JP2009062683A - Device for cutting inner wall of manhole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for cutting the inner wall of a manhole which can be rotated via a pulley in such a manner that the upper edge of a manhole lid frame serves as a rail, and can cut a bolt for fastening the manhole, is buried in the manhole, by enabling the cutting action of a cutter to be exerted by exclusively employing a manual operation. <P>SOLUTION: The device for cutting the inner wall of the manhole comprises: pulley supporting mechanisms 7 in each of which the pulley sliding in such a manner that the upper peripheral edge M1 of the manhole lid frame serves as the rail is arranged; a base plate 2 with a handle in which the pulley supporting mechanisms are arranged in three locations at the outer periphery in such a manner as to freely advance and recede in a horizontal direction; an ascending and descending mechanism P which is provided between the pulley supporting mechanisms 7 and the base plate 2, and functions in a vertical direction; and a pushing adjusting mechanism which moves a driving source and a flat plate-shaped circular cutter 3, driven by the driving source and a gear mechanism and rotated on a horizontal plane on the base plate 2. The device for cutting the inner wall of the manhole can cut a bolt shaft B for supporting the manhole lid frame M, or the bolt shaft and a concrete wall by means of the circular cutter 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a manhole inner wall cutting device for cutting a bolt or a concrete wall (adjustment ring) fixed between a manhole frame and a concrete adjustment ring provided between a manhole vertical surface and an underground manhole. .

  In general, manholes are replaced and replaced together with road surface restoration due to factors such as road damage and manhole damage.

  In the case of manhole replacement and replacement, the outer peripheral road surface of the manhole is cut using a cylindrical cutter or an arc-shaped curved cutter, and then the road surface cut integrally with the manhole frame is lifted up as a lump. Therefore, it is necessary to cut the inner wall of the manhole when removing it.

  Conventionally, for example, a manhole work frame removal device has been known as one that cuts the inner wall of the manhole (see, for example, Patent Document 1 and Patent Document 2).

Furthermore, the technique which cut | disconnects the volt | bolt embed | buried in the manhole inner wall is known (for example, refer patent document 3).
Japanese Utility Model Publication No. 62-100804 JP-A-9-158114 JP 2007-9644 A

  The above-mentioned Patent Documents 1 and 2 are each provided with a cutter having a knife structure for cutting the inner wall of the manhole, but are limited to cutting a concrete, and it is impossible to cut a fastening bolt. is there.

  On the other hand, Patent Document 3 shows that a bolt can be cut. However, in Patent Document 3, the fixed substrate provided with the cutter mechanism is firmly fixed to the upper edge of the manhole cover frame, and the cutter mechanism is rotated around the rotation axis, so that it becomes extremely unstable, In addition, since the cutter mechanism is acting as an acting force on the inner wall of the manhole by the cylinder and the piston, there is a problem that machining control is difficult.

  The present invention has been made paying attention to the above points, and the upper edge of the manhole cover frame can be rotated as a rail by a pulley, and the cutter cutting action can be performed mainly by manual operation. An object of the present invention is to provide a manhole inner wall cutting device which can cut a bolt for fastening a seed and can also cut a concrete adjusting ring continuously.

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

  (1) A pulley support mechanism in which a pulley that slides as a rail is provided on the upper peripheral edge of the manhole cover frame, a substrate having a handle in which the pulley support mechanism is disposed in three places on the outer periphery so as to be movable back and forth in the horizontal direction, and the pulley support mechanism Elevating mechanism that works in the vertical direction provided between the substrate and the substrate, and a pressing source that moves the flat circular cutter that rotates on the horizontal plane, driven by the drive source and the gear mechanism. A manhole inner wall cutting device characterized in that it can cut a bolt shaft or a bolt shaft supporting a manhole cover frame and a concrete wall by the flat circular cutter.

  (2) The pulley support mechanism is characterized in that a set of two pulleys with respect to the pulley support plate is provided so as to be able to advance and retreat in the horizontal direction and to adjust the axial displacement of the pulley. ) Manhole inner wall cutting device as described.

  (3) The elevating mechanism is provided with an adjustment plate that can be moved back and forth in the horizontal direction at three locations on the outer periphery of the substrate, and the screw tube is erected and inserted into a cylindrical tube body having a screw with a knob that is screwed into the screw tube. The manhole inner wall cutting device according to (1), wherein the substrate can be moved up and down in a vertical direction by screwing the knob screw.

