JP4975907B2 - Towing type leveling machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a towing type leveling work machine, and more particularly, to a towing type leveling work machine suitable for a large-scale field that enables a plane finish parallel to a reference plane drawn using a laser beam. Furthermore, the present invention relates to a traction type leveling machine that can be directly mounted on a tractor.
[0002]
[Prior art]
Currently, a policy to promote the expansion of domestic farming scale is being adopted in order to counter the trend of opening up the market for agricultural products around the world. Therefore, it must be considered that the work efficiency is improved, especially in the case of paddy fields, an accurate plane is formed.
Work machines used for general field leveling work, so-called leveling work machines, are often used for direct mounting, and are suitable for work with relatively small horsepower tractors. However, leveling work using a large leveling machine using a large tractor is required to perform work considering efficiency.
In the leveling work that has been carried out frequently in the past, since the size of the field is not so large, the work is carried out using a so-called direct-equipped leveling work machine that is mounted by a three-point hitch. There is a natural limit to the scale of work.
[0003]
[Problems to be solved by the invention]
When the leveling machine is mounted on the tractor using the direct mounting method, there is a limit to the capacity of the leveling machine as described above, and it is difficult to perform leveling work efficiently on large-scale fields. There were many points.
To level a radish-scale field that is advantageous from a farming point of view, and to do this efficiently, use a large tractor with excellent work ability and attach a work machine with good work ability. Work needs to be done.
As a matter of course, the working machine having excellent work ability has a large work width and a large work resistance, but the work movement distance in the field can be reduced and the work can be efficiently performed.
However, in order to use a large leveling machine, it is necessary to attach the leveling machine to the tractor by traction type. In this case, the leveling plate of the work machine is controlled up and down accurately as in the direct mounting type. And the entire field cannot be leveled accurately.
Therefore, there is a difficulty that the leveling operation cannot be performed efficiently and accurately in a large-scale field.
In addition, a towing type flat work machine is useful because the work machine has a large work capacity, but when the work machine is moved once the work is finished, it is equipped with a moving wheel. It is necessary to take measures to keep track or to prepare a separate truck for transportation.
Therefore, the present invention is capable of forming a field surface on a desired plane so as to perform efficient leveling work efficiently even on a large-scale field by a towing type leveling machine. The purpose is to provide a flat work machine.
It is another object of the present invention to provide a towing-type leveling work machine that does not need to be equipped with wheels for movement for traveling and does not need to prepare a truck vehicle for transportation.
[0004]
[Means for Solving the Problems]
  In order to achieve the above-described object, the present invention provides a traction type leveling work machine that is pulled by a traction rod with respect to a tractor and includes at least a leveling plate and a tine in a row.The traction rod has a pressure receiving portion that is widened toward the rear from the hitch end of the tractor, and the other end extends to the back of the flat plate and is integrated with the flat plate. The earth pressure is applied to the pressure receiving part of the traction rod when the ground cut by the leveling plate rises,The flat plate isIt consists of a curved plate in side view,It has a side plate along the working direction and along a vertical plane.,It has an enlarged part that protrudes higher than the upper edge of the flat plate, and further behind the tine rowOn a flat plateOne end isPivotedThere is a gage wheel attached through a support arm, and one end of a leveling control cylinder unit for raising and lowering the leveling plate with a grounding point of the gage wheel as a fulcrum is provided.The other end is pivotally attached to the traction wheel side and the support arm side of the gauge wheel.,For the towing rod,There is a laser light receiving portion attached via a pole at the upper position of the lower edge of the flat plate, and the laser light receiving portion exists on a reference plane drawn by a signal from the light emitting portion. As described above, a control mechanism for performing a leveling operation while raising and lowering the leveling plate with the gage wheel as a fulcrum by expansion and contraction of the leveling control cylinder unit is provided.Providing towed leveling machines.
[0005]
  A pole supporting the light receiving portion may be attached to the pulling rod and located in the upper space of the lower edge of the flat plate.
