JP2014082980A - Ground operation tool in sulky type traveling vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a structure and improve operability by dispensing with a sliding structure in a ground operation tool, and further, prevent rotational turning of the ground tool unless the ground operation tool is operated for a traveling operation outside the vehicle.SOLUTION: A ground operation tool 10 can freely changes an attitude among: a storage attitude where a handle part 48 is erected along the front end of a traveling machine body 2; an operation preparation attitude where the handle part 48 is rotationally turned forward from the storage attitude; and a traveling operation attitude where the arm part 47 is rotationally downward turned according to the depressing operation of the handle part 48 in the operation preparation attitude. The ground operation tool includes, between the handle part 48 and the traveling machine body 2, a locking mechanism 63 that restricts the downward turning of the arm part 47 and the forward turning of the handle part 48 when the depressing force is applied to the handle part 48 in the storage attitude.

Description

  The present invention relates to a ground operating tool in a riding type traveling vehicle such as a riding type rice transplanter.

  2. Description of the Related Art A passenger-type traveling vehicle including a ground operating tool for performing a traveling operation from outside the vehicle when crossing a ridge is known. For example, the riding type rice transplanter disclosed in Patent Document 1 includes a ground operating tool at the front end of the traveling machine body, and the clutch mechanism is engaged and braked in response to a downward rotation of the ground operating tool outside the vehicle. The brake is released from the mechanism and the traveling machine body is made to travel.

  In order to reduce the operation load of the ground operating tool, it is necessary to increase the distance from the rotation fulcrum of the ground operating tool to the operating position. However, if the ground operating tool is extended forward, the ground operating tool is However, when the ground operating tool is extended upward, the ground operating tool protrudes largely upward from the bonnet and obstructs the front view.

  Therefore, in Patent Document 1, the ground operating tool can be freely transformed into a storage posture (storage posture) standing near the front end of the traveling machine body and an operation preparation posture (working posture) drawn forward from the storage posture. In the operation preparation posture, it is possible to rotate downward. In this way, the ground operating tool can be stored compactly when not in use, and the ground operating tool can be pulled forward when in use, thereby extending the distance from the rotation fulcrum to the operating position and reducing the operating load. it can.

JP 2006-166818 A

  However, since the ground operating tool of Patent Document 1 is configured to be slidable in the front-rear direction so as to be pulled out from the storage position to the front operation preparation position, not only the structure becomes complicated but also the slide operation and rotation There was a risk that the operation would become complicated due to the combination with the operation.

  The present invention was created with the object of solving these problems in view of the above-mentioned circumstances, and includes a clutch mechanism that transmits a driving force to a wheel of a traveling machine body and transmits the driving force freely, and rotation of the wheel. The brake mechanism for braking and the front part of the traveling machine body are provided so as to be pivotable up and down. The clutch mechanism is engaged and the brake mechanism is released in response to a downward pivoting operation outside the vehicle. A riding-type traveling vehicle including a ground operating tool that travels the airframe, wherein the ground operating tool includes a vertically movable arm portion that extends forward from a rotational fulcrum position of the rotational operation, and the arm. A pair of left and right handle portions that are connected to the front end portion of the vehicle portion so as to be pivotable back and forth, and the ground operating tool includes a storage posture in which the handle portion stands along the front end portion of the traveling machine body, and the handle portion. In accordance with the operation preparation posture rotated forward from the storage posture and the operation of pushing down the handle portion in the operation preparation posture, the arm portion can be transformed into a traveling operation posture rotated downward, and When a push-down force is acting on the handle portion in the stowed position between the handle portion and the traveling machine body, the arm portion is restricted from rotating downward and the handle portion rotating forward. A locking mechanism is provided.

  According to the first aspect of the present invention, since the handle portion of the ground operating tool is transformed into the operation preparation posture by the rotation operation from the storage posture to the front, the slide structure is not required and the structure can be simplified. In addition, the operability can be improved by unifying only the rotation operation. Moreover, between the handle portion and the traveling machine body, a lock mechanism that restricts the downward rotation of the arm portion and the forward rotation of the handle portion when a pressing force is applied to the handle portion in the storage position. Therefore, it is possible to avoid as much as possible the rotation of the ground operating tool other than when operating the ground operating tool for the purpose of driving operation outside the vehicle. Not only can an erroneous operation be prevented, but also the handle can be used as a handrail when the operator gets on and off the front of the aircraft.

It is a whole side view of a riding type rice transplanter. It is a top view which shows a ground operating tool (a locking mechanism and the step for front boarding / alighting are abbreviate | omitted), a travel stop pedal, and a ground operating tool linkage mechanism. It is a side view which shows a ground operating tool (a step for front side getting on / off is omitted), a travel stop pedal, and a ground operating tool linkage mechanism. It is a principal part top view of the traveling body which shows arrangement | positioning of a ground operating tool. It is a principal part front view of the traveling body which shows arrangement | positioning of a ground operating tool, and a locking mechanism. It is a principal part side view of the traveling body which shows arrangement | positioning and a locking mechanism of a ground operating tool. It is a principal part perspective view of the traveling body which shows arrangement | positioning and a locking mechanism of a ground operating tool.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a riding type rice transplanter (passenger type traveling vehicle). The riding type rice transplanter 1 includes a traveling machine body 2 and a planting unit connected to a rear portion of the traveling machine body 2 via a lifting link mechanism 3. The auxiliary work machine 4 is provided.

  The traveling machine body 2 includes an engine mounting portion 5 on which an engine is mounted, a transmission case 6 for shifting engine power, an operation portion 7 on which an operator gets on, a front wheel 8 that also serves as a steering wheel and a driving wheel, a rear wheel 9 that is a driving wheel, and the like. Is provided with a ground operating tool 10 at the front end of the fuselage for performing a traveling operation from the outside of the vehicle, such as over the heel.

  As shown in FIG. 2, engine power is input to a main transmission mechanism 12 formed of an HST (hydrostatic continuously variable transmission) via a belt tension type clutch mechanism 11. The engine power input to the main transmission mechanism 12 is continuously variable within the main transmission mechanism 12 and input to the mission case 6.

  Although not shown in the figure, the transmission case 6 includes a planting power transmission path through which an inter-shaft transmission mechanism, a torque limiter, a planting clutch and the like are interposed, an auxiliary transmission mechanism, a brake mechanism 13 (see FIG. 3), and the like. A traveling power transmission path is provided. The brake mechanism 13 is operated simultaneously with the clutch mechanism 11 to brake the front wheels 8 and the rear wheels 9.

  As shown in FIGS. 1 to 3, the operation unit 7 includes a driver seat 14 on which an operator sits, a steering handle 16 that steers the front wheels 8 via the pitman arm 15, and a main transmission lever 17 that performs a shift operation of the main transmission mechanism 12. A machine body stop pedal 18 for simultaneously operating the clutch mechanism 11 and the brake mechanism 13 is disposed.

  As shown in FIGS. 2 and 3, the airframe stop pedal 18 can be stepped on by a vertical rotation with the pedal shaft 18 a as a fulcrum. Arms 19 and 20 that rotate back and forth in response to the depressing operation of the airframe stop pedal 18 are provided at both left and right ends of the pedal shaft 18a. The right arm 19 is connected to a spring 21 that urges the airframe stop pedal 18 upward, and is connected to a later-described linkage arm 23 via a rod 22.

  The left arm 20 is connected to a shaft 26 via a rod 24 and an arm 25, and the arms 27 and 28 provided on the shaft 26 are turned up and down in response to a stepping operation of the body stop pedal 18. One arm 27 is connected to a tension arm 32 of the clutch mechanism 11 via a roller 29, an arm 30 and a shaft 31, and switches the clutch mechanism 11 to a disengaged state in response to a depression operation of the airframe stop pedal 18. The other arm 28 is connected to the brake mechanism 13 via a rod 33, and switches the brake mechanism 13 to a braking state in accordance with the depression operation of the airframe stop pedal 18.

  A linkage operation tool 34 that also serves as a parking brake operation tool is disposed at a position near the front of the machine body stop pedal 18. The linkage operation tool 34 is a lever member that is allowed to perform a forward / backward rotation operation with the first lever support shaft 35 as a fulcrum and a left / right rotation operation with the second lever support shaft 36 as a fulcrum. It is being urged towards. The operation direction and the operation position of the linkage operation tool 34 are defined by a L-shaped lever guide groove 38a formed in the lever guide 38, and the linkage release position, which is the front end of the lever guide groove 38a, and the lever guide It can be operated to the linkage position which is the rear end (right end) of the groove 38a.

  The base of the linkage operation tool 34 is provided with a pedal linkage mechanism 40 that rotates the hook-like linkage plate 39 up and down in accordance with the operation of the linkage operation tool 34. When the operation tool 34 is operated to the linkage position, the linkage plate 39 engages with the linkage arm 23 described above. As a result, the airframe stop pedal 18 is held in the depression operation posture and the parking brake state is set.

  The ground operating tool 10 is selectively linked to the travel stop pedal operating system via the ground operating tool linkage mechanism 45. In the state linked to the travel stop pedal operation system, the clutch mechanism 11 and the brake mechanism 13 can be operated by the ground operating tool 10. The ground operating tool 10 is provided at the front part of the machine body so as to be movable up and down, and is urged toward the upper operation position. At the upper operation position, the aircraft is stopped from traveling. Is linked to the travel stop pedal operation system. Hereinafter, specific configurations of the ground operating tool 10 and the ground operating tool linkage mechanism 45 will be described.

  The ground operating tool 10 extends forward from the rotation fulcrum portion 46 and can be turned up and down with the rotation fulcrum portion 46 as a fulcrum. And a pair of left and right handle portions 48 extending to the left and a spring 49 for urging the arm portion 47 upward. In the present embodiment, the pair of left and right handle portions 48 are configured as a single member having a U-shape when viewed from the front, but the pair of left and right handle portions 48 may be configured as separate members.

  The ground operating tool linkage mechanism 45 is configured by using the parking brake mechanism described above, and the ground operating tool 10 is linked to the travel stop pedal operating system in accordance with the linkage operation of the linkage operating tool 34. The clutch mechanism 11 and the brake mechanism 13 can be operated.

  If demonstrating it concretely, the ground operation tool linkage mechanism 45 of this embodiment is provided with the pipe shaft 50 which can rotate along the left-right direction. The right end portion of the pipe shaft 50 is linked to the pedal linkage mechanism 40, while the left end portion of the pipe shaft 50 is integrally connected to the rotation fulcrum portion 46 of the ground operating tool 10.

  That is, when the ground operating tool 10 is operated downward in the parking brake state, the linkage plate 39 and the linkage arm 23 are pushed backward via the pedal linkage mechanism 40, and the rod 22 moves backward. As a result, the machine body stop pedal 18 rotates upward, so that the clutch mechanism 11 is engaged, the brake mechanism 13 is released, and the traveling machine body 2 starts to travel.

  In addition, the traveling machine body 2 of the present embodiment includes a steering linkage mechanism 51 that locks the steering handle 16 in a straight position in accordance with the linkage operation of the linkage operation tool 34. The steering linkage mechanism 51 includes a shaft 52 that rotates concentrically with the pipe shaft 50, and the right end portion of the shaft 52 is linked to the linkage operation tool 34 via an arm 53 and the like, A steering lock bar 54 extending in front of the pitman arm 15 is integrally provided at the left end.

  That is, when the linkage operating tool 34 is operated to the linkage position, the steering lock bar 54 abuts against the front end portion of the pitman arm 15 in a resilient manner as the shaft 52 rotates. When the steering handle 16 is in the rectilinear position, the steering lock bar 54 is engaged with the engaging groove of the pitman arm 15, and the steering handle 16 is locked in the rectilinear position.

  Next, the structure and arrangement of the ground operating tool 10, which is the main part of the present invention, will be described in detail with reference to FIGS.

  As shown in these drawings, the ground operating tool 10 according to the embodiment of the present invention includes an arm portion 47 that can be turned up and down with a turning fulcrum portion 46 as a fulcrum, and an upward extending from the front end portion of the arm portion 47. In providing the pair of left and right handle portions 48 to be brought out, the handle portion 48 is connected to the front end portion of the arm portion 47 so as to be rotatable in the front-rear direction. As a result, the ground operating tool 10 has a storage posture (substantially vertical posture) in which the handle portion 48 stands along the front end portion of the traveling machine body 2, and the handle portion 48 rotates forward from the storage posture around the rotation fulcrum 55. It is possible to transform into a travel operation posture in which the arm portion 47 is rotated downward in response to the operation preparation posture that has been moved (approximately 25 ° forward tilting posture) and a push-down operation of the handle portion 48 in the operation preparation posture. It becomes.

  According to the ground operation tool 10 configured as described above, the handle portion 48 is stored compactly along the front end of the fuselage when not in use, and is rotated by rotating the handle portion 48 forward when in use. The distance L from the fulcrum part 46 to the operation position (grip part 48a) can be extended to reduce the operation load, and the distance L can be extended by a turning operation, thus eliminating the need for a slide structure and simplifying the structure. In addition, the operation of the ground operating tool 10 can be unified only by turning to improve operability.

  Incidentally, in this embodiment, a pair of left and right plates 56 and 57 are welded to the front end portion of the arm portion 47 and the lower end portion of the handle portion 48, respectively, and the plates 56 and 57 are connected to each other via a rotation fulcrum 55 made of bolts. While being rotatably connected, the rotation range of the handle portion 48 is restricted by the contact between the arm portion 47 and the handle portion 48 and the contact between the plates 56 and 57.

  By the way, a front grill 59 provided with a headlight 58 and the like, a bonnet 60 covering the upper part of the engine mounting part 5, and the engine mounting part 5 are stretched to the left and right at the front end portion of the machine body where the handle 48 of the ground operating tool 10 is provided. There are a front step 61 to be taken out, a center mascot 62 extending upward from the front end portion of the bonnet 60, etc., and it is necessary to arrange the handle portion 48 of the ground operating tool 10 while avoiding interference with these parts and parts. .

  Therefore, as shown in FIGS. 4 to 7, when the handle portion 48 in the stowed position is viewed from the front side of the aircraft, it is detoured so as to hold the bonnet 60 of the traveling aircraft 2 from the left and right, and viewed from the side of the aircraft. The bonnet 60 is disposed behind the front end. In this way, it is possible not only to avoid an increase in the overall length of the airframe due to the ground operating tool 10, but also to easily cope with a design change such as extending the bonnet 60 forward as the size of the mounted engine increases. .

  Incidentally, in this embodiment, the front end of the front step 61 is set back behind the front end position of the bonnet 60, and the handle portion 48 is raised from the space secured by the set back. This is also effective for a riding type traveling vehicle without step 61. Moreover, although the handle part 48 of this embodiment is provided with the grip part 48a bent inwardly in the right-and-left upper end part, the shape of the grip part 48a can be changed arbitrarily.

  Further, as shown in FIGS. 5 to 7, when a pressing force is acting on the handle portion 48 in the stowed position between the handle portion 48 and the traveling machine body 2, the arm portion 47 is rotated downward. In addition, a lock mechanism 63 that restricts the forward rotation of the handle portion 48 is provided. For example, the lock mechanism 63 according to the present embodiment includes a front U-shaped lock arm 64 provided at the front end of the machine body, and a reverse U-shaped lock arm 64 that protrudes obliquely upward and rearward from a position near the rotation fulcrum of the handle part 48. And a hook-like engagement support member 66 projecting forward from the frame 65. When the handle portion 48 is in the stowed position, the lock arm 64 is viewed from above with respect to the engagement support member 66. It is configured to engage.

  When the handle portion 48 is in the retracted position and no push-down force is applied to the handle portion 48, the lock arm 64 is engaged with the engagement support member 66 from above, but the handle When a forward turning operation force is applied to the portion 48, the arm portion 47 is turned upward in the range of play so that the lock arm 64 gets over the distal end engaging portion 66a of the engaging support member 66. The part 48 is allowed to rotate forward, and the arm part 47 is also allowed to rotate downward.

  On the other hand, the lock arm 64 is engaged with the engagement support member 66 from above in a pressing state in a state where the handle portion 48 is positioned in the storage position and a pressing force is applied to the handle portion 48. Therefore, even if a forward turning operation force is applied to the handle portion 48, the lock arm 64 does not get over the distal end engaging portion 66a of the engagement support member 66, and the handle portion 48 is turned forward and The downward rotation of the arm portion 47 is restricted.

  According to such a lock mechanism 63, it is possible to avoid as much as possible the rotation of the ground operating tool 10 as much as possible other than during the operation of the ground operating tool 10 for the purpose of running operation outside the vehicle. Not only can the erroneous operation of the ground operating tool 10 be prevented, but also the handle 48 can be used as a handrail when the operator gets on and off the front side of the aircraft.

  Furthermore, in this embodiment, the step 67 for front boarding / alighting is installed using the ground operating tool 10. The front getting on / off step 67 is a step that becomes a footrest when the operator gets on and off from the front side of the machine body, and is provided integrally with the right side plate 57 of the handle portion 48 via a step support member 68. Accordingly, the front getting-on / off step 67 is located on the right side of the ground operating tool 10 in the plan view and in front of the right front step 61, and in the front view so as to be located below the right front step 61. Installed. 5 and 7 is a reinforcing member that integrally connects the intermediate portion of the step support member 68 and the lower end portion of the right handle portion 48.

  According to such front-side getting-on / off step 67, it becomes possible to install the footrest part when the operator gets on and off from the front side of the aircraft using the ground operating tool 10, and the handle part 48 is used as a handrail. By using it, it is possible to further improve the boarding / exiting ability when the operator gets on / off the vehicle from the front side.

  According to the present embodiment configured as described, the clutch mechanism 11 that transmits the driving force to the wheels 8 and 9 of the traveling machine body 2 to transmit freely, the brake mechanism 13 that brakes the rotation of the wheels 8 and 9, A ground operating tool that is provided at the front of the machine body 2 so as to be rotatable up and down, and that causes the traveling machine body 2 to travel by turning on the clutch mechanism 11 and releasing the brake mechanism 13 in response to a downward rotation operation outside the vehicle. 10, the ground operating tool 10 includes an arm portion 47 that can be rotated up and down from a rotation fulcrum position of the rotation operation, and a front end portion of the arm portion 47. The ground operating tool 10 includes a storage posture in which the handle portion 48 stands along the front end portion of the traveling machine body 2, and the handle portion 48 from the storage posture. Maneuvered forward Since the arm portion 47 can be transformed into a traveling operation posture in which the arm portion 47 is rotated downward in accordance with the push-down operation of the handle portion 48 in the operation preparation posture, the slide structure is not required and the structure can be simplified. Not only can it be achieved, it is possible to improve operability by unifying only the turning operation.

  In addition, when a pressing force is applied to the handle portion 48 in the stowed position between the handle portion 48 and the traveling machine body 2, the arm portion 47 rotates downward and the handle portion 48 rotates forward. Since the lock mechanism 63 that restricts the movement is provided, it is possible to avoid the rotation of the ground operating tool 10 as much as possible other than during the operation of the ground operating tool 10 for the purpose of running operation outside the vehicle. As a result, not only erroneous operation of the ground operating tool 10 can be prevented, but also the handle portion 48 can be used as a handrail when the operator gets on and off from the front side of the aircraft.

DESCRIPTION OF SYMBOLS 1 Riding type rice transplanter 2 Traveling machine body 8 Front wheel 9 Rear wheel 10 Ground operating tool 11 Clutch mechanism 13 Brake mechanism 18 Airframe stop pedal 34 Linking operating tool 45 Ground operating tool link mechanism 46 Rotation fulcrum part 47 Arm part 48 Handle part 48a Grip 55 Rotating fulcrum 63 Lock mechanism 64 Lock arm 66 Engagement support member 67 Step for getting on and off the front side

Claims (1)

A clutch mechanism for transmitting the driving force to the wheels of the traveling machine body,
A brake mechanism for braking the rotation of the wheel;
A ground operation that is provided at the front portion of the traveling machine body so as to be pivotable up and down, and that engages the clutch mechanism and releases the brake mechanism in response to a downward rotation operation outside the vehicle, and causes the traveling machine body to travel. A riding-type traveling vehicle comprising:
The ground operating tool is:
An up and down pivotable arm portion extending forward from the pivoting fulcrum position of the pivoting operation;
A pair of left and right handle portions connected to the front end portion of the arm portion so as to be rotatable in the front-rear direction,
The ground operating tool is:
A storage posture in which the handle portion stands along the front end of the traveling machine body; and
An operation preparation posture in which the handle portion is rotated forward from the storage posture;
In response to a push-down operation of the handle portion in the operation preparation posture, the arm portion can be transformed into a traveling operation posture rotated downward,
Further, when a pressing force is applied to the handle portion in the stowed position between the handle portion and the traveling machine body, the arm portion is rotated downward and the handle portion is rotated forward. A ground operating tool for a riding-type traveling vehicle, characterized in that a lock mechanism for restricting the vehicle is provided.

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