JP2015102062A - Blower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make dust less likely to scatter against a worker by solving such a problem that work for blowing-out dust and the like in the anchor hole of a concrete slab by a blower is carried out heretofore and in this case, a nozzle which has a slender tip and can be inserted into the anchor hole is mounted in a blower body, however the dust and the like blown out from the anchor hole scatters toward the worker to make it difficult for the worker to perform work.SOLUTION: A plurality of small holes 21 to 21A are provided in the side part of a nozzle 20. Air curtain 22 is formed around the nozzle 20 by wind blown from each of the small holes 21. Dust blown from an anchor hole CH is shielded by the air curtain 22 to make the dust less likely to be blown to a worker M.

Description

  The present invention is a simple air blower for blowing off dust scattered on a floor surface or dust accumulated in a small-diameter hole, for example, at a construction work site. About the excellent blower.

This type of blower has a configuration in which a fan built in the main body housing is rotated by a motor, thereby generating a flow of air from the intake port to the blower port provided in the main body housing, so that a large amount of air can be blown from the blower port. I have. Conventionally, techniques relating to this type of blower are disclosed in the following patent documents.
This blower is used as a simple blower in various situations. For example, in the above construction work site, this blower is used to blow out dust accumulated in a small-diameter anchor hole (bottom hole for screwing) provided on the upper surface (floor surface) of a concrete slab. In this case, a dedicated nozzle having a small diameter at the tip is attached to the outlet of the blower body. By inserting the tip of the anchor hole nozzle into the anchor hole and blowing air, dust or the like accumulated in the anchor hole can be easily blown off.

JP 2001-50196 A JP-A-45-30389

However, when the tip of the nozzle is inserted into the anchor hole and the wind is blown, there is a problem that dust or the like blown out from the anchor hole is scattered to the operator side and the operation is difficult.
The present invention improves the usability of the blower by preventing the blown-out dust from being scattered to the operator side when the tip of the nozzle is inserted into, for example, a small-diameter anchor hole and the accumulated dust is blown out. Objective.

The above problem is solved by the following invention.
1st invention is a blower provided with the main body which equipped with the ventilation fan, and the nozzle which can be mounted | worn with the ventilation port provided in the main body, Comprising: This nozzle is equipped with the dust of the wind from the blowing port provided in the front-end | tip. It is a blower provided with the scattering suppression means for suppressing scattering.
According to 1st invention, it is suppressed that the dust etc. which are scattered from the nozzle front end side are blocked | interrupted by the scattering suppression means, and are sprayed on the operator side. As the scattering means, a plurality of small holes can be provided on the side of the nozzle. An air curtain can be generated around the nozzle by the air blown from each small hole, and the air curtain can suppress scattering of dust and the like to make it difficult to blow to the operator side. Moreover, an umbrella part or a shielding board can be provided in the side part of a nozzle as scattering suppression means. By projecting the umbrella portion or the shielding plate around the nozzle, it is possible to suppress the scattering of dust and the like scattered from the tip end side of the nozzle and make it difficult to blow to the operator side.
2nd invention is a blower which provided the small hole in the side part of the nozzle as scattering suppression means in 1st invention.
According to the second aspect of the invention, the air curtain is generated around the nozzle by the wind blown from the small hole, and the scattering of dust and the like to the worker side is blocked. Because dust scattered from the tip of the nozzle is blocked by this air curtain and is difficult to be blown to the worker, the worker can easily take a tight posture to avoid dust scattering as before. Work can be performed in a posture, and the usability of the blower can be improved in this respect, and as a result, workability of this type of dust blow-off work can be improved.
Further, since the air is blown out from the small hole in addition to the air outlet at the tip of the nozzle, it is possible to reduce the pressure loss when the air is blown out only from the air outlet, thereby reducing the motor load, and thus improving the durability of the blower. be able to.
According to a third invention, in the first or second invention, the nozzle is made of synthetic resin, and includes a swinging portion for changing the blowing direction between the blowing port and the mounting port with respect to the main body, A blower having a small hole in a side portion between the swinging portion and the attachment port.
According to the third aspect of the invention, the air curtain (scattering suppression means) is always generated in a certain range for the worker regardless of the nozzle blowing direction, and the scattering of dust or the like to the worker side is stable. Blocked.
A fourth aspect of the invention is a nozzle that can be attached to a blower outlet of a blower, and is provided with a small hole for blowing air to the side part separately from the outlet provided at the tip.
According to the fourth aspect of the invention, when the nozzle is mounted on the blower and the wind is blown out from the blowout port at the tip thereof, the wind is blown out from the small hole to the side to generate an air curtain. The air curtain that is generated in the middle of the nozzle in the longitudinal direction blocks the dust that scatters toward the worker side. The dust blowing operation can be performed in a proper posture, thereby improving the usability of the nozzle and improving the workability of this type of operation.

