JPH0252009B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention provides a method for supplying cotton fibers, which have been opened and dust removed by a cotton mixing machine, directly to a group of hoppers by means of an air flow. It is related to the device.

[Conventional technology]

Conventionally, this type of device feeds cotton by sequentially opening each distribution damper that opens and closes each hopper at regular intervals, or when the amount of cotton detected by a level sensor is at the lowest level. Cotton was fed continuously until the hoppa rose one level from the lowest level.

[Problem that the invention seeks to solve]

However, in the former case, even if each distribution damper is open for the same time, the amount of cotton supplied to each hopper varies, and since there is a large variation in the amount of cotton in each hopper in the initial state, There was a large variation in the amount of cotton in each hopper.

In the latter case, control is performed on a level-by-level basis, so variations of about one level are unavoidable.Also, even if the number of level sensors to be arranged is increased to improve accuracy, it is difficult to arrange them in terms of space, cost, etc. The number was limited and there was a limit to accuracy improvement.

In this way, because the amount of cotton in each hopper varies widely, there is a time lag in the amount of cotton in each hopper being consumed by the carding machine, etc., and the amount of cotton in each hopper becoming zero. When switching to supply, it was necessary to wait until the amount of cotton in the final hopper became zero. As a result, there was a time loss and efficiency was poor.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cotton feeding device for a hopper that maintains the amount of cotton in each hopper substantially constant, reduces time loss during switching of feed material fibers, and improves efficiency.

[Means for solving problems]

The cotton feeding time to the hopper of this invention is determined by the following steps: a supply device that pneumatically transports the opened raw material fibers to a plurality of hoppers via a duct; a sorting damper; a plurality of level sensors provided in the hopper to detect the amount of cotton in each hopper at a plurality of levels; an input section for inputting a detection signal of the level sensor; and an input section for opening and closing each of the sorting dampers. an output unit that operates the hopper, and a storage unit that stores each cotton feeding time required to fill each level section between two adjacent levels of each hopper as each actual level section cotton feeding time; In response to a signal from the input section, a level one level higher than the level of the cotton amount of the hopper with the smallest amount of cotton is set as the target cotton feeding level, and one or more cotton feeding levels whose cotton amount is less than this target cotton feeding level are set. One by one, the hoppers are selected as supply hoppers to be supplied with cotton, and only the distribution damper of the selected supply hopper is opened, and then the set cotton supply time elapses and the cotton amount of the supply hopper reaches the target cotton supply level. a determination unit that provides a signal to the output unit to stop the cotton feeding to the supply hopper at the earlier of the times when cotton is fed to the supply hopper; and and a sequencer comprising a time calculation unit which provides the time calculated by dividing the average value by an integer of 2 or more as the set cotton feeding time for the level section to the determination unit.

[Effect]

According to the configuration of the present invention, the determination unit of the sequencer sets the target cotton feeding level to one or more levels higher than the cotton amount level of the hopper with the smallest cotton amount, and One or more hoppers are selected one by one as the cotton feeding hopper to feed cotton, and only the distribution damper of the selected feeding hopper is opened to feed cotton, and then the set cotton feeding time elapses and the feeding hopper The supply of cotton to the supply hopper is stopped at the earlier of the time when the amount of cotton reaches the target cotton supply level. When all the hoppers reach the target cotton feeding level, a new target cotton feeding level is set and the same cotton feeding is performed. By repeating these operations, the amount of cotton in each hopper, which initially varied, becomes almost equal. Here, each hopper is sequentially fed with cotton at a certain set cotton feeding time in each level section, but this set cotton feeding time is the past actual level section cotton feeding time in the level section where cotton is fed. It is calculated by dividing the average value of by an integer greater than or equal to 2. Therefore, when feeding cotton to multiple hoppers with varying cotton volume levels, the installation interval of multiple level sensors installed in the hopper should be set to 2 or more. It is possible to switch at fine intervals divided by an integer of , and when feeding cotton sequentially to multiple hoppers, it is possible to adjust the variation in the level of cotton amount between each hopper with finer level differences than the installation interval of multiple level sensors. can. As a result, at the end of the lot, each hopper can be emptied at approximately the same time, and the waiting time when changing lots can be minimized.

In this way, the amount of cotton in each hopper is always kept almost constant, so even when the carding machine etc. card a certain amount of cotton from each hopper, the amount of cotton in each hopper becomes zero almost at the same time. . Therefore, there is less time loss when switching the feedstock fibers, and efficiency is improved.

〔Example〕

An embodiment of the present invention will be described based on FIGS. 1 and 2. The cotton feeding device to the hopper includes a supply device 1 that pneumatically transports opened raw material fibers to a plurality of hoppers 3 via a duct 2, and a plurality of supply devices installed at the entrance of each hopper 3 to open and close each hopper 3. a sorting damper 4, a plurality of level sensors 5 provided in each hopper 3 to detect the amount of cotton in each hopper 3 at a plurality of levels, an input section 7 for inputting the detection signal of the level sensor 5, and each An output unit 11 that operates the opening/closing of the distribution damper 4, and two adjacent hoppers of each hopper.
A memory section 8 stores each cotton feeding time required to fill each level section between the two levels as each actual level section cotton feeding time, and a storage section 8 receives a signal from the input section 7 and stores the cotton feeding time required to fill each level section between the two levels. The target cotton feeding level is set to one level higher than the level of the cotton amount of the smaller hopper 3, and the supply hopper to which one or more hoppers 3 whose cotton amount is less than the target cotton feeding level is to be fed one by one. 20, and only the distribution damper 4 of the selected supply hopper 20 is opened, and then the set cotton supply time elapses or the time when the cotton amount of the supply hopper 20 reaches the target cotton supply level, whichever is earlier. a determining unit 9 that gives a signal to the output unit 11 to stop feeding cotton to the supply hopper 20; and dividing the average value of past performance level section cotton feeding times in the level section where cotton is fed by an integer of 2 or more. The sequencer 6 includes a time calculation section 10 which supplies the time calculated by the above to the determination section 9 as the set cotton feeding time for the level section.

The supply device 1 includes a charging pit 13, a stock bin 14, a dust remover 15, an oiling machine 16, and a blower 17, and supplies the cotton fibers after opening and removing dust from the raw cotton 12 to a plurality of hoppers 3 through a duct 2. . Hopper 3 has card 1 with carding machine at the bottom.
It is a tower-shaped card hopper connected to 8.
It stores cotton fibers to be supplied to the carding machine. The distribution damper 4 is a lid-shaped member provided on the top surface of each hopper 3. The level sensor 5 consists of a cantilevered horizontal lever section and a limit switch with a spring. When the cotton fibers on the horizontal lever become dense, their weight forces the horizontal lever to tilt downward against the spring, turning the switch on. When the cotton fibers on the horizontal lever become sparse and the weight on the horizontal lever becomes lighter, the spring forces the horizontal lever to return to its original horizontal position, turning the switch off.

The sequencer 6 includes an input section 7, a storage section 8, a judgment section 9, a time calculation section 10, and an output section 11.
The input section 7 inputs the on/off detection signal from the level sensor 5. The storage unit 8 stores each performance level section cotton feeding time T (X, Y, Z) as a three-dimensional array of a hopper number (X), a level section number (Y), and the number of times of learning of the same level section (Z).
The time calculation unit 10 calculates the past cotton feeding time T for each level section.
Average value T _M (X, Y, Z) for each level section of (X, Y, Z)
Calculate Y) as the number of learning times as T _M (X, Y) = 1/n _o 〓 ^{Z = 1} T (X, Y, Z), and set the set cotton feeding time for each level section.
T _S (X, Y) is calculated as T _S (X, Y)=1/ _mTM (X, Y), where the number of level section divisions is m.

Operation FIG. 2 shows the flow of operation of the cotton feeding device of this embodiment. In step _S1 , initial settings are performed.
Set the level section division number m. Furthermore, when the type of raw material fiber is switched, all past data is cleared because the data when the old raw material fiber was supplied cannot be used when the new raw material fiber is supplied.
If the type of raw material fiber does not change, do not clear it because past data can be used.

The determination unit 9 of the sequencer 6 grasps the cotton amount level of the hopper 3 with the smallest amount of cotton based on the detection signal of the level sensor 5 inputted to the input unit 7, and sets the level one level higher than this level to the target cotton supply. level (step _S2 ). The judgment unit 9 selects one of the hoppers 3 whose amount of cotton is less than the set target cotton supply level.
one as the supply hopper 20 (step
S ₃ ), set the set cotton feeding time T _S (X, Y) (step S ₄ ), and set the distribution damper 4 of this supply hopper 20.
is opened via the output section 11, and the distribution dampers of the other hoppers 3 are controlled to be closed (step _S5 ).
In this way, cotton feeding is started to one of the hoppers 3 whose target cotton feeding level is not reached. At this time, for the set cotton feeding time T _S (X, Y), if there is no past data in the cotton feeding level section of the cotton feeding hopper 20, an arbitrary value T is adopted as the initial value.

In step _S6 , it is determined whether the set cotton feeding time T _S (X, Y) has been completed since the cotton feeding to the supply hopper 20 has started, and if it has been completed, the process advances to step _S9 ; If so, proceed to step _S7 . In step _S7 , it is determined whether the level sensor 5 of the target cotton feeding level of the supply hopper 20 is on, and if it is on, the actual level section cotton feeding time T (X, Y, Z) in the level section where the cotton was fed is stored. If it is turned on (step _S8 ), proceed to step _S9 , and if it is not on, return to step _S6 .

In step _S9 , it is determined whether all the hoppers 3 have achieved the target cotton feeding level. If the target cotton feeding level has been achieved, the process proceeds to step _S10 ; if not, the process returns to step _S3 . When the process returns to step _S3 , a new supply hopper 20 is selected from among the hoppers 3 that have not yet reached the target cotton supply level (step _S3 ).
Similar operations are performed up to step _S9 .

The operations from step S ₃ to step S ₉ are repeated, and one of the hoppers 3 that do not reach the target cotton feeding level is sequentially selected as the feeding hopper 20 and the set cotton feeding time T _S (X, Y) is Cotton feeding is carried out. However, when this supply hopper 20 reaches the target cotton supply level, the supply of cotton from that supply hopper 20 is finished and the supply of cotton to the next supply hopper 20 is started. Then, all the hoppers 3 reach the target cotton supply level and the process proceeds to step _S10 .

In step _S10 , the time calculation unit 1 uses the actual level section cotton feeding time T (X, Y, Z) stored at the time of completion of cotton feeding in each level section of the supply hopper 20.
0 calculates the average value T _M (X, Y) for each level section, and further calculates the set cotton feeding time T _S (X, Y) for each level section.
Y) is calculated.

In step _S11 , it is determined whether all hoppers 3 are full, and if they are full, the supply device 1 is automatically stopped (step _S12 ), and if not full, the process returns to step _S2 .
If the process returns to step _S2 , a new target cotton supply level that is one level higher than the previous target cotton supply level is set (step _S2 ), and the same operation is performed up to step _S11 . The operations from step _S2 to step _S11 are repeated until all hoppers 3 are full, and step S11 is repeated.
Proceed to _S12 and automatically stop the supply device 1.

Note that the set cotton feeding time T _S (X, Y) is set at step S ₂ even when T is adopted as the initial value.
By repeating the flow from ~step _S11 , data is accumulated and values suitable for each level section of each hopper 3 are obtained.

Further, when selecting one of the hoppers 3 whose cotton amount does not meet the target cotton supply level as the supply hopper 20, the one with the smallest amount of cotton may be selected,
Each hopper 3 may be numbered and selected in the numerical order.

In this way, the judgment unit 9 of the sequencer 6 sets the level one level higher than the level of the cotton amount of the hopper 3 with the smallest amount of cotton as the target cotton feeding level, and determines the cotton amount that is less than this target cotton feeding level. One or more hoppers 3 are selected one by one as the supply hopper 20 to be supplied with cotton, and only the distribution damper 4 of the selected supply hopper 20 is opened to supply the cotton, and then when the set cotton supply time has elapsed and The supply of cotton to the supply hopper 20 is stopped at the earlier time when the amount of cotton in the supply hopper 20 reaches the target cotton supply level. Then, when all hoppers 3 reach the target cotton supply level,
Set a new target cotton feeding level and perform the same cotton feeding. By repeating this operation, the amount of cotton in each hopper 3, which varied in the initial state, becomes almost equal. Here, each hopper 3 is sequentially fed with cotton at a fixed set cotton feeding time T _S (X, Y), and this set cotton feeding time T _S
(X, Y) is the past performance level section cotton feeding time T (X, Y,
Since the average value T _M (X, Y) of Z) is subdivided into multiple parts and calculated as 1/m T _M (X, Y), it is difficult to feed cotton to multiple hoppers 3 with varying cotton volume levels. can be switched at fine intervals obtained by dividing the installation interval of the plurality of level sensors 5 provided in the hopper 3 by an integer of 2 or more, and the cotton amount level between each hopper 3 when cotton is sequentially fed to the plurality of hoppers 3. It is possible to accurately equalize the variations in level with finer level differences than the installation intervals of the plurality of level sensors 5. As a result, at the end of the lot, each hopper 3 can be emptied at approximately the same time, and the waiting time when changing lots can be minimized.

