JPS6014124B2 - Draft ratio control device that eliminates longitudinal weight fluctuations of the wrap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a draft ratio control device for eliminating weight fluctuations in the longitudinal direction of wraps formed in a wrap former machine.

In wrap former machines, such as sliver wrap machines and ribbon wrap machines, which are comb preparation machines in cotton combing machines, longitudinal weight variations are found in the formed wraps.

This is a phenomenon caused by irregular drafts that occur when a wrap with a low binding force between fibers is rolled up by a pair of streak rollers and wound up. In other words, when the diameter of the wrap is small, the wrap undergoes irregular drafting due to the influence of the crease roller, resulting in a thinner wrap.On the other hand, as the diameter of the wrap increases, the influence of the crease roller becomes weaker and irregular draft occurs. ), and as a result, the wrap does not become thinner. The tendency for the thickness of the wrap to change due to this irregular draft differs between individual wrap forming machines even when the same raw material is wrap formed under the same conditions.
This is a characteristic of the so-called wrap forming mechanism, that is, a weight fluctuation due to the habits of the machine. As mentioned above, when a wrap with weight variation in the longitudinal direction is processed by a combing machine, the weight variation of the wrap fed to the sliver of the combing machine naturally occurs, and the combing process and subsequent processes are Even if there is some compensation by the doubling operation in the above, the final result is that the fluctuation in the weight of the wrap reduces the uniformity of the yarn. It is an object of the present invention to solve the above-mentioned drawbacks of conventional wrap former machines and to form a wrap in which weight fluctuations in the longitudinal direction are eliminated using respective wrap former machines.

An object of the present invention is to provide a storage device for storing the characteristics of a wrap forming mechanism in a wrap former machine and a draft ratio set to cancel the head value of longitudinal weight fluctuations caused by changes in the outer diameter of the wrap when winding the wrap. a storage device operating mechanism that outputs a signal for operating the storage device; and a draft ratio changing mechanism that operates based on the signal from the storage device; The rotation is transmitted to the delivery roller side of the main draft part of the roller drafting means of the lap former machine, and the sheet is wound around the winding means to form a lap with the head value of longitudinal weight fluctuation canceled. This is achieved by a draft ratio control device which eliminates the longitudinal weight fluctuations of the wrap.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows the weight per unit length of the wrap formed in a sliver wrap machine, measured as the vertical axis, and the horizontal axis as the weight per unit length of the wrap, which is divided into equal parts in the longitudinal direction of the wrap. It is a drawing showing the weight fluctuation of.

In this case, the weight per unit length of the wrap is measured, for example, as follows. That is, the wrap formed by the sliver wrap machine is rewound and expanded, the 5 yards at the beginning of the wrap are removed, 2 yards are cut and weighed to calculate the weight per yard. Thereafter, for example, 2 yards are cut every 30 yards to calculate the weight per yard, and 10 numerical values are obtained over the entire length of the wrap. In FIG. 1, a chain line drawn parallel to the horizontal axis indicates a target weight per unit length of the wrap. As is clear from FIG. 1, the weight per unit length of the wrap is lighter than the target value at the beginning of wrapping (the left end in FIG. 1), and then the weight is gradually increased to exceed the target value. Then, as the end of the roll approaches, there is a backward direction in which the weight decreases again. FIG. 2 is a drawing showing the draft ratio of the roller draft means of a lap former machine in which the draft ratio control device according to the present invention is used, and the vertical axis shows the draft ratio and the horizontal axis shows the longitudinal direction of the wrap.

In FIG. 2, a dashed line drawn parallel to the horizontal axis indicates a draft ratio that is adopted when the weight per unit length of the wrap is a target value, that is, a reference draft ratio. As is clear from Fig. 2, the draft ratio applied when each area of the wrap, which is divided into one finger evenly after being wound into a wrap, is drafted before becoming a wrap, changes in a stepwise manner. ing. In this case, the stepwise change in draft ratio is determined in accordance with the weight variation per unit length of the wrap shown in FIG. In other words, since the wrap area indicated by 1 in Fig. 1 is intended to be formed to be lighter than the target value of weight per unit length, the draft when area 1 is formed by drafting with a sliver wrap machine is The ratio is set to be smaller than the target value of the draft ratio. On the other hand, since the wrap area indicated by 8 has a neck direction that is formed heavier than the target weight value, the draft ratio when drafted by the sliver wrap machine to form area 8 is the target value of the draft ratio. is set to the larger one. Then, the draft ratio for each area is set so that each area has the target weight per unit length after drafting. Since the ribbon wrap machine uses the same type of wrap winding mechanism as the sliver wrap machine, the formed wrap exhibits the same weight fluctuation per unit as in FIG.

