JPS582901B2 - Yarn end gripping device using cradle arm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that captures the yarn end of an empty tube held by a cradle arm at the beginning of winding, and in particular, the present invention relates to a device that captures the yarn end of an empty tube held by a cradle arm at the beginning of winding, and in particular, captures the yarn end of an empty tube without stopping the yarn running as in spinning etc. The present invention relates to a device for capturing an edge.

Conventionally, in the above-mentioned apparatus, a saw gear or pin for hooking the yarn end is provided on the cradle arm, or the yarn end is held between the empty tube end and an empty tube gripping piece of the cradle arm.

However, in the former case, in order to successfully catch the running thread, the width of the gear or pin must be made larger than a certain length, and therefore a certain distance is created from the hooking position of the thread end to the end of the empty tube. Therefore, after the thread makes several turns on the rotating empty tube gripping piece of the cradle arm, it reaches the spatial position and is caught by the traverse guide, and when the package is removed from the cradle arm after the tube is full, the above several turns The long end of the thread comes out from the package, and it is necessary to take measures such as cutting it into shorter lengths with a cutter later, and the end of the thread caught on the thread hook may become an obstacle to removing the package.

Furthermore, the thread ends entangled in the hook must be cleaned and removed every few times of dotting, which is troublesome.

In the latter case, the two arms of the cradle arm swing relative to each other around the pin, so when the circumferential gripping edge of the empty tube gripping piece of the cradle arm hits the empty tube, the part that comes into contact with the empty tube quickly and There are parts that come into contact late, and the pressing force of the parts that come into contact early tends to be large, while the pressing force of the parts that come into contact late tends to be small, and in bad cases, a gap may be created between the part that should come into contact late and the hollow tube. Therefore, if the yarn end is caught in a portion that comes into contact late, a yarn catching error often occurs.

In addition, the thread end must be inserted between the empty tube and the gripping piece in a timely manner that is difficult to time, and the empty tube can only be driven a little later than the thread end is captured. .

The basic gist of the present invention is to clamp the yarn end between two clamping pieces that are provided at the tip of the cradle arm and move relative to each other.

The relative movement of the two gripping pieces can be performed separately from the empty tube gripping by the cradle arm, so there is no need for difficult timing operations. By rotationally driving and then catching the yarn end by the approaching relative movement of the gripping piece, it is possible to simultaneously capture the yarn end and traverse the yarn onto the empty tube, and also to remove the package from the cradle arm. The grip on the yarn end can be released by the relative movement of the gripping piece away from the yarn end prior to the first winding. In this case, there is an effect that the operation of removing the entangled yarn from the yarn end gripping device becomes unnecessary.

The invention further provides that one of the gripping pieces serves as empty tube gripping piece.

In this case, there is no substantial distance between the gripping point of the yarn end and the end of the empty tube, resulting in the effect that the yarn end at the start of winding becomes extremely short.

In the present invention, the two gripping pieces are further urged in the direction of separation by a spring to facilitate insertion of the yarn end between the two gripping pieces.

Embodiments of the present invention will be described in detail below with reference to the drawings.

The cradle arm is a rotating arm 2 that rotates around axis 1 as a fulcrum.
and a swinging arm 4 that swings relative to the rotating arm 2 with a shaft 3 as a fulcrum, and these two arms support the empty pipe by pressing both end surfaces of the pipe. .

At the tip of the rotating arm 2 is a gripping disk 5 that grips one end of the empty tube P.
However, the yarn end gripping device 6 of the present invention is provided at the tip of the swinging arm 4, that is, at the empty tube end surface pressing portion of the arm 4.

The yarn end gripping device 6 includes a shaft 8 rotatably supported by the swinging arm 4 via a bearing 7 on the axis of the empty tube;
It is composed of a first disc-shaped gripping piece 9 fixed to the shaft 8 and a second disc-shaped gripping piece 10 supported slidably in the axial direction of the shaft 8. Serves as a gripping piece at the other end of P.

That is, the first gripping piece 9 has a thread gripping surface on one end surface of the second gripping piece, and the second gripping piece 10 has an empty tube gripping surface and a thread gripping surface. Although the first gripping piece 9 is fixed, the second gripping piece 10 can also be fixed and the first gripping piece 9 can be slidable, in other words, both gripping pieces 9
, 10 may be relatively movable.