[0006]
  The traction rod is divided into a traction rod main body and a traction rod base, the traction rod base is fixed to the machine frame of the working machine, and a leveling plate is fixed to the lower part of the traction hook base. A base support plate, a lower link support plate, and a traction rod support plate are each supported by a support shaft and attached to the machine frame. Each of the base support plate, the lower link support plate, and the traction rod support plate includes a second support plate. Shaft holes for the support shafts are formed, and the second support shafts are inserted into the shaft holes for the second support shafts so that their positions are fixed. The heel body is rotatably supported by the traction fulcrum shaft on the base support plate and the traction heel support plate so that the heel body can stand up in a vertical plane including the work traveling direction. In the standing state, the traction rod support formed on the traction rod body and the traction rod support plate The traction rod support shaft is inserted into the shaft hole for the shaft so that it can be attached to the upper link of the tractor, and it is attached to the lower link of the tractor with a lower link mounting cross shaft attached to the tip of the lower link support plate It is good also as a structure which enables.
[0007]
In the next invention, the side plate of the flat plate is configured to be movable in a vertical plane along the work width direction, in a vertical plane in the work progress direction, or in a plane oblique to these planes. It is characterized by.
Therefore, it is possible to prevent the soil from coming to only the desired side during leveling work, and when there is a lot of soil, the soil can escape to the side of the leveling plate. Can be reduced.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. In these drawings, symbol T denotes a tractor, and symbol P denotes a leveling work machine mounted in a towing type. The leveling work machine P includes a towing rod 10 having a length extending along the work traveling direction. In addition, a hitch portion 11 for mounting on a hitch portion h of the tractor T is provided at the tip position, and extends from this portion toward the rear in the direction opposite to the work traveling direction.
The tow rod 10 has a curved shape that draws an arc that is substantially similar to the letter “T” in a side view except for the hitch portion 11, and the tow rod 10 has a hollow square cross-sectional shape. The largest bulge in the central part has a shape that also projects in the width direction, and this overhanging part is the earth pressure when the soil is raised due to the cutting work during leveling work, as will be explained later The pressure receiving part 12 which receives is formed. The pressure receiving portion 12 can be replaced with a plate-like wing in order to obtain a required area, or an enlarged portion protruding in the width direction can be formed.
[0012]
Further, the end of the traction rod 10 on the side opposite to the tractor, in other words, the rear end 15 is integrated with the back surface of the flat plate 13 to be described. That is, the leveling plate 13 is wide in the work width direction, and can be used to cut and carry the surface of the field while moving, and a plastic plate 13A is attached to the surface to improve soil separation. It has been.
Further, there are side plates 14 on both sides of the flat plate 13 in order to reduce the amount of overflow when carrying out the cut by the flat plate, and the soil is accommodated in a space surrounded by the flat plate 13 and the both side plates 14. Can be done.
[0013]
The height of the side plate 14 is higher than the upper edge portion 13X of the flat plate 13, and the increased portion is an enlarged portion 14X. The enlarged portion 14X prevents the soil being carried from overflowing in the working width direction of the flat plate 13.
As the height of the upper edge portion of the enlarged portion 14X is higher, it is more convenient from the viewpoint of soil carrying work. However, if too much soil is held, the pressure receiving portion 12 formed on the towing rod 10 receives interference from the soil. Therefore, it is necessary to determine the height in consideration of such points.
[0014]
The rear end portion 15 of the pulling rod 10 is integrated with the flat plate on the back surface of the flat plate 13, and is disposed along the working width direction on the back side of the flat plate 13, and on both sides thereof. A flange 21 that projects and is fixed to the rear end 15 of the traction rod 10 is integrated with a bolt or the like on the rear side of the flat plate 13.
[0015]
  On both sides of the traction rod 10, there are a plurality of plates 22 whose ends are fixed to a flat plate at symmetrical positions in the working width direction with the traction rod 10 as the center. The component to be supported is supported. That is, a box-shaped arm receiving box 23A is fixed to the plate 22, and the insertion end portion 23B of the L-type tine support arm 23 in the side view is located with respect to the arm receiving box 23A. The mounting height can be selected by selecting one of the plurality of bolt holes 23X. At the support end 23C of the tine support arm 23, tine shafts 24 arranged in one or two rows along the working width direction are supported. Since the tine shaft 24 uses a square pipe or the like, a bearing is provided for the support end 23C of the tine support arm 23.26It is attached in a state allowing rotational movement via The tine support shaft 24 is divided at the center in the width direction to cover approximately half of the working width.
[0016]
The tine support shaft 24 is provided with tines 25 that are regularly attached at equal intervals. In the case of the tine support shafts 24 provided in two rows, the tine support shaft 24 is rearward with respect to the tine support shaft on the front side in the working direction. The tine 25 of the tine support shaft 24 has a plover-type arrangement.
