JP2005232897A - Crushing device for replacing expansion joint of bridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crushing device for replacing an expansion joint of a bridge which expedites the work for crushing a road surface by a packaged mechanical means without a need for manpower upon replacement of the expansion joint. <P>SOLUTION: The device comprises a road surface crushing means 12 supported by a supporting mechanism 13 mounted on a self-advancing vehicle 10 in such a manner that the crushing means 12 is movable in vertical and horizontal directions, a dust-proofing cover 40 covering around the crushing means 12, and a suction means whose suction opening communicates with the inside of the dust-proofing cover 40. The road surface crushing means 12 crushes the part of the road surface, where the expansion joint of the bridge is fitted, to form a channel, while the dust generated upon crushing is sucked by the suction means. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention mainly relates to a crushing apparatus for replacing an expansion joint of a bridge for performing replacement work of an expansion joint between bridges on an elevated road.

  In general, in bridges over elevated roads and rivers, the bridge girder expands and contracts due to temperature changes, so the expansion and contraction of the bridge piers is absorbed between the bridge and the bridge, or between the bridge and the stationary part such as the floor board in the longitudinal part. There is a gap for it. On the road surface portion, expansion joints for covering this gap are installed across both sides of the gap, and the expansion joints are formed into a plate shape with an elastic material such as rubber ( For example, Patent Document 1).

  This expansion joint is repeatedly stretched and contracted due to expansion and contraction of the bridge girder due to daily temperature changes, and fatigues due to the load generated when the vehicle travels on it, so periodic replacement is necessary. .

As shown in FIG. 13 (a), the expansion joint is replaced with the expansion joints a that are installed across the expansion joint concrete 2 and 2 on both sides of the joint gap 1 and fixed by the reinforcing bars 3. b), and after that, as shown in (c), the joint concrete 2 and 2 are crushed and removed by using a rock drill or the like, and the anchor portion 3a of the reinforcing bar 3 is left. (D), a new reinforcing bar 4 is applied, and as shown in (e), the end and the expansion joint mounting space are surrounded by the mold 5 and new joint concrete 2a, 2a is placed. . After the concrete is solidified, the mold 5 is removed, and a new expansion joint is installed in the same arrangement as (a) to complete the replacement.
Japanese Patent Application Laid-Open No. 07-207623

  Since all the conventional expansion joint replacement methods described above are performed manually, there is a problem that much labor and time are required.

  SUMMARY OF THE INVENTION In view of such conventional problems, the present invention requires the most labor in the conventional expansion joint replacement work, and can perform work with a poor work environment such as noise and dust without requiring manual labor as in the prior art. The purpose of the present invention is to provide a crushing device for replacing an expansion joint of a bridge that can be quickly performed by the machine device.

  The feature of the invention described in claim 1 for solving the conventional problems as described above and achieving the intended purpose is that the support mechanism mounted on the self-propelled vehicle can move in the vertical and horizontal directions. A road surface crushing means that is supported; a dust-proof cover that covers the periphery of the road surface crushing means; and a suction means that has a suction port in communication with the dust-proof cover. In the crushing apparatus for replacing the expansion joint of a bridge, the dust generated during crushing is crushed into a groove shape and sucked by the suction means.

  According to a second aspect of the present invention, in addition to the configuration of the first aspect, the support mechanism is mounted on the rear end portion of the load carrier of the self-propelled vehicle and is parallel to the rear edge portion of the load carrier or the A horizontal movement mechanism that supports the loading table so as to be movable in a direction perpendicular to the direction and the rear edge, and a substantially vertical direction from a direction parallel to the loading table to the rear end portion of the loading table of the horizontal movement mechanism The guide post is supported so that the angle can be changed, and the slide post is supported so as to be movable in the longitudinal direction with respect to the guide post.

  According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, the suction means is mounted on a vacuum pipe communicated in a dust-proof cover, and on a cargo bed of the vehicle, and the suction means is passed through the vacuum pipe. A suction pump that sucks dust in the dust cover together with air and / or water, and a dust remover that separates dust from the air and / or water sucked by the suction pump.

  According to a fourth aspect of the present invention, in addition to the configuration of the second or third aspect, the horizontal movement mechanism, the suction pump, and the dust remover are mounted on one support base, and are simultaneously loaded onto and unloaded from the vehicle. It is to be able to do it.

  According to a fifth aspect of the present invention, in addition to the configuration of the first to third or fourth aspects, the road surface breaking means includes a plurality of core cutters having a cutting portion at a tip edge of the rotating cylinder. It is in.

  The feature of the invention described in claim 6 is that, in addition to the configuration of claims 1 to 3 or 4, the road surface breaking means is configured by providing a plurality of rotating disks having a cutting portion on the periphery in a coaxial arrangement. It is in.

  According to a seventh aspect of the present invention, in addition to the configuration of the first to third or fourth aspects, the road surface breaking means includes a plurality of concrete breakers for crushing concrete by vibrating a tapered crushing bit in the axial direction. It is in the composition.

  As described above, the present invention stops the self-propelled vehicle at the working position by supporting the road crushing means so as to be movable in the vertical and horizontal directions by the support mechanism mounted on the self-propelled vehicle. In this state, the work of crushing the road surface into a groove shape by the excavation head and forming a new concrete placement space for installing a new joint can be performed by mechanical work, and automation is facilitated, thereby improving work efficiency. And a dust-proof cover covering the periphery of the road surface crushing means, and a suction means having a suction port communicated with the dust-proof cover. The road surface crushing means crushes the road surface of the expansion joint attachment portion of the bridge into a groove shape. Since the dust generated during crushing is sucked by the suction means, measures against dust and noise are facilitated and the working environment is improved.

  According to a second aspect of the present invention, the support mechanism is mounted on the rear end portion of the load carrier of the self-propelled vehicle, and is parallel to the rear edge portion of the load carrier or perpendicular to the rear edge portion. A horizontal movement mechanism that supports the loading table so as to be movable in the direction, and a rear end portion of the loading table of the horizontal movement mechanism is supported so that the angle can be changed from a direction parallel to the loading table to a substantially vertical direction. By comprising a guide column and a slide column supported so as to be movable in the longitudinal direction with respect to the guide column, the operability of the crushing means is improved, and the road surface crushing work of the expansion joint part is improved. It can be completed in a short time with little effort, and the road closing time can be shortened.

  According to a third aspect of the present invention, the suction means includes a vacuum pipe communicated with the inside of the dust-proof cover, and a suction pipe that is mounted on the loading platform of the vehicle and sucks the dust in the dust-proof cover together with air and / or water through the vacuum pipe. By providing a pump and a dust remover that separates dust from the air and / or water sucked by the suction pump, it is possible to substantially completely prevent dust from being scattered at the time of crushing. Noise during crushing can be reduced.

  Further, as in claim 4, the horizontal movement mechanism, the suction pump and the dust remover are mounted on one support base and can be loaded onto and unloaded from the vehicle at the same time. The general-purpose truck and the dump truck that have been used can be used, and the economy is improved.

  Furthermore, as in claims 5 to 7, the crushing head vibrates in the axial direction a core cutter having a cutting part at the tip edge of the rotating cylinder, a rotating disk having a cutting part at the periphery, and further a tapered crushing bit. By using a concrete breaker that crushes the concrete, the crushing of the groove of the concrete is performed well.

  Next, embodiments of the present invention will be described based on the examples shown in FIGS. In the figure, reference numeral 10 denotes a self-propelled vehicle, which uses a truck or dump truck having a size of about 4 tons. On the 10 loading platform of this vehicle, a single support platform 11 that can be loaded and unloaded by a loading machine such as a forklift is mounted, and various devices constituting the present invention are mounted thereon.

  A support mechanism 13 for supporting a road surface crushing means 12 described later is mounted on the last part of the support base 11. The support mechanism 13 is for moving the road surface crushing means 12 in the vertical direction and the horizontal direction during the road surface crushing operation, and includes a horizontal movement mechanism 14, a guide column 15, and a slide column 16.

  The horizontal movement mechanism 14 is supported on a pair of left and right guide rails 20 and 20 fixed to the rear end portion of the support base 11 and is movable on the left and right guide rails 20 and 20 in the longitudinal direction of the rails. The left-right direction moving base 21, the front-rear direction guide rails 22, 22 fixed on the left-right direction moving base 21, and the horizontal direction supported on the front-rear direction guide rails 22, 22 so as to be movable in the longitudinal direction of the rails. It is comprised from the movement stand 23. FIG. Although not shown, the horizontal movement table 21 and the horizontal movement table 23 are moved on the guide rails by drive motors, and the horizontal movement table 23 can be moved in any direction, front, back, left, and right by remote control. It is like that.

  A guide column 15 is attached to the rear end of the horizontal moving table 23 so as to be rotatable about a pivot shaft 24 directed in the left-right direction. A slide column 16 is slidably supported by the guide column 15, and the relative position in the longitudinal direction of both columns 15, 16 can be changed by a drive motor 17.

  The road surface crushing means 12 has a concrete breaking mechanism 30 for cutting or crushing concrete. As the concrete breaking mechanism 30, for example, a core drill type shown in FIGS. 4 to 6 can be used. In this mechanism, a plurality of drive shafts 33 rotated by an air motor 32 are arranged side by side with respect to the support frame portion 31, and a diamond core bit 35 is fixed to each drive shaft 33. It has a structure in which a diamond cutter portion 35b is integrally provided at the tip of a cylindrical main body portion 35a, and is rotated around the cylindrical center of the main body portion 35a to press the cutter portion 35b against the concrete surface. Concrete is cut into a columnar shape.

  The periphery of the crushing head 31 is covered with a dust-proof cover 40, and a skirt-like movable plate 40a formed of a rubber-like elastic plate material is attached to the lower end edge of the dust-proof cover 40 so as to be movable up and down. .

  The diamond core bit 35 protrudes from the lower edge of the dust-proof cover 40 by the cuttable depth, and the movable plate 40a is installed so as to move up and down at least the length of the cuttable depth. .

  A water spray nozzle 41 for cooling and a suction cylinder 42 for sucking surplus water containing cutting waste are inserted in the dust cover 40 so that the concrete can be cut while supplying cooling water from a water supply pipe 43. It has become.

  Moreover, as the concrete breaking mechanism 30, the disk cutter type | mold shown in FIGS. 7-9 can also be used. This mechanism is provided with a rotating shaft 51 for attaching a disk in a horizontal direction in a casing 50 serving as a dust-proof cover whose lower end is opened, and is rotated by an air motor 52. A plurality of diamonds are attached to the rotating shaft 51. The disk 53 is fixed at a small interval, and is rotated and pressed against the concrete so that grooves corresponding to the number of disks can be formed by cutting. The diamond disk 53 has a structure in which a diamond cutter is disposed on the outer periphery of a disk-shaped main body.

  Similarly to the core drill type described above, a water spray nozzle 41 for cooling and a suction cylinder 42 for sucking surplus water containing cutting waste are inserted into the casing 50, and cooling water is supplied from a water supply pipe 43. However, the concrete can be cut while a skirt-like movable plate 50a formed of a rubber-like elastic plate material is attached to the lower end portion of the casing 50 so as to be movable up and down. At least the length corresponding to the cutting depth by the diamond disk can be moved up and down.

  Furthermore, the vibration breaking type (breaker type) shown in FIGS. 10 to 12 can be used as the concrete breaking mechanism 30. This mechanism is fixed in a state in which a plurality of cylindrical breaker cases 61 whose lower ends are opened with respect to the support frame 60 are arranged, and a vibration breaker 62 is inserted into each breaker case 61 via a vibration absorbing spring 63. It is housed in a suspended state.

