JP2003221756A - Weft inserting controller in jet loom - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a weft inserting controller with which a rise in tension of a weft is controlled while controlling load torque. <P>SOLUTION: A distance L1 between the axis 222 of rotation of a stepping motor 22 and a first guide ring 24 is made smaller than a distance L2 between the axis 222 of rotation and a second guide ring 25. When the weft Y1 is in a second yarn route, namely a yarn route change body 23 exists in a weft braking position, a yarn bending angle α becomes larger than a yarn bending angle β. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weft insertion control device in a jet loom in which wefts are wefted by a fluid ejecting action of a nozzle.

[0002]

2. Description of the Related Art The end of the weft flight in a jet loom is the end of the weft withdrawal from the weft measuring and storage device. It will be stopped suddenly and the weft thread tension will be increased. Sudden tension increases can lead to weft yarn breakage. Therefore, a weft insertion control device is used that brakes the weft when the weft insertion is almost finished to suppress a sudden tension increase.

A weft insertion control device of this type is disclosed in Japanese Patent Laid-Open No. 60-1.
No. 85844, JP-A-5-98539, JP-A-6-184868, and JP-A-7-48760. In these weft-insertion control devices, a linear member that is arranged to be switched between a position that does not interfere with the weft and a position that interferes with the weft is driven by a rotary actuator such as a rotary solenoid or a pulse motor. The braking of the weft yarn near the end of the weft insertion is brought about by the bending resistance of the weft yarn which is bent by the linear member arranged at a position where it comes into contact with the weft yarn.

In the case of multi-color weft insertion, if a weft thread waiting for weft insertion protrudes from the nozzle tip of an adjacent main weft insertion nozzle, the weft thread to be wefted may be entangled.
Therefore, it is necessary to draw the weft yarn waiting for weft insertion into the main nozzle for weft insertion. JP-A-63-13554
Japanese Unexamined Patent Publication No. 4 discloses a pullback device for pulling a weft yarn waiting for weft insertion into the main nozzle for weft insertion.

[0005]

Problems to be Solved by the Invention JP-A-60-1858
No. 44, No. 5-98539, No. 6-
It is possible to add a weft pull-back function to the weft insertion control device disclosed in Japanese Patent No. 184868 and Japanese Patent Application Laid-Open No. 7-48760. In this case, the rotary actuator is rotated in a direction in which the weft yarn bending path is further increased, and the torque acting as a load on the rotary actuator is further increased. In order to cope with the increase in load torque, the rotary actuator needs to be upsized, which causes a cost problem.

It is an object of the present invention to provide a weft insertion control device capable of suppressing an increase in tension of a weft yarn while suppressing a load torque.

[0007]

To this end, according to the invention of claim 1, a first yarn path which is a weft path at the time of weft insertion between the weft measuring and storing device and the nozzle, and the first yarn path. Yarn path changing means for changing the yarn path of the weft yarn with respect to the second yarn path that provides a weft inserting resistance larger than the weft inserting resistance in, and a first yarn path changing means arranged upstream of the yarn path changing means. A weft-insertion control device including a yarn guide and a second yarn guide arranged downstream of the yarn path changing means is configured, and the weft yarn is in contact with the weft yarn at least on the second yarn path side. First and second contact bodies moved between a first thread path and the second thread path; and the first and second
Configuring the yarn path changing means having a rotation driving means for integrally moving the conflicting body of (1) by a rotational force, the position of the rotation axis of the rotation driving means is set between the pair of conflicting bodies, The distance between the rotation axis and the first contact body is
It is smaller than the distance between the rotation axis and the second contact member, and the arrangement relationship between the rotation axis, the pair of yarn guides and the pair of contact members is such that the weft yarn is in the second yarn path. In some cases, the thread bending angle in the first conflicting body is made larger than the thread bending angle in the second conflicting body.

The weft yarn is transferred to the second yarn path near the end of weft insertion. The load applied to the yarn path changing means when the weft is transferred to the second yarn path is higher than that in the case of the first yarn path. This increase in the load reduces the weft insertion speed of the weft, and suppresses a rapid tension increase at the end of the weft insertion of the weft. The magnitude relationship between the thread bending angle in the first conflicting body and the thread bending angle in the second conflicting body increases the rate at which the suppression of the rapid tension increase is shared by the first conflicting body. The distance relationship between the rotation axis and the first and second contact bodies is advantageous in obtaining the bending amount of the weft with a small rotation amount of the rotation driving means.

According to the invention of claim 2, in claim 1,
The first conflict body is arranged upstream of the second conflict body, and the first yarn path between the pair of yarn guides is
When the weft yarn is a straight route and the weft yarn moves from the first yarn route to the second yarn route, the first contact body moves from the downstream side to the upstream side and in the rotation direction of the rotation drive means. It came close to the first thread guide.

Such a relative movement relationship between the first contact member and the first thread guide allows the thread bending angle in the first contact member to be increased with a small amount of rotation of the rotary drive means. It is advantageous.

According to the invention of claim 3, in claim 2,
The distance between the first thread guide and the first contact member is smaller than the distance between the second thread guide and the second contact member.

[0012] Such a distance relationship is expressed by the yarn bending angle in the first contact member and the second bending angle when the weft yarn is in the second yarn path.
It is effective in making a difference in the bending angle of the thread in the contact body of. The share ratio of the suppression of the rapid tension increase on the side of the first conflicting member is the first when the weft is in the second yarn path.
The larger the difference between the thread bending angle in the second contact member and the thread bending angle in the second contact object, the larger the difference.

According to the invention of claim 4, in claim 3,
The rotation axis is set at a position displaced from the first yarn path, and the rotation direction of the rotation driving means when the weft is moved from the first yarn path to the second yarn path is the first direction. Direction in which the conflicting body moves from the position of the first thread path to the rotation axis position side, and the second collision object moves from the position of the first thread path toward the opposite side to the rotation axis position. And

The arrangement position of the rotation axis and the setting of the rotation direction are advantageous in increasing the yarn bending angle in the first contact member with a small rotation amount of the rotation driving means. According to a fifth aspect of the present invention, in the fourth aspect, the yarn path changing means has a first yarn path which is a weft path at the time of the weft insertion and a weft insertion larger than a weft insertion resistance in the first yarn path. A weft yarn path is changed between a second thread path that bends the weft thread so as to provide resistance, and a third thread path that bends the weft thread more than the second thread path and pulls back the weft thread. I chose

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the pair of contact bodies are guide rings through which the weft thread passes, and the pair of guide rings have the weft thread first. When it is in the first yarn path, it is positioned so as not to touch the weft yarns in the first yarn path.

The weft yarn between the first yarn guide and the second yarn guide is transferred from the linear first yarn path to the bent second yarn path near the end of weft insertion. When it is not near the end of weft insertion, the weft yarn between the first yarn guide and the second yarn guide does not contact the contact body,
The flight resistance of the weft yarn is suppressed except when it is near the end of weft insertion.

[0017]

DETAILED DESCRIPTION OF THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1A, the weft yarn Y1 is wound and stored on the yarn winding surface 112 by the rotation of the yarn winding tube 111 of the winding type weft measuring and storing device 11. The weft yarn Y1 wound and stored on the yarn winding surface 112 is pulled out by the fluid jetting action of the weft inserting main nozzle 13A while being released from the locking action of the locking pin 121 driven by the electromagnetic solenoid 12. The locking pin 121 is disengaged from the bobbin winding surface 112 based on the excitation command of the control device 15 to the electromagnetic solenoid 12. The jetting of the weft inserting main nozzle 13A and the detachment of the locking pin 121 are performed at different timings or substantially the same timings depending on the yarn type.

A reflection type photoelectric sensor type weft unwinding detector 14 is installed near the bobbin winding surface 112. The weft unwinding detector 14 detects the unwound yarn pulled out from the yarn winding surface 112, and the detection signal is sent to the control device 15. When the number of unwinding the wound thread reaches a predetermined number, the control device 15 commands the demagnetization of the electromagnetic solenoid 12, and the locking pin 121 engages with the thread winding surface 112. When the locking pin 121 engages with the bobbin winding surface 112, the weft Y1 is prevented from being pulled out.

A supporting frame 16 is installed between the weft measuring and storing device 11 and the weft inserting main nozzle 13A. The support frame 16 includes a flat plate-shaped substrate portion 161 and a substrate portion 161.
The guide plate portion 162 is integrally formed at an end portion of the weft measuring and storing device 11 side, and the support block 163 is integrally formed at an end portion of the substrate portion 161 on the weft inserting main nozzle 13A side. The ring-shaped first thread guide 17 is fixed to the guide plate portion 162 (note that the guide plate portion 162 is not shown).
The support blocks 163 and the support blocks 163 may be configured separately and attached to the substrate portion 161). The first thread guide 17 is made of ceramics. Support block 16
A support hole 164 is recessed at the upper end of the support hole 3.
A part of the slider 18 is slidably fitted in 64. A ring-shaped second thread guide 21 is fixedly attached to the slider 18. The second yarn guide 21 is made of ceramics.

A spring bearing 19 is fixed to the base plate portion 161 so as to face the slider 18, and a compression spring 20 is interposed between the spring bearing 19 and the slider 18. The compression spring 20 biases the slider 18 in the direction of pushing it into the support hole 164. The hole direction of the thread passing hole 171 of the first thread guide 17 and the hole direction of the thread passing hole 211 of the second thread guide 21 are the same direction. Slider 18
Is pushed into contact with the bottom of the support hole 164, the threading hole 171 of the first thread guide 17 and the second threading hole 171
The threading hole 211 of the thread guide 21 is the threading hole 171.
Are arranged on substantially the same axis as seen in the hole direction.

As shown in FIGS. 1B and 2, a stepping motor 22 is attached to the back surface of the substrate portion 161. The output shaft 221 of the stepping motor 22 is
The thread route changing body 23 is fixed to the protruding portion of the output shaft 221 by penetrating the substrate portion 161 and projecting to the front surface side of the substrate portion 161. The yarn path changing body 23 has a linear yarn passage 231 formed therethrough. A ring-shaped first guide ring 24 is fitted into and fixed to one opening of the thread passage 231. A ring-shaped second guide ring 25 is fitted and fixed in the other opening of the thread passage 231. First guide ring 24 and second guide ring 2
5 constitutes a contact member of the yarn path changing means of the present invention. The guide rings 24 and 25 are made of ceramics. The threading holes 241 and 251 of the guide rings 24 and 25 overlap the thread passage 231 when viewed in the passage direction of the thread passage 231. The yarn path changing body 23 rotates integrally with the output shaft 221 as the stepping motor 22 operates. Weft Y1
Is passed through the first yarn guide 17, the first guide ring 24, the yarn passage 231, the second guide ring 25, and the second yarn guide 21.

