JP2504530B2 - Can body rotating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial field of application) The present invention is provided, for example, on a circumferential surface of a drum body in which radiation waste is enclosed while rotating the body of the drum body. The present invention relates to a rotating device for a can that reads an RI label (radioactive label) with an image sensor to measure the amount and distribution of radiation.

(Prior Art) In a conventional rotating device of this type, two pairs of rollers, in which a pair of rollers are spaced apart from each other and arranged in parallel, are provided on the same plane, and four rollers of these rollers make an internal The peripheral surface of a can body (hereinafter referred to as a package can body) in which the radioactive waste is enclosed is supported, and an image sensor is arranged in the middle of the two roller pairs. Each roller is driven by a motor to rotate, the can body is rotated by the torque of these rollers, and the RI mark provided on the peripheral surface of the can body is read by the image sensor during this rotation.

(Problems to be Solved by the Invention) What is required of such a rotating device is that the rotation of the package can is stable and the RI marker can be accurately read by the image sensor.

However, in the conventional rotating device, four rollers are held at a fixed position, and the package can body is supported at four points by these four rollers.
Since the package can rotates in the state of being supported at points, if the package can body has irregularities or distortion, the package can body floats and slides from the drive roller during rotation, and the torque of the roller changes. The state that the power is not transmitted to the body temporarily occurs, and as a result, the rotation operation becomes unstable, and the package can body largely swings and displaces. Therefore, the RI marker can be read accurately by the image sensor. There was a difficulty that made it difficult.

The present invention was made by paying attention to such points,
The purpose is that even if there are irregularities or distortion on the peripheral surface of the can body, the torque of the driving roller can always be accurately transmitted to the can body and can be stably rotated. An object of the present invention is to provide a rotating device for a can body that can suppress displacement caused by rocking.

[Structure of the Invention] (Means for Solving the Problem) In order to solve such a problem, the present invention provides two roller pairs in which a pair of rollers are spaced from each other and arranged in parallel on the same plane. , The rollers of the pair of rollers support and rotate the peripheral surface of the can body, and a sensor reads a mark provided on the peripheral surface of the can body during the rotation. It is supported by a fixed frame, at least one roller of which is connected to a drive source, and each roller of the other roller pair is supported by a movable frame whose intermediate portion is rotatably supported. An urging member for elastically urging the both end portions upward is disposed in the above, and the can body is rotated by the torque of the roller connected to the drive source.

(Operation) Since the rollers of one roller pair are supported by the rotatable movable frame, the can body has an equalizer-type support structure, so that the can body can be moved even if the peripheral surface of the can body has irregularities or distortion. The rotation of the frame causes the rollers to move so as to follow the irregularities and distortions of the rollers, so that the peripheral surface of the can body does not float up from the rollers and slides. Therefore, the torque of the driving roller is surely transmitted to the can body so that the can body rotates stably, and both ends of the movable frame are always elastically moved upward by the urging body. Since the movable frame is urged to rotate, the movable frame does not rotate more than necessary when the movable frame rotates due to unevenness or distortion of the peripheral surface of the can body, and the displacement due to the swinging of the can body is prevented. Is regulated to the minimum necessary, and The reading of the sign by the server is always performed accurately and without error.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a base, and a pair of support bases 2.3 are provided on the upper surface of the base 1 so as to be spaced apart from each other and face each other. A pair of fixed frames 4.4 is provided on the upper surface of the one support base 2,
A driving roller 5.5 is rotatably supported on each of the fixed frames 4.4. These rollers 5.5 are arranged so as to be separated from each other and juxtaposed with each other.
The a.5a projects inside the fixed frame 4, and the sprocket 6.6 is attached to the projecting end. A motor 8 is provided as a drive source on the support base 2, and the motor 8 is provided with a speed reducer 9. The output shaft 9a projects from the speed reducer 9 inside the fixed frame 1, and the sprocket 10 is attached to the projecting end. Has been. And chain 11.11 is respectively hung between this sprocket 10 and the sprocket 6.6,
As a result, each roller 5.5 is driven via the speed reducer 9 in response to the activation of the motor 8 to rotate in the same direction and at the same speed.

A movable frame 14 is provided on the other support base 2,
The movable frame 14 is rotatably supported on the support base 2 via a pin 15 at an intermediate portion thereof. Then, rollers 16.16 for driving the upper surfaces of both ends of the movable frame 14.
Is rotatably attached. These rollers 16.16 are provided in parallel with each other on the same plane as the driving roller 5.5 so that their axis lines coincide with each other, and coil springs 17.17 are respectively provided as biasing members on the lower surfaces of both ends of the movable frame 14. Both ends of the movable frame 14 are elastically biased upward by these coil springs 17.17.

