JPH0525726Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to the structure of the liquid spraying part of a liquid spraying vehicle that reciprocates between the ridges and grooves in a greenhouse and sprays the liquid on crops, etc. on the ridges. The present invention relates to a liquid spraying section structure that includes a protection structure for a nozzle section of a liquid dispersing vehicle.

[Conventional technology]

A liquid spraying vehicle that reciprocates between the ridges and grooves in a greenhouse and sprays liquid onto crops, etc. on the ridges is equipped with a nozzle part that is supported so as to be tiltable in the front and rear directions and is held vertically when in neutral position. While traveling along the ditch, the nozzle in the nozzle part sprays liquid onto the crops on the left and right. The vines, supports, strings, etc. of crops grown on the ridges protrude above the ridges, and the nozzle part may get caught on or collide with these vines, supports, strings, etc. while the liquid spray vehicle is running. , the nozzle tube, nozzle, vine, support, etc. of the nozzle part may be cut or damaged.

Therefore, in the structure of the liquid dispersion part of the conventional liquid dispersion vehicle, a loop-shaped protector is placed between the nozzles in the longitudinal direction of the nozzle part and protrudes outward from the nozzle in the radial direction. It is installed between the nozzles in terms of direction, and the loop-shaped protector removes tendrils and the like to prevent them from wrapping around the nozzle part.

[The problem that the idea attempts to solve]

The problems with such conventional loop-shaped protectors are as follows.

(a) Since the loop-shaped protectors are arranged at intervals in the longitudinal direction of the nozzle part, if the vines, pillars, etc. are located at the height between the loop-shaped protectors, the vines, etc. The liquid passes through the loop-shaped protector and hits or wraps around the nozzle, causing damage to the nozzle.

(b) When a string, etc. that crosses the ridge gets caught in the nozzle part above the loop-shaped protector, the nozzle part tilts and can pass the string, etc., but if it gets caught in the nozzle part above the loop-shaped protector, When the nozzle part gets caught in the nozzle part, the string etc. gets caught on the lower surface side of the loop-shaped protector despite the tilting of the nozzle part, and the nozzle part cannot pass through the string etc.
The nozzle part etc. will be damaged.

An object of the invention as claimed in claim 1 is to provide a structure of a liquid spraying part of a liquid spraying vehicle which can overcome the problems (a) and (b) mentioned above.

The object of the invention according to claim 2 is to enable an obstacle such as a string to pass smoothly through the upper end of the protector when the nozzle part is tilted in the invention according to claim 1.

The object of the invention of claim 3 is that in the invention of claim 1 or 2, when the nozzle part tilts and returns to the vertical position after passing an obstacle, the nozzle part returns to the vertical position. The purpose is to quickly attenuate the swinging of the nozzle part and shorten the time it takes to return to the vertical position.

[Means to solve the problem]

This invention will be explained using reference numerals in the drawings that correspond to the embodiments.

The liquid dispersion vehicle 10, which is the premise of the structure of the liquid dispersion unit according to claim 1, is equipped with a prime mover and can move forward and backward by the drive of the prime mover, and the nozzle portion 24 is tiltable in the front and rear directions and vertically tilted in the neutral state. It is supported so as to be held in position and spreads the liquid to the left and right sides. In such a liquid dispersing vehicle 10, according to the liquid dispersing section structure of claim 1, the protector 30 extends parallel to the nozzle section 24 on the front side and the rear side of the nozzle section 24, and spreads the liquid. Obstacles 44 to the nozzle section 24 when the spreading vehicle 10 is running
collision is avoided, and the nozzle part 24 is tiltable integrally with the nozzle part 24.

In the liquid dispersing portion structure of the liquid dispersing vehicle 10 according to the second aspect, the upwardly convex curved portion 36 connects the upper end portions of the front and rear protector 30 portions.

In the liquid dispersing part structure of the liquid dispersing vehicle 10 according to the third aspect, the nozzle part 24 and the tilting support part of the protector 30 are common. This tilting support portion is connected to the cylindrical portion 52 on the main body 12 side of the liquid dispersion vehicle 10 and the nozzle portion 2.
A support shaft 64 that tilts integrally with the support shaft 64 and is inserted through the cylindrical portion 52, and a sleeve 68 that is integrally fitted into the support shaft 64 and slides frictionally against the inner circumferential surface of the cylindrical portion 52. I have it.

[Effect]

In the invention of claim 1, when the liquid dispersing vehicle 10 moves back and forth, the obstacle 44 existing in front of the nozzle section 24 does not hit the nozzle section 24.
This corresponds to the protective body 30. The protector 30 is an obstacle 44
As a result, the nozzle part 24 and the protector 30 tilt backward in the direction of movement as a unit and pass the obstacle 44 . After the obstacle 44 has passed, the nozzle portion 24 and the protector 30 return to the vertical position. Since the direction in which the liquid is sprayed from the nozzle portion 24 is left and right, the presence of the protector 30 does not interfere with spraying.

In the invention of claim 2, when the protection body 30 is tilted backward in the traveling direction of the liquid spraying vehicle 10 together with the nozzle portion 24 and the obstacle 44 passes the upper end of the protection body 30, the obstacle 44 is tilted backward in the traveling direction of the liquid spraying vehicle 10. The protective body 30 is passed through while sliding on the protective body 36.

In the third aspect of the present invention, when the nozzle part 24 and the protector 30 return from the tilted position to the neutral vertical position, the nozzle part 24 and the outer periphery of the sleeve 68 on the protector 30 side and the liquid dispersion wheel 10 at the tilt support part.
The inner periphery of the cylindrical portion 52 on the main body 12 side rotates relative to the inner periphery of the cylindrical portion 52, and frictional sliding occurs between the two, which acts as resistance to rocking of the nozzle portion 24 and the protector 30 when they return. As a result, the swinging motion of the nozzle portion 24 and the protector 30 when they return is quickly attenuated.

〔Example〕

This invention will be described below with reference to embodiments shown in the drawings.

1 and 2 are a side view and a plan view of the liquid spraying vehicle 10 with the nozzle section 24 in a vertical position, and FIG. 3 is a side view and a plan view of the liquid dispersion vehicle 10 with the nozzle section 24 in a tilted position. FIG. This liquid spraying vehicle 10 automatically reciprocates in the ridges and grooves in the greenhouse to spray liquid such as a chemical solution onto the cultivated crops on the ridges. It has a pair of left and right front wheels 14 and a rear wheel 16, and is capable of moving forward and backward by driving an internal prime mover (not shown). During liquid spraying work, the end of the hose 18 is connected to the discharge port of a pump installed at a predetermined location, and the hose 18 is extended and retracted from the rear side of the main body 12 as the liquid spray vehicle 10 moves forward and backward. ing. Handles 20 and 22 are provided at the upper ends of the front and rear surfaces of the main body 12, respectively.
is attached and held by the operator. The nozzle section 24 includes a nozzle pipe 26 that extends linearly, and nozzles 28 that are attached to the nozzle pipe 26 at appropriate intervals in the longitudinal direction and spray the liquid from the nozzle pipe 26 to the left and right sides of the liquid spreading vehicle 10. We are prepared. A pair of protection rods 30 are disposed on the left and right sides of the nozzle section 24, and each protection rod 30 is connected to the nozzle section 24.
4, the front straight part 32 and the rear straight part 34 extend parallel to the nozzle part 24 and over almost the entire length of the nozzle part 24, and The upper arcuate portion 36 is formed in an upwardly convex arcuate shape and connects the upper ends of the front straight portion 32 and the rear straight portion 34 to each other. Multiple mounting brackets 38
is the nozzle 28 in the longitudinal direction of the nozzle pipe 26.
It is fixed to the nozzle pipe 26 via a bolt 40 at a point between the protective rods 30 and the front straight section 32 and rear straight section 34 of the protective rod 30 at the front and rear ends. The connection hose 42 extends from the main body 12 and is connected to a lower portion of the nozzle pipe 26, and is connected to the hose 18.
The liquid sent from the nozzle tube 26 is guided into the nozzle pipe 26.
In FIG. 3, reference numeral 44 indicates an obstacle overhanging above the ridge, such as a vine, a support, a string, etc. of a cultivated crop on the ridge.

FIG. 4 is a cross-sectional view taken along the - line in FIG. 1. The pair of fittings 38 are aligned with each other at the center, and pinch the nozzle pipe 26 by tightening the bolt 40 and nut 46.
It is fixed to the nozzle pipe 26. protection rod 30
The front straight section 32 and the rear straight section 34 are fixed to the front and rear ends of the mounting bracket 38 by welding or the like.

5, 6, and 7 are a cross-sectional view, a plan view, and a side view of the tilting support portion of the nozzle portion 24. FIG.
The bracket 48 is fixed to the front surface of the main body 12, and the bracket 48 includes a front protrusion 50 that projects horizontally toward the front of the main body 12, a cylindrical part 52 that is provided at the front end of the front protrusion 50, and extends in the left-right direction. The cylindrical portion 5 is located at the front protruding portion 50 on the proximal side of the cylindrical portion 52.
2, and a shaft-shaped stopper 54 formed parallel to the shaft. The stay 56 is U-shaped when viewed from above, and is inserted into the cylindrical portion 52 from the front of the cylindrical portion 52 so as to sandwich the cylindrical portion 52 between the legs. The abutting tool 58 has both ends fixed to the front surface of the stay 56 by bolts 60 and nuts 62, and the nozzle pipe 26 is clamped and fixed to the stay 56 at the center. The insertion bolt 64 passes through the cylindrical portion 52 together with the left and right legs of the stay 56, and works together with the nut 66 to tighten the left and right legs of the stay 56. The sleeve 68 is interposed between the inner periphery of the cylindrical portion 52 and the periphery of the bolt 60, is fixed to the periphery of the insertion bolt 64, and has an outer periphery that frictionally slides against the inner periphery of the cylindrical portion 52. It is possible to move. The stay 56, bolt 60, nut 62, and sleeve 68 tilt integrally with the nozzle pipe 26 around the axis of the insertion bolt 64, and with this tilting, the inner circumferential surface of the cylindrical portion 52 and the outer circumferential surface of the sleeve 68 rotate and slide relative to each other. The forward biasing torsion spring 70 and the backward biasing torsion spring 72 have their coil portions fitted onto the outer circumferential side of the cylindrical portion 52 on both sides of the front protrusion 50, and both ends of which are fitted to the stay 56 and the front protrusion 50. When the nozzle tube 26 is locked, a biasing force is generated on the stay 56 in a direction to tilt the nozzle pipe 26 forward and backward, respectively. In the vertical position of the nozzle portion 24 (FIG. 1), the forward biasing torsion spring 70 and the rear biasing torsion spring 72
The end of the stay 56 side contacts the stopper 54 and is prevented from being displaced, so the nozzle portion 24
is held in a vertical position without receiving any biasing force from the forward biasing torsion spring 70 and the rear biasing torsion spring 72. When the upper end of the nozzle section 24 is tilted forward, the rear biasing torsion spring 72 is compressed, and the nozzle section 24 receives a biasing force in the vertical position direction from the rear biasing torsion spring 72. When the upper end of the portion 24 is tilted rearward, the forward biasing torsion spring 70 is compressed, and the nozzle portion 24 receives a biasing force from the forward biasing torsion spring 70 in the vertical position direction. The portion 24 is always biased toward the vertical position.

The operation of the embodiment will be explained.

While the liquid spray vehicle 10 is running, the nozzle 28 receives liquid such as a chemical liquid from a pump (not shown) at a predetermined location in the house via the hose 18, the connecting hose 42, and the nozzle pipe 26, and converts this liquid into a liquid. Sprayer vehicle 1
0 to the left and right side crops. protection rod 30
are not present on the left and right sides of the nozzle part 24, so the protective rod 3 is not present in the spraying of liquid from the nozzle 28.
0 being an obstacle is avoided.

When the liquid spraying vehicle 10 moves back and forth, an obstacle 44 such as a crop vine that exists in front of the nozzle part 24
does not hit the nozzle part 24, but hits the front straight part 32 (when moving forward) or the rear straight part 34 (when moving backward) of the protection rod 30. The front straight part 32 or the rear straight part 34 receives a force that tilts it backward in the direction of travel due to the collision with the obstacle 44, and as a result, the sleeve 68 and the cylindrical part 52 of the bracket 48 rotate relative to each other, and the nozzle part 24 And the protection rod 30 has a forward biasing torsion spring 70 (when moving forward) or a backward biasing torsion spring 72 around the axis of the insertion bolt 64.
(at the time of retreating), the vehicle tilts integrally backward in the direction of travel and passes through the obstacle 44. When the obstacle 44 passes through the protection rod 30, the obstacle 44 passes through the front straight part 32 or the rear straight part 34 while sliding on the upper arcuate part 36 of the protection rod 30.
The obstacle 44 passes smoothly over the upper end of the protection rod 30 without being caught by the protection rod 30.

