JPH0445761B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tire cord arrangement inspection machine that uses radiation to inspect the arrangement of cords embedded within a tire.

Conventionally, as a tire cord arrangement inspection machine as described above, the one described in Japanese Patent Publication No. 55-703, for example, is known. When the tire is loaded onto a horizontal swing frame,
The swing frame tilts to a substantially upright position. At this time, the tread surface of the tire contacts the belt, and as the belt runs, the tire rotates around its axis of rotation. Furthermore, due to this tilting, the tip of the rotating rod parallel to the rotational axis of the tire is inserted into the space surrounded by the bead of the tire (generally where the rim is placed). This rotating rod is rotatably supported by a frame that supports the swinging frame. An arm holding a radioisotope is fixed to the tip of the rotating rod, and a pair of detectors that receive radiation from the radioisotope are fixed to the swinging frame. After the tilting of the swinging frame is completed, the rotating rod is rotated and the radioisotope is moved to a specified position within the tire. Next, the belt is run and the tires are rotated. At this time, the radiation from the radioisotope passes through the tire and reaches the detector, but the intensity of the radiation received by the detector varies depending on whether the radiation passes through the rubber part or the cord part. As a result, it is possible to detect irregularities in the tire cord arrangement. Here, if the size of the tire to be inspected changes, the area to be measured changes in the radial direction of the tire in accordance with the tire size.

However, in the case of the tire code alignment inspection machine described above, information regarding the tire size is not provided, so when the tire size changes, it is difficult to accurately trace the straight line connecting the radioisotope and the detector. There is a problem in that it is not possible to intersect the part of the tire to be measured, which causes errors in the inspection results.

The present invention has been made in view of the above-mentioned problems, and aims to perform accurate inspection by accurately moving a radiation source and a detector to specified positions according to the size of the tire.

