JP2018076607A - Spinning machine and spinning method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spinning machine and a spinning method capable of stably supplying additives.SOLUTION: A spinning machine 1 comprises plural spinning units 2, air pipes 62 to which plural feed pipes 63 for feeding air to the respective air spinning devices 7 of the plural spinning units 2 are connected at upstream sides and through which air flows, a feeding device 70 for feeding additives to the air pipes 62, and a control device 100 for controlling the action of the feeding device 70, wherein the control device 100 controls the feeding device 70 so that the additives are fed by intermittent control when an operation number of the air spinning devices 7 is less than a predetermined number, changes a duty ratio in the intermittent control according to the operation number, increases or decreases the supply amounts of the additives according to the operation number, controls the feeding device 70 so that the additives are continuously fed when the operation number is a predetermined number or more, and allows the fixed amounts of the additives to be fed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a spinning machine and a spinning method.

  As a conventional spinning machine, for example, the one disclosed in Patent Document 1 is known. The spinning machine described in Patent Document 1 includes a plurality of spinning units including an air spinning device that twists a fiber bundle using air, a pneumatic feeding device that pumps air, and an air that guides the air pumped by the pneumatic feeding device. Piping, an additive supply device for supplying the additive to the air piping on the upstream side where the air flowing through the air piping is branched toward the air spinning device, and a control device for adjusting the supply amount of the additive by the additive supply device And.

JP 2012-97391 A

  In the spinning machine as described above, when an instruction to start the spinning operation of the spinning unit is input, the spinning operation is started sequentially from the spinning unit for which preparation (yarn joining operation by the yarn joining cart, etc.) has been completed. Therefore, in the spinning machine, it takes time until the spinning operation is started in all the spinning units scheduled to operate. The additive supply device supplies an amount of additive set according to the number of spinning units (pneumatic spinning devices) to be operated. Therefore, in the conventional spinning machine, when the number of spinning units that have started spinning operation is small at the beginning of spinning operation, the additive is excessive with respect to the air spinning device of the spinning unit that started spinning operation at an early stage. May be supplied. If the additive is excessively supplied to the fiber bundle, the yarn quality may change due to, for example, a change in the twist state.

  An object of one aspect of the present invention is to provide a spinning machine and a spinning method capable of stably supplying an additive.

  A spinning machine according to one aspect of the present invention includes an air spinning device that generates yarn by a spinning operation that twists a fiber bundle by air, and a winding device that winds the yarn around a bobbin to form a package. A plurality of spinning units, an air pipe through which air is circulated, connected to the upstream side of a plurality of supply pipes that supply air to each of the pneumatic spinning devices of the plurality of spinning units, and a supply apparatus that supplies additives to the air pipes A control device that controls the operation of the supply device, and the control device controls the supply device so that the additive is supplied intermittently when the number of operating pneumatic spinning devices is less than a predetermined number. In addition, the duty ratio in the intermittent control is changed according to the number of operating units, and the amount of additive supply is increased / decreased according to the number of operating units. It controls the supply device to supply, to supply a predetermined amount of the additive.

  In the spinning machine according to one aspect of the present invention, the control device changes the duty ratio in the intermittent control according to the number of operating units according to the number of operating units when the number of operating pneumatic spinning devices is less than a predetermined number. When the supply amount of the additive is increased or decreased and the number of operating units is a predetermined number or more, a certain amount of additive is supplied. Accordingly, in the spinning machine, the amount of additive corresponding to the number of operating air spinning apparatuses that are actually operated (spun) is supplied to the air, so that the supply amount of the additive can be made uniform. Therefore, in the spinning machine, excessive supply of the additive to the air spinning device of the spinning unit is suppressed. As a result, the spinning machine can stably supply the additive.

  In one embodiment, when the number of operating units is less than a predetermined number, the control device may linearly increase or decrease the supply amount of the additive according to the number of operating units. Thus, intermittent control can be facilitated by increasing or decreasing the supply amount linearly.

  In one embodiment, the supply device may supply the additive to the air line by applying a constant pressure to the additive. This eliminates the need for pressure control (adjustment), thereby simplifying the configuration and control.

  In one embodiment, the control device may control the supply device immediately before the machine base is stopped or immediately before the lot change when an instruction to start the spinning operation is input after the machine stand rises or after the lot change. After the start-up of the spinning machine or after changing the lot, the spinning operations of the plurality of spinning units are started sequentially. Further, immediately before the machine base is stopped or immediately before the lot change, the operations of the plurality of spinning units are sequentially stopped. Therefore, in order to suppress fluctuations in the supply amount of the additive-containing air, it is particularly effective to control the supply amount according to the number of operating units.

  In one embodiment, when the number of operating units is less than a predetermined number, the control device has a relationship of (period of supplying additive / intermittent cycle period) = (number of operating units / number of scheduled pneumatic spinning units to operate). If the number of operating units is equal to or greater than the predetermined number, add based on the planned number of operating pneumatic spinning devices and the optimal amount of additive for one pneumatic spinning device. The supply amount of the agent may be set. Thus, by setting the supply amount of the additive, the supply amount of the additive can be made uniform.

  In one embodiment, there may be one air pipe. In this configuration, since it is only necessary to control the supply amount of the additive supplied to one air pipe, the supply amount can be controlled accurately and easily.

  In one embodiment, the air pipe may extend along the arrangement direction of the plurality of spinning units. In this configuration, the length of each supply pipe connecting the air pipe and the plurality of pneumatic spinning devices can be made constant. Accordingly, the supply amount of the additive can be made more uniform.

