JPH1156132A - Tube holder for distributing, distributor and distributing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a distributor hardly causing dripping of a remaining liquid. SOLUTION: This distributor 1 has a flexible tube 31 for distribution and connected through a first joint 27 to a cheese 22 connected to a distribution pipe 8. A part near to the base edge part of the tube 31 for distribution is inserted to an arc part 42 and also both near sides of this part are inserted to holding parts 52, and a tool 41 for holding the tube 31 for distribution is attached to the tube 31 for distribution. A portion of the part near to the base edge part of the tubes 31 for distribution becomes a state bent and positioned at a position higher than the distribution pipe 8. Neighbors of the portion of the part near to the base edge part are held by the holding parts 52 at nearly constant distance. When carrying out distribution, the tube 31 for distribution is hardly swung, and after finishing the distribution, the remaining liquid in the distribution pipe 8 hardly drips from the tip of the tube 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray tube holder for spraying a liquid, a sprayer, and a spray system.

[0002]

2. Description of the Related Art Conventionally, for spraying water on vegetables, flowers and fruit trees in a greenhouse, for example, a nozzle having an upward direction is attached to the upper surface of a spraying pipe disposed substantially horizontally in the greenhouse. Was spouting water upwards from.

However, in this case, since the nozzle is located on the upper surface of the spraying pipe, water spouted from the nozzle splashes on vegetables and the like located below, and also sprays on the spraying pipe itself. After the spraying is completed, the water attached to the spraying pipe is dripped from the spraying pipe, adversely affecting the subsequent work.

[0004] Therefore, as a sprayer for preventing water adhering to a spray pipe from dripping, for example, Heisei 9
A sprayer having a configuration described on page 62 of "Facilities and Horticulture No. 96" issued by the Japan Institutional Horticulture Association on March 10, 2003 is known.

In this sprayer, a flexible spray tube is connected to the lower surface of a spray pipe disposed substantially horizontally above a greenhouse, and a longitudinal end of the spray tube is connected to the distal end of the spray tube. A hard suspension pipe is connected,
The nozzle is connected to the tip of the suspension pipe.

[0006] For example, when water is sprayed on vegetables or the like, the nozzle is located on the lower surface side of the spraying pipe.
Water spouted from this nozzle does not splash on the spraying pipe. Therefore, according to this sprayer, water does not drip from the spraying pipe after the spraying is completed.

[0007]

However, in the configuration in which the nozzle is connected to the lower surface side of the spraying pipe via a spraying tube and a suspension pipe as in the above-mentioned conventional sprayer, the spraying is performed after the spraying is completed. There is a problem that the residual liquid remaining in the spray pipe, the spraying tube, the suspension pipe, and the like flows through the spraying pipe, the spraying tube, the suspension pipe, and the like, and drops from the nozzle.

Therefore, the sprinkler is opened downstream of the suspension pipe only when the pressure of the liquid in the suspension pipe reaches a certain value, and is kept closed when the pressure decreases. It is conceivable to install a liquid valve so that the residual liquid does not drip.However, impurities mixed in the liquid may cause clogging of the liquid stop valve, preventing the liquid from being effectively ejected from the nozzle. There is a problem that maintenance for preventing such a situation is complicated.

The present invention has been made in view of the above points, and provides a spraying tube holder, a sprayer, and a spraying system in which residual liquid does not drip from a nozzle and maintenance is easy. With the goal.

[0010]

According to a first aspect of the present invention, there is provided a spraying tube holder, wherein a base end is connected to a spraying pipe and a liquid is ejected from a distal end located at a position lower than the spraying pipe to increase flexibility. A part of the spraying tube having an arcuate part which can be inserted and removed and is formed into a substantially arc shape; And a holding unit for holding the object.

In this configuration, when a part of the spraying tube is inserted into the arc portion and the vicinity of both ends of a part of the spraying tube is inserted into the holding portion, a part of the spraying tube becomes substantially arc-shaped. In addition, since the vicinity of both ends of a part of the spraying tube is held by the holding parts, the liquid in the spraying tube that tries to straighten the substantially arcuate part during spraying is The force due to the momentum is suppressed, the shaking of the spraying tube is prevented, and after the spraying is completed, if a part of the spraying tube is located at a position higher than the spraying pipe, the residual liquid in the spraying pipe is reduced. It does not flow more than necessary in the spray tube, and the residual liquid in the spray pipe does not drip from the tip of the spray tube.

Further, by inserting a part of the spraying tube into the arc portion and inserting the vicinity of both ends of the part of the spraying tube into the holding portion, the part of the spraying tube can be surely formed in a substantially arc shape. And the vicinity of both ends of a part of the spraying tube can be held by the holding portions, respectively, and can be maintained in an arc shape.

[0013] The spraying tube holder according to the second aspect,
The spraying tube holder according to claim 1, which is formed of polypropylene.

[0014] In this configuration, in addition to the function of the spraying tube holder according to the first aspect, since it is molded from polypropylene, it is hardly deformed even at a relatively high temperature.

According to a third aspect of the present invention, there is provided a spraying tube which has a base end connected to a spraying pipe and which ejects liquid from a distal end located at a position lower than the spraying pipe, and which has flexibility. 3. A part of the tube is held at a position higher than the spraying pipe. 4.
And a spray tube holder as described above.

In this configuration, both ends of a part of the spraying tube are held by the spraying tube holder in a state where a part of the spraying tube curved in a substantially arc shape is positioned higher than the spraying pipe. Since the vicinity is held by the holding portion, the spraying tube is prevented from shaking at the time of spraying, and after spraying, the residual liquid in the spraying pipe is dispersed in the spraying tube. The liquid does not flow to a position higher than the pipe, and the residual liquid in the spray pipe does not drip from the tip of the spray tube.

According to a fourth aspect of the present invention, there is provided the sprayer according to the third aspect, further comprising: a hard suspension pipe having a base end connected to a distal end of the spray tube; and a nozzle connected to a distal end of the suspension pipe. It is provided with.

In this configuration, since a substantially straight hard hanging pipe connected between the spraying tube and the nozzle is provided, the spraying tube receives a vertically downward force from the hanging pipe, and The swaying of the spray tube at the time is surely prevented.

According to a fifth aspect of the present invention, there is provided a spraying system, wherein a spray pipe is disposed substantially horizontally, and a liquid is ejected from a tip connected to a base end of the spray pipe and positioned lower than the spray pipe. 3. The spraying tube holder according to claim 1, wherein the spraying tube has flexibility, and a part of the spraying tube is held at a position higher than the spraying pipe. A pump that supplies liquid to the pipe, a suction valve that is provided upstream of the spraying pipe, and that sets the pressure in the spraying pipe to atmospheric pressure when the pump is stopped, and a suction valve that is downstream of the spraying pipe. And a discharge valve that opens in response to the opening of the suction valve and discharges the residual liquid to the outside of the spraying pipe.

In this configuration, when the pump is stopped after the spraying is completed, both the suction valve and the discharge valve are opened, the air is sucked into the spraying pipe, and the pressure in the spraying pipe becomes atmospheric pressure. At the same time, since the residual liquid in the spray pipe is discharged out of the spray pipe, damage to the spray pipe due to, for example, freezing and coagulation of the residual liquid is prevented.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an embodiment of a spraying system according to the present invention will be described below with reference to the drawings.

In FIG. 2, reference numeral 1 denotes a greenhouse for greenhouse cultivation.
Cultivation is being carried out. And this greenhouse 1
Is a liquid L such as water, liquid fertilizer, or a chemical for controlling vegetables 2
For example, a spraying system 3 shown in FIG.

The spraying system 3 comprises a greenhouse 1
And a laying pipe 4 laid down below the inside of the inside, the upstream end of the laying pipe 4 is connected to a liquid supply source 5, and the downstream end of the laying pipe 4 is erected in the greenhouse 1. An upstream end of the standing pipe 7 is connected, and a downstream end of the standing pipe 7 is connected to an upstream end of a spraying pipe 8 suspended above the greenhouse 1.

