JP2823684B2 - Signal transmission equipment - Google Patents

Description

The present invention relates to a signal transmission device, and more particularly, to a signal transmission device for transmitting a signal between a rotating part and a fixed part.

[Conventional technology]

Conventionally, for transmitting a signal between a rotating part and a fixed part, a method of transmitting and receiving a signal using a transmitting antenna and a receiving antenna is generally used.

[Problems to be solved by the invention]

However, this method has a problem when accurate signal transmission is required without being able to avoid mixing of noise from outside and becoming a noise source.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a signal transmission device in which external noise is less mixed in signal transmission between a rotating unit and a fixed unit.

[Means for solving the problem]

In order to solve the above-mentioned problem, the present invention is configured as follows.

 FIG. 1 is a diagram illustrating the principle of the present invention.

In FIG. 1, a signal transmission device 100 according to claim 1
In a hollow electromagnetic shield 103, a pair of two ring-shaped conductors 101 and 102, each having a lead wire drawn out, are coaxially opposed to each other at a predetermined distance from each other, and one of the rings The conductor is provided so as to be rotatable in the circumferential direction about the axis.

According to a second aspect of the present invention, there is provided a signal transmission apparatus according to the first aspect.
In 100, the pair of two ring-shaped conductors have substantially the same diameter as each other, and are arranged to face each other at a predetermined interval in the axial direction.

According to a third aspect of the present invention, there is provided the signal transmission apparatus according to the first aspect.
In 100, the pair of two ring-shaped conductors have different diameters from each other, and are arranged correspondingly at predetermined intervals in a radial direction.

According to a fourth aspect of the present invention, there is provided a signal transmission apparatus according to the first aspect.
In 100, the ring-shaped conductor is formed in an annular plate shape.

According to a fifth aspect of the present invention, there is provided a signal transmission apparatus according to the first aspect.
In 100, the ring-shaped conductor is configured in an annular linear shape.

According to a sixth aspect of the present invention, the rotating shaft, a first electromagnetic shield attached to the rotating shaft, the first electromagnetic shield rotating interlockingly about the center of the rotating shaft, and the first electromagnetic shield are combined. Forming a hollow electromagnetic shield, and a second electromagnetic shield that does not rotate in conjunction with the rotation axis, and a ring-shaped conductor, provided in the hollow electromagnetic shield, and the rotation shaft A first conductor provided so as to rotate in conjunction with the center as a center of rotation, and a ring-shaped conductor provided in a hollow electromagnetic shield and coaxial with the first conductor at a predetermined distance from each other; A second conductor that is disposed above and that does not rotate in conjunction with the rotation axis and is connected to the first conductor, is insulated from the first electromagnetic shield, and interlocks with the rotation axis; First conductor from rotating part Sends a signal, or a first conductor for sending signals to the rotatable portion of a first conductor, connected to the second conductor, and the second electromagnetic shield is insulated,
And a second conductor for transmitting a signal from the fixed portion that does not rotate in conjunction with the rotating shaft to the first conductor or transmitting a signal from the second conductor to the fixed portion.

[Action]

According to the first aspect of the present invention having the above-described configuration, the antenna surfaces of the ring-shaped conductors 101 and 102 from which the respective conductors are drawn out have the same ring shape, and their respective axes coincide with each other. Also, both are arranged facing each other at a predetermined interval.
The two ring-shaped conductors are electromagnetically shielded by an electromagnetic shield 103. This ring-shaped conductor 10
One or both of 1, 102 are rotated, and a signal is transmitted from one to the other via a conductor. In this case, the antenna surfaces face each other, and the shape of the antenna surface does not change even when rotated. It is also electromagnetically shielded. Therefore, it is possible to perform good signal transmission without mixing external noise.

The arrangement of the pair of two ring-shaped conductors may be arranged so as to overlap at a predetermined interval in the axial direction, or the same result may be obtained even if they are arranged in a double ring shape in the radial direction. Can be In addition, the same effects as described above can be obtained even when the shape is an annular shape or an annular line.

Further, according to the structure of the sixth aspect of the invention, there is no noise from the outside and no twisting of each conductor due to rotation.

