JP2007211358A - Cooling device of air jet loom - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling device of an air jet loom, which is capable of cooling the heat generation source of the loom and ensures stable weft insertion performance. <P>SOLUTION: The air jet loom has regulators 22, 27, air tanks 21, 26 and on-off valves 19, 20, 23, 24, 25 successively arranged on an air pipe 18 extending from an air source 30 to a weft-insertion nozzle. Heat-exchange is carried out in a pipe section 18a on the upstream side of the on-off valves 19, 20, 23, 24, 25 between air flowing in the pipe section 18a of the air pipe 18 and the shedding drive motor 32 as a heat-generation source constituting a functional part of the loom. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

  The present invention relates to an apparatus for cooling a heat generation source in an air jet loom with a weft supply air.

  In the prior art disclosed in Patent Document 1, a cooling device in an air jet loom is disclosed, and a stepping motor 24 as a rotation output device is disposed adjacent to the weft insertion tandem nozzle 13 to form a hexahedral shape. The side wall surface 243 of the body 242 of the stepping motor 24 is in surface contact with the side wall surface 154 of the nozzle body 15 of the tandem nozzle 13. The movable body 26 is fastened to the rotor shaft 241 of the stepping motor 24, and the movable body 26 is rotated to change the path of the weft Y from the linear first path to the bent second path. At the end of the weft insertion, the weft Y is shifted to the bent second path, so that the weft insertion speed is reduced due to the braking action.

Part of the heat generated by the stepping motor 24 when energized is transferred to the nozzle body 15 via the side wall surface 154 of the nozzle body 15 from the side wall surface 243 of the body 242 that is in surface contact. A part of the heat transmitted to the nozzle body 15 is dissipated by the air flow in the tandem nozzle 13 generated every weft insertion, so that the cooling effect of the stepping motor 24 is enhanced.
Japanese Patent Laying-Open No. 2005-42254 (pages 3 to 6, FIGS. 1 to 4)

However, the technique disclosed in Patent Document 1 can be used only for cooling the motor of the weft braking device disposed adjacent to the weft insertion nozzle, and cannot be used for cooling other heat generation sources in the loom. There's a problem.
Furthermore, in the case of a multicolor weaving loom having a plurality of weft insertion nozzles, the energization cycle of the weft braking motor provided for each nozzle is different, and the amount of heat exhausted from the weft braking motor changes. Such a variation in the amount of exhaust heat causes a pressure variation in the air flow injected from the weft insertion nozzle, which may adversely affect the weft insertion performance.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a cooling device in an air jet loom that can cool a heat generation source of a loom and can ensure stable weft insertion performance. It is in.

In order to achieve the above object, an invention according to claim 1 is provided with an air pipe connecting a weft insertion nozzle and an air supply source, and the pressure of the air supplied from the air supply source is inserted into the air pipe. An air jet that sequentially arranges a regulator that adjusts the pressure suitable for the pressure, an air tank that stores air at a pressure adjusted by the regulator, and an on-off valve that controls the supply of air stored in the air tank to the weft insertion nozzle In the room, heat exchange is performed between air flowing in the air pipe upstream of the on-off valve and a heat generation source constituting a functional component of the loom.
According to the invention of claim 1, since heat exchange is performed between the air flowing in the air pipe and the heat generation source constituting the functional component of the loom, the heat of the heat generation source is transmitted to the air, The heat generation source can be cooled. The weft supply air can be used to cool the heat generation source, and a new fan or the like need not be provided for cooling.
In addition, the air piping upstream of the on / off valve forms a closed pipe (a pipe portion that is not open to the atmosphere) when the on / off valve is closed, so that heat is transferred to the air in the closed pipe and the temperature rises. Then, the pressure of air rises. The pressure of the air inside the closed pipe formed by closing the on-off valve can be controlled to a constant pressure by a regulator that adjusts the pressure of the air supplied from the air supply source to a pressure suitable for weft insertion. Accordingly, it is possible to supply air controlled to a constant pressure to the weft insertion nozzle, and even if fluctuations in the amount of exhaust heat occur in the heat generation source, the weft insertion performance is not affected and stable air supply is possible. It becomes. And since the pressure of supply air is raised, the driving force of weft insertion improves and high-speed driving | operation is attained.

According to a second aspect of the present invention, in the cooling device in the air jet loom according to the first aspect, heat exchange is performed between the air flowing in the air pipe upstream of the regulator and the heat generation source. Features.
According to the second aspect of the present invention, heat is exchanged with the heat generation source on the upstream side of the regulator, so that the pressure fluctuation in the piping section upstream of the regulator spreads to the weft insertion air in the air tank. Is reliably prevented.

