JP2587938B2 - Fixed drum type weft length storage device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION-Industrial Field of Application-The present invention relates to a method for dividing and storing two pick weft yarns prior to weft insertion so that weft insertion of two crossovers can be performed in a shuttleless loom. The present invention relates to a weft length measuring and storing device to be used, and in particular, to provide a weft length measuring and storing device capable of realizing a combined flight with free flight and restricted flight in a fixed drum type weft length measuring and storing device. Things.

-Conventional technology- Conventionally, a weft measuring and storing device having a non-rotating yarn storage drum and a yarn supply guide rotating to wind a weft around the drum, that is, a so-called fixed drum type weft measuring and storing device is used. 2
When performing weft insertion, as shown in Fig. 5,
The three threading pins 52a, 52b, 52c are provided to abut the peripheral surface of the drum 51 to thread the weft, and the threading pins 52a, 52b, 52c are advanced in this order, so that the rotating thread feeding guide 5 The weft b to be wound is applied to the pick pins 52a and 52b and 52b and 5
The first pick and the second pick are inserted by retracting the yarn pins 52a and 52b in this order, and then the pin 52a is advanced to retract the pin 52c. We are doing weft insertion for 2 replacement. In this weft insertion operation, the unwinding of the weft yarns d and c wound around the non-rotating drum 51 is completed by the pins 52b and 52c at the fixed positions, and thus the weft insertion is performed only by free flight. Will be In FIG. 5, 53 is a fixed yarn guide, 54 is a gripper, and 55 is a weft insertion nozzle.

On the other hand, in a so-called rotary drum type weft length measuring and storing device that winds and stores a weft supplied from a yarn feeding roller around a rotating yarn storage drum, for example, a device described in JP-A-56-58032 is used. In addition, a two-hopping device has been realized in which weft insertion of a continuous first pick and second pick is both performed by combined flight including free flight and restrained flight. FIG. 6 schematically shows the structure, 56 is a rotating drum, 57 is a flange provided at the center of the drum, 52 is a threading pin which advances and retreats near the nozzle side of this flange 57, and 58 is It is a yarn feeding roller.

-Problems to be Solved by the Invention-In the case of a rotary drum type device, the weft pins c and d on the yarn storage drum 56 are divided and stored by the yarn pin 52d at a fixed position and the yarn pin 52d The relative movement between the rotating drum 56 and the peripheral surface of the rotating drum 56 enables a restricted flight, and the locking pin 52d
Can be operated from outside. However, in a fixed drum type device in which the yarn storage drum is not rotating, when the weft on the yarn storage drum 51 is divided by the yarn-pinning pins 52a, 52b, and 52c, the weft insertion operation is performed only in free flight, and the first and the second are performed. It is impossible to obtain a two-over changing device in which two picks are both combined, and there is no fixed-drum type two-over changing device capable of weft insertion including restricted flight.

However, in shuttleless looms, especially water jet looms, the flying speed of the weft is high, so if weft insertion is performed only by free flight, a large inertia tension acts on the weft at the end of weft insertion, and yarn breakage occurs. Problems arise. On the other hand, the fixed drum type weft length measuring and storing device has various advantages that the rotary drum type does not have, such as low flight resistance and suitable for high speed, but a synthetic flight having free flight and restrained flight. Conventionally, the two-over changing device capable of realizing running has been limited to a rotary drum-type device, so that when weaving for two-over change, there was a problem that a fixed drum-type weft measuring and storing device could not be used. .

-Means for Solving the Problems- The present invention has a fixed drum type weft measuring device capable of performing a weft insertion of a combined flight consisting of a free flight and a restrained flight for both the first and second picks by the following configuration. The above problem has been solved by obtaining a long storage device.

The apparatus of the present invention is configured as a fixed drum type weft measuring and storing apparatus, that is, it includes non-rotating yarn storage drums 14 and 18 and a yarn feeding guide 5 which rotates to wind the weft around the drum. The yarn storage drums 14 and 18 are arranged with a gap 15 provided on the rotation center axis of the yarn feeding guide 5, that is, an extension of the yarn introduction shaft 4, and provided with rotation suppression means 22, 23, 24 and 25 respectively. Have been. In the gap 15 between the fixed yarn storage drums 14 and 18, a rotary transfer guide 37 that rotates synchronously with the rotary yarn feeding guide 5 is disposed. The rotary transfer guide projects beyond the outer periphery of the yarn storage drums 14 and 18 at a predetermined timing, and the yarn storage drums 14 and 18 at a predetermined timing.
Immersed into the inner diameter side from the outer circumference. This rotary transfer guide 37
Can be slidably or slidably mounted on a support 34 fixed on the extension of the yarn introduction shaft 4.

