EP0878571A1 - Dispositif de contrÔle de l'insertion de trame avec installation pour l'identification de la trame pour métier à poil - Google Patents

Dispositif de contrÔle de l'insertion de trame avec installation pour l'identification de la trame pour métier à poil Download PDF

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Publication number
EP0878571A1
EP0878571A1 EP98105291A EP98105291A EP0878571A1 EP 0878571 A1 EP0878571 A1 EP 0878571A1 EP 98105291 A EP98105291 A EP 98105291A EP 98105291 A EP98105291 A EP 98105291A EP 0878571 A1 EP0878571 A1 EP 0878571A1
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EP
European Patent Office
Prior art keywords
weft
weaving
loom
pile
information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98105291A
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German (de)
English (en)
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EP0878571B1 (fr
Inventor
Yukihiro Tsuji
Taijirou Okuda
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Toyota Industries Corp
Original Assignee
Toyoda Jidoshokki Seisakusho KK
Toyoda Automatic Loom Works Ltd
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Application filed by Toyoda Jidoshokki Seisakusho KK, Toyoda Automatic Loom Works Ltd filed Critical Toyoda Jidoshokki Seisakusho KK
Publication of EP0878571A1 publication Critical patent/EP0878571A1/fr
Application granted granted Critical
Publication of EP0878571B1 publication Critical patent/EP0878571B1/fr
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D39/00—Pile-fabric looms
    • D03D39/22—Terry looms
    • D03D39/223—Cloth control

