JP2007043961A - Riding type rice transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a riding type rice transplanter having a seedling transplanting device connected to the back of a traveling body in a vertically movable manner and an auxiliary step extending outward from a side of an operation step of the traveling body and firmly connected to the body with a simple and inexpensive structure. <P>SOLUTION: A supporting frame 39 is extended slantly upward from the lower part of a transmission case 9 in lateral direction toward outside and an auxiliary step 35 is connected to the extended end of the supporting frame 39. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a riding type rice transplanter in which a seedling planting device is connected to a rear portion of a traveling machine body so as to be movable up and down, and in particular, a riding type rice transplanter in which a seedling planting device configured to have a multi-row planting specification of 5 or more is connected. About.

In the riding type rice transplanter to which the four-row planting seedling planting device is connected, the lateral width of the operation step of the traveling machine body is slightly smaller than the lateral width of the seedling platform provided in the seedling planting device. It is possible to replenish seedlings to the outermost strip of the seedling stand by standing at the lateral end, but when configured to connect to this traveling machine body with a seedling planting device of 5 or 6 plants, Even when standing at the lateral edge of the driving step, it is difficult to reach the outermost strip, and thus, conventionally, for example, as disclosed in Patent Document 1, the auxiliary step is extended laterally outside the driving step. It is deployed so that the seedling can be easily supplied to the outermost strip.
Japanese Patent Laid-Open No. 11-89336

  In order to provide the auxiliary step as described above, in the above-described conventional structure, the connecting member 32 is attached to the support member 25 and the step 13 itself extending laterally outward from the body frame 5, and the auxiliary step 26 is attached to the connecting member 32. The structure which connects and supports is adopted.

  However, in the above-described conventional structure, since the fuselage frame 5 and the step 13 are substantially at the same height as the step 13, the connecting member 32 of the auxiliary step 26 arranged at the same level as the step 13 is laterally outward. Therefore, when the worker stands near the outer end of the auxiliary step, a large bending load is applied to the connecting member 32 and the bending becomes easy. Of course, it is possible to reduce the above-mentioned bending by increasing the rigidity of the connecting member 32 by increasing the thickness, increasing the rigidity, attaching the reinforcing rib, etc., but for that reason the aircraft weight increases, This resulted in a new problem of high processing costs.

  The present invention has been made paying attention to such points, and has as its main object to make it possible to firmly connect and support the auxiliary step with a structure that can be implemented simply and inexpensively.

The first invention is a riding type rice transplanter in which a seedling planting device is connected to a rear part of a traveling machine body so as to be movable up and down, and an auxiliary step is extended and deployed laterally outside a driving step in the traveling machine body.
A support frame is extended obliquely upward from the lower part of the transmission case toward the laterally outer side, and the auxiliary step is connected and supported to the extended end of the support frame.

  According to the above configuration, the mission case is arranged at a low position of the traveling body, and the lower part thereof is at a position considerably lower than the driving step and the body frame. Therefore, the support frame extending laterally upward from the lower part of the transmission case is inclined upward substantially, and when a load is applied downward to the extended end of the support frame, the load is , It will work as a compressive component force in the longitudinal direction of the support frame and a bending component force in the direction orthogonal to the support frame, compared to the case where the support frame is extended horizontally and the same load is applied to the extended end It becomes difficult to bend downward.

  Therefore, according to the first invention, the auxiliary step can be firmly connected and supported with a structure that can be implemented easily and inexpensively by effectively utilizing the fact that the mission case is arranged at a low position of the airframe.

According to a second invention, in the first invention,
A central portion of the support frame is connected to a transmission case, and the left and right auxiliary steps are connected and supported at the left and right extending ends of the support frame.

  According to the above configuration, the support frame is attached to the transmission case only once, which is effective in improving the assembly workability.

According to a third invention, in the first or second invention,
The planar shape of the front part in the auxiliary step is formed in a tapered shape whose outer side is inclined toward the inside of the aircraft body, and the spare seedlings are placed and accommodated in a plurality of stages in the laterally outward part of the tapered part. This is a stand-up support stand.

  According to the said structure, a support | pillar can be stood up inside a machine body as much as possible, and it can suppress that a machine body horizontal width becomes large by installation of a reserve seedling stand.

According to a fourth invention, in the third invention,
The strut of the reserve seedling table is configured to be tiltable back and forth.

  According to the above configuration, the column can be erected as much as possible inside the body while allowing the column to swing back and forth, and the above-described effect of the third aspect of the invention is promoted.

  FIG. 1 is an overall side view of a riding type rice transplanter according to the present invention, and FIG. 2 is an overall plan view thereof. This riding type rice transplanter is configured in a six-row planting specification at the rear of a four-wheel drive type traveling machine body 3 having a pair of left and right front wheels 1 that can be steered and a pair of left and right rear wheels 2 that cannot be steered. The seedling planting device 4 is provided with a basic structure that is connected to be movable up and down via a link mechanism 6 having a four-link structure driven by a hydraulic cylinder 5, and a fertilizer 7 is provided at the rear part of the traveling machine body 3. In addition, there is a structure in which a reserve seedling table 8 is erected on the front left and right of the traveling machine body 3.

