JPH048530B2 - - Google Patents

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 method for preventing this.

(Prior Art) There are so-called air pool systems and drum pool systems as weft length measuring and storage devices in jet rooms. 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 a stored weft is present to a length measurement flight with a stored weft of zero, which adversely affects the weft insertion state. . On the other hand, in the drum pool method, there is no pool shock as mentioned above,
It also has the advantage of being compact, and there has been a noticeable trend in recent years to adopt a 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 loom is stopped based on a weft insertion error detection signal from the weft thread detector, but in high-speed looms such as jet looms, the loom is stopped after the loom has made one or more rotations in order to prevent damage to each part. Therefore, not only the weft threads that have been inserted incorrectly (hereinafter referred to as "missed threads") are beaten with a reed before the machine stops and woven into the woven fabric, but even the weft threads that follow the missed threads are also inserted and beaten with a reed. I end up. Therefore, when reversing the machine and removing the misplaced thread by releasing the grip of the misplaced thread by the warp threads, the weft yarn that has been beaten following the misplaced thread must be removed first, but the warp threads must be kept in the maximum open state. The state in which the weft is held by the warp is not released sufficiently, and removing the same weft becomes very complicated.This, combined with the subsequent work to remove misplaced threads, causes the loom to stop for a long time. This will hinder the required productivity improvement.

In order to solve the above-mentioned problems, a means for preventing weft insertion during machine inertia operation was proposed in Japanese Patent Application Laid-Open No. 1973-
It is disclosed in Japanese Patent Application Laid-open No. 64060 and Japanese Patent Application Laid-Open No. 51-64064.

In Japanese Patent Application Laid-open No. 51-64060, a weft insertion prevention means is embodied in the air pool system, in which one of a pair of length measuring rollers that sends out the weft to the air pool pipe side is pressed against 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, a yarn receiving member is configured to be movable on a yarn path in front of a main nozzle for weft insertion, and an electromagnetic solenoid is used as its driving mechanism.

(Problems to be Solved by the Invention) However, the method disclosed in Japanese Unexamined Patent Publication No. 51-64060 inevitably complicates the configuration, and moreover, the length measuring roller and the movable lever, which have a relatively large inertial mass, must be moved at the same time. In addition, there is a problem in response performance that it is difficult to prevent weft insertion before the weft insertion timing of a high-speed loom. Furthermore, this conventional means cannot be applied to the drum pool method.

In Japanese Patent Application Laid-Open No. 51-64064, a yarn receiving member with a relatively large inertial mass, which is retracted from the yarn path in front of the main nozzle for weft insertion, must be moved and placed on the yarn path, and sufficient response cannot be achieved. Obtaining speed is difficult.

Structure of the Invention (Means for Solving Problems) Therefore, the present invention targets the drum pool method, which is superior to the air pool method, and uses a weft control body to control weft yarns supplied from a weft supply source. In the jet room, where the machine is stopped after the weft insertion time has elapsed due to inertial operation, after the weft is detached from the thread winding surface of the weft length measuring and storage device, the weft is pulled out, the weft is inserted, and the machine stop signal is sent. During the inertial operation of the machine, including the weft insertion period, the weft control weft locking body that is engaged with the yarn winding surface is regulated and held from the time the signal is sent until the weft insertion period during inertial operation. , the machine is stopped while the weft control weft locking body continues to be engaged with the thread winding surface.

(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. usually,
The weft insertion error detection signal is generated between after weft insertion, when the weft locking body intersects with the thread winding surface, and before reed beating. It is sufficient to simply hold a certain cam lever in its swing position without swinging it. Therefore, there is no need to swing the cam lever, which has a relatively large inertial mass, by the braking mechanism, and 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, examples 1 to 3 that embody the present invention will be described.
This will be explained based on the diagram.

