Information display device for air-jet looms

Abstract

Provided is an information display device for an air jet loom that can easily set an action type that makes the impact on a weft thread due to weft thread stoppage by a weft thread stopper smaller without changing the weft insertion start timing. A type setting storage section (111) of the information display device (100) stores action types that respectively set actions of sub-valves connected to a plurality of sub-nozzles for each sub-valve pair, and acquires a final arrival time and an intermediate arrival time for each of the stored plurality of action types. Further, the type setting storage section (111) stores a difference between the final arrival time and the intermediate arrival time, i.e., a time difference, in association with each action type. A type extraction section (121) extracts an action type for which the time difference associated in the plurality of action types stored in the type setting storage section (111) is the largest. A display device (202) displays the action type extracted by the type extraction section (121).

Description

Technical Field

[0001] This invention relates to an information display device for air-jet looms. Background Technology

[0002] In an air-jet loom, compressed air is injected from the main nozzle and auxiliary nozzle, causing the weft yarn to travel through the reed's internal passage. At the end of the weft insertion process, the air-jet loom stops the weft yarn at the weft yarn stop pin, thus ending the weft insertion. When the weft yarn stop pin stops the weft yarn, there is an impact on the weft yarn.

[0003] For example, Patent Document 1 discloses a jet chamber that mitigates the impact on the weft yarn when the weft yarn catcher stops at the weft yarn. The jet chamber disclosed in Patent Document 1 includes multiple photoelectric sensors that sense the weft yarn. These multiple photoelectric sensors are spaced apart in the weft yarn's travel direction. Furthermore, the multiple photoelectric sensors are positioned on the opposite side of the yarn feeding side to sense when the weft yarn catcher stops at the weft yarn immediately preceding it during the weft insertion termination period.

[0004] Furthermore, in the injection chamber disclosed in Patent Document 1, the weft yarn's travel speed is calculated based on the difference in detection time points of multiple photoelectric sensors. Moreover, when the calculated travel speed is faster, control is applied to delay the weft insertion start time. As a result, the time from when the braking device actuates until the weft yarn is caught on the stop pin is longer, thus the weft yarn is subjected to braking force for a correspondingly longer period, thereby reducing the impact on the weft yarn. Conversely, when the calculated travel speed is slower, control is applied to advance the weft insertion start time, in the opposite manner.

[0005] Patent Document 1: Japanese Patent Application Publication No. 7-26443

[0006] However, if the start time of weft insertion is delayed, the arrival time of the weft yarn end at the final position is delayed, thus raising concerns about the possibility of weft insertion errors. Conversely, if the start time of weft insertion is advanced, the concern about the inserted weft yarn coming into contact with the warp yarn on the reed's inner passage entrance side increases. Summary of the Invention

[0007] The main idea of ​​the information display device for an air-jet loom designed to solve the aforementioned problems is that the air-jet loom includes: a weft insertion device that unwinds the weft yarn wound on a storage cylinder by retracting a weft yarn catch pin, and guides the unwound weft yarn through the reed's internal passage and to the warp opening via a main nozzle and multiple auxiliary nozzles; a first weft yarn detection unit that outputs the final arrival time of the end of the inserted weft yarn reaching its final arrival position; and a second weft yarn detection unit that outputs the intermediate arrival time of the end of the inserted weft yarn reaching a predetermined position upstream in the weft insertion direction from the final arrival position. In the information display device for the air-jet loom... The device comprises: a type setting storage unit that stores the operation type set for the operation of the auxiliary valve that injects compressed air from the auxiliary nozzle according to each of the plurality of auxiliary valves, and obtains the final arrival time and the intermediate arrival time for each of the plurality of stored operation types, and stores the time difference between the final arrival time and the intermediate arrival time in association for each of the operation types; a type extraction unit that extracts the operation type with the largest time difference among the plurality of operation types stored in the type setting storage unit; and a display device that displays the operation type extracted by the type extraction unit.

[0008] Accordingly, the type setting storage unit actually acquires the final arrival time and intermediate arrival time for each action type, calculates the time difference based on the acquired final arrival time and intermediate arrival time, and stores this time difference in association with the action type. Furthermore, the type extraction unit extracts the action type that maximizes the time difference between the final arrival time and the intermediate arrival time based on the actually acquired values. The larger the time difference between the final arrival time and the intermediate arrival time, the smaller the impact on the weft yarn when the weft yarn catcher stops at the weft yarn. Therefore, if multiple sub-valvees are operated separately based on the action type with the largest extracted time difference between the final arrival time and the intermediate arrival time, the impact on the weft yarn catcher when it stops at the weft yarn can be minimized. Moreover, instead of changing the weft insertion start time as in the prior art, the action type with the largest associated time difference is extracted from multiple action types for which the operation of the sub-valve that injects compressed air from the sub-nozzle is set according to the operation of each of the multiple sub-valvees. Therefore, it is possible to easily set an action type that reduces the impact on the weft yarn when the weft yarn stopper is engaged, without delaying or advancing the start of the weft insertion.

[0009] Alternatively, for the information display device of the air-jet loom, the second weft yarn detection unit is positioned in the width of the fabric, facing the reed passage.

[0010] Therefore, compared with the case where the second weft yarn detection unit is located outside the textile width of the reed inner passage, the distance between the first and second weft yarn detection units can be increased, thus making the correlation between the magnitude of the impact and the time difference more accurate.

[0011] Alternatively, for the information display device of the air-jet loom, the second weft detection unit is a loop sensor that detects the weft yarn unwound from the storage cylinder.

[0012] Therefore, the intermediate arrival time can be obtained using the air ring sensor required for the weft yarn to pass through, thus enabling the intermediate arrival time to be obtained without increasing the number of parts.

[0013] Alternatively, for the information display device of the jet loom, the type extraction unit extracts the action type with the largest time difference among the multiple action types stored in the type setting storage unit, where the final arrival time is below a predetermined value and an association is established.

[0014] Accordingly, it is possible to easily set an action type that ensures the final arrival time is below a predetermined value while maintaining the weft yarn conveying efficiency and reducing the impact on the weft yarn.

[0015] Alternatively, the information display device for the air-jet loom may include a mode selection unit, which extracts the conditions of the action type with the largest time difference and displays them on the display device in a selectable manner.

[0016] Therefore, it becomes easier to extract motion types that reduce the impact on the weft yarn.

[0017] The present invention can easily set an action type that reduces the impact on the weft yarn when the weft yarn catches the weft yarn based on the weft yarn catch pin without changing the weft insertion start time. Attached Figure Description

[0018] Figure 1 This is a schematic diagram showing the weft insertion device of an air-jet loom.

[0019] Figure 2 This is a schematic three-dimensional diagram showing the weft insertion device of an air-jet loom.

[0020] Figure 3 This is a block diagram representing an information display device.

[0021] Figure 4 It is a diagram that schematically represents the type of action.

[0022] Figure 5 This is a diagram schematically representing a display device that shows three conditions.

[0023] Figure 6 This is a schematic diagram illustrating a display device that shows two modes.

[0024] Figure 7 This is a diagram schematically representing a display device that shows the extracted action type.

[0025] Explanation of reference numerals in the attached figures

[0026] ΔT...time difference; T...warp yarn; Ti...intermediate arrival time; Tw...final arrival time; Y...weft yarn; 10...weft insertion device; 14...reed; 14a...reed internal passage; 15...secondary nozzle; 17...storage cylinder; 18...weft yarn catch pin; 19...air ring sensor; 22...main nozzle; 32...secondary valve; 40...first weft yarn detection unit; 41...secondary weft yarn detection unit; 100...information display device; 111...type setting storage unit; 121...type extraction unit; 131...mode selection unit; 202...display device. Detailed Implementation

[0027] The following is based on Figures 1 to 7 One embodiment of an information display device for an air-jet loom will be described. Furthermore, in the following description, the direction in which the weft yarn is inserted into the warp opening and passes through will be referred to as the weft insertion direction.

[0028] <Air-jet loom>

[0029] like Figure 1 As shown, the air-jet loom includes a weft insertion device 10, a first weft yarn detection unit 40, and a second weft yarn detection unit 41. Furthermore, as... Figure 3 As shown, the air-jet loom is equipped with an information display device 100.

[0030] <Weft insertion device>

[0031] like Figure 1 As shown, the weft insertion device 10 includes a weft insertion nozzle 11, a yarn feeding section 12, a weft yarn length measuring and storage device 13, a reed 14, multiple auxiliary nozzles 15, a brake 23, and a control device 16.

[0032] The yarn feeding section 12 is located upstream of the weft insertion nozzle 11 in the weft insertion direction X. The weft yarn Y of the yarn feeding section 12 is drawn out by the rotation of the winding arm (not shown) of the weft yarn length measuring and storage device 13, and is stored in a state of being wound around the storage cylinder 17.

[0033] The weft yarn length measuring and storage device 13 includes a weft yarn catch pin 18 and an air ring sensor 19 for detecting the unwinding of the weft yarn Y from the storage cylinder 17. The weft yarn catch pin 18 and the air ring sensor 19 are disposed around the storage cylinder 17. The weft yarn catch pin 18 is electrically connected to the control device 16. At a preset loom rotation angle, the weft yarn catch pin 18 retracts, causing the weft yarn Y stored in the storage cylinder 17 to unwind. The moment when the weft yarn catch pin 18 unwinds the weft yarn Y is the start moment of weft insertion.

[0034] The air ring sensor 19 detects the weft yarn Y unwound from the storage cylinder 17 during weft insertion. The air ring sensor 19 outputs a weft unwinding signal to the control device 16. If a preset number of n weft unwinding signals is input, the control device 16 restores the weft yarn catch pin 18 to its position before unwinding.

[0035] If the weft yarn stop pin 18 is returned to its position before unwinding, the weft yarn stop pin 18 will stop the weft yarn Y unwinding from the storage tube 17, thus ending the weft insertion. In addition, the moment when the weft yarn stop pin 18 stops at the weft yarn Y is set according to the number of winding turns required to store the weft yarn Y, which is equivalent to the length of the textile width TL, in the storage tube 17.

[0036] The brake 23 is positioned downstream of the storage cylinder 17 in the weft insertion direction X. The brake 23 brakes the traveling weft yarn Y before the weft insertion is completed. The brake 23 brakes the traveling weft yarn Y at high speed, thus reducing its travel speed. Consequently, the travel speed of the weft yarn Y is reduced before the weft yarn catch pin 18 engages with it. As a result, when the end of the weft yarn Y reaches its final position as the weft insertion end, the impact acting on the weft yarn Y is reduced when the weft yarn catch pin 18 engages with it. In this embodiment, in addition to the braking of the weft yarn Y by the brake 23, the impact when the weft yarn catch pin 18 engages with the weft yarn Y is reduced by controlling the travel speed of the weft yarn Y.

[0037] The weft insertion nozzle 11 includes: a tandem nozzle 21 that leads out the weft yarn Y from the storage cylinder 17; and a main nozzle 22 for weft insertion that leads the weft yarn Y into the reed passage 14a of the reed 14. The main nozzle 22 is connected to a main valve 22v via a pipe 22a. The main valve 22v is connected to a main air tank 26 via a pipe 22b. The tandem nozzle 21 is connected to a tandem valve 21v via a pipe 21a. The tandem valve 21v is connected to the main air tank 26, which is shared with the main valve 22v, via a pipe 21b. Alternatively, the tandem valve 21v may be connected to an air tank different from the main air tank 26. The main air tank 26 is connected to a shared air compressor 31 installed in the textile factory. Compressed air supplied from the air compressor 31 is stored in the main air tank 26.

[0038] As an example, the multiple auxiliary nozzles 15 are divided into 6 groups, each group having 4 auxiliary nozzles 15. A secondary valve 32 is connected to each group of 4 auxiliary nozzles 15. Therefore, the weft insertion device 10 has 6 secondary valves 32. Each auxiliary nozzle 15 in each group is connected to its respective secondary valve 32 via a pipe 33. Each secondary valve 32 is connected to a common auxiliary air tank 34.

[0039] The main valve 22v, the tandem valve 21v, and the auxiliary valve 32 are electrically connected to the control device 16. Furthermore, in the air-jet loom, air is ejected from the main nozzle 22 and auxiliary nozzle 15 according to the operation of the main valve 22v and auxiliary valve 32 controlled by the control device 16, and the weft yarn Y is introduced via the reed internal passage 14a. Therefore, the weft introduction device 10 causes the weft yarn Y to pass through the reed internal passage 14a of the reed 14 via the main nozzle 22 and multiple auxiliary nozzles 15, and introduces the weft yarn into the warp opening.

[0040] Specifically, during the insertion of weft yarn Y, control device 16 outputs work command signals to the main valve 22v and the tandem valve 21v. Furthermore, during the insertion of weft yarn Y, control device 16 outputs work command signals to the auxiliary valve 32. Thus, weft yarn Y begins to travel by receiving compressed air ejected from the main nozzle 22, and after the travel begins, it receives compressed air ejected from multiple auxiliary nozzles 15 and travels to its final destination position. Regarding the insertion of weft yarn Y, the operation types of the main valve 22v and auxiliary valve 32 are preset to achieve the desired travel speed. Since the operation of the main valve 22v is identical across multiple operation types, the operation type of the auxiliary valve 32 will be explained.

[0041] <Action Type>

[0042] like Figure 4 As shown, the action type of the main valve 22v and the auxiliary valve 32 is determined by the start opening time and the length of the opening time of the main valve 22v and the auxiliary valve 32. Figure 4 The horizontal axis of the coordinate graph represents the start time and duration of the opening of the main valve 22v and the auxiliary valve 32. Furthermore, the bottom horizontal bar represents the start time and duration of the opening of the main valve 22v, and all other horizontal bars represent the start time and duration of the opening of the auxiliary valve 32. In the following description, the duration of the opening of the main nozzle 22 and the auxiliary valve 32 will be recorded as [Opening Time].

