JPH0138125Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for quickly stopping the rotation of a bobbin for winding yarn.

When winding yarn in a textile machine, the yarn is wound as a package onto a rotating bobbin, and when the winding diameter of the package reaches a predetermined diameter, the yarn is doffed together with the bobbin. The above-mentioned methods of rotating the bobbin include inserting a cylindrical spindle into the hollow part of the bobbin and rotating the spindle, and rotating the bobbin or package by pressing the bobbin or package against the outer periphery of a friction roller that is rotationally driven. The present invention is applied to the latter method. In this method, the bobbin is supported at both ends by a device called a cradle arm.
During doffing, the package cage is separated from the friction roller by rotating the cradle arm, and after stopping the rotation of the bobbin, the bobbin is removed from the cradle arm,
Replace with a new empty bobbin.

In the above-mentioned doffing, even after the bobbin is separated from the friction roller, it rotates for a while due to its inertia, waits for it to stop, and then is removed. Therefore, in order to perform the doffing operation quickly, a brake mechanism is required to quickly stop the rotation of the bobbin, but conventionally, these mechanisms have insufficient braking action, making it difficult to smoothly perform the doffing operation. This has become an obstacle to implementation.

Therefore, an object of the present invention is to provide a device that can quickly stop the rotation of the bobbin during doffing, thereby facilitating the doffing operation and shortening the doffing time. The aim is to improve the operating rate of

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a yarn winding mechanism in a textile machine such as a spinning machine, an automatic winder, or a false twisting machine, and a plurality of horizontal frames 2 long in the front-rear direction in the plane of the paper are installed on a machine stand 1 of the textile machine. The winding mechanism is provided in the area between each horizontal frame 2. In FIG. 1, the lower horizontal frame 2a is provided with a traverse device 3 for traversing the yarn Y, and the upper horizontal frame 2b is provided with a fixed stopper 4, which will be described later.
A cradle arm 5 supporting the bobbin B is provided at the center position between b and is rotatable about a fixed shaft 33 parallel to the bobbin axis provided on the machine base 1.
A friction roller 6 is disposed between the arm 5 and the traverse device 3 and is rotationally driven by a drive source (not shown).

The structures of the bobbin B and cradle arm 5 are shown in FIGS. 1 and 2.

The cylindrical bobbin B has a brim-like flange 7 at both ends thereof, and further has cylindrical end portions 8, 8 on the outside thereof, and the thread Y is wound on the winding portion 9 between the flanges 7, 7. It is wound up as a package P.

The cradle arm 5 consists of a cradle arm main body 11 that is U-shaped in plan view and a grip part 12, and the arm main body 11 has a movable lever 14 rotatably supported by a shaft 13 at one end thereof, and a movable lever 14 fixed to the other end. A fixed lever 15 is provided. The movable lever 14 is biased by a spring 17 in the counterclockwise direction in FIG.
4 and 15. Also, the movable lever 14
has a lever-shaped gripping part 12 at its tip so as to be rotatable with a short shaft 18 parallel to the bobbin axis, and the gripping part 12 is held along the outer periphery of the one cylindrical end 8 of the bobbin B. It has an extending movable stopper 19. The movable stopper 19 has a first tube made of urethane rubber at a portion facing the outer periphery of the one cylindrical end 8.
The brake shoe 20 is fixed, and the grip part 1
2 is rotated counterclockwise in FIG. 1 about the short axis 18 of the movable lever 14, the first brake shoe 20 is pressed against the outer periphery of the cylindrical end 8. . Furthermore, the grip part 12 has a movable lever 1.
4, leaving the protrusion 21 at the lower end in the contact area with the vertical groove 2.
2 are formed in the grip portion 12 and the movable lever 14, and horizontal grooves 23 and 24 that cross the vertical groove 22 are formed, and a plate spring 25 is fitted across both the horizontal grooves 23 and 24. The plate spring 25 is attached to the grip portion 1
2 is pivoted in the clockwise direction in FIG. The posture shown by the solid line in the figure is maintained, and at this time the first brake shoe 20 takes a position away from the cylindrical end 8.

A plate-shaped wing piece 28 having a cam roller 27 is fixed to the cylindrical body 16 of the cradle arm 5.
The cam roller 27 is in contact with a cam surface 30 of a cam plate 29 rotatably supported by the lower horizontal frame 2a. A spring 32 is stretched between one end of the cam plate 29 and a receiver 31 fixed to the lower surface of the horizontal frame 2a.
The elastic force forces the cam plate 29 to pivot around the shaft 33 in the direction of the hour hand in FIG. are doing.

Next, the operation of the winding mechanism described above will be explained with some supplementary structural explanation.

