JPH0242964B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of the Invention The present invention relates to a method for uniformly spraying dry sand onto artificial lawns laid on, for example, tennis courts, athletic fields, or golf course walking paths. Concerning sand spreading equipment.

(B) Background of the Invention The above-mentioned sand spreading device includes a sand spreading device 17 (Japanese Unexamined Patent Publication No. 1988-98904) as shown in FIGS. The supported rotary brush 19 is pressed onto the artificial lawn 6 by the weight 20, and is rotated in a counterclockwise direction opposite to the traveling direction of the trolley 18, so that the sand flow lower part 22 of the conveyor 21 is rotated.
Finishing dry sand 3 flowing down from the artificial lawn 6
This is a device dedicated to finishing that is sprayed on top.

However, the above-mentioned sand spreading device 17 only scatters the dry sand 3 from the sand flow lower part 22 at one location at the rear of the cart 18, and the amount of dry sand 3 flowing down from the sand flow lower part 22 alone cannot cover the lawn 6a. The dry sand 3 is filled only at the root portion, and a sufficient amount of dry sand 3 cannot be filled into the grass grains 6b in one run of the sand spreading device 17. Also, dry sand 3 for finishing
The same lawn 6 filled with dry sand 3 to spread
For this reason, for example, when spreading dry sand 3 on an artificial lawn 6 with a large area such as an athletic field, the sand spreading device 1
7 has to be spread over the lawn 6a by going back and forth many times, which not only makes the work of spreading the dry sand 3 time-consuming, but also has the problem of low work efficiency.

(C) Purpose of the Invention This invention has a unique structure in which the sand flow lower part for flowing down the dry sand in the hopper is provided at multiple locations in the direction of movement of the cart, so that the sand flow can be carried out in just one run of the device. To provide a sand scattering device capable of scattering and filling an artificial lawn with a sufficient amount of dry sand, and at the same time scattering finishing sand from the lower part of the sand flow at the rear of a cart to level the ground to a uniform sand thickness.

(d) Summary of the Invention This invention provides a hopper for storing dry sand in the upper part of the cart, and the lower part of the sand flow through which the dry sand stored in the hopper flows down is arranged at the front, rear and intermediate portions with respect to the traveling direction of the cart. It is also characterized by a sand scattering device provided at at least a plurality of locations.

(E) Effects of the Invention According to this invention, dry sand is sprayed onto the artificial lawn from the lower part of the sand stream provided at multiple locations on the trolley, so unlike the conventional sand-spraying finishing device, the dry sand can be sprayed over the artificial lawn many times. It saves you the trouble of reciprocating the equipment.
A sufficient amount of dry sand can be spread and filled on the artificial lawn in one run, and finishing dry sand is also spread at the same time from the bottom of the sand stream provided at the rear of the trolley.
Since the ground can be leveled to a uniform sand thickness, the work time required for dusting can be shortened and sand can be spread efficiently.

In addition, if a drop is installed before or after the sand flow lower part, the drop at the front stage of the sand flow lower part tilts the lawn, making it easier for dry sand to flow into the deep part of the grass grain that has been expanded by this tilt. At the same time, the drops installed at the latter stage of the sand flow can shake off the dry sand on the lawn, and the pushing action of the drops can reliably fill the grass, and the surface area of this filled dry sand can be reliably filled. The sand can be leveled with subsequent drops to achieve a uniform sand thickness.

Furthermore, if a leveling plate is installed on the conveyor surface, for example, when the amount of dry sand stored in the hopper decreases, the conveyor can prevent the dry sand from being conveyed unevenly to both sides of the conveyor. It can be evenly distributed on the conveying surface and sprayed in an even amount on the artificial lawn.

Furthermore, when an opening/closing means is provided at the sand outflow section at the bottom of the hopper, the dry sand is flowed down in proportion to the amount of dry sand filled in the lawn so that more than a predetermined amount of dry sand is not spread and filled. The amount of dry sand flowing out from the sand outflow section can be regulated by selecting whether to use or not use the sand flow lower part at two or three locations.

(F) Embodiment of the Invention An embodiment of the invention will be described in detail below based on the drawings.

The drawing shows a sand spreading device that spreads dry sand on an artificial lawn.
A hopper 4 for storing dry sand 3 is installed in the center of the truck 2, and sand flow lower ports 4a, 4a are provided at the front and rear of the hopper 4 at the lower part of the hopper 4 in the direction of movement of the truck 2. At the same time as opening, both sand flow lower mouths 4a,
A sand flow passage 4b is formed in the middle part of the carriage 2.
Conveyors 5, 5 for conveying dry sand 3 are stretched over the front and rear parts of the trolley 2, respectively, and the front, rear and bottom parts of the trolley 2 are made of synthetic rubber that is harder than the lawn 6a of the artificial lawn 6. It is constructed by vertically disposing plate-like hangings 7.

