JPH10185908A - Wheel tracking testing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheel tracking testing machine capable of measuring a plurality of sample substances continuously, and capable of increasing the working efficiency at the time of testing. SOLUTION: A sample 100b to be measured is automatically fed by an air cylinder 41 to a measuring table 91 from a storage shelf 42 on which a plurality of samples 100a, b,..., n are placed. Besides, a sample which has been tested 100a is automatically moved and arranged on the storage shelf 42 also by the air cylinder 41. Consequently, it becomes possible to simplify work which is used to be performed by hands, and continuous measurement becomes feasible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel tracking tester for performing a wheel tracking test.

[0002]

2. Description of the Related Art A wheel tracking tester is used for performing a wheel tracking test, and is performed on an asphalt pavement surface on a highway or the like by evaluating the consolidation and flow resistance of an asphalt mixture as a specimen. This is to estimate the rutting phenomenon.

An example of a conventional wheel tracking tester for performing such a test will be described with reference to FIGS. FIG. 8 is an overall configuration diagram showing an overall configuration of a conventional wheel tracking tester, and FIG. 9 is an external front view showing a schematic configuration of a tester main body 110 of the conventional wheel tracking tester.

[0004] As shown in FIG. 8, a wheel tracking tester is a tester main body 1 installed in a heat insulation room 130.
10 and an operation control unit 120 for mechanically controlling the tester main body 110 and the like.

[0005] As shown in FIG. 9, the tester main body 110 includes a test wheel (hereinafter, referred to as a “test wheel”) 111 that reciprocates horizontally on the test piece 100, and a test wheel 100 on the test piece 100. Detection sensor 11 for detecting the displacement of
And 2.

The specimen 100 used in this testing machine is
Asphalt mixture contained in a box made of metal. The specimen 100 is usually 30 cm square and 5 cm thick, and is cured at 60 ° C. in a constant temperature curing room separate from the heat insulation room 130 during the test.

Further, the heat insulation room 130 is provided with the tester main body 110.
By keeping the room temperature constant, the temperature of the tester main body 110 and the specimen 100 at the time of the test can be kept at a constant temperature of ± 1 ° C. The room temperature of the heat insulation room 130 is generally set to 60 ° C. (45 ° C. in a special case).

The test wheel 111 has a diameter of 20 cm and a width of 5 c.
m, a thickness of 1.5 m, and a solid tire having a JIS hardness of 78 are used. This test wheel 111 is 2 in a general test.
The specimen 100 is horizontally moved back and forth at a moving speed of one reciprocation / min.

When a test is performed by the tester having the above-described configuration, first, the test specimen 100 that has been cured in a predetermined constant-temperature curing room is set on a measuring table of the tester main body 110.
Thereafter, the test wheel 111 is moved horizontally back and forth on the specimen 100. The test wheel 111 for the specimen 100 at this time
Is determined by traffic conditions to be set and the like.

Then, the amount of deformation displacement of the specimen 100 with respect to time is detected by the displacement detection sensor 112. Generally, the amount of deformation for 15 minutes during the measurement elapsed time of 45 minutes to 60 minutes is measured.

Incidentally, in a general wheel tracking test, it is common to measure three specimens as one set under the same conditions.

[0012]

However, in the above-mentioned conventional testing machine, the operator manually mounts the test specimen 100, which has been cured in a predetermined temperature-curing room, on the measuring table of the testing machine main body 110 every time the measurement is performed. And the load on the operator is large.

When a large number of test specimens 100 are to be measured, the user must enter the heat insulation chamber 130 at predetermined intervals (each time one measurement is completed) for replacement of the test specimens 100. Not get. For this reason, the constant temperature state of the heat insulation room 130 is disturbed, and every time measurement of one specimen 100 is completed, a situation arises in which it is necessary to newly wait for the heat insulation room 130 to be kept at a constant temperature. There is a problem that it is difficult to perform 100 measurements continuously.

As described above, the conventional testing machine described above has a problem that the work efficiency at the time of testing is poor due to the large amount of manual work.

Therefore, the present invention has been made in view of the above circumstances, and a wheel tracking test machine capable of continuously measuring a large number of test specimens and improving the work efficiency at the time of test. The purpose is to provide.

[0016]

According to the present invention, there is provided a wheel tracking tester for performing a wheel tracking test on a test object arranged on a predetermined measuring table. A storage shelf for storing a plurality of specimens to be tested, and an untested specimen in the storage shelf is moved and arranged on the measurement stand, and a tested specimen is moved and arranged from the measurement stand to the storage shelf. A specimen moving mechanism, a test wheel reciprocating horizontally on the specimen moved and arranged from the storage shelf by the specimen moving mechanism, and a displacement amount of the specimen displaced by the horizontal reciprocating movement of the test wheel is detected. And a detection sensor.

According to the testing machine of the present invention, the specimen to be measured is automatically supplied to the predetermined measuring table from the storage shelf storing the plurality of specimens by the specimen moving mechanism.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is an overall configuration diagram showing the overall configuration of a wheel tracking tester according to one embodiment of the present invention.

As shown in FIG. 1, a wheel tracking test machine 1 according to the present invention includes a test machine main body 10 installed in a heat insulation room 30 and an operation control for mechanically controlling the test machine main body 10. And a unit 20.

Here, the heat insulation room 30 is for providing a constant temperature environment necessary for the test, and has the same function as the heat insulation room 130 described in the prior art.

The operation control section 20 includes various operation buttons for mechanically controlling the tester main body 10, various displays for displaying and recording measurement results, and recording devices. Further, the operation control unit 20 includes various operation buttons for controlling the room temperature of the heat insulation room 30, and thereby can control the air conditioning equipment of the heat insulation room 30.

FIG. 2 is an external front view showing the configuration of the tester main body 10, and FIGS. 3 and 4 are external side views of the tester main body 10.

As shown in FIG. 2, the tester main body 10 is composed of a traveling section 50 capable of horizontally reciprocating along a traveling rail 92 attached to a main body frame 90 and a specimen 100 to be subjected to a test. It has a schematic configuration including a specimen automatic supply unit 40 for supplying.

In the tester main body 10, the specimen 10
Numeral 0 is similar to that described in the prior art, and is an asphalt mixture put in a box frame made of metal. The specimen 100 is arranged at a predetermined position on the measuring table 91 and is subjected to a wheel tracking test.

The traveling section 50 is composed of three traveling machines (50a to 50c) connected to each other.
The three test wheels 51 which reciprocate horizontally on the surface 00, the displacement sensor 52 which detects the displacement amount of the specimen 100 displaced by the horizontal reciprocation of the test wheel 51, and the displacement sensor 52 which comes into contact with the displacement sensor 52 during measurement It has a detection auxiliary member 53 that can detect the amount of displacement of the specimen 100 and a guide rail 54 that is loosely fitted to the traveling rail 92. As described above, in the present machine, the traveling unit 50 is constituted by the traveling machines 50a to 50c provided with the three test wheels 51, so that a maximum of three specimens 100 can be tested at the same time. In the normal wheel tracking test, the test is performed with three specimens 100 as one set. Therefore, in the above description, the three specimens 100 are tested. It is also possible to test only one or two specimens 100.

The test wheels 51 are solid tires of a predetermined size, and are the same as those described in the prior art.

FIGS. 3 and 4 are external side views of the tester main body 10, and mainly show a test specimen automatic supply unit 4 of the tester main body 10.
FIG. 3 is a diagram for explaining the configuration and operation of a zero. FIG.
4 and FIG. 4, the test piece 100 placed on the measuring table 91 is shown.
The main body frame 90 is viewed in cross section so that the state and the like can be understood.

As shown in FIGS. 3 and 4, the specimen automatic supply unit 40 includes an air cylinder (specimen moving mechanism) 41 for moving the specimen 100 by horizontally moving the piston part 41a, and the above-described test. Specimens 100 to be provided to
And a supply shelf (storage shelf) 42 for storing the information.

Here, the supply shelf 42 is composed of eight columns and three columns.
It has a multi-stage storage shelf configuration of rows,
A maximum of eight specimens 100 can be stored and supplied to each of the traveling machines (50a to 50c). Therefore, the supply shelf 42 has a total of 24 rows of 8 specimens × 3 rows = 24 specimens 1
00 can be stored. However, the stage configuration of the supply shelf 42 is not limited to the above-described eight stages, but may naturally be smaller (or larger).

The three air cylinders 41 are provided in the horizontal direction corresponding to the supply shelves 42 having the three horizontal rows.
The piston portion 41a moves horizontally. Further, the tip portion 41b of the piston portion 41a emits a magnetic force, and can hold the specimen 100 by the magnetic force. With this, the air cylinder 41 holds the tested specimen 100 arranged on the measuring table 91 at the distal end 41b by magnetic force and returns it to the supply shelf 42,
For example, the untested specimen 100 at the upper level of the returned supply shelf 42 is moved and arranged on the measuring table 91.

