JPS6310072B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises longitudinal struts flexibly connected to each other forming a mandrel which can be operated between a large diameter open configuration and a small diameter closed configuration in conjunction with a manipulation medium for winding a thread. a transverse strut, and one at the tip of the mandrel to support and pull in the filament carried through the tip of the mandrel and cut off inside the ball when the ball is removed from the mandrel using one filament guiding device; This invention relates to a shield mandrel for an automatic yarn spool winding machine equipped with a filament gripping device.

A similar kind of shield mandrel for automatic yarn ball winding machine is
Described in DE-OS 2513144. It consists of longitudinal and transverse struts flexibly connected to each other and formed around the outside, the mission of which is to provide longitudinal struts between one open arrangement of large diameter and one closed arrangement of small diameter. It is to manipulate. For this purpose, the lower transverse strut is located in a fixed receiving device, while the middle transverse strut and the upper transverse strut are connected to an operating rod that can be moved axially within the receiving device.

Since it is well known that the ends of the filaments on the outside of the bobbin yarn will interfere with the next working process, the shield mandrel was equipped with a filament retraction device. This device is carried to the tip of the shield mandrel to take in the cut filament after the winding process is completed. For securing the filament end to the head of the mandrel, on one end side of the sleeve a number of hooks are distributed concentrically around the axis of the shield mandrel and are movable up and down in closed and open configurations of the mandrel. is connected to. These hooks protrude from the sleeve to grip the filament, which is carried through the tip of the mandrel by one filament guide, and the hooks at the tip are used to wrap and unblock the ball of yarn. It is removed from the mandrel and sinks into the sleeve to support the filament in place.

According to another filament retraction device according to the above-mentioned application, a hollow operating rod is used, which works in conjunction with a suction device. A plug was provided around the air intake to prevent the filament from slipping off the tip of the mandrel. The approximated filament is then placed between the plugs and the filament end is sucked into the operating rod through the air opening.

Both retraction devices shown in DE-OS 2513144 are of course more complex, which leads to higher production costs and additionally the operating costs of the retraction devices operated by intake air.

The cylindrical mandrel, which is composed of a vertical column and a number of horizontal operating columns, is restricted by the bobbin wool firmly attached to the blocked mandrel for removal of the bobbin yarn, especially for non-elastic yarns. In most cases, it will not cause operational failure.

Highly elastic yarns present special problems when drawing the filament. In that case, after the yarn has been separated, its uncontrollable properties do not prevent it from jumping out again from the gripper.

The object of the present invention is to create a shielding mandrel with a filament retraction device as mentioned in the beginning, to ensure a reliable working method, to simplify the construction and thus to manufacture it at a lower cost. The object of the present invention is to form a thread catcher in which the tip of the mandrel is provided with a sharply protruding sector-shaped cutout, each sector-shaped cutout facing a sector-shaped cutout in each case, and the sector-shaped cutout The thread catch tube is arranged around the filament in such a way that the gripping hook extends above the filament, the part facing downward from the point and extending to the terminal position of the sector cutout between the two sector cutouts. It will be resolved accordingly.

In a preferred configuration, the thread catcher forms the head of a sleeve tapering upwardly, the sleeve being provided with a slit for receiving or passing through the pillars of the shield mandrel, and the upper transverse struts extending into the sleeve. The pivotably supported middle and lower transverse struts are connected to a single operating rod operable within the sleeve.

In the present invention, a shield mandrel with a filament retraction device has been developed. This occurs because the end of the filament can be retracted axially into the shield mandrel without special components. The application of the configuration of the tip of the mandrel according to the invention in the form of a catch tube in conjunction with a gripping hook ensures a reliable grip and support for taking the end of the filament inside the bobbin yarn. As the filament carried in front of the tip of the shield mandrel slides down the side of the thread catcher, the filament is inevitably guided from the center below the gripping hook and reaches there.

Moreover, the protected position inside the catch tube of the gripping hook and the position of the post itself in the sleeve also give particularly advantageous results in the case of a closed arrangement due to the functionally reliable mode of operation. This reliably prevents the binding and movement that often occurred in the past and caused failures when being wound and removed from the mandrel.

