An auxiliary device for assisting in replacing a bobbin of a winding device

Abstract

The present application relates to a kind of auxiliary devices for assisting the replacement of the bobbin of winding device, including cut filament unit, suction unit, hook filament unit arranged in compact mode, and driving source for driving the cut filament unit, the suction unit and the hook filament unit can be rotated between initial position and hanging filament position as a whole, wherein, the suction unit is located between the cut filament unit and the hook filament unit, the cutting edge of the cut filament unit is partially exposed to the inside in the direction opposite to the open direction of the suction nozzle of the suction unit. Its beneficial effect lies in that, before the filament is cut by the cutting edge of the cut filament unit, the filament can be fully contacted with the suction nozzle of the suction unit.

Description

TECHNICAL FIELD

[0001] The present invention relates to an auxiliary device for a textile machine, in particular an auxiliary device for assisting in the replacement of a bobbin of a winding device during a bobbin replacement process. BACKGROUND

[0002] The background art is described in prior art CN 108861865 A.

[0003] In its drawings and description, an auxiliary device comprises a suction mechanism, a guide mechanism and a filament cutting mechanism. The three mechanisms are installed in a compact manner and can be rotated as a whole to perform the replacement of a bobbin. The filament cutting mechanism comprises a filament cutting unit. The filament cutting unit is preferably a cutting knife with a cutting edge. The cutting edge is arranged to face the filament when cutting the filament, and the orientation of the cutting edge is substantially consistent with the opening direction of the suction nozzle of the suction unit. According to one of the embodiments, the filament cutting mechanism comprises an upper cutting knife and a lower cutting knife arranged in a V shape, and the cutting edge of the upper cutting knife and the cutting edge of the lower cutting knife are arranged in a cross shape.

[0004] During the replacement of the bobbin, the auxiliary device starts rotating from the initial position, approaches the filament, and cuts the filament. At the moment of cutting, the end of the filament needs to be sucked and held by the suction unit of the auxiliary device. Therefore, the distance between the filament and the suction nozzle of the suction mechanism must be very small when the filament is cut.

[0005] The technical solution disclosed in CN 108861865 A faces the problem that the filament is cut too early before the filament can be fully contacted with the suction nozzle. SUMMARY

[0006] In order to solve the above technical problems, the present invention proposes the following technical solutions to improve the structure and process of the auxiliary device of the prior art:

[0007] The first technical solution is an auxiliary device for assisting in the replacement of a bobbin of a winding device, comprising a filament cutting unit, a suction unit, a filament hooking unit arranged in a compact manner, and a driving source for driving the filament cutting unit, the suction unit and the filament hooking unit as a whole to rotate between an initial position and a filament hanging position, wherein the suction unit is located between the filament cutting unit and the filament hooking unit, and the cutting edge of the filament cutting unit is partially exposed inwardly in a direction opposite to the opening direction of the suction nozzle of the suction unit.

[0008] Compared with the prior art, the beneficial effect of this technical solution is that the filament can be fully contacted with the suction nozzle of the suction unit before the filament is cut by the cutting edge of the filament cutting unit.

[0009] The second technical solution is that the cutting unit has a guide plate, which covers the lower part of the blade, so that the upper part of the blade is exposed inward.

[0010] During the rotation of the auxiliary device, the auxiliary device actively approaches the long filament and contacts the long filament. The long filament moves relatively along the guide plate and contacts the blade to be cut off after moving a distance.

[0011] In order to more effectively obtain the effect in the second technical solution, the third technical solution is provided, in particular, the structure of the guide plate of the cutting unit is set as follows: during the replacement of the bobbin, the corner of the guide plate which first contacts the long filament is a circular corner, the bottom edge of the circular corner extends to the inner side, and then is bent upward to intersect with the blade. The long filament moves along the edge of the guide plate before finally contacting the blade.

[0012] According to the fourth technical solution of the present application, the cutting unit and the hooking unit are arranged on the suction pipe of the suction unit, and the suction pipe rotates under the driving of the driving source.

[0013] The technical solution provides a compact structure, and the rotation of the suction pipe realizes the rotation of the entire auxiliary device.

[0014] The fifth technical solution provided by the present application is a long filament cutting, suction and hanging method, which is executed by using the auxiliary device disclosed in the present application.

