JP2011058147A - Method for weft-insertion control in towel loom - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control method capable of reducing the number of weft insertion lines to the utmost in a towel loom where pile weaving and border weaving are conducted. <P>SOLUTION: The method for weft-insertion control in a towel loom is such that: in the towel loom where pile weaving and border weaving are conducted by controlling weft-insertion lines for the border weaving and weft-insertion lines for the pile weaving in accordance with weft-inserting conditions set correspondingly to these lines the border weaving is conducted in two or more weft-insertion lines; for border weaving-exclusive weft-insertion lines whose number is one or more and less than the total lines among the two or more weft-insertion lines, weft-inserting conditions corresponding to the border weaving are set for control use; while, for the other weft-insertion lines, weft-inserting conditions corresponding to both the pile weaving and the border weaving are set for control use; and for the weft-insertion lines other than the border weaving-exclusive ones, weft insertion is conducted through selecting those corresponding to the kind of weaving from among the two weft-inserting conditions. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a weft insertion control method for a towel loom that controls the weft insertion of a weft when performing pile weaving and border weaving.

  As a method of controlling the operation speed of the towel loom, the main shaft rotation speed (operation speed) of the loom is different between pile weaving and border weaving. Specifically, the main shaft rotation speed during pile weaving is higher than that during border weaving. (Patent Document 1).

  Also, in recent general looms, multiple weft insertion-related devices (length measuring storage device, main nozzle, sub nozzle, etc.) for one type of weft work together to realize one weft insertion. ing. The group to which these weft insertion related devices belong is called “weft insertion series” in this application.

Japanese Patent No. 2614072 (left column of page 5, third paragraph)

  When weaving at different spindle speeds for each type of weaving, such as pile weaving and border weaving, as in Patent Document 1, weft insertion with the same weft insertion conditions such as fluid injection timing and injection pressure , Weft insertion may not be performed normally. In such a case, weft insertion using a weft insertion condition that differs for each type of weaving is performed in a conventional weft insertion control device. In addition, pile weaving and border weaving using different weft insertion conditions are generally performed in separate weft insertion sequences. That is, the towel weaving machine is provided with a weft insertion line for pile weaving and a weft insertion line for border weaving, and weft insertion is performed by a dedicated weft insertion line corresponding to each type of weaving.

  Therefore, for example, when two types of weft are used for border weaving and one type of weft is used for pile weaving, the towel loom needs to have at least three weft insertion lines. For example, even if one of the two types of wefts used in border weaving is the same as the weft used in pile weaving, it is necessary to provide such a quantity of weft insertion series. As a result, there is a problem that the number of weft insertion series to be provided in the towel loom increases, and the equipment cost increases accordingly.

  In the loom, when wefts of the same type are continuously inserted, the weft insertion in the length measuring storage device will not be in time as the spindle speed increases, and weft insertion due to unwinding failure. Defects may occur. Therefore, in order to prevent this, two weft insertion series are assigned to one type of weft, although one weft insertion series is assigned to one type of weft. In some cases, a weft insertion control method is used in which weft insertion is performed by alternately performing weft insertion operations.

  This weft insertion control method can also be applied to a towel loom, in which case the number of weft insertion series to be provided in the towel loom is doubled. Therefore, in this case, the above-mentioned problem of equipment cost is further increased.

  An object of the present invention based on the above situation is to provide a weft insertion control method capable of reducing the number of weft insertion series as much as possible in a towel loom in which pile weaving and border weaving are performed.

  The weft insertion control method of the towel loom of the present invention includes a pile weaving and a border weaving by controlling a weft insertion series for border weaving and a weft insertion series for pile weaving according to the weft insertion conditions set according to each. Assuming a towel loom to perform.

  The towel loom performs border weaving using two or more weft insertion series, and is a weft insertion dedicated to border weaving that is at least one of the two or more weft insertion series and less than the total number. In order to control the weft insertion sequence, set the weft insertion conditions corresponding to the border weaving, and for the other weft insertion sequences, to control the weft insertion sequence, pile weaving and border weaving Two corresponding weft insertion conditions are set, and the weft insertion line other than the one for exclusive use of border weaving selects the one corresponding to the type of weaving from the two weft insertion conditions and performs the weft insertion. Features.

