JPH1036010A - Backwound thread processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure that only a backwound thread is captured and cut. SOLUTION: A device, which processes a backwound thread (y) while rotating a fine spinning bobbin in a backwound thread processing device A, has a retaining member 41 which freely moves up and down, whose lower surface is greater than the upper end face of the fine spinning bobbin and dents in such a way as to be tapered toward its center, and the device has an air blowing means 31 for blowing air diagonally upward from slightly in front of the lower part of the bobbin to the back, with the retaining member 41 holding the upper end of the fine spinning bobbin and capturing and cutting the backwound thread (y) as air is blown. Two blowout holes for blowing air at an angle of about 75 degrees from the horizontal and a blowout hole for blowing air at an angle of about 45 degrees are formed in the cylinder 32 of the blowing means 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backwind yarn processing apparatus for processing a backwind yarn wound on a wound body.

[0002]

2. Description of the Related Art Conventionally, as a device for catching and cutting a backwind yarn wound on a spinning bobbin while a spinning bobbin formed by a spinning machine is being conveyed to a winder, a blade having a predetermined shape is spun. There is known a device that catches and cuts a backwind yarn by contacting the surface of a bobbin.

[0003]

However, in such a conventional backwind yarn processing apparatus, even if the blade portion is brought into contact with the surface of the spinning bobbin, the backwind yarn cannot be captured or the backwind yarn cannot be captured. In some cases, the parent yarn was also caught, and it was not possible to reliably capture and cut only the backwind yarn.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a backwind yarn processing apparatus capable of reliably catching and cutting only a backwind yarn wound around a yarn winding body such as a spinning bobbin. Is to provide.

[0005]

According to one aspect of the present invention, there is provided an apparatus for processing a backwind yarn wound on a bobbin, the apparatus being located at a backwind yarn processing position. A backwind yarn processing device having an air blowing means for blowing air onto the wound body. In this invention, the backwind yarn wound around the bobbin can be lifted from the parent yarn by blowing air onto the bobbin.

According to a second aspect of the present invention, the air blowing means has a plurality of outlets for blowing air in a plurality of different directions. In the present invention, since the air blowing means has a plurality of outlets for blowing air in a plurality of different directions, it is possible to surely process the backwind yarn even for yarns having different lengths.

According to a third aspect of the present invention, there is provided a rotating device for rotating a bobbin at a backwind yarn processing position around an axis, and a regulating member for receiving a yarn blown by air at one end of the bobbin. Shall have. According to the present invention, by blowing air toward the regulating member while rotating the bobbin by the rotating means, it is possible to wind the yarn end around one end of the bobbin after cutting the backwind yarn.

According to a fourth aspect of the present invention, the regulating member is a holding member for holding one end of the bobbin at the backwind yarn processing position. According to the present invention, by pressing one end of the bobbin with the pressing member, the bobbin is prevented from swinging during rotation, and the backwind yarn can be reliably caught and cut without damaging the parent yarn.

According to a fifth aspect of the present invention, the pressing surface of the pressing member has a portion which is larger than one end surface of the bobbin and is gradually depressed toward the center.
According to the present invention, the portion of the pressing surface of the pressing member that protrudes from the upper end of the bobbin can receive the yarn blown by air. Further, one end of the bobbin can be accurately positioned at the center along the depression of the pressing surface.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited to the embodiments without departing from the spirit of the present invention. In this specification, the front means the front side of the paper of FIG. 1, the rear means the back side of the paper of FIG. 1, the right means the right side of FIG. 1, the left means the left side of the figure, and the upper means 1 means the lower side of the figure.

First, the direction in which a spinning bobbin (thread wound body) p containing a backwind yarn y is formed will be described. In the spinning machine, the spinning bobbin p is formed by winding the yarn while being traversed from the lower part to the upper part of the tube b by the building motion of the ring rail (hereinafter, the spinning bobbin by the ring rail building motion). Is referred to as a “parent thread”). After the parent yarn is wound up to the top of the tube b, the ring rail is lowered at a high speed, the backwind yarn y is spirally wound around the surface of the yarn layer of the parent yarn, and then the bottom bunch w1 is placed at the root of the tube b. Form. The spinning bobbin p having the backwind yarn y and the bottom bunch w1 formed as described above is inserted into the peg of the tray t and stands up (in a state where the axial direction is directed in the up-down direction). Conveyed above.

The backwind yarn processing device 2 is provided with a backwind yarn processing position A on a conveying means T such as a belt conveyor.
Of the spinning bobbin p is processed with the backwind yarn y. The transport means T connects between the supply section of the spinning bobbin p and the winder. The bunch winding processing position B is located upstream of the backwind yarn processing position A, and the tapping processing position is located downstream (see the drawing). (Abbreviation). With such a configuration, the spinning bobbin p is supplied to the winder in a state where the yarn end is easily taken out after the predetermined processing is performed at each processing position.

