JP2016089696A - Throttle operation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a throttle operation device capable of easily adjusting an opening of a throttle valve by operation of a throttle lever while easily maintaining the opening of the throttle valve in an intermediate opening, and capable of easily adjusting a tension state of a cable connecting the throttle lever with the throttle valve.SOLUTION: In a throttle operation device 40A, one end of an inner cable 422 inserted into an outer tube 421 is connected to a throttle lever 41, and an opening of a throttle valve of an engine is adjusted through the inner cable 422 in accordance with turning operation of the throttle lever 41. The throttle operation device 40A includes a regulating mechanism 70 regulating a turning range of the throttle lever 41 in plural stages, and an adjustment mechanism 60 provided in the vicinity of the throttle lever 41 and adjusting a tension state of the inner cable 422.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a throttle operating device that adjusts the opening of a throttle valve of an internal combustion engine (engine), and more particularly to a throttle operating device that is suitable for application to a portable work machine that uses an engine as a drive source.

  As a throttle operation device applied to a portable work machine using an engine as a drive source, a trigger type throttle operation device and a fixed type throttle operation device are known. In the trigger type throttle operating device, when an operator releases the throttle lever from the operating state, the opening degree of the throttle valve returns to the minimum opening degree (idle rotational opening degree) and the throttle lever is also in the initial position before the operation. Is configured to return. On the other hand, even if an operator releases the throttle lever from the operating state, the fixed throttle operating device maintains the throttle valve opening and the throttle lever operating position in the state when the throttle lever is released. It is comprised so that.

  The trigger-type throttle operating device is highly safe because the engine immediately enters an idle operation state when an operator releases his / her hand from the throttle lever. However, it is difficult to maintain the throttle valve opening at an intermediate opening between the maximum opening and the minimum opening. On the other hand, the fixed throttle operating device can easily maintain the opening of the throttle valve at the intermediate opening. However, even if an operator releases his / her hand from the throttle lever, the engine rotates at that time. Therefore, there is a risk that sufficient safety cannot be secured.

  As a conventional technique for solving such a problem, by adjusting the play amount in the operation of the throttle lever, the opening of the throttle valve when the throttle lever is fully operated, that is, the maximum value of the throttle valve. A throttle operating device configured to be able to adjust the opening is known (see Patent Document 1).

Japanese Patent Laid-Open No. 9-53475

  However, in the prior art, the operation amount of the throttle lever that actually starts to open the throttle valve changes greatly. For this reason, it is not preferable in terms of operability such as giving the operator a sense of incongruity, and it is difficult to adjust the opening of the throttle valve by operating the throttle lever.

  Therefore, the present invention makes it possible to easily adjust the opening degree of the throttle valve by operating the throttle lever, while making it possible to easily maintain the opening degree of the throttle valve at the intermediate opening degree. An object of the present invention is to provide a throttle operating device capable of easily adjusting the tension of a cable connecting the throttle valve and the throttle valve.

  According to one aspect of the present invention, there is provided a throttle operating device that adjusts an opening of a throttle valve of an engine. In this throttle operating device, one end of an inner cable inserted into an outer tube is connected to a throttle lever, and an opening of a throttle valve of the engine is connected via the inner cable in response to a rotation operation of the throttle lever. Adjust. The throttle operating device includes a restriction mechanism that restricts the rotation range of the throttle lever in a plurality of stages, and an adjustment mechanism that is provided near the throttle lever and adjusts the tension of the inner cable.

  In the throttle operating device, the opening degree of the throttle valve when the throttle lever is fully rotated is changed by restricting the rotation range of the throttle lever by the restriction mechanism. For this reason, the operator can easily maintain the opening of the throttle valve at the intermediate opening. Further, even when the rotation range of the throttle lever is restricted by the restriction mechanism, the relationship between the rotation amount of the throttle lever and the opening of the throttle valve does not change. Therefore, it is easy to adjust the opening of the throttle valve by operating the throttle lever even when the rotation range of the throttle lever is restricted. Furthermore, since the adjustment mechanism is provided in the vicinity of the throttle lever, the operator can easily adjust the tension of the inner cable.

It is a figure which shows the external appearance of the mist blower which is an example of the portable working machine with which this invention was applied. It is a figure which shows the state which looked at the power unit of the said mist blower from the rear part side. It is a figure for demonstrating the structure of 1st Embodiment of the throttle operating device applied to the said mist blower, and is a figure which shows the internal structure of the handle | steering_wheel of the said mist blower. It is a figure for demonstrating the effect | action of the adjustment mechanism of the throttle operating device by 1st Embodiment. It is a figure for demonstrating the structure of the control mechanism of the throttle operating device by said 1st Embodiment, and is the principal part figure of FIG. 3 which showed the throttle lever with the imaginary line. It is BB expanded sectional drawing of FIG. It is a figure which shows the external appearance of the said handle seen from the opposite side to FIG. It is the C section enlarged view of FIG. FIG. 6 is a view corresponding to FIG. 5 when a lever member constituting the restriction mechanism of the throttle operating device according to the first embodiment is in a normal position. FIG. 8 is a view corresponding to FIG. 7 when a lever member constituting the restriction mechanism of the throttle operating device according to the first embodiment is in a normal position. It is the F section enlarged view of FIG. 9A. It is the G section enlarged view of FIG. 9A. FIG. 6 is a view corresponding to FIG. 5 when a lever member constituting the restriction mechanism of the throttle operating device according to the first embodiment is rotated from the normal position. It is a figure corresponding to FIG. 7 in the state shown to FIG. 10A. It is the H section enlarged view of Drawing 10A. It is the I section enlarged view of FIG. 10A. FIG. 6 is a view corresponding to FIG. 5 when the lever member constituting the restriction mechanism of the throttle operating device according to the first embodiment is further rotated. It is a figure corresponding to FIG. 7 in the state shown to FIG. 11A. It is the J section enlarged view of Drawing 11A. It is a K section enlarged view of Drawing 11A. It is a figure for demonstrating the structure of 2nd Embodiment of the throttle operating device applied to the said mist blower, and is a figure which shows the internal structure of the handle | steering_wheel of the said mist blower. It is a figure for demonstrating the effect | action of the adjustment mechanism of the throttle operating device by 2nd Embodiment. It is a figure for demonstrating the structure of the control mechanism of the throttle operating device by the said 2nd Embodiment, and is a principal part figure of FIG. It is LL expanded sectional drawing of FIG. It is a figure which shows the external appearance of the said handle seen from the opposite side to FIG. It is MM expanded sectional drawing of FIG. It is a figure corresponding to FIG. 14 when the lever member which comprises the said control mechanism of the throttle operating device by the said 2nd Embodiment exists in a normal position. It is a figure corresponding to FIG. 16 in the state shown to FIG. 18A. It is NN sectional drawing of FIG. 18A. It is OO sectional drawing of FIG. 18A. It is PP sectional drawing of FIG. 18A. FIG. 15 is a view corresponding to FIG. 14 when a lever member constituting the restriction mechanism of the throttle operating device according to the second embodiment is rotated from the normal position. It is a figure corresponding to FIG. 16 in the state shown to FIG. 19A. It is QQ sectional drawing of FIG. 19A. It is RR sectional drawing of FIG. 19A. It is SS sectional drawing of FIG. 19A. FIG. 15 is a view corresponding to FIG. 14 when the lever member constituting the restriction mechanism of the throttle operating device according to the second embodiment is further rotated. It is a figure corresponding to FIG. 16 in the state shown to FIG. 20A. It is TT sectional drawing of FIG. 20A. It is UU sectional drawing of FIG. 20A. It is VV sectional drawing of FIG. 20A.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows the appearance of a mist blower 1 as an example of a portable work machine to which the present invention is applied. The mist blower 1 is used on the back by an operator. As shown in FIG. 1, the mist blower 1 includes a liquid tank 2, a power unit 3, a blower (blower) 4, a blower pipe 5, and a handle 6. Here, the liquid tank 2, the power unit 3, and the blower 4 constitute a backpack that is carried by an operator.

