JP2010058272A - Manhole inner wall cutter and tool for manhole inner wall cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a versatile manhole inner wall cutter capable of accurately and stably holding a set position of a blade during a process of cutting an concrete inner wall of a manhole, capable of accurately cutting a preset prescribed portion of the concrete inner wall of the manhole, and capable of prolonging a usable period of the blade. <P>SOLUTION: The manhole inner wall cutter 1 is constituted of: a support member 2 removably fixed onto an approximately circular manhole lid receiving part peripheral edge part 3; and a blade holding control part 80 suspended from the support member 2 toward the inside 5 of the manhole 4, and comprising an inner casing 32 for slidably holding the circular rotary blade 6 and an outer casing 26 for covering the inner casing 32. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a manhole inner wall cutting machine, and more particularly to a versatile manhole inner wall cutting machine that can easily cope with manholes having different diameters or manhole inner walls made of concrete having different diameters.

  That is, 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, and the manhole inner wall cutting used to cut the conduit portion with an appropriate length (depth) is required. In general, there are manholes for sewerage, manholes for electric power, and manholes for NTT. The diameters and heights of the manhole cover receiving parts are different from each other. Furthermore, the diameter of the concrete cylindrical part formed at the lower part of the manhole cover receiving part is also in the range of 600 mm to 900 mm, for example. In some cases, the diameter of the cylindrical portion made of concrete changes in the middle.

  Therefore, conventionally, the manhole inner wall cutting machine designed for each manhole is prepared in advance, and an appropriate manhole inner wall cutting machine is selected and used according to each manhole. The current situation is.

  Therefore, conventionally, since it is necessary to prepare a plurality of types of manhole inner wall cutting machines, there is a problem that the cost is high and the work efficiency is also reduced.

  On the other hand, a manhole inner wall cutting machine that cuts the inner wall of the manhole by supporting a blade movably in a radial direction and a circumferential direction of the manhole on a support member that is detachably fixed to the manhole, for example, It is known as seen in Kaihei 5-202528 (Patent Document 1), Japanese Patent Application Laid-Open No. 2007-9644 (Patent Document 2) or Japanese Patent Application Laid-Open No. 2007-290280 (Patent Document 3).

  However, in Patent Document 1, since the support member is fixed to the cylindrical concrete inner wall in the manhole, the setting operation of the manhole inner wall cutting machine is extremely complicated and the operation efficiency is low. There is a problem, and in Patent Document 2, the support member is configured to be detachably engaged with the upper edge of the peripheral wall of the manhole cover receiving portion of the manhole. Although the blade holding unit is mounted on one sliding member, the blade holding unit is mounted on the inner wall of the manhole by an appropriate cylinder, although the blade holding unit is mounted on one sliding member. The position of the blade with respect to the inner wall of the manhole shifts due to vibration or impact, or the cut surface. There are problems such as deformation, also it is also adversely affect the lifetime of the blade.

On the other hand, although Patent Document 3 is versatile in that it can be used for various manholes, the support structure of the blade is the same as that of Patent Document 2, and therefore the concrete inner wall surface of the manhole. It was impossible to stably maintain the blade with respect to the cutting site and to accurately cut the set site.
JP-A-5-202528 JP 2007-9644 A JP 2007-290280 A

  The object of the present invention is to solve the above-mentioned problems in the prior art, have versatility, and accurately and stably set the position of the blade during the process of cutting the concrete inner wall surface of the manhole. A manhole inner wall cutting machine capable of accurately cutting a predetermined portion of the concrete inner wall surface of the manhole set in advance and extending the usable period of the blade. It is.

  In order to achieve the above object, the manhole inner wall cutting machine according to the present invention employs a basic technical configuration as shown below.

  That is, a first aspect of the manhole inner wall cutting machine according to the present invention is a manhole inner wall cutting machine, and the manhole inner wall cutting machine is detachably fixed to the peripheral wall of the substantially circular manhole cover receiving portion. And a blade holding control member that holds the circular rotating blade that is suspended from the support member so as to move up and down from the support member to the inside of the manhole. The blade holding control unit connects at least two vertical wall portions that are erected in parallel with each other at a predetermined interval and upper edges of the two vertical wall portions, and the support member. And an upper casing plate part that is bonded and fixed to the outer casing part, and is slidably housed inside the outer casing part, and at least the inner wall part of the manhole A lower holding substrate in which a blade holding member that rotatably holds a blade portion for cutting and a hydraulic motor that rotationally drives the blade portion are arranged, and upward from at least both side edge portions of the lower holding substrate, The internal housing portion is composed of an auxiliary wall portion standing upright substantially in parallel with the vertical wall portion of the external housing portion, and the external housing portion includes the internal housing portion. It is a manhole inner wall cutting machine provided with an inner housing part sliding control means for sliding the part with the outer housing part, and as a second aspect of the manhole inner wall cutting machine according to the present invention, A support member that is detachably fixed to the peripheral wall of the substantially circular manhole cover receiving portion, and a blade holding member that holds the circular rotating blade suspended from the support member toward the inside of the manhole. The support member is at least three substrate arm portions radially extending from the main body portion in the vicinity of the manhole center portion, and the tip of each substrate arm portion or the vicinity thereof has the A fixing part including an engaging fixing part engagement that includes a pressure contact member that can be detachably engaged with and fixed to the peripheral wall of the manhole cover receiving part and is slidable in the longitudinal axis direction of each of the substrate arm parts. Is engaged with each column member extending upward from each substrate arm unit on the substrate, and in the vertical direction along the axial direction of each column member. A first opening and a second opening formed concentrically with the central axis of the manhole on each of the board and the auxiliary board. And are formed, In addition, one hollow tubular tube portion is penetrated through the first and second openings at the same time, and the hollow tubular tube portion corresponds to the second opening portion of the auxiliary substrate. The hollow tubular cylinder is held rotatably, but in the first opening of the substrate, the hollow tubular cylinder is held rotatably and slidable in the vertical direction. The upper end portion of the hollow tubular tube portion, which is disposed on the upper surface of the auxiliary substrate, is configured to rotate freely by engaging with the appropriate hollow tubular tube portion rotating means provided on the auxiliary substrate. In addition, the lower end portion of the hollow tubular cylindrical portion disposed inside the manhole is joined and fixed to a part of a casing portion of a blade holding control unit that holds and controls the blade portion. The holding control unit sets at least two predetermined intervals. The upper wall of the two vertical wall portions and the upper connecting plate portion that is joined and fixed to a part of the support member. An external housing portion that is slidably housed inside the external housing portion, and at least a blade holding member that rotatably holds a blade portion for cutting the inner wall portion of the manhole. A lower holding substrate on which a hydraulic motor for rotating the blade portion is arranged and at least from both side edge portions of the lower holding substrate, the upper holding portion is erected substantially in parallel with the vertical wall portion of the outer casing portion. The hose that supplies the hydraulic fluid for driving the hydraulic motor is inserted from the upper end of the hollow tubular cylindrical portion. The hollow tube Manhole inner wall cutting characterized by being connected to the hydraulic motor after being discharged to the outside of the hollow tubular cylindrical portion from a hole provided in the vicinity of the joint portion of the cylindrical portion with the external casing portion Machine.