[0043] also, Figure 4 The vertical axis of the coordinate graph represents the travel distance of the weft yarn Y from the upstream side to the downstream side of the weft insertion direction X. Furthermore, Figure 4 The single-dot dashed line represents the trajectory of the end of the weft yarn Y as it travels, i.e., the travel curve.

[0044] After the weft yarn Y begins to travel through the compressed air from the main nozzle 22, it travels through the compressed air ejected from the auxiliary nozzles 15 arranged along the weft insertion direction X. The greater the pressure and the longer the ejection time of the compressed air ejected from the main nozzle 22 and the auxiliary nozzles 15, the faster the average travel speed of the weft yarn Y.

[0045] The longer the opening time of the secondary valve 32, the more compressed air is ejected from the secondary nozzle 15 connected to the secondary valve 32. If the amount of compressed air ejected from the secondary nozzle 15 increases, the weft yarn Y's travel speed increases. Therefore, by setting various settings for the start-opening time and opening duration of the secondary valve 32, different action types that reduce the weft yarn Y's travel speed can be established. Furthermore, if the weft yarn Y's travel speed decreases when it is stuck at the weft yarn stop pin 18, the impact acting on the weft yarn Y decreases. Therefore, if the action type that reduces the weft yarn Y's travel speed when it is stuck at the weft yarn stop pin 18 is one of the multiple action types, the impact acting on the weft yarn Y can be reduced. Moreover, if multiple action types that reduce the weft yarn Y's travel speed are set and test weaving is performed with each action type, multiple action types that reduce the impact acting on the weft yarn Y can be extracted based on the test weaving results.

[0046] In addition, among the extracted action types, the opening time of the main valve 22V is made identical for all of them. Furthermore, among the extracted action types, it is set that the opening time of a specific auxiliary valve 32 is longer than that of other auxiliary valves 32, and the opening time of other auxiliary valves 32 is finely adjusted.

[0047] like Figure 2 As shown, the main nozzle 22, auxiliary nozzle 15, and reed 14 are mounted on the reed holder 24. The main nozzle 22, auxiliary nozzle 15, and reed 14 are integral with the reed holder 24 and reciprocate along the front-to-back direction of the air-jet loom. Each auxiliary nozzle 15 is fixed to the reed holder 24 via a support block 25. Each auxiliary nozzle 15 can move in and out from between the warp yarn rows relative to the warp opening as the reed holder 24 oscillates.

[0048] In addition, although not shown in the figure, the tandem nozzle 21, brake 23, weft yarn length measuring and storage device 13 and yarn feeding part 12 are fixed to a bracket installed on the frame or floor of the air-jet loom.

[0049] The reed 14 is composed of multiple reed teeth 14c arranged along the weft direction X, each having a guide recess 14b. The internal passage 14a of the reed is formed by the guide recesses 14b of the multiple reed teeth 14c.

[0050] <First Weft Yarn Inspection Department and Second Weft Yarn Inspection Department>

[0051] like Figure 1 and Figure 2As shown, the first weft yarn detection unit 40 is positioned opposite to the downstream side of the reed inner passage 14a in the weft insertion direction X. The first weft yarn detection unit 40 is located outside the textile width TL.

[0052] The first weft yarn detection unit 40 is configured such that, when the weft yarn Y is being normally inserted, the end position of the weft yarn Y, which corresponds to the weft yarn storage length of n turns of the storage cylinder 17, becomes the detection position of the first weft yarn detection unit 40. The first weft yarn detection unit 40 is electrically connected to the control device 16. If the first weft yarn detection unit 40 detects the end of the weft yarn Y, it outputs a weft yarn detection signal. This weft yarn detection signal is an arrival signal indicating that the weft yarn Y has reached its final arrival position. Based on the weft yarn detection signal output by the first weft yarn detection unit 40, the control device 16 identifies the final arrival time Tw, which indicates that the end of the weft yarn Y has reached the detection position of the first weft yarn detection unit 40. Therefore, the first weft yarn detection unit 40 outputs a weft yarn detection signal, which is used by the control device 16 to identify the final arrival time Tw, indicating that the end of the inserted weft yarn Y has reached its final arrival position.

[0053] The second weft detection unit 41 is a textile width sensor located upstream of the first weft detection unit 40 in the weft insertion direction X, within the textile width TL, facing the reed inner passage 14a. The second weft detection unit 41 is located at the center of the textile width TL, opposite to the main nozzle 22. The second weft detection unit 41 is configured such that, when the weft yarn Y is being normally inserted, the end position of the weft yarn Y, corresponding to the weft yarn storage length of (n-1) turns of the storage cylinder 17, becomes the detection position of the second weft detection unit 41. The second weft detection unit 41 is electrically connected to the control device 16. If the second weft detection unit 41 detects the end of the weft yarn Y, it outputs a weft detection signal. Based on the weft detection signal output by the second weft detection unit 41, the control device 16 identifies the intermediate arrival time Ti of the end of the weft yarn Y reaching the detection position of the second weft detection unit 41. Therefore, the second weft yarn detection unit 41 outputs a weft yarn detection signal, which is used by the control device 16 to identify the intermediate arrival time Ti when the end of the inserted weft yarn Y reaches a predetermined position upstream of the final arrival position in the weft insertion direction X.

