JPH1072744A - Weft-selection apparatus for loom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the diameter of a threading hole of a selection lever and improve the yarn handleability. SOLUTION: Rotary actuators 19-26 are placed on a supporting base 14. Supporting shafts are supported on a shaft-supporting member 35 attached to the upper face of the supporting base 14. Selection levers 60-67 are fixed to the supporting shafts. The rotary actuators 19-26 are rotatable in normal and reverse directions and the normal or reverse rotation is transmitted to the selection levers 60-67. The rotary actuators 19-26 are tilted from the weft- insertion direction by an angle θ and the selection levers 60-67 are tilted from the yarn direction of the warp T by an angle θ.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weft for weaving a woven fabric together with a warp by driving one of a plurality of selection levers for switching between a standby position and a weft insertion position. The present invention relates to a weft selecting device in a loom that is selectively arranged at a putting position.

[0002]

2. Description of the Related Art JP-A-61-43282, JP-A-62-289649, and JP-A-63-264951.
Of the weft selecting device disclosed in
In the apparatus disclosed in Japanese Patent No. 289649, the weft is switched between a standby position and a weft insertion position by a supply needle. The supply needle is guided through a plurality of guide holes. However, such a guide type has a large slide resistance and is not suitable for increasing the speed of a loom. JP-A-61-43282, JP-A-63
In the device disclosed in Japanese Patent No. 264951, the weft is switched between a standby position and a weft insertion position by a selection lever. Such a lever type does not have the problem of the slide resistance described above, and is suitable for speeding up the loom.

[0003]

The weft is passed through the yarn hole at the tip of the selection lever, but the yarn holes are arranged shifted in the warp yarn direction in order to avoid interference between adjacent weft yarns. The standby position of the yarn hole is above the weft insertion position of the weft,
The yarn holes are vertically switched between a standby position and a weft insertion position. When inserting the weft in the yarn hole, the work is easier if the diameter of the yarn hole is larger. However, when the yarn holes are enlarged, the arrangement length of the yarn holes is increased, and this arrangement direction is the yarn direction of the warp. In the loom, the yarn direction of the warp and the weaving width direction orthogonal thereto are considered as the reference direction, and a drive shaft for driving the selection lever is also provided in the weaving width direction. Therefore, the selection lever is disposed so as to face a direction orthogonal to the weaving width direction. In such an arrangement of the selection lever, if the arrangement length of the yarn holes is to be increased, the selection lever becomes longer in the warp yarn direction. Due to the positional relationship, it is difficult to increase the length of the selection lever. Therefore, it is difficult to increase the diameter of the yarn hole.

When the length of the selection lever is increased in order to increase the arrangement length, the distance between the foremost heald frame and the cloth fell must be increased, and the opening angle of the warp decreases, and the warp is released. Worsens, and adversely affects weft insertion.

An object of the present invention is to increase the diameter of a yarn hole in a selection lever and improve the handling of a warp.

[0006]

According to the first aspect of the present invention, the selection lever is disposed obliquely in a direction oblique to the yarn direction of the warp, and the rotation center axes of the selection levers are aligned with the selection levers. Orthogonal to.

[0007] By obliquely moving the selection lever with respect to the warp yarn direction, the arrangement length of the yarn holes that can be taken within a section having the same length in the warp yarn direction increases. Therefore, the arrangement length of the yarn holes can be increased as compared with the conventional case, and the hole diameter of the yarn holes can be increased. In addition, the heald frame at the forefront can be made closer to the weave front side as compared with a conventional yarn hole having the same arrangement length, and the warp handling becomes better.

According to the second aspect of the present invention, the drive means of the selection lever is made independent of the drive source of the loom, and the selection lever and the drive means are in one-to-one correspondence. Wefts are now selectively positioned at the weft insertion position.

The use of the drive means independent of the loom drive source facilitates the setting of the rotation center axis of the selection lever oblique to the warp yarn direction. In the invention of claim 3, a rotary actuator is employed as the driving means, and an output shaft of the rotary actuator is orthogonal to the selection lever.