〔Example〕

Next, a preferred embodiment of the present invention will be described with reference to the drawings.

FIG. 2 shows a configuration of a tube inspection system using an embodiment of the present invention. The tube inspection system 200 includes a tube insertion unit 1, a rotary tube inspection machine 2, a tube removal unit 3, a transport device 4,
And an emergency discharge conveyor 5.

The tube insertion section 1 has an accumulation conveyor 6, a pusher 7, and a tube insertion jig 8. The rotary tube inspection machine 2 includes a rotation inspection table 12, a star wheel 13 that is also used for discharging defective products, a chute 14 for discharging defective products, and a defective product pool 15. Tube take-out part 3
Are a stopper 19, a stopper 21, a tube pick-and-place 20, a pitch correction jig 22, a box transport conveyor 23, box holding devices 24a and 24b, and box stoppers 25a and 25b.
And a tube accumulation conveyor 26 and a tube boxing device 27
And The transfer device 4 includes a transfer conveyor 9 and
The timing screw 10, the star wheel 11, the rejected and used star wheel 13, the splicing screw 16, the sorting star wheel 17, the non-defective transport conveyor 18, the empty holder transport conveyor 29, and the empty holder transport conveyor 30, merge with each other. It has an apparatus 31 and an empty holder transport conveyor 32.

Next, the operation of the tube inspection system 200 will be described.

The laminate tube T is transported from the previous step A and is accumulated by the accumulation conveyor 6. After this, pusher 7
Are extruded all at once by a predetermined number, and are placed on a holder H on a conveyor 9 by a tube insertion jig 8. The laminated tube T is placed on the holder H, and the rotary tube inspection machine 2 is moved by the conveyor 9.
Transported in the direction of When the holder H reaches the vicinity of the rotary tube inspection machine 2, the holders H are advanced at predetermined intervals by a screw-shaped timing screw 10, and the rotary tube inspection machine 2 is rotated by a star-shaped star wheel 11. It is placed on the inspection table 12. The rotation inspection table 12 rotates clockwise in the figure, and inspects the inside of the laminate tube T while rotating. The detailed configuration and operation of the rotary tube inspection machine 2 will be described later. As a result of the inspection, when it is determined that the product is defective, the star-shaped defective product discharging / combining star wheel 13 includes:
Only the defective product laminate tube T is taken out upward and discharged, leaving only the holder H, and is accumulated in the defective product pool 15 via the defective product discharge chute 14. The non-defective laminated tube T and the holder H and the defective laminated tube T and the remaining holder H alone are conveyed to the distribution star wheel 17 by the screw-shaped joining screw 16. The sorting star wheel 17 transports a non-defective laminate tube T and a holder H to a non-defective conveyor.
The empty holder on which the defective laminate tube T is discharged is placed on the empty holder transport conveyor 30 and sorted. The good-quality laminate tube T and the holder H transported by the non-defective product transport conveyor 18 are transported to the tube take-out unit 3 by the non-defective product transport conveyor 18. In the tube take-out section 3, first, the stopper 21
Then, a predetermined number of the laminated tubes T and the holders H are stopped by the stopper 19, and only the laminated tubes T are taken out from the non-defective product conveyer 18 by the tube pick-up and place 20. Then
The pitch of these laminated tubes T is corrected by the pitch correcting jig 22 and the tube accumulating conveyor 26
Thereby, it is accumulated near the tube box packing device 27. On the other hand, a box transport conveyor 23 is provided below the stacking position of the laminate tubes T, and the empty box E is transported from the previous process B. The empty box E is a box holding device 24a, 24b and a box stopper 25a, 2
It is stopped by 5b and is transferred to the lower part of the tube boxing device 27 as appropriate. The tube box packing device 27 packs the laminated laminate tubes T into empty boxes E by a predetermined number.
The box that has been packed is conveyed to the next step C by the box conveyer 23. The holder H from which only the laminate tube T is taken out by the tube take-out pitch and place 20 is conveyed to the merging device 31 by the empty holder conveying conveyor 29. The empty holders sorted by the sorting star wheel 17 are also conveyed to the merging device 31. The merging device 31 has two timing screws, and these empty holders are merged in a line and placed on the empty holder transport conveyor 32. The empty holder transport conveyor 32 transports the empty holder to the tube insertion unit 1 and connects the empty holder to the transport conveyor 9.

In this way, the inside of the laminated tube T can be automatically inspected during the manufacturing process of the laminated tube T.

Next, a configuration of a rotary tube inspection machine using an embodiment of the signal transmission device according to the present invention will be described with reference to FIGS. 3, 4, and 8. FIG. The rotary tube inspection machine 2 includes a base 35, a motor 36, and a rotating shaft 37.
A rotation inspection table 12, a cam 46, a cam follower 47, a holder elevating rotation shaft 48, a centering jig 38, an in-tube inspection device 39, a camera selector 43 (FIG. 4), a mixer 44, The antenna unit 45, which is a signal transmission device, a rotating resolver 49, a fixed resolver 50, and a light amount checker 51 (fourth
), A cam positioner 87 (FIG. 8), and a discriminating device 84.
(FIG. 8).

A fixed shaft (not shown) is provided on the base 35, and a tubular rotating shaft 37 is provided so as to share an axis with the fixed shaft and to cover the fixed shaft. The rotating shaft 37 is configured to be rotationally driven by a motor 36. In order to measure the angular position between the fixed axis and the rotating axis, the rotating resolver 49 and the fixed resolver are used.
50 and are provided. The rotation inspection table 12 is connected to a rotation shaft 37, and rotates with the rotation of the rotation shaft 37. A holder H can be placed on the rotation inspection table 12. The holder H is moved up and down and rotated by a holder elevating rotary shaft 48. The elevating operation of the holder elevating rotary shaft 48 is performed by a cam 46 and a cam follower 47 provided at the lower end of the holder elevating rotary shaft 48.
Done by The squeeze port side of the laminate tube T can be inserted into the holder H. A centering jig 38 for holding the tail side of the laminate tube T in a circular shape is supported above the holder H. In-tube inspection device 39 for inspecting the inside of laminate tube T
Has a tube insertion section 40, a borescope 41, and a CCD camera 42. The borescope 41 includes a borescope main body 52 and a borescope insertion section 53. The tube insertion section 40 includes a borescope insertion section 53, a light emitting diode section 54, and a photo sensor section 55. Of these, the borescope insertion part 53 is a laminate tube T
In the figure, the inner bottom side, that is, the squeeze port side is mainly inspected, and the light emitting diode unit 54 and the photo sensor unit 55 are mainly inspected on the inner side surface of the laminate tube T. The rotary tube inspection machine 2 has 12 in-tube inspection devices 39
, And twelve cam followers 47 and holder elevating rotary shafts 48 are also provided. These numbers are not limited to 12, and may be other numbers. Each in-tube inspection device 39 is connected to a camera selector 43 by a lead wire, and the camera selector 43 is connected to a mixer 44. Mixer 44
Is connected to the antenna unit 45. The antenna unit 45 is connected to the discriminating device 84.

Next, the operation of the rotary tube inspection machine 2 will be described with reference to FIGS.

In FIG. 4, a laminate tube T is attached to a holder H.
It is placed on the top and transported to the star wheel 11 by the transport conveyor 9 or the like. The star wheel 11 takes the laminated tube T together with the holder H onto the rotary inspection table 12 of the rotary tube inspection machine 2. After being taken on the rotating inspection table 12, the holder H moves up and down according to the cam curve of the cam 46 as the holder elevating rotary shaft 48 moves up and down, and intermittently rotates around the axis of the holder elevating rotary shaft 48. I do. That is, as shown in FIG. 5, the rotation is performed at the inspection position while revolving in the rotation direction of the rotation inspection table 12, and at this time,
At points P ₁ , P ₂ , P ₃ and P ₄ , the rotation is temporarily stopped for a predetermined time. Laminated tube T by raising holder H
Also rises, and the in-tube insertion portion 40 of the in-tube inspection device 39 is inserted into the inside of the tube held in a circular shape by the centering jig 38 (FIG. 4). As described above, in a state where the in-tube insertion portion 40 is inserted into the tube, the laminated tube T performs intermittent rotation between the points P _{1 to} P ₄ , thereby using the in-tube inspection device 39. Inspection of the inner bottom surface and inner surface of the tube can be performed in the section (FIG. 5). This intermittent rotation corresponds to a relative planar movement between the cylindrical body and the imaging means. 1
When the inspection of one tube is completed, the defective laminate tube T is discharged by the defective discharge / star wheel 13 as described above, and the non-defective laminate tube T is transported in the direction of the tube take-out section 3. In addition, before the insertion portion 40 in the tube is inserted into the laminate tube T, the light amount of the light emitting portion is checked by the light amount checker 51, and the result is reflected at the time of data processing.
Further, when the light amount is equal to or less than the reference value, an alarm can be issued to replace parts.

Next, a more detailed configuration of the insertion portion in the tube will be described with reference to FIGS. 6 and 7. FIG.

FIG. 6 (A) shows a cross section in the II direction of the in-tube insertion portion 40 inserted into the laminate tube T. FIG. 6C is a cross-sectional view in the II-II direction, and FIG. 6D is a cross-sectional view in the III-III direction.

The light-emitting diode unit 54 is attached to the borescope 41 via a joint fitting 56 and a bolt 57, and the light-emitting diode unit 54 and the photo sensors 55a, 55b, 55
c, 55d, 55e, and 55f are attached.

FIG. 6B is a sectional view of the borescope insertion portion 53. The borescope insertion section 53 is provided with a lens section 60 for capturing an image inside a stainless steel tube 58, and a light source fiber section 59 including a thin glass fiber is provided around the lens section 60. In the figure, the end face S of the borescope insertion portion 53 is perpendicular to the axis of the borescope insertion portion 53, but may be obliquely cut so as to have a certain angle with respect to the axis. In this case, the field of view is expanded not only vertically downward but also obliquely. In addition, borescope insertion section 53
Is eccentric from the axis of the laminate tube T, and the positional relationship is shown in FIGS. 7 (A) and 7 (C). That is, the inspection area F ₁ of the bore scope insertion portion 53 in this case is 4 minutes circular portion excluding the square of the camera field mask portion (hatched portion). Since the laminate tube T rotates intermittently as shown in FIG. 5 and temporarily stops at points P ₁ , P ₂ , P ₃ , P ₃ , and P ₄ , the point P ₁
Of it can check the inspection area F ₁ in FIG. 7 (C) when the stop, at the time of stopping point P ₂ it is possible to inspect the inspection area F _2. Hereinafter, an inspection region F ₃ when it stops the point P ₃ in the same manner, the inspection area F ₄ when the stop point P _4,
Each can be inspected. In this manner, the inspection area is divided as shown in FIGS. 7A and 7C, and the image is taken and inspected by approaching the inner bottom surface, thereby obtaining the images shown in FIGS. 7B and 7D. As compared with the case where the borescope insertion portion 53 is positioned at the axis of the laminate tube T as a single inspection area, the resolution can be further improved, and defects such as finer contaminants and flaws can be detected. It becomes possible. The division of the inspection area is not limited to four divisions,
Other numbers are acceptable.

On the other hand, the light emitting diode unit 54 is a laminate tube T
It has a length that covers from the inner bottom surface to the upper opening surface, and can illuminate the inner surface from the upper end to the lower end.
The three photo sensors 55a to 55f are provided on both sides of the light emitting diode unit 54, and are provided so that the inspection areas overlap as shown in FIG. 6 (C).
With this configuration, the photo sensors 55a to 55a
f. The inner surface can be inspected during the period when the laminate tube T is rotating, that is, during the period excluding the period when the laminate tube T is stopped at points P ₁ , P ₂ , P ₃ , and P ₄ in FIG. Here, the photo sensors 55a to 55f may be provided in one row, or may be a photoelectric conversion element other than the photo sensor, for example, a CCD element or the like.

Next, processing of the inspection information detected by the in-tube inspection device 39 will be described. The image information of the inner bottom surface of the laminate tube T detected by the CCD camera 42 is converted into a video signal, and the image information of the inner surface of the laminate tube T detected by the photo sensor unit 55 is converted into a sound signal, and the two are mixed. Is transmitted to the outside to determine whether or not a defect is present. FIG. 8 is a block diagram showing the flow of image information processing on the inner bottom surface of the laminate tube T detected by the CCD camera 42. Image processing of the inner surface of the laminate tube T can be performed similarly.

FIG. 8 is roughly divided into a rotating block 85 and a fixed block 86. The rotating block 85 has 12 CCD cameras 42a, 42
b, 42c, 42d, 42e, 42f, 42g, 42h, 42i, 42j, 42k, 42
l, camera selector 43, mixer 44, antenna section 45
, The electromagnetic shield cover 72 and the transmitting antenna 74, the cam positioner 87, and the rotating resolver 49.

The fixed block 86 includes an electromagnetic shielding cover 73 and a receiving antenna 75 of the antenna unit 45, a distributor 88, and a tuner 89.
a, 89b, 89c, 89d, 89e, 89f, 89g, 89h, controllers 90A, 90B, monitors 91a, 91b, and a cam positioner 92
, A failure determination circuit 93, and a fixed resolver 50. Here, a distributor 88, tuners 89a to 89h, controllers 90A and 90B, monitors 91a and 91b, a cam positioner
The 92 and the failure determination circuit 93 constitute a determination device.

Image information of the inner bottom surface of the laminate tube T from each of the CCD cameras 42a to 42l is obtained from the angular position of the rotary inspection table 12 detected by the rotary resolver 49 and the height position of the cam follower 47 detected by the cam positioner 87. The camera selector 43 specifies a camera to be taken in, selects and takes in only image information from the camera, and transmits it to the mixer 44. Fifth
As is clear from the figure, a certain laminated tube T
Upon reaching the P ₄ are already point P _3, the point P _2, since the subsequent laminated tubes T to the point P ₁ has reached, the image information simultaneously from four cameras are captured. The mixer 44 mixes these four pieces of image information and outputs them to the transmission antenna 74. The mixed image information is transmitted from the transmitting antenna 74 to the receiving antenna 75. Transmit antenna 74 and receive antenna
75 is an electromagnetic shield cover 72 and an electromagnetic shield cover
Electromagnetically shielded by 73. The mixed image information received by the receiving antenna 75 is divided into frequency bands by the distributor 88 and sent to the tuners 89a to 89h to detect information signals. Tuner of each tuner 89a-89h
Information signals from 89a to 89d are sent to controller 90A. The signals are sent to the information signal controller 90B from the tuners 89e to 89h. Controllers 90A and 90B are monitors 91a,
Monitored at 91b. The cam positioner 92 specifies the camera number based on the detected angular position of the rotation inspection table 12 and the height position of the cam follower 47 detected by the cam positioner 87, and transmits the camera number to the defect determination circuit 93. A select signal is issued to 90A or the controller 90B to select a signal to be sent to the defect determination circuit 93 from among information signals from the tuners. The failure determination circuit 93 determines whether or not there is a failure based on the image information signal from each camera and outputs the result to the outside. The determination of good or bad is made, for example, by binarizing the image information signal based on brightness and determining the number of pixels in the dark area.

An example of the configuration of the antenna unit 45 according to an embodiment of the present invention will be described with reference to FIGS. 9 and 10. FIG. Here, a hatched portion shows an example of a fixed block. Antenna part 45
Is composed of a transmitting antenna 74 and a receiving antenna 75, an electromagnetic shielding cover 72 and an electromagnetic shielding cover 73 for electromagnetically shielding these, mounting brackets 76 and 77 of each antenna, and lead wires 81 and 82 for supplying signals. Have. Here, the transmitting antenna 74 and the receiving antenna correspond to a pair of ring-shaped conductors. The electromagnetic shield covers 72 and 73 constitute an electromagnetic shield. The lead wires 81 and 82 correspond to conductive wires. As shown in FIG. 9, the transmitting antenna 74 is mounted on the rotating block side, and the receiving antenna 75 is mounted on the fixed block side. The transmitting antenna 74 and the receiving antenna 75 are in a non-contact state and always face each other even when the rotating block rotates, so that information signals can be transmitted and received stably, and the electromagnetic shielding cover 72 and the electromagnetic shielding cover 73 Because it is shielded, it is not affected by external noise.

The antenna unit according to the present invention may have a configuration as shown in FIG. FIG. 11 (A) shows a side view of the antenna section, and FIG. 11 (B) shows FIG. 11 (A).
2 shows a cross section of FIG. The antenna unit includes a rotating part 115 attached to a rotating shaft, a fixed part 114 immovable with respect to the rotating shaft, and a thrust adjusting collar 119 for applying a thrust (pressing) load to the fixed part. The rotating part 115 and the fixed part 114 are formed of a conductor, and constitute an electromagnetic shield. The rotating part 115 and the fixed part 114 have a ring-shaped groove formed around the axis of the rotating shaft 37 inside thereof, and the groove on the rotating part 115 side and the groove on the fixed part 114 side overlap each other. ing. On the bottom surface of each ring-shaped groove, a ring-shaped receiving antenna 111 is provided on the fixed part 114 side, and a ring-shaped transmitting antenna 112 is also provided on the rotating part 115 side,
The receiving section 111 and the fixed section 114 are insulated by an insulating section 113. The transmission antenna 112 and the rotating unit 115 are similarly insulated. As described above, the receiving antenna 111 and the transmitting antenna 112 face each other with the air gap therebetween. here,
The receiving antenna 111 and the transmitting antenna 112 correspond to a pair of ring-shaped conductors. A signal is input to the transmitting antenna 112 through a BNC connector 117 and a conductor. Also receive antenna 1
The signal from 11 is output from the conductor and the BNC connector 116.
The rotating part 115 is fixed to the rotating shaft 37 by a shaft fixing bolt 118, and a thrust load adjusting collar 119 that rotates with the rotation of the rotating shaft 37 is fixed to the rotating shaft 37 by an adjusting screw 120, and the rotation of the rotating shaft 37 It rotates with. A pressurizing flat spring 121 is provided between the thrust load adjusting collar 119 and the fixing portion 114, whereby the fixing portion 114 is always pressed against the rotating portion 115. Therefore, the rotating part 115
Rotates while sliding with respect to the fixed portion 114.
In addition, since the flat spring for press 121 slides and rotates between the collar 119 for adjusting the thrust load and the fixed portion 114, the portions 122 and 123 in contact with the spring are provided with dry metal. Similarly, since the rotating shaft 37 and the fixed portion 114 also perform sliding rotation, a dry metal 124 is also provided on the rotating shaft side of the fixed portion 114.

With this configuration, the same effect as that of the antenna unit 45 can be obtained.

FIG. 9 shows an example of the configuration of the rotating resolver 49 and the fixed resolver 50. A resolver is a device that gives angular position information such as a rotation axis by an electric signal. As shown, the rotating resolver 49
Is a resolver for detecting angular position information on the rotating block side, and the resolver body is attached to the rotating block side. The shaft 71, which is the reference for rotation, has gears 69, 70a, 7
It is configured so that 0b indicates the same angular position as the fixed shaft 65. That is, the gear 70b is a planetary gear, and the gear 6b
9 and the number of teeth of the gear 70a are configured to be equal. With this configuration, the shaft 71 always shows the same angular position as the fixed shaft 65. Further, the fixed resolver 50 is a resolver for detecting angular position information on the fixed side, and the resolver body is attached to the fixed block side. The rotation of the rotation shaft 80 is transmitted from the rotation block unit by the gear 78 and the gear 79.

The motor 36 is attached to the lower shaft 65 by a motor base 66, and the rotating block is rotated by gears 67 and 68.

Fig. 12 shows the camera and controller at each angular position.
It is a figure which shows the operation situation of 90A and 90B, and the number of each column is 1
Indicates the ON state, and 0 indicates the OFF state.

FIG. 13 is a diagram showing transition of a controller used for each camera.

FIG. 14 is an operation timing chart of the camera and the controller.

With such an operation, the number of expensive controllers can be reduced, and a small number of controllers can be operated efficiently.

Note that the present invention is not limited to the above embodiment.

In the above embodiment, the example in which the transmitting antenna and the receiving antenna, which are ring-shaped conductors, are in the shape of a circular plate has been described. Alternatively, the shape may be a disk or a straight line. Furthermore, it may be a double ring shape that overlaps in the radial direction. This is because the action and effect do not change.

In the above-described embodiment, the cylindrical laminated tube T
Is rotated intermittently by the holder H, and the CCD camera 42 itself is fixed to the rotating block. However, the CCD camera 42 itself rotates intermittently, and the laminate tube T itself may not rotate. . However, in this case, a transmitting / receiving antenna (for example, a small antenna unit 45) for transmitting / receiving between the camera side rotating the image signal of the CCD camera 42 and the rotating block fixed to the camera is provided. It must be provided for each camera. Also, CC
The manner of movement of the D camera 42 is not limited to a rotating (spinning) movement, but may be any other manner of movement, such as a zigzag movement, as long as the entire inner bottom surface can be covered.

In this embodiment, the laminate tube T is rotated intermittently, and the quality is inspected by an image at rest.
In this case, it is possible to continuously rotate the image information, take in the image information, and perform the determination. It is the same as the above that the way of movement of the laminate tube may be a zigzag movement instead of the rotation movement.

In the present embodiment, the laminate tube T also makes a revolving motion. By doing so, it is possible to install the inspection positive in a small space in the middle of the direct production line. However, this is not necessarily limited to the orbital motion, and may be a linear motion or the like as long as the camera can be intermittently rotated while moving in one direction and the camera can be inserted.

Further, in the present embodiment, the laminate tube T is moved up and down to insert the CCD camera 42 into the inside of the laminate tube T. This is, however, conversely, the CCD camera 42 is moved up and down and inserted into the laminate tube T. You may do it.

Further, in the above-described embodiment, the description has been given of the laminated tube T which is a cylindrical body whose bottom end is narrowed in a tapered shape and has a take-out port in a part thereof, but this is like a bottle or a can with one end closed. It may be a bottomed cylindrical body.

〔The invention's effect〕

As described above, according to the present invention, there is an advantage that signal transmission with less external noise mixing can be performed between the rotating unit and the fixed unit, and the signal transmission accuracy can be improved.

[Brief description of the drawings]

FIG. 1 is a view for explaining the principle of the present invention, FIG. 2 is a diagram showing a configuration of a tube inspection system using a rotary tube inspection machine according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. 4 and 5 are diagrams illustrating the operation of the rotary tube inspection machine of FIG. 3, and FIG. 6 is a diagram illustrating the inside of a tube inserted into a laminate tube. FIG. 7 is a diagram illustrating an insertion portion, FIG. 7 is a diagram illustrating a camera field of view of an insertion portion in a tube, FIG. 8 is a block diagram illustrating image information processing of a bottom surface in a laminate tube detected by a CCD camera, and FIG. And FIG. 10 shows an example of the configuration of the antenna unit, FIG. 11 shows another example of the configuration of the antenna unit, and FIG. 12 shows the operation of the CCD camera and the controller. Diagram showing the situation, Fig. 13 FIG. 14 is a diagram showing transition of a controller used for each camera, and FIG. 14 is an operation timing chart of the camera and the controller. DESCRIPTION OF SYMBOLS 1 ... Tube insertion part 2 ... Rotary tube inspection machine 3 ... Tube take-out part 4 ... Conveyer 5 ... Emergency discharge conveyor 6 ... Collecting conveyor 7 ... Pusher 8 ... Tube insertion jig 9 ... … Conveyor 10… Timing screw 11… Star wheel 12… Rotation inspection table 13… Star wheel for combined use of discharging defective products 14… Chute for discharging defective products 15… Pool pool 16 …… Splice screw 17… Sorting star wheel 18… Conveyor for non-defective products 19… Stopper 20… Pick and place for taking out tube 21… Stopper 22 …… Pitch correction jig 23 …… Conveyor for box transfer 24a, 24b …… Box holding device 25a, 25b… … Box stopper 26 …… Tube accumulation conveyor 27 …… Tube box packing device 29, 30 …… Empty holder conveyor 31 …… Merging device 32 …… Empty holder conveyor 35 … Base 36 …… Motor 37 …… Rotating axis 38 …… Centering jig 39 …… Tube inspection device 40 …… Tube insertion part 41 …… Borescope 42, 42a to 42l …… CCD camera 43 …… Camera Selector 44 Mixer 45 Antenna 46 Cam 47 Cam follower 48 Holder elevating rotary shaft 49 Rotating resolver 50 Fixed resolver 51 Light intensity checker 52 Borescope body 53 Bore Scope insertion section 54 Light-emitting diode section 55 Photosensor section 55a to 55f Photosensor 56 Joining bracket 57 Bolt 58 Stainless steel tube 59 Fiber section for light source 60 Lens section 65 … Fixed shaft 66… Motor base 67, 68, 69, 70a, 70b… Gear 71… Shaft 72, 73… Electromagnetic shield cover 74 …… Transmit antenna 75 …… Receive antenna 76, 77… Mounting bracket 78, 79 ... gear 80 ... rotating shaft 81, 82 ... Lead wire 84 ... Discriminator 85 ... Rotating block 86 ... Fixed block 87 ... Cam positioner 88 ... Distributor 89a-89h ... Tuner 90A, 90B ... Controller 91a, 91b ... Monitor 92 ... Cam Positioner 93 Defect determination circuit 100 Signal transmission device 101 Ring-shaped conductor 102 Ring-shaped conductor 111 Receiving antenna 112 Transmitting antenna 113 Insulating part 114 Fixed part 115 Rotating part 116 BNC connector 117 BNC connector 118 Shaft fixing bolt 119 Thrust load adjustment collar 120 Adjustment screw 121 Flat springs 122, 123, 124 for pressurization Dry metal 200 … Tube inspection system E …… Empty box F ₁ …… Inspection area H …… Holder P …… Cylindrical body P _i … Tube position on the rotary inspection table S …… Borescope insertion section end face S _v …… Video signal T …… Laminated tube

Claims (6)

(57) [Claims] 1. A pair of two ring-shaped conductors, each of which has a lead wire drawn out, are coaxially opposed to each other at a predetermined interval in a hollow electromagnetic shield body, and one of the ring-shaped conductors is provided. A signal transmission device, wherein a body is provided so as to be rotatable in a circumferential direction about the axis. 2. The signal transmission device according to claim 1, wherein said pair of two ring-shaped conductors have substantially the same diameter as each other, and are arranged facing each other at a predetermined interval in the axial direction. Signal transmission device. 3. The signal transmission device according to claim 1, wherein said pair of two ring-shaped conductors have mutually different diameters,
A signal transmission device, which is arranged correspondingly at predetermined intervals in a radial direction. 4. The signal transmission device according to claim 1, wherein said ring-shaped conductor has an annular plate shape. 5. The signal transmission device according to claim 1, wherein said ring-shaped conductor has an annular shape. 6. A hollow electromagnetic wave by combining with a rotating shaft, a first electromagnetic shield attached to the rotating shaft, and interlockingly rotating about the center of the rotating shaft, and the first electromagnetic shield. A second electromagnetic shield that forms a shield body and does not rotate in conjunction with the rotation axis; and a ring-shaped conductor that is provided in the hollow electromagnetic shield body and that is provided at a center of the rotation axis. A first conductor provided so as to rotate in conjunction with the center of rotation; a ring-shaped conductor provided in the hollow electromagnetic shield and coaxial with the first conductor at a predetermined distance from each other; A second conductor that is disposed above and that does not rotate in conjunction with the rotation shaft, is connected to the first conductor, is insulated from the first electromagnetic shield, and Rotation linked with A first conductor for transmitting a signal from the first conductor to the first conductor, or for transmitting a signal from the first conductor to the rotating part; and a second electromagnetic conductor connected to the second conductor. A second portion for transmitting a signal to the first conductor from a fixed portion that is insulated from the shield member and that does not rotate in conjunction with the rotation axis, or for transmitting a signal from the second conductor to the fixed portion;
A signal transmission device comprising: a conductor;