A spring 11 is interposed between the gripping piece 9 and the gripping piece 10, and the gripping piece 10 is urged in a direction away from the gripping piece 9, that is, to the right in the figure.

A flange 8a at the tip of the shaft 8 serves as a stopper for the gripping piece 10.

12 is interposed between the rotating arm 2 and the swinging arm 4, and the swinging arm 4 is connected to the axis 3.
This is a spring that biases the clockwise direction in the figure using the fulcrum as the fulcrum.

13 is a thread guide plate that covers the outer periphery of the gripping piece 9.

The swinging arm 4 can be swung between the solid line position in FIG. 1 and the dashed line position in FIG. The gripping piece 9 and the gripping piece 10 come into contact with the flange 8a under the bias of the spring 11.
There is a gap 15 between them.

In this state, the empty tube P is inserted into the gripping disk 5 of the rotating arm 2.

Next, the protruding piece 14 is moved back one step and the gripping piece 1 is moved back as shown in FIG.
0 fits into the other end of the empty tube P under the bias of the spring 12, and the empty tube P is held between the gripping piece 10 and the gripping disk 5.

In this state, the empty tube P is pressed by the drive roller and driven to rotate.

In this state, the spring 11 is compressed by the spring 12, and the gripping piece 10 moves slightly toward the gripping piece 9, but a gap 15 is left between the gripping piece 9 and the gripping piece 10, and at this time, the thread guide plate The peripheral edge 13a of 13 is located in the gap 15.

In this state, the yarn caught in the yarn end suction tube 16 and being pulled out from a spinning machine, for example, is guided by the peripheral edge 13a and guided into the gap 15.

Next, the protruding piece 14 retreats to two stages and separates from the swinging arm 4,
The spring 11 is further compressed by the bias of the spring 12, and the gripping piece 9 is pressed against the gripping piece 10, and the thread Y is held between the gripping pieces 9 and 10.
The edge of is grasped.

At the same time or slightly later, the cutter 17 provided at the tip of the yarn end suction tube 16 closes and the yarn connected to the yarn end suction tube 16 is cut, and the yarn Y is immediately moved to a traverse guide (not shown) and placed in the rotating air. It is wrapped around the pipe P.

As shown in FIG.
By being guided by b, it moves accurately parallel to the gripping piece 9, so that uneven contact between the gripping pieces 9 and 10 does not occur, and no error in catching the yarn occurs.

Furthermore, the gripping pieces 9 and 10 have a ring-shaped recess 9 with a wedge-shaped cross section.
c and 10c are provided, which enable uniform contact over the entire circumference of the gripping pieces 9 and 10.
The thread held between the threads 10 and 10 is held in two places by sandwiching the recesses, and the thread end is held more reliably.

[Brief explanation of the drawing]

1, 2, and 3 are partially sectional front views of an embodiment of the present invention, and FIG. 4 is a side view of the same. 2...Rotating arm, 3...Axis, 4...
... Swinging arm, 6... Yarn end gripping device, 7...
...Bearing, 8...Shaft, 9...First gripping piece, 10...Second holding piece, 11...
・・・Spring, P・・・Empty tube.

Claims (1)

[Claims] 1. One swinging arm of a cradle arm, which has two arms that support the empty tube by pressing both end surfaces of the empty tube, can freely swing in a direction away from the end surface of the empty tube around one axis of the cradle arm. supported, and the empty tube end face pressing portion of the arm includes a shaft rotatably supported on the axis of the empty tube, a first gripping piece fixed to the shaft, and a first gripping piece attached to the shaft in the axial direction. A yarn end holding device is provided which includes a second gripping piece that is slidably supported and a spring that is inserted between the first and second gripping pieces and biases the gripping pieces in a direction to separate them. , the above first and second
One of the gripping pieces has an empty tube gripping surface and a yarn end gripping surface, and the other gripping piece has a yarn end gripping surface, and when the one gripping piece is pressed against the empty tube end surface, A cradle arm characterized in that the running yarn is guided into the gap between the gripping piece and the other holding piece, and the yarn is gripped by bringing both gripping pieces closer together. Yarn end gripping device.