JP2008005739A - Leveling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seedling-transplanting machine equipped with a leveling device capable of uniformly flattening the surface of a field without having gaps between both end parts of the central leveling device towards the progressing direction of the seedling transplanting machine and end parts of the central side of the left and right leveling devices. <P>SOLUTION: This leveling device is linked with a seedling-transplanting part 4 as freely being lift-up and down and having rollers 27a, 27a at both sides towards the progressing direction of a traveling machine body 2 and a central roller 27b in further frontal direction than them. Between the frontal roller 27b and rear directional roller 27a, a transmission case 73 building-in a driving mechanism of the rollers 27a, 27b, having a crank shape bending left and right and long in front and rear direction is installed. Also, since at the front part and rear part of the transmission cases 73, 73, and in the symmetrical position to the rollers 27a, 27b by nipping the cases 73, 73, each of second rollers 27a', 27a' is arranged, the width of leveling ground becomes wider and un-leveled field area becomes less and it is possible to aim at the improvement of the ground-leveled state of the field. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a leveling device such as a seedling transplanter.

In a seedling transplanter equipped with a seedling planting device with a float (sometimes referred to as a rice transplanter), a leveling device (hereinafter referred to as a rotor) for leveling the field immediately before seedling planting by the seedling planting device Is known). The following Patent Document 1 has a configuration in which a central leveling device and three leveling devices are arranged on the left and right sides of the seedling transplanter so that the entire width of the seedling transplanting machine is divided into three, and the central leveling device is arranged in front of the left and right leveling devices. It is disclosed.
In the present specification, the forward direction of the seedling transplanter is referred to as the front side, the backward direction is referred to as the rear side, and the left-right direction toward the forward direction is referred to as the left side and the right side, respectively.
JP-A-6-125617

  In the seedling transplanting machine disclosed in the above-mentioned patent document, a gap is formed between both ends of the center leveling device and the center side of the left and right leveling devices in the traveling direction of the seedling transplanting machine. In some cases, the farming scene that touches the ground cannot be leveled by the leveling device.

  Then, the subject of this invention is the leveling which can level a field scene without a gap between the both ends of a center leveling device and the edge part of the center part side of right and left leveling devices toward the advancing direction of a seedling transplanter. It is to provide a seedling transplanter equipped with the device.

The above-mentioned problem of the present invention is solved by the following means.
According to the first aspect of the present invention, the leveling device (27a, 27a) rearward in the left-right direction with respect to the front-rear direction of the traveling vehicle body (2), and the front disposed in front of the rear leveling device (27a, 27a). The leveling device (27b) is disposed between the front leveling device (27b) and the rear leveling device (27a), and is used to drive the front and rear leveling devices (27a, 27b). A transmission case (73, 73) having a crank shape that is bent in the left and right directions, and the transmission case (73, 73) includes a mechanism and has a front portion and a rear portion that are deviated from each other in the left and right direction. 2nd leveling devices (27a ′, 27b ′) respectively disposed at symmetrical positions of the rear leveling device (27a) and the front leveling device (27b) with the case (73, 73) at the front and rear of ) .

  According to the first aspect of the invention, the transmission case (73, 73) that is long in the front-rear direction of the crank shape is a crank shape that is bent to the left and right so that the left and right positions of the front and rear portions are displaced, A second leveling device (27a) is provided at the symmetrical position of the front leveling device (27a) and the rear leveling device (27b) with the case (73, 73) at the front and rear of the transmission case (73, 73) in between. Since ', 27b') is arranged, the leveling width of the field is widened, and the leveling can be improved.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 and FIG. 2 are a side view and a plan view of a riding type rice transplanter equipped with a fertilizer application device as a granular material feeding device which is an embodiment using the present invention. In this riding type rice transplanter 1 with a fertilizer application, a seedling planting portion 4 is mounted on the rear side of the traveling vehicle body 2 via an elevating link device 3 so that the seedling planting portion 4 can be moved up and down. Is provided.

  The traveling vehicle body 2 is a four-wheel drive vehicle including a pair of left and right front wheels 10 and 10 and a pair of left and right rear wheels 11 and 11 as drive wheels, and a transmission case 12 is disposed at the front of the fuselage. Front wheel final cases 13, 13 are provided on the left and right sides of the case 12, and the left and right front wheels are mounted on the left and right front wheel axles projecting outward from the respective front wheel support portions capable of changing the steering direction of the left and right front wheel final cases 13, 13. 10 and 10 are respectively attached. Further, the front end portion of the main frame 15 is fixed to the rear portion of the transmission case 12, and a rear wheel gear case 18, with a rear wheel rolling shaft provided horizontally in the front and rear sides at the rear left and right center of the main frame 15 as a fulcrum. The rear wheels 11 and 11 are attached to a rear wheel axle that is supported in a freely rolling manner and projects outwardly from the rear wheel gear cases 18 and 18.

