JP7300688B1 - Roller compactor - Google Patents

Abstract

A roller compactor 1 in which the weight of a vibrator 3 is reduced to improve the vertical impact vibration to the ground and the speed in the roller compaction movement direction 46 is provided. A vibration exciter (3) includes an electromagnet (15) standing upright on a rolling plate (5) and having upper and lower magnetic poles, a magnetic attracting body (18) made of a ferromagnetic material arranged above the electromagnet (15), a plate-like spring member (72), Both ends 72 a , 73 a : 72 b , 73 b of 73 are fixed to form a virtual parallelogram. The control circuit 34 repeatedly excites and demagnetizes the electromagnet 15 with the electric power of the battery 2 . The magnetic attracting body 18 excites the electromagnet 15, is displaced to the lower left in FIG. Due to the restoring force of the spring, they are displaced to the upper right in FIG. 1 and separated. [Selection diagram] Fig. 1

Description

TECHNICAL FIELD The present invention relates to a roller compactor, also called a plate compactor, which is used in, for example, asphalt paving work and the like, and compacts an asphalt surface layer or the like by roller-pressing while applying vibration to roller plates.

An example of a conventional roller compaction device is described in Patent Document 1. The rolling compaction device of Patent Document 1 includes an internal combustion engine, a vibration exciter having an eccentric weight that is rotationally driven by transmission of the rotational power of the internal combustion engine via a transmission mechanism such as a belt, and vibration of the vibration exciter. A tray-shaped rolling plate that compacts the asphalt mixture on the asphalt pavement surface by rolling while generating impact is provided.

JP 2011-190587 A

In the prior art, since the internal combustion engine is provided as a drive source for the vibration exciter, the power loss due to the transmission mechanism that transmits the rotational power of the internal combustion engine is large, and the configuration of the internal combustion engine and the vibration exciter is large. Since it is heavy, there are problems such as a large power loss from this point of view, difficulty in transporting it to a construction site, and a large drive output for rolling compaction due to ground impact vibration. It is also desirable to reduce _CO2 gas and noise generated from internal combustion engines to improve the environment.

In order to solve the above-described problems of the prior art, a configuration may be considered in which an electric motor for rotationally driving the eccentric weight of the vibration exciter and a battery for energizing the electric motor are provided instead of the internal combustion engine. In this proposed rolling compactor, the weight of each of the vibration exciter, the electric motor, and the battery is large, and the generated vertical ground impact vibration is insufficient. I ran into a new problem: low.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a roller compacting device that does not include an internal combustion engine, has a lighter weight exciter, and improves ground impact vibration and roller compaction movement speed.

As for the reference numerals, the same numerals or numerals increased by 100 or 200 are attached to corresponding components in each embodiment.

The present invention
(a) a rolling plate 5;
(b) Vibrators 3 (FIGS. 1 to 8, 13), 103 (FIGS. 9 to 10), and 203 (FIGS. 11 to 12),
(b1) electromagnets 15, 115, 215;
(b2) Magnetic attractors 18, 118, and 218 made of a ferromagnetic material and magnetically attracted by the excitation of the electromagnets 15, 115, and 215;
(b3) either one of the electromagnets 15, 115, 215 and the magnetic attractors 18, 118, 218 is fixed to the rolling plate 5;
(b4) Spring members 72, 73: 172, 173 provided between the electromagnets 15, 115, 215 and the magnetic attraction bodies 18, 118, 218,
When the electromagnets 15, 115, 215 are excited, the other of the electromagnets 15, 115, 215 and the magnetic attracting bodies 18, 118, 218 is displaced in a predetermined direction against the spring force by the magnetic attraction force, thereby generating a magnetic field. adsorb,
By demagnetizing the electromagnets 15, 115, 215, the other of the electromagnets 15, 115, 215 and the magnetic attracting bodies 18, 118, 218 is displaced in the other direction opposite to the one direction by the released spring restoring force. away,
The reciprocating displacement between the magnetic attraction and the separation of the other of the electromagnets 15, 115, 215 and the permanent magnet pieces 18, 118, 218 generates a force having a component in the predetermined rolling compaction moving direction 46 of the rolling plate 5. a vibration exciter 3, 103 comprising a spring member 72, 73: 172, 173 for causing
(c) a battery 2;
(d) A rolling compactor comprising a control circuit 34 that excites the electromagnets 15 and 115 with the power of the battery 2, cuts off the power to demagnetize them, and repeats excitation and demagnetization.

According to the present invention, the electromagnets 15, 115, 215 of the vibration exciters 3, 103 are repeatedly energized and demagnetized by the power of the battery 2 being supplied and cut off by the action of the control circuit 34. FIG. One of the electromagnets 15 , 115 , 215 and the magnetic attractors 18 , 118 , 218 is fixed to the rolling plate 5 , and the other is resiliently displaceable by spring members 72 , 73 : 172 , 173 . The electromagnets 15, 115, 215 and the magnetic attracting bodies 18, 118, 218 repeatedly magnetically attract and separate due to the magnetic attraction force due to excitation, the spring restoring force due to demagnetization, and their own weight. The other of the bodies 18, 118 and 218 reciprocates in one predetermined direction and in the other opposite direction, and this reciprocating displacement motion generates a force having a component in the predetermined rolling movement direction 46 of the rolling plate 5. be done.

Vibrators 3, 103, 203 are configured with electromagnets 15, 115, 215, magnetic attractors 18, 118, 218, and spring members 72, 73: 172, 173. , a transmission mechanism such as a belt and an eccentric weight that is rotationally driven can be eliminated. This simplifies the configuration and reduces the weight. Therefore, it is possible to sufficiently exert the vertical ground impact vibration generated against the rolling surface such as the asphalt surface layer, and to increase the speed of the rolling movement.

When the electromagnets 15, 115, 215 are excited, the other of the electromagnets 15, 115, 215 and the magnetic attracting bodies 18, 118, 218 is pulled by the magnetic attraction force of the spring members 72, 73:172, 173. It is displaced against the spring force and is magnetically attracted. The spring members 72, 73: 172, 173 are mutually reciprocatingly displaced by the electromagnets 15, 115, 215 and the magnetic attracting bodies 18, 118, 218 by this magnetic attraction, the restoring force of the spring released by the separation, the self weight, and the like. and the other, a force having a component in a predetermined rolling compaction movement direction 46 of the rolling plate 5 is generated. That is, the displacement direction due to mutual magnetic attraction and separation between the electromagnets 15 , 115 , 215 and the magnetic attractors 18 , 118 , 218 has a component of the predetermined rolling movement direction 46 of the rolling plate 5 . Thus, the rolling plate 5 can move in a predetermined rolling direction 46, which can be called the advancing direction, for example, while oscillating up and down.

The magnetic attractant 18, 118, 218 is made of ferromagnetic material, can be iron, cobalt, nickel and their alloys, other materials, is not magnetized or is the core of the electromagnet 15, 115, 215. It may be a permanent magnet piece made of neodymium or the like, which is set to have a polarity that magnetically attracts the magnetic pole of the core when the coil wound around is excited. Further, the magnetic attracting bodies 18, 118, 218 may be replaced by electromagnets, and the electromagnets are always excited such that they are magnetically attracted when the electromagnets 15, 115, 215 are excited and separated when demagnetized, or the electromagnets 15, 115, and 215 are configured to repeat excitation and demagnetization.

The present invention, for example, as shown in FIGS. 1 to 8,
The vibrator 3 is lighter than the battery 2,
The vibrator 3 and the battery 2 are displaced along the rolling movement direction 46 of the rolling plate 5,
The electromagnet 15 is fixed to the rolling plate 5,
The magnetic attracting body 18 is attached to the rolling plate 5 via spring members 72 and 73,
The spring members 72 and 73 move the magnetic attracting body 18 toward one side of the rolling movement direction 46 (for example, toward the downstream side, that is, toward the front side, toward the left side in FIG. 1) in the natural state where the electromagnet 15 is demagnetized. By holding and energizing the electromagnet 15, the magnetic attracting body 18 is elastically pushed toward one side of the rolling compaction movement direction 46 (for example, further downstream, that is, further forward, further leftward in FIG. 1). characterized by being displaced

In addition, the present invention, for example, as shown in FIGS. 9 and 10: FIGS. 11 and 12,
The vibrators 103 and 203 are lighter than the battery 2,
The vibrators 103 and 203 and the battery 2 are displaced along the rolling movement direction 46 of the rolling plate 5,
The magnetic attraction bodies 118 and 218 are fixed to the rolling plate 5,
The electromagnets 115, 215 are attached to the rolling plate 5 via spring members 172, 173,
The spring members 172, 173 move the electromagnets 115, 215 toward one side of the rolling movement direction 46 (for example, toward the downstream side, ie, toward the front side, in the natural state in which the electromagnets 115, 215 are demagnetized). left side), and by energizing the electromagnets 115 and 215, the electromagnets 115 and 215 are moved further toward one side of the rolling compaction movement direction 46 (for example, further downstream, that is, further forward, FIG. 9, FIG. 9). 11) is elastically displaced to the left.

According to the present invention, the vibration exciters 3, 103, and 203 can be made lighter in weight by simplifying their configurations, so that they can be made lighter than the battery 2. The battery 2 may be stored in a storage case 6, which will be described later. The vibrators 3, 103, 203 correspond to either the electromagnets 115, 215 fixed to the rolling plate 5 or the magnetic attractors 118, 218, and the other has a magnetic attraction force and a spring member 72, 73: 172 and 173 are reciprocatingly displaced by elastic action. 1 to 8, 12, 13), 103 (FIGS. 9 to 10), 203 (FIGS. 11 to 12) are arranged downstream (that is, toward the front), and the heavy batteries 2 are arranged toward the upstream (that is, toward the rear) to form a front-to-rear weight distribution along the rolling movement direction 46 of the rolling plate 5. can. As a result, during the rolling operation, the rolling plate 5 is sprung up as high as possible from the rolling surface such as the asphalt surface layer at the front portion where the light vibrator 3, 103, 203 is arranged, and the state in which it is sprung up. A force directed downstream in the direction of compaction movement 46 can be exerted on the front portion of the compaction plate 5 at . As a result, the ground impact vibration in the vertical direction can be sufficiently exerted, and the speed of forward rolling compaction movement can be increased.

The rear portion of the rolling plate 5 where the heavy battery 2 is arranged has a smaller jump height than the front portion where the vibration exciters 3, 103 and 203 are arranged. This advances the compaction plate 5 and thus the compaction device 1 downstream in the compaction movement direction 46 such that the rear part is pulled or dragged by the front part.

According to the idea of the present invention, the battery 2 and the control circuit 34 are arranged directly above the vibration exciters 3, 103 and 203 on the rolling plate 5 via a vibration isolating member to realize a rammer. The rammer suppresses the movement of rolling compaction, and mainly uses vertical vibration and impact force to reduce voids in the soil and compact it to a high density.

The present invention, as shown in FIG.
A tilting mechanism 65 is provided, and the tilting mechanism 65 is characterized in that the vibration exciters 3, 103, 203 can be tilted and adjusted about the horizontal axis 63 perpendicular to the rolling movement direction 46 with respect to the rolling plate 5. .

According to the present invention, the tilting mechanism 65 of the rolling device 301 can tilt the vibrators 3, 103, 203 about the horizontal axis 63 with respect to the rolling plate 5 by an angle θ (FIG. 13). Therefore, the force generated by the magnetic attraction force between the electromagnets 15, 115, 215 and the magnetic attractors 18, 118, 218 and the spring restoring force released by the spring members 72, 73: 172, 173 due to the separation is Can be adjusted by changing direction. Therefore, it becomes possible to adjust the magnitude of the force having the component in the rolling compaction movement direction 46 . Therefore, the degree of ground impact vibration in the vertical direction against the rolling surface such as the asphalt surface layer and the speed at which the rolling surface moves forward are determined by the battery 2 for periodic excitation and demagnetization supplied to the electromagnets 15 and 115. While suppressing power consumption, it can be set optimally for rolling compaction operation.

