JP2017008708A - Cutting device for concrete wall surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an energy-conserving and highly workable cutting device for a concrete wall surface, the cutting device being of a simple configuration that is not massive, offering ease of transportation and handling, allowing a cutter body to be supported horizontally for certain, enabling cutting work to be completed in a short period of time by smoothly moving the cutter body by human power because a load on a rotary blade is small during cutting, capable of cutting an entire periphery at almost a uniform depth with only a small amount of corner portions that are left uncut, and facilitating removal of a concrete basin after cutting.SOLUTION: A cutting device for a concrete wall surface includes a frame part fixed on a periphery of an opening of a concrete basin, and a cutter moving mechanism disposed on the frame part for moving a cutter body along an inner wall of the concrete basin on a horizontal plane. The cutter moving mechanism includes a cutter holding part that holds a cutter body, a parallel slide holding part that holds the cutter holding part slidably in a direction parallel to a side of the concrete basin, and an orthogonal slide holding part that holds the parallel slide holding part slidably in a direction orthogonal to the sliding direction of the parallel slide holding part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a concrete wall surface cutting device for cutting an inner wall of a rectangular concrete fence installed on a pavement surface such as an expressway.

Concrete pavements such as water collecting puddles for collecting rainwater etc. are installed on the pavement surface of expressways, etc., and gratings (lids) made of steel, etc. formed in a lattice shape are covered in the openings. Has been.
This concrete dredging will deteriorate over time due to vehicle traffic, etc., but especially on expressways, etc., since snow melting agents such as calcium chloride are sprayed, the snow melting water containing the snow melting agent flows into the concrete dredging. Corrosion and deterioration of the grating are likely to occur.
Therefore, regular replacement is necessary, but conventionally, an operator cuts the inner wall of a concrete fence with a hand-held small cutting machine, etc., and manually uses a bar or a grinder (concrete breaker). During the work, the top of the concrete fence was beaten and removed.
However, in order to prevent the fragments of concrete from being scattered around, it was necessary to work around the periphery, and traffic regulation was also required, which was a large-scale work. In addition, it takes time to manually beat the concrete fence, which not only burdens the worker, but also increases the time for traffic regulation and hinders traffic.
In addition, the fracture surface of the concrete fence is likely to be uneven, and the workability when installing a new grating is also lacking.
In addition, debris must be collected after the work, but if cleaning is insufficient and debris remains on the road surface, it may lead to traffic obstruction or accidents, so it takes time to clean up. There was a problem of lack of labor saving.
On the other hand, an underground structure cutting apparatus has been proposed for cutting an underground structure having a square (枡 -shaped) cross section from the inside.
(Patent Document 1) includes a rail that extends in the longitudinal direction of a saddle-shaped underground structure, an apparatus main body that horizontally moves on the rail, and a rotary blade that extends from the apparatus main body. An underground structure cutting device that can move freely around a rocking surface and expands and contracts on the rocking surface, and a rotary blade cuts a portion of a predetermined depth from the upper surface of the underground structure from the inner surface. It is disclosed.

JP2013-167053A

However, the above conventional technique has the following problems.
(1) (Patent Document 1) attempts to cut four sides of a structure by moving the apparatus body horizontally on the rail and swinging the rotary blade around the apparatus body. The range that can be cut by the swing of the blade is limited, and not only a large uncut portion is left in the corner, but also the cutting depth varies depending on the location and the cutting surface becomes non-uniform. It is necessary and has the problem of lack of workability and labor saving.
In addition, the rotation axis of the blade and the output shaft of the hydraulic motor do not match and the blade is supported in a cantilevered manner. There is a problem of lack of efficiency.
In addition, since the hydraulic motor is installed below the blade, the hose that connects the hydraulic motor and the hydraulic pump must be arranged so that it does not touch the blade, resulting in a lack of design flexibility and handling. doing.

  The present invention solves the above-mentioned problems, is simple and is not bulky, has excellent transportability and handleability, can reliably support the cutter body horizontally, and has less load on the rotary blade during cutting. It is possible to move the cutter body smoothly by human power and perform the cutting work in a short time, there is little uncut corner, and the entire circumference can be cut at a substantially uniform depth to obtain a clean cut surface An object of the present invention is to provide a concrete wall surface cutting device that can easily remove the cut concrete fence and is excellent in labor saving and workability.

Means for solving the problems, and actions and effects obtained thereby

In order to solve the above problems, a concrete wall cutting apparatus of the present invention has the following configuration.
A concrete wall surface cutting device according to claim 1 of the present invention is a concrete wall surface cutting device for cutting an inner wall of a square concrete wall installed on a pavement surface, and is a frame fixed to the periphery of the opening of the concrete wall. A cutter moving mechanism that is disposed on the frame portion and moves the cutter main body along the inner wall of the concrete wall in a horizontal plane, the cutter moving mechanism holding the cutter main body, A parallel sliding holding unit that slidably holds the cutter holding unit in a direction parallel to one side of the concrete fence, and a parallel sliding holding unit orthogonal to the sliding direction of the parallel sliding holding unit. And an orthogonal sliding holding portion that is slidably held.
This configuration has the following operations and effects.
(1) Since the frame part is fixed to the periphery of the opening of the concrete fence, the frame part does not move back and forth and right and left, and can be prevented from lifting. When cutting the concrete wall surface by moving the wall along the inner wall of the concrete fence, there will be no misalignment or tilting of the cutter body, and no excessive load will be applied to the cutter body. The main body can be moved to reliably perform cutting work, and it is excellent in workability, labor saving, and work efficiency.
(2) The cutter moving mechanism includes a cutter holding part that holds the cutter body, a parallel sliding holding part that holds the cutter holding part slidably in a direction parallel to one side of the concrete fence, and a parallel sliding holding part. By having an orthogonal sliding holding part that is slidably held in a direction orthogonal to the sliding direction of the parallel sliding holding part, the cutter body is moved back and forth in a horizontal plane by the parallel sliding holding part and the orthogonal sliding holding part. Since it can be moved to the left and right, the cutting depth (cutting depth) can be adjusted freely, and with the rotary blade of the cutter body cut into the concrete wall at a predetermined depth, the parallel sliding holder or orthogonal By sliding the cutter body along the sliding direction of the sliding holder, each side of the concrete fence can be reliably cut at a certain cutting depth to obtain a clean cut surface. For stability and stability It is.