  The liquid tank 2 is formed in a hollow shape extending in the up-down direction, and stores a spraying liquid such as a chemical solution therein. The liquid tank 2 has a back support portion 7 facing the operator's back when the operator carries the back portion on the front side, and the back support portion 7 is provided with a pair of shoulder belts 8a and 8b. It has been. Further, a substantially L-shaped frame 9 is attached to the back surface of the liquid tank 2 in a side view. The frame 9 has an extending portion 9a extending rearward from the vicinity of the bottom of the liquid tank 2, and the power unit 3 and the blower 4 are placed on the extending portion 9a. Specifically, the power unit 3 is disposed on the rear side of the extending portion 9 a of the frame 9, and the blower 4 is disposed between the liquid tank 2 and the power unit 3. A predetermined space is provided between the liquid tank 2 and the blower 4 for the blower 4 to take in air.

FIG. 2 shows a state in which the power unit 3 is viewed from the rear side (back side).
As shown in FIG. 2, the power unit 3 includes an engine 31, an air cleaner 32, a fuel tank 33, a recoil starter 34, and an exhaust muffler 35. The engine 31 is provided with a carburetor 36 and a spark plug (not shown). The carburetor 36 is a device that mixes fuel with the air that has passed through the air cleaner 32 to form an air-fuel mixture, and supplies the air-fuel mixture that has been formed to the engine 31. The carburetor 36 is a throttle valve THV ( (Indicated by a broken line in FIG. 2). The throttle valve THV is always urged in the closing direction, that is, urged to the minimum opening (here, the idle rotation opening).

  Returning to FIG. 1, the blower 4 is a centrifugal fan whose rotating shaft is connected to the output shaft of the engine 31 of the power unit 3. A blower pipe 5 and a pressurizing pipe 10 for pressurizing the liquid tank 2 are connected to the blower 4. The blower 4 is driven by the engine 31 and takes in the air around the mist blower 1 and sends it out. The air sent from the blower 4 is supplied to the blower pipe 5 and supplied to the liquid tank 2 through the pressurizing pipe 10.

  The blower pipe 5 is formed so as to extend from the blower 4 to the front side of the worker who has passed the right side of the liquid tank 2 and carried the backpack. A mixing portion 11 and a nozzle 12 are provided in this order at the tip of the blower tube 5. A part of the blower pipe 5 (here, a connection part with the blower 4) is formed as a bellows pipe 5a.

  The mixing unit 11 and the liquid tank 2 are connected by a liquid feeding pipe 13. The liquid feeding pipe 13 is a pipe for supplying the liquid in the liquid tank 2 to the mixing unit 11, and is arranged along the blower pipe 5. The liquid feeding pipe 13 has a tank side liquid feeding pipe 13a and a mixing section side liquid feeding pipe 13b, and between the tank side liquid feeding pipe 13a and the mixing section side liquid feeding pipe 13b, A switching cock 14 that can switch between supplying the liquid to the mixing unit 11 and stopping the liquid is provided.

  The air sent from the blower 4 and supplied to the blower pipe 5 flows in the blower pipe 5 toward the nozzle 12. Further, the air sent from the blower 4 is supplied to the liquid tank 2 through the pressurizing pipe 10 to pressurize the liquid tank 2, and the liquid in the liquid tank 2 is mixed through the liquid feeding pipe 13. To the section 11. The mixing part 11 has a venturi part (not shown) inside, and mixes the liquid in the liquid feeding pipe 13 (mixing part side liquid feeding pipe 13b) into the air flowing through the blower pipe 5 by the venturi effect. Thereby, the liquid is made mist and discharged from the nozzle 12.

  The handle 6 is disposed at an intermediate portion in the longitudinal direction of the blower pipe 5. The operator usually operates the mist blower 1 while holding the back portion and holding the handle 6 with the right hand. For example, the operator can point the nozzle 12 in a desired direction while using the mist blower 1. Further, the operator can adjust the air volume of the air discharged from the nozzle 12 and change the reach distance of the misted liquid (that is, the liquid spraying range). Further, the operator can operate the switching cock 14 to stop the supply of the liquid to the mixing unit 12 and discharge only air from the nozzle 12.

  Here, the air volume of the air discharged from the nozzle 12 is adjusted by the throttle operating device. Specifically, the throttle operating device adjusts the opening degree of the throttle valve THV of the carburetor 36 of the engine 31 based on the operation by the operator, thereby reducing the rotational speed of the engine 31 (that is, the rotational speed of the blower 4). Thus, the air volume of the air discharged from the nozzle 12 is adjusted. Hereinafter, the throttle operating device will be described.

[First Embodiment]
FIG. 3 is a view for explaining the configuration of the first embodiment of the throttle operating device, and shows the internal structure of the handle 6. Here, the handle 6 in the present embodiment is constituted by a pair of cases divided into left and right, and only one of the cases 6a is shown in FIG. The throttle operating device 40A according to the first embodiment includes a throttle lever 41 and a throttle cable 42 that are rotated by an operator.

  The throttle lever 41 is supported by a shaft portion (not shown) provided in the handle 6 and is provided so as to be rotatable about the rotation axis X. In the present embodiment, the shaft portion is erected on the other case (not shown) of the pair of cases constituting the handle 6, and the other case and the one case 6a are combined. At this time, the cylinder shaft 41a of the throttle lever 41 is inserted. That is, the axis of the shaft portion is the rotation axis X. However, the present invention is not limited to this, and the throttle lever 41 may be provided so as to be rotatable around a predetermined rotation axis X located in the handle 6.

  The throttle lever 41 has an operation unit 411 exposed outside the handle. Further, the throttle lever 41 is constantly urged to the initial rotation position (the state shown in FIG. 3) by a spring 44 provided in the housing 6. The throttle lever 41 normally rotates in the direction of arrow A in FIG. 3 from the initial rotation position when the operation unit 411 is pulled with the index finger of the right hand of the operator holding the handle 6, and the operator By releasing the index finger from the operation unit 411, the original position, that is, the initial rotation position is returned.

  The throttle cable 42 is configured by a so-called Bowden cable, and has an outer tube 421 and an inner cable 422 inserted into the outer tube 421. The throttle lever 41 is connected to a throttle valve THV (provided in the carburetor 36) of the engine 31 via an inner cable 422 and a valve opening / closing member (not shown). Specifically, one end portion of the inner cable 422 extending from one end portion (throttle lever side end portion) 421a of the outer tube 421 is connected to the throttle lever 41, and the other end portion (engine side end) of the outer tube 421 is connected. The other end portion of the inner cable 422 extending from the portion is connected to the valve opening / closing member (not shown).

  The throttle operating device 40A adjusts the opening degree of the throttle valve THV of the engine 31 via the inner cable 422 (and the valve opening / closing member) according to the amount of rotation of the throttle lever 41 by the operator. It is configured.

  Here, the throttle operating device 40A has a lock-off lever 45 that is rotated by an operator in the same manner as the throttle lever 41. If the lock-off lever 45 is not operated, the throttle lever 41 is rotated. It is configured so that it cannot be operated. Further, a switch 46 is provided in the handle 6 for shutting off the power supply (voltage application) to the spark plug of the engine 31 and stopping the engine 31.

  The throttle operating device 40A includes an adjustment mechanism 60 that adjusts the tension of the inner cable 422 and a regulation mechanism 70 that regulates the rotation range of the throttle lever 41 in a plurality of stages. The adjusting mechanism 60 and the regulating mechanism 70 are disposed in the handle 6. That is, the adjustment mechanism 60 and the restriction mechanism 70 are disposed at positions close to each other. Furthermore, the regulation mechanism 70 as well as the adjustment mechanism 60 are disposed in the vicinity of the throttle lever 41.

  The adjusting mechanism 60 moves the throttle lever side end portion 421a of the outer tube 421 along the longitudinal direction of the inner cable 422, thereby adjusting the tension of the inner cable 422. The adjustment mechanism 60 includes an adjustment screw member 61 that is rotated by an operator, an adjuster member 62 that is screwed to the adjustment screw member 61, and a tube holding member 63 that fixes and holds the throttle lever side end 421a of the outer tube 421. And have.

  The adjustment screw member 61 is disposed in the handle 6 so that its axis is orthogonal to the longitudinal direction of the inner cable 422. The head of the adjustment screw member 61 is formed with a hole or groove into which a tip portion of a tool (such as a hexagon wrench or a flat-blade screwdriver) for rotating the adjustment screw member 61 can be inserted. Further, the handle 6 is formed with an insertion hole 51 extending in a direction orthogonal to the longitudinal direction of the inner cable 422 for allowing the tool to be inserted.

  The adjuster member 62 is disposed in the handle 6 in a state where rotation with the adjusting screw member 61 is prevented. That is, the adjuster member 62 is provided so as to move in the axial direction of the adjustment screw member 61 when the adjustment screw member 61 rotates. In the present embodiment, when the adjustment screw member 61 rotates in the first direction, the adjuster 62 moves in a direction approaching the head of the adjustment screw member 61, and the adjustment screw member 61 is in the second direction opposite to the first direction. The adjuster member 62 moves in a direction away from the head of the adjustment screw member 61.

  The adjuster member 62 has a placement surface 621 on which the tube holding member 63 is placed. A guide groove 622 that is inclined at a predetermined angle with respect to the axis of the adjustment screw member 61 and the longitudinal direction of the inner cable 422 is formed on the mounting surface 621.

The tube holding member 63 is provided in the handle 6 so as to be movable in the longitudinal direction of the inner cable 422. On the opposing surface of the tube holding member 63 that opposes the mounting surface 621 of the adjuster member 62, a guide convex portion (slidably fitted in a guide groove 622 formed in the mounting surface 621 of the adjuster member 62 so as to be slidably movable) (Not shown) is formed.
The guide protrusions may be formed on the mounting surface 621 of the adjuster member 62, and the guide grooves may be formed on the facing surface of the tube holding member 63.

Next, the operation of the adjusting mechanism 60 will be described with reference to FIGS.
FIG. 3 shows a state in which the throttle lever side end portion 421 a of the outer tube 421 is in a position closest to the throttle lever 41. In this state, the adjuster member 62 is at a position farthest from the head of the adjustment screw member 61.

  In the state shown in FIG. 3, when the adjustment screw member 61 rotates in the first direction, the adjuster member 62 moves on the adjustment screw member 61 in a direction approaching the head of the adjustment screw member 61. Here, the tube holding member 63 is provided so as to be movable along the longitudinal direction of the inner cable 422, and the guided convex portion formed on the facing surface of the tube holding member 63 is mounted on the adjuster member 62. It is loosely fitted in a guide groove 622 formed on the mounting surface 621 so as to be slidable. For this reason, when the adjuster member 62 moves in a direction approaching the head of the adjustment screw member 61, the tube holding member 63 moves in a direction away from the throttle lever 41 along the longitudinal direction of the inner cable 422. As a result, the throttle lever side end portion 421a of the outer tube 421 moves in a direction away from the throttle lever 41, that is, a direction in which the tension of the inner cable 422 is strengthened, and is held in that position.

  FIG. 4 shows a state in which the throttle lever side end 421 a of the outer tube 421 is at a position farthest from the throttle lever 41. In this state, the adjuster member 62 is in a position closest to the head of the adjustment screw member 61.

  In the state shown in FIG. 4, when the adjustment screw member 61 rotates in the second direction, the adjuster member 62 moves on the adjustment screw member 61 in a direction away from the head of the adjustment screw member 61. Then, the tube holding member 63 moves in a direction approaching the throttle lever 41 along the longitudinal direction of the inner cable 422. As a result, the throttle lever side end 421a of the outer tube 421 moves in the direction in which the throttle lever 41 approaches, that is, in the direction in which the tension of the inner cable 422 is loosened, and is held in that position.

  Therefore, the operator rotates the adjustment screw member 61 of the adjustment mechanism 60 as necessary to move the throttle lever side end portion 421a of the outer tube 421 in the longitudinal direction of the inner cable 422, thereby causing the inner cable 422 to move. The tension of the can be adjusted. Specifically, the operator inserts the tool into the insertion hole 51 formed in the handle 6, that is, accesses the adjustment screw member 61 from the direction orthogonal to the longitudinal direction of the inner cable 422 to access the adjustment screw member. By appropriately rotating 61, the tension of the inner cable 422 can be adjusted.

Next, the configuration of the restriction mechanism 70 will be described with reference to FIGS.
5 is an essential part view of FIG. 3 showing the throttle lever 41 in an imaginary line, FIG. 6 is an enlarged cross-sectional view along BB of FIG. 5, and FIG. 7 is a view from the opposite side to FIG. FIG. 8 is an enlarged view of a portion C in FIG. 5.

  As shown in FIGS. 5 to 8, the regulation mechanism 70 is interlocked with the lever member 71 that is rotated by the operator, the rotation link member 72 that is connected to the lever member 71, and the rotation link member 72. And a stopper member 73 that moves. The restricting mechanism 70 prevents the throttle lever 41 from rotating further by the protrusion 412 formed on the throttle lever 41 coming into contact with the stopper member 73 when the throttle lever 41 rotates by a predetermined amount. It is configured as follows.

  The lever member 71 is disposed on the outer surface of the handle 6 (case 6a), and is rotated by an operator from the normal position (the state shown in FIG. 7) in the arrow D direction and the arrow E direction. The rotation link member 72 is disposed closer to the inner bottom surface of the handle 6 (case 6a) than the throttle lever 41 in the handle 6 (see FIG. 6). The lever member 71 and the turning link member 72 are integrally connected, and the turning link member 72 is also turned when the lever member 71 is turned.

  As shown in FIG. 6, the lever member 71 and the rotation link member 72 include a polygonal (for example, hexagonal) convex portion 71 a formed on the lever member 71 on the base shaft portion 72 a of the rotation link member 72. Relative rotation with each other is prevented by being inserted into the corresponding recess 72b. Then, a bolt 74 with a spring washer penetrating the lever member 71 and the rotation link member 72 is inserted from the lever member 71 side and screwed into a female screw portion 72c embedded in the base shaft portion 72a of the rotation link member 72. ing. Thus, the lever member 71 and the rotation link member 72 are attached to the handle 6 in a state where they are connected so as to rotate integrally around the same rotation axis X as the throttle lever 41. It should be noted that on the side opposite to the lever member 71 side of the rotation link member 72, the throttle lever 41 can rotate on the outer peripheral surface of the cylindrical shaft portion 41a of the throttle lever 41 into which the shaft portion is inserted. A cylindrical portion 72d for housing is provided.

  The rotation link member 72 includes a locked portion 721 that is locked to a locking projection 47 provided in the handle 6, and a stopper position adjusting portion 722 that mainly changes the position of the stopper member 73. (See FIG. 5). The locked portion 721 and the stopper position adjusting portion 722 are formed to extend radially outward from the base shaft portion 72a (that is, the direction orthogonal to the rotation axis X), and in the circumferential direction of the base shaft portion 72 (that is, the rotation). In the direction of rotation of the moving link member 72). Further, in the present embodiment, the locking projection 47 is formed by, for example, bending a leaf spring material, and is attached to a predetermined position on the inner surface of the case 6a so that the tip side thereof faces the rotation axis X ( (See FIG. 8).

  The locked portion 721 includes a plurality (four in this case) of locking recesses that are respectively locked to the locking projections 47 according to the rotation position of the rotation link member 72 (that is, the lever member 71). 723a to 723d are formed (see FIG. 8). When any of the locking recesses 723a to 723d is locked to the locking projection 47, that is, when the locking projection 47 enters into any of the locking recesses 723a to 723d, the rotation is performed. The link member 72 (and the lever member 71) is held at the rotation position at that time.

  In the present embodiment, when the lever member 71 is in the normal position shown in FIG. 7, the locking recess 723 b of the locked portion 721 is locked to the locking projection 47 as shown in FIG. 8. It has become. That is, when the lever member 71 is in the normal position, the locking convex portion 47 enters the locking concave portion 723b, whereby the rotating link member 72 (and the lever member 71) is held in the state shown in FIG. Is done. When the lever member 71 is rotated from the normal position in the direction of arrow D, the locked portion 721 is changed to the locking convex portion 47 in the order of the locking concave portion 723b → the locking concave portion 723c → the locking concave portion 723d. Locked. On the other hand, the remaining locking recess 723a is locked to the locking projection 47 only when the lever member 71 is rotated from the normal position in the direction of arrow E.

  The stopper position adjusting unit 722 includes a stopper abutting portion 724 with which a portion on the tip end side of the stopper member 73 abuts, and an arm-shaped switch operation portion 725 formed to protrude from the stopper abutting portion 724 (FIG. 5). reference).

  The stopper contact portion 724 includes a first stopper contact surface 724a and a second stopper contact surface 724b that is continuous with the first stopper contact surface 724a. The first stopper contact surface 724a is formed in a circular arc shape centering on the rotation axis X, and the second stopper contact surface 724b is composed of the first stopper contact surface 724a and the first stopper contact surface 724a. Further, a predetermined portion (here, the outer peripheral surface of the base shaft portion 72a) of the rotation link member 72 closer to the rotation axis X is connected. The stopper abutting portion 724 is configured to stop when the lever member 71 is rotated from the normal position in the arrow D direction and when the lever member 51 rotated in the arrow D direction is returned to the normal position. Change the position of.

  The switch operation unit 725 operates the switch 46 provided in the handle 6 when the lever member 71 is operated in the arrow E direction from the normal position. Specifically, the switch operation unit 725 presses the switch lever 46a to turn on the switch 46. When the switch 46 is operated (ON), the power supply (voltage application) to the spark plug is cut off and the engine 31 is stopped. When the lever member 71 operated in the direction of the arrow E is returned to the normal position, the operation of the switch 46 by the switch operation unit 725 is released (the switch 46 is turned OFF), and the power supply to the spark plug ( The interruption state of voltage application is also released.

  The stopper member 73 is disposed in the handle 6 (inner surface of the case 6a) so as to be movable toward the rotation axis X, that is, in a direction orthogonal to the rotation axis X. The stopper member 73 is guided by a rib or the like provided in the handle 6 and is always urged toward the rotation axis X by the spring 48, and the tip end side thereof is a stopper position adjusting portion 722 ( The stopper abutting portion 724) is positioned so as to be positioned. For this reason, the stopper member 73 moves back and forth in a direction perpendicular to the rotation axis X by the rotation of the rotation link member 72 (movement of the stopper position adjusting unit 722) accompanying the rotation operation of the lever member 71.

  The stopper member 73 has a lever abutting portion 731 for abutting the protruding portion 412 of the throttle lever 41 that has been rotated. The lever abutting portion 731 protrudes toward the protrusion 412 side of the throttle lever 41 and has a plurality of (here, two) lever abutting surfaces (first lever abutting surface 731a and second lever abutting) having different heights. Surface 731b) (see FIG. 5).

  When the stopper member 73 moves from the retracted position shown in FIG. 5 toward the rotation axis X, the lever abutting portion 731 is on the movement locus of the protrusion 412 of the throttle lever 41 as the throttle lever 41 rotates. Configured to be located. When the first lever abutting surface 731a or the second lever abutting surface 731b is located on the movement locus of the protrusion 412 of the throttle lever 41, the protrusion 412 becomes the first when the throttle lever 41 is rotated by a predetermined amount. It abuts on the first lever abutting surface 731a or the second lever abutting surface 731b. As a result, the throttle lever 41 is prevented from being restricted (restricted).

  Next, the operation of the restriction mechanism 70 will be described with reference to FIGS. 9A to 9D, FIGS. 10A to 10D, and FIGS. 11A to 11D.

  9A to 9D show states when the lever member 71 is in the normal position. 9A is a diagram corresponding to FIG. 5, FIG. 9B is a diagram corresponding to FIG. 7, FIG. 9C is an enlarged view of a portion F in FIG. 9A, and FIG. 9D is an enlarged view of a portion G in FIG. FIG.

  As described above, when the lever member 71 is in the normal position (see FIG. 9A), the engaging concave portion 723 b of the locked portion 721 of the rotation link member 72 is the engaging convex portion disposed in the handle 6. 47 (see FIG. 9C). Moreover, the stopper member 73 contacts the first stopper contact surface 724a of the stopper position adjusting portion 722 of the rotation link member 72 (see FIG. 9D). In this state, the stopper member 73 is at the retracted position, that is, the position farthest from the rotation axis X, and the lever contact portion 731 of the stopper member 73 is the movement locus of the protrusion 412 of the throttle lever 41. Not located on top.

  For this reason, even if the throttle lever 41 is rotated, the protrusion 412 of the throttle lever 41 does not come into contact with the lever contact portion 731 of the stopper member 73. That is, the rotation range of the throttle lever 41 is not restricted by the stopper member 73. Therefore, the operator can rotate the throttle lever 41 from the initial rotation position to the maximum rotation position (see FIG. 9A), and fully opens the throttle valve THV, that is, maximizes the opening of the throttle valve THV. The opening can be set.

  10A to 10D show states when the lever member 71 is rotated by a predetermined amount in the direction of arrow D from the normal position. 10A is a diagram corresponding to FIG. 5, FIG. 10B is a diagram corresponding to FIG. 7, and FIG. 10C is an enlarged view of the H portion of FIG. 10A. FIG. 10 (d) is an enlarged view of the portion I in FIG. 10 (a).

  When the lever member 71 is rotated in the direction of arrow D from the normal position, the locking recess 723 c of the locked portion 721 of the rotation link member 72 is moved to the engagement convex portion 47 disposed in the handle 6. Locked (see FIG. 10C). In addition, the stopper member 73 moves toward the rotation axis X by the movement of the stopper position adjustment unit 722 accompanying the rotation of the rotation link member 72, and the stopper position adjustment unit 722 of the rotation link member 72 after the rotation. It abuts on the second stopper abutment surface 724b (see FIG. 10D). Accordingly, the first lever contact 731a of the lever contact portion 731 of the stopper member 73 is positioned on the movement locus of the protrusion 412 of the throttle lever 41.

  Therefore, when the operator rotates the throttle lever 41, the protrusion 412 of the throttle lever 41 comes into contact with the first lever contact surface 731a of the stopper member 73 (see FIG. 10D), and the throttle lever 41 Is prevented from further rotation. Therefore, the operator can adjust the position at which the protrusion 412 of the throttle lever 41 abuts against the stopper member 73 (the first lever abutting surface 731a), that is, between the initial rotation position and the maximum rotation position. The throttle lever 41 can be rotated only up to one intermediate rotation position (see FIG. 10A). That is, the opening degree of the throttle valve THV is limited to the opening degree corresponding to the first intermediate rotation position. In other words, the opening degree of the throttle valve THV when the throttle lever 41 is fully operated becomes the opening degree corresponding to the first intermediate rotation position.

  11A to 11D show a state when the lever member 71 is further rotated in the direction of arrow D from the state shown in FIGS. 10A to 10D. 11A is a diagram corresponding to FIG. 5, FIG. 11B is a diagram corresponding to FIG. 7, FIG. 11C is an enlarged view of a portion J in FIG. 11A, and FIG. 11D is an enlarged view of a portion K in FIG. FIG.

  When the lever member 71 is further rotated in the direction of arrow D from the state shown in FIGS. 10A to 10D, the engaging recess 723 d of the locked portion 721 of the rotating link member 72 is disposed in the handle 6. Locked to the mating protrusion 47 (see FIG. 11C). Further, the stopper member 73 is further moved toward the rotation axis X by the movement of the stopper position adjusting portion 722 accompanying the rotation of the rotation link member 72, and the base shaft portion 72 a of the rotation link member 72 after the rotation is moved. It contacts the outer peripheral surface (see FIG. 11D). As a result, the second lever contact 731 b of the lever contact portion 731 of the stopper member 73 is positioned on the movement locus of the protrusion 412 of the throttle lever 41.

  Therefore, when the operator rotates the throttle lever 41, the projection 412 of the throttle lever 41 comes into contact with the second lever contact surface 731b of the stopper member 73 (see FIG. 11D), and the throttle lever 41 Is prevented from further rotation. Therefore, the operator can only throttle to the position where the protrusion 412 of the throttle lever 41 contacts the stopper member 73, that is, the second intermediate rotation position between the initial rotation position and the first intermediate rotation position. The lever 41 cannot be rotated (see FIG. 11A). That is, the opening degree of the throttle valve THV is limited to the opening degree corresponding to the second intermediate rotation position (<opening degree corresponding to the first intermediate rotation position). In other words, the opening degree of the throttle valve THV when the throttle lever 41 is fully operated becomes the opening degree corresponding to the second intermediate rotation position.

  When the lever member 71 rotated in the direction of arrow D from the normal position is rotated in the direction to return to the normal position, the stopper member 73 is moved by the stopper position adjusting unit 722 of the rotation link member 72. It is pressed and moves in a direction away from the rotation axis X. Thereby, the regulating mechanism 70 changes from the state shown in FIGS. 11A to 11D to the state shown in FIGS. 10A to 10D, the state shown in FIGS. 9A to 9D, or from the state shown in FIGS. 10A to 10D. Returning to the state shown in FIG. 9D.

  Therefore, the operator restricts the turning range of the throttle lever 41 by turning the lever member 71 of the restricting mechanism 70, and accordingly, when the throttle lever 41 is fully operated, the opening degree of the throttle valve THV is increased. An intermediate opening between the minimum opening and the maximum opening can be set. For this reason, even if the operator holds the opening of the throttle valve THV at the intermediate opening, the operator only has to operate the throttle lever 42 fully, and the opening of the throttle valve THV is held at the intermediate opening. Is easy. Further, the relationship between the rotation operation amount of the throttle lever 41 and the opening of the throttle valve THV does not change depending on whether or not the lever member 71 is rotated, that is, whether or not the rotation range of the throttle lever 41 is restricted. Even in a state where the rotation range of the throttle lever 41 is restricted, it is easy to adjust the opening of the throttle valve THV by the rotation operation of the throttle lever 41.

[Second Embodiment]
Next, a second embodiment of the throttle operating device will be described.
FIG. 12 is a view for explaining the configuration of the second embodiment of the throttle operating device, and shows the internal structure of the handle 6. In addition, about the element which is common in 1st Embodiment, the description is abbreviate | omitted suitably using the same code | symbol.

  The throttle operating device 40B according to the second embodiment also adjusts the opening degree of the throttle valve THV of the engine 31 via the inner cable 422 (and the valve opening / closing member) according to the amount of rotation of the throttle lever 41 by the operator. Configured to adjust. The throttle operating device 40B includes an adjusting mechanism 80 that adjusts the tension of the inner cable 422 and a regulating mechanism 90 that regulates the rotation range of the throttle lever 41 in a plurality of stages.

  Both the adjusting mechanism 80 and the regulating mechanism 90 are disposed in the handle 6. That is, the adjustment mechanism 80 and the restriction mechanism 90 are disposed at positions close to each other. Furthermore, the regulation mechanism 90 as well as the adjustment mechanism 80 are disposed in the vicinity of the throttle lever 41.

