JPH036617Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a cable winding device, and more specifically, it is used to inspect and repair the inside of underground steel pipes that transport fluids such as city gas. This invention relates to the structure of a cable winding device used when inserting or retrieving inspection equipment such as a camera into a pipe.

BACKGROUND ART Conventionally, cable winding devices used when inserting or retrieving inspection equipment such as television cameras into pipes have had the problem of rotational twisting occurring in the cable when feeding or winding the cable. I was getting used to it. Therefore, in the typical prior art, a slip ring consisting of a brush and a rotating electrode was used on the rotating shaft of the winding drum.

Problems to be Solved by the Present Invention In the prior art described above, when the number of cores in the cable increases, contact failures occur and noise generation increases. Furthermore, when the number of cores is 20 to 40, the slip ring itself becomes large.
Moreover, such slip rings are extremely expensive.

The purpose of this invention is to solve the above technical problems,
To provide a cable winding device which prevents rotational twisting of a cable without using a slip ring.

Means for Solving the Problems The present invention provides a trolley 4 equipped with wheels 27 at the bottom.
A first drum 2, a pair of flanges 11a and 11b provided at both ends of the first drum 2 and protruding radially outward from the first drum 2, and one of the first drums 11a. , one end is provided coaxially on the opposite side to the first drum 2, and the first drum 2
a second drum 3 having a diameter smaller than that of the second drum 3; a second flange 11c provided at the other end of the second drum 3 and protruding outward in the radial direction than the second drum 3; first cable 5a
The second drum 3 includes a second cable 5b wound in the same winding direction as the first cable 5a, and the first and second drums 2 and 3 are rotatably supported by a trolley 4. The one first flange 11a has a mounting hole 12 located radially outward from the winding position of the second cable 5b and radially inward from the first drum 2.
is formed, and further, a substrate 13 is removably attached to the outer surface of the one first flange 11a and covers the attachment hole 12.
and is fixed to the substrate 13 so as to protrude inward from the first drum 2, and the first and second drums are fixed to the inside of the first drum 2.
A terminal board 15 that electrically connects the ends of the cables 5a, 5b, and a first flange 11a, 11 fixed to the trolley 4.
a guide tube 17 extending parallel to the rotation axis of the first drum 2 in the radial direction outward of b and having a guide hole 21 extending along the axial direction; movable piece 1 that contacts the side surface of the first cable 5a
8 is housed in the guide tube 17, one end is fixed to the guide tube 17, the other end is connected to the movable piece 17 through the guide hole 21, and the movable piece 18 is fixed to the guide tube 17 on one side in the axial direction. The cable winding device is characterized in that it includes a spring 19 that biases the cable winding device.

Effect According to the present invention, a flexible cable is connected between the rotatable first drum and the second drum, which has a smaller diameter than the first drum and is fixed concentrically with the first drum. Wind in the same direction. As a result, when the first and second drums rotate, the amount of winding of the flexible cable wound around the first drum is greater than the amount of winding of the flexible cable wound around the second drum. It becomes extremely large. Therefore, by winding the movable side cable connected to, for example, inspection equipment on the first drum, and winding the fixed side cable such as the power source on the second drum, the cable can be smoothly sent out or wound up. This can prevent rotational twisting of the cable. Furthermore, according to the present invention, among the pair of flanges 11a and 11b provided at both ends of the first drum 2, one of the first flanges 11a is provided with the second drum 3, and one of the first flanges 11a (i.e., the surface on the second drum 3 side), one of the first
A board 13 is detachably attached to cover the mounting hole 12 formed in the flange 11a, and a terminal plate 15 protruding inward from the first drum 2 is fixed to this board 13. 15 electrically connects the ends of the first and second cables 5a, 5b inside the first drum 2. Therefore, the first cable 5 wound around the first drum 2
For example, the second drum 3 has a structure suitable for relatively strong inspection, whereas the second drum 3 has a small diameter.
When the second cable 5b wound on the terminal plate 15 has a flexible configuration that is easy to handle, the terminal plate 15 is used to interconnect the first and second drums.
Since such a terminal plate 15 is arranged inside the drum 2, it does not interfere with the winding work of the first and second cables 5a and 5b, and the terminal plate 15 is arranged inside the drum 2. It cannot be damaged. Further, the work of connecting the cables 5a, 5b to the terminal board 15 can be performed outside the first drum 2, resulting in good workability.