  Since the manhole inner wall cutting machine according to the present invention adopts the above-described technical configuration, it can be easily and efficiently joined and fixed to the peripheral wall of the manhole cover receiving portion having any diameter from the outside of the manhole portion. In addition, even when the diameter of the concrete inner wall in the manhole is different or has a structure in which the diameter of the concrete inner wall changes in the middle, the predetermined value of the inner wall of the concrete is very accurately and easily obtained. Since the part can be cut along a predetermined direction, it has a very high versatility.

  Furthermore, according to the present invention, in a state where the fixed substrate 11 is placed on the manhole 4, the engagement fixing portion composed of the fixing bolt portion and the pressure contact piece portion provided at or near the tip of the substrate arm portion. Since the fixing bolt part is operated to operate and fix the pressure contact piece, the fixing operation can be performed reliably and at the desired position, and even if the fixing state may be loosened. The manhole is not lowered or dropped, so that it has an excellent effect of providing a safe device.

  Therefore, in the enterprise that performs the repair work of the manhole inner wall cutting manhole according to the present invention, it is not necessary to prepare a plurality of types of manhole inner wall cutting machines according to the type of manholes as in the past, and at the same time, the blade The inner wall cutting machine and the manhole inner wall are held very stably against various vibrations and shocks, and there is no displacement or deformation of the blade position. By prolonging the use period, it is possible to achieve an effect that the cost related to the repair work of the manhole is greatly reduced.

  Hereinafter, the configuration of a specific example of the manhole inner wall cutting machine according to the present invention will be described in detail with reference to the drawings.

  That is, FIG. 1 and FIG. 2 are views showing a configuration of a specific example of a manhole inner wall cutting machine 1 according to the present invention. In the figure, the manhole inner wall cutting machine 1 is a manhole inner wall cutting machine 1. The support member 2 is detachably fixed to the peripheral wall 3 of the substantially circular manhole cover receiving portion, and the circular rotary blade 6 suspended from the support member 2 toward the inside 5 of the manhole 4 is held. The support member 2 includes at least three substrate arm portions 13 that extend radially outward from the main body portion 12 in the vicinity of the central portion of the manhole 4, and each of the support members 2 includes a blade holding control unit 80. The manhole cover receiving portion peripheral wall 3 can be detachably engaged with and fixed to the front end of the substrate arm portion 13 or the vicinity 14 thereof, and slides in the longitudinal axis direction of each substrate arm portion 13. A base plate portion 11 provided with an engaging and fixing portion 15 including a pressure contact member that is configured to be able to function, and each column member 16 extending upward from each base plate arm portion 13 on the base plate portion 11; The auxiliary board 17 is configured to be engaged and slidable in the vertical direction along the axial direction of each column member 16. Each of the board 11 and the auxiliary board 17 includes the auxiliary board 17. A first opening 18 and a second opening 19 formed concentrically with the central axis of the manhole 4 are formed, and the first and second openings 18 and 19 include One hollow tubular cylinder portion 20 is penetrated at the same time, and the hollow tubular cylinder portion 20 is rotatable in the second opening 19 of the auxiliary substrate 17. The first of the substrates 11 is held. The mouth 18, the hollow tubular barrel portion 20 is and slidably brought held vertically rotatable.

  An upper end portion 21 of the hollow tubular tube portion 20 disposed on the upper surface of the auxiliary substrate 17 engages with an appropriate hollow tubular tube portion rotating means 22 provided on the auxiliary substrate 17. The lower end portion 23 disposed inside the manhole 4 of the hollow tubular tube portion 20 holds the blade portion 6 and rotates the blade portion 6 and slides in the front-rear direction. It is joined and fixed to a part of the blade holding control unit 80 for controlling the operation, and the blade holding control unit 80 is arranged so as to stand in parallel with each other with at least two predetermined intervals. And the outer casing portion 26 configured to connect the upper edges of the two vertical wall portions 24 and the upper connecting plate portion 25 joined to the lower end portion of the hollow tubular cylinder portion 20 and , Of the outer casing 26 A blade holding member 28 that rotatably holds at least the blade portion 6 for cutting the inner wall portion 27 of the manhole 4, and a hydraulic motor 29 that rotationally drives the blade portion 6. Is disposed on the lower holding substrate 30 and the auxiliary wall portion 31 erected substantially parallel to the vertical wall portion 24 of the outer casing portion 26 upward from at least both side edge portions of the lower holding substrate 30. However, a hose 33 for supplying a hydraulic fluid for driving the hydraulic motor 29 is provided from the upper end 21 of the hollow tubular tube portion 20. After being inserted and discharged to the outside of the hollow tubular cylinder part 20 from the hole 34 provided in the vicinity of the joint part of the hollow tubular cylinder part 20 with the external housing part 26, the hydraulic motor 29 Manhole inner wall cutting machine 1 to which it is connected are shown.