In the tine shaft 24, a tension spring 24X is interposed between the upper end edge 13X portion of the flat plate 13 and the tine shaft 24, so that the ground contact end portion 25A of the tine 25 can always bite into the field scene. Habit is given to posture. In other words, the habit is given so that a load is applied from the front of the tine 25 in the direction of work progress. Therefore, when the tractor moves backward during the operation, the tine 25 does not resist against the habit, and the grounding end 25A of the tine does not jump up due to the tensile force of the tension spring 24X and is not damaged by the overload. ing.
[0017]
  In addition, there are two flange-shaped back surfaces of the flat plate 13.Bearing partThis is providedOn the bearingThe end of the support arm 28 of the gage wheel 27 using a tire at the end is pivotally supported by a pin 28A, and is allowed to swing in a vertical plane. In other words, the gage wheel 27 can move up and down.
[0018]
Further, the left and right support arms 28 are integrated by a connecting member 29 arranged along the width direction. One of these left and right support arms 28 has an extension 28X attached at its end to the support arm 28 with a pivot pin 28A. The left and right support arms 28 and 28 including the extension 28X have the same length. A shaft 27A of the gage wheel 27 is supported by the extension 28X through the extension 28X, and the end of the rod 32 of the tilt cylinder 31 is attached to the shaft 27A via a bearing 27B. A rod 27E of a tilt cylinder 27D is connected to the bearing 27B. The tilt cylinder 27D is attached to the end of the support arm 28 by an attachment arm 27F so that the bearing 27 can be moved independently in the vertical direction. In other words, the extension portion 28X of the support arm 28 is mounted so as to be swingable via the bearing 27B and the pin 28A, and thereby the flat plate 13 can be tilted along the working width direction. The tilt mechanism 30 is configured to be used for the work of cutting the sloping ground to form a horizontal plane.
The tilt cylinder 31 performs a tilt operation, and the horizontal tilt of the leveling plate 13 can be automatically or artificially controlled by a signal from a horizontal sensor mounted on the tractor T. ing.
[0019]
An end portion of a cylinder 41 of a leveling control cylinder 40 that is expanded and contracted by a hydraulic pressure supplied from a control mechanism 50 described later is attached to the upper portion near the rear end portion 15 of the traction rod 10 in a pivoted state. Further, the rotation accompanying the expansion and contraction movement of the leveling control cylinder 40 is allowed. The end of the rod 42 of the leveling control cylinder 40 is attached by a pivot pin 43A to a swing arm 43 whose end is attached to the center of the connecting member 29. The rotation accompanying the expansion and contraction motion of the cylinder 40 is allowed. The swing arm 43 is attached to the back surface of the leveling plate 13 by the pivot pin 41A in the same manner as the support arm 28. Therefore, the expansion / contraction operation of the leveling control cylinder 40 is performed by the swing arm 43 and the connecting member 29. So that the amount of biting of the lower edge 13Y of the leveling plate 13 can be controlled by moving the gauge wheel 27 closer to or away from the leveling plate 13. It has become.
[0020]
When the leveling control cylinder 40 is extended (the rod is extended with respect to the cylinder), the gage wheel 27 is moved away from the leveling plate 13, so that the working machine is operated with the gage wheel as a fulcrum. The lower end edge 13B of the flat plate 13 in particular, the lower end edge 13B of the flat plate 13 is depressed and lowered, and the amount of sticking of the lower end edge 13B of the flat plate 13 with respect to the field surface increases. The part can be cut.
[0021]
Further, when the leveling control cylinder 40 is contracted, the gage wheel 27 is attracted toward the leveling plate, and the lower end edge 13Y of the leveling plate 13 is lifted and raised with this as a fulcrum, and the leveling plate with respect to the field surface. The amount of piercing at the lower edge of 13 can be reduced, in other words, the amount of cutting can be reduced and the soil can be carried into the concave portion of the field.
[0022]
In order to perform the control as described above, the leveling control mechanism 50 is mounted on the tractor T, and a part of the leveling control mechanism 50 is mounted on the work machine P. The reference plane drawn by the laser light emitting unit 51 installed outside the farm field. A light receiving portion 52 that receives the H signal is attached to the tip of the pole 53. The pole 53 can be expanded and contracted by a hydraulic cylinder 53X so that the position of the light receiving portion 52 can be appropriately selected. The upper and lower portions of the pole 53 are telescopic. It has become.
