JPH04195499A - Signal transmitter - Google Patents

Abstract

PURPOSE:To enable signal transmission without any external noise by rotating either or both of ring-shaped conductors which are shielded electromagnetically by an electromagnetic shield body and performing the signal transmission from one conductor to the other through a conductor. CONSTITUTION:Laminate tubes while mounted on holders H are conveyed by a conveying conveyor 9 toward a rotary tube inspecting machine 2. When the tubes come to nearby the rotary tube inspecting machine 2, the respective holders H are arranged at specific intervals by a screw type timing screw 10 to move forward and then mounted on the rotary inspection base 12 of the rotary tube inspecting machine 2 by a star-shaped star wheel 11. The rotary inspection base 12 rotates clockwise and while the laminate tubes are rotated, their insides are inspected. Consequently, the signal transmission with small external noise mixture becomes possible between the rotary part and fixed part and the signal transmission accuracy is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a signal transmission device, and more particularly to a signal transmission device for transmitting signals between a rotating part and a fixed part.

[Conventional technology]

Conventionally, a common method for transmitting signals between a rotating part and a fixed part is to send and receive signals using a transmitting antenna and a receiving antenna.

[Problem to be solved by the invention]

However, this method inevitably introduces noise from the outside and becomes a noise source, which is a problem when accurate signal transmission is required.

SUMMARY OF THE INVENTION An object of the present invention is to provide a signal transmission device in which noise from the outside is reduced in signal transmission between a rotating part and a fixed part.

[Means to solve the problem]

MEANS TO SOLVE THE PROBLEM In order to solve the said subject, this invention is comprised as follows.

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

In FIG. 1, a signal transmission device 100 according to a first aspect of the invention includes a pair of ring-shaped conductors 101 and 102 from which conductive wires are drawn out, placed at a predetermined distance from each other in a hollow electromagnetic shielding body 103. 1 are arranged coaxially and facing each other, and
One of the ring-shaped conductors is provided so as to be rotatable in the circumferential direction about the axis.

The invention according to claim 2 provides the signal transmission device 1 according to claim 1.
00, the pair of ring-shaped conductors have substantially the same diameter and are arranged facing each other at a predetermined distance in the axial direction.

The invention according to claim 3 provides the signal transmission device 1 according to claim 1.
00, the two pairs of ring-shaped conductors have different diameters and are arranged correspondingly at a predetermined interval in the radial direction.

The invention according to claim 4 provides the signal transmission device 1 according to claim 1.
In 00, the ring-shaped conductor is configured in the shape of an annular plate.

The invention according to claim 5 provides the signal transmission device 1 according to claim 1.
00, the ring-shaped conductor is configured in the form of a circular ring.

The invention as set forth in claim 6 is a method of combining a rotating shaft, the electromagnetic shielding body of measure 1 which is attached to the rotating shaft and rotates in conjunction with the center of the rotating shaft as a rotation center, and this first electromagnetic shielding body. Forms a hollow electromagnetic shield body,
and a second electromagnetic shield body that does not rotate in conjunction with the rotation axis; and a ring-shaped conductor that is provided within the hollow electromagnetic shield body and rotates in conjunction with the rotation axis about the center of the rotation axis. a first conductor provided, and a ring-shaped conductor provided within a hollow electromagnetic shield body;
a second conductor disposed coaxially and facing the first conductor at a predetermined distance from each other and not rotating in conjunction with the rotating shaft; A first conducting wire that is insulated from the shield body and is used to send a signal from a rotating part that moves with the rotating shaft to the first conductor, or to send a signal from the first conductor to the rotating part, and a second conductive wire. A signal is sent to the first conductor from a fixed part that is connected to the first conductor, is insulated from the second electromagnetic shield, and does not rotate in conjunction with the rotating shaft, or sends a signal from the second conductor to the fixed part. and a second conducting wire for sending a signal.

[Effect]

According to the invention having the above-mentioned configuration, the antenna surfaces of the ring-shaped conductors 101 and 102 from which the conductive wires are respectively drawn out have the same ring shape, and their axes coincide with each other. Moreover, both are arranged facing each other at a predetermined interval. The two ring-shaped conductors are the electromagnetic shield body 1
It is electromagnetically shielded by 03. One or both of the ring-shaped conductors 101 and 102 is rotated to transmit a signal from one to the other via a conductive wire. In this case, the antenna surfaces face each other, and the shape of the antenna surfaces does not change even when rotated. It is also electromagnetically shielded. Therefore, it is possible to perform good signal transmission without mixing in external noise.

Furthermore, the pair of ring-shaped conductors may be arranged so as to overlap with each other at a predetermined interval in the axial direction, or the same result can be obtained by arranging them in a double ring shape in the radial direction. It will be done. Furthermore, the same effect as described above can be obtained even if the shape is an annular shape or on an annular line.

Moreover, if the structure is configured as in the sixth aspect of the invention, there will be no noise mixed in from the outside, and each conductive wire will not be twisted due to rotation.

〔Example〕

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

FIG. 2 shows the configuration of a tube inspection system using an embodiment of the present invention. This tube inspection system 200 includes a tube insertion section 1, a rotary tube inspection machine 2, a tube removal section 3, a conveyance device 4,
An emergency discharge conveyor 5 is provided.

The tube insertion section 1 includes an accumulation conveyor 6 and a pusher 7.
and a tube insertion jig 8. The rotary tube inspection machine 2 includes a rotating inspection table 12, a star wheel 13 for discharging defective products, a chute 14 for discharging defective products, and a pool 15 for defective products. The tube take-out section 3 includes a stopper 19, a stopper 21, a tube take-out pick and place 20, a pitch correction jig 22, a box conveyor 23, a box holding device 24a124b, box stoppers 25a and 25b, and a tube accumulation conveyor. 26 and a tube packaging device 27. The conveyance device 4 includes a conveyor 9 and a timing screw 1.
0, the star foil 11, the star foil 13 for discharging defective products, the joint screw 16, the star foil 17 for sorting, the good product conveyor 18, the empty holder conveyor 29, the empty holder conveyor 30, and the joining Device 3
1 and an empty holder conveyor 32.

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

The laminate tubes T are conveyed from the previous step A and are accumulated by the accumulation conveyor 6. Thereafter, a predetermined number of tubes are pushed out at once by a pusher 7, and placed on a holder H on a conveyor 9 by a tube insertion jig 8. The laminate tube T is carried by the conveyor 9 toward the rotary tube inspection machine 2 while being placed on the holder H. When reaching the vicinity of the rotary tube inspection machine 2, each holder H is advanced at a predetermined interval by a screw-shaped timing screw 10, and the rotary tube inspection machine 2 is rotated by a star-shaped star foil 11. It is placed on the examination table 12. The rotating inspection table 12 rotates clockwise in the figure, and inspects the inside of the laminate tube T while not rotating.

The detailed configuration and operation of the rotary tube inspection machine 2 will be described in detail later. If the product is determined to be defective as a result of the inspection, the defective laminate tube T is taken out and discharged upwards, leaving only the holder H, in the star-shaped star foil 13 that also serves as defective product discharge. The defective products are accumulated in a defective product pool 15 via a chute 14. The non-defective laminate tubes T and holders H and only the holders H remaining after the defective laminate tubes T are discharged are transferred to a star foil 17 by a screw-like connecting screw 16. The star foil 17 is distributed so that the good laminate tubes T and holders H are placed on the good product conveyor 18, and the empty holders from which the defective laminate tubes T have been discharged are placed on the empty holder conveyor 30. Good quality laminate tube T transported by good quality product conveyor 18
and holder H are transported to the tube take-out section 3 by the good product transport conveyor 18. In the tube take-out section 3, a predetermined number of laminate tubes T and holders H are first stopped by the stopper 21 and then by the stopper 19, and only the laminate tubes T are transferred to the good product conveyor 18 by the tube take-out pick and place 20.
taken out from above. Next, the pitch of these laminated tubes T is corrected by the pitch correction jig 22, and the tubes are stacked near the tube packaging device 27 by the tube stacking conveyor 26. On the other hand, a box conveyor 23 is provided below the stacking position of the laminate tubes T, and empty boxes E are conveyed from the previous process B. The empty box E has box holding devices 24a, 24b and box stoppers 25a, 25b.
The 0-tube boxing device 27, which is stopped by and transferred to the lower part of the tube packing device 27 as appropriate, boxes the accumulated laminate tubes T in predetermined numbers into empty boxes E.

The boxes that have been packed are transported to the next process C by the box transport conveyor 23. The holder H from which only the laminated tube T has been taken out by the tube takeout pin and place 20 is conveyed to the merging device 31 by the empty holder conveyor 29. Further, the empty holders sorted by the star foil 17 are also conveyed to the merging device 31.

The merging device 31 has two timing screws to merge these empty holders in a line and place them on the empty holder conveyor 32. Empty holder conveyor 3
2 conveys the empty holder to the tube insertion section 1 and connects it to the conveyor 9.

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

Next, FIGS. 3 and 4 show the configuration of a rotary tube inspection machine using an embodiment of the signal transmission device according to the present invention.
This will be explained with reference to FIG. 8 and FIG.

This rotary tube inspection machine 2 includes a base 35, a motor 36, a rotating shaft 37, a rotating inspection table 12, and a cam 4.
6, a cam follower 47, a holder lifting/lowering rotation shaft 48, a centering jig 38, an inside tube inspection device 39, a camera selector 43 (Fig. 4), a mixer 44, and an antenna section 45 which is a signal transmission device. , rotary resolver 49
, a fixed resolver 50, and a light intensity checker 51 (Fig. 4)
, cam positioner 87 (Fig. 8), and discriminator 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 closely share the fixed shaft and cover the fixed shaft. The rotating shaft 37 is configured to be rotationally driven by the motor 36. Further, a rotary resolver 49 and a fixed resolver 50 are provided to measure the angular positions of the fixed shaft and the rotating shaft. The rotating inspection table 12 is connected to a rotating shaft 37 and rotates as the rotating shaft 37 rotates. A holder H can be placed on the rotating inspection table 12. The holder H is lifted and lowered and rotated by a holder lifting and lowering rotation shaft 48. Holder lifting rotation axis 48
The vertical movement is performed by a cam 46 and a cam follower 47 provided at the lower end of the holder vertical rotation shaft 48. The laminate tube T (the squeeze opening side) can be inserted into the holder H. Also, a centering jig 38 that holds the starting end side of the laminate tube T in a circular shape is supported above the holder H. The tube inspection device 39 for inspecting the inside of the tube T includes an tube insertion section 40, a borescope 41, and a CCD camera 42.The borescope 41 includes a borescope body 52 and a borescope insertion section. The tube insertion section 40 includes a borescope insertion section 53, a light emitting diode section 54, and a photosensor section 55.The borescope insertion section 53 includes a laminate tube T. Mainly inspects the inner bottom side in the figure, that is, the squeezing mouth side, and the light emitting diode section 54 and photosensor section 55 mainly inspect the inner side of the laminate tube T.The rotary tube inspection machine 2 has 12 inner tubes. An inspection device 39 is provided, and a cam follower 47
Twelve holder lifting and lowering rotation shafts 48 are also provided.

The number of these objects is not limited to 12 and may be any other number. Each 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. The mixer 44 is the Ayunotena part 4
5. The antenna section 45 is connected to the discrimination device 84.

Next, the operation of the rotary tube inspection machine 2 will be explained with reference to FIG. 4 and FIG.

In FIG. 4, the laminate tube T is placed on a holder H and conveyed to the star foil 11 by a conveyor 9 or the like. Star foil 11 is laminated tube T
The entire holder H is loaded onto the rotating inspection table 12 of the rotary tube inspection machine 2. After being taken onto the rotating rotating inspection table 12, the holder H rises according to the cam curve of the cam 46 as the holder elevating rotation shaft 48 moves up and down,
Also, intermittent rotational movement is performed around the axis of the holder elevating and lowering rotating shaft 48. That is, as shown in FIG. 5, the rotating inspection table 12 revolves in the rotational direction and then rotates on its axis at the inspection position. Time - time stop. As the holder H rises, the laminate tube T also rises, and the centering jig 38
The tube insertion section 40 of the tube inspection device 39 is inserted into the tube held in a circular shape by the tube (FIG. 4). In this way, the tube insertion part 40 is inserted inside the tube.
With the laminate tube T inserted, point 21~
By rotating intermittently between 24 and 24, the inner bottom surface and inner surface of the tube can be inspected in this section using the tube inner inspection device 39 (fifth
figure).

This intermittent rotational movement corresponds to relative plane movement between the cylindrical body and the imaging means. When the inspection of one tube is completed, as described above, the defective laminate tube T is discharged by the defective product discharge star foil 13, and the non-defective laminate tube T is conveyed toward the tube removal section 3. In addition, the tube insertion part 4
Before O is inserted into the laminate tube T, the light amount of the light emitting part is checked by a light amount checker 51, and the result is reflected at the time of data processing. Furthermore, if the light intensity is below a reference value, an alarm can be issued and parts can be replaced.

Next, a more detailed configuration of the tube insertion section will be explained based on FIGS. 6 and 7.

FIG. 6(A) shows a cross section of the tube insertion portion 4o inserted into the laminate tube T in the II direction. Moreover, FIG. 6(C) is a cross-sectional view in the nn direction, and FIG. 6(D) is a cross-sectional view in the m-m direction.

In the tube insertion part 4o, a light emitting diode part 54 is attached to the borescope 41 via a joining fitting 56 and a port 57, and a light emitting diode part 54 and a 7t center f55 are attached.
a, 55b, 55c.

55d, 55e, and 55f are attached.

A sectional view of the borescope insertion portion 53 is shown in FIG. 6(B). The borescope insertion part 53 is made of a stainless steel tube 58
A lens section 60 for capturing an image is provided inside the lens section 60, and a light source fiber section 59 including a thin glass fiber is provided around the lens section 60.
is provided.

In the figure, the end surface S of the borescope insertion portion 53 is perpendicular to the fineness of the borescope insertion portion 53, but it may be cut obliquely so as to have a certain angle with respect to the fineness. In this case, the field of view is expanded not only vertically downward but also diagonally. Further, the borescope insertion portion 53 is eccentric from the axis of the laminate tube T, and its positional relationship is shown in FIGS. 7(A) and 7(C). That is, in this case, the inspection possible area F of the borescope insertion part 53
1 is a quarter-circular portion obtained by excluding the mask portion (hatch portion) from the square camera field of view. As shown in FIG. 5, the laminate tube T rotates intermittently and stops at the point P SP SP SP , so when it stops at the point P1, the testable area F in FIG. 7(C) can be checked. When the point P2 stops, the testable area F2 can be tested. Thereafter, similarly, the testable area F3 can be inspected when the point P3 is stopped, and the testable area F4 can be inspected when the point P4 is stopped. In this way, by dividing the inspection area as shown in FIGS. 7(A) and (C) and imaging and inspecting the inner bottom surface, the area shown in FIGS. 7(B) and (D) is obtained. Insert the borescope insertion part 53 into the axis of the laminate tube T.
Compared to inspecting the area as one inspection area, the resolution can be further improved, and defects such as finer contaminants and scratches can be detected. The division of the inspection area is not limited to four, and may be any other number.

On the other hand, the light emitting diode section 54 is made of 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.

Each of the photosensors 55a to 55f has a light emitting diode section 5.
Three test tubes are provided on each side of the test tube 4, and the test regions overlap each other as shown in FIG. 6(C). With this configuration, during the period when the photosensors 55a to 55f1 laminate tube T is rotating, that is, the points P1, P, P in FIG.
The inner surface can be inspected during all periods except when stopped at SP 4. Here, the photosensors 55a to 55f may be provided in one row, or
It may also be a photoelectric conversion element other than a photosensor, such as a CCD element.

Next, processing of the inspection information detected by the in-tube inspection device 39 will be explained. 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 photosensor section 55 is converted into an audio signal, and both are mixed. , is transmitted to the outside to determine whether or not it is defective. FIG. 8 is a process diagram showing the flow of image information processing of 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 also be performed in the same manner.

In FIG. 8, the block is roughly divided into a rotating block 85 and a fixed block 86. The rotating block 85 includes 12 CCD cameras 42a, 42b, and 42c.

4.2d, 42e, 42f, 42g, 42h.

42 i, 42 j, and 42 include 421, a camera selector 43, a mixer 44, an electromagnetic shielding cover 72 for the antenna section 45, a transmitting antenna 74, a cam positioner 87, and a rotary resolver 49. .

The fixed block 86 includes the electromagnetic shielding cover 73 of the antenna section 45, the receiving antenna 75, the distributor 88, and tuners 89a, 89b, and 89c.

89d, 89e, 89f, 89g, and 89h, controllers 90A and 90B, a monitor 918191b, a cam positioner 92, a defective determination circuit 93, and a fixed resolver 50. Here, a distributor 88, tuners 89a to 89h, controllers 90A and 90B,
The monitor 91a191b, cam positioner 92, and defective determination circuit 93 constitute a determining device.

The image information of the inner bottom surface of the laminate tube T from each CCD camera 42a to 421 is obtained from the angular position of the rotating inspection table 12 detected by the rotating resolver 49 and the height position of the cam follower 47 detected by the cam positioner 87. The camera selector 43 identifies the camera to be imported, selects and imports only image information from that camera, and sends it to the mixer 4.
4. As is clear from FIG. 5, when a certain laminate tube T reaches point P4, it has already reached point P1.
Point P1 Since the subsequent laminate tube T has also reached point P1, image information from four cameras is captured at the same time. The mixer 44 mixes these four pieces of image information and outputs it to the transmitting antenna 74. The mixed image information is transmitted from transmitting antenna 74 to receiving antenna 75. The transmitting antenna 74 and the receiving antenna 75 are electromagnetically shielded by an electromagnetic shielding cover 72 and an electromagnetic shielding cover 73. The mixed image information received by the receiving antenna 75 is divided into frequency bands by a distributor 88 and sent to each tuner 89a to 89h, where information signals are detected. Among the tuners 898 to 89h, the information signals from the tuners 89a to 89d are transmitted to the controller 9.
Sent to 0A. Information signals from the tuners 89e to 89h are also sent to the controller 90B. The controller 90A190B is monitored by monitors 91a and 91b.

The cam positioner 92 identifies the camera number from the detected angular position of the rotating inspection table 12 and the height position of the cam follower 47 detected by the cam positioner 87 and transmits it to the defect determination circuit 93. A select signal is issued to the controller 90A or the controller 90B to select the signal to be sent to the defect determination circuit 93 from among the information signals from each tuner. The defect determination circuit 93 determines whether or not the image information signal from each camera is defective, and outputs the result to the outside. For example, the image information signal is binarized based on brightness and judged based on the number of pixels in the dark area.

An example of the configuration of the antenna section 45, which is an embodiment of the present invention, will be described with reference to FIGS. 9 and 10. Here, the hatched portion indicates an example of a fixed block. antenna part 4
5, a transmitting antenna 74, a receiving antenna 75, an electromagnetic shielding cover 72 for electromagnetically shielding these, an electromagnetic shielding cover 73, and mounting brackets 76 for each antenna.
77 and lead wires 81 and 82 for supplying signals. Here, there are two transmitting antennas 74 and two receiving antennas.
This corresponds to a pair of individual ring-shaped conductors. The electromagnetic shielding covers 72 and 73 constitute an electromagnetic shielding body. Further, the lead wires 81 and 82 correspond to conducting wires. As shown in FIG. 9, the transmitting antenna 74 is attached to the rotating block side, and the receiving antenna 75 is attached to 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, allowing stable transmission and reception of information signals. Since it is shielded, it is not affected by external noise.

The antenna section according to the present invention may have a configuration as shown in FIG. FIG. 11(A) shows a side view of this antenna section, and FIG. 11(B) shows a cross section of FIG. 11(A). This antenna section is roughly divided into a rotating section 115 attached to the rotating shaft, a fixed section 114 that is immovable with respect to the rotating shaft, and a thrust adjustment collar 119 that applies a thrust (pressing) load to the fixed section. The rotating part 115 and the fixed part 114 are made of a conductor and constitute an electromagnetic shield. Rotating part 115
A ring-shaped groove centered on the narrow center of the rotating shaft 37 is formed inside the identifying portion 114, and the groove on the rotating portion 115 side and the groove on the fixed portion 114 side overlap. At the bottom of each ring-shaped groove, a ring-shaped receiving antenna 111 is installed on the fixed part 114 side, and a ring-shaped transmitting part antenna 112 is also installed on the rotating part 115 side, so that the receiving antenna 111 and the fixed part 114 are connected to each other. The space between them is insulated by an insulating section 113. Similarly, the transmitting antenna 112 and the rotating section 115 are insulated.

In this way, the receiving antenna 111 and the transmitting antenna 112 face each other with an air gap in between. Here, receiving antenna 1
11 and 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 conducting wire. Further, the signal from the receiving antenna 111 is outputted from the conducting wire and the BNC connector 116. The rotating part 115 is fixed to the rotating shaft 37 by a shaft fixing port 118, and the thrust load adjustment collar 119, which rotates as the rotating shaft 37 rotates, is fixed to the rotating shaft 37 by an adjustment screw 120, and the thrust load adjusting collar 119 rotates with 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 fixed part 114, so that the fixed part 114 is always pressed against the rotating part 115. Therefore, the rotating part 115 rotates while sliding with respect to the fixed part 114.

In addition, since the pressurizing flat spring 121 slides and rotates between the thrust load adjusting collar 119 and the fixed part 114,
Portions 122 and 123 that come into contact with the spring are provided with dry metal. Similarly, since the rotating shaft 37 and the fixed part 114 also perform sliding rotation, a trimetal 124 is also provided on the rotating shaft side of the fixed part 114.

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

An example of the configuration of the rotary resolver 49 and the fixed resolver 50 is shown in the ninth example.
As shown in the figure. A resolver is a device that provides angular position information of a rotation axis, etc., as an electrical signal. As illustrated, the rotary resolver 49 is a resolver for detecting angular position information on the rotary block side, and the resolver main body is attached to the rotary block side. The shaft 71 that serves as the reference for rotation is the gear 69
．． 70a and 70b are configured to exhibit the same angular position as the fixed axis 65. That is, the gear 70b is a planetary gear, and the gear 69 and the gear 70a have the same number of teeth. With this configuration, the shaft 71
always exhibits an angular position equal to the fixed axis 65. Further, the fixed resolver 50 is a resolver for detecting angular position information on the fixed side, and the resolver main body is attached to the fixed block side. The rotation of the rotating shaft 80 is controlled by the gear 7.
8 and gear 79 from the rotating block section.

The motor 36 is attached to the fixed shaft 65 by a motor stand 66 and rotates the rotary block by means of gears 67,68.

FIG. 12 is a diagram showing the operating status of the camera and controllers 90A and 90B at each angular position, where a number in each column indicates an ON state, and a number of 0 indicates an OFF state. .

