RU2240390C2 - Mechanism for tightening and releasing of warp on weaving machine - Google Patents

Abstract

FIELD: textile engineering.

SUBSTANCE: mechanism has free-wheel clutch comprising sprocket and cartridge, and probe for controlling of weaver's beam radius. Free-wheel clutch sprocket is connected through gear transmission to weaver's beam. Cartridge of free-wheel clutch is connected through slotted connection to conical toothed drum. Catch acting upon said drum is connected through tie-rod to lever. Probe is contacting with conical toothed drum through shaft and disk.

EFFECT: reduced rupture of warp threads and improved quality of fabric produced.

2 dwg

Description

The invention relates to textile machinery, can be used on a loom to equalize the tension of the warp threads and reduce their breakage.

A known mechanism of tension and release the warp on a weaving machine for feeding warp threads into the fabric formation zone under the influence of the warp threads of its own tension, comprising a web with a gear that mesh with the gear associated with the brake disc, which is pressed against the brake pads [I].

A significant drawback of the known mechanism of tension and tempering of the warp is that when the machine is stopped when the throat is fully open or when the weft thread is surfaced to the edge of the fabric, i.e. at the moment when the warp threads experience maximum tension, slipping of the brake disc relative to the brake pads. As a result, marriage appears on the fabric. The mechanism also does not have an accurate supply of warp threads to the fabric formation zone per cycle of a loom.

A known mechanism for tensioning and tempering a warp on a loom, comprising a rock mounted on one shoulder of a two-shouldered lever, the other shoulder of which is connected to a tension spring of the main threads and a brake spring mounted on one shoulder of a two-shouldered lever, on the other shoulder of which a brake friction brake block is mounted the two-shoulder lever has stops mounted one against the other, one of which is fixed to the spring-loaded shoulder of the lever carrying the friction brake block, while the end of the spring-loaded shoulder two shoulders of the lever carrying the rock is placed in the gap between the stops [2].

A significant drawback of this mechanism is the large presence of elastic ties, which leads to a decrease in the accuracy of the base during the work cycle of the loom.

The prototype is a mechanism for tensioning and releasing the warp on a weaving machine, comprising a fixed rock, mounted freely on the brake shaft of the brake pulley with the brake band covering it, and a lever with a roller connected to the spring of the brake band to interact with a profile clown, a worm gear whose wheel freely mounted on the brake shaft, an overrunning clutch, the sprocket of which is rigidly connected to the brake pulley, and the clip is rigidly connected to the worm gear wheel, the worm of which is fixed to the drive shaft of the machine, the probe for controlling the radius of the navoi is made in the form of a two-shouldered lever, one shoulder of which interacts with the threads on the Navoi, and the other is connected with the spring of the brake band by pulling the two-shoulder lever [3].

A significant drawback of this mechanism of tension and tempering of the warp on the loom is that the uniformity of tempering of the warp depends on the contact time of the roller with the profile of the cam. With a change in tissue density in the weft, the unevenness of the base supply increases, in this case, the profile eccentric must be replaced. In addition, the accuracy of the substrate in the formation zone of the fabric at the necessary times is highly dependent on the state of the brake band spring. Even a small change in the stiffness coefficient of the spring of the brake band, for example, as a result of its drawing, leads to a change in the coefficient of friction between the brake pulley and the brake band, which noticeably affects the change in the braking moment.

The technical result of the invention is to improve the quality of the fabric and reduce the breakage of warp threads by means of instant, accurate and timely release of the warp threads from the weaving on the signal of the rock and replacing the braking effect in the brake device with the effect of jamming occurring in the freewheel.

The specified technical result is achieved by the fact that in the mechanism of tension and tempering of the warp on a weaving machine containing an overrunning clutch, consisting of an asterisk and cage, as well as a stylus for controlling the radius of the navoi, according to the invention, the asterisk of the overrunning clutch is connected to the weaving by gear, and the freewheel ferrule is connected via a spline connection to a bevel gear drum, which is impacted by a dog, by means of a traction connected to the underbody lever, the probe for controlling the radius of the navoy through the shaft and claim to slide in contact with the conical sprocket.

