WO2008044314A1

WO2008044314A1 - Blower

Info

Publication number: WO2008044314A1
Application number: PCT/JP2006/320477
Authority: WO
Inventors: Keigo Egawa
Original assignee: Shindaiwa Corporation
Priority date: 2006-10-13
Filing date: 2006-10-13
Publication date: 2008-04-17
Also published as: US20100086412A1

Abstract

A blower (1) having a fan (20) placed in a casing (10), a drive device (30) for rotating the fan (20), a dust protection cover (60) for covering an intake opening (11) of the casing (10), and a drive stop mechanism (70) for stopping the drive device (30). The drive stop mechanism (70) has a pressing lever (72) for pressing a pressure sensor (71) by being pressed by that projection (65b) of the dust protection cover (60) which is inserted in an installation hole (12) in the casing (10) and also has a control section (73) for stopping the drive device (30) when pressing force exerted on the pressure sensor (71) by the pressing lever (72) decreases. Because the fan (20) automatically stops rotating when the dust protection cover (60) is removed from the intake opening (11), safety when the intake opening (11) is exposed outward can be enhanced.

Description

Blower

Technical field

[0001] The present invention relates to a blower that blows away objects such as dead leaves and twigs accumulated on the ground and cleans them, and sucks and cleans dust.

Background art

[0002] As a blower for blowing away and cleaning objects such as dead leaves and twigs accumulated on the ground, a blower fan provided in a casing, an engine for driving the blower fan to rotate, and a blower There is a blower provided with a blower duct for discharging an air flow generated by a blower fan to the outside.

[0003] In such a blower, a grip portion is formed in the casing, and an operator can carry the blower with the grip portion. Then, the operator can blow away objects such as dead leaves and twigs and clean them by discharging a high-speed air flow toward the ground from the blower outlet of the blower pipe connected to the air duct.

[0004] In addition, the blower casing is formed with an intake port for taking outside air into the casing, and when the blower fan is rotated, the outside air sucked into the intake loca casing is rotated. The fan creates a high-speed airflow.

Here, in the blower having the above-described configuration, for example, as shown in Japanese Patent Laid-Open No. 2005-163765, a cylindrical vacuum pipe is attached to the intake port, and a net-like dust collecting bag is attached to the air duct. As a result, the suction pipe dust in the vacuum pipe can be sucked and collected in the dust bag. In this way, the blower can be used as a vacuum cleaner.

[0006] Since a dust-proof cover for preventing the inhalation of foreign substances is covered at the intake port of the blower, when attaching a vacuum pipe to the suction port, remove the dust-proof cover to expose the intake port to the outside. There is a need. At this time, if the blower fan rotates in the casing, there is a problem that the blower must be handled with great care. Disclosure of the invention

[0007] The present inventor who should deal with the problems of the prior art described above has advanced research and development and has come up with the present invention. That is, it is possible to provide a blower that can automatically stop the rotation of the blower fan when the dust cover is removed from the intake port and can improve safety when the intake port is exposed to the outside. It is one side of the present invention.

More specifically, a blower according to one aspect of the present invention includes an air feed fan provided in a casing, a drive device that rotationally drives the blower fan, and an air flow generated by the rotating blower fan. A blower comprising: a blower duct for discharging the air to the outside; a dust-proof cover covered by an air inlet formed in the casing; and a drive stop mechanism for stopping the drive device. The projection force provided on the cover is inserted into the mounting hole formed in the casing, so that the dust cover is attached to the casing. The drive stop mechanism includes a pressure sensor provided on the casing and one end of the pressure sensor. The other end is disposed in the mounting hole, and the other end is pressed by the protrusion inserted into the mounting hole, so that one end presses the detection portion of the pressure sensor. When pressure is acting on the pressure lever and pressure sensor detector, the drive unit is set to a driveable state, and the pressure acting on the pressure sensor detector is reduced. And a control unit that sets the drive device to a stop state.

[0009] With this configuration, when the dust cover is removed from the air inlet, if the projection of the dust cover moves in the pulling direction from the mounting hole of the casing, the push acting on the other end of the press lever from the projection The pressure will decrease. Along with this, both the one end force of the pressing lever and the pressing force acting on the detection unit of the pressure sensor are reduced, so that the control unit sets the driving device to the stop state.

In this way, when the intake rocker dust cover is removed, the drive unit stops, and the rotation of the blower fan automatically stops.Therefore, the dust cover is removed when the suction pipe is attached to or removed from the intake port, or when blowing air. This can improve safety when the air intake is exposed to the outside, such as when it has come off.

[0010] In addition, the control unit is configured to set the drive device to a stopped state when the pressing force acting on the pressing lever force pressure sensor is reduced, and the protruding portion extends from the mounting hole. The drive unit stops when it is not completely pulled out, that is, when the dust cover is loosened.

In this way, the drive device is stopped before the intake port is exposed to the outside, and the rotation of the blower fan is stopped. Therefore, safety when removing the dust cover from the intake port can be improved.

[0011] In addition, the pressing force acting on the pressure sensor fluctuates with the removal of the dust cover, and the control unit changes the driving state of the driving device based on the fluctuation of the pressing force. Can be easily switched.

[0012] In the blower described above, the intermediate portion of the press lever is exposed on the inner peripheral surface of the intake port, and the intermediate portion of the press lever is pressed by the suction pipe inserted into the intake port. The lever can be configured such that one end of the lever presses the detection part of the pressure sensor.

[0013] In this configuration, by attaching the suction pipe to the intake port, the detection unit of the pressure sensor is pressed by the pressing lever, and the control unit switches the driving device from the stopped state to the drivable state. The driving state can be easily switched.

[0014] The aspects and advantages of the present invention described above, as well as other effects and further features will be described in detail with reference to the accompanying drawings and the following detailed description of exemplary and non-limiting embodiments of the present invention. It will become clearer.

Brief Description of Drawings

[0015] [Fig. 1] A diagram showing the blower of the present embodiment, and is a perspective view of a state in which a dustproof cover is closed and a front force is seen.

FIG. 2 is a view showing the blower of the present embodiment, and is a perspective view of the state where the dust cover is opened as viewed from the front.

FIG. 3 is a diagram showing a drive stop mechanism in the blower of the present embodiment, where (a) is a cross-sectional view with the dust-proof cover closed, and (b) is a cross-sectional view with the dust-proof cover open. .

FIG. 4 is a schematic configuration diagram showing a drive stop mechanism in the blower of the present embodiment.

FIG. 5 is a view showing the blower of the present embodiment, and is a perspective view of a state in which a vacuum pipe is attached as viewed from the front. FIG. 6 is a diagram showing a drive stop mechanism in the blower of the present embodiment, and is a cross-sectional view with a vacuum pipe attached.

BEST MODE FOR CARRYING OUT THE INVENTION

Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In the following description, the front / rear / left / right direction is the direction seen from the operator when the blower is used, and corresponds to the front / rear / left / right direction shown in each figure.

[0017] [Blower overall configuration]

The blower 1 of the present embodiment shown in FIG. 1 is a power blower that blows and cleans objects such as dead leaves and twigs accumulated on the ground, and sucks and cleans dust. A blower fan (not shown) provided in the fan, a driving device 30 for rotationally driving the blower fan, and a blower outside 40 for discharging the air flow generated by the rotating blower fan to the outside. And a drive stop mechanism (not shown) for setting the drive state of the drive device 30.

In this blower 1, a gripping part 50 is attached to the casing 10 and the drive device 30, and an operator can carry the blower 1 with the gripping part 50. Then, the worker can blow off dust such as dead leaves and twigs by discharging high-speed airflow toward the ground from the blower outlet of the blower pipe P1 connected to the air duct 40.