Definitions

  • the present invention relates generally to a pile fabric Weaving machine or loom (hereinafter also referred to simply as a loom) and more particularly to a weft insertion control apparatus for the pile fabric loom.
  • one unit of pile or unitary pile is formed by using two loosely picked wefts and one, two or three fast picked wefts.
  • Relative distance between a reed beating position for beating the fast picked weft and a cloth fell of a woven fabric remains the same as in the case of the beating in ground pattern weaving and border pattern weaving.
  • the relative distance between the beating position of the reed and the cloth fell of the woven fabric is increased.
  • a controller provided for changing the relative distance between the beating position and the cloth fell is adapted to be controlled by a control apparatus on the basis of reference pattern data.
  • JU-A-2-46883 a control function unit which is designed to output selectively a pile weaving signal or a border weaving signal on the basis of a pattern signal generated by a pattern signal generating unit.
  • JU-A-2-46883 a control function unit which is designed to output selectively a pile weaving signal or a border weaving signal on the basis of a pattern signal generated by a pattern signal generating unit.
  • an object of the present invention is provide a weft insertion control apparatus for a pile fabric weaving machine or loom which can identify whether a weft to be inserted is destined for a first loose picking, a second loose picking or a fast picking with high accuracy and without involving any appreciable difficulty.
  • a weft insertion control apparatus for a loom for weaving pile fabric by forming piles by changing a relative distance between a beating position of a reed and a cloth fell of a woven fabric
  • the weft insertion control apparatus includes a weft identifying means for identifying wefts destined for forming each unitary pile.
  • the weft identifying means includes a weaving pattern setting means incorporating a storage for storing weft sequence information concerning the wefts for forming each unitary pile in a state contained in pile weaving pattern information.
  • This sequence is represented by the weft sequence information.
  • the weft insertion control apparatus for the pile fabric weaving loom may further include a transmission command means for issuing a command for transmission of the weft sequence information, and an operation control means for controlling the weaving operation of the loom relating to the weft insertion in accordance with the weft sequence information.
  • the weaving pattern-setting means sends the weft sequence information to the operation control means, which responds thereto by controlling the weaving operation for the weft insertion in accordance with the weft sequence information.
  • the transmission command means may be so implemented as to include a rotation angle detecting means for detecting a rotation angle of the loom, wherein the transmission command means issues the command for causing the weaving pattern setting means to transmit the weft sequence information to the operation control means at the instant the rotation angle detecting means detects a predetermined rotation angle.
  • the operation control means performs the loom operation control in accordance with the rotation angle (or angular position) of the loom.
  • the detection information which is output from the rotation angle detecting means when the predetermined rotation angle is detected can be used for issuing the transmission command mentioned above.
  • the operation control means obtains the weft sequence information at the predetermined rotation angle every complete rotation to thereby control the weft inserting or picking operation.
  • the weaving pattern setting means may be so arranged as to include a weft information generation error detecting means for detecting errors in generation of the weaving pattern information.
  • a weft insertion control apparatus for a pile fabric loom which has a function or capability of stopping the loom at a predetermined stop position with high accuracy in order to facilitate processing when coping with an erroneous weft insertion.
  • a weft insertion control apparatus for a loom for weaving pile fabric by forming piles by changing the relative distance between a beating position of a reed and a cloth fell of a woven fabric
  • which apparatus includes a weft identifying means for identifying wefts destined for forming each unitary pile, a weaving pattern setting means provided in association with the weft identifying means and including a storage for storing weft sequence information concerning the wefts for forming each unitary pile in a state contained in pile weaving pattern information, a transmission command means for commanding transmission of the weft sequence information to an operation control means for controlling weaving operation relating to the weft insertion on the basis of the weft sequence information, a shedding load state detecting means provided in association with the weaving pattern setting means for detecting a shedding load state upon stopping of weaving operations, and a braking control factor storage means provided in association with the operation control means for storing braking control factors for
  • the preceding brake application control factor and the stop timing in a given previous shedding load state can be made use of for determining the brake application control factor upon stoppage of the weaving operation in a shedding load state corresponding or equivalent to the given previous shedding load state mentioned above. Needless to say, possibility of utilization of the data measured or acquired in the past is very effective for enhancing accuracy for stopping the loom operation steadily at a predetermined position.
  • a further object of the present invention is to provide a weft insertion control apparatus for a pile fabric loom which the apparatus is capable of preventing a generation or formation of a weaving bar even when the weaving operation is stopped in the course of beating operation for the fast picked weft.
  • a weft insertion control apparatus for a loom for weaving pile fabric by forming piles by changing a relative distance between a beating position of a reed and a cloth fell
  • the apparatus includes a weft identifying means for identifying wefts destined for forming each unitary pile, a weaving pattern setting means provided in association with the weft identifying means and including a storage for storing weft sequence information concerning the wefts for forming each unitary pile in a state contained in pile weaving pattern information on the basis of the weft sequence information, a transmission command means for commanding transmission of the weft sequence information to the operation control means for controlling weaving operation relating to the weft insertion, the operation control means including a distance changing means for changing distance between the reed and the cloth fell, and a distance change control means designed such that when a weft inserted immediately before the loom is stopped is identified as a fast picked weft
  • the distance change control means may further be designed so as to control the distance change means such that the distance between the first loosely picked weft and the cloth fell does not become shorter than the distance for the loose picking operation, before the pile is formed.
  • the distance change control means may be designed such that when a weft inserted immediately before the loom is stopped is identified as a fast picked weft on the basis of the information transferred from the weaving pattern setting means, the distance change control means advances timing for the stopping operation of the distance changing means relative to the stop timing in insertion of wefts of the unitary pile other than the fast picked weft.
  • the stop timing of the terry motion means is advanced by the distance change control means, whereby generation of weaving bar in the pile first formed upon restarting of the weaving operation can be prevented.
  • FIG. 1 is a side elevational view showing generally and schematically a structure of the loom.
  • a ground weaving warp beam 11 is driven by a delivery motor (not shown).
  • Ground weaving warps Tg fed out from the ground weaving warp beam 11 are guided by means of a back roller 12 and a tension roller 13 to pass through a heald 14 and a reed 15.
  • a woven fabric W is taken up by a cloth roller 20 via guide rollers 18 and 19 after undergoing treatment by an expansion bar 16 and a surface roller 17.
  • a pile weaving warp beam 21 is disposed above the ground weaving warp beam 11. Pile weaving warps Tp fed out from the pile weaving warp beam 21, being driven by a delivery motor (not shown) are caused to pass through the heald 14 and the reed 15 while being applied with tension by means of a tension roller 22.
  • An intermediate lever 23 is mounted rotatably or swingably on a supporting shaft 231 substantially at a center location of the loom as viewed in the longitudinal direction thereof. Further, a supporting lever 24 is mounted rotatably or swingably on a supporting shaft 241 at a rear portion of the loom, wherein the tension roller 22 mentioned above is supported on the supporting lever 24. The intermediate lever 23 and the supporting lever 24 are interlinked by means of a rod 25.
  • Another supporting lever 26 is mounted swingably on a supporting shaft 261 at a front portion of the loom, wherein the expansion bar 16 mentioned above is supported on the supporting lever 26. The supporting lever 26 and the intermediate lever 23 are interlinked by means of a rod 27.
  • the supporting levers 24 and 26 are caused to rotate or swing in a same rotational direction, whereby the tension roller 22 and the expansion bar 16 are caused to displace in a same direction for a same distance.
  • the path for the pile weaving warps Tp and the path for the woven fabric W are displaced correspondingly, being accompanied by displacement of a cloth fell W1 of the woven fabric W.
  • a supporting box 29 is disposed above the intermediate lever 23.
  • a terry motion motor 28 is fixedly mounted on the supporting box 29.
  • the terry motion motor 28 has an output shaft having a portion implemented in the form of a ball screw 281, wherein the output shaft of the terry motion motor 28 extends into the supporting box 29 so that the ball screw portion 281 is located within the supporting box 29.
  • a driven nut member 30 meshes with the ball screw portion 281 through the medium of balls (not shown)
  • the terry motion motor 28 is controlled by a terry motion controller C1 which constitutes an operation control means.
  • a supporting shaft 31 on which a direction switching lever 32 is mounted.
  • the direction switching lever 32 and the driven nut member 30 mentioned above are coupled to each other by means of a link 33. Further, the direction switching lever 32 is linked to the intermediate lever 23 by means of a rod 34. Consequently, reciprocative displacements of the driven nut member 30 taking place in accompanying forward/backward rotation of the ball screw portion 281 are transmitted to the expansion bar 16 by way of a displacement transmission mechanism which is constituted by the link 33, the direction switching lever 32, the rod 34, the intermediate lever 23, the rod 27 and the supporting lever 26, as a result of which the expansion bar 16 is caused to swing or displace angularly around the supporting shaft 261.
  • the expansion bar 16 is disposed at the terry-zero position indicated by a solid line in Fig. 1, whereas when the direction switching lever 32 is at a position indicated by a broken line in Fig. 1, the expansion bar 16 is disposed at the terry forming position indicated by a broken line in Fig. 1. Further, the reciprocative displacement of the driven nut member 30 is transmitted to the tension roller 22 by way of the intermediate lever 23, the rod 25 and the supporting lever 24.
  • a loom driving motor Mo for driving the reed 15 is controlled by the loom control computer Co (serving as a transmission command means, as described hereinafter).
  • a weaving pattern setting unit 35 which includes an input/output control circuit 40 and a storage unit 41, as shown in Fig. 2, wherein an input unit 42 is electrically connected to the input/output control circuit 40 of the weaving pattern setting unit 35 for inputting weaving pattern information, which information is then stored in the storage unit 41 under the control of the input/output control circuit 40.