  If the configuration of the manhole inner wall cutting machine 1 according to the present invention is described in more detail, first, the support member 2 of the manhole inner wall cutting machine 1 according to the present invention is the manhole inner wall cutting machine according to the present invention. Since the machine can be detachably fixed to the peripheral wall portion of the manhole cover receiving portion and can be securely supported and fixed to the peripheral wall portion of the manhole cover receiving portion having an arbitrary diameter, the manhole inner wall cutting machine 1 It gives versatility.

  That is, the engagement fixing portion 15 provided at the tip end portion 14 of the substrate arm portion 13 radially extending from the substrate 11 used in the manhole inner wall cutting machine 1 in the present invention is the manhole described above. This is one factor that gives the inner wall cutting machine 1 great versatility.

  More specifically, as is apparent from FIGS. 1 to 6, in one specific example of the manhole inner wall cutting machine 1 according to the present invention, the substrate 11 constituting the support member 2 includes: At least three substrate arm portions 13 extending radially outward from the main body portion 12 in the vicinity of the central portion of the manhole 4 are formed, and the manhole cover is formed at the tip of the substrate arm portion 13 or in the vicinity 14 thereof. For example, the pressure contact piece 41 and the pressure contact piece 41 configured to be slidably engaged with and fixed to the receiving peripheral wall 3 and to be slidable in the longitudinal axis direction of the respective board arm portions 13 are screwed. An engagement fixing portion 15 is provided that includes a fixing bolt portion 40 that is slid through the mechanism.

  The engagement fixing member 15 is a rotatable rod member in which an appropriate screw is formed in the space groove portion 42 formed in the distal end portion 14 of the substrate arm portion 13 along the longitudinal direction of the substrate arm portion 13. 43 is rotatably supported, and an appropriate fixing bolt 40 is fitted to a portion protruding from the distal end portion 14 of the substrate arm portion 13 at the distal end portion of the rod member 43, and the fixing bolt 40 is moved in an arbitrary direction. The pressure contact piece 41 can be slid in the longitudinal axis direction of the substrate arm portion 13 by rotating the contact arm 41.

  With this configuration, the pressure contact piece 41 is directly or indirectly brought into pressure contact with the inner wall 44 of the peripheral hole wall 3 of the manhole cover receiving portion 3 and is detachably fixed to the manhole 4, and when the manhole inner wall portion 27 is cut by the blade 6. The accompanying reaction force is received by the inner wall 44.

  Further, the pressure contact piece 41 constituting the fixing member 15 in the present invention is provided with an appropriate through-hole portion in which an appropriate screw is formed on the inner surface, for example, and the through-hole portion is It engages with a rod member 43 having a screw, and is configured by projecting a pressure contact portion 45 at a lower portion thereof. It has the structure which protruded to the lower surface side through.

  In the present invention, for example, a plurality of (three in the embodiment) pressure contact screws 47 are preferably provided in the pressure contact portion 45 of the pressure contact piece 41.

  With this configuration, even if the tip of the pressure contact screw 47 makes point contact with the inner wall 44 of the manhole 4 to increase the fixing strength of the fixing member 15 and the inner wall 44 of the manhole 4 is uneven. Although it is intended to absorb the unevenness and reliably contact the inner wall 44 of the manhole 4, there is no problem even if the pressure contact portion 45 is brought into direct contact with the inner wall 44. It is.

  By using a plurality of the pressure contact screws 47, the amount of protrusion of each screw 47 from the pressure contact portion 45 of the pressure contact piece 41 is adjusted to further absorb unevenness of the inner wall 44 of the peripheral wall portion of the manhole cover receiving portion. It can be done reliably.

  In the support member 2 according to the present invention, by operating the fixing bolt 40 disposed on each substrate arm portion 13, the press contact piece 41 slides back and forth along the space groove portion 42, and the press contact piece 41 The pressure contact portion 45 or the pressure contact screw 47 is pressed against the inner wall 44 of the peripheral wall portion of the manhole cover receiving portion, and the fixed substrate 11 is fixed to the inner wall 44 via the pressure contact piece 41 in at least three radial directions. 4 is securely fixed to the peripheral wall 3 of the manhole cover receiving portion 4, and the detachment operation can be easily performed by loosening the fixing bolt 40.

  Further, the support member 2 according to the present invention is a column member 16 in which a screw portion is formed on the surface of a predetermined portion of the fixed substrate 11 in the longitudinal direction (radial direction) of each substrate arm portion 13. Are properly installed, and an appropriate receiving nut 51 is screwed to the support member 16.

  On the other hand, the auxiliary substrate 17 corresponding to the substrate portion 11 preferably has a shape substantially similar to the substrate portion 11, and the auxiliary substrate 17 is a main body near the center of the manhole 4. At least three auxiliary substrate arm portions 61 extending radially outward from the portion 60 in a direction coinciding with the extending direction of the substrate arm portion 13 are formed. The vicinity 62 is provided with a through hole 63 through which one end of the column member 16 penetrates.

  The extension length of the auxiliary board arm portion 61 is preferably set shorter than the extension length of the board arm portion 13.

  Therefore, the auxiliary substrate 17 is engaged with the tip portions of the three support members 16 by the through holes 63, and the tightening nut 52 is screwed into the surface of the auxiliary substrate arm portion 61 with the tip portions of the support members 16. The auxiliary board 17 is tightened (clamped) by the receiving nut 51 and the tightening nut 52, and the vertical position of the support column member 16 can be set at an appropriate position and placed at that position.

  That is, the vertical position of the auxiliary board 17 changes depending on the movement position of the receiving nut 51 along the member 16, and the displacement state position is determined by tightening of the auxiliary board 17 by the receiving nut 51 and the tightening nut 52. Maintained.

  In other words, at the same time that the support nut 51 is fixedly held by the support nut 51 at a predetermined interval, the auxiliary substrate 17 changes the position of the support nut 51 to change the position of the support nut 51. It is possible to adjust the vertical interval with the portion 11 as appropriate.

  That is, in the present invention, the arrangement position of the blade portion 6 in the height direction in the manhole 4 is adjusted by changing the relative distance between the auxiliary substrate 17 and the fixed substrate 11. It is possible to do.

  In the present invention, for example, when the manhole 4 is formed on an inclined ground, the manhole inner wall cutting machine 1 according to the present invention is fixed on the inclined manhole. The manhole according to the inclined state of the manhole by changing and adjusting the position of the support nut 51 provided in each of the strut members 16 at the time of placement. The installation state of the inner wall cutting machine 1 can be set.

  On the contrary, even when the manhole inner wall cutting machine 1 is to be horizontally installed and fixed on the horizontal manhole 4, the adjustment operation of the receiving nut 51 is useful.

  For this purpose, it is desirable to provide a level 103 on at least a part of each of the substrate arm portions 13.

  Next, in the present invention, a first opening 18 and a second opening 19 formed concentrically with the central axis of the manhole 4 in each of the substrate 11 and the auxiliary substrate 17. Are formed, and appropriate hollow support tube portions 50 and 55 are attached to the first opening 18 and the second opening 19, respectively. The single hollow tubular cylinder 20 is passed through the openings 18 and 19 at the same time through 50 and 55.

  On the other hand, the hollow tubular cylinder 20 is configured such that the hollow tubular cylinder 20 is rotatably held by the second opening 19 of the auxiliary substrate 17. In the portion 18, the hollow tubular tube portion 20 is held so as to be rotatable and slidable in the vertical direction.

  Specifically, the upper end portion 21 of the hollow tubular tube portion 20 disposed on the upper surface of the auxiliary substrate 17 is an appropriate hollow tubular tube portion rotating means provided on the auxiliary substrate 17. 22 is configured to rotate freely.

  That is, an appropriate hooking material 23 is provided on the upper end 21 protruding from the support cylinder 55 of the hollow tubular tube portion 20, and the hooking material 23 is received and supported by the support cylinder 55. A rotation drive shaft 53 is provided on one auxiliary arm portion 61 of the auxiliary board 17 so as to be freely rotatable, and is formed on the outer surface of the hooking material 23 via an appropriate rotation transmission device, for example, a gear and a chain 54. In cooperation with the ratchet gear 56, the rotary drive shaft 53 is rotated by an operation of an operation lever (not shown) or the like for driving the drive shaft 53 by appropriate drive means such as a motor or by human power. Further, the reverse rotation is regulated by a ratchet device (reverse rotation prevention device) comprising a ratchet gear 56 provided on the latching material 23, a latching claw 57 meshing with the ratchet gear 56, and a coil spring (not shown). .

  With the above-described configuration of the present invention, as will be described later, the blade holding control unit 80 that holds the blade unit 6 and controls the blade unit 6 is provided with at least one of the inner wall portions 27 of the manhole unit 4. The blade portion 6 can be rotated in the manhole portion 4 so as to be cut along a plane perpendicular to the central axis of the manhole portion 4 in the portion.

  As will be described later, the hollow tubular cylindrical portion 20 used in the present invention is required to stably hold a strong and heavy blade holding mechanism, and at the same time, the inside thereof is used for a hydraulic motor. Therefore, it is desirable that the hose supplying the fluid is made of light and high strength metal, and the diameter is at least 60 mm.

  Further, as shown in FIGS. 7 to 10, the lower end portion 23 disposed inside the manhole 4 of the hollow tubular tube portion 20 is disposed upright in parallel with each other with at least two predetermined intervals. An outer casing portion 26 composed of a vertical wall portion 24 and an upper connecting plate portion 25 that connects upper edges of the two vertical wall portions 24, and slides inside the outer casing portion 26. A blade holding member 28 that rotatably holds at least the blade portion 6 for cutting the inner wall portion 27 of the manhole 4 and a hydraulic motor 29 that rotationally drives the blade portion 6 are disposed. The lower holding substrate 30 and the auxiliary wall portion 31 erected substantially parallel to the vertical wall portion 24 of the outer housing portion 26 upward from at least both side edge portions of the lower holding substrate 30. Configured inside The lower end portion 23 of the hollow tubular tube portion 20 is connected to the upper portion of the outer casing portion 26. The connecting plate part 25 is joined and fixed.

  A further feature of the present invention is that a hose 33 for supplying a hydraulic fluid for driving the hydraulic motor 29 is inserted from the upper end portion 21 of the hollow tubular tube portion 20, and the hollow tubular tube portion 20. After being discharged from the hole 34 provided in the vicinity of the joint portion of the hollow tubular tube portion 20 with the external housing portion 26 to the outside of the hollow tubular tube portion 20. It is connected to the hydraulic motor 29.

