JP7097835B2 - Paddy field work machine - Google Patents

Description

The present invention relates to a paddy field working machine provided with a leveling float.

For example, Patent Document 1 describes a paddy field working machine including a seedling planting device, an elevating mechanism for raising and lowering the seedling planting device, a center float and a side float, and a height sensor. The center float and the side float are supported at the lower part of the seedling planting device in a state where they can swing up and down. The height sensor detects the height from the center float to the seedling planting device. The elevating mechanism is controlled so that the detected value of the height sensor is maintained at the planting set value.
As a result, the seedling planting device is maintained at a set height with respect to the center float that follows the field surface, and the seedling planting depth by the seedling planting device is maintained at a predetermined planting depth.

Japanese Unexamined Patent Publication No. 2017-55704

In the paddy field working machine of Patent Document 1, the seedling planting depth is controlled according to the vertical swing amount of only the center float, and the side float is not involved in the control of the seedling planting depth. Since the center float is located in the center of the width direction of the seedling planting device, the control of the seedling planting depth is performed only according to the condition of the field surface corresponding to the center of the seedling planting device. Become. In that respect, there is room for improvement in the paddy field working machine of Patent Document 1.

In view of the above-mentioned circumstances, an object of the present invention is to realize a paddy field working machine with improved control of planting depth.

The paddy field working machine of the present invention includes a working device and a leveling float provided below the working device to level the mud surface of the paddy field, and the leveling float includes a right side float, a left side float, and the right side. The right side float and the left side float include an intermediate float arranged between the float and the left side float, and an integral connecting portion for integrally connecting the right side float, the left side float, and the intermediate float. It is supported by a working device, and the intermediate float is supported only by the integrally connecting portion of the working device and the integrally connecting portion .

According to this characteristic configuration, the right side float, the left side float, and the intermediate float are integrally connected, so that the planting depth can be controlled according to the condition of the field surface in a wider area than before. This makes it possible to more accurately reflect the condition of the rice field in controlling the planting depth. The term "control of planting depth" refers to control of the depth of planting or sowing of seedlings performed by a working device.
Further, according to this feature configuration, the support mechanism for the intermediate float to the working device can be omitted, and the weight of the working device can be reduced.

In the present invention, it is preferable that the integral connecting portion is attached to the front end portion of the right side float, the front end portion of the left side float, and the front end portion of the intermediate float.

According to this feature configuration, when one float swings up and down as it moves forward, the entire integrated float swings up and down more sharply than when it is connected at the rear end. Become. This makes it possible to control the planting depth by more accurately reflecting the condition of the field surface.

In the present invention, it is preferable that the length of the intermediate float in the anteroposterior direction is smaller than the length of the right float in the anteroposterior direction and smaller than the length of the left float in the anteroposterior direction.

According to this feature configuration, the intermediate float is configured to be smaller than the other floats, so that the weight of the entire leveling float can be reduced. As a result, the leveling float can detect the condition of the field surface more accurately, and can control the planting depth of the seedlings more accurately. In addition, the weight of the working device can be reduced.

In the present invention, it is preferable that the intermediate float includes a grooving device and a soil covering plate behind the grooving device and provided at the rear end of the intermediate float.

According to this characteristic configuration, it is possible to make a groove and cover soil even in the intermediate float, which is preferable. Further, since the soil covering plate is provided at the rear end of the intermediate float, the length of the intermediate float in the front-rear direction becomes the minimum necessary length, and the weight of the entire leveling float can be reduced. As a result, the leveling float can detect the condition of the field surface more accurately, and can control the planting depth of the seedlings more accurately. In addition, the weight of the working device can be reduced.

In the present invention, it is preferable that a detection unit for detecting the distance between the ground leveling float and the work apparatus is provided, and the detection unit is connected to the integrally connecting portion.

According to this characteristic configuration, the detection unit can accurately detect the behavior of the integrally connected leveling float, and the planting depth can be controlled by more accurately reflecting the condition of the field surface.