As shown in Fig. 2, the above-mentioned trolley 2 has four wheels 8 pivotably mounted on both sides and can be driven by a guide or by hand, or can be self-propelled by being equipped with a drive means such as a motor. It is possible.

As shown in FIG. 1, the aforementioned hopper 4 has shutters 9, 9 attached to the front surfaces of both sand flow lower openings 4a, 4a so as to be openable and closable.

On the other hand, a feeding roller 10 for feeding dry sand 3 is rotatably supported at the sand entrance portion of the sand flow lower passage 4b, and this feeding roller 10 is rotatably supported.
When rotating, the dry sand 3 flows down from the sand flow lower passage 4b,
The feeding of the dry sand 3 is stopped by stopping the rotation.

As shown in FIG. 1, the aforementioned two conveyors 5, 5 are connected to drive pulleys 5a, 5a which are pivotally supported at the lower positions of both sand flow lower openings 4a, 4a of the hopper 4, and to the front and rear of the cart 2, respectively. The drive belts 11a, 1 are stretched between the driven pulleys 5b, 5b, and rotated by two drive motors 11, 11 installed inside the truck 2.
1a, the front conveyor 5 rotates in the traveling direction of the truck 2, and the rear conveyor 5 rotates in a counterclockwise direction opposite to the traveling direction of the truck 2.

As shown in FIG. A gap is formed between the conveyor surface and the conveyor surface through which the sand can pass, and the leveling plate 12 evenly distributes the conveyed dry sand 3 onto the conveyor 5, as shown in the figure.

As shown in FIG. 1, the above-mentioned sag 7 is located at the front end of the support frame 13 installed at the front of the truck 2, that is, at the front side of the sand flow lower part 14 where the dry sand 3 flows down from the front conveyor 5. On the other hand, a rear conveyor 5 is installed on a support frame 13 installed at the rear of the trolley 2.
At the front and back positions of the sand flow lower part 15, there are two hanging pieces 7, 7.
are vertically placed at a distance.

Furthermore, a sand flow passage 4b is provided on the bottom of the trolley 2.
A plurality of hangings 7 are vertically installed at predetermined intervals on the front side and the rear side of the lower sand flow lower part 16, respectively.

Note that the above-mentioned sag 7 may be formed of a soft resin that is harder than the lawn 6a.

The sand spreading device 1 configured in this way can spread the artificial lawn 6.
When spraying dry sand 3 on the road, as shown in Figure 1, use the shutters 9 and 9 before driving.
The amount of dry sand 3 flowing down from both sand flow downstream ports 4a, 4a is set by adjusting the opening/closing amount of the sand flow.

Next, at the same time as the trolley 2 is run (in the direction of the arrow), the drive motors 11, 11 are started to rotate both conveyors 5, 5, and each sand flow lower opening 4a of the hopper 4,
The dry sand 3 flowing down from the sand 4a is evenly distributed on the conveying surface of the conveyor 5 by the leveling plate 12, and is spread onto the artificial lawn 6 from the sand flow lower part 14 at the front of the trolley 2 and the sand flow lower part 15 at the rear, respectively. .

At the same time, the feed roller 10 pivotally supported on the sand flow lower passage 4b is rotated to scatter dry sand 3 from the sand flow lower part 16 at the lower part of the sand flow lower passage 4b.

Then, the hanging 7 installed vertically at the front of the cart 2 tilts the flocked grass 6a group in a direction perpendicular to the direction of movement of the cart 2, expanding the grass grain 6b.
Fill b with dry sand 3.

Next, with the hanging 7 vertically installed on the bottom of the trolley 2,
While shaking off the dry sand 3 on the surface of the lawn 6a, push the dry sand 3 from above into the grass 6b.
Make sure to fill it up.

Furthermore, the dry sand 3 flowing down from the sand flow lower part 16 at the center of the trolley 2 is pushed into the grass grains 6b by the pushing action of the hangings 7 vertically installed on the rear side of the sand flow lower part 16. The surface portion of the filled dry sand 3 is leveled with subsequent drips 7 to adjust the level to a uniform sand thickness.

Thereafter, dry sand 3 for finishing is sprinkled onto the artificial lawn 6 from the sand flow lower part 15 at the rear of the cart 2, and the sand is finished with a uniform sand thickness.

In this way, multiple sand flow lower parts 14, 15, 16
Since dry sand 3 is to be spread from the sand spreading device 1,
In one run, a sufficient amount of dry sand 3 is spread and filled, and finishing dry sand 3 is spread to level the ground, so unlike conventional sand-spreading and finishing equipment, it does not have to be reciprocated many times. It saves time and allows for efficient sand spreading work.

In addition, by the pushing action of the hangings 7 vertically disposed on the front, rear, and bottom portions of the cart 2, the dry sand 3 can be reliably filled into the grass grains 6b.

For example, when the amount of dry sand 3 stored in the hopper 4 decreases, a leveling board 12 installed on the conveyance surface of the conveyor 5 moves the dry sand 3 that is conveyed in a partially biased manner to the conveyor 5. The artificial lawn 6 can be sprayed in an even amount by being evenly distributed on the conveying surface of the artificial lawn 6.

Furthermore, by rotating and stopping the feeding roller 10 to open and close the sand flow passage 4b, for example, the grass grain 6b is prevented from being filled with more than a predetermined amount of dry sand 3.
Each sand flow lower part 14, 15, 16 flowing down the dry sand 3 is divided into two parts according to the amount of dry sand 3 filled in the
The amount of sand flow can be regulated by selecting whether or not to use one or three locations.

In addition, in the above-mentioned embodiment, the sand flow lower part 1 at three locations
4, 15, and 16 are provided, but it is also possible to provide two or three sand flow lower passages 4b at the lower part of the hopper 4 to add a plurality of sand flow lower passages. , a U-shaped leveling plate 12a may be installed on the conveyance surface of the conveyor 5, and the present invention is not limited to the configuration of the embodiment.

The opening/closing means constituting this invention corresponds to the shutter 9 and the feeding roller 10 of the above-mentioned embodiment, and the sand outlet portion is located at the sand flow lower opening 4a of the hopper 4.
and the sand flow lower passage 4b, respectively.

(g) Other embodiments of the invention As shown in FIG. 4, a sand scattering device 1 is provided with sand flow passages 4b at three locations at the front, rear, and intermediate portions of the lower part of the hopper 4 with respect to the traveling direction of the trolley 2. A feeding roller 10 for feeding out the dry sand 3 is pivotally attached to the sand inlet portion of each sand flow lower passage 4b, and
Each sand flow lower passage 4b... Each lower sand flow lower part 14, 1
Drops 7 for pushing in the spread sand are vertically installed in the front and rear stages of 5 and 16.

The sand spreading device 1 configured as described above can spread the dry sand 3 in one run, as in the above-mentioned embodiment.
Filling and finishing sand scattering can be performed at the same time, and there is no need to equip the conveyor 5, drive motor 11, etc., and the structure is simple, so manufacturing costs are low.

In addition, instead of the above-mentioned feeding roller 10, a shutter 9 may be provided so as to be openable and closable.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a longitudinal cross-sectional side view of the sand spreading device, Fig. 2 is a perspective view of the sand spreading device, Fig. 3 is a plan view of the leveling board, and Fig. 4 is a side view of the sand spreading device. Fig. 5 is an enlarged longitudinal sectional side view of the main part of a sand spreading device showing a conventional example;
The figure is a perspective view of an enlarged main part of FIG. 4. 1... Sand spreading device, 2... Trolley, 3... Dry sand, 4...
Hoppa, 4a... Sand flow lower mouth, 4b... Sand flow lower passage, 5
...Conveyor, 6...Artificial lawn, 7...Drop, 9...Shattering, 10...Feeding roller, 12, 12a... Leveling board, 14, 15, 16... Sand flow lower part.

Claims (1)

[Claims] 1. A hopper for storing dry sand is provided on the upper part of the cart,
A sand scattering device, wherein sand flow lower portions through which dry sand stored in the hopper flows down are provided at at least a plurality of locations in the front, rear, and intermediate portions with respect to the traveling direction of the truck. 2. The sand scattering device according to claim 1, wherein a drop is provided in the lower part of the sand flow, either before or after the sand flow lower position. 3. A conveyor is provided to convey the dry sand in the hopper to the lower part of the sand flow, and leveling plates are installed at separate positions on the conveyance surface of the conveyor to evenly distribute the dry sand on the conveyor. term, or second
Sand spreading equipment as described in section. 4. The sand spreading device according to claim 1, wherein a plurality of sand outflow sections are provided at the lower part of the hopper, and an opening/closing means for opening and closing the sand outflow sections is provided.