The center axis of the selection lever is parallel to the output shaft of the rotary actuator, and the rotational driving force of the rotary actuator is efficiently transmitted to the selection lever. In the invention according to claim 4, the distance between the rotation center of the selection lever and the thread hole of the selection lever is the same for all the selection levers, the position passing through the weft insertion position of the thread hole, and the selection The rotation center of each selection lever is arranged on an arc centered on a straight line parallel to the axis of rotation of the lever, and the passing position, and the thread hole on another arc centered on the parallel straight line. The standby position has been set.

When the selection lever is arranged from the standby position to the weft insertion position, the yarn holes are arranged on a straight line in the weft insertion direction.
Therefore, a member that grips and inserts weft yarns holds and inserts all weft yarns at substantially the same position.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is embodied in a rapier loom will be described below with reference to FIGS.

As shown in FIG. 1, a breast beam 12 is arranged along the weft insertion direction beside the weft insertion path of the transfer rapier head 11.
A guide plate 13 is mounted on the upper side. A pair of mounting grooves 131 are formed in parallel on the upper surface of the guide plate 13. A support base 14 is mounted on the guide plate 13. The support base 14 is fixed on the guide plate 13 by a plurality of bolts 15. As shown in FIG. 3, the tip of the bolt 15 is screwed into the nut 16 in the mounting groove 131. The rotation of the nut 16 in the mounting groove 131 is restricted.
By rotating the bolt 15 in the tightening direction, the bolt 15 and the nut 16 are tightened and fixed to the guide plate 13. By loosening the tightening between the bolt 15 and the nut 16, the mounting position of the support base 14 in the longitudinal direction of the guide plate 13 can be changed.

A pair of mounting plates 17 and 18 are vertically supported on the support base 14. Four rotary solenoids or rotary actuators 19, 20, 21, 22 such as stepping motors are provided on the surface of the mounting plate 17 facing the mounting plate 18.
Is attached. Four rotary solenoids or rotary actuators 23, 24, 25, 26 such as stepping motors are mounted on the surface of the mounting plate 18 facing the mounting plate 17. The output shafts 191, 201, 211, 221 of the rotary actuators 19 to 22 penetrate the mounting plate 17 and protrude on the side of the mounting plate 17 facing the mounting plate 18. Output shafts 231, 241 and 25 of the rotary actuators 23 to 26
The reference numerals 1 and 261 penetrate the mounting plate 18 and protrude on the side of the mounting plate 18 facing the mounting plate 17.

As shown in FIG. 1, a shaft support 35 is fixed on the support base 14. As shown in FIGS. 2 and 3, the shaft support 35 has support shafts 36, 37, 38, 39, 4.
0, 41, 42 and 43 are rotatably supported. The support shafts 36 to 43 are arranged in an arc shape. As shown in FIG. 2, driven levers 44, 45, 46,
47 are fixed, and as shown in FIG.
Driven levers 48, 49, 50, 51 are fixed to 3. As shown in FIG. 2, drive levers 27, 28, 29, and 30 are fixed to projecting ends of the output shafts 191 to 221. As shown in FIG. 3, drive levers 31, 32, 33, and 34 are fixed to protruding ends of the output shafts 231 to 261. Drive levers 27-34 and driven levers 44-5
1 and 1 to 1 connecting rods 52, 53, 5
4,55,56,57,58,59.

Selection levers 60, 6 are provided on the support shafts 36 to 43.
1, 62, 63, 64, 65, 66, 67 are fixed. The rotary actuators 19 to 26 rotate forward and backward, and the forward and reverse rotations are transmitted to the support shafts 36 to 43 via the drive levers 27 to 34, the connecting rods 52 to 59, and the driven levers 44 to 51. By the forward rotation of the rotary actuators 19 to 26, the selection levers 60 to 67 are rotated down from the standby positions shown in FIGS. 2 and 3 around the support shafts 36 to 43. Next, the rotary actuators 19 to
The selection levers 60 to 67 are rotated by the reverse rotation of
It turns around 3 ascending.

A thread hole 6 is provided at the tip of the selection levers 60-67.
01, 611, 621, 631, 641, 651, 66
1,671 are formed. Weft yarns Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y
8 is inserted. The weft yarns Y1 to Y8 are
It is arranged at a weft insertion position that intersects the traveling path of the delivery rapier head 11 due to the rotation and lowering of ~ 67. In FIG. 4, the weft Y1 is arranged at the weft insertion position, and the delivery rapier head 11 is in a state of gripping the weft Y1. The transfer rapier head 11 transfers the gripped weft to a receiving rapier head (not shown) at the center of the weaving width.

As shown in FIGS. 1 and 4, the rotary actuators 19 to 26 are arranged obliquely at an angle θ with respect to the weft direction of the woven fabric W, ie, the weft insertion direction. The support shafts 36 to 43 are the rotary actuators 19 to
26 are parallel to the output shafts 191-261,
The selection levers 60 to 67 are orthogonal to the support shafts 36 to 43. Therefore, the selection levers 60 to 67 are oblique to the yarn direction of the warp T by an angle θ. 68 is the foremost heald frame.

As shown in FIGS. 2 and 3, weft yarns Y1 to Y
The thread holes 601 to 671 of the selection levers 60 to 67 in which 8 is arranged at the weft insertion position are arranged on a straight line L1 in the weft insertion direction. When the yarn holes 601 to 671 pass through the weft insertion position and go further downward, the yarn holes 601 to 671 become straight lines L shown in FIG.
2 above. The support shafts 36 to 43 are arranged on an arc C1 centered on the straight line L2. As shown in FIGS. 2 and 3, the thread holes 6 of the selection levers 60 to 67 at the standby position are provided.
01 to 671 are arranged on an arc C2 centered on the straight line L2. The thread holes 601 to 671 are aligned on the straight line L1 at the weft insertion position. The oblique arrangement of the support shafts 36 to 43, the orthogonal arrangement of the selection levers 60 to 67 with respect to the support shafts 36 to 43, and the support shafts 36 to 43. , Arc-shaped arrangement of thread holes 601 to 671 at the standby position, selection lever 6
It depends on the relationship of the same shape and the same size of 0 to 67.

In the first embodiment, the following effects can be obtained. (1-1) Selection levers 60 to 67 for the yarn direction of the warp T
At the same length in the yarn direction of the warp T
The arrangement length K of the thread holes 601 to 671 that can be taken inside becomes large. Therefore, the arrangement length K of the yarn holes 601 to 671 is
Can be increased more than before, and the hole diameter of the yarn holes 601 to 671 can be increased. In addition, the heald frame 68 at the forefront can be brought closer to the front W1 side of the woven fabric W as compared with the conventional yarn holes having the same arrangement length, and the warp handling becomes better. (1-2) The shortening of the selection levers 60 to 67 is achieved by the selection lever 6
This results in a reduction in the inertia moment of 0 to 67, and allows the use of the rotary actuators 19 to 26 having a small torque. (1-3) The selection levers 60 to 67 are in one-to-one correspondence with the rotary actuators 19 to 26 that are independent of the loom drive source, and are driven by any of the rotary actuators 19 to 26 to drive the weft yarns Y1 to Y8. Is selected and arranged at the weft insertion position. Rotary actuator 1
9 to 26 are mounting plates 17 on the support base 14,
The mounting direction is easily set by the mounting plates 17 and 18 with respect to the support base 14. Therefore, the configuration in which the driving means independent of the loom driving source is adopted as the driving means of the selection levers 60 to 67 is such that the selection levers 60 to oblique to the yarn direction of the warp T
The setting of the rotation center axis of 67, that is, the axial direction of the support shaft 36 is facilitated. (1-4) Support shaft 3 which is the central axis of selection levers 60 to 67
6 to 43 are parallel to the output shafts 191 to 261 of the rotary actuators 19 to 26. Selection lever 60-67
Rotary actuator 19 employed as driving means for
To 26, the selection levers 60 to 67 can be efficiently used.
Is transmitted to (1-5) When the selection levers 60 to 67 are arranged from the standby position to the weft insertion position, the yarn holes 601 to 671 are arranged on the straight line L1 in the weft insertion direction. Therefore, the delivery rapier head 1 which is a member for gripping and wefting the wefts Y1 to Y8
Numeral 1 designates a state in which all the wefts Y1 to Y8 are gripped and inserted at substantially the same position, and the wefts Y1 to Y
8 is securely held. (1-6) In a rapier loom in which the delivery rapier head 11 and the delivery rapier head meet at the center of the weaving width, the encounter position between the delivery rapier head 11 and the delivery rapier head is not changed even when the weaving width is changed. There is a center reference method. When the weaving width is changed in such a center reference system, the selection levers 60 to 67 are moved in the weft insertion direction. Therefore, when the weaving width is changed in the decreasing direction, the selection levers 60 to 6
7 is disposed on the position side where it interferes with the foremost heald frame 68.
That is, the present invention is suitable for application to a center-based rapier loom.

