JPS6253448A - Tacking-in selvedge apparatus of fragment loom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a tuck-in selvage assembly device for forming selvage tissue by folding back the end of a beaten weft yarn in a fragmentary loom and inserting it into the next warp opening. .

<Prior Art> As a conventional tuck-in selvage device of this type, there is one described, for example, in Japanese Patent Application Laid-open No. 57-193557.

This system consists of a tuck-in needle that is swingably supported to capture the edge of the beaten weft, turn it around, and insert it into the next warp opening, and a tuck-in needle that mechanically holds the weft edge until it is captured by this needle. It consists of a thread holder (thread gripper) to be gripped, and these are configured to operate at a predetermined timing.

<Problems to be Solved by the Invention> However, in such a conventional tuck-in selvedge assembly device, a mechanical yarn gripper is used to hold the weft end until it is caught by the tuck-in needle. For example, the weft thread may become slack when gripped, or the weft thread may become slack due to loose gripping, which causes uncertainty in the weft capture by the tuck-in needle. When forming a selvedge, the weft end is cut by a cutter and left in a free state for the next weft insertion, but it is very difficult to match the timing of cutting by this cutter with the timing of gripping the weft, and this causes the above-mentioned weft It was also a cause of promoting the occurrence of sagging.

In view of these conventional problems, the present invention does not cause slack in the weft yarn, does not require timing adjustment,
It is an object of the present invention to provide a tuck-in selvage assembly device that can securely capture a weft yarn with a tuck-in needle and form selvage tissues well.

Means for Solving the Problems> In order to solve the above problems, the present invention provides a yarn holder that holds the weft end until it is captured by the tuck-in needle, which uses an air flow to hold the weft end. It consists of an air nozzle that is pulled and held, and this air nozzle type yarn holder is placed approximately on the warp line behind the fabric.

<Function> In the above structure, as soon as the weft end is cut by the cutter and becomes free, it is pulled and held in a tensioned state by the air nozzle type yarn holder, and moreover, the air flow constantly applies tension to the yarn. Therefore, the weft yarn does not become sagging, and the weft yarn can be reliably captured by the tuck-in needle.

<Embodiment> An embodiment of the tuck-in selvage device according to the present invention will be described below with reference to FIGS. 1 to 7. The figure shows the tuck-in selvedge assembly device on the weft insertion side.

Referring to FIGS. 1 to 3, 1 is a warp, 2 is a reed, 3 is a woven fabric, 4 is a woven fabric, and 5 is an expansion rod for width adjustment.

Reference numeral 6 denotes a tuck-in needle, which is fixed via a bracket 9 to the end of an operating rod 8 which protrudes from the gear box 7 and reciprocates in the axial direction and reciprocates angularly.
It is curved as a whole and has a hook portion 6a at the tip, which catches the end of the beaten weft, folds it back, and inserts it into the next warp opening.

10 is a cutter for scissors 2, which has a fixed blade 11 and a movable blade 1.
2, and the ends of the beaten weft are cut.

Reference numeral 13 denotes an air nozzle type yarn holder that pulls and holds the cut end of the weft yarn in a tensioned state until it is captured by the tuck-in needle 6.
It has an L-shaped hollow member 16 that is attached via a pressurized air supply pipe 15 and is supplied with pressurized air, and a pipe 17 that projects downward from the tip of this hollow member 16.
A notch 17a formed on the rear circumferential surface of the pipe 17 is arranged approximately on the warp line behind the weave 3 between the weave selvedge and the cutter 10. In the pipe 17, as shown in FIG. 4, a tapered air jet nozzle 18 is provided facing downward, located above the notch 17a and communicating with the inside of the hollow member 16.

Reference numeral 19 denotes a weft thread guide, which is disposed in line with the cutter 10 and on the opposite side of the cutter 10, and has an inclined guide part 19a and a locking recess 19b, so that the weft thread is guided into the locking recess 19b during the beating process.
It is positioned within the opening of the cutter 10 and within the notch 17a which is the air flow area of the air nozzle type yarn holder 13.

Reference numeral 20 denotes a guide lever, which is rotatably supported by a fixed shaft 21 protruding from the gear box 7, as shown in FIG. 13 between the thread holder 13 and the tuck-in needle 6
When the weft is transferred to the tuck-in needle 6, the weft is swung so as to be pressed toward the tuck-in needle 6.゛Next, Fig. 1 shows the drive mechanism of the tuck-in needle 6.
This will be explained with reference to FIGS. 2 and 6.

