JP2011244780A - Backpack type engine working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engine working machine that can control a decrease in working efficiency even when working at a dark place or working at nightfall.SOLUTION: The backpack type engine working machine includes: an engine 6 in which a power generator 22 and an output shaft 8 for driving a cutting blade are provided; a battery 24 charged by the power generator 22; a backpack frame 5 for supporting the engine 6 and the battery 24; and an illumination device 7 mounted on the backpack frame 5 for supplying electricity from the power generator 22 or the battery 24.

Description

  The present invention relates to a backpack type engine working machine such as a backpack type brush cutter.

  2. Description of the Related Art Conventionally, there is known a backpack-type working machine in which an engine is mounted on a frame to which a shoulder belt is attached so that an operator can carry a mowing and blowing work on his / her back. The backpack type brush cutter is equipped with an engine serving as a power source for rotating a cutting blade on a backpack frame. The output of the engine is transmitted to the cutting blade via a flexible shaft in the flexible tube and a drive shaft in the operating rod.

JP-A-11-9051

  By the way, the place where the brushing work is performed is often in the dark forest or in the mountains even in the daytime. Therefore, the backpack-type brush cutter described in Patent Document 1 is used when working in the dark or at dusk. Thus, there is a problem that the visibility of the work range is poor and the work efficiency is lowered.

  This invention is made | formed in view of the said subject, and it aims at providing the engine working machine which can suppress the fall of working efficiency at the time of dark work or dusk.

In order to achieve the above object, a backpack engine working machine according to the present invention includes:
An engine comprising a generator and an output shaft for driving the tip tool;
A back frame that supports the engine;
A lighting device attached to the backpack frame and fed by the generator,
It is characterized by that.

The battery further includes a battery supported by the back frame and charged by the generator.
The lighting device may be supplied with power from the battery.

Further, the shoulder frame is attached with a shoulder belt, and extends in a substantially vertical direction when the shoulder belt is in contact with the operator's back, and one end portion of the first shoulder portion that is located on the ground side when the shoulder belt is carried. And a second back portion extending from
The engine is attached to the second backpack;
The lighting device is in the vicinity of a connection portion between the first backpack and the second backpack and is substantially orthogonal to the extending direction of the first backpack and the extending direction of the second backpack. It may be attached to the end of the.

  The lighting device may be attached so as to protrude from the back frame in a direction substantially perpendicular to the extending direction of the first backpack and the extending direction of the second backpack.

  Furthermore, the illumination device may be attached so that the irradiation direction can be changed.

  A fuel sensor that detects the amount of fuel in the fuel tank; and a control device that changes a lighting state of the lighting device when a remaining amount of fuel becomes a predetermined value or less based on an output of the fuel sensor; , May be further provided.

  Further, the control device may blink the lighting device when the remaining amount of fuel becomes a predetermined value or less.

  According to the present invention, since the lighting device powered from the battery is provided on the back frame of the backpack type engine working machine, it is possible to suppress a decrease in work efficiency even when working in the dark or at dusk.

The perspective view which shows the whole backpack type brush cutter which concerns on this invention. The enlarged side view of the back frame part of the backpack type brush cutter of FIG. The front view of FIG. The permeation | transmission perspective view of the fuel tank of the backpack type brush cutter of FIG. FIG. 2 is a control block diagram of the backpack type brush cutter of FIG. 1. The flowchart which shows control of the backpack type brush cutter of FIG. The side view which shows the state in operation | work of the backpack type brush cutter of FIG. FIG. 8 is a top view of FIG. 7. The figure corresponding to FIG. 2 which concerns on the modification of the backpack-type brush cutter which concerns on this invention. The front view of FIG. FIG. 10 is a side view showing the working state of the backpack-type brush cutter in FIG. 9.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, a backpack-type brush cutter (backpack-type engine working machine) 1 includes a back support portion (first back portion) 3 and a back support portion 3 to which a shoulder belt 2 is attached and abuts against the operator's back. An engine supported by a back frame (back carrying part) 5 composed of an extending part (second back carrying part) 4 extending from the lower end in a direction away from the operator's back, and the extending part 4 of the back carrying frame 5 6 and the lighting device 7, a flexible tube 9 having a flexible shaft connected to the output shaft 8 of the engine 6 and a drive shaft connected to the flexible shaft inside, connected to the flexible tube 9 at one end, An operating rod 11 to which a cutting blade (tip tool) 10 is attached is provided at the other end (tip). The operating rod 11 is provided with a splash protection cover 12 that covers the periphery of the cutting blade 10 on the operator side, and a loop handle 13 and a grip 14 that are held by the operator. The grip 14 is provided with a throttle lever 15 that controls the output of the engine 1, a stop switch 16 that stops the engine 1, and a lighting switch 17 that operates the lighting device 7. The operations of the throttle lever 15, stop switch 16, and illumination switch 17 are transmitted to the engine 6 or the illumination device 7 via the flexible cord 18.

  As shown in FIG. 2, the backrest portion 3 of the backpack frame 5 extends in a substantially vertical direction when the backpack is carried on the back, and the extended portion 4 of the backpack frame 5 is below the backrest portion 3 (the lower side in the figure, The back frame 5 has a substantially L-shape when viewed from the side (FIG. 2). The engine 6 supported by the extension 4 of the back frame 5 is accommodated in the fuel tank 20 having a fuel sensor 19 for detecting the amount of fuel, a starter handle 21 for starting the engine 6, and the engine 6. A generator 22 is provided. The fuel tank 20 is mounted above the backpack frame, and the signal cable of the fuel sensor 19 and the fuel tube are connected to the engine. For example, as shown in FIG. 4, the fuel sensor 19 includes a piezoelectric film 119 attached to the bottom of the fuel tank 20, and a voltage signal corresponding to the weight of the fuel (remaining amount of fuel) due to the piezoelectric effect of the piezoelectric film 119. May be configured to perform the output. Also, as shown in FIG. 2 and FIG. 3, the end portion of the backrest frame 5 near the connection portion between the backrest portion 3 and the extension portion 4, and at the position near the left and right waist portions of the operator when carrying the backpack A pair of lighting devices 7 are attached to the left and right (left and right in FIG. 3). The illuminating device 7 has a back support in the width direction of the back frame 5, that is, in the left-right direction in FIG. 3 or in the direction substantially orthogonal to the extending direction of the back pad portion 3 and the extending direction of the extended portion 4. It attaches so that it may protrude from the part 3 and the extension part 4. FIG. The lighting device 7 includes a light emitting unit 71 disposed at the tip and a housing 72 that houses the light emitting unit 71. The illumination device 7 is attached to the back frame 5 via a movable member 23 so that the inclination angle with the ground (horizontal plane) can be changed when the back is carried as shown by an arrow A in FIG. The back frame 5 is provided with a rechargeable battery 24 such as a lithium ion battery that supplies power to the lighting device 7 and a control device 25. In addition, it is good also as a structure which can change the irradiation direction to a desired arbitrary direction not only to change the housing 72 part of the illuminating device 7 to a flexible tube, but to incline the illuminating device 7.

  As shown in FIG. 5, the lighting device 17, the fuel sensor 19, the generator 22, the battery 24, and the lighting device 7 are connected to the control device 25. The lighting switch 17 outputs a signal indicating the on / off state of the lighting switch 17 to the control device 25, and the fuel sensor 19 outputs a signal indicating the amount of fuel in the fuel tank 20 to the control device 25. In addition, when the lighting switch 17 is turned on, the control device 25 supplies the power supplied from the generator 22 or the battery 24 to the lighting device 7 to turn on the lighting device 7. Electric power is supplied to the battery 24 to charge the battery 24. Furthermore, as shown in the flowchart in FIG. 6, the control device 25 detects the state of the illumination switch 17 and the output of the fuel sensor 19 in step S1. In step S2, it is determined whether or not the lighting switch 17 is turned on and the remaining amount of fuel is equal to or less than a predetermined value. If YES in step S2, the process proceeds to step S3 to turn on the light. A certain lighting device 7 blinks for a certain time. If NO, the process returns to step S1. A plurality of light sources that emit different colors are arranged in the light emitting unit 71 of the illuminating device 7, and when the remaining amount of fuel is equal to or less than a predetermined value, the illuminating device 7 is blinked and the luminescent color is changed in step S3. It may be.

  According to the backpack type brush cutter 1 configured in this way, as shown in FIG. 7, when the operator 26 turns on the illumination switch 17 of the brush cutter 1 during the brush cutting operation, the worker 26 near the waist of the worker 26. The illuminating device 7 is turned on, and the light emitted from the illuminating device 7 spreads in the range indicated by the oblique line B in FIG. Further, since a pair of lighting devices 7 are provided on the left and right of the waist of the worker 26, as shown in FIG. 8, the light emitted from the left lighting device 7 spreads in the range indicated by the oblique line C in FIG. The light emitted from the right side illumination device 7 spreads in the range indicated by the oblique line D in FIG. Therefore, the illumination device 7 can reliably irradiate the work space of the cutting blade 10 from the foot of the worker 26. Moreover, since the lighting device 7 is provided in a pair in the left and right so as to protrude in the width direction from the back frame 5 in the vicinity of the connection portion between the backrest portion 3 and the extension portion 4 of the back frame 5, Even during work, it is possible to reliably irradiate the front and lower sides of the worker 26 from the vicinity of the waist of the worker 26. Furthermore, even if the light of one lighting device 7 is blocked, the other lighting device 7 can irradiate the front and lower sides of the worker 26 as shown in FIG. Therefore, it is possible to suppress a reduction in visibility even in a dark place or at dusk, and a reduction in work efficiency can be significantly suppressed. In addition, since the lighting device 7 is powered by the battery 24 and is lit, the lighting device 7 can be used even when the engine 1 is stopped due to, for example, running out of fuel. Furthermore, when the remaining amount of fuel decreases below a predetermined level, the illumination of the lighting device 7 blinks for a certain period of time, so that it becomes possible to recognize that it is necessary to replenish the fuel easily and reliably, and the operator 26 eliminates the need to check the remaining amount of fuel by lowering the carrying frame 5 in an environment with poor visibility, thereby improving workability.

  In addition, the illuminating device 7 is not necessarily restricted to the above-mentioned embodiment. For example, as shown in FIGS. 9 and 10, the lighting device 107 is extended from the back support portion 3 into the back support portion 3 at the end near the connection portion between the back support portion 3 and the extension portion 4 of the carrying frame 5. A pair of accommodating portions 172 extending toward the protruding portion 4 may be provided on the left and right (left and right in FIG. 10), and the light emitting portion 171 may be embedded in the accommodating portion 172. In this case as well, as shown in FIG. 11, when the operator 26 turns on the illumination switch 17 of the brush cutter 1 during the brushing operation, as shown in FIG. The device 107 is turned on, and the light emitted from the illumination device 107 spreads in a range indicated by a hatched line E in FIG. Therefore, as in the case described above, it is possible to reliably irradiate the front and lower sides of the worker 26 from the vicinity of the waist of the worker 26, and even if the light of one lighting device 107 is blocked. The other lighting device 107 can irradiate the front and lower sides of the worker 26. For this reason, even if it is a dark place or dusk, it is suppressed that a visibility is reduced and the fall of work efficiency can be suppressed significantly. In addition, since the lighting device 107 is housed inside the back frame 5, there is no portion protruding from the back frame 5, there is no interference with the lighting device 107 during work, and work efficiency is improved. The appearance of the exterior frame 5 of 1 can be improved.

  The backpack type brush cutter of the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims.

DESCRIPTION OF SYMBOLS 1 Back type brush cutter 3 Back pad part 4 Extension part 5 Back frame 6 Engine 7 Illuminating device 10 Cutting blade 11 Operating rod 17 Illumination switch 19 Fuel sensor 20 Fuel tank 22 Generator 24 Battery 25 Control device

Claims (7)

An engine comprising a generator and an output shaft for driving the tip tool;
A back frame that supports the engine;
A lighting device attached to the backpack frame and fed by the generator,
A backpack-type engine working machine. A battery supported by the back frame and charged by the generator;
The lighting device is powered from the battery,
The backpack type engine working machine according to claim 1 characterized by things. The back frame is attached to a shoulder belt and extends from one end of the first back part that extends in a substantially vertical direction when the back is in contact with the operator's back and the first back part that is located on the ground side when the back is carried. A second back carrying out part,
The engine is attached to the second backpack;
The lighting device is in the vicinity of a connection portion between the first backpack and the second backpack and is substantially orthogonal to the extending direction of the first backpack and the extending direction of the second backpack. Mounted on the end of the
The backpack type engine working machine according to claim 1 or 2, wherein The lighting device is attached so as to protrude from the back frame in a direction substantially orthogonal to the extending direction of the first back portion and the extending direction of the second back portion.
The backpack type engine working machine according to claim 3 characterized by things. The illumination device is attached so that the irradiation direction can be changed,
The backpack type engine working machine according to any one of claims 1 to 4 characterized by things. A fuel sensor for detecting the amount of fuel in the fuel tank;
A control device that changes the lighting state of the lighting device when the remaining amount of fuel becomes a predetermined value or less based on the output of the fuel sensor;
The backpack type engine working machine according to any one of claims 1 to 5, wherein The control device causes the lighting device to blink when the remaining amount of fuel becomes a predetermined value or less.
The backpack type engine working machine according to claim 6 characterized by things.

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