DE60121702T2 - Weft insertion device for rapier looms - Google Patents

Description

Background of the invention

1. Field of the invention

The The present invention relates to a weft insertion device for a rapier loom.

2. Description of the related state of the technique

As in Japanese Patent Laid-Open Publication No. 3-137247 and the Japanese Patent Laid-Open Publication No. 5-209341 is disclosed enters in a weft insertion device, in which a gripper tape, on a gripper head is mounted around a gripper wheel wound around is, the rapier head a warp opening and withdraws from this, when the gripper wheel moves forward and turns backwards. The shot will go through at a pick-up standby position a Beschickungsgreiferkopf registered in the warp opening. The through the feed gripper head into the warp opening shot is sent to a receiving rapier head. The one to the host Rapier skillful shot is guided through the warp opening when the receiving rapier head retracts from the warp opening.

In order to the feeding of the shot from the loading rapier head to the receiving rapier head is successfully effected, it is for the loading rapier head and the receiving rapier head needed them in one stable way to move. Furthermore, the focus of the Gripper head above the movement distance of the rapier band. Consequently becomes when the rapier head is accelerated or decelerated, generates a torque around the center of gravity. As a result The rapier head tends to do so while the acceleration, and decelerates during deceleration the gripper head to lower.

In disclosed in Japanese Patent Laid-Open Publication No. 5-209341 Rapier weaving machine becomes the movement of rapier head and rapier band through a big one Number of spaced teeth led in a row a sley are arranged. The large number of spaced apart tooth to lead only the lower surfaces of the rapier head and the rapier band. This management structure fluctuates the moving gripper head vertical and the movement of the gripper head is pretty unstable.

Around used to prevent the unstable movement of the rapier head in Japanese Utility Model Laid-Open Publication No. 5-27070 disclosed rapier weaving two gripper guides for guiding the upper and lower surfaces of the rapier band. A gripper guide leads the Movement of the rapier band while they have a broad end of the rapier band stops. The other gripper guide leads the Movement of the rapier band while they the other broad end of the rapier band stops. In this leadership structure There is no vertical fluctuation of the moving rapier head on and the movement of the rapier head is stable.

however to press the front end portions of the two gripper guides, which are the broad ends of the rapier band, their way through the chain rows when the gripper head moves and they enter the warp opening. Furthermore is the distance between the front end portions of the two rapier guides in the warp stretching direction, that is, in the direction in which the reed swinging, bigger than the width of the rapier band, so that the front end portions the two gripper guides of projecting the ends of the rapier band outward into the warp opening. Further, the front end portion of a gripper guide (the hereinafter referred to as the first gripper guide) of one end of the rapier band to the side of Riets in the warp opening. The front end portion of the other gripper guide (the later as the second gripper guide is designated) from the other end of the rapier band in Direction of the binding front side of the fabric in the warp opening.

With this construction, when the second gripper guide enters or leaves the shed to prevent interference between the front end portion of the second gripper guide and the binding front side, and to prevent the gripper guide mark being generated in the woven fabric by pressing the warp in FIG As a result of the thickness of the gripper guide is caused, it is necessary to set the moving distance of the rapier band within the shed to a position which is farthest from the binding front. Further, when the distance between the front end of the first looper guide and the reed is short, the presence of the front end portion of the first looper guide projecting from one end of the looper band in the direction of the reed side into the warp opening causes a tear due to the thickness of the looper guide Wale streak is generated. Thus, it is necessary to move the most retracted position of the ream further away from the binding front. In this way, the range of vibration of the reed increases as the most retracted position of the reed from the bin the front of the building is moved away. The increase in the vibration range of the reed disadvantageously prevents the speed of the loom from being increased.

Further Weft insertion device according to the generic term of claim 1 are disclosed in US-A-5,413,151 and EP-A-0 715 009 disclosed.

SUMMARY THE INVENTION

It It is an object of the present invention to provide a weft insertion device for a rapier loom to provide an improvement in the motion stability of the rapier head even in the case of a construction using a guide that is guiding the rapier head or the rapier band in the warp opening only on the lower side of the band.

According to the present Invention, the above object is achieved with a weft insertion device, the has the features of claim 1. Further embodiments are in the dependent claims explained.

at this construction, in which the driving force application position on the rapier band is set to a position that is in nearby the center of gravity of the gripper head with respect to its vertical direction is located, the force applied to the gripper belt driving force substantially linearly along the position of the center of gravity of the rapier head transferred to the linear configuration of the rapier band. Thus, a vertical movement of the rapier head retained. Further, the reinforcing portion stops the linear configuration of the front end portion of the rapier band at and a deflection of the rapier band at the front end is prevented. The prevention of vertical movement of the rapier head and the deflection of the rapier band contributes to the stabilization of the Movement of the rapier head at. As a result, the movement is the gripper head merely by guiding the lower surface of the Rapier head or reinforcing section inside the warp opening stabilized.

It is also desirable that the reinforcing section formed as a recessed frame of a U-shaped configuration whose sectional configuration is seen in the longitudinal direction of the Gripper bands are designed to be wider than the lower ones area of the rapier band protrudes downwards. This is because of that such recessed frame provides a simple amplification section.

It is also desirable that the reinforcement frame one piece is formed of the same material as the rapier band. This not only simplifies the manufacturing process compared to the Case in which mounted on the rapier a separate section is, but realizes a hassle-free construction, in which Regarding the warp no scratches occurs.

Further is the length of the reinforcing section preferably half the thread guide stroke of the rapier head. In the first half of the entry process of the rapier head in the warp opening the gripper head is accelerated. In the later half of the entry process of the rapier head in the warp opening The rapier head is slowed down. In the first half of the Withdrawal process of the rapier head from the warp opening the gripper head is accelerated. In the later half of the retraction process of the rapier head from the warp opening The rapier head is slowed down. In the first half of the Entry process of the rapier head in the warp opening and in the later half of Retraction process of Gripper head from the warp opening It is likely that a lifting of the rapier head and a Bumps of the rapier band occur. However, the construction helps at the length of the reinforcing section at least half the thread guide stroke of the rapier head, to prevent lifting of the rapier head and buckling of the rapier band. The prevention of the lifting of the rapier head and the buckling of the gripper head Gripper bands carries in great extent to the Stabilizing the movement of the rapier head.

Further Is it possible, the reinforcement section and form the rapier band as separate components, wherein the rapier head at the front end of the reinforcing element or the rapier band added becomes. Furthermore, the gripper head can be provided with a guide frame, being a part of the guide frame extends to the reinforcing section to build. The sectional configuration of the reinforcing section may be bilateral be symmetrical or asymmetric on both sides.

