JPH11332336A - Sulky rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a sulky rice transplanter enabling good seedling transplantation even at the levee side, etc., possible to leave irregularity such as trail on the surface of field by placing a roller for leveling a mud face for plantation at a specific position. SOLUTION: A ground leveling roller 21 for leveling the mud face for plantation is positioned in front of a ground-leveling float 16B of a seedling transplanter for detecting the mud face position and between a pair of right and left wheels of the traveling machine body. The ground-leveling roller 21 is preferably attached to a long supporting frame 15 extending along the lateral direction and supporting a feed case 11 of the seedling transplanter and a transmission case 14 to transmit power to the seedling planting mechanism. The ground leveling roller 21 is preferably supported in a state freely swivelable in vertical direction around a horizontal axis and forced downward with a spring force in a state to restrict the lower limit of the swiveling motion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a riding type rice transplanter which is provided with a leveling float in a seedling planting apparatus, and after leveling with the leveling float, seedlings are planted.

[0002]

2. Description of the Related Art Conventionally, in a riding type rice transplanter of this type, the muddy surface before the seedlings are planted has been done only with a leveling float.

[0003]

By the way, in the central part of the field, there are few wheel marks caused by running and turning of the agricultural work vehicle, so that the terrain can be relatively well adjusted. Since the vehicle changes direction, there is a high possibility that irregularities such as wheel marks that may affect seedling planting remain in the field scene. Therefore, with the conventional riding type rice transplanter described above, the leveling near the ridge is not sufficient even after the usual padding, and when planting seedlings in that state, the seedlings are planted deeply or conversely shallowly. There was a high possibility that poor planting such as the occurrence of planting would occur.

[0004] The present invention has been made in view of the above circumstances, and it is possible to satisfactorily plant seedlings on ridges or the like where there is a possibility that unevenness such as wheel marks may remain in the field scene. The purpose is to provide a riding rice transplanter.

[0005]

(Structure) In a riding type rice transplanter according to a first aspect of the present invention, a leveling roller for leveling a planted mud surface is provided with a leveling float for detecting a mud surface position in a seedling planting apparatus. In front of the vehicle body and between the pair of left and right wheels of the traveling body.

(Operation) According to the configuration of claim 1 of the present invention, seedlings are planted after the soil is first leveled by the leveling roller, and then the leveling is performed by the leveling float. Since the surface is more leveled than simply leveling with only the leveling float, it is possible to avoid problems such as seedlings being deeply planted and conversely being shallowly planted. In addition, when the aircraft is running, the leveling rollers located between the wheels prevent the muddy water from flowing backward and push it out from the side edges of the leveling rollers. It is possible to suppress the collision and the hindrance of the seedling planting. In addition, it is conceivable to provide a rake as a structure capable of leveling separately from the leveling roller.However, in the case of a rake, there is a high possibility that impurities on the field will be caught by the teeth of the rake, and the leveling function is performed by the caught by the impurities. Although there is a risk that the foreign matter will not be caught by such a leveling roller, even if it gets stuck on the roller, the foreign matter is released during the leveling. It is easy to be done.

(Effects) Therefore, according to the configuration of the first aspect of the present invention, by a simple modification of disposing a leveling roller in front of a leveling float, a relatively rough place in a field scene such as a ridge is provided. In the case of planting seedlings, seedlings can be satisfactorily planted while suppressing the problem that seedlings can be planted deeply or shallowly.

(Structure) A riding type rice transplanter according to a second aspect of the present invention is the riding type rice transplanter according to the first aspect, wherein the leveling roller is transmitted to a feed case and a seedling planting mechanism in the seedling planting apparatus. It is characterized in that it is provided on a support frame configured to be long along the left-right direction for supporting the case.

(Operation) According to the configuration of the second aspect of the present invention, since the leveling roller is provided on the support frame of the seedling planting apparatus, the leveling roller is interlocked with the rolling and lifting of the planting apparatus. The rollers are also displaced, and the support strength of the leveling roller can be increased by providing the leveling roller on the support frame that is a strength member.

(Effects) Therefore, according to the configuration of the second aspect of the present invention, the posture of the ground leveling roller is changed in conjunction with the change of the posture of the seedling planting device, so that the ground level and the planting location are different. In addition, it is possible to prevent a tilt-like displacement from occurring, and it is possible to maintain a high level of support strength of the leveling roller.

(Structure) According to a third aspect of the present invention, there is provided a riding type rice transplanter according to the first or second aspect, wherein the leveling roller is vertically swingably supported around a horizontal axis. The leveling roller is elastically urged downward in a state where a lower limit of the swing is set.

(Operation) According to the third aspect of the present invention, the leveling roller is supported so as to be able to swing up and down around the axis of the horizontal axis, and sets the lower limit of the swinging of the leveling roller. And is elastically biased downward,
For example, even if there is a stone in the mud and the ground leveling roller comes into contact with the stone, the ground leveling roller escapes upward against the downward biasing force, thereby avoiding a strong collision with the stone. The roller can be prevented from being damaged or damaged, and does not swing downward without any limitation.Because the leveling roller can only swing to a certain lower limit position, it is not affected by the change in mud hardness in the field. In this case, a uniform flat surface can be formed.

(Effects) Therefore, according to the configuration of the third aspect of the present invention, the field scene can be formed to have a constant level surface, and even if the leveling roller collides with a stone or the like, it is damaged or damaged. There is an advantage that can be suppressed.

(Structure) According to a fourth aspect of the present invention, there is provided a riding type rice transplanter according to any one of the first to third aspects, wherein the leveling roller is retractable from a working position when not working. This is a characteristic configuration.

(Operation) According to the configuration of the fourth aspect of the present invention, the leveling roller is configured to be retractable from the working position when not working, so that, for example, the leveling roller is planted with only the leveling float. In other cases, or when the planting operation itself is not performed, the leveling roller can be retracted from the work position where the leveling operation is performed.

(Effect) Therefore, according to the configuration of the fourth aspect of the present invention, the leveling roller can be retracted from the leveling position instead of being always at the leveling position. In the case where is not necessary, there is an advantage that the running load required for leveling can be reduced by retracting the leveling roller from the leveling position.

(Structure) According to a fifth aspect of the present invention, there is provided a riding type rice transplanter according to any one of the first to fourth aspects, wherein the leveling roller partially passes through before and after the muddy water. An annular concave portion is formed to allow the above.

(Function) According to the configuration of the fifth aspect of the present invention, since the leveling roller is partially formed with an annular concave portion that allows passage of the muddy water before and after the muddy water, the muddy water is formed when the muddy water is leveled. Since the amount of mud that is pushed to escape from the lateral end of the leveling roller to the lateral outside can be reduced, it is possible to prevent the muddy pushed out from the leveling roller to the lateral outside from unreasonably strongly hitting the already planted seedlings ing.

(Effects) Therefore, according to the configuration of claim 5 of the present invention, it is possible to suppress the occurrence of the flow of the muddy water that pushes the already planted seedling from the lateral side, and thus the already planted seedling may fall down due to the muddy water. Problems can be avoided.

(Structure) The riding type rice transplanter according to claim 6 of the present invention is the rice transplanter according to claim 5, wherein the relative position of the seedling changing device changes with the raising and lowering of the seedling planting device. According to the position of the transmission shaft to the planting device,
It is characterized in that the concave portion is provided in the leveling roller.

(Operation) According to the configuration of claim 6 of the present invention, the position of the transmission shaft to the seedling planting apparatus changes relative to the leveling roller as the seedling planting apparatus moves up and down. Since the recess is provided in the leveling roller, the transmission shaft can enter the recess of the leveling roller when raising and lowering the seedling planting device. Can be avoided.

(Effects) Therefore, according to the configuration of the sixth aspect of the present invention, the leveling roller and the transmission shaft do not unduly interfere with each other even when the seedling planting apparatus is moved up and down.
Ascent and descent can be performed smoothly, and it is possible to avoid the occurrence of a problem that may cause damage due to contact between the transmission shaft and the leveling roller.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a riding type rice transplanter. This riding type rice transplanter has a pair of left and right front wheels 1,
An engine 4, a riding operation unit 5, a transmission case 6, and the like are mounted on a body frame 3 supported by the vehicle wheels 1 and the rear wheels 2, 2.
A seedling planting device 9 is mounted via a link mechanism 8 operated by a hydraulic cylinder 7 to move up and down.

As shown in FIG. 1 and FIG. 2, the seedling planting device 9 includes a feed case 1 to which power is input via a transmission shaft 10 extending rearward from the transmission case 6.
1, a seedling rest 12 supported by the feed case 11 so as to be able to reciprocate left and right, a seedling planting mechanism 13 for taking out seedlings from the seedling rest 12 and planting them in a field, and transmitted to the seedling planting mechanism 13. A transmission case 14, a supporting frame 15 made of a square pipe for connecting and fixing the transmission case 14 and the feed case 11 and further supporting the transmission case 14 are provided side by side on the left and right which are connected and supported to the transmission case 14. It is composed of leveling floats 16C, 16B and 16A. Therefore, the six seedling planting mechanisms 1 on the left and right so that they can be planted in six rows.
3 are juxtaposed. In addition, each leveling float 16
The fertilizer fed out from the fertilizer device 18 provided at the rear part of the boarding operation unit 5 and fed through the hose 20 by the blower 19 is supplied to the groove generator 17 provided in A, 16B, 16C. I am trying to.