[0023]
The leveling control mechanism 50 includes various control devices that process control signals obtained from the light receiving unit 52 of the pole 53. That is, the pole 53 is installed on the mounting seat 53A on the pulling rod 10 and is considered to be positioned on the lower end edge 13Y of the flat plate 13 in side view, and further, the reference plane It is also considered not to be disturbed when receiving the H signal.
The signal of the reference plane H received by the light receiving unit 52 is input to a control circuit 54 represented by MPLC or the like. In the control circuit 54, it is determined whether the height position of the light receiving portion 52 is higher or lower than the reference plane H, and further, how much deviation is generated with respect to the reference plane H.
[0024]
The control signal obtained from the control circuit 54 is input to a valve driver 55 of a hydraulic circuit that controls expansion and contraction of the leveling control cylinder 40. The position of the switching valve 56 for controlling the flow of pressure oil in the hydraulic circuit is selected by the output of the valve driver 55. The switching valve 56 is a three-position / four-port switching valve, and includes a fixed position 56A, an extended position 56B, and a contracted position 56C. One of these positions is selected by the valve driver 55. A pressure oil supply (return) line 58 from a hydraulic pump 57 is connected to the switching valve 56. The pressure oil supply line 58 is further extended to extend the expansion chamber 41 and the expansion / contraction chamber of the leveling control cylinder 40. The leveling control mechanism 50 is configured to be connected to each of 42.
[0025]
A control valve for controlling the amount and speed of pressure oil to be supplied is incorporated in the pressure oil supply pipe 58, but the description thereof is omitted.
[0026]
In the embodiment of the next invention, the traction rod 10 is divided into two in the longitudinal direction and is constituted by a traction rod base 10A and a traction rod main body 10B. The traction rod base 10 </ b> A is fixed to and integrated with the constituent members of the machine frame P <b> 1 of the work machine P.
The rear end 15 of the traction rod base 10A fixedly supports the back surface of the flat plate 13.
The traction rod base portion 10A and the rear end portion 15 are integral and are not limited to the shapes of both.
In the machine frame P1, a boss portion 71A for supporting the support shaft 71 is formed, and the support shaft 71 can be removably inserted into the boss portion 71A.
The machine frame P1 may be a member constituting a leveling work machine, and may be, for example, a traction rod base 10A that forms the traction rod 10.
[0027]
The support shaft 71 is axially supported by a support shaft 71 common to the three members described below. Since the three members are arranged symmetrically in the width direction of the work machine P, only one of them will be described as a representative. Of the three members, a substantially triangular base support plate 81 is attached to the outer position farthest from the center in the width direction of the work machine by the support shaft 71, and the base support plate 81 has a shaft. In addition to the hole 81A, a shaft hole 82A through which the second support shaft 72 can pass is formed.
The reason why the base support plate 81 has a substantially triangular shape is to form the shaft hole 82A through which the second support shaft 72 passes, and is not restricted by the shape. It is sufficient if the position of the hole can be secured.
[0028]
  Further, a shaft hole 83A is bored at a tip position of the base support plate 81, in other words, a position farthest from the support shaft 71, and a traction rod support for supporting a traction rod main body 10B described later.pointThe shaft 73 can be inserted.
[0029]
Further, there is a lower link support plate 91 supported by a support shaft 71 inside the base support plate 81, and a lower link mounting support port 91A is formed in a state where the lower edge position is opened. The lower link support plate 91 is supported by the support shaft 71 and can move in the rotational direction within a vertical plane.
[0030]
  Further, a plurality of lower link positions on a circle centered on the support shaft 71Corresponding holeIt is worn.Multiple lower link position corresponding holesLower link position corresponding hole in the drawing91Al, 91Ah, 91AmThe lower link position can be selected from the upper, middle and lower positions. This can be selectively used when it is necessary to move the position of the lower link L of the tractor T in the vertical direction in the state of leveling work. When the selected position is fixed, the insertion position of the second support shaft 72 is set to the lower link position corresponding hole.91Al, 91Ah, 91AmSelect one of the holes, for example, the lower link position corresponding hole91Al, 91Ah, 91AmOf these, the highest hole 91When Ah is used, the lower link L can be supported at the highest position. Also, hole 91By using Al, the lower link can be supported at the lowest position. Middle hole 91By using Am, the lower link L can be supported at the intermediate position at the intermediate position.