  (4) The pressure adjusting mechanism includes an operation handle provided on the board, a shaft rotated by the operation handle, a gear pulley that meshes with a gear provided on the shaft, a screw at the final end of the gear pulley, It consists of a screwed body that is screwed with the screw and moved back and forth on the screw, and a drive source that is driven and fixed to the screwed body. By rotating the handle shaft, the drive source is moved horizontally on the substrate. The manhole inner wall cutting device according to (1), wherein the flat circular cutter is cut toward the wall surface.

  According to the present invention, since the board is provided on the peripheral edge in three directions via the pulley support mechanism, the upper edge of the manhole cover frame is guided as a rail and can be rotated smoothly, and the horizontal direction The plate-shaped circular cutter can be easily set to the appropriate height with respect to the inner wall via the lifting mechanism, and the cutting process is handled with a manual adjustment handle by the manual operation handle. It has the effect of being able to.

  Also, the movement of the substrate in the manhole hole can be done manually by the operator, and the pulley support mechanism can be finely adjusted according to the size of the manhole diameter. It has the advantage that it can be done.

  An embodiment of the present invention will be described below with reference to the drawings.

  In the drawings, reference numeral 1 denotes an engine as a drive source, and a known starter, a fuel tank, and the like are omitted. Reference numeral 2 denotes a substrate provided with a flat circular cutter 3 that is driven from the output shaft of the drive source 1 via a desired gear mechanism (deceleration means), and rotates on a horizontal plane. Reference numeral 4 denotes an upper peripheral edge M1 of the manhole cover frame M. A sliding pulley with a hook is shown, and an operator can rotate the substrate 2 along the manhole cover frame M in the direction of an arrow by a handle 5 provided on the substrate 2. Reference numeral 7 denotes a pulley support mechanism that pivotally supports the pulley 4. In the figure, the pulley support mechanism 7 is constituted by a set of two pulleys 4 in three directions on the outer periphery of the substrate 2. 6 is a screw that adjusts the axial deviation from the center position of the manhole cover frame M as a rail according to the diameter of the manhole cover frame provided on one of the pulleys 4 in a set. 5 (a)), and a set of two pulleys 4 and 4 can always roll while maintaining proper displacement. That is, the axial displacement of the pulleys 4 and 4 can be finely adjusted by adjusting the distance between the tip 6a of the screw 6 and the abutment plate 2b of the board 2 that abuts the screw 6. Reference numeral 8 denotes a cylindrical tube standing upright at the base of the pulley support mechanism 7, and 9 denotes a screw tube standing upright on the adjustment plate 10. The screw tube 9 can be inserted into the cylindrical tube body 8 so as to be vertically movable and freely rotatable. The screw tube 9 is inserted into the cylindrical tube body 8 from the top, and the screw tube 9 is manually adjusted to adjust the screw tube 9 so that it can be moved up and down. Forming. Reference numeral 12 denotes a set screw screwed to the side surface of the cylindrical tube 8, which can be fixedly fixed to the outer periphery of the screw tube 9 screwed and inserted to firmly set the raising / lowering position of the screw 11 with knob. Reference numeral 13 denotes a screw hole of the screw tube 9, 14 denotes a screw groove of a screw 11 with a knob screwed into the screw hole 13, and 15 denotes a long hole 16 of a projecting portion 2 a projecting in three directions on the outer periphery of the substrate 2. The base can be fixed in the horizontal direction as shown in FIG. 4C according to the size of the manhole cover frame M, with a stopper that can be adjusted in length so that it can be moved forward and backward in the outer circumferential direction.

  By the way, when the diameter of the manhole cover frame M1 is different in size, the adjustment plate 10 is loosened with the stopper 15 in the radial direction of the pulley support mechanism 7 with respect to the center of the substrate 2, and along the elongated hole 16. Are moved forward and backward, matched with the diameter of the manhole cover frame M1, and then fastened. Further, one pulley 4 of the pulleys 4 and 4 provided in a set of two directions is set to the diameter of the manhole cover frame M1. By matching and rotating the pulley support mechanism 7 about the screw tube 9 using the screw 6 to adjust the axial deviation, the pulleys 4 and 4 in a set of three can secure an appropriate circular track. Is.