  • the weaving pattern setting unit 35 supplies the weaving pattern information to the loom control computer Co which in turn transfers to the terry motion controller C1 the weaving pattern information received from the weaving pattern setting unit 35.
  • the terry motion controller C1 controls the operation of the terry motion motor 28 on the basis of the weaving pattern information obtained from the loom control computer Co.
  • the weaving pattern information contains a weaving pattern command on a pick-by-pick basis.
  • the weaving patterns there may be mentioned a pile weaving pattern G1(N), a ground weaving pattern G2 and a border weaving pattern G3.
  • the ground weaving pattern information for each pick contains only the ground weaving pattern command information "G2" with the border weaving pattern information for each pick similarly containing only the border weaving pattern command information "G3".
  • the pile weaving pattern information for each pick is composed of the combined information "G1(N), n" of pile weaving pattern command information "G1(N)" indicating the pile weaving and the weft sequence information "n".
  • the terry motion controller C1 is comprised of a storage unit 36, a control circuit 37 and a driving circuit 38.
  • the storage unit 36 is designed so as to store not only the position control data for the terry motion motor 28 but also to temporarily store the weaving pattern information transferred from the loom control computer Co.
  • the control circuit 37 outputs to the driving circuit 38 a control command on the basis of the weaving pattern information stored in the storage unit 36 and the rotation angle information supplied from a rotary encoder 39 provided for detecting the rotation angle (or angular position) of the loom.
  • the driving circuit 38 is designed so as to perform feedback control of the terry motion motor 28 on the basis of the control command supplied from the control circuit 37 and the rotation angle information supplied from a rotary encoder 282 incorporated in the terry motion motor 28 (also see Fig. 1)
  • the loom control computer Co is programmed to execute a weft identification control program illustrated in a flow chart of Fig. 3, while the weaving pattern setting unit 35 is programmed to execute the weft identification control program illustrated in the flow chart of Fig. 4.
  • the weft identification control procedure will be described by reference to the flow charts shown in Figs. 3 and 4.
  • the loom control computer Co Upon detection of a predetermined rotation angle ⁇ o by the rotary encoder 39 which is designed for detecting a loom rotation angle ⁇ (step S101), the loom control computer Co issues a weaving pattern request signal to the weaving pattern setting unit 35 (step S102). In response to the reception of the weaving pattern request signal in step S109, the input/output control circuit 40 of the weaving pattern setting unit 35 reads out the weaving pattern information stored in the storage unit 41 to thereby output the weaving pattern command information contained in the weaving pattern information to the loom control computer Co (step S110).
  • step S103 decision is made by the loom control computer Co as to whether the weaving pattern command information is the ground weaving pattern command information "G2", the border weaving pattern command information "G3" or the pile weaving pattern command information "G1(N)" in step S104.
  • the weaving pattern command information is either the ground weaving pattern command information "G2” or the border weaving pattern command information "G3”
  • the loom control computer Co transfers the weaving pattern command information (i.e., either the information "G2" or "G3") to the terry motion controller C1 (step S105) and then waits for succeeding detection of the predetermined rotation angle ⁇ o of the loom.
  • the terry motion controller C1 temporarily stores the weaving pattern command information (i.e., "G2" or "G3") sent from the loom control computer Co in the storage unit 36.
  • the weaving pattern command information i.e., "G2” or "G3”
  • the terry motion controller C1 controls operation of the terry motion motor 28 such that the expansion bar 16 is positioned at the terry-zero position on the basis of the weaving pattern command information, i.e., ground weaving pattern command information "G2" or border weaving pattern command information "G3".
  • the loom control computer Co stores the pile weaving pattern command information "G1(N)", while issuing a weft sequence request signal to the weaving pattern setting unit 35 (in a step S106).
  • the input/output control circuit 40 of the weaving pattern setting unit 35 reads out the pile weaving pattern information stored in the storage unit 41 to thereby output the weft sequence information "n" contained in the weaving pattern information to the loom control computer Co (step S112).
  • the loom control computer Co transfers a combination of the pile weaving pattern command information "G1(N)” and the weft sequence information "n” to the terry motion controller C1 in a step S108 and then waits for succeeding detection of the predetermined rotation angle ⁇ o of the loom. In that case, the terry motion controller C1 temporarily stores the pile weaving pattern command information "G1(N)” and the weft sequence information "n” which are sent from the loom control computer Co in the storage unit 36.
  • the pile weaving pattern command information "G1(N)" and the weft sequence information "n” are used to control the operation of the terry motion motor 28 after two rotations of the loom from the instant at which the predetermined rotation angle ⁇ o mentioned previously is detected. More specifically, the terry motion controller C1 controls operation of the terry motion motor 28 such that the expansion bar 16 is positioned at the terry-zero position or the terry forming position on the basis of the pile weaving pattern command information "G1(N)" and the weft sequence information "n".
  • the terry motion controller C1 controls the operation of the terry motion motor 28 so that the expansion bar 16 can be positioned at the terry forming position, whereas when n equals "3", "4" or "5", the terry motion controller C1 controls the operation of the terry motion motor 28 so that the expansion bar 16 is positioned at the terry-zero position.
  • Table 1 indicates, by way of example only, normal and abnormal weaving pattern command information and weft sequence information.
