JP6095469B2 - Walking type work machine - Google Patents

Description

  The present invention relates to a walking type work machine that performs ground work such as farm work.

  In a walking type agricultural working machine or the like, a steering handle that is steered by a walking worker extends backward in the traveling direction of the aircraft. When the steering handle is folded when loaded into an automobile or a transport vehicle or stored in a barn or the like, it is convenient because the occupied space becomes small. Furthermore, in order to make it easy to carry the working machine with the steering handle folded, a handle member or the like is provided. For example, a walking farm machine according to Patent Document 1 includes a handle frame extending from the rear of the machine body, and a handle that is foldable forward with respect to the handle frame. The handle can be fixed to the handle frame by operating the knob bolt with the handle folded forward. A handle member is integrally attached to the handle. By folding the handle forward, the handle member appears above the fuselage. This makes it easy to carry the aircraft. However, since the handle member that is subjected to a large load during carrying is attached to the base end portion of the swinging handle, there is a problem that the base end portion and the peristaltic shaft must be structured to withstand the load. is there.

JP 2011-25770 A (FIGS. 1 and 3)

  In view of the above situation, it is desired to provide a handle member on a walking work machine without placing a burden on the proximal end of the foldable handle.

The walking type work machine according to the present invention includes a handle post fixed to a body frame, a handle post that can swing between a front swinging posture extending forward of the body frame and a rear swinging posture extending rearward from the handle post. A steering handle supported on a rear portion of the post; and a handle member fixed to a rear portion of the handle post so as to be positioned below the steering handle in the backward swinging posture, the handle member including the handle post The rear end of the handle post extends rearward from the rear portion of the handle post .

  In this configuration, the handle member that functions as a lifting grip at the time of conveyance is fixed to the handle post that supports the steering handle so as to be slidable, instead of the steering handle. As a result, the steering handle is not partially subjected to the load applied to the handle member at the time of transportation or the like, and the base end portion only needs to be able to support the steering handle itself, so that the weight can be simplified. it can. Further, the handle member can be used as a fixing rope hook for carrying on a loading platform of a transport vehicle or a stabilizing rope hook for storage.

As a further preferred embodiment, the one preferred embodiment of the present invention, the aircraft transverse width of the base end portion of the steering wheel is smaller than the width of the machine body transverse direction of the handle member, the steering wheel In the backward swing, the limit position of the forward displacement of the steering handle to the backward swing posture is determined by the contact between the base end portion and the handle member. By configuring the handle member in this manner, it is not necessary to prepare a swing stopper as a separate member in order to set the limit of the swing displacement of the steering handle , which is advantageous in terms of cost.

  Furthermore, in a preferred embodiment, the handle member is covered at an upper portion thereof by the swinging of the steering handle to the backward swinging posture and opened at an upper portion thereof by the swinging of the steering handle to the forward swinging posture. Arranged. As a result, the handle member is covered with the steering handle in the backward swinging posture in which the steering handle is in use, which is not obstructive and aesthetically advantageous. Further, at the time of transport or the like, the steering handle is swung to a forward swinging posture in which it is not used. At that time, since the upper part of the handle member is opened, the hand can easily reach the handle member.

  As a preferred shape of the handle member, a structure including a fixing portion fixed to the handle post, an action portion functioning as the rope hook and the lifting grip, and a connection portion connecting the fixing portion and the action portion. Is proposed. As a result, the fixing part can be sized and shaped suitable for fixing to the handle post, and the working part can be sized and shaped to be easily gripped by hand and hung on the rope. As a more specific configuration at that time, the action part and the connection part are formed as a bending rod bent in a ring shape, and the fixing part is at least one free end of the bending rod. Proposed. The advantage of facilitating manufacture can be obtained by using a folded structure. At this time, it is convenient for hooking the rope to have a shape in which the fixing portion is bent at one end and the other end is opened. Further, if both ends of the bending rod are fixed parts, the action part becomes a ring body and is easy to hold.

  In one preferred embodiment of the present invention, a tip end portion of the handle post is formed as a plate-like fixing bracket, and a boss member for bearing a peristaltic shaft of the steering handle is fixed to an upper surface of the fixing bracket. The handle member is fixed to the lower surface of the fixing bracket. In this configuration, since the fixing portion of the handle member is hidden by the fixing bracket, an aesthetic advantage is obtained. In addition, since the boss member that supports the steering handle so as to be slidable can be attached to a flat surface, a simple shape can be achieved, which is advantageous in terms of cost.

It is a side view of the walk type tiller which shows one embodiment of the walk type work machine by the present invention. It is a top view of a walking type tiller. It is a perspective view of the walking type tiller which made the steering handle a back rocking posture. It is a perspective view of the walking type tiller which made the steering handle forward swinging posture. It is a perspective view which shows a viewing window, a fuel tank, and a transmission guide panel. It is a disassembled perspective view which shows the attachment structure of a fuel tank and a body cover. It is a perspective view of a fuel tank. It is sectional drawing which shows holding | maintenance of the top cover by a fuel tank. It is sectional drawing which shows the stay holding a fuel tank. It is sectional drawing which shows a front cover, a top cover, a front stay, and a rear stay. It is a perspective view which shows the attachment structure of a front cover and a top cover. It is a disassembled perspective view which shows the attachment structure of a steering handle. It is sectional drawing which shows the attachment structure of a steering handle. It is a top view which shows another form of a handle member. It is a perspective view of the handle member which functions also as a peristaltic stopper of a steering handle.

FIG. 1 is an overall side view showing a walking type tiller as an example of a walking type working machine according to the present invention. In the following description, the word “front” indicating the front-rear positional relationship represents the forward side in the traveling direction of the work implement, and the word “rear” represents the reverse side.
As shown in this figure, the walking type tiller includes a body frame 1 including an engine frame that supports the engine 2 and a housing of the transmission 10 and a pair of left and right traveling wheels 11 that support the body frame 1 on the ground. And. The engine 2 is disposed in front of the airframe, and the transmission 10 extends obliquely downward and rearward of the engine 2. A fuel tank 4 is disposed behind the engine 2 and above the transmission 10. A rotary tiller 9 as a working device is connected to the rear end of the machine body frame 1.

  The rotary tilling device 9 includes a tilling claw shaft 91, a rotary tilling claw 92 that is attached to the tilling claw shaft 91 and is driven to rotate, a grounding resistance rod 93, and a tilling rotor cover 94 that covers the top of the rotary tilling claw 92. The leveling plate 95 is provided.

  The output of the engine 2 is transmitted to the transmission 10 through a belt-type power transmission mechanism and a main clutch (not shown), and the power shifted by the transmission 10 to the second forward speed and the first reverse speed is transmitted to the left and right through the differential mechanism. It is transmitted to the axle 12 to drive the traveling wheel 11. Further, the branch output (PTO output) from the transmission 10 is transmitted to the rotary tiller 9. Although the main clutch is not shown, for example, the transmission belt wound around the output pulley and the input pulley of the belt-type power transmission mechanism is constructed by a tension pulley that can be switched between a tension state and a relaxation state. Can do.

  A handle post 51 that extends obliquely upward above the rotary tiller 9 is fixed to the rear end of the machine body frame 1. The steering handle 5 is supported at the front end portion of the handle post 51 via a peristaltic shaft 53 extending horizontally in the transverse direction so as to be swingable between a front swinging posture and a rear swinging posture. The steering handle 5 in the forward swinging posture extends substantially horizontally above the transmission 10, the fuel tank 4, and the engine 2 toward the front side as indicated by a one-dot chain line in FIG. The position is substantially the same as the front end position of the body frame 1 or the engine 2. The steering handle 5 in the backward swinging posture extends rearward and upward from the handle post 51, and the tip position in the front-rear direction of the fuselage is located behind the rotary tiller 9. In addition, the steering handle 5 can be set to a plurality of or arbitrary adjustment swing angle positions in the backward swing posture, and can be adapted to the body shape of the control pedestrian.

  As can be understood from FIG. 2, the steering handle 5 is a rod body bent in a U shape as a whole, and left and right free ends are formed as a left base end portion 5a and a right base end portion 5c. The left extension portion 5b connected to the left base end portion 5a and the right extension portion 5d connected to the right base end portion 5c extend while extending the distance to the aircraft body substantially, and further extend in parallel. It is connected by a connecting portion 5e extending in the body width direction. A clutch operating lever 81 extending in parallel with the connecting portion 5 e over the left extension portion 5 b and the right extension portion 5 d is provided on the upper portion of the steering handle 5. Further, the right extension 5d is provided with an accelerator operating tool 82, a differential lock operating lever 84, and a PTO on / off button 85. A speed change operation lever 83 for operating a shift gear for speed change provided in the speed change device 10 operates the steering handle 5 between the left base end portion 5a and the right base end portion 5c, rearward and upward from the speed change device 10. It extends to a position where it can be easily operated by a pedestrian.

  A front guard 7 a is provided at the front end of the body frame 1. The front guard 7a is made of a bar bent in a U shape. The left and right open ends of the front guard 7a are fixed to the front end of the body frame 1 and stand up so as to protect the front of the engine 2.

  As shown in FIGS. 1, 12, and 13, a plate-like fixing bracket 52 is fixed to the tip of the handle post 51 in order to connect the steering handle 5 to the tip region of the handle post 51. . A boss member 55 that rotatably supports the peristaltic shaft 53 is fixed to the upper surface of the fixed bracket 52. Left and right base end portions 5a and 5c of the steering handle 5 are attached to a portion of the peristaltic shaft 53 protruding outward from the boss member 55. With this configuration, the steering handle 5 can be slid into a forward swaying posture that is a transporting or storing posture that extends to the front side of the body frame 1 around the swaying shaft 53 and a rear swaying posture that is a walking work posture. The steering handle 5 is locked at a predetermined swing position by a well-known screw tightening mechanism using a lock knob 54. As apparent from FIG. 2, the peristaltic shaft 53 and the boss member 55 are covered with a cover 56 from above. The cover 56 is formed with a curved recess extending in the longitudinal direction of the machine body to avoid interference with the speed change operation lever 83.

  In the present invention, the handle member 7 b is provided at the rear portion of the handle post 51. In this embodiment, the handle member 7 b is attached to the lower surface of the fixed bracket 52 fixed to the handle post 51. The handle member 7b is a rod member that has an appearance that is partly cut off from a rectangular ring and is formed by bending a rod into a U-shape. That is, the handle member 7 b includes a fixing portion 70 that is a free end, an action portion 71 that functions as a rope hook and a lifting grip, and a connection portion 72 that connects the fixing portion 70 and the action portion 71. As can be understood from FIG. 12, the fixing portion 70 is welded to the lower surface of the fixing bracket 52, but the action portion 71 is separated from the rear end of the fixing bracket 52 due to the length of the connection portion 72 extending rearward therefrom. Thus, the handle member 7b is easy to use as a rope hook or as a lifting grip. Moreover, as apparent from FIGS. 1 and 3, the handle member 7 b is covered from above with the steering handle 5 in the rearward swinging posture in use, which is also aesthetically advantageous. Then, as is clear from FIG. 4, when the steering handle 5 is swung and folded in the forward swinging posture in the transport state, the handle member 7b appears without being disturbed by the steering handle 5, and the upper part thereof is It is a free space. Thereby, the operation | work which hangs a rope on the action part 71, and the work which carries the walk-type tiller by holding the action part 71 become easy. Further, as can be understood from FIG. 2 which is a plan view, the distance between the left base end portion 5a and the right base end portion 5c of the steering handle 5 is smaller than the width of the handle member 7b in the transverse direction. Yes. As a result, when the steering handle 5 swings backward, the left base end portion 5a and the right base end portion 5c come into contact with the handle member 7b, and further swinging is prevented. That is, in this embodiment, the handle member 7b also functions as a peristaltic stopper that determines the limit position of peristaltic displacement of the steering handle 5 to the rear peristaltic posture.

  As is clear from FIGS. 1 and 2, the upper part of the engine 2, the fuel tank 4, and the transmission 10 is covered with a body cover 3. The body cover 3 includes a front cover 3 a that covers an upper front region of the engine 2, a top cover 3 b that also functions as a tank cover, and a rear cover 3 c that is inclined downward to cover the transmission 10. The front cover 3 a includes a skirt that covers the front upper end region of the engine 2. The rear end edge 31a of the front cover 3a is in a substantially abutted state with the front end edge 31b of the top cover 3b. A through-hole 32 through which the fuel supply cylinder portion 42 and the fuel supply cap 40 of the fuel tank 4 pass is formed in the rear region of the top cover 3b that is also a tank cover. As shown in FIGS. 5 and 6, the rear cover 3 c is provided with a notch opening in a connection region with the top cover 3 b, and a viewing window 30 that extends horizontally is formed between the top cover 3 b and the rear cover 3 c. Has been. Further, the rear cover 3c is provided with a rectangular opening 37 that allows the shifting operation lever 83 to be inserted and displaced.

  As shown in FIGS. 6 and 7, the fuel tank 4 includes a substantially rectangular parallelepiped tank body 41, a cylindrical fuel cylinder portion 42, and a cylinder base portion 44 that connects the tank body 41 and the fuel cylinder portion 42. It consists of. The cylinder base 44 includes a cover holding part 45 and a recessed groove 44a. The cover holding part 45 is formed as a large-diameter stepped part with respect to the oil supply cylinder part 42, and its side wall surface is fitted to fit with the peripheral part 34 of the through hole 32 of the top cover (tank cover) 3b. Functions as a surface. The recessed groove 44 a is created by an annular curved surface formed so as to surround the cover holding portion 45, and is connected to the tank body 41. A portion of the rear side of the recessed groove 44a is shallow, and this portion functions as an escape port 44b for discharging the fuel and rainwater accumulated in the recessed portion 44a. The opening of the oil supply cylinder portion 42 functions as an oil supply port 42a and is screwed and sealed by an oil supply cap 40 having an inner cap 40a.

  The side wall of the tank body 41 includes a front wall 41a, a left side wall 41b, a right side wall 41c, and a rear wall 41d. Fixing mounting portions 46 are formed as protruding pieces on the left and right sides of the front wall 41a, and a mounting hole 46a is provided in the center thereof. As is apparent from FIG. 5, the rear wall 41 d has a shape protruding rearward by the amount of the substantially triangular protruding side surface 43 a. Due to the rear protruding shape of the rear wall 41d, a rear protruding surface 43 is formed in the lower half of the rear wall 41d. Since the tank main body 41 is made of a translucent resin, the rear protruding surface 43 functions as a remaining amount display surface that enables the remaining amount of fuel to be confirmed, which will be described in detail later. Further, the projecting side surfaces 43a located on both sides of the rear projecting surface (remaining amount display surface) 43 improve the fuel visibility through the remaining amount display surface when light enters from here.

  As shown in FIG. 10, the fuel tank 4 is placed on a plate-like tank bracket 15 bent along the bottom surface of the fuel tank 4, and this tank is used by using the mounting hole 46 a of the mounting portion 46. Bolts are connected to the bracket 15. The tank bracket 15 has a front end connected to the front stay 13a and a rear end connected to the rear stay 13b. The front stay 13a includes a plurality of legs attached to the engine 2 and a horizontal part supported by the legs and extending substantially horizontally above the engine. As shown in FIGS. 6 and 10, the rear stay 13 b has a lower end fixed to the body frame 1 and is formed of a pair of left and right plates extending obliquely upward, and a tank bracket 15 is fixed to the upper end. The upper edges of the pair of left and right plate members are connected by a plate-shaped shift guide panel 14. The transmission guide panel 14 is formed with a transmission guide groove 14a through which the transmission operation lever 83 can be inserted and displaced. The rear stay 13b and the transmission guide panel 14 can be integrally manufactured by bending or the like.

  As shown in FIGS. 6, 10, and 11, a substantially circular recess 33 that is recessed downward is formed in the rear region of the top cover 3 b that is a tank cover that covers the tank body 41 of the fuel tank 4. ing. A through hole 32 is formed at the center of the recess 33 to allow the fuel supply cylinder portion 42 and the fuel supply cap 40 of the fuel tank 4 to protrude above the top cover 3b. The peripheral edge of the through hole 32 is formed as a horizontal protrusion 34, and an annular grommet 35 having elasticity is attached to the horizontal protrusion 34. A circumferential groove is formed on the outer peripheral surface of the grommet 35, and a horizontal protrusion 34 is fitted in the circumferential groove. Therefore, the substantial diameter of the through hole 32 is the inner peripheral diameter of the grommet 35. For this reason, the inner peripheral diameter of the grommet 35 is larger than the outer diameters of the fuel cap 40 and the fuel cylinder portion 42 of the fuel tank 4. Accordingly, the through hole 32 can pass through the fuel cap 40 even when the fuel tank 4 to which the fuel cap 40 is attached is fixed, so that the top cover 3b can be removed.

  As shown in FIG. 8, an annular groove 45a is provided on the side surface of the cover holding portion 45, and when the inner peripheral surface of the grommet 35 enters the annular groove 45a, the rear portion of the top cover 3b is It is held in the fuel tank 4. That is, the grommet 35 functions as a held portion of the top cover 3 b with respect to the cover holding portion 45. As shown in FIGS. 10 and 12, in this embodiment, the horizontal protrusion 34 is formed with an escape hole 34a which is a through slit that is not blocked by the grommet 35 at two opposing positions. The spilled fuel or the like can be released downward through the escape hole 34a.

  As shown in FIGS. 9, 10, and 11, the front portion of the top cover 3 b is provided with an engaging portion 38 b that protrudes from the back surface thereof. The engaging portion 38b is detachably engaged with an engaged portion 38a provided on the horizontal portion of the front stay 13a. A preferred form of the engaging portion 38b and the engaged portion 38a is a connecting fitting having elasticity such as a banana plug and a socket. Such a connection fitting is capable of one-touch engagement. Further, the engagement is maintained by the weight of the top cover 3b. By such engagement by the connecting metal fitting, the front portion of the top cover 3b is held by the front stay 13a. Due to the mounting structure of the top cover 3b, the top cover 3b can be easily removed and attached again only with the top cover 3b while the fuel tank 4 is fixed.

  As shown in FIGS. 3 to 6, the top cover 3 b and the rear cover 3 c are connected so as to create a viewing window 30. The rear end edge 31 c of the top cover 3 b is formed so as to cover only the upper part of the rear wall 41 d protruding rearward of the fuel tank 4. In addition, in order to form a viewing window 30 in the center of the front edge 36 of the rear cover 3c, it corresponds to the lower end of the remaining amount display surface (rear protruding surface) 43 formed on the rear wall 41d of the fuel tank 4. A rectangular cutout with a depth is provided. A window edge 36a is formed at the front edge 36 of the rear cover 3c by this notch, and a remaining amount display surface (rear protruding surface) 43 of the fuel tank 4 is formed by the window edge 36a and the rear edge 31c of the top cover 3b. A viewing window 30 to be exposed is created. Further, the window edge 36a has a shape and dimension that also exposes the protruding side surface 43a provided on the rear wall 41d of the fuel tank 4. An opening 37 provided in the rear cover 3 c and exposing the speed change guide panel 14 is provided adjacent to the lower side of the viewing window 30. A shift guide groove 14a is formed in the shift guide panel 14, and the operator grasps the shift position based on the position of the shift operation lever 83 in the shift guide groove 14a. From this, since the remaining amount display surface of the fuel tank 4 exposed through the observation window 30 exists in the immediate vicinity of the exposed position of the shift guide panel 14 that the driver frequently observes, the driver naturally Pay attention to the remaining amount. Further, since the observation window 30 and the fuel filler opening 42a of the fuel tank 4 are arranged close to each other, the fuel level can be visually observed through the observation window 30 while pouring fuel into the fuel filler opening 42a.

[Another embodiment]
(1) In the above-described embodiment, the handle member 7b is substantially U-shaped, and the fixing portion 70, which is an open end, is connected to the lower surface of the fixing bracket 52 of the handle post 51, so that it is closed. It is a ring body. However, if the handle member 7b can function as a rope hook and a lifting grip at the time of conveyance, various shapes can be adopted. An example thereof will be described with reference to FIGS.
(A) The shape of the handle member 7b shown in FIG. 14A is similar to that of the handle member 7b shown in the previous embodiment, but is slightly smaller, and two pieces are prepared. Each handle member 7 b is disposed so as to protrude from both sides of the fixed bracket 52. The action part 71 is also in the form of a ring, and each of the action parts 71 is gripped by two hands, thereby making it easier to carry the work machine.
(B) The handle member 7b shown in FIG. 14B has a fork shape. Since the action portion 71 protruding rearward from the fixed bracket 52 is a bifurcated fork, it is easy to hook the rope. Of course, it may have a multi-limbed fork shape with two or more branches.
(C) In the handle member 7b shown in FIG. 14 (c), in the handle member 7b shown in the previous embodiment, one fixing portion 70 and the connecting portion 72 are omitted, and the action portion 71 is provided. It has a hook shape.
(D) The handle member 7b shown in FIG. 15 is a T-shaped rod body erected on the upper surface of the handle post 51, unlike what has been described so far. The action portion 71 of the handle member 7b is a transverse rod of a T-shaped rod body, and this transverse rod also functions as a peristaltic stopper that determines the limit position of peristaltic displacement of the steering handle 5 to the forward peristaltic posture.
(2) In the embodiment described above, the handle post 51 is formed of a square pipe, but the structure of the handle post 51 is not limited in the present invention. For example, a frame structure or the like may be used as long as it is fixed to the body frame 1 and supports the steering handle 5 so as to be slidable.
(3) In the above-described embodiment, the walking type tiller is taken up as the walking type working machine. However, a walking type lawn mower, a walking type sprayer, and the like can be similarly configured.

  The present invention can be applied to a walking type working machine in which a steering handle is supported by a handle post so as to be swingable.

1: Airframe frame 2: Engine 10: Mission case 11: Traveling wheel 12: Axle 14: Shift guide panel 14a: Shift guide groove (shift guide)
3: Airframe cover 3a: Front cover 3b: Top cover 3c: Rear cover 30: Viewing window 32: Through hole 33: Depression 34: Horizontal protrusion (periphery)
4: Fuel tank 40: Refueling cap 5: Steering handle 5a: Left base end 5b: Left extension 5c: Right base end 5d: Right extension 5e: Connection 51: Handle post 52: Fixed bracket 53: Peristaltic shaft 54: Lock knob 55: Boss member 56: Cover 7a: Front guard 7b: Handle member 70: Fixing part 71: Hook grip part (action part)
72: Connection part 83: Shifting operation lever 9: Rotary tillage device 91: Tillage claw shaft 95: Leveling plate

Claims (6)

A handle post fixed to the fuselage frame;
A steering handle supported at a rear portion of the handle post so as to be capable of swinging between a forward swing posture extending forward of the body frame and a rear swing posture extending rearward from the handle post;
A handle member fixed to a rear portion of the handle post so as to be positioned below the steering handle in the backward swinging posture ;
The said handle member is a walking type working machine extended from the rear part of the said handle post to the back rather than the rear end of the said handle post . The width of the proximal end portion of the steering handle in the transverse direction of the fuselage is smaller than the width of the handle member in the transverse direction of the fuselage, and the rearward movement of the steering handle is performed by contact between the proximal end portion and the handle member. The walking type work machine according to claim 1, wherein a limit position of a peristaltic displacement of the steering handle to the backward peristaltic posture is determined .   The handle member is disposed so that the upper part of the handle member is covered by the swinging of the steering handle to the backward swinging posture and the upper part thereof is opened by the swinging of the steering handle to the forward swinging posture. The walking work machine according to 1 or 2.   The said handle member consists of the fixing | fixed part fixed to the said handle post, the action part which functions as a rope hook and a lifting grip, and the connection part which connects the said fixing | fixed part and the said action part. The walking type work machine according to any one of the above.   The walking working machine according to claim 4, wherein the action portion and the connection portion are formed as a bending rod bent in a ring shape, and the fixing portion is at least one free end portion of the bending rod.   The front end portion of the handle post is formed as a plate-like fixing bracket, and a boss member for bearing the peristaltic shaft of the steering handle is fixed to the upper surface of the fixing bracket, and the handle member is fixed to the lower surface of the fixing bracket The walking work machine according to any one of claims 1 to 5, wherein is fixed.

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