WO2006061918A1

WO2006061918A1 - Plate compactor

Info

Publication number: WO2006061918A1
Application number: PCT/JP2005/007088
Authority: WO
Inventors: Kazuo Akita
Original assignee: Kazuo Akita
Priority date: 2004-12-08
Filing date: 2005-04-12
Publication date: 2006-06-15
Also published as: JPWO2006061918A1; JP4000181B2

Abstract

A plate compactor (1) has a first power transmission means for transmitting power from an engine (2) to an electric generator (3), a second power transmission means for transmitting and shutting off the power from the engine (2) to a vibrator (4), and a temperature sensor (28) for detecting the temperature of a vibration plate (6) vibrated by the vibrator (4). The plate compactor (1) has a control board (7) for controlling operation of a heater (5) by the temperature sensor (28) so that the temperature of the vibration plate (6) is within a predetermined temperature range in which an asphalt mixture does not adhere to the vibration plate (6). The control board (7) also controls operation of the second power transmission means so that the transmission of power from the engine (2) to the vibrator (4) is shut off until the temperature of the vibration plate (6) after the start of the engine (2) reaches a predetermined temperature range and that the power is transmitted from the engine (2) to the vibrator (4) after the temperature of the vibration plate (6) reaches the predetermined temperature range.

Description

Specification

Technical Field of Plate Compactor

The present invention relates to a plate compactor used for asphalt pavement and the like.

Background art

[0002] Generally, a plate compactor includes an engine disposed in an upper part, an exciter connected to the engine via a belt suspension mechanism, and vibrations caused by the exciter to match a false fault on a roadbed. And a diaphragm for compacting the material. In this type of plate compactor, asphalt mixture often adheres to the roadbed side surface of the vibration plate, which may cause damage to the compacted surface of the asphalt mixture. Therefore, in the conventional plate compactor, water is sprayed on the surface of the asphalt mixture in front of the plate compactor.

[0003] However, this method requires extra manpower to spray water on the surface of the asphalt mixture, and it is not easy to secure the amount of water necessary for spraying. Furthermore, in this method, the temperature of the asphalt mixture is drastically lowered by spraying water on the surface of the asphalt mixture, so when the asphalt mixture in such a state is compacted with a plate compactor, the asphalt mixture There is a problem in that the compacted surface of the composite material is cracked or uneven, and the finished state of the compacted surface of the asphalt composite material is deteriorated.

[0004] In order to cope with these problems, for example, in the plate connectors disclosed in Patent Documents 1 and 2, a heater is attached to the diaphragm, and the abutting portion that abuts on the asphalt composite material of the diaphragm is formed in this manner. It is heated to a temperature at which asphalt mixture does not adhere to the contact part (for example, 70 ° C to 100 ° C).

[0005] Among the above plate compactors, the plate compactor disclosed in Patent Document 1 includes a generator driven by an engine. In this plate compactor, the engine is started, the generator is driven, and then the heater is switched on. After the diaphragm reaches a certain temperature, the engine speed is increased and asphalt pavement is started.

[0006] However, in this method, since the engine is operating at a low speed until the diaphragm is heated to a certain temperature by the heater, the diaphragm vibrates. As a result, vibration Although the plate has not reached a certain temperature, the plate compactor can move forward due to the vibration of the diaphragm. As a result, in this plate compactor, asphalt mixture can adhere to the roadbed side surface of the diaphragm as described above. This can cause damage to the compacted surface of the asphalt mixture.

In this case, in order to avoid this, the rotational speed of the engine may be extremely smaller than the rotational speed of the engine when asphalt pavement. In this case, however, the output of the generator is reduced, so there is a new problem that even if the diaphragm is heated by the heater, the power cannot be heated to an appropriate temperature or the heating time is prolonged. As a result, it is not practical to reduce the engine speed.

[0008] Further, since this type of plate compactor vibrates violently, the connection portion of the wiring that electrically connects the generator and the heater is often disconnected. Therefore, it is often impossible to operate the plate compactor stably!

Patent Document 1: JP-A-10-317314

Patent Document 2: JP 2001-020213 A

Disclosure of the invention

Problems to be solved by the invention

[0009] The present invention has been made in view of the circumstances as described above, and is compact, and the diaphragm is heated to a predetermined temperature range without asphalt mixture adhering to the diaphragm in a relatively short time. It is an object of the present invention to provide a plate compactor that can stably maintain the state.