  The traveling body 3 is provided with a mission case 9 that pivotally supports the front wheel 1, and the rear wheel 2 is pivotally supported at the rear end of a swing case 10 that is connected to the rear left and right of the mission case 9 so as to swing up and down. ing. A front frame 11 extending forward from the mission case 9 is equipped with a prime mover 13 in which an engine (not shown) is accommodated in a bonnet 12 so that the engine power is transmitted to the transmission case 9 as a belt. A steering handle 14 for steering the front wheels is provided above the rear part of the driving part 13, and a driver seat 15 is provided at the rear part of the traveling machine body 3. A driving step 16 is provided at the foot between the driving unit 13 and the driver seat 15, and a fender portion 17 that is raised upward on the left and right sides of the driver seat 15 is provided.

  The seedling planting device 4 mounts six seedlings in parallel, cuts seedlings one by one from the lower end of the seedling platform 21 and the seedling platform 21 that are reciprocated left and right by a set stroke, and plantes them on the field. 6 sets of rotary planting mechanisms 22 and 3 ground leveling floats 23 arranged in parallel on the left and right sides to level the planting area. The work taken out from the rear of the mission case 9 Power for use is transmitted to the seedling planting device 4 via the telescopic transmission shaft 24.

  The fertilizer application device 7 is mounted on the traveling machine 3 between the driver's seat 15 and the seedling planting device 4, and a fertilizer hopper 25 for storing powdered fertilizer and a set amount of fertilizer in the fertilizer hopper 25 are set. An unwinding mechanism 26 for unwinding and an electric blower 29 for wind-feeding the unloaded fertilizer to a groove forming device 28 provided on the leveling float 23 via a supply hose 27 are provided.

  The operation step 16 is formed by pressing a metal plate material. A front end portion of the operation step 16 extends to the left and right of the driving portion 13, and a rear portion of the operation step 16 is connected to a fender portion 17. The front part of the driving step 16 is connected to the front frame 11 via a stay 31 and the front and rear intermediate parts of the driving step 16 extend left and right from the transmission case 9 as shown in FIG. It is connected to the portion 9a via a stay 32. As shown in FIGS. 5 and 6, a support frame 33 is erected from the rear part of the mission case 9, and the front end of the link mechanism 6 and the fertilizer 7 are supported by the support frame 33, and a fender is provided above the support frame 33. The part 17 is connected and supported.

  On both the left and right sides of the driving step 16, an auxiliary step 35 that is elongated in the front and rear direction is provided above the front wheel 1 so that the feet of the driving unit are extended to the left and right. The auxiliary step 35 is resin-molded into a slat-like shape, and the planar shape of the front half of the auxiliary step 35 is formed in a tapered shape in which the outer side is inclined toward the inside of the machine body. The front wheel 1 can be seen through.

  As shown in FIGS. 3 and 4, the auxiliary step 35 is disposed inside a peripheral frame 36 made of a round pipe material, and is screwed to a support frame 37 provided in the peripheral frame 36. Is connected to and supported by the traveling machine body 3 as follows.

  As shown in FIG. 7, the front portion of the support member 37 provided on the peripheral frame 36 is connected to the end portion of the axle case 9a via a stay 38, and as shown in FIGS. The rear portion of the support member 37 is bolted to an extended end portion of a support frame 39 that extends obliquely upward from the mission case 9 toward the laterally outward direction. This support frame 39 is bent and formed into an arcuate shape in which a round pipe material is recessed upward, and brackets 39a provided at the left and right center portions thereof are bolted to two left and right locations at the lower end of the rear end of the transmission case 9. ing.

  As shown in FIGS. 3 and 5, the rear portion of the peripheral frame 36 extends rearward and upward from the auxiliary step 35, and the extended end thereof is connected to the end portion of the stay 33 a provided continuously with the upper portion of the support frame 33. In addition, a step 40 having a sheet metal press structure is connected to the extending end of the peripheral frame 36 higher than the auxiliary step 35. This step 40 is used when the seedling is replenished to the seedling table 21, and the driver stands on the rear part of the auxiliary step 35 and the step 40 to the end of the seedling table 21. It is in a state where it can be reached. A step 42 for getting on and off is provided at the lower end of a U-shaped support rod 41 extending downward from the rear portion of the peripheral frame 36.

  As shown in FIG. 8, the preliminary seedling setting table 8 is attached to the tip of a support arm 45 extending laterally outward from the front frame 11, and stands upright and swingable around a fulcrum a. A support frame 48 provided with seedling support plates 47 in three upper and lower stages is mounted on an upper portion of the support column 46 so as to be swingable back and forth around the fulcrum b. The support frame 48 is integrated with the upper link 51 of the four-link mechanism 50 having the support 46 and the auxiliary link 49 as opposed links, and the seedling support plate 47 is interlocked with the support 46 swinging back and forth. The support frame 48 is moved forward or backward while maintaining a substantially horizontal position so that the seedling can be replenished to the seedling support plate 47 or the seedling can be easily removed from the seedling support plate 47 by the driver. Has been.

