JP4127003B2 - Walk-type field cultivator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a configuration of a walking type tiller.
[0002]
[Prior art]
Conventionally, as shown in Japanese Utility Model Laid-Open No. 7-35740, in a walk-type field cultivator in which a handle member is extended behind the engine, a so-called engine that causes the handle member to stop the output of the engine via the electrical signal One with a stop switch is known.
[0003]
[Patent Document 1]
Japanese Utility Model Publication No. 7-35740 [0004]
[Problems to be solved by the invention]
However, the handle member of the walking type tiller is provided with an accelerator lever and a clutch lever in addition to the engine stop switch. Conventionally, the wires and electric wires of these operation members have been routed to each of them. In the workshop where the trees grow thick, there was a problem that vegetation was caught and the wires were bent at a steep angle and disconnected.
[0005]
Also, when cultivating the cultivator or during engine maintenance, if the wire member of the engine stop switch and the wire of the accelerator lever are attached and detached separately, both of them will be entangled or duplicated wiring work and installation work will occur. There was a problem that it took time and effort.
[0006]
[Means for Solving the Problems]
In view of the above problems, the present invention has taken the following technical means.
That is, according to the first aspect of the present invention, in the walking type tiller in which the handle member (1) is extended behind the engine (E), the handle member (1) is connected to the engine (E) via an electric signal. a switch member for stopping the output (3), a cover for inserting an accelerator operation unit pushing and pulling through the increase or decrease adjusts the output of the engine (E) of the wire (4) provided with a (5), wherein the wire (4) In the member (6), an electric wire (L1) connecting the switch member (3) and a ground wire (L2) extending from the switch member (3) are placed symmetrically with respect to the wire (4). The walking type tiller is characterized in that the wire (4) is a metal member having a larger diameter than the electric wire (L1) or the ground wire (L2) .
[ 0007 ]
[0008]
【The invention's effect】
In the invention of claim 1 constructed as described above, together line member to be routed in tillers, with the utmost to prevent snagging plants and obstacles, in particular electric wires (L1) or ground line (L2) The wire (4) can reinforce and prevent disconnection. Since the line L1 and ground wire L2 has a configuration to place a wire (4) as a symmetric, wire (L1) and ground wire (L2) wire was a metal member that is configured to be larger in diameter than (4) is interposed Contact between the lead wire (L1) and the ground wire (L2) can be prevented as much as possible .
[ 0009 ]
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 2, the walking type tiller is an axle tilling type walking type tiller T, and an engine mounting frame 11 that also serves as a bumper is provided at the front of the body, and an engine E is provided on the frame 11. A fuel tank 13 is provided above the engine E, and the fuel in the tank 13 is sent to the combustion chamber of the engine E via a pump 14 and a filter 15 at the rear of the engine.
[0011]
Further, a throttle arm (not shown) for adjusting the rotational output is provided on the side of the engine E, and the arm and a rotation base of an accelerator lever 5 described later are connected by a push-pull wire 4. It has become.
A transmission case 20 having a transmission mechanism such as a chain or a sprocket is provided inside the engine E, and a tilling shaft 22 having a plurality of tilling claws 21, 21. It is configured to project.
[0012]
Thereby, the rotational power of the engine E is transmitted to the tilling shaft 22 through the transmission mechanism, and the tilling claws 21, 21,... Are rotated to plow the soil. Further, at the rear part of the engine E, there is provided a forward / reverse switching lever 23 for switching the rotation of the tilling shaft 22 between forward and reverse and switching the advancing direction of the airframe forward and backward, and a handle post 25 is erected. A bifurcated handle 1 serving as a handle member is supported on the upper portion.
[0013]
As shown in FIG. 1, the handle 1 includes a connecting frame 1 </ b> S that connects a left frame 1 </ b> L, a right frame 1 </ b> R, and intermediate portions of the left and right frames 1 </ b> L and 1 </ b> R.
An accelerator lever 5 serving as an accelerator operating member is rotatably supported at the end of the right frame 1R, and the rotating base of the lever 5 is connected to the throttle arm of the engine E via a push-pull wire 4. When the accelerator lever 5 is turned to the outside of the machine body, the rotation of the engine E is increased. When the lever 5 is turned to the inside of the machine body, the rotation of the engine E is decelerated. .
[0014]
Further, an engine stop switch 3 is provided at the center of the connecting frame 1S, and the internal contact is turned off by pressing the switch 3 to cut off the power supply to the ignition plug of the engine E. The engine stop switch 3 is composed of a left / right two-position switch, and is biased to the left / right side by an internal spring and can be held on the side opposite to the biasing direction by an engagement mechanism. . As a result, at the time of engine start and normal operation, the switch 3 is held on the counter-biasing side, the internal contact is turned ON, and the ignition plug of the engine E can be energized. When 3 is pressed, the engaging portion is released, the internal contact is turned off, the power supply to the engine E is stopped, and the rotation output is stopped.
[0015]
Further, as shown in FIG. 1B, the push-pull wire 4 of the accelerator lever 5, the signal line L1 and the ground line L2 of the engine stop switch 3 are made of a resin cover member (hereinafter, cord cover 6). In the cross-sectional shape of the cover 6, the signal line L <b> 1 and the ground line L <b> 2 are separated from each other at symmetrical positions with the push-pull wire 4 as the center. The cord cover 6 is routed along the right frame 1R from the rear part of the engine E, and the cover 6 is split into three near the connecting position of the connecting frame 1S to push the push-pull wire 4 to the right. In addition to being connected to the accelerator lever 5 along the frame 1R, the signal line L1 and the ground line L2 are connected to the engine stop switch 3 along the lower surface of the connecting frame 1S.
[0016]
The push-pull wire 4 is a metal member having a larger diameter than the signal line L1 and the ground line L2, and has a structure in which electricity is not conducted by coating the surface.
In the cultivator T configured as described above, when the accelerator lever 5 is rotated, the push-pull wire 4 is pushed and pulled in the cord cover 6 to adjust the output of the engine E, that is, the accelerator amount. In an emergency, etc., the engine stop switch 3 is operated with a European pressure to turn off the switch signal, specifically, energization to stop the output of the engine E.
[0017]
As a result, line members such as wires and electric wires routed to the cultivator T can be gathered to prevent vegetation and obstacles from being caught as much as possible. In particular, the electric wire L1 or the ground wire L2 can be connected to the push-pull wire 4. It can be reinforced, and disconnection can be prevented by preventing extreme bending. Moreover, since the wire 4 and the electric wire L1 or the ground wire L2 are to be connected to equipment in the vicinity of the engine E, the troubles such as entanglement of both, or losing sight of the other while attaching one, and duplication are repeated. Wiring and installation operations are reduced, and handling during production and maintenance can be improved.
[0018]
In addition, by arranging the wire L1 and the ground wire L2 separately in a cross-sectional view of the cord member, even if the cord cover 6 is cracked due to contact with a sharp obstacle, the current is prevented from flowing to the other. Thus, malfunction of the cultivator T can be prevented. Here, since the electric wire L1 and the ground wire L2 are arranged so that the push-pull wire 4 is arranged symmetrically , the cord 4 is prevented from being cut at the obstacle and the electric wire L1 and the ground wire L2 are interposed. Can be prevented as much as possible.
[0019]
Next, the clutch lever 30 of the handle 1 will be described.
The clutch lever 30 is configured as a so-called deadman clutch that can be operated with a thumb, and is provided at the rear portion of the left frame 1L of the handle 1.
Specifically, as shown in FIGS. 3 to 5, a metal cover 31 is attached to the rear portion of the left frame 1R, and a guide plate having a guide groove 32 for restricting the operation angle of the clutch lever 30 on the lower surface of the cover 31. 33 is installed below. The guide plate 33 is provided with three shafts (rear shaft 34, intermediate shaft 35, front shaft 36) in order from the rear side of the machine body, and is fixed to the rear shaft 34 at the base of the clutch lever 30. A rhomboid clutch lever base plate 37 is rotatably supported, and a forward / reverse interlocking plate 39 for transmitting the operation position of the forward / reverse switching lever 23 to the intermediate shaft 35 by a wire 38 is supported. .
[0020]
Further, the front shaft 36 rotatably supports a lever interlocking plate 41 that is interlocked with the rotating operation of the clutch base plate 37, and the wire 41 is disconnected from the plate 41 and the clutch in the transmission mechanism. In addition to being connected, a protrusion 37 a provided at the end of the clutch base plate 37 and a guide groove 41 a opened in the lever interlocking plate 41 are engaged.
[0021]
Accordingly, when the lever interlocking plate 41, that is, the clutch lever 30 is operated beyond the fulcrum position, the lever 30 is positioned higher than the front shaft 36 (clutch engagement position) as shown in FIG. As shown in FIG. 4, it can be held lower than the front shaft 36 (clutch disengagement position).
[0022]
In addition, a bent portion 39a that is bent toward the clutch lever base plate 41 (inside the fuselage) is formed on the upper part of the forward / reverse interlocking plate 39, and the forward / reverse switching lever 23 is operated to the “forward” position. As shown in FIGS. 3 and 4, the clutch base plate 37 is configured to be movable up and down by the biasing force of the spring 40, and the forward / reverse switching lever 23 is in the “reverse” position. When operated, as shown in FIG. 5, the clutch lever base plate 37 is controlled to move upward by being positioned on the front side of the body against the urging force.
[0023]
In the field cultivator T configured as described above, when the forward / reverse switching lever 23 is operated to the “forward” side, the clutch lever base plate 37 rotates freely up and down across the fulcrum position. Therefore, the clutch lever 30 can be held on the entry side. On the other hand, when the forward / reverse switching lever 23 is operated to the “reverse” side, the clutch lever base plate 37 cannot exceed the fulcrum position and is always urged toward the clutch disengagement side. The clutch lever 30 needs to be gripped together with the left frame 1L.
[0024]
Thereby, by requiring a gripping operation of the clutch lever 30 only at the time of reverse travel requiring special attention, compared with a deadman clutch type operation unit that needs to grip the clutch lever 30 together with the forward and backward travel as in the prior art, Labor can be reduced.
[0025]
As another form of the invention, as shown in FIG. 6, the handle member is configured in a loop shape in plan view, and similarly to the above, the accelerator lever 5 is provided on one side of the left and right, and the middle part on the left and right of the handle is provided. An engine stop switch 3 is provided, and an accelerator operation wire 4 and a switch line L1 and a ground line L2 connected to the engine stop switch 3 are integrally formed in the cord cover 6 and routed along the handle frame 1 ′. It is also good.
[0026]
In the example of FIG. 6, a clutch operation handle 30 ′ along the handle 1 ′ is pivotally supported downward by its own weight to both the left and right stoppers 45 at the lower side of the loop handle 1 ′. The configuration is a deadman clutch. This makes it possible to configure the deadman clutch mechanism at a lower cost compared to a configuration in which a conventional spring or the like is used to bias the clutch lever toward the “disengagement” side.
[ 0027 ]
[Brief description of the drawings]
FIG. 1A is a perspective view of a handle portion.
(B) Sectional drawing of a cover member.
FIG. 2 is an overall side view of a field cultivator.
FIG. 3 is a perspective view seen from obliquely below in a state where a clutch lever during forward movement is held in an “off” state.
FIG. 4 is a perspective view seen from obliquely below in a state where a clutch lever during forward movement is held in an “on” state.
FIG. 5 is a perspective view of the clutch lever as viewed from diagonally below when moving backward.
FIG. 6A is a plan view of a handle member showing another embodiment.
(B) The perspective view of the clutch operation part of the handle member which shows another form.
[Explanation of symbols]
T cultivator E engine L1 switch line L2 ground wire 1 handle 1L left frame 1R right frame 1S connecting frame 3 engine stop switch 4 push-pull wire 5 accelerator lever 6 cord cover

Claims (1)

In the walking type tiller with the handle member (1) extended behind the engine (E), the switch member (3) causes the handle member (1) to stop the output of the engine (E) via an electric signal. When the accelerator operation unit pushing and pulling through the increase or decrease adjusts the output of the engine (E) of the wire (4) provided with a (5), the said wire (4) inserted through the cover member (6) in the The wire (L1) connecting the switch member (3) and the ground wire (L2) extending from the switch member (3) are inserted in a symmetrical position around the wire (4), and the wire ( 4) is a walking type cultivator characterized in that it is a metal member having a larger diameter than the electric wire (L1) or the ground wire (L2) .

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