JPH0711188Y2 - Tuck-in device for pile loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an improvement in a tuck-in device for a cloth moving type pile loom.

[Conventional technology]

With a cloth-moving pile loom, the loose cloth picks move the cloth fell from the reed line to the winding side. When the tuck-in device is applied to such a cloth moving type pile loom, when the cloth fell is displaced to the winding side in the loose pick, the position of the end of the weft is also displaced, so that the yarn end is not properly gripped or the needle is engaged. Tack-in operation becomes unstable due to improper stoppage, and malfunctions are likely to occur.

Therefore, the invention of Japanese Patent Laid-Open No. 60-9950 is that a guide (device for fixing the top line of the shed) is fixed on the beating line and at the end of the woven fabric, and the shed is spread across the warp yarn width where the tuck-in operation is performed. Regulates the displacement of.

[Problems of conventional technology]

However, when using selvage yarns that have an opening pattern that is open even when closing the ground warp threads and pile warp threads,
For example, when using the ear thread of the tissue (3/3) that performs the opening / closing operation once in the first pick cycle and keeps the maximum open state for the subsequent two loose pick cycles, loose pick Although the top of the selvage yarn opening is located closer to the winding side than the reed line, the top of the selvage yarn is regulated on the reed line by the guide, so the tension of the selvage yarn is high. When beaten at this time, the tension of the selvage yarn becomes excessively large, and selvage yarn breakage easily occurs. The opening pattern, which is opened even when the warp thread is closed, is adopted to suppress the thickness of the woven fabric edge, and the number of selvage yarn crossings is set to be smaller than the number of woven fabric side warp yarn crossings. Therefore,
In this case, the selvage yarn is open even when the warp yarn is closed.

[Purpose of device]

Therefore, the object of the present invention is to stabilize the tuck-in operation and prevent selvage yarn breakage during beating, and there is a relation of improvement of the invention of the above-mentioned JP-A-60-9950.

[Means for solving the invention]

In order to achieve the above object, the present invention provides an ear thread guide that regulates the top position of the opening of the selvage thread, and this ear thread guide is provided at a position on the reed line and a retracted position on the winding side of the reed line. The guide driving means is used to move between them.

[Function of device]

The guide driving means retracts the selvage yarn guide to the winding side with respect to the beating line at least during beating of the loose pick,
Decrease the tension of the open selvage. As a result, the tuck-in operation is stabilized, and the selvage yarn breakage during beating can be reliably prevented.

〔Example〕

This embodiment is a cloth moving type pile loom that performs a fast pick after two loose picks, and performs one opening / closing operation at the time of the first pick, and then performs the opening operation in two loose picks. Organization (3 /
3) Using the selvage yarn, position the selvage yarn guide on the beating line during the period of substantial tuck-in motion (crank angle of the loom 90 ° to 270 °), and at other periods, toward the beating time. This is an example of retracting each pick.

1 to 4 show a tuck-in device 1 of this embodiment.
Shows a schematic configuration of.

The tuck-in device 1 is assembled by a needle 2, a gripper 3, a cutter 4 and an ear thread guide 5.

The needle 2 has an L-shape, is arranged from the central portion of the pile cloth 6 toward the weave end portion, and has a needle holder 7 and a horizontal needle shaft 8.
Thus, the needle shaft 8 can be moved forward and backward with respect to the box 9 in the axial direction, and is supported in a swingable state around the axial line. Further, the gripper 3 is a pile cloth 6
Is assembled by the body 110 at the weave end portion of the body, is supported by the horizontal gripper shaft 11 so as to be movable back and forth in the axial direction with respect to the box 9, and is perpendicular to the body 10, and the gripping piece 14 and the body 10 at the lower end of the slider 12 are arranged. The weft thread 15 can be grasped at the lower end portion. The slider 12 is vertically movable with respect to the body 10 and is urged upward by a coil spring 13 via a large diameter portion, and the upper portion thereof corresponds to an engaging piece 16 attached to the needle holder 7. However, it is adapted to interlock with the swinging motion of the needle 2.

