JPH0613506Y2 - Smear device for drums - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention uses a smear (hereinafter, simply referred to as surface contamination) to contaminate the surface of a drum containing radioactive waste with radioactive material. The present invention relates to a smear device for a drum can used when inspecting by a smear method, and particularly to a device having a high reliability of wiping effect on the surface deposit on the drum can.

[Conventional technology]

Conventionally, a drum can smear device 1 as shown in FIG. 8 has been used to inspect the side surface of the drum can for contamination by radioactive substances. Then, FIG. 8 shows a schematic side view of the smearing device 1. In FIG. 8, 2
Is a turntable 4 rotated by a motor 3
Is a drum that stands on the turntable 3, and this drum can 4 usually stores small radioactive waste. In addition, it is a large lump of radioactive waste such as concrete building fragments. May be stored.
Reference numeral 5 denotes four projections provided on the turntable 2 for positioning the drum 4 on the turntable 2. These projections 5 are arranged along one circumference and are arranged in this way. When the drum can 4 is erected inside the four protrusions 5, the axis 4a of the drum can and the rotation center of the turntable 2 are substantially aligned with each other.
Reference numeral 6 denotes a smear mechanism in which the side surface of the drum can 4 mounted on the turntable 2 is pressed by a smear pad 7, and a frame fixed to the same member (not shown) that supports the motor 3 is mounted on the smear mechanism 6. 6a, the above-mentioned smear pad 7 formed by covering a hemispherical elastic base material with a smear cloth, and the smear pad 7 installed in the frame 6a and moved along one plane including the axis of the turntable 2 The smear pad drive section 8 is provided. Further, the smear pad drive section 8 pushes the smear pad 7 by pressing the rod-shaped arm 9 having the smear pad 7 fixed at one end and the other end of the arm 9. Coil spring 10 that is pressed against the side surface of the drum 4
And a drive unit body 1 for moving a movable unit 11 including the smear pad 7 along the axis of the turntable 2 described above.
2 and the movable part 11 described above. In this case, the arm 9 is configured so that the axis of the turntable 2 is oriented vertically.

Since the smearing device 1 is composed of the above-mentioned respective parts except the drum can 4, the drum can 4 as an object to be inspected is erected in the protrusion 5 of the table 2, and then the table 2 is rotated by the motor 3 to rotate the drum can 4. Simultaneously with this, when the movable portion 11 is moved up and down by the drive portion main body 12, the adhering matter attached to the side surface of the drum can 4 is wiped off by the smear pad 7 over the entire side surface. Therefore,
The movable portion 11 that has been wiped off is drawn into the frame 6a by a mechanism (not shown), and the dose of radiation emitted from the smear pad 7 is adjusted by a radiation measuring device (not shown) provided in the frame 6a. By measuring, the side surface of the drum 4 can be inspected for radioactive contamination. In addition, such a radiation measurement is performed by the frame 6a.
Without doing it inside, remove the above-mentioned smear cloth from the smear pad 7, and remove the removed smear cloth into the frame 6a.
In some cases, the apparatus may be brought to an installation location of an external radiation measuring apparatus, where the above-mentioned radiation measurement is performed to inspect the side surface of the drum can 4 for radioactive contamination.

In FIG. 8, since the smear device 1 is configured as described above, the device 1 cannot perform the radioactive contamination inspection not only on the upper surface of the drum can 4 but also on the bottom surface 4b. For this reason, conventionally, the smear device 13 shown in FIG. 9 has been used to wipe off the deposits on the bottom surface 4b of the drum can 4. That is, in FIG. 9, the point greatly different from FIG. 8 is that the drum can 4 is laid sideways, and 14 is the drum can 4 laid sideways.
This drum can rotating device supports the drum can 4 so that the bottom surface 4b of the drum can be pressed vertically by the smear pad 7 and rotates the drum can 4 around its axis 4a. Since the smear device 13 is configured as described above, the bottom surface of the drum can 4 is rotated by rotating the drum can 4 with the rotating device 14 and moving the movable part 11 of the smear pad drive part 8 in the same manner as in FIG. Four
It is possible to wipe off the adhering substance in b with the smear pad 7.