A support bracket 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 2a for guiding the weft Y supplied from a weft supply source (not shown) is formed in the axial center of the rotation support shaft 2, and a weft guide hole 2a is formed between the support bracket 1 main body and the auxiliary arm 1a. The timing pulley 3 is fixedly attached.
A gear 4 is fixed to the front surface of the support bracket 1, and a support body 5 fixed to the rotary support shaft 2 is disposed in front of the gear 4. 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 tube 7 is provided at the tip of the rotation support shaft 2.
is supported so as to be relatively rotatable, and has a gear 7a formed on its circumferential surface, and a drum 8 having a thread winding surface consisting of a tapered circumferential surface 8a and a straight circumferential surface 8b is fixed to its front surface. has been done.

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 planetary gear 9b is meshed with the gear 7a. When the rotation support shaft 2 is rotated by this, the thread-wrapped tube 6
rotates integrally with the support shaft 2, and the planetary gear mechanism 9 also rotates integrally, so that both planetary gears 9a,
9b engages with gears 4 and 7a while rotating support shaft 2
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 FIGS. 2 and 3, a drive shaft 10 is arranged parallel to the rotation support shaft 2 on the side of the drum 8, and a cam 11 is fixed at a position corresponding to the bobbin winding surface. There is. Further, a timing pulley 12 is fixedly attached to the drive shaft 10 at a position corresponding to the timing pulley 3, and both timing pulleys 3,
12 are operatively connected by a timing belt 13. In this embodiment, the diameter of the timing pulley 12 is set to four times that of the timing pulley 3, and when the drive shaft 10 rotates once, the rotation support shaft 2 rotates four times.
It is supposed to rotate.

A shaft 14 is disposed between the rotation support shaft 2 and the drive shaft 10 in parallel with both shafts 2 and 10, and a cam lever 15 is rotatably supported on the shaft 10 at a position corresponding to the cam 11. At the same time, an auxiliary lever 15a is tightly connected to one end thereof. 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 swing about the shaft 14. A weft locking body 1 is attached to the tip of the auxiliary lever 15a.
8 is fixed, and as the cam lever 15 swings, the tip of the weft thread locking body 18 engages with the hole 8 on the thread winding surface.
The hole 8c enters the hole 8c and leaves the hole 8c. That is, the tip of the weft thread locking body 18 intersects with and separates from the thread winding surface of the drum 8 from the outside, and the weft thread Y wound from the thread winding tube 6 onto the tapered peripheral 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. Injected weft yarn Y
The weft yarn is guided flying through a weft guide path formed by a large number of rows of weft guide members (not shown), and during beating, the weft escapes from the weft guide path through an escape slit and is beaten. A weft thread detector is installed in the escape slit on the side opposite to weft insertion, and if the detector detects a weft thread, the machine continues to operate, and if it is not detected, a machine stop signal is sent.
The machine is stopped.

An air cylinder 19 is fixedly mounted on the bracket 16, and its driving rod 19a is disposed toward the connection between the cam lever 15 and the auxiliary lever 15a. An adjustment bolt 20 is screwed onto the tip of the drive rod 19a.
When a is in the protruding state, the head of the adjustment bolt 20 comes into contact with the connection side tip of the cam lever 15, which is in the swinging position where the tip of the weft thread locking body 18 enters the hole 8c on the thread winding surface. It's becoming possible. 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, when 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 stopper 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 rod 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 rod 19a, the head of the adjustment bolt 20 comes into contact with the cam lever 15,
As shown in FIG. 3, the cam lever 15 is regulated and held at a swinging position where the weft thread stopper 18 intersects with the thread winding surface. The machine base rotates about one and a half times due to inertia until it stops, and during this inertial operation, as shown in FIG. There is a time when the wound stored yarn is pulled out from the drum 8 away from the surface, but the actuation of the air cylinder 19 prevents the weft locking body 18 from separating from the yarn winding surface. 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 moved to a swinging position where the weft thread locking body 18 intersects with the thread winding surface.
Since the air cylinder 19 has already been placed, the response speed for blocking weft insertion of the weft following the missed yarn is the air cylinder 19.
However, 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. In other words, it is possible to sufficiently follow the high-speed operation of a jet room, which is a high-speed loom, and weft insertion following a missed yarn is reliably prevented.

Also, a weft locking body 1 for controlling the weft on the yarn winding surface.
8 to prevent weft insertion, the structure of the weft length measuring and storage device is simple.

The present invention is, of course, not limited to the above-mentioned embodiments, but also includes the embodiments shown in FIGS. 4 and 5, for example.

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. The front cam lever 2 of the cam levers 24 and 25 that support the respective weft locking bodies 22 and 23
An air cylinder 19 is disposed corresponding to the weft thread 5, and a drive rod 19a of the cylinder 19 protrudes so that the weft thread stopper 23 is regulated and held in a state intersecting with the thread winding surface. In this embodiment as well, the air cylinder 19 is activated when the weft locking body 24 intersects with the yarn winding surface, and the response speed for preventing weft insertion 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, and a drive rod 31 is longitudinally attached to the axial center of the support shaft 30. It is fitted so that it can be slid in the direction. One end of a right-angled transmission lever 35 in the drum 27 is engaged with the rotor 31a at the tip of the drive rod 31, and the other end is engaged with the rotor 31a at the base end of the weft locking body 26.
a, so that the weft locking body 26 moves in and out of the drum 27 by the reciprocating movement of the drive rod 31. A pressure spring 32 is interposed between the base end of the drive rod 31 and the base end of the rotation support shaft 30, and the drive rod 3 of the electromagnetic solenoid 33 is
A rotor 34a attached to one end of a swing lever 34 that swings in response to the protrusion and retraction of the rotor 3a is in contact with the base end of the drive rod 31. Electromagnetic solenoid 3
3 is excited and demagnetized in synchronization with the weaving operation, and during machine operation, this excitation and demagnetization causes the weft locking body 26 to engage the drum 27.
However, when the machine stop signal is issued, it is kept in an excited state, and the weft locking body 26 is attached to the drum 2.
It is regulated and held in a protruding state from within 7. Also in this embodiment, when the weft locking body 26 is in a state of protruding from inside the drum 27, that is, when the electromagnetic solenoid 33
The machine stop signal is issued when the machine is in an excited state, 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.

Further, in the above embodiments, the machine stoppage due to the occurrence of a weft insertion error was mentioned, but 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 locking body for weft thread control, which is engaged with the thread winding surface, is regulated and held between the time when the machine stop signal is sent and the weft insertion time during inertia operation. According to the present invention, the weft thread control body continues to be engaged with the yarn winding surface during the inertial operation of the machine, including the weft insertion period, and the machine is stopped. There is no need to operate a member with a large inertial mass for blocking, and it is only necessary to restrict and hold the weft thread locking body that is engaged with the thread winding surface in that engaged state, so the structure is simple. Despite this, it has excellent high-speed response, and even when a loom rotating at high speed stops, it can be regulated within a short period of time from when the loom stop signal is sent until the next weft insertion time, and during inertial operation. This has an excellent effect of reliably preventing weft insertion.

[Brief explanation of drawings]

1 to 3 show an embodiment in which the present invention is embodied in a drum pool type weft length measuring and storage device.
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, yarn winding surfaces 8a and 8b, cam 11 and cam lever 15 that constitute a reciprocating drive mechanism, weft locking body 18, and air cylinder 19 that constitutes a braking mechanism.
and electromagnetic valve 21.

Claims (1)

[Claims] 1 The weft control weft locking body detaches the weft supplied from the weft supply source from the winding surface of the weft length measurement and storage device, pulls out the weft, inserts the weft, and after transmitting a machine stop signal, weft control is carried out by inertial operation. In the jet room where the machine is stopped after the weft insertion time has elapsed, a weft control weft handle that is engaged with the yarn winding surface between the time when the machine stop signal is sent and the weft insertion time during inertial operation. A jet room characterized in that the stop body is regulated and held and the machine is stopped by keeping the weft control weft locking body engaged with the thread winding surface during inertial operation of the machine including the weft insertion period. Weft processing method.