[0031]
  Of the three members, on the innermost side, the traction rod support plate 100 that supports the traction rod main body 10B is inserted into the shaft hole 101A in which the aforementioned support shaft 71 is formed in the traction rod support plate 100. The base support plate 81 and the lower link support plate 91 are attached to the machine frame P1 together with the lower link position corresponding hole.91Al, 91Ah, 91AmThe lower link position fixing hole 102A is bored in a positional relationship overlapping with.
[0032]
  The traction rod support plate 100 has a hole 83A through which the support shaft 71 is inserted and a shaft hole 101A common to the hole 83A, and a lower link corresponding hole of the lower link support plate 91.91Al, 91Ah, 91AmA hole 102 </ b> A through which the second support shaft 72 can be inserted is formed. Further, the tow rod main body 10B is attached to the end of the tow rod support plate 100 at a position farthest from the shaft hole 101A.supportA shaft hole 104A is formed, and the shaft hole 104The traction rod main body 10B is moved in the vertical plane by the traction rod support shaft 74 inserted through A.Support to stand up.
[0033]
  Further, a fulcrum shaft hole 103A serving as a rotation fulcrum of the tow rod main body 10B is formed at an intermediate position between the shaft hole 104A and the shaft hole 102A.Towing rodThe fulcrum shaft 73 is passed throughSupport the tow rod main body 10B so that it can move in the rotational direction within the vertical plane,So that the towing rod 10B can stand up or fall to a levelBecome.
[0034]
  There is a hook 110 that is outside the base support plate 81 and pivotally attached to the lower link support plate 91 by a pivot pin 75, and this hook 110 is connected to the cross shaft S.Handle113, the claw 112 integrated with the cross shaft S can catch the pin 92 provided on the lower link support plate 91, and when the handle 113 is raised, the hook 110 is The state where the handle 113 is restrained and the pin 92 is caught by the claw 112 is maintained.
[0035]
  The traction rod fulcrum shaft 73 isfulcrumShaft hole 103It is detachable with respect to A and is pivotally attached to the tow rod main body 10B at the same time.In the shaft holeThe traction rod main body 10B can be attached to the traction rod support plate 100 by using this traction rod fulcrum shaft 73.fulcrumShaft hole 103A,And the shaft hole pivotally attaching the tow rod main body 10BThis is done by charging. Further, when the tow rod main body 10B is attached to the tow rod support plate 100, the tow rod main body 10B can be freely moved in the rotating direction, and in the upright state, it is raised by a hook or the like not shown. The state can be maintained. A hook receiver is provided on the side of the tow rod main body 10B with respect to this hook.
[0036]
  Then, by placing the tow rod main body 10B in an upright state, the tractor can be mounted by a three-point link hitch. That is, the traction rod support shaft 74Is removed, and the upper link U is attached by passing this through the shaft hole 104A together with the mounting hole provided at the end of the upper link U. Further, the lower link L is inserted from below the support port 91A in the lower link support plate 91 in a state where both ends of the cross shaft S are captured, and the handle 113 is rotated and moved so that the handle 113 stands up around the support shaft 121. The handle 113 is restrained by the hook 110. In this state, the pin 92 is caught by the claw 112 so that the rotation of the cross shaft S, that is, the drop off from the cross shaft support plate 91 is prevented.
[0037]
In this state, the tractor T is equipped with a towing type flat work machine P, in other words, the hitch is directly mounted, and the tractor has a lift function to move the work machine P up and down. This can be done by using the and can move up and down in the field and can be lifted up when running on the road, so there is no interference with getting over the fence, leaving the field, or getting into the field. It is.
[0038]
In the above description, the support shaft 71, the second support shaft 72, the traction rod fulcrum shaft 73, the traction rod support shaft 74, and the like are provided with their end portions, more specifically, the retaining pin at the most advanced position in the insertion direction. Pin holes that can be inserted are formed so that the states of various support shafts can be constrained or released.
Accordingly, if the support shaft 71, the second support shaft 72, the traction rod support shaft 73, and the retaining pin of the traction rod support shaft 74 are removed, the base support plate 81, the lower link support plate 91, the traction rod support plate 100 can be removed, and there is no hindrance in leveling work by towing work.
[0039]
Next, work using the towing type leveling machine of the present invention will be described. First, a laser light emitting unit 51 is installed at an appropriate location outside the field to emit light. Usually, the reference plane H is drawn in the air by rotating the light emitting unit. Since the light emitting unit 51 emits light while rotating, if the light emitting surface drawn by the locus is parallel to the horizontal plane, it is possible to form a horizontal plane along the reference plane, and the light emitting surface has a slope angle (gradient). If so, it is possible to form a plane with a gradient.
