JPS5930522B2 - Portable power chain saw - Google Patents

Description

[Detailed description of the invention] The present invention relates to a portable moving chain saw.

One of the important tasks of this chain saw is sawing work in forestry.

This workplace requires dangerous work in a noisy environment with poor footing, so cooperation is required to carry out the work safely. Therefore, during collaborative work, it is necessary to notify surrounding workers of work signals and dangers. For example, it may be necessary to signal work procedures to colleagues behind a large tree or notify them of a fallen tree during felling of a large tree.

In this case, there are various ways to give a signal or warning, but a sound signal or warning is more reliable. The present invention focuses on these points and aims to provide a portable movable chain saw equipped with a safe and reliable sound generating device using a saw chain driving engine, with the aim of preventing danger and improving work efficiency. It is something to do.

The configuration of the present invention will be described below with reference to embodiments of the drawings.

FIG. 1 shows a commonly available chain saw 1 equipped with a whistle 4 as a sound generating device at a muffler exhaust port 3 of an engine 2.

This chain saw has a saw chain 5 on the right side and forms a front handle 6 and a rear handle 7. The whistle 4 is arranged with its blowing port facing the upper part of the exhaust port 3, and connected to one end of a push/pull wire 8, so that it can be moved up and down while being guided by a guide 9. In this embodiment, a lever 10 with one end pivoted to the fuselage is connected to the whistle 4, so that when a signal is required, the whistle 4 is lowered and engaged with a stopper 11 to maintain the correct sounding position. . The other end of the wire 8, which normally pulls up the whistle 4, is connected to a sliding operating member 12 provided on the rear handle 7, and when a signal is required, the operating member 12 can be pushed forward with a finger. Therefore, the whistle 4 is pushed by the wire 8 and approaches the exhaust port 3, and the lever 10 or the stopper 11
When it comes into contact with the exhaust gas, it is stopped at a predetermined emitting position and emitted by the exhaust gas discharge force. The tone of the whistle may vary depending on the inner diameter and length of the tubular body, the shape of the mouthpiece, etc., or it may be possible to select an appropriate tone depending on the location where the chainsaw is used or the preference of the operator. In the embodiment shown in FIG. 1, a whistle was provided at the exhaust port, but as shown in FIG.
A whistle 14 may be provided facing the 3rd stage.

This fan has many fins to generate wind, but the first
Similar to the one shown in the figure, the sound can be operated using the wind by moving the whistle closer or closer, or by opening and closing the mouthpiece with a plate member. In this case, the whistle's sounding part is opened to the outside of the aircraft to generate the sound. Furthermore, since the engine has a flywheel magneto as its ignition generator, this current can be used to ring a buzzer or bell.

FIG. 3 shows its basic circuit, in which the electric current from the generator 15 is connected/disconnected by an electric switch 17 disposed in the handle 7, and a sound generating device 16 such as a buzzer is activated. As in the case shown in the figure, a signal or warning sound can be obtained as needed. As described above, according to the structure of the present invention, since the portable power chain saw is equipped with a sound generating device, safety and work efficiency can be improved for dangerous work and collaborative work in forestry, etc. To obtain a portable dynamic engine that is unprecedentedly useful and can be provided at a low price since it does not require any special expensive equipment or the like, and can also be provided as an improved commercially available product. Can be done.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of a portable movable switchboard, FIG. 2 is a simplified diagram showing another sound generating device, and FIG. 3 is a simplified diagram showing another sound generating device. FIG. 2 is an electrical circuit diagram for illustrating the device. 2...Engine, 3...Exhaust port, 4.
...Flute, 6...Front part...Ndol, 7...
... Rear... Handle, 12... Operation member,
13...Cylinder cooling fan, 14...
...whistle, 15...generator, 16...sound generator, 17...switch.

Claims (1)

[Claims] 1. A portable power chainsaw comprising an engine for driving the saw chain, a sound generating device that utilizes the power, exhaust, etc. of the engine, and an operating member of the device provided on the operating handle of the chainsaw.