JPS6338739Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a spreader that spreads granular fertilizers, seeds, etc. using rotational centrifugal force.

Conventionally, this type of spreader has a rotating plate below the outlet of the hopper that temporarily stores fertilizer, etc., and multiple blades of the same shape and size are attached radially and horizontally to this rotating plate. was. For this reason, when the rotary plate is rotated during dispersion and fertilizer, etc. is dropped from the outlet of the hopper onto the rotary plate, the fertilizer, etc. is carried along the multiple blades by the centrifugal force caused by the rotation of the rotary plate.
It scatters in a radial pattern and is scattered around the sprayer.

However, in conventional spreaders, multiple blades all have the same shape and size, and are mounted horizontally on the rotating plate, so the radial velocity when the fertilizer leaves the blades when the rotating plate rotates is If the rotational speed of the plate was constant, all the blades would have the same speed, and the fertilizer etc. would only be spread a certain distance from the spreader. For this reason, if the rotating speed of the rotating plate is low, it will only be possible to spread within a short distance, and if the rotating speed of the rotating plate is high, the spreading distance will be longer, but it will not be possible to spread fertilizer etc. in a circular pattern. In both cases, the problem was that the spray area was small. If an attempt was made to improve this point and obtain a wider spraying area by varying the rotational speed, the drive device for the rotary plate would become complicated, resulting in an expensive spreader.

This idea eliminates these drawbacks,
To provide a simple-structured and inexpensive spreader capable of spreading materials such as fertilizer over a wide range while keeping the rotational speed of a rotary plate constant.

The feature of this invention is that multiple blades are attached radially to the rotary plate, are attached to the rotary plate at an upward angle, and each blade has a different length in the radial direction. The plural blades have a U-shaped cross section, and when these blades rotate together with the rotary plate, the peripheral speed of the tip of each blade is The point is that each blade applies different centrifugal forces of different sizes to the material to be spread.

Examples of this invention will be described below based on the drawings. As shown in FIGS. 1 to 3, a rotary plate 2 is provided below a hopper 1 that temporarily stores fertilizer. This rotating plate 2 consists of a circular bottom plate 2a and a conical side plate 2b. A rotating shaft 4 of a drive device 3 is attached to the center of the rotating plate 2 . The conical side plate 2b has blades 5a to 5d of four different shapes and sizes, as shown in the developed views of FIGS. 3, 4, 6, 8, and 10. It is attached by bolts 6 and nuts 7 radially around the rotating shaft 4 and inclined upward along the side plate 2b. The broken lines in FIGS. 4, 6, 8, and 10 indicate folding lines, and 8 indicates bolt holes, respectively. The four types of blades 5a to 5d are shown in FIG.
As shown in the side views of FIGS. 7, 9 and 11, a "U" shape is formed. Reference numeral 9 denotes an opening/closing lever for the outlet (not shown) of the hopper 1.

In the spreader with such a configuration, when the drive device 3 is started and the rotary plate 2 is rotated at a constant speed, when the opening/closing lever 9 is used to open the outlet of the hopper 1, the fertilizer is deposited on the bottom plate 2a of the rotary plate 2. Fall. The fertilizer that has fallen onto the bottom plate 2a is rapidly moved by centrifugal force into the blades 5a to 5d attached to the side plate 2b and scattered from their tips. At this time, since the blades 5a to 5d have different sizes and shapes, the fertilizer spreading distance changes for each blade. That is, since the circumferential speed at the tip of the blade changes in order of the length of the blade, the fertilizer spreading distance becomes longer in the order of fertilizer 5d, 5b, 5a, and 5c. The blades 5a and 5c have the same length up to their tips, but since the length l of the lower surface of the blade 5c is longer than the length l' of the lower surface of the blade 5a, the spraying distance of the blade 5c is longer. Also, the blades 5a to 5d
Since the fertilizer is installed in an upwardly inclined manner along the side plate 2b, the fertilizer spreading distance becomes relatively longer than in the conventional horizontal position.

In the above example, there are four types of blades and the number of blades is eight, but the present invention is not limited to this. Further, the material to be sprayed is not limited to fertilizers, but may also be other granular materials such as seeds and medicines.

As described above, according to the present invention, by changing the dimensions of the blades attached to the rotary plate for each attachment position, it is possible to scatter the material to be spread over a wide range. In addition, by making the cross-sectional shape of the blade U-shaped, the object to be spread can be grasped reliably, and by oriented the blade in a radial and upward direction, it is possible to spread the object over a long distance. . Furthermore, since the rotary plate drive device does not require a speed change mechanism, the structure of the drive device is simple, and a spreader with low manufacturing cost can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a front view of a spreader according to an embodiment of the present invention, Fig. 2 is an enlarged plan view of its main parts, Fig. 3 is a sectional view along AA' of Fig. 2, Figs. 4, 6, 8, and FIG. 10 is a developed view of the blade of the present invention, and FIGS. 5, 7, 9, and 11 are side sectional views thereof. 1: Hopper, 2: Rotating plate, 3: Drive device,
5: Feather.

Claims (1)

[Scope of utility model registration request] A hopper that temporarily stores the material to be spread; a rotating plate provided below the outlet of the hopper;
In a spreader equipped with a plurality of blades radially attached to a rotary plate and a drive device for rotating the rotary plate, the plurality of blades have a cross section formed in a U-shape. , and have different lengths in the radial direction, and are attached to the rotary plate with an upward inclination.