JPH06292421A - Float structure of rice transplanter for paddy field - Google Patents

Abstract

PURPOSE:To obtain a float structure capable of forming a drain ditch during transplanting operation without exerting an adverse influence on characteristic function of float caused by too much consideration of the following drainage such as deliberation of buoyance of furrow opening projection in design of float or insufficient manifestation of leveling action on the surface of mud. CONSTITUTION:A furrow opening plate 7 for forming a drainage ditch is attached to the bottom of the rear of a center float 3 of a planting part 2, the rear of the furrow opening plate 7 is projected backward from the rear of the float and made into a state of rising to a height level of the top of the float along a rear wall 3r of the float.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a float structure of a paddy field transplanter such as a strawberry transplanter and a rice transplanter, and more particularly to a technique for making a drainage groove well in accordance with the transplanting work.

[0002]

2. Description of the Related Art Strawberry seedlings and paddy rice seedlings make the field flooded to give abundant water at the time of transplantation. It is known that drying for a while promotes good growth. Therefore, it is effective to form a groove in the field in order to surely drain water even if the field has some irregularities. However, in the rice transplanter disclosed in Japanese Utility Model Laid-Open No. 1-130606. As described above, there is known a highly efficient means for integrally forming a drainage ditch forming projection on the bottom surface of the float and forming a drainage ditch at the same time as planting.

[0003]

In the structure disclosed in the above publication, the projection has a wide cross-sectional area of an inverted trapezoidal cross section and has a length substantially equal to the entire length of the float. In addition, since considerable buoyancy also occurs on the protrusions, this has to be taken into consideration when designing the float, and a large step is created on the bottom surface of the float, so that the mud surface can be leveled sufficiently. It tends to be difficult to exert. In other words, there is a strong possibility that the original function of the float will be hindered because the drainage property afterwards is taken into consideration, and there is room for improvement. An object of the present invention is to provide a float structure capable of forming a drainage groove during transplantation work without adversely affecting the original function of the float.

[0004]

In order to achieve the above object, the present invention is to install a drainage groove forming grooved plate on the bottom surface of the float rear portion of the planting portion, and
It is characterized in that it is formed so as to project rearward from the rear end of the float and rise up to the height level of the upper surface of the float along the rear wall of the float.

[0005]

[Function] In order to know the drainage quality depending on the formation state of the drainage groove, as a result of making a plurality of narrow drainage widths and making a test, it is sure that the wider drainage width makes drainage easier. , The difference between the narrow groove and the wide groove is much smaller than the difference with or without the groove, and even if the groove width is thin, that is, if the groove is present, good drainage performance is obtained. It was found to be obtained. Therefore, according to the above-mentioned characteristic configuration based on this new recognition, since the grooved plate is plate-shaped and has a narrow width, the volume of the portion protruding downward from the float is small. Therefore, the buoyancy-increasing component is small, and it is unlikely that the leveling action of the mud surface is deteriorated due to its small width. Also, since the rear part of the grooved plate is projected rearward from the rear end of the float and is raised upward to the level of the upper surface of the float, the groove can be formed even when the float is depressed to some extent and the float can pass through. Even after that, the groove forming action continues for a while. Therefore, by these synergistic effects, it becomes possible to surely form the groove even in a flooded field where the groove tends to be filled by the leveling function of the float.

[0006]

As a result, by narrowing the groove width formed in the field rather than by extending the groove cutting plate behind the float, a good drainage groove is formed without adversely affecting the float function. It was possible to provide a possible float structure.

[0007]

Embodiments of the present invention will be described below with reference to the drawings when applied to the float of a straw transplanter. Fig. 2 shows a strawberry transplanter, 1 is a lifting link mechanism,
Reference numeral 2 is a planting section, 3 is a center float, 4 is a side float, and 5 is a seedling stand, and the planting mechanism 6 sequentially plants strawberries in the field.

A center float 3 of the three floats arranged in parallel is shown in FIGS. 1 and 3, and a grooved plate 7 for forming a drainage groove is attached to the bottom surface of the rear part of the float, and the grooved plate 7 is formed. The rear portion is formed so as to project rearward from the rear end of the center float 3 and rise to the height level of the float upper surface 3u along the float rear wall 3r.
The front end of the grooved plate 7 is located in the vicinity of the suspension fulcrum P at the front-rear intermediate portion of the center float 3 and has a shape cut obliquely so that foreign matters are hard to attach. The grooved plate 7 has a lateral width of about 30 mm, and the mounting bolts 9 and 9 of the support bracket 8 having the float suspension fulcrum P are screwed into the pair of front and rear embedded nut portions 10 and 10 to float the float. It is a structure to be tightened together with 3. A recessed portion 3h for preventing the lateral movement of the groove plate 7 on the center float rear wall 3r
If the groove is formed, the grooved plate 7 can be favorably supported. still,
The grooved plate 7 may be attached to the left and right side floats 4.

FIG. 5 shows a transverse feed shaft 11 in a well-known transverse feed mechanism for moving the seedling placing table 5 back and forth along with planting.
It is shown. In this lateral feed shaft 11, a spiral groove 12 for reciprocating lateral feed is formed not on the forward groove 12s and the backward groove 12g, but slightly offset to the upstream side in the feeding direction. That is, as shown in FIG. 6 which shows the number of seedlings picked per row by lateral feeding of the seedling placing table, the seedling picking pitch at the left and right ends is intentionally changed to set the first pitch from the lateral end to the standard pitch p. The lateral feed pitch of the last time is set to p + α, and the lateral feed pitch of the final time is set to p−α. This is because seedlings are surely planted at a large pitch as shown in Fig. 4 in order to prevent the occurrence of stunting at the time of first seedling picking due to lateral displacement of seedlings due to inertia of lateral feeding. It's designed to be gripped by your nails.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

[Figure 1] Side view of planting part

[Fig.2] Side view of the strawberry transplanter

[Fig. 3] Rear view of the center float

[Figure 4] Plan view of the seedling stand

FIG. 5: Schematic diagram of a single horizontal feed shaft

FIG. 6 is a diagram showing seedling-picking pitch intervals.

[Explanation of symbols]

 2 Planted part 3 Float 3r Rear wall 7 Grooved plate

Claims (1)

[Claims] 1. A groove cutting plate (7) for forming a drainage groove is attached to a bottom surface of a rear portion of a float (3) of a planting portion (2), and a rear portion of the groove cutting plate (7) is attached to the float (3). 3) A float structure for a paddy transplanter, which is formed so as to project rearward from the rear end and rise along the rear wall (3r) of the float (3) to the height level of the float upper surface.