JP5870006B2 - Boom sprayer - Google Patents

Description

  The present invention relates to a boom sprayer.

  2. Description of the Related Art Conventionally, there is known a boom sprayer in which a vehicle is provided with a center boom for spraying a chemical solution and a pair of side booms (hereinafter, these may be collectively referred to as “boom”). When the boom sprayer travels while spraying a medicine on a field having a horizontal farmland, it is desirable to keep the boom parallel to the farmland or the crop so that the boom does not contact the farmland or the crop.

  In Patent Document 1, in a farm field having a horizontal farmland, the boom is pendulum with respect to the vehicle so that the boom can be kept parallel to the farmland or the crop even when the vehicle is tilted to the left or right due to the unevenness of the road surface. A horizontal control mechanism that can swing in a shape is disclosed.

JP 2008-200005 A

  In a boom sprayer, there are situations where it is required to stop horizontal control by a pendulum when the postures of the pair of side booms are not symmetrical, when the boom sprayer turns, or when working on an inclined farm field. In this case, it is conceivable that an operator inserts a pin between the center boom and the vehicle side to stop the movement of the center boom and stop the horizontal control, but the alignment of the pin holes and the pin insertion work are troublesome and complicated. there were.

  Therefore, an object of the present invention is to provide a boom sprayer that can easily stop the horizontal control of the center boom.

The boom sprayer (1) of the present invention includes a vehicle (2), a center boom (3) supported so as to be swingable in a left-right direction with respect to the vehicle (2), and both ends of the center boom (3). A boom sprayer (1) including a pair of side booms (4, 4) coupled to the center boom (3) or the vehicle (2), wherein the center boom (3) A pair of lock mechanisms (50, 50) for locking the vehicle (2) so as not to swing is provided. The pair of lock mechanisms (50, 50) includes a center boom (3) and a lock mechanism (50, 50). 50), the center boom (3) has a movable part (52, 52) that can be moved back and forth in the longitudinal direction, and the vehicle (2) has a lock mechanism (50, 50). If the vehicle (2) can move back and forth in the left-right direction Each of the movable parts (52, 52) has a longitudinal direction of the center boom (3) when the center boom (3) has a lock mechanism (50, 50). Nde to different orientations proceeds to lock the center boom (3) so as not to swing by abutting the vehicle (2), the vehicle when the vehicle (2) has a locking mechanism (50, 50) (2 ) To the center boom (3 ) by moving in different directions in the left and right directions and locking the center boom (3) so as not to swing.

According to this boom sprayer (1), when the center boom (3) has the lock mechanism (50, 50), the movable part (52) of the pair of left and right lock mechanisms (50, 50) is the center boom ( Nde respectively proceeds in different directions in the longitudinal direction of the three) locking center boom (3) so as not to swing by abutting the vehicle (2), the vehicle (2) has a locking mechanism (50, 50) because if it is to lock the by Lise centers boom (3) so as not to swing to abut on the center boom (3) proceed respectively in different directions in the lateral direction of the vehicle (2), center boom (3 ) Level control can be easily stopped.

Here, the movable part (52) has a rod (53) that moves forward and backward, and a locking mechanism (50, 50) for the center boom (3) or the vehicle (2) that is provided at the tip of the rod (53). and has a contact with abutment surface (54A) towards no, the vehicle (2) rotatably supported head member to the tip of the rod via a pin (56) which is passed in the longitudinal direction (53) (54). When the center boom (3) is locked when the center boom (3) is not perpendicular to the vertical direction of the vehicle (2) and the horizontal control is stopped, the load that the center boom (3) tries to swing is transferred to the movable part (52). Is received obliquely from the side that does not have the lock mechanism (50, 50) of the center boom (3) or the vehicle (2). Here, since the head member (54) having the contact surface (54A) is rotatably supported on the tip of the rod (53) via the pin (56), the head member (54) is the pin. (56) can be rotated around the fulcrum to receive the load on the entire contact surface (54A).

Further, the one having the lock mechanism (50, 50) of the center boom (3) or the vehicle (2) extends in the advancing / retreating direction of the movable part (52) to guide the movement of the head member (54). It is preferable that the long hole (34C) and the pin (56) are loosely arranged in the long hole (34C). In this case, the long hole (34C) serves as a guide for the movement of the head member (54), and a member that forms the long hole (34C) via the pin (56) for the bending load received by the movable part (52). (34B).

  The head member (54) has a hole (54C) into which the tip of the rod (53) enters, and is elastic between the tip surface of the rod (53) and the inner wall of the hole (54C) facing the hole (54C). It is preferable to have a member (57). When the center boom (3) is locked and the horizontal control is stopped when the center boom (3) is not perpendicular to the vertical direction of the vehicle (2), the center boom (3) is perpendicular to the vertical direction of the vehicle (2). Compared to the case, the distance (A2) between the head members (54) of the movable part (52) becomes longer. Here, the head member (54) has a hole (54C) into which the tip of the rod (52) enters, and between the tip surface of the rod (52) and the inner wall of the hole (54C) facing this. Since the elastic member (57) is provided, the distance difference can be absorbed by the elasticity of the elastic member (57), and the displacement of the distance between the head members (54) can be dealt with.

  ADVANTAGE OF THE INVENTION According to this invention, the boom sprayer which can stop the horizontal control of a center boom easily can be provided.

It is a side view of the boom sprayer of this embodiment. FIG. 2 is a rear perspective view of FIG. 1. It is the rear view seen from the vehicle back of a raising / lowering frame and a center boom. FIG. 4 is a rear view of FIG. 3. FIG. 4 is a perspective view of FIG. 3. FIG. 4 is a partially enlarged view of FIG. 3. It is the elements on larger scale of FIG. It is operation | movement explanatory drawing of a lock cylinder. It is a disassembled perspective view of a lock cylinder. It is a partial cross section figure of the movable part of a lock cylinder. It is a partial cross section for demonstrating operation | movement of the movable part of a lock cylinder. It is a rear view which shows the state locked when the center boom is perpendicular | vertical with respect to the up-down direction of a vehicle. It is a rear view which shows the state locked when the center boom is not perpendicular | vertical with respect to the up-down direction of a vehicle.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and redundant description is omitted.

  In the present specification, the “vehicle” refers to a self-propelled or non-self-propelled vehicle. The following embodiment shows an example of a towed vehicle that is non-self-propelled. Further, in this specification, the expressions “up and down”, “left and right”, and “front and back” are based on the traveling direction of the vehicle.

  As shown in FIG. 1 and FIG. 2, the boom sprayer 1 is for spraying chemicals on farmland or crops in a field, and includes a vehicle 2, a center boom 3 attached to the rear part of the vehicle 2, and a center boom 3. And a pair of side booms 4 connected to both ends of the. The side boom 4 is folded when the chemical solution is not sprayed, and is stored in a state where it is lifted obliquely forward to a side position with respect to the vehicle 2 as shown in FIGS. 1 and 2. When spraying the chemical solution, the side boom 4 is expanded so as to be in a straight line with respect to the center boom 3.

  The vehicle 2 has a machine body frame 5 that is long in the front-rear direction, a wheel 6 is provided on the lower side, and a chemical tank 7 is provided on the upper side and the rear side. A pump 8 for transporting the chemical solution in the chemical solution tank 7 to the booms 3, 4, 4 is provided on the upper side and the front side of the machine body frame 5. A universal shaft 9 is provided for connection to the input shaft on the two sides. Rails 10 are fixed to the rear portion of the vehicle 2 so as to extend in the vertical direction, and an elevating frame 11 is attached to the elevating frame 11 via an elevating roller 14 included in the elevating frame 11. . On the rear side of the elevating frame 11, the center boom 3 is supported by the elevating frame 11 by a pair of left and right link rods 16A and 16B so as to be swingable, thereby constituting a biaxially suspended horizontal control mechanism.

  As shown in FIGS. 3 to 6, the elevating frame 11 has a frame body 12 that is assembled in a rectangular shape in the front-rear direction, with the left-right direction being the longitudinal direction. The frame 12 includes an upper side member 12A and a lower side member 12C that face each other, and a pair of left and right side members 12B and 12B. The elevating frame 11 has an elevating cylinder 13 that extends in the vertical direction and has one end fixed to the rail 10 and the other end fixed to the center boom 3. The elevating cylinder 13 allows the frame 12 and the booms 3 and 4 to be fixed. , 4 can be moved up and down. In addition, the lifting frame 11 has rotatable lifting rollers 14 and 14 on the upper and lower sides of the pair of left and right side members 12B and 12B constituting the frame body 12, respectively. Each is fitted to the rail 10 to allow the lifting frame 11 to move up and down (see FIG. 2).

  The elevating frame 11 has a pair of link rod support protrusions 15 and 15 that extend upward from positions on both the left and right sides of the upper side member 12A, and the upper ends of the link rod support protrusions 15 and 15 respectively. Is configured such that one ends of a pair of left and right link rods 16A and 16B for supporting the center boom 3 on the lifting frame 11 on the vehicle 2 side are rotatably connected. Further, the elevating frame 11 sandwiches a horizontal member 39 (described later) fixed to the center boom 3 from the front and rear at the center of the upper side member 12A to restrict the back and forth movement of the center boom 3 and to move the center boom 3 up and down. A sliding member 17 that is slidable in the left-right direction is provided.

  Further, the elevating frame 11 has a pair of vertically extending vertical members 18 and 18 fixed to the left and right sides of the lower side member 12C on the rear side surface of the lower side member 12C (FIG. 4). Each of the vertical members 18 and 18 has a pair of U-shaped plate members 19 and 19 extending from the upper end and the lower end of the vertical members 18 and projecting toward the vehicle rear side. At the rear ends of the pair of plate members 19, 19, round bar-shaped rollers 20, 20 extending in the vertical direction are provided. The rollers 20, 20 have a pair of plate members 19, 19 by their upper and lower ends. The rear ends are connected to each other. In other words, the vertical member 18, the pair of plate members 19 and 19, and the roller 20 form a rectangular ring when the lifting frame 11 is viewed in the left-right direction.

  The center boom 3 includes an upper side member 31 and a lower side member 32 having a rectangular cross section whose longitudinal direction is the left-right direction, and a pair of vertical members 33 that extend in the vertical direction in the vicinity of the center of the upper side member 31 and the lower side member 32. , 33 are connected to each other. Here, the upper side member 31 is positioned above a rectangular ring formed by the vertical member 18, the pair of plate members 19, 19 and the roller 20 in the above-described lifting frame 11, and the lower side member 32 is formed of the rectangular ring. The inner surface is passed through and the rear side surface faces the roller 20 via a first plate member 34A described later. Below the lower side member 32, a nozzle pipe 36 provided with a plurality of nozzles 35 for spraying a chemical solution and extending along the longitudinal direction of the center boom 3 is supported by a nozzle pipe support member 37. Moreover, the side boom 4 is connected with the both ends of the right and left of the center boom 3 so that rotation is possible respectively. 3-5, the side boom 4 shows only the connection part with the center boom 3. FIG.

  As shown in FIG. 6, a pair of left and right brackets 38 are provided on the upper surface of the lower side member 32. The other ends of the pair of left and right link rods 16A and 16B connected to the lifting frame 11 are rotatably connected to the pair of brackets 38 and 38, respectively. As a result, the center boom 3 is supported so as to be swingable in a pendulum shape in the left-right direction with respect to the lifting frame 11 via a pair of left and right link rods 16A and 16B, thereby constituting a biaxially suspended horizontal control mechanism. doing. Note that one of the link rods 16A and 16B (here, the left link rod 16A) is an extendable tilt cylinder 16A.

  At the upper center of the upper side member 31 of the center boom 3, a horizontal member 39 that is horizontally spaced apart from the upper side member 31 is fixed to the center boom 3 via a connecting member 39A. As described above, the horizontal member 39 is sandwiched from the front and rear by the sliding member 17 provided on the elevating frame 11 and is slidable in the vertical and horizontal directions. As shown in FIGS. 7 and 8, a rectangular ring formed by the vertical member 18, the pair of plate members 19 and 19, and the roller 20 in the above-described lifting frame 11 among the lower side members 32 of the center boom 3. A first plate member 34A is fixed along the longitudinal direction of the lower side member 32 and inside the rectangular ring on the rear side surface of the lower side member 32 at a position passed through the rear side of the first plate member 34A. A second plate member 34B that faces the first plate member 34A with the roller 20 interposed therebetween is provided at a position spaced apart from each other. One end of the second plate member 34B on the center side of the center boom 3 is connected to the lower end of the vertical member 33, and the other end of the second plate member 34B is provided on the rear side surface of the lower side member 32 of the center boom 3. Connected to the bracket 40. That is, mainly on the vehicle 2 side, the center boom 3 is slidable in the vertical and horizontal directions with its longitudinal movement restricted.

  The sliding member 17 and the horizontal member 39, and the roller 20 and the first and second plate members 34A and 34B are slidable with respect to each other. A gap is provided to allow the swing.

  Further, as shown in FIG. 6, below the bracket 40, a bracket 41 provided on the lower surface of the lower side member 32 of the center boom 3 and extending rearward is positioned. A coil spring 42 is extrapolated to the bracket 41. The pin 43 is passed in the left-right direction, and the end of the pin 43 closer to the center of the center boom 3 is in contact with the roller 20 so as to define the limit point of swinging of the center boom 3. A stopper 44 is provided.