  The engine 20 is mounted on the main frame 15, and the rotational power of the engine 20 is transmitted to the transmission case 12 via the belt transmission device 21 and the HST 23. The rotational power transmitted to the mission case 12 is shifted by a transmission in the case 12 and then separated into traveling power and external power to be extracted. A part of the traveling power is transmitted to the front wheel final cases 13 and 13 to drive the front wheels 10 and 10, and the rest is transmitted to the rear wheel gear cases 18 and 18 to drive the rear wheels 11 and 11. Further, the external take-out power is transmitted to a planting clutch case 25 provided at the rear part of the traveling vehicle body 2, and then transmitted to the seedling planting unit 4 by the planting transmission shaft 26, and also the fertilizer application device 5 by the fertilization transmission mechanism 28. Is transmitted to.

  The upper part of the engine 20 is covered with an engine cover 30, and a seat 31 is installed thereon. A front cover 32 incorporating various operation mechanisms is provided in front of the seat 31, and a handle 34 for steering the front wheels 10 and 10 is provided above the front cover 32. The engine cover 30 and the front cover 32 have horizontal floor steps 35 on the left and right sides of the lower end. The floor step 35 is partly grid-shaped (see FIG. 2), and mud on the shoe of the worker walking through the step 35 falls on the field. The rear part on the floor step 35 is a rear step 36 that also serves as a rear wheel fender.

  Further, on both the left and right sides of the front part of the traveling vehicle body 2, the spare seedling platforms 38, 38 on which the replenishment seedlings are placed can be pivoted to a position projecting laterally from the machine body and a position housed inside. Is provided.

  The elevating link device 3 has a parallel link configuration, and includes one upper link 40 and a pair of left and right lower links 41, 41. These links 40, 41, 41 are pivotally attached to a rear-view portal-shaped link base frame 42 erected on the rear end of the main frame 15, and a vertical link 43 is connected to the tip side thereof. ing. And the connecting shaft 44 rotatably supported by the seedling planting part 4 is inserted and connected to the lower end part of the vertical link 43, and the seedling planting part 4 is connected so as to be able to roll around the connecting shaft 44. An elevating hydraulic cylinder 46 is provided between a support member fixed to the main frame 15 and a tip of a swing arm (not shown) integrally formed with the upper link 40, and the cylinder 46 is expanded and contracted by hydraulic pressure. The upper link 40 pivots up and down, and the seedling planting part 4 moves up and down while maintaining a substantially constant posture.

  The seedling planting section 4 has a six-row planting structure, a transmission case 50 that also serves as a frame, a mat seedling, and a left and right reciprocating motion to supply seedlings to the seedling outlet 51a of each row one by one. When all the seedlings are supplied to the seedling take-out outlet 51a, ..., the seedling mount 51 for transferring the seedling downward by the seedling feeding belt 51b, ..., the seedling planting for planting the seedling supplied to the seedling take-out outlet 51a, ... Attaching device 52,..., A pair of left and right drawing markers (not shown) for drawing the aircraft path in the next stroke to the topsoil surface, and the like are provided. In the lower part of the seedling planting part 4, a center float 55 is provided in the center, and side floats 56, 56 are provided on the left and right sides thereof. When the aircraft is advanced with these floats 55, 56, 56 in contact with the mud surface of the field, the floats 55, 56, 56 slide while leveling the mud surface, and the seedling planting device 52, Seedlings are planted by ... Each of the floats 55, 56, and 56 is rotatably mounted so that the front end side moves up and down in accordance with the unevenness of the soil surface of the field. During planting work, the vertical movement of the front part of the center float 55 is an angle-of-attack control sensor. The planting depth of the seedling is always kept constant by switching the hydraulic valve that controls the lifting hydraulic cylinder 46 according to the detection result to raise and lower the seedling planting unit 4. .

  The fertilizer application device 5 feeds the granular fertilizer stored in the fertilizer hopper 60 by a fixed amount by the feeding portions 61,..., And applies the fertilizer to the left and right sides of the floats 55, 56, 56 with the fertilizer hoses 62,. Guides (not shown), guided to the fertilizer guide, ... Grooves (not shown) provided on the front side of the fertilizer guide, ... are dropped into the fertilization structure formed near the side of the seedling planting strip. ing. The air generated by the blower 58 driven by the blower electric motor 53 is blown into the fertilizer hose 62 through the air chamber 59 that is long in the left-right direction, and the fertilizer in the fertilizer hose 62 is forced by the wind pressure. It is designed to be transported.

  A rotor 27 (27a, 27b) which is an example of a leveling device is attached to the seedling planting unit 4. In addition, the seedling mount 51 is configured to slide in the left-right direction using a support roller 65a of a rectangular support frame 65 having a full width in the left-right direction and the vertical direction that supports the entire seedling planting unit 4 as a rail.

The main part of the rotor support structure is shown in the side view of FIG. 3 and the rear view of FIG. 4, and the main part plan view of the rotor 27, the floats 55 and 56, and the seedling planting device 52 is shown in FIG.
The rotor support structure includes a beam member 66 whose upper ends are rotatably supported on both side members 65b of the support frame 65 of the seedling stage 51, a support arm 67 fixed to both ends of the beam member 66, and the support. A rotor support frame 68 that is rotatably attached to the arm 67 is provided. A drive shaft 70 (70a, 70b) of the rotor 27 (27a, 27b) is attached to the lower end of the rotor support frame 68. Further, the lower end portion of the rotor support frame 68 is connected to a connecting member 71 rotatably attached to the transmission case 50.

  As shown in FIG. 5, the rotor 27 b in front of the center float 55 is arranged in front of the rotor 27 a in front of the side float 56 due to the arrangement position with the floats 55 and 56. Therefore, power to the drive shaft 70a of the rotor 27a is transmitted from the gear in the gear case 18 of the rear wheel 11 through the universal joint 72 and the like, and the drive shaft 70b of the rotor 27b is driven by the drive shafts 70a, 27a of both rotors 27a, 27a. Power is transmitted from a pair of chains (not shown) in a pair of left and right chain cases 73 to which power is transmitted from the end portion inside the vehicle body of 70a.

  Since the drive shaft 70b of the rotor 27b is only supported via a pair of left and right chain cases 73, 73, a reinforcing member 74 that bridges the pair of left and right chain cases 73, 73 is provided to reinforce the chain cases 73, 73. Is provided.

The rotor 27b is suspended by a pair of link members 76 and 77 whose upper ends are supported by the beam member 66 via a spring 78.
The pair of link members 76 and 77 includes a first link member 76 whose one end is fixedly supported by the beam member 66 and a second link member 77 whose one end is rotatably connected to the other end of the first link 76. Thus, the spring 78 is connected between the other end of the second link member 77 and a mounting piece 74a rotatably supported by the reinforcing member 74.

A bent piece 82 is fixed to the lower end portion of the rotor vertical position adjusting lever 81, and the bent piece 82 is rotatably supported by the support frame 65. When the lever 81 is rotated in the left-right direction of the vehicle, the lever 81 is bent near the protrusion 66a fixedly supported by the beam member 66 that is rotatably supported by the side members 65b of the support frame 65. The piece 82 rotates up and down. Since the bent piece 82 is locked below the protrusion 66a, the protrusion 66a rotates the lever 81 in the right direction of the machine body (in the direction of arrow S in FIG. 4), so that the beam member 66 is centered upward. Rotate as By the rotation of the projecting portion 66a, the end of the first link member 76 opposite to the connecting portion with the beam member 66 is also rotated upward about the beam member 66. By rotating the first link member 76 upward, the rotor 27b can be lifted upward via the second link member 77 and the spring 78. When the rotor 27b is moved upward, the rotor 27a is also simultaneously moved upward via the drive shaft 70b and the drive shaft 70a.
Since the rotor vertical position adjusting lever 81 is provided at substantially the center of the vehicle body 2, it is easy to balance left and right when the rotors 27a and 27b are moved up and down.

  A rotor housing lever 84 that also serves as a clutch lever is fixed to the beam member 66. When the lever 84 is rotated in the direction of arrow T (FIG. 3), the support arm 67 is interlocked with the rotation of the beam member 66. Also rotates in the direction of arrow T. As the support arm 67 rotates in the direction of arrow T, the rotor support frame 68 moves upward, so that the rotors 27a and 27b are moved to the storage position, that is, to the back side of the seedling stage 51. be able to.

In this embodiment, the rotors 27a and 27b at a standard position of the rotor vertical position adjusting lever 81 at a height of 40 mm from the field can be rotated up to 15 mm from the standard position by turning in the direction of arrow S in FIG. It is set so that it can be lowered by up to 15 mm from the standard position by turning in the direction opposite to the arrow S direction.
Further, as shown in FIG. 1, a rotor cover 37 is provided on the upper rear side of the rotor 27 so that mud is not applied on the floats 55 and 56.

  As shown in FIG. 5, the left and right rotors 27a and the central rotor 27b are arranged so as to be deviated forward and backward, and a pair of chain cases 73, 73 extending in the front-rear direction between the rotors 27a, 27b are arranged. The chain cases 73 and 73 have a crank shape in which the left and right positions of the front and rear portions are deviated and bent left and right. Because of the crank shape, the pair of chain cases 73 and 73 have two case widths at the front portion narrower than the two rear case widths in plan view.

  Rotors 27b ′ and 27b ′ are respectively disposed on the front sides of the pair of chain cases 73 and 73 on the left and right outer sides of the cases 73 and 73, respectively. The rotors 27 a ′ and 27 a ′ are arranged inside 73.

  Therefore, the rotor 27 is arranged evenly over the entire width in the left-right direction of the planting position of the rice transplanter 1 and thus the rice transplanter 1, and the leveling width of the field is widened, and the leveling performance can be improved.

  6 shows an internal plan view of the crank-shaped chain case 73 (FIG. 6 (a)), an internal structure diagram (FIG. 6 (b)) viewed from the direction of arrow A in FIG. A perspective view (FIG.6 (c)) is shown.

  Two chains 79 and 80 are used in the chain case 73, and the first chain is between the sprocket 83 provided on the drive shaft 70b in the case 73 and the counter sprocket 85 provided on the counter shaft 87 in the middle part of the case. 79 is passed. A second chain 80 is stretched between a sprocket 88 provided on the drive shaft 70 a and a counter sprocket 86 provided on the counter shaft 87.

  Further, chain receivers 91 and 92 that support these chains 79 and 80 from the lower side so as to be slidable are arranged at positions corresponding to the respective chains 79 and 80. The chain receivers 91 and 92 are attached to the reinforcing members 94 and 95 in the chain case 73. Since the chain receivers 91 and 92 can be shared by the pair of left and right chain cases 73 and 73, the chain receivers 91 and 92 are inexpensive. Further, by using the reinforcing members 94 and 95 also as the attachment portions of the chain receivers 91 and 92, a fastening member such as a bolt becomes unnecessary.

  Further, as shown in FIG. 7, in order to widen the leveling width of the field and improve the leveling performance, the rotor is connected to the chain drive counter shaft 87 provided in the intermediate portion of the crank-shaped chain cases 73 and 73 described above. 27c may be provided. In this case, since there is a universal joint 72 on the left side of the left chain case 73, in order to avoid interference with the case 73, the left chain case 73 is provided with one rotor 27c. On the other hand, the right chain case 73 may be provided with two rotors 27c.

  As shown in the plan view of FIG. 8, instead of the universal joint 72 shown in FIG. 5, the rotor input shaft 97 connected to the power transmission shafts (not shown) of the pair of rear wheel gear cases 18 and 18 (this Power input to the input shaft 97 is transmitted from the right rear gear case 18), and power may be transmitted from the input shaft 97 to the drive shaft 70b of the rotor 27b via the transmission case 98. .

  Further, chains 102 and 102 are provided between the sprockets 100 and 100 in the transmission cases 99 and 99 provided at both ends of the drive shaft 70b and the sprockets 101 and 101 provided on the drive shafts 70a and 70a of the rotors 27a and 27a on both sides. The drive force from the input shaft 97 is transmitted to each of the rotors 27a and 27a. Since the sprockets 101 and 101 of the drive shafts 70a and 70a are provided at the center of each drive shaft 70a, the bearings 106 and 106 having the same configuration can be used for bearings of the rotors 27a and 27a, so that the configuration can be simplified.

  As shown in the plan view of FIG. 9A (the cover shows a cross section) and the perspective view of the rotor cover portion of FIG. 9B, the transmission case 98 is moved from the input shaft 97 for driving the rotors 27a and 27b. The rotor power is input from the side of the drive shaft 70b of the rotor 27b, and at the same time, the sprockets 100, 100 in the transmission cases 99, 99 provided at both ends of the drive shaft 70b and the ends of the drive shafts 70a, 70a. The provided sprockets 101, 101 may be connected by chains 102, 102 to drive the left and right rotors 27a, 27a.

  At this time, the rotor covers 37a and 37b provided on the rotors 27a and 27b are attached to the bearings 108a and 108b of the drive shafts 70a and 70b, so that the rotor covers 37a and 37b, the drive shafts 70a and 70b, and the bearings 108a and 108b are integrated. Therefore, the equipment cost can be reduced as compared with the case where each individual member is assembled.

  Further, the drive shafts 70a, 70a at the outer end portions of the rotors 27a, 27a are provided with side wall plates 109, 109 covering the rotor covers 37a, 37a, thereby preventing mud scattering and preventing mud waves from being generated. Pushing can be prevented. Further, since the side wall plate 109 covers the side surfaces of the rotors 27a and 27a that are rotationally driven, it contributes to safety.

  In the present invention, the seedling planting part of the rice transplanter can be configured simply and has a high possibility of use.

It is a side view of the riding type rice transplanter of the Example of this invention. It is a top view of the riding type rice transplanter of FIG. It is a principal part side view of the seedling planting part of FIG. It is a principal part rear view of the support structure of the seedling stand of FIG. It is a principal part top view of the seedling planting part of FIG. 1 is a plan view of the interior of the chain case for driving the rotor of the seedling planting part in FIG. 1 (FIG. 6A), FIG. 6A is an internal structure diagram viewed from the direction of arrow A (FIG. 6B), and a chain receiver. FIG. 6 is a perspective view (FIG. 6C). It is a principal part top view of the seedling planting part of the other Example of FIG. It is a principal part top view of the seedling planting part of the other Example of FIG. It is a principal part top view (FIG. 9 (a)) of the seedling planting part of the other Example of FIG. 1, and a perspective view (FIG.9 (b)) of a rotor cover part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Riding type rice transplanter with fertilizer 2 Traveling vehicle body 3 Elevating link device 4 Seedling planting part 5 Granule feeding device (fertilizer) 10 Front wheel 11 Rear wheel 12 Mission case 13 Front wheel final case 15 Main frame 18 Rear wheel gear case 20 Engine 21 Belt drive 23 HST
25 Planting clutch case 26 Planting transmission shaft 27 (27a, 27b) Rotor 27a ', 27a' Rotor 27b ', 27b' Rotor 27c Rotor 28 Fertilizer transmission mechanism 30 Engine cover 31 Seat 32 Front cover 34 Handle 35 Floor step 36 Rear Step 37 (37a, 37b) Rotor cover 38 Preliminary seedling stage 40 Upper link 41 Lower link 42 Link base frame 43 Vertical link 44 Connection shaft 46 Lifting hydraulic cylinder 50 Transmission case 51 Seedling stage 51a Seedling outlet 51b Seedling feed belt 52 Seedling planting device 52a Seedling planting tool 53 Blower electric motor 55 Center float 56 Side float 58 Blower 59 Air chamber 60 Fertilizer hopper 61 Feeding part 62 Fertilization hose 65 Seedling planting part support frame 65a Support roller 65b Both side members 66 Beam Member 66a Protruding portion 67 Support arm 68 Rotor support frame 70 (70a, 70b) Drive shaft 71 Connecting member 72 Universal joint 73 Chain case 74 Reinforcing member 74a Mounting piece 76 First link member 77 Second link member 78 Spring 79 First chain 80 Second chain 81 Rotor vertical position adjustment lever 82 Bending piece 83, 88 Sprocket 84 Rotor housing lever 87 Counter shaft 85, 86 Counter sprocket 91, 92 Chain receiver 94, 95 Reinforcement member 97 Rotor input shaft 98 Transmission case 99 Transmission case 100, 101 Sprocket 102 Chain 106 Bearing 108a, 108b Bearing 109 Side wall plate

Claims (1)

It consists of a rear leveling device (27a, 27a) in the left-right direction with respect to the front-rear direction of the traveling vehicle body (2) and a front leveling device (27b) disposed in front of the rear leveling device (27a, 27a). ,
Arranged between the front leveling device (27b) and the rear leveling device (27a), and equipped with a drive transmission mechanism for the front and rear leveling devices (27a, 27b), the front and the rear And a transmission case (73, 73) long in the front-rear direction of a crank shape bent at the left and right at positions displaced from each other in the left-right direction;
Secondly arranged at symmetrical positions of the rear leveling device (27a) and the front leveling device (27b) with the case (73, 73) at the front and rear portions of the transmission case (73, 73) in between. Leveling device (27a ', 27b')
Leveling device with

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