The laying pipe 4, the standing pipe 7, and the spraying pipe 8 are each formed in a substantially cylindrical shape by, for example, polyethylene (PE) or polyvinyl chloride (PVC).

The laying pipe 4 has a liquid supply source 5
Which is driven by a motor (not shown) that supplies the liquid L from the liquid supply source 5 to the spray pipe 8
A filter 11 is provided on the discharge side of the pump 10 for removing impurities mixed in the liquid L.

Further, an adjusting valve 12 is provided between the pump 10 and the filter 11 for adjusting the flow rate of the liquid L supplied to the spray pipe 8 by the pump 10. A pressure gauge 13 for measuring the pressure of the liquid L in the laying pipe 4 on the discharge side of the pump 10 is attached to the laying pipe 4.

The spraying pipe 8 includes a standing pipe 7.
Side, that is, in the vicinity of the upstream end on the upstream side of the spraying pipe 8, a suction valve 15 which is opened when the pump 10 is stopped to make the pressure in the spraying pipe 8 atmospheric pressure is provided, A discharge valve which is located near the downstream end on the downstream side of the spray pipe 8 and is opened corresponding to the opening of the suction valve 15 and discharges the residual liquid in the spray pipe 8 to the outside of the spray pipe 8. 16 are provided. The suction valve 15 and the discharge valve 16 are provided, for example, for the liquid L in the spray pipe 8.
Is closed only when the pressure reaches a certain value due to the drive of the pump 10, and is kept open when the pressure decreases.

Further, as shown in FIG. 2, the spraying pipe 8 is provided with a large number of sprayers 21, 21,... At predetermined intervals from each other.

As shown in FIG. 1, each of these sprayers 21 has a cheese 22 formed of, for example, polyvinyl chloride in a substantially T-shape when viewed from the front. A pipe connection port 24 is formed at each end of the pipe, and a spraying pipe 8 is connected to the pipe connection port 24.

Further, a joint connecting port 26 is formed in an intermediate cylindrical portion 25 protruding from a central upper portion of the main cylindrical portion 23 of the cheese 22, and the joint connecting port 26 is formed of, for example, polyvinyl chloride. Connected first joint 27 is connected, ie,
A substantially cylindrical base portion 28 formed on the first joint 27 is fitted and fixed to the inner peripheral side of the intermediate cylindrical portion 25 of the cheese 22 so as to be connected.

A substantially hexagonal plate-like flange portion 29 is formed integrally with the upper end of the base portion 28 of the first joint 27. The base portion extends upward from the upper surface of the flange portion 29.
A tube connecting tube portion 30 having an outer diameter smaller than the outer diameter of 28 is formed integrally with the tube connecting tube portion 30.
An annular retaining portion 30a is formed on the outer peripheral surface of the first member so as to protrude in an anchor shape.

The tube connecting tube 30 of the first joint 27
The base end of a flexible soft spray tube 31 formed into a substantially cylindrical shape with, for example, polyvinyl chloride is press-fitted to the outer peripheral side of the tube.

Further, a spraying tube holder 41 is attached near the base end of the spraying tube 31.

In this way, the base end of the spraying tube 31 is connected to the spraying pipe 8 via the cheese 22 and the first joint 27, and the spraying tube holding part is located near the base end of the spraying tube 31. By attaching the tool 41, the spraying tube 31 is securely held in a state of being formed in a certain shape by the spraying tube holder 41.

That is, with the spraying tube holder 41,
In a state where a part of the vicinity of the base end of the spraying tube 31 is curved in a substantially arc shape and is located at a position higher than the spraying pipe 8, the vicinity of both ends of a part of the base vicinity portion is further reduced. It is maintained in a state of being isolated for a certain period of time.

