JPH0130003Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hand-pushed walking type multiple flood work device.

When multiple submerged working machines are attached to the front of a walk-behind two-wheeled tractor and used for hand-pushing, if the overall gravity of the working machines is smaller than the reaction force of the driving force on the tractor body, The work implement is pushed in the lifting direction, and if the drive reaction force is greater than the drive reaction force, the manual steering handle of the tractor body will be lifted.

However, even if the gravity of the tractor body is constant, the drive reaction force of the tractor body is exceptionally different, for example, when traveling on a general road and when working in a flooded field. Even during flooding work, there will be changes depending on the depth of plowing and the hardness and softness of the soil. It is necessary to adjust the position of the center of gravity of the work implement so that it is in balance with the drive reaction force in the tractor body, and preferably, the adjustment operation must be easily performed.

In addition, the height of the hitch for attaching the work equipment to the tractor body differs depending on the manufacturer and model of the tractor body, and the plowing depth of the flooded field also changes when used for flooded work.
If the installation height of the work equipment cannot be adjusted in accordance with these differences, it will not always be possible to obtain the optimal flooded work effect. Furthermore, when multiple such flooding machines are installed in parallel on the toolbar, if the machines do not float, they will not all fit on the horizontal surface of the flooded field, resulting in optimal flooding. This results in the inability to ensure work effectiveness.

The purpose of the present invention is to provide a hand-pushed walking type multi-flooding work device that can meet these various demands.The specific configuration of the device will be described in detail based on the illustrated embodiment as follows. be.

That is, the figure shows an example of the present invention applied to a multiple-type submerged direct seeding machine, and in Figures 1 to 4, 1 is the body of a walk-behind two-wheeled tractor commonly known as a Taylor or a management machine. Needless to say, this includes an engine 2 and a transmission mechanism 5 (details not shown) that transmits the rotational power of the engine to the drive shaft 4 of the wheels 3.
is equipped. Reference numeral 6 designates the manual steering handle of the aircraft 1, which allows the direction of movement from the aircraft 1 to be changed 180 degrees forward or backward.

FIG. 1 shows the entire manual push condition, in which the support bar 7 is extended and protruded forward from the tractor body 1 in a substantially horizontally installed condition. Reference numeral 8 denotes a lifting adjustment device inserted and fixed between the rear end of the support bar 7 and a hitch 9 that can be attached to and detached from the body 1;
As is clear from FIG. 5, it consists of a four-bar parallel link mechanism that swings, and when the steering screw handle 10 cross-connected to this link mechanism is rotated, the adjustment nut 11 that is screwed into engagement with the steering screw handle 10 moves back and forth. The support bar 7 is raised and lowered while maintaining the above-mentioned substantially horizontal state. Reference numeral 12 denotes a plurality of slide adjustment holes opened through the support bar 7, which are arranged at regular intervals over the longitudinal direction (front-back direction).

Reference numeral 13 denotes a mast for attaching the tool bar 14 to the support bar 7, and is made of hollow square pipe material. 15 is a sheath pipe that integrally projects toward the rear from the middle of the upper part of the mast 13;
As is clear from FIG. 7, the mast 13 is thereby stably fitted onto the support bar 7. In other words,
The mast 13 is vertically erected so as to intersect the support bar 7 vertically, so that the mast 13 can slide forward and backward along the support bar 7.

Reference numeral 16 designates a required number of communication holes formed through the sheath tube 15 so as to selectively match the adjustment holes 12 of the support bar 7, and fixing pins 17 are inserted into the matching adjustment holes 12 and the communication holes 16. By inserting the skewer, the mast 13 and the support bar 7 are connected and fixed.
That is, by replacing the fixing pins 17 in the plural adjustment holes 12 and the communication holes 16, the mounting position of the mast 13 with respect to the support bar 7 can be adjusted and fixed.

Reference numeral 18 designates a shaft cylinder fixedly integrated in the middle of the lower part of the mast 13, and a shaft 19 parallel to the support bar 7 passes through this. This parallel shaft 19 faces directly below the support bar 7, and can rotate relative to the shaft cylinder 18 over a certain angular range. Reference numeral 20 denotes a regulating pin for the rotation angle range, which integrally projects rearward from a flange 21 extending midway on the parallel shaft 19. Reference numeral 22 denotes a regulating piece that engages with the regulating pin, and correspondingly projects from the front end of the shaft tube 18. 23 is a retaining pin skewered to the rear end of the parallel shaft 19; 24
Similarly, the seesaw arm is fixedly integrated with the front end of the parallel shaft 19, and as is clear from FIGS.
The lower end portions of the two are respectively locked. Reference numeral 26 denotes a spring receiving rod that integrally projects forward from the upper end of the mast 13, and has an inverted U-shaped frame shape in plan view, and each of the coil springs 25 is attached to both left and right ends of the spring receiving rod. The upper end is locked.

Therefore, the parallel shaft 19 is connected to the shaft cylinder 18 of the mast 13.
4, the seesaw arm 24 moves as shown in FIG. 4, the lengths of both coil springs 25 mutually change, one of them is forcibly compressed, The other will be expanded as well. Due to the restoring elasticity of both coil springs 25, the tool bar 14 is biased so as to always maintain a substantially horizontal state, regardless of the tilted posture of the tractor body 1. All of the submerged direct seeding machines described below fit correctly on the plane,
A suitable seeding action will be achieved.

A pair of left and right hanger stays 27 are fixedly suspended from the middle of the front part of the parallel shaft 19, and clamp fittings 28 of the tool bar 14 are fixed to both lower ends thereof. The tool bar 14 extends along the left and right direction perpendicular to the support bar 7 and its parallel axis 19, is held in a horizontal state by a clamp fitting 28, and is removably fixed with bolts and nuts 29. has been done. Since the tool bar 14 is fixedly integrated with the parallel shaft 19 via the hanger stay 27, when the parallel shaft 19 rotates relative to the shaft cylinder 18 of the mast 13, the tool bar 14
4 also performs a seesaw movement along the left-right direction using the parallel shaft 19 as a fulcrum as shown in FIG.
Reference numeral 30 denotes a ground stabilizing wheel when traveling on a general road, and the upper end of its support shaft 31 is fitted into a receiving tube 32 that projects rearward from the lower end of the mast 13 so as to be able to swing freely. Note that this stabilizing wheel 30 is removed during work in a flooded field.

Reference numeral 33 indicates a plurality of submerged direct sowing machines, which are illustrated in the figure as a multiple type that sows seeds in four rows. Each of the direct sowing machines 33 is in the form of a unit that sows seeds independently of each other, and in FIG. Shoot 35
This is a groove maker attached to the lower end of the groove, and the depth of the groove can of course be adjusted. Reference numeral 37 denotes a float pivotally attached to the front part of the fuselage 34 so as to be freely swingable, and is separate and independent from the groover 36. Reference numerals 38 and 39 refer to a pair of earthen coverrs which are also pivotally attached to the fuselage 34 so as to be able to swing, and which overlap each other from the left and right directions, essentially forming a "C" shape. They are arranged in a staggered manner with their positions shifted in the direction.

Reference numeral 40 denotes a ground driving wheel for belt circulation rotatably supported approximately in the middle of the machine body 34, and its rotational force is transmitted via a gear transmission mechanism 41 to the endless seed conveyance of the seed feeding belt cassette 42. It is transmitted to a belt (not shown). Then, the seeds in the seed hopper 43 are automatically fed upward by the belt and are released from the chute 35. The belt is previously wound around the cassette 42 so that it can circulate, and the cassette 42 is detachably loaded into the body 34 in a so-called cassette-type manner.

Furthermore, 44 is a lifting device for each direct seeding machine 33 itself relative to the tool bar 14, and is composed of a four-bar parallel link mechanism that can swing in the vertical direction.
It is installed at the front end of the fuselage 34. 45, 46
47 and 48 are a pair of vertical arms at the front and rear, and 47 and 48 are a pair of upper and lower horizontal arms, with pivot pins 49 and 5.
0,51,52.
Reference numeral 53 designates a locking pin that extends horizontally through the upper horizontal arm 47, and reference numeral 54 designates a coil spring that is tensioned approximately along the diagonal line of the parallelogram generated by the link mechanism. 34 is always elastically biased in the lifting direction. Reference numeral 55 denotes a spring receiving piece integrally erected from the upper side arm 47, and the upper front end and the lower rear end of the spring 54 are respectively locked to the through pin 56 and the pivot pin 52, respectively. . Reference numeral 57 denotes a ratchet arm which is integrally pivotally connected to the link mechanism so as to be substantially parallel to the length direction of the spring 54, and cooperates with a lock piece 58 which is slidably attached to the ratchet arm. The lifting force of the spring 54 can be fixedly locked. That is, when the key notch 60 of the lock piece 58 is also locked to the locking pin 53 that is engaged with the slide guide elongated hole 59 of the ratchet arm 57, the elevated state of the fuselage 34 is locked. It's getting old.

As shown in the figure, the tool bar 14 is held by the front vertical arm 45 and the clamp fitting 61, and is detachably fixed with bolts and nuts 62.

According to the above configuration, a plurality of slide adjustment holes 12 are formed through the support bar 7 extending forward from the tractor body 1, and a plurality of submerged direct sowing machines 33 are arranged in parallel. Toolbar 14
A sheath tube 15 is fixedly installed on the mounting mast 13, and the sheath tube 15 is fitted with the support bar 7 and can be slid in the front and back direction.The sheath tube 15 has a communication hole 16 that selectively matches the adjustment hole 12. Because it is opened,
By replacing the fixing pins 17 in both holes 12 and 16, even if the drive reaction force in the tractor body 1 changes in size, the center of gravity of the submerged direct sowing machine 33 can be easily and correctly adjusted to a balanced state with this. can do. In other words, when the reaction force of the driving force is large compared to the overall gravity of the direct sowing machine 33, the tool bar 14 of the direct sowing machine 33 is moved forward along the support bar 7, and vice versa. When the tool bar 14 is small, the tool bar 14 can be simply slid backwards, and the two acting forces can be kept in a balanced state and used easily and efficiently.

In addition, when using the field in a flooded field, for example, when the plowing depth is deep, the lifting adjustment device 8 for the support bar 7 is operated by the handle, and the lifting support bar 7 raises the direct seeding machine 33. The installation height of the direct sowing machine 33 is set high, and if it is shallow, the installation height of the direct sowing machine 33 is set low via the support bar 7, which also descends. Therefore, the installation height of the direct sowing machine 33 can be adjusted and changed, and even in relation to the height position of the hitch 9 on the tractor body 1, this means that the direct sowing machine 33 can always be kept at the desired optimum position. The installation height can be adjusted without any problem.

Further, the tool bar 14 on which a plurality of direct seeding machines 33 are installed in parallel can perform a seesaw movement in the left-right direction within a predetermined rotation angle range using the parallel axis 19 with the support bar 7 as a fulcrum. Since the tractor body 1 is horizontally suspended during the flooding work, for example, even if the tractor body 1 changes to an inclined position, it will not be affected at all, and the direct sowing machine 33 will be placed on the horizontal surface of the flooded field. This will maintain the floating state and provide optimal working results without uneven seeding. Furthermore, the first
The symbol L in the figure indicates the distance between the overall center of gravity of the direct sowing machine 33 and the drive shaft 4 of the tractor body 1.

As a structure for adjusting and fixing the mounting position of the mast 13 with respect to the support bar 7, other structures may be adopted instead of replacing the fixing pin 17 as shown in the illustrated example. The flooded direct sowing machine 33 is also just one example of a flooded agricultural machine, and can therefore be used as a fertilizer applicator or other equipment.

As described above, the present invention is a hand-pushed walking type multi-flooding work device that is removably attached to the tractor body 1 equipped with the hand-push steering handle 6 by means of the hitch 9, and extends almost forward from the body 1. The support bar 7 extends in a horizontally installed state, and the rear end of the support bar 7 and the hitch 9 are connected and integrated between the front and rear, so that the support bar 7 can be raised and lowered while remaining in a substantially horizontal state. a vertical adjustment device 8 consisting of a four-bar parallel link mechanism, and a tool bar mounting mast 13 fitted on the support bar 7 so as to be slidable in the front-rear direction in a vertical position intersecting the support bar 7 in the longitudinal direction.
and a parallel shaft 19 that passes through the lower part of the mounting mast 13 so as to be parallel to the support bar 7 and rotatable within a predetermined angular range, and from the parallel shaft 19. A tool bar 14 fixedly suspended horizontally on a hanger stay 27 that hangs integrally so as to extend along the left-right direction perpendicular to the support bar 7 and to be able to see-saw with the parallel shaft 19 as a fulcrum; 14 and a plurality of submerged working machines 33 installed in parallel, it has the effect of meeting all the conventional demands mentioned at the beginning.

That is, at the lower position of the toolbar mounting mast 13, there is a parallel shaft 19 passing through it and the parallel shaft 19.
The tool bars 14 of the submerged work machine are installed in parallel in a multi-unit manner via hanger stays 27 that hang down from the tool bars 14.
is fixedly suspended horizontally, and its mounting mast 13 is attached to a support bar 7 extending forward from the tractor body 1.
Since the mantle is fitted so that it can be slid freely in the front and back direction, the center of gravity of the submerged work machine can be adjusted stably and reliably at all times by adjusting the slide so that it is in equilibrium with the drive reaction force in the tractor body 1. Although the tractor body 1 is a push-pull type, the steering handle of the tractor body 1 can be operated easily and easily, and the tractor body 1 can be used for general road walking or flood work. There is no need to stack separate balance weights on the tractor body 1 or to reload them.

Further, a lift adjustment device 8 for the support bar 7 is inserted and integrated between the rear end of the support bar 7 and the hitch 9 relative to the tractor body 1. Since it consists of a four-bar parallel link mechanism that raises and lowers the support bar 7 in a horizontal state, the installation height of the hitch 9 may differ depending on the manufacturer or model of the tractor body 1, and it may be difficult to install the hitch 9 in a flooded field. Even if the plowing depth or the hardness of the soil changes, the installation height of the submerged work machine can be adjusted by raising and lowering the support bar 7 using the lifting adjustment device 8 accordingly. , an optimal work effect that is not affected by the conditions in a flooded field, and the effect that it can be attached to and detached from various tractor bodies 1 without any trouble can be achieved.

Furthermore, in the present invention, a parallel shaft 1 parallel to the support bar 7 is provided at the lower part of the tool bar mounting mast 13.
9 is penetrated so as to be able to rotate within a predetermined range of angles, and the tool bar 14 extends in the left-right direction from the parallel shaft 19 to the hanger stay 27 fixedly suspended. The toolbar 14 is also fixedly suspended horizontally so that it can see-saw around the parallel shaft 19 as a fulcrum.
When working with a plurality of flooded working machines installed in parallel, even if the tractor body 1 tilts due to the conditions of the flooded field, the entire working machine can operate in a floating manner without being adversely affected by this. As a result, it always remains stable and stable on the horizontal surface of the flooded field, and the optimum working effect can always be obtained.

[Brief explanation of the drawing]

The figure shows an example of the implementation of the present invention applied to a multiple type submerged direct seeding machine. Figure 1 is an overall schematic side view of the machine in use, and Figure 2 is a partial cutaway showing the tractor body omitted. FIG. 3 is an enlarged plan view, FIG. 4 is an enlarged front view in a tilted position corresponding to FIG. 2, FIG. Figure 6 is X-X in Figure 3.
FIG. 7 is an enlarged cross-sectional view of a partially cutaway section taken along the line, FIG. 7 is a cross-sectional view taken along line Y-Y in FIG. 6, and FIG. 8 is an enlarged side view of the submerged direct seeding machine. 1... Tractor body, 4... Drive shaft, 7...
Support bar, 8... Lifting adjustment device, 12... Adjustment hole, 13... Mounting mast, 14... Tool bar,
16...Communication hole, 17...fixing pin, 19...parallel shaft, 24...seesaw arm, 33...flooding direct seeding machine, 44...lifting device.

Claims (1)

[Claims for Utility Model Registration] A support bar 7 that is detachably attached to a tractor body 1 equipped with a manual steering handle 6 by a hitch 9 and extends forward from the tractor body 1 in a substantially horizontal construction state; A lifting adjustment device 8 consisting of a four-section parallel link mechanism, which is connected and integrated between the rear end of the support bar 7 and the hitch 9, and is capable of lifting and lowering the support bar 7 while keeping it in a substantially horizontal state. and a tool bar mounting mast 13 which is fitted onto the support bar 7 in a vertical position vertically intersecting the support bar 7 so as to be slidable in the front-rear direction.
and a parallel shaft 19 that passes through the lower part of the mounting mast 13 so as to be parallel to the support bar 7 and rotatable within a predetermined angular range, and from the parallel shaft 19. A tool bar 14 fixedly suspended horizontally on a hanger stay 27 that hangs integrally so as to extend along the left-right direction perpendicular to the support bar 7 and to be able to see-saw with the parallel shaft 19 as a fulcrum; 14 and a plurality of flooded work machines 33 installed in parallel.