Here, metals such as stainless steel, aluminum, and iron are preferably used as the material of the frame portion. Moreover, it is preferable that the shape of a frame part is formed in the shape of a square frame according to the shape of a concrete cage.
The frame part may be fixed to the periphery of the opening of the concrete fence and can be prevented from moving back and forth, left and right, and may be fixed to a concrete fence receiving frame or the like, and the pavement in which the concrete fence is installed It may be fixed to a surface or the like. The fixing device can be selected as appropriate, for example, an L-shaped hook or the like that engages with the periphery of the opening of the concrete cage is disposed so as to be able to advance and retreat with respect to the frame portion. The abutting portion of the fixing tool can be reliably abutted against the inner wall surface of the concrete cage, and the fixing stability and reliability are excellent. In addition, it is possible to use what is fixed to the inner side surface of the receiving frame or the like by screwing or the like, or what is fixed to the pavement surface around the periphery of the opening of the concrete fence using a pile or anchor. The fixture may be provided on the frame portion so that it can be handled integrally, or it may be prepared separately from the frame portion and attached only during work.

The cutter body only needs to have a rotary blade capable of cutting concrete, and a hydraulic type, an electric type, a compressed air drive type, a high pressure water drive type, an engine drive type, or the like can be used. Note that the hydraulic power unit, power supply, compressor, pressurized water supply unit, engine, etc. for driving the cutter body do not need to be mounted on the concrete wall cutting device. Can be reduced in size and weight, and has excellent transportability. Further, it is possible to supply hydraulic pressure and electric power to the cutter body by using a heavy machine or an electric vehicle that can take out hydraulic pressure to the outside.
The parallel sliding holding part and the orthogonal sliding holding part are only required to be able to slide the cutter holding part and the parallel sliding holding part in the respective sliding directions, and the structure can be appropriately selected. A cylindrical guide shaft is preferably used by extrapolating a cylindrical sliding portion and sliding the sliding portion along the guide shaft. Moreover, you may use what guides and moves a wheel, a roller, etc. along a rail, a groove | channel, etc.
The cutter moving mechanism preferably has an operation handle for moving the cutter holding part back and forth and right and left manually. In particular, the direction of the operation handle can be changed according to the moving direction of the cutter holding part. Is easy to handle. In this case, only the operation handle may be rotated about the vertical axis, or the cutter main body may be rotated about the vertical axis together with the operation handle with respect to the cutter holding portion. Further, by making the operating handle detachable or foldable, it is excellent in compactness and transportability when stored or not in use.

The invention according to claim 2 is the concrete wall surface cutting apparatus according to claim 1, wherein the parallel sliding holding portions are arranged in parallel with both ends supported by the orthogonal sliding holding portions. A parallel sliding guide shaft, and a parallel sliding cylindrical portion disposed on the cutter holding portion and slidably fitted on the two parallel sliding guide shafts. ing.
With this configuration, the following actions and effects are provided in addition to the actions and effects of the first aspect.
(1) The parallel sliding holding part has two parallel sliding guide shafts arranged in parallel with both ends supported by the orthogonal sliding holding part and two parallel sliding parts arranged in the cutter holding part. By having a parallel sliding cylinder part slidably inserted on each guide shaft, the cutter holding part can be kept horizontal, and the cutter holding part does not skew when sliding, The concrete wall can be cut at a substantially constant depth, and the cutting reliability is excellent.
(2) The cutter holder can be smoothly moved manually along the parallel sliding guide shaft with a simple configuration in which the parallel sliding cylindrical portion is extrapolated to the parallel sliding guide shaft. Excellent mass productivity.

  Here, when the cutting is performed by moving the cutter holding portion along the parallel sliding guide shaft of the parallel sliding holding portion, the cutting depth can be appropriately adjusted manually. In addition, by providing an end stopper that abuts the end surface of the parallel sliding cylinder at the end of the parallel sliding guide shaft, the cutter holding portion does not move more than necessary, and the rotary blade is positioned on the outer periphery of the concrete cage. Intrusion to the soil can be prevented. Moreover, you may provide the stopper which fixes a parallel sliding cylinder part to the desired position of a parallel sliding guide shaft by screwing etc. as needed. For example, when cutting by sliding the parallel sliding holding part with the orthogonal sliding holding part, if the parallel sliding cylinder part is fixed to the parallel sliding guide shaft, the cutter holding part becomes the parallel sliding guide shaft. The cutting can be performed at a substantially constant depth without moving along. In addition, the cutter main body does not move during conveyance of the concrete wall surface cutting device, etc., so that the rotary blade can be prevented from being damaged, and the handleability is excellent.

