JPH0449186Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a yarn suction tube used in yarn splicing machines, doffing machines, etc. of textile machines. This invention relates to an improvement of an L-shaped yarn suction tube for suctioning yarn.

(Prior Art) Generally, when forming a spun yarn from a staple fiber bundle, a spinning machine as shown in FIG. 3 is used.

That is, this spinning machine includes a draft mechanism (not shown) such as a roller part that drafts a staple fiber bundle, a yarn forming mechanism 31 that forms the drafted staple fiber bundle into a spun yarn, and a yarn forming mechanism 31 that forms the drafted staple fiber bundle into a spun yarn. A take-up mechanism 32 that sends out the spun yarn spun by the mechanism 31, a detector 33 that detects yarn breakage, a suction storage means 34 that suctions and stores the yarn during splicing or winding operations, and A take-up roller 3 rotates at a predetermined circumference while traversing
5 and the winding roller 3 with the bobbin rotatably attached.
5 and the cradle 36 which is brought into contact with a predetermined surface pressure are installed in the above-mentioned order to form one spindle of a spinning unit, and a plurality of spindles of spinning units are arranged in the front-rear direction in the figure. .

In order to automatically perform a yarn splicing operation when a yarn breakage occurs in the above-described spinning machine, a yarn splicing machine 41 that runs in the front-rear direction in the figure is installed.

The yarn splicer 41 is configured such that the suction port moves about 130 degrees between a suction position (a position indicated by a two-dot chain line in the figure) close to the lower side of the take-up mechanism 32 and a standby position (a position indicated by a solid line in the figure) below the yarn splicer 45 in 1 to 3 seconds.
an upper thread suction means 43 rotatably attached to the
The machine frame 42 is arranged so that the suction port moves about 120 degrees between a suction position (a position indicated by a two-dot chain line in the figure) close to the periphery of the winding package 37 of the cradle 36 and a standby position (a position indicated by a solid line in the figure) below the yarn splicer 45 in 1 to 3 seconds.
a lower thread suction means 44 rotatably attached to the
The machine is provided with a yarn splicer 45 which splices together the upper yarn from the take-up mechanism 32 and the lower yarn from the winding package 37, a scooping means 46 which is rotatably attached to the machine frame 42 so as to hold the yarn being sucked into the lower yarn suction means 44 and transport it to the yarn splicing operation section of the yarn splicer 45, and a roller driving means 47 which comes into contact with the winding roller 35 of the yarn splicing operation spindle and rotates it in the reverse direction.

As shown in FIG. 4, the above-mentioned needle thread suction means 43 includes a downstream pipe 51 which is rotatably attached to the machine frame 42 by a bearing, and an upstream pipe which is a curved or straight pipe as shown by a chain line. Side pipe 52 and downstream pipe 51
and a metal fitting 53 that connects the upstream pipe 52 in an L-shape, and a guide 5 is provided at the end of the upstream pipe 52.
4 has a structure in which an orifice 55 for adjusting the suction force is attached to the straight pipe portion.

Further, downstream of the downstream pipe 51, an exhaust port 56a is provided.
The waist box 5 has a wire mesh 56b attached to it.
6, and an intake fan 5 connected to the exhaust port 56a.
7 to form a yarn collecting device.
1, and is installed at the end of the downstream tube 51 of the above-mentioned upper thread suction means 43 and the lower thread suction means 44.
The ends of the waist boxes 56 are reversibly connected to the waist boxes 56, respectively.

The dimensions of the above-mentioned downstream pipe 51 are an outer diameter of 30 mm, an inner diameter of 20 mm, and a total length of approximately 380 mm.
The dimensions are outer diameter 20mm, inner diameter 16mm, total length approximately 325mm.
mm.

Upper thread suction means 43 and lower thread suction means 44
When the suction fan 57 is in use, the suction fan 57 is operated, and after separating and collecting the yarn suctioned from each suction means 43 and 44 in the waist box 56,
Only air is exhausted from the

When yarn breakage occurs on the upstream side or downstream side of the take-up mechanism 32 of the above-mentioned spinning machine, the detector 45
detects this and gives a movement command to the yarn splicing machine 41, and the yarn splicing machine 41 moves to the yarn cutting weight and stops at the yarn splicing operation position. Then, the yarn splicing operation is performed according to the sequence of operations shown in FIG. First, in order to suction the upper thread, the upper thread suction means 43 is rotated clockwise and the suction port is moved to the suction position below the take-up mechanism 32.

The center of rotation of the upper thread suction means 43 is the downstream pipe 51 in FIG. 4, and the state changes from the solid line position in FIG. 3 to the two-dot chain line position.

Simultaneously with the above-mentioned operation, in order to suction the bobbin thread, the bobbin thread suction means 44 rotates counterclockwise to move the suction port to the suction position above the winding package 37, and the roller drive means 47 moves to the winding position. The roller 35 and the take-up package 37 are rotated in the opposite direction by contacting the take-up roller 35 (FIG. 5-1).

Then, the bobbin thread suction means 44
When the lower thread opening is suctioned from 7, the suction opening rotates approximately 120 degrees and returns to the standby position below the thread splicer 45 (Fig. 5-5-2).

Next, the needle thread suction means 43 rotates counterclockwise, and the suction port returns to the standby position below the thread splicer 45, so that the needle thread I sent out from the take-up mechanism 32 is transferred to the thread splicer 45. (Fig. 5-5-3).

Note that the upper thread suction means 43 and the lower thread suction means 44 in the above state are at the solid line positions in FIG. 3.

Next, the scooping means 46 rotates from below to above, scoops up the bobbin thread being sucked by the bobbin thread suction means 44, and conveys it so that the thread path passes through the thread splicing operation section of the thread splicer 45. Then, the thread splicer 45 is operated and the upper thread A and the lower thread B are spliced. At this time, since the running of the yarn is momentarily stopped, the yarn continuously sent out from the take-up mechanism 32 is stored in the suction storage means 34 (FIG. 5-5).

When the yarn splicing operation is completed, the scooping means 46 and the roller driving means 47 simultaneously return to the standby position, the winding roller 37 rotates forward, and the spliced yarn is wound onto the winding package 37. (Figure 5-5).

(Problem to be solved by the invention) In the yarn suction tube used as the upper yarn suction means 43 of the yarn splicing machine 41 as described above, at the connection intersection 52a of the downstream tube 51 and the upstream tube 52, The yarn is bent and travels in contact with the inner wall surface of the pipe, increasing the running resistance and reducing the yarn tension on the upstream side, which impedes yarn processing operations.

In addition, when the yarn comes into contact with the inner wall surface of the tube, the yarn causes displacement in the longitudinal direction between single yarns, and the displaced single yarns form a loop and further contact the inner wall surface of the tube and intermittently apply the tension of the suction yarn. This causes abnormalities in yarn processing operations.

Further, when a restricting orifice 55 is provided in the straight pipe portion of the upstream pipe 52 to adjust the suction force, there is a problem in that the yarn gets caught in that part and causes clogging in the pipe.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a yarn suction tube that has low running resistance and allows easy adjustment of suction force.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the yarn suction tube of the present invention includes a downstream tube rotatably supported in the circumferential direction, and a downstream tube that is perpendicular to the downstream tube. In a yarn suction tube consisting of an upstream tube connected and fixed in an L-shape, the tip of the upstream tube projects into the downstream tube, and the upstream tube and the upstream tube are connected to the downstream tube. The gist is that pins for adjusting the suction force that can come out and go out are attached to opposing positions.

(Example) The structure of the yarn suction tube of the present invention is shown in Figures 1 and 2.
This will be explained based on the diagram.

Reference numeral 1 denotes a bracket formed on the machine base, on which the downstream tube 2 is attached via a bearing 8 so as to be rotatable in the circumferential direction of the tube 2. A pipe 11 for connecting to a vacuum pump (not shown) is attached to one end of the downstream tube 2, and a connecting fitting 3 is attached to the other end. Further, the downstream pipe 2 is connected to the arm 12
It is connected to a drive device (not shown) via a screwdriver, so that it can be rotated by a predetermined angle in forward and reverse directions. 4 is an upstream pipe, and a guide 5 is attached to one end and a guide 6 is attached to the other end.
Furthermore, when the upstream pipe 6 is curved as in the embodiment, a cut is made at the center of the curve and the guide 7 is mounted thereon. The above-mentioned guide 5 is attached to the metal fitting 3 so that its tip protrudes into the downstream pipe 2. 9 is a pin for adjusting the suction force;
It is attached to the metal fitting 3 at a position facing the outlet 5a of the guide 5 with a screw 10. The pin 9
When the tip 9a is brought closer to the outlet 5a of the guide 5, the suction force of the upstream tube 4 becomes smaller, and when it is moved away, the suction force of the upstream tube 4 becomes larger.

When the above-described yarn suction tube is used as the upper yarn suction means 43 of the yarn splicing machine 41 shown in FIG. 3 and the suction fan 57 is operated, a suction force is applied to the upstream tube 4 and the downstream tube 2. do. In this state, the screw 10 is loosened to allow the pin 9 to protrude and retract, thereby adjusting the suction force required by the upstream tube 4 for the suction operation. Next, when a drive device (not shown) is activated, the upstream tube 4 is rotated together with the downstream tube 2, and the yarn is sucked from the guide 6. The yarn sucked from the guide 6 moves within the upstream tube 4 while contacting the guide 7 and the guide 5. When the yarn is sent out from the outlet 5a of the guide 5 into the downstream tube 2, it comes into contact with the tip 9a of the pin 9, and is then sucked into the downstream tube 2 by the large suction force of the vacuum pump. Therefore, the yarn is separated from the tube wall of the downstream tube 2 by the amount by which the guide 5 protrudes, so that running resistance is reduced and the yarn runs smoothly. In addition, since the downstream tube 2 is provided with a pin 9 for adjusting the suction force, and its position is opposite to the outlet port 5a, which is a protrusion of the upstream tube 4, the yarn does not get entangled with the pin 9. Furthermore, the pin 9 allows the suction force to be easily set to an appropriate value. When the yarn is sucked in this way, a drive device (not shown) is activated, and the downstream pipe 2
At the same time, the upstream pipe 4 is rotated to connect the yarn to the yarn splicer 45.
conveyed to the thread splicing operation section.

(Effect of the invention) The yarn suction pipe according to the invention includes a downstream pipe rotatably supported in the circumferential direction, and an upstream pipe connected and fixed in an L-shape orthogonally to the downstream pipe. In the yarn suction tube, the tip of the upstream tube projects into the downstream tube, and a suction force adjusting pin is retractable from the downstream tube at a position facing the upstream tube. Because the configuration is equipped with
It exhibits the excellent effects described below.

(1) At the L-shaped bend, the upstream tube protrudes into the downstream tube, so the yarn running inside the tube hardly comes into contact with the tube wall surface, reducing running resistance. In addition, since the yarn does not run in contact with the tube wall surface, loops are not formed in the yarn due to positional deviations between single yarns that occur when intermittent contact with the tube wall occurs, and intermittent tension fluctuations occur in the suction yarn. does not occur. Therefore, the loss of tension in the yarn in the yarn suction tube is reduced and tension fluctuations are eliminated.

(2) In addition, since the suction force adjustment pin provided on the downstream tube is located opposite the outlet, which is a protruding part of the upstream tube, the yarn gets caught on the pin and gets tangled inside the tube. There is no yarn clogging, and the suction force can be easily set to an appropriate value using the pin.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view showing one embodiment of a yarn suction device using the yarn suction tube of the present invention. FIG. 2 is a view taken along the arrow 2 in FIG. 1. FIG. 3 is a side view showing an embodiment of a yarn splicing section of a conventional spinning machine. FIG. 4 is an enlarged sectional view taken along the - arrow in FIG. 3. FIG. 5 is a schematic diagram showing the yarn splicing operation of the yarn splicing machine of FIG. 3. Explanation of symbols in the drawings: 1...bracket, 2...
...Downstream pipe, 3...Connection fitting, 4...Upstream pipe, 5, 6, 7...Guide, 9...Pin, 16a
...connected intersection.

Claims (1)

[Scope of Claim for Utility Model Registration] In a yarn suction tube consisting of a downstream tube rotatably supported in the circumferential direction and an upstream tube connected and fixed in an L-shape orthogonal to the downstream tube. The distal end of the upstream tube is made to protrude into the downstream tube, and the downstream tube is equipped with a retractable suction force adjustment pin at a position facing the upstream tube. Characteristic yarn suction tube.