JP4217181B2 - Hanging method and hanging device - Google Patents

Description

  The present invention relates to a suspending method and a suspending device for removing a surface finishing material of a concrete skeleton such as mortar and tile, or surface concrete of the concrete skeleton itself.

  In seismic reinforcement work, there are the most commonly used methods of reinforcing concrete structures, adding existing columns and walls, and installing concrete walls in the column beam frame. In carrying out these methods, it is easy to remove the surface finishing material such as mortar and tiles, and in the case of concrete laying, the concrete surface of the concrete frame itself, so that the existing concrete structure frame can be integrated with the concrete in the new section. There is a need to.

  In the seismic reinforcement work, etc., the most commonly used methods for reinforcing concrete structures include a method of adding existing columns and walls, and a method of newly installing a concrete wall in a column beam frame. In implementing these methods,

  As a method for suspending the surface of a concrete frame, a method using a hand breaker or the like is common. Moreover, the apparatus which inserts rotating a disk-shaped concrete cutter between concrete frames and finishing mortar, and peels off finishing mortar is also used (for example, refer patent document 1).

In addition, a suspension device for hanging concrete with a water jet is also used (see, for example, Patent Document 2).
Japanese Patent No. 3406252 JP 2003-166212 A

  However, when using a hand breaker, it was necessary to pay close attention not to damage the concrete frame. Further, vibration, noise, dust and the like are generated, which is not preferable for workers and residents. In addition, the cutting depth varies, the cutting trace is not uniform, and it is difficult to measure integration with post-cast concrete.

  With the method of inserting a disk-shaped concrete cutter while rotating between the concrete frame and the finishing mortar, the work had to start from the end of the concrete and could not be done from any place . Further, when the thickness of the finished mortar was unknown, the finished mortar could not be reliably peeled off and the concrete frame surface could not be completely exposed.

  Depending on the water jet, there is an advantage that the method of hanging does not damage the reinforcing bars or the sound concrete part, and does not generate vibration or dust. However, since all of the concrete to be removed must be cut with a water jet, a large amount of cutting water is required and the working time is prolonged. In addition, the cutting depth may vary due to the influence of the aggregate of the concrete frame, and the cutting trace may not be uniform.

  The object of the present invention is to start the work from an arbitrary position to completely expose the concrete body surface, obtain a uniform cutting trace of a predetermined depth, and suppress the generation of vibration, noise and dust, It is to provide a suspension method and a suspension device that can save water used.

In order to solve the above problems, as shown in FIGS. 2 to 7, the first invention is a suspension method for removing the surface material of the concrete body, and the surface of the concrete body is rotated by rotating the annular cutting blade 21. The core boring machine 20 that cuts the core is advanced perpendicularly to the surface of the concrete frame to cut to a predetermined depth, the core boring machine 20 is moved backward, and then the core boring machine 20 is moved in parallel with the surface of the concrete body. It is characterized by repeating.

  Here, the surface material is a surface finishing material of a concrete frame such as mortar or tile, or surface concrete to be removed from the concrete frame itself.

According to 1st invention, since the core boring machine 20 which rotates the cyclic | annular cutting blade 21 and cuts the surface of a concrete frame is used, generation | occurrence | production of a vibration, noise, and dust can be suppressed. Further, the core boring machine 20 is advanced perpendicularly to the surface of the concrete frame to cut to a predetermined depth, the core boring machine 20 is moved backward, and then the core boring machine 20 is moved parallel to the surface of the concrete frame. By repeating, the surface of the concrete frame can be cut uniformly without being affected by the aggregate of the concrete frame.

The second invention is a suspension device 10 used in the suspension method of the first invention , and as shown in FIGS. 1 to 7, a core boring machine for cutting the surface of a concrete frame by rotating an annular cutting blade 21 20 and a moving device 11 for moving the core boring machine 20 in the x-axis direction perpendicular to the surface of the concrete frame and in the three-axis directions parallel to the surface of the concrete frame and in the y-axis direction or the z-axis direction. It is characterized by becoming.

  Here, the x axis, the y axis, and the z axis can be arbitrarily set in accordance with the shape of the concrete frame. For example, when the surface of the concrete frame is a vertical wall surface, the x-axis can be set as an axis perpendicular to the wall surface, the y-axis can be set as a vertical and horizontal axis to the x-axis, and the z-axis can be set as a vertical axis. Alternatively, when the surface of the concrete frame is a horizontal floor surface, the x-axis can be set as a vertical axis, and the y-axis and z-axis can be set as the front-rear axis and the left-right axis. The same applies when the surface of the concrete frame is inclined.