The selvage yarn guide 5 is supported by the slide shaft 17 at the weave end portion of the pile cloth 6 so as to be able to move forward and backward by the boss inside the box 9 and the hole for sliding guide, and at the position a on the beating line and its position. The position b on the take-up side is moved by reciprocating motion at the timing shown in FIG. 5 with respect to the crank angle of the loom. The tip of the selvage yarn guide 5 is U-shaped, and the selvage yarn 27 and the catching yarn 28 are included in the tip.

The drive means 18 for the slide shaft 17 is driven by a cam mechanism as shown in FIG. That is, the rotation of the cam shaft 19 causes the plate cam 20 to swing the substantially L-shaped lever 22 about the shaft 23 through the cam ball 21 and move the slide piece 24 forward and backward, thereby resisting the compression spring 25. Then slide shaft 17 into box 9
To move forward or backward inside. As a result, the selvage yarn guide 5 is located at the position b near 0 ° (360 °) with respect to the crank angle of the loom, as shown in FIG.
The position a is set up to 70 °. The position a is a position on the beating line, and the position b is at least matched with the cloth fell position at the loose pick time or is set at a position closer to the winding side. In this embodiment, a deformed reed is used as the reed 26, so the position b is set at a position where it does not interfere with the upper jaw of the reed 26. The moving distance L of the selvage yarn guide 5 is set larger than the depth of the upper jaw. The cutter 4 is installed at a position farther from the end of the pile cloth 6 than the gripper 3,
Moves back and forth at a predetermined timing, and weft at the cutting timing
Cut 15

As shown in FIG. 1, when the engagement piece 16 engages with the slider 12, the gripping piece 14 is pushed down against the coil spring 13 and forms an opening with the lower end surface of the bobbin 10. The reciprocating operation of the needle 2, the gripper 3, the cutter 4 and the like is performed by the driving means such as a cam mechanism (not shown) incorporated in the box 9 under the operation timing of FIG.

The tuck-in device 1 operates as follows.

At a crank angle of 0 ° during beating, the needle 2, gripper 3 and cutter 4 are in the retracted position. The needle 2, gripper 3 and cutter 4 start to move forward at a crank angle of about 10 °. At this time, the gripper 3 moves forward while opening by the engagement piece 16 and the slider 12 engaging with each other. In the middle of this forward movement, for example, near a crank angle of 80 °,
Since the needle shaft 8 starts rotating to the left, the above engagement is released, the gripper 3 is closed, and the end portion of the weft thread 15 wefted in the previous cycle is cranked at a crank angle of 90.
Hold near. After the cutter 4 has completed the forward movement over the beating line, the tip of the weft thread 15 gripped by the gripper 3 is cut at a crank angle of about 120 °. When the gripper 3 reaches the most forward position, that is, when the crank angle is close to 120 °,
The end of the weft thread 15 is stretched between the catching thread 28 and the gripper 3 in a stretched state. The tip of the needle 2 moves into the lower part of the weft thread 15 at a crank angle of about 160 ° by rotating while moving forward. This state is shown in FIG. After that, the needle 2 moves from the crank angle of 160 ° to 2
Between 10 °, the weft thread 15 is slightly retracted, further starts rotating to the right, and is retracted while locking the weft thread 15
While pulling the end portion of the warp yarn into the opening of the warp yarn 29, it escapes from the warp yarn 29 at a crank angle of 240 ° to 270 °. The needle 2, the gripper 3, and the cutter 4 move to the retracted position again at a predetermined timing before beating, in order to avoid interference with the reed 26.

Next, FIG. 7 shows the relationship between the open state of the selvage yarn 27 and the warp yarn 29 and the movement of the cloth fell (movement of the tension roll).
The movement situation of the selvage guide 5 is shown.

Before weaving in the first loose pick, it matches the reed point, but in the second loose pick, move a predetermined amount in the winding direction and beat at the reed point. Thus, in the next first pick, the warp yarns 29 corresponding to the movement amount are formed in a pile shape. In this way, 2 loose picks and 1 first pick
Complete the repeating cycle.