Stepping motor 2 which is a rotation driving means
2 is controlled by the controller 15. The control device 15
The operation of the stepping motor 22 is controlled based on the loom rotation angle detection information obtained from the rotary encoder 26 that detects the rotation angle of the loom. 1 (a) and 1 (b),
The state immediately before the start of weft insertion with respect to the weft Y1 is shown. Weft Y
Immediately before the weft insertion of No. 1 is started, the yarn path changing body 23
Is the thread passage holes 171 and 211 in the passage direction of the thread passage 231.
The weft insertion position is set to be the same direction as the hole direction. When the passage direction of the yarn passage 231 is in the same direction as the yarn passage holes 171 and 211, the yarn passage hole 171 of the first yarn guide 17, the yarn passage hole 211 of the second yarn guide 21, and the yarn passage 231. Are arranged on substantially the same axis as seen in the hole direction of the threading hole 211. In this state, the weft Y1 is
A first yarn path that is a linear weft path is formed between the first yarn guide 17 and the second yarn guide 21, and the weft yarn Y1 does not contact the guide rings 24 and 25.

The yarn path changing body 23, the first guide ring 2
4, second guide ring 25 and stepping motor 2
Reference numeral 2 constitutes yarn path changing means for changing the yarn path of the weft Y1 between the first yarn path and the second yarn path that causes a weft inserting resistance larger than the weft inserting resistance in the first yarn path. To do.

A pair of guide rings 24, 2 which are conflicting bodies
The second yarn guide 21 located downstream of 5 is a movable body that comes into contact with the weft yarn Y1 that moves between the first yarn path and the second yarn path. The compression spring 20 is an elastic biasing means that elastically biases the second yarn guide 21 from the second yarn route side toward the first yarn route side. The spring receiver 19 is a support means that supports the stationary end of the compression spring 20. The slider 18, the second thread guide 21, the spring receiver 19 and the compression spring 20 are
The weft-insertion resistance giving means for giving the weft-insertion resistance to the weft Y1 via the second yarn guide 21 increases as the movement of the weft Y1 from the above-mentioned yarn path increases.

As shown in FIG. 1A, a weft-insertion main nozzle 13B different from the weft-insertion main nozzle 13A is
A weft yarn Y2 different from the weft yarn Y1 is ejected to insert the weft yarn. The weft Y2 is measured by a weft measurement storage device similar to the weft measurement storage device 11. A yarn path changing means having the same configuration as the above-mentioned yarn path changing means is arranged between the weft measuring and storing device and the weft inserting main nozzle 13B, and the weft Y2 is the first yarn as described above. The yarn path and the second thread path are arranged. The electromagnetic solenoid in the weft measuring and storing device corresponding to the weft inserting main nozzle 13B and the stepping motor in the yarn path changing means corresponding to the weft inserting main nozzle 13B are controlled by the controller 15. The weft insertion main nozzles 13A and 13B are selected and jetted based on a preset weft selection pattern.

When the weft Y1 is selected and weft-inserted, the control device 15 commands the excitation of the electromagnetic solenoid 12 at a predetermined loom rotation angle, and the locking pin 121 causes the thread winding surface 1 to rotate.
Leave from 12. Further, the weft Y1 released from the locking action of the locking pin 121 by the fluid injection of the weft inserting main nozzle 13A is ejected from the weft inserting main nozzle 13A.

When the weft insertion of the weft Y1 is near the end, the control device 15 performs stepping so that the yarn path changing body 23 is pivotally arranged from the weft insertion position of FIG. 1A to the weft braking position of FIG. The operation of the motor 22 is controlled. When the yarn path changing body 23 is in the weft braking position shown in FIG. 3, the weft Y1
Takes a second yarn path having a bent shape between the first yarn guide 17 and the second yarn guide 21 while being in contact with the pair of yarn guides 17 and 21 and the pair of guide rings 24 and 25. The weft tension at this time moves the second yarn guide 21 and the slider 18 against the spring force of the compression spring 20. The direction of rotation of the stepping motor 22 when moving the weft Y1 from the first yarn path to the second yarn path is such that the first guide ring 24 moves from the position of the first yarn path to the rotation axis 222.
The second guide ring 25 moves toward the position opposite to the position of the rotation axis 222 from the position of the first yarn path.

When the electromagnetic solenoid 12 is demagnetized and the locking pin 121 engages with the bobbin winding surface 112, the unwinding and unwinding of the weft Y1 is blocked and the weft insertion is completed. The increase in tension at the end of weft insertion further moves the second yarn guide 21 and the slider 18 from the state of FIG. 3 against the spring force of the compression spring 20. FIG. 4 shows the upward movement of the second yarn guide 21 due to the tension increase at the end of weft insertion.

In the case of multi-color weft insertion, if the weft thread waiting for weft insertion protrudes from the nozzle tips of the adjacent main weft insertion nozzles 13A, 13B, the front end portion of the weft thread waiting for weft insertion will be inserted. There is a risk that the weft will be entangled. Therefore,
It is necessary to draw the weft thread waiting for weft insertion into the main nozzle for weft insertion. After the weft Y1 having been put in the weft is cut and separated from the woven fabric (not shown), the control device 15 moves the yarn path changing body 23 from the weft braking position shown in FIGS. 3 and 4 to the pullback position shown in FIG. The operation of the stepping motor 22 is controlled so that the stepping motor 22 is rotated in the yarn path. The yarn path between the first yarn guide 17 and the second yarn guide 21 in the state of FIG. 5 is in a bent state larger than that of the second yarn guide in the state of FIG. Therefore, the weft Y1 that reaches the weft-insertion main nozzle 13A from the second yarn guide 21 is pulled back toward the weft measuring and storing device 11 side, and the tip of the weft Y1 waiting for the weft insertion is drawn into the weft-insertion main nozzle 13A. Be done.

