JP2504539Y2 - Road top forming mechanism of composite material leveling device for road paving and repair machinery - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road top forming mechanism of a composite material leveling device for road pavement and repair machines, and more particularly to a screed device or mix material installation for road pavement and repair machines such as asphalt finishers. The present invention relates to a crown system or a top forming mechanism of a leveling device.

[0002]

2. Description of the Related Art A road top forming mechanism, that is, a crown system, which constitutes a composite material leveling device, that is, a screed device mounted on a conventional road paving / repairing machine, installs rainwater or the like falling on the road surface on both sides or the center side of the road. It has an important function of forming a gradient in the transverse direction on the road pavement surface in order to collect the current in the existing ditch. Therefore, as an example, the work pattern up to leveling the asphalt mixture with the asphalt finisher will be described with reference to FIGS. 1 and 2. First, the mixture material 3 carried by the dump truck 1 and dropped on the hopper 2 of the finisher is sent to the rear of the finisher by the bar conveyor 4, is carried out in the left and right direction by the conveyor screw 5, and then mounted on the rear portion of the finisher. The main screed 6 and the expandable / contractible screed 7 that expands and contracts in the left-right direction are molded into a predetermined road width 8 and pavement thickness 9. Then, as shown in FIG. 3A, a screw jack called a main crown device 10 is installed in the central portion of the main screed. Then, as shown in FIG. 3B, the base plate 12 for forming the asphalt pavement surface 11 is bent straight at the center of the main screed to form a pavement surface that is always seen on a general road such that rainwater flows into the side gutters 13 on the side of the road. You can do it. Generally, the crown gradient θ% indicated by reference numeral 14 is about 0 to 3%. Further, since the recent screed device is also capable of supporting a pavement finishing shape having a special cross section as shown in FIGS. 9A to E, not only the above-mentioned main crown device but also the expandable screed can be bent with respect to the main screed. Some are equipped with an auxiliary crown device 15. Further, reference numeral 16 in FIG. 4 is a bending center pin of the telescopic screed, and reference numeral 17 is an expansion / contraction cylinder of the telescopic screed. Next, the main crown device 10 of FIG.
The structure and action will be described by taking as an example. Reference numerals 18 and 19
The parts indicated by are the left and right main screed frames,
The portions indicated by reference numerals 20 and 21 are the sleeve and the jack bolt of the screw jack portion. Then, by operating the ratchet handle or the like, the front and rear two sets of jack bolts 21 cause the sprocket 22 and the roller chain 2 to move.
The inter-pin distance L of each screed frame is expanded or contracted by rotating while interlocking via 3. And
The portion indicated by reference numeral 25 is a bearing case. In particular,
On a general road, the set crown amount θ% changes depending on the road structure, and it is necessary to form or set a very complicated crown at the intersection of the curved road and the straight road. During the paving work, the operator has to read the crown amount with a mechanically installed gauge and set and correct the crown amount of the screed base plate in addition to other complicated work, so that the operator needs more complicated operation. It becomes. The structure of the auxiliary crown device is substantially the same as the structure of the main crown device. In conventional road pavement or repair,
Not only in the general case, but especially when it is necessary to form or set a very complicated crown, at such time, the paving operator reads the crown amount and sets the crown amount to the set value. A complicated operation was required to make corrections, and the parties concerned were struggling with the measures. For example, a screed drive device of a leveling machine for an asphalt mixture described in Japanese Utility Model Laid-Open No. 4-61111 is an example. The specific configuration will be described. The elastic member 33 including the screw shaft 32 is expanded / contracted, and a rotation amount measuring unit 43 for mechanically reading the expansion / contraction amount of the expansion / contraction member 33 is provided and read by the rotation amount measuring unit 43. A bending amount display means for converting and displaying a bending amount of the screed driving device of the asphalt mixture leveling machine based on the change amount of the stretchable member 33. It is a screed drive.

