JPH03113020A - Apparatus for automatically controlling unevenness of carded sliver - Google Patents

Abstract

PURPOSE:To prevent occurrence of unevenness of sliver by measuring weight of sliver, calculating accurate Grain value of sliver and controlling amount of raw stock to card. CONSTITUTION:Coarseness of sliver S fed out from doffer 7 is measured by measuring roller 22 and Grain is measured by a weighing meter 34 and compared with a standard Grain. Ratio thereof is added to signal for detecting change of coarseness followed by oscillation of measuring roller to control revolution numbers of feed roller 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an automatic control W device for erasing thickness irregularities of the sliver fed out on a card, particularly long-period irregularities (hereinafter referred to as large irregularities).

[Conventional technology]

In general, raw cotton is supplied to the card by opening it in a supply device such as a cotton mixing machine and transporting it by air flow.
Accumulates in the reserve tank provided on the card supply side,
A means of sequentially supplying it as a wrap is adopted. However, in this case, uneven supply is unavoidable, and for this reason, a method is adopted in which the thickness of the sliver produced by opening the card is measured and the supply of the wrap is regulated.

One example of this is disclosed in Japanese Utility Model Application No. 5-46612, the outline of which is shown in FIG.

In the figure, the above-mentioned reserve tank 101 is provided on the lap supply side of the card 100, and the card 100 is supplied from below in the form of a lap to the feed roller 102, and the feed roller 102 supplies the card at a predetermined speed to the take-in roller 103. The sliver S is fed out by the coiler 105. A coiler 10B grips the sliver S and feeds it into the can 107 in the form of a coil.

The spot removing means 110 of the sliver S is a dosing member 104.
The measuring roller 111 is provided with a measuring roller 111 for measuring the thickness of the sliver S fed out from the measuring roller 111.
The vertical movement caused by the variation in the thickness of the sliver is detected by the potentiometer 112, and the bimit motor 115 of the continuously variable transmission 114 provided in the drive circuit 113 of the feed roller 102 is activated to adjust the rotational speed of the feed roller 102, that is, the lap feed speed. This is to prevent the occurrence of sliver spots.

[Problem to be solved by the invention]

However, even if the thickness of the sliver is constant, the gelation value of the sliver varies depending on the type of raw fiber, especially temperature and humidity, etc., and it is difficult to remove the spots with the above-mentioned spot removing means.

In view of this, the present invention measures the weight of the sliver,
The purpose of this is to calculate the accurate gelation value of the sliver, regulate the amount of raw cotton for the card, and prevent the occurrence of unevenness in the sliver.

[Means to solve the problem]

In order to achieve the above object, the sliver unevenness automatic control device of the present invention includes a measuring roller for measuring the thickness of the sliver placed behind the dot of the card, and a sliver thickness fluctuation detection signal from the measuring roller is used to detect the supply lap. The sliver weight control mechanism includes a sliver thickness control mechanism that regulates the amount, and a sliver weight control mechanism that measures the unit length weight of the sliver fed out from the measuring roller, and the sliver weight control mechanism includes a receiving gutter that receives the fed out sliver;
Equipped with a weighing scale that measures the weight of the sliver stored in this receiving gutter, and comparing the measured value with the standard value,
The ratio is added to the sliver thickness variation detection signal.

In this case, it is preferable to arrange a draft mechanism between the measuring roller and the receiving gutter, and to regulate the draft amount by a sliver thickness variation detection signal from the measuring roller to which a weight variation detection signal from the weighing scale is added.

Further, a nip roller is provided between the receiving gutter and the coiler roller of the sliver can, and a two-stage speed change means is provided to change the sliver feeding speed by the nip roller to a lower speed and a higher speed than the sliver feeding speed to the receiving gutter, so that the sliver feeding speed by the nip roller is lower and higher than the sliver feeding speed to the receiving gutter. It is advantageous that the required amount of sliver weight can be measured without interrupting the operation of the card by accumulating the sliver and paying out the accumulated sliver by rotating at high speed.

Further, in this case, it is preferable that the receiving trough is provided with a zero detection means for detecting when the feeding of the stored sliver is completed, and that the rotation of the nip roller is switched to the low speed side when the feeding is completed.

Further, a rotation speed detector of the drive shaft of the draft roller is provided to detect the amount of sliver accumulated in the receiving gutter, and the weighing amount can be detected by the weighing scale based on a signal from the detector that reaches a predetermined rotation speed. preferable.

It is also preferred that the coiler roller is driven in conjunction with the nip roller, and that the coiler roller is faster than the nip roller to impart a draft to the sliver.

Furthermore, a measuring roller for measuring the thickness of the sliver is arranged behind the docker for each of the group of cards to which the spread raw cotton is distributed and supplied by the air flow, and the sliver thickness variation detection signal of the measuring roller is used to detect the sliver thickness. Equipped with a sliver thickness control mechanism to regulate the amount of wrap, any one
The card on the stand is equipped with a sliver weight control mechanism that measures the unit length weight of the sliver fed out from the measuring roller. The sliver weight control mechanism can also apply a sliver weight fluctuation signal to the sliver thickness control mechanism of each card.

[For production]

In addition to measuring the thickness of the sliver drawn out from the dower, the gel is measured and compared with a standard gel. Then, the ratio is added to the sliver thickness variation detection signal caused by the swinging of the measuring roller, and the rotation speed of the feed roller is controlled. This effectively prevents the occurrence of sliver spots.

〔Example〕

FIG. 1 is a schematic explanatory diagram of the present invention. As is well known, the card 1 includes a reserve tank 2 for accumulating opened raw material *fibers, a pair of feed rollers 3 disposed close to the lower outlet of the tank 2, a feed roller 4, a take-in roller 5, a cylinder 6, and a dosing roller 7. are arranged sequentially. 8 is a coiler, 9 is a coiler roller, and 10 is a sliver can. The sliver S fed out from the docker 7 is pulled out by the coiler roller 9 and stored in the can 10 in a coiled form.

Reference numeral 20 denotes a backslash movement control device for the sliver S fed out from the docker 7, which includes a measuring roller 22 that is placed behind the docker 7 to collect and hold the sliver S, and detects the rise and fall of this roller due to changes in the sliver thickness. A sliver thickness control mechanism 21 is equipped with a detector 23 such as a potentiometer, and controls the number of rotations of the feed roller 40 based on the output signal of this detector, and measures the unit length weight, that is, gelatin, of the sliver S to be fed out, and detects the above-mentioned. Vessel 23
The sliver weight control mechanism 30 corrects the signal from the sliver weight control mechanism 30.

The sliver thickness control mechanism 21 includes a continuously variable transmission 25 connected to a side shaft 24 connected to the drive system of the feed roller 4, for example, the drive side of the docker 7.
5 is connected to the feed roller 4 via the side shaft 24', and the pilot motor 26 of the continuously variable transmission 25 is operated by the sliver thickness variation detection signal from the detector 23, and the rotation speed of the output side is controlled. It is designed to change the The operation in this case is the same as that of the well-known structure, and the explanation will be omitted. However, 27 is a control mechanism.

The sliver weight control mechanism 30 includes a receiving gutter 31 for temporarily storing the sliver S between the measuring roller 22 and the coiler roller 9, and if necessary, a draft mechanism is provided between the measuring roller 22 and the receiving gutter 31. 33 will be deployed.

This draft mechanism 33 has a first draft roller Dl and a second draft roller Dl.
a first draft roller D1;
The rotation of the sliver S is kept constant, and the second draft roller D2 is selectively set at high speed to apply a required draft to the sliver S.

The receiving gutter 31 is placed on an electric scale 34, and the signal from this scale is compared with a standard weight by a comparison calculation mechanism 35, and the ratio is used as a weight fluctuation detection signal to be sent to the detector of the measuring roller 22. It is added to the signal of 3.