When the leveling work machine pulled by the tractor T is moved along the horizontal reference plane H so that the light receiving section 52 always moves, in other words, the tractor so that the light receiving section 52 follows the reference plane H. If the T and the work implement P can move, the field surface becomes a plane parallel to the reference plane H.
[0040]
Further, if there is unevenness on the surface of the field and no control is applied to the work implement P, the movement trajectory of the tractor T becomes a flat locus along the unevenness. However, by controlling the light receiving unit 52 to always move along the reference plane H, the concave-convex plane can be formed in parallel with the reference plane H. The vertical width of the light receiving unit 52 associated with the unevenness on the surface of the field is detected as a deviation, the deviation is calculated by the control circuit 54, and the lower edge of the leveling plate 13 is moved up and down according to the deviation.
[0041]
For example, when the deviation of the light receiving unit 52 is positive (in a state higher than the reference plane), the field plane is convex, so the leveling plate 13 (the lower end edge thereof) is lowered to increase the amount of soil cutting. For this purpose, the “lowering amount” is calculated in the control circuit 54 in relation to the deviation, and the valve driver 55 is driven according to the calculated value. Since the field surface is high, the extension position 56A of the switching valve 56 is selected, and pressure oil is supplied to the extension chamber 41 so that the control cylinder 40 is extended. Along with this extension, the leveling plate 13 is lowered with the gage wheel 27 as a fulcrum, and the posture is changed so that the lower edge 13Y of the leveling plate 13 bites more into the field scene.
And it is performed so that it may become the work which cuts the convex part of a field so that the deviation with reference plane H of light receiving part 52 may be set to "0".
At this time, even if there is unevenness in the field, since the light receiving unit is located directly above the lower end edge 13Y of the flat plate 13, the deviation can be accurately detected.
[0042]
Further, in a state where the concave portion is present in the field and the light receiving portion 52 is lower than the reference plane H, in other words, in a negative deviation state, even if the lower end edge 13Y of the flat plate 13 is not separated from the surface, the soil of the convex portion is removed. The height of the lower edge is increased because it is necessary to cut and carry the soil into the recess. For this purpose, the leveling control cylinder 40 is contracted to bring the gauge wheel 27 closer to the leveling plate 13. In this operation, the degree to which the leveling plate 13 is raised is calculated by the control circuit 54, and the contracted position 56B is selected as the position in the switching valve 56 according to the deviation, and the state is maintained for the required time length. .
[0043]
By adjusting and selecting the height of the lower edge 13Y of the flat plate 13 with respect to the field, the ground surface is formed in a target plane while moving and moving by adjusting the amount of soil cut and the amount of soil carried.
That is, the light-receiving unit 42 is controlled to be positioned in the reference plane H by moving the flat plate 13 up and down so that the deviation becomes “0”.
The leveling plate 13 is used for cutting and carrying soiling work. Since the leveling plate 13 is provided with side plates 14 on both sides thereof, the earthing operation is carried out in a space surrounded by the leveling plate 13 and the side plates 14 and 14. Can contain and move the soil. At this time, the side plate 14 is formed with an enlarged portion 14A which is higher than the upper edge 13X of the flat plate 13, so that the capacity of carrying the soil is increased and the soil is overflowing on both sides in the moving direction. I do not put out. This is extremely useful when performing work on the verge.
[0044]
Further, the tine 25 (the lower end 25A) can bite into the surface of the field in the work progress direction, but in the retracted state, the tine 25 jumps up according to the tension spring 25, thereby avoiding a load.
[0045]
Further, the light receiving portion 52 attached to the pole 53 is located on the side surface of the lower end portion 13Y of the flat plate 13 so that the unevenness of the field becomes a deviation obtained by the light receiving portion 52, and the unevenness of the field is accurately determined. The state can be detected.
[0046]
In particular, when the leveling plate 13 holds the ground that exceeds the traction ability of the tractor, when the soil rises high, the pressure receiving portion 12 provided at the center of the traction rod 10 is pushed up by the earth pressure. Then, the load applied to the leveling plate 13 can be instantaneously released by lifting the lower end edge 13Y of the leveling plate 13. As a result, the tractor T does not get stuck during the work, and the work can be continued.