The rotary transfer guide 37 can be operated, for example, by a connecting member 46 that passes through a groove 45 or a hole provided in the yarn introduction shaft 4 in the axial direction. The rotation transfer guide 37 has a structure in which the centrifugal force is projected in the projecting direction (when the rotation transfer guide slides and retreats in the radial direction) or in the immersion direction (when the rotation transfer guide swings and retreats) due to the rotation. (When the mass at the base end side of the arm is large), it is sufficient for the rotational transfer guide 37 to be given an operating force in only one direction against the centrifugal force, and a metal band or wire is used as the connecting member. Etc. can be used. The groove 45 or the hole is provided at a position deviated from the axis of the yarn guide shaft 4, so that a structure that does not interfere with the weft a passing through the axis of the yarn guide shaft 4 can be provided.

The connecting member 45 can be operated by being connected to a sliding member 41 that is loosely slidably fitted only in the axial direction at the end of the yarn introduction shaft 4 opposite the nozzle, and this sliding member is a groove wheel. A structure in which the motion of the cam provided on the rotating shaft of the loom is converted into the forward and backward movement of the sliding body 41 by the operation lever 43 and applied to the connecting member 45 can be adopted.

-Operation- The weft length measuring and storing device having the above structure is loaded on a loom as a pair of two, and as shown in Fig. 2, the first device performs weft insertion of the first and second picks and the second device performs second weft insertion. The weft insertion of the third and fourth picks is performed, and one cycle of the weft change over two is completed with four cycles of the rotation of the loom. Since the operation of the first and second weft length measuring and storing devices merely differs in phase, only the operation of the first device will be described below with reference to FIGS. Here, arrows R and r in FIGS. 3 and 4 indicate the rotation direction of the rotary yarn feeding guide 5 and the rotary transfer guide 37, respectively.

At the time point A when the weft insertion of the second pick is completed, the weft b
Extends from the rotary yarn feeding guide 5 to a gripper (not shown), and the weft stopped to be unwound by the gripper has its end threaded at the nozzle side edge of the yarn storage drum 18 on the nozzle side. The yarn is wound around the yarn storage drum 14 on the side opposite to the nozzle by the rotation of the rotary yarn supply guide 5.

A rotary transfer guide rotating synchronously with the rotary yarn feeding guide 5
37 projects at a predetermined timing B, the front face 37a of which engages with the weft between the yarn storage drums 14 and 18, and rotates the weft wound on the non-nozzle side drum 14 at the same speed as the yarn feeding speed. It is transferred to the nozzle drum 18 (FIG. 3). FIG. 2 shows the weft winding amount M of the counter-nozzle 14 and the weft winding amount m of the nozzle-side drum 18 after the rotation transfer guide 37 protrudes. In the non-nozzle-side drum 14, the weft having the same length as the weft wound by the rotary yarn feeding guide 5 is transferred to the nozzle-side drum 18 by the rotary transfer guide 37. Maintained in quantity.

At time C, when the gripper of the first pick is opened and the weft flight starts, all the wefts d transferred to the nozzle-side drum 18 are unwound at a high speed, and are further separated and wound one turn from the anti-nozzle-side drum 14. The weft c engages the rear surface 37b of the rotary transfer guide (time point D, FIG. 4). The flying operation during this time is the free flight of the first pick.

The weft c engaged with the back surface 37b of the rotary transfer guide is fed out at the peripheral speed of the transfer guide 37 until the gripper closes, and continues to fly at high speed.
The weft insertion of the pick is completed (time E). L ₁ in the figure weft insertion length, L ₂ is a weft length remaining in the nozzle-far side drum 14 at the point E where the first pick is completed.

After the gripper is closed, the rotary transfer guide 37 is immersed at a timing F before the rotary transfer guide 37 makes one rotation,
The rotary yarn feeding guide 5 winds the weft for the second pick on the non-nozzle side drum 14 and stores the measured length.

Next, at time point G, the gripper of the second pick is opened, and the weft c wound around the non-nozzle side drum 14 is unwound and flies. At the point H when all the weft yarns stored in the yarn storage drum 14 have been unwound, the free flight of the second pick is completed, and the speed of the yarn fed from the yarn feeding guide 5 is further restricted at the same speed. Then, the weft insertion of the second pick is completed by closing the gripper (time point A).

