JPH08242710A - Water sprinkling device for field - Google Patents

Abstract

PURPOSE: To provide a water sprinkling device for a field, capable of reducing an initial cost and a running cost, being freely laid and finely set correspondingly to a small zone, without causing obstacle in a field, in a water sprinkling device for a field such as a turf field. CONSTITUTION: This water sprinkling device for a field is equipped with a mobile water sprinkling head 9 which is in a relatively deeply buried state under the field when it is not used and rises from the field to the surface of the ground by pushing its way through the underground and sprinkles water in a state of being on the ground. The top of the water sprinkling head 9 is provided with a mobile head cover 11 for pushing its way through the underground and rising above the water sprinkling head 9 when water sprinkling. The water sprinkling head 9 and the head cover 11 are of a hydraulic operation type working in the vertical direction by hydraulic action.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sprinkler for a field such as a turf field.

[0002]

2. Description of the Related Art In a turf field such as a soccer field in which turf grass is planted, water is sprayed on the turf grass manually or by a sprinkler. In particular, since the turf field is wide, sprinklers are often provided, that is, many rain gun type sprinklers are installed in the turf field, and water supply pipes are laid under the turf field.

[0003]

However, in the case of the conventional turf field sprinkling system, the manual sprinkling method by man is troublesome and requires a skilled person.
There was a problem. And, in the case of the rain gun type sprinkler, there are problems as listed below. It is a large-sized, high-pressure type, has a large power, and cannot be installed in a small area. The equipment and cap are exposed on the surface of the turf field, which hinders the competition. The degree of freedom in layout is limited in terms of competition.

Therefore, an object of the present invention is that in a field such as a turf field, there are no obstacles in the field, both the initial cost and the running cost can be kept low, and a free layout and a small installation corresponding to a small range are provided. It is to provide a sprinkler which is capable of.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 is a sprinkler for a field, which is relatively deeply buried in the ground below the field when not in use. The present invention is characterized in that it is provided with a movable sprinkling head which is in a state of being in a state of being, and which is in a state of being floated above the field from the field to sprinkle water by pushing the ground separately during use.

The invention according to claim 2 is the same as claim 1.
In the water sprinkler for a field described above, a movable head cover is provided at an upper portion of the water sprinkling head to push the ground separately and to float above the water sprinkling head at the time of water sprinkling.

Further, the invention according to claim 3 is the same as claim 2
In the field sprinkler described above, the sprinkling head and the head cover are of a hydraulic actuation type that moves vertically by the action of hydraulic pressure.

According to a fourth aspect of the present invention, in the field sprinkler device according to the third aspect, a spring member for urging the water sprinkling head and the head cover in a descending direction is provided, and the spring of the spring member is provided. It is characterized in that the water spray head and the head cover are moved downward when the water pressure is removed by force.

The invention according to claim 5 is the same as claim 3
Alternatively, in the field sprinkler according to the fourth aspect, the head cover has a water ejection port that ejects water upward, and the head cover moves down the ground while the sand ejected by the water ejected from the water ejection port. The feature is that it is configured to push up and rise.

Further, the invention according to claim 6 is the invention according to claim 5.
The water sprinkler for a field described in the above is characterized in that the water ejection port is provided with a sediment intrusion prevention net for preventing invasion of sediment into the inside.

[0011]

According to the invention described in claim 1, when not in use, it is relatively deeply buried in the ground below the field, and when it is in use, the ground is pushed up to float above the field. Since it is a sprinkler equipped with a movable sprinkling head that sprinkles water in a state, there is no sprinkler member in the field when not in use, so there is no hindrance to the competition. In addition, when using it, it is a system that pushes the ground separately and floats the sprinkling head above the ground.Since it can be downsized and low output, the initial cost is lower due to downsizing compared to the rain gun type sprinkler. ,
The low output also reduces the running cost. Therefore, the water sprinkler for the field can be freely laid out and can be installed finely in a small area.

According to the second aspect of the invention, since the movable head cover is provided on the upper part of the sprinkling head, the head cover facilitates the operation of pushing the ground separately and ascending to the ground. After that, at the time of water sprinkling, the head cover floats above the water sprinkling head, and water is sprinkled by the water sprinkling head.

