JP2520985B2 - Sand leveling device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called sand leveling / spreading device for uniformly filling a grain of sand or the like into the grass of an artificial turf to form a sand-containing artificial turf.

[0002]

BACKGROUND ART Synthetic resin fiber yarns such as polyamide and polyvinylidene chloride are planted on a woven fabric, and artificial turf is piled from the back side with synthetic rubber or the like to be used, for example, on a tennis court or a golf course. In this case, by filling a granular material such as sand into the grass grain, the cushioning performance and the catch such as spikes are made as close as possible to the natural grass.

As a device for spraying sand or the like into the turf of such artificial turf, as is conventionally seen in, for example, Japanese Patent Publication No. 63-53324, after a trolley carrying a hopper for storing sand to be sprayed. Some have a rotating brush attached to the end. In the spraying device using this rotating brush, by appropriately adjusting the pressure of the rotating brush against the artificial turf, the rotation of the rotating brush expands the grass of the artificial turf and applies vibration to the turf leaves. As a result, there is an effect that the sand dropped from the hopper is efficiently and uniformly filled in the grass.

[0004]

By the way, when the dispersed sand is leveled with a brush, the pressure or the positional relationship between the brush and the artificial grass surface layer has a great influence on the leveling accuracy of the sand. In particular, in the spraying device using the rotating brush, although the above-mentioned effect is obtained, this effect becomes extremely large because it contacts the surface layer of the artificial grass on the ground in a form close to the linear pressure. If the pressure on the artificial grass is small, the above effect cannot be obtained. On the contrary, if the pressure is large, the sand dropped from the hopper will be scraped out by the rotating brush as shown in FIG.

In this type of apparatus using a conventional rotating brush, the control of the pressure on the artificial turf is performed by hydraulic pressure or a turnbuckle with reference to the carriage of the spraying apparatus. On the other hand, normally, sand is sprayed on artificial turf several times, but with this type of conventional device, the position of the rotating brush is delicately changed every time the amount of sand already sprayed changes. If it is not adjusted, good leveling and spraying will not be possible, and in addition, the vertical movement of the dolly received from the running surface will change the pressure of the rotating brush against the surface of the artificial turf, and the sand will fall within the grass of the artificial turf. There was a problem in that it was extremely difficult to make adjustments to achieve uniform leveling.

An object of the present invention is to make a simple adjustment so that even if the bogie moves up and down during traveling,
Alternatively, another object of the present invention is to provide a sand leveling / spreading device which can always level the sand uniformly as the sand filling amount increases.

[0007]

In order to achieve the above object, according to the present invention, a pair of left and right arms swingable around a horizontal axis is provided at a rear portion of a carriage, and bearings at both ends of a rotating brush are provided. The part is supported by each arm, and a pair of left and right sleds in contact with the traveling surface of the bogie and a mechanism for adjusting the vertical position of each sled with respect to the arm are provided near the bearings on both ends of the rotating brush of each arm. It is characterized by the provision.

[0008]

[Operation] The left and right sleds respectively mounted on a pair of arms swingable around a horizontal axis with respect to the bogie are always on the running surface (surface layer of artificial turf) regardless of the vertical movement accompanying the traveling of the bogie.
The sled position of the arm, that is, the vertical position with respect to the traveling surface, is always regulated by this sled. Therefore, the rotary brush whose both end bearings are supported by each arm is regulated in height position with respect to the left and right warps, that is, the running surface (artificial turf surface layer). If the vertical position of each sled with respect to the arm is adjusted appropriately, the position of the rotating brush with respect to the surface of the artificial turf, even if the trolley moves up or down due to running or the amount of sand that has been sprayed changes, Is always almost constant, and the intended purpose can be achieved.

[0009]

Embodiment FIG. 1 is a side view showing an overall configuration of an embodiment of the present invention, and FIG. 2 is a plan view thereof. Handle 1 for trolley 1
A front wheel 11, which is a steered wheel steered by 0, and a pair of rear wheels 12 are provided.
An engine 14, a hydraulic unit 15, a seat 16 and the like for driving the rear wheels 12 are mounted on the upper side, and a hopper 17 for storing sand to be sprayed is loaded thereon.