According to a third aspect of the present invention, in the cooling device in the air jet loom according to the first or second aspect, a jacket is provided around the heat generation source, and the air flowing in the air pipe is circulated in the jacket. Features.
According to the invention described in claim 3, since the jacket is provided around the heat generation source, the heat generated from the heat generation source is reliably diffused to the air circulated in the jacket without being diffused to the surroundings. This makes it possible to increase the cooling efficiency of the heat generation source.

According to a fourth aspect of the present invention, in the cooling apparatus for an air jet loom according to the first aspect, a heat pump is interposed between the heat generation source and the air in the air pipe, and the heat generation source and the air pipe It is characterized by being thermally connected to air.
According to the fourth aspect of the present invention, the heat generated by the heat generation source can be reliably transmitted to the air in the air pipe by the heat pump, and the heat generation source can be reliably cooled. Furthermore, since it is not necessary to increase the length of the air piping for heat exchange, the piping resistance can be reduced.

  According to the present invention, the heat generation source can be cooled by exchanging heat between the heat generation source of the loom and the weft insertion air, and stable weft insertion performance can be ensured.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the weft insertion nozzle in the loom is composed of a main nozzle 13 and sub nozzles 14, 15 and 16, and the main nozzle 13 is composed of a first weft insertion nozzle 13a and a second weft insertion nozzle 13b. Are arranged in series. The sub nozzles 14, 15, and 16 are formed of a plurality of (in this case, four) nozzle groups, and are arranged on the slay 17 in the weft insertion direction.
At the side of the main nozzle 13, a yarn supplying section 11 for supplying the weft Y and a weft length measuring and storing device 12 for storing the supplied weft Y to a predetermined length are arranged.

  In the air piping 18 extending from the air supply source 30 side to the first weft insertion nozzle 13a and the second weft insertion nozzle 13b, between the supply air flowing in the air piping 18 and the heat generation source constituting the functional parts of the loom. A heat exchanging section 29 that performs heat exchange, an air filter 28, a regulator 22 that adjusts the pressure of the air stored in the air tank 21, a weft insertion main nozzle air tank 21 that stores the pressure-adjusted air by the regulator 22, and the first and first On-off valves 19 and 20 for two weft insertion nozzles 13a and 13b are sequentially arranged.

  On the other hand, the air pipe 18 branches downstream of the heat exchanging section 29, a regulator 27 for adjusting the pressure of air stored in the air tank 26 up to the sub nozzles 14, 15, 16 and a weft insertion for storing the pressure-adjusted air. The sub nozzle air tank 26 and the on / off valves 23, 24, 25 for the sub nozzles 14, 15, 16 are sequentially arranged. The air piping 18 includes a piping portion 18 a upstream of the regulators 22 and 27, a piping portion 18 b connecting the regulators 22 and 27 to the on-off valves 19, 20, 23, 24 and 25, and on-off valves 19, 20 and 23. , 24, 25 and a piping part 18c connecting the main nozzle 13 and the sub nozzles 14, 15, 16 to each other.

As shown in FIG. 2, the drive box 31 of the electronic opening device is attached to the outer surface of the side frame 35 of the loom, and a plurality of crank rods 36 project from the drive box 31 toward the loom main body, and the crank rod 36 Is connected to the frame through a link mechanism (not shown).
The heat exchanging unit 29 is provided in a drive box 31 of the electronic opening device, and a plurality of opening drive motors 32 as heat generation sources constituting functional parts of the loom are attached to the drive box 31. A jacket 33 is mounted around the opening drive motor 32 so as to cover the periphery of the opening drive motor 32. A space 34 is formed between the periphery of the opening drive motor 32 and the jacket 33, and this space 34 forms an air passage.

  The space 34 formed in the periphery of the upper four opening drive motors 32 and the space 34 formed in the periphery of the lower four opening drive motors 32 are connected at one end. The other end is connected to the air supply source 30 and the regulators 22 and 27 by a pipe 37. The air supplied from the air supply source 30 circulates through the space portion 34, whereby heat exchange is performed between the peripheral portion of the opening drive motor 32 and the air, and heat is taken away from the peripheral portion of the opening drive motor 32. . That is, the aperture drive motor 32 generates heat by driving the aperture drive motor 32 and the peripheral portion becomes hot. A part of this heat is taken away by the air flowing through the space 34, so that the opening drive motor 32 can be cooled.

