JP4819563B2 - Pipe cutting device and manhole cover and receiving frame replacement method using the device - Google Patents

Description

  The present invention relates to a pipe cutting device for cutting a concrete pipe from the inside when exchanging existing manhole covers and receiving frames, and a manhole cover and receiving frame replacement method using the apparatus.

  In recent years, with the increase in the size of vehicles and the increase in traffic, many troubles related to various manhole covers and receiving frames have occurred.

  Old iron lids and steel frames are not suitable for the current traffic situation because the mating surface is flat receiving structure and is not suitable for the current traffic situation. Good adhesion between the lid and the receiving frame occurs. There is an increasing need to replace the current iron-clad iron frame, which is difficult. At the same time, the diameter of the iron cover is in the direction of being changed to a smaller diameter. For example, in order to replace the 700 mm iron lid and the iron frame with 600 mm, the entire manhole lower casing must be replaced, and such construction requires a lot of labor, construction time, and construction costs. The current situation is not progressing as planned. Therefore, in order to speed up construction and reduce the cost, a part of the upper part of the manhole housing is cut horizontally and the adapter for the receiving frame for exchanging with a diameter smaller than the conventional diameter is joined to the housing cut by the inner diameter cutter. The ideal method is to set a small-diameter steel frame.

  Conventionally, generally, a cylindrical cut is made around the manhole at the construction site, and after removing the surrounding soil, the operator manually operates the cutter on the upper part of the exposed fume tube and cuts it into a ring. I was doing work to do.

  In addition, as a prior art, (1) a water pipe cutting machine for water manholes, “a support frame having a free caster that can roll along a paved road surface, and a position that can be adjusted along the support frame and locked at an arbitrary position. A horizontal caster that can roll along a vertical outer peripheral surface of an annular groove formed around the fume pipe by a circular cut, and a vertical position that is adjustable and rotatable on a column means to support the fume pipe. A horizontal cutter means having a cutter for cutting a ring and an adjusting means for adjusting the position of the cutter are set. A horizontal caster is set to roll along a vertical outer peripheral surface, and the support frame is cut on the road surface while being cut by the cutter. The invention of the water pipe manhole fume pipe cutting machine is disclosed, "The fume pipe is turned into a beautiful ring by turning it up." In example, see Patent Document 1.).

Further, (2) “a guide frame is rotatably supported between a pair of opposing frames protruding three support legs radially, and a cutting machine support frame is provided on the guide frame via guide means, The guide means is moved in the radial direction of the concrete pipe to make a cut to a required depth, the guide means is moved in the pipe axis direction to form a cut in the pipe axis direction, and the guide frame is further rotated. An invention of a concrete pipe inner surface cutting machine is disclosed (for example, patents), in which the inner surface of the concrete is peeled off by providing circumferential incisions and inserting the bar tip into each of the above incisions. Reference 2).
JP 2001-303601 A JP 2000-280232 A

  However, in the above-described conventional example, in the case of (1), since a large cylindrical excavating device is used, the road surface around the manhole is cut over a wide range. Therefore, the water pipe manhole fume pipe cutting machine according to the present invention. However, the machine body becomes larger, the construction range becomes wider than necessary, the construction period is long, the cost increases, and the workability remains a problem. In the case of (2), a cut is made in the required area of the inner surface of the concrete pipe buried in the ground, and the inner surface of the pipe is added to give flexibility to a part of the concrete pipe as a measure against ground subsidence or earthquake. A concrete pipe inner surface cutting machine for partial deletion, which is different from the gist of the present invention in a target configuration.

  The present invention has been made in view of the above situation, and when performing construction using a pipe cutting device such as a concrete pipe at the time of exchanging a manhole cover / receiving frame, it is not affected by the skill level of the worker. An object of the present invention is to provide a low-cost pipe cutting device capable of improving cutting accuracy, minimizing the construction range, shortening work time, saving labor, and improving work efficiency, and a manhole cover / frame receiving method using the device. And

  This invention can solve the said subject by providing the following structure.

(1) A pipe cutting device for cutting a concrete pipe from the inner surface side, having guide means for guiding along an opening surface and an inner peripheral surface of the concrete pipe, vertically downward and outward at the tip base portion of the guide means The wheel is configured to be able to roll in a lateral direction toward each other and grip the end portion formed of the opening surface and the inner peripheral surface of the concrete pipe, and the guide means passes through the center of the concrete pipe to the opening surface. are possible erection placed, Rutotomoni includes a cutter means for enabling cutting said guide means cooperating with the concrete pipe, said guide means comprises a main arm and connecting arm, one end of the main arm A first rolling contact portion formed by attaching a rollable wheel through each support block by simultaneously abutting and pressing the opening surface and the inner peripheral surface of the concrete pipe on the portion, The other side of the arm extension A long slot for guide is provided along the longitudinal axis, and the opening surface and inner circumference of the concrete pipe are provided at both ends of the Y-shaped connecting arm in a plan view that can be slidably positioned by engaging with the long guide hole. The concrete pipe has a second and a third rolling contact portion, each of which has a second and a third rolling contact portion formed by attaching and rolling a wheel that can freely roll by pressing and pressing the two surfaces simultaneously. A tube cutting device characterized in that it is configured to be able to rotate and move along the opening surface of the tube and to be adapted to concrete tubes having different diameters as needed .

  (2) The preceding section (1), wherein the guide means is composed of a plurality of sets of rollable wheels that form a pair that simultaneously abuts and presses two surfaces of the opening surface and the inner peripheral surface of the concrete pipe. The tube cutting device according to claim 1).

( 3 ) The upper and lower positions of the female threaded portion that engages with the abutment rod that forms the male threaded portion perpendicular to the axle of the wheel that constitutes the guide means and contacts and presses against the opening surface of the concrete pipe are vertically positioned on the main arm and the connecting arm. It is fixed via a bracket having a guide part, the tip of the male threaded part of the butting rod is provided in contact with the upper surface of the support block on which the wheel is suspended, and the male threaded part can be screwed and rotated to be vertically positioned. The tube cutting device according to the above item (1 ), wherein a cutting position adjusting means is formed and the cutter means is moved up and down via the main arm and the connecting arm so that the positioning of the cutting surface can be adjusted.

( 4 ) The cutter means comprises a disk-shaped rotary blade, a drive means for rotationally driving the disk-shaped rotary blade, and a gripping portion with an ON / OFF switch for controlling the drive of the drive means, and the main arm A drive means for rotational drive that pivotally supports the cutter blade is attached to one side end of the blade through a swing arm so that it can be switched between cutting and non-cutting, and it is possible to cut the concrete pipe round by operating the gripping part. The tube cutting device according to item (1), characterized in that:

( 5 ) A manhole cover / receiving frame replacement method that involves cutting operation of a concrete pipe that forms a manhole shaft using the pipe cutting device described in (1) above, and (1) a manhole cover / receiving frame to be constructed upon the periphery of deleting annularly circular shape in plan view, the step of Ru provided a cut with a road cutter for cutting arc-shaped cross section, (2) an arc-shaped cross section hollow arm-shaped residual soil after incision around the manhole cover-receiving frame And the step of removing the existing manhole cover / frame, (3) the step of setting the pipe cutting device according to the present invention on the upper part of the concrete pipe forming the exposed shaft, and (4) the depth of the cutting dimension based on the road surface measured at a position, step of setting by adjusting the cutting position, (5) cut by contact pressing the cutter blade to set the cutting position of the concrete pipe, after incision predetermined depth, the switching Step to complete the round slices cut by moving while rotating the cutting blade by keeping write depth cooperates with the wheel of the guide means along a predetermined cutting plane, the cut slice portion (6) The concrete pipe a step of removal, (7) a step of step, the mounting a predetermined adapter receiving frame to the surface coated with the then adhesive (8) for applying an adhesive to the tube opening surface after cleavage of the concrete pipe, (9) the predetermined the step of fastening fixing a receiving frame for a given lid fastening member attached to the adapter for a given receiving frame so as to maintain the parallel with the road surface by placing a receiving frame for a predetermined lid on top of the adapter receiving frame, ( 10) Install the inner mold so as to press the inner mold so as to close the gap between the predetermined receiving frame for the lid and the predetermined receiving frame adapter from the inside, and fix it with the inner mold fixing tool so that it does not protrude inside. the step of supplying the mortar, (11 ) A step of filling early-strength mortar into a gap space around a predetermined manhole cover receiving frame to a position below a road surface by a predetermined dimension; (12) after the early-strength mortar is cured after a predetermined time , step excluding takes fixture and inner mold, (1 3) a predetermined closing Gilles step manhole fitted a predetermined lid receiving frame, (1 4) and then a predetermined manhole cover suitably selected surface layer material - receiving frame road surface and the lid surface around and filled so as to be flush, manhole cover with a tube cutting device which comprises a step step to complete the construction finished with raised means specification surface, that・ Replacement frame replacement method.

  According to the present invention, when performing construction using a pipe cutting device such as a concrete pipe at the time of exchanging the manhole cover and receiving frame, the pipe cutting accuracy is improved regardless of the skill level of the worker, and the construction range is minimized. Thus, it is possible to provide a low-cost pipe cutting device that can shorten the work time and save labor and improve the work efficiency, and a manhole cover / receiving frame replacement method using the device.

  DESCRIPTION OF EMBODIMENTS Embodiments of a tube cutting device according to the present invention and a manhole cover / receiving frame replacement method using the device will be described below with reference to the drawings.

  FIG. 1 is an explanatory view showing a main part configuration of a pipe cutting device according to the present invention, (a) is a plan view, (b) is a side view, and (c) is a side view showing a main part configuration of a cutting position adjusting means. FIG. 2 is a perspective view showing the overall configuration, and FIG. 3 is a flowchart of a manhole cover / receiving frame replacement method using the tube cutting device according to the present invention.

  Embodiments of a tube cutting apparatus according to the present invention and a manhole cover / receiving frame replacement method using the apparatus will be described below with reference to the drawings.

  A pipe cutting device for cutting the concrete pipe CP from the inner surface side, having guide means G for guiding along the opening surface U of the concrete pipe CP, vertically downward at the tip base of the guide means G and laterally facing outward The wheels 2 and 2 that are freely rollable are arranged so as to grip the end portion of the opening surface U and the inner peripheral surface Wi of the concrete pipe CP, and the guide means G passes through the center of the concrete pipe CP. It is characterized by comprising cutter means Cu that can be installed on the opening surface U and that can cut the concrete pipe CP in cooperation with the guide means G.

  The guide means G is composed of a plurality of sets of at least three or more of the wheels 2 and 2 that form a pair that simultaneously abuts and presses two surfaces of the opening surface U and the inner peripheral surface Wi of the concrete pipe CP.

Further, the guide means G includes a support block 3 and a wheel which are capable of rolling the wheel 2 by simultaneously abutting and pressing the opening surface U of the concrete pipe CP and the inner peripheral surface Wi on one side end of the main arm 1. 1 has a first rolling contact portion Z1 attached via a support block 30 that supports 2 laterally, and a guide slot 4 is provided on the other side of the main arm 1 along the longitudinal axis. Provided to engage the guide long hole 4 and contact the two surfaces of the opening U of the concrete pipe CP and the inner peripheral surface Wi simultaneously on both ends of the Y-shaped connecting arm 5 in a plan view. It has second and third rolling contact portions Z2 and Z3 formed by pressing and rolling wheels 2 and 2 attached via support blocks 3 and 30, and the concrete pipe is supported in three points. A concrete pipe CP1 having a different diameter, which is freely movable along the opening surface U of There as at any time adaptable configuration to P2.

  A female threaded portion 7 that is screwed into an abutment rod 6 that forms a male threaded portion 6b perpendicular to the axle of the wheel 2 that constitutes the guiding means G and abuts against and presses against the opening surface U of the concrete pipe CP. The connecting arm 5 is fixed via a bracket 8 having a vertical positioning guide portion composed of a long hole 8b and a fastening bolt 3a engaged therewith, and a wheel 2 is suspended from the front end portion of the male screw portion of the abutment rod 6. A cutting position adjusting means T which is provided in contact with the upper surface of the support block 3 and can be positioned vertically by screwing and rotating the male threaded portion 6b using the knob 6a. The cutter is provided via the main arm 1 and the connecting arm 5. The means Cu is moved up and down so that the positioning of the cut surface can be adjusted.

As shown in FIG. 1 (c), the cutting position adjusting means T is screwed into a female screw portion 7 in which a butting bar 6 engraved with a male screw portion 6 b is fixed to a bracket 8 by welding. Then, in order to adjust the height of the bracket 8 abutted by the butting bar 6 up and down, the knob 6a can be rotated in either the left or right direction to move the male screw portion 6b up or down. In this case, it is necessary to loosen the fastening bolt 3a inserted through the long hole 8b of the bracket 8.

  Of course, the cutting position adjusting means T, after adjusting the same height in all of the main arm 1 and the connecting arm 5, is fastened firmly by fastening the connecting bolt 3a.

The cutter means Cu includes a cutter blade (disk-shaped rotary blade) 10, a drive means 9 that rotationally drives the disk-shaped rotary blade 10, and a grip portion 11 with an ON / OFF switch that controls the drive of the drive means 9. The fulcrum 12a of the swing arm 12 of the cutter blade 10 is provided at one end portion of the main arm 1 so as to function as a rotating shaft, and the drive means 9 for driving the cutter blade 10 can be switched between cutting and non-cutting. It is characterized in that the concrete pipe CP can be cut and cut by attaching and operating the grip portion 11.

  In addition, it is preferable that the drive unit 9 includes a reduction gear in consideration of the rotational torque.

  Next, the manhole cover / receiving frame replacement method using the tube cutting device according to the present invention will be described with reference to a flowchart.

A manhole cover / receiving frame replacement method that involves a cutting operation of a concrete pipe that forms a manhole shaft using the pipe cutting device of the present invention. viewing circle, step Ru provided a cut with a road cutter for cutting the arc-shaped cross section (S1), to remove the circular-arc cross section hollow arm-shaped surplus soil and existing manhole cover-receiving frame after the cuts around the manhole cover-receiving frame Step (S2), cleaning the spherical cut surface after removing the residual soil, and then setting the pipe cutting device according to the present invention on the top of the concrete pipe forming the exposed shaft (S3), cutting dimensions road measured at depth position relative to the step of setting by adjusting the cutting position (S4), cut by contact pressing the cutter blade to set the cutting position of the concrete pipe After incision predetermined depth, the notch to maintain the depth by using the wheel of the guide means moves while rotating the cutter blade along a predetermined cutting plane Ru to complete slice cutting step (S5 (In the case of a relatively large concrete pipe, when the cutter blade is pressed in the middle of cutting, a wedge is appropriately inserted to prevent the cutter blade from being pressed.) a step of removing the (S6), the step of applying an adhesive material to the tube opening surface after cutting of the concrete pipe (S7), then the surface coated with adhesive that mounting the adapter predetermined receiving frame step (S8), the step of fastening fixing a receiving frame for a given lid fastening member attached to the adapter for a given receiving frame so as to maintain the parallel with the road surface by placing a receiving frame for a given cover over the predetermined adapter receiving frame (S9), Attaching the inner mold (for example, foamed resin material such as urethane material) so that the gap between the fixed lid receiving frame and the predetermined receiving frame adapter is closed from the inside, and the inner mold fixing tool to in fixed steps of supplying a mortar so as not to protrude inward (S10), filled with a predetermined a predetermined size (e.g. 30 mm) from the road surface around the interstitial spaces manhole cover for receiving frame lowered early strength mortar to a position step (S11), after early strength mortar has hardened predetermined time has passed, except rather step (S12) takes inner mold fixture and inner mold, fitting a predetermined lid to a predetermined receiving frame combined and manhole closed Ru step (S13), - then suitably selected road surface and the lid surface of the surface layer material around a predetermined manhole cover-receiving frame is filled so as to be flush, construction finished surface finishing means鏝等To complete the process (S1 4), a manhole cover / receiving frame replacement method using a tube cutting device including the process of.

  In the pipe cutting device of the present invention, the driving means 9 and the cutter blade 10 are shifted from the cutting operation to the non-cutting operation in consideration of labor saving and rationalization when switching between cutting and non-cutting via the swing arm 12. A coil spring (not shown) is urged in a returning direction so that it can be easily returned, and a stopper (not shown) is provided to prevent it from returning too much so as to stop at a predetermined position.

Regarding other codes , 14 is a power cord, and H1 and H2 are handles of the tube cutting device of the present invention, which can be moved with the handle.

  In addition, the cutter blade 10 includes a cooling nozzle for preventing overheating, and includes a water supply means such as a hose so that the cooling water can be freely supplied even during the cutting operation.

Explanatory drawing which shows the principal part structure of the pipe cutting device which concerns on this invention, (a) Top view, (b) Side view, (c) Side view which shows the principal part structure of a cutting position adjustment means The perspective view which shows the whole structure Flow chart of manhole cover / frame receiving method using the tube cutting device according to the present invention

DESCRIPTION OF SYMBOLS 1 Main arm 2 Wheel 3, 30 Support block 4 Slot for guide 5 Connection arm 6 Butting rod 7 Female thread part (nut)
8 Bracket 9 Driving means 10 Cutter blade (disk-shaped rotary blade)
11 Grasping part 12 Swing arm 13 Power cord CP Concrete pipe Cu Cutter means G Guide means T Position adjusting means U Opening surface Wi Inner circumferential surface H1, H2 Handle Z1 First rolling contact portion Z2 Second rolling contact Part Z3 Third rolling contact part

Claims (5)

A pipe cutting device for cutting a concrete pipe from the inner surface side, having guide means for guiding along an opening surface and an inner peripheral surface of the concrete pipe, vertically downward and laterally outward at a tip base portion of the guide means Each wheel is provided with a rollable wheel so as to grip the end portion of the opening surface and the inner peripheral surface of the concrete pipe, and the guide means is installed on the opening surface through the center of the concrete pipe. are possible, Rutotomoni includes a cutter means for enabling cutting said guide means cooperating with the concrete pipe, said guide means comprises a main arm and connecting arm, the concrete at one end of the main arm A first rolling contact portion formed by attaching a rolling wheel by simultaneously pressing and pressing the two surfaces of the opening surface and the inner peripheral surface of the tube via each support block, and extending the main arm Guy on the other side An opening and an inner peripheral surface of a concrete pipe are provided at both ends of a Y-shaped connecting arm in plan view, which is provided with a long hole for use along the longitudinal axis and engages with the guide long hole to allow sliding positioning. The second and third rolling contact portions are formed by attaching a rolling wheel by simultaneously pressing and pressing the two surfaces through the respective support blocks. A tube cutting device characterized in that it is configured to be able to rotate and move along an opening surface and to be adapted to concrete tubes having different diameters as needed .   The said guide means is comprised by several sets of the rollable wheel used as the pair which contact | abuts and presses two surfaces of the opening surface of an concrete pipe, and an internal peripheral surface simultaneously. Pipe cutting device. The upper and lower positioning guide portions are formed on the main arm and the connecting arm with the female screw portion screwed into the butting rod forming the male screw portion perpendicular to the axle of the wheel constituting the guiding means and contacting and pressing the opening surface of the concrete pipe. A cutting position that is fixed via a bracket having a male screw part of the abutment rod in contact with the upper surface of a support block that is suspended from a wheel, and that the male screw part can be screwed and rotated to position vertically. 2. The tube cutting device according to claim 1, wherein an adjusting means is formed and the cutter means is moved up and down via the main arm and the connecting arm so that the positioning of the cutting surface can be adjusted.   The cutter means comprises a disk-shaped rotary blade, a drive means for rotationally driving the disk-shaped rotary blade, and a gripping part with an ON / OFF switch for controlling the drive of the drive means, and one side of the main arm A drive means for rotational driving that pivotally supports the cutter blade at the end is attached via a swing arm so as to be able to switch between cutting and non-cutting, and it is possible to cut the concrete pipe by cutting the concrete pipe by operating the gripping part. The tube cutting device according to claim 1. A manhole cover / receiving frame replacement method involving a cutting operation of a concrete pipe that forms a manhole shaft using the pipe cutting device according to claim 1, and (1) annulus around the manhole cover / receiving frame to be constructed upon deleting a plan view a circular, step Ru provided a cut with a road cutter for cutting arc-shaped cross section, (2) an arc-shaped cross section hollow arm-shaped surplus soil and existing manhole after incision around the manhole cover-receiving frame The step of removing the lid / frame, (3) the step of setting the pipe cutting device according to the present invention on the upper part of the concrete pipe forming the exposed shaft, and (4) measuring the cutting dimension at the depth position based on the road surface. a step of setting by adjusting the cutting position, (5) cut by contact pressing the cutter blade in the cutting position of the set concrete pipe, after incision predetermined depth, the depth of cut Step to complete the round slices cut by moving while rotating the cutter blade maintains in cooperation with the wheel of the guide means along a predetermined cutting plane, (6) a step of removing the cut slice portion of the concrete pipe, (7) applying an adhesive to the tube opening surface after cleavage of the concrete pipe, (8) and then the step of mounting an adapter for a given receiving frame to a surface coated with an adhesive, (9) adapter for the predetermined receiving frame the step of fastening fixing a receiving frame for a given lid fastening member attached to the adapter for a given receiving frame so as to maintain the parallel with the road surface by placing a receiving frame for a predetermined lid on top of, (10) a predetermined supplying mortar the gap so as not to protrude fixed with inner mold fixture mounted so pressed against inner mold so as to close from the inside to the inside between the receiving frame and the predetermined receiving frame adapter for the lid step, (11) a predetermined Filling the early strength mortar in the gap space around the receiving frame for Nhoru lid to a position lowered a predetermined distance from the road surface, (12) after the early strength mortar has hardened predetermined time has passed, and the inner mold fixture step excluding takes inner mold, (1 3) a predetermined closing Gilles step manhole fitted a predetermined lid receiving frame, (1 4) and then appropriately selected predetermined manhole cover-receiving frame surrounding the surface layer material the road surface and the lid surface is filled so as to be flush, to complete the construction finished with raised means specifications surface processes, the manhole cover-receiving frame using a tube cutting device which comprises the steps of Replacement method.