  According to the weft insertion control method of the towel loom of the present invention, for the weft insertion series for border weaving which is not dedicated to the border, the pile weaving and the border weaving are controlled in order to control the weft insertion series. By setting two corresponding weft insertion conditions and alternately selecting the one corresponding to the type of weaving from the two weft insertion conditions during weaving, at least one weft insertion sequence Weft insertion for pile weaving and border weaving can be used together, and the number of weft insertion lines, and hence equipment costs, can be reduced by the amount used for both weaving. In other words, according to the present invention, pile weaving and border weaving can be realized by at least two weft insertion series including a weft insertion series dedicated to border weaving and a weft insertion series that also serves as border weaving and pile weaving.

It is explanatory drawing which shows the principal part of the weft insertion apparatus in a towel loom.

  FIG. 1 shows a main part of a towel loom to which the present invention is applied. Further, in the following description, an example is described in which two types of wefts 14 are wefted by border weaving and one of these wefts is wefted by pile weaving.

  In FIG. 1, the weft insertion device 11 having two weft insertion sequences 1 and 2 is shown, but actually the weft insertion device 11 having four weft insertion sequences 1, 2, 3, and 4. In the following, explanation will be made based on the premise. The weft insertion device 11 divides the four weft insertion sequences into groups of two weft insertion sequences, wefts different types of wefts 14 in both groups, and one type of two weft insertion sequences in each group Of wefts shall be inserted alternately. All four weft insertion lines are for border weaving, and two weft insertion lines 2 and 4 in one group are also used for pile weaving. The two weft insertion lines 1 and 3 in the other group are not used for pile weaving but are used as a weft insertion line exclusively for the border.

  In the weft insertion device 11 of FIG. 1, the wefts 14 to be inserted in each weft insertion series 1, 2, 3, 4 are drawn out from the yarn feeder 13 supported by the yarn feeder stand 12, and are, for example, drum type The yarn winding arm 16 is guided to the inside of the yarn winding arm 16 of the length measuring and storage device 15 and is wound around the outer peripheral surface of the drum 17 by the rotational movement of the yarn winding arm 16 while being locked by the locking pin 18 on the outer peripheral surface of the drum 17 in a stationary state. It is done. Accordingly, the weft 14 having a length necessary for one weft insertion is wound around the outer peripheral surface of the drum 17 and stored until the weft 14 is inserted.

  The length measuring storage device 15 (the rotational movement of the yarn winding arm 16 and the forward / backward movement of the locking pin 18) and the main nozzle 21 for weft insertion, which will be described later, are inserted into the weft insertion pattern by the weft insertion controller 46 of the loom controller 45. The selection is performed based on the selection order of the wefts 14 (selection order of the weft insertion series) defined in (1).

  At the weft insertion start timing, when the locking pin 18 corresponding to the weft thread 14 selected by the weft insertion control device 46 is driven by the operating device 19 and retracts from the outer peripheral surface of the drum 17, it is wound around the outer periphery of the drum 17. The weft 14 having a length necessary for one weft insertion can be unwound on the drum 17. The weft thread 14 is passed from the drum 17 to the main nozzle 21 for weft insertion, and is unwound from the drum 17 and inserted by wetting of the main nozzle 21.

  The main nozzle 21 corresponding to the selected weft 14 starts jetting of pressurized air toward the opening 25 of the warp 24 at the set weft insertion start timing, and continues jetting for the set jetting period. Thus, the weft 14 having a predetermined length is inserted into the opening 25. By this injection operation, the weft 14 travels along the weft travel path in the opening 25. The pressure air is supplied from a pressure air source 35, adjusted to an appropriate air pressure for weft insertion by a pressure regulator 36, and then supplied to the main nozzle 21 via an electromagnetic on-off valve 37. The electromagnetic on-off valve 37 operates based on the weft selection order defined in the weft insertion pattern under the control of the weft insertion control device 46.

