JP6552279B2 - Road surface cutting machine and cutting method - Google Patents

Description

The present invention relates to a technique for cutting grooves at a predetermined interval on a road surface.

When a vehicle is traveling, it often approaches a road end or a center line and causes a contact accident. In order to prevent this, a technology that provides a certain unevenness (warning groove) in the traveling direction of the center of the road and the pavement at the end and gives attention to the driver of the vehicle on board by a sound and vibration (warning) Technology for building road surfaces) has been proposed. The technology includes various technologies such as a technology for forming irregularities on the surface of the material when constructing the road center line or side line, and a technology for pressing the groove mold when compacting the paving material in the new paving work. Suggestions have been made.

A groove forming machine (small road surface cutting machine) for moving a cutting device (cutter) up and down in order to create a fixed interval (groove) continuous to the road center / side end as a prior art for constructing a caution calling groove on an existing pavement surface ) Has been proposed.
In this prior art, a polygonal guide ring is provided to obtain a predetermined groove depth and pitch, and a mechanism for forming a warning groove by moving up and down while moving the cutting device by rotation of the guide ring is provided. ing.

Here, it is desirable that the warning groove has a plurality of variations in accordance with the design of the road.
However, in the related art, since the cutting device is intermittently brought into contact with the road surface by moving the machine itself forward and backward while using the polygonal guide ring, a constant interval determined by the polygon wheel size There is a problem that only the groove can be constructed.
In the above-described prior art using polygonal guide wheels, the guide wheels must be exchanged in order to change the spacing and depth of the alerting grooves within the work site. And it is very difficult to change a guide wheel during construction and to change the interval and the depth of the alerting groove.

As another conventional technique, a groove forming machine having a circular guide wheel has been proposed, and it is disclosed that a groove cutting position and a groove cutting depth are controlled in accordance with a travel distance (see Patent Document 1). However, the technology (Patent Document 1) does not specifically mention any control for changing the interval or depth of the alerting grooves.

Patent No. 4141706

The present invention has been proposed in view of the above-described problems of the prior art, and provides a road surface cutting machine and a road surface cutting method capable of arbitrarily changing the cutting pitch and depth of a warning groove even during construction. It is aimed.

The road surface cutting machine (100) of the present invention has a driving wheel (1) and a guide wheel (2) configured to be vertically movable, and includes a rotary cutting device (3: cutter drum) for cutting a road surface,
A travel distance detection device (4: for example, an encoder) that measures a travel distance and a rotary cutting device position detection device (5: a cutter drum position detection device: for example, a linear sensor) that detects the vertical position of the rotary cutting device (3). Have
Based on the detection result of the travel distance detection device (4) and the detection result of the rotary cutting device position detection device (5), the distance (L: pitch) and the cutting depth predetermined on the road surface by the rotary cutting device (3). Control device (10: control unit) having a function of forming a plurality of grooves of height (D) ,
When the control device (10) lowers the rotary cutting device (3) to form a groove, a cutting depth previously determined by measuring the time from the start of descent (D: lower limit position of groove) And the vertical position of the rotary cutting device (3) detected by the rotary cutting device detection device (5) when the rotary cutting device (3) is raised after the groove formation. It has a function of determining whether or not it has risen to a predetermined location .

In this case, it is determined based on the measurement results of the cutting depth (D) is rotary cutter position detecting device whether the host vehicle has reached the predetermined depth (5), from the lowered start of rotary cutter (3) Even when the predetermined time (for example, "predetermined time tc: tc = Lg / cylinder speed") has elapsed, the case where the predetermined depth has not been reached or the case where the predetermined depth is reached before the predetermined time has elapsed Can be done (FIGS. 7-9).

The road surface cutting method according to the present invention includes a driving wheel (1) and a guide wheel (2) configured to be vertically movable, and includes a rotary cutting device (3: cutter drum) for cutting the road surface. It has a travel distance detection device (4: encoder, for example) to measure, and a rotary cutting device position detection device (5: cutter drum position detection device: linear sensor, for example) that detects the vertical position of the rotary cutting device (3). The road surface cutting machine (100)
Based on the detection result of the travel distance detection device (4) and the detection result of the rotary cutting device position detection device (5), the distance (L: pitch) and the cutting depth predetermined on the road surface by the rotary cutting device (3). (D) forming a plurality of grooves ,
The rotary cutting device (3) is lowered to form a groove while determining whether or not a predetermined cutting depth (D: lower limit position of the groove) has been reached by measuring the time from the start of the descent. Process,
After forming the groove, the rotary cutting device (3) is raised while judging whether or not it has risen to a predetermined location according to the vertical position of the rotary cutting device (3) detected by the rotary cutting device position detection device (5) It is characterized in that chromatic steps.

In here, predetermined depth of cut by measuring the time from the lowered start: while determining whether or not reached the (D lower limit position of the groove), a rotary cutting apparatus for forming the grooves (3 In the above-described step of lowering the position of the rotary cutting device (3), it is determined whether or not the cutting depth (D) has reached a predetermined depth based on the measurement result of the rotary cutting device position detection device (5). Even if a predetermined time (for example, “predetermined time tc: tc = Lg / cylinder speed”) has elapsed since the start of descent, the predetermined depth has not been reached, or the predetermined depth has been reached before the predetermined time has elapsed. This can be dealt with (FIGS. 7 to 9).

According to the present invention having the above-described configuration, based on the detection result of the travel distance detection device (4), that is, the travel distance of the road surface cutting machine (100) and the detection result of the rotary cutting device position detection device (5), Since the grooves are formed on the road surface by the rotary cutting device (3), by appropriately setting the set value (threshold value) of the travel distance of the road surface cutting machine (100) and the set value of the rotary cutting device position, Grooves having a desired interval (L: pitch) and cutting depth (D) can be formed on the road surface.
Here, it is much easier to set the setting value of the travel distance of the road surface cutting machine (100) and the setting value of the rotary cutting device position as compared with changing the polygonal guide wheel. According to the present invention, it is possible to change the spacing (L: pitch) and the cutting depth (D) of the warning groove during construction.

According to the present invention, the lowering timing of the rotary cutting device (3) is determined by the detection result of the travel distance detection device (4), that is, the travel distance of the road surface cutting machine (100), and therefore follows the speed of the work machine itself. The set pitch (L: groove spacing) can be maintained within the range.
Therefore, according to the present invention, the operator only needs to concentrate on traveling while maintaining the road surface cutting machine (100) in a predetermined position and direction, and it is desirable without checking the numerical value displayed on the display. A groove having an interval (L: pitch) and a cutting depth (D) can be formed on the road surface.

It is explanatory drawing which shows the road surface cutting machine which concerns on embodiment of this invention. It is a block diagram which shows the control apparatus (control unit) in the road surface cutting machine of FIG. It is explanatory drawing which shows the outline | summary of the control timing of alerting groove | channel cutting in 1st Embodiment. It is a flowchart which shows the control in 1st Embodiment. It is a flowchart which shows the control in 1st Embodiment similarly to FIG. It is explanatory drawing which shows the outline | summary of the mechanism which detects the position of the rotary cutting device in embodiment. It is a flow chart which shows control in a 2nd embodiment. It is a flowchart which shows the control performed in parallel with control of FIG. 7 in 2nd Embodiment. It is a flowchart which shows the control in 2nd Embodiment similarly to FIG. It is a flowchart which shows the control in 3rd Embodiment. It is a flowchart which shows the control in 3rd Embodiment similarly to FIG.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
In FIG. 1, a road cutting machine according to an embodiment of the present invention, generally indicated by reference numeral 100, has a drive wheel 1 and a guide wheel 2 at the bottom of a vehicle body 6, and the drive wheel 1 and the guide wheel 2 are travel devices. 13 (FIG. 2).

