JP3639375B2 - Compaction machine with steering function - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a compacting machine represented by a plate compactor that applies vibrations to a compression plate by rotation of an eccentric shaft of an exciter and compacts a road surface or the like. In particular, the steering control of the compacting machine is controlled by a handle. The present invention relates to a compacting machine having a steering function that can be performed not only by an operation command of an operator who holds the handle but also by remote operation.
[0002]
[Prior art]
Conventionally, a plate compactor as a compacting machine that uses centrifugal force for compacting in addition to its own weight often uses a single-axis vibration exciter as shown in FIG. That is, the plate compactor of the same figure is a pressing plate 101 that is in direct contact with the pressing road surface, a vibrator 102 that is mounted on the pressing plate 101 and generates vibration by a single eccentric shaft 103 having a weight 103a, Similarly, an engine 105 mounted and fixed on the compression plate 101 via a vibration isolation member 112, and an inverted U-shape or T-shape mounted on the base portion 114 of this engine and raised up obliquely backward in the forward direction of the aircraft The steering handle 116 is provided. Then, by driving the engine 105, the rotational power is transmitted to the exciter 102 through the centrifugal clutch 118 and the belt transmission mechanism 120, thereby generating vibrations in the exciter 102 and reducing the vibrations. This is transmitted to the pressure plate 101.
Now, when the eccentric shaft 103 is rotated counterclockwise (arrow c direction) when the left side of the figure is the front of the plate compactor and the right side is also the rear, the asymmetric frictional force with the road surface The plate compactor moves forward. As the road surface passes through the plate compactor, its own weight is applied while being subjected to vibration, and compaction is achieved.
As described above, the conventional single-shaft vibration type plate compactor applies vibration and forward / backward moving force to the compression plate by the rotation of the eccentric shaft having the weight, and is used while steering the entire body by the steering handle. Therefore, the steering operation is manually performed by the operator pulling the steering handle.
On the other hand, a two-axis exciter type plate compactor is also put into practical use in which the exciter itself has a steering function and performs steering control of the airframe without using a steering handle. This system is an exciter structure of a plate compactor in which eccentric weights are attached to both rotating shafts of a driving shaft and a driven shaft arranged in parallel, and the vibration is transmitted to the compression plate by the centrifugal force generated by the rotation of both shafts. A plurality of eccentric weights arranged opposite to the two rotation shafts are arranged along an axis, and the plurality of eccentric weights arranged on either one of the two rotation shafts are arranged around an axis perpendicular to the rotation axis. And a plurality of eccentric weights rotatably supported, and an eccentric weight rotating means for rotating the eccentric weights. (See Japanese Utility Model Laid-Open No. 4-1208). The eccentric weight rotating mechanism changes the relative phase position between the eccentric weights, and the horizontal reaction force from the compression surface on one side acts in the opposite direction, around the center of the vibrator. Generate a rotational moment. Therefore, a turning force is given to the pressure plate, and the body is turned in a desired direction.
[0003]
[Problems to be solved by the invention]
The former single-shaft-vibration method, which uses the maneuvering of the former steering operation, turns the plate compactor, which has been increasing in size, as the operator pulls the steering handle as much as possible. It takes a lot of effort to steer the vehicle in the desired direction. For example, in the construction work to embed a pipeline, there is a problem in safety because the worker enters the groove excavated by the operator. . This is because the labor safety and health law eliminates the troublesome process of checking the safety by hitting a sheet pile so that the earth and sand do not collapse when the worker works in the groove, and as much as possible. It means that it is difficult to meet the demands of the site that you want to work without entering the groove.
[0004]
The latter exciter itself has a steering function, and the two-axis exciter type plate compactor rotates a plurality of eccentric weights arranged on one of two rotating shafts around an axis perpendicular to the rotating shaft axis. The mechanical structure to support and rotate the rotating phase to change the relative phase position between multiple eccentric weights is complex, and depending on the variation in unevenness and unevenness of the compaction surface, Since the vibration reaction force to be applied is different, it may be difficult to perform accurate steering control, and this tendency is present particularly in the land.
[0005]
The present invention solves the problems of such a conventional compacting machine and allows the aircraft itself to be equipped with a steering function so that the aircraft can be steered by an operation command from an operator holding the handle. Of course, an object is to provide a compacting machine that can be performed by remote control via wire or wireless.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, as a first aspect of the present invention, a compacting machine is provided by rotating an eccentric shaft to at least one of the two opposingly pressed platen plates in a plurality of consecutively pressed platen plates. A vibrator for moving the main body forward or backward is mounted on at least one of the plurality of confined pressure plates, and a drive source for rotating the eccentric shaft of the vibrator is mounted and opposed to the vibrator. A compacting machine having a steering function in which the mutual compression plates are connected by a center pin, and a steering cylinder is installed on one of the opposing mutual compression plates and the piston rod of the steering cylinder is pivotally supported on the other. Configured.