  In the process in which the wefts 14 inserted in the weft travel along the travel path in the opening 25, the plurality of groups of sub nozzles 22 simultaneously inject the pressure air into the weft travel path toward the travel direction of the weft 14. Relay injection is performed to urge the flying weft 14 in the weft insertion direction. The pressure air is supplied from the pressure air source 35, adjusted to an appropriate air pressure by the pressure regulator 38, and then supplied to the sub nozzles 22 of each group through the electromagnetic on-off valves 39 corresponding to the groups. Each electromagnetic on-off valve 39 supplies the pressure air to the sub nozzles 22 of the corresponding group at the set timing under the control of the weft insertion control device 46, and jets the pressure air from the sub nozzles 22 so that the flying weft 14 is Energize in the weft insertion direction.

  The pressure regulator 38 for the sub nozzle described above may be a pressure regulating valve. However, since there is a problem in terms of responsiveness, the pressure regulator 38 has a plurality of flow paths corresponding to the number of weft insertion series 1 and 2 each having a pressure regulating valve or the number of pressure values to be switched. It is preferable to selectively switch by the switching valve.

  When the weft yarn 14 is normally inserted by the injection operation of the main nozzle 21 and the sub nozzles 22 of the plurality of groups, the weft yarn 14 is beaten on the pre-weaving 29 of the woven fabric 28 by the hammering motion of the collar 27, After being woven into the woven fabric 28, it is cut by the yarn feeding cutter 30 on the weft insertion side, and is cut off from the weft 14 inside the main nozzle 21.

  Whether the weft insertion has been performed normally is detected by the weft feeler 31. The weft feeler 31 includes a first sensor and a first sensor disposed opposite to the weft runway at two positions, a position near the woven end portion of the woven fabric 28 on the opposite weft insertion side, and a position further away in the weft insertion direction. Based on the detection signal from the second sensor, it is determined whether or not weft insertion has been performed normally.

  The first sensor at a position in the vicinity of the woven end portion of the woven fabric 28 is provided at a position where the weft thread 14 that has been normally inserted can reach, and detects the tip of the weft thread 14 that has been normally inserted therein. . This detection is performed by comparing the level of the detection signal generated in the first sensor with the reference signal level within the normal arrival time (set detection period) of the weft 14. Therefore, according to the first sensor, a weft insertion defect (show topic, ben topic, etc.) in which the tip of the weft 14 does not reach the position of the first sensor despite the weft insertion is detected. The detection period is normally set on the rotation angle of the main shaft 41.

  In the detection period, when the first sensor detects the arrival of the weft 14, the first sensor generates an output signal corresponding thereto. At that time, the weft feeler 31 generates a yarn signal S1 corresponding to normal weft insertion based on the output signal from the first sensor, and sends this yarn signal S1 to the main controller 47 of the loom control device 45. The main controller 47 continues the operation (weaving) of the loom on the condition that the yarn signal S1 corresponding to normal weft insertion exists.

  During the detection period, when the yarn signal S1 is not generated, that is, when the weft insertion failure has occurred and the first sensor cannot detect the arrival of the weft 14, the weft feeler 31 performs the weft insertion. It is determined that there is an abnormality, and a weft stop signal (also referred to as “first weft stop signal”) S 2 is output, and this weft stop signal S 2 is sent to the main controller 47. Then, when receiving the weft stop signal S2, the main controller 47 immediately executes stop control to stop the loom at a predetermined angle of the main shaft 41.

  The second sensor at a position further away from the first sensor in the weft insertion direction opposes the weft runway at a position where the weft thread 14 which has been normally inserted does not reach, and the weft thread 14 is blown out or long picked. Provided to detect weft insertion failure. This detection is performed by comparing the level of the detection signal generated in the second sensor with the level of the reference signal at the abnormal arrival time (arrival angle) of the weft 14 within the detection period.

