JP2659711B2 - Startup preparation device for shuttleless loom - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a shuttleless loom, and more particularly to a start-up preparation device in a shuttleless loom of a type that discharges wefts stored in a so-called electric drum at the time of weft insertion. It is.

2. Description of the Related Art Conventionally, as disclosed in, for example, Japanese Patent Application Laid-Open No. 57-29640, and as schematically shown in FIG. The weft yarn Y from the yarn feeding section, ie, the cheese 7 is inserted into the tubular winding arm 2 rotatably disposed in the motor, and the rotation of the winding arm 2 is detected by the proximity switch 4 so that the motor 8 When a predetermined amount of weft Y is stored on the peripheral surface of the winding drum 1 by the rotation of the winding arm 2, and when the stored weft is released, a solenoid driven penetrating the peripheral surface of the winding drum 1 is used. A weft supply device configured to release the weft Y stored on the same peripheral surface by pulling out the pin 3 and allow its release is known.

The use of such an electric drum 1 has the advantage that when the weft is cut, a pick finder for automatically restoring the opening to the same state as at that time is not required.

[Problems to be Solved by the Invention] However, after the trouble caused by the weft supply generated on the cheese side of the main nozzle 9, there is a problem that many troublesome manual operations that the operator must perform are generated.

That is, when a weft break occurs between the cheese 7 and the main nozzle 9, the reset button 10 is pressed to excite the solenoid 5 via the control device 6 to reset the weft onto the winding drum 1. Pull out pin 3,
If it remains, the preliminary winding on the winding drum 1 is pulled out, and then a new preliminary winding is formed. Then, the weft end is inserted into the main nozzle 9 so that the main nozzle 9 does not hinder the subsequent weft insertion. In addition, it is necessary to cut the weft end to a predetermined length with the cutter 13, and these operations have to be performed manually. Moreover, when a new preliminary winding is formed by pressing the preliminary winding button 11, the weft coming out of the drum 1 is fixed by hand and the preliminary winding is performed. Then, the insertion of the weft into the main nozzle 9 is performed after the end of the preliminary winding because the weft may be pulled back into the winding arm 2 before the end of the preliminary winding. When the tip of the inserted weft is cut by the manual operation of the cutter 13,
If the tip was too short, it could result in starting over from the preliminary winding operation.

Therefore, an object of the present invention is to provide a shuttleless loom having an electric drum, in preparation for starting after a trouble such as cutting of a weft occurs between a main nozzle and a cheese, the leading end of the inserted weft. An object of the present invention is to provide a start-up preparation device capable of automatically performing cutting with a fixed length.

[Means for Solving the Problems] For this purpose, the present invention relates to a method in which a weft from a yarn supplying section is wound by a predetermined amount by rotation of a winding arm, and locking and releasing of the wound weft is performed by a solenoid. An electric drum performed by a pin operated by excitation and demagnetization, a pressure source for supplying compressed air, and a main nozzle to which the compressed air is supplied at the time of threading and weft insertion. A start-up preparation device in a shuttleless loom for wefting the wound weft by the main nozzle at the time of weft release, a reset device for resetting the solenoid to a weft release state, and a predetermined number of turns on the electric drum. A pre-winding device for pre-winding the weft; a suction means disposed near the tip of the main nozzle, communicating with the pressure source via a valve device; A cutter disposed at a predetermined position where the weft to be sucked by the suction means can be cut, and a reset device for a solenoid of the electric drum and a valve device of the suction means are connected to each other when the reset device is operated. A valve opening command to the valve device to set a pin of the electric drum to a weft release state and to perform a suction operation of the suction means.

[Operation] For example, when a weft break occurs, a reset device is operated to excite a solenoid to set a pin in a weft release state in order to newly form a preliminary winding on the peripheral surface of an electric drum. Make it easier to pull out any weft that may be left on the electric drum. With a conventional boot preparation device,
As described above, the preliminary winding must be formed next, but in the present invention, the valve device is opened in conjunction with the operation of the reset device so that the weft can be inserted into the main nozzle before the preliminary winding is formed. Then, compressed air is supplied to the suction means from the pressure source. Since the main nozzle is of a type in which compressed air is supplied at the time of threading, if the leading end of the weft is brought to the weft inlet of the main nozzle, the weft passes through the main nozzle and is sucked by the suction means.

If the preliminary winding device is operated in this weft suction state,
Under the control of the control device, a predetermined number of turns of the preliminary winding are formed on the electric drum. Thereafter, the main nozzle into which the weft is inserted and the suction means from which the tip of the weft is sucked move toward the cutter, and the tip of the weft is automatically cut at a fixed length.