Therefore, as in FIG. 2, for each area of the wrap.
- The draft ratio of the draft means is set. As a result of drafting with the draft ratio of the drafting means set for each zone as described above, the weight of each zone of the wrap formed by the sliver wrap machine and the ribbon wrap machine is the target weight per unit length. It is possible to obtain a wrap with no longitudinal weight fluctuations.

Next, a description will be given of an embodiment in which a device for removing weight fluctuations in the longitudinal direction of the wrap according to the present invention is installed in a ribbon wrap machine.

As shown in FIG. 4, the ribbon wrapping machine is comprised of a wrap supply means 25, a roller draft means 26, a lap dubbing means 31, and a wrap winding means 32.

The plurality of wraps listed on the wrap supply means 25 are each drafted, doubled in a layered manner, and then wound to form a wrap. Each mechanism of the ribbon wrap machine is driven by a main motor 33 via a respective mechanical linkage. The draft ratio control device according to the present invention has a storage device operating mechanism 35 as shown in FIG.
, a storage device 36, and a draft ratio changing mechanism 37, and the varying rotation given by the draft ratio changing mechanism controls the main draft portion of the roller draft means of a wrap former machine (a ribbon wrap machine in the embodiment shown in FIG. 4). It is connected to the roller draft means so that the signal is transmitted to the delivery roller side.

FIG. 3 shows a block diagram of the draft ratio control device of the present invention.

The storage device actuating mechanism 35 is a device that instructs the storage device 36 about the timing of changing the draft ratio of the pan, which is performed while one wrap is being wound by the wrap winding means 32.

That is, the storage device operating mechanism 35 is composed of a pulse generator and a counter. The pulse generator is a lap progress long neck 9
This device indirectly increases the length of the formed wrap by generating pulses in proportion to the number of rotations of the main motor. The counter is a storage device activation means that counts the pulses from the pulse generator, and the counted value of the pulses from the pulse generator reaches a designated position at each predetermined interval of the lap, which is stored as the corresponding counted value. A signal is output to the storage device each time. In this embodiment, the specified position at each predetermined interval of the wrap is the overnight position, and 5 yards (about 4.5 skins) of the beginning and end of the wrap of the total length of 350 yards (approximately 320 m) are removed. , the remaining middle portion is divided into one beat to create one solid area, and the front end position of each of the areas is determined as a designated position. Storage device 3
Reference numeral 6 denotes a character generator, and the outer shell of the character generator is provided with a storage element with a one-section lid, and each of the storage elements stores a predetermined draft ratio addition value to the reference draft ratio of the draft means at the specified position. are recorded accordingly. In other words, the values are set so as to cancel out the tendency value of the weight fluctuation in the longitudinal direction of the wrap caused by the standard draft D shown in FIG. 2 and the characteristics of the wrap forming mechanism and changes in the outer diameter of the wrap at each designated position. The difference di-D between the draft ratio di and the draft ratio di is recorded in each storage element as an additional draft ratio value. When the character generator receives a signal from the storage device operating mechanism, it reads a predetermined draft ratio addition value from the storage element at a specified position corresponding to the signal, and adds a predetermined draft ratio addition value at a specified position one position before the specified position. A reading calculation device is provided that calculates the difference between the voltage value and the voltage value and outputs the difference as a voltage value. The draft ratio changing mechanism 37 includes a motor control section 38, control motor mechanisms 39 and 40, and a differential gear 42 (FIG. 5).