Further it is particularly desirable that the driving force application position in the rapier band in the linear state is set to a position that is in nearby the height position the center of gravity of a combination of the rapier head and the amplifying section located. Furthermore, it is desirable that the height position of the center of gravity of the rapier head is set so that it is in the linear state within the range of the thickness of the rapier band falls. The height position the movement distance of the center of gravity from the combination of the rapier head and the reinforcing section may be from the range of the thickness of the rapier band in the linear Condition slightly up or down.

Further is the back half the deeper wall of the rapier head lower than the front half of this lower wall and the back half the lower wall may be at the bottom wall of the reinforcement section be secured by the rapier.

Further can the reinforcing section moreover, as a protruding frame of inverted U-shaped configuration be formed, the sectional configuration seen in the longitudinal direction of the rapier band is formed to be wider than the upper one area of the rapier band protrudes upward.

Further can the reinforcing section to be most balanced when a figure is used in the sectional shape of the reinforcing portion forming rapier band is symmetrical in the vertical direction.

SUMMARY THE DRAWINGS

1A and 1B 10 are diagrams showing a weft insertion apparatus for a rapier loom according to a first embodiment of the present invention, wherein FIG 1A a partially omitted front view is and 1B is a perspective view of the front end portion of a rapier band;

1 Fig. 10 is a perspective view of a loading rapier head;

3A is a side view of the loading rapier head and 3B is a sectional view taken along the line AA 3A ;

4A FIG. 10 is a plan view of the loading rapier head; FIG. 4B is a sectional view taken along the line BB of 4A and 4C is a sectional view taken along the line CC of 4A ;

5 is a perspective view of a receiving rapier head;

6A is a side view of the receiving rapier head and 6B is a sectional view taken along the line DD of 6A ;

7A is a plan view of the receiving rapier head and 7B is a sectional view taken along the line EE of 7A ;

8A is a front view of the loading rapier head and 8B is a front view of the receiving rapier head;

9A is a side view showing the rapier band in a warp opening and 9B Figure 11 is another side view showing the rapier band in the warp opening;

10A and 10B FIG. 12 are diagrams showing a weft insertion apparatus for a rapier loom according to a second embodiment of the present invention, wherein FIG 10A is a side sectional view of a loading rapier head and 10B a sectional view taken along the line FF of 10A is;

11A is a side sectional view of a receiving rapier head and 11B is a sectional view taken along the line GG of 11A ;

12A and 12B FIG. 11 are diagrams showing a weft insertion apparatus for a rapier loom according to a third embodiment of the present invention, wherein FIG 12A is a longitudinal sectional view of the loading rapier head and 12B is a longitudinal sectional view of a receiving rapier head;

13A and 13B 10 are diagrams showing a weft insertion apparatus for a rapier loom according to a fourth embodiment of the present invention, wherein FIG 13A is a longitudinal sectional view of a feed gripper head and 13B is a longitudinal sectional view of a receiving rapier head;

14A and 14B FIG. 11 are diagrams showing a weft insertion apparatus for a rapier loom according to a fifth embodiment of the present invention, wherein FIG 14A is a longitudinal sectional view of a feed gripper head and 14B is a longitudinal sectional view of a receiving rapier head; and

15A and 15B FIG. 15 are diagrams showing a weft insertion apparatus for a rapier loom according to a sixth embodiment of the present invention, wherein FIG 15A is a sectional view of a first gripper guide and 15B is a sectional view of the other first gripper guide.

DESCRIPTION THE PREFERRED EMBODIMENTS

Embodiment 1

A weft insertion apparatus for a rapier weaving machine in accordance with the first embodiment of the present invention will now be described with reference to FIG 1 to 9 described.

In 1A denotes reference numeral 11 a feeder rapier head which enters from the weft insertion start side into the opening of a warp T (in 4 shown) and reference numerals 12 denotes a receiving rapier head to be entered from the weft insertion end side into the opening of the warp T. The feed gripper head 11 is at the front end of a rapier band 13A secured and the receiving rapier head 12 is at the front end of a rapier band 13B secured. The rapier band 13A is a gripper wheel 14 wrapped and the rapier band 13B is a gripper wheel 15 wound. The rapier bands 13A and 13B are formed by performing epoxy resin molding on a laminate of carbon fibers in a thread-like or woven form.

In a row of rapier bands 13A and 13B are a large number of force-receiving holes 133 formed and in a row at the edge surfaces of the gripper wheels 14 and 15 are power transmission teeth 141 and 151 arranged. The force receiving holes 133 the rapier bands 13A and 13B are with the power transmission teeth 141 and 151 the gripper wheels 14 and 15 engaged and the rotation of the gripper wheels 14 and 15 is due to the engagement of the power transmission teeth 141 and 151 with the force receiving holes 133 on the rapier tapes 13A and 13B transfer.

The gripper wheels 14 and 15 are rotated back and forth synchronously with the rotation of the weaving machine. The feed gripper head 11 and the receiving rapier head 12 are made by the back and forth rotation of the gripper wheels 14 and 15 introduced into the warp opening and meet with respect to the binding width at the central portion, as indicated by the dashed lines in 8A and 8B is shown. The through the loading rapier head 11 Shot Y introduced into the warp opening becomes the receiving rapier head 12 cleverly. The feed gripper head 11 and the receiving rapier head 12 be by reverse rotation of the gripper wheels 14 and 15 withdrawn from the warp opening and the weft Y is passed through the warp opening.

The rapier band 13A is by a first gripper guide 16A guided, which is provided outside the warp opening at the weft insertion start page. The rapier band 13B is provided by a first gripper guide provided outside the warp opening at the weft insertion end side 16B guided. As in 3B is shown is the first gripper guide 16A by adding a restriction element 162a on a support element 161 educated. Between the support element 161 and the restriction element 162 are leading columns 163 educated. The broad ends of the rapier band 13A pass the leading columns 163 , At the top of the leading columns 163 defining support element 161 lead guide surfaces 164 the lower surface 132 at the broad ends of the rapier band 13A , guide surfaces 165 covering the lower surfaces of the restriction element 162 form the leading columns 163 defined, lead the upper surface 131 at the broad ends of the rapier band 13A ,

As in 6B is shown is the first gripper guide 16B of the same construction as the first gripper guide 16A and the broad end portions of the rapier band 13B pass the leading columns 163 , The guide surfaces 164 the first gripper guide 16B lead the bottom surface 132 of the rapier band 13B at its broad end. The guide surfaces 165 the first gripper guide 16B lead the upper surface 131 of the rapier band 13B at its broad ends.

