JPH048525B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This application applies to spinning machines, twisting machines, etc. (hereinafter referred to as spinning machines).
The present invention relates to a method for cutting the tail thread at the time of so-called simultaneous tube change, in which a full bobbin that has become full on a spindle and a new empty bobbin are simultaneously exchanged over all spindles.

BACKGROUND TECHNOLOGY Conventionally, the tail threads of a spinning machine equipped with a simultaneous pipe changing device are cut in the following manner. A tail thread spool is provided below the bobbin insertion part of each spindle, and the spinning machine is stopped by the full bobbin signal, and the ring rail is lowered from the winding position during inertia rotation, and the tail thread connected to the full bobbin is removed from the tail thread. After winding the thread onto the spool, the full bobbin is doffed from the top of the spindle by operating the pipe changing device all at once, and the thread connected between the tail thread spool and the full bobbin is pulled out and cut. After inserting an empty bobbin into the spinning machine, the spinning machine is restarted while raising the ring rail from the lowest position to the winding start position, so that the spun yarn connected to the roller part can be continuously wound onto a full bobbin. ing.

As mentioned above, the cutting of the tail thread in the conventional simultaneous pipe change requires a special spindle with a tail thread spool, and each time the pipe is full, the tail thread is wound around the tail thread spool, and the tail thread is cut while the spinning machine is running. 1 per minute while the thread is wrapped
Although the spindle rotates at a high speed of more than 10,000 revolutions, power consumption increases due to the increased weight of the spindle due to the addition of the tail thread spool and the increased air resistance accompanying the rotation. In addition, the tail thread wound around the tail thread spool can be removed with a wire brush or the like during operation, but this is not only extremely dangerous, but also reduces the number of revolutions of the spindle and causes uneven twisting.
Furthermore, the removed tail thread becomes fluff scattered by centrifugal force, worsening the working environment. If this is avoided and the tail strings are manually removed while the machine is stopped, it will take a considerable amount of time and reduce operational efficiency, which is not preferable.
In addition to the above, by attaching the tail thread spool to the spindle, the height of the spindle becomes high, which not only causes center runout, but also makes it impossible to share the spindle with a spinning machine other than simultaneous tube change. In addition, the tail thread spool has unevenness for locking the tail thread, which is not only dangerous, but also the wind at the bottom of the bobbin during winding will have many feathers. There is a limit to the ability to cut the tail thread by pulling and shredding, and in the case of thick or strong threads, cutting errors may occur and the method is not always satisfactory.

Means for Solving the Problems In view of the drawbacks of the prior art described above, the present application is to remove the full bobbins on the spindle, which have been wrapped around the bobbin and the end after the bobbin is full, from the spindle all at once using a simultaneous bobbin changing device. The end of the full bobbin is loop-wound on the spindle by raising the bobbin, and then the full bobbin is removed all at once to the highest position by the pipe changing device, and the full bobbin is moved from the highest position to the peg of the pipe holding device attached to the spinning machine. The cutting device, which runs on a guide rail installed on the front of the machine, travels from a standby position on one end of the machine to a standby position on the other end, and connects the cutting device between the spindle and the full bobbin. The tail thread,
The present invention is characterized by sequentially cutting one by one using a rotary cutter of a cutting device, thereby eliminating the drawbacks of the conventional method.The present invention will be described in detail below with reference to drawings showing embodiments.

Embodiment In the drawings, reference numeral 1 denotes a spinning machine, and a simultaneous tube change device 2 is attached to the spinning machine 1. As is well known, many different types of simultaneous pipe changing devices 2 have been proposed, and many of them are in practical use. The method is to remove all the spindles at the same time, then insert all the empty bobbins 5 into the spindle 3 from which the full bobbin 4 has been removed and replace the full and empty tubes. It is as follows. Reference numeral 6 denotes a dotting bar, to which a large number of bobbin holders 7 corresponding to the spindle 3 of the spinning machine 1 are attached, and a predetermined vertical movement is given by a vertical movement device 8 based on a Scott-Ratssel type strict linear movement mechanism. The device 8 is connected to a longitudinal movement device 9. As shown in the drawings, the longitudinal movement device 9 has a screw rod 11 rotated by a screw gear 10 screwed onto a main shaft 12, and the vertical movement device 8 is attached to the main shaft 12. Therefore, due to the forward and reverse rotation of the screw gear 10, the main shaft 1
2 moves back and forth, and the vertical movement device 8 performs a back-and-forth movement toward or away from the spinning machine 1. Therefore, the dotting bar 6 moves up and down and back and forth in a predetermined trajectory, and the bobbin gripping tool 7 holds the full bobbin 4 and The empty bobbin 5 is held and all the spindles are filled at the same time, and the empty bobbin is replaced, that is, the tube is replaced.

In the above embodiment, the vertical movement device 8 is a Scott-Ratssel type strict linear movement mechanism, and the longitudinal movement device 9 is a screw gear 10. However, the present invention is not limited to this.
Any other mechanism may be used as long as it allows the pipe to move up and down and back and forth in a specified manner, and the type of simultaneous pipe switching device is not limited to the above, but may be any other type that has been used in the past. However, the purpose of this application is achieved.

Next, the tail thread cutting device 13 will be explained. The tail thread cutting device 13 includes a cutting device 14 that runs along the front surface of the spinning machine 1, a guide rail 15 that guides the movement of the cutting device 14, and a drive device 16 that provides running force, that is, driving force, to the cutting device 14. It's like this.
The above-mentioned devices are naturally provided on both the R and L sides of the spinning machine 1, but since the configurations are the same for both, the explanation will be given only for the R side. Guide rail 1
5 has a square cross-sectional shape, is attached to a plurality of mounting pieces 18 provided at appropriate locations on the spindle rail 17, and is installed on the front surface of the machine so as to correspond to a spindle row constituted by a large number of spindles 3. ,
The left and right ends thereof are further extended laterally by a spindle row to become standby positions 19, 19a, and the guide rails 15 are also arranged at guide rollers 20 of the cutting machine 14, which will be described in detail later.
The mounting position shall be set so that the front end of the ring rail 21 does not interfere with the front end of the guide rail 1.
The upper surface of the guide roller 5 serves as a running surface 22 of the guide roller 20, and the lower surface thereof serves as a storage portion 24 for a belt 23 of the drive device 16, which will be described in detail below. Next, the drive device 16 is as follows. A motor 25 for forward and reverse rotation is attached to either the left or right end of the spinning machine 1, and a pulley 26 is attached to the other end, and the belt 23 is suspended between the pulley 26 and the pulley 25a of the motor 25. It is stored in the housing portion 24 of the guide rail 15 to prevent danger when the belt 23 rotates. It is also possible to use steel tape, wire rope, or chain instead of the belt 23, but in the case of a chain, it goes without saying that both pulleys 2
5a and 26 are sprockets.

Finally, the cutting machine 14 is as follows. The drive shaft 28 is mounted on the side wall of the machine body 27 facing the spinning machine 1 so as to face each other with an appropriate interval, and the guide roller 20 is attached to the shaft end protruding outside the machine body 27.
A V pulley 29 is fixed to the shaft end of the machine body 27, and an auxiliary roller 30 is provided on the bottom surface of the machine body 27.
By fitting the guide roller 20 to the guide rail 15, the auxiliary roller 30 comes into contact with the lower front end surface of the spindle rail 17 and maintains the running posture of the machine body 27. By attaching a weight 31 of an appropriate weight to the bottom of the aircraft body 27, the running attitude becomes even more stable. Next, a connecting plate 32 provided on the side wall of the machine body 27 on the side of the spinning machine 1 is connected to the belt 23 using rivets 33 or other suitable connecting devices.
As shown in FIG. 3, the connecting plate 32 is bent so as to straddle the guide rail 15 and fixed to the lower belt 23 with rivets 33 in order to prevent interference. The connecting plate 32 is attached to the belt 23 on the lower side because the attachment process is simple, and there is no problem even if it is attached on the upper side.By attaching the connecting plate 32 to the belt 23 as described above, motor 25
When the cutting machine 14 performs forward and reverse rotation, the cutting machine 14 is pulled by the belt 23 and runs left and right on the guide rail 15 in FIG. Run.

Next, the cutters 34, 34a of the cutting machine 14 will be explained. As shown in FIGS. 3 and 4, two circular cutters 34, 34a are vertically opposed to each other on the left and right sides of a cutter housing 35 protruding from the upper part of the body 27, and one of them The shafts 36 are rotatably mounted such that the parts are cross-polymerized and in close contact with each other, and one of the shafts 36
A V-pulley 37 is attached to the shaft end of the shaft. As shown in FIG. 4, a Y-shaped guide portion 38 is provided on both left and right sides of the cutter storage chamber 35 toward the intersection of the cutters 34 and 34a, and a guide plate 39 is attached to the open end of the guide portion 38. It is worn. 40,40
Reference character a denotes an intermediate pulley, which is fixed to both shaft ends of an intermediate shaft 42 rotatably held by a bearing 41 attached to the inner wall of the machine body 27, and its mounting position is provided on both the left and right sides of the guide roller 20 and the cutter storage chamber 35. The intermediate pulley 40 is located approximately in the middle of the two sets of left and right cutters 34, 34a, and the intermediate pulley 40 is installed so that the V pulley 29 and the intermediate pulley 40a are in the same phase as the V pulley 37, and each pulley has the following: The belts 43 and 44 are attached in this way. That is, as shown in FIG. 4, a belt 43, which is suspended around V-pulleys 29 attached to both drive shafts 28, is cross-hung around an intermediate pulley 40, and the belt 44 is connected to the V-pulleys 37 of both cutters 34, 34a and the intermediate pulley 40a. Hang it in a triangular shape. Therefore, when the motor 25 rotates normally and the cutting machine 14 is pulled by the belt 23 and travels in the direction of arrow 46 (to the left in FIG. 4) in FIG. 4, the cutter 34 provided on the left side rotates in the direction of the arrow. The cutter 34a, which is in pressure contact with the cutter 34, rotates in the direction of the arrow due to friction, and acts to catch the tail thread that is in contact with each of the cutters 34, 34a at the intersection of the two. In addition, the motor 25 is reversed and the arrow 45 opposite to the above
When driving in the direction, the right cutter 34,3
The rotation of 4a is as shown by the arrow in FIG. Also, the rotational speed of the cutters 34, 34a is determined by the V pulley 29,
37. By varying the diameter ratio of the intermediate pulleys 40, 40a, the optimum rotation speed can be set.

Next, the most preferred embodiment of the present application will be described. While the spinning machine 1 is in operation, the cutting machine 14 is on standby at a standby position 19 on either the left or right side of the guide rail 15, as shown in FIG. When the bobbin is full, the ring rail 21 is lowered from the imaginary line position to the solid line position shown in FIG. Operate to change the tube. In the present application, the cutting of the tail thread 51 is performed until the full bobbin 4, which has not been removed from the spindle 3, is attached to the peg 50 of the tube holding device 49 attached to the spinning machine 1.
However, for ease of understanding, one cycle of the operation of the simultaneous pipe switching device 2 will be explained first with reference to the operation explanatory diagram shown in FIG.

FIG. 5a shows the standby position of the simultaneous pipe switching device 2,
At this time, the dotting bar 6 is connected to the spindle rail 1.
7 and operates in the following order. First, the forward/backward movement device 9 is activated to move the dotting bar 6 backward as shown in FIG. 5b.
The dotting bar 6 is positioned so as not to interfere with the spindle rail 17, and then the dotting bar 6 is raised to the highest position shown by the imaginary line in FIG. 5b by the operation of the vertical movement device 8. (or more accurately, the tube holding device) moves forward so that it is directly above the full bobbin 4 on the spindle 3, and then the dotting bar 6 descends to grip the full bobbin 4 as shown in FIG. In the opposite direction, the doffing bar 6 moves and inserts the gripped full bobbin 4 into the peg 50 of the tube holding device 49. After inserting the peg 50 into the full bobbin 4 as described above, grip the empty bobbin 5 previously held in the tube holding device 49, and move the gripped empty bobbin 5 to the dotting bar according to the order from a to d above. 6 is moved to load the empty bobbin 5 onto the spindle 3, and the simultaneous tube changing device 2 returns to the standby position shown in FIG. 5a to prepare for the next tube change.

The above is one cycle of the tube changing operation by the simultaneous tube changing device 2, but in the present application, the tail string 51 is cut in the following manner during the tube changing operation. Fifth
When the full bobbin 4 is gripped in FIG. d, the dotting bar 6 reaches the highest position as shown in FIG. 51
is unraveled, and this tail thread 51 is wound spirally around the spindle 3 as shown in FIG.
2, which is connected to the full bobbin 4 from the upper part of the spindle 3 (Fig. 5e). Next, the dotting bar 6 moves to the highest position at the retreating end, as shown in FIG. Next, the needle thread 51 between the spindle 3 and the full bobbin 4 gradually relaxes when the dotting bar 6 starts descending, and when it descends to the vicinity of the position shown in FIG. If it is lowered as it is, it will gradually become tense, and eventually it will be stretched between the two in a state where tension is applied.

In the present invention, when the dotting bar 6 reaches the position shown in FIG.
When an activation command is issued to activate the cutting machine 14, the cutting machine 14 moves to the standby position 19a on the opposite side from the standby position 19.
The cutters 34 and 34a on the left side in FIG. 4 rotate in the directions of the arrows as described above. In FIG. 1, spindle 3 of the spindle row
The tail threads 51 connected between the full bobbin 4 and the full bobbin 4 are guided one by one from the right end side to the guide plate 39 and the guide portion 38, and when one of the cutters is touched, the tail threads 51 are connected to both cutters 34, 34a. is guided to the intersection of the two to ensure cutting. In cutting the tail thread 51 in the present application, as described above, the tail thread 51 connected between the full bobbin 4 and the spindle 3 is in a relaxed state, and is cut while maintaining the relaxed state. 51 is pulled back to the spindle 3 by the thread tension at the time of cutting, the loop winding 52 is unraveled, and the traveler 54 does not come off. When the empty bobbin 5 is inserted into the spindle 3 and restarted, the spun yarn 53 is reliably wound onto the empty bobbin 5. As described above, the cutting machine 14 is pulled by the belt 23 and runs on the guide rail 15, so the tail thread 51 stretched between the full bobbin 4 and the spindle 3 is moved by the running of the cutting machine 14. Accordingly, the threads are cut one after another, and when the cutting is completed, they stop at the standby position 19a and wait until the next cutting of the tail thread. In the case of cutting the next tail thread, the motor 25 rotates in reverse, and the cutting machine 14 travels in the opposite direction from the standby position 19a to the standby position 19 to cut the tail thread 51. Naturally, the cutter 34 that cuts the tail thread 51 at this time , 34a are on the opposite side to the above. When the cutting of the tail thread 51 is completed, the dotting bar 6, which had been stopped in the above, resumes its movement and holds the full bobbin 4 in the tube holding device 49.
Then, the empty bobbin 5 is grasped and inserted into the spindle 3. In the above explanation, the dotting bar 6 is stopped when cutting the tail thread 51, but the descending speed of the dotting bar 6 from the position f to g in FIG. The speed may be returned to normal speed at the end. Furthermore, the starting and stopping of the cutting machine 14 can be arbitrarily selected from manual or automatic.

Next, the tail thread cutting device 13 can also be implemented in the following modifications. In the above embodiment of the present application, the cutting machine 14 is driven by a motor 25 that rotates in forward and reverse directions.
This is done by using the belt guide rail 15 which is rotated by this motor 25, but by attaching the motor directly to the shaft end of one of the drive shafts 28,
The cutters 34 and 34a may be rotated in forward and reverse directions, and the cutters 34 and 34a may be rotated by a motor attached to the shaft 36 of one of the cutters, or by a motor attached to the drive shaft 28. Furthermore, in the above embodiment, two sets of cutters 34, 34a are installed on both the left and right sides of the machine body 27, but for example, in FIG. After the cutting process is completed, the cutting machine 14 may return to the standby position 19 and wait.

Effects of the Invention As described above, the present invention allows the cutting device, which runs on the guide rail installed on the front of the machine stand, to be moved to one end of the machine stand, until the full bobbin extracted from the spindle is transferred to the tube holder. The machine moves from a standby position to a standby position at the other end, and the tail thread connected to the spindle and full bobbin is sequentially cut one by one by the rotating cutter of the cutting device, so it is possible to It is possible to reliably cut the butt thread across the entire spindle without any problems. Since the cutter is a rotating blade, the tail thread 5 is connected between the spindle and the full bobbin.
1 can be cut without applying tension, and the tail thread after cutting is pulled back toward the spindle by the thread tension at the time of cutting and does not come off the traveler, so there is no thread breakage when restarting, and it is easy to clean the thread after changing the tube. The operation of spinning machines etc. can be restarted automatically. Furthermore, while the spinning machine is in operation, the cutting device is in a standby position where it does not oppose the spindles, so even if the yarn breaks during operation, it is easy to repair and splice all the spindles. The cutting device equipped with a rotary cutter is small and has a simple structure, so it can be put into practical use easily and easily, and there is no need to attach a tail thread spool to the spindle, so it can solve all the problems of conventional devices. It is something.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is a plan view;
Figure 2 is an enlarged sectional view taken along the line A-A in Figure 1, Figure 3 is an enlarged view of the main parts of Figure 2, showing the full bobbin removed from the spindle, and Figure 4 omits the full bobbin. FIG. 3 is a sectional view taken along the line B-B, and FIG. 5 is an explanatory diagram of the operation. 1... Spinning machine, 2... Simultaneous pipe change device, 3... Spindle, 4... Full bobbin, 5... Empty bobbin, 13
... Tail thread cutting device, 14 ... Cutting machine, 15 ... Guide rail, 16 ... Drive device, 20 ... Guide roller, 23 ... Belt, 34, 34a ... Cutter, 47 ... Body wrap, 48 ... ...Butt roll, 51...
Shiri thread, 52...loop winding.

Claims (1)

[Claims] 1 After the full bobbin is full, the full bobbin on the spindle is wrapped around the body and the end, and then the full bobbin is pulled out from the spindle all at once by the simultaneous pipe changing device, and the full bobbin that has been pulled out is transferred to the pipe attached to the machine base. Before it is inserted into the holder, the cutting device, which runs on a guide rail installed on the front of the machine, travels from a standby position on one end of the machine to a standby position on the other end, and the spindle and full bobbin are removed. A method for cutting tail threads in simultaneous tube change such as a spinning machine, characterized by sequentially cutting the threads connecting between the threads one by one using a rotating cutter of a cutting device.