It is a left side view of a passenger-type rice transplanter. It is a top view of a passenger-type rice transplanter. It is a left side view of a seedling planting apparatus. It is a left side view near the leveling float. It is a top view of the leveling float. It is a bottom view of the leveling float. It is a conceptual diagram which shows the mode of the elevating control of a seedling planting apparatus.

A passenger-type rice transplanter, which is an example of a paddy field working machine, will be described with reference to the drawings below. In FIGS. 1 to 6, F indicates a forward direction, B indicates a backward direction, U indicates an upward direction, and D indicates a downward direction. R indicates the right direction, and L indicates the left direction.

(Overall configuration of passenger rice transplanter)
As shown in FIG. 1, in a passenger-type rice transplanter, a link mechanism 4 is vertically swingably supported on the rear portion of a traveling machine body 3 provided with right and left front wheels 1 and right and left rear wheels 2. A hydraulic cylinder 5 that extends to the rear side and raises and lowers the link mechanism 4 is provided.

A seedling planting device 6 (corresponding to a working device) is supported at the rear of the link mechanism 4 so as to be rollable around an axial core P1 (see FIG. 3) in the front-rear direction. A fertilizer application device 7 for supplying fertilizer to the rice field surface G is provided over the rear portion of the traveling machine 3 and the seedling planting device 6, and a ground leveling device 50 for leveling the rice field surface G at the lower part on the front side of the seedling planting device 6. Is supported.

(Overall configuration of seedling planting equipment)
As shown in FIGS. 1, 2, and 3, the seedling planting device 6 includes a support frame 8, a feed case 14, a planting transmission case 9, a rotating case 10, a planting arm 11, a leveling float F, a seedling stand 13, and the like. Is provided. In the present embodiment, as shown in FIG. 2, the leveling float F is composed of three floats, a right float 70, a left float 80, and an intermediate float 90.

The support frame 8 is manufactured by an aluminum drawing method and has a trapezoidal cross-sectional shape (see FIG. 4). The support frame 8 is arranged along the left-right direction, the feed case 14 is connected to the center of the left and right of the support frame 8, and the three planting transmission cases 9 are located at the right, center, and left parts of the support frame 8. It is connected and extended to the rear side.

The rotary case 10 is rotatably supported on the right and left portions of the rear portion of the right and left planting transmission cases 9. A rotary case 10 is rotatably supported on the right side of the rear part of the central planting transmission case 9. Planting arms 11 are supported at both ends of the rotating case 10. The seedling stand 13 is supported so as to be able to reciprocate in the left-right direction. That is, in this embodiment, the seedling planting device 6 is configured as a five-row planting device.

The feed case 14 is rotatably supported around the lower front-rear axis P1 of the lower part of the link mechanism 4, and the entire seedling planting device 6 is rotatably supported around the axis P1.

The power of the engine 34 mounted on the front portion of the traveling machine body 3 is transmitted from the planting clutch (not shown) to the internal transmission mechanism (not shown) of the feed case 14 via the transmission shaft 35. A horizontal feed shaft (not shown) provided on the feed case 14 drives the seedling pedestal 13 to reciprocate laterally feed in the left-right direction with a predetermined stroke.

The power transmitted to the transmission mechanism of the feed case 14 rotates via the torque limiter (not shown), the transmission chain (not shown) and the minority clutch (not shown) inside the planting transmission case 9. It is transmitted to the case 10. As the seedling stand 13 is driven to reciprocate and laterally feed in the left-right direction, the rotary case 10 is rotationally driven, and the planting arms 11 alternately take out the seedlings from the lower part of the seedling stand 13 and plant them on the rice field G.

(Overall configuration of fertilization equipment)
As shown in FIGS. 1, 2 and 3, as the fertilization device 7, a hopper 15, a feeding portion 16, a blower 17, a groove grooving device 18, a hose 19 and the like are provided.