Invention of Claim 3 is a concrete wall surface cutting device of Claim 2, Comprising: The said orthogonal slide holding | maintenance part is arrange | positioned at the both sides of the said frame part orthogonally to the said parallel sliding guide axis | shaft. The guides that support both ends of the parallel sliding guide shaft by the two orthogonal sliding guide shafts and the orthogonal sliding tube portions slidably inserted on the two orthogonal sliding guide shafts, respectively. And a shaft support portion.
With this configuration, in addition to the operation and effect of claim 2, the following operation and effect are provided.
(1) The orthogonal sliding holding portion slides on two orthogonal sliding guide shafts disposed on both sides of the frame portion perpendicular to the parallel sliding guide shaft and on the two orthogonal sliding guide shafts. And a guide shaft support portion that supports both ends of the parallel slide guide shaft by means of an orthogonal slide cylinder portion that is movably inserted. The sliding direction is orthogonal, the cutter holder can be moved back and forth and left and right along the inner wall surface of the concrete fence, and the cutter holder is not tilted or skewed. The entire circumference can be cut at a substantially constant depth, and the cutting reliability and workability are excellent.
(2) The parallel sliding holding part can be moved smoothly along the orthogonal sliding guide shaft manually with a simple configuration in which the orthogonal sliding cylindrical part is extrapolated to the orthogonal sliding guide shaft. Excellent in productivity and mass productivity.

  Here, when the incision is made by moving the parallel sliding holding portion along the orthogonal sliding guide shaft of the orthogonal sliding holding portion, the cutting depth can be appropriately adjusted manually. Similarly to the parallel sliding guide shaft, an end stopper that abuts the end surface of the orthogonal sliding cylindrical portion can be provided at the end of the orthogonal sliding guide shaft. Moreover, you may provide the stopper which fixes an orthogonal sliding cylinder part to the desired position of an orthogonal sliding guide shaft by screwing etc. as needed. For example, when cutting by sliding the cutter holder with the parallel sliding holder, if the orthogonal sliding cylinder is fixed to the orthogonal sliding guide shaft, the parallel sliding holder becomes the orthogonal sliding guide shaft. The cutting can be performed at a substantially constant depth without moving along. In addition, the parallel sliding holding part does not move even when the concrete wall surface cutting device is transported, so that the rotary blade can be prevented from being damaged, and the handling property is excellent.

A fourth aspect of the present invention is the concrete wall surface cutting apparatus according to the second aspect, wherein the orthogonal sliding holding portion is arranged on one side portion of the frame portion orthogonal to the parallel sliding guide shaft. One orthogonal sliding guide shaft provided, and an end support portion that supports one end side of the parallel sliding guide shaft by an orthogonal sliding cylinder portion slidably inserted on the orthogonal sliding guide shaft And a guide wheel disposed on the other end side of the parallel sliding guide shaft and grounded to the pavement surface.
With this configuration, in addition to the operation and effect of claim 2, the following operation and effect are provided.
(1) The orthogonal sliding holding portion is slidable on one orthogonal sliding guide shaft disposed on one side of the frame portion orthogonal to the parallel sliding guide shaft and the orthogonal sliding guide shaft An end support portion for supporting one end of the parallel sliding guide shaft by an extrapolated orthogonal sliding cylindrical portion; and a guide wheel disposed on the other end of the parallel sliding guide shaft and grounded to the pavement surface. By having it, both ends of the parallel sliding guide shaft can be supported by the end supporter and the guide wheel, so the horizontal holding of the cutter holding part held by the parallel sliding holding part is maintained. The part can be moved along the orthogonal sliding guide shaft, and is excellent in labor saving and workability.
(2) Since the orthogonal sliding holding portion has only one orthogonal sliding guide shaft, the structure of the orthogonal sliding holding portion can be simplified, and the entire apparatus can be reduced in size and weight. Excellent handling, transportability and mass productivity.

  Here, when the guide wheel contacts the pavement surface and rotates while supporting the other end of the parallel sliding guide shaft, the parallel sliding holding portion can be moved along the orthogonal sliding guide shaft. When the pavement surface has irregularities or the like, the parallel sliding holding portion can be smoothly guided by laying a flat guide plate or the like along the moving direction of the guide wheels.

Invention of Claim 5 is a concrete wall surface cutting device of any one of Claim 1 thru | or 4, Comprising: The said cutter moving mechanism makes an operation handle a vertical axis | shaft with respect to the said cutter holding part. It has the structure provided with the handle | steering-wheel rotation mechanism hold | maintained so that rotation is freely possible.
With this configuration, in addition to the operation and effect of claim 2, the following operation and effect are provided.
(1) Since the cutter moving mechanism is provided with a handle rotating mechanism that holds the operation handle so as to be rotatable about the vertical axis with respect to the cutter holding portion, the handle rotating mechanism according to the traveling direction of the cutter body. By rotating the operation handle with, and changing the direction, the cutter body along with the parallel sliding holding part or the orthogonal sliding holding part can be moved smoothly together with the cutter holding part, and the concrete fence cutting work can be performed. Excellent efficiency and labor saving.

  Here, the handle rotating mechanism may be any mechanism as long as it can hold the operation handle so as to be rotatable about the vertical axis with respect to the cutter holding portion, and its structure can be selected as appropriate. An outer peripheral portion of the connected ring-shaped support plate is sandwiched from above and below by a ring-shaped handle base and a base support, and an operation handle is attached to the handle base. Since the handle base and the base support are rotatably held with respect to the support plate connected to the cutter holding portion, the operation handle can be rotated about the vertical axis to perform the sliding operation of the cutter holding portion. it can.

(A) Schematic plan view of the concrete wall cutting device according to the first embodiment (b) A cross-sectional schematic side view of an essential part of the concrete wall cutting device according to the first embodiment (A) Schematic plan view of the concrete wall cutting device of the second embodiment (b) A cross-sectional schematic side view of an essential part of the concrete wall cutting device of the second embodiment Schematic plan view of the concrete wall cutting apparatus according to Embodiment 3 3 is a schematic cross-sectional view taken along line AA in FIG. BB schematic cross-sectional view of FIG. Main part schematic sectional drawing which shows the handle | steering-wheel rotation mechanism of the concrete wall surface cutting device of Embodiment 3.

