JP2007308116A - Working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that existence of an operation panel body 10 becomes obstructive when maintenance of an upper part or the like of an engine is performed because an upper side of the engine 5 is covered by the operation panel body 10, in a riding type transplanter provided with the engine 5, a steering wheel body 15 arranged behind the engine 5 and the operation panel body 10 covering the upper side of the engine 5. <P>SOLUTION: A steering wheel upper shaft 41 of the steering wheel body 15 is constituted vertically turnably so as to approach/leave from the operation panel body 10 making a laterally directed tilt shaft 46 as a center. The operation panel body 10 is constituted vertically opening/closing turnably so as to approach/leave from the steering wheel body 15 making a cylindrical shaft part 65 as a lateral support shaft parallel to the tilt shaft 46 of the turning frame 61. The steering wheel upper shaft 41 and the operation panel body 10 are independently turnably constituted respectively. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a work vehicle such as a farm work machine such as a rice transplanter or a tractor, or a special work vehicle such as a wheel loader.

  2. Description of the Related Art Conventionally, a riding rice transplanter as an example of a work vehicle includes an engine mounted on a front portion of a traveling machine body and a steering handle body disposed behind the engine. The engine and the steering shaft of the steering handle body are often covered with a cover device that can be divided into a plurality of parts in order to facilitate maintenance work (especially for the engine).

  As an example of such a riding type rice transplanter, Patent Document 1 discloses a cover device, an operation panel body that covers the upper part of the engine, a front cover body that covers the front part of the engine, and a rear cover that covers the rear part of the engine and the handle shaft. A body divided into three parts is disclosed.

In the riding type rice transplanter described in Patent Document 1, the front cover body and the rear cover body are detachably attached to the traveling machine body, and the operation panel body is fixed to the handle shaft. When carrying out engine maintenance work, the front and rear cover bodies are removed to expose the engine's four rounds (front and rear, left and right).
JP-A-10-210816

  However, in the conventional configuration, the operation panel body is fixed to the handle shaft with a plurality of bolts, and the upper part of the engine is still covered with the operation panel body. When performing maintenance on certain devices (for example, an air cleaner), the presence of the operation panel body is an obstacle. In addition, even if the operation panel body is removed, it takes time to loosen a plurality of bolts. That is, in the configuration of Patent Document 1, there is a problem that the maintenance work of the devices in the upper part of the engine or in the part is inconvenient or difficult.

  Further, the operation panel body is often provided with a display panel for displaying various information about the riding type rice transplanter. In this case, the display panel is provided on the back side (above the engine) of the operation panel body. Control box is arranged.

  However, in the conventional configuration, the control box is positioned between the operation panel body bolted to the handle shaft and the engine. Therefore, in manufacturing the riding rice transplanter, the harness is connected to the control box. There was also a problem that it was difficult to work and workability was poor.

  Therefore, the present invention has a technical problem to provide a work vehicle that solves all of the above problems.

  In order to achieve this technical problem, the invention of claim 1 is directed to a power source mounted at a front portion of a traveling machine body, a steering handle body disposed behind the power source, and an upper part of the power source. A work vehicle including an operation panel body that covers at least a part, wherein the steering handle body is rotatable up and down so as to be in contact with and away from the operation panel body with a horizontal tilt axis as a center. On the other hand, the operation panel body is configured to be vertically openable and closable so as to be in contact with and away from the steering handle body about a lateral support shaft that is coaxial or parallel to the tilt shaft. The handle upper shaft and the operation panel body can be independently rotated.

  According to a second aspect of the present invention, in the work vehicle according to the first aspect, the rear end of the upper frame located above the power source is supported on a support member that is erected at a rear portion of the power source in the traveling machine body. And a front end portion of the upper frame is detachably connected to the traveling machine body, and the operation panel body is attached to the upper frame. It is that.

  According to a third aspect of the present invention, in the work vehicle according to the second aspect, an operation lever means for operating the traveling machine body projects outward from an upper surface of the operation panel body, and the operation lever means The base end portion is attached to the upper frame so as to rotate integrally with the upper frame.

  According to a fourth aspect of the present invention, in the work vehicle according to the second or third aspect, a front cover body and a rear cover body surrounding the power source and the operation panel body from the front and rear are provided at a front portion of the traveling machine body. Each of the front frames is detachably mounted, and a front end portion of the upper frame is detachably connected to an auxiliary frame standing in front of the power source in the traveling machine body. In a state where is removed, the front end portion of the upper frame is exposed in front of the operation panel body.

  In the configuration of claim 1, the handle upper shaft of the steering handle body disposed behind the power source is in contact with and separated from the operation panel body covering at least a part above the power source with the horizontal tilt axis as the center. The operation panel body is vertically openable and closable so as to be in contact with and away from the steering handle body about a lateral support shaft that is coaxial or parallel to the tilt shaft. The handle upper shaft and the operation panel body are configured to be rotatable independently of each other.

  According to such a configuration, after the handle upper shaft is tilted and rotated downward about the tilt axis, the operation panel body is moved to the power by rotating the operation panel body upwardly about the lateral support shaft. A sufficient space for inserting a hand is opened apart from the upper surface of the source between the operation panel body and the upper surface of the power source.

  For this reason, the presence of the operation panel body does not get in the way when maintenance is performed on the upper part of the power source and the devices (for example, an air cleaner) in the place. Further, it is not necessary to remove the operation panel body as in the prior art at the time of maintenance, and the labor of such removal work can be saved. Therefore, there is an effect that the maintenance work of the devices at the upper part of the power source or at the place can be easily performed.

  In addition, since a sufficient space for inserting a hand is opened between the operation panel body and the upper surface of the power source, for example, a control box is provided on the back side of the operation panel body (above the power source). When arranged, the work of connecting the harness to the control box can be easily performed, and there is an effect that the workability of the work vehicle can be improved.

  In the configuration of claim 2, a rear end portion of the upper frame positioned above the power source is rotated via the lateral support shaft on a support member that is erected at a rear portion of the power source in the traveling machine body. A front end portion of the upper frame is removably connected to the traveling machine body, and the operation panel body is attached to the upper frame.

  When such a configuration is adopted, the horizontal support shaft, which is the rotation center of the upper frame, is on the rear end side of the upper frame, that is, the side closer to the steering handle body. If the upper support shaft is pivoted upward and open, the space formed between the operation panel body and the upper surface of the power source is opened forward.

  For this reason, the operator can perform maintenance on the upper part of the power source and the devices in the relevant part from the front side of the traveling machine body. Therefore, during maintenance, the presence of the steering handle body does not get in the way, and the working efficiency can be improved.

  According to the configuration of claim 3, from the upper surface of the operation panel body, the operation lever means for operating the traveling machine body protrudes outward, and the base end of the operation lever means is the upper frame. Is attached to the upper frame so as to rotate integrally with the upper frame, and the operation lever means also rotates the lateral support shaft in conjunction with the vertical opening / closing rotation of the upper frame and the operation panel body. It will rotate with the center.

  For this reason, when the upper frame and the operation panel body are vertically opened and closed, it is not necessary to remove the operation lever means, and the presence thereof does not get in the way. Therefore, the upper frame and the operation panel body can be easily opened / closed and rotated, and this also brings about an effect that it is possible to contribute to an improvement in the efficiency of maintenance work on the upper portion of the power source and the devices at the location.

  According to the configuration of claim 4, a front cover body and a rear cover body that surround the power source and the operation panel body from the front and rear are detachably attached to the front portion of the traveling machine body, A front end portion of the frame is detachably connected to an auxiliary frame standing in front of the power source in the traveling machine body. When the front cover body is removed, a front end portion of the upper frame is Since it is exposed to the front of the operation panel body, the operator can hold the front end of the upper frame and perform the opening / closing rotation operation of the upper frame and the operation panel body. That is, since the front end of the upper frame also has a function as a handle for the vertical opening / closing rotation operation, the upper frame and the operation panel body can be operated to be opened / closed even if there is no dedicated handle part. It is easy to do, and there exists an effect that it can contribute to suppression of a number of parts.

  DESCRIPTION OF EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings (FIGS. 1 to 10). 1 is a side view of a riding type rice transplanter as a work vehicle, FIG. 2 is a plan view of the riding type rice transplanter, FIG. 3 is a plan view of a front portion of a traveling machine body, and FIG. FIG. 5 is a perspective view of the steering handle body as viewed obliquely from the rear, FIG. 6 is a perspective view of the steering handle body and the upper frame as viewed from diagonally forward, and FIG. FIG. 8 is a side view of the front part of the traveling machine body, FIG. 9 is a side view of the front part of the traveling machine body in a state where the upper frame is pivoted upward, and FIG. 10 is an operation panel body. FIG. 3 is an exploded perspective view of a bonnet cover body and a column cover body.

(1). First, an outline of a riding type rice transplanter as a work vehicle will be described with reference mainly to FIGS.

  As shown in FIGS. 1 to 3, the traveling machine body 1 of the riding type rice transplanter in the embodiment includes a machine body frame 2, and the machine body frame 2 includes left and right front wheels 3 disposed on the front and rear sides of the left and right sides. It is supported by the left and right rear wheels 4.

  An engine 5 as a power source is mounted on the front portion 1 of the traveling machine body. An air cleaner 31 is disposed on the upper surface of the engine 5 (see FIG. 4). A mission case 6 having a hydrostatic continuously variable transmission mechanism and the like is disposed at the lower rear portion of the engine 5.

  A front axle case 7 protrudes left and right from the left and right side portions of the transmission case 6, and the front wheels 3 are attached to both ends of the front axle case 7 so as to be steerable. A rear axle case 9 is fixed to a cylindrical frame 8 protruding rearward from the transmission case 6, and the rear wheels 4 are attached to the left and right sides of the rear axle case 9.

  The upper surface of the body frame 2 is covered with a plurality of cover bodies, and each cover body is configured to be detachable. For example, the outer periphery of the engine 5 is surrounded by an operation panel body 10 as a front bonnet, a bonnet cover body 11 and a column cover body 12 from above and from the front and rear, and each is configured to be detachable (FIG. 4). reference). The bonnet cover body corresponds to the front cover body described in the claims, and the column cover body corresponds to the rear cover body described in the claims.

  In addition, the outer peripheries of the lower ends of the bonnet cover body 11 and the column cover body 12 in the front upper portion of the body frame 2 are covered with a front body cover body 13 having a substantially rectangular shape in plan view. The rear upper surface of the body frame 2 is covered with a rear body cover body 14 formed in a continuous form from the rear end of the front body cover body 13.

  On the upper surface of the mission case 6, a tilt type steering handle body 15 for steering the traveling machine body 1 is erected. The front end (upper end) side of the steering handle body 15 protrudes upward from the front bonnet, and a steering round handle 43 is attached to the front end.

  A driver's seat 17 is provided on the upper surface of the rear body cover body 14 behind the steering handle body 15 via a seat frame 16. In this case, when the operator sitting on the driver's seat 17 turns the steering round handle 43, the steering angle (steering angle) of the left and right front wheels 3 changes according to the operation amount (turning amount). It is configured.

  Note that a shift pedal 18 for appropriately adjusting the vehicle speed of the traveling machine body 1 and the traveling machine body 1 are braked from between the rear edge of the front body cover body 13 and the front edge of the rear body cover body 14 (gap). A brake pedal 19 for operation protrudes upward (see FIG. 2). Further, on the left and right sides of the front machine body cover body 13, a spare seedling stage 20 for placing a plurality of spare seedling mats is provided.

  A main speed change lever 21 is provided on one side of the operation panel body 10 with the steering handle body 15 interposed therebetween so that the traveling machine body 1 can be moved forward, stopped, reverse, and the vehicle speed can be changed. On the other side of the operation panel body 10, an accelerator lever 22 for adjusting the number of revolutions of the engine 5 and an auto for driving the traveling machine body 1 at a constant speed while keeping the operation position of the shift pedal 18 constant. A cruise lever 23 and a shift lever 24 for performing raising / lowering operation and power disconnection operation of a seedling planting device 25 described later are arranged (see FIG. 3). Each of these levers 21 to 24 corresponds to the operating lever means described in the claims.

  A seedling planting device 25 for six-row planting is connected to the rear end portion of the machine body frame 2 through a parallel link mechanism 26 composed of upper and lower links so as to be adjustable up and down. The seedling planting device 25 has a conventionally known structure. That is, the seedling planting device 25 includes three sets of transmission cases 27 to which power is transmitted from the transmission case 6, rotary seedling planting mechanisms 28 attached to the left and right sides of each transmission case 27, and the upper end of the traveling body 1. And a seedling stand 29 attached to the upper surface of the transmission case 27 in a forward tilted posture, and a float 30 for surface flattening disposed on the lower surface of the transmission case 27.

(2). Next, the structure of the steering handle body will be described with reference to FIGS. 4 to 9.

  The steering handle body 15 includes a handle lower shaft 40 projecting upward on the upper surface of the transmission case 6, a handle upper shaft 41 connected to an upper end portion of the handle lower shaft 40 via a universal joint 42, a handle A steering round handle 43 attached to the upper end of the upper shaft 41 is provided.

  The outer periphery of the handle lower shaft 40 is surrounded by a lower column cylinder 44 as a support member fixed to the outer surface of the transmission case 6, and the handle lower shaft 40 can only rotate with respect to the lower column cylinder 44. It is pivotally supported.

  The handle upper shaft 41, together with the upper column cylinder 45 fitted on the outer periphery thereof, is configured to be able to be bent and rotated (tilt rotation) in the vertical direction around the tilt shaft 46 in the horizontal direction of the universal shaft joint 42. (See FIGS. 4 and 9).

  A handle upper shaft 41 is supported on the upper column tube 45 so as to be rotatable only. At the lower end of the upper column cylinder 45, posture adjusting means 47 is provided for adjusting the bending angle (tilt angle) of the upper column cylinder 45 and the handle upper shaft 41 in a plurality of stages (see FIG. 5).

  The posture adjusting means 47 is a pivotable tilt rotation lever that is attached to the upper end portion of the lower column cylinder 44 so as to extend rearward with respect to a fixed bracket 53 having an upward U-shaped cross section that protrudes obliquely upwards forward. 48 and a locking plate 49 provided at the lower part of the side surface of the upper column cylinder 45 so as to confront the middle part of the tilt rotation lever 48 from below.

  The base end portion of the tilt rotation lever 48 is mounted so that it can be rotated up and down by a pivot shaft 50 that is lateral to the fixed bracket 53. A downward hook-like engagement hook 51 is fixed to the middle part of the tilt rotation lever 48 in the longitudinal direction. On the other hand, a plurality of locking grooves 52 are formed on the upper end surface of the locking plate 49 at appropriate intervals along the rotation direction about the tilt shaft 46.

  When the upper column cylinder 45 and the handle upper shaft 41 are bent and rotated at a predetermined bending angle (tilt angle), the engagement hook 51 of the tilt rotation lever 48 is an arbitrary one of the plurality of locking grooves 52. By selectively engaging with each other, the inclination postures of the upper column cylinder 45 and the handle upper shaft 41 are changed and adjusted in stages and held.

  The tilt rotation lever 48 is always urged by a spring member (not shown) in a direction in which the engagement hook 51 engages with the locking groove 52 of the engagement plate 49. The free end (tip) of the tilt rotation lever 48 protrudes outward (backward) from the column cover body 12.

(3). Next, the cover body positioned around the engine and the support structure thereof will be described with reference mainly to FIGS.

  The operation panel body 10 covering the upper side of the engine 5 has a substantially elliptical shape in plan view, and is located above the engine 5 so as to protrude from the middle part of the upper column cylinder 45 toward the front of the traveling machine body. It is attached to the positioned upper frame 60 (details will be described later). A display unit 10b, a key switch, and the like are arranged on the upper surface of the operation panel body 10. A control box 117 is provided on the back side of the display unit 10b to control display of the display unit 10b (see FIGS. 8 to 10).

  The column cover body 12 is formed in a substantially arc shape in plan view so as to surround the operation panel body 10 and the upper column cylinder 45 from the rear. The left and right front end edges 12a of the column cover body 12 are formed in a slanting shape that is inclined forward and downward so as to exactly overlap the left and right rear end edges 11a of the bonnet cover body 11.

  The lower end edge 12b of the column cover body 12 is formed in a slanting rearward and upwardly inclined shape so as to exactly overlap the upper surface edge 13a of the front lower cover body 13. On the lower end edge 12b, downward tongue pieces 82 are integrally projected at a plurality of locations (see FIGS. 4 and 10), and each tongue piece 82 is formed on the upper surface edge 13a of the front body cover body 13. The fitting hole 83 (see FIG. 3) is configured to be fitted from above.

  Further, the upper end edge of the column cover body 12 is formed so as to closely contact the rear end portion and the left and right end portions of the lower end edge of the operation panel body 10. Then, the column cover body 12 is engaged by hooking the front end flanges of a pair of left and right coil springs 84 attached to a plate plate 72 of the front frame 62 described later on a locking bracket 58 formed on the inner surface of the column cover body 12. The entire column cover body 12 is biased forward (see FIG. 8) so that the upper end edge thereof is not rattled by being brought into close contact with the lower end edge of the operation panel body 10.

  The rear part of the operation panel body 10 and the upper part of the column cover body 12 are formed with notched concave grooves 10a and 12c (see FIG. 10) for allowing the upper column cylinder 45 and the handle upper shaft 41 to rotate up and down. Yes. In a state where the operation panel body 10 and the column cover body 12 are mounted, both 10a and 12c are combined to form a long hole that is long in the vertical direction, and the upper column cylinder 45 and the handle upper shaft 41 are notched concave grooves 10a and 12c (long Along the hole), the control panel body 10 is rotated up and down so as to be in contact with and away from the operation panel body 10.

  As shown in FIGS. 2, 3, and 10, the bonnet cover body 11 is formed in a streamlined shape (elliptical shell shape) that tapers toward the front end (front end), and the left and right rear edges of the bonnet cover body 11 11a is formed in a slanting shape that is inclined rearward and upward toward the rear of the body frame 2 as it goes upward from the lower side. A plurality of guide tongues 79 projecting rearward are formed on the left and right rear end edges 11a (in the embodiment, two upper and lower portions, see FIGS. 4 and 10), and when the bonnet cover body 11 is mounted, These guide tongues 79 are configured to enter the inner surface side from the left and right front end edges 12 a of the column cover body 12.

  The lower end edge 11b of the bonnet cover body 11 is formed in a slanted rearward and upwardly inclined shape so as to be slidable on the upper surface edge 13a inclined obliquely upward and rearward with a gentle slope in the front body cover body 13. Yes. A downward locking tongue piece 80 is integrally protruded at the front end portion of the lower end edge 11b (see FIGS. 4 and 10), and the locking tongue piece 80 is a front body cover body. 13 is configured to be fitted from above into a locking hole 81 (see FIG. 3) formed at the front end portion of the upper surface edge 13a.

  The upper frame 60 that supports the operation panel body 10 from below is constituted by a rotating frame 61 having a substantially E shape in plan view and a front frame 62 having a substantially U shape in plan view. In the embodiment, the front ends of the left and right arms 71 extending rearward in the front frame 62 are bolted to the front surface of the horizontal bar 63 in the rotating frame 61. The front and rear length of the front frame 62 is set to such a dimension that the front end portion of the front frame 62 projects forward from the front end of the operation panel body 10 and protrudes greatly from the operation panel body 10 in plan view.

  Side arms 64 extending in parallel to each other protrude from portions of the rotating frame 61 near both ends of the horizontal bar 63, and the projecting ends of the both side arms 64 penetrate in a concentric manner in the left-right direction. A cylindrical shaft portion 65 is provided as a lateral support shaft.

  On the other hand, a pair of left and right wing arms 67 are fixed to a bracket plate 66 fixed to the upper front portion of the lower column cylinder 44 by welding or the like so as to protrude outward in the left and right directions. Are attached with pivot boss portions 68 that pass through concentrically in the left-right direction.

  The cylindrical shaft portion 65 of each side arm 64 in the rotation frame 61 is inserted and attached to the corresponding pivot boss portion 68 of the wing arm 67 so as to be rotatable from the left and right outer sides. For this reason, the rotation frame 61 and thus the upper frame 60 and the operation panel body 10 are configured to be vertically openable and closable around a cylindrical shaft portion 65 on the same axis extending in parallel with the tilt shaft 46.

  In this case, the upper frame 60 and the operation panel body 10, and the upper column cylinder 45 and the handle upper shaft 41 are configured to be independently rotatable, and the upper frame 60 and the operation panel body 10 are configured to have a cylindrical shaft. When the upper frame 60 and the operation panel body 10 are turned up and down around the portion 65, the steering handle body 15 (the upper column cylinder 45 and the steering round handle 43) approaches or moves away. However, when the upper column cylinder 45 and the handle upper shaft 41 are inclined obliquely upward (at the time of steering operation), the upper frame 60 and the operation are performed due to the presence of the upper column cylinder 45 and the handle upper shaft 41. The upward opening rotation of the panel body 10 is restricted.

  In the embodiment, since the cylindrical shaft portion 65 as the rotation center is on the rear end side of the upper frame 60, that is, on the side close to the steering handle body 15, the upper frame 60 and the operation panel body 10 are rotated upward and open. A space opened forward is formed between the operation panel body 10 and the upper surface of the engine 5 (see FIGS. 4 and 9).

  A horizontal shaft 93 projecting from the lower end portion of the main transmission lever 21 to the left and right is pivotally inserted into and attached to the cylindrical shaft portion 65 of one side arm 64, and the cylinder of the other side arm 64 is mounted. The horizontal shaft 114 of the relay rod 113, which is one component of the shift interlocking mechanism 112 that interlocks and connects the lifting and lowering means and power disconnecting means of the seedling planting device 25 and the shift lever 24, is rotatable on the shaft 65. (See FIG. 7).

  A center arm 69 that protrudes in the same direction as the left and right side arms 64 is attached to a middle portion of the horizontal bar 63 in the rotating frame 61. The center arm 69 is detachably fitted from above to a fixed bracket 53 having an upward U-shaped cross section provided at the upper end of the lower column cylinder 44. That is, the center arm 69 is supported from below by the fixed bracket 53 on the lower column cylinder 45 side.

  As shown in FIGS. 3 and 8, the linkage arm 70 located on the front end side of the front frame 62 is connected to an auxiliary frame 54 having a reverse U-shape when viewed from the front and erected in front of the engine 5 in the body frame 2. On the other hand, it is detachably connected with bolts and nuts. Therefore, in a state where the upper frame 60 is closed and rotated around the cylindrical shaft portion 65, the front and rear surfaces and the upper surface of the engine 5 are surrounded by the auxiliary frame 54, the upper frame 60 and the lower column cylinder 44.

  A horizontally long support stay 73 is attached between the plate plates 72 fixed to the left and right arms 71 of the front frame 62, and the presence of the support stay 73 improves the rigidity of the front frame 62. . A fuse box 74 is disposed on the upper surface of the support stay 73. Of course, the upper portion of the fuse box 74 is covered with the operation panel body 10.

  Between the plate plates 72 of the left and right arms 71, a horizontally long latch shaft 75 is also mounted so as to be rotatable about the horizontal axis, and protrudes outward from the plate plate 72 of the latch shaft 75 to the left and right. A forward hook-like latch claw 76 is fixed to both ends. A latch lever 77 that protrudes upward and intersects with the latch shaft 75 is provided in the middle of the longitudinal axis of the latch shaft 75.

  The pair of left and right latch claws 76 rotate back and forth around the latch shaft 75, thereby engaging pins 56 (see FIGS. 8 and 10) protruding laterally from the bracket plate 55 provided on the inner surface of the bonnet cover body 11. ). The latch claw 76 is always in a forward rotation direction that can be engaged with the engagement pin 56 on the bonnet cover body 11 side by the elastic biasing force of the torsion spring 78 mounted between the latch claw 76 and the plate plate 72. It is energized.

  When the latch claw 76 is hooked and engaged with the engagement pin 56 on the bonnet cover body 11 side, the bonnet cover body 11 is locked forward so that it cannot be removed. When the bonnet cover body 11 is removed, the latch claw 76 is rotated backward about the latch shaft 75 by the forward turning operation of the latch lever 77, whereby the latch claw 76 and the engagement pin on the bonnet cover body 11 side. What is necessary is just to release engagement (lock) with 56.

  In addition, a lid cover 57 configured to be capable of opening and closing up and down around the rear end portion is provided at the front upper portion of the operation panel body 10, and when the lid cover 57 is manually opened and rotated, The latch lever 77 is configured to appear.

(4). Configuration of Operation Lever Means Next, the configuration of the operation lever means protruding outward from the upper surface of the operation panel body will be described with reference to FIGS. 3 and 5 to 9.

  The base end portion of each operation lever means in the embodiment is attached to the upper frame 60 so as to rotate integrally around the cylindrical shaft portion 65 together with the upper frame 60 and the operation panel body 10.

  That is, the main transmission lever 21 located on one side of the steering handle body 15 on the left and right sides of the operating lever means is provided with a boss portion 90 penetrating in the front-rear direction at the lower end portion (base end portion). The part 90 is disposed in a box-shaped bracket 91 that is opened up and down (see FIGS. 6 and 7). A pin shaft 92 extending in the front-rear direction passes through the boss portion 90 and the box bracket 91 of the main transmission lever 21. For this reason, the main speed change lever 21 is configured to be rotatable left and right around the pin shaft 92.

  As shown in FIG. 7, a horizontal shaft 93 protrudes laterally from one side of the box-shaped bracket 91, and the horizontal shaft 93 is a cylindrical shaft portion of one side arm 64 in the rotating frame 61. 65 is inserted and mounted so as to be rotatable from the left and right outer sides. For this reason, the box-shaped bracket 91 and thus the main transmission lever 21 are configured to be able to rotate back and forth about the horizontal axis 93. Therefore, in the embodiment, the main transmission lever 21 is configured to be rotatable in the front-rear direction and the left-right direction. A horizontal shaft 93 of the box-type bracket 91 is a gear-type transmission mechanism (not shown) to which power from the hydrostatic continuously variable transmission mechanism in the transmission case 6 is transmitted via a gear-change interlocking mechanism 94 such as a link or a wire. )).

  Above the box-shaped bracket 91 is a shift guide plate 95 fixed to one end of the horizontal bar 63 in the rotating frame 61, and the main shift lever 21 is a guide groove 96 formed in the shift guide plate 95. And protrudes to the outer surface of the operation panel body 10. For this reason, the main transmission lever 21 can be operated to rotate back and forth and right and left along the guide groove 96 of the transmission guide plate 95. Then, the rotation range of the main transmission lever 21 is restricted by the presence of the guide groove 96.

  As shown in FIG. 7, the accelerator lever 22 of the three levers 22 to 24 located on the left and right sides of the steering handle body 15 has a rotating plate 97 fixed to its lower end (base end). It is attached to the upward bracket 98 (see FIGS. 5 and 7) fixed to the cylindrical shaft portion 65 of the other side arm 64 in the rotation frame 61 so as to be able to rotate back and forth around the pin shaft 99 in the lateral direction. . The rotation plate 97 of the accelerator lever 22 is interlocked and connected to a rotation speed setting control lever (not shown) provided in the engine 5 via an accelerator interlocking mechanism 100 such as a wire.

  A lever guide plate 102 is attached to the other end portion of the horizontal bar 63 in the rotating frame 61 via a shift bracket 101 protruding upward from the horizontal bar 63, and the accelerator lever 22 is attached to the lever guide plate 102. It penetrates the formed accelerator guide groove 103 (see FIGS. 6 and 7) and protrudes from the outer surface of the operation panel body 10. Therefore, the accelerator lever 22 can be rotated in the front-rear direction along the accelerator guide groove 103 of the lever guide plate 102. And the rotation range of the accelerator lever 22 is regulated by the presence of the accelerator guide groove 103.

  The auto cruise lever 23 includes a boss portion 104 penetrating in the left-right direction at a lower end portion (base end portion) thereof, and this boss portion 104 is fixed to the upper surface of the other side arm 64 in the rotating frame 61. The pin shaft portion of the U-shaped support shaft 105 (see FIGS. 5 and 7) is rotatably fitted. For this reason, the auto cruise lever 23 is also configured to be capable of rotating back and forth around the pin shaft portion of the U-shaped support shaft 105 in the same manner as the accelerator lever 22. An L-shaped arm 106 provided integrally with the boss 104 of the auto-cruise lever 23 is a vehicle speed maintaining mechanism (see FIG. 5) located in the vicinity of the speed change pedal 18 via a cruise interlocking mechanism (not shown) such as a wire. (Not shown).

  The auto cruise lever 23 passes through a cruise guide groove 107 (see FIGS. 3, 6 and 7) formed in the lever guide plate 102 and protrudes from the outer surface of the operation panel body 10. Therefore, the auto cruise lever 23 can also be rotated in the front-rear direction along the cruise guide groove 107 of the lever guide plate 102. The rotation range of the auto cruise lever 23 is restricted by the presence of the cruise guide groove 107.

  The shift lever 24 includes a boss portion 108 penetrating substantially vertically at a lower end portion (base end portion) thereof, and the boss portion 108 is disposed in a receiving bracket 109 having a U-shaped cross section. A substantially vertical pin shaft 110 passes through the boss portion 108 and the receiving bracket 109 of the shift lever 24, and the shift lever 24 is configured to be turnable around the pin shaft 110.

  The receiving bracket 109 is pivotable around the boss shaft 111 by a boss shaft 111 (see FIGS. 5, 7, and 8) that protrudes inward from the side of the shift bracket 101 in the horizontal bar 63. It is supported. Therefore, like the main transmission lever 21, the shift lever 24 is configured to be able to rotate back and forth and left and right. The receiving bracket 109 is interlocked and connected to an elevating means and a power disconnecting means (not shown) of the seedling planting device 25 via a shift interlocking mechanism 112 such as a link or a wire.

  Similarly to the accelerator lever 22 and the auto cruise lever 23, the shift lever 24 passes through the shift guide groove 115 (see FIGS. 3, 6, and 7) formed in the lever guide plate 102 and passes through the operation panel body 10. Protrudes from the outside. Therefore, the shift lever 24 can be rotated back and forth and right and left along the shift guide groove 115 of the lever guide plate 102. The rotation range of the shift lever 24 is also restricted by the presence of the shift guide groove 115.

  As can be seen from these configurations, the rotating frame 61 is configured so that the base end portions of the operation lever units 21 to 24 in the embodiment rotate integrally with the rotating frame 61 constituting the upper frame 60. It is attached to.

(5). According to the above configuration, the upper column cylinder 45 and the handle upper shaft 41, the upper frame 60 and the operation panel body 10 are configured to be independently rotatable up and down. After the column cover body 12 is removed and the upper column cylinder 45 and the handle upper shaft 41 are tilted downward and rotated around the tilt axis 46, the upper frame 60 and the operation panel body 10 are turned upward around the cylindrical shaft section 65. When the opening is turned, the upper frame 60 and the operation panel body 10 are separated from the upper surface of the engine 5, and sufficient to insert a hand between the upper frame 60 and the operation panel body 10 and the upper surface of the engine 5. Space will open.

  For this reason, the presence of the upper frame 60 and the operation panel body 10 does not get in the way when maintenance is performed on the upper portion of the engine 5 and the devices (for example, the air cleaner 31) in the relevant portion. Further, it is not necessary to remove the operation panel body 10 as in the prior art at the time of maintenance, and the labor of such removal work can be saved. Therefore, it is easy to perform maintenance work on the upper part of the engine 5 and the devices in the place.

  In addition, since a sufficient space for inserting a hand is opened between the upper frame 60 and the operation panel body 10 and the upper surface of the engine 5, the control box on the back side of the display unit 10 b in the operation panel body 10. The work of connecting the harness to 117 can be easily performed, which can contribute to the improvement of the assembly workability of the riding type rice transplanter.

  In the embodiment, since the cylindrical shaft portion 65 that is the rotation center of the upper frame 60 is on the rear end side of the upper frame 60, that is, the side closer to the steering handle body 15, the upper frame 60 and the operation panel body 10 are directed upward. When the opening is turned, the space formed between the operation panel body 10 and the upper surface of the engine 5 is opened forward.

  Then, the operator can perform maintenance on the upper part of the engine 5 and the devices at the relevant part from the front side of the traveling machine body 1. For this reason, during the maintenance, the presence of the steering handle body 15 does not get in the way and work efficiency can be improved.

  Further, the lower end portions (base end portions) of the operation lever units 21 to 24 protruding outward from the upper surface of the operation panel body 10 are rotated integrally with the rotation frame 61 constituting the upper frame 60. Since the upper frame 60 and the operation panel body 10 are vertically opened / closed and rotated, the operation lever units 21 to 24 are also rotated around the cylindrical shaft 65 as the rotation center. Will move. For this reason, when the upper frame 60 and the operation panel body 10 are rotated up and down, it is not necessary to remove the operation lever means 21 to 24, and the presence thereof does not get in the way. Therefore, the upper frame 60 and the operation panel body 10 can be easily opened / closed and rotated, and this point can also contribute to improving the efficiency of the maintenance work for the upper portion of the engine 5 and the devices at the relevant location.

  Further, the linkage arm 70 located on the front end side of the front frame 62 is detachably connected to the auxiliary frame 54 erected in front of the engine 5 of the body frame 2 with bolts and nuts. Therefore, the front frame 62 (upper frame 60) and the auxiliary frame 54 can be easily attached and detached.

  In addition, the front-rear length of the front frame 62 is set such that the front end portion of the front frame 62 projects forward from the front end of the operation panel body 10, and the front frame 62 is removed when the bonnet cover body 11 is removed. Since the front end portion of 62 (the portion of the linkage arm 70) is exposed to the front of the operation panel body 10, the operator holds the exposed portion (the portion of the linkage arm 70) and opens and closes the upper frame 60 and the operation panel body 10 up and down. Can rotate. That is, since the linkage arm 70 of the front frame 62 also has a function as a handle for the vertical opening / closing rotation operation, the upper frame 60 and the operation panel body 10 can be operated for the vertical opening / closing rotation operation without a dedicated handle part. It is easy to remove and can contribute to the suppression of the number of parts.

(6). Others The present invention is not limited to the above-described embodiment, and can be embodied in various forms. For example, the invention of the present application is not limited to a riding type rice transplanter, but can be applied to special working vehicles such as farm working machines such as tractors and combines, and wheel loaders. Further, the lateral support shaft that is the rotation center of the operation panel body is not limited to being parallel to the tilt axis of the steering handle body, and may be positioned coaxially with the tilt axis, or the tilt shaft itself may be You may comprise so that it may function as a lateral support shaft.

  In addition, the structure of each part is not limited to embodiment of illustration, A various change is possible in the range which does not deviate from the meaning of this invention.

It is a side view of the riding type rice transplanter as a work vehicle. It is a top view of a riding type rice transplanter. It is a top view of a traveling machine body front part. It is a separated side view of the front part of the traveling machine body in a state where the upper frame is turned upward and opened. It is the perspective view which looked at the steering handle body from diagonally backward. It is the perspective view which looked at the steering handle body and the upper frame from diagonally forward. It is the perspective view which looked at the upper frame from diagonally backward. It is a side view of a traveling machine body front. It is a side view of the front part of the traveling machine body in a state where the upper frame is turned upward and opened. It is a separation perspective view of an operation panel body, a bonnet cover body, and a column cover body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling machine body 2 Airframe frame 5 Engine 6 Mission case 10 Operation panel body 11 Bonnet cover body 12 Column cover body 13 Front body cover body 14 Rear body cover body 15 Steering handle body 17 Driving seat 21 Main transmission lever 22 Acceleration lever 23 Auto Cruise lever 24 Shift lever 25 Seedling planting device 40 Handle lower shaft 41 Handle upper shaft 43 Steering round handle 44 Lower column tube 45 Upper column tube 46 Tilt shaft 47 Attitude adjustment means 60 Upper frame 61 Rotating frame 62 Front frame 65 Cylindrical Shaft 70 Linking arm 90 Main transmission lever boss 91 Box-shaped bracket 97 Accelerator lever rotating plate 104 Auto cruise lever boss 108 Shift lever boss 117 Control box

Claims (4)

A work vehicle comprising a power source mounted on a front portion of a traveling machine body, a steering handle body disposed behind the power source, and an operation panel body covering at least a part above the power source. There,
The steering handle body is configured to be rotatable up and down so as to be in contact with and away from the operation panel body about a horizontal tilt axis.
The operation panel body is configured to be vertically openable and closable so as to be in contact with and away from the steering handle body about a lateral support shaft that is coaxial or parallel to the tilt axis.
The work vehicle characterized in that the steering wheel upper shaft and the operation panel body can be independently rotated.   A rear end portion of the upper frame located above the power source is pivotally supported by the support member standing behind the power source in the traveling machine body via the lateral support shaft. The work vehicle according to claim 1, wherein a front end portion of the upper frame is detachably connected to the traveling machine body, and the operation panel body is attached to the upper frame.   An operation lever means for operating the traveling machine body protrudes outward from the upper surface of the operation panel body, and a base end portion of the operation lever means rotates integrally with the upper frame. The work vehicle according to claim 2, wherein the work vehicle is attached to the upper frame. A front cover body and a rear cover body surrounding the power source and the operation panel body from front and rear are detachably attached to the front part of the traveling machine body,
A front end portion of the upper frame is detachably connected to an auxiliary frame that is erected in front of the power source in the traveling machine body. When the front cover body is removed, the front end of the upper frame is The work vehicle according to claim 2, wherein a portion is exposed in front of the operation panel body.

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