JPS644465Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an improvement of the light receiving device of a color sorter that sorts particles mixed with different colors into regular particles and different color particles.
Specifically, the present invention relates to a technique for arranging a head amplifier connected to a light receiving element in close proximity to prevent electrical noise.

[Prior art and its problems]

In general, in a grain color sorter, grains containing different colors flow out from the lower end of the downflow gutter into a downflow trajectory, and a light source, background, and
The grains are illuminated by a light source using a light receiving element, the amount of reflected light or the amount of transmitted light is detected by the light receiving element, and the ejector, which is activated by the output signal of the light receiving element that detects the different colored particles, removes the particles from the falling trajectory. It is designed to screen out and remove different colored particles.

By the way, there is a limit to the detection ability of the light-receiving element or the operating ability of the ejector for the amount of grain mixed with different colors flowing down the flow path, so depending on the desired grain sorting throughput, the flow gutter, A light-receiving element and an ejector are arranged in parallel in a plurality of rows, and one example of this is known in Japanese Patent Publication No. 54-25265.

If the head amplifier that communicates the detection signal of the light receiving element input through the light receiving lens barrel is placed far away, it will generate electrical noise in addition to the detection signal of the light receiving element, causing the ejector to malfunction, and discontinuing the selection of unusual colors. This increases the amount of sorted particles mixed into the particles, causing a decrease in sorting yield or sorting ability. For this reason, it is necessary to place a head amplifier close to the light receiving element, but the conventional method of making the aircraft smaller is to arrange a plurality of head amplifiers in a multi-array configuration so that their ends are in contact with each other. It was considered the best device ever.

Further, for the purpose of reducing the gap between a plurality of head amplifiers, that is, the gap between the light-receiving lens barrels communicating with the light-receiving element, a technique has been proposed in Japanese Utility Model Application Publication No. 56-62183. In this device, a plurality of substrates each having a light receiving element and a head amplifier are arranged in a superimposed manner in the photoreceptor, and a plurality of light receiving tubes connected to the photoreceptor are individually connected to the above substrates. This has the effect of connecting the head amplifiers in close proximity and shortening the gap between the light receiving tubes, thereby making it possible to downsize the aircraft device. However, this device does not have a photoreceptor and multiple boards that can be attached and detached, and it is necessary to remove each board one by one to inspect and replace the individual photoreceptors and head amplifiers, which saves time and effort. A problem arose.

[Purpose of invention]

The present invention is an improvement made in view of the above points.In addition to arranging multiple light receiving elements and head amplifiers in close proximity to each other on the same board, multiple light receiving lens barrels are attached to the same lens barrel mounting plate. The substrate and the lens barrel mounting plate are removably formed into a light receiving element to prevent electrical noise and to shorten the gap between the head amplifier and the light receiving lens barrel. It is an object of the present invention to provide a light-receiving device for a color sorter that can simplify the work of inspecting or replacing a light-receiving lens barrel.

[Means for solving problems]

In order to achieve the above object, the present invention arranges a photoelectric device, a light receiving device, and an injection nozzle device in relation to each other around the falling locus of particles mixed with different colors flowing out from a downflow gutter, and In a color sorting machine in which a plurality of devices are arranged in parallel, a plurality of connected light receiving elements and head amplifiers are arranged in parallel on the same substrate, and a plurality of light receiving lens barrels communicating with the plurality of light receiving elements are arranged in parallel. A means for solving the problem has been taken by forming a light receiving device in such a manner that the substrate and the lens barrel mounting plate are attached to the same lens barrel mounting plate and are detachable.

[Example of idea]

An embodiment of the present invention will be explained with reference to FIGS. 1 to 4. Reference numeral 1 denotes a sorting machine frame, on which a plurality of vibrating grain feeding troughs 3 each having a vibrating device 2 are mounted, and a supply hopper 4 is installed on the supply side of each vibrating grain feeding trough 3.
and a plurality of grain flow paths are formed by connecting a flow gutter 5 to each discharge side thereof. A photoelectric sorting chamber 10 consisting of a photoelectric device 7 equipped with a reference color plate 6, a light receiving device 8, and an injection nozzle device 9 is connected to the lower end of the downflow gutter 5, and a falling trajectory of particles mixed with different color particles flowing down from the flowdown gutter 5 is connected. 11, the light source of the photoelectric device 7, the light receiving element of the light receiving device 8, and the reference color plate 6 are made to face each other in relation to each other. The injection nozzle 12 of the injection nozzle device 9 is fixedly installed so as to face the flow trajectory 11, and each light receiving device 8 and the injection nozzle device 9 are connected electrically to a control circuit 14 having a main amplifier 13. death,
A different color grain discharge port 15 is provided at the bottom of the photoelectric sorting chamber 10, and a grain collection cylinder 1 for particle conditioning is provided on the extension line of the flow trajectory 11.
6 is fixedly installed to discharge regular particles to the outside of the machine.

Next, the light receiving device 8 includes a plurality of light receiving elements 17...
A plurality of head amplifiers 18 are connected to each of the light-receiving elements 17, which are arranged in a horizontal line using The same number of light-receiving lens barrels 20 communicating with the elements 17 are attached to the same lens barrel mounting plate 21, and the substrate 19 and the lens barrel mounting plate 21 are removably joined to form the light-receiving device 8. The head amplifiers 18 are connected to the main amplifiers 13 of the control circuit 14, respectively, and the reference numeral 22 designates a photovoltaic chamber with a transparent wall in front, which houses the photovoltaic device 7, the light receiving device 8, and the like.

With the above-mentioned configuration, particles mixed with different color grains of the raw material flowing down from the supply hopper 4 to the vibrating grain feeding trough 3 flow down to the lower flow trough 5 by the vibration action of the vibrating grain feeding trough 3, and are photoelectronized. It flows out in the sorting chamber 10 in a flight shape along a predetermined flow trajectory 11. Sorting room 10
Inside, the amount of light reflected by the different color particles and the reference color plate 6
The light receiving element 17 detects the difference in the amount of light from the
In response to the detection signal, the injection nozzle 12 is actuated to emit a jet at a timely manner, and the jet action causes the different-colored particles to leave the falling trajectory 11, and the separated particles flow down from the different-colored particle outlet 15. Eliminated and again trajectory 1
The sorted particles flowing out along the line 1 are directly taken out of the machine via the particle sorting cylinder 16 and are entrusted to the next process.

The light receiving device 8 provided in the photoelectric chamber 22 has a plurality of light receiving elements 17 arranged in a horizontal line on a plate surface.
A plurality of head amplifiers 18 are connected to each of the light receiving elements 17, and the light receiving elements 17 are connected to each other.
and head amplifier 18... are placed close together on the same board 1.
The same number of light-receiving lens barrels 20 .
Since the substrate 19 and the lens barrel mounting plate 21 are removably connected, compared to conventional devices in which the substrate is housed in a fixing tube 23 that fixes the base of the light receiving lens tube. Since the intervals between the light receiving elements 17 can be arranged as close as possible, the arrangement interval of the multiple downflow troughs 5 can be reduced and the sorting machine frame 1 can be arranged as close as possible.
The width of the lens can be reduced as much as possible to make the entire device smaller, and the substrate 19 can be easily removed from the lens mounting plate 21 by arranging a plurality of light receiving elements 17 in parallel. It is possible to easily inspect and replace electrical components such as the light receiving element 17, head amplifier, etc., or the light receiving lens barrel 20, and the best sorting performance can be maintained at all times. Since it is attached, it has the effect of preventing electrical noise and improving sorting accuracy.

FIG. 5 shows a light receiving device according to the second embodiment, and exemplifies the case where it is installed in a dual-type downflow gutter 5 device. The base of the light-receiving lens barrel 20... is attached to the lens barrel mounting plate 21, and the head amplifier 18... is placed opposite to the light-receiving element 17.
The lens barrel mounting plate 21 is attached to the same substrate 19 as the lens barrel 19, and the substrate 19 and the lens barrel mounting plate 21 are detachably formed. The other configurations and operations are the same as those of the previous embodiment, so the details will be omitted.

[Effect of idea]

As mentioned above, the present invention has multiple light receiving elements and multiple head amplifiers arranged in close proximity on the same board, thereby preventing electrical noise and ensuring normal operation of the injection nozzle device. In addition to reducing the size of the aircraft by shortening the gaps between the flow gutter, head amplifier, and light-receiving lens tube, it also makes it easier to inspect or replace electrical components such as the light-receiving element, head amplifier, and light-receiving lens tube. It has the following effects:

[Brief explanation of the drawing]

The drawings are illustrations of embodiments of the present invention. Fig. 1 is a front view of the color sorter, Fig. 2 is a side sectional view thereof, Fig. 3 is an enlarged sectional view of the photoelectric sorting chamber, and Fig. 4 is a perspective view of the substrate and lens barrel mounting plate of the first embodiment. FIG. 5 is a perspective view of the second embodiment. 1... Sorting machine frame, 2... Vibrating device, 3... Vibrating grain feeder, 4... Supply hopper, 5... Downflow gutter, 6
... Reference color plate, 7 ... Photoelectric device, 8 ... Light receiving device, 9 ... Spray nozzle, 10 ... Photoelectric sorting chamber, 1
1...Downward trajectory, 12...Injection nozzle, 13...
Main amplifier, 14...Control circuit, 15...Unusual grain discharge port, 16...Grain collection cylinder for particle conditioning, 17...Light receiving element, 18...Head amplifier, 19...Substrate,
20... Light receiving lens tube, 21... Lens tube mounting plate, 22... Photoelectric chamber.

Claims (1)

[Scope of utility model registration request] A color sorter in which a photoelectric device, a light receiving device, and an injection nozzle device are respectively arranged in relation to each other around a falling locus of particles mixed with different colors flowing out from a downflow gutter, and in which the downflow gutter and each device are arranged in multiple rows, A plurality of communicating light receiving elements and head amplifiers are arranged in parallel on the same substrate, and a plurality of light receiving lens barrels communicating with the plurality of light receiving elements are mounted on the same lens barrel mounting plate, 1. A light receiving device for a color sorter, characterized in that the lens barrel mounting plate and the lens barrel mounting plate are formed on the light receiving device so as to be freely attachable and detachable.