JP2595581Y2 - Nozzle boom device - Google Patents

Description

[Detailed description of the invention]

[0001]

[Industrial applications] This invention is applied to agricultural chemicals,
The present invention relates to a nozzle / boom device attached to a liquid sprayer or the like for spraying liquid such as liquid fertilizer or water, and more particularly, to a column (nozzle boom) for attaching a nozzle, which is configured to bend substantially at an intermediate portion. To improved nozzle and boom devices.

[0002]

2. Description of the Related Art In various orchards and the like, a liquid spraying vehicle is used in which an operator rides and sprays the chemical solution or the like.

[0003] This type of liquid spraying vehicle is generally configured, for example, as follows.

[0004] First, a column (nozzle boom) is attached to the rear of the fuselage. The aircraft travels when a worker rides and drives. A tank for storing a liquid such as a chemical solution or water is mounted on a rear portion of the body.

[0005] The support column is provided with an appropriate number of nozzles toward the left and right sides in the traveling direction of the body. Each of these nozzles is supported by the column so that the nozzle head swings, and all the nozzles are configured to swing together. The spraying liquid can be efficiently sprayed over a wide range by swinging the nozzle in conjunction with the operation of a driving device provided on the machine body.

In the spraying vehicle having the above-described structure, it is preferable that the column is lengthened and the liquid is sprayed from a higher position in order to widen the spraying range of the spraying liquid.

On the other hand, if the column is protruded long upward, there is an inconvenience that the column is obstructed at the time of transporting the spreader or storing it in a warehouse.

Conventionally, therefore, the struts have been constructed so that they can be bent forward of the fuselage, and the struts are stored in a warehouse in a folded state. That is,
The support was divided into an upper support and a lower support around its middle part, and both were hinged.

[0009]

However, in the prior art, when traveling between trees in an orchard with the upper support standing upright on the lower support, the upper support that extends long upward is not suitable. Sometimes they hit or caught tree branches.

[0010] Further, if the upper column is accidentally forgotten to bend in the forward direction of the fuselage and stored in the warehouse, and the upper column is collided with a low warehouse entrance, it is considered that the upper column collides with a low warehouse entrance. Can be

In the above case, the impact caused by the collision between the upper support and the tree branch is directly transmitted to the mounting portion between the lower support and the body, and the mounting portion and each support are damaged. There was a danger to do.

The present invention has been made in view of the above circumstances, and even when an overload is applied to the upper support in the longitudinal direction of the body, a mounting portion between each of the supports or the lower support and the body is provided. It is an object of the present invention to provide a nozzle / boom device having a so-called safety trip function, which is less likely to be damaged.

[0013]

In order to solve the above-mentioned problems, a nozzle boom device according to the present invention includes a lower column attached to a traveling body, an upper column provided at an upper end of the lower column, and a column. A nozzle that is attached to the nozzle and sprays the liquid; a connecting member that is provided integrally with one of the columns and connects the columns so as to be able to bend to each other in the front-rear direction of the traveling body. A plate member rotatably provided on the member and fixed and releasable on the other column side, and inserted through the plate member and the connecting member to integrate these two members with each other; Replacement that is cut by a shear load generated between the connecting member and the plate member when an overload in the front-rear direction of the traveling body is applied to the upper support standing on the lower support. Those constructed from the ability of the insertion member.

[0014]

In the nozzle / boom device according to the present invention, the upper column is erected on the lower column attached to the traveling body,
The liquid is sprayed from a nozzle provided on the support.

The upper support is erected on the lower support as follows.

First, a connecting member is integrally provided on one of the two columns, and the two columns are refractably connected to each other by this connecting member. That is, the relative position of the connecting member is not always changeable with respect to the one column.

On the other hand, a plate member is fixedly and releasably disposed on the other column side. This plate member is provided so as to be rotatable by being superimposed on the connecting member. If necessary, the plate member may be fixed to the other column side by an appropriate means, so that the plate member is relatively fixed to the other column. The position cannot be changed.

[0018] The plate member is integrated with the connecting member by an insertion member inserted between the plate member and the connecting member.

[0019] As described above, the upper support that is connected to the lower support by the connecting member so as to be able to bend is placed in an upright state with respect to the lower support via the plate member and the insertion member. Can be fixed.

Here, when the fixed state of the plate member with respect to the other column is artificially released, the fixed upright state of the upper column with respect to the lower column is released, and the upper column is moved in the longitudinal direction of the traveling body. Can be beaten.

On the other hand, when the upper support is standing and fixed on the lower support and an overload is applied to the upper support in the front-rear direction of the traveling body, the following occurs.

First, since the plate member is fixed to the other column side, the relative position with respect to the other column does not change. Similarly, since the connecting member is provided integrally with the one support, the relative position with respect to the one support does not change.

For this reason, when an overload of the traveling body in the front-rear direction is applied to the upper support, the connecting member and the plate member rotate relatively in opposite directions while overlapping. As a result, the insertion member inserted across the connection member and the plate member is cut by a shear load generated between the connection member and the plate member,
An integral relationship between the connecting member and the plate member is released. In this manner, the fixed upright state of the upper support with respect to the lower support is released in response to the overload applied to the upper support, and the upper support buffers the overload in the front-rear direction of the traveling body so that the upper support buffers the overload. You can escape freely.

Therefore, even when an overload of the traveling body in the front-rear direction is applied to the upper support, there is little risk of damage to the mounting portion between the lower support and the traveling body and each of the supports.

In order to return the upper support to the upright state, a new insertion member is replaced with the connection member instead of the insertion member cut by the shear load generated between the connection member and the plate member. What is necessary is just to insert it over a board member.

[0026]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 schematically shows a liquid sprayer equipped with a nozzle / boom device according to an embodiment of the present invention. In the drawing, reference numeral 1 denotes a traveling body of the liquid sprayer, 2 denotes a driver's seat, and 3 denotes a traveling device. A tank 4 is provided on the traveling body 1 at a position behind the driver's seat 2. The tank 4 stores a spray liquid such as a pesticide.

A body hitch 5 is provided at the rear of the traveling body 1.
The main body hitch 5 is directly mounted with the nozzle / boom device 6 of the present invention.

The nozzle / boom device 6 (the piping system for the spray liquid which is not related to the gist of the present invention is omitted) is shown in FIG.
As shown in the figure, the upper support 7 and the lower support 8 are vertically connected, and the upper support 7 is bent in the front-rear direction of the traveling body 1 and falls down.

The upper support 7 and the lower support 8 are both formed by joining metal members having a U-shaped cross section so as to face each other so that a space is formed therein. As shown in FIG. 3, a shaft member 9 is horizontally inserted into the upper portion of the lower support 8 with both ends protruding toward both left and right sides in the traveling direction of the traveling body 1. The shaft member 9 is held at the upper end of the lower support 8 via a bearing 10 so that the shaft member 9 can rotate freely (hereinafter, this shaft member 9 is referred to as a “connection portion rotating shaft”). .

The lower end of the upper support 7 and the lower support 8
The upper end portion of the left and right corresponding side surfaces are connected members 3
1, 32 are connected. These connecting members 31, 3
2 is fixedly attached to the upper column 7 with an appropriate fixing tool 33 such as a rivet, a bolt and a nut, while the lower column 8 is centered on the rotation axis X1 of the connecting portion rotation shaft 9. The traveling body 1 is connected so as to rotate in the front-rear direction.

In the embodiment shown in the drawings, as shown in FIG. 3, which is a cross-sectional view taken along the line III-III of FIG. 4, first, covers 34, 35 are attached to the left and right sides of the upper portion of the lower support 8. These covers 34 and 35 cover both ends of the connecting portion rotating shaft 9 projecting left and right from the upper end of the lower support 8. Circular protrusions 36 and 37 are provided on the surfaces of the covers 34 and 35, respectively. The centers of the circular protrusions 36 and 37 are located on an extension of the rotation axis X1 of the connecting portion rotation shaft 9.