Here, the spraying tube holder 41 will be described with reference to FIGS. 4 to 9. The spraying tube holder 41 is made of, for example, polypropylene (PP).
As shown in FIG. 4, it is formed in a substantially inverted U-shape when viewed from the front.

The sprinkling tube holder 41 is
As shown in FIG. 9, the section is a thin circular arc having a semicircular cross section, and as shown in FIG. 4, has an arc portion 42 formed in a substantially arc shape when viewed from the front. The arc portion 42 is formed to have an inner diameter slightly larger than the outer diameter of the spraying tube 31, and a part of the vicinity of the base end of the spraying tube 31 can be inserted and removed.

A contact surface 43 is formed on the inner surface, which is the upper surface of the arc portion 42, with which a part of the outer peripheral surface near the base end of the spraying tube 31 contacts.

A pair of holding pieces 44, 44 are integrally formed at the upper edge near the center of the arc 42 so as to protrude upward, and these holding pieces 44, 44 are opposed to each other. An engagement projection 45 is integrally formed on the surface to protrude.

Further, at both ends of the arc portion 42, substantially cylindrical holding portions 52, 52 each having a longitudinal opening portion 51 which opens continuously outward and downward are integrally formed. Is formed.

Each of the holding portions 52 is formed to have an inner diameter slightly larger than the outer diameter of the spraying tube 31, and the vicinity of both ends of a portion near the base end of the spraying tube 31 is formed through the opening 51. It is possible to insert and remove
As shown in FIG. 7, the sections 2 and 52 have a thin arc shape having a cross section larger than a semicircle. Therefore, when the holding sections 52 and 52 are elastically deformed and the spray tube 31 is inserted, Five
2 and 52 are compared with a pair of holding piece portions 44 and 44 of the arc portion 42,
The vicinity of both ends of a part of the inserted spray tube 31 is more reliably held.

In order to facilitate insertion and removal of the spraying tube 31 from the holding portion 52 of the spraying tube holder 41, an opening is formed at the outer end of each holding portion 52 facing outward. An arc-shaped tapered widened guide portion 53 facing each other with the 51 interposed therebetween is formed.

Further, on the inner surface of each of the holding portions 42, a contact surface 54, which is in contact with the outer peripheral surfaces near both ends of a portion near the base end of the spraying tube 31, is provided. Are formed continuously.

A contact surface 55 is formed on the lower surface of each of the holding portions 52 so as to contact the upper surface of the flange portion 29 of the first joint 27.

Next, the tip of the spraying tube 31 is
As shown in the figure, a second joint 58 having the same structure as the first joint 27 is provided.
Is press-fitted to the outer peripheral side of the tube connecting tube portion 30.

Although the second joint 58 is located at the same height as the sprinkling pipe 8 as shown in FIGS. 1 and 10, the second joint 58 is actually It is located lower than the pipe 8.

At the lower part of the base 28 of the second joint 58, a base end of a hard hanging pipe 61 formed into a substantially linear and substantially cylindrical shape by, for example, polyvinyl chloride is fitted and fixed. Have been. The hanging pipe 61 has an appropriate length according to the ceiling height of the greenhouse 1, the height of the vegetables 2, and the like.

The tip of the suspension pipe 61 is fitted and fixed to the upper part of the nozzle joint 65. A substantially hexagonal plate-like flange portion 66 is formed below the nozzle joint 65, and a nozzle mounting portion 67 having a female screw portion (not shown) is formed inside.

The nozzle joint 65 has, for example, a micro sprinkler as a nozzle shown in FIG.
71 is connected. The micro sprinkler 71 has a substantially inverted U-shaped bridge 73 when viewed from the front, and a substantially hexagonal plate-shaped nozzle body fixing portion 74 is formed on the upper portion of the bridge 73. A substantially columnar revolving body support portion 75 is formed at a lower portion.

