JPH07229158A - Construction method of keeping and repairing manhole iron cover, and cutter therefor - Google Patents

Abstract

PURPOSE:To cut a groove with optional size and angle position, and simplify the system. CONSTITUTION:A feed handle 18 is rotated to position an end mill T in an optional radius distance position with an iron cover 2 set on a road as the center on the pavement surface. A rotating handle 32 is further rotated to position a groove cutting position to an optional cutting angle. The end mill T is rotated by a tool driving motor 51 to work the groove on the pavement. The iron cover 2 and an iron cover receiving frame are removed, and a new iron cover receiving frame is set with its height being regulated, and the pavement part is restored with ES concrete and cured, whereby the repairing is completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for maintaining and repairing a manhole iron lid using a cutting cutter. More specifically, the paving road surface around the manhole iron cover is circularly cut by a dry cutter that does not use coolant with an end mill, chainsaw, etc., and the manhole iron and the paving road surface around it are integrally removed. This is related to the method for maintaining and repairing human-hole iron-rael with a cutting cutter to be restored.

[0002]

2. Description of the Related Art A manhole iron cover (hereinafter referred to as a manhole) is installed on a road surface for sewage, tap water, communication and electric power. Manholes must be replaced and repaired as they become obsolete. Epo method (registered trademark, Japanese Patent Publication 6) that enables this exchange quickly and while ensuring the safety of traffic and construction.
The present inventor has proposed such as No. 3-55562). This Epo method is used for paving around the circular manhole (surface, base,
(Road base), if necessary, after cutting the roadbed into a circle with a hole saw, the manhole and surrounding asphalt block are integrally pulled up and removed.

An annular precast concrete ring and ES concrete which is an epoxy resin concrete are used for height adjustment and restoration of the road surface and the upper surface of the manhole. This use not only shortens the construction time, but also enhances the durability after construction due to the characteristics of the material. The circular cutter used in this Epo method is a type of cutter called a hole saw, which is composed of a cylindrical body and a diamond tip attached to the tip.

Diamond chips are produced by cutting pavement by grinding. For this reason, a coolant is required for cutting the diamond tip and discharging grinding dust, and water is used during cutting. Water is being washed off the road without being collected. Construction on a road surface with good drainage is not a problem, but on roads without drainage channels, water, asphalt that constitutes the pavement, and grinding debris from aggregates will flow to the surroundings, which will pollute the environment. A tank mounted on the truck for coolant is also required.

The cut surface by grinding is a smooth surface due to the nature of grinding. This smooth surface is aesthetically pleasing, but its compatibility with ES concrete is not necessarily good at the time of subsequent restoration work. Further, since the cut surface is weak against shear stress due to the small number of irregularities, a depression, a step, or a crack may occur after restoration. . At the time of restoration work after completion of cutting, it is necessary to dry the wet cut surface of the road with a burner or the like in order to improve adhesion, and then apply a primer to use ES concrete.

Therefore, it is desirable not to use liquid such as water for the coolant as much as possible. In addition, the hole saw type cutter is a type that cuts asphalt and concrete by grinding, so the back force is
That is, since the force of floating on the upper surface acts, it is necessary to press the cutter toward the pavement with a strong force.

For this pressurization, the cutter is fixed to the road surface by the crane of the mobile crane, and the hydraulic piston of the hydraulic unit mounted on the mobile crane is operated to pressurize the cutter to perform the cutting process. For this reason, a crane vehicle and a hydraulic unit are required, and it is inevitable that the device will be large. Further, it is necessary to prepare a plurality of circular cutters depending on the diameter of the manhole.

For this reason, the present inventor has proposed a circular cutting method using a disk-shaped blade (Japanese Patent Laid-Open No. 59-72325).
issue). However, since a disk-shaped cutter is used, precise arc cutting cannot be performed. That is, the flank cannot be secured by the disc blade. There are problems such as not being able to adjust the size of the cutting diameter and changing the cutting angle. Further, there is the above-mentioned problem due to cutting by grinding.

[0009]

The present invention has been invented based on the above technical background, and achieves the following objects.

An object of the present invention is to provide a manhole iron cover maintenance repair method and a cutting cutter for the manhole iron cover maintenance repair method, in which the cutting radius and angle of the pavement around the manhole can be arbitrarily changed. It is in.

Still another object of the present invention is to provide a hole iron lid maintenance repair method and a cutting cutter for the hole iron lid maintenance repair method which can be realized by a simple system in the human hole iron lid maintenance repair method.

[0012]

In order to achieve the above-mentioned object, the present invention adopts the following means and operation.

That is, according to the present invention, a closed loop groove is formed in a pavement portion by a rotary cutting tool at an arbitrary radial distance position around the iron lid or the iron lid receiving frame installed on a road and at an arbitrary cutting angle. Cutting step, removing step for removing the iron lid, the iron lid receiving frame and the pavement part, adjusting the height of a new iron lid receiving frame and installing it, and adjusting for restoring the pavement part. It is a human hole iron lid maintenance repair method using a cutting cutter, which comprises a restoration step and a curing step for curing the restored pavement portion.

It is more effective that the rotary cutting tool is an end mill.

When the center angle of the groove forms an acute angle with the surface including the road surface, the cutting angle increases the strength of the paved portion after restoration.

[0016] By drilling first with a drill at the groove cutting start position, groove processing by an end mill can be performed smoothly.

A cutting cutter having the following structure is used for the method of maintaining and repairing a manhole iron cover by a cutting cutter.

Rotation supporting means fixed to the iron lid or the iron lid receiving frame, a frame rotatably provided by the rotation supporting means, a feed table movably provided on the frame, and the feed table. Drive means for driving the carriage in a first direction along the frame, and a swivel provided on the feed table and rotatable about a first swivel axis that is perpendicular to the first direction. A platform, a swing drive means for driving the swing platform around the first swing axis, and a second drive unit provided on the swing platform and perpendicular to the first direction.
The cross platform movable in any direction and the cross platform
Driving means for driving in the direction, a tool spindle rotatably provided on the cross base, a tool rotation driving means for rotationally driving the tool spindle, and a cutting tool chucked by the tool spindle. It is a cutting cutter consisting of.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing the outer appearance of a dry cutting cutter 1 used in a method for maintaining and repairing a manhole iron lid using a dry cutting cutter. 2 is a front view of the cutting cutter of FIG.
3 is a plan view of FIG. 2, FIG. 4 is a right side view of FIG. 2, and FIG. 5 is a cross-sectional view taken along the line VV of FIG.

The manhole iron cover 2 is made of cast iron, and the adsorbent 3 is adsorbed on the iron cover 2. Adsorbent 3
A permanent magnet is built therein, and this permanent magnet is attracted to the upper surface of the iron lid 2 of the manhole. The release of the attraction of the permanent magnet to the upper surface of the manhole 2 is performed by turning the handle 4 provided on the side surface of the attraction body 3. Since the permanent magnet attracting and releasing mechanism is a known mechanism, detailed description thereof will be omitted. A cylindrical portion 5 having an open upper surface is integrally provided on the upper portion of the adsorbent 3. A lower end portion of a central shaft 8 is rotatably provided vertically on the cylindrical portion 5 via a bearing 7. The upper end of the center shaft 8 is Y-shaped, and one upper end of the frame 9 is swingably supported by a pin 10.

The pin 10 penetrates the central shaft 8 and one end of the frame 9 and can be removed when not in use.
Four guide rails 11 are integrally arranged on the frame 9. A feed table 12 is movably mounted on a linear bearing 17 on the four guide rails 11. One end of a radial feed screw 13 is rotatably supported by a bearing 14 between the four guide rails 11. The other end of the radial feed screw 13 is rotatably supported by a bearing 16 on an apron 15 fixed to the front end of the frame 9, and a feed handle 18 is connected to the end thereof.

A nut 20 is screwed into the radial feed screw 13 (see FIG. 5). The nut 20 is the feed table 12
Are connected to each other via a connecting portion 21. Eventually, by rotating the feed handle 18, the radial feed screw 13 is rotationally driven to move the feed base 12 along the four horizontal guide rails 11 of the frame 9. A worm wheel box 25 is integrally fixed to the feed base 12 with bolts 26.

A worm wheel 27 is built in the center of the worm wheel box 25, and a central shaft 28 of the worm wheel 27 is rotatably supported by a bearing 29 in the worm wheel box 25. The worm wheel 27 meshes with the worm 30. Warm 3
0 is fixed to the worm shaft 31, and the worm shaft 31 is rotatably supported by the worm wheel box 25.

A turning handle 32 is provided at one end of the worm shaft 31.
Are connected. When the turning handle 32 is rotated by hand, the worm wheel 27 is rotated. A flange 35 is formed on one end of the central shaft 28 of the worm wheel 27, and the flange 35 is connected to a swivel base 36.
The swivel base 36 has the worm wheel 3 centered on the central axis 28.
When it is 0, it is turned to the required angular position (centering on the axis a). Two guide rails 37 are arranged in parallel on the front surface of the swivel base 36.

