JPS6350487B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sand recovery device suitable for efficiently scraping out and recovering sand filled in the grains of an artificial lawn.

[Background of the invention]

An artificial lawn with sand is an artificial lawn made by planting flat filamentous pieces made of synthetic resin such as polyamide or polyurethane into a backing fabric, and filling the grains of the grass with fine sand. ability,
It is similar to natural grass in terms of properties such as the ability to prevent spikes from getting caught and the ability to absorb water, and because the weight of the sand fixes the grass base material, there is almost no need for fixing methods such as nails or adhesives. In addition, it has been used in tennis courts, soccer fields, and other athletic fields because it is easy to maintain on a daily basis. As described above, artificial lawns filled with sand have various advantages, but on the other hand, when trying to replace part or all of the artificial lawn base material, it is important to know how to efficiently use the sand filling. The question is whether to remove it.

[Purpose of the invention]

This invention was made in view of the above-mentioned problems, and its purpose is to provide sand that can be mechanically and efficiently scraped out and recovered from the sand that is filled in the turf grains without the need for manual labor. An object of the present invention is to provide a sand collection device for artificial lawns.

[Structure of the invention]

The invention will now be described in detail with reference to embodiments illustrated in the accompanying drawings.

As shown in Figure 1, this sand collection device consists of one steering wheel 2 placed in front and a pair of left and right rear wheels 3 placed in the rear (only one of which is shown in the figure). The vehicle is equipped with a so-called tricycle-type trolley 1 having a structure (not shown). In this embodiment, a motor 4 is mounted on the bogie 1, and the motor 4 drives the rear wheels 3, and the steering wheel 2 is equipped with a handle 5 for direction control. is installed. Note that, of course, an electric motor may be used instead of the engine.

The trolley 1 is equipped with a hopper 6 for storing the collected sand, and the trolley 1
A rotating brush 8 is pivotally connected to the rear part of the brush 8 via a pair of left and right arms 9, 9. That is, the rotating brush 8 is held between one ends of the arms 9, 9 so that its axis of rotation is perpendicular to the traveling direction of the truck 1, while the other ends of the arms 9, 9 are pivotally connected to the truck 1. has been done. According to this embodiment, the rotating brush 8 is operatively connected to the engine 4 via a power transmission system that includes a chain 10. In this case, the rotating direction of the rotating brush 8 is
1 and 2, the direction of rotation is counterclockwise in the figures.

Therefore, when this rotating brush 8 is pressed against the artificial lawn A with appropriate pressure and rotated in the opposite direction, the sand 11 filled in the grass grains is removed by the rotating brush 8.
At the same time, along with the moving direction of the rotating brush 8, it is pushed out in the form of ridges on both sides as shown in FIG.

This sand collection device includes a bucket 12 that collects sand 11 while being towed by a cart 1. That is, in this embodiment, bucket 1
2 are provided at rear positions at both ends of the rotating brush 8, and are connected to the rotating shaft 8a of the rotating brush 8 via arms 13, 13. The buckets 12, 12 are connected to each other at a predetermined interval by a connecting rod 14 as shown in the figure, but in some cases, one bucket with a width larger than the rotating brush 8 may be used. good. As illustrated in FIG. 2, each of the buckets 12 is composed of a housing having a substantially triangular cross section with an opening at the front so as to scoop out the sand 11 pushed out to the side of the rotating brush 8, for example. A bracket 15 for pivotally mounting one end of the arm 13 is protruded from the inner surface of the upper wall. Further, a cylindrical portion 16 for connecting a pipe is erected on the upper wall of the bucket 12. On the other hand, a sand collecting means for collecting sand scooped into the bucket 12 is provided above the hopper 6. This sand recovery means includes a vacuum pump 18 connected to the cylindrical part 16 of the bucket 12 via a flexible pipe 17, and a filter member 19 connected to the discharge port side of the vacuum pump 18. This filter member 19 captures perishable substances such as fallen leaves that are also collected. Therefore, according to this configuration, the sand pushed out to the side of the rotating brush 8 is scooped up by the bucket 12, and is sent to the hopper 6 via the flexible pipe 17 by the vacuum pump 18.
It will be collected inside.

In the above embodiment, the arm 13 of the bucket 12 is hooked onto the rotating shaft 8a of the rotary brush 8, but it goes without saying that the arm 13 may be pivoted directly to the cart 1. Also,
Although a vacuum pump is used as the sand collecting means, a conveying means such as a bucket conveyor may be used instead. Furthermore,
Instead of the hopper 6, a bag 21 may be detachably attached to a frame 20 as shown in FIG. 4, and the sand may be collected in the bag 21. On the other hand, this sand collecting device can also be used as a sand spreading device by making some modifications. That is, a belt conveyor 22 is provided below the hopper 6 as shown by the imaginary line in FIG. All you have to do is
The sand thus spread is efficiently filled into the grains of the artificial lawn A with a substantially uniform thickness by the subsequent rotating brush 8. In this case, as the rotating brush 8 passes, some of the sand is pushed out to both sides, but the sand is scooped out by the bucket 12 in the same way as above, so that the surface of the artificial lawn containing sand can be cleaned. can be finished.

FIG. 5 shows a second embodiment of the invention. According to this, this sand recovery device includes a second truck 32 that is towed by the truck 1 via a connecting arm 31, and a hopper 33 for sand recovery is provided on the truck 32. In front of this second truck 32, bucket carts 12, 12 similar to those in the above embodiment are attached via a holding arm 34, and a vacuum pump 18 is provided in the hopper 33. The buckets 12, 12 and the vacuum pump 18 are connected via a flexible pipe 17. Therefore, in this second embodiment, the sand scooped into the buckets 12, 12 is transferred to the second cart 3.
It will be collected into a hopper 33 provided at 2.

[Effects of the Invention] As is clear from the description of the embodiments described above, according to the present invention, the rotating brush scrapes out the sand filled in the grass grains, and at the same time, the sand filled in the grass is scraped out by the cart behind the rotating brush. Provide a bucket cart to be towed,
By scooping up the sand pushed out to the side of the rotating brush with this bucket, the sand filled in the artificial lawn can be efficiently and mechanically collected without any effort.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the sand collecting device according to the present invention, and FIG. 2 is a schematic cross-sectional view for explaining the state in which sand is scooped out with the bucket shown in FIG. 1. Figure 3 is a sectional view showing the rotating brush and the ridge-shaped sand formed as it passes through the brush, Figure 4 is a perspective view showing a modified example used as an alternative to the sand recovery hopper, and Figure 5 The figure is a perspective view showing a second embodiment of the invention. In the figure, 1 is a trolley, 4 is a motor, 6 is a hopper,
7 is a belt conveyor, 8 is a rotating brush, 12 is a bucket, and 18 is a vacuum pump.

Claims (1)

[Scope of Claims] 1. A motorized self-propelled trolley that runs on an artificial lawn with sand filled in the grass grains, and a motorized self-propelled trolley that is arranged perpendicular to the direction of movement of the trolley. A rotating brush driven by the prime mover is connected, and the sand filled in the grass grain is scraped out and collected by rotating the rotating brush in a reverse direction with respect to the traveling direction of the cart. A sand recovery device for artificial lawns, characterized in that the trolley is provided with buckets for scooping up sand pushed out in ridges on both sides as the rotating brush advances. Sand collection device for artificial lawns.