These purposes include a determination mechanism that determines the tire size, a holding mechanism that holds the tire in a fixed position, a radiation source that emits radiation, and a system that receives radiation from the radiation source that has passed through the tire. A detector that detects the intensity of the radiation, and a line connecting the radiation source and the detector to a position where a straight line connecting the radiation source and the detector intersects the measurement site of the tire determined based on the determination result of the determination mechanism. a moving mechanism that moves the tire, and a rotating mechanism that rotates the tire about its rotation axis in a holding position;
This can be achieved by including a measuring mechanism that measures the tire cord arrangement based on the intensity of radiation detected by a detector when the tire rotates.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In FIGS. 1 and 2, 1 is a floor surface, and a frame 2 is installed on this floor surface 1. The frame 2 has a vertical central beam 3 at the center, and a determination mechanism 4 is installed on one side of the frame 2 from the central beam 3 to determine the size of each tire. The determination mechanism 4 has a horizontal beam 5, on which a base end of a mounting table 7 is rotatably supported via a bearing 6. The tip of the mounting table 7 is in contact with a stopper 8 fixed to the frame 2. Reference numeral 9 denotes a cylinder whose head side is connected to the lower end of the frame 2, and the tip of the piston rod 10 of this cylinder 9 is connected to the central portion of the mounting table 7. As a result, when the cylinder 9 is actuated, the mounting table 7 swings between a mounting position A in which it contacts the stopper 8 and a substantially upright position B. and,
The upper surface of this mounting table 7 is formed in such a shape that even when tires T of different sizes are placed on the mounting table 7, the rotation axis of each tire T is located on a common vertical plane P. ing. 11,1
2 is a pair of vertical guide rods fixed to the upper part of the frame 2 and the horizontal beam 5, and these guide rods 11, 12 are provided with a pair of moving members 13,
14 are vertically spaced apart and slidably supported.
15 is a screw shaft rotatably supported on the upper part of the frame 2 and the horizontal beam 5;
Reverse threads are formed at the upper and lower parts of 5, and these threaded portions are screwed into the moving members 13 and 14. As a result, when this screw shaft 15 is rotated by the driving means 16, the moving members 13, 14
move toward or away from each other. The moving member 1
3 and 14 are provided with optoelectronic switches 17 and 18, and these optoelectronic switches 17 and 18 are located on the vertical plane P. Two pulse encoders (not shown) are attached to the screw shaft 15, which generate one pulse each time the screw shaft rotates once, and these pulses are sent to a pulse counter (not shown) and counted. Ru. and,
The photoelectronic switches 17 and 18 control the pulses from the pulse encoder to the pulse counter by receiving or blocking light, thereby measuring the inner and outer diameters of the tire T and determining the size of the tire T. That's what I do. The aforementioned horizontal beam 5, mounting table 7, cylinder 9, and guide rod 1
1, 12, moving members 13, 14, screw shaft 15, drive means 16, photoelectronic switches 17, 18, pulse encoder, and pulse counter collectively constitute the determination mechanism 4. Support stands 21 and 22 are fixed to the other ends of the central beam 3 and the frame 2, respectively, and rollers 23 and 22 are fixed to each support stand 21 and 22, respectively.
24 is rotatably supported. This roller 2
A guide plate 25 fixed to the central beam 3 is installed between the center beam 3 and the base end of the mounting table 7.
5 is a tire T ejected from the mounting table 7 as the mounting table 7 is swung toward the substantially upright position B.
are guided to the rollers 23 and 24. roller 2
Horizontal support beams 26 and 27 are attached to the center beam 3 above the center beam 3 and the other end of the frame 2, and a plurality of vertical guide rollers 28 and 29 are rotatably supported on these support beams 26 and 27. has been done. Then, the tire T is connected to the guide plate 25.
When rolling on the top, these guide rollers 2
8 and 29, so it will not fall. 30 is a lower guide, and this lower guide 3
0 is the support stand 2 as shown in FIGS. 1, 2, and 3.
A pair of horizontal rotation shafts 31 supported by 1 and 22,
32, the pivot axes 31, 32 being parallel to the support beams 26, 27. Rotation shafts 31, 32
Sector-shaped external gears 33 and 34 that mesh with each other are fixed to the rotating shafts 31 and 34, so that the rotating shafts 31 and 32 rotate in opposite directions in synchronization. The base ends of a pair of moving bars 35, 36 are fixed to each of the rotating shafts 31, 32, and these moving bars 35, 36 are tilted toward each other as they move upward, as shown in FIG. ing. A plurality of mini rollers 37 are attached to the inner surface of the tip of each moving bar 35, 36, and these mini rollers 37 are arranged so that the moving bars 35, 36 are connected to the tire T.
Even if the tire T is in contact with the sidewall of
rotation is allowed. A cylinder 38 is attached to the support base 22, and the tip of a piston rod 39 of this cylinder 38 is connected to one of the moving bars 35. As a result, when the cylinder 38 is actuated, the moving bars 35 and 36 open and close synchronously about the rotating shafts 31 and 32, thereby centering the tire T supported by the rollers 23 and 24. The aforementioned rotating shafts 31, 32, external gears 33, 34, moving bars 35, 36, cylinder 38
constitutes the lower guide 30 as a whole. Again, in FIGS. 1 and 2, an upper guide 41 having the same structure as the lower guide 30 is provided above the lower guide 30. This upper guide 41 has two pairs of bearings 42 attached to the upper part of the frame 2, and these bearings 42 support rotating shafts 45 and 46 to which mutually meshing sector-shaped external gears 43 and 44 are attached. has been done. Each rotation axis 4
A pair of moving bars 48, 49 to which a plurality of mini rollers 47 are attached are fixed to 5, 46. 50 is a cylinder attached to the upper part of the frame 2, and the tip of the piston rod 51 of this cylinder 50 is connected to a link 52 attached to the rotation shaft 45. As a result, cylinder 5
0 operates, the moving bars 48 and 49 open and close in synchronization to center the tire T. The aforementioned bearing 42, external gears 43, 44, rotation shaft 45,
46, moving bars 48, 49, and cylinder 50 constitute the upper guide 41 as a whole. and,
the rollers 23, 24, guide rollers 28, 29,
The lower guide 30 and the upper guide 41 collectively constitute a holding mechanism 53 that holds the tire T in a fixed position. In FIG. 2, 61 is a bead opening mechanism provided on the front surface of the frame 2 on the other side, and this bead opening mechanism 61 pushes open both bead portions of the tire T held by the holding mechanism 53, and To easily insert a source into a tire T. The bead opening mechanism 61 has an elevating frame 62, which is attached to the tip of a piston rod 60 of a cylinder 59 connected to the upper part of the frame 2. A horizontal cylinder 63 extending in the front-rear direction is attached to the elevating frame 62, and a moving frame 65 is connected to the tip of a piston rod 64 of this cylinder 63. As shown in detail in FIG. 4, the movable frame 65 has a pair of cylindrical guides 66, 67, each of which has a movable rod 68, 69 slidably extending in the front-rear direction. It has been inserted.
Reference numeral 70 denotes a link whose center is rotatably supported by the movable frame 65, and both ends of this link 70 are connected to the movable rods 68, 69. Further, a cylinder 71 is attached to the moving frame 65, and a piston rod 72 of this cylinder 71 is attached to the moving frame 65.
The tip of the rod is connected to a moving rod 68. As a result, when the cylinder 71 operates, the moving rod 6
8 and 69 reciprocate in opposite directions in synchronization. Holders 73, 74 are fixed to the tips of the moving rods 68, 69, and opening claws 75, which protrude toward the holders 74, 73 facing these holders 73, 74, are provided.
A base end portion of 76 is rotatably supported. These opening claws 75 and 76 are coaxial, and each opening claw 7
Discs 77, 78 are formed at the tips of the tires 5, 76 to roll into contact with the inner surfaces of both bead portions C of the tire T. The above-mentioned lifting frame 62 and cylinder 6
3, moving frame 65, moving rods 68, 69,
The link 70, cylinder 71, and opening claws 75 and 76 collectively constitute the bead opening mechanism 61.
1, 2 and 5, a vertical cylinder 91 is provided at the rear of the other frame 2, and the head side of this cylinder 91 is connected to the upper part of the frame 2. Piston rod 92 of cylinder 91
A substantially L-shaped elevating frame 93 is attached to the tip. A vertical guide body 94 is fixed to the rear part of the frame 2, and a guide block 9 attached to the elevating frame 93 is attached to this guide body 94.
5 are slidably engaged. Lifting frame 93
A horizontal guide frame 96 extending in the front-rear direction is attached to the upper part of the holder, and a movable frame 97 movable in the front-rear direction is slidably supported on the guide frame 96. 98 is a cylinder attached to the lifting frame 93;
The tip of the piston rod 99 is the moving frame 97.
is connected to. This moving frame 97 supports an X-ray tube 100 as a radiation source that emits radiation, for example, X-rays. A line is emitted. Support stands 102 and 103 are attached to the front and rear parts of the lower end of the elevating frame 93, and each support stand 10
An inclined guide bar 104 is fixed to 2,103 as shown in FIG. Each guide bar 1
04 is slidably engaged with a guide block 106 fixed to a moving table 105. 107 is a cylinder attached to the support stands 102, 103, and the piston rod 108 of each cylinder 107
