JP2598958Y2 - Weft automatic switching continuous feeder - Google Patents

Description

[Detailed description of the invention]

[0001]

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

[0002]

2. Description of the Related Art Conventionally, when a weft is sent to a weaving machine, a weft wound around a weft drum is taken as one lot, and one lot is assigned to each loom, and one weft is sent from each weft drum. . In recent years, automatic and continuous equipment has been used for such work, achieving a significant improvement in work efficiency (Japanese Patent Application No. 5-175475).

[0003]

[Problems to be Solved by the Invention] However, in the conventional feeding of the weft as described above, even if a lot of the same color is allocated to each loom, the weaving is not performed because of the delicate shading and darkness in the same color that occurs during the manufacture of the weft. Color unevenness occurs in the raised product,
This has been a major problem in making the work automatic and continuous. Therefore, an apparatus capable of obtaining a high-quality woven fabric or patterned woven fabric even if the operation of weft feeding is automatically and continuously performed regardless of shading, lightness and darkness of the weft yarn, and further regardless of color and type.

[0004]

As a result, a plurality of wefts 10 are transferred from a plurality of weft drums 1 to a yarn feeding upper roll 6 and a yarn feeding lower.
A plurality of nozzles 2 that individually pass through the wefts that have been sent out so as to be slack with the rolls 8 are parallel to each other and the middle
The wefts 10 that are cut and connected in a substantially side-by-side manner so as to form a nozzle front part 2a and a nozzle rear part 2b, and the weft 10 exposed at the cut part of the nozzle
The delivery roll 16 and delivery pulley 17 that deliver a predetermined length
The nozzles are arranged so that they can approach and separate from each other, and the nozzles
Nozzle switching means capable of automatically switching to the position of the pull-out pulley 17 in conjunction with the feeding of the weft, specifically, a nozzle cam 4 having a sliding contact edge 3 divided into the number of arranged weft drums.
The nozzle lever 5 which can slide to the left and right while sliding on
We have devised an automatic weft switching continuous feeding device provided with a means connected to.

[0005] A weft can be used instead of the weft. The nozzle switching means may be either electrical or mechanical. When a nozzle cam is used as a mechanical method, the positional relationship of the nozzles to be arranged may be such that a line connecting a cross section perpendicular to the direction in which the weft is fed draws an arc equidistant from the rotation axis of the nozzle lever. .

[0006]

The weft automatic switching continuous feeder of the present invention automatically switches the plurality of nozzles 2 or the entirety of these nozzles in conjunction with the weft to be sent out, so that wefts of the same color with different shades, lightness and darkness, or different colors and types. Can be used interchangeably. For example, the nozzle 2 or the nozzle lever 5 connected to the entire nozzle is slidably brought into contact with the nozzle cams 4 divided by the same number as the nozzles arranged with the sent out weft, thereby swinging stepwise, and sending out the weft to the warp. Each time, the position of the nozzle 2, that is, the weft to be sent out is switched.

When the above-mentioned mechanical nozzle switching means is employed, the plurality of nozzles 2 are parallel to each other, and a line connecting the cross sections perpendicular to the direction in which the weft is sent out from the rotation axis of the nozzle lever 5. By drawing a circular arc of the distance, even if the connecting point between the nozzle 2 and the nozzle lever 5 draws a circular locus, the position where the weft is sent out from the switched nozzle 2 can be the same.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a continuous automatic weft feeder according to the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of an automatic weft automatic switching continuous feeder in which two lots of the same color are arranged, and two nozzles are mechanically switched every two wefts in response to the feed of the weft. FIG. 2 is a schematic perspective view showing the relationship of main mechanisms in FIG. 2, FIG. 2 is a partially cutaway front view showing a mechanism of a delivery pulley for delivering a weft between the front part and the rear part of the nozzle of the embodiment, and FIG. Partially broken front view showing the mechanism of the delivery roll that sends out the weft in pairs with
FIG. 4 is a partially cutaway front view showing a mechanism for automatically switching the front part and the rear part of the nozzle, and FIG. 5 shows the positional relationship between the delivery pulley, the delivery roll, the nozzle front part and the rear part shown in FIGS. It is the principal part side view shown.