  The detection period is normally set on the rotation angle of the main shaft 41. During this detection period, when the output signal from the second sensor is input, the weft feeler 31 determines that the weft insertion is abnormal, and the weft stop signal (also referred to as “second weft stop signal”) S3. The weft stop signal S3 is sent to the main controller 47. When receiving the second weft stop signal S3, the main controller 47 immediately stops the loom at a predetermined angle of the main shaft 41 in the same manner as when receiving the first weft stop signal S2.

  In order to detect the rotation angle θ of the main shaft 41, an angle detector (encoder) 43 is connected to the main shaft 41 via a driving motor 42. The encoder 43 generates a signal of the rotation angle θ of the main shaft 41 during weaving and sends it to the main controller 47, the weft insertion control device 46 and the opening control device 44 of the loom control device 45.

  In the opening control device 44, a weaving pattern including pile weaving and border weaving is set. The weaving pattern is a weaving condition such as a weft insertion pattern and an opening pattern in addition to the density number for each weaving step, and these are preset in the opening control device 44 via the setting unit 48.

  The density number is a number set corresponding to the weft density. The weft density used for actual weaving is not set in the opening control device 44 but is preset in the main controller 47 of the loom control device 45 via the setting device 48.

  The weft insertion pattern is a set of weft insertion sequences corresponding to the wefts used for weft insertion for each weaving cycle as one repeat of the weaving structure. The weft insertion sequence for each weaving cycle is step No. 1 ( The first weaving cycle of the weaving structure 1 repeat) is set for the total steps in order. The total step is the number of weaving cycles (= number of picks) of one woven structure repeat. The weaving step is a stage in which the weaving cycle proceeds within one repeat of the weaving structure, and the step number (number) indicates the stage (numbering weaving cycle). is there. Therefore, 1 step = 1 weaving cycle.

  The opening pattern is the one in which the driving mode of each reed frame for each weaving cycle is set as one repeat of the weaving structure, and the position of the reed frame at the time of warp opening for each weaving cycle (the highest position / the lowest position) Are set for the total number of steps in order from step No. 1 (the first weaving cycle of the weaving structure 1 repeat).

  The opening control device 44 counts the number of cycles for each weaving cycle based on the signal of the rotation angle θ from the encoder 43 described above. Then, the opening control device 44 outputs a weft selection signal S5 corresponding to the selected weft insertion sequence to the weft insertion control device 46 according to the set weft insertion pattern according to the count value of the number of cycles. Further, the opening control device 44 sends the density signal S4 corresponding to the density number assigned to either the pile weaving or the border weaving for each weaving cycle, and the main controller 47 and the weft insertion control device of the loom control device 45. 46 respectively.

  The loom control device 45 is composed of a main controller 47 and the weft insertion control device 46 of the present invention in order to control the loom in synchronization with the rotation of the main shaft 41 of the loom and to perform other necessary controls. Has been.

  In the main controller 47, in addition to the weft density, two set rotational speeds for pile weaving and border weaving are set in advance via a setting device 48. The set rotational speed is a set value of the rotational speed of the main shaft 41 and is set in correspondence with a density number preset in the opening control device 44.

  During the weaving, the main controller 47 receives the input of the density signal S4 corresponding to the density number from the opening control device 44, and has two preset rotation speeds for pile weaving and border weaving. The one corresponding to the density number is selected, and the rotation of the main shaft 41 (primary motor 42) is controlled according to the selected set rotational speed.

  Accordingly, the main controller 47 selects one corresponding to the density signal S4 from preset weft densities and is driven in synchronization with the rotation of the main shaft 41 according to the selected weft density. (Not shown) and a winding device (not shown) are controlled. This changes the weft density of the woven fabric 28 to be woven.

  In the weft insertion control device 46 of the present invention, weft insertion conditions for controlling each weft insertion series 1, 2, 3, 4 are set and stored from a setting device 48. Among these, weft insertion conditions for controlling the weft insertion series 2 and 4 that are also used for pile weaving are two types of weft insertion conditions corresponding to border weaving and pile weaving. For example, border weaving And weft insertion start timing (driving timing of the operating device 19 (weft unwinding timing) for retracting the locking pin 18, timing of fluid injection start of the main nozzle 21, etc.).

