Cutting device and concrete member cutting method

Abstract

To provide a cutting device that forms, in a concrete member, a cut surface having a width in a thickness direction of the member precisely and smoothly by using a wire saw without setting restrictions on the thickness of the member.SOLUTION: A cutting device that forms a cut surface in a concrete member, the device comprising an endless wire saw that is placed penetrating through the concrete member, a drive mechanism that causes the wire saw to travel in orbit, a storage mechanism that stores an extra length part of the wire saw, a plurality of driven pulleys around which the wire saw is wound, and a pair of support devices and a pair of running devices that support the driven pulleys. The pair of support devices is arranged on the front and back sides of the concrete member, and the pair of running devices is arranged so as to be able to run on the front side and back side of the concrete member in the direction in which the cut surface is formed.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a cutting device for cutting concrete members and a method for cutting concrete members using the cutting device.

Background Art

[0002] For example, when cutting asphalt or concrete paving on a road, a disk-shaped cutter blade may be employed. Patent Document 1 discloses a concrete cutter in which a cutter blade rotated by a blade driving device is provided at the lower part of a carriage together with wheels. The cutter blade has many advantages such as not only having a precise and smooth cutting surface but also being able to form a curved cutting surface.

[0003] Therefore, it is also adopted during the removal work of an existing deteriorated floor slab in renewal work of a floor slab of a road bridge or a floor slab bridge (hollow floor slab bridge or follow slab). However, when the thickness of the existing floor slab to be cut exceeds about 800 mm, the entire thickness cannot be cut in a single cutting operation. Therefore, so-called step cutting, in which cutting is repeated a plurality of times in increments of about 100 mm, has to be carried out.

[0004] Step cutting not only requires a great deal of time for the work but also has many problems such as chipping occurring on the cutter blade. For this reason, when the member thickness of the existing floor slab is large, it is common to cut with a wire saw. Patent Document 2 discloses a disassembling device for a floor slab of a bridge using a wire saw.

[0005] The disassembling device for a floor slab of a bridge in Patent Document 2 mounts a first cutting means and a second cutting means on a device body that moves forward and backward in the front-rear direction by the operation of an operator. The first cutting means cuts along the bridge axis direction between a stud planted on the upper flange of a steel girder and the floor slab directly above the upper flange to form a horizontal cutting surface. The second cutting means cuts along the bridge axis direction on both the left and right sides sandwiching the steel girder of the floor slab to form a vertical cutting surface. And an endless wire saw is adopted for this first cutting means and second cutting means. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2019-138127 [Patent Document 2] Japanese Patent Publication No. 2019-031868 [Overview of the project] [Problems that the invention aims to solve]

[0007] According to Patent Document 2, a worker can manually push or pull a deck slab demolition device, and a second cutting means employing a wire saw can form a vertical cut surface along the bridge axis direction in an existing deck slab with a large deck thickness. However, when the wire saw is pressed against the existing deck slab, it tends to move towards the weaker parts of the existing deck slab, making it difficult to precisely cut along the planned cutting line. Therefore, the worker has to manually correct the cutting direction of the wire saw each time it deviates from the planned cutting line.

[0008] However, repeatedly correcting the cutting direction can easily create irregularities on the cut surface. As a result, when attempting to lift the existing deck slab in the section to be removed after cutting, friction occurs between it and the remaining section of the existing deck slab, making smooth lifting impossible. Therefore, it becomes necessary to perform a so-called double cut to create clearance for lifting, which adds considerable effort to the removal work.

[0009] Furthermore, in order to vertically cut an existing floor slab using a wire saw, it is necessary to place pulleys on both the top and bottom of the existing floor slab to which the wire saw is wrapped. However, Patent Document 2 does not specify the concrete configuration, and the specific structure that allows for vertical cutting of an existing floor slab using an endless wire saw remains unclear.