Therefore, after the reset device is operated, the leading end of the weft is conveyed to the weft inlet of the main nozzle, and thereafter, the preliminary winding device is simply operated, and the weft is cut at a fixed position from the leading end of the main nozzle.

Next, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts.

In FIG. 1, the configuration itself of the members denoted by reference numerals 1 to 11 may be the same as the conventional one described in connection with FIG. The winding arm 2 projects obliquely from the hollow rotary shaft 2a, and the rotary shaft 2a is supported at one end by bearings 2b, 2b, and at the other end by a winding drum (electric drum) via a bearing (not shown). ) 1 is supported in a stationary state. The gear 8a coupled to the output shaft of the motor 8 meshes with the large gear 8c fixed to the rotating shaft 2a via the intermediate gear 8b, and drives the motor 8 under a command from the control device 6 to rotate the motor 8 The attached arm 2 is rotated around the peripheral surface of the winding drum 1.

As shown, the control device 6 is connected to an encoder 14 that outputs a rotation angle signal in synchronization with the rotation of the loom. During normal operation of the loom, the control device 6
It operates based on the signal from 14 and instructs on / off of the solenoid 5 or lock / release of the weft in synchronization with the rotation of the loom. The control device 6 includes the proximity switch 4 described above.
In addition to the connection of the solenoid 5 and the solenoid 5, an electromagnetic valve for controlling various valves described later is electrically connected.

A locking shaft (not shown) rotatably supported between both side frames of the loom as is well known in the art.
A slide (not shown) for supporting the 12 is fixed, and a main nozzle or a weft insertion nozzle 9 is disposed at one end of the slide 12. A reed 15 is erected on the slay 12 in front of the weft insertion nozzle 9, and each of the reeds of the reed 15 has a recess forming a guide path 16 for the weft Y as shown in the figure. ing. Although not shown, the guide passage 16
A plurality of sub-nozzles are arranged at appropriate intervals along the sub-nozzle, and the weft yarn stably flies in the guide passage 16 by relay-injecting compressed air to these sub-nozzles.

A suction pipe or suction means 17 is disposed between the weft insertion nozzle 9 and the guide passage 16, and its suction port 18 is located below the flight locus of the weft injected from the weft insertion nozzle 9 into the warp opening and Open to the same locus. Further, the suction means 17 penetrates the slay 12, and is held by the above-mentioned slide via a bracket (not shown).
The suction means 17 includes a well-known ejector 17a, and the suction force is supplied from a pressure source 20, which will be described later,
Generated by injection of compressed air supplied to 17a.

In the embodiment, the above-described pressure source 20 is provided above the suction means 17.
A blow pipe 21 connected to the reed 15 is fixed to a side frame of the reed 15 by a stopper 22, and its injection port 21 a is connected to the suction port 18 of the suction means 17.
However, if the weft can be sucked only by the suction means 17, the blow tube 21 is not necessarily required.

A cutter 23 is arranged at the weaving end of the woven fabric W, and not only cuts the leading end of the weft at the time of starting preparation described later, but also cuts the weft inserted at every weft insertion at the time of beating, Separated from the inlet nozzle 9. The cutter 23 includes a fixed blade 25 and a movable blade 26 mounted on a fixed shaft 24. As schematically shown in FIG. 1A, the movable blade 26 is rotated about a support shaft 28 by a cam 27 rotated in synchronization with the rotation of the loom, and the lever 30 and the rod 31 urged by a spring 29. , Which cuts the weft. An air cylinder 32 is provided near the lever 30, and by supplying fluid to the cylinder 32, the piston rod 33 comes into contact with the lever 30, the cam follower of the lever 30 is separated from the cam 27, and the cutter 23 is deactivated. The state, that is, the state in which the weft cannot be cut, can be maintained. The air cylinder 32 is activated when a weft insertion error detection signal from a weft detector (not shown) is input to the control device 6, and can be configured not to cut the error yarn.

A guide bar 34 is provided in the vicinity of the entire swing locus of the weft insertion nozzle 9. One end of the guide bar 34 is fixed to the fixed blade 25 by a bolt 36, and the other end is fixed to a bracket 35 fixed to a frame of the loom.
Also, the guide bar 34 extends from the bracket 35 side to near the middle part so as to be substantially parallel to the swing direction of the slay 12,
From the intermediate portion to the tip of the fixed blade 25 of the cutter 23, the cutter 23 is bent so as to be gradually inclined toward the woven fabric W side. Therefore, the upper surface of the guide bar 34 is located between the swing locus of the weft insertion nozzle 9 and the swing locus of the suction port 18 of the suction means 17 from the bracket 35 side to the vicinity of the middle portion, and from the vicinity of the middle portion to the fixed blade. Up to 25, the shape intersects with the swing locus of the suction port 18.