When an empty bobbin B is attached to the cradle arm 5 and the arm 5 is pushed down, the bobbin B contacts the friction roller 6 and at the same time moves toward the arrow 3 of the roller 6.
As a result of the rotation in the five directions, the yarn Y starts rotating in the direction of arrow 36, and the yarn Y that is continuously supplied is guided by the traverse guide 37 that is reciprocated by the traverse device 3 and wound onto the bobbin B. A cylindrical package P is formed. During winding of the yarn Y, the cam plate 29 urges the cam roller 27 to rotate clockwise around the shaft 34, so that the cradle arm 5
always presses the package P onto the friction roller 6, and the bobbin B and package P continue to rotate at a constant circumferential speed. When the cradle arm 5 is at the solid line position a shown in FIG.
Assuming that the arm is fully wound, the worker should move the arm 5
gripping portion 12, and pivoting it upward as shown by the arrow 38 to move it to the two-dot chain line position b. In this turning process, first, since the cradle arm 5 is urged downward, the gripping portion 1
2 turns upward by a predetermined angle around the shaft 18 against the force of the leaf spring 25, and at this time, the movable stopper 1
The first brake shoe 20 of 9 presses the outer periphery of the cylindrical end 8 of the bobbin B to brake the inertial rotation of the bobbin B. If the cradle arm 5 rotates quickly, the bobbin B does not necessarily stop during the rotation, but the bobbin B may be fixed to the tip of the fixed stopper 4 when the cradle arm 5 reaches the two-dot chain line position b. The second brake shoe 39 comes into contact with the outer periphery of the cylindrical end 8 on the other end side of the bobbin B, and the bobbin B is quickly stopped by the frictional force of the first and second brake shoes 20 and 39. In addition, at the two-dot chain line position b, the cam roller 27 has climbed over the convex portion of the cam surface 30 of the cam plate 29, and the turning force of the cam plate 29 appears to urge the cradle arm 5 to turn upward via the cam roller 27. Therefore, even if the operator releases the grip portion 12, the other cylindrical end portion 8 remains pressed against the second brake shoe 39. After confirming that the bobbin B has stopped rotating, the operator opens the movable lever 14 to release the fully wound package P.
Remove the bobbin, attach a new empty bobbin, push down the cradle arm 5, and restart winding.

Furthermore, since the fixed stopper 4 is provided at a position opposite to the movable lever 14, the package cage P and the flange 7 do not come into contact with the fixed stopper 4 and become an obstacle when the bobbin B is attached or detached.

Regarding the structure of the grip part 12, the leaf spring 2
5 may be replaced by a coiled spring, or these springs may not be used and the grip portion 1
The gravity of the shaft 2 itself may be used as a biasing force around the shaft 18.

As explained above, according to the present invention, the brake shoes are brought into pressure contact with the outer periphery of both ends of the bobbin and the rotation of the bobbin can be braked simply by lifting the cradle arm. In addition, since the bobbin is pressed with a strong force, the bobbin is forced to stop rapidly, allowing the operator to perform doffing operations quickly and contributing to improving the operating rate of the textile machine.

Further, while one end of the bobbin is brought into pressure contact with the second brake shoe provided on the fixed stopper, the first brake shoe provided on the grip portion can be brought into pressure contact with the other end of the bobbin, and the fixed stopper is pressed against the second brake shoe provided on the fixed stopper. As a fulcrum, the operator can easily apply a large braking force with one hand, and the bobbin can be stopped quickly with ease of operation.

[Brief explanation of drawings]

FIG. 1 is a side view showing a winding mechanism of a textile machine, and FIG. 2 is a plan view of a cradle arm. 1... Machine base, 4... Fixed stopper, 5... Cradle arm, 8, 8... Cylindrical end of bobbin, 1
2... Gripping part, 14... Movable lever, 15... Fixed lever, 18... Short shaft, 20... First brake shoe, 34... Fixed shaft, 39... Second brake shoe, B...Bobbin.

Claims (1)

[Scope of utility model registration request] A cradle arm having a pair of levers supporting both ends of the bobbin is supported so as to be pivotable around a fixed axis on the machine side parallel to the bobbin axis. a gripping part rotatably supported on parallel short axes; a first gripping part provided at one end of the gripping part and pressed against the outer periphery of one cylindrical end of the bobbin as the gripping part pivots about the short axis; A second brake shoe is further fixed to a stationary stopper provided at a position corresponding to the doffing position of the cradle arm, the second brake shoe being in pressure contact with the outer periphery of the other cylindrical end of the bobbin. A bobbin rotation stop device characterized by: