KR19990062750A - Weft Holding Device Of Loom - Google Patents

Abstract

Provides a weaving gripping device of the loom that can remove the wrong thread into the weft.

The drive pivot 36 is fixed to the roller shaft 241 of the press roller 24 which holds the woven fabric W in cooperation with the surface roller 23. The driven rotating body 37 is supported by the support shaft 29 so that rotation is possible. As the press roller 24 rotates, the driven rotating body 37 rotates in the opposite direction to the press roller 24. The drive timing pulley 40 is supported by the support shaft 29 so that rotation is possible. The driving timing pulley 40 and the driven rotating body 37 are integrally coupled to each other. The timing belt 43 crosses the driven timing pulley 42 and the drive timing pulley 40 fixed to the support shaft 41. A gripping rotator 44 is fixed to one end of the support shaft 41. A fixed gripping body 45 is disposed directly below the gripping rotating body 44.

Description

Weft Holding Device Of Loom

The present invention relates to a weft holding device of a loom.

When weft dense fabrics, such as glass fabrics, are woven into a shuttleless loom, such as a jet loom, the tissue immediately after weaving is likely to loosen. Therefore, as disclosed in Japanese Utility Model Application Laid-open No. 1-119080 and Japanese Patent Application Laid-open No. 2-118141, It is necessary to grip the end of the weft near the cloth fell at the end of the fabric, which is not formed by the yarn. Japanese Patent Application Laid-Open No. Hei 1-119080 discloses an apparatus for gripping the end of a weft thread between an upper surface of a fixed knife for cutting the weft thread and a wire spring. Japanese Patent Laid-Open No. 2-118141 discloses an apparatus for gripping an end of a weft thread by an air chuck.

However, in the apparatus described in Japanese Utility Model Laid-Open No. 1-119080, the woven fabric is moved. However, since the end of the weft is held by the fixed spring and the fixed knife, the weft under the grip is strongly pulled in the opposite direction to the direction of movement of the fabric. This pulling action in the reverse direction may disrupt the tissue near the front of the fabric.

In the apparatus described in Japanese Patent Laid-Open No. 2-118141, the grip of the end of the weft by the air chuck is performed at a position as far as possible from the front of the fabric. When the air chuck device is applied to hold the end of the weft near the front of the fabric, the holding of the end of the weft by the air chuck is performed during the rest of the pulling operation of the fabric. Therefore, the same problem as that occurring in the apparatus described in Japanese Utility Model Laid-Open No. 1-119080 does not occur. However, such gripping mechanisms cannot be applied only to looms with a woven fabric pulling mechanism that intermittently pulls the fabric.

Weft holding devices that can avoid the problems caused by the devices described in Japanese Utility Model Laid-Open No. Hei 1-119080 and Japanese Patent Laid-Open No. Hei 2-118141 have been devised. This weft gripping apparatus uses at least one of a pair of gripping members holding the end of the weft as a rotating body to rotate in accordance with the movement of the fabric. It is configured to send actively in the moving direction. In this weft holding device, the rotational driving force of the rotating body is obtained by a body beating means. That is, the reciprocating motion of the sleigh supporting the body is transmitted to the rotating body via a one-way clutch. Therefore, this rotor rotates only intermittently in one direction.

On the other hand, if a weft error occurs, the weft error must be removed from the fabric. For this reason, it is necessary to reverse the loom to free the error chamber from the grip of the warp.

However, in the weft holding device of the structure which transmits the reciprocating rocking motion of a slay to a rotating body via the one-way clutch mentioned above, a rotating body cannot be reversely rotated. Therefore, it is difficult to remove the error chamber gripped between the rotating body and the other holding body before weaving the fabric. In particular, in the weft processing apparatus for automatically removing the error chamber, it is difficult to remove the error chamber held between the rotating body and the other gripper.

Accordingly, an object of the present invention is to provide a weft gripping apparatus capable of removing a mistaken error chamber of a weft to solve the above problems.

For this reason, the present invention is to rotate the gripping rotator holding the end of the weft near the front of the fabric of the woven fabric in accordance with the moving speed of the woven fabric, and to hold the weft held between the gripping rotator and another gripping body It aims at the weft holding device of the loom which sends an edge part to the moving direction of a woven fabric by rotation of a holding | gripping tool. According to a main feature of the present invention, there is provided a forward rotation drive means for normal rotation of the gripping rotator in accordance with the weaving movement of the woven fabric, and a reverse rotation drive means for reverse rotation of the gripping rotator. One weft gripping device constitutes.

The forward rotation drive means rotates the gripping rotator forwardly, and the gripping rotator rotates forward in accordance with the weaving movement of the woven fabric. The end of the weft gripped by the gripping rotator and another gripping member is sent in the direction of the weaving movement. When the weft error occurs, the reverse rotation drive means reversely rotates the gripping rotator. Thus, the error chamber held between the gripping rotator and the other gripping body is sent in the direction of returning the woven fabric, and as a result, the error chamber is released from the gripping action between the gripping rotator and the other gripping body.

According to another feature of the invention, at least one of the forward rotation drive means and the reverse rotation drive means also serves as a woven handling means. When this woven fabric handling means is comprised by a forward rotation drive means or a reverse rotation drive means, the structure of the whole apparatus becomes simple.

According to another feature of the invention, the forward rotation drive means and the reverse rotation drive means are constituted by a press roller constituting a woven fabric pulling means together with a surface roller.

The circumferential speed of the press roller that pulls the woven fabric in cooperation with the surface roller is the woven cloth moving speed, and the press roller which rotates at the same main speed as the woven cloth moving speed is suitable as a forward rotation drive means and a reverse rotation drive means for rotating the gripping rotator. do.

According to another feature of the present invention, a drive rotary body integrally rotating with the press roller, a lever supporting the press roller, a support shaft supporting the lever, and a support shaft supported by the support shaft, A driven rotating body that obtains a driving force, a driving transmission body integrally rotating with the driven rotating body, a driven transmission body integrally rotating with the gripping rotation body, and a linear body transmitting the rotation of the driving transmission body to the driven transmission body ( A driving force transmission means having a line is configured.

The rotation of the press roller is transmitted to the gripping rotator via the drive rotator, driven rotator, drive transmission body, shipboard body and driven transmission body. When the woven fabric is peeled between the surface roller and the press roller at the time of warping the loom (exchange of warp beam), the press roller is rotated about the support shaft and the press roller is separated from the surface roller. However, even with this operation, the rotational trajectory of the ship body does not change, and the ship body is not stretched due to excessive tension applied to the ship body, or the tension acting on the ship body is lessened.

According to another feature of the present invention, the weft gripping apparatus has a linear belt and is provided with tension increasing means for increasing the tension of the timing belt than the tension during weaving.

If the tension of the timing belt is increased by the tension increasing means before the reverse rotation of the press roller, the backlash between the drive transmission body and the driven transmission body and the timing belt is eliminated, and the start of the reverse rotation of the holding rotation body is delayed. none.

According to another feature of the present invention, the weft gripping device includes independent reverse rotation drive means for reversely rotating the gripping rotator independently of the loom drive motor.

The independent reverse rotation drive means reversely rotates the gripping rotator when weft error occurs. Since the independent reverse rotation drive means is independent of the loom drive motor, the independent reverse rotation drive means releases the error chamber held between the gripping rotation body and the gripping body from the gripping action between the gripping rotation body and the gripping body. The amount of reverse rotation of the gripping rotor can be set. Therefore, the error chamber is reliably released from the gripping action between the gripping rotator and the gripping body.

According to another feature of the present invention, the reverse rotation drive means from the independent reverse rotation drive means independent of the interlock reverse rotation drive means and the interlock reverse rotation drive means for reverse rotation of the gripping rotating body in conjunction with the reverse rotation of the loom drive motor. The forward rotation drive means is interlocked with the loom drive motor to serve as the interlock reverse rotation drive means.

When the weft density is large, since the moving speed of the woven fabric is small, the reverse rotation amount of the gripping rotator by only the interlocking reverse rotation driving means which also serves as the forward rotation driving means is small even when the loom driving mother reverses the rotation for the error chamber processing. On the other hand, since the independent reverse rotation drive means is independent of the loom driving motor, the error chamber gripped between the gripping rotor and the other gripper is independently reversed so as to be freed from the gripping action between the gripper and the other gripper. The amount of reverse rotation of the gripping rotator by the drive means can be set. Therefore, the error chamber is reliably released from the gripping action between the gripping rotator and the gripping body.

According to another feature of the present invention, the interlocking reverse rotation driving means includes a linear body which transmits the rotational driving force of the loom driving motor to the gripping rotating body, and the independent reverse rotating driving means changes the path of the linear body to hold the gripping rotating body. And rerouting means for reverse rotation.

At the time of weaving, the interlocking reverse rotation driving means, which also serves as the forward rotation driving means, rotates the gripping rotation body forward through the ship body. In the case of reverse rotation of the loom driving motor for the error chamber processing, the interlocking reverse rotation driving means reversely rotates the gripping rotation body via the linear body. The path changing means changes the path of the ship body and reversely rotates the gripping rotator. The reverse rotation amount of the gripping rotation body by the independent reverse rotation driving means can be set such that the error chamber held between the gripping rotation body and the other gripping body is released from the gripping action between the gripping rotation body and the other gripping body. Therefore, the error chamber is reliably released from the gripping action between the gripping rotator and the other gripping body.

According to another feature of the present invention, the path changing means includes a tension imparting roller which imparts tension to the linear body, an elastic force imparting means for imparting elastic pressing force to the linear body via the tension imparting roller, and an action of the elastic force imparting means. And a tension adding means for adding a tension to the linear body in the direction of rotating the grip rotational body against.

In the error chamber processing, the tension adding means adds tension to the ship body to change the path of the ship body. Due to the reverse rotation of the gripping rotator due to this path change, the error chamber is reliably released from the gripping action between the gripping rotator and another gripping body.

According to another feature of the present invention, the tension adding means is configured to include a tension adder for adding tension to the linear body and a fluid pressure cylinder for driving the tension adder.

The hydraulic cylinder is suitable as a component of the tension adding means.

According to another feature of the invention, the tensioning roller is connected to the tension adder and the fluid pressure cylinder has a return spring that acts on the tension adder against the fluid pressure acting on the tension adder. The spring also serves as an elastic pressing force applying means.

The return spring applies tension to the ship body via the tension applying roller, while the fluid pressure supplied to the fluid pressure cylinder adds tension to the ship body via the tension adder. By the addition of the tension, the path of the ship body is changed, and the reverse rotation of the gripping rotator by the change of the path reliably releases the error chamber from the gripping action between the gripping rotator and the other gripping body.

According to another feature of the present invention, the reverse rotation drive means is configured to include a reverse rotation amount increasing means for interlocking with the loom drive motor and increasing the reverse rotation amount of the gripping rotation body.

In the reverse rotation of the loom, the amount of rotation of the gripping rotator is larger than the amount of rotation of the gripping rotator at the forward rotation of the loom, and the error chamber is reliably released from the gripping action between the gripping rotator and the other gripping body.

According to another feature of the present invention, the weft gripping apparatus is provided with a gripping action canceling means for eliminating the gripping action by the gripping rotator and another gripping body by separating the gripping rotator from another gripping body.

If the gripping action is eliminated by removing the gripping rotating body and the other gripping body, the error chamber treatment is surely performed.

BRIEF DESCRIPTION OF THE DRAWINGS The side view which shows the principal part of 1st Embodiment of the weft holding device of the loom which concerns on this invention.

FIG. 2 is a plan view showing a main part of the first embodiment shown in FIG. 1. FIG.

3 is a side view showing a main part of a second embodiment of a weft holding device for a loom according to the present invention;

It is a side view which shows the principal part of 3rd Embodiment of the weft holding device of the loom which concerns on this invention.

The side view which shows the principal part of 4th Embodiment of the weft holding device of the loom which concerns on this invention.

It is a side view which shows the principal part of 5th Embodiment of the weft holding device of the loom which concerns on this invention.

FIG. 7 is a plan view illustrating a main part of the fifth embodiment shown in FIG. 6. FIG.

Fig. 8 is an enlarged side view of a partially broken main part showing a state in which the gripping rotor is rotated in reverse;

Fig. 9 is a partially broken enlarged side view showing the main part of a sixth embodiment of a weft holding device in a loom according to the present invention;

Fig. 10 is a partially broken enlarged side view showing the main part of a seventh embodiment of a weft holding device for a loom according to the present invention;

Fig. 11 is a partially broken enlarged side view showing the main part of an eighth embodiment of a weft holding device for a loom according to the present invention;

FIG. 12 is a plan view showing a main part of an eighth embodiment shown in FIG. 11. FIG.

Explanation of symbols on the main parts of the drawings

24: press roller 27: lever

36: drive rotating body 43: timing belt

52: air cylinder 54: tension portion roller

66: press roller 67: driven timing pulley

Example 1

Next, 1st Embodiment which actualized this invention in the jet room is demonstrated based on FIG. 1 and FIG.

As shown in FIG. 2, a main nozzle 12 for wefting is provided on the slay 11, and the weft Y is sprayed by a spraying action of the main nozzle 12 for wefting. It is injected into the opening of T). The deformable body 14 is installed upright in the slay 11. The weft yarn Y injected into the opening of the warp yarn T is a weft yarn in front of the deformation body 14 by a relay injection of a plurality of weft auxiliary auxiliary nozzles 13 (only one is shown in the drawing). Fly inside the passage 141 (blow / pass). A weft containment nozzle 15 is provided just below the injection path of the main nozzle 12 for wefting. The injection direction of the weft containment nozzle 15 intersects the injection path of the weft containment main nozzle 12. Weft main nozzle 12, weft auxiliary nozzle 13 and weft containment nozzle 15 are all connected to a compressed air supply source (not shown) via solenoid valves 16, 17 and 18. It is. The solenoid valve 16, 17, 18 is subjected to energization-deenergisation control of the loom control computer C.

As shown in FIG. 1, the slay 11 is supported by the swing shaft 21 via a sley sword 20. The swing shaft 21 reciprocates by obtaining a driving force from the loom driving motor M via a reciprocating drive mechanism. The slay 11 performs the bodybiting motion of the reciprocating swing by the reciprocating rotation of the swing shaft 11. The loom drive motor M is controlled by the loom control computer C. FIG.

A weft detector 19 is provided at the distal end of the weft chamber. When weft loading is normally performed, the tip of the weft Y reaches the detection region of the weft detector 19. When weft loading is normally performed in this manner, the loom control computer C causes the electronic cutter 22 to perform the cutting operation after the body biting. The weft yarn Y, which has been bodybited before the weaving of the woven fabric W by the deformation body 14, is cut by the cutting operation of the electron cart 22. The loom control computer C recognizes the rotation angle of the loom based on the angle detection information from the rotary encoder 39 for loom rotation angle detection. If the weft detector 19 does not detect the weft within a predetermined period of one rotation of the weaving machine, the loom control computer C determines that the weft is abnormal and controls the excitation control of the solenoid valves 16 and 17 and the transfer cutter 22. In addition to stopping, the operation of the loom driving motor (M) is stopped.

The woven fabric W is pulled toward the expansion bar 26 in cooperation with the surface roller 23 and a pair of press rollers 24 and 25. The surface roller 23 obtains a driving force from the loom driving motor M. FIG. The press rollers 24 and 25 which press the woven fabric W to the circumferential surface of the surface roller 23 are supported by the levers 27 and 28 via the roller shafts 241 and 251. These levers 27 and 28 are supported by the support shafts 29 and 30 so as to be rotatable. The adjusting screws 31 and 32 pass through the levers 27 and 28. Compression springs 33 and 34 are interposed between the levers 27 and 28 and the screw heads of the adjustment screws 31 and 32. The adjusting screws 31 and 32 are screwed to the fixing part 35 and the pressing force of the press rollers 24 and 25 against the surface roller 23 is adjusted by adjusting the screw fixing positions of the adjusting screws 31 and 32. do. Therefore, when the adjustment screws 31 and 32 are slowed down, the press rollers 24 and 25 fall off the surface roller 23 as shown by the dashed line of FIG.