  The support column 46 is arranged so as to enter the inside of the machine body from the outermost lateral side of the auxiliary step 35 at the laterally outer portion of the narrowed portion of the auxiliary step 35, and the preliminary seedling setting table 8 is projected outward. It is suppressed. The support column 46 is supported so as to be fixed at three positions of a standing posture shown in FIG. 1, a forward swinging posture shown in FIG. 8 (a), and a rearward swinging posture shown in FIG. 8 (b). A long lock operation shaft 52 is provided before and after releasing the fixation. A handle 52a is formed in a lateral direction before and after the lock operation shaft 52, and the lock is released by rotating the operation tool 51 around the operation shaft axis with either of the front and rear handles 52a. The preliminary seedling setting table 8 can be swung back and forth by pushing it back and forth as it is. As shown in FIG. 3, the support arm 45 that stands and supports the preliminary seedling setting table 8 also functions as a member that supports the front portion of the support frame 37 of the peripheral frame 36 for attaching the auxiliary step.

  [Other Examples]

  (1) The support frame 39 may be composed of two left and right members and separately connected to the mission case 9 for implementation.

  (2) In the model equipped with the seedling planting device 4 of the five-row planting specification, the axle case portion 9a is shortened in accordance with the reduction of the front wheel tread, so as shown in FIG. The driving step 16 and the axle case portion 9a are connected and supported by the stay 32 that connects the driving step 16 and the axle case portion 9a.

  (3) The preliminary seedling setting table 8 that can be moved back and forth can be configured and implemented as shown in FIG. In this preliminary seedling table 8, a four-link mechanism 50 includes a pair of front and rear columns 46 pivotally connected to a fixed frame 55 so as to swing back and forth, and a support frame 48 provided with a plurality of seedling support plates 47. The column 46 at the rear of the machine body is oscillated and biased to a standing posture by a gas spring 53, and a lock mechanism 54 is provided at the bottom of the column 46. The lock mechanism 54 is configured to lock an engagement hole 58 of a lock arm 57 pivotally supported on a lower part of a support column on a lock pin 56 provided on the fixed frame 55. The lock arm 57 is oscillated and biased in the engagement lock direction by a torsion spring 59 provided at the fulcrum c, and the lock arm 57 is operated by depressing the lock release pedal 60 extending rearward from the lock arm 57. The lock mechanism 54 can be unlocked by swinging up and swinging 57. In this unlocked state, when the quadruple link mechanism 50 is pushed to the front limit against the gas spring 53 and the depression of the unlock pedal 60 is released, the lock mechanism 54 is locked as shown in FIG. Thus, it is possible to lock the reserve seedling setting table 8 in the seedling receiving posture protruding to the front of the machine body. In addition, when the unlocking pedal 60 is depressed in this seedling receiving posture to release the unlocking, the four-link mechanism 50 is automatically returned rearward by the gas spring 53, and when the four-link mechanism 50 returns to the rear limit, the unlocking pedal 60 is restored. 11 is released, the lock mechanism 54 is locked, and the reserve seedling platform 8 can be fixed in the stowed retracted posture.

Overall side view of riding rice transplanter Overall plan view of the riding rice transplanter Exploded plan view of auxiliary step mounting structure Rear view of auxiliary step mounting structure Rear view showing part of the auxiliary step mounting structure Side view showing connecting and fixing part of supporting frame for attaching auxiliary step Front view showing the mounting structure of the front part of the auxiliary step in the 6-row planting specification Side view of spare seedling platform Front view showing the mounting structure of the front part of the auxiliary step in the 5-row planting specification Side view of spare seedling platform in another embodiment The side view which shows the locking mechanism of the reserve seedling stand in another Example

Explanation of symbols

3 traveling machine body 4 seedling planting device 8 spare seedling table 9 mission case 16 operation step 35 auxiliary step 39 support frame 46 support column

Claims (4)

In the riding type rice transplanter, which is connected to the rear part of the traveling machine body so that the seedling planting device can freely move up and down, and the auxiliary step is extended and deployed on the lateral side of the driving step in the traveling machine body,
A riding type rice transplanter characterized in that a support frame is extended obliquely upward from the lower part of the transmission case to the laterally outward direction, and the auxiliary step is connected and supported to the extended end of the support frame. .   The riding type rice transplanter according to claim 1, wherein a central portion of the support frame is connected to a transmission case, and the left and right auxiliary steps are connected and supported at left and right extending ends of the support frame.   The planar shape of the front part in the auxiliary step is formed in a tapered shape whose outer side is inclined toward the inside of the aircraft body, and the spare seedlings are placed and accommodated in a plurality of stages in the laterally outward part of the tapered part. The riding type rice transplanter according to claim 1 or 2, wherein a stand for the spare platform is installed upright.   The riding type rice transplanter according to claim 3, wherein the prop of the reserve seedling support table is configured to be tiltable back and forth.

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