JPH0156165B2 - - Google Patents

Description

Detailed Description of the Invention The present invention is a spinning machine such as a ring spinning machine or a yarn twisting machine, in which the spindle is moved from one end to the other end along the spindle row, and the pipes are automatically changed one spindle at a time in the meantime. The present invention relates to a tail thread cutting device in a single-spindle continuous automatic pipe changer.

Conventionally, when changing pipes manually, when the bobbin tube becomes full, the tail thread is wound around the bottom of the bobbin pipe several times, and then the machine stand is stopped, the full thread is grasped, and it is removed from the spindle. When the tube was pulled out, the butt thread connected to the full tube thread was torn to pieces. As the yarn was fully pulled out, the remaining yarn connected to the front roller was wound around the spindle, but a new bobbin tube was inserted into the spindle with the remaining yarn wrapped around it, and the operation was restarted. In this case, the remaining thread serves as a seed thread for starting the winding of the thread onto the new thread winding tube. In the conventional method described above, the pipes are manually replaced one by one each time the pipe is full, so the cutting of the tail thread and the winding with the seed thread are performed reliably with almost no mistakes, but the pipe replacement work takes a lot of time. This required a lot of effort and no improvement in efficiency could be expected.

Therefore, in recent years, almost automated pipe changing equipment has been installed, which allows for efficient pipe changing under high-speed operation.

By the way, the general automated pipe switching equipment is
As shown in Figures A and B, a tail thread anchoring device 2 is fitted to the sleeve 3a of the spindle 3 for holding the tail thread 1 wound and cutting it, and a lifting roller 5 is provided for pulling out the full pipe thread 4. The outline of the pipe change procedure using this device is as follows.

That is, as shown in FIG. 4A, when the thread has been wound around the bobbin winding tube 6 and the thread is now full, the tail thread anchoring tool 2 of the tail thread 1 is removed immediately before the machine stops, similar to the conventional example.
Wrap it around the outer circumference multiple times. Next, as shown in FIG. 4B, a lifting roller 5 is brought into pressure contact with the full yarn 4 and rotated clockwise. Since the lifting roller 5 rotates by friction due to pressure contact with the full yarn 4, the full yarn 4 is lifted up as the roller rotates, and is pulled out of the spindle by slipping out of the spindle sleeve 3a firmly fitted therein. The tail thread 1 connected to the full-tube thread 4 and wound around the anchor 2 is cut in the process of extracting the full-tube thread 4. Tail string 1 is tether 2
The seed yarn 1a was caught on a part of the peripheral edge and easily cut, and the seed yarn 1a continued from the tail yarn anchoring device 2 to the front roller 7 and remained in preparation for the next spinning.

As described above, the conventional automatic pipe changing device moves along the spindle row of the full pipe timing machine, and during that time, the unloading roller pulls out the full pipe thread, and the tail thread tether cuts the tail thread and holds the seed thread. Because the pipes are automatically applied and replaced one by one,
Compared to conventional manual methods, the improvement in efficiency and labor savings were extremely large. However, in the case of this automatic pipe change, the end thread tether used is fitted into the sleeve of each spindle and rotated at high speed as one unit with the spindle, so the increase in power consumption due to windage loss is only 1. 3%, and as the number of pipe changes increases, the tail string retained in this anchoring device accumulates, resulting in a further increase in power consumption of 7 to 8%, which has become a problem from the point of view of energy conservation.
Also, since pipes are changed 5 to 6 times during a day's operation, it takes about a week for the tail string to accumulate before winding it around the tether.
Since the amount is large enough to interfere with the cutting of the butt thread, it is necessary to remove it once a week, which requires the machine to stop and requires additional labor to clean.

In addition, an automatic pipe changing device has been proposed as described in Japanese Utility Model Publication No. 45-19059, but in this case, the lifting roller has a solid bullet shape and has multiple spiral protrusions on its outer circumferential surface. In addition, the cutter is arranged so as to be biased to the side of the pulling roller, which causes the tail thread to become long, and as shown in FIG. 1b protrudes from the lower end of the new bobbin tube 4a, and this protruding piece 1b hinders the smooth running of the traveler T, causing thread breakage.

Furthermore, since the tail string 1 is long, removal and cleaning must be carried out frequently.

Furthermore, it is difficult to reliably guide the tail thread when pulling out the full tube thread to the cutter, which is biased to one side of the pulling roller, and the thread may be blown away by the wind and come off, making it impossible to cut it. cases are likely to occur,
Moreover, the cutter needs to be long, and if it is made this long, it will warp due to deformation due to frictional heat, etc., creating a gap between the cutting surfaces and reducing sharpness.

The present invention was proposed in view of the above-mentioned problems of the prior art, and its purpose is to provide a spinning machine that can shorten the tail thread, ensure cutting of the tail thread, and shorten the cutter. It is an object of the present invention to provide a tail thread cutting device for an automatic pipe changing device.

That is, in the present invention, the doffing roller has an occluded circular shape with separated circumferential ends, and a spiral shape with the same pitch as the spindle pitch, and furthermore, the doffing roller has a front end in the direction of movement of the doffing machine on the operating shaft. The cutter is fixed in one part, and the other part is spaced apart from the operating shaft to form a hollow part, and the cutter is cantilevered from the rear side in the direction of movement of the doffing machine in the hollow part of the unloading roller. The tip is inserted until the tip is just before the part that is fixed to the operating shaft of the lifting roller.

With the above configuration, the tail yarn of the full-tube yarn immediately after being pulled out is reliably guided from the spindle to the cutter that is disposed penetratingly in the hollow part of the spiral pulling-out roller in the shortest distance from the spindle. be cut off.

The structure of the present invention will be described below with reference to embodiments shown in the drawings.

The embodiment shown in FIG. 1 shows a case where the doffing machine body moves from the right side to the left side of the spinning frame.

In the drawings, A denotes a doffing machine body, and a doffing roller 5 is mounted on an operating shaft 10 which is rotated from a drive shaft 8 via a timing belt 9, and operates in substantially the same manner as in the prior art. That is, the unloading roller 5 is fixed to an operating shaft 10 rotated by the drive shaft 8 at the front end of the doffing machine A in the moving direction, and the doffing machine A moves through a spindle pitch P, that is, one spindle pitch P. The spindle 3 rotates once while
is supported in a direction perpendicular to the spindle pitch P
It has a leftward spiral of the same pitch as , and its circumferential surface has an equally rough surface to which a rubber or sponge material with a high coefficient of friction is adhered. The helical shape of the lifting roller 5 is a spiral shape having a hollow portion 11 as shown in the figure, and both ends on the operating shaft 10 are separated by approximately 1/4 circumference as shown in FIG. A circular portion 5' is formed. The lifting roller 5 also has an operating shaft 1 so as to swing toward the spindle 3.
0 support arm 12 is swingably attached to the drive shaft 8, and is maintained under pressure by a spring 13 (see FIG. 2) so that it can always come into contact with the spindle 3. Furthermore, as shown in FIG. 2, when the pulling roller 5 is rotated in contact with the full yarn, the outer diameter is such that the full yarn 4 can be completely pulled out from the spindle 3 in about 1/2 rotation of the roller. Make it into a spiral. Reference numeral 14 is a chute for guiding the unloaded full-tube yarn to the storage section.

To show an example of the specific shape of the lifting roller 5, as shown in FIGS. 2A and 28, the roller base plate 5a is fan-shaped and spiral-shaped (the pitch of the spiral is the same as the spindle pitch). One end (the front end in the moving direction of the doffing machine) is fixed to a cylindrical boss 5c via an arm 5b.
c is key-fitted to the operating shaft 10, and a rubber material 5d is fixed to the outer periphery of the roller base plate 5a. Because of the above structure, there is a cavity 11 from one fixed end of the arm 5b to the other end.
is formed, and even if the cutter 18 is installed from within this cavity 11 toward the rear side in the direction of movement of the doffing machine A, the rotation of the doffing roller 5 will not be hindered.

As shown in FIGS. 1 and 3, a traverse cam 16 having a reciprocating drive type guide groove 15 formed on its circumferential surface is fitted near the base end of the operating shaft 10 to which the lifting roller is attached. Loosely engaging pin 1
A serrated cutter rod 18a with a serrated shaft 7 attached thereto is slidably provided on the operating shaft insertion portion 12a of the support arm 12, and the cutter rod 18a is slidably connected onto the insertion portion 12a. A fixed cutter branch 18b is provided which is slid against the cutter. These two cutter rods 18a and 18b are combined to form one cutter 18, and the cutter 18 penetrates into the hollow part 11 of the pulling roller 5 so that thread cutting can be reliably performed on either side of the lifting roller 5. and at a position that does not interfere with the 1/2 rotation of the pulling roller 5 required for pulling out the full yarn. As a result, the lifting roller 5
When you rotate this, it connects to the coaxial traverse cam 16.
Since the cutter rod 18 also rotates, the cutter rod 18 slides through the pin 17 that is loosely engaged with the guide groove 15 of the cam 16.
a slides in the axial direction of the operating shaft 10, and is connected to a fixed cutter branch 18b to form a saw blade-like cutter blade 18',
The thread entering the groove 18' is reliably cut by the shearing action. The thread cutting by this cutter 18 is performed by lifting the sliding cutter rod 18a to 1/1/2 of the lifting roller 5.
If the guide groove 15 is formed to such an extent that the slide can be slid by one stroke or two strokes during two rotations, this can be done without mistakes.

