JP5941759B2 - Boom spreader - Google Patents

Description

  The present invention relates to a boom spraying apparatus.

  A boom spraying device such as a boom sprayer is disposed behind the traveling machine body (tractor) in the direct mounting type of the tractor, and is disposed in front of or behind the traveling machine body in the self-propelled type. The boom spraying device includes a boom extending toward a side intersecting the traveling direction of the traveling machine body, and can perform a wide area spraying operation corresponding to the boom length in a traveling process in a farm field.

  In general, the boom spreading device includes a mechanism that folds the boom to a predetermined storage position when not working. As the folding mechanism, various forms are known, but as a relatively simple mechanism, a boom extending toward the side intersecting the traveling direction of the traveling machine body is arranged along the traveling direction of the traveling machine body. The one that is folded by approximately 90 ° so as to face is known (see Patent Document 1 below).

JP-A-9-191729

  When the boom is folded in the direction along the traveling direction of the traveling aircraft, the boom spreader deployed behind the traveling aircraft is oriented forward and obliquely upward in consideration of interference with the traveling aircraft and ease of getting on and off the traveling aircraft. It is necessary to fold the boom. For this purpose, it is necessary to incline the hinge shaft for folding the boom so that the hinge shaft tilts slightly backward from the vertical. However, when the hinge shaft is tilted in this way, when a release mechanism that rotates the boom around the hinge shaft is provided, when the boom comes into contact with an obstacle and the release mechanism works, the front end side of the boom is This causes problems such as damage to the crops and damage to the boom itself due to contact with the field scene. In order to avoid this, a hinge shaft is provided as a release mechanism in addition to folding, and there is a problem that the structure becomes complicated.

  On the other hand, even when the boom is in a folded state, the length of the boom is considerably longer than that of the main body of the boom spreading device, and when the boom spreading device is stored in a warehouse or the like, the protruding portion of the boom is accommodated. Large storage space is required. For this, it is conceivable to remove the boom from the main body of the boom spraying device and store it, but a tool for removing the boom is required, and there is a problem that a lot of labor is required for complicated removal work.

  This invention makes it an example of a subject to cope with such a problem. That is, in the boom spraying device deployed behind the traveling machine body, with a relatively simple structure, the boom is folded forward and obliquely upward of the traveling machine body, and the tip of the boom approaches the field scene even when released against an obstacle. The object of the present invention is that the boom can be removed by a simple operation without using a tool, and the storage space for the boom spraying device can be reduced by removing the boom. is there.

  In order to achieve such an object, a boom spraying apparatus according to the present invention comprises at least the following configuration.

  An aircraft deployed behind the traveling aircraft, a folding position pivotally supported by the aircraft and intersecting the traveling direction of the traveling aircraft, and a distal end side along the traveling direction of the traveling aircraft obliquely upward. And a boom opening / closing member that is detachably connected to the boom opening / closing member and includes a plurality of spray holes along the longitudinal direction, the boom opening / closing member being a connected portion of the boom A connecting portion for connecting the boom, the connected portion of the boom includes a pivot shaft that swings the boom up and down with respect to the boom opening and closing member at the folding position, and at the deployed position of the boom opening and closing member. The boom spraying device is characterized in that the boom is swingable rearward and obliquely upward around the pivot shaft.

  The boom spraying device having such a feature can fold the boom connected to the boom opening / closing member toward the front obliquely upward of the traveling machine body, and when releasing the boom at the deployment position of the boom, The tip of the boom can be released obliquely upward by the pivotal support of the connected portion with respect to the boom. As a result, it is possible to prevent the tip of the boom from approaching the farm scene at the time of release. Moreover, since the boom is detachably connected to the boom opening / closing member, the boom spreading device can be accommodated without requiring a large space by removing the long boom from the boom opening / closing member when not in use.

  At this time, the connected portion pivotally supported by the boom serves both as a boom mounting / removal structure and a boom release structure, so that the boom can be easily mounted / removed and a good boom release function can be realized. be able to.

It is explanatory drawing which showed the whole structure of the boom spraying apparatus which concerns on embodiment of this invention. It is explanatory drawing which showed the specific example of the boom spraying apparatus which concerns on embodiment of this invention. It is explanatory drawing which showed the specific example of the boom spraying apparatus which concerns on embodiment of this invention. It is explanatory drawing which showed the function of the boom spraying apparatus which concerns on embodiment of this invention. It is explanatory drawing which showed the function of the boom spraying apparatus which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Drawing 1 is an explanatory view showing the whole boom spraying device structure concerning an embodiment of the present invention. In the drawing, the boom spreading device 1 in a state of being directly mounted on a traveling machine body (for example, a tractor) T is shown. The boom spreading device 1 includes a machine body 10 disposed behind the traveling machine body T, a boom opening / closing member 11 pivotally supported by the machine body 10, and a boom 12 detachably connected to the boom opening / closing member 11. .