It is a whole perspective view of the blower concerning this embodiment. It is a whole side view of the blower concerning this embodiment. In this figure, a part of the main body is shown in a vertical section. It is a side view of a main body. In this figure, the nozzle is shown in a removed state. FIG. 4 is a cross-sectional view taken along line (IV)-(IV) in FIG. 3 and is a cross-sectional view of the main body. It is a whole perspective view of a nozzle. It is a figure which shows a mode that the operation | work which blows off the dust in an anchor hole is performed using the blower of this embodiment.

Next, an embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, the blower 1 of this embodiment includes a main body 10 and a nozzle 20. The main body 10 includes an electric motor 12 as a drive source on the right side of the main body housing 11. As shown in FIGS. 1 to 3, a cylindrical air outlet 13 is integrally provided at the front portion of the main body housing 11. Further, a handle portion 15 that is held by an operator is provided on the motor housing of the electric motor 12 on the right side of the main body housing 11. The handle portion 15 has a loop shape extending from the front portion to the rear portion of the motor housing. A trigger-type switch lever 15 a is provided on the inner peripheral side of the handle portion 15. When the switch lever 15a is pulled with the fingertip of the hand held by the operator holding the handle portion 15, the electric motor 12 is activated. On the left side of the handle portion 15, a lock button 15b for locking the pulling operation state of the switch lever 15a is provided. A power cord 16 is drawn from the rear portion of the handle portion 15. The electric motor 12 uses commercial AC 100V as a power source. Further, legs 15c, 15c for integrally installing the blower 1 on the floor surface F as shown in FIGS. 2 and 3 are provided integrally with the handle portion 15 on the lower surface of the handle portion 15. Yes. The blower 1 of the present embodiment can be installed in a self-supporting state at three points, that is, a pair of front and rear leg portions 15 c and 15 c and a leg portion 11 a provided at the lower portion of the main body housing 11.
As shown in FIG. 4, a blower fan 17 is attached to the output shaft 12 a of the electric motor 12. A so-called centrifugal fan is used as the blower fan 17. A cylindrical intake port 18 is provided on the left side of the main body housing 11. When the blower fan 17 is rotated in the counterclockwise direction in FIG. 2 by the activation of the electric motor 12, outside air is sucked from the air inlet 18, and is blown radially from the blower fan 17 and blown to the inner surface of the main body housing 11. Thus, a swirling flow in the counterclockwise direction indicated by the arrow in FIG.

A nozzle 20 for an anchor hole is attached to the air blowing port 13. The nozzle 20 is manufactured by molding a synthetic resin. As shown in FIGS. 1, 2, and 5, the nozzle 20 has a loose, generally tapered cylindrical shape with a small diameter on the tip side. The tip of the nozzle 20 is a blowout port 20a. As shown in the figure, the outlet 20a is inclined and sharpened as if it was cut off obliquely, and is easily inserted into a small-diameter hole such as the anchor hole CH. The rear end of the nozzle 20 is an attachment port 20 c for the blower port 13 of the main body 10. The mounting opening 20c has the largest diameter. Protrusions 20d and 20d for retaining are provided on the left and right side portions of the mounting opening 20c.
When the attachment port 20c is inserted into the blower port 13 of the main body 10 and rotated around a certain angle axis, the projections 20d and 20d are attached in a state of being engaged with the blower port 13 in the removal direction. Thereby, inadvertent drop-off of the nozzle 20 from the air outlet 13 is prevented. As shown in FIGS. 1 and 3, an arrow 13 a indicating the mounting direction of the nozzle 20 is displayed on the side of the air blowing port 13. The nozzle 20 can be removed from the main body 10 by rotating the attached nozzle 20 in the direction opposite to the arrow 13 a and pulling it out from the air blowing port 13.
In the middle of the nozzle 20 in the longitudinal direction, a bellows-shaped swinging portion 20b is provided. The swinging portion 20b is also formed at the same time as the nozzle 20 is formed. The nozzle 20 can change the direction of the blowout port 20a on the distal end side in an arbitrary direction with respect to the attachment port 20c side by the swinging portion 20b.
Between the swinging portion 20b and the attachment port 20c in the longitudinal direction, there are a plurality of means (scattering suppression means) on the side portion of the nozzle 20 as means (scattering suppression means) for suppressing scattering of dust and the like mainly to the worker M side. Small holes 21 to 21 are provided. Each small hole 21 is a through hole having a diameter slightly larger than that of the outlet 20a. In the present embodiment, a total of six small holes 21 to 21 having a diameter of 10 mm are arranged at six equal circumferential positions on the same circumference. Yes.

