JPH0350121Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to a traverse device for winding yarn onto a bobbin attached to a spindle.

(Prior Art) A conventionally known scroll cam for traversing has two spiral grooves extending in opposite directions on the circumferential surface that are continuous at both ends to form a single guiding groove. The traversing length of the thread guide that reciprocated while being engaged with the thread guide was constant.

Further, there is already known a means for reciprocating the thread guide sent by the rotation of the screw by reversing the screw at the end of the traverse to perform traverse.

(Problems to be solved by the invention) When yarn is wound in a manner close to parallel winding using the above-mentioned known means, the overlapping yarns tend to collapse and the wound yarn becomes loose, causing inconvenience when unwinding the yarn. This is a phenomenon that is often seen in the case of yarns such as optical fibers that are entangled or lack softness.

Furthermore, there is a disadvantage that the traversing length cannot be arbitrarily changed to accommodate the flange bobbin.

(Means for solving the problem) The present invention eliminates the conventional inconveniences as mentioned above,
This is a system in which the thread locus of the forward and backward movements of the traverse slide during traverse operation is changed to avoid overlapping of the threads, and the traverse length can be arbitrarily changed. A scroll cam having a guiding groove formed on its circumferential surface with two spiral grooves in opposite directions continuous at one end and discontinuous at the other end;
It consists of a switch operated by a traversing slide that engages with the guide groove, and the direction of rotation of the scroll cam is changed by the operation of the switch.

(Example) In the drawing, 1 is a cam box for traversing, in which a scroll cam 2 having a guiding groove 3 consisting of two spiral grooves A and B in opposite directions on its circumferential surface is rotated on a shaft. By moving the boat-shaped guide piece 5 engaged with the guide groove 3 as the scroll cam 2 rotates, the traversing slide 4 is reciprocated in the axial direction of the scroll cam 2 together with the guide piece 5. did.

The above is a known traverse mechanism, but the present invention has two spiral grooves extending in opposite directions with different traverse angles, as shown in FIG.
The two spiral grooves A and B are continuous at one end of the scroll cam 2, intersect with each other in the middle, and both spiral grooves A and B are discontinuous at the other end D.

Furthermore, the roller 6 of the traverse slide 4 and the engagement piece 8
A thread guide piece 9 is provided on the running piece 7 connected to the traversing slide 4 so that the thread guide piece 9 moves back and forth together with the traversing slide 4. The running piece 7 is provided with an actuating piece 11 facing the limit switch 10, and a driving wheel 11a supported at the bottom of the actuating piece 11 is provided on the running piece 7. It moves between the two rails 11b as shown in Figure 2. The limit switch 10 is connected to a bracket 13 whose position can be adjusted in the traverse direction on a guide rod 12 installed on the cam box 1, and is opposed to the actuating piece 11. Also, actuating piece 11
However, when the actuator 10a of the limit switch 10 is struck, for example, the connection of the reversible motor is switched to change the direction of rotation of the scroll cam 2.
In the illustrated example, the position of the switch 10 is adjusted by screwing the bracket 13 to which the switch 10 is tied into a screw rod 14 installed parallel to the guide rod 12, and rotating the screw rod 14 with a rotary grip ring 15. However, the adjustment mechanism is arbitrary.

(Function) In Fig. 3, traverse is performed from the A side of the guide groove 3, and at point B, the actuating piece 11 of the traverse slide 4 moves to the first position.
As shown in the figure, when the winding device is operated so as to collide with the opening/closing actuator 10a of the limit switch 10, the traversing slash 4 moves to the left in the direction of the arrow in FIG. 1 as the scroll cam 2 rotates. At the same time, the traveling piece 7 connected to the roller 6 by the engaging piece 8 also runs in the same direction, and the thread is traversed by the thread guide 9, so that the thread is wound onto a bobbin on a spindle (not shown). In this case, as shown in Fig. 4a, from A to B, the slide 4 travels along the movement trajectory _S1 , that is, the spiral groove A, and when the rotation direction of the scroll cam 2 changes due to the collision between the actuating piece 11 at point B, the slide 4 moves. The vehicle changes direction and travels to the right, but at this time it also travels backwards through _S1 , that is, the spiral groove A. When the slide 4 reaches the A end of the guide groove 3, the slide 4 changes its running direction by the continuous folding part of the guide groove 3, and the scroll cam 2 continues to rotate in the same direction, so its running trajectory becomes _S2 , that is, a spiral. After moving to the left according to the groove R, at point B, the rotation direction of the scroll cam 2 is changed by the switch 10, and the rotation direction of the scroll cam 2 is changed again to S ₂
It travels to the right on the trajectory of the spiral groove 3, reaches point A, and then repeats its travel to the left through the turn-around portion of the guide groove 3.

Also, the position of the limit switch 10 is shown in Figure 3 B ₁
When the yarn is wound by moving to , the traversing length from point A is only shortened, and the operating locus is the same as described above as shown in the fourth drawing.

(Effects of the invention) According to the invention, yarns with different twill angles are wound by one continuous guide groove on one side, and the same effect can be obtained as by winding yarn by two guide grooves with different twill angles. , the effect of eliminating the inconvenience of overlapping winding threads, and by moving the position of the limit switch, it is possible to easily form winding bodies with arbitrary traverse lengths with a single scroll cam. has.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view, FIG. 2 is a cross-sectional view taken along the - line in FIG.
The figure is a developed view of the circumferential surface of the scroll cam, Figures 4a and b
is a diagram showing the locus of the winding yarn. 2...Scroll cam, 3...Guiding groove, A, B...
...Spiral groove, 4...Trailing slide, 10...Limit switch.

Claims (1)

[Scope of utility model registration request] A scroll cam with a guide groove formed on its circumferential surface in which two spiral grooves with different traverse angles and opposite directions are continuous at one end and discontinuous at the other end, and a traverse slide that engages with the guide groove. A traversing device comprising a switch that is operated by the switch, and the direction of rotation of a scroll cam is changed by the operation of the switch.