As in 9A and 9B is shown, the registered in the warp opening Beschickungsgreiferkopf 11 and the receiving rapier head 12 via second gripper guides 19 which in a row at a a reed 17 supporting batten 18 are arranged. The maximum width of the second gripper guides 19 in the direction of vibration of the reed 17 that is, the leading edges 191 at the top of the second gripper guides 19 , is smaller than the width of the rapier bands 13A and 13B ,

As in 1B is shown in the front end portions of the rapier band 13A . 13B a reinforcing recessed frame 20 integrally formed. As in 2 shown is the reinforcing recessed frame 20 from the same material as that of the rapier band 13A . 13B formed and is simultaneously formed with it. The reinforcing recessed frame 20 consists of a few vertical walls 201 and 202 extending vertically downwards and from a bottom wall 203 covering the lower ends of the vertical walls 201 and 202 combines. As in 3B and 6B shown has reinforcing recessed frame 20 seen in the longitudinal direction of the rapier band 13A . 13B a U-shaped sectional configuration that is wider than the lower surfaces 132 of the rapier band 13A . 13B protrudes downwards. From the front ends of the rapier band 13A . 13B in the direction of the force receiving holes 133 is most of the bottom surface 204 the bottom wall 203 the reinforcing recessed frame 20 parallel to the upper surface 131 or the lower surface 132 of the rapier band 13A and at a position 205 is the bottom surface 204 gently on the lower surface 132 of the rapier band 13A connected. As in 8A and 8B is the length D of the reinforcing recessed frame 20 equal to or slightly larger than half of the stroke L of the loading rapier head 11 and that of the receiving rapier head 12 ,

As in 2 and 4A is shown, there is the feed gripper head 11 from a guide frame 21 by bending a single one Metal plate is formed, and a gripping mechanism 22 that is attached to the guide frame 21 is secured. As in 4B is shown, there is the gripping mechanism 22 from a stationary gripping element 221 , a deflectable movable gripping element 222 and a plate spring 223 that the movable gripping element 222 in press contact with the stationary gripping element 221 holds.

The guide frame 21 consists of a lower wall 22 one on one side of the lower wall 23 vertically upwards extending vertical wall 24 (that is, at the binding front side W1 of the woven fabric W, as in FIG 9 shown), one on the other side of the lower wall 23 vertically upwardly extending side wall 25 (that is, on the side of the reed 17 over the batten 18 ), one on the side wall 25 connected and the bottom wall 23 opposite upper wall 26 and out of one from the top wall 26 vertical downwards extending vertical wall 27 , The stationary gripping element 221 , the movable gripping element 222 and the plate spring 223 are bundled together from above in this order and by means of a screw on the upper surface of the lower wall 23 attached. As in 4C is shown is the guide frame 21 on the bottom wall 203 the reinforcing recessed frame 20 of the rapier band 13A secured by a screw to form an integral unit. That is, the reinforcing deepened frame 20 of the rapier band 13A and the loading rapier head 11 are formed as an integral unit. A compensation formation plate 211 is on the bottom surface of the bottom wall 23 secured. The lower surface 212 the compensation formation plate 211 is with the bottom surface 204 the bottom wall 203 the reinforcing recessed frame 20 of the rapier band 13A flush. The lower surface 212 the compensation formation plate 211 is with the lower surface of the loading rapier head 11 flush.

At the upper edge of the vertically upwardly extending vertical wall 24 are weft guide edges 241 and 242 which are inclined upward and downward, respectively, as seen from the front end, and a horizontal weft leading edge 243 educated. The upwardly inclined weft guide edge 241 also serves as a warp leading edge. When the loading rapier head 11 begins with the movement, then the shot Y at the in 1A shown supply position to a gripping position between the stationary gripping element 221 and the movable gripping element 222 through the weft guide edges 241 . 242 and 243 and the lower edge 271 the vertically downwardly extending vertical wall 27 guided.

In the upper wall 26 is a position control well 261 educated. The one by the gripping mechanism 22 Y shot caught comes with the position control recess 261 engaged. The gripping distance of the gripping mechanism 22 Shot Y seized becomes through the position control recess 261 controlled.

In the upper and lower end edges of the front end of the sidewall 25 are chain guide edges 251 and 252 formed extending from the front end of each other. When the loading rapier head moves, with the upper and lower warps T performing the opening-closing operation being pushed away from each other, the side wall leads 25 the upper and lower warp T along the Kettführungskanten 251 and 252 , causing them to be pushed apart. The Kettführungseffekt due to the Kettführungskante 252 is due to the Kettführungseffekt due to the front end edge 231 the lower wall 23 and the top surface of the flush educational plate 211 accepted. The warp guiding effect due to the lower surface of the leveling formation plate 211 is due to the warp-knit effect of the lower surface 204 the bottom wall 203 the reinforcing recessed frame 20 of the rapier band 13A accepted.

As in 5 and 7A is shown, there is the receiving rapier head 12 from a guide frame 28 formed by bending a single metal plate, and a gripping mechanism 29 on the guide frame 28 is mounted. The gripping mechanism 29 consists of a stationary gripping element 91 at the front end of the guide frame 28 is integrally formed, from a movable gripping element 292 , which is supported so that it is in the longitudinal direction of the receiving rapier head 12 is movable, a compression spring 293 that the movable gripping element 292 with the stationary gripping element 291 keeps in press contact, and from a lever 294 , with the movable gripping element 292 is coupled. The stationary gripping element 291 of the receiving rapier head 12 finds its way between the side wall 25 and extending from the loading rapier head 11 vertical downwards extending vertical wall 27 , The through the loading rapier head 11 gripped shot Y is sent and between the stationary gripping element 291 and the movable gripping element 292 resorted. The lever 294 abuts a stationary cam (not shown) on the weft insertion end side and rotates about a support pin 295 , As a result of this rotation, the movable gripping element becomes 292 from the stationary gripping element 291 separated and the weft Y is from the handle of the stationary gripping element 291 and the movable gripping member 292 Approved.

The guide frame 28 consists of a lower wall 30 and off on both sides of the bottom ren wall 30 provided side walls 31 and 32 , As in 7B is shown is the guide frame 28 on the bottom wall 203 the reinforcing recessed frame 20 of the rapier band 13B secured by a screw to form an integral unit. That is, the reinforcing deepened frame 20 of the rapier band 13B and the receiving rapier head 12 are formed as an integral unit. As in 6A is shown is on the lower surface of the lower wall 30 a leveling plate 281 secured. The lower surface 282 the compensation formation plate 281 is with the bottom surface of the rapier band 13B flush. The lower surface 282 the compensation formation plate 281 forms the lower surface of the receiving rapier head 12 ,

When the receiving rapier head 12 moving apart, pushing apart the upper and lower warps T performing an opening / closing operation, guide the side walls 31 and 32 the upper and lower warp threads T while being pushed apart. The upper edges 311 and 321 the side walls 31 and 32 of the receiving rapier head 12 lead the upper warp T. The warp-knit effect in consequence of the upper edges 311 and 321 the side walls 31 and 32 gets through the top surface 131 of the rapier band 13B accepted. The warp control effect due to the inclined surface 301 the lower wall 30 is due to the Kettführungseffekt due to the lower surface of the compensation education plate 281 accepted. The warp guiding effect due to the lower surface of the leveling formation plate 281 is due to the warp-knit effect of the lower surface 204 the bottom wall 203 the reinforcing recessed frame 20 of the rapier head 13B accepted.

As in 3B is shown is the height position of the guide columns 163 , which are the leading positions for the first gripper guide 16B form higher than the height position of the leading edges 191 the second gripper guides 19 set. That is, the height position of the guide columns 163 is set to be higher than the guide position B (in 3A indicated by a dashed line) passing through the row of leading edges 191 the trained second gripper guides 19 is. Thus, the loading rapier head moves 11 linear over the leading position G. As in 3B is shown, the difference α1 between the height position of the center of gravity 111 from a combination of the loading rapier head 11 and the reinforcing recessed frame 20 and the height position of the lower surface 204 the bottom wall 203 the reinforcing recessed frame 20 of the rapier head 13A substantially equal to the difference ΔL between the height position of the guide surfaces 164 the first gripper guide 16A and the height position of the guide position G of the second gripper guides 19 ,

As in 3A and 3B is shown in consequence of the fact that the lower surface 204 the bottom wall 203 the reinforcing recessed frame 20 of the rapier band 13A with the lower surface of the compensation formation plate 211 is flush, the sliding contact of the loading rapier head 11 with the second gripper guide 19 gently made when the feed gripper head 11 on the second gripper guides 19 slides.

In 3A F1 denotes the position at which the gripper wheel 14 on the rapier band 13A is applied in a linear state transmitted driving force. The driving force application position F1 affects the charging rapier head 11 through the rapier band 13A , and the rapier band 13A and the loading rapier head 11 move integrally. The height position of the driving force application position F1 in the rapier band 13A in the linear state is set to the height position of the moving distance K1, in which the center of gravity 111 from the combination of the loading rapier head 11 and the reinforcing recessed frame 20 moves when the loading rapier head 11 emotional. That is, the height position of the moving distance K1 of the center of gravity 111 from the combination of the loading rapier head 11 and the reinforcing recessed frame 20 is within a range of the thickness of the rapier band 13A set in the linear state lying.

As in 6B is shown, the height position of the guide positions in the first gripper guide 16B forming leading columns 163 above the height position of the leading edges 191 the second gripper guides 19 set. That is, the height position of the guide columns 163 is at above the height position of the guide position G (indicated by the broken line in FIG 6A indicated) by the row of leading edges 191 trained second gripper guides 19 set. Thus, the receiving rapier head moves 12 linear over the leading position G. As in 6B is shown, the difference β1 between the height position of the center of gravity 111 from a combination of the receiving rapier head 12 and the reinforcing recessed frame 20 and the height positions of the lower surface 204 the bottom wall 203 the reinforcing recessed frame 20 of the rapier band 13B essentially the same as the difference Δ2 between the height position of the guide surfaces 164 of the first rapier band 16B and the guide position G of the second gripper guides 19 ,

When the receiving rapier head 12 on the second gripper guides 19 slides, then smooths the flush of the lower surface 204 the bottom wall 203 the reinforcing recessed frame 20 of the rapier band 13B with the bottom surface of the flush educational plate 281 the sliding contact of the receiving rapier head 12 with the second gripper guides 19 ,

In 6A reference character F2 denotes the position at which the gripper wheel 15 on the rapier band 13B is applied in a linear state transmitted driving force. The driving force applying position F2 affects the receiving rapier head 12 through the rapier band 13B , and the rapier band 13B and the receiving rapier head 12 move integrally. The height position of the driving force applying position F2 of the rapier band 13B in the linear state is set to the height position of the movement distance K2, through which the center of gravity 121 the combination of the receiving rapier head 12 and the reinforcing recessed frame 20 moves when the receiving rapier head 12 emotional. That is, the height position of the moving distance K2 of the center of gravity 121 the combination of the receiving rapier head 12 and the reinforcing recessed frame 20 is within the range of the thickness of the rapier band 13B set in the linear state lying.