  • the weft information generation error detecting unit 43 serving as a weft information weft information generation error detecting means performs detection of the generation error or failure in the weaving pattern information in accordance with a weft information generation error detecting program illustrated in a flow chart in Fig. 6.
  • the loom control computer Co outputs the weaving pattern information to both the terry motion controller C1 and the weft information generation error detecting unit 43.
  • the terry motion controller C1 performs control similar to the case of the first embodiment on the basis of the weaving pattern information, while the weft information generation error detecting unit 43 detects the weft information generation error of the weaving pattern information in accordance with the weft information generation error detection program illustrated in Fig. 6.
  • the weft information generation error detecting unit 43 issues a weaving stop signal (step S207) and at the same time causes the display unit 44 to display that an abnormality occurred (step S208), which results in the loom control computer Co stopping the weaving operation in response to the input of the weaving stop signal.
  • weft information generation error detecting unit 43 may be arranged so as to detect normalities and abnormalities in the weaving pattern command information and the weft sequence information as listed in Table 2 below.
  • the weft information generation error detecting unit 43 serving as the weft information generation error detecting means performs a detection procedure for detecting the generation or occurrence of an error or failure in the weaving pattern information in accordance with the weft information generation error detecting program.
  • the preceding weaving pattern information and the current weaving pattern information contain the pile weaving pattern G1(3) and "n" of the current weft sequence information is equal to "1" with "n" of the preceding weft sequence information being "3”
  • the weft information generation error detecting unit 43 issues a weaving stop signal (step S207) and at the same time causes the display unit 44 to display the occurrence of an abnormality (step S208), which results in the loom control computer Co stopping the weaving operation in response to the input of the weaving stop signal.
  • the weft information generation error detecting unit 43 can alternatively be so designed as to detect the weft information generation error before the weaving operation is started.
  • FIGs. 7 to 10 illustrate in flow charts a stop control program executed by the loom control computer Co incorporated in the weft insertion control apparatus for a pile fabric weaving according to the third embodiment of the present invention. Now, referring to Figs. 7 to 10, the control procedure for stopping the loom driving motor Mo will be described.
  • step S301 When a weaving stop signal such as mentioned hereinbefore is input (step S301), the control circuit 37 of the terry motion controller C1 determines the type of weaving pattern on the basis of the weaving pattern information containing the weft sequence information which is obtained from the weaving pattern setting unit 35 by way of the loom control computer Co (step S301 in Fig. 7).
  • the control circuit 37 reads out from the storage unit 36 a braking start angle ⁇ 4 (So) and a stop angle ⁇ 4(Eo) for the wefts in the preceding weaving pattern except for the pile weaving pattern, to thereby arithmetically determine or calculate a braking start angle ⁇ 4(S) on the basis of the braking start angle ⁇ 4 (So) and the stop angle ⁇ 4(Eo) in a step S320 shown in Fig. 9.
  • the calculation method disclosed for example, in Japanese Patent Application Laid-open No. 176242/1982 (JP-A-57-176242) may be adopted.
  • the control circuit 37 issues a braking start command signal, whereby braking is applied to the loom driving motor Mo, starting from the time point mentioned above (step S322 in Fig. 10).
  • the rotation speed of the loom driving motor Mo is detected by the control circuit 37 on the basis of the loom rotation angle information available from the output of the rotary encoder 39.
  • the control circuit 37 reads out from the storage unit 36 a braking start angle ⁇ 1(So) and a stop angle ⁇ 1(Eo) for the first loosely picked weft in the preceding pile weaving pattern, to thereby arithmetically determine or calculate a braking start angle ⁇ 1(S) on the basis of the braking start angle ⁇ 1(So) and the stop angle ⁇ 1(Eo) in a step S304 shown in Fig. 7.
  • the control circuit 37 issues the braking start command signal (step S306 in Fig. 7), whereby braking is applied to the loom driving motor Mo, starting from the time point mentioned above.
  • the control circuit 37 reads out from the storage unit 36 a braking start angle ⁇ 2(So) and a stop angle ⁇ 2(Eo) for the second loosely picked weft in the preceding pile weaving pattern, to thereby calculate a braking start angle ⁇ 2(S) on the basis of the braking start angle ⁇ 2(So) and the stop angle ⁇ 2(Eo) in a step S310 shown in Fig. 8.
  • the loom rotation angle ⁇ detected by the rotary encoder 39 coincides with the braking start angle ⁇ 2(S) in a step S311 in Fig.
  • the control circuit 37 issues the braking start command signal, whereby brake is applied to the loom driving motor Mo, starting from the time point mentioned above in step S312 in Fig. 8.
  • the control circuit 37 reads out from the storage unit 36 a braking start angle ⁇ 3(So) and a stop angle ⁇ 3(Eo) for the fast picked weft in the preceding pile weaving pattern, to thereby determine or calculate a braking start angle ⁇ 3(S), on the basis of the braking start angle ⁇ 3(So) and the stop angle ⁇ 3(Eo) in a step S315 shown in Fig. 9.
  • the control circuit 37 issues the braking start command signal, whereby brake is applied to the loom driving motor Mo, starting from the above-mentioned time point (step S317 in Fig. 9).
  • the loom control computer Co In response to the input of the weaving start signal after having stored the stop angle and the braking start angle, the loom control computer Co starts operation of the loom driving motor Mo to allow the weaving operation to be restarted.
  • control apparatus for a pile fabric weaving machine brings about advantageous effects below.
