JP2016106557A - Chemical tank and boom sprayer using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chemical tank where an operator can readily go up to and down from a ceiling part of the chemical tank while an increase in weight is suppressed, and to provide a boom sprayer using the same.SOLUTION: Steps 28, 29 with which an operator goes up to the ceiling part 22 provided with an injection port 27a from which a chemical is injected are formed integrally with part of the chemical tank 20, especially at a left-side end and a right-side end of the front wall part 25 thereof.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a chemical liquid tank and a boom sprayer using the chemical liquid tank, and more particularly to a chemical liquid tank for storing chemical liquid such as agricultural chemicals to be sprayed on crops and a boom sprayer for spraying chemical liquid stored in the chemical liquid tank.

  2. Description of the Related Art Boom sprayers (also referred to as drug spreaders and boom spreaders) are known as machines for spraying chemicals such as control agents and herbicides in fields such as paddy fields and fields. The boom sprayer includes a boom extending laterally with respect to the traveling direction of the traveling machine body, and is supplied from a plurality of spray nozzles arranged along the longitudinal direction of the boom to the chemical liquid tank in the traveling process in the field. By spraying (spraying) the stored medicine in the form of a mist, the medicine can be efficiently sprayed over a wide range corresponding to the boom length.

  The boom sprayer is generally provided with a mechanism that folds the boom to a predetermined storage position when not working (when no medicine is sprayed). As the folding mechanism, various forms are known, but as a relatively simple mechanism, a boom extending toward the side with respect to the traveling direction of the traveling machine body is provided along the traveling direction of the traveling machine body. A mechanism that folds approximately 90 ° in the direction is known. In addition, when folding the boom in the direction along the traveling direction of the traveling machine body in this way, the front end of the boom should be rearward in consideration of interference with the traveling machine body, ease of getting on and off the traveling machine body, storage property in the warehouse, etc. It is known that the boom is folded obliquely upward or forward obliquely upward, that is, tilted forward or backward with respect to the traveling direction of the traveling machine body (see Patent Documents 1 and 2).

  The boom sprayer includes a self-propelled boom sprayer (Patent Document 1) in which a traveling machine body, a boom, a chemical solution tank, and the like are integrally mounted, and a boom, a chemical solution tank, and the like behind the traveling machine body such as a tractor. Mounted boom sprayers that are mounted (mounted), and tractor-type boom sprayers that use towed booms or chemical tanks with tractors and other traveling aircraft (Patent Documents 2 and 3) are used for various purposes. In order to do this, it is generally known that a towed boom sprayer is employed when the work part is replaced.

  In this type of boom sprayer, an injection port is generally provided in the ceiling portion of the chemical solution tank. When the boom is folded and stored as described above (when not in operation), the chemical solution (chemicals in water) is passed through the injection port. A chemical solution injection operation is performed to inject (inject) a mixture of the above. In addition, in order to replace or clean the strainer provided at the injection port, an attaching / detaching operation for attaching / detaching the strainer from the injection port, a cleaning operation for cleaning the inside of the chemical tank, and the like are also performed.

  In the conventional boom sprayer, a floor as a work table is provided around the chemical solution tank in order to ensure the workability of the chemical solution injection operation and the strainer attaching / detaching operation. For example, in the self-propelled boom sprayer described in Patent Document 1, a side floor is provided so as to project to the side of the body frame. In the towed boom sprayer described in Patent Document 3, the front part of the body frame is provided. The floor is provided above the traction device (universal shaft etc.) provided in the. The operator ascends the floor through the ascending / descending step provided toward the floor, and then opens the lid that closes the inlet provided in the ceiling portion, thereby injecting the chemical solution described above. And strainer can be attached and detached.

JP 2014-077689 A JP 2013-252105 A JP 2014-093977 A

  By the way, in recent years, for the purpose of improving the efficiency of farm work, for example, the above-described towed boom sprayer is used, and a large boom is used to spray agricultural chemicals etc. on a large field, thereby collectively managing a large field. Agricultural forms are being studied. In such an agricultural form, the capacity of the chemical tank is increased to cope with the large boom as described above, and the external shape such as the height of the chemical tank is inevitably increased. Therefore, for example, in the above-described chemical solution injection operation, a chemical such as an agrochemical is previously loaded on the ceiling portion of the chemical solution tank in a state where the worker has risen to the ceiling portion of the chemical solution tank, and is transferred to the chemical solution tank through the injection port. An operation mode in which the medicine is introduced from the injection port while water is supplied occurs.