The first thread guide 17 and the second thread guide 21
The first yarn path between and is linear. As shown in FIG. 1B, the first yarn path is orthogonal to the rotation axis 222 when seen in a plan view. As shown in FIG. 1A, the arrangement position of the rotation axis 222 of the stepping motor 22 that is the rotation driving means is set between the pair of yarn guides 17 and 21. The distance L1 between the rotation axis 222 and the first guide ring 24 is smaller than the distance L2 between the rotation axis 222 and the second guide ring 25. The distance L3 between the first yarn guide 17 and the first guide ring 24 when the yarn path changing body 23 is in the first yarn path which is the weft inserting position is equal to the distance between the second yarn guide 21 and the second yarn guide 21. Is smaller than the distance L4 from the guide ring 25.

The following effects are obtained in the first embodiment. (1-1) In the state where the weft Y1 is inserted along the first yarn path shown in FIG. 1A, the weft Y1 between the first yarn guide 17 and the second yarn guide 21 The path has a linear shape that does not contact the pair of guide rings 24 and 25. Therefore, the weft yarn Y which is weft-inserted along the first yarn path
The weft insertion resistance of 1 is small. The weft Y1 is transferred from the first yarn path shown in FIG. 1A to the second yarn path shown in FIG. 3 near the end of weft insertion. The yarn bending angle when the weft yarn Y1 is in the first yarn path is 0 ° in the unbent state. The yarn bending angles α and β in the guide rings 24 and 25 when the weft Y1 is in the second yarn path are larger than 0 °. That is, the yarn bending angles α and β in the guide rings 24 and 25 when the weft Y1 is in the second yarn path are as follows.
It becomes larger than the yarn bending angle at 25. Therefore, the load applied to the stepping motor 22 when the weft Y1 is moved to the second yarn path near the end of weft insertion is higher than that in the first yarn path due to the change of the yarn path. Second
The bending resistance provided by the bending shape of the yarn path and the spring force of the compression spring 20 give a braking action to the weft Y1 during weft insertion. The increase in the load on the stepping motor 22 due to the transfer of the weft Y1 from the first yarn path to the second yarn path near the end of the weft insertion decelerates the weft insertion speed of the weft Y1 and at the end of the weft insertion of the weft Y1. The rapid increase in tension in the is suppressed.

(1-2) As shown in FIG. 3, when the weft Y1 is in the second yarn path, that is, when the yarn path changing body 23 is in the weft braking position, the yarn bending angle α is the yarn bending angle β.
Greater than. The size relationship between the yarn bending angles α and β is determined by the positional relationship between the rotation axis 222, the pair of yarn guides 17 and 21, and the pair of guide rings 24 and 25. In the present embodiment, when the yarn path changing body 23 is in the first yarn path which is the weft inserting position, the yarn guide 17,
21 and the guide rings 24 and 25 are on the same straight line,
The magnitude relationship of L1 <L2 and L3 <L4 is set. Further, the rotation axis 222 is set at a position displaced from the yarn path (position displaced downward in the illustrated example). Such an arrangement relationship brings about a magnitude relationship α> β between the yarn bending angles α and β when the weft yarn Y1 is in the second yarn path. α
The magnitude relationship of> β brings about a magnitude relationship of F1> F2 between the load F1 applied by the weft thread tension on the first guide ring 24 and the load F2 applied by the weft thread tension on the second guide ring 25. As the distance L1 is smaller than the distance L2,
Moreover, as the load F2 is smaller than the load F1, the load applied to the stepping motor 22 by the weft tension decreases. Therefore, the magnitude relationship of α> β regarding the yarn bending angles α and β and L1 <L2 regarding the distances L1 and L2 is effective in suppressing the load torque in the stepping motor 22 and suppressing a rapid tension increase.

(1-3) As the yarn bending angle α is larger than the yarn bending angle β, the load applied to the first guide ring 24 by the weft tension becomes larger, and the first guide is used to suppress the rapid tension increase. The ratio shared by the ring 24 side increases. The magnitude relationship of α> β regarding the yarn bending angles α and β increases the ratio in which the suppression of the rapid tension increase is shared by the first guide ring 24 side. The larger the share of the first guide ring 24 with respect to the suppression of the sudden tension increase, the easier the suppression of the load torque in the stepping motor 22.

(1-4) The distance relationship (L1 <L2) between the rotation axis 222 and the guide rings 24, 25 is advantageous in obtaining the weft pullback amount with a small rotation amount of the stepping motor 22.

(1-5) When the yarn path changing body 23 moves from the weft insertion position to the weft braking position, that is, when the weft Y1 moves from the first yarn path to the second yarn path, the first
The guide ring 24 moves from the downstream side to the upstream side of the yarn path. During this movement, the first guide ring 24 moves in the rotation direction of the stepping motor 22. That is, the first guide ring 24 approaches the first yarn guide 17 in the direction of the first yarn path. However, such a relative movement relationship between the first thread guide 17 and the first guide ring 24 causes the stepping motor 22 to move.
Is advantageous in increasing the yarn bending angle α in the first guide ring 24 with a small rotation amount.

(1-6) As shown in FIG. 1 (a), when the weft Y1 is in the first yarn path, the distance L3 between the first yarn guide 17 and the first guide ring 24 is It is smaller than the distance L4 between the second yarn guide 21 and the second guide ring 25. As shown in FIG. 3, the size relationship of L3 <L4 does not change even when the weft Y1 is in the second yarn path. In FIG. 3, as the second yarn guide 21 increases L4 in the weft inserting direction from the second guide ring 25, the yarn bending angle β decreases. Further, in FIG. 3, as the first yarn guide 17 reduces the L3 in the weft inserting direction with respect to the first guide ring 24, the yarn bending angle α increases. Therefore, the distance relationship of L3 <L4 is effective in making a difference in the yarn bending angles α and β when the weft yarn Y1 is in the second yarn path.

