JPH078700B2 - Yarn suction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention, when performing a yarn splicing operation or a yarn hooking operation in a spinning machine, sucks a yarn from a yarn supplying section and conveys it to a yarn processing section. And a yarn suction device.

(Prior Art) Generally, a yarn spun from a yarn forming device in a binding spinning machine is sucked by a yarn suction device as shown in FIGS. 3 and 4, and a yarn hooking mechanism or a yarn splicing mechanism is used. For example, a yarn is carried on a bobbin that is conveyed to a yarn processing unit and is mounted on a winding device, or a yarn splicing operation with a yarn drawn from a winding package is performed.

The yarn suction device used in the yarn processing operation described above has a slit 21a formed along the longitudinal direction,
An arc-shaped suction pipe 21 attached to the frame body, a pipe 22 for connecting the pipe and a negative pressure source, and a negative pressure control valve 23 provided at a connecting portion of the suction pipe, and the suction port thereof. Is located at the spinning portion of the yarn forming device 24. Further, the yarn processing unit 25 such as a yarn hooking mechanism and a yarn splicing mechanism is installed at a position closer to the pipe than the line connecting the suction port 21b of the suction pipe 21 and the slit end 21c on the negative pressure control valve side.

In such a device, when a yarn is spun from the yarn forming device 24, the negative pressure control valve 23 is fully opened and sucked so that a high negative pressure acts on the suction pipe 21. At this time, the yarn sucked by the suction pipe 21 has a large suction force, and therefore travels in the substantially central portion of the pipe together with suction air. In this state, the negative pressure control valve 23 is operated to reduce the opening degree and suction pipe 21.
When the inside is in a state of low negative pressure, the suction force in the suction pipe 21 becomes smaller than the suction force on the negative pressure source side, and the yarn running in the center of the pipe is in the longitudinal direction of the pipe. It moves in a parallel direction, goes out of the pipe through the slit 21a, and is engaged with the yarn processing section 25. On the other hand, the yarn drawn out by the movable suction pipe (not shown) from the package of the winding device is conveyed to the yarn processing section 25, and the yarn joining operation is performed.

(Problems to be Solved by the Invention) In the yarn suction device as described above, since the yarn is held by the suction air in the arc-shaped suction pipe, a suction pipe having a large diameter is used and a negative pressure source There is a problem that the yarn cannot be held in the tube under high negative pressure unless the holding force of the yarn by the sucked air in the tube is larger than the suction force. There is a problem that the yarn that has come out of the pipe cannot be reliably engaged with the yarn processing section.

The present invention solves the problems as described above, and even if there is an obstacle in the yarn conveying path, the yarn can be reliably and smoothly conveyed from the yarn supplying unit to the yarn processing unit, Moreover, the present invention provides a yarn suction device that can make the structure of the suction pipe driving device compact and that can smoothly carry the yarn.

(Means for Solving Problems) In order to solve the above-mentioned problems, a yarn suction device of the present invention includes a suction pipe that sucks a yarn from a yarn supply unit and conveys the yarn to a yarn processing unit, and the suction pipe. In a yarn suction device including a drive device that rotates a pipe, the suction pipe includes a first suction pipe that is provided with a slit along the length of the pipe, and is rotatably mounted on a frame body. A second suction pipe connected to a pressure source and rotatably mounted on the frame so that the suction port moves between the outlet of the first suction pipe and the yarn processing unit. There is.

(Example) The structure of the yarn suction device of the present invention will be described with reference to the drawings.

Reference numeral 1 is a drafting device for drafting and supplying the fiber bundle, and reference numeral 2 is a yarn forming device for forming the supplied fiber bundle into a spun yarn by a false twist nozzle, a rotating rotor, or the like. 3 is a take-up roller for sending the spun yarn to the winding device at a constant speed, 4 is running along the machine base,
A yarn processing machine that performs operations such as yarn splicing and thread hooking. 5
Is a frame that forms the yarn processing machine 4, has wheels (not shown) mounted on the lower part, and is adapted to run along rails (not shown) installed parallel to the machine base. ing. 6
Is a first suction pipe, which is a pipe having a round or rectangular cross section, is rotatably mounted on the frame body 5, is rotated by the drive device 7, and is spun from the yarn forming device 2. It is designed to suck yarn. Further, the first suction pipe 6 is provided with a slit 6a along the longitudinal direction of the pipe so as to be located on the rotation trajectory of the second suction pipe 8, and the yarn is held by suction air during the suction operation. When the second suction pipe 8 is rotated, the second suction pipe 8 moves in a direction parallel to the longitudinal direction of the pipe and passes through the slit 6a to come out of the pipe. One end of the second suction pipe 8 is connected to the negative pressure source, and the second suction pipe 8 is rotated by the drive device 9 during the yarn processing operation so that the suction port is connected to the outlet of the first suction pipe 6. Then, when the yarn is sucked, it is attached to the frame body 5 in a state in which the rotation axis is inclined so as to rotate to the yarn processing section. The above-mentioned driving devices 7 and 9 are those in which the output shaft of the fluid cylinder rotates forward and reverse to rotate the suction pipe, or those in which the suction pipe is rotated by an electric motor and a rack and pinion. Reference numeral 10 denotes a yarn splicing device, which is arranged within the rotation path of the second suction pipe 8. Reference numeral 11 denotes a yarn suction reservoir, which is installed between the first suction pipe 6 and the yarn splicing device 10 so as to suck and hold the yarn spun from the yarn forming device 2 during the yarn splicing operation. Has become.

When the yarn processing machine as described above runs along the machine base and detects the yarn breakage weight, it stops at a predetermined yarn splicing operation position. First, the driving device 7 is actuated, the first suction pipe 6 is rotated, and the suction port thereof moves to the spinning portion of the yarn forming device 2.
Next, the drive device 9 is operated to rotate the second suction pipe 8, and the suction port thereof is moved to the outlet of the first suction pipe 6. When the draft device 1 is operated in such a state and the yarn is spun from the yarn forming device 2, the yarn is transferred to the first suction pipe 6
Is sucked into the second suction pipe 8 via. Next, when the driving device 9 is operated and the second suction pipe 8 is rotated to the lower standby position, the yarn running in the first suction pipe 6 while being held by the suction air is the length of the pipe. It moves in a direction parallel to the direction, goes out of the pipe through the slit 6a, and is engaged with the suction reservoir 11 and the yarn joining device 9. That is, the drive device 7 operates to return the first suction pipe 6 to the standby position where the first suction pipe 6 is rotated. On the other hand, the yarn is pulled out from the package of the winding device (not shown), and another suction pipe (not shown)
Is sucked by and conveyed to the yarn splicing device 10, and the yarn splicing operation is performed.

When the yarn spun from the yarn forming device is hooked on the bobbin attached to the winding device, the first suction pipe 6 and the second suction pipe 6 are used as in the case of the yarn splicing operation described above. 8 is rotated to suck the yarn spun from the yarn forming device 2, conveyed to the yarn hooking mechanism (not shown) by the second suction pipe 8, and attached to the winding device (not shown). Thread the thread on the bobbin.

(Effect of the Invention) The yarn suction device of the present invention comprises a suction pipe that sucks a yarn from the yarn supply unit and conveys the yarn to the yarn processing unit, and a yarn suction device that rotates the suction pipe. In the device,
The suction pipe has a slit formed along the length of the pipe, is connected to a first suction pipe rotatably mounted on a frame, and is connected to a negative pressure source, and a suction port is an outlet of the first suction pipe. Since the second suction pipe is rotatably mounted on the frame so as to move between the section and the yarn processing section, the following effects can be obtained.

(1) Since the suction pipe is composed of two rotatable suction pipes, even if there is an obstacle or the like in the yarn transport path, the yarn can be reliably transported to a predetermined yarn processing section. be able to.

(2) Since the suction pipe is composed of two rotatable suction pipes and the pipe does not have an expansion / contraction mechanism as in the conventional example, the structure of the drive device can be made compact and the yarn can be used. Can be smoothly carried out.

[Brief description of drawings]

FIG. 1 is a schematic front view showing one embodiment of the yarn suction device of the present invention, and FIG. 2 is a side view thereof. FIG. 3 FIG. 4 is a schematic view showing one embodiment of a conventional yarn suction device. 1: Draft device, 2: Yarn forming device 4: Yarn processing machine, 5: Frame 6: First suction pipe, 6a: Slit 7,9: Drive device, 8: Second suction pipe 10: Yarn splicing device , 11: Suction reservoir

 ─────────────────────────────────────────────────── ─── Continuation of front page Examiner Masato Matsunawa (56) References Japanese Patent Publication Sho 59-38327 (JP, B2)

Claims (1)

[Claims] 1. A yarn suction device comprising a suction pipe for sucking a yarn from a yarn supply unit and transporting the yarn to a yarn processing unit, and a drive device for rotating the suction pipe, wherein the suction pipe is A slit is provided along the length of the pipe, is connected to a first suction pipe rotatably mounted on a frame, and is connected to a negative pressure source, and a suction port is provided at the outlet of the first suction pipe and the yarn. A yarn suction device comprising a second suction pipe rotatably mounted on the frame so as to move between the processing unit and the processing unit.