JP3472639B2 - Chemical pump control device in soil disinfection machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil disinfecting machine for injecting a chemical solution into the ground to kill insects and fungi harmful to crops. The present invention relates to a soil disinfecting machine of the type in which the surface is covered with a film simultaneously with disinfecting the soil for the purpose of enhancing the effect. 2. Description of the Related Art Chemical solutions used in soil disinfection machines are highly toxic and must be sprayed according to a prescribed usage. The amount of spray is adjusted by controlling a pump. When the pump is intermittently driven and sprayed in a point-like manner, the pump can be uniformly sprayed without excess or shortage by driving the pump in proportion to the traveling distance of the soil disinfecting machine. [0004] For this purpose, there has been conventionally proposed a system in which the running distance is detected from the number of revolutions of a ground contact wheel of a soil disinfecting machine, and a chemical solution delivery pump is intermittently driven based on the detection result (Japanese Patent Laid-Open No. 4-4835). Gazette). However, since the field scene is not flat but has irregularities, it is impossible to accurately detect the traveling distance of the airframe with such a ground wheel rolling on the ground surface. Therefore, it could not be said that the purpose of uniformly dispersing the chemical solution without excess or shortage was also achieved. For this reason, conventionally, there has been a problem that the crop is contaminated by excessively using the chemical solution, and that the consumption of the chemical solution is increased wastefully and the cost is increased. Therefore, the present invention solves these problems,
An object of the present invention is to intermittently drive a pump in proportion to a traveling distance of an airframe to uniformly and uniformly spray a chemical solution. According to the present invention, a pump is driven to supply a chemical solution in a tank to an injection knife, and a chemical solution is injected into the ground from the tip of the injection knife, and is attached to the rear of the injection knife. In a soil disinfecting machine that covers the ground surface after injecting a chemical solution with a film by a film covering device, a rotating roller that contacts the film and rotates according to the feeding amount is provided, and the pump is intermittently driven by the number of rotations of the rotating roller. It is characterized by comprising a pump driving means. According to the above construction, since the amount of film feeding coincides with the travel distance of the soil disinfecting machine, the pump driving means intermittently operates the pump based on the predetermined number of rotations of the rotating roller corresponding to the amount of film feeding. When driven, the medicinal solution is injected into the field at predetermined intervals. [0010] Thus, even on a ground surface having irregularities, it is possible to inject a chemical solution at a predetermined interval accurately corresponding to the traveling distance of the soil disinfecting machine. An embodiment of a soil disinfecting machine 10 according to the present invention will be described below with reference to the drawings. FIG. 1 is an overall side view of the soil sterilizer 10, and FIG. 2 is a plan view of a film covering device. The soil disinfecting machine 10 has a structure in which a film covering device 12 is connected to a front portion of a walking tractor 11, and reference numeral 13 denotes a disinfecting device 13. In the film covering device 12, a T-shaped vertical main rod 14 is disposed in the center of the fuselage in plan view in the front-rear direction of the fuselage. A pair of connecting rod portions 15 is provided. A roll support frame 16 is connected to the connecting rod portions 15, 15, and bearings 17, 17 are provided on the roll support frame 16. A film roll 19 for winding a film 18 between the bearings 17 is supported. A vertical rod 21 is mounted on the roll support frame 16.
And a rotating roller supporting rod 22 having an L-shape in side view is vertically swingably connected to the vertical rod 21. Then, the rotating roller shaft 23 is fixed to the tip of the rotating roller supporting rod 22, and the rotating roller 24 is fixed to the rotating roller shaft 23. A motor drive start cam 25 that rotates integrally with the rotation roller 24.
Is fixed to the rotating roller shaft 23, and the motor driving start cam 2
5, a start microswitch 26 is also provided (see FIG. 3). A tension roller support rod 27 is attached to the vertical main rod 14.
And a tension roller support member 28 is fixed to the tension roller support rod 27. The tension roller 29 is attached to the tension roller support member 28. Further, the connecting rod 30 provided at the rear end of the vertical main rod 14 is
Connect to 1. A horizontal frame 31 is fixed at right angles to the vertical main rod 14,
A pair of side frames 32, 3 curved upward from both ends of the horizontal frame 31
2 is provided. Further, groove cutting plates 33, 33 are vertically provided downward from both ends of the horizontal frame 31. Film tread wheels 34, 34 slightly narrower than the width of the film 18, a soiling disk 35 slightly wider than the width of the film roll 19, and tape pressing wheels 36, 36 disposed inside the soiling disk 35; Suppression tail wheel 37,
37 are attached to the side frames 32, 32. A running wheel 38 and a tilling rotor 39 are mounted on the left and right sides of the walking tractor 11. The structure of the disinfection device 13 is as follows. First, a chemical solution tank 41 is disposed on a fixed frame 40 of the walking type tractor 11, and the chemical solution tank 41 is connected to a pump 43 via a suction tube 42. It is installed inside the body part 44. The pump 43 has a drive shaft of a motor (not shown)
5 and a pump driving cam 46 is connected to a pump driving shaft 45.
And the pump stop cam 47 is fixed. Cam 4 for pump drive
A pressing member 48 interlocking with 6 is provided, and the pressing member 48 is connected to the pump 43. A stop microswitch 49 is provided adjacent to the pump stop cam 47 (see FIG. 4). Then, the discharge tube 50 is connected to the pump 43, and the discharge tube 50 is connected to an injection knife 51 vertically hanging down on the vertical main rod 14. Next, the operation of this embodiment will be described. Progress of the soil disinfecting machine 10 (in the direction of the arrow in FIG. 1)
Accordingly, grooves are formed on the left and right sides of the film covering device 12 by the groove cutting plates 33, 33. At the same time, the film pressing wheel 34 presses the left and right side edges of the film 18 into the grooves, and the film 18 is sequentially pulled out from the film roll 19 while being pulled by the tension roller 29. At this time, when the film roll 19 rotates, the rotating roller 24 rotates in conjunction therewith, and the amount of film 18 fed corresponds to the number of rotations of the rotating roller 24.
The interval for injecting the chemical is determined from the number of rotations of the rotation roller 24. The cam 25 for starting the motor drive corresponding to the predetermined number of rotations of the rotating roller 24
Insert 6 intermittently. Then, the motor is rotated by the signal of the start micro switch 26 to rotate the pump drive shaft 45. At the same time, the pump driving cam 46 rotates to operate the pressing member 48 to drive the pump 43.
Then, when the pump 43 is driven, the chemical liquid sucked from the chemical liquid tank 41 is supplied from the pump 43 to the injection knife 51 via the discharge tube 50, and the chemical liquid is injected from the injection knife 51 into the soil. Then, the film 18 covering the soil surface into which the chemical solution has been injected is stepped on by the film stepping wheel 34, and the left and right side edges of the stepped-down film 18 are laid by the soiling discs 35 to lay the film 18. Further, the rotation of the motor rotates the cam 46 for driving the pump, and the pressing member 48 moves in contact with the cam 46 for driving the pump to suck the chemical from the chemical tank 41. Further, the pump stop cam 45 rotates and the pump 43 is stopped by the stop micro switch 47. Then, as the soil disinfecting machine 10 runs, the film is sequentially unwound from the film roll 19, and the motor is rotated to repeat the pouring operation. When the soil disinfecting machine 10 is turned upside down on a ridge in a field, the rotating roller 24 is pulled through a wire (not shown) to separate the rotating roller 24 from the film roll 19. As a result, even when the film is fed, the chemical is not injected from the injection knife 51, and the chemical does not spread in the air. In a similar case, an electric circuit for preventing driving of the pump may be formed. As described above, when soil is disinfected by the soil disinfecting machine 10 of the present embodiment, the predetermined rotation of the rotating roller 24 corresponding to the film feeding amount that is accurately proportional to the running distance even when the field scene has irregularities. The chemical can be injected into the soil at predetermined intervals by intermittently driving the pump based on the number. As described above, according to the present invention, the pump drive means can properly and intermittently drive the pump at a predetermined interval with a predetermined feeding amount from the film roll, so that the drug solution can be injected into the field at a predetermined interval. .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall side view of a soil sterilizer. FIG. 2 is a plan view of a film coater showing an embodiment of the present invention. FIG. 3 is a diagram showing an arrangement of a rotating roll, a motor drive start cam, and a start microswitch. FIG. 4 is a view showing a pump, a pump driving cam, a pump stop cam, and a stop micro switch. DESCRIPTION OF SYMBOLS 10 Soil disinfecting machine 12 Film covering device 13 Soil disinfecting machine 16 Roll support frame 19 Film roll 24 Rotary roller 25 Motor drive start cam 26 Start micro switch 43 Pump 46 Pump drive cam 47 Pump stop cam 49 Micro switch for stop

Claims (1)

(57) [Claims] The pump is driven to feed the chemical in the tank to the injection knife, the chemical is injected into the ground from the tip of the injection knife, and after the chemical is injected by the film coating device attached to the rear of the injection knife. A soil disinfecting machine that covers the ground surface with a film, comprising: a rotating roller that is in contact with the film and rotates according to the feeding amount; and a pump driving unit that intermittently drives the pump by the number of rotations of the rotating roller. A chemical pump control device characterized by the above-mentioned.