JP3913761B2 - Sound groove forming device on paved road - Google Patents

Description

The present invention relates to an apparatus for forming a plurality of sound grooves that generate vibration sound that is heard as a predetermined melody when a road-passing vehicle travels on a road surface paved with asphalt or concrete.

  Conventionally, when a general vehicle travels on the road at a predetermined speed, a road on which the vibration of the vehicle is heard as a predetermined melody by a vehicle occupant or the like (the applicant disclosed in Japanese Patent Publication No. 5-9561) Proposed acoustic road) is known.

  Such an acoustic road is such that vibration generated by contact between a tire and a road surface during traveling of a vehicle is heard as a predetermined sound, and a vibration source is formed as a groove (sound groove) formed on the road surface. Yes. The grooves are formed in parallel along the crossing direction of the paved road, and although the pitch of the sound can be changed by the distance between the grooves, the speed of vehicles traveling on the road is different. Since the pitch also changes depending on the condition of the vehicle, it is necessary to make the traveling speed of the vehicle constant so that it can be heard as a predetermined melody.

  On the other hand, when the vehicle travels at a constant speed, in order to generate a vibration sound that can be heard as a predetermined melody, the interval between the grooves is important. Therefore, a beat phenomenon occurs, it is difficult to recognize a predetermined melody, and noise is generated, so that the purpose is not achieved. For this reason, accuracy in millimeters is required in forming the sound groove.

  By the way, on airport runways, steep slope roads, or highways, there are cases where a plurality of grooves are cut and formed on the road surface, but these are intended to prevent slipping and snoozing driving, and play a melody. There is no special function.

  As a device for forming cutting grooves at a predetermined interval on the road surface, a cutting device installed at the bottom of a self-propelled vehicle and moving up and down integrally with the vehicle body of the vehicle is fixed to the vehicle body via a connecting member. And a guide wheel that is rotatably engaged with the lower end of the support member, and the guide wheel moves up and down so that the cutting device moves up and down in conjunction with the guide wheel. A cutting machine is known (for example, Patent Document 1).

Japanese Patent Laid-Open No. 2003-253619

  However, in the road surface cutting machine of Patent Document 1, the cutting device is provided integrally with the self-propelled vehicle, and the cutting device forms a cutting groove in the moving direction of the vehicle. Not suitable for formation.

  In other words, if the cutting groove is formed by moving the self-propelled vehicle, the groove cannot be formed at an accurate interval, and even if a plurality of cutting grooves are formed along the crossing direction of the paved road. It cannot be an acoustic road.

  Further, since a groove is formed from end to end of the traffic lane restricted in construction, if the self-propelled vehicle is moved in the transverse direction of the restricted lane, the vehicle body protrudes into the common lane where traffic is not restricted. For this reason, a method of moving the self-propelled vehicle from the center of the regulated lane to the end must be adopted. However, frequent positioning operations not only cause a reduction in work efficiency, but also cause a large error in the groove spacing. It becomes a factor.

The present invention has been made in view of the above circumstances, and its purpose is to generate a vibration sound that is heard as a predetermined melody when a road-passing vehicle travels on a road surface paved with asphalt or concrete. An object of the present invention is to provide an apparatus capable of accurately forming a plurality of sound grooves.

