JP2008106660A - Engine blower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engine blower capable of simplifying structure and effectively removing static electricity. <P>SOLUTION: The engine blower 1 is provided with a fan stored in a volute 3, an engine 2 driving a fan, an air duct 6 communicating to the volute 3, and a static electricity removing line 10 arranged in the air duct 6 having a free end in a tip side and electrically connected to the engine 2 via a conductive line 15 in a base end side. The static electricity removing line 10 is formed out of a line member, and an electric discharge line 14 of a turn up part of the line member is integrally formed and is exposed to an outside in the base end side of the static electricity removing line 10. A terminal 11 for fixation is attached on the turn up part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an engine blower.

  2. Description of the Related Art Conventionally, there is known an engine blower that generates blown air by a fan driven by an engine and performs cleaning or the like with the blown air. In such an engine blower, since the blown air is blown out through the wind pipe, static electricity is generated due to friction between the inner wall of the wind pipe and the blown air, particularly when the air is dry. The wind pipe is charged. Therefore, if a grip provided on the wind pipe is gripped in a charged state, static electricity flows through the human body, making it uncomfortable.

  In order to prevent such a situation, various static elimination structures have been proposed (for example, Patent Documents 1 and 2). The wind pipe is charged positively (+) or negatively (-) depending on the material, but according to Patent Documents 1 and 2, an electrically large-capacity engine and the wind pipe are electrically connected. Since the wind pipe is grounded (grounded) to the engine by connecting to the wind pipe, the wind pipe is neutralized regardless of which is charged. Patent Documents 1 and 2 also disclose that static electricity is discharged by discharging electrons charged in the wind tube.

Japanese Patent Laid-Open No. 3-12496 US Patent Application Publication No. 2005/0039298

  However, in Patent Document 1, in order to discharge negatively charged wind tube electrons into the atmosphere, it is necessary to use an ion tube, or to separate the electric discharge wire arranged in the wind tube from an external discharge wire. There is a problem that the body needs to be connected to each other and the structure is complicated.

  In addition, according to Patent Document 2, the electric discharge wire arranged in the wind pipe is a structure that does not positively contact the inner wall of the wind pipe and is a structure that is stably positioned at the center of the wind pipe. When the jet air flowing through the air is negatively charged, the electrons cannot be taken in easily, and even if it is used to discharge the electrons, the discharge action is effectively performed. There is no possibility.

  The objective of this invention is providing the engine blower which can simplify a structure and can remove static electricity effectively.

  An engine blower according to a first aspect of the present invention includes a fan housed in a volute, an engine that drives the fan, a wind pipe that communicates with the volute, a wind pipe that is disposed in the wind pipe, and a tip end that is a free end. And a discharge wire electrically connected to the engine on the base end side. The discharge wire is formed of a wire member, and the release end of the wire member is released on the base end side of the discharge wire. The electric wire is integrally provided and exposed to the outside, and a fixing terminal is attached to the folded portion.

  An engine blower according to a second aspect of the present invention is the engine blower according to the first aspect, wherein the base end side of the wire removal wire is electrically connected to the engine via a conductive wire different from the wire removal wire. It is characterized by being.

  An engine blower according to a third aspect of the present invention includes a fan housed in a volute, an engine that drives the fan, a wind pipe that communicates with the volute, a wind pipe that is disposed in the wind pipe, and a tip end that is a free end. And a discharge wire electrically connected to the engine via a conductive wire on the base end side, and the conductive wire is formed of a wire member, and the wire member is disposed at the end of the conductive wire. The discharge line formed by the folding is integrally provided and exposed to the outside, and a fixing terminal is attached to the folded portion.

  An engine blower according to a fourth aspect of the present invention is the engine blower according to the second or third aspect, wherein the wind pipe is connected to the volute via a tubular elbow, and the proximal end of the discharge wire The side and the one end side of the conductive wire are fastened together using fastening means for fixing the elbow and the volute to each other.

  In the above, according to the first and third aspects of the present invention, the discharge wire whose tip is a free end is violently blown by the blown air flowing through the wind pipe, collides with the inner wall of the wind pipe, and the wind pipe The static electricity generated in the engine can be reliably grounded to the engine, and can also be discharged from the discharge line (or can receive electrons in the atmosphere), and can be reliably discharged. In addition, since the discharge line is provided integrally with the wire removal and / or the conductive line by folding back one line member, it is not necessary to provide these as separate members or use a neon tube. Can also be simplified.

  Further, particularly when the electric discharge wire is electrically connected to the engine via the conductive wire as in the inventions of the second and third aspects, the conductive wire is adapted to the disassembly of the engine side and the wind pipe side. What is necessary is just to cancel | release the joining between a wire removal and a wire removal, and a handleability can be made favorable.