The invention is illustrated by drawings, where Fig. 1 shows a kinematic diagram in isometry and Fig. 2 shows a section through a freewheel and a bevel gear.

The device contains a weaving bulk 1 (Fig. 1), through a gear 2 connected to the gear 3, rigidly mounted on the shaft 4. An overrunning clutch sprocket 5 is fixed on the same shaft. Rollers 6 are located in the grooves of the asterisk over which the overrunning clutch 7 is located made integrally with a spline sleeve 8, freely sitting on the shaft 4, the slots of which are included in the spline hole of the bevel gear drum 9 (figure 2), also freely sitting on the shaft 4. The bevel gear drum 9 consists of a cylindrical and conical parts . The cylindrical part of the drum is made in the form of a disk 10, and ratchet teeth 11 are applied on the surface of its conical part, on which there is a feed dog 12 (Fig. 1), located in the lower part of the spring-loaded rod 13, on the upper end of which an eye 14 is made which includes a roller 15 mounted on one of the levers 16, in the bearings of which a rock 17 is located. Below the rock there is a shaft 18 with a disk 19 rigidly fixed on it, on one of the bases of which a slide 20 is mounted. A spring 21 is mounted on the same shaft torsion. One end of it is connected to the shaft 18, and the other is connected to the bracket of the body of the loom. A probe 22 is fixed at the end of the shaft 18, by means of a spring 21 in contact with the weaving pile 1.

The mechanism works as follows. During the operation of the loom when changing the tension of the warp threads from the processes of shedding and surfing, the roller 15 of the leverage 16 freely moves in the eye 14 of the spring-loaded rod 13. Under the influence of the tension of the warp threads, the weaving fabric 1 (Fig. 1) tends to rotate clockwise and through the gear wheel 2, gear 3, shaft 4, turn the sprocket of the freewheel clutch 5 counterclockwise, which drives the rollers 6 into a narrow part of the groove, and the movement of the navoi stops.

With an increase in the tension of the warp threads due to the work of the tissue retraction mechanism, the rock 17 lowers downward, while the roller 15 of the leverage 16 presses on the lower part of the eye 14 and drives the dog 12 through the thrust 13, which, turning against the teeth of the bevel gear 9, turns counterclockwise, which leads to the rotation of the spline sleeve 8, and with it the clips of the overrunning clutch 7. In this case, the rollers are driven into the wide part of the clutch, which makes it possible to rotate the weaving fabric 1 and the sprocket under the action of the warp threads f freewheel clutch 5. As the warp is loosened and the thread tension decreases, the rock and the roller 15 of the rocker arm 16 rise up, the dog 12 stops rotating the bevel gear 9, which stops the clutch clutch 7, and the sprocket 5 drives the rollers 6 into the narrow part of the groove, and the Navoi turn will stop.

During the operation of the loom, the diameter of the winding of the weaving is changed, while the probe 22 under the action of the spring 21 moves closer to the axis of rotation of the weaving, as a result of which the shaft 18 rotates together with the disk 19. The disk 19, when it is turned, slides 20 through the disk through the disk 10 bevel gear drum 9. In this case, under the dog 12, a part of the drum, which has a smaller diameter, is supplied. As a result of this, the angle of rotation of the bevel gear drum 9, the clips of the freewheel clutch 7, and, accordingly, the weaving navoi 1, are increased.

The use of the claimed device in comparison with the prototype improves the quality of the fabric produced calico art. 262 on looms 180 by 2.1% with a decrease in the breakage of warp threads by 12.3%.

Sources of information

1. US patent No. 4485849, IPC D 03 D 49/08, 1984.

2. A.S. USSR No. 960330, IPC D 03 D 49/12, 1982.

3. A.S. USSR No. 1612010, IPC D 03 D 49/12, 1990.

Claims (1)

The mechanism for tensioning and tempering the warp on a weaving machine, comprising a freewheel consisting of an asterisk and cage, as well as a stylus for controlling the radius of the navoy, characterized in that the asterisk of the freewheel is connected to the weaving through a gear, and the cage of the freewheel is connected via a splined joint with a bevel gear drum, on which the dog acts, by means of traction connected with the undercut arm, moreover, the probe for controlling the radius of the navoi through the shaft and the disk with the slide contacts the bevel gear m.

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