JP2002339193A - Weft insertion controller in jet loom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make small the increase in yarn tension at the completion of weft take-up. SOLUTION: Yarn guides 17, 21 are supported by a support frame 16 between the weft trap for measuring the weft length 11 and the main nozzle for weft insertion 13. A compression spring 20 energizes the yarn guide 21. A yarn route changer 23 is rotatably attached to the output axis 221 of a stepping motor 22 supported by the supporting frame 16. A couple of yarn guides 24, 25 are supported by the yarn route changer 23. The weft yarn Y is threaded through the yarn guides 17, 24, 25 and 21. When the yarn route changer 23 is allowed to turn anticlockwise around the output axis 221 from the real line position in the figure 1, the yarn route between the yarn guides 17 and 21 is bent. The tension of the weft yarn Y allows the yarn guide 21 to move against the force of the compression spring 20.

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 for a jet loom in which wefts are inserted by the injection action of a weft insertion nozzle.

[0002]

2. Description of the Related Art The end of weft flight in a jet loom is at the end of weft withdrawal from a weft measuring and storing device. It stops suddenly and raises the weft tension. A sudden increase in tension may result in weft breakage. Therefore, a weft insertion control device that applies braking to the weft when the weft insertion is about to be completed and suppresses a sudden increase in tension is used.

A weft insertion control device of this kind is disclosed in Japanese Patent Laid-Open No. 5-98.
539, JP-A-6-184868, JP-A-7-48760, and Japanese Patent Application No. 10-507516. In these weft insertion control devices, a linear member switched between a position that does not touch the weft and a position that touches the weft is driven by an actuator such as a rotary solenoid or a pulse motor. The braking on the weft near the end of the weft insertion is caused by the bending resistance of the weft bent by the linear member disposed at a position in contact with the weft.

[0004]

The tension when the weft is braked and the tension when the weft is pulled out from the weft measuring and storing device are received by the torque of the actuator, but only by the torque of the actuator. Tension absorption is difficult. That is, it is difficult to reduce the rise in tension at the end of weft withdrawal, that is, at the end of weft insertion, only by the torque of the actuator.

[0005] It is an object of the present invention to reduce a rise in tension at the end of weft withdrawal.

[0006]

For this purpose, according to the first aspect of the present invention, the first yarn path and the second yarn path which provide a weft insertion resistance greater than the weft insertion resistance in the first yarn path. Yarn path changing means for changing the yarn path of the weft between
A moving body that comes into contact with the weft moving between the first yarn path and the second yarn path by the yarn path changing means, and the movement of the weft from the first yarn path increases; And a weft insertion resistance applying means for applying, via the movable body, a weft insertion resistance that increases with the weft insertion resistance, wherein the yarn path changing means contacts the weft at least on the second yarn path side. A contact body that is moved between the yarn path and the second yarn path; and a rotation drive unit that moves the contact body by a rotational force, wherein the movable body includes the first yarn path and the second thread path. It can be moved only by the weft tension at the time of contact with the weft that moves between the two yarn paths.

[0007] The weft is transferred to the second yarn path near the end of the weft insertion. Although the weft tension at this time is the same, the load applied to the yarn route changing means increases due to this tension.
That is, the load on the yarn route changing means when the weft yarn is transferred to the second yarn route is higher than when the weft yarn is transferred to the first yarn route.
This increase in load reduces the weft insertion speed, and suppresses a sharp increase in tension at the end of weft insertion.

[0008] In the invention of claim 2, in claim 1,
The conflicting body is a pair of thread guides for passing the weft, and the pair of thread guides are located at positions where the weft is not in conflict with the weft on the first thread path when the weft is on the first thread path. As in

When the weft is on the first yarn path, the pair of yarn guides does not conflict with the weft. The non-contact state between the pair of yarn guides and the weft, which are the contact bodies, reduces the weft insertion resistance.

