JPH0217647B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for detecting colored objects in raw cotton during a spinning process.

(Prior art) In the spinning process, if colored materials such as colored rags, colored cotton, seeds, pieces of wood, and other impurities are mixed into the raw cotton, it will cause defective products. Removal of colored objects is an extremely important matter for quality control.

Therefore, the present applicants have developed a cotton collection section that collects the raw cotton during pneumatic transport, a conveyance section that converts the raw cotton collected in the cotton collection section into a thin continuous strip of cotton into a belt shape, and We have proposed an apparatus for detecting colored objects in raw cotton, which is equipped with a detection section for identifying colored objects mixed in the strip of raw cotton (see Japanese Patent Application No. 59-220780). In this conventional device, a continuous strip of raw cotton that is being moved downward by a feed roller is irradiated with a special light beam, and a color sensor (for example, a color television camera or a C/C/D camera) detects colored objects. It is configured as follows.

(Problems to be Solved by the Invention) The conventional device described above avoids the pneumatic conveyance path and inspects the strip-shaped raw cotton that is continuously moving while being pressed by a feed roller, so it is difficult to detect colored objects with high precision. There is a limit. Furthermore, there is a problem in that the detected colored object cannot be reliably collected.

(Means for Solving the Problems) The present invention takes the following measures to solve the above-mentioned conventional problems and to enable inspection of raw cotton during pneumatic transportation. That is, the features of the present invention are as follows:
A cotton collecting section that collects the raw cotton during pneumatic transportation, a conveying section that unravels and sends the raw cotton collected in the cotton collecting section, an ascending air conveying section that air conveys the loosened raw cotton from below to upward, and this rising The present invention is characterized in that it includes a detection unit disposed in the air conveyance unit that identifies colored objects mixed in raw cotton, and an opening/closing device that intermittently opens and closes the conveyance path of the ascending air conveyance unit.

(Function) According to the present invention, a cotton collecting section is provided in the conveyance path during pneumatic transport of opened raw cotton to the mixing and batting machine process,
Colored raw cotton, which is being pneumatically transported at a speed of approximately 12 to 15 m/sec, is collected. The collected raw cotton is sent out as finely loosened cotton by a plurality of delivery rollers and opening rollers, and is guided to an ascending air conveyance path. This loose raw cotton is momentarily stopped along with the air flow because the ascending conveyance path is intermittently and instantaneously closed by the opening/closing device, and in the stopped state, the color of the raw cotton is identified by the detection unit and colored objects are detected. . Due to the difference in the color of the raw cotton, it is possible to detect all colored objects, whether they are the same or different.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

In the third drawing, 1 is a cotton opening machine, 2 is a mixed batting machine, and both machines are connected by a pneumatic transport duct 3. A colored object detection device 4 according to the present invention is interposed in the middle of this air transport duct 3. 5 is a blower device such as a blower or a fan condenser, and 6 is a colored object collection device, which is connected to the air transport duct 3 via a switching damper 7.

Details of the colored object detection device 4 are shown in FIGS. 1 and 2.

In the figure, a colored object detection device 4, a blower device 5,
The colored object collection device 6 and the switching damper 7 are housed in a closed frame 8. An inlet duct 3a for the opened raw cotton is connected to the upper right side, and an outlet duct 3b for the raw cotton from which colored matter has been removed is connected to the upper left side.

Inside the frame 8, a cotton collecting section 9 communicating with the inlet duct 3a is provided near the inlet duct 3a,
A conveyance section 10 is provided below the cotton collecting section 9 in a hanging shape. A rising air conveying section 11 is located parallel to this conveying section 10 and on the outlet duct 3b side, and conveys the loosened loose raw cotton from below to above.
is erected, and the lower end of the conveying section 10 is connected to the upper opening 12 on the inlet side of the upstream duct 3d of the ascending air conveying section 11.

In the cotton collection section 9, there are air ducts 3c, 3c, which allow the air flow that has passed through this to flow to the inlet end 13 of the upstream duct 3d of the ascending air conveyance section 11 without passing through the conveyance section 10. They are located inside the front and back.