Furthermore, a nip roller 36 is provided between the receiving gutter 31 and the coiler roller 9. The nip roller 360 rotation means includes a two-stage transmission means 37 (FIG. 2) which switches between two stages: a low-speed rotation that is slower than the speed of the sliver S fed out from the doffer 7 and the draft mechanism 33, and a high-speed rotation that is faster than the sliver speed. Be prepared.

Further, a rotation speed detector 38 is provided which detects the amount of sliver delivered from the draft mechanism 33 and issues a signal when a predetermined amount of sliver is delivered. As a result, the accumulation and measurement of a predetermined amount of sliver S in the receiving trough 31 and the feeding out of the accumulated sliver are performed repeatedly in sequence.The structure thereof will be explained based on FIG. 2.

Reference numeral 40 denotes a drive shaft, which is connected to the drive mechanism of the docker 7. Measuring roller 22 and draft mechanism 33
The first draft rollers D1 are connected to the drive shaft 40 via a first gear group 41 so as to rotate at a constant predetermined speed. Further, the drive shaft 42 of the first draft roller DI and the second draft roller D2 are connected via a second gear group 43 including a first clutch C1. This second draft roller D2 is attached to a first intermediate shaft 44, and a timing pulley 45 equipped with a second clutch C2 is inserted into this first intermediate shaft 44, and this pulley is driven by a timing belt 46 to change speed. It is connected to motor ES.

This first. The second clutches C1 and -C2 are interlocked and act in opposite directions; when the clutch CI is engaged, the second clutch C2 is released and the first clutch C2 is released. The second draft rollers Di and D2 are both driven by the drive shaft 40, and when the clutch C1 is released and the clutch C2 is engaged, the first draft roller Di is driven at a constant speed by the drive shaft 40, and the second draft roller D2 is driven at a constant speed by the drive shaft 40. It is connected to a drive motor ES so that its speed can be changed.

The first intermediate shaft 44 is equipped with the rotation speed detector 38 described above. This detector 38 consists of a rotary plate 47 attached to the first intermediate shaft 44 and a proximity switch 48 installed opposite thereto. Calculate.

Further, a nip roller 36 is connected to the first intermediate shaft 44 via a two-stage transmission means 37. This two-stage transmission means 37 has a small gear 50 and a large gear 51 attached to the first intermediate shaft 44,
A second intermediate shaft 52, which is disposed parallel to the first intermediate shaft 44, has a first driven gear 53 with a third clutch C3 and a second driven gear 54 with a fourth clutch C4 attached thereto, and intermediate gears 55, 56, respectively. via the small gear 50. Big gear 5
Connect to 1. Further, this second intermediate shaft 52 is connected to the 31st vehicle group 5.
It is connected to the nip roller 36 and the coiler roller 9 via 7. This third. The fourth clutches C3 and C4 are interlocked and act in opposite directions, and when the clutch C3 is engaged, the fourth clutch is released and the nip roller 36. The coiler roller 9 is rotated at a low speed by a small gear 50, and when the fourth clutch C4 is engaged, the third clutch C3 is released, and each of the rollers 36 and 9 is rotated at a high speed by a large gear 51. In this case, the circumferential speed of the nip roller 36 by the small gear 50, that is, the speed at which the sliver S is fed out, is set to be slightly slower than the speed V at which the sliver S is fed out from the draft mechanism 32 (for example, 2/3 V).
Also, when driving by the large gear 51, the feeding speed is set to be slightly faster than the above-mentioned feeding speed V (for example, ?/6V).

In addition, 60 is a means for detecting zero of the amount of sliver stored in the receiving trough 31, which is composed of a phototube, etc.
! It is designed to detect when it is completely pulled out from 31 and floats up.

Next, the operation of the automatic sliver spot control device in the above configuration will be explained based on FIG. 5.

First, by turning on the start button, the card l will start at low speed.
At the same time, the power supply circuit of the control device 20 is also turned on. At the same time, the doffer 7 is activated as shown in FIG. The first draft roller D1 is also rotated. Further, the control device 20 turns on the first clutch CI, turns off the second clutch C2, and turns the second draft roller D2 into the first clutch.
It rotates at approximately the same speed as the draft roller D1. At the same time, the variable speed drive motor ES is turned on, the third clutch is turned on, and the fourth clutch is turned off, and the nip roller 36. The coiler 9 is also operated at low speed and the sliver S is kissed, and then the card is switched to high speed operation (normal operation). At the same time, the clutch C1 is turned OFF, the clutch C2 is turned ON, and the second draft roller D2 is driven by the variable speed drive motor ES. At the same time, turn 3rd clutch C3 OFF, 4th clutch C
4 is turned on, the nip collage 36 side is operated at high speed by the large gear 51, and the sliver S is sent out at a speed faster than the feeding speed by the draft mechanism 32. When the sliver S in the receiving gutter 31 becomes zero, the zero detection means 60 This is detected by This detection signal causes the clutch C3 to
C4 is switched, the nip roller 3G is operated at low speed by the small gear 50, and the accumulation of the sliver S in the receiving gutter 31 is started. At the same time, the rotation speed detector 38 starts counting. The relationship between this count number and the accumulated length of the sliver S is measured in advance. On the other hand, sliver S in the receiving gutter 31
is measured by a weighing scale 34, and a weight increase signal accompanying an increase in the amount of sliver S is applied to a comparison calculation mechanism 35. When a sliver S of a predetermined length is accumulated,
From the third day of the rotation speed detector, a count end signal is applied to the calculation mechanism 35, which measures and compares it with a standard value. The variation rate (%) resulting from this comparison is applied to the signal of the detector 23 of the measuring roller 22. 27 is a control mechanism that receives the signal from the detector 23 and the signal from the comparison and calculation mechanism 35;
regulates the rotational speed of the feed roller 4 based on both signals.

On the other hand, in response to the count end signal, the third and fourth clutches C3 and C4 are switched again, and the nip roller 36
The side shifts to high-speed operation using the large gear 5], and the sliver S in the receiving trough 31 is fed out at a speed faster than the feeding speed by the draft mechanism 33, and when the accumulated amount reaches zero, the third. The fourth clutches C3 and C4 are switched,
Accumulation of the sliver S in the receiving gutter 31 is started. Repeat this below.

Note that the signal from the control mechanism 27 is transmitted to the variable speed drive motor E.
S is also applied, and the motor ES adjusts the rotation speed of the second draft roller D20 according to the thickness of the spun sliver,
The sliver is designed to always deliver a sliver of constant gel as much as possible.

In addition, when measuring with the receiving gutter 31, the draft mechanism 33
is not necessarily required.

The reason for this will be explained based on FIG. FIG. 5(a) shows an example of the actual measured value of the spinning gel when the draft mechanism 33 is omitted, and FIG. That is, as shown in FIG. 2(a), the spun gel of the sliver fed out from the doffer has large irregularities. Therefore, in order to measure the average sliver, it is necessary to measure a considerably long sliver, and the receiving gutter becomes large.

On the other hand, when a draft mechanism is provided, the unevenness of the spun gel is small, and therefore the average gel can be measured by measuring a relatively short sliver, which has the effect of making the receiving trough smaller.

However, if it is possible to increase the size of the receiving gutter 31, the draft mechanism may be omitted.

Next, it is preferable to add a slight draft to the sliver S between the nip roller 36 and the coiler roller 9.
This has the disadvantage that when stored in the can 10 without adding a draft, natural elongation occurs. 1 of the actual measurement value
An example is shown in FIG. 4, which shows the elongation amount and elongation rate of a 40 yard sliver fed at a speed of 70 yards/rain. However, SO is the sliver when the nip roller is omitted and the sliver is fed directly by the coiler roller. 81 is the sliver with a nip roller and draft added.
These are the measurement results for 8 leaps. In either case, by providing a nip roller and adding a draft, subsequent elongation can be suppressed.

Next, FIG. 6 shows another embodiment. It is preferable that the sliver weight control mechanism 30 is provided for each card, but if the method is to supply spread raw cotton to a group of cards by air flow, the tendency for disaster to occur will be the same for each card. In view of this, the sliver weight control mechanism may be provided in only one arbitrary card, and the weight change rate signal described above may be applied from this mechanism to the other cards. The outline is shown in Figure 6.

