JP4436433B1 - Spray spray blocking device for speed sprayer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the overall size and size and to avoid deterioration in appearance (shape) due to unnecessary exposure of a mechanism portion.
A spray blocking device 1 of a speed sprayer M including a cover moving unit 4 capable of selectively moving a blocking cover 3 to a blocking position Xs or an opening position Xr, and a displacement output unit 5e that is displaced in a straight traveling direction. A linear actuator portion 5 having one end portion 6d attached to the vehicle body 10 via the rotation support portion 11, and the other end portion 6u with respect to the shut-off cover 3 allowing only a vertical displacement. The displacement output part 5e of the linear actuator part 5 is coupled to the intermediate part 6m via the rotary coupling part 13 and the blocking cover 3 is supported so as to be displaceable in the front-rear direction. A cover moving unit 4 having a support mechanism unit 7 and a control unit 8 that drives and controls the linear actuator unit 5 is provided.
[Selection] Figure 1

Description

  The present invention relates to a spray blocker for a speed sprayer attached to a chemical spraying mechanism that sprays a chemical in a predetermined radial range including the right side, the left side, and the upper side.

  Conventionally, a speed sprayer disclosed in Patent Document 1 proposed by the present applicant has been known as a speed sprayer provided with a chemical spray mechanism for spraying a chemical in a predetermined range in the radial direction. The speed sprayer disclosed in the same document 1 has a main pipe for supplying a chemical solution to each of the left and right side surfaces of the vehicle body along the opening edge of the rectifying unit, and a plurality of movable branch pipes communicating with the main pipe are arranged on the axis. A nozzle that communicates with the main pipe is provided at each of the movable branch pipes at a predetermined distance from the center of the main pipe in the front-rear direction of the vehicle body. One end side of the link arm is fixed to the part, the other end side of the link arm of the adjacent movable branch pipe is linked by a link rod, and the axis is rotated by pushing the link rod and swinging the link arm. It is provided with a drive mechanism that rotates the movable branch pipe as the center of movement, so that it can be applied to the state of the spraying place such as the edge of a field with fruit trees on one side, the growing state (height state) of fruit trees, or sloping ground. The injection direction of chemicals can be changed accordingly Rukoto can.

  However, this speed sprayer (chemical spray mechanism) cannot reliably prevent chemical spraying in the direction in which chemical spraying is to be avoided even if the spray direction of the chemical liquid can be changed. There was a problem that could not be avoided sufficiently. For this reason, the present applicant has already proposed a chemical spraying device for a speed sprayer that solves this problem. The chemical spraying device disclosed in the same document 2 includes a chemical spraying mechanism capable of spraying a chemical in a predetermined range in the radial direction including the right side, the left side, and the upper side, and a partial range in the predetermined range. A blocking cover that regulates spraying, and a cover moving means that can selectively move the blocking cover to a blocking position that blocks the partial range or an open position that releases the blocking, Part of the predetermined range can be blocked by the blocking member to restrict the spraying of the chemical solution.

JP 2000-004760 A JP 2008-100170 A

  However, the conventional chemical spraying device provided in the above-described speed sprayer also has the following problems to be solved.

  First, since the cover moving means for moving the blocking cover to the blocking position for blocking a partial range of the chemical solution spray range or the open position for releasing the blocking is provided, when the cover moving means is configured, It is necessary to secure a stroke range to be moved to the blocking position and the opening position. Therefore, when a linear type actuator is used as the power, the occupied space in the front-rear direction in the limited arrangement area of the cover moving means is widened, the entire cover moving means is enlarged, and the mechanism part is exposed. The appearance (shape) will be reduced due to the above.

  Secondly, in order to make the stroke range of the actuator as short as possible, a link mechanism that amplifies the displacement of the displacement output portion of the actuator and transmits it to the blocking cover is used. For example, when a tree or the like to which a chemical solution is applied hits, the tree or the like is easily caught in the link mechanism, and the tree or the like is easily damaged or the cover moving means is likely to be damaged.

  An object of the present invention is to provide a spray blocker for a speed sprayer that solves the problems existing in the background art.