[Problems to be solved by the device]

Since the smear device 1 is configured as described above, it is desirable that the contact pressure between the side surface of the drum 4 and the smear pad 7 be constant. For that purpose, the smear pad is fixed to the frame 6a and the smear pad driving is performed. The distance D between the predetermined position A on the extension of the axis of the arm 9 in the portion 8 and the side surface portion of the drum can 4 with which the smear pad 7 is in contact is irrespective of the rotation of the turntable 2 and the movable portion 11 It is necessary to always be constant regardless of the vertical movement of. However, even if the drum can 4 has a uniform diameter over its entire length, a diameter variation of about ± 10 mm is allowed among many drum cans 4, and the turntable 2 Since the above-mentioned circle formed by the upper protrusion 5 is set in consideration of the maximum diameter of the drum can 4, in practice, the axis 4a of the drum 4 mounted on the turntable 2 and the axis of the turntable 2 are Do not necessarily match. Therefore, in the case of the smear device 1, even if the axis 4a of the drum can 4 is parallel to the axis of the turntable 2 and the drum 4 is formed with a uniform diameter over its entire length, the rotation of the turntable 2 is prevented. Since the distance D changes with the above, the above-mentioned smear pad 7
However, there is a problem in that the reliability of the effect of wiping off adhered substances is low. Then, such a problem of the smear device 1 is that, as shown in FIG. 10, the side surface of the drum can 4 placed on the turntable 2 is inclined with respect to the normal line of the bottom surface 4b of the drum can. It is obvious, of course, that the case becomes more prominent.

In addition, in the smear device 13, the adhering matter is wiped off from the bottom surface 4b of the drum can as described above, but as described above, the drum can 4 may contain a large concrete block. . Therefore, when the drum can 4 is rotated by the rotating device 14, the concrete mass bounces in the drum can 4, so that the drum can 4 does not rotate smoothly and a sudden change in the rotation speed occurs. Therefore, in the case of the smear device 13, the contact state between the smear pad 7 and the drum can bottom surface 4b changes in accordance with a sudden change in the rotation speed of the drum can 4, so that the device 13 also has an effect of wiping off the adhering matter of the smear pad 7. There is a problem of low reliability.

The object of the present invention is to rotate the upright drum can 4 and wipe off the deposits on the side surface of the drum can with the smear pad 7, even if there are some variations in diameter among the many drum cans 4, or if the turntable 2 is used. Even if there is a slight misalignment between the table on which the drum can 4 is mounted and the drum can 4 or the side surface of the drum can 4 is inclined with respect to the normal line of the bottom surface 4b, If the smear pad 7 is used to wipe off the deposits on the bottom surface 4b of the drum can 4 so that the distance D does not change, this wiping can be performed with the drum can 4 standing up. Even in the case, it is to obtain a smear device having a high reliability of the effect of wiping off the adhering matter from the smear pad 7.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, in the present invention, the virtual cylinder is supported by one frame body so as to project from the frame body, and the virtual cylinder is simultaneously contacted by pressing the virtual cylinder perpendicularly to its axis. The virtual cylinder is arranged so that the shaft center is brought into contact with the virtual cylinder so that the shaft center is substantially vertical, and is driven by at least one motor by frictional force between the virtual cylinder and the virtual cylinder around the shaft center. At least four drive rollers that are rotated, a drum can pressing mechanism that presses the drum can so that the side surfaces of the drum can contact all of the drive rollers at the same time, and the side surfaces of the drive roller that are driven by the drum can pressing mechanism. And a smear pad drive section that elastically presses the surface of the drum can pressed by a smear pad. A smear device for a drum can, wherein the drum can that is pressed against a driving roller is rotated by the motor via the driving roller to wipe off adhering material on the surface of the drum can with the smear pad, wherein the smear pad driving section is the driving roller. The smear pad is configured to be movable within a virtual plane including the axis of the virtual cylinder set at or near the portion of the virtual cylinder that is brought into contact with the virtual cylinder. did.

In addition, in the present invention, in the above-described drum can smearing device in which the smear pad driving unit is configured as described above, a support base for supporting the drum can at the bottom surface thereof is provided, and the support base is arranged in the horizontal direction. It is configured so that both translational movement and rotational movement in the horizontal plane are possible.

Further, according to the present invention, in the above-described drum can smearing device having the smear pad driving unit configured as described above, a suspension mechanism for grabbing and suspending the drum can is provided and suspended by the suspension mechanism. The suspension mechanism is configured so that the drum can in the different posture can perform the horizontal translation motion and the rotational motion in the horizontal plane as it is.