[0003]

Therefore, as described above, the rotation amount measuring means 43 having a very complicated structure and mechanically reading the expansion and contraction amount of the expansion and contraction member 33 by making direct contact is provided. And a bending amount display means for converting and displaying the bending amount of the screed driving device of the asphalt mixture laying machine from the amount of change of the elastic member 33 read by the rotation amount measuring means 43. Like the screed driving device of the asphalt mixture laying machine, the amount of rotation is measured from the crown adjusting spindle through the transmission mechanism and the distance between the left and right screed pins is converted. To improve accuracy by eliminating
The first subject of the present invention. In addition, the actual Kaihei 4-6111
In the screed drive device of the asphalt mixture laying machine described in Japanese Patent No. 1 publication, if the spindle screw pitch, the rotation ratio of the transmission mechanism, etc. change, the conversion value needs to be changed. The second task is to eliminate such troublesome problems. Further, in the screed drive device of the leveling machine for asphalt mixture disclosed in Japanese Utility Model Laid-Open No. 4-61111, the measuring means portion is exposed to the outside, but the exposed portion is exposed to the outside. In particular, the present invention is designed to prevent the measuring means from being exposed to the outside and to reduce the influence of external forces and vibrations so that the measuring means can reliably measure and the crown amount can be read quickly and reliably. And the third issue of.

[0004]

SUMMARY OF THE INVENTION The present invention provides a crown device having a crown adjusting rod having a non-contact type stroke sensor for measuring a distance between pins therein, and an output of a stroke sensor provided in the crown device. A roadtop forming mechanism of a road mix and leveling device for road pavement and repair machines equipped with a signal converter for converting a signal into a real scale of crown amount and a crown amount measuring device having an indicator for displaying the signal.

[0005]

According to the present invention, the crown device having a crown adjusting rod having a non-contact type stroke sensor for measuring the distance between pins therein and the output signal of the stroke sensor provided in the crown device are used as the crown amount real scale. Since it is a road top forming mechanism of a road mix and leveling device for road pavement and repair machines equipped with a signal converter for converting to and a crown amount measuring device having an indicator for displaying it,
Since dust and oil / water do not enter the sensor, the influence of external force is eliminated, and the vibration resistance is also excellent due to non-contact measurement, so long life and high reliability can be expected.

[0006]

[First Embodiment] The present invention describes a road top forming mechanism of a composite material leveling device for a road paving and repairing machine according to the drawings. A main screed 6 is mounted on a rear portion of a finisher, and the main screed 6 is expanded and contracted in the left and right directions. A main crown device 10 having a retractable screed 7 and a screw jack is provided in the center of the main screed 6 so that the main crown device 10 is further equipped with an auxiliary crown device 15. The extension screed can be bent with respect to the main screed, and the bending center pin 16 of the extension screed and the expansion / contraction cylinder 17 of the extension screed are provided. Next, the crown amount detecting sensor according to the present invention, which is a main part of the road top forming mechanism of the composite material leveling device of the road paving and repairing machine of the present invention, will be described. The crown amount detecting sensor is characterized in that a stroke detecting sensor is installed inside a conventional crown setting adjusting rod. The specific structure thereof will be described with reference to FIGS. 7 and 8. Reference numeral 26 is a non-contact stroke sensor, and the probe 27 having a function of converting the relative position of the probe 27 and the sleeve 20 into an electric signal is fixed to the sensor support 29 of the adjusting rod 28 and is a connector installed outside the sensor support. An electric signal is transmitted by relaying 30. The sleeve is inserted into the shaft 31 so that the probe does not come off the sleeve within the measurement range. The other structure of the adjusting rod is the same as that of the prior art. An electric signal corresponding to the crown amount is obtained from the sensor and the crown amount is displayed. Used for control. Therefore, although it is a means for displaying, the electric signal output from the sensor by the signal converter 32 and the display 33 is converted into an actual scale (%) and displayed. For the non-contact stroke sensor, for example, a known sleeve sensor, magnetostrictive sensor, differential transformer or the like is used, and a fluorescent display is provided in the display unit,
Liquid crystal, LED, etc. are used. Furthermore, the features of the present invention will be described in detail. The pin-center distance L of the adjusting rod is measured by a non-contact stroke sensor installed inside the adjusting rod. The crown amount and the distance L have a one-to-one correspondence, and the conversion formula is as follows. (See Figure 6) The value converted by the above equation by the height signal converter from the lower surface of the lead to the adjusting rod is digitally or analogically displayed on the display.

[0007]

[Effect] Next, the effect of the present invention will be described. The present invention is provided in a crown device having a crown adjusting rod having a non-contact stroke sensor for measuring the distance between pins therein and the crown device. Signal converter that converts the output signal of the stroke sensor to the actual scale of crown amount, and the road level forming of the mix leveling device for road pavement and repair machines equipped with a crown amount measuring device that has a display for displaying it Since it is a mechanism, the amount of crown is automatically measured by a sensor, so the accuracy is greatly improved compared to the conventional technology that relied on visual measurement by a scale plate, and at the same time the measured value is displayed, making it easy for the operator to see the display. Since it can be easily installed at a position, the management of the crown amount can be facilitated and the work amount of the operator can be reduced. Furthermore, since the sensor is housed inside the adjusting rod, it is completely protected from adverse environments such as dust and oil and water, and unexpected external forces. There is an effect that reliability is expected. Also, if an actuator such as a hydraulic motor is installed instead of the ratchet handle for operating the crown device, one-touch operation can be performed by an electric signal from the sensor, reducing the amount of work and automatic control according to the amount of crown on the planned pavement surface. There is an effect.

[Brief description of drawings]

FIG. 1 is a diagram showing a work pattern by a road top forming mechanism device of a composite material leveling device of a road pavement and repair machine according to the present invention.

FIG. 2 is a plan view of a road top forming mechanism device of a composite material leveling device of the road paving and repairing machine to which the present invention of FIG. 1 is applied.

FIG. 3A is an operation state diagram of the main crown device.

FIG. 3B is a vertical cross-sectional view showing the asphalt pavement surface and gutter formed by the operation of FIG. 3A of the main crown device.

FIG. 4 is a view showing an operating state of a combined body of a crown device in which a main crown device is equipped with an auxiliary crown device.

FIG. 5 is a perspective view of a main crown device.

FIG. 6 is a diagram of a main crown device showing a relationship between a crown amount θ, a pin center distance L of an adjusting rod, and a height from a lower surface of the screed to the adjusting rod.

FIG. 7 is a diagram showing a transmission path of a signal according to the crown amount measurement of the present invention of FIG. 1;

FIG. 8 is a state in which a means for measuring the distance L between the pin centers of the adjusting rods of the road top forming mechanism of the road leveling device of the road paving and repairing machine to which the present invention is applied, that is, a stroke detection sensor is installed. It is the figure which showed.

FIG. 9A is a diagram showing an arrangement state of screed frames for making a road surface a desired crown amount.

FIG. 9B is a diagram showing a disposition state of the screed frame at the time of a regular crown.

FIG. 9C is a view showing a disposition state of the screed frame when the shoulder is rubbed.

FIG. 9D is a diagram showing an arrangement state of a screed frame in the case of a 3-point regular crown.

FIG. 9E is a diagram showing an arrangement state of screed frames at the time of rut digging.

[Explanation of symbols]

1 Dump truck 2 Finisher hopper 3 Compound material 4 Bar conveyor 5 Conveyor screw 6 Main screed 7 Telescopic screed 8 Road width 9 Pavement thickness 10 Main crown device 11 Asphalt pavement surface 12 Base plate 13 Gutter 14 Crown slope 15 Auxiliary screed device 16 Center pin for bending 17 Expansion / contraction cylinder for expansion / contraction screed 18 Main screed frame 19 Main screed frame 20 Sleeve 21 Jack bolt 22 Sprocket 23 Roller chain 24 Bearing support device 25 Bearing case 26 Non-contact stroke sensor 27 Probe 28 Adjusting rod 29 Sensor support 30 connector 31 shaft 32 signal converter 33 indicator

Claims (1)

(57) [Scope of utility model registration request] 1. A non-contact type space for measuring the distance between pins inside thereof.
Crown Adjusting stroke with built-in trowel sensor
A crown device having a head and a crown device
The output signal of the stroke sensor
Has a signal converter that converts
Road pavement forming mechanism for road mix and leveling equipment for road paving and repair machines equipped with a crown amount measuring device .