JP2773037B2 - Weft insertion method in jet room - Google Patents

Description

Description: Object of the Invention (Industrial Application Field) The present invention relates to a weft insertion method in a jet loom in which a plurality of wefts are inserted into a warp opening by a jetting fluid. (Prior art) The flight state of the weft inserted into the warp shedding is crucially determined by the setting conditions of the jetting fluid, and the suitability of these conditions greatly affects the quality of the fabric or the rate of occurrence of weft insertion errors. give. Therefore, when inserting a plurality of wefts, it is necessary to switch the conditions of the jet fluid in accordance with the type of the weft defined by the strength of the yarn, the degree of fluff, or the thickness of the fluff. In Japanese Patent Application Laid-Open No. 58-126344, the injection pressure is switched according to the type of weft. (Problems to be Solved by the Invention) However, the setting of the injection pressure according to the type of weft is restricted by the weft insertion condition of a preset weft insertion period.
The setting range of the injection pressure based on the assumption of a common weft insertion period for different wefts is limited. Therefore, in the method of switching and adjusting only the injection pressure which is a condition element of the injection fluid, it may be difficult to set an optimum injection pressure for the type of the weft depending on the combination of the types of the wefts. May decrease. Moreover, the difficulty in setting the injection pressure leads to waste of the injection fluid. Configuration of the Invention (Means for Solving the Problems) In view of the above, the present invention focuses on the fluid ejection timing which is another condition element of the ejection fluid. Selects and uses a specific weft insertion main nozzle corresponding to the weft targeted for weft insertion in the weft insertion for each weft insertion among the plurality of main nozzles, and an auxiliary nozzle is used for each weft insertion. It is assumed that all of the auxiliary nozzles are commonly used for all the wefts, and the ejection fluid pressure and fluid ejection timing for the auxiliary nozzles are a plurality of ejection fluid pressures and a plurality of ejection fluid pressures corresponding to the types of the plurality of wefts. The fluid ejection timing is input to the control device in advance, and at each weft insertion, the specific weft insertion main nozzle corresponding to the specific weft to be inserted is connected to the relevant nozzle. Start the weft insertion of the specific weft according to the set ejection fluid pressure and fluid ejection timing, and then start the weft insertion from the preset plurality of auxiliary nozzle ejection fluid pressures and fluid ejection timings. Fluid ejection is performed from all of the auxiliary nozzles according to a specific ejection fluid pressure and a fluid ejection timing selected corresponding to the specified particular weft, and weft insertion is performed. (Operation) That is, in each weft insertion during the weaving operation according to the weft insertion pattern, the weft insertion main nozzle corresponding to the specific weft targeted for the weft insertion in the weft insertion is set for the same nozzle. The weft insertion is started based on the ejection fluid pressure and the fluid ejection timing, and subsequently, a plurality of auxiliary nozzle ejection fluids set in advance corresponding to the plurality of wefts to be used for weaving. From the pressure and the fluid ejection timing, the ejection fluid pressure and the fluid ejection timing corresponding to the specific weft started to be inserted into the weft are selected. Fluid ejection is performed, and then the weft is inserted into the warp shed. As described above, in the switching adjustment combining the two condition elements of the ejection fluid pressure and the fluid ejection timing of all auxiliary nozzles commonly used for each weft insertion of a plurality of wefts, only the ejection pressure is used due to the complementarity of the two condition elements. The degree of freedom in setting conditions for each weft is increased as compared with the switching adjustment, and an appropriate injection pressure can be set for each weft even under the constraint of a common weft insertion period for a plurality of wefts. Therefore, each of the wefts is weft-inserted under appropriate injection conditions, and the appropriate weft insertion that leads to the improvement of the woven fabric quality while suppressing the consumption of the injection fluid is performed stably. (Embodiment) An embodiment embodying the present invention in a jet loom for weft insertion of two types of wefts will be described below with reference to the drawings. Reference numerals 1 and 2 denote winding type weft measuring and storing devices, each of which has a motor M1,
The wefts Y1, Y2 introduced into the rotation guide tubes 1a, 2a rotated by M2 are wound and supplied onto the drums 1b, 2b from a yarn winding tube (not shown). Weft yarns Y1 and Y2 wound on drums 1b and 2b of both weft length measuring and storing devices 1 and 2 are ejected from weft insertion main nozzles 4 and 5 mounted on a sley 3. The main nozzles 4 and 5 for inserting both wefts are deformed reeds (not shown) set up on the slay 3.
The weft yarns Y1 and Y2 are switched and arranged in accordance with a preset weft insertion pattern by an appropriate switching mechanism toward the weft guide passage of
Is injected into the weft guide passage from the weft insertion main nozzles 4 and 5. Ballooning suppression rings 6 and 7 are provided around the drums 1b and 2b, and electromagnetic solenoids 8 and 9 are mounted on the outer surfaces of the ballooning suppression rings 6 and 7 facing the front ends of the drums 1b and 2b. Double electromagnetic solenoid 8,9
Drive pins 8a, 9a protrude inside the ballooning suppression rings 6, 7 and intersect and separate from the peripheral surface of the drum 1b due to the excitation and demagnetization of the electromagnetic solenoids 8, 9, and the weft yarns Y1, Y2 on the drums 1b, 2b. Of the length measurement and storage from the drums 1b and 2b. Reflection type weft detectors 10, 11 are installed on the inner surfaces of the ballooning suppression rings 6, 7 on the side opposite to the electromagnetic solenoids 8, 9, and the wefts Y1, Y2 unwound from the drums 1b, 2b and drawn out. Is detected. In addition, photoelectric yarn storage detectors 12 and 13 are installed on the inner surfaces of the ballooning suppression rings 6 and 7 facing the yarn storage sites on the drums 1b and 2b, and the yarns on the drums 1b and 2b are detected. It is supposed to be. The weft insertion main nozzle 4 is connected to a compressed air supply tank 15 via an electromagnetic valve 14, and the weft insertion main nozzle 5 is connected to a compressed air supply tank 17 via an electromagnetic valve 16. A pressure controller is provided on the path from the compressed air supply tanks 15 and 17 to the compressor (not shown).
18,19 are interposed. Auxiliary nozzles 20A, 20B, 21A, 21B, 22A,
22B, 23A, 23B, 24A, 24B, 25A, 25B, 26A, 26B, 27A, 27B are supported upright, and these auxiliary nozzles 20A to 27B are paired adjacent to each other in order from the weft insertion main nozzles 4, 5 side. Connected in units. Auxiliary nozzle group 20,21,22,23,24,25,26,27
Are the solenoid valves 28A, 28B, 29A, 29B, 30A, 30B, 31A, 31
B, 32A, 32B, 33A, 33B, 34A, 34B, 35A, 35B electromagnetic valve group 28, 29, 30, 31, 32, 33, consisting of pairs adjacent to each other from the weft insertion main nozzle 4, 5 side It is connected to a compressed air supply tank 36 via 34, 35, and a pressure controller 37, 38, 3 is provided between each electromagnetic valve 28A-35B and the compressed air supply tank 36, respectively.
9,40,41,42,43,44,45,46,47,48,49,50,51,52 are interposed. A weft detector 53 is provided on the slay 3 near the end of the weaving width outside the auxiliary nozzle group 27, and detects a weft flying in the weft guide passage to detect the presence or absence of a weft. I have. The detection signals output from the weft detector 53, the weft detectors 10 and 11, and the winding amount detectors 12 and 13 are input to the control device C. The control device C includes an input / output interface, a central processing unit CPU, and a memory for storing various setting values input from the input setting device 54. The weft insertion pattern, the detection signal and the Based on a detection signal from the table rotation angle detector 55, an operation command is issued to the motor drive unit 56 for driving the motors M1 and M2, the solenoid drive unit 57 for driving the electromagnetic solenoids 8 and 9, and the valve drive unit 58 for driving the electromagnetic valve. Send. The various set values are the fluid ejection timing (hereinafter, “ejection timing”) in the weft insertion main nozzles 4 and 5 and the auxiliary nozzle groups 20 to 27 other than the weft insertion pattern.
Also called. ), That is, the opening / closing timing of the electromagnetic valves 14, 16, 28A to 35B, the amount of stored yarn, and the number of unwound yarns. The input setting of these various set values is performed by key operation of the input setting device 54. The input setting device 54 will be described. When the numeral 1 is displayed on the display unit 60 changed and displayed by the key group 59, the input setting of the opening / closing timing of the electromagnetic valve 14 becomes possible, and the display unit changed and displayed by the key group 61 The display value of the display unit 64 changed and displayed by the key 62 and the key group 63 indicates the timing of opening and closing the electromagnetic valve 14. After displaying these, press setting key 65
By turning ON, the opening / closing timing of the electromagnetic valve 14 is input and set to the control device C. The opening / closing timings of the electromagnetic valves 16, 28A to 35B are also input to the control device C by sequentially changing the number of valves displayed on the display unit 60 and performing the same operation as described above. After setting the opening / closing timing of the solenoid valves 14, 16, 28A to 35B, inputting the number of stored yarns is possible by displaying the number 19 on the display 60, the number of stored winding yarns is displayed on the display 62, and the setting key 65 Turn ON. If the number 20 is displayed on the display unit 60, the input setting of the number of unwinding yarns can be performed.
