JP5622987B2 - Finishing material removal method - Google Patents

Description

  The present invention relates to a finishing material removal method. In detail, it is related with the finishing material removal method which removes the mortar layer provided in the surface of the reinforced concrete frame.

Conventionally, a mortar layer is often provided on the surface of a reinforced concrete wall as the groundwork for painting or cloth application. However, when finishing repair work or seismic reinforcement work, this mortar layer is removed.
Specifically, the mortar layer is removed by hitting and destroying the mortar layer with an impact tool such as a chipper or a hammer drill.

However, in this method, noise, vibration, and dust are generated when hitting the mortar layer, so that the work environment becomes severe and the work efficiency is low.
Further, the wall surface after the mortar layer has been removed has damage such as hitting marks and cracks caused by the hitting tool, resulting in a structural problem.

Therefore, a method has been proposed in which a mortar layer is peeled from a concrete surface by making a hole in the mortar layer and applying a force to widen the hole with a peeling device (see Patent Document 1).
According to this method, no damage is applied to the mortar layer, so that damage to the housing surface can be suppressed and generation of vibration, noise, and dust can be suppressed.

JP 2002-70330 A

  However, with the method disclosed in Patent Document 1, it has been difficult to reliably remove only the object to be removed. That is, since the adhesive force and strength of the mortar layer are not uniform, when the hole is expanded by the peeling device, the portion that is not the object of removal may be peeled off.

  An object of this invention is to provide the finishing material removal method which can remove reliably only the part of removal target of finishing material.

The finishing material removal method according to claim 1 is a finishing material removal method for removing a finishing material attached to a housing surface, wherein at least a part of the finishing material is to be removed, and the removal object and the peripheral edge The boundary with the part is a rectangular shape composed of two sides extending in a substantially horizontal direction and two sides extending in a substantially vertical direction. A slit is formed except for one of the four sides of the boundary , and the removed 1 A hole is formed only at substantially the center of the side, and the removal target is removed by applying a force so as to expand the hole.

In the present invention, it is preferable that the casing is a reinforced concrete wall, and the finishing material is a mortar layer applied to a wall surface .

According to this invention, the edge of a removal object and a peripheral part is cut by forming a slit along the boundary of the removal object and the peripheral part of this removal object.
Then, a hole is formed at a predetermined position on a part of the remaining boundary, a tool is inserted into the hole, and a force is applied to expand the hole. Then, the applied force acts so as to shift the removal object from the surface of the housing by taking a reaction force on the peripheral edge. Thereby, the removal object is removed from the housing surface.

  Therefore, since the removal target can be removed only by slit forming work, drilling work, and hole expanding work without hitting as in the conventional case, generation of vibration, noise, and dust can be suppressed. Moreover, since damage is not applied to the removal target, damage to the surface of the housing can be suppressed.

  Moreover, since the slit was formed in the boundary of a removal object and a peripheral part, and the part which is removal object and the part which is not removal object were isolate | separated, only the part of removal object can be removed reliably.

The finishing material removal method according to claim 2 is a finishing material removal method for removing the finishing material attached to the surface of the housing, wherein at least a part of the finishing material is to be removed, and the removal object and the removal The boundary with the peripheral part of the object is a rectangular shape composed of two sides extending in a substantially horizontal direction and two sides extending in a substantially vertical direction, and the removal target is divided into a plurality of removal parts arranged in the horizontal direction, and specified. A slit is formed along the side of the removed site, except for the side adjacent to the next removed site, and a hole is formed only at the approximate center of the removed side, and a force is applied to expand the hole. The operation of removing the specific removal site is repeated for each removal site in order from one end side.

  According to the present invention, it is possible to reliably remove a removal object extending in a substantially horizontal direction while suppressing generation of vibration, noise, and dust.

The finishing material removal method according to claim 3 is a finishing material removal method for removing the finishing material attached to the surface of the housing, wherein at least a part of the finishing material is to be removed, and the removal object and the removal The boundary with the peripheral edge of the object is a rectangular shape composed of two sides extending in a substantially horizontal direction and two sides extending in a substantially vertical direction, and the removal object is divided into a plurality of removal sites arranged in a horizontal direction, A slit is formed along two sides extending in a substantially horizontal direction to be removed and one side extending in a substantially vertical direction on one end side, and for a specific removal site, only at the approximate center of the side adjacent to the next removal site. The operation of forming a hole and removing the specific removal site by applying a force so as to expand the hole is repeated for each removal site in order from one end side.

According to the present invention, it is possible to reliably remove a removal object extending in a substantially horizontal direction while suppressing generation of vibration, noise, and dust.
In addition, since the slit forming operation is first completed, and thereafter the drilling operation and the hole expansion operation are repeated, the number of work steps can be reduced, and therefore the removal operation can be performed quickly.

  According to the present invention, since the removal target can be removed only by slit forming work, drilling work, and hole expanding work without hitting as in the conventional case, generation of vibration, noise, and dust can be suppressed. Moreover, since damage is not applied to the removal target, damage to the surface of the housing can be suppressed.