The bunch winding device removes the bottom bunch w1 formed at the root of the tube b of the spinning bobbin p.
Is cut by a rotary blade while rotating in the unwinding direction (the direction opposite to the winding direction) to remove the bottom bunch w1. The spinning bobbin p at the bunch winding processing position B has its head regulated by two regulating plates 11 from front and rear. This restriction plate 11 is located at the bunch winding position B
It further extends to the right (upstream side), and the distance between the two regulating plates 11 gradually widens back and forth at the right end. This is because the spinning bobbin p on the tray t is reliably guided to the bunch winding processing position B, and the head of the spinning bobbin p swings when a discriminating device (not shown) discriminates between the actual bobbin and the empty bobbin. It is to regulate. Note that, instead of the two regulating plates 11, the upper end of the spinning bobbin p at the bunch winding processing position B is held by a bobbin holding device 4 described later.
May be held down by the holding member 41.

Next, the bobbin pressing device 4 included in the backwind yarn processing device 2 will be described. The bobbin pressing device 4 has a pressing member 41 that presses the upper end of the spinning bobbin p that stands upright with the axial direction of the spinning bobbin p at the backwind yarn processing position A. The pressing member 41 is vertically movable by a cylinder 43 vertically mounted on a frame 42 and is horizontally rotatable with respect to a reciprocating rod 44 of the cylinder 43. The holding member 41 and the tube b of the spinning bobbin p are both made of resin, and the holding member 41 is made softer to reduce the degree of wear of the tubes b used in large numbers. With such a configuration, the holding member 4
1 can be lowered from above (directly above) the spinning bobbin p, and the spinning bobbin p can be pressed from above. In a state where the spinning bobbin p is pressed, the pressing member 41 can rotate.

The cylinder 43 is a pneumatic cylinder with a built-in spring, and the reciprocating rod 44 projects (downs) by the biasing force of the spring and retreats (ups) by the pressure of air. Thus, the upper end of the spinning bobbin p can be pressed by the pressing member 41 with an appropriate force without using a regulator. The advance / retreat stroke of the cylinder 43 is set such that the pressing member 41 can press the upper end of the spinning bobbin p of all lengths, and the pressing member 41 at the uppermost position does not interfere with the spinning bobbin p. ing.

The holding member 41 has an umbrella-like shape that is circular in plan view. Holding member 41 having a circular outer shape
The lower surface (pressing surface) of is larger than the upper end surface of the spinning bobbin p and is tapered toward the center point, so that when the spinning bobbin p is pressed, the upper end of the spinning bobbin p To be covered. The holding member 41 not only presses the upper end of the spinning bobbin p in order to prevent the rotating spinning bobbin p from swinging, but also serves as a regulating member for receiving a yarn end blown by air at the upper end of the spinning bobbin p. Also works.

The holding member 41 has a structure as shown in FIG. The mounting structure of the pressing member 41 includes a connecting member 45 screwed into the distal end portion 44a of the advance / retreat rod 44, and two bearing members 46, 46 fitted outside the connecting member 45.
A mounting member 47 for attaching the two bearing members 46, 46 to the connecting member 45, and two mounting members 46, 46
And a support member 48 fitted to the outside of the mounting member 47 and having a flange portion. With such a configuration, the holding member 41 screwed to the flange portion of the support member 48 at three places allows the advance / retreat rod 44 via the bearing member 46.
Is horizontally rotatable.

The backwind yarn processing device 2 includes a spinning bobbin p at a backwind yarn processing position A on the conveying means T.
Is rotated in the winding direction (the same direction as the winding) to capture and cut the backwind yarn y.
The spinning bobbin p at the backwind yarn processing position A
The processing of the backwind yarn y is performed in the same state as during conveyance, that is, in a state where the axial direction is oriented in the vertical direction.

The backwind yarn processing device 2 has three rollers 21 to 23 that can abut on the outer peripheral portion of the tray t at the backwind yarn processing position A as stop / positioning means for the spinning bobbin p. I have. One roller 21 is a drive roller directly connected to an output shaft of a motor (not shown). By rotating this roller 21, the spinning bobbin p is rotated together with the tray t at the backwind yarn processing position A. Can be. In addition, by appropriately moving the three rollers 21 to 23, the tray t can be stopped at the backwind yarn processing position A, positioned at that position, and further cut out from that position.
Thus, the tray t is formed by the three rollers 21 to 23.
Is held at three points, the tray t can be reliably held at a fixed position during rotation, and the rotation of the tray t and the spinning bobbin p is stabilized by cooperation with the pressing member 41 of the bobbin pressing device 4. Can be done.