[0054] like Figure 2 As shown, the first weft yarn detection unit 40 and the second weft yarn detection unit 41 are fixed to the reed seat 24 in an adjustable manner via the support block 43. The second weft yarn detection unit 41 is fixed to the reed seat 24 at a position that can detect the position of the weft yarn Y within a range unaffected by the jet pressure of the main nozzle 22.

[0055] As described above, the impact on weft yarn Y when the weft yarn stop pin 18 stops at weft yarn Y is such that the slower the weft yarn Y travels, the smaller the impact. The slower the weft yarn Y travels, the longer the time required to reach its final arrival time Tw from the intermediate arrival time Ti. Therefore, significantly slowing down weft yarn Y downstream of the weft insertion direction X, in other words, the larger the time difference ΔT becomes, the smaller the impact on weft yarn Y when the weft yarn stop pin 18 stops at weft yarn Y.

[0056] Therefore, as Figure 4 As shown, among the action types, the action type that maximizes the time difference ΔT between the final arrival time Tw and the intermediate arrival time Ti is extracted from multiple action types. Thus, when the weft yarn stop pin 18 stops at the weft yarn Y, the impact acting on the weft yarn Y can be minimized.

[0057] <Information Display Device>

[0058] like Figure 3 As shown, the information display device 100 includes a type setting storage unit 111, a type retrieval unit 121, and a display device 202. Alternatively, the information display device 100 may include a mode selection unit 131. The type setting storage unit 111, the type retrieval unit 121, and the mode selection unit 131 are provided in the control device 16. The display device 202 is electrically connected to the control device 16. Alternatively, the information display device 100 may include an input device 201 electrically connected to the control device 16.

[0059] Input device 201 can be a physical button, touch panel, or voice input device. Input device 201 is used to input various conditions into control device 16. These various conditions include fabric conditions and weaving conditions. Fabric conditions include, for example, the material and count of the weft yarn Y, weft yarn type, weft yarn density, the material and count of the warp yarn T, warp yarn type, warp yarn density, weave width TL, and fabric structure. Weaving conditions include, for example, loom speed, compressed air pressure in main air tank 26 and auxiliary air tank 34, opening degree of main valve 22v, tandem valve 21v, and auxiliary valve 32, and weft insertion start time. Furthermore, the input device 201 performs the selection of the setting mode and the setting of the action type of auxiliary valve 32.

[0060] The display device 202 is a liquid crystal display or an organic electroluminescent display.

[0061] The type setting storage unit 111 stores the set action types. As action types, the first action type P1, the second action type P2, and the third action type P3 are stored in the type setting storage unit 111.

[0062] Action type 1 P1, action type 2 P2, and action type 3 P3 are stored as action types that cause different travel speeds of the weft yarn Y.

[0063] Action types P1, P2, and P3 are set to be adjusted by a human based on experimental and empirical rules, allowing for actual adjustments to the opening degree and opening time of the secondary valve 32, or through experiments to determine these parameters. Alternatively, action types P1, P2, and P3 can be generated by machine learning based on type setting storage unit 111. Examples of machine learning algorithms include SSD (Single Shot Multibox Detector), RCNN (Regional Convolutional Neural Network), Fast R-CNN, Faster R-CNN, and YOLO (You Only Look Once).

[0064] In addition, the data related to the final arrival time Tw is recorded as [Final Arrival Time Data D1], and the data related to the intermediate arrival time Ti is recorded as [Intermediate Arrival Time Data D2]. Furthermore, the data related to the time difference ΔT is recorded as [Time Difference Data D3].

[0065] The type setting storage unit 111 acquires the final arrival time data D1 from the first weft yarn detection unit 40 and the intermediate arrival time data D2 from the second weft yarn detection unit 41 for each of the three operation types stored in the type setting storage unit 111. The acquired final arrival time data D1 and intermediate arrival time data D2 are stored and accumulated in the type setting storage unit 111. In addition, the type setting storage unit 111 calculates the time difference data D3 using the acquired final arrival time data D1 and intermediate arrival time data D2 for each of the three operation types stored in the type setting storage unit 111. The calculated time difference data D3 is stored and accumulated in the type setting storage unit 111. Moreover, the type setting storage unit 111 establishes an associated storage of the final arrival time data D1, intermediate arrival time data D2, and time difference data D3 for each operation type.

