JPS6233848A - Weft yarn treatment 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 Purpose of the Invention (Field of Industrial Application) The present invention is directed to the weft insertion of the wound stored yarn on the yarn winding surface which is about to be inserted during the machine inertia operation immediately before the machine stops. The present invention relates to a weft processing device for blocking.

(Prior Art) There are so-called air pool systems and drum pool systems as weft edge length storage devices in jet looms. In the air pool method, there is an inherent problem that a so-called pool shock occurs when the weft moves from a storage flight in which the weft flies in the presence of a stored weft to a length measurement flight with zero stored weft, which adversely affects the weft insertion state. . On the other hand, the drum pool type has the advantage of not having the above-mentioned pool shock and can be made more compact, and there has been a remarkable trend in recent years to adopt the drum pool type weft length measuring and storage device. However, it is difficult to completely avoid weft insertion errors, which are one of the major factors that reduce the quality of woven fabrics, even with the drum pool type weft measurement and storage device. To maintain quality, it is necessary to stop the machine and correct weft insertion errors. The machine is stopped based on a weft insertion error detection signal from the weft detector, but in high-speed machines such as jet looms, in order to prevent damage to various parts, the machine is stopped after the machine has inertia operated for at least one rotation. Since the machine is stopped, not only the weft threads that have been inserted incorrectly (hereinafter referred to as "missed threads") are beaten and woven into the woven fabric before the machine stops, but even the weft threads that follow the misplaced threads are inserted. He gets beaten with a whip. Therefore, the machine is reversed to release the warp from holding the misplaced thread and remove the misplaced thread. However, the grip of the weft thread by the warp threads is not released sufficiently, and removing the weft thread becomes extremely complicated.This, combined with the subsequent work to remove misplaced threads, causes the loom to stop for a long time. This will hinder the productivity improvement required for the G7 room.

In order to solve the above-mentioned problems, means for preventing weft insertion during machine inertia operation are disclosed in JP-A-51-64060 and JP-A-51-64064.

In Japanese Patent Laid-Open No. 51-64060, a weft insertion prevention means is embodied in an air pool system, in which one of a pair of length measuring rollers that feeds the weft to the air pool pipe side is press-contacted to the other so that it can be separated, and The movable rods are simultaneously moved by an electromagnetic solenoid for separating one length measuring roller from the other. When the machine is stopped, the electromagnetic solenoid is energized, one of the length measuring rollers is separated from the other, the length measuring function is canceled, and the movable rod clamps the weft to prevent weft insertion. be done.

In Japanese Unexamined Patent Publication No. 51-64064, the first receiving member is configured to be movable on the yarn path in front of the main nozzle for weft insertion, and an electromagnetic solenoid is used as the driving mechanism.

(Problems to be Solved by the Invention) However, the method disclosed in Japanese Patent Application Laid-open No. 51-64060 inevitably complicates the structure, and furthermore, the length measuring roller and the movable lever, which have a relatively large inertial mass, must be moved at the same time. However, there is a problem in response performance that it is difficult to prevent weft insertion before the weft insertion timing of a high-speed R& machine.

Furthermore, this conventional means cannot be applied to the drum pool method.

In Japanese Unexamined Patent Publication No. 51-64064, it is necessary to move and place a relatively large inertial mass retracting member from the yarn path in front of the main nozzle for weft insertion onto the yarn path, thereby ensuring sufficient response. Obtaining speed is difficult.

Structure of the Invention (Means for Solving Problems) Therefore, in the present invention, we focused on the drum pool method, which is superior to the air pool method, and focused on the weft thread locking body for controlling the weft thread, and developed a method that engages with the thread winding surface. A braking mechanism is incorporated into the reciprocating drive mechanism of the weft thread locking body which is disengaged and performs weft control, and the weft thread locking body is engaged with the yarn winding surface by operating the braking mechanism based on the machine stop signal. The reciprocating drive mechanism is regulated and held in a moving state.

(Function) In other words, in the case where the weft thread locking body is attached to a cam lever that is swung by a cam, a braking mechanism such as an air cylinder is activated based on the machine stop signal, and the weft thread locking body is attached to a cam lever that is swung by a cam. The cam lever is held at a swinging position that intersects with the plane. Normally, the weft insertion error detection signal is emitted after weft insertion, when the weft locking body intersects with the thread winding surface, and before beating the weft. It is sufficient to simply hold the cam lever in the oscillating position without oscillating it. Therefore, there is no need to swing the cam lever, which has a relatively large inertial mass, by the braking mechanism (the response speed is extremely high).

