Nozzle with brush

Abstract

To provide a nozzle with a brush which effectively removes powder dust remaining in a hole after concrete drilling by a hammer drill using suction force of a dust collector or discharge force of an air blower, and is usable and is excellent in durability even when a concrete hole is thin.SOLUTION: A nozzle with a brush is composed of a cylindrical nozzle body which has a brush arranged in the peripheral wall of a tip end and a connection part for being connected to a dust collector or an air blower, wherein the connection part is rotatably connected to an intake / exhaust hose, the brush has a plurality of through holes provided in a chord direction of a circumferential wall of a vertical cross section in the longitudinal direction of the nozzle body, the bundles of resins or steel wires as a base material of the brush are made to pass through the through holes, the bundles are abutted and cut into an arbitrary length from the outer wall surface of the nozzle body to form a brush, and the brushes are formed in a plurality of stages in the longitudinal direction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a cleaning tool (nozzle with brush) for effectively removing dust from inside a hole after drilling concrete during the installation of an adhesive anchor or a resin anchor (hereinafter referred to as adhesive anchor) at a construction site, by using the suction force of a dust collector or the discharge force of a blower. [Background technology]

[0002] When installing adhesive anchors at building or civil engineering sites, the presence of dust on the wall and bottom of the hole after drilling into the concrete with a hammer drill significantly reduces the pull-out resistance of the anchor bolt. For this reason, it is necessary to remove as much dust as possible from the hole before inserting the anchor fastening resin. Typically, this cleaning method involves using a fan or dust collector to remove the dust from the bottom of the hole, then scraping off the dust adhering to the inner wall with a brush or similar, and then using the fan or dust collector to remove the dust that has been scraped off again.

[0003] The above-mentioned cleaning of the inside of a concrete hole by (1) using a blower and dust collector, (2) brushing, and (3) using a dust collector and blower again requires the same movement of putting things in and taking them out of the hole three times, which takes time and effort. Therefore, there is a demand for an alternative cleaning tool with better work efficiency, and various cleaning tools have been proposed to date. One example is a cleaning tool that combines a suction machine (dust collector) and brushing (see Patent Document 1).

[0004] The cleaning tool disclosed in Patent Document 1 has a main nozzle in the form of a hollow thin tube with a brush attached to the tip, suction holes on the peripheral wall surface of the tip and at the tip, and a connection port at the rear end for connecting to a suction device (dust collector).The cleaning method involves raising and lowering the nozzle while brushing off dust adhering to the inner peripheral wall surface of the hole, and then sucking the dust from the hole into the suction device (dust collector) through the suction hole and the hollow part of the thin tube, thereby removing the dust from the hole.

[0005] As described above, by using this cleaning tool, it is possible to quickly remove dust from inside the hole with simple operations, and the present invention is an improved invention related to the nozzle body of this cleaning tool, and relates to the arrangement of brushes aimed at improving durability.

[0006] The nozzle body of Patent Document 1 has a brush attached by directly implanting it on the outer peripheral wall of the nozzle tip, and various brush-equipped nozzles with different shapes are disclosed, such as those formed with almost no gaps in directions perpendicular to the longitudinal direction and in the longitudinal direction, and those formed with thin tubes radially from the center in the longitudinal direction, in a ring shape, or in a spiral shape.

[0007] Another brush arrangement method has been disclosed in which a groove is formed in the outer wall surface of the nozzle tip and a band-shaped body with a brush planted in the groove is glued or fitted into the groove (see Patent Document 2). [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Utility Model Application Publication No. 4-14180 [Patent Document 2] International Patent Publication WO2007 / 032084 Summary of the Invention [Problem to be solved by the invention]

[0009] When using this cleaning tool to remove dust remaining in a hole after drilling concrete with a hammer drill, the dust adhering to the inner wall of the hole is scraped off with a brush attached to the nozzle, and in this process, large shear stress is generated between the brush and the inner wall of the hole.

[0010] For this reason, the brush needs to have adhesive strength that can withstand this shear stress, but the arrangement disclosed in Patent Document 1, in which the brush is implanted into the outer wall surface of the nozzle tip, and the arrangement disclosed in Patent Document 2, in which a strip is glued or fitted, do not provide sufficient adhesive strength and lack durability, so it was necessary to consider factors such as increases or decreases in friction with the concrete wall surface depending on the amount of force applied during operation, resistance due to air blowing and suction, and clogging with dust.

[0011] Furthermore, the method of embedding brushes into the wall of the nozzle body requires a minimum wall thickness to hold the brushes, so if the concrete hole is narrow, the nozzle space through which the dust passes becomes narrower by the volume occupied by the brush, causing the dust to clog the nozzle and making it impossible to suck and remove the dust with the capacity of a normal dust collector. In other words, it is known that embedding brushes is not suitable for nozzles with narrow pipe diameters. [Means for solving the problem]

[0012] The present invention has been made in consideration of the above problems, and provides a brush-equipped nozzle that has excellent shear stress resistance, durability, and can be used even when the concrete hole is narrow.

[0013] The brush nozzle of the present invention is a nozzle with a brush for effectively removing dust adhering to the inner peripheral surface of a bored concrete hole during installation of an adhesive anchor by utilizing the suction force of a dust collector or the exhaust force of a blower. The brush nozzle is composed of a cylindrical nozzle body (1) with a brush (2) arranged on the peripheral wall of the tip, and a connecting part (3) for connecting the rear end of the nozzle body (1) to a dust collector or a blower (7) via an intake and exhaust hose (4), and the connecting part (3) is rotatably connected to the intake and exhaust hose (4).

[0014] The brush (2) is formed by providing a plurality of through holes (6) in the chord direction of the circumferential wall of the nozzle body (1) in a cross section perpendicular to the longitudinal direction (radial direction), and then passing a bundle of resin or steel wire that will serve as the base material of the brush through the through holes (6), and further protruding the bundle to an arbitrary length from the outer wall surface of the nozzle body (1) and cutting it to form a brush, and the brush formations are arranged in a plurality of stages in the longitudinal direction. [Effects of the Invention]

[0015] In the present invention, the brush base material bundle penetrates the nozzle wall so that the brush acts as a single bundle of wires to withstand shear stress when scraping off dust adhering to the inner wall surface of a concrete hole. Therefore, even if the tip of the brush that comes into contact with the concrete hole bends along the outer wall surface of the nozzle, there is no risk of it coming loose or peeling off, as with the embedded arrangement disclosed in Patent Document 1. Furthermore, it is possible to manufacture a brush nozzle using a thin or thin-walled tube for the nozzle body, making it possible to clean narrow concrete holes.

[0016] Furthermore, although the cleaning efficiency increases as the number of bristles on the brush increases, it also impedes the ventilation of air and dust collection, and increases the likelihood of clogging with dust. However, the brush nozzle of the present invention allows the connecting part (3) to be freely rotated, so even if the number of bristles on the brush is small, it is possible to thoroughly clean the wall surface inside the concrete hole without impeding the ventilation. [Brief explanation of the drawings]

[0017] [Figure 1] Overall view of a cleaning tool equipped with a brush nozzle of the present invention. [Figure 2] FIG. 1 is a reference diagram showing an example of a through hole for arranging a brush in a nozzle body. [Figure 3] FIG. 1 is a reference diagram showing an embodiment of a brush nozzle according to the present invention. [Figure 4] Reference diagram showing an example of a brush nozzle using a thin tube in the nozzle body. [Figure 5] Conceptual diagram of cleaning the inside of a concrete hole using the brush nozzle of the present invention DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 is an overall view of a cleaning tool in which a brush-equipped nozzle body (1) of the present invention is rotatably attached to a dust collector (7) by means of a connector (3) via an intake / exhaust hose (4). Needless to say, this dust collector (7) can also be a blower.

[0019] FIG. 2 is a reference diagram showing an embodiment in which two through holes (6) are provided in parallel in the chord direction of the circumferential wall of the nozzle body (1) in a cross section perpendicular to the longitudinal direction (radial direction) in order to arrange a brush (2) at the tip of the nozzle body (1).

