JPH0772409B2 - Road cutting mixer - Google Patents

Description

Description: “Industrial field of application” The present invention relates to an on-road cutting mixer used when a paved road surface is repaired by a road surface reclaiming method, and relates to an admixture material for controlling the supply amount of an admixture material. The present invention relates to a supply amount control device.

“Conventional technology” Conventionally, when repairing an existing asphalt pavement road surface by the road surface layer regeneration method, a road cutting mixer is used, but this road cutting mixer cuts the pavement surface and scrapes it. Device (rotary scalifier),
A hopper device that accepts new mix materials that have been input from a dump truck, a feeder device that conveys a predetermined amount of scraped material that has been disentangled by a cutter device and a new mix material in the hopper device, and a feeder device that conveys the material. Mixer device that mixes the scraped loosening material with the new mixture material, a sprinkling device that evenly sends the mixed material mixed by the mixer device onto the road surface, and a leveling material that spreads and mixes the mixed material spread on the road surface. It is configured to be mounted on a self-propelled vehicle with the device.

"Problems to be Solved by the Invention" By the way, in the above-described conventional road cutting mixer,
By manually adjusting the transport amount (transport speed) per unit time of the feeder device, the supply amount of the new mixture material supplied to the mixer device was adjusted,
The operator must constantly monitor the supply state of the new mixture to the mixer device by visual inspection and manually adjust the feeding amount of the feeder device, which requires skill in operation and a great amount of work labor. There was a problem that it would end up. Also,
If the operator's skill level is low and the amount of new mixture supplied to the mixer device is not appropriate, the amount of the mixed material that is mixed by the mixer device and sent to the road surface by the sprinkling device is constant. As a result, there is also a problem that the flatness of the road surface is impaired and the quality of the road deteriorates.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a mixture material supply amount control device for a road cutting mixer that can always maintain an appropriate amount of the mixture material sent out on a road surface. Has an aim.

"Means for Solving the Problem" The invention is to extract a scraping material that is scraped by a cutter and push out a part of the scraping material to the side of the vehicle, and scoop up the scraping material that has not been pushed away by the extracting device. The feeder device for the old mixture material to be conveyed, the feeder device for the new mixture material which can convey the new mixture material and can set the conveying amount of the new mixture material arbitrarily, and the scraping and unwinding device supplied by the feeder device for the old mixture material. A road cutting mixer having a mixer device that mixes wood and a new mix supplied by a new mix feeder device, and a spreader that spreads and mixes the mix mixed by the mixer device on the road surface. And a staying amount detecting means for detecting a staying amount of the mixed material staying in front of the spreading and leveling device, and a new mixture material and a scraper to be fed to the mixer device. Based on the detection results of the first and second measuring means for respectively measuring the supply amount of the material and the staying amount detecting means, the preset amount of mixed material production per unit time is corrected, and this correction is performed. Based on the mixed material production amount and the supply amount of the scraping and disintegrating material measured by the second measuring means, the required new composite material supply amount is calculated, and the calculation result and the first
Control means for controlling the carry amount of the new composite material feeder device based on the supply amount of the new composite material measured by the measuring means.

"Operation" In the present invention, (1) the amount of the mixed material staying in front of the spreader,
And the feed amount of the new mix material feeder that conveys the new mix material is controlled according to the supply amount of the scraped and loosened material supplied to the mixer device, and the supply amount of the new mix material supplied to the mixer device is adjusted. Therefore, the mixture material is supplied to the spreading and leveling device without excess or deficiency, and the supply amount of the new mixture material is adjusted according to the retention amount of the mixture material and the supply amount of the scraping material. As a result, it is possible to always keep the ratio of the scraped-out material and the new mixture material appropriately, and to form a road of constant quality.

That is, in the present invention, the supply of a new mixture material to be added to the scraping and disintegrating material according to the staying amount of the mixed material staying in front of the spreader and the supply amount of the scraping and disintegrating material supplied to the mixer device. The amount can be adjusted automatically, and as a result, the operator does not need any skillful operation technology to constantly monitor the supply state of the new mix material and adjust the transfer speed of the feeder device for the new mix material. Therefore, it is possible to obtain an effect that the work labor is significantly reduced.

(2) The old compound material feeder device does not put all of the scraped material unraveled by the cutter into the mixer device, but pushes out a part of the scraped material to the side of the vehicle by the extracting device. Therefore, by adjusting the extraction device like this, it is possible to easily adjust the ratio of the scraping material in the mixed material to an appropriate value, and also in this respect, the quality of the road can be kept constant. The effect that can be obtained is obtained.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

First, the configuration of the road cutting mixer will be described with reference to FIG. In FIG. 2, 1 is a leading self-propelled vehicle, 2 is a succeeding self-propelled vehicle, and these two self-propelled vehicles
As shown in the figure, 1 and 2 are arranged in the vertical direction during the paving road surface repair work, and always travel at a low speed in the direction of arrow F (forward) with a certain distance, and also in the case of a transport trailer, etc. When traveling from the work site to the work site or when returning from the work site to the transport trailer, each of them travels independently.

A hopper device 3 for receiving a new mixture fed by a dump truck or the like is provided in the front part of the preceding self-propelled vehicle 1. The hopper device 3 is mounted on the left and right so as to open and close upward. It is composed of a pair of wings 4, 4 and a hydraulic drive mechanism for adjusting the opening and closing angles of the wings 4, 4.

A feeder device 5 that extends obliquely rearward and upward from below the hopper device 3 is provided in the center of the vehicle 1 in the width direction. With this feeder device 5, the new mixture material fed into the hopper device 3 is rearward. To be transported to.
The feeder device 5 is configured to drive a transport chain by a hydraulic motor 5a (see FIG. 1) described later. By increasing or decreasing the flow rate of the hydraulic oil supplied to the hydraulic motor 5a, a new mixture material is obtained. The carrying amount of can be set arbitrarily within a fixed range.

A pair of left and right front wheels 6, 6 are attached to a vehicle frame below the hopper device 3 so as to be rotatable and rotatable in a horizontal plane. These front wheels 6, 6 are provided in a driver's seat. The direction is changed by the hydraulic drive mechanism that operates according to the rotation operation of the handle 7, and the traveling direction is changed accordingly.

A heating device 8 for preheating an existing asphalt pavement road surface is movably supported on the vehicle frame behind the front wheels 6 and 6, and the heating device 8 is moved up and down by a hydraulic cylinder 9. There is.

On the vehicle frame behind the heating device 8, a cutter device 10 for cutting and scraping the asphalt pavement road surface preheated by the heating device 8 is provided. The cutter device 10 includes a pair of telescopic cutters 11 and 11 which are movable in the width direction of the self-propelled vehicle 1 so that the scraping width can be changed.
And a fixed cutter 12 provided behind these telescopic cutters 11 and 11, and the telescopic cutters 11 and 11 and the fixed cutter 12 are respectively rotated by a support member 13 provided on the vehicle frame so as to be vertically movable. It is supported freely. The support member 13 is moved up and down by a hydraulic cylinder 16 so that the raking depth can be adjusted. The expandable cutters 11 and 11 are formed by fixing a large number of bits on the peripheral surface of a cylindrical rotary drum, and are driven to rotate by a motor directly connected to the rotary shaft of the rotary drum. Similarly, the fixed cutter 12 is
A large number of bits are fixed on the peripheral surface of a cylindrical rotating drum, and the motor is directly connected to the rotating shaft of the rotating drum so that it can be driven to rotate in the opposite direction to the telescopic cutters 11, 11. There is.

A pair of left and right drive wheels 14, 14 are rotatably provided on the vehicle frame behind the cutter device 10, and these drive wheels 14, 14 are rotationally driven by a hydraulic motor (not shown) and a rear wheel drive mechanism. It has become so.