The raw material fibers are transported through a main duct 71 along with an air flow from a supply device 70 having a fiber opening mechanism such as a mixing batting machine, and branch feeders 72a, ? 2 b.

Distribute and supply to... Branch ducts 73a and 73b are connected to each branch feeder, and each card 1a and 1b is connected to each branch duct.

◆Reserve tanks 2a, 2b...2e facing φφIe, lf, 1g tatami/alj, respectively.

2f, 2g...2j, and the cards 1a to le connected to the branch duct 73a are grouped into A group and card 7
The cards 1f to 1j1tB are connected to the card 3b.

Sliver spot automatic control device 20a for each group;
20b has the aforementioned sliver thickness control mechanisms 21a to 21e, 21 for each card 1axle and If-1j, respectively.
f to 21j, and the aforementioned sliver weight control mechanism 30a, to any card of each group, for example, cards 1a and 1f.
30b, and the signals Wa and Wb from the respective comparison calculation mechanisms 35 (FIG. 1) are applied to the sliver thickness control mechanisms 21a to 21e and 21f to 21j of each card, respectively.

As a result, each of the cards 1b-1eS Ig to lj of each group regulates the feed amount of raw cotton in proportion to the sliver thickness, and also performs weight correction following the card 1allf representing the group.

In the figure, 10a, 10b, . . . indicate cans.

〔Effect of the invention〕

According to the present invention, the uneven thickness of the unreeled sliver is measured by a measuring roller, the feeding speed of the raw cotton by the feed roller is regulated, and the weight of the sliver at a predetermined length, that is, the gelatin value is measured, and the measuring roller Since the thickness unevenness measured by the roller is corrected, errors caused by the type of raw cotton and temperature/humidity can be eliminated, and it is possible to effectively remove sliver unevenness, especially large-scale unevenness. .

In this case, when a draft mechanism is provided behind the measuring roller to draft the sliver according to the unevenness of the sliver and supply it to the receiving gutter, the unevenness of the sliver in the receiving gutter is small, so even a relatively small amount of sliver weight can be measured. The average value has little variation, making it possible to make the receiving gutter smaller and shortening the period of correction based on the measured gel value.

In addition, when storing and feeding out the sliver to the receiving gutter, a nip roller is provided at the rear of the receiving gutter, and the speed at which the sliver is fed by this nip roller is slower than the speed at which the sliver is fed to the receiving gutter. When performing feeding by setting the speed higher than the speed, the accumulation and discharge of the sliver into the receiving gutter can be carried out repeatedly and continuously without interfering with the operation of the card and without the need to cut the sliver. be able to.

In this case, when the sliver stored in the receiving gutter is fed out at high speed and a detection means is provided to detect when the accumulated amount has reached zero, the rotation of the nip roller is switched to the low speed side by the accumulated amount zero signal from the means. As a result, the accumulation of sliver in the gutter can be automatically started again.

In addition, a detector is installed to detect the number of rotations of the nip roller drive shaft as a means of detecting the amount of sliver accumulated in the receiving gutter. It is easy to measure the value.

Furthermore, when a draft is applied to the sliver between the nip roller and the coiler roller, it is effective to prevent the sliver from stretching naturally after being stored in the can.

Furthermore, when the opened raw material fibers are supplied to a group of cards by air flow, the occurrence of sliver unevenness, especially catastrophe, tends to be the same for each card, so that for any one card, the sliver When a weight control mechanism is provided and a gel value fluctuation signal is added to the sliver thickness control mechanism provided on each card, the type of raw cotton on each card.

Fluctuations in gelatin values due to the influence of temperature and humidity are eliminated, and the configuration of each card can be simplified.

