JPH04330201A - Aerator equipped with drum-movable mechanism - Google Patents

Abstract

PURPOSE:To obtain the title aerator good in durability, capable of lifting a revolving drum up to the position of a truck's load-carrying platform by supporting in a vertically movable way such a drum with many cylindrical edges projected on the outer peripheral surface thereof using a drum-movable mechanism. CONSTITUTION:A revolving drum 36 with many cylindrical edges 42 projected on the outer peripheral surface thereof is supported with a drum-movable mechanism 48 in a vertically movable way. The drum-movable mechanism 48 is equipped with a driving shaft 44 and lifting arms 46, with the tips of said arms ascending or descending through the revolution of the driving shaft. Both the perpendicular side plates 34 of the body frame 26 and both the lifting arms are identical in length, with the lower end of each side plate provided with a bearing hole 40 open downward and the bearing hole 50 of each lifting arm made long so that the shaft 38 of the revolving drum be movable.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerator that increases the amount of underground ventilation by cutting roots and removing soil, thereby activating plants such as grass.

0002

BACKGROUND OF THE INVENTION Generally, when a plant's underground aeration is improved or its roots are occasionally cut, the number of fine roots increases or regenerates, thereby promoting growth and revitalizing the plant. Therefore, aerators are used at golf courses and fields where grass is grown to cut roots and remove soil.

[0003] As shown in FIG. 5, such an aerator 10 includes a rotating drum 12 and a frame 16 that supports its shaft 14, and is attached to the rear of a tractor 18 and used by being towed. At this time, as the drum 12 rotates, a large number of cylindrical blades 20 provided on the outer peripheral surface of the drum 12 sequentially pierce the ground, so that roots can be cut and earth and sand can be removed at the same time. Therefore, by attaching a side cover to each rotating drum 12, the earth and sand extracted through the hollow part of each cylindrical blade 20 can be stored inside the side cover. When you go to the edge of a golf course, etc., open the trap door and take out the accumulated dirt and dispose of it. Incidentally, since the weight of the rotating drum 12 and frame 16 alone is too light, a weight 24 is placed in the case 22 on the frame 16 during work to apply a load to the rotating drum 12.

0004

However, the earth and sand removed from the rotating drum 12 in this manner usually needs to be loaded onto a truck or the like and transported to a disposal site. For this reason, the earth and sand had to be lifted up to the truck bed.
The labor and time required for this work are large and cannot be taken lightly. Note that even if the aerator 10 is lifted up by the tractor 18, the bottom of the main body of the rotating drum 12 will only rise by about 25 cm from the ground.

The present invention has been made in view of these conventional problems, and an object of the present invention is to provide an aerator with excellent durability that allows easy disposal of the extracted earth and sand.

[0006]

[Means for Solving the Problems] In order to achieve the above object, an aerator according to the present invention includes a drum movable mechanism 48 that supports a rotary drum 36 having a large number of cylindrical blades 42 protruding from its outer peripheral surface so as to be movable up and down. . The drum movable mechanism 48 is attached to a drive shaft 44 that is horizontally suspended between the upper ends of both side plates 34 of equal length arranged vertically on the main body frame 26, and to a location near each vertical side plate 34 of the drive shaft 44. It is composed of two vertical side plates 34 whose rear ends are connected to each other and which respectively support a shaft 38 of a rotating drum 36 at each tip, and an elevating arm 46 of equal length. Furthermore, a bearing hole 40 with an open bottom for supporting the shaft 38 of the rotary drum 36 is provided at the lower end of each vertical side plate 34, and a bearing hole 50 of each lifting arm 46 is provided.
0 is an elongated hole in which the shaft 38 is movable.

[0007]

[Operation] With the above structure, when the drive shaft 44 is rotated in one direction or the opposite direction, the rear ends of the two lifting arms 46 are respectively connected to predetermined positions of the drive shaft 44. The tips of these lifting arms 46 rise or fall as they rotate. Therefore, by lengthening both vertical side plates 34 and both lifting arms 46 of the main body frame 26, it is possible to raise the rotary drum 36 at the tips of both lifting arms 46 and lift it higher than the ground, or lower it and place it on the ground. can.

After placing the rotating drum 36 on the ground, when a load such as the main body frame 26 or a weight is applied thereto, the lengths of the corresponding overlapping vertical side plates 34 and the lifting arms 46 are equal, and both lifting arms 46 A bearing hole 50 is provided at the tip of each
The shaft 38 of the rotating drum 36 is
slides upward in those elongated holes and fits into bearing holes 40 provided at the lower ends of both vertical side plates 34 from below. For this reason, the shaft 38 of the rotating drum 36 is connected to the main body frame 26.
It can be firmly supported by both vertical side plates 34 and both lifting arms 46.

[0009]

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings. FIG. 1 is a diagram showing the configuration of the main parts of an aerator equipped with a drum movable mechanism to which the present invention is applied, as seen from the right side.
FIG. 2 is a plan view showing the rotary drum placed on the ground. In the figure, 26 is a symmetrical main body frame forming the skeleton of the aerator, 28 (28a, 28b) are side frames arranged on the right and left sides of the same shape and size, 30, 32
are the crosspieces arranged before and after the two side frames 28 are connected. Each of these side frames 28 is a right-angled isosceles triangular combination assembled by vertically, horizontally, and diagonally arranged three elongated side plates. The front crosspiece 30 is interposed between the connecting portions of the horizontal side plates and the diagonal side plates of the both side frames 28, and the rear crosspiece 32 is interposed between the portions near the upper ends of the diagonal side plates. Furthermore, four rotating drums 36 (36a, . . . 36d) are provided at the lower ends of the vertical side plates 34 (34a, 34b), respectively.
A bearing hole 40 which is open at the bottom and supports the shaft 38 is provided. Incidentally, a bearing hole provided at the lower end of the left vertical side plate 34b is not shown.

These rotating drums 36 are all independent rotating drums having the same structure, and have a common shaft 38.
They are connected at regular intervals. Each rotating drum 3
6, a conventional cylindrical body having a large number, for example, 60 cylindrical blades 42 evenly arranged and protruding from the outer peripheral surface is used. Note that by drilling a large number of holes on the outer circumferential surface of the main body of each rotating drum 36 and closing both sides with circular nets for side covers, the earth and sand stored inside will be sieved and only the fine particles will be returned to the outside. be able to.

Four consecutive rotating drums 36 like this
A drive shaft 4 is attached to the main body frame 26 in order to enable vertical movement of the
4 and two elevating arms 46 (46a, 46
b) A drum movable mechanism 48 consisting of: This drive shaft 44 is horizontally suspended between the upper ends of both vertical side plates 34, and both lifting arms 46 extend their respective rear ends to the vertical side plates 34 of the drive shaft 44.
4, and support a predetermined position of the shaft 38 of the rotating drum 36 at each tip. Then, the bearing hole 50 of each lifting arm 46 is connected to the shaft 38.
A long hole is formed through the arm 46 so that it can be moved slightly along the longitudinal direction of each arm 46. Note that the length of each lifting arm 46 is approximately equal to the length of the vertical side plate 34.

Further, in order to transmit power to the drive shaft 44, an auxiliary frame is attached to the main body frame 26, and a power transmission device 52 is attached thereto. Note that the auxiliary frame is mainly supported by the crosspiece 32 on the rear side. This power transmission device 52 includes an input shaft 54 from a tractor, a hydraulic pump 56, a torque limiter coupling 58, a speed reducer 60, and the like. In addition, the power input from the tractor is transmitted from the input shaft 54 to the pulley or V
The torque is transmitted to the hydraulic pump 56 via the belt 62, but since the torque limiter coupling 58 is interposed between the hydraulic pump 56 and the pressure reducer 60, even if an excessive load is applied to the drive shaft 44, the reduction gear 60 will not be destroyed. It can be prevented.

FIG. 3 is a right side view showing the completed appearance of the aerator. In the figure, 64 is a forward/reverse switching lever that switches the rotation direction of the rotating drum 36, 66 is a case for placing a weight, 68 is a connecting frame with the top link of the tractor, 70 is a connecting plate with the lower link, and 72 is an upper/lower link. It is a movable support. Incidentally, the input shaft 54 is located at the center of the top link connection frame 68 arranged in the shape of an equilateral triangle.

When using this aerator to revitalize the lawn of a golf course, the operator first attaches the aerator to the rear of the tractor, places a weight on the case 66, and then lifts the entire aerator slightly and moves it to the golf course. move to the edge of Naturally, the support rod 72 is raised. Then, the aerator is lowered and loads such as the main body frame 26 and weights are applied to the four connected rotating drums 36. Then, the vertical side plate 34a on the right side and the lifting arm 46a that overlap are almost equal in length, and the vertical side plate 34b on the left side and the lifting arm 46b are also the same, and each of the ends of both lifting arms 46 has a long hole for a bearing. 50, the shaft 38 of the rotating drum 36 slides upward inside the elongated holes 50, and fits from below into the bearing holes 40 provided at the lower ends of both vertical side plates 34. . Therefore, the shaft 44 of the rotating drum 36 can be firmly supported by both vertical side plates 34 of the main body frame 26 and both lifting arms 46.

[0015] When the aerator is advanced, the drum 36 rotates and the cylindrical blades 42 provided on its outer peripheral surface successively pierce the ground. Then, as shown in FIG. 4, the cylindrical blades 42 of each rotating drum 36 cut the roots of the grass 74 and at the same time pull out the earth and sand 76 to form numerous ventilation holes 78 in the ground. At this time, if a side cover is attached to each rotating drum 36, the earth and sand 76 extracted through the hollow part of each cylindrical blade 42 can be stored inside the side cover. Accumulated soil must be disposed of appropriately, such as when going to the edge of the golf course. Note that in FIG. 4, the side cover is omitted and the number of cylindrical blades 42 is reduced.

When disposing of the aerator, first lift the entire aerator a little using a tractor. Then, due to the weight of the four connected rotating drums 36, the shaft 38 moves downward inside the elongated holes 50 of both lifting arms 46, and the shaft 38 moves downward inside the long holes 50 of both vertical side plates 34.
Get out of 0. Note that the rotating drum 36 indicated by the dotted line in FIG. 1 shows such a state. Therefore, the drive shaft 4
4, when the power to rotate counterclockwise is transmitted, the rotating drum 36 is lifted from the ground at the tips of both lifting arms 46, and
It can be moved in the counterclockwise direction of the arrow. Naturally, the longer both vertical side plates 34 and both lifting arms 46 are made, the higher the rotating drum 36 will rise. For example, it will rise about 110cm above the ground.

[0017] Therefore, the four
By lifting up each of the rotating drums 36 and opening each trap door, earth and sand can be dropped directly onto the loading platform and loaded. Thereafter, the forward/reverse switching lever 64 is operated to transmit clockwise rotational power to the drive shaft 44. Then, the rotating drum 36 can be moved clockwise as indicated by the arrow, lowered, and placed on the ground (the position shown by the dotted line in FIG. 1). Thereafter, the shaft 44 of the rotating drum 36 is similarly firmly supported by both vertical side plates 34 of the main body frame 26 and both lifting arms 46, and root cutting and earth and sand removal operations are continued.

[0018]

According to the present invention as described above, the shaft of the rotating drum can be firmly supported by both vertical side plates of the main body frame and both lifting arms during root cutting and soil removal work, thereby increasing durability. Furthermore, when disposing of the extracted earth and sand, the rotary drum can be lifted high with the ends of both lifting arms, and the earth and sand can be dropped directly onto the loading platform of a truck and loaded. Therefore, it is convenient to be able to easily dispose of the extracted earth and sand.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of essential parts of an aerator equipped with a drum movable mechanism to which the present invention is applied, viewed from the right side.

FIG. 2 is a plan view showing the rotary drum of the aerator placed on the ground.

FIG. 3 is a right side view showing the completed appearance of the aerator.

FIG. 4 is a perspective view showing the rotating drum of the aerator in a state of root cutting and soil removal.

FIG. 5 is a right side view showing an aerator towed by a conventional tractor.

[Explanation of symbols]

Claims (1)

[Claims] 1. An aerator equipped with a rotating drum having a large number of cylindrical blades protruding from its outer peripheral surface, comprising: a drum movable mechanism that supports the rotary drum in a vertically movable manner; and the drum movable mechanism is disposed perpendicularly to the main body frame. a drive shaft that is horizontally suspended between the upper ends of both side plates of equal length, and each rear end of the drive shaft is connected to a location near each vertical side plate,
It consists of two vertical side plates that support the shaft of the rotating drum at each tip, and a lifting arm of equal length, and a bearing hole with an open bottom that supports the shaft of the rotating drum at the bottom end of each vertical side plate. What is claimed is: 1. An aerator equipped with a drum movable mechanism, characterized in that the bearing holes of each lifting arm are made into elongated holes through which the respective shafts can be moved.