JP2011172495A - Working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working vehicle equipped with a chemical-scattering device hardly having the risk of a boom being damaged by the contact of the tip part of a side boom with a wall or the like of a barn at such the time of going into or out of a barn which is a narrow space, even having the boom to be stored along the longitudinal direction of a vehicle body. <P>SOLUTION: The traveling adaptability when going into or out of the narrow barn or when traveling on a narrow crank road is extremely improved than the conventional one because the side boom 9b can be turned by about 90° outward from a boom-storing position, and also the side boom 9b can be turned to the inside of the boom-storing position by an arbitrary prescribed angle from the boom-storing position, and the minimum turning radius of the working vehicle is made smaller while preventing the damage by the interference of the right and left side booms 9b and 9b with each other to enable the small turn because the angle of the maximum inward turning of the side boom 9b is restricted to the position at which the right and left side booms 9b and 9b are not interferes with each other. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a work vehicle equipped with a chemical solution spraying device for spraying drugs and the like.

  2. Description of the Related Art Conventionally, there has been known a configuration in which a zoom sprayer is attached to a work vehicle (passenger management machine) to spray a medicine. Such a working vehicle has a chemical spraying device that spreads a chemical spray on a crop by spreading a zoom sprayer with a spray nozzle in the left and right lateral directions at the front or rear of the machine body. The zoom sprayer is configured to be stowable. For example, in a configuration in which a boom is attached to the front of the fuselage, the center boom fixed to the front of the fuselage and the left and right sides of the center boom are pivoted around the front and rear axes or stored horizontally. What consists of the left and right side boom comprised so that expansion | deployment was possible is known.

JP 2008-182972 A

  The zoom sprayer described in Patent Document 1 generally has a configuration in which the boom is pivoted outwardly within a range of 90 degrees from the position where the side boom is housed in parallel along both side surfaces of the fuselage. The minimum turning radius of the side boom tip becomes large due to the operation of entering / exiting the work vehicle at or the narrow crank path, and the boom hits against the wall of the barn or the like, which may cause damage.

  Therefore, the problem of the present invention is that even if the boom is stored along the longitudinal direction of the vehicle body, when the work vehicle enters and leaves the barn, which is a narrow space, the tip of the side boom is located on the wall of the barn. It is an object of the present invention to provide a work vehicle equipped with a chemical solution spraying device that is not likely to be damaged by being hit.

  The problems of the present invention are solved by the following means.

  According to the first aspect of the present invention, a chemical solution is supplied from a chemical solution tank (5) that stores a chemical solution installed on the vehicle body (1) to a chemical solution spray boom (9) that sprays the chemical solution installed on the vehicle body (1). The spray boom (9) has a center boom (9a) fixedly disposed in front of the vehicle body (1) and left and right ends that are connected to both sides of the center boom (9a). It consists of side booms (9b, 9b), and the left and right side booms (9b, 9b) are rotated approximately 90 degrees outward from the vehicle body (1) from the position where they are housed along the longitudinal direction on both sides of the vehicle body (1). The position of the center boom (9a) can be changed so that it can be moved along the longitudinal direction of the center boom (9a), and at least one side boom (9b or 9b) is stored along the longitudinal direction of the vehicle body (1). From the position where the car body ( It is a chemical spraying work vehicle, characterized by being configured to be rotated by a predetermined angle to the center line direction of the front and rear direction).

  According to the second aspect of the present invention, the side booms (9b, 9b) are rotated at a predetermined angle from the position where the side booms (9b, 9b) are housed along the longitudinal direction on both sides of the vehicle body (1) in the longitudinal direction of the vehicle body (1). 2. The chemical solution spraying work vehicle according to claim 1, further comprising a configuration in which the tip ends of both side booms (9 b, 9 b) are rotated to a position where they do not interfere with each other in a moving state.

  According to a third aspect of the present invention, a driver's seat (6) is provided on the vehicle body (1), and the side booms (9b, 9b) are stored from both sides of the vehicle body (1) along the longitudinal direction. In a state in which the vehicle body (1) is rotated by a predetermined angle in the center line direction in the front-rear direction, a configuration is provided in which both side booms (9b, 9b) are pivoted so as to avoid the upper position of the driver seat (6). It is a chemical | medical solution spraying work vehicle of Claim 1 characterized by these.

  According to the first aspect of the present invention, the side booms 9b, 9b can be turned approximately 90 degrees (referred to as outward rotation) from the boom storage position along the longitudinal direction to both sides of the vehicle body 1 to the side. , 9b can be rotated inward at an arbitrary angle from the boom storage position along the longitudinal direction of the vehicle body 1 (referred to as internal rotation), so that the work vehicle can enter and exit the narrow barn. In addition, the adaptability to travel on narrow crank roads has been greatly improved.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, both side booms 9b, 9b are rotated from the boom storage position along the longitudinal direction of the vehicle body 1 toward the inside of the vehicle body 1. Since the construction is possible, it is possible to improve the adaptability of the work vehicle to / from a narrow barn and the traveling adaptability of a narrow crankway. In addition, since the maximum angle of the internal rotation of both the side booms 9b and 9b is set to a position where the left and right side booms 9b do not interfere with each other, damage due to interference between the left and right side booms 9b and 9b is prevented. However, the minimum radius of the work vehicle can be made smaller and a small turn is possible.

  According to the third aspect of the invention, in addition to the effect of the first aspect of the invention, the side boom 9b that has been turned inward to the upper position of the driver's seat 6 regardless of the position of the driver's seat 6 in the vehicle body 1. , 9b, the safety angle of the driver's seat 6 can be secured, and the sprayed chemical solution using the side booms 9b, 9b does not drop directly on the operator, so there is an advantage that no chemical damage occurs. is there.

It is a side view of the work vehicle which attached the chemical | medical solution spraying apparatus of embodiment of this invention. It is a top view of the work vehicle of FIG. It is a front view of the work vehicle of FIG. 1 is a front view of a work vehicle according to an embodiment of the present invention. 1 is a front view of a work vehicle according to an embodiment of the present invention. FIG. 3 is an enlarged plan view of a front portion of the work vehicle of FIG. 2. It is a top view of the working vehicle which compares and demonstrates the rotation state of the side boom in the side of the storage warehouse of the working vehicle of FIG. 1 and the conventional working vehicle. 1 is a plan view of a work vehicle according to an embodiment of the present invention.

A work vehicle according to an embodiment of the present invention will be described with reference to the drawings.
The engine E is mounted on the front part of the vehicle body 1, the rotational power of the engine E is transmitted to the transmission in the transmission case 2, and the rotational power decelerated by the transmission is transmitted to the front wheels 3 and the rear wheels 4. . A tank 5 for storing a chemical solution is installed at the rear of the machine body. A driver's seat 6 is provided above the chemical solution tank 5, and a steering handle 7 is provided in front of the tank. The chemical solution in the chemical solution tank 5 is ejected from the nozzle 11 of the spray hose 10 provided in the spray boom 9 by the pump 8.
Boom storage support frames 13 and 13 for storing and supporting the spreading boom 9 are erected on the left and right sides of the vehicle body 1, and are latched and held by the receiving portion 14.

Next, the configuration of the spreading boom 9 will be described.
The center spray boom (center boom) 9a substantially matches the width of the machine body, and the left and right spray booms (side booms) 9b, 9b connected to the left and right sides of the center boom are longer than the center boom 9a. The side boom 9b is rotatably connected to the center boom 9a, and is rotated upward by the side boom upper and lower cylinders 15 supported by the cylinder mounting column 26 attached to the vehicle body 1 so as to be held in the stored state. Or can be rotated and supported in a spraying work posture so as to be substantially parallel to the ground. When the spreading boom 9 is stored, the side boom 9b is at the correct storage posture angle and then stored by the lowering of the boom entire lifting cylinder 17.

The entire boom raising / lowering link 30 (FIG. 1) is capable of raising and lowering the entire boom around the pivot fulcrum of the whole boom raising / lowering link 30 by the boom whole raising / lowering cylinder 17, and the raising / lowering position of the entire boom can be detected by a potentiometer 31. In addition, the positions of the booms 9a and 9b indicated by the two-dot chain line in FIG. 1 are positions where the entire boom is raised. Further, the side boom 9b can be moved up and down by the side boom up and down cylinder 15, but the up and down movement position can be detected by the potentiometer 32.
And as shown in FIG. 4, it can also spray by the spray amount only from the nozzle 11 of the center boom 9a of the center of the spraying boom 9 according to the conditions of a farm field, etc.

  In addition, the working vehicle of the embodiment shown in FIG. 5 is a working vehicle equipped with a chemical solution spraying (control) device having a vehicle speed interlocking function (microcomputer control), for example, when planting crops such as legumes, Of the nozzles 11 provided on the booms 9a and 9b, spraying from above the crop by the normal upper nozzle 11 and spraying from the lower side by the hanging nozzle 11 are often performed at the same time. (Spreading mode) is called the vertical spraying method. On the other hand, the spraying method shown in FIG. 4 is only spraying from above, and is called the standard spraying method.

  In the case shown in FIG. 5, the form of the nozzle 11 is different, but the flow rate (spreading amount per unit time) sprayed from all the jets is a parameter for the automatic control calculation formula in the spraying control device (not shown). It is possible to perform automatic spraying by using it in the formula. Therefore, even with the control by the suspension method (upper and lower spraying method), uniform spraying and quantitative spraying by the vehicle speed interlocking function (microcomputer control) can be performed.

  The opening / closing mechanism of the side boom 9b will be described mainly as shown in the enlarged plan view of the front portion of the vehicle body 1 shown in FIG. 6. At the both ends of the support frame 21 attached in the lateral width direction at the center of the front portion of the vehicle body 1. The mounting arm 23 to which the tip of the opening / closing cylinder 20 is connected is rotatably mounted around the opening / closing fulcrum 21 a of the support frame 21. The other end of the mounting arm 23 and the side surface of the side boom 9 b are connected via a tension spring 24. The opening / closing cylinder 20 presses the mounting arm 23 in the direction of arrow A against the urging force of the tension spring 24, and simultaneously rotates the tension spring 24 while rotating the side boom 9b from the boom storage position to the side by approximately 90 degrees. By pulling, the side boom 9b can be extended to the horizontal and horizontal extended posture position as shown by a two-dot chain line in FIG. 6 (this will be referred to as outward rotation). Although not shown, a gap-adjustable stopper bolt is provided between the base of the side boom 9b and the other end of the mounting arm 23. Even if the front surface is pulled by the tension spring 24, the horizontal and horizontal tension of the side boom 9b is not shown. The exit posture can be adjusted.

Further, when the side boom 9b is moved from the boom storage position to the opposite side of the arrow A from the boom storage position, the mounting arm 23 arbitrarily moves the side boom 9b to the inside of the boom storage position against the urging force of the tension spring 24. Can be rotated at a predetermined angle (referred to as “inward rotation”).
The open / close cylinder 20 is expanded and contracted by an electrically operated geared motor 27.
The side boom 9b is configured not to move more than a predetermined angle due to the outer rotation and the inner rotation by a stopper (not shown), and in the horizontal and horizontal protruding position, the side boom 9b is an obstacle on the ground. In the unlikely event of a hit, the tension spring 24 balances the center boom 9a so that the center boom 9a is bent backward to prevent damage.

  In this way, the side boom 9b is rotated outwardly from the storage position to the horizontal and horizontal protruding posture, inwardly rotated inward from the storage position, and switched to the storage posture along the lateral side portion of the vehicle body 1. it can.

