JP2017006076A - Portable working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust the angle of a working member efficiently with good workability.SOLUTION: When a lock lever 32 is in a first state (the state represented in Fig. 4(a), a protruding portion 32C is positioned lower than a lower portion of each pulley groove 34B. As illustrated in Fig. 4(b), when an operator operates the lock lever 32 to push it downward to make its state from the first state to a second state, the lock lever 32 rotates in the clockwise direction in the drawing. As a result, a protruding portion 32C moves upward and engages with one of the pulley grooves 34B. As illustrated in Fig. 4(c), under this state, the operator pulls a throttle lever 31 to drive a blade 44.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a configuration of a portable working machine that includes a working member that is driven by a power source and whose direction can be adjusted.

  In a hedge trimmer used for cutting a plant or the like with a blade, a long blade guide is fixed to a main body on which an engine or the like as a power source is mounted, and reciprocates along the longitudinal direction of the blade guide ( A cutting blade (working member) is mounted on the blade guide. The blade edge of the blade protrudes on both sides in the direction perpendicular to the longitudinal direction of the blade guide, and the operator grasps the handle attached to the main body and makes the blade edge contact the plant or the like to be cut. Cutting work can be done.

  As one kind of hedge trimmer, a pole hedge trimmer as described in Patent Document 1 is known. In the pole hedge trimmer, a long and narrow operating rod is fixed to the main body, and a gear case having a blade guide fixed to the tip of the operating rod is provided. The rotational motion of the engine is transmitted to the gear case on the tip side via a drive shaft provided coaxially in the operation rod, and this rotational motion is converted into the reciprocating motion of the blade in the gear case. In this configuration, the distance from the main body side that the operator directly operates to the blade that actually performs the cutting operation is increased, and it is possible to perform a cutting operation at a location away from the operator using this. On the other hand, since the total length of such a pole hedge trimmer becomes very long, it is preferable that the pole hedge trimmer is folded in the longitudinal direction during transportation and storage.

  For this reason, in the technique described in Patent Document 1, the gear case is divided into a first gear case and a second gear case, the first gear case is fixed to the operating rod, and is attached to the first gear case so as to be rotatable. The blade guide is fixed to the two gear case. The second gear case and the elongated blade guide fixed to the second gear case can be rotated (folded) with respect to the operating rod. For this reason, the lever (third grip) operated to perform the folding operation is fixed to the second gear case, and the operator can easily perform the folding operation by operating the lever. Here, in order to improve the workability and efficiency of the work, the engine is automatically stopped when the work is performed, or the engine cannot be started in the folded state.

  Further, in a normal hedge trimmer, the operator can change the direction of the blade (cutting direction) by changing the direction of the entire hedge trimmer and perform the cutting operation. On the other hand, in a pole hedge trimmer using a long operating rod, such a work is difficult because the distance between the main body and the blade that the operator holds is long. For this reason, it is preferable that the set angle with respect to the operating rod such as the blade guide as described above can be adjusted not only for transporting and storing the pole hedge trimmer but also for cutting work. For this reason, in the technique described in Patent Document 1, the blade can be driven after the set angle is adjusted and fixed to perform a cutting operation. In this case, however, the engine is automatically stopped when the set angle is changed, and after the angle is adjusted and fixed to a desired set angle, the engine can be started again. A plurality of values are set as the set angle, and this fixing is performed by locking the terminal in one of a plurality of locking holes provided corresponding to the set angle. By adopting such a configuration, it is possible to suppress, for example, a sudden change in the direction of the blade while the blade is driven, and the pole hedge trimmer can be used with good workability.

JP 2010-233553 A

  In the technique described in Patent Document 1, in order to perform the above angle adjustment in the middle of the work, the engine is once stopped, and then the pole hedge trimmer is placed on the ground or the like to adjust the angle. After fixing, it is necessary to start the engine again. For this reason, many operations are required to perform the work after adjusting the angle, and it is difficult to perform the work efficiently.

  That is, a portable working machine that can efficiently adjust the angle of the working member with good workability has been desired.

  The present invention has been made in view of such problems, and an object thereof is to provide an invention that solves the above problems.

In order to solve the above problems, the present invention has the following configurations.
A portable work machine according to the present invention is a portable work machine comprising: an operating rod extending in the front-rear direction; and a working member provided on a front end side of the operating rod and driven by a power source. A drive state control means that is operated to control the drive state of the member, an angle adjustment means that is operated to change a set angle of the work member with respect to the operation rod, and a restriction that the work member is not in the drive state And a first state that allows the setting angle to be changed by the angle adjusting means, and a first state that allows the working member to be in a driving state and restricts the setting angle from being changed by the angle adjusting means. 2 states.
The portable work machine of the present invention includes a state switching unit that is set by switching between the first state and the second state.
The portable work machine according to the present invention is characterized in that the state switching means is provided on the rear end side of the operating rod.
In the portable work machine of the present invention, the state switching means can switch between the first state and the second state at a plurality of the set angles set by the angle adjusting means. It is characterized by.
In the portable work machine of the present invention, the state switching means limits the drive state control means to a state in which the work member is not driven in the first state, and the drive state control means in the second state The operation of driving the working member is allowed.
In the portable work machine according to the present invention, the power source is an engine provided on a rear end side of the operation rod, and the work member is driven by a crankshaft of the engine via a centrifugal clutch. To do.
In the portable work machine of the present invention, the drive state control means is a throttle lever that controls the rotational speed of the crankshaft and is mounted on the rear end side of the operating rod.
In the portable work machine of the present invention, the working member is attached to a gear case attached to a front end side of the operating rod, and an angle of the gear case with respect to the operating rod is adjusted by the angle adjusting means. To do.
In the portable work machine according to the present invention, the angle adjusting means is an angle adjusting lever mounted on a rear end side of the operating rod, and the state switching means is the angle adjusting lever in the first state. And the operation of the angle adjusting lever is limited in the second state.
In the portable working machine of the present invention, the working member is a blade that performs a cutting work by reciprocating.

  Since this invention is comprised as mentioned above, the angle adjustment of a working member can be performed efficiently with sufficient workability | operativity.

It is a side view which shows the structure of the pole hedge trimmer used as embodiment of this invention. It is the top view (a) and side view (b) which expand and show the structure before and behind the operating rod in the pole hedge trimmer which becomes embodiment of this invention. It is a side view which shows the state corresponding to two types of setting angles in the pole hedge trimmer which becomes embodiment of this invention. FIG. 5 is a perspective view seen from the side of the operation unit in a state where the lock lever is not operated (a), a state where the lock lever is operated and the throttle lever is not operated (b), and a state where the lock lever and the throttle lever are operated (c). is there. It is the perspective view which looked at the 1st pulley etc. in the state where the lock lever was operated from the upper part.

  A configuration of a portable work machine that is an engine work machine according to an embodiment of the present invention will be described. FIG. 1 is a side view showing the overall configuration of a pole hedge trimmer 1 that is a portable work machine. In this pole hedge trimmer 1, an elongated operating rod 20 that protrudes greatly forward is provided in front of a main body 10 in which an engine (not shown) is built. On the rear end side of the operation rod 20, an operation unit 30 is formed so that it can be gripped by an operator, and a throttle lever (driving state control means) 31 is mounted on the lower side and a lock lever (state switching means) 32 is mounted on the upper side. Is provided. An angle adjusting lever (angle adjusting means) 33 is also provided on the upper side of the operation unit 30 in front of the lock lever 32.

  An elongated flat blade guide 43 is fixed to the front end side of the operation rod 20 via a first gear case 41 and a second gear case (gear case) 42, and the two blades 44 are mounted on the blade guide 43. The blade guides 43 reciprocate in opposite directions along the longitudinal direction of the blade guide 43 (the front-rear direction in the state of FIG. 1). Here, in FIG. 1, a blade guide 43 and two blades 44 are stacked in the vertical direction. Since the side surface of the blade 44 that protrudes from the blade guide 43 in the direction perpendicular to the paper surface is subjected to a cutting operation, the side surface can be used for cutting.

  FIG. 2 is an enlarged top view (a) and side view (b) showing the structure before and after the operating rod 20 in the pole hedge trimmer 1. A drive shaft (not shown) that is connected to the engine crankshaft in the main body 10 via a centrifugal clutch and is rotationally driven is provided coaxially in the operation rod 20 through the operation portion 30. The rotational motion of the drive shaft is transmitted from the first gear case 41 to the second gear case 42 through a plurality of bevel gears so that the direction of the rotational motion axis changes. The first gear case 41 is fixed to the front end portion of the operating rod 20, and the blade guide 43 is fixed to the second gear case 42. The second gear case 42 and the blade guide 43 are rotatable with respect to the first gear case 41 in a vertical plane. The axis of rotation is the left-right direction (in FIG. 1 and FIG. 2B, the vertical direction to the paper surface, and in FIG. 2A, the vertical direction of the paper surface). Similarly to the technique described in Patent Document 1, even if the second gear case 42 rotates with respect to the first gear case 41, the rotational movement of the drive shaft from the first gear case 41 side to the second gear case 42 side is via the bevel gear. Transmitted in the same way.

  The rotational motion transmitted to the inside of the second gear case 42 is converted into a reciprocating motion in the front-rear direction using a cam, whereby the two blades 44 are driven. The drive shaft is the same as the first shaft in Patent Document 1, and the configuration for converting the rotational motion of the drive shaft into the reciprocating motion of the blade 44 and transmitting the same is the same as the structure described in Patent Document 1. Since the blade guide 43 is fixed to the second gear case 42 and the first gear case 41 is fixed to the operating rod 20, the cutting direction by the blade 44 is changed by changing the angle of the second gear case 42 with respect to the first gear case 41. Can do. 1 and 2, this direction is parallel to the front-rear direction (the extending direction of the operating rod 20).

  Further, the driving state of the blade 44 can be adjusted by the operation amount of pulling the throttle lever (driving state control means) 31 upward. Specifically, by pulling the throttle lever 31 upward, the amount of the mixer supplied by the carburetor connected to the engine increases, the rotational speed of the crankshaft increases, and the operating speed of the blade 44 increases. The throttle lever 31 is biased downward by a spring or the elastic force of the throttle lever 31 itself. When the throttle lever 31 is at the lowest position (when no external force is applied to the throttle lever 31), the crankshaft The rotational speed is a constant low value (idling rotational speed). In this state, since the centrifugal clutch is not in the connected state, the crankshaft rotates but the drive shaft does not rotate. For this reason, unless the operator operates the throttle lever 31, the blade 44 is not driven even after the engine is started.

  Further, the operation of pulling the throttle lever 31 upward in this way is impossible unless the lock lever 32 mounted on the upper side of the operation unit 30 is pushed down. The lock lever 32 is always urged upward by a spring or the elastic force of the lock lever 32 itself. For this reason, after starting the engine, the operator can drive the blade 44 for the first time by grasping the operation unit 30 and pushing the lock lever 32 downward and simultaneously pulling the throttle lever 31 upward. it can. That is, as the state of the lock lever 32, there are a first state in which the throttle lever 31 is fixed in a state in which the blade 44 is not driven and a second state in which an operation to drive the blade 44 by operating the throttle lever 31 is allowed. Is set.

  Since the lock lever 32 is biased to the side where the first state is achieved and the throttle lever 31 is biased to the side where the blade 44 is not driven, for example, an operator accidentally drops the pole hedge trimmer 1 during work. In this case, the operation of the blade 44 is automatically stopped, and the blade 44 is not driven by this even when the throttle lever 31 touches the stone on the ground. For this reason, this pole hedge trimmer 1 can be used efficiently. On the other hand, since the throttle lever 31 and the lock lever 32 are respectively disposed above and below the operation rod 20, the operator performs an operation of pushing the lock lever 32 downward and an operation of pulling the throttle lever 31 upward. Can easily be done simultaneously. The structure of the throttle lever 31 and the lock lever 32 will be described later.

  In this pole hedge trimmer 1, the cutting direction by the blade 44 is adjusted by adjusting the setting angle of the second gear case, so that the cutting operation can be performed. However, the mechanism for rotating the second gear case 42 relative to the first gear case 41 in this way is different from the structure described in Patent Document 1. This point will be described below.

  In the technique described in Patent Document 1, the angle adjustment of the second gear case (blade) is performed by operating a lever fixed to the second gear case (front end side of the operating rod). 1, this angle adjustment is performed by operating an angle adjustment lever (angle adjustment means) 33 mounted on the operation unit 30 side (the rear end side of the operation rod 20). FIG. 3 is a view for explaining a mechanism for adjusting the angle in this case, and shows a cross-sectional structure in the AA direction in FIG. 3A shows a case where the setting angle of the second gear case 42 (blade 44) is the same as that in FIGS. 1 and 2, and FIG. 3B shows the second gear case 42 in the clockwise direction in FIG. The rotated state is shown.

  As shown in FIG. 3, in the operation unit 30, a disk-shaped first pulley 34 to which the angle adjustment lever 33 is fixed so as to follow the radial direction thereof is mounted so as to be rotatable around the rotation axis X. . On the other hand, a second pulley 45 that is rotatable around the rotation axis Y is also provided on the first gear case 41 (not shown in FIG. 3) side. The second gear case 42 is fixed to the second pulley 45. The rotation axis X and the rotation axis Y are both perpendicular to the paper surface in FIG. Since the wire 46 is stretched between the first pulley 34 and the second pulley 45, they rotate in conjunction with each other. The diameter of the portion of the first pulley 34 where the wire 46 is stretched is the same as the diameter of the portion of the second pulley 45 where the wire 46 is stretched. For this reason, the interval between the wires 46 provided vertically is constant in the front-rear direction, and the rotation angle of the first pulley 34 and the rotation angle of the second pulley 45 (second gear case 42) are equal. In FIG. 3, the wire 46 is provided outside the operation rod 20, but it may be provided inside the operation rod 20. Further, instead of the flexible / flexible wire 46, the first pulley 34 and the second pulley 45 can be connected by a high-rigidity rod so that they can be interlocked. In this case, the second pulley 45 can be rotated clockwise or counterclockwise even if the rod is provided only on one of the upper and lower sides in FIG.

  With this configuration, the operator operates the angle adjustment lever 33 to rotate the first pulley 34, thereby rotating the second pulley 45, the second gear case 42 fixed thereto, and the blade guide 43. A set angle (an angle with respect to the operation rod 20) can be adjusted. Thereby, the cutting direction of the blade 44 can be adjusted. At this time, similarly to the technique described in Patent Document 1, the drive shaft can drive the blade 44 even after changing the set angle. In the technique described in Patent Document 1, it is necessary to operate a lever fixed to the second gear case when performing this angle adjustment, whereas in this pole hedge trimmer 1, this adjustment is performed. Similar to the throttle lever 31 and the like, the angle adjustment lever 33 provided on the operation unit 30 side can be used. For this reason, this angle adjustment at the time of work can be performed easily.

  The pole hedge trimmer 1 is configured such that the blade 44 is driven only when the first pulley 34 is fixed (the set angle is fixed). The structure for this will be described below. Also in this fixing, the lock lever 32 is used. FIG. 4 is an enlarged view showing the configuration of the lock lever 32, the throttle lever 31, and the first pulley 34. FIG. 4A shows a state in which the lock lever 32 is not operated and is in the first state. 4 (b) shows a state in which the lock lever 32 is operated and the throttle lever 31 is not operated, and FIG. 4 (c) shows a state in which the lock lever 32 and the throttle lever 31 are operated as seen from the side. FIG. FIG. 5 is a perspective view of the states of FIGS. 4B and 4C as viewed from above.

