JPH0627674Y2 - Tuck-in selvedge device for fragment loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a tuck-in selvage device that forms an ear tissue by folding back the end of a beating thread wefted in a fragment loom and inserting it into the next warp opening. .

<Prior Art> Conventionally, as a tuck-in selvage device of this type, there is, for example, a device described in JP-A-57-193557.

This is a tuck-in needle that catches the end of the beating beaten and cut, folds and swings to be inserted into the next warp opening, and a tuck-in needle that is provided on the selvage side of the cutter for cutting the weft. Thread retainer that holds the weft thread end until it is caught by
Are provided, and these are operated at a predetermined timing to form a tuck-in ear.

<Problems to be Solved by the Invention> However, in such a conventional tuck-in selvage device, the tuck-in needle moves so as not to collide with the yarn retainer or the cutter, but there is play in the drive system, such as a gear. However, there is a problem in that the tuck-in needle may overrun due to the amount of backlash, etc., and the tuck-in needle may come into contact with or collide with the yarn retainer or the cutter, resulting in damage to the tuck-in needle.

The present invention has been made in view of such conventional problems, and an object thereof is to prevent contact and collision with other components due to overrun of the tuck-in needle.

<Means for Solving Problems> For this reason, the present invention proposes a tuck-in needle that captures the end of a beating weft and oscillates so that it is folded back and inserted into the next warp shed. And a yarn retainer that holds the weft yarn end portion until the end of the weft yarn, and the tip of the tuck-in needle advances from the warp opening to the yarn retainer side, moves in parallel with the succeeding warp yarn, and further advances to the yarn retainer side. In the tuck-in selvedge device of the loom, the swinging of the tuck-in needle toward the yarn retainer side relative to the member swinging together with the tuck-in needle is regulated over a predetermined length that moves in parallel with the warp thread. The stopper provided is provided.

<Operation> Even if the tuck-in needle drive system has rattling, it is possible to prevent the tuck-in needle from swinging to the thread retainer side at any time by the stopper that is always fixed and provided. Even when the needle moves in parallel with the warp for a predetermined distance, it is possible to prevent the contact and collision between the tuck-in needle and other components, and prevent the tuck-in needle from being damaged.

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

Reference numeral 1 denotes a gear box which forms the main body of the selvedge device, and the rotation of the main shaft of the loom is transmitted to the input shaft 4 via the toothed belt 2 and the toothed pulley 3, and the rotation is internally converted into various movements. The gear box 1 is fixed via a mounting base 5. 6 is a warp yarn, 7 is a cloth fell, and 8 is a cloth fell holding plate.

Reference numeral 10 denotes a tuck-in needle, which is a tip of an arm 13 which is secured by a bolt 12 to one end of an operating rod 11 which protrudes from the rear surface of the gear box 1 and swings back and forth while moving back and forth in the axial direction. It is fixed to the part by bolts 14. Then, it is curved as a whole and has a hook portion 10a at the tip thereof, and catches the end portion of the beated and cut weft yarn and inserts it into the next warp yarn opening.

Here, the other end of the actuating rod 11 to which the tuck-in needle 10 is attached projects from the front surface of the gear box 1, and a locking piece 72 is fixed to the gear box 1 by a bolt 71. The locking piece 72 corresponds to a member that swings together with the tuck-in needle 10. Then, in order to restrict the swing of the tuck-in needle 10 to the side of the thread retainer 20 described later, the locking piece 72
A stopper 74 is fixed to the front surface of the gear box 1 by a bolt 73 so as to be opposed to the movement locus. This stopper 74
There are formed two steps of stopper surfaces 74a and 74b (see FIGS. 3 and 4).

Reference numeral 20 denotes an air nozzle type yarn retainer that pulls and holds the end portion of the weft yarn in a tensioned state until it is caught by the tuck-in needle 10, and L fixed by a bolt 24 to a bracket 23 fixed to a lever 21 described later by a bolt 22. V-shaped hollow member
25 and a pipe-shaped air nozzle 26 protruding downward from the tip of the hollow member 25, and a notch 27 formed in the peripheral surface on the rear side of the air nozzle 26 and a cutter described later. 30
It is located substantially on the warp line behind the cloth fell 7 between and. Then, a flexible pressure air supply pipe 28 from a pressure air supply source (not shown) is connected to the hollow member 25 to generate a downward traction air flow in the air nozzle 26.

