JP2007009644A - Fixing device of manhole inner wall cutting machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safe fixing device of a manhole inner wall cutting machine securely fixable to the specified position of a manhole and preventing it from lowering or dropping even if the fixed state thereof is loosened. <P>SOLUTION: This fixing device is applicable to the manhole inner wall cutting machine for supporting a blade 13 on a support member detachably fixed to the manhole h movably in the radial and circumferential directions of the manhole h and cutting the inner wall ha of the manhole h by the blade 13. The support member comprises a fixed base plate 1 placed on the manhole h and pressing blocks 2 screwed with fixing bolts 10 radially arranged on the fixed base plate 1 and pressed against the inner wall ha of the manhole h by the operation of the fixing bolts 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  According to the present invention, for example, when a road is repaired, it is necessary to remove a manhole conduit portion protruding from the road, but the manhole inner wall cutting machine used for cutting the conduit portion with an appropriate length (depth) is used. It relates to a fixing device.

  A manhole inner wall cutting machine that cuts the inner wall of the manhole by supporting a blade movably in the radial direction and circumferential direction of the manhole on a support member that is detachably fixed to the manhole is described as an example. Although it is well known, it is general that the support member is composed of a radially arranged cylinder, the rod end of the cylinder is pressed against and fixed to the inner wall of the manhole, and the subsequent cutting operation is performed. (For example, patent document 1).

JP-A-5-202528

  In the above conventional example, the cylinder is operated with the cutting machine suspended in a suspended state and is fixed in a stretched state using the inner wall of the manhole. There is a risk of gradual descent or drop due to strength.

  The present invention has been devised to provide an apparatus capable of reliably fixing to a manhole by paying attention to the disadvantages of such a conventional example.

  In a manhole inner wall cutting machine in which a blade is supported by a support member that is detachably fixed to a manhole so as to be movable in a radial direction and a circumferential direction of the manhole, and the inner wall of the manhole is cut by the blade. A fixed board placed on the manhole, and a pressure contact piece screwed into a fixed bolt arranged in a radial position on the fixed board, and pressed against the inner wall by operation of the fixed bolt. is there.

  According to the present invention, the fixing bolt is operated and the pressure contact piece is operated and fixed in a state where the fixed substrate is placed on the manhole, so that the fixing operation is performed reliably and at a desired position. Even if the fixed state is loosened, the manhole is not lowered or dropped, and thus a safe device can be provided.

  The drawings show an embodiment of a fixing device for a manhole inner wall cutting machine according to the present invention, FIG. 1 is a side view, FIG. 2 is a plan view, FIG. 3 is a side view of the main part of the present invention, and FIG. FIG. 5 and FIG. 5 are sectional views taken along the line aa ′ in FIG.

  In the figure, reference numeral 1 denotes a fixed substrate. The fixed substrate 1 protrudes in three directions in the radial direction of the manhole h from a central portion in which a guide tube 3 communicating between the upper and lower surfaces is vertically arranged, and is arranged at equal intervals. The arm 1a, 1a, 1a is composed of a radial body, and the pressure contact piece 2 is assembled to the tip of each arm 1a, and the pressure contact piece 2 is directly or indirectly attached to the inner wall ha of the manhole h. It is press-contacted and detachably fixed to the manhole h, and the reaction force accompanying the cutting of the inner wall ha by the blade 13 is received by the inner wall ha.

  A guide window 4, a support piece 5, and a pair of guide-use locking pieces 6, 6 are provided at the tip of each arm 1 a of the fixed substrate 1, and the pressure contact piece 2 is provided by these 4, 5, 6. Is fixed to the manhole h of the fixed substrate 1 so as to be assembled to the arm portion 1a (fixed substrate 1).

  The guide window 4 is elongated along the longitudinal direction of the arm portion 1a (the radial direction of the manhole, hereinafter simply referred to as the radial direction), and the proximal end side of the guide window 4 (the base side of the arm portion 1a). ) With the base end portion of the window 4 directly and partially interposed so that the locking pieces 6 and 6 are opposed to each other, and the locking piece 6 is located on the opposite side of the mounting piece 6a. A locking piece 6b is projected from the upper end of the arm, and fixed to the arm 1a with a fixing screw 7 at the mounting piece 6a, and as described above, is erected relative to the arm 1a. It is.

  The support piece 5 is provided with a through-hole 8 erected at the center of the tip of the arm portion 1 a on the extension of the guide window 4 so that the axis is along the center line of the guide length window 4.

  The press contact piece 2 is configured by projecting a press contact portion 2b below a main body portion 2a having a screw hole 9 provided horizontally, and the lower portion of the press contact portion 2b is connected to the guide window 4 from the upper surface of the arm portion 1a. A screw hole provided in the main part 2a through the through-hole 8 provided in the support piece 5 with the tip of the fixing bolt 10 being combined so as to protrude to the lower surface side and placed on the main part 2a on the arm part 1a. 9, while a receiving groove 11 serving also as a guide is formed by opening one end of the base portion side of the arm portion 1 a on the side surface of the main body portion 2 a so as to face the locking portion of the locking piece 6. It is arranged at a position coinciding with (engaging with) the piece 6.

  Note that a plurality (three in the embodiment) of press contact screws 12 are screwed through from the base side of the arm portion 1a in the press contact portion 2b of the press contact piece 2. This is because the tip of the press contact screw 12 has a manhole. It is possible to increase the fixing strength of the fixed substrate 1 by making point contact with the inner wall ha of h, and even if the inner wall ha is uneven, the unevenness is absorbed and contact with the inner wall ha is ensured. However, it is a matter of course that there is no problem even if the pressure contact portion 2b is brought into direct contact with the inner wall ha.