Although not explicitly shown in FIG. 1, the guide wheels 2 are provided at both ends of the road surface cutting machine 100 in the vehicle width direction (direction perpendicular to the paper surface of FIG. 1). In the region between the wheels 2, 2) a rotary cutting device 3 (cutter drum) for groove cutting is provided.
Here, the rotating shaft (not explicitly shown) of the rotary cutting device 3 is arranged at the same position in the front-rear direction of the rotating shaft 2A of the guide wheel 2 and the road surface cutting machine 100.

The rotary cutting device 3 is a conventionally known device which is rotationally driven by a drive device (not shown) and provided with a large number of cutting bits on its surface.
Although not clearly shown in FIG. 1, the rotation axis of the rotary cutting device 3 is fixed to the vehicle body 6. Therefore, the position of the rotary cutting device 3 is always the same with respect to the vehicle body 6, and the rotary cutting device 3 is not displaced relative to the vehicle body 6. However, in order to prevent complicated description, in this specification, expressions such as “raise the rotary cutting device 3” and “lower the rotary cutting device 3” may be used.
The guide wheel 2 is rotatably supported on the tip 7A of the link 7 by the guide wheel rotating shaft 2A, and the other end 7B of the link 7 is supported on the tip of the rod 8A of the hydraulic cylinder mechanism 8. The link 7 is rotatably pivotally supported by a bracket 9 fixed to the vehicle body 6 by a link rotation shaft 7C. An electric cylinder mechanism may be employed instead of the hydraulic cylinder mechanism.

When the rod 8A of the hydraulic cylinder mechanism 8 extends and contracts, the link 7 rotates about the link rotation shaft 7C, and the guide wheel 2 descends and rises.
More specifically, when the rod 8A extends, the link 7 rotates counterclockwise with respect to the link rotation shaft 7C and descends the guide wheel 2, so that the rotary cutting device 3 rises and the ground (road surface SF: Away from Figure 6).
On the other hand, when the rod 8A contracts, the link 7 pivots clockwise with respect to the link rotation shaft 7C to ascend the guide wheel 2, so the rotary cutting device 3 descends and cuts the ground (the road surface SF) .

In the vicinity of the guide wheel 2, an encoder 4 that is a device for detecting the travel distance of the road surface cutting machine 100 is provided. When the drive wheel 1 rotates and the road surface cutting machine 100 travels, the guide wheel 2 rotates, and the guide wheel The traveling distance of the road surface cutting machine 100 is measured by the encoder 4 detecting the rotation of 2.
A control device 10 (control unit) is mounted on the vehicle body 6 of the road surface cutting machine 100.
A linear sensor 5, which is a device that detects the vertical position of the rotary cutting device 3, is provided on the vehicle body 6. The linear sensor 5 will be described later with reference to FIG. The side plate 11C will also be described later with reference to FIG.

Next, the control device 10 of the road surface cutting machine 100 will be described with reference to FIG.
In FIG. 2, the control device 10 includes a travel distance determination block 10A, a rotary cutting device lower end position determination block 10B, a vertical direction distance Lg determination block 10C, a storage block 10D, a timer 10E, and a judgment block 10F. A determination block), a cylinder valve open / close control signal generation block 10G, and a travel / stop control block 10H.

The travel distance determination block 10A receives a measurement signal from the travel distance detection device 4 installed in the vicinity of the guide wheel 2 via an input side interface (not shown), and based on the measurement signal, the rotation amount of the guide wheel 2, that is, It has a function of determining the travel distance of the road surface cutting machine 100.
The rotary cutting device lower end position determination block 10B receives a measurement signal (a signal indicating the vertical position of the rotary cutting device 3) from the rotary cutting device position detection device 5 via an input-side interface (not shown), and outputs the measurement signal. Based on this, it has the function of determining the lower end position of the rotary cutting device 3 (and / or the vertical distance H from the lower end of the rotary cutting device 3 to the road surface).

The vertical direction distance Lg determination block 10C has a function of determining the vertical direction distance Lg from the lower end of the rotary cutting device 3 to the lower limit (groove bottom) of the alerting groove M.
Here, the vertical distance Lg is a numerical value obtained by adding the distance H from the lower end of the rotary cutting device 3 to the road surface and the depth (D: groove depth) of the alerting groove M (see FIG. 3).
In the vertical distance Lg determination block 10C, the vertical distance H from the lower end position of the rotary cutting device 3 determined in the rotary cutting device lower end position determination block 10B to the road surface SF (see FIG. 6) from the lower end of the rotary cutting device 3 The vertical distance Lg is determined by adding up the predetermined depth D of the alerting grooves.

The determination block 10F has a function of determining whether or not the road surface cutting machine 100 has reached the start point of the formation position of the caution groove M based on the travel distance of the road surface cutting machine 100 determined in the travel distance determination block 10A. . Here, the start point of the road surface cutting machine 100 and the start point of the formation position of the alerting groove M are input and / or set in advance.
In the illustrated embodiment, for example, only 1/2 pitch from the starting point of the first groove forming position (pitch L: distance from the starting point of the groove forming position to the starting point of the next groove forming position at a cutting interval, see FIG. 3). At the front point, when a worker (not shown) presses the set button 12 for starting the groove forming routine, the groove forming routine is started. Then, the determination block 10F has a function of determining whether or not the vehicle has traveled a distance ½ of the pitch (interval) of the alerting groove M from the position where the groove forming routine is started.

Further, with respect to the start point of the second and subsequent groove formation positions, one pitch (from the start point of the alerting groove M (the leading edge of the groove M) formed in the immediately preceding cycle (the immediately preceding cycle in the groove forming routine) ( 1L), it is determined whether or not the vehicle has reached the starting point of the second and subsequent groove formation positions. Here, the measured value of the travel distance of the road surface cutting machine 100 is reset at the start point (the leading edge of the groove M) formed in the immediately preceding cycle (see step S5 in FIG. 4).
The above-mentioned “1/2 pitch from the start point of the first groove formation position” is an example, and other values can be appropriately selected.

Further, the determination block 10F has a function of determining whether or not the rotary cutting device 3 has reached the lower limit (groove bottom) of the warning groove.
For example, it is determined whether or not the lower limit (groove bottom) of the alerting groove has been reached based on a measurement signal (a signal indicating the vertical position of the rotary cutting device 3) from the rotary cutting device position detection device (5: linear sensor). I can do it.
Alternatively, based on the vertical distance Lg determined by the vertical distance Lg determination block 10C and the measurement signal from the timer 10E, the elapsed time since reaching the start point of the groove formation position and starting to descend (time ts) It can be judged (controlled by whether or not the predetermined time tc has elapsed) whether or not the time tc (predetermined time: numerical value obtained by dividing the distance Lg by the cylinder speed: tc = Lg / cylinder speed) has been reached . That is, if the elapsed time after the rotary cutting device 3 starts to descend (time ts) has passed the predetermined time tc, it is determined that the rotary cutting device 3 has reached the groove lower limit.

