JP2000136894A - Structure for installing nozzle or branch connecting pipe onto fluid piping - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mount/dismount a nozzle or a branch connecting pipe on/from a fluid piping through one-step operation by forming an elastic engaging part on the nozzle or the branch connecting pipe, and engaging the elastic engaging part with an opening edge of an inside opening of a penetrating hole formed on a circumferential wall of the fluid piping. SOLUTION: In the case where a nozzle 7 is attached on a main body 6, an engaging elastic flanges 16a, 16b of an elastic engaging part abut on an opening edge of an outside opening of a penetrating hole 9. When the nozzle 7 is pushed into the penetrating hole 9, a width of each deforming slit 18 is narrowed, and the elastic flanges 16a, 16b are deformed. When the elastic engaging part is pressed into the penetrating hole 9, engaging claws 16a', 16b' of the elastic flanges 16a, 16b are protruded inward the main body 6. As a result, the elastic flanges 16a, 16b are elastically restored in an original condition, and the engaging claws 16'a, 16b' are engaged with the opening edge of the inside opening of the penetrating hole 9. By this engagement, a fitting part 15 is tightly fitted to an inner wall surface of the penetrating hole 9 and an O-ring 17 fitted in a groove for a ring of a fitting-in part is elastically pressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention sprays liquids such as irrigation, control water, liquids such as chemicals or liquid fertilizers necessary for cultivation of various plants, or gases such as gas for promoting photosynthesis, that is, liquids such as liquids and gases. The present invention relates to a structure for attaching a nozzle or a branch connecting pipe for connecting a hose or the like to a fluid pipe.

[0002]

2. Description of the Related Art Conventionally, in the cultivation of various plants, especially in greenhouses, various spraying liquids such as water, chemicals or liquid fertilizers are sprayed. Usually, as shown in FIG. 25, the spraying is performed by pumping the spraying liquid. It is performed by spraying from a sprayer 2 arranged at a predetermined interval on a pipe 1.

The sprayer 2 is formed by attaching a plurality of, for example, four nozzles 3 made of the same metal to the peripheral wall of a metal main body 2a formed in a cylindrical shape at a constant angular interval. T connected between supply pipes 1, 1
It is attached to a pipe piece 4 of a mold via a relay pipe 5.

The main body 2a and the nozzles 3 are connected to nozzle screw holes 2b formed at a constant angular interval on the peripheral wall of the main body 2a.
The screw 3 (not shown) formed in the nozzle 3 is attached by screwing.

[0005]

However, in the above conventional sprayer 2, the nozzle 3 is formed in the main body 2a and the screw portion is formed in the nozzle 3 in order to mount the nozzle 3 on the main body 2a. And the processing is cumbersome and time-consuming, resulting in high costs.

In order to assemble the sprayer 2, the main body 2
The screw portion of the nozzle 3 must be screwed into each of the nozzle screwing holes 2b of a, and the assembling work is also complicated. Further, since the main body 2a and the nozzle 3 are made of metal, there is a disadvantage that the weight is easily increased.

Accordingly, the present invention provides a method of attaching a nozzle or a branch connection pipe to a fluid pipe without threading both of them, and attaching and detaching the nozzle and the branch connection pipe to and from the fluid pipe with one touch. It is an object of the present invention to provide a structure for attaching a nozzle or a branch connection pipe to a fluid pipe, which can be manufactured by using a synthetic resin and can be reduced in weight.

[0008]

According to the present invention, there is provided a structure for mounting a nozzle or a branch connection pipe to a fluid pipe according to the present invention. And a resilient engaging portion formed on the nozzle or the branch connection pipe inserted from above.

As the nozzle or the branch connection pipe, a large-diameter portion which engages with the rim of the outer opening of the through hole, a ring fitting portion in which an O-ring which presses against the inner wall of the through hole is fitted, and A configuration in which the engagement portion is formed integrally can be provided.

