JP5461916B2 - Soil disinfector - Google Patents

Description

  The present invention relates to a soil disinfector that is attached to a walking-type management machine having left and right traveling wheels and injects a chemical solution from a chemical solution tank into the soil, and is particularly effective in improving running performance and maintenance workability. The present invention relates to an arrangement configuration of components in a soil disinfecting machine.

  Conventionally, a soil disinfecting machine that is mounted on a walking-type management machine and injects a chemical into the soil by means of a chemical injection nail, each component of the soil disinfecting machine, particularly on a mounting frame fixed to the management machine, A technique is known in which a heavy component such as a chemical tank necessary for chemical supply is arranged to concentrate the weight on a management machine that is a drive unit so as to achieve an appropriate weight balance (for example, Patent Documents). 1). In this technology, a chemical pump and a switch box are arranged on one side of the mounting frame and a battery is arranged on the other side of the mounting frame, so that the right and left weight balance is optimized. By disposing the chemical tank, the influence on the operator from the change in weight of the chemical tank accompanying the consumption of the chemical liquid during work is reduced to prevent the work operability from deteriorating.

Japanese Utility Model Publication No. 6-23268

  However, in the above technique, since a heavy chemical tank containing chemical liquid is arranged near the upper part of the management machine or above the bowl molding machine, handling such as raising and lowering the heavy chemical tank in maintenance work such as tank replacement work However, there was a problem that it was a heavy burden for the workers. Further, a beam for supporting a rotary tiller is projected behind the management machine, and the chemical tank is disposed at the upper end of a pipe standing at the rear end of the beam. Although it is higher than the wheel, the center of gravity of the chemical solution tank is located behind the traveling wheel, and the distance from the axle of the traveling wheel to the center of gravity of the chemical solution tank (hereinafter referred to as “arm length”). become longer. Here, due to the heavy chemical tank, a large rotational moment (hereinafter simply referred to as “moment”) is always generated in the front-rear direction with the axle of the traveling wheel as the center of rotation. Therefore, if the chemical solution is consumed during the operation and the weight of the chemical solution tank changes, the moment also changes considerably. For this reason, the weight balance between the front and rear of the management machine during work cannot always be kept sufficiently good. Especially when the change in the weight of the chemical tank is large, the rotary tiller is moved up and down via the beam. There was a problem that the depth fluctuated.

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.
In claim 1, a sterilizing apparatus is configured by attaching a soil disinfecting machine for injecting chemical liquid from a chemical liquid tank into the soil to a walking-type management machine having left and right traveling wheels, and when the disinfecting apparatus is in operation. A mounting frame for mounting a plurality of components including the chemical solution tank is fixed to the front end portion of the management machine in the forward direction, and support arm portions are provided on the mounting frame on the left and right sides of the management machine. The support arm portion is disposed on the rotating surface of the traveling wheel or on the left and right outside of the rotating surface in the vicinity of a horizontal plane passing through the upper end of the traveling wheel, and the chemical tank is disposed on at least one of the support arm portions. And the chemical tank is arranged so that the center of gravity falls within the front-rear width of the traveling wheel in plan view.
In Claim 2, In the soil disinfector according to Claim 1, the support arm portion is placed between the rear end portion of the management device and the support arm portion on the mounting side of the chemical tank by the management device. A connecting member to be supported is interposed.

Since this invention was comprised as mentioned above, there exists an effect shown below.
That is, in claim 1, a plurality of structural members including heavy chemical tanks are attached to a support arm portion disposed in the vicinity of a horizontal plane passing through the upper end portion of the traveling wheel, and the structural members are disposed at an appropriate height. The placement height is too high, making it difficult to perform maintenance work such as replacing heavy components such as chemical tanks, and conversely, the placement height is too low and the components interfere with the soil projections. Can be reliably prevented, the burden on the worker in maintenance work can be reduced, and work efficiency and running performance can be improved.
Furthermore, the chemical tank can be arranged so that the center of gravity is within the front and rear width of the running wheel in plan view, and the length of the arm from the running wheel to the chemical tank can be shortened. Even if the tank's weight change is large, the change in moment in the longitudinal direction around the axle will be small, maintaining a good balance between the front and rear weights of the management machine being worked on, and reducing the variation in tillage depth due to the rotary tiller be able to.
In addition, the support arm portion can be arranged on the rotation surface of the traveling wheel or on the left and right outer sides of the rotation surface so that the space between the left and right support arm portions can be widened. It is strongly pressed downward on both the left and right sides, and the right and left weight balance of the management machine in operation can be maintained well.
3. The mounting frame according to claim 2, wherein the mounting rigidity of the mounting frame to the management machine can be increased, and even when the soil has a large unevenness or when traveling at high speed for movement in the field or between fields, Can be reliably prevented from swinging and the running performance can be further improved.

It is the left rear perspective view of the disinfection apparatus which shows the whole structure of the disinfection apparatus which equips the management machine with the soil disinfection machine concerning this invention. It is a side view of the management machine with which the chemical | medical solution supply part was mounted | worn. It is a schematic diagram which shows a chemical | medical solution injection structure. It is a front view of the management machine equipped with the chemical solution supply unit. It is also a plan view. It is a perspective view of a pump unit. Similarly, it is a side partial sectional view.

  Hereinafter, embodiments of the present invention will be described in detail. First, the whole structure of the disinfection apparatus 49 formed by mounting the soil disinfecting machine 1 according to the present invention on the walking-type management machine 2 will be described with reference to FIGS. 1 to 3. The direction indicated by the arrow F in FIG. 1 is the forward direction of the disinfection device 49, and the positions and directions of the members described below are based on this forward direction.

  First, a schematic configuration of the management machine 2 will be described. The management machine 2 includes a machine body 4 supported by a pair of left and right traveling wheels 3L and 3R constituting a traveling unit, and a rotary tilling mechanism 5 provided as a working unit at a lower end of the rear end of the machine body 4.

  The steering handle 6 is usually extended obliquely upward to the rear of the upper surface of the machine body 4. However, when the soil disinfector 1 is mounted, the steering handle 6 extends from position 7 to position 8. Turn and turn forward. The disinfection work is performed by the operator holding the steering handle 6 and pulling it lightly in the direction of the arrow F. The airframe 4 has a transmission having an engine 9 as a power source, and a transmission mechanism (not shown) for shifting the power from the engine 9 and transmitting it to the traveling wheels 3L and 3R and the rotary tilling mechanism 5. A case 10 is mounted.

  In the rotary tillage mechanism 5, a PTO transmission case 11 extends obliquely downward and rearward from the mission case 10, and a tillage case 12 extends further obliquely downward and rearward from the rear end of the PTO transmission case 11. Yes. The tilling claw shaft 13 is pivotally supported at the lower end portion of the tilling case 12 in a state of projecting to the left and right outside, and a plurality of tilling claws 14, 14. Is installed.

  On the other hand, a traveling transmission case 15 extends obliquely downward from the transmission case 10 and is pivotally supported at the lower end portion of the traveling transmission case 15 so that the axle 16 protrudes left and right. The traveling wheels 3L and 3R are mounted on the axle 16.

  In such a configuration, the power from the engine 9 is shifted by the speed change mechanism in the transmission case 10, and then this speed change power is transmitted from the travel transmission case 15 to the axle 16 so that the travel wheels 3L,. The 3R is driven to travel, and this speed change power is branched via a PTO transmission mechanism (not shown) in the tilling case 12 and transmitted to the tilling claw shaft 13. The claws 14, 14... Rotate forward and backward to perform tilling work.

  Further, the upper front end of the tilling case 12 is connected to the rear hitch 17 provided at the rear portion of the machine body 4 by pins 20 and 20, while a rear frame 18 extends rearward from the upper portion of the tilling case 12. On the rear base 18a of the rear frame 18, an adjustment mechanism 21 is fixed by a fixing ring 25 so that the screw rod 21b expands and contracts by rotating the upper handle 21a.

  In the adjusting mechanism 21, the lower end of the screw rod 21 b is connected to a stay 23 erected from the middle of the rotating frame 22, and the front end of the rotating frame 22 covers the tilling claws 14, 14. It is connected to a support pipe 24 that is laterally fixed on the upper surface of the tillage cover 19. The tillage cover 19 is pivotally supported about the tillage claw shaft 13 so as to be pivotable back and forth, and a rear cover 26 is provided at the rear of the tillage cover 19 to rotate the handle 21a. When the screw rod 21b is expanded and contracted, the tillage cover 19 and the rear cover 26 are rotated back and forth so that the positions can be manually adjusted according to the tilling depth.

  The upper end of the left and right fixed frames 48L and 48R is fixed to the support pipe 24, and gauge rings 47L and 47R are connected to the lower portions of the fixed frames 48L and 48R, respectively, so that the height can be adjusted. In addition, by setting the height of the gauge wheels 47L and 47R, the tilling depth can be set to a predetermined depth.

  Further, an L-shaped eaves upper surface forming plate 27 having an L-shape in side view is disposed behind the rear cover 26, and the eaves upper surface forming plate 27 is a forming plate provided at the rear portion of the rotating frame 22 so that the height can be adjusted. While being fixed to the back surface of the support stay 29, the left and right side surface forming plates 28L and 28R are arranged on the left and right ends of the top surface forming plate 27 so as to cover from the outside, respectively. However, when flowing into the space surrounded by the wrinkle forming plates 27, 28L and 28R, wrinkles having a predetermined size and shape are formed.

  Moreover, schematic structure of the soil disinfection machine 1 with which the management machine 2 which consists of such a structure is mounted | worn is demonstrated. The soil disinfecting machine 1 includes a chemical solution supply unit 31 that supplies a chemical solution at an appropriate amount and timing, and a working unit 32 that performs a multi-operation after injecting the supplied chemical solution into the soil.

  The chemical solution supply unit 31 supplies a chemical solution tank 30 for storing the chemical solution, a pump unit 35 that sucks the chemical solution from the chemical solution tank 30 and discharges it with pressure, and power for driving the motor 36 of the pump unit 35. And a controller 71 for appropriately driving / stopping the pump unit 35 by controlling the current from the battery 37. These components are predetermined according to the arrangement configuration described in detail later. It is arranged at the position.

  In the working section 32, the tip of the injection claw support stays 41L and 41R is fixed on the support pipe 24 on both sides of the forming plate support stay 29, and a chemical solution is provided at the rear end of the injection claw support stays 41L and 41R. The injection claws 33 and 34 are attached to be movable up and down, and the chemical solution injection claws 33 and 34 extend obliquely downward and rearward from the space between the rear cover 26 and the ridge upper surface forming plate 27 into the soil. And the front-end | tip part of injection | pouring hose 45 * 45 is fixed to the back surface of the chemical | medical solution injection | pouring nail | claws 33 * 34, The base end part of this injection | pouring hose 45 * 45 is connected to the upper end of the chemical | medical solution flow confirmation meter 42 * 42. . The lower ends of the chemical flow confirmation meters 42 and 42 are connected to the pump unit 35 via discharge hoses 44 and 44, respectively, and the pump unit 35 is connected to the chemical tank 30 via an intake hose 43, respectively. ing.

  In such a configuration, the chemical liquid from the chemical liquid tank 30 is sucked by the pump unit 35, and the suction hoses 43 and 43, the pump unit 35, the discharge hoses 44 and 44, the chemical flow confirmation meters 42 and 42, and the injection hose 45 are supplied. After being pumped to the chemical liquid injection claws 33 and 34 through 45, the liquid is injected into the soil from the tips of the injection hoses 45 and 45.

  A central frame 50 extends rearward from the upper portion of the forming plate support stay 29, a roll support stay 51 is suspended from a middle portion of the central frame 50, and a side surface is provided below the roll support stay 51. A pivot arm 52 having a reverse L-shape viewed from the front and rear is supported. The front end of the shaft support arm 52 is connected to the substantially right and left central portions of the horizontally disposed roller shaft 54, and left and right pressure-reducing rollers 53L and 53R are respectively provided on the left and right sides of the connection portion. It is pivotally supported so that it can rotate back and forth. From left and right ends of the roller shaft 54, left and right guide arms 65, 65 in the shape of fishhooks are projected outward, respectively, and when the multifilm 56 described later is fed out, By pressing both ends with the guide arms 65 and 65, the multi-film 56 can be pulled out without being loosened.

  A film pipe 55 is supported horizontally and diagonally above the pressure-reducing rollers 53L and 53R. The film pipes 55 are rotatably supported by the left and right film holders 57L and 57R. The film pipe 55 is wound with a multi-film 56 for covering the soil formed in the ridge after the chemical solution is injected. The film holders 57L and 57R are connected to the rear ends of the film frames 58L and 58R whose front ends are fixed to the support pipe 24.

  On the other hand, film treading wheels 59L and 59R are arranged on the left and right outer lines of the pressure reducing rollers 53L and 53R, respectively, and left and right soil covering disks 60L and 60R are arranged outside the film treading wheels 59L and 59R, respectively. Yes. The left film treading wheel 59L and the covering disc 60L are supported by the rear portion of the left treading pressure covering frame 62L extending rearward from the left end of the support pipe 24, and similarly, the right film tapping wheel 60L. 59R and the soil covering disk 60R are supported by the rear portion of the right treading pressure covering frame 62R extending rearward from the right end of the support pipe 24.

  The intermediate portions of the treading pressure covering frames 62L and 62R are connected to the rear ends of spring rods 63L and 63R, whose front ends are fixed to the upper surface of the tilling cover 19, via biasing springs 61L and 61R, respectively. 61R supports the tread pressure covering frames 62L and 62R so as to be able to swing up and down while being pressed downward. Each of the film treading wheels 59L and 59R is an opening type in which the spoke portion is small and the opening portions 59La and 59Ra occupy most of the film, and through the openings 59La and 59Ra, the covering soil disc 60L The soil from 60R is guided to the inner side of the left and right end portions of the multi-film 56 so as to cover the soil in a wide range.

  In such a configuration, when the left and right ends of the multi-film 56 wound around the film pipe 55 are pressed by the soil scraped up by the soil covering disks 60L and 60R, the management machine 2 moves forward. As a result, the multi-film 56 is pulled out to the soil surface. Then, after the entire width of the drawn multi film 56 is pressed against the upper surface of the heel by the pressure-reducing rollers 53L and 53R, the left and right end portions of the multi film 56 are pressed by the film treading wheels 59L and 59R. The soil is covered with the soil covering disks 60L and 60R, and the soil surface can be covered with the multi-film 56 so that the chemical solution injected into the soil as described above does not volatilize.

  Next, the arrangement of the chemical solution supply unit 31 will be described with reference to FIGS. 1, 4, and 5. A front hitch 66 is fastened and fixed to the front end of the management machine 2 by screws 72 and 72, and an abbreviation of a main bar 68 extending in the left-right direction on the back surface of a support plate 66a erected on the front hitch 66. The central part is fixed. The front end of the left arm 69 extending rearward is connected to the lower left end lower surface of the main bar 68 via a connector 73, and the rear upper end of the main bar 68 is also connected rearward via the connector 73. The main arm 68 and the left and right arms 69 and 70 constitute a mounting frame 67 for mounting components such as the chemical liquid tank 30.

  Here, the connecting member 73 is formed along a fixing member 74 formed in a U-shape in a side view that opens to the main bar 68 side at the front ends of the arms 69 and 70, and along the outer front and back surfaces of the fixing member 74. A contact plate 75 having a hole (not shown) that can be inserted into the bolts 74a and 74a to be hanged and screwed into the front ends of the bolts 74a and 74a that protrude through the hole. Are fixed to the fixing member 74, and the left and right arms 69 and 70 can be easily detached from the main bar 68 by attaching and detaching the bolts 76 and 76.

  A battery mounting table 80 is fixed to a front upper surface of the left arm 69 among the arms 69 and 70 arranged on the left and right sides of the management machine 2 via a connector 73, and the battery mounting table. The battery 37 is placed on 80. Furthermore, an inclined member 82 whose upper end is inclined obliquely downward and rearward is fixed to the upper surface of the rear portion of the left arm 69 via a connector 73, and a chemical tank mounting table 81 is fixed on the inclined member 82. The chemical liquid tank 30 is placed on the chemical liquid tank mounting table 81, and an L-shaped support stay 83 is projected outward from the bottom plate 81a of the chemical liquid tank mounting table 81, On the support stay 83, a bottle 84 containing cleaning water or the like is placed.

  Here, the chemical liquid tank 30 is restrained by a belt 86 provided so as to protrude forward from the upper end of the chemical liquid tank mounting table 81. Similarly, the bottle 84 also protrudes outward from the upper end of the support stay 83. The chemical liquid tank 30 and the bottle 84 are prevented from falling or jumping out due to vibration or impact during work traveling.

  The right arm 70 has a shorter front and rear length than the left arm 69, and a controller mounting base 87 is fixed to the upper surface of the front portion of the right arm 70 via a connector 73. The controller 71 is placed and fixed on an inclined surface 87a inclined obliquely forward and downward by the mounting table 87. Furthermore, a pump case 88 of the pump unit 35 is fixed to the upper surface of the rear portion of the right arm 70 via a connector 73.

  As described above, the arms 69 and 70 to which the chemical solution tank 30 and the like are attached in this way are extended rearward from the left and right ends of the main bar 68. As shown in FIG. Since it is arranged in the vicinity of the horizontal plane 77 passing through the upper ends of the traveling wheels 3L and 3R, the arrangement height of the left and right arms 69 and 70 can also be set in the vicinity of the horizontal plane 77.

  Further, with respect to the left and right positions of the arms 69 and 70, the left arm 69 is disposed outside a vertical plane (hereinafter referred to as “rotation plane”) 79L passing through the center in the width direction of the left traveling wheel 3L. Similarly, the right arm 70 is disposed outside the rotation surface 79R of the right traveling wheel 3R. The left and right positions of the arms 69 and 70 may be disposed on the rotation surfaces 79L and 79R, as long as the space between the left and right arms 69 and 70 can be sufficiently secured.

  In addition, the chemical tank 30 mounted on the chemical tank mounting table 81 on the upper surface of the rear part of the left arm 69 as described above has a center of gravity 30c within the front and rear width 78 of the left and right traveling wheels 3L and 3R. Has been placed. When the center of gravity 30c is positioned outside the front-rear width 78, the length of the arm from the axle 16 to the chemical tank 30 is increased, and the action of the moment caused by the heavy chemical tank 30 is increased. As the weight of the tank 30 changes, the front / rear weight balance of the management machine 2 also changes greatly.

  That is, in the soil disinfecting machine 1 that is attached to the walking-type management machine 2 including the left and right traveling wheels 3L and 3R and injects the chemical liquid from the chemical tank 30 into the soil, A mounting frame 67 for mounting a plurality of components including the chemical liquid tank 30 is fixed, and the mounting frame 67 is provided with arms 69 and 70 as support arm portions on the left and right sides with the management machine 2 interposed therebetween. The arms 69 and 70 are arranged on the rotation surfaces 79L and 79R of the traveling wheels 3L and 3R or on the left and right outside of the rotation surfaces 79L and 79R in the vicinity of the horizontal plane 77 passing through the upper ends of the traveling wheels 3L and 3R. The chemical tank 30 is placed on at least one of the arms 69 and 70 on the left arm 69 in this embodiment, and the chemical tank 30 is within the front-rear width 78 of the traveling wheels 3L and 3R in plan view. Heavy 30c can be accommodated, so that the arms 69 and 70 can be arranged in the vicinity of the horizontal plane 77, and the components such as the chemical tank 30 can be arranged at an appropriate height. Maintenance work such as replacement of heavy components such as the tank 30 is difficult, and conversely, the arrangement height is too low to prevent the components from interfering with the convex portions of the soil. It is possible to reduce the burden on the worker in maintenance work and to improve work efficiency and running performance.

  Furthermore, the chemical tank 30 may be arranged so that the center of gravity 30c is within the front-rear width 78 of the traveling wheels 3L and 3R in plan view, and the length of the arm from the traveling wheels 3L and 3R to the chemical tank 30 may be shortened. Even if the weight change of the chemical liquid tank 30 due to the chemical liquid consumption during the work is large, the change in the moment in the front-rear direction around the axle 16 becomes small, and the front-rear weight balance of the management machine 2 during the work can be kept good. The variation in tilling depth by the rotary tilling mechanism 5 can also be reduced. In addition, the arms 69 and 70 are arranged on the rotation surfaces 79L and 79R of the traveling wheels 3L and 3R or on the left and right outside of the rotation surfaces 79L and 79R, so that the space between the left and right arms 69 and 70 is wide. Therefore, the management machine 2 is strongly pressed downward on both the left and right sides by the weight of the constituent members, and the right and left weight balance of the management machine 2 in operation can be kept good. The arrangement of the plurality of constituent members including the chemical liquid tank 30 may be the reverse of the configuration of the present embodiment, the left and right positions of the arms 69 and 70 on which the chemical liquid tank 30 is placed, and the chemical liquid tank 30 The front and rear positions of the center of gravity need only be within the scope of the present invention, and are not particularly limited.

  An arm side stay 89 is erected from the upper surface of the rear end portion of the left arm 69, and an airframe side stay 90 is erected from the upper surface of the rear hitch 17. The inner end of 92 is fastened by a bolt 91, and the outer end of the joint 92 is fastened to the arm side stay 89 by a bolt 91, and the rear end of the left arm 69 is used as the rear end of the management machine 2. The left arm 69 is increased in rigidity by being connected via a joint 92.

  The joint 92 includes a hollow pipe 92a and a telescopic rod 92b that is inserted into the pipe 92a and slides. After the slide of the telescopic rod 92b in the pipe 92a, the pipe 92a The adjustment bolt 93 provided on the pipe 92a is rotated to hold the side surface of the telescopic rod 92b in the pipe 92a so that the total length of the joint 92 can be adjusted according to the specifications of the management machine 2 and the mounting frame 67.

  That is, the left arm 69 is supported by the management machine 2 between the rear hitch 17 which is the front and rear other end of the management machine 2 and the left arm 69 which is a support arm part on the mounting side of the chemical tank 30. Since the joint 92 that is the connecting member is interposed, the attachment rigidity of the attachment frame 67 to the management machine 2 can be increased, and when the unevenness of the soil is large or in the field or between the fields at high speed Even when traveling, it is possible to reliably prevent the mounting frame 67 including the main bar 68 and the left and right arms 69 and 70 from swinging greatly during traveling, thereby further improving traveling performance.

  Next, the pump unit 35 will be described with reference to FIGS. 1 and 5 to 7. The pump unit 35 is configured to accommodate two chemical pumps 38 and 39 in a pump case 88. In the chemical pump 38, a driving device 94 is provided inside the front of the pump case 88. The driving device 94 is linked and interlocked with a pressure feeding device 95 provided on the upper surface of the front portion of the pump case 88.

  In the pressure feeding device 95, a diaphragm 96 is fixed by being sandwiched from above and below by a valve mounting member 97 and a diaphragm mounting member 98. From the valve mounting member 97, a suction port 99 and a discharge port communicating with the diaphragm 96 are provided. The suction port 99 and the discharge port 100 are connected to the suction hose 43 and the discharge hose 44, respectively. On the other hand, a connecting pin 101 is suspended in the pump case 88 from the lower center of the diaphragm 96, and a connecting rod 102, which is a reciprocating body, is connected to the connecting pin 101, and the connecting pin 101 is connected to the pump case. The pin support stay 103 projecting rearward from the front side surface 88a of the 88 is slidably inserted into and supported by the vertical hole 103a.

  In the driving device 94, the lower end of the connecting rod 102 of the pressure feeding device 95 is pivotally supported on the upper end of the swing crank 104 via the pivot shaft 105, and is prevented from coming off by the fastener 106. . The swinging crank 104 has a long hole 104a on the pressure feeding device 95 side, and an elliptical hole 104b on the motor 36 side. The long hole 104a has a swinging fulcrum. A fulcrum cam 107 is inserted, and an eccentric cam 108 is inserted into the elliptical hole 104b.

  The fulcrum cam 107 is formed in a disk shape, and a metering shaft 109 passes through the center of the fulcrum cam 107 and is pivotally supported by the metering shaft 109. Further, the metering shaft 109 is fastened and fixed to the front portion of the metering lever 110, and then inserted into a side guide hole 88b formed in a long hole shape on the front side surface 88a of the pump case 88.

  The metering lever 110 is disposed in parallel with the swinging crank 104, and its base is pivotally supported by a lever guide 111 attached to the pump case 88, and the metering lever 110 protrudes outward from the lever guide 111. The lever 110 is bent downward to form a lever operating portion 110a. Further, the metering lever 110 is formed with a flat contact portion 110b on the outer peripheral side surface on the side guide hole 88b side, and the lever guide 111 is provided with a screw insertion portion 112b of the fixed knob 112 on the metering lever. It is screwed so as to be perpendicular to the lever 110. By rotating the grip 112a of the fixed knob 112, the tip of the screw 112b advances and retracts toward the abutment 110b, and the adjustment is made. The quantity lever 110 is clamped between the lever guide 111 and the inner wall 111a so as to be fixed at a specific position, or conversely, it is separated from the inner wall 111a so as to be freely slidable in the longitudinal direction of the swing crank 104.

  A drive shaft 113 is connected to the shaft portion of the eccentric cam 108 by a key 114 so as not to be relatively rotatable. Further, the eccentric cam 108 is slidably supported in the elliptical hole 104b of the swing crank 104 via the collar 115, and donut-shaped fixing members 116 and 116 are fitted on both side surfaces of the collar 115. The eccentric cam 108 and the collar 115 are fixed so as not to come out of the swinging crank 104. The drive shaft 113 passing through the eccentric cam 108 projects forward from the pump case 88, and one end of the drive shaft 113 is connected to the motor 36 in the motor case 117 fixed to the front side surface of the pump case 88. While connected to an output shaft (not shown), the other end of the drive shaft 113 is configured to be able to drive the chemical pump 39 adjacent to the rear.

  In such a configuration, the screw insertion portion 112b is rotated by holding the holding portion 112a of the fixed knob 112, and the tip of the screw insertion portion 112b is slightly separated from the contact portion 110b on the side surface of the metering lever 110. Then, when the metering lever 110 is pushed and pulled in the longitudinal direction of the swinging crank 104 by holding the lever operation unit 110a and is slid, the metering shaft 109 fixed to the tip of the metering lever 110 is While being guided by the side guide hole 88b, it quickly slides in the longitudinal direction of the swing crank 104, and at the same time, the fulcrum cam 107 supported by the metering shaft 109 is also moved in a short time.

  After the fulcrum cam 107 is fixed at a predetermined position, when the motor 36 is driven by turning on and off the switch 71a of the controller 71, the drive shaft 113 is rotationally driven via an output shaft (not shown) and the eccentric cam 108 is driven. Rotates. Then, one end of the swing crank 104 slidably contacted with the eccentric cam 108 reciprocates up and down, and the other end of the swing crank 104 also reciprocates up and down with the fulcrum cam 107 as a fulcrum. A diaphragm 96 connected to the other end of the swing crank 104 via the connecting rod 102 also reciprocates up and down. As a result, the valves provided in the suction port 99 and the discharge port 100 are opened and closed, and the chemical liquid suction operation and the discharge operation are repeated.

  Further, when the metering lever 110 is pushed and pulled to perform the sliding operation, the fulcrum cam 107 slides in the long hole 104a, and the position of the swing fulcrum of the swing crank 104 is changed, whereas the eccentric cam 108 is The vertical reciprocation width on the side of the eccentric cam 108 is constant because it cannot move. Therefore, when the fulcrum cam 107 serving as the oscillating fulcrum is moved toward the eccentric cam 108, the vertical reciprocating width on the opposite side of the oscillating crank 104, that is, on the pivot shaft 105 side, is increased and sucked into the diaphragm 96. The amount of chemical liquid to be increased increases, and the amount of chemical liquid discharged also increases. On the contrary, when the fulcrum cam 107 is separated from the eccentric cam 108, the vertical reciprocating width on the pivot shaft 105 side is shortened, the amount of the chemical liquid sucked into the diaphragm 96 is decreased, and the chemical liquid discharge amount is also decreased. ing. The above is the operation configuration of the chemical pump 38, but the adjacent chemical pump 39 is the same, and the description thereof is omitted.

  A configuration for reading the set value of the chemical discharge amount that can be changed in this way will be described. In the metering shaft 109 penetrating the fulcrum cam 107 moved by the metering lever 110, a flat mounting portion 109a is formed on the left outer peripheral side surface of the metering shaft 109, and a single mounting portion 109a is formed on the mounting portion 109a. A long plate-shaped needle plate 118 is attached. The needle plate 118 includes a mounting portion 118a that is suspended to be fixed to the mounting portion 109a, an extending portion 118b that is bent and extended obliquely upward and to the left at the upper end position of the mounting portion 118a, and the extension plate 118b. The indicator 118c is bent upward and is erected upward at the upper end position of the installation portion 118b. A sharp pointer 118d is formed at the tip of the indicator 118c.

  The indicator 118c is inserted into the upper surface 88c of the pump case 88 from the lower side with respect to the upper surface guide hole 88d formed in the shape of a long hole in the left-right direction, and the pointer 118d provided at the tip is connected to the pump case 88. On the other hand, a scale plate 119 for reading the position of the pointer 118d is disposed in the longitudinal direction of the upper surface guide hole 88d. Both the scale plate 119 and the upper surface guide hole 88d are arranged in parallel with the metering lever 110.

  In such a configuration, when the metering lever 110 is pushed and pulled, as described above, the fulcrum cam 107 at the swing center moves, and the vertical reciprocating width of the diaphragm 96 fluctuates to increase or decrease the chemical discharge amount. At the same time, the indicator 118c of the needle plate 118 is moved in conjunction with the movement of the fulcrum cam 107, and the pointer 118d of the indicator 118c is disposed on the upper surface of the pump case 88 so that it can be easily seen from above. Further, the side of the scale plate 119 is moved to a scale position corresponding to the chemical solution discharge amount.

  That is, the chemical pumps 38 and 39 are provided on a metering lever 110 for setting a chemical liquid discharge amount, an instruction portion 118c that moves in conjunction with the metering lever 110, and an upper surface 88c of the pump case 88, and Since the scale plate 119 for reading the position of the pointer 118d of the instruction unit 118c is provided, the operator can easily check the scale position of the pointer 118d from above, and the pointer or scale plate is provided on the side surface of the pump case 88. Unlike this, it is not necessary to check the set value of the chemical solution discharge amount by turning to the side, and the check operation of the chemical solution discharge amount can be performed quickly and accurately.

  Further, the chemical pumps 38 and 39 that can easily read the set value of the chemical discharge amount as described above are housed in the pump case 88 as described above, and the right arm provided on the right side of the management machine 2 as the pump unit 35. 70 is disposed on the upper surface of the rear part, but the right arm 70 is disposed not on the inner side in the horizontal direction of the soil disinfecting machine 1 but on the right outer side. It is not necessary for the operator to access the pump unit 35 so as to get out from above the soil disinfecting machine 1 in order to perform maintenance and the like.

  That is, since the chemical pumps 38 and 39 are arranged side by side in the front-rear direction at least on the left and right sides of the soil disinfector 1, and in this embodiment, on the right outer edge, the operator can easily access the chemical pumps 38 and 39 from the side. To change the set value of the chemical solution discharge amount, maintain the chemical solution pumps 38 and 39, etc., and further reduce the work load when performing the change operation and maintenance operation of the chemical solution discharge amount. .

  The present invention can be applied to all soil disinfectants that are mounted on a walking-type management machine having left and right traveling wheels and inject a chemical from a chemical tank into the soil.

1 soil disinfector 2 management machine 3L / 3R traveling wheel 17 rear hitch (front and rear other end)
30 Chemical tank 30c Center of gravity 67 Mounting frame 69/70 Left and right arm (support arm)
77 Horizontal plane 78 Front / rear width 79L / 79R Rotating surface
92 Joint (connecting member)

Claims (2)

A walking-type management machine having left and right traveling wheels is equipped with a soil disinfecting machine that injects a chemical solution from a chemical solution tank into the soil to form a disinfection device, and the management device that is the forward direction during the operation of the disinfection device A mounting frame for mounting a plurality of components including the chemical solution tank is fixed to the front end of the mounting frame, and support arm portions are provided on the mounting frame on the left and right sides of the management machine. , In the vicinity of a horizontal plane passing through the upper end of the traveling wheel, on the rotating surface of the traveling wheel or on the left and right outside of the rotating surface, and placing the chemical tank on at least one of the support arm portion, The soil disinfecting machine, wherein the chemical tank is arranged so that the center of gravity is within the front-rear width of the traveling wheel in plan view. 2. The soil disinfector according to claim 1, wherein a connecting member that supports the support arm portion by the management device is interposed between a rear end portion of the management device and a support arm portion on the mounting side of the chemical tank. A soil disinfector characterized by the installation.

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