A damper 14 that intermittently opens and closes this conveyance path is connected to the upper end of the rising air conveyance section 11, and the other inlet 15 of this damper 14 has an upper end connected to the upper end of the air ducts 3c, 3c. An air bypass duct 3e is connected thereto.

The outlet of the damper 14 is connected to an air transport duct 3f whose other end is connected to the inlet of the blower 5.

The upstream end of the outlet duct 3b is connected to the outlet of the blower 5, and a colored material discharge opening 16 for discharging colored material is provided in the middle of the outlet duct 3b.

This colored matter discharge opening 16 is provided with a flow path switching damper 7, and is connected to a colored matter discharge duct 17 whose other end is connected to the colored matter recovery device 6.

The cotton collecting section 9 is provided with a casing 18 connected to the upper part of the conveying section 10, and a rotating cage 19 is provided within the casing 18.
This rotation cage 19 is formed from a cylindrical mesh and has four
It is fixed to a horizontal rotating shaft 20 perpendicular to the raw cotton inflow direction via a book rib 19a, and air vents 21 communicating with the air ducts 3c, 3c are provided on both the front and rear sides thereof. . A pulley 22 is fixed to one shaft end of the horizontal rotation shaft 20,
This pulley 22 is driven by a motor (not shown) via a belt or the like. A drum-shaped rotary scraper 23 for scraping off the raw cotton layer adsorbed on the outer peripheral surface of the rotary cage 19 is installed on the lower side of the rotary cage 19 via a rotary shaft 24 parallel to the horizontal rotary shaft 20. It is provided. A pulley 25 is fixed to one end of the rotating shaft 24, and the pulley 25 is driven by a motor (not shown) via a belt or the like.

The casing 18 is curved along the outer circumferential surface of the casing 18 with a distance between the lower side of the rotation cage 19 and the lower edge of the inlet duct 3a so as not to suck air from the lower edge of the inlet duct 3a. It is called a plate 18a. Therefore, the raw cotton layer scraped off by the rotary scraper 23 is
The cotton becomes loose and is fed to the conveying section 10 in a hanging manner.

A plurality of feed rollers 26 are provided at the lower part of the conveyance section 10 to scrape out the fallen raw cotton in the form of loose pieces while making it uniform. The feeding rollers 26 are fixed to parallel horizontal rotating shafts 27 so as to maintain a predetermined distance from each other, and these are forcibly driven in conjunction with a motor (not shown). . Immediately below this feeding roller 26, a fiber opening roller 28 for loosening the scraped raw cotton and sending it out to the upstream duct 3d is provided via a shaft 29 parallel to the horizontal rotating shaft 27, and is driven by a motor. (not shown).

In order to improve inspection accuracy, the rising air conveying section 11 has a narrower left and right interval than other ducts and a wider front and back width, and both sides (the left and right sides in FIG. 1) are connected to the detection sections 30, 30. The color of the raw cotton passing through this area is identified and the presence or absence of colored substances is detected. That is, both sides of the rising air conveying section 11 are used as colored object observation windows, and on the right side, the upper part from the center in the vertical direction is made of transparent glass 31, and the lower part is made of ground glass 32, and conversely, on the left side, the upper part is made of ground glass. 32, the lower part is made of transparent glass 31.

Special fluorescent lamps 33, 33 are provided on both left and right sides of the vertical center of the observation window. This special fluorescent lamp 33 may be replaced by any other lighting device as long as it does not cast a shadow on the surface of the raw cotton. Further, a plurality of color sensors 34, 34 are provided on each of the left and right sides, facing the transparent glasses 31, 31 of the observation windows. The color sensors 34, 34 are composed of cameras and the like.

The rotary shaft 35 to which the opening/closing plate 14a of the damper 14 is fixed is forcibly driven by an obvious driving means so as to reciprocate intermittently.

Further, the rotating shaft 36 of the switching damper 7 is forcibly driven by an obvious driving means, and the driving is performed each time at a predetermined timing based on the colored object detection signal of the color sensor 34.