Means for solving the problem

[0010] The present invention includes an engine, a generator that is drivably connected to the engine, a vibrator that is driven by the engine, and a heating element that is electrically connected to the generator. A plate compactor including a diaphragm heated by the heating element and vibrated by the vibration exciter to tighten and solidify the asphalt mixture; and first power transmission means for transmitting the engine power to the generator as well. A second power transmission means for transmitting and shutting off power to the engine power exciter; a temperature detecting means for detecting the temperature of the diaphragm; and a vibration detecting means for detecting the temperature of the diaphragm detected by the temperature detecting means. Said vibration based on temperature The operation of the heating element is controlled so that the temperature of the plate is within a predetermined temperature range in which the asphalt mixture does not adhere to the vibration plate, and the engine is started until the temperature of the vibration plate reaches a predetermined temperature range after starting the engine. Control to control the operation of the second power transmission means so that the power from the engine is cut off and the power from the engine to the vibrator is transmitted after the temperature of the diaphragm reaches the predetermined temperature range. Means.

[0011] In general, when the engine is started, the generator is driven by the first power transmission means. Then, the heating element generates heat by the electric power supplied from the generator. Due to this heat generation, the heating element heats the diaphragm. When the diaphragm reaches a predetermined temperature range, the vibrator is operated by the second power transmission means to vibrate the diaphragm. This causes the diaphragm to compact the asphalt mixture on the road floor.

[0012] By doing as described above, it is possible to use all of the engine power for driving the generator, that is, for heating the diaphragm by the heating element when the engine is started. As a result, the diaphragm can be heated to a predetermined temperature range in which asphalt mixture does not adhere to the diaphragm in a relatively short time, and the state can be stably maintained.

In addition, since the diaphragm does not vibrate until the temperature of the engine starting force diaphragm reaches a predetermined temperature range, the plate compactor does not move due to vibration. Therefore, in the state where the temperature of the diaphragm is lower than the predetermined temperature range, the diaphragm does not compact the asphalt mixture on the road floor. As a result, asphalt mixture does not adhere to the diaphragm when the engine is started. This makes it possible to prevent the quality of the compacted surface of the asphalt mixture from deteriorating.

More specifically, the first power transmission means includes a first pulley attached to the drive shaft of the engine and a second pulley attached to the first driven shaft of the generator. A pulley, and a first belt wound around the first pulley and the second pulley, and the second power transmission means is connected to the first pulley on the drive shaft of the engine. A third pulley mounted at a predetermined distance in the axial direction, a fourth pulley mounted on a second driven shaft of the vibrator, the third pulley and the fourth pulley It is preferable to provide a second belt wound around the pulley and to disengage a clutch that engages and disengages the third pulley with respect to the drive shaft of the engine. Preferably this clutch is an electromagnetic clutch Yes. Thereby, it becomes possible to make the whole plate compactor compact.

[0015] Preferably, the temperature detecting means is a thermostat. Of course, the temperature detecting means may be a thermocouple or a resistance temperature element. As a result, the temperature of the diaphragm can be accurately controlled. It is also possible to make the whole plate compactor compact.

[0016] Another plate compactor according to the present invention includes an engine, a generator drivably connected to the engine, a vibrator driven by the engine, and heat generation electrically connected to the generator. A plate compactor including a vibration plate that is attached to a body and heated by the heating element and vibrated by the vibrator to compact the asphalt mixture, wherein the heating element is electrically connected to the wiring from the generator A first fixing member having a penetrating portion connected to the terminal, and a penetrating portion of the first fixing member. A second fixing member that is inserted into a portion and electrically connected to the terminal when the terminal is connected to the first fixing member; Generator side of through-hole of fixed member A position restricting member that restricts the position of the wiring by attaching to the terminal, and an elasticity that surrounds these members with the first fixing member, the second fixing member, and the position restricting member attached to the terminal A member.

More specifically, the heating element is formed in a rod shape, has a male screw on the outer peripheral surface, and is electrically connected to the generator that protrudes in the axial direction from one end of the heating element. A female screw threadedly engaged with the terminal is formed on the inner peripheral surface of the through portion of the first fixing member, and the second fixing member is a wiring from the generator The terminal is electrically connected to the end of the terminal, and the terminal is screwed into the penetrating part of the first fixing member so as to be inserted and fixed to a predetermined position of the penetrating part. It is preferable that The position restricting member preferably has a resilient material (for example, urethane) force, and is formed in a truncated cone shape and has a hole through which the wiring passes. The elastic member is preferably made of an insulating material (for example, vinyl chloride) and formed in a tube shape.

[0018] In the above configuration, the connection portion between the terminal of the heating element and the wiring from the generator has elasticity. Therefore, even if the diaphragm vibrates, the vibration is absorbed by the elastic material. As a result, it is possible to prevent disconnection at the connecting portion. As a result, the temperature of the diaphragm can be stably maintained within a predetermined temperature range, and the plate compactor can be stably operated for a long time.

The invention's effect

[0019] According to the plate compactor according to the present invention, the entire apparatus can be made compact, and the diaphragm can be heated to a predetermined temperature range without any asphalt mixture adhering to the diaphragm in a relatively short time. It can be maintained stably.

Brief Description of Drawings

[0020] The present invention is not limited by the forces illustrated by way of example in the accompanying drawings. In these drawings, the same reference numerals are assigned to equivalent members.

FIG. 1 is an external view showing an example of a configuration of a plate compactor according to an embodiment of the present invention, in which (a) is a partially broken front view and (b) is a side view.

FIG. 2 is a sectional view showing an example of the configuration of a third pulley of the plate compactor according to the embodiment of the present invention.

FIG. 3 is a conceptual diagram showing an example of a structure of a connection portion between a heater terminal of a plate compactor according to an embodiment of the present invention and a wiring of a generator and wiring, and (a) to (g) The manufacturing process is shown.

FIG. 4 is a block diagram showing an example of the configuration of the control panel of the plate compactor according to the embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an external view showing an example of the configuration of a plate compactor according to an embodiment of the present invention, (a) is a partially broken front view, and (b) is a side view. For the sake of explanation, the traveling direction of the plate compactor is referred to as the front, the opposite side is referred to as the rear, the left side relative to the traveling direction is referred to as the left, and the right side is referred to as the right.

[0023] As shown in FIG. 1 (a), the plate compactor 1 can be driven by the engine 2 and the engine 2. A generator 3 connected to the generator, a vibrator 4 driven by the engine 2, a heater 5 electrically connected to the generator 3, and the heater 5 heated and excited by the heater 5. A diaphragm 6 that vibrates and compacts the asphalt mixture by means of the vessel 4, a control panel 7 that controls these operations, and a base plate 8 for mounting these components.

More specifically, the base plate 8 is formed in a long plate shape, and is disposed above the diaphragm 6 so that the longitudinal direction thereof coincides with the front-rear direction of the plate compactor 1. Above the rear part of the base plate 8, an engine stand 9 for installing the engine 2, the generator 3 and the control panel 7 is arranged. The engine base 9 is formed in a U-shaped cross section, and is arranged so that both sides thereof extend in the front-rear direction. The engine base 9 is formed so that the bottom and both sides thereof are flat, and the opening to the inner surface of the bottom is directed to the base plate 8 side.

A support plate 10 is provided on the upper surface of the rear portion of the base plate 8 to support the engine base 9 from the inner surface side of the left and right side portions thereof. Four support plates 10 are provided, two at a predetermined distance in the front-rear direction, and two front support plates 10 and two rear support plates 10 each have a predetermined distance in the left-right direction. Are spaced apart. Note that the number of support plates 10 is four here, but is not limited to this. For example, six support plates 10 may be provided. A portion of each support plate 10 that faces the inner surfaces of the left and right side portions of the engine base 9 is a vibration isolation member (for example, an anti-vibration member) that blocks vibration transmitted from the vibrator 4 to the engine base 9 through the base plate 8. (Vibrating rubber) 11 is attached. The engine stand 9 is connected to each support plate 10 via a corresponding vibration isolation member 11. As a result, transmission of vibration to the engine base 9 by the vibrator 4 can be suppressed. This makes it possible to prevent damage due to vibration of the engine 2 and the generator 3.

[0026] A handle 12 for an operator to hold is provided at the rear of the engine base 9 so as to extend rearward and obliquely upward. The handle 12 is formed, for example, by bending a pipe material into a U shape, and its open end is attached to the rear part of the engine base 9.

[0027] On the upper surface of the rear portion of the engine base 9, the engine 2 is disposed adjacent to the front of the handle 12. This engine 2 is, for example, a known 2-cycle or 4-cycle gas Sorin engine power is also achieved. A drive shaft 13 extending outward is provided near the center of the left side surface of the engine 2.

As shown in FIG. 1 (b), the drive shaft 13 has a first pulley 14 that transmits power to the generator 3 and a third pulley that transmits and blocks power to the vibrator 4. A pulley 15 is attached at a predetermined distance in the axial direction. The first pulley 14 is disposed outside the third pulley 15 in the axial direction of the drive shaft 13. Details will be described later.

As shown in FIG. 1 (a), a generator 3 is disposed adjacent to the front of the engine 2 on the left side of the upper surface of the front portion of the engine base 9. This generator 3 also has a known AC generator power, for example. Of course, a DC generator or the like may be used as the generator 3. Near the center of the left side surface of the generator 3, a first driven shaft 16 extending outward is provided. The first driven shaft 16 is arranged so that both axes are substantially parallel to the drive shaft 13. A second pulley 17 is attached to the first driven shaft 16. A first belt 18 is wound around the second pulley 17 and the first pulley 14. The first belt 18 is made of, for example, a known V belt. With the above configuration, power can be transmitted from the engine 2 to the generator 3.

[0030] The first and second pulleys 14, 17 and the first belt 18 constitute first power transmission means. The first power transmission means is not limited to the above configuration. For example, a timing belt or the like may be used as the first belt 18 instead of the V belt. A sprocket may be used in place of the first and second pulleys 14 and 17, and a chain may be used in place of the first belt 18. This also allows power to be transmitted from the engine 2 to the generator 3.

[0031] On the right side of the upper surface of the front portion of the engine base 9, a mounting base 7a on which the control panel 7 is installed is attached so as to extend forward, along with the generator 3. The control panel 7 is mounted on the mounting base 7a via a vibration isolating member (not shown) that has a force such as a high resilience urethane or a high resilience rubber. In addition, it is preferable that the base in the control panel 7 is coated with silicon, the wiring in the control panel 7 is a robot line, and the wiring connected to the control panel 7 is a robot line. As a result, vibration transmitted from the engine 2 or generator 3 to the control panel 7 is suppressed, and disconnection, loosening of screws, dropping off, etc. in the control panel 7 are caused. Can be prevented. As a result, the operation of the plate compactor 1 can be controlled stably.

The vibrator 4 is disposed on the upper surface of the front portion of the base plate 8. Near the center of the left side surface of the vibration exciter 4 is provided a second driven shaft 19 extending outward. The second driven shaft 19 is arranged so that both axes are substantially parallel to the driving shaft 13. A fourth pulley 20 is attached to the second driven shaft 19. A second belt 21 is wound around the fourth pulley 20 and the third pulley 15. Further, the third pulley 15 is configured to be disengaged from the drive shaft 13. Details will be described later. The second belt 21 is, for example, a known V-belt, like the first belt 18. With the above configuration, power can be transmitted from the engine 2 to the vibration exciter 4 or cut off.

[0033] Note that the third and fourth pulleys 15, 20 and the second belt 21 constitute second power transmission means. The second power transmission means is not limited to the above configuration. For example, a timing belt or the like may be used as the second belt 21 instead of the V belt. A sprocket may be used in place of the third and fourth pulleys 15 and 20, and a chain may be used in place of the second belt 21. This also makes it possible to transmit power from the engine 2 to the vibration exciter 4 or to shut it off.

[0034] Although not shown, the second driven shaft 19 includes an eccentric portion that is bent in a U-shape at an intermediate portion in the axial direction. This eccentric part is located in the casing of the vibrator 4. When the second driven shaft 19 is rotated by the engine 2, the eccentric portion rotates to generate vibration. This vibration is transmitted through the base plate 8 to the diaphragm 6 connected thereto. Thereby, the diaphragm 6 vibrates so as to rotate up and down and up and down.

Further, the structure of the third pulley 15 will be described in detail with reference to FIG. As shown in FIG. 2, the third pulley 15 is engaged with and detached from the pulley body 23 by a pulley body 23 mounted on the drive shaft 13 via a bearing 22, an annular electromagnet 24, and the electromagnet 24. And an electromagnetic clutch 26 having a clutch portion 25.

[0036] The pulley main body 23 has two V-shapes in which the second belt 21 is housed on the outer periphery thereof. The groove 23a is provided around. The grooves 23a are arranged in parallel at a predetermined distance in the plate thickness direction of the pulley body 23 (substantially the same direction as the axial direction of the drive shaft 13). In addition, an annular concave groove 23b for accommodating the annular electromagnet 24 in a non-contact manner is formed in a portion of the pulley body 23 on the engine 2 side. The electromagnet 24 is accommodated in the groove 23b in a non-contact manner.

[0037] The clutch unit 25 is disposed between the pulley body 23 of the drive shaft 13 and the first pulley 14. The clutch portion 25 is engaged with the first pulley 14 side surface 23c of the pulley body 23 by moving the predetermined position force to the pulley body 23 side by the magnetic force of the electromagnet 24 when the electromagnet 24 is turned on. The engagement member 25a and the attachment member 25a for pulling the engagement member 25a away from the surface 23c on the first pulley 14 side of the pulley body 23 when the electromagnet 24 is turned off to return to the predetermined position. A biasing member 25b and a support member 25c for supporting the engagement member 25a via the biasing member 25b are provided.

[0038] The engagement member 25a, the urging member 25b, and the support member 25c are arranged in this order from the pulley body 23 side.

[0039] The engaging member 25a has, for example, two large and small annular plate member forces, and is attached to the pulley body 23 side of the urging member 25b. Each engaging member 25 a is disposed concentrically with the drive shaft 13.

[0040] The support member 25c is also a triangular plate member, for example, is disposed concentrically with the drive shaft 13 and is erected on the outer periphery of the drive shaft 13. The support member 25c is formed so that the outer diameter of the virtual circumscribed circle passing through each apex is substantially the same as the outer diameter of the small-diameter engagement member 25a among the engagement members 25a. Each top force of the support member 25c is connected to the small-diameter engagement member 25a.

[0041] The urging member 25b has a plurality of plate panel forces, for example, and is attached to the surface of the support member 25c on the pulley body 23 side so as to be urged and deenergized in the axial direction of the drive shaft 13. . Although not shown, each of the urging members 25b is arranged so as to extend from the support member 25c to the large and small engaging members 25a, and is connected to these members 25a and 25c. The connecting portions between the urging member 25b and the members 25a and 25c are equally arranged in the circumferential direction of the members 25a and 25c. Of course, these connecting parts are connected to the tops of the support members 25c described above with small diameters. It is arranged so that it does not interfere with the position where it is connected to the member 25a.

[0042] The electromagnet 24 is made of, for example, a known air-core coil. The magnetic force of the electromagnet 24 overcomes the urging force of the urging member 25b to engage the engaging member 25a with the surface 23c on the first pulley 14 side of the pulley body 23, thereby causing the pulley body 23 to move to the drive shaft 13 It is set so that it can be rotated together.

As described above, the third pulley 15 can be engaged and disengaged with respect to the drive shaft 13. As a result, as described above, power can be transmitted from the engine 2 to the vibrator 4 or shut off.

As shown in FIG. 1 (a), a diaphragm 6 is attached to the lower part of the base plate 8 via a support member (not shown). The front end portion of the diaphragm 6 warps obliquely upward and forward, and the rear end portion of the diaphragm 6 warps obliquely upward and backward. The height positions of the front end and the rear end of the diaphragm 6 are substantially coincident with the height positions of the front end and the rear end of the upper surface of the base plate 8, respectively. The diaphragm 6 vibrates when the vibration of the vibrator 4 is transmitted through the base plate 8 and the support member.

As shown in FIGS. 1 (a) and 1 (b), a heat transfer member 26 for efficiently transferring the heat generated by the heater 5 to the diaphragm 6 on the inner surface of the bottom of the diaphragm 6 described above. Are attached closely. The heat transfer member 26 is formed in a long plate shape, and extends along the front-rear direction of the bottom inner surface of the diaphragm 6 and is spaced a predetermined distance from each other in the left-right direction of the bottom inner surface of the diaphragm 6. Three rows are arranged. Each heat transfer member 26 is made of a material having a relatively large thermal conductivity, such as an aluminum cover. Of course, it is not limited to these configurations. For example, a coating agent such as silicon (for example, heat release silicon having a heat-resistant temperature of 300 ° C.) may be interposed between the heat transfer member 26 and the diaphragm 6 so as to be in close contact with each other. As a result, the gap between the heat transfer member 26 and the diaphragm 6 is reduced, so that heat conduction from the heat transfer member 26 to the diaphragm 6 can be improved.

[0046] Although not shown in the drawings, a concave groove for accommodating the heater 5 is formed in a U shape when viewed from above on the upper surface side of each heat transfer member 26. Each groove extends over the entire top surface of each heat transfer member 26. Of course, the shape of the groove is not limited to this, and is determined so that each heat transfer member 26 is entirely within a predetermined temperature range. Each heater 5 are respectively accommodated and fixed in these grooves. Here, the heater 5 and the heat transfer member 26 are provided separately, but an integrated heater integrally formed by incorporating the heater 5 into the heat transfer member 26 such as a swivel heater may be used. Good. This makes it possible to protect the heater and shorten the assembly time of the heat transfer member and the heater.

A heat insulating member 27 is attached to the top of each heat transfer member 26 and each heater 5 so as to cover the entire top surface of each heat transfer member 26 and the entire top of each heater 5. This heat retaining member 27 is located below the base plate 8. As such a heat retaining member 27, for example, glass wool or heat resistant polyester felt is used. Thereby, the heat generated by the heater 5 can be efficiently transmitted to the diaphragm 6. At the same time, since heat conduction from the heater 5 to parts such as the base plate 8 positioned above the heater 5 can be cut off, it is possible to suppress deterioration of durability due to heat of these parts.

[0048] Each heater 5 accommodated in each heat transfer member 26 is made of, for example, a known rod-shaped electric heater, and is formed so as to conform to the groove shape of each heat transfer member 26 described above. The input / output terminals of the heaters 5a and 5b arranged on the left and right heat transfer members 26 are arranged at a predetermined distance on the left and right sides of the base plate 8, and the heat transfer corresponding to the respective heaters 5a and 5b. The rear force of the member 26 also extends upward so that it rises. The intermediate heater 5c disposed on the heat transfer member 26 located between the left and right heat transfer members 26 extends upward so that the rear force of each heat transfer member 26 rises. However, the input / output terminal of the heater 5c extends upward through the base plate 8. Although not shown, the input / output terminals of each heater 5 are electrically connected to the generator 3 through the control panel 7. The heating value of each heater 5 is set to 800 W, for example. Here, the heating value of each heater 5 is set to 800 W, but the present invention is not limited to this. Specifically, the amount of heat generated by each heater 5 is appropriately set according to the area of the diaphragm 6 of the plate compactor 1 and the like.

A temperature sensor 28 for controlling the operation (for example, ON-OFF operation) of each of the heaters 5 is provided on the base plate 8. This temperature sensor 28 is disposed between the input and output terminals of the intermediate heater 5c, and the surface temperature of the intermediate heater 5c Is measured as a representative temperature. The set temperature of the temperature sensor 28 is set in advance so that the temperature of the diaphragm 6 is within a predetermined temperature range (for example, a range of 70 ° C. to 100 ° C.) without the asphalt mixture adhering to the diaphragm 6. ing. For example, the set temperature is set to 190 ° C. As a result, the temperature of the diaphragm 6 is controlled within the predetermined temperature range. As a result, it is possible to prevent the asphalt mixture from adhering to the diaphragm 6.

As the temperature sensor 28, a thermostat can be used. However, it is not limited to this. In addition, as the temperature sensor 28, for example, a thermocouple or a resistance thermometer can be used. In this case, the control panel 7 receives temperature information from the temperature sensor, and the control panel 7 controls the operation of the heater 5 based on the temperature information.

Next, an example of the configuration and manufacturing process of the connection portion between the terminal of each heater 5 and the wiring from the generator 3 will be described with reference to FIG.

[0052] As shown in FIG. 3 (a), first, a long and narrow shaft 29 is prepared in the axial direction. Next, as shown in FIG. 3 (b), the end 30a of the wire 30 from the generator 3 is passed through the through hole of the nut 29, and the crimp terminal 31 is attached to the end 30a of the wire 30. Cut off the annular tip 31a. Subsequently, as shown in FIG. 3 (c), the connecting portion between the end 30a of the wiring 30 and the crimp terminal 31 is further brazed (for example, soldering or silver brazing) to increase the joint strength between the two. Improve. Then, as shown in FIG. 3 (d), the wiring 30 is pulled to the opposite side of the end 30a, and the crimp terminal 31 is arranged at a predetermined position in the through hole of the nut 29.

[0053] Incidentally, as shown in FIG. 3 (e), a terminal 5d having an external thread formed on the outer peripheral portion is provided at the end of the heater 5. A set nut 32 for setting a position where the nut 29 is attached to the terminal 5d is screwed to the terminal 5d. As shown in FIG. 3 (d), after the crimp terminal 31 is arranged at a predetermined position in the through hole of the nut 29, the tip end of the terminal 5 d is screwed into the nut 29. Then, the above-mentioned crimp terminal 31 is pressed and pressed to a predetermined position in the through hole of the nut 29. After that, the set nut 32 is brought into contact with the end of the nut 29 on the heater 5 side. Thereby, the position of the nut 29 with respect to the terminal 5d is fixed.

Subsequently, as shown in FIG. 3 (f), a position regulating member 33 for regulating the position of the wiring 30 in the opening at the opening on the opposite side of the through hole of the nut 29 from the heater 5 side. Install. The position restricting member 33 is, for example, a truncated cone having a hole through which the wiring 30 passes in the center. Three elastic urethane caps are arranged in series. These position restricting members 33 are connected to each other so as to insert the other tapered outer peripheral portion into one wide hole portion of the adjacent position restricting members 33. Of these position regulating members 33, the tapered outer peripheral portion of the position regulating member 33 closest to the nut 29 is inserted into the through hole of the nut 29. Thereby, the position of the wiring 30 is fixed at the opening of the nut 29 described above. Of course, it is not limited to the configuration described above.

Subsequently, as shown in FIG. 3 (g), with the nut 29 attached to the terminal 5d and the position restricting member 33 attached to the nut 29, the surrounding member 34 for surrounding the periphery of these members is attached. . The surrounding member 34 is made of a material having elasticity and insulation (for example, vinyl chloride) and is formed in a tube shape. In a state where the surrounding member 34 is attached to the members 5d, 29, and 33, the filling member 35 is filled into a gap formed between the surrounding member 34 and the terminal 5d, the nut 29, and the position regulating member 33. As the filling member 35, for example, a filling member that also becomes a silicon condenser can be used. Here, the surrounding member 34 and the filling member 35 described above constitute an elastic member. Instead of the surrounding member 34 and the filling member 35, a heat-shrinkable tube may be used. In this case, with the nut 29 attached to the terminal 5d and the position regulating member 33 attached to the nut 29, the periphery of these members is covered with a heat-shrinkable tube, and hot air is blown from the outside of the tube to Close the tube around the member. Thereby, since the filling member 35 can be omitted, the above manufacturing process is simplified.

[0056] By configuring the connection portion 36 between the terminal of each heater 5 and the wiring from the generator 3 as described above, the connection portion 36 can absorb vibration caused by the diaphragm 6. As a result, it is possible to avoid disconnection at the connecting portion 36. As a result, the temperature of the diaphragm 6 can be stably maintained within a predetermined temperature range, and the plate compactor 1 can be stably operated for a long time.

Next, the control panel 7 will be described with reference to FIG. As shown in FIG. 4, the control panel 7 includes, for example, a heater output unit 37, a heater temperature control unit 38, a switching power supply unit 39, a generated voltage control unit 40, a clutch switch 41, and a rectifier 42.

[0058] The heater output unit 37 has an input side electrically connected to the generator 3 and an output side connected to a heater. It is electrically connected to ter 5. The heater output unit 37 is configured to supply and cut off electric power (for example, AC 200 V, three phases) input from the generator 3 to the heater 5. Further, although not shown, an ONZOFF switch may be provided between the heater output unit 37 and the heater 5. As a result, the user can freely select the operation timing of the heater 5.

[0059] The heater temperature control unit 38 is communicably connected to the temperature sensor 28 and is optically coupled to the heater output unit 37 through, for example, a photo power bra. The heater temperature control unit 38 is configured to control the operation of the heater output unit 37 according to the ONZOFF operation of the temperature sensor 28! RU

The switching power supply unit 39 is electrically connected to the generator 3. The switching power supply unit 39 is electrically connected to the heater temperature control unit 38, the generated voltage control unit 40, and the electromagnet 24 via the clutch switch 41, respectively. This switching power supply unit 39 transforms the electric power input from the generator 3 into a predetermined electric power (for example, DC12V), and this electric power is supplied to the heater temperature control unit 38, the generated voltage control unit 40, and the clutch. The electric power is supplied to the electromagnet 24 through the switch 41 as an operating power.

[0061] The generated voltage control unit 40 is optically coupled to a power line from the generator 3 to the heater output unit 37 and the switching power supply unit 39 through, for example, a photo power plug. The generated voltage control unit 40 is connected to the generator 3 so as to be communicable. The generator voltage control unit 40 is configured to acquire the output voltage of the generator 3 through the photo power bra, and to control the output voltage of the generator 3 based on the output voltage!

[0062] The clutch switch 41 is, for example, a known manual ONZOFF switch, and is provided between the switching power supply unit 39 and the electromagnet 24 as described above. When the clutch switch 41 is turned on, the electromagnet 24 is energized, and the engaging member 25a of the clutch portion 25 is attracted to the electromagnet 24 by the magnetic force of the electromagnet 24, and the first pulley of the pulley body 23 is pulled. It is engaged with the surface 23c on the 14 side. As a result, the driving force of the engine 2 is transmitted to the vibrator 4 through the third pulley 15, the second belt 21 and the fourth pulley 20. Conversely, when the clutch switch 42 is turned off, the electromagnet 24 is deenergized and demagnetized. That As a result, the engaging member 25a of the clutch portion 25 is pulled away from the surface 23c on the first pulley 14 side of the pulley body 23 by the urging force of the urging member 25b and returns to the original position. As a result, transmission of the power of the engine 2 to the third pulley 15 is interrupted.

The rectifier 42 is electrically connected to a power generation unit 43 attached to the engine 2 and is also electrically connected to a field coil (not shown) of the generator 3. The rectifier 42 transforms the input voltage (for example, AC12V) from the power generation unit 43 of the engine 2 into an initial excitation voltage (for example, DC12V) to the field coil of the generator 3. A circuit from the power generation unit 43 of the engine 2 to the generator 3 through the rectifier 42 is used to supply a voltage for initial excitation of the generator 3. Of course, the present invention is not limited to this. For example, a battery may be provided in the control panel 7, and this battery power may also supply the initial excitation voltage of the generator 3. As a result, the power generation unit 43 and the rectifier 42 of the engine 2 can be omitted. Needless to say, when the generator 3 is of a type that does not need to supply the initial excitation voltage, the rectifier 42 is not necessary.

[0064] Finally, the operation of the plate compactor 1 according to the present embodiment will be described.

[0065] First, the engine 2 is manually started. The power generation unit 43 of the engine 2 generates power, and the initial excitation voltage is supplied from the power generation unit 43 to the field coil of the generator 3 through the rectifier 42 of the control panel 7. Then, the generator 3 starts generating electricity.

[0066] Thereafter, the ONZOFF switch between the heater output unit 37 and the heater 5 described above is manually turned ON. Then, current flows through the heater 5 and the heater 5 generates heat. Heat generated by the heater 5 is transmitted to the diaphragm 6 through the heat transfer member 26. Thereby, the diaphragm 6 is heated.

[0067] When the temperature of the temperature sensor 28 exceeds 190 ° C, power supply to the heater temperature control unit 38 force S heater 5 is cut off. When the temperature of the temperature sensor 28 falls below 190 ° C, the heater temperature control unit 38 supplies power to the heater 5. By repeating these operations, the temperature of the diaphragm 6 can be controlled within a predetermined temperature range (70 ° C. to 100 ° C.) in which the asphalt mixture does not adhere to the diaphragm 6.

[0068] After the temperature of the diaphragm 6 falls within the predetermined temperature range, the clutch switch 41 is manually turned on. Then, the power of the engine 2 is transmitted to the vibrator 4, and the vibrator 4 vibrates the diaphragm 6. Move. Thereby, the diaphragm 6 vibrates so as to kick the asphalt composite material on the road floor by rotating in the front-rear and up-down directions. Due to this vibration, the plate compactor 1 moves forward, and at the same time, the diaphragm 6 of the plate compactor 1 compacts the asphalt mixture on the road floor. Asphalt pavement is performed in this way.

[0069] When finishing the asphalt pavement, manually turn off the clutch switch 41 and turn off the ONZOFF switch. Then stop the operation of engine 2 manually.

[0070] Here, the engine 2, the clutch switch 41, and the above ONZOFF switch are manually operated, but these parts or devices are operated with predetermined start and stop signals (for example, driving of the engine 2). It may be configured to start and stop automatically based on the shaft 13 rotation speed signal!

[0071] As described above, the plate compactor can be made compact, and the diaphragm can be heated to a predetermined temperature range in which the asphalt mixture does not adhere to the diaphragm in a relatively short time, and the state can be stably maintained. It becomes.

[0072] In addition, since the plate compactor 1 includes the generator 3, when the asphalt pavement is not performed, the power of the generator 3 can be used for other purposes (for example, for lighting).

Note that the above-described embodiment is an example, and various modifications can be made without departing from the spirit of the present invention, and the present invention is not limited to the above-described embodiment. Industrial applicability

[0074] The present invention can be applied to an application in which it is indispensable to heat the diaphragm to a predetermined temperature in a relatively short time to stably maintain the state.

Claims

The scope of the claims

[1] An engine, a generator drivably connected to the engine, a vibrator driven by the engine, and a heating element electrically connected to the generator are mounted and heated by the heat generator A plate compactor comprising a vibration plate that vibrates by the vibrator and compacts the asphalt mixture,

First power transmission means for transmitting power from the engine to the generator;

Second power transmission means for transmitting and interrupting power from the engine to the vibrator; temperature detection means for detecting the temperature of the diaphragm;

Based on the temperature of the diaphragm detected by the temperature detecting means, the operation of the heating element is performed so that the temperature of the diaphragm is within a predetermined temperature range in which the asphalt mixture does not adhere to the diaphragm. And after the engine is started, the power from the engine to the vibrator is cut off until the temperature of the diaphragm reaches a predetermined temperature range, and after the temperature of the diaphragm reaches the predetermined temperature range, Control means for controlling the operation of the second power transmission means so as to transmit power to

Plate compactor provided.

[2] The first power transmission means includes a first pulley mounted on a drive shaft of the engine.

A second pulley mounted on the first driven shaft of the generator, and a first belt wound around the first pulley and the second pulley,

The second power transmission means includes a third pulley mounted on the engine drive shaft at a predetermined distance from the first pulley in the axial direction, and a second driven shaft of the vibrator. A fourth pulley mounted, and a second belt wound around the third pulley and the fourth pulley,

2. The plate compactor according to claim 1, further comprising a clutch for engaging and disengaging the third pulley with respect to a drive shaft of the engine.

3. The plate compactor according to claim 2, wherein the clutch is an electromagnetic clutch.

4. The plate compactor according to claim 4, wherein the temperature detecting means is a thermostat.

[5] An engine, a generator drivably connected to the engine, a vibrator driven by the engine, and a heating element electrically connected to the generator are attached to generate the heat. A plate compactor comprising a diaphragm heated by a body and vibrated by the vibrator to compact an asphalt mixture,

The heating element includes a terminal that is electrically connected to the wiring from the generator, and a connection portion between the terminal and the wiring from the generator includes:

A first fixing member having a penetrating portion connected to the terminal;

A second fixing member that is inserted into the through portion of the first fixing member and electrically connected to the terminal when the terminal is connected to the first fixing member;

A position restricting member that is externally movably attached to the wiring and is attached to the generator side of the penetrating portion of the first fixing member to restrict the position of the wiring;

A resilient member surrounding the periphery of these terminals with the first fixing member, the second fixing member and the position regulating member attached to the terminal;

A plate compactor.

[6] The heating element includes a terminal that is formed in a rod shape, has an external thread on an outer peripheral surface, and is electrically connected to the generator protruding in an axial direction from one end of the heating element. An internal thread to be screwed to the terminal is formed on the inner peripheral surface of the through portion of the first fixing member,

The second fixing member is electrically connected to an end of the wiring from the generator on the terminal side, and the terminal is screwed into a penetrating portion of the first fixing member. The plate compactor according to claim 5, wherein the plate compactor is configured to be inserted and fixed to a predetermined position of the penetrating portion.

[7] The plate control according to [5], wherein the position regulating member is formed with a material force having elasticity, and is formed in a truncated cone shape and has a hole through which the wiring passes. No << Kuta.

8. The plate compactor according to claim 5, wherein the elastic member is made of an insulating material force and is formed in a tube shape.