  In one embodiment, the control device may acquire the number of operating units based on a yarn traveling signal output from each spinning unit. Thereby, the operating number of pneumatic spinning devices can be acquired accurately.

  In one embodiment, a flow measurement device that measures the flow rate of air flowing through the air pipe may be provided, and the control device may acquire the number of operating units based on the measurement result of the flow measurement device. When the number of operating units is small, the flow rate through the air piping decreases, and when the number of operating units is large, the flow rate through the air piping increases. Therefore, the number of operating units can be accurately acquired from the measurement result of the flow rate measuring device.

  In one embodiment, the air containing the additive may be supplied only to the operating air spinning device. In this configuration, the air containing the additive is not supplied to the pneumatic spinning device that is not operating, and therefore, the supply amount according to the number of operating units can be controlled with high accuracy.

  A spinning method according to an aspect of the present invention includes an air spinning device that generates yarn by a spinning operation that twists a fiber bundle by air, and a winding device that winds the yarn around a bobbin to form a package. A plurality of spinning units, an air pipe through which air is circulated, connected to the upstream side of a plurality of supply pipes that supply air to each of the pneumatic spinning devices of the plurality of spinning units, and a supply apparatus that supplies additives to the air pipes A spinning method implemented in a spinning machine comprising a pneumatic spinning device, wherein when the number of operating pneumatic spinning devices is less than a predetermined number, the supply device is controlled so that the additive is supplied intermittently and intermittently The duty ratio in the control is changed according to the number of operating units, and the amount of additive supplied is increased or decreased according to the number of operating units. It controls the supply device as to supply a predetermined amount of the additive.

  In the spinning method according to one aspect of the present invention, when the operating number of pneumatic spinning devices is less than a predetermined number, the duty ratio in the intermittent control is changed according to the operating number, and the additive is supplied according to the operating number. When the amount is increased or decreased and the number of operating units is a predetermined number or more, a certain amount of additive is supplied. As a result, the amount of additive that corresponds to the number of operating air spinning apparatuses that are actually operated (spun) is supplied to the air, so that the supply amount of the additive can be made uniform. Therefore, excessive supply of the additive to the air spinning device of the spinning unit is suppressed. As a result, the additive can be stably supplied.

  According to the present invention, the additive can be stably supplied.

FIG. 1 is a front view showing a spinning machine according to an embodiment. FIG. 2 is a side view of the spinning unit of the spinning machine of FIG. FIG. 3 is a diagram showing a configuration of an air distribution device and an additive supply device of a spinning machine. FIG. 4A is a diagram showing the relationship between the number of units and the total supply amount, and FIG. 4B is a diagram showing the number of units and the supply amount per unit. FIG. 5A is a diagram showing the relationship between the number of units and the total supply amount, and FIG. 5B is a diagram showing the number of units and the supply amount per unit.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or equivalent elements will be denoted by the same reference numerals, and redundant description will be omitted.

  As shown in FIG. 1, the spinning machine 1 includes a plurality of spinning units 2, a yarn splicing cart 3, a doffing cart (not shown), a first end frame 4, and a second end frame 5. I have. The plurality of spinning units 2 are arranged in a line. Each spinning unit 2 generates the yarn Y and winds it on the package P. When the yarn Y is cut by a certain spinning unit 2 or the yarn Y is cut for some reason, the yarn joining cart 3 performs a yarn joining operation on the spinning unit 2. The doffing cart doffs the package P and supplies the new bobbin B to the spinning unit 2 when the package P becomes full in a certain spinning unit 2. The first end frame 4 accommodates a collection device for collecting fiber waste and yarn waste generated in the spinning unit 2.

  The second end frame 5 adjusts the air pressure of the compressed air (air) supplied to each part of the spinning machine 1 to supply air to each part, and supplies power to each part of the spinning unit 2. A drive motor or the like is stored. The second end frame 5 is provided with a machine control device 100, a display screen 102, and input keys 104. The machine control device 100 centrally manages and controls each part of the spinning machine 1. The display screen 102 can display information related to the setting contents and / or status of the spinning unit 2. When the operator performs an appropriate operation using the input keys 104, the setting operation of the spinning unit 2 can be performed.

  As shown in FIGS. 1 and 2, each spinning unit 2 includes a draft device 6, an air spinning device 7, a yarn monitoring device 8, a tension sensor 9, in order from the upstream side in the traveling direction of the yarn Y. A yarn storage device 11, a waxing device 12, and a winding device 13 are provided. The unit controller 10 is provided for each predetermined number of spinning units 2 and controls the operation of the spinning units 2.

  The draft device 6 drafts a sliver (fiber bundle) S. The draft device 6 includes a back roller pair 14, a third roller pair 15, a middle roller pair 16, and a front roller pair 17 in order from the upstream side in the traveling direction of the sliver S. Each roller pair 14, 15, 16 and 17 has a bottom roller and a top roller. The bottom roller is rotationally driven by a drive motor provided in the second end frame 5 or a drive motor provided in each spinning unit 2. An apron belt 16 a is provided for the top roller of the middle roller pair 16. An apron belt 16 b is provided for the bottom roller of the middle roller pair 16.