[0010] Further, the body comprises a cylindrical body having an inner space formed therein, and a nozzle tip inserted in the inner space. The large diameter portion, the ring fitting portion and the elastic engaging portion are provided in the body. A groove is formed in the formed body, or a cylindrical body in which an inner space is formed, and a liquid blowing hole communicating with the inner space is formed through the bottom of the groove, and the large diameter portion is formed in the body. , A ring insertion portion and an elastic engagement portion may be formed.

It is preferable that the elastic engaging portion has a structure in which the elastic engaging portion has a plurality of engaging elastic flanges formed with the deformation slit as a boundary. Further, a fitting portion having an outer diameter capable of fitting into the through hole may be formed in the nozzle or the branch connection pipe.

Further, in the above, at least one of the nozzle, the branch connection pipe or the fluid pipe can be formed of a synthetic resin.

[0013]

Embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, a sprayer A adopting a structure for attaching a nozzle to a fluid pipe according to the present invention includes a main body 6 as a fluid pipe and four nozzles 7 attached to the body. Things. 1 and 2 show a state in which only one nozzle 7 is attached.

The main body 6 has a cylindrical shape made of a synthetic resin, and has an upper surface formed with a connection port 6a for inserting the relay pipe 5 therein, and a lower surface formed with a connection hole 6a. A discharge valve B is provided for discharging a spray liquid such as water, a chemical solution, or a liquid fertilizer accumulated in the main body 6.

A screw portion 6a 'is formed on the outer periphery of the connection port 6a, and four slits 6b for reducing diameter are formed at a constant angular interval from each other. The number of slits 6b for diameter reduction is not limited to four, but may be two or more.

With the lower end portion of the relay pipe 5 inserted into the connection port 6a, the screw-in portion 6a 'is screwed into the tightening nut 8 (see FIG. 2) so that the diameter-reducing slits 6b are narrowed so that the connection is made. The mouth 6a is reduced in diameter, whereby the main body 6 is connected to the relay pipe 5 in a watertight manner.

The discharge valve B is screwed into a screw hole 6e 'of a boss 6e protruding from a lower wall surface 6d of the main body 6. The discharge valve B is a large-diameter upper cylinder having a male screw formed on an outer peripheral surface B1'. A valve case Ba in which a small-diameter lower cylindrical portion B2 having a discharge hole B2 'is integrally formed on the lower surface of the portion B1.
And a valve Bb made of an elastic material such as rubber, which is disposed in the inside thereof so as to be vertically movable. Note that a is an O-ring.

The valve Bb is formed by integrally forming an insertion portion Bb ″ disposed in the lower cylindrical portion B2 on the lower surface of a cylindrical portion Bb ′ disposed in the upper cylindrical portion B1. ′, And discharge holes B
It is vertically movable so as to allow discharge of the spray liquid from 2 '.

On the peripheral wall 6c of the main body 6, four circular through holes 9 are formed. That is, by forming the circular through-hole 9 in the cylindrical peripheral wall 6c, the inner opening 9 ″ of the through-hole 9 has a shape following the intrusion curve.

Specifically, as shown in FIGS. 1 to 3, the inner opening 9 "is formed on both upper and lower sides on a vertical plane including the center axis O of each through hole 9 and the center axis O 'of the main body 6. From the elastic flange engagement positions 9a, 9a to the elastic flange non-engagement positions 9b, 9b on the left and right sides on a horizontal plane passing through an intersection P where the two center axes O, O 'intersect.

The nozzle 7 has an inner space α as shown in FIG.
And a cylindrical nozzle tip 11 inserted into the inner space α of the body 10.

The body 10 is made of a synthetic resin, for example, and has an outer diameter larger than the inner diameter of the through hole 9 formed in the main body 6 as shown in FIGS. The ring fitting insertion part 14, the fitting part 15, and the elastic engaging part 16 are integrally connected to the large diameter part 13 which is engaged with the edge, and is formed at the center of the outer wall 13a. Into the through-hole 13a 'for spraying the spray liquid.
An insert member 12 made of metal, synthetic resin, ceramic, or the like is fitted.

