JPH048005B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cable operating device used in a portable working machine such as a brush cutter or a backpack-type chemical sprayer for operating the engine control cable of the machine. It is something.

(Prior Art) Conventionally, a cable operating device for engine control in a portable working machine such as a brush cutter, for example, a throttle cable operating device, is described in Utility Model Application No. 57-57235, as shown in Fig. 12. are known.

That is, in the same figure, there is a rotation transmission shaft 1 inside.
The grip 1 is attached to the outer periphery of the operation stick 11 into which the grip 7 is inserted.
5, an annular clamp 1 is divided into two parts, fastened with bolts and nuts 2, and fitted concentrically. Further, a groove 28 extending in the axial direction is formed in the grip 15, and the throttle cable 30 is inserted into the groove 28, so that the tip 31a of the outer cable 31 of the throttle cable 30 is formed in the clamp 1. The through hole 1b extends in the axial direction.

An annular operating body 23 having a throttle operator 1a protruding from its outer periphery is fitted into the clamp 1 so as to be able to move and rotate around the axis, and the throttle cable 30
The distal end 32a of the inner cable 32 is led out from the distal end 31a of the outer cable 31, and the locking member 35 at the front end is connected to the actuating body 23.
is being tightened.

The through hole 1b is formed with an arcuate portion 1c that slopes radially inward within a plane along the axis of the clamp 1, and the inner cable 32 is formed in the arcuate portion 1c.
The tip portions 32a of the two are disposed opposite to each other.

Note that the front end side F of the clamp 1 and the operating body 23
A leaf spring 6 is interposed at the joint portion, and a knurl 39 for generating frictional resistance is formed on the joint surface on the rear end side R.

In the above configuration, while gripping the grip 3, press the thumb against the throttle operator 1a and press it forward to move the actuating body 23 forward (in the direction of arrow F), thereby reducing the frictional resistance caused by the knurling 39. After releasing it, rotate it around the axis.

Due to this rotation, the throttle cable 30
The front end 32a of the inner cable 32 is pulled through the arcuate portion 1c to open the throttle. When the pressure on the operator 1a is released,
It is restored by the spring force of the leaf spring 5.

By the way, according to the above configuration, the distal end portion 32a of the inner cable 32 is pressed against the arcuate portion 1c in the radial direction (arrow N direction) and moves while sliding in the circumferential direction. An excessive load is applied to the operation of pulling out the inner cable 32, and repeated operations not only damage the tip end 32a of the inner cable 32, but also require a great deal of effort to operate the actuating body 23, making it difficult to operate the engine properly. The problem is that it is difficult to perform control and mowing operations.

(Object of the invention) This invention was made to solve the above problems, and there is no risk of damage to the inner cable.
It is an object of the present invention to provide a cable operating device for a portable working machine that has excellent operability.

(Structure of the Invention) A cable operating device for a portable working machine according to the present invention includes a groove in which an inner cable is inserted between a grip main body and an operating body, and a groove in which an inner cable is inserted from the groove in an axial direction and a circumferential direction toward one end of the inner cable. The present invention is characterized in that a guide cylinder has an enlarged part that expands in a fan shape around the circumference formed on the outer periphery, and an escape groove for one end of the inner cable is formed on the end surface of the actuator facing the enlarged part.

(Function) According to the above configuration, since the enlarged part for guiding the inner cable is formed in a fan shape in the axial direction and around the circumference toward one end of the inner cable,
The tip of the inner cable moves in the circumferential direction without being pressed against the bottom surface of the enlarged part, and moves in the longitudinal direction along the side surface of the enlarged part,
Not only can the inner cable be pulled out smoothly and damage to the tip of the inner cable can be effectively prevented, but the actuator can be operated easily, allowing for accurate engine control and mowing work. is easy to do.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 shows the overall structure of a brush cutter, which is a type of portable working machine.
2, an engine 13 for driving the rotary cutter 12 is mounted on the rear end thereof, and a rotation transmission shaft (Fig. (not shown) is inserted. The main rod 10 has grips 14 and 15 attached to its outer periphery to be held by the operator's hands.
It is used as an operation stick 11 that is held in the hand of the worker. The rear grip 14 is fixed to the main rod 10 in a conventional manner.

On the other hand, the front grip 15 is according to the present invention, and as shown in FIG. A main body 20 having a body 18 reinforced with a metal pipe 19 is fixed by a pair of front and rear fixing springs 21. Between the cylindrical body 18 of the main body 20 and the metal pipe 19, a guide cylinder 34 made of synthetic resin is provided at the center in the axial direction A.
is inserted. Further, a notch 22 is provided in the cylinder body 20 at the front side (above side) of the guide cylinder 34, and an actuating body 23 is rotatably attached to the metal pipe 19 facing the notch 22. has been done. This actuating body 23 is constructed by covering the outer periphery of a core material 24 made of synthetic resin with a cylindrical cover 25 made of rubber.

As shown in FIG. 3, the cylindrical body 18 of the main body 20
An insertion hole 27 extending in the axial direction A and a first fitting groove 28 are formed in the guide tube 34 .
A second fitting groove 29 communicating with the rear side of the first fitting groove 28 is formed, and the outer cable 31 of the throttle cable 30 is inserted into the insertion hole 27 and inserted into the first fitting groove 28. At the same time, the inner cable 32 is inserted into the second fitting groove 29, and the stopper stepped portion 3 formed on the guide tube 34 is inserted.
3 with the front end of the outer cable 31,
The position of the outer cable 31 is regulated.
A window 51 is formed at the front end of the first fitting groove 28, and the position of the outer cable 31 can be confirmed through the window 51.

The first fitting groove has an opening 28a to the outer surface of the cylindrical body 18, as shown in FIG.
The fitting groove 29 also has an opening 29a to the outer surface of the cylinder 18, as shown in FIG.

Further, the second fitting groove 29 has an enlarged portion 29 that expands in a fan shape toward the front F, as shown in FIG.
b, and this enlarged portion 29b allows movement of the inner cable 32 during throttle operation, which will be described later.

Furthermore, the core material 24 of the operating body 23 includes a sixth
As clearly shown in the figure, a locking hole 36 for locking a locking member 35 at the front end of the inner cable 32 and a locking hole 36 for locking the locking member 35 at the front end of the inner cable 32 are provided to allow movement of the inner cable 32 during throttle operation, which will also be described later. A relief groove 37 is formed.

As shown in FIG. 7, the core 24 of the actuating body 23 has a flat knurling 39 formed on its rear end surface 24a, and when the operator rotates the actuating body 23 by hand, the knurling 39 is The actuating body 23 is semi-fixed to the main body by slidingly contacting the front end surface 34a of the guide cylinder 34 of the main body 20 shown in FIG. 2 to generate frictional resistance. Further, as shown in FIG. 7, the core material 24 is formed so as to be openable vertically around a so-called pp hinge 41 in order to facilitate attachment of the main body 20 to the cylindrical body 18. A pin insertion hole 43 is provided in the upper half 2 of the core material 24 in the portion 42.
4b and the lower half 24c are provided alternately,
As shown in FIG. 8, the core material 24 is opened and closed by inserting and removing the pin 44 through the pin insertion hole 43.

The structure of the open portion 42 of the core material 24 is such that, as shown in FIG. 9, a plurality of protrusions 45 and recesses 46 that engage with the protrusions 45 are arranged along the axial direction A as shown in FIG. The projection 45 and the recess 4 are individually formed.
The core material 24 may be opened and closed by engaging and disengaging 6.

In the above configuration, when using the brush cutter shown in FIG. 1, an operator holds the two grips 14 and 15 in his hands to support the brush cutter. In this state, the front grip 15 operates the throttle cable 30 by rotating the actuating body 23 with the operator's thumb and forefinger while the main body 20 shown in FIG. 3 is held in one hand of the operator. let FIG. 11 shows a state in which the operating body 23 is rotated.

In FIG. 11, when the operating body 23 is rotated in the P direction, the outer cable 31 is restricted by the stepped portion 33 of the main body 20 so as not to move forward F, and only the inner cable 32 is pulled out in the P direction.
It moves forward F and the throttle is opened. At this time, since the enlarged portion 29b is formed in the second fitting groove 29 of the guide tube 34 of the main body 20, and the relief groove 37 is formed in the operating body 23, the inner cable 32 can be smoothly moved. When the operator stops rotating the operating body 23, the inner cable 3
2 is pulled toward the rear R in FIG. 11, and the actuating body 2
3 returns to its original rotational direction position.

According to the above configuration, since the enlarged portion 29a for guiding the inner cable 32 is formed in a fan shape in the axial direction and around the circumference toward one end of the inner cable 32, as shown in FIG. The tip 32a of 32 is the enlarged portion 29b.
The inner cable 32 moves in the circumferential direction without being pressed against the bottom surface 29c, and moves in the longitudinal direction along the side surface of the enlarged portion 29b, so that the inner cable 32 can be pulled out smoothly. Not only can damage to the mower 32a be effectively prevented, but the actuator 23 can be easily operated, making it easy to accurately control the engine 13 and perform mowing operations.

In the above embodiment, the present invention was applied to the front grip 15 in FIG. 1, but it may also be applied to the rear grip 14.

Further, in the above embodiment, as shown in FIG.
is attached and the main rod 10 is used as the operating rod 11. However, it goes without saying that the present invention can also be applied to a case where a separate operating rod is attached to the main rod 10 and a grip is attached to this operating rod. .

Furthermore, the core material 24 of the operating body 23 shown in FIG.
Knurling 39 for generating frictional resistance
The actuating body 23 shown in Fig. 2 may be loosely fitted into the notch 22 of the main body (fixed side) 20 with a gap in the axial direction without performing the machining. When the grip 15 is released, the operating body 23 automatically returns to the state shown in FIG. ) is automatically released, and the rotation of the cutter 12 in FIG. 1 is stopped.

Furthermore, in addition to operating the throttle cable 30 by the rotation of the operating body 23, another engine control cable, such as a choke cable, may be operated.

(Effects of the Invention) As explained above, according to the present invention, it is possible not only to smoothly pull out the inner cable and effectively prevent damage to the tip of the inner cable, but also to prevent damage to the tip of the inner cable. It is easy to operate and allows for accurate engine control and brush cutting work.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a longitudinal sectional side view showing the main parts of Fig. 1, Fig. 3 is a plan view showing the main parts, and Fig. 4 is Fig. 2 5 is a sectional view taken along the - line of FIG. 2, FIG. 6 is a plan view showing the core material, FIG. 7 is a rear view of the same, and FIG. 8 is a side view of the same. , FIG. 9 is a rear view showing a modified example of the core material, FIG. 10 is a side view of the same, and FIG.
FIG. 1 is a plan view showing the operation, and FIG. 12 is a longitudinal sectional side view showing the main parts of the conventional example. DESCRIPTION OF SYMBOLS 11... Operation stick, 12... Rotating cutter, 13... Engine, 15... Grip, 20... Main body, 23... Operating body, 29... Groove, 29b... Enlarged part, 30... Throttle cable (cable for engine control), 35 ...Locking member, 37...Escape groove.

Claims (1)

[Claims] 1. An operating rod with a rotary cutter attached to the front end and an engine that drives the rotary cutter attached to the rear end, a grip body attached to the outer periphery of the operation rod and held by the operator's hand, and a grip body attached to the grip body. The actuating body is provided with an actuating body that is concentric and rotatably fitted to the operating rod, and an engine control cable to which one end of an inner cable is locked, and the actuating body is rotated by an operator's hand. In a cable operating device for a portable work machine that axially moves the inner cable, there is provided a groove between the grip body and the operating body into which the inner cable is inserted, and a axial movement from this groove toward one end of the inner cable. The guide tube has an enlarged part on its outer periphery that expands in a fan-shape in both direction and circumference, and an escape groove for one end of the inner cable is formed on the end surface of the actuating body facing the enlarged part. Cable operation device for portable work equipment.