JP3598156B2 - Emergency stop device for traveling work equipment - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to an emergency stop device for a traveling work machine such as a cultivator.
[0002]
[Prior art]
If you feel danger while operating a mobile work machine, you must stop the machine immediately. For this reason, many devices are equipped with an emergency stop device that operates by an operation different from a normal stop operation. This emergency stop device also eventually stops the engine, but due to inertia of the engine and the power system, even if this operation is performed, the machine does not stop immediately. Therefore, the main clutch is disengaged in conjunction with this operation.
[0003]
[Problems to be solved by the invention]
By the way, in many cases, the emergency stop operation can be performed by one operation such as a tapping operation of a knob, but depending on the operating posture, this operation may not be performed immediately.
The present invention solves such a problem, and includes another emergency stop device that can be easily operated even in a control posture that is difficult to operate with a conventional emergency stop device, and in any control posture. In any case, it is an emergency stop.
[0004]
[Means for Solving the Problems]
Under the above-mentioned problems, the present invention provides a traveling work machine in which an engine speed control operation device is attached to one of two left and right steering handles and a main clutch on / off operation device is attached to the other. while attached emergency stop knob device, passing the emergency stop wire between engine speed control operating unit and the main clutch Nyusetsu operating device over, the emergency stop knob beating operation or an emergency stop wire pulling operation of the The present invention provides an emergency stop device for a traveling work machine characterized by operating the engine speed control operation device to the engine stop position side and operating the main clutch on / off operation device to the disconnection side by any one of them.
[0005]
Further, according to the present invention, in the above configuration, the engine speed control operating device and the main clutch on / off operating device are connected by an appropriate linking tool, and the emergency stop wire also serves as the linking tool. An emergency stop device, an engine speed control operating device, an accelerator lever which is always elastically biased toward the engine stop position and is rotatably provided, and a certain resistance to rotation of the accelerator lever when engaged with the accelerator lever. And an engaging lever which is attached to the accelerator lever so as to be disengageable from the resistor and which is always engaged with the resistor and turned on its own. The tapping operation of the emergency stop knob and the emergency stop The present invention also provides an emergency stop device in which the operation of pulling the wire is converted to the operation of releasing the engagement lever from the resistor.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 8 is a plan view around the rear part of the traveling work machine, and FIG. 9 is a rear view. In the rear part of the walking-type traveling work machine, two steering handles 10 are provided by bridging the transfer handle 12. An engine speed control operation device 14 is provided on one of the handles 10, and a main clutch on / off operation device 16 is provided on the other of the handles.
[0007]
FIG. 1 is a plan view of the engine speed control operating device 14, and FIGS. 2 to 4 are longitudinal sectional views. The engine speed control operating device 14 in this embodiment is attached to an accelerator lever 18 and the accelerator lever 18. It is composed of an engagement lever 20, a resistor 22 and the like to which the engagement lever 20 can be disengaged. The accelerator lever 18 controls the engine speed. The accelerator lever 18 is connected to an accelerator wire 24 and is configured to be horizontally rotatable about a vertical axis 26. The accelerator lever 18 is moved from a high speed position (a) to a low speed position (b). Then, it rotates over the range of the stop position (c).
[0008]
That is, when the accelerator lever 18 is brought to these positions, the engine stops at the highest speed and the lowest speed and stops. When the accelerator lever 16 is rotated toward the high-speed position (a), the accelerator lever 16 is opposed to the rewind spring 28. Unless the accelerator lever 16 is engaged with the resistor 22, the urging force causes the stop position (c). It is a mechanism to rotate up to.
[0009]
The engagement lever 20 is attached to the accelerator lever 18 so as to be rotatable around a support shaft 30 provided on the accelerator lever 18. The engagement lever 20 is rotated and its tip is disengaged from a resistor 22 described later. is there. In addition, the upper part of the portion of the tip of the engagement lever 20 which engages with the resistor 22 has a certain concave / convex shape 32 whose upper and lower central positions are recessed and whose upper and lower parts protrude so as to be disengageable from a disk body described later. However, the reason will be described later. Further, the engagement lever 20 is always engaged with the resistor 22 by the return spring 34 without permission.
[0010]
The resistor 22 has a concave groove 22 a formed on the outer periphery with which the engaging lever 20 can be engaged, and is provided below the accelerator lever 18 so as to be rotatable around a vertical axis 26. A large resistance (larger than the resistance of the rewind spring 28) is applied to the rotation by the disc spring 36 and the like. In a normal case, the engagement lever 20 is always engaged with the resistor 22 by the return spring 34. Therefore, when the accelerator lever 18 is rotated in this state, the rotation in either the high-speed side or the low-speed side is performed. Also receives the resistance of the resistor 22, whereby the accelerator lever 18 can be held at an arbitrary position.
[0011]
As described above, the accelerator lever 18 is rotated between the high-speed position (a) and the low-speed position (b) in order to obtain a desired engine speed. On the other hand, on the low-speed position (b) side of the accelerator lever 18, a stopper 38 that regulates further rotation of the engagement lever 20 is provided below the resistor 22. Therefore, when trying to rotate the accelerator lever 18 to the stop position (C), the engagement lever 20 must be removed from the resistor 22.
[0012]
An emergency stop knob 40 is attached to the engine speed control operation device 14 having the above configuration. The knob 40 is provided with the longitudinal axis 26 and the disk 42 connected to each other below the knob 40, and these knobs move up and down as a whole. It always returns to the vertical center position (neutral position). When the knob 40 is at the neutral position, the disc body 42 is inserted into the concave at the upper and lower center of the concave-convex shape 32 of the engaging lever, and in this state, the engaging lever 20 does not receive an external force, and its tip is It is engaged with the resistor 22.
[0013]
A rotatable horizontal shaft 46 and a lever 48 fixed to the horizontal shaft 46 are provided near the disk 42. The disk 42 and the horizontal shaft 46 are connected by a coupling 49. ing. Accordingly, the lever 48 rotates around the horizontal axis 46 in conjunction with the vertical movement of the knob 40, that is, the disk body 42. The lever 48 is connected with a linking device 50 which is linked with the main clutch on / off operation device 16. In this example, the linking device 50 is also used as an emergency stop wire 50 described later which is operated at the time of emergency stop. . The vertical movement of the disk body 42 and the function of the wire 50 will be described later. Note that when the knob 40 is in the neutral position, the lever 48 is oriented right beside (the state shown in FIG. 2), and the wire 50 is not operated.
[0014]
When the knob 40 is hit from above in this state, the disk body 42 is lowered and acts on the protruding portion of the concave-convex shape 32 of the engagement lever 20 (state in FIG. 3). Then, the engagement lever 20 is rotated around the support shaft 30 and detaches from the resistor 22 (also the stopper 38). When this operation is performed, the accelerator lever 18 is turned to the stop position (C) at a stroke by the action of the rewind spring 28 at any position, and the fuel supply of the engine is cut off and stopped. Therefore, the engine can be stopped urgently only by hitting the knob 40 from above.
[0015]
Next, when the knob 40 moves down as described above, the lever 48 pivots upward in conjunction with this (see FIG. 3), so that the wire 50 is pulled and this movement is attached to the other handle 10. The main clutch lever is transmitted to the main clutch on / off operation device 16 to operate the main clutch lever to the disengagement side. Stopping the engine alone does not stop the engine immediately due to inertia or the like. This is to compensate for this and to surely stop the running of the machine.
[0016]
5 and 6 are side views of the main clutch on / off device operating device 16 and FIG. 7 is a plan view. In this embodiment, the main clutch on / off operating device 16 is rotatable about a horizontal axis 52. The plate 54, the main clutch lever 56 integrated with the rotating plate 54, the cam plate 58 pushed by the rotating plate 54 and rotating around the horizontal shaft 52, and the other end of the wire 50 are connected. The fan plate 62 is slidably in contact with the cam plate 58 and rotates around the support shaft 60.
[0017]
The cam plate 58 constantly biases the rotating plate 54, that is, the main clutch lever 56 to the cutting position (a) side by a spring 64, and the fan plate 62 also constantly biases the cam plate 58 by a spring 66. Is pressed. When the main clutch lever 56 is in the engagement position (b) (the state shown in FIG. 6), the rotating plate 54 and the cam plate 58 rotate forward, but at this time, the cam follower attached to the fan plate 62 Reference numeral 68 is adapted to fit into the concave portion of the cam plate 58 to maintain this state. At this time, the length and the like are adjusted so that the wire 50 is not pulled.
[0018]
In addition, a half-moon link 72 for connecting an operation wire 70 for turning on / off the main clutch is attached to the turning plate 54, and the turning plate 54, that is, the main clutch lever 56 is set to the cutting position (a). Then, if the operation wire 70 is loosened and the main clutch is disengaged and set to the engagement position (b), it goes without saying that the operation wire 70 is pulled and the main clutch is engaged.
[0019]
In the above state, when the knob 40 is hit and moved downward, the disc body 42 is pushed down and the lever 48 is turned. Then, the wire 50 is pulled, and the fan plate 62 rotates backward around the support shaft 60 to disengage with the cam plate 58. Therefore, the cam plate 58 rotates backward by the force of the spring 64, At this time, the rotating plate 54, that is, the main clutch lever 56 is rotated backward to return it to the disengaged position (a), and the main clutch is disengaged (the state of FIG. 5). The movement of the main clutch lever 56 between the disengaged position (a) and the engagement position (b) has a structure beyond a dead point which does not require a large force.
[0020]
On the other hand, the above-mentioned return of the main clutch lever 56 to the disconnection position (a) can be performed only by pulling the wire 50. That is, when the wire 50 is pulled, the fan plate 62 rotates rearward and disengages from the cam plate 58, so that the main clutch lever 56 returns to the disconnection position (a) as described above. Since this operation simultaneously rotates the lever 48 to push up the disk 42, the engagement lever 20 is removed from the resistor 22 and the like, and the accelerator lever 18 is brought to the stop position (C). That is, whether the knob 40 is hit or the wire 50 is pulled, the engine is stopped and the main clutch is simultaneously disconnected.
[0021]
By the way, the above-described wire 50 is covered with an appropriate outer cable 74 or the like, and is provided in a state where it is appropriately hung below the above-described transit handle 12. Anything is easy to pull. In addition, a switch 76 that is activated by the main clutch lever 56 when the main clutch lever 56 is at the disengaged position (a) to allow the engine to start is provided near the rotating plate 54. The main clutch auxiliary lever which can be operated with is provided. All are members provided for safe operation and operation.
[0022]
【The invention's effect】
As described above, according to the present invention, the engine is stopped and the main clutch is disconnected by either hitting the emergency stop knob or pulling the emergency stop wire. Therefore, even in a maneuvering posture in which the knob is difficult to hit (in the case where the distance between the knob and the operator becomes longer due to the handle lifting up or the operator bending over the body), it is ensured. The machine can stop running. In particular, since the wire is hung in front of the pilot, this pulling is easy regardless of the steering posture.
[0023]
Further, in this configuration, the emergency stop wire also serves as a linking device that connects the engine speed control operating device and the main clutch on / off operating device, so that the number of parts is reduced and the manufacturing cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a plan view of an engine speed control operating device showing an example of the present invention.
FIG. 2 is a cross-sectional side view of an engine speed control operation device showing an example of the present invention.
FIG. 3 is a cross-sectional side view of an engine speed control operating device showing an example of the present invention.
FIG. 4 is a cross-sectional side view of an engine speed control operating device showing an example of the present invention.
FIG. 5 is a side view of a main clutch on / off operation device showing an example of the present invention.
FIG. 6 is a side view of a main clutch on / off operation device showing an example of the present invention.
FIG. 7 is a partial sectional plan view of a main clutch on / off operation device showing an example of the present invention.
FIG. 8 is a plan view of an engine speed control operation device and a main clutch on / off operation device showing an example of the present invention.
FIG. 9 is a rear view of the engine speed control operation device and the main clutch on / off operation device showing an example of the present invention.
[Explanation of symbols]
Reference Signs List 10 steering handle 14 engine speed control operating device 16 main clutch on / off operating device 18 accelerator lever 20 engaging lever 22 resistor 40 emergency stop knob 50 emergency stop wire

Claims (3)

An emergency stop knob is attached to the engine speed control operating device in a traveling work machine in which the engine speed control operating device is mounted on one of the two left and right steering handles and the main clutch on / off operating device is mounted on the other. The emergency stop wire is passed between the engine speed control operating device and the main clutch on / off operating device, and the engine speed control operating device is operated by either hitting the emergency stop knob or pulling the emergency stop wire. An emergency stop device for a traveling work machine, wherein the main clutch ON / OFF operation device is operated to a disengagement side while being operated to an engine stop position side. The emergency operating device according to claim 1, wherein the engine speed control operating device and the main clutch on / off operating device are connected by an appropriate linking device, and the emergency stop wire also serves as the linking device. Stop device. An engine speed control operating device, an accelerator lever that is always elastically biased toward the engine stop position and is rotatably provided; It consists of an engagement lever that is detachably attached to the resistor on the accelerator lever, and is always engaged with the resistor without permission.Both the tapping operation of the emergency stop knob and the pulling operation of the emergency stop wire, The emergency stop device for a traveling work machine according to claim 1 or 2, wherein the operation is changed to an operation of releasing the engagement lever from the resistor.

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