JPH01315560A - Peeling method utilizing high-speed vibration and device thereof - Google Patents

Abstract

PURPOSE:To continuously peel off a thermosoftening material in a short time by spraying the hot air to the thermosoftening material covering the base surface of concrete or a metal material to heat and soften it and immediately afterward pushing and propelling an edge tool finely vibrating at a high speed. CONSTITUTION:A peeling unit B with an edge tool 4 finely vibrating at a high speed with the frequency of about 50Hz is fitted to a disk grinder main body A, and a heating unit C feeding the hot air of about 600 deg.C is provided on it. The hot air is sprayed from the heating unit C to a thermosoftening material containing thermoplastic resin covered on the base surface F of concrete or a metal material to heat and soften it. Immediately afterward, the edge tool 4 of the peeling unit B is vibration-excited and pushed and advanced along the base surface to peel off the covered material.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention applies to thermoplastic resins such as acrylic and urethane, paints, rubber, and other heat-softening materials coated on a base surface made of concrete, metal, etc. It relates to a method and device for easily removing coatings, adhesives, etc. formed from buildings, especially buildings,
The present invention relates to a method and device for easily removing synthetic resin tiles, etc. applied to exterior walls of condominiums, bridges, etc., such as painted surfaces, tile surfaces, or floors.

"Prior art and its problems" Exterior buildings with spray-painted or spray-on tiles other than porcelain tiling or ricin coating need to have their exterior walls repainted about 10 years after construction from the viewpoint of building lifespan and aesthetics. Since such exterior materials are made of thermoplastic resins with strong adhesion or hardening power, such as acrylic or urethane, it is difficult to remove them. The reality is that after the treatment, multiple coats are applied.

However, with this type of overcoating method, even if there is deterioration in adhesion or cracking on the concrete base side, it cannot be detected and repaired, and as a result, it is of no use in preventing deterioration in service life. In addition, the adhesion between the coated surface and the cold surface after repeated coatings is insufficient, and due to the difference in thermal expansion coefficient between the two, it is easy to cause 'A#' and cracks due to coating film lifting. have

On the other hand, in order to peel off the exterior materials, etc., there is a method of mechanically peeling it off by applying impact force with a scraper, etc. However, with this method of peeling off using impact force, the impact can damage the underlying concrete. Not only that, but mechanically peeling off once solidified material inevitably leaves unpeeled areas, making it difficult to form an even and smooth surface, and furthermore, such methods require extremely long peeling times. Not only is it long, and the separation work is hard labor and consumes a large amount of cutlery and machinery, but also environmental pollution occurs due to the generation of dust, noise, etc. due to the impact force that causes the peeling.

The same applies when removing resin tiles made of thermoplastic resin such as urethane, especially since such resin tiles are thick. A: The work away from work will take longer.

In view of the shortcomings of the prior art, the present invention provides a thermoplastic or thermosoftening material coated on a base surface such as concrete or metal material, such as the above-mentioned exterior material, thick synthetic resin tile, or even a thin coating film. If so, there is no need to be limited by its type or thickness.
It is an object of the present invention to provide a peeling method and device that can be removed simply and easily in a short time.

Another object of the present invention is to provide a 2+1# method and apparatus that have low noise, do not generate dust, and can save materials.

"A means of trying to solve problems" The present invention aims to achieve this technical problem.

In a method for peeling off a thermosoftening material containing a thermoplastic resin coated on a base surface formed of concrete, metal material, etc., micro high-speed vibrations are applied immediately after the thermoplastic material is heated and softened. A peeling method is proposed, characterized in that the heat-softening material in the heat-softened state is peeled off along the base surface while pressing the cutter forward along the base surface.

In this case, it is preferable to use a die in which the amplitude of the minute high-speed vibration is 0.5 to 51 and the amplitude frequency is 50 Hz or more.

