• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A method of controlling an air jet type loom with a weft inserting nozzle (6, 7), secondary nozzles (8), a first detection sensor (3) of a property value of a weft yarn (11) and a second sensor (10) for detecting a moment of arrival (Tw) at a target position of the weft yarn (11), encompasses the selection of a pattern among several models of reducing the volume of the air jet, implementing a test weaving based on the selected reduction models, the specification of the physical property value and the time of arrival (TW) based on the detection results obtained during the test weaving, determining that the selected reduction model is appropriate when the specified value of physical property and the corresponding specified time of arrival (Tw) at a target position fall within a predetermined allowable range.
    公开号:BE1027122B9
    申请号:E20205198
    申请日:2020-03-27
    公开日:2021-03-29
    发明作者:Masataka Hamaguchi
    申请人:Toyota Jidoshokki Kk；
    IPC主号:
    专利说明:

    Air jet type loom and method of controlling an air jet type loom. [PRIOR ART [5 The present disclosure relates to an air jet type loom, thus | than a method of controlling the air jet type loom. Generally speaking, an air jet type loom is provided with a number of secondary nozzles in addition to a weft inserting nozzle. # Said several secondary nozzles are arranged along a weft thread transport passage # 10 which moves through the air projected from the weft insert nozzle. Said several secondary nozzles are grouped together to form groups of secondary nozzles in an order of arrangement. The secondary nozzles grouped in groups are connected to a common open-close valve and project air from the nozzles only when the common valve is open.
    In air jet type looms, the volume of air consumed by the projection from the nozzles must be reduced. However, simply reducing the volume of air consumption may trigger a delay in the arrival time corresponding to a target position, which may lead to failure in the insertion of the air. weft thread. The arrival time corresponding to a target position represents a time corresponding to the arrival of the weft yarn at a target position. In Japanese Patent Application Publication No. 2012-117156, for example, a technique is disclosed for reducing the air consumption volume of the secondary nozzles by selecting a model from among jet volume reduction models. air, each of these models having a different air jet volume, and performing a test weave to confirm whether the air jet volume reduction model that was selected is appropriate or not. According to the publication of the above patent application, when carrying out the weaving carried out on a trial basis based on the selected model of reduction in the volume of the air jet, the model | selected is determined to be appropriate when the time of arrival | 5 corresponding to a target position falls within an admissible range, but the | The selected model is determined to be inappropriate when the time of arrival corresponding to a target position is outside the allowable range or when the weft thread begins to give slack. When the selected model | is determined to be inappropriate, another model is selected. Then, # 10 the testing performed is performed again to confirm whether the volume reduction model of the newly selected air jet 9 is appropriate or not. When the air projected from the nozzles is used for the weft insertion, the arrival times corresponding to a target position vary depending on the physical properties of the weft threads which are used for the weft insertion. weft, and also as a function of the volume of the air jet emitted by the weft thread insertion nozzle and by the secondary nozzles. The physical properties of the weft threads may vary in the longitudinal direction of the weft threads, even when these weft threads are of the same type in that they have the same material, the same count, and the like. The weft thread which is to be used for inserting the weft thread is fed in the form of a weft thread cheese, which shape it assumes in the coiled state. The physical properties of weft yarns can vary, even among weft cheeses formed by weft yarns of the same type in the coiled state.
    According to the technique disclosed in the above publication of the patent application, it is determined whether or not the selected model of air jet volume reduction is suitable based solely on the time of arrival. corresponding to a target position. In this case, there is the risk of an inadequate determination as to whether the air jet volume reduction model is appropriate or not. For example, the selected model of air jet volume reduction can be determined to be appropriate, even when the selected model is not appropriate, when a value of | physical property of the weft thread which has been inserted during the weaving performed as | 5 test deviates significantly from the mean value. On the other hand, the 9 model selected for reducing the volume of the air jet can be determined as: being inappropriate, even when the model selected is appropriate. 9 The present disclosure arises from the recognition of the circumstances 9 indicated above and is intended to provide an air jet type loom $ 10 capable of more adequately determining whether the model Air jet volume reduction for reducing air jet volume from secondary nozzles is suitable or not, as is a control method of the air jet type loom.
    SUMMARY In accordance with one aspect of the present disclosure, there is provided an air jet type loom which includes a weft inserting nozzle for inserting a weft yarn, a plurality of secondary nozzles arranged in a row. downstream of the weft thread insertion nozzle in a weft thread transport direction, a control unit which controls the air projected from said plural secondary nozzles, a first detection sensor which detects a physical property value of the weft thread which has been inserted by air projected from the weft inserting nozzle, a second detecting sensor which detects an arrival time corresponding to a target position, at which the weft thread inserted by the air projected from the weft inserting nozzle arrives at a target position, a unit acting as a memory in which several models of reducing the volume of the air jet are stored which are prepared in advance and that we use p to reduce the volume of air projected from said plural secondary nozzles, and a selection unit which selects one of said plural models of reducing the volume of the air jet. The control unit controls the projected air | from said several secondary nozzles based on the model chosen from | said multiple air jet volume reduction models, selected by selection unit # 5 for a test weave to be performed, [specifies the physical property value of the weft yarn and the time of arrival | corresponding to a target position of the weft yarn based on the detection results obtained during the test weaving from the first detection sensor and the second detection sensor, and determines # 10 the fact that the model selected for the reduction of the volume of the air jet is # appropriate when the specified value of physical property of the weft yarn falls within a predetermined range and when the specified time of arrival corresponding to a target position falls within a predetermined allowable range.
    In accordance with another aspect of the present disclosure, there is provided a method of controlling an air jet type loom which includes a weft inserting nozzle for inserting a weft yarn, a plurality of secondary nozzles. disposed downstream of the weft thread inserting nozzle in a weft thread conveying direction, a first detection sensor which detects a physical property value of the weft thread which has been inserted by air projected at from the weft inserting nozzle, and a second detecting sensor which detects an arrival time corresponding to a target position, at which the inserted weft thread by air projected from the thread inserting nozzle frame arrives at a target position. The method of controlling the air jet type loom includes selecting one model from several models of reducing the volume of the air jet, which are prepared in advance and used for. reducing the volume of air projected from said plural secondary nozzles, carrying out test weaving through control of the air projected from said plural secondary nozzles based on the model selected from said plural models of reducing the volume of the air jet, specifying the physical property value of the weft yarn; and the arrival time corresponding to a target position of the weft thread based on the detection results obtained during the weaving performed at | 5 test title from the first detection sensor and the second detection sensor | detection, respectively, and determining that the selected model of | reduction in the volume of the air jet is appropriate when the specified value of | physical property of the weft yarn falls within a predetermined range and when | the specified time of arrival corresponding to a target position falls into a | 10 predetermined allowable range. # Other aspects and benefits of disclosure will emerge at | from the following description, when taken in conjunction with the accompanying drawings which illustrate by way of example the principles of the disclosure.
    BRIEF DESCRIPTION OF THE DRAWINGS The disclosure, together with its objects and with its advantages, can be best understood by reference to the following description of the embodiments, together with the accompanying drawings in which: Figure 1 is a view A diagram showing a configuration of a weft inserting apparatus of an air jet type loom in accordance with an embodiment of the present disclosure; Fig. 2 is a block diagram showing a configuration of a control device which is provided for the weft inserting apparatus of the air jet type loom of Fig. 1; FIG. 3 is a schematic diagram showing several models for reducing the volume of the air jet;
    Fig. 4 is a flowchart showing an example of a process for establishing the air jet volume reduction model for the weft inserting apparatus of the jet type loom. air 4 in accordance with the embodiment of the present disclosure; Fig. 5 is a schematic diagram showing a [relation between an arrival time corresponding to a target position of a wire of | weft and a mass of the weft yarn; and | Fig. 6 is a schematic diagram in which an | relation between the arrival moment corresponding to a target position of the wire of | 10 weft and a reduction in the volume of the air jet from the secondary nozzles.
    DETAILED DESCRIPTION OF EMBODIMENTS Fig. 1 is a schematic view showing a configuration of a weft inserting apparatus of an air jet type loom according to an embodiment of the invention. this disclosure.
    As shown in Fig. 1, a weft thread inserting apparatus 1 is equipped with a weft thread cheese 2 upstream in the weft thread transport direction. A sensor 3 for detecting a physical property of the weft yarn is disposed downstream of the weft yarn cheese 2 and a weft yarn holding apparatus 4 is disposed downstream of the sensor 3 for detecting a physical property of the weft. weft thread.
    The weft yarn cheese 2 feeds with a weft yarn 11 which is to be used for a weft yarn insertion the weft yarn holding device 4. The sensor 3 for detecting a physical property of the weft yarn is configured as a first detection sensor. The first detection sensor detects a physical property value of the weft yarn 11 which has been inserted through air projected from a weft inserting nozzle. The detection sensor 3 of a physical property of the weft yarn reports the results of the detection to a controller 31.
    | The physical property value of weft yarn 11 that can be detected by | through the detection sensor 3 of a physical property of the weft yarn | 5 encompasses, for example, a mass per unit length of the weft yarn (hereinafter referred to as "the mass of the weft yarn"), lint on the weft yarn, a diameter of the weft thread, or the like. The mass of the weft yarn can be detected through the use of a capacitive sensor to act as sensor # 3 for detecting a physical property of the weft yarn. Lint on the # 10 weft thread and the weft thread diameter can be detected through the use of an optical sensor 9 which acts as a detection sensor 3 of a physical property of the weft thread. The methods of detecting the values of physical properties, such as weft yarn mass, lint on the weft yarn, and weft yarn diameter are also disclosed in Japanese Patent Application Publication No. 2014-500914 , in particular, in paragraphs 0002, 0003 and 0041. Any physical property selected from the mass of the weft yarn, the lint on the weft yarn and the diameter of the weft yarn, represent the values of physical properties that affect the time of arrival corresponding to a target position. The arrival time corresponding to a target position represents a time when the weft yarn 11 arrives at a target position. Under the same conditions of the air projected from the weft insertion nozzle, the arrival time corresponding to a target position is more delayed as the mass of the weft yarn increases, but the arrival time corresponding to a target position is more advanced when the mass decreases. The arrival time corresponding to a target position is further delayed as the lint on the weft thread decreases, but the arrival time corresponding to a target position is more advanced as the lint increases. The arrival time corresponding to a target position is more delayed as the diameter of the weft thread increases, but the arrival time corresponding to a target position is more advanced as the diameter of the weft thread decreases. In the present embodiment, we | shows an example of the weft yarn physical property detection sensor 3, which detects the mass of the weft yarn as one of the property values | physical weft threads. The weft thread holder 4 holds the weft thread before 9 the weft thread is inserted. The weft yarn holder 4 includes a length measuring drum 15 and a stopper 17. The weft yarn holder 4 maintains the weft yarn 11 in the fed state. from the 9 weft yarn cheese 2, which is to be fed to the weft yarn holder 4 by winding the weft yarn 11 around the length measuring drum
    35.
    The stopper 17 is capable of stopping the weft thread 11 which is used for the insertion of the weft thread. The stopper 17 is driven by an electromagnetic solenoid 19. The electromagnetic solenoid 19 is driven by the controller 31. The operational states of the stopper 17 can be switched via of the controller 31 which controls the drive of the electromagnetic solenoid 19. The operational states of the stopper 17 include a first operational state in which one end of the stopper 17 moves away from the measuring drum of the length 15 in order to release the weft yarn 11, and a second operational state in which the end of the stopper 17 moves to contact the length measuring drum 15 for the purpose of stopping the yarn frame 11.
    A yarn balloon sensor 20 is disposed near the length measuring drum 15. The yarn balloon sensor 20 detects a weft yarn balloon 11 which has been unwound from the length measuring drum 15 in. the first operational state of the stopper 17, and transmits the result of the detection to the control device 31 in the form of an electrical signal. A weft thread tension adjuster 5 adjusts a tension applied to the weft thread 11 to prevent excessive tension exerted on the weft thread 11. | A tandem nozzle 6 and a main nozzle 7 are configured to play the | role of the weft insert nozzle. The main nozzle 7 is arranged downstream | 5 of the tandem nozzle 6 in the direction of transport of the weft yarn. A number of secondary nozzles 8 are arranged downstream of the tandem nozzle 6. {The main nozzle 7 is connected to a main tank 16 through 9 a main valve 12 and the tandem nozzle 6 is connected to the tank. main 16 # via a tandem valve 14. The main tank 16 is connected to # 10 a regulator 18. The regulator 18 regulates the pressure of the compressed air 9 via an air compressor (which is not shown). The main tank 16 stores the compressed air, the pressure of which is regulated by the regulator 18. The compressed air stored in the main tank 16 feeds the main nozzle 7 through the main valve 12 and also feeds the tandem nozzle 6. through the tandem valve 14.
    The main nozzle 7 blasts or stops the air according to the open-close state of the main valve 12. The tandem nozzle 6 blows or stops the air according to the open-close state. of the tandem valve 14. Specifically, the main nozzle 7 blows air when the main valve 12 is opened and stops blasting when the main valve 12 is closed. Likewise, the tandem nozzle 6 blows air when the tandem valve 14 is opened and stops blowing air when the tandem valve 14 is closed. The main valve 12 and the tandem valve 14 are electrically connected to the controller 31. The controller 31 controls the open-close states of the main valve 12 and the tandem valve 14, individually.
    When inserting the weft yarn 11 through the air blown from the tandem nozzle 6 and the main nozzle 7, the compressed air is blown individually from the tandem nozzle 6 and from the main nozzle 7 {through an opening of the main valve 12 and the valve | tandem 14 at predetermined times, respectively. The secondary nozzles 8 are arranged with predetermined intervals between them. The secondary nozzles 8 are configured to stabilize the insertion of the weft yarn 9 via the projection of air in a direction which assists 9 in the movement of the weft yarn 11, in a direction of downstream movement. 9 The weft yarn 11 moves in the longitudinal direction of a ros 9 through the air projected from the tandem nozzle 6 and from the main nozzle # 10 7. The ros 9 is disposed along of the weft thread transport passage 11. 9 The ros 9 beats the weft thread 11 with each weft thread insertion pick. A blade 21 is disposed between the main nozzle 7 and the ros 9. The blade 21 cuts the weft thread 11 each time a piece of the weft thread 11 is inserted, that is to say at each pick. The blade 21 is controlled for its drive by the control device 31.
    The secondary nozzles 8 are arranged along the weft yarn transport passage 11. The secondary nozzles 8 are grouped into groups of secondary nozzles in order of arrangement. Specifically, the secondary nozzles 8 are grouped into six groups, each group including the four secondary nozzles 8 which are adjacent to each other in the longitudinal direction of the ros 9. The number of the secondary nozzles 8 which are part of one of the groups, as well as the number of groups of the secondary nozzles 8, can be set or can be changed as appropriate based on the weaving width.
    Each group of secondary nozzles 8 is associated with a secondary valve 22. The groups of secondary nozzles 8 are connected to a secondary tank 23 via the respective secondary valves 22. The secondary tank 23 is connected to a regulator 24. The regulator 24 regulates the pressure of the air compressed by the air compressor (which is not shown). The secondary tank 23 stores the compressed air, the pressure of which is regulated by the 9 regulator 24. The compressed air stored in the secondary tank 23 is distributed | and is routed to each group of secondary nozzles 8 through the | 5 associated secondary valves 22. Each group of secondary nozzles 8 projects or stops air depending on the open-closed state of the associated secondary valve 22. Specifically, each group of secondary nozzles 8 projects air when the associated secondary valve 22 is opened and stops the projection of air when 9 the associated secondary valve 22 is closed. # A weft yarn feeler 10 is configured to act as a second 9 detection sensor.
    The second detection sensor detects the arrival time corresponding to a target position when the weft thread which is inserted by the air projected from the weft thread insertion nozzle arrives at the target position.
    The weft yarn feeler 10 detects whether or not the weft yarn 11 arrives at the predetermined target position, while the weft yarn 11 is inserted through Air projected from the tandem nozzle 6. , of the main nozzle 7 and said several sub-nozzles 8. The target position is set at one end of the weft thread insertion passage on the side furthest from the main nozzle 7 in the longitudinal direction of the ros 9 at a position which is appropriate for the weaving width of the fabric.
    The weft yarn feeler 10 can use an optical sensor, for example.
    The weft yarn feeler 10 emits a detection signal when the forward end of the weft yarn 11 during its transport by the air projected from the tandem nozzle 6, the main nozzle 7 and the secondary nozzles 8 arrives at the target position.
    In other words, the arrival time corresponding to a target position is a time at which the weft yarn feeler 10 outputs the detection signal.
    The control device 31 controls the operation of the apparatus | weft thread insertion 1. The control device 31 includes, for example | a central processing unit, a read-only memory (ROM) and a # random access memory (RAM). The controller 31, as shown in Fig. 2, includes a nozzle controller 311, a unit | acting as a memory 312 and a selection unit 313. The nozzle control unit 311 controls the air projected from the tandem nozzle 6 through the opening and closing of the tandem valve 14. The nozzle control unit 9 311 controls the air projected from the main nozzle 7 through the opening and closing of the main valve 12. The nozzle control unit 9 311 which makes office control unit controls the air # projected from said several secondary nozzles 8 through the opening and closing of said several secondary valves 22, 9 the memory unit 312 registers a certain number of models for reducing the volume of the air jet, which are prepared in advance and which are used for reducing the volume of the air jet from said several secondary nozzles 8. Said several models for reducing the volume of the air jet air jet that are registered in the ISP unit Its memory office 312 includes, for example, a model of reducing the volume of the air jet 0, a model of reducing the volume of the air jet 1, a model of reducing the volume of the air jet 2, a model of reduction of the volume of the air jet 3,… a model of reduction of the volume of the air jet m-1, and a model of reduction of the volume of the air jet m, as shown in figure 3. The model air jet volume reduction 0 represents a default model for air jet volume reduction from secondary nozzles 8. The rest of the models, ie volume reduction model from air jet 1 to air jet volume reduction model m, represent models that can be selected for air jet volume reduction from secondary nozzles 8.
    The volume of the air jet from said several secondary nozzles 8 can be reduced by reducing the opening times of the | secondary valves 22 which are associated with groups of secondary nozzles 8 # respectively, while the respective secondary valves 22 are open # 5 and closed. The opening time of the secondary valve 22 represents a period extending from a time when the secondary valve 22 is open to a time when the secondary valve 22 is closed. The volume of the air jet 9 from each group of the secondary nozzles 8 can be reduced by modifying at least one of the times given below: 9 10 the moment corresponding to the opening of the valve. associated secondary valve 22 and the 9 moment corresponding to the closing of the associated secondary valve 22. In order to be able to reduce the volume of the air jet from the secondary nozzles 8, a reduction in the opening times of only a certain number of the valves secondary 22 is satisfactory, and not necessarily all of the secondary valves 22.
    When a comparison of the air jet volume reduction among the air jet volume reduction models from the air jet volume reduction model 0 to the air jet reduction model is made air jet volume m, as shown in figure 3, the reduction in air jet volume of the air jet volume reduction model 1 is greater than that of the jet volume reduction model d air 0 and the reduction of the air jet volume of the air jet volume reduction model 2 is greater than that of the air jet volume reduction model 1. The air jet volume reduction air in the air jet volume reduction model m is greater than that in the air jet volume reduction model m-1. In other words, the air jet volume reduction model O represents the smallest reduction in air jet volume, while the air jet volume reduction model m has the most reduction. high with respect to the volume of the air jet, i.e. the reduction in the volume
    {air jet increases gradually from the reduction model of: air jet volume 0 to the air jet volume reduction model m. 9 Selection unit 313 selects one of the air jet volume reduction models {from air jet volume reduction model 0 to model | 5 reduction of the volume of the air jet m as described above. A selection of the air jet volume reduction model 9 through Selection Unit 313 can be implemented with operator intervention or without operator intervention. For selection with operator intervention, the function panel display 32 displays choices which can be selected for the air jet volume reduction models from the volume reduction model. from the air jet 1 to the air jet volume reduction model m, and the operator makes a selection to designate one of the air jet volume reduction models from the choices displayed by pressing one key or via a touch operation. Selection in the absence of operator intervention can be implemented based on the model which has the smallest reduction in air jet volume among the choices that can be selected for air jet volume reduction models from air jet volume reduction model 1 to air jet volume reduction model m. In the present embodiment, the selection unit 313 selects the air jet volume reduction model in the absence of operator intervention.
    The function board 32 is connected to the input-output controller 31 which inputs and outputs various data required for the insertion of the weft yarn to and from the controller 31. The function board 32 includes a display device and an input device. The display device displays a setting screen which is used for the implementation of the weft thread 11 insertion. The data to be entered through the function table 32 includes at least one type. weft thread 11 which is used for the insertion of the weft thread. The type of weft yarn 11 can be specified by the material or by the weft yarn title 11. The weft yarn type 11 is entered by an operator in the setting screen displayed on the | display device. # A method of controlling a € 5 air jet type loom in accordance with the embodiment of the present disclosure will now be described. Fig. 4 is a flowchart showing an example of a process for adjusting the air jet volume reduction pattern for the weft inserting apparatus of the type loom. The process # 10 shown in this flowchart is carried out by the controller 31 which has the configuration as shown in Figure 2. The nozzle controller 311 sets a variable / (step 51) to 1, the selection unit 313 selects a model of reduction in the volume of the air jet / which can be applied to the variable í, from among the models from the reduction model from the air jet volume O to the air jet volume reduction model m which are stored in the memory unit 312 (step S2). At this point, the variable / is set to 1, and selection unit 313 therefore selects the air jet volume reduction model 1.
    The nozzle control unit 311 controls the air projected from said plural secondary nozzles 8 based on the air jet volume reduction model / which was selected in the previous step S2 (step 53} for carrying out a test weaving. During test weaving, the nozzle control unit 311 individually controls the jet from the tandem nozzle 6 and from the main nozzle 7, and not only from the secondary nozzles 8, for the insertion of a weft thread, more precisely weft thread 11. For the weaving carried out on a trial basis, in which based on the selected air jet volume reduction model, a number of picks are taken into account for a single test weave.
    The number of picks is set for the single weave made in Test 9 in a range between hundreds of picks and several thousand picks, for example
    9 5 example. 9 In carrying out the test weaving, the weft yarn physical property detection sensor 3 detects the weft yarn mass as a physical property value of the weft yarn. weft which is to be inserted through the air 9 projected from the tandem nozzle 6 and from the main nozzle # 10 7, and reports the result of the detection to the controller 31. 9 The Weft yarn 10 detects the arrival time Tw corresponding to a target position and reports the result of the detection to the controller 31. The arrival time Tw corresponding to a target position represents a time when the weft yarn which has been inserted during the weaving carried out on a trial basis arrives at the target position.
    The nozzle control unit 311 specifies the mass of the weft yarn based on the detection results obtained during the single weaving made as a test from the detection sensor 3 of a physical property of the weft yarn (step S4). The nozzle control unit 311 specifies the mass of the weft yarn, for example, by sequentially adding the weft yarn mass values that are detected through the detection sensor 3 of a property physics of the weft yarn for each pick during the single test weave and dividing the added values by the number of picks corresponding to the test weave.
    The nozzle control unit 311 specifies the arrival moment Tw corresponding to a target position based on the detection results obtained during the single test weaving from the probe. of weft thread 10 (step 55). The nozzle control unit 311 specifies the arrival moment Tw corresponding to a target position, for example, by sequentially summing the deviation values of the arrival moment Tw corresponding to a target position.
    | 17 target position of the weft yarn that has been detected by the weft feeler 10 relative to the reference arrival time for each pick during the | single weave performed on a trial basis, and dividing the added values by the | number of picks corresponding to the weaving carried out as a test.
    Note that any of steps 54 and S5 may be performed first.
    The {methods of specifying the mass of the weft yarn and the moment of arrival Tw | corresponding to a target position are not limited to the examples that we have | described above; other processes can be implemented. 9 The nozzle control unit 311 checks whether or not the mass of the weft yarn as specified in step 54 falls within a predetermined range (step S6) or 9. The predetermined range represents # a predetermined numerical range that is defined with a reference value 9 of the mass of the weft thread established at the center.
    When the specified mass of the weft yarn is outside the predetermined range, processing returns to step S3 from step S6 and the trial weaving is restarted.
    In this way, the weaving carried out as a test is repeated until the mass of the weft yarn as specified in step 54 falls within the predetermined range.
    When the specified mass of the weft thread falls within the predetermined range, the nozzle control unit 311 checks whether the arrival time Tw corresponding to a target position, as specified in step 55, yes or no return to a predetermined admissible range (step 57). The allowable range represents a predetermined time that is defined with a target value of the arrival time corresponding to a target position, set in the center.
    When the arrival time Tw corresponding to a target position falls within the predetermined allowable range, the nozzle control unit 311 determines that the detection result is Yes in step S7, that is, the The air jet volume reduction model selected in step S2 described above is appropriate.
    In this case, processing proceeds to step S8 from step 57. In step 58, the value # of the variable / is incremented by 1. With the increment, the variable / takes the | value 2. When the process returns to step S2 from step 58, the selection unit 313 selects the model for reducing the volume of the air jet 2. At {5 each time the value of variable / is incremented in step {S8, the air jet volume reduction model which has been selected through selection unit 313 in step 52 is changed to move to # model which has a higher reduction in the volume of the jet
    # of air. # 10 When the specified arrival time Tw corresponding to a target position 9 is outside the allowable range, the nozzle control unit 311 determines that the detection result is No in step 57, That is, the model of reducing the volume of the air jet which was selected in step S2 described above is inappropriate.
    In this case, the processing goes from step S7 to step S9. In step 59, the nozzle control unit 311 sets the final model of the reduction in the volume of the air jet of the secondary nozzles based on the value of the variable / at this time.
    For example, when the value of the variable / is equal to 4 at the time when the nozzle control unit 311 determines that the result of the detection is No in step 57, the nozzle control unit 311 sets, either the air jet volume reduction model 3 or the air jet volume reduction model 2 for the final secondary nozzle air jet volume reduction model among the volume reduction models of the air jet which have been determined to be appropriate up to the moment when the value of the variable / is equal to 4 {/ = 4), i.e. from the model of reduction of the volume of the jet air jet 1 up to air jet volume reduction model 3. Air jet volume reduction model 3 and air jet volume reduction model 2 have lower reduction than of the air jet volume reduction model 4. The final air jet volume reduction model of the nozzles
    | secondary represents a model that must be applied to the operation itself after the implementation of the weaving carried out on a trial basis. In order to be able to establish the air jet volume reduction model for the secondary nozzles in accordance with the embodiment of the present disclosure, it is determined whether the air jet volume reduction model is air is appropriate or not taking into account the value of a physical property of the weft yarn which has been detected by the detection sensor 3 of a physical property of the weft yarn, in addition to the time of arrival corresponding to a target position which has been detected by the weft yarn feeler 10. Accordingly, it is more adequately determined whether the air jet volume reduction model for the reduction of the air jet is more adequately determined. volume of the air jet from the secondary nozzles is appropriate or not.
    When the physical property value of the weft yarn which has been specified by the nozzle control unit 311 is outside the predetermined range, the nozzle control unit 311 instructs the type loom. to repeat the weaving carried out on a trial basis until the physical property value of the weft yarn is within the predetermined range.
    In this way, it is determined whether the air jet volume reduction model is suitable or not under conditions such that the physical property value of the weft yarn falls within the predetermined range.
    The advantages obtained with the embodiment of the present disclosure will now be described on the basis of specific examples.
    Fig. 5 is a flowchart showing a relationship between the arrival moment corresponding to a target position of the weft yarn and the mass of the weft yarn.
    The vertical axis represents the arrival moment Tw corresponding to a target position and the horizontal axis represents the mass of the weft yarn.
    ; With respect to the predetermined allowable range, the arrival moment Tw î corresponding to a target position is further delayed as the mass of the weft yarn increases, but the arrival moment Tw corresponding to a target position {is advanced further when the weight of the weft yarn increases. the mass of the weft thread decreases, as is | 5 is shown in FIG. 5. When the reference value of the mass of the weft thread 9 designated by the letters gm, a predetermined range E of the mass 9 of the weft thread is determined, the reference value gm being placed in the center. We specify a # mass gl of the weft yarn based on the detection result 9 obtained at time 11 from the detection sensor 3 of a physical property # 10 of the weft yarn. Weft yarn mass g2 is specified based on the detection result 9 obtained at time t2 from the detection sensor 3 of a physical property of the weft yarn. The moment t2 represents a moment which is later than the moment t1. Weft yarn mass g3 is specified based on the detection result obtained at time t3 from the detection sensor 3 of a physical property of the weft yarn. The moment t3 represents a moment which is later than the moment t2. The mass g1 represents the same value as the reference value gm. The mass g2 represents a value which is located outside the predetermined range E and which is less than the reference value gm. The mass g3 represents a value which is located outside the predetermined range E, which is less than the reference value gm and which is greater than the mass g2. In this case, the mass of the weft thread decreases progressively during the time which elapses between the moment t1 and the moment t2, then is reversed at the moment t2 from the decreasing trend and in the direction of the tendency which increases, and then increases in a progressive manner during the time which elapses between the moment t2 and the moment t3.
    In FIG. 6, there is shown a flowchart in which is explained a relation existing between the moment of arrival of the weft thread corresponding to a target position and the reduction in the volume of the air jet from the secondary nozzles during the weaving carried out. on a trial basis to establish the air jet volume reduction model for the secondary nozzles. The vertical axis represents the arrival moment Tw corresponding to a target position. The horizontal axis | represents the time corresponding to the number of picks, and the reduction in the volume of the air jet from the secondary nozzles increases gradually over time. The graphs of the two cases are shown in FIG. 6. In the first case, the weight of the weft thread does not vary, whatever the 3 time lapse considered. A curve A represents the change in arrival time Tw corresponding to a target position in the first case. In the second case, the mass of the weft thread varies over time. A curve B represents the 9 10 change in the arrival moment Tw corresponding to a target position in the second case.
    9 In the first case in which the mass of the weft thread does not vary regardless of the period of time considered as shown with curve A in FIG. 6, the moment of arrival Tw corresponding to a target position varies greatly up to that a period of time Ts has elapsed, while the reduction in the volume of the air jet from the secondary nozzles increases as time passes. However, after the time period Ts has elapsed, the arrival time Tw corresponding to a target position is further delayed from the predetermined allowable range when the reduction in the volume of the air jet from the nozzles secondary increases. The reason is that the arrival moment Tw corresponding to a target position is essentially constant when the volume of the air jet from the secondary nozzles 8 is fixed at a suitable value at most, but the arrival moment Tw corresponding to a target position is delayed when the volume of the air jet from the secondary nozzles 8 falls outside the appropriate volume due to insufficient volume of the air jet. In this case, all of the air jet volume reduction patterns that were selected during the trial weaving are determined to be appropriate until the time period Ts has elapsed. In such a case, the models established to apply to the operation itself after the weaving carried out on a trial basis represent one model among the models of reduction of the volume of the air jet in which the volume of reduction of the air jet air jet is obtained before the delay in the arrival time Tw corresponding to a target position. 9 When the weight of the weft thread varies over time as is | 5 shows in Figure 5, the arrival moment Tw corresponding to a target position | varies as shown with curve B in Figure 6. In this case, although the mass of the weft thread decreases from mass gl to mass g2 during | of the time lapse between time t1 and time t2, as shown in FIG. 5, the time of arrival Tw corresponding to a target position 9 10 hardly varies during the time that s 'elapses between time t1 and 9 time t2, as shown with curve B in figure 6. This means that, 9 during the time lapse between time t1 and time t2, the value of advance with respect to the arrival time corresponding to a target position correspondingly to the decrease in weft yarn mass is offset correspondingly to the delay value with respect to the timing of 'arrival corresponding to a target position corresponding to the increase in the reduction in the volume of the air jet from the secondary nozzles.
    On the other hand, at time t2 as shown in Figure 6, the arrival time Tw corresponding to a target position displays a significant change from the delay tendency before easing in the direction of a gradual change in what relates to the retardation trend up to time 13. The reason is that at time t2 as shown in FIG. 5, the mass of the weft thread reverses the trend from a decrease to an increase and then maintains the trend 'gradual increase until time t3. Whether the air jet volume reduction model is appropriate or not is determined based only on the arrival time Tw corresponding to a target position in such a situation, since all models of reduction in the volume of the air jet which are | selected during the weaving carried out as a test in the period of time between time t1 and time t2 as shown in Fig. 6 are determined to be appropriate. In this case, the model chosen to be # applied to the operation itself after the weaving carried out as a trial 9 5 represents a model among the models of reduction of the volume of the air jet in which the reduction volume air jet is obtained at time 12 or a little earlier. However, when the model of reducing the volume of the air jet established in this way and applied to the actual operation of the air jet type loom 9 and when the air jet type loom 9 is activated, the arrival time 9 10 corresponding to a target position is delayed since the reduction in 9 the volume of the air jet is excessive due to the difference between the 9 physical property value of the wire weft yarn used in the test weaving and the physical property value of the weft yarn used in the actual operation, which increases the risk of a noticeable failure at the insertion of the weft thread.
    In order to solve this problem according to the embodiment of the present disclosure, it is determined whether or not the air jet volume reduction model is suitable, taking into account the physical property value of the yarn. weft which is specified on the basis of the detection results of the detection sensor 3 of a physical property of the weft yarn which is obtained during the test weaving, in addition to the moment of arrival Tw corresponding to a target position. Accordingly, even when the mass of the weft yarn varies even up to outside the predetermined range E, as shown in Fig. 5, and when the arrival time Tw corresponding to a target position varies, as is shown in Fig. 5. represents it with the curve B in figure 6, the model of reduction of the volume of the air jet which has been selected during the period of time which elapses between the moment t1 and the moment t2 during the weaving carried out as d The test cannot be determined to be appropriate. Furthermore, when the mass of the weft yarn falls within the predetermined range E and when the moment of arrival Tw corresponding to a target position falls within the admissible range during the period of time which elapses between the moment t1 and the moment t2 as shown in figure 6, all the models of reduction of the volume of the air jet which | were selected during the weaving carried out as a test during the period of | 5 times which elapse between time t1 and time 12 are determined as | being appropriate. Accordingly, according to the present embodiment, whether the model of reducing the volume of the air jet for reducing the volume of the air jet from the secondary nozzles is appropriate or not is appropriate. more adequately determined. In this way, the model of reduction of the volume of the air jet which is to be applied to the operation itself after the weaving carried out on a trial basis is established more adequately.
    The technical scope of the present disclosure is not limited to the embodiment which has been described above. It is intended to encompass various modifications, as well as various improvements and combinations of the components of the disclosure, so far as these are equivalent in substance when taking into account the scope of the claims.
    By way of example, in the embodiment described above, the detection sensor 3 of a physical property of the weft yarn detects the mass of the weft yarn as an example of the value a physical property of the weft yarn 11. However, the scope of the present disclosure is not limited to the embodiment which has been described above. The weft yarn physical property detection sensor 3 can be configured to detect lint on the weft yarn or the weft yarn diameter, as the physical property value of the weft yarn 11, at the same time. instead of the mass of the weft thread. The weft yarn physical property detection sensor 3 can be configured to detect other weft yarn physical property values that may affect the arrival time corresponding to a target position, if at all. There is, in addition to the mass of the weft thread, lint on the weft thread and the diameter of the weft thread. The physical property value of the weft yarn 11 to be used in determining whether the air jet volume reduction model is suitable or not is not limited to a single value. The weft yarn physical property detection sensor 39 can be configured to detect multiple values of physical properties to determine whether or not each of the 9 physical property values is within the predetermined range or not. Said several values of physical properties may represent two values of physical properties, including the mass of the weft yarn and the lint on the weft yarn or the lint on the weft yarn and the diameter of the weft yarn, or said several values of physical properties may represent three values of physical properties, including the mass of the weft yarn, the lint on the weft yarn and the diameter of the weft yarn.
    When selecting the models one by one from said plural air jet volume reduction models which are stored in the memory in the memory unit 312, an example of selecting in order from the The model which has the smallest reduction in the volume of the air jet is described in the present embodiment. However, the order of selecting an air jet volume reduction model can be changed to any order when determining whether the air jet volume reduction model is appropriate or not. In the test weaving, based on the air jet volume reduction model, all of the prepared models can be used. The upper limit can be set to correspond to the number of repetitions of the test weaving that must be performed until the physical property value of the weft yarn falls within the predetermined range.
    权利要求:
    Claims (3)
    [1]
    CLAIMS | 1. Air jet type loom, comprising: 9 a weft thread inserting nozzle (6, 7) for inserting a weft thread | 5 {11}; | a number of secondary nozzles (8) arranged downstream of the nozzle | Weft Thread Insertion (6, 7) in a Weft Thread Transport Direction | (11); : a control unit (311) which controls the air projected from said # 10 several secondary nozzles (8); a first detection sensor (3) which detects a physical property value of the weft thread (11) inserted by the projected from the weft thread inserting nozzle (6, 7); a second detecting sensor (10) which detects an arrival time (Tw) corresponding to a target position, at which the weft thread (11) inserted by Fair projected from the weft thread insertion nozzle (6 , 7) arrives at a target position; a memory unit (312) which stores a number of air jet volume reduction patterns which are prepared in advance and which are used for reducing the volume of air projected from said plural nozzles secondary (8); and a selection unit (313) which selects a model from among said plural models of reducing the volume of the air jet, characterized in that the control unit (311) controls the air projected from said plural secondary nozzles (8) based on the model, among said plural models of reducing the volume of the air jet, which is selected by the selection unit (313) for a test weaving to be carried out, specifies the value of physical property of the weft yarn (11) and the time of arrival | {Tw} corresponding to a target position of the weft yarn (11} based on the # detection results obtained during the weaving carried out as a test from [5 from the first detection sensor {3} and the second detection sensor | (10), respectively, and determines that the selected air jet volume reduction model 9 is appropriate when the specified value of physical property 9 of the weft yarn (11) fits. within a predetermined range (E} and when the specified arrival time (Tw) corresponding to a target position falls within a predetermined admissible range € 10.
    [2]
    The air jet type loom according to claim 1, characterized in that: when the specified value of physical property of the weft yarn (11) is outside the predetermined range (E), the control unit (311) instructs the air jet type loom to repeat the test weaving until the physical property value of the weft yarn (11) enters the predetermined range (E).
    [3]
    3. A method of controlling an air jet type loom, the air jet type loom comprising a weft thread inserting nozzle (6, 7) for inserting the weft. 'a weft thread (11), a number of secondary nozzles (8) arranged downstream of the weft thread insertion nozzle (6, 7} in a direction of transport of the weft thread (11), a first detection sensor (3) which detects a physical property value of the weft yarn (11) inserted by air projected from the weft insertion nozzle (6, 7), and a second sensor detection sensor (10) which detects an arrival time (Tw) corresponding to a target position, at which the weft thread (11) inserted by the air projected from the weft thread insertion nozzle (6 , 7) arrives at a target position, the method of controlling the air jet type loom comprising:
    selecting a model from among said several models of reducing the volume of the air jet which are prepared in advance and used for the reduction in the volume of the air projected from said several secondary nozzles (8); | to carry out a weaving carried out as a test by means of one to 5 control of the air projected from said several secondary nozzles (8) in se | based on the model selected from said plural models of reducing the volume of the air jet; | specify the physical property value of the weft thread (11) and the time | arrival (Tw) corresponding to a target position of the weft thread (11) based on: 10 the results of the detection obtained during the weaving carried out as a test 9 from the first sensor sensor (3) and the second sensor of | detection (10), respectively; and | determine that the selected air jet volume reduction model is appropriate when the specified value of physical property of the weft yarn (11) falls within a predetermined range (E) and when the specified time of arrival (Tw} corresponding at a target position falls within a predetermined allowable range.
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    同族专利:
    公开号 | 公开日
    JP2020169405A|2020-10-15|
    BE1027122A9|2021-03-23|
    CN111793879A|2020-10-20|
    BE1027122B1|2021-03-09|
    BE1027122A1|2020-10-09|
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    法律状态:
    2021-04-28| FG| Patent granted|Effective date: 20210309 |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2019070444A|JP2020169405A|2019-04-02|2019-04-02|Air-jet machine and method for controlling air-jet machine|
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