The tip of is connected to the moving table 105. Detectors 109 and 110 are respectively attached to the movable table 105, and these detectors 109 and 110 receive the X-rays from the X-ray tube 100 that have passed through the tire T and detect the intensity of the X-rays. In this way, the X-ray tube 1 is attached to the common lifting frame 93.
00 and detectors 109 and 110 are attached, the cylinder 91 as the first moving mechanism
, the X-ray tube 100 and the detectors 109, 110 move together in the radial direction of the tire T, in this case in the vertical direction.
As a result, the X-ray tube 100 and the detector 109,
The radial positional relationship of the tire T with the tire T 110 does not change even if they move and remains constant, improving detection accuracy. Further, the detectors 109, 110
The X-ray tube 10 is located on the intersection area D of the field of view of
The moving path E of the radiation port 101 of No. 0 is located.
As a result, detection preparations can be made simply by operating the cylinder 98 as the second moving mechanism and moving only the radiation port 101 of the X-ray tube 100 in the direction of the rotational axis of the tire T to the intersection area D, and the detection work can be performed quickly. , and the relative positional relationship in the axial direction is more accurate than when individually positioning.
Further, as described above, since the bead part C of the tire T is pushed open by the bead opening mechanism 61, even if the X-ray tube 100 is large, it can be inserted into the tire T. The intensity of the X-rays emitted from the ray tube 100 can be increased. Therefore, as shown by the imaginary line in FIG. 5, a plurality of (two in FIG. 5
Even if additional detectors are provided, sufficient detection can be achieved. In this way, when the number of detectors increases, the code arrangement of the tire T can be detected over a wide range, and the detection can be made more accurate. The aforementioned cylinders 91, 98 as a whole constitute an X-ray tube 100 and detectors 109, 110.
A moving mechanism 121 is configured to move the sensor to the measurement position. The amount of expansion and contraction of the piston rods 92 and 99 of these cylinders 91 and 98 is determined based on the determination result of the determination mechanism 4. That is,
By determining the size of the tire T by the determination mechanism 4, it is determined which part of the tire T is best to measure.
1 and the detectors 109 and 110 (the second
X-ray tube 100 until the point where the
Both cylinders 91 and 98 are controlled to move the detectors 109 and 110. As a result, even if the size of the tire T changes, the tire cord arrangement can always be inspected at the best position. The detectors 109 and 110 are
As shown in FIG. 6, there is a slit 131 that converts the received X-rays into a thin beam, and a scintillator 1 that converts the X-rays that have passed through the slit 131 into light.
32, and a detection circuit 133 including a photomultiplier tube that converts light in the scintillator 132 into an electrical signal.
It consists of and. Again, in FIGS. 1 and 2, a motor 142 is attached to the lower part of the frame 2 via a support stand 141, and this motor 14
2 is connected to a reduction gear 143. Reducer 1
A belt 145 is stretched between the rollers 23 and 24 and a roller 144 fixed to the output shaft of the motor 43, and when the motor 142 is operated, the rollers 23 and 24 rotate at the same speed and in the same direction. One end of an arm 146 is rotatably connected to the upper part of the central beam 3, and the other end of this arm 146 has a presser roller 147 that presses the tire T placed on the rollers 23, 24 against these rollers 23, 24.
is rotatably supported. 148 is a vertical cylinder attached to the upper part of the frame 2, and the piston rod 149 of this cylinder 148
The tip of the arm 146 is connected to the center of the arm 146. Then, when the motor 142 is operated while pressing the tire T against the rollers 23 and 24 with the presser roller 147, the tire T is moved to the holding position G shown in FIG.
It rotates around its rotational axis at a constant rotational speed without vibration. The aforementioned motor 14
2, reducer 143, rollers 23, 24, 144,
Belt 145, arm 146, presser roller 147
constitutes a rotating mechanism 150 as a whole, where the rollers 23 and 24 also serve as the holding mechanism 53. A vertical cylinder 151 is erected at the bottom of the frame 2 on the roller 23 side from the midpoint between the rollers 23 and 24, and the piston rod 1 of this cylinder 151
A protruding block 153 is attached to the tip of 52. Reference numeral 154 denotes a swingable stopper plate, and when the tire T is carried in, the stopper plate 154 is positioned at the inclined position H shown by the imaginary line in FIG. 1 to prevent the tire T from rolling out.
When carrying out the tire T, it is positioned at a horizontal position J shown by a solid line in the figure, and the tire T is guided to the next process. again,
In FIG. 6, 161 is the detector 109, 110
a measuring mechanism connected to the measuring mechanism 16;
1 measures the cord arrangement of the tire T based on the intensity of X-rays detected by the detectors 109 and 110 when the tire T rotates, and determines whether the tire T is acceptable or not.