The guide rails 37, 37 are mounted movably up and down via a linear bearing 39 fixed to a cross base 38. A connecting rod 40 is integrally provided on the lower surface of the cross base 38. A servo motor 41 is fixed to the upper end of the swivel base 36. Output shaft 42 of servo motor 41
Is connected to the feed screw 43. The feed screw 43 is screwed into a ball nut 44 fixed to the connecting rod 40.

A spindle head 50 is mounted on the cross base 38. A tool drive motor 51 is fixed to the upper part of the spindle head 50. An output shaft 52 of the tool drive motor 51 is connected to a tool spindle 54 via a joint 53. The tool spindle 54 is rotatably supported by a bearing 55 on the spindle head 50. A collet chuck 56 is provided at the lower end of the tool spindle 54, and the end mill T is attached to the collet chuck 56.
Is chucked. The end mill T has a cemented carbide or ceramic blade. Collet chuck 5
Reference numeral 6 is a known chuck of the type which is rotated and tightened from the tool side. On the other hand, the lower part of the apron 15 has a protrusion 6
0 is provided integrally.

A vertical feed handle 61 is rotatably provided on the protrusion 60, and is connected to a feed screw (not shown) on the vertical feed handle 61, and the feed screw is housed in a support cylinder 62. . A caster 63 is arranged below the support cylinder 62. Eventually, the vertical feed handle 61 is turned to swing the frame 9 around the pin 10. By this swing, the depth of cut of the end mill T into the pavement can be adjusted.

One end of a handle 64 is fixed to the upper part of the apron 15. The handle 64 is used by an operator to hold the handle 64 by hand and rotate the frame 9 around the central axis 8 inserted into the cylindrical portion 5.

Maintenance and repair of manhole iron lid by dry cutting cutter
Construction Method Hereinafter, an outline of the human hole iron lid maintenance repair construction method by the cutting cutter and the operation of the cutting cutter will be described. (A) Circle-cutting process The adsorption body 3 is placed on the central upper surface of the iron lid 2 to be replaced, and the handle 4 is operated to adsorb and fix the permanent magnet inside. The central shaft 8 is inserted into the bearing 7 of the adsorbent 3. Radial lead screw 1 by rotating the feed handle 18
Rotate 3. By the rotation of the radial feed screw 13,
The feed table 12 moves on the horizontal guide rail 11.

When the feed table 12 reaches the desired position, the feed table 12 is stopped at that position. Furthermore, the turning handle 32
Rotate the worm 30, worm wheel 2
7 is rotated and the central shaft 28 is rotated (see FIG. 5). Due to the rotation of the central shaft 28, the swivel base 36 is swung about the axis a. This turning angle is set to an angle θ as shown in FIG. After the angle θ is restored, paving 7
4 (see FIG. 6) is designed to withstand the load of the vehicle.

Next, the servo motor 41 is driven to rotate the feed screw 43 to move the cross base 38 to the guide rails 37, 3.
Lower along 7. At this time, the tool drive motor 51 drives the tool T to rotate. Also, the tool T at this time
Is equipped with a drill. The reason for this is to open a processing start hole (see FIG. 1) H for starting processing.
When the boring of the processing start hole H is completed, the servo motor 41 is again rotated in the reverse direction to move the cross base 38 upward.

Thereafter, the collet chuck 56 is loosened and the end mill tool T is mounted. The servo motor 41 is driven again to rotate the feed screw 43 to lower the cross base 38 along the guide rails 37. The tool drive motor 51 rotationally drives the end mill tool T to move the handle 6
Grasp 4 and rotate the frame 9 around the bearing 7. The side surface of the end mill tool T mainly cuts the surface layer and the base layer portion of the pavement 70, and the slit S is cut. The cutting is completed when the outer circumference of the iron lid 2 is completed. It should be noted that the cutting dust is disposed by using a vacuum dust suction device (not shown) with the suction port arranged near the end mill T. (B) Removal step Next, the iron lid 2, the iron lid receiving frame 71, and the pavement 7 around the iron lid 2
0 is removed by an appropriate method. Alternatively, this removal method is carried out by introducing a hydraulic removal machine (actually No. 62-100984), which has a steel wedge attached to the tip of the cylinder proposed by the present inventor, into the lower portion of the iron lid frame. Alternatively, a method may be used in which the surrounding asphalt lumps are pulled out to the upper part by a truck crane and loaded directly into the collection vehicle. The state of FIG. 6B is a sectional view showing this removed state. However, if the adjusting material 72 is deteriorated, it is removed for replacement. (C) Adjustment / restoration process Clean the surrounding area after removal. The height of the iron lid receiving frame 71 is adjusted by precast concrete, and the fine adjustment is performed by using epoxy resin concrete called ES concrete. Place a new iron lid 2 in place. ES concrete is also used in the restoration process. ES concrete is
Curing time is short and rising strength is also obtained. A circular arc compactor whose rolling plate has the same circular shape as the restored part
No. 97912). Finally, the inner surface of the human hole 73 is coated with mortar. (D) Curing step When each of the above steps is completed, curing is performed. The curing time varies depending on the outside temperature, but if the outside temperature is 10 ° C or higher, the curing time is about 40 minutes by natural curing. When the temperature is 10 ° C. or less, curing of the ES concrete 74 is promoted by warm air curing with a jet heater.