  • a fourth embodiment of the invention which is directed to a control procedure for preventing formation or occurrence of a weaving bar (also known as a weft bar or filling bar).
  • a weaving bar also known as a weft bar or filling bar.
  • a unitary pile P is constituted by a first loosely picked weft Y2, a second loosely picked weft Y3 and a fast picked weft Y1.
  • Figure 15A shows a situation where the second loosely picked weft Y3 is beaten by the reed 15 at a predetermined position K1 when the second loosely picked weft Y3 suffers insertion failure and when the loom stops at a predetermined rotation angle.
  • Fig. 15A shows a situation where the second loosely picked weft Y3 is beaten by the reed 15 at a predetermined position K1 when the second loosely picked weft Y3 suffers insertion failure and when the loom stops at a predetermined rotation angle.
  • the loom control computer Co and the terry motion controller C1 have acquired the information concerning the rotation angle of the loom on the basis of the loom rotation angle information derived from the output of the rotary encoder 39.
  • the terry motion controller C1 performs synchronization control for synchronizing the terry motion motor 28 with the rotation of the loom on the basis of the loom rotation angle information derived from the output of the rotary encoder 39.
  • the loom control computer Co acquires information of the weft insertion failure at a loom rotation angle ⁇ m (see Fig. 13).
  • the curve E shown in Fig. 13 represents a pattern of rotation position of the terry motion motor 28 in the operation for weaving a three-weft towel texture.
  • the loom rotation angle 0° represents the beating time point or timing.
  • the rotational or angular position ⁇ o corresponds to the terry-zero position in front of the cloth fell W1 while rotational position ⁇ 1 corresponds to the terry forming position in front of the cloth fell W1.
  • the loom control computer Co makes a determination on the basis of the weft sequence information contained in the weaving pattern information as to whether or not the weft suffering the insertion failure is the second loosely picked weft in a step S402 shown in Fig. 11. Unless the weft suffering the insertion failure is the second loosely picked weft (i.e., when the decision step S402 results in "NO"), the loom control computer Co outputs a synchronization control stop command signal to the terry motion controller C1 (step S407 in Fig. 11). When the rotation angle of the loom coincides with the predetermined rotation angle ⁇ o, the loom control computer Co outputs an operation stop command to the loom driving motor Mo.
  • braking is applied to the loom driving motor Mo to stop the rotation thereof (step S408 in Fig. 11).
  • rotation of the loom driving motor Mo is stopped substantially at a time point corresponding to a loom rotation angle ⁇ s. As a result, the fast picking of the weft is inhibited or prevented.
  • the terry motion controller C1 responds to reception of the synchronization control stop command signal to stop operation of the terry motion motor 28. In that case, the terry motion controller C1 synchronizes the stop of operation of the terry motion motor 28 with the stop of the loom driving motor Mo on the basis of the loom rotation angle information derived from the output of the rotary encoder 39. Thus, the terry motion motor 28 is caused to stop at a rotational position ⁇ s corresponding to the loom rotation angle ⁇ s.
  • the loom control computer Co rotates reversely the loom driving motor Mo for a predetermined angular distance at a low speed (step S409 shown in Fig. 11). Consequently, the loom rotates in the reverse or backward direction about one and a half turns to stop at the loom rotation angle ⁇ 1 (see Fig. 13). In that case, the reed 15 assumes a maximum retracted position remote from the cloth fell W1 of the woven fabric W at maximum, whereby the shedding defined by warps is set to a maximum degree for allowing the weft suffering the insertion failure to be removed.
  • a starting switch 45 is turned on (step S410 in Fig. 11).
  • the loom control computer Co responds to the weaving operation start signal generated upon closing of the starting switch 45 to output the synchronization control start signal to the terry motion controller C1 in a step S411 while restarting the weaving operation by activating the loom driving motor Mo.
  • the terry motion controller C1 restarts the synchronization control described hereinbefore in response to reception of the synchronization control start signal (step S412 in Fig. 11).
  • the loom control computer Co issues a forcive stop command signal to the terry motion controller C1 in a step S403 shown in Fig. 11.
  • the loom control computer Co issues an operation stop command for the loom driving motor Mo (step S405).
  • braking is applied to the loom driving motor Mo to stop the rotation thereof.
  • the terry motion controller C1 responds to reception of the forced control stop command signal to forcibly stop the operation of the terry motion motor 28 (steps S421 and S422 in Fig. 12). In that case, the terry motion controller C1 immediately stops without synchronizing the stop of operation of the terry motion motor 28 with that of the loom.
  • the terry motion motor 28 may stop, for example, at a rotational position indicated by ⁇ in Fig. 13. With such rotational position, the expansion bars 16 stops, for example, at a position slightly closer to the reed 15 than the terry forming position as indicated by broken line in Fig. 1, and the cloth fell W1 of the woven fabric W also stops at a position slightly closer to the reed 15 than the terry forming position, as indicated by the broken line in Fig. 1.
  • the loom control computer Co reversely rotates the loom driving motor Mo for a predetermined angular distance at a low speed (step S405 in Fig. 11). Due to such slow reverse rotation, the reed 15 is displaced to the maximum retracted position mentioned previously, whereby the shedding is set to maximum for allowing the weft suffering the insertion failure to be removed.
  • the loom control computer Co issues a forced-stop clearing signal to the terry motion controller C1 (step S406).
  • the terry motion controller C1 responds to the reception of the forced-stop clearing command signal in a step S423 shown in Fig. 12 to thereby correct the rotational position of the terry motion motor 28 so that it matches with the rotation angle ⁇ 1 of the loom in a step S424 shown in Fig. 12.