After the above-mentioned movement is performed in the first device, the third and fourth picks are performed by the same operation in the second device, thereby completing the one-cycle 2 changeover.

FIG. 1 is a view showing an embodiment of the device of the present invention, in which 1 is a casing, 4 is a yarn guide shaft supported on the casing 1 by bearings 2 and 3, and 5 is a side of the yarn guide shaft 4. The reference numeral 6 denotes a yarn guide hole extending obliquely from one side, 6 denotes a yarn guide hole passing through the axis of the yarn guide shaft 4, and 7 denotes a yarn guide hole of the rotary yarn guide 5. The yarn introduction shaft 4, and thus the rotary yarn feeding guide 5, is connected to a pulley 8, an idle shaft 9, a gear 10,
The rotation is driven through 11.

On the extension of the yarn introduction shaft 4, a yarn storage drum 14 on the side opposite to the nozzle is supported by bearings 12 and 13.
The yarn storage drum 18 on the nozzle side is supported at 6 and 17. 19
Is a cover fixed to the casing 1, 20 is a cover mounted on a stationary member (not shown) by a pin 21 so as to be swingable in the left-right direction in the figure, and a magnet 22 mounted on the cover 19 is opposed to the magnet 22. Magnet 23 mounted on drum 14
With this, the rotation of the yarn storage drum 14 is suppressed, and
The rotation of the yarn storage drum 18 is suppressed by the magnet 24 mounted on the nozzle and the magnet 25 mounted on the nozzle-side drum 18 facing the same.

The nozzle drum 18 is axially supported via a sleeve 31, which is axially sandwiched between a bolt 32 screwed to the tip of the yarn guide shaft 4 and a step 33 of the yarn guide shaft. And is fixed, and thus rotates together with the yarn introduction shaft 4. A support disk 34 located between the yarn storage drums 14 and 18 is integrally formed at one end of the sleeve 31. A crank lever 36 is pivotally supported on the support disk 34 by a point 35. The rotation transfer guide 37 has a base end connected to one end of the crank lever 36, and a distal end located at one point on the outer periphery of the support disk 34. It is slid and slightly swingably guided at 38, and is provided diagonally in the radial direction. Therefore, the rotation transfer guide 37 rotates integrally with the yarn introduction shaft 4.

The yarn introduction shaft 4 is connected to the yarn storage drum 14 at the boss portion of the support disk 34.
A grooved disc 39 is loosely fitted in this portion so as to be slidable in the axial direction and relatively unrotatable, and the other end of the crank lever 36 is loosely fitted in the groove 40. On the other hand, a groove wheel 41 is loosely fitted to the base end of the yarn introduction shaft 4 so as to be slidable in the axial direction and non-rotatable relative to each other. 44 are fitted.
The sheave 41 and the grooved disc 39 are connected by a metal belt 46 that passes through an axial groove 45 provided on the peripheral surface of the yarn introduction shaft 4. During the rotation of the yarn introduction shaft 4, tension is applied to the metal belt 46 due to the centrifugal force acting on the rotation transfer guide 37, and the swing of the operation lever 43 is performed by the roller 44 via the roller 44. The lateral movement is transmitted to the grooved disk 39 via the metal belt 46, and the lateral movement of the grooved disk 39 is controlled by the rotation of the rotation transfer guide 37 via the swing of the crank lever 36. It is converted into a haunting motion. 47 and 48 are grooved disk 39 and grooved wheel 41
It is a sliding key that regulates the rotation of the wheel.

As described above, the gap 15 is formed between the yarn storage drums 14 and 18, and the outer periphery of the support disk 34 faces to close this gap 15. The rotating transfer guide 37 whose leading end is guided at one place on the outer periphery of the support disk 34 is
In the portion, the centrifugal force acting on itself with the rotation of the yarn introduction shaft 4 protrudes beyond the outer periphery of the yarn storage drums 14 and 18. A groove 49 for accommodating the protruding rotary transfer guide 37 is provided in the cover 20 on the inner diameter side. On the other hand, when the operation lever 43 is swung leftward in the figure at a predetermined timing, the leftward movement of the sheave wheel 41 causes the grooved disc 39 to move through the metal band 46.
, The crank lever 36 is swung clockwise in the drawing, and the rotary transfer guide 37 is retracted, and its tip is immersed from the peripheral surfaces of the yarn storage drums 14 and 18 to the inner diameter side.