(Embodiment 1)
A concrete wall surface cutting apparatus according to Embodiment 1 of the present invention will be described below with reference to the drawings.
FIG. 1A is a schematic plan view of the concrete wall surface cutting device according to the first embodiment, and FIG. 1B is a schematic cross-sectional side view of an essential part of the concrete wall surface cutting device according to the first embodiment.
In FIG. 1, 1 is a concrete wall cutting device of Embodiment 1 used for cutting an inner wall of a rectangular concrete fence 31 such as a water collecting tank installed on a pavement surface 30 such as an expressway, and 2 is stainless steel or the like. The frame portion 2a of the concrete wall cutting apparatus 1 placed on the periphery of the opening 31a of the concrete cage 31 with the metal of 2 is a frame portion 2 formed in a rectangular frame shape in accordance with the shape of the opening 31a of the concrete cage 31 The base plate portion 2b is a peripheral wall portion of the frame portion 2 surrounding the outer periphery of the base plate portion 2a, and 3 is provided on each side of the base plate portion 2a of the frame portion 2 so as to be able to move forward and backward. Fixing tool 3 for fixing the frame 2 to the periphery, 3a is formed in an L-shaped hook shape and engages with the periphery of the opening 31a of the concrete cage 31. 3b is the contact part 3a by rotation. The The operation part 4 of the fixture 3 which moves back and forth in the horizontal direction to bring the contact part 3a into contact with the inner wall surface of the concrete basin 31 is provided with a hydraulic cutter body 20 having a rotary blade 21 disposed on the frame part 2. The cutter moving mechanism of the concrete wall cutting apparatus 1 that moves along the inner wall of the concrete fence 31 in the horizontal plane, 5 is a cutter holding part of the cutter moving mechanism 4 that holds the cutter body 20, and 6 is the cutter holding part 5 of the concrete fence 31. The parallel sliding holding part 7 of the cutter moving mechanism 4 slidably held in a direction parallel to one side of the cutter 7 is slidable in the direction perpendicular to the sliding direction of the parallel sliding holding part 6. It is the orthogonal sliding holding part of the cutter moving mechanism 4 hold | maintained to.

Next, details of the cutter moving mechanism will be described.
In FIG. 1, reference numeral 8 denotes two parallel sliding guide shafts of the parallel sliding holding part 6 supported at the both ends by the orthogonal sliding holding part 7, and 9 denotes the base 5 a of the cutter holding part 5. 4 parallel sliding cylinders, 9a each including two parallel sliding holding parts 6 arranged on the two parallel sliding guide shafts 8 and slidably inserted on the two parallel sliding guide shafts 8 respectively, and at least one parallel sliding cylindrical part 9a. A stopper for the parallel sliding holding portion 6 which is disposed on the sliding cylindrical portion 9 and fixes the parallel sliding cylindrical portion 9 to a desired position of the parallel sliding guide shaft 8 by screwing or the like, and 10 is a parallel sliding guide shaft 8. The two orthogonal sliding guide shafts 11 of the orthogonal sliding holding portion 7 disposed orthogonally to the both sides of the concrete rod 31 are slidably extrapolated to the two orthogonal sliding guide shafts 10 respectively. Orthogonal sliding holding that supports both ends of the two parallel sliding guide shafts 8 by a total of four orthogonal sliding cylinders 12 at two positions on the front and rear sides. The guide shaft support portion 7, 12 a, is disposed in at least one orthogonal slide tube portion 12, and is orthogonally held by fixing the orthogonal slide tube portion 12 to a desired position of the orthogonal slide guide shaft 10 by screwing or the like. It is a stopper of the part 7.
In FIG. 1 (b), 5b is a cutter support of the cutter holder 5 that supports the cutter body 20, 5c is a female screw portion standing on the cutter support 5b, and 13 is screwed to the female screw portion 5c at its lower end. The height adjusting unit of the cutter moving mechanism 4 that moves the cutter main body 20 up and down together with the cutter support 5b by rotating the combined ball spiral 13a, and 13b is a handle of the height adjusting unit 13 that manually rotates the ball spiral 13a. 13c is a sliding guide for standing on the cutter support 5b and slidably guides the cutter support 5b in the vertical direction with respect to the base 5a of the cutter holder 5, and 13d is standing on the base 5a. A cylindrical guide portion 14 that slidably holds the ball spiral 13a of the height adjusting portion 13, and 14 is a switch that is disposed in the cutter moving mechanism 4 and switches on / off of driving of the cutter body 20. It is a part.
For convenience of explanation, the handle portion 13 and the switch portion 14 are omitted in FIG.

