JPS5827831Y2 - grain sorting machine - Google Patents

Description

[Detailed explanation of the invention] Harvested grains such as rice and wheat contain foreign substances such as large and small branches, stems, and culms in addition to grains, so they are carefully selected. To obtain grain, the mixture must be screened out.

Since these mixtures vary in shape and size, it is difficult to separate the mixtures using only one type of sorter.

The present invention is a rotary cylindrical sieve that is effective for removing large foreign substances such as large pieces of branches and stems from the above-mentioned mixture, and a rotating cylindrical sieve that is effective for removing small foreign substances and obtaining grains with good purity. To provide a grain sorting machine that performs effective grain sorting by combining an efficient flat section type vibrating sieve.

The present invention will be explained below with reference to the drawings.

Frame a shows a frame that forms the body of the grain sorting machine of the present invention, and frame a is a rectangular upper frame 2 placed above a rectangular lower frame 1, which is attached to the lower frame 1 by several supports. It is formed by being connected by 3.

b shows a cylindrical sieving machine installed on the upper frame 1 of frame a, 4 is the machine casing, and a shaft 5 is passed through the middle part of both side walls of the machine casing 4, and its both ends are connected to the machine casing 4. It is rotatably supported by bearings 6, 6 attached to the outer surfaces of both side walls, and the center part of a disk 7.7 is fixed to the shaft 5 in close proximity to the inner surface of both side walls of the machine housing 4. Both ends of the wire mesh cylinder 8 are supported on the peripheral edges of the wire mesh cylinders 7, 7.

The wire mesh cylinder 8 is made of a wire mesh having a wide mesh through which grains can easily pass, and large foreign objects such as branch stalks and stem culms cannot pass through.

Reference numeral 9 denotes a number of guide plates provided inside the wire mesh cylinder 8 to prevent the grains flowing inside the wire mesh cylinder 8 from flying out forward, each of which is supported at both ends by the disks 7 on both sides.

Reference numeral 10 denotes a rotating brush for removing the above-mentioned large foreign matter caught on the outer peripheral surface of the wire mesh cylinder 8; It is rotatably supported.

12 is a reduction motor mounted on the upper part 2 of frame a at the rear of the machine housing 4, and a small boot 'J-13' is attached to the drive shaft.
．． Drive belt 14. The shaft 5 is image-rotated via a large pulley 15, and a belt 18 is passed between another large pulley 16 attached to the shaft 5 and a small pulley 17 on the shaft 11 of the rotating brush 10.

Reference numeral 19 denotes a feed port for grains to be sorted provided at the upper part of the machine case 4, and the lower end opening thereof is arranged so as to face a swash plate provided on the inner surface of the rear wall of the machine case 4 in close proximity to the wire mesh cylinder 8. 4 are provided with outlet ports 20 and 21 respectively for the grains falling through the opening of the wire mesh cylinder 8 and the large foreign matter group sieved by the wire mesh cylinder 8 and peeled off by the rotating brush 10. .

C shows a vibrating sieve machine installed in the space between the lower frame 1 and the upper frame 2 of frame A, and 22 is a rectangular sieve box that constitutes the vibrating sieve machine. The spring support 23 is fixed with the front support placed lower than the rear support, and the spring mounting metal 24 is placed on the lower frame 1 of the flange a at a position close to the front, rear, left, and right corners. The front mounting bracket is placed at a lower level than the rear mounting bracket, and the spring 25 is fixed vertically to the spring mounting bracket 24.
5 supports spring supports 23 provided on the sieve box 22, and supports the rectangular sieve box 22 in an inclined direction from the material supply port to the discharge port.

A wire mesh cylinder 8 of a cylindrical sieve separation machine is mounted on the clay wall of the rectangular sieve box 22.
A supply port 26 for the grain group to fall through the mesh of the cylindrical sieve, and a drain trough 27 for the large foreign matter group to fall to the discharge port 21 from the outer peripheral surface of the wire mesh cylinder 8 of the cylindrical sieving machine. The lower end of the supply port 26 and the upper end of the supply port 26 are connected by a telescopic introduction tube 28, and the lower end of the discharge port 21 and the upper end of the drain trough 27 are connected by a telescopic introduction tube 29.

Inside the sieve box 22, a sieve screen 30 having a mesh that allows grains to pass through but does not allow small foreign objects such as stem culms larger than the grains to pass is stretched so as to be tilted forward. is sieve screen 30
A discharge port 31 for the selected grains passing through the mesh is provided, and a foreign matter discharge pipe 32 is bent at the lower end of the large foreign matter drain trough 27, and a mesh of a sieve screen 30 is provided on the inner wall of the discharge pipe 32. An opening 33 is provided for allowing small foreign substances that cannot pass through and remain on the sieve screen 30 to flow into the discharge tube 32.

In addition, a main shaft 34 passes through both side plates of the sieve box 22 near the center of gravity and is rotatably supported on bearings provided on both side plates, and eccentric weights 35 are attached to the protruding parts at both ends of the main shaft 34. A prime mover 36 is mounted on the rear part of the lower frame 1 of the frame a, and a belt 39 is passed between a small pulley 37 of the driving shaft and a large pulley 38 attached to the main shaft 34.

Therefore, when the prime mover 36 is operated and its power is transmitted to the main shaft 34, the sieve box 22 is affected by the unbalanced load caused by the eccentric weight 35.
oscillates in a vertical plane with a small swing width, and the radius of gyration of this oscillating motion is W, the weight of the entire oscillating body, W, the weight of the eccentric weight, W, and the axial center of the center of gravity of the eccentric weight. If the distance between the twists is R, the swinging radius r of the sieve box 22 can be obtained as follows.

In other words, since the weight of the W weight is small relative to the weight of the sieve box 22 and the entire object mounted thereon, the swing radius r is small.

By speeding up the rotation of this rotating main shaft 34, the sieve box 22
makes an oscillating motion with a small amplitude and high frequency.

Next, the functions and effects of the present invention will be explained.

The deceleration motor 12 is operated to transmit its power to the shaft 5 and to the central shaft 11 of the rotating brush 10, thereby rotating the wire mesh cylinder 8 in the direction of the arrow in FIG. 3 and rotating the rotating brush 10 in the direction of the arrow in FIG. The main motor 36 is operated to transmit the power to the rotating main shaft 34, and the eccentric weight 35 causes the sieve box 22 to perform an oscillating motion with a small amplitude and high frequency.

Therefore, when the grain raw material containing foreign substances such as large and small branches and stalks and stems is dropped from the supply port 19 onto the wire mesh cylinder 8 that has been put into the machine case 4, the grains fall through the mesh of the wire mesh and into the discharge port 20. After passing through the introduction tube 28, the grains fall from the grain group supply port 26 of the vibrating sieve machine C to the rear of the sieve screen 30 stretched inside the sieve box 22, and large foreign substances such as branch stalks and stem culms are removed from the outer periphery of the wire mesh cylinder 8. The remaining particles on the top move forward as the wire mesh cylinder 8 rotates, are peeled off from the wire mesh surface by the rotating brush 10, and are sent from the discharge port 21 through the introduction tube 29 to the drain trough 27 provided on the upper wall of the sieve box 22 of the vibrating sieve machine C. Inserted, sink gutter 2
7 vibrates together with the sieve box 22, and large foreign substances are automatically transferred to the lower end of the drain trough 27.

The grain cluster that has fallen onto the sieve screen 30 of the vibrating sieve machine C is caused by the small-width, high-frequency rocking motion of the sieve box 22 to remove small foreign objects such as twig stalks and stem culms that are larger than the grains and mixed in the grain cluster. is separated from the grains, and the small foreign matter remains on the sieve screen 30, flows over the sieve screen 30, is sent into the foreign matter discharge tube 32 through the opening 33, and merges with the large foreign matter flowing in from the sink trough 27, and the foreign matter is removed. The selected grains that are discharged from the discharge tube 32 and fall through the mesh of the sieve screen 30 are taken out from the discharge port 31, and in this way, grains containing foreign substances such as large and small branches, stems, and culms are removed. Separation of foreign substances and selection of grains are carried out.

The difficult points in the sieving and classification of grains are the large branches and stalks and culms that get caught in the mesh during sieving and remain on the screen, obstructing the sieving action.

Therefore, in general grain sorting sieves, in order to improve the flow of branches, stems, and culms, methods are used in which the sieve screen is swung at a large swing width or the screen is made to have a strong slope. It is inefficient and requires a large screen area relative to the amount of processing.

When carefully selecting grain raw materials to be sorted, this invention first uses a mesh cylindrical rotating sieve to remove large foreign substances such as branch stalks and stem culms that are mixed in the raw materials, thereby allowing the large foreign substances to remain on the screen. This eliminates the cause of the problem, and makes it possible to use a vibrating sieve machine with a small vibrating screen that rotates in the plane of the screen, which is the most effective method for sieving grains. Since it performs a vertical rotation movement with a small amplitude and a high rotational speed, grain groups on the net do not jump around a lot, and individual grains move on the net while being reversely shaken, improving the fibrillation rate. .

In this way, by combining the rotating cylindrical sieve for large foreign matter removal with the vibrating sieve that is effective for grain sorting, the sieving effect is much better than other conventional reciprocating oscillating sieves. Furthermore, the external dimensions of the machine are small and it can be placed in a narrow space.

In addition, the present invention introduces the large foreign matter removed from the outer periphery of the wire mesh cylinder by the cylindrical sieving machine into a drain installed in the vibrating sieve machine and allows it to fall naturally due to vibration, and also removes the small foreign matter separated by the sieve screen of the vibrating sieve machine. Since the large foreign matter is combined with the large foreign matter and then discharged, the discharge process of these foreign matter becomes easy.

Furthermore, by integrating the cylindrical sieve and the vibrating sieve and sealing them, it is possible to prevent material leakage and generation of dust outside the machine.

In addition, the sieve screen of the vibrating sieve machine is set up in two stages, upper and lower, and the mesh of the upper sieve is formed so that grains can pass through, but foreign matter larger than the grains cannot pass through. The mesh of the lower sieve screen is formed so that the grains do not pass through, and the lower sieve screen separates and removes fine powder, small dust, etc. This can be taken out from the selected grain outlet, leaving behind some grains.

[Brief explanation of the drawing]

Fig. 1 is a side view of a grain sorting machine according to the present invention, Fig. 2 is a front view, Fig. 3 is a longitudinal sectional view, and Fig. 4 is a sectional view of a cylindrical sieving machine. a...Frame, 1...Bottom frame, 2...
... Upper frame, 3 ... Support, b ... Cylindrical sieve sorter, 4 ... Machine casing, 5 ... Shaft, 7
...Disc, 8...Wire mesh cylinder, 10...
... Rotating brush, 19 ... Supply port, 20.
... Grain group discharge port, 21 ... Large foreign matter discharge port, C ... Vibration sieve machine, 22 ... Sieve box,
23...Spring support, 24...Spring attachment, 25...Spring, 26...Grain group supply port, 27... ...Large foreign matter in the drain, 28.2
9... Telescopic introduction tube, 30... Sieve screen, 31... Selected grain outlet, 32...
・・Foreign matter discharge pipe, 33 ・・Opening, 34 ・・
...Rotating main shaft, 35...Eccentric weight.

Claims (1)

[Scope of utility model registration request] A machine housing 4 for a cylindrical sieving machine is installed on the upper frame 2 of a frame A, which is formed by installing a rectangular upper frame 2 above a rectangular lower frame 1 via a support 3, and inside the machine housing 4, A wire mesh cylinder 8, which is covered with a wire mesh having a mesh through which grains can pass but which large foreign objects such as bony cobs cannot pass through, is horizontally supported and driven to rotate, and is located at the bottom of the machine casing 4. is provided with a grain group outlet 20 and a large foreign matter outlet 21, and a lower frame 1 and an upper frame 2 of the frame a.
A rectangular sieve box 22 constituting the vibrating sieve machine C is placed in the space between
is supported by springs 25 at positions close to its front, rear, left, and right corners, and inclined from the material supply port to the discharge port, and the sieve box 22 has a rotating main shaft 34 on both side plates located near the center of gravity of the sieve box 22. An eccentric weight 35 is attached to both ends of the main shaft 34.
A wire mesh 30 is installed inside the sieve box 22, which has a mesh that allows grains to pass through but does not allow small foreign objects larger than the grains to pass through. 26 and a large foreign matter drain trough 27 are provided, and are connected to the grain group outlet 20 and the large foreign matter outlet 21 of the cylindrical sieve, respectively, by telescopic introduction tubes 28 and 29, and are connected to the bottom of the sieve box 22. This grain sorting machine is characterized in that a discharge port 31 for carefully selected grains is provided for discharging a large amount of foreign matter, and a foreign matter discharge port 32 is bent at the lower end of the gutter 27.