JP2004319297A - Static eliminator of power working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for eliminating static electricity generated in each part of a power working machine, particularly, static electricity of an operating lever part, with a simple structure without needing preparation of a special member exclusive for grounding. <P>SOLUTION: In this static eliminator, the operating lever 25 is conductively connected to a slot cable 7 extended into the operating lever 25 through a conductive material 12. Preferably, the conductive material 12 is led out to the outer surface of the operating lever 25, and a discharge plate 13 is conductively connected to the led conductive material 12. Further, the discharge plate 13 is provided on the grip part 1 of the control lever 25, and the slot cable 7 is the inner cable 7 of a Bowden cable 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a static eliminator for a power working machine such as a power blower and a power sprayer.
[0002]
[Prior art]
The power working machine such as the power blower and the power sprayer is used by being carried by an operator, and is used to drive an engine such as an air-cooled 4-cycle or air-cooled 2-cycle gasoline engine, a fan case of a blower driven by the engine, and a fuel tank. , An air cleaner, a chemical tank, etc., and most of the members other than the prime mover body are made of synthetic resin for weight reduction.
[0003]
As a result, for example, in the case of the power blower, sand and other dust are sucked in during operation, and static electricity is generated by friction between the sand and other dust and the fan case and the like through which the sand and other dust flows. The generated static electricity is accumulated in each part of the work machine, and when an operator comes into contact with each part of the work machine, a strong electric shock may be received.
[0004]
Further, in the power sprayer, similarly to the power blower, due to friction between the granular material discharged from the medicine tank by the blower and a flexible injection tube, a direct injection tube, a curved injection, or the like constituting an injection tube. Static electricity was generated and accumulated in the jet pipe and other parts of the working machine.
[0005]
In order to remove static electricity generated and accumulated in each part of the power working machine as described above, a ground member reaching the ground from the power working machine is suspended (for example, see Patent Document 1). . In addition, static electricity is also discharged into the air (for example, see Patent Document 2).
[0006]
[Patent Document 1]
Japanese Utility Model Publication No. 61-45898
[Patent Document 2]
In the case of Japanese Patent Publication No. 4-37641, it is necessary to prepare a ground member such as a chain, and the ground member hinders the worker's walking during work, which makes the handling troublesome. In some cases, there is a risk that an operator may fall down by stepping on the ground, cut the grounding member by stepping on the grounding member, or damage a main body of the working machine to which the grounding member is connected. Similarly, in the case of Patent Document 2, it is necessary to prepare special components.
[0008]
[Problems to be solved by the invention]
In view of the above circumstances, the present invention does not require the provision of a special grounding member such as a chain as in the related art, and has a simple configuration, so that the static electricity generated in each part of the power working machine, particularly the static electricity of the operation handle section, It is an object of the present invention to provide a static eliminator capable of effectively removing static electricity.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention according to claim 1 is characterized in that an operation handle and a throttle cable extended inside the operation handle are conductively connected via a conductive material.
[0010]
The invention according to claim 1 utilizes the throttle cable as a ground in view of the fact that a steel wire, which is a conductive material, is conventionally used as (an inner cable of) the throttle cable. That is, static electricity generated in each part of the working machine during the work, and particularly accumulated in the operation handle, is guided to the carburetor through the conductive material and the throttle cable and discharged. In addition, the discharge of the static electricity in the carburetor is performed by fuel consumption or the like.
[0011]
According to an embodiment of the present invention as set forth in claim 2, the conductive material according to claim 1 is led out to the outer surface of the operation handle, and a discharge plate is conductively connected to the led-out conductive material. And It is preferable that the discharge plate has as large an area as possible.
[0012]
According to the embodiment of the present invention, among the static electricity generated in each part of the work machine during the work, in particular, the static electricity that reaches the operation handle is collected by the discharge plate, and the static electricity collected by the discharge plate is collected. Is supplied to and discharged from the carburetor via the conductive material and the throttle cable. The discharge is also performed from the discharge plate itself through the body of the worker.
[0013]
In addition, when the area of the discharge plate is increased, static electricity charged on the operation handle is effectively collected, supplied to the carburetor via the conductive material and the throttle cable, and discharged. In addition, it is also emitted from the discharge plate.
[0014]
An embodiment according to a third aspect is characterized in that the discharge plate according to the second aspect is provided on a grip portion of the operation handle. According to the embodiment of the third aspect, the discharge plate is always squeezed by the operator's hand during the operation. Therefore, in addition to the discharge of static electricity from the carburetor via the conductor and the throttle cable, the worker himself functions as a ground, and in particular, the operation handle, and the electrostatic charge in other parts of the work machine are effectively used. Is prevented.
[0015]
An embodiment according to a fourth aspect is characterized in that the throttle cable according to the first aspect is an inner cable of a Bowden cable. That is, conventionally, in general, the operation of the carburetor is performed by connecting the carburetor and the grip portion of the operation handle with the Bowden cable. In other words, the inner cable (steel wire) of the Bowden cable connects the throttle lever of the grip portion to the carburetor, and both ends of an outer tube constituting the Bowden cable are fixed to a working machine side and the inner cable is connected to the inner cable. Has been guided.
[0016]
