JP4700529B2 - Seedling guide structure of seedling planting equipment - Google Patents

Description

  The present invention relates to a seedling planting device in which a seedling guide is attached to a sliding rail that guides and supports the lower end portion of a seedling base that reciprocates left and right, along a tip movement trajectory of a planting claw downward from a seedling extraction port. It relates to a seedling guide structure.

As a seedling guide used in the seedling guide structure, for example, as disclosed in Patent Document 1, a resin seedling guide body that is disposed opposite to the left and right in the form of a vertical wall across the tip movement locus of the planting claw And a back guide made of stainless steel that is placed in a cantilevered downward direction along the tip movement trajectory of the planting claw so as to close the back side (front) of the left and right seedling guide bodies. The seedlings that are cut out from the lower end of the stand with the planting claws and conveyed downward are elastically sandwiched and guided from the left and right by the seedling guide body that is arranged in a slightly constricted form, and the seedlings of the extracted seedlings collapsed. In addition to suppressing the spread of seedlings, sliding guides from the front are guided by the back guide to prevent the removed seedlings from slipping forward from the planting claws.
JP 2000-60246 A

  In the seedling guide having the above configuration, the guide space through which the planting claw and the removed seedling pass is surrounded by the left and right seedling guide bodies and the back side guide and has a long groove shape opened rearward. It can be reliably guided from the front with a surface and exhibits a high guidance function, but on the other hand, the guide space has a long groove shape in the vertical direction and has large guide surfaces on the left and right and the front. In addition, there is a risk that mud in the field that has been lifted by adhering to the planting claws and part of the bed soil of the extracted seedling will adhere to and accumulate on the inner surface of the seedling guide and the seedling guiding function may be impaired.

  In order to eliminate such problems, the back side guide deployed in the inner part of the guide space is made into a rod shape, so that mud can escape from the inner part of the guide space, to the inner surface of the seedling guide Although it has been devised to eliminate mud adhesion and deposition, mud adhesion and deposition can be eliminated, but more mud jumps out from the inside of the guide space and adheres to the upper surface of the leveling float.

  In recent rice transplanters, a part of the leveling floats (generally the central one) out of the multiple leveling floats mounted on the seedling planting device so that it can swing up and down around the rear fulcrum is The sensor float that swings up and down is automatically controlled, and automatic lifting control is performed to raise and lower the seedling planting device by detecting the vertical swing displacement of this sensor float. It is configured to maintain the predetermined height and stabilize the planting depth. In the seedling planting apparatus in which such automatic raising / lowering control is performed, mud adheres and accumulates on the sensor float, so that the float weight increases, and the reference load (sensor load) for pressing the sensor float downward (in the ground contact direction) increases. . For this reason, the sensor float is less likely to be displaced upward, the control sensitivity to the ascending operation is dulled, and the planting depth changes to an eye deeper than expected.

  The present invention has been made paying attention to such points, and while eliminating mud adhesion and accumulation on the inner surface of the seedling guide and exerting a good guiding function, the adverse effect due to mud slipping out from the seedling guide is achieved. The main purpose is to control.

The first invention is a seedling planting in which a seedling guide is attached to a sliding rail that guides and supports the lower end of a seedling table that reciprocates left and right from the seedling extraction opening along the tip trajectory of the planting claw. In the seedling guide structure of the device,
The seedling guide is spaced between a vertical wall-shaped horizontal guide portion disposed opposite to the left and right across the tip movement trajectory of the planting claw and the left and right horizontal guide portions. a central guide section in that will be deployed in the form having downwardly pieces along the distal movement locus of planting claw at a, and a busy tool front side cover part between the side guide portions of the right and left in front of the central guide portion Configure and prepare
While installing the front cover portion corresponding to the upper half of the lateral guide portion,
The rear edge of the front cover part is formed so as to be further away from the rear edge of the rear edge of the central guide part provided along the tip movement locus of the planting claw, and the lower end of the front cover part Further, a mud removal space opened downward in front of the lateral guide portion is formed .

  According to the above configuration, since a narrow central guide portion exists in the inner part of the guide space formed inside the seedling guide, the floor soil portion of the seedling held by the planting claws is separated from the front by the central guide portion. The sliding contact is guided and the seedling is prevented from coming off from the tip of the planting claw.

  Since the left and right sides of the central guide (except the front cover) are open, mud adhering to the planting nails and soil separated from the seedling floor soil can easily escape from the left and right of the central guide. A large amount of deposits and deposits do not occur inside.

A part of the inner part of the guide space formed inside the seedling guide is blocked by a front cover part that is long in the vertical direction, so that the forward cover part prevents the mud from jumping forward and the top surface of the leveling float. You can make sure that you don't get down to.
Therefore, according to the first aspect of the present invention, mud can be prevented from accumulating on the inner surface of the seedling guide and a good guiding function can be exhibited, and adverse effects on the leveling float due to mud slipping out of the seedling guide can be suppressed. It becomes possible.

According to the said structure, the upper half of a seedling guide is an area | region where mud tends to fly forward vigorously, and by disposing a front cover part here, scattering of mud can be suppressed efficiently. In the area below the front cover, the seedling guide guide space will be opened forward, but in this area the mud scatters downward, and the mud does not go directly to the top surface of the leveling float. It falls on the surface.
Further, according to the above configuration, the mud received on the inner surface of the lateral guide portion is easily discharged downward through the mud removal space, and the mud adheres and accumulates inside the lateral guide portion. Thus, the seedling guidance function is not impaired.

According to a second invention, in the first invention,
The left and right lateral guide portions are bridged and connected at the front cover portion.

  According to the above configuration, the front cover portion not only has a function of preventing mud from coming out, but also prevents the lateral guide portions on the left and right from expanding and deforming outward on the left and right, and the width of the guide space formed inside the seedling guide Can be maintained stably and a good seedling guiding action can be exhibited.

According to a third invention, in the first or second invention,
The lateral guide portion, the central guide portion, and the front cover portion are integrally formed.

  According to the said structure, the intensity | strength of the whole seedling guide becomes high, and even if it shape | molds with a resin material, it can be used favorably over a long period of time.

  FIG. 1 shows a side view of a seedling planting device 1 having a six-row planting specification that is connected to the rear part of the riding rice transplanter. This seedling planting device 1 is connected to the lower part of the rear end of the elevating link mechanism 2 provided on the left-side traveling machine body in the figure so as to be able to roll freely. Seedling stand 3 that is reciprocally moved laterally, 6 sets of rotary planting mechanisms 4 that cut out seedlings from the lower end of this seedling stand 3 and plant them on the rice field, and the planting location of the rice field T in units of 2 The three leveling floats 5 arranged in parallel so as to level the ground are provided.

  Each leveling float 5 is supported so as to be able to swing up and down around the rear fulcrum a, and the leveling float 5 at the center serves as a sensor float SF for detecting the ground height of the seedling planting device 1. The vertical displacement of the sensor float SF is detected by the potentiometer PM, and the lifting link mechanism 2 is driven up and down by a hydraulic cylinder (not shown) based on the detected information. Even so, the automatic raising / lowering control is performed such that the seedling planting device 1 maintains a predetermined height range with respect to the rice field T.

  In the lower part of the seedling planting device 1, a long rectangular tube-shaped planting frame 6 is provided on the left and right, and a feed case 7 that receives power from the traveling machine body is connected to the left and right intermediate parts of the planting frame 6 and planted. The planting drive case 8 is connected to the frame 6 from the left and right positions in a rearward cantilever manner. At the rear of each planting drive case 8, a planting drive shaft 9 that is rotationally driven in a fixed direction passes through the planting drive shaft 9, and the planting mechanism 4 is mounted on the planting drive shaft 9.

  The planting mechanism 4 includes a rotating case 10 that is rotationally driven by the planting drive shaft 9, and a claw case 11 that is pivotally supported around the horizontal axis on the lateral outer sides of both ends of the rotating case 10. Each nail case 11 is provided with a planting claw 12 and a seedling pushing tool 13. A non-constant speed gear (not shown) in which the claw case 11 is housed in the rotary case 10 in conjunction with the rotation of the rotary case 10 at a constant speed in the forward rotation direction (counterclockwise in FIG. 1) by the planting drive shaft 9. The transmission mechanism is rotated one revolution in the opposite direction at an unequal speed, whereby the planting claw 12 circulates while drawing a vertically long tip movement trajectory S extending between the lower end of the seedling bed 3 and the field surface T. ing. The planting claw 12 is configured so that the seedling pusher 13 protrudes toward the toe side when the planting f cut out and held from the lower end of the seedling platform is brought into the surface T, and the planted nail is separated from the planting claw 12 and pushed into the ground. Has been.

  A slide rail 15 made of an aluminum extrusion molding material is horizontally supported at a location above the base of the planting drive cases 8 arranged in parallel, and a slide member 16 connected to the lower surface of the lower end of the seedling bed 3 is obliquely supported on the slide rail 15. It is fitted from above. A pair of left and right support columns 17 are erected from the planting frame 6, and the seedling table 3 is received and supported by the upper end of the support column 17 so as to be slidable from the back side.

  The seedling setting table 3 is configured to have a width that allows six seedlings formed by resin molding in units of one line to be connected to the left and right, so that six seedlings can be placed. A seedling feeding belt 18 is provided at the bottom. The seedling feeding belt 18 is driven to rotate downward by a predetermined amount every time the seedling setting table 3 reaches the lateral movement stroke end, and to feed the mat-like seedling placed thereon downward.

  Contact-type seedling remaining amount sensors 19 are provided on the left and right sides of the seedling feeding belt 18 of each strip. The seedling remaining amount sensor 19 is connected to a detection device on the traveling machine body side, and when it is detected that the end (upper end) of the mat-shaped seedling placed is detached from the seedling remaining amount sensor 19, The notification means (alarm lamp, alarm buzzer) provided in the driving unit is activated to prompt the driver to replenish seedlings. As shown in FIG. 6, the harness 20 led out from the seedling remaining amount sensor 19 toward the traveling machine body is elastically engaged and locked by a clamp claw 21 formed integrally with the back surface of the seedling rest 3, so that a predetermined amount is obtained. It is wired along the path.

  As shown in FIGS. 6 to 8, an extended seedling support 22 is slidably inserted into the upper end of the seedling support 3 for each strip, and the seedlings 22 are extended when the extended seedling support 22 is extended. The entire setting table has a length that allows two mat-like seedlings to be placed and accommodated in a column. The extension seedling table 22 is formed in a substantially comb-like shape by integrally forming a pair of left and right main body portions 22a formed in the left and right directions and a plurality of rib portions 22b formed in a rod shape with a resin material. Yes. The main body 22a is inserted and supported between a support frame 14 that is horizontally connected to the back of the seedling platform and the lower surface of the seedling platform, and the rib 22b is superposed on the upper surface of the seedling platform 3. A large number of vertical ribs 23 are formed on the top surface of the seedling table 3 to facilitate the downward sliding of the mat-shaped seedlings placed thereon, and the rib portion 22b of the extended seedling table 22 is formed in an inverted U shape. A plurality of rib portions 22b of the extended seedling table 22 are externally fitted to the vertical ribs 23 of the seedling table 3 from above. As a result, the extension seedling table 22 is positioned to the left and right, and can slide in and out in a straight line without distortion.

  A seedling extraction opening 25 through which the planting claw 12 in each planting line passes is cut out at six locations in the longitudinal direction of the slide rail 15, and the tip of the planting claw 12 faces downward from the seedling extraction opening 25. A curved seedling guide 26 is attached in a side view along the movement locus S.

  The seedling guide 26 is integrally formed of a resin material, and is formed between a vertical wall-shaped horizontal guide portion 26a disposed opposite to the left and right across the tip movement locus S of the planting claw 12 and the left and right horizontal guide portions 26a. The center guide part 26b having a small width on the left and right, which is arranged in a cantilever direction downward along the tip movement locus S of the planting claw 12, and the top and bottom closing the space between the left and right side guide parts 26a in front of the center guide part 26b. A long front cover portion 26 c and left and right attachment pieces 26 d for the slide rail 15 are provided.

  The left and right lateral guide portions 26a are opposed to the underarm narrowing, and elastically sandwich the seedling f cut and held by the planting claws 12 from the left and right to suppress the collapse of the floor soil portion and the spread of the seedling leaves. . The front ends of the left and right lateral guide portions 26a are connected to each other by a bridging portion 26e, and the bridging portion 26e is engaged with a shallow groove 27 formed on the rear surface of the slide rail 15, thereby Vertical positioning has been made.

  The central guide portion 26b slides and guides the floor soil portion of the seedling f held by the planting claws 12 from the front to prevent the seedling f from slipping forward.

  The front cover portion 26c bridges and connects the left and right lateral guide portions 26a at a height corresponding to the upper half of the seedling guide 26, and the central guide portion 26b extends downward from the inner surface of the front cover portion 26c. Has been. The front cover portion 26c is provided farther forward than the lateral guide portion 26a, and a mud removal space c opened downward is formed at the lower end of the front cover portion 26c so as to be positioned on the left and right of the central guide portion 26b. ing.

  The mounting piece 26d extends laterally outward from the upper end of the lateral guide portion 26a, and is connected to the vertical wall portion 15a of the slide rail 15 by screws or caulking on the left and right sides of the seedling outlet 25.

  The seedling guide structure according to the present invention is configured as described above, and when the planting claw 12 passes through the seedling guide 26, the soil separated from the mud adhering to the planting claw 12 and the floor soil portion of the extracted seedling f is Jumping forward due to the inertia associated with the movement of the planting claw 12 is prevented from being received by the front cover portion 26c and falls through the mud removal space c at the lower end of the front cover portion 26c, so that it does not fall on the leveling float 5. It falls on Tamotsu T.

  [Other Examples]

  (1) The center guide portion 26b may be separately manufactured from a metal material or the like, and the upper portion thereof may be connected and supported to the front cover portion 26c.

  (2) The front cover portion 26c can be made of a metal plate and can be cross-linked to the left and right lateral guide portions 26a.

  (3) The planting mechanism 4 can be applied to the seedling planting apparatus 1 using a crank type.

Side view of seedling planting device Front view of seedling platform (B) Side view of seedling removal location, (b) AA line cross section, BB line cross section, CC line cross section Rear view of seedling guide Front view of seedling guide Vertical side view of seedling platform Front view of the top of the seedling platform and the extended seedling platform Longitudinal section of seedling bed and extended seedling bed

3 Seedling stand 12 Planting claw 15 Sliding rail 25 Seedling outlet 26 Seedling guide 26a Side guide part 26b Center guide part 26c Front cover part c Mud removal space S Tip movement locus

Claims (3)

In the seedling guide structure of the seedling planting device, in which a seedling guide is attached to the sliding rail that guides and supports the lower end of the seedling platform that reciprocates left and right, and the planting guide along the tip movement trajectory of the planting claw is directed downward from the seedling extraction port ,
The seedling guide is spaced between a vertical wall-shaped horizontal guide portion disposed opposite to the left and right across the tip movement trajectory of the planting claw and the left and right horizontal guide portions. a central guide section in that will be deployed in the form having downwardly pieces along the distal movement locus of planting claw at a, and a busy tool front side cover part between the side guide portions of the right and left in front of the central guide portion Configure and prepare
While installing the front cover portion corresponding to the upper half of the lateral guide portion,
The rear edge of the front cover part is formed so as to be further away from the rear edge of the rear edge of the central guide part provided along the tip movement locus of the planting claw, and the lower end of the front cover part A seedling guiding structure for a seedling planting apparatus , wherein a mud removal space opened downward in front of the lateral guide portion is formed .   The seedling guiding structure of the seedling planting apparatus according to claim 1, wherein the left and right lateral guide portions are bridged and connected at the front cover portion. The seedling guiding structure of the seedling planting apparatus according to claim 1 or 2 , wherein the lateral guide part, the central guide part, and the front cover part are integrally formed.

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