JP2009091914A - Suction pipe and portable blower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce suction pressure down to desired pressure without adjusting the output of a blower when utilizing the portable blower as a suction device. <P>SOLUTION: This suction pipe 1 is mounted in the suction port of the power driven portable blower. It comprises a suction guide part 1A for sucking a sucked object from a front end 1t and guiding it to the suction port, and a mounted part 1B detachably mounted in the suction port. The suction guide part 1A has a bore area larger than the bore area of the suction port, and its large bore section L1 having an almost constant bore area in the axial direction is formed on the front end side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a suction pipe attached to a power-driven portable blower and a portable blower to which the suction pipe is attached.

  2. Description of the Related Art A portable blower that collects and cleans roads and the like by using suction pressure and blow pressure of a blower that is driven by power is known. FIG. 1 is an explanatory view showing an example in which a conventional portable blower is used as a suction device (see Patent Document 1 below; FIG. 1 (a) is an external view, and FIG. 1 (b) is a front view of a fan case). ).

  In this conventional example, the main body J1 is integrally constituted by a prime mover J11 for driving a fan J10, a starting recoil starter J12, a fuel tank J13, a fan case J14, and the like, and a suction pipe J2 is connected to an intake port J14A of the fan case J14. Are detachably connected, and a blowing pipe J3 is detachably connected to the blowing port J14B of the fan case J14. And the dust bag J4 which has appropriate air permeability is attached to the blowing end of the blowing pipe J3. In addition, handles J15 and J16 held by the operator are provided on the main body J1. In addition, in the air inlet J14A of the fan case J14, a cutter J5 that is mounted on the drive shaft of the fan J10 and rotates together with the fan J10 is provided.

  According to such a portable blower, the fan J10 is driven when the prime mover J11 is started, and suction objects such as fallen leaves, wood pieces, and dust are attracted to the fan case J14 via the suction pipe J2 by the suction pressure generated by the fan J10. It is sucked into the intake port J14A. Therefore, the sucked object to be sucked is pulverized by the cutter J5 that rotates together with the fan J10, and the pulverized sucked object is sent to the outlet J14B through the air intake path in the fan case J14, and is passed through the outlet pipe J3. The dust is collected in the dust bag J4.

Such a portable blower is used exclusively as a suction device as shown in the figure, is used exclusively as a blower that uses a blowing pressure by attaching a blowing nozzle to a blowing port, or a suction pipe or a blowing pipe, Make the blowing nozzle detachable and use the suction pressure as shown in the figure, and if using the blowing pressure, remove the suction pipe, attach the safety cover to the air intake, and attach the air blowing nozzle to the air outlet. There is a dual-purpose device that can adopt the form.
JP 2000-179497 A

  When a portable blower is used as a suction device to collect, for example, fallen leaves on the road, only a light dust such as fallen leaves needs to be sucked, so that a large suction pressure is not necessarily required. If the suction pressure is high, pebbles, metal pieces, etc. are sucked in, and in the centrifugal blower in which the suction object passes through the fan case, the fan and the fan case are damaged.

  However, portable blowers are set to operate at the rated output of the prime mover, and generally the suction pressure cannot be adjusted, so the output is set to a low suction pressure that does not suck in pebbles or metal pieces. In this case, the versatility for other applications requiring a large suction pressure is lacking.

  Also, in the above-mentioned combined device, when using it as a blower, a large air flow is required to increase the work efficiency, so the output setting is increased, and if this is used as a suction device, a large suction pressure is generated. As a result, the problem of sucking pebbles, metal pieces, etc. occurs.

  An object of the present invention is to deal with such a problem. That is, when the portable blower is used as a suction device, the suction pressure can be reduced to a desired pressure without adjusting the output of the blower, and the blower can be prevented from being damaged by sucking pebbles, etc. By reducing the suction pressure according to the above, the versatility of the suction device can be increased, and in the power-type portable blower that combines suction and blowing, the output setting is set to a sufficient height suitable for blowing, When used as a suction device, it is an object of the present invention to realize suction at a pressure that does not suck pebbles or the like.

  In order to achieve such an object, the present invention is an improvement of a suction pipe attached to an intake port of a portable blower, and includes at least the configurations according to the following independent claims.

  [Claim 1] A suction pipe attached to an intake port of a power-type portable blower, wherein the suction pipe sucks an object to be sucked from the tip and guides it to the intake port, and is detachably attached to the intake port. A suction pipe, wherein the suction guide portion has a suction force reducing portion on a distal end side.