The weft 10 sent out from the weft drum 1 (right hand in FIG. 1) is sandwiched between a passivating upper yarn roll 6 and a lower yarn roll 8 driven by a motor 7, and the respective nozzles from there. Inserted into the rear part 2b. An optical sensor 9 is connected to the motor 7 and is constantly monitored by the optical sensor 9 so that the sent out weft yarn 10 has a sufficient slack. This is so that the weft 10 can be inserted into the rear part 2b of the nozzle without applying a load. When the slack of the weft 10 disappears due to some trouble, this is detected by the optical sensor 9, and the lower yarn delivery roll 8 is moved at a high speed. By rotating, the weft 10 is slackened again. The motor 7 is controlled by an inverter, and automatically returns to a normal rotation after a predetermined time.

The weft thread 10 inserted into the nozzle rear part 2b is passed to the weft guiding claw 11 through the nozzle front part 2a and interwoven with the warp yarn 12. The cutter 13 disposed between the weft guide claw 11 and the nozzle front part 2a is periodically operated in accordance with the swing of the cutter lever 15 by the cutter cam 14 interlocking with the switching of the weft 10, and the weft having a fixed length. 10 can be woven into the warp 12.

The weft 10 is sandwiched between a delivery roll 16 and a delivery pulley 17 disposed between the nozzle front part 2a and the nozzle rear part 2b, and the weft 10 is delivered while the delivery roll 16 and the delivery pulley 17 are in close contact. Each rotates. As shown in FIGS. 1 and 2, the rotation of the delivery crank 19 coaxial with the nozzle cam 4 is performed by rotating the crank rod 20 through the large-diameter crank gear 21a, the small-diameter crank gear 21b, the large-diameter bevel gear 22a, and the small-diameter bevel gear 22b. twenty three
Is rotated. The rotation of the delivery pulley 17 rotates the lower cam gear 25 via the upper cam gear 24 coaxial with the delivery pulley 17.

A brake band 27 fixed via a spring 26 is wound around the lower cam gear 25, so that the lower cam gear 25 cannot rotate more than a predetermined amount, and when the delivery pulley 17 rotates a predetermined amount. With cam clutch 23
As a result, the power from the delivery crank 19 is cut off, the delivery pulley 17 is rotated in the reverse direction, and the action of stretching the delivered weft is also provided. The delivery pulley 17 is configured to send out one weft when the crank 19 makes one rotation, and to rotate in the reverse direction after sending out one weft.

As shown in FIGS. 1 and 3, the delivery roll 16 disposed opposite the delivery pulley 17 is axially mounted above a roll vertical rod 28. The roll up / down rod 28 is moved up and down by a roll up / down lever 30 slidably in contact with a roll up / down cam 29 to bring the delivery roll 16 into close contact with or away from the delivery pulley 17. The roll vertical cam 29 is rotated in conjunction with the nozzle cam 4 so that the delivery roll 16 moves up and down after one weft is delivered, that is, when the delivery pulley 17 rotates in the reverse direction.

As shown in FIGS. 1, 4 and 5, the front part 2a and the rear part 2b of the nozzle pass through the weft 10 with a delivery roll 16 and a delivery pulley 17 interposed therebetween. The nozzle front part 2a is supported by the bent front nozzle lever 5a, and the nozzle rear part 2b is supported by the rear nozzle lever 5b attached to the nozzle shaft 32 extending from the rotation shaft 31 of the front nozzle lever 5a, and is interlocked. I am trying to do it.

The two nozzle front portions 2a and the nozzle rear portions 2b are arranged in parallel and on a circular arc equidistant from the rotation axis 31 of the front nozzle lever 5a, with the cross sections perpendicular to the weft feeding direction arranged side by side. The front nozzle lever 5a swings by sliding the sliding contact edge 3 divided into two sections into the nozzle cam 4 assigned to the large diameter and the small diameter, and every time the same two wefts are sent out, the weft guiding claw 11 is rotated.
The weft yarn 10 is switched by bringing any one of the nozzle front portions 2a onto the axis corresponding to.

