JP2006082674A - Handle bar folding structure in walking-type farming implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a handle bar folding structure in a walking-type farming implement capable of easily and smoothly carrying out folding and turning. <P>SOLUTION: A tiller 6 is provided on a front part of an implement body mounted with an engine 9 and a mission case 1. A turning support 20 for folding/turning forward of the handle bar 18 projecting toward a rear upper part of the implement body is placed on a position behind the engine 9 which is an upper position behind the mission case 1. When the handle bar 18 is made to be in a fallen-down posture S surrounding the outside of the engine 9 by folding/turning to the front, a front end of the steering wheel 18 is positioned behind a front end of the tiller 6. A loop part 18A of the handle bar 18 surrounding the outside of the engine 9 at the time of the fallen-down posture S is formed from a turning support part via a steep part 18B of the handle bar 18. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a handle folding structure in a walking farm machine such as a walking manager.

A rotary that is a tillage device is provided on the airframe on which a conventional engine and a transmission case are mounted, and a handle that protrudes rearward and upward from the airframe is folded forward and attached to the transmission case side so as to be freely rotatable. A tiller that is a walking type farm working machine configured to be switched to a lying posture surrounding the outside of the engine by folding forward is known (for example, see Patent Document 1). Further, a tiller provided with a tiller (rotary) in front is known (for example, see Patent Document 2).
JP 2003-146256 A JP-A-10-225205

  In the field cultivator described in Patent Document 1, the rotation fulcrum of the handle is disposed at a lower position behind the mission case. For this reason, when the handle is folded and rotated, there is a drawback that a portion near the rotation fulcrum of the handle may interfere with the engine or the transmission case side. In addition, when the handle is switched to the lying posture, the front end of the handle is positioned in front of the front end of the aircraft. For this reason, when the handle is switched to the lying posture, the total length becomes long, and there is a drawback that the handle may interfere with work when the aircraft is lifted. Even when the handle structure of Patent Document 1 is adopted in the field cultivator of Patent Document 2, there are the same disadvantages as described above.

  The handle folding structure in the walking type agricultural working machine of the present invention for solving the above-described problems is provided with a tiller device 6 on the machine body on which the engine 9 and the mission case 1 are mounted, and a handle 18 that protrudes rearward and upward of the machine body. Is attached to the transmission case 1 side so that it can be folded and rotated forward, and the handle 18 can be switched to a lying down posture S surrounding the outside of the engine 9 by folding forward. In the machine, the tilling device 6 is provided in front of the machine body, the rotation fulcrum 20 of the handle 18 is arranged at a position above the mission case 1 and behind the engine 9, and the handle in the lying position S. The first feature is that the front end of 18 is configured to be located behind the front end of the tilling device 6.

  Second, the loop portion 18A of the handle 18 that surrounds the outside of the engine 18 in the lying posture S is formed from the rotation fulcrum portion of the handle 18 via the steeply inclined portion 18B.

  Thirdly, a handle 31 for lifting the airframe is provided above the tilling device 6 so as to protrude, and the front end of the handle 18 in the lying down posture S is located behind the front end of the handle 31. It is said.

  According to the structure of the present invention configured as described above, the rotation fulcrum of the handle is disposed at a position behind the transmission case and behind the engine. The position near the rotation fulcrum of the handle is prevented from interfering with the engine or the mission case, and the handle can be folded and rotated smoothly.

  In addition, by forming the loop portion of the handle that surrounds the outside of the engine during the lying down posture through the steeply inclined portion from the rotating fulcrum portion, there is no need to increase the length of the fulcrum shaft that supports the handle, Since the frame to be attached does not expand in the left-right direction, the pivot point of the handle can be made compact.

  The handle for lifting the fuselage is projected above the tillage device, and the handle is stored in the fallen state by positioning the front end of the handle in the lying down position behind the front end of the handle. There is an effect that the handle does not hinder the work when lifting the aircraft with the handle.

  1, 2, and 3 are a side perspective view, a plan perspective view, and a front perspective view of a walking type management machine that is a field cultivator to which the present invention is applied. The mission case 1 constitutes the fuselage frame. Wheels 4 are supported on the lower rear left and right sides of the mission case 1 via axles 2, and rotary 6 that is a tilling device for tillage is supported on the lower front side.

  An engine 9 is mounted in the recess 7 at the top of the mission case 1 via an engine base 8. The engine 9 is disposed above the axle 2 so that the center of gravity is located behind the intermediate position between the rotary shaft 3 and the axle 4. The upper part of the engine 9 is covered with a bonnet 10.

  The transmission case 1 includes a transmission including a travel transmission mechanism that shifts the travel drive force for the wheels 4 and a rotary transmission mechanism that shifts the rotary drive force for the rotary 6. A driving force is transmitted from an output shaft 12 of the engine 9 to an input shaft 11 of the transmission through a main clutch including a tension clutch.

  As the main clutch is engaged, a driving force is transmitted from the engine 9 to the transmission, and the wheels 4 and the rotary 6 are rotationally driven. The mission case 1 serves as a traveling transmission case that transmits driving force from the engine 9 to the wheels 4 and a tillage transmission case that transmits driving force from the engine 9 to the rotary 6.

  A pair of left and right brackets 17L and 17R are bolted to the rear of the mission case 1 obliquely upward. The rear ends of both brackets 17L, 17R are located behind the engine 9, and the pipes 15 extending from both brackets 17L, 17R are integrally fixed to the rear ends of the brackets 17L, 17R. At both ends of the pipe 15, the inner sides of the left and right flange portions 18 </ b> L and 18 </ b> R of the handle 18 that are substantially U-shaped in a plan view and protrude obliquely rearward and upward are attached.

  The pipe 15 has a knob so that the end of the left and right flanges 18L and 18R of the handle 18 is abutted against the end of the pipe 15 so as to come out from the outside of the one flange 18R to the outside of the other flange 18L. Attached bolt 20 is inserted. A nut 25 is screwed to the end of the bolt 20 on the flange 18L side.

  By tightening the bolt 20, the inner sides of the left and right flange portions 18 </ b> L and 18 </ b> R of the handle 18 are pressed toward the end surface of the pipe 15, and the handle 18 is fixed to the pipe 15 by frictional force. A chrysanthemum seat is interposed between the end surface of the pipe 15 and the inside of the end portions of the left and right flanges 18L, 18R, and serves as a detent (prevents rotation) when the handle 18 is fixed.

  By loosening the bolt 20, the pressure on the end surface of the pipe 15 inside the ends of the left and right flanges 18L, 18R of the handle 18 is released, and the handle 18 is moved against the brackets 17L, 17R with the bolt 20 as a rotation fulcrum. It can be rotated.

  The left and right flange portions 18L and 18R of the handle 18 are bent toward the inner side in a plan view in the middle of reaching the base end side (the end portion side attached to the pipe 15). The bent ends are attached to the left and right end faces of the pipe 15 as described above. For this reason, the distance between the left and right brackets 17L, 17R is narrow, the length of the pipe 15 is short, the attachment portion of the handle 18 to the machine body is narrow and compact, and the inconvenience such as interference with the left and right wheels 4 is caused. It is prevented.

  The handle 18 is provided with a swingable clutch operating portion 19 for operating on / off of the main clutch. The driving of the wheel 4 and the rotary 6 can be turned on and off by the clutch operation unit 19.

  From the mission case 1, a main operation lever 21 that operates to drive and shift the wheels 4 and the rotary 6 protrudes rearward. The main operation lever 21 protrudes rearward through a guide hole 30 a provided in the guide panel 30. The guide panel 30 is attached to both brackets 17L and 17R.

  The main operation lever 21 can be swung back and forth and left and right along the guide hole 30a. The running speed, the driving speed of the rotary 6 and the rotational direction are changed by the swing operation of the main transmission lever 21.

  At the position between the engine 9 and the rotary 6 in the transmission case 1, both base end portions of a bowl-shaped lifting handle 31 having a substantially inverted U shape in plan view are fixed. Specifically, as shown in FIGS. 4 (a) and 4 (b), the front end sides of the left and right collar portions 31 </ b> L and 31 </ b> R of the handle 31 are connected to bosses 1 a projecting on both sides of the transmission case 1 via bolts 35. Is fixed.

  The lifting handle 31 extends forward of the machine body so as to detour above the rotary 6. An operator can easily lift the aircraft by using the pipe 15 as a rear handle and the lifting handle 31 as a front handle.

  A bracket 22 is bolted to the front end portion of the mission case 1. An arm 24 is pivotally supported on the bracket 22 so as to swing up and down. A front elevating wheel 23 is pivotally supported at the tip end side of the arm 24 so as to be freely rotatable. A left and right channel frame 32 is integrally fixed to the upper end portion of the bracket 22 by welding or the like.

  As shown in FIGS. 4A and 4B, the left and right flange portions 31L and 31R of the lifting handle 31 are integrally fixed to the left and right end portions of the channel frame 32 by welding or the like. As a result, the bracket 22 and the lifting handle 31 are integrally fixed, and both the bracket 22 and the lifting handle 31 are fixed to the transmission case 1 stably and firmly. Since the lifting handle 31 is firmly fixed to the body side, the lifting operation of the body can be easily and stably performed.

  The upper part of the rotary 6 is covered with a cover 26. The front end side of the cover 26 is integrally fixed to the upper surface side of the channel frame 32 by bolts 36 and nuts 37. A hook portion 38 having a U-shaped cross section on the left and right is integrally formed on the inner surface side of the cover 26. The hook portion 38 is fitted into the left and right flange portions 31L and 31R of the handle 31.

  As described above, the cover 26 is attached to the lifting handle 31 side directly or via the channel frame 32, and the lifting handle 31 is a frame of the cover 26. As a result, the lifting handle 31 also serves as the frame of the cover 26, thereby reducing the cost. Since the lifting handle 31 is firmly fixed to the transmission case 1 as described above, the cover 26 using the lifting handle 31 as a frame is also firmly and stably attached to the transmission case 1 side.

  The walking type management machine is configured as described above, and the wheel 4 is grounded, and the operator holds the handle 18, operates the engine 9, enters the main clutch, and operates the rear wheel 4. The machine body travels by driving and the tillage work is performed by the rotary 6 that rotates as the machine body travels.

  The aircraft travels while the wheel 4 and the front lifting wheel 23 are in contact with the ground. Since the positional relationship between the wheel 4 and the rotary 6 is fixed, the tillage depth is determined by the amount of the rotary 6 protruding downward from the straight line E connecting the ground point of the wheel 4 and the ground point of the front lifting wheel 23. Therefore, the tilling depth is set and adjusted by swinging the arm 24 and setting the height position of the front lifting wheel 23.

  Further, as shown in FIG. 1, by setting the height position of the front elevating wheel 23 so that the rotary 6 does not protrude below the straight line E connecting the grounding point of the wheel 4 and the grounding point of the front elevating wheel 23. The body can be easily moved by the wheel 4 and the front lifting wheel 23 without touching the rotary 6 to the ground.

  As described above, the handle 18 can be rotated back and forth using the bolt 20 as a rotation fulcrum. The handle 18 can be switched to a lying posture S surrounding the outside of the engine 9 by turning forward. That is, the left and right flange portions 18L and 18R of the handle 18 have a wider interval than the width of the engine 9 in a portion overlapping the engine 9 in a side view when the handle 18 is in the lying posture S. Bending is started from a portion corresponding to.

  The handle 18 forms a loop portion 18A by a portion having a space wider than the width of the engine 9 of both the left and right flange portions 18L, 18R and a connecting flange portion 18C that connects the both flange portions 18L, 18R. The handle 18 surrounds the outside of the engine 9 in the lying posture S by the loop portion 18A. From the bending start portion to the end portion of the left and right flange portions 18L, 18R form a steeply inclined portion 18B from the bolt 20 (attachment rotation fulcrum portion on the machine body side). It can be said that the loop portion 18A is formed via the steeply inclined portion 18B.

  The handle 18 forms a loop portion 18 </ b> A so that the connecting collar 18 </ b> C is positioned behind the front end position of the rotary 6 and the front end position of the lifting handle 31 in the lying posture S. Accordingly, there is no inconvenience that the handle 18 protrudes forward of the aircraft and the overall length of the aircraft becomes long when the handle 18 is in the lying posture S.

  And since the handle | steering-wheel 18 rotates by using the volt | bolt 20 inserted in the pipe 15 as a fulcrum, the handle 18 does not exist above the pipe 15 used as a rear handle by using the lying down posture S. Further, the connecting collar portion 18 </ b> C is positioned behind the front end position of the lifting handle 31 during the lying posture S. As a result, the handle 18 is stored between the front and rear handles (the pipe 15 and the lifting handle 31) in the lying posture S.

  For this reason, when lifting the aircraft, the pipe 15 that is the rear handle can be easily grasped, and the handle 18 in the lying posture S is not prevented from gripping the lifting handle 31 that is the front handle. As a result, the operator can easily grasp the both-hands and can easily lift the aircraft.

  Further, since the rotation fulcrum of the handle 18 is located behind the engine 9 and at an upper position behind the mission case 1, when the handle 18 is in the lying down posture S, the handle 18 is more than the mission case 1. There is no inconvenience of being located above and interfering with the mission case 1.

  Since the steeply inclined portion 18B of the handle 18 is located behind the engine 9, the handle 18 does not interfere with the engine 9 when the handle 18 is rotated. As described above, when the handle 18 is folded and rotated, the handle 18 does not interfere with the engine 9 and the transmission case 1, and the operator can easily and smoothly handle the handle 18 without being aware of the interference with the engine 9 and the transmission case 1. Can be rotated.

It is a side perspective view of a walk type management machine. It is a plane perspective view of a walk type management machine. It is a front perspective view of a walk type management machine. (A) is a side view of a cover part, (b) is a front view of a cover part.

Explanation of symbols

1 Mission case 6 Rotary (cultivation equipment)
9 Engine 18 Handle 18A Handle loop 18B Steep slope 20 Handle bolt with knob (turning fulcrum)
31 Lifting handle (handle)
S Lodging posture

Claims (3)

  The tiller device (6) is provided on the machine body on which the engine (9) and the mission case (1) are mounted, and the handle (18) protruding toward the rear upper side of the machine body is folded forward and turned freely. (1) In a walk-type agricultural machine configured to be attached to the side and configured so that the handle (18) can be switched to a lying down posture (S) surrounding the outside of the engine (9) by folding forward and backward. The device (6) is provided in front of the fuselage, and the rotation fulcrum (20) of the handle (18) is arranged at a position behind the transmission case (1) and behind the engine (9). The handle folding structure in the walking type farm working machine configured such that the front end of the handle (18) is located behind the front end of the tilling device (6) in the lying posture (S).   The loop portion (18A) of the handle (18) surrounding the outside of the engine (18) in the lying down posture (S) is formed from the rotation fulcrum portion of the handle (18) via the steeply inclined portion (18B). Handle folding structure of the walking type farming machine.   A handle (31) for lifting the fuselage is provided above the tillage device (6) so that the front end of the handle (18) in the lying down position (S) is behind the front end of the handle (31). The handle folding structure in the walking type agricultural working machine according to claim 1 or 2, which is located at the position.

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