JP2005171536A - Curve paving machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a curve paving machine capable of saving labor for working by performing spraying operation of emulsion on a road surface together with a curve paving operation. <P>SOLUTION: When a stop valve 51 is opened, the emulsion N in an emulsion tank 3 flows in a pipe 5, and is sprayed from an emulsion spraying nozzle 4 onto the road surface L. An asphalt mixture K thrown from a hopper 11 into a conveyor storage cylinder 18 is pushed out to a molding chamber 13 by a screw conveyor 12 to mold a curve K1. The curve paving machine 1 is advanced by a reaction produced when the asphalt mixture K is pushed out from a molding chamber 13a, and the molded asphalt mixture K is discharged from the rear end opening 13a2 of the molding chamber 13a. This operation is continuously performed to pave the curve K1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a curve paving machine for continuously paving a curve (curbstone of a road) by advancing while molding a material such as asphalt mixture or cement concrete with a molding frame.

  Conventionally, as this type of curve paving machine, there is a curve paving machine 1 whose appearance is shown in FIG. 2A is a plan view of the curve paving machine 1, and FIG. 2B is a side view of the curve paving machine 1. FIG.

  In the curve paving machine 1, materials such as asphalt mixture and cement concrete are supplied from the hopper 11 to the screw conveyor 12. The screw conveyor 12 is rotated at a low speed by the drive of the engine M, and the material supplied from the hopper 11 is fed backward by the screw conveyor 12 and pushed into the molding chamber 13. The molding chamber 13 is a molding frame for molding the curve K1, and the material extruded into the molding chamber 13 is compacted into a specified shape. The curve paving machine 1 moves forward by a reaction force generated when the material is pushed out of the molding chamber 13, and sends the molded material to the rear of the molding chamber 13. By continuously performing the molding, the curve K1 is continuously paved on the road surface L.

  It is considered that materials such as asphalt mixture and cement concrete constituting the curve K1 have poor adhesiveness with the existing road surface L and can be easily peeled off from the road surface L due to an impact applied from the outside. For this reason, in paving work using an asphalt finisher that pavers asphalt mixture on the road surface, as shown in Patent Document 1 and Patent Document 2 below, after the emulsion is sprayed on the pavement area in advance with a spray bar, By spreading the material, the asphalt mixture is prevented from peeling off from the road surface.

Even when the curve K1 is paved, the paved curve K1 is prevented from being peeled off the road surface L by pre-spreading the emulsion on the pavement location on the road surface L and then molding the material onto the road surface L. In the paving work using the conventional curve paving machine 1, the emulsion is sprayed onto the road surface L manually.
Japanese Patent No. 34163838 (paragraph [0019]) JP-A-4-203006 (Page 3, lower left column and lower right column)

  However, the dispersion of the emulsion onto the road surface L by human power is a laborious operation. For this reason, labor saving was desired.

  The present invention has been made to solve such a problem. The material supplied from the hopper is extruded into a molding frame by a material extruding means, and the material is pressed into a specified shape by the molding frame. A curve paving machine that advances by an extruding reaction force and paves a continuous curve on a road surface, comprising an emulsion spraying device that sprays an emulsion onto a road surface in front of the paved position of the curve. The emulsion spraying device includes, for example, an emulsion tank for storing the emulsion, a nozzle for spraying the emulsion from the emulsion tank to the road surface, and an intermittent means for interrupting the flow of the emulsion from the emulsion tank to the nozzle. The

  According to this configuration, the emulsion is sprayed by the emulsion spraying device on the road surface ahead of the paved position of the curve. When the emulsion spraying device has the above-described configuration, the emulsion stored in the emulsion tank is flowed to the nozzle by the intermittent means, and the emulsion is sprayed onto the road surface by the nozzle. For this reason, the curve paving machine can disperse the emulsion on the road surface along with the curve paving work. Therefore, it is not necessary to spray the emulsion manually as in the prior art, and the labor can be saved.

  The present invention also includes a travel detection means for detecting the travel of the curve paving machine, and the emulsion spraying device causes the emulsion to flow to the nozzle by the intermittent means while the travel of the curve paving machine is detected by the travel detection means. And spraying the emulsion.

  According to this configuration, when the traveling detection unit detects the traveling of the curve paving machine, the spraying of the emulsion from the nozzle is started, and when the traveling of the curve paving machine is not detected, the spraying of the emulsion from the nozzle is stopped. Is done. Accordingly, during curve paving work performed while the curve paving machine is running, the emulsion is automatically sprayed on the road surface, so that further labor saving can be achieved. Further, since the emulsion is sprayed on the road surface only during the curve paving operation, the amount of the emulsion used can be limited to the amount necessary for the curve paving, and the wasteful use of the emulsion can be prevented.

  The present invention is also characterized in that the emulsion spraying device includes a pressurizing means for pressurizing the inside of the emulsion tank.

  According to this configuration, a viscous emulsion can be uniformly distributed on the road surface by pressurizing the inside of the emulsion tank by the pressurizing means. For this reason, the work of uniformly spreading the dispersed emulsion on the road surface can be omitted, and the labor can be saved.

  In addition, the present invention is characterized in that the emulsion spraying device is provided with coating means capable of coating the emulsion sprayed on the road surface onto the road surface and adjusting the height with respect to the road surface.

  According to this configuration, the emulsion dispersed on the road surface is uniformly applied to the road surface by the coating means. For this reason, the work of applying the dispersed emulsion to the road surface can be omitted, and the work can be saved. Further, by adjusting the height of the coating means with respect to the road surface according to the road surface condition etc. where the curve is paved, the emulsion can be uniformly applied to the road surface regardless of the road surface condition etc. where the curve is paved.

  According to the present invention, as described above, the emulsion is sprayed onto the road surface together with the paving work of the curve, so that labor saving can be achieved.

  Next, the best mode for carrying out the present invention will be described.

  FIG. 2A is a plan view showing the appearance of the curve paving machine 1a according to the embodiment of the present invention, and FIG. 2B is a side view showing the appearance of the curve paving machine 1a shown in FIG. is there. Moreover, FIG. 3 is a figure explaining the outline of a structure of the curve paving machine 1a. In FIGS. 2 and 3, the same or corresponding parts as those in FIG.

  As shown in FIGS. 2 and 3, the curve paving machine 1 a is provided with a hopper 11 on which a material K such as asphalt mixture or cement concrete is loaded at the center of the vehicle body. As for the hopper 11, the lower end opening part 11a is opening in the left side bottom part of the width direction of a vehicle body. A screw conveyor 12 for conveying the material K dropped from the hopper 11 is provided further below the lower end opening 11a. A molding chamber 13 that covers the rear end of the screw conveyor 12 and molds the material K into the shape of the curve K1 is provided behind the screw conveyor 12. The screw conveyor 12 has a front half disposed in a conveyor housing cylinder 18 provided below the lower end opening 11a, and is configured by forming screw blades 12b on the outer periphery of the screw shaft 12a. The screw conveyor 12 rotates the screw blade 12b as the screw shaft 12a rotates at a constant speed by the drive of the engine M provided at the rear of the vehicle body, and moves the material K dropped from the hopper 11 into the conveyor accommodating cylinder 18 to the rear. The material extruding means for extruding to the molding chamber 13 is configured. The driving force of the engine M is input to the screw shaft 12a by operating a clutch lever 17 provided between the engine M and the hopper 11.

  The curve paving machine 1a is provided in front of the vehicle body when the vehicle is supported between the pair of front traveling wheels 14a and 14a, the rear moving wheel 14b and the auxiliary wheel 14c on the existing road surface L when moving between work sites. The direction of travel is adjusted by operating the handle 15, and the wheels 14a to 14c rotate to travel. The traveling wheels 14a and 14a and the moving wheel 14b are moved up and down in accordance with the operation of three wheel lifting handles 16a provided at the front and rear of the vehicle body, and the auxiliary wheel 14c is moved up and down by a wheel lifting lever 16b provided at the right side at the rear of the vehicle body. . When paving the curve K1, the wheels 14a to 14c are raised to the positions indicated by the solid lines in FIG. 2B by operating the wheel lifting handles 16a and the wheel lifting lever 16b, and the height of the vehicle body relative to the road surface L is adjusted to be low. The

  FIG. 4A is a side view of the molding chamber 13, and FIG. 4B is a cross-sectional view of the molding chamber 13.

The molding chamber 13 is configured by covering the periphery of a molding chamber 13a for molding the material K with a heating chamber 13b. The molding chamber 13a is open at the lower end and has a cross-sectional shape that defines the cross-sectional shape of the curve K1 to be paved. Material K is extruded from the front opening 13a ₁ into the molding chamber 13a, and is discharged from the rear end opening 13a ₂ to the outside. Heating chamber 13b is configured to cover the sides and the top surface of the molding chamber 13a, gas inlet 13b ₁ which hot exhaust gases of the engine M flows is formed on the upper surface, the gas in the heating chamber 13b is discharged Gas discharge ports 13b ₂ and 13b ₂ are formed at lower portions on both side surfaces. The heating chamber 13b is heated by the high-temperature exhaust gas flowing through the heating chamber 13b.

  Further, as shown in FIGS. 2 and 3, an emulsion spraying device 2 for spraying the emulsion N onto the road surface L is mounted on the front of the vehicle body in front of the hopper 11. FIG. 5 is a diagram showing an outline of the configuration of the emulsion spraying device 2. 6A is a perspective view showing an outline of the configuration of the emulsion tank 3 provided in the emulsion spraying apparatus 2, and FIG. 6B is a perspective view showing an outline of the configuration of the pipe P inserted through the emulsion tank 3. is there.

  The emulsion spraying device 2 is provided in the emulsion tank 3 that contains the emulsion N, the emulsion spray nozzle 4 that sprays the emulsion N, the pipe 5 that connects the emulsion spray nozzle 4 and the emulsion tank 3, and the pipe 5. And an emulsion coating brush 6 for coating the road surface L with the emulsion N sprayed from the emulsion spraying nozzle 4.

  The emulsion tank 3 contains the emulsion N therein, and as shown in FIG. 6A, a cylindrical through hole 31 is formed from one side of the square box to the other side. A pipe P through which the high-temperature exhaust gas of the engine M circulates is inserted into the cylindrical through hole 31, and heat exchange is performed between the emulsion N in the emulsion tank 3 and the exhaust gas of the engine M, as shown in FIG. And the emulsion N is heated. The pipe P has a shape in which a portion inserted through the cylindrical through hole 31 has a diameter larger than that of other portions.

  As shown in FIG. 2, the pipe 5 extends from the lower side of the emulsion tank 3 to the left side of the vehicle body and then downwards. The emulsion spray nozzle 4 is attached to the tip of the pipe 5. The emulsion spray nozzle 4 is attached to a vehicle body frame located on the extension of the axis of the screw conveyor 12 in front of the screw conveyor 12. The cock 51 constitutes an intermittent means for interrupting the flow of the emulsion N from the emulsion tank 3 to the emulsion spraying nozzle 4, and is provided at the end of the pipe 5 on the emulsion tank 3 side. The cock 51 is used to adjust the amount of emulsion flowing through the pipe 5, that is, the amount of emulsion discharged from the emulsion spraying nozzle 4.

  The emulsion coating brush 6 is attached to the body frame slightly behind the emulsion spray nozzle 4 with a bolt so that the tip is positioned slightly behind the spray position of the emulsion N by the emulsion spray nozzle 4. The emulsion application brush 6 constitutes application means for applying the emulsion N sprayed by the emulsion spray nozzle 4 to the road surface L, and is configured so that the height relative to the road surface L can be adjusted by loosening the bolt. Has been.

  Next, operation | movement of the curve paving machine 1 by this embodiment is demonstrated.

  First, the operator moves the curve paver 1 to the pavement location of the curve K1, and the engine M is started. Then, when the operator operates the wheel lifting handle 16a and the wheel lifting lever 16b, the vehicle body is lowered, and the vehicle body position relative to the road surface L changes from the position indicated by the two-dot chain line in FIG. 2B to the solid line in FIG. The screw conveyor 12 and the molding chamber 13 are positioned in the vicinity of the road surface L. Here, when the operator opens the cock 51, the emulsion N accommodated in the emulsion tank 3 flows through the pipe 5 at a flow rate corresponding to the opening of the cock 51, and is discharged from the emulsion spraying nozzle 4 to the road surface. Scattered over L. Further, when the operator operates the clutch lever 17 to input the driving force of the engine M to the screw conveyor 12, the screw shaft 12a of the screw conveyor 12 starts to rotate. Thereafter, as schematically shown in FIG. 3, the material K loaded in the hopper 11 is dropped into the conveyor accommodating cylinder 18 and pushed out to the rear molding chamber 13 by the screw blades 12 b of the screw conveyor 12.

Material K extruded into the molding chamber 13, enters the molding chamber 13a from the front end opening 13a ₁ of the molding chamber 13a. The material K that has entered the molding chamber 13a is molded into a curve K1 having the same cross-sectional shape as that of the molding chamber 13a. At this time, since the heating chamber 13b is heated by the high-temperature exhaust gas, the material K is prevented from adhering to the molding chamber 13b. Curve paving machine 1a is advanced by the reaction force generated when extruding the material K from the molding chamber 13a, Accordingly, molded material K is discharged from the rear end opening 13a ₂ of the molding chamber 13a. By performing this molding continuously, the curve K1 is continuously paved. At this time, while the cock 51 is open, the emulsion N is continuously sprayed from the emulsion spray nozzle 4, and the sprayed emulsion N is sprayed by the emulsion coating brush 6 that slides on the road surface L as the curve paving machine 1 advances. It is applied to the road surface L.

  Thus, in the curve paving machine 1a according to the present embodiment, when the operator opens the cock 51, the emulsion N is sprayed from the emulsion spray nozzle 4 on the road surface L in front of the paving position of the curve K1. For this reason, the material K molded into the curve K1 in the molding chamber 13 is firmly bonded to the road surface L by the emulsion N. Therefore, when an external force is applied to the molded curve K1, it is possible to avoid the curve K1 from being easily separated from the road surface L. Further, in the curve paving machine 1 according to the present embodiment, the emulsion N can be sprayed onto the road surface L along with the paving work of the curve K1, so that labor saving of the curve paving work can be achieved. Further, since the emulsion N sprayed on the road surface L by the emulsion spray nozzle 4 is uniformly applied to the road surface L by the emulsion coating brush 6, the work of uniformly applying the dispersed emulsion N to the road surface L can be omitted. In addition, the labor can be saved. In addition, since the emulsion N applied by the emulsion coating brush 6 conforms to the road surface L, the adhesiveness of the asphalt mixture K to the road surface L can be improved.

  FIG. 7 is a diagram schematically illustrating the configuration of an emulsion spraying apparatus 2a according to a modification of the curve paving machine 1a according to the present embodiment. In the figure, the same or corresponding parts as in FIG.

  The emulsion spraying device 2 a includes an air compressor unit 7 as a pressurizing unit that pressurizes the inside of the emulsion tank 3. The air compressor unit 7 includes an air compressor 71 that compresses air with the power of the engine M, an accumulator 72 that temporarily stores the compressed air generated by the air compressor 71, and a check that prevents a backflow of the compressed air from the accumulator 72. And a valve 73. The accumulator 72 is connected to the internal space of the emulsion tank 3 by a pipe 64, and supplies compressed air having a flow rate corresponding to the opening of a valve 65 provided in the pipe 64 into the emulsion tank 3. Pressurize the inside.

  Further, the emulsion spraying device 2 a of this embodiment includes a filter 52. The filter 52 is for removing dust in the emulsion N flowing through the pipe 5, and is provided in the pipe 5 between the cock 51 and the emulsion spraying nozzle 4. The emulsion tank 3 is provided with a pressure gauge 32. The pressure gauge 32 is for displaying the pressure in the internal space of the emulsion tank 3.

  When the operator opens the valve 65 provided in the pipe 64, compressed air having a flow rate corresponding to the opening degree of the valve 65 is supplied from the accumulator 72 into the emulsion tank 3, and the inside of the emulsion tank 3 is pressurized. When the operator opens the cock 51 at the paved portion of the curve K1, the emulsion N pressurized in the emulsion tank 3 flows through the pipe 5 and is sprayed onto the road surface L from the emulsion spray nozzle 4. At this time, dust in the emulsion N is removed by the filter 52 and the clogging of the emulsion spray nozzle 4 is prevented. Then, the emulsion N having a flow rate corresponding to the opening degree of the cock 51 by the operation of the operator circulates in the pipe 5 and is continuously sprayed from the emulsion spray nozzle 4 while the cock 51 is open.

  In the curve paving machine 1a equipped with such an emulsion spraying device 2a, the emulsion N in the emulsion tank 3 is pressurized by the air compressor unit 7. Therefore, even the viscous emulsion N can be uniformly ejected from the emulsion spray nozzle 4 and sprayed uniformly on the road surface L. Accordingly, it is possible to omit the work of uniformly spreading the dispersed emulsion N onto the road surface L, and to save labor.

  Here, the case where the air compressor unit 6 is used as the pressurizing means in the emulsion tank 3 has been described. However, even if the inside of the emulsion tank 3 is pressurized using manual pressurizing means such as tire filling. Good. In this case, a valve (tire side valve) is provided on the emulsion tank 3 side in order to prevent air from leaking from the emulsion tank 3 to the outside.

  In the above embodiment, the case where the cock 51 is manually opened and closed by the operator has been described. However, for example, the emulsion N may be automatically sprayed from the emulsion spray nozzle 4 while the curve paving machine 1 is running.

  For example, the emulsion spraying device 2 is composed of a detection means such as a vehicle speed sensor that detects the traveling of the curve paving machine 1 and a microcomputer that adjusts the opening of the cock 51 according to the detection result of the vehicle speed sensor. While the traveling of the curve paving machine 1 is detected by the detecting means, the opening of the cock 51 may be adjusted by the control of the control device, and the emulsion N may be sprayed by the emulsion spraying nozzle 4. When the controller detects the traveling of the curve paving machine 1 by the detecting means, the controller 51 opens the cock 51 and adjusts the opening of the cock 51 in accordance with the traveling speed to spray the emulsion N from the emulsion spraying nozzle 4. While the curve paving machine 1 is traveling, the emulsion N is continuously sprayed by the emulsion spray nozzle 4. When the traveling of the curve paving machine 1 is no longer detected by the detection means, the control device closes the cock 51 and stops spraying the emulsion N from the emulsion spraying nozzle 4.

  According to this configuration, while the traveling of the curve paving machine 1 is detected by the detection means, the emulsion N is sprayed by the control of the control device, so the curve paving machine 1 travels for the paving work of the curve K1. In this case, the emulsion N is automatically spread on the road surface L. Therefore, the opening and closing of the cock 51 and the adjustment of the opening can be performed without human power, and further labor saving can be achieved. Further, since the emulsion N is sprayed on the road surface L only during the pavement operation of the curve K1, the use amount of the emulsion N can be limited to the amount necessary for the pavement of the curve K1, and use of the emulsion N can be prevented.

  Further, in the above-described embodiment, the case where the emulsion spraying devices 2 and 2a are provided with the emulsion coating brush 6 that coats the road surface L with the emulsion N sprayed by the emulsion spray nozzle 4 has been described. In terms of labor saving and improvement in the adhesion of the asphalt mixture K to the road surface L, it is preferable that the emulsion spraying device 2 includes the emulsion coating brush 6. The emulsion coating brush 6 is not necessarily provided as long as it can be uniformly dispersed and sufficient adhesiveness can be obtained.

  In the above embodiment, the case where the emulsion tank 3 is provided at the front of the vehicle body in front of the hopper 11 in the curve paving machine 1 has been described. However, the emulsion tank 3 is not necessarily provided in front of the hopper 11 and may be provided between the hopper 11 and the engine M, for example. Moreover, although the said embodiment demonstrated the case where the emulsion tank 3 and the nozzle 4 for emulsion dispersion | distribution were connected by the piping 5, you may connect with a hose.

  In the above embodiment, the case where the emulsion tank 3 is mounted on the vehicle body of the curve paving machine 1 has been described. However, for example, when the emulsion tank 3 cannot be directly mounted on the vehicle body of the curve paving machine 1 due to the large size of the emulsion tank 3, the emulsion tank 3 is mounted on a moving table that follows the vehicle body of the curve paving machine 1. Also good. In the above embodiment, the case where the emulsion coating brush 6 is used as the coating means for coating the emulsion has been described. However, the application means is not limited to the emulsion spraying brush 6, and for example, the emulsion may be applied to the road surface L using a roller.

  In the said embodiment, although the case where the curve paving machine by this invention was applied to the curve paving machine 1a which extrudes the material K to the molding chamber 13 with the screw conveyor 12 was demonstrated, for example, material K is expanded and contracted by a hydraulic cylinder etc. It is also possible to apply the present invention to other curve paving machines such as a curve paving machine that pushes the mold into the molding chamber 13. Even when the present invention is applied to such a curve paving machine, the same effects as those of the above-described embodiment can be obtained.

It is a figure which shows the external appearance of the conventional curve paving machine, (a) is a top view, (b) is a side view. It is a figure which shows the external appearance of the curve paving machine by one Embodiment of this invention, (a) is a top view, (b) is a side view. It is a figure which shows the outline of a structure of the curve paving machine by one Embodiment of this invention. It is a figure which shows the cross-sectional shape of the molding chamber of the curve paving machine by one Embodiment of this invention, (a) is a side view, (b) is a cross-sectional view. It is a figure which shows the outline of a structure of the emulsion spraying apparatus of the curve paving machine by one Embodiment of this invention. It is a perspective view which shows the outline of a structure of the emulsion tank of the emulsion spraying apparatus shown in FIG. It is a figure which shows the outline of the emulsion spraying apparatus by a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a ... Curve paving machine 2, 2a ... Emulsion spray device 3 ... Emulsion tank 31 ... Cylindrical through-hole 32 ... Pressure gauge 4 ... Emulsion spray nozzle 5 ... Piping 51 ... Cock 52 ... Filter 6 ... Emulsion application brush 7 ... Air Compressor unit 71 ... Air compressor 72 ... Accumulator 73 ... Check valve

Claims (5)

The material supplied from the hopper is extruded into the molding frame by the material extrusion means, and the material is pressed into the specified shape with this molding frame. In the machine
A curve paving machine comprising an emulsion spraying device for spraying an emulsion onto a road surface in front of the curve paving position.   The emulsion spraying device comprises an emulsion tank for storing emulsion, a nozzle for spraying emulsion from the emulsion tank to the road surface, and an intermittent means for intermittently flowing the emulsion from the emulsion tank to the nozzle. The curve paving machine according to claim 1, wherein: Provided with a traveling detection means for detecting the traveling of the curve paving machine,
3. The emulsion spraying device sprays the emulsion by flowing the emulsion to the nozzle by the intermittent means while the running of the curve paving machine is detected by the running detection means. Curve paving machine.   4. The curve paving machine according to claim 2, wherein the emulsion spraying device includes a pressurizing unit that pressurizes the inside of the emulsion tank.   The said emulsion dispersion | distribution apparatus is equipped with the application means which can adjust the height with respect to a road surface while apply | coating the emulsion spread | diffused on the road surface to the road surface, The any one of Claims 1-4 characterized by the above-mentioned. Curve paving machine.

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