[Brief explanation of drawings]

1 to 6 show examples of the present invention, FIG. 1 is a schematic explanatory diagram of the present invention, FIG. 2 is a drive circuit diagram of a sliver weight control mechanism, and FIG. 3 is an explanation of sliver gelling fluctuations. In the figure, (a) shows the case where no draft is performed, (b) shows the case where the draft is carried out by the draft mechanism, Fig. 4 is an explanatory diagram of the effect of drafting the sliver by the nip roller, and Fig. 5
6 is a schematic explanatory diagram of a second embodiment of the present invention, and FIG. 7 is a schematic explanatory diagram of a conventional card sliver thickness back stitch movement control device. L Ia, 1b, Ic art@- is a card, 7 is a dotufa, 9 is a coiler roller, 2o, 20a + 20b is a sliver spot automatic control device, 21, 21 a, 2
l b, 21 c * ... is a sliver thickness control mechanism, 22 is a measuring roller, 30° 30a, 30
b is a sliver weight control mechanism, 31 is a receiving gutter, 33 is a draft mechanism, 34 is a weighing scale, 36 is a nip roller, 3rd is a rotation speed detector, and 60 is a zero detection means. O 1゛ car V 7°I''-y77 31: Melancholy 33: I-' Raft Name Hanging Ibuki 34:, f-ti 36 Shibu Arora 609 Reiji Fig. 2 Fig. 5 Fig. 4 O Fig. 6 Figure 7

Claims (7)

[Claims] (1) A sliver thickness control mechanism that includes a measuring roller that measures the sliver thickness behind the card doffer and regulates the amount of laps to be supplied based on the sliver thickness variation detection signal of the measuring roller; The sliver weight control mechanism includes a sliver weight control mechanism that measures the unit length weight of the sliver being fed out, and the sliver weight control mechanism includes a receiving gutter that receives the fed sliver and a weighing scale that measures the weight of the sliver stored in the receiving gutter. An automatic card sliver unevenness control device, characterized in that a measured value by a weighing scale is compared with a standard value, and the ratio thereof is added to the sliver thickness variation detection signal. (2) The sliver weight control mechanism has a draft mechanism placed between the measuring roller and the receiving gutter, and the draft amount is controlled by the sliver thickness variation detection signal from the measuring roller, which is added with the weight variation detection signal from the weighing scale. 2. The automatic card sliver unevenness control device according to claim 1, wherein (3) The sliver weight control mechanism includes a nip roller between the receiving gutter and the coiler roller of the sliver can, and includes a two-stage transmission means for changing the sliver feeding speed by the nip roller to a lower speed and a higher speed than the sliver feeding speed to the receiving gutter, 2. The automatic card sliver unevenness control device according to claim 1, wherein the sliver is accumulated in the receiving gutter by low-speed rotation and the accumulated sliver is fed out by high-speed rotation. (4) The card sliver according to claim 3, wherein the receiving gutter is provided with a zero detection means for detecting when the feeding of the stored sliver is completed, and when the feeding is completed, the rotation of the nip roller is switched to a low speed side. Spot automatic control device. (5) It is characterized by being equipped with a rotation speed detector of the drive shaft of the draft roller for detecting the amount of sliver accumulated in the receiving gutter, and detecting the weight by the weighing scale based on the signal from the detector that reaches a predetermined rotation speed. The automatic card sliver spot control device according to claim 3. (6) The card sliver unevenness automatic control device according to claim 3, wherein the coiler roller is driven in conjunction with the nip roller, and the coiler roller is driven at a higher speed than the nip roller to apply a draft to the sliver. (7) A measuring roller for measuring the sliver thickness is arranged behind the doffer for each of the group of cards to which the spread raw cotton is distributed and supplied by air flow, and the sliver thickness fluctuation detection signal of the measuring roller is used to supply the card. It is equipped with a sliver thickness control mechanism that regulates the amount of wrap, and any one card is equipped with a sliver weight control mechanism that measures the unit length weight of the sliver that is fed out from the measuring roller. The present invention is characterized by comprising a receiving gutter for receiving the sliver and a weighing scale for measuring the weight of the sliver in the receiving gutter, and applying a sliver weight fluctuation signal from the sliver weight control mechanism to the sliver thickness control mechanism of each card. Card sliver spot automatic control device.