[0015] A long filament cutting, suction and hanging method using the auxiliary device, wherein the winding device has a traversing guide and a pair of clamping discs, and a cutting knife and a hook element are arranged on one of the clamping discs close to the auxiliary device, the method comprising the following steps: first, the traversing guide is stopped at a fixed position on the side close to the auxiliary device; second, after the auxiliary device starts to rotate, the long filament contacts the guide plate of the cutting device and is guided along the guide plate of the cutting device for a distance; third, when the long filament completely contacts the suction port of the suction unit and is hooked by the hooking unit, the long filament is guided to contact the blade of the cutting device; fourth, the auxiliary device continues to rotate to a hanging position, and the long filament held by the suction unit and the hooking unit is sent to the vicinity of the clamping disc of the winding device; fifth, after the long filament is captured by the hook element of the clamping disc, the cutting knife on the clamping disc cuts the long filament; and sixth, the auxiliary device is rotated back to the initial position.

[0016] According to the sixth technical solution of the present invention, in the second step of the fifth technical solution, the arc angle of the guide plate of the shredding unit first contacts the filament, the auxiliary device continues to rotate, and the filament moves along the bottom edge of the guide plate of the shredding unit under the constraint of the guide plate of the shredding unit. At the same time, the suction unit and the hooking unit gradually approach the filament, the auxiliary device continues to rotate, and the filament is guided upward by the guide plate until it contacts the blade.

[0017] According to the seventh technical solution of the present invention, in the second step, when the blade approaches the filament, the traverse guide guides the filament to swing back and forth slightly several times. This slight swinging of the filament increases the likelihood that it will be cut by the blade.

[0018] According to the eighth technical solution of the present invention, in the sixth step, during the rotation of the auxiliary device, the filament is temporarily constrained in a lateral movement stroke away from the rotation area. The auxiliary device will not cut the filament again due to contact with it during the rotation process. Attached Figure Description

[0019] Appendix Figure 1 The diagram schematically shows a top view of an auxiliary device for assisting in changing the bobbin of a winding device according to the present invention, when the auxiliary device is in its initial position.

[0020] Appendix Figure 2 A partial front view of the auxiliary device is shown schematically.

[0021] Appendix Figure 3 A side view of the invention is schematically shown before the filaments are cut by the filament cutting unit;

[0022] Appendix Figure 4.1 The diagram schematically illustrates the positional relationship between the slicing unit and the filament when the auxiliary device is rotated to contact the filament.

[0023] Appendix Figure 4.2 A schematic diagram illustrating the positional relationship between the filament and the filament cutting unit after the filament has moved a certain distance on the filament cutting unit;

[0024] Figure 5 The side view of the invention schematically shows the filaments after they have been cut by the filament cutting unit and are held by the suction unit and the filament hooking unit.

[0025] Figure 6 A schematic diagram of the clamping plate portion and the auxiliary device of the present invention when the auxiliary device is rotated to the clamping plate position is shown in part.

[0026] Figure 7Partial view of the chuck part and the auxiliary device of the present invention when the auxiliary device is rotated into the chuck position. DETAILED DESCRIPTION

[0027] The winding device is used to wind the filaments into a shape, forming a shaped bobbin. The winding is temporarily stopped after the bobbin is formed. The bobbin is removed and an empty winding tube is put into the winding device for winding a new bobbin. The removal of the bobbin and the insertion of the empty winding tube can be achieved in an automatic manner or in a manual manner in the prior art. The above-mentioned bobbin changing process requires the use of an auxiliary device. The auxiliary device achieves the cutting, suction and hanging of the filaments. The auxiliary device and the method performed using the auxiliary device will be described in detail below with reference to the drawings.

[0028] Figure 1 Figure 1 is a top view of the present invention when the auxiliary device is in the initial position; Figure 2 is a side view of the present invention before the filaments are cut by the cutting unit; Figure 3 Figure 3 is a side view of the present invention when the filaments are cut by the cutting unit; Figure 6 Figure 4 is a partial view of the chuck part and the auxiliary device of the present invention when the auxiliary device is rotated out of the chuck position. The following description will be made in conjunction with Figure 1 , Figure 3 and Figure 6 . Reference is made to Figure 1 and Figure 3As shown, the winding device of the present application comprises a filament inlet side 5, an auxiliary device 1, a reciprocating guide device 4, a friction roller 3 and a cradle 2. The cradle 2 is provided with a pair of clamping discs 2.1 capable of clamping a winding tube 7 at one end, and has a rotation axis 2.2 at the other end. The cradle 2 can rotate around the rotation axis 2.2 so that the clamped winding tube 7 can move towards or away from the friction roller 3. When the winding tube 7 is close to the friction roller 3, the winding tube 7 is in a winding working state; when the winding tube 7 is away from the friction roller 3, the winding tube 7 is in a state of being replaced or being replaced. The reciprocating guide device 4 has a traversing guide 4.1, a guide belt 4.2 and a drive motor 4.3. The drive motor 4.3 drives the guide belt 4.2 and moves the guide belt 4.2 in alternating directions by alternately changing the rotation direction of the drive motor 4.3. The traversing guide 4.1 is fixed on the guide belt 4.2, so that the traversing guide 4.1 can move in alternating directions with the guide belt 4.2, that is, reciprocate along the axial direction of the winding tube 7. The winding tube 7 is in contact with the friction roller 3 which is directly driven by a driving source not shown. By means of the contact friction force, the winding tube 7 is driven to rotate. The traversing guide 4.1 is located on the upstream side of the friction roller 3, and the auxiliary device 1 is located on the upstream side of the traversing guide 4.1. The traversing guide 4.1 and the auxiliary device 1 are both located on one side of the friction roller 3, that is, the downstream side. During normal winding process, the filament 6 passes through the filament inlet side 5, then passes through the traversing guide 4.1 and is guided by the traversing guide 4.1 to reciprocate along the axial direction of the winding tube 7, and then enters the contact part of the winding tube 7 and the friction roller 3, and finally is wound on the winding tube 7 to form a so-called bobbin 10.