Next, the operation of one embodiment of the present invention will be explained.

First, a tire T of a certain size is carried into the determination mechanism 4 by a carrying device (not shown), and placed on the mounting table 7 located at the mounting position A. At this time, the axis of rotation of the tire T is located on the vertical plane P, regardless of its size. Also,
At this time, the moving members 13 and 14 are closest to each other, and the optoelectronic switches 17 and 18 are located on the vertical plane P near the rotation axis of the tire T. Next, the drive means 16 is activated to rotate the screw shaft 15.
As a result, the movable members 13 and 14 move toward the guide rod 1.
1 and 12 and move away from each other. on the other hand,
As the screw shaft 15 rotates, pulses are sent from the pulse encoder to pulse counters for measuring the inner diameter and outer diameter, and the number of pulses is accumulated in each pulse counter. Then, when the photoelectronic switches 17 and 18 reach the bead portion C of the tire T and are shielded from light, the supply of pulses to the pulse counter for measuring the inner diameter is stopped. Thereby, the inner diameter of the tire T is measured. On the other hand, the pulse counter for measuring the outer diameter continues to integrate, and the photoelectronic switches 17 and 18 turn on the tire T.
When the light passes through the tread portion of the tread, the pulse supply to the pulse counter for measuring the outer diameter is stopped. Thereby, the outer diameter of the tire T is measured.
Then, the size of the tire T is determined by measuring the inner and outer diameters of the tire T, and information regarding this size is sent to the moving mechanism 121. When the size determination of the tire T is completed, a tire request signal is sent to the cylinder 9, and the piston rod 10 protrudes.
As a result, the mounting table 7 swings from the mounting position A to the substantially upright position B, and the tire T is sent onto the guide plate 25. After rolling on the guide plate 25, the tire T collides with the stopper plate 154 at the inclined position H, stops rolling, and is held by the rollers 23 and 24. While the tire T is rolling, the tire T is held between the guide rollers 28 and 29, so that it will not fall over. Next, the cylinders 38, 50 are actuated to project the piston rods 39, 51, and the moving bars 35, 36, 48, 49 are closed. This results in
The tire T on the rollers 23, 24 is centered. In this way, move the tire T to the upper and lower guides 4.
1 and 30 for centering by moving the tire T in the direction of the rotational axis, the X-ray tube 10
0. It is not necessary to move the detectors 109 and 110 in the rotational axis direction of the tire T in accordance with changes in the width of the tire T and changes in the holding position G. Next, the cylinder 148 is actuated to project the piston rod 149, and the pressure roller 147 is pressed against the tire T to increase the contact pressure between the tire T and the rollers 23 and 24. Next, the motor 142 is activated and the belt 145
The rollers 23 and 24 are rotated in the same direction at a constant speed. As a result, the tire T rotates at a constant speed around its axis of rotation. At this time, the mini rollers 37 of the moving bars 35, 36, 48, 49,
47 is in rolling contact with the sidewall portion of the tire T, so the tire T does not vibrate. Next, actuate the cylinder 63 of the bead opening mechanism 61 to project the piston rod 64 and open the opening claw 7.
5, 76 towards the center of the tire T. Then, when the midpoint between the opening claws 75 and 76 reaches the equatorial plane of the tire T, the operation of the cylinder 63 is stopped. Next, the cylinder 59 is actuated to project the piston rod 60 and lower the elevating frame 62. The lowering of the elevating frame 62 is stopped when the opening claws 75 and 76 come into contact with the bead portion C of the tire T. Next, actuate the cylinder 71 to protrude the piston rod 72 and open the opening claw 7.
5 and 76 are separated from each other. At this time, disk 7
7 and 78 push both bead portions C outward to widen the bead interval. At this time, the opening claws 75, 76
Since it is rotatably supported by the holders 73 and 74, it does not adversely affect the tire T. Simultaneously with the operation of the cylinder 63 of the bead opening mechanism 61,
The cylinder 91 of the moving mechanism 121 is operated to cause the piston rod 92 to protrude. As a result, the elevating frame 93 is lowered, and this lowering is caused by the X-ray tube 10
0 can enter the rim space of the tire T, the vehicle stops. Next, the cylinder 98 is actuated to cause its piston rod 99 to protrude. This results in
Only the X-ray tube 100, i.e. the detector 10
9 and 110 are stationary and move along the axis of rotation of the tire T. At this time, the radiation port 101 moves along the movement path E. As mentioned above, since the intersection area D of the fields of view of the detectors 109 and 110 is located on this movement path E, the X-ray tube 1
The relative positional relationship between the X-ray tube 100 and the detectors 109 and 110 can be determined by simply moving the X-ray tube 100 and the radiation port 101 to reach this intersection area D. Further, since this intersection area D is located on the equatorial plane of the tire T, the positional relationship of the X-ray tube 100 with respect to the tire T in the rotational axis direction can be simultaneously determined by the above operation. Next, cylinder 91 again
The piston rod 92 is activated to protrude the piston rod 92, the elevating frame 93, the X-ray tube 100, the detector 10
9 and 110 are lowered together, and X-ray tube 1
00 into the tire T. At this time, since the bead portion C is pushed open by the bead opening mechanism 61, even if the X-ray tube 100 is large, it can be easily inserted into the tire T.
Then, the best part of the tire T to be measured is determined based on the information regarding the size of the tire T, and when the straight line F connecting the radiation port 101 and the detectors 109, 110 intersects with this part, the operation of the cylinder 91 is stopped. . Note that the measurement location of the tire T changes depending on the size of the tire T, but in this invention, information regarding the size of the tire T is taken in from the determination mechanism 4, so the measurement location of the tire T can always be measured. . Next, cylinder 107
is activated, the piston rod 108 protrudes, and the detectors 109 and 110, which had been retracted to avoid interference with the tire T, approach the tire T, completing preparations for measurement. In this state, the cord arrangement of the tire T is inspected, and the principle of this inspection will be explained using FIG. 6 and FIGS. 7a, b, c, and d. now,
Assume that as the tire T rotates, the measurement site of the tire T moves in the direction of the arrow. At this time,
X-rays emitted from the radiation port 101 of the X-ray tube 100 pass through the tire T and then pass through the detector 109,1.
The light is focused by ten slits 131 and converted into light by a scintillator 132. This light is converted into an electrical signal by a detection circuit 133 including a photomultiplier tube. Here, the amount of attenuation of the X-rays differs depending on whether the X-rays are transmitted through the rubber portion K of the tire T or through the cord portion L made of steel, for example. As a result, as shown in FIG. 7a, when the X-rays pass through the rubber part K, a signal of a predetermined value is output from the detection circuit 133, and when the X-rays pass through the cord part L, a signal of a predetermined value is output. A zero signal is output. The output from this detection circuit 133 changes moment by moment depending on the rotation of the tire T. Next, the output from this detection circuit 133 is input to the measuring mechanism 161, and the following operations are performed within this measuring mechanism 161. First, the signal is compared with a preset threshold level;
When the signal value is larger than this level, the H level,
When the signal value is smaller than this level, an L level signal is output, and the waveform of FIG. 7a is shaped into the waveform of FIG. 7b. Next, a pulse is sent from the high-frequency pulse generation circuit to the H gate, which opens only when an H level signal is input, and the L gate, which opens only when an L level signal is input, and passes through the H gate and L gate. The incoming pulses are counted using separate pulse counters. Figure 7c shows the pulse waveform that has passed through the L gate, and
Figure 7d shows the pulse waveform that has passed through the H gate. The pulse counters are reset when no pulse is input for a certain period of time, so the number of pulses in each pulse group is counted each time a pulse group is generated. When the number of pulses in a group of pulses that have passed through the L gate (passed when X-rays are passing through the cord) is greater than the number of pulses corresponding to the diameter of the cord portion L, the cords overlap within the tire T. It is determined that the tire is defective because there is a possibility that the tire is not properly aligned. On the other hand, H
The cords of the tire T are also too far apart when the number of pulses in a group of pulses (passed when the X-ray passes through the rubber part) passing through the gate is greater than the number of pulses corresponding to the specified cord interval. It is determined that the tire is defective. In this way, when the cord arrangement inspection of the tire T is completed, the detectors 109 and 11 are operated in the opposite manner to that described above.
0, the X-ray tube 100 and bead opening mechanism 61 return to their original positions. Further, the rotation of the tire T is also stopped, and the upper and lower guides 41 and 30 are further opened, and the pressing roller 147 is separated from the tire T. Next, the stopper plate 154 is swung from the inclined position H to the horizontal position J to enable the tire T to be ejected, and then the cylinder 151 is actuated to move the piston rod 152.
make it stand out. As a result, the protruding block 153
pushes the tire T toward the stopper plate 154, and the tire T rolls on the stopper plate 154 and is sent to the next process. The above is one cycle of tire cord arrangement inspection work focusing on one tire T, and this cycle is repeated thereafter.

