JPH0227116B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a wall surface grinding device that can suitably prevent the scattering of dust generated when grinding a surface to be ground such as a concrete or painted surface.

"Conventional technology" When conventionally grinding a surface to be ground such as a wall of a building for the purpose of leveling, removing paint, polishing, etc., the dust generated by the grinding varies depending on the constituent material of the wall. For example, it is difficult to treat grinding waste of concrete, mortar, stone, glass, brick, tile, paint film, etc. in the same way because they have different properties. Therefore, in order to prevent the dust generated during grinding from scattering into the atmosphere, conventional methods have been used to cover the grinding work area with a dust cover, etc., or to suction the dust using a vacuum. There is.

"Problems to be solved by the invention" However, in these conventional technologies,
The scope of grinding work is limited, the dust scattering prevention effect is insufficient, and there are many types of dust generated from the surface to be ground, so there are problems such as requiring a large amount of effort to deal with it. .

The present invention aims to effectively solve these conventional problems and achieve the following objects.

(a) To expand the scope of grinding work and improve work efficiency, (b) To reliably capture dust generated by grinding,
(c) There are fewer restrictions due to the material of the object to be ground; (d) There is less noise generation.

"Means for Solving the Problems" In order to achieve such an object, the present invention provides a bowl-shaped rotating body that is rotationally driven at the tip of the support structure, and a rotary bowl-shaped body that is rotatably driven at the tip of the support structure. A cutter for grinding a wall surface is fixedly installed, and a cover surrounding the bowl-shaped rotating body at a distance is integrally provided with a support structure, and water is poured into the cover so as to face the bowl-shaped rotating body. It is characterized in that a nozzle is provided and a plurality of through holes are bored in the bowl-shaped rotating body to communicate the inside and outside of the body.

``Function'' With this technical configuration, the surface to be ground is ground by the rotating cutter, the dust generated by the grinding is trapped inside the cover, and when water is poured into the cover, the dust is trapped inside the cover. When water hits the surface of a bowl-shaped rotating body and bounces off, it becomes water droplets.
Water attached to the surface is dispersed in various directions by centrifugal force as it rotates, turning into small water droplets and mist, which fills the hollow space between the bowl-shaped rotating body and the cover and removes scattered dust. At the same time, water droplets and the like adhere to the large grinding debris and are washed away with water.

In addition, as the cutter rotates, grinding waste, dust,
Water in the vicinity is blown outward by centrifugal force, which tends to create a reduced pressure atmosphere inside the rotating bowl-shaped body, and the multiple through holes coincide with the water injection flow depending on the rotational position of the rotating bowl-shaped body. Based on this, a portion of the mist water or the injected water is taken in through the through hole, and water is supplied to the inside of the grinding location of the cutter.

On the other hand, based on the curved shape of the bowl-shaped rotating body, elastic deformability is imparted to that portion, and the cutter is brought into elastic contact with the surface to be ground, thereby suppressing the occurrence of uneven rotation due to unevenness of the surface to be ground.

``Example'' Hereinafter, an example of the present invention will be described based on the drawings. Figures 1 to 3 are examples of a wall grinding device directly related to the present invention, and Figures 4 to 6 are examples of a wall grinding device directly related to the present invention.
The figure shows an example of a filter that is connected to a wall grinding device.