  However, in the conventional boom sprayer, a floor for performing the above-described work is merely disposed around the chemical liquid tank, particularly the lower portion around the chemical liquid tank. It is not possible to correspond to the work mode for large chemical tanks.

  In addition, for example, it is possible to attach a ladder extending to the ceiling around the chemical tank (side or front and back), or to extend the lifting step for ascending to the floor of the above-described prior art to the ceiling. Such countermeasures cause problems such as an increase in the weight of the boom sprayer and problems such as poor workability and stability (safety) of the work of climbing up and down the ladder.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a chemical tank that allows an operator to easily move up and down to the ceiling of the chemical tank while suppressing an increase in weight. It is to provide a boom sprayer using the.

  In order to solve the above-described problem, the chemical liquid tank according to the present invention is a chemical liquid tank in which an injection port for injecting a chemical liquid is provided in a ceiling portion, and the step for ascending to the ceiling portion is the chemical liquid tank. It is characterized in that it is integrally molded with a part of.

  In a preferred embodiment, the step is provided at a corner formed in the chemical tank.

  In another preferred form, the step is formed so as to continue from the front surface of the chemical solution tank to the top surface.

  In a further preferred form, the step is provided on at least one of a left end and a right end of the front wall portion of the chemical tank.

  In another preferred embodiment, the step is provided at a plurality of locations of the chemical tank.

  In a more preferred embodiment, the inlet is provided between the plurality of steps.

  In another preferred embodiment, a handrail is provided on the side of the step to assist in raising and lowering and to prevent the chemical liquid tank from dropping or sliding down.

  In another preferred embodiment, a handle for assisting raising and lowering is provided on a side portion of the step in the ceiling portion.

  In another preferred embodiment, a tread plate provided with a slip stopper is provided on the tread surface of the step.

  In another preferred form, the stepped-up portion of the step is inclined so as to fall in the direction in which the step is formed.

  Further, the boom sprayer according to the present invention is provided with the chemical liquid tank, a boom unit provided behind the chemical liquid tank, a part of which is folded and stored on the side of the chemical liquid tank, An intermediate floor provided in front of the chemical tank and an auxiliary step for ascending to the intermediate floor are provided.

  In a preferred embodiment, the intermediate floor is provided above a traction unit provided in front of the chemical tank, and the auxiliary step is provided on at least one of the left side and the right side of the traction unit.

  In a further preferred form, the traction unit is provided at the center in the left-right direction of the chemical solution tank.

  In another preferred embodiment, the intermediate floor includes a first intermediate floor that can be raised from the auxiliary step, and at least a part of a front wall portion of the chemical tank to rise to the step from the first intermediate floor. And a second intermediate floor provided along the line.

  According to the present invention, the stepped step for ascending to the ceiling portion provided with the injection port for injecting the chemical liquid is integrally formed in a part of the chemical liquid tank, so that a separate part such as a ladder can be provided. There is no need to attach it, and the ascending / descending work becomes easier compared to a ladder or the like, so that the operator can easily ascend / descend to the ceiling of the chemical tank while suppressing an increase in weight. In addition, in the case of a ladder, it is necessary for the worker to go up and down while grasping the ladder by hand, but according to the present invention, the worker can basically move up and down without using a hand, in other words, work Since the worker can safely move up and down even while holding a work tool or the like in his hand, the workability of the worker can be significantly improved.

  In addition, since the step formed integrally with the chemical solution tank is formed so as to continue from the front surface of the chemical solution tank to the top surface, the operator can move up and down from the front side, which is the traveling machine body side, to the ceiling portion. The workability when the worker performs the various operations described above can be further enhanced.

  Furthermore, by providing the step on at least one of the left end and the right end of the front wall portion of the chemical tank, the operator can move up and down from the front side which is the traveling machine body side to the ceiling portion, The work space on the ceiling of the chemical tank, especially the work space around the inlet provided in the ceiling, can be effectively secured, so that the workability when the worker performs the various operations described above is effectively improved. Can do.

  In addition, since the steps are provided at a plurality of locations in the chemical tank, and an injection port is provided between the plurality of steps, it is possible to cope with various farm field shapes and water field arrangements. However, it is possible to improve convenience when performing various operations as described above.

