JP5181280B2 - How to cut the surface of the skeleton - Google Patents

Description

The present invention relates to a method for cutting out a surface layer portion of a concrete frame such as a wall or a pillar of a building.

When renovating or repairing an existing building, removing tiles attached to the pillar surface or wall surface and constructing a new finish surface, or correcting the mistakes in the column surface or wall surface during the construction phase of the building In such a case, it is necessary to scoop the surface layer portion of the concrete frame that forms the column surface and wall surface.
In that case, it has been common practice to perform the handing work manually using an electric hammer or chipper. However, such manual handing work is not efficient and ensures sufficient construction accuracy. It is difficult and involves a lot of noise, vibration, and generation of a large amount of dust, which is a cumbersome and troublesome operation requiring sufficient construction management.

Therefore, it is desired to automate and mechanize this type of turning work. For example, a turning method as shown in Patent Document 1 has been proposed. In this method, the surface layer portion of the wall surface is cut using a disk-shaped cutter having a diamond tip.
Japanese Patent Laid-Open No. 2000-230311

  Compared with conventional general hammers and chippers, the rolling method shown in Patent Document 1 is more efficient, and is advantageous in terms of noise, vibration, and dust. It is necessary to use a special cutter equipped with a diamond tip for cutting in addition to the diamond tip for cutting, and it is also necessary to open a hole for inserting the cutter in advance. It is not necessarily rational and has not become popular.

In view of the above circumstances, an object of the present invention is to provide a more effective and appropriate method for rolling up a concrete structure by cutting off the surface layer portion thereof.

The method for cutting a surface layer of a frame according to the present invention is a method for cutting a surface of a concrete structure such as a wall or a column of a building by cutting the surface layer in layers, and can cut concrete. A cutting machine having a circular plate-like blade is arranged on the front side of the housing to be worked so as to be movable vertically and horizontally along the surface, and the blade is used to move the surface layer of the housing to be cut from one side to the other. The width dimension corresponding to the radial dimension of the blade on the housing surface layer is obtained by repeating the operation of cutting the cut part while forming the crescent-shaped cut part. after forming the cut groove depth dimension corresponding to the thickness of the surface layer portion to be excised, excised the entire surface portion of the resected by going expand off the kerfs, cut the kerfs Upon going spread, said cuts are expanded cut the bottom portion of the groove in the width direction to form a strip-shaped cut portion, and wherein the take split collectively the cut portion thereafter.

  According to the present invention, it is possible to efficiently cut the surface layer portion of the housing by the blade provided in the cutting machine only by supporting the cutting machine by the support frame and moving it vertically and horizontally on the front side of the work place. It is. Moreover, since a general-purpose wall saw can be diverted as a cutting machine, it is not necessary to use a special cutter as shown in Patent Document 1 or to open a hole for inserting it in advance. Efficient work is possible.

An embodiment of the present invention will be described with reference to FIGS.
In the present embodiment, as shown in FIG. 1, when repairing an existing building composed of a pillar 1 and a beam 2, the surface layer portion of the pillar 1 (the range indicated by a broken line in FIG. 1) is cut out. In this case, the excision work is performed according to the procedure shown in FIGS. 3 to 5 by the excision apparatus 10 arranged on the front side of the work target column 1 as shown in FIG.

  The excision device 10 in this embodiment includes a cutting machine 11 capable of cutting concrete and a support frame 15 for moving the cutting machine 11 vertically and horizontally along the surface of the front side of the pillar 1 to be worked. ing.

The cutting machine 11 cuts the concrete by the outer periphery by rotating the circular plate-like blade 12 at a high speed, and has the same type as a so-called wall saw conventionally used for cutting a concrete surface. It is provided with a drive mechanism 13 for rotating the blade 12 at a high speed and a feed mechanism 14 for feeding the blade 12 in the vertical direction.
In addition, it is common for the blade in the conventional wall saw to be attached in a state in which a flange portion for connecting to the drive motor protrudes to the center portion on the back surface side, but in this embodiment, the back surface of the blade 12 If such a flange protrudes on the side, the cutting operation will be hindered. Therefore, it is necessary to use a flat blade 12 with no flange protruding on the back side.

The support frame 15 includes a pair of left and right support columns 16 standing on both sides of the work target column 1, and a horizontal beam 17 horizontally mounted between the support columns 16.
The column 16 is made of a steel material such as a H-section steel having a small cross section, and its both upper and lower ends and an intermediate portion are supported via brackets 18 so as to be stretched between the upper and lower beams 2 and slightly outside both sides of the column 1. It is arranged and installed upright.
The horizontal beam 17 is made of a steel material such as an angle member, and both the cut portions thereof are detachably connected to the support column 16 via the bracket 19. The horizontal beam 17 is used to fasten the bracket 19 to the support column 16. A large number of bolt holes are formed at equal intervals in the vertical direction, and the horizontal beam 17 can be connected to an arbitrary position of the support column 16, and the connection position can be freely changed in the vertical direction.
A feed rail 20 for smoothly moving the entire cutting machine 11 is installed on the upper surface of the horizontal beam 17, and the cutting machine 11 is guided by the feed rail 20 so as to move horizontally on the horizontal beam 17. It can move freely in any direction.

A specific process of excision work by the excision apparatus 10 having the above configuration will be described with reference to FIGS.
In the present embodiment, first, a notch groove 25 corresponding to the diameter of the blade 12 is first formed in the upper part of the pillar 1, and the entire surface layer portion is cut off by sequentially cutting it downward.
FIG. 3 shows a process of forming the cut groove 25, and in each process diagram shown in (a) to (h), the upper stage is a plan view and the lower stage is a front view.
4 and 5 show the process of expanding the cut groove 25, respectively. In each of the process diagrams shown in (a) to (d), the left side is a front view and the right side is a side view.

In the formation process of the cut groove 25 shown in FIG. 3, after the cutting device 10 is arranged on the front side of the working position, the feed mechanism 14 in the cutting machine 11 is operated to set the blade 12 to the uppermost position. The entire cutting machine 11 is arranged at the left end portion of the horizontal beam 17, and the blade 12 is arranged at a position facing the left side surface of the column 1 as shown in FIG.
From this state, the entire cutting machine 11 is guided by the feed rail 20 and moved to the right in the figure, so that the surface layer of the pillar 1 is cut from the left side by the blade 12 as shown in FIG. Cut portions 26 (shown with broken lines) are formed.
When the shaft portion of the blade 12 interferes with the column surface and further feeding becomes difficult, the blade 12 is temporarily stopped, and the crescent-shaped cut portion 26 is broken by a tool such as a bar as shown in FIG. I will take it.
As a result, the blade 12 can be fed again, so that the cutting by the blade 12 is resumed. After the crescent-shaped cutting portion 26 is formed as shown in (d), the cutting portion 26 as shown in (e) is formed. I'll break it up.
Thereafter, as shown in (f) to (g), the process of cutting in a crescent shape and repeating it is repeated step by step until the right side of the pillar 1 is reached. As shown, a cut groove 25 having a width corresponding to the diameter of the blade 21 is formed.

Next, the entire surface layer portion of the column is cut out by cutting and expanding the cut groove 25 downward in the cutting and expanding process shown in FIGS.
That is, by moving the blade 12 downward by the feed mechanism 14 of the cutting machine 11 from the state at the end of the formation of the cut groove 25 shown in FIG. 4A, the bottom surface of the cut groove 25 is lowered as shown in FIG. After cutting downward, the blade 12 is moved to the left as shown in (c) to form a strip-like cut portion 27 (shown with a broken line) at the lower portion of the cut groove 25 ( As shown in d), the entire cut-out portion 27 is collectively divided by a tool such as a bar.
As a result, the first-stage cutting and expanding process is completed, and thereafter, the cutting and expanding process is repeated to cut and expand the cut groove 25 to the entire surface layer portion. That is, from the state of FIG. 5A in which the first-stage cutting and expanding process has been completed, the bottom of the cut groove 25 is further cut downward as shown in FIGS. Then, a further cut portion 27 is formed, and as shown in (d), it is cut and a second-stage widening process is performed, and thereafter, the processes of FIGS. 4 to 5 are sequentially repeated.

  In addition, when repeatedly performing the cutting and expanding process shown in FIGS. 4 to 5, the blades 12 may be sequentially moved downward within the operating range of the feed mechanism 14 of the cutting machine 11. When the limit is reached, the connection position of the horizontal beam 17 with respect to the column 16 is changed to a lower position step by step, and the entire position of the cutting machine 11 may be changed downward. When the horizontal beam 17 reaches the lower limit position of the support column 16, the support column 16 (that is, the entire cutting device 10) may be replaced with the lower floor.

According to the cutting method of the present embodiment, the cutting machine 11 supported by the support frame 15 is moved vertically and horizontally, and the cutting portions 26 and 27 are formed by the blade 12 while the cutting portions 26 and 27 are cut. It is possible to cut off the surface layer of the chassis efficiently only by going, and the work efficiency can be greatly improved compared to the case of using conventional electric hammers and chippers to beat the chassis, and there is a lot of noise and vibration. Therefore, a large amount of dust is not generated, and therefore high-precision construction is possible without requiring complicated and troublesome construction management.
Further, in the present invention, a general-purpose wall saw can be used as it is, although it is necessary to use a blade whose flange does not protrude on the back side, and a special cutter as shown in Patent Document 1 is used. It is not necessary to use, and since it is not necessary to open a hole for inserting a special cutter in advance, it is not only superior in versatility compared to the turning method shown in Patent Document 1, but also more efficient. Work is possible.

  Although one embodiment of the present invention has been described above, the above embodiment is merely a preferred example, and the present invention is not limited to the above embodiment, and may be within the scope of the present invention. For example, the changes and applications listed below can be considered.

In the above embodiment, the excision device 10 is arranged to be supported by the beam 2, and for that purpose, the support column 16 is installed so as to stretch between the upper and lower beams 2, but this is not possible. In this case, an appropriate mount for arranging the resecting device 10 may be prepared and the resecting device 10 may be installed thereon.
Further, when performing this type of work, a work scaffold 30 (in the illustrated example, a normal frame scaffold) as shown by the chain line in FIG. 2C is usually provided. As shown, the excision device 10 may be installed on the working scaffold 30 (in FIG. 6, the cutting machine 11 is not shown, and only the movement trajectory of the support frame 15 and the blade 12 is shown).

In the above embodiment, the notch groove 25 is formed in advance in the upper part of the column surface and is cut and expanded downward, but conversely, the notch groove 25 is formed in advance in the lower part of the column surface and is formed upward. The same can be said by cutting and expanding toward.
In addition, the cutting machine 11 is not limited to reciprocating as in the above-described embodiment, and may of course be always moved in one direction.

  The above embodiment is an application example in the case of cutting the surface layer portion of the column surface, but the present invention is not limited to the column surface, and the surface layer portion of various concrete structures including simple wall surfaces and the surfaces of various concrete structures. As a matter of course, it can be widely applied to ablation. And it is needless to say that the detailed configuration of the cutting machine 11 and the support frame 15 and the specific work process and the like may be optimally designed in consideration of the form of the target work object, the work range, and other conditions. Yes.

FIG. 3 is a diagram illustrating an embodiment of the present invention and showing a pillar that is a body to be excised. It is a figure which shows an example (example of installation to a housing) of an installation state of the excision apparatus. It is a figure which shows a cutting process (formation process of a notch groove) similarly. It is a figure which shows an excision process (cutting-in process of a notch groove) similarly. It is a figure which shows the excision process (same as above). It is a figure which shows the other example (installation example to a scaffold) of the installation condition of the excision apparatus similarly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pillar 2 Beam 10 Cutting device 11 Cutting machine 12 Blade 13 Drive mechanism 14 Feed mechanism 15 Support frame 16 Support column 17 Horizontal beam 18, 19 Bracket 20 Feed rail 25 Cut groove 26 Cut part (Crescent shape)
27 Cut section (band plate shape)
30 Working scaffold

Claims (1)

A method for cutting out a surface layer of a concrete frame such as a wall or a pillar of a building,
A cutting machine equipped with a circular plate-like blade capable of cutting concrete is arranged so as to be movable in the vertical and horizontal directions along the surface on the front side of the work target body. By repeating the operation of cutting the surface layer portion of the housing from one side portion toward the other side portion and forming a crescent-shaped cut portion, the blade is formed on the housing surface layer portion. After forming a cut groove having a width dimension corresponding to the diameter dimension and a depth dimension corresponding to the thickness dimension of the surface layer portion to be cut, the entire surface layer portion to be cut is cut by widening the cut groove. And
When cutting and expanding the cut groove, the bottom of the cut groove is cut and expanded in the width direction to form a strip-shaped cut portion, and then the cut portion is collectively cut. How to remove the surface layer.

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