In this way, the amount of cotton in each hopper 3 is always kept almost constant, so when each card 18 of each hopper 3 carding a certain amount of cotton, the amount of cotton in each hopper 3 is kept almost at the same time. becomes zero. Therefore, there is less time loss when switching the feedstock fibers, and efficiency is improved.

In the above embodiments, cotton fibers were used as the raw material fibers, but any cotton-like material such as wool, short silk fibers, short synthetic fibers, etc. may be used.

〔Effect of the invention〕

According to the cotton feeding device to a hopper of the present invention, the determination unit sets the target cotton feeding level to one level higher than the level of the cotton amount of the hopper with the smallest amount of cotton, and the target cotton feeding level is satisfied. One or more hoppers with an amount of cotton that does not have the same amount of cotton are selected one by one as the supply hopper to be fed, and only the distribution damper of the selected supply hopper is opened, and then the set cotton feeding time elapses and the cotton of the supply hopper is opened. The cotton feeding to the supply hopper is stopped at the earlier of the time when the amount reaches the target cotton feeding level, and the time calculation section calculates the past performance level section cotton feeding time in the cotton feeding level section. Since the time calculated by dividing the average value by an integer of 2 or more is given to the judgment unit as the set cotton feeding time for that level section, feeding to multiple hoppers with varying cotton amount levels is possible. The cotton can be switched at fine intervals obtained by dividing the installation interval of multiple level sensors installed in the hopper by an integer of 2 or more, and when feeding cotton sequentially to multiple hoppers, variations in the cotton amount level between each hopper can be reduced. It is possible to arrange level differences more finely than the installation intervals of multiple level sensors, and at the end of the lot, each hopper can be emptied at approximately the same time, minimizing waiting time when changing lots. There is an effect.

In this way, the amount of cotton in each hopper is always kept almost constant, so even when the carding machine etc. card a certain amount of cotton from each hopper, the amount of cotton in each hopper becomes zero almost at the same time. . Therefore, there is less time loss when switching the feedstock fibers, and efficiency is improved.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a flowchart of its operation. 1... Supply device, 2... Duct, 3... Hopper, 4...
Distribution damper, 5... Level sensor, 6... Sequencer, 7... Input section, 8... Storage section, 9... Judgment section, 10
...Time calculation section, 11...Output section.

Claims (1)

[Scope of Claims] 1. A supply device that pneumatically transports opened raw material fibers to a plurality of hoppers via a duct; a plurality of sorting dampers that are provided at the entrance of each of the hoppers and open and close each of the hoppers; a plurality of level sensors provided in each of the hoppers to detect the amount of cotton in each of the hoppers at a plurality of levels; an input section for inputting a detection signal of the level sensor; and an input section for operating opening and closing of each of the distribution dampers. an output section, a storage section for storing each cotton feeding time required to fill each level section between two adjacent levels of each hopper as each actual level section cotton feeding time, and the input section. In response to a signal from the hopper, one level higher than the level of the cotton amount of the hopper with the smallest amount of cotton is set as the target cotton feeding level, and one or more hoppers whose cotton amount is less than this target cotton feeding level are sequentially removed. One unit at a time is selected as a supply hopper to supply cotton, and only the distribution damper of the selected supply hopper is opened, and then the set cotton supply time has elapsed and the cotton amount of the supply hopper has reached the target cotton supply level. a determination unit that gives a signal to the output unit to stop feeding cotton to the supply hopper at whichever is earlier of the time, and an average value of the past performance level section cotton feeding time in the level section where cotton is fed. and a sequencer comprising a time calculation section which supplies the time calculated by dividing by an integer of 2 or more as the set cotton feeding time for the level section to the determination section.