Further, when the weft locking body is driven by an electromagnetic solenoid, the reciprocating drive mechanism itself called the electromagnetic solenoid serves as a braking mechanism, and the position of the weft locking body is regulated at high speed based on the machine stop signal.

(Example) Hereinafter, an example embodying the present invention will be described based on FIGS. 1 to 3.

A support bracket 1-1 having an auxiliary arm 1a is fixed to a fixed part such as a side frame of a loom, and a rotary support shaft 2 is rotatably inserted through the support bracket 1. A weft guide hole 2 for guiding the weft Y supplied from a weft supply source (not shown) is provided at the axis of the rotation support shaft 2.
A is formed, and a timing pulley 3 is fixedly attached between the main body of the support bracket 1 and the auxiliary arm la.

A gear 4 is fixed to the front surface of the support bracket 1.
A support body 5 fixed to the rotation support shaft 2 is disposed on the front side thereof. A thread winding tube 6 which is obliquely intersecting with the rotation support shaft 2 and communicated with the weft guide hole 2a is mounted and supported on the support 5, and its tip opening is placed on the tapered peripheral surface 8a of the drum 8, which will be described later. It is located. A support cylinder 7 is supported at the tip of the rotary support shaft 2 so as to be relatively rotatable, and a gear 7a is formed on its peripheral surface, and a gear 7a is formed on its front surface from a tapered peripheral surface 8a and a straight peripheral surface 8b. A drum 8 having a thread winding surface is fixedly attached thereto.

A planetary gear mechanism 9 is fixed to the support 5, and an input planetary gear 9a is meshed with the gear 4, and an output M star gear 9b is meshed with the gear 7a. When the rotary support shaft 2 is rotated by this, the thread-wound tube 6 rotates integrally with the support shaft 2, and the planetary gear mechanism 9 also rotates integrally, so that the two inverted star gears 9a and 9b rotate with the gear 4. The drum 8 revolves around the rotation support shaft 2 while meshing with the drum 8, and the drum 8 is held stationary without rotating. Then, as the yarn winding tube 6 revolves around the drum 8, the weft yarn Y is wound around the circumferential surface of the drum 8. The yarn winding tube 6 rotates multiple times per one rotation of the machine, and the weft yarn Y is wound around the drum 8 multiple times.

As shown in Figure 2.3, there is a drive shaft 10 on the side of the drum 8.
are arranged parallel to the rotation support shaft 2, and a cam 11 is fixed at a position corresponding to the thread winding surface. Further, a timing pulley 12 is fixed to the drive shaft 10 at a position corresponding to the timing pulley 3, and both timing pulleys 3 and 12 are operatively connected by a timing belt 13. In this embodiment, the diameter of the timing pulley 12 is set to 304 times the diameter of the timing pulley, so that when the drive shaft 10 rotates once, the rotation support shaft 2 rotates four times.

A shaft 14 is connected between the rotation support shaft 2 and the drive shaft IO.
A cam lever 15 is rotatably supported on the shaft 10 at a position corresponding to the cam 11, and an auxiliary lever 15a is tightly connected to one end of the cam lever 15. A cam follower 15b provided at the other end of the lever 15 is pressed onto the cam surface of the cam 11 by a pressing spring 17 interposed between the other end of the lever 15 and the bracket 16 above it. As the cam 11 rotates, the cam lever 15 and the auxiliary lever 15a move toward the shaft 1.
It is designed to oscillate around 4.

A weft locking body 18 is fixed to the tip of the auxiliary lever 15a, and as the cam lever 15 swings, the weft locking body 18
The leading end of the thread enters into the hole 8C on the thread winding surface and leaves the assimilation 8C.