[0047]
There is no overflow of the soil to the sides during the soil, especially at the shore, so that the entire field is ensured to be level.
[0048]
In the above description, the case where the field surface is set in a horizontal state has been mainly described. However, by adding a gradient to the reference plane H drawn by the light emitting unit 51, it is possible to finish the field surface in consideration of drainage and the like. .
[0049]
In the above description, the present invention is expressed as a towing type leveling work machine, but includes a tractor because it is a work machine to be pulled by a tractor in a working state.
[0050]
In addition, when the work implement is moved out of the field or moved into the field due to the movement between the fields, the lift mechanism of the tractor can be used if the work implement is mounted directly on the tractor. The inconvenience at the time of movement which the tow type work machine has can be eliminated.
[0051]
【The invention's effect】
As is clear from the above description, the towing type leveling machine according to the present invention is pulled by a towing rod with respect to the tractor and includes at least a leveling plate and a tine. Has a side plate along the working direction and along a vertical plane, and this side plate has an overhanging upper edge that is higher than the upper edge of the flat plate, and the tine is regularly arranged on the tine support shaft. There is an array of tine rows, and this tine support shaft is given a habit of rotating in the direction to avoid this against the load applied to the tine from the back side. There is a mounted gage wheel, and a hydraulic cylinder unit that raises and lowers the leveling plate with a grounding point of the gage wheel as a fulcrum is a frame of the work machine including the support arm and the traction rod. of The working machine frame including the towing rod has a laser light receiving unit attached via a pole at an upper position of the lower edge of the flat plate, and a signal from the light emitting unit is provided. The leveling operation is performed while raising and lowering the leveling plate with the gage wheel as a fulcrum by expansion and contraction of the leveling control cylinder unit so that the laser light receiving portion exists on the drawn reference plane. As a result, the height of the flat plate is controlled by selecting the angle to the ground of the support arm of the gage wheel by the expansion and contraction of the hydraulic cylinder unit, and the amount of soil cut is selected and the field surface is selected. Can be leveled. In addition, since the movement trajectory of the lower edge of the flat plate is performed on a parallel plane with respect to the reference plane drawn by the laser beam, it is possible to form a very accurate plane, which is particularly beneficial for the formation of paddy fields.
[0052]
  In addition, the towing rod has an arcuate shape that extends backward from the hitch end of the tractor, and has a pressure receiving portion that extends in the width direction, and the other end extends to the back of the flat plate, Since the earth pressure is applied to the pressure receiving part of the traction rod when the ground cut by the leveling plate rises, the pressure receiving part of the traction rod is pushed by the pressure of the rising soil when the amount of soil is large. The overload can be released by raising the flat plate itself. Furthermore, since the light receiving portion supported by the pole is attached to the pulling rod and is located in the upper space at the lower edge of the flat plate, the flat plate can be surely drawn by the laser light. It is possible to move in parallel and form an accurate flat field surface. And the side plate of the flat plate can be moved in a vertical plane along the work width direction or in a vertical plane in the work progress direction. The cutting can be prevented from approaching, and when there is a lot of cutting, the soil can escape to the side of the leveling plate, and the load can be reduced. Since it is possible to give an inclination angle to the flat plate, the work to cut the slope and make it flatPossibleIt is. As described above, the present invention can efficiently and accurately contribute to the formation of a flat field even in a large-scale field.
[0053]
Furthermore, by placing the traction rod in an upright position from the working posture around the traction rod fulcrum shaft provided on the traction rod, the upper link is attached to the traction rod support shaft and the lower link support plate is used to lower the traction rod. Since the link can be attached, the work implement can be attached to the tractor by the direct attachment type, which is convenient for movement in a non-working state, small turn movement, and the like.
[Brief description of the drawings]
FIG. 1 is a side view of a traction type leveling machine according to the present invention.
FIG. 2 is a plan view of a towing type leveling machine according to the present invention.
FIG. 3 is a rear view of a towing type leveling machine according to the present invention.
FIG. 4 is an enlarged side view of four parts in FIG.
FIG. 5 is a side view showing the relationship between the flat plate and the swing arm.
FIG. 6 is a perspective view of a portion for attaching a traction rod and a flat plate.
FIG. 7 is an explanatory slope view of a rear end portion of a support arm.
FIG. 8 is a partial slope view showing the relationship between a tine shaft and its supporting arm.
FIG. 9 is an explanatory diagram of a control mechanism.