  On the other hand, in order to move the substrate 2 up and down with respect to the pulleys 4 and 4 sliding on the upper edge of the manhole cover frame M, the tubular tube body 8 of the pulley support mechanism 7 and the screw tube 9 inserted into the tubular tube body 8 are used. By moving up and down in the vertical direction, the desired height adjustment can be easily performed via the lifting mechanism P.

  Next, 17 is a support frame provided on the substrate 2, 18 is a manual operation handle supported by the support frame 17, 19 is a vertical rotation shaft, and 20 is provided at the lower end of the rotation shaft 19. A bevel gear, 21 is a bevel gear that meshes in the horizontal direction, and 22 is a group of gears combined with the bevel gear 21, which meshes with the ball screw 23 at the final stage and is arranged below the substrate 2 in the diameter direction of the substrate 2. . Reference numeral 24 denotes a screwed body that is screwed to the ball screw 23 and is fixed to the lower surface of the drive source 1. The screwed body 24 receives the rotating action of the operation handle 18 by the operator's ball screw 23 and causes the drive source 1 to move to the substrate 2. The pressure adjusting mechanism Q is configured to move in the horizontal direction by the desired sliding means and thereby move the flat circular cutter 3 toward the manhole wall surface H.

  In the figure, reference numeral 25 denotes a shaft cylinder of a rotating shaft (not shown) for rotationally driving the flat circular cutter 3, and 26 denotes a protective cover of the flat circular cutter 3, facing a water spout (not shown) It is possible to prevent scattering of crushed debris, dust and the like during cutting by the circular cutter 3. A slot 27 is formed in the substrate 2 so that the shaft cylinder 25 of the flat circular cutter 3 can pass through without any obstacles.

  Because of the above configuration, the diameter of the manhole cover frame M to be replaced is confirmed in advance, the mounting position of the pulley support mechanism 7 provided in the three directions on the outer periphery of the substrate 2 is set, and the pulleys 4, 4 Is correctly placed on the upper peripheral edge M1 of the manhole cover frame M, and the adjustment of the axial deviation of one pulley 4 of the pulleys 4 and 4 in a set of two is finely adjusted using the screw 6. Then, the whole is slidably placed on the manhole cover frame M.

  In addition, in order to define the cutting position of the manhole inner wall H before placement, in order to clarify the ascending / descending position of the screw tube 9 and the cylindrical tube body 8 of the pulley support mechanism 7 by the elevating mechanism P, a screw 11 with a knob is used. It is necessary to determine the screwing position and firmly fix it with the set screw 12.

  Then, at the position where the bolt shaft B for fastening the manhole cover frame is inserted, the flat circular cutter 3 is rotated at a necessary rotational speed for rotating the engine 1 and the operator manually moves the operation handle 18. The engine 1 and the shaft cylinder 25 are moved together with the flat circular cutter 3 to the insertion position of the bolt shaft B on the inner wall H of the manhole H as shown by an arrow in FIG. The bolt shaft B can be cut together with the surrounding concrete after a desired time.

  In general, since the bolt shaft B for tightening and screwing the manhole cover frame M with the concrete inner wall is embedded at equal intervals in the peripheral portion, the flat circular cutter 3 continues to the inner periphery of the manhole inner wall H. The operator rotates the grip 5 along the axis and cuts the pulleys 4 and 4 over the entire circumference of the inner wall H of the manhole by rolling and moving the pulleys 4 and 4 on the upper edge M1 of the manhole cover frame M. Can do.

  Since the bolt shaft B itself is made of metal and requires a strong cutting force for the cutting operation, a cutting process with the flat circular cutter 3 is necessary. However, the manhole inner wall H other than the bolt shaft B itself Since the hardness is not as strong as that of metal, the cutting process of the flat circular cutter 3 is limited to the partial cutting process of only the buried part of the bolt shaft B, and the waste of the manhole cover frame M and the concrete integrated with the concrete is stopped. The lumps can be easily removed by stripping on the lid with other necessary lifting equipment.

  The removal action of the manhole cover frame M after the cutting of the manhole inner wall H by the flat circular cutter 3 can be freely discarded by using various known publicly known tools.

  In particular, when cutting the outer periphery of the road surface of the manhole cover frame M, conventionally, there is a method of forming a cut surface into a cylindrical shape or a curved surface shape using a cylindrical cutter or a circular arc curved section cutter. Following this cutting method, the bolt shaft B is cut along the bolt axis B from the inner wall H of the manhole using the flat circular cutter 3 shown in this embodiment. , And can be removed as one block of concrete road surface including the manhole cover frame M.

  According to the present invention, for the size of the manhole cover frame M, the pulley support mechanism 7 can be advanced and retracted along the circumferential direction, that is, along the radial direction, along with the adjusting plate 10 at three locations on the outer periphery of the substrate 2. Moreover, since the flat circular cutter 3 can be set to a desired height by the lifting mechanism P, the cutting portion of the bolt shaft B can be cut more efficiently than the inner periphery of the manhole inner wall H.

  In particular, the pressurization of the flat circular cutter 3 on the manhole inner wall H can be freely adjusted by the operator's manual operation with the operation handle 18, so that the bolt shaft B and other concrete can be cut without difficulty.

The top view which shows one Example of the manhole inner wall cutting device which concerns on this invention In the side view of FIG. 1, the left side shows the case where the substrate is in the lower position through the center line, and the right side shows the case where the substrate is in the upper position. A gear mechanism of an operation handle and a drive source provided on the substrate is shown, and a pulley support mechanism is mounted on the upper peripheral edge of the manhole cover frame, and a flat circular cutter that is rotated by a rotational force obtained from the drive source is attached. Side sectional view showing the situation schematically It is explanatory sectional drawing which decomposes | disassembles and shows an raising / lowering mechanism and a pulley support mechanism, (a) is sectional drawing which shows the whole, (b) is sectional drawing of only a pulley mechanism, (c) is a protrusion of a board | substrate, and a screw Cross section showing relationship (A) is a partially enlarged plan view showing a substrate including a lifting mechanism and a pulley support mechanism, and (b) is a perspective view of a cylindrical tube body.

Explanation of symbols

1 Engine (drive source)
2 Substrate 2a Protruding portion 2b Contact plate 3 Flat circular cutter 4 Pulley 5 Grip 7 Pulley support mechanism 6 Screw 6a Screw tip 8 Tubular tube 9 Screw 10 Adjustment plate 11 Screw with screw 12 Locking screw 13 Screw hole 14 Screw groove 15 Stopper 16 Long hole 17 Support frame 18 Operation handle 19 Rotating shaft 20 Bevel gear 21 Bevel gear 22 Gear group 23 Ball screw 24 Screwed body 25 Shaft cylinder 26 Protective cover 27 Groove hole B Bolt shaft H Manhole inner wall M Manhole cover frame M1 Manhole cover frame upper edge P Lifting mechanism Q Pressing adjustment mechanism

Claims (4)

  A pulley support mechanism in which a pulley that slides as a rail is provided on the upper peripheral edge of the manhole cover frame, a substrate having a handle in which the pulley support mechanism is disposed at three positions on the outer periphery so as to be movable back and forth horizontally, the pulley support mechanism and the substrate Elevating mechanism that works in the vertical direction provided between, a driving source to the substrate, and a pressure adjusting mechanism that moves a flat circular cutter that is driven via the driving source and a gear mechanism and rotates on a horizontal plane, A manhole inner wall cutting device comprising: a flat circular cutter that can cut a bolt shaft or a bolt shaft that supports a manhole cover frame and a concrete wall.   2. The manhole according to claim 1, wherein the pulley support mechanism is provided with a set of two pulleys with respect to the pulley support plate so as to be movable forward and backward with respect to the horizontal direction and adjustable in the axial displacement of the pulley. Inner wall cutting device.   The elevating mechanism is provided with an adjustment plate that can be moved back and forth in the horizontal direction at three locations on the outer periphery of the substrate, and a screw tube is erected and inserted into a cylindrical tube body having a screw with a knob that is screwed into the screw tube. 2. The manhole inner wall cutting device according to claim 1, wherein the substrate can be moved up and down in the vertical direction by screwing the slave screw.   The pressure adjusting mechanism includes an operation handle provided on the board, a shaft manually rotated by the operation handle, a gear pulley that meshes with a gear provided on the shaft, a screw at a final end of the gear pulley, and a screw And a drive source that is moved forward and backward on the screw and a drive source that is driven and fixed to the screw, and by rotating the handle shaft, the drive source is moved horizontally on the substrate, 2. The manhole inner wall cutting device according to claim 1, wherein the flat circular cutter is cut toward the wall surface.

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