JPH0216089B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a signal cable guide device,
In particular, the present invention relates to a signal cable guide device suitable for various measuring instruments in which a sensor section is formed to move in a restricted manner.

[Conventional technology]

There are various conventional measuring instruments with moving sensor parts, such as ultrasonic flaw detectors and road surface measurement devices. In this case, since the main body of the measuring instrument and the sensor part are connected via a signal cable, depending on the type of measuring instrument or the size of the measurement area, the method of equipping the signal cable is important. .

For example, in the road surface measuring device shown in FIG. 10, the sensor section is configured to move while the signal cable is left alone.

To explain this in more detail, the conventional example shown in FIG. 10 includes a main frame 1 that is stopped and installed on the road surface E during measurement, and a main frame 1 that is movable back and forth to the left and right in the figure along this main frame 1. The vertical movement amount (change in h) of the slide frame 2 equipped on the slide frame 2, the roller type measuring means 3 equipped on this slide frame 2, and the vertical movement amount (change in h) of the angle (θ) is expressed as ``f(θ)''. =l·cosθ" and outputs the detected value. It is intended to directly measure the unevenness of the road surface by moving the roller type measuring means 3 in the direction of 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]

In the above conventional example, the shaft encoder 4
Along with the movement, one end of the signal cable also moves along the main body frame 1. In this case, the signal cable often does not have any cable cover or the like, and there are cases where the signal cable is given an extra bend, which poses a problem in durability when using the signal cable.

[Purpose of the invention]

SUMMARY OF THE INVENTION The present invention aims to provide a signal cable guide device that improves the disadvantages of the conventional example, particularly prevents damage to the signal cable during measurement, and improves the durability of cable connection points. purpose.

[Means for solving problems]

Therefore, in the present invention, a bendable cable guide that is formed in the shape of a tension spring and is relatively long is provided, and a non-stretchable and bendable flexible wire member is disposed inside this cable guide. At least both ends of the member are integrally engaged with the ends of the cable guide. This aims to achieve the above-mentioned purpose.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

In FIG. 1, reference numeral 10 designates a flexible cable guide in the form of a tension spring and of relatively long construction. Although the cable guide 10 is made of a metal member (actually piano wire) in this embodiment, it may be made of a plastic member.

Further, although this cable guide 10 has a circular cross section as shown in FIG. 2 in this embodiment, it may also have a rectangular cross section as shown in FIG. 3.

A non-stretchable and bendable flexible wire member 11 is disposed within the cable guide 10. This flexible wire member 11 is
Although a flexible wire with a nylon coat is used in this embodiment, other members may be used as long as they are non-stretchable and bendable.

Locking members 12 are fixed to both ends of the flexible wire member 11 . This locking member 12
As shown in FIG. 4, this embodiment uses a method in which the end portion of the flexible wire member 11 is rolled up and then fixed with a crimp terminal 12A.

In this embodiment, the cable guide 10 in the form of a coiled spring is secured at one end 1 by a spring clamp 13.
0A is fixed to a fixed location on the main body of the measuring instrument (not shown). In addition, the other end (not shown) is also connected to one end 1 in the sensor portion.
It is designed to be fixed in the same way as 0A. Fifth
The figure shows a case in which the flexible wire member 11 is fixed to the main body of the measuring instrument together with one end 10A of the cable guide 10 using the spring clamp 13.

Here, numerals 14 and 15 indicate signal cables, respectively. Also, one end 1 of the cable guide 10
0A is spring clamp 1 in FIGS. 1 and 5.
Although the case of direct fixation is illustrated in FIG. 3, in reality, a fixation is used in which fixation is provided via an intervening member 13A such as a rubber cushion, as shown in FIG.

Furthermore, a cylindrical reinforcing member 13B may be inserted and fixed inside both ends of the cable guide 10, as shown in FIG. This has the advantage that both ends of the cable guide 10 can be more robustly attached to the measuring instrument body and the sensor section, respectively.

Next, an example of the use of the embodiment shown in FIG. 1 will be explained based on FIGS. 8 and 9.

The devices shown in FIGS. 8 and 9 are devices that measure the unevenness of a road surface using ultrasonic waves. In these figures, the symbol E indicates the road surface, and the symbols 20, 2
Reference numeral 1 indicates an ultrasonic transmitting/receiving section as a sensor section. Further, reference numeral 22 indicates a main body frame that extends left and right as shown in the figure and has a function of holding the movable frame 24.

In this embodiment, one of the ultrasonic transmitter/receivers 20 includes an ultrasonic transmitter 20A and an ultrasonic receiver 20B. Also,
The other ultrasonic transmitter/receiver 21 similarly includes an ultrasonic transmit signal 21A and an ultrasonic receiver 21B.

The ultrasonic transmitting/receiving signals 20 and 21 are fixedly installed at both ends of a moving frame 24 disposed facing the road surface E, as shown in FIG.

The ultrasonic transmitting/receiving units 20 and 21 are transported by a moving frame 24 that is movable from side to side in FIG.
A fixed chain 25 as a driven means mounted on the frame 4 and a driving means 26 for driving the movable frame 24 to travel via the fixed chain 25.

The moving frame 24 has a frame guide means 27
It is engaged with and supported by the main body frame 22 via. This frame guide means 27 is arranged along the main body frame 22. Therefore, the movable frame 24 has a structure that allows it to reciprocate in directions A and B along the main frame 22 as shown in FIG. A cable tray 60 having a U-shaped cross section is installed on the movable frame 24.