Reference numeral 30 is a scissor type cutter, which is composed of a fixed blade 31 and a movable blade 32, and cuts the end portion of the beaten weft thread. 31a is a tip of the fixed blade 31, and 32a is a tip of the movable blade 32.

Here, the fixed blade 31 is fixed to the side surface of the cutter support 33. The cutter support 33 has a fitting portion 34, and the fitting portion 34 is slidably fitted in a dovetail groove 36 formed on the rear surface of the bracket 35, and is fixed by a bolt 37. The insertion hole for the bolt 37 is a long hole 38, which allows the mounting position of the cutter support 33 to be adjusted with respect to the bracket 35 in the width direction of the loom. Further, the bracket 35 is fixed to the side surface of the gear box 1 by a bolt 39, and the insertion hole of the bolt 39 is also a long hole 40, whereby the mounting position of the cutter support 33 together with the bracket 35 is adjusted in the longitudinal direction of the loom. It is possible.

The movable blade 32 is rotatably supported in the cutter support 33, and is attached to the end of a shaft 41 that penetrates through the fixed portion of the fixed blade 31 and projects. Then, one end of the adjusting rod 44 is rotatably fitted to the boss 43 fixed to the arm portion 42 integrated with the movable blade 32, and is prevented from coming off by the washer 45 and the nut 46. The threaded portion 44a at the other end of the adjusting rod 44 is screwed into one end of the link 47 and is retained by the lock nut 48. The other end of the link 47 is pivotally attached to a pin 50 protruding from a lever 49 described later.

Reference numeral 52 denotes a weft guide, which is fixed to the cutter support body 33 so as to be positioned side by side with the cutter 30 and on the side opposite to the weave, and has an inclined guide portion 52a and a locking recess 52b at its upper edge. During the beating process, the weft thread guided along the inclined guide portion 52a is locked in the locking recess 52b and is positioned in the notch 27 and the opening of the cutter 30 which are the air flow operating area of the thread holder 20.

The levers 21 and 49 are rotatably attached to a common fixed shaft 54 protruding from the bracket 35. Then, these levers 21 and 49 are biased by springs 55 and 56, respectively,
The cam followers 57, 58 mounted in the middle are brought into contact with the cams 61, 62 mounted on the rotating shaft 60 protruding from the gear box 1 and rotating.

Next, the operation will be described. Incidentally, FIG. 5 shows the movement locus of the tuck-in needle 10, and FIG. 6 shows the tuck-in needle.
10, the operation timings of the yarn holder 20, the cutter 30, and the like are shown.

When the weft is beaten by the reed advance after the weft is inserted, the weft moves along the inclined guide portion 52a at the portion of the weft guide 52 and finally enters the locking recess 52b to be locked, and the reed is It is held in this position even when it moves backward. In this state, the weft thread stretched between the weft and the weft thread guide 52 is not
Air nozzle 26 of the thread retainer 20 located in the opening of 30
It is located in the notch 27.

Immediately after the beating, the lever 62 and the link 47 are connected by the cam 62.
The movable blade 32 of the cutter 30 is driven via the adjustment rod 44 and the like, and the weft yarn is cut in cooperation with the fixed blade 31.

At this time, since the weft yarn between the weaving selvage and the cutter 30 is already located in the notch 27 which is the air flow action area of the yarn holder 20, when the weft yarn is cut by the cutter 30, it is cut. The weft end portion on the weave side is notched by the action of the air jet in the air nozzle 26 and the suction airflow generated around it.
It is sucked from 27 into the air nozzle 26 and pulled and held by the air flow. This pulling and holding state continues until the weft yarn is delivered to the tuck-in needle 10 after the next weft insertion, but since it is pulled and held by the air flow, slack does not occur.

