JPS6228446A - Mistake yarn removing apparatus in jet 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 [Field of Industrial Application] The present invention relates to a device for removing misplaced threads when a shuttleless loom, more particularly an air jet loom or a water jet loom, is stopped.

[Conventional technology]

In order to speed up the weaving operation, an air jet loom or a water jet loom is used in which measured weft yarns are formed between upper and lower warp yarns and inserted into a shed by a jet nozzle. In such high-speed looms, the weaving speed is high, so the impact of stopping the loom on productivity decreases is 41! ! more significant. Therefore, it is desirable that the stoppage time in the jet room be as short as possible. On the other hand, in jet looms, unlike conventional diameter ams, the wefts are made to fly through the shed by air or fluid such as water without using a shuttle, so weft insertion errors are more likely to occur than in frame looms. . That is, the weft may not be supplied from the jet nozzle, a so-called weft supply error, or the weft may be supplied from the jet nozzle, but may not reach the selvage yarn on the opposite side of the jet nozzle, a so-called conveyance error. .

In addition, in jet looms that operate at high speeds, even if the loom is stopped immediately after a weft insertion error is discovered, in order to prevent parts of the loom from being damaged due to excessive deceleration, The timing is selected so that after an insertion error is detected, the machine will stop after about one cycle of inertia operation.

Therefore, conventionally, when the jet loom is stopped due to a weft insertion error signal, the next weft insertion cycle is performed before the jet loom stops. Therefore, it is necessary to reverse the machine and remove not only the weft yarn in which the weft insertion error occurred, but also the weft yarns inserted in the cycle after the weft insertion error. By the way, the weft inserted immediately after a weft insertion error is beaten like a normal weft and is firmly held in the woven fabric, so it cannot be easily removed and the removal work is extremely troublesome.

Also, warp threads (including selvedge threads) may be cut during weaving work,
When the loom is switched off by human operation,
For the same reason as mentioned above, the loom stops after operating for about one cycle due to inertia. If an attempt is made to remove the weft inserted during this inertial movement in order to prevent defects such as weaving steps from occurring in the woven fabric, it is not easy to remove it for the same reasons as mentioned above.

Japanese Patent Application Laid-open No. 58-197339 discloses that when a weft insertion error occurs,
Repairs of the fluid jet loom when the warp breaks or when the machine stops due to manual operation can be easily performed without requiring any skill. etc.), in a fluid jet loom where the measured weft is inserted into a shed formed between the upper and lower warp yarns using a jet nozzle, when a stop signal of the loom is detected, the length of the weft is inserted into the shed formed between the upper and lower warp yarns. fluid jetting that brakes the machine while preventing weft insertion between the gaps, and then reverses the machine to a state where the weft that caused the stop signal to be issued can be processed without supplying the weft to the shed; A weft processing method in a type f1 machine is disclosed.

As an apparatus most suitable for carrying out the above-mentioned weft processing method, Japanese Patent Application Laid-Open No. 59-21757 discloses that the weft is inserted into a shed formed between the upper and lower warps using a pressure fluid sprayed from a jet nozzle. In the weft inserting device of a fluid jet loom, a suction pipe is installed so that the tip of the suction port is located near the weft path between the jet nozzle and the jet nozzle side selvedge yarn, and the suction pipe also runs along the weft path. It is disclosed that a pair of rollers is provided in front of the suction pipe as a means for guiding the weft yarn to the suction pipe.

[Problem that the invention seeks to solve]

In the above-mentioned Japanese Patent Application Laid-Open No. 59-21757, a roller is provided at the entrance of the suction pipe, but the position of the thread is not stable at the entrance of the suction pipe, and the reliability of thread gripping is not high. Therefore, a situation arises in which the thread cannot be gripped by the rollers and the thread is sucked only by the suction nozzle, and the suction force of the suction pipe may be insufficient. Also,
In the suction pipe disclosed in Japanese Unexamined Patent Publication No. 59-21757, in order to compensate for the lack of suction force and ensure that the weft is suctioned by the suction pipe, the suction pipe is movable forward and backward with respect to the weft path, and the suction pipe is moved back and forth with respect to the weft path, and the suction pipe is moved back and forth when suctioning the weft. The tip of the pipe is made to be sufficiently close to the weft. However, such a movable installation increases the size of the equipment, and it may be difficult to actually install it due to the installation space and the like.

An object of the present invention is to provide a device that can reliably remove a misplaced weft when the jet loom stops as described above.

[Means for solving problems]

In the present invention, the tip of a missed weft suction pipe is open at the outlet end of a main jet nozzle that inserts the weft into a shed, and at least a pair of pull-out rollers are disposed in the suction pipe so as to be able to approach and separate. The above objectives are achieved by means of a mis-thread removal device in the jet loom.

[Effect]

In the present invention, a pair of pull-out rollers are provided in the suction pipe, and the pull-out rollers reliably grip and transport the weft suctioned by the suction pipe, so that the weft can be reliably removed. In addition, since the pull-out roller is configured to be able to approach and separate, the pull-out roller is opened at the start of suction and the weft is introduced between the pull-out rollers, and then the weft can be reliably gripped by pressing both pull-out rollers together.

〔Example〕

The present invention will be described in detail below with reference to the accompanying drawings. The drive system of the air jet room according to the present invention has the same structure as the conventional device.

When carrying out the present invention, as a weft storage device, a length measuring storage mechanism that combines a feed roller and a pool pipe disclosed in JP-A No. 59-21752, or a length-measuring storage mechanism disclosed in JP-A-57-16946, for example, may be used. Publications and Japanese Patent Application Laid-open No. 56-58028
Wrapping the weft around the circumferential surface of the measuring drum disclosed in the publication,
Unraveling from the measuring drum! A length measurement storage mechanism that is controlled by i can be used.

In FIG. 4, a gripper (not shown) is provided between the weft storage device [(not shown) and the main air jet nozzle 22 to control the supply of weft from the weft storage device to the main air jet nozzle 22. There is. The main air jet nozzle 22 injects compressed air in synchronization with the rotation of a crankshaft (not shown), inserts the weft yarn into a shed formed between the upper and lower warp yarns 38, and beats the weft yarn with a reed 44. .

A photoelectric type that detects whether or not the weft yarn is reliably inserted near the selvage yarn on the opposite side of the main air jet nozzle 22;
A detector 34 of an appropriate type, such as a mechanical type or a fluid type, is provided to detect whether the weft yarn is being reliably supplied from the main air jet nozzle 22, for example, in accordance with the method described in Japanese Patent Publication No. 54-21475.

A known ejector type suction nozzle 39 is provided between the main air jet nozzle 22 and the selvage thread, which generates a suction force by the action of compressed air. A suction pipe 5 is connected to the suction nozzle 39, and the suction pipe 5 is disposed inside the suction nozzle 6. A pair of pull-out rollers 2.3 are provided between the suction pipe 5 and the suction nozzle 6.

As shown in FIGS. 1 and 2, the roller 2 is connected to a drive motor 1 and is driven and rotated in a fixed position. The roller 3 is a pressure roller whose surface is made of rubber, and the support shaft 3a of the roller 3 is connected to the elongated hole 9b of the U-shaped bracket 9.
Supported by

Hole 9a of bracket 9 and hole 1 of 1-shaped arm 13
A bolt 15 is inserted into 3b and fastened with a nut. A head 17 is fixed to a piston rod 4a of an air cylinder 4 with a nut 2o. The head 17 and the arm 13 are connected by a bolt 18 and a nut 19. Therefore, the roller 3 can be moved forward and backward relative to the drive roller 2 by the air cylinder 4.

Further, the support shaft 3a of the roller 3 is connected to a hole 8 of a slider 8 that is movable along a guide rail formed in the guide rail member 21.
It is supported by a. The guide rail member 21 is the roller 2
The support shaft 2a is rotatably supported. Also, arm 1
A push bolt 10 is fixed to the hole 13a of No. 3 with a nut 14, and a compression spring 12 is installed between the push bolt 10 and the slider 8. Therefore, even after the roller 3 contacts the roller 2, when pressed by the air cylinder 4, the compression spring 12 is bent, and the roller 3 is pressed against the roller 2.

In FIG. 4, a shutter 37 is located near the tip of the weft nozzle 39 and is rotatable between a position away from the weft path and a position intersecting the weft path. Note that the shutter 37 is not limited to one that rotates in the vertical direction;
It may also move in the longitudinal direction of the machine. Further, a cutter 36 is provided at the tip of the suction nozzle 39.

An auxiliary gripper (not shown) that is opened and closed by an electromagnetic solenoid or an air cylinder (not shown) is provided between the main air jet nozzle 22 and the gun nozzle.

A cam 25 for operating the cutter upper blade is fixed to a shaft that rotates in conjunction with the crankshaft, and the cam 25 swings a lever to rotate the movable lower blade 23. Further, the fixed blade 24 is loosely fitted to the support shaft 40 of the movable blade 23, and the electromagnetic solenoid 2
6.26'. During steady operation, the weft is cut by the fixed blade 24 and the movable blade 23, while when a stop signal is sent, the weft is prevented from being cut between the movable blade 23 and the fixed blade 24 by the action of the electromagnetic solenoid 26, 26'. A cutter for cutting the weft yarn is provided on the cutting board.

Both ends of the eastern member 41, which is longer than the weaving width at the end of the weave, are supported by a pair of vertical rods, and are installed above or below the woven fabric of the loom. The beam member 41 has one arm member 4 at the center of the weave width, or a plurality of arm members 4 spaced apart in the weave width direction, depending on the weave width, weave structure, yarn material, and the movement stroke of the arm member in the front and back direction.
The push-out member 31 is attached to a swing lever 32 which is rotatably supported at the tip of the arm member 42. The swing lever 32 is connected to a motor 43 via a gear 33, 33', and the push-out member 31 is rotated together with the swing lever 32 by the motor 43. .

Next, an example of a weft processing method at the time of abnormal stop using the apparatus of the present invention will be explained. The operation of the gripper and the main air jet nozzle 22 provided between the weft storage device and the main air jet nozzle 22 is controlled in synchronization with the rotation of the crankshaft, and the upper and lower warp threads 38 are controlled by the opening movement of the heald frame (not shown). The weft is inserted into the shed formed between the two by compressed air jetted from the main air jet nozzle 22.

A detector 34 installed near the selvage threads on the opposite side of the main air jet nozzle 22 checks the weft insertion state when the warp threads 38 are almost closed (crank angle 250 to 300 degrees).
For some reason, the weft yarn inserted into the shed does not reach the selvage yarn on the opposite side of the main air jet nozzle 22.
When a weft insertion error occurs, the detector 34 issues a weft insertion error signal. In response to this weft insertion error signal, the operation of the motor that drives the machine is stopped and the machine enters inertial operation.

Furthermore, when a weft insertion error signal is transmitted, the shutter 37 is caused to intersect the weft path. In this way, the weft yarn ejected from the main air jet nozzle 22 after a weft insertion error is guided by the shutter 37, reaches the suction nozzle 39, and is sucked into the suction nozzle 39.

Prior to suction by the suction nozzle 39, the roller 3 is separated from the roller 2 by the air cylinder 4, so that the weft yarn 7 is smoothly transferred from the suction pipe 5 to the suction nozzle 6. After the end of the weft yarn 7 has passed between the two rollers 2.3, the air cylinder 4 presses the roller 3 against the roller 2 to ensure the subsequent suction of the weft yarn 7 by the suction nozzle 6.

Further, the cutting function of the weft cutting cutter is temporarily inactivated so that the weft that has been inserted incorrectly is connected to the jet nozzle. That is, '/1111 solenoid 26.2
6' prevents the weft from being cut between the movable blade 23 and the fixed blade 24.

Therefore, weft insertion after sending the weft insertion error signal is prevented.
The weft yarn is connected from the shed to the main air jet nozzle 22 via the suction nozzle 39.

The machine, which was in inertial operation, moved for about one cycle, warp 3
8 is almost closed (crank angle: 3.00 degrees).

Next, prepare for a reversal. That is, the main air jet nozzle 22 is inactivated, the gripper is closed, or the auxiliary gripper is closed by an electromagnetic solenoid, and the weft supply mechanism is inactivated. On the other hand, the shutter 37 at the tip of the suction nozzle 39 is removed from the weft path. In this state, the drive motor can be reversed directly or an auxiliary motor (not shown) provided separately from the drive motor can be operated to rotate the machine about 48
The warp threads 38 are brought into an open state by reversing by 0 degrees (crank angle of about 180 degrees).

In this open state, by inserting the extrusion member 31 into the small gap between the weft yarn 35 and the woven fabric in response to an extrusion start signal, the machine automatically removes the weft yarn 35 that has been inserted incorrectly.
pull it away from the fabric. Note that the extrusion start signal may be sent by a timer when a predetermined time elapses after a stop signal such as the weft insertion error signal mentioned above is sent, and when the machine is reversed and the machine is in the open state, it is sent by a limit switch, etc. It may be transmitted by a signal, or it may be transmitted by manually pressing a push button.

In this state, the weft yarn 35 that has been removed from between the warp yarns is actively pulled out by the pull-out roller 2.3 and removed by suction by the suction nozzle 6. In particular, the weft yarn 35 that has been separated from the woven fabric as described above is no longer a warp yarn. 3 suction nozzles, 6 suction nozzles and 2.3 pull-out rollers because they are not held securely.
This makes it easy to use and remove.

After the warp threads are removed in this way, the machine is turned over approximately 270 degrees until the warp threads 38 are closed (crank angle approximately 270 degrees), and the air jet loom is activated by turning on the switch automatically or by obtaining one. as appropriate.

Next, the main air jet nozzle 22 is activated. The auxiliary gripper is opened by de-energizing the electromagnetic solenoid, while the gripper is also in a steady operating state. Furthermore,
The weft supply and compensation mechanism is put into operation. In this state, restart the operation of the air jet room.

In the above explanation, an example of repairing a weft yarn that has been inserted incorrectly has been explained, but the present invention can also be applied when the air jet loom is stopped due to a warp yarn breakage, a selvage yarn breakage, or a manual operation.

In addition, in the above explanation, when a mistake such as a weft insertion error, a weft supply error, or a warp or selvage thread breakage occurs during machine operation in a fluid jet loom, the weft insertion is performed next to the error thread. The weft was blocked and suctioned. but,
Even if the weft yarn following the missed yarn is gripped with a gripper etc. on the upstream side of the main nozzle when a missed yarn is detected, and the gripped weft yarn is removed by suction using the device of the present invention when the machine stops. good.

Note that the suction nozzle described above generates suction force by the ejector action of compressed air. However, the suction nozzle is not limited to one using an ejector action, and for example, a suction nozzle that is connected to a suction source and generates suction force may be employed.

According to the present invention, the weft can be reliably removed in the jet loom.

〔Effect of the invention〕

In the present invention, a pair of pull-out rollers are provided in the suction pipe, and the pull-out rollers reliably grip and transport the weft suctioned by the suction pipe, so that the weft can be reliably removed. Further, since the drawing roller is configured to be able to approach and separate, the drawing roller is opened at the start of suction, the weft is introduced between the drawing rollers, and the weft can be reliably gripped by pressing the comic drawing roller.

[Brief explanation of the drawing]

Fig. 1 is a side view of the pull-out roller according to the present invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 is an exploded perspective view of a part of the pull-out roller of Fig. 1, and Fig. 4 is an air jet room. FIG. 2.3... Pull-out roller, 21... Reed, 22... Main air jet nozzle, 34... Detector, 3... Suction nozzles.

Claims (1)

[Claims] 1. The tip of the mis-weft suction pipe is open at the outlet end of the main jet nozzle that inserts the weft into the shed, and at least one pair of pull-out rollers are disposed in the suction pipe so as to be able to approach and separate. Features a mis-thread removal device in the jet loom.