  By using a plurality of the press contact screws 12, it is possible to more reliably absorb the unevenness of the inner wall ha by adjusting the protruding amount of each screw 12 from the press contact portion 2b of the press contact piece 2.

  Thus, by operating the fixing bolt 10 disposed on each arm 1a at the head 10a, the press contact piece 2 moves along the guide window 4 or the receiving groove 11, and the press contact portion 2b of the press contact piece 2 is moved. Alternatively, the pressure contact screw 12 is in pressure contact with the inner wall ha, and the fixed substrate 1 is fixed to the inner wall ha via the pressure contact piece 2 in at least three radial directions, so that it is securely fixed to the manhole h, and the detachment operation is also performed with the fixing bolt 10. This can be done easily by loosening the screw.

  In the fixed substrate 1, a support column 14 made of a screw is provided upright at an intermediate portion in the longitudinal direction (the radial direction) of each arm 1a, and a support nut 15 is screwed to the support column 14, and the support nut. 15, the device substrate 16 is supported between the support columns 14, and the device substrate 16 projects in three directions from the central portion where the support tube 18 is provided in the radial direction of the manhole h, and is arranged at equal intervals. The fixed substrate 1 is formed of a radial body having arm portions 16a, 16a, 16a shorter than the arm portion 1a, and penetrates the support column 14 corresponding to a through hole (not shown) provided at the distal end portion of the arm portion 16a. As described above, it is combined with the support column 14 so as to be supported by the support nut 15.

  A clamping nut 17 screwed to the column 14 is disposed on the device substrate 16, and the device substrate 16 is clamped (clamped) by the receiving nut 15 and the clamping nut 17, and is fixed at an appropriate position in the vertical direction of the column 14. Is done. That is, the apparatus substrate 16 changes its vertical position depending on the movement position of the support nut 15 along the column 14, and the displacement state position is maintained by tightening the apparatus substrate 16 with the support nut 15 and the tightening nut 17.

  The support cylinder 18 provided in the central portion of the apparatus substrate 16 and the guide cylinder 3 provided coaxially with the support cylinder 18 and provided in the central portion of the fixed substrate 1 are combined with a rotating shaft 19 passing through. The moving shaft 19 is provided with a latching material 20 at the upper end protruding from the support cylinder 18, the latching material 20 is received and supported by the support cylinder 18, and a blade frame 21 is provided at the lower end side protruding from the guide cylinder 3. The blades 13 are assembled to the blades.

  The hooking material 20 that is hooked on the support cylinder 18 and suspends the rotary shaft 19 and the blade frame 21 provided at the lower end of the hook is standing on the one arm portion 16a of the device substrate 16 so as to be freely rotatable. The lever shaft 22 is connected to the lever shaft 22 via a rotation transmission device (in the embodiment, composed of a gear and a chain) 23, and is rotated by an operation of an operation lever (not shown) that can be assembled to the lever shaft 22. Thus, the ratchet gear 24a installed on the latching member 20, the latching claw 24b and the coil spring are engaged with the latching member 20. Reverse rotation is regulated by a ratchet device (reverse rotation preventing device) 24 comprising 24c.

  The blade frame 21 fixed to the lower end of the rotary shaft 19 is provided with a cylinder 25, by which the blade 13 rotated by a drive motor 26 can freely advance and retreat with respect to the radial direction of the manhole h, that is, the inner wall ha. It is assembled to the blade frame 21 so as to move to.

  Thus, the manhole inner wall cutting machine A is placed on the manhole h on the fixed substrate 1 so that the lower side (blade 13 and the like) of the rotating shaft 19 is engaged with the manhole h in the manhole h. Then, by operating the fixing screw 7 and moving the pressure contact piece 2, as described above, the cutting machine A is fixed, and then the cylinder 25 is operated to move the blade 13 toward the inner wall ha to cut the inner wall of the manhole. Then, when the lever 13 is rotated by operating a lever detachably attached to the lever shaft 22 while maintaining the position of the blade 13 at the time of cutting, the lever shaft 22 is connected via the rotation transmission device 23. Since the rotation shaft 19 is connected to the rotation shaft 19, the rotation shaft 19 is rotated by the lever operation manually, and the blade frame 21 integrated with the rotation shaft 19 is rotated about the shaft 19 accordingly. , The blur The blade 13 mounted on the frame 21 moves along the inner wall ha of the manhole h, cuts the inner wall while absorbing some resistance by the ratchet device, stops the motor and the like after the cutting work, and fixes the fixing screw 7 Then, the cutting machine A is removed from the manhole h, and the cutting operation is completed.

Side view. Plan view. The side view of this invention principal part. FIG. 4 is a plan view of FIG. 3. FIG. 4 is a cross-sectional view taken along the line aa ′ in FIG. 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixed substrate 2 Pressure welding piece 10 Fixing bolt 13 Blade h Manhole ha Inner wall

Claims (1)

In a manhole inner wall cutting machine in which a blade is supported by a support member that is detachably fixed to a manhole so as to be movable in a radial direction and a circumferential direction of the manhole, and the inner wall of the manhole is cut by the blade. A manhole comprising: a fixed substrate placed on the manhole; and a pressure contact piece screwed into a fixing bolt arranged radially on the fixed substrate, and pressed against the inner wall by operation of the fixing bolt. Fixing device for inner wall cutting machine.

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