JP6137917B2 - Ejector used for blower equipment - Google Patents

Description

  The present invention relates to an ejector that is attached to a distal end portion of a blower pipe of a blower device and increases a blown air blown from the blower pipe.

  Patent Document 1 discloses an ejector used for a blower device. The ejector used in the blower device is supported by a cylindrical mounting portion that is fitted and fixed to the outer peripheral surface of the tip of the blast tube of the blower device, and a column that is radially provided on the outer peripheral surface of the cylindrical mounting portion. And a wind-increasing tube portion that covers the outer peripheral surface of the front end portion of the blower tube so as to allow ventilation. When air is ejected from the opening at the front end of the blower tube, negative pressure is generated by the passing air inside the wind increase cylinder portion of the ejector, and air is sucked into the wind increase cylinder portion from the intake port at the base end under negative pressure. The air ejected from the front end opening of the wind-increasing tube portion is added with air sucked from the suction port at a negative pressure to the air ejected from the front end opening of the blower tube, and the air volume increases from the air ejected from the front end opening of the blower tube.

Japanese Utility Model Publication No. 63-056720

  In the blower device in which the ejector is attached to the tip of the blower tube of Patent Document 1, the amount of air ejected from the tip opening of the ejector is larger than the amount of air blown from the blower tube. Reduced compared to wind speed. When the blower device with the ejector attached is used for cleaning the fallen leaves, a wide range of dry fallen leaves can be blown away by the air ejected from the tip opening of the ejector. However, since the wind speed of the air ejected from the ejector is lower than the wind speed of the air ejected from the blower tube, the wet fallen leaves stuck to the ground may not be blown away. In this case, it was necessary to remove the ejector from the tip of the blower tube and blow off the fallen leaves stuck to the ground by ejecting air with high wind speed from the blower tube. If the ejector is attached or detached during the cleaning operation using the blower device, the cleaning operation must be interrupted, resulting in a problem that the work efficiency deteriorates. An object of the present invention is to provide an ejector in which the air volume and the wind speed can be adjusted without removing the ejector.

In order to solve the above problems, the present invention is an ejector that is attached to the tip of a blower tube of a blower device and increases the blown air blown from the blower tube, and has an inner diameter larger than the outer diameter of the tip of the blower tube. A wind increasing cylinder portion that covers the outer peripheral surface of the blower tube so as to allow ventilation from the outside, and the inside of the wind increase tube portion extends into the front end portion of the blower tube, and on the inner peripheral surface of the front end portion of the blower tube A plurality of engagement strips that are slidably engaged along the axial direction, and the plurality of engagement strips are slidably engaged along the axial direction on the inner peripheral surface of the distal end portion of the blower pipe. Thus, an ejector for use in a blower device is provided in which the position of the wind-increasing tube portion can be relatively adjusted along the axial direction with respect to the distal end portion of the blower tube.

The ejector used for the blower device configured as described above has a plurality of engagement strips slidably engaged with the inner peripheral surface of the distal end portion of the blower tube along the axial direction, thereby allowing the wind increase tube portion to be By enabling relative position adjustment along the axial direction with respect to the distal end portion of the blower pipe, it was possible to adjust the air volume and the wind speed ejected from the wind increasing tube portion of the ejector.

Also, on the inner circumferential surface of the distal end portion of the air duct to form a plurality of guide grooves in which a plurality of engaging strips extending along the axially slidably engaged, the engagement strip with the guide groove By sliding along, the position of the wind increasing tube portion may be adjusted along the axial direction. Further, an engagement cylinder portion that is slidably engaged along the axial direction is provided on the inner peripheral surface of the distal end portion of the blower tube at the distal end portion of the engagement strip, and the engagement tubular portion is provided at the distal end portion of the blower tube. By sliding along the inner peripheral surface, the position of the wind increase tube portion may be adjusted along the axial direction.

In another embodiment of the ejector used in the blower device configured as described above , instead of the engagement strip, the tip of the blower tube is fitted slidably along the axial direction to the tip of the blower tube. And an extension pipe that adjusts the length of the section, and by sliding the extension pipe along the axial direction, the position of the wind-increasing tube section may be adjusted relative to the tip of the blower pipe.

Further, in another embodiment of the ejector used in the blower device configured as described above, instead of the engagement strip, along the axial direction on the outer peripheral surface of the distal end portion of the hand blower tube to increase wind cylindrical portion position The engaging portion includes an engaging portion that is adjustably engaged, and the engaging portion has a C-shaped portion having a C-shape in a direction orthogonal to the axial direction of the blower tube. the Rukoto the outer peripheral surface was slidably resiliently engaged in the axial direction may be adjustable relative position in the axial direction with respect to the distal end of the blower tube-increasing air cylinder unit.

Moreover, in each embodiment of the ejector used for the blower apparatus comprised as mentioned above, while making it possible to position-adjust a wind increase cylinder part relatively to an axial direction with respect to the front-end | tip part of a blast pipe, It is preferable that a part of the peripheral wall of the tube part be closer to the peripheral wall of the tip part of the blower tube than the other part. From the portion, air with a high wind speed can be ejected, and from a portion other than the portions close to each other, air with an increased air volume can be ejected.

In each embodiment of the ejector used for the blower device configured as described above, the wind increasing cylinder portion can be relatively adjusted along the axial direction with respect to the distal end portion of the blower pipe, and the wind increasing cylinder portion Is formed by bending a flexible plate material so as to cover the outer peripheral surface of the front end portion of the blower tube so as to allow ventilation, and connecting both end portions in the circumferential direction to form a cylindrical shape. It is preferable that the diameter of the cylindrical shape can be adjusted by changing, and in such a case, the air whose air volume and wind speed are changed can be ejected by adjusting the diameter of the wind-increasing cylinder portion.

It is a perspective view of a backpack type blower device using the ejector of the present invention. (A) It is sectional drawing along the axial direction of the ejector of 1st Embodiment, (b) It is the figure seen from the front end side, (c) It is AA sectional drawing. It is sectional drawing along the axial direction when the ejector of 1st Embodiment has been arrange | positioned at the front end side. (A) It is sectional drawing along the axial direction of the ejector of 2nd Embodiment, (b) It is the figure seen from the front end side, (c) It is BB sectional drawing. It is sectional drawing along the axial direction when the ejector of 2nd Embodiment is arrange | positioned at the front end side. It is sectional drawing along the axial direction of the ejector of 3rd Embodiment, (a) is sectional drawing when an ejector is arrange | positioned at the base end side, (b) is a sectional view when the ejector is arrange | positioned at the front end side. (A) It is sectional drawing along the axial direction of the ejector of 4th Embodiment, (b) It is the figure seen from the front end side. In the ejector of 4th Embodiment, it is sectional drawing along the axial direction when an extension pipe is arrange | positioned from the base end side to the front end side. (A) It is sectional drawing along the axial direction of the ejector of 5th Embodiment, (b) It is CC sectional drawing. It is sectional drawing along the axial direction when the ejector of 5th Embodiment is arrange | positioned to the front end side (a), and (b) is arrange | positioned to the base end side. (A) It is sectional drawing along the axial direction of the ejector of 6th Embodiment, (b) It is DD sectional drawing. (A) It is sectional drawing along the axial direction of the ejector of 7th Embodiment, (b) It is EE sectional drawing. It is sectional drawing of the direction orthogonal to the axial direction of the ejector of 8th Embodiment.

  Hereinafter, an embodiment in which an ejector used in a blower device of the present invention is applied to a back-loading blower device will be described with reference to the accompanying drawings. As shown in FIG. 1, the back blower apparatus 10 includes a blower unit 20 in a back frame 11 carried by a worker. The back frame 11 has an L-shape that includes a back rest portion 11a that extends vertically and hits the operator's back, and a pedestal portion 11b that extends rearward from the lower portion of the back rest portion 11a. A pair of shoulder straps 12, 12 are attached to the backrest portion 11 a of the backpack frame 11 for the operator to carry on his back. A support arm 13 that supports the blower pipe 30 is fixed to the right side portion of the backpack frame 11.

