JP3167672B2 - Riding rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an entire structure of a seedling planting apparatus in a riding type rice transplanter.

[0002]

2. Description of the Related Art As a whole structure of a seedling planting device in a riding type rice transplanter, for example, as disclosed in Japanese Utility Model Laid-Open Publication No. 62-99914, a planting arm for planting seedlings on a rice field (see the above publication). By providing 3) in FIG. 1 at the rear of the planting case (7a, 7b in FIG. 1 of the aforementioned publication), a plurality of planting cases corresponding to the number of planting strips of the riding type rice transplanter are prepared. In some cases, the entire seedling planting device is configured by connecting a plurality of planting cases with a plurality of pipe members (8a and 8b in FIG. 1 of the above-mentioned publication).

[0003]

In recent years, the number of rotary-type seedling planting apparatuses provided with a plurality of planting arms (see FIGS. 3 and 4) per one planting strip has increased, and with this, the seedling planting apparatus has been increased. The overall weight of the attachment device is increasing. Therefore, in the riding type rice transplanter, since the right and left central portions of the seedling planting device are supported by the link mechanism of the traveling body, as described above, when the entire weight of the seedling planting device becomes heavy, the The bending moment for bending the entire body in the left-right direction increases.

On the other hand, the aforementioned Japanese Utility Model Application Laid-Open No. 62-99914.
As described in Japanese Patent Application Laid-Open Publication No. H10-209, the connection between a plurality of planting cases is connected by a plurality of pipe members. It becomes a state of being lined up (see FIG. 1 of the above-mentioned publication), and a bending moment for bending the entire seedling plant in the left-right direction is applied to each of the connecting portions between the end surface of the pipe member and the lateral surface of the planting case. As a result, there is room for improvement in securing the overall strength of the seedling planting apparatus.

[0005] In addition, since a connection error in the left-right direction is likely to occur at the connection between the end face of the pipe member and the lateral face of the planting case, as described in Japanese Utility Model Application Laid-Open No. 62-99914 described above. If the configuration is such that a plurality of planting cases are connected by a plurality of pipe members, the connection errors described above are accumulated along the left-right direction, and an error occurs at the positions of the right and left planting arms. There is. An object of the present invention is to provide a riding-type rice transplanter that ensures the strength of the entire seedling planting device and suppresses the occurrence of errors in the positions of the right and left planting arms. The purpose is to support appropriately.

[0006]

SUMMARY OF THE INVENTION A feature of the present invention is that a riding type rice transplanter is configured as follows. [1] A plurality of vertically long planting cases having a planting arm for rearing a seedling on a rice field surface with a planting arm for planting seedlings on a rice field arranged rearward in a horizontal direction are cantilevered in parallel to each other. The right and left outermost planting cases are located inside the right and left ends of the horizontal frame, and transmitted from the traveling machine. An output section for outputting power is arranged between adjacent planting cases and on the rear side of the horizontal frame so that the power of the output section is transmitted to the adjacent planting case outside the rear side of the horizontal frame. A power transmission shaft for transmitting power between the planting case, which is located on the lateral outer side opposite to the output unit with respect to the adjacent planting case, and the adjacent planting case, is provided on the rear side of the horizontal frame. After the link mechanism provided at the rear of the traveling aircraft At the lower part, the horizontal frame is supported so as to freely roll around the longitudinal axis.

[2] In the configuration of [1], the planting case is directly attached to and supported by the horizontal frame.

[3] In the configuration of [1] or [2], the transmission shaft is arranged in parallel with the horizontal frame.

[0009]

According to the first aspect of the present invention, a plurality of horizontally-long horizontal frames are arranged along the left-right direction, and a plurality of vertically-long plantings in the front-rear direction are provided with planting arms for planting seedlings on a rice field. The case is
Since it is connected to the horizontal frame in a cantilever manner in a rearward direction parallel to each other, a bending moment for bending the entire seedling plant in the left-right direction is applied to the horizontal frame.

In this case, there are many connecting portions between the end face of the pipe member and the lateral face of the planting case along the left-right direction as in the configuration of Japanese Utility Model Application Laid-Open No. 62-99914 described in "Prior Art". Since the state of being lined up does not occur in the horizontal frame according to the feature of claim 1, even if a bending moment for bending the entire seedling plant in the left-right direction is applied to the horizontal frame, the horizontal frame is not affected. Can withstand enough.

[0011] In the horizontal frame according to the first aspect of the present invention, unless a state occurs in which a large number of connecting portions between the end surface of the pipe member and the horizontal surface of the planting case are arranged in the left-right direction.
The state in which the left and right connection errors occurring at the connection between the end face of the pipe member and the lateral surface of the planting case are accumulated along the left and right directions does not occur in the horizontal frame. Does not cause an error in the positions of the right and left planting arms.

[II] According to the features of the first aspect, the plurality of planting cases are arranged so that the right and left outermost planting cases are located inside the right and left ends of the horizontal frame. Are connected to the horizontal frame, so if there is an obstacle near the right or left end of the horizontal frame, even if the right or left end of the horizontal frame may hit the obstacle, And the outermost planting case on the left is less likely to hit an obstacle.

[III] When configuring a transmission system to a plurality of planting cases, according to the configuration of Japanese Utility Model Application Laid-Open No. 62-99914 described in "Prior Art", a plurality of planting cases are connected. A transmission shaft is arranged inside the pipe member so as to transmit power to each of the plurality of planting cases. Accordingly, the connection between the end surface of the pipe member and the lateral surface of the planting case and the connection of the transmission shaft are performed at the same place, so that the structure is complicated and maintenance work is also difficult. . When the bending moment for bending the entire seedling plant in the left-right direction is applied to the pipe member as described in [I] above, the above-described bending moment is also applied to the transmission shaft. Therefore, there is a possibility that fatigue of the transmission shaft and wear of bearings supporting the transmission shaft may be developed.

According to the first aspect of the present invention, when forming a transmission system to a plurality of planting cases, an output portion for outputting power transmitted from the traveling body is provided between adjacent planting cases and in a horizontal frame. And the power of the output unit is transmitted to the adjacent planting case outside the rear side of the horizontal frame. A transmission shaft for transmitting power is installed outside the rear side of the horizontal frame between the planting case located on the lateral outer side opposite to the output unit with respect to the adjacent planting case and the adjacent planting case. ing.

According to the first aspect of the present invention, since the planting case is continuously connected to the horizontal frame and the power is transmitted to the planting case separately, the structure is simplified and the maintenance work is easy. Becomes Also, as described in the preceding item [I], even if a bending moment for bending the entire seedling plant in the left-right direction is applied to the horizontal frame, the bending moment is directly applied to the transmission shaft and the output unit. Therefore, it is possible to avoid fatigue of the transmission shaft and the output portion and wear of bearings and the like that support the transmission shaft.

[IV] According to the feature of the first aspect, the output part for outputting the power transmitted from the traveling body is arranged between the adjacent planting cases as described in the above item [III]. Thus, according to the features of claim 1, the output unit does not come out from the left and right range of the seedling planting device in the lateral outside in plan view, and the output unit can be arranged on the left and right center side of the seedling planting device. Therefore, when transmitting power from the traveling aircraft to the output unit, it is impossible to direct the transmission shaft from the traveling aircraft to the output unit without configuring the transmission shaft from the traveling aircraft to turn to the side. It can be arranged without.

[V] According to the feature of the first aspect, in the riding type rice transplanter, a horizontal frame is supported around a longitudinal axis at a rear lower portion of a link mechanism provided at a rear portion of the traveling body in a freely rolling manner. . In this way, by supporting the horizontal frame at the rear lower part of the link mechanism around the front and rear axis center so that it can roll freely,
While setting the position of the center of gravity low, the entire seedling planting apparatus can be stably supported by the link mechanism in a freely rolling manner.

[VI] According to the feature of the second aspect, similar to the case of the first aspect, the "action" described in the above-mentioned [I] to [V] is provided, and in addition to this, the following " Action ". According to the second aspect of the present invention, the planting case is directly attached to and supported by the horizontal frame, so that the structure for attaching the planting case to the horizontal frame can be simplified.

[VII] According to the feature of claim 3, similar to the case of claim 1 or 2, the "action" described in the above items [I] to [VI] is provided. It has various “actions”.
According to the third aspect of the present invention, the transmission shaft for transmitting power to the planting case is installed on the planting case in parallel with the horizontal frame outside the rear side of the horizontal frame. When the transmission shaft is arranged in parallel with the horizontal frame in this way, the transmission shaft is compactly arranged throughout.

[0020]

According to the first aspect of the present invention, in the seedling planting apparatus of the riding type rice planting machine, the whole seedling planting apparatus can be left and right by connecting the planting cases to the horizontal frame in a cantilever manner. It was possible to sufficiently withstand the bending moment in the bending direction, thereby improving the overall strength of the seedling planting apparatus. According to the features of the first aspect, it is possible to avoid a state in which the connection errors in the left-right direction are accumulated along the left-right direction, and to accurately set the positions of the right and left planting arms. became.

According to the first aspect of the present invention, the right and left outermost planting cases are located inside the right and left ends of the horizontal frame. The contact of the planting case with the obstacle can be reduced, and the damage of the outermost planting cases on the right and left sides can be reduced.

According to a feature of the present invention, an output portion disposed between adjacent planting cases and on the rear side of the horizontal frame.
A transmission shaft installed outside the rear side of the horizontal frame separates connection of the planting case to the horizontal frame and transmission of power to the planting case, thereby simplifying the structure and facilitating maintenance work. I was able to. Furthermore, since the bending moment which tries to bend the whole seedling planting apparatus in the left-right direction can be avoided from being directly applied to the transmission shaft and the output unit, the transmission shaft and the output unit are supported by fatigue and the transmission shaft. Wear of bearings and the like can be avoided, and the durability of the transmission system of the seedling planting device can be improved.

According to the first aspect of the present invention, the output portion for outputting the power transmitted from the traveling machine body is disposed between the adjacent planting cases, so that the output portion is provided on the left and right center sides of the seedling planting device. It becomes possible to arrange, and the transmission shaft from the traveling machine can be easily arranged toward the output unit, so that the transmission of power from the traveling machine to the output unit and the planting case can be smoothly performed. As a result, power transmission efficiency was improved.

According to the first aspect of the present invention, the entirety of the seedling planting apparatus is supported by setting the position of the center of gravity low by supporting the horizontal frame at the rear lower portion of the link mechanism around the longitudinal axis. Since the rolling can be stably supported by the link mechanism, the planting operation of the seedling planting device can be stably performed, and the planting performance of the seedling planting device can be improved. .

According to the feature of the second aspect, the "effect of the invention" of the first aspect is provided similarly to the case of the first aspect, and in addition to the "effect of the invention", the following "invention" is provided. Of the effect. Since the planting case is directly attached to and supported on the horizontal frame as in the feature of the second aspect, the mounting structure of the planting case to the horizontal frame can be simplified, so that the seedling can be formed. The overall configuration of the planting device could be simplified and lightened.

According to the feature of claim 3, claim 1 or 2
"Effects of the Invention" of Claim 1 or 2 as in the case of
In addition to this “effect of the invention”, the following “effect of the invention” is provided. According to the third aspect of the present invention, the transmission shaft is mounted on the planting case outside the rear side of the horizontal frame and parallel to the horizontal frame, so that the transmission shaft is compactly arranged throughout. Thus, the whole seedling plant can be made compact.

[0027]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 4 shows a riding rice transplanter of the present invention. This riding type rice transplanter is configured by connecting a seedling planting device 4 to a rear portion of a traveling machine body 3 supported by a front wheel 1 and a rear wheel 2 via a quadruple link mechanism 5 (see FIG. 3). .

As shown in FIG. 3, the seedling planting device 4 has a transmission case 6 to which power from the traveling machine body 3 is input, and a power transmitted from the transmission case 6 to move the planting arm 7 for each planting line. A plurality of planting cases 8 supported at the rear end so as to be rotatable, a horizontal frame 9 supporting the planting cases 8 and the transmission case 6,
The seedling rest 10 is reciprocally driven left and right by a lateral feed screw (not shown) provided in the transmission case 6 so that a large number of rows can be planted.

Next, the frame structure of the seedling planting apparatus 4 will be described. As shown in FIGS. 3 and 4, the transmission case 6 is rotatable (rollable) around the front-rear axis X below the pivot boss 11 formed on the rear link 5 a of the quadruple link mechanism 5. The horizontal frame 9 in the shape of a square pipe is supported by a lower portion of the transmission case 6 with bolts. When the transmission case 6 is connected to the left and right centers of the horizontal frames 9, the horizontal frames 9 extend in the left and right direction over the entire width of the traveling body 3.

As shown in FIG. 3 and FIG.
Power is transmitted from the traveling machine body 3 via a power transmission shaft 12, and a plurality of planting cases 8 that are vertically long in the front-rear direction are arranged parallel to each other at a predetermined interval on the rear surface side of the horizontal frame 9. It is attached in a cantilever shape in a backward direction.
As shown in FIGS. 1, 3, and 4, the transmission of power from the transmission case 6 to the planting case 8 is performed by extending from the right end of the transmission case 6 to the rear lower portion and laterally between the adjacent planting cases 8. The output shaft 13 protruding from the left and right ends of the output case portion 6a located on the rear side of the frame 9 and the planting input shaft 14 along the left and right directions of the planting case 8 are arranged concentrically and spline-fitted. The connection is carried out in an interlocking manner by a connecting tool 15 to be combined and a transmission shaft 16 arranged in parallel with the horizontal frame 9 outside the rear side of the horizontal frame 9.

As shown in FIG. 2C and FIG.
A structure is shown in which three planting cases 8 are attached to the horizontal frame 9 at intervals of twice the spacing L between the planting streaks, as shown in FIG. 2 (b) and (b). The structure of the five-row type and the four-row type is also provided with the transmission case 6 on the horizontal frame 9.
Are connected by the same frame structure of the same specification. As shown in FIG. 2 (c) and FIG.
In the case of the row planting type, one planting case 8 is attached to the horizontal frame 9 so that the left and right center of the planting case 8 and the left and right center of the horizontal frame 9 coincide with each other.
The planting cases 8 are attached to the right and left at an interval twice as long as the planting line interval L.

In the case of a four-row planting type as shown in FIGS. 2A and 1A, the planting cases are arranged on the left and right sides with a spacing of planting lines L from the left and right center of the horizontal frame 9. 8 are arranged. In the case of a five-row type as shown in FIG. 2B and FIG. 1, a half of the spacing L between the planting lines is determined from the position of the planting case 8 on the right side of the four-row type. The planting case 8 is located at a position on the right side at a distance of 1/2, and at a position on the left side at a distance of one-half of the planting line distance L from the position of the planting case 8 on the left side of the aforementioned four-row type. Are located.

As described above, as shown in FIG. 2C and FIG. 1, in the case of the six-row type, one planting case 8 is provided.
Are attached to the horizontal frame 9 so that the left and right centers of the planting case 8 and the left and right centers of the horizontal frame 9 match, and the right end face of the center planting case 8 and the left side of the output case portion 6a of the transmission case 6 The distance between the end face and the end face is set to a distance B to which the connector 15 can be attached. The lateral width C of the planting case 8, the lateral width A of the output case portion 6a, and the planting line interval L are configured to satisfy the following relationship. A ≦ L− (2B + C)

As a result, as shown in FIG. 1, another planting case 8 (the position of the planting case 8 is four-row planting) is set at a position away from the central planting case 8 to the right by the planting line interval L. (Refer to) corresponding to the position of the planting case 8 of the model type), it is necessary to provide at least the space B between the planting cases 8 and the output case portion 6a. Therefore, even if the left and right widths A and C are set to be the largest,
The arrangement configuration is such that an interval B enough to allow the connection tool 15 to be attached is at least secured on the left and right sides of the output case section 6a.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the structure shown in the accompanying drawings.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a positional relationship between a planting case arranged in accordance with a four-row planting type, a five-row planting type, and a six-row planting type, an output case part, and a horizontal frame.

FIG. 2 is a schematic plan view showing states of planting cases arranged corresponding to a four-row type, a five-row type, and a six-row type;

FIG. 3 is an overall side view of the seedling planting apparatus.

FIG. 4 is an overall plan view of a riding rice transplanter.

[Explanation of symbols]

 Reference Signs List 3 traveling machine body 4 seedling planting device 5 link mechanism 6a output unit 7 planting arm 8 planting case 9 horizontal frame 16 transmission shaft X front and rear shaft center

Continuation of front page (56) References JP-A-52-34212 (JP, A) JP-A-63-140813 (JP, U) JP-A-62-11376 (JP, Y2) (58) Fields investigated (Int) .Cl. ⁷ , DB name) A01C 11/02

Claims (3)

(57) [Claims] 1. A plurality of planting cases (8) which are arranged longitudinally in the left-right direction and have a planting arm (7) at the rear thereof for planting seedlings on a rice field. ) Are connected to the horizontal frame (9) in a cantilever manner in a parallel rearward direction, and are inward of the right and left ends of the horizontal frame (9).
The right and left outermost planting cases (8) are located
And an output unit for outputting power transmitted from the traveling vehicle body (3)
(6a) between adjacent planting cases (8) and
The output unit (6) is disposed behind the horizontal frame (9).
a) to the adjacent planting case (8)
The output unit (6) is configured to transmit the signal to the outside of the rear side of the frame (9) and to the adjacent planting case (8).
a planting case (8) located on the opposite lateral outer side to a);
A transmission shaft (16) for transmitting power is provided outside the rear side of the horizontal frame (9) between the adjacent planting case (8) and provided at a rear portion of the traveling body (3). At the lower rear part of the link mechanism (5), the horizontal frame (9) is
A riding rice transplanter that is freely rolled around. 2. The riding rice transplanter according to claim 1, wherein said planting case (8) is directly attached to and supported by said horizontal frame (9). 3. The riding rice transplanter according to claim 1, wherein said transmission shaft (16) is arranged parallel to said horizontal frame (9).