On the other hand, a driving rotating body 36 is fixed to the roller shaft 241 of the press roller 24. The driven shaft 37 is rotatably supported by the support shaft 29. The circumferential surface of the driven rotating body 37 is in contact with the circumferential surface of the driving rotating body 36 under pressure, and the driven rotating body 37 moves in the opposite direction to the press roller 24 as the press roller 24 rotates. Rotate The drive timing pulley 40 which functions as a drive transmission body is supported by the support shaft 29 so that rotation is possible. The driving timing pulley 40 and the driven rotary body 37 are integrally coupled to each other, and the driving timing pulley 40 and the driven rotary body 37 may rotate in any direction with respect to the support shaft 29.

As shown in FIG. 2, the driven timing pulley 42 is fixed to the support shaft 41 rotatably supported by the support frame 38. On both sides of the driven timing pulley 42 and the drive timing pulley 40, a timing belt 43, which is a linear body, is suspended. A gripping rotator 44 is fixed to one end of the support shaft 41. A rubber elastic ring 441 is fitted to the peripheral surface of the gripping rotator 44. A fixed gripping body 45 is provided directly under the gripping rotating body 44. The upper surface of the fixed gripping member 45 is in contact with the peripheral surface of the elastic ring 441. The body-weft weft yarn Y is cut by the electronic cutter 22 and introduced into the gripping region of the gripping rotator 44 and the fixed gripping body 45 as the woven fabric W moves. And the end portion (Y1) of the weft is gripped between the gripping rotation member 44 and the fixed gripping body (45). The tip Y1 of the weft yarn held between the gripping rotator 44 and the fixed gripping body 45 is sent in the moving direction of the woven fabric W by the rotation of the gripping rotator 44.

At the time of weaving, the forward rotation of the surface roller 23 in the pulling direction of the woven fabric is performed by the press roller 24, the drive rotating body 36, the driven rotating body 37, the driving timing pulley 40, the timing belt 43, It is transmitted to the gripping rotator 44 via the driven timing pulley 42 and the support shaft 41. By this rotational transmission, the gripping rotator 44 rotates in the direction indicated by the arrow R in FIG. When the loom rotates in reverse, that is, when the loom driving motor M rotates in reverse, the surface roller 23 rotates in the reverse direction to the direction in which the woven fabric is pulled. In this reverse rotation state, the gripping rotator 44 rotates in the opposite direction to the arrow R. As shown in FIG. That is, the press roller 24 becomes a forward rotation drive means which rotates the holding | gripping tool 44 forward, and a reverse rotation drive means which rotates the holding | gripping tool 44 reversely. The driving rotary body 36, the driven rotary body 37, the driving timing pulley 40, the timing belt 43, and the driven timing pulley 42 are configured to hold the forward and reverse rotation of the press roller 24. It becomes a drive force transmission means to transmit to.

When weft error occurs, the loom control computer C stops the operation of the locomotive motor M, excites the solenoid valve 18, and injects the weft jersey nozzle 15. The jetting action of the weft keeping jersey nozzle 15 causes the weft yarn Ye subsequent to the weft and error chamber Ym to move away from the cutting region of the electron cart 22. The error chamber Ym is bodybited in front of the fabric W1. The loom stops immediately before the next bodybiting after the deformation body 14 bodybits the error chamber Ym.

The loom control computer C then slowly rotates the loom driving motor M a predetermined amount. Thereby, the opening of the warp yarn T becomes the largest opening which can remove the error chamber Ym in front of the fabric W1 of the woven fabric W. As shown in FIG. The surface roller 23 is rotated in the rewinding direction of the woven fabric by the reverse rotation of the linear driving motor M, and thus the gripping rotator 44 rotates in the opposite direction to the arrow R in FIG. Accordingly, the error chamber Ym held by the gripping rotator 44 and the fixed gripping body 45 is sent in the direction of being woven, so that the error chamber Ym is located between the gripping rotator 44 and the fixed gripping body 45. Free from gripping

Subsequently, the solenoid valve 18 stops discharging the weft containment nozzle 15. Then, the solenoid valves 16 and 17 are excited, and the main nozzle 12 for wefting and the auxiliary nozzle 13 for wefting are injected. Since the subsequent weft Ye is tied to the error chamber Ym, the subsequent weft Ye is subjected to the spraying action of the main nozzle 12 for weft loading and the auxiliary nozzle 13 for weft loading. Since the subsequent weft Ye is pulled in the weft loading direction by this spraying operation, the error chamber Ym is peeled off from the front of the fabric W1 from the main nozzle 12 for weft loading and discharged to the end of the weft loading in turn. .

In the first embodiment of the weft holding device of the loom according to the present invention, the following effects are obtained.

(1-1) When weft error occurs, the reverse rotation driving force of the press roller 24, which is the reverse rotation driving means, is transmitted to the gripping rotator 44, and the gripping rotator 44 reversely rotates. Therefore, the error chamber Ym, which is held between the gripping rotator 44 and the fixed gripping body 45, is sent to the woven rewinding direction, so that the error chamber is held by the gripping rotator 44 and the fixed gripping body 45. Freed from By releasing from this gripping action, the removal of the error chamber Ym can be performed. Therefore, the weft holding device configured to transmit the rotational driving force from the press roller 24 to the gripping rotator 44 can cope with the removal of the mistaken chamber with weft error.

(1-2) The main speed of the press roller 24 which pulls the woven fabric W in cooperation with the surface roller 23 is the moving speed of the woven fabric W. FIG. The circumferential speed of the holding | maintenance rotating body 44 needs to match the moving speed of the woven fabric W. As shown in FIG. However, if the respective diameters of the driving rotary body 36, the driven rotating body 37, the driving timing pulley 40 and the driven timing pulley 42 are set appropriately, the holding speed of the press roller 24 will be changed no matter how the circumferential speed changes. The circumferential speed of the whole 44 can be matched with the circumferential speed of the press roller 24. Therefore, the press roller 24 which rotates at the circumferential speed same as a woven fabric moving speed is suitable as a forward rotation drive means and a reverse rotation drive means for rotating the holding | gripping tool 44. FIG.

(1-3) When the woven fabric W is peeled off between the surface roller 23 and the press roller 24, the press roller 24 is rotated about the support shaft 29 by rotating the press roller 24 about the surface. It is separated from the roller 23. Even with this operation, the position of the support shaft 29 is not displaced. Therefore, the circumferential rotational trajectory of the timing belt 43 across the driving timing pulley 40 supported by the support shaft 29 and the driven timing pulley 42 does not change. As a result, excessive tension is applied to the timing belt 43, and the timing belt 43 is elongated or the tension acting on the timing belt 43 becomes too small, and the timing belt 43 is peeled off the pulleys 40 and 42. There is nothing to lose.

Example 2

Next, a second embodiment of FIG. 3 will be described.

The same code | symbol is attached | subjected to the structural part similar to 1st Embodiment.

In this second embodiment, an air cylinder 46 is provided near the circumferential rotational track of the timing belt 43. The roller 47 is attached to the drive rod 461 of the air cylinder 46. In accordance with the operation of the air cylinder 46, the movement trajectory of the roller 47 is substantially perpendicular to the timing belt 43. The air cylinder 46 is connected to a compressed air supply source (doxy) via a solenoid valve 48 of a three-way valve type. The solenoid valve 48 is controlled by the filter element of the loom control computer C. The air cylinder 46, the roller 47, and the solenoid valve 48 constitute a tension increasing means for the timing belt 43.

At the time of weaving, the solenoid valve 48 is in the element state and the roller 47 is in a position where it does not interfere (not contact) with the timing belt 43 as indicated by the solid line in FIG. When the loom is reversely rotated after the threading error has occurred, the solenoid valve 48 is excited before the reverse rotation of the loom, and the roller 47 is positioned at the position that interferes with the timing belt 43 as shown by the broken line in FIG. Is installed. When the surface roller 23 starts to rotate in reverse, the backlash between the timing belt 43 and the pulleys 40 and 42 may delay the start of the reverse rotation of the gripping rotator 44. If the reverse rotation start of the gripping rotator 44 is delayed, the error chamber gripped by the gripping rotator 44 and the fixed gripping body 45 may not be sent a sufficient distance in the direction of rewinding and the removal of the error chamber may fail. There is. However, due to the interference between the roller 47 and the timing belt 43, the tension of the timing belt 43 increases, and the backlash is eliminated. Accordingly, the gripping rotator 44 immediately follows the start of the reverse rotation of the surface roller 23 so that the start of the reverse rotation of the gripping rotator 44 is not delayed.

Example 3

Next, the third embodiment of FIG. 4 will be described. The same code | symbol is attached | subjected to the structural part similar to 1st Embodiment.

In this 3rd Embodiment, the holding | gripping tool 44 and the fixed holding body 45 are installed upside down compared with the case of 1st Embodiment. In addition, the drive timing pulley 49 is fixed to the roller shaft 241 of the press roller 24, and the timing belt 43 is crossed between the drive timing pulley 49 and the driven timing pulley 42.

In this 3rd Embodiment, since the rotation direction of the holding | gripping tool 44 is the same as that of the press roller 24, a drive force transmission structure becomes simple compared with the case of 1st Embodiment.

Example 4

Next, the fourth embodiment of FIG. 5 will be described. The same code | symbol is attached | subjected to the same component as 1st Embodiment.

In this fourth embodiment, the fixed gripping member 45 is supported by the air cylinder 50 so as to be close to or away from the elastic ring 441 of the gripping rotating body 44. The air cylinder 50 is connected to a compressed air supply source (not shown) via a three-way valve type solenoid valve 51. The solenoid valve 51 is controlled by the filter element of the loom control computer C. As shown in FIG. The air cylinder 50 and the solenoid valve 51 constitute a gripping action canceling means.

At the time of weaving, the fixed gripping member 45 is moved upward by the air cylinder 50 and is installed at a position in contact with the elastic ring 441. At the time of reverse rotation of the loom, the fixing gripping member 45 is moved downward by the air cylinder 50 before starting the reverse rotation of the loom and is installed at a position separated from the elastic ring 441. Therefore, during the reverse rotation of the loom, the error chamber is completely released from the gripping action by the gripping rotator 44 and the fixed gripping body 45, and the certainty of the success of the error chamber processing is further enhanced.

Example 5

Next, the fifth embodiment of FIGS. 6 to 8 will be described. The same code | symbol is attached | subjected to the structural part similar to 1st Embodiment.

In the fifth embodiment, the air cylinder 52 is provided near the circumferential rotational track of the timing belt 43. In the air cylinder 52, a driving rod 522 and a return spring 523 connected to the piston 521 are accommodated. The piston 521 partitions and forms a pressurized room 524 in the air cylinder 52 so that a return spring 523 causes the piston 521 to be biased toward the pressure chamber 524. )

The support frame 56 is attached to the drive rod 522 of the air cylinder 52. The tensioning roller 53 and the tension portion roller 54 are supported by the support frame 56. The tensioning roller 53 guides the timing belt 43 from the lower portion 432 of the timing belt 43 and the tensioning roller 54 is directly above the upper portion 431 of the timing belt 43. It is installed. The movement trajectory of the tensioning roller 53 and the tensioning roller 54 according to the operation of the air cylinder 52 is substantially orthogonal to the timing belt 43. The air cylinder 52 is connected to a compressed air supply source (not shown) via the solenoid valve 55 of a three-way valve type. The solenoid valve 55 is controlled by the filter element of the loom control computer C. As shown in FIG.

At the time of weaving, the solenoid valve 55 is in the element state, and the tensioning roller 53 and the tensioning roller 54 are in the position shown in FIG. At this time, the path of the timing belt 43 is a curved path for bending the upper portion 431 of the timing belt 43 toward the straight line, and the lower portion 432 of the timing belt 43 toward the upper portion 431. It is.

When weft error occurs, the loom control computer C stops the operation of the loom driving motor M, and excites the solenoid valve 18 to eject the weft containment nozzle 15. The jetting action of the weft keeping jersey nozzle 15 disengages the weft yarn Ye following the weft filling error from the cut-off region of the electron cutter 22 to the position formed in the cutting region of the electronic cutter 22. The error chamber Ym is bodybited to the fabric arm W1. The loom stops immediately before the next bodybiting after the deformation body 14 bodybits the error chamber Ym.

Subsequently, the loom control computer C slowly rotates the loom driving motor M by a predetermined amount. Thereby, the opening of the warp yarn T becomes the largest opening which can remove the error chamber Ym in front of the fabric W1 of the woven fabric W. As shown in FIG. The surface roller 23 rotates in the woven fabric rewinding direction by the reverse rotation of the linear driving motor M, and the gripping rotator 44 rotates in the reverse direction of the arrow R in FIG. After slowly rotating the linear motor M in a predetermined amount, the loom control computer C excites the solenoid valve 55. The air pressure is supplied to the pressure chamber 524 by the excitation of the solenoid valve 55. Then, the tensioning roller 53 and the tensioning roller 54 move and are installed in the position shown in FIG. 8 against the elastic additional force of the return spring 523 by air pressure. At this time, the path of the timing belt 43 is a curved path for bending to the upper part 431 of the timing belt 43, and the lower part 432 of the timing belt 43 is a straight path.

As the path of the timing belt 43 changes from the state of FIG. 6 to the state of FIG. 8, the gripping rotating body 44 rotates in the opposite direction to the arrow R of FIG. 6. Accordingly, the reverse rotation amount of the gripping rotating body 44 is the difference between the reverse rotation amount due to the reverse rotation of the linear drive motor M and the reverse rotation amount due to the path change accompanying the projecting motion of the air cylinder 52. . The press roller 66 constituting the forward rotation drive means constitutes a linkage reverse rotation drive means for reverse rotation of the gripping rotation body 44 in conjunction with the direct drive motor M. As shown in FIG. That is, the forward rotation drive means having the press roller 66 also serves as the interlock reverse rotation drive means. On the other hand, the air cylinder 52 and the tension-added roller 54 constitute independent reverse rotation drive means for reversely rotating the gripping rotator 44 independently of the linearly driven motor M.

Subsequent error chamber processing is performed as in the case of the first embodiment. When the error chamber processing is completed, the solenoid valve 55 is demagnetized so that the tensioning roller 53 and the tensioning roller 54 return to the position of FIG. 6 by the elastic force of the return spring 523.

In the fifth embodiment of the weft gripping apparatus of the loom according to the present invention, the following effects are obtained.

(5-1) When the amount of reverse rotation of the gripping rotator 44 is θ, the amount of reverse rotation θ is approximately shown by the following equation (1).

rθ ≒ L1 / cosα + L2 / cosβ-L (1)

Where r is the radius of the driven timing pulley 42, α and β are the angles shown in FIG. 8, L is the length L1 of the straight path of the upper portion 431 of the timing belt 43, and the driven timing pulley 42 Is the length of the straight path of the upper part 431 to the tensioning roller 54, and L2 is the length of the straight path of the upper part 431 to the tension adding roller 54 in the driving timing pulley 40. The reverse rotation amount θ of the gripping rotator 44 can be changed by changing the angles α and β. These angles α and β can be changed by changing the installation position of the air cylinder 52 in the amount of movement of the roller 54 or the path direction of the upper portion 431. That is, the reverse rotational amount θ of the gripping rotator 44 can be set by the independent reverse rotation driving means so as to release the end of the error chamber Ym in the gripping action between the gripping rotator 44 and the fixed gripping body 45. have. Accordingly, the error chamber Ym is reliably released from the gripping action between the gripping rotator 44 and the fixed gripping body 45.

(5-2) The gripping rotating body 44 is reversely rotated by changing the path of the timing belt 43 which is a linear body. Therefore, the path changing means for changing the path of the timing belt 43 constituted by the air cylinder 52 and the tension part roller 54 as the tension part chain is a simple configuration as independent reverse rotation drive means.

(5-3) The air cylinder 52 which is a fluid pressure cylinder, and the tension addition roller 54 comprise the tension addition means which adds tension to the timing belt 43. As shown in FIG. Thus, the air cylinder 52 is simple as a component of the tension adding means.

(5-4) The return spring 523 applies tension to the timing belt 43 via the tensioning roller 53, while the air pressure supplied to the air cylinder 52 passes through the tension section roller 54. Tension is added to the timing belt 43. This tension portion changes the path of the timing belt 43. In other words, the return spring 523 is a means for returning the roller 54 to the position in FIG. 8 and an elastic force applying means for applying tension to the timing belt 43. Therefore, the structure which combines the elastic additional force provision means with the return spring 523 in the air cylinder 52 leads to the simplification of a mechanism.

Example 6

Next, a sixth embodiment of FIG. 9 will be described.

The same code | symbol is attached | subjected to the structural part similar to 5th Embodiment.

In this sixth embodiment, an arc-shape gripper 57 is supported by the lever 58. The circular arc surface 571 of the gripper 57 has a radial center on the support shaft 581 of the lever 58. The drive rod 591 of the air cylinder 59 is connected to the lever 58, and the compressed air is supplied to the air cylinder 59 via the solenoid valve 60 of the three-way valve type. The tensioning roller 53 is in contact with the timing belt 43 by applying a compression spring force.

At the time of weaving, the solenoid valve 60 is elementary and the holding body 57 is in the solid line position of FIG. When weft error occurs, the loom control computer C excites the solenoid valve 60 so that the driving rod 591 of the air cylinder 59 protrudes. By this protrusion, the holding body 57 moves from the solid line position in FIG. 9 to the chain line position, and the holding body 44 rotates in reverse. That is, in addition to the reverse rotation of the gripping rotator 44 accompanying the reverse rotation of the linearly driven motor M, the gripping rotator 44 accompanying the protruding operation of the air cylinder 59 constituting the independent reverse rotation drive means. By the reverse rotation, the error chamber is reliably released from the gripping action between the gripping rotating body 44 and the gripping body 47.

Example 7

Next, the seventh embodiment of FIG. 10 will be described. The same code | symbol is attached | subjected to the same structural part as 3rd Embodiment and 5th Embodiment.

In this seventh embodiment, the tension applying roller 53 is in contact with the upper portion 431 of the timing belt 43 while applying the tension, and the tension portion of the roller 54 is placed on the lower portion 432 of the timing belt 43. It is installed. In this seventh embodiment, the same effects as in the fifth embodiment can be obtained.

Example 8

Next, the eighth embodiment of FIGS. 11 and 12 will be described. The same code | symbol is attached | subjected to the structural part similar to 6th Embodiment.

In this eighth embodiment, the driven timing pulley 67 for forward rotation and the driven timing pulley 62 for reverse rotation are supported with respect to the support shaft 41 so as to be rotatable. The pair of timing belts 68 and 63 spans between the drive timing pulley 40 and the driven timing pulleys 67 and 62. The tensioning roller 53 applies tension to both timing belts 68 and 63. Between the driven timing pulley 67 and the support shaft 41 is interposed between the driven timing pulley 67 and the support shaft 41 for one-way clutch 64 for rotation, while the driven timing pulley 62 and the support shaft ( Between the 41 and the reverse rotation one-way clutch 65 is interposed. The drive clutch 641 of the rotary only one-way clutch 64 is coupled to the driven timing pulley 67, and the driven clutch body 642 of the rotary only one-way clutch 64 is fixed to the support shaft 41. The drive clutch body 651 of the reverse rotation one-way clutch 65 is coupled to the driven timing pulley 62, and the driven clutch body 652 of the reverse rotation one-way clutch 65 is fixed to the support shaft 41.

The rotation of the press roller 24 at the time of manufacture passes through the drive timing pulley 40, the timing belt 68, the driven timing pulley 67 for rotation, the one-way clutch 64 for rotation, and the support shaft 41. The rotating body 44 is transmitted, and the holding body 44 rotates in the direction of arrow R in FIG. When weft error occurs, the loom drive motor M is slowly reversed by a predetermined amount, and the press roller 24 is reversely rotated accordingly. Reverse rotation of the press roller 24 is carried by the driving timing pulley 40, the timing belt 63, the driven timing pulley 62 for reverse rotation, the one-way clutch 65 for reverse rotation, and the support shaft 41. And the gripping rotator 44 rotates in the reverse direction to arrow R in FIG.