Further, an image sensor 18 for reading the RI mark is provided in an intermediate portion between the support bases 2 and 3, and a reading portion 18a of the tip end surface of the image sensor 18 is arranged near the center line of the pin 15. ing.

In the rotating device configured as described above, the package can a is first placed on each roller 5.5.16.16, and the package can a is supported by these rollers 5.5.16.16.
In this state, the motor 8 is energized and activated, and the driving roller 5.5 rotates in response to this activation, the torque of this rotation is transmitted to the package can a, and the package can a rotates. Roller 16.16 for driven with body a
Is driven to rotate. During this rotation, the RI marker b provided on the peripheral surface of the package can a is read by the image sensor 18.

Here, the driven roller 16.16 is attached to the movable frame 14 which is rotatable around the pin 15 as a fulcrum. Therefore, the package can a has a support structure of an equalizer type, and the peripheral surface of the package can a. Even if there are irregularities or distortion, the rotation of the movable frame 14 causes the driven roller 16.16 to rotate.
Move so as to follow the irregularities and distortions, and therefore the peripheral surface of the package can a does not float up from the roller 5.5.16.16 and slide, and the peripheral surface of each roller
5.5.16.16 is always reliably contacted, and therefore the torque of the driving roller 5.5 is reliably transmitted to the package can body a so that the package can body a is stably rotated. Coil springs 17.17 are arranged on the lower surface sides of both ends of the movable frame 14, and both ends of the movable frame 14 are always elastically urged upward by the coil springs 17.17. When the movable frame 14 rotates due to unevenness or distortion of the peripheral surface of the body a, the movable frame 14 does not rotate more than necessary, and therefore the displacement due to the swing of the package can body a is minimum. As a result, the RI marker b is always accurately read by the image sensor 18 without any error.

Since the coil spring 17.17 does not receive the load of the package can body a but only suppresses the swinging force of the package can body a and maintains the balance thereof, even if the weight of the package can body a increases or decreases. The height position of the can a does not change. The center of swing of the package can a is the center of rotation of the movable frame 14, that is, the pin 15.
Therefore, the displacement of the swing of the RI marker b when the package can a rotates and the RI marker b moves to the lower side of the package can a is much larger than that of the central axis portion of the package can a. Small and reading part 18 of the image sensor 18
Since a is placed near the center line of the pin 15,
The RI label b can be read more accurately and with high accuracy. Further, since the image sensor 18 is arranged in a so-called dead space below the package can a, there is an advantage that the entire rotating device is compact.

In the above-mentioned embodiment, both the rollers 5.5 supported by the fixed frame 4 are connected to the motor 8 so as to be driven respectively. However, since the package can a always contacts both rollers 5.5 properly. , Package can a
It is also possible to drive only one roller 5 to rotate the package can a depending on the weight and size of the package can. Further, the present invention is not limited to the case of rotating the package can body enclosing the radioactive waste, and may be the case of rotating the other can bodies and reading the mark on the peripheral surface thereof with an appropriate sensor. Good.

[Effects of the Invention] As described above, according to the present invention, even if the peripheral surface of the can body has irregularities or distortion, the can body can always be stably rotated and the can body can be shaken. There is an effect that displacement due to movement can be suppressed to be small, and therefore a marker provided on the peripheral surface of the can can be accurately and accurately read by a sensor.

[Brief description of drawings]

1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a front view thereof, FIG. 3 is a right side view thereof, and FIG. 4 is a left side view thereof. 4 ... Fixed frame, 5 ... Roller, 8 ... Motor (driving source), 14 ... Movable frame, 16 ... Roller, 18 ... Image sensor (sensor).

Claims (1)

(57) [Claims] 1. A pair of rollers in which a pair of rollers are spaced apart from each other and arranged in parallel are provided on the same plane, and the peripheral surface of the can body is supported and rotated by each roller of these roller pairs, and this rotation is performed. In a sensor for reading a mark provided on the peripheral surface of a can body, each roller of the one roller pair is supported by a fixed frame, and at least one of the rollers is connected to a drive source, and the other roller is connected. Each pair of rollers is supported by a movable frame whose middle portion is rotatably supported, and urging bodies that elastically urge the both ends of the movable frame upward are disposed at both ends of the movable frame. A rotating device for a can body, wherein the can body is rotated by a torque of a roller connected to a drive source.