[0007]
And as 2nd invention, the exciter which has an eccentric shaft is mounted in both of the opposing pressure plates, respectively, and each exciter hydraulic motor which rotates the eccentric shaft of the said exciter is rotated with a hydraulic pump. A compacting machine having a steering function, which was driven and provided with a forward / reverse switching valve in its hydraulic circuit, was constructed. Furthermore, as a third aspect of the invention, a compacting machine having a steering function is provided, in which each of the exciter drive control valves is provided in a closed circuit connecting the hydraulic pump and both the exciter hydraulic motors. Next, as a fourth invention, a compacting machine having a steering function is provided in which a steering control valve is provided in a hydraulic circuit for operating a steering cylinder. Further, as a fifth invention, the forward / reverse switching valve and the exciter drive control valve are provided on the machine body side, and the forward / reverse switching valve and the exciter drive control valve are provided with a signal from the transmission side. A compacting machine having a steering function controlled by the above was constructed. Subsequently, as a sixth aspect of the invention, a compacting machine having a steering function in which a steering control valve is provided on the compacting machine main body side and this steering control valve is controlled by a signal from the transmission side is configured.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a plate compactor as an example of a compacting machine having a steering function according to the present invention, and FIG. 2 is a plan view of FIG. 1 and 2, the compacting machine main body 10 includes a first compaction plate 1 located on the front side and a second compaction plate 2 located on the rear side.
[0009]
The front side first pressure plate 1 has a vibration-generating hydraulic motor 12 positioned on the front side of the first pressure plate 1 on a reverse concave mounting plate 1a welded to the inner surface. The sprinkler 11 is also positioned substantially from the center to the rear side, and a water spray tank 14 is fixedly installed.
[0010]
The rear side second pressure plate 2 has a vibration-generating hydraulic motor 22 positioned on the rear side of the second pressure plate 2 on an inverted concave mounting plate 2a welded to the inner surface thereof. The vibrator 21 is positioned substantially in the center, and an engine E as a drive source, and a variable displacement hydraulic pump P ₁ and a charge pump P ₂ directly connected to the engine E are fixedly installed integrally.
[0011]
The first pressure plate 1 and the second pressure plate 2 are connected to each other by a center pin 5 through the brackets 3 and 4 formed on opposite sides, and can be rotated around the center pin 5 as an axis. It is configured. Further, the bracket is raised so as to be positioned near the side end portion of the second pressure plate 2 to pivotally support the end portion of the steering hydraulic cylinder 7 as the steering cylinder, and the piston rod 7a of the steering hydraulic cylinder 7 is supported. Is pivotally supported by a bracket that rises toward the side end of the first pressure plate 1.
[0012]
A swash plate type variable displacement hydraulic pump P ₁ directly connected to the engine E is an exciter that drives an eccentric shaft 11a of an exciter 11 fixedly installed on the first compression plate 1 via oil passages 8 and 8a. It is connected to the hydraulic motor for vibration 12 and to the hydraulic motor for vibration 22 for driving the eccentric shaft 21a of the vibration generator 21 fixedly installed on the second compression plate 2 via the oil passages 8 and 8b. The charge pump P ₂ is connected to a steering hydraulic cylinder 7 installed on the first pressure plate 1 through an oil passage 9.
A handle 24 is attached to the rear part of the second pressing plate 2 that is held by an operator when the pressing operation is performed manually.
[0013]
FIG. 3 is a hydraulic circuit diagram for sending the pressure oil from the variable displacement hydraulic pump P ₁ to the exciting hydraulic motors 12 and 22 and for sending the pressure oil from the charge pump P ₂ to the steering hydraulic cylinder 7. .
The variable displacement hydraulic pump P ₁ and the vibration exciting hydraulic motors 12 and 22 are configured as an integrated closed circuit, and are connected to the assembly of the variable displacement hydraulic pump P ₁ (hereinafter referred to as “electromagnetic switch”). "Valve".) Sol.1 and Sol.2 perform forward / reverse switching of the compacting machine body. Specifically, the flow of pressure oil in the hydraulic pump is switched by switching the angle of the swash plate of the variable displacement hydraulic pump P ₁ by switching between the solenoid valves Sol.1 and Sol.2.
[0014]
The pressure oil discharged from the variable displacement hydraulic pump P ₁ is, after rotating the hydraulic motor 12 and 22 for excitation and returns to the variable displacement hydraulic pump P _1. In this embodiment, the charge pump P ₂ , the check valves 31 and 32, the high pressure relief valves 33 and 34, the charge relief valve 35, the tank 36, and the two-dot chain line in the figure including the solenoid valves Sol.1 and Sol.2 are enclosed. This circuit constitutes a pump-integrated circuit built in the variable displacement hydraulic pump P ₁ , and the charge pump P ₂ feeds oil through the check valves 31 and 32, and replenishes the low flow rate to the low pressure side. doing. Both the OFF solenoid valve Sol.1 and Sol.2, swash plate of the variable displacement hydraulic pump P ₁ becomes the neutral position, do not eject oil.
[0015]
Pressure oil from the variable displacement hydraulic pump P ₁ is supplied to one hydraulic pressure via a vibration control valve (hereinafter referred to as “electromagnetic valve”) Sol. 3 provided in one hydraulic circuit (8a). It is sent to the vibration hydraulic motor 12, and is also sent to the other vibration hydraulic motor 22 via the electromagnetic valve Sol.4 provided in the other hydraulic circuit (8b). Now, if the solenoid valve Sol.1 is turned on, the solenoid valve Sol.4 is turned off, and the solenoid valve Sol.3 is turned on, the oil does not flow to the rear vibration hydraulic motor 22, It flows only to the front exciter hydraulic motor 12 and rotates the eccentric shaft 11a of the exciter 11 in FIG. 1 in the counterclockwise direction (direction of arrow a) to mainly vibrate the front first pressure plate 1. Then, the compacting machine body is advanced toward the left in the figure. On the contrary, when the solenoid valve Sol.2 in FIG. 3 is turned on, the solenoid valve Sol.3 is turned off and the solenoid valve Sol.4 is turned on. It flows only to the rear exciter hydraulic motor 22 and does not flow, and the eccentric shaft 21a of the exciter 21 in FIG. 1 is rotated in the clockwise direction (arrow b direction), so that the rear second pressure plate 2 Is mainly vibrated, and the compaction machine body is moved backward toward the right side of the figure. If both the solenoid valve Sol.3 and the solenoid valve Sol.4 are turned on with either of the solenoid valves Sol.1 and Sol.2 turned on, the front and rear vibration hydraulic motors 12, 22 are turned on. Rotate in the opposite direction, and the plate compactor vibrates both the front and rear pressure plates in the travel stop state.
[0016]
On the other hand, in the state shown in FIG. 3, the pressure oil from the charge pump P ₂ is turned OFF in both the steering control solenoid valve (hereinafter referred to as “solenoid valve”) Sol.5 and Sol.6. Therefore, it is not supplied to the steering hydraulic cylinder 7, and the compacting machine main body 10 of FIG. Now, when the solenoid valve Sol.5 is turned ON, the piston rod 7a of the steering hydraulic cylinder 7 extends, and the compacting machine body 10 turns to the left. Conversely, when the solenoid valve Sol. 6 is turned ON, the piston rod 7a of the steering hydraulic cylinder 7 is retracted, and the compacting machine body 10 turns to the right.
[0017]
In the above embodiment, a case has been described in which a vibrator is mounted on both of the two pressing plates opposed to each other in the front and rear, and a drive source is provided on only one, but the vibrator is mounted only on one. Alternatively, the drive sources may be provided on both sides. Further, three or more pressing plates may be provided continuously. In this case, if the exciter and the drive source are also mounted on at least one of the opposing pressing plates, only one pressing plate is provided. It may be mounted, or may be mounted on all the pressing plates. Alternatively, a plurality of existing plate compactors may be connected in series, the mutually opposing pressure plates may be connected by a center pin, and a steering hydraulic cylinder may be disposed between the pressure plates.
Furthermore, in the above-described embodiment, an example has been described in which each of the forward / reverse switching valve, the exciter drive control valve, and the steering control valve is an electromagnetic valve. However, in some cases, the operation is performed using a push-pull cable or the like. It may be a mechanical switching valve.
[0018]
Solenoid valve Sol.1 and Sol.2 for forward / reverse switching, solenoid valve Sol.3 and Sol.4 for exciter drive control, solenoid valve Sol.5 and Sol.6 for steering control, and engine When the operator grips and operates the handle 24 (FIG. 2), the start and stop control is performed by operating an operation button or an operating rod (not shown) provided on the handle 24 and issuing a command. . On the other hand, when it is desired to work without placing the worker in the groove as much as possible, such as pipe burial work, it is performed by remote control via wire or wireless. FIG. 4 is a conceptual diagram showing an example of remote control.
[0019]
In FIG. 4, on the transmitting side (remote control side) 100 at a location remote from the work site, the worker receives signals for controlling forward / reverse movement, vibration and steering, and signals for starting and stopping the engine. Send to compaction machine body by remote control operation. The signal is received by the receiving side (compacting machine main body side) 200 via any one of wired, radio waves and infrared rays (which may be used in combination), and a predetermined signal is transmitted via a relay on the compacting machine main body side. The solenoid valve Sol. Is operated to control the forward / reverse / vibrating hydraulic pressure, the steering hydraulic cylinder, and the engine start / stop actuator.
[0020]
【The invention's effect】
As described above, according to the compacting machine having a steering function according to the present invention described above, a plurality of compaction plates are connected in series, a vibrator is provided on at least one of the opposing compaction plates, and at least one of the plurality of compaction plates. The drive source is mounted on one side, the opposing pressure plates are connected by a center pin, and the steering cylinder is arranged between the opposing pressure plates, so stability is maintained by connecting multiple units. In addition, the aircraft can be steered by extending and retracting the piston rod of the steering cylinder so that the operator can pull the steering handle like a conventional single-axis vibration plate compactor. Therefore, it is not necessary to change the direction by maneuvering, and the labor can be reduced.
In addition, control of forward / reverse, vibration hydraulic control and steering hydraulic cylinder and engine start / stop actuator are controlled by the forward / reverse and vibration control lever, steering control lever and engine start / stop switch provided on the handle. By operating, switching the forward / reverse switching valve, the exciter drive control valve and the steering control valve, or operating the engine start / stop actuator, the operation command of the operator holding the handle Can be performed. Furthermore, the above control can also be performed by remote control by sending a signal from a place away from the work site via wire, radio waves, infrared rays or the like by operating a remote control at hand of the worker. If this remote control is performed, there is no need to work in a groove excavated by an operator, for example, in a compacting operation in a pipe burial work, and it is safe.
On the other hand, in the compacting machine having a steering function according to the present invention, the conventional biaxial exciter type is configured to change the relative phase position between a plurality of eccentric weights by an eccentric weight rotating mechanism, A special mechanical structure for rotating the eccentric weight, such as a method of generating a turning moment and steering the airframe, is unnecessary, and the mechanism is simple. In addition, since the vibration reaction force applied from the compaction surface does not differ as the compaction work that tends to occur in this conventional system is advanced, for example, by simply operating the steering hydraulic cylinder even on uneven land, There is an effect that accurate steering control can be performed.
[Brief description of the drawings]
FIG. 1 is a side view of a plate compactor as an example of a compacting machine having a steering function according to the present invention.
FIG. 2 is a plan view of FIG. 1;
FIG. 3 is a hydraulic circuit diagram for operating the plate compactor shown in FIG. 1;
4 is a conceptual diagram showing an example of remote control for operating the plate compactor shown in FIG. 1. FIG.
FIG. 5 is a side cross-sectional view showing a configuration of a conventional single-axis vibration type plate compactor.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... 1st pressure plate 1a ... Mounting plate 2 ... 2nd pressure plate 2a ... Mounting plate 3, 4 ... Bracket 5 ... Center pin 7 ... Steering hydraulic cylinder 7a ... Piston rod 10 ... Compaction machine main body 11,21 ... exciters 11a, 21a ... eccentric shafts 12,22 ... exciting hydraulic motor 14 ... sprinkling tank 24 ... handle
100 ... Sending side (remote control side)
200 ... Reception side (compacting machine main unit side)
E ... Engine P ₁ ... Variable displacement hydraulic pump P ₂ ... Charge pump

Claims (6)

An exciter that advances the compacting machine body forward or backward by rotating an eccentric shaft is provided on at least one of the two opposing pressing plates of the plurality of consecutive pressing plates, A driving source for rotating the eccentric shaft of the exciter is mounted on at least one of the plurality of pressing plates, the opposing pressing plates are connected by a center pin, and the opposing pressing plates A compacting machine having a steering function, wherein a steering cylinder is installed on one side of a pressure plate and a piston rod of the steering cylinder is pivotally supported on the other side. Exciters having eccentric shafts are mounted on both opposing pressure plates, and the respective exciter hydraulic motors that rotate the eccentric shafts of the exciters are driven by hydraulic pumps. 2. A compacting machine having a steering function according to claim 1, further comprising an advance switching valve. 3. A compacting machine having a steering function according to claim 2, wherein each of the exciter drive control valves is provided in a closed circuit connecting the hydraulic pump and both the exciter hydraulic motors. 4. A compacting machine having a steering function according to claim 1, wherein a steering control valve is provided in a hydraulic circuit for operating the steering cylinder. A forward / reverse switching valve and an exciter drive control valve are provided on the compacting machine body side, and the forward / reverse switching valve and the exciter drive control valve are controlled by a signal from the transmission side. Item 5. A compacting machine having the steering function according to any one of items 4 to 6. 5. A compacting machine having a steering function according to claim 1, wherein the steering control valve is provided on the compacting machine main body side, and the steering control valve is controlled by a signal from the transmitting side. .

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