JP2005046129A - Farm working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a farm working vehicle that can automatically run along ridges. <P>SOLUTION: This farm working vehicle 1 is equipped with a machine body 4 that is supported with left and right front wheels 2 and left and right rear wheels 3 that are arranged to stride a ridge and with a drive part 7 for driving the rear wheels 3. Further, the farm working vehicle 1 has at least two pairs of guide rollers 9 that are individually arranged on both sides of the ridge so that peripheral face of the guide roller 9 may come into contact with the side face of the ridge and rotate as the machine body 4 moves forward. At the same time, one pair of the ridge guide rollers 9 are arranged in front of the front wheels 2 and the other pair is arranged between the front wheels 2 and the rear wheels 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention, for example, stretches or collects a sheet on the upper surface of a cocoon, plants seeds / seedlings of vegetables / flowers on the cocoon, and sprays fertilizers, chemicals, water, etc. on the cocoons / vegetables / flowers planted there. The present invention also relates to various farm work vehicles for sitting on a seat supported at a low position near the upper surface of the eaves and performing agricultural work on the eaves of the field.

  The thing described in patent document 1 is illustrated as a conventional agricultural work vehicle. As shown in FIG. 6, this agricultural work vehicle 81 has a battery and a pair of left and right front wheels 83 at the front, and a pair of left and right rear wheels 84 and a traveling motor 85 that rotationally drives the rear wheels 84 and a transmission at the rear. A case 86 and a steering handle portion 87 projecting rearward are provided. The farm work vehicle 81 has a front wheel 83 and a rear wheel 84 running between the ridges so as to straddle the ridges in the field, and an operator who sits on the riding section 88 and puts his feet on the left and right steps 90 is a seedling platform. When the seedling on 91 is taken out, the seedling is planted on the upper surface of the ridge U from the work space portion 99.

JP 2003-38008 A

  However, the rod U is hardly formed accurately in a straight line, and the state between the rods in which the front wheels 83 and the rear wheels 84 travel is not constant. There is a problem that it is necessary to adjust the traveling direction frequently so as to travel along the ridges, which requires labor and reduces the efficiency of farm work. In particular, when traveling along a saddle U provided along a contour line of an inclined ground, the machine body of the agricultural work vehicle 81 is inclined, so that the vehicle always moves toward the lower side of the slope, and a great effort is required to adjust the traveling direction. Therefore, there is a problem that the efficiency of farm work is greatly reduced.

  An object of the present invention is to solve the above-described problems and provide an agricultural vehicle that automatically travels along a fence.

  In order to achieve the above object, the agricultural vehicle according to the first aspect of the invention is supported by the left and right front wheels and the left and right rear wheels arranged so as to straddle the heel so as to be able to run in the front-rear direction which is the heel length direction. A farm work vehicle comprising an airframe and a drive unit for driving the front wheel and / or the rear wheel, wherein a peripheral surface abuts on a side surface of the heel and rolls as the aircraft progresses. A pair of scissors guide rollers each provided is provided.

  Further, the agricultural vehicle according to the second aspect of the invention includes a machine body that is supported by a left and right front wheel and a left and right rear wheel arranged so as to straddle a fence so as to be able to travel in the front-rear direction, which is a longitudinal direction of the fence, and the front wheel or And / or a farm work vehicle having a drive unit for driving the rear wheel, the pair of which is disposed on both sides of the rod so that the peripheral surface abuts on the side surface of the rod and rolls as the aircraft moves. At least two sets of heel guide rollers are provided.

  According to these configurations, since one pair or at least two pairs of left and right saddle guide rollers are provided, the entire body of the aircraft can be used even with a saddle that is not formed in a straight line or a saddle that is provided along the contour line of an inclined land. Can be reliably driven along the heel. For this reason, the worker can concentrate on the farm work.

  As an agricultural work vehicle of 3rd invention, in the said 1st or 2nd invention, the aspect which provided one set of the said heel guide rollers in front of the said front wheel is illustrated.

  According to this configuration, the aircraft body can be reliably guided to the kite by the kite guide roller before the front wheel travels on the kite, that is, the traveling direction of the model body can be easily along the kite.

  As an agricultural work vehicle according to a fourth aspect of the invention, in the second aspect of the invention, one set of the heel guide rollers is provided in front of the front wheel, and another set is provided between the front and rear wheels. .

  According to this configuration, before the front wheel travels on the saddle, the fuselage guide roller can reliably guide the fuselage to the saddle, and the length of the fuselage can be shortened. improves.

  As an agricultural work vehicle according to a fifth aspect of the present invention, in the first to fourth aspects of the invention, the body is provided at a substantially central portion in the longitudinal direction of the body, and a joint portion for folding the body in half, The aspect provided with the fixing | fixed part for fixing in the state which extended the joint part is illustrated.

  According to this configuration, the airframe can be folded into approximately half the length, and can be efficiently stored in the mounting / storage space.

  The farm vehicle according to a sixth aspect of the present invention includes the grounding portion that contacts the ground and a support portion that supports the airframe against the grounding portion in the first to fifth aspects of the invention. And the aspect which provided the turn stand which supports the said body with respect to the ground so that turning is possible in the state which floated the said rear wheel from the ground is each provided in the both right and left sides of the said body.

  According to this configuration, when the direction of the aircraft is changed by turning it on a ridge, the aircraft is supported by the turning stand on the side of the turning direction so that the aircraft can turn, An operator can lift the anti-turning direction side and turn the body one point around the turning stand. For this reason, the direction of the aircraft can be changed by one worker. At this time, the turning stand supports the front wheel and / or the rear wheel in a state of floating from the ground. It is possible to prevent the kite from collapsing when turning.

  As a farm vehicle according to a seventh aspect of the present invention, in the sixth aspect of the invention, the swivel stand is in a supporting state in which the grounding portion is grounded to the ground to support the body, and the grounding portion is separated from the ground and the body. An example is provided that includes a state holding unit that is provided so as to be movable between a retracted state that does not support the support and that is selectively held in either the supported state or the retracted state.

  According to this configuration, when the airframe is turned, the swivel stand can be held in the supporting state, and when the airframe can run, the swivel stand can be held in the retracted state.

  As an agricultural work vehicle according to an eighth aspect of the invention, in the seventh aspect, the swivel stand is rotatable between the support state and the retracted state around the base end side of the support portion. The aspect supported by the body is illustrated.

  According to this configuration, the farm vehicle according to the seventh aspect of the invention can be embodied with a simple configuration.

  As an agricultural work vehicle according to a ninth aspect of the invention, in the sixth to eighth aspects of the invention, the turning stand is configured such that the grounding portion is in contact with the ground substantially below the front wheel or the rear wheel. Illustrate.

  According to this configuration, the airframe can be turned around a position substantially directly below the front wheel or the rear wheel. The front wheel or the rear wheel is a part in contact with the ground, and is a part that is disposed at a position closest to the ground in the entire farm vehicle, so that the front wheel or the rear wheel does not break the heel when turning, This part is reliably lifted from the ground so as to turn the aircraft.

  As an agricultural work vehicle according to a tenth aspect of the invention, in the sixth to ninth aspects of the invention, the swivel stand illustrates a mode in which the grounding portion is rotatably attached to the support portion.

  As an agricultural work vehicle according to an eleventh aspect of the invention, in the sixth to ninth aspects of the invention, the swivel stand is configured such that the grounding portion is configured to be grounded so as to be rotatable with respect to the ground.

  According to the configuration of the tenth or eleventh invention, the airframe can be turned easily.

  According to the agricultural vehicle according to the present invention, there is an excellent effect that the vehicle can automatically travel along the fence.

  1 to 5 show a farm vehicle 1 according to a first embodiment that embodies the present invention. The farm vehicle 1 includes a machine body 4 that is supported by a left and right front wheel 2 and a left and right rear wheel 3 that are disposed so as to straddle the fence U so as to be able to run in the front-rear direction that is the longitudinal direction of the fence, and the front of the front wheel 2. A pair of rod guide rollers 9 provided so as to be located on both sides of the rod U, and a pair of rod guide rollers 9 provided so as to be located on both sides of the rod U between the front wheel 2 and the rear wheel 3, respectively. A seat 5 supported by the airframe 4 at a low position near the upper surface of the heel, a drive unit 7 for driving the rear wheel 3 by the power of the engine 8 as a prime mover, and a work table supported above the front wheel 2 And a preliminary seedling case base 10 on which a preliminary seedling case 10a is placed so as to be supported above the engine 8.

  The airframe 4 includes a pair of left and right side frames 11 extending in the front-rear direction, a first horizontal frame 12 that connects the front sides of the two side frames 11 to each other, a second horizontal frame 13 that connects the middle portions to each other, and a rear side that connects to each other. And a pair of front and rear third horizontal frames 14, 14. The first horizontal frame 12 is formed in a shape in which an intermediate portion projects upward in front view so as not to interfere with the flange U. Then, both end portions of the first horizontal frame 12 are formed as turning handles 15 by extending obliquely forward from the side of the machine body 4. The turning handle 15 is held, and the body 4 can be turned by lifting the front wheel 2 in a state where at least one of the rear wheels 3 is grounded. The seat 5 is supported on the second horizontal frame 13 so that the operator is seated in the heel length direction. The second horizontal frame 13 is supported so that the vertical position can be adjusted with respect to the side frame 11, whereby the height of the seat 5 can be adjusted. A drive unit 7 is supported on the third horizontal frames 14, 14. An accelerator lever 26 that adjusts the rotational speed of the engine 8 is disposed behind the seat 5 in the airframe 4.

  The front wheel 2 is rotatably supported by front leg portions 17 attached to both left and right end portions on the front side of the body 4. The rear wheel 3 is rotatably supported at both left and right end portions on the rear side of the body 4. The front wheel 2 and the rear wheel 3 are provided so as not to turn in directions, and are arranged on the left and right sides so as to travel on the same track when traveling straight.

  At the rear of both front wheels 2, footrests 18 respectively supported by the side frames 11 via U-shaped support frames 19 project toward the inside of the machine body. In addition, a drive adjustment pedal 20 for operating the drive of the rear wheel 3 by the drive unit 7 is provided in front of the footrest 18 on the right side (which may be the left side or both sides). The drive adjustment pedal 20 is supported by the support frame 19 via a support arm 21 so as to be tiltable up and down. The drive adjusting pedal 20 is connected to a clutch 24, which will be described later, via a wire 23. The wire 23 is a spring (not shown) as an urging means so as to urge the drive adjusting pedal 20 upward on the clutch 24 side. ). In this example, the clutch 24 is disengaged when the drive adjusting pedal 20 is pushed down by the operator's foot.

  The scissors guide roller 9 is rotatably supported by a mounting portion 30 that protrudes from the side frame 11 toward the inside of the machine body via a support portion 31. The support portion 31 includes a left / right adjustment portion 32 that adjusts the attachment position in the left / right direction with respect to the attachment portion 30, an inclination adjustment portion 33 that adjusts the inclination of the shaft 9 a of the heel guide roller 9 with respect to the left / right adjustment portion 32, and the inclination adjustment. And a vertical adjustment portion 34 that adjusts the vertical mounting position of the shaft 9a with respect to the portion 33, and as shown in FIG. The left and right position, inclination, and vertical position of the eyelid guide roller 9 can be optimally adjusted so as to roll with it.

  The size of the heel guide roller 9 is preferably set so that the diameter Dr is as large as possible and the width Wr can be in wide contact with the side surface of the heel U (see FIG. 3). This increases the area of the peripheral surface of the heel guide roller 9 that contacts the side surface of the heel U. Therefore, when the heel guide roller 9 contacts, the side surface of the heel U is excessively pressed, the heel U is collapsed, It is possible to prevent the sheet S stretched on U from being damaged. In this example, the diameter Dr is set to about 200 mm and the width Wr is set to about 120 mm for the ridge U having a ridge width Wu of about 500 to 550 mm and a ridge height Hu of about 300 mm.

  As shown by a two-dot chain line arrow in FIG. 2, the seedling stage 6 is attached so as to be rotatable in a plan view, and the position can be adjusted according to the physique of the operator. .

  The drive unit 7 includes an engine 8 as a prime mover supported on the rear side of the machine body 4, a deceleration transmission 35 coupled to the engine 8, and a power transmission mechanism 36 coupled to the deceleration transmission 35 via a clutch 24. And. The deceleration mission 35 has a built-in high-speed or low-speed two-stage transmission mechanism that can be switched by the transmission lever 40. Thus, by setting the two-stage speed change mechanism to the high speed side when the planting pitch is wide and to the low speed side when the planting pitch is narrow, the rotational speed of the engine 8 is suppressed particularly at high speed, so that low noise and energy saving are achieved. I have to. The power transmission mechanism 36 includes a transmission shaft 37 that is rotatably supported by the body 4 and extends to the left and right, and rotation of the output shaft of the clutch 24 is performed via a first transmission element 38 (chain transmission mechanism in this example). And transmitted to the transmission shaft 37. The rotation of the transmission shaft 37 is transmitted to the rear wheels 3 on both sides via second transmission elements 39 (chain transmission mechanisms in this example) provided at both ends thereof.

  Next, a series of operation methods of the agricultural farm vehicle 1 will be described. Here, an example in which a seedling is planted on the ridge U is shown. First, the farm work vehicle 1 is installed in the heel length direction so that the left and right front wheels 2 and rear wheels 3 straddle the heel U. A seedling to be planted is placed on the seedling placing stand 6, and a spare seedling is placed on the spare seedling case 10a. Next, the basic traveling speed is set by the speed change lever 40 according to the seedling planting pitch. Next, the engine 8 is started, and the operator sits on the seat 5 facing the heel length direction, and the left and right feet are placed on the left and right footrests 18 respectively, and the accelerator lever 26 is adjusted appropriately to suit the desired farm work. The vehicle body 4 is made to travel at a constant speed. Then, the operator takes a posture of slightly leaning forward, takes out the seedling from the seedling placing stand 6, and sequentially plants the seedling at the planting position of the heel U. At this time, even if the kite U is bent or the kite U is inclined, the farm work vehicle 1 is automatically driven along the kite U by the kite guide roller 9. Does not need to adjust the traveling direction of the airframe 4, and can concentrate on farm work. In addition, even when working in the width direction of the heel U, the operator does not need to change the working posture almost, and can cope with it only by spreading his arms left and right. Further, for example, when it takes time for planting work, if the drive adjustment pedal 20 is depressed, the clutch 24 is disengaged, so that traveling can be temporarily stopped. Then, when the drive adjustment pedal 20 is released, traveling at the original constant speed is resumed. At this time, the operator only needs to depress and release the drive adjustment pedal 20, so that the operator hardly needs to change the working posture.

  According to the agricultural work vehicle 1 of the present invention configured as described above, the pair of left and right heel guide rollers 9 are provided with two sets of front and rear spaced apart from each other. Even with the kite U provided along the contour line, the entire body 4 can be reliably traveled along the kite U. For this reason, the worker can concentrate on the farm work.

  In addition, since one set of the saddle guide roller 9 is provided in front of the front wheel 2, the machine body 4 can be reliably guided to the saddle U by the saddle guide roller 9 before the front wheel 2 travels on the saddle U.

  In addition, since another set of saddle guide rollers 9 is provided between the front wheel 2 and the rear wheel 3, the length of the machine body 4 can be shortened and the workability of handling such as turning can be improved.

  Further, since the heel guide roller 9 is not provided on the rear side of the rear wheel 3, which is a part that descends when the pedestal handle 15 is lifted, the heel guide roller 9 is used for handling such as turning. There is no hindrance.

  Next, FIGS. 7-11 has shown the agricultural work vehicle 50 of 2nd embodiment which actualized this invention. The agricultural work vehicle 50 of this embodiment is different from the first embodiment mainly in the following points. Accordingly, parts common to the first embodiment are denoted by the same reference numerals as those in the first embodiment, and redundant description is omitted (hereinafter the same applies to other embodiments).

  The airframe 51 of the present example is provided substantially in the center of the airframe 51 in the longitudinal direction (front-rear direction), and is fixed in a state in which the joint 52 is extended and the joint 52 is extended. And a fixing portion 53 for the purpose.

  In the joint portion 52, each side frame 11 is divided into two frame pieces 11a and 11b at substantially the center in the length direction, and the front and rear frame pieces 11a and 11b are relatively rotated by the shaft support portion 54 at the division position. It is supported freely. The shaft support portion 54 supports both the frame pieces 11a and 11b with a shaft 54a extending in the left-right direction above the joint portion between the both frame pieces 11a and 11b. The two frame pieces 11a and 11b are joined in a state in which their end faces are joined to each other and extend in a straight line (see the solid line in FIG. 10, FIG. 7 and FIG. 8), and in a bent state in a substantially V shape (see FIG. 10). Between the two-dot chain line and FIG. 9).

  The fixing portion 53 is connected to the locked portion 57 provided on one frame piece (in this example, the front frame piece 11a) and the other frame piece (in this example, the rear frame piece 11b) in the joint portion 52. It consists of a locking portion 58 provided. The locked portion 57 protrudes below the end of the front frame piece 11a. The locking portion 58 is provided with a lever 60 rotatably attached to a lower side of the end of the frame piece 11b on the rear side by a shaft 59 extending in the left-right direction, and extends in the left-right direction at an intermediate portion in the length direction of the lever 60. And a locking piece 62 rotatably attached to a shaft 61. Then, the end surfaces of both frame pieces 11a and 11b are joined to each other (see arrow a in FIG. 10), the locking piece 62 is locked to the locked portion 57 (see arrow b in FIG. 10), and the lever When 60 is turned to the opposite side (see arrow c in FIG. 10), both frame pieces 11a and 11b are fixed in a linearly extending state. Further, when the reverse procedure is performed, the fixation is released. In addition to this, a second fixing portion (not shown) for fixing the airframe 51 in a folded state may be provided.

  Needless to say, the joint portion 52 and the fixing portion 53 described above are merely examples, and are not particularly limited thereto. For example, the joint portion 65 and the fixing portion 66 shown in FIG. That is, the joint portion 65 includes a shaft support portion 54 configured to fit within the cross-sectional shape of both the frame pieces 11a and 11b. The fixing portion 66 includes a cylindrical body 67 slidably fitted to both frame pieces, and a fixing bolt 68 for fixing the position of the cylindrical body 67 with respect to the side frame 11. Then, as shown by a solid line in FIG. 11, in a state in which the cylindrical body 67 is externally fitted to both the frame pieces 11a and 11b, the joint portion 65 is fixed in an extended state, and FIG. In the state where the cylindrical body 67 of the fixing portion 66 is externally fitted only to one frame piece 11b (or 11a), the joint portion 65 can be folded in two.

  With the above configuration, in the agricultural vehicle 50 of this example, by operating the locking portion 58, the fixing portion 53 can be released and the body 51 can be bent at the joint portion 52. In this bent state, as shown in FIG. 9, the first horizontal frame 12 is placed on the spare seedling case base 10. Thus, in the agricultural work vehicle 50 of this example, the machine body 51 can be folded into approximately half length, and can be efficiently stored in the mounting / storage space.

  In addition, as shown in FIG.7 and FIG.8, the 1st horizontal frame 12 of this example is formed so that the inner side of the left and right side frames 11 may protrude ahead. Thereby, the work space with respect to the ridge U can be ensured widely.

  Further, the deceleration transmission 35 of this example incorporates a continuously variable transmission mechanism that can be adjusted by a transmission lever 40. Thereby, the deceleration amount can be appropriately adjusted according to the planting pitch and the operator's work speed. In this example, the same two-speed transmission mechanism as in the first embodiment may be adopted, or the continuously variable transmission mechanism of this example may be adopted in the first embodiment.

  According to the farm work vehicle 50 of the present embodiment, in addition to the effects of the first embodiment, the effects specific to the present embodiment can be obtained.

  Next, FIGS. 12-18 has shown the agricultural work vehicle 101 of 3rd embodiment which actualized this invention. The agricultural work vehicle 101 of this embodiment is different from the second embodiment mainly in the following points.

  The farm work vehicle 101 of this example is provided with a swivel stand 102 on each of the left and right sides of the machine body 51. The swivel stand 102 includes a grounding unit 103 that contacts the ground, and a support unit 104 that supports the body 51 with respect to the grounding unit 103, and turns the body 51 with the rear wheel 3 floating from the ground. It is designed to support the ground as much as possible.

  As shown in FIG. 16, the swivel stand 102 is supported by the side frame 11 of the machine body 51 via the support shaft 102 a on the base end side of the support portion 104, and on the base end side of the support portion 104, A stopper pin 105 as a stopper means protrudes at a position away from 102a. The stopper pin 105 is provided on the side frame 11 when the grounding portion 103 is in contact with the ground to support the airframe 51 and in the retracted state Sb in which the grounding portion 103 is not separated from the ground and supports the airframe 51. It comes in contact with the lower surface. Thereby, the rotation range of the swivel stand 102 is limited between the support state Sa and the retracted state Sb. Thus, the swivel stand 102 moves between a support state Sa in which the grounding unit 103 contacts the ground and supports the airframe 51, and a retreat state Sb in which the grounding unit 103 leaves the ground and does not support the airframe 51. It is provided as possible.

  Further, the swivel stand 102 includes a spring support 108 protruding upward on the side frame, and a tension spring member 109 as a state holding means attached between the upper end of the spring support 108 and the tip of the stopper pin 105. And. The tension spring member 109 acts to pull up the stopper pin 105 upward, thereby selectively holding the swivel stand 102 in either the support state Sa or the retracted state Sb. Yes.

  As shown in FIG. 16, the grounding portion 103 is supported by a spherical bearing 111 so as to be rotatable and spherically movable with respect to the support portion 104. And this grounding part 103 is comprised so that when the turning stand 102 exists in support state Sa, it earth | grounds to the ground of the direct lower side of the rear-wheel 3. FIG. The swivel stand 102 can also be configured such that the grounding unit 103 is grounded so as to be rotatable with respect to the ground.

  Next, a method of turning the agricultural work vehicle 101 by the turning stand 102 will be described. Here, a case where the farm work vehicle 101 is turned 180 ° clockwise by one worker at the end of the ridge U is illustrated. First, the agricultural work vehicle 101 is stopped at the end of the ridge U (see FIG. 12 and the solid line state in FIG. 18). Next, the airframe 51 near the rear wheel 3 on the turning direction side (right side in this example) is lifted by hand, the rear wheel 3 is lifted, and the turning stand 102 is lowered to the support state Sa. When the machine body 51 is lowered, the machine body 51 is supported by the turning stand 102 on the turning direction side (see FIG. 15). At this time, the grounding portion 103 of the swivel stand 102 is set to be approximately at the center in the width direction between the ridges U. Next, when the aircraft 51 is lifted by holding the turning handle 15 provided in the vicinity of the front wheel on the side opposite to the turning direction (left side in this example), the aircraft 51 is in a state where it can turn at one point around the turning stand 102. (See FIG. 17). Then, the airframe 51 is turned while the airframe 51 is lifted (turned from the solid line state of FIG. 18 to the two-dot chain line state). At this time, the swivel stand 102 can be maintained in the support state Sa by turning the swivel handle 15 while raising the swivel handle 15 side so that a load is applied to the swivel stand 102 side of the airframe 51 (the swivel stand 102 is maintained in the support state Sa). (There is no return to the evacuation state Sb). Next, the body 51 is lowered and the turning handle 15 is released (see FIG. 15 and the state of the two-dot chain line in FIG. 18). Next, when the vehicle body 51 near the rear wheel 3 in the turning direction side is lifted by hand, the rear wheel 3 is lifted, and the turning stand 102 is raised to the retracted state Sb, the turning is completed (see FIG. 12).

  According to this turning stand 102, when turning the body 51 on the heel U to change the direction, the turning body 102 is supported by the turning stand 102 on the turning direction side so that the body 51 can turn. The operator can lift the airframe 51 in the direction opposite to the turning direction and turn the airframe 51 around the turning stand 102 at one point. In this way, the orientation of the machine body 51 can be changed by one worker. At this time, since the turning stand 102 supports the rear wheel 3 in a state of floating from the ground, the rear wheel 3 can be made difficult to come into contact with the kite U when the airframe 51 turns. It is possible to prevent the heel U from being broken. Conventionally, when one-point turning is performed around the rear wheel 3 in the heel U, the rear wheel 3 interferes with the heel U as shown by a two-dot chain circle in FIG. In order to break down, for example, a rotary table (not shown) was placed under the rear wheel 3, but there was a problem that carrying it was troublesome and the work between the narrow rods U was difficult, According to the swivel stand 102, this can be solved.

  In addition, the swivel stand 102 is movable between a support state Sa in which the grounding unit 103 contacts the ground and supports the airframe 51 and a retreat state Sb in which the grounding unit 103 is separated from the ground and does not support the airframe 51. And provided with a state holding means for selectively holding in either the support state Sa or the retracted state Sb, the swivel stand 102 is set to the support state Sa when the body 51 is turned. When the airframe 51 is caused to travel, the swivel stand 102 can be held in the retracted state Sb.

  Further, the swivel stand 102 can be embodied with a simple configuration that is supported by the machine body 51 so as to be rotatable around the base end side of the support portion 104 between the support state Sa and the retracted state Sb. it can.

  In addition, the turn stand 102 is configured such that the grounding portion 103 is in contact with the ground substantially directly below the rear wheel 3, so that the airframe 51 can be turned around a position substantially directly below the rear wheel 3. Since the rear wheel 3 is a part in contact with the ground and is located at the position closest to the ground in the entire agricultural work vehicle 101, the rear wheel 3 is placed on the ground so that the rear wheel 3 does not collapse when turning. Thus, the airframe 51 can be swung by being reliably lifted.

  Moreover, since the grounding part 103 is rotatably attached to the support part 104, the swivel stand 102 can turn the body 51 easily.

  In addition, as shown in FIGS. 12 to 15, the agricultural working machine of the present example punches holes at a regular interval in the center in the width direction of the upper surface of the ridge U or the multi-film stretched on the ridge U. A container 115 is provided. The perforator 115 is attached to a frame 116 that is installed at the distal ends of the left and right attachment portions 30, and a swing arm 117 that is supported on the middle portion in the length direction of the frame 116 so as to be swingable up and down. And a perforating roller 118 rotatably supported at the tip of the swing arm 117. In addition to this, an urging means (not shown) for urging the swing arm 117 downward may be provided so that the hole U or the like can be reliably punched. On the peripheral surface of the perforating roller 118, three perforating blades 119 project from the peripheral length direction at regular intervals. According to this puncher 115, as the machine body 51 advances, it is possible to automatically make a hole in the heel U or the like, so that it is possible to save the trouble of making a hole for transplanting a seedling or the like. Moreover, since the holes are opened at regular intervals, seedlings and the like can be transplanted at regular intervals.

  Further, the footrest 18 of this example is a rotary pedal type that rotates around an axis extending in the width direction of the body 51. For this reason, the inclination of the foot can be freely adjusted according to the preference of each worker.

  Further, the deceleration mission 35 of the present example incorporates a continuously variable transmission mechanism and can be switched between forward and reverse by a switching lever (not shown). For this reason, it is also possible to work while moving the aircraft 51 backward.

  Further, as shown in FIG. 13, the drive adjusting pedal 20 of the present example is connected to the clutch 24 through the wire 23 and is also connected to the brake 122 through the wire 121. The brake 122 of this example is configured to press against the rear wheel 3 and stop its rotation. When the drive adjustment pedal 20 is depressed, the clutch 122 is disengaged and the brake 122 is activated at the same time. For this reason, when the clutch 24 is disengaged by the drive adjusting pedal 20, the brake 122 is also operated at the same time, so that the machine body 51 does not move backward even on an uphill slope, and the work can be performed smoothly.

  According to the agricultural work vehicle 101 of this embodiment, in addition to the effects of the second embodiment, the effects specific to the present embodiment can be obtained.

  Next, FIGS. 19 to 26 show an agricultural work vehicle 131 according to a fourth embodiment that embodies the present invention. FIG. 19 is a plan view showing the overall configuration of the farm work vehicle 131 of this example. As shown in FIG. 19, the farm work vehicle 131 of this example is different from the second embodiment in turning handles 132 and 133, guides. A roller 134, a guide roller support portion 135, a support piece 136 of the seedling table 6, a spare seedling case support portion 137, a swivel stand 138, and a rear wheel 139 are different. Hereinafter, each difference will be described.

(A) As shown in FIGS. 19 and 20, the turning handles 132 and 133 are provided by using a part of the airframe 51. In the turning handle 132, both corners on the front end side of the machine body 51 are covered with a flexible material (rubber, soft resin, etc.). Further, the turning handle 133 is covered with a material having flexibility (similar to the turning handle 132) in the middle portion of the side frame 11 of the body 51 in the length direction. Specifically, in this example, the airframe 51 is provided with a joint portion (not shown) and a fixing portion 66 similar to those in FIG. 11 in the second embodiment. It is covered with some material. The fixing portion 66 of this example is fixed to both frame pieces 11a and 11b by two fixing bolts 68 at the front and rear. Then, for example, as in FIG. 18, when turning the aircraft 51 to the right, the operator is positioned on the left side of the aircraft and has the left and right hands and the left and right turning handles 132 and 133. According to this configuration, the swivel handles 132 and 133 are configured using a part of the airframe 51, so that materials and assembly costs can be reduced. Moreover, since it hardly protrudes from the side of the airframe 51, it hardly interferes with an object on the side of the airframe 51 when the airframe 51 travels.

(B) As shown in FIG. 20, the eaves guide roller 134 includes a relatively hard cylindrical body 141 rotatably supported by a shaft 134a, and a cushion material 142 disposed on the peripheral surface of the cylindrical body 141. It has. Here, the relatively hard cylindrical body 141 is adopted so that the peripheral surface of the cylindrical body 141 can firmly hold the side surface of the heel U, and thereby the traveling direction of the body 51 is changed to the heel U. This is to make it easier to follow. The cylindrical body 141 is not particularly limited, but a hollow resin body is preferable because it can be reduced in weight. The reason why the cushion material 142 is provided on the peripheral surface of the cylindrical body 141 is to prevent the multi-film S stretched on the ridge U from being damaged. Although it does not specifically limit as the cushioning material 142, It is set as sponge, a brush, a fluff, etc. Although it does not specifically limit as a size of the heel guide roller 134, It illustrates carrying out similarly to 1st embodiment.

(C) The guide roller support portion 135 includes a left-right adjustment portion 145 that adjusts the attachment position in the left-right direction with respect to the attachment portion 30, and an inclination adjustment portion that adjusts the inclination of the shaft 134 a of the eaves guide roller 134 relative to the left-right adjustment portion 145. 146 and a vertical adjustment unit 147 that adjusts the vertical attachment position of the shaft 134a with respect to the inclination adjustment unit 146. The left / right adjustment portion 145 includes a cylinder 145 a that is slidably mounted on the attachment portion 30, and a fixing bolt 145 b that fixes the cylinder 145 a to the attachment portion 30. The tilt adjusting unit 146 includes a rotating member 146b supported by the cylindrical body 145a of the left / right adjusting unit 145 so as to be rotatable about the rotating shaft 146a, and an elongated hole 146c extending in an arc shape about the rotating shaft 146a. And a fixing bolt 146d for fixing the rotating position of the rotating member 146b at an arbitrary position in the arc length direction of the elongated hole 146c. The vertical adjustment unit 147 includes a holder member 149 having a U-shaped cross section that is fixed to the rotation member 146 b of the inclination adjustment unit 146. Each of the pair of upper and lower parallel plate portions 149a in the holder member 149 is provided with a through hole 149b, and the shaft 134a of the eaves guide roller 134 is slidably inserted into both the through holes 149b. The vertical plate portion 149c of the holder member 149 is provided with a female screw portion 149d, and the tip of the fixing bolt 150 screwed into the female screw portion 149d holds the shaft 134a in the axial thickness direction. The shaft 134a is pressed against and fixed to the inner peripheral surfaces of both through holes 149b of the holder member 149. Note that the left and right attachment portions 30 are connected by the same frame 116 as in the third embodiment. Thus, since the support part 135 is implement | achieved by the simple structure, cost can be reduced rather than the support part 31 of 1st embodiment.

(D) The support piece 136 of the seedling stage 6 supports the seedling stage 6 with respect to the machine body 51, and is attached to the vertically long portion 151 that extends substantially vertically and the upper end of the vertically long portion 151, and substantially laterally. And a horizontally long portion 152 extending in the horizontal direction. The vertically long portion 151 is provided with a vertically long hole 151a extending in the length direction thereof, and is attached to the body 51 via the vertically long hole 151a so that the vertical position can be adjusted by a bolt 153 as a fixing means. The laterally long portion 152 is provided with a laterally elongated hole 152a extending in the length direction thereof, and the seedling stage 6 can be adjusted in the lateral direction and the rotational position with a bolt 154 as a fixing means through the laterally elongated hole 152a. I support it. According to this structure, the position of the seedling placing stand 6 can be appropriately adjusted according to the shape of the ridge U, the physique of the worker, the body shape, the contents of the farm work, and the like.

(E) As shown in FIG. 23, the preliminary seedling case support portion 137 includes a pair of left and right front legs 156 and a pair of left and right rear legs 157. It is detachably supported by the airframe 51 via a support piece 158 attached to the horizontal frames 14 and 14. Since the spare seedling case support portion 137 has a symmetrical configuration, only the left side will be described below. The front leg portion 156 and the rear leg portion 157 are arranged in a substantially C shape in a side view as shown in FIG. These lower end portions 156a and 157a are bent forward and backward, respectively. Then, as shown by a two-dot chain line in the figure, the lower end portion 156a of the front leg portion 156 is fitted into the locked hole provided in the front support piece 158 from the rear side and locked, and the rear leg portion 157 Is elastically deformed forward, and is fitted and locked from the front side into a locked hole provided in the support piece 158 on the rear side (the front leg portion 156 and the rear leg portion 157 may be locked in reverse order). . According to this configuration, the preliminary seedling case support 137 can be easily attached to and detached from the machine body 51. In addition, the front leg portion 156 and the rear leg portion 157 are arranged in a letter C shape, and the lower end portions 156a and 157a are sandwiched between the front and rear support pieces 158 and 158, so that the preliminary seedling case When the preliminary seedling case is placed on the support portion 137, the lower end portions 156a and 157a are pressed against the front and rear support pieces 158 and 158, respectively, by the weight thereof, so that they are securely locked.

(F) The swivel stand 138 is detachably attached to the side frame 11 of the machine body 51 via the attachment / detachment section 160 as shown in FIG. The detachable portion 160 is attached to the side frame 11 by attachment means 161 (in this example, bolts and nuts respectively attached to two front and rear attachment holes 162 provided on the side frame). Specifically, the swivel stand 138 is supported at the base end side of the support portion 104 by the detachable portion 160 via the support shaft 138a, and at the base end side of the support portion 104 at a position away from the support shaft 138a. A stopper pin 105 as a stopper means is provided in a protruding manner. The stopper pin 105 includes a support state Sa (see FIG. 24C) in which the grounding unit 103 contacts the ground and supports the airframe 51, and a retracted state Sb in which the grounding portion 103 is not separated from the ground and supports the airframe 51. (Refer to FIG. 24A), it comes into contact with the lower surface of the detachable portion 160. Further, the swivel stand 138 includes a spring support portion 108 protruding upward from the attaching / detaching portion 160 and a tension spring member as a state holding means attached between the upper end portion of the spring support portion 108 and the tip end portion of the stopper pin 105. 109. Further, the swivel stand 138 of this example is configured such that the grounding surface of the grounding portion 103 is formed in a substantially hemispherical shape, and the grounding portion 103 is grounded so as to be rotatable with respect to the ground. According to this configuration, the swivel stand 138 is attached to the side frame 11 of the airframe 51 via the attaching / detaching portion 160, so that it can be easily attached to and detached from the airframe 51 as necessary. Therefore, for example, the swivel stand 138 can be removed because it is not necessary when there is sufficient swivel space at the furrows or at the end of the ribs.

(G) As shown in FIGS. 25 and 26, the rear wheel 139 uses a general-purpose wheel 165 such as a bicycle. On both sides of the shaft 165a of the wheel 165, a sprocket 167 attached to the sprocket seat 166 with attachment means (in this example, three bolts 166a) and a fixing portion 168 are attached. The sprocket seat 166 and the sprocket 167 and the fixing portion 168 are fastened by three sets of bolts 169 and nuts 170 as fastening means. The shaft 169a of the bolt 169 is inserted between the spokes 165b of the wheel 165, and comes into contact with the spoke 165b to prevent the sprocket 167 from rotating around the wheel 165. According to this configuration, the sprocket 167 can be easily assembled to the general-purpose wheel 165 so as to be detachable. For this reason, for example, compared with the case where the sprocket 167 is fixed to the wheel 165 by welding (when the wheel 165 and the sprocket 167 are integrated as a dedicated part), only the general-purpose wheel 165 can be easily replaced. Maintenance such as parts replacement becomes easy.

  According to the agricultural work vehicle 131 of the present embodiment, in addition to the effects of the second embodiment, the effects specific to the present embodiment can be obtained.

In addition, this invention is not limited to the said embodiment, For example, it can also be suitably changed and embodied as follows, for example in the range which does not deviate from the meaning of invention.
(1) The rear wheel 3 is provided with a turning handle for lifting the rear wheel 3 and turning the vehicle body 4 with at least one of the front wheels 2 in contact with the ground. A pair of scissors guide rollers 9 disposed on both sides of the scissors U so as to roll as they progress is provided so as to have at least two pairs spaced apart from each other on the rear side of the front wheels 2.
(2) The attachment position of the heel guide roller 9 to the machine body 4 is appropriately changed, or three or more sets of heel guide rollers 9 are provided.
(3) Instead of the seedling placing table 6 as a work table, a seedling accommodation basket as a work container is provided.
(4) Change the mounting position of the work table or work container as appropriate.
(5) A pedal for adjusting the accelerator is provided instead of or together with the drive adjustment pedal 20. For example, a pedal having the same configuration as that of the drive adjustment pedal 20 may be provided in the vicinity of the footrest 18 on the side opposite to the drive adjustment pedal 20.
(6) Use an electric motor instead of the engine 8 as a prime mover. In this case, the electric motor can be turned on / off by the drive adjustment pedal 20.
(7) The width of the airframe 4 should be adjustable according to the width of the kite.
(8) The arrangement position of the drive adjusting pedal 20 and the footrest 18 can be adjusted according to the physique of the worker.
(9) The front and rear, left and right positions of the seat 5 should be adjustable.
(10) The seat 5 is provided so that the worker faces the side of the machine body, and the work is performed on the fence U next to the fence U on which the agricultural work vehicle 1 travels.
(11) The front wheel 2 and the rear wheel 3 are configured to be driven.
(12) Only one set of the eaves guide roller 9 is provided in front of the front wheel 2 or between the front wheel 2 and the rear wheel 3.

1 is a side view of a farm vehicle according to a first embodiment that embodies the present invention. It is a top view of the farm work vehicle. It is a front view of the farm work vehicle. It is a rear view of the agricultural work vehicle. FIG. 3 is a view taken in the direction of arrow V in FIG. 2. It is a top view of the conventional agricultural work vehicle. It is a side view of the agricultural working vehicle which concerns on 2nd embodiment which actualized this invention. It is a top view of the farm work vehicle. It is a side view which shows the state which folded the agricultural work vehicle. It is a side view of the joint part and fixed part of the agricultural work vehicle. It is a figure which shows the example of a change of the joint part and fixed part of the farm work vehicle, (a) is a partially broken plan view, (b) is a partially broken side view. It is a side view of the agricultural working vehicle which concerns on 3rd embodiment which actualized this invention. It is a top view of the farm work vehicle. It is a front view of the farm work vehicle. It is a side view of the agricultural work vehicle with the swivel stand in a supported state. It is an enlarged view of the turning stand. It is a rear view of the farm work vehicle which shows the turning method of the farm work vehicle. It is a top view of the farm work vehicle which shows the turning method of the farm work vehicle. It is a top view of the agricultural working vehicle which concerns on 4th embodiment which actualized this invention. It is a partially broken front view of the farm work vehicle. It is a figure which shows the support part of the guide roller in the front right side of the agricultural working vehicle, (a) is a top view, (b) is a front view. It is a figure which shows the support piece of the seedling stand in the front right side of the agricultural working vehicle, (a) is a left sectional view, (b) is a bottom view. It is a figure which shows the reserve seedling case support part of the agricultural work vehicle, (a) is a top view, (b) is a left view. It is a figure which shows the turning stand of the left side of the agricultural farm vehicle, (a) is a side view, (b) is a partially broken plan view, (c) is a rear view. It is sectional drawing which shows the rear wheel of the agricultural work vehicle. It is a figure which shows the member which comprises the same rear wheel, (a) is a top view of a sprocket seat, (b) is a top view of a sprocket, (c) is a top view of a fixing | fixed part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Agricultural work vehicle 2 Front wheel 3 Rear wheel 4 Airframe 5 Seat 7 Drive part 9 畝 Guide roller 15 Turning handle 18 Foot rest 50 Agricultural work vehicle 51 Aircraft 52 Joint part 53 Fixing part 101 Agricultural work car 102 Turning stand 103 Grounding part 104 Support part 109 Spring member 111 Spherical bearing 131 Agricultural work vehicle 132 Turning handle 133 Turning handle 134 畝 Guide roller 135 Support portion 136 Support piece 137 Spare seedling case support portion 138 Rotating stand 139 Rear wheel Sa Support state Sb Retracted state U 畝

Claims (11)

An airframe that is supported by the left and right front wheels and the left and right rear wheels arranged so as to straddle the heel so as to be able to travel in the front-rear direction, which is the heel length direction, and a drive unit that drives the front wheels and / or the rear wheels. A farm vehicle equipped with,
A farm work vehicle provided with a pair of a pair of fence guide rollers disposed on both sides of the fence so that the peripheral surface is in contact with the side face of the fence and rolls as the machine body advances. An airframe that is supported by the left and right front wheels and the left and right rear wheels arranged so as to straddle the heel so as to be able to travel in the front-rear direction, which is the heel length direction, and a drive unit that drives the front wheels and / or the rear wheels. A farm vehicle equipped with,
A farm work vehicle provided with at least two pairs of paired guide guide rollers respectively disposed on both sides of the basket so that the peripheral surface is in contact with the side of the basket and rolls as the machine body advances.   The agricultural work vehicle according to claim 1 or 2, wherein one set of the heel guide rollers is provided in front of the front wheel.   The agricultural work vehicle according to claim 2, wherein one set of the heel guide rollers is provided in front of the front wheel, and another set is provided between the front wheel and the rear wheel.   The said airframe is provided with the joint part provided in the longitudinal direction approximate center of this airframe, and the fixing | fixed part for fixing this joint part in the state which extended the said airframe in the state extended. The agricultural vehicle as described in any one of 1-4.   A grounding portion that contacts the ground; and a support portion that supports the aircraft relative to the grounding portion, and the aircraft can be turned on the ground in a state where the front wheels and / or the rear wheels are floated from the ground. The agricultural work vehicle according to any one of claims 1 to 5, wherein swivel stands to be supported are provided on both left and right sides of the machine body.   The swivel stand is provided so as to be movable between a support state in which the grounding unit contacts the ground and supports the aircraft, and a retreat state in which the grounding unit separates from the ground and does not support the aircraft. The agricultural work vehicle according to claim 6, further comprising state holding means for selectively holding the support state or the retracted state.   The agricultural work vehicle according to claim 7, wherein the swivel stand is supported by the machine body so as to be rotatable about a base end side of the support portion between the support state and the retracted state.   The agricultural work vehicle according to any one of claims 6 to 8, wherein the swivel stand is configured such that the grounding portion contacts the ground substantially directly below the front wheel or the rear wheel.   The farm work vehicle according to any one of claims 6 to 9, wherein the swivel stand has the grounding portion rotatably attached to the support portion.   The farm work vehicle according to any one of claims 6 to 9, wherein the swivel stand is configured so that the grounding portion is grounded so as to be rotatable with respect to the ground.

Images