A toothed pulley 29 is rotatably supported on a shaft 28 disposed outside the gear box 7 via a toothed belt 27 by a toothed pulley 26 attached to a drive shaft 25 that rotates in synchronization with the rotation of the main shaft of the loom. The gear 30 integrated with the toothed pulley 29 rotates the input shaft 33 which is rotatably supported in the gear box 7 by a bearing 32 via the gear 31.

Two grooved cams 34 and 35 are provided in the gear box 7 and are fixed to the input shaft 33.

A cam follower 37 attached to one end of the slider 36 is positioned in the groove 34a of one of the grooved cams 34, and the other end of the slider 36 is guided by the elongated hole 38a of the guide plate 38. 36 is made to reciprocate. The operating rod 8 of the tuck-in needle 6 is rotatably and slidably inserted into the middle of the slider 36, and the slider 3 of the operating rod 8 is inserted into the middle of the slider 36.
Stoppers 39 and 40 are fixed at the front and rear of the 6-penetrating portion to sandwich the slider 36, and the reciprocating movement of the slider 36 causes the actuating rod 8 to reciprocate in the axial direction.

A cam follower 43 attached to one end of an L-shaped lever 42 rotatably supported by a fixed shaft 41 is positioned in the groove 35a of the other grooved cam 35, and the lever 42 is swung by rotation of the grooved cam 35. It's like letting them do it.

One end of a rod 45 whose length can be adjusted is connected to the other end of the lever 42 via a pole joint 44, and the other end of this rod 45 is connected to a pin 48 fixed to a crank 47 via a ball joint 46. The crank 47 is connected to each other so that the swing of the lever 42 causes the crank 47 to make reciprocating angular movements. This crank 47 has a square hole 47a at the center of rotation, and this square hole 47a is connected to the square shaft portion 49 of a connecting rod 49 that is connected and fixed to the end of the operating rod 8 of the tuck-in needle 6.
The connecting rod 4 is fitted in a non-rotatable but slidable manner in the axial direction, so that the reciprocating angular movement of the crank 47
The actuating rod 8 is caused to make reciprocating angular movement via the actuating rod 9.

Next, the drive mechanism of the cutter 10 and the guide lever 20 will be explained with reference to FIGS. 1, 2, and 5.

A gear 50 is fixed to the input shaft 33 in the gear box 7,
This gear 50 drives an output shaft 53 rotatably supported by a bearing 52 via a gear 51 in synchronization with the rotation of the main shaft of the loom. The end of this output shaft 53 is made to protrude outside the gear box 7, and two cams 54.5 are attached thereto.
5 is fixed.

A cam follower 59 attached to one end of a canter lever 58, which is rotatably supported by a fixed shaft 56 protruding from the gear box 7 and biased by a spring 57, is brought into contact with the cam 54 on the - side. The rotation of the cam 54 causes the canter lever 58 to swing. and,
A shaft 60 is fixed to the other end of the cutter lever 58, and this shaft 6
The movable blade 12 of the cutter 10 is fixed to the attachment part 61 at the end of the cutter 10.

A cam follower 63 attached to the guide lever 20 rotatably supported by the fixed shaft 21 and biased by a spring 62 is brought into contact with the other cam 55, and the rotation of the cam 55 causes the guide lever 20 to swing. It's like letting them do it.

Next, the effect will be explained.

After the weft has been inserted, when the reed is beaten by the advance of the reed 2, the weft moves along the inclined guide portion 19a at the weft guide 19, and finally enters the locking recess 19b and is locked, and Even if 2 moves backward, it will remain in this position. and,
In this position, the weft yarn stretched between the selvage and the weft yarn guide 19 is located within the opening of the cutter 10 and within the notch 17a of the vibrator 17 of the air nozzle type yarn holder 13 (Fig. 4). state of A). In addition, cutter 10 of reed 2. Air nozzle quantity system retainer 13. The parts facing the weft guide 19 and the guide lever 20 are removed.

Here, the timing of beating the reed is determined by the rotation angle of the loom main shaft.
Then, at about 5 degrees, the movable blade 12 of the cutter 10 is driven by the cam 54 via the cutter lever 58, and the weft is cut in cooperation with the fixed blade 11.

At this time, the weft yarn between the weaving selvage and the cutter 10 is connected to the notch 1 which is the air flow area of the air nozzle type yarn holder 13.
7a, so when the weft is cut by the cutter 10, the cut end of the weft on the selvage side is exposed to the air jet from the air jet nozzle 18 in the pipe 17 and the suction air flow generated around it. Due to the action of the notch 17a
It is sucked into the vibrator 17 from above and is pulled and held by the air flow (state shown in FIG. 4B). This state of pulling and holding continues until the weft is delivered to the tuck-in needle 6 after the next weft insertion (however, since the weft is pulled and held by the air flow, no slack occurs).

Next, the next weft is inserted from about 90 degrees and the beating process begins, but the tuck-in needle 6 is inserted at its tip (
The hook portion 6a) is moved as shown in FIGS. 2 and 3, and the range of movement in the front and back direction is shown in FIG.
From ° to 200°, it swings downward while gradually approaching the front 3 side in the front-rear direction from above one row of warp threads near the front 3, passing through the upper warp 1 on the way and entering the opening. Then, the warp yarn is pulled out of one row and passes under the weft end stretched between the weaving selvedge and the air nozzle type yarn holder 13, diagonally intersecting with the weft end. Eventually, the hook portion 6a reaches a position slightly above the warp line (see FIG. 3).

Then, the tuck-in needle 6 starts to swing in the opposite direction from 200°, but at this time, the cam 55 causes the guide lever 20 to swing counterclockwise in FIG. The weft end stretched between the container 13 and the weft thread is pressed toward the tuck-in needle 6. As a result, when the tuck-in needle 6 swings in the opposite direction, the weft end is surely caught by the hook portion 6a, and the tip of the tuck-in needle 6 returns to the warp shedding in the caught state, so that the weft end The section is folded back as shown by the chain line in FIG. 7 and inserted into the next warp opening in the opposite phase to the section that has already been woven into the fabric 4.

Then, at around 270 degrees, the tuck-in needle 6 escapes from the warp opening by scraping the upper warp 1, and then also escapes from the reed beating path of the reed 2.

When the inserted weft is beaten by the advance of the reed 2, the weft end, which has been folded back at the selvage part and inserted into the warp opening as described above, is beaten at the same time, and the selvedge tissue is beaten. is formed.

It is preferable that a throttle valve or the like be interposed in the path for supplying pressurized air to the air nozzle type yarn holder 13 so that the air supply pressure can be changed depending on the type of yarn.

Further, it is also possible to always supply pressurized air to the air nozzle type yarn holder 13 and blow it out, but a control valve that opens and closes at a predetermined timing is interposed in the pressure air supply path, and at least Air may be ejected only from immediately before cutting of the weft by the cutter 10 until the end of delivery of the weft to the tuck-in needle 6, thereby reducing the consumption of pressurized air.

Further, in the above embodiment, the tuck-in selvage assembly device on the weft insertion side has been described, but it goes without saying that the tuck-in selvage assembly device on the non-weft insertion side or for the middle selvedge can also be constructed in the same manner.

<Effects of the Invention> As explained above, according to the present invention, the weft end in a free state is pulled and held in a tensioned state by the action of the air flow until it is captured by the tuck-in needle.
There is no slack in the weft yarn, no timing adjustment is required, and the tuck-in needle can securely capture the weft yarn, resulting in the formation of a good selvage tissue.

[Brief explanation of drawings]

Fig. 1 is a front view of a tuck-in selvage assembly device seen from the side of a loom showing an embodiment of the present invention, Fig. 2 is a plan view of the same as the above, Fig. 3 is a left side view of the same as the above, and Fig. 4 is a 5 is a front view of the guide lever portion, FIG. 6 is a sectional view of the inside of the gear box, and FIG. 7 is a diagram of the structure of the selvedge. 1... Warp 2... Reed 3... Orimae 4.
...Woven fabric 6...Tuck-in needle 10...Cutter 13...Air nozzle type thread holder 17...
Pipe 17a...Notch 18...Air jet nozzle 19...Weft guide 20...Guidance lever patent applicant Nissan Motor Co., Ltd. agent Patent attorney Fujio SasashimaFigure 4

Claims (1)

[Claims] A tuck-in needle (6) that is swingably supported to catch the end of the beaten weft, fold it back, and insert it into the next warp opening, and a thread that holds the weft end until it is caught by this needle. In the tuck-in selvage device for a piece loom having a retainer, the yarn retainer is constituted by an air nozzle (13) that pulls and holds the weft ends by the action of an air flow,
A tuck-in selvage device for a fragment loom, characterized in that it is disposed approximately on the warp line behind the weave (3).