In the above configuration, only the inner cable is connected to the throttle lever. In this embodiment, the conductive material is brought into contact with the inner cable portion which is pulled out of the outer tube of the Bowden cable to electrically connect the operation handle to the inner cable portion. The cable configuration can be used as is.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a main part of a handle grip portion of a power blower according to an embodiment of the present invention, FIG. 2 is a front view of a main part of FIG. 1 with one of two halves removed, and FIG. It is a perspective view of a power blower as an example of a power working machine.
[0018]
FIG. 3 shows a backpack type power blower P as an example of a power working machine embodying the present invention. The power blower P includes a backpack frame 20, a motor unit 21 composed of an air-cooled two-cycle gasoline engine attached to the frame 20, and a centrifugal blower 22. When the blower 22 is driven by the motor unit 21, the blower 22 Are configured to pressurize the intake air and eject it from the ejection tube 23 to the outside.
[0019]
In the drawing, reference numeral 24 denotes a backing band, and 25 denotes an operation handle. When the operator carries the power blower P with the backing band 24, the injection tube 23 is located on the right side of the operator, and the operation handle 25 Are arranged on the left side of the worker. The operation handle 25 is configured to be gripped by an operator and tilted at an arbitrary angle in the arrow X direction.
[0020]
1 and 2 show an embodiment of the operation handle 25. FIG. First, a tip portion of the operation handle 25 is a grip portion 1 having a split structure, which is a synthetic resin integrally molded product, and the grip portion 1 is provided with a rotary throttle lever 2.
[0021]
The throttle lever 2 is integrally formed so as to protrude from a peripheral surface of a disc-shaped base 3 made of a synthetic resin, and the center of the disc-shaped base 3 is rotatable inside the grip part 1 by a metal screw 4 and a nut 5. Be supported by. In addition, although not shown, the grip portion 1 is provided with an engine stop switch and the like.
[0022]
Further, a Bowden cable 6 is extended from the carburetor 21a of the prime mover unit 21 inside the operation handle 25 and the grip portion 1, and a tip 7a of an inner cable 7 (steel wire) constituting the Bowden cable 6 is connected to the It is connected to an appropriate position of the disc-shaped base 3. In the embodiment shown in the drawings, a columnar stopper 8 is fixed to the distal end portion 7a of the inner cable 7, and the columnar stopper 8 is inserted into a cylindrical locking hole 9 previously provided at an appropriate position on the disk-shaped base 3. Adapted.
[0023]
The distal end 10 a of the outer tube 10 constituting the Bowden cable 6 is held by the grip 1 at a point separated from the disc-shaped base 3. In the embodiment shown in the drawings, the distal end portion 10 a of the outer tube 10 is held in the grip portion 1 by being fitted to a holding portion 11 formed in advance.
[0024]
In the above configuration, at the tip of the Bowden cable 6, the tip 7 a of the inner cable 7 that is not covered by the outer tube 10 forming the Bowden cable 6 is exposed.
[0025]
In the present invention, one end 12a of the conductive material 12 having a moderate elasticity, which is rounded so as not to cause sliding resistance, is lightly brought into contact with the distal end 7a of the inner cable 7 in a pressure contact manner. The other end 12b of the member 12 bent into an L shape is fixed to the operation handle 25 side. That is, the operating handle 25, preferably the grip portion 1 of the operating handle 25, and the throttle cable 7 extended inside the operating handle 25 are conductively connected via the conductive material 12.
[0026]
In the embodiment shown in the drawings, the other end 12b of the conductive material 12 is led out to the outer surface of the operation handle 25, and the led-out conductive material 12 has a disk-shaped discharge plate 13 having a predetermined surface area. Are electrically connected. That is, in one embodiment of the drawings, the other end portion 12b of the conductive material 12 is not extended directly to the outer surface of the operation handle 25 and led out. The other end 12b and the discharge plate 13 on the outer surface of the operation handle 25 are conductively fixed by metal rivets 14.
[0027]
In the above configuration, the conductive material 12 is configured to have a predetermined width in advance. That is, when the throttle lever 2 is operated, the distal end portion 7a of the inner cable 7 is bent and swung at a predetermined angle by the rotation of the disk-shaped base 3 without being pulled and returned straight. (See FIG. 2). Therefore, even when the distal end portion 7a of the inner cable 7 swings, the conductive member 12 always guides the movement of each member appropriately without the related members 3, 7, 8, and 12 coming off from each other. To maintain the connection.
[0028]
According to the above configuration, static electricity generated in the power working machine P during operation and particularly reaching the operation handle portion 1 is guided to the carburetor 21a via the conductive material 12 and the throttle cable 7 and released, and further discharged. The discharge through the plate 13 and the operator himself prevents the operator from being subjected to a strong electric shock.
[0029]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to the static electricity removal apparatus of the power working machine which concerns on this invention, it is not necessary to prepare a special earth-dedicated member etc., such as a chain | chain. Static electricity can be effectively removed.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part of a handle grip portion of a power blower according to an embodiment of the present invention.
FIG. 2 is a front view of a main part of FIG. 1 with one of the half halves removed.
FIG. 3 is a perspective view of a publisher as an example of a power working machine.
[Explanation of symbols]
1 Grip part 6 Bowden cable 7 Throttle cable (Inner cable)
12 Conductive material 13 Discharge plate 25 Operation handle

Claims (4)

A static eliminator for a power working machine, wherein an operation handle (25) and a throttle cable (7) extended inside the operation handle (25) are conductively connected via a conductive material (12). apparatus. 2. The device according to claim 1, wherein the conductive material is led out to an outer surface of the operating handle, and a discharge plate is electrically connected to the led-out conductive material. 3. The static electricity removing device for the power working machine described in the above. The static eliminator of a power working machine according to claim 2, wherein the discharge plate (13) is provided on a grip portion (1) of the operation handle (25). The static eliminator for a power working machine according to claim 1, wherein the throttle cable (7) is an inner cable (7) of a Bowden cable (6).

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