and timed relay T
The R operates when the usage status transmission switch 42 is turned off. By this operation, between the contacts 9-1 and 9-2 and between the contacts 9-1 and 9-2
The electrical cut-off state between -3 is O of the usage status transmission switch 42.
It continues only during the set period T from FF time t ₂ . The set period T is set equal to the period (t ₃ −t ₂ ). Therefore, the inverter 9 changes the rotation speed of the compressor 11 to the first rotation speed N ₁ or the second rotation speed N ₂ according to the ON-OFF state of the pressure switch 12 even during the weft processing operation period of the weft processing device 30. The pulse signal corresponding to is output.

When the normally open contact OP ₃ is open, the electromagnetic on-off valve 20 is demagnetized, and the blow nozzles 16 to 19 do not inject compressed air. The operation of the timed switch TR ₀ and the timed relay TR causes the normally open contact OP ₃ to be closed, and the electromagnetic opening / closing valve 20 is excited. Excitation of the electromagnetic on-off valve 20 causes compressed air to be blown from the supply path 13 through the blow nozzle 1
6 to 19, and blow nozzles 16 to 19 inject compressed air. This injection is in the substantially same direction as the blowing direction of the fan devices 14-2 and 15-2. Therefore, the heat exchanger 14-
The foreign matter adhering to 1, 15-1 is blown off by the jetting action of the blow nozzles 16-19, and the deterioration of the heat exchange efficiency in the heat exchangers 14-1, 15-1 due to the adhering foreign matter is prevented.

The air injection amount in the weft processing device 30 is
This is smaller than the amount of air jetted from the weft insertion main nozzle 5 and the weft insertion auxiliary nozzle during weaving. Therefore,
When the weft insertion error is processed after the occurrence of the weft insertion error, there is a margin in the production of compressed air in the compressed air supply device 7. When compressed air is used to remove the foreign matters adhering to the heat exchangers 14-1 and 15-1 when there is such a margin, the original purpose of using compressed air for weft insertion is hindered. Absent. Moreover, the compressed air supply device 7 is not overloaded. Such an advantage is obtained by the existence of the usage status transmission means, namely the loom control computer C ₀ and the usage status transmission switch 42.

In this embodiment, the electromagnetic on-off valve 20 is energized during the weft insertion error processing of the weft processing device 30, but the electromagnetic on-off valve 20 is energized during a part of the weft insertion error processing. You can also do so.

Next, the embodiment shown in FIG. 8 will be described. The same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. In the discharge flow rate determination circuit 44 of the compressed air supply device 43 in this embodiment, the time switch TR ₀ and the time relay TR as in the first embodiment are not used, and the anemometer 4 is used.
5, 46 are arranged near the heat exchangers 14-1, 15-1. The heat exchangers 14-1 and 15-1 are fan devices 14-2 and 1
Although being subjected to the blowing action of 5-2, the anemometers 45 and 46 measure the flow velocity of the air passing through the heat exchangers 14-1 and 15-1. When the wind speed detected by the anemometers 45 and 46 becomes equal to or lower than the set value, the anemometers 45 and 46 output an excitation signal to the electromagnetic on-off valve 20. As the amount of foreign matter attached to the heat exchangers 14-1 and 15-1 increases, the flow velocity of air passing through the heat exchangers 14-1 and 15-1 decreases. The set value is the heat exchanger 14
-1 and 15-1 is a guideline for the amount of foreign matter that cannot be ignored. Also in this embodiment, foreign matters adhering to the heat exchangers 14-1 and 15-1 are removed by blowing compressed air produced by the compressed air supply device 43. Moreover, since it is performed when it is necessary to remove the foreign matter, there is no unnecessary air consumption.

