JP2021195756A - Fluid nozzle and blasting work machine - Google Patents

Abstract

To provide a fluid nozzle capable of simultaneously and reliably adjusting an air volume, wind speed and wind direction of a discharge jet.SOLUTION: A fluid nozzle 11 includes a guide shutter 15 disposed in an outlet opening 14a of a nozzle body 14. The guide shutter 15 includes: a windward side edge 19 extending along the inner surface of the nozzle body 14: and a wind direction guide surface 21 extending from the windward side edge 19 to the leeward side. The guide shutter 15 can be oscillated and displaced between an inactive posture P1, in which the wind direction guide surface 21 extends along the axis X of the nozzle body 14, and a working posture P2, in which the windward side edge 19 is close to or in contact with the inner surface of the nozzle body 14 and the wind direction guide surface 21 partially closes the outlet opening 14a.SELECTED DRAWING: Figure 2

Description

The present invention relates to a fluid nozzle, and more particularly to a fluid nozzle suitable for use in blow-off work, blow-off work, etc. of fallen leaves and the like. The present invention also relates to a blower working machine having a fluid nozzle.

A portable blower work machine called a power blower is suitable for use in blow-off work, blow-off work, etc. of fallen leaves and the like.

In this type of blower work machine, depending on the conditions of use and the place of use, when a discharge jet with a relatively large air volume is required, and when a strong discharge jet with a relatively high wind speed is required. There is. For example, in the case of blowing a large amount of dried fallen leaves scattered over a wide area, a jet flow discharged in a large amount from a large outlet is suitable. On the other hand, in the case of removing dense and moist fallen leaves accumulated in the gutter, a jet jet discharged at high speed from a narrow outlet is more suitable. Therefore, it is convenient to be able to appropriately adjust the air volume and speed of the jet jet discharged from the jet pipe during the work.

In the following Patent Document 1, a pressurized air control nozzle in which a control body is rotatably or movably mounted in the vicinity of a discharge port (see the scope of claims for utility model registration (1) in Patent Document 1). Is posted. According to Patent Document 1, this pressurized wind adjusting nozzle can easily change the blown air volume, wind direction, wind pressure, etc. as necessary by appropriately changing the opening cross-sectional area or opening direction of the discharge port by the adjusting body. (Patent Document 1 specification, page 1, line 18 to page 2, line 2).

Patent Document 1 exemplifies an embodiment in which the regulator is swingably mounted in the vicinity of the discharge port in a state of being close to the inner wall (see claim (2) for utility model registration in Patent Document 1). There is. This embodiment is shown in FIGS. 4 and 5 of Patent Document 1. Then, according to this embodiment, is a "husband adjuster people via a support shaft a ₂ by setting a desired position, it is possible easily change the air volume and wind direction from the discharge port e _2" (Patent Document 1 specification, page 6, line 1 to line 4).

Microfilm of Jitsugyo No. 60-124049 (Jitsukaisho No. 62-34198)

Certainly, in FIGS. 4 and 5 of Patent Document 1, the wind direction of the discharge jet may be adjusted by changing the direction of the regulator. However, even if the direction of the regulator is changed, a large change in the air volume cannot be expected, and therefore, it cannot be said that the air volume and the wind speed can be reliably adjusted.

Further, the ones in FIGS. 4 and 5 of Patent Document 1 are suitable for the work of peeling off the wet leaves stuck to the ground by a discharge jet because the wind direction can be changed only in the lateral direction of the laterally spreading jet head. No.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a fluid jet tube and a blower working machine capable of simultaneously and surely adjusting the air volume, wind speed and wind direction of a discharge jet. The present invention also seeks to provide a blower work machine suitable for the work of peeling off wet fallen leaves stuck to the ground.

In order to solve the above problems, the fluid nozzle according to the present invention includes a jet pipe main body having an outlet opening, a guide shutter disposed in the outlet opening, and an operation unit for controlling the guide shutter. The guide shutter is provided with a wind-upper edge extending along the inner surface of the nozzle body and a wind direction guide surface extending from the wind-upper edge to the leeward side. Further, the guide shutter has an inactive posture in which the wind direction guide surface extends along the axis of the injection tube body by driving the operation unit, and the wind upper end edge is the inner surface of the injection tube body. It is characterized in that it can swing and displace with an action posture in which the outlet opening is partially closed by the wind direction guide surface and is in close proximity to or in contact with the wind direction guide surface (claim 1).

According to the fluid nozzle of the present invention, when the guide shutter is in the non-acting posture, the outlet opening of the nozzle body is fully open. Therefore, the jet to be discharged has the maximum air volume, the minimum wind speed, and the wind direction is in the axial direction of the nozzle body. On the other hand, when the guide shutter is in the working posture, the outlet opening of the injection tube main body is partially closed by the guide shutter. Therefore, the jet to be discharged has the minimum air volume and the maximum wind speed. In addition, when the guide shutter is in the working posture, the jet flow flowing in the nozzle body is guided in the extending direction of the wind direction guide surface. Therefore, by driving the operation unit to swing and displace the guide shutter between the non-acting posture and the working posture, the air volume, the wind speed, and the wind direction of the discharged jet can be adjusted simultaneously and surely.

As a preferred embodiment, when the injection tube main body has a constricted shape having a constricted portion at the tip portion, the outlet opening is formed by the constricted portion, and the guide shutter is in the non-acting posture, the said. The outlet opening may be viewed from the front so that the wind direction guide surface is hidden by the narrowed portion (claim 2).

The blower working machine according to the present invention is a machine that supports the fluid injection pipe, the blower that blows air to the fluid injection pipe, the prime mover that drives the blower, and the blower and the prime mover, and is held by an operator. The remote control unit is provided with a frame and a remote control unit for remotely driving the operation unit, and the remote control unit is arranged at a position within reach of an operator while holding the machine frame. (Claim 3).

According to the blower working machine of the present invention, the operator can swing and displace the guide shutter by operating the remote control unit while performing the blower work. Therefore, the air volume, wind speed, and wind direction of the jet jet discharged from the fluid injection pipe can be adjusted at the same time during the air blowing operation, and the workability is improved.

As a preferred embodiment, the wind direction is obtained by displacing the guide shutter to the working posture while the operator holds the fluid nozzle so that the outlet opening diagonally faces the ground. The fluid jet may be included in the blower work machine so that the guide surface is close to horizontal (claim 4). By doing so, it is possible to discharge a high-speed jet from the outlet opening in a direction close to horizontal while the operator takes a natural blowing work posture. Therefore, the worker can peel off the wet leaves stuck to the ground in a comfortable working posture.

It is a schematic perspective view of the blower work machine which concerns on one Embodiment of this invention. It is a vertical sectional side view of the tip portion (front end portion) of the fluid nozzle in FIG. 1. 2 is a schematic perspective view of the fluid injection tube, where FIG. 2A shows a state in which the guide shutter is in an inactive posture, and FIG. 2B shows a state in which the guide shutter is in an working posture. 2 is a cross-sectional view showing a preferred mode of use of the fluid jet of FIG. 2, where FIG. 2A shows a state in which the guide shutter is in an inactive posture, and FIG. 2B shows a state in which the guide shutter is in a working posture. It is a left side view of the tip portion (front end portion) of the fluid nozzle in FIG. 1. It also includes an explanatory diagram of the interlocking connection relationship between the hand side operation unit, the operation force transmission member, and the front side operation unit. It is a graph which shows the relationship between the air volume and the wind speed when the guide shutter is displaced between the non-acting posture and the working posture. It is the schematic perspective view of the blower work machine which shows another example of the arrangement position of the hand side operation part. It is explanatory drawing which shows the other embodiment of the combination of a guide shutter and a nozzle body. (A) is a perspective view of an example of a combination of a semicircular guide shutter and a cylindrical injection tube main body, and (b) to (d) are a flat plate-shaped guide shutter and an injection tube having a quadrangular outlet opening. It is a perspective view of the example of the combination of the main body, and (c) and (d) are sectional views which show another example of the position of the support shaft of the guide shutter in the thing of (b).

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

The fluid nozzle according to the present invention is suitable for application to a portable or portable blower working machine. Specific examples thereof include a backpack type blower work machine and a handheld type blower work machine. Here, a backpack-type blower working machine will be described as an example.

The blower work machine 1 according to the embodiment of the present invention shown in FIG. 1 is a work machine suitable for a worker to perform blow-off work, blow-off work, etc. of fallen leaves while carrying the machine body 2 on his / her back. ..

The blower work machine 1 of FIG. 1 is provided with a backpack-type machine frame (backpack frame) 3, and the blower 4 and the motor 5 and the like constituting the machine 2 are mounted on the backpack frame 3. The prime mover 5 is a drive source for the blower 4, and is, for example, an internal combustion engine 5a such as a small air-cooled two-cycle engine. A fuel tank 6 for supplying fuel to the internal combustion engine 5a is also mounted on the machine frame 3. Instead of the internal combustion engine 5a, an electric motor may be adopted as the prime mover 5. In this case, instead of the fuel tank 6, a battery as a motor drive power source is mounted on the machine frame 3.

The blower 4 includes a fan case 7 having an outlet 7a. An L-shaped bent elbow pipe 8 is connected to the outlet 7a, and the elbow pipe 8 is connected to the flexible bellows hose 9 and the peripheral joint pipe 10 via an elbow pipe 10 according to the present invention. The fluid injection pipe 11 according to the embodiment is connected. As a result, the airflow created by the blower 4 is discharged from the tip (front end) of the fluid injection pipe 11.

The handle 12 is fixed on the fluid injection pipe 11. The operator carrying the machine frame 3 on his back grips the handle 12 with one hand (right hand) and blows air while controlling the direction and position of the fluid injection pipe 11. At the tip (upper end) of the handle 12, an output operation member 13 such as a trigger type for controlling the output of the prime mover 5 is arranged. The operator controls the output of the prime mover 5 by driving the output operating member 13 with a finger while holding the handle 12.

The fluid nozzle 11 has a cylindrical nozzle body 14 having an outlet opening 14a at its tip (front end), a guide shutter 15 disposed in the outlet opening 14a, and a front operation for controlling the guide shutter 15. A unit 16 is provided. The guide shutter 15 is mounted in the injection tube main body 14 so as to be swing-displaceable.

As will be described in detail later, the guide shutter 15 swings and displaces between the non-acting posture and the acting posture by driving the front operation unit 16. As a result, the guide shutter 15 changes the opening area of the outlet opening 14a and changes the direction of the jet flow discharged from the outlet opening 14a. Therefore, by driving the front operation unit 16 to change the posture of the guide shutter 15, the air volume, wind speed, and wind direction of the discharged jet can be adjusted at the same time. By operating the hand-side operation unit 25 arranged at hand, the operator can remotely drive the front-side operation unit 16 via the Bowden cable 26 as an operation force transmission member.

The guide shutter 15 shown in FIG. 2 is a cylindrical member having a slightly smaller diameter than the injection tube main body 14, and has a shape having an oblique notch 17 in an upper upstream portion. The guide shutter 15 is pivotally supported by the support shafts 18L and 18R at two facing locations so as to be vertically swingable with respect to the injection tube main body 14. As a result, the guide shutter 15 can be oscillated and displaced between the inactive posture P1 shown by the solid line in FIG. 2 and the working posture P2 shown by the virtual line in FIG. The notch 17 of the guide shutter 15 is for preventing the jet flow flowing from the inside of the injection tube main body 14 toward the outlet opening 14a from being blocked in the working posture P2 in which the guide shutter 15 is tilted to the upper side of the blower air. Is.

The guide shutter 15 is located at a lower position from the windward edge 19 extending along the inner surface of the nozzle body 14, the leeward edge 20 extending along the inner surface of the nozzle body 14, and the windward edge 19. A wind direction guide surface 21 extending to the leeward edge 20 is provided. When the guide shutter 15 is in the non-acting posture P1, the wind direction guide surface 21 extends along the axis X of the injection tube main body 14. When the guide shutter 15 shifts from the non-acting posture P1 to the working posture P2, the windward edge 19 is close to or in contact with the inner surface of the injection tube main body 14, and the wind direction guide surface 21 partially opens the outlet opening 14a. close up. When the guide shutter 15 is in the working posture P2, the wind direction guide surface 21 of the guide shutter 15 extends in a direction intersecting the axis X of the injection tube main body 14.

As shown in FIGS. 2 and 3A, when the guide shutter 15 is in the non-acting posture P1, the outlet opening 14a of the injection tube main body 14 is in the fully open state. Therefore, the jet to be discharged has the maximum air volume, the minimum wind speed, and the wind direction is in the axial direction of the nozzle body. On the other hand, when the guide shutter 15 is in the working posture P2, the lower portion of the outlet opening 14a of the injection tube main body 14 is closed by the guide shutter 15 as shown in FIGS. 2 and 3B. That is, the opening area of the outlet opening 14a becomes smaller. Therefore, the jet to be discharged has the minimum air volume and the maximum wind speed. In addition, when the guide shutter 15 is in the working posture P2, the jet flow flowing in the injection tube main body 14 is directed from the windward side to the leeward side in the extending direction of the wind direction guide surface 21 (in the example of FIGS. 2 and 3B). And diagonally upward).

In the example of FIG. 2, the injection tube main body 14 has a narrowed shape having a narrowed portion 22 at the tip end portion, and the outlet opening 14a is formed by the narrowed portion 22. When the guide shutter 15 is in the non-acting posture P1, the wind direction guide surface 21 is hidden behind the narrowed portion 22 when the outlet opening 14a is viewed from the front (left side in FIG. 2). There is a gap C between the lower surface of the guide shutter 15 and the inner surface of the injection tube main body 14, and the presence of this gap allows the swing displacement of the guide shutter 15 from the non-acting posture P1 to the working posture P2. Become.

As a modification of the guide shutter 15 of FIG. 2, a guide shutter having a semicircular cross section may be used, in which the portion above the support shafts 18L and 18R of the guide shutter 15 of FIG. 2 is omitted.

A preferred mode of use of the fluid nozzle 11 of FIG. 2 will be described with reference to FIG. When performing the fallen leaf blowing operation using the blower work machine 1 of FIG. 1, the operator holds the fluid injection pipe 11 so that the outlet opening 14a of the injection pipe main body 14 diagonally faces the ground G. As shown in FIG. 4A, when the guide shutter 15 is in the non-action posture P1, a jet flow F1 having a large air volume is discharged from the fully opened outlet opening 14a in the axial X direction of the injection tube main body 14. This jet F1 diagonally hits the ground G and advances while spreading in a fan shape. Therefore, the mode of use of FIG. 4A is suitable, for example, when blowing dry fallen leaves scattered in a large amount over a wide area.

It is assumed that during the blowing operation in the usage mode of FIG. 4A, a dense moist fallen leaf accumulated in a gutter or a wet fallen leaf stuck to the ground G is encountered. In this case, as shown in FIG. 4B, the operator displaces the guide shutter 15 to the working posture P2. As a result, the lower portion of the outlet opening 14a is closed by the guide shutter 15, so that the air volume decreases while the wind speed increases. In addition, the wind direction of the jet F2 discharged from the outlet opening 14a is close to horizontal. The jet F2 discharged from the outlet opening 14a at a high speed in a direction close to horizontal enters between the ground G and the wet fallen leaves and contributes to the peeling off of the wet fallen leaves. Moreover, since the operator can discharge the high-speed jet F2 from the outlet opening 14a in a direction close to horizontal in a natural blowing work posture in which the fluid jet 11 is held diagonally downward, the wet and fallen leaves that are stuck can be easily discharged. It can be peeled off in a comfortable working posture. It has a feeling of use like a bent rocket nozzle as a replacement part with the tip bent upward.

As shown in FIG. 1, the front operation unit 16 arranged at the tip of the fluid injection pipe 11 can be remotely controlled by the hand side operation unit 25 as the remote control unit arranged on the hand side of the operator. It is said that. The hand side operation unit 25 and the front side operation unit 16 are connected to each other by a Bowden cable 26 as an operation force transmission member. When the hand side operation unit 25 is driven by the operator, the front side operation unit 16 is driven via the Bowden cable 26, and the guide shutter 15 is oscillated and displaced in the injection tube main body 14.

As shown in FIG. 5, the front operation unit 16 includes a front operation lever 27 as an operation member. The front operating lever 27 is fixed to one of the two support shafts 18L and 18R of the guide shutter 15 (18L in the illustrated example) outside the injection tube main body 14. A wire end receiving portion 28 is formed at the tip of the front operating lever 27. The tip side wire end 24 of the inner wire 29 constituting the Bowden cable 26 is fitted into the wire end receiving portion 28. The front operating lever 27 is constantly urged by a spring (not shown) so as to return to the original position (position corresponding to the guide shutter 15 of the non-acting posture P1) shown in FIG.

The outer tube fixture 30 is fixed on the nozzle body 14. The front end 31a of the outer tube 31 constituting the Bowden cable 26 is fixed to the outer tube fixture 30 together with the inner wire 29. If the front operation unit 16 is covered with a cover (not shown) including the area around the outer tube fixture 30, a collision occurs during ventilation work, storage in a warehouse, or transportation on a vehicle carrier. It is suitable because it can prevent damage due to.

As shown in FIG. 5, the hand side operation unit 25 includes a mounting frame 32, and the hand side rotating body 33 is provided on the mounting frame 32. A support shaft 34 is fixed on the mounting frame 32, and a hand-side rotating body 33 is arranged on the support shaft 34 so as to be rotatable forward and backward. A wire groove 35 in the circumferential direction and a wire end receiving portion 36 are formed on the outer periphery of the hand-side rotating body 33. The hand side wire end 37 of the inner wire 29 is fitted into the wire end receiving portion 36, and the inner wire 29 is received in the wire groove 35. A hand-side operating lever 38 as an operating member is fixed to the hand-side rotating body 33.

An outer tube fixture 39 is arranged on the mounting frame 32. The hand side end portion 31b of the outer tube 31 is fixed to the outer tube fixture 39.

In FIG. 5, when the operator rotates the hand side operation lever 38 in the clockwise direction, the Bowden cable 26 transmits the driving force, and the front side operation lever 27 is rotationally driven in the clockwise direction. As a result, as shown by the virtual line in FIG. 5, the guide shutter 15 is oscillated in the injection tube main body 14 in the clockwise direction from the non-acting posture P1 to the working posture P2. As a result, as already described with reference to FIGS. 2 and 3, the air volume, wind speed, and wind direction of the jet jet discharged from the outlet opening 14a are simultaneously changed by the guide shutter 15. When the operator releases the hand-side operating lever 38, the front-side operating lever 27 returns to the original position shown in FIG. 5 by the spring, and the guide shutter 15 returns to the original non-acting posture P1.

Although not limited, the hand side operation unit 25 moves the hand side operation lever 38 to an arbitrary operation position selected by interposing a friction mechanism between the support shaft 34 and the hand side rotating body 33. It may be configured so that it can be stopped. By doing so, even if the operator releases the hand side operation lever 38, the hand side operation lever 38 stays at the selected operation position, so that the operator can operate the output operation member 13 or the fluid injection pipe 11. You can concentrate on the orientation operation and workability is improved.

Further, the hand-side operation unit 25 may be configured to be operable stepwise by adopting a click stop mechanism or the like, but is preferably configured to be operable steplessly. By doing so, the opening area and the wind direction of the outlet opening 14a can be adjusted steplessly, so that the combination of the air volume, the wind speed, and the wind direction of the discharged jet can be finely adjusted.

FIG. 6 shows the air volume (CFM: cubic feet per minute) and the air velocity obtained when the guide shutter 15 is oscillated and displaced to change the area of the outlet opening 14a in the blower working machine of FIG. It is a graph which showed the relationship with (mph: milles per hour: mile hourly).

In FIG. 6, the point A shows a combination of the air volume and the wind speed of the discharge jet when the guide shutter 15 is in the non-acting posture P1 (the area of the outlet opening 14a is the maximum). When the guide shutter 15 was oscillated and displaced toward the working posture P2 from the state of the point A to gradually narrow the outlet opening 14a, the data of the points B to F were obtained. The point F is a combination of the air volume and the wind speed of the discharge jet when the guide shutter 15 is in the working posture P2 (the area of the outlet opening 14a is the minimum).

From the distribution of points A to F in FIG. 6, the relationship between the air volume and the wind speed of the discharged jet when the area of the outlet opening 14a is changed steplessly is approximately shown by a straight line L. The numerical values in FIG. 6 are examples under certain conditions. However, regardless of the area of the outlet opening 14a when fully opened, the output of the prime mover 5, the performance of the blower 4, etc., when the guide shutter 15 is oscillated and displaced to change the area of the outlet opening 14a. It is presumed that the relationship between the air volume and the wind speed of the discharge jet can be approximately represented by a straight line as shown in FIG. Therefore, it is considered that the combination of the air volume and the wind speed on a straight line can be easily realized by swinging and displacing the guide shutter 15.

The hand-side operation unit 25 is arranged at a position within reach of the operator while carrying the machine frame 3 on his back. Therefore, the operator operates the hand side operation unit 25 with his / her free hand while performing the ventilation work by operating the output operation member 13 and the direction of the fluid injection pipe 11, so that the guide shutter 15 can be operated. Can be freely rocket-displaced. During the blowing work, the air volume, wind speed and wind direction of the discharged jet can be adjusted at the same time according to the situation at the work site, and the workability is improved.

In the example of FIG. 1, the hand side operating portion 25 is arranged near the base portion of the handle 12. In this case, the operator can operate the hand side operation unit 25 with his / her free left hand while holding the handle 12 with his / her right hand and operating the output operation member 13 of the prime mover 5.

As another example of the arrangement position of the hand side operation unit 25, the position on the left side of the lower part of the front part of the machine frame 3 in FIG. 1 (the position opposite to the elbow pipe 8) can be mentioned. In this case, the operator can operate the hand side operation unit 25 by turning the free left hand behind the waist while holding the handle 12 and operating the fluid injection pipe 11 with the right hand.

As yet another example of the arrangement position of the hand side operation unit 25, the one shown in FIG. 7 can be mentioned. In FIG. 7, the same components as those in FIG. 1 are designated by the same reference numerals as those in FIG. Also in the example of FIG. 7, the fluid injection pipe 11 is provided with a handle 12 gripped by an operator, and the handle 12 is provided with an output operating member 13 for controlling the output of the prime mover 5. ..

In the blower working machine 50 of FIG. 7, for example, as described in Japanese Patent Application Laid-Open No. 10-299503, an arm 51 capable of swinging up and down is arranged on the left side of the lower part of the front part of the machine frame 3. .. Then, the hand side operation portion 25 is arranged in the vicinity of the grip portion 52 on the tip end side of the arm 51. The operator can operate the hand side operation unit 25 with the finger of the left hand that grips the grip unit 52.

In addition, in FIG. 7, the output operation member 13 on the handle 12 may be arranged on the arm 51 in the same manner as the hand side operation unit 25.

As another embodiment, the specific combination of the guide shutter 15 and the injection tube main body 14 may be as follows.

In the example of FIG. 8A, a guide shutter 40 having a semicircular cross section is adopted, and the central portion of the windward edge 41 of the guide shutter 40 is oscillatedly displaced by the support shaft 42 to the cylindrical injection tube main body 43. It is possible to support it.

In the examples of FIGS. 8 (b) to 8 (d), a flat plate-shaped guide shutter 45 is pivotally supported by a support shaft 46 in a quadrangular injection tube main body 44 with an outlet opening 44a so as to be swing-displaceable. In this case, the position of the support shaft 46 may be near the windward edge 47 of the guide shutter 45 as shown in FIG. 8 (b), or leeward of the guide shutter 45 as shown in FIG. 8 (c). It may be near the side edge 48, or as an intermediate position between them as shown in FIG. 8 (d).

In any of the examples of FIG. 8, the guide shutters 40 and 45 extend from the windward edge to the leeward side and the windward edge 41 and 47 extending along the inner surface of the injection tube main bodies 43 and 44. In the inactive posture P1 of the guide shutters 40 and 45, the wind direction guide surface extends along the axis of the injection tube main bodies 43 and 44, and in the action posture P2 of the guide shutter, the windward edge is provided. It goes without saying that 41, 47 are close to or in contact with the inner surface of the injection tube main body, and the outlet openings of the injection tube main bodies 43, 44 are partially closed by the wind direction guide surface.

Although the embodiments of the present invention have been described in detail above, the specific configuration is not limited to these embodiments, and the present invention may be changed in design within a range not deviating from the gist of the present invention. Included in the invention. Further, the above-described embodiments can be combined by diverting the technologies of each other as long as there is no particular contradiction or problem in the purpose and configuration thereof.

1 Blower work machine 3 Airframe frame 4 Blower 5 Motor 11 Fluid injection tube 14 Injection tube body 14a Outlet opening 15 Guide shutter 16 Operation unit (front operation unit)
19 Windward edge 20 Windward edge 21 Wind direction guide surface 22 Constriction 25 Remote control unit (hand side operation unit)
P1 Non-action posture P2 Action posture X Axial line of the nozzle body

Claims (4)

A fluid injection tube including a injection tube main body having an outlet opening, a guide shutter disposed in the outlet opening, and an operation unit for controlling the guide shutter, and the guide shutter is the injection. A wind direction guide surface extending along the inner surface of the tube body and a wind direction guide surface extending from the wind side edge to the leeward side are provided, and the guide shutter is driven by the operation unit. As a result, the wind direction guide surface extends along the axis of the nozzle body, and the wind upper edge is close to or in contact with the inner surface of the nozzle body, and the outlet opening is portiond by the wind direction guide surface. A fluid nozzle that is rocket-displaceable with and from a closed working posture. When the injection tube body has a constricted shape having a constricted portion at the tip thereof, the outlet opening is formed by the constricted portion, and the guide shutter is in the non-acting posture, the outlet opening is viewed from the front. The fluid injection pipe according to claim 1, wherein the wind direction guide surface is hidden in the narrowed portion. The fluid injection pipe according to claim 1 or 2, a blower that blows air to the fluid injection pipe, a prime mover that drives the blower, and an airframe frame that supports the blower and the prime mover and is held by an operator. A blower working machine comprising a remote control unit for remotely driving the operation unit, and disposing the remote control unit at a position within reach of an operator while holding the machine frame. While the operator holds the fluid nozzle so that the outlet opening diagonally faces the ground, the guide shutter is displaced to the working posture so that the wind direction guide surface becomes close to horizontal. The blower work machine according to claim 3, wherein the fluid injection pipe is included in the blower work machine.

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