JPH0340563Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a portable working machine that includes a front handle at the front part of the main body, which is provided with a blade part such as a saw chain that protrudes forward, and a rear handle at the rear part.

Conventionally, in this type of portable working machine, for example, a chain saw, the rear handle is fixed to the rear of the main body that houses the engine, etc., so depending on the physique of the worker, the distance between the front handle and the rear handle may vary. There were times when the work was difficult because it was not appropriate. Also, when it is necessary to forcefully press the chain saw against a tree to be felled, the distance between the front handle and the rear handle is small, making it impossible to press forcefully and hold the machine stably. There were some shortcomings. This drawback is a common problem in other portable working machines such as hedge trimmers.

In view of this point, the present invention attempts to eliminate the above-mentioned drawbacks by providing a rear handle that is provided at the rear of the main body to which the prime mover is attached, so that it is extendable and the length of the extension is adjustable. It is.

Hereinafter, one embodiment of the present invention will be described in detail using the drawings.

In the figure, the chain saw 1 is constructed as follows. That is, a prime mover (in this embodiment, an engine) 5 is installed inside the main body 3 and is configured as follows. That is, a pin 9 that fits inside the cylinder 7 and is movable back and forth is connected to the crankshaft 13 via a connecting rod 11. This rotational movement of the crankshaft 13 rotates the chain-shaped blade portion 15 of the working device 14 that protrudes forward from the main body 3 via a power transmission mechanism (not shown). Further, a fuel tank 17 and a lubricating oil tank 19 are housed in the front part of the main body 3. Fuel mixed with air by the carburetor 21 is drawn into the cylinder 7 chamber through the intake port 23. Further, a support body 25 is attached to the main body 3 via an elastic body 27, one end of a front handle 29 is fixed to the front part of the support body 25, and the other end is attached via an elastic body (not shown). It is attached to the front part of the main body 3. In the rear handle 31, an outer cylinder 32 provided at one end thereof is fitted to the outer periphery of an inner cylinder 33 provided at the rear of the support body 25 so as to be expandable and contractible in the front-rear direction. A bolt 37 that passes through a long hole 35 provided in the longitudinal direction of the outer cylinder 32 is screwed into the inner cylinder 33, and the bolt 37 fixes the outer cylinder 32 and the inner cylinder 33 so that the length of expansion and contraction can be adjusted freely. are doing. Further, at the other end of the rear handle 31, a long hole 39 is provided in the front-rear direction.

The other end of the rear handle 31 is slidably overlapped with the end of the bracket 43 fixed to the main body 3 via an elastic body (not shown), and is screwed into the bracket 43 through the elongated hole 39. The sliding position is fixed by a bolt 45 that allows adjustment of the sliding position. rear handle 3
1 includes a throttle lever 4 adjacent to the grip portion 48.
9 is pivotably mounted by a pin 51, and one end of a throttle wire 53 is connected to one end of the pin 51. The wire 53 passes through the flexible tube 55 and is connected to a throttle valve (not shown) in the carburetor 21.

In the above configuration, the operator grasps the front handle 29 and the rear handle 31 and operates the engine 5.
When driven, the crankshaft 13 rotates and the blade part 15
It rotates and drives to cut down trees, etc.

When adjusting the distance between the front handle 29 and the rear handle 31 depending on the working conditions, loosen the bolts 37 and 45, adjust the length of the rear handle 31, and place it in the appropriate position. The rear handle 31 is fixed by tightening the bolts 37 and 45.

According to the present invention, the length of the rear handle can be adjusted according to the physique of the worker and the working situation, so that the machine body can be held appropriately, and the work can be carried out easily.

FIG. 3 shows another embodiment, in which 61 is a hedge trimmer used for trimming garden trees and the like. 63 is an engine, 64 is a fuel tank, and 65 is a working device called a hair clipper in which a blade part (not shown) reciprocated by the engine 63 and a blade part 67 fixed to the engine 63 are overlapped. 69 is a front handle, and 71 is a rear handle, which is equipped with a grip part 70 and a throttle lever 72, and extendable parts 73 and 75, respectively.
are extendably provided in the respective slots 7 and 7.
7, 79 and bolts 81, 83 to adjustably fix the parts.

[Brief explanation of the drawing]

FIG. 1 is a perspective explanatory view of one embodiment of the present invention;
FIG. 2 is a side sectional view of the main part, and FIG. 3 is a plan view of another embodiment. Explanation of the symbols representing the main parts of the drawing, 3...
Main body, 5... Prime mover, 15... Blade portion, 29... Front handle, 31... Rear handle, 48... Grip portion, 49... Throttle lever.

Claims (1)

[Scope of utility model registration request] A blade portion 15 is provided protruding forward of the main body 3 to which the prime mover 5 is attached, and a front handle 2 is provided at the front of the main body 3.
9 and a rear handle 31 at the rear, a throttle lever 49 is provided in close proximity to a grip portion 48 provided on the rear handle 31,
A portable working machine characterized in that the rear handle 31 is provided to be extendable and retractable so as to protrude rearward from the main body 3, and the extendable and retractable length is adjustable.