According to the second invention, the core boring machine 20 is moved in the x-axis direction perpendicular to the surface of the concrete body to cut the surface of the concrete body, and the core boring machine 20 is parallel to the surface of the concrete body and perpendicular to each other. By moving in the y-axis direction or the z-axis direction, an arbitrary position on the surface of the concrete frame can be cut.

3rd invention is the suspension apparatus 10 of 2nd invention, Comprising: As shown, for example in FIGS. 2-4, the said moving apparatus 11 makes the said core boring machine 20 into a concrete frame along the said x-axis direction. together toward it is advanced to cut the surface of the concrete framework to a predetermined depth x ₁ in, the core first and operations retracting the boring machine 20, the core boring machine 20 to the y-axis direction at a predetermined distance y The second operation of moving by ₁ is alternately repeated.

According to the third invention, the core boring machine 20 is advanced toward the concrete body along the x-axis direction to cut the surface of the concrete body to the predetermined depth x ₁ and the core boring machine 20 is moved backward. By alternately repeating the first operation and the second operation of moving the core boring machine 20 in the y-axis direction by a predetermined distance y ₁ , the surface of the concrete body has a width substantially equal to the diameter of the cutting blade 21. The cutting groove 3 can be cut.

4th invention is the suspension apparatus 10 of 3rd invention, Comprising: For example, as shown to FIGS. 5-7, the said moving apparatus 11 carries out predetermined | prescribed alternately the said 1st operation | movement and the said 2nd operation | movement. Each time it is repeated, the third operation of moving the core boring machine 20 in the z-axis direction by a distance z ₁ less than the diameter of the cutting blade 21 is repeated.

According to the fourth invention, every time the first operation and the second operation are alternately repeated a predetermined number of times, the core boring machine 20 is moved in the z-axis direction by a distance z ₁ equal to or less than the diameter of the cutting blade 21. By repeating the third operation, the cutting groove 3 cut on the concrete surface can be widened in the z-axis direction by the movement distance z ₁ .

The fifth invention is the suspension device 10 according to any one of the second invention, the third invention, and the fourth invention, and is released around the cutting blade 21, for example, as shown in FIG. A recovery device (scattering prevention cover 12, waste liquid pipe 13 and vacuum device 14) for recovering a waste liquid comprising a coolant for cooling the cutting blade 21 and / or a dust prevention agent for preventing the generation of dust and the cut surface material; , A separation device (precipitation tank 15) for separating the coolant and / or dust prevention agent from the collected waste liquid, and a supply device (pump 16) for supplying the separated coolant and / or dust prevention agent around the cutting blade And a water supply pipe 17).

  Here, as a coolant, water etc. can be used, for example. In addition, as the dust preventing agent, for example, mist-like water or foamy water containing a surfactant can be used.

According to the fifth invention, the recovery device (scattering prevention cover 12, waste liquid pipe 13 and vacuum device 14) generates coolant and / or dust that is discharged around the cutting blade 21 and cools the cutting blade 21. The waste liquid composed of the dust prevention agent to be prevented and the cut concrete is recovered, and the coolant and / or the dust prevention agent is separated from the recovered waste liquid by the separation device (precipitation tank 15), and the separated coolant and By supplying the dust prevention agent around the cutting blade 21 with the supply device (pump 16 and water supply pipe 17), the waste liquid is reused as the coolant and / or dust prevention agent, and the coolant and / or dust prevention The consumption of the agent can be suppressed.

  According to the present invention, it is possible to suppress generation of vibration, noise, and dust by cutting the concrete surface using a core boring machine. In addition, the suspension work can be started from an arbitrary position on the concrete surface.

  In addition, the core boring machine is moved vertically to the surface of the concrete frame to cut to a predetermined depth, the core boring machine is moved backward, and then the core boring machine is moved in parallel with the surface of the concrete frame. The surface of the concrete frame can be cut uniformly without being affected by the aggregate of the concrete frame, and the surface material can be reliably removed by setting an appropriate depth. Further, by reusing the waste liquid as a coolant and / or dust prevention agent, it is possible to save the coolant and / or dust prevention agent to be used.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram showing an embodiment of a lifting device 10 according to the present invention. In FIG. 1, a suspension device 10 is installed facing the side surface of a concrete column 1.

  The suspension device 10 is generally composed of a core boring machine 20, a moving device 11, a scattering prevention cover 12, a waste liquid pipe 13, a vacuum device 14, a sedimentation tank 15, a pump 16, and a water supply pipe 17. .