The usage method of the concrete wall surface cutting device of Embodiment 1 comprised as mentioned above is demonstrated.
First, in FIG. 1, the concrete wall surface cutting device 1 is placed in accordance with the position of the opening 31 a of the concrete rod 31 that cuts the inner wall. The operation part 3b of each fixing tool 3 is rotated, and the contact part 3a is engaged with the periphery of the opening part 31a of the concrete basket 31, and the frame part 2 is fixed.
Next, the handle portion 13b of the height adjusting unit 13 is rotated to lower the rotary blade 21 of the cutter body 20 to a height at which the concrete ridge 31 is cut.
Next, while the switch 14 of the cutter body 20 is turned on and the rotary blade 21 is rotated, the cutter holder 5 is manually moved in the direction of arrow a along the parallel sliding guide shaft 8 of the parallel sliding holder 6. Move and cut the inner wall of the concrete wall 31 to a desired depth. The cutter body 20 is separately supplied with hydraulic pressure by connecting a hydraulic power unit (not shown) with a hose.
Next, the entire parallel sliding holding part 6 is moved manually along the orthogonal sliding guide shaft 10 of the orthogonal sliding holding part 7 in the direction of the arrow b, so that the concrete cage is parallel to the orthogonal sliding guide shaft 10. The inner wall of 31 can be cut. At this time, the depth of cut can be appropriately adjusted by human power, but if necessary, the parallel sliding cylinder portion 9 is fixed to the parallel sliding guide shaft 8 with a stopper 9a to keep the depth of cut substantially constant. You may do it.
Thereafter, the cutter body 20 can be sequentially moved along each side of the concrete cage 31 by the parallel sliding holder 6 and the orthogonal sliding holder 7 to cut the entire circumference of the inner wall of the concrete cage 31. it can.
After the cutting, the concrete wall cutting device 1 is removed, and the cutting part is lifted with a lifter, so that it can be cut off from the concrete fence 31 and removed.
When transporting the concrete wall surface cutting device 1, the parallel sliding cylindrical portion 9 and the orthogonal sliding cylindrical portion 12 are fixed to the parallel sliding guide shaft 8 and the orthogonal sliding guide shaft 10 by the stoppers 9a and 12a, respectively. By this, the cutter holding part 5 does not move back and forth, and right and left, it is possible to prevent the rotary blade 21 of the cutter body 20 from being damaged, and the handling and safety are excellent.

In the present embodiment, the frame portion 2 is fixed by engaging the contact member 3a formed in an L-shaped hook shape with the periphery of the opening portion 31a of the concrete basket 31 as the fixture 3. The tool 3 is not limited to this, and any tool that can fix the frame 2 to the periphery of the opening 31a of the concrete basket 31 may be used. For example, it may be fixed to the inner side of the receiving frame or the like of the concrete cage 31 by screwing or the like, or may be fixed to a pavement surface or the like around the opening 31a of the concrete cage 31 using a pile or an anchor.
In this embodiment, the stoppers 9a and 12a are provided on the parallel sliding cylinder part 9 and the orthogonal sliding cylinder part 12, respectively. However, the stopper slides the parallel sliding cylinder part 9 and the orthogonal sliding cylinder part 12. As long as it can be regulated as necessary, it may be attached to any position of the parallel sliding guide shaft 8 and the orthogonal sliding guide shaft 10 by screwing or the like independently of the parallel sliding cylindrical portion 9 and the orthogonal sliding cylindrical portion 12. Good.
Also, end stoppers that contact the end surfaces of the parallel sliding cylinder 9 and the orthogonal sliding cylinder 12 are provided at the ends of the parallel sliding guide shaft 8 and the orthogonal sliding guide shaft 10 to hold the cutter during cutting operation. The movement range of the part 5 is regulated, and the rotary blade 21 can be prevented from entering the soil on the outer periphery of the concrete fence 31.

The concrete wall surface cutting apparatus according to Embodiment 1 configured as described above has the following operations.
(1) Since the frame part is fixed to the periphery of the opening of the concrete fence, the frame part does not move back and forth and right and left, and can be prevented from lifting. When cutting the concrete wall surface by moving the wall along the inner wall of the concrete fence, there will be no misalignment or tilting of the cutter body, and no excessive load will be applied to the cutter body. The main body can be moved to reliably perform cutting work, and it is excellent in workability, labor saving, and work efficiency.
(2) The cutter moving mechanism includes a cutter holding part that holds the cutter body, a parallel sliding holding part that holds the cutter holding part slidably in a direction parallel to one side of the concrete fence, and a parallel sliding holding part. By having an orthogonal sliding holding part that is slidably held in a direction orthogonal to the sliding direction of the parallel sliding holding part, the cutter body is moved back and forth in a horizontal plane by the parallel sliding holding part and the orthogonal sliding holding part. Since it can be moved to the left and right, the cutting depth (cutting depth) can be adjusted freely, and with the rotary blade of the cutter body cut into the concrete wall at a predetermined depth, the parallel sliding holder or orthogonal By sliding the cutter body along the sliding direction of the sliding holder, each side of the concrete fence can be reliably cut at a certain cutting depth to obtain a clean cut surface. For stability and stability It is.
(3) The parallel sliding holding part has two parallel sliding guide shafts that are supported by the orthogonal sliding holding part at both ends and arranged in parallel, and the two parallel sliding parts that are arranged in the cutter holding part. By having a parallel sliding cylinder part slidably inserted on each guide shaft, the cutter holding part can be kept horizontal, and the cutter holding part does not skew when sliding, The concrete wall can be cut at a substantially constant depth, and the cutting reliability is excellent.
(4) The cutter holder can be smoothly moved manually along the parallel sliding guide shaft with a simple configuration in which the parallel sliding cylindrical portion is extrapolated to the parallel sliding guide shaft. Excellent mass productivity.
(5) The orthogonal sliding holding portion slides on each of the two orthogonal sliding guide shafts disposed on both sides of the frame portion orthogonal to the parallel sliding guide shaft and the two orthogonal sliding guide shafts. And a guide shaft support portion that supports both ends of the parallel slide guide shaft by means of an orthogonal slide cylinder portion that is movably inserted. The sliding direction is orthogonal, the cutter holder can be moved back and forth and left and right along the inner wall surface of the concrete fence, and the cutter holder is not tilted or skewed. The entire circumference can be cut at a substantially constant depth, and the cutting reliability and workability are excellent.
(6) With a simple configuration in which the orthogonal sliding cylinder is extrapolated to the orthogonal sliding guide shaft, the parallel sliding holding portion can be moved smoothly along the orthogonal sliding guide shaft manually. Excellent in productivity and mass productivity.