• (1-1) Die Antriebskraftaufbringposition F1, F2 in dem Greiferband 13A, 13B ist auf die Höhenposition in der Vertikalrichtung des Schwerpunkts 111, 121 der Kombination aus dem Greiferkopf 11, 12 und dem verstärkenden vertieften Rahmen 20 eingestellt. Somit wird die auf das Greiferband 13A, 13B aufgebrachte Antriebskraft linear auf den Schwerpunkt 111, 121 der Kombination aus dem Greiferkopf 11, 12 und dem verstärkenden vertieften Rahmen 20 linear entlang der linearen Konfiguration des Greiferbands 13A, 13B in dem linearen Zustand übertragen. Somit wird beim Beschleunigen oder Verlangsamen des Greiferkopfs 11, 12 die Erzeugung eines Drehmoments um den Schwerpunkt 111, 121 beschränkt. Das Beschränken der Erzeugung des Drehmoments um den Schwerpunkt 111, 121 hilft beim Beschränken der Vertikalbewegung des Greiferkopfs 11, 12. ferner behält die Konfiguration des verstärkenden vertieften Rahmens 20 die lineare Konfiguration des vorderen Endabschnitts des Greiferbands 13A, 13B bei, so dass eine Ablenkung des vorderen Endabschnitts des Greiferbands 13A, 13B verhindert wird. Das Beschränken der Vertikalbewegung des Greiferkopfs 11, 12 und die Verhinderung der Ablenkung des Greiferbands 13A, 13B bieten eine Stabilität in der Bewegung des Greiferkopfs 11, 12. Als ein Ergebnis wird dann, wenn das Greiferband 13A, 13B dazu gebracht wird, sich über die zweiten Greiferführungen 19 in die Kettöffnung zu bewegen, das heißt, wenn es dazu gebracht wird, sich in die Kettöffnung zu bewegen, die Bewegung des Greiferkopfs 11, 12 selbst in dem Fall stabil, in dem lediglich die untere Fläche 204 des verstärkenden vertieften Rahmens 20 oder die untere Fläche 212, 282 des Greiferkopfs 11, 12 geführt ist.
• (1-2) Der Einsatz der zweiten Greiferführungen 19, die lediglich die untere Fläche 204 des verstärkenden vertieften Rahmens 20 oder die untere Fläche 282 des Greiferkopfs 11, 12 führen, bietet die nachstehenden Vorteile:
• (a) Da es für die zweiten Greiferführungen 19 nötig ist, lediglich die untere Fläche 204 des verstärkenden vertieften Rahmens 20 oder die untere Fläche 282 des Greiferkopfs 11, 12 zu führen, muss die Breite der Führungskanten 191 der zweiten Greiferführungen 19 nicht größer als die Breite des Greiferbands 13A, 13B sein. Somit kann verglichen mit dem Fall, in dem die in der Japanischen Gebrauchsmusteroffenlegungsschrift Nr. 5-27070 offenbarte Greiferführung eingesetzt wird, die Bewegungsstrecke des Greiferbands 13A, 13B in die Kettöffnung näher an die Bindungsfront W1 des gewebten Stoffs W gebracht werden. Je näher die Bewegungsstrecke des Greiferbands 13A, 13B in der Kettöffnung an der Bindungsfront W1 des gewebten Stoffs W1 liegt, desto näher kann die am meisten zurückgezogene Position des Riets 17 an die Bindungsfront W1 gebracht werden. Somit wird der Schwingungsbereich des Riets 17 abgeschwächt. Um die Erhöhung der Webgeschwindigkeit zu erreichen und um zu verhindern, dass das Kett bricht oder beschädigt wird, in dem es gegen die Rietklinge gerieben wird, ist es um so besser, je geringer der Schwingungsbereich des Riets 17 ist.
• (b) An beiden Enden der Bindungsfront B1 des gewobenen Stoffs W sind Breithalter vorgesehen, um ein Kräuseln zu verhindern. Bei den in der Japanischen Gebrauchsmusteranmeldungsoffenlegung Nr. 5-27070 offenbarten Greiferführungen schwingen die Greiferführungen an beiden Enden der Bindungsfront, so dass sie sich in die Nähe des Breithalter bewegen. Je größer der Betrag ist, um den die vorderen Endabschnitte der Greiferführungen über die obere Fläche des Greiferbands vorstehen, um so höher muss die Höhenposition der Breithalter sein. In dem Fall, in dem ein Kräuseln durch Pressen der Breithalter gegen die obere Fläche des gewobenen Stoffs W verhindert wird, ist die Höhenposition der Breithalter um so höher, je kleiner der Gewebeeinschlagwinkel mit Bezug auf die Breithalter ist. Je kleiner der Gewebeeinschlagwinkel mit Bezug auf die Breithalter ist, desto geringer ist der Kräuselverhinderungseffekt. Der Einsatz der zweiten Greiferführungen 19 ist beim Absenken der Höhenposition der Breithalter vorteilhaft. Außerdem verbessert die Konstruktion, bei der der Greiferkopf 11, 12 und der verstärkende Vertiefungsrahmen 20 durch die zweiten Greiferführungen 19 geführt werden, den Kräuselverhinderungseffekt.
• (1-3) Der verstärkende vertiefte Rahmen 20, der ein Verstärkungsabschnitt zum Beibehalten der linearen Konfiguration des vorderen Endabschnitts des Greiferbands 13A, 13B ist, ist im Wesentlichen an vier Stellen in der Breitenrichtung des Greiferbands 13A, 13B bei im Wesentlichen rechten Winkeln gebogen, so dass er in einer U-Gestalt ausgebildet ist. Eine solche gebogene Gestalt ist beim Verhindern der Ablenkung überlegen und ist einfacher auszubilden. Der verstärkende vertiefte Rahmen 20 von dieser gebogenen Gestalt stellt einen einfachen Verstärkungsabschnitt bereit und ist eine sanfte Konfiguration, die kein Fangen des Kettfadens mit sich bringt.
• (1-4) Bei der ersten Hälfte des Eintragsprozesses des Beschickungsgreiferkopfs 11 und des aufnehmenden Greiferkopfs 12 in die Kettöffnung wird der Greiferkopf 11 beschleunigt. In der späteren Hälfte des Rückziehprozesses des Beschickungsgreiferkopfs 11 und des aufnehmenden Greiferkopfs 12 aus der Kettöffnung heraus werden die Greiferköpfe 11 und 12 verlangsamt. 8A veranschaulicht die erste Hälfte des Eintragsprozesses des Beschickungsgreiferkopfs 11 in die Kettöffnung oder die spätere Hälfte des Rückziehprozesses des Beschickungsgreiferkopfs 11 aus der Kettöffnung. 8B veranschaulicht die erste Hälfte des Eintragsprozesses des aufnehmenden Greiferkopfs 12 in die Kettöffnung oder die spätere Hälfte des Rückziehprozesses des aufnehmenden Greiferkopfs 12 aus der Kettöffnung heraus. Wenn der Greiferkopf 11, 12 während dem Eintragsprozess in die Kettöffnung beschleunigt wird und wenn der Greiferkopf 11, 12 während des Rückziehprozess von der Kettöffnung verlangsamt wird, ist es wahrscheinlich, dass ein Anheben des Greiferkopfs 11, 12, ein Beulen des Greiferbands usw. auftreten. Die Länge D des vertieften Rahmens 20 ist etwas größer als die Hälfte des Hubs L der Greiferköpfe 11, 12. Das Einstellen der Länge des verstärkenden vertieften Rahmens 20 wird aus dem Grund gemacht, dass während der ersten Hälfte des Eintragprozesses des Greiferkopfs 11, 12 in die Kettöffnung und während der späteren Hälfte des Rückziehprozesses des Greiferkopfs 11, 12 aus der Kettöffnung heraus die Endabschnitte des verstärkenden vertieften Rahmens 20 des Greiferbands 13A, 13B einer Führungsaktion der Führungsfläche 165 der ersten Greiferführung 16A, 16B unterzogen werden. Die Führungsaktion der Führungsfläche 165 der ersten Greiferführung 16A, 16B, die an dem verstärkenden vertieften Rahmen 20 des Greiferbands 13A, 13B ausgeübt wird, hilft dabei, ein Anheben des verstärkenden vertieften Rahmens 20 zu verhindern. Somit ist es möglich, ein Anheben des Beschickungsgreiferkopfs 11 und des aufnehmenden Greiferkopfs 12, die integral an dem verstärkenden vertieften Rahmen 20 gesichert sind, zu verhindern. Der verstärkende vertiefte Rahmen 20, der das Anheben des Greiferkopfs 11, 12 verhindert, trägt stark zu der Stabilisierung der Bewegung des Greiferkopfs 11, 12 bei.
• (1-5) Der verstärkende vertiefte Rahmen 20, der mit dem Greiferband 13A, 13B integriert ist, kann durch Matrizenformgebung einfach ausgebildet werden. Der Montageprozess eines als eine separate Komponente ausgebildeten Verstärkungsabschnitt an dem Greiferband ist eine mühsame Aufgabe, die Vorgänge, etwa Schrauben, Stiftverbindung und Kleben mit einbezieht. Bei der Konstruktion, bei der der verstärkende vertiefte Rahmen 20 mit dem Greiferband 13A, 13B integriert ist, besteht kein Bedarf zum Ausführen solcher mühsamen Montageprozesse.
• (1-6) In dem Fall, in dem an das Greiferband ein separater Verstärkungsabschnitt angefügt wird, ist es für das separate Verstärkungselement selbst notwendig, dass es eine Steifigkeit aufweist, so dass es nicht abgelenkt werden kann. Zusätzlich muss der Verbindungsbereich des Verbindungsabschnitts zwischen dem Greiferband und dem Verstärkungsabschnitt ein geeigneter sein. Beispielsweise wäre eine Konstruktion einfach, bei der ein Verstärkungsabschnitt einer vertieften Schnittkonfiguration an ein ebenes Greiferband gefügt wird. In diesem Fall würde jedoch die aus dem Greiferband und dem Verstärkungsabschnitt bestehende Verbindungsstruktur schwerer als das den verstärkenden vertieften Rahmen 20 von diesem Ausführungsbeispiel aufweisende Greiferband sein. Das heißt, die Konstruktion, bei der das Greiferband und der Verstärkungsabschnitt integriert sind, trägt zu einer Reduktion des Gewichts der aus dem Greiferband und dem Verstärkungsabschnitt bestehenden Verbindungsstruktur bei. Diese Gewichtsreduktion ist beim Erzielen einer erhöhten Webgeschwindigkeit vorteilhaft.

