JPH0313332B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for determining the winding start position on a bobbin in a ring spinning machine or a yarn twisting machine (hereinafter simply referred to as spinning machine).

[Conventional technology]

The elevating device that performs the building motion of the ring rail in the above-mentioned spinning machine is configured with a lifting lever that is swung by a heart cam and a winding mechanism that is attached to this lifting lever, as disclosed in Japanese Patent Publication No. 51-2971, for example. This is well known as shown in . When using this device, the winding mechanism is convenient not only when performing the above-mentioned building motion but also for bunch winding at the beginning of winding. That is, after doffing is completed, the lifting motor of the winding mechanism is driven to raise the ring rail to a predetermined position, and the machine base is rotated (at this time, the heart cam is normally released by the clutch and the lifting lever does not swing) to wind the ring rail a predetermined number of times ( (bunch winding), and then the motor is reversed and lowered to the winding start position.

[Problem that the invention seeks to solve]

Recently, it has been required to accurately set the winding start position. This allows a large amount of yarn to be efficiently wound around the bobbin, and this can be used to prevent tangles when the yarn is released in the next process such as auto-doping, winding, etc.

However, the determination of the winding start position is determined by the inertial rotation of the lifting motor of the winding mechanism and the actuation timing of the brake. The settings for these periods are
The lowering position of the ring rail is detected by a detection switch such as a limit switch, and means for finely adjusting the mounting position of this detection switch is employed. However, this adjustment requires great skill; for example, the operating time of the detection switch is 0.1
When the winding is advanced in seconds, the winding start position shifts by about 5 mm in the vertical direction.

[Means for solving problems]

In view of this, the present invention aims to accurately position the winding at a predetermined winding start position with a simple operation. On the other hand, in a spinning machine that performs a building motion, the winding mechanism is equipped with a motor and a brake for raising and lowering the ring rail, and a position determination switch and a timer for detecting the lowering position of the ring rail are provided at appropriate locations to prevent winding onto the bobbin. As the ring rail coasts down to the winding start position after the end of the initial bunch winding, the timer is activated by the above-mentioned position determining switch installed at an appropriate location, and after the set time, the timer activates the brake on the lifting motor, and the ring rail is lowered. The gist of the present invention is to make it possible to select the setting time of the timer in order to regulate and stop the descent of the vehicle and to adjust the stopping position by the brake.

[Effect]

A timer is activated by a position determination switch that operates at the appropriate point on the way down of the ring rail after bunch winding, and when the time-up occurs, a brake is applied to the lifting motor, and the stopping position is determined by adjusting the time until the winding stops. Determining the starting position can be done accurately and easily.

〔Example〕

The drawing schematically shows a winding start position determining device in a spinning machine according to the present invention, in which a lifting device 1 for a ring rail R includes a lifting lever 2 that is swung by a heart cam 5, and a lifting lever 2 that is positioned at an appropriate position near the lifting lever 2. A winding mechanism 3 is provided for winding up the lifting belt 4 attached to the ring rail R and connected to the ring rail R. Lifting lever 2 has one end fixed to shaft 1
A cam roller 11 is rotatably supported on a shaft at an appropriate position and is opposed to a heart cam 5.

The winding mechanism 3 includes a winding drum 12 around which the belt 4 is wound, a main shaft 13 to which the winding drum 12 is attached, and a drive shaft 14 that rotates the main shaft 13. The drive shaft 14 has a saper wheel 15 fixed to its tip, and is connected to the main shaft 13 by a gear mechanism 16 provided at an appropriate location in the center. Further, the other end of the drive shaft 14 is connected to a lifting motor 17, and the lifting motor 17 is provided with an electromagnetic brake 18.

As is well known, the saper wheel 15 is equipped with a pawl feeding mechanism (not shown), and this pawl feeding mechanism is connected to a swinging arm 19 facing the lifting lever 2, and when the lifting lever 2 swings, the swinging arm 19 swings to rotate the saper wheel 15, rotate the winding drum 12 via the drive shaft 14 and main shaft 13, and gradually wind the belt 4. Furthermore, the pawl feeding mechanism is equipped with a pawl removing means, which enables the reverse rotation of the saper wheel 15 and the winding drum 12, and the lifting motor 1.
7 reverses rapidly down the ring rail RR.

In the figure, reference numeral 20 denotes a mounting base formed on the winding mechanism 3, which is mounted at an appropriate position on the machine frame via a suitable bracket (not shown). Further, 21 and 22 are guide pulleys for the lifting belt 4 attached to the lifting lever 2, and 25 is an electromagnetic clutch provided on the heart cam shaft 26.

The winding mechanism 3 is also equipped with a switch group 30 consisting of a plurality of cam switches on the main shaft 13 for issuing signals in response to the elevation of the ring rail R. Further, the winding mechanism 3, spinning machine drive motor (not shown), etc. are operated according to a program set in advance by a sequencer 31.

The winding start position determining device 40 of the present invention mainly includes a position determining switch 41 in the switch group 30 and a timer 42 in the sequencer 31. The position determining switch 41 is configured to terminate bunch winding at the start of winding and to operate at a suitable position during the descent of the ring rail, and will be explained below based on FIG. 2.

Figure 2 shows the procedure for raising and lowering the ring rail, especially the lowering of the ring rail and the start of winding when the pipe is full. As mentioned above, the lifting lever 2 swings due to the rotation of the heart cam 5, the saper wheel 15 rotates accordingly, and the lifting belt 4 is wound around the guide pulleys 21 and 22 provided on the lifting lever 2. , the ring rail R performs vertical swinging (traverse) and is successively pulled upward. When the tube is full, the stop claw for preventing reverse rotation of the saper wheel 15 is removed at point A, and the ring rail R starts to descend rapidly by the drive of the lifting motor 17, and the electric circuit of the driving motor of the spinning machine is released and shifts to inertia rotation, and when the lowest point B is reached, the clutch 25 is released, and the cam roller 11 is maintained in contact with the smallest diameter part (not shown) of the heart cam 5, and some of the tail thread is moved to the bobbin W. and stop at point C. Next, the ring rail R is raised to point D by driving the lifting motor 17, a doffing operation is performed, and an empty bobbin is inserted.

Next, at the time of starting, the lifting motor 17 is operated, the ring rail R is further raised again to point E, and the frame motor is driven near point H to perform bunch winding.
The above ring rail lowering when the pipe is full and bunch winding during startup are well known.

Next, when lowering the ring rail R to the winding start position, the lifting motor 17 is reversely rotated to lower the ring rail R. Accordingly, the position determining switch 41 attached to the main shaft 13 operates at point F, releases the electric circuit of the drive motor 17, and shifts to inertia descent. MS is a magnetic switch for opening electrical circuits. This point F is at least ring rail R
It is sufficient that the distance exceeds the winding start position G due to inertia, and there is no need to set it strictly.

Closing of the position determining switch 41 simultaneously activates a timer 42 in the sequencer 31, and after a set time has elapsed, that is, when the ring rail R has descended to the position corresponding to the winding start position G, the electromagnetic brake 18 is activated to stop the winding. The setting time of this timer 42 is determined experimentally. For example, if the ring rail R is to be lowered by 5 mm with a delay of 0.1 seconds as described above, the timer 42 is set in units of 1/100 seconds, and 42 time lag to 0 (0.01 seconds at the actual festival)
The lowering position of the ring rail R is measured as follows, and the set time of the timer is determined from the distance to the desired winding start position. The setting time of the timer can be easily set by simply inputting information into the sequencer 31.

As another embodiment, as shown in FIG. 4, when the positioning switch 41 is turned on at a proper point during the descent of the ring rail after bunch winding, the timer 42 is activated, and when the timer 42 times up, the lifting motor 17 is turned off. At the same time, the electromagnetic brake 18
The timer 42 is set in the same manner as in the previous embodiment.

〔Effect of the invention〕

According to the present invention, the winding start position is determined by first operating a switch at an appropriate position as the ring rail descends to release the electric circuit of the lowering drive motor to shift to inertial lowering, and then from the time the switch is operated, a timer is set. Since the brake is activated to stop the winding after the set time, it is possible to accurately obtain the predetermined winding start position, and the stop position is determined by selecting the set time of the timer in the sequencer. Fine adjustment is easy and reliable, and does not require skill.

[Brief explanation of the drawing]

The drawings show an embodiment of the winding start position determining device in the spinning machine of the present invention, FIG. 1 is a schematic explanatory diagram of the ring rail lifting device, FIG. 2 is a diagram explaining the procedure for lifting and lowering the ring rail, and FIG. 3 is an illustration of the ring rail lifting device. Schematic diagram, 4th
The figure is an explanatory diagram of another embodiment. 1 is a ring rail lifting device, 2 is a lifting lever, 3 is a winding mechanism, 17 is a drive motor, 18 is an electromagnetic brake, 40 is a winding start position determining device, 41
is a position determination switch, and 42 is a timer.

Claims (1)

[Claims] 1. In a spinning machine that performs a building motion on a ring rail using a lifting lever and a winding mechanism interlocked with the lifting lever, the winding mechanism is equipped with a motor and a brake for lifting and lowering the ring rail, and the winding mechanism is equipped with a motor and a brake for lifting and lowering the ring rail. A position determining switch and a timer are provided to detect the rail lowering position, and as the ring rail coasts down to the winding start position after bunch winding is completed at the beginning of winding on the bobbin, the timer is activated by the position determining switch installed at an appropriate location. After a set time, the timer applies a brake to the lifting motor to regulate the descent of the ring rail and stop it.In addition, the timer set time can be selected to adjust the stopping position by the brake. A winding start position determining device for a spinning machine, characterized in that: