JP2016043317A - Chemical tank fixing structure for chemical spray apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chemical tank fixing structure for a chemical spray apparatus, which can disperse a stress to be applied to a chemical tank.SOLUTION: In a chemical tank fixing structure for a chemical spray device having a chemical tank 2 fixed in a frame, the frame comprises: a support part 80 placing the chemical tank 2 thereon for supporting the chemical tank 2 from therebelow; and an abutment part 90 extending to enclose at least either the side faces of the longitudinal or transverse direction at a position in the height direction of the chemical tank 2 so that it can abut against said two side faces.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a drug tank fixing structure of a drug spraying device.

  A boom sprayer, which is a kind of chemical spraying device for intermediate management work in paddy fields and field crops, has a chemical tank that stores liquid chemicals, a boom nozzle device that sprays chemicals, and a boom that sucks the chemicals in the chemical tanks. And a pump device for pumping to the nozzle device. Such boom sprayers include a self-propelled type that has been incorporated into the traveling vehicle from the beginning of the design and a mounting type that is detachably mounted on the traveling vehicle.

  The drug tank of the drug spraying device described in Patent Literature 1 is a synthetic resin molded product. This medicine tank has a rib in which a nut is embedded by insert molding. A pump device or the like is attached using this nut.

JP 2007-117920 A

  In addition to the above-described drug tank fixing structure, for example, a structure in which an anchor bolt is provided on the bottom surface of the drug tank and the drug tank is fixed to the frame using a nut may be used. Also, a structure in which a joint member is arranged in the front-rear direction so as to pass through the inside of the drug tank near the center in the height direction of the drug tank, the front end of the joint member is fixed to the frame, and the rear end is fixed to the mast. Also mentioned. In this case, a water leakage preventing packing is interposed between the joint member and the chemical tank.

  Since the chemical tank of the boom sprayer is generally tall, a large load is applied when the machine is shaken in the left-right direction. When the anchor bolt fixing structure as described above is adopted, the anchor bolt fixing part supports the load that the drug tank is about to fall down, so stress may be applied to this part, possibly leading to damage to the drug tank. is there. The anchor bolt fixing portion is provided on the frame. For example, when the anchor bolt portion is fixed with a nut when the position accuracy (for example, parallelism and height) of the fixing member in the frame is not obtained, the drug tank is generally used. Since the strength is lower than that of the frame, the medicine tank is twisted and fixed. This also causes stress on the part, which may lead to damage of the medicine tank.

  An object of this invention is to provide the chemical | medical agent tank fixing structure of the chemical | medical agent spraying apparatus which can distribute the stress concerning a chemical | medical agent tank.

  In the medicine tank fixing structure (X) of the medicine spraying device (1) in which the medicine tank (2) is fixed to the frame (10), the medicine tank (2) is placed on the frame (10). At a certain position in the height direction of the medicine tank (2) that supports the medicine tank (2) from below, the medicine tank (2) extends so as to surround at least two sides of the front and rear or the left and right. And a contact portion (90) capable of contacting the two side surfaces.

  According to the medicine tank fixing structure (X) of the medicine spraying device (1), the medicine tank (2) is supported from below by the support portion (80). Furthermore, at least one of the front and rear sides or the left and right sides of the medicine tank (2) is surrounded by the contact portion (90). When liquid is put into the medicine tank (2), the medicine tank (2) swells back and forth or right and left. At this time, the contact portion (90) comes into close contact with the swelled drug tank (2), and at the same time, the contact portion (90) suppresses the bulge of the drug tank (2) from front to back or from side to side. Thereby, a chemical | medical agent tank (2) is fixed reliably. According to this fixed structure (X), even when a load is applied to the drug tank (2) as the drug spraying device (1) moves, the stress applied to the drug tank (2) Distributed at least on either side. As a result, damage to the medicine tank (2) can be prevented.

  The abutting portion (90) extends so as to surround the four front, rear, left and right sides at a certain position in the height direction of the medicine tank (2), and can abut on the four side surfaces. According to this configuration, the medicine tank (2) is surrounded by the contact portion (90) on the four front, rear, left and right side surfaces, and contacts the contact portion (90). Therefore, the stress applied to the medicine tank (2) can be further dispersed.

  The medicine tank (2) has a stepped portion (70) whose upper side is increased in the middle portion in the height direction, and the contact portion (90) is disposed below the stepped portion (70) to form a stepped portion. The mounting part (95) which can mount (70) is included. According to this configuration, since the step portion (70) can be placed on the placement portion (95) of the contact portion (90), the weight of the medicine tank (2) is in contact with the support portion (80). It can disperse | distribute and support in a part (90).

  The frame (10) is attached to the front frame (20), which is opposed to the lower side (65) and the front side (61) of the drug tank (2) and is open on the upper side and the rear side, and the front frame (20). A rear frame (30) facing the rear side (62) of the medicine tank (2), and attached to the front frame (20) or the rear frame (30), at least on the right side (63) of the medicine tank (2). A right frame (40R) that opposes the left frame (40L) that is attached to the front frame (20) or the rear frame (30) and that opposes at least the left side (64) of the medicine tank (2), and the front frame (20) or a pressing frame (50) attached to the rear frame (30) and pressing the medicine tank (2) from above. According to this configuration, the front frame (20) has the function of the support portion (80), and the front frame (20), the rear frame (30), the right frame (40R), and the left frame (40L) The function of the contact portion (90) is provided. When the frame is assembled, the medicine tank (2) is first placed on the front frame (20), and the rear frame (30) is attached to the front frame (20) while contacting the medicine tank (2). Further, the right frame (40R) and the left frame (40L) are attached to the front frame (20) or the rear frame (30) while being in contact with the medicine tank (2), respectively. Then, the pressing frame (50) is attached to the front frame (20) or the rear frame (30) while being pressed against the medicine tank (2). In this way, the frame can be assembled smoothly without any trouble while reliably bringing each frame into contact with each contact portion of the medicine tank (2).

  The medicine tank (2) has a convex portion projecting forward in the middle portion in the left-right direction on the front side (61), and the front frame (20) is a pair of abuttable to the left and right side portions of the convex portion. It has a front contact part (F1). According to this configuration, when the medicine tank (2) is placed on the front frame (20), the medicine tank (2) can be easily positioned.

  The medicine spraying device (1) is a tractor mounting type, the front frame (20) has a tractor mounting portion (27), the lower end of the rear frame (30) is fixed to the front frame (20), and the right frame Each of (40R) and the left frame (40L) is connected to both the front frame (20) and the rear frame (30). According to this configuration, the fixing strength of the rear frame (30) with respect to the front frame (20) in the frame attached to the tractor can be improved.

  According to the present invention, the stress applied to the medicine tank (2) can be dispersed, and as a result, the medicine tank (2) can be prevented from being damaged.

It is the perspective view which looked at the chemical | medical agent spraying apparatus to which the chemical | medical agent tank fixing structure which concerns on embodiment of this invention was applied from back. It is the perspective view which looked at the medicine distribution device of Drawing 1 from the front. It is the perspective view which looked at the chemical | medical agent tank fixing structure in FIG. 1 from the front. It is the perspective view which looked at the chemical | medical agent tank fixing structure in FIG. 1 from back. It is the perspective view which looked at the chemical | medical agent tank fixing structure in FIG. 1 from back. It is the perspective view which looked at the chemical | medical agent tank from the front. It is the perspective view which looked at the chemical | medical agent tank from the front. It is the perspective view which looked at the chemical | medical agent tank from back. It is the perspective view which looked at the chemical | medical agent tank from back. It is the perspective view which looked at the flame | frame from the front. It is the perspective view which looked at the frame from back. It is a disassembled perspective view of a front side frame and a press frame. It is a disassembled perspective view of a back side frame, a right side frame, a left side frame, and a press frame.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant descriptions are omitted. As used in this specification and claims, the terms indicating the direction such as “up”, “down”, “left”, “right”, “front”, “rear”, etc. In a state where the medicine spraying device is installed in a tractor or the like), the state in which the normal forward direction of the traveling vehicle is defined as the front is used as a reference.

