JP3161382B2 - Automatic doffing device for spinning machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic doffing apparatus for a spinning machine for doffing a fully wound winding package,
In particular, the present invention relates to an automatic doffing apparatus for a spinning machine provided in an automatic yarn joining cart.

[0002]

2. Description of the Related Art Conventionally, when a take-up package of a predetermined spinning unit becomes full, supply of a sliver to a draft device, cutting of a yarn, and the like are performed, and a package lifting cylinder disposed on the spinning unit side. The cradle arm is rotated by, for example, moving the full package away from the drive roller by a predetermined amount. Next, the automatic yarn splicing truck equipped with an automatic doffing device arranged in the machine stand of the spinning machine was driven to the spinning unit where the winding package was full, and was equipped with the automatic yarn splicing vehicle. By operating an appropriate lever of the automatic doffing apparatus, the cradle arm holding the full package is opened, and the full package is dropped onto the full package transport device. Next, the cradle arm is rotated to the vicinity of the drive roller to supply the empty bobbin to the cradle arm, and then, when the thread hooking preparation operation is completed, the cradle arm is moved to the drive roller by the empty bobbin. 2. Description of the Related Art There is known an automatic doffing apparatus of a spinning machine that is rotated until it touches, and then, after forming a thread on an empty bobbin and forming a bunch winding, winding a thread on an empty bobbin.

[0003]

As described above, during the doffing operation, the cradle arm holding the full package rotates to the vicinity of the full package transfer device for transporting the full package. The cradle arm may be located near the drive roller due to a doffing operation error. Also, if the cradle arm that does not securely hold the empty bobbin is located near the drive roller, the empty bobbin will come off the cradle arm and fall into the traveling path of the automatic yarn splicing cart equipped with an automatic doffing device. Trouble occurs.

An object of the present invention is to solve the problems of the above-described conventional automatic doffing apparatus for a spinning machine.

[0005]

According to the present invention, in order to achieve the above-mentioned object, first, there is provided an extruding means for moving a cradle arm to a predetermined position apart from a driving roller, The extruding means does not abut the cradle arm of the full package, but abuts the cradle arm of the small-diameter package or the empty bobbin. Second, the extruding means is provided on the automatic yarn joining bogie. Thirdly, the extruding means is driven at the beginning of the doffing operation to perform the extruding operation.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, referring to FIG. 1 which is a schematic front view of a spinning machine in which a number of spinning units U are juxtaposed and an automatic yarn splicing truck equipped with an automatic doffing device, the overall configuration of the spinning machine will be described. Will be outlined.

The sliver 2 supplied to the drafting device 1 from the sliver cans arranged behind the spinning machine is drafted by the drafting device 1, and then supplied to a spinning section 3 such as a spinning nozzle for generating a yarn by a swirling airflow. Is done. The yarn Y generated by the spinning unit 3 is sent out by a yarn sending-out member 4 composed of a nip roller and a delivery roller. And is wound on the rotating winding package 8.

[0008] P is an automatic yarn splicing truck equipped with an automatic doffing device. The automatic yarn splicing vehicle P is laid on a guide wheel 10 for holding an upper rail 9 disposed on a spinning machine and on the floor. A drive wheel 12 mounted on the lower rail 11 is provided, and the automatic yarn splicing truck P is configured to move in the spinning machine along the upper rail 9 and the lower rail 11.

[0009] T is a full package transfer comprising a conveyor 13a, a guide frame 13b and the like disposed on the opposite side of the traveling path of the automatic yarn splicing carriage P across the drive roller 7 and along the spinning machine. Device. Reference numeral 14 denotes an air cylinder disposed substantially horizontally on the automatic yarn splicing carriage P, and a pusher 14b that comes into contact with one arm 6a of the cradle arm 6 is attached to a tip of a piston rod 14a of the air cylinder 14. Have been. Note that 15
Is a pedestal that pivotally supports the lower end of the cradle arm 6 so that the cradle arm 6 is always urged toward the drive roller 7 by a suitable elastic member such as a coil spring (not shown). I have.

