JP5033145B2 - Leveling member for rotary tiller - Google Patents

Description

  The present invention relates to a leveling member used for a rotary tiller provided in a walking work machine or a riding tractor.

For example, when a rotary working device is provided in a walking work machine, as disclosed in Patent Documents 1 and 2, the cover (FIG. 1 of Patent Document 1 of FIG. 1) of the rotary tiller (FIG. 1 of Patent Document 1) is used. 20) A horizontally-long rectangular leveling member (21 in FIGS. 1 and 2 of Patent Document 1) may be connected to the rear end of the front view.
Thereby, the soil cultivated by the rotary tiller is received by the leveling member, and a leveling surface is formed by the lower side portion of the leveling member (leveling operation).

As described above, against the leveling work that forms the soil cultivated by the rotary cultivator in a flat shape, the soil cultivated by the rotary cultivator is pushed to the right and left side, and the rotary cultivator There is a erection work to form a ridge on the right and left lateral sides of the frame. When performing the uprighting work, remove the leveling member such as Patent Documents 1 and 2 from the rotary tiller, and the leveling member as disclosed in Patent Document 3 (14 in FIG. 2 of Patent Document 3), Connect to the rear of the rotary tiller.
As a result, the soil cultivated by the rotary tiller is pushed to the right and left lateral sides by the leveling member, so that the right and left lateral sides are laid (the right and left lateral wall portions, Is formed).

JP-A-6-153604 JP-A-6-153602 JP 2003-52202 A

In the above conventional walking type work machine, it is necessary to prepare two kinds of leveling members corresponding to each of the leveling work and the uprighting work, and it is necessary to replace these leveling members according to each work. There is room for improvement in terms of cost and workability.
An object of the present invention is to provide a leveling member for a rotary tiller that is cost-effective and has good workability.

[Configuration of the first invention]
In order to achieve the above object, in the invention according to claim 1 of the present invention,
It has flexibility, its upper end is provided with a horizontally long flat plate connected to the rear end of the cover of the rotary tiller, and is arranged side by side in a horizontal posture along the lower side of the flat plate Two support plates made of metal are provided so that the posture can be freely changed to a state of being attached and a state of being attached to the horizontal center portion of the flat plate in a vertical posture, and below the rear end portion of the cover. A portion between the support plates in the lower side portion of the flat plate is configured to be detachable to the fixing portion provided in the rotary tiller so as to be positioned.

[Action and effect]
When performing leveling work according to the present invention, the lower side of the flat plate is removed from the fixed part of the rotary tiller, and two metal support plates are arranged side by side in a horizontal orientation along the lower side of the flat plate. Attach to the state.
As a result, the lower side of the flat plate looks like it hangs down from the rear end of the cover of the rotary tiller. At the same time, a flat surface is formed by the lower side of the flat plate that contacts the field. At this time, the two support plates along the lower side portion of the flat plate play a role like weights, and fluttering of the lower side portion of the flat plate is suppressed, so that the flat surface is stably formed.

In addition, when performing the uprighting work according to the present invention, the portion between the two support plates on the lower side of the flat plate is connected to the fixed portion of the rotary tiller, and the two metal support plates are connected to the horizontal center of the flat plate. Attach it vertically to the part.
As a result, when the soil cultivated by the rotary tiller is received by the flat plate, the horizontal center portion (lower side portion) of the flat plate does not move backward (the portion between the two support plates in the lower side portion of the flat plate is not One side of the flat plate and the other side of the flat plate move rearward, and one side and the other side of the flat plate bend diagonally backward. A state is reached (see, for example, FIG. 8). In this state, the bottom portion of the ridge is formed by the central portion (lower side portion) of the flat plate, and the right and left lateral ridge wall portions are formed by the bent one side and the other lateral side portion of the flat plate.

  Therefore, according to the present invention, it is possible to perform leveling work and upsetting work with one leveling member for a rotary tiller. That is, it is not necessary to prepare two types of leveling members according to each work as in the prior art, and it is not necessary to replace them, which is advantageous in terms of cost and improves workability.

[Configuration of the second invention]
In the invention according to claim 2 of the present invention,
An intermediate member is provided at a central portion in the lateral direction of the lower end portion of the flat plate, and one end of each of the two support plates is pivotally connected to the intermediate member so as to change its posture.

[Action and effect]
According to the present invention, the support plate can be freely rotated around the pivot shaft of the middle member. As a result, the posture of the support plate can be easily changed, and the workability is further improved.

[Configuration of the third invention]
In the invention according to claim 3 of the present invention,
The support plate is provided with a leveling portion.

[Action and effect]
According to the present invention, since the cultivated land is leveled by the leveling portion of the metal support plate, the surface of the cultivated land when leveling work is performed as compared with the case where the cultivated land is leveled by a flexible plate. The shape is more likely to be more uniform.

Overall side view of walking type work machine Overall plan view of walking type work machine Vertical side view of rotary tiller and leveling member (leveling work or maintenance, etc.) Rear view of rotary tiller and leveling member (leveling work) Main part enlarged view (a) and vertical side view (b) of flat plate, middle member, and support plate Perspective view of rotary tiller and leveling member (leveling work) Longitudinal side view of rotary tiller and leveling member (raising work) Rear view of rotary tillage device and leveling member (raising work)

  As shown in FIGS. 1 and 2, axles 2 are provided at the lower right and left sides of the mission case 1, and traveling wheels 3 are connected to the right and left axles 2. The engine 5 is supported by the support frame 4 connected to the front part, and a walking work machine is configured. A transmission case 6 extends obliquely backward and downward from the upper part of the transmission case 1, and a steering handle 7 extends obliquely rearward and upward from the transmission case 6, and the transmission case 6 is provided with a rotary tiller 8. .

Next, the rotary tiller 8 will be described.
As shown in FIGS. 1 and 2, a drive shaft 9 extends from the lower part of the transmission case 6 to the right and left sides, and a plurality of tilling claws 10 are fixed to the right and left drive shafts 9. A rotary tilling device 8 is configured by including a cover 11 covering the upper portion of 10, a resistance rod 12, and the like. The right and left drive shafts 9 and the tilling claws 10 are normally rotationally driven in the forward rotation direction (the direction of arrow A1 in FIG. 3), and are also rotationally driven in the reverse rotation direction (the direction of arrow A2 in FIG. 3). Is possible.

Next, the cover 11 will be described.
As shown in FIGS. 3 and 4, the cover 11 is configured by connecting a fan-shaped lateral wall portion 11 b to the right and left sides of the semicylindrical ceiling portion 11 a, and the upper, right and left sides of the transmission case 6. The cover 11 (ceiling part 11 a) is connected to the bracket 6 a of the transmission case 6.

Next, the resistance rod 12 will be described.
As shown in FIGS. 3 and 4, a bracket 13 fixed to the transmission case 6 extends rearward, a narrow square pipe-shaped bracket 14 is fixed to the bracket 13, and the bracket 14 is attached to the cover 11 (ceiling). It protrudes upward from the opening of the part 11a). An opening (not shown) on the right side of the bracket 14 is provided with a lock bolt 16 for fixing the resistance rod 12 to the bracket 14. As shown by the line, a first hook portion 14a is provided that can hold the flat plate 18 in a raised state by hooking the middle member 21 of the flat plate 18 during maintenance of the tilling claw 10 or the like.

As shown in FIGS. 3 and 4, the resistance bar 12 is formed in an elongated bar shape, and its lower part extends in a state bent to the rear side.
A flat plate-shaped grounding portion 12a is fixed to the lower side of the lower portion of the resistance rod 12, and a middle member 21 of the flat plate 18 is hung on the lower end portion of the resistance rod 12 during the uprighting operation. A second hook portion 12c (corresponding to a fixing portion provided in the rotary tiller 8 so as to be positioned below the rear end portion of the cover 11) for stopping is provided.

  A plurality of fixing holes 12b are opened in the upper portion of the resistance rod 12 along the longitudinal direction thereof. The state shown in FIGS. 3 and 4 is a state in which the resistance rod 12 is inserted into the bracket 14 and the lock bolt 16 is inserted into one of the fixing holes 12 b of the resistance rod 12, and the resistance rod 12 is attached to the bracket 14. It is in a fixed state. In this state, the resistance rod 12 is positioned directly behind the transmission case 6, and the grounding portion 12a of the resistance rod 12 is positioned below the central portion in the left-right direction of the rear end portion of the cover 11 (ceiling portion 11a). Yes.

  In the state shown in FIGS. 3 and 4, the right and left drive shafts 9 and the tilling claws 10 are moved forward in the normal rotation direction (the direction of the arrow A1 in FIG. 3), thereby cultivating the field (plowing). ) Is performed. When the grounding portion 12a of the resistance bar 12 contacts the field, the height of the rotary tiller 8 relative to the field is determined, and the tilling depth of the rotary tiller 8 is determined.

  In the present embodiment, the tilling depth of the rotary tiller 8 can be changed as necessary. For example, if it is desired to set the tilling depth of the rotary tiller 8 deeper, after the lock bolt 16 is turned and removed, the resistance rod 12 is moved upward, and the lock bolt 16 is moved below the resistance rod 12. The resistance rod 12 may be fixed by screwing again into another fixing hole 12b located at the position. Thereby, since the height of the resistance rod 12 (grounding part 12a) with respect to the rotary tiller 8 is changed to a higher position, the tillage depth of the rotary tiller 8 is also set deeper. On the other hand, if it is desired to set the tillage depth of the rotary tiller 8 to be shallower, the resistance bolt 12 is moved downward after the lock bolt 16 is turned and removed, and the lock bolt 16 is moved above the resistance rod 12. The resistance rod 12 may be fixed by screwing again into another fixing hole 12b located at the position.

Next, the leveling member 17 will be described.
As shown in FIGS. 2, 3, and 4, the leveling member 17 includes a horizontally long (rectangular) flat plate 18 made of a flexible rubber plate, a metal intermediate member 21, a metal Two support plates 25 made of a long plate are used. In addition, as a material of the middle member 21 and the support plate 25, you may employ | adopt the thing of different materials, such as a hard resin board (a transparent board, a colored board, etc.), for example.

  The upper side portion 18a of the flat plate 18 (the upper end portion of the flat plate 18) is set to have substantially the same length (width) as the rear end portion 11c of the cover 11 (ceiling portion 11a), and the rear side of the cover 11 (ceiling portion 11a). An upper side portion 18a of the flat plate 18 is placed along the upper surface (rear surface) of the end portion 11c, and a fixing member 19 (a metal elongated shape) having substantially the same length (width) as the upper side portion 18a of the flat plate 18 is placed. Flat plate). At a plurality of locations of the fixing member 19, the bolt 20 is tightened through the rear end portion 11 c of the cover 11 (ceiling portion 11 a), the upper side portion 18 a of the flat plate 18, and the fixing member 19, and is fixed by the fixing member 19 and the bolt 20. The upper side portion 18a of the flat plate 18 is connected to the rear end portion 11c of the cover 11 (ceiling portion 11a) along the lateral direction. In addition, in this specification, let the surface of the flat plate 18 be the side which faces the back of a walk type work machine, and let a back surface be the side which faces the rotary tiller 8.

As shown in FIGS. 3 and 5, the upper end portion of the middle member 21 is fixed to the lateral center portion of the lower end portion on the surface side of the flat plate 18 by two bolts 23 having a washer 23 a and a nut 24. .
As shown in FIGS. 4 and 5, two support pins 22 and two hooking pieces 21 a are provided between the two support pins 22 at the lower portion of the middle member 21. A serrated leveling portion 21b is provided at the lower end portion. In addition, a through hole 21c (corresponding to a portion between the support plates 25 in the lower side of the flat plate 18) is provided in the center of the leveling portion 21b in the horizontal direction, as shown in FIGS. The through hole 21c of the intermediate member 21 is configured to be detachably hooked on the second hook portion 12c of the resistance rod 12.

As shown in FIG. 5, the support plate 25 includes a long hole 25 a that is long in the long side direction of the support plate 25, a hooked portion 25 b that comes into contact with the hooking piece 21 a of the middle member 21 during leveling work, and the middle member 21. An introduction groove 25d that can be hooked by introducing the bolt 23 and a saw-tooth leveling portion 25e are provided.
The long hole 25a is provided at the end of the support plate 25, and is configured so that the shaft portion of the support pin 22 can be inserted.
The introduction groove 25d is a groove that is cut out in an arc shape inward from the long side portion of the support plate 25, and its end portion is formed in a long hole shape that is long in the long side direction.
The leveling portion 25e is provided along the other long side different from the long side where the introduction groove 25d is provided.

  The short diameter of the long hole 25 a of the support plate 25 is configured to be larger than the shaft diameter of the support pin 22 and smaller than the head diameter of the support pin 22. Therefore, by inserting the shaft portion of the support pin 22 into the long hole 25a of the support plate 25 and fixing it to the middle member 21, the support plate 25 is pivotally connected to the middle member 21 so as to be capable of circular arc movement with the support pin 22 as a fulcrum. Is done. As a result, the two support plates 25 are mounted side by side in a lateral orientation along the lower side of the flat plate 18 as shown in FIGS. 4 and 6, and as shown in FIG. The configuration is such that the posture can be freely changed to a state in which it is attached in a vertically oriented posture to a central portion of 18 horizontal directions.

Next, leveling work will be described.
As shown in FIGS. 4, 5, and 6, when performing the leveling work, the two support plates 25 in the vertical orientation are rotated downward about the support pins 22, thereby The bolts 23 are removed from the introduction grooves 25d, and are arranged side by side in a horizontal posture along the lower side portion 18b of the flat plate 18 so that the hooked portions 25b, 25b of the support plates 25, 25 are hooked on the intermediate member 21. The two support plates 25 and 25 are configured to be fixed by their own weights by being brought into contact with the lower surface portions of the stopper pieces 21a and 21a, respectively. At this time, as shown in FIG. 4, the leveling portion 21b of the middle member 21 and the leveling portions 25e of the two support plates 25, 25 are connected in a straight line. In the leveling operation, the through hole 21c of the intermediate member 21 is removed without being hooked on the second hook portion 12c of the resistance rod 12.

  In this state, as shown in FIGS. 4, 5, and 6, the lower side portion 18b of the flat plate 18 hangs down from the rear end portion 11c of the cover 11 (ceiling portion 11a) while being supported by the two support plates 25. Appears.

  As shown in FIG. 6, the rotary tiller 8 rotates the right and left drive shafts 9 and tilling claws 10 in the normal rotation direction (the direction of the arrow A <b> 1 in FIG. 3) as the airframe advances. The cultivated soil is received by the back surface of the flat plate 18 so that the entire flat plate 18 moves rearward (upward). The middle member 21 provided on the lower side portion 18b of the flat plate 18 and the two members A flat surface is formed by the support plate 25.

Next, the setting work will be described.
As shown in FIGS. 7 and 8, when performing the uprighting work, the two support plates 25 in the horizontal posture are rotated upward about the support pins 22, so that the flat plate 18 is centered in the horizontal direction. As the vertical orientation, the bolt 23 of the intermediate member 21 is introduced into the introduction groove 25d of the support plate 25, and the washer 23a of the bolt 23 is hooked on the long hole portion of the introduction groove 25d, thereby supporting the two support plates 25. Is fixed by its own weight. In the uprighting operation, the second hook portion 12c of the resistance rod 12 is inserted into the through hole 21c of the middle member 21 and hooked, so that the middle member 21 and the resistance rod are connected.

  In this state, as shown in FIGS. 7 and 8, as the aircraft advances, the right and left drive shafts 9 and the tilling claws 10 are rotated in the forward direction (the direction of arrow A <b> 1 in FIG. 7). When the cultivated soil is received by the flat plate 18, the central portion (lower side portion 18 b) of the flat plate 18 does not move backward (the middle member 21 is connected to the resistance rod 12. Therefore, one side and the other side of the flat plate 18 move backward.

  Thus, as shown in FIG. 4, the left and right ends of the middle member 21 are the starting points, and the vicinity of the alternate long and short dash line B1 in the flat plate 18 is a folding line, as shown in FIG. It will be in the state where a part bends back diagonally. In this state, the bottom portion C1 of the flange C is formed by the central portion (lower side portion 18b) of the flat plate 18 and the middle member 21, and the right and left lateral flanges are formed by the bent one and other lateral sides of the flat plate 18. A C wall portion C2 is formed.

  In this case, since the middle member 21 is connected to the resistance rod 12, the bottom C1 of the heel C is stably formed, and the right and left lateral side walls C2 of the heel C and the heel C A portion between the bottom C1 is also clearly formed in a corner shape. When one and the other lateral side portions of the flat plate 18 are bent obliquely rearward, the wall portions C2 of the right and left lateral ridges C are stably formed.

  As described above, according to the leveling member for the rotary tilling device of the present embodiment, the leveling member 17 for one rotary tilling device can perform the leveling work and the standing work. That is, it is not necessary to prepare two types of leveling members according to each work as in the prior art, and it is not necessary to replace them, which is advantageous in terms of cost and improves workability.

  Further, by rotating the support plate 25 freely around the support pin 22 (pivot shaft) of the intermediate member 21, the posture of the support plate 25 can be easily changed, and the workability is further improved. improves.

  In addition, since the cultivated land is leveled by the leveling portion 25e of the metal support plate 25, the surface of the cultivated land when leveling work is performed as compared with the case where the cultivated land is leveled by the flat plate 18 having flexibility. The shape is more likely to be more uniform.

[Another embodiment]
[1] The support plate 25 in the above-described embodiment may be configured to be detachable with respect to the flat plate 18 so that the posture can be changed between the horizontal posture and the vertical posture. In the present embodiment, the middle member 21 may be eliminated.
[2] The intermediate member 21 and the support plate 25 in the above-described embodiment may be configured such that the leveling portions 21b and 25e are not provided. Therefore, when performing leveling work in the present embodiment, a leveling plane is formed by the lower side portion 18b of the flat plate 18 that contacts the field. At this time, the two support plates 25 along the lower side portion 18b of the flat plate 18 play a role like a weight and the flapping of the lower side portion 18b of the flat plate 18 is suppressed, so that the flat surface is stably formed.
[3] The present invention eliminates not only the walking type working machine having the traveling wheel 2 and the rotary tiller separately but also the traveling wheel 3 in FIGS. 1 and 2, and the right and left axles. 2 can also be applied to a walking type working machine in which a rotary claw device 10 is configured by connecting a tilling claw 10 to a rotary tiller 8 mounted on a riding tractor.

  As described above, the present invention is useful for a leveling member used in a rotary tiller device mounted on a walking-type work machine or a riding-type tractor, and is suitable for reducing costs and improving workability. Yes.

8 Rotary tiller 11 Cover 12c 2nd hook part (fixing part)
17 Leveling member 18 Flat plate 18b Lower side portion 21 Middle member 21c Through hole (portion between support plates)
25 Support plate 25e Leveling part

Claims (3)

A horizontally long flat plate having flexibility and having an upper end connected to a rear end of a cover of the rotary tiller;
It is possible to change the posture to a state in which it is mounted side by side in a horizontal posture along the lower side of the flat plate, and a state in which it is attached in a vertical posture to the horizontal central portion of the flat plate. With two support plates,
A leveling member for a rotary cultivating device, wherein a portion between the support plates in a lower side portion of the flat plate is detachably attached to a fixed portion provided in the rotary cultivating device so as to be positioned below a rear end portion of the cover.   The intermediate member is provided in the horizontal direction center part of the lower end part of the said flat plate, Each one end of each of these two support plates is pivotally connected to the said intermediate member so that attitude change is possible. Leveling member for rotary tiller.   The leveling member for a rotary tilling device according to claim 1 or 2, wherein the leveling portion is provided on the support plate.

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