An opening / closing door (not shown) is provided at the lower end of the hopper 17, and this door can be opened and closed by operating the hopper opening / closing lever 171. Further, the hopper 17 is provided with an elevating cylinder 18 for elevating a rotating brush 21 described later. The hydraulic unit 15 includes a hydraulic tank, a hydraulic pump driven by the engine 14 described above, a hydraulic motor for rotating the rotating brush 21 via the belt 19 in the direction shown by the arrow in FIG. 1, and various directional control valves. By operating the manual valve 151 provided adjacent to the seat 16, the rotary brush 21 can be rotated / stopped or the lifting cylinder 18 can be driven.

A pair of left and right arms 20a and 20b which are swingable about a horizontal shaft 131 provided on the frame 13 are disposed behind the vehicle body frame 13. The left and right bearings 21a and 21b of the rotary brush 21 are supported at the tip ends of the arms 20a and 20b. Further, the arms 20a and 20b are provided with sleds 22 near the left and right bearings 21a and 21b, respectively.
a and 22b, and a vertical position adjusting mechanism as described below are provided.

FIG. 3 is an enlarged view of the vicinity of the sled 22a.
The sled 22a has a pin 2 at a substantially central portion in the longitudinal direction.
It is rotatably joined to the support shaft 221 via 22, and the support shaft 221 is engraved with a male screw at its upper portion. The arm 20a is formed with a bracket 201 and a steady rest bracket 202 which respectively project laterally, and the bracket 201 and the steady rest bracket 202 are provided with vertically penetrating holes. With the support shaft 221 of the sled 22a passing through these holes, a positioning nut 223 is screwed into the male screw portion from below the bracket 201, and a fixing nut 224 is screwed from above the bracket 201. In addition,
A handle is attached to each of the nuts 223 and 224 so that they can be easily rotated by hand.

With this configuration, the fixing nut 224 is loosened, and the positioning nut 223 is moved to a desired position. Then, the fixing nut 224 is fastened to move the vertical position of the sled 22a with respect to the arm 20a. It can be adjusted. It should be noted that the steady rest bracket 202 is provided on the sled 20a during traveling of the carriage 1.
Is displaced rearward due to friction with the ground contact surface, and the support shaft 221
It has a function to prevent it from falling.

This structure has a sled 22b and an arm 20b.
Is exactly the same. The lifting cylinder 18 is provided with a rotary brush 2 via arms 20a and 20b as needed.
1 is for moving up and down, and when the rotating brush 21 is lowered, the rotating brush 21 is attached to the arms 20a, 2
Due to its own weight including 0b, the vehicle descends on the running surface and comes into contact with the ground. Therefore, when the rotary brush 21 is lowered, the rotary brush 21 is configured to come into contact with the running surface under the contact pressure according to the adjustment state of the vertical positions of the sleds 22a and 22b.

According to the above-described embodiment of the present invention, the positions of the arms 20a, 20b swingable with respect to the carriage 1 with respect to the traveling surface (surface layer surface of artificial turf) are sled 22a,
The position of the arm 20a, 20b is regulated by the position of 22b.
Therefore, the rotary brush 21 having the bearings 21a and 21b at both ends thereof is maintained at a constant vertical position with respect to the traveling surface even if the carriage 1 moves up and down as the vehicle travels.

Further, since the sleds 22a and 22b are in contact with the running surface with a certain length, even if there are fine irregularities on the running surface as shown in FIG. It is possible to move and level the sand evenly within the grass of the artificial grass. Further, when the sleds 22a and 22b are pin-joined to the support shaft 221, as shown in FIG. 5, even if a large amount of sand S scattered from the hopper 17 is locally dropped and collected in a convex shape. As the sleds 22a and 22b rotate about the pins, the vertical position of the rotary brush 21 does not rise so much, and the sand of the convex portions can be taken in and smoothed.

To further increase this effect, FIG.
As shown in, the bracket 2 of the arm 20a (20b)
01 and the positioning nut 223, the coil spring 6
The coil spring 60 exerts a buffering function on a local convex portion by interposing 0, and the sled 22a (22b) can escape to a certain degree above the arm 20a (20b). desirable.

Using the embodiment of the present invention as described above, the leaf height is 25 mm, the thread thickness is 10000 D, and the density is 2 fibers / c.
Silica sand having a diameter of 2 mm or less was sprayed on m ² of artificial grass. At this time, by adjusting the positions of the sleds 22a and 22b,
The outer circumference of the rotating brush 21 was set to be higher than the filling sand surface by about 3 mm, and the condition was such that the amount of sand sprayed once was about 3 mm. As a result, 35 kg / m ² of sand could be evenly distributed in the grass of the artificial grass by spraying about 8 to 10 times.