A weft transfer means 37 is fixed to the front side of the upper end of the side frame of the reed 15 by a bolt 38 to which the stopper 22 of the blow tube 21 is fixed. The weft transfer means 37 is formed of a wire or a plate bent and extended downward, and its tip is located substantially above the guide bar 34 when the weft insertion nozzle 9 is retreated most, and moves in the cloth fell direction of the weft insertion nozzle 9. By the swinging of the guide bar 34, it enters below the guide bar 34 from near the middle portion thereof, and reaches the opening position of the cutter 23 in a state shown by a virtual line at the time of beating.

As described above, the compressed air of the pressure source 20 is supplied to the main nozzle 9, the sub-nozzle, the blow pipe 21, the ejector 17a, the air cylinder 32, and the like, and those pipes indicated by thick solid lines in FIG. The roads are provided with shut-off valves 39 to 43, respectively, and the control device 6 controls the opening and closing of them.

The operation in the configuration of the above embodiment is as follows.
During the operation of the loom, when a weft insertion error is detected by, for example, a weft detector (not shown), a stop signal of the loom is immediately output, and a fluid supply signal to the air cylinder 32 is output to the shutoff valve 43. When the loom stops, the piston rod 33 pivots the lever 30 counterclockwise to separate the cam follower from the cam 27. Is avoided. Further, based on the weft insertion error detection signal, the weft supply from the above-described weft supply device is stopped, and the weft insertion during the inertial operation until the loom is stopped is prevented. After the loom is stopped, the slay 12 is returned to the most retracted position, and a suction airflow is generated in the suction means 17 through a pipe having a shutoff valve (valve device) 42 or another pipe (not shown), and the blow pipe 21 The air flow is injected to form an air flow from the blow pipe 21 to the suction port 18. In such a state, when the weft supply stop on the side of the weft supply device is released and the shutoff valve 39 for threading is opened to supply compressed air to the weft insertion nozzle 9,
The weft that has been prevented from weft insertion is blown out from the weft insertion nozzle 9.
It is deflected to the side and is sucked by the suction means 17. At this time, the weft Y reaches the suction port 18 from the weft insertion nozzle 9 across the upper surface of the guide bar 34 as shown by the solid line in FIG. It is in a state of being sucked. Subsequently, when the slay 12 is swung toward the cloth fell,
The weft Y is slid on the upper surface of the guide bar 34 by the weft insertion nozzle 9 and the suction port 18, and is further positively pushed out from the vicinity of an intermediate portion of the guide bar 34 by the weft transfer means 37. Therefore, even if the weft insertion nozzle 9 and the suction port 18 move to a position below the warp on the weave front side, the weft Y is reliably transferred into the opening of the cutter 23 by the weft transfer means 37. At this point, since the fluid supply to the air cylinder 32 has already been stopped, the cutter 23 is in an operable state as in the normal operation, the weft Y is cut by the cutter 23, and the weft insertion nozzle 9 After being separated, the suction means 17 performs suction processing.
If the weft Y in the suction means 17 is gripped and pulled out by a pair of pull-out rollers (not shown) which can be arranged and separated in the middle, the wrong yarn in the warp opening can be simultaneously drawn out. . In addition, if the error yarn is separated from the cloth fell by a known error yarn loosening means or an operator, the error yarn can be more effectively treated.

If the cause of the weft insertion error is the cutting of the weft between the winding drum 1 and the weft insertion nozzle 9, the reset button (reset device) 10 is pressed to reset the weft on the winding drum 1. In conjunction with the operation, the solenoid 5 is excited to pull out the pin 3 under the command of the control device 6, and the shut-off valve 42 is opened, so that the blow pipe 21 and the ejector 17 are opened.
The compressed air is supplied to a, and an air flow from the injection port 21a to the suction port 18 is formed. Further, by the pressing operation of the threading button 44, the shut-off valve 39 is opened and the compressed air is jetted from the main nozzle 9 similarly under the command of the control device 6. Therefore, if the yarn end of the weft Y is brought to the weft inlet of the main nozzle 9, the weft passes through the main nozzle 9 and exits there, reaches the above-mentioned air flow, and is sent into the suction means 17 by the air flow. It is. The suction means 17 is provided with a weft sensor 17b. Under a command from the control device 6 based on a weft detection signal from the sensor 17b, the solenoid 5 is demagnetized to
Are inserted across the peripheral surface of the winding drum 1. next,
When the preliminary winding button (preliminary winding device) 11 is pressed, the drive motor 8 is operated under the command of the control device 6, and the winding arm 2 is rotated to form a preliminary winding on the peripheral surface of the winding drum 1. . The number of rotations of the winding arm 2, that is, the number of auxiliary windings, is detected by the proximity switch 4, and the control device 6
When the number of signals transmitted to the control device 6 reaches a predetermined value preset in the control device 6, the control device 6 issues an operation stop signal of the drive motor 8, thereby completing the preparation for starting.
Therefore, after that, as described above in relation to the operation in the case of a weft insertion error, if the slay 12 is moved to the cloth fell side, the suction means extends from the tip of the main nozzle 9 and straddles the guide bar 34. The weft contained in 17 is guided along the guide bar 34, reliably sent to the cutting area of the cutter 23, and is always cut at a fixed position from the tip of the main nozzle. Since the rotation angle of the machine when the weft is cut by the cutter 23 is known in advance, the shut-off valve 42 is closed via the control device 6 by the rotation angle signal from the encoder 14, and the blow pipe 21 and the ejector 17a The air supply to is stopped.