In the illustrated example, connecting plates are used as the connecting members 31 and 32, and circular holes 3 fitted with the circular protruding portions 36 and 37 are formed below the connecting plates 31 and 32.
8, 39 are provided. And the circular projection 3
After the connecting plates 31, 32 are fitted to the covers 34, 35 so that the circular holes 38, 39 fit into the circular holes 38, 39, the lid members 15, 15 are connected to the circular projections 36, 35 from above. 37. As a result, the connecting plates 31 and 32 are rotatable around the circular projections 36 and 37 in the front-rear direction of the traveling body 1.

The upper portions 31a, 32 of the connecting plates 31, 32
As described above, a is fixed to the left and right side surfaces of the lower end of the upper column 7 by the fixing members 33.

Further, in the illustrated example, the upper support 7 is held upright during operation, and the lower support 8 is held.
The traveling body 1 is mounted on the upper support 7 erected above.
When an overload is applied in the front-rear direction, the following structure is used to reduce the impact of the overload on the mounting portion between the lower column 8 and the traveling body 1. Has been adopted.

First, one of the circular protrusions 36, 37 (in the illustrated example, the right circular protrusion 37 in FIG. 3) protrudes slightly longer. A plate member 40 is mounted on the circular projection 37 so as to overlap the outside of the connection plate 32. This plate member 40
Has a circular hole 41 at a substantially central portion thereof which is compatible with the circular protrusion 37.
7, and the cover member 15 is fixed from above,
It is provided so as to be able to rotate independently of the connecting plate 32 around the circular protrusion 37.

The plate member 40 is connected to the connecting plate 32 at its upper portion by screwing a small-diameter bolt 42 as an insertion member. That is,
Screw holes 43 and 44 having the same diameter are provided at positions corresponding to the plate member 40 and the connecting plate 32 (see FIG. 6), and the small-diameter bolt 42 is screwed over these screw holes 43 and 44. Have been.

The small-diameter bolt 42 integrates the plate member 40 and the connecting member 32, and a shear load greater than a predetermined value is applied between the plate member 40 and the connecting member 32. Sometimes it is called a fuse bolt or a shear bolt having a strength that is easily cut by the shear load.

The plate member 40 can be fixed to and released from the lower support 8 using appropriate fixing means.

That is, in the illustrated example, in the illustrated example, the upper column 7 has an upright shape, and the lower edge 45 thereof has an arc shape centered on the rotation axis X1. The connecting plate 32 extends downward longer than the connecting plate 32 (see FIG. 3). A recess 46 is formed at the center of the arc of the lower edge 45 of the plate member 40.

On the other hand, a convex portion 48 which engages with the concave portion 46 formed on the lower edge 45 of the plate member 40 is provided at one end above the lower support 8 and below the plate member 40. The lock lever 47 is supported by a pivot shaft 49.
The lock lever 47 is urged upward by the coil spring 50 so that the convex portion 48 always engages with the concave portion 46 of the plate member 40, so that the lock lever 47 does not rotate around the circular protrusion 37 during work. The plate member 40 is fixed to the lower support 8.

Then, the handle 51 at the lower end of the lock lever 47 is gripped, and the lock lever 51 is pivoted about the pivot shaft 49 against the urging force of the coil spring 50.
Is rotated rearward, the engagement between the projection 48 and the recess 46 is released, and the fixed relationship between the plate member 40 and the lower support 8 is released.

In the drawing, reference numeral 52 denotes a guide slit formed in an arc shape on the lock lever 47 about the pivot shaft 49. Reference numeral 53 denotes a guide slit which is inserted into the guide slit 52 and screwed into the lower column 8. Stopper bolts, which are provided for the purpose of stably rotating the lock lever 47.

In FIG. 1, reference numeral 54 denotes a coil spring provided between the rear portion of the left connecting plate 31 and the upper portion of the lower support 8 as viewed in FIG. The coil spring 54 urges the upright upper column 7 and the lower column 8 lightly so as to be in close contact with each other, thereby preventing the upper column 7 from rattling and allowing the upper column 7 to fall forward. The required force when raising the column 7 is reduced.

In the illustrated example, the upper support 7 and the lower support 8 have an appropriate number of shaft members 16a, 16b, 17 respectively.
a, 17b, and 17c are provided so as to penetrate the columns 7 and 8 horizontally to the left and right, with an appropriate interval therebetween. These shaft members 16a, 16b, 17
Both ends of a, 17b, and 17c protrude to the left and right sides of the columns 7 and 8 (see FIG. 3). The shaft members 16a, 16b, 17a, 17b, 17c are supported by the columns 7, 8 via bearings 18, respectively, and the columns 7, 8 are respectively rotated so as to freely rotate around the axis X2. (Hereinafter, the shaft members 16a and 16b provided on the upper column 7 are referred to as "upper column cam drive shafts", and the shaft members 17a and 17 provided on the lower column 8 are referred to as "cam shafts".
b, 17c are referred to as “lower column cam drive shaft”).

Each of the upper column cam drive shafts 16a, 16
b, the lower column cam drive shafts 17a, 17b, 17c and the connecting portion turning shaft 9 are all connected to each other by an appropriate transmission means so as to turn in conjunction with each other.

That is, for example, each of the upper column cam drive shafts 16a, 16b and each lower column cam drive shaft 17a, 1
Two sprockets 19 are respectively mounted on the left and right sides of the connecting portion rotating shaft 9 and the connecting portions 7b and 17c. These sprockets 19 are located in the columns 7 and 8. The sprockets 19 mounted on the vertically adjacent rotating shafts are connected by an endless chain 20. As a result, if a rotational force is applied to any of the rotation shafts, all the cam drive shafts 16a, 16b,
17a, 17b, 17c and the connecting portion rotating shaft 9 rotate in conjunction with each other.

In the embodiment shown in the drawings, a driving device 21 such as a motor is mounted below the lower support 8 so that its drive shaft 22 projects into the lower support 8, and transmission means such as an appropriate chain or sprocket is used. , The rotational force is appropriately reduced and transmitted from the drive device 21 to the lowermost cam drive shaft 17c of the lower support 8.

Each of the upper column cam drive shafts 16a, 16b
And each of the lower column cam drive shafts 17a, 17b, 17c.
Eccentric cams 23 each having a circular cross-section are attached to both outer ends of the cam. These eccentric cams 23 have a larger outer diameter than the cam drive shafts 16a, 16b, 17a, 17b, 17c and have an appropriate thickness. Each of the eccentric cams 23 has a cam drive shaft 16a, 16b,
The rear ends 25a of the nozzle tubes 25 are mounted via spherical bearings 24 disposed radially outward from the axis X2 of 17a, 17b, 17c. As a result, the cam drive shafts 16a, 16b, 17a, 17b, 17c
Is rotated, the rear end 25a of each nozzle tube 25 is correspondingly moved to each of the cam drive shafts 16a, 16b, 17a,
A circular motion is performed about the axis X2 of 17b and 17c.

Each of the nozzle tubes 25 extends to the left and right sides of the body 1. Each nozzle tube 25 is designed to have an appropriate length so as not to be too long. If it is too long,
This is because there is a great risk that the spraying vehicle will be caught by tree branches or the like when traveling between trees in the orchard. In order to avoid the same danger, the left and right widths of the upper column 7 and the lower column 8 are made as narrow as possible, and the left and right projections of the nozzle tube 25 held by the columns 7 and 8 are shortened. It is desirable to do.

Each of the nozzle tubes 25 is supported by a U-shaped support member 26 in the middle of its length direction. Both ends of each nozzle tube 25 can freely swing up and down around the horizontal pivot shaft fulcrum 27. The U-shaped support member 26
Is attached to the tip of the bracket 28 so as to be rotatable around the vertical axis X3. The bracket 28 is attached to the left and right side surfaces of the upper support 7 and the lower support 8, respectively, and the U-shaped support member 26
The nozzle tube 25 is supported through the nozzle.

The spray liquid stored in the tank 4 is sent to each of the nozzle pipes 25 via a pump (not shown), and an appropriate braking force is applied to the swing of the nozzle pipes 25 to smooth the movement. Each of the nozzles 25 is provided with a nozzle 30 for spraying a spray liquid over a wide range.

The oscillating mechanism of each nozzle tube 25 and the bent portions of the upper column 7 and the lower column 8 are covered with an appropriate cover so that the spray liquid or the like sprayed by the nozzle 30 can enter. Is preferably prevented.

Next, the operation of the nozzle / boom device of this embodiment configured as described above will be described.

When performing the spraying operation, the upper support 7
Is released by a worker's hand on the lower support 8 with the aid of the coil spring 54 after releasing the locking device for the body 1 (not shown).

The connecting plate 3 is provided at the lower end of the upper support 7.
1 and 32 are provided integrally, and the two supporting columns 7 and 8 are refractively connected to each other by the connecting plates 31 and 32. Therefore, the connection plates 31 and 32 are connected to the upper support 7.
Relative position cannot always be changed.

On the other hand, the plate member 40 is provided so as to be rotatable separately from the connecting plate 32 around the circular projecting portion 37 so as to overlap with the connecting plate 32.

Here, the plate member 40 is
The small-diameter bolt 42 inserted between the connecting plate 32 and the connecting plate 32 is integrated with the connecting plate 32.

For this reason, the operator supports the upper support 7 by hand and stands on the lower support 8, and the plate member 40 is fixed to the lower support 8 by the lock lever 47 so as not to rotate. If the upper support 7 is connected to the connecting plate 3
1, 32, the plate member 40 and the small-diameter bolt 42 are fixed to the lower support 8 in an upright state (see FIG. 4).

When the upper support 7 is erected as described above and the driving device 21 is operated, the lower support 8
The lower column cam drive shaft 17c provided on the lowermost side rotates. The rotational force of the lower column cam drive shaft 17c is applied to all the rotation shafts (lower column cam drive shafts 17b and 17a,
Connecting part rotating shaft 9 and upper column cam drive shafts 16b, 16
a).

Each of the lower column cam drive shafts 17a, 17
b, 17c and the upper column cam drive shafts 16a, 16
b, the eccentric cams 23 provided at both outer ends of the respective cam drive shafts cause the nozzle pipes 2 to rotate.
5, a rear end portion 25a makes a circular motion about the axis X2 of each cam drive shaft.

Here, each of the nozzle tubes 25 is supported by each of the U-shaped support members 26 such that both ends thereof freely swing up and down. Further, each of the U-shaped support members 26 is
Each bracket 28 is supported so as to freely rotate around a vertical axis X3. Therefore, when the rear end portion 25a of each nozzle tube 25 makes a circular motion, each nozzle tube 25 swings up and down around the pivot shaft 27 and the vertical movement of the U-shaped support member 26. Axis X of direction
3, the nozzle tube 25
, That is, each nozzle 30 also makes a swinging motion at the same time.

In this way, each nozzle 30 swings in an interlocking manner without difficulty, and the spray liquid stored in the tank 4 is sprayed over a wide area on both left and right sides in the traveling direction of the traveling machine body 1. It is possible to do.

In an orchard or the like, when traveling between trees with the upper support 7 standing, the upper support 7 is attached to thick branches 55 extending from the left and right sides of the travel path.
May collide and get caught.

In such a case, the nozzle according to the present embodiment
According to the boom device, a so-called safety trip function operates as shown in FIG.

That is, the upper strut 7 is used for the tree branch 5 or the like.
When the vehicle 5 collides, the traveling body 1 is moving forward,
For the upper support 7 that has collided with a tree branch 55 or the like,
A strong load is applied to the rear of the traveling body 1.

When a strong rearward load is applied to the upper column 7, the connecting plates 31, 32 fixed to the lower end of the upper column 7 also move rearward around the circular projections 36, 37. Attempts to rotate. On the other hand, the connection plate 32
And the plate member 4 integrated with the small-diameter bolt 42
Numeral 0 is non-rotatably held by the lock lever 47 with respect to the lower column 8 side.

For this reason, when a strong load is applied to the upper support 7 behind the traveling body 1, a large shear load is generated between the connecting plate 32 and the plate member 40.

As a result, the small-diameter bolt 42 is cut by the shear load, the upper support 7 escapes to the rear of the traveling body 1, and the impact caused by the collision with the tree branch 55 or the like is reduced. Therefore, it is possible to prevent the mounting portion between the lower column 8 and the traveling body 1 and the columns 7 and 8 from being damaged by the impact of the collision, and to prevent the tree branches 55 and the like 55 that collided with the upper column. Damage can be avoided.

In order to restore the upper support 7 after the small diameter bolt 42 has been cut, an operator sets the inclined upper support 7 upright on the lower support 8 and sets the plate member 40 up.
The screw holes 43 and 44 of the connecting plate 32 are made to coincide with each other, and a new small-diameter bolt 42 may be screwed over the screw holes 43 and 44 in place of the cut small-diameter bolt 42.

On the other hand, when storing the spraying vehicle provided with the nozzle / boom device in the illustrated example in a warehouse or the like, the handle 51 of the lock lever 47 is pulled backward, and The engagement state of the plate member 40 with the concave portion 46 is released, and the fixed state of the plate member 40 to the lower support 8 side is artificially released. Then, the fixed upright state of the upper support 7 with respect to the lower support 8 is released, and the upper support 7 can be pulled down by hand to the upper side of the tank 4 and forward of the traveling body 1 (FIG. 5). reference).

The upper column 7 is configured to be tilted forward and backward about the rotation axis X1 of the connecting portion rotation shaft 9. However, even if the upper column 7 is tilted, each of the columns 7, 8 can be moved.
There is no effect on the mechanism provided inside.

In this embodiment, the connecting plates 31, 3
2 is fixed to the lower part of the upper support 7, and the plate member 40 is fixed to and released from the lower support 8 by a lock lever 47 provided on the lower support 8 side.
Conversely, the connecting portion between the upper support 7 and the lower support 8 shown in FIG. 3 is turned upside down, that is, the connecting plate is fixed on the upper portion of the lower support, and the plate member is provided on the upper support side. It goes without saying that the same operation and effect as described above can be obtained even if the lock lever is fixed and released freely with respect to the upper column side.

[0074]

According to the nozzle / boom device of the present invention, when the traveling body is run with the upper support upright, an overload is applied to the upper support in the front-rear direction of the traveling body. However, only the insertion member that couples the connecting member and the plate member is damaged, and the overload is not directly transmitted to an attachment portion between the lower support and the traveling body. Therefore, there is an effect that the risk of damage to the main part of the device during use is reduced.

In order to restore the upper support, it is only necessary to replace the damaged insertion member with a new one, so that there is an advantage that the repair work is easy and the cost is low.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a liquid sprayer equipped with a nozzle / boom device according to an embodiment of the present invention, as viewed obliquely from the left rear.

FIG. 2 is an overall perspective view showing the internal structure of the nozzle / boom device shown in FIG.

FIG. 3 is a vertical sectional view of a main part of the nozzle / boom device (I in FIG. 4);
FIG. 2 is a sectional view taken along the line II-III.

FIG. 4 is a perspective view of a connecting portion between an upper support and a lower support as viewed obliquely from the rear right of the application vehicle.

FIG. 5 is a perspective view of a connecting portion between the upper support and the lower support, showing a state where the upper support is tilted forward of the traveling body.

FIG. 6 is a perspective view of a connecting portion between the upper column and the lower column, showing a state in which the upper column is released backward.

[Explanation of symbols]

 Reference Signs List 1 traveling body 7 upper support 8 lower support 30 nozzle 32 connecting member 40 plate member 42 insertion member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B05B 17/00 A01M 7/00 F16B 7/00

Claims (1)

(57) [Scope of request for utility model registration] 1. A lower support (8) attached to a traveling body (1), an upper support (7) provided at an upper end of the lower support (8), and a liquid attached to the support (7, 8). Nozzle (30), which is provided integrally with one of the columns (7, 8), and the columns (7, 8) are attached to the traveling body (1). A connecting member (32) that is connected to be able to bend in the front-rear direction with each other; )
And the plate (40) and the connecting member (32) are inserted so as to integrate these two members (40, 32) with each other, and the upper column (8) standing on the lower column (8). 7) A replaceable insertion member that is cut by a shear load generated between the connecting member (32) and the plate member (40) when the traveling body (1) is overloaded in the front-rear direction on the traveling body (1). (42) A nozzle / boom device comprising: