JPH11155337A - Powered working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a powered working machine capable of preventing the apparatus breakage, energy loss, etc., caused by the maloperation of an output operation member and a braking operation member. SOLUTION: A pair of output operation restriction parts and a pair of braking operation restriction parts are placed between an output operation system 12-13-14 to control the output of a power source 3 to a power working member 2 and a braking operation system 10-15-16 to stop the motion of the power working member 2. The output operation restriction parts are brought into contact with each other to restrict the output operation to the power working member by the output operation member 12 when the power working member 2 is in braked state. The braking operation restriction parts are brought into contact with each other to restrict the breaking operation of the power working member 2 by the braking operation member 10 when power is transmitted from the power source 3 to the power working member 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power working machine, and more particularly, to a power working machine having an output operating system for controlling output to a power working member and a braking operation system for stopping the operation of the power working member. About the machine.

[0002]

2. Description of the Related Art For example, in a brush cutter which is a kind of a power working machine, even if an operator operates an output operating member to stop output to a cutting blade which is a power working member, the cutting blade is still operated. Try to keep moving by inertia. For this reason, there has been proposed a brush cutter in which a braking operation member for rapidly stopping the operation of the power working member is provided to improve work safety.

[0003]

Incidentally, in the above-described brush cutter, an erroneous linking operation between the output operation member and the brake operation member may lead to damage to the device. For example, if the braking operation member for rapidly stopping the power working member is accidentally operated while the output of the power source to the power working member is maintained, it is impossible to apply a drive system or a braking system of the device. This causes problems such as damage to the device and energy loss. The same applies to a case where the output operation member is erroneously operated in the output increasing direction while the power working member is being braked.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a power working machine capable of preventing damage to an apparatus, energy loss, and the like due to erroneous operation of an output operation member and a brake operation member. .

[0005]

According to a first aspect of the present invention, there is provided a power working machine for controlling the output of a power source to a power working member; When the power working member is in a braking state between the power operating member and a braking operation system that stops the operation of the working member, the power operating member abuts on each other to regulate an output control operation on the power working member by the output operating member. And a pair of braking operation restricting portions that abut against each other and restrict a braking operation of the power working member by a braking operation member in an output state from the power source to the power working member. It is a thing.

According to the first aspect of the present invention, when the power working member is in the braked state, even if an attempt is made to output to the power working member, the power working member is placed between the output operation system and the braking operation system. Since the output operation restricting portions provided as a pair abut against each other, the output operation member cannot be operated unless the braking of the power working member is released by operating the braking operation member. Further, in an output state of the power source to the power working member, even if the power working member is to be stopped, the braking operation restriction provided as a pair between the output operation system and the braking operation system. Since the parts contact each other, the brake operating member cannot be operated unless the output operation member is operated to stop the output to the power working member. As described above, according to the power working machine of the present invention, there is no room for erroneous operation of the output operation member and the braking operation member, so that there is no problem such as breakage of the device or energy loss.

According to a second aspect of the present invention, in the power working machine according to the first aspect, the output control member of the power source is operated by an output operation interlocking member interlocked with the output operation member. The braking operation member is operatively connected to the braking operation interlocking member which is interlocked with the braking operation member, and the output operation interlocking member and the braking operation interlocking member are respectively connected to the output operation restricting portion and the braking operation restricting member. The parts are provided in pairs.

In this case, when the output operation member is operated, the output operation interlock member moves in conjunction therewith, and the output control member is operated in accordance with the movement of the output operation interlock member. On the other hand, when the braking operation member is operated, the braking operation interlocking member moves in conjunction therewith, and the braking action member is operated with the movement of the braking operation interlocking member. The output operation interlocking member and the braking operation interlocking member provided in pairs with the output operation interlocking member and the braking operation interlocking member abut each other to alternately move the interlocking member of the other party. Accordingly, erroneous operation of the output operation member and the braking operation member is prevented.

According to a third aspect of the present invention, there is provided a power working machine according to the first aspect, wherein the output operation interlocking member interlocked with the output operation member is provided with an output control member of the power source. While being connected, the braking operation member and the braking operation interlocking member are connected to the braking operation member via separate paths, and the output operation interlocking member and the braking operation interlocking member are respectively connected to the output operation restricting portion and the braking operation interlocking member. This is provided as a pair with a braking operation restricting section.

A difference from the second aspect is a connection relationship between the braking operation member, the braking operation interlocking member, and the braking action member. That is, according to the third aspect, when the braking operation member is operated, the braking operation interlocking member and the braking operation member are operated together on separate paths.

According to a fourth aspect of the present invention, there is provided a power working machine comprising: an output operating member for controlling an output of a power source to a power working member; and an output operating interlocking member interlocked with the output operating member. A power working machine comprising: a braking operation member for operating a braking device of the power working member; and a braking operation interlocking member interlocked with the braking operation member, wherein the output operation interlocking member and the Between the braking operation interlocking member, when the power working member is in a braking state, an output operation restricting portion that abuts each other and regulates an output control operation on the power working member by the output operating member is paired. And a braking operation restricting portion that abuts on each other and restricts the braking operation of the power working member by the braking operation member in an output state from the power source to the power working member. Those were.

In this case, when the operator operates the output operation member in the output increasing direction, the output operation interlocking member moves, and the output from the power source to the power operation member is started. In this state, even if the braking operation member is erroneously operated in the braking direction, the braking operation restricting portions provided in pairs with the output operation interlocking member and the braking operation interlocking member abut against each other. The braking operation member cannot be operated. Before attempting to operate the braking operation member in the braking direction, the operator is forced to return the output operation member to the output stop direction. This prevents the device from being damaged and prevents wasteful output.

On the other hand, when the operator operates the braking operation member in the braking direction, the braking operation interlocking member moves, and the power working member is braked by the braking device. In this state, even if the output operation member is erroneously operated in the output increasing direction, the output operation restricting portions provided in pairs with the output operation interlocking member and the braking operation interlocking member abut against each other. The output operation member cannot be operated. Before attempting to operate the output operation member in the output increasing direction, the operator is forced to return the braking operation member to the braking release direction. This prevents the device from being damaged and prevents wasteful output.

A power working machine according to a fifth aspect of the present invention is the power working machine according to any one of the first to fourth aspects,
An internal combustion engine is provided as the power source, and between the pair of output operation restricting portions, when the power working member is in a braking state, the power working member is not operated,
An engine start assist gap is provided to allow only a predetermined amount of movement of the output operation member so that the throttle valve of the carburetor can be opened to such an extent that the engine can be started smoothly.

In this case, when starting the engine, for safety, the braking operation member is operated to keep the power working member in a braking state. And
Within the range corresponding to the engine start assist clearance, the output operation member is operated as necessary to open the throttle valve. This makes it easier to start the engine.

A power working machine according to a sixth aspect of the present invention is the power working machine according to any one of the second to fifth aspects,
The output operation interlocking member and the braking operation interlocking member are arranged in the extending direction of the operation rod that supports the power working member,
And it is arranged close to the operation rod. With this configuration, it is possible to minimize the protrusion of the operation rod in a direction perpendicular to the extending direction of the operation rod caused by providing the output operation interlocking member and the braking operation interlocking member. Can be made thinner, thereby improving operability.

A power working machine according to a seventh aspect of the present invention is the power working machine according to any one of the second to sixth aspects,
The output operation interlocking member and the braking operation interlocking member are swingable. In this case, the output operation interlocking member and the braking operation interlocking member both move in an arc, so that their operation is smooth,
Compared to moving linearly, within a smaller occupation area,
Since a large moving distance between the pair of braking operation restricting sections and the pair of output operation restricting sections can be ensured, a compact configuration can be achieved.

According to an eighth aspect of the present invention, in the power working machine according to the seventh aspect, the braking operation restricting portion is formed in an arc shape centered on a swing center of the output operation interlocking member. It has a part. With this configuration, the braking operation of the power working member by the braking operation member at the time of driving the power working member is reliably performed corresponding to the entire range of the magnitude of the output of the power source to the power working member. Can be regulated.

A power working machine according to a ninth aspect of the present invention is the power working machine according to any one of the first to eighth aspects,
A housing is provided for accommodating the output operation interlocking member and the braking operation interlocking member. According to this configuration, the output operation interlocking member and the braking operation interlocking member are covered by the housing, so that their operations are not obstructed from the outside, and the operations of those members are obstructed by work. There is no problem such as becoming.

According to a tenth aspect of the present invention, in the power working machine according to the ninth aspect, a transmission member connected to the output operation interlocking member and the braking operation interlocking member is provided in the housing. The connecting positions of the transmission members to the output operation interlocking member and the braking operation interlocking member are shifted from each other so as not to contact each other. With this configuration, the transmission members do not contact each other in the housing, so that the transmission of the driving force to the output operation interlocking member and the braking operation interlocking member is improved, and the transmission members are Wear can also be prevented.

According to an eleventh aspect of the present invention, there is provided the power working machine according to the ninth or tenth aspect, wherein the housing includes a first case piece for supporting the braking operation interlocking member, and an output operation member. It is formed by combination with a second case piece that supports the interlocking member. With this configuration, for example, the first case piece supports the braking operation interlocking member, and the second case piece supports the output operation interlocking member. The assembly work is completed only by combining the case pieces with each other. Therefore, the assembling work becomes easy.

A power working machine according to a twelfth aspect of the present invention is the power working machine according to the eleventh aspect, wherein at least one of the case pieces is integrally formed with another component of the working machine. Things. This facilitates the manufacture and assembly of the working machine.

According to a thirteenth aspect of the present invention, in the power working machine according to the ninth or tenth aspect, the housing is formed by a combination of a plurality of case pieces. Is formed integrally with other components of the working machine. Also in this case, manufacturing and assembling of the working machine become easy.

According to a fourteenth aspect of the present invention, there is provided a power working machine according to any one of the first to eighth aspects, wherein the operating rod supporting the power working member is connected to the operating rod. The output operation interlocking member and the braking operation interlocking member are disposed between the output operation member and the operation handle having the braking operation member.

According to this configuration, the transmission member extending from the output operation interlocking member and the braking operation interlocking member can be disposed in close contact with the operation handle and the operation rod. The whole device can be made compact and compact, and the operability can be improved without the transmission member interfering with work.

According to a fifteenth aspect of the present invention, there is provided a power working machine according to any one of the ninth to thirteenth aspects, wherein the operating rod supporting the power working member is connected to the operating rod. And the housing is disposed between an operation handle having the output operation member and the braking operation member. In this case, the same operation and effect as those of the fourteenth aspect can be obtained.

According to a sixteenth aspect of the present invention, there is provided the power working machine according to the fifteenth aspect, wherein an operation handle mounting member for mounting the operation handle to the operation rod is connected to each other. A side mounting member and an operation handle side mounting member are formed, and the operation rod side mounting member and the operation handle side mounting member are made to be capable of changing a coupling angle position with each other. If you do this,
For example, when the working machine is stored or transported, the operating angle of the operation handle with respect to the operation rod is appropriately adjusted, and the outline of the entire working machine is changed to a more compact one. It can improve the handling at the time and transportation.

A power working machine according to a seventeenth aspect of the present invention is the power working machine according to the sixteenth aspect, wherein the power rod and the operation handle side mounting member are fitted to each other between the operation rod side mounting member and the operation handle side mounting member. The operating rod-side mounting member and the operating handle-side mounting member form a plurality of fitting portions that enable the operating rod-side mounting member and the operating handle-side mounting member to be coupled to each other at a plurality of angular positions. Are separable from each other by fastening means.
In this case, the operation of adjusting the mounting angle of the operation handle with respect to the operation rod is facilitated. That is, loosening the tightening means, changing the mutual fitting position between the plurality of fitting portions, and then simply tightening the tightening means again to change the mounting angle of the operation handle with respect to the operation rod. Because it can be.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

<First Embodiment> FIG. 1 is an overall schematic perspective view showing a brush cutter as an example of a power working machine according to a first embodiment of the present invention. The brush cutter has a rotary cutting blade 2 as a power working member at a front end of an operation rod 1 extending in the front-rear direction, and a small air-cooled two-cycle as a power source at a rear end of the operation rod 1. An internal combustion engine 3 is provided. The driving force of the engine 3 is transmitted to the cutting blade 2 via a transmission shaft 4 inserted into the operation rod 1. An appropriate type of centrifugal clutch 5 is interposed between the engine 3 and the transmission shaft 4, and when the rotation speed of the engine 3 exceeds a predetermined value, the rotational driving force of the engine 3 reduces the cutting force. The data is output to the blade 2.

A hanging bracket 6 is attached to a portion of the operation rod 1 close to the engine 3. By hanging a shoulder strap (not shown) on the hanging bracket 6, the operator can hold the brush cutter with a shoulder.

A substantially U-shaped operation handle 8 is fixed to the operation rod 1 by an operation handle mounting member 7 of an appropriate type. A brake lever 10 as a braking operation member is attached to a left grip 9 of the operation handle 8, and a throttle lever 12 as an output operation member is attached to a right grip 11 of the operation handle 8.

The throttle lever 12 is operatively connected to a throttle valve 14a of a carburetor 14, which is an output control member of the engine 3, via a Bowden cable 13 for throttle operation which can be pushed and pulled. Here, the throttle valve 14a is always urged by a return spring (not shown) in a direction in which the throttle valve 14a is automatically returned in the idling rotation opening direction, and the inner wire 3 of the throttle operation Bowden cable 13 connected thereto is connected to the throttle valve 14a.
When the throttle valves 8 and 40 (see FIG. 3) are pulled from the non-operation state by the gripping operation of the throttle lever 12, the throttle valve 14a opens from the idle rotation opening in the direction of increasing the speed of the engine 3 (output increase). It's getting started. Further, the throttle lever 12 is provided with a lever position holding mechanism at an arbitrary output level, so that an arbitrary output level of the engine 3 is maintained even when an operator releases his / her finger from the throttle lever 12. Has become.

On the other hand, the brake lever 10 is connected to a brake device 16 via a Bowden cable 15 for braking operation.
Operatively connected to The type of the brake device 16 is arbitrary. The illustrated brake device 16 is of a wedge type, and includes a brake shoe 17 urged to press the plate surface of the cutting blade 2 from above as a braking action member. The inner wires 29, 31 of the Bowden cable 15 for braking operation (see FIG. 3) are moved toward the cutting blade 2 by a biasing force applied to the brake shoe 17 by a braking spring (not shown) toward the braking position. And it is always urged. When the brake lever 10 is released, the brake shoe 17 comes into contact with the upper surface of the cutting blade 2 so that the cutting blade 2 is in a braking state. When the brake lever 10 is grasped so as to be attached to the inner wire 9, the inner wires 29,
31 is pulled, and the brake shoe 17
Is retracted to a braking release position away from the upper surface of the vehicle.

A throttle operation system as an output operation system from the throttle lever 12 to the throttle valve 14a and a braking operation system from the brake lever 10 to the brake device 16 are controlled by a control linkage mechanism 18 described below. Are linked to each other.

FIG. 2 is an exploded perspective view of the operation handle mounting member 7 as viewed from the direction of arrow A in FIG. 1, FIG. 3 is an exploded perspective view of the control linkage mechanism, and FIGS. FIG. 6 is an explanatory view showing an operation state of the mechanism 18, and FIG. 6 is an explanatory view corresponding to FIG.

The control linkage mechanism 18 is shown in FIGS.
As shown in FIG.
The first case piece 20 and the second case piece 21 are formed. As shown in FIG. 3, a first support shaft 22 also serving as a case fastening bolt is projected downward in the upper first case piece 20, and the first support shaft 22 has a triangular plate-shaped brake. An operation system swing member 23 is swingably attached.

On the other hand, a second support shaft 24 also serving as a case tightening bolt is protruded upward in the lower second case piece 21, and the second support shaft 24 has an output operation system swinging. A triangular plate-shaped throttle operation system swing member 25 as a member is swingably attached.

As shown in FIG. 2, the braking operation system oscillating member 23 and the throttle operation system oscillating member 25 are both housed inside the housing 19. Therefore, there is no problem that the swinging operation of each of the swinging members 23 and 25 is hindered from the outside, and there is no problem that the swinging operation of each of the swinging members 23 and 25 becomes an obstacle to the work.

The housing 19 includes the first case piece 20 for supporting the braking operation system swinging member 23,
It is formed by a combination with the second case piece 21 that supports the throttle operation system swing member 25. For this reason, for example, the first case piece 20 supports the braking operation system swinging member 23, and the second case piece 21 supports the throttle operation system swinging member 25. The assembling work is completed only by combining the piece 20 and the second case piece 21 with each other and connecting them with the bolts 22 and 24. Therefore, the assembling work is easy.

The housing 19 may be attached to an appropriate position, such as the lower surface of the rear portion of the operation rod 1, which does not hinder the operation, by using an appropriate fixing means. Furthermore, if the housing 19 is at least partially formed integrally with the components of the bush cutter, it is easy to form and assemble, which is more preferable. For example, in the present embodiment, as shown in FIG. 2, the upper first case piece 20 of the housing 19 is integrally formed with a part 7a of the operation handle mounting member 7.

As shown in FIG. 3, the braking operation system swinging member 23 has two swinging ends 26 and 27 which are in a positional relationship perpendicular to each other about the first support shaft 22. One end 29a of an inner wire 29 of a first Bowden cable 28 for braking operation that constitutes the Bowden cable 15 for braking operation is connected to the one end 26 of the swing, and the other end 29b of the inner wire 29 is connected to the other end 29b. Is connected to the brake lever 10 as shown in FIG.

On the other hand, together with the first Bowden cable 28 for braking operation, the Bowden cable 15 for braking operation
One end 31a of the inner wire 31 of the second Bowden cable 30 for braking operation constituting the brake operation (see FIG. 1) is connected, and the other end 31b of the inner wire 31 is connected to the brake as shown in FIG. It is connected to the brake shoe 17 constituting the device 16. The inner ends 32a, 33a of the outer tubes 32, 33 of the first Bowden cable 28 for braking operation and the second Bowden cable 30 for braking operation are fixed to the first case piece 20 by appropriate means. I have.

As described above, the inner wires 29, 31 of the Bowden cable 15 for braking operation are constantly moved toward the cutting blade 2 by the biasing force applied to the brake shoe 17 toward the braking position. And it is urged to pull. Accordingly, when the brake lever 10 is released, the braking operation system swinging member 23 maintains the braking posture shown in FIG. Then, when the operator moves the brake lever 10 in a braking direction (for example, a direction in which the brake lever 10 is attached to the left grip 9), the braking operation system swinging member 23 is moved in conjunction with the operation. It swings around one support shaft 22 and assumes a braking release posture shown in FIG. When the operator releases the brake lever 10,
The braking operation system swinging member 23 includes the brake shoe 1.
Due to the urging force applied to the braking position given in FIG. 7, the arm 7 swings around the first support shaft 22 in the opposite direction, and returns to the braking posture shown in FIG.

