JP4825935B1 - Cutting equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting device capable of surely suppressing a decrease in forming accuracy of a groove even in a configuration in which a spindle of a cutting blade is held at one end thereof.
A cutting apparatus for forming a groove having a predetermined length on a groove forming surface,
A rail body installed along the groove forming direction, and a groove forming portion that is guided along the rail body to form a groove on the groove forming surface, and the groove forming portion rotates around a support shaft. A cutting blade that is driven to form a groove, a drive motor having a drive shaft for applying a rotational driving force to the cutting blade, and the drive motor is installed and guided in the groove forming direction along the rail body A guide body, and the drive motor is fixed to the guide body so that the drive shaft is along the groove forming direction, and the cutting blade has the support shaft orthogonal to the drive shaft and parallel to the groove forming surface. The groove forming portion further includes a support shaft holding member for holding the support shaft, the support shaft holding member is arranged side by side on the cutting blade, and one end portion side is fitted around the support shaft. A cutting apparatus in which an end side is fixed to the guided body.
[Selection] Figure 1

Description

  The present invention relates to a cutting apparatus, and is used, for example, to form a groove in which an electrode for anticorrosion for electrically preventing corrosion of a reinforcing bar inside a cement concrete structure is installed.

  Various cutting apparatuses for forming a groove having a predetermined length on a surface portion of a workpiece such as a cement concrete structure (hereinafter simply referred to as “concrete structure”) have been proposed (for example, , See Patent Document 1 below).

  The cutting device disclosed in Patent Document 1 is provided with a rail body installed along a groove forming direction, a cutting blade that rotates around a support shaft to form a groove, and a rotational driving force applied to the cutting blade. And a carriage guided in the groove forming direction along the rail body. In this cutting apparatus, the spindle of the cutting blade is held at both ends, thereby suppressing the blurring of the cutting blade during rotational driving.

Japanese Patent Publication No. 60-39806

  However, depending on the cutting device, for example, a cantilever type in which a support shaft to which a cutting blade is attached is held at one end rather than at both ends may be employed due to the limitation of the size of the carriage. When cutting a hard surface such as concrete with a cutting device having such a configuration, the support shaft is not sufficiently held against vibrations transmitted from the cutting blade, and the cutting blade is shaken by the vibration. The movement becomes unstable, and as a result, the groove forming accuracy decreases.

  In view of the above problems, an object of the present invention is to provide a cutting apparatus that can reliably suppress a decrease in the forming accuracy of a groove even when the support shaft of a cutting blade is held at one end thereof.

The present invention is a cutting device for forming a groove having a predetermined length on a groove forming surface, a rail body installed along the groove forming direction, and guided along the rail body to the groove forming surface. A groove forming portion for forming a groove, and the groove forming portion includes a cutting blade that is rotationally driven around a support shaft to form a groove, and a drive shaft for applying a rotational driving force to the cutting blade. And a guided body that is installed and guided along the rail body in the groove forming direction. The drive motor is fixed to the guided body so that the drive shaft is along the groove forming direction. The cutting blade is disposed so that the support shaft is perpendicular to the drive shaft and parallel to the groove forming surface, and the groove forming portion further includes a support shaft holding member for holding the support shaft, The support shaft holding member is arranged side by side on the cutting blade, and one end portion is fitted on the support shaft and the other end portion is on the front side. Is fixed to the guided body, said rail member has a pair of guide rails which are spaced apart in the axial direction of the support shaft, the front end portion to each other of the two guide rails are connected and fixed by the connecting member, the guided body With the rail inserted between the guide rails from the rear end side of the guide rail, a rail spacing holding member that holds the separation distance between the rear end portions of both guide rails is detachable between the rear end portions of both guide rails. It is characterized by being provided, et al.

In the cutting apparatus having the above configuration, when the guided body is moved and guided along the rail body while the cutting blade is rotated by driving the drive motor, the cutting blade cuts the groove forming surface to the groove forming surface. A groove having a predetermined length is formed. At this time, an external force (for example, bending moment or vibration with the drive shaft of the drive motor as a fulcrum) acts on the support shaft. Since the support shaft holding member fixed to the guided body bears various external forces acting on the support shaft, the support shaft is prevented from being shaken, and thus the rotation state of the cutting blade is stabilized without shake. In the above configuration, after the guided body is inserted between the guide rails from the rear end side of the guide rails, the rail interval holding member is mounted between the rear end portions of the both guide rails, thereby Since the end portion does not widen, when the groove is formed on the groove forming surface by rotating the cutting blade and moving the guided body in the groove forming direction, deformation of the rail body is suppressed, and the guided body ( It is possible to prevent the (groove forming portion) from falling off.

In the cutting apparatus of the present invention, the drive motor can be configured to be fixed to the guided body by an attachment belt wound around the drive shaft. According to this configuration, even when an external force is transmitted from the support shaft to the drive motor, blurring (displacement) of the drive shaft of the drive motor is suppressed.

  In the cutting device of the present invention, the rail body may employ a configuration including side guide surfaces for guiding the guided body in the groove forming direction at both side surface portions of the guided body. According to this configuration, the side portion of the guided body abuts against the side guide surface, thereby suppressing displacement in a plane parallel to the groove forming surface of the guided body.

  In the cutting apparatus according to the present invention, the support shaft holding member is formed in a plate shape, and a tip end portion on one end portion side of the support shaft holding member protrudes forward with respect to the cutting blade, and the tip end portion is a guided body. A structure that abuts on the connecting body when the guide rail moves to the front end of the guide rail can be employed.

  In the above configuration, when the guided body is moved along the groove forming direction to the front end portion of the guide rail and the tip end portion of the support shaft holding member abuts on the coupling body, the guided body does not move any more, so the cutting blade Can be prevented from hitting the connector and being damaged.

  In the cutting apparatus according to the present invention, the guided body is a carriage provided with wheels spaced apart in the groove forming direction, and the support shaft of the cutting blade is disposed in front of the wheel shaft of the front wheel. A configuration can be adopted.

  If the spindle of the cutting blade is arranged in front of the wheel axle of the front wheel as in the above configuration, even if a large load (external force) is applied to the cutting blade from the groove forming surface side during groove formation By the reaction, an excessive load acting on the cutting blade due to the rear portion of the carriage rising from the guide rail can be avoided.

  According to the cutting device of the present invention, the support shaft holding member whose one end portion is externally fitted to the support shaft and whose other end portion is fixed to the guided body bears various external forces acting on the support shaft, thereby supporting the support shaft. Therefore, even if the cutting blade rotates in a stable posture without blurring, and thus the support shaft of the cutting blade is held at one end thereof, it is possible to reliably suppress a decrease in groove forming accuracy. .

It is a partially broken side view of the cutting state showing one embodiment of the present invention in use condition. It is a side view of a rail body including the pressing means. It is a rear view of the rail body including the pressing means. It is a top view of the rail body including the pressing means. It is a rear view of the rail space | interval holding | maintenance part. It is a top view of the groove formation part. It is a side view of the groove formation part. It is a rear view of the groove forming part. It is CC sectional view taken on the line in FIG. 6 of the groove formation part. It is the schematic side view showing the process (state in which the pre-drill was formed in the back surface of a bridge girder) of the groove formation. It is the schematic side view showing the process (state which inserted the rail body in the space) of the groove | channel formation. It is the schematic side view showing the process (state which attached the groove formation part to the rail body) of the groove formation. It is the schematic side view showing the process (state which raised the rail body) of the groove formation. It is a schematic side view showing the process of forming the groove (a state where the groove forming portion is moved forward to form a groove). It is side surface sectional drawing showing the same anode installation procedure (state which has filled the groove | channel with the 1st mortar). It is side surface sectional drawing showing the same anode installation procedure (state which has pressed the anode against the 1st mortar). It is front sectional drawing showing the same anode installation procedure (state which has pressed the anode against the 1st mortar). It is side surface sectional drawing showing the same anode installation procedure (state which has filled the groove | channel with the 2nd mortar). It is a perspective view of the anode installation part of the same anode installation apparatus. It is a top view of the anode installation part of the same anode installation apparatus. It is a rear view of the anode installation part of the same anode installation apparatus. It is a side view which combines the use condition of the anode installation part of the same anode installation apparatus.

  Hereinafter, a cutting device according to an embodiment of the present invention will be described. The cutting device according to the present embodiment is used to form a groove having a predetermined length on a groove forming surface of a structure. The cutting device is inserted in a narrow place and is useful for forming a groove on the groove forming surface in the narrow place. This groove is used, for example, as a groove for embedding a long anode (electrode for anticorrosion) made of a metal such as titanium in order to prevent corrosion of reinforcing bars arranged inside the structure.

  In addition, a narrow place here is a place where a pair of facing surfaces facing each other whose one facing surface is a groove forming surface cannot approach or difficult enough for an operator to enter. This is a place where the distance between the surfaces is 10 to 40 cm.

  As shown in FIG. 1, the cutting apparatus 1 includes a narrow space between a top end surface 3 of an abutment 2 that is a concrete structure and a back surface 5 of a bridge girder 4 that is a concrete structure facing the top end surface 3 in the vertical direction. A groove 7 having a predetermined width and a predetermined length is formed by using the back surface 5 as one opposing surface as a groove forming surface among the top end surface 3 and the back surface 5 as opposing surfaces that are inserted into a clear space 6. It is a device to do. In this case, the groove 7 is formed of a groove bottom surface and side surfaces that rise from the groove bottom surface and face each other in the lateral direction.

  The formation direction of the groove 7 is a linear direction along the span of the bridge beam 4 as indicated by an arrow 8 in FIG. Therefore, in the groove forming direction, the parapet 9 side of the abutment 2 is defined as the front side, and the opposite abutment (not shown) side as the opposite side is defined as the rear side. Moreover, the left-right direction (groove width direction) is defined toward the front, the right side is one side, and the left side is the other side.

  The cutting device 1 includes a rail body 10 that is used so as to contact the back surface 5, pressing means 11 </ b> A and 11 </ b> B that press the rail body 10 toward the back surface 5 side (upward), and a groove along the rail body 10. And a groove forming portion 12 movable in the forming direction (front-rear direction).

  As shown in FIGS. 2 to 4, the rail body 10 includes a top plate portion 13, a body portion 14, and guide rails 15 </ b> A and 15 </ b> B. In particular, the top plate portion 13 is integrally formed from three top plate components. That is, the top plate portion 13 includes a right top plate portion 16 on one side, a left top plate portion 17 on the other side, and a connecting body 18 that integrally connects and fixes the front end portions of the left and right top plate portions 16 and 17 together. It is configured and is formed in a U shape having a rear portion opened in plan view, thereby having a cutting blade protruding space 19 in the center portion in the left-right direction (see particularly FIG. 4).

  The top and bottom plate portions 16 and 17 on both the left and right sides are spaced apart in the left-right direction via the cutting blade protruding space 19. The right top plate portion 16 is set to have a smaller left / right width than the left top plate portion 17 (the left top plate portion 17 is set to have a larger left / right width than the right top plate portion 16).

  With this configuration, the entire cutting blade protruding space 19 is located on one side from the center of the rail body 10 in the left-right direction so that the other end 19a of the cutting blade protrusion space 19 is positioned at the substantially center in the left-right direction of the rail body 10. The position is shifted. The top plate portion 13 has a flat upper surface 20, and the upper surface 20 is a contact portion that contacts the back surface 5 of the bridge girder 4 from below. Specifically, the top plate portions 16 and 17 on both the left and right sides are a pair of contact portions that are spaced apart in the left and right direction via the cutting blade protruding space 19, and each top plate portion 16, The upper surface of 17 contacts the back surface 5 of the bridge girder 4 from below.

  The trunk portion 14 is configured in a frame shape to form a groove forming portion accommodating space for accommodating the groove forming portion 12 below the top plate portion 13, and includes a right top plate portion 16 and a left top plate portion. 17, body skeleton members 21 </ b> A and 21 </ b> B are provided on the lower side of each. Each trunk | skeleton part member 21A, 21B uses the thing of the same structure symmetrically. Each trunk | skeleton part member 21A, 21B is specifically formed in the cross-sectional shape of channel steel.

  In other words, the body skeleton members 21A and 21B are fixed to the bottom plates 22 and 23 parallel to the top plate portion 13 and the back surfaces of the right top plate portion 16 and the left top plate portion 17 parallel to the bottom plates 22 and 23, respectively. The fixed plates 24, 25 and the side plates 26, 27 standing from the ends of the bottom plates 22, 23 so as to integrate the bottom plates 22, 23 and the fixed plates 24, 25 (hanging down from the fixed plates 24, 25). As viewed, it is formed in a U-shaped cross section.

  The body portion 14 includes plate-like reinforcing ribs 28 on the outer sides in the left-right direction of the side plates 26 and 27. The reinforcing ribs 28 are arranged at predetermined intervals in the front-rear direction, and each reinforcing rib 28 is set to a width that does not protrude laterally from the bottom plates 22 and 23 (fixed plates 24 and 25).

  As the trunk skeleton members 21A and 21B are arranged below the right top plate portion 16 and the left top plate portion 17, respectively, the trunk skeleton members 21A and 21B are separated from each other in the left-right direction. (See FIG. 3). Each of the trunk skeleton members 21A and 21B omits a middle part in the front-rear direction for reasons described later, and the omitted parts are displaced forward and backward by the left and right trunk skeleton members 21A and 21B. The other side body skeleton member 21 </ b> B is disposed at a substantially central portion in the left-right direction of the left top plate portion 17.

  The body part 14 has mounting plate members 31 and 32 for attaching rail spacing members 30 (see FIG. 5) on the rear ends of the side plates 26 and 27 of the body frame members 21A and 21B, respectively, on the outer sides in the left-right direction. It is provided integrally so as to protrude. The mounting plate members 31 and 32 are arranged in the middle of the rear ends of the side plates 26 and 27, respectively. The attachment plate member 31 on one side is formed in a shape that has a simple rectangular lower portion cut out and has a lower protrusion amount to the right as compared with the upper protrusion amount to the right. The mounting plate member 32 on the other side is formed in a simple rectangular shape when viewed from the front.

  Further, the rail spacing member 30 is formed in a relative shape with the one side mounting plate member 31 and is overlapped with the mounting plate member 31 from the rear side, and the other side mounting plate member 32 is formed in a relative shape. The other side portion 30B that is superimposed on the mounting plate member 32 from the rear and the intermediate portion 30C between the one side portion 30A and the other side portion 30B are integrally formed in a plate shape. Further, post-mounting holes 30a and 30b are formed on the plate surfaces of the one side portion 30A and the other side portion 30B so as to match the pre-mounting holes 31a and 32a formed in the mounting plate members 31 and 32, respectively, in the front-rear direction. Has been.

  An intermediate upper portion of the intermediate portion 30C is cut out in the left-right direction, and an insertion cutout 30c for inserting a hook-shaped pressing tool described later is formed. Then, mounting bolts (not shown) are inserted into the rear holes 30a and 30b from the rear and screwed into the mounting front holes 31a and 32a, so that the rail interval holding member 30 is passed to the mounting plate members 31 and 32. Can be installed as.

  The trunk | drum 14 is further provided with cover 33A, 33B in which the cross section was formed in the shape of angle iron (unequal side angle iron). That is, the covers 33A and 33B are formed in an L-shaped cross section that is upside down, and are arranged with the long side portions 34 and 35 on the outside in the left and right direction and the short side portions 36 and 37 on the inside in the left and right direction. . In one cover 33 </ b> A, the upper surface of the short side portion 36 is fixed to the back surface of the fixing plate 24. The other cover 33 </ b> B has an upper surface fixed to the back surface of the left top plate portion 17 so that the inner end surface of the short side portion 37 is in contact with the outer end surface of the fixing plate 25.

  The covers 33A and 33B are respectively extended from the rear end portions of the trunk skeleton members 21A and 21B to positions where middle portions in the front-rear direction of the trunk skeleton members 21A and 21B are omitted. The covers 33A and 33B have different lengths in the front-rear direction. That is, the cover 33A on one side is formed to have a longer dimension than the cover 33B on the other side.

  The guide rails 15 </ b> A and 15 </ b> B are disposed in the groove forming portion receiving space so as to guide the groove forming portion 12 in the groove forming portion receiving space formed by the body portion 14. Specifically, the guide rails 15A and 15B are provided as a pair on the left and right sides, and are fixed to the opposing inner side surfaces (side plates 26 and 27) of the trunk skeleton members 21A and 21B, respectively. Each guide rail 15A, 15B has an upper wall 38, 39 along the left-right direction, a lower wall (guide wall) 40, 41 below the upper wall 38, 39 and parallel to the upper wall 38, 39, The walls 38, 39 and the lower walls 40, 41 are formed in a U-shaped cross section from the vertical walls 42, 43 that integrally connect the walls 38, 39.

  In the present embodiment, the upper surfaces of the lower walls 40 and 41 are guide surfaces 40a and 41a for guiding the groove forming portion 12 in the groove forming direction, and are provided on the top plate portions 16 and 17 on both the left and right sides as contact portions. On the other hand, it is spaced apart and arranged on the top end face 3 side as the other facing surface. Further, the inner surfaces of the vertical walls 42 and 43 are side guide surfaces 42a and 43a for guiding the first cart 60 in the groove forming direction with both side surfaces 60a and 60a of the first cart 60 described later. These guide rails 15A and 15B are formed lower than the height of the trunk skeleton members 21A and 21B, and are arranged at the same height position in the middle of the inner surface in the vertical direction. Opposite (facing inward).

  Spacers 44 and 45 are interposed between the upper wall 38 of the guide rail 15A and the right top plate portion 16, and between the upper wall 39 of the guide rail 15B and the left top plate portion 17, respectively. Further, a rib-like support member 46 that supports the lower wall 40 is integrally attached so as to cover the lower surface of the lower wall 40 of the guide rail 15A and the lower portion of the side plate 26 of the trunk skeleton member 21A. A rib-like support member 47 that supports the lower wall 41 is integrally attached so as to cover the lower surface of the lower wall 41 of the guide rail 15B and the lower portion of the side plate 27 of the trunk skeleton member 21B. A plurality of these support members 46 and 47 are arranged at predetermined intervals in the front-rear direction.

  Next, the pressing means 11A and 11B will be described. One pressing means 11A, 11B is provided on each of the left and right sides of the rail body 10 (provided as a pair of left and right). These pressing means 11A and 11B are jacks (see FIG. 2). More specifically, the pressing means 11A and 11B are pantograph jacks in which link members 55, 56, 57, and 58 are combined.

  The pressing means 11A, 11B are arranged in the region of the trunk skeleton members 21A, 21B where the middle part in the front-rear direction is omitted. As described above, the omitted parts are the left and right trunk skeleton members 21A, 21B. Therefore, the left and right pressing means 11A, 11B are also displaced in the front-rear direction (groove forming direction). Any one of the pair of pressing means 11A and 11B may be front and any may be rear. In the present embodiment, the pressing means 11A on one side is disposed in front of the pressing means 11B on the other side.

  The upper portions 48 and 49 of the pressing means 11A and 11B are fixed to the left and right outer portions of the back surfaces of the right top plate portion 16 and the left top plate portion 17, respectively. That is, the pressing means 11 </ b> A and 11 </ b> B are contained within the left and right width of the top plate part 13. Thereby, even if the cutting device 1 includes the pressing means 11 </ b> A and 11 </ b> B separately from the rail body 10, the lateral width of the entire cutting device 1 does not exceed the lateral width of the rail body 10. The lower portions 50 and 51 of the pressing means 11A and 11B are free without being fixed to the rail body 10.

  The cutting device 1 includes operation members 52 and 53 for operating the vertical height (extension / contraction) of the pressing means 11A and 11B. The operation members 52 and 53 are screw shaft members and are screwed from the rear to an operation block 54 (only the pressing means 11A on one side in FIG. 2 is shown) which is a nut member provided by the pressing means 11A. . By the rotation of the operation members 52 and 53 around the axis, the pressing means 11A and 11B are expanded and contracted in the vertical direction by changing the connecting angle between the link members 55, 56, 57 and 58. Further, the operation members 52 and 53 are supported by the rail body 10 so that the middle portions in the axial direction pass through the insides of the covers 33A and 33B.

  Next, the groove forming portion 12 will be described with reference to FIGS. The groove forming part 12 includes a first carriage 60, a drive motor part 61 fixed to the first carriage 60, and a cutting blade 62 connected to a drive shaft of a motor (not shown) provided in the drive motor part 61. The support shaft holding member 63 and a duct portion 64 for sucking concrete dust are provided.

  The first carriage 60 is a guided body that is movable along guide surfaces 40a and 41a (see FIGS. 7 and 8) that are upper surfaces of the lower walls 40 and 41 of the guide rails 15A and 15B. As shown in FIG. 6, the first carriage 60 is formed of a rectangular plate member having a longitudinal direction in the front-rear direction when seen in a plan view. Casters (wheels) 65 </ b> A and 65 </ b> B are attached to the four corners of the back surface of the first carriage 60 so as to be rotatable around the left and right lateral wheel shafts. Therefore, the casters 65A and 65B are disposed on the front and back of the back surface of the first carriage 60, and are also disposed on the left and right side surfaces. These casters 65A and 65B are placed on the guide surfaces 40a and 41a of the guide rails 15A and 15B, and the first carriage 60 is guided in the front-rear direction.

  As shown in FIG. 7, in a state in which the first carriage 60 is moved horizontally, the pair of left and right casters 65A on the front side has a rotation center axis (wheel axis) of the pair of left and right casters 65B on the rear side. It is attached to the first carriage 60 via an attachment member (not shown) so as to be positioned below the rotation center axis (wheel axis). Both casters 65A and 65B are set to have the same diameter.

  Side end surfaces (side portions) 60a, 60a on the left and right sides of the first carriage 60 are flat surfaces (smooth surfaces) along the vertical direction. These left and right side end surfaces 60a, 60a are surfaces that can come into contact with inner surfaces (corresponding to side guide surfaces) 42a, 43a of the vertical walls 42, 43 of the guide rails 15A, 15B. In other words, when the first carriage 60 is attached to the rail body 10, the displacement in the left-right direction is regulated loosely by the inner surfaces 42a, 43a of the vertical walls 42, 43.

  As shown in FIG. 6, a cutout portion 66 that is long in the longitudinal direction is formed in a part of the first carriage 60. The notch 66 is formed in a rectangular shape in a plan view formed from the front part closer to one side toward the rear. Further, a small notch 67 extending toward the side (left side) is continuously formed at the front end of the notch 66.

  The first cart 60 includes a pressed member 68 that is used to press it forward. The pressed member 68 is in the center in the left-right direction of the rear end portion of the upper surface 60 b of the first carriage 60, and has a base 69 fixed to the upper surface 60 b of the first carriage 60, and upward from the rear end of the base 69. It is integrally formed from the pressed plate 70 extended toward the surface. A pair of nut members 71 are attached to the pressed plate 70 so as to protrude rearward from each other while being spaced apart in the left-right direction.

  The drive motor unit 61 includes a cylindrical body 72, fixing means 73 that fixes the body 72 to the first carriage 60, a protrusion 74 disposed at the tip of the body 72, and a non-extension extended from the protrusion 74. A rotating shaft member 75.

  The body 72 is formed in a columnar shape, and a drive motor (not shown) is housed therein. The body 72 is inserted into the notch 66 with the drive shaft center 72a of the drive motor extending along the front-rear direction.

  The fixing means 73 includes a buffer body 76 that buffers vibrations caused by driving of the drive motor unit 61 and the like, and an attachment belt 77. The buffer body 76 is formed of an annular (cylindrical) synthetic rubber, and is attached to the body 72 so as to externally fit the entire body 72 in the circumferential direction (around the drive shaft of the drive motor). The buffer bodies 76 are provided as a pair spaced apart in the front-rear direction of the body 72.

  The attachment belt 77 is provided for each shock absorber 76 and attaches the body 72 to the first carriage 60 via the shock absorber 76. Each attachment belt 77 is composed of an upper outer fitting portion 78 for fixing each buffer body 76 at the upper half and a lower outer fitting portion 79 for fixing at the lower half. The upper outer fitting portion 78 includes an arc-shaped portion 80 that externally fits the buffer body 76 in the upper half, and a fixed portion 81 that is fixed to the upper surface 60 b of the first carriage 60 and is integrally formed on the left and right sides of the arc-shaped portion 80. It consists of and. The lower outer fitting portion 79 is used symmetrically with the upper outer fitting portion 78, and has an arcuate portion 80 that externally fits the buffer body 76 in the lower half, and is fixed to the lower surface of the first carriage 60, and the left and right sides of the arcuate portion 80. It is comprised from the fixing | fixed part 81 integrally formed in both sides.

  The fixing portions 81 of the upper outer fitting portion 78 and the lower outer fitting portion 79 are firmly fixed to the first cart 60 with bolts 82 that penetrate the plate surface of the first cart 60. With this configuration, the attachment belt 77 is wound around the shock absorber 76 so as to compress the shock absorber 76 against its elasticity, and the body 72 is held by the first carriage 60. The body 72 is disposed on the left and right facing surfaces with a predetermined clearance 83 when the buffer body 76 contacts the left and right facing surfaces of the notch 66.

  The projecting portion 74 is provided at the distal end portion of the body 72 and is disposed so as to project forward from the notch portion 66. The projecting portion 74 includes a bevel gear mechanism (not shown). A rotating shaft 84 (corresponding to a support shaft of the cutting blade 62) connected to the drive shaft via the bevel gear mechanism or the like protrudes horizontally toward the other side.

  That is, the rotary shaft 84 is cantilevered at the base end side on the body 72 side, and the driving force of the drive motor is transmitted from the drive shaft to the rotary shaft 84, thereby extending along the front-rear direction (groove). The driving force around the axis 72a (along the forming direction) is converted into the driving force around the axis 84a along the left-right direction (along the back surface 5 which is the groove forming surface perpendicular to the groove forming direction). The shaft member 75, which has a larger diameter than the rotation shaft 84, is fitted and fixed to the rotation shaft 84. The shaft member 75 is positioned further forward with respect to the front surface 60 c of the first carriage 60.

  The cutting blade 62 has a thickness corresponding to the width of the groove 7 to be formed. As shown in FIG. 7, the cutting blade 62 has a disk portion 85 and a plurality of cutting edges 62 formed on the outer peripheral portion of the disc portion 85 so as to protrude further radially outward from the outer peripheral portion at predetermined intervals in the circumferential direction. The blade portion 86 is integrally formed. The cutting blade 62 is fitted and fixed with its center of rotation close to the tip of the shaft member 75. That is, the cutting blade 62 is indirectly connected to the drive shaft through the rotating shaft 84 and the shaft member 75.

  The rotation shaft 84 as a support shaft that is the rotation center of the cutting blade 62 is arranged to be higher than the wheel shaft that is the rotation center of the front caster 65A. Further, the rotation shaft 84 is arranged forward with respect to the wheel shaft of the front caster 65A, so that at least the outer peripheral upper end of the cutting blade 62 is positioned forward of the caster 65A (FIG. 7). reference).

  Further, the cutting blade 62 is attached to the distal end portion of the shaft member 75, so that the cutting blade 62 is displaced to the left with respect to the center of the first cart 60 in the left-right direction. However, when the groove forming portion 12 is mounted on the rail body 10, the cutting blade 62 is positioned substantially at the center in the left-right direction of the rail body 10, and the outer peripheral portion 87 of the cutting blade 62 protrudes upward from the cutting blade protruding space 19. (See FIG. 8). The protruding amount of the cutting blade 62 from the cutting blade protruding space 19 substantially matches the depth of the groove 7 to be formed. And the depth of the groove | channel 7 is the depth which does not contact the reinforcing bar in a concrete structure, and the state which approaches a reinforcing bar as much as possible is preferable.

  The diameter of the cutting blade 62, the position of the rotary shaft 84, and the position of the small notch 67 are set so that the outer peripheral portion 87 including the blade portion 86 of the cutting blade 62 enters the small notch 67. Further, the cutting blade 62 having a diameter larger than the thickness (vertical height) of the drive motor unit 61 is used. That is, the upper end portion of the outer peripheral portion 87 of the cutting blade 62 is positioned higher than the upper end portion of the drive motor portion 61, and the lower end portion of the outer peripheral portion 87 of the cutting blade 62 is positioned lower than the casters 65A and 65B. It is set to be.

  As described above, the support shaft holding member 63 is for holding the rotating shaft 84 that is cantilevered. In other words, the support shaft holding member 63 is for holding the rotating shaft 84 that is a support shaft of the cutting blade 62 via the shaft member 75.

  As shown in FIGS. 7 and 9, the support shaft holding member 63 is formed in a single plate shape and is arranged so as to be aligned with the cutting blade 62 in the axial direction of the rotation shaft 84. Specifically, the support shaft holding member 63 is formed in a rectangular shape whose longitudinal direction is the front-rear direction when viewed from the side, the front side as one end side in the longitudinal direction holds the rotating shaft 84, and the other end The rear side as the side is configured to be fixed to the first carriage 60. Further, the upper surface on the front side of the support shaft holding member 63 is formed as an inclined surface 88 that is inclined downward toward the front with respect to the horizontal direction. The rear side of the inclined surface 88 is formed on a surface parallel to the upper surface 60 b of the first carriage 60, and the lower surface of the support shaft holding member 63 is also formed on a surface parallel to the upper surface 60 b of the first carriage 60.

  The support shaft holding member 63 is dimensioned so that it does not protrude upward with respect to the upper end portion of the outer peripheral portion 87 of the cutting blade 62 and does not protrude downward with respect to the lower end portion of the outer peripheral portion 87 of the cutting blade 62. ing. However, the support shaft holding member 63 is set so as to protrude further forward with respect to the front end portion of the outer peripheral portion 87 of the cutting blade 62. In other words, the front end portion as the front end portion of the support shaft holding member 63 protrudes further forward than the cutting blade 62. The front end surface 63a of the front end portion protruding forward is a plane along the vertical direction when the first carriage 60 is leveled, and the front end surface 63a is a surface that can contact the connecting body 18 from the rear. is there.

  A first holding hole 89 is formed on the plate surface of the support shaft holding member 63. The front portion of the first holding hole 89 is formed in an arc shape, and the rear portion is formed in a rectangular shape. The diameter of the front portion substantially matches the diameter of the shaft member 75. Further, a second holding hole 90 that is continuous with the first holding hole 89 is formed in the middle portion of the rear portion of the support shaft holding member 63 in the vertical direction. The second holding hole 90 extends from the first holding hole 89 to the rear end surface of the support shaft holding member 63. Further, the support shaft holding member 63 is disposed along an upper and lower direction orthogonal to the first carriage 60, and a part of the support shaft holding member 63 is provided so as to protrude forward from the first carriage 60. Yes.

  In such a support shaft holding member 63, the shaft member 75 and the rotation shaft 84 are fitted inside the front portion of the first holding hole 89 to hold the shaft member 75 and the rotation shaft 84. The part 601 is inserted into the second holding hole 90, and the front part 601 and the plate surface portion of the second holding hole 90 formation region are welded or the like and firmly fixed to the first carriage 60.

  The duct portion 64 is disposed on the back surface of the first carriage 60, and includes a duct 91 fixed to the back surface at a position immediately behind the cutting blade 62, and a dust suction hose 92 connected to the duct 91. ing. The duct 91 is disposed and fixed on the back surface of the first carriage 60 so that the cutting blade 62 side is open, and the dust suction hose 92 is connected to the rear end portion of the duct 91. A suction device (not shown) is detachably connected to the dust suction hose 92.

  The groove forming part 12 having the above-described configuration has an overall vertical height excluding the cutting blade 62 from the guide surfaces 40a, 41a of the lower walls 40, 41 of the guide rails 15A, 15B to the lower surfaces of the upper walls 38, 39. It is set to be smaller than the height. In other words, the groove forming portion 12 is a groove forming portion formed by the body portion 14 below the top plate portion 13 with the cutting blade 62 protruding upward from the cutting blade protruding space 19 of the top plate portion 13. It is accommodated in the accommodation space and held by the guide rails 15A and 15B. Thus, when the groove forming portion 12 is mounted on the rail body 10 so that the casters 65A and 65B are placed on the guide surfaces 40a and 41a, the lower surface of the upper walls 38 and 39 and the groove forming portion 12 (the pressed plate 70) ) Between them.

  The above is the cutting device 1 for forming the groove 7 on the back surface 5 of the bridge girder 4 which is the groove forming surface. Next, a procedure for installing (embedding) the anode 95 on the back surface 5 of the bridge girder 4 using the cutting apparatus 1 having the above-described configuration, that is, a procedure for carrying out the cathodic protection method on the bridge girder 4 will be described. First, a groove forming procedure for forming the groove 7 using the cutting device 1 will be described. In forming the groove, the first carriage 60 and the groove forming part 12 are used in combination.

First, the outline of the procedure for forming the groove is as follows (1) to (8).
(1) On the back surface 5 of the bridge girder 4, marking for clearly indicating a site where the groove 7 is formed is applied.
(2) A pre-excavation (for example, a groove shape having a predetermined length in the front-rear direction) 4a that is a trigger for the groove 7 to be formed is formed in a portion that is rearwardly removed from the top end surface 3 of the abutment 2.
(3) The rail body 10 is inserted into the space 6 between the top end surface 3 of the abutment 2 and the back surface 5 of the bridge girder 4 facing each other. Further, the groove forming portion 12 is placed (inserted) along the rear end side of the rail body 10.
(4) The rail body 10 is moved in the front-rear direction and the left-right direction of the space 6 so that the cutting blade 62 substantially matches the pre-drilling 4a.
(5) The jack is extended to lift the rail body 10, and the top surface 20 of the top plate portion 13 as a contact portion of the rail body 10 is pressed against the back surface 5 of the bridge girder 4.
(6) The drive motor unit 61 is driven to rotate the cutting blade 62, and the groove forming unit 12 is moved forward along the rail body 10.
(7) Further, the groove forming portion 12 is moved forward along the rail body 10.
(8) When the groove forming part 12 is moved to the innermost part (front end part) of the rail body 10 and the length in the front-rear direction of the groove 7 is still required, the jack is shrunk so that the upper surface 20 of the rail body 10 is bridged. 4 is separated from the back surface 5 of the No. 4, and the rail body 10 is further moved forward to carry out (5) to (7).
That's it.

  Next, the steps (1) to (8) will be described in detail in order. First, the step (1) will be described. The position to be marked is preferably given at a predetermined interval in the width direction of the bridge girder 4 at a required position based on the arrangement of the reinforcing bars to which the anticorrosion method is applied by knowing in advance the position of the reinforcing bar embedded in the bridge girder 4 .

  Next, the step (2) will be described. A pre-drilling 4a is formed at the marking position by, for example, a concrete cutter (see FIG. 10). In FIG. 10, a support member such as a hinge that supports the bridge girder 4 with respect to the top end surface 3 of the abutment 2 is omitted. As this preliminary excavation 4a, for example, a groove having a predetermined length formed in the front-rear direction so that the front end portion is continuous with the marking can be considered.

  The pre-dig 4a is preferably formed in advance according to the number of grooves 7 to be formed. Moreover, as a formation area of the pre-drilling 4a, from the site | part which remove | deviated from the site | part (site | part which forms the space 6) facing the top end surface 3 of the abutment 2 of the back surface 5 of the bridge girder 4, It is preferable to extend the rear end (about the rear entrance). The reason for forming the pre-dig 4a is to secure the biting of the cutting blade 62 with respect to the back surface 5 (an opportunity to start cutting).

  The process (3) will be described. The operator inserts the rail body 10 from the rear to the front at a desired position in the space 6 so that the top plate portion 13 of the rail body 10 is on the upper side and the guide rails 15A and 15B are on the lower side. (See FIG. 11). At this time, if the jack is contracted, the height of the cutting device 1 as a whole is low. Therefore, even if the space space 6 is narrow, the rail body 10 can be easily inserted into the space space 6. it can.

  When the rail body 10 is inserted into the space 6, the lower portions 50 and 51 of the jack are placed on the top end surface 3 of the abutment 2. At this time, the rail body 10 is not inserted into the space 6 in all the regions in the front-rear direction, and the rear end portion of the rail body 10 protrudes rearward from the space 6.

  Subsequently, the operator places the groove forming portion 12 in the rear of the rail body 10 so that the casters 65A and 65B are placed on the guide surfaces 40a and 41a of the lower walls 40 and 41 of the guide rails 15A and 15B. (That is, the groove forming portion 12 is accommodated in the groove forming portion accommodating space of the rail body 10 from the rear) (see FIG. 12). At this time, the rail body 10 is not inserted into the space space 6 in all the regions in the front-rear direction, and the rear end portion of the rail body 10 protrudes rearward from the space space 6. The groove forming portion 12 can be easily attached.

  When the groove forming portion 12 is inserted into the rail body 10 as described above, the portion of the outer peripheral portion 87 of the cutting blade 62 located on the upper side is separated from the cutting blade protruding space 19 by the top of the rail body 10. It will be in the state protruded upwards with respect to the upper surface 20 of the board part 13. FIG. Further, the side end surfaces 60a, 60a of the first carriage 60 face the inner surfaces 42a, 43a of the vertical walls 42, 43 of the guide rails 15A, 15B slightly spaced apart so as to be loosely fitted.

  When the insertion of the groove forming portion 12 into the rail body 10 is completed, the rail interval holding member 30 is attached to the groove forming portion 12. In this case, as described above, mounting rails are inserted into the rear holes 30a and 30b from the rear and screwed into the mounting front holes 31a and 32a, so that the rail interval holding member 30 is attached to the mounting plate members 31 and 32. Can be installed to deliver.

  The process (4) will be described. The operator can move the rail body 10 in the front-rear direction and the left-right direction in the space 6 so that the cutting blade 62 of the groove forming portion 12 inserted into the rail body 10 substantially matches the preliminary excavation 4a formed in the step (2). Move with the direction position in mind. When this positioning is completed, the process proceeds to step (5).

  That is, in the step (5), the operation members 52 and 53 of the jack as the pressing means are rotated using an operation tool (not shown) such as an electric tool. Then, since the lower portions 50 and 51 of the jack are placed on the top end surface 3 of the abutment 2, the jack extends upward, and the groove forming portion 12 is mounted by the lifting force (pushing force). The rail body 10 itself rises toward the back surface 5 of the bridge girder 4 (see FIG. 13). That is, due to the extension of the jack, the rail body 10 moves to the back surface 5 side of the bridge girder 4, and the groove forming portion 12 held by the rail body 10 also moves to the back surface 5 side of the bridge girder 4 with this movement. The height position at which the rail body 10 is fully raised is specified as the position at which the upper surface 20 of the top plate portion 13 of the rail body 10 is pressed against the back surface 5 of the bridge girder 4. And the outer peripheral part 87 which protruded upwards from the cutting blade protrusion space 19 of the cutting blade 62 enters the pre-dig 4a and is pressed against it.

  The process (6) will be described. When the operator electrically drives the drive motor unit 61, the driving force of the drive motor is transmitted to the rotary shaft 84 via the drive shaft, and the cutting blade 62 and the rotary shaft 84 have an axial center 84 a along the left-right direction. Rotate around. In this case, the cutting blade 62 rotates clockwise in FIG. Then, the rail body 10 is moved forward along the groove forming portion 12. At this time, the hook-shaped pressing tool or the like is prepared, and the groove forming portion 12 is pressed forward using this. Alternatively, it may be pushed electrically by using a separate drive mechanism.

  In this embodiment, the first cart 60 includes a pressed member 68, and the pressed plate 70 includes a pair of nut members 71 spaced apart in the left-right direction. It is preferable to attach and press the tip of the pressing tool to the nut member 71. This pressing tool is inserted into the insertion notch 30c of the rail interval holding member 30 from behind. And the formation of the groove | channel 7 starts by pressing the groove | channel formation part 12 ahead with a pressing tool.

  By the way, as described above, in the state where the first carriage 60 of the groove forming portion 12 is moved horizontally, the rotation center axis of the pair of left and right casters 65A on the front side is the rotation center of the pair of left and right casters 65B on the rear side. The casters 65A and 65B are positioned below the shaft and have the same diameter. According to this configuration, when the groove forming portion 12 is inserted into the rail body 10 from the rear and both the front and rear casters 65A and 65B are placed on the guide surfaces 40a and 41a, the first carriage 60 is caster 65A and 65B. The front portion is inclined upward (the rear portion is inclined downward) by the height difference. When the operator presses the groove forming portion 12 forward, the rear caster 65B presses so as not to separate from the guide surfaces 40a and 41b, so that the cutting blade 62 moves upward with the front caster 65A as a fulcrum. The state of being pushed by (the back surface 5 side of the bridge girder 4) is maintained. By pressing the first carriage 60 while maintaining this state, the depth of the groove 7 can be secured constant.

  In addition, the force which presses the groove | channel formation part 12 ahead needs to resist the hardness of concrete so that the cutting blade 62 can cut the surface part of concrete by the rotation. If it is easier to perform the work without mounting the rail interval holding member 30 at the start of the groove 7 forming operation, the rail forming portion 12 is pushed by the operator's own hand without mounting the rail interval holding member 30. It is also possible to do so. The rail spacing member 30 can be used after the grooves 7 are formed to a certain length.

  The step (7) will be described. Furthermore, the groove | channel 7 along the front-back direction is formed in the back surface 5 by moving the groove formation part 12 along the rail body 10 ahead. The groove forming portion 12 can be moved until the front end face 63a of the support shaft holding member 63 contacts the connecting body 18 (see FIG. 14). Further, since the groove forming portion 12 does not move further forward when the front end surface 63a of the support shaft holding member 63 abuts on the connecting body 18, the cutting blade 62 does not hit the connecting body 18, and therefore the cutting blade 62 Can be prevented from being damaged. Further, since the front end surface 63a of the support shaft holding member 63 is in contact with the connecting body 18, it is possible to avoid a situation in which the groove forming portion 12 is unexpectedly detached from the front end portion of the rail body 10, and safety is ensured. Can be secured.

  By the way, as described above, the force that presses the groove forming portion 12 forward needs to resist the hardness of the concrete so that the cutting blade 62 can cut the surface portion of the concrete by its rotation. Therefore, a load (external force) corresponding to the cutting of concrete acts on the cutting blade 62. Since the rotary shaft 84 is cantilevered, the external force becomes a large moment around the fulcrum (around the axis of the drive shaft), vibrations associated with concrete cutting, etc. There is a risk of blurring.

  However, since the rotation shaft 84 as a support shaft of the cutting blade 62 is held by the support shaft holding member 63 fixed to the first carriage 60, the external force as described above is applied to the rotation shaft 84 via the cutting blade 62. Even if it works, the rotation behavior of the cutting blade 62 can be stabilized by suppressing the shake of the rotating shaft 84. Therefore, it is possible to ensure the forming accuracy of the groove 7 formed from the side surface facing the groove bottom surface corresponding to the cross-sectional shape of the outer peripheral portion 87 of the cutting blade 62.

  Further, the side end surfaces 60a, 60a on both the left and right sides of the first carriage 60 are surfaces that can come into contact with the inner surfaces 42a, 43a of the vertical walls 42, 43 of the guide rails 15A, 15B, and the vertical walls 42 of the guide rails 15A, 15B. , 43 are surfaces which can loosely restrict the displacement of the first carriage 60 in the left-right direction. For this reason, the inner surfaces 42a and 43a serve as side guide surfaces in the forward movement along the guide rails 15A and 15B of the first carriage 60, so that both end portions of the first carriage 60 are forward (groove forming direction). It can guide smoothly towards. Accordingly, in the rail body 10, the first carriage 60 can be guided in a state where the first carriage 60 is reliably aligned in the front-rear direction, so the groove 7 can also be formed linearly along the front-rear direction, and the molding accuracy of the groove 7 can be increased. Can be secured.

  In addition, there is a connecting body 18 at the front end portion of the rail body 10, and the position is reliably held so that the positional relationship between the guide rails 15A and 15B is not displaced. However, the rear end portions of the guide rails 15A and 15B are For the convenience of inserting the groove forming portion 12, a member having a function such as the connecting body 18 cannot be provided in advance. For this reason, the rail interval holding member 30 shown in FIG. 5 is fixed by passing the groove forming portion 12 into the rail body 10 and then passing it to the mounting plate members 31 and 32, so that the guide rail 15A is formed at the time of groove formation. 15B, even if an external force that separates the rear end portions of the guide rails 15A and 15B in the left-right direction is applied, the separation distance between the rear end portions of the guide rails 15A and 15B due to the holding force of the rail interval holding member 30 Can be held.

  Therefore, the guide surfaces 40a and 41a of the guide rails 15A and 15B also have their front end side held by the connecting body 18 and their rear end side held by the rail interval holding member 30, so that the separation distance changes unexpectedly as a whole. Therefore, the groove forming portion 12 can be moved without shifting in the left-right direction, and the groove forming accuracy can be ensured.

  By the way, aggregates having different particle sizes are blended in the concrete structure. For this reason, when the outer peripheral portion of the cutting blade 62 hits an aggregate having a large particle size, even if the cutting blade 62 rotates, the aggregate having a large particle size cannot be cut, and a large load may be applied to the cutting blade 62. Conceivable. However, as described above, the rotating shaft 84 of the cutting blade 62 is disposed at a higher position than the wheel shaft of the front caster 65A, and the rotating shaft 84 is disposed in front of the wheel shaft of the front caster 65A. As a result, at least the outer peripheral upper end portion (the portion applied to the concrete) of the cutting blade 62 is positioned in front of the casters 65A, and the lower surfaces of the upper walls 38 and 39 and the groove forming portion 12 (pressed plate) 70) because there is a clearance between

  If a large load is applied to the cutting blade 62 due to the presence of the aggregate, the rear portion of the first carriage 60 (the rear casters 65B and 65B) is within the range corresponding to the clearance, accordingly. By moving (swinging) from the guide surfaces 40a and 41a using the front caster 65A as a fulcrum, the load on the cutting blade 62 can be absorbed, and the cutting blade 62 is excessively large. The blurring, breakage, and damage during rotation caused by the load can be suppressed, so that the forming accuracy of the groove 7 (the shape of the groove 7) can be secured, and the durability of the cutting blade 62 can be improved. .

  When the front and rear casters 65A and 65B have the same height, in order to ensure a necessary amount of clearance between the lower surfaces of the upper walls 38 and 39 and the upper end surface of the pressed plate 70, The upper walls 38 and 39 need to be positioned upward according to the amount of clearance. And if the upper walls 38 and 39 are located upwards, the rail body 10 will enlarge that much (the height of the rail body 10 will become high).

  However, in the groove forming portion 12, since the rotation center axis of the rear caster 65B is disposed above the rotation center axis of the front caster 65A, the casters 65A and 65B are placed on the guide surfaces 40a and 41a. Then, the rear portion of the first cart 60 is inclined downward by the difference in height between the casters 65A and 65B. For this reason, if the height positions of the upper walls 38 and 39 are the same, the upper walls 38 and 39 can be moved from the upper end surface of the pressed plate 70 as compared to the case where the front and rear casters 65A and 65B have the same height. A large distance to the bottom surface can be secured. That is, by setting the height of the upper walls 38 and 39 at a high position, it is possible to prevent the entire rail body 10 from becoming large and to secure the necessary clearance.

  The step (8) will be described. When the groove forming part 12 is moved to the innermost part (front end part) of the rail body 10 and the length of the groove 7 in the front-rear direction is required, the jack is once shrunk and the upper surface 20 of the rail body 10 is Separated from the back surface 5. If it does so, since the pressing force of the jack which has positioned the rail body 10 will be cancelled | released, there will be nothing which prevents the movement of the rail body 10 in the front-back direction. Therefore, the rail body 10 can be easily moved further to the back side (front), and the operator can form the longer groove 7 by performing the steps (5) to (7) again. it can.

  When the formation of the single groove 7 is completed, the cutting device 1 is moved leftward or rightward so that the cutting blade 62 matches the next marking position, and (3) to (8) or (5) Repeat steps (8) to (8). In this way, the necessary number of grooves 7 are sequentially formed.

  The above is the process for forming the groove. When the formation of the groove 7 is completed, a step of burying the anode 95 in the groove 7 is subsequently performed. In the process of embedding the anode 95, first, it is necessary to know the metal exposure such as the binding metal of the reinforcing bar in the groove 7 formed. This is because the conductive member is exposed in the groove 7, and when the conductive member comes into contact with the embedded anode 95, a short circuit occurs between the conductive member and the anode 95, so that the effect of anticorrosion cannot be obtained. Therefore, a magnet (not shown) is placed in the groove 7 that has been formed and moved along the groove 7. And the short circuit prevention process (for example, metal removal process or insulation process) is performed to the area | region where the attractive force of the magnet produced.

  As described above, after performing the short-circuit prevention treatment as necessary, as shown in FIG. 15, the groove 7 is filled with the first mortar (grouting material) 115 to a predetermined thickness. The first mortar 115 is a mixture of fine aggregate and water only in cement. At the time of filling, the depth of the groove 7 (groove bottom surface) is filled using a mortar injection tool M that can accommodate the first mortar 115 in a certain amount. Then, before the first mortar 115 is cured, the anode 95 is inserted into the groove 7 as shown in FIGS.

  Here, the anode 95 is composed of a long band-shaped metal body having a mesh, and the metal body is bent at the center in the width direction (short direction). The width of the anode 95 in the bent state is set larger than the width of the groove 7. The mesh has a rhombus shape formed during stretching when the anode 95 is processed into an expanded metal shape.

  In order to mount the anode 95 in the groove 7 filled with the first mortar 115, the cutting blade 62 is removed from the groove forming part 12 described above, and the groove forming part 12 is replaced with the electrode pressing body 99 shown in FIGS. (In FIG. 16, FIG. 17, only the electrode pressing body 99 is described). The electrode pressing body 99 is formed in a disk shape with a center hole 99a formed at the center of rotation. The outer peripheral portion 106 of the electrode pressing body 99 is formed by an inclined surface in which both sides in the thickness direction are inclined toward the center in the thickness direction so that the center portion of the blade thickness is radially outward (maximum diameter). It is the outer peripheral tip. The diameter of the electrode pressing body 99 is set slightly smaller than that of the cutting blade 62.

  With the anode 95 inserted into the groove 7 in a certain length from the rear to the front with the bent portion facing upward, the operations shown in the above (3) to (5) are performed. Then, the operation shown in (7) is performed. Then, the outer peripheral tip of the electrode pressing body 99 is inserted into the bent portion of the anode 95, and the anode 95 is sequentially pressed upward (in the groove bottom side) in the longitudinal direction. Since the first mortar 115 contains only fine aggregate, the first mortar 115 enters between the rhombic meshes of the anode 95 and is larger than the holding force of the first mortar 115 and the width of the groove 7. The anode 95 can be held without dropping from the groove 7 due to the lateral elastic force of the anode 95 itself by inserting the anode 95 having a width into the groove 7.

  Such an operation is performed on each groove 7 and then, as shown in FIG. 18, the second mortar 116 is filled in the unfilled space of the groove 7 in the same manner as the filling of the first mortar 115. . The second mortar 116 may be a mortar using a coarser aggregate than the aggregate blended in the first mortar 115 or the same mortar as the first mortar 115.

  In addition, as the anode installation work, all the grooves 7 are formed in advance, and the filling of the first mortar 115, the installation of the anode 95, and the filling of the second mortar 116 are sequentially performed for each groove 7. Each time the groove 7 is formed, the first mortar 115 may be filled, the anode 95 may be installed, and the second mortar 116 may be filled. The anodes 95 may be sequentially installed in the grooves 7, and then the second mortar 116 may be sequentially filled in all the grooves 7. The selection of the procedure can be arbitrarily selected according to the work environment.