[0020] In the brush nozzle of the present invention, the brush (2) is usually disposed inside the nozzle pipe, so it is desirable to dispose the through hole (6) adjacent to the inner wall surface of the nozzle so as not to obstruct the flow of dust inside the nozzle pipe. However, if the pipe is thick, the through hole (6) may be disposed so as to penetrate the thick part so that the brush (2) does not enter the pipe.

[0021] FIG. 3 is a reference diagram showing one embodiment of the brush nozzle of the present invention, in which two through holes (6) are arranged parallel to each other in the chord direction shown in FIG. 2 above, and a brush (2) is formed (one stage) by passing a bundle of resin or steel wire that serves as the base material of the brush through the through holes (6) and cutting it to a desired length, and this brush formation can be arranged in multiple stages at any desired intervals in the axial direction, and can form any desired angle in the radial direction.

[0022] When the brush (2) shown in Figure 3 above is arranged in multiple stages, the direction (chord direction) of the upper and lower brushes (2) can be changed by changing the number of stages, the interval between stages, the angle of the arc, and the arrow height of the cross section perpendicular to the longitudinal direction (radial direction), so that the through holes (6) can be arranged in any direction and position, and multiple brushes (2) can be arranged in any direction on the outer wall of the nozzle body (1).

[0023] Figure 4 is a reference diagram showing an example of a brush nozzle when a thin tube or soft material is used for the nozzle body (1), and a single bundle of resin or steel wire, which forms the base material of the brush, is fitted into the two through holes (6) shown in Figure 2 above, forming a U-shape on the outer wall surface of the nozzle to form a brush (2), and as in Figure 3 above, this brush is formed in multiple stages at any interval in the axial direction and rotated every 90 degrees in the radial direction. Also, by bonding or welding the U-shaped portion that contacts the outer wall surface of the nozzle with an adhesive, it is possible to increase the strength to the same extent as in the case of Figure 3, even if the nozzle is originally made of a thin tube or soft material and welding is difficult.

[0024] Figure 5 is a conceptual diagram of cleaning the inside of a concrete hole using the brush nozzle of the present invention. The nozzle body (1) is inserted into the concrete hole (5) and raised and lowered to brush off dust adhering to the inner wall of the hole. The dust is then sucked through the suction hole and into the suction device (dust collector) via the hollow part of the thin tube. Even if the concrete hole (5) is narrow and a nozzle with a low bristles (2) like the one shown in Figure 4 is used, dust can still be effectively removed by freely rotating the nozzle at the connection part (3). Figure 5 shows the air flow when a dust collector is connected, but the same effect can be achieved with a blower. [Explanation of symbols]

[0025] 1 Nozzle body 2 Brushes 3 Connection 4 Intake and exhaust hoses 5 Concrete Hole 6 through holes 7 Dust collector (blower) 8 Adhesive part (welded part)

Claims

1. A brush-equipped nozzle for effectively removing dust adhering to the inner surface of a concrete hole during installation of an adhesive anchor by using the suction force of a dust collector or the exhaust force of a blower. The brush nozzle is composed of a cylindrical nozzle body (1) with a brush (2) disposed on the peripheral wall of the tip end thereof, and a connecting part (3) for connecting the rear end of the nozzle body (1) to a dust collector or a blower (7) via an intake / exhaust hose (4). The brush (2) is formed by forming a plurality of through holes (6) in the chord direction of the circumferential wall of the nozzle body (1) in a cross section perpendicular to the longitudinal direction (radial direction), passing a bundle of resin or steel wire that will serve as the base material of the brush through the through holes (6), and then protruding the bundle to an arbitrary length from the outer wall surface of the body (1) and cutting it to form the brush (2), and arranging the brush formations in a plurality of stages in the longitudinal direction.

2. 2. The brush nozzle according to claim 1, wherein the connecting portion (3) is rotatably connected to the intake / exhaust hose (4).

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