According to a third aspect of the present invention, in any one of the first and second aspects, the weft insertion resistance applying means is configured to pass the weft while causing the weft to pass at least on the second yarn path side. A yarn guide as a body, elastic urging means for elastically urging the yarn guide from the second yarn path side toward the first yarn path side to impart weft insertion resistance to the weft, And a supporting means for supporting an immovable end of the elastic urging means, wherein the supporting means is immovably arranged.

The elastic urging force of the elastic urging means acts on the weft via the yarn guide. The elastic force of the weft insertion resistance applying means suppresses a sharp rise in tension at the end of the weft flight. According to a fourth aspect of the present invention, in the third aspect, the yarn guide constituting the weft insertion resistance applying means is disposed downstream of the conflicting body.

The elastic urging force of the elastic urging means acts on the weft via a movable yarn guide disposed downstream of the conflicting body. In the invention of claim 5, claim 1 and claim 2
In any one of the above, the weft insertion resistance imparting means,
A movable body that contacts the weft at least on the second yarn path side, and elastic biasing means that elastically biases the movable body from the second yarn path side toward the first yarn path side; Supporting means for supporting a stationary end of the elastic urging means,
The support means is immovably arranged.

The elastic urging force of the elastic urging means acts on the weft via the movable body. The elastic force of the weft insertion resistance applying means is
Suppress sharp rise in tension at the end of weft flight.

[0014]

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

In FIG. 1 (a), reference numeral 11 denotes a winding type weft measuring and storing device, in which a weft Y is wound and stored on a yarn winding surface 112 by rotation of a yarn winding tube 111. Pin winding surface 11
The weft yarn Y wound and stored on the upper surface 2 is drawn out by the injection action of the weft insertion main nozzle 13 while being released from the locking action of the locking pin 121 driven by the electromagnetic solenoid 12. The locking pin 121 is an electromagnetic solenoid 1
2 is released from the thread winding surface 112 based on an excitation command of the control device 15 for the second. The ejection of the weft insertion main nozzle 13 and the release of the locking pin 121 are performed at substantially the same timing.

A reflection type photoelectric sensor type weft unwinding detector 14 is installed near the yarn winding surface 112. The weft unwinding detector 14 detects a winding yarn unwound from the yarn winding surface 112 and unwound, and this detection signal is sent to the control device 15. When the number of times of unwinding of the wound yarn reaches a predetermined number, the control device 15 commands the demagnetization of the electromagnetic solenoid 12, and the locking pin 121 engages with the yarn winding surface 112. When the locking pin 121 is engaged with the yarn winding surface 112, the weft is not pulled out.

A support frame 16 is provided between the weft length measuring and storing device 11 and the weft insertion main nozzle 13. The support frame 16 includes a flat plate-shaped substrate portion 161, a guide plate portion 162 integrally formed at an end of the substrate portion 161 on the side of the weft measuring and storing device 11, and a weft insertion main nozzle 1 of the substrate portion 161.
And a support block 163 integrally formed at the end on the third side. A ring-shaped thread guide 17 is provided on the guide plate portion 162.
Is fixed. A support hole 164 is recessed at the upper end of the support block 163, and a part of the slider 18 is slidably fitted in the support hole 164. A ring-shaped thread guide 21 is fixed to the slider 18.

A spring receiver 19 is fixed to the substrate portion 161 so as to face the slider 18, and a compression spring 20 is interposed between the spring receiver 19 and the slider 18. The compression spring 20 urges the slider 18 in a direction of pushing the slider 18 into the support hole 164. The direction of the threading hole 171 of the thread guide 17 and the direction of the threading hole 211 of the thread guide 21 are the same. The slider 18 is supported by the support hole 16.
4, the threading hole 171 of the thread guide 17 and the threading hole 211 of the thread guide 21 partially overlap when viewed in the direction of the threading hole 171.

As shown in FIGS. 1B and 2, a stepping motor 22 is mounted on the back surface of the substrate 161. The output shaft 221 of the stepping motor 22 is
The output shaft 221 penetrates the substrate 161 and protrudes toward the front side of the substrate 161. A thread path changer 23 is fixed to the projection of the output shaft 221. A straight thread passage 231 penetrates the thread path changing body 23, and ring-shaped thread guides 24 and 25 are fitted and fixed to both openings of the thread passage 231. Threading holes 241 and 251 of the thread guides 24 and 25
Overlaps with the yarn passage 231 when viewed in the direction of the yarn passage 231. The yarn path changing body 23 is a stepping motor 2
2 together with the output shaft 221. The weft Y is formed by a yarn guide 17, a yarn guide 24, a yarn passage 231,
It is passed through the yarn guide 25 and the yarn guide 21.

Stepping motor 2 which is a rotary driving means
2 is controlled by the control device 15. The control device 15
The operation of the stepping motor 22 is controlled based on loom rotation angle detection information obtained from the rotary encoder 26 that detects the rotation angle of the loom. FIGS. 1 (a) and 1 (b)
This shows the state immediately before the start of weft insertion. Immediately before the weft insertion of the weft Y is started, the yarn path changing body 23 is set at the weft insertion position where the passage direction of the yarn passage 231 is the same as the hole direction of the threading hole 211. When the passage direction of the thread passage 231 is in the same direction as the hole direction of the threading hole 211, the threading hole 171 of the thread guide 17 and the threading hole 211 of the thread guide 21 are provided.
The thread passage 231 partially overlaps when viewed in the hole direction of the threading hole 211. In this state, the weft Y takes a first yarn path in a linear shape between the yarn guide 17 and the yarn guide 21, and the weft Y does not contact the yarn guides 24, 25, 21.

The first yarn path between the yarn guides 17 and 21 has a linear shape. As shown in FIG. 1B, when viewed from a direction orthogonal to both the first yarn path and the rotation axis 222 of the stepping motor 22, the first yarn path is orthogonal to the rotation axis 222. ing. The rotation axis 222 of the stepping motor 22 is set below the first yarn path and at a position closer to the yarn guide 24 on the upstream side than the yarn guide 25 on the downstream side.

When a predetermined loom rotation angle is reached, the control device 15 commands the electromagnetic solenoid 12 to be excited,
1 is detached from the thread winding surface 112. Further, the weft insertion main nozzle 13 jets, and the weft Y released from the locking action of the locking pin 121 is jetted from the weft insertion main nozzle 13.

Near the end of weft insertion of the weft Y, the control device 15 controls the stepping motor so that the yarn path changing member 23 is pivotally disposed from the weft insertion position in FIG. 1A to the braking position in FIG. 22 is controlled. In a state where the yarn path changing body 23 is at the braking position in FIG.
A second thread path having a bent shape is taken between the thread guide 17 and the thread guide 21 while contacting 7, 24, 25, 21. The weft tension at this time moves the yarn guide 21 and the slider 18 against the spring force of the compression spring 20.

The yarn path changing body 23, the yarn guides 24 and 25, and the stepping motor 22 include a first yarn path and a second yarn path that provides a weft insertion resistance greater than the weft insertion resistance in the first yarn path. The yarn path changing means for changing the yarn path of the weft Y between the two. The yarn guides 24, 25 contact the weft Y at least on the second yarn path side, and
The contact body is moved between the first thread path and the second thread path. The yarn guide 21 downstream of the pair of yarn guides 24 and 25, which are the conflicting members, is a movable body that comes into contact with the weft Y moving between the first yarn path and the second yarn path. Compression spring 2
Numeral 0 denotes an elastic urging means for elastically urging the yarn guide 21 from the second yarn path side to the first yarn path side. The spring receiver 19 is a supporting means for supporting the stationary end of the compression spring 20. The slider 18, the yarn guide 21, the spring receiver 19, and the compression spring 20 provide a weft insertion resistance to the weft Y via the yarn guide 21 that increases the weft insertion resistance that increases as the movement of the weft Y from the first yarn path increases. It constitutes resistance applying means.

When the electromagnetic solenoid 12 is demagnetized and the locking pin 121 engages with the thread winding surface 112, the unwinding of the weft Y is prevented and the weft insertion is completed. The tension increase at the end of weft insertion is caused by the yarn guide 2 against the spring force of the compression spring 20.
The slider 1 and the slider 18 are further moved from the state shown in FIG. FIG.
Represents upward movement of the yarn guide 21 due to a rise in tension at the end of weft insertion.