[Action]

When the drum can smearing device is configured as described above, the side surface of the portion closest to the frame of the drum can whose side surface is brought into contact with the drive roller by the drum can pressing mechanism has a large or small diameter of the drum can or a drum can on the side surface of the drum can. Regardless of whether there is an inclination with respect to the normal line of the bottom surface or the rotation of the drum can by the drive roller, the drum is always placed at a substantially predetermined position with respect to the frame, and the smear pad is attached to the frame of such a drum can. Since the side surface closest to this side surface or the side surface near this side surface is pressed, the pressing force on the side surface of the drum can of the smear pad is always constant, and the smear with a high reliability of the effect of wiping off adhering substances on the side surface of the drum can of this smear pad. The device will be obtained.

Then, if the support base of the drum can is configured as described above, the initial position of the support base of the drum can is slightly deviated from the normal position, or the side surface of the drum can is inclined with respect to the normal line of the bottom surface. However, since the support base can freely move in the horizontal plane, the side surface of the drum can can be easily brought into contact with the drive roller. Further, since the support base is configured as described above, The drum can be smoothly rotated together with the support base by the drive roller without causing sliding between the drum can and the support base due to the inclination of the drum can bottom with respect to the normal line and the size of the drum can diameter. The pressing force can always be kept constant. Therefore,
Even with such a support, it is possible to obtain a smear device having a highly reliable effect of wiping off adhering substances on the drum can side surface of the smear pad.

Then, when the above-mentioned suspension mechanism for suspending the drum can is further provided, it is clear that it is easy to bring the smear pad into contact with the bottom surface of the drum can so as to generate a predetermined pressing force, and it is also large-sized. With a drum can containing the concrete block, the drum can be smoothly and easily rotated around its axis. Therefore, when the drum can is rotated around its axis while the smear pad is in contact with the bottom face, the pressing force of the smear pad against the bottom face of the drum can does not fluctuate, and the suspension mechanism is eventually provided. As a result, it is possible to obtain a smear device having a highly reliable effect of wiping off adhering substances from the bottom surface of the drum can of the smear pad.

〔Example〕

FIG. 1 is a plan view of an essential part of the first embodiment of the present invention, and FIG. 2 is a view taken in the direction of arrow B in FIG. In both figures,
Reference numeral 15 denotes a frame body 161-164 corresponding to the frame 6a of FIG. 8 to which the drive body 12 of the smear pad drive portion 8 is fixed.
Are drive rollers axially supported by the frame body 15 so as to project from the frame body. In this case, the rollers 161 and 162 are fixedly coupled by a shaft 171, and the rollers 163 and 164 are a shaft 172. Are fixedly bound by. The rollers 161-164 have the same diameter, the axes 171 and 172 are parallel to each other, and the main parts are configured such that the axes 171 and 172 are substantially vertical. 181 is a sprocket 191 fixed to a shaft 171, driven by a chain 201
A motor for rotating the rollers 161 and 162 via 171 and an 182 for rotating the rollers 163 and 164 via the shaft 172 by driving a sprocket 192 fixed to the shaft 172 by a chain 202. With a motor, 211 ~ 2
Reference numeral 14 is a cantilever-shaped support member having one end fixed to the frame body 15, 221 is a crankshaft whose both ends are pivotally supported by the free ends of the support members 211 and 212, and 222 is both ends supported. A crankshaft pivotally supported on the free ends of the members 213 and 214. The crankshafts 221 and 222 are both provided parallel to the shafts 171 and 172.

Then, cranks 241 and 242 driven by piston portions 231b and 232b of air cylinders 231 and 232 having cylinder portions 231a and 232a fixed to the frame body 15 are fixed to the crank shafts 221 and 222, respectively. One end of each of the shafts 221, 222 is located near each end of the shaft 221, 222.
Cantilever arms 251-254 fixed to 22 are provided. 261 is rotatably supported by free ends of arms 251 and 252 in the vicinity of both ends, and rollers 271 and
272 is a rotating shaft fixed, 262 is an arm near each end
Rotating shafts 253 and 254 are rotatably supported at their free ends, and rollers 273 and 274 are fixed to both ends of the rotating shafts 261 and 262, respectively. Reference numeral 28 denotes a support base that has a flat upper surface 28a for supporting the bottom surface 4b of the drum can 4.
In this case, the support base 28 is fixed to the frame body 15 via a mechanism (not shown), and the main part is configured so that the upper surface 28a is substantially horizontal. Reference numeral 29 is a smearing device having the respective parts shown in the figure except the drum can 4.

