JPS644733Y2 - - Google Patents

Description

[Detailed description of the invention] This invention continuously controls the amount of grain supplied to the grain harvesting box according to the rotational speed of the conveying screw shaft so that the conveying screw shaft always maintains a constant rotational speed. The present invention relates to a grain conveying device that can efficiently accomplish stable grain conveying work.

Conventionally, grains dried by a dryer are taken out from the dryer through a bucket-type elevator into a grain harvesting box, and then the dry grains are transported by a conveying screw shaft into a grain lifting drum, and then directly connected to the conveying screw shaft. A grain conveying device for transporting grain to a proper location outside the machine by the rotational flip-up action of the grain lifting blades is well known and was described in, for example, Japanese Utility Model Publication No. 48-3802 prior to this application.

By the way, in the grain conveying device as described above, since the grain supplied into the grain harvesting box is intermittently supplied by the bucket of the elevator, the amount of grain supplied is not always constant but fluctuates.

Therefore, even if the rotational speed of the conveying screw shaft is specified to be an appropriate constant rotational speed, if the amount of grain supplied into the grain harvesting box exceeds the specified amount, the resistance to the stacking pressure will increase. Due to this increase, the transmission belt causes a slip rotation phenomenon, and the rotation speed of the conveying screw shaft naturally becomes lower than the specified rotation speed, resulting in the disadvantage that the grain cannot be accurately hoisted by the grain hoist wheel.

Therefore, in order to solve the drawbacks of the above-mentioned known grain conveying devices, the present invention automatically controls the amount of grain supplied to the grain harvesting box so that the conveying screw shaft always maintains a constant rotation speed. The object of the present invention is to obtain a grain conveying device that can efficiently carry out stable grain conveying work over a long period of time.

In view of the above, and in order to achieve the above object, the present invention has a structure in which a centrifugal sliding device is installed at one end of a conveying screw shaft that extends horizontally through a grain lifting drum and a grain harvesting box that are arranged adjacent to each other in a communicating manner. The movable member of the centrifugal sliding device is equipped with one end of a movable rod having a shutter plate for adjusting the degree of opening of the grain inlet opened at the top of the grain harvesting box. According to this grain conveying device, the grain supplied into the grain harvesting box is conveyed from the grain harvesting room to a desired location via the grain lifting drum by the rotation action of the conveying screw shaft. During the process of forcing
If by chance more than the specified amount of grain is fed into the grain harvesting box, and the transmission belt slips due to the increased resistance of the piled pressure, and the rotation speed of the conveyance screw shaft becomes slower than the specified rotation speed, the conveyance The operation of the centrifugal sliding device installed on the screw shaft automatically slides the movable member toward the side where the grain inlet is closed, and the opening degree of the grain inlet is determined by the closing operation of the shutter plate. If the conveying screw shaft reaches the specified rotation speed through the above-mentioned operation, the centrifugal sliding device operates to automatically adjust the supply amount so that the specified rotation speed can be maintained. Slide the grain inlet to the side where the grain inlet is opened, and open the grain inlet to a large extent by operating the shutter plate to adjust the amount of grain so that the conveying screw shaft can maintain the specified rotation speed. Grain is automatically fed into the harvesting box, and the rotational speed of the conveying screw shaft is always maintained at a specified rotational speed, so that stable and efficient grain conveying work can be easily carried out.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A grain conveying device according to the present invention will be described below with reference to a preferred embodiment shown in the accompanying drawings.

In the drawing, 1 indicates the imported grain (for example,
It is a drying main body in which grains (paddy, wheat) are dried by being exposed to hot air as they flow down a drying passage of an appropriate width, and one side of the main dryer main body 1 is used to carry grains to be dried into the main dryer main body 1. Alternatively, an elevator 2 is attached to circulate and flow the grain to be dried within the dryer main body 1 many times, and furthermore, to transport the dried grain to a desired location outside the machine via a grain conveying device 3. ing. The grain conveying device 3 described above is attached to the elevator 2 at an appropriate height via a mounting member 4. Note that this grain conveying device 3 may be installed at a suitable location on the dryer main body 1 side.

As shown in FIG. 2, the grain conveying device 3 has a grain inlet 6 opened on the upper surface, and the grain inlet 6 is connected to a grain harvesting case 5 connected to the upper part of the elevator 2 via a supply gutter 7. A grain lifting drum 8 is integrally attached to the front side of the grain harvesting box 5 with the insides communicating with each other.
A conveying screw shaft 9 is horizontally suspended through the lower side of the grain collecting case 5 and the center of the grain lifting drum 8, and a conveying screw extending outside from the grain collecting case 5. A centrifugal sliding device 10 is attached to the shaft 9, and a driven pulley 11 is attached to the conveying screw shaft 9 extending outside from the grain lifting drum 8, so that the conveying screw shaft 9 is rotated at a specified rotational speed, for example.
Rotate at 1200rpm.

The above-mentioned centrifugal sliding device 10 moves the fixed member 12 fixedly fitted to the conveying screw shaft 9 and the movable member 13 fitted so as to be slidable in the longitudinal direction at symmetrical positions of the weight 14. The fixed member 12 and the movable member 13 are pivotally connected to each other via link rods 15, 15 of the same length, each having one end pivotally attached to the member, and a restoring bullet 16 is interposed between the fixed member 12 and the movable member 13. Note that the two weights 14 are arranged in symmetrical positions. One end of a movable rod 17 is attached to the movable member 13, and the other end of the movable rod 17 is provided with a shutter plate 18 that can adjust the degree of opening of the grain inlet 6 to be large or small.
Therefore, when the conveying screw shaft 9 has a specified rotation speed of 1200 r.p.m., the grain inlet 6 is opened to a size commensurate with the specified rotation speed, but the conveying screw shaft 9 has a function of supplying a large amount of grain. When the rotation speed becomes slower than 1200rpm, the shutter plate 18, which is operated by the centrifugal swinging action of the weights 14, automatically adjusts the opening degree of the grain inlet 6 to reduce the grain flow. , and the conveyance screw shaft 9 reaches the specified rotation speed (e.g.
1200r・p・m). and,
Once the conveyance screw shaft 9 has started to rotate at the specified rotation speed, the degree of opening of the grain inlet 6 is automatically adjusted by the centrifugal swinging action of the weights 14, 14 so that it is opened wide by the shutter plate 18. Grain is fed into the grain harvesting box 5 according to the number of rotations, and the number of rotations of the conveying screw shaft 9 is adjusted steplessly so that it always rotates at the specified number of rotations, and the grains are stably and efficiently fed. be transported to.

19 is a grain lifting wheel attached to the conveying screw shaft 9 located inside the grain lifting drum 8;
This is a grain-lifting cylinder connected to the cutting line side of the

Next, its effect will be explained.

Now, a predetermined amount of grain is carried into the dryer main body 1 by the elevator 2. Once a predetermined amount of grain has been carried into the dryer main body 1 in this manner, the carrying operation is stopped, and then the grain is circulated and flowed through the dryer main body 1 several times using the elevator 2. Drying hot air is applied to the circulating grains to dry them to a predetermined moisture content. When the grains are dried to a predetermined moisture content in this manner, the dried grains are transferred from the upper part of the elevator 2 through the supply gutter 7 to the grain conveying device via a switching device (not shown) disposed in the upper part of the elevator 2. At the same time, the conveying screw shaft 9 is rotated by the passive action of the passive pulley 11 so that it is rotated at a specified rotation speed, for example, 1200 r.p.m.

Then, the centrifugal sliding device 10 attached to the conveying screw shaft 9 is also rotated at the same time, and the two weights 14, 14 provided at symmetrical positions are swung out in the centrifugal direction, and the movable member 13 is restored. The shutter plate 18 is slid toward the fixed member 12 against the bomb 16, and the sliding action moves the shutter plate 18 to the left in FIG. The opening is opened to a size commensurate with the number of grains, and dried grains are supplied from the supply gutter 7 into the grain harvesting case 5. The dried grains supplied into the grain harvesting box 5 are conveyed into the grain lifting cylinder 8 by the conveying screw shaft 9, and then are sprung up by the rotating grain lifting wheel 19 and sent to any desired position along the grain lifting cylinder 20. It is something that is transported to a location.

By the way, during the grain conveyance work as described above, the grain dried in the dryer main body 1 is intermittently supplied into the grain harvesting cabinet 5 via the supply gutter 7 by the bucket-type elevator 2. If by chance the grain inlet 6 is opened wide and a large amount of material is fed into the grain harvesting box 5 at once, the conveying screw shaft 9 will be forced to rotate due to slip rotation caused by the resistance of the piled-up pressure of a large amount of dry grain. Therefore, the number of rotations becomes lower than the specified number, and the dry grain cannot be smoothly conveyed. However, when the conveying screw shaft 9 is rotated at a rotation speed lower than the specified rotation speed in this way, the centrifugal swing distance of the two weights 14, 14 is also reduced, so that the movable member 13 The shutter plate 18 automatically adjusts the amount of dry grain supplied by gradually adjusting the degree of opening of the grain inlet 6 to become smaller. The grain is supplied into the grain casing 5, and slip rotation due to resistance of the stacking pressure is quickly eliminated, and the conveying screw shaft 9 is rotated at a specified rotation speed.

Also, the degree of opening of the grain inlet 6 is determined by the shutter plate 18.
Due to the extremely small size, the amount of dry grain supplied into the grain harvesting box 5 is small, and therefore, when the conveyance screw shaft 9 reaches the specified rotation speed, the centrifugal swing distance of the two weights 14, 14 also decreases. As the size increases, the movable member 13 is moved to the left in FIG. supply to the inside.

Therefore, an amount of grain is always supplied into the grain harvesting box 5 in a controlled manner so that the conveying screw shaft 9 can maintain a constant rotation speed, so that the grain can be efficiently conveyed in a stable state at all times. I can do it.

[Brief explanation of the drawing]

The drawings show one embodiment of the grain conveying device according to the present invention, and FIG. 1 is an overall perspective view, and FIG.
The figure is an enlarged side sectional view of the main part with a part cut away. 3... Grain transport device, 5... Grain harvesting case, 6... Grain inlet, 8... Grain lifting drum, 9... Conveying screw shaft, 10... Centrifugal sliding device, 13... Movable member, 17...movable rod, 18...shaft board.

Claims (1)

[Scope of utility model registration request] A centrifugal sliding device is provided at one end of the conveying screw shaft which extends horizontally through the grain lifting drum and the grain harvesting case which are adjacent to each other in a communication manner, and the movable member of the centrifugal sliding device includes a A grain conveying device characterized in that one end of a movable rod is attached with a shutter plate that adjusts the opening degree of a grain inlet opening at the top.