[0010] The present invention has been made in view of the above problems, and its main objective is to use a wire saw to precisely and smoothly form a cut surface having a width in the thickness direction of the member on a concrete member, without imposing any limitations on the member thickness. [Means for solving the problem]

[0011] To achieve this objective, the cutting device of the present invention cuts concrete members Having a width in the thickness direction of the member from the front surface to the back surface. A cutting device for forming a cut surface, wherein the concrete member Penetrating in the thickness direction of the member An endless wire saw, a drive mechanism for making the wire saw travel in a circular motion, a storage mechanism for storing the excess length of the wire saw, a plurality of driven pulleys around which the wire saw is routed, a pair of support devices and a pair of traveling devices for supporting the driven pulleys, A pair of running rails are installed on the surface and back surface of the concrete member via a support mechanism and are aligned with the direction in which the cut surface is formed, The pair of support devices are arranged on the front and back sides of the concrete member, and each of the pair of traveling devices is located on the concrete member Supported by a pair of running rails installed on the front and back surfaces It is characterized by the following:

[0013] The cutting device of the present invention is characterized in that the traveling device is equipped with a self-propelled traveling means.

[0014] The cutting device of the present invention is characterized in that the traveling device is driven by a towing-type traveling means.

[0015] The cutting device of the present invention is characterized in that the concrete member is a concrete deck slab or deck bridge that constitutes a bridge.

[0016] The concrete member cutting method of the present invention is a concrete member cutting method using the cutting device of the present invention, wherein the concrete member Supported by a pair of running rails installed on the front and back surfaces, aligned with the direction in which the cut surface is formed. By moving the pair of aforementioned traveling devices, between the traveling devices and penetrates the concrete member in the direction of the member thickness The wire saw is characterized by being pressed against the concrete member while the wire saw is driven in a circular motion via the drive mechanism.

[0017] According to the cutting device and concrete member cutting method of the present invention, a pair of traveling devices supporting a driven pulley around which an endless wire saw is wrapped are arranged on the front and back sides of the concrete member. This makes it possible to continuously form a cut surface with a width from the front side to the back side in the direction of travel of the traveling devices in a single cutting operation, without imposing any restrictions on the thickness of the concrete member, such as whether it is thin plate-shaped or layered.

[0018] Furthermore, the cutting direction of the wire saw (the direction in which the cut surface is formed) can be controlled by a pair of travel devices. This makes it easy to create a smooth cut surface with minimal irregularities, precisely aligned with the planned cutting line. If the travel devices are guided by a guide section, an even more precise cut surface can be formed.

[0019] Furthermore, by forming a smooth cut surface with minimal irregularities, the phenomenon of friction between the cut portion of the concrete member and the remaining concrete member when lifting the cut portion after the cutting work is completed is reduced, thereby improving the efficiency of the removal work. In addition, the travel device can be either self-propelled or towed, and the cutting speed for cutting concrete members can be maintained at the typical speed of wire saw cutting, so there is no disruption to the construction period.

[0020] Therefore, for example, when applied to cutting work on existing concrete deck slabs or deck bridges in road bridge deck slab replacement work (work involving cutting and removing the existing deck slab and replacing it with a new deck slab) or bridge reconstruction work (work involving cutting and removing the members of the existing deck bridge and replacing them with members of the new deck bridge), it can contribute to improving the work efficiency related to deck slab and deck bridge replacement work.

[0021] In addition, since it is possible to form a cut surface in which the cutting direction by the wire saw precisely follows the planned cutting line, it is also possible to set the design margin secured along the planned cutting line to be narrow. As a result, when implementing the above-mentioned floor slab of the road bridge or the floor slab bridge replacement work by the half-section floor slab replacement method (a method of removing the existing floor slab or floor slab bridge for each half-section while performing lane control), it is also possible to set it in the vicinity of the regulation line provided between the planned cutting line and the lane in use, and perform the cutting operation.

Advantages of the Invention

[0022] According to the present invention, by arranging a pair of traveling devices that support a driven pulley around which an endless wire saw is wound on the front surface side and the back surface side of the concrete member, it is possible to precisely and smoothly form a cut surface having a width in the member thickness direction in the concrete member without providing a limit to the member thickness.

Brief Description of the Drawings

[0023] [Figure 1] It is a view showing a cutting device as viewed from the bridge axis direction in an embodiment of the present invention. [Figure 2] It is a view showing a cutting device as viewed from a direction perpendicular to the bridge axis in an embodiment of the present invention. [Figure 3] It is a view showing the first and second traveling devices as viewed from the bridge axis direction in an embodiment of the present invention. [Figure 4] It is a view showing a state where a cut surface is formed on a hollow floor slab using a cutting device in an embodiment of the present invention. [Figure 5] It is a view showing another example of a cutting device in an embodiment of the present invention (position of the equipment unit). [Figure 6] It is a view showing another example of a cutting device in an embodiment of the present invention (traveling means of the first and second traveling devices). [Figure 7] It is a view showing another example of a cutting device in an embodiment of the present invention (installation position of the first support device). [Figure 8]This figure shows another example of the cutting apparatus in the embodiment of the present invention (position of the cutting surface). [Modes for carrying out the invention]

[0024] The present invention relates to an apparatus and method for forming a cut surface having a width in the thickness direction of a concrete member. The concrete member to be cut can be any of the following: floor slabs and walls of buildings, concrete decks of bridges, deck bridges, or artificial ground.

[0025] Furthermore, either a push-cut or pull-cut method can be used for cutting with a wire saw. Below, we will explain the details of the cutting device and concrete member cutting method, using the push-cut method to cut the concrete deck slab in the bridge axis direction in a road bridge deck slab or deck bridge replacement project (a project in which the existing deck slab or deck bridge is cut and removed and replaced with a new deck slab or deck bridge), with reference to Figures 1 to 8.

[0026] As shown in Figures 1(a) and (b), the hollow slab bridge 200 is equipped with a hollow concrete slab 201 having a cylindrical hollow section in the direction of the bridge axis. The wire saw 10 that penetrates this hollow slab 201 in the direction of the slab thickness W is made of diamond saw wire processed into an endless shape and is wrapped around a cutting device 100 covered with protective covering 300.

[0027] ≪≪≪Cutting device 100≫≫≫ As shown in Figures 2 and 3, the cutting device 100 comprises first and second traveling devices 40a and 40b, first and second support devices 50a and 50b, an equipment unit D, and a pair of traveling rails 60 provided on the road surface 202 side and the underside 203 side of the hollow slab 201. It also includes a support mechanism 80 for installing the equipment unit D and the pair of traveling rails 60 on the hollow slab 201.

[0028] ≪≪Running Rail 60≫≫ As shown in Figure 2, the pair of running rails 60 are provided on both the road surface 202 side and the underside 203 side of the hollow slab 201, and include a guide portion 61 that extends along the hollow slab 201 and a plurality of guide support members 62 that support the guide portion 61.

[0029] Multiple guide supports 62 are arranged at intervals in the direction of the bridge axis and support the guide section 61 so that it extends along the bridge axis. The guide supports 62 are also slidably installed in the direction of extension of the guide section 61, and are detachably installed on both the road surface 202 side and the lower surface 203 side of the hollow deck slab 201 via a support mechanism 80.

[0030] The support mechanism 80 is not limited in any way as long as it has a configuration for stably installing the guide support 62. In this embodiment, as shown in Figure 3, a column base 81 connected to the guide support 62, a frame 82 that supports the column base 81, and an anchor member 83 that is embedded in the hollow floor slab 201 and fixes the frame 82 are employed.

[0031] The guide portion 61, supported by the guide support 62 described above, is mounted to the guide support 62 so as to be movable in the height direction, and supports the first and second traveling devices 40a, 40b and the first and second support devices 50a, 50b.

[0032] <<<First and second support devices 50a, 50b>>> As shown in Figure 2, the first support device 50a is a device that supports the first to third driven pulleys 51 to 53 and the tenth driven pulley 56 around which the wire saw 10 is routed. The second support device 50b is a device that supports the eighth to ninth driven pulleys 54 to 55 around which the wire saw 10 is routed.

[0033] Each of these is equipped with a pulley frame 59 that is attached to the guide section 61 of the running rail 60, and the driven pulleys (51-56) are mounted on this pulley frame 59 so as to be able to rotate vertically. The first and second running devices 40a and 40b are positioned on the front side (left side of the paper) of the first and second support devices 50a and 50b, respectively.

[0034] <<<First and second traveling devices 40a, 40b>>> As shown in Figure 2, the first traveling device 40a is a device that supports the fourth and fifth driven pulleys 41 and 42 around which the wire saw 10 is wound. The second traveling device 40b is a device that supports the sixth and seventh driven pulleys 43 and 44. Each of these is equipped with a pulley frame 45 that is mounted on the guide section 61 of the traveling rail 60, and the driven pulleys (41 to 44) are mounted on this pulley frame 45 so as to be able to rotate vertically.

[0035] Furthermore, as shown in Figure 3, the pulley frame 45 is equipped with a movable body 46 and a feed device 47 that drives the movable body 46 as self-propelled traveling means for moving the first and second traveling devices 40a and 40b along the guide section 61. Any type of movable body 46 may be used, for example, a pinion may be used and a corresponding rack may be formed in the guide section 61.

[0036] As shown in Figure 4, the first and second support devices 50a, 50b and the first and second traveling devices 40a, 40b are all arranged in pairs on the road surface 202 side and the underside 203 side, with the hollow slab 201 in between. Each driven pulley supported by these rotates in the vertical direction. Therefore, the wire saw 10 is arranged to be able to travel in a circular motion within a vertical plane that includes the road surface 202 side and the underside 203 side, with the hollow slab 201 in between.

[0037] Specifically, on the road surface 202 side, the first to third driven pulleys 51 to 53, supported by the first support device 50a, guide the wire saw 10 between the equipment unit D and the first traveling device 40a. In addition, the fourth to fifth driven pulleys 41 to 42, supported by the first traveling device 40a, guide the wire saw 10 between the first support device 50a and the second traveling device 40b.

[0038] On the other hand, on the lower surface 203 side, the 6th and 7th driven pulleys 43 and 44, supported by the second traveling device 40b, guide the wire saw 10 between the first traveling device 40a and the second support device 50b. In addition, the 8th and 9th driven pulleys 54 and 55, supported by the second support device 50b, guide the wire saw 10 between the second traveling device 40b and the equipment unit D via the 10th pulley 56, supported by the first support device 50a.

[0039] The wire saw 10 penetrates the hollow slab 201 between the fifth and sixth driven pulleys 42 and 43, and between the ninth and tenth driven pulleys 55 and 56. In this embodiment, vertical refers to the direction parallel to the slab thickness W of the hollow slab 201. Horizontal refers to the direction intersecting the slab thickness W of the hollow slab 201 and parallel to the road surface 202 or the underside 203 of the hollow slab 201.

[0040] <<Equipment Unit D>> As shown in Figure 2, equipment unit D is a structure in which a drive mechanism 20 and a storage mechanism 30 are connected by a guide mechanism 70, and is installed on the road surface 202 side of the hollow floor slab 201, and on the rear side (right side of the page) of the first support device 50a.

[0041] The drive mechanism 20 provides the wire saw 10 with a constant tension and high-speed rotational force, and as shown in Figure 1(b), it comprises a pulley guide 22 in an upright position and a lifting device 23 that moves up and down along the pulley guide 22. The lifting device 23 is also equipped with a drive pulley 21 that causes the wire saw 10 to travel in a circular motion and a drive unit 24 that drives the drive pulley 21.

[0042] The drive pulley 21 rotates vertically, thereby imparting high-speed rotational force to the wire saw 10 that is wrapped around it. In addition, tension can be applied to the wire saw 10 by moving up and down along the pulley guide 22 via the lifting device 23.

[0043] As shown in Figure 2, the storage mechanism 30 stores the excess length of the wire saw 10 while maintaining a constant tension. It also extends the wire saw 10 when the cutting of the hollow floor slab 201 progresses and the first and second travel devices 40a and 40b move forward, as shown in Figure 4. The storage mechanism 30 can employ any structure as long as it has these functions, but in this embodiment, it employs first and second guide pulleys 32 and 33 that rotate vertically, and a pulley holder 31 in an upright position that supports them.

[0044] As shown in Figure 2, the guide mechanism 70 includes a beam-shaped connecting member 76 and is provided to connect the lower vicinity of the columnar pulley holder 31 that constitutes the storage mechanism 30 and the pulley guide 22 that constitutes the drive mechanism 20. The guide mechanism 70 also includes first to fifth guide pulleys 71 to 75 around which the wire saw 10 is routed, and these are installed on the connecting member 76 so as to be able to rotate vertically. As a result, the wire saw 10 is positioned to be able to travel in a circular motion within a vertical plane within the equipment unit D.

[0045] Specifically, the first guide pulley 71 guides the wire saw 10 between the first support device 50a and the storage mechanism 30. The second to fourth guide pulleys 72 to 74 guide the wire saw 10 between the storage mechanism 30 and the drive mechanism 20. The fifth guide pulley 74 guides the wire saw 10 between the drive mechanism 20 and the storage mechanism 30.

[0046] The equipment unit D having the above configuration is supported, for example, on the road surface 202 side of the hollow slab 201 via a support mechanism 80. The support mechanism 80 has a configuration similar to that used when installing the guide support 62 for the running rail 60 on the hollow slab 201.

[0047] ≪≪Cutting method for concrete floor slabs using a cutting device≫≫ The cutting device 100 having the above configuration is a device for forming a cut surface C having a width in the direction of the slab thickness W on a hollow slab 201, as shown in Figure 4. The procedure for forming a cut surface C on a hollow slab 201 using the cutting device 100 will be described below.

[0048] First, as shown in Figure 2, the equipment unit D is positioned on the road surface 202 side of the hollow floor slab 201 via the support mechanism 80. The equipment unit D consists of a drive mechanism 20, a storage mechanism 30, and a guide mechanism 70, which are pre-assembled and transported to the site, then installed via the support mechanism 80. Alternatively, these components may be transported to the construction site individually and assembled on the support mechanism 80 during installation.

[0049] Before, during, or simultaneously with the above work, a pair of running rails 60 are installed on the road surface 202 side and the underside 203 side of the hollow slab 201 via the support mechanism 80. Then, the first and second running devices 40a, 40b and the first and second support devices 50a, 50b are attached to the guide section 61 that constitutes the running rails 60. When installing the pair of running rails 60, for example, planned cutting lines L1 and L2 corresponding to the planned formation positions of the cut surface C are marked on the road surface 202 and the underside 203 of the hollow slab 201.

[0050] Then, as the first and second traveling devices 40a and 40b travel, a pair of traveling rails 60 are positioned so that the wire saw 10 cuts the hollow slab 201 along the planned cutting lines L1 and L2. In addition, a pair of insertion holes 204 parallel to the slab thickness W are placed at intervals in the hollow slab 201 at the starting position of the cutting operation.

[0051] Next, the wire saw 10 is inserted into each of the paired insertion holes 204 and then wrapped around the various pulleys provided on the equipment unit D, the first and second traveling devices 40a, 40b, and the first and second support devices 50a, 50b to assemble the cutting device 100. The relationship between the wire saw 10 and the various pulleys that guide it is as described above.

[0052] Once these assembly operations are complete, the drive mechanism 20 in the equipment unit D is activated to apply high-speed rotational force so that the wire saw 10 can travel in a circular motion. Then, as described above, the wire saw 10 is sent back to the equipment unit D via the first support device 50a, the first and second traveling devices 40a and 40b, the second support device 50b, and then via the first support device 50a.

[0053] As described above, with the wire saw 10 moving in a circular motion, the first and second traveling devices 40a and 40b are moved in parallel. Then, as shown in Figure 4, as the wire saw 10 moves in a circular motion, it is pressed against the position where the cut surface C will be formed inside the hollow slab 201 in a position parallel to the slab thickness W between the first and second traveling devices 40a and 40b. In this state, if the first and second traveling devices 40a and 40b are moved continuously, the wire saw 10 moves along the planned cutting lines L1 and L2 and cuts the hollow slab 201.

[0054] As a result, even if the hollow slab 201 is in the form of a thin plate or a layer, a cut surface C having a width from the road surface 202 side to the underside 203 side can be continuously formed in the direction of travel of the first and second traveling devices 40a and 40b in a single cutting operation, without imposing any limitations on the slab thickness W.

[0055] Furthermore, since the cutting direction of the wire saw 10 is controlled by the first and second traveling devices 40a and 40b that travel along the traveling rail 60, the phenomenon of deviating from the planned cutting lines L1 and L2 can be avoided. Therefore, the work of correcting the cutting direction of the wire saw 10 in the middle of the cutting operation can be omitted, and a smooth cut surface C with few irregularities can be easily formed by precisely aligning the cutting direction of the wire saw 10 with the planned cutting lines L1 and L2.

[0056] As the process of forming the cut surface C progresses, the drive pulley 21 moves along the pulley guide 22, and the wire saw 10 is fed out from the equipment unit D. When the drive pulley 21 moves to the lower end of the pulley guide 22, it is moved to the upper end while the excess length of the wire saw 10 is fed out from the storage mechanism 30. By repeating this process, a cut surface C having a desired length in the bridge axis direction can be formed on the hollow deck slab 201.

[0057] The cutting surface formation process is stopped when the excess length of the wire saw 10 stored in the storage mechanism 30 has been fully extended. If the cutting surface formation process is to be continued, the cutting device 100 is moved to the next position. If the cutting surface formation process is to be completed, the cutting device 100 is removed.

[0058] As described above, the hollow slab 201 cut in this way has a smooth cut surface C with minimal irregularities. This reduces the phenomenon of friction between the cut portion of the hollow slab 201 and the remaining hollow slab 201 when lifting the cut portion after the cutting work is completed, thereby improving the efficiency of the removal work. In addition, the cutting speed of the hollow slab 201 can be maintained at a normal speed, so there is no disruption to the construction period. Therefore, adopting the cutting device 100 for bridge deck replacement work can contribute to improved work efficiency and a reduction in the overall construction period.

[0059] Furthermore, since the cutting direction of the wire saw 10 can precisely align with the planned cutting lines L1 and L2 to form a cut surface C, it is possible to set a narrow design margin to be secured along the planned cutting lines L1 and L2, taking into account the possibility that the wire saw 10 may deviate from the planned cutting lines L1 and L2. Therefore, for example, when the half-section deck replacement method is adopted for deck replacement work on a hollow deck bridge 200, it is possible to provide a cut surface C in the hollow deck 201 near the restriction line set between the bridge and the lanes in use.

[0060] Furthermore, the half-section deck replacement method is a construction method that allows for deck replacement while restricting lanes rather than closing the road. Specifically, it involves cutting the existing deck to be replaced into two halves, one for the driving lane and the other for the passing lane. Then, by restricting lanes, the existing deck is removed from each half and replaced with a new deck.

[0061] The cutting device 100 and concrete member cutting method of the present invention are not limited to the above embodiments, and various modifications are possible without departing from the spirit of the present invention.

[0062] <<<Other examples of equipment unit D>>> For example, in this embodiment, the equipment unit D is placed on the road surface 202 side of the hollow slab 201, but as shown in Figure 5, it may also be placed on the lower surface 203 side of the hollow slab 201. This allows the cutting work to proceed while securing a workspace on the upper surface side of the hollow slab 201.

[0063] In this case, the 11th and 12th driven pulleys 57 and 58, which rotate vertically, are added to the second support device 50b to guide the wire saw 10 between the second traveling device 40b and the equipment unit D. In addition, the first support device 50a uses the 3rd and 10th driven pulleys 53 and 56 to guide the wire saw 10 between the equipment unit D and the first traveling device 40a.

[0064] Furthermore, the equipment unit D may be positioned not only in an upright position as shown in Figure 4 or a hanging position as shown in Figure 5 relative to the hollow floor slab 201, but also in a reclined position parallel to the hollow floor slab 201. In this case, the various pulleys provided on the equipment unit D will rotate horizontally. Therefore, it is preferable to provide a direction-changing pulley between the first and second support devices 50a and 50b and the equipment unit D, which can change the extension direction of the wire saw 10 from horizontal to vertical or from vertical to horizontal.

[0065] Furthermore, in both Figures 4 and 5, the drive mechanism 20 and the storage mechanism 30 are housed together in the equipment unit D, but one of them may be provided on the road surface 202 side of the hollow floor slab 201 and the other on the lower surface 203 side, for example.

[0066] <<Other examples of the movable body 46 and the feeding device 47>> Furthermore, Figure 3 shows an example where the first and second traveling devices 40a and 40b employ a mobile body 46 and a feeder device 47 as self-propelled traveling means. However, any self-propelled traveling means may be used, and the traveling means may also be towed.

[0067] For example, as shown in Figure 6, the towing wire 410 may be attached to the first and second travel devices 40a and 40b, and the wire may be wound up on a wire reel 400 to move the first and second travel devices 40a and 40b along the travel rail 60. Alternatively, the first and second travel devices 40a and 40b may be towed using an extendable device such as a hydraulic jack.

[0068] Furthermore, the first and second traveling devices 40a and 40b may be configured to move without using the traveling rails 60. For example, a traveling body may be provided, along with equipment that enables remote operation, such as a GNSS antenna, controller, various sensors, cameras, and receivers. In this way, the first and second traveling devices 40a and 40b can be driven remotely along pre-set planned cutting lines L1 and L2 to form the desired cutting surface C. Thus, by adopting so-called ICT construction, cutting work can be easily carried out even when the planned location for forming the cutting surface C is narrow or in a dangerous environment.

[0069] <<<Other examples of the first and second support devices 50a and 50b>>> Alternatively, instead of supporting the first support device 50a on the running rail 60, it may be supported on the connecting member 76 of the guide mechanism 70 provided on the equipment unit D, as shown in Figure 7. In this case, the first support device 50a is provided with at least the first and tenth driven pulleys 51 and 56. The first driven pulley 51 guides the wire saw 10 between the storage mechanism 30 and the first running device 40a, and the tenth driven pulley 56 guides the wire saw 10 between the second support device 50b and the storage mechanism 30.

[0070] On the other hand, the first and second support devices 50a and 50b may be provided with a traveling mechanism, and they may be configured to travel along the guide portion 61 of the traveling rail 60. In this way, the uncut portion N between the pair of insertion holes 204 can be cut, as shown in Figure 6. Any traveling mechanism can be provided on the first and second support devices 50a and 50b; for example, a moving body 46 and a feeding device 47 mounted on the first and second traveling devices 40a and 40b can be provided.

[0071] <<<Other examples of the entire cutting device 100>>> Figures 1(a) and 1(b) illustrate the case where the cut surface C is formed parallel to the thickness W of the hollow floor slab 201. Figure 4 also shows an example where the end CE of the cut surface C is formed parallel to the insertion hole 204, and the cut surface C is formed in a rectangular shape. However, the orientation and shape of the cut surface C are not limited in any way.

[0072] For example, as shown in Figure 8(a), if an obstacle O exists on the planned cutting line L2 on the lower surface 203 side of the hollow floor slab 201, the positions of the first and second traveling devices 40a and 40b are shifted vertically as they travel. This makes it possible to form a trapezoidal cutting surface C with an inclined end that avoids the obstacle O.

[0073] On the other hand, as shown in Figure 8(b), if there is an obstacle O extending in the direction of the bridge axis on the road surface 202 of the hollow slab 201, the cut surface C can be tilted perpendicular to the bridge axis to create an inclined position. In this case, the installation positions of the pair of running rails 60 located on the road surface 202 side and the underside 203 side of the hollow slab 201 are shifted perpendicular to the bridge axis. Then, the various pulleys provided on the first and second running devices 40a, 40b, the first and second support devices 50a, 50b, and the equipment unit D are tilted according to the planned inclination angle with respect to the cut surface C.

[0074] In this way, the cutting device 100 can tilt the cutting surface C at various angles, including the vertical, by tilting the various pulleys provided on the first and second traveling devices 40a, 40b, the first and second support devices 50a, 50b, and the equipment unit D, respectively, to a desired inclination angle with respect to the horizontal plane.

[0075] Furthermore, in this embodiment, the first and second traveling devices 40a and 40b are made to travel in a straight line, but this is not necessarily the only option. For example, the planned cutting lines L1 and L2 set on the road surface 202 side and the underside 203 side of the hollow slab 201 can be made into arcs or curved surfaces, and the first and second traveling devices 40a and 40b can travel along these lines. In this way, the cutting surface C can be formed into an arc or a curved surface, making it possible to freely form the desired cutting surface C. [Explanation of symbols]

[0076] 100 cutting equipment 10 Wire Saws 20 Drive mechanism 21 Drive pulley 22 Pulley Guide 23 Lifting device 24 Drive unit 30 Storage Mechanisms 31 Pulley holder 32 First guide pulley 33. Second guide pulley 40a First Traveling Device 40b Second Travel Device 41-44 4th-7th driven pulleys 45 Pulley mount 46. ​​Mobile vehicle (means of transport) 47 Feeding device (traveling means) 50a 1st support device 50b Second support device 51-53 1st-3rd driven pulleys 54-56 8th-10th driven pulleys 57-58 11th-12th driven pulleys 59 Pulley stand 60 Rails 61 Guide section 62 Guide support 70 Information Mechanism 71-75 Guide Pulleys 1-5 76 Connecting member 80 Support mechanism 81 Column base 82 mounting base 83 Anchor member 200 Hollow slab bridge (bridge) 201 Hollow floor slab (concrete member) 202 Road surface (surface) 203 Bottom surface (back surface) 204 Through hole C Cut surface CE termination N Uncut part W Floor slab thickness (member thickness) L1, L2 Planned cutting lines D Equipment Unit P protective regimen O Obstacle

Claims

1. A cutting device for forming a cut surface on a concrete member having a width in the thickness direction from the surface to the back surface, An endless wire saw that penetrates the concrete member in the thickness direction of the member, A drive mechanism for making the wire saw move in a circular motion, A storage mechanism for storing the excess length of the wire saw, Multiple driven pulleys around which the wire saw is routed, A pair of support devices and a pair of traveling devices that support the driven pulley, The concrete member comprises a pair of running rails installed on the front and back surfaces of the concrete member via a support mechanism and aligned with the direction in which the cut surface is formed, The pair of support devices are arranged on the front and back sides of the concrete member. A cutting device characterized in that each pair of the aforementioned traveling devices is supported by a pair of the aforementioned traveling rails installed on the surface and back surface of the concrete member.

2. In the cutting device according to Claim 1, A cutting device characterized in that the aforementioned traveling device is equipped with a self-propelled traveling means.

3. In the cutting device according to Claim 1, A cutting device characterized in that the aforementioned traveling device is driven by a towing-type traveling means.

4. In the cutting apparatus according to claim 1, The concrete member is a concrete deck or deck bridge that constitutes a bridge. A cutting device characterized by the following.

5. A method for cutting concrete members using the cutting device described in claim 1, By running the pair of running devices supported by the pair of running rails installed on the front and back surfaces of the concrete member along the direction in which the cut surface is formed, the wire saw that penetrates the concrete member in the thickness direction between the running devices is pressed against the concrete member, The concrete is characterized by the wire saw being driven in a circular motion via the drive mechanism. Cutting method for structural members.

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