When the winding package 8 of the predetermined spinning unit U becomes full, the supply of the sliver 2 to the draft device 1 and the cutting of the yarn are performed, and the sliver 2 is disposed on the spinning unit side. Further, the cradle arm 6 is rotated by a package lifting cylinder or the like (not shown) to separate the full package 8 from the drive roller 7 by a predetermined amount as shown by a solid line in FIG. deep.

Next, at the position of the spinning unit U where the winding package 8 is full, the automatic yarn splicing carriage P equipped with an automatic doffing device is stopped. If the take-up package 8 is full with a regular amount of yarn, the cradle arm 6 separates to the vicinity of the full package transfer device T when the take-up package 8 is separated from the drive roller 7 at the time of the full package.
Activate the air cylinder 14 and move the piston rod 1
The pusher 14b does not push the cradle arm 6 even when the cradle arm 6 is advanced.

Further, when executing a series of doffing cycles, the cradle arm 6 must rotate to the vicinity of the full package transfer device T. In the present invention, the air cylinder 14 is operated. Thus, since the cradle arm 6 is always located near the full package transfer device T, even if the first doffing operation has failed, the doffing operation can be attempted again.

Delivery of a full package, installation of an empty bobbin,
The cradle arm 6 with the empty bobbin attached due to the failure of the automatic doffing operation including the process of threading and starting spinning
Is located at the position shown by the two-dot chain line in FIG. 2, and if the cradle arm 6 is opened without pushing out the cradle arm 6 as it is, the empty bobbin attached to the cradle arm 6 falls directly below and the automatic thread In some cases, the vehicle fell on the traveling path of the connecting truck P. According to the present invention, the cradle arm 6 is pushed out onto the transport device T by the pushing means at the beginning of the doffing operation.
Empty bobbin that has come off from the package is securely filled package T
Began to fall.

In the above-described embodiment, an example is shown in which the air cylinder 14 is provided as a means for pushing the cradle arm 6 to a fixed position. However, instead of the air cylinder 1, a rod pushed out by a cam, ,
The cradle arm 6 can be pushed out to a certain position by a cam or the like that comes into contact with the cradle arm 6, and is not limited to the above-described embodiment. Also, the example in which the pushing means of the cradle arm 6 is provided in the automatic doffing device provided in the automatic yarn splicing bogie has been described. It can also be applied to a frying device.

[0015]

Since the present invention has the above-described structure, the following effects can be obtained.

In the automatic doffing operation, the cradle arm not located at the predetermined position is moved to the predetermined position by the pushing means, so that the automatic doffing operation can be performed regardless of the position of the cradle arm.

Since the cradle arm is moved to a predetermined position away from the drive roller every time the doffing operation is performed, even if the first doffing operation fails, the doffing operation can be attempted again.

Since the extruding means is provided in the automatic doffing device mounted on the automatic yarn joining bogie, the device associated with the spinning machine can be simplified.

Since the pushing means is driven at the beginning of the doffing operation, the package can be reliably discharged regardless of whether the package is full, empty bobbin, or a package of various winding diameters therebetween. The bobbin does not drop onto the traveling path of the automatic yarn splicing vehicle and hinders the traveling of the vehicle.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a spinning machine in which a number of spinning units are juxtaposed, and an automatic yarn splicing vehicle equipped with an automatic doffing device.

FIG. 2 is a schematic side view of a spinning machine and an automatic yarn splicing truck equipped with the automatic doffing device of the present invention.

[Explanation of symbols]

 P ····· Automatic yarn splicing cart T ···· Full package transfer device 7 ···· Drive roller 8 ··· Rewind package 14 · ... Air cylinders

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65H 67/04 D01H 9/10 D01H 15/00

Claims (3)

(57) [Claims] An extruding means for moving a cradle arm to a predetermined position distant from a driving roller is provided, and the extruding means does not come into contact with a cradle arm of a full package, but a small-diameter package or an empty bobbin. An automatic doffing device for a spinning machine, wherein the device is in contact with the cradle arm. 2. An automatic doffing apparatus for a spinning machine according to claim 1, wherein said pushing means is provided in an automatic doffing apparatus mounted on said automatic yarn joining bogie. 3. An automatic doffing apparatus for a spinning machine according to claim 1, wherein said pushing means is driven at the beginning of an automatic doffing operation by the automatic doffing apparatus.