JPS6326519A - Road surface measuring instrument - Google Patents

Abstract

PURPOSE:To improve the durability of a signal cable by providing a moving frame successively with cable trays which has recessed grooves and arranging a cable guide mean which is formed flexibly in a tension spring shape in the trays in a U shape. CONSTITUTION:A main frame 12 and the moving frame 14 are equipped with the cable trays 76A and 76B whose opening parts are put opposite each other, and the cable guide means 70 which is formed flexibly in the tension spring shape in the area sectioned by the trays 76 in the U shape, and the ends 70A and 70B of the means 70 are fixed to the corresponding one-end parts of the tray 76. Consequently, the means 70 is supported by either or both of the trays 76 in the range where the frame 14 is supported by the frame 12, and even when the frame 14 is moved, the signal cable in the means 70 follows up the frame 14 smoothly in the trays 76 without being exposed to the outside. Further, the damage, etc., of the cable due to the wearing in the operation of the means 70 are eliminated completely.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a road surface measuring device, and particularly to a road surface measuring device including a sensor section that moves along a measurement surface.

[Conventional technology]

FIG. 7 shows a conventional example. In this conventional example, the road surface E is
A main body frame 1 that is fixed and installed above, a slide frame 2 that is formed to be able to reciprocate from side to side in the figure along this main body frame 1, and a roller type measuring means 3 that is equipped on the slide frame 2. And this roller type measuring means 3
The shaft encoder 4 detects the vertical movement amount (change in h) as angle (θ) data "f(θ)=R-cosθ" and outputs this. It is intended to directly measure the unevenness of the road surface by moving the roller type measuring means 3 in the direction A or B in the figure. The signal cable is connected between the reciprocating shaft encoder 4 and a signal processing section (not shown) on the main body frame 1.

[Problem that the invention seeks to solve]

However, in such conventional examples, the signal cable also moves along the main body frame 1 as the shaft encoder 4 moves, but this signal cable often does not have any cable cover or the like. In some cases, the signal cable is given an extra bend, which poses a problem in terms of durability when using the signal cable.

Furthermore, if the entire signal cable is housed in a concave groove provided in a certain main body frame 1, the signal cable will be repeatedly bent double-fold due to the reciprocating movement of the sensor section and the entanglement of the cables. In addition to the disadvantage that the signal cable is easily damaged, the reciprocating range of the sensor section cannot be set to be longer than the length of the main body frame provided with the groove, for example. There was a drawback that the measurement area was limited within the length of the main body frame.

[Purpose of the invention]

The present invention improves the disadvantages of the conventional example, and in particular, provides a road surface measurement WiZ that can significantly improve the durability of the signal cable and expand the measurement area to more than twice the length of the main body frame. That is its purpose.

[Means for solving problems]

Therefore, in the present invention, a road surface measurement device includes a main body frame disposed along the road surface, a moving frame mounted on the main body frame so as to be movable back and forth, and a sensor section mounted on the moving frame. The main body frame and the movable frame are each equipped with cable trays with openings facing each other, and within the area defined by each cable tray is a cable guide formed in the shape of a tension spring and bendable. The above object is achieved by adopting a configuration in which the cable guide means is bent into a U-shape and each end of the cable guide means is fixed to a corresponding end of each of the cable trays. It is something.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

In FIG. 1, 11 indicates an ultrasonic transmitting/receiving section as a sensor section, and 12 indicates a main body frame.

The main body frame 12 is formed in a rectangular shape as shown in FIGS. 1 and 2, and is equipped with a moving frame 14 so as to be movable back and forth along its longitudinal direction (directions A and B in FIG. 1). . On this moving frame 14, the ultrasonic transmitting/receiving section 11 is arranged in the longitudinal direction of the moving frame 14 (
It is equipped to be able to reciprocate along directions (C and D directions in Fig. 1).

A plurality of signal cables, which will be described later, are provided between the ultrasonic transmitter/receiver 11 and the main body frame 12 for transmitting and receiving signals to and from the ultrasonic transmitter/receiver 11.