  The blower unit 20 ejects air sucked by the rotation of a fan (not shown) driven by the prime mover 21 from the ejection duct 23. The blower unit 20 includes a volute case 22 in which a prime mover 21 is integrally assembled. A fan (not shown) that is rotated by the prime mover 21 is accommodated in the volute case 22. The volute case 22 is integrally provided with an ejection duct 23 that ejects air sucked by a fan, and a blower pipe 30 is connected to the ejection duct 23.

  The blower pipe 30 ejects air ejected from the ejection duct 23 of the blower unit 20 toward the object. The blower pipe 30 includes an elbow part 31 connected to the ejection duct 23 of the blower unit 20, a flexible part 32 composed of a flexible bellows part connected to the tip of the elbow part 31, and a tip of the flexible part 32. It consists of the straight part 33 extended straightly connected.

  The base end portion of the elbow portion 31 is supported by a support arm 13 fixed to the backpack frame 11 so as to be rotatable in the circumferential direction. A grip 34 for gripping the blower tube 30 is provided at the base end portion of the straight portion 33, and a slot lever 35 for operating the output of the prime mover 21 of the blower unit 20 is provided on the grip 34.

  An ejector 40 that increases the amount of air ejected from the blower tube 30 is provided at the tip of the straight portion 33 of the blower tube 30. As shown in FIG. 2, the ejector 40 according to the first embodiment includes a wind increase cylinder portion 41 that covers the outer peripheral surface of the blower pipe 30 so that air can be ventilated from the outside, and a diffuser provided at a tip portion in the wind increase cylinder portion 41. 42 and three engagement strips 44 that extend into the tip of the blower tube 30 in the wind-increasing tube portion 41 and slidably engage with the inner peripheral surface of the tip of the blower tube 30. These are integrally formed of a flexible resin member.

  The wind increasing cylinder portion 41 has an inner diameter larger than the outer diameter of the distal end portion of the blower tube 30 and has a cylindrical shape with both ends opened in the axial direction. The proximal end opening of the wind increasing tube portion 41 is located behind the distal end opening 33a of the air blowing tube 30, and the space between the proximal end opening of the air increasing tube portion 41 and the distal end portion of the air blowing tube 30 is within the air increasing tube portion 41. It serves as an intake port 41b for introducing outside air. Since the air inlet 41b of the wind increasing tube portion 41 is formed between the base end opening and the tip end portion of the blower tube 30, a through hole such as a window for intake air is formed in the peripheral wall of the wind increasing tube portion 41. Less processing is required compared to the formed one. Further, the front end opening of the wind increasing tube portion 41 is located in front of the front end opening 33 a of the blower pipe 30.

  The diffuser 42 is for improving the straightness of the air ejected from the tip opening 33a of the blower tube 30. The diffuser 42 has a trumpet shape in which the front end side is widened, and is concentrically supported by the wind increase cylinder portion 41 by three arm portions 43 provided on the inner peripheral surface of the front end portion of the wind increase cylinder portion 41. Three engaging strips 44 are integrally provided at the base end portion of the diffuser 42 so as to extend from the three locations spaced apart from each other at equal intervals in the circumferential direction to the inside of the distal end portion of the blower pipe 30. The three engagement strips 44 are elastically urged toward the inner peripheral surface of the distal end portion of the blower tube 30, and the engagement strips 44 are axially applied to the inner peripheral surface of the distal end portion of the blower tube 30. A frictional engagement is slidable along. Note that the engagement strips 44 may be extended into the inside of the distal end portion of the blower pipe 30 from two or four or more locations that are spaced apart from each other at equal intervals. When the engaging strip 44 is extended from two locations into the tip of the blower tube 30, the engagement strip 44 is wide in the circumferential direction of the blower tube 30 to increase the area for frictional engagement.

  The operation of the backpack type blower device 10 configured as described above will be described. After starting the prime mover 21 of the blower unit 20, the operator holds the back frame 11, holds the grip 34 of the air duct 30 with the right hand, operates the slot lever 35, and operates the air from the tip opening 33 a of the air duct 30. Erupt.

  When blowing a large amount of air, for example, when blowing dry leaves, as shown in FIG. 3, the wind increasing tube portion 41 of the ejector 40 is moved to the distal end side in the axial direction, and the proximal end of the diffuser 42 The opening is separated from the tip opening 33a of the blower tube 30. A negative pressure is generated when the air blown from the front end opening 33a of the blower tube 30 passes through the wind increase cylinder portion 41, and outside air is introduced into the wind increase cylinder portion 41 from the intake port 41b at the base end. The outside air introduced into the wind increasing tube portion 41 is sucked into the diffuser 42 together with the air ejected from the tip opening 33a of the blower tube 30, and the air ejected from the tip opening of the diffuser 42 is ejected from the tip opening 33a of the blower tube 30. The outside air introduced from the intake port 41b is added to the air thus blown, and the air volume is increased compared to the air ejected from the tip opening 33a of the blower pipe 30.

  On the other hand, when increasing the wind speed of the air, for example, when blowing the wet fallen leaves attached to the ground, as shown in FIG. 2A, the wind-increasing tube portion 41 of the ejector 40 is connected to the base end in the axial direction. The proximal end opening of the diffuser 42 is brought into close contact with the distal end opening 33 a of the blower pipe 30. The air ejected from the tip opening 33 a of the blower tube 30 passes through the diffuser 42 and is ejected from the tip opening of the diffuser 42. At this time, since the distal end opening 33a of the blower tube 30 and the proximal end opening of the diffuser 42 are in close contact with each other, air is not sucked into the wind increasing tube portion 41 from the intake port 41b, and the distal end opening of the blower tube 30 is opened. Air having a high wind speed (high wind pressure) can be ejected from 33a. In addition, it is possible to gradually increase the air volume by gradually separating the base end opening of the diffuser 42 from the position where it is in close contact with the front end opening 33a of the blower pipe 30.

  As described above, in the ejector 40 according to the present embodiment, the position of the wind increasing tube portion 41 can be adjusted along the axial direction with respect to the distal end portion of the blower tube 30, so that the air volume and the wind speed ejected from the ejector 40 can be reduced. Could be adjustable. Further, when it is not necessary to increase the air volume by the ejector 40, it is only necessary to retract the ejector 40 along the axial direction. Therefore, it is not necessary to interrupt the work using the blower device by the attaching / detaching work of the ejector. It was possible to prevent a decrease in the efficiency of the work used. In particular, the blower device 10 of the present embodiment is a backpack type blower device 10 that carries the blower unit 20 on the back of an operator by a backpack frame 11. To attach and remove the ejector to the tip of the blower tube as in the past, stop working with the blower device, lower the back frame carrying the blower unit from the back, and attach and remove the ejector to the tip of the blower tube. The efficiency of work using the blower device has been reduced. By using the ejector 40 used in the blower device 10 of this embodiment, the ejector 40 is fixed so as not to be moved by, for example, lightly hooking the ejector 40 with a foot while the backpack frame 11 is carried on the back. By moving back and forth along the direction, it is possible to adjust the position of the wind increase cylinder portion 41 of the ejector 40 in the axial direction. Thereby, the position of the wind increase cylinder part 41 of the ejector 40 can be adjusted without lowering the back frame 11 from the back, and the efficiency of work using the blower device 10 is not reduced. Moreover, since the ejector 40 is not removed from the front end portion of the blower tube 30, there is no risk of the ejector 40 being lost.

  Next, an ejector according to a second embodiment will be described. The ejector 40A shown in FIGS. 4 and 5 is three (in the axial direction) in which the engagement strip 44A of the ejector 40A is slidably engaged with the inner peripheral surface of the distal end portion of the blower pipe 30 of the blower device 10 ( A plurality of guide grooves 33b are formed. Engaging the engaging strip 44A with the guide groove 33b of the blower tube 30 makes it easier for the ejector 40A to slide in the axial direction of the tip of the blower tube 30 and to easily adjust the position of the ejector 40A in the axial direction. It was. Other than this, the configuration and operational effects of the first embodiment described above are the same.

  Next, an ejector according to a third embodiment will be described. The ejector 40B shown in FIG. 6 eliminates the diffusers of the first and second embodiments, and has four locations (a plurality of locations) spaced from each other at equal intervals in the circumferential direction on the inner peripheral surface of the tip portion of the wind-increasing tube portion 41B. ) Are integrally provided with four (a plurality of) engaging strips 44 </ b> B extending to the inside of the distal end portion of the blower pipe 30. Engagement cylinder portions 45B that are slidably engaged with the inner peripheral surface of the distal end portion of the blower tube 30 are provided at the distal end portions of the four engagement strips 44B.

  As shown in FIGS. 6A and 6B, also in this ejector 40B, the engagement tube portion 45B is increased by sliding along the axial direction on the inner peripheral surface of the distal end portion of the blower tube 30. The position of the wind tube portion 41B can be adjusted along the axial direction of the blower tube 30, and the amount and speed of the air blown from the ejector 40B can be adjusted.

  Next, an ejector according to a fourth embodiment will be described. The ejector 40 </ b> C shown in FIG. 7 is obtained by fixing the wind-increasing tube portion 41 </ b> C to the outer peripheral surface of the distal end portion of the blower tube 30 with an arm portion 46 </ b> C. At this time, the wind-increasing tube portion 41C is fixed so that the position cannot be adjusted along the axial direction with respect to the straight portion 33 of the blower tube 30. The blower tube 30 includes an extension pipe 36 at the tip of the straight portion 33, and the extension tube 36 is slidably fitted to the tip of the straight portion 33 along the axial direction. The extension pipe 36 adjusts the length of the blower pipe 30 in the axial direction by sliding along the axial direction. In the ejector 40 </ b> C, the wind-increasing tube portion 41 </ b> C can be adjusted in position relative to the distal end portion of the blower tube 30 by sliding the extension tube 36 along the axial direction.

  As shown in FIG. 7, when the extension pipe 36 is inserted all the way into the distal end portion of the blower pipe 30, the distal end opening 36a of the extension pipe 36 is farthest rearward (base end side) from the distal end opening 41Ca of the wind-increasing cylinder portion 41C. ) When air is ejected from the front end opening 36a of the extension pipe 36, the air blown from the front end opening 36a of the extension pipe 36 passes through the wind increase cylinder portion 41C, resulting in a negative pressure. Outside air is introduced from the inlet 41Cb at the end. The air ejected from the tip opening 41Ca of the wind-increasing cylinder portion 41C is added with the outside air introduced from the inlet 41Cb to the air ejected from the tip opening 36a of the extension pipe 36, and the air volume is larger than the air ejected from the tip opening 36a of the extension pipe 36. Will increase.

  On the other hand, as shown in FIG. 8, when the extension pipe 36 is pulled out to the front side (tip side), the tip opening 36a of the extension pipe 36 is almost the same position in the axial direction as the tip opening 41Ca of the wind increasing tube portion 41C. It becomes. Even if air is ejected from the distal end opening 36a of the extension pipe 36, the air ejected from the distal end opening 36a of the extension pipe 36 hardly passes through the wind increasing cylinder part 41C and does not become negative pressure, and the wind increasing cylinder part 41C. Outside air is not introduced into the inside from the inlet 41Cb at the base end. As a result, by drawing the extension pipe 36 forward from the tip end of the blower pipe 30, it is possible to eject air with a high wind speed from the tip opening 36 a of the extension pipe 36 without passing through the wind increase cylinder portion 41. As described above, by adjusting the position of the extension pipe 36 along the axial direction, the position of the wind-increasing tube portion 41C can be adjusted relative to the blower pipe 30, and the air in which the air volume and the wind speed are changed is ejected. It becomes possible.

  Next, an ejector according to a fifth embodiment will be described. An ejector 40D shown in FIG. 9 is provided with a wind increase cylinder portion 41D that covers the outer peripheral surface of the blower tube 30 so that ventilation can be performed from the outside, and an axial direction on the outer peripheral surface of the front end portion of the blower tube 30 provided in the wind increase tube portion 41D. , And an engaging portion 47D that can be adjusted in position, and these are integrally formed of a flexible resin member. Moreover, the small diameter part 33c whose diameter is slightly smaller than the other part is formed in the front-end | tip part of the straight part 33 of the blower pipe 30 to which the ejector 40D of this 5th Embodiment is applied, and comprises the small diameter part 33c and another part. A tapered portion 33d whose diameter gradually decreases is formed between the large diameter portion and the large diameter portion. A flange portion 33e is formed at the tip of the small diameter portion 33c.

  The front end opening 41Da of the wind increasing tube portion 41D is located on the front side of the front end opening 33a of the blower tube 30. In addition, the proximal end opening of the wind increasing tube portion 41D is located behind the distal end opening 33a of the air blowing tube 30, and the wind increasing tube portion is between the proximal end opening of the air increasing tube portion 41D and the distal end portion of the air blowing tube 30. An intake port 41 b for introducing outside air into the inside 41 is provided.

  The engaging portion 47D has a C-shaped portion 47Da whose shape in a direction perpendicular to the axial direction of the blower tube 30 is C-shaped, and this C-shaped portion 47Da is increased by an arm portion 47Db extending from the opening edge portion. The wind tube portion 41 is integrally supported. The C-shaped portion 47Da has a slightly smaller diameter than the small diameter portion 33c of the blower tube 30, and is elastically engaged with the outer peripheral surface of the small diameter portion 33c of the blower tube 30 so as to be slidable along the axial direction. The C-shaped portion 47Da is slidably engaged between the flange portion 33e at the distal end of the blower tube 30 and the taper portion 33d on the proximal end side.

  As shown in FIG. 10A, when the wind increasing cylinder portion 41D is disposed at the most front side, the tip opening 41Da of the wind increasing cylinder portion 41D is in front of the tip opening 33a of the blower tube 30, and the wind increasing cylinder portion. The rear end opening of 41D is on the rear side of the front end opening 33a of the blower tube 30. When air is ejected from the tip opening 33a of the blower tube 30, the air blown up from the tip opening 33a of the blower tube 30 passes through the wind-increasing cylinder part 41D and becomes a negative pressure. Outside air is introduced from the inlet 41Db at the end. The air ejected from the tip opening 41Da of the wind-increasing cylinder portion 41D has an air volume that is greater than the air ejected from the tip opening 33a of the blower tube 30 by adding outside air introduced from the intake port 41Db to the air ejected from the tip opening 33a of the blower tube 30. Will increase.

  On the other hand, as shown in FIG. 10B, when the wind increase cylinder portion 41D is arranged at the rearmost side, the tip opening 41Da of the wind increase cylinder portion 41D is in the axial direction with the tip opening 33a of the blower tube 30. It becomes the same position. Even if air is ejected from the front end opening 33a of the blower tube 30, the air blown from the blower tube 30 hardly passes through the wind increase tube part 41C and does not have a negative pressure. Outside air is not introduced from the inlet 41Db at the end. Thereby, the air with a high wind speed can be ejected from the front-end | tip opening 33a of the ventilation pipe | tube 30. FIG. Thus, by adjusting the position of the C-shaped portion 47Da of the engaging portion 47D along the axial direction at the distal end portion of the blower tube 30, the position of the wind increasing tube portion 41D can be adjusted with respect to the blower tube 30, and the air volume It became possible to blow out air with different wind speeds.

  Next, an ejector according to a sixth embodiment will be described. The ejector 40E shown in FIG. 11 is supported on the outer peripheral surface of the front end portion of the blower tube 30 so that the position thereof can be adjusted along the axial direction by using four engagement plate portions 48E provided in the wind increasing cylinder portion 41A. It is. The four (plural) engagement plate portions 48E that support the wind increase cylinder portion 41E are equally spaced in the circumferential direction of the wind increase cylinder portion 41E slightly behind the substantially intermediate portion in the axial direction of the wind increase cylinder portion 41E. Is provided. The engaging plate portion 48E has a plate shape extending in the axial direction and the radial direction. Further, four concave grooves 33f extending in the axial direction are provided on the outer peripheral surface of the blower tube 30 at equal intervals in the circumferential direction. The front end portion of each engagement plate portion 48E is slidably engaged with each concave groove 33f of the blower tube 30 along the axial direction, and the wind increasing tube portion 41E is positioned along the axial direction with the front end portion of the blower tube 30. Adjustably supported. Even in this case, the same effects as those of the above-described embodiments can be obtained. In addition, the engagement plate part extended toward the wind increase cylinder part 41E is provided in the outer peripheral surface of the front-end | tip part of the ventilation pipe 30, and the front-end | tip part of an engagement plate part engages slidably on the internal peripheral surface of the wind increase cylinder part 41E. A concave groove extending in the axial direction may be provided, and the wind-intensifying tube portion 41E may be supported along the engaging plate portion of the blower tube 30 so that the position of the wind increase cylindrical portion can be adjusted in the axial direction.