As a device for smoothly realizing the invention, in item 3), the exterior material, the thick synthetic resin tile,
Furthermore, a heat-softening material 90 such as a thin coating film is removed using the cutting tool 4.
When pressed through the rolling bearing 2, the material to be peeled 90 comes into contact with the outer ring circumferential surface of the rolling bearing 2 that performs minute eccentric rotational movement around the shaft 11 on the rear end side, and receives a driving force from the rolling bearing 2.
It has a diaphragm 3 that vibrates at high speed toward the side, and a heating body 6 provided facing the surface to be peeled in front of the diaphragm 3. To provide a peeling device that performs peeling work while moving the cutter 4 forward.

In this case, preferably, elastic force is applied to the vibrating plate 3 to vibrate the cutting tool 4 only during the peeling operation, and the material to be peeled 90
When not pressed, it is in contact with the rolling bearing 2, and the material to be peeled 90
It is preferable that the heating body 6 is configured to be able to come into contact with the rolling bearing 2 against elastic force when pressed, and the heating body 6 is also configured of one or a combination of heat radiation means and hot air generation means, and The surface to be peeled 90 where these are substantially closed
Preferably, a predetermined area of a can be heated.

"Operation" According to this technical means, since the material to be peeled 90 is heated and the surface to be peeled 90a softened by the heating is peeled off, peeling becomes easy and the heating is substantially Since the predetermined area of the closed surface to be peeled 90a is configured to be heated, it is possible to heat it to the softening point in a short time,
Improves work efficiency.

When the diaphragm 3 is pressed against the softened material 90 through the cutter 4, the rear end side comes into contact with the outer ring 24 circumferential surface of the rolling bearing 2, and the diaphragm 3 contacts the outer ring 24 circumferential surface of the rolling bearing 2. Due to the frictional force, only the outer ring 24 is gripped and its rotational movement is stopped, and since only the inner ring 22 is rotating eccentrically, the amount of eccentricity is reduced through the steel balls 23 interposed between them. Only the amplitude corresponding to is transmitted to the outer ring 24 side,
The amplitude is transmitted to the diaphragm 3 together with the outer ring 24.

Therefore, due to the frictional force, the bearing outer ring 24, which is integrated with the diaphragm 3, vibrates back and forth while drawing a gentle sine curve along with the diaphragm 3, resulting in quiet high-speed vibration without any shocking repulsive force. Since the device itself is biased in the pressing direction by the operator, the diaphragm 3 only moves in forward vibration, which greatly improves the efficiency of peeling and cutting, as well as removing concrete and other underlying parts. There is no risk of damage, and as a result, it is possible to cleanly and easily peel off thick tiles such as the softened resin tiles as well as thin films such as paint films.

Also, the reason why the diaphragm 3 has no impact repulsive force is that even if a finger or hand swings against the cutting tool 4 or the diaphragm 3, the finger or hand is soft, so the micro vibration caused by the eccentricity can be absorbed by the finger or the like. However, it is extremely safe and will not cause any cuts to your fingers.

The fact that the diaphragm 3 has no repulsive force and moves only in forward vibration means that even if the film on the side of the material 90 to be peeled is thick, the cutter 4 attached to the tip of the diaphragm 3 can be easily peeled off. The material 90 penetrates into the material 90 and its peeling is facilitated, so it can be peeled off in a short time regardless of the thickness of the material 80 to be peeled, and the material 90 can be removed uniformly without leaving any peeling residue. It becomes possible.

In this state, when the pressing of the diaphragm 3 against the material to be peeled 90 is released via the cutting tool 4, the diaphragm 3 is easily separated by the urging force of the vibration, and the vibration is canceled. In this case, in particular, by applying an elastic force to the diaphragm 3 in the forward direction, the above-mentioned action can be made more reliable.

Furthermore, according to the present invention, when the outer ring 24 of the bearing comes into contact with the diaphragm 3, the outer ring 24
Since the contact resistance between the diaphragm 3 and the diaphragm 3 becomes extremely large, the outer ring 24 does not slide between the diaphragm 3 and is in a relatively stationary state, so there is no risk of wear occurring between the two. The durability due to this is greatly improved, and there is no heat generated due to the sliding motion.