The motor control section 38 is a mechanism that amplifies the voltage value from the character generator and transmits it to the control motor mechanisms 39, 40'. The control motor mechanism consists of a control motor 39 and a mechanical connection means such as a reducer 40, and the control motor 39 generates a rotational force at a rotation speed corresponding to the voltage amplified by the motor control unit 38, and the mechanical connection The means is a mechanism that transmits the rotational force to the insert gear 42. In addition to the rotational force from the control motor 39, the differential gear 42 receives a rotational force set to provide the draft means 26 with a reference draft ratio. That is, as is clear from FIGS. 3, 4, and 5, an input shaft 41 is connected to one end of the insert gear 42, and the rotational force from the main motor 33 is connected to the input shaft 41 through a plurality of mechanical connections. The rotation speed is converted into a rotation speed corresponding to the standard draft ratio of the draft part through a mechanism. An output shaft 43 is further connected to the differential gear 42, and the rotational speed of the output shaft 43 is a combination of the rotational speed of the rotational force from the control motor 39 and the rotational speed of the rotational force from the main motor 33. be. The roller drafting means 26 of the ribbon wrapping machine consists of a front roller 27, two middle rollers 28, 29, and a back roller 30. The front roller 27 is directly driven by a main motor 33 through a mechanical coupling mechanism. Figure 4).

The two middle rollers 28 and 29 are driven by a back roller 30 via a gear mechanism.

The output shaft 43 of the differential gear 42 of the draft changing mechanism 37 is connected to the three back rollers via a power transmission means 44. In this embodiment, the storage device 36 of the device for removing weight fluctuations in the longitudinal direction of the wrap of the present invention is such that a predetermined draft ratio addition value to the reference draft ratio of the drafting means corresponds to a designated position for each of the plurality of elements of the character generator. It is configured to be recorded as follows.

However, a function generator is additionally attached to the storage device, and the storage element stores the trend value of the longitudinal weight fluctuation of the wrap caused by the characteristics of each wrap forming mechanism and the change in the outer diameter of the wrap. The function generator calculates a draft ratio additional value to the reference draft ratio by converting it into memory corresponding to a specified position at each predetermined interval in the direction and canceling the trend value of the weight fluctuation in the longitudinal direction of the wrap inputted from the storage element. and the draft ratio additional value can be configured to be output in correspondence with the designated position. Next, the operation of the device for eliminating longitudinal weight fluctuations of the wrap according to the present invention will be explained.

First, the characteristics of the wrap forming mechanism in a target wrap forming machine, such as a sliver wrap machine or a ribbon wrap machine, and the deflection value of longitudinal weight fluctuations that occur due to changes in the outer diameter of the wrap during wrap winding are determined.

For this purpose, the storage device of the device of the invention, which is attached to the wrap former machine, is adjusted to the zero point. That is, the draft additional value is set to 0 at all specified positions. Thereafter, a wrap is formed using predetermined raw materials and under predetermined spinning conditions. The formed wrap is rewound and expanded, and the beginning and end of the 350-yard (approximately 320) length of the wrap are removed by 5 yards (approximately 4.5 yards) each, and the middle portion is divided into 1 bamboo leaves. A small area of Kawago's lap is obtained. Two specimens of 1 yard each are cut in the longitudinal center area of a small section of this IN-hard wrap. Each sample is evaluated and the average value is calculated to determine the weight per unit length. In this way, the tendency value of longitudinal weight fluctuation of the target lap homer machine is obtained as shown in FIG. Furthermore, in order to obtain a more accurate trend value, it is preferable to measure the weight per unit length of the textbook wrap using the method described above, and calculate the average value to obtain the trend value. Note that the removal of the 5 yards at the beginning and end of the winding may be done by removing only one side. Based on the trend value, as shown in FIG. 2, the draft ratio additional value di-D at the designated position of the IM fixation is calculated.

Next, the draft ratio additional value dj-D is recorded in correspondence with the designated position in one fixed memory element of the character generator, which is the memory device of the apparatus of the present invention.