(1-7) The rotation axis 222 is shown in FIG.
As described above, the yarn path changing body 23 is set at a position displaced below the central axis of the yarn path 231. That is, the yarn path changing body 23 moves the first yarn path to the second yarn path for braking the weft.
When the first guide ring 24 rotates so as to approach the first yarn guide 17, the rotation axis 222 is perpendicular to the central axis of the yarn passage 231 when it is rotated so as to take the yarn path. Set to the displaced position. The setting position of the rotation axis 222 is set by the stepping motor 2
This is advantageous in increasing the yarn bending angle α with a small rotation amount of 2.

(1-8) The compression spring 20 constituting the weft-insertion resistance applying means further reduces the tension at the end of the weft insertion as compared with that at the time of braking, and suppresses the tension increase at the end of the weft insertion. Therefore, the suppression of the tension increase at the end of weft insertion using both the spring force of the compression spring 20 and the bending resistance is superior to the suppression of the tension increase at the end of weft insertion by only the bending resistance. That is,
The weft insertion control utilizing both the spring force and the bending resistance of the compression spring 20 reduces the tension increase at the end of the weft drawing.

(1-9) The elastic force of the compression spring 20 is suitable for suppressing a sharp increase in tension at the end of the weft flight. (1-10) Guide rings 24 and 2 which are a pair of conflicting bodies
When the yarn 5 is on the line connecting the pair of yarn guides 17 and 21, the weft yarn Y1 is on the first yarn path. That is, when the weft Y1 is in the linear first yarn path, the pair of guide rings 24 and 25 are on a line parallel to the first yarn path without touching the weft Y1. Higher weft insertion speed is essential for higher loom speed. The non-contact state between the pair of guide rings 24 and 25 and the weft yarn Y1 eliminates an extra weft-insertion resistance that hinders an increase in the weft-insertion speed.

(1-11) The degree of bending in the second yarn path can be controlled in multiple stages by adjusting the rotational position of the yarn path changing body 23, that is, adjusting the rotational position of the stepping motor 22. The stepping motor 22 uses the weft Y
It is suitable as a rotation drive means for finely adjusting the braking action on 1.

(1-12) The magnitude of the impact due to the tension increase at the end of weft insertion differs depending on the type of weft Y1 and the weave width. The magnitude of this impact can be reduced by appropriately setting the spring force of the compression spring 20 and the bending condition of the second yarn path. The structure that absorbs the impact due to the tension increase at the end of weft insertion by both the spring force of the compression spring 20 and the bending condition of the second yarn path is finer than the conventional impact relaxation by only the bending condition of the yarn path. Allows adjustment.

(1-13) The adjustment of the bending path length of the second yarn path, that is, the adjustment of the size of the bending is performed by the thread path changing body 2
This can be easily done by adjusting the weft braking position of 3. The rotation driving means such as the stepping motor 22 is
It is suitable for adjusting the bending path length of the second yarn path, that is, for adjusting the size of the bending degree.

Next, a second embodiment shown in FIGS. 6 to 10 will be described. The same symbols are used for the same components as those in the first embodiment. As shown in FIGS. 6B and 7, the output shaft 221 of the stepping motor 22 penetrates the board portion 161 and protrudes toward the front surface side of the board portion 161, and the thread path is formed on the protruding portion of the output shaft 221. The change body 23A is fixed. As shown in FIG. 6A, a support cylinder 28 is arranged immediately above the yarn path changing body 23A. The support cylinder 28 is fixed to the substrate 161, and a part of the movable body 29 is slidably fitted in the cylinder of the support cylinder 28. A compression spring 30 is interposed between the movable body 29 and the bottom of the support cylinder 28.

A second ceramic yarn guide 27 is fixed to the guide plate portion 165 of the support frame 16. First
Threading hole 171 of the thread guide 17 and the second thread guide 27
The threading hole 271 of No. 1 corresponds to the threading hole 171 when viewed in the hole direction. The positional relationship between the rotation axis 222, the yarn guides 17, 27 and the guide rings 24, 25 is substantially the same as that of the rotation axis 222, the yarn guides 17, 21 and the guide rings 24, 25 of the first embodiment. is there. The weft Y1 is
The first yarn path is formed between the first yarn guide 17 and the second yarn guide 27 when the weft is inserted, and the weft yarn Y1 does not contact the guide rings 24 and 25.

When the weft insertion of the weft Y1 is approached, the control device 15 steps the yarn path changing body 23A so as to rotate from the weft insertion position of FIG. 6A to the weft braking position of FIG. The operation of the motor 22 is controlled. In the state where the yarn path changing body 23A is in the weft braking position shown in FIG.
1 is thread guides 17 and 27 and guide rings 24 and 25
The first thread guide 17 and the second thread guide 2
A second yarn path having a bent shape with respect to 7 is taken. The weft tension at this time moves the movable body 29 against the spring force of the compression spring 30. In the state of FIG. 8, the guide rings 24, 25
The size relationship between the yarn bending angles α and β in α is α> β.

When the electromagnetic solenoid 12 is demagnetized and the locking pin 121 engages with the bobbin winding surface 112, the unwinding and unwinding of the weft Y1 is blocked and the weft insertion is completed. The tension increase at the end of weft insertion is against the spring force of the compression spring 30 and the movable body 2
9 is further moved from the state of FIG. FIG. 9 shows the upward movement of the movable body 29 due to the tension increase at the end of weft insertion.

