CN212771092U - Intelligent bale plucker with foreign fiber detection and removal functions - Google Patents

Abstract

An intelligent bale plucker with a foreign fiber detecting and removing function. The cotton grabbing machine with the foreign fiber detection and removal function comprises a foreign fiber detection device, two groups of foreign fiber removal devices and a foreign fiber detection processing electric control system, wherein the foreign fiber detection device and the foreign fiber removal devices are arranged on a cotton grabbing arm; the foreign fiber detection device comprises a detection support, a high-precision camera, a lighting lamp and a shooting shading lampshade, wherein the high-precision camera, the lighting lamp and the shooting shading lampshade are arranged on the detection support; the intelligent cotton grabbing machine with the foreign fiber detection and removal function can detect and remove foreign fibers from the initial stage of cotton spinning production, the detection rate of the visible foreign fibers on cotton bales is up to more than 99%, the production efficiency of subsequent processes is greatly improved, the requirement on manual labor is reduced, the content of the foreign fibers is reduced, and the purpose of improving the product quality is finally achieved.

Description

Intelligent bale plucker with foreign fiber detection and removal functions

[ technical field ] A method for producing a semiconductor device

The utility model relates to a spinning machine in cotton processing field especially relates to a spinning machine who clears away heterochrosis fibre.

[ background of the invention ]

Foreign fiber is foreign fiber, which is derived from non-cotton fiber and non-natural color cotton fiber mixed into raw cotton during picking, purchasing and processing of raw cotton, such as chemical fiber, grass, leaf, hair, silk, hemp, plastic film, dyeing line, etc.

Foreign fibers are not only difficult to remove during the spinning process, but also are stretch broken or carded into shorter, finer and more fibrous fine defects during the trash removal process. The foreign fiber seriously affects the quality of cotton yarn and cloth, leads to uneven dyeing, affects the appearance and further affects the sale of cotton textiles and clothes. Currently, with the development of textile technology and the continuous improvement of consumption level, the requirement of consumers for different fibers in cotton textiles is higher and higher, and the different fibers are a focus of attention in the textile industry.

At present, the method for removing the foreign fibers mainly comprises five methods: firstly, manually picking and removing foreign fibers; secondly, installing a foreign fiber detecting and removing device in the opening and picking process; thirdly, a foreign fiber detecting and removing device is installed in the cotton carding and combining process; fourthly, the function of the electronic yarn clearer is expanded on the bobbin winder; fifthly, performing cloth cover repair in the cloth cover inspection link of the fabric.

(1) The manual picking of the foreign fibers is generally arranged before raw cotton is put into production, the detection of the foreign fibers is mainly carried out by a manual eye detection method, and then the foreign fibers are manually picked. According to the investigation, 1-3 packages of raw cotton can be averagely detected every day by each person according to the difference of the foreign fiber containing degree of the raw cotton or the difference of the yarn quality requirement, the labor is required to be more than 60 persons for a cotton textile enterprise with the average scale of 30000 spindles, the removal method has the advantages of more labor and high cost, the foreign fiber detection is completely influenced by human factors, and the foreign fiber removal rate is unstable;

(2) the method is characterized in that a foreign fiber removing device is installed in the opening and picking process, which is a common method for removing foreign fibers at present, a foreign fiber machine is usually installed behind the last machine table in the opening and picking process, a photoelectric sensor, an ultrasonic principle or an optical principle is adopted to detect the foreign fibers, and a removed object is sprayed out.

(3) The different fiber detection device is arranged in the carding and combining process, is a sensor type different fiber detection device, is arranged on a guide frame of a carding machine and a drawing frame, detects out the colored and dirty cotton sliver by detecting the brightness change of the cotton sliver passing through a transparent guide tube, but the method and the second method have the same defects, and other tiny different fibers are wrapped in the cotton sliver, so that the different fiber removal rate is reduced.

(4) The electronic yarn clearer is arranged on the bobbin winder, so that each millimeter of yarn can be detected and monitored, micro foreign fibers can be detected and removed, and finally the requirement of the market on foreign fiber removal rate can be met, but the efficiency of the bobbin winder is greatly reduced, the cutting frequency is increased, and the production efficiency is even lower than 50%.

(5) The cloth cover picking and repairing is to detect and remove the foreign fibers on the cloth cover of the finished product, and also belongs to manual operation, one method is to manually remove pieces of the cloth to be detected, the other method is to use a blower to heat melt the foreign fibers, so that the foreign fibers shrink after being melted, the cloth cover picking and repairing has higher requirements on the vision and the skill of workers, the efficiency is lower, and the foreign fibers are removed by adopting the two methods, so that the cloth cover can be damaged.

In summary, it can be seen that the different fiber removing technologies of the above different methods have some defects in various different fiber processing modes, and as the raw cotton production process is gradually advanced backwards, the difficulty in removing different fibers is also increasing, so how to more thoroughly and more reliably remove different fibers in textile fibers is a problem that is at present a key challenge in the textile industry.

[ Utility model ] content

The utility model aims at providing an intelligence plucker with function is visited to different fine.

The utility model adopts the following technical scheme:

the bale plucker is the first process of opening and picking, picks cotton blocks or fiber bundles from cotton bales or chemical fiber bales, conveys the cotton blocks or fiber bundles to a next machine through air flow, and can open and mix the cotton blocks or the fiber bundles through the bale plucker. The foreign fiber detection and removal device is additionally arranged on the bale plucker, foreign fibers can be removed from the source of cotton blocks or fiber bundles, and the design scheme of the foreign fiber removal process is reasonable.

The cotton plucker with foreign fiber detection and removal functions used in the method for removing the cotton opening and cleaning foreign fibers comprises a cotton plucker body main body, a cotton plucking arm, two groups of foreign fiber detection devices, two groups of foreign fiber removal devices, a foreign fiber detection processing electric control system, a foreign fiber mechanism mounting frame and a foreign fiber collection bag, wherein the foreign fiber detection devices, the foreign fiber removal devices, the foreign fiber mechanism mounting frame and the foreign fiber collection bag are all arranged on the cotton plucking arm; the foreign fiber detection device comprises a detection bracket, a high-precision camera, an illuminating lamp and a shooting shading lampshade, wherein the high-precision camera, the illuminating lamp and the shooting shading lampshade are arranged on the detection bracket;

the foreign fiber removing device is a mechanical arm grabbing and removing structure or a pneumatic sucking and removing structure;

the manipulator grabbing and clearing structure is shown in figures 2-8 and comprises a manipulator, a linear module and a servo motor, wherein the manipulator is installed on a sliding block of the linear module, the servo motor is installed at the end part of the linear module, and the sliding block in the linear module drives the manipulator to move linearly by controlling the transmission of a screw rod in the linear module.

Furthermore, the manipulator comprises a mechanical finger, a manipulator support, a manipulator opening and closing cylinder, a manipulator lifting cylinder, a mechanical finger mounting disc, a fixed pin shaft and a movable pin shaft, wherein the root of the mechanical finger is connected to the mechanical finger mounting disc through the movable pin shaft, the mechanical finger drives the movable pin shaft to slide in a chute of the mechanical finger mounting disc, a joint of the mechanical finger is connected to the manipulator support through the fixed pin shaft, the mechanical finger can rotate around the fixed pin shaft, the manipulator opening and closing cylinder is fixed to the manipulator support, a cylinder rod is fixed to the mechanical finger mounting disc, and the opening and closing of the mechanical finger can be realized through the telescopic action of the cylinder rod; the grabbing action of the target foreign fiber object is realized;

the manipulator lifting cylinder is fixed on a sliding block of the linear module, and the manipulator moves along with the sliding block on the linear module to realize longitudinal linear movement of the cotton grabbing arm; the manipulator bracket is fixed on a cylinder sliding block of a manipulator lifting cylinder, and the cylinder sliding block drives a mechanical finger to move up and down, so that the manipulator can accurately move to the longitudinal position of the foreign fiber object on the cotton grabbing arm, and the mechanical finger of the manipulator is aligned to the foreign fiber object;

the foreign fiber detection processing electric control system comprises an image analysis and control unit and a PLC control unit, wherein foreign fiber detection devices are used for imaging foreign fibers of cotton, generated pictures are input into the image analysis and control unit, the image analysis and control unit is mainly integrated by a low-power consumption industrial personal computer, AI calculation is carried out on images collected by the foreign fiber detection devices in real time, the foreign fibers are analyzed and identified, coordinates of the foreign fibers are calculated, the foreign fiber coordinates are read by the PLC control unit, after the foreign fiber coordinates are read, a grabbing command is sent to a foreign fiber clearing device, and the foreign fiber clearing device is used for grabbing and collecting the foreign fibers.

In the working process of the cotton grabbing machine, the foreign fiber detection device shoots and images the upper surface of the cotton bale in real time, the foreign fiber detection processing electric control system judges whether foreign fibers exist or not according to imaging data and determines the positions of the foreign fibers, then the foreign fiber detection processing electric control system sends execution signals to the foreign fiber removal device, finally the foreign fibers are collected by the foreign fiber removal device, and the foreign fiber collection bag is placed.

The pneumatic suction structure, as shown in fig. 11 and 12, comprises a suction fan, a suction pipe, a different fiber suction nozzle and a pneumatic valve, wherein the different fiber suction nozzle and the pneumatic valve are connected in series and then communicated with the suction pipe, and the suction fan is in a normally open state.

The foreign fiber detection processing electric control system calculates the position of the foreign fiber, the pneumatic valve at the position corresponding to the foreign fiber is opened, the foreign fiber is sucked into the air suction pipe by the foreign fiber suction nozzle, and finally the foreign fiber is sucked into the foreign fiber collection bag.

It should be noted that, due to the particularity of the operation of the reciprocating bale plucker, the different fiber detection devices and the different fiber clearing devices are arranged into two groups.

The two groups of different fiber detection devices and the different fiber clearing devices are respectively arranged on two sides of the cotton grabbing arm, when the cotton grabbing machine reciprocates, the two groups of different fiber detection devices and the different fiber clearing devices work intermittently, when the cotton grabbing machine moves towards the A direction, the first group of different fiber detection devices and the different fiber clearing devices are in a working state, and when the cotton grabbing machine moves towards the B direction, the second group of different fiber detection devices and the different fiber clearing devices are in a working state. Similarly, when the cotton grabbing arm rotates 180 degrees along with the rotating tower, the cotton grabbing machine moves towards the direction A, the second group of different fiber detection devices and the different fiber clearing devices are in working states, and when the cotton grabbing machine moves towards the direction B, the first group of different fiber detection devices and the different fiber clearing devices are in working states.

The intelligent cotton grabbing machine with the foreign fiber detection and removal function can detect and remove foreign fibers from the initial stage of cotton spinning production, the detection rate of the visible foreign fibers on cotton bales is up to more than 99%, the production efficiency of subsequent processes is greatly improved, the requirement on manual labor is reduced, the content of the foreign fibers is reduced, and the purpose of improving the product quality is finally achieved.

[ description of the drawings ]

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of the left side detection device of FIG. 1 with the left side removed;

FIG. 3 is a top view of FIG. 1; namely the reciprocating motion of the plucker;

FIG. 4 is a schematic structural diagram of a foreign fiber detection device;

FIG. 5 is a schematic perspective view of the foreign fiber detection device;

FIG. 6 is a perspective view of the foreign fiber removing device;

FIG. 7 is a schematic perspective view of a robot;

FIG. 8 is a schematic view of the operation principle of the open/close cylinder of the manipulator driving the mechanical fingers to grip and release;

fig. 9 is a schematic structural view of the mechanical finger in a grasping state.

FIG. 10 is a schematic diagram of the electrical control system for detecting and processing foreign fibers;

FIG. 11 is a schematic view of a pneumatic suction structure of the foreign fiber removing device;

FIG. 12 is a schematic view of an installation structure among the air suction pipe, the different fiber suction nozzle and the pneumatic valve;

in the figure, 1-the cotton-plucking fuselage body; 2-a cotton grabbing arm; 3-a foreign fiber detection device; 4-foreign fiber removing device; 5-a foreign fiber detection processing electric control system; 6-mounting the foreign fiber mechanism; 7-foreign fiber collecting bag; 31-a detection scaffold; 32-high precision camera; 33-lighting lamps; 34-shooting shade lamp; 41-a manipulator; 42-a linear module; 43-a servo motor; 44-a suction fan; 45-air suction pipe; 46-a foreign fiber suction nozzle; 47-pneumatic valves; 411-mechanical fingers; 412-a robot arm support; 413-manipulator open and close cylinder; 414-manipulator lifting cylinder; 415-mechanical finger mounting plate; 416-fixing the pin shaft; 417-moving the pin; 418-cylinder slide block; 51-image analysis and control unit; 52-PLC control unit.

[ detailed description ] embodiments

The present invention will be described in detail with reference to the accompanying drawings.

Example 1: an intelligent bale plucker with foreign fiber detection and removal functions is shown in fig. 1-10 and comprises a bale plucker body main body 1, a bale plucking arm 2, two groups of foreign fiber detection devices 3, two groups of foreign fiber removal devices 4, a foreign fiber detection processing electric control system 5, a foreign fiber mechanism mounting frame 6 and a foreign fiber collection bag 7, wherein the foreign fiber detection devices 3, the foreign fiber removal devices 4, the foreign fiber mechanism mounting frame 6 and the foreign fiber collection bag 7 are all mounted on the bale plucker arm 2; the foreign fiber detection device 3 comprises a detection bracket 31, a high-precision camera 32, an illuminating lamp 33 and a shooting shading lampshade 34, wherein the high-precision camera 32, the illuminating lamp 33 and the shooting shading lampshade 34 are arranged on the detection bracket 31, and the detection bracket 31 is arranged on the foreign fiber mechanism mounting frame 6; the foreign fiber removing device 4 is a mechanical arm grabbing and removing structure, the mechanical arm grabbing and removing structure comprises a mechanical arm 41, a linear module 42 and a servo motor 43, the mechanical arm 41 is installed on a sliding block of the linear module 42, the servo motor 43 is installed at the end part of the linear module 42, the sliding block in the linear module 42 drives the mechanical arm 41 to move linearly by controlling the transmission of a screw rod in the linear module 42, the mechanical arm 41 comprises a mechanical finger 411, a mechanical arm bracket 412, a mechanical arm opening and closing cylinder 413, a mechanical arm lifting cylinder 414, a mechanical finger mounting disc 415, a fixed pin 416 and a movable pin 417, the root part of the mechanical finger 411 is connected to the mechanical finger mounting disc 415 through the movable pin 417, the mechanical finger 411 drives the movable pin 417 to slide in a sliding groove of the mechanical finger mounting disc 415, and the joint of the mechanical finger 411 is connected to the mechanical arm, the mechanical finger 411 can rotate around a fixed pin 416, a mechanical hand opening and closing cylinder 413 is fixed on a mechanical hand support 412, a cylinder rod is fixed with the mechanical finger mounting plate 415, and the opening and closing of the mechanical finger 411 can be realized through the telescopic action of the cylinder rod; the grabbing action of the target foreign fiber object is realized; the manipulator lifting cylinder 414 is fixed on the slide block of the linear module 42, and the manipulator 41 moves along with the slide block on the linear module 42 to realize longitudinal linear movement along the cotton grabbing arm 2; the manipulator bracket 412 is fixed on the cylinder slide block 418 of the manipulator lifting cylinder 414, and the cylinder slide block 418 drives the mechanical finger 411 to move up and down, so that the manipulator 41 can accurately move to the longitudinal position of the foreign fiber object on the cotton picking arm 2, and the mechanical finger 411 of the manipulator 41 is aligned to the foreign fiber object;

the foreign fiber detection processing electric control system 5 comprises an image analysis and control unit 51 and a PLC control unit 52, the foreign fiber detection device 3 images the foreign fibers of cotton, generated pictures are recorded into the image analysis and control unit 51, the image analysis and control unit 51 is integrated by an industrial personal computer, AI calculation is carried out on the images acquired by the foreign fiber detection device 3 in real time, the foreign fibers are analyzed and identified, the coordinates of the foreign fibers are calculated, the PLC control unit 52 reads the coordinates of the foreign fibers, after reading, a grabbing command is sent to the foreign fiber clearing device 4, and the foreign fiber clearing device 4 grabs and collects the foreign fibers.

In the working process of the cotton grabbing machine, the foreign fiber detection device 3 shoots and images the upper surface of the cotton bale in real time, the foreign fiber detection and processing electronic control system 5 judges whether foreign fibers exist or not according to imaging data and determines the positions of the foreign fibers, the foreign fiber detection and processing electronic control system 5 sends execution signals to the foreign fiber removing device 4 next, and finally the foreign fibers are collected by the foreign fiber removing device 4 and are placed into the foreign fiber collecting bag 7.

Example 2: the difference from the embodiment 1 lies in the structure of the foreign fiber removing device 4, in this example, the foreign fiber removing device 4 is a pneumatic suction structure, as shown in fig. 11 and 12, it includes a suction fan 44, a suction pipe 45, a foreign fiber suction nozzle 46, a pneumatic valve 47 and a foreign fiber collecting bag 48, the foreign fiber suction nozzle 46 and the pneumatic valve 47 are connected in series and then communicated with the suction pipe 45, and the suction fan 44 is in a normally open state.

The foreign fiber detection processing electric control system 5 calculates the foreign fiber position, the pneumatic valve 47 at the corresponding position of the foreign fiber is opened, the foreign fiber is sucked into the suction pipe 45 by the foreign fiber suction nozzle 46, and finally the foreign fiber is sucked into the foreign fiber collection bag 7.

It should be noted that, due to the particularity of the operation of the reciprocating plucker, the foreign fiber detecting device 3 and the foreign fiber removing device 4 are arranged in two groups.

Two groups of different fiber detection devices 3 and different fiber clearing devices 4 are respectively arranged at two sides of the cotton grabbing arm 2, when the cotton grabbing machine reciprocates, the two groups of different fiber detection devices 3 and different fiber clearing devices 4 work intermittently, when the cotton grabbing machine moves towards the A direction, the first group of different fiber detection devices 3 and different fiber clearing devices 4 are in a working state, and when the cotton grabbing machine moves towards the B direction, the second group of different fiber detection devices 3 and different fiber clearing devices 4 are in a working state. Similarly, when the cotton grabbing arm rotates 180 degrees along with the turret, the cotton grabbing machine moves towards the direction A, the second group of different fiber detection devices 3 and the different fiber clearing devices 4 are in a working state, and when the cotton grabbing machine moves towards the direction B, the first group of different fiber detection devices 3 and the different fiber clearing devices 4 are in a working state.

The intelligent cotton grabbing machine with the foreign fiber detection and removal function can detect and remove foreign fibers from the initial stage of cotton spinning production, the detection rate of the visible foreign fibers on cotton bales is up to more than 99%, the production efficiency of subsequent processes is greatly improved, the requirement on manual labor is reduced, the content of the foreign fibers is reduced, and the purpose of improving the product quality is finally achieved.

The utility model discloses an embodiment is many, and different fine detection device 3 and different fine clearing device 4's structure has the structural scheme that functions such as many were substituted in addition, and the all such functional schemes under the technical scheme teaching of the utility model all belong to the utility model discloses a protection scope.

Claims (5)

1. The utility model provides an intelligence plucker with function is visited to different fibre which characterized by: the special fiber detection device comprises a cotton grabbing machine body main body (1), a cotton grabbing arm (2), two groups of special fiber detection devices (3), two groups of special fiber removing devices (4), a special fiber detection processing electric control system (5), a special fiber mechanism mounting frame (6) and a special fiber collecting bag (7), wherein the special fiber detection devices (3), the special fiber removing devices (4), the special fiber mechanism mounting frame (6) and the special fiber collecting bag (7) are all arranged on the cotton grabbing arm (2); the foreign fiber detection device (3) comprises a detection support (31), a high-precision camera (32), an illuminating lamp (33) and a shooting shading lampshade (34), wherein the high-precision camera (32), the illuminating lamp (33) and the shooting shading lampshade (34) are arranged on the detection support (31), and the detection support (31) is arranged on the foreign fiber mechanism mounting frame (6); the foreign fiber removing device (4) is a manipulator grabbing and removing structure or a pneumatic sucking and removing structure; the foreign fiber detection processing electric control system (5) comprises an image analysis and control unit (51) and a PLC control unit (52), foreign fibers of cotton are imaged by the foreign fiber detection device (3), generated pictures are recorded into the image analysis and control unit (51), the image analysis and control unit (51) is integrated by an industrial personal computer, AI calculation is carried out on images acquired by the foreign fiber detection device (3) in real time, foreign fibers are analyzed and identified, coordinates of the foreign fibers are calculated, the foreign fiber coordinates are read by the PLC control unit (52), after reading, a grabbing command is sent to the foreign fiber removal device (4), and the foreign fiber removal device (4) grabs and collects the foreign fibers.