FIG. 10 is a side view of a traction rod and a flat plate.
FIG. 11 is a side view of an exploded state of the traction rod and the flat plate.
FIG. 12 is a plan view of a traction rod and a flat plate.
FIG. 13 is an exploded side view of detachable support plates.
[Explanation of symbols]
  T tractor
  P leveling machine
  10 Towing rod
  10A Towing base
  10B Towing rod body
  11 Hitch
  12 Pressure receiving part
  13 Flat plate
  13A Plastics board
  13X upper edge
  13Y Bottom edge
  14 Side plate
  14X Enlarged part
  15 Rear end of towing rod
  21 Flange
  22 Plate
  23 Tyne Support Arm
  23A Arm receiving box
  23B insertion part
  23C Support end
  23X hole
  24 tine shaft
  24X tension spring
  25 Tyne
  25A bottom edge
  26bearing
  27 Gauge Wheel
  27A axis
  27B Bearing
  28 Support Arm
  29 Connecting members
  30 Tilt cylinder
  31 cylinders
  32 rods
  40 Leveling cylinder
  41 cylinders
  42 Rod
  43 Swing Arm
  50 Control mechanism
  51 Light emitter
  52 Receiver
  53 pole
  54 Control circuit
  55 Valve driver
  56 selector valve
  57 pump
  58 Pressure oil supply pipeline
  71 Support shaft
  72 Second support shaft
  73 Traction fulcrum shaft
  74 Traction rod support shaft
  81 Base support plate
  81A Shaft hole
  82A Shaft hole
  83A Shaft hole
  91 Lower link support plate
  91A Lower link support port
  92 pins
  100 Towing rod support plate
  101A Shaft hole
  102A Lower link position fixing hole
  103A fulcrum shaft hole
  102A Shaft hole
  110hook
  112 nails
  113handle

Claims (3)

Is pulled by the traction rod relative to the tractor, at least equalizing plates in tractor Hitoshitaira working machine Ru provided with tines in a row,
The traction rod has a pressure receiving portion that is widened toward the rear from the hitch end of the tractor, and the other end extends to the back of the flat plate and is integrated with the flat plate. The earth pressure is applied to the pressure receiving part of the traction rod when the ground cut by the leveling plate rises,
The flat plate is composed of a curved plate in a side view , and has side plates along the vertical direction and along the working direction at both ends in the width direction .
The side plates has an enlarged portion was projecting higher than the upper edge of the equalizing plates,
Further, behind the tine row, there is a gage wheel attached via a support arm having one end pivotally attached to a flat plate ,
One end of the leveling control cylinder unit that raises and lowers the leveling plate with the grounding point of the gauge wheel as a fulcrum , and the other end on the side of the support arm of the gauge wheel. Pivoted ,
The traction rod has a laser light receiving portion attached via a pole at an upper position of the lower edge of the flat plate, and the laser light is placed on a reference plane drawn by a signal from the light emitting portion. And a control mechanism for performing leveling work while raising and lowering the leveling plate with the gage wheel as a fulcrum by expansion and contraction of the leveling control cylinder unit so that there is a light receiving portion. Towing type flat work machine. 2. A towing type leveling work machine according to claim 1, wherein a pole supporting said light receiving portion is attached to said towing rod and is located in an upper space of a lower end edge of said leveling plate. The tow rod is divided into a tow rod main body and a tow rod base,
The tow rod base is fixed to the machine frame of the work machine, and the flat plate is fixed to the lower part of the tow rod base,
A base support plate, a lower link support plate, and a traction rod support plate are each supported by a support shaft and attached to the machine frame of the work machine, and the base support plate, the lower link support plate, and the traction rod support plate are respectively A shaft hole for the second support shaft is formed, and the position of each other is fixed by inserting the second support shaft into the shaft hole for the second support shaft. And
The traction rod body is rotatably supported by the traction rod fulcrum shaft on the base support plate and the traction rod support plate so that the traction rod main body can stand up in a vertical plane including the work traveling direction.
When the traction rod main body is in the standing state, the traction rod support shaft can be inserted into the shaft hole for the traction rod support shaft formed in the traction rod main body and the traction rod support plate so that it can be attached to the upper link of the tractor. 2. A towing type leveling machine according to claim 1, wherein the lower link of the tractor can be attached to the lower link of the tractor by a cross shaft for attaching the lower link attached to the tip of the link support plate .

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