The present invention
(e) electromagnets 15, 115, 215;
(f) a magnetic attraction body 18, 118, 218 made of a ferromagnetic material and magnetically attracted by the excitation of the electromagnet 15, 115, 215;
(g) one of the electromagnets 15, 115, 215 and the magnetic attracting bodies 18, 118, 218 is fixed to the body to be excited (rolling plate 5) ;
(h) Spring members 72, 73: 172, 173 provided between the electromagnets 15, 115, 215 and the magnetic attractors 18, 118, 218,
By demagnetizing the electromagnets 15, 115, 215, the electromagnets 15, 115, 215 and the magnetic attraction bodies 18, 118, 218 are separated,
When the electromagnets 15, 115, 215 are excited, the electromagnets 15, 115, 215 and the magnetic attracting bodies 18, 118, 218 are magnetically attracted by the magnetic attraction force against the spring force. Spring members 72, 73: 172, 173 are provided for generating a force having a component in a predetermined movement direction 46 of the object to be oscillated (rolling plate 5) by the restoring force of the spring released by the separation. Vibrator 3 , 103 , 203 .

According to the present invention, the vibrators 3, 103, 203 are configured with the electromagnets 15, 115, 215, the magnetic attractors 18, 118, 218, and the spring members 72, 73: 172, 173. The configuration of the shaker can be simplified and the weight can be reduced. Therefore, the present invention can be implemented in a wide range of technical fields as a power source for a device that moves or remains stationary while vibrating, in addition to rolling compaction of asphalt surfaces.

The present invention, as shown in FIGS. 14 to 17,
(i) the battery 2 is
a battery body 60;
and a terminal 33 that protrudes and extends above the battery body 60 to output power ,
(j) a battery enclosure, the battery enclosure comprising:
(j1) a storage case 6,
a body portion 21 having an upper opening, housing the battery 2 so as to be removable and replaceable , and attached to the rolling plate 5 ;
a storage case 6 including a lid portion 22 that can open and close an opening in the upper portion of the main body portion 21 and stores the control circuit 34;
(j2) electrical connection portions 4 and 64 arranged downward in correspondence with the terminals 33 on the lid portion 22,
With the lid 22 closing the upper opening of the main body 21, the outer peripheral surface of the terminal 33 is elastically contacted at a plurality of contact points in the circumferential direction to supply power to the control circuit 34, and the lid 22 is closed. It is characterized by including electrical connection portions 4 and 64 having connection pieces 32 and 52 separated from the terminal 33 in the vertical axial direction of the terminal 33 with the upper opening of the body portion 21 opened .

According to the present invention, when the operator closes the upper opening of the body portion 21 of the storage case 6 with the lid portion 22, the battery body 60 provided in the body portion 21 protrudes and extends upward. The terminal 33 and the connection pieces 32, 52 of the electrical connection parts 4, 64, which are arranged facing downward in correspondence with the terminal 33, are elastically brought into contact with each other. Thereby, the control circuit 34 and the battery 2 can be connected. The control circuit 34 and the battery 2 can be cut off by opening the cover 22 to open the upper opening of the main body 21 . By opening the lid portion 22 to replace the battery 2, the power supply from the battery 2 to the control circuit 34 is cut off, thereby improving the protection and safety of the control circuit 34 when the battery 2 is replaced .

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing seen from the side of the roller compaction apparatus 1 which shows one embodiment of this invention. FIG. 2 is a cross-sectional view seen from arrow II in FIG. 1 ; FIG. 2 is a rear view seen from the right side of FIG. 1; 1 is a plan view of a rolling compactor 1; FIG. 4 is an electrical circuit diagram associated with electromagnet 15. FIG. FIG. 6 is a waveform diagram for explaining the operation of the embodiment of FIGS. 1 to 5; FIG. FIG. 7 is a diagram schematically showing from the side how the roller compactor 1 of the embodiment of FIGS. 4 is a voltage waveform diagram of excitation power supplied to electromagnets 15, 115, and 215 in each embodiment of the present invention. FIG. It is sectional drawing seen from the side of the roller compaction apparatus 101 which shows other forms of implementation of this invention. FIG. 10 is a cross-sectional view seen from the arrow X in FIG. 9; FIG. 11 is a side cross-sectional view of a rolling compactor 201 showing still another embodiment of the present invention; 12 is a cross-sectional view as seen from arrow XII in FIG. 11; FIG. FIG. 11 is a cross-sectional view of a rolling device 201 having a tilting mechanism 65 showing another embodiment of the present invention; FIG. 8 is a cross-sectional view showing a state in which a terminal 33 provided on a battery body 60 of a battery 2 and a connection piece 32 of an electrical connection portion 4 are connected in the embodiment of FIGS. 1 to 7; 15 is a plan view of the electrical connection portion 4 of FIG. 14; FIG. FIG. 8 is a cross-sectional view showing a state in which a terminal 33 of a battery 2 and a connection piece 52 of an electrical connection portion 64 are connected in another embodiment of the present invention; FIG. 17 is a plan view of the electrical connection portion 64 of FIG. 16;

FIG. 1 is a side cross-sectional view of a rolling compactor 1 showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view seen from arrow II in FIG. The roller compactor 1 of the present invention is used as a roller surface for roller compaction of asphalt surface layers, as well as for roller compaction of paving stones such as cobblestones, and roller compaction of surface layers such as stones arranged on sandy ground. The rolling compaction device 1 basically comprises a battery 2 as a power source, a vibrator 3 driven by the power of the battery 2, and a rolling plate that compacts the rolling surface such as the asphalt surface layer by vibration of the vibrator 3. 5. The rolling plate 5 has one end 11 downstream (i.e., forward, left in FIG. 1) in the direction of rolling movement 46 and the other end 12 upstream (i.e., rearward, right in FIG. 1). , is formed in the shape of a tray in which the periphery of the flat plate portion is raised. Battery 2 may be, for example, a secondary battery such as a lead-acid battery or a lithium-ion battery.

The vibration exciter 3 includes an electromagnet 15 , a magnetic attraction body 18 , and spring members 72 and 73 . The magnetic attraction body 18 is made of a ferromagnetic material and magnetically attracts the electromagnet 15 to be excited.

The electromagnet 15 is composed of an elongated rod-shaped ferromagnetic material core 16 having an axis extending vertically and a coil 17 wound around the core 16 . The free end 16a of the core 16 faces the magnetic attractor 18 with a gap below the magnetic attractor 18 when the coil 17 and thus the electromagnet 15 is demagnetized, as shown in FIG. When 15 is excited, one magnetic pole is formed to magnetically attract the magnetic attraction body 18 . The base end portion 16b of the core 16 is vertically erected on the pedestal 8, and forms the other magnetic pole when the electromagnet 15 is excited. The pedestal 8 is fixed to the rolling plate 5 .

Spring members 72 , 73 are provided between the electromagnet 15 , and thus the base 8 , and the magnetic attraction body 18 . The spring members 72 and 73 are elongated plate-like or rod-like and have the same size and shape. A total of four are arranged symmetrically on the left and right of the . The oblique upper and lower longitudinal ends 72a, 72b: 73a, 73b of the spring members 72, 73 are respectively fixed to the magnetic attraction body 18 and the base 8 by fixing means such as fixing bolts or welding. These upper and lower ends 72a, 72b: 73a, 73b are, for example, imaginary parallel 4 in a virtual vertical plane including a rolling compaction moving direction 46 parallel to the rolling plate 5 when the rolling plate 5 is placed horizontally. located at each vertex of the rectangle. The spring members 72 and 73 can be elastically displaced and bent in the direction of rolling movement 46 (left and right in the plane of FIG. 1) at the upper end portions 72a and 73a with respect to the lower end portions 72b and 73b. In addition, the upper ends 72a, 73a of the spring members 72, 73 are downstream (i.e., forward, in FIG. left), and the spring members 72, 73 are slanted to the upper left in FIG. When the electromagnet 15 is demagnetized, the spring members 72 and 73 linearly extend obliquely to the upper left as shown in FIG. In this state, the pedestal 8 and the magnetic attraction body 18 together form a parallelogram, and in the demagnetized state of the electromagnet 15, the inclination angle of the spring members 72, 73 is , 15° to 20°, or 15° to 25° with respect to the direction perpendicular to its base 8 .

By demagnetizing the electromagnet 15 , the magnetic attracting body 18 is spaced above the free end portion 16 a of the electromagnet 15 . For example, the spring members 72 and 73 inclined with respect to the horizontal rolling compaction movement direction 46 move the magnetic attracting body 18 toward one side of the rolling compaction movement direction 46 (for example, in the natural state where the electromagnet 15 is demagnetized). , downstream or forward, left in FIG. 1).

When the electromagnet 15 is excited, the magnetic attracting body 18 is displaced to the lower left in FIG. By energizing the electromagnet 15, the spring members 72 and 73 move the magnetic attracting body 18 further toward one side of the rolling compaction movement direction 46 (for example, further downstream, that is, further forward, further leftward in FIG. 1). elastically displaced to The spring members 72 and 73 generate a force having a component in a predetermined rolling movement direction 46 of the rolling plate 5 by this magnetic attraction and the spring restoring force released by the separation.

3 is a rear view seen from the right side of FIG. 1, and FIG. 4 is a plan view of the roller compaction device 1. FIG.
At the other end 12 of the rolling plate 5 upstream in the rolling direction 46 (that is, rearward, right in FIG. 1), there is a gripping portion 13a that can be gripped by the operator and both arms 13b. A U-shaped handle 13 is provided. Both arms 13b of the handle 13 are provided on the rolling plate 5 via a vibration isolating member 29 made of rubber or the like. The operation switch 14 is arranged on the grip portion 13a. The operator can operate the operation switch 14 while gripping the grip portion 13a of the handle 13 and operating the vehicle. The location where the operation switch 14 is provided is not limited to the grip portion 13a of the handle 13, and may be provided, for example, on the outer surface of the cover portion 22 of the storage case 6, which will be described later. The operation switch 14 is connected to the control circuit 34 .

FIG. 5 is an electrical circuit diagram associated with electromagnet 15 . The coil 17 of the electromagnet 15 is connected to the switching circuit 27 of the control circuit 34 via an electric wire 26 such as a flexible wire, and the switching circuit 27 is connected to the battery 2 via the electrical connection 4 . In the control circuit 34, the switching circuit 27 is controlled by a processing circuit 28 implemented by a microcomputer or the like. The processing circuit 28 of the control circuit 34 controls the repeated demagnetization and excitation of the electromagnet 15 in accordance with the operation of the operation switch 14 .

FIG. 6 is a waveform diagram for explaining the operation of the embodiment of FIGS. 1-5. FIG. 6(1) shows the ON/OFF operation of the switching circuit 27. FIG. ON excitation periods W1 at times t1 to t2 and t3 to t4 and OFF demagnetization periods W2 at times t2 to t3 and t4 to t5 are periodically repeated. For example, the frequency may be 60 Hz, W1=W2, the DC output voltage of the battery 2 may be 50-72 V, typically 48 V, and the power consumption of the electromagnet 15 may be 1-2 kW.

FIG. 6(2) shows temporal changes in the vertical position of the magnetic attraction member 18 that is displaced by the excitation and demagnetization of the electromagnet 15. FIG. By energizing the electromagnet 15 during the excitation period W1 of times t1 to t2 and t3 to t4, the magnetic attracting body 18 moves from the upper limit position H in FIGS. is elastically bent by the magnetic attraction force of the electromagnet 15 and further tilted, it is displaced to the lower left in FIG. The lower limit position L is reached at times t1a and t3a. As the electromagnet 15 is demagnetized during the demagnetization period W2 of times t2 to t3 and t4 to t5, the magnetic attracting body 18 is displaced from the lower limit position L to the upper right in FIG. Then, it reaches the upper limit position H at times t2a and t4a and returns.

FIG. 6(3) shows temporal changes in the vertical velocity of the magnetic attraction member 18 that is displaced by the excitation and demagnetization of the electromagnet 15 . When the electromagnet 15 is excited during the excitation period W1, the magnetic attraction body 18 is displaced downward from the upper limit position H of FIGS. 1 and 2 to the lower limit position L of magnetic attraction at a speed v1. By demagnetizing the electromagnet 15 during the demagnetizing period W2, the magnetic attracting body 18 moves from the initial rising speed v2 from the upper limit position H in FIGS. It is displaced upward at a lower rising speed. For velocity, for example |v1|>|v2|.