The core boring machine 20 is used for drilling a concrete structure, collecting a core specimen, and the like, and includes a front cutting blade 21 (bit) and a rear main body portion 22. The cutting blade 21 has an annular shape and rotates in the radial direction. The cutting blade 21 can use a thing with a diameter of about 50-300 mm properly according to the site | part of a concrete structure to cut, member shape, etc., for example.
A motor for driving the cutting blade 21, a water supply pipe for supplying cooling water to the cutting blade 21, and the like are built in the main body 22.

  The moving device 11 holds the core boring machine 20 and moves the core boring machine 20 in the three axial directions of the front-rear direction, the left-right direction, and the up-down direction. The operation of the moving device 11 is automatically controlled, and the core boring machine 20 can be moved in any direction at any speed.

  The scattering prevention cover 12 surrounds the cutting blade 21 of the core boring machine 20 and the portion of the concrete to be cut, and prevents the scattering of coolant from the cut concrete (noro) and the cutting blade 21. The cooling water also has a role of preventing scattering of the cut concrete.

  A mixture of waste water and cooling water (waste liquid) is sucked into the vacuum device 14 through the waste liquid pipe 13. The waste liquid sucked into the vacuum device is stored in the sedimentation tank 15 and separated. The supernatant is pumped up by the pump 16, supplied to the core boring machine 20, the sprayer or the foam injector through the water supply pipe 17 and reused as cooling water for the cutting blade 21. Dispose of the precipitate appropriately as waste.

  In addition, it may replace with cooling water or you may spray the dust prevention agent which prevents scattering of the cut concrete on the cutting surface of concrete with cooling water. As the dust preventing agent, water in the form of mist or foamed water containing a surfactant can be used. In order to inject the dust prevention agent onto the concrete cut surface, a sprayer or a foam sprayer is attached to the anti-scattering cover 12, and a water supply pipe 17 is connected to the sprayer or the foam sprayer.

  Moreover, when it is not preferable to use cooling water or a dust prevention agent, cutting may be performed without using cooling water or a dust prevention agent. In this case, the waste liquid pipe 13 is changed to a dust collection pipe, and the vacuum device 14 is changed to a dust collector.

  Next, a description will be given of a hanging operation for hanging the side surface of the concrete column 1 using the hanging device 10 of the present invention. First, as shown in FIG. 2, the core boring machine 20 and the moving device 11 are installed with the side surface of the concrete column 1 facing the cutting blade 21. At this time, the core boring machine 20 is installed so that the longitudinal axis is perpendicular to the side surface of the concrete pillar 1.

  When the core boring machine 20 and the moving device 11 are installed, the anti-scattering cover 12 is installed so as to surround the cutting blade 21 of the core boring machine 20 and the portion of the concrete to be cut. Further, the water supply pipe 17 and the waste liquid pipe 13 are attached, and the vacuum device 14, the sedimentation tank 15, the pump 16 and the like are attached, and the installation of the suspension device 10 is completed.

Next, the following first operation and second operation are repeated.
<First operation>
As shown in FIG. 3, the core boring machine 20 is advanced by the moving device 11 while rotating the cutting blade 21. When the cutting blade 21 is in contact with the side surface of the pillar 1 of a concrete, further with a cutting edge 21 is rotated, the core boring machine 20 is advanced a predetermined depth x ₁ (e.g., 5 to 30 mm) cut away. Here, x ₁ is the thickness of the concrete that will take chipping, or finishing material. Next, the core boring machine 20 is retracted. At this time, an arc-shaped groove 2 having a depth of x ₁ and the same shape as the cutting blade 21 is formed on the side surface of the concrete column 1. The width of the groove 2 is determined by the thickness of the cutting blade 21 (for example, about 4 to 10 mm).

<Second operation>
The core boring device is moved by a predetermined distance y ₁ (for example, 4 to 20 mm) in one of the upper, lower, left, and right directions (for example, the right direction). Here, y ₁ is about 1-4 times the width of the groove 2, too and the working time becomes longer small, too large finished surface becomes rough.

By repeating the first operation and the second operation described above, the arc-shaped groove 2 is continuously formed at a predetermined distance y ₁ in one of the upper, lower, left and right directions, as shown in FIG. In addition, a rectangular cutting groove 3 can be formed. Here, in the second operation, when the core boring device is moved in either the left or right direction, the cutting groove 3 is formed in the left or right direction, and when moved in either the up or down direction, the cutting is performed. The groove 3 is formed in the vertical direction. The width of the cutting groove 3 is determined by the diameter of the cutting blade 21 to be used. The number of repetitions of the first operation and the second operation is a quotient obtained by dividing the length of the formed cutting groove 3 (for example, the width d of the column 1) by the predetermined movement distance y ₁ in the second operation. It is.