Then, the nozzle body fixing portion of the bridge 73
A nozzle body 77 is fitted and fixed to 74. The nozzle body 77 is a substantially circular tube having a water passage hole formed at an axial center thereof, and an inlet hole 78 is opened upward on an inclined upper surface, and a discharge port is directed downward on a lower surface (not shown). It is open. Further, a nozzle mounting portion 67 is provided on the upper outer surface of the nozzle body 77.
A male screw part 79 corresponding to the female screw part of the nozzle body 77 is formed, and the male screw part 79 of the nozzle body 77 is screwed into the female screw part of the nozzle mounting part 67, whereby the micro sprinkler 71 is connected to the nozzle joint 65. Because

The revolving body support 75 of the bridge 73 includes:
The discharge port of the nozzle body 77 is located inside, and the rotatable revolving body 81 having the discharge direction of the liquid L from the discharge port as the axial direction.
Is supported. The revolving body 81 has a pair of grooves (not shown) formed therein.
In a state where the liquid L is introduced from the nozzle 78 and the liquid L is discharged from the discharge port of the nozzle body 77, the liquid L is jetted laterally along each groove, and the reaction of the jetted liquid L is performed. As a result, the rotating body 81 rotates, and the liquid L is spread over a wide range.

Next, the operation of the embodiment will be described.

First, when attaching the spraying tube holder 41 to the spraying tube 31, a part of the vicinity of the base end of the spraying tube 31 is attached to the arc portion 42 of the spraying tube holder 41. While being inserted from the outer peripheral side of the holder 41, the vicinity of both ends of a part near the base end is inserted into the holders 52, 52 of the spraying tube holder 41 from the opening 51, respectively.

At this time, the outer surface near the base end of the spray tube 31 is brought into contact with the contact surfaces 43 and 54 of the spray tube holder 41. On the other hand, of the two holding portions 52, 52, the holding portion 52 into which the base end side of the spray tube 31 is inserted.
Is brought into contact with the upper surface of the flange portion 29 of the first joint 27.

When the sparging tube holder 41 is attached to the vicinity of the base end of the sparging tube 31 in this manner, the sparging tube 31 is connected to the sparging tube holder 41 by a part near the base end. In a state where the portion is curved in a substantially arc shape and is located at a position higher than the spraying pipe 8, furthermore, it is surely maintained that the vicinity of both ends of a part near the base end is separated from each other by a substantially constant distance. Is done.

Note that the spraying tube holder 41 is a holding unit.
With the contact surface 55 of 52 abutting on the upper surface of the flange portion 29 of the first joint 27, it is securely positioned and fixed.

When the liquid L is sprayed on the vegetables 2 in the greenhouse 1 by using the spraying system 3 provided in the greenhouse 1, for example, the adjusting valve 12 is opened and then the motor is operated. By supplying electric power and driving the pump 10, the liquid L is supplied from the liquid supply source 5 to the spraying pipe 8 one after another via the laying pipe 4 and the upright pipe 7.

Then, the suction valve 15 and the discharge valve 16 which have been opened are respectively closed, and the liquid L from the liquid supply source 5 is supplied to the cheese 22 of the sprayer 21, the first joint 27 and the spray tube 31. And the liquid L flows through the second joint 58, the suspension pipe 61 and the nozzle joint 65.
Finally, the liquid L flows into the micro sprinkler 71 connected to the nozzle joint 65.

Then, the liquid L is introduced into the introduction hole of the nozzle body 77.
When introduced into 78, this liquid L, as shown in FIG.
The micro sprinkler 71 ejects the liquid L laterally along each groove of the revolving body 81, and the repulsion of the injected liquid L causes the revolving body 81 to rotate, and the liquid L is spread over a wide area, to the vegetables 2. Spraying is performed efficiently.

After the predetermined amount of the liquid L has been sprayed, the pump 10 is stopped and the adjustment valve 12 is closed to terminate the spraying operation.

In this manner, the spraying of the liquid L onto the vegetables 2 is performed. According to the above-described embodiment, the spraying tube holder 41 of the sprayer 21 uses the base end of the spraying tube 31. In a state in which a part of the vicinity is curved in a substantially arc shape and is located at a position higher than the spraying pipe 8, further, in a state in which the vicinity of both ends of part of the base vicinity is separated from each other by a substantially constant distance. , Is securely held.

