JPH11189952A - Weft inserting apparatus in rapier loom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prolong to life of a rapier band and provide a lightweight rapier wheel. SOLUTION: A rapier wheel 13 comprises a circular pair of substrates 19 and 20 and plural arc-like divided tooth bodies 21. The divided tooth bodies 21 are equipped with plural power-transmitting teeth 14 and a rapier flange 211. A rapier band 12 is joined to the flange 211. The divided tooth bodies 21 are subjected to caulking attachment to the side of the substrates 19 and 20 by a caulking pin 24 between peripheries of substrates 19 and 20. Adjacent divided tooth bodies 21 are joined through their end faces to constitute a circular tooth body 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weft insertion device for a rapier loom.

[0002]

2. Description of the Related Art As disclosed in Japanese Patent Application Laid-Open No. 8-209494, a rapier band having a rapier head for gripping a weft is wrapped around a reciprocatingly rotated rapier wheel. Power transmission teeth are arranged in a row on the peripheral surface of the rapier wheel, and power receiving holes are arranged in a rigid and flexibly deformable rapier band. The rapier wheel on which the rapier band is wound so as to mesh with the power transmission teeth and the power receiving hole is reciprocated and rotated, and the rapier head fixed to the rapier band enters the warp opening and retreats from the warp opening. Weft insertion is performed.

In order to make the rapier head run at high speed, it is necessary to reciprocally rotate the rapier wheel at high speed. For this purpose, it is necessary to reduce the weight of the rapier wheel. Shokai 61
Japanese Patent Publication No. 111980 discloses a compound gear in which a gear body is made of plastic and teeth of the gear body are covered with a metal sheet material. In European Patent Publication No. 751246A1, a row of teeth is formed around the periphery of a synthetic resin base,
A gear is disclosed in which a wear-resistant band forming a row of external teeth is bonded to the row of teeth. 61-111980
As disclosed in Japanese Unexamined Patent Application Publication No. HEI 5-75246A1, the weight of the rapier wheel is reduced by using lightweight resin for the parts other than the teeth meshing with the power receiving holes of the rapier band.

[0004]

However, the molded resin gear body or base body has molding distortion. Even if the peripheral teeth of the gear body or base body having molding distortion are covered with an abrasion-resistant material, the gear teeth or the base body may be deformed. The pitch or shape of the pattern is out of order. The irregular pitch or shape of the teeth prevents smooth engagement between the power receiving holes of the rapier band and the teeth, and the power receiving holes are worn out early. Premature wear of the power receiving holes shortens the life of the rapier band.

[0005] The present invention extends the life of a rapier band,
Another object of the present invention is to provide a lightweight rapier wheel.

[0006]

According to the first aspect of the present invention, there is provided a circular base, and the power transmission teeth are arranged in a ring around the periphery of the base and supported by the periphery. The rapier wheel is provided with support adjusting means for defining an annular arrangement position of the power transmission teeth, wherein the power transmission teeth are formed of a wear-resistant material made of metal, and a lighter material that is lighter than the wear-resistant material. To form the substrate.

[0007] The power transmission teeth are supported by supporting and adjusting means on the peripheral edge of the processed base. Therefore, the power transmission teeth are not affected by the processing strain of the base. If the power transmission teeth made of metal that does not cause processing distortion are formed with high precision, the pitch or shape of the power transmission teeth supported on the side surface of the peripheral portion of the base body maintains high processing precision during formation.

[0008] In the invention of claim 2, in claim 1,
The power transmission teeth are supported on the side surface of the peripheral portion of the base via the support adjusting means. The power transmission teeth supported on the side surface of the peripheral portion of the base via the support adjusting means are not affected by the processing strain of the base. If the power transmission teeth made of metal that does not cause processing distortion are formed with high precision, the pitch or shape of the power transmission teeth supported on the side surface of the peripheral portion of the base body maintains high processing precision during formation.

According to a third aspect of the present invention, in any one of the first and second aspects, the power transmission teeth are supported between the peripheral edges of the pair of bases opposed to each other. The configuration in which the power transmission teeth are supported by the pair of bases contributes to strengthening the structure of the rapier wheel.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the power transmission teeth are provided on an annular tooth body attached to a side surface of a peripheral portion of the base, and the annular tooth is provided. The connecting portion where the body is fixed to the side surface of the base by the fixing means is the support adjusting means.

The teeth attached to the side of the peripheral edge of the base are not affected by the processing strain of the base. If a metal tooth body that does not generate processing distortion is formed with high precision, the pitch or shape of the power transmission teeth of the tooth body attached to the side surface of the peripheral edge of the base maintains high processing accuracy during formation I do.

According to the invention of claim 6, in claim 5,
A plurality of divided tooth bodies having at least one of the power transmission teeth and attached to a side surface of a peripheral portion of the base are annularly arranged along the periphery of the base to form the annular tooth body.

The configuration in which the annular teeth are divided is advantageous in terms of molding. According to a sixth aspect of the present invention, in any one of the fourth and fifth aspects, a caulking pin is used as the fastening means.

A caulking pin is suitable as a fastening means.
According to a seventh aspect of the present invention, in any one of the fourth to sixth aspects, the tooth body is a molded body.

The metal molded body does not cause a variation in the shape accuracy. According to the invention of claim 8, claims 1 to 3 are provided.
In any one of the above, the power transmission teeth were formed by bending a metal plate.

The plate-shaped power transmission teeth are effective for reducing the moment of inertia about the axis of the rapier wheel. According to a ninth aspect of the present invention, in any one of the first to third aspects and the eighth aspect, a support ring fixed to a side surface of the base is used as the support adjustment means, and a root of the power transmission tooth is provided. Was embedded in the support ring.

In the configuration in which the root of the power transmission tooth is embedded in the support ring, the inside of the power transmission tooth is hollow. The configuration in which the power transmission teeth are hollow inside is effective in reducing the moment of inertia about the axis of the rapier wheel.

According to a tenth aspect, in the eighth aspect, the support ring is made of a thermosetting resin. The coupling of the power transmission teeth into the support ring is easy.

According to an eleventh aspect of the present invention, in any one of the first to tenth aspects, the base is made of a synthetic resin. The configuration in which the base is made of synthetic resin is suitable for reducing the weight of the rapier wheel.

[0020]

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

Reference numeral 11 shown in FIG. 1 denotes a delivery rapier head inserted into the opening of the warp (not shown) from the weft insertion start end. The delivery rapier head 11 is fixed to the tip of a rapier band 12, and the rapier band 12 is wound around a rapier wheel 13. The support shaft 22 supporting the rapier wheel 13 is reciprocally driven in synchronization with the rotation of the loom, and the rapier wheel 13 reciprocates around the support shaft 22. A rapier band (not shown) is also wound around a reciprocatingly rotating rapier wheel (not shown) at the weft insertion end side. A receiving rapier head (not shown) is fixed to the tip of the rapier band. The transfer rapier head 11 and the receiving rapier head are inserted into the warp shed by the forward rotation of both rapier wheels, and the transfer rapier head 11 and the receiving rapier head meet at the center of the weaving width. The weft inserted into the warp shedding by the delivery rapier head 11 is delivered to the receiving rapier head. The return rapier head 11 and the receiving rapier head retreat from the warp shedding by the backward rotation of both rapier wheels, and the weft passes through the warp shedding.

Power transmission teeth 14 are arranged in a row on a peripheral surface of a rapier wheel 13 around which the rapier band 12 is wound.
Power receiving holes 15 are arranged in the rapier band 12. The reciprocating rotation of the rapier wheel 13 is transmitted to the rapier band 12 via the power transmission teeth 14 and the power receiving holes 15. As shown in FIG. 2A, the pair of position regulating rollers 17 and 18 supported by the support plate 16
Is regulated with respect to the peripheral surface of the rapier wheel 13.

The rapier wheel 13 comprises a pair of circular base bodies 19 and 20 and a plurality of arc-shaped divided tooth bodies 21. As shown in FIG. 2B, support flanges 221 and 222 are formed on the peripheral surface of the support shaft 22, and the support flanges 221 and 222 are caulked by caulking pins 23 so that the substrates 19 and 20 are opposed to each other. It is fixed. The bases 19 and 20 are inclined so as to approach each other from the radial center side toward the peripheral side.

The divided tooth body 21 has a plurality of power transmission teeth 14 and a flange 211. The rapier band 12 is joined to the flange 211. The divided tooth body 21 is a base body 19,
The bases 19, 2 are caulked between the peripheral portions of
It is swaged and fastened to the side of 0. As shown in FIG. 2 (b), the chain-shaped caulking pin 24 is caulked and deformed in the caulking holes 192 and 202 of the substrates 19 and 20. The diameter of the caulking holes 192 and 202 is the pin hole 21 of the divided tooth body 21.
2 larger than the diameter. Adjacent divided tooth bodies 21 are joined via an end face to form an annular tooth body 25.

The substrates 19 and 20 are made of a synthetic resin reinforced with a reinforcing material such as carbon fiber, glass fiber, and aramid fiber. Holes 191 and 2 for weight reduction are formed in the bases 19 and 20.
01 is empty. The divided tooth body 21 is a molded body of aluminum or iron.

The divided teeth 21 are fixed to the bases 19 and 20 by caulking in a state where all the divided teeth 21 are assembled to the annular teeth 25 in a mold frame 39 shown by a chain line in FIG. 2B. Done.

In the first embodiment, the following effects can be obtained. (1-1) The bases 19 and 20 made of synthetic resin are molded, and the bases 19 and 20 are subjected to molding distortion. Substrates 19, 20
Causes a variation in processing accuracy due to molding strain,
The teeth 25 are supported on the side surfaces of the peripheral portions of the bases 19 and 20 after processing. That is, the side face of the divided tooth body 21 is
4 forms a connecting portion fixed to the side surface of the peripheral portion of the bases 19 and 20. The diameter difference between the pin hole 212 and the caulking hole 192 absorbs the variation in the processing accuracy. Accordingly, the teeth 25 attached to the side surfaces of the peripheral portions of the bases 19 and 20
Is not affected by the molding strain of the substrates 19 and 20. The arrangement position of the power transmission teeth 14 is defined with high precision by the arrangement in the mold 39, and the arrangement pitch of the power transmission teeth 14 arranged and supported in a ring around the periphery of the bases 19 and 20 is within the form 39. Is maintained as it is at the arrangement pitch. If the divided teeth 21 made of metal that does not cause processing distortion are formed with high precision, the pitch or shape of the power transmission teeth 14 of the teeth 25 attached to the side surfaces of the peripheral portions of the bases 19 and 20 is formed. Maintain high processing accuracy at the time. Therefore, the power receiving hole 15 of the rapier band 12 and the power transmission teeth 14 are smoothly meshed with each other, and the early wear of the power receiving hole 15 is avoided. Avoidance of premature wear of the power receiving hole 15 extends the life of the rapier band 12. (1-2) If the number of divided tooth bodies 21 is increased, individual divided tooth bodies 2
1 can be reduced in size. The configuration in which the annular tooth body 25 is divided is advantageous in terms of the cost of the mold in manufacturing by molding. (1-3) The fastening means including the caulking pin 24, the caulking hole 192, and the pin hole 212 is suitable for absorbing the molding strain of the substrates 19 and 20. (1-4) Although the divided tooth body 21 is a metal molded body, the tooth body 21 of the metal molded body does not cause variation in shape accuracy. Therefore, post-processing such as surface grinding of the power transmission teeth 14 is unnecessary. (1-5) The configuration in which the divided tooth body 21 provided with the power transmission teeth 14 is sandwiched and supported between the peripheral portions of the pair of bases 19 and 20 contributes to strengthening the structure of the rapier wheel 13. (1-6) The configuration in which the pair of bases 19 and 20 are spread toward the center of the radius is effective in increasing the strength of supporting the teeth 25 by the bases 19 and 20. (1-7) The synthetic resin forming the bases 19 and 20 is most suitable as a lighter and lighter material than the metal wear-resistant material forming the power transmission teeth 14.

Next, a second embodiment shown in FIG. 3 will be described. The same components as those in the first embodiment are denoted by the same reference numerals. The tooth body 26 according to this embodiment is a one-piece molded metal object. In this embodiment, since the tooth body 26 is integrally molded with metal with high precision, a mold frame for caulking the tooth body 26 and the bases 19 and 20 as in the first embodiment is unnecessary. And the assembling work of both becomes easier.

Next, a third embodiment shown in FIG. 4 will be described. The same components as those in the first embodiment are denoted by the same reference numerals. The divided tooth body 27 in this embodiment includes a metal tooth row portion 271 provided with the power transmission teeth 14 and a flange portion 272 made of synthetic resin. The rapier band 12 is joined to the flange portion 272. The tooth portion 271 and the flange portion 272 are bonded with an adhesive, and the flange portion 27
2 is caulked to the side surfaces of the peripheral portions of the bases 19 and 20 by caulking pins 24.

In this embodiment, the rapier wheel 13 is lighter than in the first embodiment. Next, a fourth embodiment of FIG. 5 will be described. The same components as those in the first embodiment are denoted by the same reference numerals.

The tooth body 28 in this embodiment has a second
The metal toothed portion 28 which is a metal integral member molded in the same manner as in the embodiment of FIG.
1 and an annular connecting portion 282 made of synthetic resin. The tooth row portion 281 and the connecting portion 282 are bonded with an adhesive,
The connecting portion 282 and the peripheral portions of the bases 19 and 20 are bonded with an adhesive.

In this embodiment, the weight of the rapier wheel 13 is further reduced than in the second embodiment. Next, a fifth embodiment shown in FIGS. 6A and 6B will be described. First
The same reference numerals are given to the same components as in the embodiment.

The divided tooth body 29 in this embodiment is
Only one power transmission tooth 14 is provided, and each divided tooth body 29
Is embedded in the support ring 30. The support ring 30 is made of a thermosetting resin (for example, epoxy resin), and the divided teeth 29 are fixed to the support ring 30 when the support ring 30 is thermoset. The precision of the pitch between the teeth 29 is ensured by the mold when the support ring 30 is thermally cured. The support ring 30 is fixed to the side surfaces of the substrates 19 and 20 by the adhesiveness of the thermosetting resin itself during thermosetting.

In this embodiment, the divided teeth 29 are supported on the side surfaces of the bases 19 and 29 via a support ring 30 serving as fastening means. Embedding of the divided tooth bodies 29 in the support ring 30 is easy, and manufacture of the rapier wheel 13 is easy.

Next, a sixth embodiment shown in FIGS. 7A and 7B will be described. The same components as those in the first and fifth embodiments are denoted by the same reference numerals. In this embodiment, a hole 213 is formed at the base end of the divided tooth body 21, and the base end of each divided tooth body 21 is embedded in the support ring 30. The resin of the support ring 30 fills the hole 213, and the connection between the divided tooth body 21 and the support ring 30 is strong. The formation of the hole 213 is effective in reducing the weight of the divided tooth body 21.

Next, a seventh embodiment shown in FIG. 8 will be described. The same components as those in the fifth embodiment are denoted by the same reference numerals. In this embodiment, a hole 141 is formed from the power transmission tooth 14 of the divided tooth body 29 to the base end.
The resin of the support ring 30 has entered a part of the hole 141, and the connection between the divided tooth body 29 and the support ring 30 is strong. The formation of the hole 141 is effective in reducing the weight of the divided tooth body 29.

Next, an eighth embodiment shown in FIGS. 9 and 10 will be described. The same components as those in the first and fifth embodiments are denoted by the same reference numerals. In this embodiment, the power transmission teeth 31 arranged annularly around the periphery of the bases 19 and 20 are formed by bending a metal plate (for example, a stainless plate). A pair of roots 311 of the power transmission teeth 31 are embedded in the support ring 30 in a flared shape. Annular flanges 193 and 203 are formed on opposite sides of the peripheral portions of the bases 19 and 20 so as to face each other. The support ring 30 is fixed to the side surfaces of the peripheral portions of the base bodies 19 and 20 and the flanges 193 and 203. Support ring 30
The power transmission teeth 31 are fixed to the peripheral portions of the bases 19 and 20 via the through holes, and all the power transmission teeth 31 are arranged in an annular array in left-right symmetric molds 35 and 36 shown by chain lines in FIG. Done in state. The power transmission teeth 31 are fixed to the support ring 30 when the support ring 30 made of a thermosetting resin is thermally cured. The accuracy of the pitch between the power transmission teeth 31
Is secured by a mold when thermally curing. The support ring 30 is fixed to the peripheral edges of the substrates 19 and 20 by the adhesive property of the thermosetting resin itself during thermosetting.

In the eighth embodiment, the following effects can be obtained. (8-1) The power transmission teeth 31 are supported on the peripheral edges of the processed bases 19 and 20 via a support ring 30 serving as a support adjusting means. The power transmission teeth 31 supported on the peripheral edges of the bases 19 and 20 via the support ring 30 are not affected by the processing strain of the bases 19 and 20. If the power transmission teeth 31 made of metal which does not cause processing distortion are bent and formed with high accuracy, the shape of the power transmission teeth 31 supported on the side surfaces of the peripheral portions of the bases 19 and 20 is high at the time of formation. Maintain processing accuracy. The arrangement position of the power transmission teeth 31 is defined with high precision by the arrangement in the molds 35 and 36, and the arrangement pitch of the power transmission teeth 31 annularly arranged and supported around the bases 19 and 20 via the support ring 30. Is maintained at the arrangement pitch in the molds 35 and 36. Therefore, the power receiving hole 15 of the rapier band 12 and the power transmission teeth 14 smoothly mesh with each other, and the early wear of the power receiving hole 15 is avoided. (8-2) The plate-shaped power transmission teeth 31 are
Is effective in reducing the moment of inertia around the axis. (8-3) The configuration in which the root 311 of the power transmission tooth 31 is embedded in the support ring 30 serving as the support adjustment means is equivalent to the power transmission tooth 3
1 is hollow inside. The configuration in which the inside of the power transmission teeth 31 is hollow is advantageous in reducing the moment of inertia around the axis of the rapier wheel 13 as compared with the case where the inside of the power transmission teeth 31 is filled with a synthetic resin or an adhesive. (8-4) The configuration in which the support ring 30 is made of a thermosetting resin is effective in connecting a large number of power transmission teeth 31 to the support ring 30 uniformly and easily. (8-5) The power transmission teeth 31 are coupled to the support ring 30 by the adhesive property of the thermosetting resin during thermosetting, and the base 1
The configuration in which the support ring 30 is fixed to the components 9 and 20 improves the ease of assembling the rapier wheel 13.

Next, a ninth embodiment shown in FIG. 11 will be described. The same components as those in the eighth embodiment are denoted by the same reference numerals. In this embodiment, the power transmission teeth 31 are connected to the support ring 30 in advance, and the support ring 30 to which the power transmission teeth 31 are connected is fixed to the side surfaces of the bases 19 and 20 with an adhesive.