  As shown in FIG. 7, conventionally, the structure is generally configured to rotate outwardly within a range of 90 degrees from the storage position of the side boom 9 b parallel to the side surface of the vehicle body 1. The minimum turning radius R (illustrated) of the tip of the boom 9b is increased, and the side boom 9b may be brought into contact with the wall of the barn or the like to be damaged.

  On the other hand, the configuration of the side boom 9b of the present embodiment is as follows: The greatest advantage is that the side boom 9b can be turned inward to an arbitrary angle range, so that the minimum rotation of the tip end portion of the side boom 9b is achieved. The moving radius R1 is smaller than the conventional minimum turning radius R, and it is possible to make a small turn. Thus, the work adaptability of the work vehicle to / from the narrow barn and the narrow crank road is greatly improved.

  Further, in the pivoting configuration of the side boom 9b, if the same configuration is adopted for the left and right side booms 9b, 9b, not only the storage location is selected when the work vehicle is stored in a barn or the like, but either forward or reverse. However, it was possible to enter and exit a narrow barn and move in very narrow passages without selecting the direction of travel.

  In addition, since the maximum internal rotation angle is set to a position where the left and right side booms 9b, 9b do not interfere with each other, damage to the left and right side booms 9b, 9b is prevented and the minimum of the work vehicle is further reduced. The radius can be reduced and a small turn is possible. In addition, by making the maximum inward turning angle of the side boom 9b substantially coincide with the minimum stroke end of the turning cylinder 20, the inward turning of the side boom 9b is ensured without causing the right and left side booms 9b to interfere with each other. The operation can be performed.

  As a modification of the internal rotation mechanism of the side boom 9b, the rotation angle is such that the side boom 9b that rotates inward to the upper position of the driver's seat 6 does not come regardless of the position of the driver's seat 6 in the vehicle body 1 Then, the safety space of the driver's seat 6 can be secured, and the sprayed chemical solution using the side boom 9b does not drip directly on the operator, so that there is an advantage that no chemical damage occurs.

  In the configuration in which the side boom 9b is pivoted inwardly toward the center line in the front-rear direction of the vehicle body 1 of the work vehicle, the support frames 13 that are erected on both sides on the rear side of the vehicle body 1 to store the side boom 9b. A boom receiver 14 at the top is provided. When the boom receiving portion 14 has the side boom 9b, the side boom 9b is not rotated inward. This is to prevent damage to the boom receiving portion 14 and the side boom 9b.

Also, potentiometers 31 and 32 are provided at the pivoting fulcrum part of the boom entire raising / lowering link 30 (FIG. 1) and the vertical pivoting fulcrum part of the side boom 9b, respectively, and the vertical positions of the boom entire raising / lowering link 30 and the side boom 9b are more than predetermined. The side boom 9b can be turned inward only when the angle is at the angle.
In this way, the problem that the side boom 9b damages the upper surface of the chemical tank 5 in the side view of the vehicle body 1 does not occur.

  Further, when the side boom 9b is raised by the boom lifting / lowering cylinder 17 from the boom storage position and is at the maximum lift position, the handle 7 is turned off, and the side boom 9b is automatically installed when the steering angle of the front wheels 3 exceeds a predetermined angle. The rotating cylinder 20 is operated so as to rotate.

  Thus, when traveling through a narrow barn or a passage with a crank, the load of the steering operation of the vehicle body 1 can be reduced as compared with the prior art. In order to detect the steering angle of the front wheel 3, the movement of the steering rod on a final case (not shown) that transmits power to the front wheel 3 is detected by a potentiometer (not shown).

  Further, in the internal pivoting configuration of the side boom 9b linked to the steering angle of the handle 7, the steering angle at the time of front wheel steering and 4WS steering (which can be set by the operator and varies greatly depending on the use conditions, so it is stored in the CPU storage device. However, the side boom 9b may automatically rotate inward when it is equal to or greater than a predetermined value. This is because the side boom 9b is configured to be able to rotate inward in accordance with various steering modes, thereby further facilitating the steering operation.

Further, as can be seen from FIG. 7, only the side boom 9b located outside the turning direction of the work vehicle can be turned inward. In this case, there is an advantage in that it is possible to quickly move on the road because only one side boom 9b has to be stored in a predetermined position in the road running after taking the work vehicle from the barn.
Note that the side of the work vehicle located outside the turning direction can be detected by a turning sensor (not shown) provided on the turning shaft of the handle 7.

  As shown in FIG. 8, in the stowed posture of the side boom 9b in the receiving portion 14, the width (L2) to the tip of the side boom 9b with respect to the center line in the front-rear direction of the vehicle body 1 is set to the base of the side boom 9b. When the side boom 9b is housed in the arrangement (L1> L2) closer to the center line of the vehicle body 1 in the front-rear direction of the work vehicle than the width (L1), the side boom 9b every time when entering or leaving a narrow barn or traveling on a narrow crankway Therefore, the load of the steering operation of the side boom 9b can be reduced compared to the conventional case, and the rational side boom 9b can be accommodated. That is, there is an advantage that the small turn performance of the vehicle body 1 is improved as compared with the related art in a state in which the side boom 9b is stored in the receiving portion 14.

  Further, as shown in the plan view of FIG. 7, the side boom 9b is accommodated in a position where the side boom 9b does not overlap the chemical tank 5 in a plan view of the vehicle body 1, so that the side boom 9b is accommodated after the chemical spraying operation. Occasionally, a part of the chemical liquid drops from the inside of the spray hose 10 onto the chemical liquid tank 5 through the spray nozzle 11, thereby preventing a problem that the chemical liquid tank 5 is discolored.

DESCRIPTION OF SYMBOLS 1 Car body 2 Mission case 3 Front wheel 4 Rear wheel 5 Chemical tank 6 Driver's seat 7 Steering handle 8 Pump 9 Spreading boom 9a Center boom 9b Side boom 10 Spraying hose 11 Nozzle 13 Boom storage support frame 14 Receiving 15 Side boom upper and lower cylinder 17 Whole boom Lifting cylinder
21 Support frame 23 Mounting arm 24 Tension spring 26 Cylinder mounting column 27 Geared motor 30 Whole boom lifting link 31, 32 Potentiometer

Claims (3)

  In a chemical spraying work vehicle for supplying chemicals to a chemical spraying boom (9) for spraying chemicals installed on the vehicle body (1) from a chemical tank (5) storing chemicals installed on the vehicle body (1). The spreading boom (9) is composed of a center boom (9a) fixedly arranged in front of the work vehicle and left and right side booms (9b, 9b) whose ends are connected to both sides of the center boom (9a) so as to be openable and closable. The left and right side booms (9b, 9b) are rotated approximately 90 degrees outward from the position of the vehicle body (1) from the position where the left and right side booms (9b, 9b) are housed on both sides of the vehicle body (1). The at least one side boom (9b or 9b) is further arranged from the position stored along the longitudinal direction of the vehicle body (1) to the state of being arranged along the direction. Center line direction in the front-rear direction Chemical spraying work vehicle, characterized by being configured to be rotated by a predetermined angle.   In a state in which the side booms (9b, 9b) are rotated by a predetermined angle in the longitudinal direction of the vehicle body (1) from the position where the side booms (9b) are housed along the longitudinal direction on both sides of the vehicle body (1), The chemical solution spraying work vehicle according to claim 1, further comprising a configuration in which the tip ends of the booms (9b, 9b) are rotated to a position where they do not interfere with each other.   A driver's seat (6) is provided on the vehicle body (1), and the side booms (9b, 9b) are arranged in the longitudinal direction of the vehicle body (1) from positions where the side booms (9b, 9b) are housed along the longitudinal direction on both sides of the vehicle body (1). 2. A configuration in which both side booms (9b, 9b) are pivotally arranged so as to avoid the position above the driver's seat (6) in a state of rotating by a predetermined angle in the direction of the center line. Chemical sprayer working vehicle.

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