  Next, an ejector according to a seventh embodiment will be described. In the ejector 40F of the seventh embodiment shown in FIG. 12, the lower part (part) of the peripheral wall of the wind-increasing cylinder part 41F is made closer to the peripheral wall of the tip part of the blower pipe 30 than the other parts, The left and right peripheral walls were separated from the peripheral wall at the tip of the blower tube 30 from above. Further, the position of the ejector 40F can be adjusted along the axial direction at the distal end portion of the blower pipe 30 in the same manner as the fifth embodiment described above.

  In this case, since the air introduced from the intake port 41Fb is small from the lower portion of the wind increasing cylinder portion 41F, high wind pressure air can be ejected, and from other than the lower portion, the air is introduced from the intake port 41Fb. Since there is a lot of air, it is possible to eject air with an increased air volume. By doing in this way, the fallen leaf stuck to the ground can be blown off by the high-speed air jetted from the lower part of the wind-increasing cylinder part 41F, and the air with a large amount of air jetted from the other part of the wind-increasing cylinder part 41F Can blow a wide range of fallen leaves. Except for this configuration and operational effects, it is the same as the above-described embodiments. The ejector 40F of the seventh embodiment is slidably attached along the axial direction to the distal end portion of the blower pipe 30 by the same structure as the engaging portion 47D of the fifth embodiment, but the present invention is limited to this. Instead of this, it may be slidably attached along the axial direction to the distal end portion of the blower pipe 30 by an engagement strip or the like of another embodiment.

  Next, an ejector according to an eighth embodiment will be described. The ejector 40G of the eighth embodiment shown in FIG. 13 uses a flexible plate member for the wind increase cylinder portion 41G, and covers the wind increase cylinder portion 41G so that the outer peripheral surface of the distal end portion of the blower tube 30 can be ventilated. It is bent to connect both ends in the circumferential direction into a cylindrical shape. In this ejector 40G, the diameter of the cylinder can be adjusted by changing the connecting position of both ends in the circumferential direction of the wind increasing cylinder 41G. In addition, the ejector 40G can be adjusted in position along the axial direction at the distal end portion of the blower tube 30 as in the fifth embodiment described above.

  As described above, by making the diameter of the wind increase cylinder portion 41G adjustable, air with the air volume and the wind speed changed can be ejected from the wind increase cylinder portion 41. Except for this configuration and operational effects, it is the same as the above-described embodiments. The ejector 40G of the eighth embodiment is slidably attached along the axial direction to the distal end portion of the blower pipe 30 by the same structure as the engaging portion 47D of the fifth embodiment, but the present invention is limited to this. Instead of this, it may be slidably attached along the axial direction to the distal end portion of the blower pipe 30 by an engagement strip or the like of another embodiment.

  In the above embodiment, the ejector has been described as being attached to the tip of the blower tube of the back blower device, but the present invention is not limited to this, and the ejector is attached to the tip of the blower tube of the handheld blower device. It may be attached.

DESCRIPTION OF SYMBOLS 10 ... Blower apparatus (back-load type blower apparatus), 30 ... Blower pipe, 33b ... Guide groove, 36 ... Extension pipe, 40-40G ... Ejector, 41-41G ... Wind increase cylinder part, 44, 44A, 44B ... Engagement strip One piece, 45B ... engagement cylinder part, 47 ... engagement part, 47Da ... C-shaped part.