  The air spinning device 7 generates a yarn Y by twisting the fiber bundle F drafted by the draft device 6 by a swirling air flow. More specifically (however, illustration is omitted), the pneumatic spinning device 7 includes a spinning chamber, a fiber guide portion, a swirling air flow generation nozzle, and a hollow guide shaft body. The fiber guide unit guides the fiber bundle F supplied from the upstream draft device 6 into the spinning chamber. The swirling airflow generation nozzle is disposed around the path along which the fiber bundle F travels. When air is injected from the swirling air flow generating nozzle, a swirling air flow is generated in the spinning chamber. By this swirling air flow, the fiber ends of the plurality of fibers constituting the fiber bundle F are reversed and swirled. The hollow guide shaft body guides the yarn Y from the spinning chamber to the outside of the pneumatic spinning device 7.

  The yarn monitoring device 8 monitors information on the traveling yarn Y between the pneumatic spinning device 7 and the yarn storage device 11, and detects the presence or absence of a yarn defect based on the monitored information. When the yarn monitoring device 8 detects a yarn defect, the yarn monitoring device 8 transmits a yarn defect detection signal to the unit controller 10. The yarn monitoring device 8 detects, for example, an abnormal thickness of the yarn Y and / or a foreign matter contained in the yarn Y as the yarn defect. When the yarn Y is detected, the yarn monitoring device 8 outputs a yarn traveling signal indicating that the yarn Y is traveling between the pneumatic spinning device 7 and the yarn storage device 11. The yarn monitoring device 8 also detects yarn breakage and the like.

  The tension sensor 9 measures the tension of the traveling yarn Y between the pneumatic spinning device 7 and the yarn storage device 11, and transmits a tension measurement signal to the unit controller 10. When the unit controller 10 determines that there is an abnormality based on the detection result of the yarn monitoring device 8 and / or the tension sensor 9, the yarn Y is cut in the spinning unit 2. Specifically, the supply of air to the pneumatic spinning device 7 is stopped and the generation of the yarn Y is interrupted, whereby the yarn Y is cut. Alternatively, the yarn Y may be cut by a cutter provided separately.

  The waxing device 12 applies wax to the yarn Y between the yarn storage device 11 and the winding device 13.

  The yarn accumulating device 11 takes the slack of the yarn Y between the pneumatic spinning device 7 and the winding device 13. The yarn storage device 11 has a function of stably pulling out the yarn Y from the pneumatic spinning device 7, and retains the yarn Y sent out from the pneumatic spinning device 7 at the time of yarn joining operation by the yarn joining cart 3, etc. And a function of preventing the fluctuation in the tension of the yarn Y on the downstream side of the yarn accumulating device 11 from being transmitted to the pneumatic spinning device 7.

  The winding device 13 forms the package P by winding the yarn Y around the bobbin B. The winding device 13 includes a cradle arm 21, a winding drum 22, and a traverse guide 23. The cradle arm 21 supports the bobbin B so as to be rotatable. The cradle arm 21 is swingably supported by a support shaft 24 and brings the surface of the bobbin B or the surface of the package P into contact with the surface of the winding drum 22 with an appropriate pressure. A drive motor (not shown) provided on the second end frame 5 drives the winding drums 22 of the plurality of spinning units 2 all at once. Thereby, in each spinning unit 2, the bobbin B or the package P is rotated in the winding direction. The traverse guide 23 of each spinning unit 2 is provided on a shaft 25 shared by a plurality of spinning units 2. When the drive motor of the second end frame 5 reciprocates the shaft 25 in the direction of the rotation axis of the winding drum 22, the traverse guide 23 traverses the yarn Y with a predetermined width with respect to the rotating bobbin B or package P.

  When the yarn Y is cut in a certain spinning unit 2 or the yarn Y is cut for some reason, the yarn joining cart 3 travels to the spinning unit 2 and performs a yarn joining operation. The yarn joining cart 3 has a yarn joining device 26, a suction pipe 27, and a suction mouth 28. The suction pipe 27 is rotatably supported by the support shaft 31, captures the yarn Y from the pneumatic spinning device 7, and guides it to the yarn joining device 26. The suction mouse 28 is rotatably supported by the support shaft 32, captures the yarn Y from the winding device 13, and guides it to the yarn joining device 26. The yarn joining device 26 performs yarn joining between the guided yarns Y. The yarn joining device 26 is a splicer that uses compressed air, a piecer that uses seed yarn, or a knotter that mechanically joins the yarn Y.

  When the yarn joining cart 3 performs the yarn joining operation, the package P is rotated (reversely rotated) in the anti-winding direction. At this time, the cradle arm 21 is moved by an air cylinder (not shown) so that the package P is separated from the winding drum 22, and the package P is moved by a reverse rotation roller (not shown) provided on the yarn splicing carriage 3. It is rotated backward.

  As shown in FIG. 3, the spinning machine 1 further includes an air distribution device 60 and an additive supply device (supply device) 70. The air distribution device 60 includes a first air pipe (air pipe) 62, a first distribution pipe (supply pipe) 63, a second air pipe 64, and a second distribution pipe 65.

  In the factory where the spinning machine 1 is installed, a pneumatic feeding device 61 is provided. The pneumatic feeder 61 is, for example, an electric compressor that pressurizes and sends out air by driving an electric motor. The pressure of the air pumped by the pneumatic feeder 61 is adjusted by the regulator 61a.

  The first air pipe 62 guides mist air (additive-containing air). The mist air is air in which an additive is mixed in the air that is supplied by the pneumatic feeder 61 and supplied to the spinning machine 1 through the air supply pipe 67. The first air pipes 62 extend in parallel or substantially in parallel along the arrangement direction of the spinning units 2. The first air pipe 62 is located above the air spinning device 7.

  The first distribution pipe 63 guides the mist air flowing through the first air pipe 62 to each air spinning device 7. One end of the first distribution pipe 63 is connected to the pneumatic spinning device 7. Specifically, one end of the first distribution pipe 63 is connected to a shuttle valve (not shown) connected to the swirling air flow generating nozzle of the air spinning device 7. The other end of the first distribution pipe 63 (upstream side in the flow direction of mist air) is connected to a midway portion of the first air pipe 62. The flow rate of mist air guided to the pneumatic spinning device 7 by the first distribution pipe 63 is adjusted by an opening / closing valve 63 a provided in the first distribution pipe 63. The unit controller 10 controls the operation of the opening / closing valve 63a. In the pneumatic spinning device 7 supplied with mist air, a mist spinning operation (additive spinning operation) using mist air is performed.

  The second air pipe 64 guides dry air (air) that does not contain the additive pumped by the pneumatic feeder 61. The second air pipes 64 extend in parallel or substantially in parallel along the arrangement direction of the spinning units 2. The second air pipe 64 is positioned above the air spinning device 7. The second air pipe 64 may be provided so as to be positioned below the pneumatic spinning device 7 or may be provided at the same height as the pneumatic spinning device 7.

  The second distribution pipe 65 guides the dry air flowing through the second air pipe 64 to each air spinning device 7. One end of the second distribution pipe 65 is connected to the pneumatic spinning device 7. Specifically, one end of the second distribution pipe 65 is connected to the shuttle valve connected to the swirling air flow generating nozzle of the air spinning device 7. That is, the first distribution pipe 63 and the second distribution pipe 65 are connected to a common shuttle valve. The other end of the second distribution pipe 65 is connected to a midway part of the second air pipe 64. The flow rate of the dry air guided to the pneumatic spinning device 7 by the second distribution pipe 65 is adjusted by an open / close valve 65 a provided in the second distribution pipe 65. The unit controller 10 controls the operation of the opening / closing valve 65a. In the air spinning device 7 supplied with the dry air, a dry spinning operation using the dry air is performed.

  In the spinning machine 1, for example, when an operator operates the input key 104, it can be selected whether to perform a mist spinning operation or a dry spinning operation. Until one spinning unit 2 completes winding of one package P, the yarn Y generated by spinning the fiber bundle F by the selected mist spinning operation or dry spinning operation is wound.

  As shown in FIG. 3, the additive supply device 70 includes a branch pipe 71, a pressure adjustment device 72, an additive storage tank 73, an additive supply pipe 74, and a supply amount adjustment valve 75. ing.

  The branch pipe 71 branches the air flowing through the first air pipe 62 and guides it to the additive storage tank 73. One end of the branch pipe 71 is connected to the additive storage tank 73. The other end of the branch pipe 71 is connected to the middle part of the first air pipe 62.

  The pressure adjusting device 72 pressurizes the air guided to the additive storage tank 73 to adjust the internal pressure of the additive storage tank 73. The pressure adjusting device 72 is, for example, a pressure increasing valve that pressurizes air by driving a sliding piston. Alternatively, the pressure adjusting device 72 may be an electric compressor that pressurizes air by driving an electric motor. The pressure adjusting device 72 is connected to the machine base control device 100 via an electric line. The machine base control device 100 controls the pressure adjusting device 72 by transmitting a control signal to the pressure adjusting device 72.

  The additive storage tank 73 is a container for storing the additive. In the present embodiment, the additive is, for example, a lubricant. The additive is not limited to a lubricant, and various additives (drugs) and / or pneumatic spinning capable of imparting at least one of antibacterial, deodorant, deodorant, and unwinding (wax) functions to the yarn Y. An additive (medicine) that prevents or eliminates the accumulation of oil in the apparatus 7 can be used. The additive may be water. The additive storage tank 73 includes a storage amount detection unit 73a that detects the storage amount of the additive.

  The additive supply pipe 74 guides the additive stored in the additive storage tank 73 to the first air pipe 62. One end of the additive supply pipe 74 is connected to the additive storage tank 73. The other end of the additive supply pipe 74 is connected to the upstream side of the location where the air flowing through the first air pipe 62 is branched toward the respective air spinning devices 7.

  The supply amount adjustment valve 75 is provided in the branch pipe 71. The supply amount of the additive supplied (sprayed) to the first air pipe 62 by the additive supply pipe 74 is adjusted by a supply amount adjusting valve 75. The machine control device 100 controls the operation of the supply amount adjustment valve 75.

  The additive supply device 70 supplies the additive stored in the additive storage tank 73 to the first air pipe 62. The additive supply device 70 adjusts the supply amount of the additive by adjusting the pressure adjustment device 72. The additive supply device 70 is controlled by the machine base control device 100. For example, the machine control device 100 may control the additive supply device 70 according to the raw material of the sliver S to control the supply amount of the additive.

  The air distributor 60 uses only the first air pipe 62 by opening the valve 66 disposed upstream of the first air pipe 62 and closing the valve 69 disposed upstream of the second air pipe 64. Then, mist air is supplied to the air spinning device 7. The air distributor 60 closes the valve 66 and opens the valve 69 to supply dry air to the air spinning device 7 using only the second air pipe 64. In addition, if it is the structure which can switch supply of each air, the position and / or number which provide each valve | bulb are not limited to embodiment of illustration.