[0029] According to Figure 1 As shown, the auxiliary device 1 comprises a filament cutting unit 13, a suction unit 14 and a filament hooking unit 15. The filament cutting unit 13, the suction unit 14 and the filament hooking unit 15 are installed together in a compact manner, and the suction unit 14 is clamped between the filament cutting unit 13 and the filament hooking unit 15.

[0030] Further as Figure 1 and Figure 3As shown, the suction unit 14 has a "L" shaped suction pipe 11 which consists of a horizontal section 11.1 and a vertical section 11.2. To achieve the suction of the filament, one end of the vertical section 11.2 is connected to a negative pressure source which is not shown, and one end of the horizontal section 11.1 is a suction nozzle 11.3 for the suction of the filament. When the negative pressure source is connected to the suction pipe 11, the suction nozzle 11.3 of the suction pipe 11 will generate a suction effect. When the cut end of the filament 6 is located near the suction nozzle 11.3, it will be automatically sucked by the suction nozzle 11.3, and in this way, the filament 6 can be held at the suction nozzle 11.3 with a certain tension. In order to rotate the suction unit 14, the suction pipe 11 of the suction unit 14 is connected to a driving device. As a preference, the driving device is a step motor 12. The transmission can be achieved by providing a gear on the vertical section 11.2 of the suction pipe 11 and engaging the gear with the gear of the output shaft of the step motor 12. Under the driving of the step motor 12 and the transmission of the gear, the suction pipe 11 rotates around the vertical section 11.2 as the rotation axis.

[0031] It should be noted that the opening direction of the suction nozzle 11.3 is defined as the outer lateral direction, and the inner lateral direction is opposite to the outer lateral direction. Figure 2 The partial front view of the auxiliary device is shown. The direction reflected in Figure 2 is the outer lateral direction which is perpendicular to the upward direction of the paper, and the inner lateral direction which is perpendicular to the downward direction of the paper.

[0032] In order to stably hold the filament 6, the filament hooking unit 15 includes a catching element 16. The catching element 16 can cooperate with the suction nozzle 11.3 of the suction pipe 11 to hold the filament 6 which is sucked by the suction nozzle 11.3, and in this way, the part of the held filament is sent to the area near the chuck 2.1 of the winding device at an angle which can be easily hooked by the hooking element 8 of the chuck 2.1. As a preference, the catching element 16 is provided as a plate-shaped member which is arranged in the same direction as the opening direction of the suction nozzle 11.3. The plate-shaped member has an inner recess 16.1 which is recessed inwardly in the inner lateral direction, and thus the inner recess 16.1 can accommodate the lateral passing of the filament 6.

[0033] The Figure 4.1 schematic view shows the position relationship between the filament and the filament cutting unit when the auxiliary device rotates to contact the filament, and also shows the structure of the filament cutting unit. The filament cutting unit 13 has a guide plate 19 and a blade 17. The guide plate 19 is selected and designed in such a way that the guide plate 19 is designed to be curved, and the lower part of the blade 17 is covered by the guide plate 19, so that the upper part of the blade 17 is exposed inwardly. The blade 17 of the filament cutting unit is exposed inwardly in the direction opposite to the opening direction of the suction nozzle 11.3 of the suction unit 14. In this way, the blade 17 of the filament cutting unit can cut the filament 6 which is held by the suction nozzle 11.3 of the suction unit 14.Figure 4.1 The direction of the opening of the suction nozzle 11.3 is to the left, the direction of the exposure of the cutting edge is to the right. One corner of the guide plate 19 is a rounded corner, which is the first to come into contact with the thread. The base of the rounded corner extends inwards and then bends upwards to meet the cutting edge 17.