The insert member 12 has a columnar shape having a liquid injection hole 12a formed in the center, and a funnel-shaped recess 12b is formed on the inner surface thereof.

The ring insertion portion 14 has an outer diameter slightly smaller than the inner diameter of the through hole 9, and a ring groove 14 a for receiving an O-ring 17 for resiliently pressing the inner wall of the through hole 9 is formed therein. I have. Further, the fitting portion 15 is formed to have an outer diameter that can be fitted in close contact with the inner wall surface of the through hole 9.

As shown in FIG. 5, the elastic engaging portion 16 has a pair of engaging elastic flanges 16 formed on both sides of the left and right sides of the deforming slits 18 and 18 as boundaries.
a and 16b are formed in an arc shape.

The outer peripheral surfaces of the pair of engaging elastic flanges 16a, 16b are engaged with the portions centered on the upper and lower elastic flange engaging positions 9a, 9a of the inner opening 9 "of the through hole 9. Engaging claws 16a ', 16b' having a triangular cross section as shown in FIG.
(16b 'is not shown), and the outer diameter M between the arcuate tops of the engaging claws 16a' and 16b 'is defined by the diameter of the through hole 9 as shown in FIGS. It is set slightly larger than the inner diameter.

The engaging elastic flanges 16a and 16b are separated from the engaging claws 16a 'and 16b' by the opening forming surface 16c.
The tapered curved surface portions 16d, 16d are formed toward.

The curved portions 16d, 16d are
By contacting the upper and lower edges of the outer opening 9 ′, the engaging elastic flanges 16 a and 16 b are formed so as to exert a force to approach each other. That is, the elastic flanges 16a and 16b for engagement are formed with the slits 18 and 1 for deformation.
8 is elastically deformed so as to reduce the outer diameter M by reducing the width.

As shown in FIGS. 1 to 6, the fitting portion 15 and the elastic engaging portion 16 have inclined surfaces on both left and right sides thereof, the width of which decreases from the fitting portion to the elastic engaging portion. 19,
19 are formed.

The edge 13b of the large diameter portion 13 and the engaging claw 16
As shown in FIGS. 3, 4, and 6, the distance L between the outer edge 9a and the outer edge 9 '
5 and 6, the engaging claws 16a ', shown in FIGS.
16b ', 16a ", 16a", 16b ",
16b "is set so as to engage with the portions centered on the elastic flange engagement positions 9a, 9a on the upper and lower sides of the inner opening 9" of the through hole 9.

In other words, the edge 13 b of the large diameter portion 13
And left and right side portions 16a ″, 16a ′ of the engaging claws 16a ′, 16b ′.
16a ", 16b", and 16b ", the peripheral wall 6c of the main body 6 can be sandwiched. When the nozzle 7 is rotated to the right or left by about 90 degrees, the engagement claws 16a ', 1
The arc-shaped top of 6b 'is set at an interval where it contacts the inner wall surfaces near the elastic flange non-engagement positions 9b, 9b on the left and right sides of the inner opening 9 ".

The elastic engaging portion 16 is not limited to the configuration in which the pair of elastic flanges 16a and 16b for engagement are formed with the slits 18 and 18 for deformation as boundaries. A configuration in which a plurality of elastic flanges for engagement are formed with the boundary of the slit for engagement.

The nozzle tip 11 is made of a metal in which a small diameter portion 20 and a large diameter portion 21 are integrally formed as shown mainly in FIGS. The nozzle tip 11 may be formed of synthetic resin, ceramic, or the like, in addition to metal.

On the diameter line of the nozzle tip 11, from the opening forming surface 21 a to the intermediate portion of the small diameter portion 20, a liquid introduction groove 22 for guiding the spray liquid flowing into the inner space α to the insert member 12. Are formed.