After the obstacle 44 has passed, the return force of the forward biasing torsion spring 70 or the rear biasing torsion spring 72 causes the nozzle portion 24 and the protection rod 30 to return to the vertical position. Nozzle part 24 and protection rod 30
When the sleeve 68 on the nozzle part 24 side returns from the tilted position to the neutral vertical position, the sleeve 68 on the nozzle part 24 side
and the cylindrical portion 52 on the main body 12 side of the liquid spraying vehicle 10
Frictional sliding occurs between the nozzle part 24 and the inner periphery of the nozzle part 24 and the protection rod 30, which acts as resistance to rocking when the nozzle part 24 and the protection rod 30 return.
As a result, the swinging of the nozzle section 24 and the protection rod 30 is quickly attenuated, and the nozzle section 24 and the protection rod 30 are quickly returned to their vertical positions.

When the sleeve 68 is made of an elastic member, the sleeve 68 expands in the radial direction due to an increase in the tightening force of the insertion bolt 64 and the nut 66, thereby increasing the frictional force between the sleeve 68 and the cylindrical portion 52. Therefore, by changing the tightening force of the insertion bolt 64 and the nut 66, the frictional force between the sleeve 68 and the cylindrical portion 52 can be adjusted.

In the illustrated embodiment, a protective rod 30 is used as the protector, but a plate-shaped protector extending parallel to the nozzle portion 24 and covering the front and rear sides of the nozzle portion 24 may also be used. is also possible.

[Effect of idea]

In the device of claim 1, the nozzle part protector extends parallel to the nozzle part on the front and rear sides of the nozzle part and prevents obstacles from hitting the nozzle part, so that the nozzle part can be protected even if there are obstacles. First, it is possible to reliably prevent obstacles from hitting the nozzle part, and to prevent damage to the nozzle part, crop vines, supports, etc. In addition, when the nozzle part and the protector tilt, obstacles such as strings will not get caught on the underside of the protector, making it difficult to pass through the protector, and the pull between the protector and the obstacle will not occur. It is also possible to prevent getting stuck.

In the invention of claim 2, the upper ends of the protectors on the front and rear sides of the nozzle part are connected by an upwardly convex curved part, so that when the protectors tilt and pass an obstacle, can be passed smoothly by sliding it on a straight line.

In the invention of claim 3, the nozzle part and the tilting support part of the protector have a friction rotation sliding part between the inner periphery of the cylindrical part and the outer periphery of the sleeve. This frictional rotation sliding portion can secure a sufficiently wide area and generates a large motion resistance against the swinging of the nozzle portion and the protector when returning from the tilted position to the vertical position. This speeds up the attenuation of the oscillation that occurs when returning.
The nozzle part and the protector can be quickly returned to the vertical position.

[Brief explanation of drawings]

The drawings relate to an embodiment of this invention; FIGS. 1 and 2 are a side view and a plan view of the liquid spraying vehicle with the nozzle section in a vertical position, and FIG. 3 shows the nozzle section in a tilted position. A side view of the liquid spray vehicle, shown
Figure 4 is a cross-sectional view taken along the - line in Figure 1;
6 and 7 are a cross-sectional view, a plan view, and a side view of the tilting support portion of the nozzle portion. 10...Liquid spray vehicle, 12...Main body, 24...
Nozzle part, 30...Protective rod (protector), 36
... Upper arc part (curved part), 44 ... Obstacle, 5
2... Cylinder part, 64... Insertion bolt (support shaft), 68
……sleeve.

Claims (1)

[Claims for Utility Model Registration] (1) It is equipped with a prime mover, and is capable of moving forward and backward by the drive of the prime mover, and the nozzle part 24 is tiltable in the front and rear directions and is held in a vertical position when in neutral. In the liquid spraying vehicle 10 that is supported and sprays liquid to the left and right sides, the protector 30 is
On the front side and rear side of the nozzle part 24,
It extends parallel to the nozzle section 24 to avoid collision of an obstacle 44 with the nozzle section 24 when the liquid dispersing vehicle 10 is running, and is tiltable integrally with the nozzle section 24. A structure of a liquid spraying part of a liquid spraying vehicle characterized by: (2) The structure of a liquid dispersing portion of a liquid dispersing vehicle according to claim 1, wherein the upwardly convex curved portion 36 connects the upper ends of the front and rear portions of the protector 30. (3) The nozzle portion 24 and the protector 30 have a common tilting support portion, and this tilting support portion tilts integrally with the cylindrical portion 52 on the main body 12 side of the liquid spraying vehicle 10 and the nozzle portion 24. It has a support shaft 64 that is inserted through the cylindrical portion 52, and a sleeve 68 that is integrally fitted into the support shaft 64 and slides frictionally against the inner circumferential surface of the cylindrical portion 52. The structure of a liquid spraying part of a liquid spraying vehicle according to claim 1 or 2, characterized in that: