JP2508794B2 - Rover spinning full pipe stop device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a full-roll stop device for a roving machine, and more specifically, to reduce the difference in roving winding length per bobbin when the full-roll is stopped. The present invention relates to a full pipe stopping device for a roving machine.

(Prior art) In recent years, labor saving has progressed in spinning factories, and one step has been taken from automation in each process, automation of connection between each process, conveyance is carried out, connection between rough spinning and spinning process There is also a proposal for automation of conveyance of the roving bobbin. Then, the roving yarn is conveyed between the roving and spinning processes in a state where the roving bobbin is suspended from a conveyer which is moved along a conveyer path generally installed on the ceiling (for example, Japanese Patent Laid-Open No. 50-76340). See JP-A-61-194228, etc.). In order to prevent sagging of the roving yarn due to vibration during conveyance of the roving yarn, it is preferable to stop winding during the descent of the bobbin rail. On the other hand, in order to reliably perform automatic cutting of the roving thread linked from the presser paddle of the flyer to the roving thread bobbin by lowering the bobbin rail after the winding is stopped, it is necessary to stop winding the roving machine while the bobbin rail is being raised. There is. Further, in the yarn splicing work after the completion of the roving yarn replacing work in the spinning process, it is desirable that the position of the roving yarn end is at a predetermined position in order to smoothly perform the yarn splicing work. Further, in recent years, it has been widely adopted to perform the roving change operation of the spinning machine all at once for the sake of automation and labor saving in the spinning process, and the amount of roving to be wound on one roving bobbin is fine spinning. It is necessary to set so that the number of yarns in the process is equal to a predetermined number.

On the gear end side of the roving machine base, as shown in Fig. 4,
A gear end lifter slide 1 capable of moving up and down integrally with a bobbin rail (not shown) is provided, a dog 2 is fixed to the lifter slide 1, and a limit switch 3 for detecting an overrun position is provided in a passage area of the dog 2. A position switch 4, a winding start position detection limit switch 5, a bobbin insertion position detection limit switch 6, and an overdown position detection limit switch 7 are arranged at predetermined positions to detect a required bobbin rail position. Has become. Conventionally, when the full pipe is stopped, a position provided at a substantially middle portion of the bobbin rail ascending / descending range at the time of winding after the full pipe signal is output from an automatic counter that counts the number of rotations of the front roller from the start of winding. The machine is stopped when the switch 4 is turned on.

(Problems to be Solved by the Invention) In the conventional full pipe stopping method, the stop position of the bobbin rail, that is, the position of the roving yarn end is constant due to the action of the position switch 4. The position of the bobbin rail at the time when the full signal is output from the auto counter is not constant due to an error or an error in the winding tension. Moreover, in a device that automatically cuts the roving yarn after stopping the full pipe, the position switch 4 is turned on when the dog 2 engages with the position switch 4 while the bobbin rail is being raised, and the roving yarn is cut by hand. In the case of a roving machine that is operated, the position switch 4 is turned on when the dog 2 engages with the position switch 4 while the bobbin rail is descending. Therefore, if the full signal is output while the dog 2 is moving in the direction in which the position switch 4 is turned on and is in the vicinity of the position switch, the position switch 4 is turned on immediately and the full signal is output. Although it takes a short time after the output to stop the machine base, the position switch 4 is turned on when the full pipe signal is output immediately after the dog 2 and the position switch 4 are disengaged while moving in the same direction. By the time the platform is stopped, the bobbin rail moves about one extra round trip. Therefore, the maximum length of roving wound on the bobbin is two layers. The diameter of the roving bobbin when fully loaded is approximately 15 cm, and the number of windings per inch of the bobbin is 9 to 10, so the roving length is about 2 layers.
It will be a considerable amount of 90m.

The object of the present invention is to stop the bobbin rail so that the position of the roving yarn end is always constant during the ascent and descent of the bobbin rail when the winding is stopped due to the full pipe, and to reduce the difference in the roving winding length. To provide a stop device.

(Means for Solving the Problems) In order to achieve the above object, in the present invention, a counter that counts the number of times the bobbin rail is moved up and down, and a detection device that detects whether or not the bobbin rail is present at a predetermined position. A stop signal output device that outputs a machine stop signal based on an output signal output when the count value of the counter reaches a predetermined set value and a bobbin rail detection signal of the detection device is provided.

(Operation) In the device of the present invention, the winding amount of the roving is set by the number of times the bobbin rail is raised and lowered, and when the count value of the counter that counts the number of times the bobbin rail is raised and lowered reaches a predetermined set value, a full pipe signal is generated. Is output. When the bobbin rail moves to a predetermined position after the full pipe signal is output, the detection device detects it and the stop signal output device outputs a machine stop signal based on the full pipe signal and the detection signal of the detection device, and The machine will be stopped. Therefore, the time until the bobbin rail stops after the full pipe signal is output is always constant, the winding amount of the roving yarn is almost constant, and the position of the roving yarn end is always constant.

(Embodiment) An embodiment embodying the present invention will be described below with reference to the drawings. The structure of the bobbin rail lifting mechanism (not shown) and the bobbin rail position detecting device are the same as those of the conventional device.
The position switch 4 acts as a bobbin rail detection device for stopping the full pipe. As shown in FIG. 2, a substantially rack-shaped bracket 9 is integrally movably fixed to the cut rack anchor bar 8 of the known building motion mechanism, and the cut rack anchor bar is attached to the lower surface of the bracket 9. A rod-shaped dog 10 that extends substantially parallel to 8
Has been fixed. One end of the cut rack anchor bar 8 is attached to a double anchor bar (not shown) that moves up and down together with the bobbin rail, and the other end side is meshed with the pinion 11, and swings around the pinion 11 as the bobbin rail moves up and down. To be done. The cut rack anchor bar 8 is horizontally arranged when the bobbin rail is located at the center of the ascending / descending region during the winding operation, and when the bobbin rail is tilted at a predetermined angle from the horizontal, a layer change mechanism (not shown) operates to move the bobbin rail in the moving direction. To switch. When the bobbin rail reaches the ascending end, the bobbin rail is arranged in the right downward direction as shown in FIG. 2, and when the bobbin rail reaches the descending end, the bobbin rail is arranged in the right upward direction. A limit switch LS1 is provided at a position where it can engage with one end of the dog 10 when the bobbin rail is at the rising end, and a position where it can engage with the other end of the dog 10 when the bobbin rail reaches the descending end. Is provided with a limit switch LS2.

As shown in FIG. 1, the ON signals of the limit switches LS1 and LS2 are the counters 12 and 13 of the controller 17 including the bobbin rail up counter 12, the bobbin rail down counter 13, the comparators 14 and 15, and the stop signal output device 16. Respectively,
The output signals of the counters 12 and 13 are input to the comparators 14 and 15, and the output signals of the comparators 14 and 15 are input to the stop signal output device 16. Further, the ON signal of the position switch 4 is input to the stop signal output device 16, and the stop signal output device 16 outputs the machine stop signal when the output signals from the comparators 14 and 15 and the position switch 4 are input. It has become. Each of the comparators 14 and 15 can set its set value to a predetermined value, that is, the number of times the bobbin rail is lifted and the number of times the bobbin rail is lowered to a full pipe in accordance with the spinning conditions.

Next, the operation of the device configured as described above will be described.
Prior to the operation of the machine, first set the set values of both comparators 14 and 15 to a value equal to the number of times of bobbin rail ascent and descent required to fill the pipe in accordance with the spinning condition, and then operate the machine. To start. During the spinning operation, the bobbin rail moves up and down within the range around the position switch 4. As the bobbin rail is moved up and down, the cut rack anchor bar 8 is swung about the pinion 11, and the dog 10 is also swung integrally therewith, so that the dog 10 moves in response to one reciprocation of the bobbin rail.
Is also rocked back and forth once. The bobbin rail starts winding from a position where the winding start position detecting limit switch 5 and the dog 2 correspond to each other. When the bobbin rail rises by a predetermined amount, the cut rack anchor bar 8 is lowered to the right as shown in FIG. 2, one end of the dog 10 engages with the limit switch LS1, and the ON signal is sent from the limit switch LS1 to the counter 1
Output to 2. Next, the bobbin rail is lowered and the cut rack anchor bar 8 is rotated counterclockwise around the pinion 11 in FIG. 2, and when the bobbin rail reaches the lowered position, the other end of the dog 10 is moved to the limit switch LS.
The limit switch LS2 is engaged with 2 and an ON signal is output to the counter 13. Both counters 12 and 13 count the number of times each time the bobbin rail moves up and down, and the comparators 14 and 15
Thus, it is determined whether or not the values of the counters 12 and 13 have reached a predetermined set value, and if the values have not reached the predetermined set value, the bobbin rail ascending / descending movement is repeated. When the number of times the bobbin rail is raised and lowered reaches a predetermined N times, output signals are output from the comparators 14 and 15 to the stop signal output device 16. After that, when the bobbin rail is further moved upward and the dog 2 is raised to a position where it engages with the position switch 4, the position switch 4 is turned on, and its output signal is a stop signal output device.
16 is output to the comparator 1,
A machine stop signal is output based on the output signals from 4, 15 and the position switch 4, and the machine is stopped. The length of the roving wound on the bobbin while the bobbin rail is moved up and down a predetermined number of times is substantially constant, and the spinning time is also a condition for moving the bobbin rail from the lower end of the bobbin rail to the position corresponding to the position switch 4. If they are the same, the length will be almost constant, so that the length of the roving wound on the bobbin by the time the machine stand is stopped will be almost constant. Further, the position of the bobbin rail when the machine stand stop signal is issued is always constant, so that the position of the roving yarn end is also constant.

Note that the present invention is not limited to the above-described embodiment, and for example, proximity switches, photoelectric switches instead of the limit switches LS1 and LS2 as a detection device that detects that the bobbin rail is arranged in the raised position and the lowered position. Etc. to detect the end of dog 10,
Instead of providing 10, the position of the cut rack anchor bar 8 may be detected and its signal may be output to the counters 12, 13. When counting the number of times of ascent and descent, instead of counting both the number of times of ascent and descent, only the number of times of descent may be counted. Further, as a detecting device for detecting whether or not the bobbin rail is present at a predetermined position, there is a Japanese Patent Laid-Open No.
No. 21928, a moving member that moves as the bobbin rail moves up and down, a detector that continuously detects the motion of the moving member, and a bobbin rail based on an output signal of the detector. A bobbin rail position detection device that calculates the position of may be adopted. If the roving yarn is not automatically cut, the winding of the roving yarn may be stopped when the bobbin rail is moved downward.

(Effects of the Invention) As described in detail above, according to the present invention, a full pipe signal is always output at the lowered position of the bobbin rail, and the machine stand stops after the bobbin rail moves by a predetermined amount, so that the doffed coarse In the yarn bobbin, the position of the roving yarn end is constant and the roving yarn winding length per bobbin is substantially constant, so that the amount of residual roving yarn remaining on the residual roving yarn bobbin after roving replacement can be minimized.

[Brief description of drawings]

FIG. 1 is a block diagram of an apparatus embodying the present invention, FIG. 2 is a schematic view of a main part of a building motion mechanism, FIG. 3 is a flow chart showing the action, and FIG. 4 is a schematic view of a bobbin rail position detection device. Is. Dog 2, position switch 4, cut rack anchor bar 8, dog 10, counter 12, 1 constituting the detection device
3, comparators 14 and 15, stop signal output device 16, limit switches LS1 and LS2.

Claims (1)

(57) [Claims] 1. A counter for counting the number of times the bobbin rail is moved up and down, a detection device for detecting whether or not the bobbin rail is present at a predetermined position, and a counter when the count value of the counter reaches a predetermined set value. A full pipe stopping device for a roving machine, comprising: a stop signal output device that outputs a machine stand stop signal based on an output signal output and a bobbin rail detection signal of the detection device.