The outer surface 20a of the small diameter portion 20 has a liquid introduction groove 2
The swirl flow generating grooves 23, 23 for generating a swirl in the spray liquid flowing into the inner space α through the inner space 2 are parallel to each other, and their bottoms 23a, 23a are, as shown in FIG. It is formed so as to be shallower from the inside toward the inside.

Next, the nozzle 7 for the main body 6 of the sprayer A
The method of attaching and detaching will be described with reference to FIGS. <Attachment of Nozzle to Main Body> When the nozzle 7 is attached to the main body 6, as shown in an enlarged side view of FIG.
The outer opening 9 ′ of the through-hole 9 is brought into contact with the upper and lower edges of the outer opening 9 ′,
In this state, the nozzle 7 is pushed into the through hole 9.

When the elastic engaging portion 16 is to be pushed into the through hole 9 of the main body 6, the curved elastic portions 16a, 16d are fitted to the curved portions 16d, 16d of the engaging elastic flanges 16a, 16b in accordance with the pushing operation. Acts to narrow the distance between the two.

As a result, as shown in FIG. 13, the width of the deforming slits 18, 18 is reduced, and the engaging elastic flanges 16a, 16b are deformed so that they can be inserted into the through holes 9. Note that the deformation slits 18 and 18 (one not shown) and the engagement elastic flanges 16a and 16b shown in FIG. 13 are exaggerated in terms of the amount of deformation to explain these deformations.

When the elastic engaging portion 16 is pushed into the through hole 9, as shown in an enlarged plan view of FIG. 14, the engaging claws 16a ', 16b' (16) of the engaging elastic flanges 16a, 16b.
b 'is not shown), but protrudes inward of the main body 6 from the inner opening 9 "of the through hole 9.

By this projection, the elastic flanges 16a, 1
6b is elastically returned to the original state, and the right and left side portions 16a "and 16a" of the engaging claw 16a 'of the engaging elastic flange 16a and the left and right side portions 16b "and 16b" of the engaging claw 16b' are penetrated. The upper and lower edges of the inner opening 9 ″ of the hole 9 are engaged with the elastic flange engagement positions 9 a, 9 a, respectively.

By this engagement, the fitting portion 15 is tightly fitted to the inner wall surface of the through hole 9 and the O-ring 17 fitted in the ring groove 14a of the fitting portion 14 is pressed. That is, since the O-ring 17 presses against the inner wall surface of the through hole 9, the spray liquid in the main body 6 does not leak.

The spray liquid fed to the sprayer A via a feed pipe (not shown) is applied to the spray groove 22 of the nozzle tip 11.
Flows into the inner space portion α, and further flows into the vortex flow generating grooves 23 via a gap formed between the outer peripheral surface of the small diameter portion 20 and the inner space portion α.

The spray liquid that has flowed into the vortex flow generating grooves 23, 23 is applied to the outer surface 20 a of the small diameter portion 20 and the insert member 12.
Between the insert member 12 and the
After flowing into the inside, it is sprayed outside so as to spread out in a conical shape.

The nozzle 7 receives an internal pressure due to the spray liquid flowing into the nozzle 7, and the internal pressure is applied to the engaging elastic flanges 16 a and 16 b so as to press them against the inner wall surface of the through hole 9. Therefore, as the pressure of the spray liquid increases, the degree of adhesion of the nozzle 7 to the main body 6 increases accordingly.

<Removal of Nozzle from Main Body> To remove the nozzle 7 from the main body 6 in the mounted state, the nozzle 7 is rotated by about 90 degrees in either direction, and as shown in FIG. The elastic flanges 16a and 16b are turned sideways.

That is, by rotating the nozzle 7 by about 90 degrees, the engagement claws 16 of the engagement elastic flanges 16a and 16b are rotated.
a ', 16b' are separated from the elastic flange engaging positions 9a, 9a on the upper and lower sides of the inner opening 9 "of the through hole 9 with which the engaging claws 16a ', 16b' are engaged, and the arcuate tops of the engaging claws 16a ', 16b'. Are in contact with the inner wall surfaces of the left and right sides near the elastic flange non-engaging positions 9b, 9b, whereby the engaging elastic flanges 16a, 16b
The diameter of the through hole 9 is elastically reduced so as to have the same outer diameter as the inner diameter.