(Embodiment 2)
The concrete wall surface cutting device in Embodiment 2 is demonstrated. In addition, the thing similar to Embodiment 1 attaches | subjects the same code | symbol, and abbreviate | omits description.
FIG. 2A is a schematic plan view of the concrete wall surface cutting device according to the second embodiment, and FIG. 2B is a cross-sectional schematic side view of the main part of the concrete wall surface cutting device according to the second embodiment.
In FIG. 2, the concrete wall surface cutting device 1A in the second embodiment is different from the first embodiment in that the frame portion 2A is formed linearly along one side of the opening 31a of the concrete fence 31; A pressing spiral 3e that extends from the base plate portion 2a of the frame portion 2A as a fixture 3A, engages with the inner surface of the opening 31a of the concrete rod 31, and is screwed to the end portion of a tension member 3d formed by an angle or the like. The pavement surface fixing portion 3f is provided with two contact fixing portions 3c that are pressed in the step S3, and three pavement surface fixing portions 3f that extend outward from the substrate portion 2a and are fixed to the pavement surface 30 by the piles 3g being driven into the fixing holes. The point and the orthogonal sliding holding portion 7A are provided with only one orthogonal sliding guide shaft 10 disposed on the outside of the concrete cage 31 so as to be orthogonal to the parallel sliding guide shaft 8, and the parallel sliding holding portion 6A parallel sliding guide shaft One end side of the parallel sliding guide shaft 8 is supported by the end supporting portion 11a of the orthogonal sliding holding portion 7A and connected to the other end side of the parallel sliding guide shaft 8 from the connecting portion 11b to the outside of the concrete cage 31. A guide wheel 11d that contacts the pavement surface 30 is provided on the extended portion 11c.

The usage method of the concrete wall surface cutting device of Embodiment 2 comprised as mentioned above is demonstrated.
First, in FIG. 2, the frame part 2A of the concrete wall cutting apparatus 1A is placed in accordance with the position of any one side of the opening 31a of the concrete rod 31 that cuts the inner wall.
Next, a tension member 3d having a pressing spiral 3e screwed thereon is installed on two sides of the opening 31a of the concrete rod 31 orthogonal to the substrate portion 2a of the frame portion 2A, and the pressing spiral 3e is turned so as to be applied at the tip. The contact fixing part 3 c is pressed against the inner wall surface side of the concrete ridge 31. Further, the pile 3g is driven into the pavement surface 30 from the fixing hole of the pavement surface fixing portion 3f. As described above, the frame portion 2A of the concrete wall cutting apparatus 1A is fixed to the periphery of the opening 31a of the concrete wall 31.
Next, the handle portion 13b of the height adjusting unit 13 is rotated to lower the rotary blade 21 of the cutter body 20 to a height at which the concrete ridge 31 is cut.
Next, while the switch part 14 of the cutter body 20 is turned on and the rotary blade 21 is rotated, the cutter holding part 5 is manually moved in the direction of the arrow c along the parallel sliding guide shaft 8 of the parallel sliding holding part 6A. Move and cut the inner wall of the concrete wall 31 to a desired depth.
Next, the entire parallel sliding holding part 6A is moved manually in the direction of the arrow d along the orthogonal sliding guide shaft 10 of the orthogonal sliding holding part 7A. At this time, the other end side of the parallel sliding guide shaft 8 of the parallel sliding holding portion 6A is supported by the guide wheel 11d grounded on the pavement surface 30, and the parallel sliding holding portion is rotated by rotating the guide wheel 11d. 6A can be moved in parallel with the orthogonal sliding guide shaft 10 to cut the inner wall of the concrete fence 31. If the pavement surface 30 has irregularities or the like, the parallel sliding holding portion 6A can be smoothly guided by laying a flat guide plate or the like along the moving direction of the guide wheel 11d.
Thereafter, the frame portion 2A of the concrete wall cutting apparatus 1A is moved in accordance with the position of each side of the opening 31a of the concrete fence 31, and the above operation is repeated to cut each side of the concrete fence 31 one by one. it can.
Others are the same as those in the first embodiment, and thus description thereof is omitted.

In addition, the number and arrangement | positioning of the pavement surface fixing | fixed part 3f can be selected suitably.
In the present embodiment, a method of fixing the contact fixing portion 3c by screwing and a method of driving and fixing the pavement surface fixing portion 3f as the fixing tool 3A have been described, but the fixing tool is the frame portion 2A. It is only necessary to be able to prevent front / rear / right / left movement, and it is not necessary to use both methods in combination, either one method may be fixed, or other methods may be used in combination as appropriate. Good. For example, a method of fixing the pavement surface fixing portion 3f by pile driving and a method of screwing and fixing the sliding contact portion 3a of the first embodiment may be combined.

According to the concrete wall surface cutting device in the second embodiment configured as described above, in addition to the same functions as those obtained in the first embodiment (1) to (4), (6), the following functions are provided. Is obtained.
(1) The orthogonal sliding holding portion is slidable on one orthogonal sliding guide shaft disposed on one side of the frame portion orthogonal to the parallel sliding guide shaft and the orthogonal sliding guide shaft An end support portion for supporting one end of the parallel sliding guide shaft by an extrapolated orthogonal sliding cylindrical portion; and a guide wheel disposed on the other end of the parallel sliding guide shaft and grounded to the pavement surface. By having it, both ends of the parallel sliding guide shaft can be supported by the end supporter and the guide wheel, so the horizontal holding of the cutter holding part held by the parallel sliding holding part is maintained. The part can be moved along the orthogonal sliding guide shaft, and is excellent in labor saving and workability.
(2) Since the orthogonal sliding holding portion has only one orthogonal sliding guide shaft, the structure of the orthogonal sliding holding portion can be simplified, and the entire apparatus can be reduced in size and weight. Excellent handling, transportability and mass productivity.