Therefore, the swinging movement of the operation lever 43 can control the emergence of the rotary transfer guide 37 at an accurate timing. Further, the support disk 34 can be rotated around the axis of the yarn introduction shaft 4 by loosening the bolt 32, and the rotation causes the position between the rotary transfer guide 37 and the rotary yarn supply guide 5 to be moved. Can have a phase difference, and by adjusting this phase difference,
The yarn length of the first pick and the yarn length of the second pick (the yarn length of the third pick and the yarn length of the fourth pick) can be appropriately adjusted.

The operation of the device having the above-described structure has been described in detail in the section of the operation, and will not be described here. In the device having the illustrated structure, the rotary transfer guide 37 is mounted at an angle to the nozzle side drum 18,
The weft is scooped up from the tip of the rotary transfer guide 37 and is transferred from the non-nozzle side drum 14 to the nozzle side drum 18, so that the transfer of the weft can be performed smoothly and reliably.

The structure of the present invention is not necessarily limited to the structure of the above-described embodiment. For example, the sheave wheel 41 and the grooved disk 39 are inserted into the through holes provided at the eccentric positions of the yarn introduction shaft 4. A structure of connecting by a wire or a rod can be adopted. Furthermore, it is also possible to adopt a structure in which the rotary transfer guide is swung and retracted, and another link mechanism or cam mechanism can be used instead of the crank lever 36,
The movement of the rotary transfer guide 37 can be performed using a solenoid or a known planetary gear mechanism.

-Effects of the Invention- According to the weft length measuring and storing device of the present invention, the combined function of free flight and restricted flight is provided by the fixed drum system.
It is possible to perform weaving by changing over, and it is possible to perform weaving by changing over by using a fixed drum type measuring and storing device having various advantages.

In addition, there is no member that moves outside the yarn storage drum as in the conventional two-over weft length measuring and storing device.
A two-over weft length measuring and storing device which is very advantageous in terms of monitoring, maintenance, operation when inserting the weft, and the like can be obtained without the need for mounting means for these members, operation transmitting means, and the like.

[Brief description of the drawings]

1 to 4 show one embodiment of the present invention.
FIG. 1 is a cross-sectional view of the apparatus, FIG. 2 is a timing chart showing a weft insertion operation, and FIGS. 3 and 4 are plan views of main parts schematically showing the operation. 5 and 6 are views schematically showing a conventional apparatus, in which FIG. 5 shows a fixed drum type, and FIG. 6 shows a rotary drum type. In the figure, 4: yarn guide shaft, 5: rotary yarn feed guide 14, 18: yarn storage drum, 15: gap 22 to 25: magnet, 31: sleeve 32: bolt, 33: step of yarn guide shaft 34: support Disc, 36: Crank lever 37: Rotating transfer guide, 39: Grooved disc 41: Groove wheel, 43: Operation lever 45: Yarn shaft groove, 46: Metal belt c: Wound around the non-nozzle side drum Weft d: Weft transferred to the nozzle side drum

Claims (3)

(57) [Claims] 1. A fixed drum type weft length measuring and storing device for a shuttleless loom, comprising a non-rotating yarn storage drum and a yarn supply guide rotating to wind a weft around the drum. Two yarn storage drums (14) and (18) provided with a rotation suppressing means on the rotation axis are arranged with a gap (15) provided between the yarn storage drums (14) and (18). The yarn storage drums (14), (18) rotate synchronously with the yarn feeding guide (5) and pass through the gap (15) at a predetermined timing.
A fixed drum type weft length measuring and storing device, characterized by being provided with a rotary transfer guide (37) that protrudes and sinks from the outer peripheral edge of the weft. 2. A weft yarn (a) from a yarn supply source passes through an axis of a yarn introduction shaft (4) serving as a rotation shaft of the yarn supply guide (5) and is guided by the yarn supply guide (5). In the fixed drum type weft storage device, a groove (45) or a hole parallel to the axis is provided at an eccentric position of the yarn introduction shaft (4), and a connecting member (46) penetrating the groove or the hole in the axial direction. 2. The fixed drum type weft length measuring and storing device according to claim 1, wherein the reciprocating operation performs the projecting and retracting operation of the rotary transfer guide (37). 3. A rotary transfer guide (37) mounted between a pair of yarn storage drums (14) and (18) on a support (34) fixed to said yarn introduction shaft (4). 3. The fixed drum type weft length measuring and storing device according to claim 1, wherein an angle at which the support (34) is mounted around the yarn introduction shaft (4) is adjustable.