Therefore, since the spraying tube 31 functions as a siphon, the residual liquid in the spraying pipe 8 is sucked into the micro sprinkler 71 immediately after the spraying is completed. However, the suction valve 15 and the discharge valve Since 16 is open, the spray tube 31 does not function as a siphon, and the residual liquid does not flow to a position higher than the spray pipe 8 in the spray tube 31, so that the residual liquid in the spray pipe 8 There is no drip from the micro sprinkler 71 connected to the tip side of the spray tube 31.

Further, since the liquid stop valve is not provided, clogging does not occur due to impurities mixed in the liquid L, so that maintenance can be simplified.

The micro sprinkler 71 connected to the tip of the spraying tube 31 is located at a position lower than the spraying pipe 8, and from this position the liquid L is directed toward the vegetable 2 located at a lower position. , The liquid L ejected from the micro sprinkler 71 does not fall on the spraying pipe 8 and does not adhere thereto.

Further, at the time of spraying, since the force for straightening a part of the substantially arc-shaped portion near the base end is suppressed, the spraying tube 31 of the sprayer 21 is not shaken. For example, fatigue damage due to repeated loads can be suppressed,
The durability of the spray tube 31 can be improved.

Further, since a substantially straight hard hanging pipe 61 connected between the spraying tube 31 and the micro sprinkler 71 of the sprayer 21 is provided, the spraying tube 31 receives a vertically downward force from the hanging pipe 61. , The swaying of the spraying tube 31 during spraying can be reliably prevented, and the vegetable 2
Can be effectively and stably sprayed from an appropriate height position.

After the spraying is completed, the pump 10 is stopped, and when the pressure in the spraying pipe 8 decreases, both the suction valve 15 and the discharge valve 16 are opened. Therefore, while the atmosphere is sucked into the spraying pipe 8 through the suction valve 15, the residual liquid in the spraying pipe 8 is smoothly discharged out of the spraying pipe 8 from the discharge valve 16, for example, Damage to the spray pipe 8 due to freezing and coagulation of the residual liquid can be prevented.

Further, a spraying tube holder for the sprayer 21
Since 41 is molded from polypropylene having a relatively high melting point of 165 to 176 ° C., for example, even if it is used in a relatively high temperature greenhouse 1 of about 60 to 70 ° C., it is not greatly deformed. It can be used effectively with peace of mind.

The work of attaching the spraying tube holder 41 to the spraying tube 31 is performed by inserting a part of the vicinity of the base end of the spraying tube 31 into the arc portion 42 of the spraying tube holder 41. This is completed only by inserting the vicinity of both ends of a part near the base end into the holding portions 52, 52 of the spraying tube holder 41 from the opening portion 51, so that the spraying tube located above the greenhouse 1 is completed. Even when the sparging tube holder 41 is attached to the spout 31, even a beginner can attach it efficiently and easily.

Further, since the sprinkling tube holder 41 has a symmetrical shape, there is no need to consider the left and right when attaching to the sprinkling tube 31.

Further, engaging projections 45, 45 are formed on the pair of holding pieces 44, 44 of the arc portion 42 of the spraying tube holder 41 so as to protrude near the base end of the spraying tube 31. In a state where a part 35 of the portion is inserted into the arc portion 42, the engaging projection 45 of the holding piece portion 44 engages with an intermediate portion of a portion near the base end, so that the pair of holding portions 44 With the pieces 44, 44, the state in which a part of the outer surface near the base end is in contact with the contact surface 43 of the arc portion 42 can be reliably maintained, and the spraying tube 31
Can be prevented, and the tip of the spray tube 31 can be prevented from moving upward.

