JPH0678155B2 - Roving position detector - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roving position detecting device for detecting a roving tension during spinning in a roving machine as a position of a roving extending between a front roller and a flyer top.

2. Description of the Related Art In a conventional bobbin reed type roving machine, when winding a twisted roving in layers on a bobbin, the winding speed of the roving is always the same as the spinning speed from the drafting device. For this reason, a speed change mechanism with a pair of cone drums is incorporated in the drive system of the bobbin, and the belt wound around the pair of cone drums of the speed change mechanism is moved by a predetermined amount for each layer of the package to rotate the bobbin. The number is gradually reduced for each layer.

However, the winding speed of the roving yarn for each layer of this package is not simply proportional to the number of roving yarn layers, and spinning of fiber type, fiber characteristics, roving yarn count, twist number, pressing force of presser, etc. It varies slightly depending on the conditions. Therefore, with one kind of cone drum pair designed on the basis of a specific spinning condition, the winding speed of the spin for each layer of the package is always the same as the spinning speed for a wide range of spinning conditions. It was practically difficult to do. Therefore, the number of teeth of the ratchet wheel as the drive source of the shifter that feeds the pair of cone drums is set to be smaller than the predetermined number by about one tooth, and this belt is fed slightly more so that the roving yarn on the way of winding is slackened. None, when this slack is accumulated, it is detected by photoelectric means and the control motor is energized for a short time, and this control input is applied to the gear train from the gear that meshes with the rack rod of the shifter to the ratchet wheel. To correct the bobbin speed by slightly returning the feed of the bobbin (Japanese Patent Publication No. 51-22532).
No.) etc. have already been proposed.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above-mentioned prior art, since the photoelectric means detects the slack yarn position in a specific slack state, it is necessary to finely detect the roving yarn position vibrating between the front roller and the flyer top. I can't. Therefore, there is a problem that the roving position corresponding to the tension cannot be detected even when the tension becomes high or a minute tension fluctuation occurs.

Means for Solving the Problems The present invention, as shown in FIG. 1, is a means for calculating a roving thread tension state from the roving thread position, and a correction signal so as to be appropriate if the calculated roving thread tension is not appropriate. In order to provide a suitable roving position detecting device in combination with a device for changing the bobbin rotation speed by means of this correction signal, the bobbin lead-type roving machine can adjust the roving winding speed to that of the roving. It is used for a device that controls on the basis of tension, and a light projecting means is arranged on one side and a light receiving means is arranged on the other side across the vertical vibration space of the roving that extends between the front roller and the flyer top. In the roving position detecting device, which is provided to detect the height position of the roving depending on whether or not the light receiving means receives the light projected by the light projecting means, the roving upper and lower vibrating spaces are sandwiched and face each other. A pair of support arms Inside the other support arm, a large number of light receivers each having a size capable of shielding one roving yarn from light are arranged in a row in the vertical oscillation direction of the roving yarn at intervals smaller than the thickness of one roving yarn. The light receiving means is composed of a large number of light receiving devices arranged in a row, and the vibration position of the roving yarn vibrating up and down can be continuously calculated by the digital signal from each light receiving device of the light receiving means. It has a feature.

The roving yarn always vibrates vertically due to the spinning operation, but the vertical vibration position changes depending on the tension of the roving yarn. Since the roving yarn that vibrates up and down always blocks the light entering any one of the light receivers of the light receiving means at the height position at any given time, the roving yarns of the roving yarns that are arranged in a row are arranged at different positions. The height position at the time can be detected as a digital signal. The size of each light receiver is extremely small so that it can be shielded by a single roving thread, and a large number of these light receiving elements are arranged in rows in the vertical vibration direction of the roving thread at intervals smaller than the thickness of the roving thread. Because of this, it is possible to accurately detect the height position of the roving thread that is vertically vibrating. By connecting the light receiving means to the calculating means of the roving winding speed control device, the vibration position of the vertically oscillating roving yarn can be continuously calculated, and minute fluctuations in the roving tension can be reliably detected and the roving yarn can be detected reliably. The tension can be controlled with high accuracy.

First Embodiment In a bobbin reed type roving machine shown in FIG. 2, a driving shaft 5 is driven from a main motor 1 through V pulleys 2 and 3 and a V belt 4, and a twist change gear 6 is driven from the driving shaft 5. Gear train 7 incorporated
The front roller 8 of the drafting device is driven via. In addition, a top shaft for driving the flyer from the driving shaft 5 via the pulleys 9 and 10 and the timing belt 11.
12 is driven, and the gear 13 fixed to this top shaft 12
Engages with a gear 15 attached to an upper support type flyer 14 to drive the flyer 14 at a low speed. On the other hand, the gear 16 fixed to the driving shaft 5 is the external gear of the differential gear mechanism 17.
A chain 22 is wound between a chain wheel 20 and an intermediate chain wheel 21 that mesh with 18 and are provided on the shaft end of a rotary plate 19 of the differential gear mechanism 17, and between the chain wheel 21 and another chain wheel 23. A chain 24 is wound around, a gear 25 coaxial with the chain wheel 23 meshes with a gear 27 of a bobbin shaft 26, and a gear 28 on the bobbin shaft 26 meshes with a bobbin wheel 29 that drives a bobbin 30, A constant speed drive mechanism is configured to drive the bobbin 30 at the same rotation speed as the flyer 14 if there is no rotation input of the input shaft 39 described later. A top cone drum 34 is fixed to the top cone drum shaft 33 to which the intermediate gears 31 and 32 of the gear train 7 are fixed,
A belt 36 is wound between the top cone drum 34 and a bottom cone drum 35 which is axially supported below the top cone drum 34, and an output shaft 37 of the bottom cone drum 35 of the differential gear mechanism 17 via a gear train 38. A rack 42 is connected to a belt shifter 41 for moving the belt 36, which is connected to a gear 40 attached to an input shaft 39, and the rack 42 is connected to a vertical shaft.
It meshes with the external gear 45 on the output side of the differential gear mechanism 44 mounted on 43. The external gear 45 is integrally provided with a disc 45a on the upper part thereof, and the shaft of the sun gear 44a penetrates through the external gear 45 to project downward to be integrally configured with a bevel gear 71a described later to form the external gear 45. It is possible to rotate relative to this, and further this sun gear
The vertical shaft 43 penetrates the central portion of 44a and the like, and is rotatable relative to the sun gear 44a and the like. Vertical shaft 43 is further internal gear 44b
The internal gear 44b and the sun gear 44a are linked by a planetary gear 44c. Further, the vertical shaft 43 is biased in the direction of arrow A in the figure via the pulley 46, the rope 47 and the weight 48 fixed to the upper end of the vertical shaft 43, and the vertical shaft 43 is biased via the gear train 49 at the lower end. Claw wheel 50 and claw 5 connected
Rotation is regulated by 1, 52, and the claws 51 and 52 are engaged and disengaged with the claw wheel 50 alternately at both ends of the package molding by interlocking with a known molding device (not shown).
43 is a bobbin rail (not shown) due to the urging force of the hanging weight 48.
At both ends of the up and down movement of the
By the rotation of the vertical shaft 43, the rack 42, the belt shifter 41, and the belt 36 are intermittently sent from the left side to the right side in FIG. 2 by a predetermined amount via the differential gear mechanism 44 and the external gear 45, and the roving is wound. To increase the bobbin rotation speed for package molding
A normal bobbin transmission device 53 is constructed in which the roving speed of the roving is gradually reduced to a predetermined amount for each layer so that the roving speed is the same as the spinning speed from the front roller 8. Thus the flyer
The bobbin 30 mounted between the bobbin wheel 14 and the bobbin wheel 29 winds roving with a constant speed portion (same rotation speed as the flyer) driven by a constant speed drive mechanism from the gear 16 of the driving shaft 5 to the bobbin wheel 29. To increase the speed, the increased speed driven by the bobbin transmission 53 is combined by the differential gear mechanism 17, rotates at a higher speed than the flyer 14, is spun from the front roller 8, and twisted by the flyer 14 in front of it. The roving 55 thus formed is wound in layers as the bobbin rail moves up and down to form a predetermined package. Incidentally, 54 is a known bobbin rail lifting device for lifting the bobbin rail.

Next, 56 in FIGS. 2 and 3 is a roving position detecting device provided between the front roller 8 and the flyer top 14a of the drafting device. This roving position detecting device 56 is used for the front roller 8 and the flyer top. On both sides of the roving 55 which vibrates between 14a, the vertical direction of vibration of the roving 55 (arrow direction B in FIG. 3)
In a plurality of projectors 57a having different distances from the roving 55 to the optical axis (FIG. 3 shows the case of 10 pieces on each side).
... and the light receivers 58a are adjacent to each other as shown in FIG. 3 so that the vibration positions of the roving yarns can be continuously detected. One row or two rows are addressed (the illustrated example shows the case of two rows). )
It is located opposite to. The light receiver 58a vibrates 1
Light from the projector 57a is blocked by the roving 55 of the book, and a large number of photoelectric detectors (57a,
By virtue of 8a), the vibration position in the vertical direction of the vibration generated in the roving 55 between the front roller 8 of the drafting device and the flyer top 14a at the side of the vertical vibration space of the roving 55 is continuously detected. There is. Light projecting means comprising a plurality of light projectors 57a of small photoelectric detectors arranged in a row as described above,
As shown in FIG. 2, the light receiving means formed by arranging a plurality of light receivers 58a of small photoelectric detectors in a row is a pair of members that stand up and are connected at the lower end with the vertical vibration space of the roving thread interposed therebetween. Are provided to be opposed to the support arm (reference numeral omitted).
In this roving position detecting device 56, the number of photoelectric detectors is increased, and the interval of each photoelectric detector in the direction B in FIG. 3 is set to be as small as possible. It is preferable to more accurately detect the vibration position of.
Therefore, as the photoelectric detector, in addition to the above-mentioned light emitting / receiving device, an image sensor capable of reducing the distance between the light receiving devices or a photoelectric detector using an optical fiber may be used. Also,
The photoelectric detectors (57a, 58a) of this roving position detecting device 56 are
Since this is for detecting the vertical vibration position of the roving 55, the distance from the roving 55 to the optical axis in the direction B of the arrow in FIG. 3 may be different. Therefore,
The arrangement direction and installation position of the photoelectric detectors (57a, 58a) are not limited to the illustrated example. Further, the roving position detecting device 56 does not need to be provided on the whole spindle of the roving machine, and the roving machine 1
It may be installed in one weight or two to three weights with respect to the base.

Next, 59 is a well-known microcomputer, which mainly has a CPU 60, a ROM 61, a RAM 62, an input / output port 63, 6 as shown in FIG.
4, consists of I / O interface 65, bus line 66
Connected through. A detection signal from the photoelectric detectors (57a, 58a), that is, a signal indicating which photoelectric tube is shielded from light is input to the input port 63. The I / O interface 65 is used for bobbin forming operation of a bobbin rail (not shown). Related to this, a limit switch 67 arranged to output a tension detection signal for starting detection of the photoelectric detectors (57a, 58a) and a correction command for starting correction at an appropriate intermediate portion except the bobbin rail up / down switching position. A limit switch 68 arranged to output a signal is connected, and the signal from this is input to the input port 63.

Next, the correction device 69 will be described. 70 is a control motor, 7
Is a bevel gear wedged to the output shaft of this control motor, and 71a is a bevel gear that is loosely fitted to the vertical shaft 43 of the differential gear mechanism 44 of the bobbin transmission 53 and meshes with the bevel gear 71. Gear 44
Rotating integrally with a, the rotation of the control motor 70 is transmitted to the sun gear 44a. Reference numeral 72 is a known motor controller connected to the I / O interface 65, which turns the control motor 70 on and off and reverses it in the normal direction based on the calculation result (correction value) in the microcomputer 59. ing. 73 is an encoder that detects the rotation of the control motor 70 and generates a pulse signal according to the rotation amount,
This pulse signal is counted up to the correction value in the microcomputer and the motor controller 72 is turned off.

In the above configuration, the operation of the normal bobbin transmission 53 will be described first. When the operation of the roving machine is started, the fiber bundle spun from the front roller 8 of the drafting device is twisted by the constant-speed rotating flyer 14 into the roving 55, which is faster than the flyer 14. A bobbin 30 that rotates and moves up and down as a bobbin rail (not shown) moves up and down is wound into layers and molded into a predetermined package.
From the winding start of the package molding to the full pipe, every time the bobbin rail (not shown) reaches its ascending end and its descending end, the pawl 51 operates in conjunction with a known forming device (not shown). The bobbin transmission 53
The ratchet wheel 50 is rotated by a predetermined amount in the arrow A direction by the urging force of the weight 48, and the ratchet wheel 50 is rotated by the gear train 49, the vertical shaft 43, and the differential gear mechanism 44 to the external gear 45. Rotates in the direction of arrow A,
By rotating the external gear 45, the rack 42 and the belt shifter 41
Belt wound between upper and lower cone drums 34, 35 via
36 moves from the left side to the right side in FIG. 2 by a predetermined amount, and the movement of the belt 36 causes the number of rotations of the bobbin 30 to be 1
The speed is reduced by a predetermined amount for each layer.