In addition, since a large number of steel balls 23 are interposed between the inner ring 22 and the outer ring 24, the pressing force is dispersed, and the steel balls 23 are held at a predetermined position: d
Since the inner ring 22 does not stand still for 1 hour, but rolls on the circumferential surfaces of the two wheels with minimal resistance, wear on the inner ring 22 side does not occur to the extent that it becomes a problem.

Furthermore, since the rotational torque of the rotating shaft is only the eccentric radius of the inner ring 22, it is small, so a relatively small motor is sufficient, and power consumption can be reduced as well as weight and size reduction.

"Embodiments" Hereinafter, preferred embodiments of the present invention will be described in detail by way of example with reference to the drawings. However, unless otherwise specified, the dimensions, materials, shapes, relative positions, etc. of the components described in this example are not intended to limit the scope of the invention, but are merely illustrative examples. It's nothing more than that.

Figures 1 to 4 show a peeling machine according to an embodiment of the present invention that uses a reprinted disc grinder. A peeling unit B, which will be described later, is provided in a rectangular recessed portion, and a heating unit 2 C, which extends forward, is connected to the recessed portion by screws 19, respectively.

An output shaft 11 connected to a motor (not shown) is suspended from the flat bottom portion, and a rolling bearing 2 is fitted to the tip of the output shaft 11 via an eccentric cylinder 21.

Peeling unit) B includes a frame 1 fixed to the main body A side, an eccentric tube 21, the rolling bearing 2, converting the rotational motion of the rolling bearing 2 into a minute reciprocating motion, and holding a flat cutter 4 at the front end. diaphragm 3, and the rolling bearing 2 and diaphragm 3.
It consists of a cover 5 that hides the lower part of the cover.

As shown in FIG. 2, the frame l is provided with a rolling bearing accommodating portion 18 that expands in a substantially rectangular shape on its bottom side, and a rectangular diaphragm mounting portion 17 on its front side. The diaphragm 3 is positioned so as to be slidable only in the front-rear direction (in the direction of the upper arrow in the figure), with the diaphragm 3 being regulated in position using the thick portions 16 erected on both side walls as guides.

As shown in FIG. 2, the rolling bearing 2 includes an inner ring 22 tightly fitted to the circumferential surface of an eccentric cylinder 21 into which the output shaft 11 is fitted with a slight eccentricity, and an inner ring 22 interposed on the outer periphery of the inner ring 22. The outer ring 24 is rotatably fitted to the inner ring 22 via a large number of steel balls 23, and its diameter is set so that it protrudes from the front end of the outer ring 24 to the rear end position of the mounting portion.

In order to configure the output shaft 11, the eccentric cylinder 21, and the inner ring 22 to be integrally rotatable, they are sandwiched between seats 281 of disc bodies 28a and 28b integrally formed on the output shaft 11 and the eccentric cylinder 21, respectively. I'm wearing it. In this case, the outer ring 24 is naturally in a free state.

The diaphragm 3 has a rectangular flat plate shape, and has a holding portion 31 for holding the cutting tool 4 on its tip side, and its rear end side faces the circumferential surface of the outer ring 24. Further, four semi-cylindrical parts 32.15 are provided at symmetrical positions on the upper surface side of the moving plate 3 and the lower surface side of the frame body 1, and the diaphragm 3 is placed in the cylindrical space formed by the two recesses 32 and 15. Swinging (about 300g)
A compression spring 14 having spring force is inserted.

As a result, the diaphragm 3 can swing only in the direction toward and away from the outer ring 24, and in a steady state, is separated from the outer ring 24 by the biasing force of the compression spring 14, and also moves the material to be peeled 90 through the blade A4. The rolling bearing 2 is pressed against the elastic force.
It can be brought into contact with the outer ring 24 of.