  The sliver S spun in the spinning machine 1 may include at least one of natural fiber, regenerated fiber, semi-synthetic fiber, and synthetic fiber (for example, polyester fiber, polyamide fiber, polyacrylonitrile fiber). Natural fibers are, for example, seed hair fibers or bast fibers, and specifically cotton, flax and the like. The regenerated fiber is, for example, regenerated cellulose, and specifically, rayon, special rayon (polynosic, HWM rayon), cupra and the like. The semi-synthetic fiber is, for example, a cellulosic fiber, specifically, acetate, triacetate or the like. Specific examples of the synthetic fiber include polyester, nylon, acrylic, and acrylic.

  Next, a spinning method using the spinning machine 1 will be described. In the following description, a method of generating the yarn Y using mist air after the machine stand of the spinning machine 1 or after changing the lot will be described as an example. The lot means the setting of spinning conditions, and after changing the lot, it can be rephrased as after changing the production yarn type.

  First, the operator sets the spinning unit 2 to be operated (to perform the spinning operation) using the input key 104 (input the number of spinning units 2). In addition, the type of raw material of the sliver S is input by the operator using the input key 104. The machine base control device 100 controls the amount of the additive mixed in the additive supply device 70 in accordance with the input raw material type of the sliver S.

  When the start of the spinning operation by the spinning unit 2 is input by the input key 104, the air distributor 60 opens the valve 66 and closes the valve 69 on the basis of an instruction from the machine control device 100, whereby the first air pipe Air is supplied to 62. The additive supply device 70 adjusts the opening and closing of the supply amount adjustment valve 75 based on an instruction from the machine control device 100 and sprays the additive stored in the additive storage tank 73 onto the first air pipe 62. At this time, the pressure adjustment device 72 of the additive supply device 70 adjusts the internal pressure of the additive storage tank 73 to a constant value (high pressure) based on an instruction from the machine control device 100. The unit controller 10 opens the opening / closing valve 63 a provided in the first distribution pipe 63. Accordingly, mist air is supplied to all the air spinning devices 7 that perform the spinning operation.

  The machine control device 100 instructs the unit controller 10 to start the spinning operation. The unit controller 10 starts a mist spinning operation in the spinning unit 2. Specifically, the unit controller 10 starts the operations of the draft device 6, the yarn storage device 11, and the winding device 13. The timing at which the mist spinning operation in the spinning unit 2 is started is different for each spinning unit 2. Therefore, in the spinning machine 1, when the machine controller 10 instructs the unit controller 10 to start the spinning operation, the spinning operation is sequentially performed from the spinning unit 2 for which preparation (yarn splicing work by the yarn splicing cart 3) has been completed. Is started. When the mist spinning operation is started, the sliver S is drafted by the draft device 6 and sent to the pneumatic spinning device 7. The yarn Y generated by the air spinning device 7 is stored in the yarn storage device 11 and wound on the package P by the winding device 13.

  The control of the supply amount adjustment valve 75 by the machine base control device 100 will be described in detail. The machine control device 100 controls the supply amount adjusting valve 75 so that the additive is supplied by intermittent control when the number of operating pneumatic spinning devices 7 that are actually operated (spun) is less than a predetermined number. At the same time, the duty ratio in the intermittent control is changed according to the number of operating units, and the supply amount of the additive is increased or decreased according to the number of operating units. The machine control device 100 controls the supply amount adjusting valve 75 so that the additive is continuously supplied when the number of operating units is a predetermined number or more, and supplies a constant amount of the additive. The predetermined number is, for example, 70% of all installed air spinning apparatuses 7. The predetermined number can be determined in consideration of the durability of the additive supply device 70, for example.

  When the machine control device 100 instructs the unit controller 10 to start the spinning operation, the machine control device 100 acquires the number of operating pneumatic spinning devices 7. When the unit controller 10 starts the spinning operation by the pneumatic spinning device 7, the unit controller 10 outputs a yarn traveling signal output from the yarn monitoring device 8 to the machine control device 100. The machine base control device 100 acquires the number of operating pneumatic spinning devices 7 in the spinning machine 1 based on the yarn traveling signal. The machine control device 100 determines that the pneumatic spinning device 7 of the spinning unit 2 is operating when the yarn traveling signal is output from the yarn monitoring device 8.

  When the machine control device 100 acquires the operating number of the pneumatic spinning devices 7, it determines whether the operating number is less than a predetermined number. When it is determined that the number of operating units is less than the predetermined number, the machine base control device 100 intermittently controls the supply amount adjustment valve 75. The intermittent control is control for alternately opening and closing the supply amount adjusting valve 75. Specifically, in the intermittent control, the additive is not supplied to the first air pipe 62 while the supply amount adjustment valve 75 is opened so that the additive is supplied to the first air pipe 62 (hereinafter referred to as an ON period). As described above, the period for closing the supply amount adjusting valve 75 (hereinafter referred to as the off period) is periodically repeated. Thereby, the additive is intermittently supplied to the first air pipe 62. The machine base control device 100 adjusts (changes) the supply amount of the additive supplied to the first air pipe 62 by adjusting the ON period and the OFF period in the supply amount adjustment valve 75.

When the operating number of pneumatic spinning devices 7 is less than a predetermined number, the machine control device 100 changes the duty ratio between the ON period and the OFF period in the intermittent control according to the operating number, and according to the operating number. Increase or decrease the supply amount of additives. In the present embodiment, the machine control device 100 linearly increases or decreases the supply amount of the additive according to the number of operating units. Specifically, the machine control device 100 sets the supply amount (ON time) of the additive based on the following relationship.
(On period / intermittent cycle period) = (Number of operating units / Number of scheduled air spinning units to operate)
The intermittent cycle period is a period of one cycle including the on period and the off period. The intermittent cycle period is set as appropriate. The scheduled number of operations is the number of pneumatic spinning devices 7 that perform the mist spinning operation (the number of operations set for operation), and is the number operated by the operator or automatically set. The maximum number of scheduled operating units is the number of pneumatic spinning devices 7 installed. The machine base control device 100 obtains the on-time based on the above relationship, and controls the supply amount adjusting valve 75 based on the on-time.

  When it is determined that the number of operating units is equal to or greater than the predetermined number, the machine control device 100 controls the supply amount adjusting valve 75 so that the additive is continuously supplied. The machine base control device 100 causes the first air pipe 62 to supply a certain amount of additive. Specifically, the machine base control device 100 sets the supply amount of the additive based on the scheduled number of operating air spinning devices 7 and the optimum amount of additive for one air spinning device 7. In other words, the machine base control device 100 controls the supply amount adjustment valve 75 so that an additive of (the number of scheduled operations of the air spinning device 7) × (optimum amount) is supplied. The optimum amount is appropriately set according to the type of sliver S and the like.

  In the spinning machine 1, for example, when it is desired to finish the mist spinning operation and remove an additive that may remain in each pneumatic spinning device 7, dry air is supplied to the pneumatic spinning device 7. You may do it. When a predetermined key of the input key 104 is operated, the air distribution device 60 closes the valve 66 and opens the valve 69 based on an instruction from the machine base control device 100. The unit controller 10 closes the open / close valve 63a and opens the open / close valve 65a. As a result, the supply of mist air from the first air pipe 62 to the air spinning device 7 is stopped, and the supply of dry air from the second air pipe 64 to the air spinning device 7 is started. The unit controller 10 closes the open / close valve 65a when a predetermined time has elapsed after the supply of dry air to the pneumatic spinning device 7 is started. As a result, the supply of dry air from the second air pipe 64 to the air spinning device 7 is stopped.

  As described above, in the spinning machine 1 according to the present embodiment, the machine control device 100 allows the supply amount adjustment valve 75 to be controlled when the number of operating air spinning devices 7 that are actually operated is less than a predetermined number. The duty ratio in intermittent control is changed according to the number of operating units, and the amount of additive supplied is increased or decreased according to the number of operating units. When the number of operating units is equal to or greater than the predetermined number, the machine base control device 100 controls the supply amount adjusting valve 75 to supply a constant amount of additive.

  As shown in FIG. 4A, the machine control device 100 supplies the additive when the number of operating pneumatic spinning devices 7 is less than a predetermined number (less than 40 in FIG. 4A). The amount (total spray amount) is increased linearly. The machine control device 100 supplies a certain amount of additive when the number of operating machines exceeds a predetermined number (40 or more). As a result, as shown in FIG. 4 (b), in the spinning machine 1, since the amount of additive corresponding to the number of operating the air spinning device 7 is supplied to the air, the supply amount of the additive is made uniform. I can plan. Therefore, in the spinning machine 1, it is possible to suppress an excessive supply of the additive to the air spinning device 7 of the spinning unit 2. As a result, the spinning machine 1 can stably supply the additive.

  In the example shown in FIG. 4A, the predetermined number is 40 units, and when the number of operating units is 40 units or more, the machine controller 100 supplies an example of a certain amount of additive. explained. In this regard, when the predetermined number is set to 40 or more, as shown in FIG. 5 (a), the machine control device 100 supplies the additive until the number of operating units reaches the predetermined number or more. Increase the amount linearly. At this time, as shown in FIG. 5B, in the spinning machine 1, the amount of additive according to the number of operating the air spinning devices 7 is supplied to the air, so that the supply amount of the additive is uniformized. It is illustrated.

  In the spinning machine 1 according to the present embodiment, the machine control device 100 controls the supply amount adjusting valve 75 so that the additive is continuously supplied when the number of operating machines exceeds a predetermined number. That is, the machine base control device 100 keeps the supply amount adjustment valve 75 open. Thereby, in the spinning machine 1, since the opening / closing of the supply amount adjusting valve 75 is not repeated when the number of operating units exceeds the predetermined number, the wear of the supply amount adjusting valve 75 can be suppressed. As a result, the service life (the number of years of use) of the supply amount adjusting valve 75 and, in turn, the service life of the additive supply device 70 can be extended.

  In the spinning machine 1 according to the present embodiment, the unit controller 10 controls the supply amount adjusting valve 75 when an instruction to start the spinning operation is input after starting up or after changing the lot. After the spinning machine 1 starts up or after a lot change, the spinning operations of the plurality of spinning units 2 are sequentially started. Therefore, in order to suppress fluctuations in the supply amount of mist air, it is particularly effective to control the supply amount according to the number of operating units after the spinning machine 1 is started up or after a lot change.

  In the spinning machine 1 according to the present embodiment, when the operating number is less than the predetermined number, the machine control device 100 supplies the additive according to the operating number as shown in FIG. Increase or decrease linearly. Thus, intermittent control can be facilitated by increasing or decreasing the supply amount linearly.

  In the spinning machine 1 according to this embodiment, the additive supply device 70 supplies the additive to the first air pipe 62 by applying pressure to the additive. The pressure adjusting device 72 of the additive supply device 70 maintains the internal pressure of the additive storage tank 73 constant. This eliminates the need for pressure control (adjustment), thereby simplifying the configuration and control.

In the spinning machine 1 according to the present embodiment, the machine control device 100, when the operating number is less than a predetermined number,
(On-time / intermittent cycle period) = (Number of operating units / Number of scheduled air spinning units to operate)
The supply amount of the additive is set based on the relationship. When the number of operating units is equal to or greater than a predetermined number, the machine base control device 100 determines the amount of additive based on the planned number of operating air spinning devices 7 and the optimum amount of additive for one air spinning device 7. Set the supply amount. Thus, by setting the supply amount of the additive, the supply amount of the additive can be made uniform.

  In the spinning machine 1 according to the present embodiment, only one of the first air pipes 62 for supplying mist air to the pneumatic spinning device 7 is used. In this configuration, since it is only necessary to control the supply amount of the additive supplied to one first air pipe 62, the supply amount can be controlled accurately and easily.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.

  In the embodiment described above, an example in which the machine base control device 100 acquires the operating number of the pneumatic spinning devices 7 based on the yarn traveling signal output from the yarn monitoring device 8 has been described as an example. However, a sensor for detecting the traveling of the yarn Y may be provided separately.

  Further, the machine control device 100 may acquire the number of operating pneumatic spinning devices 7 by other methods. For example, the spinning machine 1 may include a flow rate measuring device that measures the flow rate of air flowing through the first air pipe 62. The flow rate measuring device is provided on the upstream side of the valve 66 between the air supply pipe 67 and the first air pipe 62, for example. In this case, the machine control device 100 acquires the number of operating pneumatic spinning devices 7 based on the measurement result of the flow rate measuring device. There is a correlation between the flow rate of the air flowing through the first air pipe 62 and the number of operating the air spinning devices 7. Therefore, the machine control device 100 can acquire the number of operating air spinning devices 7 from the measurement result of the flow rate measuring device.

  In the embodiment described above, an example in which the first distribution pipe 63 and the second distribution pipe 65 are connected to the swirling airflow generation nozzle via a common shuttle valve has been described. However, the first distribution pipe 63 and the second distribution pipe 65 may be independently connected to the pneumatic spinning device 7. Specifically, for example, the first distribution pipe 63 is directly connected to the pneumatic spinning device 7 (the nozzle provided in the nozzle block 40 (for example, the nozzle provided in the fiber guide portion 41)), and the second distribution pipe 63 is connected. The pipe 65 may be connected to the pneumatic spinning device 7 (a nozzle different from the nozzle to which the first distribution pipe 63 is connected) via a check valve. According to such a configuration, since the route through which mist air and dry air circulate is different, when dry spinning is performed, the remainder of the additive during mist spinning is not included in the dry air. Therefore, the influence of the additive during dry spinning can be suppressed. Moreover, it can be set as a simple structure. Since the second distribution pipe 65 is connected to the air spinning device 7 via a check valve, the mist air is prevented from flowing into the second distribution pipe 65.

  In the embodiment described above, the pressure adjustment device 72 of the additive supply device 70 has been described as an example in which the internal pressure of the additive storage tank 73 is adjusted to a constant value based on an instruction from the machine control device 100. However, the internal pressure of the additive reservoir 73 may be varied.

  In the said embodiment, the form which the pressure regulator 72 is a pressure increase valve or an electric compressor demonstrated to an example. However, the pressure regulator 72 may be an electronic regulator. In this configuration, the pressure adjusting device 72 can adjust the internal pressure of the additive storage tank 73 by pressurizing the air guided to the additive storage tank 73 according to the operating status of the spinning unit 2, for example. Specifically, when the pressure adjusting device 72 receives a signal related to the operation status of the spinning unit 2 output from the machine control device 100, the pressure adjusting device 72 adjusts the internal pressure of the additive storage tank 73 according to the signal. Thus, mist air corresponding to the operating status of the spinning unit 2 is supplied to the first air pipe 62. Further, the pressure adjusting device 72 may adjust the internal pressure of the additive storage tank 73 according to the type (yarn type) and / or count of the sliver S.

  In the embodiment described above, an example in which the yarn Y is generated using mist air after the machine stand of the spinning machine 1 or after a lot change has been described. In other words, an example has been described in which the machine control device 100 controls the supply amount adjusting valve 75 when an instruction to start a spinning operation is input after the machine stands up or after a lot change. However, the machine base control apparatus 100 may control the supply amount adjustment valve 75 immediately before the machine base stops or immediately before the lot change (when the number of spinning units 2 operating decreases). Immediately before stopping the machine base or immediately before changing the lot, the operations of the plurality of spinning units 2 are sequentially stopped. Therefore, in order to suppress fluctuations in the supply amount of mist air, it is particularly effective to control the supply amount according to the number of operating units. As described above, in the present invention, the machine control device 100 is configured to change the operating number of the plurality of spinning units 2 (when an instruction to start a spinning operation after the machine stands up or after a lot change is input ( When the number of spinning units 2 increases), the supply amount adjustment valve 75 (supply device) is controlled immediately before the machine base stops or immediately before the lot change.

  The yarn joining device 26 may be a piecer using a seed yarn.

  The pneumatic spinning device 7 may prevent the twist of the fiber bundle from being transmitted to the upstream side of the pneumatic spinning device by the downstream end portion of the fiber guide portion instead of the needle. The pneumatic spinning device may include a pair of air jet nozzles for twisting the fiber bundle in opposite directions instead of the above configuration. The spinning machine may be an open-end spinning machine.

