JP2010188284A - Pop-up sprinkler - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pop-up sprinkler including a nozzle member having improved mobility. <P>SOLUTION: The pop-up sprinkler 1 includes an outer cylinder 2 and a nozzle member 3 inserted in the outer cylinder 2 in a manner protrudable from the outer cylinder 2. In the outer cylinder 2, a diaphragm 9 is disposed in a manner of dividing the inner space of the outer cylinder 2 into two chambers, and the diaphragm 9 is fixed to the nozzle member 3. If water is supplied into a water supply chamber 12, the water pressurizes the diaphragm 9, whereby the diaphragm 9 causes the nozzle member 3 to move upward to protrude the nozzle member 3 from the outer cylinder 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a pop-up sprinkler.

  When sprinklers are installed in places where a large number of unspecified people go, such as on the road or in the open space, the nozzles are stored when not in use to prevent accidents and mischief so that they are not as noticeable as possible when not in use. In general, a pop-up sprinkler in which the nozzle portion slides upward only when in use is used. Pop-up sprinklers are only noticeable when in use, so they not only prevent accidents and mischief, but can also prevent the appearance of the installation location from being impaired.

  Such conventional pop-up sprinklers are described in Patent Documents 1 and 2, for example. In such a pop-up sprinkler, a nozzle portion slidably inserted into an outer cylinder is moved up and down by water pressure and a coil spring.

JP 2005-161137 A JP 2006-281147 A

  However, in the conventional pop-up sprinkler configuration, the nozzle portion is generally elongated, and its cross-sectional area is not so large, so that it is difficult to raise the nozzle portion sufficiently when the water pressure is low. There was a problem.

  The present invention has been made to solve such problems, and an object of the present invention is to provide a pop-up sprinkler in which the moving ability of the nozzle portion is enhanced.

The pop-up sprinkler according to the present invention includes an outer cylinder, a nozzle portion that is inserted into the outer cylinder so as to be able to protrude from the outer cylinder and that sprays a spray liquid, and the interior of the outer cylinder is divided into two chambers and the nozzle A diaphragm fixed to a section, and when the spray liquid is supplied to one of the two chambers, the spray moves the nozzle to move the nozzle section by applying pressure to the diaphragm. Then, the nozzle portion is protruded from the outer cylinder.
A spring member is provided in a chamber opposite to the chamber to which the spray liquid is supplied, and one end of the spring member is directly or indirectly connected to the diaphragm or the diaphragm is connected by the spray liquid. When the pressure is applied, the diaphragm may be directly or indirectly brought into contact with the diaphragm, and the other end may be connected to the inner wall of the chamber provided with the spring member.
The spring member may have a shape in which a radius increases or decreases from the one end toward the other end.
The nozzle part includes an inner nozzle having an upper end surface and a lower end surface, and having a flow path penetrating from the upper end surface to the lower end surface, and an outer nozzle having a shape in which the lower end is open and the upper end is closed. An insertion hole into which the inner nozzle can be inserted is formed from the lower end toward the upper end, and a side surface of the outer nozzle is provided with an outer nozzle having a spray opening communicating with the insertion hole, The outer nozzle may be fixed to the inner nozzle such that the inner nozzle is inserted into the insertion hole so that the direction of the spraying opening can be changed with respect to the longitudinal axis of the nozzle portion.

  According to the present invention, the diaphragm receiving the pressure of the spray liquid moves the nozzle part and causes the nozzle part to protrude from the outer cylinder, so that the area receiving the pressure of the spray liquid increases, so the moving ability of the nozzle part is increased. Can be increased.

It is sectional drawing of the pop-up sprinkler which concerns on embodiment of this invention, Comprising: It is sectional drawing of the state in which the nozzle part does not protrude from an outer cylinder. In the pop-up sprinkler which concerns on this embodiment, it is sectional drawing for demonstrating the method to fix a diaphragm to a nozzle part. It is sectional drawing for demonstrating the method to fix an outer nozzle to an inner nozzle in the pop-up sprinkler which concerns on this embodiment. It is sectional drawing of the pop-up sprinkler which concerns on this embodiment, Comprising: It is sectional drawing of the state which the nozzle part protruded from the outer cylinder.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
A cross-sectional view of a pop-up sprinkler according to an embodiment of the present invention is shown in FIG. The pop-up sprinkler 1 includes an outer cylinder 2 and a nozzle portion 3 inserted into the outer cylinder 2 so as to protrude from the outer cylinder 2. FIG. 1 shows a state in which the nozzle portion 3 does not protrude from the outer cylinder 2.