  In order to solve the above-mentioned problems, the present invention is attached to the chemical spray mechanism 2 capable of spraying a chemical solution in a predetermined range in the radial direction including the right side, the left side, and the upper side, and blocks a partial range An in the predetermined range. And a cover moving means 4 capable of selectively moving the blocking cover 3 to a blocking position Xs for blocking a partial range An or an opening position Xr for releasing the blocking. When configuring the spray blocking device 1 of the speed sprayer M, the linear actuator portion 5 having the displacement output portion 5e that is displaced in the straight direction, the one end portion 6d is attached to the vehicle body 10 side via the rotation support portion 11, and the other The end portion 6u is engaged with the blocking cover 3 via a lever engaging portion 12 that allows only vertical displacement, and the displacement output portion 5e of the linear actuator portion 5 is connected to the intermediate portion 6m. Cover movement having a link lever portion 6 coupled via a rotational coupling portion 13, a support mechanism portion 7 that supports the blocking cover 3 so as to be displaceable in the front-rear direction, and a control portion 8 that drives and controls the linear actuator portion 5. Means 4 is provided.

  In this case, according to a preferred aspect of the invention, the lever engaging portion 12 includes a roller portion 21 that is rotatably provided at the other end portion 6u of the link lever portion 6, and a roller portion that is provided and engaged with the blocking cover 3. The rail part 22 which guides 21 to an up-down direction can comprise. When the rail portion 22 is provided, a separate rail member 22p may be attached to the blocking cover 3, or may be integrally formed with the blocking cover 3. Further, it is desirable that the link lever portion 6 is curved in an arc shape. On the other hand, the rotation coupling portion 13 can be disposed closer to the rotation support portion 11 than the center position of the link lever portion 6, and the lever engagement portion 12 is disposed at an intermediate position in the vertical direction of the blocking cover 3. can do. On the other hand, when the blocking cover 3 moves to the blocking position Xs side, the spray blocking device 1 stops the supply of the chemical solution sprayed to the partial range An, and when the blocking cover 3 moves to the opening position Xr side. It is desirable to provide chemical solution supply interlocking means 23 for canceling the supply stop.

  The spray spray blocking device 1 of the speed sprayer M according to the present invention having such a configuration has the following remarkable effects.

  (1) A lever engaging portion 12 having one end 6d attached to the cover moving means 4 on the side of the vehicle body 10 by the rotation support portion 11 and the other end 6u being only allowed to be displaced in the vertical direction with respect to the blocking cover 3. Since the displacement output portion 5e of the linear actuator portion 5 is coupled to the intermediate portion 6m by the rotation coupling portion 13, the link lever portion 6 is coupled to the intermediate portion 6m. The space occupied by the moving means 4 in the front-and-rear direction in a particularly limited arrangement area can be effectively reduced, the overall size of the cover moving means 4 can be reduced, and the appearance (shape) of the mechanism portion can be unnecessarily exposed. Can be avoided.

  (2) According to a preferred embodiment, the lever engaging portion 12 is provided with a roller portion 21 that is rotatably provided at the other end portion 6u of the link lever portion 6, and a roller portion 21 that is provided and engaged with the blocking cover 3. When the rail portion 22 is guided in the vertical direction, the relative displacement in the vertical direction generated in the other end portion 6u of the link lever portion 6 can be smoothly allowed to ensure a reliable engagement function and operation.

  (3) If the rail portion 22 is configured by attaching a separate rail member 22p to the blocking cover 3 according to a preferred aspect, the shape (design) design freedom of the blocking cover 3 can be increased.

  (4) If the rail portion 22 is formed integrally with the blocking cover 3 according to a preferred embodiment, a separate rail member becomes unnecessary, which can contribute to cost reduction by reducing the number of parts and the number of assembly steps.

  (5) If the link lever portion 6 is curved in an arc shape according to a preferred embodiment, all or most of the link lever portion 6 can be accommodated inside the blocking cover 3. Thereby, even when a tree or the like to which the chemical solution is sprayed hits, there is no possibility of the tree or the like being caught by the link lever portion 6, so that the tree is damaged or a failure or the like occurs in the cover moving means 4. Can be avoided. In addition, since the mechanism portions such as the link lever portion 6 and the rotation coupling portion 13 can be protected by shielding the blocking cover 3, the blocking cover 3 can also function as a protective cover.

  (6) According to a preferred embodiment, the rotation coupling portion 13 is disposed closer to the rotation support portion 11 than the center position of the link lever portion 6, and the lever engagement portion 12 is arranged in the middle in the vertical direction of the blocking cover 3. If it arrange | positions to a position, the bigger performance can be acquired from a viewpoint which implement | achieves small size reduction with respect to the cover moving means 4, and a viewpoint which ensures smooth operation | movement.

  (7) According to a preferred embodiment, supply of the chemical solution sprayed to the partial range An when the blocking cover 3 moves to the blocking position Xs side is stopped by the spray blocking device 1, and the blocking cover 3 is on the open position Xr side If the chemical supply interlocking means 23 that cancels the supply stop when moving to is provided, it is possible to reliably prevent the chemical from splashing in the direction in which it is desired to avoid the chemical spraying in private houses and pesticide-free cultivation fields. It is possible to simplify the operation when stopping (or canceling) the spraying to An and further improve the work efficiency.

FIG. 5 is a right side configuration diagram showing a part of a speed sprayer in which a blocking cover that is partially broken in the spray blocking device according to a preferred embodiment of the present invention is in a blocking position; Operation explanatory diagram showing the main part of the spray blocking device extracted, An external perspective view of a blocking cover in the spray blocking device, The right side block diagram which shows a part of speed sprayer in which the interruption | blocking cover in the spray interruption | blocking apparatus is in an open position, Rear view of a speed sprayer provided with the spray blocking device, The plane block diagram of the principal part including the cross section of the shielding cover in the spray shielding device, The plane block diagram of the principal part containing the cross section of the interruption | blocking cover which shows the example of a change of the lever engaging part in the spray interruption | blocking apparatus, Overall configuration diagram of right side surface of speed sprayer provided with same spray blocking device,

  Next, preferred embodiments according to the present invention will be given and described in detail with reference to the drawings.

  First, in order to facilitate understanding of the present invention, a schematic configuration of a speed sprayer M including the spray blocking device 1 according to the present embodiment will be described with reference to FIG.

  In the speed sprayer M, reference numeral 30 denotes a chassis. The chassis 30 includes a pair of left and right front wheels 31 on the front side, and a pair of left and right rear wheels 32 on the rear side. In addition, the body 33 on the chassis 30 includes a driver's seat 34 in the front, and the front panel 35 in front of the driver's seat 34 includes necessary vehicle equipment such as a lighting device such as a headlight and a rearview mirror. . Further, behind the driver's seat 34, a chemical tank 36 and a machine room such as an engine room are mounted, and a chemical spray mechanism 2 to which the spray blocking device 1 according to the present embodiment is attached is provided behind this.

  The chemical spray mechanism 2 includes a blower 43 having a blower 42 (FIG. 5) covered with a wind tunnel 41, and an injection space S is provided between the blower 43 and the chemical tank 36. Note that the wind tunnel 41 constitutes a part of the vehicle body 10. Further, in the injection space S, a rectifying cylinder 44 and a large number of injection nozzles N arranged along the rectifying cylinder 44 are arranged. In this case, as shown in FIG. 5, each injection nozzle N ... is branched from nozzle units 45p, 45m, 45q for spraying in three directions, and the chemical liquid injected from each injection nozzle N ... The air is blown from the spray space S to a predetermined range in the radial direction by the air blown from the blower unit 43. At this time, the spraying nozzles N ... of the nozzle unit 45p arranged on the right side are sprayed rightward to become a partial range An of the predetermined range. Similarly, the spray nozzle N of the nozzle unit 45q arranged on the left is sprayed to the left, which is a partial range of the predetermined range, and the predetermined spray from the spray nozzle N of the nozzle unit 45m arranged on the upper side. It sprays on the upper part which becomes a partial range of a range. In addition, the upper nozzle unit 45m illustrated further includes two nozzle units combined.

  Next, the configuration of the spray blocking apparatus 1 according to the present embodiment will be specifically described with reference to FIGS.

  The spray blocking device 1 includes a blocking cover 3 that is attached to the injection space S to block a partial range An in a predetermined range in which the chemical liquid is sprayed and restrict the spray of the chemical liquid. The illustrated blocking cover 3 is formed in a shape that can be regulated with respect to the partial range An in order to regulate spraying to the right of the speed sprayer M as the partial range An. That is, a single strip-shaped panel material is formed around the ejection space S and integrally formed in a shape capable of shielding the periphery. FIG. 3 shows the overall shape of the blocking cover 3. In this case, since the wind pressure in the radial direction from the injection space S reaches a considerable size, the cover main body 3m parallel to the side surface of the speed sprayer M is designed to withstand this wind pressure sufficiently. A plurality of rib portions 3s... Formed by unevenness also serving as a shape is formed to increase rigidity. Further, in order to prevent leakage spraying forward (to the driver's seat 34 side), the front shielding portion 3f is integrally formed from the front end of the cover main body portion 3m toward the inside. Such a blocking cover 3 can be easily manufactured from a plastic material, a metal material, or the like, and can be implemented at low cost.

  Further, the spray blocking device 1 includes a cover moving means 4 that can selectively move the blocking cover 3 to a blocking position Xs that blocks a partial range An or an open position Xr that releases the blocking. The cover moving means 4 includes a linear actuator portion 5 having a displacement output portion 5e that is displaced in the straight direction, one end portion 6d attached to the vehicle body 10 side via the rotation support portion 11, and the other end portion 6u attached to the blocking cover 3. The lever is engaged through a lever engaging portion 12 that allows only vertical displacement, and the displacement output portion 5e of the linear actuator portion 5 is coupled to the intermediate portion 6m via the rotation coupling portion 13. A support mechanism unit 7 that supports the block cover 3 so as to be displaceable in the front-rear direction, and a control unit 8 that drives and controls the linear actuator unit 5.

  In this case, as shown in FIGS. 1 and 5, a support plate 51 is attached to the outer surface of the wind tunnel 41. As shown in FIG. 1, the support plate 51 is formed in a rectangular shape as a whole, and an upper guide rail portion 52u is provided on the upper end side, and a lower guide rail portion 52d is provided on the lower end side. The guide rail portions 52u and 52d are parallel to each other, and slider portions 53u and 53d provided at the upper and lower positions on the inner surface of the blocking cover 3 are slidably loaded on the guide rail portions 52u and 52d, respectively. The guide rail portions 52u and 52d and the slider portions 53u and 53d can be constituted by linear bearings, and the support plate 51, the guide rail portions 52u and 52d, and the slider portions 53u and 53d can displace the blocking cover 3 in the front-rear direction. The supporting mechanism part 7 to support is comprised. As a result, when the blocking cover 3 is moved in the forward direction, the blocking cover 3 can be positioned at the blocking position Xs that blocks the partial range An described above. Can be positioned at the open position Xr for releasing.

  On the other hand, the linear actuator part 5 and the link lever part 6 are disposed on the support plate 51. In this case, an electric drive type is used for the linear actuator unit 5. The linear actuator unit 5 includes an actuator body 5m and a drive rod (armature) 5d protruding from the tip of the actuator body 5m. Therefore, the front end portion of the drive rod 5d is a displacement output portion 5e that is displaced in the straight direction. Then, the rear end portion of the actuator body 5 m is rotatably attached to the vicinity of the rear end of the support plate 51 at the intermediate position in the vertical direction via the rotation attachment portion 56.

  The link lever portion 6 is curved in an arc shape and is disposed in front of the linear actuator portion 5. The link lever portion 6 is long in the vertical direction, and is curved so that the intermediate portion is positioned forward. And the lower end part (one end part) 6d of the link lever part 6 is attached to the vicinity of the lower end in the position near the front of the support plate 51 via the rotation support part 11 so as to be rotatable. On the other hand, the upper end portion (the other end portion) 6u of the link lever portion 6 is engaged with the inner surface of the blocking cover 3 via a lever engaging portion 12 that can only allow a vertical displacement. At this time, as the position of the lever engaging portion 12, an intermediate position in the vertical direction of the blocking cover 3 is selected. The lever engaging portion 12 is configured by a roller portion 21 provided rotatably at the other end portion 6 u of the link lever portion 6 and a rail portion 22 provided on the inner surface of the blocking cover 3. In this case, as shown in FIG. 6, the rail portion 22 is provided with a separately formed channel-shaped rail member 22p having a U-shaped cross section, and the rail member 22p is attached to the inner surface of the blocking cover 3 by screwing or the like. Constitute. Thereby, the roller part 21 engages with the rail part 22 and is guided in the vertical direction. Thus, if the lever engaging portion 12 is constituted by the roller portion 21 provided at the other end portion 6u and the rail portion 22 provided at the blocking cover 3, the vertical direction generated at the other end portion 6u of the link lever portion 6 is determined. Relative displacement can be allowed smoothly and a reliable engagement function and operation can be ensured. In particular, if the rail portion 22 is configured by attaching a separate rail member 22p to the blocking cover 3, the shape of the blocking cover 3 ( There is an advantage that the degree of design freedom can be increased.

  Further, a displacement output portion 5 e in the linear actuator portion 5 is rotatably coupled to the intermediate portion 6 m of the link lever portion 6 via a rotational coupling portion 13. In this case, the rotation coupling unit 13 selects a position closer to the rotation support unit 11 than the center position of the link lever unit 6. As described above, the rotation coupling portion 13 is disposed closer to the rotation support portion 11 than the center position of the link lever portion 6, and the lever engagement portion 12 described above is disposed at the center position in the vertical direction of the blocking cover 3. If arranged, greater performance can be obtained from the viewpoint of realizing a compact and compact cover moving means 4 and ensuring smooth operation. In addition, since the link lever portion 6 is curved and formed in an arc shape, all or most of the link lever portion 6 can be accommodated inside the blocking cover 3. Therefore, even when a tree or the like to which the chemical solution is sprayed is hit, there is no risk of the tree being caught by the link lever portion 6, thereby avoiding damage to the tree or failure of the cover moving means 4. it can. In addition, since the mechanism portions such as the link lever portion 6 and the rotation coupling portion 13 can be protected by shielding the blocking cover 3, the blocking cover 3 can also function as a protective cover.

  On the other hand, a cover position detector 61 is disposed near the rear end of the upper portion of the support plate 51. For the cover position detection unit 61, for example, a non-contact type detection switch (non-contact type detection unit) that can perform magnetic detection can be used. Therefore, a detected element detected by this detection switch is disposed at a predetermined position of the blocking cover 3. As a result, when the blocking cover 3 moves to the open position Xr, the cover position detection unit 61 is turned OFF, and when the blocking cover 3 is separated from the opening position Xr, the cover position detection unit 61 is turned ON. If such a non-contact type detection switch is used, even if the cover position detection unit 61 is disposed in a place exposed to an adverse condition, a detection failure due to a contact failure or the like can be avoided and reliable even in long-term use. There is an advantage that can maintain the detection.

  As shown in FIG. 1, the cover position detection unit 61 and the linear actuator unit 5 are connected to an in-vehicle controller 62 that constitutes a main part of the control unit 8. A cover switch 63 is connected to the in-vehicle controller 62. The cover switch 63 is disposed on the dashboard 34d (FIG. 8) of the driver's seat 34 so that the driver (operator) can easily operate. Reference numeral 64 denotes a battery connected to the in-vehicle controller 62. Thereby, the blocking cover 3 can be automatically moved only by operating the cover switch 63 in the driver's seat 34.

  On the other hand, when the blocking cover 3 moves to the blocking position Xs side, the spray blocking device 1 stops the supply of the chemical solution sprayed to the partial range An, and when the blocking cover 3 moves to the opening position Xr side. A chemical supply interlocking means 23 for canceling the supply stop is provided. This chemical solution supply interlocking means 23 is connected to a chemical solution supply pipe 71 for spraying in a partial range An in addition to the above-described cover position detection unit 61 and on-vehicle controller 62 that detect that the blocking cover 3 is in the open position Xr. An open / close valve (electromagnetic valve) 65 can be used. Therefore, the open / close valve 65 is also connected to the in-vehicle controller 62. One end side of the supply pipe 71 is connected to a nozzle unit 45p having spray nozzles N for spraying a chemical solution in a partial range An, and the other end side is connected to a chemical pump side (not shown).

  Such chemical solution supply interlocking means 23, that is, a cover position detecting unit 61 for detecting that the blocking cover 3 is at least in the open position Xr, and an open / close valve 65 connected to a supply pipe 71 for chemical solution sprayed in a partial range An. If the chemical supply interlocking means 23 that switches the open / close valve 65 to the open side when the cover position detection unit 61 detects the open position Xr and switches the open / close valve 65 to the close side when the open position Xr is not detected is used, The chemical solution is supplied when the cover 3 is completely opened, and the supply of the chemical solution is stopped when the cover 3 starts to close, so that it is possible to reliably avoid the problem that the chemical solution is scattered while the cover 3 is being opened or closed. There are advantages you can do. Moreover, in addition to being able to reliably prevent chemical spraying in the direction where it is desired to avoid spraying chemicals in private homes and pesticide-free farming fields, etc., simplification of the operation when spraying is stopped (or canceled) for a partial range An. Furthermore, the work efficiency can be improved.

  Next, the operation of the spray blocking device 1 according to the present embodiment and the chemical spray mechanism 2 provided with the spray blocking device 1 will be described with reference to FIGS.

  First, the opening and closing of the blocking cover 3, that is, the movement to the blocking position Xs or the opening position Xr can be performed by operating the cover switch 63 in the driver's seat 34. Now, it is assumed that the driver (operator) operates the cover switch 63 to the closed side (blocking position Xs side). Before the cover switch 63 is operated to the closed side, the blocking cover 3 is on the open side (open position Xr side) and the open / close valve 65 is on the open side, so that normal spraying is possible, that is, FIG. It is in the state shown in

  When the driver (operator) operates the cover switch 63 to the closed side (the cutoff position Xs side), the in-vehicle controller 62 controls the linear actuator unit 5 in the direction in which the drive rod 5d is projected. As a result, the displacement output portion 5e is displaced in the projecting direction, and the link lever portion 6 is pivotally displaced clockwise with the rotation support portion 11 as a fulcrum, and the upper end portion 6u of the link lever portion 6 is moved forward ( Displacement to the cutoff position Xs side). Therefore, the blocking cover 3 engaged with the upper end portion 6u of the link lever portion 6 via the lever engaging portion 12 also moves toward the blocking position Xs. When the drive rod 5d reaches the protruding end and the blocking cover 3 reaches the blocking position Xs, it is detected by a predetermined detection means, and the in-vehicle controller 62 controls the linear actuator unit 5 to stop. On the other hand, when the blocking cover 3 starts to move from the open position Xr to the blocking position Xs, the cover position detection unit 61 is switched from OFF to ON. Thereby, the vehicle-mounted controller 62 switches the opening / closing valve 65 to the closed side. That is, the opening / closing valve 65 is automatically switched to the closing side in conjunction with the movement of the blocking cover 3 to the blocking position Xs.

  As a result, the blocking cover 3 is set at the blocking position Xs shown in FIG. 1, and the open / close valve 65 is switched to the closed side, and the supply of the chemical liquid is stopped. Thereby, even if the chemical liquid is sprayed, the right side of the speed sprayer M is blocked by the blocking cover 3, and the spraying of the chemical liquid on the partial range An is restricted. Therefore, for example, it is possible to reliably prevent the chemical solution from being scattered in a direction in which it is desired to avoid the spraying of the chemical solution in a private house or an agrochemical-free field. At this time, if the cover switch 63 is operated during spraying, the detection switch 61 is turned on immediately after the blocking cover 3 starts moving from the open position Xr, that is, when the blocking cover 3 starts to close. The spraying of the chemical liquid can be stopped, and the problem that the chemical liquid scatters while the blocking cover 3 is being closed can be reliably avoided.

  On the other hand, it is assumed that the blocking cover 3 is moved from this state to the open position Xr and returned to a state where normal spraying is performed. In this case, if the driver (operator) operates the cover switch 63 to the open side (open position Xr side), the in-vehicle controller 62 controls the linear actuator unit 5 in the direction in which the drive rod 5d is retracted. As a result, the drive rod 5d is displaced in the retracting direction, and by this displacement, the link lever portion 6 is pivotally displaced counterclockwise with the rotation support portion 11 as a fulcrum, and the upper end portion 6u of the link lever portion 6 is rearward ( Displacement to the open position Xr side). Therefore, the blocking cover 3 that engages with the upper end portion 6u of the link lever portion 6 via the lever engaging portion 12 also moves toward the open position Xr. When the drive rod 5d reaches the retracted end and the blocking cover 3 reaches the open position Xr, it is detected by a predetermined detection means, and the in-vehicle controller 62 controls the linear actuator unit 5 to stop. On the other hand, when the blocking cover 3 reaches the blocking position Xs, the cover position detection unit 61 is switched from ON to OFF. Thereby, the vehicle-mounted controller 62 switches the open / close valve 65 to the open side. That is, the open / close valve 65 is automatically switched to the open side in conjunction with the blocking cover 3 reaching the open position Xr.

  Thereby, since the interruption | blocking cover 3 is set to the open position Xr shown in FIG. 4, normal chemical | medical solution dispersion | distribution which is not controlled by the interruption | blocking cover 3 can be performed. That is, the injection space S is not blocked by the blocking cover 3, but the entire range that is a predetermined range is opened, and normal chemical solution spraying is performed. At this time, if the cover switch 63 is operated in the middle of spraying, the detection switch 61 is turned off in a state where the blocking cover 3 is almost completely opened to the open position Xr, so that the chemical solution is scattered while the blocking cover 3 is being opened. It is possible to reliably avoid problems that occur.

  Therefore, according to the spray blocking device 1 according to the present embodiment, the cover moving means 4 is attached to the vehicle body 10 side with the one end portion 6d by the rotation support portion 11, and the other end portion 6u to the blocking cover 3. On the other hand, the lever engaging portion 12 that allows only the displacement in the vertical direction is engaged, and the link lever portion 6 in which the displacement output portion 5e of the linear actuator portion 5 is coupled to the intermediate portion 6m by the rotation coupling portion 13 is used. Even when the linear actuator unit 5 is used as the power, the occupied space in the front-rear direction in the limited movement area of the cover moving unit 4 can be effectively reduced, and the entire size of the cover moving unit 4 can be reduced. It is possible to avoid a reduction in appearance (shape) due to downsizing and unnecessary exposure of the mechanism portion.

  Although the preferred embodiment has been described in detail above, the present invention is not limited to such an embodiment, and the detailed configuration, shape, material, quantity, technique, and the like do not depart from the gist of the present invention. It can be changed, added, or deleted arbitrarily.

  For example, although the rail part 22 which comprises the lever engaging part 12 illustrated the case where it attached and comprised the separate rail member 22p to the interruption | blocking cover 3, as an example of a change of the lever engaging part 12, it shows in FIG. As described above, the rail portion 22 can be integrally formed with the blocking cover 3. Thus, if the rail part 22 is integrally formed in the interruption | blocking cover 3, since a separate rail member becomes unnecessary, there exists an advantage which can contribute to the cost reduction by reduction of a number of parts and an assembly man-hour. In the embodiment, the one end portion 6 d of the link lever portion 6 and the support plate 51 are coupled by the rotation support portion 11, and the other end portion 6 u of the link lever portion 6 and the blocking cover 3 are engaged by the lever engagement portion 12. In this case, the other end portion 6u of the link lever portion 6 and the blocking cover 3 are connected by the rotation support portion 11, and the one end portion 6d of the link lever portion 6 and the support plate 51 are connected by the lever engagement portion 12. Such modifications may be included in the scope of the present invention. Similarly, in the embodiment, the case where the rear end of the linear actuator portion 5 is rotatably attached by the rotation attachment portion 56 and the displacement output portion 5e is coupled to the link lever portion 6 by the rotation coupling portion 13 is shown. However, the position of the linear actuator unit 5 may be completely fixed, and the coupling position of the displacement output unit 5e in the rotation coupling unit 13 may be coupled so as to be relatively displaced within a certain range. Furthermore, although the linear actuator part 5 illustrated the electric drive type, the actuator using other motive powers, such as an air drive type and a hydraulic drive type, may be sufficient. On the other hand, the blocking cover 3 is attached to the right side of the speed sprayer M to block a partial range An on the right side. However, the blocking cover 3 is attached to the left side of the speed sprayer M to set a partial range on the left side. You may make it interrupt | block, and the structure in this case can be implemented fundamentally like the right side except the point which becomes left-right symmetric.

  INDUSTRIAL APPLICABILITY The spray blocking device according to the present invention can be used for various speed sprayers including a chemical spray mechanism that sprays a chemical in a predetermined range in the radial direction. The speed sprayer according to the present invention includes various vehicles for spraying a chemical solution, and includes, for example, a four-wheel truck or a tractor equipped with a chemical solution spraying device on a carrier.

  1: spray blocking device, 2: chemical spray mechanism, 3: blocking cover, 4: cover moving means, 5: linear actuator section, 5e: displacement output section, 6d: one end of link lever section, 6m: link lever section Intermediate part, 6u: the other end part of the link lever part, 7: support mechanism part, 8: control part, 10: vehicle body, 11: rotation support part, 12: lever engagement part, 13: rotation coupling part, 21 : Roller part, 22: Rail part, 22p: Rail member, 23: Chemical solution supply interlocking means, An: Partial range in a predetermined range, Xs: Blocking position, Xr: Opening position, M: Speed sprayer

Claims (6)

  A blocking cover that is attached to a chemical spraying mechanism capable of spraying a chemical solution in a predetermined range in the radial direction including the right side, the left side, and the upper side, blocks a partial range in the predetermined range, and regulates the spray of the chemical solution, In a spray spraying device for a speed sprayer, comprising a cover moving means capable of selectively moving the cover to a blocking position for blocking the partial range or an opening position for releasing the blocking, the cover has a displacement output section that is displaced in the straight direction The linear actuator portion and one end portion are attached to the vehicle body side via a rotation support portion, and the other end portion is engaged with the blocking cover via a lever engaging portion that allows only vertical displacement. A link lever part in which the displacement output part of the linear actuator part is coupled to the intermediate part via a rotation coupling part, and a support mechanism for supporting the blocking cover so as to be displaceable in the front-rear direction. When spray breaker of speed sprayer, characterized in that it comprises a cover moving means comprising a control unit for driving and controlling the linear actuator unit.   The lever engaging portion includes a roller portion that is rotatably provided at the other end portion of the link lever portion, and a rail portion that is provided on the blocking cover and guides the engaging roller portion in the vertical direction. The spray blocker for a speed sprayer according to claim 1.   3. The spray blocker for a speed sprayer according to claim 2, wherein the rail part is provided by attaching a separate rail member to the blocking cover or integrally formed with the blocking cover.   The spray blocker for a speed sprayer according to claim 1, wherein the link lever portion is curved in an arc shape.   The pivot coupling portion is disposed closer to the pivot support portion than the center position of the link lever portion, and the lever engaging portion is disposed at an intermediate position in the vertical direction of the blocking cover. The spray blocker for a speed sprayer according to claim 1 or 4.   A chemical solution supply that stops supply of the chemical solution sprayed to the partial range when the blocking cover moves to the blocking position side and releases the supply stop when the blocking cover moves to the open position side. The spray blocker for a speed sprayer according to claim 1, further comprising interlocking means.

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