Further, according to the third aspect of the present invention, the water-operated sprinkling head and the head cover are vertically operated by the action of water pressure. Therefore, the sprinkling head is movable by using the water supply pressure supplied to the water sprinkling as it is. Further, both the head cover and the head cover can be operated in the vertical direction, and another drive source is not required separately.

Further, according to the invention of claim 4, since the spring member for urging the sprinkling head and the head cover in the descending direction is provided, the spring force of the spring member causes
The water spray head and head cover can be reliably lowered from the field to the ground when the water pressure is removed.

According to the fifth aspect of the present invention, the head cover has the water ejection port for ejecting water upward, so that the head cover removes soil and sand by the water ejected from the water ejection port. While sweeping away, it easily pushes through the ground and rises.

Further, according to the invention of claim 6, since the head cover is provided with a sediment intrusion prevention net at the water jet outlet,
When not in use, it is buried relatively deep in the ground below the field with the sprinkling head, and the sediment intrusion prevention network prevents the intrusion of sediment from the water ejection port.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a field sprinkler according to the present invention will be described below with reference to FIGS. FIG. 1 and FIG. 2 show the construction of the essential parts of a field sprinkler as a first embodiment to which the present invention is applied.
Shows a state in which the movable sprinkling head and head cover are buried in the ground when not in use, and FIG. 2 shows a state in which the sprinkling head and head cover of FIG. 1 float on the ground to spray water. is there. 1 and 2, 1 is a turf bed, 2 is a turf grass, 3 is a nutrient root, 4 is a water root,
5 is a water supply pipe, 6 is a sprinkling box, 7 is a guide pipe, 8
Is a head pipe, 9 is a sprinkling head, 11 is a head cover, 12 is a rod, and 13 is a water pressure receiving portion.

That is, in the first embodiment, in a turf field in which turfgrass 2 is planted on the entire surface of a turf floor 1 formed by sand (coarse sand, river sand, etc.) or soil in a plurality of layers in the ground, A water supply pipe 5 and a sprinkling box 6 are embedded in the ground of the turf bed 1, particularly at a position deeper than a moisture root 4 longer than the nutrient root 3 of the turf grass 2. Specifically, turfgrass 2
The water sprinkling box 6 connected to the water supply pipe 5 has a length of about 300 mm up to the water root 4 of the turfgrass 2 so as not to interfere with the water root 4. It is buried in a place deeper than the depth. Although not shown, the water supply pipe 5 is connected to a water supply tank and a water supply pump.

A vertical guide pipe 7 is provided so as to penetrate through the upper surface of the sprinkling box 6 described above, and a head pipe 8 is slidably incorporated in the guide pipe 7 in the vertical direction. There is. Here, an appropriate watertight seal structure is adopted between the guide pipe 7 and the head pipe 8 and an appropriate retaining structure is adopted. The head pipe 8 has, for example, a diameter of about 25 mm, and a watering head 9 is fixedly or rotatably provided on the upper surface thereof. When the water sprinkling head 9 is rotatable, an appropriate watertight seal structure is adopted between the head pipe 8 and the water sprinkling head 9. This sprinkling head 9 has one or a plurality of nozzle holes, and in the embodiment, four nozzle holes 10, 10, 10, 10 facing in four directions as shown in FIG.
Is provided.

Further, on the upper part of the above sprinkling head 9,
A head cover 11 is provided. That is, the head cover 11 has a spear-shaped protrusion shape as shown in the figure,
It is possible that the lower surface thereof overlaps the upper surface of the sprinkling head 9. The rod 12 provided on the lower surface of the head cover 11 is slidably assembled to the central portion of the sprinkling head 9, and an appropriate watertight seal structure is adopted between the rod 12 and the sprinkling head 9. The above head cover 11 has a head pipe 8 at the lower end of the rod 12.
Inside, a water pressure receiving portion 13 for receiving a water supply pressure described later is provided.

In the field sprinkler having the above-described component construction, when not in use, the head pipe 8 and the head cover 11 are relatively deeply buried in the ground of the turf bed 1 as shown in FIG. The dimensions of the parts, the dimensions of the sprinkling box 6 and the burying position are preset.
As will be described later, since the water spraying range from the nozzle hole 10 of the water spraying head 9 is of a relatively small range of about 6 to 12 m, it is suitable for such a relatively small range of water spraying capacity. Therefore, a small number of sprinkling boxes 6 are installed to correspond to a small range.

Thus, in the field sprinkler of the present invention, when not in use, as shown in FIG. 1, the sprinkler head 9 is placed in the ground of the turf bed 1 with the head pipe 8 and the head cover 11 overlapping. It is relatively deeply buried, and there is no watering member like the conventional rain gun type sprinkler in the turf field, so there is no concern that it will interfere with the competition. When used for water sprinkling, when water is pumped from the water supply tank to the water supply pipe 5 by the operation of the water supply pump, the water pressure acts on the head pipe 8 in the water sprinkling box 6, and particularly the head pipe 8 Water pressure acts on the lower surface of the water spray head 9 at the upper end, and the head pipe 8 slides in the guide pipe 7 and rises.

When the head pipe 8 is raised, the head cover 11 in a state of being superposed on the sprinkling head 9 at the upper end thereof has a spear-shaped projection shape, so that the head cover 11 pushes the ground to separate the head pipe 8. Will rise. Then, when the head cover 11 floats above the ground, water pressure acts on the water pressure receiving portion 13 at the lower end portion of the rod 12, and the rod 12 slides up in the central portion of the water spraying head 9 to rise, that is, as shown in FIG. The head cover 11 floats upward from the sprinkling head 9.

At the same time, due to the action of water pressure on the lower surface of the sprinkling head 9, the upper part of the head pipe 8 floats above the ground, and as shown in FIG. The upper part of the head pipe 8 is projected, and the nozzle holes 10, 1 of the sprinkling head 9 at the upper end thereof are projected.
Water is jetted from 0, 10, and 10 and sprayed in all directions. The watering range from the nozzle hole 10 of the watering head 9 is about 6 to 12 m. Here, when the water sprinkling head 9 is rotatably assembled to the head pipe 8, the water sprinkling head 9 rotates by utilizing the pressure of the water passing through each nozzle hole 10, and therefore the water sprinkling while rotating is performed. Is done. When the watering is completed, the action of the water pressure is released, so that the operator pushes the head cover 11 to remove the watering head 9 with the head cover 11 overlaid on the head pipe 8 as shown in FIG. The turf bed 1 is buried relatively deep in the ground.

As described above, according to the field sprinkler of the present invention, when not in use, it is relatively deeply buried in the ground of the turf floor 1, and when it is in use, the ground is pushed to float to the ground. The nozzle holes 10, 10, 1
The head cover 1 is provided with a sprinkling head 9 that sprinkles water from 0, 10 in all directions, and pushes the ground into the upper part of the sprinkling head 9 and then floats above the sprinkling head 9.
1 and the water spraying head 9 and the head cover 11 are hydraulically actuated, the following effects can be obtained.

The watering head 9 has a diameter of about 25 mm.
Since the size can be reduced to a certain extent, the initial cost can be suppressed. The water sprinkling head 9 and the head cover 11 are raised by water pressure. Since the water pressure may be low, running costs can be suppressed. Due to the downsizing of the watering head 9, for example, the watering head 9 can be installed in the court, so that turf field zoning can be freely performed. As mentioned above, turf field zoning can be done freely, so fine watering is possible. When not in use, the watering head 9 is relatively deeply buried in the ground of the turf floor 1, and there is no watering member like the conventional rain gun type sprinkler in the turf field. It does not get in the way. As described above, since the turf field can be freely zoned, it becomes possible to freely move the play zone of the competition for lawn curing.

Next, a field sprinkler as a second embodiment to which the present invention is applied will be described with reference to FIGS. 4 to 8. FIG. 4 and FIG. 5 show a main part structure of a field sprinkler device as a second embodiment to which the present invention is applied. First, FIG. 4 shows a movable sprinkler head and a head cover which are buried in the ground. FIG. 5 shows a state when not in use, and FIG. 5 shows a state immediately before the watering head and the head cover of FIG. 4 float on the ground to perform watering. In FIGS. 4 and 5, 41 is a turf bed, 42 is turf grass, 43 is a water supply pipe, 44 is a bottom plate, 45 is an outer cylinder, 46 is an inner cylinder, 47 is a sprinkling head, 48 is a head cover, and 49 is a water jet outlet. , 50 is an inner pipe, 51 is a spring member for the watering head,
Reference numeral 52 denotes a head cover spring member.

That is, in the second embodiment, in a turf field in which grass grass 42 is planted on the entire surface of a grass floor 41 formed by a plurality of layers in the ground such as earth and sand, the grass floor 4
A water supply pipe 43, a bottom plate 44, and an outer cylinder 45 are embedded in the ground of No. 1. Here, the outer cylinder 45 is formed of a vinyl chloride pipe and has an outer diameter of about 60 to 90 mm and a length (height) of about 600 mm, and is integrally erected on the bottom board 44. A water supply pipe 43 is connected to the lower side surface. The outer cylinder 45 is vertically embedded with the upper end surface having a depth of about 200 mm in the ground of the grass floor 41. Although not shown, the water supply pipe 43 is connected to a water supply tank and a water supply pump, and has, for example, a water supply capacity of about 4 to 5 kg / min. A main plug for opening / closing operation is provided at an appropriate position on the water supply pipe 43.

In the central portion of the outer cylinder 45, which is also formed of a vinyl chloride pipe, the outer diameter is about 25.4 to 30 mm.
An inner cylinder 46 of a certain size is slidably incorporated so as to penetrate from above. The inner cylinder 46 is provided with a sprinkling head 47 on the upper end surface, and is set to a length such that the sprinkling head 47 floats above the turf grass 42 and projects to a height of about 100 mm, and the lower end surface is opened. There is. A head cover 48 is provided on the water sprinkling head 47.
Reference numeral 8 is a frusto-conical shape in which the top of the cone is cut, and the upper portion thereof serves as a water ejection port 49. The head cover 48 is supported by an inner tube 50 that is slidably inserted from above into the central portion of the inner cylinder 46 and assembled. The inner pipe 50 is also formed of a vinyl chloride pipe and has an outer diameter of about 10 mm, and the lower end surface is open. Also,
A watering head spring member 51 and a head cover spring member 52 are housed inside the outer cylinder 45.

Specifically, stopper rings 53 and 54 are fixedly provided on the inner circumference of the outer cylinder 45 in the upper and lower sides, respectively, and on the inner circumference surface of the outer cylinder 45 between the upper and lower stopper rings 53 and 54. Piston 55 sliding along
Are fixedly provided on the outer periphery of the lower end portion of the inner cylinder 46. The piston 55 has a piston ring 56 on the outer circumference. In addition, in the central opening of the upper end surface of the outer cylinder 45,
A seal ring 57 that keeps the space between the inner cylinder 46 and the outer peripheral surface watertight.
Is provided. Further, as shown in FIG. 6, an air vent hole 58 is formed in a part of the upper end surface of the outer cylinder 45, and the air vent hole 58 prevents dirt and sand from entering the outer cylinder 45. A fine-grained sand intrusion prevention net 59 is provided for this purpose.

On the lower surface of the piston 55 on the outer periphery of the lower end of the inner cylinder 46, an upper portion of a flexible connecting member 60 such as a rubber film is fixedly provided, and the center of the connecting member 60 is provided. The sprinkling head spring member 51 formed of a tension coil spring is provided between the bottom portion and the central portion of the bottom board 44.
Has been installed. Although not shown, the connection member 60 is provided with a water passage having an appropriate opening for circulating water inside and outside thereof. Further, on the outer periphery of the lower portion of the inner cylinder 46,
Water distribution openings 61, 62 are formed by dividing the upper and lower layers into appropriate openings by an appropriate opening such as a porous portion for circulating water.

Further, a stopper ring 63 is fixedly provided on the inner circumference of the lower end portion of the inner cylinder 46, and
A stopper ring 64 is also fixedly provided on the inner circumference between the water circulation openings 61 and 62. Further, a flange 65 that vertically moves in the inner cylinder 46 between the upper and lower stopper rings 63 and 64 is fixedly provided on the outer periphery of the lower end portion of the inner pipe 50. The head cover spring member 52 formed of a tension coil spring is provided between the central portion of the flange 65 and the central bottom portion of the connecting member 60. The tension spring force of the head cover spring member 52 is set to be weaker than the tension spring force of the sprinkling head spring member 51.