First, to explain the wall surface grinding device, a bowl-shaped rotary body 2 that is rotationally driven is provided at the tip of a support structure 1, and a wall surface grinding cutter 3 is fixedly installed at the edge of the bowl-shaped rotary body 2. At the same time, a cover 4 integrated with the support structure 1 is disposed around the bowl-shaped rotating body 2, and a water injection nozzle 5 facing the bowl-shaped rotating body 2 is provided on the cover 4. The support structure 1 has a structure in which a plurality of through holes 6 are formed to communicate the inside and outside of the support structure 1, and the support structure 1 also includes a rotation source for transmitting the rotation of a drive source 7 such as a motor to the bowl-shaped rotating body 2. A transmission mechanism 8 is provided, and this rotation source transmission mechanism 8 is composed of, for example, a belt 9, a pulley 10, a rotating shaft 11, etc., and the cover 4
is made of a highly flexible material, such as transparent or semi-transparent rubber, in order to be brought into close contact with the surface to be ground 12, and the water injection nozzle 5 has a water injection hose 14 connected to a water supply source 13 such as a water supply, for example. In addition, a drain port 15 is provided at the edge of the cover 4, and the inside of the cover 4 is drained by a drain hose 16 that communicates with the drain port 15, and a drain pump 17 that is provided as necessary. It is becoming more and more like this. Note that the reference numeral 18 in the figure is a support such as an attachment band for integrating the support structure 1, the water injection hose 14, and the drainage hose 16.

According to the wall grinding device having such a structure, the water spouted from the water injection nozzle 5 hits the surface of the bowl-shaped rotating body 2 and bounces off, and the water adhering to the surface is rotated and moved in various directions by centrifugal force. Scattered, in the hollow part between the bowl-shaped rotating body 2 and the cover 4,
Small water droplets and a mist of supersaturated water vapor diffuse and fill the air, and some of the water
It flows down along the surface of the bowl-shaped rotating body 2 or the inner surface of the cover 4.

Therefore, by grinding the ground surface 12 with the cutter 3, the dust scattered in the hollow space between the bowl-shaped rotating body 2 and the cover 4 is removed by water droplets and supersaturated water vapor (mist). As the water is absorbed and taken in by the water, its weight increases and falls, and the falling water washes it and collects on the edge of the cover 4.
5 to the outside.

On the other hand, grinding chips and dust generated as the cutter rotates, as well as water in the vicinity, are blown outward by centrifugal force and adsorbed by water droplets and running water. It is easy for the inside of the unit to become a reduced pressure atmosphere. Then, depending on the rotational position of the bowl-shaped rotating body 2, the direction of the water injection flow from the water injection nozzle 5 matches the through hole 6, so that mist water or water is poured through the through hole 6. A part of the water enters the inside of the bowl-shaped rotary body 4 and is supplied to the inside of the location to be ground by the cutter 3.

In addition, in order to efficiently grind the surface 12 to be ground, it is necessary to press the cutter 3 against the surface 12 to be ground 12 with appropriate contact pressure.
The portion has elastic deformability that makes it easy to elastically deform based on its curved shape, and by maintaining the elastic contact state, the surface to be ground 1
This is to suppress the occurrence of rotational unevenness by allowing some unevenness etc. in 2.

Next, an example of the filter will be described based on FIGS. 4 to 6. The filter includes a cylindrical case 21 in an upright state, a support plate 22 that horizontally partitions the inside of the case 21, and a support plate 22 that horizontally partitions the inside of the case 21. A disk-shaped filter 23 placed on a plate 22, and a plurality of rectifying cylinders 24, 25, 26 placed concentrically on the filter 23.
In addition, the support plate 2
A discharge port 27 is bored in the center of the filter 2.
A drain port 28 that communicates with the discharge port 27 is provided at the center of the tube 3, a shutter 29 (described later) is provided in the outer rectifying tube 24, and a large number of small through holes 30 are provided in the middle rectifying tube 25. Further, the heights of the plurality of rectifier tubes 24, 25, and 26 are set in the order of middle, outer, and inner, as shown in FIG. Then, the shutter 29
As shown in the figures, a slot 31 is provided in the outer rectifying tube 24, and the adjustment door 33 is supported by the mounting frame 32 around the slot 31 so as to be openable and closable. The flow rate passing through the slot 31 is controlled depending on the position. In addition, in FIG. 4, the reference numeral 16 is a drainage hose of the wall surface grinding device.

