JPH0318536Y2 - - Google Patents

Description

[Detailed description of the invention] <<Industrial application>> This invention is a device for removing incomplete weft threads in shuttleless looms, more specifically, a device for removing threads that are incompletely inserted in a shuttleless loom. The present invention relates to a device for removing incompletely inserted weft yarns (referred to as "missed weft yarns") in the warp shedding prior to automatically restarting a loom that has been suspended.

<Prior art and its problems> When the weft insertion is incomplete, the loom automatically stops in the next cycle after receiving a detection signal indicating the incomplete weft insertion state, and then returns to a predetermined crank angle. The loom is reversed and stopped, and the loom is restarted after the erroneous weft is removed.

For example, this misplaced weft removal device is
A device such as that seen in Japanese Patent No. 59-21757 has been proposed. The device disclosed in this publication uses a jet of air to guide the weft to a waist roller, which is the main removal device, and removes the missed weft from the shed while winding up the weft by the rotation of the waist roller.

However, with this device, it is difficult to reliably guide the misplaced weft yarns to the waist roller with a jet of air, and it is not possible to reliably remove the misplaced weft yarns. Another disadvantage is that it is difficult to automatically discharge the weft yarn after winding, and the weft yarn is also drawn out from the main nozzle side, resulting in wasted weft yarn.

In another embodiment, a pair of rollers is provided between the main nozzle and the woven fabric, and when a defective weft is wound up, one of the rollers moves to guide the weft before winding it. . However, it is difficult to install such a device between the main nozzle and the woven fabric in terms of space, and this device also obstructs the weft insertion and adversely affects weft insertion.

《Purpose of the invention》 This invention was proposed in view of the above-mentioned drawbacks of the conventional device.It is possible to reliably remove erroneous weft threads, and the weft threads are not wasted during this removal. To provide an incompletely inserted yarn removing device for a shuttleless loom that can be placed in a place that does not adversely affect insertion.

<Basic structure of the invention> For this reason, in this invention, a piston mechanism that is rotationally driven in the horizontal direction is installed on the actuator, and the horizontal rod of this piston mechanism supports the weft winding member that grips the missed weft. , the weft thread cutting mechanism supported by the rod is positioned upstream of the weft thread attaching member in the weft insertion direction, and the weft thread winding member is rotated about its axis to wind the missed weft thread around it. A misplaced weft removing mechanism is connected to a shaft rotation drive mechanism, and includes a thread removal bar supported by the rod and moved forward and backward relative to the weft winding member to forcibly push out misplaced wefts wound thereon. The gist of this document is that it has been established.

<<Example>> An example of this invention will be described below based on the attached drawings.

In addition, in the following description, the winding side of the loom is the front side, the warp sending side is the rear side, and the main nozzle side is the left side.
The side opposite to yarn feeding is called the right side.

As shown in FIG. 1 and FIG. 3A, a rotary shaft is installed at a predetermined position in front of the virtual weft flight line connecting the main nozzle N and the weaving front to rotate the rotating shaft 2 in the horizontal direction at a predetermined timing. An actuator 1 is provided. An air cylinder 3 is provided on the rotating shaft 2 of the rotary actuator 1, and the air cylinder 3 is designed to move from a standby position at a predetermined timing to a weft yarn connected between the main nozzle N and the fabric front. A piston rod 5 that moves forward is attached. A housing 7 is connected to the tip of the piston rod 5 in which a winding and cutting mechanism 100 such as weft gripping and winding members 15a and 15b and a cutter 30, which will be described later, is housed and attached thereto.

As will be described later, the rotary actuator 1 rotates in the anti-weft insertion direction when pulling out the misplaced weft caught by the weft gripping and winding member 15 from the front of the fabric.

Next, the winding and cutting mechanism 100 accommodated (attached) in the housing 7 will be explained.

A motor shaft 11 extending in the axial direction of the piston rod 5 is provided on the upper surface side of the housing 7.
As shown in FIG. 2, a case member accommodating a solenoid 13 that causes the weft gripping winding members 15a and 15b to grip the weft W is provided at the tip of the motor shaft 11. 14 is attached. The rotation of the motor 9 causes the weft gripping and winding member 15 connected to the motor 9 through the case member 14 to rotate, and the missed weft gripped by the weft gripping and winding member 15 is wound around it.

The solenoid 13 has a rod 17, which rotatably connects the weft gripping and wrapping members 15a and 15b. When the rod 17 moves back due to the operation of the solenoid 13, the weft gripping and wrapping members 15a, 15b are pins 16a and 16b, respectively.
It rotates using the fulcrum as a fulcrum and grips the weft. The weft gripping and winding members 15a and 15b both have forked tip ends.

Between the pair of leg parts 15a ₁ , 15a 2 and 15b ₁ , 15b ₂ of the weft gripping and wrapping members 15a and _15b , there is provided a weft yarn wound around the weft gripping and wrapping member 15, which will be described later, at a predetermined timing. A winding yarn removal bar 19 is provided, and this winding yarn removal bar 19 is connected to a solenoid 21, and moves forward toward the tip of the leg at a predetermined timing, and then It is set to return and retreat at a predetermined timing.

A concave guide portion 24 through which the missed weft W can pass is formed at the tip of the housing 7, and the misplaced weft W passes through the weft gripping and winding member 15.
A sensor 25 is provided to detect that the device is located (exist) in a grippable state.

A cutter 30 is provided on the side surface of the housing 7 on the main nozzle side to cut off the missed weft threads connected to the woven fabric from the main nozzle N at a predetermined timing. This cutter 30 is operated by a solenoid 28, for example.

《Effect of invention》 Next, the operation of this invention will be explained.

When a filler (not shown) detects a weft insertion error and outputs a loom stop signal, the cutter that cuts the weft threads connected to the edge of the woven fabric from the main nozzle N becomes inactive, and a weft storage device (not shown) causes the next weft thread to be cut. Weft insertion is prevented and the stopped loom is reversed to a predetermined crank angle to bring it into an open state. At this time, the winding and cutting mechanism 100 is in the standby position shown in FIG. 3A.

Thereafter, as shown in FIG. 3B, the cylinder 6 is operated to advance the weft gripping and wrapping member 15 of the winding and cutting mechanism 100 to a position where it can grip the missed weft W, and the guide section 24 The sensor 25 detects whether the weft gripping and wrapping member 15 is in a proper position to grip the missed weft W, and after confirming that the weft gripping and wrapping member 15 is in a grippable position, the solenoid 13 is activated; The rod 17 moves back and the missed weft W is gripped by the upper and lower leg members 15a, 15b as shown in FIG. 3C.

In the above description, the sensor 25 is provided in the housing 7, but the sensor 25 may be used as long as it confirms whether or not the weft gripping and winding member 15 is in the proper position to grip the missed weft. It is not necessary to provide it in the housing 7 as illustrated, and it may be provided directly on the weft gripping and winding member 15. In short, it is only necessary to have each subsequent operation described later performed when it is confirmed that the missed weft is gripped by the weft gripping and winding member 15.

Next, as shown in FIG. 3D, the gripping and cutting mechanism 10
0 is activated to cut the missed weft W on the main nozzle side, and while holding the missed weft W, the rotary actuator 1 is rotated a predetermined amount counterclockwise in the figure to cut the missed weft W as the main nozzle. Pull it toward the nozzle N side. With this action,
The misplaced weft W is pulled out from the front, especially near the yarn feeding side. After that, the take-up motor 9 is operated and the third winding motor 9 is operated.
As shown in Figure E, the missed weft W is pulled out from the shed while being wound around the gripping and winding member.

Then, the rotary actuator 1 is further rotated counterclockwise in the figure while the air cylinder 3 is operated in reverse to move the piston rod 5 backward, and the gripping and winding member is moved to the miss weft discharge position shown in FIG. 3F. come. At this position, the excitation to the solenoid 13 is slightly weakened, and the solenoid 21 is further actuated to move the wound yarn removal bar 19 forward, pushing out the misplaced weft wound around the gripping and winding member. The misplaced weft yarns wound between 15a ₁ , 15a ₂ and 15a ₂ , 15b ₂ are pushed out and discharged. In this case, the third
As shown in FIG. F, if the suction pipe 40 is opened near the discharge position, the misplaced weft pushed out from the gripping and winding member 15 will be discharged out of the system along with the suction air current.

After completing these operations, each mechanism is brought to its standby position, and the loom is restarted.

<<Effects of the invention>> Since the incomplete weft insertion yarn removal device of the shuttleless loom of this invention is in the standby position during steady operation, it does not become an obstacle to weft insertion during steady operation.

In addition, when a defective weft insertion occurs, the system moves forward to the working position and grasps the misplaced weft, and then pulls the misplaced weft in the direction opposite to weft insertion. Picking can be carried out smoothly, and since the missed weft is wound up after cutting the weft on the upstream side in the weft insertion direction, the weft for the next pick is not pulled out from the main nozzle during winding, and the weft is not wasted. disappears.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the surroundings of the incomplete weft insertion removal device of the shuttleless loom of this invention, Fig. 2 is a partial explanatory view thereof, and Figs. 3 A to F show the operating state of the device of this invention. It is an explanatory diagram. 1... Rotary actuator, 3... Air cylinder, 5... Piston rod, 7... Housing, 9... Winding motor, 13, 21, 28
...Solenoid, 15...Gripping and wrapping member, 1
7... Rod, 19... Winding thread removal bar, 30
...Cutter.

Claims (1)

[Claims for Utility Model Registration] A piston mechanism installed on an actuator and driven to rotate in a horizontal direction; a weft winding member supported by a horizontal rod of the piston mechanism to grip a missed weft; and a weft winding member supported by the rod. a weft cutting mechanism located upstream in the weft insertion direction with respect to the weft winding member; and a shaft connected to the weft winding member to rotate the weft winding member and wind the missed weft around it. a rotational drive mechanism; and a misplaced weft removal mechanism, which is supported by the rod and includes a yarn removal bar that moves forward and backward relative to the weft winding member and forcibly pushes out the misplaced weft wound around the weft winding member. A device for removing incomplete weft insertion for a shuttleless loom, which is characterized by: