JP4444705B2 - Concrete chiseling machine - Google Patents

Description

  The present invention relates to a concrete chipping machine that performs cleaning, chipping, polishing, and the like by a water jet that is ultra-high pressure water jet.

  The water jet is a technology that applies a very high pressure to the water and destroys the opponent that hits it when it is jetted, and a special pump that generates ultra-high pressure in the water and the jet speed by narrowing the water flow to increase the breaking force And a holding / moving mechanism that reliably holds the nozzle against the reaction force of the jet and moves the nozzle to an appropriate position relative to the concrete surface that is the workpiece.

  As a thing using such a water jet, there is a concrete chipping machine which provides a water jet nozzle at the front part of a traveling vehicle body equipped with a traveling mechanism by wheels and crawler belts and injects this water jet while traveling. If the traveling direction is the X direction, a water jet nozzle holding / moving mechanism is provided at the front of the traveling vehicle body in order to obtain a working range in the Y direction perpendicular to the X direction.

  Such a water jet nozzle holding / moving mechanism is provided with a beam having a rail protruding in the front width direction of the traveling vehicle body, and travels on a water jet nozzle support having a roller that rolls the rail on the beam. It is attached as possible. Conventionally, there has been known a concrete chiseling machine capable of expanding the working range by shifting the tip of the water jet nozzle from the traveling vehicle body or tilting it with respect to the traveling vehicle body.

  As shown in FIGS. 17 and 18, the conventional concrete chipping machine is provided with a beam 4 incorporating a moving mechanism in the lateral width direction of the vehicle body 1, and a moving body 8 driven by the moving mechanism of the beam 4. The support device 10 for the water jet nozzle 14 is attached to the head.

  The support device 10 is bolted to the first vertical plate 11 having sliding rollers 24 that are engaged with the upper and lower rails 9 of the beam 4 so that the tip protrudes laterally. The second vertical plate 13 is supported at the tip of the link arm 12, and the support frame 15 of the water jet nozzle 14 that is rotationally driven by the second vertical plate 13 is bolted. The support frame 15 is bolted to the second vertical plate 13 with a variable mounting angle. (Patent Document 1 below)

Japanese Patent Application Laid-Open No. 07-164396

  According to this, the movable body 8 and the first vertical plate 11 attached to the movable body 8 move laterally to the left and right according to the length of the beam 4, but the water jet nozzle 14 of the support frame 15 is moved to the first vertical plate. Since the link arm 12 is positioned so as to project laterally from the plate body 11, the work range can be shifted by an amount corresponding to the link arm 12.

  Also, the overhanging interval can be adjusted by the inclination angle of the link arm 12 that is bolted to the first vertical plate 11, and the support frame 15 of the water jet nozzle 14 is further inclined to the second vertical plate 13. By stopping, a so-called swinging state can be obtained and the water jet nozzle 14 can be positioned obliquely.

  Thereby, the position of the water jet nozzle 14 can be shifted to the target concrete surface, and the water jet nozzle 14 can be positioned obliquely in accordance with the inclination of the concrete surface, so that the applicable work range can be expanded.

  By the way, when working in a place with a step, when the wheel or crawler of the traveling vehicle body 1 rides on the step, the vehicle body tilts, and accordingly, the beam 4 reciprocated by the water jet nozzle 14 tilts in an unintended direction. However, in order to finish the chipped surface uniformly, it is necessary to keep the reciprocating direction of the water jet nozzle 14 parallel to the concrete surface.

  Although not shown here, as a method of making the beam 4 parallel to the concrete surface even when the wheel or crawler belt of the traveling vehicle 1 rides on the step in a place with a step, The beam 4, the moving body 8, and the water jet nozzle 14 can be attached to the front surface of the slide arm that rotates and expands and contracts, and the slide arm can be rotated according to the inclination of the traveling vehicle body 1. There is a problem that the working range of the nozzle shifts from the target position.

  That is, if the rotation angle between the traveling vehicle body and the slide arm is θ and the distance from the rotation center of the slide arm to the tip of the water jet nozzle is R, the work range is shifted from the target position by a distance of Rsin θ. If the position adjustment is performed by moving the traveling vehicle body to compensate for this deviation, it takes time and effort to locate the working range of the water jet nozzle at the target position.

  An object of the present invention is to eliminate the inconvenience of the conventional example, and a concrete chipping machine capable of efficiently positioning a work device having a water jet nozzle with respect to a concrete surface to be worked regardless of the inclination of the traveling vehicle body. Is to provide.

In order to achieve the above object, the present invention provides a concrete chipping machine for supporting a water jet cutting device in which a support of a rotationally driven water jet nozzle is mounted on a beam so as to be able to travel on the rear side of the traveling vehicle body. In
It consists of a lower link, which is a left and right parallel link, and a center top link, and a multilink provided with a link cylinder on the upper side of the left and right lower links. Are connected, and a lateral rod is further bridged between the rear part of the rotating disk on the traveling vehicle body and the water jet cutting device. Thus, the link mechanism is constituted by the two link cylinders, the parallel multi-link and the lateral rod. it is intended to subject matter that this by supporting the water jet cutting apparatus from the vehicle body side with a water jet cutting device is non-follow a bearing against the inclination of the vehicle body.

  According to the first aspect of the present invention, the water jet cutting device is supported in a non-following manner with respect to the traveling vehicle body by the multi-link using the link cylinder that can expand and contract and the lateral rod. The jet cutting device can be freely operated in the vertical direction, and the water jet cutting device can be efficiently positioned parallel to the target concrete surface even in a place where there is a step and the traveling vehicle body is inclined.

In addition, the multi-link that connects the front part of the rotating disk on the traveling vehicle body and the water jet cutting device is composed of a lower link that is a left and right parallel link and a center top link, and further, A link cylinder is provided on the upper side, but all are composed of pivotable link arms, so a lateral rod is further bridged between the rear part of the rotating disk on the traveling vehicle body side and the water jet cutting device, and the water jet cutting device is installed. Supported.

In this way, the link mechanism is constituted by the two link cylinders 32, the parallel multi-links and the lateral rod, and the water jet cutting device is supported from the traveling vehicle body side so that the water jet cutting device is against the inclination of the traveling vehicle body. It was an unrivaled support.

  The invention according to claim 2 is provided with outriggers that slide on the concrete surface and maintain a constant distance between the water jet nozzle and the concrete surface on both sides of the water jet cutting device, and extend and contract to change the distance from the concrete surface. The gist is that the outrigger is provided with a structure.

  According to the second aspect of the present invention, since the outrigger that keeps the distance between the concrete surface and the water jet cutting device constant can be expanded and contracted, the outrigger on the upper stage is contracted or the lower outrigger is lowered in a place with a step. By stretching, the water jet cutting device can be easily made parallel to the concrete surface, and the efficiency is improved.

  The gist of the invention described in claim 3 is that at least one of the link cylinder and the outrigger is subjected to expansion / contraction control based on a detection signal of an inclination sensor for detecting the inclination of the traveling vehicle body.

  According to the third aspect of the present invention, since the inclination of the traveling vehicle body is detected and the link cylinder or / and the outrigger is controlled to expand and contract, the water jet cutting device is automatically leveled with respect to the concrete surface. This eliminates the trouble of operating the water jet cutting device so as to be horizontal with respect to the concrete surface, thereby further improving the efficiency.

  The gist of the invention described in claim 4 is that a slide arm is rotatably provided at the rear portion of the traveling vehicle body, and a water jet cutting device is slidably and rotatably provided on the slide arm.

  According to the fourth aspect of the present invention, when the water jet cutting device itself is made parallel to the concrete surface, it can move in a wide range along the concrete surface while maintaining its parallel state by the rotatable slide arm. Therefore, the water jet cutting device can be positioned more efficiently on the target concrete surface.

  According to a fifth aspect of the present invention, the beam has a telescopic structure in which the inner tube slides left and right with respect to the outer tube, one end is connected to the outer end of one inner tube, and the other end is connected to the other tube. The gist is that the second rail coupled to the outer end of the inner tube is arranged in parallel, and the sliding roller provided on the support is a double roller that engages with the first and second rails arranged in parallel.

  According to the fifth aspect of the present invention, since the beam expands and contracts in the lateral direction, the width in which the water jet nozzle can reciprocate is expanded, and the water jet cutting device can be efficiently and widely applied to the concrete surface. Can be positioned.

  The invention described in claim 6 is wound around the sprockets provided at both ends of the inner tube and the outer tube so that the endless chain for pulling and running the support is stretched regardless of the position of the inner tube. This is the gist. According to the seventh aspect of the present invention, racks parallel to the beam are arranged in parallel, and one is coupled to one end of the beam and the other is coupled to the other end of the beam, and the both racks are meshed and rotated. The gist is that the pinion moving by the above is coupled to the support.

  According to the sixth and seventh aspects of the present invention, the mechanism in which the water jet nozzle travels the expanding and contracting beam can be easily realized by using a chain or a rack and pinion.

  The concrete chipping machine of the present invention can efficiently position a work machine having a water jet nozzle parallel to the concrete surface of the work object regardless of the inclination of the traveling vehicle body.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is an overall left side view showing an embodiment of a concrete chipping machine of the present invention, FIG. 2 is a front view of the same, FIG. 3 is a right side view of the same, and FIG. 4 is a plan view of the same.

  1 is a crawler type traveling vehicle body having a rubber traveling crawler belt 1a, which is a diesel engine 2, an engine panel 2a, a radiator / oil cooler 3, a fuel tank 7, a precleaner 17a, an air cleaner 17, an exhaust muffler 18, and a hydraulic pump. In addition to the mechanism required for traveling, such as the traveling pump 5, an operating mechanism such as a hydraulic oil tank 6 is mounted, and a control panel 16 for performing various controls is provided that can be opened and closed by 90 ° from the traveling vehicle body 1. A patrol light 19, a headlight 19a, and the like that call attention to the surroundings during work are provided.

  The reason why the headlight 19a is provided at the front portion of the traveling vehicle body 1 is that the traveling vehicle body 1 is caused to travel forward so that the traveling vehicle body 1 does not travel on the chipped surface after the operation.

  A slide arm 20 that is rotatable in the lateral direction of the traveling vehicle body 1 is provided on the rear upper side of the traveling vehicle body 1, and a turntable 20 c is provided on the rear tip side of the slide arm 20. The slide expansion / contraction mechanism of the slide arm 20 is formed by disposing a cylinder (not shown) inside a prismatic body that is fitted and slid.

  The connecting portion between the traveling vehicle body 1 and the slide arm 20 is provided with an upper turning motor 20a in which the slide arm 20 rotates relative to the traveling vehicle body 1 by the rotation, and the connecting portion between the slide arm 20 and the rotating disk 20c is provided at the connecting portion. Is provided with a lower turning motor 20b that rotates the turntable 20c relative to the slide arm 20 by rotation thereof. And the water jet cutting device 29 as a working device is attached to the front part of the turntable 20c via the multilink mentioned later.

  The water jet cutting device 29 includes a lateral reciprocating drive mechanism for the water jet nozzle 14, a rotational drive mechanism for the water jet nozzle 14, and a swing drive mechanism.

  As shown in FIGS. 6 and 7, the beam jet 4 adopts a double tube structure of an inner tube 36 and an outer tube 37 as shown in FIGS. The inner tube 36 has a telescopic structure that slides left and right outward.

  Behind the beam 4, the first and second rails 9 a and 9 b are juxtaposed along the length direction of the beam 4, and the ends thereof are coupled to the flanges of the outer ends of the inner tubes 36. A sliding roller 24 as a double roller that runs on the rails 9a and 9b is provided above and below the support body 23 of the water jet nozzle 14, and the support body 23 is moved in the length direction of the beam 4 via the sliding roller 24. Install as possible.

  The support 23 is pulled by a traverse chain 35 that is stretched between the left and right ends of the beam 4 by a traverse motor 34 that is a hydraulic motor. The traverse chain 35 is endless, wound around a sprocket 36a provided at the outer end of each inner tube 36, wound around a sprocket 36b provided at the inner end of the inner tube 36, and then folded back. It winds around the sprocket 37a provided in the inner side outer end, and hangs around this sprocket 37a. In this way, even if each outer tube 37 moves to the left and right, the sprocket 37a always plays a role of absorbing the slack of the chain 35.

  Further, an auxiliary sprocket 37b is provided in the vicinity of the sprocket 37a, and the drive sprocket of the traverse motor 34 is pressed against the chain 35 between the sprockets 37a and 37b, so that power is reliably transmitted to the chain 35 in a state where the chain 35 is in tension. To do.

  The sliding mechanism of the outer tube 37 with respect to the inner tube 36 of the beam 4 may be manually operated or moved by a screw shaft. In this embodiment, the upper and lower sides of the first rail 9a are moved up and down. An expansion / contraction hydraulic cylinder 38 is bridged between the first connecting portion 9c connecting the upper and lower ends of the second rail 9b and the second connecting portion 9d connecting the upper and lower sides of the second rail 9b.

  As shown in FIG. 5, the water jet nozzle 14 is provided with a water jet nozzle 27 at the tip of a rotating shaft tube 26. As a rotation driving mechanism thereof, a swivel 25 is connected to the rotating shaft tube 26, and a gear. The nozzle 41 is rotated by a nozzle rotation motor 28 that is a hydraulic motor through a gear in the box 41. The rotational drive mechanism is fixedly mounted on a holding plate 42b of a swing frame 42 (described later) suspended from the upper portion of the support 23.

  The swing frame 42 is configured by vertically forming a holding plate 42b behind a swing plate 42a that is substantially parallel to the support 23, and the upper end of the swing plate 42a is connected to the left and right ends of the upper portion of the support 23. The rotating shaft 44 was fixed around a support piece 43 protruding rearward.

  In this state, the lower surface of the holding plate 42b is oriented horizontally with respect to the chip surface. Further, a swing motor 45 made of a hydraulic motor is fixed on the holding plate 42b, the tip of the rotation shaft projects from the bottom of the holding plate 42b, and the swing motor 45 rotates at the tip of the swing motor 45. A crank 46 that is changed to a swinging motion in the front-rear direction with respect to the support 23 is engaged, and one end of the crank 46 is fixed to the support 23. Thus, the swing motor 45 and the crank 46 constitute a swing drive mechanism.

  In addition to the reciprocating drive mechanism, the rotational drive mechanism, and the swing drive mechanism, a telescopic outrigger 22 using a cylinder is provided on both sides of the water jet cutting device 29, and a caster that slides in contact with the concrete surface at the lower end thereof. 21 is attached.

  Next, the structure of the multilink which connects the front part of the turntable 20c on the traveling vehicle body 1 side and the water jet cutting device 29 will be described. The multi-link 31 includes a lower link 31a that is a left and right parallel link and a center top link 31b, and a link cylinder 32 is provided above the left and right lower links 31a.

  Since all the multilinks 31 are constituted by pivotable link arms, a lateral rod 30 is further bridged between the rear portion of the rotating disk 20c on the traveling vehicle body 1 side and the waterjet cutting device 29, so that the waterjet cutting device 29 is provided. Is supported. In this way, the link mechanism is constituted by the two link cylinders 32, the parallel multi-links 31a and 31b, and the lateral rod 30, so that the water jet cutting device 29 is supported from the traveling vehicle body side, and the water jet cutting device is operated by the traveling vehicle body. The support was unrivaled with respect to the inclination. Further, as shown in FIG. 9, the traveling vehicle body 1 is provided with an inclination sensor 33 that detects the inclination of the traveling vehicle body 1. In addition, without providing the inclination sensor 33, it is possible to ensure parallelism to the floor with a free circuit of the link cylinder hydraulic pressure.

  Next, usage and operation will be described with reference to FIGS. When the traveling vehicle body 1 is moved to the work target position, when the traveling crawler belt 1a of the traveling vehicle body 1 rides on the step and the traveling vehicle body 1 tilts, the inclination sensor 33 detects the inclination, and a detection signal is sent to a control unit (not shown). send.

  The control unit calculates a deviation value that is a difference between a preset setting value and a detection value detected by the inclination sensor 33 so that the posture of the water jet cutting device 29 is set to a set posture. The cylinder 32 and the outrigger 22 are automatically expanded and contracted.

  As described above, if the inclination sensor 33 is not provided and the link cylinder hydraulic pressure free circuit ensures parallelism to the floor, the cylinder rod extends due to the hydraulic pressure set in advance in the link cylinder 32, and the outriggers. 22 presses the sliding surface and imitates the floor. By doing so, the water jet cutting device 29 takes a posture parallel to the floor.

  Since the water jet cutting device 29 does not follow the inclination of the traveling vehicle body 1 by using the link mechanism by the multi-link 31 and the lateral rod 30, the water jet cutting device 29 is automatically operated even when the traveling vehicle body 1 is inclined. The horizontal state can be secured. Note that it is more preferable to provide the control panel 16 with operation switches for operating the expansion and contraction of the link cylinder 32 and the outrigger 22 because the operator can further finely adjust the inclination of the water jet cutting device 29.

  Further, by rotating and sliding the slide arm 20 and rotating the turntable 20c, the water jet cutting device 29 is positioned along the inclined wall surface as shown in FIG. 10, or as shown in FIG. Even when it is positioned on the wall surface of the water jet, it is possible to support the load of the water jet cutting device 29 that cannot be supported by the multi-link 31 alone by the support using the lateral rod 30, and to stably support the water jet cutting device at a desired position. 29 can be positioned. Furthermore, in this case, by controlling not only the rotation / sliding operation of the slide arm 20 and the turntable 20c but also the expansion / contraction of the link cylinder, the water jet cutting device 29 can be more reliably along the inclination of the wall surface.

  Further, according to the support of the multi-link 31 and the lateral rod 30, the water jet cutting device 29 does not follow the inclination of the traveling vehicle body 1, while the chiseling operation is started and the traveling vehicle body 1 is moved to the arrow in FIG. When traveling in the direction, the lateral rod 30 reliably transmits the steering operation of the traveling vehicle body 1 to the water jet cutting device 29.

  Next, the chipping operation will be described. The traveling vehicle body 1 is caused to travel, and simultaneously, the transverse chain 35 is moved by the transverse motor 34 to reciprocate the support 23 along the beam 4. When the traveling vehicle body 1 travels, the beam 4 is supported by an outrigger 22 with left and right casters 21.

  Next, when the swing motor 45 is rotated, the rotation operation is converted into a backward swing operation with respect to the support 23 by the crank 46, and the swing plate 42a swings about the center of the rotation shaft 44 as the swing center. To do.

  Accordingly, the rotational drive mechanism coupled to the swing motor 45 via the holding plate 42b also swings backward with respect to the support 23. Then, about 240 (MPa) of high pressure water is supplied from the high pressure water inlet 47 at 60 (l / min), the water jet nozzle 14 is driven to rotate by the nozzle rotation motor 28, and the water jet nozzle 14 is driven by the swing motor 45. While swinging and driving, jet water from the water jet nozzle 14 is sprayed at an angle of about 22 degrees to perform operations such as peeling and polishing of concrete.

  In this way, the water jet nozzle 14 reciprocates in a direction perpendicular to the traveling direction of the traveling vehicle body 1 while rotating, while a swinging motion that swings in the traveling direction of the traveling vehicle body 1 is also added. As the width spreads and overlaps, no transverse stripes appear for each pitch on the chip surface, and a uniform and smooth chip surface can be finished. Moreover, when the chipping surface was observed, it was confirmed that the concrete below the reinforcing bar could be cut.

  Further, the beam 4 for moving the support 23 of the water jet nozzle 14 extends the hydraulic cylinder 38 and extends the inner tube 36 laterally outward with respect to the outer tube 37 when it is necessary to extend the beam 4. Slide. In such an extended state, as shown in FIG. 8, the first and second rails 9a and 9b move outward together with the inner tube 36, and are shifted to the left and right.

  On the other hand, the sliding roller 24 of the support 23 is a double roller, and both the rails 9a and 9b are engaged at the place where the first and second rails 9a and 9b are arranged. Since one of the double rollers engages with the rail even at the end where only this exists, the support 23 can move on the rail without any trouble.

  In the above embodiment, the support 23 is moved by pulling the traversing chain 35, but it may be moved by a rack and pinion. As shown in FIGS. 13 to 16, racks 39 a and 39 b are arranged vertically on the front surface of the beam 4 along the length direction of the beam 4 with the teeth facing the entire surface, and one end thereof is a rail (not shown in the figure). ) Are respectively coupled to the outer ends of the inner tube 36 of the beam 4 coupled thereto.

  On the other hand, a motor 34a is fixed on the support 23 side, and a pinion 34b in which two gears are vertically stacked so as to be engaged with the upper and lower racks 39a and 39b is fixed to the rotating shaft of the motor 34a. The upper and lower racks 39 a and 39 b are fixed by fixing pins 40.

  Next, the operation will be described. When the motor 34a is rotated, the pinion 34b moves while meshing with the racks 39a and 39b, and the support 23 moves along the beam 4. When the support 23 reaches the end of the beam 4, the motor 34 a is rotated in the reverse direction, and the support 23 is reciprocated along the beam 4 by repeating this.

  When it is necessary to extend the beam 4, the fixing pin 40 is pulled out, and the coupling between the upper and lower racks 39a and 39b is released. Further, the lock lever 40a is loosened, and the upper rack (movable rack) 39b is moved and separated from the pinion 34b as shown in FIG. Then, the hydraulic cylinder 38 is extended and the inner tube 36 is slid left and right outward with respect to the outer tube 37. In such an extended state, as shown in FIG. 14, the inner tube 36 connecting the first and second rails moves outward and shifts to the left and right.

  When the width of the beam 4 reaches the desired length, the fixed pin 40 is inserted, the movable rack 39a and the fixed rack (lower rack) 39b are reconnected, and the movable rack 39b is moved to the pinion 34b side. After pressing and meshing with each other, the lock lever 40a is tightened. The pinions 34b of the support body 23 are stacked one above the other and are engaged with both racks 39a and 39b at the place where both racks are lined up. Since one of the gears engages with the rack, the support 23 can move along the rack parallel to the beam 4 without any trouble.

1 is an overall left side view showing an embodiment of a concrete chipping machine of the present invention. It is the whole front view which shows one Embodiment of the concrete chipping machine of this invention. It is a right view which shows one Embodiment of the concrete chipping machine of this invention. It is a top view which shows one Embodiment of the concrete chipping machine of this invention. It is a side view of the important section showing one embodiment of the concrete chipping machine of the present invention. It is a front view of the reciprocating drive mechanism of the water jet nozzle of the concrete chipping machine of the present invention. It is a top view which shows the normal state of the beam of the reciprocating drive mechanism of the water jet nozzle of the concrete chipping machine of this invention. It is a top view which shows the state which the beam of the reciprocating drive mechanism of the water jet nozzle of the concrete chipping machine of this invention expanded. It is explanatory drawing seen from the back of the concrete chipping machine of this invention. It is a rear view which shows the state which rotated the slide arm and rotary disk of the concrete chipping machine of this invention. It is a rear view which shows the state which slid and rotated the slide arm of the concrete chipping machine of this invention. It is a top view which shows operation | movement of the concrete chipping machine of this invention. It is a front view of the beam shown as other examples of the reciprocating drive mechanism of the water jet nozzle of the concrete chipping machine of this invention. It is a front view which shows the state which the beam expanded as another example of the reciprocating drive mechanism of the water jet nozzle of the concrete chipping machine of this invention. It is a side view which shows the normal state of a beam as another example of the reciprocating drive mechanism of the water jet nozzle of the concrete chipping machine of this invention. It is a side view which shows the state which expanded the beam as another example of the reciprocating drive mechanism of the water jet nozzle of the concrete chipping machine of this invention. It is explanatory drawing from the side surface which shows a prior art example. It is explanatory drawing from the front which shows a prior art example.

DESCRIPTION OF SYMBOLS 1 Traveling body 1a Traveling crawler 2 Diesel engine 2a Engine panel 3 Radiator oil cooler 4 Beam 5 Traveling pump 6 Hydraulic oil tank 7 Fuel tank 8 Moving body 8 Traveling pump 9, 9a, 9b Rail 9c, 9d Connecting part 10 Support device 11 First vertical plate 12 Link arm 13 Second vertical plate 14 Water jet nozzle 15 Support frame 16 Control panel 17 Air cleaner 17a Pre-cleaner 18 Exhaust muffler 19 Patrite 19a Headlight 20 Slide arm 20a Upper turning motor 20b Lower turning motor 20c turntable 21 caster 22 outrigger 23 support 24 sliding roller 25 swivel 26 rotating shaft tube 27 water jet nozzle 28 nozzle rotation motor 29 water jet cutting device 30 Lateral rod 31 Multilink 31a Lower link 31b Top link 32 Link cylinder 33 Inclination sensor 34 Traverse motor 34a Motor 34b Pinion 35 Traverse chain 36 Inner pipe 37 Outer pipe 36a, 36b, 37a, 37b Sprocket 38 Hydraulic cylinder 39a, 39b Rack 40 Fixed Pin 40a Lock lever 41 Gear box 42 Oscillating frame 42a Oscillating plate 42b Holding plate 43 Supporting piece 44 Rotating shaft 45 Oscillating motor 45a Tip 46 Crank 47 High pressure water inlet

Claims (7)

In a concrete chiseling machine that supports a water jet cutting device that is mounted on a beam so that the support of a water jet nozzle that is driven to rotate can be run on the back of the traveling vehicle body,
It consists of a lower link, which is a left and right parallel link, and a center top link, and a multilink provided with a link cylinder on the upper side of the left and right lower links. Are connected, and a lateral rod is further bridged between the rear part of the rotating disk on the traveling vehicle body and the water jet cutting device. Thus, the link mechanism is constituted by the two link cylinders, the parallel multi-link and the lateral rod. A concrete chipping machine characterized in that the water jet cutting device is supported from the side of the traveling vehicle body so that the water jet cutting device is supported in a manner that does not follow the inclination of the traveling vehicle body.   An outrigger is provided on both sides of the water jet cutting device for maintaining a constant distance between the water jet nozzle and the concrete surface in sliding contact with the concrete surface, and the outrigger includes a telescopic structure for changing the distance from the concrete surface. The concrete chipping machine according to 1.   3. The concrete chiseling machine according to claim 2, wherein at least one of the link cylinder and the outrigger is subjected to expansion / contraction control based on a detection signal of an inclination sensor that detects an inclination of the traveling vehicle body.   4. A concrete chiseling machine according to any one of claims 1 to 3, wherein a slide arm is rotatably provided at a rear portion of the traveling vehicle body, and a water jet cutting device is slidably and rotatably provided on the slide arm.   The beam has a telescopic structure in which the inner tube slides left and right outward with respect to the outer tube, and a second rail is connected to the first rail connecting one end to the outer end of one inner tube and to the outer end of the other inner tube. The concrete crusher according to any one of claims 1 to 4, wherein the rails are arranged in parallel and the sliding rollers provided on the support body are double rollers engaged with the first and second rails arranged in parallel.   The concrete chipping machine according to claim 5, wherein an endless chain for pulling and supporting the support body is wound around sprockets provided at both ends of the inner pipe and the outer pipe so as to be stretched regardless of the position of the inner pipe.   A rack parallel to the beam is arranged in parallel, and one is coupled to one end of the beam and the other is coupled to the other end of the beam, and a pinion that moves by meshing with both racks is coupled to the support. 5. A concrete chiseling machine according to 5.

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