  Further, according to the invention of claim 4, since the elbow is located approximately in the middle between the wind tube and the engine, even if the wind tube attached to the tip of the elbow is shaken during the operation, the removal wire side is not There is no worry of hindering work because it does not get slacked and caught in other parts or pulled out strongly.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an overall view showing an engine blower 1 of the present embodiment. The engine blower 1 includes an engine 2 that is started by a cranking operation by the recoil starter 1 </ b> A, and a fan (not shown) that is driven by the engine 2.

  The engine 2 is fixed to a resinous volute 3 covering the periphery of the rotating fan by bolting or the like. The volute 3 in which the engine 2 is integrally provided is supported by a support frame 4 made of resin through a mount 4A. In the support frame 4, the part opposite to the engine 2 with the volute 3 as a boundary is a shoulder part 4 </ b> B, and the entire engine blower 1 is structured to be carried by an operator.

  A tubular elbow 5 is connected to the volute 3, and a wind pipe 6 having a bellows portion 6 </ b> A and a straight pipe portion 6 </ b> B is connected to the elbow 5. The tip of the wind pipe 6 is a jet outlet 6 </ b> C, and the jet air generated by the fan is jetted from the jet outlet 6 </ b> C through the volute 3, the elbow 5, and the wind pipe 6. The wind tube 6 is integrally provided with a grip 8 held by an operator.

  In such an engine blower 1, the elbow 5 and the wind pipe 6 are also made of resin, and particularly when the atmosphere is dry, static electricity is generated in the wind pipe 6 due to friction with the blown air passing through the interior thereof. Depending on the material, it may be charged positively or negatively. Hereinafter, such a static electricity elimination structure will be described in detail.

  In FIG. 1, a discharge wire 10 is provided inside the wind tube 6. The removal wire 10 is formed in a ribbon shape by knitting a thin metal wire, the distal end side is a free end, and the proximal end side is drawn to the outside from the fitting portion between the elbow 5 and the wind tube 6. As shown in FIG. 2, the wind tube 6 is fitted so as to cover the outer periphery of the end portion of the elbow 5, and the proximal end side of the wire removal wire 10 is drawn out while being sandwiched between the fitting portions.

  In FIG. 3, a terminal 11 is attached to the proximal end side of the electric discharge wire 10. The elbow 5 is fixed to the outer peripheral portion of the tip of the volute 3 with a bolt 12 and a nut 13, but the terminal 11 is fastened together with a nut 13 screwed into the bolt 12. These bolts 12 and nuts 13 are fastening means according to the present invention.

  At this time, the portion of the terminal 11 through which the bolt 12 is inserted is a U-shaped cutout portion 11A (FIG. 4), and the nut 13 can be loosened even when the removal wire 10 is retrofitted. Thus, the terminal 11 can be easily inserted. That is, when the engine blower 1 is shipped from the factory, it is packed with the wind tube 6 removed from the elbow 5, and when the engine blower 1 is connected to each other after unpacking, the work for retrofitting the wire removal wire 10 can be easily performed. .

  FIG. 4 shows an enlarged cross section of a caulked portion between the electric discharge wire 10 and the terminal 11. The proximal end side of the removal wire 10 is folded back at a predetermined length, and a discharge line 14 is formed by the folded portion. In other words, in the present embodiment, the electric discharge wire 10 and the discharge wire 14 are formed of a single wire member, and each portion is formed by folding the wire member at the caulking portion 11B of the terminal 11. Therefore, the structure can be simplified as compared with the conventional case where the wire removal line and the discharge line are provided separately.

  By the way, in this embodiment, as shown in FIG. 3 again, the fastening means (bolt 12 and nut 13) for fixing the elbow 5 to the volute 3 and the crankcase 2A of the engine 2 are electrically connected by a conductive wire 15. It is connected. The terminal 16 attached to one end of the conductive wire 15 is fastened together with the terminal 11 of the electric discharge wire 10, and the bolt 17 for fixing the engine 2 to the volute 3 is inserted into the terminal 17 attached to the other end side. And are also electrically connected to the removal wire 10. In addition, in the terminals 16 and 17, the portions through which the bolts 7 and 12 are inserted are round holes. This is because the conductive line 15 is unlikely to be retrofitted.

  As described above, the engine blower 1 of the present embodiment includes the conductive wire 15 that electrically connects the electric wires 10 and 14 and the engine 2 in addition to the electric discharge wire 10 and the discharge wire 14. The static electricity generated in 6 can be effectively eliminated.

  In other words, when the wind tube 6 is negatively charged due to the material of the wind tube 6, the removal wire 10 violently struck by the air blown in the wind tube 6 irregularly hits everywhere on the inner wall (see FIG. 2), the free electrons of the wind tube 6 can be reliably taken into the wire removal line 10, and most of the ground is grounded to the engine 2 and a part thereof is seamlessly provided with the wire removal line 10. The discharge line 14 can be discharged well into the atmosphere.

  On the other hand, when the wind tube 6 is positively charged depending on the material, the removal wire 10 also irregularly hits the inner wall of the wind tube 6 so that the electrons from the engine 2 cause the conductive wire 15 and the removal wire 10 to move. It is supplied to every part of the wind pipe 6 through and effectively neutralizes the charging in the wind pipe 6. On the other hand, the discharge line 14 also functions as a power supply line, taking in electrons present in the atmosphere, and the taken-in electrons move to the wind tube 6 side through the discharge wire 10 to promote neutralization. .

The best configuration, method, and the like for carrying out the present invention have been disclosed above, but the present invention is not limited to this. That is, the invention has been illustrated and described with particular reference to certain specific embodiments, but without departing from the spirit and scope of the invention, Various modifications can be made by those skilled in the art in terms of quantity and other detailed configurations.
Therefore, the description limited to the shape, quantity and the like disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such is included in this invention.

In the above-described embodiment, the discharge wire 14 is provided integrally with the wire removal line 10 by folding a single wire member. However, the discharge wire 14 is connected to the end of the conductive wire 15 by folding the single wire member. It may be provided integrally on the side. Moreover, even when the discharge line 14 is provided in both the electric discharge line 10 and the conductive line 15, it is included in the present invention.
In the above embodiment, the proximal end side of the removal wire 10 is electrically connected to the engine 2 via the conductive wire 15. However, the conduction wire 15 is omitted and the proximal end side of the removal wire 10 is directly fixed to the engine 2. May be.

  In the said embodiment, although the electric discharge wire 10 was pulled out from the connection part 6D of the wind tube 6, the whole electric discharge wire 10 may be arrange | positioned in the inside over the wind tube 6 and the elbow 5. FIG. In such a case, inside the elbow 5, the proximal end side of the removal wire 10 and one end side of the conductive wire 15 are connected, and the other end side of the conductive wire 15 is drawn out from an arbitrary position to the outside. The discharge wire 14 is connected to the engine 2 and is integrally provided on the other end side of the conductive wire 15, for example, and is exposed to the outside on the engine 2 side.

  In the above-described embodiment, the fastening means according to the present invention is configured by the bolt 12 and the nut 13. However, when the female screw is engraved on the volute 3 and the volute 3 and the elbow 5 are fixed only by the bolt 12. In this case, the fastening means is constituted only by the bolts 12.

  INDUSTRIAL APPLICABILITY The present invention can be used for a portable engine blower that generates blown air by rotationally driving a fan with an engine.

1 is an overall view showing an engine blower according to an embodiment of the present invention. Sectional drawing which shows a part of engine blower. The perspective view which shows the principal part of an engine blower. Sectional drawing which expands and shows the principal part of an engine blower.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Engine blower, 2 ... Engine, 3 ... Volute, 5 ... Elbow, 6 ... Wind pipe, 10 ... Electric discharge wire, 11, 16, 17 ... Terminal, 12 ... Bolt which is fastening means, 13 ... Nut which is fastening means , 14 ... discharge wires, 15 ... conductive wires.

Claims (4)

With a fan housed in the volute,
An engine for driving the fan;
A wind pipe communicating with the volute;
A discharge wire disposed in the wind pipe and having a distal end side as a free end and a proximal end side electrically connected to the engine;
The removal wire is formed from a wire member, and a discharge wire by folding the wire member is integrally provided on the proximal end side of the removal wire, and is exposed to the outside.
An engine blower characterized in that a fixing terminal is attached to the folded portion. The engine blower according to claim 1, wherein
The engine blower, wherein a base end side of the wire removal wire is electrically connected to the engine via a conductive wire different from the wire removal wire. With a fan housed in the volute,
An engine for driving the fan;
A wind pipe communicating with the volute;
A discharge wire disposed in the wind pipe and having a distal end side as a free end and a proximal end side electrically connected to the engine via a conductive wire;
The conductive wire is formed from a wire member, and at the end portion of the conductive wire, a discharge line by folding the wire member is integrally provided and exposed to the outside.
An engine blower characterized in that a fixing terminal is attached to the folded portion. The engine blower according to claim 2 or 3,
The wind pipe is connected to the volute via a tubular elbow,
The engine blower, wherein a base end side of the wire removal wire and one end side of the conductive wire are fastened together using fastening means for fixing the elbow and the volute to each other.

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