  Further, a handrail is provided on the side of the step to assist in raising and lowering and to prevent the chemical tank from falling or sliding down, and a handle for assisting in raising and lowering the side part of the step in the ceiling portion. Is provided, the safety when the operator moves up and down the step can be further improved.

  Further, by providing a tread with a non-slip on the tread surface of the step, even when the step is integrally formed with the chemical tank, it is safe for an operator to raise and lower the step. Sex can be secured.

  Further, since the kicking portion of the step is inclined so as to fall in the direction in which the step is formed, when the worker climbs to the ceiling using the step, the foot is on the kicking portion. It is less likely to get caught, and it is easy for the operator to check the tread of the lower stage of the step when getting off the ceiling using the step. There is an advantage that safety at the time of raising and lowering can be further ensured and the step can be easily formed integrally with the chemical tank.

The perspective view which looked at the embodiment of the boom sprayer concerning the present invention from the left front. The perspective view which looked at the boom sprayer shown in FIG. 1 from the right front. The front view of the boom sprayer shown in FIG. The rear view of the boom sprayer shown in FIG. The left view which looked at the boom sprayer shown in FIG. 1 from the left. The right view which looked at the boom sprayer shown in FIG. 1 from the right side. The top view of the boom sprayer shown in FIG. The A section enlarged view of FIG. The B section enlarged view of FIG.

  Embodiments of a chemical tank and a boom sprayer using the same according to the present invention will be described below with reference to the drawings.

  In the following, a towed boom sprayer that is mainly used in a large boom sprayer will be described. However, the present invention can be applied to a so-called self-propelled boom sprayer, a mounted boom sprayer, and the like. Needless to say, the chemical tank of the present invention can be applied to various chemical sprayers for spraying chemicals such as agricultural chemicals or chemicals to crops and the like, in addition to boom sprayers.

  Further, in this specification, expressions representing positions and directions such as “up and down”, “left and right”, and “front and back” are used in order to avoid a complicated explanation (traveling direction of the traveling body (tractor)) Direction).

  1 and 2 are perspective views of an embodiment of a boom sprayer according to the present invention as viewed from the left front and right front. 3 to 7 are a front view, a rear view, a left side view, a right side view, and a plan view, respectively, of the boom sprayer shown in FIG. 8 is an enlarged view of a portion A in FIG. 1, and FIG. 9 is an enlarged view of a portion B in FIG. 1 to 7 show a state in which the boom is stored, and a state in which the boom sprayer portion is detached from the traveling machine body (tractor). Moreover, in FIG.8 and FIG.9, the boom stored in the side of the chemical | medical solution tank is abbreviate | omitted and shown so that the principal part of a chemical | medical solution tank can be visually recognized.

  The boom sprayer 1 shown in the figure is for spraying chemicals or chemicals such as agricultural chemicals on crops and the like while being pulled by a traveling machine body (for example, a tractor). There are two wheels 6 on the left and right sides (four in total). The fuselage frame 5 is provided with a chemical resin tank 20 made of synthetic resin at the rear part (the part where the wheel 6 is located), the traction unit 10 is mounted at the front part thereof, and the boom unit 30 is mounted at the rear end thereof. ing. Further, the chemical solution in the chemical solution tank 20 is placed between the chemical solution tank 20 of the machine body frame 5 and the traction unit 10 (particularly, a space formed by recessing the lower end side portion of the front wall portion 25 of the chemical solution tank 20). A pump 7 and the like that are pumped to the boom unit 30 (a plurality of spray nozzles 33 provided on the center boom 31 and the side boom 32) are provided.

  The boom unit 30 is mounted so as to be movable up and down with respect to the body frame 5, and is mainly provided on the center boom 31 laid horizontally in the direction perpendicular to the front-rear direction and on both the left and right sides of the center boom 31. And a pair of side booms 32, 32.

  As can be understood with reference to FIG. 4, a pair of rails 4, 4 extending in the vertical direction are fixed to the rear end of the body frame 5 side by side. A boom pedestal 30a made of a substantially rectangular frame in a long rear view is attached to be movable up and down, and the center boom 31 is attached substantially parallel to the boom pedestal 30a (at a rear position of the boom pedestal 30a). . The rails 4, 4 provided side by side are connected and held by a plurality of connecting members 4 a extending in the left-right direction at appropriate positions in the up-down direction. The boom mount 30a to which the center boom 31 is attached is moved up and down with respect to the body frame 5 by a lifting cylinder (not shown) fixed to the rails 4 and 4 and a connecting member 4a for connecting the rails 4 and 4 or the like. The whole boom unit 30 can be moved up and down with respect to the body frame 5 by being able to move up and down.