Next, the embodiment shown in FIGS. 9 and 10 will be described. The same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. In the air jet loom 1 of this embodiment, a yarn feeding processing device 47 shown in FIG. 10 is adopted. The yarn supply processing device 47 includes the weft processing device 30 shown in FIG. As shown in FIG. 9, the yarn feeding processing device 47 receives the command control of the yarn feeding processing control computer C ₂ . The yarn feeding processing control computer C ₂ controls the yarn feeding processing device 47 in response to the detection signals from the yarn breakage sensors 53 and 60 and the weft yarn detector 34. The weft processing control computer C ₁ controls the weft processing device 30 when a weft insertion error occurs, as in the above-described embodiment.

FIG. 10 shows the weft supply path of the weft Y when the loom is operating. When the weft Y is cut on the yarn feeding path between the yarn feeding guide nozzle 52 and the intermediate nozzle 58, the second yarn breakage sensor 6
0 detects this thread breakage. When the weft Y is cut on the yarn feeding path between the weft cheese 48 and the yarn feeding guide nozzle 52,
The first thread break sensor 53 detects this thread break. The yarn feeding control computer C ₂ sends a weaving stop signal to the weaving machine control computer C ₀ in response to the yarn breakage detection signal, and the weaving machine control computer C ₀ issues a weaving stop command in response to this signal. After the machine base is stopped, the machine base is reversely rotated by a predetermined amount, and the weft insertion main nozzle 5 is stopped at the last retracted position in the swing region.
After the machine base reverses, the electromagnetic solenoid 55 is excited and the locking pin 5
5-1 is separated from the bobbin winding surface 54-2.

When the second yarn break sensor 60 detects the yarn break, the electromagnetic on-off valves 62 and 63 are excited for a predetermined time,
The yarn feeding guide nozzle 52, the blowing nozzle 56, the delivery nozzle 61, and the discharge nozzle 59 eject. When a yarn breakage occurs between the weft yarn length measuring and storage device 54 and the intermediate nozzle 58, the yarn breakage tip portion is delivered to the delivery nozzle 61 and the discharge nozzle 59.
Is discharged to the dust box 64 from the discharge pipe 58-1. When the yarn breakage occurs between the yarn feeding guide nozzle 52 and the weft measuring and storing device 54, the yarn breakage tip portion is ejected by the yarn feeding guide nozzle 52 and the blowing nozzle 56 to cause the yarn winding tube 54-1. After passing through, the particles are discharged from the discharge pipe 58-1 to the dust box 64 by the jetting action of the transfer nozzle 61 and the discharge nozzle 59. Then, the electromagnetic cutter 57 is operated and the wefts are cut and aligned. After that, the electromagnetic on-off valves 62 and 65 are excited,
The weft processing device 30 operates, and the cut and aligned weft ends are guided to the discharge pipe 35 through the yarn winding tube 54-1, the intermediate nozzle 58 and the weft insertion main nozzle 5. Based on the yarn presence detection of the weft detector 34, the weft processing device 30 processes the weft in the same manner as in the above embodiment.

When the first yarn break sensor 53 detects a yarn break, the electromagnetic on-off valves 51, 62 and 65 are excited for a predetermined time, and the weft processing device 30 is operated. The yarn starting end portion Y ₁ of the preliminary cheese 49 is blown into the yarn feeding guide nozzle 52 by the jetting action of the yarn feeding switching nozzle 50. The yarn starting end portion Y ₁ is discharged from the discharge pipe 3 by the jetting action of the yarn feeding guide nozzle 52, the blowing nozzle 56, the delivery nozzle 61 and the intermediate nozzle 58, and the operation of the weft processing device 30.
You will be guided to 5. Based on the yarn presence detection of the weft detector 34, the weft processing device 30 processes the weft in the same manner as in the above embodiment.

When the yarn feeding processing device 47 detects a yarn feeding error, the yarn feeding processing control computer C ₂ outputs a yarn feeding error detection signal to the loom control computer C ₀ . The loom control computer C ₀ outputs a weaving stop signal in response to the input of the yarn feeding error detection signal, and the use status transmission switch 42 is turned off.
To do. The discharge flow rate determination circuit 8 has a usage status transmission switch 42.
The blow nozzles 16 to 19 perform air injection based on the turning off of the blow nozzles.

