JP2001198052A - Blowing/sucking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blowing/sucking device capable of obtaining sufficient suction force without suddenly expanding a dust collecting bag at the moment of turning on an activation switch and preventing dust inside the dust collecting bag from getting out of the bag. SOLUTION: To the main body 10 of this blowing/sucking device, a vacuum nozzle 40 and the dust collecting bag 50 are connected. Inside the main body 10, a vacuum introducing path 10c, an air introducing path 10d, an air passage 13a and a communicating path 60a for forming an air introducing passage for communicating the vacuum nozzle 40 and the dust collecting bag 50 are formed. A fan 18 is disposed in the air introducing passage and air sucked from the vacuum nozzle 40 by the rotation of the fan 18 is led to the dust collecting bag 50 through the air introducing passage. Inside the main body 10, a pressure release hole 10j for allowing a blower nozzle 30 to communicate with the dust collecting bag 50 is formed separately from the air introducing passage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower / suction device,
In particular, it relates to a blower / suctioner provided with a dust bag.

[0002]

2. Description of the Related Art A blower / suction device having both a blower function and a suction function has been known. This device has a switching mechanism for selectively switching the blower function and the suction function. Is provided.

For example, as shown in FIG. 14, EP 0792578 A2 describes a blower / suction device provided with a switching mechanism. This apparatus includes a blower nozzle 130 having one end attached to the main body 110 and an outlet formed at the other end, and a vacuum nozzle provided parallel to the blower nozzle 130 and having one end attached to the main body 110 and the other end formed with a suction opening. 140 are provided. A fan 118 is rotatably supported by the main body 110, and is connected to a dust collection bag 150 that receives air sucked from the suction port and stores dust mixed in the air.
Further, the main body 110 has a valve unit 1 as a switching mechanism capable of selectively switching between a vacuum mode position for guiding air to the dust collection bag 150 and a blower mode position for guiding air to the blower nozzle.
60 are provided.

When the valve section 160 is at the position shown by the dotted line, a vacuum mode for performing suction is set. At this time, all the air sucked from the suction port is in the dust bag 150.
It is configured to be introduced into.

[0005]

However, the conventional blower
In the suction device, when a finely woven bag is used as the dust bag, the dust bag has a problem that exhaust resistance is generated and a sufficient suction force cannot be obtained. At the moment when the start switch of the blower / suction device is turned on, the dust bag suddenly expands,
There is a problem that dust adhering to the inside and outside of the dust collecting bag is scattered around.

In order to solve these problems, it has been practiced to increase the stitch size of the dust bag or to use a mesh material having a large stitch for a part of the dust bag. , Fine dust in the dust collected in the dust bag,
Since a large amount is produced through these large stitches, there is a problem in dust collection efficiency when cleaning sawdust and the like.

Therefore, according to the present invention, there is provided an air blower in which the dust collecting bag does not expand rapidly at the moment when the start switch is turned on, a sufficient suction force can be obtained, and the dust in the dust collecting bag does not come out of the bag.・ To provide a suction device.

[0008]

In order to achieve the above object, the present invention provides a nozzle 3 having a main body 10 and one end attached to the main body 10 and having openings 30a and 40a formed at the other end.
0 and 40 and a dust bag 50 connected to the main body 10 are provided.
Air introduction passages 10c, 10d, 13a, 6
0a is formed, and the air introduction passages 10c, 10d, 13
A fan 18 supported by the main body 10 is provided in each of the dust collecting bags 50 through the air introduction passages 10c, 10d, 13a, and 60a. In a blower / suction device in which suction work is performed by accommodating dust mixed in air in the dust collecting bag 50, a pressure relief hole 10j that connects the nozzle 30 and the dust collecting bag 50 has The air introduction passage 10
c, 10d, 13a, and 60a to provide a blower / suction device formed on the main body 10 separately.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION
The suction device will be described with reference to FIGS. First, the configuration of the entire blower / suction device will be described with reference to FIGS. The blower / suction device 1 includes a main body 10,
A blower nozzle 30 connected to the main body 10, a vacuum nozzle 40, and a dust bag (dust bag) 50 are provided. The blower nozzle 30 and the vacuum nozzle 40 constitute a nozzle. The power cord 11 is located at the top of the main body 10.
The main body 10 is integrally provided with a fan case 13 and a motor case 14 located behind the fan case 13, and is located substantially below the fan case 13 in the main body 10. A branching chamber 15 (FIG. 3) that defines a cylindrical hollow space is formed in the portion where the air flows.

A suction collar 16 is provided in front of the fan case 13 for inserting the rear end of the vacuum nozzle 40, and a rear end of the blower nozzle 30 is provided substantially in front of the branch chamber 15. A blowing collar 17 for insertion is provided, and a suction collar 16 is provided.
And the blowing collars 17 are arranged substantially vertically. A dust bag 50 is provided substantially below the branch chamber 15 (FIG. 3).
Is formed with a dust collecting port 10a communicating with the inside. A blower introduction passage 10b, which is an air passage communicating from the branch chamber 15 to the collar 17, is formed in the main body substantially in front of the branch chamber 15, and a branch chamber 1 is provided substantially below the branch chamber 15.
A vacuum introduction passage 10c, which is an air passage communicating from 5 to the dust collection port 10a, is formed in the main body 10. A blower introduction passage opening 10e is formed in the main body 10 at an end of the blower introduction passage 10b on the branch chamber 15 side, and a vacuum introduction passage opening is formed on an end of the vacuum introduction passage 10c on the branch chamber 15 side. A portion 10f is formed.

As shown in FIG. 3, a fan 18 is rotatably provided in the fan case 13, and a motor 19 is provided in the motor case 14. Motor 19
Is configured to start and stop driving by operating a start switch (not shown) provided on the main body 10. The output shaft 19a of the motor 19 is the fan 1
8 is connected. The output shaft 19a of the motor 19 forms a predetermined angle with respect to the longitudinal direction of the vacuum nozzle 40. The fan 18 has a cutter with a sharp edge, and has a function of crushing relatively large dust passing through the fan 18. A scroll-shaped air passage 13a is formed between the fan 18 and the fan case 13 so as to communicate from the suction collar 16 to the branch chamber 15. The downstream end of the air passage 13a is connected to the main body 10. It is formed and communicated with an air introduction passage 10 d communicating with the branch chamber 15. An air introduction passage opening 10g is formed at an end of the air introduction passage 10d on the branch chamber 15 side. Vacuum introduction path 10c, air introduction path 10d, air passage 13a
Constitutes an air introduction passage.

The tip of the blower nozzle 30 is an outlet 30a.
And the rear end of the blower nozzle 30 is
Is inserted. The vacuum nozzle 40 is provided in parallel with and integral with the blower nozzle 30. The front end forms a suction port 40a, and the rear end is fitted into the suction collar 16. The suction port 40a corresponds to the opening of the nozzle. The blower nozzle 30 and the vacuum nozzle 40 are long, but in order to increase the flow velocity of the air blown out from the blower nozzle 30, the blower nozzle 30 has
a, and the cross-sectional area is smaller than the cross-sectional area of the vacuum nozzle 40. On the other hand, the vacuum nozzle 4
0 has a constant diameter in the longitudinal direction.

A dust collecting bag (dust bag) 50 made of a material having air permeability is provided in the dust collecting port 10a.
Are fitted and connected. The main body 10 has a divided configuration, and the main body 10 is vertically divided into a right main body and a left main body in FIG. Accordingly, the branch chamber 15 is divided into a right branch chamber and a left branch chamber, and the dust nozzle 51 is divided into a right dust nozzle and a left dust nozzle. Further, the vacuum nozzle 40 and the blower nozzle 30 also have a divided configuration, and are divided into a right nozzle portion and a left nozzle portion in the vertical direction in FIG.

Next, the configuration of the switching mechanism 2 will be described with reference to FIGS. The switching mechanism 2 includes a rotating member 60 having a substantially cylindrical outer shape, and is inserted and fitted into the branch chamber 15 (FIG. 3) forming a hollow cylindrical space. The rotating member 60 is rotatably supported by the branch chamber 15 about its axis. As shown in FIG. 4 (a), a switching lever 61 projecting outward in the direction of the axis of the rotating member 60 in a substantially single-character shape is integrated with the rotating member 60 on the upper surface portion 60 </ b> A of the rotating member 60. It is provided in. The user can grip the switching lever 61 by hand and rotate the rotating member 60 about the axis thereof to switch between blowing and suctioning. Since the rotating member 60 and the switching lever 61 are provided integrally, the switching mechanism 2 for switching between the blower mode and the vacuum mode can be constituted by a single component, reducing costs and reducing product reliability. And the durability of the product can be improved.