  The side booms 32, 32 are pivotally supported by the left and right ends of the boom mount 30a via the opening / closing arms 30b, 30b so as to be rotatable with respect to the center boom 31 and do not spray chemicals (when not working). ) Is folded in a direction along the front-rear direction, and as shown in the drawing, the front side is obliquely raised to the side position with respect to the body frame 5 and the chemical liquid tank 20 (in other words, so as to fall backward). Stored. In order to elastically support the long side booms 32, 32 in the folded and retracted state, the body frame 5 (a portion on the front side of the wheel 6) protrudes to the left and right sides of the chemical solution tank 20. A pair of support pillars 3, 3 extending in the vertical direction are fixed at positions, and boom receivers 3 a, 3 a are provided at predetermined positions of the support pillars 3, 3. On the other hand, when the chemical solution is sprayed (during operation), the side booms 32 and 32 are located at the left and right ends of the boom mount 30a and the center boom 31 is moved to the left and right with the vicinity of the left and right ends of the center boom 31 as rotation centers. Is extended sideways with respect to the front-rear direction at a position extending in a substantially straight line with respect to the center boom 31.

  In the illustrated example, the side booms 32 and 32 have an expansion / contraction function such that the overall length can be changed stepwise in the longitudinal direction, and are stored with the overall length shortened when not working. At the time of work, after being rotated with respect to the center boom 31 and deployed to the side, it is extended to a length corresponding to the target range to which the chemical solution is sprayed (sliding such a boom) It is also known as a ceremony boom).

  In addition, a plurality of spray nozzles 33 are arranged on the center boom 31 and the side booms 32 and 32 at predetermined intervals along the longitudinal direction of each boom. In each figure, the spray nozzle provided in the center boom 31 is omitted.

  Note that the side booms 32 and 32 do not have to have the expansion and contraction function as described above. Moreover, you may have a tilting function which can change the inclination-angle with respect to a horizontal direction centering on the both ends vicinity of the center boom 31. FIG. In addition, the boom unit 30 is configured so that the boom unit 30 (the side booms 32 and 32 thereof) does not come into contact with farmland or crops when the traveling machine body is inclined with respect to the horizontal direction during traveling or the like. More specifically, an inclination angle adjusting mechanism for maintaining the level of the center boom 31) may be provided.

  The chemical liquid tank 20 stores chemical liquid supplied to the spray nozzles 33 (spray nozzles disposed on the center boom 31 are not shown) disposed on the center boom 31 and the side booms 32 and 32 of the boom unit 30. The boom unit 30 is disposed in front of the boom unit 30 and between the side booms 32 and 32 that are folded during storage. The chemical liquid tank 20 has a substantially rectangular shape that is slightly long in the front-rear direction in plan view, and is mainly configured to face the bottom 21 placed on the machine body frame 5 and the bottom 21 so that an operator can board the vehicle. The upper surface (top surface) includes a ceiling portion 22 formed substantially flat, and a left wall portion 23, a right wall portion 24, a front wall portion 25, and a rear wall portion 26 that connect the bottom portion 21 and the ceiling portion 22. ing.

  The rear part of the left and right lower corners formed by the bottom part 21, the left side wall part 23 and the right side wall part 24 (in other words, the lower side part of the left side wall part 23 and the right side wall part 24) It is formed as a tire house that houses a part (upper part) of the wheel 6.

  Further, the front and lower corners formed by the bottom 21 and the front wall portion 25 (in other words, the lower end side portion of the front wall portion 25) are also formed to be depressed toward the inside. The pump 7 and the like are accommodated in the formed space.

  On the other hand, the center in the left-right direction of the front end and the rear end of the ceiling part 22 (substantially square-shaped part in a plan view) is slightly projected upward, and this projecting part is connected to the liquid injection parts 27, 27. Has been. Each liquid injection part 27 has a circular injection port 27a formed in a plan view at a substantially center thereof, and a lid 27b for closing the injection port 27a is attached to be openable and closable.