In the traveling machine 3, a hopper 15 for storing fertilizer and a feeding portion 16 are supported on the rear side of the driver's seat 20, and a blower 17 is provided on the left lateral side of the feeding portion 16.
A grooving device 18 is attached to the leveling float F, five grooving devices 18 are provided, and five hoses 19 are connected to the feeding portion 16 and the grooving device 18.

The power of the engine 34 is transmitted to the feeding section 16 via a fertilization clutch (not shown), the fertilizer of the hopper 15 is fed by the feeding section 16, and the groove making device is passed through the hose 19 by the transport air of the blower 17. It is supplied to 18. Fertilizer is supplied from the grooving device 18 to the groove of the field surface G while the groove is formed on the field surface G by the grooving device 18. Soil (mud) is covered with the soil covering plate 18a provided behind the groove making device 18 to the groove of the field surface G formed by the groove making device 18.

(Overall composition of leveling float)
A leveling float F for leveling the mud surface of the paddy field is provided at the lower part of the seedling planting device 6. As shown in FIGS. 2, 5, and 6, the leveling float F is composed of three floats, a right float 70, a left float 80, and an intermediate float 90. The right float 70 is located behind the right rear wheel 2 in a plan view, and the left float 80 is located behind the left rear wheel 2. The intermediate float 90 is arranged between the right float 70 and the left float 80. The right float 70, the left float 80, and the intermediate float 90 are arranged so as to be located below the planting transmission case 9 in a side view.

As shown in FIGS. 2, 4, 5, and 6, an integral connecting portion 100 for integrally connecting the right float 70, the left float 80, and the intermediate float 90 is provided. The integral connecting portion 100 is a hollow prismatic member, and is arranged in a posture extending along the left-right direction.
The integral connecting portion 100 is attached to the upper surface of the front end portion of the right float 70, the upper surface of the front end portion of the left float 80, and the upper surface of the front end portion of the intermediate float 90.

As shown in FIGS. 2 and 4, the right float 70 and the left float 80 have a T-shaped shape when viewed from above. The right float 70 and the left float 80 have substantially the same shape. As shown in FIGS. 4 and 5, two grooving devices 18 and two soil covering plates 18a are provided on the lower surfaces of the right float 70 and the left float 80. The soil covering plate 18a is located behind the groove making device 18.

As shown in FIGS. 2 and 4, the intermediate float 90 includes a rectangular front portion and a rear portion that projects rearward at the left end of the front portion in top view. As shown in FIGS. 4 and 5, one groover 18 and one soil covering plate 18a are provided on the lower surface of the intermediate float 90. The soil covering plate 18a is provided at the rear end portion of the rear portion of the intermediate float 90, that is, at the rear end portion of the intermediate float 90. The soil covering plate 18a is located behind the groove making device 18.

As shown in FIG. 5, the length L1 in the front-rear direction of the right float 70 and the length L2 in the front-rear direction of the left float 80 are equal to each other. The anteroposterior length L3 of the intermediate float 90 is smaller than the anteroposterior length L1 of the right float 70 and smaller than the anteroposterior length L2 of the left float 80.

As shown in FIG. 5, the width W1 in the left-right direction of the right float 70 and the width W2 in the left-right direction of the left float 80 are equal to each other. The width W3 in the left-right direction of the intermediate float 90 is smaller than the width W1 in the left-right direction of the right float 70, and smaller than the width W2 in the left-right direction of the left float 80.

(Support structure of leveling float by seedling planting device)
As shown in FIG. 4, the bracket 27 is connected to the rear portion 8b of the support frame 8.
The float pipe 28 is arranged below the planting transmission case 9 along the left-right direction, and is rotatably supported by the bracket 27 around the axis P2 in the left-right direction.

As shown in FIG. 5, two support arms 28a extend rearward from the right end of the float pipe 28. A bracket 71 at the rear of the right float 70 is attached to the rear ends of the two support arms 28a so as to be swingable around the axis P3 in the left-right direction. That is, the right float 70 is supported by the seedling planting device 6 via the support arm 28a.