Next, the counter of the recording device operating mechanism is adjusted. That is, the counter is adjusted so as to output a signal to the storage device each time the length of the lap being formed exceeds the length of the designated position of 1M. Preparation before operation of the apparatus of the present invention is completed by storing the information in the storage device and adjusting the counter as described above. The spinning operation of a lap former machine equipped with the device of the invention is carried out no differently from the operation of a conventional lap former machine. The draft ratio additional value recorded in the storage device 36 is read at each designated position of 1q, and the difference from the previous draft ratio additional value is transmitted to the differential gear 42 to control the rotational speed of the back roller 30. change. When the additional draft ratio value is negative as at position 2 on the machine shaft in FIG. 2, the differential gear 42 operates so that the rotational speed of the back roller 30 becomes faster, and the total draft ratio of the roller draft means becomes smaller. On the other hand, when the draft ratio addition value is positive as in the position 8 on the machine axis in Fig. 2, the rotational speed of the back roller 30 is slowed down by the rotary gear 42, thereby increasing the total draft of the drafting means. . Note that in this embodiment, the first second roller 28
Since the rotations of the three back loafs are interlocked, the draft ratio additional value is changed for each specified position between the front roller 27 and the first second roller 28, which are the main draft portions. All of the above draft ratio changes are automatically performed by the apparatus of the present invention. A wrap is then formed in which longitudinal weight fluctuations are eliminated. The draft ratio control device of the present invention measures the characteristics of the lap forming mechanism in each lap forming machine and the trend value of longitudinal weight fluctuations caused by changes in the outer diameter of the wrap during wrap winding, and measures the tendency of weight fluctuations in the longitudinal direction. Since the draft ratio set to cancel the trend value is sequentially added to the standard draft ratio of the roller draft means of the wrap former machine as the wrap formation progresses, a wrap with longitudinal weight fluctuations eliminated can be obtained.

As a result, the degree of uniformity of the combed yarn spun using the wrap formed using the wrap former machine equipped with the device of the present invention is improved. The addition of the draft ratio set to cancel the weight fluctuation tendency value to the reference draft ratio of the roller draft means is performed to the main draft portion of the roller draft means as described above, so this portion is The fleece is uniformly drafted at a predetermined draft ratio that changes each time under the control of the front roller and the second roller. In other words, there is no risk of irregular drafting in this part. Further, the draft control device of the present invention provides operating conditions for the draft ratio control device of the present invention, such as an operation of measuring a trend value of longitudinal weight fluctuation of the wrap, an operation of recording the draft ratio additional value in a recording device, and an operation of adjusting a counter. Everything except the settings will be processed automatically.