  A pair of left and right lock cylinders (lock mechanisms) 50, 50 are provided on the rear surface of the lower side member 32 of the center boom 3. The lock cylinder 50 is, for example, a hydraulic cylinder, and as shown in FIGS. 7 and 8, the main body (cylinder) 51 is positioned on the side of the vehicle and the head member 54 is positioned near the center in the left-right direction. Is attached.

  As shown in FIG. 9, the lock cylinder 50 has a substantially cylindrical shape, one end is opened, the other end is closed, and a cylindrical space is formed in the interior. And a movable portion 52 that can be moved forward and backward. The movable portion 52 has a rod 53 whose one end enters the inside of the main body portion 51 and the other end protrudes to the outside of the main body portion 51, and an abutting contact with the roller 20 provided at the other end (tip) of the rod 53. And a head member 54 having a surface 54A. A pin hole 55 penetrating in the front-rear direction is formed at the other end of the rod 53, and the head member 54 has a bottomed hole 54C into which the other end of the rod 53 enters (see FIGS. 10 and 11). The pin 56 is passed through the hole 54 </ b> B provided in the head member 54 in the front-rear direction and the pin hole 55 of the rod 53, so that the head member 54 is supported on the other end of the rod 53. Here, the diameter of the hole 54 </ b> C provided in the head member 54 is slightly larger than the diameter of the other end of the rod 53 (FIG. 10). On the other hand, the pin 56 is supported so as to be rotatable. Further, an annular groove 56A is formed at the end of the pin 56 passed through the head member 54, and the groove 56A has a hole edge portion of the second plate member 34B that forms a long hole 34C. The pin 56 is loosely disposed in the long hole 34C by entering (FIG. 7).

  Further, as shown in FIGS. 9 and 10, an elastic member 57 such as packing is provided between the other end surface of the rod 53 and the inner wall of the hole 54C of the head member 54 opposed to the other end surface. .

  According to the boom sprayer 1 of the present embodiment configured as described above, when the movable portion 52 of the lock cylinder 50 is not moving toward the roller 20 (the state of FIG. 7), the center boom 3 has the stopper 44. Oscillates in a pendulum shape in the left-right direction with the position of. Thereby, even if the vehicle 2 is tilted to the left or right due to the unevenness of the road surface, the chemical solution is sprayed while keeping the side boom 4 parallel to the farmland or the crop so that the side boom 4 does not contact the farmland or the crop. It can be carried out.

  Here, there are scenes in which the horizontal control by the pendulum is required to be stopped, for example, when the postures of the pair of side booms 4 and 4 are not symmetrical, when the boom sprayer 1 turns, or when working on an inclined farm field. At this time, the movable portion 52 of the lock cylinder 50 is moved toward the center side of the center boom 3 and brought into contact with the roller 20 on the vehicle 2 side (state shown in FIG. 8), so that the pair of rollers 20, 20 Can be sandwiched from both the left and right sides, and the pendulum can be locked to prevent the center boom 3 from swinging, and the center boom 3 can be locked so as not to swing.

  Here, when the movable portion 52 of the lock cylinder 50 moves and contacts the roller 20, the elongated hole 34 </ b> C formed in the second plate member 34 </ b> B serves as a guide for the movement of the head member 54 via the pin 56. . As a result, the head member 54 can accurately move toward the roller 20, and when the movable portion 52 receives a bending load, the bending force is received by the second plate member 34 </ b> B via the pin 56. Therefore, deformation and breakage of the movable part 52 can be prevented.

  In addition, when the vehicle 2 is tilted to the left or right, or when the tilting cylinder 16A is expanded and contracted in a tilted field to forcibly maintain the tilt of the center boom 3 at a predetermined angle, the center boom 3 is The state is not perpendicular to the vertical direction. In this case, when the center boom 3 is locked and the horizontal control is stopped, the movable part 52 receives the load that the center boom 3 is about to swing from the roller 20 obliquely. Here, in the boom sprayer 1 of the present embodiment, the head member 54 having the contact surface 54A is rotatably supported on the other end of the rod 53 via the pin 56 (provided on the head member 54). 11), the head member 54 has the pin 56 as a fulcrum as shown in FIG. It can rotate and receive the said load from the roller 20 in the whole contact surface 54A.

  Further, when the horizontal control is stopped when the tilt cylinder 16A is expanded and contracted as described above, the center boom 3 is perpendicular to the vertical direction of the vehicle 2 as shown in FIGS. Compared with the distance (A1 in FIG. 12) between the head members 54 of the movable part 52 in the case, the head members 54 of the movable part 52 when the center boom 3 is not perpendicular to the vertical direction of the vehicle 2 The distance between (A2 in FIG. 13) becomes longer. In the boom sprayer 1 according to the present embodiment, the elastic member 57 is provided between the other end surface of the rod 53 and the inner wall of the hole 54C of the head member 54 facing the rod 53. The difference can be absorbed and the displacement of the distance between the head members 54 can be dealt with.

  Thus, according to the boom sprayer 1 of the present embodiment, the horizontal control of the center boom 3 is performed regardless of the posture of the vehicle 2, the balance of the posture of the side boom 4, the expansion / contraction state of the tilt cylinder 16A, the presence / absence of traveling, and the like. It can be easily stopped.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. For example, in the above-described embodiment, the left and right directions in which the lock cylinder 50 is provided are the directions in which the movable portion 52 of the lock cylinder 50 is moved toward the center side of the center boom 3 and brought into contact with the roller 20. The opposite direction may be used. That is, in the above-described embodiment, when the center boom 3 is locked so as not to swing, the pair of rollers 20 and 20 is sandwiched from both the left and right sides, but these are stretched from the inside of the pair of rollers 20 and 20. Alternatively, the movable portion 52 of the lock cylinder 50 may be brought into contact.

  In the above embodiment, the two-axis suspension type horizontal control mechanism that swings the center boom 3 in a pendulum manner by the two link rods 16A and 16B is taken as an example. Can also be applied.

  Moreover, although the rail 10 and the raising / lowering frame 11 were made into a part of the vehicle 2 and the center boom 3 was supported by this in the said embodiment, when the center boom 3 did not need to be raised / lowered, the rail 10 and It is good also as an aspect which does not provide the raising / lowering frame 11. FIG. Moreover, although the lock cylinder 50 was provided in the center boom 3 and the movable part 52 contact | abutted the roller 20 which is the vehicle 2 side was demonstrated in the said embodiment, the lock cylinder 50 was provided in the vehicle 2, The movable portion 52 may be in contact with the center boom 3 side.

  Moreover, although the example of the tow type vehicle was shown in the said embodiment, the vehicle may be a mount type vehicle and may be a self-propelled vehicle.

  DESCRIPTION OF SYMBOLS 1 ... Boom sprayer, 2 ... Vehicle, 3 ... Center boom, 4 ... Side boom, 34C ... Long hole, 50 ... Lock cylinder (lock mechanism), 52 ... Movable part, 53 ... Rod, 54 ... Head member, 54A ... Contact surface, 54C ... hole, 56 ... pin, 57 ... elastic member.

Claims (4)

A vehicle (2), a center boom (3) supported so as to be swingable in a left-right direction with respect to the vehicle (2), and a pair of side booms connected to both ends of the center boom (3) (4, 4), a boom sprayer (1) comprising:
One of the center boom (3) and the vehicle (2) is a pair of lock mechanisms (50, 50) for locking the center boom (3) to the vehicle (2) so as not to swing. Have
When the center boom (3) has the lock mechanism (50, 50), the pair of lock mechanisms (50, 50) has a movable part (movable part) that can advance and retreat in the longitudinal direction of the center boom (3). 52, 52), and when the vehicle (2) has the lock mechanism (50, 50), a movable part (52, 52) that can be moved back and forth in the left-right direction of the vehicle (2). Each has
Each movable part (52)
Said by when the center boom (3) has the lock mechanism (50, 50) is abutting on the vehicle (2) respectively proceeds Nde in different directions in the longitudinal direction of the center boom (3) When the center boom (3) is locked so as not to swing, and the vehicle (2) has the lock mechanism (50, 50), the vehicle (2) advances in different directions in the left-right direction. locking the disabling oscillating the center boom (3) by abutting on the center boom (3), a boom sprayer (1). The movable part (52) includes a rod (53) that advances and retreats,
Provided at the tip of the rod (53) is a contact surface (54A) that contacts the center boom (3) or the vehicle (2) that does not have the lock mechanism (50, 50). And a head member (54) rotatably supported at the tip of the rod (53) via a pin (56) passed in the front-rear direction of the vehicle (2). Boom sprayer (1). The one having the lock mechanism (50, 50) of the center boom (3) or the vehicle (2) extends in the advancing / retreating direction of the movable part (52) and moves the head member (54). Has a long hole (34C) for guiding,
The boom sprayer (1) according to claim 2, wherein the pin (56) is loosely arranged in the elongated hole (34C). The head member (54) has a hole (54C) into which the tip of the rod (53) enters,
The boom sprayer (1) according to claim 2 or 3, further comprising an elastic member (57) between a front end surface of the rod (53) and an inner wall of the hole (54C) facing the rod.