JP2018002424A - Cable storage device and in-pipe camera system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable storage device provided with a manual handle excellent in operability and workability; and to provide an in-pipe camera system.SOLUTION: A cable storage device includes a frame 11 where a cable 3 is stored and a winding shaft 13 rotatably supported by the frame 11, and is provided with a cable drum 12 having a handle-mounting part 13a on its end part, transmission ratio shafts 15, 17 rotatably supported by the frame 11, connected to the winding shaft 13 at a prescribed transmission ratio and having the handle-mounting part on its end part, and a hand handle 19 having an engagement part flexibly attachable/detachable to/from the handle-mounting part of each of the shafts and manually rotating the shaft.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cable storage device suitable for application to a self-propelled in-pipe inspection camera.

  A self-propelled in-pipe inspection camera that inspects water pipes, sewage pipes, gas pipes, etc. has a self-propelled vehicle unit that self-propells in the pipe and a camera unit equipped with an electronic image sensor, and a cable storage device as a camera head It is connected to the tip of a long-distance cable wound around the cable drum and used for in-pipe inspection. In this in-pipe inspection, each time the camera head moves forward or backward in the tube so that there is no support for the in-pipe travel of the camera head, the cable wound around the cable drum is unwound and taken up as the camera head runs. Need to do. When this cable is unwound and wound manually by operating the handwheel handle (crank handle) provided in the cable storage device, the cable drum can be operated by operating the handwheel handle according to the running speed of the camera head and the amount of cable unwinding. However, with existing hand-held cable storage devices, the rotation ratio between the handwheel handle and the cable drum is always constant, making it difficult to master the adjustment work following changes in the speed of the camera head and cable feed amount. There was a problem in operability. In addition, the load applied to the handwheel handle varies greatly depending on the amount of cable that is fed out.For example, when winding a cable that is fed into the inside of the pipe, a large rotational force is required for the handing operation, and a smooth winding operation cannot be performed. was there.

JP-A-6-219650 Japanese Utility Model Publication No. 61-11170 Japanese Utility Model Publication No. 63-41398

  It is an object of the present invention to provide a cable storage device and an in-tube camera system that solves the above problems.

  A frame for storing the cable, a winding shaft rotatably supported by the frame, a cable drum having a handle mounting portion at the end of the winding shaft, and a handle mounting portion at the end. And a gear ratio shaft that is rotatably supported by the frame and connected to the take-up shaft at a predetermined speed ratio, and a fitting portion that is detachable from a handle mounting portion of the take-up shaft and the speed ratio shaft. The cable storage device is provided with a handwheel handle that rotates the winding shaft and the gear ratio shaft by hand.

  The cable storage device, a self-propelled camera head connected to the tip of a cable wound around a cable drum included in the cable storage device, and a circuit connected to the camera head via the cable are connected to the camera. An in-tube camera system including a control device for controlling a head is provided.

The side view which shows the structure of the tube camera system which concerns on embodiment. The side view which shows the structure of the cable storage apparatus which concerns on the said embodiment. The front view which shows the structure of the cable storage apparatus shown in FIG. The perspective view which shows the one part component of the cable storage apparatus shown in FIG. 2 and FIG.

  Embodiments will be described below with reference to the drawings.

  The configuration of the in-tube camera system according to this embodiment is shown in FIG. 1, the configuration of the cable storage device shown in FIG. 1 is shown in FIGS. 2 and 3, and the components of the main part of this cable storage device are shown in FIG. Yes.

  As shown in FIG. 1, the in-tube camera system includes a cable storage device 1 having a cable drum 12, a self-propelled camera head 5 connected to the tip of a cable 3 wound around the cable drum 12, and a cable 3. And a control device 7 for controlling the camera head 5.

  The cable 3 wound around the cable drum 12 of the cable storage device 1 transmits to the control device 7 a control signal line used for traveling control and photographing control in the tube of the camera head 5 and a video signal of the photographed tube image. A multi-core long-distance cable having a plurality of signal lines including a video signal line. A connector 3c for connecting a camera head is provided at the distal end of the cable 3. By connecting the camera head 5 to the connector 3c at the inspection site, the camera head 5 is controlled via the cable 3 and a slip ring described later. Circuit connected to the device 7.

  The camera head 5 includes a self-propelled vehicle unit 5a and a camera unit 5b mounted on the self-propelled vehicle unit 5a. The self-propelled vehicle unit 5a is driven and controlled by the control device 7 and self-travels (forward travel, reverse travel) in the direction of the arrow in the pipe E to be inspected. The camera unit 5 b is mounted on the self-propelled vehicle unit 5 a with the image pickup surface directed in the forward direction, and transmits the captured image to the control device 7 via the cable 3.