In the case of multicolor weft insertion, if the wefts waiting for weft insertion protrude from the nozzle end of the adjacent main weft insertion nozzle, they may be entangled with the weft inserted.
Therefore, it is necessary to draw the weft waiting for weft insertion into the main nozzle for weft insertion. In this case, the control device 15
The stepping motor moves the yarn path changing member 23 from the braking position shown in FIGS. 3 and 4 to the retracted position shown in FIG. 5 after the inserted weft Y is cut and separated from the woven cloth (not shown). 22 is controlled. The yarn path between the yarn guide 17 and the yarn guide 21 in the state shown in FIG. 5 is in a more bent state than the second yarn path in the state shown in FIG.
Therefore, the weft Y from the yarn guide 21 to the weft insertion main nozzle 13 is pulled back to the weft length measuring and storing device 11 side, and the leading end of the weft Y waiting for weft insertion is inserted into the weft insertion main nozzle 13.
Drawn into.

In the first embodiment, the following effects can be obtained. (1-1) In a state where the weft Y is inserted along the first yarn path shown in FIG. 1A, the path of the weft Y between the yarn guides 17 and 21 is controlled by the yarn guides 24, 25 and 21. It has a linear shape that does not contact Therefore, the weft insertion resistance received by the weft yarn Y inserted along the first yarn path is small. The load applied to the yarn path changing means when the weft yarn Y is shifted to the second yarn path near the end of the weft insertion is higher than in the first yarn path due to the change in the yarn path. That is, the bending resistance caused by the bent shape of the second yarn path and the spring force of the compression spring 20 impart a braking action to the weft Y during weft insertion. The increase in the load on the yarn path changing means by shifting the weft Y from the first yarn path to the second yarn path near the end of the weft insertion reduces the weft insertion speed of the weft Y,
A sharp rise in tension at the end of weft insertion is suppressed.

(1-2) The suppression of the rise in tension at the end of weft insertion only by the bending resistance without using the compression spring 20 depends on the absorption of the tension only by the torque of the stepping motor 22. However, it is difficult to absorb the tension only by the torque of the stepping motor 22 (the same applies to other motors and rotary driving means such as a rotary solenoid). Compression spring 2 constituting weft insertion resistance applying means
At the end of the weft insertion, the value of 0 is further reduced from that at the time of braking to suppress an increase in tension at the end of the weft insertion. Therefore, the compression spring 20
The suppression of the rise in tension at the end of weft insertion using both the spring force and the bending resistance is superior to the suppression of the rise in tension at the end of weft insertion using only the bending resistance. That is, the compression spring 2
The weft insertion control using both the spring force of 0 and the bending resistance reduces the rise in tension at the end of the weft withdrawal.

(1-3) The elastic force of the compression spring 20 constituting the weft insertion resistance applying means is suitable for suppressing a sharp increase in tension at the end of the weft flight. (1-4) When the yarn guides 24 and 25, which are a pair of conflicting members, are on a line connecting the yarn guides 17 and 21, the weft Y is on the first yarn path. That is, when the weft Y is in the linear first yarn path, the yarn guides 24 and 25, which are a pair of conflicting bodies, are on a line parallel to the first yarn path without conflicting with the weft Y. . In order to increase the speed of the loom, it is essential to increase the weft insertion speed. The non-contact state between the yarn guides 24 and 25 and the weft yarn Y eliminates extra weft insertion resistance that hinders an increase in the weft insertion speed.

(1-5) The degree of bending in the second yarn path can be controlled in multiple stages by adjusting the rotation position of the yarn path changer 23, that is, by adjusting the rotation position of the stepping motor 22. The stepping motor 22 is most suitable as a rotation driving means for finely adjusting the braking action on the weft Y.