The first embodiment offers the following effects.

• (1-1) The driving force applying position F1, F2 in the rapier band 13A . 13B is at the height position in the vertical direction of the center of gravity 111 . 121 the combination of the rapier head 11 . 12 and the reinforcing recessed frame 20 set. Thus, the on the rapier band 13A . 13B applied driving force linearly on the center of gravity 111 . 121 the combination of the rapier head 11 . 12 and the reinforcing recessed frame 20 linear along the linear configuration of the rapier band 13A . 13B transmitted in the linear state. Thus, when accelerating or slowing down the rapier head 11 . 12 the generation of a torque around the center of gravity 111 . 121 limited. Restricting the generation of torque around the center of gravity 111 . 121 Helps to limit the vertical movement of the rapier head 11 . 12 , Further, the configuration of the reinforcing recessed frame remains 20 the linear configuration of the front end portion of the rapier band 13A . 13B at, so that a deflection of the front end portion of the rapier band 13A . 13B is prevented. Restricting the vertical movement of the rapier head 11 . 12 and the prevention of the deflection of the rapier band 13A . 13B provide stability in the movement of the rapier head 11 . 12 , As a result, when the rapier band 13A . 13B is brought about the second gripper guides 19 to move into the warp opening, that is, when it is caused to move into the warp opening, the movement of the rapier head 11 . 12 stable even in the case where only the lower surface 204 the reinforcing recessed frame 20 or the bottom surface 212 . 282 of the rapier head 11 . 12 is guided.
• (1-2) The use of the second gripper guides 19 that only the lower surface 204 the reinforcing recessed frame 20 or the bottom surface 282 of the rapier head 11 . 12 lead, offers the following advantages:
• (a) Since it is for the second gripper guides 19 is necessary, only the lower surface 204 the reinforcing recessed frame 20 or the bottom surface 282 of the rapier head 11 . 12 To guide, the width of the leading edge must be 191 the second gripper guides 19 not larger than the width of the rapier band 13A . 13B be. Thus, as compared with the case where the gripper guide disclosed in Japanese Utility Model Laid-Open Publication No. 5-27070 is used, the moving distance of the rapier band can be set 13A . 13B be brought closer to the binding front W1 of the woven fabric W in the warp. The closer the moving distance of the rapier band 13A . 13B in the warp opening at the binding front W1 of the woven fabric W1, the closer the most retracted position of the reed 17 be brought to the binding front W1. Thus, the vibration range of the reed becomes 17 weakened. In order to increase the weaving speed and prevent the warp from being broken or damaged by being rubbed against the reed blade, the smaller the vibration range of the reed, the better 17 is.
• (b) At both ends of the binding front B1 of the woven fabric W, spreaders are provided to prevent curling. In the gripper guides disclosed in Japanese Utility Model Application Laid-Open No. 5-27070, the gripper guides vibrate at both ends of the binding front to move near the spreader. The greater the amount by which the front end portions of the gripper guides project beyond the upper surface of the rapier band, the higher must be the height position of the spreader. In the case where curling is prevented by pressing the spreader against the top surface of the woven fabric W, the smaller the fabric turning angle with respect to the spreader, the higher the height position of the spreader. The smaller the fabric impact angle with respect to the spreader, the lower the curl prevention effect. The use of the second gripper guides 19 is advantageous when lowering the height position of the spreader. In addition, the construction improves the gripper head 11 . 12 and the reinforcing pit frame 20 through the second gripper guides 19 be guided, the curl prevention effect.
• (1-3) The reinforcing deepened frame 20 the reinforcing portion for maintaining the linear configuration of the front end portion of the rapier band 13A . 13B is substantially at four places in the width direction of the rapier band 13A . 13B bent at substantially right angles so that it is formed in a U-shape. Such a bent shape is superior in preventing the deflection and is easier to form. The reinforcing recessed frame 20 of this bent shape provides a simple reinforcing section and is a smooth configuration that does not entail catching the warp.
• (1-4) In the first half of the feed gripper head picking process 11 and the receiving rapier head 12 in the warp opening is the gripper head 11 accelerated. In the later half of the retraction process of the loading rapier head 11 and the receiving rapier head 12 The gripper heads become out of the warp opening 11 and 12 slowed down. 8A Figure 1 illustrates the first half of the picker head entry process 11 in the warp opening or the later half of the retraction process of the feed gripper head 11 from the warp opening. 8B illustrates the first half of the picking process of the receiving rapier head 12 in the warp opening or the later half of the retraction process of the receiving rapier head 12 out of the warp opening. When the rapier head 11 . 12 during the picking process is accelerated into the warp opening and when the rapier head 11 . 12 during the retraction process is slowed down by the warp opening, it is likely that a lifting of the rapier head 11 . 12 , a buckling of the rapier band, etc. occur. The length D of the recessed frame 20 is slightly larger than half of the stroke L of the gripper heads 11 . 12 , Adjusting the length of the reinforcing recessed frame 20 is made for the reason that during the first half of the picking process of the rapier head 11 . 12 into the warp opening and during the later half of the pull-back process of the rapier head 11 . 12 from the warp opening, the end portions of the reinforcing recessed frame 20 of the rapier band 13A . 13B a leadership action of the leadership area 165 the first gripper guide 16A . 16B be subjected. The leadership action of the guidance surface 165 the first gripper guide 16A . 16B who are at the reinforcing recessed frame 20 of the rapier band 13A . 13B Exercising helps raise the reinforcing recessed frame 20 to prevent. Thus, it is possible to lift the loading rapier head 11 and the receiving rapier head 12 integral with the reinforcing recessed frame 20 are secured to prevent. The reinforcing recessed frame 20 that lifting the rapier's head 11 . 12 prevents, contributes greatly to the stabilization of the movement of the rapier head 11 . 12 at.
• (1-5) The reinforcing deepened frame 20 that with the rapier band 13A . 13B is integrated, can be easily formed by Matrizeneformgebung. The assembly process of a reinforcing portion formed as a separate component on the rapier band is a tedious task involving operations such as screwing, pin connection, and gluing. In the construction in which the reinforcing recessed frame 20 with the rapier band 13A . 13B is integrated, there is no need to carry out such arduous assembly processes.
• (1-6) In the case where a separate reinforcing portion is attached to the rapier band, it is necessary for the separate reinforcing member itself to have rigidity so that it can not be deflected. In addition, the connecting portion of the connecting portion between the rapier band and the reinforcing portion must be more suitable. For example, a construction in which a reinforcing portion of a recessed cut configuration is joined to a flat rapier band would be simple. In this case, however, the connection structure consisting of the rapier band and the reinforcing portion would become heavier than that of the reinforcing recessed frame 20 be of this embodiment having gripper band. That is, the structure in which the rapier band and the reinforcing portion are integrated contributes to a reduction in the weight of the connecting structure consisting of the rapier band and the reinforcing portion. This weight reduction is advantageous in achieving increased weaving speed.

Embodiment 2

Next, referring to 10 and 11 a weft insertion device for a rapier according to a second embodiment of the present invention is described. The components that are the same as those of the first embodiment are denoted by the same reference numerals.

As in 10A shown is the back half 232 the lower wall 23 of the loading rapier head 11C lower than the front half 233 the lower wall 23 , The back half 232 the lower wall 23 is on the bottom wall 203 the reinforcing recessed frame 20 of the rapier band 13A secured. As in 10B shown is the difference α2 between the height position of the center of gravity 111 of the loading rapier head 11C and the height position of the lower surface 204 the bottom wall 203 the reinforcing recessed frame 20 of the rapier band 13A greater than the difference α1 of the first embodiment. When the loading rapier head 11C on the second gripper guides 19 only the lower surface can move 204 the bottom wall 203 the reinforcing recessed frame 20 of the rapier band 13A with the leading edges 191 the second gripper guides 19 be brought into sliding contact.

As in 11A shown is the back half 302 the lower wall 30 of the receiving rapier head 12C lower than the front half 303 the lower wall 30 , The back half 302 the lower wall 30 is on the bottom wall 203 the reinforcing recessed frame 20 the rapier band C secured. As in 11B is shown, the difference β2 between the height position of the center of gravity 121 of the receiving rapier head 12C and the height position of the lower surface 204 the bottom wall 203 the reinforcing recessed frame 20 of the rapier band 13B larger than the difference β1 in the first embodiment. When the receiving rapier head 12C on the second gripper guides 19 only the lower surface can move 204 the bottom wall 203 the reinforcing recessed frame 20 of the rapier band 13B with the leading edges 191 the second gripper guides 19 be brought into sliding contact.

The second embodiment offers the same effect as the first embodiment. Because the height position of the lower surface 204 the bottom wall 203 the reinforcing recessed frame 20 lower than in the first embodiment, the height position of the leading edges 191 the second gripper guides 19 also deeper. Thus, the interruption amount (the protruding amount from the lower to the higher warp) of the leading edges 191 then when the second gripper guides 19 of the second embodiment, enter the warp opening, less than in the first embodiment. The smaller the interruption amount of the leading edges 191 is, the lower the possibility of occurrence of a warp break and a horizontal line.

Embodiment 3

In a third embodiment, one at the front end of the rapier band 13A . 13B integrally formed reinforcing section 33 have a cut configuration as they are in 12A and 12B is shown. The connection of the rapier head 11 . 12 with the reinforcing section 33 can be easily accomplished by configuring the bottom wall 23 . 30 of the rapier head 11 . 12 to the configuration of the upper surface of the reinforcing section 32 is made suitable.

Also in the third embodiment, the second gripper guides lead 19 the lower surface of the rapier head 11 . 12 and the lower surface of the reinforcing portion 33 is not due to the second gripper guides 19 in sliding contact with it.

Embodiment 4

In a fourth embodiment, one may be integral with the front end of the rapier band 13A . 13B formed reinforcing section 34 have a cut configuration as shown in FIG 13A and 13B is shown. The connection of the rapier head 11 . 12 with the reinforcing section 34 can be easily accomplished by configuring the bottom wall 23 . 30 of the rapier head 11 . 12 to the configuration of the upper surface of the reinforcing section 34 is made suitable.

Also in the fourth embodiment, the second gripper guides lead 19 the lower surfaces of the rapier head 11 . 12 and the lower surface of the reinforcing portion 34 is not through the second gripper guides 19 in sliding contact with it.

Embodiment 5

In a fifth embodiment, one may be integral with the front end of the rapier band 13A . 13B formed reinforcing section 35 have a cut configuration as they are in 14A and 14B is shown. The reinforcement section 35 is formed as a protruding frame having a sectional configuration of an inverted U-shape so as to project over the upper surface of the rapier band 13A . 13B protrudes upward. The connection of the rapier head 11 . 12 at the reinforcing section 35 can be easily effected by the configurations of the bottom wall 23 . 30 of the rapier head 11 . 12 is made to fit the configuration of the lower surface of the reinforcing section. Also in the fifth embodiment, the second gripper guides lead 19 the lower surface of the rapier head 11 . 12 and the lower surface of the reinforcing portion 35 is not due to the second gripper guides 19 in sliding contact with it.

Embodiment 6

Next, referring to 15A and 15B a weft insertion device for a rapier according to a sixth Embodiment of the present invention described. The components that are the same as those of the first embodiment are denoted by the same reference numerals.

As in 15A is shown is the first gripper guide 16C formed by a restriction element 162C from above on a support element 161C is added. Between the support element 161C and the restriction element 162C are leading columns 163C educated. The guide surfaces 165C covering the lower surfaces of the restriction element 162C form the leading columns 163C forms the broad end portions of the upper surface 131 of the rapier band 13A , The guide surface 164C covering the upper surface of the support element 161C forms that the leading columns 163c trains, leads the bottom surface 204 the bottom wall 203 the reinforcing recessed frame 20 of the rapier band 13A or the bottom surface of the bottom wall 23 of the rapier head.