  As described above, the cutting apparatus 1 according to the embodiment of the present invention raises the rail body 10 using the jacks 11A and 11B as pressing means, and the upper surface 20 of the top plate portion 13 of the rail body 10 with the pressing force. Is pressed against the back surface 5 of the bridge girder 4 as a groove forming surface, the rail body 10 is positioned and fixed, and the cutting blade 62 can be pressed (pressed) against the groove forming surface by the pressing force. As described above, according to the configuration in which the pressing means 11A and 11B are used together without separately providing the means for fixing the rail body 10 and the means for pressing the cutting blade 62 against the groove forming surface, only that much. The configuration of the cutting device 1 can be simplified and the size can be reduced.

  Further, the cutting device 1 exposes only the outer peripheral portion 87 of the cutting blade 62 of the groove forming portion 12 from the rail body 10 and stores the other portion in the rail body 10 (groove forming portion receiving space). Therefore, it is possible to suppress the height of the entire cutting apparatus 1 from being increased by that much, and it can be used extremely effectively in a narrow space with a low height.

  Therefore, in a narrow space where an operator cannot enter, such as a space 6 formed by the top end surface 3 of the abutment 2 and the back surface 5 of the bridge girder 4, the reinforcing bars arranged inside the concrete structure In order to prevent corrosion, the groove 7 in which the anode 95 is embedded is formed on the back surface 5. For example, the top end surface 3 of the abutment 2 is not required to be hung to secure a work space. The groove 7 can be formed while maintaining the shape. Thus, according to the fact that the operator can omit the lifting work, the construction of the groove formation becomes extremely easy.

  By the way, in the said embodiment, when forming the groove | channel 7 using the cutting device 1 and attaching the anode 95 to the groove | channel 7, the case where the groove | channel formation part 12 was utilized was demonstrated. However, when the groove 7 is formed using the cutting device 1 and the anode 95 is attached to the groove 7, an electrode installation device that is a unique device may be used. Here, based on FIGS. 19-22, the electrode installation apparatus 96 for installing the anode 95 in the groove | channel 7 is demonstrated. The electrode installation device 96 includes the rail body 10 already described and an electrode installation portion 97 that can move in the front-rear direction along the rail body 10. Since the structure of the rail body 10 is as described above, the description thereof will be omitted, and the electrode installation portion 97 will be described below.

  The illustrated electrode installation portion 97 includes a carriage (hereinafter referred to as “second carriage”) 98 and an electrode pressing body 99. The second carriage 98 is guided along the rail body 10 in the groove forming direction. Specifically, the second carriage 98 is guided for electrode installation that can move in the front-rear direction along the guide surfaces 40a and 41a of the guide rails 15A and 15B. The left and right widths of the body are set equal to those of the first carriage 60. The second carriage 98 is formed between a pair of left and right caster (wheel) attachment region 101 to which the caster 100 (wheel) is attached, and the caster (wheel) attachment region 101, and the electrode pressing body 99 is installed. It is formed from a plate member having a region portion 102. The plate member constituting the second carriage 98 is formed in a shape in which unnecessary portions are omitted in consideration of weight balance at the left and right side portions with respect to the center in the left-right direction and weight reduction. In particular, a specific region 105 between the electrode support wall 103 and the pressing wall 104 described later is cut away.

  The electrode support wall 103 is erected at the front end (front end) of the second carriage 98. The electrode support wall 103 is formed so as to rise upward at the front end portion of the front projecting portion of the installation region portion 102, and an insertion hole 103a for allowing the anode 95 to pass in the front-rear direction is formed at the center in the left-right direction. ing. In addition, the electrode support wall 103 is set to a width that is considerably smaller than the left and right width of the second carriage 98, and is disposed so as to be shifted to the other side with respect to the left and right width center of the second carriage 98. Therefore, the insertion hole 103a is also displaced from the center of the left and right width of the second carriage 98 on the other side. The amount of positional deviation of the insertion hole 103a from the center in the left-right direction of the second carriage 98 is equal to the amount of positional deviation of the cutting blade 62 in the cutting device 1.

  At the rear end portion of the second carriage 98, the pressing wall 104 for pressing the second carriage 98 from the rear to the front is provided upright. The pressing wall 104 is set to have the same width as the left and right width of the second carriage 98, and the vertical height is set lower than the vertical height of the installation region portion 102. Further, the pressing wall 104 is formed with an attachment hole 104a for attaching a distal end portion of a pressing rod member (not shown). The position of the mounting hole 104a in the left-right direction is shifted to the other side with respect to the center of the left-right width of the second carriage 98, and the amount of position shift is the amount of position shift of the insertion hole 103a in the installation region portion 102. Is the same. Therefore, the mounting hole 104a and the insertion hole 103a are in the same position in the left-right direction. However, the mounting hole 104a is formed at a lower position in the vertical direction than the insertion hole 103a.

  The electrode pressing body 99 has the same configuration as that described with reference to FIGS. 16 and 17. That is, with reference to these drawings, the electrode pressing body 99 is formed in a disk shape in which a central hole 99a is formed at the center of rotation. An internal thread is formed on the peripheral surface of the center hole 99a. The outer peripheral portion 106 of the electrode pressing body 99 is formed by an inclined surface in which both sides in the thickness direction are inclined toward the center in the thickness direction so that the center portion of the blade thickness is the outermost in the radial direction (maximum diameter). It is the outer peripheral tip.

  As shown in FIGS. 21 and 22, the electrode pressing body 99 is disposed between the electrode support wall 103 and the pressing wall 104, and a substantially lower half thereof is a notch between the electrode support wall 103 and the pressing wall 104. It is attached to the second carriage 98 via the support means 107 so as to protrude downward from the specified area 105. The electrode pressing body 99 is supported by the support means 107 at a position displaced from the center in the left-right direction of the second carriage 98 so that the center in the thickness direction coincides with the position in the left-right direction of the insertion hole 103a. . The height position of the upper end portion of the electrode pressing body 99 is set to be higher than the insertion hole 103a.

  The support means 107 includes a support piece 108 erected on the upper surface of the second carriage 98 so as to be flush with the end face of the specific region 105 notched between the electrode support wall 103 and the pressing wall 104, and the support piece 108. Is formed of a support shaft body 109 penetrating in the left-right direction and a bush 110 that externally fits one end portion of the support shaft body 109.

  The shaft body 109 has an axial center extending in the left-right direction, a male screw 109a is formed on the other side, and is secured from the support piece 108 by a snap ring 112. The electrode pressing body 99 is attached to the support shaft body 109 by the center hole 99a being screwed into the male screw. An annular buffer member 113 is interposed between the electrode pressing body 99 and the support piece 108.

  The casters (wheels) 100 protrude downward from the back surface of the second carriage 98, are provided in the left and right caster (wheel) attachment region portions 101, and are arranged in pairs in the left-right direction. These casters 100 are disposed on the back surface of the second carriage at the same position in the front-rear direction.

  The electrode installation portion 97 having such a configuration is used by being mounted on the rail body 10. The electrode installation portion 97 is a groove forming portion accommodation space formed by the body portion 14 below the top plate portion 13 in a state where the electrode pressing body 99 protrudes upward from the cutting blade protruding space 19 of the top plate portion 13. (In this case, it is accommodated in the electrode installation portion accommodating space) and is held by the guide rails 15A and 15B. Specifically, the electrode installation portion 97 is mounted by inserting the caster 100 between the guide rails 15A and 15B so that the caster 100 is placed on the guide surfaces 40a and 41a of the guide rails 15A and 15B.

  When the anode 95 is installed in the groove 7 using the electrode installation portion 97, the groove 7 has already been formed. Therefore, the rail body 10 is inserted into the space 6 in advance and the top end surface 3 of the abutment 2 and the bridge beam 4 are You may install in general between the back surfaces 5. However, since it is necessary to align the electrode pressing body 99 of the electrode installation portion 97 with the groove 7, fine adjustment in the left-right direction of the rail body 10 after the electrode installation portion 97 is mounted on the rail body 10 is appropriately performed. is necessary.

  When the electrode installation portion 97 is attached to the rail body 10, as shown in FIG. 22, the anode 95 is inserted through the insertion hole 103a of the electrode support wall 103 from the front to the rear in advance, The upper end of the body 99 is retracted (introduced). The anode 95 is held so that the outer peripheral tip of the electrode pressing body 99 is inserted into the bent portion. Then, when the electrode pressing body 99 is aligned with the groove 7 and the jack is extended so that the upper surface 20 of the top plate portion 13 is pressed against the back surface 5 of the bridge girder 4, the upper end of the electrode pressing body 99 is extended (pushing up). Enters the groove 7, and the rear end of the anode 95 at the upper end of the electrode pressing body 99 is pushed into the starting point of the mounting of the anode 95 in the groove 7. Push forward along 10.

  At this time, the operator may directly press the electrode installation part 97, but the electrode installation part 97 is attached by attaching the tip of the pressing rod member to the mounting hole 104a of the pressing wall 104 and pressing the pressing rod member. Can be pushed in easily. As the electrode installation portion 97 is pushed in, the anode 95 is pressed to the back side (first mortar 115) of the groove 7, and is held (held) between the first mortar 115 and the tip of the outer periphery of the electrode pressing body 99. Thus, the electrode pressing body 99 is rotated around the support shaft body 109 by the clamping force, and the anode 95 is sequentially drawn from the insertion hole 103 a as the support shaft body 109 rotates, and the anode 95 is sequentially mounted in the groove 7. .

  When the mounting of the anode 95 for one groove 7 is completed, the rail body 10 is moved so as to align the electrode pressing body 99 with the next groove 7 filled with the first mortar 115 in advance. Through the above operation, the anode 95 is installed for each groove 7. Then, after the installation of the anode 95 in the groove 7 is completed, the second mortar 116 is filled in the groove 7 and the electrode installation work is completed.

  In the operation of using the rail body 10 and installing the anode 95 in the groove 7 using the electrode installation portion 97, it is not necessary for the operator to install the anode 95 by inserting an arm into the narrow portion in the narrow portion. 95 can be installed very easily and efficiently.

  Thus, the electrode installation part 97 is movable in the groove 7 along the second carriage 98, and the second carriage in a state of being rotatable about the axis along the back surface 5 that is perpendicular to the groove forming direction and is the groove forming surface. A disk-shaped electrode pressing body 99 attached to 98 and an electrode support wall 103 as a guide portion for introducing and guiding the anode 95 to the outer peripheral portion of the electrode pressing body 99 are provided. Then, by moving the second carriage 98 in the groove forming direction, the outer peripheral portion of the electrode pressing body 99 moves the anode 95 aligned with the groove 7 as the second carriage 98 moves in the groove forming direction. The anode 95 can be installed in the groove 7 while pressing toward the groove bottom side.

  In the above embodiment, the groove 7 for installing the anode 95 is formed in the back surface 5 of the bridge girder 4 in the narrow space 6 formed by the relationship between the top end surface 3 of the abutment 2 and the back surface 5 of the bridge girder 4. Explained. However, in addition to the abutment 2, the groove 7 is formed on the back surface 5 of the bridge girder 4 in the narrow space 6 formed by the relationship between the top end surface of the pier supporting the bridge girder 4 and the back surface 5 of the bridge girder 4. Even if it exists, the cutting device 1 can be used similarly to the said embodiment. In this case, as long as the setting in the front-rear direction is along the axial center of the bridge girder 4, any girder end of both girder ends may be the front. In addition to the abutment 2, the electrode installation device 96 also has a groove formed in the back surface 5 of the bridge girder 4 in a narrow space 6 formed by the relationship between the top end surface of the pier on which the bridge girder 4 is supported and the back surface 5 of the bridge girder 4. 7 can be used in the same manner as in the above embodiment.

  In the said embodiment, it demonstrated by the case where the groove | channel 7 was formed in the back surface 5 of the bridge girder 4. FIG. However, the cutting device 1 can also form the grooves 7 in the top end surface 3 of the abutment 2 in a narrow space 6. In this case, the rail body 10 and the groove forming portion 12 are used so as to be reversed upside down, and the lower portions 50 and 51 of the pressing means 11A and 11B are pressed against the back surface 5 of the bridge girder 4 to 20 is pressed against the top end surface 3 of the abutment 2, and the rail body 10 is mounted in the space 6. The electrode installation device 96 also uses the rail body 10 and the electrode installation portion 97 so as to be turned upside down, so that the anode 95 is installed in the groove 7 formed in the top end surface 3 of the abutment 2 in the narrow space 6. Can do.

  In the said embodiment, the cutting device 1 demonstrated by the case where it uses in a narrow part. However, the cutting device 1 is not limited to being used only for the space 6 in the narrow portion, and if the cutting device 1 can be fixed between the vertically opposed surfaces, the facing surface is not limited to the narrow portion. A groove 7 can be formed in the groove. Further, it can be used to form the groove 7 on the surface facing in the horizontal direction (horizontal direction) or the vertical direction in the space space 6 in the narrow portion or in the space space 6 that is not the narrow portion.

  The electrode installation device 96 is the same, and is not limited to the case where the electrode installation device 96 is used only in the space 6 in the narrow portion, and if the electrode installation device 96 can be fixed between the vertically opposed surfaces, An anode 95 can be installed in the groove 7 formed on the facing surface. It is also possible to install the anode 95 in the groove 7 formed on the surface facing in the horizontal direction (horizontal direction) or the vertical direction in the space space 6 in the narrow portion or in the space space 6 not in the narrow portion.

  In the said embodiment, when inserting the rail body 10 in the space space 6, it mounted directly on one surface (for example, top end surface 3) of the opposing surfaces. However, for example, a wheel (not shown) may be attached to the lower portion of the rail body 10, and the rail body 10 may be guided by the wheel when the rail body 10 is inserted into the space 6. Although the installation location of the wheel is not particularly limited, it is preferable that the protruding amount of the wheel with respect to the rail body 10 is as small as possible from the viewpoint of making the rail body 10 compact, and the wheel is attached to the lower part of the rail body 10. As a result, the rail body 10 can be smoothly and easily inserted into the space 6.

  In the above embodiment, the cutting apparatus 1 has been described as an apparatus for forming a groove in the surface portion of a concrete structure. However, an electrode (anode) is installed on the surface portion of a structure made of wood or stone other than the concrete structure. The present invention can also be applied to the case of forming a groove other than the purpose.

  DESCRIPTION OF SYMBOLS 1 ... Cutting device, 2 ... Abutment, 3 ... Top end surface, 4 ... Bridge girder, 4a ... Pre-drilling, 5 ... Back surface, 6 ... Spatial space, 7 ... Groove, 10 ... Rail body, 11A, 11B ... Pressing means, 12 ... Groove forming portion, 13 ... top plate portion, 15A, 15B ... guide rail, 19 ... space for projecting cutting blade, 31,32 ... plate member, 40,41 ... lower wall, 40a, 41a ... guide surface, 60 ... first Cart, 60a, 60a ... side end face, 60c ... front face, 61 ... drive motor section, 62 ... cutting blade, 63a ... front end face, 65A, 65B ... casters, 66 ... notch, 72a ... drive shaft, 73 ... fixing means 74 ... Projection, 75 ... Shaft member, 76 ... Buffer, 77 ... Belt, 84 ... Rotating shaft, 88 ... Inclined surface, 89 ... First holding hole, 90 ... Second holding hole, 95 ... Anode, 97 ... Electrode installation portion, 98 ... second carriage, 99 ... electrode pressing body, 103 ... electrode support wall, 10 a ... insertion holes, 115 ... first mortar, 116 ... second mortar

Claims (5)

A cutting device for forming a groove having a predetermined length on a groove forming surface,
A rail body installed along the groove forming direction, and a groove forming portion guided along the rail body to form a groove on the groove forming surface,
The groove forming section includes a cutting blade that rotates around a support shaft to form a groove, a drive motor having a drive shaft for applying a rotational driving force to the cutting blade, and a rail on which the drive motor is installed. A guided body guided in the groove forming direction along the body,
The drive motor is fixed to the guided body so that the drive shaft is along the groove forming direction, and the cutting blade is disposed so that the support shaft is perpendicular to the drive shaft and parallel to the groove forming surface,
The groove forming portion further includes a support shaft holding member for holding the support shaft,
The support shaft holding member is arranged side by side on the cutting blade, one end side is fitted around the support shaft, and the other end side is fixed to the guided body ,
The rail body includes a pair of guide rails spaced apart in the axial direction of the support shaft, and the front ends of both guide rails are connected and fixed by a connecting body,
In a state where the guided body is inserted between the guide rails from the rear end side of the guide rails, the rail interval holding member that holds the separation distance between the rear end portions of both guide rails is provided between the rear end portions of both guide rails. cutting and wherein the are detachably provided, et al.   The cutting apparatus according to claim 1, wherein the drive motor is fixed to the guided body by an attachment belt wound around the drive shaft.   The cutting device according to claim 1 or 2, wherein the rail body includes a side guide surface for guiding the guided body in a groove forming direction at both side surface portions of the guided body. The support shaft holding member is formed in a plate shape, and a tip end portion on one end side of the support shaft holding member protrudes forward with respect to the cutting blade, and the guide body extends to the front end portion of the guide rail. 2. The cutting device according to claim 1 , wherein the cutting device abuts on the coupling body when moved. The guided body is a cart provided with wheels that are spaced apart in the groove forming direction, and the support shaft of the cutting blade is disposed on the front side of the wheel shaft of the front wheel. The cutting device according to claim 1 or 4 .

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