The smearing device 29 is configured as described above, and further, the piston portions 231b and 23 of the air cylinders 231 and 232.
By extending 2b, a virtual cylinder having a diameter close to the diameter of the drum 4 can be held between the four drive rollers 161-164 and the four rollers 271-274. That is, in this case, the piston parts 231b, 232
When b is simultaneously extended, the virtual cylinder is pressed in a direction perpendicular to its axis so that the cylinder is brought into contact with the drive rollers 161-164 at the same time. When brought into contact with each other, the shafts 171 and 172 for supporting these rollers are arranged as described above, so that the axis of the virtual cylinder is naturally arranged substantially vertically.

It is clear that when the rollers 161-164 are rotated by the motors 181,182 while the virtual cylinders are held between the rollers 161-164 and 271-274, the virtual cylinders rotate about their axes, and thus The drive rollers 161-164 are rotatably supported by one frame body 15 so as to project from the frame body,
And by pressing the virtual cylinder perpendicularly to its axis, the cylinders are brought into contact at the same time, and as a result, the axis is arranged so as to be substantially vertical, and the virtual cylinder is driven by the motors 181, 182. It can be said that the roller is configured to rotate the virtual cylinder around its axis by the frictional force between the cylinder and the cylinder.

Then, further, in the smear device 29, when the drum can 4 is made to stand upright on the support base 28 and then the piston portions 231b and 232b of the air cylinders 231 and 232 are extended, as in the case of the virtual cylinder described above, 4 rollers 161-164
Since the respective parts are configured so as to be held between the support members 211 to 214 and the crankshaft,
221,222, air cylinders 231,232, cranks 241,242, arms 251-254, rotary shafts 261,262, and rollers 271-274,
It can be said that the drum can pressing mechanism 30 is configured to press the drum can 4 such that the side surface of the drum can 4 contacts all of the drive rollers 161-164 simultaneously.

In the smear device 29, the drum can pressing mechanism 3
The drive unit main body 12 of the smear pad drive unit 8 that elastically presses the side face of the drum can 4 whose side face is pressed by the drive rollers 161-164 by 0 with the smear pad 7 is fixed to the frame body 15 by means not shown. Further, the smear pad drive unit 8 has a predetermined virtual plane P including the axis C of the above-mentioned virtual cylinder abutted on the drive rollers 161-164.
The smear pad 7 is configured so as to be movable therein, and in this case, the virtual plane P coincides with the plane of symmetry between the axis center of the axis 171 and the axis center of the axis 172 which are arranged in plane symmetry. Therefore, it is obvious that this plane P is a virtual plane including the axis C of the virtual cylinder set at the portion closest to the frame body 15 of the virtual cylinder brought into contact with the drive rollers 161-164.

In FIGS. 1 and 2, since the smear device 29 is configured as described above, the drum can 4 upright on the support base 28 is pressed by the drum can pressing mechanism 30 and abuts against the drive rollers 161-164. Then, the drum can 4 whose side surface is brought into contact with the driving rollers 161-164 is driven by the driving rollers 161-164.
It is rotated by the motors 181, 182 via the movable unit 1 by the drive unit main body 12 in the smear pad drive unit 8.
By moving 1 along the axis of the shaft 171 or 172, the smear pad 7 can wipe off the deposits on all side surfaces of the drum can 4.

Since the smear device 29 wipes off the adhered matter on the side surface of the drum can as described above, in this case, the axial center of the arm 9 in the smear pad drive section 8 is fixed to the frame body 15. The distance D between the predetermined position A on the extension and the side surface portion of the drum can 4 in contact with the smear pad 7 depends on the size of the diameter of the drum can 4 or the normal line of the bottom surface 4b of the drum can 4 to the side surface of the drum can 4. The presence or absence of inclination with respect to the rotation of the drum can 4 by the drive rollers 161-164, and the movable portion 1 of the smear pad drive portion 8.
It is always constant regardless of the above-mentioned movement of No. 1 and the initial position of the drum 4 on the support base 28. Therefore, in the smear device 29, the smear pad 7 always presses the side surface of the drum can 4 with a predetermined pressure, so that a highly reliable wiping effect for the adhered matter on the side surface of the drum can can be obtained.

FIG. 3 is a side view of an essential part of the second embodiment 49 of the present invention, and this figure corresponds to FIG. Then, a part different from FIG. 2 of FIG. 3 is changed to the support base 28 of FIG. 2 so that both horizontal translational motion and rotational motion in the horizontal plane are possible. Since the support base 31 is provided, the mechanism of the support base 31 is shown in FIGS.
It is as shown in the figure. Then, FIG. 4 is a cross-sectional view including the axis 32a of the thick disk-shaped turntable 32 constituting the support 31, and FIG. 5 is a view taken in the direction of arrow E in FIG.

In FIGS. 3 to 5, the turntable 32 includes a drum-shaped intermediate body 33 and a coupling screw 34 on the upper surface of the intermediate body 33.
And a thick disk-shaped lower plate 37 fixed to the lower surface of the intermediate body 33 by a coupling screw 36. Further, the lower plate 37 is provided with a shaft. Insert four centering mechanisms 38, which are formed so as to radially project from the center 32a at an angular interval of 90 degrees and are axially symmetrical with respect to the axis 32a, and one end side of each of the centering mechanisms 38. The four cylindrical bottomed holes 39 are provided. The centering mechanism 38 is provided with a coil spring 40 inserted into the bottom of the bottomed hole 39 and a stroke bearing 41 at one end inserted into the spring 40 and projected from the bottomed hole 39. And a linear ball which is fitted and fixed to the opening end side of the bottomed hole 39 and the cylindrical body 42 is fitted and inserted therein to smooth the movement of the cylindrical body 42 in its axial direction. Bearing 43 and spring 4 in cylinder 42
0 and the bearing 43, the adjusting screw 44 is provided to adjust the amount of protrusion of the columnar body to the outside of the bottomed hole 39.

Reference numeral 45 denotes a plate-shaped pedestal which is provided with a circular through hole 45a and is fixed to the frame body 15 by means not shown.
Is a cylindrical guide ring fixed to the lower surface of the pedestal 45 with a fixing screw 47. In this case, the ring 46 is provided so that the axis of the guide ring 46 coincides with the axis of the through hole 45a. The pedestal 45 is provided so that the axis of the hole 45a is vertical. A plurality of ball bearings 48 are arranged in a circular shape on the upper surface of the pedestal 45, and the upper plate 35 of the turntable 32 having the intermediate body 33 loosely inserted in the through hole 45a is supported on the lower surface of the upper plate. 4 and 5, when the upper plate 35 of the turntable 32 having the intermediate body 33 inserted in the through hole 45a is supported by the ball bearing 48, the stroke of each of the four centering mechanisms 38 is increased. Each part is configured so that the bearing 41 is brought into contact with the inner surface of the guide ring 46 by the pressing force of the spring 40. The adjustment screw 44 in the centering mechanism 38 is provided to match the axis 32a of the turntable 32 with the axis of the through hole 45a in the pedestal 45 when nothing is placed on the upper plate 35 of the turntable 32. In addition, the support base 31 is composed of the respective parts shown in FIGS. 4 and 5.

In the smear device 29 shown in FIG. 1 and FIG.
Since 8 is a pedestal fixed to the frame body 15, the drum can pressing mechanism 30 rolls the drum can 4 on the support base 28.
When it is held between 271 to 274 and the drive rollers 161-164, sliding occurs between the support base upper surface 28a and the drum can bottom surface 4b. Then, again, in this case, when the drum can 4 is rotated by the drive rollers 161-164, it is clear that the top surface 28a and the bottom surface 4b slide. That is, the smear device 29 has a drawback that the support base 28 is easily damaged due to the above-mentioned sliding, and the drum can 4 does not rotate smoothly due to the above-mentioned sliding, so that the smear pad 7 adheres to it. There is a drawback that the improvement of the wiping effect is insufficient.

However, in the smear device 49 shown in FIG.
Since 1 is configured as described above, this support base 31
Then, it is apparent that the turntable 32 on which the drum 4 is placed is constructed so that both the translational movement in the horizontal direction and the rotational movement in the horizontal plane are possible. Therefore, when the support base 31 is configured as described above, when the drum can 4 mounted on the turntable upper plate 35 is brought into contact with the drive rollers 161-164 by the drum can pressing mechanism 30, the upper plate 35 and the bottom surface of the drum can. It is clear that sliding does not occur between the shaft 4a of the drum can and the shaft 32a of the turntable 32a of the turntable. Drive roller 161
Even when the drum can 4 is rotated by ˜164, the upper plate 35 and the drum can bottom surface 4 do not depend on the diameter of the drum can.
It is clear that sliding with b does not occur. Therefore,
In such a smear device 49, since the support base 31 is not damaged and the drum can 4 rotates smoothly, the smear pad 7 is more effective in wiping off the adhering substances than the smear device 29 described above. The advantage is that Although the smear devices 29 and 49 have the above-mentioned advantages, they have a drawback that the adhering material cannot be wiped off the bottom surface 4b of the drum can.