Furthermore, according to the present invention, the first cable 5a is relatively strong and is used for inspection, for example.
can contact the movable piece 18 biased by the spring 19 and be wound on the first drum 2 in a layered manner, so that the first drum 2
The first cable 5a can be wound over a long distance, and the cable 5a can be easily handled.

Embodiment FIG. 1 is a side view of a winding device 1 according to the present invention, and FIG. 2 is a front view of the winding device 1. The first drum 2 and the second drum 3 are rotatably supported by a truck 4. The second drum 3 is the first drum 2
It has a smaller diameter than the diameter of , and is fixed to the first drum 2 . A flexible cable 5a is wound around the outer periphery of the first drum 2. 2nd drum 3
A flexible cable 5b is wound around the outer periphery of the cable 5b. One end of the cable 5a is connected to inspection equipment 6, such as a television camera, that inspects the inner peripheral surface of the underground steel pipe. Further, one end of the cable 5b is connected to a power source 7 or the like. The winding direction of cable 5a and cable 5b is the same.

As shown in the third figure, the cable 5a includes a flexible lead wire 8, a guide tube 9 through which the lead wire 8 is loosely inserted, and a polyethylene coating layer 10 covering the guide tube 9. The guide tube 9 is made of FRP (fiber-reinforced plastic) and has rods extending in the axial direction and closely spaced in the circumferential direction. Since the cable 5a has the guide tube 9 in this way, it can obtain the necessary rigidity when being pushed into the underground steel pipe, and can prevent the lead wire 8 from buckling. In addition, since the guide tube 9 is made of flexible FRP,
The direction of the inspection equipment 6 can be changed freely. The other cable 5b is a flexible and soft general cable, making it easy to handle.

At both ends of the first drum 2, flanges 11a,
11b is provided. These flanges 11a, 11
b projects further radially outward than the first drum 2. Further, a flange 11c is provided at the left end of the second drum 3 in FIG. This flange 11c projects outward in the radial direction of the second drum 3.

A mounting hole 12 is formed in the flange 11a as shown in FIG. A substrate 13 covering the attachment hole 12 is attached to the outer surface of the flange 11a with screws 14. This board 13 has
A terminal board 15 protruding inward from the first drum 2 is fixed. On this terminal plate 15, the other end of the cable 5a and the other end of the cable 5b are electrically connected. In addition, cable 5a and cable 5b
is fixed onto the terminal board 15 by a fastener 16.

The cable 5a and the cable 5b are connected to the terminal board 15.
When connecting via the flange 11a,
The board 13 is removed from the terminal board 13, and the cables 5a and 5b are pulled out and fixed onto the terminal board 15. Thereafter, the terminal board 15 is made to protrude inward from the first drum 2 through the mounting hole 12, and the board 13 is fixed to the first drum 2 with the screws 14 in this state. In this way, the cable 5a and the cable 5b can be connected externally, thus improving work efficiency.

A guide cylinder 17 is provided above the first drum 2 and extends parallel to the rotational axis of the first drum 2 . As shown in FIG. 5, an annular movable piece 18 is mounted on the outer periphery of the guide tube 17 so as to be displaceable in the axial direction. A spring 19 is housed in the guide tube 17, one end of which is fixed to the right end of the guide tube 17, and the other end connected to a pin 20. This pin 20 is inserted through a guide hole 21 formed on the outer periphery of the guide tube 17 and extending in the axial direction, and is inserted into the movable piece 18.
connected to.

When winding the cable 5a around the outer periphery of the first drum 2, it is wound from the left side of the outer periphery of the first drum 2 to the right side in FIG. At this time, the movable piece 18 is biased to the left by the spring 19, so the cable 5a is wound in a neat manner between the movable piece 18 and the flange 11a.

The truck 4 includes a plate-shaped body 22 and a pair of leg parts 23a and 23b that are integrally formed with the plate-shaped body 22 and arranged on both sides of the drums 2 and 3. Legs 23
A, 23b are provided with brackets 24a, 24b. These brackets 24a and 24b include
A U-shaped handle 25 is pivotally supported. By pulling this handle 25, the cart 4 can be moved. Furthermore, support rods 26a and 26b for supporting the guide tube 17 are fixed to the brackets 24a and 24b.

The legs 23a and 23b of the truck 4 are provided with casters 2.
7 is installed. This caster 27 includes a bracket 27a rotatable about a vertical axis, and a wheel 7, which is a roller, mounted on the bracket 27a at a position offset from the vertical rotation axis so as to be rotatable about a horizontal rotation axis. In addition, a storage case 2 for storing the inspection equipment 6 is provided on the leg portion 23b.
8 is installed. This storage case 28 includes a plate-shaped body 29 extending obliquely upward, a bottomed case 30 that houses the inspection equipment 6 attached to the lower end of the plate-shaped body 29, and belts 31 and 32. When the inspection device 6 is not in use, the inspection device 6 is stored in the bottomed case 30, and the remaining portion is placed on the belt 31,
32.

An arm 33 whose one end is connected to the rotating shaft of the drums 2 and 3 is supported by the bracket 24a of the leg portion 23a. A handle 34 is attached to the other end of this arm 33. As is clear from FIG. 1, the drum 3 has one end coaxially provided on one flange 11a on the side opposite to the drum 2 (left side in FIG. 1). The flange 11c is provided at the other end of the drum 3. Cable 5b is cable 5a
It is wound around the drum 3 in the same winding direction.

The attachment hole 12 formed in the flange 11a is formed radially outward from the winding position of the cable 5b on the drum 3 and radially inward from the drum 2.

The guide tube 17 extends radially outward from the flanges 11a and 11b in parallel to the rotational axis of the drum 2, and a guide hole 21 is formed along the axial direction of the guide tube 17. The movable piece 18 is connected to the guide tube 17
The cable 5a is inserted through the cable 5a and wound on the drum 2.
contact the side of the

FIG. 6 is a perspective view showing a specific application example of the cable winding device 1 according to the present invention. cable 5
A is connected to the inspection equipment 6, and the cable 5b is connected to a power terminal provided in the camera controller 40. When inspecting the tube inner surface, when the handle 34 is operated and the cable 5a is sent out or wound up, the diameter D1 of the first drum 2 (first
(see figure) is much larger than the diameter D2 of the second drum 3 (see figure 1), the winding amount of the cable 5b is small, and therefore the cable 5b can sufficiently fulfill its function as a fixed side cable. I can do it.

In this way, the movable side cable 5a is wound around the first drum 2, which has a large diameter, and the fixed side cable 5b is wound around the second drum 3, which has a small diameter, and the winding direction is the same. So,
Without installing a slip ring like in the past,
Rotational twisting of the cable can be prevented.

Effects As described above, according to the present invention, rotational twisting of the cable can be prevented without using a slip ring. Further, since no slip ring is used, it is possible to realize low cost and also to prevent the generation of noise. In particular, according to the present invention, a pair of first flanges 11a, 11 provided at both ends of the first drum 2, respectively.
A mounting hole 12 is formed in one of the first flanges 11a on which one end portion of the second drum 3 is provided, and this mounting hole 12 is provided with a winding of the second cable 5b wound around the second drum 3. The mounting hole 12 is formed radially outward from the rotating position and radially inward from the first drum 2, and the mounting hole 12 is formed on the first flange 11a.
The outer surface of the first drum 2 is covered with a board 13 that is removably attached to the outer surface of the first drum 2.A terminal board 15 is fixed to the board 13 and protrudes from the inside of the first drum 2. Therefore, the ends of the first and second cables 5a, 5b are electrically connected inside the first drum 2. Therefore, if the first cable has, for example, a strong configuration suitable for inspection purposes, whereas the second drum has a flexible configuration that is easy to handle, such configurations may differ significantly. The first and second cables 5a, 5b can be electrically connected by the terminal plate 15, and since the terminal plate 15 is provided inside the first drum 2, the first and second cables cable 5
This will not interfere with a and 5b.

Moreover, since this board 13 is detachably attached to the outer surface of the first flange 11a, the board 13 can be taken out from the outside and the terminal board 15 can be removed.
The terminal board 15 can be inspected externally, and the work of connecting the first and second cables 5a and 5b to the terminal board 15 can be easily performed, and the effect of excellent workability is achieved. Such work is extremely important, especially when it has to be carried out under adverse conditions at the site.

Furthermore, according to the present invention, the guide cylinder 17 is provided on the trolley 4.
is fixed, and this guide cylinder 7 is radially outward of the first flanges 11a, 11b, and the first drum 2
The guide tube 17 extends parallel to the rotational axis of the drum 1, and the movable piece 18 is inserted into the guide tube 17, and the movable piece 18 contacts the side surface of the first cable 5a wound on the first drum 2, and is sprung by the spring 19. Therefore, even when the first cable 5a wound on the first drum 2 has a large strength suitable for inspection as described above, the first cable 5a on the first drum 2 is 5
Therefore, it is possible to wind the first cable 5a over a long distance on the first drum 2, and the winding work can be easily performed. can. This also makes it easy to handle the first cable 5a even when the first cable 5a has high strength and therefore relatively high rigidity in the field.
It becomes possible to smoothly wind up the cable 5a and also to smoothly supply it, which is also important in order to facilitate work under adverse conditions at the site.

[Brief explanation of the drawing]

1 is a side view of the cable winding device 1 according to the present invention, FIG. 2 is a front view of the cable winding device 1, FIG. 3 is a sectional view of the cable 5a, and FIG. 4 is a sectional view of the vicinity of the flange 11a. Figure 5 shows the movable piece 18
The front view of the vicinity and FIG. 6 are perspective views showing a specific application example of the cable winding device 1 according to the present invention. DESCRIPTION OF SYMBOLS 1... Cable winding device, 2... First drum, 3... Second drum, 4... Cart, 5a, 5b
... Flexible cable, 6 ... Inspection equipment, 7 ... Power supply, 11a, 11b, 11c ... Flange, 13
... Board, 15 ... Terminal board.

Claims (1)

[Claims for Utility Model Registration] A trolley 4 with wheels 27 provided at its lower part; a first drum 2; a pair of flanges 11a, 11b, one end of which is coaxial with the first flange 11a on the opposite side of the first drum 2, and a second drum 3 having a smaller diameter than the first drum 2; a second flange 11c provided at the other end of the second drum 3 and protruding radially outward from the second drum 3; and a first cable 5a wound around the first drum 2.
The second drum 3 includes a second cable 5b wound in the same winding direction as the first cable 5a, and the first and second drums 2 and 3 are rotatably supported by a trolley 4. The one first flange 11a has a mounting hole 12 located radially outward from the winding position of the second cable 5b and radially inward from the first drum 2.
is formed, and further, a substrate 13 is removably attached to the outer surface of the one first flange 11a and covers the attachment hole 12.
and is fixed to the substrate 13 so as to protrude inward from the first drum 2, and the first and second drums are fixed to the inside of the first drum 2.
A terminal board 15 that electrically connects the ends of the cables 5a, 5b, and a first flange 11a, 11 fixed to the trolley 4.
a guide tube 17 extending parallel to the rotation axis of the first drum 2 in the radial direction outward of b and having a guide hole 21 extending along the axial direction; movable piece 1 that contacts the side surface of the first cable 5a
8 is housed in the guide tube 17, one end is fixed to the guide tube 17, the other end is connected to the movable piece 17 through the guide hole 21, and the movable piece 18 is fixed to the guide tube 17 on one side in the axial direction. A cable winding device characterized in that it includes a spring 19 biasing the cable winding device.