Here, Lg is the vertical distance from the lower end of the rotary cutting device 3 to the lower limit of the groove (groove bottom) as described above, and the cylinder speed is a constant value.
Although the timer 10E is displayed separately from the determination block 10F in FIG. 2, the timer 10E may be incorporated in the determination block 10F.

Further, the determination block 10F has a function of holding the groove lower limit position after the rotary cutting device 3 reaches the depth (vertical direction position) of the groove lower limit (groove bottom). The lower limit is formed parallel to the road surface (groove M).
For example, the determination block 10F determines the travel distance after the rotary cutting device 3 reaches the depth (vertical direction position) of the groove lower limit (groove bottom) based on the measurement signal from the travel distance detection device 4, and the travel distance is It has a function to determine whether or not the length of the area of the lower limit depth of the groove M (set value: corresponding to the lower limit holding time th) has been reached.
Alternatively, the determination block 10F has a function of determining whether or not the lower limit holding time th for holding the lower limit position of the groove M has elapsed. Here, the lower limit holding time th is a constant, and is determined and input in advance based on the pitch L (cutting interval) of the groove M, the vertical movement speed of the rotary cutting device 3, and the like.

In addition, the determination block 10F has a function of raising the rotary cutting device 3 after the travel distance has reached a set value (the length of the lower limit depth region of the groove M) or after the lower limit holding time th has elapsed. And has a function of determining whether or not the lower end of the raised rotary cutting device 3 has reached a predetermined vertical height H. The rotary cutting device 3 cuts the groove M while moving up (cuts the trailing edge side of the groove M) until the rotary cutting device 3 starts to rise and is separated from the road surface SF (FIG. 6).
The predetermined vertical height H is the lower end position of the rotary cutting device 3 (vertical distance to the road surface) determined based on the measurement signal from the rotary cutting device position detection device 5 (vertical position of the rotary cutting device 3). H) and is determined and updated every time the alerting groove M is cut based on the measurement result of the rotary cutting device lower end position determination block 10B.

The cylinder valve open / close control signal generation block 10G outputs an output (not shown) when the determination result of the determination block 10F is input that "the road surface cutting machine 100 has reached the start point Ps (FIG. 3) of the formation position of the alerting groove M". It has a function of transmitting a control signal for lowering the rotary cutting device 3 to the hydraulic cylinder mechanism 8 via the side interface. The hydraulic cylinder mechanism 8 lowers the rotary cutting device 3 by contracting the rod 8A in accordance with a signal output from the cylinder valve opening / closing control signal generation block 10G.
In addition, cylinder valve open / close control signal generation block 10G receives the determination result of determination block 10F that “rotation cutting device 3 has reached the groove lower limit”. It has a function of transmitting a control signal (ON / OFF signal of the open / close valve) for stopping the lowering.
Here, the hydraulic cylinder mechanism 8 expands and contracts by hydraulic pressure. Although not clearly shown in FIG. 1, the hydraulic cylinder mechanism 8 is in communication with the pressure oil supply system and the pressure oil discharge system, and the pressure oil supply system and the pressure oil discharge system respectively open and close bubbles (not shown) ) Are interspersed. The hydraulic cylinder mechanism 8 expands and contracts by ON / OFF control of the opening / closing valve (not shown).

Furthermore, in the cylinder valve open / close control signal generation block 10G, “travel distance after the rotary cutting device 3 reaches the depth (vertical position) of the groove lower limit (groove bottom) is the set value (the lower limit depth of the groove M The judgment result of judgment block 10F indicating that the region length has reached: lower limit holding time th) or "the lower holding time th for holding while cutting the lower limit of the groove has elapsed" is input And, it has a function of transmitting a control signal for raising the rotary cutting device 3 to the hydraulic cylinder mechanism 8.
Then, the cylinder valve opening / closing control signal generation block 10G receives the determination result of the determination block 10F that “the ascending rotary cutting device 3 has reached a predetermined vertical height”, to the hydraulic cylinder mechanism 8 On the other hand, it has a function of transmitting a control signal for stopping the rising of the rotary cutting device 3.

The travel / stop control block 10H has a function of outputting a travel signal and a stop signal to the travel device 13 (see FIG. 2) of the road surface cutting machine 100.
In addition, when the road surface cutting machine 100 reaches the run / stop control block 10H at a position where the caution groove M should be cut, the rotary cutting device 3 is lowered to a predetermined depth (lower limit depth of groove) to perform rotary cutting. It is also possible to have a function of transmitting a stop signal for stopping the road surface cutting machine 100 to the traveling device 13 (see FIG. 2) while the device 3 makes at least one rotation.

Although not clearly shown in FIG. 2, the control device 10 (control unit) is connected to the input device, and the construction conditions, for example, the pitch (L: cutting interval) of the attention calling groove and the groove Cutting depth D, cylinder speed (constant speed), and time th for cutting while maintaining the groove lower limit (in the second and third embodiments described later, the lower limit distance of the groove M or P2 to P3 in FIG. Data such as the distance between them is input in advance and stored in the storage block 10D.
The storage block 10D has a function of temporarily or continuously storing data of various operations executed in the groove forming routine, in addition to the above data. In FIG. 2, the storage block 10D and the determination block 10F are configured separately, but the storage block 10D can also be incorporated in the determination block 10F.

In addition, the determination block 10F has a function of transmitting a measurement value of the travel distance and a reset signal for resetting the measurement value of the time.
Further, the determination block 10F has a function of starting a groove forming routine when receiving a signal from the set button 12 pressed by the operator.

Although not clearly shown in FIG. 1, the set button 12 is provided on the driver's seat of the road surface cutting machine 100. In FIG. 2, it is represented by one block, but the number of the set buttons is not particularly limited.
When an operator operating the road surface cutting machine 100 in the driver's seat presses the set button 12, for example, the road surface SF (FIG. 6) is spaced at a predetermined interval (pitch) in order to form a warning groove M (FIG. 3). Start or end the cutting routine in L).
In addition, an operation to bring the rotary cutting device 3 close to the road surface is performed by pressing the set button 12 immediately before performing the warning groove forming routine. Furthermore, by pressing the set button 12, a zero point adjustment (calibration) operation can be performed.

The control in the cutting of the alerting groove M will be described with reference to FIG.
In FIG. 3, the rotary cutting device 3 of the road surface cutting machine 100 (only the rotary cutting device 3 is shown in FIG. 3: the road surface cutting machine 100 is not shown in FIG. 3) is an arrow X toward the starting point Ps of the groove forming position. You are moving in the direction.
When the road surface cutting machine 100 reaches a point P1 that is a half pitch (L / 2) ahead (left side in FIG. 3) from the starting point Ps of the groove forming position, an operator (not shown) presses the set button 12. Thus, the routine for groove formation is started.
In FIG. 3, symbol M is a groove (attention groove), symbol T1 indicates time, and symbol T2 indicates time.

When the road surface cutting machine 100 travels by 1⁄2 pitch (L / 2) from the point P1 (when time ts elapses), the start point Ps of the groove forming position is reached, the rotary cutting device 3 descends, and the groove cutting (forming) Is started.
When the rotary cutting device 3 descends and the rotary cutting device 3 reaches the groove lower limit (point P2), a measurement signal (indicating the vertical position of the rotary cutting device 3) from the rotary cutting device position detection device (5: linear sensor). It is judged by the signal that the lower limit (groove bottom) of the warning groove is reached. Alternatively, time tc (predetermined time) has elapsed since groove cutting (formation) is started. When the rotary cutting device 3 reaches the groove lower limit (when it reaches the point P2), the vertical cutting position of the rotary cutting device 3 is held (at the groove lower limit position) and groove cutting is continued.
In the step of cutting the groove while maintaining the vertical position of the rotary cutting device 3 at the groove lower limit position, the travel distance after the rotary cutting device 3 reaches the depth (vertical direction position) of the groove lower limit (groove bottom) is as follows. This is performed until the set value (the length of the region of the lower limit depth of the groove M: corresponding to the lower limit holding time th) is reached or until the time th elapses.

In the illustrated embodiment, in determining whether or not the rotary cutting device 3 has reached the depth (vertical position) of the groove lower limit (groove bottom), in the first embodiment, the rotary cutting device position detection device 5 It is determined by a measurement signal (a signal indicating the vertical position of the rotary cutting device 3). In the third embodiment, the elapsed time after reaching the start point of the groove forming position and starting to descend (time ts) is time tc (predetermined) Time: A value obtained by dividing the distance Lg by the cylinder speed: a predetermined time tc = Lg / cylinder speed) is determined. In the second embodiment, the measurement signal from the rotary cutting device position detection device 5 and the time tc are determined. (Predetermined time: A value obtained by dividing the distance Lg by the cylinder speed: predetermined time tc = Lg / cylinder speed) It is judged by both whether or not it has reached.
On the other hand, the step of cutting the groove while maintaining the vertical position of the rotary cutting device 3 at the groove lower limit position is controlled based on the travel distance of the road surface cutting machine 100 in the first embodiment, and the time th in the third embodiment. In the second embodiment, it can be controlled by either the travel distance of the road surface cutting machine 100 or whether the time th has elapsed.

Referring again to FIG. 3, when the point P3 is reached, the rotary cutting device 3 is raised. Until the lower end of the rotary cutting device 3 rises above the road surface SF (FIG. 6), the rotary cutting device 3 rises while cutting the trailing edge portion of the groove M, and the rotary cutting device 3 cuts the trailing edge portion of the groove M. When the ascending process is finished, the point P4 is reached.
Thereafter, the rotary cutting device 3 rises until its lower end reaches a predetermined vertical height H (vertical distance H to the road surface).
In FIG. 3, a point P5 is a start point of the formation position of the next groove.

In FIG. 3, one pitch (1 L) is a distance from the start point Ps of the groove formation position to the start point P5 of the formation position of the next groove, as illustrated.
Further, as described above, the vertical distance Lg is a numerical value obtained by adding the vertical distance H from the lower end of the rotary cutting device 3 to the road surface and the predetermined depth D of the alerting groove.

Next, with reference mainly to FIG. 4 and FIG. 5, control executed when forming the alerting groove M (FIG. 3) will be described.
In FIG. 4 and FIG. 5, the road surface cutting machine 100 is made to travel to the area where the alerting groove M is to be formed. In step S1, whether or not the road surface cutting machine 100 has reached a point a half pitch (L / 2: L is the pitch of the groove M or the cutting interval) before the starting point position of the first groove M to be formed. to decide. The determination as to whether or not the road cutting machine 100 has reached a point 1/2 pitch before the starting position of the first groove to be formed is based on, for example, the determination of an operator who is on the road cutting machine 100. Although it is performed, other methods (for example, reception of information from a positioning satellite) can also be performed.
When the road surface cutting machine 100 has reached the point L / 2 (1/2 pitch) before the start position of the first (first) groove to be formed (YES in step S1), the process proceeds to step S2. If it is determined that there is no (step S1 is NO), the control loop of step S1 is repeated "NO".

If the road surface cutting machine 100 reaches a point L / 2 (1/2 pitch) before the starting position of the first groove to be formed (YES in step S1), a warning groove M is formed in step S2. Start the routine
Then, the operator presses the set button 12 of the driver's seat in the road surface cutting machine 100 to start a control routine for cutting the alerting groove M. Then, the process proceeds to step S3.
In step S3, the travel distance detection device 4 starts measuring the travel distance from the starting point of the road surface cutting machine 100 (the guide wheel 2), that is, the point where the routine is started in step S2.

In step S4, it is determined whether or not the travel distance from the starting point of the road surface cutting machine 100 (the guide wheel 2 thereof) (starting position of the cutting control routine of the alerting groove M) has reached L / 2 (1/2 pitch). to decide.
If the travel distance has reached L / 2 (1/2 pitch) (YES in step S4), the process proceeds to step S5. If not (NO in step S4), the process returns to step S4. Repeat the control loop of
In step S5, the detection result of the travel distance detection device 4 (encoder) is reset to prepare for travel distance measurement of the road surface cutting machine 100 in the next control cycle. Then, the process proceeds to step S6.

In step S6, the lower end position of the rotary cutting device 3 is determined based on the measurement signal (vertical position of the rotary cutting device 3) from the rotary cutting device position detection device 5 (linear sensor), and thus the road surface SF (FIG. The vertical distance H from 6) to the lower end of the rotary cutting device 3 is determined. Then, the process proceeds to step S7.
The lower end position of the rotary cutting device 3 determined based on the measurement signal (vertical position of the rotary cutting device 3) of the rotary cutting device position detection device 5 (linear sensor) is the step S8 described later. It becomes a parameter in judgment of whether the depth which cuts M reached to predetermined depth.
The vertical distance H from the road surface SF (FIG. 6) to the lower end of the rotary cutting device 3 is stored in the storage block 10D as “rise end height H” in step S13 described later.

In step S7, the hydraulic cylinder mechanism 8 is contracted and the rotary cutting device 3 is lowered. By lowering the rotating rotary cutting device 3, the alerting groove M is cut. Then, the process proceeds to step S8.
In step S8, it is determined from the measurement result of the rotary cutting device position detection device 5 whether or not the cutting depth by the rotary cutting device 3 has reached a predetermined depth.

In step S8, when the cutting depth (the measurement result of the rotary cutting device position detection device 5) by the rotary cutting device 3 does not reach the predetermined depth (design depth) of the caution groove M (step S8 is NO) ) Repeats the control loop in which step S8 is “NO”.
On the other hand, in step S8, when the cutting depth by the rotary cutting device 3 (measurement result of the rotary cutting device position detecting device 5) reaches the predetermined depth (design depth) of the alerting groove M (step S8). In the case of YES), the process proceeds to step S9.

When the rotary cutting device 3 reaches the lower limit (groove bottom) of the alerting groove (YES in step S8), the contraction of the hydraulic cylinder mechanism 8 is stopped and the descent of the rotary cutting device 3 is stopped. The vertical position of the lower end of the rotary cutting device 3 is held at a predetermined level of the lower limit (groove bottom) of the caution groove M.
At the same time (at step S9), measurement by the travel distance detection device 4 is started. In other words, the measurement of the traveling distance after the rotary cutting device 3 has reached the depth (vertical position) of the groove lower limit (groove bottom) is started. During this time, since the rotary cutting device 3 is rotating and the road surface cutting machine 100 is traveling, the horizontal plane at the lower limit (groove bottom) of the alerting groove M is cut (formed).
Then, the process proceeds to step S10 (FIG. 5).