  Further, the weft insertion conditions for controlling the weft insertion sequences 1 and 3 that are not used for pile weaving (dedicated to the border) are only the weft insertion conditions corresponding to the border weaving.

  In the weft insertion control device 46, similarly to the main controller 47, two types of set rotational speeds for pile weaving and border weaving are set in advance via a setting device 48. The set rotational speed is set in correspondence with the density number preset in the opening control device 44. Accordingly, the weft insertion control device 46 can determine the type of weaving based on the set rotational speed.

  The weft insertion control device 46 receives the weft selection signal S5 from the opening control device 44, and selects the one corresponding to the weft selection signal S5 from the weft insertion series. Further, the weft insertion control device 46 receives the input of the density signal S4 corresponding to either the pile weaving or the border weaving from the opening control device 44, and presets two values for pile weaving and border weaving. Select the type corresponding to the density number from the set rotation speeds, determine the type of weaving to be performed from the selected setting rotation speed, and control the selected weft insertion sequence Is selected according to the type of weaving, and the weft insertion sequence is controlled according to the selected weft insertion conditions. Specifically, the operations of the weft insertion series length measuring storage device 15, main nozzle 21, sub nozzle 22 and the like corresponding to the weft selection signal S5 are controlled based on an appropriate rotation angle θ of the main shaft 41, and the weft insertion is performed. The weft insertion operation of the weft 14 selected by the series is executed.

  As described above, the “weft insertion series” refers to a set to which a plurality of weft insertion-related devices that operate to realize one weft insertion in cooperation. The “weft insertion-related device” is a device that is involved in the weft insertion of the weft 14 drawn from the yarn supply body 13 and is an apparatus that exists downstream from the yarn supply body 13. The weft-related device includes a length measuring storage device 15, a main nozzle 21, and a sub nozzle 22. However, among these, the sub-nozzle 22 is used in common in each weft insertion series 1, 2, 3, and 4.

  The loom control device 45 described above is configured as a combination of functional blocks. The loom control device 45 may be realized by combining devices composed of blocks, or by installing predetermined software on a computer and executing the software, the computer's input / output means, storage means, arithmetic control It is also possible to configure each block in which the means and software cooperate and to realize the block.

  Further, a setting device 48 such as a touch panel type or a keyboard can communicate with the opening control device 44, the main controller 47, and the weft insertion control device 46 in order to set data of weaving conditions including weft insertion conditions. Is provided.

  In the towel loom in which the above-described weft insertion conditions are set from the setting device 48, the weft insertion control method is performed by the following procedures (1) to (5).

  (1) First, the opening control device 44 counts the number of cycles for each weaving cycle based on the signal of the rotation angle θ from the encoder 43, and selects according to the set weft insertion pattern according to the count value of the number of cycles. A weft selection signal S5 corresponding to the weft insertion sequence is output to the weft insertion control device 46. In addition, the opening control device 44 outputs the density signal S4 corresponding to the density number in the set weaving condition at every predetermined timing (for example, the rotation angle of the main shaft 41 is 0 °) in one weaving cycle. The output is output to the insertion controller 46 and the main controller 47, respectively.

  (2) Upon receiving the weft selection signal S5 from the opening control device 44, the weft insertion control device 46 selects a weft insertion sequence corresponding to the weft selection signal S5. Here, it is assumed that one of the two weft insertion lines 2 and 4 assigned to the weft 14 also used for pile weaving is selected from the four weft insertion lines for border weaving.

  (3) Subsequently, upon receiving the density signal S4 from the opening control device 44, the weft insertion control device 46 sets the density number from among two preset rotational speeds for pile weaving and border weaving. A corresponding one is selected, and it is determined whether the type of weaving to be performed is pile weaving or border weaving according to the selected set rotational speed. Here, it is assumed that the discrimination result is pile weaving. In this case, the weft insertion control device 46 selects the weft insertion start timing corresponding to the pile weaving as the weft insertion condition from the weft insertion start timings for controlling the weft insertion sequence selected in (2). Weft insertion is performed by controlling the weft insertion sequence according to the insertion start timing.

