JPH1037125A - Movable device for cutting off manhole casing in coating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for cutting off a manhole casing by a simple way quickly and correctly without a large-scaled manual operation. SOLUTION: This movable device for cutting off the enclosure of a cover well in an asphalt coating 10 in which the base part 16 is hung by a trailer 72 and arranged rotationally movably around a vertical center line 14, is provided with a support plate 4 centeringly arranged on a manhole cover 6, a bracket component 18 arranged adjustably in the radial direction according to the base part 16 and the center line 14, a support bracket 26 arranged adjustably in height for a rotary cutting unit driven by an internal combustion engine 38, and a rotary motor 54 inserted between the base part 16 and the support plate 4. Hereat, a rapidly rotating cutting blade 44 is rotated along the edge of the enclosure of the cover well by the rotary motor 54.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a movable device for separating a manhole casing in a coating, mainly an asphalt coating.

[0002]

2. Description of the Prior Art To separate covers and / or manhole casings from asphalt coatings for replacement and / or leveling of covers, for example manhole covers anchored in concrete or asphalt coatings, for sewage, district heating, etc. In addition, relatively extensive and time-consuming manual work is usually required, which is usually done by pneumatic tools. DE-A1-3319586
The publication discloses a milling device for providing a groove around a manhole casing having an anchoring or centering part adapted to be tightened into an open manhole opening. In addition, the milling device was adapted to rotate manually around an open manhole casing to mill a groove around the manhole, so that the milling device was supported on wheels at a predetermined distance from the device to the ground. It has a projecting support beam.

[0003]

An object of the present invention is to provide an apparatus for separating a manhole casing in a coating, for example, an asphalt coating, in which the separation of the manhole casing is performed in a quick, accurate and simple manner without extensive manual work.

[0004]

SUMMARY OF THE INVENTION A mobile device according to the present invention includes a support plate centered above or on a manhole cover, and a radially adjustable base plate and center axis. A mounted bracket part, a support bracket whose height can be changed according to the bracket part for the rotary cutting unit driven by the internal combustion engine, and a rotary motor inserted between the base and the support plate It is characteristic in having the following. As a result, a movable device is achieved, and the manhole casing can be automatically separated with a simple configuration. The device is placed exactly in the center of the cover, after which the form of combustion engine starts the preferred drive motor. The rotating motor causes the rapidly rotating cutting blade to rotate along the edge of the manhole casing, while the cutting unit moves slowly downward until the manhole casing is separated from the coating. Obviously, the device consists of an electric motor whose rotary motor is driven by a generator, the generator being driven by the internal combustion engine and being connected to the battery via an electronic control unit.

[0005] In the level adjusting mechanism of the cutting unit of the apparatus according to the present invention, the support bracket is disposed on the vertical guide rod member of the bracket component, the hydraulic support cylinder is inserted between the bracket component and the support bracket, and the cylinder is provided with a liquid. It is preferable that the configuration is such that the working fluid is supplied from the tank via a manual pump. More obviously, a regulating valve adapted to control the lowering of the cutting unit is inserted between the support cylinder and the liquid tank. The rotation mechanism of the device is such that the support plate around the center bearing housing has a rim or gear wheel, and the rim or gear wheel and the pinion are surrounded by a roller chain, so that the rim or gear wheel has a drive wheel in the form of a pinion. Preferably, the arrangement is simple and robust in that it is drivingly connected to the rotary motor via the motor. For optimal decoupling of the coverwell enclosure, the device according to the invention is preferably arranged in such a way that the blades of the cutting unit are slightly inclined downwardly inward according to the vertical central axis. To ensure good contact between the cover and the support plate, the device includes a downwardly projecting gripping member on the underside of which the support plate engages the recessed top side of the cover. It is preferable to have a configuration having the same.

For use in improving circular holes in coatings, for example asphalt or concrete coatings, the device according to the invention prevents rotation of the support plate when the support plate is placed on its underside and on a smooth surface. It is preferred to have a configuration with a friction coating that is made as described above.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A cover cutting device shown in FIG.
And the cover 6 is arranged on a manhole casing 8 anchored to an asphalt coating 10. The support plate 4 is on the top side of the base 16 provided with a bearing housing 12 for a central bearing pivot 14. Bracket component 18 with vertical portion 20
Are fixed to the top side of the base 16 so as to be movable in the radial direction between the guide rails 22 made of angle steel, and the guide rails can push the bracket component 18 to a desired position toward the top side of the base 16. The vertical part 20 has a guide rod member 24, and the support bracket 26 is fixed on the guide rod member 24 by a sliding rod member 28 so that the level thereof can be adjusted. A hydraulic support cylinder 30 is inserted between the bracket part 18 and the upper part of the support bracket 26 and is connected to a hydraulic fluid tank 32 via a manual pump 34. When the support bracket 26 supplies the hydraulic fluid to the support cylinder 30, , Lifted upward by a manual pump 34. Thereafter, when the support bracket 26 stores the hydraulic fluid in the tank 32 via the regulating valve 36, the support bracket 26 is moved downward, and the support bracket 26 can descend considerably slowly according to the base 16.

A complete combustion engine 38 is mounted on the support bracket 26 and is drivingly connected to a cutting unit 42 with a cutting blade 44 via a V-belt 40, and the cutting blade 44 is directed downward and inward according to the vertical center axis of the apparatus. Lean slightly. The cutting blade 44 is partially surrounded by a cover 46, and cooling water is supplied by the cover 46 from a water container 48 via a supply pipe 50 and a branch 52 to the blade 44.
Supplied on both sides. The base 16 includes an electric rotating motor 54.
The motor 54 is connected via a pinion 56 to a rim or gear wheel 58 fixed to the outside of the bearing housing 12 by a roller chain 60, and the roller chain 60 surrounds the rim or gear wheel 58 and the drive pinion 56. The electric rotary motor 54 includes electricity from a generator 62 driven directly from the combustion engine 38, and the generator 62 is connected to the battery 6 via an electric control device.
4 and can also deliver a starting current to an electric starting motor for the combustion engine 38. The electrical control of the rotary motor 54 can be adjusted in particular. A horizontal counterweight 49 is located at the rearmost position behind the water container 48 and can balance the weight of the movable cutting unit 42, which is movable rearward, as indicated by the arrow 51.

The base 16 of the cover cutting device 2 has an upwardly projecting support bracket 68 with inclined support braces 70, 72, and as shown by the dotted line in FIG. 1, the cutting device 2 has a laterally projecting carrier. A pivot 76 allows the trailer 74 to hang as a unit. When the traction arm device 75 shown in FIG. 1 swings to a substantially vertical position, the support plate 4 is located at the lowest position, and is disposed on the manhole cover as an example, while the traction arm device 75 is moved downward to the horizontal drive position. The base 16 and the support plate 4 are freely lifted off the ground. During operation of the cutting device 2, the trailer 74 is free to couple with the pivot 76 and is completely removed from the cutting device 2 when located on the manhole cover 6 (FIG. 1). The traction arm device 75 may likewise be locked to the cutting device 2 in the vertical operating position as well as in the horizontal transfer position. The cover cutting device according to the invention operates in the following manner. As shown in FIG. 1, the cover cutting device 2 is arranged, for example, by a truck crane centered on the cover 4 and with the cutting unit 42 in the position shown, the combustion engine 38 is controlled by an electric starting motor by a control board. It is preferably activated via 66.
The return of the working liquid from the support cylinder 30 is about 4
The regulating valve 36 is adjusted so that it takes a while, ie the descent speed of the support bracket 26 is pre-adjusted accordingly. The rotation motor 54 is started, and the number of rotations is further adjusted by the control board 66 to, for example, about 10 rotations per minute.