According to another feature of the invention, the intermediate transverse struts extend in an arcuate manner and grip the longitudinal struts. This also completely eliminates the failures during the manufacturing process that conventionally occur at the tapered angle of the vertical and horizontal struts for tightening the filament.

In order to reliably grip and support particularly highly elastic yarns, the tip of the shield mandrel, which subsequently constitutes the thread catcher with gripping hooks, is further provided with a component which closes off the passage between the gripping hooks. proposed that the tip could be operated in time synchronization with the winding process between one arrangement that blocks the passageway and one arrangement that unblocks the passageway.

In a further advantageous embodiment, the component consists of a rod guided through the center of the thread catcher and a spindle-shaped point at its tip.

Another feature of the invention provides for the rod to be guided for movement within a bearing on the shield mandrel, and a clamping rod on the unobstructed end of the rod and a connection between the clamping rod and the bearing. A compression spring in between is provided for gripping the point and supporting it on the hook, and the point is operated at a position spaced from the gripping spring against the force of the spring by means of an operating rod acting on the clamping rod. can.

The filament tube formed according to the invention first of all allows the filament to be functionally and reliably inserted into the sector-shaped cut-out, and at the same time the filament is fed along the tip and guided below the gripping hook. Particularly in the case of thick and elastic yarns, a blocking device connected to the channel prevents the filament separated from the stock yarn from moving laterally and thereby from jumping out of the yarn catcher.

Embodiments of the present invention will be described with reference to the accompanying drawings.

The shielding mandrel shown in the exemplary embodiment has an upwardly tapered sleeve 1 together with a lower extension 2 as a support for the rotational drive of the mandrel. The sleeve is provided with a number of slits 1a distributed uniformly around its circumference, through which the upper transverse strut 3, the central transverse strut 4 and the lower transverse strut 5 are led, which can be flexibly attached to each other via the longitudinal struts 6 in a known manner. It is connected.

The diagram according to FIG.
is returned to the sleeve 1, thereby ensuring that the bobbin yarn can be removed from the mandrel without any hindrance.

The operation of actuation from the open configuration to the closed configuration and vice versa is taken care of by one operating rod 7 attached to the bearing of the sleeve, and at its end inside the shield, the operating rod has a receiving cylinder 7a. The middle horizontal strut 4 and the lower horizontal strut 5 are connected to each other, and the upper horizontal strut 3 is attached to the tip of the sleeve with a bearing.
It is fixed to the open sleeve 9.

To secure this opening sleeve to the sleeve 1, a conical extension of a clamping bush 10 serves, which cuts into a correspondingly formed slope of the opening sleeve and is guided from above through the opening sleeve. It is held by one countersunk head screw 11.

The shield mandrel is equipped with a filament pulling device in order to guide it to the tip of the shield mandrel after one of the winding steps and then to draw the separated filaments into the inside of the ball when the ball is removed from the closed mandrel. It is equipped with This device consists of one thread catch tube 8 formed at the distal end of the sleeve and one fan-shaped cutout 8a protruding from the tip, so that each fan-shaped cutout faces one fan-shaped cutout. They are distributed around the area. It is advantageous for the yarn catch tube to have three sector cutouts; it is likewise possible to form the yarn catch tube with five sector cutouts or seven sector cutouts. Grasp hook 8b from the tip of this fan-shaped cutout toward the inside and downward.
is attached, which reaches almost to the center and bridges the filament in the distal position between the two sectors.

The tip of the shield mandrel formed in this way is
Since the filament is guided sideways from the center to the sides of the fan-shaped cutout and thus always ends up below one gripping hook, it is possible to functionally reliably grip the approaching filament.

Highly elastic yarns also present special problems during filament retraction and, due to their uncontrollable properties, can spring back upwards from the gripper tube after being cut off.

Furthermore, in order to secure the capture also in the case of this thread, the device 1 according to the invention closes off the concentric passages between the gripping hooks after the gripper has taken up the thread.
Equipped with a piece. It consists of one spindle-shaped point 12 of a rod 13 mounted on a bearing so that it can move in a through hole of a countersunk screw 11. A clamping rod 14 opposite the point of the rod 13, and between this rod and the countersunk screw a compression spring 15 whose task is to grip the spindle-shaped point 12 and hold it in a closed position on the hook 8b. There is.

