JP2513333Y2 - Sprinkler shaft structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a shaft structure of a sprinkler arranged on a site such as a lawn.

(Prior Art) When water is sprinkled by a sprinkler in a vast site such as a golf course, the sprinkler shaft is preliminarily buried in the soil in a state of being connected to the pipe for water supply in advance, or When necessary, a sprinkler head is attached to the upper end of the sprinkler shaft for use.

However, since the soil is sometimes sown on the lawn to grow grass, the height of the ground surface may rise, and the sprinkler shaft may be embedded. Therefore, in this case, it is necessary to pull up the sprinkler shaft to secure the watering level when the sprinkler is used, but it is difficult to pull up easily because it is connected to the underground pipe.

In addition, for maintenance of golf courses, trucks and heavy equipment may be introduced on the premises, but when the truck or heavy equipment rides on the sprinkler shaft, if the sprinkler shaft does not sink as the ground sinks, the load May concentrate and damage the sprinkler shaft or the piping connected thereto.

(Problems to be solved by the invention) Therefore, the sprinkler shaft can be easily pulled up when the soil surface rises by sowing the soil, and when a large load is applied from above, the pipe in the soil is There is a demand for a sprinkler shaft structure that allows the sprinkler shaft to descend as the ground subsides without affecting.

(Purpose of the Invention) The present invention has been made based on the above circumstances. The shaft itself can be expanded and contracted without moving the connecting portion with the pipe, and when the load is applied to the upper end of the sprinkler shaft, the shaft shrinks. It is intended to provide a sprinkler shaft structure that is made to be elongated.

(Means for Solving the Problems) Therefore, in the present invention, as is clear from the illustrated embodiment, the sprinkler head is provided with the sprinkler head at the top of the vertically standing sprinkler shaft or its extension. In the above shaft structure, the sprinkler shaft is composed of an outer cylinder 4 and an inner cylinder 5 having a structure in which the upper cylinder is fitted to the outer cylinder 4 so as to be movable in the axial direction through a liquid-tight structure and the upper end portion is projected above the outer cylinder 4. To be done. Outer cylinder 4
Is an outer cylindrical body 4a to which a pipe 2 for supplying water is connected to a lower end portion, and an inner cylindrical body 4b inserted into the outer cylindrical body 4a by screwing so as to be vertically movable. Composed of and. The inner cylinder 5 is provided between the flange 5b formed on the outer circumference of the inner cylinder 5 and the flange 14 formed on the inner circumference of the inner cylinder 4b inside the inner cylinder 4b. It is characterized in that it is elastically held upward with respect to the outer cylinder 4 via a spring 15.

(Operation) Therefore, when the ground surface becomes high due to the spreading of the soil and the like, the inner cylindrical body 4b is screwed upward with respect to the outer cylindrical body 4a forming the outer cylinder 4, and the sprinkler is rotated. The shaft 1 is extended as a whole. Further, when a sprinkler is stepped on by introducing a tractor, heavy equipment, etc., a load is applied to the upper end of the inner cylinder 5, but the inner cylinder 5 is a cylindrical body inside the outer cylinder 4 while compressing the spring 15 by this load.
By being pushed into 4b, the sprinkler shaft 1 is reduced as a whole. Therefore, the sprinkler shaft 1 or the pipe connected to the sprinkler shaft 1 is not damaged.

(Embodiment) An embodiment of the present invention will be specifically described below with reference to FIGS. 1 and 2. In the figure, reference numeral 1 is a sprinkler shaft that is vertically erected in the soil, and is connected to a pipe for supplying water, for example, a pipe 2 made of a flexible tube, at its lower end in the soil. Has become. A sprinkler head 3 which is swung by hydraulic pressure is attached to the upper end of the sprinkler shaft 1.

The sprinkler shaft 1 is composed of an outer cylinder 4 and an inner cylinder 5 that is fitted in the outer cylinder 4 so as to be slidable in the axial direction. A sealing member for forming a dense structure, for example, an O-ring 6 is provided. The O-ring 6 is arranged in an annular groove 7 formed on the outer periphery of the lower end of the inner cylinder 5, and its outer peripheral edge is in sliding contact with the inner peripheral surface on the outer cylinder 4 side.

The outer cylinder 4 is a pair of outer cylindrical bodies 4a fitted inside and outside.
And an inner tubular body 4b, and an outer tubular body 4a.
A joint pipe 8 is connected to the lower end of the pipe 2, and a pipe 2 made of a flexible tube is connected to the joint pipe 8. Further, the outer cylinder 4 has an inner cylindrical body 4b inside the outer cylindrical body 4a.
While being slidably fitted through the ring 11, a male screw 18 formed on the outer periphery of the inner tubular body 4b is screwed into a female screw 17 formed on the upper end of the inner periphery of the outer tubular body 4a. It has a different structure. Therefore, the outer cylinder 4 can be expanded or contracted by turning the inner cylinder 4b with respect to the outer cylinder 4a.