  (4) At the time of weft insertion in the next weaving cycle, in response to the next weft selection signal S5 from the opening control device 44, the weft insertion control device 46 selects a weft insertion sequence corresponding to the weft selection signal S5. Here, it is assumed that the other of the two weft insertion series assigned to the weft 14 also used for pile weaving is selected.

  (5) Subsequently, in response to the next density signal S4 from the opening control device 44, the weft insertion control device 46 determines whether it is pile weaving or border weaving as in (3) above. Here again, it is assumed that the discrimination result is pile weaving. In this case, the weft insertion control device 46 selects the weft insertion start timing corresponding to the pile weaving as the weft insertion condition from the weft insertion start timings for controlling the weft insertion sequence selected in (4). Weft insertion is performed by controlling the weft insertion sequence according to the insertion start timing.

  In pile weaving as in (1) to (5), the weft insertion control device 46 alternates between the two weft insertion lines assigned to the wefts 14 also used for pile weaving among the four weft insertion series for border weaving. The same type of weft 14 is continuously inserted.

  As described above, in the above-described embodiment, the weft insertion control device 46 puts two weft insertion lines out of four weft insertion series for border weaving together with pile weaving, so that it is 6 in the conventional case. The required weft insertion series can be reduced to four, and the equipment cost can be reduced accordingly.

  The present invention is not limited to the above embodiments. For example, in the above embodiment, in order to prevent unraveling failure, a plurality of weft insertion sequences are assigned to one type of weft 14 to form one group, and two weft insertion sequences are alternately arranged for one yarn type. Weft insertion is carried out, but weft insertion series for border weaving may be made one by one with respect to the yarn type, and weft insertion may be made continuously in one weft insertion series.

  Further, in the above embodiment, the weft insertion series for border weaving is also used for pile weaving, and one type of weft 14 is used for pile weaving, but for the purpose of using a plurality of types of weft 14 for pile weaving, A weft insertion line for border weaving corresponding to different types of wefts 14 may be used for pile weaving, and a separate weft insertion line for piles is separately provided in the weft insertion control device 46 separately from the weft insertion line for double use. It may be provided.

  Further, in the above embodiment, the weft insertion control device 46 receives the input of the density signal S4 from the opening control device 44, and has two preset rotation speeds for pile weaving and border weaving. The one corresponding to the density number is selected and the type of weaving to be performed is determined based on the selected set rotational speed. However, the type of weaving to be performed may be determined based on the density signal S4.

1 weft insertion series 2 weft insertion series 3 weft insertion series 4 weft insertion series 11 weft insertion device 12 yarn feeder stand 13 yarn feeder 14 weft 15 length measuring storage device 16 yarn winding arm 17 drum 18 locking pin 19 actuator
21 main nozzle 22 sub-nozzle 24 warp 25 opening 27cm 28 woven fabric 29 before weaving 30 yarn feeding cutter 31 weft feeler
35 pressure air source 36 pressure regulator 37 electromagnetic on-off valve 38 pressure regulator 39 electromagnetic on-off valve
41 main shaft 42 prime motor 43 angle detector (encoder) 44 opening control device 45 loom control device 46 weft insertion control device 47 main controller 48 setting device

S1 Normal weft insertion signal S2 Weft stop signal S3 Weft stop signal S4 Density signal S5 Weft selection signal
θ rotation angle

Claims (1)

In a towel loom that performs pile weaving and border weaving by controlling the weft insertion series for border weaving and the weft insertion series for pile weaving according to the weft insertion conditions set according to each,
The towel loom performs border weaving using two or more weft insertion lines, and is a weft insertion line dedicated to border weaving that is at least one of the two or more weft insertion lines and less than the total number. In order to control the weft insertion series, weft insertion conditions corresponding to border weaving are set, and for the weft insertion series other than those described above, pile weaving and border weaving are supported to control the weft insertion series. Set two weft insertion conditions,
The weft insertion control method for a towel loom, wherein the weft insertion line other than dedicated for border weaving performs weft insertion by selecting one corresponding to the type of weaving from the two weft insertion conditions.

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