Here, assuming that air of pressure P1, volume V1, and temperature (absolute temperature) T1 is supplied from the air supply source 30, heat exchange is performed by passing through an opening drive motor 32 as a heat generation source of the loom. The supply air takes heat from the opening drive motor 32 and the temperature rises. At this time, if the air after passing is pressure P2, volume V2, and temperature (absolute temperature) T2, the following equation is established from the gas state equation.
P1 / V1 / T1 = P2 / V2 / T2
Here, air is in a closed pipe that is blocked from outside air, and V1 = V2 and T1 <T2, so
P1 <P2, and the air pressure P2 after heat exchange increases.
As shown in FIG. 1, the supply air whose temperature and pressure have increased is adjusted to a pressure Pm (Pm <P2) as weft insertion main nozzle air by the regulator 22 and stored in the air tank 21, and by the regulator 27. The weft insertion sub-nozzle air is adjusted to a pressure Ps (Ps <P2) and stored in the air tank 26.

The effect | action is demonstrated about the cooling device in an air jet loom with the above structure.
The air supplied from the air supply source 30 passes through the pipe part 18 a of the air pipe 18 and reaches the heat exchange part 29.
The supplied air flows through the space 34 formed between the peripheral portion of the opening drive motor 32 and the jacket 33, so that heat is exchanged between the peripheral portion of the opening drive motor 32 and the air. The heat is taken away from the periphery of the opening drive motor 32.

  A part of the air whose temperature and pressure has increased due to the deprived heat passes through the regulator 22 through the pipe part 18a of the air pipe 18, and is stored in the air tank 21 constituting a part of the pipe part 18b.

A warp fed from a yarn beam (not shown) is opened by a heel frame. In response to a signal from a control device (not shown), the on-off valves 19 and 20 are opened, and air having a pressure Pm is supplied from the air tank 21 to the first weft insertion nozzle 13a and the second weft insertion nozzle 13b. The second weft insertion nozzle 13b performs air injection.
The weft Y is pulled out to the second weft insertion nozzle 13b from the weft length measuring and storage device 12 connected to the yarn supplying section 11, and is injected from the first weft insertion nozzle 13a into the weft opening in the weft insertion direction.
When the weft Y is inserted into the warp opening, the open / close valves 23, 24, 25 are sequentially opened / closed, and air of pressure Ps is relay-injected from the air tank 26 from the sub nozzles 14, 15, 16 in the weft insertion direction. Towed. When the weft insertion is completed, the weft Y is beaten by the reed 38 to form a woven fabric.

The cooling device in the air jet loom according to this embodiment has the following effects.
(1) Heat exchange is performed between the air flowing through the pipe portion 18a upstream of the on-off valves 19, 20, 23, 24, and 25 and the opening drive motor 32 as a heat generation source constituting the functional parts of the loom. Therefore, the fluctuation of the air pressure in the piping part 18a due to the fluctuation of the exhaust heat amount of the opening drive motor 32 is adjusted by the regulators 22 and 27, and the weft insertion performance is not adversely affected.
(2) Since the heat exchanging portion 29 is provided in the piping portion 18a upstream of the regulators 22 and 27 and heat exchange is performed between the supply air and the opening drive motor 32, the temperature of the air that has risen due to the heat exchange The pressure is adjusted to appropriate weft insertion pressures Pm and Ps by the regulators 22 and 27, respectively, and can be stored in the air tanks 21 and 26.
(3) It is possible to supply air that is increased in temperature and pressure and controlled to constant pressures Pm and Ps to the main nozzles 13a and 13b and the sub nozzles 14, 15, and 16 for weft insertion, affecting the weft insertion performance. Stable air supply is possible. Further, since the pressure of the supply air is increased, the driving force for weft insertion is increased and high-speed operation is possible.
(4) Since the jacket 33 is provided around the opening drive motor 32, the heat generated by the opening drive motor 32 can be confined in the jacket 33 without diffusing to the surroundings. Then, the air confined in the jacket 33 is dissipated by circulating the air supplied from the air supply source 30 in the space 34 formed between the peripheral portion of the opening drive motor 32 and the jacket 33. The cooling efficiency of the opening drive motor 32 can be increased.
(5) Air consumption can be reduced as compared with the case where the air from the air supply source 30 is directly used for weft insertion without heat exchange.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG.
In this embodiment, the heat exchange method in the first embodiment is changed.
Therefore, here, for convenience of explanation, a part of the reference numerals used in the previous explanation is used in common, the explanation of the common configuration is omitted, and only the changed part is explained.