Two support arms 28a extend rearward from the left end of the float pipe 28.
A bracket 81 at the rear of the left float 80 is attached to the rear ends of the two support arms 28a so as to be swingable around the axis P3 in the left-right direction. That is, the left float 80 is supported by the seedling planting device 6 via the support arm 28a.

The intermediate float 90 is not connected to the float pipe 28 and the support arm 28a.
That is, the intermediate float 90 is supported only by the integrally connecting portion 100.

As shown in FIG. 4, the planting depth lever 29 is connected to the float pipe 28 and extends diagonally to the upper side on the front side. A lever guide 30 (see FIG. 3) is connected to the right portion of the feed case 14, and a planting depth lever 29 is inserted into the lever guide 30.

By operating the planting depth lever 29 up and down, the support arm 28a of the float pipe 28 is operated up and down to change the position of the shaft core P3 (the rear part of the right float 70 and the left float 80) up and down. Can be done. By engaging the planting depth lever 29 with the lever guide 30, the position of the shaft core P3 (the rear part of the right float 70 and the left float 80) can be fixed.

(Structure related to elevating control of seedling planting device)
A detection unit S for detecting the distance between the leveling float F and the seedling planting device 6 is provided. The detection unit S is composed of a detection member 40, a connection member 41, and a wire 43.

As shown in FIG. 4, the channel-shaped detection member 40 is supported by the bracket 101 connected to the left portion of the integrally connecting portion 100 in a swingable state around the axis P4 in the left-right direction. It extends upward through between the support frame 8 and the cover 55. That is, the detection unit S is connected to the integral connection unit 100 via the bracket 101.

A connecting member 41 formed by bending a round bar member is provided. As shown in FIG. 4, a bracket 42 is provided on the upper portion 8a of the support frame 8. The intermediate portion of the connecting member 41 is supported by the bracket 42 in a state where it can swing around the axis P5 in the left-right direction.

An elongated hole 40a along the vertical direction is opened in the detection member 40, and one end 41a of the connecting member 41 is inserted into the elongated hole 40a of the detection member 40. The stay 32 extends diagonally upward from the float pipe 28. An elongated hole 32a is opened in the stay 32, and the other end portion 41b of the connecting member 41 is inserted into the elongated hole 32a of the stay 32.

As shown in FIG. 7, a control valve 65 for supplying / discharging hydraulic oil to the hydraulic cylinder 5 is provided in the traveling machine body 3. The control valve 65 supplies hydraulic oil to the hydraulic cylinder 5 to raise the hydraulic cylinder 5 (contraction operation), discharges the hydraulic oil from the hydraulic cylinder 5 to lower the hydraulic cylinder 5 (extension operation). It can be operated in the lowered position and the neutral position where the hydraulic cylinder 5 is stopped.

A spool 65a that can be slid in the left-right direction in FIG. 7 is provided on the control valve 65, and the spool 65a of the control valve 65 is urged to a lower position by a spring (not shown). An operation arm 66 that can swing around the axis P9 in the left-right direction is provided, and the spool 65a of the control valve 65 can be pushed to the ascending position side by the operation arm 66, and the operation arm 66 is a spring (not shown). ) Is urged to the side of the control valve 65 away from the spool 65a.

As shown in FIGS. 4 and 7, one end of the inner 43a of the wire 43 is connected to the operating arm 66. At the other end of the wire 43, the inner 43a of the wire 43 is connected to the end 41a of the connecting member 41 and the outer 43b of the wire 43 is connected to the upper end of the detection member 40.

As described in the above (support structure of the ground leveling float by the seedling planting device), the planting depth lever 29 is engaged with the lever guide 30, and the shaft core P3 (the rear part of the right float 70 and the left float 80). When the position of is fixed, the posture of the connecting member 41 is also fixed by the planting depth lever 29.