  With this configuration, the manhole inner wall cutting machine 1 can efficiently perform the cutting operation without the hose being entangled with the motor 29 or the blade portion, regardless of the direction of rotation. Become.

  The configurations of the external casing 26 and the internal casing 32 of the blade holding control unit 80 according to the present invention will be described in detail with reference to FIGS.

  That is, as is apparent from the cross-sectional views of FIGS. 8 and 9, the external casing 26 of the casing constituting the blade holding controller 80 used in the present invention has at least two predetermined sheets. The vertical wall portions 24 and 24 are arranged upright and parallel to each other with an interval of and an upper connecting plate portion 25 that connects the upper edges of the two vertical wall portions 24, and its cross section The shape is at least an inverted U-shape, but is not necessarily specified as an inverted U-shape, and may have a rectangular shape with a lower end surface closed.

  However, as will be described later, in order to slide the blade portion 6 provided in the internal housing portion 32 in the external housing portion 26, the lower end portion of the external housing portion 26 is opened. It is desirable that

  Each dimension of the external housing portion 26 is not particularly specified, but since it is necessary to be configured to be used for a plurality of types of manholes 4, it is generally used at present in the manholes. It is desirable to set the dimension so as to be movable inside the manhole 4 having the smallest diameter.

  For example, the width may be 270 mm, the height 157 mm, and the length 350 mm.

  In the present invention, the outer casing portion 26 is firmly joined to the hollow tubular tube portion 20, holds the blade portion 6 slidably, and accurately maintains the operating position of the blade portion 6. In addition, since it is necessary to completely prevent the blade portion 6 from vibrating or changing its position due to vibration or shock during operation, it is relatively lightweight, but has high strength and rigidity. It is desirable to be configured as a solid housing made of metal having

  In the present invention, the connection between the hollow tubular tube portion 20 and the upper connecting plate portion 25 of the external housing portion 26 is not particularly limited, but preferably the hollow tubular tube portion. The arrangement position relationship between the portion 20 and the external housing portion 26 is firmly and firmly connected so that the manhole inner wall cutting machine 1 is not deformed, twisted or vibrated during operation of the manhole inner wall cutting machine 1. It is desirable to adopt such a configuration.

  For this reason, in the present invention, it is desirable that both the outer casing portion 26 and the inner casing portion 32 are molded and finished with extremely high accuracy. The sliding portion is preferably finished to a level without substantial error.

  With such a configuration, it is preferable that the joint portion or the mutual facing portion of the both forms a state in which no rattling occurs.

  More preferably, an appropriate vibration damping material can be used in combination with the connection structure portion.

  For this purpose, the thickness of the side wall portion 24 and the upper connecting plate portion 25 of the external housing portion 26 is also adjusted as appropriate. When adjusting the weight and thickness, as shown in the figure, the side wall portion Appropriate spaces, holes, dents and cuts can be formed in a part of 24.

  Further, the fixing portion between the outer casing portion 26 and the hollow tubular tube portion 20 does not necessarily need to be at the center of the upper connecting plate portion 25, and the upper connecting plate portion 25 of the outer casing portion 26. It is also possible to displace from the central portion toward any end along the longitudinal direction.

  On the other hand, the internal housing portion 32 is configured to be slidably housed in the external housing portion 26, and at least the blade portion 6 for cutting the inner wall portion 27 of the manhole 4. A lower holding substrate 30 on which a blade holding member 28 that rotatably holds the blade and a hydraulic motor 29 that rotationally drives the blade portion 6 are disposed, and at least the inner housing portion 32 of the lower holding substrate 30 in the longitudinal direction. It is comprised from the auxiliary | assistant wall part 31 and 31 standingly arranged substantially in parallel with the vertical wall part 24 of the said external housing | casing part 26 toward the upper direction from the side edge parts 81 and 82 along.

  That is, the internal housing portion 32 has a U-shape that is a reverse cross-sectional shape with respect to the external housing portion 26, but is not necessarily specified as a U-shape, and the upper end surface is It may be a closed letter.

  However, as will be described later, it is necessary to slide the internal housing portion 32 in the external housing portion 26 in a state where a hydraulic hose is connected to the motor 29 provided in the internal housing portion 32. Therefore, it is desirable that the upper end portion of the internal housing portion 32 is open.

  Each dimension of the internal housing part 32 is not particularly specified, but the internal housing part 32 freely slides in the external housing part 26 according to the dimensions of the external housing part 26 described above. It is desirable to set the dimensions as possible.

  For example, the width may be 234 mm, the height may be 129.5 mm, and the length may be 320 mm.

  Further, the inner casing portion 32 is a suitable one in which both end edges 83 and 84 of the blade holding member 28 constituting the lower end portion are formed at the lower end portion of the side wall portion 24 of the outer casing portion 26. The sliding support members 85 and 86 are slidably joined with high precision through appropriate sliding assisting means such as a ball or roller bearing, magnetic bearing, fluid bearing or the like.

  The material of the internal housing part 32 may be the same as the material of the external housing part 26.

  On the other hand, the mechanism for positively executing the sliding operation between the external housing portion 26 and the internal housing portion 32 is not particularly limited, but one specific example is, for example, FIG. 7 to 9, an appropriate rack portion 91 is formed on the upper end portion 90 of the auxiliary wall portions 31, 31 of the internal housing portion 32, while the upper connection of the external housing portion 26 is formed. An appropriate slit portion 96 is provided in a portion corresponding to the upper end portion 90 of the auxiliary wall portions 31 and 31 of the internal housing portion 32 of the plate portion 25, and an appropriate pinion portion 93 is fitted into the slit portion 96. Engage with the rack portion 91 and rotate the pinion portion 93 through an appropriate rotation transmission means 95 (for example, a drive transmission means such as a cam, a gear, or a chain). The internal housing portion 32 , It is possible to slide only appropriate distance back and forth in its longitudinal direction.