Next, the operation of the correction device 69 will be described with reference to the flowchart shown in FIG. When the power of the machine is turned on, the program starts at the same time, and when the tension detection signal is attached in relation to the molding operation or is input from the limit switch 67 in step P1, the photoelectric detector number is set for a certain period in step P2. n (n = 1, 2, 3, ...
RA corresponding to the photoelectric detection number n
Write the light-blocking frequency (or light-blocking time) Sn (n = 1, 2, 3, ...) Based on the position detection signal from the corresponding photoelectric detector, which is blocked by one roving, to the memory address in M62. Next, in step P3, an expression is calculated from the photoelectric detector number n and the light shielding frequency (or light shielding time) Sn for each photoelectric detector. (K is the number of sets of photoelectric detectors, k = 10 in this embodiment), and the average central position of the vibration in the vertical direction is calculated as representing the tension state of the roving. In step P4, the average center position is preset and the deviation value (X ₀ −) from the reference set position (set value) X ₀ stored in the ROM and the correction coefficient C are used to calculate the following equation 1 = C (X ₀ −) Then, a correction value 1 corresponding to the correction amount of the bobbin rotation speed is calculated. The correction coefficient C is so-called sensitivity and is set in advance so that the average center position quickly approaches the reference set position X ₀ . When a correction command signal is input in step P5, a correction signal based on the correction value 1 is output in step P6. The output correction signal is transmitted to the motor controller 72,
The motor controller 72 uses the correction signal to control the motor 70.
To reverse. The rotation amount of the control motor 70 is converted into a pulse signal by the encoder 73, and when the control motor 70 rotates by the amount corresponding to the correction value l, the control motor stop signal is output. When the control motor 70 rotates in this manner, the external gear 45 of the bobbin transmission 53 rotates in the normal or reverse direction via the bevel gears 71, 71a and the differential gear mechanism 44, and the belt 36 is racked.
2 and the belt shifter 41 to the right or left side in FIG. 2 to reduce or increase the rotation speed of the bobbin by a correction amount corresponding to the correction value l.
The roving tension up to 30 is corrected. Therefore, by repeating the correction of the bobbin rotation speed, the roving thread tension from the winding start of the package molding to the full tube is always a proper constant value.

EFFECTS OF THE INVENTION As described above, according to the present invention, the light receiving means is configured by arranging a large number of light receivers having a small size capable of blocking light with one roving thread in a row at intervals smaller than the thickness of the roving thread. The height position of the roving thread that vibrates up and down can be continuously detected as a digital signal by the permutation position of each light receiver, and as a result, minute fluctuations in the roving thread tension can be accurately detected, and the roving winding speed can be detected. Can be controlled with high accuracy, and a roving yarn having a uniform thickness can be always spun out and a good package can be formed. In addition, the height position of the roving thread that vibrates up and down can be detected continuously by the permutation position of each photoreceiver, so the height position of the roving thread can be set arbitrarily and finely depending on the permutation position of the photoreceiver. Can be adjusted almost steplessly. Even if the height position of the vertically oscillating thin roving yarn can be continuously detected, a large number of small light receivers that can shield light with one roving yarn are arranged in rows at intervals smaller than the thickness of the roving yarn. Since the light receiving means is provided by arranging in the above, the entire device can be made extremely small and can be efficiently arranged in a narrow position sandwiching the vibration space of the roving.

[Brief description of drawings]

FIG. 1 is a functional block diagram, FIG. 2 is an overall view of a roving machine, FIG. 3 is a side view of a roving position detecting device, FIG. 4 is a configuration diagram of electronic parts, and FIG. 5 is a flowchart. 8: Front roller, 14: Flyer, 14a: Flyer top, 55: Coarse thread, 56: Coarse thread position detection device, 59: Microcomputer, 70, 70A: Control motor, 72: Motor Controller

Continuation of the front page (56) Reference JP-A-55-116206 (JP, A) JP-A-59-31638 (JP, A) JP-A-57-117449 (JP, A) Actual development Sho-54-13854 (JP , U) Japanese Patent Publication Sho 56-25525 (JP, B1) British Patent 946240 (GB, A)

Claims (1)

[Claims] 1. A bobbin reed type roving machine used for a device in which a roving winding speed is controlled based on a tension of the roving, and a vertical vibration space of the roving extending between a front roller and a flyer top. The light emitting means is arranged on one side and the light receiving means is arranged on the other side so that the height position of the roving is detected depending on whether or not the light receiving means receives the light emitted by the light emitting means. In a certain roving yarn position detecting device, a pair of support arms that face each other across the vertical vibration space of the roving yarn are provided, and a small light receiver of a size capable of shielding light with one roving yarn is provided inside one of the support arms. A large number of roving yarns are arranged in a row in the vertical vibration direction at intervals smaller than the thickness of one roving yarn, and a plurality of light receiving devices in the row form light receiving means. The oscillating position of the roving that is vibrating up and down is continuously Computable configured to made the roving position detecting device.