[0066] The type extraction unit 121 establishes associated time difference data D3 for each action type in the type setting storage unit 111, and extracts the action type with the largest time difference data D3 (in other words, time difference ΔT) from the first action type P1, the second action type P2, and the third action type P3. In this embodiment, the type extraction unit 121 extracts the first action type P1. In other words, the type extraction unit 121 extracts the first action type P1 as the action type that has the least impact on the weft yarn Y when the weft yarn stop pin 18 stops at the weft yarn Y.

[0067] The type extraction unit 121 displays the extracted action type (in other words, the first action type P1) on the display device 202. Therefore, the display device 202 displays the first action type P1 extracted by the type extraction unit 121. At this time, as... Figure 7 As shown, the display device 202 displays the opening time of the main valve 22v and the auxiliary valve 32, and the travel curve of the weft yarn Y.

[0068] Furthermore, among the first action type P1, the second action type P2, and the third action type P3, the second action type P2 becomes the action type with the smallest final arrival time Tw. Additionally, the third action type P3 becomes the action type with the largest final arrival time Tw below a predetermined value and the largest associated time difference ΔT. Moreover, the predetermined value for "final arrival time Tw below a predetermined value" in the third action type P3 is a final arrival time Tw value that maintains a high conveying efficiency of the weft yarn Y.

[0069] like Figure 6 As shown, the mode selection unit 131 displays two condition modes on the display device 202. The two condition modes are condition selection mode M1 and condition input mode M2. Condition selection mode M1 is a mode that allows selection of a desired condition from a set of preset conditions. Furthermore, if condition selection mode M1 is selected, the mode selection unit 131 displays the condition for extracting the action type with the largest time difference ΔT on the display device 202 in a selectable manner, such as... Figure 5 The display device 202 shows multiple conditions such as high conveying efficiency J1, shock mitigation J2, and balance J3.

[0070] Impact mitigation J2 is conditional on minimizing the impact on weft yarn Y when the weft yarn stop pin 18 stops at weft yarn Y (in other words, maximizing the time difference ΔT). High conveying efficiency J1 is conditional on maximizing the arrival time Tw of the end of weft yarn Y (in other words, minimizing the final arrival time Tw). Balance J3 is conditional on maximizing the time difference ΔT within the final arrival time Tw below a predetermined value.

[0071] Conditional input mode M2 ​​is a mode in which desired conditions are input from the input device 201. Examples of desired conditions include, for example, a predetermined value in the third action type P3, the number of action types displayed under conditions of high conveying efficiency J1 and shock mitigation J2, etc.

[0072] <The Role of the Implementation Method>

[0073] Next, the method of using the information display device 100 to prompt the user of the air-jet loom with the desired type of action will be described as an example. Furthermore, although the information display device 100 is operated by an operator different from the user, it can also be operated by the user.

[0074] First, if the author selects the action type setting mode based on the operation of the input device 201, the action type setting mode is set in the information display device 100.

[0075] If a trial weaving is performed on the air-jet loom and the weft insertion device 10 is used after selecting the setting mode for the action type, the type setting storage unit 111 executes the first to third action types P1 to P3 stored in the type setting storage unit 111 separately, and acquires the final arrival time data D1 and intermediate arrival time data D2 for each of the first to third action types P1 to P3. The acquired final arrival time data D1 and intermediate arrival time data D2 are progressively stored and accumulated in the type setting storage unit 111. In addition, the type setting storage unit 111 calculates the time difference data D3 using the acquired final arrival time data D1 and intermediate arrival time data D2 for each of the first to third action types P1 to P3. The calculated time difference data D3 is progressively stored and accumulated in the type setting storage unit 111 in a correlated manner for each of the first to third action types P1 to P3.

[0076] When a predetermined amount of data has been accumulated, the operator operates the input device 201 to select the conditional mode of the action type.

[0077] like Figure 6 As shown, the mode selection unit 131 causes the display device 202 to display two condition modes. If the operator selects condition selection mode M1, then... Figure 5As shown, the mode selection unit 131 displays three conditions on the display device 202. If the operator selects Shock Mitigation J2 as the condition, the type extraction unit 121 extracts the first action type P1 with the largest time difference data D3 from the first to third action types P1 to P3, based on the time difference data D3 associated with the first to third action types P1 to P3. In other words, the type extraction unit 121 extracts the first action type P1 as the action type consistent with "Shock Mitigation J2". Then, the type extraction unit 121 displays the extracted first action type P1 on the display device 202.

[0078] As a result, such Figure 7 As shown, the user of the air-jet loom is advised of the type of operation of the secondary valve 32 that minimizes the impact when the weft yarn stop pin 18 stops at the weft yarn Y. The user adjusts the opening of the secondary valve 32 to insert the weft into the weft insertion device 10 using the proposed first type of operation P1.

[0079] According to the above implementation method, the following effects can be obtained.

