JPH0212876Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a walking-type vehicle equipped with an engine with a centrifugal clutch and wheels driven by the engine, as well as a steering wheel on the rear end side. The present invention relates to an improvement in a soil injection machine configured by mounting the liquid injection device on the vehicle body or communicating with a pump device installed if desired.

As shown in FIG. 1, the soil injection machine A of the above-mentioned form is usually a walking type machine that freely runs on wheels 2 and is equipped with a control handle 10 on the rear end side that is operated by an operator who follows. An engine E with a centrifugal clutch e for driving the wheels 2 is mounted on the vehicle body a, and a mounting frame 1a projecting rearward is mounted on the lower part of the rear end side of the frame 1 of the vehicle body a. A liquid injection device 3 is formed in the frame 1a in the shape of a wheel with a plurality of liquid injection nozzles 31 projecting radially from a central boss portion 30. A chemical liquid is arranged so that the tip side thereof is inserted into the ground, and is pivoted so as to rotate around the central boss part 30, and the chemical liquid is mounted on the vehicle body at the chemical liquid supply port of the liquid injection device 3. A liquid supply device B, which is a combination of a tank and a pump device, whose discharge port is connected via a hose, or a combination of a chemical tank T and a pump device P, and installed at a desired location. is connected to the discharge port of the engine via a long hose 4, and with the fluid supply device B in operation, operate the throttle lever 5 provided on the control handle 10 to open the throttle valve of the engine E. By opening the engine E, the rotational speed of the engine E is increased, and the centrifugal clutch e is brought into contact with the wheels 2, thereby causing the vehicle body a to travel. It is constructed so that it can be penetrated into the ground to inject liquid fertilizer or a chemical solution such as disinfectant into the ground.

By the way, in the walk-behind soil injection machine A configured as described above, chemical solution is constantly supplied to the injection device 3, so that by operating the throttle lever 5, the centrifugal clutch e is "disconnected" and the vehicle body is turned off. There is an inconvenient problem in that the chemical solution continues to be injected into the soil from the nozzles 31 of the injecting device 3 even when the vehicle a stops running. In addition, for this reason, an on-off valve 6 is provided in the middle of the hose 4 that pumps the chemical solution to the liquid injection device 3, and an operating arm that opens and closes the valve is connected to the throttle lever 5 via a release wire. Therefore, if the on-off valve 6 is switched off when the centrifugal clutch e is switched to "disengaged" by operating the throttle lever 5, the chemical solution will continue to be ejected whenever the vehicle body a is driven. As a result, a problem arises in which the chemical solution sprays out unnecessarily even when the user only wants to move the vehicle body a, such as when the vehicle body a is rotated by lifting the liquid injection device 3 above the ground.

The present invention has been made to solve these problems, and the supply of chemical liquid to the liquid injection device 3 mounted on the vehicle body a is controlled by the throttle lever 5.
The on/off control is linked to the switching operation of the centrifugal clutch e between "disengagement" and "contact" by the operation of The purpose is to provide a new means for freely controlling operations.

In the present invention, as a means to achieve this objective, we have developed a walking-type self-propelled vehicle equipped with an engine with a centrifugal clutch and wheels driven by the engine, as well as a steering wheel on the rear end side. A liquid device is installed and an on-off valve is installed to turn on and off the supply of chemical liquid to the liquid injection device,
The throttle lever mounted on the operating handle to operate the throttle valve of the engine is equipped with an arm that rotates together with the throttle lever, and one end of the connecting member is connected to the arm. The part is switchably connected to a position where the part wraps around the rotational axis of the throttle lever and the rotational end of the arm, and the other end of the connecting member is connected to the operating arm of the opening/closing valve. This paper proposes a walking-type soil injection machine featuring the following features.

Next, an example of implementation will be described in detail with reference to the drawings. In addition,
The same reference numerals in the drawings as those in the previous means will be used for the constituent members having the same effect.

Fig. 2 is a perspective view of a walking-type soil injection machine A that can carry out the present invention. engine, 5 is the throttle lever, 6
numeral 8 indicates an on-off valve, numeral 8 indicates a connecting member, and numeral 10 indicates a control handle.

FIG. 3 is a perspective view of the main parts of the soil injection machine A.
In the figure, 10a, 10a are left and right handle bars of the operating handle 10, and 10b is a connecting member that spans these left and right handle bars 10a, 10a.

4 is a hose, and although only the middle part is shown in Figure 3, one end is connected to the supply port of the liquid injection device 3 mounted on the vehicle body a, as shown in Figure 2. However, the other end side is connected and communicated with a discharge port of a pump device P of a liquid supply device B installed at an appropriate location away from the vehicle body a.

The throttle lever 5 is mounted in a shallow bottomed cylindrical support 51 that is assembled with a mounting bracket 50 in the vicinity of the grip part (not shown) of one handle rod 10a of the operating handle 10. A disc-shaped boss 5a installed at the base end of the support 51 is rotatably fitted into the shaft hole formed in the center of the support 51.
The support shaft is rotatably fitted onto a support shaft installed at the center of the support base 51 and connected to the support base 51, so that the support shaft is rotatably rotated around the axis of the support base 51. and,
An inner (not clearly shown in the drawing) of the release wire 7, which has one end of the outer 70 fixed to the peripheral wall of the support 51, is attached to the lower half of the boss portion 5a that fits inside the support 51. One end of the release wire 7 is connected, and the other inner end of the release wire 7 is connected to an operating member of a throttle valve of an engine E equipped with a centrifugal clutch mounted on the vehicle body a, and the throttle lever 5 is Open the throttle valve of engine E by rotating it in the direction of arrow A and pulling the release wire 7.
Further, in FIG. 3, the throttle valve of the engine E is rotated toward the closing side by rotating in the direction of the arrow R to loosen the pull on the release wire 7.

The throttle lever 5 has an arm 5 projecting radially from the upper surface of the boss portion 5a.
2 is integrally installed in the arm 52, and a long hole-shaped guide groove 53 along the longitudinal direction of the arm 52 extends from the region where it overlaps the rotation axis W of the boss portion 5a to the rotation end of the arm 52. It is shaped in a range that extends to the section.

The on-off valve 6 connects the hose 4 from the discharge port of the pump device P of the fluid supply device B to the fluid injection device 3 provided on the vehicle body a.
This valve controls on/off the medicinal solution supplied through the liquid injection device 3 before the liquid injection device 3, and is attached and supported by a connecting member 10b connecting the left and right handle rods 10a, 10a of the operating handle 10. Then, cut off the middle of the hose 4 and connect the hose 4a on the tip side to be connected to the pump device P of the liquid supply device B to the inlet pipe of the on-off valve 6, and connect the base to be connected to the liquid injection device 3. By connecting the hose 4b on the end side to the outlet pipe 60, the supply of the chemical solution to the liquid injection device 3 is controlled on and off in the middle of the hose 4. The on-off valve 6 is opened and closed by the rotation of an operating shaft 61 whose upper end protrudes from the upper surface of the valve case 6a. It opens and closes communication between the primary side communicating with the inlet pipe and the secondary side communicating with the outlet pipe, and the degree of opening of the valve port by the valve element changes depending on the amount of rotation of the operating shaft 61, thereby changing the flow rate. A flow meter 62 for detecting the flow rate of the chemical liquid flowing from the primary side to the secondary side is attached to the valve box 6a, and the base of the actuating arm 63 is attached to the actuating shaft 61. The ends are connected.

The connecting member 8 is a member for connecting the operating arm 63 of the on-off valve 6 and the aforementioned throttle lever 5, and is formed on a link rod.
As shown in the figure, one end is connected to the rotating end of the actuating arm 63 by a connecting shaft 80, and the other end is slidably fitted into the elongated guide groove 53 provided in the arm 52. By connecting to the connecting shaft 81,
The operating arm 63 and the throttle lever 5 are linked via the arm 52, and when the throttle lever 5 is rotated in the direction of arrow A in FIG. 4, the operating arm 63 is rotated by the rotation of the arm 52. Same 4th
It is moved to the "open" position as shown by the chain line in the figure. At this time, by grasping the knob 82 provided on the connecting shaft 81 and moving the connecting shaft 81 toward the proximal end of the guide groove 53, positioning it so that it overlaps with the rotation axis W of the throttle lever 5, The amount of movement of the connecting shaft 81 when the throttle lever 5 is rotated is made zero, and the switch is made to keep the on-off valve 6 closed. This connecting member 8 is constructed by connecting the operating arm 63 of the on-off valve 6 with a spring 83 that biases it toward the closing side as shown by the chain line in FIG. Connecting shaft 8 provided on the side
0 and the connecting shaft 80 that fits into the guide groove 53 of the arm 52.

The embodiment device constructed in this manner operates as follows.

Arm 52 of throttle lever 5 of connecting member 8
If the connecting shaft 81 is moved to the rotation end side of the guide groove 53 to the state shown by the solid line in FIGS. 3 and 4, the throttle valve of the engine E can be opened by operating the throttle lever 5. Then, by increasing the rotation speed and putting the centrifugal clutch e in "contact" position, we can make the car body a run.
The on-off valve 6 is "open" and the medicinal solution is forced to be fed to the liquid injection device 3. And throttle lever 5
further rotate to increase the rotation speed of engine E,
As the traveling speed of the vehicle body a increases, the operating arm 63 of the on-off valve 6 rotates toward the open side, widening the opening of the valve and increasing the amount of chemical solution flowing through. become. At this time, in the guide groove 53,
If a fitting groove is formed in the middle of the longitudinal direction to hold the connecting shaft 81 so that the connecting shaft 81 can be locked there, the flow rate of the chemical solution can be adjusted according to the speed of the vehicle body a. Control can be performed by varying the absolute amount of the chemical solution.

Next, from the above-mentioned state, turn the throttle lever 5 in the direction of the arrow R in FIGS. 3 and 4 to throttle the throttle valve of the engine E and disengage the centrifugal clutch e. The rotation of the actuating arm 63 of the on-off valve 6 in conjunction with the rotation of the twist lever 5 causes the on-off valve 6 to be "closed", thereby cutting off the supply of the medicinal solution to the liquid injection device 3. That is, when the vehicle body a is stopped, the supply of the chemical solution is stopped.

Next, the connecting shaft 81 of the connecting member 8 is slid along the guide groove 53 by operating the knob 82 provided thereon, and when it is positioned at the base end side of the guide groove 53, the throttle lever 5 is rotated. Since the connecting shaft 81 is located at the center of rotation of the boss portion 5a when the connecting member 8 is moved, the connecting member 8 does not move, so the on-off valve 6 does not operate and remains closed. That is, the vehicle body a can travel by freely changing the rotational speed of the engine E while keeping the on-off valve 6 closed.

As explained above, the walking-type soil injection machine according to the present invention is a walking-type self-propelled vehicle equipped with an engine with a centrifugal clutch and wheels driven by the engine, and a control handle on the rear end side. A throttle lever that is equipped with a liquid injection device and an on-off valve that turns on and off the supply of chemical liquid to the liquid injection device, and that is installed on the control handle to operate a throttle valve of the engine. is equipped with an arm that rotates together with the throttle lever, and attaches one end of the linking member to the arm at a position where the connecting portion to the arm wraps around the rotational axis of the throttle lever and the rotation of the arm. The connecting member is switchably connected to the end of the connecting member, and the other end of the connecting member is connected to the operating arm of the on-off valve.
The supply of chemical liquid to the liquid injection device mounted on the vehicle body is
The on/off control is linked to the operation of the throttle lever to switch the centrifugal clutch between ``disengagement'' and ``on''. Operation control can be performed freely.

[Brief explanation of drawings]

Figure 1 is an overall explanatory diagram of the walking-type soil injection machine.
FIG. 2 is a perspective view of the entire apparatus according to an embodiment of the present invention, FIG. 3 is a perspective view of the main parts of the same, and FIG. 4 is a plan view of the main parts of the same. Explanation of drawing symbols, A... Soil injection machine, B... Liquid supply device, E... Engine with centrifugal clutch, P...
... Pump device, T ... Chemical tank, W ... Rotation axis, a ... Vehicle body, e ... Centrifugal clutch, 1 ... Frame, 1a ... Mounting machine frame, 10 ... Control handle, 10a ... Handle Rod, 10b... Connecting member, 2... Wheel, 20... Axle, 2... Wheel, 3
...Liquid injection device, 30...Center boss part, 31...Liquid injection nozzle, 4...Long hose, 4a...Hose on the distal end side, 4b...Hose on the proximal end side, 5...Throttle lever, 5a...Boss part, 50...Mounting bracket, 51...Abutment, 52...Arm, 53...Guide groove, 6...Opening/closing valve, 6a...Valve box, 60...
Outlet pipe, 61... Operating shaft, 62... Flow meter, 63
... Actuation arm, 7 ... Release wire, 70
... Outer, 8 ... Connecting member, 80, 81 ...
Connection shaft, 82...knob, 83...spring.

Claims (1)

[Scope of utility model registration request] A walking-type self-propelled vehicle equipped with an engine with a centrifugal clutch and wheels driven by the engine and a control handle on the rear end side is equipped with a liquid injection device and is capable of supplying chemical liquid to the liquid injection device. The throttle lever, which is equipped with an on-off valve that turns on and off and is installed on the control handle to operate the throttle valve of the engine, is equipped with an arm that rotates together with the throttle lever, and the arm is equipped with an arm that rotates together with the throttle lever. One end of the connecting member is switchably connected to a position where the connecting portion to the arm wraps around the rotational axis of the throttle lever and the rotating end of the arm, and the other end of the connecting member is connected to the rotating end of the arm. A walking type soil injection machine, characterized in that it is connected to an operating arm of the on-off valve.