JPH0249554Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a signal cable attachment/detachment mechanism in a signal cable sending device used for measuring the location of water leaks in water pipes.

Directly into tap water with water pressure and flow rate of water pipes,
Insert the water leakage sound sensor connected to the signal cable,
A water leakage sound sensor detects the water leakage sound generated from the leakage point of the water pipe by moving the water pipe, and the detected water leakage sound signal is transmitted to a measuring device on the ground via a signal cable to confirm the leakage of the water pipe. A method has been proposed for accurately measuring the location of a water pipe leak using a known correlation method.

In this method, a signal cable feeding device is used to insert and move a signal cable equipped with a water leak sound sensor into tap water in a water pipe.

As an example of this signal cable feeding device, a signal cable is introduced through a signal cable introduction opening into a groove on the outer circumferential surface of a cable feeding pulley installed in the water chamber of a housing consisting of a water chamber and a front chamber separated by a frame. The signal cables to be held are pressed into contact with the grooves on the outer peripheral surfaces of the first to fourth cable holding pulleys connected by respective arms,
When the water chamber is filled with tap water from the water pipe through the signal cable lead-out opening, the rotational force generated by the rotation of the rotary handle pivoted on the panel of the front chamber is transmitted through the rotational force transmission means installed in the front chamber. There is a structure in which the signal cable is transmitted to the cable feed pulley shaft to rotate the cable feed pulley in forward and reverse directions, and to send out or rewind the signal cable from the signal cable lead-out opening.

A signal cable feeding device having such a structure operates effectively for inserting and moving the signal cable connected to the water leakage sound sensor into the tap water of the water pipe, feeding the signal cable, and rewinding the signal cable from the tap water. be. However, the work of connecting and removing the water leakage sound sensor to the tip of the signal cable was performed at the site where water pipe leakage was measured. When connecting the water leakage sound sensor, expose the water chamber and
The tip of the signal cable was passed between the cable introduction hole of the pressurized water sealing device attached to the introduction opening side of the casing and the groove formed by the outer peripheral surfaces of the cable feed pulley and the first to fourth cable holding pulleys. The tip of the rear signal cable is connected to the water leakage sound sensor, but the above connection process involves detailed work such as processing the signal cable terminals, which is time consuming and difficult to carry out on site. It was hot.

In order to eliminate the above-mentioned conventional drawbacks, the present invention provides the above-mentioned signal cable feeding device.
- Aiming at providing a signal cable attachment/detachment mechanism that can easily press the grooves on the outer circumferential surface of each of the fourth cable holding pulleys and release them from this press-contact.
A pair of first NINU arms are rotatably attached to the shaft of the second cable holder pulley, sandwiching the cable holder pulley, and a pair of NINU arms are rotatably attached to the shaft of the third cable holder pulley, sandwiching the third cable holder pulley. A pair of connecting arms are rotatably connected to the ends of the first and second arms on the cable feed pulley side, respectively, and the other ends are connected to the first and second fastening arms for each of the first and second arms. The first and second fastening shafts are fixed to each other with a removable headed set screw, and the second cable holding pulley and the first cable holding pulley are connected to the first arm, The first cable holding pulley and the end of the third arm are rotatably connected to each other by a second arm, and the other end of the third arm is attached to a frame adjacent to the first cable holding pulley. The third cable holding pulley and the fourth cable holding pulley are the fourth arm, and the fourth cable holding pulley and the sixth arm are The ends of the sixth arm are rotatably connected to each other by a fifth arm, and the other end of the sixth arm is rotatable about a second rotating shaft supported on the frame adjacent to the fourth cable holding pulley. a first coil spring, which is attached so that it can be attached to the frame body, and whose one end is hung on the frame body, and whose tensile force causes the third arm to rotate and generate a pressure contact force against the signal cable on the first cable holding pulley; The device is characterized by being provided with a second coil spring that is hung on the body and rotates the sixth arm under a tensile force to generate a pressure contact force against the signal cable on the fourth cable holding pulley. It is.

The present invention will be explained below with reference to the drawings. Figure 1,
FIG. 2 shows a main part configuration of an embodiment of a signal cable feeding device equipped with a signal cable attachment/detachment mechanism according to the present invention and a sectional view taken along the line -- in FIG. and the front chamber 4 form a housing 6, the water chamber 2 is formed by the chamber 3, and the front chamber 4 is formed by the panel 5.
are attached to the frame 1, respectively.

The water chamber 2 includes a cable feed pulley 7 and the first to
Fourth cable holding pulley 11, 12, 13, 1
4 is arranged, and a signal cable introduction opening 15 of the chamber 3 is provided in the groove 7a on the outer peripheral surface of the cable feed pulley 7.
The signal cable 9 introduced via the pressurized water sealing device 17 is connected to the first to fourth cable holding pulleys 1.
Grooves 11 on the outer peripheral surface of each of Nos. 1, 12, 13, and 14
a, 12a, 13a, and 14a, and is pivoted to the panel 5 with the water chamber 2 filled with tap water from a water pipe (not shown) through the signal cable outlet opening 16 located below the chamber 3. The rotational force generated by the rotational operation of the rotary handle 18 is transmitted to the cable feed pulley shaft 10 via a gear mechanism 19 as a rotational force transmission means mounted in the front chamber 4, and the cable feed pulley 7 is rotated.

That is, the signal cable 9 introduced into the water chamber 2 through the signal cable introduction opening 15 by rotating the rotation handle 18 in the right direction is transferred to the cable feed pulley 7.
The signal cable was bent while being pressed into the groove 7a on the outer peripheral surface as described above, turned approximately 90 degrees, inserted into the water pipe through the signal cable lead-out opening 16 through the connection pipe 20, and moved into the tap water in the water pipe. The signal cable 9 is rewound by rotating the rotary handle 18 in the left direction.

By the way, the first to fourth cable holding pulleys 11,
12, 13, and 14 have grooves 11 on their outer peripheral surfaces.
A signal cable pressure adjustment mechanism 30 for press-contacting the signal cable 9 to the groove 7a on the outer circumferential surface of the cable feed pulley 7 by means of a, 12a, 13a, and 14a, and a signal cable attachment/detachment mechanism 50 for the signal cable 9 are provided.

The signal cable pressing force adjustment mechanism 30 is located at the first position when viewed from the axial direction of the rotating shaft 10 of the cable feed pulley
A rotary shaft 31 is provided symmetrically in the frame 1 on the signal cable introduction opening 15 side of the cable holding pulley 11 and on the signal cable lead-out opening 16 side of the fourth cable holding pulley 14, and is supported on the frame 1. The front chamber arm 32 is fixed to the end of the rotating shaft 31 on the front chamber 4 side with a pin 76 (see FIG. 8), the L-shaped support plate 33 is fixed to the front chamber 4 side of the frame 1, and the L-shaped The bent portion 33a is inserted into the hole of the bent portion 33a of the support plate 33.
The threaded rod 36 is fastened to the bent portion 33a with the nuts 34 and 35 that hold it in place, and the spring hanging shaft 77 (the eighth
(Fig.) and the water chamber side arm (third or sixth arm) 38 fixed to the water chamber 2 side end of the rotation shaft 31 with a pin 75 (Fig. 8). A connecting shaft 39 supported at the end of the chamber side arm 38, both ends of the connecting shaft 39, and both ends of the pulley shaft 11b of the first cable holding pulley 11 or the pulley shaft 14b of the fourth cable holding pulley 14. E-rings 11c, 11d, 14c, 1 respectively
A pair of second or fifth parts connected by 4d (Fig. 8)
arm 40a, 40b and a cylindrical arm fixture 41 that abuts the side of the front chamber arm 32 fixed to the front chamber 4 side surface of the frame 1.
The arms 40a and 40b are provided with cable guides 20a and 2 for smoothly guiding the movement of the signal cable 9.
0b is fixed with a screw 80 (FIG. 8). In the signal cable press contact force adjustment mechanism 30 configured in this way, the front chamber side arm 32 is pulled in the direction of arrow A by the tensile force of the coil spring 37, and the water chamber side arm 38 fixed to the rotating shaft 31 is moved in the direction of arrow B. direction and attach the E ring 78 to the connecting shaft 39.
Arm 4 fixed by c, 78d (Fig. 8)
0a, 40b in the direction of arrow C, and the pulling force of these arms 40a, 40b in the direction of arrow C causes the cable holding pulleys 11 and 14 to move so that the grooves 11a, 14a on their outer peripheral surfaces press against the signal cable 9. There is. Also, cable holding pulley 1
1, 12 are E-rings 11c,
11d (FIG. 8), 55a, 55b (FIG. 5), and are connected by a pair of first arms 8a, 8b, which are hooked by the cable holding pulleys 13, 14. Holding each pulley shaft 1
E-rings 56a, 56b (5th
), 14c, 14d (FIG. 8) are connected by a pair of second arms 8a, 8b, and the cable holding pulleys 12, 13 are further connected by a signal cable attachment/detachment mechanism 50. Therefore, the cable holding pulleys 11 and 14 are connected to the coil springs 37 and 14, respectively.
When the signal cable 9 is pulled by the tensile force of 37, the cable holding pulley 12 is pulled by the cable holding pulley 11, and the cable holding pulley 13 is pulled by the cable holding pulley 14, and the signal cable 9 is pulled onto their outer peripheral surfaces. groove 12a,
13a is used for pressure contact. The pressure of the signal cable 9 by the cable holding pulleys 11, 12, 13, 14 can be adjusted by tightening and adjusting the position of the threaded rod 36 with the nuts 34, 35. The tensile force can be adjusted.

Next, FIGS. 3 and 4 show the main part configuration of an embodiment of the signal cable attachment/detachment mechanism 50, and FIG.
Figure 5 shows the cross-sectional development of line-line and -line.
This will be explained with reference to FIGS. 6 and 7.

FIG. 3 shows cable holding pulleys 11, 12,
13 and 14 are grooves 11a and 12 on their outer peripheral surfaces.
A, 13a, 14a show a main part configuration diagram of the signal cable attachment/detachment mechanism 5 in a state in which the signal cable 9 is pressed into contact with the groove 7a on the outer peripheral surface of the cable feed pulley 7, and FIG. A main part configuration diagram of the cable attachment/detachment mechanism 50 is shown.

In FIGS. 3 and 4, the signal cable attachment/detachment mechanism 50 includes a pair of first nine arms 51 that are attached to the pulley shaft 12b with the second cable holding pulley 12 in between.
A, 51b sandwich the third cable holding pulley 13, and a pair of second Ninu arms 52a, 52b are rotatably attached to the pulley shaft 13b, respectively, and these first Ninu arms 51a, 51b and the second Ninu arm Cable feed pulley 7 of 52a and 52b
The respective end portions of the sides are connected by a pair of arms 57a, 57b, and a first arm 51a, 51
The other end of b is the first fastening shaft 72, and the other end of the second arms 52a, 52b is the second fastening shaft 73.
These first and second fastening shafts 7
2 and 73 are fastened and fixed to each other by a removable headed set screw 71 (Fig. 3), and the headed set screw 71
If the first and second fastening shafts 72 and 73 are loosened, the fastening fixation of the first and second fastening shafts 72 and 73 is released (FIG. 4). Among the above, the first nine arm 51a, 51
The details of how the second arms 52a and 52b are attached to the pulley shafts 12b and 13b are as shown in the exploded cross-sectional view of FIG.
a, 51b is a washer 53 at the bottom when viewed from the diagram of the pulley shaft 12b holding the cable holding pulley 12 between them.
a, insertion hole 8a ₁ of arm 8a, nine arm 51a
It is loosely inserted into the insertion hole 51a ₁ of the arm 8b, and the E ring 55a is hooked to the end thereof.
b ₁ is loosely inserted into the insertion hole 51b ₁ of the nine arm 51b, and the E ring 55b is hooked to the end of the first
The arms 51a and 51b are rotatably attached to the pulley shaft 12b.

Similarly, the attachment of the second arms 52a, 52b to the pulley shaft 13b is performed using the cable holding pulley 1.
3, the lower part of the pulley shaft 13b is the washer 54a, the insertion hole 8a ₂ of the arm 8a, the insertion hole 52a ₁ of the arm 52a, and the upper part of the pulley shaft 13b is the washer 54b, the insertion hole 8b ₂ of the arm 8b. , are loosely inserted into the insertion holes _52b1 of the nine arm 52b, and E-rings 56a and 56b are respectively hooked to both ends of the pulley shaft 13b.

Next, the first arms 51a, 51b and the second
A pair of connecting arms 57a, 57b at the ends of the arms 52a, 52b on the cable feed pulley 7 side.
As shown in the cross-sectional exploded view of Figure 6, the connection to the
Insertion holes 57a ₁ , 57 at both ends of the connecting arm 57a
The first and second arms 51a and 52 are attached to a ₂ , respectively.
Align the insertion holes 51a ₁ and 52a ₂ of the ba, and loosely insert the arm shafts 59a and 58a into these insertion holes, respectively, and attach the E-ring 61 to both ends of the arm shafts 59a and 58a, respectively.
a, 61b and 60a, 60b, the first and second arms 51a, 52a are connected by the connecting arm 57a, and similarly the connecting arm 5
Align the insertion holes 51b ₂ and 52b ₂ of the first and second arms 51b and 52b with the insertion holes 57b ₁ and 57b ₂ at both ends of 7b, respectively, and loosely insert the arm shafts 59b and 58b into these insertion holes, respectively. Arm axis 59
E-rings 63a, 6 are attached to both ends of b, 58b, respectively.
3b and 62a, 62b, the first and second arms 51b, 52b are connected by a connecting arm 57b.

Furthermore, the insertion holes 51a ₃ and 51b ₃ (hereinafter referred to as the seventh
(see figure) on the stepped portions 72a, 72 of the first fastening shaft 72.
b are loosely inserted, respectively, and these stepped portions 72a, 72b
E-rings 65a and 65b are respectively hooked to the first
The arms 51a and 51b of the first fastening shaft 72
The step of the second fastening shaft 73 is inserted into the insertion hole 52a 3 , 52b ₃ at the end opposite to the end of the second arm 52a, 52b connected to the arms 57a, 57b _respectively . The E-rings 66a, 66b are respectively hooked to the stepped portions 73a, 73b, and the second nine arms 52a, 52b are connected to the second fastening shaft 73. 1. A headed set screw 71 having a spring washer 74 is screwed into screw holes 72c and 73c formed in the second fastening shafts 72 and 73. Note that the first fastening shaft 72 is provided with an opening 72d that follows the screw hole 72c, making it easy to screw the headed set screw 71 into the screw holes 72c and 73c. As a result, the first and second arms 51a, 51b and 52a, 52b are
The first and second fastening shafts 72 and 73 are removably fixed with a headed set screw 71.

Next, using the signal cable attachment/detachment mechanism 50 configured as described above, the signal cable to which the water leakage sound sensor is connected is inserted into the groove 7a on the outer peripheral surface of the cable feed pulley 7.
The case of inserting it into the groove 7a and removing it from the groove 7a will be explained.

First, in order to insert the signal cable 9 with a running water sound sensor (not shown) into the groove 7a on the outer circumferential surface of the cable feed pulley 7, pressurized water is removed from the housing 6 of the signal cable feed device shown in FIG. Sealing device 1
Insert the signal cable 9 into the
With the water leakage sound sensor connected to the tip of the signal cable feeder and the signal cable 9 with the water leakage sound sensor
etc., to the water pipe leak measurement site. Next, the signal cable sending device is fixed to the connecting pipe 20, and the pressurized water sealing device 17 is fixed to the housing 6, respectively. In this case, tap water (not shown) from a water pipe is not introduced into the water chamber 2, and the chamber 3 of the water chamber 2 is removed from the frame 1. Also, the signal cable attachment/detachment mechanism 50
The first and second fastening shafts 72 and 73 are loosened and removed by loosening the headed set screw 71, and the signal cable attachment/detachment mechanism 50 is placed in the state shown in FIG. Note that in the state shown in FIG. 4, even if the tensile force of the coil spring 37 of the signal cable pressure adjustment mechanism 30 is applied, the cable holding pulleys 12 and 13 are not connected between the pulley shafts 12b and 13b. The first Nichi arm 51a, 52b and the second Nichi arm 5 are spaced apart from each other.
When arms 2a and 52b are released, they become larger than arms 8a and 8b, so the tension force of coil spring 37 causes cable holding pulleys 11, 12, 13, and
This is to hold the signal cable 9 in a position above the state in which it is pressed against the groove 7a on the outer peripheral surface of the cable feed pulley 7. Therefore, cable holding pulley 1
1, 12, 13, 14 and the cable feed pulley, and the cable guide 20 on the chamber 3 side.
b, 20b from the water chamber side arm 40b, the signal cable 9 with the water leakage sound sensor can be easily inserted into the groove 7a on the outer peripheral surface of the cable holding pulley 7. Further, the signal cable 9 equipped with the water leakage sound sensor can be easily removed from the groove 7a on the outer circumferential surface of the cable holding pulley 7 by the same method as described above after the water pipe leakage measurement is completed.

After inserting the signal cable 9 with the water leakage sound sensor into the groove 7a on the outer circumferential surface of the cable holding pulley 7, the fastening shafts 72 of the first and second arms 51a, 51b and the fastening shafts 73 of 52a, 52b are connected. If it is fixed as described above with the headed set screw 71, the signal cable attachment/detachment mechanism 50 will be in the state shown in FIG. The signal cable 9 can be pressed against the groove 7a on the outer peripheral surface of the pulley 7 with an appropriate pressure contact force, and then the chamber 3 is attached to the housing 1, and the water chamber 2 is filled with tap water to create a water leakage sound sensor. The attached signal cable is inserted into the water pipe and moved.

As explained above, according to the present invention, the signal cable is first inserted into the groove on the outer peripheral surface of the cable holding pulley.
- A signal for inserting and moving the cable holder pulley into the tap water of the water pipe by operating the rotary handle while being in pressure contact with the groove on the outer circumferential surface of the fourth cable holder pulley, and rewinding the signal cable from the tap water of the water pipe. In the cable feeding device, a pair of first arms are attached to the shaft of the second cable holding pulley, sandwiching the second cable holding pulley between the first and fourth cable holding pulleys, and sandwiching the third cable holding pulley. A pair of second arms are rotatably attached to the shaft of the third cable holding pulley, and the ends of the first and second arms on the cable feeding pulley side are rotatably attached to a pair of connecting arms. The other end is connected to the first and second arms for each of the first and second arms.
A signal cable attachment/detachment mechanism is provided, in which the signal cables are respectively fastened by second fastening shafts, and the first and second fastening shafts are fixed to each other by removable headed setscrews, and the first to fourth cable holders are connected to each other. Pressure contact with the signal cable by the grooves on the outer circumferential surface of the pulley and release of this pressure contact can be achieved simply by fixing the first and second fastening shafts with headed setscrews and releasing this fixation. It has the advantage that it can be easily inserted into and removed from the groove on the outer peripheral surface.

[Brief explanation of the drawing]

1 and 2 are main part configuration diagrams of an embodiment of a signal cable sending device equipped with a signal cable attachment/detachment mechanism according to the present invention, and a sectional view taken along the line -- in FIG.
FIG. 3 and FIG. 4 are main part configuration diagrams showing an embodiment of the signal cable attachment/detachment mechanism according to the present invention in a state in which the signal cable is pressed into contact and in a state in which it is removed, respectively.
Figures 6 and 7 are an exploded cross-sectional view taken along the line -, an exploded view taken along the line -, and an exploded view taken along the line - of Figure 3, respectively, and Figure 8 shows the signal cable pressing force adjustment mechanism 30 and the signal cable holding pulley 11. , 14 is a cross-sectional exploded view of the portion. 1...Frame body, 2...Water chamber, 3...Chamber, 4
... Front chamber, 5 ... Panel, 6 ... Housing, 7 ... Cable feed pulley, 8a, 8b ... Arm, 9 ...
...Signal cable, 10...Cable feed pulley shaft, 11, 12, 13, 14...Signal cable holding pulley, 11b, 12b, 13b, 14b...
Pulley shaft, 18... Rotating handle, 19... Rotating force transmission mechanism, 20a, 20b... Cable guide, 30... Signal cable pressure adjustment mechanism, 31
...Rotating shaft, 37...Coil spring, 38...
...Water chamber side arm, 40a, 40b...Arm, 5
0...Signal cable attachment/detachment mechanism, 51a, 51b...
...First Ninu arm, 52a, 52b...Second Ninu arm, 57a, 57b...Connection arm, 5
8a, 59a... Arm shaft, 71... Headed set screw, 72... First fastening shaft, 73... Second fastening shaft.

Claims (1)

[Scope of utility model registration request] The signal cable introduced from the signal cable introduction opening is connected by an arm to the groove on the outer circumferential surface of the cable feed pulley installed in the water chamber of the casing, which consists of a water chamber and a front chamber separated within the frame. 1st to 4th
The cable holding pulleys are in pressure contact with the grooves on the outer circumferential surface of each of the cable holding pulleys, and the rotational force generated by the rotating operation of the rotary handle pivoted on the panel of the front chamber is transferred to the cable through the rotational force transmission means installed in the front chamber. In the signal cable feeding device, the signal cable is transmitted to the pulley shaft of the feed pulley to rotate the cable feed pulley in forward and reverse directions to send out or rewind the signal cable from the signal cable lead-out opening, wherein the second cable holding pulley A pair of first
A pair of second Ninu arms are rotatably attached to the pulley shaft of the third cable holding pulley, and the ends of the first and second Ninu arms on the cable feeding pulley side are connected to a pair of Ninu arms, respectively. are rotatably connected by a connecting arm, and the other end has first and second fastening shafts rotatably attached, respectively.
The first and second fastening shafts are fixed to each other by a removable headed set screw, and the pulley shaft of the second cable holding pulley and the pulley shaft of the first cable holding pulley are connected to the first In the arm, the pulley shaft of the first cable holding pulley and the end of the third arm are rotatably connected to each other by a pair of second arms, and the other end of the third arm is connected to the end of the third arm. It is rotatably attached to a first rotating shaft that is rotatably supported on the frame body adjacent to the first cable holding pulley, and is connected to the pulley shaft of the third cable holding pulley and the fourth
The pulley shaft of the cable holding pulley is connected to the fourth
In the arm, the pulley shaft of the fourth cable holding pulley and the end of the sixth arm are rotatably connected to each other by a pair of fifth arms, and the other end of the sixth arm is connected to the end of the sixth arm. The third arm is rotatably attached to a second rotating shaft supported on the frame adjacent to the fourth cable holding pulley, and the third arm rotates to connect to the first and second cable holding pulleys. A first coil spring is applied with a tensile force in a direction that produces a pressure contact force on the signal cable, and has one end hung on the frame, and the sixth arm rotates to connect the fourth and third cables. A second coil spring is provided on the hold-down pulley, and a second coil spring is provided with a tensile force acting on the signal cable in a direction to produce a pressure contact force, and the second coil spring is hung on the frame body, and By releasing the fixation of the second fastening shaft, the distance between the second cable holding pulley and the third cable holding pulley opens, and the signal cable is held by the first to fourth cable holding pulleys against the signal cable. 1. A signal cable attachment/detachment mechanism in a signal cable feeding device, characterized in that the cable can be directly inserted into or removed from a groove on the outer peripheral surface of the cable feeding pulley by releasing the pressure contact.