In this embodiment, the same effects as those of the items (8-1) to (8-4) in the eighth embodiment can be obtained. Next, a tenth embodiment of FIGS. 12 and 13 will be described. The same components as those in the eighth embodiment are denoted by the same reference numerals.

The rapier wheel 3 in this embodiment
In 4, the power transmission teeth 31 are arranged in a ring around the periphery of one base 32. The power transmission teeth 31 are supported by a peripheral portion of the base 32 via a support ring 33 made of a thermosetting resin. The root 311 of the power transmission tooth 31 is separated from the peripheral edge of the base 32. The fastening of the power transmission teeth 31 to the peripheral edge of the base 32 via the support ring 33 is performed by connecting all the power transmission teeth 31 to a pair of left-right symmetric molds 37, shown by a chain line in FIG.
It is performed in a state where the array is assembled in a ring shape in 38. The power transmission teeth 31 are fixed to the support ring 33 when the support ring 33 made of a thermosetting resin is thermally cured. Support ring 33
Is the substrate 3 due to the adhesiveness of the thermosetting resin itself during thermosetting.
2 is fastened to the periphery.

In the tenth embodiment, the following effects can be obtained. (10-1) The power transmission teeth 31 are supported on the peripheral portion of the processed base 32 via a support ring 33 which is a support adjusting means. The power transmission teeth 31 supported on the periphery of the base 32 via the support ring 33 are not affected by the processing strain of the base 32. The arrangement position of the power transmission teeth 31 is the formwork 37, 3
8 is defined with high precision by the arrangement in the support ring 3
The arrangement pitch of the power transmission teeth 31 annularly arranged and supported around the base 32 through the base 0 is maintained at the arrangement pitch in the molds 37 and 38. Therefore, the power receiving hole 15 of the rapier band 12 and the power transmission teeth 14 smoothly mesh with each other, and the early wear of the power receiving hole 15 is avoided. (10-2) The configuration in which the power transmission teeth 31 are supported by one base 32 is advantageous in reducing the weight of the rapier wheel 34. (10-3) Items (8-2) to (8) in the eighth embodiment
The same effects as in item -5) can be obtained.

The eleventh embodiment shown in FIG. 14, FIG.
As in the twelfth embodiment shown in FIG. 16 and the thirteenth embodiment shown in FIG. 16, cuts 312, 313 or holes 314 are provided at the base 311 of the power transmission teeth 31 so that the power transmission teeth 31 and the support ring 30 May be strengthened. The cuts 312, 313 or holes 314 contribute to the weight reduction of the power transmission teeth 31. Also, as in the fourteenth embodiment of FIG. 17, a plurality of power transmission teeth 31 may be formed by bending one metal plate.

In the present invention, the following embodiments are also possible. (1) The support ring 30 in the ninth embodiment is fixed to the side surfaces of the bases 19 and 20 by caulking pins. (2) The bases 19, 20, 32 are made of synthetic resin containing carbon fiber. Thereby, the strength of the bases 19, 20, and 32 is improved.

[0045]

As described above in detail, according to the present invention, the power transmission teeth are annularly arranged around the peripheral edge of the base and supported by the peripheral edge, and the annular arrangement position of the power transmission teeth is defined. Since the rapier wheel provided with the support adjusting means described above is constructed, there is an excellent effect of extending the life of the rapier band and reducing the weight of the rapier wheel.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention,
The side view which incorporated the principal part enlarged sectional view.

FIG. 2A is a partially cutaway front view. (B) is a front sectional view incorporating a main part enlarged sectional view.

FIG. 3 is a side view showing the second embodiment and incorporating an enlarged sectional view of a main part.

FIG. 4 is a front sectional view showing the third embodiment and incorporating a main part enlarged sectional view;

FIG. 5 is a front sectional view of the fourth embodiment, in which a main part enlarged sectional view is incorporated.

FIG. 6 shows a fifth embodiment, and (a) is an enlarged side sectional view of a main part. (B) is a front sectional view incorporating a main part enlarged sectional view.