That is, the tip of the weft yarn locking body 18 intersects and separates from the similar winding surface from the outside of the yarn winding surface on the drum 8, and the weft yarn Y wound from the yarn winding tube 6 onto the tapered circumferential surface 8a is unwound. The weft thread Y is retained and stored by the weft thread stopper 18 which intersects with the wrapping surface, and when the weft thread stopper 18 separates from the thread winding surface, the weft thread Y can be pulled out to the weft insertion side. The stored yarn wound on the drum 8 is pulled out from the drum 8 during weft insertion by a weft insertion main nozzle (not shown) disposed in front of the drum 8, and is injected into the warp opening from the main nozzle and inserted into the warp opening. The ejected weft yarn Y is guided in flight through a weft guide path formed by a row of many weft guide members (not shown), and during beating, the weft yarn passes through an escape slit from the weft guide path, exits the weft yarn, and beats the weft. be done. A weft yarn detector is installed in the escape slit on the side opposite to weft insertion, and if a weft yarn is detected by the detector, the machine will continue to operate, and if it is not detected, a machine stop signal will be sent, and the machine will stop. will be stopped.

An air cylinder 19 is fixedly mounted on the bracket 16, and its drive rod 19a is disposed toward the connecting portion between the cam lever 15 and the auxiliary lever 15a. An adjustment bolt 20 is secured to the tip of the drive rod 19a, and when the drive rod 19a is in the protruding state, the tip of the weft locking body 18 is moved to a swinging position where it enters the hole 8C on the thread winding surface. The head of the adjustment bolt 20 can come into contact with the connecting end of a certain cam lever 15. An electromagnetic valve 21 is disposed between the air cylinder 19 and a compressed air supply source (not shown), and the operation of the air cylinder 19 is controlled by opening and closing the valve 21.

The electromagnetic valve 21 is normally closed, and is opened based on the machine stop signal to supply compressed air to the air cylinder 19.

Now, as shown by the chain line in FIG. 2, as the cam follower 15b moves to the trough of the cam 11, the weft locking body 18 separates from the yarn winding surface, and the yarn is wound while being locked by the weft locking body 18. The weft yarn Y, which has been wound and stored on the surface, is pulled out from the drum 8 by the operation of the main weft insertion nozzle, and is injected and inserted into the warp opening from the main nozzle. During this weft insertion, the cam follower 15b moves from the trough to the crest of the cam 11, and the weft locking body 18 intersects with the thread winding surface as shown by the solid line in FIG. If this weft insertion is not performed normally and a weft insertion error occurs in which the tip of the weft yarn Y does not reach the installation position of the weft yarn detector, the machine stop signal is sent, the machine stop is stopped, and the electromagnetic valve 21 will be opened. When the valve 21 is opened, compressed air is supplied to the air cylinder 19, and the drive loft 19a protrudes.

At this time, as shown in FIG. 1, the weft thread stopper 18 is in a state of intersecting with the thread winding surface, and the weft thread Y to be inserted following the weft insertion error is wound and stored on the thread winding surface. There is. Due to the protrusion of the drive loft 19a, the head of the adjustment bolt 20 comes into contact with the cam lever 15, and as shown in FIG.
Move the cam lever 1 to the swinging position where 8 intersects with the bobbin winding surface.
5 is retained as a regulation. The machine base has an inertia of approximately 1 until it stops.
During this inertial operation, the cam follower 15b is located at the valley of the cam 11, as shown in FIG.
That is, there is a time when the weft locking body 18 separates from the yarn winding surface and the wound stored yarn is pulled out from the drum 8, but the operation of the air cylinder 19 prevents the weft yarn locking body 18 from separating from the yarn winding surface. be done. Therefore, there is no pulling out of the wound stored yarn on the yarn winding surface, and weft insertion of the weft yarn following the missed yarn is avoided. When the machine stop signal is issued, the cam lever 15 is already placed at the swinging position where the weft thread stopper 18 intersects with the thread winding surface. Therefore, the response speed of the air cylinder 19 to prevent the insertion of the weft thread following a misplaced thread is determined by the air cylinder 19. Although it depends only on the response speed, the response performance of the cylinder 19 is extremely high since there is no load other than the drive rod 15a, and therefore the response speed for blocking weft insertion is extremely fast. That is, it is possible to sufficiently follow the high-speed operation of a jet loom, which is a high-speed loom, and weft insertion following a missed yarn is reliably prevented.

Further, since weft insertion is prevented using the weft locking body 18 that controls the weft on the thread winding surface, the structure of the weft length measuring and storage device is simple.

Of course, the present invention is not limited to the above-mentioned embodiment, but the embodiment shown in FIG. 4.5 is also possible.