  In the spinning unit 2, the yarn storage device 11 has a function of drawing the yarn Y from the pneumatic spinning device 7. However, the yarn Y may be drawn from the pneumatic spinning device 7 by the delivery roller and the nip roller. When the yarn Y is pulled out from the pneumatic spinning device 7 by the delivery roller and the nip roller, a slack tube or a mechanical compensator that absorbs slackness of the yarn Y by a suction air flow may be provided instead of the yarn accumulating device 11.

  In the spinning machine 1, in the height direction, each device is arranged so that the yarn Y supplied on the upper side is wound on the lower side. However, each device may be arranged so that the yarn supplied on the lower side is wound up on the upper side.

  In the spinning machine 1, at least one of the bottom rollers of the draft device 6 and the traverse guide 23 are driven by power from the second end frame 5 (that is, common to the plurality of spinning units 2). However, each part of the spinning unit 2 (for example, a drafting device, an air spinning device, a winding device, etc.) may be driven independently for each spinning unit 2.

  In the traveling direction of the yarn Y, the tension sensor 9 may be arranged on the upstream side of the yarn monitoring device 8. The unit controller 10 may be provided for each spinning unit 2. In the spinning unit 2, the waxing device 12, the tension sensor 9, and the yarn monitoring device 8 may be omitted.

  In FIG. 1, the spinning machine 1 is illustrated so as to wind up the cheese-shaped package P, but it is also possible to wind up the cone-shaped package. In the case of a cone-shaped package, yarn slack is generated by traverse of the yarn, but the slack can be absorbed by the yarn storage device 11. The material and shape of each component are not limited to the materials and shapes described above, and various materials and shapes can be employed. As long as mist air can be supplied to each spinning unit 2, the configuration of the air distribution device 60, the additive supply device 70, and the like is not limited to the configuration of the above embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Spinning machine, 7 ... Pneumatic spinning device, 13 ... Winding device, 70 ... Additive supply device (supply device), 75 ... Supply amount adjustment valve (supply device), 100 ... Machine stand control device (control device), B ... bobbin, F ... fiber bundle, P ... package, S ... sliver (fiber bundle).

Claims (11)

A plurality of spinning units each having an air spinning device that generates yarn by a spinning operation that twists the fiber bundle with air, and a winding device that winds the yarn around a bobbin to form a package;
Upstream of a plurality of supply pipes that supply the air to each of the pneumatic spinning devices of the plurality of spinning units, and an air pipe through which the air flows;
A supply device for supplying an additive to the air pipe;
A control device for controlling the operation of the supply device,
The controller is
When the operating number of the air spinning device is less than a predetermined number, the supply device is controlled so that the additive is supplied by intermittent control, and the duty ratio in the intermittent control is set according to the operating number. Change, increase or decrease the supply amount of the additive according to the number of operating units,
When the operating number is equal to or greater than a predetermined number, the spinning machine controls the supply device so that the additive is continuously supplied and supplies a constant amount of the additive.   2. The spinning machine according to claim 1, wherein, when the number of operating units is less than a predetermined number, the control device linearly increases or decreases the supply amount of the additive according to the number of operating units.   The spinning machine according to claim 1 or 2, wherein the supply device supplies the additive to the air pipe by applying a constant pressure to the additive.   The said control apparatus controls the said supply apparatus immediately before a machine stand stop or immediately before a lot change, when the instruction | indication which starts the said spinning operation after a machine standup or after a lot change is input. A spinning machine according to claim 1. The controller is
When the operating number is less than a predetermined number,
(Period for supplying the additive / intermittent cycle period) = (Number of operating units / Number of scheduled operating units of the pneumatic spinning device)
Based on the relationship, the supply amount of the additive is set,
When the operating number is equal to or greater than a predetermined number, the supply amount of the additive is determined based on the planned operating number of the air spinning device and the optimum amount of the additive for one pneumatic spinning device. The spinning machine according to any one of claims 1 to 4, which is set.   The spinning machine according to any one of claims 1 to 5, wherein the number of the air pipes is one.   The spinning machine according to any one of claims 1 to 6, wherein the air pipe extends along an arrangement direction of the plurality of spinning units.   The spinning machine according to any one of claims 1 to 7, wherein the control device acquires the operating number based on a yarn traveling signal output from each spinning unit. A flow measuring device for measuring the flow rate of the air flowing through the air pipe;
The spinning machine according to any one of claims 1 to 7, wherein the control device acquires the number of operating units based on a measurement result of the flow rate measuring device.   The spinning machine according to any one of claims 1 to 8, wherein the air containing the additive is supplied only to the pneumatic spinning device that is operating. A plurality of spinning units each having an air spinning device that generates yarn by a spinning operation that twists the fiber bundle with air, and a winding device that winds the yarn around a bobbin to form a package, and a plurality of the spinning devices. A spinning machine comprising: an air pipe connected to the upstream side of a plurality of supply pipes that supply the air to each of the air spinning apparatuses of a unit, and an air pipe through which the air flows; and a supply apparatus that supplies an additive to the air pipe A spinning method carried out in
When the operating number of the air spinning device is less than a predetermined number, the supply device is controlled so that the additive is supplied by intermittent control, and the duty ratio in the intermittent control is set according to the operating number. Change, increase or decrease the supply amount of the additive according to the number of operating units,
A spinning method in which when the number of operating units is equal to or greater than a predetermined number, the supply device is controlled so that the additive is continuously supplied and a certain amount of the additive is supplied.

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