  Further, the left and right sides of the liquid injection part 27 formed at the center of the front end of the ceiling part 22 in the left-right direction, that is, the left and right side parts of the front end of the ceiling part 22 (in other words, the front wall part 25 of the chemical tank 20 The left end and the right end of the chemical liquid tank 20 are formed in a stepped shape, whereby the steps 28 and 29 from the front surface to the top surface of the chemical liquid tank 20 are integrally formed in the chemical liquid tank 20. In the present embodiment, each of the left and right steps 28 and 29 includes a tread surface 28a and 29a made of a substantially horizontal surface that is lowered by one step from the upper surface (top surface) of the ceiling portion 22, and a tread surface 28a made of the upper surface (top surface) of the ceiling portion 22. , 29a.

  Since the front wall portion 25 of the chemical tank 20 is slightly curved so as to protrude forward, the tread surfaces 28a and 29a of the steps 28 and 29 have a substantially parallelogram in plan view. (See FIG. 7). Further, since the upper half portion of the front wall portion 25 (the portion where the steps 28 and 29 are formed) is slightly inclined so as to fall backward, the raised portions 28c and 29c of the respective steps 28 and 29 are also moved backward. It is slightly inclined so as to fall down (see FIGS. 5, 6, and 9).

  Each step surface 28a, 29a of each step 28, 29 has an inner portion slightly higher than the outer edge portion, and the step portion 28a, 29a is prevented from slipping to the raised portion (mounting surface). In order to ensure the rigidity of 28a and 29a and to prevent damage due to scratching of the treads 28a and 29a, metal treads 28b and 29b provided with protrusions as slip stoppers are fastened and fixed by bolts. ing. In addition, the support columns 3 and 3 provided on the side of the chemical tank 20 assist the operator in raising and lowering and prevent the steps 28 and 29 (in other words, the chemical tank 20) from dropping or sliding down. The handrails 3b and 3b having a substantially inverted U shape in a side view are attached to positions corresponding to the laterally outer sides (open side sides) of the steps 28 and 29, respectively. Each handrail 3b includes an upper side portion, a lower side portion, and a vertical side portion that connects the upper side portion and the lower side portion, and the vertical side portion is connected to the support columns 3 and 3 via a connecting member. . In addition, the vertical side part of each handrail 3b is inclined so as to fall slightly backward in accordance with the inclination angle of the upper half part of the front wall part 25 (see FIGS. 5 and 6). Further, in the liquid injection part 27 on the front end side of the ceiling part 22 of the chemical liquid tank 20, the laterally inner side of each step 28, 29 (the side facing the lateral side of the chemical liquid tank 20 and the side not open) A pair of left and right handles 28d and 29d that assist the operator to move up and down are attached to portions corresponding to the side) (that is, the left and right sides of the inlet 27a provided in the liquid injection part 27). (See FIG. 8 in particular).

  Moreover, in this embodiment, an operator for performing various operations on the ceiling portion 21 on the ceiling portion 21, particularly above the portions other than the liquid injection portions 27 and 27 provided at the front end and the rear end. A work table 2 is arranged. As is well understood with reference to FIG. 7, for example, the work table 2 is mainly configured by extending a metal wire rod in a mesh shape on a substantially rectangular metal frame in a plan view. . The work table 2 has a substantially central portion supported on the ceiling portion 22 of the chemical liquid tank 20 by a central support member 2a provided on the lower surface, and left and right side ends of the rear end thereof are a pair of rear support members 2c, The support pillar 3 is connected to and supported by a connecting member 4a for connecting the rails 4 and 4 by 2c, and the left and right ends of its front end are provided on the side of the chemical tank 20 by a pair of front support members 2b and 2b. 3 to be supported.

  In addition, in this specification, in order to rise to the ceiling part 22 using the above-described steps 28 and 29, in addition to rising to the upper surface (top surface) of the ceiling part 22, It goes without saying that climbing up to the work table 2 provided in FIG.

  In addition, the said chemical | medical solution tank 20 is specifically set as the 2 division | segmentation structure which consists of an upper half part and a lower half part, and the front part (namely, upper half part of the front wall part 25) is the upper half part, It is slightly curved so as to be convex forward (see FIG. 7), and is slightly inclined so as to fall backward (see FIGS. 5 and 6). Is provided. Moreover, the space for accommodating the above-mentioned tire house and pump 7 is provided in the lower half part.

  The towing unit 10 is for connecting the boom sprayer 1 to the traveling machine body and towing it, and is disposed in front of the chemical liquid tank 20 and substantially in the center in the left-right direction. The traction unit 10 mainly includes a joint shaft 11 connected to a connecting portion of the traveling machine body, and a power transmission mechanism 12 that transmits the power of the traveling machine body (engine thereof) to the boom sprayer 1 side. .

  The joint shaft 11 is connected to the center of the front end of the body frame 5 so as to be swingable in the left-right direction. The power transmission mechanism 12 is disposed behind the joint shaft 11, and the pump 7 is driven by the power of the traveling machine body (engine) obtained through the power transmission mechanism 12. The chemical solution in 20 is pressure-fed to the spray nozzle 33 provided in the center boom 31 and the side boom 32 of the boom unit 30.

  A gate-shaped cover member 13 is attached to the front portion of the body frame 5 so as to cover the periphery of the power transmission mechanism 12 (upper and left and right sides). The substantially horizontal top plate 13a of the cover member 13 serves as a first intermediate floor 13a on which an operator can be placed, and the left and right side plates 13b and 13b of the cover member 13 are slightly inclined in the left-right direction. Auxiliary steps 14 and 14 for ascending and descending to the intermediate floor 13a are attached so as to be in the posture and substantially symmetrical. In addition, the front end of the top plate 13a of the cover member 13 assists the operator using the auxiliary steps 14 and 14, and prevents the operator from falling from the top plate (first intermediate floor) 13a. Therefore, a handrail 15 made of a substantially rectangular frame is provided in front view.

  In addition, a pair of columnar members 16, 16 arranged in the left-right direction are fixed to the body frame 5 so as to be connected to the left and right ends of the rear end of the top plate 13 a of the cover member 13 and extend in the up-down direction. . The columnar members 16 and 16 extend slightly below the steps 28 and 29 provided in the chemical tank 20 (in the illustrated example, the boundary between the upper half and the lower half of the chemical tank 20). A second intermediate floor 17 extending in the left-right direction along the front shape of the front wall portion 25 of the chemical liquid tank 20 is disposed at the upper ends of the members 16 and 16. The second intermediate floor 17 has a slight width in the front-rear direction, specifically, a width that allows an operator to place a foot.

  In the illustrated example, the width in the left-right direction of the first intermediate floor 13a is set to be equal to the width of the inlet 27a of the ceiling portion 22 of the chemical liquid tank 20, and the width in the left-right direction of the second intermediate floor 17 is The width is set to be equal to about half of the treads 28a and 29a of each step 28 and 29, but if it can be moved up and down to each step 28 and 29 via the first intermediate floor 13a and the second intermediate floor 17, The left and right widths of the first intermediate floor 13a and the second intermediate floor 17 may be set as appropriate.

  Further, the first intermediate floor 13a and the second intermediate floor 17 are provided with convex portions as slip stoppers.

  In the boom sprayer 1 configured as described above, a chemical solution injection operation for introducing (injecting) a chemical solution such as agrochemicals through the injection port 27a provided in the ceiling portion 22 of the chemical solution tank 20, or a strainer (not used) from the injection port 27a. The attachment / detachment work for attaching and detaching, and the cleaning work for cleaning the inside of the chemical liquid tank 20 are generally performed in a state in which the side booms 32 and 32 of the boom unit 30 are folded to the side of the body frame 5 or the chemical liquid tank 20 (stored state). However, the operator ascends from the front side (traveling machine body side) of the chemical tank 20 to the ceiling portion 22 (the top surface thereof) so as not to interfere with the folded side booms 32, 32, and on the ceiling portion 22. The above-described various operations can be performed.

  Specifically, when the operator performs the various operations described above, for example, while grasping the handrail 15, the auxiliary step 14 provided on the side of the power transmission mechanism 12 of the traction unit 10 is used. Ascending on the top plate (first intermediate floor) 13 a of the cover member 13 above the power transmission mechanism 12. Next, while grasping the handrail 3b and the handles 28d and 29d provided on the sides of the steps 28 and 29, the foot is placed on the second intermediate floor 17 from the top plate (first intermediate floor) 13a of the cover member 13. However, it rises to the lower stage of the steps 28 and 29 provided on the left and right ends of the front wall portion 25 of the chemical tank 20 (the treads 28a and 29a stepped down from the top surface of the ceiling portion 22). From there, for example, using the handrail 3b, it is possible to ascend to the upper stage of steps 28 and 29, that is, the ceiling portion 22.

  In addition, when the various operations described above are completed on the ceiling portion 22, it is possible to descend from the ceiling portion 22 to the ground without interfering with the folded side booms 32 and 32 by a procedure reverse to the above-described procedure.

  As described above, according to the boom sprayer 1 of the present embodiment, the stepped steps 28 and 29 for ascending (mounting) the ceiling portion 22 provided with the injection port 27a for injecting the chemical solution are provided in the chemical solution tank 20. Since it is partly molded in one part, it is not necessary to attach a separate part such as a ladder, and it is easier to ascend and descend compared to a ladder, etc. However, it can be easily moved up and down to the ceiling portion 22 of the chemical solution tank 20. Further, in the case of a ladder, it is necessary for the worker to ascend and descend while grasping the ladder by hand, but according to the boom sprayer 1 of the present embodiment, the worker holds a work tool or the like in his hand. Since it can be lifted and lowered safely even in a state, the workability of the worker can be significantly improved.

  In addition, since the steps 28 and 29 formed integrally with the chemical liquid tank 20 are formed so as to continue from the front surface of the chemical liquid tank 20 to the top surface, the operator can move from the front side which is the traveling machine body side to the ceiling portion 22. Since it can be moved up and down, the workability when the operator performs the various operations described above can be further enhanced.

  Further, the steps 28 and 29 include the left end and the right end of the front wall portion 25 of the chemical tank 20 (the corner portion formed by the front wall portion 25 and the left side wall portion 23, and the front wall portion 25 and the right side wall). Provided at the corner portion formed by the portion 24), the operator can move up and down from the front side, which is the traveling machine body side, to the ceiling portion 22 and work on the ceiling portion 22 of the chemical tank 20 Since the space, particularly the work space around the inlet 27a provided in the ceiling portion 22 can be effectively secured, the workability when the worker performs the various operations described above can be effectively improved.

  Further, the steps 28 and 29 are provided at a plurality of locations in the chemical liquid tank 20, and the inlet 27a is provided between the plurality of steps 28 and 29. It is possible to deal with the place arrangement, and it is possible to improve convenience when the worker performs various kinds of work as described above.

  Further, handrails 3b and 3b are provided on the sides of the steps 28 and 29 to assist the raising and lowering and prevent the chemical liquid tank 20 from dropping or sliding down. Since the handles 28d and 29d for assisting the raising and lowering are provided at the side portions, the safety when the operator raises and lowers the steps 28 and 29 can be further improved.

  Further, the step surfaces 28a and 29a of the steps 28 and 29 are provided with the tread plates 28b and 29b provided with the anti-slip, so that the steps 28 and 29 are integrally formed with the chemical tank 20. In addition, it is possible to ensure safety when the operator moves up and down steps 28 and 29.

  Further, since the kicked portions 28c and 29c of the steps 28 and 29 are inclined so as to fall in the direction (rearward) in which the steps 28 and 29 are formed, the operator can perform the steps 28 and 29. Steps 28, 29c are less likely to be caught by the lifted portions 28c, 29c when climbing to the ceiling portion 22 and when the operator descends the ceiling portion 22 using the steps 28, 29. Since it becomes easy to confirm the lower treads 28a and 29a of the 29, the ascending / descending work is facilitated, the safety when the operator ascends and descends the steps 28 and 29 can be further secured, and the steps 28 and 29 can be performed. There is also an advantage that the chemical liquid tank 20 can be easily molded integrally.

  In the above-described embodiment, the steps 28 and 29 formed integrally with the chemical liquid tank 20 are provided at the left end and the right end of the front wall portion 25 of the chemical liquid tank 20. If it can be lifted, the step may be formed in another position of the chemical tank 20 (for example, the front side and the rear side, the left side and the right side, the front side and the left side, and / or the right side). In the embodiment described above, the steps 28 and 29 are provided at a plurality of locations in the chemical tank 20, but it is needless to say that the number of steps can be appropriately selected. In the above-described embodiment, the metal treads 28b and 29b provided with convex portions as slip stoppers are attached to the treads 28a and 29a of the steps 28 and 29, but the treads 28a of the steps 28 and 29 are provided. , 29a may be integrally formed with a protrusion as a slip stopper. Needless to say, the number of steps 28 and 29, the shape of the tread, the dimensions of the tread and the kick-up, the gradient, and the like can be changed as appropriate according to the size of the chemical tank 20 and the operator's request.