As in 15B is shown has a first gripper guide 16D the same construction as the first gripper guide 16C , guide surfaces 165C lead the broad end portions of the upper surface 131 of the rapier band 13B , A guide surface 164C leads the bottom surface 204 the bottom wall 203 the reinforcing recessed frame 20 of the rapier band 13B or the bottom surface of the bottom wall 23 of the rapier head.

The first gripper guides 16C and 16D outside the warp opening, the upper surface of the upper and lower surfaces of the rapier band lead 13A . 13B and the bottom surface 204 the reinforcing recessed frame 20 or the bottom surface of the bottom wall 23 of the rapier head. Regarding the stability of movement of the loading rapier head 11 and the receiving rapier head 12 this embodiment offers the same effect as the first embodiment.

There is disclosed a weft insertion apparatus with which it is possible to achieve an improvement in the moving stability of the rapier head even in a construction employing a guide which guides the rapier head or the rapier band in the warp opening only from below. The height position of the guiding position ( 163 ) in a first gripper guide ( 16A ) outside the warp opening is at above the height position of the leading edges ( 191 ) of the second gripper guides ( 19 ) within the warp opening. A loading rapier head ( 11 ) moves linearly at the leading edge ( 191 ). The first gripper guide ( 16A ) guides the broad end portions of the rapier band ( 13A ) and the second gripper guides ( 19 ) lead the lower surface ( 204 ) of a reinforcing, more in-depth framework ( 20 ), which in the front end portion of the rapier ( 13A ) is trained.

Claims (12)

Weft insertion device for a rapier loom with a first gripper guide ( 16A . 16B ) outside a warp opening and a second gripper guide ( 19 ) within the warp opening in which a gripper belt ( 13A . 13B ), on which a rapier head ( 11 . 12 ) is mounted for gripping a shot, is guided by the first gripper guide, and in which the gripper belt is caused to move linearly on the second gripper guide to cause an entry of a shot (Y), wherein the height position of a leading position ( 163 ) in the first gripper guide ( 16A . 16B ) from the height position of a guide position (G) of the second gripper guide ( 19 ), wherein at least the upper surface ( 131 ) of the rapier band ( 13A . 13B ) by the first gripper guide ( 16A . 16B ), the lower surface ( 204 ) of the reinforcement section ( 20 ) or the lower surface ( 212 . 282 ) of the rapier head ( 11 . 12 ) by the second gripper guide ( 19 ) is guided, wherein in a front end portion of the rapier band ( 13A . 13B ) attached to the gripper head ( 11 . 12 ), a gain section ( 20 ) is provided to maintain a linear configuration of the front end portion, at least one of the lower surface ( 204 ) of the reinforcement section ( 20 ) and the lower surface ( 212 . 282 ) of the rapier head ( 11 . 12 ) in a linear state below the lower surface ( 132 ) of the rapier band, characterized in that the reinforcing portion ( 20 ) a recessed frame ( 20 . 33 . 34 ), which has a U-shaped cross-sectional configuration as seen in the longitudinal direction of the rapier band (FIG. 13A . 13B ) so that it slopes down below the lower surface ( 132 ) of the rapier band ( 13A . 13B protruding, or wherein the reinforcing section ( 20 ) an above framework ( 35 ) seen in the longitudinal direction of the rapier band ( 13A . 13B ) has a cross-sectional configuration in the form of an inverted U, so that it is separated from the lower surface (FIG. 132 ) of the rapier band ( 13A . 13B ) protrudes upward, wherein the gripper head ( 11 . 12 ) is received in the recessed frame or in the projecting frame such that a driving force application point (F1, F2) in the rapier band (FIG. 13A . 13B ) is set in the linear state at least to a position which is substantially the height position of the center of gravity of the gripper head ( 11 . 12 ) corresponds. A weft insertion device for a rapier weaving machine according to claim 1, wherein both the upper surface ( 131 ) as well as the lower surface ( 132 ) of the rapier band ( 13A . 13B ) by the first Greiferfüh tion ( 16A . 16B ) are guided. A weft insertion device for a rapier weaving machine according to one of claims 1 or 2, wherein the reinforcing portion ( 20 ) with the rapier band ( 13A . 13B ) is formed in one piece and of the same material as the latter. A weft insertion apparatus for a rapier weaving machine according to one of claims 1 to 3, wherein the length (D) of the reinforcing portion (15) 20 ) at least half of the stroke (L) of the gripper head ( 11 . 12 ) is. A weft insertion device for a rapier weaving machine according to one of claims 1 or 2, wherein the reinforcing portion ( 20 ) from the rapier band ( 13A . 13B ), and wherein the rapier head ( 11 . 12 ) is connected to the front end of the separate reinforcing section or rapier band. Weft insertion device for a rapier weaving machine according to one of claims 1 or 2, wherein the gripper head ( 11 . 12 ) with a guide frame ( 21 . 28 ), wherein a part of the guide frame extends so as to extend the reinforcing section ( 20 ). A weft insertion apparatus for a rapier weaving machine according to any one of claims 1 to 6, wherein the sectional configuration of the reinforcing portion (FIG. 20 ) is biaxially symmetrical. A weft insertion apparatus for a rapier weaving machine according to any one of claims 1 to 6, wherein the sectional configuration of the reinforcing portion (FIG. 20 ) is asymmetrically biaxial. A weft insertion apparatus for a rapier weaving machine according to any one of claims 1 to 8, wherein a driving force application point in the rapier band is set in a linear state to a position close to the height position of the center of gravity (Fig. 111 . 121 ) is located from a combination of the rapier head and the reinforcing section. A weft insertion device for a rapier weaving machine according to one of claims 1 to 8, wherein the height position of the center of gravity of the gripper head ( 11 . 12 ) within the range of the thickness of the rapier band ( 13A . 13B ) is set in a linear state. A weft insertion device for a rapier weaving machine according to one of claims 1 to 8, wherein the height position of a moving distance (K1, K2) of the center of gravity ( 111 . 121 ) a combination of the rapier head ( 11 . 12 ) and the reinforcing section ( 20 ) of the range of the thickness of the rapier band ( 13A . 13B ) deviates slightly up or down in a linear state. A weft insertion device for a rapier weaving machine according to one of claims 1 or 2, wherein a rear half ( 232 . 302 ) a lower wall ( 23 . 30 ) of the rapier head ( 11C . 12C ) lower than a front half ( 133 . 303 ) of the lower wall, and wherein the rear half of the lower wall on the bottom wall ( 203 ) of the reinforcement section ( 20 ) of the rapier band ( 13A . 13B ) is secured.