Further, in the blower 1 of the present embodiment, as shown in FIG. 5, a cylindrical vacuum pipe P 2 (suction pipe) is attached to the suction port 11 formed in the casing 10, and By attaching the net-shaped dust bag B, dust can be sucked from the suction port of the vacuum pipe P2 and collected in the dust bag B. In this way, Blower 1 can also be used as a vacuum tailor.

[0020] (Configuration of casing, blower fan and blower duct)

As shown in FIG. 1, the casing 10 is a box having a substantially circular shape when viewed from the side, and a blower fan (not shown) is disposed at the center thereof.

A blower fan 20 shown in FIG. 3 has a plurality of blades 21 formed around a rotating shaft (not shown) that extends in the front-rear direction at the center of the casing 10. When the blower fan 20 is rotated about the rotation axis, a high-speed empty space is formed from the outer side of the casing 10 toward the inner side. It is configured to generate airflow.

In addition, as shown in FIG. 2, an intake port 11 for taking outside air into the casing 10 is formed on the left side surface of the casing 10. The air inlet 11 has a circular shape when viewed from the front, and is formed at a position facing a blower fan (not shown) (see FIG. 3).

In addition, a cylindrical air duct 40 for discharging the air flow generated by the rotating air blowing fan to the outside of the casing 10 is formed at the front portion of the casing 10.

[0022] When the blower fan is rotated, the outside air sucked into the casing 10 from the intake port 11 becomes a high-speed air flow by the rotating blower fan. This air flow is discharged to the outside through the air duct 40.

[0023] (Configuration of Drive Device)

As shown in FIG. 1, the drive device 30 is disposed on the right side of the casing 10, and an engine (not shown) is housed in a box-shaped engine cover 31 attached to the right side surface of the casing 10. ing. The output shaft of this engine is connected to the rotating shaft of a blower fan (not shown), and the blower fan is configured to rotate by the driving force of the engine of the drive device 30.

[0024] (Configuration of dustproof cover)

As shown in Fig. 1, a dust-proof cover 60 is installed at the intake port 11 (see Fig. 2) of the casing 10 to prevent foreign matter from being sucked in!

In the dustproof cover 60, an outer peripheral plate 62 is raised on the outer peripheral edge of the circular side plate 61 in a side view toward the casing 10. A lattice-like opening 63 is formed in the side plate 61 and the outer peripheral plate 62.

As shown in FIG. 2, the rear end portion of the outer peripheral plate 62 of the dustproof cover 60 is attached to the rear side of the intake port 11 on the left side surface of the casing 10 by a hinge 64. As a result, the dust cover 60 can be rotated in the front-rear direction around the hinge 64 as a rotation center, and can be opened and closed with respect to the air inlet port 11! /.

Further, a mounting screw 65 is provided at the front end portion of the outer peripheral plate 62 of the dustproof cover 60. As shown in FIG. 3 (a), the mounting screw 65 is provided with a knob 65b disposed on the outer surface side of the dust cover 60 and a projection 65b inserted through a through hole 66 formed in the dust cover 60. And structure A male screw is formed on the protrusion 65b. In addition, a rubber ring 65c is externally fitted to the protrusion 65b to prevent the through-hole 66 force from coming off.

[0027] When the dust cover 60 is closed (see Fig. 1), the projection 65b of the mounting screw 65 is inserted into the mounting hole 12 (see Fig. 2) formed in the casing 10 on the front side of the air inlet 11. Will be. A female thread is formed on the inner peripheral surface of the mounting hole 12.

With the projection 65b of the mounting screw 65 inserted into the mounting hole 12, the operator

By grasping the 65 knob 65a and rotating the entire mounting screw 65 around its axis, the projection 6

5b is screwed into the mounting hole 12. In this way, attach the front end of the dust cover 60 to the casing.

Can be fixed to 10.

[0028] As shown in FIG. 1, when a blower fan (not shown) is rotated with the dustproof cover 60 closed, outside air is taken into the dustproof cover 60 from the opening 63. When air is sucked into the casing 10 through the intake port 11 (see FIG. 2), a high-speed air flow is generated by the rotating blower fan.

[0029] [Configuration of drive stop mechanism]

When the dust cover 60 is closed with respect to the intake port 11, the drive stop mechanism 70 shown in FIG. 3 is set to a state where the engine 32 (see FIG. 4) of the drive unit 30 can be driven, and the intake port 11 When the dust cover 60 is opened, the control mechanism sets the engine 32 to the stop state.

[0030] As shown in Fig. 3 (a), the drive stop mechanism 70 includes a pressure sensor 71 provided in the casing 10, a pressing lever 72 in contact with the detection portion 71a of the pressure sensor 71, and a pressure And a control unit 73 (see FIG. 4) for setting the driving state of the engine 32 of the driving device 30 based on a detection signal from the sensor 71.

[0031] (Configuration of pressure sensor)

The pressure sensor 71 shown in FIG. 3 (b) is a known pressure sensor that detects a pressing force against the detection unit 71a and outputs a detection signal indicating the pressure fluctuation to the control unit 73 (see FIG. 4). Is not limited.

Further, the pressure sensor 71 is disposed in a hollow portion 13 formed in the casing 10 on the front side of the air inlet 11. When this hollow portion 13 opens to the inner peripheral surface of the intake port 11, Both are in communication with the opening on the inner side of the mounting hole 12. The pressure sensor 71 is arranged in the vicinity of the opening 13a on the intake port 11 side in the inner space 13.

[0032] (Configuration of pressing lever)

As shown in FIG. 3 (b), the pressing lever 72 is a substantially Z-shaped member in plan view, and is disposed in the hollow portion 13 formed in the casing 10. The base end of this pressing lever 72

72a (the end) contacts the detection part 71a of the pressure sensor 71, and the tip part 72b (the other end) is inserted into the mounting hole 12 of the casing 10.

[0033] The base end portion 72a of the pressing lever 72 is disposed on the intake port 11 side in the hollow portion 13, and the front surface of the base end portion 72a is in contact with the detection portion 71a of the pressure sensor 71.

In addition, a through hole 72e is formed in the base end portion 72a on the inner side of the contact portion with the pressure sensor 71, and the pressing lever 72 is moved by the fixed shaft 72d passed through the through hole 72e. It is supported by one single 10.

[0034] In the pressing lever 72, the intermediate portion 72c on the outer side of the base end portion 72a is formed on the intake port 1.

It is formed so as to be inserted into the opening 13a on the one side. Therefore, the intermediate portion 72c of the pressing lever 72 is exposed from the opening 13a to the inner peripheral surface of the intake port 11.

Further, the intermediate portion 72c of the pressing lever 72 is extended outward from the base end portion 72a, and is directed forward from the outer end portion to a position facing the inner opening of the mounting hole 12. It has been extended.

In addition, in the pressing lever 72, a tip 72b formed at a position facing the opening on the inner side of the mounting hole 12 is extended toward the outer side, and is inserted into the mounting hole 12. Has been inserted.

[0036] As shown in FIG. 3 (a), the projection 65b of the mounting screw 65 of the dust cover 60 is inserted into the mounting hole 12 of the casing 10, that is, the dust cover 60 is closed. In FIG. 1, the projection 65 b of the mounting screw 65 is configured to press the tip 72 b of the pressing lever 72.

[0037] As described above, when the protrusion 65b of the mounting screw 65 presses the tip 72b of the pressing lever 72, the tip 72b of the pressing lever 72 is pushed inward. As a result, the entire pressing lever 72 is tilted in the direction of arrow A with the fixed shaft 72d as the rotation center. Then, when the entire pressing lever 72 is tilted in the direction of arrow A, the base end portion 72a of the pressing lever 72 presses the detection unit 71a of the pressure sensor 71, and the control unit 73 (see FIG. 4)), a detection signal is output.

[0038] On the other hand, the projection 65b of the mounting screw 65 of the dust cover 60 is not inserted into the mounting hole 12, that is, the dust cover 60 is open as shown in FIG. In Fig. 2, the pressing lever 72 does not tilt because no pressing force is applied to the tip 72b of the pressing lever 72. Accordingly, since the pressing force does not act on the detection unit 71a of the pressure sensor 71, no detection signal is output from the pressure sensor 71 to the control unit 73 (see FIG. 4).

[0039] Furthermore, when the vacuum pipe P2 is inserted into the intake port 11 (see FIG. 5) with the dust cover 60 open, as shown in FIG. 6, it is formed on the outer peripheral surface of the vacuum pipe P2. The engaged protrusion P21 thus inserted is inserted into the opening 13a of the hollow portion 13 on the intake port 11 side.

[0040] In this manner, the intermediate portion 72c of the pressing lever 72 is pressed forward by the engaging protrusion P21 inserted into the opening 13a, whereby the intermediate portion 72c is pushed forward. As a result, the entire pressing lever 72 tilts in the direction of arrow A with the fixed shaft 72d as the center of rotation.

Then, when the entire pressing lever 72 is tilted in the direction of arrow A, the base end portion 72a of the pressing lever 72 presses the detection unit 71a of the pressure sensor 71, and the control unit 73 (see FIG. 4)), a detection signal is output.

[0041] (Configuration of control unit)

The control unit 73 shown in FIG. 4 controls the drive of the engine 32 based on the variation of the pressing force with respect to the detection unit 71a of the pressure sensor 71. The control unit 73 is configured using various known control circuits, and the configuration is not limited.

[0042] In this control unit 73, the dust-proof cover 60 is closed (see Fig. 3 (a)) and the vacuum pipe P2 is inserted into the intake port 11 (see Fig. 6). Pressing lever 72 force When a pressing force is applied to the detecting portion 71a of the pressure sensor 71 and a detection signal is output from the pressure sensor 71, the engine 32 of the driving device 30 is set in a drivable state. In this state, the blower fan 20 can be rotated by driving the engine 32.

[0043] In addition, the control unit 73 presses the dust cover 60 in a state where the dust cover 60 is open (see FIG. 3B). When the pressing force is not applied from the lever 72 to the detection unit 71a of the pressure sensor 71 and the detection signal is not output from the pressure sensor 71, the engine 32 of the drive device 30 is set to the stop state. In this state, since the engine 32 is stopped, the rotation of the blower fan 20 is stopped. In addition, since the engine 32 cannot be driven, the blower fan 20 cannot be rotated by an erroneous operation.

[0044] Furthermore, the control unit 73 is configured to set the engine 32 of the drive device 30 to a stopped state even when the pressing force acting on the detection unit 71a of the pressure sensor 71 is reduced from the pressing lever 72. Has been.

Accordingly, when the mounting screw 65 shown in FIG. 3A is loosened and the pressing force acting on the detecting portion 71a of the pressure sensor 71 from the pressing lever 72 is reduced, the engine 32 is stopped. In this state, since the engine 32 is stopped, the rotation of the blower fan 20 is stopped. In addition, since the engine 32 cannot be driven, the blower fan 20 cannot be rotated by an erroneous operation.

[0045] [Function and effect of blower]

In the blower 1 of this embodiment, as shown in FIG. 3, when the dustproof cover 60 is opened, when the dustproof cover 60 is moved from the mounting hole 12 of the casing 10 in the pulling direction 65 b of the mounting screw 65 of the dustproof cover 60, The pressing force acting on the tip 72b of the pressing lever 72 from the protrusion 65b is reduced.

Along with this, the pressing force acting on the detecting portion 71a of the pressure sensor 71 from the base end portion 72a of the pressing lever 72 also decreases, so the control unit 73 stops the engine 32 (see FIG. 4) of the driving device 30. Will be set to state.

As described above, when the dust cover 60 is opened, the engine 32 is stopped, and the rotation of the blower fan 20 is automatically stopped. Therefore, when the vacuum pipe P2 is removed from the intake port 11 (see Fig. 5). In addition, safety can be improved when the air intake 11 is exposed to the outside, such as when the dust cover 60 is removed during work.

[0046] Further, in the control unit 73 (see Fig. 4), when the pressing force acting on the pressure sensor 71 from the pressing lever 72 decreases, the engine 32 (see Fig. 4) of the driving device 30 is stopped. The projection 65b of the mounting screw 65 of the dust cover 60 is The engine 32 stops when the mounting screw 12 of the dust cover 60 is loosened, that is, when the mounting screw 65 of the dust cover 60 is not completely pulled out from the mounting hole 12 of the bracket 10.

As described above, the engine 32 is stopped before the air intake 11 of the casing 10 is exposed to the outside, and the rotation of the blower fan 20 is stopped. Therefore, the safety when opening the dust cover 60 from the air intake 11 is improved. Can be increased.

[0047] Further, as the dust cover 60 is attached and detached, the pressing force acting on the pressure sensor 71 fluctuates, and the control unit 73 (see FIG. 4) controls the engine 32 of the drive device 30 based on the fluctuation of the pressing force. Since the driving state is changed, the driving state of the engine 32 can be easily switched.

[0048] Further, by attaching the vacuum pipe P2 to the intake port 11, the detection unit 71a of the pressure sensor 71 is pressed by the pressing lever 72, and the control unit 73 (see FIG. 4) also drives the engine 32 in the stop state force. Since the state is switched to a possible state, the driving state of the engine 32 can be easily switched.

[0049] [Other Embodiments]

The exemplary embodiment of the present invention has been described above, but various modifications and changes may be made to this embodiment without departing from the spirit and scope of the present invention as defined in the appended claims. Is possible.

For example, in the present embodiment, as shown in FIG. 3 (b), the force of screwing the mounting screw 65 of the dustproof cover 60 into the mounting hole 12 of the casing 10 is the pin pin formed on the dustproof cover 60. The dust cover 60 is fixed to the casing 10 by fitting protrusions such as a hook into the mounting holes formed in the casing 10, and the pressing lever 7 is fixed by these protrusions.

Press 2 to press.

In the present embodiment, as shown in FIG. 2, the dust cover 60 is attached to the casing 10 by the hinge 64 and is configured to open and close. However, the dust cover 60 It is also possible to remove the whole from the side surface of the casing 10.

Claims

The scope of the claims

[1] A blower fan provided in a casing, a drive device that rotationally drives the blower fan, a blower duct that discharges an air flow generated by the rotating blower fan to the outside, and the casing A blower comprising: a dustproof cover that covers the formed air inlet; and a drive stop mechanism for stopping the drive device, wherein the protrusion provided on the dustproof cover includes: The dust cover is attached to the casing by being inserted into a mounting hole formed in the casing, and the drive stop mechanism is

A pressure sensor provided in the casing;

One end is in contact with the detection portion of the pressure sensor, the other end is disposed in the mounting hole, and the other end is pressed by the protrusion inserted into the mounting hole, so that one end of the pressure sensor is A pressing lever for pressing the detection unit;

The driving device is set in a driveable state when a pressing force is acting on the detection portion of the pressure sensor, and the driving is performed when the pressing force acting on the detection portion of the pressure sensor decreases. And a control unit for setting the apparatus to a stopped state.

[2] The intermediate portion of the pressing lever is exposed on the inner peripheral surface of the intake port, and the intermediate portion of the pressing lever is pressed by a suction pipe inserted into the intake port. 2. The blower according to claim 1, wherein one end of the lever is configured to press the detection portion of the pressure sensor.