Ultrasonic device unit 20 of ultrasonic transmitting and receiving units 20 and 21
As shown in FIG. 8, excitation circuits 30 and 40 for outputting different predetermined pulsed ultrasonic waves are provided in A and 21A, respectively. Also,
The ultrasonic receiving units 20B and 21B are provided with signal processing circuit units 31 and 41 for detecting and processing unevenness information on the road surface E from the received pulsed ultrasonic waves.

The frame guide means 27 installed on the moving frame 24 is actually a guide rail 27B.
A pair of guide rollers 27A, 27A, which are engaged with the upper and lower ends of this guide rail 27B,...
It is composed of. In this embodiment, these two guide rollers 27A, 27A are connected to S 1 , _27A on the main body frame 22, as shown in FIG.
They are provided at five locations, S ₂ , S ₃ , S ₄ , and S ₅ , thereby creating a structure in which the movable frame 24 can be supported and guided at two or more locations when the movable frame 24 moves.

The drive means 26 includes a drive motor 50 equipped with a reduction gear mechanism, a drive chain mechanism 51 engaged with the output shaft of the reduction gear mechanism, and a drive chain as a synchronous drive unit connected to the drive chain mechanism 51. It is composed of cars 52 and 53. Of these, the drive chain wheel 51 includes a drive chain 51A and a drive chain mechanism 51 in this embodiment.
A driving chain wheel 51B that applies running force to A;
It is comprised of a guide chain wheel 51C that guides the travel of the drive chain 51A as shown in FIG.

Then, as shown in FIG.
1A is equipped with drive chain pulleys 52 and 53 as synchronous drive units that apply running force to the movable frame 24 via the fixed chain 25 described above.

Further, reference numeral 54 indicates a brake means coaxially installed on the guide chain car 51C. This brake means 54 is adapted to operate when the guide chain wheel 51C rotates at a certain number of revolutions. The ultrasonic transmitting/receiving units 20, 21 and the above-mentioned signal system include signal cables 14A, 14B, 15A, 1
It is connected via 5B. The signal cables 14A, 14B, 15A, and 15B are arranged within the cable guide 10 described above. and,
This cable guide 10 is arranged in a bent manner within a cable tray 60, as shown in FIG.

The cable tray 60, as shown in FIG.
Fixed tray section 60 attached to main body frame 22
A and a movable tray section 60B mounted on the movable frame 24. The end portions of the cable guides 10 described above are respectively attached to the left end portions in FIG. 9 of the tray portions 60A and 60B. Here, each tray section 60A, 60B is
The opposite side is open. Therefore, as the movable frame 24 moves, the bent portion 10A of the cable guide 10 moves smoothly and sequentially. FIG. 9 is an example in which the moving frame moves from left to right.

Then, the ultrasonic transmitting/receiving sections 20 and 21 described above
As the movable frame 24 moves, it is possible to measure the unevenness of the road surface on the passing line with high precision.

In this case, the cable guide 10 is equipped with the bendable flexible wire 11 that does not expand or contract inside, as described above, so that the cable guide 10 itself is prevented from elongating, and the coil spring has a close contact structure. As a result, the bending portion 10A, which changes with the moving frame 24 described above, does not move irregularly and does not apply excessive tension or compression to the cable. The bending portion 10A is configured to move smoothly and sequentially without giving any force.
Furthermore, the bent portion can be returned to its original position very easily due to the inherent spring action of the cable guide 10.

Therefore, by installing the signal cables 14A, 14B, 15A, and 15B in the cable guide 10, accidents that damage the signal cables are completely eliminated, and the electromagnetic shielding effect of the cable guide 10 significantly reduces the intrusion of external noise. The number of signal cables 14A, 14B, 15A,
Since 15B is not scattered outside, there is an advantage that workability is greatly improved.

〔Effect of the invention〕

Since the present invention is configured and functions as described above,
According to this, multiple signal cables can be installed inside and can be bent freely by the action of the cable guide, so even if the cable is installed, it will not be bent more than necessary and will always maintain a constant radius of curvature. This makes it possible to always maintain a constant radius of curvature without bending the bending equipment more than necessary, and the action of the flexible wire suppresses expansion and contraction. Even if the bent part moves, it can be returned to its original straight state very easily, and damage to the signal cable stored inside can be almost completely eliminated. It is possible to provide a signal cable guide device that is unprecedented and excellent in versatility and can improve the durability of cable connection points because contact accidents with cables are eliminated.

[Brief explanation of drawings]

FIG. 1 is a partial perspective view showing one embodiment of the present invention;
FIG. 2 is an explanatory diagram showing the coiled spring-like cable guide means in FIG. 1, FIG. 3 is an explanatory diagram showing another example of the coiled spring-like cable guide means, and FIG. FIG. 5 is an explanatory diagram showing a locking state of the flexible wire in FIG. 8 is a partial sectional view showing a case where a tubular member is installed at the end of the cable guide means, FIG. 8 is an explanatory view showing a road surface measuring device equipped with the embodiment shown in FIG. 1, and FIG. FIG. 10 is an explanatory diagram showing the installation status and function of the cable guide means in the conventional example. 10...Cable guide means in the form of a coiled spring,
10B...Tubular member, 11...Flexible wire.

Claims (1)

[Claims] 1. A bendable cable guide formed in the shape of a tension spring and relatively long is provided, and a non-stretchable and bendable flexible wire member is disposed inside the cable guide, A signal cable guide device, wherein at least both ends of the wire member are integrally engaged with the ends of the cable guide. 2. The signal cable guide device according to claim 1, wherein the coiled spring-like cable guide has a circular cross section. 3. The signal cable guide device according to claim 1, wherein the coiled spring-like cable guide has a rectangular cross section.