The diameter of the driven timing pulley 62 is smaller than the diameter of the driven timing pulley 67. In addition, the size of the timing pulley 62 is smaller than the size of the driven timing pulley 67. Therefore, the amount of rotation of the driven timing pulley 62 for one rotation of the drive timing pulley 40 is larger than the amount of rotation of the driven timing pulley 67 for one rotation of the drive timing pulley 40. That is, the gripping rotator 44 is interlocked with the loom driving motor M, which rotates in reverse, but the amount of rotation during the reverse rotation of the gripping rotator 44 is the forward rotation of the gripping rotator 44. As the amount of rotation increases, the error chamber is reliably released from the gripping action between the gripping rotator 44 and the fixed gripping body 45. The driven timing pulleys 67 and 62, the timing belts 68 and 63, the one-way clutch 64 for forward rotation and the one-way clutch 65 for reverse rotation constitute a counter-rotation amount increasing means. By this reverse rotation increasing means, the error chamber is reliably released from the gripping action of the gripping rotating body 44 and the fixed gripping body 45 at the time of processing the error chamber.

In the present invention, the gripping rotator may be driven by a motor capable of independent reverse rotation of the loom driving motor. Moreover, in this invention, a body bitting means can also be employ | adopted as a forward rotation drive means.

Claims (13)

During weaving, the gripping rotator 44 which grips the end of the weft yarn Y1 near the front fabric W1 of the woven fabric W is rotated according to the moving speed of the woven fabric W, and the gripping rotator ( Weft holding device of the weaving machine for discharging the end of the weft (Y1) held between the 44 and the separate holding member 45 in the moving direction of the woven fabric (W) in accordance with the rotation of the gripping rotor (44) To Forward rotation driving means 24 for forward rotation of the gripping rotator 44 in accordance with the weaving movement of the woven fabric W; Weaving machine of a loom having reverse rotation drive means (24) for reverse rotation of the gripping rotating body (44). The weft holding device of a loom according to claim 1, wherein at least one of the forward rotation drive means (24) and the reverse rotation drive means (24) also serves as a woven fabric handling means. 3. The woven fabric handling means according to claim 1 or 2, wherein the woven fabric handling means is a press roller 24 constituting the woven fabric pulling means together with the surface roller 23, and both the forward rotation drive means and the reverse rotation drive means are pressed. The weft holding device of the loom which is a roller (24). 4. The drive shaft (36) which integrally rotates with the press roller (24), a lever (27) for supporting the press roller (24), and a support shaft for supporting the lever (27). 29), a driven rotating body 37 supported by the support shaft 29 and obtaining a driving force from the driving rotating body 36, a drive transmission body 40 which rotates integrally with the driven rotating body 37, And a driven transmission body 42 which rotates integrally with the gripping rotation body 44, and a linear body 43 which transmits the rotation of the drive transmission body 40 to the driven transmission body 42. And a driving force transmitting means, wherein the rotation of the press roller (24) is transmitted to the gripping rotating body (44) via a driving force transmitting means. 5. The weft grip of a loom according to claim 4, wherein said linear body is a timing belt (43), and is provided with tension increasing means (46) for increasing the tension of said timing belt (43) than the tension at the time of weaving. Device. The weft holding of the loom according to claim 1 or 2, wherein the reverse rotation drive means includes independent reverse rotation drive means (52) for rotating the gripping rotation body (44) independently of the loom driving motor (M). Device. 7. The reverse rotation drive means according to claim 6, wherein the reverse rotation drive means includes an interlock reverse rotation drive means 66 for reverse rotation of the gripping rotator 44 in conjunction with a reverse rotation of the loom driving motor M, and the interlock reverse rotation drive means. Weft of the loom interlocked with the loom drive motor M so as to be independent independent rotation drive means 52 independent from 66, and the forward rotation drive means 66 also serves as the interlocking reverse rotation drive means 66. Gripping device. 8. The interlocking reverse rotation driving means (66) according to claim 7, wherein the interlocking reverse rotation driving means (66) includes a linear body (43) for transmitting the rotational driving force of the loom driving motor (M) to the gripping rotation body (44). The weft holding device of the loom which includes the path change means 52 which changes the path | route of the linear body 43, and rotates the holding | gripping tool 44 back. 9. The path changing means (52) according to claim 8, wherein the path changing means (52) applies an elastic additional force to the ship body (43) via a tension applying roller (53) for applying tension to the ship body (43) and the tension applying roller (53). Tension adding means for applying tension to the linear body 43 in a direction in which the gripping rotator 44 reversely rotates against the action of the elastic additional force applying means 523 to be applied and the elastic additional force applying means 523 ( A weft holding device for a loom having 54). 10. The tension adding means (54) according to claim 9, wherein the tension adding means (54) includes a tension adder (54) for applying tension to the linear body (43), and a fluid pressure cylinder (52) for driving the tension adder (54). Weft holding device of the loom. The tension applying roller (53) is connected to the tension adding member (54), and the fluid pressure cylinder (52) is applied to the tension adding member against the fluid pressure acting on the tension adding member (54). 54. A weft holding device for a loom having a return spring (523) acting on said (54), said return spring (523) also acting as an elastic imparting force. The reverse rotation drive means includes reverse rotation amount increasing means (64, 65) for interlocking with the loom drive motor (M) and for increasing the reverse rotation amount of the gripping rotation body (44). Weft gripping device of the loom. The holding | gripping action by the holding | gripping tool 44 and the other holding | gripping tool 45 is eliminated by separating the holding | gripping tool 44 and the other holding body 45. The weft holding device of the loom which is provided with the holding | gripping action canceling means 50 to make.