  [Claim 5] A power-type portable blower that combines suction and ventilation, and includes an intake port to which a suction pipe is detachably attached and a suction pipe to be attached to the intake port. The suction guide portion (1A) includes a suction guide portion (1A) for sucking an object to be sucked from the tip (1t) and guiding the suction to the intake port, and a mounting portion (1B) detachably attached to the intake port. Has a suction force reducing portion formed by a large-diameter section (L1) having an aperture area larger than that of the intake port and having a substantially constant aperture area in the axial direction on the tip side. .

  According to such a feature, when the portable blower is used as a suction device, the suction pressure can be reduced to a desired pressure without adjusting the output of the blower by using the suction pipe having the features described above. The blower can be prevented from being damaged by sucking pebbles or the like. In addition, by selectively adopting the suction pipe having the above-described features, the suction pressure can be reduced according to the application, and the versatility of the suction device can be enhanced. Moreover, in a portable blower that combines suction and air blowing, the output setting is set to a height that is suitable for air blowing, and when used as a suction device, suction at a pressure that does not suck pebbles or the like can be realized. .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 2 is an explanatory view showing a configuration example of a suction pipe according to an embodiment of the present invention. A suction pipe 1 according to an embodiment of the present invention is attached to an intake port of a power-driven portable blower, and sucks and sucks an object to be sucked from a tip 1t to the intake port. And a mounting portion 1B that is detachably mounted to the intake port.

  And as one feature, suction guide part 1A has a suction power reduction part in the tip side. By attaching the suction pipe 1 to the portable blower by this suction force reducing portion, the suction pressure at the tip portion of the suction pipe 1 can be reduced even when the output setting of the portable blower is considerably high. The problem of sucking up heavy objects such as pebbles can be solved.

  As an example of the suction force reducing portion, as shown in the example shown in the drawing, a large-diameter section L1 having an aperture area larger than that of the intake port and having a substantially constant aperture area in the axial direction is formed on the tip 1t side. . The large-diameter section L1 is preferably ½ or more, preferably 2/3 or more of the entire length of the suction guide portion 1A, in order to reliably eliminate the suction of heavy objects. The cross-sectional shape of the large-diameter section L1 may be an ellipse or a polygon other than a circle, but the cross-sectional area needs to be substantially constant along the axial direction.

  According to such a feature, since the large-diameter section L1 having a large caliber area with respect to the caliber area of the intake port of the blower is provided at a predetermined length on the tip side, the suction pressure there can be reduced. On the other hand, when the caliber area of the large caliber section L1 is gradually expanded, effective suction pressure reduction does not occur. By making the aperture area of the portion where the aperture is enlarged substantially constant in the axial direction, the suction pressure at the suction port of the tip 1t can be reduced to a predetermined value according to the increased aperture area.

  When such a suction pipe 1 is attached to the intake port of a portable blower, even if it is a portable blower that cannot adjust the output, the suction pressure can be effectively reduced, for example when collecting dust on the road. By reducing the suction pressure so that lightweight objects such as fallen leaves are sucked but heavy objects such as pebbles and metal pieces are not sucked in, it is possible to prevent the problem of sucking pebbles and the like and damaging the blower.

  In addition, if the output of the blower is set to be high to some extent and a high suction pressure is required, a suction pipe having a diameter equivalent to the diameter of the air intake of the blower without the large diameter section L1 is selected and attached, When a high suction pressure is not required, the versatility of the blower that cannot adjust the output can be improved by selecting and mounting the suction pipe 1 having the large-diameter section L1.

  Furthermore, when this suction pipe 1 is employed for a blower that serves as both a blower and a suction device, the output of the blower is increased so that high workability can be obtained when used as a blower. It can be set, and when used as a suction device, it is possible to reduce the suction pressure to a predetermined pressure by mounting the suction pipe 1 and realize a specification that does not suck gravity objects such as pebbles and metal pieces. it can. Therefore, the pressure setting required for both the blower and the suction device can be realized only by adopting the suction pipe 1 without adjusting the output.

  Another feature of the suction pipe 1 according to the embodiment of the present invention is that the above-described suction guide portion 1A has a small diameter having a diameter area equivalent to that of the intake port during the period from the mounting portion 1B to the above-described large-diameter section L1. That is, it includes a section L2 and a connecting section L3 that continuously expands from the small-diameter section L2 toward the large-diameter section L1.

  According to this, the flow of the suction object can be smoothed by the presence of the connecting section L3, and a lightweight object such as a fallen leaf can be reliably sent to the intake port. Therefore, even when the suction pressure is lowered by the large-diameter section L1, it is possible to reliably suck the necessary lightweight object and to ensure good suction workability.

  In addition, another feature of the suction pipe 1 according to the embodiment of the present invention is that the mounting portion described above has a connection mechanism that is detachably connected to an intake port of a portable blower that combines suction and ventilation. That is. In the example shown in the drawing, a bayonet groove 1B1 is formed in the mounting portion 1B, and this can be detachably connected by engaging with a bayonet claw provided in the air inlet of the blower. According to this, the suction pipe 1 can be attached to and detached from the portable blower that is used for both suction and blowing, and the desired ability can be exhibited by each of the suction and blowing.