[0034] The cutting unit 13 and the catching element 16 are arranged next to each other on both sides of the suction nozzle 11.3 of the suction tube 11. Both the cutting unit 13 and the catching element 15 are arranged on the transverse section 11.1 of the suction tube 11 of the suction unit 14, so that they rotate with the rotation of the suction tube 11. Preferably, the cutting unit 13 and the catching element 15 are arranged on a support 18, which is connected to the transverse section 11.1 of the suction tube 11.

[0035] According to the attached drawings Figure 1 After the thread 6 has been treated by the treatment device on the upstream side, it passes through a lifting thread guide 20 and enters the winding device. The lifting thread guide 20 is movable between a lower position and an upper position by means of a cylinder 20.1. After the lifting thread guide 20, the thread 6 passes through a transversely reciprocating thread guide 4.1 and then enters the contact gap between the friction roller 3 and the bobbin 10. The thread guide 4.1 is always kept in axial reciprocating movement along the winding tube 7 during operation. The area covered by the movement path of the thread between the lifting thread guide 20 and the thread guide 4.1 is a triangular area 6.1, as shown by the diagonal hatched area in Figure 1 In order to avoid interference with the thread during normal operation, the auxiliary device 1 does not need to be outside the triangular area 6.1 when it is not in operation. Preferably, the transverse section 11.1 of the suction tube 11 is then in a position substantially perpendicular to the winding tube 7 and away from the bobbin 10.

[0036] When the bobbin 10 reaches the preset parameter standard (such as bobbin diameter, winding time) of the machine control system, the bobbin 10 completes winding and waits to be unloaded and replaced with a new empty winding tube. At this time, the traversing guide 4.1 stays at a position close to the side of the auxiliary device 1, waiting for the auxiliary device 1 to perform cutting and suction of the filament. The stepping motor 12 for driving the auxiliary device 1 receives signals transmitted from the machine control system, and drives the auxiliary device 1. At the same time, the suction pipe 11 is connected to the negative pressure source. Under the driving of the stepping motor 12, the vertical section 11.2 of the suction pipe 11 rotates, and the horizontal section 11.1 rotates synchronously, approaching the horizontally stationary filament 6. With further rotation, the auxiliary device 1 begins to contact the filament 6. The circular arc corner of the guide plate 19 first contacts the filament 6, as shown in FIG. 10, which is a schematic diagram of the position of the filament before contacting the partially exposed blade 17. As the auxiliary device 1 continues to rotate, the filament 6 gradually approaches the suction nozzle 11.3 and the hooking unit 15. At the same time, the filament 6 moves along the bottom edge of the guide plate 19 of the cutting unit 13 under the constraint of the guide plate 19 of the cutting unit 13. The auxiliary device 1 continues to rotate, and the filament 6 is guided upward by the guide plate 19 until it contacts the blade 17. When the filament 6 is in the position shown in FIG. 11, the filament is in sufficient contact with the suction nozzle 11.3 and the inner recess 16.1, so that when the filament is cut, the filament end is successfully sucked by the suction nozzle 11.3 and held by the suction nozzle 11.3 and the inner recess 16.1, as shown in FIG. 12, which is a schematic diagram of the holding state of the filament end. Figure 4.1 Figure 4.1 Figure 4.2 Figure 5 Figure 4.2

[0037] When the bobbin 10 completes winding, the cradle 2 rotates around the rotation axis 2.2 under the action of a cylinder not shown, and the bobbin 10 is lifted and separated from the friction roller 3. After the full bobbin 10 is removed from between the two chucks 2.1, a new winding tube 7 is loaded between the two chucks 2.1. The cradle 2 reverses rotation, so that the new winding tube 7 and the friction roller 3 come into contact and rotate. At the same time, the chucks 2.1 also rotate again with the winding tube 7.

[0038] ​​​​​The auxiliary device 1 holding a part of the filament through the suction nozzle 11.3 and the inner recess 16.2 continues to rotate in the original direction under the drive of the step motor 12. Until the part of the held filament is located near the chuck 2.1, i.e. the handover position, the auxiliary device 1 receives a stop signal. As shown in Figure 6 the part of the held filament intersects the plane where the chuck 2.1 is located. The hook element 8 located on the circumference of the chuck 2.1 and protruding from the chuck 2.1 hooks the part of the held filament 6 when it rotates into contact with the filament 6 and rotates the filament to be wound on the winding tube 7. Shortly after the filament 6 is hooked by the hook element 8, the part of the filament held by the suction nozzle 11.3 of the suction tube 11 and the hook element 8 is in contact with the cutter 9 arranged on the chuck 2.1 and is cut off. The end connected to the filament wound on the winding tube 7 becomes the end of the bobbin, and the other end is sucked away by the suction tube 11. At this time, the filament 6 is continuously transported from the upstream processing device, hangs on the inner recess 16.1 of the catching element 16 and is wound on the winding tube 7. Since the catching element 16 of the auxiliary device 1 is kept stationary at the handover position for a short time, the filament 6 is repeatedly wound on one position at the end of the winding tube 7, forming a so-called tail filament 21.