Further, the second joint 58 of the sprayer 21 is located at a position lower than the spraying pipe 8.
Since the spraying tube 31 of 21 is soft, even if the spraying tube 31 collides with the spraying pipe 8, the spraying pipe 8 and the spraying tube 31 are not significantly damaged.

In the above-described embodiment, the configuration in which the spraying tube holder 41 is formed of polypropylene has been described. However, the present invention is not limited to polypropylene, and a synthetic resin such as polyvinyl chloride, polyethylene, and polystyrene may be used. Alternatively, it may be formed of a relatively hard rubber or a light metal such as aluminum.

Further, in the above embodiment, the spraying system 3 has been described as a system for spraying the liquid L to the vegetables 2.
It is also used for spraying.

Further, in the above embodiment, the sprayer 21 includes the cheese 22, the first joint 27, and the spray tube 3.
1. Spraying tube holder 41, second joint 58, hanging pipe 61, nozzle joint 65 and micro sprinkler 71
Has been described, for example, the first joint
27, the second joint 58 and the nozzle joint 65 may not be provided, and the sprayer 21 may be, for example, located at a position where the base end is connected to the spray pipe 8 and lower than the spray pipe 8. A configuration may be adopted in which only the spraying tube 31 and the spraying tube holder 41 for ejecting the liquid L from the leading end toward the vegetable 2 are provided.

In the above embodiment, the nozzle connected to the tip of the spraying tube 31 of the sprayer 21 is not limited to the micro sprinkler 71 shown in FIG. A nozzle may be used.

For example, the nozzle 91 shown in FIG. 10 may be used.
The nozzle 91 has a substantially cylindrical base end portion 92 fitted and fixed to the inner peripheral side of the distal end portion of the suspension pipe 61, thereby forming the sprayer 21a.
Is connected to the tip side of the spray tube 31.

A discharge port 94 is formed at the tip end portion 93 of the nozzle 91 so as to face downward, and the liquid L discharged downward from the discharge port 94 is sprayed in a wide range toward the side. A metal nozzle body 96 is attached to the nozzle.

The operation section 97 is provided on the side surface of the nozzle 91.
Are formed so as to protrude, and by rotating the operation portion 97, the flow rate of the liquid L discharged from the discharge port 94 is adjusted. Therefore, according to the sprayer 21a provided with the nozzle 91, for example, the spray amount and the flight distance of the liquid L can be freely adjusted according to the vegetables 2 located below.

[0080]

According to the spraying tube holder according to the first aspect, when a part of the spraying tube is inserted into the arc portion and the vicinity of both ends of the part of the spraying tube is inserted into the holding portion, A part of the spraying tube becomes substantially arc-shaped, and the vicinity of both ends of a part of the spraying tube is held by the holding portions, respectively. The residual liquid in the spray pipe can be prevented from flowing more than necessary in the spray tube,
Simple maintenance because the residual liquid in the spraying pipe can be prevented from dripping from the tip of the spraying tube, and because it is not equipped with a valve for stopping liquid, it does not cause clogging due to impurities mixed in the liquid. Can be

Further, at the time of spraying, it is possible to suppress the force for straightening the substantially arcuate part, thereby preventing the scattering of the spraying tube, and for example, it is possible to suppress the fatigue damage due to the repeated load. In addition, the durability of the spray tube can be improved.

Further, by inserting a part of the spraying tube into the arc part and inserting the vicinity of both ends of the part of the spraying tube into the holding part, the part of the spraying tube can be surely formed into a substantially arc shape. In addition to being able to be formed, the vicinity of both ends of a part of the spraying tube can be respectively held by holding portions,
Since the work of attaching to the spraying tube is completed, for example, even in the case of attaching to a spraying tube arranged above the greenhouse in a greenhouse, the installation can be efficiently and easily performed.

According to the spraying tube holder of the second aspect, in addition to the effect of the spraying tube holder of the first aspect, since it is molded from polypropylene, it is hardly deformed even at a relatively high temperature. For example, it can be effectively used even in a greenhouse.