Then, the sprinkling head 4 at the upper end of the inner cylinder 46
7 includes a plurality of nozzle holes 6 as shown in FIG.
6, 66 are formed. The nozzle hole 66 is formed obliquely from the center side of the inner cylinder 46 toward the outer peripheral side, and the inclined surface on the center side and the inclined surface on the outer peripheral side of the spouted water are far, medium and short distances. It is formed with different angles so as to diffuse and scatter. In the example shown in FIG. 8, the sprinkling head 47 has eight nozzle holes 66, 66, 6
, 66, ... Are formed at equal intervals. Although not shown, the nozzle holes 66 facing the eight directions are formed so as to be inclined in a certain direction along the circumferential direction of the sprinkling head 47. Therefore, when water is ejected from each of the nozzle holes 66 that face the eight directions, the inner cylinder 4 that is integral with the sprinkling head 47 is formed.
6 rotates in a fixed direction.

Further, at the upper end of the inner pipe 50, as shown in FIG.
As shown in FIG. 3, the enlarged diameter portion 67 having a larger diameter is formed, and the flange 68 is formed on each diameter portion 67. A water ejection port 69 is formed at the center of the flange 68. Further, in the expanded diameter portion 67, a valve body 70
Is accommodated, and a rod 71
Has been erected. The water jet port 49 at the upper part of the frustoconical head cover 48 has the water jet port 49.
A fine sand / sand intrusion prevention net 72 is provided to prevent intrusion of earth / sand into the ground. The upper end of the rod 71 is fixedly connected to the center of the earth and sand intrusion prevention net 72.

The second aspect of the present invention having the above-described component structure
In the field sprinkler according to the embodiment, when not in use, as shown in FIG. 4, the inner cylinder 46 is caused by the pulling force of the sprinkling head spring member 51, and the inner tube is caused by the pulling force of the head cover spring member 52. 50 are buried relatively deep in the ground of the turf bed 41, respectively, and are about 200
Head cover 49 on the watering head 47 at a depth of about mm.
Are overlapping. The head cover 49 is filled with earth and sand. At this time, the piston 55
Is in a state of overlapping on the lower stopper ring 53, and the flange 65 is also in a state of overlapping on the lower stopper ring 63. Then, in the case of using for water sprinkling, the main plug is opened and the water supply to the water supply pipe 43 is started. Due to the passage of water to the water supply pipe 43, water flows into the bottom portion of the outer cylinder 45, water pressure acts on the lower surface of the piston 55, and the bottom surface of the inner cylinder 46 extends from the water passage of the connecting member 60. Water flows in from the opening of the above, and water pressure also acts on the lower surface of the flange 65.

Therefore, the inner cylinder 46 integral with the piston 55 that receives water pressure rises against the tensile force of the sprinkling head spring member 51. Further, the water that has flowed into the bottom portion of the inner pipe 50 from the opening of the lower end surface rises, and the water flows in the enlarged diameter portion 67 of the upper end portion of the inner pipe 50 as shown by the dotted line in FIG. Of the head cover 48, which is in contact with the flange 68 under the weight of, and passes through the outer peripheral side of the integral valve body 70 via the earth and sand protection net 72 and the rod body 71, and upward from the water ejection port 69 in the central portion of the flange 68. Gush out. Then, the water ejected from the water ejection port 69 is transferred from the water ejection port 49 at the upper part of the frustoconical head cover 48 to the sediment intrusion protection net 72.
It jets out like a jet jet.

As described above, while the earth and sand are being washed away by the water jet ejecting from the water jet outlet 49 in the upper part of the frustoconical head cover 48 like a jet jet, as described above, the head cover 49 is placed on the sprinkling head 47. In the overlapping state, the inner cylinder 46 and the inner pipe 50 are integrally lifted by water pressure, and at that time, the head cover 48 is lifted with the frustoconical shape of the frustoconical shape. And the lawn floor 41
And through the turf grass 42 and rising, the head cover 48
Since the resistance due to the weight of the earth and sand disappears, the valve body 70 is lifted by the water pressure as shown in FIG. 7, the head cover 48 is lifted from the flange 68, and the valve body 70 closes the water ejection port 69. The head cover 4 as described above
The jet of water from the water spout 49 of 8 is stopped.

Further, since the head cover 48 has no resistance due to the weight of earth and sand, the flange 6 which receives water pressure is used.
The inner tube 50 integrated with 5 also rises against the tensile force of the head cover spring member 52, and the upper stopper ring 6
4, the flange 65 abuts on the lower side, and the inner tube 50 is prevented from further rising. After that, as shown in FIG. 5, when the piston 55 abuts below the upper stopper ring 54 by the action of water pressure, the inner cylinder 46 is prevented from further rising. When the inner cylinder 46 reaches the raised position in this way, water exits from the lower water circulation opening 61, which is divided into upper and lower parts of the inner cylinder 46, and once enters the upper chamber of the outer cylinder 45. , The nozzle holes 66, 66, 66, 66 of the sprinkling head 47 on the upper end surface of the inner cylinder 46 are reentered into the inner cylinder 46 through the upper water circulation opening 62.
Water is spouted from the outside into the open air.

At the time of this water sprinkling, water is jetted from the nozzle holes 66, 66, 66, 66, ... Which are formed inclining in a certain direction along the circumferential direction of the water sprinkling head 47 and face eight directions. Due to the reaction, the inner cylinder 46 integrated with the water sprinkling head 47 rotates in a fixed direction. Further, since the nozzle hole 66 is formed obliquely from the center side of the inner cylinder 46 toward the outer peripheral side, and the inclined surface on the center side and the inclined surface on the outer peripheral side are formed at different angles, the ejection is performed. Water is far
Disperses and scatters in medium and short distances. Therefore, it is possible to perform effective water spraying in which the water spray head 47 rotates in a fixed direction and diffuses and scatters in long distances, middle distances, and short distances.

After the desired watering, the main plug is closed. If the main stopper is closed, the outer cylinder 45, the inner cylinder 46, the inner pipe 5
Since the water pressure inside 0 disappears,
As shown in FIG. 4, the inner cylinder 46 is moved to the head cover spring member 5 by the tensile force of the sprinkling head spring member 51.
The inner pipe 50 returns to a state where it is relatively deeply buried in the ground of the turf bed 41 by the tensile force of 2, and returns to a state where the head cover 49 overlaps the sprinkling head 47 at a depth of about 200 mm. Then, the head cover 49 is backfilled with earth and sand.

In the above embodiments, the water sprinkler for the turf field was used, but the present invention is not limited to this and can be used as a water sprinkler for the field in which no grass is planted. is there. In the embodiment, the movable sprinkler head and head cover are hydraulically actuated, but may be mechanically actuated or hydraulically actuated. Further, such movable sprinkling heads and head covers may have any shape, and in addition, specific detailed structures such as the number of nozzle holes may be appropriately changed.

[0042]

As described above, according to the field sprinkler apparatus of the first aspect of the present invention, the movable sprinkler head, which is relatively deeply buried in the ground when not in use, is It is constructed so that water is sprinkled as it floats on the ground by pushing the ground separately, and there is no water sprinkling member in the field when not in use, so there is an advantage that it will not hinder the competition. You can In addition, when using it, it is a method of pushing the ground separately to float the sprinkling head above the ground.Since it can be downsized and low output, the initial cost is lower due to downsizing compared to the rain gun type sprinkler. In addition, the running cost can be reduced due to the low output. Therefore, the water sprinkler for the field can be freely laid out and can be installed finely in a small area.

According to the field sprinkler of the second aspect of the present invention, the movable head cover provided on the upper part of the sprinkling head can easily perform the operation of pushing the ground separately and ascending to the ground. Moreover, at the time of water sprinkling, the head cover floats above the water sprinkling head, so that water sprinkling by the water sprinkling head can be performed.

Further, according to the field sprinkler of the third aspect of the present invention, since the water sprinkling head and the head cover are hydraulically actuated to operate in the vertical direction by the action of water pressure, the water supply pressure supplied to the water sprinkler is unchanged. Both of the movable sprinkling head and the head cover can be moved vertically by utilizing the advantage, and an advantage that another drive source is not required separately can be obtained. Therefore, it can contribute to energy saving.

According to the field sprinkler of the fourth aspect of the present invention, since the sprinkling head and the head cover are biased downward by the spring member, the sprinkling head is used in a state where the water pressure is eliminated by the spring member. Also, the head cover can be reliably lowered from the field to the ground.

According to the field sprinkler of the fifth aspect of the present invention, since the head cover is provided with the water jet port for jetting water upward, the water spouted from the water jet port scavels earth and sand. The head cover can easily push up the ground and rise while being swept away.