The backwind yarn processing device 2 is set up at one side of the tray transport path (the rear side of the tray t at the backwind yarn processing position A) in parallel with a predetermined interval in the front-rear direction. A sliding member 26 that can move up and down along the columns 24 by the two columns 24 and the cylinder 25.
And At the tray side (front side) end of the sliding member 26, a column 24 closer to the tray t penetrates, and a cylindrical member 27 rotatable around the column 24 is attached. This cylindrical member 27 has a vertical plate-like blade mounting member 2.
8 has one end attached thereto, and by projecting a reciprocating rod 30 of a cylinder 29 attached to the sliding member 26, the cylindrical member 27 is rotated and the blade attaching member 2 is rotated.
8 can be pressed to contact the rear surface of the spinning bobbin p. Conversely, by retracting the advance / retreat rod 30 of the cylinder 29, the cylinder member 27 can be rotated in the opposite direction, and the blade attachment member 28 can be pulled away from the spinning bobbin p.

In the vicinity of the tip of the blade mounting member 28, a blade 28a of a predetermined shape for catching and cutting the backwind yarn y on the spinning bobbin p is formed so as to slightly project toward the spinning bobbin p. ing.

The backwind yarn processing device 2 is provided at the lower side of the spinning bobbin at the backwind yarn processing position A, which is provided on the other side of the tray transport path (in front of the tray t at the backwind yarn processing position A). Air blowing means 31 for blowing air obliquely upward from a slightly forward direction toward the bobbin
Having. A detecting means (not shown) for detecting arrival of the tray T is provided at the backwind yarn processing position A.
As soon as the arrival of the tray T is detected by the detection means, the air blowing means 31 is activated. By the air of the air blowing means 31, the backwind yarn y can be slightly lifted from the parent yarn to make it easier to catch and cut the backwind yarn y.

The air blowing means 31 is connected to one side of the cylindrical body 32 disposed slightly forward of the lower part of the spinning bobbin at the backwind yarn processing position A with the axial center directed in the left-right direction. And an air tube 34 connected to an air source (not shown). Cylinder 3
2 is slightly shorter than the maximum width of the spinning bobbin p. On the peripheral side surface of the cylindrical body 32, there are three blown air obliquely upward toward the rear spinning bobbin p. Outlet holes (outlet ports) 35 and 36 are formed. The two blowout holes 35 on the left and right sides blow air at an angle of about 15 degrees with respect to the axial direction (vertical direction) of the spinning bobbin p (about 75 degrees with respect to the horizontal direction). Air outlet 35
The air outlet 36 located on the middle line of (1) blows air at an angle of about 45 degrees with respect to the axial direction (vertical direction) of the spinning bobbin p (at an angle of about 45 degrees with respect to the horizontal direction). It has become. With such a configuration, air from the air source is supplied into the cylindrical body 32 via the air tube 34 and the air joint 33, and is blown to the spinning bobbin p through the blowing holes 35 and 36. In addition, the blowing holes 35, 36
Is formed on the peripheral side surface of the cylindrical body 32, so that air having an appropriate pressure can be blown to the spinning bobbin p regardless of the air pressure supplied in the axial direction from the inlet of the cylindrical body 32. .

Next, the operation of the backwind yarn processing device 2 configured as described above will be described. First, when the tray t on which the spinning bobbin p is placed is stopped at the backwind yarn processing position A, the pressing member 41 of the bobbin pressing device 4 is lowered by the cylinder 43 by the urging force of the spring, and the spinning bobbin is stopped. The upper end of p is pressed from above and the air blowing means 31 is operated. Thereby, when the spinning bobbin p is not properly inserted into the peg of the tray t, it is inserted to the bottom and the upper end of the spinning bobbin p is positioned at the center along the tapered surface of the lower surface of the holding member 41. You.

Thereafter, while being held down by the holding member 41,
The spinning bobbin p is rotated by rotating the roller 21, and the blade 28 a of the blade attaching member 28 is rotated by the spinning bobbin p.
Move up and down while making contact with the surface of. Thus, the backwind yarn y of the spinning bobbin p is caught and cut by the blade portion 28a. At this time, the backwind yarn y is slightly lifted from the surface of the parent yarn by the air from the air blowing means 31, so that the backwind yarn y can be reliably captured. In addition, since the upper end of the spinning bobbin p is positioned by the holding member 41, the spinning bobbin p rotates without swinging, and the blade portion 28a reliably captures and captures the backwind yarn y without damaging the parent yarn.
Can be cut. Further, since the pressing member 41 also rotates in the horizontal plane in response to the rotation of the spinning bobbin p, wear and damage of the upper end of the spinning bobbin p and the lower surface of the pressing member 41 can be prevented as much as possible.