Is displayed, and the setting key 65 may be turned on. The key 66 is a read key, and the set value input and set is displayed on the display unit 67. The electromagnetic valves 14, 16, 28A to 35B set as input in this way
The opening and closing timings are indicated by the blocks in the graph of FIG. 2, and each block is composed of the main nozzles 4 and 5 for weft insertion and the auxiliary nozzle groups 20 to 20 adjusted and set by the pressure controllers 18, 19 and 37 to 52, respectively. The injection fluid pressure of 27 (hereinafter also referred to as “ejection pressure”) is also represented. There is a relationship of Pm2 <Pm1 between the injection pressure Pm1 of the weft insertion main nozzle 4 represented by the block Tm1 and the injection pressure Pm2 of the weft insertion main nozzle 5 represented by the block Tm2. The injection end timing of the main nozzle 4 is set later than the injection end timing of the weft insertion main nozzle 5. Blocks Ts11, Ts12, Ts13, Ts14, Ts18 and Ts
Auxiliary nozzle groups 20 to 2, represented by 21, Ts22, Ts23, Ts24, Ts28
The injection pressures of 3, 27 are set to binary values Ps1 and Ps3 in a relationship of Ps1> Ps3, and the blocks Ts15, Ts16, Ts17 and Ts25, Ts26,
The injection pressure of the auxiliary nozzle groups 24 to 26 represented by Ts27 is Ps2> Ps3
> Ps4 is set to binary values Ps2 and Ps4. The injection period represented by the block Ts2i (i = 1 to 8) is included in the injection period represented by the block Ts1i (i = 1 to 8). Now, with the start of the loom, the control device C instructs one of the two electromagnetic solenoids 8, 9 to excite and deactivate according to the set weft pattern, and the electromagnetic valves 14, 28A, 29A, 30A, 3
1A, 32A, 33A, 34A, 35A side and solenoid valve 16, 28B, 29B, 30B, 3
An instruction is issued to open or close any one of the 1B, 32B, 33B, 34B, and 35B sides. As a result, the weft Y1 is injected from the weft insertion main nozzle 4 with the injection pressure Pm1 and the injection timing represented by the block Tm1, and is inserted into the blocks Ts11 to Ts18.
Are drawn by the auxiliary nozzle groups 20 to 27 that perform the relay injection with the injection pressures Ps1 and Ps2 represented by. On the other hand, the weft Y2 is injected from the weft insertion main nozzle 5 with the injection pressure Pm2 and the injection timing represented by the block Tm2, and the relay injection is performed by the injection pressures Ps3 and Ps4 represented by the blocks Ts21 to Ts28. Are pulled by the auxiliary nozzle groups 20 to 27 which are to be driven. During the operation of the loom, the storage amount of the yarn on the weft length storage devices 1 and 2 is detected by the yarn storage amount detectors 12 and 13, and the control device C receives the signals from both the yarn storage amount detectors 12 and 13. An operation command is sent to the motors M1 and M2 so as to secure a winding thread storage amount set based on the detection signal or more. As described above, the two wefts Y1 and Y2 are inserted at the injection pressure and the injection timing set for each of the wefts Y1 and Y2, and are expressed by the preset weft insertion start timing θ1 and the weft leading end arrival timing θ2. Both wefts to ideal weft flight curve D obtained based on insertion period (θ1, θ2) and conventional weft flight data
Convergence of weft insertion of Y1 and Y2 is achieved. The injection pressure and injection timing set for the weft insertion main nozzles 4 and 5 and the auxiliary nozzle groups 20 to 27 corresponding to the weft yarns Y1 and Y2 are smaller than the switching adjustment of only the injection pressure due to complementarity of both. The degree of freedom in setting conditions for the weft is increased, and both wefts
Even under the constraint of the weft insertion period (θ1, θ2) common to Y1 and Y2, it is possible to set an appropriate injection pressure for each of the wefts Y1 and Y2. Therefore, weft breakage, loose posture of flying weft,
The setting of the injection pressure that can avoid the loosening of the weft posture after completion of weft insertion, and the injection timing that can smoothly perform the transfer of the weft from the preceding auxiliary nozzle group to the subsequent auxiliary nozzle group can be performed in either of the wefts Y1 and Y2. The weft insertion of the two wefts Y1 and Y2 shows good convergence to the weft flight curve D. That is, each of the weft yarns is weft-inserted under appropriate jetting conditions, and appropriate weft insertion that leads to improvement in the quality of the woven fabric is stably performed.
In addition, setting the proper injection pressure and injection timing for both wefts Y1 and Y2 will reduce the excess consumption of jetting fluid in both wefts Y1 and Y2 and reduce the total amount of fluid consumption. Leads to. The present invention is, of course, not limited to the above-described embodiment. For example, the present invention can be applied to a jet loom for inserting three or more types of wefts. Effects of the Invention As described in detail above, according to the present invention, in each weft insertion during the weaving operation, the main nozzle for weft insertion is a specific main nozzle individually corresponding to the specific weft targeted for weft insertion in the weft insertion. The nozzle is selected and used for each weft insertion, and the weft insertion is started from the same main nozzle based on the ejection fluid pressure and the fluid ejection timing set for the nozzle, while being commonly used for a plurality of wefts used for weaving. With respect to the ejection fluid pressure and fluid ejection timing from all the auxiliary nozzles used, the specific wetting started from a plurality of ejection fluid pressures and fluid ejection timings for auxiliary nozzles set in advance corresponding to the respective wefts. The optimal ejection fluid pressure and fluid ejection timing for all auxiliary nozzles for weft weft insertion are selected, and the selected ejection fluid pressure and fluid ejection tie are selected. Fluid ejection is performed from all the auxiliary nozzles to the weft being inserted by all the auxiliary nozzles, so that any of a plurality of wefts can be stabilized without any trouble by the complementarity of two elements of the injection condition, the injection fluid pressure and the fluid injection timing at the auxiliary nozzle. This has the excellent effect that the weft can be inserted and the consumption of the jet fluid can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic front view showing an embodiment embodying the present invention, and FIG. 2 is a graph showing the setting relationship of injection pressure and injection timing in each nozzle. Main nozzles 4,5 for weft insertion, solenoid valves 14,16,28A, 28B, 2
9A, 29B, 30A, 30B, 31A, 31B, 32A, 32B, 33A, 33B, 34A, 34B, 35
A, 35B, pressure controllers 18, 19, 37, 38, 39, 40, 41, 42, 43, 44, 45,
46,47,48,49,50,51,52, Auxiliary nozzles 20A, 20B, 21A, 21B, 22
A, 22B, 23A, 23B, 24A, 24B, 25A, 25B, 26A, 26B, 27A, 27B, input setting device 54, control device C, blocks Tm1, Tm2, Ts11, Ts12, Ts13 representing injection pressure and injection timing. , Ts14, Ts15, Ts1
6, Ts17, Ts18, Ts21, Ts22, Ts23, Ts24, Ts25, Ts26, Ts27, Ts2
8, weft Y1, Y2.

Claims (1)

(57) [Claims] A plurality of weft insertion main nozzles individually corresponding to a plurality of wefts, and a number of auxiliary nozzles arranged in the weft insertion direction are provided, and a predetermined weft is selected from the plurality of wefts according to a preset weft insertion pattern. Then, in a jet loom in which the selected weft is inserted into the warp shedding by the jetting fluid from the weft insertion main nozzle and the auxiliary nozzle, in each weft insertion during the weaving operation of the loom, the weft insertion main nozzle is Of the plurality of main nozzles, a specific weft insertion main nozzle corresponding to the weft targeted for weft insertion in the weft insertion is selected and used for each weft insertion, and the auxiliary nozzles are all used for each weft insertion. All of the auxiliary nozzles are commonly used for the weft yarn, and the ejection fluid pressure and the fluid ejection timing for the auxiliary nozzle A plurality of ejection fluid pressures and fluid ejection timings corresponding to the type of the liquid are input and set in the control device in advance, and at the time of each weft insertion, a specific weft insertion main nozzle corresponding to a specific weft to be inserted, the relevant nozzle. Starts the weft insertion of the specific weft according to the ejection fluid pressure and the fluid ejection timing set for, and then starts the weft insertion from among the preset plurality of auxiliary nozzle ejection fluid pressures and fluid ejection timings. A weft insertion method in a jet loom in which fluid injection is performed from all the auxiliary nozzles according to a specific ejection fluid pressure and a fluid ejection timing selected corresponding to the specified specific weft, and weft insertion is performed.