  The cable storage device 1 includes a frame 11 in which the cable 3 is stored, and a winding shaft 13 that is rotatably supported by the frame 11. A handle attachment portion 13 a is provided at one end of the winding shaft 13. The cable drum 12 and the handle attachment portions 15a and 17a at one end thereof are rotatably supported by the frame 11, and are connected to the take-up shaft 13 at a predetermined gear ratio. The handle attachment portions 13a, 15a, 17a of the take-up shaft 13 and the transmission ratio shafts 15, 17 have detachable fitting portions 19a, and the take-up shaft 13 and the transmission ratio shafts 15, 17 are rotated by hand. And a handwheel handle 19 to be operated.

  A more detailed configuration of the cable storage device 1 is shown in FIGS. 2 and 3, and some components of the cable storage device 1 are shown in FIG. Here, of the transmission ratio shafts 15 and 17, the transmission ratio shaft 15 is a speed increasing shaft whose speed ratio is an increase, and the speed ratio shaft 17 is a speed reduction shaft whose speed ratio is a speed reduction, and becomes a speed increasing shaft. The transmission ratio shaft 15 is constituted by the traverse shaft of the traverse mechanism 21.

  The traverse shaft 15, the cable guide 21, and the guide shaft 23 constitute a traverse mechanism 20 that winds the cable 3 around the winding shaft 13 of the cable drum 12 aligned in the axial direction (traverse direction). The handwheel handle 19 has a fitting portion 19a to be axially attached and a grip portion 19b for handwheel.

  FIG. 4 shows a fitting structure between the winding shaft 13, the traverse shaft 15, and the reduction shaft 17 and the handwheel handle 19, and a connection structure between the shafts 13, 15, and 17. In this embodiment, the fitting structure has quadrangular columnar handle attachment portions 13a, 15a, 17a having the same shape and dimensions, and quadrilateral holes that fit the handle attachment portions 13a, 15a, 17a. The above-mentioned connecting structure is realized by the plastic chains C1, C2 and the sprockets S1, S2, S3, S4. The winding shaft 13, the traverse shaft 15 and the speed reduction shaft 17 are rotatably supported by the cable storage device 1 in parallel at predetermined intervals, and are connected to each other at a predetermined speed ratio with the winding shaft 13 as a main shaft. ing. Here, the sprocket S1 provided on the take-up shaft 13 as the main shaft, the sprocket S2 having a larger number of teeth than the sprocket S1 and provided on the traverse shaft 15, and the sprockets S1 and S2 are wound around. The traverse shaft 15 is connected to the take-up shaft 13 as a speed-up shaft by the chain C1 formed. The sprocket S3 provided on the take-up shaft 13 and the number of teeth smaller than the sprocket S3 are connected to the speed-reduction shaft 15. A reduction shaft 15 is connected to the take-up shaft 13 by a sprocket S4 provided and a chain C2 wound between the sprockets S3 and S4.

  The winding shaft 13 has a slip ring 24 at the other end, and each signal line on the proximal end side of the cable 3 wound around the cable drum 12 is connected to the control device 7 via the slip ring 24 and a connector (not shown). Is connected to the circuit.

  When the pipe E is inspected, the connector 3c provided at the tip of the cable 3 wound around the cable drum 12 of the cable storage device 1 can self-run (forward travel, reverse travel) in the pipe E to be inspected. The camera head 5 is connected, the self-propelled camera head 5 is moved forward and backward in the pipe E under the control of the control device 7 to photograph the inside of the tube, and the image in the tube is observed on the control device 7 side. Alternatively, the inspection in the pipe E is performed by recording.

  When the pipe E is inspected, each time the camera head 5 moves forward and backward in the pipe E, the camera head 5 is wound around the cable drum 12 in accordance with the travel of the camera head 5 so that the travel of the camera head 5 is not supported. The cable 3 is manually unwound and operated manually by operating the handle (crank handle) 19.

  In this cable 3 unwinding and winding operation, the shaft on which the handwheel handle 19 is attached and the traverse shaft (main shaft) 13 and the traverse according to fluctuations in the rotational load of the cable drum 12 depending on the amount of cable 3 being unrolled and the environment at the inspection site. The shaft (speed increasing shaft) 15 or the speed reducing shaft 17 is selected. For example, when a large rotational load is applied to the cable drum 12, the fitting portion 19 a of the handwheel handle 19 is fitted to the handle mounting portion 17 a of the speed reduction shaft 17, and the cable drum is connected to the cable drum 12 via the speed reduction shaft 17. By rotating 12, it is possible to easily and smoothly carry out the operation of unwinding and winding the cable 3 with the handwheel 19 while the rotational load is reduced. When the rotational load applied to the cable drum 12 is small, the fitting portion 19a of the handwheel handle 19 is fitted to the handle mounting portion 15a of the traverse shaft 15, and the cable drum 12 is passed through the traverse shaft 15 by the handwheel handle 19. By rotating the, the winding operation of the cable 3 can be carried out efficiently and quickly.

  As described above, the traverse shaft 15 and the speed reduction shaft 17 serving as the speed increasing shaft are used as the handle mounting shaft to which the handle 19 can be attached and detached, with the winding shaft 13 as the main shaft, and the mounting shaft of the hand driving handle 19 can be arbitrarily selected. By doing so, the operation of unwinding and winding the cable 3 by the handwheel 19 can always be easily and efficiently performed according to the unwinding amount of the cable 3 and the environment of the inspection site.

  In the above-described embodiment, the square columnar handle attachment portions 13a, 15a, 17a having the same shape and size, and the fitting portion 19a having a quadrangular hole to be fitted to the handle attachment portions 13a, 15a, 17a. To realize a fitting structure between the winding shaft 13, the traverse shaft 15 and the speed reduction shaft 17 and the handwheel handle 19, and the connecting structure is made of plastic chains C1, C2 and sprockets S1, S2, S3, S4. Although the connection structure between the shafts 13, 15, and 17 is realized, the present invention is not limited to this structure. For example, the handle attachment portions 13a, 15a, and 17a have different shapes, and the handle attachment portions 13a, 15a, and 17a have different shapes. A fitting structure in which a plurality of fitting portions 19a matching the above are hand-turned and provided on the handle 19 or a fitting portion 19a of the hand-drawing handle 19 is formed into a polygonal columnar projecting shape. A fitting structure in which recesses into which the protrusions are fitted may be provided in the handle attachment portions 13a, 15a, 17a, and a connection structure between the shafts 13, 15, 17 using the plastic chain and the sprocket described above. For example, a connection structure using a timing belt and a toothed pulley, or a connection structure using other belt hooks or gears may be used. In the above-described embodiment, the traverse shaft 15 is used as a speed increasing shaft and the other speed change shaft 17 is used as a speed reducing shaft. However, for example, the traverse shaft 15 is used as a speed reducing shaft and the other speed change shaft 17 is used as a speed up shaft. It may be a structure or a connecting structure having either a speed reducing shaft or a speed increasing shaft, and in short, the constituent elements can be modified and embodied without departing from the gist of the present invention. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Cable storage apparatus, 3 ... Cable, 5 ... Camera head, 7 ... Control apparatus, 11 ... Frame, 12 ... Cable drum, 13 ... Winding shaft, 15 ... Traverse shaft (acceleration shaft), 17 ... Deceleration shaft 17 , 13a, 15a, 17a ... handle attaching portion, 19 ... hand turning handle, 19a ... fitting portion, 20 ... traverse mechanism.

Claims (9)

A frame in which the cable is stored;
A cable drum having a winding shaft rotatably supported by the frame, and having a handle mounting portion at an end of the winding shaft;
A gear ratio shaft that has a handle attachment portion at an end thereof, is rotatably supported by the frame, and is coupled to the winding shaft at a predetermined gear ratio;
A handwheel handle that has a detachable fitting portion on a handle attachment portion of the winding shaft and the transmission gear ratio shaft, and rotates the winding shaft and the gear ratio shaft manually.
A cable storage device comprising:   2. The cable storage device according to claim 1, wherein the speed ratio shaft is a traverse shaft of a traverse mechanism that winds the cable in alignment with the winding shaft in the axial direction.   The speed ratio shaft has a speed increasing shaft with the speed ratio being increased, and a speed reducing shaft with the speed ratio being decelerated, and one of them is aligned with the winding shaft in the axial direction. The cable storage device according to claim 1, wherein the cable storage device is a traverse shaft of a winding traverse mechanism.   The cable storage device according to any one of claims 1 to 3, wherein a handle mounting portion of the cable drum and a handle mounting portion of the transmission ratio shaft have the same structure.   The cable storage device according to any one of claims 1 to 3, wherein the shafts are interlocked with each other by a sprocket attached to the shafts and a chain wound around the sprockets.   The cable storage device according to claim 3, wherein the traverse shaft is the speed increasing shaft.   The cable storage device for an in-pipe inspection camera according to claim 1, wherein the cable has a plurality of signal lines, and the winding shaft has a slip ring connected to the signal lines in a circuit. The cable storage device according to any one of claims 1 to 7,
A self-propelled camera head connected to the tip of the cable wound around the cable drum of the cable storage device;
A controller connected to the camera head via the cable to control the camera head;
An in-tube camera system comprising:   The cable has a signal line for transmitting an image taken by the camera head, and a signal line for controlling the camera head to run freely, and a connector connected to the camera head at the tip of each signal line. The in-tube camera system according to claim 7.

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