WO2013168234A1

WO2013168234A1 - Walking type farm implement

Info

Publication number: WO2013168234A1
Application number: PCT/JP2012/061768
Authority: WO
Inventors: 忠司近藤
Original assignee: ヤンマー株式会社
Priority date: 2012-05-08
Filing date: 2012-05-08
Publication date: 2013-11-14
Also published as: KR20150004801A; CN104244699A

Abstract

The purpose of the present invention is to provide a walking type farm implement (1) that takes into consideration durability, weatherability, and operation responsiveness while making the handle height of operating handles (30) adjustable according to the physique and operating posture of an operator. This walking type farm implement (1) is provided, on the rear part of an implement body (2), with operating handles (30) that have left and right grip parts (31). An operating panel body (22) is attached in a fixed position to the upper part of a frame body (21) established at the rear of the implement body (2), and the operating handles (30) are provided on the frame body (21) so as not to rotate with the operating panel body (22) and so as to be able to move up and down and rotate separately and independently of the operating panel body (22).

Description

Walking type agricultural machine

The present invention relates to a walking-type agricultural machine that is operated while grasping the left and right grips of the steering handle provided at the rear of the aircraft with both hands.

Conventionally, in walking-type farm work such as walking-type rice transplanters and management machines, the left and right grips of the steering handle provided at the rear of the aircraft are gripped with both hands, and the aircraft is operated while balancing the aircraft. This type of operating tool is provided around the steering handle so that the clutch operating system operating tools such as the main clutch lever, the planting clutch lever, and the side clutch lever can be operated without releasing both hands from the grip ( For example, see Patent Documents 1 and 2).

The steering handle of the walking type rice transplanter described in Patent Document 1 is formed in a bifurcated shape in plan view from the base end side to the tip end side. The left and right tip portions divided into two forks are each configured as a grip portion. An operation panel body is provided on the proximal end side of the steering handle. And the main clutch lever (finger operation lever) and the side clutch lever are provided in the grip part side of the steering handle. A planting clutch lever is provided on the operation panel body side. An elevator lever for raising and lowering the machine body is also provided on the operation panel body side.

The steering handle of the walking type rice transplanter described in Patent Document 2 is also in a bifurcated form similar to that of Patent Document 1, and an operation panel body is provided on the base end side. There are three main clutch levers, planting clutch levers, and side clutch levers on the grip side of the steering handle. A lift lever is provided on the operation panel body side.

JP-A-6-78608 JP-A-6-269207

By the way, in this kind of walk-type farm work machine, the technique of turning the steering handle up and down (tilt turning) according to the physique and steering posture of the operator and adjusting the handle height (the bending angle of the steering handle) is also good. Are known. When the handle height is adjusted, the distance (positional relationship) from each operation lever to the clutch that is the operation target changes. Accordingly, when interlocking the operation lever and the clutch to be operated, it is common to use a wire that is elastically deformable (allowing the distance) instead of a link mechanism composed of a rod, an arm, or the like. It is. Also in the walking type agricultural working machine of

patent documents

1 and 2, a wire is frequently used for connection with each operation lever and the clutch which is the operation object.

However, the wire for operating force transmission is disadvantageous in terms of durability and weather resistance compared with the link mechanism in view of the working environment of the walking type agricultural machine, and the stroke loss due to the bending or bending of the wire. There is also a problem that it tends to occur. For this reason, the conventional walking type farm work machines such as

Patent Documents

1 and 2 use a lot of wires, and there is still room for improvement in terms of durability, weather resistance, steering response, and the like. I can say that.

The present invention has been made in view of the current situation as described above, and it is possible to adjust the handle height of the steering handle in accordance with the physique and the steering posture of the operator, while maintaining durability, weather resistance, and steering response. The technical challenge is to provide walking-type agricultural machines that take into account the above.

The invention of claim 1 is a walking type agricultural working machine having a steering handle having left and right grips at the rear part of the machine body, wherein the operation panel body is located above the frame body standing upright at the rear part of the machine body It is fixedly attached, and the steering handle is provided on the frame body so as to be rotatable up and down independently of the operation panel body so as not to rotate together with the operation panel body. It is.

According to a second aspect of the present invention, in the walking type agricultural working machine according to the first aspect, a power source mounted on the airframe, a pair of left and right wheels supporting the airframe, and power from the power source to the wheels. A pair of side clutches for connecting and disconnecting transmission, and left and right side clutch operating tools connected to the side clutches via a rope member are arranged at the grip portions of the steering handle. Is.

According to a third aspect of the present invention, in the walking type agricultural working machine according to the first or second aspect, the rear end portions of the grip portions are moved forward by rotating the steering handle upward or downward. It is said that it is comprised.

According to the present invention, a walking type agricultural working machine having a steering handle having left and right grips at the rear part of the machine body, the operation panel body being fixed in position on the upper part of the frame body erected at the rear part of the machine body Since the steering handle is provided on the frame body so as to be rotatable up and down independently of the operation panel body so as not to rotate together with the operation panel body, the operation Without moving the panel body at all, only the steering handle can be turned up and down independently (tilt rotation) in accordance with the physique and steering posture of the pilot. For this reason, if an operation tool for a speed change operation system or a clutch operation system is arranged as close as possible to the operation panel body side, for example, a link mechanism can be employed to link each operation tool and its operation target member. Problems such as durability, weather resistance, and stroke loss due to this can be eliminated as much as possible.

According to the invention of claim 2, the power source mounted on the airframe, the pair of left and right wheels that support the airframe, and the pair of side clutches that interrupt power transmission from the power source to the wheels. Left and right side clutch operating tools connected to the side clutches via a rope member are arranged in the grip portions of the steering handle, so that the left and right grip portions are gripped. Naturally, each side clutch operation tool can be operated. When each side clutch operating tool and the corresponding side clutch are connected by the cable member, the height of the steering handle can be easily adjusted without deteriorating the turning maneuverability of the airframe. The connection structure of other speed change operation systems and clutch operation systems can be used as a link mechanism, for example, so that durability and weather resistance can be improved and stroke loss can be reliably reduced.

According to the invention of claim 3, since the rear end portions of the grip portions are moved forward by rotating the steering handle upward or downward, the steering handle is turned upward. The entire length of the machine body can be shortened by moving or turning downward (tilting rotation), and for example, it is easy to secure a storage space for the walking-type farm work machine when shipping / transporting from a manufacturing factory or storing in a barn etc. Become.

It is a left view of the walk type rice transplanter in an embodiment. It is a top view of a walk type rice transplanter. It is a drive system figure of a walk type rice transplanter. It is the perspective view which looked at the walking type rice transplanter from the diagonally left rear. It is a rear view which shows the support structure of a steering handle. It is an enlarged plan view of a steering handle. It is a separate perspective view which shows the attachment structure of the steering handle with respect to a frame body. It is an expansion left view of a steering handle.

Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings in the case where the embodiment is applied to a six-row type walking type rice transplanter 1 which is an example of a walking type agricultural working machine. In the following description, the left side in the traveling direction of the airframe 2 is simply referred to as the left side, and the right side in the same direction in the traveling direction is simply referred to as the right side.

(1). Outline of Walking Type Rice Transplanter First, an outline of the walking type rice transplanter 1 (hereinafter simply referred to as the rice transplanter 1) will be described with reference to FIG. 1, FIG. 2, FIG. 4 and FIG. The rice transplanter 1 of the embodiment includes an engine base 4 equipped with an engine 3 as a power source, a mission case 5 attached to the rear part of the engine base 4, and a longitudinal center frame attached to the rear part of the mission case 5. 6 is provided with a main body 2. The power of the engine 3 on the engine base 4 is transmitted to the transmission case 5 via a pulley and belt transmission system 36 (see FIG. 3).

The left and right sides of the mission case 5 are connected to a longitudinally swingable swing case 7 that can be turned up and down with the front side as a fulcrum. On the rear side of the left and right swing case 7, a drive axle 8 that protrudes outward in the left and right directions is rotatably supported. Wheels 9 are attached to the left and right drive axles 8. In the left and right swing case 7, a transmission mechanism 42 including a sprocket and a chain transmission system is accommodated. Power from the engine 3 is transmitted to the left and right drive axles 8 via the transmission case 5 and the transmission mechanism 42, and the left and right wheels 9 are driven to rotate forward and backward via the left and right drive axles 8.

Further, one end side of the side frame 10 having an L shape in plan view is attached to the left and right sides of the mission case 5. The left and right side frames 10 surround the front side and the left and right outer sides of the corresponding wheels 9. A center float 11 that provides buoyancy to the rice transplanter 1 is disposed below the machine body 2. In the left and right side frames 10, side floats 12 that impart buoyancy to the rice transplanter 1 are disposed below the front and rear frame portions that extend back and forth.

A central planting case 13C having a pair of central seedling planting mechanisms 14C is attached to the rear side of the center frame 6. Further, left and

right planting cases

13L and 13R having a pair of left and right

seedling planting mechanisms

14L and 14R are attached to the rear side of the front and rear frame portions in the left and right side frames 10, respectively. The power transmitted from the engine 3 to the transmission case 5 is also transmitted to the central planting case 13C via the transmission shaft 45 (see FIG. 3) in the center frame 6 to drive the central seedling planting mechanism 14C. The power from the transmission case 5 is also transmitted to the left and

right planting cases

13L and 13R via the transmission shaft 45 (see FIG. 3) in the left and right side frames 10 to drive the left and right

seedling planting mechanisms

14L and 14R. By the six

seedling planting mechanisms

14C, 14L, 14R, seedlings are cut one by one from a seedling mat on a seedling mount 18 to be described later and planted on the rice field.

On the rear side of the machine body 2, a rear frame 15 having a substantially C-shape in plan view surrounding the planting cases 13 C, 13 L, and 13 R is disposed. One of the left and right tip portions of the rear frame 15 is connected to the front side of the left planting case 13L, and the other is connected to the front side of the right planting case 13R. The rear portions of the left and

right planting cases

13L and 13R are connected to the horizontally long intermediate portion of the rear frame 15 via a longitudinal relay frame 16, respectively. A horizontally long support rail 17 arranged in the vertical direction is connected to the horizontally long middle portion of the rear frame 15. On the vertical support rail 17, a seedling mounting table 18 for six-row planting that is inclined in a front-rear and rear-high shape is supported so as to be capable of reciprocating left and right.

The seedling stage 18 is continuously reciprocally moved in a reciprocating manner by a lateral feed mechanism (not shown) that transmits power from the central planting case 13C. Therefore, the seedling mat placed on the seedling placing stand 18 is continuously transported in a reciprocating manner. A vertical feed mechanism (not shown) for six strips is provided on the lower side of the seedling stage 18. Every time the seedling stage 18 reaches the reciprocating end (the turning point of the reciprocating movement), the seedling mat on the seedling stage 18 is intermittently transported vertically by the vertical feed mechanism. In addition, a preliminary seedling stage 19 for placing a spare seedling mat is disposed in front of the seedling stage 18 and above the machine body 2.

The base side of the handle frame 21 is connected to the rear side of the center planting case 13C as a frame body that extends rearward and obliquely upward. The base portion of the handle frame 21 is also supported by the horizontally long middle portion of the rear frame 15. An operation panel body 22 is attached to the upper portion of the handle frame 21 in a fixed manner. The operation panel body 22 includes a main clutch lever 23 for performing a power transmission operation from the engine 5, a planting clutch lever 24 for performing a power transmission operation to the seedling planting mechanisms 14 C, 14 L, 14 R, and the body 2. An elevating lever 25 for elevating operation is provided. A main switch 26 that controls starting and stopping of the engine 3 and a choke lever 27 for increasing the fuel ratio in the air-fuel mixture when the engine 3 is started are also provided on the operation panel body 22.

A steering handle 30 having left and right grips 31 is attached to the lower side of the operation panel body 22 in the middle part of the handle frame 21 in the longitudinal direction. The steering handle 30 is formed in a U shape that is bifurcated in a plan view from the base end side to the tip end side. The left and right tip portions divided into two forks are formed in the grip portion 31. A proximal end side of the steering handle 30 is provided on the upper side of the handle frame 21 so as to be vertically rotatable (tilt rotation) (details will be described later). Side clutch levers 32 L and 32 R (side clutch operation tools) that perform transmission / reception of power transmission to the left and right wheels 9 are provided on the left and right grip 31 side of the steering handle 30. Note that an accelerator lever 33 that adjusts the number of revolutions of the engine 3 is provided on one of the left and right grip portions 31 side of the steering handle 30. The main clutch lever 23 and the planting clutch lever 24 on the operation panel body 22 side, and the left and right side

clutch levers

32L and 32R on the steering handle 30 side are the operation tools of the clutch operation system.

The pilot grasps the left and right grip 31 of the steering handle 30 with both hands from the rear side of the machine body 2 and steers the machine body 2 to move within the field while moving the seedling mount 18 and the

seedling planting mechanisms

14C, 14L, and 14R. Is driven to execute seedling planting work (rice planting work) for planting seedlings in the field. During the seedling planting operation, the operator replenishes the seedling mount 18 with the seedling mat on the spare seedling mount 19 as needed.

(2). Next, the drive structure of the rice transplanter 1 will be described with reference to FIG. As shown in FIG. 3, the power of the engine 3 on the engine stand 4 is transmitted to the transmission case 5 via a pulley and a belt transmission system 36. The pulley and belt transmission system 36 is provided with a belt tension type main clutch 37. The main clutch 37 is interlocked and connected to the main clutch lever 23 on the operation panel body 22 side behind the machine body 2 via a main clutch link mechanism 38 (see FIG. 5).

The power transmitted in the mission case 5 is branched and transmitted in two directions, the traveling transmission mechanism 39 and the inter-company transmission mechanism 40. The branch power to the travel transmission mechanism 39 is transmitted to the drive axle 8 from the left and

right side clutches

41L and 41R via the transmission mechanism 42 in the left and right swing case 7 after being shifted by the travel transmission mechanism 39, and the left and right wheels. 9 is rotated forward and backward. The left and

right side clutches

41L and 41R are linked to the left and right side

clutch levers

32L and 32R via left and right

clutch wires

43L and 43R (see FIG. 5) as rope members.

The branching power to the inter-shaft transmission mechanism 40 is shifted by the inter-shaft transmission mechanism 40, and then is planted through the planting clutch 44 and the transmission shafts 45 in the center and

side frames

6, 10, respectively. It is transmitted to the

seedling planting mechanisms

14C, 14L, 14R of 13L, 13R. The planting clutch 44 is linked to the planting clutch lever 24 on the operation panel body 22 side behind the machine body 2 via a planting clutch link mechanism 46 (see FIG. 5).

The power transmitted to the central planting case 13C is also branched and transmitted to the lateral feed mechanism 47, and the seedling stage 18 is moved laterally by the branch power. Each time the seedling stage 18 reaches the reciprocating end (return point of the reciprocating movement), the vertical feeding mechanism 48 is driven to intermittently feed the seedling mat on the seedling stage 18 intermittently.

(3). Detailed Structure of Steering Handle Next, the detailed structure of the steering handle 30 will be described with reference to FIGS. In the embodiment, the steering handle 30 is provided on the handle frame 21 so as to be rotatable up and down independently of the operation panel body 22 so as not to rotate together with the operation panel body 22.

That is, as shown in FIGS. 4 to 8, a pair of front and rear tilt stands 51 and 52 are provided below the operation panel body 22 in the longitudinal middle portion of the handle frame 21. The front and rear tilt bases 51 and 52 of the embodiment are fixed to the handle frame 21 by welding so that the handle frame 21 is sandwiched from the front and rear. On the other hand, a pair of left and right tilt plates 53 are provided on the proximal end side of the steering handle 30. The left and right tilt plates 53 of the embodiment are welded and fixed to the proximal end side of the steering handle 31 with a space in the left and right direction so as to straddle the front and rear tilt bases 51 and 52 from the front. The left and right tilt plates 53 and the front tilt base 51 are fastened by fulcrum bolts 54 from the left and right outer sides as tilt axes. The shaft portions of the left and right fulcrum bolts 54 are located on the same lateral axis. Therefore, the steering handle 30 can be rotated up and down (tilt rotation) around the left and right fulcrum bolts 54 (lateral axis).

The left and right tilt plates 53 are each formed with a substantially arc-shaped guide slot 55 having a fulcrum bolt 54 (lateral axis) as the center of curvature. The left and right tilt plates 53 are fixed to the rear tilt base 52 so as not to rotate by inserting the left and right fixing bolts 56 into the guide groove holes 55 and screwing them into the rear tilt base 52. As a result, the steering handle 30 is held in a locked state in which the steering handle 30 cannot rotate up and down (the vertical rotation position (tilt position) of the steering handle 30 is determined).

As described above, since the operation panel body 22 is fixedly attached to the upper portion of the handle frame 21, the operation panel body 22 is not moved at all, and only the operation handle 30 is adjusted according to the physique and operation posture of the operator. It is possible to rotate up and down (tilt rotation) independently. For this reason, if the operation tools (the main clutch lever 23, the planting clutch lever 24, the lifting lever 25, etc.) of the clutch operation system and the speed change operation system are arranged on the operation panel body 22 side as much as possible, When interlocking the

clutches

37 and 44 and the hydraulic switching valve, for example, link

mechanisms

38, 46 and 49 can be employed, and problems such as durability, weather resistance and stroke loss due to the wire connection are eliminated as much as possible. Is possible.

The vertical rotation of the steering handle 30 around the left and right fulcrum bolts 54 is achieved by loosening the left and right fixing bolts and moving their shafts relatively along the guide groove holes 55 of the left and right tilt plates 53. Allowed within the range of arc length. That is, the vertical rotation stroke of the steering handle 30 is regulated by the shaft portions of the left and right fixing bolts 56 coming into contact with both ends of the guide slot 55 in the longitudinal direction.

As shown in FIG. 8, the steering handle 30 is configured such that the rear end portions of the grip portions 31 are moved forward by rotating upward or downward. In the embodiment, when the steering handle is turned upward around the left and right fulcrum bolts, a structure is employed in which the rear end portions of the left and right grip portions 31 are moved forward. With this configuration, the entire length of the airframe 2 can be shortened by rotating the steering handle 30 upward or downward (tilt rotation). For example, when shipping or transporting from a manufacturing factory or storing in a barn, etc. It becomes easy to secure the storage space of the machine 1.

As described above, the main clutch lever 23 and the planting clutch lever 24 on the operation panel body 22 side are linked to the

operation target clutches

37 and 44 via the

link mechanisms

38 and 46, respectively. Further, the lifting lever 25 can also be switched via a lever link mechanism 49 (see FIG. 5) to a hydraulic pressure switching valve (not shown) for a hydraulic actuator that moves the machine body 2 up and down by rotating the left and right swing case 7 up and down. It is linked to. On the other hand, the side

clutch levers

32L and 32R on the left and right grip part 31 side of the steering handle 30 are interlocked and connected to the left and

right side clutches

41L and 41R via the left and right

clutch wires

43L and 43R (see FIG. 5) as rope members. ing. If comprised in this way, the left-right side

clutch lever

32L, 32R can be operated naturally in the state which grasped the right-and-left grip part 31. If the left and right side

clutch levers

32L and 32R and the corresponding left and

right side clutches

41L and 41R are connected by the left and right

clutch wires

43L and 43R, the handle height of the steering handle 30 is reduced without reducing the turning maneuverability of the airframe 2. Easy adjustment. In addition, for example, link

mechanisms

38, 46, and 49 can be used for the connection structure of other speed change operation systems and clutch operation systems, so that durability and weather resistance can be improved and stroke loss can be reliably reduced.

(4). Summary According to the above embodiment, the walking-type agricultural machine 1 includes the steering handle 30 having the left and right grips 31 at the rear part of the body 2, and the frame body 21 erected at the rear part of the body 2. An operation panel body 22 is fixedly attached to the upper portion, and the frame body 21 is independent of the operation panel body 22 so that the steering handle 30 does not rotate together with the operation panel body 22. Since the operation panel body 22 is not moved at all, only the operation handle 30 can be independently rotated up and down (tilt rotation) according to the physique and operation posture of the operator. . Therefore, if the operation tools 23 to 25 of the clutch operation system and the speed change operation system are arranged on the operation panel body 22 side as much as possible, the operation tools 23 to 25 and the

operation target members

37 and 44 are linked and connected. For example, link

mechanisms

38, 46, and 49 can be employed, and problems such as durability, weather resistance, and stroke loss due to wire connection can be eliminated as much as possible.

According to the invention of claim 2, the power source 3 mounted on the body 2, the pair of left and right wheels 9 that support the body 2, and the power transmission from the power source 3 to the wheels 9 are interrupted. A pair of

side clutches

41L and 41R are provided, and left and right side

clutch operating tools

32L and 32R connected to the

side clutches

41L and 41R via the

rope members

43L and 43R are provided on the steering handle 30, respectively. Since the grip portion 31 is disposed, the side

clutch operating tools

32L and 32R can be operated naturally while the left and right grip portions 31 are gripped. It is sufficient to connect the side

clutch operating tools

32L and 32R and the

corresponding side clutches

41L and 41R with the

rope members

43L and 43R, without reducing the turning maneuverability of the airframe 2. Further, the height of the steering handle 30 can be easily adjusted, and the connecting structure of other speed change operation systems and clutch operation systems is made, for example, link

mechanisms

38, 46, 49 to improve the durability and weather resistance, and the straw It is possible to reliably reduce the cross.

According to the invention of claim 3, the rear end portion of the grip portions 31 is configured to move forward by rotating the steering handle 30 upward or downward. Can be rotated upward or downward (tilt rotation) to shorten the overall length of the machine body 2. For example, the storage space for the walking-type agricultural machine 1 can be shortened when shipping or transporting from a manufacturing factory or when storing in a barn or the like. It becomes easy to secure.

(5). Others The present invention is not limited to the above-described embodiment, and can be embodied in various forms. For example, the present invention is not limited to a walking type rice transplanter, but can also be applied to a walking type management machine or a tiller. The configuration of each part is not limited to the illustrated embodiment, and various modifications can be made without departing from the spirit of the present invention.

1 walking rice transplanter (walking farm equipment)
2 Airframe 3 Engine (Power source)
4 Engine stand 5 Mission case 9 Wheel 21 Handle frame (frame body)
22 Operation panel body 23 Main clutch lever 24 Planting clutch lever 25 Lifting lever 30 Steering handle 31 Grip portion 32L Left side clutch lever (side clutch operating tool)
32R Right side clutch lever (side clutch operation tool)
37 Main clutch 38 Main clutch link mechanism 41L Left side clutch 41R Right side clutch 43L Left clutch wire 43R Right clutch wire 44 Planting clutch 46 Planting clutch link mechanism 49 Lever link mechanism 51 Front tilt base 52 Rear tilt base 53 Tilt plate 54 Support bolt 55 Guide slot 56 Fixing bolt

Claims

A walking type farm working machine having a steering handle having left and right grips at the rear of the aircraft,
An operation panel body is fixedly attached to an upper portion of a frame body that is erected at the rear of the aircraft body, and the operation handle is prevented from rotating together with the operation panel body on the frame body. Separately from the panel body, it is provided so that it can rotate up and down independently.
Walking type farm working machine.
A power source mounted on the airframe, a pair of left and right wheels that support the airframe, and a pair of side clutches that relay power transmission from the power source to the wheels,
Left and right side clutch operating tools connected to the side clutches via a rope member are disposed at the grip portions of the steering handle,
The walking type agricultural machine according to claim 1.
The rear end of the grips is configured to move forward by rotating the steering handle upward or downward.
The walking type agricultural working machine according to claim 1 or 2.