  The rotation operation unit 94 according to the present invention may be driven manually or may be automatically driven by a motor or the like.

  The sliding movement distance of the internal casing 32 in the present invention is not particularly limited, but the combination of the diameter of the existing manhole 4 having the maximum diameter and the diameter of the usable blade portion. It is possible to decide arbitrarily.

  In the present invention, the rotation motor for the blade portion 6 mounted on the lower holding substrate 30 of the inner housing portion 32 is often used in the presence of water in the manhole inner wall cutting machine 1. Therefore, it must be a hydraulic motor.

  On the other hand, the blade holding member 28 mounted on the lower holding substrate 30 can be any known shaft holding member as long as it has a shaft holding function including an appropriate bearing.

  Further, any known rotational conduction means can be used for connection between the blade portion 6 and the hydraulic motor. In the specific example of FIG. 7, a chain or a belt is used.

  As shown in the specific example of FIG. 7, in the manhole inner wall cutting machine 1 according to the present invention, in the initial state of the manhole inner wall cutting machine 1, the position of the hydraulic motor is It arrange | positions in the vicinity position of the said hollow tubular cylinder part 20 arrange | positioned in the site | part close | similar to the edge part of the said upper connection board part 25 of the housing | casing part 26. FIG.

  On the other hand, in the present invention, a hose 33 for supplying a hydraulic fluid for driving the hydraulic motor 29 is inserted from the upper end portion 21 of the hollow tubular tube portion 20, and After passing through the inside, it is discharged from the hole 34 provided in the vicinity of the joint portion with the external housing portion 26 to the outside of the hollow tubular tube portion 20 and then connected to the hydraulic motor 29. desirable.

  By adopting such a configuration, the hose 33 disappears from the main part of the manhole inner wall cutting machine 1, the appearance is clean, the operation is easy, and the blade portion 6 is swiveling. Since it does not get in the way, the operation is smooth and efficient.

  That is, in the present invention, the internal casing 32 can slide out and retract from the external casing 26 so that the blade section 6 rotated by the hydraulic drive motor 29 is provided. It is possible to move the manhole 4 in the radial direction, that is, with respect to the inner wall 27 so as to freely advance and retract.

  However, in the present invention, the internal housing portion 32 that rotatably holds the blade portion 6 is composed of a double box-type housing portion, and therefore the blade portion holding control portion 80 itself. Since the internal housing portion 32 slides in a state where the variation is not substantially generated inside the external housing portion 26 with high accuracy. At the same time, the blade portion 6 is held in the manhole inner wall cutting machine 1 even when the manhole inner wall cutting machine 1 is in operation. It is possible to continue high-speed rotation at a precisely set portion without being affected by vibrations or shocks, and further, when the blade part turns in the manhole 4, Setting position of the blade section 6 Since it is possible to maintain a stable position without any deviation, the operation efficiency is improved, and the cut surface of the cut concrete is well finished with a certain shape, which has a positive effect on the subsequent work. In addition, since the damage to the blade is remarkably reduced, the life of the blade can be extended and the cost can be reduced.

  Further, the blade portion 6 according to the present invention is attached to the internal housing portion 32, and the internal housing portion 32 is driven by the rack and pinion mechanism, so that the moving position is fine. In addition, the pushing force of the blade portion 6, that is, the pressure with which the blade portion 6 abuts against the concrete inner wall can be remarkably improved as compared with the conventional system. The cutting operation can also be performed accurately and efficiently in a short time.

  As is clear from the above description, the manhole inner wall cutting machine 1 according to the present invention is placed on the lower side of the hollow tubular tube portion 20 using, for example, appropriate hanging means in an appropriate manhole 4. The fixed substrate 11 of the support unit 2 is placed on the peripheral wall 3 of the manhole cover receiving part of the manhole 4 so that the fixed blade holding control unit 80 is locked, and the fixing screw 40 is attached. The pressure contact piece 41 is moved by operation to fix the manhole inner wall cutting machine 1 on the peripheral wall portion 3 of the manhole cover receiving portion as described above, and then to the support provided on the support member 16. The nut 51 is rotated in an arbitrary direction, and the blade unit 6 provided in the blade holding control unit 80 is accurately arranged at a preset cutting position.

  Thereafter, the rotation and operation unit 94 provided in the blade holding control unit 80 is operated to drive the rack and pinion mechanisms 91 and 93 so that the tip of the blade unit 6 is made of the concrete inner wall of the manhole 4. At the same time, the rotation of the hydraulic motor 29 is started, the cutting of the concrete inner wall portion is started, and the position of the tip portion of the blade is gradually operated while the rotation operation portion 94 is operated while the concrete inner wall is moved. The blade portion 6 is allowed to enter, and the blade portion 6 is maintained at the cutting position.

  Thereafter, by rotating the rotation transmission device 53 provided on the auxiliary substrate 17 in an appropriate direction, the blade holding control unit 80 is moved in the manhole 4 around the hollow tubular cylinder 20. Thus, the blade portion 6 is moved along the inner wall surface 27 of the manhole 4 in a plane orthogonal to the central axis of the manhole 4.

  While the operation is being continued, the blade unit 6 further continues the operation of gradually projecting outward from the blade holding control unit 80, so that the tip portion of the blade unit 6 has a predetermined depth set in advance. That is, it is made to project to a predetermined length in the thickness direction of the concrete inner wall.

  In the present invention, it is desirable to select and set the material of the blade portion 6 or the shape of the blade so that the bolt is also cut even when the concrete inner wall portion includes a bolt.

  When the cutting operation of the inner wall portion of the manhole is completed by the above operation, the hydraulic motor 29 and the like are stopped, and the fixing screw 40 and the inner housing portion 32 and the like are returned to their original positions, whereby the manhole inner wall is restored. The cutting machine 1 is removed from the manhole 4 and the cutting operation is completed.

  In the manhole inner wall cutting machine 1 according to the present invention, as shown in FIG. 1 or FIG. 3, a plurality of suspension hook portions are provided at appropriate portions of the substrate 11 of the support member 2. It is desirable that a hook receiving portion 101 to be fitted with (not shown) is provided.

  Furthermore, in the present invention, in order to set the blade holding control unit 80 at a predetermined portion inside the manhole 4, the supporting nut 51 is rotated manually or using appropriate automatic rotating means. However, since the position adjustment operation takes time and the position adjustment range is also limited, as shown in FIG. 11, the upper surface of the peripheral wall 3 of the manhole cover receiving portion A cylindrical tube having substantially the same diameter as the peripheral wall portion 3 of the manhole cover receiving portion, having an appropriate height, and detachably joined and fixed to the upper edge portion of the peripheral wall portion of the manhole cover receiving portion; A cylinder having a truncated cone shape is prepared separately as an auxiliary jig 102, and if necessary, the auxiliary jig 102 is mounted on the peripheral wall portion 3 of the manhole cover receiving portion and the manhole is mounted. The inner wall cutting machine 1 is connected to the auxiliary jig 10. It is also possible to fix above.

  It is desirable that the diameter of the auxiliary jig 102 be easily selected from a plurality of types according to the manhole cover receiving portion peripheral wall 3 used for the existing manhole 4, and the height of the auxiliary jig 102 is arbitrary. However, it is desirable to prepare the auxiliary jig 102 having a plurality of types of heights in advance.

  That is, in the present invention, in order to set the blade holding control unit 80 at a predetermined portion inside the manhole 4, first, the position of the blade is adjusted using the jig 102 for main position adjustment. The position of the blade is efficiently set in a short time by adjusting so that it is positioned in the vicinity of the desired setting position and then performing a fine adjustment operation using the position adjusting means of the support member. I can do it.

FIG. 1 is a cross-sectional view illustrating the configuration of a specific example of a manhole inner wall cutting machine according to the present invention. FIG. 2 is an enlarged cross-sectional view illustrating the configuration of a specific example of a manhole inner wall cutting machine according to the present invention. FIG. 3 is a plan view showing the configuration of a specific example of the substrate portion used in the support member according to the present invention. FIG. 4 is a plan view showing the configuration of a specific example of the auxiliary substrate portion used in the support member according to the present invention. FIG. 5 is a sectional view showing an engaged state between the auxiliary substrate portion and the hollow tubular tube portion in the support member according to the present invention. FIG. 6 is a plan view for explaining the positional relationship between the substrate portion and the auxiliary substrate portion in the present invention. FIG. 7 is a side view showing the configuration of a specific example of the blade holding control unit according to the present invention. FIG. 8 is a cross-sectional view showing a configuration of a specific example of the blade holding control unit according to the present invention. FIG. 9 is a cross-sectional view showing the configuration of a specific example of the blade holding control unit according to the present invention. FIG. 10 is a plan view showing the configuration of a specific example of the blade holding control unit according to the present invention. FIG. 11 is a perspective view showing the configuration of a specific example of the auxiliary jig according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Manhole inner wall cutting machine 2 Support member 3 Manhole cover receiving part peripheral wall part 4 Manhole 5 Manhole inside 6 Blade part 11 Substrate part 12 Main body part 13 Substrate arm part 14 The front end of the substrate arm part or its vicinity 15 Engagement fixing part 16 Support member 17 Auxiliary substrate 18 First opening portion 19 Second opening portion 20 Hollow tubular tube portion 21 Upper end portion of hollow tubular tube portion 22 Hollow tubular tube portion rotating means 23 Hanging material 24 Vertical wall portion 25 Upper connecting plate portion 26 External housing portion 27 Inner wall portion of manhole 28 Blade holding member 29 Hydraulic motor 30 Lower holding substrate 31 Auxiliary wall portion 32 Internal housing portion 33 Hose 35 Lower end portion of hollow tubular tube portion 40 Fixing bolt portion 41 pressure contact piece 42 space groove portion 43 rod member 44 inner wall of peripheral wall portion of manhole cover receiving portion 45 pressure contact portion 50 hollow support tube Part 51 Support nut 55 Hollow support cylinder part 52 Clamping nut 53 Rotation drive shaft 54 Rotation transmission device 56 Ratchet gear 57 Latching claw 60 Auxiliary board body part 61 Auxiliary board arm part 63 Through hole 80 Blade holding control part 83 84, both edge portions 85, 86 of the blade holding member 90 Sliding support member 90 Upper end portion of auxiliary wall portion 91 Rack portion 93 Pinion portion 94 Rotating operation portion 95 Rotation transmitting means 96 Slit portion 101 Hook receiving portion 102 Auxiliary jig 103 Level

Claims (11)

A manhole inner wall cutting machine, the manhole inner wall cutting machine,
A support member that is detachably fixed to the peripheral wall of the substantially circular manhole cover receiving portion;
It is joined and fixed to the support member, and is composed of a blade holding control member that holds a circular rotary blade that is suspended from the support member so as to move up and down from the manhole.
The blade holding control unit connects at least two vertical wall portions erected in parallel with each other at a predetermined interval and upper edges of the two vertical wall portions, and the support member An external housing part composed of an upper connecting plate part joined and fixed to a part;
A blade holding member that is slidably housed inside the outer casing and at least holds a blade for cutting the inner wall of the manhole, and a hydraulic motor that rotates the blade. Are arranged on the lower holding substrate and an auxiliary wall portion that is erected substantially parallel to the vertical wall portion of the outer casing portion upward from at least both side edge portions of the lower holding substrate. And an internal housing portion sliding control means for sliding the internal housing portion with the external housing portion. Manhole inner wall cutting machine characterized by. A manhole inner wall cutting machine, the manhole inner wall cutting machine,
A support member that is detachably fixed to the peripheral wall of the substantially circular manhole cover receiving portion;
A blade holding control member that holds a circular rotating blade suspended from the support member toward the inside of the manhole,
The support member is at least three substrate arm portions extending radially outward from a main body portion in the vicinity of the manhole center portion, and the manhole cover receiving portion is provided at or near the tip of each substrate arm portion. A substrate portion provided with an engagement fixing portion including a pressing member configured to be detachably engageable and fixed to the peripheral wall portion and slidable in the longitudinal axis direction of each of the substrate arm portions;
Auxiliary members configured to engage with respective support members extending upward from the respective substrate arm portions on the substrate and to be slidable in the vertical direction along the axial direction of the support members. A substrate,
Each of the substrate and the auxiliary substrate has a first opening and a second opening formed concentrically with the central axis of the manhole, and the first and second openings are formed. One hollow tubular cylinder portion is simultaneously penetrated through the opening of the hollow tubular cylinder portion, and the hollow tubular cylinder portion is rotatable at the second opening portion of the auxiliary substrate. However, in the first opening of the substrate, the hollow tubular tube portion is held rotatably and slidable in the vertical direction.
The upper end portion of the hollow tubular tube portion, which is disposed on the upper surface of the auxiliary substrate, is configured to freely rotate by engaging with the appropriate hollow tubular tube portion rotating means provided on the auxiliary substrate. In addition, the lower end portion of the hollow tubular tube portion disposed inside the manhole is joined and fixed to a part of the casing portion of the blade holding control unit that holds and controls the blade portion. The holding control unit connects at least two vertical wall portions that are erected in parallel with each other at a predetermined interval and upper edges of the two vertical wall portions, and the hollow of the support control member. An outer housing part composed of an upper connecting plate part joined and fixed to at least a part of the lower end part of the cylindrical tubular part,
A blade holding member that is slidably housed inside the outer casing and at least holds a blade for cutting the inner wall of the manhole, and a hydraulic motor that rotates the blade. Are arranged on the lower holding substrate and an auxiliary wall portion that is erected substantially parallel to the vertical wall portion of the outer casing portion upward from at least both side edge portions of the lower holding substrate. The internal housing part,
Of course, a hose that supplies hydraulic fluid for driving the hydraulic motor is inserted from the upper end of the hollow tubular cylinder, and is near the joint of the hollow tubular cylinder with the external housing. A manhole inner wall cutting machine which is connected to the hydraulic motor after being discharged to the outside of the hollow tubular tube portion from the hole provided in the tube.   The hollow tubular tube portion has a gear portion fitted and fixed to a part of the hollow tubular tube portion protruding on the auxiliary substrate, and the gear portion is connected via a predetermined gear train. It is connected to a manual or automatic hollow tubular cylinder rotation operating section provided on the auxiliary substrate, and the gear section is further engaged with a reverse rotation preventing means of the hollow tubular cylinder section. The manhole inner wall cutting machine according to claim 2, wherein:   4. The manhole inner wall cutting machine according to claim 2, wherein a hook receiving portion that is fitted to the hanging hook portion is provided on at least a part of the substrate.   The manhole inner wall cutting machine according to any one of claims 2 to 4, wherein a level is provided for each of the substrate arm portions or the auxiliary substrate.   The arrangement position of the blade in the manhole in the height direction is configured to be adjustable by changing the relative distance between the auxiliary board and the fixed board. The manhole inner wall cutting machine according to any one of claims 2 to 5, characterized in that:   The blade holding control unit can be swung along the inner wall portion in the manhole portion by the operation of the hollow tubular tube portion rotation operation portion provided on the support member, and the blade portion can be moved to the inner wall of the manhole portion. A function of rotating in the manhole part so as to cut along a plane perpendicular to the central axis of the manhole part in at least a part of the part and moving back and forth in the manhole part along the diameter direction. The manhole inner wall cutting machine according to any one of claims 2 to 6, wherein the inner wall cutting machine is a thing.   The manhole inner wall cutting machine according to any one of claims 2 to 7, wherein a lower end portion of the outer casing portion and a lower end portion of the inner casing portion are joined to be slidable with each other.   The rack structure portion is provided at the upper edge portion of the vertical wall portion of the inner housing portion, and the position of the upper edge portion of the vertical wall portion of the inner housing portion at the upper connection portion of the outer housing portion And a pinion structure portion that meshes with the rack structure portion through a slit portion that has a predetermined width and a predetermined length, and is provided with a suitable rotational drive mechanism. 9. The manhole inner wall cutting machine according to claim 8, wherein the manhole inner wall cutting machine is configured to be rotated in accordance with the above.   10. The manhole inner wall cutting machine according to claim 9, wherein the rotation drive mechanism has a mechanism for manually or automatically rotating the pinion structure in forward and reverse directions.   It is a jig | tool used for the manhole inner wall cutting machine in any one of Claims 1 thru | or 10, Comprising: While engaging with the upper end edge of the said manhole cover receiving part peripheral wall part removably, the upper end edge part A manhole inner wall cutting machine jig having a cylindrical shape or frustoconical shape having a predetermined height, which is substantially the same as the diameter of the manhole cover receiving portion, capable of fixing the support member to the base plate.

Images