Further, at the rear part of the self-propelled vehicle 1, a transfer feeder device 18 for delivering the new mixture material conveyed by the feeder device 5 to the succeeding self-propelled vehicle 2 is provided. This transfer feeder device 18 is capable of adjusting the height of the discharge portion 18a at the rear end by a hydraulic cylinder 19, and the discharge portion 18a of the transfer feeder device 18 follows when paving the road surface. It is located above the input chute 20 of the vehicle 2.

On the other hand, at the front end of the following self-propelled vehicle 2, a pickup device 21 for pushing the scraped and loosened material scraped by the cutter device 10 of the preceding self-propelled vehicle 1 to the side of the road surface, and a pickup for scooping up the scraped and loosened material. A feeder 22 is provided.

The scraped and loosened material scooped up by the pickup feeder 22 is conveyed in the casing 23 obliquely rearward and upward, and is discharged from an opening formed at the rear end of the casing 23.

Behind the pickup feeder 22, the scraping and loosening material discharged from the opening of the casing 23 is conveyed obliquely upward and rearward, and the weight of the scraping and loosening material being transported (= transported amount or supplied amount) is measured. A weighing feeder device 24 is provided. The weighing feeder device 24 has a front end portion 24a vertically rotatably attached to a vehicle frame, and a rear end portion 24b supported by a weighing mechanism 25 having a weighing load cell 25a (see FIG. 1). There is. Above the weighing feeder device 24, the new mixture material discharged from the transfer feeder device 18 is conveyed obliquely rearward and upward, and the weight of the new mixture material being conveyed (= conveyance amount or supply amount) is measured. A weighing feeder device 26 is provided.
Similar to the weighing feeder device 24, the weighing feeder device 26 has a front end portion 26a vertically rotatably attached to a vehicle frame and a rear end portion 26b having a weighing load cell 27a.
It is supported via a weighing mechanism 27 (see FIG. 1).

Then, the scraped and loosened material and the new mixture material respectively conveyed by the weighing feeder devices 24 and 26 are put into a mixer device 28 provided behind the respective weighing feeder devices 24 and 26. This mixer device 28 is called a two-axis pug mill continuous mixer, and is formed by radially projecting a plurality of paddles on two rotary shafts provided in a casing and extending in the vehicle front-rear direction. By rotationally driving the rotary shaft of the book, the scraping material fed into the feeding chute 29 and the new mixture are mixed by the paddle, and then the mixed material is discharged from the discharge port formed at the rear part of the casing. It has become.

Behind the mixer device 28, there is provided a sprinkling device 30 for sending the mixed material discharged from the discharge port of the casing of the mixer device 28 to the road surface. This sprinkling device 30,
A screw that extends in the vehicle width direction and is rotatable is supported by a body frame so that it can be raised and lowered. By rotating this screw, the mixed material is transferred in the vehicle width direction and is evenly distributed on the road surface. It is designed to be sent to.

Behind the spreading device 30, a spreading and leveling device 31 for spreading and stiffening the mixed material sprinkled on the road surface is provided.

A pair of left and right drive wheels 34, 34 are rotatably provided on the vehicle frame in front of the scraping device 30, and these drive wheels 34, 34 are rotated by a hydraulic motor and a rear wheel drive mechanism (not shown). Further, a pair of left and right front wheels 36, 36 are attached to the vehicle frame behind the pickup feeder 22 so as to be rotatable and rotatable in a horizontal plane. The directions of the wheels 36, 36 are changed by a hydraulic drive mechanism that operates in response to a rotating operation of a steering wheel 37 provided in the driver's seat.

Next, with reference to FIG. 1, the configuration of the mixture material supply amount control device of the above-described road cutting mixer will be described. In FIG. 1, reference numeral 40 is a diesel engine mounted on the preceding self-propelled vehicle 1, and a hydraulic pump 42 is driven by the diesel engine 40. The hydraulic oil discharged from the hydraulic pump 42 is guided to the electromagnetic proportional control valve 44 by the pressure pipe 43, the flow rate is adjusted by the electromagnetic proportional control valve 44, and then the conveying chain of the feeder device 5 is driven by the pressure pipe 45. Is guided to the hydraulic motor 5a.
Also, the hydraulic oil discharged from the hydraulic motor 5a is returned to the return pipe.
After being guided to the solenoid proportional control valve 44 by 47, the return pipe 48
The hydraulic oil is returned to the hydraulic oil tank 49 by the hydraulic oil tank 49, and the hydraulic oil stored in the hydraulic oil tank 49 is guided to the hydraulic pump 42 by the suction pipe 50. The electromagnetic proportional control valve 44 controls the flow rate of the hydraulic oil by moving the poppet or spool by an electromagnet, and has a property that the electromagnetic force is substantially proportional to the magnitude of the exciting current supplied to the coil of the electromagnet. We are using. That is, within a certain range, the larger the exciting current supplied to the electromagnetic proportional control valve 44, the larger the flow rate of the hydraulic oil passing through. Reference numeral 56 denotes a preceding vehicle controller that controls each part of the preceding vehicle 1, and includes a CPU (central processing unit) that performs various calculations, a ROM (read only memory) that stores programs used in the CPU, and data. R for temporary holding
Mainly composed of a microcomputer consisting of AM (random access memory) and an I / O (input / output) interface for exchanging various data. In addition, the following self-propelled vehicle 2 and various data are connected via a communication cable 58. Serial transmission circuit for transmission, D / A (digital / analog) converter that converts the current command value (digital signal) E transmitted from the following self-propelled vehicle 2 to an analog signal and supplies it to the proportional valve amplifier 59. Etc. are provided.

Both ends of the communication cable 58 can be easily attached and detached by means of connectors, and are connected during paving road surface repair work and detached during forwarding. Further, the proportional valve amplifier 59 supplies an exciting current corresponding to the current command value (voltage signal) E output from the controller 56 to the electromagnetic proportional control valve 44.

On the other hand, reference numeral 60 denotes a composite material production amount setting device for setting the composite material production amount Q ₀ [ton / m] per road surface repair distance 1 [m], which is constituted by a digital switch, and is provided to the following self-propelled vehicle 2 It is provided on the operation panel of the driver's seat. The mixed material production amount Q0 is appropriately set in consideration of the spread width and spread thickness of the mixed material, the material specific weight of the mixed material, and the like. 65 is an incremental type rotary encoder,
The pulse signal is output at time intervals according to the rotation speed of the.
This pulse signal is supplied to the following vehicle controller 66, which will be described later, and the speed detection counter in the controller 66 counts the number of pulses supplied within a certain period of time. The traveling speed of the self-propelled vehicle 2 is detected. Further, 67 is a staying amount sensor for detecting the staying amount of the mixed material staying in front of the spreading and leveling device 31, which emits ultrasonic waves of a specific frequency downward, and then the sprinkling device 30
The height of the staying mixed material is detected based on the ultrasonic wave propagation time until it is reflected and returned by the staying mixed material above, and the amount H of the mixed material corresponding to this height is detected. Supply to the controller 66.

The following vehicle controller 66 controls each part of the following vehicle 2, and, like the preceding vehicle controller 56 described above, has a CPU.
Mainly composed of a microcomputer composed of a ROM, a RAM, an I / O interface, and counting the pulse signals supplied from the rotary encoder 65, and counting data according to the traveling speed of the vehicle 2. , A speed detection counter, a serial transmission circuit for transmitting various data to the preceding vehicle 1 via the communication cable 58, and a weighing signal (analog signal) of the scraping material supplied from the weighing load cell 25a. , And an A / D converter that converts the weighing signal (analog signal) of the new mixture supplied from the weighing load cell 27a into a digital signal.