By this diameter reduction deformation, the engaging elastic flange 16 is formed.
In this state, the nozzles 7 can be easily removed from the main body 6 simply by applying a pulling force to the nozzles 7.

Next, the structure for attaching the branch connection pipe C to the fluid pipe according to the present invention will be described with reference to FIG. The supply pipe 24 as a fluid pipe is formed of metal or synthetic resin, and a circular through hole 25 for attaching the branch connection pipe C is formed in the peripheral wall 24a.

That is, by forming the circular through-hole 25 in the peripheral wall 24a of the feed pipe 24, the inner opening 25 ″ of the through-hole 25 has a shape following the intrusion curve.

More specifically, the inner opening 25 ″ of the through hole 25
The upper and lower elastic flange engagement positions 25 on a vertical plane including the center axis Q of the feed pipe 24 and the center axis R of the feed pipe 24
a, 25a from the elastic flange non-engagement positions 25b, 25b on the left and right sides on a horizontal plane passing through the intersection P 'where the two center axes Q, R intersect.

The branch connection pipe C is made of metal or synthetic resin, and has an outer diameter larger than the inner diameter of the through hole 25.
A large-diameter portion 26 that engages with the rim of the outer opening 25 ′ has a ring fitting insertion portion 27, a fitting portion 28 that fits into the through hole 25, and a mouth of the inner opening 25 ″ of the through hole 25. It has a cylindrical shape in which elastic engaging portions 29 engaging with the rim are integrally connected, and 31 is a hose fitted to the large diameter portion 26.

The ring insertion portion 27 is formed to have an outer diameter slightly smaller than the inner diameter of the through hole 25, and a ring groove 27 a into which the O-ring 17 closely attached to the inner wall of the through hole 25 is inserted. Is formed. Further, the fitting portion 28 is formed to have an outer diameter that can be fitted in close contact with the inner wall surface of the through hole 25.

The elastic engaging portion 29 is formed by a pair of engaging elastic flanges 29a, 2 formed by a pair of deforming slits 30, 30 (one of which is not shown) formed opposite to both left and right portions thereof.
9b is formed in an arc shape.

The pair of engaging elastic flanges 29a, 29b
Are formed on the outer peripheral surfaces thereof with engaging claws 29a ', 29b' having a triangular cross section which engage with portions around the elastic flange engaging positions 25a, 25a on the upper and lower sides of the inner opening 25 "of the through hole 25.
The engagement claws 29a ', 2
The outer diameter M ′ between the arcuate tops of 9 b ′ is set slightly larger than the inner diameter of the through hole 25.

The engaging elastic flanges 29a, 29b have curved surface portions 29d, 29d tapering toward the opening forming surface 29c.
Is formed.

The edge 26a of the large diameter portion 26 and the engaging claw 29
When the inner surface 26a is brought into contact with the outer opening 25 'of the through hole 25, the left and right sides of the engaging claws 29a' and 29b ' Elastic flange engagement positions 25a, 25 on the upper and lower sides of the inner opening 25 "
It is set so as to engage with a portion centered at a.
The fitting portion 28 and the elastic engaging portion 29 are formed with inclined surfaces 32, 32 (one of which is not shown) whose width decreases from the outside to the inside on both left and right sides thereof.

The method of attaching and detaching the branch connection pipe C to and from the feed pipe 24 is described in the above-described sprayer A.
Since the method for attaching and detaching the nozzle 7 to and from the main body 6 is the same as that described above, the description is omitted here.

Next, another example of the nozzle tip will be described. As shown in FIGS. 17 to 21, the nozzle tip 33 is made of a synthetic resin in which a small diameter portion 34 and a large diameter portion 35 are integrally formed. Can be used by interpolation.
In addition, as the nozzle tip 33, in addition to the above synthetic resin,
It may be formed of metal, ceramic, or the like.