  As shown in FIGS. 1 and 2, the boom sprayer 1 is a medicine spraying device attached to the rear part of a tractor (not shown). As in the prior art, the boom sprayer 1 includes a chemical tank 2 that is a molded product of a synthetic resin, a pump device 3 that sucks and pumps a liquid chemical in the chemical tank 2, and a chemical that is sent from the pump device 3. And a boom nozzle device 4 for spraying.

  The boom sprayer 1 includes a frame 10 for fixing the medicine tank 2. The frame 10 fixes the boom sprayer 1 to the traveling vehicle. The frame 10 is mainly made of steel, and is attached to the front frame 20 disposed below and in front of the medicine tank 2, the rear frame 30 disposed behind the medicine tank 2, the front frame 20 and the rear frame 30. It has a right frame 40R and a left frame 40L that are connected and extend along the left and right sides of the drug tank 2, and a pressing frame 50 that extends along the front and rear of the drug tank 2, respectively. The boom sprayer 1 includes a fixing structure (medicine tank fixing structure) X for fixing the drug tank 2 by a frame 10 disposed so as to surround the drug tank 2.

  The boom nozzle device 4 includes a turn boom 6 attached to the rear portion of the rear frame 30 so as to be swingable in the horizontal direction, and a side boom attached to a tip portion of the turn boom 6 so as to be swingable in the vertical direction and the horizontal direction. 7. By swinging the turn boom 6 180 degrees, the side boom 7 can be extended to the right and left. When working with the boom sprayer 1, the turn boom 6 and the side boom 7 are arranged substantially in a straight line, and the side boom 7 is extended in the right direction or the left direction. A liquid feed pipe 8 is attached to the side boom 7, and the medicine pressure-fed from the pump device 3 is jetted from the nozzle 9 of the liquid feed pipe 8. A plurality of nozzles 9 are provided at the lower part of the frame 10 so that the medicine can be sprayed also to the lower part of the tractor. The boom sprayer 1 is not limited to the type in which the side boom 7 is attached only to either one of the left and right directions, but may be a type in which a pair of left and right side booms are attached to both ends of the center boom.

  The medicine tank 2 is placed on the front frame 20 of the frame 10, and the front, rear, left and right side surfaces are surrounded by the front frame 20, the rear frame 30, the right frame 40R, and the left frame 40L. For example, the medicine tank 2 made of a resin such as polyethylene swells when the medicine is filled therein and abuts the frame 10 at a plurality of portions. The medicine tank 2 is fixed to the frame 10 without using an anchor bolt or the like. That is, the medicine tank 2 is supported by the frame 10 and is fixed only by being surrounded and pressed by the frame 10.

  As shown in FIGS. 3 to 5, the front frame 20 is a portion forming the skeleton of the frame 10, and the upper and rear sides thereof are open. The front frame 20 faces the front side 61 of the medicine tank 2. The medicine tank 2 is placed on the front frame 20. The rear frame 30 is attached to the front frame 20 and faces the rear side 62 of the medicine tank 2. The right frame 40R is attached to the front frame 20 and the rear frame 30, and faces the right portion 63 and the right portion of the front side 61 of the medicine tank 2. The left frame 40L is attached to the front frame 20 and the rear frame 30 and faces the left portion 64 and the left portion of the front side 61 of the medicine tank 2. The pressing frame 50 is attached to each of the front frame 20 and the rear frame 30 and faces the front side 61 and the rear side 62 of the medicine tank 2.

  The front frame 20, the rear frame 30, the right frame 40 </ b> R, the left frame 40 </ b> L, and the pressing frame 50 each have a contact surface that can contact the outer surface of the medicine tank 2. In other words, the frame 10 has one or a plurality of contact surfaces on the front side 61, the rear side 62, the right side 63, the left side 64, and the upper side of the medicine tank 2. Each contact surface is a part of each surface. Each contact surface is in contact with the outer surface of the drug tank 2 in a state where the drug tank 2 is not filled with the drug, or extends along the outer surface of the drug tank 2 and has a slight gap to the outer surface. Opposite to. In other words, each contact surface is close to the outer surface in a state substantially parallel to the outer surface of the medicine tank 2. Each contact surface is in close contact with the outer surface of the drug tank 2 when the drug tank 2 is filled with the drug (particularly when the tank is full). The frame 10 holds the drug tank 2 by the contact surfaces formed on the top, bottom, front, back, left and right being in close contact with the outer surface of the drug tank 2. Hereinafter, each frame will be described.

  As shown in FIGS. 10, 11, and 12, the front frame 20 supports the lower side 65 of the medicine tank 2 and can come into contact with the front side 61 of the medicine tank 2. A portal-type upper end bracket 22 that presses the drug tank 2 from above is connected to the upper end of the front frame 20 at the front side 61 of the drug tank 2. The front frame 20 has a pair of horizontal members 23a and a plurality of vertical members 23b, and a leg portion 23 placed on the tractor, and is fixed on the leg portion 23 to form a rectangular frame shape. 2, the base portion 24 facing the lower side 65, the inclined portion 25 connected to the front end of the base portion 24 and projecting diagonally upward (forward), and connected to the upper end of the inclined portion 25 to form a rectangular frame shape. And a front portion 26 facing the front side 61 of the medicine tank 2. These leg part 23, base part 24, inclined part 25, and front part 26 are integrated by welding or bolt connection. The upper end bracket 22 is, for example, bolted to the upper end of the front surface portion 26. A pair of connection pins (tractor mounting portions) 27 and 27 to be mounted on the lower link of the tractor are fixed to the lower end portion of the inclined portion 25.

  As shown in FIGS. 10, 11, and 13, the rear frame 30 can come into contact with the rear side 62 of the medicine tank 2. A rectangular upper end bracket 32 that presses the drug tank 2 from the upper side on the rear side 62 of the drug tank 2 is connected to the upper end of the rear frame 30. The rear frame 30 has a pair of vertical members 33 that are spaced apart in parallel in the left-right direction and a lower end member 34, a horizontal member 35, a horizontal member 36, and an upper end member 37 that are disposed between the vertical members 33. . The lower end member 34, the horizontal member 35, the horizontal member 36, and the upper end member 37 are spaced apart in the vertical direction and arranged in parallel. The lower end member 34, the horizontal member 35, and the upper end member 37 are disposed so as to be accommodated between the vertical members 33 in the left-right direction, and project forward from the vertical member 33. The horizontal member 36 projects forward from the vertical member 33 and protrudes to the left and right of the pair of vertical members 33. The lower end member 34, the lateral member 35, the lateral member 36, and the upper end member 37 are integrated by welding or bolt connection. The upper end bracket 32 is, for example, bolted to the upper end member 37.

  The rear frame 30 is connected to the front frame 20. More specifically, the lower end member 34 and the vertical member 33 of the rear frame 30 are fixed to the rear end portion of the base portion 24 of the front frame 20. The front portion 26 and the upper end bracket 22 of the front frame 20 face the front side 61 of the medicine tank 2, and the entire rear frame 30 faces the rear side 62 of the medicine tank 2. The front surface portion 26 and the upper end bracket 22 and the rear frame 30 extend in the vertical direction and are substantially parallel to each other. In this way, a frame that surrounds the lower side 65, the front side 61, and the rear side 62 of the medicine tank 2 in a substantially U shape is formed.

  The right frame 40R includes a right curved bracket 41 that can abut on the right side 63 and the right side of the front side 61 of the medicine tank 2. As shown in FIG. 13, the right curved bracket 41 includes a straight portion 41 a that extends linearly along the right side 63 of the drug tank 2 and a straight portion 41 c that extends along the right portion of the front side 61 of the drug tank 2. And a curved portion 41b extending between the straight portions 41a and 41c so as to follow the curved portion of the medicine tank 2 (corresponding to a ridge portion between the front side 61 and the right side 63).

  The left frame 40 </ b> L includes a left curved bracket 42 that can abut on the left side 64 and the left side portion of the front side 61 of the medicine tank 2. The left curved bracket 42 includes a straight portion 42a extending linearly along the left side 64 of the drug tank 2, a straight portion 42c extending along the left portion of the front side 61 of the drug tank 2, and the straight portions 42a, 42b, and a curved portion 42b extending along the curved portion of the medicine tank 2 (corresponding to a ridge between the front side 61 and the left side 64).