FIG. 6 is a side view of a third embodiment 50 of the present invention. The smear device 50 is a smear device capable of wiping off the adhering substance on the bottom surface 4b of a drum can. In FIG. 6, reference numeral 51 denotes a smear device main body portion corresponding to a smear device main body portion 29a composed of the constituent elements of the smear device 29 excluding the support base 28, and 52 denotes the drum can 4
With a suspension mechanism that grabs and hangs the upper edge 4c of
In the smear device main body portion 51, the smear pad drive portion 80 corresponding to the above-mentioned smear pad drive portion 8 is provided in the drive portion main body 8
1, the bar-shaped arm 82 having the smear pad 7 attached upward at its tip is configured to project from the frame 15 in a horizontally expandable and contractible manner. In this case, the smear pad 7 is similar to that in the smear pad drive unit 8. In addition, the object is elastically pressed.
Then, the suspension mechanism 52 has a grip portion 54 provided with three claws 53 for gripping the upper edge 4c of the drum can 4, a suspension portion 55 for suspending the grip portion 54, and a suspension portion. As shown in FIG. 7, the suspension 55 includes a control unit 56 that controls the movements of the suspension unit 55 and the grip unit 54. Has become.

That is, in FIG. 7, reference numeral 57 designates a drum-shaped cylinder having bottoms at both ends and circular through holes 57a and 57b provided at both ends, and 58 is a cylinder 57 by means not shown in which one end is fitted into the through hole 57b. Fixed to the cylinder, 59 is the cylinder 57
Six triangular plate-like ribs projecting from the outer surface of the tubular body consisting of the ribs 58 and 58 to the outside of the tubular body. These ribs 59 are three pairs of two ribs 59 arranged in parallel, and a pair of 120 degrees. Are arranged at an angular interval of. Then, the ribs 59, 59 in each pair are fixedly coupled at their tips by the coupling member 60, and the ribs 59, 5 are also coupled.
A base portion of the hydraulic cylinder 61 is pivotally supported between the cylinders 9 in the vicinity of the cylinder 58, and the above-mentioned claw 53 is pivotally supported in the vicinity of the coupling member 60. Then, the tip end of the piston 61a and the base of the claw 53 in the cylinder 61 are rotatably coupled via the pin 62, and the above-mentioned gripping portion 54 is connected to the claw 53 and the pin 62 as described above. It is composed of a hydraulic cylinder 61, a coupling member 60, a rib 59, and cylinders 57 and 58.

Similarly to the cylinder 57, 63 is a drum-shaped cylinder having bottoms at both ends and circular through holes 63a and 63b provided at both ends.
Reference numeral 4 denotes a cylinder, one end of which is fitted into the through hole 63b and fixed to the cylinder 63 by means not shown, and the other end of which is connected to the tip of a cylindrical robot arm 66 through a pin 65. As shown in FIG. 6, the base portion of 66 is connected to the other end of the robot arm 67 whose one end is supported by the control unit 56 through a mechanism (not shown).

In FIG. 7, reference numeral 68 denotes a cylindrical body which is commonly provided through the through hole 57a of the cylinder 57 and the through hole 63a of the cylinder 63, which are opposed to each other.
7 is a circular flange accommodated in 7, 70 is an annular collar fixed in the middle of the cylindrical body 68 and accommodated in the cylinder 63, and a thrust bearing 71 is provided on the upper surface of the flange 69, and the lower surface of the collar 70. Is provided with a ball bearing 72. 73 has one end fixed to a side surface of the cylindrical body 68 in the vicinity of an end of the cylindrical body 68 on the side of the collar 70, and the other end through a through hole 63c provided in the side surface of the cylinder 63. Guide rods projected outside the cylinder 63. In this case, four guide rods 73 are provided in a cross shape on the cylindrical body 68. Reference numeral 74 is a coil spring in which the guide rod 73 is provided so as to penetrate in the cylinder 63.

In FIG. 7, since each part is configured as described above, the cylinder 64 is connected to the robot arm 66 via the pin 65.
Then, the gripping portion 54 is hung from the cylinder 63 through the spring 74, the guide rod 73, the bearings 71 and 72, the collar 70, the coupling body 75 including the flange 69 and the cylindrical body 68. Thus, in this case, the gripping portion 54 is rotatable about the cylindrical body 68 due to the thrust bearing 71, and the connecting body 75 is limited to the internal width of the cylindrical body 63, but the ball bearing 72. It is clear that, because of this, translational movement in the horizontal direction is free. The suspension portion 55 shown in FIG. 6 is composed of the connecting body 75, the cylinders 63 and 64, the pin 65, and the robot arms 66 and 67 described above.

In FIG. 6, since the smear device 50 is configured as described above, the three pawls 53 are extended by extending the piston 61a of the hydraulic cylinder 61 through a means (not shown) based on the operation of the controller 56. The upper edge 4c of the drum can 4 can be grasped by the operator, and the arms 66 and 67 can be moved by the control unit 56 to lift the drum can 4 grasped by the grasping unit 54 and convey it to the vicinity of the smear device main body 51. You can Therefore, when the drum 4 conveyed near the main body 51 of the smear device is held and rotated between the drive rollers 161-164 and the rollers 271-274 in the same manner as in the smear device 29, the smear pad drive part is generated. By extending and contracting the arm 82 of 80, it is possible to wipe off the adhering matter with the smear pad 7 over the entire bottom surface 4b of the drum can 4. Of course, in this case, it is natural that the control unit 56 drives the suspension unit 55 in advance to adjust the bottom surface 4b of the drum can so that the bottom surface 4b can be wiped by the smear pad 7.

In the smear device 50, the adhering matter is wiped off from the drum can bottom surface 4b as described above. In this case, the connecting body 75 for suspending the gripping portion 54 is configured as described above. , Robot arm 66 and cylinder 6
Even if the connecting portion with 4 is stationary, the drum can 4 hung by the suspension mechanism 52 is capable of translational movement in the horizontal direction and rotational movement in the horizontal plane in the same posture, and thus the drive roller. Even if the shaft center 4a of the drum can 4 rotated by 161-164 and the shaft center of the cylinder 64 are deviated, the drum can 4 rotates smoothly. Then, further, in this case, since the drum can 4 is suspended, it is clear that the drum can 4 smoothly rotates even if the large-sized concrete lump is accommodated in the drum can 4. Therefore, according to the smearing device 50, the bottom surface 4b of the drum can 4 can be wiped off with high reliability.

In each of the above-described embodiments, four drive rollers are provided for convenience of 161-164, and two motors 181, 182 for driving these drive rollers are provided. However, in the present invention, the drum can is There may be provided five or more drive rollers for rotating the drive roller, and the number of motors for driving these drive rollers may be one or three or more.

[Effect of device]

As described above, in the present invention, a single frame is axially supported so as to project from the frame, and the virtual cylinder is pressed at the same time by pressing the virtual cylinder perpendicularly to its axis. Are arranged so that the shaft center is substantially vertical, and are driven by at least one motor to rotate the virtual cylinder around the shaft center by the frictional force with the virtual cylinder. At least four drive rollers, a drum can pressing mechanism that presses the drum can so that the side surfaces of the drum can contact all of the drive rollers at the same time, and a drum can whose side surface is pressed by the drive roller by the drum can pressing mechanism. Equipped with a smear pad drive part that elastically presses the surface with a smear pad, and drives the drum can pressed by the drive roller by the drum can pressing mechanism A smear device for a drum can, which is rotated by the motor via a roller to wipe off the deposits on the surface of the drum can with the smear pad, wherein the smear pad drive part is the frame body of a virtual column abutted against a drive roller. It is assumed that the smear pad can be moved within a virtual plane including the axis of the virtual cylinder set at or near the portion closest to.

Therefore, when the smear device for drum cans is configured as described above, the side surface of the portion closest to the frame body of the drum can whose side surface is brought into contact with the drive roller by the drum can pressing mechanism has a large or small diameter, Regardless of whether the side surface is inclined with respect to the normal to the bottom surface of the drum can or the rotation of the drum can by the driving roller, it is always arranged at a substantially predetermined position with respect to the frame body. Since the side surface closest to the frame body or the side surface near this side surface is pressed, in the present invention, the pressing force of the smear pad against the drum can side surface is always constant, and as a result, the smear pad against the drum can side surface. There is an effect that a smear device having a high reliability of the effect of wiping off adhered substances can be obtained.

Further, in the present invention, in the above-mentioned drum can smearing device in which the smear pad driving unit is configured as described above, a support base for supporting the drum can on its bottom surface is provided, and the support base is translated in the horizontal direction and the horizontal plane. It is configured so that it can be rotated with the inside.