Therefore, the operation of the wrap former machine equipped with the device of the present invention does not require any special operation, that is, it does not place any special burden on the worker.The longitudinal weight change can be achieved by simply operating the wrap former machine in the same way as a normal wrap former machine. It is possible to form a wrap that removes. Furthermore, since the draft ratio control device of the present invention has a simple structure, it can be manufactured at low cost, and it can be installed not only on a new stand but also on an existing stand by modifying it.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the weight variation per unit length of a wrap formed in a sliver wrap machine. FIG. 2 is a diagram showing the draft ratio set for each designated position in the apparatus of the present invention. FIG. 3 is a block diagram illustrating an embodiment of the apparatus of the present invention. FIG. 4 is a schematic perspective view of a bone wrap machine equipped with an apparatus according to an embodiment of the present invention. FIG. 5 is a front view illustrating a draft ratio changing mechanism used in the apparatus according to the embodiment of the present invention. 21... Weight curve per unit length of wrap for the total length of the wrap, 22... Draft ratio set for each specified position of the total length of the wrap, 25... Wrap supply device, 26... ...Draft means, 27...
centre. controller, 28...first second roller, 29...second second roller, 30...back roller, 31...
- Lap doubling means, 32... Wrap winding means, 33... Main motor, 35... Storage device operating mechanism, 36... Storage device, 37.・
... Draft ratio changing mechanism, 38 ... Motor control section, 39 ... Control motor, 40 ... Speed reducer, 41 ... Gives reference draft ratio Rotational force input shaft, 42...Differential gear, 43...
...Output shaft after being adjusted with differential gear, 44...
...Power transmission means. Figure 1 Figure 2 Figure 5 Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1. Eliminate the longitudinal weight fluctuation of the lap in a lap former machine comprising a sliver or lap doubling means, a roller drafting means for the sliver or lap consisting of a plurality of rollers, and a wrap winding means. A draft ratio control device, the draft ratio control device comprising:
A storage device for storing the characteristics of the wrapforming mechanism in the wrapformer machine and a draft ratio set to cancel the tendency value of longitudinal weight fluctuations caused by changes in the outer diameter of the wrap when winding the wrap; The device includes a storage device operating mechanism that outputs a signal for operating the device, and a draft ratio changing mechanism that operates based on the signal from the storage device, and the fluctuating rotation given by the draft ratio changing mechanism is applied to the roller. The longitudinal weight of the wrap is transmitted to the delivery roller side of the main draft portion of the drafting means, and the wrap is wound around the winding means in a state where the tendency value of longitudinal weight fluctuation is canceled to form the wrap. Draft ratio controller to eliminate fluctuations. 2. The storage device includes a plurality of storage elements and a function generator, each storage element storing the tendency value of the weight fluctuation in the longitudinal direction of the lap in correspondence with a specified position at each predetermined interval in the longitudinal direction of the lap; The function generator is configured to convert the tendency value of the longitudinal weight variation of the lap outputted from each storage element so as to cancel it and output it as a draft ratio additional value with respect to the reference draft ratio. An apparatus according to claim 1. 3. A plurality of storage devices, wherein the storage device stores draft ratio additional values for a standard draft ratio set to cancel the tendency value of longitudinal weight fluctuation of the wrap, corresponding to specified positions at predetermined intervals in the longitudinal direction of the wrap. 2. The apparatus according to claim 1, further comprising a plurality of storage elements, wherein the draft ratio additional value is output from the plurality of storage elements. 4. The storage device is a character generator, and the character generator stores a predetermined draft ratio addition value to a reference draft ratio of the drafting means in correspondence with a designated position at each predetermined interval in the longitudinal direction of the wrap. A patent claim in which the output corresponds to the difference between a predetermined draft ratio additional value at a designated position and a predetermined draft ratio additional value at the immediately preceding designated position as a voltage value by a signal from a storage device operating mechanism. The device according to item 3 within the range of 5. The number of the specified positions at each predetermined interval in the longitudinal direction of the wrap is 6 to 30, and the specified positions remove a certain length from the start and end of the wrap, respectively, with respect to the entire length of the wrap,
The remaining intermediate portion is divided into 6 to 30 equal parts to create 6 to 30 areas, and any one of claims 1 to 4 is defined at the front end position of each of the areas. The device described. 6 The number of the designated positions at each predetermined interval in the longitudinal direction of the wrap is 6 to 30, and the designated positions are such that a certain length is removed from either the end of the wrap from the start or the end of the wrap. , the remaining portion is divided into 6 to 30 equal parts to create 6 to 30 areas, and any one of claims 1 to 4 is defined at the front end position of each of the areas. The device described. 7. The device according to claim 5 or 6, wherein the number of designated positions is ten. 8. The mechanism for operating the storage device comprises lap progress length measuring means and storage device activating means, and the lap progress length measuring means detects the progress length of the formed lap or a value proportional to the progress length. The storage device activating means compares the progression length of the lap detected by the lap progression length measuring means with the predetermined interval of the lap, and the lap to be formed is determined at the predetermined intervals provided at each of the predetermined intervals. 2. The device according to claim 1, wherein the device is means for outputting a signal to a storage device each time the device passes a location. 9. The lap progression length measuring means is a pulse generator that generates pulses in proportion to the number of rotations of the main motor, and the storage device activation means counts the pulses from the pulse generator and measures the pulses at the predetermined position. Claim 8, wherein the counter outputs a signal each time a count value of pulses from the pulse generator reaches the predetermined interval of laps stored as a corresponding count value. equipment. 10. The device according to claim 1, wherein said draft ratio changing mechanism comprises draft ratio changing means and operation transmitting means for transmitting a signal from a storage device to the draft ratio changing means as a mechanical operation. 11 The operation transmission means includes a motor control section that amplifies the output voltage from the storage device and a control motor that is operated by the amplified voltage, and the draft ratio changing means includes a differential gear and an output shaft of the differential gear. and a power transmission means that connects the output roller of the main draft portion of the drafting means, and the differential gear receives a rotational force corresponding to the reference draft ratio from the main motor via a mechanical coupling mechanism and a rotational force from the control motor. 11. The apparatus according to claim 10, wherein a rotational force is inputted, and rotation having a rotational speed that is a combination of the rotational speeds of the two rotational forces is outputted to the power transmission means. 12. The apparatus according to claim 11, wherein the output shaft of the differential gear is connected to a back roller of the drafting means via the power transmission means.