  In the above-described embodiment, the worker ascends to the ceiling portion 22 through the first intermediate floor 13a, the second intermediate floor 17, and steps 28 and 29 in consideration of the size of the chemical tank 20 and the like. However, for example, the first intermediate floor 13a and the second intermediate floor 17 may be omitted if the step for ascending from the ground to the ceiling portion 22 can be formed in the chemical tank 20, or the first intermediate floor may be omitted. The first intermediate floor 13a and the second intermediate floor 17 may be formed integrally (as one member) by designing the 13a and the second intermediate floor 17 to have the same height.

DESCRIPTION OF SYMBOLS 1 Boom sprayer 2 Work bench 2a Center support member 2b Front support member 2c Back support member 3 Support pillar 3a Boom receiver 3b Handrail 4 Rail 4a Connection member 5 Airframe frame 6 Wheel 7 Pump 10 Traction unit 11 Joint shaft 12 Power transmission mechanism 13 Cover member 13a Cover member top plate (first intermediate floor)
13b Cover member side plate 14 Auxiliary step 15 Handrail 16 Columnar member 17 Second intermediate floor 20 Chemical solution tank 21 Bottom portion 22 Ceiling portion 23 Left side wall portion 24 Right side wall portion 25 Front wall portion 26 Rear wall portion 27 Injection portion 27a Note Inlet 27b Lid 28, 29 Steps 28a, 29a Tread 28b, 29b Tread 28c, 29c Kick-up portion 28d, 29d Handle 30 Boom unit 30a Boom base 30b Open / close arm 31 Center boom 32 Side boom 33 Spray nozzle

Claims (14)

A chemical liquid tank provided in the ceiling with an injection port for injecting chemical liquid,
The chemical liquid tank is characterized in that a step for ascending to the ceiling part is integrally formed with a part of the chemical liquid tank.   The said step is provided in the corner | angular part formed in the said chemical | medical solution tank, The chemical | medical solution tank of Claim 1 characterized by the above-mentioned.   The chemical liquid tank according to claim 1, wherein the step is formed so as to continue from the front surface to the top surface of the chemical liquid tank.   The chemical liquid tank according to claim 3, wherein the step is provided in at least one of a left end and a right end of a front wall portion of the chemical liquid tank.   The chemical liquid tank according to any one of claims 1 to 4, wherein the step is provided at a plurality of locations of the chemical liquid tank.   The chemical solution tank according to claim 5, wherein the injection port is provided between the plurality of steps.   The chemical liquid tank according to any one of claims 1 to 6, wherein a handrail is provided at a side of the step to assist in raising and lowering and to prevent the chemical liquid tank from falling or sliding down. .   The chemical tank according to any one of claims 1 to 7, wherein a handle that assists in raising and lowering is provided on a side portion of the step in the ceiling portion.   The chemical tank according to any one of claims 1 to 8, wherein a tread having a slip stopper is provided on a tread surface of the step.   The chemical tank according to any one of claims 1 to 9, wherein the kick-up portion of the step is inclined so as to fall in a direction in which the step is formed. The chemical tank according to any one of claims 1 to 10,
A boom unit provided at the rear of the chemical tank, a part of which is folded and stored on the side of the chemical tank;
An intermediate floor provided in front of the chemical tank to rise to the step;
A boom sprayer comprising: an auxiliary step for ascending to the intermediate floor.   The intermediate floor is provided above a traction unit provided in front of the chemical tank, and the auxiliary step is provided on at least one of the left side and the right side of the traction unit, The boom sprayer according to claim 11.   The boom sprayer according to claim 12, wherein the traction unit is provided at the center in the left-right direction of the chemical liquid tank. The intermediate floor is provided along a first intermediate floor that can be raised from the auxiliary step, and at least a part of a front wall portion of the chemical tank to rise from the first intermediate floor to the step. The boom sprayer according to any one of claims 11 to 13, comprising a second intermediate floor.

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