Next, a second embodiment shown in FIGS. 5 and 6 will be described. The same components as those in the first embodiment are denoted by the same reference numerals. In this embodiment, drive timing pulleys 69, 70, 71, 72, 73, 74, 7 are attached to output shafts 191 to 261 of rotary actuators 19 to 26.
5, 76 are fixed, and driven timing pulleys 77, 78, 79, 80, 81, 82, 8 are attached to the support shafts 36 to 43.
3, 84 are fixed. Drive timing pulley 69
To timing belts 85, 86, 87, 88, 89, 90, 9
1,92,93 are spanned. Output shaft 191-2
The rotation of 61 is achieved by driving timing pulleys 69-76, timing belts 85-93, driven timing pulleys 77-76.
84 and the selection levers 60-67 via the support shafts 36-43.
Is transmitted to

In this embodiment, the same effects as in the first embodiment can be obtained. In the present invention, a linear actuator may be used instead of the rotary actuator, and reciprocating linear driving of the linear actuator may be converted into reciprocating rotation and transmitted to the selection lever. As a mechanism for converting the reciprocating linear drive into the reciprocating rotation, a crank mechanism, a rack-pinion mechanism, or the like can be employed.

[0023]

As described above in detail, in the present invention, the selection levers are arranged obliquely in the direction oblique to the warp yarn direction, and the rotation center axes of the respective selection levers are perpendicular to the selection levers. Therefore, there is an excellent effect that the diameter of the yarn hole in the selection lever can be increased and the warp handling can be improved.

[Brief description of the drawings]

FIG. 1 is a main part plan view showing a first embodiment.

FIG. 2 is a sectional side view of a main part showing a half of a selection lever.

FIG. 3 is a sectional side view of a main part showing the remaining half of the selection lever.

FIG. 4 is an essential part plan view showing a state in which the weft arranged at the weft insertion position by the downward movement of the selection lever is gripped by a transfer rapier head.

FIG. 5 is a sectional side view of a main part showing a second embodiment and showing half of selection levers.

FIG. 6 is a side sectional view of a main part showing the other half of the selection lever.

[Explanation of symbols]

19-26 ... Rotary actuator, 191-261
... Output shafts, 36 to 43... Support shafts serving as rotation center axes of the selection levers, 60 to 67... Selection levers, 601 to 671.

Claims (4)

[Claims] A weft for weaving a woven fabric together with a warp is selectively switched between a standby position and a weft insertion position by driving one of a plurality of selection levers to move the weft to the weft insertion position. In the weft selecting device for a loom, the weft in a loom in which the selection lever is disposed obliquely to a direction oblique to the yarn direction of the warp, and a rotation center axis of each selection lever is orthogonal to the selection lever. Selection device. 2. The drive means for the selection lever is independent of a loom drive source, and the selection lever and the drive means are connected to one another.
2. The weft selecting device in a loom according to claim 1, wherein the weft is selected and arranged at a weft insertion position by one of the driving means so as to correspond to a pair. 3. A weft selecting device in a loom according to claim 2, wherein said driving means is a rotary actuator, and an output shaft of said rotary actuator is orthogonal to said selection lever. 4. The distance between the rotation center of the selection lever and the thread hole of the selection lever is the same for all the selection levers, and the rotation center of each selection lever is the weft insertion position of the thread hole. Are located on an arc centered on a straight line parallel to the rotation center axis of the selection lever,
4. The weft selecting device in a loom according to claim 1, wherein a standby position of the yarn hole is set on the passing position and another arc centered on the parallel straight line. 5.