Now, as shown in Fig. 1, when the yarn has been wound around the bobbin tube 6 and the yarn 4 is full, the doffing machine A is operated and the doffing roller 5 is rotated, while the spindle at the end of the doffing machine is full. This is brought into contact with the pipe thread 4, and due to the frictional lifting action, the full pipe thread 4 is lifted as shown in Fig. 2.
Remove it from spindle 3. The fully-tubed yarn 4 that has been pulled out rolls along the curve of the chute 14 and is stored in the storage section of the tube changing device. When the full tube yarn is pulled out, the tail yarn 1 connected to the full tube yarn 4 is released and wound around the spindle 3. In this way spindle 3
The tail thread 1 connected to the full canal thread 4 has a large number of incisal edges 1.
It enters into the blade groove of the cutter 18 forming the cutter 8'. The sliding cutter branch 18a of the cutter 18 is rotated by the traverse cam 16 as the lifting roller 5 rotates.
Since the cutter reciprocates in the axial direction of the operating shaft 10, the tail thread 1 is cut by shearing action with the fixed cutter rod 18b. The cutter 18 penetrates through the hollow portion 11 of the lifting roller 5 and protrudes from both end surfaces thereof, and the lifting roller 5 has an truncated spiral at both ends. The tail yarn 1 that is released from the full yarn 4 that is lifted in contact with the lifting roller 5 during extraction is separated from the lifting roller 5 at the helical notch 5' and is cut by the cutting blade 18' of the cutter 18 directly below. Since the target is reliably captured, cutting can be performed without mistakes. On the other hand, as the full yarn 4 is pulled out, the seed yarn 1a connected to the front roller 7 is wound around the spindle 3 as shown in the figure, and is prepared for winding onto a new bobbin tube 6. The doffing machine body is moved and the above-mentioned processes of removing the full pipe thread, cutting the tail thread, and winding the thread onto a new thread winding pipe are carried out sequentially on all spindles of the machine base, thereby completing the pipe change.

As explained above, the present invention has a doffing machine that moves along the spindle row of the machine when the doffing machine is full, and a doffing machine that is rotatably mounted on an operating shaft that is arranged parallel to the moving direction of the doffing machine. A single-spindle continuous automatic tube changing device for a spinning machine, which is equipped with a lifting roller that pulls out the full yarn from the spindle on the outer peripheral surface, and a cutter that cuts the tail yarn in connection with the pulling out of the full yarn from the lifting roller. In the above, the above-mentioned doffing roller is formed into an occluded circular shape with separate ends in the circumferential direction, has a spiral shape with the same pitch as the spindle pitch, and is fixed to the operating shaft at the front end in the direction of movement of the doffing machine. and the other portion is spaced apart from the operating shaft to form a hollow portion, and the cutter is supported in a cantilevered state from the side in the moving direction of the doffing machine in the hollow portion of the unloading roller, Since the tip has been inserted just before the part where it is fixed to the operating shaft of the pulling roller, the tail thread of the full-tube yarn just after being pulled is inserted into the cutter which is arranged in the cavity of the hollow part of the spiral pulling roller. The length of the tail thread hanging down from the spindle can be made very short.This allows the tail thread to travel easily when the next time a new bobbin tube is inserted into the spindle and winding is started. It does not interfere with the normal running of the thread, eliminates thread breakage, and saves labor.

Furthermore, by arranging the cutter in the cavity of the helical lifting roller, it is possible to reliably supply the tail yarn of the full tube yarn after being pulled out by the lifting roller onto the cutter. It becomes possible to shorten the length of the cutter, thereby making it easier to process the grinding surfaces of the cutter, and maintaining good sharpness over a long period of time.

Furthermore, since the tail thread wound around the spindle can be shortened, the interval between removal and cleaning of the tail thread can be lengthened, contributing to labor savings.

[Brief explanation of drawings]

1 to 3 show embodiments of the present invention,
Figures 1 and 2 show the procedure for removing a full-tube thread.
Figure 1 is its perspective view, Figure 2 is its side view,
Figure A is a side view of the lifting roller alone, Figure 2B is its front view, Figure 3 is a longitudinal sectional front view of the cutter section, and Figure 4 is an example of a spindle equipped with a conventional tail thread anchor. Figure A is a side view of the full tube state, and Figure B is a side view of the procedure for removing the full tube thread.
FIG. 5 is an explanatory diagram showing the relationship between the end thread on the spindle and a new bobbin tube when fitted in another conventional device. 1... Tail thread, 1a... Seed thread, 3... Spindle, 4... Full tube thread, 5... Unloading roller, 5'...
... Missing circle part, 10... Operating shaft, 11... Hollow part, 1
8...Cutter.

Claims (1)

[Scope of Claims] 1. A doffing machine that moves along the spindle row of the machine when full, and a doffing machine that is rotatably mounted on an operating shaft arranged parallel to the moving direction of the doffing machine, and In a single-spindle continuous automatic pipe changing device for a spinning machine, the device is equipped with a lifting roller that pulls out the full yarn from the spindle at a surface, and a cutter that cuts the tail yarn in connection with the pulling out of the full yarn by the lifting roller. The above-mentioned unloading roller has an occluded circular shape with separated circumferential ends, and has a spiral shape with the same pitch as the spindle pitch, and is fixed to the operating shaft at the front end in the moving direction of the doffing machine, The other portion is spaced apart from the operating shaft to form a cavity, and the cutter is cantilevered from the rear side in the direction of movement of the doffing machine in the cavity of the unloading roller,
A tail thread cutting device for an automatic tube changing device for a spinning machine, characterized in that its tip is inserted to a position just before a portion fixed to an operating shaft of a lifting roller.