Cutter Machine

Abstract

To provide a cutter machine capable of freely cutting curves on a work surface. [Solution] A cutter machine having a base 3 located above a work surface C that is the subject of cutting work, a drive source 5 mounted on the base 3, a running body 4 mounted on the base 3 and moving the base 3 relative to the work surface C, and a rotary blade 2 that rotates when power from the drive source 5 is transmitted to cut the work surface C, and is equipped with a steering unit that can steer the rotary blade 2 so that it is tilted in the fore-and-aft direction on the base 3.

Description

[Technical field]

[0001] The present invention relates to a cutter machine that cuts a paved surface made of, for example, asphalt, using a rotary blade. [Background technology]

[0002] Conventionally, as this type of cutter machine, there exists a cutter machine that cuts a paved surface, which is a work target surface formed from asphalt, etc., with a rotary blade. However, such a cutter machine can only cut the paved surface in a straight line.

[0003] Meanwhile, Patent Document 1 discloses a cutter machine capable of cutting a paved surface, which is a work target surface, into a curved shape. The cutter machine described in Patent Document 1 is configured with a carriage provided with rotatable wheels. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-138127 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the cutter machine described in Patent Document 1, although the carriage is provided with swivelable wheels, the front-rear direction of the rotary blade is fixed relative to the carriage, and the wheels to which no driving force is applied are rotated to change the direction of the carriage accordingly. Therefore, the cutter machine described in Patent Document 1 is not maneuverable, and therefore there is a limit to cutting curves with a desired curvature.

[0006] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a cutting machine that can freely cut curves on the surface of a work piece. [Means for solving the problem]

[0007] The cutter machine of the present invention has a base located above a work surface which is the subject of cutting work, a drive source mounted on the base, a running body mounted on the base and moving the base relative to the work surface, and a rotary blade which rotates when power from the drive source is transmitted to cut the work surface, and is configured with a steering unit capable of steering the rotary blade so as to tilt it in the fore-and-aft direction on the base.

[0008] According to the above-mentioned cutter machine, when cutting the work surface with a rotary blade to which power from a drive source is transmitted, the base is positioned above the work surface and the base is caused to run on the running body. The steering section can steer the rotary blade, which is the part that performs the cutting, so that it is inclined relative to the fore-and-aft direction of the base, and the rotary blade can cut the work surface with a curvature that matches the degree of steering inclination.

[0009] The cutter machine of the present invention is provided with a joint that transmits power from the driving source to the rotary blade, the driving source being fixed to the base, and the joint can be configured to transmit the power in response to changes in the inclination of the rotary blade caused by the steering unit.

[0010] According to the above-mentioned cutter machine, even if the rotating blade is tilted in the fore-and-aft direction on the base, the joint that transmits power from the drive source to the rotating blade transmits power in accordance with the change in the inclination of the rotating blade caused by the steering unit, so that the power transmission is smooth.

[0011] In the cutter machine of the present invention, the running bodies are provided in a pair in the width direction of the base, and of the pair, each of the running bodies on one side and the running body on the other side may be configured to be capable of moving up and down separately and to be able to maintain the up and down moved state.

[0012] In the above-mentioned cutter machine, a pair of running bodies are provided in the width direction of the base, and the running bodies can move up and down relative to the base and maintain that position, so that each running body can follow the slope and unevenness of the work surface.

[0013] The cutter machine of the present invention is provided with a pair of support rollers arranged to sandwich the rotary blade in the width direction, and the pair of support rollers abut against the work surface while cutting is being performed by the rotary blade, and each of the pair of support rollers, one side of the support roller and the other side of the support roller, can move up and down separately and can be configured to maintain the up and down moved state.

[0014] With the above-mentioned cutter machine, when cutting the work surface with a rotary blade, the cutting can be carried out stably by a pair of support rollers that contact the work surface while the rotary blade is cutting, and when the base runs, it can follow the slope and unevenness of the work surface by combining this with the up and down movement of the running body. Effect of the Invention

[0015] According to the cutter machine of the present invention, the steering unit is capable of steering the rotary blade, which is the part that performs the cutting, so that it is inclined relative to the front-to-rear direction of the base, so that curved cuts can be freely performed on the work surface. [Brief description of the drawings]

[0016] [Figure 1] 1 is a front and rear perspective view of a cutter machine showing one embodiment of the present invention; FIG. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] A cutter machine 1 according to one embodiment of the present invention will be described below with reference to Figures 1 to 8. The cutter machine 1 is a vehicle configured to be able to cut straight lines or freely curved lines on a work surface (e.g., a paved surface of asphalt or concrete) C with a rotary blade (cutting blade) 2.

[0018] The cutter machine 1 comprises a base 3, running bodies 4, 4 that run and move the base 3, loads such as a drive source 5 placed on the upper surface of the base 3, and a steering unit 6 arranged in front of the base 3.

[0019] The base 3 is disposed so as to be located above a work target surface C which is the target of the cutting operation. In this embodiment, the base 3 is formed in a rectangular frame shape that is long in the front-rear direction of the vehicle, and includes a pair of parallel reinforcing plates 3A, 3A spaced apart in the front-rear direction, as shown in Figs. 6 and 7.

[0020] The running bodies 4, 4 are located at the rear of the base 3 and are a pair of wheels arranged on the outer side of the base 3 in the vehicle width direction. These running bodies 4, 4 are configured to be able to rotate forward and backward with respect to the base 3 by respective support shafts 4a, 4a along the vehicle width direction, and are also configured to be able to move up and down with respect to the base 3. In this embodiment, the range of up and down movement is 100 mm. Although the running bodies 4, 4 are wheels, they may also be caterpillars (registered trademark).

[0021] Here, the traveling mechanism 4A that allows the traveling bodies 4, 4 to move up and down will be described. The traveling mechanism 4A has a traveling body gear box 7 shown in Fig. 7 and Fig. 8, mounting members 8, 8 shown in Fig. 1 and Fig. 2, and traveling body cylinder devices 9, 9. As shown in Fig. 7, the traveling body gear box 7 is disposed below the center in the vehicle width direction of the base 3, and a motor 10 that drives the gears in the traveling body gear box 7 is disposed adjacent to the traveling body gear box 7. The traveling body gear box 7 is disposed on both outer sides in the vehicle width direction and is provided with drive shafts 11, 11 connected to the gears, and the drive shafts 11, 11 are driven by the power generated by the motor 10.

[0022] The mounting members 8, 8 are configured to connect the drive shafts 11, 11 and the support shafts 4a, 4a. Although not shown, the drive shafts 11, 11 and the support shafts 4a, 4a are connected by a chain or the like, and when the drive shafts 11, 11 are driven, the running bodies 4, 4 rotate around the support shafts 4a, 4a.

[0023] 1 and 2, the mounting members 8, 8 are substantially L-shaped and have extensions 12, 12 extending in the vehicle front-rear direction and protruding parts 13, 13 protruding upward from the front ends of the extensions 12, 12. The support shafts 4a, 4a are attached to the rear ends of the extensions 12, 12, and the outer parts of the drive shafts 11, 11 in the vehicle width direction are connected to the boundaries of the mounting members 8, 8 between the extensions 12, 12 and the protruding parts 13, 13.

[0024] The running body cylinder devices 9, 9 are disposed between the base 3 and the mounting members 8, 8. Specifically, the base of the cylinder 9a of the running body cylinder devices 9, 9 is connected to the side surface 3a of the base 3, and the tip of the rod 9b of the running body cylinder devices 9, 9 is connected to the protrusions 13, 13 of the mounting members 8, 8, such that the running body cylinder devices 9, 9 are freely extendable and retractable in the horizontal direction relative to the base 3.

[0025] The running body cylinder devices 9,9 are hydraulic cylinders, and by making them extendable, the running bodies 4,4 descend when the rod 9b extends, and ascend when the rod 9b contracts. With this configuration, the running bodies 4,4 swing vertically about the drive shafts 11,11 relative to the base 3, and the running bodies 4,4 can be maintained in their up-down state. Each of the pair of running bodies 4,4 is configured to be able to move up and down separately by the respective running body cylinder devices 9,9 relative to the base 3.

[0026] The driving source 5, which is a mounted object, is configured to drive the rotary blade 2, and is disposed and fixed at the center of the base 3 in the vehicle width direction. One of the L-shaped angles 14, 14 is attached to both sides of the driving source 5 in the vehicle width direction, and the other of the angles 14, 14 is attached to the upper surface 3b of the base 3, and the driving source 5 is supported and fixed to the base 3. In this embodiment, an internal combustion engine, specifically a diesel engine, is used as the driving source 5. The driving source 5 is provided with a driving joint rod 15 extending forward of the vehicle for transmitting the power generated by the driving source 5 to the front of the vehicle. The power of the driving source 5 is also supplied to a generator (not shown), stored in a battery, and also supplied to the motor 10. In addition, a driving source radiator 16 is disposed behind the driving source 5 as a mounted object. In addition, although not shown, a gyro sensor is mounted on the base 3 to detect the attitude of the base 3, and the attitude of the base 3 is detected by this gyro sensor.

[0027] The steering unit 6 is configured to enable steering of the rotary blade 2 so as to tilt (i.e., swing) relative to the front-rear direction of the base 3. Prior to describing the configuration of the steering unit 6, a steering gear device 17, a drive gear 18, and a driven gear 19 for enabling the steering unit 6 to be steered will be described.

[0028] The steering gear device 17 has a steering gear device main body 20 and a worm gear as a gear mechanism built in the steering gear device main body 20. The steering gear device 17 also has a motor 17A for driving the drive gear 18. The steering gear device main body 20 is installed on a lower plate member 21 arranged on the vehicle front side of the base 3. A central axis (not shown) of a worm wheel of the worm gear protrudes downward from the steering gear device main body 20. The worm gear is driven by the output of the motor 17A. The lower plate member 21 is a rectangular member in a plan view.

[0029] The driving gear (pinion gear) 18 is disposed between the lower plate member 21 and the steering gear device main body 20. As shown in Fig. 6, the central axis 18a of the driving gear 18 is coaxial with the central axis of the worm wheel, and the central axis 18a of the driving gear 18 passes through the lower plate member 21 from top to bottom, and the driving gear 18 is supported so as to be rotatable about the central axis 18a.

[0030] 6, the driven gear (pinion gear) 19 is configured to mesh with the drive gear 18. The driven gear 19 is formed to have a larger diameter than the drive gear 18, and is disposed adjacent to the drive gear 18 on the lower plate member 21. The central axis 19a of the driven gear 19 is disposed parallel to the central axis 18a of the drive gear 18.

[0031] The steering gear device 17, lower plate member 21, drive gear 18, and driven gear 19 are immovable members that do not move up and down or left and right relative to the base 3, but the drive gear 18 is configured to rotate around a central axis 18a and the driven gear 19 is configured to rotate around a central axis 19a.

[0032] Next, the steering unit 6 will be described. The steering unit 6 is configured to include a gear box 22 for the cutting blade, a joint 23, a transmission gear (the reference numerals will be explained later), a rotary blade 2, a support roller device 24, and vertically movable cylinder devices 25, 25. Such a steering unit 6 can be steered by a remote control (not shown) (hereinafter, referred to as a remote control), and therefore the steering unit 6 includes a control unit that receives input from the remote control. Specifically, the remote control is configured to operate the motor 17A.

[0033] As described above, the steering unit 6 is configured to be able to steer the rotary blade 2 so as to incline with respect to the front-rear direction of the base 3. For this reason, the cutting blade gear box 22, the joint 23 (front member), the transmission gear, the rotary blade 2, the support roller device 24, and the vertical movement cylinder devices 25, 25 are configured to be able to steer with respect to the front-rear direction of the base 3.

[0034] The cutting blade gear box 22 is provided in front of the drive joint rod 15. The cutting blade gear box 22 has a cutting blade gear box body 22A and a bevel gear as a gear mechanism built into the cutting blade gear box body 22A. As shown in Fig. 6, the drive shaft 22a of the bevel gear is aligned horizontally and protrudes from the side of the cutting blade gear box body 22A.

[0035] The cutting blade gear box body 22A is disposed above the lower plate member 21 and is installed on an upper plate member 26 that extends to the front of the lower plate member 21. The upper plate member 26 is a rectangular member in a plan view and is disposed parallel to the lower plate member 21. The upper end of the central shaft 19a of the driven gear 19 is inserted into the upper plate member 26 and fixed thereto.

[0036] The joint 23 is configured to be connected to the front of the drive joint rod 15 and the bevel gear of the cutting blade gear box body 22A. In this embodiment, the joint 23 is a universal joint. The central axis 19a of the driven gear 19 and the center of the joint 23 are aligned in the vertical direction.

[0037] As described above, the upper end of the central shaft 19a of the driven gear 19 is fixed to the upper plate member 26, and the joint 23 is connected to the drive joint rod 15 and the cutting blade gear box body 22A (bevel gear), so that the upper plate member 26 is configured to swing relative to the base 3 via the joint 23 as the worm gear of the steering gear device body 20 is driven. In this embodiment, the upper plate member 26 is configured to rotate 120° left and right via the joint 23.

[0038] The transmission gear is composed of multiple (four in this embodiment) pinion gears arranged in the vertical direction. Assuming that the transmission gears are a first transmission gear 27, a second transmission gear 28, a third transmission gear 29, and a fourth transmission gear 30 as shown in Fig. 1, the central axes 27a, 28a, 29a, and 30a of these transmission gears are arranged in the horizontal direction so as to be aligned with the drive shaft 22a of the bevel gear. In other words, the central axis 27a of the first transmission gear 27 is coaxial with the drive shaft 22a of the bevel gear, that is, the first transmission gear 27 is a drive gear. The second transmission gear 28 meshes with the first transmission gear 27 below the first transmission gear 27, the third transmission gear 29 meshes with the second transmission gear 28 below the second transmission gear 28, and the fourth transmission gear 30 meshes with the third transmission gear 29 below the third transmission gear 29. The second transmission gear 28, the third transmission gear 29 and the fourth transmission gear 30 are driven gears that are driven to rotate by the first transmission gear 27.

[0039] On the other hand, the central shafts 28a, 29a, 30a of the second transmission gear 28, the third transmission gear 29, and the fourth transmission gear 30 are supported by a vertical plate member 31 fixed so as to hang down from the vehicle width direction end of the upper plate member 26, as shown in Fig. 1, and the first transmission gear 27, the second transmission gear 28, the third transmission gear 29, and the fourth transmission gear 30 are made smaller in diameter as the gears are arranged lower. In other words, the rotation about the central shaft 30a of the fourth transmission gear 30 is configured to accelerate the rotation about the central shaft 27a of the first transmission gear 27. The vertical plate member 31 is a plate-shaped member when viewed from the front, and a protruding plate portion 32 is formed in the middle in the vertical direction so as to protrude forward integrally from the vertical plate member 31.

[0040] The rotary blade 2 is a blade that is rotated by the power generated by the drive source 5 being transmitted via the drive joint rod 15, the joint 23, the cutting blade gear box 22, and the transmission gear, and cuts the work surface C. In this embodiment, the rotary blade 2 is a diamond cutter blade. The rotary blade 2 has a smaller diameter than conventional rotary blades. This is because such a small diameter is preferable because it allows the curvature of the curved cut to be larger. In this embodiment, the rotary blade 2 has a diameter of 125 mm. However, it can also be 100 mm to 250 mm.

[0041] As shown in Fig. 5, the central axis 2a of the rotary blade 2 is parallel to the central axis 27a of the first transmission gear 27 and is coaxial with the central axis 30a of the fourth transmission gear 30. The rotary blade 2 is a cantilever-type blade supported by the central axis 2a, and the rotary blade 2 cannot move up and down. Such a rotary blade 2 is disposed in front of and below the base 3, in the central region of the base 3 in the vehicle width direction. Since the rotary blade 2 is a diamond cutter blade, only the blade body 2b centered on the central axis 2a can cut the work surface C.

[0042] In this embodiment, the mechanism for rotating the rotary blade 2 around the central axis 2a includes a drive source 5, a drive joint rod 15, a joint 23, a gear box 22 for the cutting blade, and a transmission gear.

[0043] The support roller devices 24 are disposed in pair to sandwich the rotary blade 2 in the vehicle width direction of the base 3 so as to come into contact with the work surface C during cutting by the rotary blade 2. The support roller devices 24 are configured to be able to move up and down independently of the rotary blade 2.

[0044] Specifically, as shown in Fig. 4, the support roller device 24 includes support rollers 33, 33 and mounting bodies 34, 34. The support rollers 33, 33 are disposed adjacent to the rotary blade 2, and are capable of rotating about a horizontal axis while abutting against the work surface C.

[0045] The support rollers 33, 33 are formed in an annular shape, and an axial space 33A is formed in the center. The axial space 33A is a circular hole when viewed from the front, and the end of the central shaft 2a of the rotary blade 2 in the vehicle width direction can abut against the peripheral surface 33a of the axial space 33A.

[0046] The mounting bodies 34, 34 are members that support the support rollers 33, 33 so that they rotate around a horizontal axis. The mounting bodies 34, 34 have an insertion space 34A that is connected to the axial space 33A from the lateral direction, and the insertion space 34A has the same diameter as the axial space 33A. One of the mounting bodies 34, 34 is disposed on the inner side of the vertical plate member 31 in the vehicle width direction as shown in FIG. 1. The other mounting body 34 is disposed parallel to the one mounting body 34. Both mounting bodies 34, 34 are formed in a plate shape that extends forward with respect to the vertical plate member 31, and the insertion space 34A is formed on the rear side of the mounting bodies 34, 34.

[0047] The intermediate portion of the mounting body 34, 34 in the front-rear direction is supported by the protruding plate portion 32 of the vertical plate member 31. That is, the protruding plate portion 32 and the intermediate portion of the mounting body 34, 34 in the front-rear direction are supported by the horizontal shaft 35 that is parallel to the drive shaft 22a of the bevel gear and disposed below the drive shaft 22a. However, as described above, the protruding plate portion 32 is fixed to the upper plate member 26. Therefore, in this case, the mounting body 34, 34 is configured to be rotatable around the horizontal shaft 35. In addition, in order to make the mounting body 34, 34 rotatable around the horizontal shaft 35, an auxiliary plate 36 is formed hanging down from the center of the upper plate member 26 in the vehicle width direction, and the horizontal shaft 35 is also inserted through the auxiliary plate 36. The auxiliary plate 36 is disposed in the center of the mounting body 34, 34 in the vehicle width direction in order to make the mounting body 34, 34 rotatable around the horizontal shaft 35.

[0048] As shown in Fig. 4, the vertical movement cylinder devices 25, 25 are configured to move the mounting bodies 34, 34 up and down around a horizontal axis 35. The vertical movement cylinder devices 25, 25 are disposed between the mounting bodies 34, 34 and the upper plate member 26. Specifically, the bases of the cylinders 25a, 25a of the vertical movement cylinder devices 25, 25 are supported by a cylinder holding portion 37 extended forward from the upper plate member 26, and the ends of the rods 25b, 25b of the vertical movement cylinder devices 25, 25 are supported by the front parts of the mounting bodies 34, 34, so that the vertical movement cylinder devices 25, 25 can freely expand and contract in the vertical direction relative to the base 3.

[0049] The up-down movement cylinder devices 25, 25 are hydraulic cylinders, and by making them extendable, when the rods 25b, 25b extend, the support rollers 33, 33 rise, and when the rods 25b, 25b extend, the support rollers 33, 33 fall. With this configuration, the support rollers 33, 33 can be maintained in a vertically moved state.

[0050] 3 and 5, the cylinder holding portion 37 includes a rising plate 38 rising from the front end of the upper plate member 26, and a protruding plate 39 protruding forward from the center of the rising plate 38 in the vehicle width direction. The cylinders 25a, 25a of the vertically movable cylinder devices 25, 25 are supported by the protruding plate 39 so as to be rotatable about a horizontal shaft 40, and the ends of the rods 25b, 25b of the vertically movable cylinder devices 25, 25 are supported by the front parts of the mounting bodies 34, 34 so as to be rotatable about the horizontal shaft 40.

[0051] In the cutter machine 1, when it is not in use, the vertically movable cylinder devices 25, 25 are contracted and the mounting bodies 34, 34 rotate around the horizontal shaft 35, the mounting bodies 34, 34 sandwich the rotary blade 2 on both sides in the vehicle width direction, and the central axis 2a of the rotary blade 2 is in the axial space 33A, and the outer circumferential surfaces of the support rollers 33, 33 contact the work target surface C, as shown in Fig. 4. In other words, the outer circumferential surface of the rotary blade 2 does not contact the work target surface C, and the rotary blade 2 is not cutting the work target surface C.

[0052] We will now explain the usage state of the cutter machine 1. In other words, the usage state is a state in which the rotary blade 2 is used to cut straight lines or curved lines freely on the work surface C depending on the situation and purpose of the work site.

[0053] When cutting a work surface C in a straight line with the rotary blade 2, the worker moves the cutter machine 1 to the work surface C using the traveling bodies 4, 4, and operates the remote control to drive the vertical movement cylinder devices 25, 25 to raise the support rollers 33, 33, thereby exposing the rotary blade 2 to the support rollers 33, 33. In this state, as shown in Fig. 3, the central axis 2a of the rotary blade 2 is in contact with the peripheral surface 33a of the axial space 33A.

[0054] Then, the rotary blade 2 is placed on the work surface C, and the drive source 5 is turned ON. When the drive source 5 is turned ON, the drive force is transmitted to the rotary blade 2 via the drive joint rod 15, the joint 23, the cutting blade gear box 22, and the transmission gear, and the rotary blade 2 rotates around the central axis 2a.

[0055] When cutting the work surface C in a straight line, the steering unit 6 is not operated relative to the base 3. Instead, for example, the work surface C is inked in advance, the rotary blade 2 is moved along the inking, and the base 3 is operated in the direction of travel with the running bodies 4, 4, so that the work surface C can be cut by the rotary blade 2.

[0056] To cut a curved line with the rotary blade 2, the worker operates the remote control to drive the vertical movement cylinder devices 25, 25 in the same way as when cutting a straight line, thereby exposing the rotary blade 2 to the support rollers 33, 33. In this state, the central shaft 2a of the rotary blade 2 abuts against the peripheral surface 33a of the shaft space 33A.

[0057] When curved cutting is performed by the rotary blade 2, the base 3 is supported by the traveling bodies 4, 4, and the steering unit 6 is steerable (rotatable) relative to the base 3. Specifically, the steering unit 6 is capable of rotating (turning) 120° left and right while transmitting power for cutting via the joint 23. Thus, the steering unit 6 can perform curved cutting H (see FIG. 7) by transmitting power from the drive source 5 to the base 3 in accordance with changes in the inclination of the rotary blade 2 via the joint 23. In other words, curved cutting H can be performed by the blade body 2b of the rotary blade 2 without having to consider the attitude of the base 3.

[0058] According to the cutter machine 1 of this embodiment, the steering unit 6 is capable of steering the rotary blade 2 so that it is inclined relative to the fore-and-aft direction of the base 3, so that the rotary blade 2 can cut the work surface C with a curvature that matches the degree of steering inclination.

[0059] Incidentally, each of the pair of running bodies 4, 4 is configured to be able to move up and down separately with respect to the base 3 by the respective running body cylinder devices 9, 9. The running body cylinder devices 9, 9 are controlled by operating the remote control, and the base 3 is provided with a gyro sensor for detecting its attitude, and the attitude of the base 3 is detected by the gyro sensor. In this way, the running bodies 4, 4 are provided as a pair in the width direction of the base 3, and by operating the remote control, the running bodies 4, 4 can move up and down with respect to the base 3 and maintain that state. Therefore, as shown by the virtual lines in FIG. 5, each of the running bodies 4, 4 can follow the inclination and unevenness of the work target surface C.

[0060] Furthermore, the up-down movement cylinder devices 25, 25 which move the support rollers 33, 33 of the support roller device 24 up and down are also operated by remote control. Therefore, when the rotary blade 2 cuts the work surface C, as shown by the imaginary lines in Fig. 5, the pair of support rollers 33, 33 abutting the work surface C can stably cut the work surface C while the rotary blade 2 is cutting, and when the base 3 travels, in combination with the up-down movement of the travelling bodies 4, 4, it is possible to follow the inclination and unevenness of the work surface C. Note that although the rotary blade 2 is used to cut the work surface C, it can also be used to form grooves in the surface of the work surface C.

[0061] The present invention can be modified in various ways without departing from the spirit and scope of the invention. The specific configurations of the various parts are not limited to the above-described embodiment.

[0062] In the above embodiment, the base 3 is moved in the travel direction by the running bodies 4, 4. However, the running bodies 4, 4 may be configured to travel rotatably by branching and transmitting the power generated by the drive source 5. Alternatively, the running bodies 4, 4 may be configured to be simply connected to the side surface 3a of the base 3 via the support shafts 4a, 4a.

[0063] In the above embodiment, when the rotary blade 2 cuts a curve on the work surface C, the cut is performed by remote control. However, when the rotary blade 2 cuts a curve, the worker may directly operate the steering unit 6 to cut the curve.

[0064] In the above embodiment, the rotary blade 2 can be rotated so as to follow the inking by detection using a sensor or a camera.

[0065] In the above embodiment, the central axis 2a of the rotary blade 2 is parallel to the central axis 27a of the first transmission gear 27. However, the rotary blade 2 may be configured to be tiltable with respect to a horizontal axis. In this case, the work surface C can be cut according to the tilt direction of the rotary blade 2.

[0066] In the above configuration, a steering rod can be provided to place the rotary blade 2 on the work surface C. The steering rod is fixed to the lower part of the upper plate member 26, for example, and extends forward. It is preferable that no parts constituting the cutter machine 1 are present around the front part of the steering rod.

[0067] In the above embodiment, a universal joint is used as the joint 23. However, as long as the steering unit 6 is configured to be steered, a joint that can rotate (tilt) horizontally, for example, may be used. Also, in the above embodiment, a diesel engine, an internal combustion engine, is used as the drive source 5. However, an engine may also be used as the drive source 5.

[0068] In the above embodiment, for safety reasons, the transmission gear may be covered with a cover attached to a predetermined location of the steering unit 6, or the blade body 2b of the rotary blade 2 may be covered so as to be exposed. The cutter machine 1 may also be provided with an emergency stop function in the event that the traveling bodies 4, 4 derail. In this case, for example, a lever may be provided on the steering unit 6, and the cutter machine 1 may be brought to an emergency stop by an operator operating the lever. [Explanation of symbols]

[0069] 1: cutter machine, 2: rotary blade, 2a: central shaft, 2b: blade body, 3: base, 4,4: running body, 4A: running mechanism, 4a: support shaft, 5: driving source, 6: steering section, 7: running body gear box, 8,8: mounting member, 9,9: running body cylinder device, 9a: cylinder, 9b: rod, 10: motor, 11,11: driving shaft, 12,12: extension, 13,13: protrusion, 14,14: angle, 15: driving joint rod, 16: driving source radiator, 17: steering gear device, 17A: motor, 18: driving gear, 18a: central shaft, 19: driven gear, 19a: central shaft, 20: steering gear device body, 21: lower plate member, 22 : Gear box for cutting blade, 22A: Gear box body for cutting blade, 22a: Drive shaft, 23: Joint, 24: Support roller device, 25, 25: Up-down movement cylinder device, 25a, 25a: Cylinder, 25b, 25b: Rod, 26: Upper plate member, 27: First transmission gear, 28: Second transmission gear, 29: Third transmission gear, 30: Fourth transmission gear, 31: Vertical plate member, 32: Protruding plate portion, 33, 33: Support roller, 33A: Shaft space, 33a: Circumferential surface, 34, 34: Mounting body, 34A: Insertion space, 35: Horizontal shaft, 36: Auxiliary plate, 37: Cylinder holding portion, 38: Upper plate, 39: Protruding plate, 40: Horizontal shaft, C: Working surface, H: Curved cutting

Claims

1. A base is located above a work surface that is the subject of a cutting operation; A drive source installed on the base; A traveling body that is installed on the base and moves the base relative to the work target surface; a rotary blade that rotates by transmitting power from the drive source to cut the work surface, and a steering unit that can steer the rotary blade so as to be inclined relative to the front-rear direction of the base; a coupling for transmitting power from the drive source to the rotary blade; The drive source is fixed to the base, A cutter machine characterized in that the joint transmits the power in response to a change in the inclination of the rotary blade caused by the steering unit.

2. The traveling body is provided in a pair in the width direction of the base, 2. The cutter machine according to claim 1, wherein each of the pair of running bodies, one of which is movable up and down and the other of which is movable up and down, can be maintained in a vertically moved state.

3. a pair of support rollers arranged to sandwich the rotary blade in the width direction, The pair of support rollers contact the work surface during cutting by the rotary blade, 3. The cutter machine according to claim 2, wherein each of the pair of support rollers, one of which is a support roller and the other of which is a support roller, is capable of moving up and down independently and is capable of maintaining a state in which it has moved up and down.

Images