  As shown in FIG. 4, the throttle lever 31 is rotatable around the throttle lever rotation shaft 31A, and the lock lever 32 is rotatable around the lock lever rotation shaft 32A. The directions of the throttle lever rotation shaft 31A and the lock lever rotation shaft 32A are both left and right (the direction perpendicular to the paper surface in FIG. 4). However, the portions exposed from the operation unit 30 are the rear portion (right side in the figure) of the throttle lever rotation shaft 31A in the throttle lever 31, and the rear portion (right side in the drawing) of the lock lever rotation shaft 32A in the lock lever 32. Only. For this reason, the operation of pulling the throttle lever 31 upward to increase the rotational speed of the crankshaft corresponds to turning the throttle lever 31 counterclockwise in FIG. Further, in order to make the throttle lever 31 operable, an operation for shifting the lock lever 32 from the first state to the second state (an operation for pushing the lock lever 32 downward) is shown in FIG. Corresponds to the clockwise rotation. Contrary to the direction of these operations, as shown by the broken line arrows in FIG. 4A, the throttle lever 31 is urged by a spring and the lock lever 32 is urged by a spring, respectively.

  Here, as shown in FIG. 4, the throttle lever 31 is provided with a claw portion 31 </ b> B that protrudes toward the lock lever 32. The claw portion 31B moves forward (left side in the figure) when the throttle lever 31 rotates counterclockwise from the state of FIG. At the front side (left side in the figure) of the lock lever 32 in the lock lever 32 is a step portion that locks the claw portion 31B when it approaches and suppresses the claw portion 31B from moving forward. A certain nail | claw part latching | locking part 32B is formed. In FIG. 4 (a), neither the lock lever 32 nor the throttle lever 31 is operated, and each spring is biased in the opposite direction, so that the claw portion 31B and the claw portion locking portion 32B come into contact with each other. Be energized. In this state, the claw portion 31B is locked to the claw portion locking portion 32B, and even if the operator holds the throttle lever 31, it is pulled upward (in FIG. 4A, the throttle lever 31 is counterclockwise). It cannot be rotated around). Therefore, even if only the throttle lever 31 is operated from the state shown in FIG. 4A, the throttle lever 31 cannot be pulled upward, and the crankshaft rotational speed is set to the idling state even after the engine is started. Can not be raised from. That is, in FIG. 4A in which the lock lever 32 is in the first state, the blade 44 cannot be driven even if the operator touches the throttle lever 31.

  On the other hand, as shown in FIG. 4B, the operator pushes the lock lever 32 downward (rotates the lock lever 32 clockwise), and the lock lever 32 is in the second state. By doing so, the claw portion locking portion 32B moves upward, so that the claw portion 31B is not locked to the claw portion locking portion 32B. Therefore, as shown in FIG. 4C, in this state, the claw portion 31 is allowed to move forward (left side in the figure), and the operator pulls the throttle lever 31 upward, It can be rotated clockwise. That is, by setting the lock lever 32 to the second state and operating the throttle lever 31, the rotational speed of the crankshaft can be raised from the idling state and the blade 44 can be driven.

  Thus, the lock lever 32 restricts the operation of the throttle lever 31 used to control the driving state of the blade 44. Here, the lock lever 32 is also used to limit the operation of changing the set angle of the second gear case 42 (the cutting direction of the blade 44). For this reason, as shown in FIG. 5, the front end of the lock lever 32 is provided with a protrusion 32 </ b> C that protrudes toward the right side (the back side in the drawing in the state of FIG. 4). Further, a region near the outer periphery of the first pulley 34 is a thickened region 34A that is thickened toward the left side (the front side in FIG. 4). A plurality of grooves (pulley grooves 34B) are formed radially from the rotation axis X in the thickened region 34A. Here, the setting angle of the second gear case 42 is set to be switched stepwise by a plurality of values, and each pulley groove 34B corresponds to each setting angle. Each pulley groove 34B is opened on the side where the rotation axis X is located. For this reason, one of the pulley grooves 34B can be selected, and the protrusion 32C can be engaged with this from the rotation axis X side. In a state where the protrusion 32C is engaged with one pulley groove 34B, the first pulley 34 is restrained from rotating, so the first pulley 34 is fixed at a set angle corresponding to the pulley groove 34A. The second pulley 45 and the second gear case 42 can be fixed. FIG. 5 shows a state in which the protrusion 32C is engaged with the pulley groove 34B in this way.

  Here, when the lock lever 32 is in the first state (the state of FIG. 4A), the protrusion 32C is below the lower end of each pulley groove 34B (inside the thickened region 34A). Located in. Therefore, the protrusion 32C does not engage with any pulley groove 34B, and the first pulley 34 is not locked by the lock lever 32, so that the first pulley 34 can be rotated. In this state, the set angle of the second gear case 42 can be adjusted by operating the angle adjusting lever 33. That is, the cutting direction of the blade 44 can be changed when the lock lever 32 is in the first state.

  As shown in FIG. 4 (b), when the operator operates the lock lever 32 from this state and pushes it downward to enter the second state, the lock lever 32 rotates clockwise in the figure. The portion 32C moves upward and engages one of the pulley grooves 34B. For this reason, when the lock lever 32 is operated, the first pulley 34 is locked by the lock lever 32, the first pulley 34 cannot be rotated, and the setting angle of the second gear case 42 is fixed. . As described above, as shown in FIG. 4C, the operator can pull the throttle lever 31 and drive the blade 44 in this state. In FIGS. 4B and 4C, the angle adjusting lever 33 as shown in FIG. 3A is fixed upward (the blade guide 43 is horizontal). However, by engaging the protrusion 32C with a pulley groove 34B different from this case, the blade guide 43 as shown in FIG. 3B can be fixed in a state inclined from the horizontal.

  That is, by setting the lock lever 32 to the second state, the set angle (the cutting direction of the blade 44) of the second gear case 42 is fixed, and the blade 44 can be driven by pulling the throttle lever 31 in this state. . Thereby, cutting work can be performed.

  At this time, by using the lock lever 32 having the above-described configuration, it is possible to prevent the cutting direction from being changed while the blade 44 is driven. This is the same in the technique described in Patent Document 1. However, in the pole hedge trimmer described in Patent Document 1, the engine stops when the blade cutting direction is changed. In order to resume the cutting operation again after fixing, it was necessary to start the engine again. On the other hand, in the above configuration, the blade 44 is not driven, but the engine is not stopped and is in an idling state. Therefore, the cutting operation can be resumed by releasing the hands from the lock lever 32 and the throttle lever 31 to adjust the cutting direction and then operating the throttle lever 31 after the lock lever 32 is pushed.

  Further, in the pole hedge trimmer described in Patent Document 1, a lever for changing the cutting direction of the blade is fixed to the front end side (second gear case) of the operating rod. On the other hand, the operator grips the rear side of the operating rod at the time of work, and in order to change the cutting direction of the blade, it is necessary to place the pole hedge trimmer once on the ground and then operate this lever. On the other hand, in the pole hedge trimmer 1, the angle adjusting lever 33 used for adjusting the cutting direction of the blade is provided in the operating portion 30 behind the operating rod 20. In addition, a lock lever 32 and a throttle lever 31 that are operated to resume the cutting operation thereafter are also provided in the operation unit 30. Therefore, these operations can be performed while holding the pole hedge trimmer 1 during the cutting operation. At this time, if the cutting direction of the blade 44 is not fixed, the blade 44 is not driven.

  For this reason, in this pole hedge trimmer 1, the angle adjustment of the blade 44 (the angle adjustment of the working member) can be efficiently performed with good workability.

  In the above example, the blade 44 is driven by the engine provided in the main body 10. However, the drive state control means, angle adjustment means, and state switching means having the same functions as described above are also effective in other configurations. For example, a motor can be used as a power source. In this case, a lightweight motor is provided on the gear case side (front end side of the operation rod), and a heavy battery serving as a power source is provided on the main body side (rear end side of the operation rod). Can be provided. In this case, it is not necessary to use a centrifugal clutch, and when the state switching means is in the first state, a configuration may be adopted in which no drive current is supplied to the motor. In this case, for example, in the above-described configuration, if the drive current is not supplied to the motor when the throttle lever is at the lowermost position, the same operation as described above is possible.

  In the above configuration, the throttle lever (drive state control means), the angle adjustment lever (angle adjustment means), and the lock lever (state switching means) having the configuration shown in FIG. 3 and the like are used. However, drive state control means, angle adjustment means, and state switching means of other configurations can also be used. For example, in the above-described configuration, the above-described operation is performed by mechanically (structurally) relating them, but a switch or the like is connected to these, and the above-described operation is performed by electrical connection. It can also be set. This setting is particularly effective when a motor is used as the power source.

  In the above configuration, the work member is driven by the tip of the operation rod, such as a brush cutter, a pole saw (pole chain saw), a pole saver saw, a pole-type cultivator, and the orientation of the work member can be adjusted. This is effective for all portable work machines whose operability is improved.

1 Pole hedge trimmer (portable work machine)
10 Main body 20 Operation rod 30 Operation unit 31 Throttle lever (drive state control means)
31A Throttle lever rotation shaft 31B Claw portion 32 Lock lever (state switching means)
32A Lock lever rotation shaft 32B Claw portion locking portion 32C Projection portion 33 Angle adjustment lever (angle adjustment means)
34 first pulley 34A thickening region 34B pulley groove 41 first gear case 42 second gear case (gear case)
43 Blade guide 44 Blade 45 Second pulley 46 Wire X, Y Rotating shaft

Claims (10)

A portable working machine comprising: an operating rod extending in the front-rear direction; and a working member provided on a front end side of the operating rod and driven by a power source,
Driving state control means operated to control the driving state of the working member;
An angle adjusting means operated to change a setting angle of the working member with respect to the operating rod;
A first state that restricts the working member from being in a driving state and allows the setting angle to be changed by the angle adjusting means, and allows the working member to be in a driving state and allows the working member to be changed by the angle adjusting means. A portable working machine having a second state that restricts changing the set angle.   The portable work machine according to claim 1, further comprising a state switching unit configured to switch between the first state and the second state.   The portable work machine according to claim 2, wherein the state switching means is provided on a rear end side of the operation rod.   4. The state switching unit is capable of switching between the first state and the second state at a plurality of the set angles set by the angle adjusting unit. The portable work machine as described in.   The state switching means limits the drive state control means to a state where the work member is not driven in the first state, and allows the operation of the drive state control means to drive the work member in the second state. The portable work machine according to any one of claims 1 to 4, wherein the portable work machine is characterized in that: The power source is an engine provided on the rear end side of the operation rod,
The portable working machine according to any one of claims 1 to 5, wherein the working member is driven by a crankshaft of the engine via a centrifugal clutch.   7. The portable work machine according to claim 6, wherein the drive state control means is a throttle lever that controls a rotational speed of the crankshaft and is mounted on a rear end side of the operation rod.   The working member is attached to a gear case attached to a front end side of the operating rod, and an angle of the gear case with respect to the operating rod is adjusted by the angle adjusting means. The portable work machine according to any one of the above. The angle adjusting means is an angle adjusting lever mounted on the rear end side of the operating rod,
The said state switching means permits the operation of the angle adjusting lever in the first state, and restricts the operation of the angle adjusting lever in the second state. The portable work machine according to any one of up to 8.   The portable working machine according to any one of claims 1 to 9, wherein the working member is a blade that performs a cutting work by reciprocating.

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