Control performed after step S9 in FIG. 4 will be described with reference to FIG.
In step S10 of FIG. 5, the travel distance of the road surface cutting machine 100 after the rotary cutting device 3 reaches the lower limit (groove bottom) of the alerting groove M (the length of the region of the lower limit depth of the groove M) is It is determined whether the value is equal to or greater than the set value.
If the length of the area of the lower limit depth of the groove M is equal to or greater than the set value (YES in step S10), it is determined that the lower limit (groove bottom) of the alerting groove M has been cut by a necessary length, and step S11 is performed. Go to
If the length of the area of the lower limit depth of the groove M is less than the set value (NO in step S10), it is determined that the lower limit (groove bottom) of the alerting groove M is not cut by a required length, Returning to step S10, the road surface cutting machine 100 travels in a state where the lower limit depth of the groove M is maintained (a loop in which step S10 is NO).

In step S11, the hydraulic cylinder mechanism 8 is extended to raise the rotary cutting device 3. Then, the process proceeds to step S12.
In step S12, the lower end position (vertical distance from the road surface) of the rotary cutting device 3 is determined based on the measurement signal of the rotary cutting device position detection device 5 (linear sensor) (measurement result of the vertical position of the rotary cutting device 3). Do. Then, the process proceeds to step S13.

In step S13, it is determined whether the lower end position of the rotary cutting device 3 has reached the rising end height H (the vertical height at the end of the cutting).
If the lower end position of the rotary cutting device 3 has reached the rising end height H (YES in step S13), the process proceeds to step S14. If it is determined that the lower end position of the rotary cutting device 3 has not reached the rising end height H (NO in step S13), the process returns to step S13.
In the first embodiment, the rising end height H is, for example, a numerical value of “vertical direction distance H from the road surface” measured in step S6. This value is updated every time the groove M is cut. I can do it.

In step S14, the extension of the hydraulic cylinder mechanism 8 is stopped and the rising of the rotary cutting device 3 is stopped. Then, the lower end position of the rotary cutting device 3 is held at the elevation end height H.
In step S14, the cutting (forming) of the first (first) notice groove is completed. Then, the process proceeds to step S15.

Next, in step S15, it is determined whether or not the local point is a region where the alerting groove M is to be formed, that is, whether or not the formation of the alerting groove M is continued.
In the illustrated embodiment, the operator himself determines whether to continue forming the warning groove M, and if it is determined to continue forming the groove M (YES in step S15), the process proceeds to step S16, and the groove is determined If it is determined that the formation of M is ended (NO in step S15), the process proceeds to step S17.

In step S16 (when it is determined to continue forming the warning groove M), the traveling distance from the starting point of (the guide wheel 2) of the road surface cutting machine 100, that is, the starting point Ps of the groove M in the immediately preceding groove forming cycle is (step It is determined whether or not one pitch (pitch L: cutting interval) has been reached (see S5).
If it is determined that the travel distance has reached one pitch (YES in step S16), the process proceeds to step S5, and cutting (forming) of the next attention calling groove M in the area of the attention calling groove M is performed. Thereafter, the loop from step S16 to step S5 is repeated until it is determined in step S15 that the worker ends groove formation.
When it is determined that the traveling distance has not reached one pitch (NO in step S16), the loop of step S16 repeats "NO".

In step S17 (when it is determined that the formation of the alerting groove M is finished), the routine of forming the alerting groove M is ended. Specifically, when the operator presses the set button 12 in the driver's seat of the vehicle body, a signal is sent to the control device 10 and the end processing of the alerting groove M forming routine is completed. Then, the process proceeds to step S18.
In step S18, the travel distance detection device (4: encoder) is stopped, and the routine for forming the warning groove M ends.

As described above, the vertical position of the rotary cutting device 3 is measured by the rotary cutting device position detection device 5. An example of the rotary cutting device position detection device 5 will be described with reference to FIG.
In FIG. 6, the rotary shaft 3A of the rotary cutting device 3 is rotatably supported by a vehicle body 6 (not shown), and the vehicle body 6 is provided with a measuring body 11 consisting of a wire 11A, a spring 11B and a side plate 11C. .

The wire 11A of the measuring body 11 is slidably retained on the wire retaining and fixing shaft 14 fixed to the vehicle body 6, one end of the wire 11A is coupled to the spring 11B, and the other end of the wire 11A is a side plate Connected to 11C.
The other end of the spring 11B is fixed to the vehicle body 6 by a spring fixing shaft 11D.
The rotary cutting device position detection device 5 is configured to measure the displacement of the wire 11 </ b> A of the measurement body 11 by the measurement unit 5 </ b> A, and is provided close to the measurement body 11.

As described above, when the road surface cutting machine 100 cuts the warning groove M, the hydraulic cylinder mechanism 8 (not shown) expands and contracts, and the guide wheel 2 (not shown) moves up and down. The vertical position of the device 3 with respect to the road surface SF or the ground G changes.
Here, since the side plate 11C is heavy, the hydraulic cylinder mechanism 8 is expanded and contracted to maintain contact with the ground G even when the guide wheel moves up and down, but the amount of extension of the spring 11B changes. The rotary cutting device position detection device 5 measures the expansion and contraction of the spring (change in the amount of extension of the spring), that is, the displacement of the wire 11A.
Since the side plate 11C maintains a state in contact with the road surface SF (ground G), the displacement of the wire 11A corresponds to the position of the vehicle body 6, that is, corresponds to the position of the rotary cutting device 3. Therefore, the displacement of the wire 11A can be measured by the rotary cutting device position detection device 5, and thereby, the lower end position of the rotary cutting device 3 can be measured.

According to the illustrated first embodiment, the detection result of the travel distance detection device 4, that is, the travel distance of the road cutting machine 100, and the detection result of the rotary cutting device position detection device 5, that is, based on the lower end position of the rotary cutting device 3. Thus, the vertical movement of the rotary cutting device 3 is controlled to form a warning groove M on the road surface. Then, by appropriately setting the setting value of the travel distance of the road surface cutting machine 100 and the setting value of the rotary cutting device position, a groove having a desired interval (L: pitch) and a cutting depth D can be formed on the road surface. It can.
Here, the operation of appropriately setting the set value (L / 2, L) of the travel distance of the road surface cutting machine 100 and the set value (cutting depth D) of the position of the rotary cutting device 3 is a polygon in the prior art. It is much easier than changing the guide wheel. Therefore, according to the present invention, it is easy to arbitrarily change the gap (L: pitch) and the cutting depth D of the warning groove during construction.

Moreover, since the descent timing of the rotary cutting device 3 is determined by the detection result of the traveling distance detection device 4, that is, the traveling distance of the road surface cutting machine 100, the set pitch L (the interval of the attention calling grooves M) can be maintained.
The timing of the ascent of the rotary cutting device 3 is also determined by the detection result of the travel distance detection device 4, that is, the travel distance of the road surface cutting machine 100, so that the operator maintains the road surface cutting machine 100 in a predetermined position and direction. It suffices to concentrate on running, and grooves having a desired interval (L: pitch) and cutting depth D can be formed on the road surface without checking the numerical values displayed on the display.

Further, according to the illustrated embodiment, whether or not the rotary cutting device 3 is lowered to reach a predetermined cutting depth (D: lower limit position of the groove) is detected by the rotary cutting device position detection device 5. It can be judged by Therefore, when the rotary cutting device 3 reaches the lower limit position (predetermined cutting depth D), the rotary cutting device 3 can be stopped from descending, and the lowered vertical position can be maintained. The form of M is stabilized.

Next, a second embodiment of the present invention will be described with reference to FIGS.
In 1st Embodiment, it is judged from the measurement result of the rotary cutting device position detection device 5 whether the cutting depth by the rotary cutting device 3 has reached a predetermined depth.
On the other hand, in 2nd Embodiment of FIGS. 7-9, based on both the elapsed time from the fall start of the rotary cutting device 3, and the measurement result of the rotary cutting device position detection apparatus 5, the rotary cutting device 3 is used. It is determined whether or not the cutting depth according to has reached a predetermined depth.

The differences between the control of the second embodiment and the control of the first embodiment (see FIGS. 4 and 5) will be described below with reference to FIGS.
Steps S1 to S6 in FIG. 7 are the same as those in FIG.
Also in step S6 of FIG. 7, the vertical direction distance H from the road surface SF (FIG. 6) to the lower end of the rotary cutting device 3 is determined, and the process proceeds to step S7A.
Here, the vertical distance H is used to calculate the vertical distance Lg in step S8A. As described above with reference to FIG. 3, the distance Lg is a value obtained by adding the depth D of the alerting groove to the vertical distance H from the road surface (Lg = vertical distance H from the road surface + the alerting groove Depth D).

In step S7A, the hydraulic cylinder mechanism 8 is contracted, and the rotary cutting device 3 is lowered to cut the warning groove M. The timer 10E is activated (ON) at the start of the descent of the rotary cutting device 3, and the elapsed time from the start of the descent of the rotary cutting device 3 is measured. Then, the process proceeds to step S8A.
In step S8A, it is determined whether or not the measurement time by the timer 10E (elapsed time from the start of lowering of the rotary cutting device 3) is “tc (predetermined time)” or more. Here, the time tc (predetermined time) is a numerical value obtained by dividing the vertical distance Lg by the cylinder speed (constant value) (predetermined time tc = Lg / cylinder speed). As described above, the vertical distance Lg is a value obtained by adding the distance H from the lower end of the rotary cutting device 3 to the road surface (measured in the previous step S6) and the depth of the warning groove (D: groove depth). Therefore, if the measurement time is equal to or longer than the “predetermined time tc (= Lg / cylinder speed)”, the rotary cutting device 3 has reached the lower limit (groove bottom) of the alerting groove M.
That is, in step S8, the rotary cutting device 3 alerts the user by determining whether or not the time measured by the timer 10E (the elapsed time since the descent start of the rotary cutting device 3) is equal to or greater than the “predetermined time tc”. It is determined whether or not the lower limit (groove bottom) of the groove M has been reached.

Here, in the control of FIG. 7, whether or not the rotary cutting device 3 has reached the lower limit (groove bottom) of the alerting groove M depending on whether or not the elapsed time from the start of descent of the rotary cutting device 3 is the predetermined time tc or more At the same time, the rotary cutting device position detection device 5 (linear sensor) that detects the position of the rotary cutting device 3 measures the depth D (cutting depth) of the alerting groove, and the depth of the alerting groove. It is determined whether or not D has reached a predetermined depth.
Even if a predetermined time (eg, “Lg / cylinder speed”) has elapsed since the descent start of the rotary cutting device 3, the predetermined depth has not been reached, or the predetermined depth has been reached before the predetermined time has elapsed. This is to deal with the case where it has occurred.

In step S8A, if the time measured by the timer 10E (the elapsed time from the start of the descent of the rotary cutting device 3) is less than the "predetermined time tc" (NO in step S8A), the process proceeds to step S81.
Here, even if the measurement time by the timer 10E is less than the "predetermined time tc", it is necessary to cope with the case where the depth D of the warning groove has reached the predetermined depth because the road surface is soft or the like. is there. Therefore, in step S81, the vertical direction distance H to the lower end of the rotary cutting device 3 before the descent from the road surface SF (FIG. 6) determined in step S6 and the measurement result of the rotary cutting device position detection device 5 (linear sensor) From this, the cutting depth by the rotary cutting device 3 is determined.
Then, it is determined whether or not the cutting depth (measurement result) by the rotary cutting device 3 determined in step S81 has reached a predetermined depth (design depth) of the alerting groove M (step S82).

If the cutting depth (measurement result) determined by the rotary cutting device 3 determined in step S81 has not reached the predetermined depth (design depth) of the alert groove M (NO in step S82), step S8A Returning to step S8A and step S82, the control loop of “NO” is repeated.
On the other hand, when the cutting depth (measurement result) by the rotary cutting device 3 determined in step S81 has reached the predetermined depth (design depth) of the alerting groove M (YES in step S82), Since the rotary cutting device 3 has reached the lower limit (groove bottom) of the alerting groove M, the time measured by the timer 10E (the elapsed time from the start of the descent of the rotary cutting device 3) is less than the “predetermined time tc”. Even if “predetermined time tc” or longer, the process proceeds to step S9A.

In step S8A, even if the measurement time by the timer 10E is "predetermined time tc" or more (YES in step S8A), the depth D of the alerting groove has reached the predetermined depth because the road surface is hard etc. If not, you need to deal with it.
Therefore, in the control shown in FIG. 7, even if the measurement time by the timer 10E is “predetermined time tc” or more (YES in step S8A), the process proceeds to step S81 to determine the cutting depth by the rotary cutting device 3 and determine in step S81 It is determined whether or not the cut depth (measurement result) has reached a predetermined depth (design depth) of the alerting groove M (step S82).

Then, even if the measurement time by the timer 10E is "predetermined time tc" or more (YES in step S8A), the cutting depth (measurement result) by the rotary cutting device 3 determined in step S81 is that of the attention causing groove M. If it does not reach the predetermined depth (design depth) (NO in step S82), the process returns to step S8A, and repeats step S8A, step S81, and step S82 (a loop of "NO" in step S82).
After that, if the cutting depth (measurement result) by the rotary cutting device 3 determined in step S81 reaches a predetermined depth (design depth) of the alerting groove M (if step S82 is YES), rotation is performed. Since the cutting device 3 has reached the lower limit (groove bottom) of the warning groove M, the process proceeds to step S9A.

When the rotary cutting device 3 reaches the lower limit (groove bottom) of the caution groove and proceeds to step S9A, the contraction of the hydraulic cylinder mechanism 8 is stopped and the descent of the rotary cutting device 3 is stopped, and the lower end of the rotary cutting device 3 Is maintained at a predetermined level (constant cutting depth) of the lower limit (groove bottom) of the caution groove M. Then, the timer 10E is reset. Then, the travel distance detection device 4 starts measuring the travel distance of the road surface cutting machine 100 after the rotary cutting device 3 reaches the lower limit (groove bottom) of the alerting groove M.
Here, since the rotary cutting device 3 rotates and the road surface cutting machine 100 is running, the horizontal plane at the lower limit (groove bottom) of the alerting groove M is cut (formed).
Then, the process proceeds to step S10A (FIG. 9).

Here, the control relating to steps S81 and S82 in FIG. 7 is based on the assumption that the rotary cutting device position detection device 5 (linear sensor) operates normally. In other words, if there is an abnormality in the rotary cutting device position detection device 5, the depth of the alerting groove M cannot be set to a predetermined depth (design depth) by the control in steps S81 and S82.
Therefore, in the second embodiment, the control shown in FIG. 8 is always executed separately from the control of FIG. 7 (by running the control of FIG. 8 on the reverse side of the control of FIG. 7). This prevents the depth of the alerting groove M from becoming a predetermined depth (design depth) due to the occurrence of an abnormality in the above.

In FIG. 8, in step S <b> 51, it is detected whether an abnormality has occurred in the rotary cutting device position detection device 5 using a known method. If there is no abnormality, step S51 repeats the control loop of "NO".
If an abnormality is detected in the rotary cutting device position detection device 5 (YES in step S51), the process proceeds to step S52, and the depth of the alerting groove M is determined by the rotary cutting device position detection device 5 (step S81: FIG. 7). ) And the determined depth of the alerting groove M and a predetermined value (step S82: FIG. 7) are omitted.
Then, in step S52, if the measurement time by the timer 10E is less than "predetermined time tc" (NO in step S8A), the process returns to step S8A, and if the measurement time by the timer 10E is "predetermined time tc" or more (step S8A) YES) The control proceeds to step S9A.

The control in step S52 is executed until no abnormality is detected by the rotary cutting device position detection device 5 in the subsequent control cycle.
Note that the control in FIG. 8 may be executed behind the control shown in FIGS. 4 and 5 in the first embodiment.

In FIG. 9, in step S10A, the travel distance of the road cutting machine 100 from the point P2 in FIG. 3, that is, the lower limit distance of the groove M is equal to or greater than a set value (set value of the distance of the lower limit depth portion of the groove M). Determine if it is or not.
If the lower limit distance of the groove M is equal to or larger than the set value (YES in step S10A), the process proceeds to step S11A. On the other hand, if the lower limit distance of the groove M is less than the set value (NO in step S10A), the loop in which step S10A is “NO” is repeated.

Here, in the second embodiment of FIGS. 7 to 9, in the process of holding the vertical direction position of the rotary cutting device 3 at the lower limit position of the groove and cutting the caution groove M, the rotary cutting device 3 cuts the caution groove M Based on the travel distance of the road surface cutting machine 100 from the time when the lower limit (groove bottom) is reached, it is not only determined whether or not the rotary cutting device 3 is raised, but also depending on whether or not the time th has elapsed. It is also possible to judge.
Although it is not clearly shown in FIGS. 7 and 9, when it is judged based on whether or not the time th has elapsed, after the timer 10E is reset in step S9A, the rotary cutting device 3 lowers the lower limit of the attention calling groove M (groove The elapsed time is measured by the timer 10E from the time when it reaches the bottom. In step S10A, it is determined whether or not the elapsed time is equal to or longer than the set time th. Here, as shown in FIG. 3, the time th is set such that the travel distance of the road surface cutting machine 100 is equal to the set length of the area where the depth of the alerting groove M is the lower limit (groove bottom). ing. Therefore, if the elapsed time th or more after the rotary cutting device 3 reaches the lower limit (groove bottom) of the alerting groove M, the area where the depth of the alerting groove M is the lower limit (groove bottom) is The set length has been cut.
Note that the timer that is reset in step S9A and the timer that measures the elapsed time from when the rotary cutting device 3 reaches the lower limit (groove bottom) of the alerting groove M are a single timer (for example, timer 10E). Or a separate timer may be used.

In step S11A, as in the first embodiment, the hydraulic cylinder mechanism 8 is extended and the rotary cutting device 3 is raised. Here, when the comparison with the time th is performed (not shown), it is necessary to reset the timer in step S11A.
Steps S12 to S18 are the same as the control shown in FIG. 5 in the first embodiment, and thus the description thereof will not be repeated.

According to 2nd Embodiment of FIGS. 7-9, time tc (predetermined time) which judges whether the rotary cutting device 3 reached the cutting depth D of the alerting groove | channel M is the rotation cutting device 3's. The vertical distance Lg from the lower end to the lower limit of the caution groove (groove bottom) is set by dividing it by the cylinder speed (constant value), and it can be determined and updated every cutting (formation) of the caution groove M It is possible. Therefore, the alerting groove M is formed in an accurate shape, and after being formed, when the vehicle travels on the groove M, the driver travels on the alerting groove M without making the driver feel uncomfortable. Can be informed.
The other configuration and effects in the second embodiment of FIGS. 7 to 9 are the same as those of the first embodiment of FIGS. 1 to 6.

Next, a third embodiment of the present invention will be described with reference to FIGS.
In the first embodiment, whether or not the cutting depth by the rotary cutting device 3 has reached a predetermined depth is determined based on the measurement results of the rotary cutting device position detection device 5, and the second embodiment of FIGS. In the embodiment, whether or not the cutting depth by the rotary cutting device 3 has reached a predetermined depth based on both the elapsed time from the start of descent of the rotary cutting device 3 and the measurement result of the rotary cutting device position detection device 5 Deciding. On the other hand, in the third embodiment of FIGS. 10 and 11, it is determined whether or not the cutting depth by the rotary cutting device 3 has reached a predetermined depth based on the elapsed time from the start of the descent of the rotary cutting device 3. ing.
Further, in the first embodiment and the second embodiment, in the process of holding the vertical direction position of the rotary cutting device 3 at the lower limit position of the groove and cutting the caution groove M, the rotary cutting device 3 cuts the lower limit of the caution groove M Judgment is made on the basis of the travel distance of the road surface cutting machine 100 from the time of reaching the (groove bottom) (steps S10, S10A: However, in the second embodiment, it can also be judged by comparison with the time th). On the other hand, in the third embodiment of FIG. 10 and FIG. 11, it is judged by whether or not the time th has elapsed.

The differences between the control of the third embodiment and the control of the second embodiment (FIGS. 7 to 9) will be described with reference to FIGS.
In FIG. 10, steps S1 to S6 are the same as those in FIG.
In step S7B, as in step S7A (FIG. 7), the rotary cutting device 3 is lowered to cut the warning groove M. The timer 10E is activated (ON) at the start of the descent of the rotary cutting device 3, and the elapsed time from the start of the descent of the rotary cutting device 3 is measured. Then, the process proceeds to step S8B.

In step S8B, it is determined whether or not the time measured by the timer 10E (the elapsed time since the descent start of the rotary cutting device 3) is equal to or greater than the “predetermined time tc”. Here, the predetermined time tc is the same as the parameter described in FIG. 7, and is a numerical value obtained by dividing the vertical distance Lg by the cylinder speed (a constant value) (predetermined time tc = Lg / cylinder speed). If the measurement time in step S8B is "predetermined time tc (= Lg / cylinder speed)" or more (YES in step S8B), the rotary cutting device 3 has reached the lower limit (groove bottom) of the caution groove M. .
Here, in the control of FIG. 7, it is judged by the rotary cutting machine position detection device 5 whether or not the depth D (cutting depth) of the caution groove M has become a set value (steps S81 and S82). Such control is not performed in FIG. In step S8B of FIG. 10, when the measurement time is “predetermined time tc (= Lg / cylinder speed)” or more (YES in step S8B), the rotary cutting device 3 reaches the lower limit (groove bottom) of the caution groove M. The process proceeds to step S9B. Then, in step S8B, if the measurement time by timer 10E (the elapsed time from the start of descent of rotary cutting device 3) is less than "predetermined time tc" (NO in step S8B), the measurement time by timer 10E is "predetermined" Step S8B repeats the “NO” loop until time tc ”is reached.

In step S9B, the contraction of the hydraulic cylinder mechanism 8 is stopped and the descent of the rotary cutting device 3 is stopped, and the vertical position of the lower end of the rotary cutting device 3 is maintained at the predetermined level of the lower limit (groove bottom) of the caution groove M. Do.
At the same time, after the timer 10E is reset, the elapsed time is measured by the timer 10E from the time when the rotary cutting device 3 reaches the lower limit (groove bottom) of the alerting groove M. Then, the process proceeds to step S10B.
In step S9B, the timer to be reset and the timer that measures the elapsed time from the time when the rotary cutting device 3 reaches the lower limit (groove bottom) of the caution groove M are the same timer (for example, timer 10E). Alternatively, a plurality of types of timers may be provided in advance and separate timers may be used.

In step S10B, it is determined whether or not the elapsed time from when the rotary cutting device 3 reaches the lower limit (groove bottom) of the alerting groove M is equal to or longer than the set time th. Here, for the time th, as described above with reference to FIG. 9, the traveling distance of the road surface cutting machine 100 becomes equal to the set length of the region where the depth of the alerting groove M is the lower limit (groove bottom). When the time th elapses, the set length of the region where the depth of the alerting groove M is the lower limit (groove bottom) is cut.
If the elapsed time from when the rotary cutting device 3 reaches the lower limit (groove bottom) of the alerting groove M is greater than or equal to the set time th (YES in step S10B), the process proceeds to step S11B.
In step S11B, the timer 10E is reset, the hydraulic cylinder mechanism 8 is extended, and the rotary cutting device 3 is raised.

Step S12 and subsequent steps are the same as the control shown in FIG.
The configurations and the effects other than those described above in the third embodiment of FIGS. 10 and 11 are the same as those of the embodiment of FIGS.

It should be noted that the illustrated embodiment is merely an example, and is not a description for the purpose of limiting the technical scope of the present invention.
For example, in the illustrated embodiment, a linear sensor is used as the rotary cutting device position detection device 5 that detects the vertical position of the rotary cutting device 3, and an encoder is used as the travel distance detection device 4 that measures the travel distance of the road surface cutting machine 100. ing. However, such measurement means is also an example, and other detection devices and sensors can be used.

Further, although not explicitly shown in the illustrated embodiment, it is preferable to provide two hydraulic cylinder mechanisms 8 in the width direction (left-right direction) of the road surface cutting machine 100 and to control each independently.
In addition, in the illustrated embodiment, the rotary cutting device 3 (cutter drum) for road surface cutting is located at the same position in the front-rear direction with respect to the guide wheel 2, but the rotary cutting device 3 is located with respect to the guide wheel 2. It is possible to arrange it forward or backward.

In the illustrated embodiment, the road surface cutting machine 100 cuts the alerting groove M without stopping during traveling, but when the cutting of the alerting groove M is started, the road surface cutting machine 100 The traveling can be stopped to cut the warning groove M. In that case, the road surface cutting machine 100 is stopped in steps S7, S7A, and S7B. Then, when the rotary cutting device 3 reaches the lower limit (groove bottom) of the warning groove, in steps S9, S9A, and S9B, the road surface cutting machine 100 stopped in step S7B is caused to travel again.
By stopping the traveling of the road surface cutting machine 100 when cutting the caution groove M and cutting the caution groove M, at least one rotation of the rotary cutting device 3 with respect to a single groove M, The surface of the alerting groove M can be smoothed.
Here, when the dimension in the front-rear direction of the warning groove M is small, the rotary cutting device 3 is lowered to a predetermined depth and immediately raised, the road surface is cut by the width dimension required for the warning groove M. . In such a case, it is not necessary to measure the lower limit distance of the groove M (the travel distance of the road surface cutting machine 100 from the point P2 in FIG. 3).

DESCRIPTION OF SYMBOLS 1 ... Drive wheel 2 ... Guide wheel 2A ... Rotation shaft 3 ... Rotation cutting device 3A ... Rotation shaft 4 ... Traveling distance detection apparatus (encoder)
5 ... Rotary cutting device position detection device (linear sensor)
6 ... body 7 ... link 7A ... link tip 7B ... link hydraulic cylinder mechanism side end 7C ... link rotating shaft 8 ... hydraulic cylinder mechanism 8A ... piston 8B ... · Cylinder 9 · · · Bracket 10 · · · Control device (control unit)
10A: Travel distance determination block 10B ... Rotary cutting device lower end position determination block 10C ... Vertical distance Lg determination block 10D ... Memory block 10E ... Timer 10F ... Judgment block 10G ... Cylinder valve opening / closing control signal generation block 10H ... travel stop control block 11 ... measurement body 11A ... wire 11B ... spring 11C ... side plate 11D ... spring fixed shaft 12 ... set button 13 · · · · traveling device 14 · · · wire locking fixed shaft 100 · · · road surface cutting machine

Claims (2)

It has a drive wheel and a guide wheel configured to be movable up and down, and includes a rotary cutting device for road surface cutting,
It has a travel distance detection device that measures travel distance, and a rotary cutting device position detection device that detects the vertical position of the rotary cutting device,
A control device having a function of forming a plurality of grooves having predetermined intervals and cutting depths on the road surface by the rotary cutting device based on the detection result of the travel distance detection device and the detection result of the rotary cutting device position detection device. has,
The control device has a function of determining whether or not a predetermined cutting depth has been reached by measuring the time from the start of descent when descenting the rotary cutting device for ditch formation, and ditch formation When the rotary cutting device is later lifted, it has a function of determining whether or not the rotary cutting device has been lifted up to a predetermined position by the vertical position of the rotary cutting device detected by the rotary cutting device position detecting device. Road surface cutting machine. A driving wheel and a guide wheel configured to be movable up and down, provided with a rotary cutting device for road surface cutting, a travel distance detecting device for measuring a travel distance, and a rotary cutting for detecting a vertical position of the rotary cutting device A road surface cutting machine having a device position detection device is used,
Based on the detection result of the travel distance detection device and the detection result of the rotary cutting device position detection device, a plurality of grooves having a predetermined interval and cutting depth are formed on the road surface by the rotary cutting device ,
A step of lowering the rotary cutting device for groove formation while determining whether or not a predetermined cutting depth has been reached by measuring the time from the start of lowering;
After the groove formation, it has a step of raising the rotary cutting device while judging whether or not it has been raised to a predetermined position by the vertical position of the rotary cutting device detected by the rotary cutting device position detecting device. Road surface cutting method.

Images