JP2008049650A - Chain saw having illumination - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chain saw by which the felling work at night is safely and efficiently done. <P>SOLUTION: The chain saw has a main body 1 loading an engine as a driving means, and a chain 3 which moves along a specified circulation passage while being guided by a guide bar 2 which is installed on the main body 1. The chain saw is equipped with a generator 13 which is driven by the power of the engine, and illumination means 42 and 27 which are driven by electricity generated by the generator 13. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a chainsaw equipped with an engine.

  When a fallen tree due to a typhoon or the like comes into contact with an overhead line or a distribution line, the contact line or the distribution line may be disconnected due to the contact, and a power failure may occur. In such a case, a tree in contact with an overhead line or the like is cut and removed by an engine chain saw (see, for example, Patent Document 1), and a recovery measure from a power failure is performed.

Trees that are in contact with overhead lines must be removed quickly. When removing trees at night, workers rely on the light from the caplights of the floodlight and helmet. Logging work will be done at
JP 2004-42386 A

  However, when performing a felling operation at a high place where overhead lines and the like pass, there is a case where sufficient brightness cannot be obtained with the light of the projector. Also, the main body of the chainsaw is shaded by the light of the helmet cap light, and the position of the rotating cutting chain cannot be fully confirmed. For this reason, it is difficult to perform the logging operation at night, and there is a disadvantage that the work efficiency is poor.

  A main object of the present invention is to provide a chainsaw capable of performing a nighttime logging operation safely and efficiently.

  Another purpose is to provide a chainsaw suitable not only for night work but also for work such as cutting building materials in the dark, such as in a blackout building, to save lives in an emergency. It is.

  The present invention is a chain saw having a main body on which an engine is mounted as driving means and a chain that is guided by a guide bar provided on the main body and moves along a predetermined circulation path, and is driven by the power of the engine. It is provided with the generator and the illumination means driven with the electric power generated by this generator.

  According to the chain saw of the present invention, the driving force of the engine is transmitted to the chain, and a part thereof is transmitted to the generator to generate power. Then, the electric power generated by the generator is supplied to the illumination means, and the guide bar and the chain are illuminated. Thereby, the worker who performs the felling operation at night can confirm the position and direction of the chain that cuts the tree and the like, and can perform the felling operation safely and efficiently.

  In the chain saw according to the aspect of the invention, it is preferable that the illuminating unit is an illuminating lamp attached to the main body. Such an illumination light illuminates the periphery of the guide bar and the chain, and an operator who performs a felling operation at night can confirm a tree to be cut by the chain and perform the felling operation safely.

  In the chain saw of the present invention, the guide bar is formed in a structure including an optical fiber, and the illuminating unit irradiates light to the optical fiber embedded in the guide bar and a light incident portion of the optical fiber. It is preferable to have a light source. As a result, light traveling and scattering in the optical fiber illuminates the guide bar and the surrounding chain, and workers who perform logging operations at night will check the position and orientation of the guide bar and chain accurately and cut the tree. Work can be done.

  As shown in FIG. 1, a chain saw according to an embodiment includes a main body 1 on which an engine is mounted as a drive source, a guide bar 2 that protrudes from the main body 1, and an endless chain that moves around the guide bar 2 ( And a headlamp 4 at the front portion of the main body 1 on the guide bar 2 side. The main body 1 includes a front handle 5 at a position surrounding the front portion, a rear handle 6 at the rear portion, and a side cover 10 at the side portion.

  FIG. 2 is an exploded view with the side cover 10 removed. As shown in the figure, the main body 1 includes a drive shaft 11 to which a driving force of an engine (not shown) is transmitted, a fixing bolt 12, and a generator 13. The fixing bolt 12 passes through the guide bar 2 and is used to fix the guide bar 2 together with the support plate 14 and a nut (not shown).

  A sprocket 15 is attached to the drive shaft 11, and the driving force of the drive shaft 11 is transmitted to the chain 3 when the sprocket 15 is engaged with a plurality of links of the chain 3. Further, a drive belt 16 is wound around the drive shaft 11, and the drive belt 15 is wound around the pulley 17 of the generator 13 at the opposite position. Thereby, the driving force of the driving shaft 11 is transmitted to the generator 13 via the driving belt 16.

  As shown in FIG. 3, the guide bar 2 is a long and narrow plate-like member composed of a pair of side plates 21 and 22 and a hollow middle plate 23, and a plurality of radially running members are disposed inside the middle plate 23. An optical fiber 24 is built in.

  One end of each of the plurality of optical fibers 24 is aligned at the base position of the guide bar 2 to form a light receiving portion 26, and each optical fiber 24 extends radially inside the guide bar 2 from the light receiving portion 26. Each optical fiber 24 is fixed with the other end desired on the peripheral edge of the intermediate plate.

  A light emitting diode 27 that emits light with the electric power generated by the generator 13 is attached at a position facing the light receiving unit 26, and light emitted from the light emitting diode 27 is guided by light that travels in the optical fiber 24 and is scattered. The entire bar 2 is illuminated. Further, a part of the light traveling in the optical fiber 24 is irradiated from the tip portion opposite to the light receiving portion 26 toward the peripheral edge of the guide bar 2 so that the peripheral edge of the guide bar 2 and the chain 3 are illuminated. It has become.

  Further, the middle plate 23 has a short front end side, and a thin plate-like sprocket 25 that is rotatably supported by the pair of side plates 21 and 22 is attached to a front end portion where the middle plate 23 of the guide bar 2 is not provided. ing. A chain 3 arranged along the outer peripheral edge of the guide bar 2 is hung on the sprocket 25.

  As described above, the chain 3 is hung on the sprocket 15 attached to the drive shaft 11 to which the driving force of the engine is transmitted and the sprocket 25 attached to the tip of the guide bar 2 at the other end. By operating the engine in this state, the chain 3 moves along the outer peripheral edge of the guide bar 2 and can cut a tree or the like.

  As shown in FIG. 2, the headlamp 4 includes a translucent external cover 41 and a plurality of light emitting diodes 42 attached to the inside, and the light emitting diodes 42 are generated by the power generated by the generator 13. The light is emitted, and the light passes through the outer cover 41 to illuminate the chain 2 and the guide bar 3 side.

  Next, the operation of the chain saw of this embodiment will be described.

  The work of cutting a tree in contact with an overhead line or the like is performed using an aerial work vehicle in which a work table is attached to the tip of a boom that can be swung and extended. Specifically, a worker who performs a felling operation on the work table is boarded, and a tree that is in contact with the overhead line is felled using a chainsaw.

  In particular, when performing a felling operation at night, the operator switches the illumination changeover switch 7 shown in FIGS. 1 and 2 to ON. Thus, the power generated by the generator 13 is supplied to the light emitting diode 42 of the headlamp 4 or the light emitting diode 27 facing the light receiving portion 26 of the optical fiber 24 in the guide bar 2.

  At this time, as shown in FIG. 4, the generator 13 is driven by the driving force of the engine to generate an AC voltage, and the AC voltage is converted into a constant DC voltage through the bridge circuit and the stabilization circuit, so that the light emitting diode 27 or the light emitting diode 42. As a result, a constant DC voltage is supplied to the light emitting diode 27 or the light emitting diode 42 regardless of the engine speed.

  Thereby, the periphery of the guide bar 2 and the chain 3 is illuminated by the light of the light emitting diode 42 of the headlamp 4, and an operator who performs logging work at night confirms the tree to be cut by the chain 3 and the like. Logging work can be done. Further, the guide bar 2 and the chain 3 located at the periphery thereof are illuminated by the light that travels through the optical fiber 24 and scatters, and an operator who performs logging work at night changes the position and orientation of the guide bar 2 and the chain 3. Logging work can be done with accurate confirmation.

  According to this embodiment, nighttime logging operations can be performed safely and efficiently, but the present invention is not limited to such use, for example, for cutting operations in a building where a power failure has occurred. Thus, the chainsaw of the present invention can also be used for work in the dark.

  In the present embodiment, the driving force of the engine is always transmitted to the generator, and the light emitting diode as the illumination means is turned on / off via the illumination changeover switch. Only when necessary, the driving force of the engine may be transmitted to the generator to generate power and illuminate. Further, regarding the ON / OFF of the illumination means, the illumination means may be automatically turned on according to the external illuminance, for example, using an optical sensor circuit or the like without using the illumination changeover switch.

  In the present embodiment, the light emitting diode is used as the illumination unit, but the present invention is not limited to this, and an illumination unit such as a lamp (bulb) can be used. Furthermore, the attachment position of the headlamp is not limited to the illustrated form, and may be provided on the side cover, for example.

The perspective view which shows the external appearance of the chainsaw of one Embodiment of this invention. The exploded view which shows the internal structure of the chain saw of FIG. Explanatory drawing which shows the structure of a guide bar. Explanatory drawing which shows the electric power supply means from a generator to a light emitting diode.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Main body, 2 ... Guide bar, 3 ... Chain, 4 ... Headlamp, 13 ... Generator, 24 ... Optical fiber, 26 ... Light-receiving part, 27 ... Light emitting diode (light source).

Claims (3)

In a chainsaw having a main body on which an engine is mounted as a driving means, and a chain that is guided by a guide bar provided on the main body and moves along a predetermined circulation path,
A chain saw comprising: a generator driven by the power of the engine; and illumination means driven by electric power generated by the generator.   The chain saw according to claim 1, wherein the illumination means is a headlamp attached to the main body. The guide bar is formed in a structure containing an optical fiber,
3. The chain saw according to claim 1, wherein the illuminating unit includes an optical fiber built in the guide bar and a light source that irradiates light to a light incident portion of the optical fiber.

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