In order to achieve the above object, the present invention
A device for forming a plurality of sound grooves on the road surface of a paved road for generating a vibration sound that is heard as a predetermined melody by traveling of a road-passing vehicle,
A groove forming head having a cutter blade that is installed in the lower part of the vehicle body in a predetermined construction vehicle and moves in the transverse direction of the paved road to form the sound groove in the same direction;
Posture correcting means for correcting the direction of the groove forming head with respect to the transverse direction of the paved road in a state where the construction vehicle is stopped on the paved road;
A head feed mechanism that moves the groove-forming head in the crossing direction of the paved road while the construction vehicle is stopped on the paved road;
A head lifting mechanism for moving the groove forming head in the vertical direction;
A head position changing mechanism for moving the groove forming head in the longitudinal direction of the paved road in a state where the construction vehicle is stopped on the paved road,
The head position changing mechanism includes an upper frame forming a first guide rail, a pair of left and right movable side plates guided by the first guide rail, and the movable side plate along the first guide rail. A pair of left and right actuators to be moved,
The head feed mechanism includes a lower frame that forms a second guide rail orthogonal to the first guide rail and is coupled to the movable side plate, and a pair of front and rear lower portions that move along the second guide rail. A movable side plate,
The groove forming head is held by the lower movable side plate,
The posture correcting means includes a pair of parallel screw shafts that are individually driven to rotate by the pair of actuators, a pair of nuts into which the screw shafts are screwed, and a pair of the nuts that are rotatably attached. The two holding tools are attached to a connecting plate that connects the pair of movable side plates with an adjuster bolt .

According to the apparatus of the present invention, since the groove forming head is moved in the transverse direction and the longitudinal direction of the road while the construction vehicle is stopped, the sound groove is formed at an accurate position at an accurate interval. As a result, it is possible to finish a sound groove that can be recognized as a predetermined melody that does not generate a beat phenomenon.

  In addition, work efficiency is greatly improved compared to positioning by construction vehicles, and the sound groove is formed with the construction vehicle stopped, so construction can be done without protruding a part of the device within a limited range. can do.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing a configuration example of an apparatus according to the present invention. In FIG. 1, reference numeral 1 denotes a construction vehicle. The construction vehicle 1 has telescopic legs 3 formed of hydraulic cylinders or the like on both front and rear sides of a vehicle body 2, and a crawler type lower traveling body 4 is provided at each lower end thereof. The construction vehicle 1 is not limited to the example shown in the figure, and can be driven forward and backward, has a steering device, and has a driving source such as a prime mover, a generator, and a hydraulic device for operating a unit to be described later. If equipped, various existing construction vehicles can be used.

  The groove forming apparatus according to the present invention is configured by detachably attaching the groove forming unit 10 to the lower part of the vehicle body 2 in the construction vehicle 1 as described above.

  The groove forming unit 10 includes an upper frame 11 that is detachably attached to a lower portion of a vehicle body 2 constituting the construction vehicle 1 using bolts and the like, and a lower frame 12 that is suspended below the upper frame 11. Below 12, a groove forming head 13 described later is provided.

  FIG. 2 is a plan view showing the upper frame, FIG. 3 is a side view showing the groove forming unit partially enlarged, and FIG. 4 shows a partially enlarged section taken along line AA of FIG.

  As is apparent from FIG. 2, the upper frame 11 is a rectangular frame formed by connecting structural steel and the like, and the two members on the long side thereof are guide rails made of H-shaped steel, C-shaped steel, I-shaped steel or the like. 11A (H-shaped steel in this example), which is configured to be connected by a short-side cross member 11B to maintain a parallel state. A pair of left and right movable side plates 14 that are moved and guided by guide rails 11 </ b> A are provided inside the upper frame 11, and the lower frame 12 is coupled to the movable side plate 14 in a state orthogonal to the upper frame 11. It has become so.

In particular, an actuator 15 (control motor in this example) for moving the movable side plate 14 along the guide rail 11A is attached to the cross member 11B of the upper frame 11, and thereby the lower frame coupled to the movable side plate 14 A head position changing mechanism for moving the groove forming head 13 in the longitudinal direction of the paved road (the front-rear direction of the construction vehicle 1) via 12 is configured.

The structure of the head position changing mechanism will be described in detail. The pair of left and right movable side plates 14 are connected by a connecting plate 16, and a nut 17 is attached to the connecting plate 16, and the nut 17 is a screw that is driven to rotate by an actuator 15. The shaft 18 (square screw in this example) is configured to be screwed.

  In particular, two actuators 15, screw shafts 18, and nuts 17 are provided in parallel. Among these, the nut 17 has a centering structure and constitutes a posture correcting means for correcting the inclination of the groove forming head 13 with respect to the transverse direction of the paved road.

  FIG. 5 is an enlarged view of the nut mounting portion as seen from above, and FIG. 6 shows a cross section taken along the line BB of FIG. As is apparent from these drawings, the nut 17 is pivotally attached to the holder 20 via the pivot 19, and the holder 20 is attached to the connecting plate 16 by a pair of upper and lower adjuster bolts 21. The connecting plate 16 and the holder 20 are provided with loose holes 16A and 20A for allowing the screw shaft 18 to pass therethrough. Therefore, the adjuster bolt 21 corresponding to either the left or right screw shaft 18 is manually rotated, or the other is driven while one of the actuators 15 is stopped, so that the holder 20 is rotated around the pivot 19. As a result, the inclination (orientation) of the groove forming head 13 with respect to the crossing direction of the paved road can be corrected via the connecting plate 16 or the like coupled to the holder 20.

  3 and 4, the movable side plate 14 includes a pair of upper and lower guide rollers 22A and 22B sandwiching a flange portion formed on the guide rail 11A of the upper frame 11 from the upper and lower directions, and the guide rail 11A. A guide roller 22C that comes into contact with the inner wall surface (the inner surface of the web) is provided. In addition, the contact pressure with respect to the guide rail 11A can be adjusted for these guide rollers 22A to 22C, and the movable side plate 14 can be smoothly moved along the guide rail 11A by the adjustment.

  Next, the structure of the lower frame will be described. The lower frame 12 is a rectangular frame formed by combining structural steel as shown in FIG. 7, and the two members on the long side are H-shaped steel, A guide rail 12A (H-type steel in this example) made of C-type steel, I-type steel or the like is used, and this is connected by a short-side cross member 12B to maintain a parallel state. Further, two mounting plates 12C projecting upward are fixed to the lower frame 12, and the mounting plates 12C are coupled to the movable side plate 14 as shown in FIG. 3 using bolts or the like.

  The lower frame 12 is assembled such that its guide rail 12A is orthogonal to the guide rail 11A of the upper frame 11, and a rack 23 is attached to the lower surface of the guide rail 12A along its longitudinal direction. Further, sensors (CCD camera S) for imaging the lower part (road surface part) are attached to both ends of the lower frame, and this is connected to a control unit (not shown).

The groove forming head 13 is suspended from the lower frame 12 via a pair of lower movable side plates 24 that move along the guide rails 12A. This allows the groove forming head 13 to cross the paved road (in the direction of the construction vehicle). A head feed mechanism for moving in the vehicle width direction) is configured.

The configuration of the head feeding mechanism will be described in detail. As shown in FIGS. 8 and 9, a pair of upper and lower guide rollers 25A sandwiching the flange portion formed on the guide rail 12A of the lower frame 12 from the upper and lower directions on the lower movable side plate 24. , 25B, and a guide roller 25C that contacts the outer wall surface of the guide rail 12A (the outer surface of the web). The contact pressures of the guide rollers 25A to 25C with respect to the guide rail 12A can be adjusted, and the lower movable side plate 24 can be smoothly moved along the guide rail 12A by the adjustment.

  The lower movable side plate 24 is provided with a pinion 26 that meshes with the rack 23 and an actuator 28 (hydraulic motor in this example) for rotating a rotating shaft 27 that fixes the pinion 26.

  Therefore, by driving the actuator 28, the lower movable side plate 24 and the groove forming head 13 held by the lower movable side plate 24 can be moved along the guide rail 12A.

  Here, the groove forming head 13 is configured by attaching a cutter blade 30 to a rotating shaft 29 provided between a pair of lower movable side plates 24. The cutter blade 30 is a circular rotary blade having a predetermined blade thickness. In this example, a plurality (16 in FIG. 3) of cutter blades 30 are arranged in parallel at predetermined intervals via spacers. . According to this, sound grooves corresponding to the number of cutter blades 30 and the blade thickness can be formed in parallel at set intervals by a single movement in the transverse direction of the paved road.

  On the other hand, as shown in FIG. 10, the lower movable side plate 24 has a configuration in which an upper plate 24 </ b> A and a lower plate 24 </ b> B are joined by pins 31, and the lower plate 24 </ b> B is swingable up and down around the pins 31. Then, while the groove forming head 13 is rotatably attached to the lower plate 24B, a head lifting mechanism for moving the groove forming head 13 in the vertical direction by connecting the upper plate 24A and the lower plate 24B by the linear actuator 32. It is composed. In this example, the linear actuator 32 is a double-ended clevis type double-acting cylinder, and both ends thereof are pin-joined to portions of the upper plate 24A and the lower plate 24B.

  According to this, the lower plate 24B can be swung downward by the extension of the linear actuator 32, and the cutter blade 30 protruding downward from the lower plate 24B can be strongly pressed against the road surface.

  A rolling roller 33 for adjusting the cutting amount of the cutter blade 30 with respect to the road surface is attached to the lower plate 24B, and the cutting amount of the cutter blade 30 with respect to the road surface can be adjusted by adjusting the height thereof. .

As shown in FIGS. 8 and 9, an actuator 34 (hydraulic motor in this example) for rotating the groove forming head 13 is attached to the lower plate 24B. Pulleys 35 and 36 are attached to the drive shaft and the rotary shaft 29 of the groove forming head, respectively, and a belt 37 is wound around the pulleys 35 and 36. Therefore, the rotation drive of the groove forming head 13 is performed by driving the actuator 34, instead of the meshed transmission systems of that kind, or employs a gear transmission system, or to employ a direct drive system by the actuator 34 You can also do things.

Here, a method of forming a sound groove on the road surface of the paved road using the apparatus configured as described above will be described. In addition, FIG. 11 is explanatory drawing which showed the process of forming a sound groove in order.
(1) Positioning of construction vehicle When the paved road to be constructed has many curved parts, first, an instruction line indicating the moving route of the construction vehicle is drawn at the center of the lane of the construction section. And the construction vehicle 1 can be made to go straight along a paved road by carrying out the automatic steering movement of the construction vehicle 1 along the instruction line. In addition, if it is a straight part, it can confirm whether the front-back direction of the construction vehicle 1 is parallel with a paved road visually without drawing an instruction line. Then, after moving the construction vehicle 1 to the construction start point (sound groove formation start position), the construction vehicle 1 is stopped, and at this time, the telescopic leg 3 is operated to lower the vehicle body 2 as a whole, and the groove formation head The distance between 13 and the road surface is about 10 to 15 mm.
(2) Position adjustment A pair of actuators 15 provided on the upper frame 11 are driven synchronously to move the lower frame 12 in the front-rear direction (longitudinal direction of the paved road), thereby adjusting the front-rear position of the groove forming head 13 relative to the road surface. Thereafter, the pair of actuators 15 are individually operated to correct the posture of the groove forming head 13 with respect to the crossing direction of the paved road (adjustment for directing the cutter blade 30 in the crossing direction of the paved road).
(3) Final fine adjustment The road surface image data obtained by a sensor (CCD camera S) (not shown) provided at both ends of the lower frame 12 is analyzed by a control unit (microcomputer), and the adjuster bolt 21 is adjusted based on the result. Operate and finely adjust the posture of the groove forming head 13 with respect to the crossing direction of the paved road. A mark indicating the crossing direction of the road surface is shown on the road surface in advance, and the final fine adjustment as described above is performed while capturing the mark with a CCD camera. The adjuster bolt 21 may be manually operated. Preferably, a control motor such as a stepping motor is used, and this is connected to the control unit so that the adjuster bolt 21 can be rotated automatically.
(4) Sound groove formation Once the position and posture of the groove forming head 13 are determined as described above, the cutter blade 30 is rotated and pressed against the road surface by the operation of the linear actuator 32, and then the actuator 28 is driven. The groove forming head 13 is moved along the lower frame 12 in the crossing direction of the paved road. The lower frame 12 is provided with a limit switch (not shown) in order to prevent overrun of the groove forming head 13, thereby determining the length of the sound groove. Although not shown in the figure, in the sound groove forming work by the cutter blade 30, a dustproof cover, an intake blower, a smoke treatment device, and the like are mounted on the construction vehicle 1.
(5) Second and subsequent sound groove formation When the first sound groove is formed as described above, the linear actuator 32 is operated while the construction vehicle 1 is stopped, and the groove forming head 13 is moved to the road surface. Then, the lower frame 12 is moved along the upper frame 11 in the longitudinal direction of the paved road by the synchronous drive of the actuator 15, and the above-described position adjustment (2) and final fine adjustment (3) are performed. By programming in advance, positioning can be determined only by final fine adjustment.
(6) Others When the lower frame 12 reaches the end of the upper frame 11 due to the formation of multiple sound grooves, the construction vehicle 1 is moved in the longitudinal direction of the paved road, and then the above (1) to (5 ) Is repeated.

  Although the present invention has been described above, when sound grooves are formed on a general paved road (especially an existing paved road), the operation is performed within a range where lane regulation is performed so as not to hinder the passage of general vehicles. The Further, the length of the lower frame 12 can be adjusted to the working band width by confirming the width of the paved road to be constructed in advance and adding an attachment.

Meanwhile, in the above example, it is assumed that the groove forming head 13 is composed of a plurality of cutter blades 30, it is also possible to configure this in a single cutter blade.

The side view which shows the structural example of the sound groove formation apparatus which concerns on this invention Top view of the upper frame constituting the device Front view showing the device part of the groove forming head Partial expanded sectional view in the AA line of FIG. Explanatory drawing showing a part of this device enlarged BB sectional view of FIG. Plan view of the lower frame constituting this device Side view showing the device part of the groove forming head Partial expanded sectional view in the CC line of FIG. Operation explanatory view showing the device portion of the groove forming head Explanatory drawing which showed process to form sound groove in order

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Construction vehicle 10 Groove formation unit 11 Upper frame 11A Guide rail ( 1st guide rail )
12 Lower frame 12A Guide rail ( second guide rail )
13 Groove forming head 14 Movable side plate 15 Actuator (head moving motor with respect to the longitudinal direction of the road)
18 Screw shaft (feed screw)
23 Rack 24 Lower movable side plate 28 Actuator (Motor for moving the head in the crossing direction of the road)
30 Cutter blade 32 Direct acting actuator (head lift cylinder)

Claims (1)

A device for forming a plurality of sound grooves on the road surface of a paved road for generating a vibration sound that is heard as a predetermined melody by traveling of a road-passing vehicle,
A groove forming head having a cutter blade that is installed in the lower part of the vehicle body in a predetermined construction vehicle and moves in the transverse direction of the paved road to form the sound groove in the same direction;
Posture correcting means for correcting the direction of the groove forming head with respect to the transverse direction of the paved road in a state where the construction vehicle is stopped on the paved road;
A head feed mechanism that moves the groove-forming head in the crossing direction of the paved road while the construction vehicle is stopped on the paved road;
A head lifting mechanism for moving the groove forming head in the vertical direction;
And a head position changing mechanism for moving in the longitudinal direction of the paved road the groove forming head in a state of stopping the construction vehicle on the pavement,
The head position changing mechanism includes an upper frame forming a first guide rail, a pair of left and right movable side plates guided by the first guide rail, and the movable side plate along the first guide rail. A pair of left and right actuators to be moved,
The head feed mechanism includes a lower frame that forms a second guide rail orthogonal to the first guide rail and is coupled to the movable side plate, and a pair of front and rear lower portions that move along the second guide rail. A movable side plate,
The groove forming head is held by the lower movable side plate,
The posture correcting means includes a pair of parallel screw shafts that are individually driven to rotate by the pair of actuators, a pair of nuts into which the screw shafts are screwed, and a pair of the nuts that are rotatably attached. The sound groove forming apparatus on a paved road is characterized in that the holding tool is attached to a connecting plate that connects the pair of movable side plates with an adjuster bolt .

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