Here, the supply shelf 42 and the air cylinder 41 operate in conjunction with each other. In FIGS. 3 and 4, the lowermost shelf is the shelf 42a and the uppermost shelf is the shelf 4a.
Assuming 2h, for example, the first thing to be used for measurement is
The specimen 100a stored on the shelf 42a, and the specimen to be measured next is the specimen 100b stored on the shelf 42b. At this time, when the test of the specimen 100a stored in the shelf 42a is completed, the air cylinder 41 operates to return the tested specimen 100a to the shelf 42a. When the specimen 100a is returned to the shelf 42a, the supply shelf 4
2 moves down one step. Then, the specimen 100b stored in the shelf 42b is moved and arranged on the measuring table 91 by the air cylinder 41. In this way, the measurement of the specimen 100 on each shelf is sequentially performed.
When the measurement of the specimen 100h for 2 hours is completed, the measurement of all the specimens 100 is completed.

FIG. 5 is a block diagram showing the configuration of a control system of the wheel tracking test machine 1 according to the present invention.

As shown in the figure, the control system of the test machine 1 has a main control unit 61 provided in the operation control unit 20 for controlling the entire test machine. A timer unit 62 that measures various times related to the test, a recording unit 63 that records the measurement results and the like of the test, a traveling drive unit 64 that causes the traveling unit 50 to travel, and various sensors such as the displacement sensor 52 The sensor unit 65, a cylinder drive unit 66 for operating the air cylinder 41, and a supply shelf drive unit 67 for moving the supply shelf 42 up and down are each connected and schematically configured.

Here, the timer section 62 measures the time required for controlling the room temperature of the heat insulation room 30 and the time required for the measurement by the test machine main body 10.

The recording section 63 records the measurement results of the test by printing out the measured values in the test on recording paper, for example. Also, this recording unit 63
A writable memory is provided so that measured values can be backed up even when recording paper is exhausted. Note that this recording unit 6
3 is provided in the operation control unit 20.

In addition to the displacement sensor 52, the sensor section 65 is a confirmation sensor for confirming that the specimen 100 is arranged on the measuring table 91, and the specimen 100 is provided on each shelf of the supply shelf 42. A specimen presence / absence sensor for checking whether or not the specimen exists is provided.

Cylinder drive section 66 and supply shelf drive section 67
Is controlled by the main control unit (interlocking control means) 61 to operate the air cylinder 41 and the supply shelf 42 in an interlocked manner according to the test status of the specimen 100. Thereby, the specimen 100
Are satisfactorily moved and arranged between the measuring table 91 and the supply shelf 42.

Next, the operation of the wheel tracking tester 1 having the above configuration will be described.

FIGS. 6 and 7 are flowcharts showing the operation of the wheel tracking tester 1 according to the present invention.

As shown in the flowchart of FIG. 6, first, the operator places the specimen 100 to be tested on the supply shelf 4.
It is set to 2 (S1). Next, a timer is set by the operator for setting the temperature of the heat retaining room 30 to a predetermined room temperature (S2), and the automatic operation is started (S3). As a result, the test of the plurality of test specimens 100 is automatically performed without the operation of the operator under the control of the main control unit 61.

When the automatic operation is started, first, a timer is started (S4), and the air conditioning of the heat insulation room 30 is started. After a predetermined time elapses after the timer starts (S
5) It is considered that the room temperature of the heat retaining room 30 has reached a certain set temperature (the specimen 100 on the supply shelf 42 has also been cured to a predetermined temperature), and the automatic specimen supply section 40 of the tester main body 10 operates. Then (S6), the specimen 100 is automatically supplied, and the actual measurement is performed.

Next, a method of automatically supplying the specimen 100 by the specimen automatic supply unit 40 will be described with reference to the flowchart of FIG.

First, when the sensor unit 65 confirms that the specimen 100 is present in each row of the supply shelf 42 (S1).
1) The air cylinder 41 corresponding to the shelf where the specimen 100 exists moves forward (S12). As a result, the specimen 100 stored in the supply shelf 42 is moved and arranged on the measuring table 91. Incidentally, at this time, usually, the first moving arrangement is as shown in FIG.
Of the specimen 100a.

When the air cylinder 41 operates, it is confirmed by the sensor section 65 that the specimen 100 has been moved to the predetermined position on the measuring table 91 (S13), the traveling section 50 operates, and actual measurement of the test is performed. Then, recording of the measurement result is started (S14).

It is confirmed by the timer section 62 that a predetermined time (usually 60 minutes) required for the test has elapsed, and when all the recordings have been completed (S15), the main control section 61 is notified of the completion (S16). The specimen automatic supply unit 40 operates under the control of the main control unit 61.

At this time, the air cylinder 41 operates (S
17) First, the tested specimen 100 placed on the measuring table 91 is returned to the supply shelf 42.

When the specimen 100 is returned to the supply shelf 42,
Next, as the supply shelf 42 moves downward, the air cylinder 41 moves forward again, and the untested specimen 1 at the next stage is moved.
00 is moved and arranged on the measurement table 91. At this time, if the supply shelf 42 has reached the upper limit (S18; YES), it is considered that all the test pieces 100 in the supply shelf 42 have been tested, and the operation of the tester main body 10 ends, and the warming room The air conditioning of 30 is also stopped.

As described above, according to the wheel tracking tester 1 of the present embodiment, since the supply shelf 42 for accommodating a plurality of test specimens 100 is provided, a different from the heat insulation chamber 30 as in the prior art is provided. There is no need to cure the specimen 100 in the constant temperature curing room.

After the test specimens 100 have been set on the supply shelf 42, the air cylinders 41 continuously and automatically move and arrange the test specimens 100. Therefore, when a large number of test specimens 100 are measured, Also, as in the conventional case, the time required for transporting the specimen 100 can be reduced, and the working efficiency can be greatly increased.

The present invention is not limited to the above embodiment,
Various modifications are possible.

For example, in a wheel tracking test, three test specimens 100 are generally handled as one set. Therefore, in the above description, the traveling unit 50 is configured to have three test wheels 51 in accordance with this. The present invention is naturally effective even if the number of the test wheels 51 is smaller (or larger) than three. In this case, according to the number of test wheels 51, the number of air cylinders 41 of the
What is necessary is just to change the 2nd shelf configuration etc.

[0053]

As described in detail above, according to the present invention, the test specimens to be measured are automatically supplied from the storage shelf storing a plurality of test specimens, thereby simplifying the work conventionally performed manually. And continuous measurement is possible. As a result, the working efficiency of the wheel tracking test can be significantly increased.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing an overall configuration of a wheel tracking tester according to the present invention.

FIG. 2 is an external front view showing a schematic configuration of a tester main body 10 of the wheel tracking tester according to the present invention.

FIG. 3 is an external side view showing a schematic configuration of a tester main body 10 of the wheel tracking tester according to the present invention.

FIG. 4 is an external side view showing a schematic configuration of a tester main body 10 of the wheel tracking tester according to the present invention.

FIG. 5 is a block diagram showing a schematic configuration of a control system of the wheel tracking tester according to the present invention.

FIG. 6 is a flowchart illustrating the operation of the wheel tracking tester according to the present invention.

FIG. 7 is a flowchart for explaining a method of automatically supplying a specimen in a wheel tracking tester according to the present invention.

FIG. 8 is an overall configuration diagram showing the overall configuration of a conventional wheel tracking tester.

FIG. 9 is an external front view showing a schematic configuration of a tester main body 110 of a conventional wheel tracking tester.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wheel tracking test machine 10,110 Test machine main body 20,120 Operation control unit 30,130 Heat insulation room 40 Specimen automatic supply unit 41 Air cylinder 42 Supply shelf 50 Running unit 51 Test wheel 52 Displacement sensor unit 53 Detection auxiliary member 54 Rail Guide 61 Main control unit 62 Timer unit 63 Recording unit 64 Travel drive unit 65 Sensor unit 66 Cylinder drive unit 67 Supply shelf drive unit 90 Main frame 91 Measurement table 92 Travel rail 100 Specimen

Claims (2)

[Claims] 1. A wheel tracking tester for performing a wheel tracking test on a test object arranged on a predetermined measuring table, a storage shelf for storing a plurality of test objects to be used for the wheel tracking test, A specimen moving mechanism for moving and arranging an untested specimen on a shelf to the measuring table, and moving and placing a tested specimen from the measuring table to the storage shelf; and the storing shelf by the specimen moving mechanism. 1. A wheel tracking test machine comprising: a test wheel that reciprocates horizontally on a test piece moved and arranged from a vehicle; and a detection sensor that detects an amount of displacement of the test piece displaced by the horizontal reciprocation of the test wheel. 2. A wheel tracking tester for performing a wheel tracking test on a specimen placed on a predetermined measuring table, comprising a vertical movement mechanism, and accommodating a plurality of specimens to be subjected to the wheel tracking test. A storage shelf having a multi-stage shelf configuration, and an untested specimen in the storage shelf is moved to and arranged on the measurement table in accordance with the vertical movement of the storage shelf, and a tested specimen is moved from the measurement table to the storage shelf. A specimen moving mechanism for moving and arranging the specimen moving mechanism; interlocking control means for interlocking the storage shelf and the specimen moving mechanism in accordance with a test situation of the specimen; and moving and disposing the specimen moving mechanism from the storage shelf. It has a test wheel that reciprocates horizontally on the test specimen and a detection sensor that detects the amount of displacement of the test specimen displaced by the horizontal reciprocation of the test wheel. Wheel tracking testing machine to be.