2. The intelligent bale plucker with the foreign fiber detection function as claimed in claim 1, wherein: different fine clearing device (4) snatch the clearance structure for the manipulator, the manipulator snatchs the clearance structure and includes manipulator (41), sharp module (42) and servo motor (43), and install on the slider of sharp module (42) manipulator (41), and servo motor (43) are installed at sharp module (42) tip, through the screw drive of control sharp module (42) inside, drive manipulator (41) by the slider in sharp module (42) and realize rectilinear movement.

3. The intelligent bale plucker with the foreign fiber detection function as claimed in claim 2, wherein: the manipulator (41) comprises a mechanical finger (411), a manipulator support (412), a manipulator opening and closing cylinder (413), a manipulator lifting cylinder (414), a mechanical finger mounting disc (415), a fixed pin shaft (416) and a movable pin shaft (417), the root of the mechanical finger (411) is connected to a mechanical finger mounting disc (415) through a movable pin shaft (417), the mechanical finger (411) is provided with the movable pin shaft (417) and slides in a sliding groove of the mechanical finger mounting disc (415), a joint of the mechanical finger (411) is connected to a mechanical arm support (412) through a fixed pin shaft (416), the mechanical finger (411) can rotate around the fixed pin shaft (416), a mechanical arm opening and closing cylinder (413) is fixed to the mechanical arm support (412), a cylinder rod is fixed to the mechanical finger mounting disc (415), and opening and closing of the mechanical finger (411) can be achieved through telescopic action of the cylinder rod; the grabbing action of the target foreign fiber object is realized; the manipulator lifting cylinder (414) is fixed on the sliding block of the linear module (42), and the manipulator (41) moves along with the sliding block on the linear module (42) to realize longitudinal linear movement along the cotton grabbing arm (2); the manipulator support (412) is fixed on a cylinder sliding block (418) of a manipulator lifting cylinder (414), a mechanical finger (411) is driven to move up and down through the cylinder sliding block (418), the manipulator (41) can accurately move to the longitudinal position of the foreign fiber object on the cotton grabbing arm (2) under the control of the foreign fiber detection and processing electric control system (5), and the mechanical finger (411) of the manipulator (41) is aligned to the foreign fiber object; in the working process of the cotton grabbing machine, the foreign fiber detection device (3) shoots and images the upper surface of the cotton bale in real time, the foreign fiber detection processing electric control system (5) judges whether foreign fibers exist or not according to imaging data, determines the positions of the foreign fibers, sends execution signals to the foreign fiber removing device (4) through the foreign fiber detection processing electric control system (5), finally collects the foreign fibers through the foreign fiber removing device (4), and puts the foreign fiber collecting bag (7).

4. The intelligent bale plucker with the foreign fiber detection function as claimed in claim 1, wherein: different fine clearing device (4) are pnematic suction structure, contain suction fan (44), aspiration channel (45), different fine suction nozzle (46) and pneumatic valve (47) communicate with each other with aspiration channel (45) after establishing ties, suction fan (44) are in normally open state, different fine position of calculating out is handled electrical system (5) to different fine detection, pneumatic valve (47) of different fine corresponding position are opened, different fine is inhaled aspiration channel (45) by different fine suction nozzle (46), finally inhale different fine collection bag (7).

5. The intelligent bale plucker with the foreign fiber detection function as claimed in claim 1, wherein: the special fiber detection device (3) and the special fiber clearing device (4) are arranged on two sides of the cotton grabbing arm (2), when the cotton grabbing machine moves in a reciprocating mode, the two groups of special fiber detection devices (3) and the special fiber clearing device (4) work intermittently, when the cotton grabbing machine moves in the direction A, the first group of special fiber detection devices (3) and the special fiber clearing device (4) are in a working state, when the cotton grabbing machine moves in the direction B, the second group of special fiber detection devices (3) and the special fiber clearing device (4) are in a working state, similarly, when the cotton grabbing arm rotates 180 degrees along with the rotating tower, when the cotton grabbing machine moves in the direction A, the second group of special fiber detection devices (3) and the special fiber clearing device (4) are in a working state, and when the cotton grabbing machine moves in the direction B, the first group of special fiber detection devices (3) and the special fiber clearing device (4) are in a working state.

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