(Operating state of elevating control of seedling planting device)
As shown in FIGS. 4 and 7, the leveling float F follows the ground surface G on the ground as the traveling machine 3 advances, and when the seedling planting device 6 moves up and down with respect to the field surface G (leveling float F). The ground leveling float F swings up and down with respect to the seedling planting device 6, and the detection member 40 moves up and down with respect to the seedling planting device 6 (connecting member 41). The state shown in FIGS. 4 and 7 is a state in which the spool 65a of the control valve 65 is operated to the neutral position and the hydraulic cylinder 5 is stopped.

When the seedling planting device 6 descends from the state shown in FIGS. 4 and 7 and approaches the rice field surface G, the leveling float F rises with respect to the seedling planting device 6, and the detection member 40 with respect to the connecting member 41. Is raised, and the inner 43a of the wire 43 is pulled toward the seedling planting device 6.
As a result, the spool 65a of the control valve 65 is pushed to the ascending position by the operating arm 66, the hydraulic cylinder 5 is ascended, and the seedling planting device 6 is ascended.

When the seedling planting device 6 rises from the state shown in FIGS. 4 and 7 and moves away from the rice field surface G, the leveling float F descends with respect to the seedling planting device 6, and the detection member 40 with respect to the connecting member 41. Is lowered, and the inner 43a of the wire 43 is pushed toward the operation arm 66.
As a result, the operation arm 66 is separated from the spool 65a of the control valve 65, the spool 65a of the control valve 65 is moved to the lowering position, the hydraulic cylinder 5 is lowered, and the seedling planting device 6 is lowered.

As described above, the vertical position of the leveling float F with respect to the seedling planting device 6 is transmitted to the operation arm 66 by the detection unit S via the wire 43, and the spool 65a of the control valve 65 is operated. When the positional relationship between the upper end of the detection member 40 and the end 41a of the connecting member 41 (the length of the inner 43a protruding from the outer 43b of the wire 43) returns to the state shown in FIG. 4, the control valve 65 is operated by the operation arm 66. The spool 65a is pushed to the neutral position, and the hydraulic cylinder 5 is stopped.

As a result, the positional relationship between the upper end portion of the detection member 40 and the end portion 41a of the connecting member 41 (the length of the inner 43a protruding from the outer 43b of the wire 43) is controlled so as to be maintained in the state shown in FIG. The spool 65a of the valve 65 is operated, the seedling planting device 6 is automatically raised and lowered, and the seedling planting device 6 is maintained from the field surface G to the set height H1 shown in FIG. The planting depth of the seedlings by the device 6 (planting arm 11) is maintained at the set planting depth.

(Change of seedling setting planting depth)
In the state shown in FIG. 4, the position of the axis P3 (the rear part of the right float 70 and the left float 80) is closest to the seedling planting device 6, and the set height H1 (see FIG. 7) is the closest. It is in a low state (the set planting depth of seedlings is the deepest).

When the planting depth lever 29 is operated from the state shown in FIG. 4 and the position of the shaft core P3 (rear part of the right float 70 and the left float 80) with respect to the seedling planting device 6 is changed to the lower side, it is set. The height H1 becomes higher, and the set planting depth of seedlings becomes shallower.

When the planting depth lever 29 is operated to change the set planting depth of the seedlings, the positions of the ground leveling float F and the detection member 40 with respect to the seedling planting device 6 change up and down. The connecting member 41 is swung around the shaft core P5 in conjunction with the planting depth lever 29, and the position of the end portion 41a of the connecting member 41 is changed up and down as described below. ..

When the set planting depth of the seedling is changed to the deep side (lower side of the set height H1) by the planting depth lever 29 (when the position of the detection member 40 rises with respect to the seedling planting device 6), Along with this, the position of the inner 43a of the wire 43 (the end portion 41a of the connecting member 41) is also changed to the upper side.

When the set planting depth of the seedling is changed to the shallow side (high side of the set height H1) by the planting depth lever 29 (when the position of the detection member 40 is lowered with respect to the seedling planting device 6), Along with this, the position of the inner 43a of the wire 43 (the end portion 41a of the connecting member 41) is also changed to the lower side.