  In addition, by adopting the rotary connection mechanism, the connection torque of the rotary connection mechanism can be obtained with a small force by holding the large-diameter section L1 by hand, and the operation at the time of connection is simplified. It can be carried out. At this time, as shown in the figure, it is possible to further facilitate the connection operation by providing a non-slip portion 1p on the outer surface of the large diameter section L1.

  The other details of the suction pipe 1 according to the illustrated embodiment will be described. A notch 1ts is partially formed at the tip 1p. By providing the notch part 1ts in this way, even when the notch part 1ts is brought into contact with the ground, a part other than the notch part 1ts of the tip 1t is opened. The suction operation can be performed without blocking the tip 1t of the suction pipe 1.

  In addition, by providing the protrusion 1s on the outer surface of the small diameter section L2, when the suction pipe 1 is attached by the hand of the mounting portion 1B, the connection operation can be performed with the protrusion 1s with good workability.

  As an example of the present invention, when the total length (L1 + L2 + L3) of the suction guide portion 1A is 862 cm, the large diameter section L1 is 620 cm, the small diameter section L2 is 157 cm, and the connecting section L3 is 85 cm. By attaching the suction pipe 1 to the intake port, even when the dual-purpose device is used as a suction device, dust collection work such as fallen leaves can be performed effectively without sucking heavy objects such as pebbles.

  FIG. 3 is an explanatory view showing another embodiment of the present invention (the same parts as those of the above-described embodiment are denoted by the same reference numerals and redundant description is omitted). In this embodiment, the suction pipe 1 can be divided into a plurality of pieces. In the example shown in the drawing, a divided connection portion A for dividing the whole into three parts is formed. The split connection portion A may employ other connection forms besides the screw type as illustrated. At this time, it is preferable that the airtightness at the divided connection portion can be sufficiently ensured and the inner surface of the suction pipe 1 has no step. Thus, by making the suction pipe 1 separable, there is an advantage that it is easy to secure an accommodation space when carrying the long suction pipe 1.

  When the suction pipe 1 is attached to the conventional portable blower having the suction port J14A to which the suction pipe 1 according to the embodiment of the present invention shown in FIGS. 2 and 3 is detachably attached, both suction and ventilation are used. A portable blower can be used effectively. That is, this portable blower is set to output so that it can exhibit sufficient capability during blowing, and at the time of suction, the above-described suction pipe 1 is attached to the suction port J14A, so that the tip of the suction pipe 1 is A state where the suction pressure is lowered can be realized. According to this, it is possible to realize a highly safe suction operation and an efficient air blowing operation without adjusting the output in the combined suction and air blowing machine.

It is explanatory drawing of a prior art. It is explanatory drawing of the suction pipe which concerns on embodiment of this invention. It is explanatory drawing of the suction pipe which concerns on other embodiment of this invention.

Explanation of symbols

1: suction pipe, 1A: suction guide part, 1B: mounting part, 1t: tip L1: large diameter section, L2: small diameter section, L3: connecting section

Claims (5)

A suction pipe (1) attached to an air inlet in a power portable blower,
A suction guide part (1A) for sucking an object to be sucked from the tip (1t) and guiding it to the intake port; and a mounting part (1B) detachably attached to the intake port,
The suction guide portion (1A) has a suction force reducing portion on a tip side thereof.   2. The suction force reducing portion is formed by a large-diameter section (L1) having an aperture area larger than the aperture area of the intake port and having a substantially constant aperture area in the axial direction. Suction pipe.   The suction guide portion (1A) includes a small-diameter section (L2) having a caliber area equivalent to the intake port and the small-diameter section (L1) between the mounting section (1B) and the large-diameter section (L1). The suction pipe according to claim 2, further comprising a connecting section (L3) that continuously expands from L2) toward the large-diameter section (L1).   The said mounting part (1B) has a connection mechanism connected detachably with respect to the inlet port of the portable air blower which combines suction and ventilation. Suction pipe. A power-driven portable blower that combines suction and ventilation,
An intake port to which the suction pipe is detachably attached and a suction pipe to be attached to the intake port;
The suction pipe includes a suction guide portion (1A) for sucking an object to be sucked from a tip (1t) and guiding the suction to the intake port, and a mounting portion (1B) detachably attached to the intake port. The guide portion (1A) has a suction force reduction portion formed by a large diameter section (L1) having a diameter area larger than the diameter area of the intake port and a substantially constant diameter area in the axial direction on the tip side. A portable blower.

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