Therefore, if the drum can support base is configured as described above, the initial position of the drum can on the support base may be slightly displaced from the normal position, or the side surface of the drum can may be inclined with respect to the normal line of the bottom surface. In addition, since the support base can freely move in the horizontal plane, the side surface of the drum can can be easily brought into contact with the driving roller. The drum can is smoothly rotated together with the support base by the drive roller without causing sliding between the drum can and the support base due to the inclination with respect to the line and the size of the drum can diameter.
Therefore, the pressing force of the smear pad on the side surface of the drum can can be always kept constant. Therefore, the present invention has an effect that it is possible to obtain a smear device having a highly reliable effect of wiping off adhering substances on the side surface of a drum can of a smear pad even with such a support.

Then, further, in the present invention, in the above-described drum can smearing device having the smear pad driving unit configured as described above, a suspension mechanism for grabbing and suspending the drum can is provided, and is suspended by this suspension mechanism. The suspension mechanism was configured so that the drum can in this posture can be translated in the horizontal direction and rotated in the horizontal plane in the same posture.

Therefore, when the above-mentioned suspension mechanism for suspending the drum can is provided, it is obvious that it is easy to bring the smear pad into contact with the bottom surface of the drum can so that a predetermined pressing force is generated, and a large concrete block is Even with the drum can stored, the drum can be smoothly and easily rotated around its axis. Therefore, when the drum can is rotated around its axis while the smear pad is in contact with the bottom surface, the pressing force of the smear pad against the bottom surface of the drum can does not fluctuate, and the above suspension mechanism is eventually provided. As a result, the present invention has an effect of obtaining a smear device having a highly reliable effect of wiping off adhering substances on the bottom surface of a drum can of a smear pad.

[Brief description of drawings]

FIG. 1 is a plan view of an essential part of the first embodiment of the present invention, FIG. 2 is a view taken in the direction of arrow B in FIG. 1, and FIG. 3 is a second view of the present invention.
FIG. 4 is a side view of the main part of the embodiment, FIG. 4 is a cross-sectional view of the main part of the support base used in the embodiment of FIG. 3, FIG. 5 is a view taken in the direction of arrow E in FIG. 4, and FIG. FIG. 7 is a side view of the third embodiment, FIG. 7 is a detailed configuration explanatory view of essential parts in FIG. 6, FIG. 8 is a side view of a conventional drum can smear device, and FIG. 9 is a drum can different from that of FIG. FIG. 10 is a side view of the smearing device, and FIG. 10 is an explanatory view of problems of the drum can smearing device shown in FIG. 1,13,29,49,50 ... Drum can smear device, 3,181,182 ... Motor, 4 ... Drum can, 4a ...
… Bottom of drum, 7 …… Smear pad, 8,80 ……
Smear pad drive, 15 ... Frame, 161,162,163,164
...... Driving roller, 28, 31 …… Supporting base, 30 …… Drum can pressing mechanism, 52 …… Suspension mechanism, C …… Virtual cylinder axis center, P …… Virtual plane.

Claims (3)

[Scope of utility model registration request] 1. A frame is rotatably supported by one frame so as to project from the frame, and the virtual columns are simultaneously brought into contact with each other by pressing the virtual column perpendicularly to its axis, and as a result, the virtual columns are brought into contact with each other. At least four shafts are arranged such that their axes are substantially vertical and are driven by at least one motor to rotate the virtual columns around the axes by a frictional force between the virtual columns. Individual driving rollers, a drum can pressing mechanism that presses the drum can so that the side surfaces of the drum can contact all and simultaneously of the driving rollers, and the drum can whose side surface is pressed by the driving roller by the drum can pressing mechanism. A smear pad drive section that elastically presses the surface with a smear pad, and the drive roller is pressed against the drive roller by the drum can pressing mechanism. A smear device for a drum can, wherein a drum can is rotated by the motor via the drive roller to wipe off adhering material on the surface of the drum can with the smear pad, wherein the smear pad drive part is brought into contact with the drive roller. The smear pad for a drum can, wherein the smear pad is configured to be movable within a virtual plane including an axis of the virtual cylinder set at a portion closest to the frame of the virtual cylinder or in the vicinity thereof. apparatus. 2. The smear device according to claim 1 of the utility model registration, wherein a support base for supporting the drum can on its bottom surface is provided, and the support base is translated in a horizontal direction and rotated in a horizontal plane. A smear device for drums, which is characterized in that it can be used together with. 3. The smearing device according to claim 1, wherein a utility model is registered, and a suspension mechanism for grabbing and suspending a drum can is provided, and the suspension state of the drum can is maintained as it is. A drum can smear device, characterized in that the suspension mechanism is configured so that it can perform translational movement in the horizontal direction and rotational movement in a horizontal plane.