JP6154500B2 - Plowing weeder - Google Patents

Description

  The present invention relates to a middle tillage weeding machine that performs middle tillage and weeding between crops and between plants.

  Conventionally, as this type of mid-weed weeder, a main frame extending in the horizontal direction and supported by a hole inside, a second frame telescopically provided at an axial end of the main frame, and It is known that the vehicle has a third frame and is capable of traveling on the road by shortening the width of the vehicle when traveling on the road while attached to the traveling vehicle (see Patent Document 1).

  In each of the main frame, the second frame, and the third frame of the conventional tiller weeder, a middle tilling unit (rotary unit in the literature) for performing the tilling work is attached. A screw seat is fixed in the main frame and the second frame, and a screw rod screwed into the screw seat is rotatably supported on an axial end portion of the third frame. A fixed handle is attached to the. When this fixed handle is rotated, the screw rod rotates and moves a plurality of frames via the screw seat, and the second and third frames expand and contract with respect to the main frame, and are attached to each frame. The position of the cultivated unit can be adjusted.

  In addition to the manual mechanism described above as means for moving the position of the middle tillage unit in the body width direction, there is known one that moves the middle tilling unit by expansion and contraction of a hydraulic cylinder (see Patent Document 2).

No. 06-8645 Japanese Utility Model Publication No. 57-144403

  In this conventional cultivating weeder, the plurality of frames are expanded and contracted by operating the fixed handle, but the expansion and contraction speeds of the plurality of frames by operating the fixed handle are relatively slow. For this reason, when driving | running | working on a road in the state which attached the medium plowing weeder to the traveling body, it takes time to reduce a some flame | frame. Further, if a twist occurs in the portion where the frames slide, the frictional force increases, and the force cannot be smoothly expanded and contracted, resulting in an excessive force.

  In addition, those using a hydraulic cylinder as a drive source for expanding and contracting a plurality of frames require a hydraulic circuit, a valve and the like, which complicates the structure and increases the manufacturing cost.

  The present invention has been made to solve such a problem, and provides a middle tillage weeder capable of quickly expanding and contracting a frame that supports the middle tillage unit movably while suppressing an increase in manufacturing cost. Objective.

  In order to solve such a problem, the present invention has a main frame that extends in the horizontal direction and is supported by a hole, and an opening that opens to one end of the main frame. A plowing weeder having a slide frame to which a plow unit that is inserted and performing a plowing operation is attached, and is rotatably provided on a side to be inserted into the hole of the slide frame and in contact with the upper inner surface of the hole A first roller that rolls and a main frame that is closer to the opening side of the hole than the first roller of the slide frame that is inserted into the hole of the main frame are rotatably provided to contact the lower surface of the slide frame and roll. The slide frame is movably supported by the main frame via the first roller and the second roller.

  The inner upper surface of the hole of the present invention is formed in a planar shape along the direction in which the main frame extends, and the lower surface of the slide frame is formed in a planar shape in the direction in which the slide frame extends. And

  Further, the first roller and the second roller of the present invention are rolling bearings.

  According to the middle tillage weeder according to the present invention, it is possible to provide a middle tillage weeder capable of rapidly expanding and contracting the frame that movably supports the middle tillage unit by suppressing the increase in production cost by having the above-described features. .

The middle tillage weeder concerning one embodiment of the present invention is shown, the figure (a) is a top view of the middle tillage weeder, the figure (b) is the rear view of the middle tillage weeder, the figure (c). Fig. 2 is a side view of a middle tillage weeder. It is a figure for demonstrating expansion and contraction of the slide frame of a middle plowing weeder, The figure (a) is a partial top view of the middle plowing weeder when a slide frame exists in the expansion | extension state, The figure (b) is a middle plowing weed It is a partial rear view of a machine. Sectional drawing of the part corresponded to the II-II arrow view of FIG.2 (b) for demonstrating the state which the lock mechanism locked the slide frame is shown. Sectional drawing of the part corresponded to the II-II arrow of FIG.2 (b) for demonstrating the state which the lock mechanism unlocked the slide frame is shown. It is a figure for demonstrating expansion and contraction of the slide frame which supports the middle tillage unit of a middle tillage weeder, The figure (a) is a partial top view of a middle tillage weeder when a slide frame is in a contracted state, b) is a partial rear view of the middle tillage weeder.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. The middle tillage weeder is attached to the rear part of the traveling body, and the ground tillage unit with multiple disk pairs is grounded on the field between the rows of crops, along the striations as the traveling body moves forward. Work in progress. In the present embodiment, an explanation will be given by taking as an example a middle tillage weeder including five middle tillage units.

  First, the middle tillage weeder 1 will be described with reference to FIG. 1A (plan view), FIG. 1B (rear view), and FIG. 1C (side view). As shown in FIGS. 1 (a), 1 (b), and 1 (c), the middle plowing weeder 1 has a rear part of the traveling machine body 90 at the front part of the main frame 3 that is supported by extending in the width direction. A connecting portion 5 including a mast 6 and a lower hitch pin 7 connected to a three-point link connecting mechanism provided on the vehicle is provided, and is attached to a rear portion of the traveling machine body 90 so as to be movable up and down.

  A pair of gauge support arms 9 projecting forward are provided on both sides of the main frame 3 in the longitudinal direction, and a gauge ring support rod 12 is attached to the tip of the gauge support arm 9 so that the height can be adjusted. A gauge ring 11 is rotatably attached to the lower end of the gauge ring support rod 12. The height adjustment of the gauge wheel support rod 12 is performed by fixing an adjustment hole 12a provided in the gauge wheel support rod 12 with a fixing pin 13 in accordance with a support hole provided in the gauge support arm 9, which will be described later. This is performed in order to adjust the tilling depth of the front row disk 30 and the rear row disk 40.

  At both ends in the longitudinal direction of the main frame 3, slide frames 15 that are movable with respect to the main frame 3 are provided. The structure of the main frame 3 and the slide frame 15 will be described later.

  The main frame 3 is provided with three middle tilling units 20 that have a predetermined interval in the longitudinal direction thereof and medium-cultivating soil between the streaks, and the middle tilling unit 20 is also provided at the outer end in the longitudinal direction of the slide frame 15. ing. Since these middle tillage units 20 have the same structure, only the middle tillage unit 20 disposed in the center of the machine body width direction will be described, and the other middle tillage units 20 will be denoted by the same reference numerals and explanations thereof. Is omitted.

  The tilling unit 20 is connected to the main frame 3 so that the front end side thereof is movable in the vertical direction and extends to the rear side in the traveling direction, and is rotatably supported on the front side and the rear side of the supporting frame 21. A pair of front row discs 30 and a pair of rear row discs 40 whose rear sides are inclined obliquely rearward and outward, a pair of chizels 50 disposed in the width direction between the front row discs 30 and the rear row discs 40, and a chisel 50 and a rear-row disc 40, and a soil removal mechanism 55 is provided.

  The support frame 21 is supported by a parallel link mechanism 22 provided between the front side of the support frame 21 and the main frame 3 so as to be movable in the vertical direction while remaining substantially horizontal. The pair of front row disks 30 are rotatably supported below the front side of the main frame 3 and are arranged in a C shape in plan view. The front row disk 30 causes the soil to be cultivated to flow along the front surface of the front row disk 30 to the rear side in the traveling direction and cultivate the crop.

  The rear row disk 40 is rotatably supported below the rear side of the support frame 21 and is arranged in a C shape in plan view. The rear row disc 40 cultivates the soil softened by the chisel 50 into a crop.

  The chisel 50 is disposed on the rear side in the traveling direction of the pair of front row disks 30 and expands the remaining tillage remaining without being cultivated outside the front row disk 30 in the inter-width direction. The earth removal mechanism 55 is disposed between the pair of rear row disks 40 and the pair of chiseles 50 and in the middle portion of the pair of front row disks 30 in the width direction of the pair of front row disks 30, and between the pair of front row disks 30. The remaining tillage that is not cultivated in the middle is eliminated to the outside in the width direction of the striations.

  A handle 23 is provided on the front and rear upper portions of the tillage unit 20 provided on the slide frame 15 (see FIG. 1C). These handles 23 are gripped when the slide frame 15 is moved, and move the slide frame 15 relative to the main frame 3 via the tillage unit 20.

  Next, the structures of the main frame 3 and the slide frame 15 that support the tillage unit 20 will be described with reference to FIGS. As shown in FIGS. 2 (a), 2 (b), and 3, the main frame 3 is composed of a square pipe formed in a quadrangular cross section, extends in a substantially horizontal direction, and has a square cross section inside. Part 3a is formed. The hole 3 a extends along the direction in which the main frame 3 extends and opens at both ends of the main frame 3. Since the hole 3a is formed to have a quadrangular cross section, the inner surface of the hole 3a is formed in a flat shape to facilitate the rolling of a first roller 17 (described later) provided on the slide frame 15. Hereinafter, the opening at the end of the hole 3a is referred to as an opening 3b.

  The slide frame 15 has a shape similar to that of the main frame 3 and is formed of a square pipe having a square cross section. The slide frame 15 extends in a substantially horizontal direction from the opening 3b on one end side of the main frame 3 to the inside of the hole 3a. It is inserted so that it can project freely.

  A pair of support plates 16 are provided so as to protrude in the extending direction of the slide frame 15 at the end in the longitudinal direction on the side where the slide frame 15 is inserted into the hole 3 a. A rotation shaft is attached between the support plates 16, and a first roller 17 is rotatably provided around the rotation shaft. The first roller 17 is a rolling bearing (bearing). The upper end of the first roller 17 protrudes above the upper surface 15 a of the slide frame 15, and rolls in contact with the upper inner surface 3 a 1 of the hole 3 a of the main frame 3. The amount of protrusion of the first roller 17 from the upper surface 15 a of the slide frame 15 is determined in consideration of the fact that the slide frame 15 can move in the hole 3 a of the main frame 3.

  A rectangular notch 3c in plan view is provided below the longitudinal end of the main frame 3. The cutout portion 3 c penetrates in the vertical direction and communicates with the hole portion 3 a and opens to the longitudinal end portion side of the main frame 3. The second roller 4 is rotatably supported in the notch 3c.

  The second roller 4 is a rolling bearing and is rotatably supported by a support plate 8 provided on the lower surface 3d of the main frame 3. The upper end of the second roller 4 is disposed at a position protruding upward from the lower inner surface 3a2 of the hole 3a of the main frame 3, and rolls in contact with the lower surface 15b of the slide frame 15. The amount of protrusion of the hole 3a of the second roller 4 from the lower inner surface 3a2 is determined in consideration of the fact that the slide frame 15 can move within the hole 3a of the main frame 3.

  Thus, in the slide frame 15, the first roller 17 provided at the end in the longitudinal direction comes into contact with the upper inner surface 3a1 of the hole 3a of the main frame 3 so as to roll freely, and the end in the longitudinal direction of the slide frame 15 Since the side away from the second frame 4 is movably supported by the second roller 4 provided on the main frame 3, the slide frame 15 is movably supported in the hole 3 a of the main frame 3. Further, since the first roller 17 and the second roller 4 are constituted by rolling bearings, the resistance when the slide frame 15 is moved is relatively small. For this reason, the slide frame 15 can be quickly and easily moved with respect to the main frame 3.

  A lock mechanism 60 capable of locking the slide frame 15 to the main frame 3 is provided at the longitudinal end of the main frame 3. The lock mechanism 60 includes an upper lock plate 61 that covers the upper side of the slide frame 15, a lower lock plate 63 that covers the lower side of the slide frame 15, and a fastening means 65 that fastens these lock plates. .

  The upper locking plate 61 is arranged and supported so as to extend from the longitudinal end portion of the main frame 3 in the extending direction of the main frame 3, and extends forward from the connection support frame 25 disposed on the rear side of the main frame 3. 26.

  The upper lock plate 61 includes a fastening plate upper 61a extending along the upper surface and one side surface of the main frame 3, and a pair of flange portions 61b extending from both ends of the fastening plate upper 61a. The fastening plate upper 61a is bent at an intermediate portion having an angle of approximately 90 °, and the flange portion 61b is provided with a hole through which a shaft portion of a bolt 66 which is a part of the fastening means 65 is passed.

  The lock plate lower 63 is disposed below the slide frame 15 extending from the main frame 3, and extends from the lower surface of the slide frame 15 along the other side surface and from both ends of the lower plate 63a. It has a pair of extending flange parts 63b. The lower part of the fastening plate 63a is bent with an angle of about 90 °, and the flange part 63b is provided with a hole through which the shaft part of the bolt 66 which is a part of the fastening means 65 passes. A lower lock plate 63 is disposed below the upper lock plate 61, a rectangular space 68 is formed inside the upper fastening plate 61a and the lower fastening plate 63a, and the flange portion 61b and the flange portion 63b are disposed opposite to each other. The In the space portion 68, when the flange portion 61b and the flange portion 63b arranged to face each other are separated (see FIG. 4), the slide frame 15 can be moved, and the flange portion 61b and the flange portion 63b approach each other. When the state is reached (see FIG. 3), the slide frame 15 is fastened by the fastening plate upper 61a and the fastening plate lower 63a that are arranged to face each other, and the movement of the main frame 3 is restricted.

  Bolts 66 are inserted into the holes of the flange portion 61b and the flange portion 63b that are arranged to face each other and screwed into a nut 67 that is a part of the fastening means 65, and the lock plate lower portion 63 is connected to the lock plate upper portion 61. ing. For this reason, when the tightening of the nut 67 that is screwed into the bolt 66 is increased, the lower lock plate 63 moves to the upper lock plate 61 side, the slide frame 15 moves upward, and the upper surface 15a of the slide frame 15 moves to the main frame 3. It is pressed against the upper inner surface 3a1 of the hole 3a. Therefore, the movement of the slide frame 15 is restricted, and the slide frame 15 can be locked (see FIG. 3).

  On the other hand, when the tightening of the nut 67 that is screwed into the bolt 66 is weakened, as shown in FIG. 4, the lower lock plate 63 moves away from the upper lock plate 61 and the slide frame 15 moves downward. 15 a is not in contact with the upper inner surface 3 a 1 of the hole 3 a of the main frame 3. Therefore, the slide frame 15 becomes movable and the slide frame 15 can be unlocked.

  Next, the case where the slide frame 15 is extended with respect to the main frame 3 will be described with reference to FIGS. 2 (a), 2 (b), and 5. FIG. First, the slide frame 15 is unlocked by the lock mechanism 60. The handle 23 is gripped and the slide frame 15 is moved in the extending direction with respect to the main frame 3 through the tillage unit 20. When the slide frame 15 moves to a position where it has a desired length, the movement of the slide frame 15 is stopped (see FIGS. 2A and 2B). Then, the slide frame 15 is locked by the lock mechanism 60. Although the drawing shows the case where the slide frame 15 is substantially fully extended with respect to the main frame 3, the extension amount of the slide frame 15 is adjusted in accordance with the field conditions such as between the crops and between the plants. Can be any size.

  On the other hand, in order to reduce the extended slide frame 15, the slide frame 15 is unlocked by the lock mechanism 60, the handle 23 is gripped, and the slide frame 15 is interposed via the tillage unit 20 provided on the slide frame 15. Are moved in the reduction direction with respect to the main frame 3. When the slide frame 15 moves to a position where it has a desired length, the movement of the slide frame 15 is stopped (see FIGS. 5A and 5B). Then, the slide frame 15 is locked by the lock mechanism 60. Although the drawing shows the case where the slide frame 15 is substantially fully reduced with respect to the main frame 3, the reduction amount of the slide frame 15 is arbitrary in consideration of the width of the road, the width of the traveling body, and the like. The size can be

  Thus, since the slide frame 15 is configured to be able to expand and contract with respect to the main frame 3, the slide frame 15 is reduced when traveling on the road so that the middle plowing weeder 1 is attached to the rear portion of the traveling machine body 90. You can drive on the road. Further, since the slide frame 15 is movably supported via the first roller 17 and the second roller 4 which are rolling bearings, friction generated between the slide frame 15 and the main frame 3 is small, and the slide frame 15 Since the force required for expansion / contraction is small, the expansion / contraction work of the slide frame 15 can be performed quickly and in a short time.

  Moreover, since the means for moving the slide frame 15 is composed of the first roller 17 and the second roller 4 made of rolling bearings, the structure is simple and the increase in the manufacturing cost of the middle tillage weeder 1 can be suppressed. it can.

  In the above-described embodiment, the case where the first roller 17 is provided at the longitudinal end portion of the slide frame 15 via the support plate 16 is shown. However, the first roller 17 is disposed at the longitudinal end portion of the slide frame 15. It may protrude upward from the upper surface 15a on the side and be supported rotatably.

  In the above-described embodiment, the first roller 17 and the second roller 4 are the rolling bearings themselves, but may be configured by mounting an annular body on the outer periphery of the support shaft. If it does in this way, a roller can be reduced in size and the increase in cost can be suppressed more. Further, the first roller 17 and the second roller 4 may be configured such that the rotation shaft itself is rotatably supported as a rotating body, or is configured such that the rotating body rotates slidably with respect to the rotation shaft. Good. If it does in this way, the material which does not corrode easily can be used for a rotating body, the lifetime of a rotating body can be extended, and the number of parts can reduce and the increase in cost can be suppressed more. Further, the main frame 3 and the slide frame 15 described above are not limited to square pipes having a quadrangular cross section.

DESCRIPTION OF SYMBOLS 1 Medium tillage weeder 3 Main frame 3a Hole 3a1 Upper inner surface 3b Opening 4 Second roller 15 Slide frame 15b Lower surface 17 First roller 20 Middle tillage unit

Claims (3)

A main frame that extends in the horizontal direction and is supported and has a hole penetrating inside, and a middle tilling unit that is inserted into the hole so as to project freely from an opening that opens to one end of the main frame and performs a middle tillage operation are attached. A plowing weeder having a sliding frame,
A first roller that is rotatably provided at a longitudinal end portion of the slide frame that is inserted into the hole portion, and whose upper end rolls in contact with the inner upper surface of the hole portion of the main frame;
The main frame is rotatably supported between a pair of support plates that project from the position where the first roller contacts the opening to the lower surface side, and the upper end contacts the lower surface of the slide frame. A second roller that rolls,
The slide tiller is characterized in that the slide frame is movably supported by the main frame via the first roller and the second roller. The inner upper surface of the hole is formed in a planar shape along the direction in which the main frame extends,
The middle plowing weeder according to claim 1, wherein a lower surface of the slide frame is formed in a planar shape along a direction in which the slide frame extends. The said 1st roller and the said 2nd roller are rolling bearings. The intermediate tillage weeder according to claim 1 or 2 characterized by things.

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