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

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

By operating in this manner, the number of expensive controllers can be reduced and the small number of controllers can be operated efficiently.

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

In the above embodiment, the transmitting antenna is a ring-shaped conductor;
We have explained an example where the receiving antenna is annular plate shape.
This may be circular. Alternatively, it may be disk-shaped or linear.

Furthermore, it may have a double ring shape that overlaps in the radial direction. This is because the action and effect remain the same.

In the above embodiment, the cylindrical laminate tube T was intermittently rotated by the holder H, and the CCD camera 42 itself was fixed to the rotating block;
The D camera 42 itself may rotate intermittently, and the laminate tube T itself may not rotate. However, in this case, a transmitting/receiving antenna (for example, a small antenna section 45) is required to transmit and receive image signals of the CCD camera 42 between the rotating camera side and the rotating block, which is the fixed side for the camera. It is necessary to provide one for each camera. In addition, the CCD camera 42 does not need to be moved by rotation (rotation), but as long as the entire inner bottom surface can be covered, other movement methods may be used.
For example, a zigzag motion may be used.

Furthermore, in this embodiment, the laminate tube T is intermittently rotated and the quality is inspected using static images, but it is also possible to continuously rotate the tube and capture image information for processing and discrimination. . Similar to the above, the laminate tube may move in a zigzag motion or the like instead of a rotational motion.

Furthermore, in this embodiment, the laminate tube T also performs a revolution movement. This is because by doing so, it becomes possible to install the inspection positive in a small space directly in the middle of the production line.

However, this is not necessarily limited to orbital movement, and may be linear movement as long as it rotates intermittently while moving in the - direction and a camera can be inserted.

Furthermore, in this embodiment, the CCD camera 42 is inserted into the inside of the laminate tube T by raising and lowering the laminate tube T;
The tube may be inserted into the laminate tube T by being raised and lowered.

Furthermore, in the above embodiment, the laminate tube T is a cylindrical body whose bottom end is tapered and has a take-out port in a part thereof, but this is similar to a closed bottle or can. A cylindrical body with a bottom may also be used.

〔Effect of the invention〕

As described above, the present invention has the advantage that it is possible to perform signal transmission between the rotating part and the fixed part with less noise mixed in from the outside, and it is possible to improve signal transmission accuracy.

[Brief explanation of the drawing]

Fig. 1 is a diagram explaining the principle of the present invention. Fig. 2 is a diagram showing the configuration of a tube inspection system using a rotary tube inspection machine which is an embodiment of the present invention. Fig. 3 is an embodiment of the present invention. Figures 4 and 5 are diagrams explaining the operation of the rotary tube inspection machine shown in Figure 3. Figure 6 is a diagram showing the structure of the rotary tube inspection machine shown in Figure 3. Figure 7 is a diagram illustrating the camera field of view of the insertion part in the tube, Figure 8 is a block diagram showing image information processing of the inner bottom surface of the laminate tube detected by the CCD camera, and Figure 9 is the antenna part. FIG. 10 is a diagram showing an example of the configuration of the antenna section, FIG. 11 is a diagram showing an example of another configuration of the antenna section, and FIG. 12 is a CCD
FIG. 13 is a diagram showing the operating status of the camera and the controller. FIG. 13 is a diagram showing the transition of the controller used for each camera. FIG. 14 is an operation timing chart of the camera and the controller. 1... Tube insertion section 2... Rotary tube inspection machine 3... Tube removal section 4... Conveying device 5... Emergency discharge conveyor 6... Accumulating conveyor 7... Pusher 8...・Tube insertion jig 9 ・Transport conveyor 10 ・Timing screw 11 ・Star foil 12 ・Rotary inspection table 13 ・Star foil 14 for discharging defective products ・Chute for discharging defective products 15...Defective product pool 16...Joining screw 17...Distribution is done by star foil 18...Good product conveyor 19...Stopper 20...Tube takeout big and place 21.
... Stopper 22 ... Pitch correction jig 23 ... Box transport conveyor 24a, 24b ... Box holding device 25a, 25b ... Box stopper 26 ... Tube accumulation conveyor 27 ... Tube packing device 29 .30...Empty holder conveyor 31...Merge device 32...Empty holder transfer conveyor 35...Base 36...Motor 37...Rotating shaft 38...Centering jig 39... - Tube inspection device 40... Tube insertion section 41... Bore scope 42.42a ~ 421-CCD camera 43... Camera selector 44... Mixer 45... Antenna section 46... Cam 47 ...Cam follower 48...Holder lifting/lowering rotation shaft 49...Rotating resolver 50...Fixed resolver 51...Light amount checker 52...Borescope body 53...Borescope insertion part 54...Light emission Diode section 55...Photo sensor sections 55a to 55f...Photo sensor 56...Joining fittings 57...Bolts 58...Stainless steel tube 59...Light source fiber section 60...Lens section 65.・・Fixed shaft 66・・・Motor stand 67.68.69.70a, 70b・・・Gear 71・・
・Axle 72.73...Electromagnetic shield cuckoo 74...Transmission antenna 75...Reception antenna 76.77...Mounting bracket 78.79...Gear 80...Rotation shaft 81.82... - Lead wire 84... Discrimination device 85... Rotating block 86... Fixed block 87... Cam positioner 88... Distributor 89a to 89h... Tuner 90A, 90B... Controller 91a, 91b --Monitor 92...Cam positioner 93...Failure judgment 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...Pressure spring 122.123.124...Dry metal 200...
・Tube inspection system E...Empty box F...Inspection possible area H...Holder P...Cylindrical body Pl...Tube position on the rotating inspection table S...Borescope insertion part end face S...Video signal T...Laminated tube applicant Yasushi Ishikawa Figure 1 Figure 5 (A)
(B) (C)
(D) Figure 10 (A) (B) Figure 11

Claims (1)

[Claims] 1. In a hollow electromagnetic shielding body, a pair of binary ring-shaped conductors each having a conductive wire drawn out therefrom are disposed coaxially facing each other at a predetermined distance from each other, and A signal transmission device characterized in that a ring-shaped conductor is provided so as to be rotatable in a circumferential direction about the axis. 2. The signal transmission device according to claim 1, wherein the two ring-shaped conductors have substantially the same diameter and are arranged facing each other at a predetermined distance in the axial direction. Transmission device. 3. The signal transmission device according to claim 1, wherein the two ring-shaped conductors have different diameters and are arranged correspondingly at a predetermined interval in the radial direction. . 4. The signal transmission device according to claim 1, wherein the ring-shaped conductor has an annular plate shape. 5. The signal transmission device according to claim 1, wherein the ring-shaped conductor has a circular ring shape. 6. A rotating shaft, a first electromagnetic shielding body attached to the rotating shaft and interlockingly rotating around the center of the rotating shaft, and a hollow electromagnetic shielding body by combining with the first electromagnetic shielding body. a second electromagnetic shield body formed in the hollow electromagnetic shield body and not rotating in conjunction with the rotation axis; and a ring-shaped conductor provided within the hollow electromagnetic shield body, the second electromagnetic shield body rotating about the center of the rotation axis. a first conductor provided to rotate in conjunction; a ring-shaped conductor provided within the hollow electromagnetic shield body and coaxially opposed to the first conductor at a predetermined distance from each other; a second conductor that is arranged and does not rotate in conjunction with the rotation shaft; and a second conductor that is connected to the first conductor, insulated from the first electromagnetic shield, and that rotates in conjunction with the rotation shaft. a first conducting wire for sending a signal from the rotating part to the first electrical conductor, or for sending a signal from the first electrical conductor to the rotating part; for sending a signal to the first conductor from a fixed part that is insulated from the electromagnetic shield and does not rotate in conjunction with the rotating shaft, or for sending a signal from the second conductor to the fixed part. Second
A signal transmission device comprising: a conducting wire;