  • the start switch 45 After removal of the weft suffering the insertion failure from the shedding, the start switch 45 is turned on (step S410 in Fig. 11).
  • the loom control computer Co responds to the weaving operation start signal generated upon closing of the start switch 45 to thereby output the synchronization control start signal to the terry motion controller C1 (step S411) while restarting the weaving operation by activating the loom driving motor Mo (step S412).
  • the terry motion controller C1 restarts the synchronization control described hereinbefore in a step S428 shown in Fig. 12 in response to the reception of the synchronization control start signal (step S427 in Fig. 12).
  • the weft identifying apparatus for the pile fabric weaving according to the fourth embodiment of the invention provides the advantageous effects mentioned below.
  • reference numeral 61 denotes a feeding rapier head adapted to be inserted into a shedding formed by warps from a weft insertion starting side
  • numeral 62 denotes a receiving rapier head adapted to be inserted into the shedding from a weft insertion terminal side.
  • the rapier heads 61 and 62 are fixedly secured to rapier bands 63 and 64 at tip end portions thereof, respectively.
  • the rapier bands 63 and 64 are wound respectively around sprocket wheels 65 and 66, which are rotated reciprocatively in directions opposite to each other.
  • the feeding rapier head 61 is inserted into the shedding by rotating the sprocket wheel 65 in the forward direction while the feeding rapier head 61 is retracted or withdrawn from the shedding when the sprocket wheel 65 rotates in the backward direction.
  • the receiving rapier head 62 is inserted into the shedding upon forward rotation of the sprocket wheel 66 while being retracted from the shedding when the sprocket wheel 66 rotates in the backward direction.
  • a sley 47 is supported on the rocking shaft 48.
  • the sley 47 is designed to rotate around the rocking shaft 48 together with it.
  • a driving shaft 49 is rotatably mounted immediately beneath the rocking shaft 48.
  • the driving shaft 49 is adapted to be driven by a beating motor 50.
  • Double cams 51 and 52 are fixedly mounted on the driving shaft 49 at both end portions thereof, respectively, while double cam levers 53 and 54 are secured to the rocking shaft 48 at both end portions thereof, respectively.
  • Rotating motion of the driving shaft 49 is translated into reciprocative motion of the rocking shaft 48 by means of a positive cam mechanism constituted by the double cams 51 and 52 through cooperation with the double cam levers 53 and 54.
  • the sley 47 Upon reciprocative angular displacement of the rocking shaft 48, the sley 47 is caused to swing reciprocatively, i.e., forwardly and backwardly, whereby beating operation by the read 60 is realized.
  • three-dimensional crank mechanisms 55 and 56 are disposed at both ends of the driving shaft 49, respectively. Rotation of the driving shaft 49 is translated into reciprocative rotations of the sprocket wheels 65 and 66 through the medium of the three-dimensional crank mechanisms 55 and 56, respectively.
  • the reciprocative rotation of the sprocket wheels 65 and 66 are transmitted to the rapier bands 63 and 64, respectively, whereby the rapier bands 63 and 64 are caused to move reciprocatively, respectively. Owing to the reciprocative motions of the rapier bands 63 and 64, the rapier heads 61 and 62 are caused to travel into and from the shedding, respectively.
  • the three-dimensional crank mechanisms 55 and 56 are implemented symmetrically to each other with reference to a vertical center line of the loom, as viewed in Fig. 14.
  • the sprocket wheels 65 and 66 which are disposed at left- and right-hand sides of the loom, as viewed in Fig. 14, are caused to rotate in the directions reverse to each other.
  • both the rapier heads 61 and 62 can move into the shedding synchronously with each other to meet at a center position, as viewed in the direction widthwise of the fabric. Thereafter, the rapier heads 61 and 62 are retracted from the shedding. The weft Y inserted into and carried through the shedding by means of the feeding rapier head 61 is transferred to the receiving rapier head 62. The receiving rapier head 62 is then retracted from the shedding, whereby the weft Y can extend through the shedding completely.
  • the beating motor 50 constituting the distance change means is subjected to the control of a beating control unit 57 which constitutes or serves as the distance change control means. More specifically, the beating control unit 57 controls the beating motor 50 on the basis of the loom rotation angle information derived from the output of the rotary encoder 39 so that the synchronization is established for the beating operation. Further, the beating control unit 57 performs feedback control of the beating motor 50 on the basis of the rotation angle information derived from the output of a rotary encoder 501 which is incorporated in the beating motor 50.
  • the loom control computer Co Upon occurrence of insertion failure in the second loosely picked weft, the loom control computer Co issues a forced stop command signal to the beating control unit 57 which responds to that signal by forcibly stopping the beating motor 50. Owing to this forced stoppage of the beating motor 50, the distance between the cloth fell W1 and the first loosely picked weft preceding to the second loosely picked weft suffering the insertion failure is prevented from becoming shorter than the predetermined distance. Thus, the formation of a weaving bar representing a defective pile formation which is ascribable to decreasing of the distance between the first loosely picked weft and the cloth fell W1 below a predetermined distance can be satisfactorily avoided.
  • weft identifying apparatus for the pile fabric weaving according to the present invention may also be modified as mentioned below.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP19980105291 1997-05-14 1998-03-24 Dispositif de contrôle de l'insertion de trame avec installation pour l'identification de la trame pour métier à poil Expired - Lifetime EP0878571B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP12417597 1997-05-14
JP12417597A JPH10317254A (ja) 1997-05-14 1997-05-14 パイル織機における緯糸認識装置
JP124175/97 1997-05-14

Publications (2)

Publication Number Publication Date
EP0878571A1 true EP0878571A1 (fr) 1998-11-18
EP0878571B1 EP0878571B1 (fr) 2003-05-28

Family

ID=14878834

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980105291 Expired - Lifetime EP0878571B1 (fr) 1997-05-14 1998-03-24 Dispositif de contrôle de l'insertion de trame avec installation pour l'identification de la trame pour métier à poil

Country Status (3)

Country Link
EP (1) EP0878571B1 (fr)
JP (1) JPH10317254A (fr)
DE (1) DE69814982T2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1657332A2 (fr) * 2004-11-16 2006-05-17 Tsudakoma Kogyo Kabushiki Kaisha Système d'entraînement des membres de formation de boucles dans un métier pour tissu éponge du type à toile mobile
EP1662029A3 (fr) * 2004-11-25 2007-08-01 Tsudakoma Kogyo Kabushiki Kaisha Procédé d'entraînement des membres de formation de boucles dans un métier pour tissu éponge du type à toile mobile
EP1876272A1 (fr) * 2006-07-06 2008-01-09 Tsudakoma Kogyo Kabushiki Kaisha Dispositif d'édition des dessins de tissu pour métier à tisser pour tissus à poil
CN103437045A (zh) * 2013-08-27 2013-12-11 山东日发纺织机械有限公司 一种毛巾织机起圈控制装置
CN111455528A (zh) * 2019-01-22 2020-07-28 津田驹工业株式会社 绒头织机的启动限制方法及装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3213935A1 (de) * 1981-04-18 1982-10-28 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, Aichi Verfahren zur positionssteuerung hinsichtlich einer vorgegebenen stop-position bei einem webstuhl
EP0257857A2 (fr) * 1986-08-04 1988-03-02 West Point-Pepperell, Inc. Dispositif de contrôle du rapport des boucles peluches
DE4432452A1 (de) * 1993-09-13 1995-03-23 Toyoda Automatic Loom Works Verfahren zur Florbildung und Vorrichtung für eine Florgewebewebmaschine
EP0648875A1 (fr) * 1993-10-14 1995-04-19 Sulzer RàœTi Ag Dispositif de contrôle de la frappe du peigne pour métier à tisser
EP0682131A1 (fr) * 1994-05-10 1995-11-15 Sulzer RàœTi Ag Méthode pour régler le mouvement du relâchement de la chaîne de poil et machine pour tissu éponge pour réaliser la dite méthode

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3213935A1 (de) * 1981-04-18 1982-10-28 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, Aichi Verfahren zur positionssteuerung hinsichtlich einer vorgegebenen stop-position bei einem webstuhl
EP0257857A2 (fr) * 1986-08-04 1988-03-02 West Point-Pepperell, Inc. Dispositif de contrôle du rapport des boucles peluches
DE4432452A1 (de) * 1993-09-13 1995-03-23 Toyoda Automatic Loom Works Verfahren zur Florbildung und Vorrichtung für eine Florgewebewebmaschine
EP0648875A1 (fr) * 1993-10-14 1995-04-19 Sulzer RàœTi Ag Dispositif de contrôle de la frappe du peigne pour métier à tisser
EP0682131A1 (fr) * 1994-05-10 1995-11-15 Sulzer RàœTi Ag Méthode pour régler le mouvement du relâchement de la chaîne de poil et machine pour tissu éponge pour réaliser la dite méthode

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1657332A2 (fr) * 2004-11-16 2006-05-17 Tsudakoma Kogyo Kabushiki Kaisha Système d'entraînement des membres de formation de boucles dans un métier pour tissu éponge du type à toile mobile
EP1657332A3 (fr) * 2004-11-16 2007-05-30 Tsudakoma Kogyo Kabushiki Kaisha Système d'entraînement des membres de formation de boucles dans un métier pour tissu éponge du type à toile mobile
EP1662029A3 (fr) * 2004-11-25 2007-08-01 Tsudakoma Kogyo Kabushiki Kaisha Procédé d'entraînement des membres de formation de boucles dans un métier pour tissu éponge du type à toile mobile
EP1876272A1 (fr) * 2006-07-06 2008-01-09 Tsudakoma Kogyo Kabushiki Kaisha Dispositif d'édition des dessins de tissu pour métier à tisser pour tissus à poil
CN103437045A (zh) * 2013-08-27 2013-12-11 山东日发纺织机械有限公司 一种毛巾织机起圈控制装置
CN111455528A (zh) * 2019-01-22 2020-07-28 津田驹工业株式会社 绒头织机的启动限制方法及装置

Also Published As

Publication number Publication date
JPH10317254A (ja) 1998-12-02
DE69814982T2 (de) 2004-02-26
EP0878571B1 (fr) 2003-05-28
DE69814982D1 (de) 2003-07-03

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