When the weft cutting occurs between the winding drum 1 and the cheese 7, the reset button 10 is operated to pass the weft through the rotating shaft 2a and the winding arm 2 and hold the weft to the weft inlet of the main nozzle 9. Then, only by actuating the preliminary winding button 11, thereafter, the cutting by the cutter 23 is automatically performed by the above-described procedure.

While the preferred embodiment of the invention has been described, various modifications can be made without departing from the scope and spirit of the invention. For example, in this embodiment, the weft sensor 17b is provided in the suction means to control the solenoid 5, but a timer function is provided to the control device 6 so that the time when the weft tip reaches the suction means 17 is empirically predicted. May be set to control the solenoid 5. Further, the supply of air to the blow pipe 21 and the ejector 17a is stopped by the fact that the cut piece of the yarn on the suction means 17 side is processed by the pair of pull-out rollers (not shown) and becomes non-existent. May output a reset signal, thereby closing the blow pipe 21 and the shutoff valve 42 of the ejector 17a. The cutter 23 is also used in association with a normal weft insertion operation. However, a cutter for starting preparation may be separately provided, and the leading end of the weft may be cut at a predetermined position. Further, a threading button 44 is separately provided to control the threading cutoff valve 39 for communicating with the main nozzle 9 based on the signal.
42 may be controlled. Further, the proximity switch may detect a balloon of thread, or may be of the type described in the above-mentioned Japanese Patent Application Laid-Open No. 57-29640.

In the illustrated embodiment, when a weft insertion error occurs, the air cylinder 32 operates to disable the cutting operation of the cutter 23. However, in implementing the present invention, it is necessary to make the cutter 23 inoperative. Instead, weft yarns with misinsertion may be cut as usual. In this case, weft insertion error processing is
For example, a device for pulling out a missed yarn above a warp as disclosed in JP-A-58-220856 or JP-A-62-62963 may be used, or the missed yarn may be taken out manually. .

[Effect of the Invention] Since the start-up preparation device of the present invention has the above-described configuration and operation, it is inserted from the winding drum to the main nozzle after the weft cutting in the shuttleless loom having the electric drum. The cutting of the leading end of the weft can always be automatically performed at a fixed position.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a main part of a shuttleless loom provided with a start-up preparation device according to the present invention in a partial perspective view, a partial cross-section, and a partial block, and FIG. FIG. 2 is a schematic side view of a cutter used, and FIG. 2 is a schematic view of a conventional startup preparation device. DESCRIPTION OF SYMBOLS 1 ... Electric drum (winding drum) 2 ... Winding arm 5 ... Solenoid 6 ... Control device, 7 ... Yarn feeding part (cheese) 9 ... Main nozzle 10 ... Reset device (reset button) 11 ... Preliminary winding device ( Preliminary winding button) 17 ... Suction means, 20 ... Pressure source 23 ... Cutter, 42 ... Valve device

Claims (1)

(57) [Claims] 1. An electric drum in which a weft from a yarn supplying section is wound by a predetermined amount by rotation of a winding arm, and a pin actuated by a demagnetization of a solenoid locks and releases the wound weft. A pressure source for supplying compressed air, and a main nozzle to which the compressed air is supplied at the time of threading and weft insertion, wherein the main nozzle feeds the wound weft when the weft is released by a pin of the electric drum. A start-up preparation device in a shuttleless loom for weft insertion, a reset device for resetting the solenoid to a weft release state, and a pre-winding device for pre-winding a predetermined number of turns of weft on the electric drum, Suction means disposed near the tip of the main nozzle and communicating with the pressure source via a valve device,
A cutter disposed at a predetermined position capable of cutting the weft drawn out of the main nozzle and sucked by the suction means, connected to a reset device for a solenoid of the electric drum and a valve device of the suction means, A control device for issuing a valve opening command to the valve device in conjunction with the operation of the device, setting a pin of the electric drum to a weft release state, and performing a suction operation of the suction means. Start-up preparation device in loom.