(1-6) The magnitude of the impact due to the rise in tension at the end of weft insertion differs depending on the type of weft Y and the weaving width.
The magnitude of this impact depends on the spring force of the compression spring 20 and the second
Can be reduced by appropriately setting the degree of bending of the yarn path. The configuration in which the impact due to the increase in the tension at the end of the weft insertion is reduced by both the spring force of the compression spring 20 and the degree of bending of the second thread path is finer than the conventional impact relaxation using only the degree of bending of the thread path. Allow adjustment.

(1-7) The adjustment of the bending path length of the second yarn path, that is, the adjustment of the degree of bending is performed by the yarn path changing member 23.
It can be easily performed by adjusting the braking position of the motor. The rotation driving means such as the stepping motor 22 is optimal for adjusting the bending path length of the second yarn path, that is, for adjusting the size of the degree of bending.

Next, a second embodiment shown in FIGS. 6 to 10 will be described. The same reference numerals 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 substrate 161 and protrudes to the front side of the substrate 161. The change body 23A is fixed. As shown in FIG. 6A, a support cylinder 28 is disposed immediately above the yarn path changing body 23A. The support cylinder 28 is fixed to the substrate part 161, and a part of the movable body 29 is slidably fitted in the support cylinder 28. A compression spring 30 is interposed between the movable body 29 and the bottom of the support cylinder 28. The thread guide 27 is fixed to the guide plate 165 of the support frame 16. Thread guides 17, 24, 25,
27 are the same as those of the yarn guide 1 of the first embodiment.
7, 24, 25 and 21 are almost the same. Weft Y
Takes a first yarn path that is linear between the yarn guide 17 and the yarn guide 27, and the weft Y is
No contact with 25,27.

Near the end of weft insertion of the weft Y, the control device 15 controls the stepping motor so that the yarn path changing body 23A is pivotally disposed from the weft insertion position in FIG. 6A to the braking position in FIG. 22 is controlled. Thread path change body 23
In the state where A is at the braking position in FIG. 8, the weft yarn Y contacts the yarn guides 17, 24, 25 and 27 while
A second thread path having a bent shape is taken between the thread guide 27 and the thread guide 27. The weft tension at this time moves the movable body 29 against the spring force of the compression spring 30.

When the electromagnetic solenoid 12 is demagnetized and the locking pin 121 engages with the thread winding surface 112, the unwinding of the weft Y is prevented, and the weft insertion is completed. The tension increase at the end of weft insertion is caused by the movable body 29 against the spring force of the compression spring 30.
Is further moved from the state of FIG. FIG. 9 shows an upward movement of the movable body 29 due to a rise in tension at the end of weft insertion.

When it is necessary to draw the weft in standby for weft insertion into the main nozzle for weft insertion, the controller 15
The stepping motor moves the yarn path changing body 23A from the braking position in FIGS. 8 and 9 to the retracted position in FIG. 10 after the inserted weft Y is cut and separated from the woven cloth (not shown). 22 is controlled. The yarn path between the yarn guide 17 and the yarn guide 27 in the state of FIG. 10 is in a larger bent state than the second yarn path in the state of FIG. Therefore, the weft Y from the yarn guide 27 to the weft insertion main nozzle 13 is pulled back to the weft length measuring and storing device 11 side, and the weft Y waiting for weft insertion is moved to the weft insertion main nozzle 13.
Drawn into.

The yarn path changing body 23A, the yarn guides 24, 25
The stepping motor 22 constitutes a yarn path changing unit. The compression spring 30 is an elastic urging unit that elastically urges 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 are provided with weft insertion resistance applying means for applying a weft insertion resistance, which increases as the movement of the weft Y from the first yarn path increases, to the weft Y via the movable body 29. Is configured.

In the second embodiment, the same effects as (1-1) to (1-7) in the first embodiment can be obtained. Next, a third embodiment of FIG. 11 will be described. The same components as those in the first embodiment are denoted by the same reference numerals.

The yarn path changing body 31 is provided with yarn guides 24 and 25.
It has a space 311 that opens to the top between them. The space 311 facilitates the operation of passing the weft yarn Y through the yarn guides 24 and 25.