  The outer cylinder 2 is configured by combining an upper case 4 and a lower case 5. The upper case 4 has a cup-like shape in which the upper surface 4a is closed and the lower surface is opened, and the upper surface 4a has a protruding hole 6 into which the nozzle portion 3 is inserted. A vent hole 7 is formed in the cylindrical side surface portion 4b. The lower case 5 has a shape having two concentric bottoms having an opening at the top and different depths, that is, a first bottom 5a and a second bottom 5b, and the center of the first bottom 5a. The supply nozzle 8 is provided in the part.

  The upper case 4 and the lower case 5 are combined so that the lower end of the upper case 4 is inserted into the upper opening of the lower case 5, and a space is formed inside them. A diaphragm 9 made of a liquid impermeable material is provided in the space. The diaphragm 9 is sandwiched between the inner peripheral surface of the cylindrical side surface portion 5 c that extends vertically upward from the outer peripheral edge of the second bottom portion 5 b of the lower case 5 and the outer peripheral surface of the side surface portion 4 c of the upper case 4. In this way, it is fixed in the space. The diaphragm 9 divides the space into two chambers, that is, a nozzle portion accommodation chamber 11 on the upper case 4 side and a water supply chamber 12 on the lower case 5 side.

  The nozzle portion 3 is composed of an outer nozzle 13 and an inner nozzle 14 accommodated in the outer nozzle 13, and is slidably provided in the protruding hole 6. A taper spring 15 that is a spring member is provided in the nozzle portion accommodating chamber 11 so as to surround the periphery of the nozzle portion 3. The taper spring 15 has a truncated cone shape so that the radius decreases from the upper end 15a toward the lower end 15b. The upper end 15 a is connected to the upper surface 11 a of the nozzle portion accommodation chamber 11, and the lower end 15 b is positioned so as to face the washer 28.

  As shown in FIG. 2, the inner nozzle 14 includes a main body portion 21 and a nozzle bolt 22. A penetration path 23 is formed in the main body portion 21 so as to penetrate from the lower surface 21b to the upper surface 21a. The through path 23 includes a first path 23a, a second path 23b, and a third path 23c that are sequentially provided from the lower surface 21b toward the upper surface 21a, and the inner diameters thereof are reduced in this order. On the outer peripheral surface of the main body 21, annular recesses 24 and 25 are formed at positions corresponding to the second path 23 b and the third path 23 c, respectively. Contained.

  The nozzle bolt 22 is composed of a head portion 22a and a shaft portion 22b having a smaller outer diameter than the head portion 22a. The nozzle bolt 22 is formed with a through path 27 that penetrates from the end surface 22a1 of the head portion 22a to the tip surface 22b1 of the shaft portion 22b. Here, when the inner nozzle 14 is configured by combining the main body 21 and the nozzle bolt 22, the upper surface 21 a of the main body 21 constitutes the upper end surface of the inner nozzle 14 and the end surface of the head 22 a of the nozzle bolt 22. 22 a 1 constitutes a lower end surface of the inner nozzle 14, and the through paths 23 and 27 constitute a flow path of the inner nozzle 14.

  A hole 9 a is provided in the center portion of the diaphragm 9. The two washers 28, 28 sandwich the diaphragm 9 from both sides so that the holes of the two washers 28, 28 coincide with the hole 9a, and the shaft portion of the nozzle bolt 22 is inserted into the hole and hole 9a of each washer 28. The diaphragm 9 is fixed to the inner nozzle 14 by inserting 22b and further inserting the shaft portion 22b into the first path 23a.

