JP3084927B2 - Spinning ring rail fixed position stopping method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for stopping a ring rail at a fixed position suitable for automatically exchanging a traveler using a robot in a ring spinning machine, a twisting machine or the like.

[0002]

2. Description of the Related Art Travellers used in ring spinning machines and the like generally increase the fluff of spun yarn as the abrasion progresses, and the yarn tension increases due to the increase in spun yarn.
It is necessary to exchange them all at once every 4 weeks.
This traveler exchange is preferably performed at the time when the yarn having the most stable spinning state has grown to a size of about a five-segment ball to an eight-sixth ball. Thread breakage immediately after restarting is reduced.

A control device for automatically stopping the spinning machine at such a preferable time for exchanging a traveler is disclosed in Japanese Patent Application Laid-Open No. Sho 63/1988.
-288223. This device includes means for designating the traveler exchange time, means for stopping the spinning of the spinning machine when the yarn reaches a predetermined division suitable for traveler exchange, and when the spinning is stopped, the ring is near the upper end of the chase. Means for controlling the position of the ring rail so as to stop at the first time, and means for restarting the spinning after the traveler is replaced.

As described above, the reason why the ring is stopped at the height position near the upper end of the chase is that the ring forming the thread on the bobbin by repeatedly moving up and down within the range of the chase is moved to the bobbin at this position. This is because the distance from the side is the widest and vacant, making it easy to replace the traveler.

[0005]

As described above, in the above-described control device, the ring is stopped near the upper end of the chase to facilitate replacement of the traveler. In the spinning machine described in this publication, the drive systems of a lifting mechanism such as a spindle, a draft mechanism, and a ring rail are mechanically connected to each other and are simultaneously driven by a common main motor. The whole is stopped by braking the motor.

[0006] In recent years, when a traveler is automatically replaced by a robot, it is essential to stop the ring at an accurate height position to match the position of the operation arm of the robot. However, recent spinning machines often use an electric method such as regenerative braking or DC braking to brake the motor. In such a method, the motor is inevitably required after the stop signal is issued until the motor completely stops. A time delay occurs. In anticipation of this time delay, it is technically difficult to limit the height position of the ring rail to the upper end of the chase when spinning is stopped.

Further, even if the ring can be stopped at the upper end position of the chase, the upper end edge of the tube thread still exists at this position. It is desirable that the work does not interfere with the thread. However, in the system described in the above publication, such a mechanism is impossible. An object of the present invention is to solve such a problem of the related art and to provide a method capable of stopping a ring rail at a position most suitable for traveler exchange.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a spinning machine such as a ring spinning machine having an independent drive system for raising and lowering a lifting mechanism including a ring rail. When the machine reaches a height section suitable for the replacement work, the operation of the machine base is stopped, the exact stop position (first stop position) of the ring rail at that time is stored, and the drive system for the lifting mechanism is stored. To raise the ring rail until the ring reaches a preset second stop position further above the first stop position, perform the traveler replacement work at this position, and after the end, re-start the drive system again Actuating the ring rail to return to the stored first stop position. It is achieved.

[0009]

[Function] When it is detected that the ring rail gradually rises while repeating the ascent and descent, and reaches a height section suitable for the traveler exchange work, braking is immediately applied to all the drive systems of the machine by a predetermined procedure. And the operation is stopped. The ring rail stops at an indefinite height position within the current chase range, but its actual position is measured by a sensor such as a rotary encoder and stored in the memory of the control device as the first stop position.

Subsequently, the drive system of the lifting mechanism is operated to further raise the ring rail, and the ring carried on the ring rail reaches a predetermined second stop position above the upper end of the chase portion. Let it. In this position, there is a sufficient margin between the inner peripheral wall of the ring and the side wall of the bobbin, and the traveler exchange operation can be performed without any trouble.

After completion of the replacement work, the drive system is operated and the ring rail is lowered to the stored actual stop position. Thereafter, the operation of the machine base is restarted, but since the ring rail continues to move up and down from the same height position as the last stop, it is possible to form a good thread. Hereinafter, the present invention will be described in more detail based on preferred embodiments shown in the drawings.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A spinning machine to which the present invention is applied has a drive system separate from a drive system for other mechanisms such as a spindle and a draft device for raising and lowering a lifting mechanism including a ring rail. Type. As an example of this type of spinning machine, for example, Japanese Utility Model Laid-Open No. 3-55855 discloses that during normal yarn formation during yarn spinning, a lifting mechanism is driven by a common main motor in conjunction with a spindle or a draft device. However, only the lifting mechanism is driven by a separately provided independent driving mechanism when spinning is stopped.

