JP5250004B2 - Rotary tillage device - Google Patents

Description

  The present invention provides a flat plate having flexibility and having an upper end connected to a rear end of a cover of a rotary tiller, and a horizontal central portion of a lower side of the flat plate. A restricting member capable of restricting the movement of the central portion in the direction to the rear of the cover, a state in which the central portion is arranged in the horizontal direction in a horizontal posture along the lower side portion of the flat plate, and the vertical central portion in the horizontal direction of the flat plate The present invention relates to a rotary tiller that includes two support plates that are attached to the flat plate so that the posture can be changed in a state of being arranged side by side in an orientation posture.

  The rotary tilling device releases the regulation by the regulating member, and performs leveling work to level the cultivated soil flat at the lower side of the leveling plate, and movement of the horizontal center of the lower side of the flat plate by the regulating member. It is possible to carry out the uprighting work to form the ridges on both the left and right sides of the rotary tiller by restricting and bending the left and right lateral sides of the leveling plate diagonally backward (see Patent Document 1).

JP 2009-225731 A

In the above-mentioned conventional rotary tiller, when carrying out the uprighting work, the horizontal center part of the lower side of the flat plate is hooked to the grounding part (regulating member) of the resistance bar, so that a separate pin such as a beta pin is used. It is necessary to attach the member. Therefore, not only is it troublesome to attach such a retaining member, but the retaining member may be lost, leaving room for improvement.
The present invention has been made in view of such problems, and a rotary tiller that does not require the use of a separate member when hooking the lateral central portion of the lower side of the flat plate on the regulating member during the uprighting work. The purpose is to provide.

  The first characteristic configuration of the rotary tiller according to the present invention is a flat plate having flexibility and having an upper end connected to the rear end of the cover of the rotary tiller, and a lateral side of the lower side of the flat plate. A regulating member that is capable of regulating the lateral central portion in contact with the central portion in the lateral direction and restricting the lateral central portion from moving to the rear of the cover, a state in which the lateral lateral orientation is provided along the lower side portion of the flat plate, and the Two support plates attached to the flat plate in such a manner that the posture can be freely changed in a state of being arranged side by side in a vertical posture at the horizontal center of the flat plate, and when the support plate is set in a vertical posture, the regulation Engaging with the member restricts the movement of the flat central portion of the flat plate to the rear of the cover, and when the support plate is set to the horizontal posture, the engagement with the restricting member is released and the flat plate has a horizontal central portion. Engagement part that allows movement of the part toward the back of the cover In that it comprises a support plate.

[Action and effect]
As in this configuration, if the support plate has an engaging portion that can be releasably engaged with the regulating member, the support plate is set to a vertical orientation when performing the uprighting work. By engaging the joint portion and the regulating member, the lateral central portion of the lower side of the flat plate can be easily hooked to the regulating member.
Therefore, it is not necessary to attach a retaining member as a separate member when performing the uprighting work, so that it does not take time and worry about losing the retaining member.
In addition, since the engagement state can be easily released by setting the two support plates in the horizontal posture, the switching work from the standing work to the leveling work is also easy.

  The second characteristic configuration is that the restricting member is provided at a lower portion of a resistance bar disposed on the front side of the flat plate.

[Action and effect]
As in this configuration, by providing the restricting member at the lower portion of the resistance rod, the movement of the flat central portion in the lateral direction to the rear of the cover can be more reliably restricted. Moreover, the structure can be simplified by using the resistance rod, which is an existing member, for supporting the regulating member.

  In the third feature configuration, when the uprighting operation is performed, the restriction member is positioned between the two support plates, and when the two support plates are set in the vertical posture, the engaging portion of the one support plate on the side is It is in the point which engages with the horizontal one part of the said limitation member, and the engaging part of the said other horizontal support plate engages with the horizontal other part of the said limitation member.

[Action and effect]
According to this configuration, each of the lateral one portion and the lateral other portion of the regulating member is engaged with the respective engaging portions of the two support plates, so that a stable latching state with a good balance can be maintained.

It is the whole walk type work machine side view. It is a whole top view of a walk type work machine. It is a vertical side view of a rotary tiller. It is a rear view of the rotary tiller at the time of leveling work. It is a principal part enlarged view of a flat plate, a middle member, and a support plate. It is the rear view which expanded the principal part of the support plate at the time of a standing work. It is a top view of the control member at the time of a standing work. It is a perspective view of the rotary tillage device at the time of leveling work. It is a vertical side view of the rotary tillage device at the time of the uprighting work. It is a rear view of the rotary plowing device at the time of standing work. It is a rear view of the rotary plowing device at the time of standing work.

Embodiment
Based on FIGS. 1-11, embodiment at the time of applying the rotary tilling apparatus 8 which concerns on this invention to a walk type working machine is described.
As shown in FIGS. 1 and 2, the walking work machine is provided with axles 2 on the right and left sides of the lower part of the mission case 1, and traveling wheels 3 are connected to the right and left axles 2. The engine 5 is supported by a support frame 4 connected to the front portion of the mission case 1.

  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. .

  As shown in FIG. 1 and FIG. 2, the rotary tiller 8 has a drive shaft 9 extending from the lower part of the transmission case 6 to the right and left sides, and a plurality of forward / reverse pawls 10 on the right and left drive shafts 9. The cover 11 is fixed and covers the upper side of the forward / reverse claw 10, the resistance bar 12, and the leveling member 17. The right and left drive shafts 9 and forward / reverse claws 10 are normally driven to rotate in the forward direction (the direction of arrow A1 in FIG. 3), and also rotate in the reverse direction (the direction of arrow A2 in FIG. 3). It is possible to drive.

  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 ceiling 11a of the cover 11 is connected to a bracket (not shown) of the transmission case 6.

  As shown in FIGS. 3 and 4, the bracket 13 fixed to the transmission case 6 extends rearward, the narrow square pipe-shaped bracket 14 is fixed to the bracket 13, and the bracket 14 is attached to the ceiling portion 11a. It protrudes upward from the opening. 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 state where the flat plate 18 is lifted by hooking the middle member 21 of the flat plate 18 when the forward / reverse claw 10 is maintained.

  As shown in FIGS. 3 and 4, the resistance rod 12 is formed in an elongated rod shape, and a plate-like regulating member 15 is provided in the lower portion thereof. As shown in FIG. 7, the regulating member 15 has a tapered surface that tapers toward the resistance rod 12 in a plan view. Engaging recesses 15a are formed on the left and right side surfaces extending from the tapered surface to the rear of the vehicle body so as to be bilaterally symmetric in plan view with the lateral center of the regulating member 15 as the center line C. The restricting member 15 is formed with a through hole 15b for attaching a moving wheel.

  A plurality of fixing holes 12a are opened in the upper portion of the resistance rod 12 along the longitudinal direction thereof. The state shown in FIG. 3 and FIG. 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 a of the resistance rod 12. It is in a fixed state. In this state, the resistance rod 12 is positioned directly behind the transmission case 6, and the regulating member 15 is positioned below the central portion in the left-right direction at the rear end portion of the cover 11.

  In the state shown in FIGS. 3 and 4, the right and left drive shafts 9 and forward / reverse claws 10 are moved forward in the forward rotation direction (the direction of arrow A1 in FIG. 3) to advance the field (plowing). Ki) is performed. When the lower end of the resistance bar 12 contacts the field, the height of the rotary tiller 8 with respect 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 12a located at the position. Thereby, since the height of the resistance rod 12 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 12a located at the position.

  As shown in FIGS. 2, 3, and 4, the leveling member 17 includes a horizontally long (rectangular) flat plate 18 constituted by a flexible rubber plate, a metal intermediate member 21, a metal It is made up of two long and plate-like support plates 25, 25. The material of the intermediate member 21 and the support plate 25 is not limited to metal, and for example, a hard resin plate (transparent plate, colored plate, etc.) may be employed.

  The upper side portion 18a of the flat plate 18 is set to have substantially the same length as the rear end portion 11c of the ceiling portion 11a, and the upper side portion 18a of the flat plate 18 is placed along the upper surface of the rear end portion 11c of the ceiling portion 11a. A fixing member 19 (a metal long thin plate) having substantially the same length as the upper side portion 18a of the flat plate 18 is placed thereon.

  By fastening each of the four bolts 20 penetrating over the rear end portion 11c of the ceiling portion 11a, the upper side portion 18a of the flat plate 18 and the fixing member 19 with the nut 22 from the back side of the flat plate 18, The upper side portion 18a of the flat plate 18 is connected to the rear end portion 11c of the 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 tillage apparatus 8.

  As shown in FIG. 4, the middle member 21 is provided at the laterally central portion of the lower side portion on the surface side of the flat plate 18. As shown in FIG. 4 and FIG. 5A, the middle member 21 is formed by passing the two bolts 23 penetrating through the central portion and the lateral central portion of the lower side portion of the flat plate 18 into the flat plate 18. It is fixed by fastening with a nut (not shown) from the back side.

  As shown in FIGS. 4 and 5A, the first headed pin 27 and the second headed pin 28 are provided on the left and right sides of the middle member 21 in the vertical direction of the paper surface of FIGS. 4 and 5A. In the lower end portion of the middle member 21, a sawtooth leveling portion 21a is provided.

  As shown in FIG. 5 (b), a first pin through hole 27a penetrating in the axial radial direction is provided on the side surface of the tip portion of the first headed pin 27, and the tip of the second headed pin 28 is Similarly, the side surface is provided with a second pin through hole 28a penetrating in the axial direction.

  As shown in FIGS. 4 and 5A, a square through hole 21b is provided in the center of the leveling portion 21a in the horizontal direction. As shown in FIG. 9, the through hole 21b can be detachably hooked to the first hook portion 14a of the bracket 14 as shown in FIG. .

  As shown in FIGS. 4 and 5A, 5B, the support plate 25 has a long hole 25a through which the first headed pin 27 is inserted and an arc long hole 25d through which the second headed pin 28 is inserted. And receiving part 25b which becomes a reaction force receiving when it receives the earth pressure at the time of leveling work, and contacts middle member 21, serrated leveling part 25f, and engaging part 25h are provided.

  The arc long hole 25d is a long hole opened in an arc shape around the long hole 25a around the virtual point P1 corresponding to the position of the first headed pin 27 in FIG. Is attached to the middle member 21 so as to be positioned above the long hole 25a. A long hole portion 25e that is long in the long side direction of the support plate 25 is formed at one end of the circular arc long hole 25d, and the long hole portion 25e has a function of holding the support plate 25 in a vertical posture.

  When the support plate 25 is set in the vertical orientation, the engagement portion 25 h engages with the engaged recess 15 a of the regulating member 15 to cover the cover 11 of the middle member 21 (lateral center portion) of the lower side portion 18 b of the flat plate 18. When the support plate 25 is set in the horizontal posture, the engagement with the restriction member 15 is released and the movement of the cover 11 of the lower member 18b of the flat plate 18 to the rear of the cover 11 is allowed. Configured to do.

  The engaging portion 25h is formed at the lower inner portion of the support plate 25 in the vertical orientation of the support plate 25 shown in FIG. A curved portion 25A that is curved so as to be located on the outer side toward the lower end side is formed at the lower inner portion of the support plate 25, and the upper portion of the curved portion 25A functions as the engaging portion 25h. In addition, an inclined portion that is linearly inclined is formed at a lower inner portion of the support plate 25 in FIG. 6 so that the lower end side is located on the outer side, and the upper portion of the inclined portion functions as the engaging portion 25h. Alternatively, it may be configured such that a linear portion that is linear in the vertical direction is formed in the lower inner portion of the support plate 25 in FIG. 6, and this linear portion functions as the engaging portion 25h.

  The two support plates 25 are attached to the middle member 21 as described below. First, the end portions of the two support plates 25 are respectively disposed on the left and right sides of the middle member 21, and the first headed pin 27 and the second head are respectively inserted into the long holes 25 a and the circular arc long holes 25 d of the support plates 25. The attached pin 28 is inserted.

  A first flat washer 29 having an outer diameter larger than the width of the long hole 25a is attached to the tip of the first headed pin 27 protruding from the long hole 25a, and the first pin through hole of the first headed pin 27 is attached. In addition, one end of the first beta pin 31 is inserted into 27a, and a second flat surface having an outer diameter larger than the width of the arc long hole 25d is similarly applied to the tip of the second headed pin 28 protruding from the arc long hole 25d. The washer 30 is attached, and one end of the second beta pin 32 is inserted into the second pin through hole 28a of the pin 28 with the second head. At this time, the first plain washer 29 is located between the first beta pin 31 and the support plate 25, and the second plain washer 30 is located between the second beta pin 32 and the support plate 25.

  The first headed pin 27 is prevented from coming off from the long hole 25a by a first retaining part composed of the first beta pin 31 and the first flat washer 29. About the second headed pin 28 Similarly, the second beta pin 32 and the second plain washer 30 are prevented from coming off from the arc long hole 25d by the second retaining part.

  With the above configuration, the right and left support plates 25, 25 are supported by the middle member 21 in a state in which the first and second headed pins 27, 28 are prevented from coming off in the axial direction. The second headed pin 28 is guided along the arc long hole 25d by rotating the support plate 25 along the arc long hole 25d with the axis of 27 as a rotation fulcrum. As a result, the right and left support plates 25, 25 are arranged side by side in a lateral orientation along the lower side portion 18b of the flat plate 18 as shown in FIGS. 4 and 8, or in FIGS. As shown, the posture can be smoothly changed to a vertically oriented state at the laterally central portion of the flat plate 18.

Next, leveling work will be described.
As shown in FIGS. 4, 5, and 8, when performing the leveling work, the right and left support plates 25, 25 in the vertical orientation are set to the arc length with the first headed pin 27 as the rotation fulcrum. It is rotated downward along the hole 25d. As a result, the right and left support plates 25, 25 are arranged side by side in a lateral orientation along the lower side portion 18 b of the flat plate 18, and the ends of the circular arc long holes 25 d of the respective support plates 25 are connected to the middle member 21. It abuts on the pin 28 with the second head. At this time, as shown in FIG. 4, the leveling portion 21a of the intermediate member 21 and the leveling portions 25f of the right and left support plates 25, 25 are connected in a straight line.

  In the leveling operation, the regulating member 15 is removed from the through hole 21b of the middle member 21. As a result, as shown in FIG. 8, the lower side portion 18 b of the flat plate 18 is suspended from the rear end portion 11 c of the cover 11 while being supported by the two support plates 25.

  As shown in FIG. 8, the rotary tiller 8 rotates the right and left drive shafts 9 and forward / reverse claws 10 in the forward direction (in the direction of arrow A1 in FIG. 3) as the machine moves forward. The cultivated soil is received by the back surface of the flat plate 18, the entire flat plate 18 moves rearward, the leveling portion 21 a of the intermediate member 21 provided on the lower side portion 18 b of the flat plate 18, and two supports A leveling surface is formed by the leveling portion 25 f of the plate 25.

Next, the setting work will be described.
As shown in FIGS. 6, 9, and 10, when performing the uprighting work, the two support plates 25 in the horizontal posture are arranged along the circular arc hole 25 d with the first headed pin 27 as the pivot fulcrum. By turning the plate 18 upward, the vertical orientation is set at the lateral center of the flat plate 18, and then the support plate 25 is moved slightly downward, so that the second headed pin 28 of the middle member 21 has an arc length. The long hole 25e of the hole 25d is hooked. As a result, the two support plates 25 are held in a state of being juxtaposed in the horizontal direction in the vertical orientation at the central portion in the horizontal direction of the flat plate 18. As shown in FIG. 10, in this embodiment, both the inclined portion 25g connected to the leveling portion 25f of the support plate 25 in the vertical orientation and the end portion 21c of the leveling portion 21a of the intermediate member 21 are provided. It is set along the direction of the virtual extension line B1.

  As shown in FIGS. 6 and 7, in the uprighting work, when the regulating member 15 is inserted into the through hole 21 b of the middle member 21, the regulating member 15 is positioned between the two support plates 25. Then, after rotating the two support plates 25 as described above, the support plate 25 is moved slightly downward so that the second headed pin 28 of the intermediate member 21 is inserted into the long hole portion 25e of the circular arc long hole 25d. When engaged, the engaging portion 25h of the right support plate 25 enters and engages with the engaged recess 15a (lateral one portion) on the right side of the regulating member 15, and the engaging portion of the left support plate 25 is engaged. 25h enters and engages the engaged recess 15a (lateral other portion) on the left side of the restriction member 15, and the middle member 21 of the flat plate 18 is hooked on the restriction member 15.

  As a result, the rearward movement of the middle member 21 (lateral center portion) of the lower side portion 18b of the flat plate 18 is restricted, so that the forward / reverse claw is moved forward as the aircraft advances as shown in FIGS. When the soil cultivated by the rotational drive in the forward rotation direction 10 (direction of arrow A1 in FIG. 9) is received by the flat plate 18, the middle member 21 of the lower side portion 18b of the flat plate 18 does not move to the rear of the cover 11. The left and right lateral sides of the flat plate 18 move backward.

  As a result, as shown in FIG. 11, the left and right lateral sides of the flat plate 18 are bent obliquely rearward with the virtual extension line B1 (see FIGS. 4 and 10) in the flat plate 18 as a fold line.

  Then, as shown in FIG. 11, the bottom C1 of the flange C is formed by the left and right central portions of the lower side portion 18b of the flat plate 18 and the middle member 21, and the right and left lateral sides are formed by the bent left and right lateral sides of the flat plate 18. A wall portion C2 of the side wall C is formed.

  Further, in the present embodiment, the support plate 25 is moved slightly upward to remove the second headed pin 28 of the middle member 21 from the long hole portion 25e of the arc long hole 25d and the first head of the middle member 21. By disposing the attached pin 27 on the other end side of the long hole 25a, the engagement between the engaging portion 25h of the support plate 25 and the engaged recess 15a of the regulating member 15 is released. .

  In addition, about the aspect which cancels | releases engagement with the engaging part 25h of the support plate 25, and the to-be-engaged recessed part 15a of the control member 15, it is not limited to the said embodiment, The support plate 25 is made a little upwards. After moving and removing the second headed pin 28 of the middle member 21 from the long hole portion 25e of the arc long hole 25d, the support plate 25 is moved to the arc long hole 25d with the first headed pin 27 as the rotation fulcrum. Further, the engagement between the engaging portion 25h of the support plate 25 and the engaged recess 15a of the restricting member 15 may be released in the middle of the downward rotation along the direction.

  As described above, the present invention eliminates not only the walking type work machine having the traveling wheel and the rotary tiller separately but also the traveling wheel, and the right and left axles are provided with forward / reverse claws. It is useful for a ground leveling member used in a walking type working machine that is coupled to form a rotary tiller and a rotary tiller that is mounted on a riding tractor.

11 Cover 12 Resistance rod 15 Restriction member 18 Flat plate 18b Lower side part 21 Middle member (lateral direction center part)
25 Support plate 25h Engagement part

Claims (3)

A flat plate having flexibility and having an upper end connected to the rear end of the cover of the rotary tiller;
A restricting member capable of restraining the lateral central portion of the lower side portion of the flat plate from being hooked and restricting the lateral central portion from moving behind the cover;
The plate is attached to the plate so that the posture can be freely changed to a state in which the plate is placed side by side in a horizontal posture along the lower side of the plate and a state in which the plate is arranged in the horizontal direction in a vertical posture at the center in the horizontal direction of the plate. With two support plates,
When the support plate is set in the vertical orientation, the control member engages with the restriction member to restrict the movement of the center portion of the flat plate in the rearward direction of the cover, and when the support plate is set in the horizontal orientation, the restriction member and The rotary tilling device is provided with an engaging portion that releases the engagement of the flat plate and allows the central portion of the flat plate in the lateral direction to move rearward of the cover.   The rotary tiller according to claim 1, wherein the restricting member is provided at a lower portion of a resistance bar disposed on the front side of the flat plate.   In the uprighting operation, when the restriction member is positioned between the two support plates and the two support plates are set in the vertical orientation, the engagement portion of the one side support plate is set to the side of the restriction member. The rotary tiller according to claim 1 or 2, wherein the engaging portion of the other support plate is engaged with the other side portion of the regulating member.

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