The operation of the composite material supply amount control device of the road cutting mixer configured as described above will be described with reference to FIG.

First, in step SP1 shown in FIG. 3, the CPU in the following vehicle controller 66 causes the mix material production amount Q ₀ [to] per road surface repair distance 1 [m] set in the mix material production amount setter 60.
[n / m] is taken in, and in the next step SP2, the count data of the speed detection counter is taken in as the traveling speed V [m / min.]. Then, in the next step SP3, the mixture material production amount Q ₁ [ton / h] per hour is calculated from the following equation (1).

Q ₁ = Q ₀ · V · 60 (1) Next, in step SP4, after taking in the mixture material retention amount H supplied from the retention amount sensor 67, the next step SP5
At, the correction coefficient A is determined according to the mixture material retention amount H. That is, the correction coefficient A = 2.0, 1.5, 1.0, 0.5, 0 depending on the five levels of the staying amount of the mixed material staying in front of the spreader 31 To do. Then, in the next step SP6, the composite material production amount Q ₁ is multiplied by the correction coefficient A, and the multiplication result Q ₁ ′ is taken as the corrected composite material production amount. Next, in step SP7, the weighing feeder 2
Measured value Qr of scraping and loosening material supplied from the load cell 25a for measuring 4 and converted into digital signal by A / D converter
In step SP8, a new mixture material supply amount Qv [ton / h] currently required is calculated from the following equation (2).

Qv = Q ₁ ′ −Qr (2) Then, in the next step SP9, the actual new mixture material measured value Qv ′ measured by the load cell 27a for weighing of the weighing feeder 26 is fetched, and in the next step SP10. , The actual new mix weight Qv ′ and the previous step SP8
The current command value E is determined so as to reduce the difference from the new mixed material supply amount Qv calculated in. In this case, the preceding vehicle 1
The relationship between the conveying speed of the feeder device 5 for conveying the new mixture and the new mixture supply amount Qv is as shown in FIG. 4, and the conveying speed of the feeder device 5 and the proportional valve amplifier are as follows.
The relationship with the current command value E supplied to 59 is as shown in FIG. 5, and the current command value E is determined based on these relationships.

The current command value E determined in step SP10 is
In the next step SP11, it is transmitted to the preceding vehicle controller 56 via the communication cable 58.

The preceding vehicle controller 56 converts the current command value E transmitted from the following vehicle controller 66 into an analog signal (voltage signal) by the D / A converter, and then supplies the analog signal (voltage signal) to the proportional valve amplifier 59. Since the proportional valve amplifier 59 supplies the exciting current corresponding to the current command value E to the electromagnetic proportional control valve 44, the flow rate of the hydraulic oil supplied to the hydraulic motor 5a via the electromagnetic proportional control valve 44 is the current command. The value is adjusted according to the value E. As a result, the carry amount of the new mixture carried by the feeder device 5 from the inside of the hopper device 3 is equal to the following vehicle controller.
In order to reach the new mixed material supply amount Qv calculated by 66,
The carry amount of the feeder device 5 is adjusted.

In this way, based on the staying amount of the mixed material detected by the staying amount sensor 67 and the supply amount of the scraping and loosening material detected by the measuring load cell 25a, the new mixture material supply amount to be supplied to the mixer device 28. Since the Qv is calculated and the feeding amount of the feeder device 5 for feeding the new mixture is controlled on the basis of this calculation result, the scraping material is removed depending on the stagnation condition of the mixed material on the spreading device 30. The amount of new mixture to be added is automatically adjusted.

[Advantages of the Invention] As described in detail above, in the road cutting mixer according to the present invention, (1) the amount of the mixed material staying in front of the spreader,
And the feed amount of the new mix material feeder that conveys the new mix material is controlled according to the supply amount of the scraped and loosened material supplied to the mixer device, and the supply amount of the new mix material supplied to the mixer device is adjusted. Therefore, the mixture material is supplied to the spreading and leveling device without excess or deficiency, and the supply amount of the new mixture material is adjusted according to the retention amount of the mixture material and the supply amount of the scraping material. As a result, it is possible to always keep the ratio of the scraped-out material and the new mixture material appropriately, and to form a road of constant quality.

That is, in the present invention, the supply of a new mixture material to be added to the scraping and disintegrating material according to the staying amount of the mixed material staying in front of the spreader and the supply amount of the scraping and disintegrating material supplied to the mixer device. The amount can be adjusted automatically, and as a result, the operator does not need any skillful operation technology to constantly monitor the supply state of the new mix material and adjust the transfer speed of the feeder device for the new mix material. Therefore, it is possible to obtain an effect that the work labor is significantly reduced.

(2) The old compound material feeder device does not put all of the scraped material unraveled by the cutter into the mixer device, but pushes out a part of the scraped material to the side of the vehicle by the extracting device. Therefore, by adjusting the extraction device like this, it is possible to easily adjust the ratio of the scraping material in the mixed material to an appropriate value, and also in this respect, the quality of the road can be kept constant. The effect that can be obtained is obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an electric and hydraulic circuit of a mixed material supply amount control device for a road cutting mixer according to an embodiment of the present invention, and FIG. 2 is a side view showing a configuration of the road cutting mixer. FIG. 3 is a flow chart for explaining the operation of one embodiment of the present invention, and FIG. 4 is a graph showing the relationship between the conveying speed of the feeder device provided in the on-the-road cutting mixer and the new mixture material supply amount, FIG. 5 is a graph showing the relationship between the transport speed of the feeder device and the current command value. 3 ... Hopper device, 5 ... Feeder device (feeder device for new mix material), 5a ... Hydraulic motor, 22 ... Pickup feeder (feeder device for old mix material), 24 ... Weighing feeder device, 25a ... Weighing load cell (second weighing means), 26 ... weighing feeder device, 27a ... weighing load cell (first weighing means), 28 ... mixer device, 30 ... spreading device, 31 ... laying leveler Device, 44 ... Electromagnetic proportional control valve, 56 ... Leading vehicle controller, 59 ... Proportional valve amplifier, 60 ... Mixing material production volume setter 65 ... Rotary encoder, 66 ... Subsequent vehicle controller (control means) , 67 …… Retention amount sensor (retention amount detection means).

Front Page Continuation (72) Inventor Yoshimitsu Hashimoto 1-19-11 Kyobashi, Chuo-ku, Tokyo Within Japan Tamaido Co., Ltd. (72) Inventor Ichiro Miyazaki 1-1-19-11 Kyobashi, Chuo-ku, Tokyo Japan Tamaido Shares In-house (56) References JP-A-1-278605 (JP, A)

Claims (1)

[Claims] Claim: What is claimed is: 1. An extraction device for pushing a part of the scraped material unraveled by a cutter to the side of the vehicle, and a feeder device for the old mixture material for picking up and conveying the scraped material that has not been pushed away by the extracting device. And a feeder for a new mixture, which conveys the new mixture and can arbitrarily set the conveying amount of the new mixture, a scraping material supplied by the feeder for the old mixture, and a feeder for the new mixture An on-road cutting mixer having a mixer device for mixing the new mixture supplied by the device and a spread leveling device for spreading and spreading the mixed material mixed by the mixer device on a road surface, wherein the spread leveling device Amount detecting means for detecting the amount of staying of the mixed material staying in front of, and the first for measuring the amount of each of the new mixture material and the scraping material supplied to the mixer device. And a second weighing means, and based on the detection result of the staying amount detecting means, a preset amount of mixed material production per unit time is corrected, and the corrected amount of mixed material production and the second amount The required new mixture material supply amount is calculated on the basis of the supply amount of the scraping and disintegrating material measured by the measuring means, and the calculation result and the first
And a control means for controlling the carrying amount of the new mixture feeder device based on the supply amount of the new mixture material measured by the measuring means.