  The body 10 of the boom sprayer 1 is equipped with a tank 20 for storing a chemical solution and a pump 21 for pumping the chemical solution in the tank 20 to a spray hose (not shown) as a basic configuration. The boom 12 is provided with a spray hole (spray nozzle) 13 for spraying a chemical solution or the like fed by pressure through a spray hose. A plurality of spray holes 13 are provided along the longitudinal direction of the boom 12. In the illustrated example, the airframe 10 is equipped with a hitch mechanism 22 for connecting to the three-point link of the tractor T. Although the illustrated boom spreading device 1 shows an example of a tractor direct mounting type, the present invention is not limited to this, and the boom spreading device 1 according to the embodiment of the present invention may be a self-propelled type. Further, in the illustrated example, the body 10 is equipped with a caster 23.

  The boom opening / closing member 11 opens and closes between a lateral deployment position that intersects the traveling direction of the traveling machine body T and a folding position in which the tip side along the traveling direction of the traveling machine body T faces obliquely upward. The state shown in FIG. 1 shows a non-working state fixed at the folding position. The boom opening / closing member 11 includes a first pivot shaft 14 that is inclined with respect to the body 10 so as to fall backward in the traveling direction of the traveling body T. Further, the boom 12 detachably connected to the boom opening / closing member 11 is pivotally supported by the second pivot shaft 15 so as to swing up and down with respect to the boom opening / closing member 11 at the folding position shown in FIG. ing.

  FIG.2 and FIG.3 is explanatory drawing which showed the specific example of the boom spraying apparatus which concerns on embodiment of this invention. FIG. 2 shows a state where the boom 12 is removed from the boom opening / closing member 11, and FIG. 3 shows a state where the boom 12 is attached to the boom opening / closing member 11. The boom opening / closing member 11 pivotally supported by the first pivot shaft 14 with respect to the airframe 10 includes a connecting portion 11A for connecting the connected portion 12A of the boom 12. In the illustrated example, the connected portion 12A is a rod-like portion 12A1 extending along the boom 12, and the connecting portion 11A is a sheath-like portion 11A1 into which the rod-like portion 12A1 is inserted. Here, in the illustrated example, the boom 12 includes a boom main body 12B and a boom holding body 12C, and the above-described connected portion 12A (rod-like portion 12A1) has a base end connected to the boom holding body 12C at the second pivot. It is pivotally supported via a support shaft 15. As described above, the connected portion 12A (rod-like portion 12A1) includes the second pivot shaft 15 that swings the boom 12 up and down with respect to the boom opening / closing member 11 at the folding position.

  The boom opening / closing member 11 is elastically fixed to the airframe 10 at the deployed position and the folded position. Specifically, the boom opening / closing member 11 and the fuselage 10 are connected to each other by a first tension spring 17. When the boom opening / closing member 11 is deployed against the pulling of the first tension spring 17, the boom opening / closing member 11 is deployed to some extent. The tensile force of the first tension spring 17 acts toward the deployed position of the boom opening / closing member 11.

  On the other hand, the boom 12 is elastically fixed to the boom opening / closing member 11 in a connected state along the longitudinal direction of the boom opening / closing member 11. Specifically, the base end side of the boom 12 (or the boom holding body 12C) and the base end side of the boom opening / closing member 11 are connected to each other by the second tension spring 18, and the boom 12 extends in the longitudinal direction of the boom opening / closing member 11. Is held along. In the illustrated example, one end of the second tension spring 18 is attached to the base end of the boom holder 12C, and the other end is attached to the boom opening / closing member 11 via an attachment jig 18A.

  Here, the elastic force with which the boom opening / closing member 11 is elastically fixed to the body 10 is made larger than the elastic force with which the boom 12 is elastically fixed to the boom opening / closing member 11. That is, the elastic force (elastic constant) of the first tension spring 17 is made larger than the elastic force (elastic constant) of the second tension spring 18. As a result, the boom 12 can be rotated (vertically moved) around the second pivot shaft 15 with a relatively small force, and the deployment operation of the boom 12 via the boom opening / closing member 11 requires a relatively large force. I am doing so. The unfolding operation of the boom 12 may be performed manually or via a hydraulic or electric actuator.

  4 and 5 are explanatory views showing functions of the boom spraying apparatus according to the embodiment of the present invention. As shown in FIG. 4, at the folding position of the boom opening / closing member 11, the second pivot shaft 15 is in a substantially horizontal state. Thereby, the boom 12 (boom holding body 12C) can be swung around the second pivot shaft 15, and the tip end side of the long boom 12 can be swung up and down. By providing such a swing mechanism of the boom 12, even when the front end side of the long boom 12 interferes with the boarding position of the traveling machine body T, the boom 12 can be easily exchanged to get on and off the traveling machine body T. It can be performed. The swinging motion of the boom 12 at this time is performed against the second tension spring 18, but the boom 12 can be easily exchanged by making the elastic force of the second tension spring 18 relatively small. it can.

  FIG. 5 is an explanatory view showing a release function of the boom spraying apparatus according to the implementation system of the present invention. At the unfolded position of the boom 12 (boom opening / closing member 11), the first pivot shaft 14 is tilted backward in the traveling direction of the traveling machine body T with respect to the vertical, and the second pivot shaft 15 travels with respect to the vertical. Aircraft T has fallen forward in the direction of travel. Accordingly, the boom 12 is swingable rearward and obliquely upward around the second pivot shaft 15 at the deployed position of the boom opening / closing member 11.

  Thereby, when an obstacle hits the boom 12 during the work performed at the deployment position of the boom opening / closing member 11, the tip of the boom opening / closing member 11 is released so as to be slightly lowered, but is pivotally supported by the boom opening / closing member 11. The tip of the boom 12 is released so that it slightly rises. As a result, it is possible to obtain a folded state in which the tip of the boom 12 is directed upward, and in the deployed state of the boom 12, avoid the tip of the boom 12 from approaching the field when released when it hits an obstacle. Can do.

  In the boom spreading device 1 according to the embodiment of the present invention having such a function, first, the boom 12 is detachably connected to the boom opening / closing member 11. By removing 12, it is possible to store the boom spreading device 1 without requiring a large space. At this time, the connected portion 12A on the boom 12 side is the rod-shaped portion 12A1, and the connecting portion 11A on the boom opening / closing member 11 side is the sheath-shaped portion 11A1, so that the rod-shaped portion 12A1 is inserted into and removed from the sheath-shaped portion 11A1. The boom 12 can be attached and detached with a simple operation. Accordingly, the attaching / detaching operation can be easily performed without using a tool.

  And by providing the 2nd pivot shaft 15 in the to-be-connected part 12A (rod-shaped part 12A1) which bears a part of attachment / detachment mechanism of the boom 12 mentioned above, a part of release mechanism at the time of expansion | deployment of the boom 12 is comprised. Therefore, the second pivot shaft 15 in the release mechanism can be provided with a simple configuration. Further, the angle of the second pivot shaft 15 is substantially horizontal at the folding position of the boom opening / closing member 11, and is tilted forward with respect to the vertical at the deployed position of the boom opening / closing member 11. In the state, a function of crossing the long boom 12 up and down is obtained, and a function of regulating the direction of the boom 12 at the time of release upward when the boom 12 is deployed is obtained. As described above, since one second pivot shaft 15 exhibits different functions depending on the state of the boom 12, an effective function can be obtained with a simple structure.

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the scope of the present invention. Is included in the present invention. The embodiments described in the above drawings can be combined with each other as long as there is no particular contradiction or problem in the purpose, configuration, or the like. Moreover, the description content of each figure can become independent embodiment, respectively, and embodiment of this invention is not limited to one embodiment which combined each figure.

1: Boom spraying device, 10: Airframe, 11: Boom opening / closing member, 11A: Connecting portion,
11A1: sheath portion, 12: boom, 12A: coupled portion, 12A1: rod-shaped portion,
12B: Boom body, 12C: Boom holder, 13: Spray hole,
14: first pivot axis, 15: second pivot axis,
17: 1st tension spring, 18: 2nd tension spring,
20: Tank, 21: Pump, 22: Hitch mechanism, 23: Caster

Claims (4)

An aircraft (10) deployed behind the traveling aircraft (T);
A laterally deployed position that is pivotally supported by the airframe (10) and intersects the traveling direction of the traveling airframe (T), and a folding position in which a front end side along the traveling direction of the traveling airframe (T) faces obliquely upward. A boom opening and closing member (11) that opens and closes between,
A boom (12) detachably connected to the boom opening and closing member (11) and provided with a plurality of spray holes (13) along the longitudinal direction;
The boom opening / closing member (11) includes a connecting portion (11A) for connecting the connected portion (12A) of the boom (12),
The coupled portion (12A) of the boom (12) includes a pivot shaft (15) that swings the boom (12) up and down with respect to the boom opening / closing member (11) in the folding position. The boom spraying device (1) characterized in that the boom is swingable rearward and obliquely upward around the pivot shaft (15) at the deployed position of the boom opening / closing member (11). The connected portion (12A) is a rod-shaped portion (12A1) extending along the boom (12),
The boom spraying device (1) according to claim 1, wherein the connecting portion (11A) is a sheath-like portion (11A1) into which the rod-like portion (12A1) is inserted. The boom opening / closing member (11) is elastically fixed to the airframe (10) at the deployed position and the folded position, respectively.
The boom according to claim 1 or 2, wherein the boom (12) is elastically fixed to the boom opening / closing member (11) in a connected state along the longitudinal direction of the boom opening / closing member (11). Spraying device (1).   The elastic force for elastically fixing the boom opening / closing member (11) to the airframe (10) is larger than the elastic force for elastically fixing the boom (12) to the boom opening / closing member (11). Boom spraying device (1) according to claim 3, characterized in that

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