JPH0533121B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to improvements in chain saws used primarily for felling wood and the like.

BACKGROUND OF THE INVENTION An engine-equipped or electric chain saw is provided with an oil tank within the machine body for supplying lubricating oil to a saw chain that circulates along the periphery of a guide bar. In addition, a chainsaw with an engine is provided with a fuel tank in addition to the oil tank, and it is inevitable that the machine body will become larger due to the built-in tank.

Problems to be Solved by the Invention Even in the case of a small chain saw, the above fuel tank and oil tank each have a capacity of 0.7,
0.3, which meant that the machine was larger and heavier, requiring more effort to transport and operate.Therefore, there was a desire to develop a chain saw that was easier to use, smaller, and lighter.

Means for Solving the Problems Accordingly, the present invention provides a chain saw characterized in that a hollow portion of a handle that is gripped when operating the chain saw is configured as a lubricating oil or fuel tank.

Effects As described above, the present invention uses the hollow part of the handle as a lubricating oil or fuel tank, so the aircraft body can be made smaller by the size of the tank compared to the conventional case where a separate tank was provided. It is possible to reduce the weight and eliminate the above-mentioned conventional drawbacks.

Embodiment The embodiment shown in the drawings is an example in which the hollow part of the front handle of a chain saw is configured as a lubricating oil supply tank using the present invention, and the present invention will be described below with respect to this embodiment.

In the figure, F is the body of the chainsaw, 1 is a guide bar extending forward from one side of the front of the machine F,
2 is a saw chain that circulates along the periphery of the guide bar 1; 3 is a saw chain with one end fixed to one side of the front part of the fuselage F, and the other end of which is curved upwardly as shown in Fig. 2; A front handle is supported on the upper surface, 4 is a hollow part of the handle 3, and 5 is attached to the tip of a rubber-coated traction coil spring 6 (not shown) inserted into the hollow part 4 from the other end. The oil supply tank 8 formed in the hollow portion 4 by the plunger 7 is a hose coupler type oil supply port provided at the upper part of the front handle 3 so as to communicate with the oil supply tank 5. This oil filler port 8
From there, an oil pump 9 as schematically shown in FIG.
Press in the lubricating oil using the Reference numeral 10 denotes a lubricating rubber hose having one end connected to a discharge hole 11 adjacent to the lubricating port 8 and the other end connected to a lubricating device 12 configured as shown in FIG. The refueling device 12 includes a needle valve 13, and is provided inside the fuselage F by extending an opening/closing operation lever 14 connected to the valve 13 outside the fuselage F to enable operation from the outside. By making the guide bar 1
A conventionally known oil supply hole 17 provided at the base end of the
It is designed to open and close.

Reference numeral 15 denotes a rear handle extending from the rear of the machine body F, and by providing a refueling port and a discharge hole in the hollow part 16 in the same manner as in the case of the front handle 3, it is possible to refuel a chain saw with an engine. Sometimes used for tanks.

In this chain saw constructed as described above, when lubricating oil is pressurized into the oil filler port 8 of the oil tank 5 of the front handle 3, the lubricating oil is supplied at a pressure maintained by the expanded coil spring 6 and the plunger 7. It can be held in the tank 5, and the oil supply device 12
By this operation, an appropriate amount of lubricating oil can be supplied to the saw chain 2 from the oil supply hole 17 of the guide bar 1.

Effects of the Invention As described above, according to the present invention, in which the hollow part of the chain saw handle is configured as a lubricating oil or fuel tank, the size of the machine is increased by the amount that the handle also serves as the tank. In addition to being smaller and lighter, the handle that operates the chain saw is filled with liquid, which absorbs the vibrations of the machine that previously caused white wax and transmits them to the hand. It also has the effect of reducing vibration.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view showing an embodiment of the present invention, Fig. 2 is a partially cutaway front view of the same as above, Fig. 3 is a partially cutaway enlarged elevational view of the oil supply system, and Fig. 4 is an implementation example. It is a schematic diagram of an oil pump for lubricating used in an example. F... fuselage, 1... guide bar, 2... saw chain, 3... front handle, 4... hollow part, 5...
... Oil supply tank, 6 ... Coil spring, 7 ... Plunger, 8 ... Oil filler port, 9 ... Oil pump, 10
...Refueling rubber hose, 11...Drain hole, 12...
Oil supply device, 13... Needle valve, 14... Opening/closing operation lever, 15... Rear handle, 16... Hollow part, 17... Oil supply hole.

Claims (1)

[Claims] 1. A chain saw, characterized in that the hollow part of the handle that is gripped when operating the chain saw is configured as a lubricating oil or fuel tank.