  The breaker 61 uses a structure in which a crushing bit 65 having a tapered rod shape is fixed to the tip of a breaker 62 that vibrates the head portion with compressed air, and protrudes at least from the lower end of the crushing bit 65 breaker case 61. In place.

  A skirt-shaped dust-proof cover 66 is fixed to the support frame 60 so as to cover the periphery of the breaker case 61, and a skirt-like shape formed of a rubber-like elastic plate material at the lower end of the dust-proof cover 61. The movable plate 66a is attached so as to be movable up and down, and the movable plate 66a can move up and down at least the length of the crushable depth by the crushing bit 65.

  The support frame 60 is connected to a compressed air introduction pipe 67 for operating the breaker and a suction cylinder 68 for sucking air in the dust cover 61.

  The support base 11 mounted on the vehicle 10 includes a suction pump 71 that sucks water and / or air through a vacuum pipe 70 from a suction cylinder opened in the dustproof cover on the front side of the support mechanism 13 described above, and A dust collector 72 that separates dust from water and air sucked by a suction pump, a compressor 73 that supplies compressed air, a water supply pump 74 that supplies water, an electric welding machine 75, a gas cylinder 76 for gas welding fusing, and the like are mounted. These can be loaded and unloaded at once on the loading platform of the vehicle.

  When using the apparatus configured as described above, as shown in FIG. 1, the horizontal movement mechanism 14 is disabled during traveling of the vehicle, such as moving to a work site, and the guide column 15 is positioned at or near the horizontal angle. Until the road surface crushing means 12 is lifted.

  At the work site, as shown in FIG. 2, the guide column 15 is rotated in the vertical direction to fix the angle, and the slide column 15 is lowered along the guide column 15 to move the horizontal position horizontally. The concrete breaking mechanism 30 is pressed against the road surface by adjusting the mechanism 14, and the road surfaces on both sides of the expansion joint gap are crushed into grooves.

  In the case of using the above-described core drill type crushing mechanism, this crushing operation is sequentially performed by cylindrical cutting with a plurality of diamond core bits 35 while changing positions. At this time, cutting is performed while sprinkling water from the water spray nozzle 41, and surplus water is sucked through the vacuum pipe 70 together with the cutting waste, and the dust collection device 72 separates the cutting waste and water. Moreover, since the movable plate 40a of the dustproof cover 40 is in contact with the road surface during the cutting operation, scattering of cutting waste and water around is prevented.

  After the road surface is cut with the core cutter in this way, the core portion and the concrete between the cores cut into a columnar shape are crushed and removed by using a hammer or a scissors, and the road surface is crushed into a necessary groove shape.

  Further, in the case of using the disk cutter type crushing mechanism described above, the disk 53 is moved so that narrow grooves corresponding to the number of disks are formed on the road surface. The strip-shaped concrete between the narrow grooves formed by this is crushed with a hammer or a hammer, and the road surface is crushed into grooves.

  In cutting, watering from the watering nozzle 41, excess water, and removal of cutting debris are the same as in the core cutter mold.

  Further, in the case of using a vibration crushing type crushing mechanism, the crushing head 30 is lowered toward the road surface, and the crushing bit 65 of the breaker 61 is driven to crush the road surface into a groove shape. The dust in the dust cover 66 generated at this time is sucked through the vacuum pipe 70 and removed by the dust collector 72.

  Regardless of which crushing mechanism is used, cutting of the road surface with a core bit or a disk cutter and crushing with a breaker are performed with the movable plate at the lower end of the dust cover in contact with the road surface. Work is done in a state where dust and dust are not scattered around.

It is a side view showing the whole outline at the time of movement of the device concerning the present invention. It is a side view which shows the state at the time of the road surface fracture | rupture work by the apparatus shown in FIG. It is a top view same as the above. It is a bottom view which shows the outline of the concrete fracture mechanism used for the apparatus shown in FIG. It is the sectional view on the AA line in FIG. FIG. 6 is a sectional view taken along line B-B in FIG. 5. It is a bottom view which shows the outline of the other example of the concrete fracture apparatus used for this invention apparatus. It is CC sectional view taken on the line in FIG. It is the DD sectional view taken on the line in FIG. It is a bottom view which shows the outline of the further another example of the concrete fracture apparatus used for this invention apparatus. It is the EE sectional view taken on the line in FIG. It is the FF sectional view taken on the line in FIG. a to d are cross-sectional views showing a conventional expansion joint replacement process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Self-propelled vehicle 11 Support stand 12 Road surface crushing means 13 Support mechanism 14 Horizontal movement mechanism 15 Guide support column 16 Slide support 17 Drive motor 20 Left-right direction guide rail 21 Left-right direction movement table 22 Front-rear direction guide rail 23 Horizontal movement table 24 pivot Support shaft 30 Concrete crushing mechanism 31 Support frame portion 32 Air motor 33 Drive shaft 35 Diamond core bit 35a Main body portion 35b Diamond cutter portion 40 Dust-proof cover 40a Movable plate 41 Sprinkling nozzle 42 Suction cylinder 43 Water supply pipe 50 Casing 50a Movable plate 51 Rotating shaft 52 Air motor 53 Diamond disk 60 Support frame 61 Breaker case 62 Breaker 63 Vibration absorbing spring 65 Crushing bit 66 Dustproof cover 66a Movable plate 67 Compressed air introduction pipe 68 Suction Cylinder 70 vacuum pipe 71 the suction pump 72 dust collector 73 Compressor 74 water feed pump 75 Electric welder 76 gas cylinders

Claims (7)

  A road surface crushing means supported so as to be movable in the vertical and horizontal directions by a support mechanism mounted on the self-propelled vehicle, a dust cover covering the periphery of the road surface crushing means, and a suction port communicated with the dust cover. A bridge expansion joint for replacing a bridge with an expansion joint mounting portion of the bridge, which crushes the road surface of the expansion joint mounting portion of the bridge into a groove shape by the road surface crushing means and sucks dust generated during the crushing by the suction means. Crushing equipment.   The support mechanism is mounted on the rear end of the loading platform of the self-propelled vehicle, and supports the loading platform so as to be movable in a direction parallel to the rear edge of the loading platform or in a direction perpendicular to the direction and the rear edge. A horizontal movement mechanism, a guide column supported at a rear end portion of the loading table of the horizontal movement mechanism so that the angle can be changed from a direction parallel to the loading table to a substantially vertical direction, and the guide column. The bridge expansion and contraction replacement crushing apparatus according to claim 1, further comprising a slide column supported so as to be movable in a longitudinal direction of the bridge, and a road surface crushing means supported by the slide column.   The suction means includes a vacuum pipe communicated with the inside of the dust cover, a suction pump that is mounted on the loading platform of the vehicle and sucks the dust in the dust cover together with air and / or water through the vacuum pipe, and the suction pump. The crushing apparatus for replacing an expansion joint of a bridge according to claim 1 or 2, further comprising a dust remover that separates dust from the sucked air and / or water.   The crushing apparatus for replacing an expansion joint of a bridge according to claim 2 or 3, wherein the horizontal movement mechanism, the suction pump, and the dust remover are mounted on a single support base and can be loaded and unloaded simultaneously with respect to the vehicle.   The road surface breaking means is a crushing apparatus for replacement of an expansion joint for a bridge according to claim 1, wherein the road surface breaking means comprises a plurality of core cutters each having a cutting portion at a tip edge of a rotating cylinder.   The road surface breaking means is a crushing apparatus for replacement of an expansion joint for a bridge according to claim 1, wherein a plurality of rotating disks each having a cutting portion at a peripheral edge are provided in a coaxial arrangement.   5. The crushing apparatus for replacing an expansion joint of a bridge according to claim 1, wherein the road surface breaking means comprises a plurality of concrete breakers for crushing concrete by vibrating a tapered crushing bit in the axial direction.

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