JPH0345542Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a gripping member for a power working machine such as a brush cutter used for weeding. It is related to work equipment.

[Conventional technology]

Brush cutters, which are a type of power working equipment and are used for weeding work, generally have a throttle lever that adjusts the opening of the throttle valve in the engine's intake system, and an engine switch that turns the engine's ignition circuit on and off. Equipped with: Previously, the throttle lever was installed at or near a grip attached to the end of the handle pipe.
The engine switch used to be provided on the engine body, but in recent years, from the viewpoint of operability and safety, the engine switch is increasingly being provided on or near the grip. A conventional power working machine in which a throttle lever and an engine switch are provided at or near the grip will be described.

In the grip section of the conventional brush cutter shown in FIG. 6, the handle pipe 10 is bifurcated on the operator's side in order to be gripped by the operator, and the end of each branched section has a grip 12 ( gripping member) is attached. The throttle lever case 14 is fixed to one branched portion of the handle pipe 10 near the grip 12, and the throttle lever 16 is rotatably supported inside the throttle lever case 14. It protrudes to the outside of the throttle lever case 14, and can be rotated by the operator. The throttle wire 18 is connected to the throttle lever case 1
4, one end is locked to the end of a throttle lever 16, and the other end is connected to a throttle valve (not shown) of the engine's intake system. As a result, the opening degree of the intake system throttle valve can be controlled by rotating the throttle lever 16. The stay 20 is fixed to a throttle lever case fixing band at the same location as the throttle lever case 14, and the engine switch 22 is a toggle switch.
It is connected to an ignition circuit (not shown) of the engine via a lead wire 24, and turning on and off of the power to the ignition circuit is controlled by operating the engine switch 22.

In the grip of another conventional brush cutter shown in FIG. 7, the operating unit 26 includes a case 32 that is detachably attached to the cylindrical portion 28 of the handle pipe 10 protruding from the rear end of the grip 12 by tightening with a screw 30. , an engine switch 34 consisting of a slide switch disposed on the lower surface side of the case 32 to which the end of the lead wire 24 is connected;
The throttle lever 36 is rotatably supported within the throttle lever 36 and operates the throttle valve via the throttle wire 18. Further, a lock lever 38 is provided on the side of the case 32, and when the operator releases the throttle lever 36 and the throttle valve becomes almost fully closed,
The next time the throttle lever 36 is pushed in, the lock lever 38 must be operated.

[Problem that the invention attempts to solve]

In the one shown in FIG. 6, the grip 12, throttle lever 16 and engine switch 22 are individually assembled to the handle pipe 10, so the design is poor and the throttle lever cannot be moved while gripping the grip 12. 16 and engine switch 22 are difficult to operate, and there is also a disadvantage that a locking mechanism for the throttle lever 16 is not provided.

In the one shown in FIG. 7, the operability of the engine switch 34 and throttle lever 36 has been improved, and a lock lever 38 is provided, but since the operating unit 26 is manufactured separately from the grip 12, costs are higher, and
It is troublesome to unlock the throttle lever 36 by pushing the lock lever 38 in the axial direction of the grip 12, and this is especially true for power working machines such as brush cutters where the throttle valve must be opened and closed frequently. This increases the complexity of operation and causes deterioration of work efficiency.

The purpose of this invention is to provide a gripping member for a power working machine that has an excellent design, can reduce manufacturing costs by reducing the number of parts, and does not require the complicated locking operation of a throttle lever. It is.

[Means for Solving the Problems] According to this invention, in an operating member whose end part is fitted with a removable gripping member, an engine stop means is attached to the inner edge of the gripping member, and one end is inserted inwardly. An adjustment member is integrally formed with an operating part having a protruding convex portion and a locking part into which one end of a throttle wire connected to the engine is fitted, the other end of which is rotatably supported via an elastic member. Along with being
A fixing member having an abutting portion that can come into contact with the convex portion of the operating portion is rotatably supported, and rotation of the adjusting member can be restricted by operating the fixing member.

[Effect]

Once the operator releases the adjusting member and the gripping member, the operating force of the adjusting member and the fixing member is released, so the adjusting member and the fixing member rotate according to the biasing force of the elastic member. This allows the adjustment member to
Upon returning to the rotational position corresponding to substantially fully closing the throttle valve, the fixed member becomes a rotational position that prevents the next rotational operation of the adjustment member in the direction of increasing the opening degree of the throttle valve.

As a result, when the operator next attempts to operate the adjusting member in order to increase the opening degree of the throttle valve, the operator must grasp the grip 40 and at the same time move the externally protruding portion 80 against the elastic member 90. is pushed into the inside of the grip 40 with the palm of the hand, and the adjusting member is rotated so that the abutting portion of the fixing member is placed in a rotational position where it does not impede rotation of the adjusting member. As the adjustment member is rotated, the throttle wire moves and the opening degree of the throttle valve is increased or decreased.

〔Example〕

This invention will be described below with reference to an embodiment shown in FIGS. 1 to 5.

In FIGS. 1 and 2, a grip 40 as a gripping member has a structure in which it is divided into two in a direction perpendicular to the axial direction, and consists of two case parts 44 that are joined together by bolts 42 or the like. Handle pipe 10 (this handle pipe 1
0 is the same as the handle pipe 10 in FIGS. 6 and 7. ) side, and an operating mechanism storage section 48 on the operator side. A cylindrical hole 50 is formed inside the grip part 46, into which the end of the handle pipe 10 is fitted, and the cylindrical hole 50 is formed inside the grip part 46, into which the end of the handle pipe 10 is fitted.
is fixed to the end of the handle pipe 10 together with the two case parts 44 joined by bolts 42 or the like. The engine switch 52 is disposed within the operating mechanism housing section 48 of the grip 40, and one side of the operating mechanism housing section 48 is exposed to the switch body 54 and the outside of the operating mechanism housing section 48, so that the engine switch 52 can be slid and operated. It is fixed with a screw (not shown) between the button 56 and the button 56 as a part. The engine switch 52 is connected to the engine's ignition circuit (not shown) via a lead wire 24 (same as the lead wire 24 in FIGS. 6 and 7), and the engine switch 52 is manually operated. The power on/off of the ignition circuit is controlled by.

Figure 4 shows the throttle lever 5 as an adjustment member.
8, and in FIGS. 1 to 4, the throttle lever 58 is rotated into the operating mechanism storage portion 48 of the grip 40 via the shaft portion 60 (FIGS. 1 and 2). An external protruding portion 62 that is freely supported and projects to the outside of the operating mechanism storage portion 48; and a locking portion 64 that is disposed within the operating mechanism storage portion 48 and locks the end of the throttle wire 18.
and an operating portion 66 extending between the external protruding portion 62 and the locking portion 64 and disposed within the operating mechanism storage portion 48 . The convex portion 68 is integrally formed at the tip of the operating portion 66 and
It protrudes at right angles from the side of 6. Cylindrical wall part 70
is the shaft portion 6 at the center of the throttle lever 58.
This cylindrical wall portion 70 is formed concentrically with respect to
A locking protrusion 72 and a locking groove 74 are formed near the outer peripheral edge.

FIG. 5 is a detailed perspective view of the lock lever 76 as a fixing member. In FIGS. 1, 2, and 5, the lock lever 76 is rotatably supported in the operating mechanism housing 48 via a shaft 78 parallel to the shaft 60. , an externally protruding portion 80 that protrudes to the outside on the side of the operating mechanism accommodating portion 48 opposite to the side surface of the operating mechanism accommodating portion 48 from which the externally protruding portion 62 of the throttle lever 58 protrudes to the outside; 48 and an internal protruding portion 82 disposed within 48. The abutting portion 84 is connected to the inner protruding portion 82
It has an abutting part 86 that is integrally provided at the tip of the throttle lever 58 and can come into contact with the convex part 68 , and a locking part 88 that can be locked with the locking protrusion 72 of the throttle lever 58 .

1 and 2, the torsion coil spring 90 as an elastic member is connected to the throttle lever 58.
It is disposed within the cylindrical wall portion 70 of the throttle lever 76, and is fitted and locked into the locking groove 74 of the throttle lever 58 at one end, and is in contact with the inner surface side of the externally protruding portion 80 of the lock lever 76 at the other end. The torsion coil spring 90 allows the throttle lever 58 and the lock lever 76 to retain their respective externally projecting portions 62,80.
is biased in a rotational direction in which the operating mechanism storage section 48 projects outward.

The operation of the embodiment will be explained.

The operator uses the brush cutter as a power working machine while holding the grip 40. When the operator releases his hand from the grip 40, the operator's operating force applied to the externally protruding portion 62 of the throttle lever 58 and the externally protruding portion 80 of the lock lever 76 is released, and the throttle lever 58 and the lock lever 76 are pivoted in a direction such that the externally protruding portions 62 and 80 respectively protrude to the outside of the operating mechanism housing 48 by a torsion coil spring 90 and a spring that biases the throttle valve (not shown) in the fully closed direction. 60, 78 and into the position shown in FIG. As a result, the throttle wire 18, whose one end is locked to the locking portion 64 of the throttle lever 58, is pulled toward the throttle valve by the spring that urges the throttle valve in the fully closed direction, and the throttle valve is closed. It becomes almost completely closed.

When the lock lever 76 is in the rotational position shown in FIG. The tip of the portion 82 comes into contact with the abutting portion 86 of the abutting portion 84, and a force is generated that rotates the lock lever 76 in the counterclockwise direction in FIG.
Since the lock lever 76 is in contact with a predetermined portion of the case portion 44 and is prevented from rotating counterclockwise, the externally protruding portion 62 is prevented from being pulled into the grip 40, and the grip lever 76 is prevented from rotating in the longitudinal direction of the grip 40. The throttle wire 18 is also prevented from being pulled in, and the throttle valve is prevented from opening from the fully closed state.

Therefore, when the operator releases the grip 40 to increase the opening degree of the throttle valve, the operator grips the grip 40 and at the same time pushes the external protrusion 80 against the torsion coil spring 90. 1, and rotate the lock lever 76 clockwise in FIG. 1 to the rotation position shown in FIG. 2. As a result, the abutting portion 84 of the internal protruding portion 82 of the lock lever 76 is removed from the rotation path of the convex portion 68 of the operating portion 66 of the throttle lever 58, so that the convex portion 68 of the operating portion 66 of the throttle lever 58 locks onto the lock lever. When the throttle lever 58 becomes rotatable without abutting against the abutting portion 84 of the throttle lever 76 and the operator retracts the external protruding portion 62, the throttle lever 58 moves as shown in FIG. 2, for example. up to the rotational position.
The throttle wire 18 is rotated around the shaft portion 60 against the torsion coil spring 90, and as a result, the throttle wire 18 is pulled in the length direction of the grip 40, and the throttle valve is opened from the fully closed state.

Before starting the engine, push the external protrusion 80 into the grip 40,
The throttle lever 58 is unlocked and the external projection 62 is fully retracted into the grip 40. Then, when the external protruding portion 80 is further pushed into the grip 40 and the external protruding portion 62 is returned, the locking protrusion 72 of the throttle lever 58 locks with the locking portion 88 of the abutting portion 84 of the lock lever 76. , the throttle lever 58 and the lock lever 76 are fixed in the locked rotational position shown in FIG. 3 by the biasing force of the torsion coil spring 90.
For example, the throttle valve opens approximately half of its fully open position. In this way, the engine starts smoothly. When the engine has finished starting, the external protruding portion 62 is slightly pulled inward to the operating mechanism housing 48 to release the locking state between the locking protrusion 72 and the locking portion 88, and the lock lever 76 is moved to the throttle lever 58. Set it to a rotation position that allows rotation. Thereafter, the throttle wire 18 can be operated by operating the externally protruding portion 62, and the opening degree of the throttle valve can be adjusted as desired.

[Effect of idea]

As described above, according to this invention, the adjusting member and the fixing member are supported by the gripping member and assembled integrally, so that the unit to which the adjusting member and the fixing member are assembled is not referred to as the gripping member. There is no need to prepare it separately, and manufacturing costs can be reduced. In addition, due to this integrated structure,
Not only can the design of the gripping member be improved, but also it is possible to prevent a problem in which a unit such as an adjustment member moves relative to the gripping member and the position of the adjustment member or the like changes. Furthermore, since the gripping member to which the adjustment member and the fixing member are assembled can be made of resin, the gripping member can be freely colored, which is advantageous in terms of design.

The operating force of both the adjusting member and the fixing member is applied inward in the radial direction of the gripping member, that is, in the direction in which the operator grips the operating member. It becomes possible to operate the adjustment member while operating it to release the lock, improving operability.

In a preferred embodiment of this invention, the fixed member (lock lever 76) is also provided with a mechanism for holding the throttle valve at a predetermined opening degree (for example, approximately 1/2 of the fully open position) when starting the power working machine. When adding a mechanism, it is possible to avoid an increase in the number of parts and reduce manufacturing costs.

[Brief explanation of drawings]

Figures 1 to 5 relate to an embodiment of this invention, in which Figure 1 is an internal view of the throttle lever in its locked state, Figure 2 is an internal view of the throttle lever in its unlocked state, and Figure 3 is an internal view of the engine. An internal view of the throttle lever and lock lever in the locked state at the time of starting, Fig. 4 is a detailed perspective view of the throttle lever, Fig. 5 is a detailed perspective view of the lock lever, and Figs. 6 and 7 are respectively the conventional It is a figure which illustrates the grip part of the brush cutter. 10... Handle pipe (operating member), 18...
... Throttle wire, 40... Grip (gripping member), 52... Engine switch (engine stop means), 58... Throttle lever (adjusting member),
64...Locking part, 66...Operation part, 68...
Convex portion, 76...Lock lever (fixing member), 84
... Contact portion, 90 ... Torsion coil spring (elastic member).

Claims (1)

[Scope of utility model registration request] An operating member having a removable gripping member fitted to an end thereof has an engine stop means attached to the inner edge of the gripping member, an operating portion that projects inwardly at one end and has a convex portion, and the other end is connected to the engine. An adjustment member integrally formed with a locking portion into which one end of the throttle wire to be connected is fitted is rotatably supported via an elastic member, and is capable of abutting against the convex portion of the operating portion. A gripping member for a power working machine that rotatably supports a fixing member having an abutting portion formed thereon, and is capable of restricting rotation of the adjustment member by operating the fixing member.