In the above-mentioned embodiments, an X-ray tube was used as the radiation source, but a radioisotope that emits γ-rays or the like may also be used.

As described above, according to the present invention, the radiation source and the detector can be accurately moved to specified positions according to the size of the tire, so that accurate inspection can be performed.

[Brief explanation of drawings]

Fig. 1 is a schematic front view showing one embodiment of the present invention, Fig. 2 is a right side view thereof, Fig. 3 is a right side view showing the lower guide, and Fig. 4 shows the tip of the bead opening mechanism. 5 is a right side view of the X-ray tube and the vicinity of the detector, FIG. 6 is an explanatory diagram for explaining the detection operation, and FIGS. 7a, b, c, and d are waveform diagrams. 4... Judgment mechanism, 53... Holding mechanism, 100...
...Radiation source (X-ray tube), 109,110...
...Detector, 121...Moving mechanism, 150...Rotating mechanism, 161...Measuring mechanism, T...Tire.

Claims (1)

[Claims] 1. A determination mechanism that determines the size of a tire, a holding mechanism that holds the tire in a fixed position, a radiation source that emits radiation, and a system that receives radiation from the radiation source that has passed through the tire. a detector that detects the intensity of the radiation; and a detector that detects the radiation intensity until a straight line connecting the radiation source and the detector intersects the measurement site of the tire determined based on the determination result of the determination mechanism. a moving mechanism that moves the tire; a rotating mechanism that rotates the tire about its rotational axis at a holding position; and a measuring mechanism that measures the tire cord arrangement based on the intensity of radiation detected by a detector when the tire is rotating. A tire cord arrangement inspection machine characterized by comprising: 2. The movement mechanism includes a first movement mechanism that moves the radiation source and the detector integrally in the radial direction of the tire, and a second movement mechanism that moves only the radiation source in the rotation axis direction of the tire, 2. The tire cord arrangement inspection machine according to claim 1, wherein the moving path of the radiation source by the operation of the second moving mechanism is located within the field of view of the detector.