Thereafter, the rapid-rotation cutting blade 44 creates a groove 77 (FIG. 2) in the asphalt coating around the manhole casing 8 while the base 16 rotates slowly around the support plate 4 and further asphalts it. Release from the coating 10, so that the manhole casing 8 is easily picked up and changed to a new modification level, since the above-mentioned operation occurs very often in connection with the renewal of the asphalt coating 10. As shown in FIG. 3, the cover cutting device 2 can of course also be used to cut off the rectangular manhole casing 78 and can be replaced by a circular manhole which fits into a cutout made subsequently. With a suitable choice of cutting blades, the device according to the invention can be more generally used to make circular cuts in other types of coatings, such as concrete or paving stone coatings. It is possible, in principle, to make circular cutouts in horizontal parts of the building or even on steel decks, using similar principles. Finally, it should be pointed out that the support plate of the cutting device is preferably of the same dimensions as the cover, since after the cover is removed, the support plate of the cutting device is placed directly in the manhole casing opening.

[Brief description of the drawings]

FIG. 1 is a side view, partially in section, of an embodiment of the device according to the invention, arranged on a manhole cover.

FIG. 2 shows a method for separating a circular manhole casing with the device according to the invention.

FIG. 3 shows that the device according to the invention can also be used for separating rectangular manhole casings.

[Explanation of symbols]

 2 Movable device 4 Support plate 6 Manhole cover 14 Center axis 16 Base 18 Bracket parts 26 Support bracket 30 Hydraulic support cylinder 34 Manual pump 36 Adjusting valve 38 Internal combustion engine 42 Rotation cutting unit 54 Rotation motor 58 Gear wheel 60 Roller chain 62 Generator 74 Trailer 75 traction arm device

Claims (9)

[Claims] 1. A method for separating a manhole casing from a coating, mainly an asphalt coating, wherein a base (16) hangs on a trailer (74) and is rotatably arranged around a vertical central axis (14). Mobile
In (2), the movable device (2) is a manhole cover.
(6) A support plate (4) arranged above or on the cover (6), and arranged so as to be adjustable in the radial direction according to the base (16) and the center axis (14). A bracket part (18) and a support bracket (26) for a rotary cutting unit (42) driven by an internal combustion engine (38), the height of which is changeable according to the bracket part (18); A movable device comprising a rotary motor (54) inserted between the base (16) and the support plate (4). 2. The rotating motor comprises an electric motor (54) driven by a generator (62), the generator being driven by an internal combustion engine (38) and a battery (64) via the control device. 2. The device according to claim 1, which is connected to
. 3. The support bracket (26) is disposed on a vertical guide rod member (24) of the bracket part (18), and a hydraulic support cylinder (30) is provided with the bracket part (18) and the support. The device according to claim 1, inserted between the bracket (26) and the cylinder (30) having the working liquid from the liquid tank (32) via a manual pump (34).
(2). 4. The control valve according to claim 1, wherein the adjusting valve is provided on the support cylinder.
The device (2) according to claim 3, wherein the device (2) is inserted between the (30) and the liquid tank (32) to control the lowering of the cutting unit (42). 5. The support plate (4) around a central bearing housing is provided with a rim or gear wheel (58) drivingly connected to the rotary motor (54) via a drive wheel (56) in the form of a pinion. Device (2) according to claim 1, wherein the rim or gear wheel (58) and the pinion are surrounded by a roller chain (60). 6. The apparatus (2) according to claim 1, wherein the blades of the cutting unit (42) are slightly inclined downwardly inwardly according to the vertical central axis (14). 7. The support plate (4) has a lower surface,
2. The device (2) according to claim 1, further comprising a downwardly projecting gripping member adapted to engage a shaped top recess of the cover (6). 8. The support plate (4) has a lower surface,
Device according to claim 1, having a friction coating adapted to prevent rotation of said support plate (4) when placed on a smooth surface, intended for improving circular holes in a coating, for example asphalt or concrete coating. (2). 9. The traction arm device according to claim 9, wherein
When the (75) swings to the substantially vertical position, the entire cutting device is moved to the trailer (7) so that the support plate (4) is located at its lowest position, for example, on the manhole cover (6).
4) A laterally projecting carrier pivot that hangs down from
The support plate (4) and the base (16) are freely lifted from the ground when the traction arm device (75) swings mainly to a horizontal transfer position. The equipment (2).