  As shown in FIG. 3, the outer nozzle 13 includes a cylindrical side surface portion 13b and a disk-shaped upper surface portion 13a provided at the upper end of the side surface portion 13b and having a radius larger than the outer shape of the side surface portion 13b. It is configured. Thereby, the outer nozzle 13 has a shape in which the lower end is opened and the upper end is closed, and an insertion hole 31 is formed from the lower end toward the upper end. The side surface part 13b is provided with a spraying opening 32 so as to be adjacent to the upper surface part 13a. Further, a fixing hole 33 is provided in the side surface portion 13 b at a position below the spraying opening 32. A screw groove is formed on the inner peripheral surface of the fixing hole 33. The fixing screw 34 is inserted into the fixing hole 33 while being screwed into the screw groove, and the tip of the fixing screw 34 is connected to the outer peripheral surface of the inner nozzle 14. The outer nozzle 13 is fixed to the inner nozzle 14 by being brought into contact with the recessed portion 24 formed in the inner nozzle 14. Since the recessed portion 24 has an annular shape along the outer peripheral surface of the inner nozzle 14, the outer nozzle 13 is fixed to the inner nozzle 14 in any direction of 360 ° with respect to the longitudinal axis L of the nozzle portion 3. be able to. As a result, the spray opening 32 can be directed to change in any direction of 360 ° with respect to the longitudinal axis L.

Next, the operation of the pop-up sprinkler according to this embodiment will be described.
When the pop-up sprinkler 1 is not used, the nozzle portion 3 does not protrude from the outer cylinder 2 as shown in FIG. For this reason, by installing the pop-up sprinkler 1 so that the upper surface 4a of the upper case 4 is slightly hidden by the ground, the pop-up sprinkler 1 can be made invisible when not in use. It is possible to prevent the appearance of the place where the

  When spraying water as a spray liquid from the pop-up sprinkler 1, water is first supplied into the water supply chamber 12 through the supply nozzle 8. When the inside of the water supply chamber 12 is filled with water, the water applies pressure to the diaphragm 9, whereby the diaphragm 9 expands toward the nozzle portion accommodation chamber 11. When the diaphragm 9 starts to expand, the lower end 15 b of the taper spring 15 comes into contact with the washer 28, and the diaphragm 9 starts to compress the taper spring 15 through the washer 28. Based on the difference between the expanding force of the diaphragm 9 and the force resisting the compression of the taper spring 15, the diaphragm 9 moves the nozzle portion 3 upward. As a result, as shown in FIG. 4, the nozzle portion 3 protrudes from the protruding hole 6. In the pop-up sprinkler 1, since the entire area of the diaphragm 9 receives the water pressure, the area that receives the water pressure is large. Note that when the diaphragm 9 expands toward the nozzle portion accommodation chamber 11, the air in the nozzle portion accommodation chamber 11 is exhausted through the vent hole 7.

  The water supplied into the water supply chamber 12 expands the diaphragm 9, and at the same time, a part of the water enters the through path 27 of the nozzle bolt 22, and passes through the first path 23a, the second path 23b, and the third path 23c. Sequentially flows, is discharged into the insertion hole 31, and is sprayed from the spray opening 32. As already described, since the spraying opening 32 can be directed in any direction of 360 ° with respect to the longitudinal axis L of the nozzle portion 3, the orientation of the spraying opening 32 is set in a desired direction in advance. By doing so, water can be sprayed from the pop-up sprinkler 1 in a desired direction.

  When the spraying of water from the pop-up sprinkler 1 is stopped, the supply of water to the water supply chamber 12 is stopped. Then, since the diaphragm 9 does not expand, the force against the compression of the taper spring 15 is won, and the lower end 15b of the taper spring 15 starts to push the washer 28 downward. As a result, the diaphragm 9 is pushed toward the water supply chamber 12, and the nozzle portion 3 moves downward along with this, so that the nozzle portion 3 does not protrude from the outer cylinder 2 as shown in FIG. Return.

  In this way, the diaphragm 9 that has received the water pressure moves the nozzle portion 3 upward to cause the nozzle portion 3 to protrude from the outer cylinder 2, so that the area that receives the water pressure is increased, so that the raising ability of the nozzle portion 3 is enhanced. be able to. The diaphragm 9 divides the space in the outer cylinder 2 into two chambers, a nozzle portion accommodation chamber 11 and a water supply chamber 12, so that water does not leak between the outer tube 2 and the nozzle portion 3. Therefore, it is not necessary to provide the pop-up sprinkler 1 with another component as a seal member.