Reference numeral 70.80 indicates a bendable cable guide means that accommodates the signal cables IIR, IIT (see FIG. 5).

The cable guide means 70 and 80 include first and second cable trays 7 each having a substantially U-shaped cross section.
6.86. Each of the first and second cable trays 76, 86 has a film-like member fixed to its inner surface with a small coefficient of friction.

In this embodiment, the ultrasonic transmitter/receiver 11 is
As shown in the figure, an ultrasonic transmitter 11A and an ultrasonic receiver 11
B is used separately. The ultrasonic transmitter/receiver 11 is disposed facing the road surface E, as shown in FIG.

The conveyance means 13 includes a moving frame 14 extending from left to right in FIG. It is constituted by a driving means 16 that drives the vehicle to travel.

The movable frame 14 is engaged with and supported by the main body frame 12 via a first frame guide means 17. This first frame guide means 17 is connected to the main body frame 12.
It is located along the

Therefore, the movable frame 14 has a structure capable of reciprocating in directions A and B along the main frame 12, as shown in FIG.

The movable frame 14 has second frame guide means 18.
The above-mentioned ultrasonic transmitter/receiver 11 is installed via the ultrasonic transmitter/receiver 11 .

The ultrasonic transmitter/receiver 11 supported by the moving frame 14
is locked to the above-mentioned conveyance chain 15, and is urged by this conveyance chain 15 to move the moving frame 1 as will be described later.
4.It is designed to be able to move on the top.

The ultrasonic transmitting section 11A of the ultrasonic transmitting and receiving section 11 includes an excitation circuit section 30 for outputting predetermined pulsed ultrasonic waves.
Similarly, the ultrasonic receiving section 11B is also provided with a signal processing circuit section 31 for detecting and processing unevenness information of the road surface E from the received pulsed ultrasonic waves.

Furthermore, in FIG. 2, 40A and 40B indicate brake means. The brake means 40A, 40B are fixedly mounted on the main body frame 12, and normally have the function of applying a gentle braking force to the moving frame 14. Therefore, when the ultrasonic transmitter/receiver 11 is to be conveyed along the moving frame 14, the moving frame 14 is stopped. Furthermore, for example, when measuring the unevenness of an inclined surface, the movable frame 14 also functions to prevent free downward sliding of the movable frame 14.

Reference numerals 41A and 41B indicate frame sensors that constantly detect the presence or absence of the moving frame 14. This frame sensor 41A,
The brake means 4OA is energized by the output from the brake means 4OA.
Alternatively, 40B is activated immediately, thereby stopping the movement of the moving frame 14. Here, 4
1C indicates an AND gate, and 41D indicates a selection drive control section. Reference numerals 42 and 43 indicate legs each mounted on the main body frame 12. Further, 44 and 45 indicate stoppers provided on the moving frame 14 to stop the movement of the ultrasonic transmitter/receiver 11, respectively.

A shock absorber is attached to this stopper 44,45. Furthermore, 60 indicates tension adjustment means for the drive chain 21A.

Here, the above-mentioned conveyance chain 15 and drive means 16
etc. will be explained in more detail based on FIGS. 2 to 4.

As shown in FIGS. 2 and 4, the conveyance chain 15 includes a guide pulley 15A mounted on the moving frame 14.
, 15B. The moving frame 14 is
As shown in the figure, in this embodiment, the cross section is formed into a box shape with the bottom open, and the guide pulleys 15A and 15B are rotatably equipped at both ends of the box in FIG. 2, as described above. There is.

The above-described first frame guide means 17 and second frame guide means 18 are mounted on both sides of the movable frame 14 in FIG. 3, respectively.

This first and second frame guide means 17.18
is actually a moving frame 140 as shown in FIG.
Guide rails 17B, 18B fixed in parallel at equal intervals on both sides, and each guide rail 17B, 18B.
A set of two guide rollers 17A each engaged with the upper and lower ends of the
, 17A, ... 18A, 18A, ...
・It is composed of.

In this embodiment, a set of two guide rollers 17A, 1'7A for the moving frame 14 are arranged at positions s, -sz, sx, S4, . S
The moving frame 14 is equipped with the
When moving, the movable frame 14 is configured to be supported and guided at two or more locations. Also, the other two pieces 1
The guide rollers 18A, 18A of 'fJi are rotatably mounted on the case portion 11C of the ultrasonic transmitter/receiver 11 as shown in FIGS. 2 and 3. The drive means 16 includes a drive motor 20 equipped with a reduction gear mechanism 50 and a drive chain mechanism 21 engaged with the output shaft of the reduction gear mechanism 50.
and drive chain wheels 52A and 52B as a synchronous drive unit connected to this drive chain mechanism 21. Of these, the drive chain mechanism 21 includes a drive chain 21A and a drive chain 21A in this embodiment.
It is comprised of a driving chain wheel 21B that applies running force to the drive chain 21B, and three guide chain wheels 21C, 21D, and 21E that guide the traveling of the drive chain 21A as shown in FIG. Of these, the guide chain wheels 21C and 21D are arranged below both ends of the main body frame 12, and the drive chain wheel 21B and the guide chain wheel 21E are arranged above both ends of the main body frame 12.

Further, as shown in FIGS. 2 and 3, the guide chain wheels 21D and 21E include drive chain wheels 52A and 5 as synchronous drive units that apply running force to the conveyor chain 15.
2B are installed coaxially, so that the driving force of the drive chain mechanism 21 is smoothly transmitted to the conveyor chain 15.

As shown in FIG. 3, a case 11C of the ultrasonic transmitter/receiver 11 is attached to the conveyor chain 15 via a connecting portion 11B.

Further, the output shaft of the reduction gear mechanism 50 is equipped with an encoder 60 that regulates the repetition time of the excitation pulse signal output from the excitation circuit section 30 described above. 3
2A indicates a sensor section for the excitation circuit section 30 which inputs a predetermined signal from the encoder 60, and 32B indicates a case section in which the excitation circuit section 30 is housed.

The one cable guide means 70 is
(As shown in 2+, a bendable cable guide 71 formed in a tension spring shape and relatively long; a non-stretchable and bendable flexible wire member 72 disposed within the cable guide 71; A locking member 73 integrally fixes both ends of the flexible wire member 72 to both ends of the coiled cable guide 71.

Of these, the cable guide 71 is formed of piano wire in this embodiment. Further, as the flexible wire member 72, a nylon coated flexible wire is used in this embodiment.

Therefore, the flexible wire member 72 acts to sufficiently resist the tensile force applied to the entire body from the outside, thereby preventing deformation due to the overall tension. There is. On the other hand, the coiled cable guide 71, which is the outer sheath, acts to sufficiently resist compressive external forces, thereby preventing problems such as irregular and abnormal bending.

The other cable guide means 80 is also constructed exactly the same as the cable guide means 70 on the other side, and functions in the same manner.

The first cable tray 76 is equipped with one cable guide means 70 bent into a U-shape. This first cable tray 76 is shown in FIGS.
As shown in the figure, it is composed of a fixed tray portion 76A mounted on the main body frame 12 and a movable tray portion 76B mounted on the movable frame 14. Here, each tray part 76A.

76B are mutually open on their opposing surfaces. At the left end of each of these tray portions 76A and 76B in FIG.
The ends 70A and 70B of 0 are respectively engaged as shown in FIG. To explain this in more detail, one cable guide means 70 has one end 70A connected to the main body frame 1.
The fixed tray portion 76A on the second side and the other end portion 70B are attached to the movable tray portion 76B of the 14 movable frames, respectively.
As shown in the figure (fixed). Fig. 5 (1) shows a case where one cable guide means 70 is fixed by a spring clamp 74. Fig. 5 (2) shows a case in which an intervening device such as a rubber cushion is used. This shows an example in which the cable guide means 70 is fixed via the member 74A.

Furthermore, the fixed tray portion 76A and the movable tray portion 76B
As shown in FIG. 3, the bottom surface portions of the opposing surfaces have bulging portions 76C, 7 that bulge upward as a whole, as shown in FIG.
6D is provided. Therefore, even if there is a difference in height between the main body frame 12 and the movable frame 14 or a change in the distance between them, the spring action of the cable guide means 70 allows the cable guide means 70 to easily jump over the gap and maintain the connected state. This has the advantage of being possible.

Moreover, even when the cable guide means 70 is tilted to the right or left in FIG. 3, the inconvenience of the cable guide means 70 falling out is completely eliminated. The second cable tray portion 86 is secured to the moving frame 14 as shown in FIGS. 1 and 3. This second cable tray part 8
6 is equipped with the other cable guide means 80 bent into a U-shape. One end 80A of the other cable guide means 80 is fixed to the left end of the second cable tray portion 86 in FIG. The other end 80 of this other cable guide means 80
B is fixed to the ultrasonic transmitting/receiving section 11 side as a sensor section.

The method of securing each end of this cable guide means 80 is as follows.
The same technique as in the case of the one cable guide means 70 shown in the figure is adopted. Therefore, as the ultrasonic transmitting/receiving section 11 moves in the C (or D) direction, the bending section 80
C also moves in the same <C (or D) direction at 1/2 the speed.

Further, the second cable tray part 86 has a bending motion regulating means for the cable guide between the left end in FIG. A partition plate 87 is provided. Therefore, even if the ultrasonic transducer 11 moves in a direction that rapidly compresses the cable guide means 80 due to a direction change, etc., the guide action of the partition plate 87 and the spring action of the cable guide means 80 will cause the cable guide means to 80 is not bent more than necessary, and thus the signal cable is effectively protected.

Next, the overall operation of the above embodiment will be explained.

First, in a normal state, since the brake means 40A or 40B loosely locks the movable frame 14, the movement of the movable frame 14 is stopped at this point. In this case, one cable guide means 70 is also in a stopped state. Now, when the driving means 16 is activated and the conveying chain 15 is rotated in the counterclockwise direction in FIG. C direction (to the right in FIG. 2), and at the same time, the portion of the cable guide means 80 from the bending portion 80C to the ultrasonic transmitting/receiving section 11 side moves together. Here, even if the ultrasonic transmitter/receiver 11 comes into contact with the stopper 45 of the moving frame 14, the driving means 16 is not stopped at all.

Therefore, when the ultrasonic transmitter/receiver 11 comes into contact with the stopper 45, the moving frame 14 also touches the ultrasonic transmitter/receiver 11.
As the movement moves to the right in Figure 2, the second
Move to the right in the diagram. Therefore, in this case, each bending portion 70C of each cable guide means 70, 80 on one side and the other side
, 80C to the moving member move integrally in the same direction.

FIG. 6 shows how the moving frame 14 moves from the left to the right in FIG. 2, and along with this, each cable tray part 76B, 86 also moves in the same direction as shown in FIG. Move to. Here, the movable frame 14 is guided by the guide roller 17A located at 83 of the main body frame 12, moves to the right, and then moves to the right by each guide roller 17 of S, SS.
Guided by A, move further to the right.

On the other hand, in the driving means 16, running force was applied to the conveyor chain 15 via the driving chain wheel 52A, but as the moving frame 14 moves, the other driving chain wheel 52A
Running force is applied to the conveyor chain 15 from B. In this case, the other driving chain wheel 52B
As shown in FIG. 6, the conveyor chain 15 can be engaged and disengaged very easily.

Then, when the left end of the moving frame 14 in FIG. 2 enters the right side of the position sensor 41B, the selection drive control section 41D that has received this information immediately operates to disconnect the drive motor 20 from the power source, and at the same time, the moving frame 14 14 is stopped.

Next, try to reverse the rotation of the drive motor 20 by operating the control means (not shown) (by this operation, the brake means 40
B is released from a complete stop motion with respect to the moving frame 14).

In this case, the ultrasonic transmitter/receiver 1 located at the right end in FIG.
1 (position of the imaginary line) first starts moving to the left (direction D) in the figure.

On the other hand, the movable frame 14 is prevented from moving at all by the gentle locking action of the brake means 40B. Therefore, the ultrasonic transmitter/receiver 11
4 independently moves in the direction D in the figure until it comes into contact with a stopper 44 provided at the left end in FIG. in this case,
The ultrasonic transmitter/receiver 11 side from the bending portion 80C of the other cable guide means 80 also moves integrally in the D direction. However, one cable guide means 70 remains in a stopped state. The ultrasonic transmitter/receiver 11 that has come into contact with the stopper 44 then moves to the left in the figure together with the movable frame 14, and at the same time, the portion of one cable guide means 70 on the movable frame 14 side also moves together. When the right end of the movable frame 14 in FIG. 2 moves to the left of the position sensor 41A, the braking means 40A receiving this information immediately disconnects the motor 20 from the power source and stops the movable frame 14.

During this time, since the signal cable is not exposed at all, the frictional force between each of the cable guide means 70.80 and each of the first and second cable trays 76.86 is less than that of the conventional signal cable exposed type. Therefore, the capacity of the drive motor for each part can be set to be extremely small.

Also, the signal cable is not worn out, so its durability is significantly increased.

Thereafter, by performing the same operations as described above, the ultrasonic transmitting/receiving section 11 repeatedly performs the same operations as described above, and during this time, the unevenness of the road surface is effectively measured.

In the above embodiment, a piano wire is used as the cable guide 71, but it may be made of a plastic member, for example, as long as it functions equally well.

〔Effect of the invention〕

According to the present invention, the main body frame and the movable frame are each equipped with cable trays with openings facing each other, and within the area defined by each cable tray,
A bendable cable guide means in the shape of a tension spring is bent into a U-shape, and each end of the cable guide means is fixed to a corresponding end of the cable tray. As long as the moving frame is within the range supported by the main body frame,
The cable guide means is supported by either cable tray or both cable trays, so that even if the movable frame moves, the signal cables within the cable guide means are not exposed to the outside and can be routed. It is possible to smoothly follow the moving frame within the tray, and the reciprocating distance of the moving frame can be set to more than 2.5 times the length of the main frame.
This allows the measurement range of the road surface to be expanded to more than 2.5 times that of the main body frame, and the action of the cable guide means completely eliminates damage caused by abrasion of the signal cable and accidents caused by noise signal contamination. It is possible to provide an unprecedented and excellent road surface measuring device that can perform the following tasks.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view showing an embodiment of the present invention, FIG. 2 is a partially omitted front view of FIG. 1, and FIG. 3 is an I[[
-I
FIG. 6 is an explanatory view showing the overall operation of FIG. 2, and FIG. 7 is a front view showing a conventional example. 11...Ultrasonic transmitting and receiving unit as a sensor unit, 1
4...Moving frame, 70...Cable guide means, 76...Cable tray, 76
C, 76D...bulge. Patent applicant Tokyo Co., Ltd. Instrument Figure 4 Figure 5 Figure 7 VA

Claims (2)

[Claims] (1) In a road surface measurement device having a main body frame disposed along the road surface, a movable frame mounted on the main body frame so as to be movable back and forth, and a sensor section mounted on the movable frame, Each of the main body frame and the movable frame is equipped with cable trays with openings facing each other, and within the area defined by each cable tray, a cable guide means formed in the shape of a tension spring and bendable is provided. A road surface measurement device characterized in that the cable guide means is bent in a U-shape and each end of the cable guide means is fixed to a corresponding end of each cable tray. (2) In a road surface measurement device having a main body frame disposed along the road surface, a movable frame mounted on the main body frame so as to be movable back and forth, and a sensor section mounted on the movable frame, Each of the main body frame and the movable frame is equipped with cable trays with openings facing each other, and within the area defined by each cable tray, a cable guide means formed in the shape of a tension spring and bendable is provided. A surface on which the cable guide means of each cable tray is placed, bent in a U-shape, each end of the cable guide means being fixed to a corresponding end of each of the cable trays. A road surface measurement device characterized in that the entire outer edge portion of the device is bulged toward the cable guide means.