In the first embodiment, the nozzle cam 4, the roll upper / lower cam 28, and the delivery crank 19 are fed with one weft thread per rotation of the delivery crank, and the nozzle cam is moved.
It is possible to mechanically set all operation timings such as 1/4 turn and switching of the nozzle every time two wefts are sent out. The switching of the weft, that is, the switching of the nozzle, is performed by, for example, taking a timing by an optical sensor and operating a mechanical cylinder to combine a mechanical and electrical method, or using a stepping motor instead of the cylinder. All can be performed electrically. Further, by increasing the number of nozzles, the range of application of the apparatus can be increased.

For example, FIG. 6 shows a front view of an automatic weft switching mechanism for switching the wefts from four lots of weft drums and folding them into warps as a second embodiment. This is because the nozzle of the first embodiment has four nozzles, the sliding edge 42 of the nozzle cam 41 for slidingly contacting the nozzle lever 40 is divided into four sections, diameters corresponding to the respective nozzles are assigned to each section, and each time one weft is sent out. The nozzle can be switched to another. In other words, the other mechanisms are the same as those of the first embodiment, which means that one to four types of wefts can be selected and used by replacing even the nozzle cam. The fact that a large number of wefts can be used means that not only a lot of the same color is used to avoid color unevenness, but also a pattern fabric can be woven using a lot of another color. Depending on the nozzle cam shape, the nozzles, that is, the wefts, can be switched in a specific order instead of the arrangement order.

[0018]

According to the automatic weft automatic switching continuous feeder of the present invention, it is possible to eliminate unevenness in color of a product due to shading, lightness and darkness of the same color, and to maintain uniform quality. For this reason, the weft feeding can be automatically and continuously performed, and all the processes for manufacturing the fabric can be automatically and continuously performed, which leads to an improvement in productivity.

In addition, the work of weaving a patterned fabric by mixing a plurality of wefts of different colors by utilizing the switching of the wefts,
Automatic, can be continuous, various fabrics efficiently,
In addition, mass production can be performed while maintaining uniform quality.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a continuous automatic weft switching continuous feeding device according to a first embodiment.

FIG. 2 is a partially cutaway front view of the delivery pulley of the embodiment.

FIG. 3 is a partially cutaway front view of the delivery roll of the embodiment.

FIG. 4 is a partially cutaway front view of a front portion and a rear portion of the nozzle of the embodiment.

FIG. 5 is a side view of a main part of the embodiment.

FIG. 6 is a front view of a front portion and a rear portion of a nozzle according to a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Weft drum 2 Nozzle 2a Nozzle front part 2b Nozzle rear part 3 Sliding contact edge 4 Nozzle cam 5 Nozzle lever 5a Front nozzle lever 5b Rear nozzle lever 32 Nozzle shaft

Claims (2)

(57) [Scope of request for utility model registration] 1. A plurality of wefts 10 from a plurality of weft drums 1.
Both the upper thread take-up roll 6 and the lower thread take-up roll 8 have enough room.
A plurality of nozzles 2 which individually pass through the wefts sent out so as to be slack are parallel to each other and cut off in the middle, and the nozzles 2
The nozzles are connected side by side so as to form the rear part 2b ,
Feeder that feeds the weft 10 exposed to the
Roller 16 and the delivery pulley 17
A weft automatic switching continuous feeding device comprising nozzle switching means capable of automatically switching a plurality of nozzles alternately to the position of the feed pulley 17 in conjunction with the feeding of the weft. 2. The automatic nozzle switching means according to claim 1,
A nozzle lever 5 which can slide to the left and right by sliding on a nozzle cam 4 having a sliding contact edge 3 divided into the number of arranged weft drums;
Is automatically connected to the nozzle 2.