Further, since the tapered spring 15 has a truncated cone shape so that the radius decreases from the upper end 15a to the lower end 15b, when the tapered spring 15 is compressed, circular portions of each pitch of the tapered spring 15 are provided. Are accommodated without overlapping between the circular portions of the upper and lower pitches. As a result, the length of the taper spring 15 is substantially equal to the outer diameter of the metal rod constituting the taper spring 15 when compressed most, so the length of the upper case 4 can be shortened, and the pop-up The size of the sprinkler 1 can be made compact.
In this embodiment, the taper spring 15 has a shape in which the radius decreases from the upper end 15a to the lower end 15b, but has a shape in which the radius increases from the upper end 15a to the lower end 15b. May be.

  Furthermore, since the outer nozzle 13 can be fixed to the inner nozzle 14 in any direction of 360 ° with respect to the longitudinal axis L of the nozzle portion 3, the spraying opening 32 is connected to the longitudinal axis L of the nozzle portion 3. However, by setting the spraying opening 32 in a desired direction in advance, water can be sprayed from the pop-up sprinkler 1 in a desired direction.

In this embodiment, the lower end 15b of the taper spring 15 is positioned so as to face the washer 28. However, the present invention is not limited to this embodiment. It may be connected to the washer 28, that is, indirectly connected to the diaphragm 9 via the washer 28. Further, the diaphragm 9 may be directly opposed to or connected directly to the diaphragm 9 without using the washer 28.
Further, although the upper end 15 a of the taper spring 15 is connected to the upper surface 11 a of the nozzle portion accommodation chamber 11, it may be connected to the side surface of the nozzle portion accommodation chamber 11. In other words, the upper end 15 a only needs to be connected to the inner wall of the nozzle portion accommodation chamber 11.

  DESCRIPTION OF SYMBOLS 1 Pop-up sprinkler, 2 outer cylinder, 3 nozzle part, 11 nozzle part accommodation chamber (opposite side chamber), 11a (nozzle part accommodation chamber) upper surface (inner wall), 12 water supply chamber (one chamber), 13 outer nozzle, 14 inner nozzle, 15 taper spring (spring member), 15a (taper spring) upper end (other end of spring member), 15b (taper spring) lower end (one end of spring member), 21a (main body) upper surface (inner Nozzle upper end face), 22a1 (nozzle bolt head) end face (inner nozzle lower end face), 23, 27 penetration path (distribution path), 31 insertion hole, 32 spraying opening.

Claims (4)

An outer cylinder,
A nozzle part that is inserted into the outer cylinder so as to protrude from the outer cylinder and that sprays the spray liquid;
The inside of the outer cylinder is divided into two chambers and includes a diaphragm fixed to the nozzle part,
When the spray liquid is supplied to one of the two chambers, the spray liquid applies pressure to the diaphragm, so that the diaphragm moves the nozzle section, and the nozzle section is moved from the outer cylinder. Pop-up sprinkler that protrudes. A spring member is provided in a chamber opposite to the chamber to which the spray liquid is supplied;
One end of the spring member is directly or indirectly connected to the diaphragm, or is opposed to be able to directly or indirectly contact the diaphragm when the diaphragm is pressurized by the spray liquid The pop-up sprinkler according to claim 1, wherein the other end is connected to an inner wall of a chamber provided with the spring member.   The pop-up sprinkler according to claim 2, wherein the spring member has a shape in which a radius increases or decreases from the one end toward the other end. The nozzle part is
An inner nozzle having an upper end surface and a lower end surface, in which a flow path penetrating from the upper end surface to the lower end surface is formed;
An outer nozzle having a shape in which a lower end is opened and an upper end is closed, and an insertion hole into which the inner nozzle can be inserted is formed from the lower end toward the upper end, and the insertion hole is formed on a side surface of the outer nozzle. An outer nozzle formed with a communicating spray opening,
The outer nozzle is fixed to the inner nozzle in such a manner that the inner nozzle is inserted into the insertion hole so that the direction of the spraying opening can be changed with respect to the longitudinal axis of the nozzle portion. Item 4. The pop-up sprinkler according to any one of items 1 to 3.

Images