JPS62297099A - Cutter for concrete structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention] (Technical Field) The present invention relates to an apparatus for cutting concrete structures using water.

(Prior Art) As one of the devices for cutting concrete structures, there is a device that mechanically cuts the concrete structures, such as an electric cutter. However, such devices generate noise, vibration, and dust during cutting, and are therefore limited in the locations where they can be used.

As one of the other equipment for cutting concrete structures,
There is a device that uses an ultra-high pressure water jet. However, in this device, when the discharge velocity of the water jet is, for example, 2500 K g f / cm 2, the discharge speed is about 470 K g f / cm 2. Due to the high speed of m/sec, a loud sound is generated when the water jet impinges on the concrete structure and when it passes through the cut slit. In addition, the water used for cutting, that is, the cutting water, is scattered around together with the cut concrete dust, which is troublesome to dispose of.

(Object of the invention) The present invention does not generate vibration or dust, has low noise,
It is an object of the present invention to provide a cutting device for a concrete structure, which prevents cutting water and cut concrete dust from scattering around.

(Structure of the Invention) The cutting device of the present invention includes a water jetting means having a nozzle that jets water toward a concrete structure to be cut, and a water jetting means disposed on one surface of the concrete structure. a recess extending in the direction of the cutting line and an opening communicating with the recess and extending along the recess; is aligned with the cutting line and is liquid-tightly disposed on the side of the moving means of the concrete structure.
a casing, and a recess extending along the cut line, the recess being aligned with the recess of the first casing to inject liquid onto the side of the concrete structure opposite the first casing. a second casing closely arranged; and an elastically deformable closing means disposed in the first casing and closing the opening so that at least the tip of the nozzle can be inserted into the recess through the opening. and a means for guiding the water in the recesses of the first and second casings to the outside of the recesses (Operation and Effect of the Invention) In the present invention, the concrete structure has a structure in which concrete is ejected from a nozzle. cut into shapes that are destroyed by water. Therefore, according to the cutting device of the present invention, vibration and dust are not generated during cutting.

Further, in the present invention, the first and second casings are arranged in a liquid-tight manner on the concrete structure to be cut, and the part of the concrete structure to be cut is liquid-tightly placed from the surrounding area by the first and second casings. will be closed. For this reason 1
According to the cutting device of the present invention, the noise generated by the cutting water is confined within the recess, so that less noise leaks out of the casing.

Furthermore, according to the invention, the cutting water is ejected into the recesses of the first and second casings and guided out of the recesses together with the cut concrete dust. Therefore, according to the cutting device of the present invention, the cutting water and the dust of the cut concrete are not scattered around and can be easily disposed of. explain.

The cutting device 10 shown in FIG.
used to cut the wall 18 between the upper and lower floor slabs 14,16. However, the present invention can also be applied to cutting devices for other concrete structures, such as floor slabs.

The cutting device 10 has first and second casings 20.degree. 22 arranged one above the other on the wall 18 to be cut.

As shown in FIGS. 2 to 5, each casing 20.22 has an elongated main body portion 20a defining a recess 24.26 having a U-shaped cross section.

22a, and a flange portion 20 extending outward from the main body portion.
b, 22b. Each flange portion 20b, 2
A sealing member 28, 30, which is elastically deformable like a rubber plate q, is fixed to the side of the wall 18 of 2b. Also, the second
Elastically deformable cushioning materials 32, such as rubber plates, are arranged at four locations 26 of the casing 22. Recess 24,2
The upper and lower ends of 6 are closed (not shown in Figure 1).

As shown in FIGS. 2 to 5, the bottom plate of the main body portion 20a of the first casing 20 is provided with an opening 34 that communicates the inside and outside of the casing 20, that is, the recess 24 and the outside of the casing 20. There is.

The opening 34 extends in the longitudinal direction of the casing 20 along the recess 24 and is closed by a pair of closures 36, 38 fixed to the outside of said base plate. The closing body 36 is
Regarding the opening 34, it extends from one side of the bottom plate to the center of the opening 34 in the width direction. In contrast, the closure 38 extends from the other side of the bottom plate with respect to the opening 34 through the opening 34 into the recess 24 and further to the other side of the bottom plate. Note that the cross-sectional shape of the recesses 20 and 22 may be semicircular, triangular, or the like.

On the side of the closure body 36, 38 of the bottom plate of the upper body part 20a,
A pair of spacers 42 and a pair of press plates 44 defining a groove 40 extending along the opening 34 are fixed on both sides of the opening 340.

The cutting device 10 also includes a jet 46 that sprays a water jet onto the wall 18, the jet 46 moving! j1
．． It includes a head 50 supported by a structure 48 and a nozzle 52 fixed to the head. The nozzle 52 passes through a plate-shaped guide 54 slidably received in the groove 40 of the first casing 20 and into the recess 24 of the casing 20 of '5S1.
extends to. Nozzle 52 is connected via head 50 and hose 56 to an ultra-high pressure water supply pump (not shown).

As shown in FIGS. 6 to 8, the moving mechanism 48 has two connecting pieces 5 that connect the moving mechanism 48 to the casing 20.
8, a long frame 60 fixed in parallel to the connecting piece 58, and supporting pieces 62 fixed to both ends of the frame.
A pair of rails 64 fixed parallel to the frame 60;
A screw cup 66 rotatably supported on a support piece 62 in seven rows with the rail, a rotation source 68 for rotating the threaded rod around its central axis, and a slider 70 screwed into the threaded rod 66. .

The slider 70 is supported by the rail 64 so as to be movable in the longitudinal direction of the rail, and is moved along the rail 64 when the screw cup 66 is rotated. squirt v148
As shown in FIGS. 2 to 5, the nozzle 52 is installed on the slider 70 so that the tip of the nozzle 52 reaches the recess 24 through the opening 34 of the casing 2o.

The cutting device 10 further includes a case where the casing 20° 22 is connected to the wall 1.
It has a pair of support mechanisms 72 and 74 for supporting the casing along 8. The support mechanism 72, 74 is a jack consisting of a cylinder and a piston rod. The support mechanism 72 supports the moving mechanism 48 and the casing 20 via a coupling jack 76, and the support mechanism 74 supports the casing 22 via a coupling jack 78. Each support mechanism 72.74 is connected to the upper and lower floor slabs 14.1 by placing them in a vertical position and in that state with the piston ronds protruding.
By pressing 6, the state shown in FIG. 1 is maintained.

Note that the cutting device 10 cuts the casings 20 and 22 into the wall 1.
8 may be fixed with bolts.

At one longitudinal end of the casing 20.22, a recess 2 is provided.
Connected in 4, 26 are hoses 80, 82 for guiding the water out of the recesses 24, 26. Hose 80.82
Drain pumps 84 and 86 are connected to the drain pumps.

When cutting the wall 18, the casing 20 is supported by the support mechanism 72 so that the hose 80 is on the lower side, the recess 24 is on the side of the machine 8, and the opening 34 is aligned with the cutting line, and the moving mechanism is supported by the jack 76. 48 and is pressed against the wall 18. In contrast, casing 22 is supported by support mechanism 74 and pressed against wall 18 by jacks 78 such that its recesses 26 are aligned with recesses 24 in casing 20. This allows the wall 18 and the casing 2
A liquid richness between 0 and 22 is maintained.

Next, the jet Pt46 is moved to the upper end by the moving mechanism 48. The jet 46 then directs the jet from the nozzle 52 to the wall 18.
It moves downward while spouting high-pressure water towards the target. The ejected water impinges on the wall 18 and rebounds from the wall into the recess 24, but because the opening 34 of the casing 20 is closed by the closure 36, 38, it does not flow out of the recess 24 through the opening 34. It is discharged together with the cut concrete dust through the hose 80 by the pump 84 without flowing out, and is not scattered around the cutting device 10.

When a hole was made in 918, water spouted out.

Not only does it bounce back to the side of the casing 20 through the hole,
The side of the casing 22 is reached. However, casing 22
The water that has reached the side is discharged by the pump 86 through the hose 82 together with the cut concrete dust, and is not scattered around the cutting device 10.

The main noises generated when FjJ is disconnected are the jetting sound when water jets out from the nozzle 52, the impact sound when the water collides with the wall 18, and the collision sound when the water collides with the casings 20 and 22. However, in the cutting device IO, the water collision location is closed by the casings 20, 22, and the structure is such that the water collides with the buffer material 32, so the noise is low.

[Brief explanation of the drawing]

FIG. 1 is a front view showing one embodiment of the cutting device of the present invention, FIG. 2 is a sectional view taken along line 2-2 in FIG. 1, and FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 1. 4 is a sectional view taken along line 4-4 in FIG. 3, FIG. 5 is a perspective view showing the arrangement of the casing, and FIG. 6 is a front view of the moving mechanism. , FIG. 7 is a sectional view taken along line 7--7 in FIG. 6, and FIG. 8 is an enlarged sectional view taken along line 8--8 in FIG. lO: Cutting device, 12: Concrete 1/Structure, 2
0, 22: Casing, 24, 26: Recess, 28
, 30: Seal member, 32: Cushioning material, 34: Opening,
36, 38: closure body, 40: groove,
46: Spout machine. 48: Moving mechanism, 52: Nozzle, 54 guide, 80, 82: Hose. 84.86: Drain pump. Agent Patent Attorney Nobuyuki Matsunaga Figure 1 Figure 2 Figure 3 Prisoner Figure 4 Figure 5 Figure 8

Claims (4)

[Claims] (1) A water jetting means having a nozzle that jets water toward the concrete structure to be cut, and the water jetting means being arranged on one side of the concrete structure and moving the water jetting means along the cutting line. a first casing having a recess extending in the direction of the cut line and an opening communicating with and extending along the cut line, the opening being aligned with the cut line; a first casing liquid-tightly disposed on the side of the means for moving an object;
a recess extending along the cutting line, the recess being aligned with the recess of the first casing and liquid-tightly disposed on the side of the concrete structure opposite the first casing; a second casing disposed in the first casing and closing the opening so that at least the tip of the nozzle can be inserted into the recess through the opening; means for guiding water in the recesses of the first and second casings out of the recesses. (2) The concrete structure cutting device according to claim 1, wherein the second casing includes an elastically deformable buffer member disposed in at least the recess. (3) the first casing has a groove extending along the opening; the water ejection means has a guide slidably received in the groove; and the nozzle extends through the guide. 1. A cutting device for concrete structures according to claim 1, which extends into said recess of one casing. (4) The cutting device for a concrete structure according to claim (1), wherein the first and second casings include a sealing member that contacts the concrete structure.