  As shown in FIG. 3, in this embodiment, the opening drive motor 32 as a heat generation source of the loom and the air in the air tank 26 are thermally connected via a heat pump 40. The heat pump 40 performs heat exchange with the heat generation source to remove heat from the heat generation source, and dissipates the heat taken to the supply air in the air tank 26 to perform heat exchange with the supply air. A fluid is used as a heat exchange medium that circulates in the heat pump 40. That is, the heat exchange medium circulating in the heat pump 40 absorbs heat from the opening drive motor 32 as a heat generation source in the heat absorption part 41, and transmits heat to the supply air in the heat radiation part 42 to radiate heat.

Therefore, in the heat absorption part 41, the opening drive motor 32 is cooled by removing heat from the opening drive motor 32. Further, in the heat radiating section 42, the deprived heat is transmitted to the supply air, so that the temperature and pressure of the air in the air tank 26 rise.
The temperature and pressure of the air in the air tank 26 increased by heat exchange are adjusted to an appropriate weft insertion pressure Ps by providing the regulator 27 with a relief valve function for reducing the air pressure in the air tank 26.

The cooling device in the air jet loom according to this embodiment has the following effects.
(1) The air in the air tank 26 and the opening drive motor 32 serving as a heat generation source of the loom are connected by a heat pump 40, and the heat exchange medium circulating in the heat pump 40 causes the opening drive motor in the heat absorbing section 41. Since the heat is absorbed from 32 and the heat is transferred to the supply air by the heat radiating section 42 to dissipate the heat, the opening drive motor 32 can be cooled. The fluctuation of the air pressure in the air tank 26 as a part of the pipe portion 18b due to the fluctuation of the exhaust heat amount of the opening drive motor 32 is adjusted by the regulator 27, and the weft insertion performance is not adversely affected.
(2) It becomes possible to supply the sub-nozzles 14, 15, 16 for weft insertion with the temperature and pressure increased by the heat from the opening drive motor 32 and controlled to a constant pressure Ps, affecting the weft insertion performance. Stable air supply is possible. Further, since the pressure of the supply air is increased, the traction force in the weft insertion direction is increased and high speed operation is possible.
(3) The air consumption can be reduced as compared with the case where the air from the air supply source 30 is directly used for weft insertion without heat exchange.
(4) Compared to the first embodiment, it is not necessary to increase the length of the air pipe 18 for heat exchange, so that the pipe resistance does not increase.

(Third embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG.
In this embodiment, the number of the heat exchanging portions in the first embodiment is increased.
Therefore, here, for convenience of explanation, a part of the reference numerals used in the previous explanation is used in common, the explanation of the common configuration is omitted, and only the changed part is explained.

As shown in FIG. 4, in this embodiment, a part of the air pipe 18 extending from the air supply source 30 to the heat exchange unit 29 is branched to form an air pipe 51, and another heat exchange is performed in the air pipe 51. A portion 50 is provided. The branch point of the air pipe 51 is S1 and the junction is S2.
In the heat exchanging section 29, heat exchange is performed between the opening drive motor 32 and the supply air, and heat generated by the opening drive motor 32 is transmitted to the supply air, and the opening drive motor 32 is cooled. On the other hand, in the heat exchange part 50 provided in the direction of the air pipe 51, heat exchange is performed between the other heat generation source of the loom and the supply air, and the other heat generation source is cooled. .

Here, for example, when the other heat generation source is the main drive motor of the loom, the periphery of the main drive motor is covered with a jacket as in the case of the opening drive motor 32, and between the jacket and the periphery of the main drive motor. A space is formed, and supply air is circulated through the space. The heat generated by the main drive motor is taken away by the supply air flowing through the space, and the main drive motor is cooled.
The supply air whose temperature has risen by passing through the opening drive motor 32 and the supply air whose temperature has risen by passing through the main drive motor merge at point S2 in the air pipe 18 and are installed downstream of the air pipe 18. The air tanks 21 and 26 are adjusted to a predetermined pressure and stored.