This will be described with reference to FIGS. 1 to 3. A line shaft 1 is rotatably provided on both left and right sides of the machine base along a longitudinal direction (left and right direction in FIG. 1). Elevating units 4 for raising and lowering the ring rail 2 and the lappet angle 3 are arranged at regular intervals on both line shafts 1. The lifting unit 4 is, as shown in FIG.
A screw gear 5 that rotates integrally with the line shaft 1, a screw member 6 formed below a poker pillar 7 having an upper end to which the ring rail 2 is fixed, and a nut body 8 that meshes with the screw gear 5. A nut body 11 meshed with the nut body 8 and screwed into a screw portion 9 formed at the lower part of a poker pillar 10 to which the wrappet angle 3 is fixed at the upper end.

The two line shafts 1 are connected to an output shaft 13 of a gear box 12 via gear trains 14 and 15. A drive shaft 18 having a worm 17 that meshes with a worm wheel 16 fitted to the output shaft 13 is provided in the gear box 12. A bevel gear 19 is fitted and fixed to the drive shaft 18, and the bevel gear 19 meshes with a bevel gear 21 fitted and fixed to one end of a rotating shaft 20. The rotation of a front roller driven by a main motor (not shown) is transmitted to a rotation shaft 20 via a belt transmission mechanism 22, and the rotation of a rotation shaft 23 rotated in a certain direction is transmitted via a gear train 24 or 25. Is done. The rotating shaft 20 is provided with electromagnetic clutches MC1 and MC2 which constitute a driving unit for turning on and off the transmission of the rotation of the gear trains 24 and 25 with respect to the rotating shaft 20 to rotate the line shaft 1 forward and backward. When the electromagnetic clutch MC1 is in the excited state and the electromagnetic clutch MC2 is in the demagnetized state, the line shaft 1
When the electromagnetic clutch MC2 is in the excited state and the electromagnetic clutch MC1 is in the demagnetized state.
And is configured to be driven in reverse rotation through the.

At the time of ordinary yarn formation during yarn spinning, lifting and lowering movement of a lifting mechanism interlocked with other mechanisms is performed via this drive system using power transmitted from a front roller. An electromagnetic clutch MC is provided at one end of the drive shaft 18.
3, a toothed pulley 26 in which the rotation of the drive shaft 18 is turned on and off, and an output shaft 27 of a motor 27 capable of rotating forward and reverse.
A toothed belt 29 is wound around the toothed pulley 28 fitted on the "a". An absolute type rotary encoder RE that outputs angle data as position data in conjunction with the movement of the ring rail 2 is attached to the gear train 15 via a gear train 30.

This rotary encoder RE outputs angle data proportional to the amount of movement of the ring rail 2. Each of the electromagnetic clutches MC1 to MC3 and the motor 27 operate based on an output signal from the control device 31. The control device 31 includes a central processing unit (CPU) 32, a program memory 33 constituted by a read-only memory (ROM) storing a control program, and position data and calculation by the CPU 32 when the ring rail 2 occupies the reference position. A working memory 34 as a storage device including a readable and rewritable memory (RAM) for temporarily storing processing results and the like, and an input / output interface 35,
The PU 32 operates based on the program data stored in the program memory 33.

The control device 31 includes operating conditions such as a single lifting / lowering amount of the ring rail, a single hoisting amount, and a stop reference position and a second reference position, which will be described later, for controlling the ring rail when the traveler is replaced. An input device 36 for setting a stop position is integrally incorporated. The control device 31 controls the electromagnetic clutch M based on the set values of the swing operation, the lifting operation, the top bunch winding operation and the like input by the input device 36.
Excitation and demagnetization of C1, MC2 and MC3 are controlled.

Further, the control device 31 has a display 39 for displaying the position data of the rotary encoder RE in units of mm.
And manual switches S1, S for commanding the operation of the motor 27.
2 are provided. These manual switches S1, S2
Is for operating only the lifting mechanism when the spinning of the yarn is stopped. When these switches are pressed, the electromagnetic clutches MC1 and MC2 are both demagnetized to rotate with the gear trains 24 and 25. Instead of transmitting the power between the shafts 20, the electromagnetic clutch MC <b> 3 is excited and the rotation of the pulley 26 driven by the motor 27 is transmitted to the drive shaft 18. One manual switch S1 is for raising and the other manual switch S2 is for lowering, and the motor 27 is driven forward or reverse with the manual switch pressed.