When the actuating rod 7 is actuated in the direction of the clamping rod 14, the rod 13 is thereby moved in the axial direction, unblocking the passage for introducing the filament and at the same time realizing an open arrangement of the shield mandrel.

The filament gripping device configured in this way is
This is not particularly advantageous only in the case of highly elastic yarns, as long as the filament separated from the stocked yarn is reliably prevented from being evacuated on one side and from jumping out of the yarn catching tube.
On the contrary, it has been found that the reliability of function is generally further improved in this device, which feeds back in such a way that the filament is necessarily conveyed by the spindle-shaped point towards the bottom of the gripping hook.

[Brief explanation of the drawing]

Figure 1 is a front view of the shield mandrel in its open state;
FIG. 2 is a front perspective view of the filament drawing device of the shield mandrel shown in FIG. 1; 1: sleeve, 2: lower extension of sleeve,
3: Upper horizontal support, 4: Middle horizontal support, 5: Lower horizontal support, 6: Vertical support, 7: Operating rod, 8: Line catching tube, 9:
Opening sleeve, 10: Tightening button, 11:
Countersunk head screw, 12: Spindle-shaped point, 13: Rod, 14:
Tightening rod, 15: compression spring, 1a: slit,
7a: Storage tube, 8a: Fan-shaped cutout, 8b: Grasp hook.

Claims (1)

Claims: 1. Longitudinal struts and transverse struts flexibly connected to each other forming a mandrel which can be operated between a large diameter open configuration and a small diameter closed configuration in connection with a manipulation medium for winding a thread; When removing the ball yarn from the mandrel, the filament carried through the tip of the mandrel and separated inside the ball yarn is 1
A shield mandrel for an automatic yarn winding machine is provided with a filament gripping device at the tip of the mandrel for supporting and drawing the filament using two filament guiding devices, and the tip of the mandrel is provided with a sharply protruding fan-shaped cutout 8a. forming a thread catching tube 8 with each fan-shaped cut-out facing one fan-shaped cut-out, the fan-shaped cut-out facing downward from the tip, and the fan-shaped cut-out between the two fan-shaped cut-outs facing downwardly from the tip; A shield mandrel for an automatic yarn spool winding machine, characterized in that a yarn catching tube is arranged around the filament so that the gripping hook 8b extending to the final position extends above the filament. 2. The yarn catching tube forms the head of one sleeve 1 tapering upward, and the sleeve is provided with a slit 1a for receiving or introducing the pillars 3 to 6 of the shield mandrel, and Claim 1, characterized in that the transverse strut 3 is pivotally supported and fixed in the sleeve, and the middle transverse strut 4 and the lower transverse strut 5 are connected to one operating rod 7 which can be operated within the sleeve. Nose shield mandrel. 3. The shield mandrel according to claim 1 or 2, characterized in that the middle horizontal support 4 extends in an arch shape and is connected to the vertical support 6. 4. The tips of the shield mandrels, which together with the gripping hooks 8b form the yarn catching tube 8, are each provided with one component 12, 13 that closes the passage between the gripping hooks, thereby closing and unblocking the passage. A shield mandrel according to any one of claims 1 to 3, characterized in that it can be operated in temporal synchronization with one winding process. 5. The shield mandrel according to claim 4, characterized in that its constituent parts consist of one rod 13 guided through the center of the yarn catching tube 8 and one spindle-shaped point 12 supported by the rod 13. . 6. A rod 13 is guided movably in each one of the bearings 9, 11 of the shield mandrel, and at the unobstructed end of this rod there is a clamping rod 14 and a clamping rod 14 between this clamping rod and the bearing. compression springs 15 are provided to support the point 12 on the gripping hook, and the point 12 is attached to the clamping rod 1.
Claim 5, characterized in that it can be operated in a position remote from the gripping hook 8b against the force of a spring 15 by means of an operating rod 7 acting on the gripping hook 8b.
Nose shield mandrel.