Next, a fourth embodiment shown in FIG. 12 will be described. The same components as those in the first embodiment are denoted by the same reference numerals. A bracket 32 is fixed to an upper end of the substrate portion 161, and a support piece 33 is fixed to the bracket 32 in a hanging state. A lever 34 is supported on the support piece 33 by a support shaft 34.
1 so as to be rotatable. The thread guide 25 is attached to one end of the lever 34, and the lever 3
A tension spring 3 is provided between the other end of the bracket 4 and the bracket 32.
5 are interposed. The extension spring 35 plays the same role as the compression spring 20 in the first embodiment.

Next, a fifth embodiment shown in FIGS. 13A and 13B will be described. The same components as those in the second embodiment are denoted by the same reference numerals. A pair of rod-shaped contact members 37 and 38 are provided upright on the yarn path changing member 36 fixed to the output shaft 221 of the stepping motor 22. The pair of contact members 37 and 38 are vertically shifted. FIG.
In the state (a), the weft Y takes a linear first yarn path between the yarn guides 17 and 21, and the weft Y and the contact body 3
7, 38 does not conflict. In a state where the yarn path changing body 36 is disposed at the braking position indicated by the chain line, the weft Y
A second thread path having a bent shape in contact with the conflicting bodies 37 and 38 is taken.

In this embodiment, the same effects as in the second embodiment can be obtained. In the present invention, the sixth
In this embodiment, the spring force of the compression springs 20, 30 can be adjusted as in the seventh embodiment shown in FIG.

In the sixth embodiment shown in FIG. 14, a spring seat 40 is slidably accommodated in a cylinder 39 fixed to the spring receiver 19, and the spring seat 19 is mounted on the spring receiver 19 so that the adjusting screw 41 passes therethrough. It is screwed. The compression spring 20 includes a spring seat 4.
0 and the slider 18. Spring seat 40
Can be adjusted by turning the adjusting screw 41,
The spring force of the compression spring 20 is adjusted.

In the seventh embodiment shown in FIG.
A spring seat 42 is slidably housed in 8, and is screwed to the bottom of the support cylinder 28 so that an adjustment screw 43 penetrates. The compression spring 30 is interposed between the spring seat 42 and the movable body 29. The position of the spring seat 42 can be adjusted by turning the adjustment screw 43, and the spring force of the compression spring 30 is adjusted.

In the sixth and seventh embodiments, the spring force of the compression springs 20 and 30 can be easily and finely adjusted, and the (1-6) of the first embodiment can be adjusted. The effect is further improved.

In the present invention, the following embodiments are also possible. (1) In the first to fourth embodiments, the sixth and seventh embodiments, the yarn guide 17 is omitted.

(2) In the first to fourth, sixth and seventh embodiments, the yarn guide 21 is omitted. (3) In the second to fourth embodiments, the sixth and seventh embodiments, the yarn guide 27 is omitted.

(4) An air spring or a magnetic force is used as the weft insertion resistance imparting action of the weft insertion resistance imparting means. (5) A servomotor is used as the rotation driving means.

The inventions other than those described in the claims which can be grasped from the above embodiments will be described below. [1] The first yarn path has a linear shape, and the first yarn path and the rotation axis are orthogonal to each other when viewed from a direction orthogonal to both the first yarn path and the rotation axis. The weft insertion control device for a jet loom according to any one of claims 1 to 4, wherein:

[2] The pair of conflicting members are separately arranged on the left and right sides of the rotation axis of the rotation driving means.
The jet loom according to any one of claims 1 to 4, wherein the rotation axis is set at a position closer to an upstream contact body than a downstream contact body of the pair of contact bodies. Weft insertion control device.

[3] The weft insertion control device for a jet loom according to any one of claims 1 to 4, wherein the rotation drive means is a stepping motor.

[0052]

As described above in detail, according to the present invention, at least the second thread path side is moved between the first thread path and the second thread path while being in contact with the weft; A yarn path changing means comprising: a rotation driving means for moving the conflicting body by a rotational force; and a weft moving between the first yarn path and the second yarn path by the yarn path changing means. And a weft insertion resistance applying means for applying, via the movable body, a weft insertion resistance that increases as the movement of the weft from the first yarn path increases. Since the body can be moved only by the weft tension at the time of contact with the weft moving between the first yarn route and the second yarn route, the rise in the tension at the time of preventing weft withdrawal can be reduced. It has an excellent effect.

[Brief description of the drawings]

FIG. 1 shows a first embodiment, in which (a) is a partially broken side view. (B) is a sectional view taken along line AA of (a).

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

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

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

FIG. 5 is a sectional side view of a main part when the yarn path changing body 23 is at a retracted position.

FIG. 6 shows the second embodiment, and (a) is a partially broken side view. (B) is a sectional view taken along line CC of (a).

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

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

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

FIG. 10 is a sectional side view of a main part when the yarn path changing body 23A is at a retracted position.

FIG. 11 is a sectional side view of a main part showing a third embodiment.

FIG. 12 is a front sectional view of an essential part showing a fourth embodiment;

FIG. 13 shows the fifth embodiment, and (a) is a partially cutaway side view. (B) is a sectional view taken along line EE of (a).

FIG. 14 is a sectional side view of a main part showing a sixth embodiment.

FIG. 15 is a sectional side view of a main part showing a seventh embodiment.

[Explanation of symbols]

18. Slider constituting weft insertion resistance applying means. 19 ...
A spring receiver constituting weft insertion resistance applying means. 20, 30, ...
A compression spring constituting a weft insertion resistance applying means. 21: A thread guide to be a movable body. 22 ... Stepping motor which constitutes a yarn path changing means. 23, 27, 31, 36... Yarn path changing members constituting the yarn path changing means. 24, 25: yarn guides constituting yarn route changing means. 28 ... A support cylinder constituting the weft insertion resistance applying means. 29. A movable body constituting a weft insertion resistance applying means.

Claims (5)

[Claims] 1. A jet loom for weft insertion by a jetting action of a weft insertion nozzle, wherein a first yarn path and a second yarn resistance that provides a weft insertion resistance greater than the weft insertion resistance in the first yarn path. Yarn path changing means for changing the yarn path of the weft between the first and second yarn paths; and a movable body contacting the weft moving between the first yarn path and the second yarn path by the yarn path changing means. And weft insertion resistance applying means for applying, via the movable body, a weft insertion resistance that increases as the movement of the weft from the first yarn path increases, and the yarn path changing means includes: A conflicting body that is moved between the first thread path and the second thread path while contacting the weft at least on the second thread path side; and a rotational drive that moves the conflicting body by a rotational force. With means The movable body is weft insertion control apparatus in a jet loom which is movable only by weft tension during contact with said weft moving between said second yarn route between said first yarn route. 2. The conflicting body includes a pair of thread guides for passing the weft, and the pair of thread guides are disposed on the first thread path when the weft 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 located at a position where the weft does not conflict with the weft. 3. The weft insertion resistance applying means includes a yarn guide as the movable body through which the weft passes while at least contacting the weft yarn on at least the second yarn path side, and the first yarn guide from the second yarn path side. An elastic urging unit that elastically urges the yarn guide toward the yarn path side to apply weft insertion resistance to the weft, and a supporting unit that supports an immovable end of the elastic urging unit,
The weft insertion control device for a jet loom according to any one of claims 1 and 2, wherein the support means is immovably arranged. 4. The weft insertion control device for a jet loom according to claim 3, wherein the yarn guide constituting the weft insertion resistance applying means is arranged downstream of the contact body. 5. The weft insertion resistance applying means includes: a movable body contacting the weft at least on the second yarn path side; and a moving body from the second yarn path side to the first yarn path side. 3. The apparatus according to claim 1, further comprising: an elastic urging means for elastically urging the movable body; and a supporting means for supporting a stationary end of the elastic urging means, wherein the supporting means is fixedly arranged. Item 4. A weft insertion control device for a jet loom according to the item [1].