Further, the oscillating surfaces of the frame 1 and the push plate 1a with respect to the diaphragm 3 are coated with fluorotetrachloride resin to reduce the frictional resistance generated between the frame 1 and the diaphragm 3.

On the other hand, the heating unit C is supported by the disc grinder main body A via a spring 51 and a port 52 so as to be able to swing slightly, and has a mounting base 5 extending to a position in front of the cutting tool 4, and a mounting base 5 connected to the mounting base 5 via a shaft. It consists of a unit body 6 that is swingably supported.

The unit main body 6 is formed into a square shape with a length slightly larger than the width of the cutting tool, and has a rectangular cross section in which a motor 61, a fan 62, a punch plate 63, and a large number of small holes 64 are bored in order from the top side. A heat insulating material 65, a planar heater 66 made of nichrome or other material, a porcelain cover plate 67 with a large number of small holes 64, and a brush-like wire assembly 69 surrounding the heat insulating material 65 are attached. The heater and motor 61 are each connected to a power supply section on the main body A side via a coat 68.

Next, the operation of this embodiment will be explained.

First, by energizing the motor 61 and the heater on the side of the heating unit C, hot air is blown toward the surface to be peeled 90a. At this time, since the space between the unit main body 6 and the surface to be peeled 90a is surrounded by the brush-shaped wire assembly 68, the hot air circulates within the closed space 70 and gradually escapes to the outside while touching the surface to be peeled 90a. Heat and soften. During this time, the peeled surface 90a around the closed space 70 is also preheated.

Then, by gradually pressing the cutter 4 on the side of the peeling unit (B) along the heated and softened surface 90a, the diaphragm 3 integrated with the cutter 4 is moved to the rear end side of the outer ring of the rolling bearing 2. 24 circumferential surface, and only the outer ring 24 is gripped by the frictional force with the outer ring 24 circumferential surface of the diaphragm 3 and its rotational movement is stopped, and only the inner ring 22 side is rotating eccentrically. , only the amplitude corresponding to the amount of eccentricity is transmitted to the outer ring 24 side through the steel ball 23 interposed therebetween, and the amplitude is transmitted to the diaphragm 3 together with the outer ring 24, and as a result, the cutter 4 moves at a very high speed. A predetermined peeling operation is performed by penetrating into the material to be peeled 90 which has been softened by the forward movement caused by the vibration. Then, as the cutting tool 4 moves forward, the heating unit C heats the surface Boa to be peeled at the front position one after another, so that a predetermined peeling operation is performed continuously.

In order to confirm the above effect, the present inventors conducted the following.

We conducted a peeling experiment on the exterior wall material of an apartment building that was finished with stucco using acrylic spray material. It should be noted that the above-mentioned spraying was carried out in a place where the thickness of the material was 1 to 3 cm, the base was concrete, and it had already been 10 years since construction.

First, to explain the component configuration of the peeling unit B side, the cutter 4 is made of tool steel with a wall thickness of 1 mm and a blade width of 801 mm, and the motor (not shown) built into the main body A side is , power consumption is 550W and 3000~+300
The amplitude of the cutting tool 4 can be changed continuously up to 0 rpm, and the eccentricity of the rolling bearing 2 can be changed by replacing the eccentric cylinder 22.
, 5, 1, 5, 3, 0, 5mm.

On the other hand, on the processing (M unit) C side, the air volume of the fan 62 is set to 200 to 300 blows/min, the power consumption of the nichrome wire forming the plane heater 66 is set to 1500 -, and the hot air temperature on the surface to be peeled is 600 ° C. Set it so that it is before or after.

Using an apparatus under such conditions, firstly,
Hz) When the amplitude is set to 0.5 mm, ■ the rotation speed is set to 1000Orp* (the frequency of the cutter 4 is 150-18
0 Hz) for each case when the amplitude was set to 1.5 m1t.

When the stripping work was carried out at a forward speed of 3 m/win, the sprayed material could be easily and completely removed.

Next, change the rotation speed to QOOOrp (frequency 1 of cutter 4)
00 Hz) When the amplitude was set between 3.0 layers, some shock waves were felt on the cutting tool 4, but 2+w/a
+: Spraying could remove material at a forward speed of n. Therefore, under these conditions, when peeling an FJ film coated on a highly hard substrate such as a metal material, it is expected that bounce will occur and peeling will become difficult.

When the rotational speed was lowered to 3,000 rpm (frequency of the cutter 4: 50 Hz), the shock wave disappeared, but the peeling speed decreased somewhat in the thick portion. Therefore, it is expected that it will be difficult to peel thicker thermoplastic resin under these conditions.

Furthermore, when the rotational speed remains at 800 rpm (frequency of the cutter 4 is 100 Hz) and the amplitude is set to 5.0 as, the cutter 4 bounces at a forward speed of 2+s/+sin and advances at 1 fold/win. Even at this speed, the spraying could not remove the material smoothly. When the rotational speed was lowered to 300 rpm and the angle at which the cutter 4 was pressed was made to be flat so as not to bounce, it was possible to peel off at a forward speed of 2 m/win in a thin area with a film thickness of about III.

``Effects of the Invention'' As described above, the present invention allows the cutting tool to be moved forward at minute speeds at a small speed while the exterior material, thick-walled resin tiles, and even thin coating films are softened, and instead of using impact force. Since the peeling operation is simple and easy, the material to be peeled can be removed continuously and in a short time without being limited by the thickness or type of the material to be peeled.

In particular, according to the device invention described in claim 3), since vibrations are transmitted while the outer ring and the diaphragm are stationary, there is no risk of wear between them, and durability can be greatly improved. At the same time, it produces low noise and does not generate dust, and even if the outer ring is stationary, the inner ring can rotate independently of it, so the motor's load resistance does not increase and power can be saved. Furthermore, as described above, since vibrations are transmitted while the outer ring and the diaphragm are stationary, no impactive repulsive force is generated, and safety can be improved.

It has various effects such as

[Brief explanation of the drawing]

1 to 4 show a peeling machine according to an embodiment of the present invention attached to a known disc grinder, in which FIG. 1 is a front sectional view of the main part, FIG. 2 is a plan view of the main part, and FIG. The entire front view and FIG. 4 are partially cutaway plan views.

Claims (1)

[Claims] 1) In a method for peeling off a thermoplastic material containing a thermoplastic resin coated on a base surface formed of concrete, metal, etc., immediately after the thermoplastic material is heated and softened,
A peeling method characterized in that the heat-softening material in a heat-softened state is peeled off along the base surface while pressing a cutting tool energized by minute high-speed vibrations along the base surface. 2) The peeling method according to claim 1, wherein the amplitude of the minute high-speed vibration is 0.5 to 5 mm and the amplitude frequency is 50 Hz or more. 3) When a material to be peeled made of a thermosoftening material containing a thermoplastic resin is pressed through a cutting tool, the material comes into contact with the outer ring circumferential surface of a rolling bearing that performs minute eccentric rotational movement around the shaft on the rear end side, It has a diaphragm that receives driving force from the rolling bearing and vibrates at high speed toward the material to be peeled, and a heating element disposed facing the surface to be peeled in front of the diaphragm, and is heated by the heating element. A peeling device characterized in that a peeling operation is performed while moving the cutting tool forward along a surface to be peeled. 4) directly or indirectly applying an elastic force to the diaphragm;
4. The peeling device according to claim 3, wherein the peeling device is configured to be able to separate from the rolling bearing when the material to be peeled is not pressed, and to come into contact with the rolling bearing against elastic force when the material to be peeled is pressed. 5) Claim 3, wherein the heating body is constituted by one or a combination of a heat radiating means and a hot air generating means, and is capable of heating a predetermined area of a substantially closed surface to be peeled. ) or the peeling device described in 4).