  Similar to the adjustment mechanism 60 in the first embodiment, the adjustment mechanism 80 moves the throttle lever side end 421a of the outer tube 421 to the inner cable 422 along the longitudinal direction, thereby adjusting the tension of the inner cable 422. To do. The adjustment mechanism 80 includes an adjustment screw member 81 that is rotated by an operator, and a tube holding member 82 that fixes and holds the throttle lever side end 421a of the outer tube 421.

  The adjustment screw member 81 is disposed in the handle 6 so that its axis is along the longitudinal direction of the inner cable 422, that is, parallel to the longitudinal direction of the inner cable 422. The head of the adjustment screw member 81 is formed with a hole or groove into which a tip portion of a tool (such as a hexagon wrench or a flat-blade screwdriver) for rotating the adjustment screw member 81 can be inserted. The handle 6 is formed with an insertion hole 52 extending in parallel to the longitudinal direction of the inner cable 422 for allowing the tool to pass therethrough. In the present embodiment, the root portion of the handle 6 connected to the blower tube 5 is located outside the blower tube 5, and the insertion hole 52 is formed in the root portion of the handle 6.

  The tube holding member 82 is disposed in the handle 6 so as to be movable in the longitudinal direction of the inner cable 422. The tube holding member 82 has a female screw portion 821 that is screwed into the adjustment screw member 81. Here, a nut attached to the tube holding member 82 by press-fitting or the like constitutes a female screw portion 821. When the adjustment screw member 81 rotates, the tube holding member 82 is configured to move along the longitudinal direction of the inner cable 422.

  In the moving mechanism 80, when the adjusting screw member 81 rotates in the first direction, the tube holding member 82 moves in the direction approaching the throttle lever 41 along the longitudinal direction of the inner cable 422. Thereby, the throttle lever side end portion 421a of the outer tube 421 moves in a direction approaching the throttle lever 41, that is, a direction in which the tension of the inner cable 422 is loosened, and is held in the same position.

  On the other hand, when the adjustment screw member 81 rotates in the second direction opposite to the first direction, the tube holding member 82 moves in the direction away from the throttle lever 41 along the longitudinal direction of the inner cable 422. As a result, the throttle lever side end portion 421a of the outer tube 421 moves in a direction away from the throttle lever 41, that is, a direction in which the tension of the inner cable 422 is strengthened, and is held in that position.

  Therefore, the operator rotates the adjustment screw member 81 of the adjustment mechanism 80 as necessary to move the throttle lever side end 421a of the outer tube 421 in the longitudinal direction of the inner cable 422, thereby causing the inner cable 422 to move. The tension of the can be adjusted. Specifically, the operator inserts the tool into the insertion hole 52 formed in the handle 6, that is, accesses the adjustment screw member 81 in parallel with the longitudinal direction of the inner cable 422 and moves the adjustment screw member 81. By appropriately rotating, the tension of the inner cable 422 can be adjusted.

  12 shows a state where the throttle lever side end 421a of the outer tube 421 is in a position closest to the throttle lever 41, and FIG. 13 shows the throttle lever side end 421a of the outer tube 421. Shows a state in which it is at a position farthest from the throttle lever 41.

Next, the configuration of the restriction mechanism 90 will be described with reference to FIGS.
14 is an essential part view of FIG. 12, FIG. 15 is an LL enlarged sectional view of FIG. 14, and FIG. 16 is a view showing an appearance of the handle 6 viewed from the opposite side to FIG. FIG. 17 is an enlarged sectional view taken along line MM in FIG.

  As shown in FIGS. 14 to 17, the restriction mechanism 90 is interlocked with the lever member 91 that is rotated by an operator, the rotation link member 92 that is connected to the lever member 91, and the rotation link member 92. And a stopper member 93 that moves. The restricting mechanism 90 prevents the throttle lever 41 from rotating further when the protrusion 412 formed on the throttle lever 41 contacts the stopper member 93 when the throttle lever 41 rotates a predetermined amount. It is configured as follows.

  The lever member 91 is disposed on the outer surface of the handle 6 (case 6a), and is rotated by the operator from the normal position (the state shown in FIG. 16) in the arrow D direction and the arrow E direction. The rotation link member 92 is disposed in the handle 6 closer to the inner bottom surface of the handle 6 (case 6a) than the throttle lever 41 (see FIG. 15). The lever member 91 and the turning link member 92 are integrally connected, and the turning link member 92 is also turned when the lever member 91 is turned.

  As shown in FIG. 15, the lever member 91 and the rotation link member 92 are formed with a polygonal (for example, hexagonal) convex portion 91 a formed on the lever member 91 on the base shaft portion 92 a of the rotation link member 92. The relative rotation of each other is prevented by being inserted into the corresponding recess 92b. A bolt 94 with a spring washer penetrating the lever member 91 and the rotation link member 92 is inserted from the lever member 91 side and screwed into a female screw portion 92c embedded in the base shaft portion 92a of the rotation link member 92. ing. Thus, the lever member 91 and the rotation link member 92 are attached to the handle 6 in a state where they are connected so as to rotate integrally around the same rotation axis X as the throttle lever 41. The throttle lever 41 can be rotated on the outer peripheral surface of the cylindrical shaft portion 41a of the throttle lever 41 into which the shaft portion is inserted on the opposite side of the rotation link member 92 from the lever member 91 side. A cylindrical portion 92d is provided in the housing.

  The rotation link member 92 has a stopper position adjusting portion 922 for changing the position of the stopper member 93. The stopper position adjusting portion 922 is formed to extend radially outward from the base shaft portion 92a (that is, the direction orthogonal to the rotation axis X), and has a guide shaft portion 923 at the tip thereof (see FIG. 15). ).

  The stopper member 93 is formed in an arc shape centered on the rotation axis X, and is disposed on the handle 6 so as to be movable in parallel to the rotation axis X. Specifically, the stopper member 93 is separated from the inner bottom surface of the handle 6 (case 6a) in parallel with the rotation axis X by the guide portions 53a and 53b erected in the handle 6 at both ends. It is held so as to be movable in the direction and the approaching direction (see FIGS. 14 and 15).

  As shown in FIG. 17, the stopper member 93 is formed with a guide hole 931 through which the guide shaft portion 923 of the rotation link member 92 is inserted. The guide hole 931 includes a long hole portion 931a extending in the rotation direction of the rotation link member 92 and an inner bottom surface side of the handle 6 (case 6a) with respect to the rotation direction of the rotation link member 92 from the long hole portion 931a. And an inclined hole portion 931b extending in an inclined manner. Therefore, when the guide shaft portion 923 of the rotation link member 92 moves along with the rotation of the rotation link member 92, the stopper member 93 moves in parallel to the rotation axis X by the inclined hole portion 931b of the guide hole 931. Will do.

  The stopper member 93 has a lever abutting portion 932 for abutting against the protruding portion 412 of the throttle lever 41 that has been rotated. The lever abutting portion 932 is formed so as to protrude from the surface of the stopper member 93 on the rotation axis X side, and a plurality of different heights (here, two) where the protruding portion 412 of the throttle lever 41 that has been rotated abuts. Two lever contact surfaces (first lever contact surface 932a, second lever contact surface 932b).

  When the stopper member 93 is moved in parallel with the rotation axis X from the retracted position shown in FIGS. 15 and 17, the lever contact portion 932 is specifically moved in a direction away from the inner bottom surface of the handle 6. When it moves, it is configured to be positioned on the movement locus of the protrusion 412 of the throttle lever 41 as the throttle lever 41 rotates. When the first lever contact surface 932a or the second lever contact surface 932b of the lever contact portion 932 is positioned on the movement locus of the protrusion 412 of the throttle lever 41, the throttle lever 41 is rotated by a predetermined amount. Further, the protrusion 412 of the throttle lever 41 contacts the first lever contact surface 932a or the second lever contact surface 932b. As a result, the throttle lever 41 is prevented from being restricted (restricted).

  Next, the operation of the regulating mechanism 90 will be described with reference to FIGS. 18A to 18E, FIGS. 19A to 19E, and FIGS. 20A to 20E.

  18A to 18E show a state where the lever member 91 is in the normal position. 18A is a diagram corresponding to FIG. 14, FIG. 18B is a diagram corresponding to FIG. 16, and FIG. 18C is an NN cross-sectional view of FIG. 18A. 18 (d) is a cross-sectional view taken along line OO in FIG. 18 (a), and FIG. 18 (e) is a cross-sectional view taken along line PP in FIG. 18 (a).

  When the lever member 91 is in the normal position (see FIG. 18B), the stopper member 93 is in the retracted position, that is, the position closest to the inner bottom surface of the handle 6 (see FIGS. 18C to 18E). Further, the guide shaft portion 923 of the rotation link member 92 inserted into the guide hole 931 of the stopper member 93 is formed into the long hole portion 931a of the guide hole 931, more specifically, the long hole portion 931a and the inclined hole portion 931b. (See FIGS. 18D and 18E). In this state, the lever contact portion 932 of the stopper member 93 is not located on the movement locus of the protrusion 412 of the throttle lever 41.

  For this reason, even if the throttle lever 41 is rotated, the protrusion 412 of the throttle lever 41 does not come into contact with the lever contact portion 932 of the stopper member 93. That is, the rotation range of the throttle lever 41 is not restricted by the stopper member 93. Therefore, the operator can rotate the throttle lever 41 from the initial rotation position to the maximum rotation position (see FIG. 19A), thereby opening the throttle valve THV fully, that is, opening the throttle valve THV. The degree can be the maximum opening.

  19A to 19E show a state in which the lever member 91 is rotated by a predetermined amount in the direction of arrow D from the normal position. 19A is a view corresponding to FIG. 14, FIG. 19B is a view corresponding to FIG. 16, FIG. 19C is a QQ cross-sectional view of FIG. 19A, and FIG. It is R sectional drawing, FIG. 19E is SS sectional drawing of FIG. 19A.

  When the lever member 91 is rotated from the normal position in the direction of the arrow D, the guide shaft portion 923 of the rotation link member 92 inserted into the guide hole 931 of the stopper member 93 causes the guide hole 931 to be the long hole portion 931a. To move to the inclined hole portion 931b. Then, the stopper member 93 is pushed up by the guide shaft portion 923 and moves in a direction away from the inner bottom surface of the handle 6 in parallel with the rotation axis X (see FIGS. 19C to 19E). Thereby, the first lever contact surface 932a of the lever contact portion 932 of the stopper member 93 is positioned on the movement locus of the protrusion 412 of the throttle lever 41.

  For this reason, when the operator rotates the throttle lever 41, the protrusion 412 of the throttle lever 41 contacts the first lever contact surface 932a of the stopper member 93 (see FIG. 19D). Is prevented from rotating. Therefore, the operator can adjust the position at which the protrusion 412 of the throttle lever 41 abuts against the stopper member 93 (the first lever abutting surface 932a), that is, between the initial rotation position and the maximum rotation position. The throttle lever 41 can be rotated only up to one intermediate rotation position (see FIG. 19A). That is, the opening of the throttle valve THV is limited to an opening corresponding to the first intermediate rotation position (<the maximum opening) or less. In other words, the opening degree of the throttle valve THV when the throttle lever 41 is fully operated becomes the opening degree corresponding to the first intermediate rotation position.

  20A to 20E show a state where the lever member 91 is further rotated in the direction of arrow D from the state shown in FIGS. 19A to 19E. 20A is a view corresponding to FIG. 14, FIG. 20B is a view corresponding to FIG. 16, FIG. 20C is a TT cross-sectional view of FIG. 20A, and FIG. It is U sectional drawing, FIG. 20E is VV sectional drawing of FIG. 20A.

  When the lever member 91 is further rotated in the direction of arrow D from the state shown in FIGS. 19A to 19E, the guide shaft portion 923 of the rotation link member 92 inserted into the guide hole 931 of the stopper member 93 becomes the guide hole. The inclined hole 931b of 931 is further moved. Then, the stopper member 93 is further pushed up by the guide shaft portion 923 and further moves in a direction away from the inner bottom surface of the handle 6 in parallel with the rotation axis X (see FIGS. 20C to 20E). Accordingly, the second lever contact surface 932 b of the lever contact portion 932 of the stopper member 93 is positioned on the movement locus of the protrusion 412 of the throttle lever 41.

  For this reason, when the operator rotates the throttle lever 41, the protrusion 412 of the throttle lever 41 contacts the second lever contact surface 932b of the stopper member 93 (see FIG. 20D). Is prevented from rotating. Therefore, the operator can adjust the position at which the protrusion 412 of the throttle lever 41 contacts the stopper member 93 (the second lever contact surface 932b), that is, between the initial rotation position and the first intermediate rotation position. The throttle lever 41 can only be turned to the second intermediate turning position (see FIG. 20A). That is, the opening of the throttle valve THV is limited to an opening corresponding to the second intermediate rotation position (<an opening corresponding to the first intermediate rotation position) or less. In other words, the opening degree of the throttle valve THV when the throttle lever 41 is fully operated becomes the opening degree corresponding to the second intermediate rotation position.

  When the lever member 91 that has been rotated in the direction of arrow D from the normal position is rotated in the direction to return to the normal position, the stopper member 93 is pushed down by the guide shaft portion 923 of the rotation link member 92. As a result, it moves in a direction approaching the inner bottom surface of the handle 6 in parallel with the rotation axis X. Thereby, the regulation mechanism 90 changes from the state shown in FIGS. 20A to 20E to the state shown in FIGS. 19A to 19E, the state shown in FIGS. 18A to 18E, or from the state shown in FIGS. 19A to 19E. Returning to the state shown in FIG. 18E.

  Therefore, the operator restricts the turning range of the throttle lever 41 by turning the lever member 91 of the restricting mechanism 90, so that when the throttle lever 41 is fully operated, the opening degree of the throttle valve THV is increased. An intermediate opening between the minimum opening and the maximum opening can be set. Therefore, as in the first embodiment, the operator can easily maintain the opening of the throttle valve THV at an intermediate opening and adjust the opening of the throttle valve THV by rotating the throttle lever 41. It is. Although not described, also in this embodiment, when the lever member 91 is turned from the normal position in the direction of arrow E (see FIG. 16), the switch 46 is turned on and the spark plug is connected to the spark plug. Power supply (voltage application) is cut off.

  As described above, the throttle operating devices 40A and 40B according to the present embodiment are provided in the vicinity of the throttle lever 41 and the inner cables 422 provided in the vicinity of the throttle lever 41 and the restriction mechanisms 70 and 90 that restrict the rotation range of the throttle lever 41 in a plurality of stages. Adjusting mechanisms 60 and 80 for adjusting the tension of the first and second members. The operator can change the opening degree of the throttle valve THV of the engine 31 when the throttle lever 41 is fully rotated by appropriately using the restriction mechanisms 70 and 90. For this reason, the operator can easily maintain the opening degree of the throttle valve THV at the intermediate opening degree.

  Here, the regulation mechanisms 70 and 90 regulate the rotation range of the throttle lever 41 and do not change the tension of the inner cable 422 or the like. That is, the relationship between the rotation operation amount of the throttle lever 41 and the opening degree of the throttle valve THV does not change depending on whether the restriction mechanisms 70 and 90 are used. Therefore, the operator can easily adjust the opening degree of the throttle valve THV by the rotation operation of the throttle lever 41 even when the rotation range of the throttle lever 41 is restricted.

  Further, since the adjustment mechanisms 60 and 80 are provided in the vicinity of the throttle lever 41, the operator can easily adjust the tension of the inner cable 422. In particular, in this embodiment, the operator can easily finely adjust the intermediate opening of the throttle valve THV by adjusting the tension of the inner cable 422 in a state where the rotation range of the throttle lever 41 is restricted, for example. Is possible.

  In the present embodiment, the restriction mechanisms 70 and 90 include lever members 71 and 91 that are rotated, rotation link members 72 and 92 that are integrally connected to the lever members 71 and 91, and the throttle lever 41. And stopper members 73 and 93 that prevent the throttle lever 41 from rotating further when the protrusion 412 of the throttle lever 41 comes into contact with the throttle lever 41 when the fixed amount is rotated. The stopper members 73, 93 move in conjunction with the rotation of the rotation link members 72, 92, so that the predetermined amount, that is, the throttle until the protrusion 412 of the throttle lever 41 contacts the stopper members 73, 93. The amount of rotation of the lever 41 is configured to change. For this reason, the operator regulates the turning range of the throttle lever 41 by turning the lever members 71 and 91, and thereby the throttle valve THV when the throttle lever 41 is fully turned. The opening can be changed.

  Here, in the restriction mechanism 70, the stopper member 73 is configured to move in a direction orthogonal to the rotation axis X of the throttle lever 41. In the restriction mechanism 90, the stopper member 93 is configured to rotate the rotation axis X of the throttle lever 41. It is comprised so that it may move in parallel with.

  In the present embodiment, the adjustment mechanisms 60 and 80 are configured to adjust the tension of the inner cable 422 by moving the throttle lever side end portion 421a of the outer tube 421 in the longitudinal direction of the inner cable 422. Specifically, the adjustment mechanisms 60 and 80 hold the adjustment screw members 61 and 81 to be rotated and the throttle lever side end portion 421a of the outer tube 422 and interlock with the rotation operation of the adjustment screw members 61 and 81. And tube holding members 63 and 82 that move along the longitudinal direction of the inner cable 422. For this reason, the operator can adjust the tension of the inner cable 422 by rotating the adjustment screw members 61 and 81 to move the tube holding members 63 and 82.

  Here, the heads of the adjusting screw members 61 and 81 are located in the handle 6 to prevent a rotation operation unintended by the operator. Here, in the adjustment mechanism 60, the operator accesses the adjustment screw member 61 from a direction orthogonal to the longitudinal direction of the inner cable 422 and rotates the adjustment screw member 61. On the other hand, in the adjustment mechanism 80, the operator accesses the inner cable 422 from the longitudinal direction (parallel to the longitudinal direction) to the adjustment screw member 81 and rotates the adjustment screw member 81.

  In the throttle operating device, the adjusting mechanisms 60 and 80 and the regulating mechanisms 70 and 90 can be appropriately combined. That is, the throttle operating device can include the adjustment mechanism 60 and the restriction mechanism 90, or can include the adjustment mechanism 80 and the restriction mechanism 70.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and it is needless to say that further modifications and changes can be made based on the technical idea of the present invention. .

  DESCRIPTION OF SYMBOLS 1 ... Mist blower (portable working machine), 2 ... Liquid tank, 3 ... Power unit, 4 ... Blower, 5 ... Blower, 6 ... Handle, 40A, 40B ... Throttle operating device, 41 ... Throttle lever, 42 ... Throttle cable , 60 ... adjustment mechanism, 61 ... adjustment screw member, 62 ... adjuster member, 63 ... tube holding member, 70 ... regulation mechanism, 71 ... lever member, 72 ... rotating link member, 73 ... stopper member, 80 ... adjustment mechanism, 81 ... Adjusting screw member, 82 ... Tube holding member, 90 ... Regulating mechanism, 91 ... Lever member, 92 ... Rotating link member, 93 ... Stopper member, 421 ... Outer tube, 421a ... Throttle lever side end of outer tube, 422 ... Inner cable, THV ... Throttle valve

Claims (8)

One end of an inner cable inserted into the outer tube is connected to a throttle lever, and the throttle operating device adjusts the opening of the throttle valve of the engine via the inner cable in accordance with the turning operation of the throttle lever. And
A restriction mechanism for restricting the rotation range of the throttle lever in a plurality of stages;
An adjustment mechanism provided in the vicinity of the throttle lever for adjusting the tension of the inner cable;
Including a throttle operating device. The regulation mechanism is
A lever member to be rotated,
A pivot link member integrally connected to the lever member;
A stopper member that contacts the throttle lever when the throttle lever rotates by a predetermined amount and prevents further rotation of the throttle lever, and moves in conjunction with the rotation of the rotation link member. A stopper member that changes the predetermined amount,
The throttle operating device according to claim 1, comprising:   The throttle operating device according to claim 2, wherein the stopper member moves in a direction orthogonal to a rotation axis of the throttle lever.   The throttle operating device according to claim 2, wherein the stopper member moves in parallel with a rotation axis of the throttle lever.   The said adjustment mechanism adjusts the tension | tensile_strength of the said inner cable by moving the throttle lever side edge part of the said outer tube along the longitudinal direction of the said inner cable. Throttle operating device. The adjustment mechanism is
An adjusting screw member to be rotated,
A holder member that holds the throttle lever side end of the outer tube and moves along the longitudinal direction of the inner cable in conjunction with the rotation operation of the adjustment screw member;
The throttle operating device according to claim 5, comprising:   The throttle operating device according to claim 6, wherein the adjusting screw member is rotated by being accessed from a direction orthogonal to the longitudinal direction of the inner cable.   The throttle operating device according to claim 6, wherein the adjustment screw member is rotated and accessed in parallel with a longitudinal direction of the inner cable.