Further, according to the field sprinkling apparatus of the sixth aspect of the present invention, since the sediment intrusion prevention net is provided at the water spray outlet of the head cover, this head cover together with the sprinkling head is relatively deep in the ground below the field. In the buried non-use state, the sediment intrusion prevention net can reliably prevent the intrusion of sediment from the water ejection port into the inside of the head cover.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a configuration of a main part of a field sprinkler as a first embodiment to which the present invention is applied, showing a movable sprinkler head and a head cover in a state of being buried in the ground when not in use. It is a side view.

FIG. 2 is a vertical cross-sectional side view showing a use state in which the sprinkling head and the head cover of FIG. 1 float on the ground to sprinkle water.

FIG. 3 is a plan view showing a configuration example of nozzle holes of a watering head.

FIG. 4 is a longitudinal sectional view showing a configuration of a main part of a field sprinkler as a second embodiment to which the present invention is applied, showing a movable sprinkler head and a head cover in an underground state when not in use. It is a side view.

5 is a vertical cross-sectional side view showing a state immediately before the water sprinkling head and the head cover of FIG. 4 float on the ground and sprinkle water.

6 is a plan view showing the configuration of an air vent portion on the upper end surface of the outer cylinder of FIG.

FIG. 7 is a vertical cross-sectional side view of essential parts showing an enlarged use state in which the head cover of FIG. 5 further floats and water is sprayed by the water spray head.

8 is a cutaway plan view showing the structure of a water spraying head at the upper end of the inner cylinder by breaking the inner pipe along the line AA in FIG.

[Explanation of symbols]

 1 Turf bed 2 Turf grass 3 Nutrient root 4 Moisture root 5 Water supply pipe 6 Sprinkling box 7 Guide pipe 8 Head pipe 9 Sprinkling head 10 Nozzle hole 11 Head cover 12 Rod 13 Water pressure receiving part 41 Turf bed 42 Turf grass 43 Water supply pipe 44 Bottom plate 45 Outer cylinder 46 Inner cylinder 47 Water sprinkling head 48 Head cover 49 Water jet 50 Inner pipe 51 Spring member for water sprinkling head 52 Spring member for head cover 53, 54 Stopper ring 55 Piston 56 Piston ring 57 Seal ring 58 Air vent hole 59 Sediment intrusion protection net 60 Connection Member 61,62 Water circulation opening 63,64 Stopper ring 65 Flange 66 Nozzle hole 67 Expanded portion 68 Flange 69 Water jet 70 Valve body 71 Rod 72 Sediment intrusion prevention net

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukihiro Sakuda 2-10-10 Fujimi, Chiyoda-ku, Tokyo Inside Maeda Construction Industry Co., Ltd. (72) Yasuyuki Uehara 2-1026 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd. (72) Hiroshi Minami 2-10-26 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd. (72) Hiroyuki Oku 2-42-33 Ogikubo, Suginami-ku, Tokyo (72) Kenichiro Kashiwagi, 5-1,29 Nishitsuga, Wakaba-ku, Chiba, Chiba Prefecture (72) Inventor, Masatoshi Fujiyoshi 2--10, Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd.

Claims (6)

[Claims] 1. A sprinkler device for a field, which is relatively deeply buried in the ground below the field when not in use, and is pushed out of the field by pushing the ground when used. A water sprinkler for a field, which is equipped with a movable water sprinkling head for sprinkling water while floating on the ground. 2. The field according to claim 1, wherein a movable head cover is provided on an upper portion of the water sprinkling head for pushing the ground separately and floating above the water sprinkling head during water sprinkling. Sprinkler for water. 3. The water sprinkler for a field according to claim 2, wherein the water sprinkling head and the head cover are hydraulically actuated ones that vertically move under the action of water pressure. 4. A spring member for urging the water spray head and the head cover in a descending direction is provided, and the spring force of the spring member causes the water spray head and the head cover to descend when the water pressure is lost. The water sprinkler for a field according to claim 3, wherein 5. The head cover has a water ejection port for ejecting water upward, and the head cover pushes up the ground by pushing the soil away from the water ejected from the water ejection port. The field sprinkler according to claim 3 or 4. 6. The water sprinkler for a field according to claim 5, wherein the water ejection port is provided with a sediment intrusion prevention net for preventing invasion of sediment into the inside.