[Other Embodiments] In the above embodiments, the cross base 38 is fed by the servo motor 41, but a hydraulic cylinder may be used for this drive. Although the cutting step is performed at the angle θ, it may be cut vertically according to circumstances. Although the cutting cutter does not use coolant, it may use air or water depending on the case. The coolant is supplied from, for example, a water tank mounted on a truck around the tool T. In the above-mentioned embodiment, the pavement is formed by cutting the groove into an arc, but the pavement is not limited to a circle, but may be a closed loop such as an ellipse or a quadrangle.

In the above embodiment, the cylindrical portion 5 is formed by magnetizing the iron lid.
However, instead of this method, it may be fixed to the iron lid receiving frame by a mechanical clamp or hydraulic clamp means.

[0035]

As described above in detail, according to the present invention, since a groove can be formed by a cutting cutter at an arbitrary radial distance position around an iron lid or an iron lid receiving frame installed on a road, a plurality of tools are prepared. There is no need and the whole system can be downsized. Since the groove can be processed at an arbitrary cutting angle, it is unlikely that depressions, steps, or cracks will occur after restoration.

[Brief description of drawings]

FIG. 1 is a diagram showing an external appearance of a cutting cutter used for a human hole iron lid maintenance repair method using a cutting cutter.

FIG. 2 is a front view of the cutting cutter of FIG.

FIG. 3 is a plan view of FIG.

FIG. 4 is a right side view of FIG.

5 is a cross-sectional view taken along the line VV of FIG.

FIG. 6 is a diagram showing a construction sequence of a human hole iron lid maintenance repair method using a cutting cutter.

[Explanation of symbols]

 1 ... Cutting cutter 2 ... Iron lid 3 ... Adsorbent 5 ... Cylindrical part 8 ... Center axis 9 ... Frame 11 ... Guide rail 12 ... Feeding base 13 ... Radial feed screw 18 ... Feeding handle 25 ... Worm wheel box 36 ... Revolving Table 38 ... Cross table 50 ... Spindle head 56 ... Collet chuck 61, 64 Handle

Claims (5)

[Claims] 1. A cutting step of processing a closed loop groove in a pavement portion with a rotary cutting tool at an arbitrary radial distance position around the iron lid or the iron lid receiving frame installed on a road and at an arbitrary cutting angle. And a removal process for removing the iron lid, the iron lid receiving frame, and the pavement part, and an adjustment / restoration process for adjusting the height of a new iron lid receiving frame and installing it to restore the pavement part. A method of maintaining and repairing a manhole iron lid with a cutting cutter, which comprises a curing step for curing the restored pavement portion. 2. The method for maintaining and repairing a manhole iron lid with a cutting cutter according to claim 1, wherein the rotary cutting tool is an end mill. 3. The method of claim 1 or 2, wherein the cutting angle is such that the center surface of the groove forms an acute angle with the surface including the road surface. 4. The method for maintaining and repairing a manhole iron cover with a cutting cutter according to claim 1, wherein the first hole is drilled at the groove cutting start position. 5. A rotation supporting means fixed to the iron lid or the iron lid receiving frame, a frame rotatably provided by the rotation supporting means, a feed table movably provided on the frame, A first drive means for driving the feed table in a first direction along the frame; and a turntable provided on the feed table and rotatable about a first turning axis that is perpendicular to the first direction. A swivel base, a swivel drive means for driving the swivel base around the first swivel axis, and a cross base provided on the swivel base and movable in a second direction perpendicular to the first direction. A second drive means for driving the cross base in the second direction, a tool spindle rotatably provided on the cross base, a tool rotation drive means for rotationally driving the tool spindle, Chucked on the tool spindle A cutting cutter used in the method for maintaining and repairing a manhole iron lid, which consists of a cutting tool.