According to an embodiment of the invention, as shown in the drawings,
The raw cotton opened by the cotton opening machine 1 is transferred to the pneumatic transport duct 3.
While being pneumatically transported to the mixing and batting machine 2, the mixed colored matter is detected by the colored matter detection device 4 according to the present invention. When a colored material is detected by the colored material detection device 4, the switching damper 7 switches the transportation route in synchronization with the time when the colored material-containing raw cotton passes through the switching damper 7, and the colored material-containing raw cotton is transferred to a recovery device. It will be collected on 6th.

The raw cotton introduced into the cotton collecting section 9 from the inlet duct 3a is adsorbed by the rotating cage 19, and then scraped off by the rotating scraper 23, falling in the shape of a piece of grass, and collected at the lower part of the conveying section 10. The fibers are scraped downward while being uniformized by the feed roller 26, loosened by the opening roller 29, and sent from the opening 12 to the duct 3d. The raw cotton sent to this duct 3d is guided by the air to the ascending air conveying section 11 whose width is narrowed from side to side, and is momentarily stopped by the intermittent opening and closing movement of the damper 14. In this stopped state, the raw cotton is It is inspected by sensor 34. Therefore, according to the color sensor 34, even if the colored material is the same or different from the raw cotton, if it is mixed in, there will be a part that is different in color from other parts, so this part is not mixed with the colored material. It can be detected as a part. Furthermore, even at the moment when the upper end of the ascending air conveying section 11 is blocked by the damper 14, the air that has passed through the rotating cage 19 is sucked by the blower device 5 through the air bypass duct 3e, so that the air that has passed through the rotating cage 19 is sucked into the rotating cage 19. Cotton collection can be carried out continuously without hindrance to raw cotton adsorption.

In this way, the detected colored parts are
The switching damper 7 switches the transportation route in synchronization with the time when this portion passes through the switching damper 7, so that the portion is sent to the collection device 6 through the duct 17.

In the embodiment of the present invention, the raw cotton scraped into a thin layer by the cotton collection section 9 is made uniform by the feeding roller 26, and then loosened into pieces and sent to the detection section 30, where it is identified in a stopped state. So,
Detection errors in which colored objects enter the raw cotton layer and are not detected can be prevented, and inspection accuracy can be improved.

Furthermore, since the air duct 3c and the air bypass duct 3e are provided and the air flow path is intermittently switched by the damper 14, it is only necessary to provide one blower device 5 in the air transport path.
It can be an economical device.

It should be noted that the present invention is not limited to the above embodiment, and the colored object inspection device may be provided in the middle of the air transport duct behind the cotton mixing machine. Further, the cotton collecting section is not limited to one that collects cotton using a rotating cage, but may be one that collects cotton on a fine conveyor, for example. Further, the detection section may be provided with another sensor in place of the color sensor, and furthermore, a magnetic sensor may be provided in parallel in addition to the color sensor.

In addition, cooling air for the wiper can be flowed to the inner surface of each glass of the detection unit to prevent cotton dust from adhering to the glass.

(Effects of the Invention) According to the present invention, since the loose raw cotton that is brought to an instantaneous stop state in the ascending air conveyance section is inspected, the detection of colored substances mixed in the raw cotton is performed reliably and accurately, and the detected Colored items can be collected reliably and generation of defective items can be prevented.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention, FIG. 2 is a right side view of the same, and FIG. 3 is an overall layout diagram. 3... Air transport duct, 4... Colored object detection device, 5...
Air blower, 9... Cotton collecting section, 10... Conveying section, 11... Rising air conveying section, 14... Opening/closing device (damper), 3
0...detection section.

Claims (1)

[Claims] 1. A cotton collecting section that collects raw cotton during pneumatic transportation, a conveying section that unravels and sends the raw cotton collected in the cotton collecting section, an ascending air conveying section that air conveys the loosened raw cotton from below to upward, and Colors in raw cotton, characterized by comprising a detection unit disposed in an ascending air conveyance section that identifies colored substances mixed in the raw cotton, and an opening/closing device that intermittently opens and closes a conveyance path of the ascending air conveyance section. Object detection device.