When it is necessary to draw the weft yarn waiting for weft insertion into the main nozzle for weft insertion, the controller 15
After the weft Y1 inserted into the weft is cut and separated from the woven fabric (not shown), the yarn path changing body 23A is moved from the weft braking position in FIGS. 8 and 9 to the pullback position in FIG. 10, that is, the third yarn path. The operation of the stepping motor 22 is controlled so that the stepping motor 22 is rotated. The yarn path between the first yarn guide 17 and the second yarn guide 27 in the state of FIG. 10 is in a bent state larger than that of the second yarn guide in the state of FIG. Therefore,
The weft Y1 from the second yarn guide 27 to the weft insertion main nozzle 13A is pulled back to the weft measuring and storing device 11 side,
Weft Y1 waiting for weft insertion is the main nozzle 13A for weft insertion.
Be drawn in.

The yarn path changing body 23A, the pair of guide rings 24 and 25, and the stepping motor 22 constitute a yarn path changing means. The compression spring 30 is an elastic biasing unit that elastically biases the movable body 29 from the second yarn path side toward the first yarn path side. The support cylinder 28 is a support unit that supports the stationary end of the compression spring 30. The movable body 29, the support cylinder 28, and the compression spring 30 have a weft-insertion resistance that increases as the movement of the weft Y1 from the first yarn path increases.
A weft-insertion resistance imparting means is imparted to the weft yarn Y1 via 9

Also in the second embodiment, the same effect as in the first embodiment can be obtained. Next, a third embodiment shown in FIGS. 11 to 15 will be described. The same components as those in the first and second embodiments are designated by the same reference numerals.

A leaf spring 31 is fixed to the upper end of the yarn path changing body 23. The leaf spring 31 extends in front of the second guide ring 25 along the passage direction of the thread passage 231. A ring-shaped movable guide 3 is attached to the tip of the leaf spring 31.
2 is fastened. The movable guide 32 is made of ceramics. When the leaf spring 31 is in the natural state, the threading hole 321 of the movable guide 32 overlaps with the thread passage 231 when viewed in the passage direction of the thread passage 231. The weft Y1 includes a first yarn guide 17, a guide ring 24 which is a first contact member,
The yarn passage 231, the guide ring 25, the movable guide 32, which is the second contact member, and the second yarn guide 27 are passed through.

The positional relationship among the rotation axis 222, the yarn guides 17, 27, the guide ring 24 and the movable guide 32 is as follows.
The rotation axis 222, the yarn guides 17, 2 of the first embodiment
1 and the guide rings 24 and 25 are substantially the same.
The weft yarn Y1 includes a first yarn guide 17 and a second yarn guide 27.
The first weft yarn path during weft insertion, which is a straight line shape, is formed between and, and the weft yarn Y1 does not contact the guide rings 24 and 25.

11 (a) and 11 (b) show the state immediately before the start of weft insertion. Immediately before the weft insertion of the weft Y1 is started, the yarn path changing body 23 is set to the weft insertion position in which the passage direction of the yarn passage 231 is the same as the direction of the threading hole 171 of the yarn guide 17. When the yarn path changing body 23 is at the weft inserting position, the thread passing hole 17 of the first yarn guide 17 is provided.
1, thread passing hole 271 of the second thread guide 27, thread passage 23
1 and the threading hole 321 of the movable guide 32 is
When viewed in the hole direction of the threading holes 171, 271 of 7, 27, they overlap. In this state, the weft Y1 takes a first yarn path that is a linear shape between the first yarn guide 17 and the second yarn guide 27, and the weft Y1 is guided by the guide rings 24 and 25 and the movable guide 32. Never come into contact with.

When the weft insertion of the weft Y1 is approached, the control device 15 causes the yarn path changing body 23 to move to the first position shown in FIG.
The operation of the stepping motor 22 is controlled so as to be rotationally arranged from the second yarn path which is the weft braking position in FIG. When the yarn path changing body 23 is in the weft yarn braking position in FIG. 13, the weft yarn Y1 contacts the first yarn guide 17 and the second yarn guide 17 while contacting the yarn guides 17, 27, the guide rings 24, 25 and the movable guide 32. A bent shape is formed between the yarn guide 27 and the yarn guide 27. At this time, the leaf spring 31 is flexibly deformed by the weft tension. In the state of FIG. 13, the guide ring 2
The relationship between the yarn bending angles α and β between the movable guide 32 and the movable guide 32 is α> β.

Thread path changing body 23, guide rings 24, 2
5, the movable guide 32, and the stepping motor 22 constitute a yarn route changing unit that changes the yarn route of the weft Y1 between the first yarn route and the second yarn route. Movable guide 32
Is a movable body that comes into contact with the weft Y1 moving between the first yarn path and the second yarn path. The guide ring 24 and the movable guide 32 have the weft Y at least on the second yarn path side.
It becomes a conflicting body that is moved between the first yarn path and the second yarn path while touching 1. The leaf spring 31 is an elastic biasing unit that elastically biases the second yarn guide 27 from the first yarn path side toward the second yarn path side. The yarn path changing body 23,
It is a support means for supporting the stationary end of the leaf spring 31. Through the second yarn guide 27, the yarn path changing body 23, the leaf spring 31, and the movable guide 32 increase the weft insertion resistance that increases as the displacement of the weft yarn Y1 from the first yarn path increases.
The weft-insertion resistance imparting means imparted to No. 1 is constructed.

The increase in tension at the end of weft insertion pulls the movable guide 32 downward from the state of FIG. 13 against the spring force of the leaf spring 31. FIG. 14 shows the downward movement of the movable guide 32 due to the tension increase at the end of weft insertion. The yarn path changing body 23 is further rotated, and the third yarn path shown by the chain line in FIG. 15 is in a bent state larger than the second yarn path in the state of FIG. For this reason, the weft Y1 extending from the second yarn guide 27 to the weft inserting main nozzle 13A is the weft measuring and storing device 1
The leading end of the weft yarn Y1 that has been pulled back to side 1 and is on standby for weft insertion is drawn into the weft insertion main nozzle 13A.

The spring force of the leaf spring 31 plays the same role as that of the compression spring 20 in the first embodiment and the compression spring 30 in the second embodiment. Also in the third embodiment, the same effect as in the case of the first embodiment can be obtained.

In the fourth embodiment of FIG. 16, a thread groove 232 is formed in the yarn path changing body 23, and the leaf spring 31 is inserted in and supported by the thread groove 232. A screw 33 is screwed onto the yarn path changing body 23. Screw 3
The tip end of 3 is brought into contact with the base end portion of the leaf spring 31, and the base end portion of the leaf spring 31 is fixed to the yarn path changing body 23 in the insertion groove 232 by tightening the screw 33. . The leaf spring 31 can adjust its position in the insertion groove 232 in a state where the screw 33 is loosely tightened. By this adjustment, the extension length of the leaf spring 31 from the tip of the yarn path changing body 23 is adjusted, and the spring force of the leaf spring 31 is adjusted.

In the fourth embodiment, the spring force of the leaf spring 31 can be adjusted easily and finely.
The effect of the item (1-12) in the first embodiment is further improved.

In the fifth embodiment of FIG. 17, a ceramic guide pipe 34 is attached to the yarn path changing body 23. The guide pipe 34 serves as both the first conflict body and the second conflict body. The positional relationship among the rotation axis 222, the yarn guides 17 and 27, and the guide pipe 34 is
The rotation axis 222, the yarn guides 17, 2 of the first embodiment
1 and the guide rings 24 and 25 are substantially the same.
As shown by the chain line in FIG. 17, when the yarn path changing body 23 is arranged in the second yarn path which is the weft braking position, the magnitude relationship between the yarn bending angles α and β in the guide pipe 34 is α.
> Β.

The following embodiments are possible in the present invention. (1) In the first to fifth embodiments, the yarn introduction port of the weft inserting main nozzle is used as the second yarn guide.

(2) An air spring or magnetic force is used as the weft insertion resistance imparting action of the weft insertion resistance imparting means. (3) Use a servo motor as the rotation driving means.

Inventions other than the claims which can be understood from the above-described embodiments will be described below. (4) In the first embodiment, the second yarn guide is a fixed guide.

(5) In the second embodiment, the support cylinder 28,
It should be carried out in a form that does not include a weft-insertion resistance imparting means including a movable body 29 and a compression spring 30. (6) In the first embodiment, L1> L2 and L3
The magnitude relation of> L4 is set, and the rotation direction of the stepping motor 22 is opposite to that in the case of the first embodiment [ie,
1 (a) in the clockwise direction]. In this case, the second guide ring 25 serves as the first conflict body and the first guide ring 24 serves as the second conflict body. That is, the first conflict body is arranged downstream of the second conflict body.

[1] Any one of claims 1 to 6
In the paragraph (1), a movable body that comes into contact with a weft that moves between the first yarn path and the second yarn path by the yarn path changing means is provided, and the weft moves from the first yarn path. Is provided with weft-insertion-resistance imparting means for imparting a weft-insertion resistance that increases as the value increases, and the movable body moves between the first yarn path and the second yarn path. A weft insertion control device in a jet loom, which is movable only by the weft tension at the time of contact with the weft.

[2] In the above item [1], the weft-insertion resistance imparting means includes a yarn guide as the movable body through which the weft yarns pass while contacting the weft yarns at least on the second yarn path side, and the second Elastic biasing means for elastically biasing the thread guide from the thread path side toward the first thread path side to impart weft insertion resistance to the weft thread, and a support for supporting a stationary end of the elastic biasing means. A weft insertion control device in a jet loom, wherein the supporting means is immovably arranged.

[3] In the item [1], the weft-insertion resistance imparting means includes a movable body that comes into contact with the weft yarn at least on the second yarn path side, and the first yarn from the second yarn path side. The elastic body for elastically urging the movable body toward the yarn path side, and the supporting means for supporting the stationary end of the elastic urging means. Weft insertion control device.

[4] Any one of claims 1 to 6
In the paragraph (1), a movable body that comes into contact with a weft that moves between the first yarn path and the second yarn path by the yarn path changing means is provided, and the weft moves from the first yarn path. A weft insertion control device in a jet loom, comprising a weft insertion resistance applying means for applying a weft insertion resistance that increases as the value increases, via the movable body, wherein at least one of the contact bodies is the movable body.

[5] In claim 2, the weft yarn is first
When moving from the second yarn path to the second yarn path, the second contact member moves from the downstream side to the upstream side and moves away from the second yarn guide.

[6] Claims 1 to 6, and [1]
In any one of paragraphs [5] to [5], the first yarn path has a linear shape, and the first yarn path has a first shape when viewed from a direction orthogonal to both the first yarn path and the rotation axis. A weft insertion control device in a jet loom in which a yarn path and a rotation axis line are orthogonal to each other.

[7] Claims 1 to 6, and [1]
In any one of the items [6] to [6], the rotation driving means is a weft insertion control device in a jet loom which is a stepping motor.

[0072]

As described in detail above, in the present invention, when the weft yarn is in the second yarn path, the yarn bending angle in the first contact member is smaller than the yarn bending angle in the second contact member. Since it is also made large, it has an excellent effect of suppressing an increase in tension of the weft while suppressing a load torque.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing the first embodiment. (B) is the sectional view on the AA line of (a).

FIG. 2 is a sectional view taken along line BB of FIG.

FIG. 3 is a side sectional view of an essential part when the yarn path changing body 23 is at a weft braking position.

FIG. 4 is a side sectional view of an essential part when the yarn path changing body 23 is at a weft braking position.

FIG. 5 is a side cross-sectional view of a main portion when the yarn path changing body 23 is at the pullback position.

FIG. 6 shows a second embodiment, wherein (a) is a partially cutaway side view. (B) is CC sectional view taken on the line of (a).

FIG. 7 is a sectional view taken along line DD of FIG.

FIG. 8 is a side cross-sectional view of a main part when the yarn path changing body 23A is at the weft braking position.

FIG. 9 is a side sectional view of an essential part when the yarn path changing body 23A is at the weft braking position.

FIG. 10 is a side cross-sectional view of an essential part when the yarn path changing body 23A is at the pullback position.

FIG. 11 shows a third embodiment, (a) is a partially cutaway side view. (B) is the EE sectional view taken on the line of (a).

FIG. 12 is a sectional view taken along line FF of FIG.

FIG. 13 is a side cross-sectional view of a main portion when the yarn path changing body 23 is at the weft braking position.

FIG. 14 is a side cross-sectional view of a main part when the yarn path changing body 23 is at a weft braking position.

FIG. 15 is a side cross-sectional view of a main portion when the yarn path changing body 23 is at the pullback position.

FIG. 16 is a side sectional view of a main part showing a fourth embodiment.

FIG. 17 is a front cross-sectional view of an essential part showing the fifth embodiment.

[Explanation of symbols]

11 ... Weft measuring and storing device. 13A, 13B ... Main nozzles for weft insertion. 17 ... First thread guide. 21, 27 ... Second
Thread guide. 22 ... A stepping motor as a rotation driving unit that constitutes a yarn path changing unit. 222 ... axis of rotation.
23, 23A ... A yarn path changing body which constitutes a yarn path changing means. 24 ... A first guide ring as a first contact member that constitutes the yarn path changing means. 25 ... A second guide ring as a second contact member that constitutes the yarn path changing means. 32 ...
A movable guide as a second conflicting body. 34 ... First and second
Guide pipe as a conflicting body.

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Claims (6)

[Claims] 1. In a jet loom in which wefts are inserted by a fluid jetting action of a nozzle, a first yarn path, which is a weft path at the time of weft insertion between the weft measuring storage device and the nozzle, and the first yarn path. Yarn path changing means for changing the yarn path of the weft yarn between the second yarn path and the second yarn path that provides a weft inserting resistance larger than the weft inserting resistance in the yarn path, and is arranged upstream of the yarn path changing means. A first yarn guide and a second yarn guide disposed downstream of the yarn route changing means are provided, and the yarn route changing means touches the weft yarn at least on the second yarn route side. While rotating the first and second conflict bodies, which are moved between the first yarn path and the second yarn path, and the first and second conflict bodies integrally by a rotational force A rotation axis of the rotation driving means, comprising: The position is set between the pair of conflict bodies, and the distance between the rotation axis and the first conflict body is smaller than the distance between the rotation axis and the second conflict body. The arrangement relationship between the pair of yarn guides and the pair of conflicting bodies is such that when the weft yarn is in the second yarn path, the yarn bending angle in the first conflicting body is in the second conflicting body. A weft insertion control device in a jet loom that is designed to be larger than the yarn bending angle. 2. The first conflicting body is disposed upstream of the second conflicting body, and is located between the pair of thread guides.
Is a linear path, and when the weft thread moves from the first thread path to the second thread path, the first contact body moves from the downstream side to the upstream side and the rotational drive is performed. 2. The weft insertion control device in a jet loom according to claim 1, wherein the weft insertion control device approaches the first yarn guide in the rotation direction of the means. 3. The distance between the first thread guide and the first contact member is smaller than the distance between the second thread guide and the second contact member. Item 3. A weft insertion control device in a jet loom according to Item 2. 4. The rotation axis is set at a position displaced from the first yarn path, and the rotation direction of the rotation drive means when moving the weft yarn from the first yarn path to the second yarn path. Means that the first contact member moves from the position of the first yarn path to the rotation axis position side, and the second contact member moves from the position of the first yarn path to the opposite side to the rotation axis position. The weft insertion control device in a jet loom according to claim 3, wherein the weft insertion control device is a direction in which the weft insertion direction is a direction toward which the weft insertion control device moves. 5. The yarn path changing means sets a first yarn path which is a weft path at the time of weft insertion and a weft insertion resistance so as to provide a weft insertion resistance larger than a weft insertion resistance in the first yarn path. The jet loom according to claim 4, wherein the weft yarn path is changed between the second yarn path that bends and the third yarn path that bends the weft thread more than the second thread path and pulls back the weft thread. Weft insertion control device. 6. The pair of contact bodies are guide rings for passing the weft thread, and the pair of guide rings contact the weft thread on the first thread path when the weft thread is on the first thread path. The weft insertion control device for a jet loom according to claim 1, wherein the weft insertion control device is in a non-operating position.