According to the spraying device of the third aspect, the spraying tube holder is used for spraying in a state where a part of the spraying tube curved in a substantially arc shape is positioned higher than the spraying tube. Since the vicinity of both ends of a part of the tube is held by the holding parts, it is possible to prevent the spray tube from shaking during spraying, and after spraying, the residual liquid in the spray pipe is removed from the spray tube. Can be prevented from flowing to a position higher than the spray pipe, and the residual liquid in the spray pipe can be prevented from dripping from the tip of the spray tube.

According to the sprayer according to the fourth aspect, according to the third aspect.
In addition to the effects of the sprayer described above, the spraying tube receives a vertically downward force from the hanging pipe and is sprayed during the spraying because of the provision of a substantially straight hard hanging pipe connected between the spraying tube and the nozzle. The swaying of the tubing can be reliably prevented and spraying can be performed stably.

According to the spraying system of the present invention, when the pump is stopped after the spraying is completed, both the suction valve and the discharge valve are opened, and the air is sucked into the spraying pipe and the air is sprayed into the spraying pipe. Becomes atmospheric pressure and the residual liquid in the spraying pipe is discharged out of the spraying pipe, so that damage to the spraying pipe due to, for example, freezing and coagulation of the residual liquid can be prevented.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a sprayer according to the present invention.

FIG. 2 is an explanatory view showing a usage state of the sprayer with a part thereof omitted.

FIG. 3 is a system diagram showing a spraying system including the sprayer.

FIG. 4 is a front view showing an embodiment of the spraying tube holder of the present invention.

FIG. 5 is a side view showing the spraying tube holder.

FIG. 6 is a top view showing the spraying tube holder.

FIG. 7 is a bottom view showing the spraying tube holder.

FIG. 8 AA of FIG. 6 showing the spraying tube holder of the same.
It is sectional drawing.

FIG. 9 is a BB view of FIG. 6 showing the spraying tube holder;
It is sectional drawing.

FIG. 10 is a front view showing another embodiment of the sprayer of the present invention.

[Explanation of symbols]

 8 Spraying pipe 10 Pump 15 Suction valve 16 Discharge valve 21, 21a Sprayer 31 Spraying tube 41 Spraying tube holder 42 Arc 52 Holder 61 Hanging pipe 71 Micro sprinkler as nozzle 91 Nozzle L Liquid

Claims (5)

[Claims] A base end is connected to a spraying pipe, and a liquid is spouted from a tip located at a position lower than the spraying pipe so that a part of a flexible spraying tube can be inserted into and removed from the spraying pipe in a substantially arc shape. And an arc portion that is formed integrally and continuously at both ends of the arc portion,
A holding part for holding the vicinity of both ends of a part of the spraying tube so as to be able to be inserted and removed, respectively. 2. The spray tube holder according to claim 1, wherein the spray tube holder is formed of polypropylene. 3. A spraying tube having a base end connected to a spraying pipe and ejecting liquid from a lower end positioned below the spraying pipe and having flexibility, and a part of the spraying tube being sprayed with the spraying tube. A sprayer comprising: the spraying tube holder according to claim 1, wherein the spraying tube holder is held at a position higher than the spraying pipe. 4. The sprayer according to claim 3, further comprising a hard suspension pipe having a base end connected to a tip of the spray tube, and a nozzle connected to a tip of the suspension pipe. 5. A spraying pipe which is disposed substantially horizontally, and which has a base end connected to the spraying pipe and which ejects liquid from a distal end located at a lower position than the spraying pipe, and has a flexible spraying pipe. A tube, a spray tube holding device according to claim 1 or 2, which holds a part of the spray tube at a position higher than the spray pipe, and a pump that supplies a liquid to the spray pipe. A suction valve provided on the upstream side of the spraying pipe and for increasing the pressure in the spraying pipe to atmospheric pressure when the pump is stopped; and a suction valve provided on the downstream side of the spraying pipe. And a discharge valve for discharging the residual liquid to the outside of the spraying pipe in response to the opening of the spraying method.