Inside the rotary member 60, there is formed a tubular communication passage 60a serving as an air passage. Communication passage 60a
Constitutes an air introduction passage together with the vacuum introduction passage 10c, the air introduction passage 10d, and the air passage 13a. A substantially rectangular first opening 60b is formed on the peripheral surface of the rotating member 60, and a substantially rectangular first opening 60b is formed on the opposite peripheral surface that forms a predetermined obtuse angle with respect to the axis of the rotating member 60. Two openings 60c are formed, and the communication path 60a is connected to these two openings 6c.
0b and 60c are communicated. Since the communication path 60a is bent in a substantially square shape inside the rotating member 60, FIG.
As shown in (b), a part of the inner wall 60d that defines the communication path 60a is visible when looking through the opening 60c. Further, since the communication path 60a is gradually bent, as shown in FIG.
A part of the other opening 60b is visible when looking into from the outside. The openings 60b and 60c, the blower introduction passage opening 10e, the vacuum introduction passage opening 10f, and the air introduction passage opening 10g (FIG. 3) all have the same shape.
It has a substantially rectangular shape as described later. Also, the communication passage 60a
In any position, the cross-sectional shape of the cross-section is the same as that of the opening 60b.
The cross-sectional shape of a has a substantially rectangular shape as shown in FIG. The cross-sectional shape of the air introduction passage 10d has a substantially rectangular shape as shown in FIG. 11, and the cross-sectional shape of the vacuum introduction passage 10f has a substantially rectangular shape as shown in FIG.
The cross-sectional shape of the blower introduction path 10e is also substantially rectangular. The sectional shapes of the air introduction passage 10d, the communication passage 60a, the vacuum introduction passage 10c, and the blower introduction passage 10b are substantially the same. The openings 60 b and 60 c are provided with ribs 62 having the same shape as the respective openings and slightly projecting outward in the radial direction of the rotating member 60.

When the user looks at the switching mechanism 2 from the outside of the blower / suction device 1, the user can recognize which direction the communication unit 60a is pointing, that is, the current mode is the blower mode. 4A, the upper surface 60A of the rotating member 60 is provided with a groove 60e and a groove 60e along a side wall that defines a communication path. A groove 60f is formed. 4 (c) and FIG. 5, the space between the inner wall 60d defining the communication passage 60a and the peripheral wall forming the outer periphery of the communication passage 60 is hollow.

As shown in FIGS. 4C and 6, the peripheral surface of the rotating member 60 includes an opening 60b and an opening 60c.
Two slits 60g, 60g are formed in a portion between the opening 60b and the opening 60b at an intermediate position between the opening 60b and the opening 60b. Slit 6
0g and 60g are parallel to each other from the lower surface 60B of the rotating member 60 toward the upper surface 60A.
It extends to a position substantially half the axial length of zero. As shown in FIG. 7, a portion between the two slits 60 g and 60 g is configured as a rod-shaped body 66,
Can be elastically deformed in the radial direction. This rod 6
6, a positioning projection 63 protruding outward in the radial direction of the rotating member 60 is provided at an end near the lower surface 60B. The rotation member 60 is positioned at an appropriate position in the vacuum mode or the blower mode by engaging the positioning projection 63 with an engagement groove 10h or an engagement groove 10i described later.

The lower surface portion 60B is provided with an annular convex portion 64 slightly protruding in the axial direction of the rotating member 60 around the lower surface portion 60B. A part of the annular convex portion 64,
As shown in FIG. 4C, a rotation stopper 65 is provided at a position corresponding to the center of c, which protrudes in parallel with the axial direction of the rotating member 60. The radial distance from the axis of the rotating member 60 to the rotation stopper 65 is slightly shorter than the radial distance from the axis of the rotating member 60 to the annular projection 64. Positioning projection 63 and engagement groove 10h, 1
0i corresponds to a positioning means.

Next, the branch chamber 15 accommodating the switching mechanism 2 and the vicinity of the branch chamber 15 will be described with reference to FIGS. The branch chamber 15 has substantially the same cylindrical shape as the rotating member 60 of the switching mechanism 2, and its axis is oriented in the left-right direction of the blower / suction device 1. The rotating member 60 is the branch chamber 1
5, the upper surface 60 of the rotating member 60
Only A is exposed on the surface of the blower / suction device 1, and the other parts of the switching mechanism 2 are housed in the branch chamber 15.

In the right branch chamber 15a, the switching mechanism 2
On the inner wall of the main body 10 at a position where the lower surface portion 60B of the switching mechanism 2 comes into contact with the switching mechanism 2 when it is stored, it has substantially the same shape as the annular convex portion 64 provided on the lower surface portion 60B. And an annular groove 15b which is always engaged.
A part of the annular groove 15b is located between a position corresponding to the center of the air introduction passage opening 10g and a position corresponding to the center of the blower introduction passage opening 10e. A deep groove 15c is formed on the shorter side. The above-described rotation stopper 65 is always in contact with the deep groove 15c, and the rotation stopper 65 can rotate while being in contact with the periphery of the deep groove 15c, and the end 15d of the deep groove 15c,
The rotation is stopped by abutting on 15e. Therefore, the rotation member 60 that rotates integrally with the rotation stopper 65 is restricted to be rotatable only at a predetermined angle.

An engaging groove 10h recessed radially outward of the branch chamber 15 is provided on the peripheral wall surface of the branch chamber 15 and between the air introduction path opening 10g and the vacuum introduction path opening 10f. Are formed. An engagement groove 10i that is recessed radially outward of the branch chamber 15 is provided on the peripheral wall surface of the branch chamber 15 and at a position between the air introduction path opening 10g and the blower introduction path opening 10e. Is formed. These engagement grooves 10h and 10i are configured to be able to engage with the positioning projections 63.

A pressure relief hole 10j having an opening area smaller than that of the dust collection port 10a is provided adjacent to the dust collection port 10a in front of the dust collection port 10a. The pressure relief hole 10j forms an air passage communicating with the blower nozzle 30 via the blower introduction passage 10b, and the dust collection bag 50 in the vacuum mode.
The pressure of the air in the dust bag 50 is prevented from becoming too high instantaneously by letting a part of the air sucked into the blower introduction passage 10b escape.

The pressure relief hole 10j communicating from the inside of the dust collecting bag 50 to the blower nozzle 30 via the blower introduction path 10b is provided. Hole 10j
Thus, the flow of the air coming out of the dust bag 50 can be ensured, and a rapid rise in the pressure inside the dust bag can be prevented. For this reason, it is possible to prevent the dust bag from abruptly expanding, and to prevent dust adhering to the inside and outside of the dust bag from scattering around. The amount of dust passing through the ventilation path from the dust bag to the blower introduction path 10b is very small, and the dust is again sucked from the suction port 40a of the vacuum nozzle 40, so that the dust collection efficiency is reduced. I will not do it.

In the above configuration, when the positioning projection 63 of the switching mechanism 2 is engaged with the engagement groove 10h,
The switching mechanism 2 is maintained at the vacuum mode position as shown in FIG. That is, the blower introduction path opening 10e is shielded by the rotating member 60, and the openings 60b,
Reference numeral 60c corresponds to the air introduction passage opening 10g and the vacuum introduction passage opening 10f, respectively, and the communication passage 60a communicates with the air introduction passage 10d and the vacuum introduction passage 10c.

When the motor 19 is rotated by operating a start switch (not shown) in this state, the fan 18 rotates, so that air and dust are sucked from the suction port 40 a of the vacuum nozzle 40 and flow into the fan case 13. And fan 1
Dust and dirt are crushed by the crushing function of 8 itself,
Air and dust pass through the scroll-shaped passage 13a,
It reaches the inside of the branch chamber 15. Since the rotating member 60 in the branch chamber 15 blocks the blower introduction path opening 10e,
The sucked air and dust are not introduced into the blower nozzle 30, but are guided to the dust bag 50 via the communication path 60a, the vacuum introduction path 10c, the dust collection port 10a, and the dust nozzle 51, and the dust is collected smoothly. . Air introduction path 1 which is an air passage
0d, the communication path 60a, and the vacuum introduction path 10c have substantially the same cross-sectional shape, and since there is no extreme angle, no dust or the like accumulates in and near the switching mechanism 2, and It is possible to prevent a failure in the switching operation of the switching mechanism 2.

Next, from the state where the positioning projection 63 of the switching mechanism 2 is engaged with the engagement groove 10h, the switching lever 61 of the switching mechanism 2 is pinched and rotated counterclockwise in FIG. The projection 63 for use comes off the engagement groove 10h, and the projection 63 for positioning engages with the engagement groove 10i as shown in FIG. This engagement maintains the blower mode. With the rotation of the rotating member 60, the communication path 60a also rotates. In this state, the vacuum introduction passage opening 10f is shielded by the rotating member 60, and the air introduction passage 10d, the communication passage 60a, and the blower introduction passage 10b communicate with each other.

When the motor 19 is rotated in this state, the fan 18 rotates similarly to the vacuum mode.
Air is sucked from the suction port 40 a of the vacuum nozzle 40 and flows into the fan case 13, and the sucked air passes through the scroll-shaped passage 13 a and passes through the air introduction passage 10 a.
d, the air is introduced into the blower nozzle 30 through the communication path 60a and the blower introduction path 10b, and air is blown out from the blowout port 30a. Even in the blower mode, since air is sucked from the suction port 40a of the vacuum nozzle, dust may be sucked together. However, since the blower nozzle 30 is formed in a tapered shape, the wind speed sucked from the vacuum nozzle 40 Since the wind speed blown out from the blower nozzle 30 is faster than that, the fallen leaves and large dust are blown off, so that large dust and the like are not sucked through the suction port 40a. As in the case of the vacuum mode, the air introduction passage 10d, which is an air passage,
a, since the blower introduction passage 10b is tubular and their cross-sectional shapes are substantially the same, no dust or the like accumulates in or near the switching mechanism 2;
Can be prevented from occurring in the switching operation.

The blower / suction device according to the present invention is not limited to the above embodiment, and various modifications and improvements are possible within the scope described in the claims. For example, in the present embodiment, the positioning protrusion 63 is provided on the rotating member 60 and the engaging grooves 10h and 10i are formed in the branch chamber 15 of the main body 10. However, the engaging groove is formed on the rotating member 60, Branch room 1
5 may be provided with a positioning projection so that the engaging groove and the positioning projection can be engaged with each other.

In this embodiment, the blower nozzle and the vacuum nozzle are integrally provided to constitute the nozzle. However, the blower nozzle and the vacuum nozzle are separately provided, and only one of them is provided. May be replaced according to the purpose. In this case, the pressure relief hole may be configured to communicate the dust bag and the vacuum nozzle.

[0030]

According to the blower / suction device of the first aspect, since the pressure relief hole communicating the nozzle and the dust bag is formed, the exhaust resistance against the suction of air during the suction operation is small. Therefore, a sufficient suction force can be obtained. Further, the sudden expansion of the dust bag at the moment when the start switch is turned on can be alleviated. Further, since a dust bag having a smaller stitch can be used, it is possible to reduce the leakage of dust in the bag to the outside.

[Brief description of the drawings]

FIG. 1 is a side view showing a blower / suction device according to an embodiment of the present invention.

FIG. 2 is a plan view showing a blower / suction device according to the embodiment of the present invention.

FIG. 3 is a schematic sectional view showing a blower / suction device according to the embodiment of the present invention.

FIGS. 4A and 4B show a switching mechanism of the blower / suction device according to the embodiment of the present invention, wherein FIG. 4A is a plan view, FIG.
(C) is a bottom view.

FIG. 5 is a sectional view taken along the line VV of FIG.

FIG. 6 is a side view showing a switching mechanism of the blower / suction device according to the embodiment of the present invention.

FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6;

FIG. 8 is a cross-sectional view of a main part showing a blower / suction device according to an embodiment of the present invention.

FIG. 9 is an essential part cross-sectional view showing a vacuum mode position of the blower / suction device according to the embodiment of the present invention.

FIG. 10 is a sectional view of a main part showing a blower mode position of the blower / suction device according to the embodiment of the present invention.

FIG. 11 is a view showing the internal contour of the air introduction path along the line XI-XI in FIG. 9;

FIG. 12 is a view showing the internal contour of the communication passage along the line XII-XII in FIG. 9;

FIG. 13 is a view showing the internal contour of the vacuum introduction path along the line XIII-XIII in FIG. 9;

FIG. 14 is a cross-sectional view of a main part showing a switching mechanism of a conventional blower / suction device.

[Description of Signs] 10 Main body 10c Vacuum introduction path 10d Air introduction path 10j Pressure relief hole 13a Air passage 18 Fan 30 Blower nozzle 40a Suction port 40 Vacuum nozzle 50 Dust collection bag 60a Communication passage

Claims (1)

[Claims] 1. A main body, a nozzle having one end attached to the main body and an opening formed at the other end, and a dust bag connected to the main body are provided. An air introduction passage communicating with the dust collecting bag is formed, a fan supported by the main body is provided in the air introduction passage, and air sucked from the opening is collected through the air introduction passage. An air blower in which dust is introduced into the dust bag and suction work is performed by storing dust mixed in the air into the dust bag.
A blower / suctioner, wherein a pressure relief hole communicating the nozzle and the dust bag is formed in the main body separately from the air introduction passage.