The opening forming surface 35a of the nozzle tip 33
A liquid inflow chamber 36 having a cylindrical shape is formed between the small diameter portion 34 and an intermediate portion of the small diameter portion 34, and the sprayed liquid that has flowed into the liquid inflow chamber 36 is formed in opposing portions of the peripheral wall surface of the small diameter portion 34. Liquid introduction hole 3 leading toward insert member 12
7, 37 are formed in a rectangular cross section.

The outer surface 34a of the small diameter portion 34 has a liquid introduction groove 3
Vortex flow generating grooves 38, 38 having the same shape as the vortex flow generating grooves 23, 23 for generating a vortex in the spray liquid that has flowed into the inner space α through the cavities 7, 37, are made parallel to each other, and As shown in FIG. 17, the bottoms 38a, 38a are formed so as to be shallower from the outer side toward the inner side.

The nozzle may have the following structure. The nozzle 39 shown in FIGS. 22 and 23 has a large-diameter portion 13 'and a ring-fitting portion formed in a cylindrical body 39a having an inner space β formed by connecting cylindrical cavities β1 and β2 having different inner diameters. 14 ', the fitting portion 15', and the elastic engaging portion 16 'are integrally and continuously provided, and no component corresponding to the nozzle tip is provided.

The large-diameter portion 13 'and the ring insertion portion 1
Regarding the size and outer shape of the 4 ', the fitting portion 15' and the elastic engaging portion 16 ', the large diameter portion 13, the ring fitting portion 1
4, since they are the same as the fitting portion 15 and the elastic engaging portion 16, respectively, here, the same reference numerals are denoted by "'" and their description is omitted.

A groove 40 having a V-shaped cross section is formed on the outer surface 13a 'of the large diameter portion 13' on the diameter line of the outer surface 13a '. The center of the outer surface 13a', that is, the center bottom of the groove 40 is formed at the center. , An elliptical liquid ejection hole 41 is formed so as to communicate with the empty chamber β2. The spray liquid can be blown out in a fan shape by the V-shaped groove 40 and the elliptical liquid blowing hole 41.

The discharge valve formed in the main body 6 may have the following structure. As shown in FIG. 24, the discharge valve E has a large-diameter portion 42b having an external thread formed on an outer peripheral surface 42a and a small-diameter discharge hole 4 formed on a lower surface.
Valve case 4 composed of a small diameter portion 42d formed with 2c
2. Consists of a valve ball 43 and a coil spring 44.

The valve ball 43 is disposed in the large-diameter portion 42b, and is elastically supported by a coil spring 44 disposed in the small-diameter portion 42d. An O-ring 45 is provided on the bottom surface of the large-diameter portion.

In this discharge valve E, the valve ball 4
3 prevents the spray liquid from being discharged by descending against the elastic force of the coil spring 44, and allows the discharge of the spray liquid by the valve ball 43 rising by the elastic force of the coil spring 44. Become like

The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the invention.

In the above description, a case where a liquid such as a spray liquid is circulated through the feed pipe has been described. However, the present invention can be applied to a case where a gas such as a gas is circulated for promoting photosynthesis. Further, the number of nozzles 7 attached to the main body 6 is not limited to four, and may be one to three or five or more. That is, the number of nozzles may be appropriately set as needed.

The structure of the outer wall portion of the nozzle body, that is, the structure for injecting fluid, includes a structure in which an insert member is fitted to the outer wall, a groove in the outer surface of the large diameter portion, and a liquid blowing hole in the bottom of the groove. The fluid is not limited to the one formed, and it is sufficient that the fluid can be ejected.

Further, as for the fluid pipe, not only the through hole is formed in the peripheral wall having a constant thickness as described above, but also, for example, only a part of the peripheral wall forming the through hole may be thickened or thinned. Further, without changing the thickness of the peripheral wall, for example, a part of the peripheral wall may be formed into a cylindrical shape on the outside and protruded or formed into a cylindrical shape on the inside to be recessed, and a through hole may be formed at the bottom thereof. Further, adjacent through holes may be formed in an irregular positional relationship with each other, or may be formed so as to be displaced vertically. That is, the formation position of the through-hole may be appropriately set as needed.