Further, in the present invention, the solenoid on-off valve 2 of the above embodiment is used.
An embodiment in which the excitation / demagnetization of 0 is controlled by a timer, or compressed air is jetted from the blow nozzles 16 to 19 for a predetermined time each time weaving is stopped is also possible.

The technical ideas other than the claims which can be understood from the above-described embodiments will be described below together with their effects. (1) In claim 2, the anemometer for measuring the wind speed of the air passing through the heat exchanger and cooling is installed, and the operation of the spraying means is controlled based on the wind speed information detected by the anemometer. Air supply device.

When it is necessary to remove the foreign matter adhering to the heat exchanger, the spraying means can be operated and wasteful air consumption can be avoided.

[0047]

As described above in detail, in the invention of claim 1, the compressed air produced by the compressed air supply device is used for removing foreign matters adhering to the compressed air supply device. It is possible to prevent the adverse effect of foreign matter adhesion in the device.

According to the second aspect of the present invention, since the compressed air is blown to the heat exchanger in the compressed air supply device, it is possible to prevent deterioration of the heat exchange function of the heat exchanger. According to the third aspect of the invention, the operation of the spraying means is controlled based on the usage status of the compressed air in the compressed air consuming device, so that the original purpose of consuming the compressed air in the compressed air consuming device is hindered. Instead, compressed air may be used for other purposes.

In the invention of claim 5, the spraying means is operated at least at a part of the operation of the weft processing device in the air jet loom, so that the original purpose of compressed air consumption for weft insertion is hindered. Compressed air can be used for other purposes without occurring.

[Brief description of drawings]

FIG. 1 is a control circuit diagram showing a first embodiment embodying the present invention.

FIG. 2 is a detailed control circuit diagram.

FIG. 3 is a side sectional view showing a weft processing device.

FIG. 4 is a timing chart showing an excitation / demagnetization state of an electromagnetic opening / closing valve of a spraying unit.

FIG. 5 is a timing chart showing an excitation / demagnetization state of an electromagnetic opening / closing valve of the spraying means.

FIG. 6A is a perspective view of a compressed air supply device. FIG. 6B is a perspective view showing another example of the foreign matter intrusion prevention mechanism.

FIG. 7 is an exploded perspective view showing a foreign matter intrusion prevention mechanism.

FIG. 8 is a control circuit diagram showing another example.

FIG. 9 is a control circuit diagram showing another example.

FIG. 10 is a side sectional view showing a yarn feeding processing device.

[Explanation of symbols]

1 ... Air jet loom used as compressed air consuming device,
43 ... Compressed air supply device, 11 ... Compressor, 14-1, 15
-1 ... Heat exchanger, 16 to 19 ... Blow nozzle constituting blowing means, 20 ... Electromagnetic on-off valve constituting blowing means, 30 ...
Weft processing device, 42 ... Usage status transmission switch constituting usage status transmission means, 45, 46 ... Anemometer, C ₀ ... Loom control computer constituting usage status transmission means, TR ₀ .
Time switch, which constitutes the spray control means, TR ... A time relay which constitutes the spray control means.

Claims (5)

[Claims] 1. A compressed air supply device comprising a compressor for producing compressed air for supplying to a compressed air consuming device, for blowing a part of the compressed air produced by the compressor to the compressed air supply device. Compressed air supply device incorporating spraying means. 2. The compressed air supply device according to claim 1, wherein the object to be sprayed by the spraying means is a heat exchanger in the compressed air supply device. 3. A usage status transmitting means for transmitting the compressed air usage status in the compressed air consuming device, and a spraying control means for controlling the operation of the spraying means based on the usage status information transmitted by the usage status transmitting means. The compressed air supply apparatus according to any one of claims 1 and 2, further comprising: 4. The compressed air supply device according to claim 1, wherein the compressed air consumption device is an air jet loom. 5. The air jet loom is provided with a weft processing device for coping with a weft insertion error using compressed air, and the spraying control means operates the spraying means at least at a part of the operation of the weft processing device. 4. The compressed air supply device according to 4.