As shown in FIGS. 1 to 5, a center leveling float for detecting a mud surface position for automatically adjusting the planting depth is located between a pair of right and left rear wheels 2 and 2. A leveling roller 21 is provided in front of 16B. More specifically, a pair of left and right mounting bars 23, 23 connected and fixed to the front surface of the support frame 15 with bolts 22.
The swing arm 25 is pivotally supported at the front end of the support arm 24 at the front end of the support arm 24, which is swingably supported around the horizontal axis P1. . A roller support shaft 26 is erected between the free ends of the swinging arms 25, 25, and a pair of left and right synthetic resin roller bodies 27L, 27L, 27R is provided in a state where the position is regulated right and left with a small gap 28 therebetween. The small gap 28 forms an annular recess around the roller support shaft 26. The free ends of the swinging arms 25, 25 opposite to the side where the roller bodies 27L, 27R are provided, and the free ends of the support arms 24, 24 on the rear side of the horizontal axis P1 are each Tension springs 29, 29 for elastically urging the swing arms 25, 25 downward are stretched. Further, a lower limit position setting lever 30 for setting a lower limit position of the roller bodies 27L, 27R is swung around a coaxial center with the horizontal axis P2 on the right one of the support arms 24, 24. A sheet metal guide member 32 provided movably and having a locking groove 31 for holding the lower limit position setting lever 30 at a predetermined position is supported at a position slightly behind the horizontal axis core P2 by the support. It is attached to the arm 24 by welding. As shown in FIGS. 3 to 5, a flange-shaped receiving portion 33 for restricting the downward swing of the swing arms 25, 25 is provided at the free end of the lower limit position setting lever 30. Provided. An engagement flange portion is provided at a position where the lower limit position setting lever 30 is engaged with the engagement groove 31. The lower limit position is set so that the flange portion elastically engages with the engagement groove 31. The setting lever 30 is formed of a leaf spring member. Therefore, the lower limit position setting lever 30 is swung around the horizontal axis P2 to engage with another engagement groove 31 in a state where the engagement with the engagement groove 31 is released. Thus, the lower limit position of the leveling roller 21 can be changed.

As shown in FIG. 3, a manual adjustment lever 34 for adjusting the planting depth and the support arm 2 are provided.
4, 24 are linked to each other via link members 35, 36. Thus, the setting of the contact position of the roller bodies 27L and 27R is changed in conjunction with the adjustment of the planting depth by the manual adjustment lever 34. That is,
The lower the planting depth is, the higher the leveling position of the leveling roller 21, that is, the relative position with respect to the bottom position of the leveling float 16 </ b> B is set. The position of the leveling roller 21 is set so as to be near the bottom surface of the leveling float 16B.

As shown by arrows in FIG. 2, the small gap 28 between the left and right roller bodies 27L and 27R constitutes a concave portion through which the muddy water can pass rearward during leveling. As shown in FIG. 6, when raising the seedling planting device 9, the transmission shaft 10
Is set so that the transmission shaft 10 enters the small gap 28 so as not to interfere with the roller bodies 27L and 27R.

As shown by the imaginary line in FIG. 3, if the lower limit position setting lever 30 is locked in the frontmost locking groove 31 of the locking grooves 31, the roller bodies 27L,
The 27R is held in a posture floating above the mud surface of the field so as not to perform leveling.

[Another Embodiment] In the above-described embodiment, the change of the leveling position of the leveling roller is linked with the adjustment of the seedling planting depth, or the position is set by the lower limit position setting lever. However, for example, the swing position of the swing arm may be changed and adjusted by an electric motor.

[Brief description of the drawings]

FIG. 1 is an overall side view showing a riding type rice transplanter.

FIG. 2 is a plan view showing a leveling roller, a leveling float, and the like.

FIG. 3 is a longitudinal side view showing a leveling roller, a leveling float, and the like.

FIG. 4 is an exploded perspective view showing a support structure and the like of a leveling roller.

FIG. 5 is a rear view showing a leveling roller.

FIG. 6 is a side view showing a state where the seedling planting device is raised.

[Explanation of symbols]

 2 wheel 9 seedling planting device 11 feed case 13 seedling planting mechanism 14 transmission case 15 support frame 16B leveling float 21 leveling roller 28 recess

Claims (6)

[Claims] 1. A leveling roller for leveling a mud surface to be planted is disposed between a pair of left and right wheels of a traveling machine body in front of a leveling float for detecting a mud surface position in a seedling planting device. Riding rice transplanter. 2. The ground leveling roller is mounted on a support frame that is long in the left-right direction and supports a feed case and a transmission case for a seedling planting mechanism in the seedling planting device. 2. The riding rice transplanter according to 1. 3. The leveling roller is supported so as to be able to swing up and down around the axis of the horizontal axis, and the leveling roller is elastically urged downward with a lower limit of the swing set. The riding rice transplanter according to claim 1 or 2. 4. The riding rice transplanter according to claim 1, wherein the leveling roller is configured to be retractable from a working position when not working. 5. The riding type rice transplanter according to claim 1, wherein the leveling roller has a part formed with an annular concave portion that allows passage before and after muddy water. 6. A concave portion is provided in the leveling roller in accordance with the position of a transmission shaft to the seedling planting device, the relative position of which varies with the leveling roller as the seedling planting device moves up and down. A riding rice transplanter according to claim 5.