Next, the next weft is inserted and the beating process continues,
During that time, the tuck-in needle 10 first moves toward the rear of the loom (first
2) and then swings counterclockwise in FIG. 2, the upper side warp yarns 6 are scraped into the opening in the middle of the swinging, and then the warp yarns 6 are out of the row 6 as they are. At this time, the locking piece 72 attached to the operating rod 11 contacts the stopper surface 74a of the stopper 74, and the overrun of the tuck-in needle 10 is prevented. The stopper surface 74a is mainly used for the thread retainer 2
This is to avoid a collision with zero.

After that, the tuck-in needle 10 moves to the front of the loom (to the right in FIG. 1) and passes under the weft yarn end portion stretched between the weave and the yarn holder 20.

Thereafter, the tuck-in needle 10 further swings counterclockwise in FIG. At this time, the locking piece 72 contacts the stopper surface 74b of the stopper 74 to prevent the tuck-in needle 10 from overrunning. The stopper surface 74b is mainly for avoiding a collision with the cutter 30.

After that, the tuck-in needle 10 starts swinging in the opposite direction, that is, clockwise in FIG. 2, and at this time, the lever 21 is driven counterclockwise in FIG. 1 by the cam 61 and attached thereto. The yarn retainer 20 moves substantially downward, and the weft end portion stretched between the selvage and the yarn retainer 20 is pressed toward the tuck-in needle 10 side. As a result, when the tuck-in needle 10 rotates in the opposite direction, the weft is reliably caught by the hook portion 10a and captured, and the tack-in needle 10 returns to the inside of the warp opening in the hooked state, so that the weft end is It is folded back and inserted into the warp shed which is in the opposite phase to the part already woven as a woven fabric. Then, the tuck-in needle 10 separates the upper warp yarn 6 from the warp yarn shedding and ejects it, and then also escapes from the repulsion route of the reed.

Then, when the weft thread inserted by the forward movement of the reed is beaten, the weft ends, which are folded back and inserted into the warp shed as described above, are beaten at the same time at the tuck-in portion, and the tuck-in is performed. Ears are formed.

The stopper 74 and the like may be arranged in the gear box 1. Further, a stopper may be provided for the arm 13. Further, a cushioning material may be attached to the stopper to reduce tapping noise and the like.

Further, in this embodiment, the tack-in selvage device on the weft insertion side is shown, but it goes without saying that the tack-in selvage device for the anti-weft insertion side or the middle ear can also be configured in the same manner.

<Advantages of Device> As described above, according to the present invention, the tuck-in needle is provided with a fixed stopper that regulates the swinging of the tuck-in needle toward the yarn retainer side, so that the tuck-in needle moves in parallel with the warp for a predetermined distance. There is an effect that it is possible to reliably prevent damage to the tuck-in needle due to contact or collision between the tuck-in needle and other components, including when the tuck-in needle moves.

[Brief description of drawings]

FIG. 1 is a side view of a tuck-in selvage device showing an embodiment of the present invention, FIG. 2 is a front view seen from the rear of the loom, FIG. 3 is a rear view seen from the front of the loom, and FIG. FIG. 5 is a plan view of the stopper as viewed in the direction of arrow IV in FIG. 5, FIG. 5 is a schematic plan view showing the movement locus of the tuck-in needle, and FIG. 6 is a diagram showing the operation timing of the tuck-in needle. 1 ... Gear box, 10 ... Tuck-in needle, 11 ...
… Actuating rod, 13 …… Arm, 20 …… Air nozzle type thread retainer, 30 …… Cutter, 52 …… Weft guide, 72 …… Locking piece, 74 …… Stopper

Claims (1)

[Scope of utility model registration request] 1. A tuck-in needle (10) for catching the beated end of the weft, swinging it back and inserting it into the next warp opening, and holding the weft end until it is caught by this needle. It is equipped with a thread retainer (20) and has a tuck-in needle.
In the tuck-in selvedge device of the fragment loom, the tip of (10) advances from the warp opening to the thread retainer (20) side, moves in parallel with the back warp, and then further advances to the thread retainer (20) side. Constantly restricts the swing of the tuck-in needle (10) toward the yarn retainer (20) side relative to the member (72) swinging together with the needle (10) over a predetermined length that moves in parallel with the warp yarn. A tuck-in selvage device for a fragment loom, which is provided with a fixed stopper (74).