FIG. 6 shows an operation of removing dust and the like accumulated in the anchor hole CH of the concrete slab C using the blower 1 configured as described above. The worker M holds the handle portion 15 with one hand and inserts the outlet 20a of the nozzle 20 into the anchor hole CH. By operating the switch lever 15a while the air outlet 20a is inserted into the anchor hole CH, a large amount of air is blown from the air outlet 20a. Dust and the like in the anchor hole CH are blown upward by the wind blown from the blowout port 20a.
Six small holes 21 to 21 are provided on the side of the nozzle 20 along the same circumference. A part of the wind blown out from the air blowing port 13 of the main body 10 is blown out laterally from the small holes 21 to 21. A wind is blown sideways (radial direction) from six small holes 21 to 21 arranged at six equal positions on the same circumference on the side of the nozzle 20, so that a circle is formed around the nozzle 20. A plate-shaped air curtain 22 is generated. Dust or the like blown upward from the anchor hole CH is blocked by the air curtain 22 and is difficult to blow up to the worker M side.

According to the blower 1 of the present embodiment configured as described above, the nozzle 20 is provided with small holes 21 to 21 for generating the air curtain 22. The air curtain 22 makes it difficult for the worker M to blow dust or the like blown up from the anchor hole CH. From this, the worker M can perform the dust removal operation in an easy posture without taking a cramped posture in order to avoid the dust blowing up as in the conventional case. Thereby, the usability of the blower 1 can be improved, and as a result, the workability of the dust removing operation can be improved.
Moreover, by providing the small holes 21 to 21 in the side portion of the nozzle 20, it is possible to reduce the pressure loss due to the outlet 20 a, thereby reducing the load on the electric motor 12 and improving the durability. Can do.

Various modifications can be made to the embodiment described above. For example, although the nozzle 20 for the anchor hole CH of the concrete slab C has been exemplified, the small holes 21 to 21 exemplified also for the nozzle used for dust removal work in other small diameter holes such as holes provided on the wall surface and holes provided on the wood. By providing 21, the same effect can be obtained.
Moreover, although it was the side part of the nozzle 20, Comprising: Although the structure which provided the six small holes 21-21 as a scattering suppression means on the same periphery was illustrated, a small or more small hole than this is provided, and a scattering suppression means It can be. Further, as the scattering suppression means, a plurality of small holes may be provided along a plurality of circumferences.
Moreover, although the nozzle 20 removable from the main body 10 was illustrated, the same effect can be acquired by providing the small holes 21-21 illustrated also about the nozzle which cannot be removed and was integrally provided in the main body 10 side. .
Furthermore, although the several small holes 21-21 were illustrated as a scattering suppression means, it can replace with this and an umbrella part or a shielding board part can be provided in the side part of a nozzle. By projecting the umbrella portion or the shielding plate portion around the nozzle, it is possible to make it difficult for dust or the like scattered from the nozzle tip side to be sprayed to the operator side. Thus, the same effect can be obtained also by using the scattering suppressing means other than the air curtain.

DESCRIPTION OF SYMBOLS 1 ... Blower 10 ... Main body 11 ... Main body housing, 11a ... Leg part 12 ... Electric motor 13 ... Blower 15 ... Handle part 15a ... Switch lever, 15b ... Lock button, 15c ... Leg part 16 ... Power cord 20 ... Nozzle 20a ... Air outlet, 20b ... swinging portion, 20c ... mounting port 21 ... small hole 22 ... air curtain (scattering suppression means)
C: Concrete slab, CH ... Anchor hole M ... Worker

Claims (4)

A blower having a main body with a blower fan and a nozzle that can be mounted on a blower port provided in the main body, in order to suppress dust scattering due to wind from a blowout port provided at the tip of the nozzle. Blower equipped with a means to suppress splashing. The blower according to claim 1, wherein a small hole is provided in a side portion of the nozzle as the scattering suppression means. The blower according to claim 1 or 2, wherein the nozzle is made of synthetic resin, and includes a swinging portion for changing a blowing direction between the blowing port and an attachment port with respect to the main body, A blower provided with the small hole in a side portion between the swinging portion and the attachment port. A nozzle that can be attached to a blower air outlet, and has a small hole for blowing air to the side, separately from the air outlet provided at the tip of the nozzle.

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