Claims (9)

It is an ejector that is attached to the tip of the blower tube of the blower device and increases the blown air blown from the blower tube,
A wind increasing cylinder portion having an inner diameter larger than an outer diameter of a tip portion of the air duct, and covering an outer peripheral surface of the air duct so as to allow ventilation from the outside;
A plurality of engagement strips extending inside the tip of the blower tube within the wind-increasing cylinder and slidably engaged with the inner peripheral surface of the tip of the blower tube along the axial direction; With
The plurality of engagement strips are slidably engaged with the inner peripheral surface of the distal end portion of the blower tube along the axial direction, so that the wind-increasing tube portion is aligned with the distal end portion of the blower tube. An ejector for use in a blower device, characterized in that the position can be relatively adjusted along the direction. The ejector according to claim 1,
An ejector used for a blower device, wherein a plurality of guide grooves extending along an axial direction in which the plurality of engagement strips are slidably engaged are formed on an inner peripheral surface of a tip portion of the blower pipe. . The ejector according to claim 1,
An ejector used for a blower device, wherein an engagement tube portion that is slidably engaged along an axial direction is provided on an inner peripheral surface of a distal end portion of the blower pipe at a distal end portion of the engagement strip. . It is an ejector that is attached to the tip of the blower tube of the blower device and increases the blown air blown from the blower tube,
A wind increasing cylinder portion having an inner diameter larger than an outer diameter of a tip portion of the air duct, and covering an outer peripheral surface of the air duct so as to allow ventilation from the outside;
An extension pipe that slidably fits along the axial direction at the tip of the blower pipe and adjusts the length of the tip of the blower pipe,
An ejector for use in a blower device, wherein the position of the wind-increasing tube portion can be adjusted relative to the distal end portion of the blower tube by sliding the extension tube along the axial direction. It is an ejector that is attached to the tip of the blower tube of the blower device and increases the blown air blown from the blower tube,
A wind increasing cylinder portion having an inner diameter larger than an outer diameter of a tip portion of the air duct, and covering an outer peripheral surface of the air duct so as to allow ventilation from the outside;
An engagement portion that engages with the outer peripheral surface of the distal end portion of the blast tube in the wind increase tube portion so as to be position adjustable along the axial direction;
The engaging portion has a C-shaped portion having a C-shape in a direction orthogonal to the axial direction of the blower tube, and the C-shaped portion is slid along the axial direction on the outer peripheral surface of the distal end portion of the blower tube. An ejector for use in a blower device characterized in that the wind increasing tube portion can be adjusted relative to the front end portion of the blower tube along the axial direction by being elastically engaged freely. . In the ejector as described in any one of Claims 1-5,
An ejector for use in a blower device, characterized in that a part of the peripheral wall of the wind-increasing tube part is brought closer to the peripheral wall of the tip part of the blower pipe than the other part. In the ejector as described in any one of Claims 1-6,
The wind-increasing tube portion is formed by bending a flexible plate material so as to cover the outer peripheral surface of the front end portion of the blower tube so as to allow ventilation, and connecting both end portions in the circumferential direction to form a cylindrical shape. An ejector for use in a blower device, wherein the diameter of the cylindrical shape can be adjusted by changing the connection position in the circumferential direction. It is an ejector that is attached to the tip of the blower tube of the blower device and increases the blown air blown from the blower tube,
It has an inner diameter larger than the outer diameter of the tip of the blower pipe, and includes a wind-increasing cylinder part that covers the outer peripheral surface of the blower pipe from the outside so as to allow ventilation.
The position of the wind-increasing tube portion can be adjusted relatively along the axial direction with respect to the tip portion of the blower pipe, and
An ejector for use in a blower device, characterized in that a part of the peripheral wall of the wind-increasing tube part is brought closer to the peripheral wall of the tip part of the blower pipe than the other part. It is an ejector that is attached to the tip of the blower tube of the blower device and increases the blown air blown from the blower tube,
It has an inner diameter larger than the outer diameter of the tip of the blower pipe, and includes a wind-increasing cylinder part that covers the outer peripheral surface of the blower pipe from the outside so as to allow ventilation.
The position of the wind-increasing tube portion can be adjusted relatively along the axial direction with respect to the tip portion of the blower pipe, and
The wind-increasing tube portion is formed by bending a flexible plate material so as to cover the outer peripheral surface of the front end portion of the blower tube so as to allow ventilation, and connecting both end portions in the circumferential direction to form a cylindrical shape. An ejector for use in a blower device, wherein the diameter of the cylindrical shape can be adjusted by changing the connection position in the circumferential direction.

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