JP4773321B2 - Walking type work machine - Google Patents

Description

The present invention relates to a walk-behind working machine having a bar handle of the pair of left and right vehicle body longitudinal direction.

Conventionally, for example, Patent Document 1 discloses a walking work machine described above. Patent Document 1 describes a handle frame as a bar-type steering handle. This handle frame includes a pair of left and right vehicle body front and rear handle frame portions. The pair of left and right handle frame parts are provided with chrysanthemum pieces provided at the front end parts thereof. The handle frame is fastened and connected to the transmission case of the vehicle body by the Kikuza piece of each handle frame portion.

Japanese Patent Laid-Open No. 6-11019

In a walking type work machine including a pair of left and right bar handles, the pair of left and right bar handles are coupled to each other so as to have a predetermined handle strength and handle shape. For this reason, when a bar-type steering handle is obtained by adopting the above-described conventional technology, means for attaching the steering handle to the vehicle body are provided at the front end of each bar handle, so the left and right bar handles are connected. The interlocking connecting means is arranged at the middle part or the rear end side in the front-rear direction of the steering handle. Then, the connecting means becomes an obstacle, and it may be difficult to support the operation lever on the bar handle. Further, since the interval between the left and right bar handles is generally larger on the rear end side than the front end side of the steering handle, a connecting means having a relatively long length in the lateral direction of the steering handle is required as a connecting means. It was.

SUMMARY OF THE INVENTION An object of the present invention is to provide a walking type work machine that can easily avoid problems related to the installation of an operation lever and a connecting means, and can easily arrange an operation cable, while ensuring a handle shape and handle strength. There is.

The present first invention, Oite the walk-behind working machine having a bar handle of the pair of left and right vehicle body longitudinal direction,
The pair of left and right vehicle body front-rear bar handles, a vehicle body side connection bar that connects the front end portions of the pair of left and right bar handles, and both end portions of the connection bar and the front end portions of the left and right bar handles are connected. A steering handle is constituted by a single round steel pipe bent and formed into a substantially U-shape that opens toward the rear of the vehicle body as viewed in the vertical direction of the vehicle body so as to include left and right curved portions,
The left and right reinforcing stays connected across the end portions of the bar handle and the connecting bar are provided in the inner portions of the left and right curved portions ,
A horizontally long handle cover is provided along the connection bar and the left and right curved portions so as to cover the upper portions of the left and right reinforcing stays, the connection bar, and the left and right curved portions .

According to the configuration of the first invention, the front end portions of the pair of left and right bar handles are connected to each other by the connecting bar and the left and right curved portions , and the connection strength is improved by the reinforcing stay. The connecting bar and the left and right curved portions connect the front end portions of the pair of left and right bar handles, and the reinforcing stay connects the end portions of the bar handle and the connecting bar. As a result, the pair of left and right bar handles have a predetermined connection posture and excellent connection strength without arranging connecting means for connecting the pair of left and right handlebars at the middle part or the rear end side in the front-rear direction of the steering handle. The control handle is connected to each other so that the steering handle has a predetermined handle shape and excellent handle strength. Because the handle cover that covers the upper part of the left and right reinforcement stays, the connecting bar, and the left and right curved parts is provided, when operating cables are placed along the bar handle or connecting bar, they are hidden under the handle cover. Thus, it can arrange | position.

As a result, while having a predetermined handle shape and excellent handle strength, equipment such as operation levers and operation cables to be supported by the bar handle can be used with a simple support structure where there are no obstacles. It can be hidden behind the cover, and a relatively short connecting bar can be used to provide a steering handle that has a good appearance and is simple and has high commercial value.

  In the second aspect of the invention, the reinforcing stay is provided with a cover fastening portion that supports the handle cover.

  According to the configuration of the second aspect of the invention, the handle cover can be supported using the reinforcing stay as the support member of the handle cover.

  As a result, the handle cover can be supported by a simple support structure that does not require a special support member, and a simple steering handle having a high commercial value can be obtained from this aspect.

In the third invention , the handle cover includes a top plate portion and a side wall portion extending downward from the top plate portion to the vehicle body, and the operation cable is connected to the top cover portion and the side wall portion. the cable accommodation space for accommodating it along a bar is formed in the interior of the handle cover.

If by the configuration of the third invention, because that forming the cable accommodating space inside the handle cover by the top plate and the side wall portion of the wafer Ndorukaba, when disposed in and along the operating cable to a handlebar or the connection bar The operation cable can be disposed so as to be hidden inside the handle cover, or the diffusion caused by bending of the operation cable can be prevented by receiving the operation cable by the side wall portion.

As a result, while having a predetermined handle shape and handle strength, equipment such as an operation lever and an operation cable supported by the bar handle can be used with a simple support structure where there are no obstacles, Hiding in the shadow, or while stopping the operation cable while stopping it on the handle cover, and adopting a relatively short connecting bar, it has a simple and high commercial value steering handle that looks good Obtainable.
The fourth aspect of the present invention includes a vehicle body side support frame that is pivotally supported by a transmission case around a vertical axis of the vehicle body, and a handle side support frame that is swingably supported by the vehicle body side support frame. The connecting bar is connected to a rear end portion of the handle side support frame so that the left and right curved portions are positioned on the left and right outer sides of the handle side support frame, and the handle side support frame and the connection bar The upper portion of the connecting portion and the rear portion of the handle-side support frame are configured to be covered with the handle cover.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an overall side view of a walking work machine according to an embodiment of the present invention. FIG. 2 is an overall side view of the walking work machine according to the embodiment of the present invention. As shown in these drawings, the walking type working machine of the present embodiment includes a self-propelled vehicle body that is self-propelled by a pair of left and right driveable tire wheels 1, 1 and a rear end side of a body frame 2 of the self-propelled vehicle body. And a hitch 4 provided at the rear end portion of the vehicle body frame 2.
In this walking type work machine, a rotary tiller (not shown) is connected to the rear part of the self-propelled vehicle body via the hitch 4 so that the driving force of the engine 6 is transmitted from the transmission case 5 to the rotary tiller. By constructing, a walking type tiller is configured, and various working devices are connected to the rear part of the self-propelled vehicle body to configure various walking type working machines.

The self-propelled vehicle body will be further described in detail.
The vehicle body frame 2 includes the transmission case 5 having a pair of left and right axles 7 and 7 that can be driven at the lower portion, and an engine mounting frame 8 that extends forward from the front portion of the transmission case 5 toward the vehicle body. It is configured. The engine mounting frame 8 supports the engine 6. The mission case 5 inputs the driving force from the output shaft 6a of the engine 6 to the input shaft 5a via the main clutch 9 comprising a belt tension clutch, and the driving mission of the input shaft 5a is located in the mission case. (Not shown) is transmitted to the pair of left and right axles 7,7.

As shown in FIGS. 1, 2, and 3, the steering handle 10 includes a pair of left and right vehicle body front and rear bar handles 11 and 11, and a vehicle body sideways connection that connects the front end portions of the pair of left and right bar handles 11 and 11. The left and right curved portions 16 that connect the bar 12, both end portions of the connecting bar 12 and the front end portions of the left and right bar handles 11, 11, and the inner portions of the left and right curved portions 16 on both ends of the connecting bar 12 are provided. And a reinforcing stay 14. The pair of left and right bar handles 11 and 11 and the connecting bar 12 are configured by a single round steel pipe bent into a substantially U-shape that is open toward the rear of the vehicle as viewed in the vertical direction of the vehicle. The steering handle 10 is connected to the rear end of the handle support frame 3 at an intermediate portion of the connecting bar 12. The connecting stays 14 on both ends of the connecting bar 12 are connected across the front end of the bar handle 11 and the end of the connecting bar 12 to improve the connecting strength between the connecting bar 12 and the bar handle 11.

  A front end portion of the handle support frame 3 is supported by the transmission case 5 so as to be rotatable and adjustable around an axis P1 that is vertically directed to the vehicle body. The steering handle 10 shown by a solid line in FIG. 1 shows a rearward state. A steering handle 10 indicated by a two-dot chain line in FIG. 1 indicates a forward-facing state. As shown in these drawings, the steering handle 10 is pivotally adjusted together with the handle support frame 3 around the axis P1, so that the steering handle 10 extends rearwardly from the mission case 2 and the mission case. It can be used by switching from 2 to a forward mounting state extending forward from the vehicle body.

As shown in FIGS. 1 and 3, the handle support frame 3 includes a vehicle body side support frame 3a and a handle side support frame 3b formed as a separate member from the vehicle body side support frame 3a. . The vehicle body side support frame 3a is supported on the transmission case 5 so as to be rotatable around the axis P1. The handle side support frame 3b is rotatably connected to the vehicle body side support frame 3a via a connecting shaft 15 positioned at one end of the handle side support frame 3b, and left and right curved portions 16 are positioned on the left and right outer sides of the handle side support frame 3b. As shown in the figure, it is connected to the connecting bar 12 of the steering handle 10 by a connecting portion arranged on the other end side. A handle lock mechanism 20 is provided across the vehicle body side support frame 3a and the handle side support frame 3b.

That is, the steering handle 10 can be used by adjusting the height of the pair of left and right grips 11a, 11a relative to the self-propelled vehicle body to be lower or higher.
That is, the handle lock mechanism 20 is switched to an unlocked state in which the handle-side support frame 3b is allowed to swing up and down with respect to the vehicle body-side support frame 3a around the axis of the connecting shaft 15. When the vertical swing lock by the handle lock mechanism 20 of the control handle 10 is released, the control handle 10 is controlled to swing up and down around the axis of the connecting shaft 15 together with the handle support frame 3b. Thereafter, the handle lock mechanism 20 is switched to a locked state in which the handle-side support frame 3b cannot be vertically swung with respect to the vehicle body-side support frame 3a, and the steering handle 10 is rocked up and down by the handle lock mechanism 20. Put it in a state. Then, the steering handle 10 is in an attached state in which the vertical angle with respect to the mission case 5 becomes large and the height of the pair of left and right grips 11a, 11a with respect to the self-propelled vehicle body increases, or the mission of the steering handle 10 The vertical angle with respect to the case 5 becomes small, and the pair of left and right grips 11a, 11a may be in an attached state in which the height of the self-propelled vehicle body is low.

  As shown in FIGS. 1 and 2, the steering handle 10 has a steering clutch lever 30, a main clutch lever 31, and a finger provided in the vicinity of the grip portion 11 a of the bar handle 11 located on the left side in a rearwardly attached state. An operation clutch lever 32 and an engine stop switch 33 are provided. Further, the steering handle 10 is attached to the rear side of the bar handle 11 located on the right side of the steering handle 10, the steering clutch lever 30, the work clutch lever 34, the handle up / down lever 35, and the accelerator lever 36 provided in the vicinity of the grip 11 a. And. The handle up / down lever 35 is arranged so that the operation portion 35a of the handle up / down lever 35 is positioned in the vicinity of the grip portion 11a so that it can be operated while supporting the grip portion 11a. Further, the steering handle 10 includes an auxiliary clutch lever 37 supported across a pair of left and right bar handles 11.

  The left steering clutch lever 30 is operated to switch a steering clutch (not shown) located inside the mission case 5 between an on state and a disconnected state via an operation cable 40, and thereby the self-propelled vehicle body. The left tire wheel 1 is switched between a driving state and a stopped state so as to steer. The right steering clutch lever 30 is operated to switch a steering clutch (not shown) located inside the mission case 5 between an on state and a disconnected state via an operation cable 40, and thereby the self-propelled vehicle body. The right tire wheel 1 is switched between a driving state and a stopped state so that the steering operation is performed. The main clutch lever 31 is oscillated along a guide groove facing the vehicle body in a lever guide 41 (see FIG. 2) fixed to the bar handle 11, so that the main clutch lever 31 is operated via an operation cable 42. 9 is switched between the on state and the off state, whereby the pair of left and right tire wheels 1 and 1 are switched between the driving state and the stopping state so as to run and stop the self-propelled vehicle body. The finger operation clutch lever 32 is operated to swing up and down by a finger of a hand supporting the grip portion 11a, thereby operating the main clutch lever 31 to switch the main clutch 9. The auxiliary clutch lever 37 is operated to swing to the lowering cut position against the restoring force to the ascending entry position, thereby switching the main clutch lever 31 to the disengaged state and stopping the self-running vehicle body.

  The engine stop switch 33 is provided at the rear end of the lever guide 41. The engine stop switch 33 is operated to stop the engine 6 when pressed. The push button of the engine stop switch 33 is in an upward rearward posture so that it can be easily operated from the rear. The work clutch lever 34 is swing-operated along a longitudinal guide groove of a lever guide 44 (see FIG. 2) fixed to the bar handle 11, whereby the transmission case 5 is connected via an operation cable 45. A work clutch (not shown) located inside the vehicle is switched between an on state and a disengaged state, and the work device connected to the rear part of the vehicle body is driven and stopped. The accelerator lever 36 operates an accelerator device (not shown) of the engine 6 via an operation cable 46. The handle up / down lever 35 is operated to swing up and down with the finger of the hand supporting the grip portion 11, thereby switching the handle lock mechanism 20 between the unlocked state and the locked state via the operation cable 47. .

  The operation cable 40 linked to each steering clutch lever 30 is linked to the steering clutch via a cable switching device 50 supported by the handle support frame 3. When the mounting direction of the steering handle 10 is switched between the backward direction and the forward direction, the cable switching device 50 operates along with this, and the interlocking state between the pair of steering clutch levers 30 and 30 and the pair of steering clutches is changed. It automatically switches to the one corresponding to the mounting direction of the steering handle 10. That is, when the steering handle 10 is attached in the rearward direction, the steering clutch lever 30 that is positioned on the left side in the forward direction of the self-propelled vehicle body in this case corresponds to the tire wheel 1 on the left side of the self-propelled vehicle body. In this case, the steering clutch lever 30 that is located on the right side of the forward direction of the self-propelled vehicle body is interlocked with the steering clutch corresponding to the tire wheel 1 on the right side of the self-propelled vehicle body. When the steering handle 10 is attached forward, the steering clutch lever 30 that is positioned on the left side in the forward direction of the self-propelled vehicle body in this case is steered corresponding to the tire wheel 1 on the right side of the self-propelled vehicle body. In this case, the steering clutch lever 30 that is positioned on the right side of the forward direction of the self-propelled vehicle body is interlocked with the steering clutch corresponding to the tire wheel 1 on the left side of the self-propelled vehicle body.

  As shown in FIGS. 1 and 2, the steering handle 10 includes a handle cover 13 attached to the front end side thereof. FIG. 3 is a plan view of the steering handle 10 at the handle cover mounting portion. In this figure, the handle cover 13 is indicated by a two-dot chain line. FIG. 4 is a perspective view of the handle cover 13 in a removed state. 5 is a cross-sectional view taken along the line AA in FIG. As shown in these drawings, the handle cover 13 includes a top plate portion 60 and a side wall portion 61 that extends downward from the end portion around the top plate portion 60 and opens downward in the vehicle body. It is a container shape. The top plate part 60 and the side wall part 61 are produced by integral molding of a resin material. That is, the entire handle cover 13 is made of resin.

  The side wall 61 has a forward opening 62 provided to open toward the front of the vehicle body at the center of the handle cover 13 in the lateral direction of the vehicle body, and a rearward opening provided to open toward the rear of the vehicle body at both ends of the handle cover 13. 63. The top plate portion 60 includes a pair of mounting projections 64 and 64 projecting from the inner surface side of both end portions thereof, and one positioning projection 65. The pair of attachment protrusions 64, 64 abut against cover fastening portions 70, 70 provided on the reinforcement stay 14, and are attached to the screw holes 71 of the cover fastening portion 70 from below the reinforcement stay 14 through the tool holes 75. The attached mounting screw 72 is screwed and connected. The positioning projection 65 is engaged with a positioning hole 73 provided in the reinforcing stay 14 between the pair of screw holes 71, 71 to position the handle cover 13 with respect to the connecting bar 12.

In other words, the handle cover 13 is attached to each of the reinforcing stays 14 so that the handle side support frame 3b of the handle support frame 3 enters the forward opening 62 and the front end side of one bar handle 11 enters the left and right rear openings 63. Is supported by the cover fastening portion 70. That is, the mounting protrusions 64 are tightened and connected to the cover fixing portion 70 by the mounting screws 72 screwed and connected thereto. In this way, the horizontally long handle cover 13 along the connecting bar 12 and the left and right curved portions 16 attached to the steering handle 10 is connected to the connecting bar 12 and the pair of reinforcing stays 14 , 14 by the top plate portion 60. covering the upper part 16, the side wall portion 61 has covered the front and rear connecting bar 12 and the reinforcing stay 14, the rear portion of the upper connecting portion and the handle-side support frame 3b of the handle-side support frame 3b and the connecting bar 12 Cover.

  In the handle cover 13, the top plate portion 60 and the side wall portion 61 form a cable housing space 74 inside the handle cover 13, and the operation cables 40, 42 between one steering clutch lever 30 and the main clutch lever 31. Then, an electric wire (not shown) of the engine stop switch 33 is introduced into the cable housing space 74 from the one rearward opening 63, and the main clutch 9, the cable switching device 50, the engine stop from the frontward opening 62 or the vicinity thereof. It arrange | positions so that it may lead out toward an apparatus (not shown), and accommodates the operation cables 40 and 42 and the intermediate part of an electric wire along the connection bar 12 in the cable accommodation space 74. FIG.

  The handle cover 13 introduces the operation cables 40, 45, 46 of the other steering clutch lever 30, the working clutch lever 34, and the accelerator lever 36 from the other rear opening 63 into the cable housing space 74, thereby opening the front opening. 62 or the vicinity thereof is arranged so as to be led out toward the steering clutch, the working clutch, and the cable switching device 50, and the intermediate portions of the operation cables 40, 45, 46 are arranged along the connecting bar 12 in the cable housing space 74. Contained. When the operation cables 40, 42, 45, 46 try to diffuse outside the cable housing space 74 due to bending between the bar handle 11 and the connecting bar 12, the side wall 61 is moved by the inner surface of the operation cable 40. 40, 42, 45, 46 are received and supported, and the diffusion of the operation cables 40, 42, 45, 46 is prevented. The band 48 shown in FIGS. 5 and 3 collectively binds the operation cables 40, 45, 46 to the connection bar 12. The other band 48 shown in FIG. 3 binds the operation cables 40 and 42 together to the connecting bar 12. Each band 48 is wound around the connecting bar 12 through a gap between the connecting bar 12 and the reinforcing stay 14.

[Another Example]
The present invention can be applied to various working machines such as a walking type rice transplanter in addition to the walking type working machine of the above embodiment. Accordingly, the walking type working machine, the walking type rice transplanter, and the like are collectively referred to as a walking type working machine.

Overall side view of walking type work machine Overall plan view of walking type work machine Plan view of the steering wheel handle cover mounting part Perspective view with handle cover removed AA cross-sectional arrow view of FIG. Sectional view showing the handle cover mounting structure

3a Car body side support frame
3b Handle side support frame
5 Mission case
10 Steering handle 11 Bar handle 12 Connecting bar 13 Handle cover 14 Reinforcing stay
16 Bending portions 40, 42, 45, 46 Operation cable 60 Top plate portion 61 Side wall portion 70 Cover fastening portion 74 Cable storage space
P1 Vertical axis of car body

Claims (4)

A walking work machine having a pair of left and right car body front and rear bar handles,
The pair of left and right vehicle body front-rear bar handles, a vehicle body side connection bar that connects the front end portions of the pair of left and right bar handles, and both end portions of the connection bar and the front end portions of the left and right bar handles are connected. A steering handle is constituted by a single round steel pipe bent and formed into a substantially U-shape that opens toward the rear of the vehicle body as viewed in the vertical direction of the vehicle body so as to include left and right curved portions,
The left and right reinforcing stays connected across the end portions of the bar handle and the connecting bar are provided in the inner portions of the left and right curved portions ,
A walking type work machine provided with a horizontally long handle cover along the connecting bar and the left and right curved portions so as to cover the upper sides of the left and right reinforcing stays, the connecting bar, and the left and right curved portions . The walking type work machine according to claim 1, wherein a cover fastening portion for supporting the handle cover is provided on the reinforcing stay . The handle cover includes a top plate portion and a side wall portion extending downward from the top plate portion to the vehicle body, and the operation cable is accommodated along the connecting bar by the top plate portion and the side wall portion. The walking work machine according to claim 1 , wherein a cable housing space is formed inside the handle cover . A vehicle body side support frame that is rotatably supported by a transmission case around a vertical axis of the vehicle body, and a handle side support frame that is supported by the vehicle body side support frame so as to swing up and down.
The connecting bar is connected to the rear end of the handle side support frame so that the left and right curved portions are positioned on the left and right outer sides of the handle side support frame,
The connection part of the said handle side support frame and the said connection bar, and the upper part of the rear part of the said handle side support frame are comprised so that it may cover with the said handle cover. Walking type work machine.

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