As shown by the dashed line in FIG. 6, the air from the air blowing means 31 rises along the surface of the spinning bobbin p. Due to this flow of air, the cut yarn end rises, is received by the lower surface of the pressing member 41 at the upper end of the bobbin, and is wound around the bobbin head. The lower surface of the holding member 41 is larger than the upper end of the bobbin and is tapered toward the center point, and the air from the three blowout holes 35 and 36 of the cylindrical body 32 rises so as to surround the spinning bobbin p. The yarn end lifted by air is easily wound around the bobbin head. When the yarn end is wound around the bobbin head in this manner, it can be easily taken out in the post-processing step.

Also, since air is blown from the cylindrical body 32 in two directions at different angles with respect to the horizontal, the blow holes 3
5 is for a long bobbin, the outlet 36 is for a short bobbin,
Reliable backwind yarn processing can be performed on long and short bobbins. Further, the spouting hole 36 can correspond to a spinning bobbin p in which the yarn is wound only at the lower part.

In this embodiment, the blade mounting member 28 is brought into contact with the spinning bobbin p at the backwind yarn processing position A from the rear, and air is blown by the air blowing means 31 from the front. However, the air may be sprayed from the same side (rear) as the blade mounting member 28.

In the present embodiment, the holding member 41
Also serves as a “holding member” and a “regulating member” in the claims, but separately from the holding member 41, a spinning bobbin p.
A restricting member for receiving the yarn end blown by air may be provided at the upper end.

[0030]

The present invention is configured as described above.
The following effects are obtained. According to the first aspect of the present invention, by blowing air onto the bobbin to lift the backwind yarn from the parent yarn, only the backwind yarn can be reliably captured.

According to the second aspect of the present invention, since the air blowing means has a plurality of air outlets for blowing air in a plurality of different directions, for example, without moving the cylindrical body having the air outlet formed therein, It is possible to cope with a wound body in which the length of the yarn and the length of the portion where the yarn is wound are different.

According to the third aspect of the present invention, by blowing air toward the regulating member while the bobbin is rotated, the end of the bobbin can be wound around one end of the bobbin after cutting, and the post-process can be performed. The end of the yarn can be easily taken out.

According to the fourth aspect of the present invention, by holding the holding member, the swinging movement of the wound body during rotation can be prevented, and the backwind yarn can be reliably caught and cut without damaging the parent yarn. it can.

According to the fifth aspect of the present invention, by pressing with the pressing member, one end of the bobbin can be accurately positioned, and the cut yarn end can be securely wound around one end of the bobbin.

[Brief description of the drawings]

FIG. 1 is a front view showing a bobbin pressing device according to the present embodiment.

FIG. 2 is a side view showing the vicinity of a backwind yarn processing position.

FIG. 3 is a partially enlarged perspective view of the backwind yarn processing device.

FIG. 4 is a plan view showing an operation mechanism of a blade attachment member.

FIG. 5 is a cross-sectional view showing a mounting structure of a pressing member.

FIG. 6 is an explanatory diagram showing the flow of air from the blowing means and its operation.

FIG. 7 is an enlarged perspective view showing the spraying means.

[Explanation of symbols]

A: Backwind yarn processing position, p: Spinning bobbin (thread wound), t: Tray, y: Backwind yarn, 2 ... Backwind yarn processing device, 4 ... Thread wound holding device, 31: Air blowing means, 32 ... cylindrical body, 33 ... air joint, 34
... air tube, 41 ... holding member (regulating member), 43
... Cylinder, 44 ... Advancing and retracting rod

Claims (5)

[Claims] 1. A backwind yarn processing device for processing a backwind yarn wound on a bobbin, comprising an air blowing means for blowing air to a bobbin at a backwind yarn processing position. 2. The backwind yarn processing apparatus according to claim 1, wherein the air blowing means has a plurality of outlets for blowing air in a plurality of different directions. 3. A rotating means for rotating a bobbin at a backwind yarn processing position around an axis, and a regulating member for receiving a yarn blown by air at one end of the bobbin. A backwind yarn processing apparatus as described in the above. 4. The restricting member is a pressing member for pressing one end of a bobbin at a backwind yarn processing position.
A backwind yarn processing apparatus as described in the above. 5. The backwind yarn processing apparatus according to claim 4, wherein the pressing surface of the pressing member has a portion which is larger than one end surface of the bobbin and is gradually depressed toward the center.