A cap 12 is screwed onto the inner periphery of the upper end of the outer cylindrical body 4a, and the O-shaped groove is inserted into the groove of the inner periphery of the cap 12.
The ring 11 is interposed. Further, a flange 5b functioning as a spring seat is formed on the outer circumference of the inner cylinder 5, and a flange 14 functioning as a spring seat is formed on the tubular body 4b inside the outer cylinder 4 correspondingly. I am doing it.
These flanges 5b and 14 are in the form of arcuate pieces that are divided in the circumferential direction so that they can pass through the notch grooves of each other. A compression coil spring 15 is interposed between the flanges 5b and 14 to hold the inner cylinder 5 upward with respect to the outer cylinder 4.

The upper end of the inner cylindrical body 4b is provided with an annular cap 16 as a stopper for preventing the inner cylinder 4 from coming off.
Are screwed together.

In such a structure, when the sprinkler shaft 1 is embedded in the soil, the soil is spread, and when the ground surface rises from GL1 to GL2, the cap 12 is loosened and the outer cylindrical body 4a is attached. On the contrary, the inner tubular body 4b is screwed up and pulled up,
When the predetermined level is reached, the outer cylinder 4 can be expanded by tightening the cap 12 again, and the sprinkler shaft 1 is substantially expanded (see FIG. 2).

Also, when a tractor or heavy equipment is introduced into the site, onto the sprinkler head 3, or onto the upper end of the sprinkler shaft 1 when it is detached, when these are ridden, as the ground sinks, the above-mentioned inner cylinder Although a large vertical load is applied to 5, the inner cylinder 5 is sunk into the outer cylinder 4 by the compression of the spring 15 at this time, and the sprinkler shaft 1 is contracted. For this reason, the tractor,
Even if the heavy equipment gets on, the structure of the sprinkler shaft is not damaged.

Since the material used here is buried in the soil, stainless steel, synthetic resin, or the like, which does not cause rust, is suitable.

(Effect of the device) The tip portion of the sprinkler shaft according to the present invention is
As described above, the outer cylinder 4 and the inner cylinder 5 elastically held upward by the spring 15 with respect to the outer cylinder 4 are connected, and the outer cylinder 4 is connected to the pipe 2 for supplying water to the lower end portion. The outer tubular body 4a and the inner tubular body 4b inserted into the outer tubular body 4a by screwing so as to be movable up and down, and inside the inner tubular body 4b. Since the inner cylinder 5 has been held by bouncing, when the soil surface is also sown to raise the ground surface, the inner tubular body 4b with the inner cylinder 5 held is replaced by the outer tubular body 4a.
By screwing upward with respect to, the degree of protrusion of the sprinkler head 3 at the upper end of the inner cylinder 5 from the ground can be adjusted without affecting the pipe 2 in the soil.

Further, when a weight is applied to the sprinkler head 3, the inner cylinder 5 sinks and absorbs the weight.
Only descends against the inner cylindrical body 4b against the spring 15, and in this case also does not affect the pipe 2 in the soil.

In this way, when adjusting the vertical position of the inner cylinder 5 having the sprinkler head 3 at the upper end or when the inner cylinder 5 lowers unexpectedly, it does not affect the pipe 2 for supplying water. Alternatively, there is an effect that no additional force is applied from the bottom when the descent is suddenly performed, which is efficient, and the adjustment work becomes easy.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention,
FIG. 2 is a vertical sectional front view in a laid state. 1 ... Sprinkler shaft, 2 ... Piping, 3 ... Sprinkler head, 4 ... Outer cylinder, 4a ... Outer cylinder, 4b ... Inner cylinder, 5 ... Inner cylinder, 6 ... O-ring, 15 ... Spring.

Claims (1)

(57) [Scope of utility model registration request] 1. A shaft structure of a sprinkler having a sprinkler head at the top of a vertically standing sprinkler shaft or an extension thereof, wherein the sprinkler shaft has an outer cylinder (4) and a liquid-tight structure interposed therebetween. And an inner cylinder (5) having a structure in which the upper end of the outer cylinder (4) is inserted so as to be movable in the axial direction and protrudes above the outer cylinder (4). The outer cylinder (4) supplies water to the lower end. The outer tubular body (4a) to which the pipe (2) is connected, and the outer tubular body (4a)
a) and an inner tubular body (4b) inserted by screwing into the inside of the inner tubular body (4b) so as to be movable up and down. The outer cylinder via a spring (15) provided between a flange (5b) formed on the outer circumference of (5) and a flange (14) formed on the inner circumference of the inner cylindrical body (4b). (4)
The shaft structure of the sprinkler is characterized in that it is elastically held upward with respect to.