[0039] Then, the auxiliary device 1 receives a signal instruction to rotate the auxiliary device 1 in the opposite direction of the original rotation direction. During the reverse rotation, the filament 6 hanging on the inner recess 16.1 of the catching element 16 can automatically disengage from the inner recess 16.1 and fall onto the plane at the same height as the reciprocating traversing guide 4.1, which is captured by the traversing guide 4.1 for reciprocating movement. Figure 7 A partial schematic view of the chuck part and the auxiliary device of the present application is shown schematically when the auxiliary device rotates in the opposite direction away from the chuck. In order to avoid contact between the auxiliary device 1 and the filament during the rotation in the opposite direction, as shown in Figure 7 the filament 6 is temporarily constrained in the traversing stroke away from the rotation area, and the area covered by the traversing stroke is shown as 6.2 in the figure.

[0040] Then, the auxiliary device 1 returns to the initial position and waits for the next task. The filament is guided to make normal traversing reciprocating movement, and the traversing stroke is the length of the bobbin.

Claims

1. An auxiliary device for assisting in replacing a bobbin of a winding device, comprising a cutting unit, a suction unit, a hooking unit, which are arranged in a compact manner, and a drive source for rotating the cutting unit, the suction unit and the hooking unit as a whole between an initial position and a thread hanging position, wherein, The suction unit is located between the cutting unit and the hooking unit, characterized in that the cutting edge of the cutting unit is partially exposed to the inside in the direction opposite to the opening direction of the suction nozzle of the suction unit.

2. The auxiliary device according to claim 1, characterized in that the cutting unit has a guide plate that covers the lower part of the cutting edge so that the upper part of the cutting edge is exposed to the inside.

3. The auxiliary device according to claim 2, characterized in that the guide plate of the cutting unit is structured such that, during the bobbin replacement process, the corner of the guide plate that first contacts the filament is a rounded corner, the bottom edge of the rounded corner extends to the inside, and then bends upward to meet the cutting edge.

4. The auxiliary device according to any one of claims 1 to 3, characterized in that the cutting unit and the hooking unit are provided on a suction pipe of the suction unit, and the suction pipe rotates under the drive of the drive source.

5. A filament cutting, suctioning and hanging method using the auxiliary device according to claim 1, wherein, The winding device has a traversing guide and a pair of chucks, and a cutting knife and a hook element are provided on one of the chucks near the auxiliary device, characterized in that the method comprises a first step in which the traversing guide stops at a fixed position on the side near the auxiliary device, a second step in which, after the auxiliary device starts to rotate, the filament contacts the guide plate of the cutting device and is guided along the guide plate of the cutting device for a distance, a third step in which, after the filament completely contacts the suction port of the suction unit and is hooked by the hooking unit, the filament is guided to contact the cutting edge of the cutting device, a fourth step in which the auxiliary device continues to rotate to a filament hanging position, and the filament held by the suction unit and the hooking unit is sent to the vicinity of the chuck of the winding device, a fifth step in which, after the filament is captured by the hook element of the chuck, the cutting knife on the chuck cuts the filament, a sixth step in which the auxiliary device rotates back to the initial position.

6. The filament cutting, suction and hanging method according to claim 5, characterized in that in the second step, the rounded corner of the guide plate of the cutting unit first contacts the filament, the auxiliary device continues to rotate, the filament moves along the bottom edge of the guide plate of the cutting unit under the constraint of the guide plate of the cutting unit, and at the same time the suction unit and the hooking unit gradually approach the filament, the auxiliary device continues to rotate, and the filament is guided upward by the guide plate until it contacts the cutting edge.

7. The filament cutting, suction and hanging method according to claim 6, characterized in that in the second step, when the cutting edge approaches the filament, the traversing guide guides the filament to swing back and forth a few times with a small amplitude.

8. The filament cutting, suction and hanging method according to any one of claims 5 to 7, characterized in that in the sixth step, during the rotation of the auxiliary device, the filament is temporarily constrained in the traversing path away from the rotation area.

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