FIG. 6(4) shows the force applied to the rolling plate 5 by the magnetic attracting body 18 reciprocally displaced by the magnetic attraction force generated by the excitation of the electromagnet 15 and the spring restoring force of the spring members 72 and 73 in the direction of rolling movement 46. Figure 3 shows the time variation of the magnitude of the components. First, in the excitation period W1, the magnetic attracting body 18 is displaced downstream (to the left in FIG. 1) in the direction of rolling compaction movement 46 by a large magnetic attraction force against the spring force of the spring members 72 and 73. . As a result, a force P1 ((4) in FIG. 6) acts on the rolling plate 5 in the direction 46 of rolling movement. At this time, the magnetic attraction member 18 also descends at a high speed v1 ((3) in FIG. 6), so an upward force acts on the rolling plate 5 .

During the next demagnetization interval W2, the magnetic attracting body 18 is displaced upstream (to the right in FIG. 1) in the rolling compaction movement direction 46 by the spring restoring force of the spring members 72 and 73 . Due to the reaction to the displacement of the magnetic attracting member 18, a force P2 ((4) in FIG. 6) acts on the pressure plate 5 in the direction 46 of the pressure movement. At this time, the magnetic attracting body 18 also rises at the speed v2 ((3) in FIG. 6), so an upward force acts on the rolling plate 5 . For example, P1<P2.

FIG. 7 is a diagram schematically showing from the side how the rolling compactor 1 according to the embodiment of FIGS. 1 to 6 rolls and moves in the rolling compaction movement direction 46 and advances downstream. FIG. 7(1) shows a state in which the rolling plate 5 is in a horizontal posture on the rolling surface such as the asphalt surface layer at time t1 of the excitation period W1 in FIG. 6(1). FIG. 7(2) shows a state after time t2 when the magnetic attraction member 18 is displaced downstream in the rolling compaction movement direction 46 (lower left in FIG. 1) from time t1 of the excitation period W1 in FIG. 6(1). . The roller plate 5 moves downstream in the roller compaction movement direction 46 with its downstream one end portion 11 rising. Next, FIG. 7(3) shows a state from time t2 of the demagnetization period W2 in FIG. 6(1) to time t2a at which the magnetic attracting body 18 is displaced upstream in the rolling compaction movement direction 46 (upper right in FIG. 1). indicates The rolling plate 5 further rises at its downstream one end 11, and the other upstream end 12 is on the rolling surface or rises with a very small gap from the rolling surface, and the other end 12 rises from the rolling surface. It moves further downstream in the direction of rolling movement 46 in such a manner that it is dragged on the pressure surface. FIG. 7(4) shows the state after around time t2a during the demagnetization period W2 in FIG. 6(1). One end portion 11 of the rolling plate 5 descends and returns to the state shown in FIG. 7(1).

FIG. 8 is a voltage waveform diagram of exciting power supplied to the electromagnet 15 in other embodiments of the present invention. A power supply circuit is provided in place of the switching circuit 27 in the control circuit 34 of FIG. 5, and excitation power is supplied to the electromagnet 15 from this power supply circuit. In one embodiment of the present invention, as shown in FIG. 8A, the electromagnet 15 is supplied with a voltage having a cycle of a first excitation period W11 of one polarity, a demagnetization period W12, and a second excitation period W13 of the other polarity. may be implemented to provide AC square wave power.

In another embodiment of the present invention, the electromagnet 15 may be provided with a power supply circuit that generates a sinusoidal AC voltage and supplies AC power, as shown in FIG. 8(2). When the AC voltage is above the voltage level V11 and below the voltage level V12, the periods W11, W12, and W13 similar to those in FIG. The voltage value, frequency, etc. of the voltage from these power supply circuits can be changed and adjusted by controlling the processing circuit 28 by operating the operation switch 14 .

FIG. 9 is a side cross-sectional view of a rolling compactor 101 showing another embodiment of the present invention, and FIG. 10 is a cross-sectional view seen from the arrow X in FIG. The embodiments of FIGS. 9 and 10 are similar to the previously described embodiments, and corresponding components are numbered the same or incremented by one hundred. To summarize, in the vibration exciter 3 in the embodiment of FIGS. is resiliently reciprocatingly displaced in the lower left and upper right directions in FIG. , the magnetization and demagnetization of the electromagnet 115 below the magnetic attraction member 18 fixed to the rolling plate 5 causes the electromagnet 115 to be elastically moved upward and downward in FIG. It has a configuration for reciprocating displacement.

Vibrator 103 includes electromagnet 115 , magnetic attracting body 118 , and spring members 172 and 173 . The magnetic attraction body 118 is made of a ferromagnetic material and magnetically attracts the electromagnet 115 to be excited. The magnetic attracting body 118 is fixed to the rolling plate 5 by support members 47 and 48 .

Electromagnet 115 has core 41 and coil 42 . The core 41 has a drum portion 43 extending laterally on the left and right sides of FIG. 9 and magnetic poles 44 and 45 extending upward from both ends of the drum portion 43. The overall shape is U-shaped as shown in FIG. formed and made of ferromagnetic material. The coil 42 is wound around the outer circumference of the winding drum portion 43 . A lower portion of the core 41 is fixed to a base 49 . Base 49 may be a ferromagnetic material such as iron, or a non-magnetic material such as synthetic resin. The magnetic poles 44, 45 of the core 41 face the magnetic attractant 118 with a space below the magnetic attractor 118 when the coil 42 and thus the electromagnet 115 are demagnetized, as in FIG. By energizing 115 , a magnetic pole is formed and magnetically attracted to the magnetic attraction member 18 .

Spring members 172 , 173 are provided between the electromagnet 115 , and thus the base 49 , and the magnetic attraction body 118 . The spring members 172 and 173 are elongated plate-like or rod-like and have the same size and shape. A total of four are arranged symmetrically on the left and right of the . The oblique upper and lower longitudinal ends 172a, 172b: 173a, 173b of the spring members 172, 173 are respectively fixed to the magnetic attraction member 118 and the base 49 by fixing means such as fixing bolts or welding. These upper and lower ends 172a, 172b: 173a, 173b form parallelograms in an imaginary vertical plane including a rolling movement direction 46 parallel to the rolling plate 5 when the rolling plate 5 is placed horizontally. located at each vertex. The spring members 172 and 173 can be elastically displaced and flexed in the rolling compaction movement direction 46 (left and right in the plane of FIG. 9) at the upper end portions 172a and 173a with respect to the lower end portions 172b and 173b. In addition, the upper ends 172a, 173a of the spring members 172, 173 are located upstream (i.e., rearward, in FIG. right), and the spring members 172, 173 are slanted to the upper right in FIG. When the electromagnet 115 is in a demagnetized state, the spring members 172 and 173 are linearly extended diagonally to the upper right as shown in FIG. , form a parallelogram together with the base 49 and the magnetic attraction body 118 .

By demagnetizing the electromagnet 115 , the magnetic poles 44 and 45 of the electromagnet 115 are separated below the magnetic attracting body 118 . For example, the spring members 172 and 173 inclined with respect to the horizontal compaction movement direction 46 cause the electromagnet 115 to move toward one side of the compaction movement direction 46 (for example, downstream) in the natural state where the electromagnet 115 is demagnetized. (Left side in FIG. 9).

When electromagnet 115 is excited, electromagnet 115 is displaced to the upper left in FIG. When the electromagnet 115 is excited, the spring members 172 and 173 spring the electromagnet 115 toward one side of the rolling compaction movement direction 46 (for example, further downstream, that is, further forward, further leftward in FIG. 9). voluntarily displaced. The spring members 172 and 173 generate a force having a component in a predetermined rolling movement direction 46 of the rolling plate 5 by this magnetic attraction and the restoring force of the spring released by the separation.

The electromagnet 115 is controlled to repeat demagnetization and excitation by the control circuit 34 shown in FIG. As a result, operations similar to those shown in FIGS. 6 and 7 are achieved, and the rolling plate 5 can vibrate up and down and move in the rolling direction 46 while generating ground impact. As described above, the vibration exciter 3 shown in FIGS. 1 to 8 has a configuration in which the magnetic attracting body 18 is elastically displaced by the spring members 72 and 73 above the electromagnet 15 fixed to the rolling plate 5. 9 and 10, the electromagnet 115 is elastically displaced by the spring members 172 and 173 below the magnetic attracting body 18 fixed to the rolling plate 5 . Therefore, the operation of the embodiment shown in FIGS. 9 and 10 can be understood by replacing the displacement of the magnetic attracting body 18 in FIGS. The electromagnet 115 may be controlled to repeatedly demagnetize and excite by not only the control circuit 34 of FIG. 5 but also other configurations.

FIG. 11 is a side cross-sectional view of a rolling compactor 201 showing another embodiment of the present invention, and FIG. 12 is a cross-sectional view seen from arrow XII in FIG. The embodiments of FIGS. 11 and 12 are similar to the previously described embodiments, and each corresponding component is numbered the same or 200 higher. It should be noted that, in the vibrator 203 of this embodiment, the magnetization and demagnetization of the inverted U-shaped electromagnet 215 above the magnetic attracting body 218 fixed to the rolling plate 5 causes the electromagnet 215 to act as a spring member. 172 and 173 elastically reciprocate diagonally to the lower left and upper right of FIG. The electromagnet 215 is configured by winding the coils 42 around the magnetic poles 44 and 45 of the core 41 and fixed to the mounting member 50 . The mounting member 50 is attached by spring members 172, 173 to the rolling plate 5 or to the magnetic attracting body 218 fixed to the rolling plate 5 in the same manner as described above, forming a virtual parallelogram.

In another embodiment of the present invention, the vibration exciter 3 in FIGS. 1 to 8, the vibration exciter 103 in FIGS. 9 and 10, and the vibration exciter 203 in FIGS. 11 and 12 are turned upside down. may be configured

In order to prevent the generation of noise caused by contact between the magnetic poles of the electromagnets 15, 115, and 215 and the magnetic attraction bodies 18, 118, and 218 during magnetic attraction, displacement of the displaced magnetic attraction body 18 and the electromagnets 115 and 215 is controlled immediately before contact. Stop members, such as limiting stops, may be provided fixedly to the rolling plate 5 in association with their magnetic attractors 18, electromagnets 115, 215, or spring members 72, 73: 172, 173, or the like.

In still another embodiment of the present invention, the electromagnets 15, 115, 215 may have not only the above configuration but also other configurations. A configuration in which three magnetic poles are sequentially provided in the rolling compaction movement direction 46 facing the magnetic attracting bodies 18, 118, and 218 and a coil is arranged in the center thereof may be employed.

FIG. 13 is a side view of a rolling compactor 301 showing another embodiment of the present invention. The rolling compaction device 301 includes a tilting mechanism 65 . The tilting mechanism 65 allows the vibration exciter 3 to be tilted and adjusted with respect to the rolling plate 5 about a horizontal axis 63 perpendicular to the rolling movement direction 46 . A downstream end 8a of the pedestal 8 of the vibration exciter 3 in the direction of rolling movement 46 is attached to a bracket 69 provided on the rolling plate 5 by a pin shaft having a horizontal axis 63 so as to be angularly displaceable. An upstream end portion 8b of the pedestal 8 in the rolling compaction movement direction 46 is detachably attached to one of a plurality of adjustment holes 10 formed at intervals above and below an adjusting member 9 erected on the rolling compaction plate 5. It is locked by an adjustment pin 7 that passes through the . Thus, the tilting mechanism 65 can tilt the pedestal 8 of the vibration exciter 3 so that the angle θ (FIG. 13) about the horizontal axis 63 can be adjusted.

According to the tilting mechanism 65, the direction of the force generated by the magnetic attraction between the electromagnet 15 and the magnetic attraction body 18 and the spring restoring force released by the separation by the spring members 72, 73: 172, 173 is changed. can be adjusted. Therefore, it becomes possible to adjust the magnitude of the force having the component in the rolling compaction movement direction 46 . Therefore, the degree of ground impact vibration in the vertical direction on the rolling surface such as the asphalt surface layer and the speed at which the rolling surface moves forward are determined by the consumption of the battery 2 for periodic excitation and demagnetization supplied to the electromagnet 15. It can be set optimally for compaction operation while reducing power consumption. Not only the vibration exciter 3 but also the other vibration exciters 103 and 203 can be tilt-adjustable.

FIG. 14 is a sectional view showing a state in which the terminal 33 provided on the battery main body 60 of the battery 2 and the connection piece 32 of the electrical connection portion 4 provided on the lid portion 22 are connected in the embodiment of FIGS. , and FIG. 15 is a plan view of the electrical connection portion 4 of FIG. The rolling compactor 1 includes a housing case 6 capable of housing the battery 2 and the control circuit 34, as shown in FIG. The storage case 6 has an open top and includes a body portion 21 capable of storing the battery 2 and a lid portion 22 capable of storing the control circuit 34 . The body portion 21 is attached to the roller plate 5 via the vibration isolating member 19 . The lid portion 22 has a front side portion connected to the body portion 21 via a hinge 25 so as to be openable and closable, and a rear side portion locked to the body portion 21 using a lock 67 such as a snap lock. .

Referring to FIG. 14 , terminal 33 of battery 2 is arranged on top surface 37 of battery body 60 so as to protrude upward from top surface 37 . The electrical connection portion 4 includes a connection portion 31 and an electrode plate 40 . The connecting portion 31 includes a connecting piece 32 and a connecting pin 36 . The connection portion 31 is electrically connected to the terminal 33 when the lid portion 22 is closed. One of the pair of terminals 33 is shown in FIG. 12 and the like, and the other has the same configuration. A control circuit 34 provided in the lid portion 22 is connected to the connection portion 31 via the electrode plate 40 . The connecting portion 31 includes a plurality of (for example, six) connecting pieces 32 arranged radially on the terminal 33 in a plan view of FIG. 15 in a state where the lid portion 22 is closed. The terminal 33 may be, for example, a column having a diameter D of 20 mm and a height of 30 mm, but may also have a prismatic shape (for example, a hexagonal columnar shape) so as to make surface contact with the contact portion 35 of the connecting piece 32 .

The connection piece 32 is made by bending an elongated flat plate made of phosphor bronze or the like so as to be elastically deformable. Each connection piece 32 has a C-shaped curved portion 38 whose cross section projects inwardly of the terminal 33 , a contact portion 35 that continues to the upper portion of the curved portion 38 , and a contact portion 35 that connects to the upper surface 37 of the battery main body 60 . and a laterally extending plate portion 39 above and parallel to the upper surface 37 . The flat plate portion 39 is connected to the electrode plate 40 of the control circuit 34 , stacked vertically and fixed with the connection pin 36 . When the cover 22 is closed, the contact portion 35 connected to the curved portion 38 contacts the terminal 33 in an elastically deformable state, and the contact end 30 projecting downward from the curved portion 38 contacts the upper surface 37 of the battery main body 60 . , and suppresses transmission of vibration transmitted to the battery 2 to the control circuit 34 .

Since the horizontal gap W1 (FIG. 14) between the contact ends 30 facing each other around the terminal 33 in the connection portion 31 is larger than the diameter D of the terminal 33, the operator performs the operation to close the lid portion 22. The terminal 33 can be inserted into the connection portion 31 from the lower portion of the connection portion 31 by simply inserting the terminal 33 into the connection portion 31 . Thereby, the control circuit 34 and the battery 2 can be electrically connected by a simple operation. In addition, the operator can release the state in which the terminal 33 is inserted into the connecting portion 31 from the lower portion thereof simply by performing an operation to open the lid portion 22 . As a result, the electrical connection between the control circuit 34 and the battery 2 can be released with a simple operation.

FIG. 16 is a cross-sectional view showing a state in which the terminal 33 of the battery 2 and the connecting piece 52 of the electrical connection portion 64 are connected according to another embodiment of the present invention, and FIG. is a plan view of the. The electrical connection 64 shown in FIGS. 16 and 17 is similar to the electrical connection 4 shown in FIGS. 14 and 15, so the partially different configuration will be mainly described.

A terminal 33 protruding from an upper surface 37 of a battery body 60 of the battery 2 is electrically connected to a connecting portion 61 provided on the lid portion 22 with the lid portion 22 closed. The connection portion 61 includes a plurality of (for example, six) connection pieces 52 arranged radially, a coil spring 57 , and a connection pin 56 .

The connection piece 52 is made by bending an elongated flat plate made of phosphor bronze or the like so as to be elastically deformable. Each connecting piece 52 includes a curved portion 54 , a contact portion 59 connected to the curved portion 54 near the terminal 33 , and a connecting portion 59 connected to the upper portion of the curved portion 54 and extending above the upper surface 37 of the battery body 60 in a lateral direction parallel to the upper surface 37 . and a flat plate portion 55 . The flat plate portion 55 is connected to the electrode plate 40 of the control circuit 34 , stacked vertically and fixed with a connection pin 56 . When the lid portion 22 is closed, the contact portion 59 of the curved portion 54 contacts the terminal 33 in an elastically deformable state, and the contact end 53 of the curved portion 54 elastically deforms against the upper surface 37 of the battery body 60 . and suppresses transmission of the vibration transmitted to the battery 2 to the control circuit 34 . The contact portion 59 is connected to a portion of the curved portion 54 that is convexly curved outward (that is, in a direction away from the terminal 33 ) and swelled, via the contact end 53 that is convex downward, and is elastically attached to the terminal 33 . It is curved inwardly (that is, closer to the terminal 33) so as to be in direct contact with the terminal.

The coil spring 57 has a common central axis with the connecting piece 52 . The coil spring 57 has a truncated cone shape whose diameter is reduced from the bottom to the top. The upper end of the coil spring 57 is attached to the flat plate portion 55 of the connection piece 52 by welding, for example. A contact portion 59, which is the inner end portion of the curved portion 54, is inserted into the lower end portion of the coil spring 57, and is attached to the contact portion 59 by, for example, welding.

First, the coil spring 57 of the connection portion 61 does not move from the fully open position of the lid portion 22 to just before the fully closed position, that is, immediately after the contact end 53 of the connection piece 52 hits the upper surface 37 of the battery main body 60 . A relatively small spring force is exerted, and then, from before the fully closed position to the fully closed position, it is compressed and a relatively large spring force is exerted. Due to the function of the coil spring 57 , even if the operator accidentally closes the lid 22 forcefully, the coil spring 57 can absorb a part of the impact force acting on the lid 22 . As a result, it is possible to reduce the impact force and prevent the control circuit 34, the electrode plate 40, and the like from being damaged. Moreover, it is possible to reduce the impact force acting on the battery 2 and prevent the battery 2 from being damaged.

14 to 17, the terminal 33 protrudes and extends above the battery body 60, and the connecting portions 31, 61 of the electrical connecting portions 4, 64 have connecting pieces 32, 52. FIG. The connection pieces 32 and 52 elastically contact the outer peripheral surface of the terminal 33 at a plurality of contact points in the circumferential direction in a state in which the lid portion 22 closes the upper opening of the main body portion 21, and the lid portion 22 closes the main body portion. It is separated from the terminal 33 in the vertical axial direction of the terminal 33 with the upper opening of the terminal 21 opened. The configurations of FIGS. 14-17 can be extensively implemented in connection with not only the compaction device 1, but also the compaction devices 101, 201, 301, and other devices.

In the rolling compactor 1, one of a storage case 6 capable of storing the battery 2 and the control circuit 34 and a pedestal 8 of the vibration exciter 3 is fixed to the rolling plate 5, and the other moves in the rolling compaction moving direction. 46 may be provided so as to be positionally adjustable. In this position-adjustable configuration, an elongated long hole is formed in one of the other of the rollers in the direction of rolling compaction movement 46, and the shank of a bolt is inserted into this slot and fixed to the roller plate 5 by tightening with a nut. etc. In this way, too, the front and rear weight distribution of the compaction plate 5 along the compaction movement direction 46 can be adjusted, and the impact vibration of the compaction plate 5 in the vertical direction against the ground can be sufficiently exhibited, and the forward compaction movement speed can be achieved. can be raised. On the rolling plate 5 , the interval along the rolling movement direction 46 between the battery 2 and the vibration exciter 3 may be provided so as to be adjustable.

Although the embodiments of the present disclosure have been described in detail above, the present disclosure is not limited to the above-described embodiments, and various modifications, improvements, etc. are possible without departing from the gist of the present disclosure. be. It goes without saying that all or part of each of the above-described embodiments can be appropriately combined within a non-contradictory range.

1, 101, 201, 301 rolling compactor 2 batteries 3, 103, 203 vibration exciters 4, 64 electrical connection section 5 rolling compaction plate, vibrated body 6 storage case 8, 48 pedestal 13 handle 14 operation switches 15, 115, 215 electromagnets 18, 118, 218 magnetic attraction body 21 main body 22 lid 25 hinges 31, 61 connecting portions 32, 52 connecting piece 33 terminal 34 control circuit
38, 54 curved portions 39, 59 contact portions 39, 55 flat plate portion 46 rolling compaction movement direction 49 base 60 battery body 63 horizontal axis 65 tilt mechanism 72, 73, 172, 173 spring member

Claims (6)

(a) a compaction plate;
(b) a vibration exciter,
(b1) an electromagnet;
(b2) a magnetic attracting body made of a ferromagnetic material and magnetically attracted by the excitation of an electromagnet;
(b3) either one of the electromagnet and the magnetic attracting body is fixed to the rolling plate, and
(b4) A spring member provided between the electromagnet and the magnetic attraction body,
By demagnetizing the electromagnet, the electromagnet and the magnetic attracting body are separated,
When the electromagnet is excited, the electromagnet and the magnetic attracting body are magnetically attracted against the spring force by the magnetic attraction force thereof. a vibration exciter comprising a spring member that generates a force having a component in a defined rolling direction of movement 46;
(c) a battery;
(d) A rolling compactor comprising a control circuit that excites the electromagnet with electric power from the battery, cuts off the electric power to demagnetize the electromagnet, and repeats excitation and demagnetization. A shaker is lighter than a battery,
The vibrator and the battery are displaced along the direction of rolling movement of the rolling plate,
The electromagnet is fixed to the compaction plate,
The magnetic attracting body is attached to the rolling plate via a spring member,
The spring member holds the magnetic attracting body near one of the rolling compaction moving directions in a natural state in which the electromagnet is demagnetized, and when the electromagnet is excited, the magnetic attracting body is further held in one of the rolling compaction moving directions. 2. The roller compactor according to claim 1, wherein the roller is elastically displaced toward the side. A shaker is lighter than a battery,
The vibrator and the battery are displaced along the direction of rolling movement of the rolling plate,
The magnetic attractor is fixed to the compaction plate,
The electromagnet is attached to the rolling plate via a spring member,
The spring member holds the electromagnet in a natural state in which the electromagnet is demagnetized, and when the electromagnet is excited, the electromagnet is elastically moved in one direction. 2. The roller compactor according to claim 1, wherein the roller is displaced linearly. A tilting mechanism is provided, and the tilting mechanism enables tilting adjustment of the vibration exciter about a horizontal axis perpendicular to the rolling movement direction with respect to the rolling plate. Roller compaction device according to. (e) an electromagnet;
(f) a magnetic attraction body made of a ferromagnetic material and magnetically attracted by the excitation of an electromagnet;
(g) one of the electromagnet and the magnetic attracting body is fixed to the body to be vibrated;
(h) a spring member provided between the electromagnet and the magnetic attracting body,
By demagnetizing the electromagnet, the electromagnet and the magnetic attracting body are separated,
When the electromagnet is excited, the electromagnet and the magnetically attracting body are magnetically attracted against the spring force by the magnetic attraction force thereof, and the spring restoring force released by the separation after this magnetic attraction causes the object to be vibrated. A vibration exciter comprising a spring member that generates a force having a component in a predetermined moving direction of (i) the battery is
a battery body;
a terminal that protrudes and extends above the battery body and outputs electric power ,
(j) a battery enclosure, the battery enclosure comprising:
(j1) a storage case,
a main body that has an open top, stores batteries in a removable and replaceable manner, and is attached to a rolling plate ;
a storage case that can open and close an opening in the upper part of the main body and includes a lid that stores the control circuit ;
(j2) an electrical connection portion disposed facing downward on the cover portion corresponding to the terminal,
When the cover closes the opening in the upper part of the main body, it elastically contacts the outer peripheral surface of the terminal at a plurality of contact points in the circumferential direction to supply power to the control circuit , and the cover closes the upper part of the main body. 2. The roller compactor according to claim 1, further comprising an electrical connection portion having a connection piece spaced apart from the terminal in the axial direction above and below the terminal when the opening is open.

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