JP2007117018A - Operation structure of harvesting working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve riding comfortability without causing enlargement of a vehicle body. <P>SOLUTION: In an operation structure of a harvesting and working vehicle in which an operation lever 43 for hydraulic operation is provided on an operation panel 42 arranged in a standing condition in a riding and driving part 3, a control valve 69 operated by the operation lever 43 is installed at a position lower than a riding step 50 in the riding and driving part 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an operation structure for a harvesting work vehicle in which an operation lever for hydraulic operation is mounted on a control panel standing on a boarding operation unit.

As the operation structure of the harvesting work vehicle as described above, a control box (control panel) is erected on the step part on the front side of the seat, and is used for steering and cutting up and down at the right side of the control panel on the top of the control box. There is one in which a control lever configured to be capable of a cross swing operation is erected (see, for example, Patent Document 1).
JP 11-46561 A (paragraph number 0015, FIGS. 1 and 2)

  In the operation structure of the harvesting work vehicle in the above-described prior art, the control box is formed in a hollow control box and the control lever for lifting and lowering the cutting lever is configured to be capable of swinging in the cross in the inner space. In general, the control lever for the control lever and the control valve for lifting and lowering are linked to each other by a link mechanism. It is necessary to form a large thickness dimension in the front-rear direction so that the interior of the fulcrum part, the control valve for lifting and lowering the cutting mechanism, and the link mechanism can be made. The boarding space between the two was narrowed, leading to a decrease in comfort.

  In addition, if the boarding space between the control box and the driver's seat in the boarding operation section is widened to ensure good living comfort, the boarding operation section will protrude to the front of the vehicle body, and the harvesting device will be installed. Left-right direction when configured for full-cutting specifications that overlap with the driving part in front view, or in the swivel cutting work position that does not overlap with the boarding driving part and front view, and the middle work position that overlaps with the boarding driving part in front view In the case where the position can be changed, it is necessary to arrange the harvesting device at a position on the front side of the vehicle body that does not come into contact with the boarding operation part that projects to the front of the vehicle body, which leads to an increase in the size of the entire vehicle body. .

  An object of the present invention is to improve comfortability without causing an increase in the size of a vehicle body.

  In the invention according to claim 1 of the present invention, in the operation structure of the harvesting work vehicle in which an operation lever for hydraulic operation is provided on an operation panel standing on the boarding operation section, the operation is operated by the operation lever. A control valve is arranged at a position below the boarding step in the boarding operation section.

  According to this configuration, since it is not necessary to incorporate a control valve in the control panel, the size in the thickness direction of the control panel can be reduced correspondingly. ) And the width (right and left) (when the control panel is a side panel) is long, and a wide boarding space in the boarding operation section can be secured.

  By the way, in the harvesting work vehicle, an engine is mounted at a position below a driver's seat arranged above the boarding step, and a hydraulic pump that pumps hydraulic oil to the control valve by driving with the engine power is installed in the engine. In general, when the control valve is installed at a position below the boarding step, the control valve is provided between an operation lever provided on the control panel and a hydraulic pump directly attached to the engine. As a result, the hydraulic piping from the hydraulic pump to the control valve can be shortened compared to the case where the control valve is built in the control panel, and the effort required to route and fix the hydraulic piping can be reduced. Can be reduced.

  Therefore, it is possible to improve the comfort in the boarding operation section without causing an increase in the size of the vehicle body, and it is possible to reduce labor and simplify the configuration of the hydraulic piping.

  According to a second aspect of the present invention, in the first aspect of the present invention, the operation lever and the control valve are linked by an operation wire passing through an internal space of the control panel.

  According to this configuration, since the operation lever and the control valve are linked by the operation wire, the dimension in the thickness direction of the control panel can be further reduced as compared with the case where the linkage is performed by the link mechanism. Thus, it is possible to secure a wider boarding space in the boarding operation section without incurring the disadvantage of increasing the overall length and the lateral width of the vehicle body.

  In addition, even if the control valve is deployed below the boarding step, which is farther from the control lever than when it is deployed inside the control panel, the configuration is complicated when linked with the link mechanism, and operations such as play between links are performed. In addition, since the position below the boarding step is relatively close to the operation lever, it is possible to avoid a decrease in operability due to an increase in the wire length.

  Therefore, the structure can be simplified and the operability can be improved while further improving the comfort in the boarding operation section.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the control valve causes the hydraulic oil to flow with respect to a single-acting lift cylinder that lifts and lowers the harvesting device hydraulically. A lift valve that controls the operation of a hydraulic pump that is supplied via the lift valve when the lift valve is switched to a lowered state in a supply / discharge oil passage extending between the lift valve and the lift cylinder. It is equipped with a pilot operated check valve that is opened with oil.

  According to this configuration, since the load when the harvesting device is suspended is applied to the check valve without being applied to the lift valve, the load when the harvesting device is suspended is applied to the lift valve. Compared to such a case, the operation switching operation of the lift valve by manual operation of the operation lever can be easily performed, and thereby the overall length of the operation lever can be shortened, and accordingly, the entire operation lever Can be deployed in a state of being close to the upper side of the control panel, and the vertical length on the swing fulcrum side of the operation lever built in the control panel can be shortened. The thickness dimension can be made smaller, and the boarding space in the boarding operation section can be secured more widely.

  Accordingly, it is possible to further improve the comfort in the boarding operation part while improving the operability when raising and lowering the harvesting device.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the control panel is equipped with a headlamp.

  According to this configuration, the empty area below the control lever on the control panel can be used effectively for the headlamp arrangement area, so that the position just before the swing fulcrum side of the control lever built in the control panel Thus, it is possible to avoid the inconvenience that the size in the thickness direction of the control panel is increased and the inconvenience that the operation lever and the headlamp are not easily assembled and maintained.

  Therefore, the driving performance and workability at night can be improved by equipping the headlights without reducing the comfort in the boarding operation section, or the ease of assembly and maintenance of the control lever and headlights. Improvements can be made.

  FIG. 1 shows the entire right side of a three-row harvesting combine which is an example of a harvesting work vehicle for harvesting harvested crops such as paddy rice and wheat, and FIG. 2 shows the entire plane. The combine is provided with a pair of left and right crawler type traveling devices 2 at the lower part of the body frame 1 formed of a square pipe or the like, and forms a boarding operation unit 3 on the upper right side of the front part of the body frame 1. On the left side, a cutting and conveying device (an example of a harvesting device) 4 having a three-row cutting specification, which is an example of a harvesting device, is connected so that an up-and-down swinging operation can be performed around a swinging fulcrum P1 set at the upper part. Equip and receive the harvested cereal rice cake from the harvesting and conveying device 4 in the substantially left half of the body frame 1 and perform threshing treatment on the tip side, and processed products such as grains obtained by the threshing treatment Equipped with a threshing device 5 that performs a sorting process on A grain tank 6 for storing the grains obtained by the threshing / sorting process in the threshing device 5 is mounted on the substantially right half of the body frame 1, and the grain after the threshing processing from the threshing device 5 is mounted on the rear part of the threshing device 5. The waste straw as a straw is received, and the waste straw is left as a long straw or is shredded and connected to a waste straw treatment device 7 that is discharged to the outside of the machine, and the grains stored in the glen tank 6 are discharged outside the machine. It is equipped with a grain discharging device 8 that makes it possible.

  As shown in FIGS. 1 to 12, the body frame 1 is mounted with an anti-vibration engine 9 in the rear half of the boarding operation part forming area secured at the right front part thereof, and at the front end part on the left side thereof for connecting the cutting and conveying device. The support frame 10 is erected.

  The support frame 10 is a support base 11 installed upright on the vehicle body frame 1 so as to be positioned above the left and right central portions of the left crawler type traveling device 2, and the support base 11 is rotated relative to the support base 11 around the swing fulcrum P 2. The support column 12 supported so as to be movable, the support bracket 13 installed upright on the vehicle body frame 1 so as to be adjacent to the boarding operation unit 3, and the reinforcement installed over the support base 11 and the support bracket 13 The member 14 is provided.

  The harvesting and transporting device 4 transfers the planted culm to be harvested to the harvesting frame 15 that is also used as a transmission case and supported by the support 12 and the support bracket 13 so as to swing up and down around the pivot point P1. Four dividers 16 that divide and raise each planting row, three pulling devices 17 that cause the rowed planted culm to a predetermined cutting posture, and a clipper type that cuts off the planted side of the planted culm A culm transporting device 19 that transports the chopped cereal culm that is the planted cereal culm after cutting to the threshing device 5 while changing the posture from the standing posture for slicing to the sideways tilting posture for threshing, Etc., and swings up and down around the swinging fulcrum P1 by the expansion and contraction operation of the lifting cylinder 20 installed over the body frame 1 and the cutting frame 15.

  That is, the lifting operation of the cutting and conveying device 4 by the expansion and contraction operation of the lifting and lowering cylinder 20 changes the ground height between the working height position and the non-working height position of the cutting and conveying device 4, and the cutting height with respect to the planted culm You can make adjustments.

  The lifting cylinder 20 employs a single-acting hydraulic cylinder that raises the cutting and conveying device 4 by an extension operation by supplying hydraulic oil and lowers the cutting and conveying device 4 by a contracting operation by discharging hydraulic oil.

  The mowing frame 15 has left and right fulcrum frame portions 15A centered on the swing fulcrum P1, the front and rear frame portions 15B extending from the right end portion of the fulcrum frame portion 15A toward the front and lower sides, and the front ends of the front and rear frame portions 15B. The left and right power distribution frame portion 15C is connected, the vertical frame portion 15D extends upward from the power distribution frame portion 15C, and the power distribution frame portion 15C extends forward. And a fork-shaped weed frame portion 15E in plan view. The left end portion of the fulcrum frame portion 15A is received and supported by the support column 12, and the right end portion of the fulcrum frame portion 15A is received and supported by the support bracket 13. Yes.

  The fulcrum frame portion 15A has a left-right input shaft 22 to which power from the engine 9 is transmitted via a belt tension type cutting clutch 21 or the like (see FIGS. 7, 10 and 11), An output shaft 23 and the like for supplying the motive power to the cereal conveying device 19 are incorporated (see FIGS. 8 and 9), and the front and rear frame portion 15B is interlocked with the input shaft 22 via a pair of bevel gears (not shown). A connected front and rear relay shaft 24 is fitted (see FIGS. 5 and 12), and a power distribution mechanism (not shown) distributes power from the relay shaft 24 to the reaping device 18 and the like in the power distribution frame portion 15C. And the like, and a transmission shaft (not shown) for supplying the distribution power from the power distribution mechanism to the pulling device 17 and the like is included in the vertical frame portion 15D.

  The cutting frame 15 is connected to the front and rear frame portions 15B of the piston rod 20A of the elevating cylinder 20 via a connecting pin 25. The cutting frame 15 is engaged with a locking rod 25A provided on the connecting pin 25. Accordingly, a retaining piece 15F is provided that prevents the connecting pin 25 from coming off and maintains the connected state between the front and rear frame portions 15B and the piston rod 20A by the connecting pin 25 (see FIGS. 11 and 12).

  A first fixing fitting 26 that fixes the left end portion of the fulcrum frame portion 15 </ b> A so as to be relatively rotatable is bolted to the column 12, and a holding tool 27 that enables the cutting and conveying device 4 to be floated is provided. Yes. The holder 27 is a swinging operation using the left and right support shaft 27B of the operation portion 27A as a fulcrum, and the holding block 27C is moved between the placement portion 12a of the support column 12 and the placement portion 15a of the fulcrum frame portion 15A. It is configured to be displaced to a holding release position that is out of the range, and to a floating holding position that is located between the placement portion 12a of the support column 12 and the placement portion 15a of the fulcrum frame portion 15A [FIG. See FIG. 6 and FIGS.

  The support bracket 13 is provided with a second fixing fitting 28 for fixing the left end portion of the fulcrum frame portion 15A so as to be relatively rotatable, and can be opened and closed with a left and right support shaft 29 as a fulcrum. In addition, a fixing pin 30 is mounted so as to be detachable (see FIGS. 2, 3, 5, and 7 to 9).

  From this configuration, after the cutting and conveying device 4 is greatly lifted and the holding block 27C of the holder 27 is displaced from the holding release position to the floating holding position, when the cutting and conveying device 4 is lowered, the mounting portion of the column 12 is placed. Since the placement portion 15a of the fulcrum frame portion 15A is placed on the holding block 27C placed on 12a, the cutting and conveying device 4 is levitated and held at a height position near the ground. In this floating state, after removing the transmission belt 21B from the output pulley 21A of the reaping clutch 21 that is integrated with the input shaft 22, the engagement between the locking rod 25A of the connecting pin 25 and the retaining piece 15F is released, The connection pin 25 is removed, the connection between the front and rear frame portion 15B and the piston rod 20A by the connection pin 25 is released, and the fixing pin 30 is removed and the supporting pin 30 is supported by the fixing pin 30. The cutting and conveying device 4 is adjacent to the boarding operation unit 3 by releasing the fixed holding of the second fixing bracket 28 from the closed position to the ket 13 and swinging the second fixing bracket 28 from the closed position to the open position. Thus, it is possible to relatively easily perform an artificial rocking operation in the left-right direction around the rocking fulcrum P2 from the working position to the maintenance position away from the boarding operation unit 3 to the left outer side of the vehicle body.

  Then, by positioning the cutting and conveying device 4 at the maintenance position, maintenance for the cutting device 18 and the cereal conveying device 19 can be performed from the right side or the rear of the cutting and conveying device 4, and the boarding operation unit 3. Maintenance of an operation system (not shown), a transmission system (not shown) and the like provided between the cutting and conveying device 4 can be facilitated, and as a result, maintenance can be improved.

  A locking pin 31 that is dropped and inserted into a locking hole 11a drilled at a predetermined position of the support base 11 when the cutting and conveying device 4 reaches the maintenance position is inserted into and removed from the support 12 in the vertical direction. Thus, during the maintenance work in which the cutting and conveying apparatus 4 is swung to the maintenance position, the cutting and conveying apparatus 4 can be held at the maintenance position [FIGS. 5, 6, and 8]. And FIG. 9].

  As shown in FIGS. 2 to 4, the weeding frame portion 15 </ b> E of the cutting frame 15 is such that the tip of the divider 16 provided at the left end portion is on the outer side of the vehicle body from the left end position of the left crawler type traveling device 2. And the tip of the divider 16 mounted on the right end portion thereof is located at substantially the same position (may be the same position) as the right end position of the crawler type traveling device 2 on the right side in the left-right direction of the vehicle body. Furthermore, it is formed wide in the left-right direction of the vehicle body.

  In other words, the cutting and conveying apparatus 4 is involved in a rotary cutting operation in which an already cut area is positioned on the right side and an uncut area is positioned on the left side, and a split operation in which the uncut area is positioned on both left and right sides. The left and right crawler type traveling devices 2 are configured to have a full-cutting specification that allows harvesting work without incurring the falling down of the planted cereal.

  As shown in FIGS. 1 to 3 and FIG. 13, the lower end portion of each divider 16 is equipped with a front and rear connecting rod 16 </ b> A that is inserted and connected to the tip of the weed frame portion 15 </ b> E. Among them, the connecting rod 16A located at the left and right ends and the connecting rod 16A located at the center left side are welded with a sheet metal grounding body 16B formed in a boat shape extending downward from the weeding frame portion 15E. Has been.

  Each grounding body 16B is in contact with the entire grounding area provided on the bottom surface thereof in a predetermined grounding posture of the cutting and transporting device 4 obtained when the cutting and transporting device 4 is lowered to a preset grounding work height position. Equipped as set up.

  As shown in FIGS. 1, 11, and 13 to 15, the front and rear frame portions 15 </ b> B of the cutting frame 15 are mounted on the front portion of the body frame 1 when the cutting conveyance device 4 is lowered to the working height region. In the grounding state of the cutting and conveying device 4, the cutting and conveying device 4 is urged in the upward direction so that each grounding body 16B is grounded with a relatively small ground pressure set in advance. As a result, the tip of each divider 16 or the grounding body 16B rides on a raised object or the like in the working state in which the cutting and conveying device 4 is lowered to the working height region. In the case of the state, while the grounding reaction force at that time exceeds the grounding pressure of the cutting and conveying device 4 reduced by the urging of the ascending urging mechanism 33, the ascending urging mechanism 33 is raised or the like. Will go up and down along

  That is, even if the height position of each divider 16 is set to be lower in order to make it possible to raise and cause the fallen cereals and the like, the dividers 16 may plung into a hard bulge or the like. In addition, even at the start of the work of harvesting the planted cereal while descending into the field, it is possible to avoid the risk that each divider 16 rushes into the field and As a result, it becomes possible to mow from a position close to the ground, and as a result, the workability for the overturned culm is improved and the workability for easily performing good mowing from the start of the work can be improved.

  In particular, in this configuration, if the operation is performed with the cutting and conveying device 4 slightly lifted from the ground, the possibility that each divider 16 may rush into the field can be more effectively avoided.

  And, by combining this configuration with the mowing and conveying device 4 with a full-cutting specification, for example, it is difficult to visually recognize the state of the work ground, the striations, etc., as in the case of middle split work or work where the fall of the cereal is severe. Even if it is a case, from the position with respect to the planted cereal of the field, without causing the inconvenience that each divider 16 plunges into the field and the inconvenience of stepping over the planted cereal with the crawler type traveling device 2, In addition, the harvesting operation can be performed satisfactorily in any direction, and the workability can be effectively improved.

  Incidentally, when the cutting and conveying apparatus 4 moves up and down due to the ground reaction force, the lifting cylinder 20 expands and contracts due to precipitation and dissolution of air that is always dissolved in the hydraulic oil.

  The upward biasing mechanism 33 is capable of adjusting the distance between a pair of spring receiving members 34 and 35 disposed opposite to each other so that the interval can be changed, a pair of left and right coil springs 36 interposed therebetween, and a pair of spring receiving members 34 and 35. And a pair of left and right support rods 37, and a rubber mudguard cover 38 wound around the left and right coil springs 36, and the like. The base 39 and a pair of left and right support rods 40 extending from the upper part of the support base 39 in a front-upward cantilever posture are detachably mounted in a front-upward cantilever posture.

  From this configuration, it is natural to equip the upper portion of the upward biasing mechanism 33 with the shim 41 and to change the thickness and the number of the shim 41. It is possible to interpose the shim 41 between them, and to change the thickness and number of shims 41 to be intervened, so that the urging force against the change in the weight of the cutting and conveying device 4 due to additional equipment of optional equipment, etc. The adjustment of the urging force of the mechanism 33 can be easily dealt with by installing a shim 41 on the upper part of the ascending urging mechanism 33, or changing the thickness and number of the shim 41. Variations in the urging force of the ascending urging mechanism 33 due to individual differences include interposing a shim 41 between the ascending urging mechanism 33 and the support base 39, and changing the thickness and number of shims 41 to be intervened. Easy It has to be able to cope.

  By the way, when the cutting and conveying apparatus 4 is lifted and held by the holder 27, the contact member 32 of the cutting frame 15 is separated from the ascending biasing mechanism 33, so that the working position of the cutting and conveying apparatus 4 is increased. The horizontal swing operation over the maintenance position can be performed satisfactorily without being affected by the upward biasing mechanism 33.

  As shown in FIGS. 1 to 4, the boarding operation unit 3 is provided with a cross swing-type neutral return type control lever (operation) on a front panel (an example of a control panel) 42 erected on the right front end of the body frame 1. An example of a lever) 43, a display panel 44, and the like are provided, and a main transmission lever 46, a sub transmission lever 47, and the like are provided on a side panel 45 erected on the vehicle body frame 1 so as to separate the boarding operation unit 3 and the cutting and conveying device 4. A driver's seat 49 is connected to the upper end of the engine hood 48 mounted on the body frame 1 so as to cover the engine 9, and a boarding step 50 is laid between the front panel 42 and the engine hood 48. Has been.

  As shown in FIGS. 1 to 4 and FIGS. 16 to 20, the front panel 42 is a front frame that forms a front surface thereof on a substantially inverted U-shaped handle frame 51 that is erected on the right front end of the vehicle body frame 1. A cover 52, a rear cover 53 that forms the back surface thereof, a top cover 54 that forms the top surface thereof, and the like are provided, and the front surface is formed in a hollow shape having a substantially arc shape when viewed from the side. A display panel 44 is provided on the left side adjacent to the device 4, and a control lever 43 is provided on the right side of the top cover 54 away from the cutting and conveying device 4.

  The control lever 43 swings left and right with the bracket 55 fixed to the handle frame 51, the first support shaft 56, the first locking pin 57, and the first support shaft 56 extending forward from the bracket 55 as fulcrums. The left and right rocking plate 58 that moves, the first engaging pin 59 that is mounted on the lower part of the left and right rocking plate 58, the first support pin 56, and the first locking pin 57 and the first A first torsion spring 60 and a second torsion spring 61 that engage with the engagement pin 59, a second support shaft 62 and a second locking pin 63 that extend leftward from the left and right swing plate 58, and a second A front / rear swing plate 64 that swings back and forth with the two support shafts 58 as a fulcrum, a second engagement pin 65 that is mounted on the lower side of the front / rear swing plate 64, and a second support shaft 62 are externally mounted. And the second engaging pin 63 and the second engaging pin 65 engaged with the second engaging pin 65 Torsion spring 66, and is constituted by front and rear swing plate 64 steering rod 67 which extends so as to be integrally swung upward, and the like.

  The left and right rocking plate 58 includes a side clutch / brake (not shown) built in the transmission case and a left and right crawler to switch the transmission state and adjust the braking force with respect to the corresponding left and right crawler type traveling devices 2. A steering valve (not shown) comprising a control valve for controlling the flow of hydraulic oil with respect to a turning assist clutch (not shown) built in the transmission case so as to adjust the transmission between the traveling devices 2. Operation is linked through a push-pull wire (an example of an operation wire) 68 that passes through the internal space of the front panel 42.

  The first torsion spring 60 acts on the first engagement pin 59 to urge the control rod 67 back to the neutral position in the left-right swing direction via the left-right swing plate 58 and the front-rear swing plate 64. The second torsion spring 61 acts on the first engagement pin 59 to bring the control rod 67 within a predetermined operation range on the neutral position side in the left-right swing direction via the left-right swing plate 58 and the front-rear swing plate 64. Energize return.

  The front / rear swing plate 64 is linked to a lift valve 69 that is a control valve that controls the flow of hydraulic oil to the lift cylinder 20 via a push-pull wire (an example of an operation wire) 70 that passes through the internal space of the front panel 42. Has been. The elevating valve 69 is provided with a “neutral” position for stopping raising / lowering, a “rising 1” position for raising a low speed, a “rising 2” position for normal raising, and a “falling” position for lowering.

  The third torsion spring 66 acts on the second engagement pin 65 to urge the control rod 67 to return to the neutral position in the forward / backward swing direction via the forward / backward swing plate 64.

  From this configuration, when the control lever 43 is swung left and right, the left and right side clutches and brakes are switched to the non-braking state with transmission by the hydraulic control of the steering valve based on the operation, and the turning assist clutch is A straight-running state that is switched to the transmission state, or a slow-turning state in which one of the left and right side clutches and brakes is switched to the non-braking state where transmission is cut off, and the turning auxiliary clutch is switched to the semi-transmission state (half-clutch state) Swing operation from the neutral position of the control lever 43 in the left-right direction over the sudden turning state in which either the left or right side clutch / brake is switched to the transmission-cut braking state and the turning auxiliary clutch is switched to the non-transmission state. A turning state corresponding to the amount can be revealed.

  For example, if the predetermined operation range on the neutral position side in the left-right swing direction in which the control lever 43 is restored by the action of the second torsion spring 61 is a slow turning region in which the side clutch / brake does not act as a brake, the control lever 43 In other words, when the control lever 43 swings in the left / right direction, the side clutch / brake brakes when the side clutch / brake brakes slowly. It becomes possible to easily grasp the switching from the acting sudden turning state.

  On the other hand, when the control lever 43 is swung in the front-rear direction, by the hydraulic control of the elevating valve 69 based on the operation, the elevating cylinder 20 is extended at a low speed to raise the cutting and conveying device 4, and the elevating cylinder 20 In the ascending operation state where the cutting and conveying device 4 is lifted by extending at a normal speed, the lowering operation state where the lifting and lowering cylinder 20 is contracted at the normal speed and the cutting and conveying device 4 is lowered, and the expansion and contraction of the lifting cylinder 20 is prevented. A lifting / lowering stop state in which the cutting and conveying device 4 is lifted and stopped can be revealed.

  In other words, the cutting and conveying device 4 can be raised at a low speed by the operation of the control lever 43. Also, when the cutting and conveying device 4 is in the lowering operation state, the cutting and conveying device 4 is operated by the action of the upward biasing mechanism 33 described above. Since the descending speed when descending to the height region is reduced, the height adjustment operation in the work height region of the cutting and conveying apparatus 4 is facilitated.

  As shown in FIG. 13, the lift valve 69 is supplied with hydraulic oil from a gear pump (an example of a hydraulic pump) 71 directly attached to the engine 9 so as to be driven by engine power. In addition to the flow rate adjusting valve 73 and the speed control valve 74 for setting the descending speed, the supply / exhaust oil passage 72 extending to 20 is supplied via the raising / lowering valve 69 when the raising / lowering valve 69 is switched to the lowered state. A pilot operated check valve 75 that is opened by hydraulic oil from the gear pump 71 is interposed.

  In other words, the pilot-operated check valve 75 is interposed in the supply / discharge oil passage 72, so that the load when the cutting and conveying apparatus 4 is suspended is not applied to the lift valve 69 but the check valve 75. Therefore, the operation switching operation of the lift valve 69 by the manual operation of the control lever 43 can be performed more easily than in the case where the load when the cutting and conveying apparatus 4 is suspended is applied to the lift valve 69. .

  The elevating valve 69 is arranged below the boarding step 50 in a united state as an elevating hydraulic unit 76 together with the flow rate adjusting valve 73, the speed control valve 74, and the check valve 75.

  That is, in the state where the lift valve 69 and the like are unitized as the hydraulic unit 76, the lift valve 69 and the flow rate adjustment valve are arranged near the gear pump 71 directly attached to the engine 9 positioned below the driver seat 49. It is not necessary to perform individual piping for 73 and the like, and the length of the supply oil passage 77 extending from the gear pump 71 to the hydraulic unit 76 is shortened, so that the labor required for routing and fixing of the hydraulic piping can be reduced. The configuration of the hydraulic piping structure can be simplified.

  Further, as described above, since the control lever 43 and the lift valve 69 are linked by the push-pull wire 70, even if the lift valve 69 is arranged below the boarding step 50, it is generated when linked by the link mechanism. There is no complication of the configuration or deterioration of operability due to looseness between links, and the lower position of the boarding step 50 is a position relatively close to the control lever 43. It is possible to avoid a decrease in operability due to the lengthening.

  As shown in FIGS. 1 to 3, 16, 17, and 21, the push-pull wire 70 that links the control lever 43 and the lift valve 69 is a travel clutch provided at the right front end of the boarding step 50. In order to avoid interference with the pedal 78, the arm portion 78A of the clutch pedal 78 is arranged in parallel in the left-right direction at a predetermined interval.

  The clutch pedal 78 is integrally equipped with an operation lever 79 that enables the operation of the clutch pedal 78 from the left-front-side vehicle getting-off position, so that the travel clutch (not shown) can be turned on and off even from the getting-off position. Start and stop by operation.

  As shown in FIGS. 1 to 4, 16, and 17, the front panel 42 is formed such that a right side portion that is a lower portion of the control lever 43 in the front cover 52 and the top cover 54 bulges forward. The right side part away from the cutting and conveying device 4 has a bulging portion 42A that expands the internal space of the part. A swing fulcrum 43A of the control lever 43 that is bulky by being configured as a neutral return type is internally provided.

  On the lower side of the bulging portion 42A of the front panel 42, a two-lamp type headlamp 82 formed in an oblong shape in front view with two halogen bulbs 80, 81 on the top and bottom is connected to the cutting and conveying device 4. Even when it is raised to the height region for traveling, the upper halogen bulb 80 is located at a height position that is not covered by the divider 16 or the like located at the right end of the cutting and conveying device 4 in a front view. In addition, the lower halogen bulb 81 is in a right-tilt posture in which the lower halogen bulb 81 is closer to the cutting and conveying device 4 than the upper halogen bulb 80, and the lower halogen bulb 80 is on the front side of the vehicle body with respect to the upper halogen bulb 81. Furthermore, it is arrange | positioned so that it may bulge ahead from the front end of the front panel 42 so that it may be located in.

  Each of the upper and lower halogen bulbs 80 and 81 has a plurality of reflecting elements 83A and 84A provided in the corresponding multi-reflectors 83 and 84, and diffused irradiation to a predetermined range in front of the vehicle (right front of the vehicle body) and left front (vehicle body). It is configured to perform diffused irradiation to a predetermined range (front left) and diffused irradiation to a predetermined range in the lower front (lower front of the vehicle body) [see FIGS. 1 and 2].

  The lower halogen bulb 81 is used when the cutting and conveying device 4 is used for traveling when the upper and lower halogen bulbs 80 and 81 are turned on by operating a blinking changeover switch (not shown) provided in the boarding operation unit 3. When it is raised to the height region, it is automatically turned off by the operation of a normally closed switch (not shown) that is opened when the cutting and conveying device 4 reaches the height region for traveling. In addition, when the cutting and conveying apparatus 4 is lowered from the moving travel height region by the lowering operation, it is configured to automatically turn on by the operation of the normally closed switch.

  In other words, the headlamp 82 is configured such that the upper halogen bulb 80 functions for traveling and the lower halogen bulb 81 functions for work. The lower halogen bulb 81 where the light is partially blocked by the cutting and transporting device 4 that has been lifted up to the height region and the illumination is uneven is turned off, and the cutting and transport that has been lifted to the height region for moving travel Since only the upper halogen bulb 80 that is difficult to block light by the device 4 is lit, wide-angle illumination by far-distance illumination to the front of the vehicle body with enhanced irradiation on the traveling road surface in front of the vehicle body is height for traveling. The cutting and transporting device 4 that has been lifted up to the area can be uniformly performed without being largely obstructed. As a result, each divider 1 provided on the traveling road surface in front of the vehicle body or on the front end of the cutting and transporting device 4 Visibility is improved with respect to such movement driving at night is facilitated.

  When working at night, the lower halogen bulb 81 is used while performing wide-angle illumination by the far-end illumination to the front of the vehicle body with the light from the upper halogen bulb 80 being enhanced by the light from the upper halogen bulb 80. The light emitted from the front and the vicinity of the front of the vehicle body with enhanced irradiation to the tip of each divider 16 and the vicinity thereof are irradiated to the front of the vehicle body. It becomes easier to grasp the positional relationship with the planted cereal, and as a result, it becomes easier to align each divider 16 with respect to the planted culm to be harvested, improving night workability. To do.

  Further, when cereal clogging occurs in the harvesting and transporting device 4 during operation at night, the working position and the maintenance position of the harvesting and transporting device 4 are determined by the light distribution to the left front of the vehicle body by the headlamp 82. As a result, it is possible to easily perform the left / right swinging operation around the swinging fulcrum P2 and to easily remove the clogged cereals from the cutting and conveying device 4 located at the maintenance position. Appropriate maintenance work for cereal clogging or the like in the reaping and conveying apparatus 4 that has a fear of being easily performed can be performed.

  Instead of the configuration in which the lower halogen bulb 81 blinks in conjunction with the lifting / lowering operation of the cutting and conveying device 4, a dedicated blinking switch for the upper and lower halogen bulbs 80, 81 is provided, so You may make it perform blinking of the lower halogen bulb 81 according to work driving | running | working by manual operation.

  As shown in FIGS. 16 and 17, the front cover 52 is detachably connected to the handle frame 51 by left and right bolts 85 with knobs, and push-pull wires 68 and 70 connected to the control lever 43 extend. When adjusting the lamp or replacing the halogen bulbs 80 and 81 of the headlamp 82, the front cover 52 can be removed by operating the left and right knob bolts 85, so that the rear cover 53 is positioned. The push-pull wires 68 and 70 to be adjusted and the halogen bulbs 80 and 81 located on the front cover 52 side can be easily changed from the wide open space obtained by removing the front cover 52. As a result, It is possible to improve the maintainability of each device and each component provided in the internal space of the front panel 42.

  As described above, the hydraulic unit 76 including the lift valve 69 is disposed below the boarding step 50, and the operation lever 43 and the steering valve and the lift valve 69 are linked by the push-pull wires 68 and 70. As a result, the interior space of the front panel 42 is internally provided with a swing fulcrum 43A of the control lever 43 that becomes bulky by being configured as a cross swing neutral return type. Compared to the case where the control lever 43 and the lift valve 69 are linked by a link mechanism, the link between the control lever 43 and the lift valve 69 is facilitated by the link mechanism while the illumination lamp 82 is provided. Therefore, compared with the case where the lift valve 69 is provided in the internal space of the front panel 42, the front panel 42 is made as narrow as possible in its internal space, particularly in the lower internal space on the foot side. It could be formed having a small thickness in the longitudinal direction and, in turn, thereby improving the comfort to be able to secure a wide foot space in the driver's section 3.

  In addition, as described above, the load when the cutting and conveying apparatus 4 is suspended is applied to the pilot-operated check valve 75, and the operation switching of the lift valve 69 by the manual operation of the control lever 43 is performed. Since the operation can be performed lightly, the length from the second support shaft 62 to the upper end of the control rod 67 in the control lever 43 can be shortened. Assembling of the control lever 43 and the headlamp 82 can be performed in a state of being closer to the upper side, and polymerization in the vertical direction with the headlamp 82 disposed below the headlamp 82 can be avoided more reliably. And the thickness of the front panel 42 in the front-rear direction is increased because the control lever 43 and the headlamp 82 overlap in the vertical direction. The convenience can be reliably prevented.

  As shown in FIGS. 1 to 4, 16, and 17, the front cover 52 has a recessed portion 52 </ b> A that is recessed toward the rear of the vehicle body at a lower position on the left side that overlaps with the cutting and conveying device 4 in the front-rear direction. The recessed depth of the recessed portion 52 </ b> A allows the vertical frame portion 15 </ b> D standing on the right end side of the cutting and conveying device 4 to be engaged, and the vertical frame portion 15 </ b> D at the time of raising and lowering the cutting and conveying device 4. It is set to a depth to avoid contact.

  As a result, it becomes possible to deploy the cutting and conveying device 4 having a wide left and right width and the front panel 42 that are configured to cut the entire surface in a state where they are closer to each other in the front-rear direction of the vehicle body, thereby shortening the overall length of the vehicle body. As a result, a wider boarding space can be secured, and as a result, it is possible to improve the comfort while avoiding a decrease in steering performance and a decrease in workability due to an increase in the size of the vehicle body.

  Further, when the cutting and conveying device 4 and the front panel 42 approach each other in the front-rear direction, the far-field irradiation by the halogen bulb 80 on the upper side of the headlamp 82 provided on the front panel 42 is caused, for example, the pulling device 17 of the cutting and conveying device 4. Can be satisfactorily performed in a state that is not easily obstructed by the light source, and can be favorably irradiated in the vicinity of each divider 16 and harvested crops located in the vicinity thereof by the halogen bulb 81 below the headlamp 82, Thereby, even at night, it becomes easy to grasp the road surface condition in front of the vehicle body, the positional relationship between the cutting and conveying device 4 and other things, or the positional relationship between the cutting and conveying device 4 and harvested crops located in the vicinity thereof, When traveling at night, it is easy to avoid contact with other parts of the cutting and transporting device 4, and when working at night, it is easy to perform alignment, etc. Further so thereby improving the running properties and workability between.

  1-4 and FIG. 16, the upper end part of the right side surface in the front panel 42, the upper end part of the left cover 86 in the cutting and conveying apparatus 4, the upper left end part of the threshing apparatus 5, and the right side surface of the Glen tank 6 Each upper portion is equipped with a winker 87, and the winker 87 of the threshing device 5 and the winker 87 of the Glen tank 6 are positioned at the same height position, and the winker 87 of the front panel 42 is also located. And the winker 87 of the left cover 86 are arranged and set so as to be located at the same height position when the cutting and conveying apparatus 4 is raised to a predetermined height position for moving travel [(B) of FIG. reference〕.

    [Another embodiment]

[1] The harvesting vehicle may be configured to harvest beans such as soybeans and red beans, or may be configured to harvest root vegetables such as carrots and radishes. May be.

[2] The harvesting device 4 can be repositioned in the left-right direction of the vehicle body between a swivel cutting operation position that does not overlap with the boarding operation unit 3 in front view and a mid-cut operation position that overlaps with the boarding operation unit 3 in front view. It may be configured as follows.

[3] The control panel 42 may be a control tower erected in a tower shape, a side panel 45 provided on the left or right side of the boarding operation unit 3, or the like.

[4] The operation lever 43 may be a neutral return type that is configured exclusively for lifting and lowering and a back and forth swing type, or a neutral return type that is configured exclusively for steering and a left and right swing type. Good.

[5] The control valve operated by the operation lever 43 may be a steering valve.

[6] Release wires may be adopted as the operation wires 68 and 70.

[7] Various modifications can be made to the configuration of the headlamp 82. For example, instead of the halogen bulbs 80 and 81, a high-intensity discharge lamp (HID) having a discharge tube, a light emitting diode (LED), or the like It may be configured to be equipped with a single-lamp type or a three-lamp type or more, and the upper and lower valves 80 and 81 are located at the same position in the left-right direction and the front-rear direction. You may comprise as follows.

[8] Equipped with a plurality of traveling and working headlamps 82, the traveling headlamp 82 is raised above the front panel 42, and the cutting and conveying device 4 is raised to a height range for moving traveling. Even if it is a case, the front lamp 82 for work is set so that it may be located in the height position which is not covered with the divider 16 etc. which are located in the right end of the cutting and conveying apparatus 4 in front view. You may arrange | position in the lower part of 42 so that it may be located in the position near the cutting conveyance apparatus 4 rather than the headlamp 82 for driving | running | working.

Combine right side view Overall plan view of combine Plan view of the main part showing the maintenance state of the cutting and conveying device Combine front view Front view of the main part showing the support structure of the cutting and conveying device Partial vertical cross-sectional left side view of the main part showing the support structure of the left and right swing fulcrum of the cutting and conveying device Longitudinal left side view of the main part showing the support structure of the left and right swing free end of the cutting and conveying device The top view of the principal part which shows the fixed state in the working position of a cutting and conveying apparatus The top view of the principal part which shows the fixed release state in the working position of a cutting and conveying apparatus Longitudinal right side view of the main part showing the floating holding structure of the cutting and conveying device Longitudinal left side view of the main part showing the lifting and lowering structure of the cutting and conveying device Cross-sectional plan view of the main part showing the connection structure between the cutting frame and the lifting cylinder Hydraulic circuit diagram showing the lifting and lowering operation structure of the cutting and conveying device Front view of lift mechanism Longitudinal front view of ascending bias mechanism Front view of the main parts showing the arrangement of the control lever and headlight Partial vertical cross-sectional left side view of the main parts showing the arrangement of the control lever and lift valve Longitudinal front view of the main part showing the configuration of the control lever Longitudinal left side view of the main part showing the configuration of the control lever Longitudinal right side view of the main part showing the configuration of the control lever Cross-sectional plan view of the main part showing the arrangement of the lift valve

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Boarding operation part 4 Harvesting device 20 Lifting cylinder 42 Control panel 43 Control lever 50 Boarding step 69 Lifting valve (control valve)
68, 70 Operation wire 71 Hydraulic pump 72 Supply / drain oil passage 75 Check valve (Pilot operation type)
82 Headlight

Claims (4)

An operation structure of a harvesting work vehicle in which an operation lever for hydraulic operation is provided on a control panel erected in a boarding operation unit,
An operation structure of a harvesting work vehicle in which a control valve operated by the operation lever is arranged at a position below a boarding step in the boarding operation unit.   The operation structure of the harvesting work vehicle according to claim 1, wherein the operation lever and the control valve are linked by an operation wire passing through an internal space of the control panel.   The control valve is a lift valve that controls the flow of hydraulic oil to a single-acting lift cylinder that lifts and lowers the harvesting device hydraulically, and the lift valve is connected to a supply / discharge oil passage extending between the lift valve and the lift cylinder. 3. A pilot operated check valve that is opened by hydraulic oil from a hydraulic pump supplied via the lift valve when the engine is switched to a lowered state. Structure of the harvesting work vehicle.   The operation structure of the harvesting work vehicle according to any one of claims 1 to 3, wherein the control panel is equipped with a headlamp.

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