In a filter having such a configuration, when the fluid to be filtered, that is, the dust-containing water, is sent to the outside of the rectifying tube 24, the filtered water is As the liquid flows as shown by arrow A in Figure 4 and the peripheral edge of the filter 23 becomes clogged, the liquid level outside the rectifier tube 24 gradually rises and exceeds the upper edge of the rectifier tube 24, as shown by the arrow It flows like ro and ha. Next, when the part located outside the central rectifying cylinder 25 becomes clogged, all of the fluid to be filtered passes through the small through hole 30 of the rectifying cylinder 25, and then passes through the filter 23 as shown by arrow D.
It comes to pass through. When the clogging progresses further and the filter 23 becomes completely clogged, the flow goes over the upper edge of the inner rectifying cylinder 26 as shown by the arrow E, and the drain port 28 of the filter 23 and the drain port 27 of the support plate 22 are drained. It will flow down through.

In this way, in order to divide the filter 23 into multiple stages and use it effectively, it is necessary to control the flow rate, but this can be facilitated by using the shutter 29 provided on the outer rectifier cylinder 24. . That is, as shown by the solid line and the chain line in FIG.
It is possible to adjust the flow rate by changing the amount of opening.

It goes without saying that the drainage port 15 described in the embodiments of FIGS. 1 to 3 is provided at a position below when the surface to be ground 12 is in a vertical or inclined state.

"Effects of the Invention" As is clear from the above explanation, according to the present invention,
The following excellent effects can be achieved.

(a) Since the grinding cutter is stored inside the cover and the dust generated during grinding is trapped inside, the grinding area can be moved freely, expanding the scope of grinding work and improving the work efficiency. can improve sex.

(b) Dust generated by grinding can be easily disposed of by reliably mixing it with water and supersaturated steam, capturing it, and discharging it to the outside.

(c) The previous item makes it easier to dispose of scattered dust, so even if the size of the particles of grinding debris generated by grinding varies, they can be captured by running water, water droplets, or mist, and can be removed from walls, etc. There are fewer restrictions due to the material of the object to be ground, and the range of applications can be expanded.

(d) Since the cutter is covered with a cover and grinding is performed in an atmosphere of supersaturated steam, noise generation can be reduced.

(e) The bowl-shaped rotating body has elastic deformability due to its curved shape, so even if the surface to be ground is uneven, the cutter can be pressed against the surface to be ground with appropriate pressure, improving grinding performance. improves.

[Brief explanation of drawings]

1 to 3 show an embodiment of the wall surface grinding device of the present invention, in which FIG. 1 is a partially sectional front view, FIG. 2 is a plan view, FIG. 3 is a bottom view, and FIG. 6 to 6 show an example of a filter connected to a wall grinding device, FIG. 4 is a front sectional view, FIG. 5 is a plan view, and FIG. 6 is an arrow taken along the - line in FIG. This is a perspective view. 1... Support structure, 2... Bowl-shaped rotating body, 3...
Wall grinding cutter, 4...Cover, 5...Water nozzle, 6...Through hole, 7...Drive source, 8...Rotation source transmission mechanism, 9...Belt, 10...Pulley, 1
1... Rotating shaft, 12... Surface to be ground, 13...
... Water supply source, 14 ... Water injection hose, 15 ... Drain port, 16 ... Discharge hose, 17 ... Drain pump,
18... Support tool, 21... Case, 22... Support plate, 23... Filter, 24, 25, 26... Rectifier cylinder, 27... Discharge port, 28... Drain port, 29...
...Shutter, 30...Small through hole, 31...Slot, 32...Mounting frame, 33...Adjustment door, 34
...slanted edges.

Claims (1)

[Claims] 1. A bowl-shaped rotating body 2 that is rotatably driven is provided at the tip of the support structure 1, and a wall grinding cutter 3 is fixed to the edge of the bowl-shaped rotating body 2, and the rotation of the bowl-shaped rotating body 2 is A cover 4 that surrounds this at a distance is provided integrally with the support structure 1, and a water injection nozzle 5 facing the bowl-shaped rotating body 2 is provided on the cover 4. A wall surface grinding device characterized by having a plurality of through holes 6 that communicate the inside and outside of the wall surface grinding device.