  The front end of the right curved bracket 41 (that is, the left end of the straight portion 41c) is connected to the upper right end of the front portion 26 of the front frame 20 by bolting or the like. The rear end of the right curved bracket 41 (that is, the rear end of the straight portion 41a) is connected to the right end of the lateral member 36 of the rear frame 30 by bolting or the like.

  The front end of the left curved bracket 42 (that is, the right end of the straight portion 42c) is connected to the upper left end of the front portion 26 of the front frame 20 by bolting or the like. The rear end of the left curved bracket 42 (that is, the rear end of the straight portion 42a) is connected to the left end of the lateral member 36 of the rear frame 30 by bolting or the like. As described above, the structure in which each of the right curved bracket 41 and the left curved bracket 42 is coupled to both the front frame 20 and the rear frame 30 increases the strength of the substantially U-shaped frame described above. It has been.

  Then, with reference to FIGS. 6-9, the shape of the chemical | medical agent tank 2 is demonstrated. The medicine tank 2 has a stepped portion 70 whose upper end is large at an intermediate portion in the height direction. The step portion 70 is provided over substantially the entire area of the front side 61, the right side 63, the rear side 62, and the left side 64, and extends horizontally so as to go around the body of the drug tank 2. The width of the stepped portion 70 is relatively large on the front side 61, right side 63 and left side 64, and relatively small on the rear side 62 (see FIGS. 7 and 9).

  As shown in FIGS. 6 and 7, the medicine tank 2 has a convex portion 71 protruding forward by a predetermined length in the middle portion of the front side 61 in the left-right direction. The convex portion 71 has a rectangular outer shape, and is formed over the stepped portion 70. If the lower portion of the stepped portion 70 is the lower portion 71a and the upper portion of the stepped portion 70 is the upper portion 71b, the front surface of the lower portion 71a and the front surface of the upper portion 71b are smoothly continuous. Since the lower portion 71a is provided, the protrusion width in the front-rear direction is larger than that of the upper portion 71b.

  As shown in FIG. 8 and FIG. 9, the medicine tank 2 has a protruding portion 72 that protrudes rearward by a predetermined length at an intermediate portion of the rear side 62 in the left-right direction. If the lower portion of the stepped portion 70 is the lower portion 72a and the upper portion of the stepped portion 70 is the upper portion 72b, the front surface of the lower portion 72a and the front surface of the upper portion 72b are smoothly continuous. The lower portion 72a has a single rectangular shape. The upper part 72b is divided into three in the left-right direction and is separated from each other.

  The medicine tank 2 has a concave portion 73 at a position near the upper side 66 in the middle portion of the front side 61 in the left-right direction. A horizontally extending step 73 a is formed at the lower end of the recess 73. As shown in FIGS. 6 and 8, the medicine tank 2 has a concave portion 74 extending in the front-rear direction in the middle portion of the upper side 66 in the left-right direction. The recess 74 is formed so as to penetrate from the front side 61 to the rear side 62, and the recess 73 and the recess 74 communicate with each other at a position corresponding to a ridge between the rear side 62 and the upper side 66.

  Subsequently, a method for assembling the frame 10 and the drug tank 2 to the frame 10 will be described. When the frame 10 is assembled, the medicine tank 2 is first placed on the front frame 20. At this time, as shown in FIGS. 6, 7, and 12, the contact portions f <b> 1 and f <b> 1 formed on the left and right side surfaces of the lower portion 71 a of the convex portion 71 are used as a pair of inner side surfaces of the front surface portion 26 of the front frame 20. (Front side abutting part) Abuts on F1 and F1. The distance between the inner side surfaces F1 in the left-right direction is slightly larger than the width in the left-right direction of the lower portion 71a of the convex portion 71, and the inner side surface F1 serves as a guide surface, which facilitates the positioning of the medicine tank 2. ing. When the medicine tank 2 is placed, the upper end surface F2 of the inclined portion 25 of the front frame 20 contacts an inclined contact portion f2 formed at the lower end of the lower portion 71a. In this contact portion, the inclined portion 25 and the front side 61 are in contact with each other on two surfaces, a horizontal surface and an inclined surface. Further, the rear surface F3 of the upper end portion of the front surface portion 26 contacts the rectangular contact portion f3 of the upper end portion of the lower portion 71a. At the same time, the two contact portions bo1 and bo1 on the lower side 65 of the medicine tank 2 are placed on the two horizontal placement surfaces BO1 and BO1 attached in the middle of the inclined portion 25 of the front frame 20. Is done. 6, 7, and 12, the abutting portions are hatched for easy understanding (this also applies to FIGS. 8, 9, and 13).