Further, the following third operation is performed every time the first operation and the second operation are repeated a predetermined number of times.
<Third operation>
As shown in FIG. 5, the core boring device is moved to one of the upper, lower, left, and right directions perpendicular to the moving direction in the first operation (for example, downward when moving to the right in the second operation). It is moved by a distance z ₁ less than the diameter of the cutting blade 21 to be used.

Each time the first operation and the second operation are repeated a predetermined number of times, the third operation is performed, and the first operation and the second operation are repeated a predetermined number of times to form the groove 2 as shown in FIG. Further, the groove 2 can be continuously formed at a predetermined distance y ₁ in any one of the upper, lower, left and right directions, and the rectangular cutting groove 3 can be widened by z ₁ as shown in FIG. it can. When the above operation is repeated and the suspension work on one side of the concrete pillar 1 is completed, the other work is similarly performed on the other side. With the above operation, the concrete column 1 is completed. In addition, a series of operation | movement can be started from the arbitrary positions on the surface of the pillar 1 made from concrete, and can be complete | finished in arbitrary positions.

  According to the above suspension method, since the concrete surface is cut using the core boring machine 20, the generation of vibration, noise, and dust can be suppressed. Further, the necessary lifting depth can be ensured without being affected by the aggregate of the concrete frame. Moreover, since the waste liquid is reused as cutting water, water consumption can be suppressed.

  Furthermore, by setting the first to third operations in advance and automating the fishing work, not only can labor costs be saved, but also a uniform finish can be achieved.

  In addition, in the above embodiment, although the surface of the prismatic column was cut, this invention is not limited to this, You may cut the surface of a columnar column. Moreover, you may cut a wall surface, a floor surface, a ceiling surface, etc. besides a concrete pillar.

  In addition, the shape of the anti-scattering cover and the like can be arbitrarily changed accordingly, and other specific details such as the detailed structure can be changed as appropriate.

The present invention is an elevational view showing the structure of a fishing device. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the fishing method using the fishing device of this invention, (a) is a front view, (b) is a side view. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the fishing method using the fishing device of this invention, (a) is a front view, (b) is a side view. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the fishing method using the fishing device of this invention, (a) is a front view, (b) is a side view. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the fishing method using the fishing device of this invention, (a) is a front view, (b) is a side view. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the fishing method using the fishing device of this invention, (a) is a front view, (b) is a side view. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the fishing method using the fishing device of this invention, (a) is a front view, (b) is a side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 apparatus 11 moving apparatus 12 scattering prevention cover 13 waste liquid pipe 14 vacuum apparatus 15 sedimentation tank 16 pump 17 water supply pipe 20 core boring machine 21 cutting blade

Claims (3)

A core boring machine that rotates an annular cutting blade to cut the surface of a concrete body, and an x-axis direction perpendicular to the surface of the concrete body and a y-axis direction that is parallel to and perpendicular to the surface of the concrete body Or a hanger method using a hanger provided with a moving device that moves in the three axial directions of the z-axis direction,
A first operation of advancing the core boring machine in the x-axis direction perpendicular to the surface of the concrete frame to cut to a predetermined depth, and retracting the core boring machine;
A suspension method characterized by alternately repeating the second operation of moving the core boring machine in the y-axis direction by a distance equal to or less than the diameter of the cutting blade . The moving device moves the core boring machine in the z-axis direction by a distance equal to or smaller than the diameter of the cutting blade every time the first operation and the second operation are alternately repeated a predetermined number of times. 2. The suspension method according to claim 1 , wherein the operation is repeated. A core boring machine that rotates an annular cutting blade to cut the surface of a concrete frame;
A moving device for moving the core boring machine in the x-axis direction perpendicular to the surface of the concrete frame, and in the three axis directions parallel to the surface of the concrete frame and in the y-axis direction or the z-axis direction;
A coolant that is released around the cutting blade to cool the cutting blade and / or a dust prevention agent that prevents the generation of dust,
A recovery device for recovering waste liquid consisting of the cut surface material, and a separation device for separating the coolant and / or dust prevention agent from the recovered waste liquid;
The fishing device, comprising a supply unit for supplying around the separated coolant and / or dedusting agents cutting edge.

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