As shown in FIG. 3, the throttle operating system swinging member 25 has two swinging ends 35 and 36 which are in a positional relationship perpendicular to each other about the second support shaft 24.
It has. One end 38a of an inner wire 38 of a first Bowden cable 37 for throttle operation, which constitutes the Bowden cable 13 for throttle operation, is connected to the one end 35 of the swing.
The other end 38b of the lever 8 is connected to the throttle lever 12, as shown in FIG.

On the other hand, the throttle operation swinging member 25
At the other end 36 of the swing, an inner wire 40 of a second Bowden cable 39 for throttle operation which constitutes the Bowden cable 13 for throttle operation (see FIG. 1) together with the first Bowden cable 37 for throttle operation.
Is connected to one end 40a of the other end 40b.
Is connected to the throttle valve 14a as shown in FIG. Inner ends 41 of the outer tubes 41 and 42 of the first Bowden cable 37 for throttle operation and the second Bowden cable 39 for throttle operation.
a and 42a are fixed to the second case piece 21 by appropriate means.

When the throttle lever 12 is at the output stop position, the throttle operation system swinging member 25 maintains the non-output state shown in FIG. And
When the operator moves the throttle lever 12 in the output increasing direction, the throttle operation system swinging member 25 swings about the second support shaft 24 in conjunction with the operation, and FIG. The posture at the time of output shown in FIG.

The braking operation system oscillating member 23 and the throttle operation system oscillating member 25 come into contact with each other at a predetermined time to regulate the movement of the other member, so that the brake lever 10 moves in the braking direction. The braking operation restricting portions 45 and 46 and the output operation restricting portion 4 for alternately restricting the operation or the operation of the throttle lever 12 in the output increasing direction.
7, 48 are provided in pairs.

That is, as shown in FIG. 3, a throttle lever operation restricting portion 47 projecting downward is provided on the lower surface of the braking operation system rocking member 23 as the output operation restricting portion. The throttle operation interlocking member 25 is provided on its upper surface with a contact portion 48 that protrudes upward and contacts the throttle lever operation restricting portion 47. Therefore, when the brake device 16 is in the braking state, even if the throttle lever 12 is erroneously moved in the output increasing direction, the abutment portion 48 of the throttle operation system swinging member 25 causes the braking operation system to move. Since the rotation member 23 comes into contact with the throttle lever operation restricting portion 47 of the swing member 23, the rotation speed of the engine 3 becomes equal to or higher than a predetermined value, and the centrifugal clutch 5 is connected to start the output to the cutting blade 2. The throttle lever 12 cannot be moved (see FIG. 4).

In this embodiment, as shown in FIG. 4, the engine is moved between the pair of output operation restricting portions 47 and 48 by a predetermined swing angle α of the throttle operation system swing member 25. A start assist gap S is provided. The gap S
When the brake device 16 is in the braking state, the output to the cutting blade 2 is not started, but the throttle valve 14 can be opened to the extent that the engine 3 can be started smoothly. This allows a slight movement of the throttle lever 12 in the direction of increasing the output.

In this case, when the engine 3 is started, the brake lever 10 is released,
The cutting blade 2 is in a braking state. Then, within the range corresponding to the engine start assist gap S, if necessary,
By operating the throttle lever 12 in the direction of increasing the output,
The throttle valve 14a is opened. In this case, the engine 3 can be easily started.

As shown in FIG. 3, as the braking operation restricting portion, the throttle operation system swinging member 25 includes:
On the upper surface thereof, an upwardly protruding brake lever operation restricting portion 45 is provided. Corresponding to this, the brake operation system swinging member 23 has a lower surface protruding downward on the brake lever operation restricting portion 45. Contact portion 46 is provided. Therefore, when the throttle valve 14a is open enough to output to the cutting blade 2, even if the operator accidentally releases only the brake lever 10,
Since the abutment portion 46 of the braking operation system swing member 23 abuts on the brake lever operation restricting portion 45 of the throttle operation system oscillation member 25, the brake lever 10 does not move, and the brake device 16 operates. do not do.

The contact portion 46 of the braking operation system oscillating member 23 is provided with the throttle operation system oscillating member 23 when the braking operation system oscillating member 23 is in the braking release position shown in FIG. It is formed in an arc shape centered on the swing center O of the moving member 25. This is because the operation of the brake lever 10 is regulated in accordance with the entire range of the magnitude of the output to the cutting blade 2.

The brush cutter according to the present embodiment configured as described above is used as follows.

First, when starting the engine 3, the operator does not touch the brake lever 10 and keeps the brake lever 10 in the released state. In this state, since the brake device 16 is operating, the starting operation can be performed safely.

The operator moves the throttle lever 12 in a direction to increase the output as necessary, and performs a start operation of the engine 3 by the recoil starter 3a, for example. In this case, the throttle lever 12 moves by the swing angle α corresponding to the engine start auxiliary clearance S, and the throttle valve 14a is further opened slightly from the idle rotation opening degree in response to this movement. It becomes easy to start.

In a state where the brake lever 10 is released and the brake device 16 is operated, the operation of the throttle lever 12 in the direction of increasing the output is performed by the pair of output operation restricting portions 47 and 48 mutually. By the contact, it is regulated within the range corresponding to the engine start assist gap S. For this reason, even if the operator attempts to move the throttle lever 12 largely in the output increasing direction, the throttle lever 12 moves only by the gap S, and the centrifugal clutch 5 is connected to start outputting to the cutting blade 2. It will not be done.

When the engine 3 is started and is in an idling state, the operator puts the brush cutter on his shoulder with the shoulder belt, and grasps the brake lever 10 together with the left grip 9 of the operation handle 8. The braking of the cutting blade 2 by the brake device 16 is released. As a result, the braking operation system swinging member 23 swings, and the throttle lever operation regulating portion 47 constituting the pair of output operation regulating portions is retracted. Therefore, for the first time, the output of the throttle lever 12 is increased in the output increasing direction. Can be freely operated.

Then, the operator operates the throttle lever 12 in the output increasing direction to output a desired rotation to the cutting blade 2, and operates the operating rod 1 by the operating handle 8.
While oscillating left and right, the mowing operation is performed.

When the throttle lever 12 is operated in the direction of increasing the output and is output to the cutting blade 2, the braking operation of the brake device 16 by releasing only the brake lever 10 is as follows. Since the pair of braking operation restricting portions 45 and 46 are restricted by contact with each other, the brake device 16 operates even if the operator releases his hand from the brake lever 10 during the mowing operation by mistake. I will not do it.

When the output to the cutting blade 2 is stopped,
First, the throttle lever 12 is connected to the centrifugal clutch 5.
Return to the output stop position where As a result, the output to the cutting blade 2 is stopped, and the brake lever operation restricting portion 45 constituting the pair of braking operation restricting portions is provided.
Is retracted, so that the brake lever 10 can be freely operated in the braking direction. Then, when the brake lever 10 is released, the brake device 16 acts, and the rotation of the cutting blade 2 due to the inertial force can be rapidly stopped.

The throttle lever 12, like the brake lever 10, may be of a type in which the engine 3 automatically returns to idle rotation when released.

<Second Embodiment> A second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, another specific example of the operation handle mounting member 7 and the control linkage mechanism 18 is shown. In the drawings of the second embodiment, the same components as those of the first embodiment are denoted by the same reference numerals.

FIG. 7 is a perspective view of a main part of a bush cutter as an example of a power working machine according to a second embodiment of the present invention, and FIG.
FIG. 9 is an enlarged perspective view of a connecting portion between the operating rod 1 and the operating handle 8 in FIG. 7, FIG. 9 is an exploded perspective view of the connecting portion, and FIG.
FIG. 3 is a plan view of the connecting portion.

As shown in FIGS. 7 and 8, the operating handle mounting member 7 according to the second embodiment includes an operating rod side mounting member 50 and an operating handle side mounting member 51 which are vertically coupled to each other. . The operation stick side attachment member 50 and the operation handle side attachment member 51 are both
For example, using an aluminum alloy as a material, it is formed by, for example, die casting.

As shown in FIG. 9, the operation rod side mounting member 50 has a cylindrical C-shaped operation rod receiving portion 53 having a left-opening C-shaped cross section having an insertion hole 52 for the operation rod 1, and an operation rod receiving portion 53. And an operation rod receiving portion tightening bolt 54 as a fastening means for tightening the 53 to the operation rod 1. The operation rod receiving portion fastening bolt 54 is connected to the operation rod receiving portion 53.
From the upper end 53a vertically facing each other to the lower end 5
3b, and tightens the upper end 53a and the lower end 53b of the operation rod receiving portion 53 in directions approaching each other. Thereby, the operation rod side attachment member 50 is fixed to the operation rod 1.

On the other hand, the operating handle side mounting member 51
Includes an operation handle receiving portion 55 and an operation handle receiving portion tightening bolt 56 as a fastening means.
Here, as shown in FIG. 9, the operation handle receiving portion 55 is a hinged type having a rearward opening composed of an upper member 55a and a lower member 55b each having an inner peripheral surface having a semicircular cross section. The upper and lower members 55a and 55b define a horizontal linear intermediate portion 8a of the operation handle 8 (FIG. 7).
) Is clamped from above and below with the operation handle receiving portion tightening bolt 56. When the operation handle 8 is of a left-right split type, the operation handle 8 can be inserted from the side, so that the operation handle-side mounting member 51 does not need to be a hinge type. Alternatively, a cylindrical shape having a C-shaped cross section may be used. Also,
The operating rod side mounting member 50 may be of a hinge type similarly to the operation handle side mounting member 51.

The operating handle receiving portion tightening bolt 56 in the illustrated example is an operating handle mounting member assembling fastener for connecting the operating handle side mounting member 51 and the operating rod side mounting member 50 to each other up and down so as to be separable. It also serves as a bolt and has a large grip portion 56a at its upper end to facilitate its turning operation. The operating handle receiving portion tightening bolt (the operating handle mounting member assembling tightening bolt) 56 is connected to the operating handle receiving portion 5.
5 penetrate from above the ends facing each other up and down,
By being screwed into the operation rod side mounting member 50, the operation handle receiving portion 55 is connected to the operation handle 8.
And the operating handle side mounting member 51 and the operating rod side mounting member 50 are vertically coupled to each other.

In the illustrated example, the lower end portion 56b of the operation handle receiving portion tightening bolt 56 is screwed into the lower end portion 53b through the upper end portion 53a of the operation rod side mounting member 50. As a result, the operating rod side mounting member 50 is
The operation rod receiving portion 53 is also fastened.

By loosening the operation handle mounting member assembling tightening bolt 56 between the operation handle side mounting member 51 and the operation rod side mounting member 50, the vertical axis X of the bolt 56 is centered. The mutual coupling angle position can be freely changed. As shown in FIG. 10, when the brush cutter is stored or transported, the operating handle 8 is turned to be fixed along the operating rod 1 so that the contour of the entire brush cutter can be reduced. Is changed to a more compact one to improve handling.

Here, as shown in FIG. 9, the operation handle mounting member assembling tightening bolt 56 is provided between the operation handle side mounting member 51 and the operation rod side mounting member 50.
A plurality of fitting portions 57a distributed around the axis X
-58a, 57b-58b ... are provided. The plurality of fitting portions 57a-58a, 57b-58b,... Are fitted to each other at a plurality of angular positions, so that the mounting angle of the operation handle 8 with respect to the operation rod 1 can be easily set to an angular position set in advance. In addition to the change, the displacement between the operation handle side attachment member 51 and the operation rod side attachment member 50 is reliably prevented. In the illustrated example, a taper-shaped protrusion 57 having a horizontal cross section of a regular nine-pointed star is formed in the upper operation handle side attachment member 51 downward, and a tapered recess 58 adapted to the tapered protrusion 57 is formed. The plurality of fitting portions 57a-58a, 57b-58b,... Are formed by being formed on the lower operation rod side attachment member 50. In this case, since the tapered protrusion 57 and the tapered recess 58 having a horizontal cross section of a regular nine-sided star fit into each other without any gap, the operation handle side attachment member 51 and the operation rod side attachment member 50 are fitted. Can be tightly and tightly joined to each other with relatively little force.

In the illustrated example, as shown in FIG.
The maximum rotation angle of the operation handle 8 is set to 80 degrees.

Next, the control linkage mechanism 18 according to the second embodiment will be described.

As shown in FIG. 11, which is an exploded perspective view of the operation rod side mounting member 50, the control linkage mechanism 18 includes an upper case piece 60 and a lower case piece 61. Here, similarly to the first embodiment, a part of the housing 19 (the lower case piece 61 in the illustrated example) is used to facilitate the manufacture and assembly of the brush cutter.
Is integrally formed with the operation handle mounting member 7 (in the illustrated example, the operation rod side mounting member 50).

In the housing 19, an output operation interlocking member 62 interlocking with the operation of the throttle lever 12 (see FIG. 7) mounted near the right grip 11 of the operation handle 8, and the operation handle 8 The brake lever 10 attached to the vicinity of the left grip 9 (FIG. 7)
2) and a braking operation interlocking member 63 interlocking with each other are pivotally supported.

Here, the output operation interlocking member 62 and the braking operation interlocking member 63 are arranged side by side in the direction in which the operation rod 1 extends (front-back direction), and are arranged close to the operation rod 1. . With this configuration, the protrusion in the direction perpendicular to the extending direction of the operation rod 1 caused by providing the output operation interlocking member 62 and the braking operation interlocking member 63 can be suppressed as small as possible. Can be made thinner, thereby improving operability.

The output operation interlocking member 62 and the braking operation interlocking member 63 are both interlocking member support shafts 64 and 65 fixed to the lower case piece 61 by an appropriate method such as press fitting.
, Is mounted so as to be horizontally rotatable. Then, after attaching the presser springs 66 to the respective interlocking member support shafts 64 and 65, the upper case piece 60 is covered, and the upper case piece 60 and the lower case piece 61 are joined to a plurality of case piece joints. The output operation interlocking member 62 and the braking operation interlocking member 63 are supported in the housing 19 so as to be horizontally swingable by being joined to each other with the screws 67 and 67.

As shown in FIG. 11, the output operation interlocking member 62 on the front side is displaced in the vertical and horizontal directions with respect to the cylindrical portion 68 which receives the output operation interlocking member support shaft 64 so as to be relatively rotatable. And two swinging ends 69 and 70 formed integrally with the cylindrical portion 68.
One end 38a of an inner wire 38 of the first Bowden cable 37 for throttle operation constituting the throttle operation Bowden cable 13 is connected to the one end 69 of the swing, and the other end 38b of the inner wire 38 is connected.
Is connected to the throttle lever 12 as shown in FIG.

On the other hand, the other swinging other end 70 of the output operation interlocking member 62 is connected to the throttle operation second Bowden cable 13 which constitutes the throttle operation Bowden cable 13 together with the throttle operation first Bowden cable 37. One end 40a of the inner wire 40 is connected to the other end 40b of the inner wire 40.
Is connected to a throttle valve 14a of the carburetor 14, as shown in FIG. As shown in FIG. 11, the inner ends 41a, 42a of the outer tubes 41, 42 of the first Bowden cable 37 for throttle operation and the second Bowden cable 39 for throttle operation, respectively, are connected to the lower case piece 61, respectively. It is fixed by appropriate means.

When the throttle lever 12 is at the output stop position, the output operation interlocking member 62 is actuated by an urging force applied to the throttle valve 14a toward the idle rotation opening degree by the return spring (not shown).
The idling posture shown in FIG. 12 is maintained. Then, when the operator moves the throttle lever 12 in the output increasing direction, the output operation interlocking member 62 is centered on the output operation interlocking member support shaft 64 when viewed from above in conjunction with the operation. Swinging clockwise as shown in FIG. When the operator returns the throttle lever 12 to the output stop position, the output operation interlocking member 62 is actuated by the biasing force of the throttle valve 14a toward the idle rotation opening to allow the output operation interlocking member support shaft to rotate. It swings in the opposite direction (counterclockwise as viewed from above) around the center 64, and returns to the idling posture shown in FIG.

As shown in FIG. 11, the braking operation interlocking member 63 on the rear side is also connected to the braking operation interlocking member support shaft 65.
And two swinging ends 72 and 73 formed integrally with the cylinder 71 so as to be displaced vertically and horizontally with respect to each other. One end 29a of an inner wire 29 of the first Bowden cable 28 for braking operation which constitutes the Bowden cable 15 for braking operation is connected to the swinging one end 72, and the other end 29b of the inner wire 29 is connected to the other end 29b. , FIG.
As shown in FIG.

On the other hand, the other end 73 of the swing of the braking operation interlocking member 63 is connected to the second Bowden cable 30 for braking operation which constitutes the Bowden cable 15 for braking operation together with the first Bowden cable 28 for braking operation. One end 31a of the inner wire 31 is connected, and the other end 31b of the inner wire 31 is connected to the brake shoe 17 constituting the brake device 16 as in the first embodiment. (See FIG. 1). The inner ends 32a, 33a of the outer tubes 32, 33 of the first Bowden cable 28 for braking operation and the second Bowden cable 30 for braking operation are respectively connected to the lower case piece 61 as shown in FIG. It is fixed by appropriate means.

The inner wires 29 and 31 of the Bowden cable 15 for braking operation are connected to the brake shoes 1.
By the biasing force applied to the braking position 7, the blade 7 is constantly urged toward the cutting blade 2. Along with this,
The braking operation interlocking member 63 is connected to the brake lever 10.
Is released, the braking posture shown in FIG. 12 is maintained. Then, when the operator grips the brake lever 10 together with the left grip 9, the braking operation interlocking member 63 is centered on the braking operation interlocking member support shaft 65 when viewed from above, in conjunction with the operation. Swinging clockwise as shown in FIG. 13 and assume the braking release posture shown in FIG. When the operator releases the brake lever 10, the braking operation interlocking member 63 is moved in a reverse direction about the braking operation interlocking member support shaft 65 by the urging force applied to the brake shoe 17 toward the braking position. To return to the braking posture shown in FIG.

The inner wire 31-as a transmission member extending from the output operation interlocking member 62 and the braking operation interlocking member 63 in a direction intersecting when viewed from above.
In order to prevent 38, 29-40 (see FIG. 12) from contacting each other in the housing 19, FIG.
As shown in the figure, the swinging end portions 69-73, 72-70 of the output operation interlocking member 62 and the braking operation interlocking member 63.
Are vertically shifted from each other. With this configuration, the inner wires 31-38 and 29-40 do not contact each other in the housing 19, so that the driving force is transmitted to the output operation interlocking member 62 and the braking operation interlocking member 63. In addition to improving the performance, the inner wires 31, 38, 29, and 40 can be prevented from being worn.

As in the first embodiment, the output operation interlocking member 62 and the braking operation interlocking member 63 come into contact with each other at a predetermined time to regulate the movement of the other member so that the braking operation is performed. A pair of braking operation restricting portions 45 and 46 and output operation restricting portions 47 and 48 for alternately restricting the operation of the lever 10 in the braking direction or the operation of the throttle lever 12 in the output increasing direction are provided.

That is, as shown in FIG. 12, the braking operation interlocking member 63 functions as the output operation restricting portion when the braking operation interlocking member 63 is in the braking posture shown in FIG. While being located within the rotation range of the interlocking member 62, the braking operation interlocking member 63 moves to the braking release posture shown in FIG. A throttle lever operation restricting portion 47 is provided integrally with the cylindrical portion 71, and correspondingly, the output operation interlocking member 62 is provided with a contact portion 4 for contacting the throttle lever operation restricting portion 47.
8 are provided. Therefore, when the cutting blade 2 is in the braking state by the brake device 16, even if the throttle lever 12 is erroneously moved in the output increasing direction, the contact portion 48 of the output operation interlocking member 62 is Since the throttle lever operation restricting portion 47 of the braking operation interlocking member 63 comes into contact with the throttle lever operation restricting portion 47, the rotation of the engine 3 is increased, the centrifugal clutch 5 is connected, and the output to the cutting blade 2 is started. The throttle lever 12 cannot be moved.

In the second embodiment as well, as shown in FIG. 12, between the output operation restricting portions 47 and 48, the engine start assisting member is rotated by a predetermined swing angle α of the output operation interlocking member 62. A gap S is provided.

Further, as the braking operation restricting portion, FIG.
As shown in FIG. 13, when the output operation interlocking member 62 is in the rotation range of the braking operation interlocking member 62 when the output operation interlocking member 62 is in the output position shown in FIG. When the operation interlocking member 62 shifts to the idle rotation posture shown in FIG. 12, a brake lever operation restricting portion 45 that retreats to the outside of the rotation range of the braking operation interlocking member 63 is provided. The braking operation interlocking member 63 is provided with a contact portion 46 to the brake lever operation restricting portion 45. Therefore, when the throttle valve 14a is in the open state so that the centrifugal clutch 5 is connected and the output is output to the cutting blade 2, even if the operator accidentally releases only the brake lever 10, the braking operation is performed. The contact portion 46 of the interlocking member 63
Abuts against the brake lever operation restricting portion 45 of the output operation interlocking member 62, so that the brake lever 10 does not move so much that the brake device 16 operates.

The brake lever operation restricting portion 45 of the output operation interlocking member 62 controls the operation of the brake lever 10 in accordance with the entire range of the magnitude of the output to the cutting blade 2. Therefore, the output operation interlocking member 62 is formed in an arc shape centered on the swing center O.

In the second embodiment, as shown in FIG. 8, the housing 19 of the control linkage mechanism 18 is
It is arranged between the operation handle 8 and the operation rod 1. In this way, as shown in FIG. 7, the Bowden cable 13 for throttle operation and the Bowden cable 15 for braking operation extend from the housing 19 at a position close to the operation handle 8 and the operation rod 1. Therefore, for example, there is no problem that grass, branches, and the like are entangled in the vicinity of the operation handle mounting member 7 with the Bowden cable 13 for throttle operation and the Bowden cable 15 for braking operation during the mowing operation. In addition, the operability can be further improved.

In the illustrated example, the direction of change of the direction of the operation handle 8 when the brush cutter is stored or transported is set to be counterclockwise as viewed from above as shown in FIG. desirable. This is to prevent an excessive load from being applied to the throttle operation first Bowden cable 37 and the braking operation first Bowden cable 28 when the operation handle 8 is rotated. That is, in the illustrated example, the first Bowden cable 37 for throttle operation extends obliquely forward and rightward from the front right side of the housing 19 when viewed from above, and the throttle lever 12 attached to the operation handle 8 extends. And the first Bowden cable 28 for the braking operation
When viewed from above, it extends obliquely rearward left from the rear left side of the housing 19 and reaches the brake lever 10 attached to the operation handle 8. For this reason, in order to rotate the operation handle by a predetermined angle so as not to apply a load to the first Bowden cable 37 for throttle operation and the first Bowden cable 28 for braking operation, the operation handle 8 in the storage state or the like is required. Is desirably set to the counterclockwise direction.

The other configuration and operation and effect of the second embodiment are almost the same as those of the first embodiment, and therefore description thereof is omitted.

<Third Embodiment> A third embodiment of the present invention will be described with reference to FIGS. In the drawings of the third embodiment, the same components as those according to the first embodiment or the second embodiment are denoted by the same reference numerals.

The third embodiment is a modification of the second embodiment and relates to a brush cutter having a brake device 80 on the engine 3 side. That is, as shown in FIG. 14, the brake device 80 in the brush cutter of the third embodiment is used.
The brake shoe 81 is constantly urged so as to contact the clutch drum 5a constituting the centrifugal clutch 5, for example. The inner wires 29, 31 of the Bowden cable 15 for braking operation (see FIG. 15) are moved toward the centrifugal clutch 5 by an urging force applied to the brake shoe 81 by a braking spring (not shown) toward the braking position. It is constantly biased. When the brake lever 10 is released, the brake shoe 81 comes into contact with the outer peripheral surface of the clutch drum 5a, and the cutting blade 2 is in the braking state. When the brake lever 10 is grasped so as to be attached thereto, the inner wires 29, 31 of the Bowden cable 15 for braking operation are pulled toward the brake lever 10, and the brake shoe 81 is moved to the outer peripheral surface of the clutch drum 5a. The evacuation operation is performed to a braking release position away from the vehicle.

In the third embodiment, the brake device 8
Since 0 is on the engine 3 side, the braking operation is performed from the housing 19 of the control linkage mechanism 18 that houses the braking operation interlocking member 83 and the output operation interlocking member 82 side by side in the front-rear direction. Operation Bowden cable 1
5, the second Bowden cable 30 for braking operation is drawn out. Therefore, the shapes of the output operation interlocking member 82 and the braking operation interlocking member 83, the housing 19
Are different from those of the second embodiment.

As shown in FIG. 16, the output operation interlocking member 82 on the rear side has a cylindrical portion 84 for receiving the output operation interlocking member support shaft 64 so as to be relatively rotatable. It has two swing ends 85 and 86 formed integrally with the portion 84. One end 38a of the inner wire 38 of the throttle operation first Bowden cable 37 constituting the throttle operation Bowden cable 13 is connected to the swinging one end 85, and the other end 38b of the inner wire 38 is connected to the other end 38b. As shown in FIG. 14, it is connected to the throttle lever 12.

On the other hand, the other swinging end portion 86 of the output operation interlocking member 82 is connected to the throttle operation second Bowden cable 13 which constitutes the throttle operation Bowden cable 13 together with the throttle operation first Bowden cable 37. The other end 40b of the inner wire 40 is connected to the throttle valve 14a of the carburetor 14, as shown in FIG. The first Bowden cable 37 for the throttle operation
And the inner ends 41a, 42a of the outer tubes 41, 42 of the second Bowden cable 39 for throttle operation.
Are fixed to the housing 19 by appropriate means as shown in FIG.

When the throttle lever 12 is at the output stop position, the output operation interlocking member 82 is actuated by the urging force applied to the throttle valve 14a toward the idling rotation opening degree during idling shown in FIG. Holding posture. Then, when the operator moves the throttle lever 12 in the output increasing direction, the output operation interlocking member 82 is centered on the output operation interlocking member support shaft 64 when viewed from above, in conjunction with the operation. Swinging clockwise as shown in FIG. When the operator returns the throttle lever 10 to the output stop position, the output operation interlocking member 82 is actuated by the biasing force of the throttle valve 14a toward the idle rotation opening to allow the output operation interlocking member support shaft to rotate. 18 in the opposite direction (counterclockwise as viewed from above) about the center 64.
To the posture during idling shown in FIG.

As shown in FIG. 17, the brake operation interlocking member 83 on the front side has a cylindrical portion 87 which receives the brake operation interlocking member support shaft 65 so as to be relatively rotatable. And two swinging ends 88 and 89 integrally formed with the cylindrical portion 87 so as to be shifted. One end 29a of the inner wire 29 of the first Bowden cable 28 for braking operation, which constitutes the Bowden cable 15 for braking operation, is connected to the one end 88 of the swing, and the other end 29b of the inner wire 29 is connected. Is connected to the brake lever 10 as shown in FIG.

On the other hand, the other end 89 of the swing of the braking operation interlocking member 83 is connected to the second Bowden cable 30 for braking operation constituting the Bowden cable 15 for braking together with the first Bowden cable 28 for braking operation. One end 31a of the inner wire 31 is connected, and the other end 31b of the inner wire 31 is connected to the brake shoe 81 (see FIG. 14). The inner ends 32a, 33a of the outer tubes 32, 33 of the first Bowden cable 28 for braking operation and the second Bowden cable 30 for braking operation, as shown in FIG. It is fixed with.

The inner wires 29 and 31 of the Bowden cable 15 for braking operation are connected to the brake shoes 8.
Due to the urging force applied to the braking position 1, it is normally urged toward the clutch drum 5 a. Accordingly, when the brake lever 10 is released, the braking operation interlocking member 83 maintains the braking posture shown in FIG. Then, when the operator grips the brake lever 10 together with the left grip 9, the braking operation interlocking member 83 is interlocked with the operation.
Swings counterclockwise about the braking operation interlocking member support shaft 65 as viewed from above, and assumes the braking release posture shown in FIG. When the operator releases the brake lever 10, the braking operation interlocking member 83 is moved in the reverse direction about the braking operation interlocking member support shaft 65 by the urging force applied to the brake shoe 81 toward the braking position. To return to the braking posture shown in FIG.

Incidentally, similarly to the second embodiment,
The output operation interlocking member 82 and the braking operation interlocking member 83
In order to prevent the inner wires 31 and 38 (see FIG. 18) extending in a direction intersecting when viewed from above from coming into contact with each other in the housing 19, FIG.
As shown in FIG. 6 and FIG.
2 and the swinging ends 85, 8 of the braking operation interlocking member 83
9 are shifted vertically from each other.

As in the second embodiment, the output operation interlocking member 82 and the braking operation interlocking member 83 come into contact with each other at a predetermined time to regulate the movement of the other member so that the braking operation is performed. A pair of braking operation restricting portions 45 and 46 and output operation restricting portions 47 and 48 for alternately restricting the operation of the lever 10 in the braking direction or the operation of the throttle lever 12 in the output increasing direction are provided.

That is, as the output operation restricting section, FIG.
As shown in FIG. 8 and FIG.
3, when the braking operation interlocking member 83 is in the braking position shown in FIG. 18, it is located within the rotation range of the output operation interlocking member 82, and the braking operation interlocking member 83 swings. The throttle lever operation restricting portion 47 is retracted out of the rotation range of the output operation interlocking member 82 by shifting to the braking release posture shown in FIG.
7, the output operation interlocking member 82 is provided integrally with the throttle lever operation restricting portion 4.
7 is provided. For this reason, when the cutting blade 2 is in the braking state by the brake device 80, even if the throttle lever 12 is erroneously moved in the output increasing direction, the contact portion 48 of the output operation interlocking member 82 is Since the throttle lever operation restricting portion 47 of the operation interlocking member 83 comes into contact with the throttle lever operation restricting portion 47, the rotation speed of the engine 3 becomes equal to or higher than a predetermined value, and the centrifugal clutch 5 is connected to start outputting to the cutting blade 2. Means that the throttle lever 12 cannot be moved.

In the third embodiment as well, as shown in FIG. 18, the engine start assist is provided between the output operation restricting portions 47 and 48 by a predetermined swing angle α of the output operation interlocking member 82. A gap S is provided.

Further, as the braking operation restricting section, FIG.
19, as shown in FIG.
When the output operation interlocking member 82 is in the rotation range of the braking operation interlocking member 83 when the output operation interlocking member 82 is in the output position shown in FIG. The brake lever interlocking member 83 is provided with a brake lever operation restricting portion 45 that retreats to the outside of the rotation range of the braking operation interlocking member 83 by shifting to the idle rotation posture shown in FIG. Is provided with a contact portion 46 to the brake lever operation restricting portion 45. Therefore, when the throttle valve 14a is in the open state so that the centrifugal clutch 5 is connected and the output is output to the cutting blade 2, even if the operator accidentally releases only the brake lever 10, the braking operation is performed. Since the contact portion 46 of the interlocking member 83 contacts the brake lever operation restricting portion 45 of the output operation interlocking member 82, the brake lever 10 does not move to the extent that the brake device 80 operates.

In the third embodiment, contrary to the second embodiment (FIG. 10), as shown in FIG.
An operating handle mounting member assembling tightening bolt 56 constituting the operating handle mounting member 7 is located on the front side of the operating handle 8. Then, the first Bowden cable 28 for braking operation which extends obliquely leftward from the front left side of the housing 19 to reach the brake lever 10 when viewed from above, and the rear right side of the housing 19 when viewed from above. The throttle lever 1 extends obliquely rearward and
The rotation direction of the operation handle 8 at the time of storage, transportation, and the like is different from that of the second embodiment so that an excessive load is not applied to the throttle operation first Bowden cable 37 reaching 2. Conversely, when viewed from above, it is clockwise.

[0108] Other configurations, functions and effects of the third embodiment are the same as those of the first or second embodiment, and therefore description thereof is omitted.

<Fourth Embodiment> A fourth embodiment of the present invention will be described with reference to FIGS. In the drawings of the fourth embodiment, the same components as those of the first embodiment are denoted by the same reference numerals.

The brush cutter according to the fourth embodiment does not include an operation handle 8 different from the operation rod 1 as in the first to third embodiments, and as shown in FIG.
The front and rear grip portions 100 and 101 are fixedly provided on the operation rod 1 extending straight in the front and rear direction.
A brake lever device 102 for performing a braking operation on the cutting blade 2 is provided near the front grip portion 100 which is normally gripped by the left hand, at a position where the brake release operation can be performed with the fingers while holding the front grip portion 100. Installed. On the other hand, a throttle lever device 103 is attached in the vicinity of the rear grip portion 101 which is normally gripped by the right hand, at a position where the engine 3 can be accelerated / decelerated with fingers while holding the rear grip portion 101. .

First, the throttle lever device 103 will be described. As shown in FIG. 20, a throttle lever 104 of the throttle lever device 103 is operatively connected to a throttle valve 14a of a carburetor 14, which is an output control member of the engine 3, via a Bowden cable 105 for throttle operation. ing. Here, the throttle valve 14a is constantly biased in a direction automatically returning to the idle rotation opening, and the inner wire 106 (see FIG. 22) of the throttle operation Bowden cable 105 connected thereto is connected. When the throttle lever device 103 is pulled from a non-operation state by a predetermined length or more by a grip operation, the throttle valve 14a starts to open from the idle rotation opening in the direction of increasing the speed of the engine 3 (output increase). I have.

As shown in FIG. 21, the throttle lever device 103 includes a throttle lever housing 107 which supports the throttle lever 104 so as to swing. The throttle lever housing 107 is shown in FIG.
As shown in FIG. 2, a left case piece 109 and a right case piece 110 which are connected to each other by a plurality of bolts 108 so as to sandwich the operation rod 1 from the left and right are provided in front of the rear grip portion 101. It is located adjacent to it. Each of the left case piece 109 and the right case piece 110 has a substantially horizontal, square dish-like appearance, and is made of, for example, a synthetic resin or the like to reduce the weight of the apparatus.

The throttle lever 104 has a substantially L-shape when viewed from the side, and has a tubular portion 111 extending horizontally in the upper end thereof. The cylinder portion 111 includes the throttle lever housing assembly bolt 108.
Are inserted as a throttle lever pivot shaft so as to be relatively rotatable.

Operation section 11 of the throttle lever 104
2, as shown in FIG. 21, the rear grip portion 1
01 extends obliquely downward. The throttle lever 104 is moved so that the operation unit 112 is held at an idle opening position in FIG. 21 farthest downward from the rear grip unit 101.
a is always urged by a return spring (not shown).
The operation unit 11 of the throttle lever 104
When the grip 2 is gripped together with the rear grip portion 101, the inner wire 106 of the Bowden cable 105 for throttle operation is pulled forward of the operation rod 1, and the throttle valve 14a opens from the idle rotation opening. Conversely, when the operating portion 112 of the throttle lever 104 is released, the inner wire 106 of the Bowden cable 105 for throttle operation is caused by the urging force of the throttle valve 14a in the opening direction of the idle rotation, thereby causing the operating rod to move. 1 and the throttle valve 14a is automatically returned to the idle rotation opening.

Here, the output operation system from the throttle lever 104 to the throttle valve 14a includes:
An output operation interlocking member 113 interlocked with the operation of the throttle lever 104 is provided. The output operation interlocking member 1
13 is a support shaft 1 extending in the vertical direction as shown in FIG.
The support shaft 114 is supported by the upper and lower ends of the support shaft 114 as a press fit inside the right case piece 110.

An end fitting 116 attached to the front end of the inner wire 106 of the Bowden cable 105 for throttle operation is fitted into one end (oscillation left end) 115 of the output operation interlocking member 113. Locked. Although not shown, the outer tube 11 of the throttle operation Bowden cable 105 is not shown.
The front end 117a of the shutter 7 is fixed to the throttle lever housing 107 by an appropriate method.

On the other hand, as shown in FIG. 22, an end fitting 120 attached to the front end of the lever side wire 119 is fitted into the other end (the right end of the swing) 118 of the output operation interlocking member 113. And locked. An end fitting 121 attached to the rear end of the lever-side wire 119 is fitted and locked in the swinging bent portion 122 of the throttle lever 104.

In the illustrated example, as shown in FIGS. 26 and 27, the left and right swing arms 113a and 113b of the output operation interlocking member 113 are made to have different lengths, and the narrow width operation of the throttle lever 104 is performed. Thus, the throttle valve 14a can be enlarged and controlled in a large range, and the throttle lever device 103 is made compact.

The throttle lever housing 1
An engine stop switch 200 is provided on the upper left side of the engine 07 so that it can be operated with the thumb of the hand gripping the rear grip 101.

Next, the brake lever device 102 will be described.

As shown in FIG. 20, the brake lever device 102 is connected to a brake device 16 via a brake operation Bowden cable 123 as a brake urging force transmitting member.
Operatively connected to The structure of the brake device 16 is the same as that of the first embodiment.

The above-mentioned Bowden cable 123 for braking operation
As in the case of the first embodiment, is arranged so as to be closely attached to the operation rod 1 so as not to hinder the mowing operation performed while swinging the operation rod 1 left and right. .

As shown in the overall perspective view of FIG. 23, the brake lever device 102 includes a brake lever housing 125 that supports a brake lever 124 so as to swing. The brake lever housing 125 is composed of a left case piece 126 and a right case piece 127 which are connected to each other so as to sandwich the operation rod 1 from the left and right, and are located in front of and adjacent to the front grip portion 100. I have. As shown in the exploded perspective view of FIG. 24, the left case piece 126 and the right case piece 127 each have a substantially square dish-like appearance. It is made lightweight with resin or the like.

As shown in FIG. 23, the operating portion 128 of the brake lever 124 is moved from the lower position of the rear portion of the brake lever housing 125 to the front grip portion 100.
Extends downward and obliquely downward. The brake lever 124 is constantly urged so that the operation unit 128 is held at the braking position shown in FIG. 23 farthest downward from the front grip unit 100.

In FIG. 24, the brake lever 12
4 includes, in addition to the operating portion 128, a cylindrical portion 130 for receiving the pivot shaft 129 so as to be relatively rotatable;
And a vertical arm portion 131 extending downward from the portion and continuing to the operation portion 128. That is, the brake lever 124 has a substantially L-shape when viewed from the side, and includes the cylindrical portion 130 at an upper end thereof.
Here, the vertical arm portion 131 is curved in the left-right direction so as to avoid interference with the outer peripheral shape of the operation rod 1, thereby making the brake lever device 102 compact.
The pivot shaft 129 extending horizontally in the left-right direction of the brake lever 124 also serves as a bolt for connecting the left and right case pieces 126, 127 to each other, and is inserted through an upper portion of the left and right case pieces 126, 127. .

The operation section 1 of the brake lever 124
An end fitting 134 fixed to the rear end portion of the inner wire 133 of the braking operation Bowden cable 123 is fitted and locked in the bent portion 132 between the arm 28 and the vertical arm portion 131. Bowden cable for braking operation 1
23 is the outer tube 1 as shown in FIG.
The rear end 135a of the 35 is fixed to the brake lever housing 125, extended forward along the operation rod 1, and operatively connected to the brake shoe 17 (see FIG. 20).

In FIG. 20, the output operation system from the throttle lever device 103 to the throttle valve 14a and the braking operation system from the brake lever device 102 to the brake shoe 17 The control linkage mechanism 18 described is interposed.

As shown in FIG. 22, the control linkage mechanism 18 includes the output operation interlocking member 113 interlocking with the swing operation of the throttle lever 104, and the output operation interlocking member 113 in front of and close to the output operation interlocking member 113. A brake operation interlocking member 136 that is arranged and interlocks with the swing operation of the brake lever 124. In the illustrated example, the output operation interlocking member 113 and the braking operation interlocking member 136 are used to minimize the vertical thickness of the control linkage mechanism 18 and the lateral protrusion of the operation rod 1 due to the control linkage mechanism 18. Are arranged side by side in the front-rear direction of the operation rod 1 so as to rotate in the same plane.

When the opening of the throttle valve 14a is the idling rotation opening, the output operation interlocking member 113 maintains a predetermined idling posture shown in FIG. When the operator turns the throttle lever 104 in the output increasing direction, the output operation interlocking member 113 swings clockwise as viewed from above in conjunction with the operation, for example, The output posture is as shown in FIG.

On the other hand, as shown in FIG. 22, the braking operation interlocking member 136 is supported by a vertically extending support shaft 137 in a braking operation interlocking member housing 138 so as to be horizontally rotatable. The braking operation interlocking member housing 138 is formed small and integrally with the front part of the throttle lever housing 107, and is located below the operation rod 1 (see FIG. 21). Here, as shown in FIG. 22, the housing 138 for accommodating the braking operation interlocking member is formed of an upper case piece 139 and a lower case piece 140 which are compatible with each other.
9 is formed integrally with the left case piece 109 of the throttle lever housing 107, and the lower case piece 140 is formed integrally with the right case piece 110 of the throttle lever housing 107.

As shown in FIG. 25, the braking operation interlocking member 136 is operatively connected to the brake lever 124 via a Bowden cable 141 for driving a braking operation interlocking member which can be pushed and pulled.

Here, as shown in FIG. 24, an end fitting 143 fixed to a front end of an inner wire 142 of the Bowden cable 141 for driving the braking operation interlocking member is fitted to the bent portion 132 of the brake lever 124. Then, the Bowden cable 141 for driving the braking operation interlocking member is extended rearward along the operation rod 1 so as to be fixed to the rear end of the inner wire 142 as shown in FIG. The metal fitting 144 is fitted and locked to a swinging one end (swinging right end) 145 of the braking operation interlocking member 136. Then, the front end 146a and the rear end 146b of the outer tube 146 of the brake operation interlocking member driving Bowden cable 141 are fastened to the brake lever housing 125 and the brake operation interlocking member housing 138, respectively. (See FIGS. 25 and 22).

As a result, as shown by an imaginary line in FIG. 25, when the operating portion 128 of the brake lever 124 is released (when the brake device 16 is in the operating state), the braking operation is performed. The inner wire 142 of the Bowden cable 141 for driving the interlocking member is pulled forward by a predetermined amount, and in response to this, the braking operation interlocking member 136 is always kept in the predetermined braking posture shown by the solid line in FIG. Have been.

When the operation portion 128 of the brake lever 124 is squeezed upward toward the front grip portion 100 as shown by a solid line in FIG. 25, the bending portion 132 of the brake lever 124 is moved rearward. , The inner wire 133 of the braking operation Bowden cable 123 is pulled rearward of the operation rod 1 to release the brake device 16, and the braking operation interlocking member driving Bowden cable 141 is released. The inner wire 142 is pushed back inside the outer tube 146. As a result, the braking operation interlocking member 136 rotates clockwise as viewed from above by a predetermined angle, and shifts to a predetermined braking release posture shown in FIG.

As shown in FIG. 23, the Bowden cable 141 for driving the braking operation interlocking member is disposed so as to penetrate through the inside of the front grip portion 100 so as not to hinder the gripping operation.

The output operation interlocking member 113 and the braking operation interlocking member 136 come into contact with each other at a predetermined time to regulate the movement of the other member so that the operation of the brake lever 124 in the braking direction can be performed. Alternately restricting the operation of the throttle lever 104 in the output increasing direction,
The braking operation restricting units 45 and 46 and the output operation restricting unit 47,
48 are provided in pairs.

That is, as the output operation restricting section, FIG.
As shown in FIG. 6, the other end (oscillation left end) 147 of the braking operation interlocking member 136 is provided with the output operation when the braking operation interlocking member 136 is in the braking posture shown in FIG. A throttle that is located within the swing range of the interlocking member 113 and retracts out of the swing range of the output operation interlocking member 113 when the braking operation interlocking member 136 shifts to the braking release posture shown in FIG. A lever operation restricting portion 47 is provided, and a contact portion 48 to the throttle lever operation restricting portion 47 is provided on the left swing arm 113a of the output operation interlocking member 113 in correspondence thereto. Therefore, when the cutting blade 2 is in the braking state by the brake device 16, even if the throttle lever 104 is erroneously moved in the output increasing direction,
Since the contact portion 48 of the output operation interlocking member 113 contacts the throttle lever operation restricting portion 47 of the braking operation interlocking member 136, the rotation speed of the engine 3 becomes equal to or higher than a predetermined value, and the centrifugal clutch 5 is connected. The throttle lever 104 cannot be moved to such an extent that the output to the cutting blade 2 is started.

In the fourth embodiment, similarly to the above embodiments, as shown in FIG. 26, the output operation interlocking member 113 is provided between the output operation restricting portions 47 and 48.
The engine start assist gap S is provided by the swing angle α.

Further, as the braking operation restricting portion, FIG.
As shown in FIG. 27, the output operation interlocking member 113 is located within the swing range of the braking operation interlocking member 136 when the output operation interlocking member 113 is in the output position shown in FIG. The operation linking member 113 is shown in FIG.
A brake lever operation restricting portion 45 is provided which retreats to the outside of the swing range of the braking operation interlocking member 136 by shifting to the idle rotation posture shown in FIG. Is provided with a contact portion 46 to the brake lever operation restricting portion 45. Therefore, when the throttle valve 14a is in an open state so that the centrifugal clutch 5 is connected and the output is output to the cutting blade 2, even if the operator accidentally releases only the brake lever 124, the braking operation is performed. Interlocking member 136
The abutment portion 46 abuts on the brake lever operation restricting portion 45 of the output operation interlocking member 113, so that the brake lever 124 does not move as far as the brake device 16 operates.

In the fourth embodiment, as shown in FIG. 24, the Bowden cable 141 for driving the braking operation interlocking member and the Bowden cable 123 for braking are connected to each other.
Both are connected to the brake lever 124, and the two Bowden cables 123, 141 are pulled out from the brake lever 124 in the forward and backward directions along the extending direction of the operation rod 1, so that the brake lever device is provided. 102 can be formed in a compact shape with the protrusion of the operation stick 1 in the left and right outer directions as small as possible.

The other constructions and functions and effects of the fourth embodiment are substantially the same as those of the first embodiment, and therefore description thereof is omitted.

[Brief description of the drawings]

FIG. 1 is an overall schematic perspective view showing a brush cutter as an example of a power working machine according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the operation handle mounting member as viewed from the direction of arrow A in FIG.

FIG. 3 is an exploded perspective view of a control linkage mechanism between a throttle operation system and a braking operation system.

FIG. 4 is an explanatory diagram showing an operation state at the time of braking of the control linkage mechanism according to the first embodiment.

FIG. 5 is an explanatory diagram showing an operation state at the time of output of the control linkage mechanism according to the first embodiment.

FIG. 6 is an explanatory diagram corresponding to FIG. 5;

FIG. 7 is a perspective view of a main part of a bush cutter as an example of a power working machine according to a second embodiment of the present invention.

FIG. 8 is an enlarged perspective view of a connecting portion between the operation rod and the operation handle in FIG. 7;

9 is an exploded perspective view of a connecting portion between the operation rod and the operation handle in FIG. 7;

FIG. 10 is a plan view of a connecting portion between the operation rod and the operation handle in FIG. 7;

FIG. 11 is an exploded perspective view of a control linkage mechanism according to a second embodiment.

FIG. 12 is an explanatory diagram showing an operation state at the time of braking of a control linkage mechanism according to a second embodiment.

FIG. 13 is an explanatory diagram showing an operation state at the time of output of the control linkage mechanism according to the second embodiment.

FIG. 14 is a perspective view of a main part of a bush cutter as an example of a power working machine according to a third embodiment of the present invention.

FIG. 15 is a plan view of a connecting portion between the operation rod and the operation handle in FIG. 14;

FIG. 16 is an enlarged perspective view of an output operation interlocking member according to a third embodiment.

FIG. 17 is an enlarged perspective view of a braking operation interlocking member according to a third embodiment.

FIG. 18 is a plan view showing an operation state at the time of braking of a control linkage mechanism according to a third embodiment.

FIG. 19 is a plan view showing an operation state at the time of output of the control linkage mechanism according to the third embodiment.

FIG. 20 is an overall schematic perspective view showing a brush cutter as an example of a power working machine according to a fourth embodiment of the present invention.

21 is an overall perspective view of the throttle lever device in FIG.

FIG. 22 is an exploded perspective view of the throttle lever device.

FIG. 23 is an overall perspective view of the brake lever device in FIG. 20;

FIG. 24 is an exploded perspective view of the brake lever device.

FIG. 25 is a vertical sectional side view of the brake lever device.

FIG. 26 is a plan view showing an operation state at the time of braking of the control linkage mechanism according to the fourth embodiment.

FIG. 27 is a plan view showing an operation state of the control linkage mechanism according to the fourth embodiment at the time of output.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 operating rod 2 cutting blade (power working member) 3 internal combustion engine (power source) 7 operating handle mounting member 7 a part of operating handle mounting member (other components of working machine) 8 operating handle 10 brake lever (braking operating member) 10-15-16 Brake operation system 10-15-81 Brake operation system 12 Throttle lever (output operation member) 12-13-14 Output operation system 14 Vaporizer 14a Throttle valve (output control member) 16 Braking device 17 Brake shoe (Brake action member) 19 Housing 20 First case piece 21 Second case piece 23 Brake operation system swing member 25 Throttle operation system swing member (output operation interlocking member) 38-31 Transmission member 40-29 Transmission member 45, 46 A pair of braking operation restricting portions 47, 48 A pair of output operation restricting portions 50 Operating rod side mounting member 51 Operating hand Side mounting member 56 Operation handle mounting member assembling tightening bolt (tightening means) 57a-58a, 57b-58b Plural fitting parts 60, 61 Case piece 62 Output operation interlocking member 63 Brake operation interlocking member 80 Brake device 81 Brake shoe (Brake action member) 82 Output operation interlocking member 83 Braking operation interlocking member 104 Throttle lever (Output operation member) 104-105-14 Output operation system 113 Output operation interlocking member 124 Brake lever (Brake operation member) 124-123-16 Braking Operation system 123 Bowden cable for braking operation 136 Braking operation interlocking member 138-107 Housing S Engine start auxiliary gap O Swing center of output operation interlocking member

Claims (17)

[Claims] An output operation system (12-13-14, 104) for controlling an output of a power source (3) to a power working member (2).
-105-14) and a braking operation system (10-15-16, 10-1) for stopping the operation of the power working member (2).
5-81, 124-123-16), when the power working member (2) is in a braking state, the power working member (2) is brought into contact with the power operating member (2, 104) by the output operating member (12, 104). Output operation restricting portions (47, 48) for restricting the output control operation to the power working member (2) are provided in pairs, and when the power source (3) is output to the power working member (2), the power operating member (2) comes into contact with each other to brake. A power working machine comprising a pair of braking operation restricting portions (45, 46) for restricting a braking operation of the power working member (2) by the operating members (10, 124). 2. An output operation interlocking member (25, 62, 82, 1) interlocked with the output operation member (12, 104).
13), the output control member (14a) of the power source (3) is operatively connected to the power source (3), and the braking operation member (10, 1) is connected.
24) and the braking operation interlocking members (23, 6) interlocked with each other.
3, 83, 136) and a braking action member (17, 81) operatively connected to the output operation interlocking member (25, 62, 8).
, 113) and the braking operation interlocking member (23, 63, 8).
3 and 136) respectively.
The power working machine according to claim 1, wherein the power working machine (48) and the braking operation restricting portions (45, 46) are provided in pairs. 3. The power source (3) is attached to an output operation interlocking member (113) interlocked with the output operation member (104).
And a braking operation member (17) and a braking operation interlocking member (136) are connected to the braking operation member (124) by separate paths. The member (104) and the braking operation interlocking member (136) are provided with the output operation restricting portions (47, 48) and the braking operation restricting portions (45, 46) in pairs, respectively. The described power working machine. 4. An output operating member (12, 104) for controlling an output of a power source (3) to a power working member (2).
An output operation interlocking member (25, 62, 82, 113) interlocked with the output operation member (12, 104); and a brake device (16, 80) for operating the power working member (2). A power working machine comprising: a braking operation member (10, 124); and a braking operation interlocking member (23, 63, 83, 136) interlocking with the braking operation member (10, 124). Output operation interlocking member (25, 6
2, 82, 113) and the braking operation interlocking member (23, 6).
3, 83, 136) between the power working member (2)
Output control members (47, 4) that abut against each other to control output control operations on the power working member (2) by the output operation members (12, 104) when the brakes are in a braking state.
8) are provided in pairs, and in the output state from the power source (3) to the power working member (2),
A power working machine comprising a pair of braking operation restricting portions (45, 46) that abut against each other to restrict the braking operation of the power working member (2) by the braking operation members (10, 124). 5. An internal combustion engine (3) as said power source, and said pair of output operation restricting portions (47, 4).
During the period 8), when the power working member (2) is in the braking state, the power working member (2) is not operated, but the carburetor (1) is of an extent that the engine (3) can be started smoothly.
4) The engine start assist gap (S) that allows only a predetermined amount of movement of the output operation members (12, 104) so that the throttle valve (14a) of (4) can be opened.
The power working machine according to any one of claims 1 to 4, further comprising: 6. The output operation interlocking member (62, 82, 1).
13) and the braking operation interlocking member (63, 83, 136)
And an operating rod (1) for supporting the power working member (2).
6. A power working machine according to claim 2, wherein the power working machine is arranged in the direction in which the control rod extends, and is disposed close to the operation rod (1). 7. The output operation interlocking member (25, 62, 8)
, 113) and the braking operation interlocking member (23, 63, 8).
3, 136) is made to be swingable.
A power working machine according to any one of claims 1 to 6. 8. The braking operation restricting portion has an arc-shaped portion (46) centered on a swing center (O) of the output operation interlocking member (25, 82, 113). 8. The power working machine according to 7. 9. The output operation interlocking member (25, 62, 8)
, 113) and the braking operation interlocking member (23, 63, 8).
3,136) and a housing (19,138-
The power working machine according to any one of claims 1 to 8, further comprising (107). 10. The output operation interlocking member (62, 82).
The transmission members (40-29, 38-31) respectively connected to the brake operation interlocking members (63, 83) do not contact each other in the housing (19). , 38-31) and the braking operation interlocking members (63, 82).
The power working machine according to claim 9, wherein the connection positions to the (83) are shifted from each other. 11. A first case piece (20) for supporting said housing (19) on said braking operation interlocking member (23).
The power working machine according to claim 9, wherein the power working machine is formed by a combination of a second case piece (21) supporting the output operation interlocking member (25). 12. The power working machine according to claim 11, wherein at least one of the case pieces (20) is formed integrally with another component (7a) of the working machine. 13. The housing (19) is formed by combining a plurality of case pieces (20-21, 60-61), and at least one of the plurality of case pieces (20, 61) is formed. And the other part (7a, 50) of the working machine is integrally molded.
The power working machine according to 0. 14. An operation rod (1) for supporting the power working member (2), and the output operation member (12) and the braking operation member (10) connected to the operation rod (1). Between the output operation interlocking member (25, 62, 82) and the braking operation interlocking member (2).
The power working machine according to any one of claims 1 to 8, wherein (3, 63, 83) is disposed. 15. An operating rod (1) for supporting the power working member (2), and the output operating member (12) and the braking operating member (10) connected to the operating rod (1). The power working machine according to any one of claims 9 to 13, wherein the housing (19) is disposed between the operating handle (8) and the operating handle (8). 16. An operation handle mounting member (7) for mounting the operation handle (8) to the operation rod (1).
Operating rod side mounting member (50) for connecting
The operation handle-side mounting member (50) and the operation handle-side mounting member (51) are formed from an operating handle-side mounting member (51), and the operating rod-side mounting member (51) is made to be capable of changing a coupling angle position with each other. The described power working machine. 17. The operation rod-side mounting member (50) and the operation handle-side mounting member (50) are fitted to each other between the operation rod-side mounting member (50) and the operation handle-side mounting member (51). 51) and a plurality of fitting portions (57a-58a,
57b-58b), and the operation rod side mounting member (5
The power working machine according to claim 16, wherein the operating handle (0) and the operating handle-side mounting member (51) are detachably connected to each other by a fastening means (56).