The cooling device in the air jet loom according to this embodiment has the following effects.
Since the effects (3) and (5) of the first embodiment are common, they are omitted and the other effects are described.
(1) A part of the air pipe 18 extending from the air supply source 30 to the heat exchanging section 29 is branched to form an air pipe 51, and another heat exchanging section 50 is provided in the air pipe 51, thereby exchanging heat. In the part 29, the opening drive motor 32 can be cooled, and in the heat exchange part 50, the main drive motor as another heat generation source can be cooled. Since a plurality of heat generation sources can be simultaneously cooled by using the weft insertion supply air, it is not necessary to provide a new fan or the like for cooling, and the apparatus can be prevented from being enlarged and simplified.
(2) Heat exchange units 29 and 50 are provided upstream of the regulators 22 and 27, and heat exchange is performed between the supply air, the opening drive motor 32, and the main drive motor. Are adjusted to appropriate weft insertion pressures Pm and Ps by regulators 22 and 27, respectively, and can be stored in air tanks 21 and 26.
(3) Since the jacket is provided around the opening drive motor 32 and the main drive motor, the heat generated from the opening drive motor 32 and the main drive motor can be confined in the jacket without being diffused to the surroundings. Then, the air supplied from the air supply source 30 is circulated through the space formed between the opening drive motor 32 and the periphery of the main drive motor and the jacket, thereby radiating the heat confined in the jacket. The cooling efficiency of the opening drive motor 32 and the main drive motor can be increased.

The present invention is not limited to the above-described embodiment, and various modifications are possible within the scope of the gist of the invention. For example, the following modifications may be made.
In the first to third embodiments, it has been described that two weft insertion main nozzles are arranged in series, but they may be used alone.
In the first and second embodiments, the heat generation source of the loom is described as an opening drive motor. However, the heat generation source is other than the opening drive motor, for example, a main drive motor, a weft brake motor, an oil bath, etc. It doesn't matter.
In the second embodiment, the heat generation source of the loom and the supply air in the sub-nozzle air tank are connected by a heat pump and heat exchange is performed. However, the heat generation source of the loom and the supply in the air tank for the main nozzle are described. Heat exchange may be performed by connecting air with a heat pump. In addition, separate heat generation sources may be connected to the sub nozzle air tank and the main nozzle air tank by a heat pump, and heat exchange may be performed separately. Also, heat exchange may be performed between the supply air in the air piping upstream of the on-off valve (for example, the piping section between the on-off valve and the air tank) and the heat generation source of the loom instead of the supply air in the air tank. Good.
In the third embodiment, the opening drive motor and the main drive motor have been described as the heat generation source of the loom in the heat exchange unit, but other heat generation sources may be used.
In the third embodiment, it has been described that the air pipe from the air supply source is branched and another heat exchange unit is provided in the branched air pipe. However, two or more branch routes are formed, and each branch route is formed. Each may have a separate heat exchange section. In this case, the plurality of heat generation sources in the loom can be simultaneously cooled.

It is the schematic showing the whole structure of the cooling device in the air jet loom which concerns on 1st Embodiment. It is a principal part enlarged view of the heat exchange part which concerns on 1st Embodiment. It is the schematic showing the whole structure of the cooling device in the air jet loom which concerns on 2nd Embodiment. It is the schematic showing the whole structure of the cooling device in the air jet loom which concerns on 3rd Embodiment.

Explanation of symbols

13 Main nozzle 13a First weft insertion nozzle 13b Second weft insertion nozzle 14, 15, 16 Sub nozzle 18 Air piping 19, 20 Open / close valve (for main nozzle)
21, 26 Air tank 22, 27 Regulator 23, 24, 25 On-off valve (for sub nozzle)
29 Heat Exchanger 30 Air Supply Source 32 Opening Drive Motor

Claims (4)

A regulator for adjusting the pressure of air supplied from the air supply source in the air pipe to a pressure suitable for weft insertion, the air pipe connecting the weft insertion nozzle and the air supply source, and adjusted by the regulator In an air jet room in which an air tank for storing pressure air and an on-off valve for controlling supply of air stored in the air tank to the weft insertion nozzle are sequentially arranged,
A cooling device in an air jet loom, wherein heat exchange is performed between air flowing in the air pipe upstream of the on-off valve and a heat generation source constituting a functional component of the loom. 2. The cooling device for an air jet loom according to claim 1, wherein heat exchange is performed between the air flowing in the air pipe upstream of the regulator and the heat generation source. The cooling device in the air jet loom according to claim 1 or 2, wherein a jacket is provided around the heat generation source, and air flowing in the air pipe is circulated in the jacket. The air jet according to claim 1, wherein a heat pump is interposed between the heat generation source and air in the air pipe, and the heat generation source and air in the air pipe are thermally connected. Cooling device in the room.

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