JPS6156363B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sand removal device that suctions and removes sand filled in the turf of an athletic field made of artificial grass.

Artificial lawns are generally made of synthetic resin pile threads planted on a base fabric using various methods, but they differ from natural lawns in terms of various properties such as buffering capacity, ability to prevent spikes from getting caught, and moisture absorption ability. In order to approximate this as closely as possible, dry sand is densely packed leaving about 1 to 2 mm of leaf tips within the grass grain. By the way, if this artificial lawn is significantly damaged due to wear, etc., the severely damaged areas will be removed with cutters, etc., and a new artificial lawn will be inserted into the damaged area to repair it. Sand within the grain of the grass must be removed. However, because the sand within the turf is compacted by the pressure of the competitors' feet, it was not possible to suction the sand sufficiently by simply pointing the suction port of the suction device at the turf surface. .

Therefore, an object of the present invention is to provide an artificial turf sports stadium that can quickly and effectively suck up sand that is filled into the turf grains of an artificial turf and compacted by treading or the like. Our objective is to provide sand removal equipment.

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

1 and 2 show schematic side and rear views of a sand removal device constructed in accordance with the present invention. This sand removal device includes a cart 1 that runs on an artificial lawn. A motor 2 is mounted on this bogie 1. In this embodiment, the motor 2 and the front wheels 3 are connected to each other via a clutch means (not shown), and by operating the clutch means, the bogie 1 can move automatically. It can be switched to either a running type or a hand-pushed type. Note that, since the motor 2 is also used as a drive source for a drum 7, which will be described later, another motor may be installed as a drive source for the trolley 1 to self-propel.
The rear wheel 3' is configured as a direction control wheel, and a bracket 15 that pivotally supports it is rotatably attached to the lower surface of the truck 1 via a bearing member (not shown). Almost in the center of the above-mentioned trolley 1,
A pair of arms 4, 4 are arranged so that the drum 7 having a large number of scraping pawls 9 is substantially perpendicular to the moving direction of the truck 1.
Height adjustable via. Fourth
The height adjusting means is illustrated in the figure, and according to this, the arm 4 has a female thread 18 bored in its upper end surface, and a handle 6 is attached to the female thread 18.
A male screw 5 integrally formed with the carriage 1 is screwed through a through hole 19 formed in the carriage 1. In this case, the male screw 5 described above has a flange portion 17 integrally formed on this shaft portion, and is rotatable via the flange portion 17 on a thrust bearing 16 provided on the truck 1 side. Retained. Therefore, the height of the drum 7 can be freely adjusted by rotating the handles 6, 6. A large number of the scraping pawls 9 are installed on the peripheral wall of the drum 7, and by adjusting the height of the drum 7, the scraping pawls 9 are designed to plunge into the sand in the grass grains that has been compacted by treading pressure or the like. . Note that a hemispherical head 10 is formed at the tip of the claw 9 to reduce the chance of the claw getting caught on the root of the artificial lawn, etc. (see FIG. 3). Further, the drum 7 is rotatably driven by the motor 2 via the endless belt 8. In this case, the rotational circumferential speed of the drum 7 is set in advance so that it is faster than the running speed of the truck 1. regulated. On the other hand, at the rear of the truck 1, a suction head 12 is mounted close to the drum 7 and is connected to a movable suction device 14 shown in FIG. 5 via a suction hose 13. In this case, the suction head 12 is arranged so that the suction port 11 opened at its tip is in contact with the lawn surface and faces the drum 7.

Next, the operation of this sand removal device will be explained.
First, the cart 1 is installed on the artificial lawn to be repaired.
Then, by rotating the handle 6, the height of the drum 7 is adjusted so that the claws 9 of the drum 7 plunge into the compacted sand in the grass. After that, motor 2
is operated and the trolley 1 is moved. Then, the drum 7 rotates via the endless belt 8, and the claws 9 scrape up the compacted sand. In this case, the rotation direction of the drum 7 is
to the side, i.e. clockwise in FIG.
Therefore, the sand scraped up by the claws 9 is sucked into the suction head 12 by the suction force of the suction device 14, and is sent to the suction device 14 via the hose 13.
It is stored in a vacuum tank (not shown) within the device. In the above embodiment, the suction device 14 is placed on the lawn and moved together with the cart 1 as shown in the figure, but the suction device 14 may be mounted on the cart 1. Of course. Moreover, although the trolley 1 is movably formed by wheels 3 and 3', instead of that,
It may be provided with sled-shaped legs and towed by a winch or the like.

As described above, according to the sand removal device of the present invention, the sand that is filled in the grass grains of an artificial lawn and compacted by treading pressure etc. can be easily sucked up by mechanical means. be able to. In addition, since the head of the rake claw is formed in a hemispherical shape, it is extremely useful, as it is less likely to get caught on the roots of the artificial lawn or the base fabric, and sand removal work can be carried out smoothly.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the sand removal device according to the present invention, Fig. 2 is a rear view thereof, Fig. 3 is a side view showing the scraping claw, Fig. 4 is a sectional view of the main part, and Fig. 5 is It is a side view showing a suction device. In the figure, 1 is a trolley, 2 is a motor, 4 is an arm, and 6
1 is a handle, 7 is a drum, 8 is an endless belt, 9 is a claw, 11 is a suction port, and 12 is a suction head.

Claims (1)

[Scope of Claims] 1. A device for suctioning and removing sand filled in the grass grains of an artificial lawn made by planting a large number of synthetic resin pile threads on a base fabric, the device comprising: a cart that moves on the cart; the cart is attached to the cart so that its height can be adjusted in a direction substantially perpendicular to the direction of movement;
and a drum having a large number of scraping claws on a peripheral wall, a driving means such as a motor that rotates the drum at a peripheral speed faster than the moving speed of the cart, and a suction means connected through a hose or the like. and a suction head having a suction port that opens toward the drum at the rear of the drum in the moving direction of the cart. Sand removal device. 2. The sand removing device according to claim 1, wherein the claw is formed with a hemispherical head.