As a result, even if the planting depth lever 29 is operated to change the set planting depth of the seedlings, the positional relationship between the upper end portion of the detection member 40 and the end portion 41a of the connecting member 41 (outer 43b of the wire 43). The length of the inner 43a coming out of the seedling planting device 6) is maintained in the state shown in FIG. The seedling planting depth by the seedling planting device 6 (planting arm 11) is maintained at the set planting depth.

(Other embodiments)
(1) In the above embodiment, an example in which the leveling float F is composed of three floats, a right side float 70, a left side float 80, and an intermediate float 90, has been described. The number of intermediate floats 90 may be two or more. That is, the number of floats connected by the integrally connecting portion 100 may be four or more. Further, a float not connected by the integral connecting portion 100 may be arranged on the right side of the right float 70 or on the left side of the left float 80. That is, not all floats need to be connected by the integral connecting portion 100.

(2) In the above embodiment, an example in which the integral connecting portion 100 is a hollow prismatic member has been described. The shape of the integral connecting portion 100 is not limited to this, and may be, for example, a hollow columnar, a solid square bar or a round bar, a plate-shaped member, or the like.

(3) In the above embodiment, the integral connecting portion 100 is one rod-shaped member, and three floats are connected by this one member. The integral connecting portion 100 may be composed of a plurality of members. For example, the integral connecting portion 100 may be composed of a member that connects the right side float 70 and the intermediate float 90, and a member that connects the left side float 80 and the intermediate float 90.

(4) In the above embodiment, the hydraulic cylinder 5 is controlled and the seedling planting device 6 is moved up and down based on the distance between the ground leveling float F detected by the detection unit S and the seedling planting device 6. An example in which the detection unit S is composed of the detection member 40, the connection member 41, and the wire 43 has been described. The configuration of the detection unit S is not limited to this, and may be, for example, a distance measuring sensor or the like. Further, the hydraulic cylinder 5 is controlled based on the output of the sensor or the like, and the seedling planting device 6 can be moved up and down.

(5) In the above embodiment, an example in which the seedling planting device 6 is a 5-row planting device has been described, but the present invention is not limited to the 5-row planting seedling planting device 6, but 4-row planting and 6-row planting. It can also be applied to the seedling planting device 6 for planting, 8-row planting, and 10-row planting.

The present invention can be applied not only to a passenger-type rice transplanter but also to a passenger-type direct sowing machine provided with a sowing device (corresponding to a working device) for supplying seeds to the rice transplanter surface G.

6: Seedling planting device (working device)
18: Grooving device 18a: Soil cover plate 70: Right float 80: Left float 90: Intermediate float 100: Integrated connection part F: Ground leveling float S: Detection part

Claims (5)

With the work equipment
It is provided at the bottom of the work equipment and is equipped with a leveling float for leveling the mud surface of paddy fields.
The ground leveling float is an integral connection that integrally connects the right side float, the left side float, the intermediate float arranged between the right side float and the left side float, and the right side float, the left side float, and the intermediate float. With a department ,
The paddy field working machine in which the right side float and the left side float are supported by the working device, and the intermediate float is supported only by the integrally connecting portion of the working device and the integrated connecting portion . The paddy field working machine according to claim 1, wherein the integrally connecting portion is attached to a front end portion of the right side float, a front end portion of the left side float, and a front end portion of the intermediate float. The paddy field working machine according to claim 1 or 2, wherein the length of the intermediate float in the front-rear direction is smaller than the length of the right-side float in the front-rear direction and smaller than the length of the left-side float in the front-rear direction. The paddy field according to any one of claims 1 to 3, wherein the intermediate float includes a grooving device and a soil covering plate behind the grooving device and provided at the rear end of the intermediate float. Working machine. It is equipped with a detector that detects the distance between the leveling float and the work equipment.
The paddy field working machine according to any one of claims 1 to 4 , wherein the detection unit is connected to the integrally connecting unit.

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