(Embodiment 3)
A concrete wall surface cutting apparatus according to Embodiment 3 will be described. In addition, the thing similar to Embodiment 1 or 2 attaches | subjects the same code | symbol, and abbreviate | omits description.
3 is a schematic plan view of the concrete wall cutting apparatus according to Embodiment 3, FIG. 4 is a schematic cross-sectional view taken along line AA in FIG. 3, and FIG. 5 is a schematic view taken along line BB in FIG. It is sectional drawing. For convenience of explanation, the cutter moving mechanism 4B is omitted in FIG.
3 to 5, the concrete wall cutting device 1B of the third embodiment is different from that of the first embodiment in that a shackle for lifting and transporting the concrete wall cutting device 1B at four locations on the upper surface of the frame portion 2 is used. A point in which a hanging tool 2c such as an eyebolt is attached, and a point in which a fixing tool 3B prepared separately from the frame part 2 is passed through a gap at the bottom of the frame part 2 and fixed to the periphery of the opening 31a of the concrete fence 31 It is.
By attaching the hanger 2c to the frame part 2, the concrete wall surface cutting device 1B can be easily lifted to carry and carry out installation work, and is excellent in transportability.
Further, since the fixture 3B can be prepared separately from the frame portion 2 and can be attached only at the time of work, there is no extra protrusion during transportation and storage, and space saving and handling are excellent.

Next, in FIGS. 3 and 4, the cutter moving mechanism 4 </ b> B in the concrete wall cutting apparatus 1 </ b> B of the third embodiment is different from the first embodiment in that the base portion 5 a of the cutter holding portion 5 </ b> A is the same as that of the parallel sliding holding portion 6. A handle rotation mechanism that is disposed on the upper surface side, is different in the arrangement of the height adjustment unit 13 and the switch unit 14, and holds the operation handle 16 so as to be rotatable about the vertical axis with respect to the cutter holding unit 5A. And a display plate 17 that is formed in an arc shape at the tip of the operation handle 16 on the traveling direction side and indicates the tip position of the rotary blade 21.
3 and 4, 16a is a handle fixing portion of the operation handle 16 fixed to the handle rotating mechanism 15, and 16b is disposed at the rear end portion of the handle fixing portion 16a and is formed in a substantially U-shape. A handle holding portion 20a connected to the lower end portion of the handle main body 16c and foldably holds the handle main body 16c, and a hydraulic pressure supply pipe for supplying hydraulic pressure to the cutter main body 20.
The cutter moving mechanism 4B includes a handle rotation mechanism 15 that holds the operation handle 16 so as to be rotatable about the vertical axis with respect to the cutter holding portion 5A. The direction of the handle 16 can be easily changed, and the cutter holding portion 5A can be smoothly moved along the parallel sliding holding portion 6 or the orthogonal sliding holding portion 7. In addition, since the lower end part of the handle body 16c is foldably held by the handle holding part 16b, the handle body 16c can be folded during transportation and storage, and the handle body 16c does not get in the way and is excellent in compactness. .
Further, since the operation handle 16 has a display plate 17 which is formed in an arc shape at the front end portion on the traveling direction side and indicates the position of the front end of the rotary blade 21, the display is displayed when the operation handle 16 moves the cutter holding portion 5A. The work can be performed while confirming the position of the tip of the rotary blade 21 by the plate 17, and the rotary blade 21 is not cut too much, and the safety and workability are excellent.
In addition, arrangement | positioning of the height adjustment part 13 and the switch part 14 can be selected suitably.

Next, in FIGS. 3 and 5, the concrete wall cutting apparatus 1 </ b> B according to the third embodiment is different from the first embodiment in that the height (tilt) of the frame portion 2 is adjusted to one side portion of the frame portion 2. It is a point provided with the two frame height adjustment parts 18 using the jack for.
By adjusting the height (inclination) of the frame part 2 with the frame height adjusting part 18, the inner wall of the concrete fence 31 can be cut horizontally, and the workability is excellent.

Next, details of the handle rotation mechanism of the concrete wall cutting apparatus according to Embodiment 3 will be described.
FIG. 6 is a schematic cross-sectional view of a main part showing a handle turning mechanism of the concrete wall cutting apparatus according to the third embodiment.
In FIG. 6, 15 a is an eight rod portion of the handle rotating mechanism 15 that is circumferentially provided on the upper surface of the base portion 5 a of the cutter holding portion 5 A and screwed and fixed with a fixing bolt 19 a, and 15 b is formed in a ring shape. The support plate 15c of the handle rotation mechanism 15 is fixed to the upper end of the rod portion 15a by a fixed helix 19b and connected to the base 5a. The handle rotation 15c is formed in a ring shape and disposed on the upper surface side of the support plate 15b. The handle base 15d of the mechanism 15 is formed in a ring shape having an L-shaped cross section, and is disposed on the outer periphery of the bottom of the support plate 15b. The handle 15 is clamped to the handle base 15c with a fixing bolt 19c, thereby holding the support plate 15b. The base support 19d of the rotation mechanism 15 is screwed with the handle fixing portion 16a of the operation handle 16 on the upper surface of the handle base 15c. Is a fixed spiral to stop fixed.
The handle base 15c and the base support 15d rotate with respect to the support plate 15b by sandwiching the outer periphery of the support plate 15b connected to the base 5a of the cutter holding portion 5A from above and below by the handle base 15c and the base support 15d. Since it is held freely, the operation handle 16 can be rotated around the vertical axis with respect to the cutter holding portion 5A, and the cutter holding portion 5A can be slid back and forth and left and right.

