Tire roller and tire heating method for tire roller

Abstract

To provide a tire roller and a tire heating method for a tire roller, which can prevent asphalt mixture from adhering to a tire with appropriate heating time.SOLUTION: A tire roller (100) compacts asphalt mixture with a tire (10), and the tire roller (100) includes a temperature measurement part (20) that measures the surface temperature of the tire (10), and a tire heating part (30) that heats the tire (10) based on the surface temperature measured by the temperature measurement part (20).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a tire roller and a tire heating method for a tire roller. [Background technology]

[0002] When paving an asphalt mixture layer on a road or the like, the heated asphalt mixture is spread evenly on the construction surface using an asphalt finisher, and then compacted and hardened to form an asphalt mixture layer. For the initial compaction, a steel wheel roller is used, and for the secondary compaction, a tire roller is used. When using the tire roller, water or an anti-adhesion agent is sprayed onto the surface of the asphalt mixture layer to prevent the asphalt mixture from adhering to the tire surface. Furthermore, because low tire temperatures make the asphalt mixture more likely to adhere to the tire surface, it has also been proposed to heat the tires using a gas burner or heated steam (see, for example, Patent Documents 1-3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 2602688 [Patent Document 2] Jikko No. 48-044005 [Patent Document 3] Japanese Patent Application Laid-Open No. 2008-285915 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in environments with low outside temperatures, such as in winter, the tires may not be sufficiently heated for a while after the start of secondary compaction with a tire roller, resulting in the asphalt mixture adhering to the tire surface. Furthermore, because the asphalt mixture adheres if the tire heating time is short, the tire heating time before compaction begins must be set long enough, which poses problems from the perspectives of shortening work time and saving energy.

[0005] The present invention has been made in consideration of the above-mentioned conventional problems, and aims to provide a tire roller and a tire heating method for a tire roller that can prevent the adhesion of asphalt mixture to tires by heating for an appropriate time. [Means for solving the problem]

[0006] In order to solve the above problems, the tire roller of the present invention is a tire roller that compacts an asphalt mixture using a tire, and is characterized by comprising a temperature measurement unit that measures the surface temperature of the tire, and a tire heating unit that heats the tire based on the surface temperature measured by the temperature measurement unit.

[0007] In the tire roller of the present invention, the temperature measuring unit measures the surface temperature of the tire, and the tire heating unit heats the tire based on the surface temperature, so that an appropriate heating time can be provided to prevent the asphalt mixture from adhering to the tire.

[0008] In one aspect of the present invention, the tire heating section is an electric heater.

[0009] In one aspect of the present invention, the tire heating portion is disposed opposite to the surface of the tire.

[0010] In one aspect of the present invention, the tire heating portion is disposed on a rim portion of the tire to heat the rim portion.

[0011] In one aspect of the present invention, a liquid heat medium is stored inside the tire, and the tire heating section heats the liquid heat medium.

[0012] In one aspect of the present invention, the tire heating portion is arranged inward from an outer periphery of the tire along the circumferential direction.

[0013] In one aspect of the present invention, the tire heating section starts heating when the surface temperature is 70° C. or lower, and stops heating when the surface temperature is 180° C. or higher.

[0014] In addition, in order to solve the above-mentioned problems, the tire heating method for a tire roller of the present invention is a tire heating method for a tire roller that compacts an asphalt mixture using a tire, and is characterized by comprising a temperature measurement step of measuring the surface temperature of the tire, and a tire heating step of heating the tire based on the surface temperature measured in the temperature measurement step. [Effects of the Invention]

[0015] The present invention can provide a tire roller and a tire heating method for a tire roller that can prevent adhesion of an asphalt mixture to a tire by heating for an appropriate time. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a block diagram showing an example of the configuration of a pneumatic tire roller 100 according to a first embodiment. [Figure 2] 3 is a flowchart showing a tire heating method for the pneumatic tire roller 100 according to the first embodiment. [Figure 3] 1 is a schematic diagram showing a configuration example of a pneumatic tire roller 100 according to a first embodiment. [Figure 4] FIG. 4 is a schematic diagram showing a configuration example of a pneumatic tire roller 100 according to a second embodiment. [Figure 5] FIG. 10 is a schematic diagram showing a configuration example of a pneumatic tire roller 100 according to a third embodiment. [Figure 6] FIG. 10 is a schematic diagram showing an example of the configuration of a pneumatic tire roller 100 according to a fourth embodiment. [Figure 7] FIG. 10 is a schematic diagram showing a configuration example of a pneumatic tire roller 100 according to a fifth embodiment. [Figure 8] 1 is a schematic diagram showing an example of the structure of a tire 10 and an electric heating wire heater 35. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0017] (First embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. The same or equivalent components, members, and processes shown in each drawing will be assigned the same reference numerals, and duplicate explanations will be omitted where appropriate. FIG. 1 is a block diagram showing an example configuration of a tire roller 100 according to this embodiment. As shown in FIG. 1, the tire roller 100 of this embodiment includes a tire 10, a temperature measurement unit 20, a tire heating unit 30, and a temperature control unit 40. The tire roller 100 includes a vehicle body 50, as will be described later, and is a device that compacts an asphalt mixture that has been spread evenly on a construction surface using the tire 10.

[0018] The tires 10 are wheels that come into contact with the surface of the laid asphalt mixture layer and rotate as the tire roller 100 operates. The tires 10 are used as the front and rear wheels of the tire roller 100, and in one example, three tires 10 are provided on the front wheels and four on the rear wheels. There are no limitations on the shape or material of the tires 10, but in order to achieve the flatness required for secondary rolling compaction, it is preferable to use a rubber material to form an outer circumferential surface with few irregularities. There are also no limitations on the internal structure of the tire 10, but a structure in which a cavity is provided inside and filled with air can be used.

[0019] The temperature measurement unit 20 is a part that measures the surface temperature of the tire 10. The specific configuration of the temperature measurement unit 20 is not limited, and a contact or non-contact thermometer can be used. A thermocouple, a resistance temperature detector, a thermistor, or the like can be used as a contact thermometer. A radiation temperature sensor or the like can be used as a non-contact thermometer. Here, the surface temperature of the tire 10 refers to the temperature of the object to be controlled to an appropriate temperature, and refers to the temperature of the outer circumferential surface of the tire 10 that comes into contact with the asphalt mixture. The position at which the surface temperature is measured on the tire 10 is not limited, but is preferably near the contact surface of the tire 10 in order to control the temperature immediately before contact with the asphalt mixture to an appropriate range. The temperature measurement unit 20 may be provided on some of the multiple tires 10, or on all of the tires 10.

[0020] The tire heating unit 30 is a part that heats the tire 10 to increase the temperature of the tire surface. The tire heating unit 30 is controlled to start and stop heating by a temperature control unit 40, as described below. The tire heating unit 30 is provided on all tires 10. The specific configuration of the tire heating unit 30 is not limited, and an electric heater, a gas burner, a heated steam ejection device, etc. can be used, but it is preferable to use an electric heater from the viewpoints of size reduction, weight reduction, temperature control accuracy, etc. As the electric heater, a contact heater using resistance heating or a non-contact heater using radiation heating can be used. The position at which the tire heating unit 30 is disposed is not limited, but it is preferable that it be a position where heat can be efficiently transferred to the outer circumferential surface of the tire 10.

[0021] The temperature control unit 40 is a part that controls heating and stopping of the tire heating unit 30 based on the surface temperature of the tire 10 measured by the temperature measurement unit 20. The configuration of the temperature control unit 40 is not limited, but one example includes a CPU (Central Processing Unit) for information processing, a memory device, a recording medium, an information communication device, etc. The temperature control unit 40 acquires the surface temperature from the temperature measurement unit 20 according to a predetermined program and controls the driving of the tire heating unit 30.

[0022] 2 is a flowchart showing the tire heating method according to this embodiment for the tire roller 100. The tire heating method according to this embodiment is started by the temperature control unit 40 when the operation of the tire roller 100 is started, and is executed continuously until the operation of the tire roller 100 is stopped.

[0023] 2, when the tire heating method starts, in the temperature measurement process of step S1, the temperature measurement unit 20 measures the surface temperature of the tire 10. The surface temperatures of the tires 10 measured in the temperature measurement process may be a selected portion of the multiple tires 10, or may be all of the multiple tires 10 provided on the tire roller 100. Also, the surface temperatures of all the tires 10 may be measured and an average value or the like may be used as the measured temperature, or the measured temperature of each tire 10 may be used individually as the measured temperature. After the temperature control unit 40 acquires the measured temperature, the process proceeds to step S2.

[0024] Next, in the heating determination step of step S2, the temperature control unit 40 determines whether the acquired surface temperature of the tire 10 is equal to or lower than a predetermined threshold value T1. If the surface temperature is equal to or lower than the threshold value T1, the process proceeds to step S3, and if the surface temperature is higher than the threshold value T1, the process proceeds to step S4. Here, the value of the threshold value T1 can be 70°C, preferably 80°C, and more preferably 100°C. By setting the threshold value T1 to such a value, heating of the tire 10 can be started when there is a high possibility that the asphalt mixture will adhere to the tire 10. This makes it possible to prevent a large difference between the surface temperature of the tire 10 and the temperature of the asphalt mixture applied on the tire 10, causing the asphalt mixture to cool rapidly and increase in viscosity, which can cause the asphalt mixture to adhere to the tire 10 and easily peel off.

[0025] Next, in the tire heating step of step S3, the temperature control unit 40 controls the tire heating unit 30 to heat the tire 10. Here, the tire heating unit 30 may heat all the tires 10 uniformly, or may selectively heat only the tires 10 whose surface temperatures are equal to or lower than the threshold value T1. Furthermore, the tire heating unit 30 may keep the output (amount of heat applied) of the tire 10 constant, or may adjust the output depending on the surface temperature. After the tire heating unit 30 heats the tire 10, the process returns to step S1.

[0026] Next, in the heating stop determination step of step S4, the temperature control unit 40 determines whether the acquired surface temperature of the tire 10 is equal to or higher than a predetermined threshold value T2. If the surface temperature is equal to or higher than the threshold value T2, the process proceeds to step S5, and if the surface temperature is lower than the threshold value T2, the process proceeds to step S6. Here, the value of the threshold value T2 can be 180°C, preferably 140°C, and more preferably 120°C. By setting the threshold value T2 to such a value, heating of the tire 10 can be stopped when there is a low possibility that an asphalt mixture will adhere to the tire 10.

[0027] Next, in the heating stopping step of step S5, the temperature control unit 40 controls the tire heating unit 30 to stop heating the tire 10. Here, it is preferable to stop heating in the tire heating unit 30 by selecting only tires 10 whose surface temperatures are equal to or higher than the threshold value T2. During the secondary rolling compaction operation, the surface of the tire 10 continues to be heated by the asphalt mixture layer, which is hotter than the surface temperature of the tire 10. Therefore, even if heating by the tire heating unit 30 is stopped to reduce energy consumption, the surface temperature of the tire 10 is unlikely to drop and the asphalt mixture will adhere to the tire 10.

[0028] Furthermore, when heating in the tire heating unit 30 is stopped, the temperature control unit 40 may use a separately provided notification unit to notify the operator of the tire roller 100 that heating has stopped. There are no limitations on the method for notifying the operator that heating has stopped using the notification unit, and visual notification such as lighting up a lamp or displaying an image, or auditory notification using a buzzer sound may be used. After heating in the tire heating unit 30 is stopped, the process proceeds to step S6.

[0029] Next, in the end determination process of step S6, the temperature control unit 40 determines whether the rolling operation of the tire roller 100 has ended. The method for detecting the end of the rolling operation of the tire roller 100 is not limited, and the method may be to detect the stoppage of the drive unit of the tire roller 100, or to detect the operation of a stop switch provided on the tire roller 100. If the rolling operation has not ended, the process proceeds again to step S1, and if it has ended, the process proceeds to the end process, and the tire heating method ends.

[0030] Fig. 3 is a schematic diagram showing an example of the configuration of a pneumatic tire roller 100 according to this embodiment. As shown in Fig. 3, the pneumatic tire roller 100 has a body 50 on which multiple tires 10 are mounted, and each tire 10 is attached to a rim 11. An electric wire heater 31 is also attached to the rim 11. A temperature measurement unit 20 is also arranged on the body 50 so as to face the outer circumferential surface of the tire 10.

[0031] The rim portion 11 is a disk-shaped member provided at the bottom of the vehicle body 50 and supporting a rotation shaft. The tire 10 is mounted on the outer periphery of the rim portion 11, allowing the tire 10 to rotate along with the rotation of the rim portion 11. There are no limitations on the structure or material of the rim portion 11, but it is preferable to use a metal disk in order to effectively conduct heat applied by the electric wire heater 31 to the tire 10, as will be described later.

[0032] The electric heating wire heater 31 is a heating device that is provided on the rim portion 11 and generates heat by passing an electric current through an electrical resistance, and corresponds to the tire heating portion 30 of the electric heater in this invention. The electric heating wire heater 31 may be arranged in contact with the rim portion 11, or may be arranged with a predetermined gap between it and the rim portion 11. The electric heating wire heater 31 may also be fixed to the rim portion 11 so that it rotates together with the rotation of the rim portion 11, or may be held separately from the rim portion 11 so that its position relative to the vehicle body 50 does not change even when the rim portion 11 rotates.

[0033] The temperature measurement unit 20 is attached to a wheel house of the vehicle body 50 and measures the temperature of the outer peripheral surface of the tire 10 to obtain the surface temperature. Here, the position at which the temperature measurement unit 20 measures the surface temperature is preferably forward of the tire roller 100 relative to the center of rotation of the tire 10 and below the center of rotation of the tire 10. In the secondary compaction of the asphalt mixture layer by the tire roller 100, the outer peripheral surface of the tire 10 is gradually brought into contact with the asphalt mixture layer as the tire roller 100 is moved forward. Therefore, heating and stopping of the tire heating unit 30 can be controlled based on the surface temperature of the tire 10 immediately before it comes into contact with the asphalt mixture layer, thereby reducing the impact of cooling of the tire 10 due to the outside air temperature and enabling accurate temperature control.

[0034] In the tire heating method of this embodiment, as an example, the temperature measurement unit 20 measures the surface temperature of the tire 10, and the temperature control unit 40 starts heating with the heating wire heater 31 when the surface temperature is 100°C or lower. The heat generated by the heating wire heater 31 heats the entire tire 10 and the air filled in the internal cavity of the tire 10 through the rim portion 11, and the surface temperature of the tire 10 also rises. Also, as an example, the temperature control unit 40 stops heating with the heating wire heater 31 when the surface temperature of the tire 10 is 180°C or higher.

[0035] As described above, in the tire roller 100 of this embodiment, the temperature measurement unit 20 measures the surface temperature of the tire 10, and the electric heating wire heater 31 heats the tire 10 based on the surface temperature, so that an appropriate heating time can be used to prevent the asphalt mixture from adhering to the tire 10.

[0036] (Second embodiment) Next, a second embodiment of the present invention will be described with reference to FIG. 4. Description of content that overlaps with the first embodiment will be omitted. FIG. 4 is a schematic diagram showing an example configuration of a tire roller 100 according to this embodiment. As shown in FIG. 4, the tire roller 100 has a body 50 on which a plurality of tires 10 are provided, and each tire 10 is mounted on a rim portion 11. A radiant heater 32 is also arranged on the body 50 facing the tire 10. A temperature measurement unit 20 is also arranged on the body 50 facing the outer circumferential surface of the tire 10.

[0037] The radiant heater 32 is a part that radiates infrared rays to the outer peripheral surface of the tire 10 by passing electricity through it, thereby heating the tire 10, and corresponds to the tire heating section 30 of the electric heater in the present invention. The specific configuration of the radiant heater 32 is not limited, and a conventionally known halogen heater or the like can be used. The location where the radiant heater 32 is disposed is not limited, but it is preferable to provide it at the top of the wheelhouse where it can face the outer peripheral surface of the tire 10 and is less susceptible to the effects of weather.

[0038] In the tire heating method of this embodiment, as an example, the temperature measurement unit 20 measures the surface temperature of the tire 10, and the temperature control unit 40 starts heating with the radiant heater 32 when the surface temperature is 100°C or less. The heat generated by the radiant heater 32 heats the outer peripheral surface of the tire 10 through the space in the wheelhouse, and the surface temperature of the tire 10 also rises. Also, as an example, the temperature control unit 40 stops heating with the radiant heater 32 when the surface temperature of the tire 10 is 180°C or more.

[0039] In the tire roller 100 of this embodiment, the surface temperature of the tire 10 is measured by the temperature measurement unit 20, and the tire 10 is heated by the radiant heater 32 based on the surface temperature, so that adhesion of the asphalt mixture to the tire 10 can be prevented by heating for an appropriate time.

[0040] (Third embodiment) Next, a third embodiment of the present invention will be described using FIG. 5. Description of content that overlaps with the first embodiment will be omitted. FIG. 5 is a schematic diagram showing an example configuration of a tire roller 100 according to this embodiment. As shown in FIG. 5, the tire roller 100 has a vehicle body 50 on which multiple tires 10 are mounted, each tire 10 being attached to a rim portion 11, and a liquid heat medium 33 being stored inside the tire 10. Furthermore, although not shown, a tire heating unit 30 is provided in the tire 10. Furthermore, a temperature measurement unit 20 is arranged on the vehicle body 50 facing the outer circumferential surface of the tire 10.

[0041] The heat medium 33 is a liquid stored in the internal cavity of the tire 10. The configuration of the heat medium 33 is not limited, but it is preferable to use an oil with a high specific heat. FIG. 5 shows an example in which the heat medium 33 is stored until the lower half of the internal cavity of the tire 10 is filled, but the amount of the heat medium 33 stored is not limited. Also, FIG. 5 shows an example in which the heat medium 33 is sealed in the internal cavity of the tire 10, but a configuration in which the heat medium 33 is circulated from outside the tire 10 using separately provided piping may also be used. Furthermore, as an example of the tire heating unit 30, an electric wire heater 31 may be provided inside the tire 10 to directly heat the heat medium 33, or a radiant heater 32 may be used to heat the outer peripheral surface of the tire 10 and indirectly heat the heat medium 33.

[0042] In the tire heating method of this embodiment, as an example, the temperature measurement unit 20 measures the surface temperature of the tire 10, and the temperature control unit 40 starts heating with the electric heating wire heater 31 or the radiant heater 32 when the surface temperature is 100°C or lower. When the electric heating wire heater 31 is used, the heat generated by the electric heating wire heater 31 heats the heat medium 33, and the heat medium 33 heats the tire 10 from inside the tire 10. When the radiant heater 32 is used, the heat generated by the radiant heater 32 heats the outer peripheral surface of the tire 10 through the space in the wheelhouse, and the surface temperature of the tire 10 and the temperature of the heat medium 33 also rise. Also, as an example, the temperature control unit 40 stops heating with the electric heating wire heater 31 or the radiant heater 32 when the surface temperature of the tire 10 is 180°C or higher.

[0043] In the tire roller 100 of this embodiment, the temperature measurement unit 20 also measures the surface temperature of the tire 10, and the tire heating unit 30 heats the tire 10 based on the surface temperature, so that an appropriate heating time can be used to prevent the asphalt mixture from adhering to the tire 10. Furthermore, because the liquid heating medium 33 is stored inside the tire 10, the heat applied by the tire heating unit 30 is stored in the heating medium 33, and the heating medium 33 can continuously heat the outer peripheral surface of the tire 10.

[0044] (Fourth embodiment) Next, a fourth embodiment of the present invention will be described with reference to Fig. 6. Description of content that overlaps with the first to third embodiments will be omitted. Fig. 6 is a schematic diagram showing an example configuration of a tire roller 100 according to this embodiment. In this embodiment, in addition to the electric heating wire heater 31, radiant heater 32, and heat medium 33 shown in the first to third embodiments, a heat-insulating cover 34 that covers at least a portion of the tire 10 is added.

[0045] The thermal insulation cover 34 is a portion that covers at least a portion of the tire 10 and suppresses the exchange of outside air around the tire 10. In FIG. 6, the thermal insulation cover 34 is shown as a plate-shaped member that covers the entire side surface of the vehicle body 50, but it may also cover the wheelhouses of the front and rear wheels individually. It may also cover each tire 10 included in the front and rear wheels individually. In addition, in FIG. 6, an example is shown in which the thermal insulation cover 34 covers the upper half of the tire 10, but it may also cover below the center of the tire 10. It is also possible to provide an attachment portion on the thermal insulation cover 34 so that it can be removably attached to the vehicle body 50.

[0046] In the tire roller 100 of this embodiment, the heat-insulating cover 34 covers a portion of the tire 10, thereby suppressing the exchange of outside air around the tire 10 and making it possible to maintain a good surface temperature of the tire 10 heated by the tire heating section 30. In addition, the air heated by the asphalt mixture layer during the secondary rolling compaction operation can be kept inside the heat-insulating cover 34, making it possible to effectively suppress a decrease in the surface temperature of the tire 10.

[0047] (Fifth embodiment) Next, a fifth embodiment of the present invention will be described using Figs. 7 and 8. Description of content that overlaps with the first to third embodiments will be omitted. Fig. 7 is a schematic diagram showing an example configuration of a tire roller 100 according to this embodiment. As shown in Fig. 7, the tire roller 100 has a vehicle body 50 on which multiple tires 10 are mounted, and each tire 10 is attached to a rim portion 11. An electric wire heater 35 is also provided circumferentially inside the outer periphery of the tire 10. A temperature measurement unit 20 is also arranged on the vehicle body 50 facing the outer periphery of the tire 10.

[0048] Fig. 8 is a schematic diagram showing an example of the structure of a tire 10 and an electric heating wire heater 35. As shown in Fig. 8, the tire 10 is attached to a rim portion 11, and a shaft portion 12 is provided on the central axis of the rim portion 11. A slip ring 13 is provided on the shaft portion 12, and the slip ring 13 is electrically connected to a wiring portion 14 that supplies power to the electric heating wire heater 35 and a wiring portion 15 that receives power from a power source (not shown).

[0049] The shaft portion 12 is a rod-shaped shaft member that is provided on the central axis of the rim portion 11 and rotates together with the rotation of the rim portion 11. The length of the shaft portion 12 is not limited, but a slip ring 13 is provided at a position a predetermined distance from the rim portion 11.

[0050] The slip ring 13 is a component that includes a rotating portion that rotates together with the shaft portion 12 and a contact portion whose relative position with the vehicle body is fixed, and ensures electrical connection between the rotating portion and the contact portion by the contact portion coming into contact with the rotating portion. The specific configuration of the slip ring 13 is not limited, and known materials and structures can be used as appropriate. The location where the slip ring 13 is provided is not limited, and it may be located either inside or outside the vehicle relative to the rim portion 11.

[0051] The wiring portion 14 is a wire that electrically connects the slip ring 13 and the electric heating wire heater 35 and supplies current from the slip ring 13 to the electric heating wire heater 35. One end of the wiring portion 14 is connected to the electric heating wire heater 35, and the other end is connected to a rotating portion of the slip ring 13. Therefore, the wiring portion 14 rotates around the shaft portion 12 as the tire 10 and the rim portion 11 rotate. Here, for ease of understanding, the wiring portion 14 is depicted at a position separated from the tire 10 and the rim portion 11, but it may also be routed along the surfaces of the tire 10 and the rim portion 11.

[0052] The wiring portion 15 is a wire that electrically connects the power supply and the slip ring 13 and supplies current from the power supply to the slip ring 13. One end of the wiring portion 15 is connected to the power supply, and the other end is connected to the contact portion of the slip ring 13. The wiring portion 15 is not affected by the rotation of the tire 10 and the rim portion 11, and its position relative to the vehicle body does not change. Here, for ease of understanding, the wiring portion 15 is depicted at a position separated from the shaft portion 12, but it may also be routed along the shaft portion 12.

[0053] The electric wire heater 35 is a heating device that is provided circumferentially inside the outer periphery of the tire 10 and generates heat by passing an electric current through an electric resistance, and corresponds to the tire heating unit 30 of the electric heater in the present invention. The electric wire heater 35 may be wound in a coil shape along the circumferential surface of the tire, or multiple annular resistors may be connected in parallel. Alternatively, a mesh-shaped or sheet-shaped electric resistor may be arranged along the circumferential surface of the tire. While FIG. 8 shows an example in which the electric wire heater 35 is embedded inside the rubber of the tire 10, it may also be attached along the inner circumferential surface of the tire 10. Alternatively, a tube may be arranged inside the tire 10, and the electric wire heater 35 may be sandwiched between the inner circumferential surface of the tire 10 and the outer circumferential surface of the tube.

[0054] In the tire heating method of this embodiment, as an example, the temperature measurement unit 20 measures the surface temperature of the tire 10, and the temperature control unit 40 starts heating with the electric heating wire heater 35 when the surface temperature is 100°C or lower. The heat generated by the electric heating wire heater 35 directly heats the outer peripheral surface of the tire 10, causing the surface temperature of the tire 10 to rise. Also, as an example, the temperature control unit 40 stops heating with the electric heating wire heater 35 when the surface temperature of the tire 10 is 180°C or higher.

[0055] As described above, in the tire roller 100 of this embodiment, the temperature measurement unit 20 measures the surface temperature of the tire 10, and the electric wire heater 35 heats the tire 10 based on the surface temperature, making it possible to prevent adhesion of the asphalt mixture to the tire 10 by an appropriate heating time. Furthermore, because the electric wire heater 35 is disposed inside the tire 10 along the circumferential direction of the tire 10, it is possible to uniformly heat the entire outer periphery of the tire 10, and to suppress adhesion of the asphalt mixture to the entire circumferential surface of the tire 10 from the start of secondary rolling compaction.

[0056] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. [Explanation of symbols]

[0057] 100...Tire roller 10...Tires 11...Rim section 12...Shaft section 13...Slip ring 14,15...Wiring section 20…Temperature measurement section 30...Tire heating section 31, 35...Electric wire heater 32...Radiant heater 33...heat medium 34…Insulated cover 40...Temperature control unit 50...Body

Claims

1. A tire roller that compacts an asphalt mixture with a tire, a temperature measuring unit for measuring the surface temperature of the tire; a tire heating unit that heats the tire based on the surface temperature measured by the temperature measuring unit.

2. The pneumatic tire roller according to claim 1, The tire roller is characterized in that the tire heating portion is an electric heater.

3. The pneumatic tire roller according to claim 2, The tire roller is characterized in that the tire heating portion is disposed opposite to the surface of the tire.

4. The pneumatic tire roller according to claim 2, The tire roller is characterized in that the tire heating portion is disposed on a rim portion of the tire to heat the rim portion.

5. The pneumatic tire roller according to claim 2, A liquid heat medium is stored inside the tire, The tire roller is characterized in that the tire heating section heats the liquid heat medium.

6. The pneumatic tire roller according to claim 2, The tire roller is characterized in that the tire heating portion is arranged along the circumferential direction on the inside of the outer periphery of the tire.

7. A pneumatic tire roller according to any one of claims 1 to 6, The tire heating section starts heating when the surface temperature reaches 70°C or lower, and stops heating when the surface temperature reaches 180°C or higher.

8. A tire heating method for a tire roller that compacts an asphalt mixture with a tire, comprising: a temperature measuring step of measuring a surface temperature of the tire; a tire heating step of heating the tire based on the surface temperature measured in the temperature measuring step.

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