[0071]

According to the first to seventh aspects of the present invention, the nozzle or the branch connection pipe is formed at the rim of the inner opening of the through hole formed in the peripheral wall of the fluid pipe and inserted from the outer opening of the through hole. Since the elastic engagement portion is engaged, the nozzle or the branch connection pipe can be attached to and detached from the fluid pipe with one touch. Accordingly, unlike the conventional case, the nozzle, the branch connection pipe, or the fluid pipe is not subjected to the thread cutting process, so that the manufacturing cost can be reduced.

In addition to the above-mentioned common effects obtained by the first to seventh aspects of the present invention, the following effects can be obtained according to the respective aspects of the present invention. According to the second aspect of the present invention, the nozzle or the branch connection pipe has a large-diameter portion that engages with the rim of the outer opening of the through-hole, and a ring fitting in which an O-ring that presses against the inner wall of the through-hole is fitted. Since the insertion portion and the elastic engagement portion are integrally formed, the nozzle or the branch connection pipe can be tightly attached to the fluid pipe.

According to the third aspect of the present invention, the nozzle is
Since it is composed of a cylindrical body having an inner space and a nozzle tip inserted into the inner space, the large diameter portion, the ring fitting portion and the elastic engaging portion are formed in the body. ,
Since the O-ring fitted into the ring fitting portion presses against the inner wall surface of the through-hole, fluid does not leak outside from the mounting portion of the nozzle and the fluid pipe.

According to the fourth aspect of the present invention, the nozzle is
A groove having a V-shaped cross section is formed on the outer surface of the cylindrical body having the inner space, and an elliptical liquid injection hole communicating with the inner space is formed at the bottom of the groove to penetrate therethrough. Since the large-diameter portion, the ring-fitting portion, and the elastic engaging portion are formed on the body, the O-ring fitted into the ring-fitting portion resiliently presses against the inner wall surface of the through-hole, whereby the nozzle and the fluid The spray liquid can be spouted without the fluid leaking from the mounting portion of the pipe to the outside.

According to the fifth aspect of the present invention, since the elastic engaging portion is constituted by the plurality of engaging elastic flanges formed at the boundary of the deformation slit, the elastic deformation of the engaging elastic flange can be easily performed. Can be performed.

According to the sixth aspect of the present invention, since the nozzle or the branch connection pipe is formed with the fitting portion having an outer diameter capable of fitting into the through hole, the positioning with respect to the through hole is easily performed. be able to.

According to the seventh aspect of the present invention, since the nozzle, the branch connection pipe, or the fluid pipe is formed of a synthetic resin, it is possible to reduce the weight and to integrally mold it, and at a low cost. Can be manufactured.

[Brief description of the drawings]

FIG. 1 is an enlarged plan view of a sprayer employing a structure for mounting a nozzle to a fluid pipe according to the present invention, and shows a part of the sprayer in cross section.

FIG. 2 is an enlarged front view showing a part thereof in a cross section taken along a line II in FIG. 1;

FIG. 3 is an enlarged view of an encircling line II shown in FIG.

FIG. 4 is an enlarged side view of the nozzle, and shows a part in cross section.

FIG. 5 is an enlarged rear view thereof.

FIG. 6 is an enlarged plan view of a part thereof.

FIG. 7 is an enlarged sectional view of an encircling line III shown in FIG.

FIG. 8 is an enlarged side view of the nozzle tip.

FIG. 9 is an enlarged front view thereof.

FIG. 10 is an enlarged plan view of a part thereof.

FIG. 11 is an enlarged rear view thereof.

FIG. 12 is an enlarged side view illustrating a state in which the nozzle is attached to the peripheral wall of the main body, and shows a state in which an elastic engagement portion is pressed against an outer opening of a through hole.