The method of using the concrete wall cutting apparatus according to the third embodiment configured as described above is that the operation handle 16 is rotated in accordance with the traveling direction of the cutter body 20 when the cutter holder 5A is moved. Since it is the same as that of Embodiment 1, description is abbreviate | omitted.
In the present embodiment, only the operation handle 16 is rotated about the vertical axis with respect to the cutter holding portion 5A. However, the operation handle 16 and the cutter body 20 are connected to the cutter holding portion 5A. On the other hand, the cutter body 20 and the operation handle 16 can be rotated around the vertical axis.

According to the concrete wall surface cutting device in the third embodiment configured as described above, in addition to the same operation as that obtained in the first embodiment, the following operation is provided.
(1) Since the cutter moving mechanism is provided with a handle rotating mechanism that holds the operation handle so as to be rotatable about the vertical axis with respect to the cutter holding portion, the handle rotating mechanism according to the traveling direction of the cutter body. By rotating the operation handle with, and changing the direction, the cutter body along with the parallel sliding holding part or the orthogonal sliding holding part can be moved smoothly together with the cutter holding part, and the concrete fence cutting work can be performed. Excellent efficiency and labor saving.

  The present invention has a simple configuration, is not bulky, has excellent transportability and handling properties, can support the cutter body horizontally, has a low load on the rotary blade during cutting, and can be smoothly moved by human power. The cutting work can be done in a short time by moving it, there are few uncut corners, and the entire circumference can be cut at a substantially uniform depth to obtain a clean cut surface. The removal work can be done easily, providing a concrete wall cutting device that excels in labor saving and workability, and contributes to the improvement of maintainability of concrete dredging such as water collecting dredging on the paved surface of highways. it can.

1, 1A, 1B Concrete wall cutting device 2, 2A Frame part 2a Substrate part 2b Peripheral wall part 2c Suspension tool 3, 3A, 3B Fixing tool 3a Abutting part 3b Operating part 3c Abutting fixing part 3d Pushing material 3e Surface fixing part 3g Pile 4, 4A, 4B Cutter moving mechanism 5, 5A Cutter holding part 5a Base part 5b Cutter support 5c Female screw part 6, 6A Parallel sliding holding part 7, 7A Orthogonal sliding holding part 8 Parallel sliding guide Shaft 9 Parallel sliding tube portion 9a Stopper 10 Orthogonal sliding guide shaft 11 Guide shaft support portion 11a End support portion 11b Connection portion 11c Extension portion 11d Guide wheel 12 Orthogonal sliding tube portion 12a Stopper 13 Height adjustment portion 13a Ball Spiral 13b Handle portion 13c Sliding guide portion 13d Cylindrical guide portion 14 Switch portion 15 Handle rotation mechanism 15a Rod portion 15b Support plate 15c Han Base 15d Base support 16 Operation handle 16a Handle fixing part 16b Handle holding part 16c Handle main body 17 Display board 18 Frame height adjusting part 19a, 19c Fixing bolt 19b Fixing spiral 19d Fixing spiral 20 Cutter main body 20a Hydraulic supply pipe 21 Rotary blade 30 Pavement surface 31 Concrete fence 31a Opening

Claims (5)

A concrete wall cutting device for cutting an inner wall of a square concrete fence installed on a pavement surface,
A frame part that is fixed to the periphery of the opening of the concrete fence, and a cutter movement mechanism that is disposed on the frame part and moves the cutter body along the inner wall of the concrete fence in a horizontal plane, and the cutter movement mechanism A cutter holding part for holding the cutter body, a parallel sliding holding part for holding the cutter holding part slidably in a direction parallel to one side of the concrete fence, and the parallel sliding holding part for the parallel A concrete wall surface cutting apparatus comprising: an orthogonal sliding holding portion that is slidably held in a direction orthogonal to a sliding direction of the sliding holding portion. The parallel sliding holding portion has two parallel sliding guide shafts supported at both ends by the orthogonal sliding holding portion and arranged in parallel, and the two parallel sliding guides arranged at the cutter holding portion. The concrete wall cutting device according to claim 1, further comprising a parallel sliding cylinder portion slidably inserted on each of the dynamic guide shafts. The orthogonal sliding holding portions are respectively provided on two orthogonal sliding guide shafts disposed on both sides of the frame portion orthogonal to the parallel sliding guide shaft and on the two orthogonal sliding guide shafts. 3. A concrete wall cutting apparatus according to claim 2, further comprising a guide shaft support portion that supports both end portions of the parallel sliding guide shaft by means of orthogonal sliding cylinder portions that are slidably inserted. . The orthogonal sliding holding portion is slidable on one orthogonal sliding guide shaft disposed on one side of the frame portion orthogonal to the parallel sliding guide shaft and the orthogonal sliding guide shaft An end support portion that supports one end side of the parallel sliding guide shaft by an orthogonal sliding cylinder portion that is extrapolated to the guide, and a guide that is disposed on the other end side of the parallel sliding guide shaft and contacts the pavement surface A concrete wall cutting device according to claim 2, comprising a ring. 5. The handle moving mechanism according to claim 1, wherein the cutter moving mechanism includes a handle rotating mechanism that holds the operation handle so as to be rotatable about a vertical axis with respect to the cutter holding portion. The concrete wall cutting apparatus according to claim 1.