JPS6128763B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sand spreading belt for spreading and filling sand into the turf of an artificial grass sports field.

Generally, artificial lawns are made of flat pile threads made of synthetic resin such as polyamide or polyurethane, which are flocked onto a backing fabric. In this case, the grass grains are filled with sand in order to approximate natural grass as closely as possible in various properties, such as buffering capacity, ability to prevent spikes from getting caught, and moisture absorption capacity. Of course, the natural grass that makes up the greens of golf courses is also filled with sand, but the natural grass on the greens is short and the grain is not very dense, so the sand that is spread almost naturally. The sand gets into the grain of the grass and can be easily spread evenly by simply rubbing the grass surface lightly with a broom-shaped brush. However, since the pile threads of artificial grass are considerably longer than the length of natural grass and have a bulky structure, it is not possible to evenly fill the spread sand deep into the grass grains by simply rubbing it lightly with a brush. It is extremely difficult.

Therefore, an object of the present invention is to provide a sand spreading device for an athletic field made of artificial grass, which is equipped with brushing means that can efficiently and uniformly fill the grains of the sand spread on the artificial grass. Our goal is to provide the following.

In order to achieve the above object, the present invention provides a cart that moves on an artificial lawn, a hopper for storing sand mounted on the cart, and a hopper for discharging sand from the hopper to the rear in the traveling direction of the cart. transport, and
The brushing means includes a belt conveyor that sprinkles the material on the artificial lawn from its terminal end, and a brushing means that is disposed behind the belt conveyor and moves together with the trolley while rubbing on the artificial lawn. At least two rows of brushes are provided that are oriented in a direction substantially perpendicular to the moving direction of the trolley at the falling position of sand sprinkled from a belt conveyor, and the front brush brushes the tips of the leaves of the artificial lawn in the moving direction of the trolley. It is characterized in that it is tilted upward to promote the filling of sand into the turf grains, and the rear brush spreads the sand filled between the turf grains almost evenly.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the accompanying drawings.

FIG. 1 shows a schematic perspective view of a sand spreading device constructed in accordance with the present invention. This sand spreading device includes a cart 1 that runs on an artificial lawn. In this embodiment, the trolley 1 has a motor (not shown) and is configured to be self-propelled by the motor; however, it may be of a towed type that is pulled by a winch via a wire rope or the like. It may be hot. A hopper 2 for storing sand is mounted on the cart 1. In this case, the hopper 2 is provided so as to straddle between both side plates of the truck 1, and is provided with a discharge port 3 opened downward. Although not shown, a shutter plate is actually provided in relation to the discharge port 3 to control its opening degree. Further, the truck 1 has a belt conveyor 4 arranged below the hopper 2. This belt conveyor 4
1 is pivotally supported at the front and rear of the truck 1.
It consists of a pair of rollers 5, 5, and an endless belt 6 that passes between the rollers 5, 5 and passes below the discharge port 3 of the hopper 2. In this case, one of the rollers 5, 5 is not shown in the drawings. The engine is operatively connected to the engine as a driving source. The present invention is provided with a brushing means 7 which is arranged behind the belt conveyor 4 and moves together with the cart 1 while rubbing the artificial lawn. Referring to FIG. 2 and FIG. 3 together, this brushing means 7 includes a base frame 8 connected to the rear part of the truck 1, and a base frame 8 that is oriented in a direction substantially perpendicular to the moving direction of the truck 1. A plurality of rows, four rows in this embodiment, of brushes 9a to 9 are attached to the frame 8.
It is composed of d. In this embodiment, the base frame 8 includes four frame members 8a to 8d corresponding to the brushes 9a to 9d and extending in a direction substantially perpendicular to the moving direction of the truck 1,
Moreover, it is connected to the trolley 1 so as to reciprocate with a predetermined stroke in the left-right direction orthogonal to the direction of movement thereof. That is, as illustrated in FIG. 2, the base frame 8 facing the rear part of the truck 1
The frame member 8a has a frame member 1 extending along the left and right direction.
A pair of slits 10, 10 are bored, and a pair of connecting arms 11, 11, to which the rear part of the truck 1 is attached, are slidably locked in each of the slits 10, 10. In addition, each connecting arm 11, 1
1 is attached to the rear of the cart 1 so as to be rotatable in the vertical direction, so that the entire weight of the brushing means 7 is placed on the artificial lawn. Further, one end of an operating rod 13 extending into the interior of the truck 1 is fixed to the frame member 8a through a slit 12 bored at the rear of the truck 1, and the other end of the operating rod 13 is attached to a crank arm. 14
It is operatively connected to a motor 16 mounted on the truck 1 via a disc crank 15 including a disc crank 15 .
Therefore, the rotational motion of the motor 16 is converted into a linear reciprocating motion by the disk crank 15, and is transmitted to the base frame 8 via the operating rod 13. As a result, the base frame 8 is reciprocated in the left-right direction within a plane parallel to the artificial lawn surface with a predetermined stroke. On the other hand, each of the brushes 9a to 9d is connected to the frame members 8a to 9d.
It consists of bristles planted almost vertically at the lower end of 8d. In this case, each of the brushes 9a to 9d uses bristles made of, for example, white hair or nylon, which are stronger than the synthetic resin pile threads A constituting the artificial lawn.

Next, the operation of this sand sprinkling device will be explained. First, put dried sand into the hopper 2. As this sand, silicate mineral grains such as river sand, sea sand, silica sand, etc. are most suitable, and the grain size is preferably about 5 to 8 so-called silica sand. Then, while pulling the brushing means 7 through the connecting arms 11, 11, the trolley 1 is run in the direction of the arrow in FIG. 1, and the endless belt 6 of the belt conveyor 4 is moved counterclockwise in the same figure. This results in
The sand stored in the hopper 2 is discharged from its outlet 3.
The powder is then placed on an endless belt 6, transported to the rear of the trolley 1, and then spread onto the above-mentioned brushing means 7. In this case, in order to spread sand over a wider area, as shown by the imaginary line in Figure 3,
It is preferable to provide a rotating brush 17 at the rear end of the belt conveyor 4. The sand thus spread passes between each of the frame members 8a to 8d and falls onto the artificial lawn.
As the brushes 9a to 9d move, each of the brushes 9a to 9d advances while tilting each panel thread A of the artificial lawn forward in the direction of movement, so that each grass grain between the pile threads A is widened, thereby making it easier to spread the grass. The sand is efficiently filled into the grass grain, and the filled sand is spread almost uniformly by the subsequent brushes, in this embodiment brushes 9b, 9c and 9d. In order to more effectively fill and level the sand by the above-mentioned brushing means 7, the motor 16 is driven to move the brushing means 7 itself reciprocatingly in the left and right direction to apply a sizing effect to each pile yarn A. All you have to do is give. Note that, unlike the above embodiment, the base frame 8 of the brushing means 7 may be vibrated in the front-back direction, or if the grass is denser, a vibrator may be placed on the base frame 8. and each brush 9
It is preferable to apply vibration and the weight of the vibrator to a to 9d. On the other hand, regarding the brushes, this is not limited to the four-row configuration of the above embodiment. In other words, the preceding brush tilts the pile threads as described above to efficiently fill the grass grains with sand, and then the subsequent brush levels the filled sand, so in this sense, at least two It is sufficient to have row brushes.

As is clear from the description of the embodiments described above, according to the present invention, sand can be efficiently spread within the grains of an artificial lawn, which is considerably longer than a natural lawn and has a bulky structure. Moreover, it can be filled uniformly, and is extremely useful in constructing athletic fields made of artificial grass.

[Brief explanation of the drawing]

FIG. 1 is a perspective view schematically showing a sand spreading device according to the present invention, FIG.
The figure is a sectional view for explaining the action of the brushing means. In the figure, 1 is a trolley, 2 is a hopper, 4 is a belt conveyor, 7 is a brushing means, 8 is a base frame, 9a
~9d is a brush.

Claims (1)

[Scope of Claims] 1. A device for scattering and filling sand into the grain of an artificial lawn laid on a base made of cement, asphalt, etc., comprising: a cart that moves on the artificial lawn; and the cart. A hopper for storing sand mounted on the top; a belt conveyor for conveying sand discharged from the hopper backward in the traveling direction of the cart and spreading it onto the artificial lawn from its terminal end; and a brushing means that is disposed at the rear and moves together with the trolley while rubbing on the artificial lawn, and the brushing means is arranged in a direction substantially parallel to the moving direction of the trolley at a falling position of the sand sprinkled from the belt conveyor. At least two rows of brushes oriented in orthogonal directions are provided, and the front brush tilts the leaf tips of the artificial lawn forward in the direction of movement of the trolley to promote filling of sand in the grass grains. A sand spreading device for an athletic field made of artificial grass, characterized in that a rear brush spreads the sand filled between the grass grains almost evenly.