FIG. 7 shows the sixth embodiment, and (a) is an enlarged side sectional view of a main part. (B) is a front sectional view incorporating a main part enlarged sectional view.

FIG. 8 shows the seventh embodiment, and FIG. 8 (a) is an enlarged side sectional view of a main part. (B) is a front sectional view incorporating a main part enlarged sectional view.

FIG. 9 is a side view showing the eighth embodiment and incorporating an enlarged sectional view of a main part.

FIG. 10 is a front cross-sectional view incorporating a main part enlarged cross-sectional view.

FIG. 11 is a front sectional view showing the ninth embodiment and incorporating an enlarged sectional view of a main part.

FIG. 12 is a side view showing the tenth embodiment and incorporating an enlarged sectional view of a main part.

FIG. 13 is a front sectional view incorporating a main part enlarged sectional view.

FIG. 14 is a perspective view of a power transmission tooth showing an eleventh embodiment.

FIG. 15 is a perspective view of a power transmission tooth showing a twelfth embodiment.

FIG. 16 is a perspective view of a power transmission tooth showing a thirteenth embodiment.

FIG. 17 is a perspective view of a power transmission tooth showing a fourteenth embodiment.

[Explanation of symbols]

12 ... rapier band, 13, 34 ... rapier wheel, 1
4, 31 ... power transmission teeth, 19, 20, 32 ... base, 2
1, 27: divided teeth, 24: caulking pins constituting fastening means, 25, 26, 28: teeth, 29: divided teeth, 3
0, 33: Support ring serving as support adjustment means.

Claims (11)

[Claims] 1. A rapier band is wound around the periphery of a rapier wheel so that a power transmission tooth of the rapier wheel meshes with a power receiving hole of the rapier band. A weft insertion device in a rapier loom that inserts into the warp shedding and retreats from the warp shedding to insert the weft, comprising: a circular base; and the power transmission teeth formed in a ring around the periphery of the base. The rapier wheel is arranged and supported by the peripheral portion, and comprises a support adjusting means for defining an annular arrangement position of the power transmission teeth, wherein the power transmission teeth are formed of a metal wear-resistant material. A weft insertion device for a rapier loom in which the base is formed from a lightweight material that is lighter than the wear-resistant material. 2. The weft insertion device in a rapier loom according to claim 1, wherein said power transmission teeth are supported on a side surface of a peripheral portion of said base via said support adjusting means. 3. The weft insertion in a rapier loom according to claim 1, wherein the power transmission teeth are supported between the peripheral portions of the pair of bases disposed opposite to each other. apparatus. 4. The power transmission tooth is provided on an annular tooth body attached to a side surface of a peripheral portion of the base, and the support adjusting means fastens the annular tooth body to a side surface of the base. The weft insertion device in a rapier loom according to any one of claims 1 to 3, wherein the weft insertion device is a connecting portion fixed by means. 5. The annular tooth body having at least one power transmission tooth and a plurality of divided tooth bodies attached to a side surface of a peripheral portion of the base in a ring along the peripheral edge of the base. The weft insertion device in the rapier loom according to claim 4, comprising: 6. The fastening means according to claim 4, wherein said fastening means is a caulking pin.
A weft insertion device in a rapier loom according to any one of claims 5 to 7. 7. The weft insertion device in a rapier loom according to claim 4, wherein the tooth body is a molded body. 8. The weft insertion device in a rapier loom according to claim 1, wherein the power transmission teeth are formed by bending a metal plate. 9. The support adjusting means is a support ring fixed to a side surface of the base, and a root of the power transmission tooth is embedded in the support ring. A weft insertion device in a rapier loom according to claim 8. 10. The weft insertion device in a rapier loom according to claim 9, wherein said support ring is made of a thermosetting resin. 11. The weft insertion device in a rapier loom according to claim 1, wherein the base is made of a synthetic resin.