On the other hand, by the conventional spraying device which adjusts the position or pressure of the rotating brush with the turnbuckle on the basis of the trolley, the outer circumference of the rotating brush is set to be about 3 mm higher than the filling sand surface. When the same silica sand was sprayed on the same artificial grass in the same manner at the same spraying amount per time, it was possible to fill the sand almost smoothly up to about 5 times, but when the state where the setting was not changed was continued. In addition, the sand that had once been filled was scraped out again by the rotating brush as the amount of filled sand increased. Therefore, the position of the rotary brush was gradually shifted upward as the amount of sand filled increased, but the adjustment work was extremely difficult, and the sand was sprayed equally as in the embodiment of the present invention. I couldn't do that.

The present invention is not limited to the above-mentioned respective embodiments, and for example, the vertical adjusting mechanism of the sled can adopt another known mechanism. Further, although the pair of left and right arms are individually swingably supported on the carriage in the above-mentioned embodiments, they may be swingably supported on the carriage after being integrated at the root portion. Further, as the warp, in addition to a normal warp having a flat bottom surface, a warp provided with a plurality of rollers in the longitudinal direction can be adopted in order to reduce friction with the ground contact surface.

It is also conceivable to use a single roller in place of the sled in order to regulate the position of the arm with respect to the running surface, but in this case, minute irregularities on the running surface are sensed and There is a drawback in that the sand cannot be taken in well in the convex portion of the sand that has locally dropped in a large amount.

[0022]

As described above, according to the present invention, the rotary brush is separated from the carriage, and the pair of arms swingable with respect to the carriage support the bearing portions at both ends thereof, and the arms are respectively supported by the arms. Is equipped with a sled that contacts the traveling surface of the bogie and a mechanism for adjusting the vertical position with respect to the arm of each sled, so the rotating brush is always based on the sled, and therefore the traveling surface (surface of artificial grass) The height position of the turf is regulated on the basis of, and even if there is vertical movement of the trolley during traveling, it is not affected, maintaining a certain positional relationship or pressure with respect to the surface layer of the artificial turf, and the sled is Since it is grounded at a predetermined distance, even if there is fine unevenness on the spraying surface, it is not affected, just by adjusting the position of the sled at the beginning, readjustment as the sand filling amount increases Without doing Compared with the conventional method, it is possible to make the spraying even and flat.

[Brief description of drawings]

FIG. 1 is a side view showing the overall configuration of an embodiment of the present invention.

FIG. 2 is a plan view thereof.

FIG. 3 is an enlarged view of the vicinity of the sled 22a of FIG.

FIG. 4 is an operation explanatory view of the sleds 22a and 22b according to the embodiment of the present invention.

FIG. 5 is an explanatory view of the operation of the sleds 22a and 22b.

FIG. 6 is an enlarged view of the vicinity of the sled according to another embodiment of the present invention.

FIG. 7 is an explanatory diagram of a problem of a sand spraying device using a conventional rotating brush.

[Explanation of symbols]

 1 ... ・ Bogie 11 ・ ・ ・ ・ Front wheel 12 ・ ・ ・ ・ ・ ・ Rear wheel 13 ・ ・ ・ ・ Body frame 14 ・ ・ ・ ・ Engine 15 ・ ・ ・ ・ Hydraulic unit 17 ・ ・ ・ ・ ・ ・ Hopper 20a, 20b ・ ・・ ・ Arm 201 ・ ・ ・ ・ Bracket 202 ・ ・ ・ ・ ・ ・ Prevention bracket 21 ・ ・ ・ ・ Rotating brushes 21a, 21b ・ ・ ・ ・ Bearing 22a, 22b ・ ・ ・ ・ Sledding 221 ・ ・ ・ ・ Support shaft 222 ・ ・..Pins 223 .... Position adjusting nuts 224 .... Fixing nuts

Claims (1)

(57) [Claims] 1. A trolley that moves on artificial turf is loaded with a hopper that contains sand for spraying, and is behind the hopper in the traveling direction of the trolley, and is orthogonal to the traveling direction of the trolley. In a device provided with a rotating brush having a rotating shaft in a direction, a pair of left and right arms swingable around a horizontal shaft are arranged at the rear portion of the carriage, and the bearing portions at both ends of the rotating brush are provided with the arms. A pair of left and right sleds, which are supported by the arms and are in contact with the traveling surface of the bogie, and a mechanism for adjusting the vertical position of the sleds with respect to the arms are provided near the bearings of the arms. A sand leveling / spraying device characterized in that