Then, the selvage yarn 27 reaches the maximum opening at the crank angle of 180 ° in the first loose pick cycle,
After the second loose pick cycle, the opening state is maintained as it is up to 180 ° in the first pick cycle.
During this time, the selvage yarn guide 5 is in the position b at the time of beating, as shown in FIGS. 7 and 8, and moves to the position a during the tuck-in operation period, for example, at the crank angle of 90 ° to 270 °. There is. As a result, when the top of the opening of the selvage yarn 27 performs a stable tack-in operation during the tack-in operation period of the second loose pick and the first pick, the selvage yarn guide 5 is
Although it is at the position a, regardless of the position of the selvage yarn guide 5, the top part is still located on the beating line by the tension roll.

Also, at the time of beating the first and second loose picks, the top part retreats to a position closer to the winding side than the beating line, and the selvage tension level becomes lower accordingly.
Ear thread breakage does not occur during beating. Figure 9 shows
The change in selvage yarn tension is shown in the order of the first pick, the second pick, and the first pick. In the case of this tuck-in device 1, the selvage yarn tension is suppressed to be lower than the conventional one by ΔT.

[Other Examples]

In the above embodiment, the selvage yarn guide 5 is moved in each cycle in order to avoid interference with the deformable reed 26, but when there is no fear of interference, for example, when using a flat reed 26 You may make it retreat to the position b at least at the time of hitting each loose pick. Further, the driving means of the selvage yarn guide 5 may be constituted by an electric driving means such as a solenoid instead of the cam mechanism.

Note that, as an application example of the movement of the selvage yarn guide 5, the following settings can be supported. That is, after the tack-in operation in the loose pick, the crank angle is 240 ° to 270
The selvage yarn guide 5 is moved from the position a to a predetermined amount in the vicinity of the angle a, and then the position b is suddenly moved to the reed side by a predetermined amount.
Retreat to. This allows the weft thread to be tucked in.
Since the tip of the yarn 15 is captured by the selvage yarn 27, it is possible to prevent the end portion of the yarn from sticking in between and causing an ear defect.

[Effect of device]

In the present invention, the selvage yarn guide is moved to the retracted position on the winding side with respect to the beating line at least during beating of the loose pick to reduce the tension of the selvage yarn. The thread tension does not become excessive, and this prevents selvage thread slippage, and the top of the selvage thread opening is always in a fixed position during tuck-in operation, so there is no gripping or drawing failure and the tuck-in operation is stable. To be done.

[Brief description of drawings]

FIG. 1 is a side view of the tuck-in device, FIG. 2 is a front view of the tuck-in device, FIG. 3 is a plan view of a main portion of the device, FIG. 4 is a side view of driving means of the selvage yarn guide, and FIG. Is a time chart diagram of the movement portion of the selvage yarn guide with respect to the crank angle, FIG. 6 is an operation time chart diagram of the cutter, gripper and needle, FIG. 7 is an operation explanatory diagram, and FIGS. 8A and 8B are positions of the selvage yarn guide. FIG. 9 is an explanatory view of the state of warp yarns, and FIG. 9 is a graph of changes in selvage yarn tension at each weft insertion. 1 ... Tuck-in device, 2 ... Needle, 3 ... Gripper, 4 ... Cutter, 5 ... Ear thread guide, 6 ... Pile cloth, 14 ... Gripping piece, 18 ... Driving means, 26 ... Reed .

Claims (1)

[Scope of utility model registration request] 1. In a cloth moving type pile loom, an selvage yarn having an opening pattern which is opened even when the warp yarn is closed, an selvage yarn guide for regulating a top position of the selvage yarn opening, and the selvage yarn guide. Has a guide driving means for moving at least between the position on the beating line and the retracted position on the winding side of the beating line, and moves the selvage yarn guide to the retracted position at least during beating of the loose pick. A tuck-in device for a pile loom, which is characterized in that