When the yarn is spun by the ring spinning machine having the above-described structure, the operation of raising and lowering the ring rail 2 as shown in FIG. Is formed. The spinning stop operation at the time of traveler exchange will be described based on the time chart of FIG. The time has come for a traveler exchange,
When the ring rail 2 reaches a predetermined stop reference position H _1, it emits a pulse signal rotary encoder RE detects this. This signal is input to the control unit of the main motor, and the supply of power to the main motor is immediately cut off.
This causes the main motor to enter inertial rotation. At the same time, the pulse signal from the rotary encoder RE is also input to a delay timer connected to a brake control unit, and starts counting. After a predetermined time T has elapsed, the delay timer is turned on, which activates the brake to brake the motor and stop the entire machine including the spindle.

At this time, the stop position of the ring rail 2 (first
Stop position) H _i is stored in the CPU 32. This first stop position H _i is the present in the range of chase cop at that time, the value is different in each case by the difference in the delicate conditions during stop. Thereafter, the lifting mechanism is switched independently of the drive system, which further be raised by, upon reaching a predetermined second stop position H _2, the rotary encoder RE detects this and stops at that position. Since the second stop position H ₂ is set further above the upper end of the chase of Kan'ito, sufficient space for performing the traveler replacement between the inner wall and the side surface of the bobbin rings here Exists. In addition, since the position is set so as to coincide with the height position of the operation arm of the robot performing the traveler exchange operation, accurate operation is thereby ensured.

When the traveler exchange operation is completed, the ring rail 2 is again moved to the first stop position H by an independent drive system.
_It descends to _i and is made to match the ring height at the time of the last stop. Next, the common main motor is started, and the spinning of the yarn is restarted via the interlocking drive system. Incidentally, the present invention is not limited to the above embodiment, for example, as means for detecting that the ring rail has reached a height section suitable for traveler exchange, instead of directly detecting the height of the ring rail Alternatively, the spinning length of the yarn may be obtained by integrating the amount of rotation of the draft roller from the start of spinning to estimate the time at which the tube yarn has grown to a size suitable for traveler exchange. Alternatively, a certain time after the start of spinning may be set as the time for traveler exchange.

[0022]

As described above, according to the present invention, when it is detected that the ring rail has reached the height section suitable for the traveler exchange, the spinning of the yarn is stopped to stop the ring rail. The height of the ring rail stopped at an arbitrary height within the range is stored as the first stop position, and the second stop position set further higher than this by using a drive system dedicated to the lifting mechanism. Since it is raised again to perform the traveler exchange work at the position, a sufficient operation space can be obtained, and an accurate traveler exchange operation can be performed using a robot installed in accordance with the position.

After completion of the replacement work, the ring rail is lowered again to the first stop position, and the spinning of the yarn is restarted at this position. Forming becomes possible.

[Brief description of the drawings]

FIG. 1 is a schematic view showing the outline of the configuration of a ring spinning machine for carrying out the method of the present invention.

FIG. 2 is a schematic diagram showing a drive system of a lifting mechanism of a ring spinning machine to which the present invention is applied.

FIG. 3 is a perspective view schematically showing a lifting mechanism.

FIG. 4 is a time chart showing an elevating pattern of a ring rail for forming a tube thread.

FIG. 5 is a time chart showing an operation procedure of the method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Line shaft 2 ... Ring rail 3 ... Rapette angle 31 ... Control device 32 ... CPU 34 ... Work memory (storage device) 36 ... Input device 39 ... Display device MC1, MC2, MC3 ... Electromagnetic clutch RE ... Rotary encoder

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) D01H 1/36 D01H 7/64

Claims (3)

(57) [Claims] In a spinning machine such as a ring spinning machine having an independent drive system for raising and lowering a lifting mechanism including a ring rail, a lifting section for forming a chase of the ring rail is a height section suitable for a traveler exchange operation. When the machine reaches the point, the operation of the machine is stopped, and the accurate stop position (first stop position) of the ring rail at that time is stored,
Activating the drive system for the lifting mechanism to raise the ring rail until the ring reaches a preset second stop position further above the first stop position, and perform traveler exchange work at this position. And stopping the ring rail of the spinning machine at a fixed position by operating the drive system again after the operation is completed to return the ring rail to the stored first stop position. 2. The method according to claim 1, wherein the first stop position corresponds to a thread size between five and eight octaves. 3. The method according to claim 1, wherein the second stop position corresponds to a position of an operation arm of a robot performing a traveler exchange operation.