It is a front view of the wall where the finishing material removal method concerning a 1st embodiment of the present invention is applied. It is a front view of the wall for demonstrating the finishing material removal method which concerns on the said embodiment. It is sectional drawing of the wall for demonstrating the finishing material removal method which concerns on the said embodiment. It is a front view of the wall to which the finishing material removal method which concerns on 2nd Embodiment of this invention is applied. It is a front view of the wall for demonstrating the finishing material removal method which concerns on the said embodiment. It is a front view of the wall for demonstrating the finishing material removal method which concerns on 3rd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description of the embodiments, the same constituent elements are denoted by the same reference numerals, and the description thereof is omitted or simplified.
[First Embodiment]
FIG. 1 is a front view of a wall 10 of a building 1 to which a finishing material removal method according to a first embodiment of the present invention is applied.
The building 1 is made of reinforced concrete, and the wall 10 as a frame of the building 1 has a rectangular shape surrounded by beams 2 and columns 3.
On the surface of the wall 10, mortar is applied to form a mortar layer 20 as a finishing material.

The mortar layer 20 is removed, and the removal is performed according to the following procedure.
The boundary between the mortar layer 20 as the removal target and the beam 2 and the pillar 3 as the peripheral edge around the removal target has two sides 21 and 23 extending in a substantially horizontal direction and two sides 22 and 24 extending in a substantially vertical direction. Is a rectangular shape.

First, as shown to Fig.2 (a) and FIG.3 (a), slit 31 is formed along the sides 21-23 except the side 24 among the four sides 21-24 using cutting tools, such as a concrete cutter. To do. Further, using a drilling tool such as a core drill, a hole 32 is formed in the approximate center of the removed side 24.
Next, as shown in FIGS. 2B and 3B, an expansion tool 33 is prepared, and the tool 33 is inserted into the hole 32 and a force is applied so as to expand the hole 32.

  Here, as shown in FIG. 3B, the expansion tool 33 includes a cylindrical tube portion 331 and a rod body 332 inserted into the tube portion 331. The cylindrical portion 331 has an inner diameter that becomes narrower toward the tip, and a plurality of slits are formed on the tip side. The outer diameter of the rod body 332 is larger than the inner diameter on the distal end side of the cylindrical portion 331, but smaller than the inner diameter on the proximal end side of the cylindrical portion 331.

  The distal end of the extension tool 33 is inserted into the hole 32, and in this state, a hammer is applied to the proximal end side of the rod body 332 to insert the rod body 332 deeply into the cylindrical portion 331. Then, it is pushed by the rod body 332, the tip end side of the cylindrical portion 331 is expanded, and a force is applied in the direction of expanding the hole 32.

According to this embodiment, there are the following effects.
(1) The edges of the mortar layer 20, the beam 2 and the column 3 are cut by forming the slits 31 along the sides 21 to 23 which are the boundaries between the mortar layer 20 and the beam 2 and the column 3.
Then, a hole 32 is formed in the approximate center of the remaining side 24, and a tool 33 is inserted into the hole 32 to apply a force so as to expand the hole 32. Then, the applied force acts as a reaction force on the beam 2 and the column 3 to shift the mortar layer 20 from the surface of the wall 10. Thereby, the mortar layer 20 is removed from the surface of the wall 10.

  Therefore, since the removal target can be removed only by slit forming work, drilling work, and hole expanding work without hitting as in the conventional case, generation of vibration, noise, and dust can be suppressed. Further, since the mortar layer 20 is not hit, damage to the surface of the wall 10 can be suppressed.

  Since the slits 31 are formed in the sides 21 to 23 that are the boundaries between the mortar layer 20 that is the removal target and the beams 2 and the pillars 3 that are not the removal target, the part that is the removal target and the part that is not the removal target are separated. Only the part to be removed can be removed reliably.

[Second Embodiment]
FIG. 4 is a front view of the wall 10A of the building 1 to which the finishing material removal method according to the second embodiment of the present invention is applied.
In this embodiment, since the span of the pillar 3 is long, the wall 10A is long in the horizontal direction, and the point that the mortar layer 40 is removed in a plurality of times is different from the first embodiment.
That is, the mortar layer 40 has a rectangular shape that is long in the horizontal direction.

Therefore, the mortar layer 40 to be removed is divided into three in the horizontal direction and removed in three steps according to the following procedure.
The boundary between the mortar layer 40 as the removal target and the beam 2 and the column 3 as the peripheral edge around the removal target has two sides 41 and 43 extending in a substantially horizontal direction and two sides 42 and 44 extending in a substantially vertical direction. Is a rectangular shape.

  Here, the mortar layer 40 is divided into three removal sites 40A, 40B, and 40C arranged in the horizontal direction. Thus, the side 41 is divided into three parts 411, 412, and 413, and the side 42 is divided into three parts 421, 422, and 423. Further, the boundaries between the removed parts 40 </ b> A to 40 </ b> C are referred to as sides 45 and 46.

First, as shown to Fig.5 (a), about the removal site | part 40A located in the one end side of the mortar layer 40, except the edge | side 45 adjacent to the next removal site | part 40B, it is slit along 3 sides 411, 42, and 431. 51 is formed. Further, a hole 52 is formed in the approximate center of the removed side 45.
Next, the above-described expansion tool 33 is inserted into the hole 52, and a force is applied to expand the hole 52, thereby removing the removal portion 40A.
These operations are repeated in order for the removal sites 40B and 40C as shown in FIGS. 5 (b) and 5 (c).

According to this embodiment, there are the following effects.
(2) The mortar layer 40 extending in a substantially horizontal direction can be reliably removed while suppressing generation of vibration, noise, and dust.

[Third Embodiment]
In the present embodiment, the mortar layer 40 is removed in three steps in the same manner as in the second embodiment, but differs from the second embodiment in that all slits are formed first.

  First, as shown in FIG. 6A, slits 51 are formed along the three sides 41, 42, and 43 of the mortar layer 40.

Next, about removal site | part 40A, the hole 52 is formed in the approximate center of the edge | side 45 adjacent to the next removal site | part 40B, the expansion tool 33 is inserted in this hole 52, and force is applied so that the hole 52 may be expanded. The removal site 40A is removed.
These operations are repeated in order for the removal sites 40B and 40C as shown in FIGS. 6 (b) and 6 (c).

According to this embodiment, there are the following effects.
(2) The mortar layer 40 extending in a substantially horizontal direction can be reliably removed while suppressing generation of vibration, noise, and dust.
In addition, since the slit forming operation is first completed, and thereafter the drilling operation and the hole expansion operation are repeated, the number of work steps can be reduced, and therefore the removal operation can be performed quickly.

  It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.

  For example, in the first embodiment described above, the mortar layer 20 is removed at a time, and in the second and third embodiments, the mortar layer 20 is removed by dividing it into three in the horizontal direction, but this is not restrictive. For example, in addition to dividing the mortar layer 20 in the horizontal direction, the mortar layer 20 may be divided into a plurality of parts in the vertical direction and removed.

  Further, in each of the above-described embodiments, the slit 31 is formed using a cutting tool such as a concrete cutter. However, in practice, the concrete cutter cannot be put into the corners of the beam 2 and the column 3, and the slit 31 May be formed closer to the inner side than the corners, and a part of the mortar layer may remain. In this case, most of the mortar layer 20 may be removed by the finishing material removing method of the present invention, and then the remaining mortar layer may be scraped off with a cutting tool such as a grinder.

  Moreover, when forming the slit 31, forming the hole 32, and expanding the hole 32, water or foam may be supplied to the work location, and dust generated at the work location may be collected by the dust collector. . In this way, dust can be prevented from scattering around.

1 ... Building 2 ... Beam (periphery)
3 ... Pillar (periphery)
10, 10A ... Wall (frame)
20, 40 ... Mortar layer (finishing material)
21, 22, 23, 24, 41, 42, 43, 44, 45, 46 ... sides 411, 412, 413, 431, 432, 433 ... divided sides 31, 51 ... slits 32, 52 ... holes 33 ... expansion tools 40A, 40B, 40C Removal part 331 ... Tube part 332 ... Rod

Claims (3)

A finishing material removal method for removing the finishing material attached to the surface of the housing,
At least a part of the finishing material is to be removed,
The boundary between the removal object and the peripheral edge is a rectangular shape composed of two sides extending in a substantially horizontal direction and two sides extending in a substantially vertical direction,
A slit is formed except for one side of the four sides of the boundary, and a hole is formed only in the approximate center of the removed one side.
A finishing material removing method, wherein a force is applied so as to expand the hole and the removal object is removed . A finishing material removal method for removing the finishing material attached to the surface of the housing,
At least a part of the finishing material is to be removed,
The boundary between the removal object and the peripheral edge of the removal object is a rectangular shape composed of two sides extending in a substantially horizontal direction and two sides extending in a substantially vertical direction,
The removal object is divided into a plurality of removal parts arranged in the horizontal direction,
A slit is formed along the side of a specific removal site except for the side adjacent to the next removal site, and a hole is formed only at the approximate center of the removed side, and force is applied to expand the hole. The finishing material removing method is characterized in that the operation of removing the specific removal site is repeated for each removal site in order from one end side. A finishing material removal method for removing the finishing material attached to the surface of the housing,
At least a part of the finishing material is to be removed,
The boundary between the removal object and the peripheral edge of the removal object is a rectangular shape composed of two sides extending in a substantially horizontal direction and two sides extending in a substantially vertical direction,
The removal object is divided into a plurality of removal parts arranged in the horizontal direction,
A slit is formed along two sides extending in a substantially horizontal direction to be removed and one side extending in a substantially vertical direction on one end side,
For a specific removal site, form a hole only in the approximate center of the side adjacent to the next removal site, and remove each of the specific removal sites by applying force to expand the hole. Finishing material removal method characterized by repeating about site | part.

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