In the embodiment shown in FIG. 4, the weft Y is controlled by a pair of weft locking bodies 22 and 23 arranged in parallel in the weft insertion direction, and both weft locking bodies 22 and 23 are approximately connected to the yarn winding surface. They are designed to alternately intersect and be spaced apart. And each weft locking body 2
An air cylinder 19 is disposed corresponding to the front cam lever 25 of the cam levers 24 and 25 that support the cam levers 24 and 23, and the protrusion of the driving rod 19a of the cylinder 19 causes the weft locking body 23 to come into contact with the yarn winding surface. It is regulated to be held in a crossed state. Also in this embodiment, when the weft locking body 24 is in a state of intersecting with the yarn winding surface, the air cylinder 1
9 is activated, and the response speed of weft insertion prevention is extremely fast.

In the embodiment shown in FIG. 5, the present invention is embodied in a weft length measuring and storage device in which a weft locking body 26 protrudes and retracts from within the drum 27 and intersects and separates from the yarn winding surface. The drum 27 is fixedly supported by a rotary support shaft 30 that is operatively connected to a machine drive source via a timing pulley 28 and a timing belt 29. It is fitted so that it can be slid in the direction. One end of the right-angled transmission lever 35 is connected to the drive rod 3 within the drum 27.
One end is engaged with the rotor 31a at the tip, and the other end is engaged with the rotor 26a at the base end of the weft thread locking body 26. The reciprocating movement of the drive rod 31 causes the weft thread locking body 26 to move toward the drum 27. It seems to be coming from within. Drive rod 3
A pressing spring 3 is provided between the base end of the rotary support shaft 30 and the base end of the rotary support shaft 30.
A rotor 34a attached to one end of a swing lever 34 that swings in response to the protrusion and retraction of the drive rod 33a of the electromagnetic solenoid 33 is in contact with the base end of the drive loft 31. The electromagnetic solenoid 33 is excited and demagnetized in synchronization with the weaving operation, and while the machine is in operation, the weft locking body 26 is moved out and out of the drum 27 by this excitation and demagnetization, but when a machine stop signal is issued, it is kept in the excited state. and weft locking body 26
is regulated and held in a protruding state from within the drum 27. In this embodiment as well, the machine stop signal is issued when the weft locking body 26 is protruding from inside the drum 27, that is, when the electromagnetic solenoid 33 is energized, and the response speed for blocking weft insertion is extremely fast. . The electromagnetic solenoid 33 is a reciprocating mechanism for driving the weft thread locking body 26, and also serves as a braking mechanism for regulating and holding the weft thread locking body 33 in a state intersecting with the yarn winding surface.

Further, the present invention can be embodied in a weft length measuring and storage device that uses the drive pin of an electromagnetic solenoid directly as a weft locking body.

Furthermore, although the above embodiments have referred to the machine stoppage due to the occurrence of a weft insertion error, the present invention can also be applied to cases where the machine stoppage occurs due to other reasons.

Further, the present invention can also be applied to a weft length measurement and storage device of a type that regulates weft yarns by balloon detection, such as that disclosed in Japanese Patent Application Laid-Open No. 57-29640.

Effects of the Invention As detailed above, the weft thread measuring device of the present invention regulates and holds the weft thread locking body which intersects and separates from the thread winding surface and controls the weft at a position intersecting with the thread winding surface based on a machine stop signal. The long storage device has an excellent effect in that it can reliably prevent weft insertion with high response performance in a jet loom, which is a high-speed loom, despite its simple configuration.

[Brief explanation of the drawing]

1 to 3 show an embodiment embodying the present invention.
The figure is a side view, Figure 2 is a front view, Figure 3 is a front view showing changes from Figure 2, Figure 4 is a front view showing another example, and Figure 5 is a partially broken view showing another example. FIG. Drum 8, bobbin winding surfaces 8a, 8b, cam 11 and cam lever 15 forming a reciprocating drive mechanism, weft locking body 18, air cylinder 19 and electromagnetic valve 21° forming a braking mechanism.

Claims (1)

[Claims] 1. In the jet loom where the machine is stopped based on the machine stop signal, the weft length measuring and storage device winds the weft supplied from the weft supply source onto the thread winding surface and pulls out the weft from the thread winding surface during weft insertion. A weft control weft locking body that engages and disengages from the yarn winding surface is linked to a reciprocating drive mechanism, and the reciprocating drive brings the weft locking body into a reciprocating state in which the weft yarn locking body engages with the yarn winding surface based on the machine stop signal. A weft processing device in a jet loom, in which a braking mechanism for regulating and holding the mechanism is incorporated in the reciprocating drive mechanism.