  Next, the rear frame 30 is assembled while being brought into contact with the rear side 62 of the medicine tank 2 and attached to the front frame 20. At this time, as shown in FIGS. 8, 9, and 13, the L-shaped surface BA <b> 1 of the transverse member 35 of the rear frame 30 corresponds to the ridge at the lower end of the rear side 62 of the medicine tank 2. It abuts against the abutting portion ba1 formed at the position. At this contact portion, the lower end member 34 and the rear side 62 are in contact with each other on two surfaces, a horizontal surface and a vertical surface. At the same time, the center front surface BA2 of the lateral member 36 contacts the contact portion ba2 of the lower portion 72a of the projecting portion 72, and the center front surface BA3 of the upper end member 37 contacts the contact portion ba3 of the upper portion 72b of the projecting portion 72. Abut.

  Next, the right curved bracket 41 and the left curved bracket 42 are assembled while being brought into contact with the medicine tank 2, and are attached to the front frame 20 and the rear frame 30. At this time, the inner peripheral surface R1 of the right curved bracket 41 contacts the lower curved contact portion r1 (see FIGS. 6, 7 and 9) of the stepped portion 70, and the inner peripheral surface L1 of the left curved bracket 42. Comes into contact with the curved contact portion 11 (see FIGS. 6 and 7) on the lower side of the stepped portion 70. Further, the right curved bracket 41 and the left curved bracket 42 are disposed immediately below the step portion 70, and the upper surface 41 d of the right curved bracket 41 and the upper surface 42 d of the left curved bracket 42 face each other close to the step portion 70. (That is, the stepped portion 70 can be placed when the medicine tank 2 is filled with medicine).

  Next, the upper end bracket 22 is attached to the front frame 20. At this time, as shown in FIG. 6 and FIG. 12, two abutting portions of the upper end edge of the upper portion 71b of the upper portion 71b are two L-shaped surfaces T1 and T1 protruding rearward from the upper end of the upper end bracket 22. Abuts on t1 and t1. At this contact location, the upper end bracket 22 and the front side 61 are in contact with each other on two surfaces, a horizontal plane and a vertical plane. The upper end bracket 22 presses the contact portion t1 of the convex portion 71 from the upper side by a surface T1 having an L-shaped cross section. Further, the upper end bracket 32 is attached to the rear frame 30. At this time, as shown in FIGS. 8 and 13, the lower surface T2 of the portion protruding forward from the upper end of the upper end bracket 32 is fitted into the recess 73, and the step 73a (abutting portion t2) at the lower end of the recess 73 is inserted. ). The upper end bracket 32 presses the contact portion t2 of the recess 73 from above by the lower surface T2 of the portion protruding forward. As described above, the upper end bracket 22 and the upper end bracket 32 constitute a pressing frame 50 that presses the medicine tank 2 from above. As described above, the pressing frame 50 of the present embodiment is connected to the front frame 20 and the rear frame 30, and is formed on the front side 61 and the rear side 62 at a position lower than the upper end of the medicine tank 2, or The drug tank 2 is pressed against (in contact with) the recess.

  The frame 10 and the medicine tank 2 are assembled by a series of assembling operations as described above. As described above, the frame 10 can be assembled smoothly without any trouble while reliably bringing the frames into contact with the contact portions of the medicine tank. Further, when the medicine tank 2 is filled with the medicine, the medicine tank 2 swells forward, backward, left and right, so that each contact surface of the frame 10 (particularly the contact portion 90) is in close contact with each contact portion of the medicine tank 2. The frame 10 securely holds the medicine tank 2.

  In the fixing structure X of the medicine tank 2 configured and assembled as described above, the inclined portion 25 and the front surface portion 26 of the front frame 20 correspond to the support portion 80 that supports the medicine tank 2 from below (see FIG. 3). ). Further, the front portion 26 of the front frame 20, the lateral member 36 of the rear frame 30, the right curved bracket 41 of the right frame 40R, and the left curved bracket 42 of the left frame 40L are positioned in the height direction of the drug tank 2 (specifically (In the middle position where the stepped portion 70 is formed), it extends so as to surround the front side 61, the rear side 62, the right side 63, and the left side 64 of the medicine tank 2 and can contact these side surfaces. This corresponds to the contact portion 90 (see FIGS. 3 and 4).

  Furthermore, the upper surface 41d of the right curved bracket 41 and the upper surface 42d of the left curved bracket 42 disposed immediately below the stepped portion 70 correspond to a mounting portion 95 on which the stepped portion 70 can be placed (see FIGS. 10 and 11). ).

  According to the fixing structure X of the medicine tank 2 described above, the medicine tank 2 is supported from below by the support portion 80. Further, the front, rear, left and right four side surfaces of the medicine tank 2 are surrounded by the abutment portion 90. When liquid is put into the medicine tank 2, the medicine tank 2 swells back and forth and left and right. At this time, the contact portion 90 comes into close contact with the swelled drug tank 2, and at the same time, the contact portion 90 suppresses the bulge of the drug tank 2 in the front-rear and left-right directions. Thereby, the chemical | medical agent tank 2 is fixed reliably. According to the fixing structure X, even when a load is applied to the medicine tank 2 as the boom sprayer 1 moves, the stress applied to the medicine tank 2 is distributed to the lower side, the front, back, left and right sides. As a result, damage to the medicine tank 2 can be prevented.

  In the fixing structure X, the frame 10 is fixed so as to wrap the medicine tank 2 as a whole. Therefore, even if the boom sprayer 1 is swung from side to side and the medicine tank 2 is about to fall down, the frame 10 holds the medicine tank 2. Hold in many ways. Therefore, even if the medicine tank 2 is tall, it is possible to hold the medicine tank 2 by distributing the load. Further, since anchor bolts are not used for fixing, a local stress concentration on the drug tank 2 does not occur.

  In particular, when the drug tank 2 is made of polyethylene, the drug tank 2 has a characteristic of expanding when the tank is full. By utilizing this characteristic, even when there is a gap in some abutting parts at the time of light load without liquid, even if there is a gap, the gap will be filled when the load is full and it is necessary to hold it securely. Thus, the medicine tank 2 can be held more securely. In addition, since the load is small when there is no liquid, it is sufficient that the liquid is held at a part of the contact portion.

  Further, since the contact portion 90 includes a placement portion 95 that is disposed below the step portion 70 and can place the step portion 70, the step portion 70 can be placed on the placement portion 95 of the contact portion 90. Therefore, the weight of the medicine tank 2 can be dispersed and supported by the support portion 80 and the contact portion 90.

  Further, since the front frame 20 has a pair of inner side surfaces F1 and F1 that can come into contact with the left and right side portions (contact portion f1) of the convex portion 71 of the drug tank 2, the drug tank 2 is mounted on the front frame 20. When placing, the medicine tank 2 can be easily positioned.

  The front frame 20 has a connection pin 27 that is a tractor mounting portion, the lower end portion of the rear frame 30 is fixed to the front frame 20, and the right curved bracket 41 and the left curved bracket 42 are respectively connected to the front frame 20 and Since it is connected to both the rear frame 30, the strength of fixing the rear frame 30 to the front frame 20 in the frame 10 attached to the tractor is improved.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. For example, the portion surrounded by the contact portion 90 is not limited to the stepped portion 70, and is not limited to the intermediate portion in the height direction of the medicine tank 2. Only the upper part of the medicine tank 2 may be surrounded and held by the contact part, or the lower part and the upper part of the medicine tank 2 may be surrounded and held by the contact part.

  The right curved bracket 41 may be attached to either the front frame 20 or the rear frame 30. The left curved bracket 42 may be attached to either the front frame 20 or the rear frame 30.

  The placement unit 95 is not limited to a planar shape. For example, when the contact portion 90 is a circular pipe, the placement portion may be linear.

  The contact portion 90 is not limited to the case where it extends so as to surround the front, rear, left and right four side surfaces of the medicine tank 2 and can contact the four side surfaces, and so as to surround at least either the front or rear side or the left and right sides. It may extend and be able to contact the two side surfaces. Even in this case, since the medicine tank 2 is fixed so as to be sandwiched in the front-rear direction or the left-right direction, the medicine tank 2 can be stably held. When a chemical solution is put into the medicine tank 2, the medicine tank 2 expands in the front-rear direction or the left-right direction, so that the holding effect by the contact portion 90 is enhanced.

  The boom sprayer 1 is not limited to a tractor-mounted type, and may be a self-propelled type.

  DESCRIPTION OF SYMBOLS 1 ... Boom sprayer (medicine spraying apparatus), 2 ... Chemical tank, 10 ... Frame, 20 ... Front side frame, 27 ... Connection pin (tractor mounting part), 30 ... Rear side frame, 40R ... Right side frame, 40L ... Left side frame, DESCRIPTION OF SYMBOLS 50 ... Press frame, 61 ... Front side, 62 ... Back side, 63 ... Right side, 64 ... Left side, 65 ... Lower side, 66 ... Upper side, 70 ... Step part, 80 ... Support part, 90 ... Contact part, 95 ... Mount Placement part, F1 ... inner side surface (front side contact part), X ... fixing structure (drug tank fixing structure).

Claims (6)

In the drug tank fixing structure (X) of the drug spraying device (1) in which the drug tank (2) is fixed to the frame (10),
The frame (10)
A support portion (80) on which the medicine tank (2) is placed and supports the medicine tank (2) from below;
A contact portion (90) extending so as to surround at least one of the front and rear sides and the left and right sides at a certain position in the height direction of the medicine tank (2) and capable of coming into contact with the two side surfaces; A drug tank fixing structure (X) of the drug spraying device (1), comprising:   The contact part (90) extends so as to surround the front, rear, left and right side surfaces at a certain position in the height direction of the medicine tank (2), and is capable of contacting the four side surfaces. The drug tank fixing structure (X) of the drug spraying device (1) according to claim 1. The medicine tank (2) has a stepped portion (70) whose upper side is large at an intermediate portion in the height direction,
The said contact part (90) is arrange | positioned under the said level | step-difference part (70), and includes the mounting part (95) which can mount the said level | step-difference part (70). The chemical tank fixing structure (X) of the chemical spraying device (1). The frame (10)
A front frame (20) facing the lower side (65) and the front side (61) of the medicine tank (2) and having the upper side and the rear side opened;
A rear frame (30) attached to the front frame (20) and facing the rear side (62) of the drug tank (2);
A right frame (40R) attached to the front frame (20) or the rear frame (30) and facing at least the right side (63) of the drug tank (2);
A left frame (40L) attached to the front frame (20) or the rear frame (30) and facing at least the left side (64) of the drug tank (2);
A pressing frame (50) attached to the front frame (20) or the rear frame (30) and pressing the medicine tank (2) from above is provided. The medicine tank fixing structure (X) of the medicine spraying device (1) described. The medicine tank (2) has a convex portion protruding forward in the middle portion in the left-right direction on the front side (61),
The said front side frame (20) has a pair of front side contact part (F1) which can contact | abut on the right and left side part of the said convex part, The chemical | medical agent spraying apparatus (1) of Claim 4 characterized by the above-mentioned. Drug tank fixing structure (X). The medicine spraying device (1) is a tractor-mounted type,
The front frame (20) has a tractor mounting part (27);
The lower end of the rear frame (30) is fixed to the front frame (20),
The right frame (40R) and the left frame (40L) are connected to both the front frame (20) and the rear frame (30), respectively. The chemical tank fixing structure (X) of the chemical spraying device (1).

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