[0080] (1) In the information display device 100, the type setting storage unit 111 actually acquires the final arrival time data D1 and intermediate arrival time data D2 for each of the first to third action types P1 to P3 during trial weaving, calculates the time difference data D3, and stores them in association with the first to third action types P1 to P3. Then, the type extraction unit 121 extracts the first action type P1 based on the actually acquired values, as the action type that minimizes the impact when the weft yarn stop pin 18 stops at the weft yarn Y. The larger the time difference ΔT, the smaller the impact on the weft yarn Y when the weft yarn stop pin 18 stops at the weft yarn Y. Therefore, based on the first action type P1 with the largest time difference data D3 representing the time difference ΔT, the multiple sub-valve 32 are activated respectively, thereby minimizing the impact on the weft yarn Y when the weft yarn stop pin 18 stops at the weft yarn Y. Furthermore, without changing the weft insertion start time of weft yarn Y, from the first to third action types P1 to P3 of the multiple sub-valve 32, which are set to inject compressed air from the sub-nozzle 15, the first action type P1 with the largest associated time difference ΔT is extracted. Therefore, it is easy to set an action type that reduces the impact on weft yarn Y when weft yarn Y is stuck based on weft yarn stop pin 18 without delaying or advancing the weft insertion start time.

[0081] (2) The weft insertion start time for action types P1 to P3 (1st to 3rd action types) is the same. Therefore, regardless of which action type P1 to P3 is extracted by the type extraction unit 121, the fabric productivity is not affected. Moreover, by simply adjusting the operation of the multiple sub-valve 32, the impact acting on the weft yarn Y can be reduced. Therefore, the impact acting on the weft yarn Y can be reduced without increasing the fabric production cost or reducing the fabric productivity.

[0082] (3) The inventors discovered that if the time difference ΔT between the final arrival time Tw and the intermediate arrival time Ti is maximized, the impact acting on the weft yarn Y can be minimized. Therefore, the impact acting on the weft yarn Y can be measured without using a force sensor. Thus, the situation where sliding resistance is generated upon contact with the weft yarn Y, leading to an increase in jet pressure due to sliding resistance, as is the case when a force sensor is used, is avoided, thereby reducing the impact acting on the weft yarn Y.

[0083] (4) The third action type P3 is the action type where the final arrival time Tw is below a predetermined value and the associated time difference ΔT is also the largest among the final arrival times Tw below the predetermined value. By extracting this third action type P3, it is possible to easily set an action type that ensures a high conveying efficiency of the weft yarn Y while maintaining the final arrival time Tw below the predetermined value and reduces the impact on the weft yarn Y.

[0084] (5) The second weft yarn detection unit 41, which detects the intermediate arrival time Ti, is a textile width sensor located within the textile width TL and facing the reed inner passage 14a. Compared to the case where the second weft yarn detection unit 41 is located outside the textile width TL of the reed inner passage 14a, the distance between the first weft yarn detection unit 40 and the second weft yarn detection unit 41 can be increased, thus making the correlation between the magnitude of the impact and the time difference ΔT more accurate.

[0085] (6) The mode selection unit 131 of the information display device 100 displays the extraction conditions on the display device 202 in a way that can be pre-selected. Therefore, it is easier to perform extraction operations of the type of action that reduces the impact on the weft yarn Y.

[0086] This embodiment can be modified as follows. This embodiment and the following modifications can be combined and implemented to the extent that they do not contradict each other technically.

[0087] Alternatively, the trial weaving of the air-jet loom may not be performed on all action types stored in the type setting storage unit 111, but on action types whose range has been narrowed based on past trial weaving results, or on action types newly generated from the stored action types.

[0088] Alternatively, the type extraction unit 121 may not only extract the action type with the largest time difference ΔT, but may extract multiple action types, including the action type with the largest time difference ΔT. For example, the type extraction unit 121 may use the action type with the largest time difference ΔT as the top-ranked type, and also extract multiple action types that are ranked higher up with decreasing time differences ΔT.

[0089] Alternatively, the intermediate arrival time Ti can be obtained from the weft unwinding signal output by the air ring sensor 19. In this case, for the intermediate arrival time Ti, the (n-1)th weft unwinding signal in the weft unwinding signal output by the air ring sensor 19 is taken as the intermediate arrival time Ti. With this configuration, the second weft detection unit 41 is not required, and the type setting storage unit 111 can obtain the intermediate arrival time Ti. In other words, the intermediate arrival time Ti can be obtained using the air ring sensor 19 required for the weft yarn Y to pass through, and therefore, the intermediate arrival time Ti can be obtained without increasing the number of parts.

[0090] Alternatively, the information display device 100 may not have a mode selection unit 131. In this case, the type extraction unit 121 always extracts the action type with the largest time difference ΔT and displays it on the display device 202.

[0091] Alternatively, the mode selection unit 131 may display only the condition selection mode M1 or only the condition input mode M2 ​​on the display device 202.

[0092] ○ The action type stored in the type setting storage unit 111 can be either the first action type P1 or the third action type P3, or it can be either the first action type P1 or the second action type P2.

[0093] Alternatively, the action types stored in the type setting storage unit 111 may be 4 or more.

[0094] Alternatively, the display method of the action type extracted by the type extraction unit 121 may not be... Figure 7 Such a coordinate graph. In other words, if the action type of the secondary valve 32 can be understood to the extent that the first action type P1 can be achieved, then the display method of the first action type P1 can also be appropriately changed. For example, it is also possible to display the opening time of each secondary valve 32 numerically, or to display the position of the secondary valve 32 that increases the opening time in text.

[0095] This document records the technical concepts that can be grasped based on the above-described implementation methods and modifications.

[0096] [Method 1]

[0097] An information display device for an air-jet loom, the air-jet loom comprising: a weft insertion device that unwinds a weft yarn wound on a storage cylinder by retracting a weft yarn catch pin, and guides the unwound weft yarn through a reed passage via a main nozzle and multiple auxiliary nozzles to the opening of the warp yarn; a first weft yarn detection unit that outputs the final arrival time of the end of the inserted weft yarn reaching its final arrival position; and a second weft yarn detection unit that outputs the intermediate arrival time of the end of the inserted weft yarn reaching a predetermined position upstream in the weft insertion direction from the final arrival position. The information display device for the air-jet loom is characterized by comprising: a type setting... The system includes a storage unit that stores the action type set for the operation of the auxiliary valve that injects compressed air from the auxiliary nozzle according to each of the plurality of auxiliary valves, and obtains the final arrival time and the intermediate arrival time for each of the plurality of action types stored therein, and stores the time difference between the final arrival time and the intermediate arrival time in association for each of the action types; a type extraction unit that extracts the action type with the largest time difference that is associated with the plurality of action types stored in the type setting storage unit; and a display device that displays the action type extracted by the type extraction unit.

[0098] [Method 2]

[0099] In the information display device of the air-jet loom described in [Method 1], the second weft yarn detection unit is arranged in a position facing the reed inner passage within the textile width.

[0100] [Method 3]

[0101] In the information display device of the jet loom described in [Method 1], the second weft yarn detection unit is a loop sensor that detects the weft yarn unwound from the storage cylinder.

[0102] [Method 4]

[0103] In the information display device for the jet loom described in any one of [Method 1] to [Method 3], the type extraction unit extracts the action type with the largest time difference among the multiple action types stored in the type setting storage unit, where the final arrival time is below a predetermined value and an association is established.

[0104] [Method 5]

[0105] The information display device for the air-jet loom in any one of [Method 1] to [Method 4] includes a mode selection unit, which displays the conditions for extracting the action type with the largest time difference in a selectable manner on the display device.

Claims

1. An information display device for a jet loom, the jet loom comprising: The weft insertion device unwinds the weft yarn wound on the storage cylinder by retracting the weft yarn stop pin, and guides the unwound weft yarn through the reed's internal passage and to the warp opening by the main nozzle and multiple auxiliary nozzles. The first weft yarn detection unit outputs the final arrival time when the end of the inserted weft yarn reaches the final arrival position of the weft yarn; as well as The second weft yarn detection unit outputs the intermediate arrival time of the end of the inserted weft yarn at a predetermined position upstream in the weft insertion direction, which is earlier than the final arrival position. The information display device for the air-jet loom is characterized by having: The type setting storage unit stores the action type set for the operation of the auxiliary valve that injects compressed air from the auxiliary nozzle for each of the multiple auxiliary valves, and obtains the final arrival time and the intermediate arrival time for each of the multiple stored action types, and stores the difference between the final arrival time and the intermediate arrival time, i.e., the time difference, in an associated manner for each action type. The type extraction unit extracts the action type with the largest time difference that is associated with a plurality of action types stored in the type setting storage unit; as well as The display device displays the action type extracted by the type extraction unit.

2. The information display device for a jet loom according to claim 1, characterized in that, The second weft yarn detection unit is positioned opposite the reed inner passage within the textile width.

3. The information display device for a jet loom according to claim 1, characterized in that, The second weft yarn detection unit is a loop sensor that detects the weft yarn unwound from the storage cylinder.

4. The information display device for a jet loom according to claim 1 or 2, characterized in that, The type extraction unit extracts the action type from among the multiple action types stored in the type setting storage unit whose final arrival time is below a predetermined value and whose associated time difference is the largest.

5. The information display device for a jet loom according to claim 1 or 2, characterized in that, The device includes a mode selection unit that displays the conditions for extracting the action type with the largest time difference in a selectable manner on the display device.

Images