JP2695573B2 - Seedling planting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION In the present invention, power is transmitted from a power take-off shaft on the side of a traveling machine body to a lateral drive shaft via a feed case, and from the drive shaft, a plurality of planting cases are used. The present invention relates to a seedling planting device configured to drive a plurality of planting mechanisms arranged in parallel in the lateral direction on the rear side of the plant.

[0002]

2. Description of the Related Art In the above-described seedling planting apparatus, conventionally, for example, as disclosed in Japanese Utility Model Laid-Open No.
A plurality of planting cases are connected and connected to the left and right sides of the feed case via pipe-shaped relay frames, and the laterally-directed drive shaft is provided inside each relay frame.

[0003]

However, in the above-mentioned conventional structure, the spacing between the planting strips is required to be a predetermined width, so that the spacing between the planting cases is widened and the relay frame has to be long. In addition, in order to have a structure that can be shared by models with different numbers of planting strips, and to make it easier to assemble the drive shaft, a structure in which the relay frame and the planting transmission case are detachably connected is adopted. However, since there are a plurality of connecting portions in a column along the lateral direction of the body, there is a disadvantage that connecting errors at the time of assembly are accumulated and become large.
Further, since the seedling planting device is provided with a heavy seedling stand and the seedling stand moves back and forth from side to side, the laterally long connecting frame portion is easily bent and deformed by one side load. However, as described above, since the frame has a joining structure, the frame strength has a certain limit, and there is room for improvement. An object of the present invention is to provide a seedling planting device that solves the above-mentioned problems due to a rational frame structure and is easy to share with models having different numbers of planting rows.

[0004]

According to a characteristic configuration of the present invention, in the seedling planting apparatus described at the beginning, a pipe-shaped main frame extending in the lateral direction is provided, and the feed case is connected at two left and right connecting portions. In addition to connecting and fixing to the main frame, each of the planting cases is connected and fixed to the main frame in a cantilever manner, and the lateral drive shaft is disposed on the outer side of the main frame, and the drive shaft and The input shaft of the planting case located in the middle of the connecting part is configured to be connectable and separable via a coupling, and the distance between the connecting part on the opposite side of the coupling disposing part and the end face of the planting case is set to the above The point is that it is set larger than the occlusal allowance of the coupling.

[0005]

[Function] At the time of assembly, the main frame is
It is only necessary to mechanically connect the feed case for power transmission from the fuselage side to each planting case separately, and then the drive shaft is mounted on the outer side of the main frame to configure the transmission system it can. Therefore, since the main frame only mechanically connects and supports the feed case for power transmission from the machine body side and each planted case,
Even if it is constituted by an integral structure over the entire width without being restricted by the shape, no trouble such as assembly of the power transmission system occurs. or,
Even in the case of being integrally formed for a long time as described above, the weight can be reduced by forming the pipe shape. The power takeoff shaft from the machine side to the feed case is located at the center in the machine width direction due to the rolling structure of the seedling planting device, etc., but depending on the number of planting lines, the center case is arranged in the center in the width direction. If it is necessary to do so, it is necessary to arrange the feed case and the case with the plant in a laterally overlapping position. As a result, the feed case is mounted and supported on the main frame at two places on both the left and right sides, avoiding the planting case, but the feed case coupling part on the opposite side to the feed case and the planting case. Since the interval is set larger than the occlusal allowance of the coupling, when removing the planting case in order to change the specification to a model with a different number of threads, disconnect the planting case from the main frame, When the planted case is laterally displaced, the coupling can be disengaged and the coupling can be easily separated.

[0006]

As a result, the main frame can be constructed as a strength member having a sufficient supporting strength without any consideration of its shape and workability of assembling, and the assembling error is caused by the connecting portion of each case to the main frame. The frame structure is configured to minimize the occurrence of errors, and the ratio of the mounting structure of the planting case located at the center in the left-right direction is rationalized. With such a configuration, it is possible to provide a seedling planting device that can easily cope with a specification change such as changing the mounting position of the planting case to change the number of planting rows.

[0007]

Embodiments will be described below with reference to the drawings. FIG.
Shows a seedling planting apparatus. This seedling planting apparatus comprises a seedling stand 1 on which seedlings for planting are placed and which reciprocate and reciprocate at a constant stroke, and six planting mechanisms for picking and planting seedlings one by one from a lower end of the seedling stand 1. It is provided with two or three leveling floats 3 and the like, and is connected to a rear part of a riding type traveling body (not shown) via a link mechanism 4 so as to be able to move up and down and to roll freely around the longitudinal axis Y. Next, the frame structure of the seedling planting apparatus will be described. As shown in FIG. 5, a feed case 6 is attached to a pivotal boss portion 5 formed on the rear link 4a of the link mechanism 4 so as to be relatively rotatable around a longitudinal axis Y, and a square pipe is provided below the feed case 6. The main frame 7 in the shape is bolted and connected. The main frame 7 extends in the lateral direction over almost the entire width, and is integrally formed by pultrusion of an aluminum material. Power is transmitted to the feed case 6 from the traveling machine body side via a power take-off shaft 8, and this power is transmitted to the lateral feed drive mechanism of the seedling stand 1 and the planting mechanisms 2 installed in the case 6. It is configured to supply. And
3 on the rear side of the main frame 7 with a predetermined gap.
The individual planting cases 9 are connected in a cantilevered manner to the rear by bolts, and the planting mechanisms 2 are respectively arranged on the left and right sides of the rear part of each planting case 9 to form a six-row planting. There is. That is, the chain transmission mechanism 10 installed in each planting case 9
The rotary case 11 is rotationally driven via the rotary case 11, and the tip of the planting claw 12 attached to both ends draws an almost elliptical locus by a cam mechanism (not shown) provided in the case 11 as the rotary case 11 rotates. Planting mechanism 2 to move up and down while
Is configured. Then, as shown in FIG. 6, the front-back power of the power take-off shaft 8 is transmitted to the lateral input shaft 14 via the bevel gear mechanism 13 in the feed case 6, and the power is vertically transmitted from the input shaft 14 via the gear mechanism. The feed drive shaft 15 is configured to be driven, and power is transmitted from the vertical feed drive shaft 15 to a lateral drive shaft 17 located outside and rearward of the main frame 7 via a transmission chain 16. The drive shaft 17 extends leftward and rightward at an outer portion on the rear side of the main frame 7 and is interlockingly connected to the front sprocket 10a of each planting case 9 so as to be able to transmit torque. In this manner, the power is branched and transmitted from the feed case 6 to each planting mechanism 2 via the lateral drive shaft 17. A cylindrical shaft 18 parallel to the input shaft 14 is supported in the feed case 6, and one end of the cylindrical shaft 18 is used for lateral feeding of the seedling placing table 1 arranged laterally outside the feed case 6. The screw shaft 19 is configured to be inserted and connected so that torque can be transmitted, and the bearing bracket 20 of the screw shaft 19 is bolted to the side surface of the feed case 6. Then, between the input shaft 14 and the cylinder shaft 18, a seedling-picking number shifting mechanism 21 is configured which can shift the relative lateral feed speed of the seedling placing table 1 with respect to the planting mechanism 2 in four steps. That is, the four driven gears that engage with the drive gears are externally fitted to the cylinder shaft 18 so as to be rotatable relative to each other, and the operation shaft 23 provided inside the cylinder shaft 18 is provided outside the other end side. By operating the rotary shaft 24, the operation shaft 23
A ball 25 is configured to selectively shift the cylinder shaft 18 and a driven gear in an interlocking state by a cam 25 formed by shifting the phase. As shown in FIG. 7, a reciprocating spiral groove 27 is formed on the outer peripheral surface of the screw shaft 19, and a top member 28 engaging with the spiral groove 27 is externally fitted to the screw shaft 19. 28 is interlockingly linked to the seedling placing base 1 via a connecting tool 29, and the seedling placing base 1 is reciprocally moved laterally by rotationally driving the screw shaft 19. Further, the other end portion of the screw shaft 19 is supported by a bracket 30 fixedly erected from the main frame 7. All of the planting cases 9 are formed in the same shape so that parts can be shared. The bearing holes of the lateral drive shafts 17 in the left and right planting cases 9 are covered with a cover 31. As shown in FIG. 3, each planted case 9 has its flange portion 9a bolted to the rear surface 7a of the main frame 7 in a cantilevered manner, and at the top of the connection end surface of each planted case 9 there is a hook-shaped engagement. The hook-shaped locking portion 9 is formed by forming the stopper 9b.
B is hooked and locked on the upper surface 7b of the main frame 7, and at the time of assembly, the hook-shaped locking portion 9b is used to temporarily position and position the bolt so that bolting work can be performed easily. As shown in FIG. 2, the feed case 6 includes an upper surface 7b and a rear surface 7a of the main frame 7.
They are connected and fixed by bolts while straddling each other.
In other words, the mounting surface of the feed case 6 is formed in a substantially L shape, and is bolted to the upper surface 7b and the rear surface 7a of the main frame 7, respectively, so that the rigidity of the frame structure is enhanced. Further, the plate-like support member 32 is connected by bolts over the front wall portion of the feed case 6 and the front surface portion of the main frame 7 so as to increase the rigidity at the rolling fulcrum point that supports the entire seedling planting device. There is. And the planting case 9 located in the middle in the lateral direction
Are arranged at the lateral body center position because the planting mechanisms 2 are present on both the left and right sides. Moreover, the rolling axis Y of the feed case 6 is located at the lateral center of the body, and the feed case 6 and the planting case 9 are arranged. As shown in FIG. 4, the feed case 6 is configured to be connected to the main frame 7 by connecting portions 6a and 6b on the left and right sides avoiding the planting case 9. The input shaft 10b of the planted case 9 and the lateral drive shaft 17 are connected via a coupling 33 so as to be connectable and separable. The distance L1 between the connecting portion 6b on the opposite side of the coupling arrangement portion and the end face of the planting case 9 is set to the coupling 33
It is set to be larger than the occlusal allowance L2. With this configuration, for example, when changing the specification of the number of planting lines to five, the planting case 9 is removed and the mounting position for five lines [shown in phantom in FIG. 4] is used. At the time of replacement, if the connection of the planting case 9 to the main frame 7 is released and the slide is performed in the lateral direction, the engagement of the coupling 33 can be released and the coupling 33 can be easily removed.

The main frame 7 is not limited to the rectangular pipe shape, and may have any shape such as a round tube shape or a triangular tube shape.

In the claims, reference numerals are provided to facilitate comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a side view of a seedling planting apparatus.

FIG. 2 is a side view of a feed case mounting portion.

[Fig. 3] Side view of the planted case attachment part

FIG. 4 is a rear view of the feed case mounting portion.

FIG. 5 is a plan view showing a transmission system.

FIG. 6 is a sectional view of a feed case.

FIG. 7 is a front view showing a drive structure of a seedling stand.

[Explanation of symbols]

 2 Planting mechanism 6 Feed cases 6a, 6b Connecting part 7 Main frame 8 Power extraction shaft 9 Powering case 10b Input shaft 17 Drive shaft 33 Coupling L1 spacing L2 Occlusal allowance

Claims (1)

(57) [Claims] 1. Power is transmitted from a power take-off shaft (8) on the traveling body side to a lateral drive shaft (17) through a feed case (6), and the drive shaft (17) causes a plurality of planted cases (9). ) Is a seedling planting device configured to drive a plurality of planting mechanisms (2) laterally arranged in parallel on the rear side of each planting case (9) via A pipe-shaped main frame (7) is provided, and the feed case (6) is connected to left and right connecting portions (6a), (6).
While connecting and fixing to the main frame (7) in b),
Each of the planting cases (9) is cantilevered and fixed to the main frame (7), and the lateral drive shaft (17) is arranged on the outer side of the main frame (7) to drive the drive. The shaft (17) and the input shaft (10b) of the planting case (9) located in the middle of the connecting portions (6a) and (6b) are configured to be connectable and separable via a coupling (33), The distance (L1) between the connecting portion (6b) on the opposite side of the coupling (33) arrangement portion and the end face of the planting case (9) is made larger than the occlusal allowance (L2) of the coupling (33). The set seedling planting device.