FIG. 13 is an enlarged side view for explaining a situation in which the nozzle is attached to the peripheral wall of the main body, showing a state in which an elastic engaging portion is inserted into a through hole.

FIG. 14 is an enlarged plan view showing a state in which the nozzle is attached to the peripheral wall of the main body, showing a state in which the elastic engagement portion projects inward from the inside opening of the through hole.

FIG. 15 is an enlarged plan view showing a state where the nozzle engaged with the through hole is rotated by 90 degrees.

FIG. 16 is an enlarged front view showing a structure for attaching a branch connection pipe to a fluid pipe according to the present invention, and shows the branch connection pipe and the fluid pipe separately.

FIG. 17 is an enlarged side view showing another example of the nozzle tip.

FIG. 18 is an enlarged front view thereof.

FIG. 19 is an enlarged plan view of a part thereof.

20 is a sectional view taken along line IV-IV shown in FIG.

21 is a sectional view taken along line VV shown in FIG.

FIG. 22 is an enlarged side view showing another example of the nozzle, and shows a part in section.

FIG. 23 is an enlarged front view thereof.

FIG. 24 is an enlarged side view of a main body provided with another example of a discharge valve.

FIG. 25 is an enlarged front view showing a conventional feed pipe and a sprayer disposed at a predetermined interval in the feed pipe.

[Explanation of symbols]

 6 Body as fluid pipe 6c, 24a Peripheral wall 7, 39 Nozzle 9, 25 Through hole 9 ', 25' Outer opening 9 ", 25" Inner opening 10 Body 11, 33 Nozzle chip 13, 26 Large diameter portion 14, 27 Insertion Part 15, 28 Fitting part 16, 29 Elastic engaging part 16a, 16b Elastic flange for engagement 16a ', 16b' Engaging claw 17 O-ring 18 Slit for deformation 24 Feed pipe 29a, 29b as fluid pipe Elastic for engagement Flange 29a ', 29b' Engagement claw C Branch connection pipe α, β

Claims (7)

[Claims] An elastic engagement portion formed on a nozzle or a branch connection pipe inserted through the outer opening of the through hole is engaged with the rim of the inner opening of the through hole formed in the peripheral wall of the fluid pipe. A structure for mounting a nozzle or a branch connection pipe to a fluid pipe. 2. The nozzle or the branch connection pipe has a large-diameter portion that engages with an edge of an outer opening of the through hole, a ring insertion portion that inserts an O-ring that presses against an inner wall of the through hole, and the elasticity. The structure for attaching a nozzle or a branch connection pipe to a fluid pipe according to claim 1, wherein the engagement portion is formed integrally. 3. The nozzle comprises a cylindrical body having an inner space formed therein, and a nozzle tip inserted into the inner space. The nozzle has a large diameter portion, a ring insertion portion, and an elastic member. 3. The structure according to claim 2, wherein a joining portion is formed. 4. The nozzle has a groove formed in a cylindrical body having an inner space formed therein, and a liquid blowing hole communicating with the inner space formed through the bottom of the groove. 3. The structure for mounting a nozzle or a branch connection pipe to a fluid pipe according to claim 2, wherein the large diameter section, the ring fitting insertion section and the elastic engagement section are formed. 5. The elastic engaging portion has a plurality of engaging elastic flanges formed with the deformation slit as a boundary.
5. A structure for mounting a nozzle or a branch connection pipe according to 2, 3, or 4 to a fluid pipe. 6. A fitting portion having an outer diameter capable of fitting into a through hole is formed in a nozzle or a branch connection pipe.
A mounting structure of the nozzle according to 2, 3, 4 or 5 to a fluid pipe. 7. A method according to claim 1, wherein at least one of the nozzle, the branch connection pipe or the fluid pipe is formed of a synthetic resin.
7. A structure for mounting a nozzle or a branch connection pipe according to 3, 4, 5, or 6 to a fluid pipe.