JPS62888A - Smear pad rotary mechanism - Google Patents

Abstract

PURPOSE:To simplify the constitution of a smear pad rotary mechanism and to secure its control operation by providing a specific rotation stop position between a smear pad and a rotation changeover position and evading the abutting between the smear pad and the projection part of a drum can. CONSTITUTION:The rotary mechanism 81 is provided with specific intermediate rotations top positions, i.e. rotation stop positions of every 45 deg. in the middles of rotation stop sections of every 90 deg. where with a driving motor 56 is driven, a Geneva gear 58 has its circumference of 360 deg. divided equally by eight and smear pads 4 and 4A are alternated successively. Therefore, when the smear pads 4 and 4A smear the drum can 1 and reaches the projection part 5, they are rotated by 45 deg. to move smear pad fitting parts 34 and 36 upward linearly as they are, but the smear pads 4 and 4A move without contacting the projection part 5. Their rotational positions are detected by eight equally divided slits of a pad position detection plate 59 and a photoelectric switch 60 and controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to
This invention relates to a smear pad rotation mechanism that applies a predetermined rotation angle to the smear pad of a drum smearing device for inspecting the blush contamination density over the entire surface of the top and bottom surfaces by a smear method.

[Prior art and its problems]

Radioactive waste generated at nuclear power plants and the like is separated into solids and liquids, the solids are incinerated and compressed into 6 parts, and the liquids are concentrated, poured into cement or asphalt, etc., and stored in drums and solidified. In order to reduce the effects of radiation exposure on workers when transporting the drums after storage, the equipment is designed to prevent the surfaces of the drums from becoming contaminated during storage. However, it is necessary to inspect the surface of the drum for contamination when it is transported out of the controlled area to the solid waste storage area and when it is transported out of the business for final flowering. For this purpose, the drum smearing device is equipped with a smear band attachment part 2 for inspecting radiation contamination on the surface of the drum 10 as shown in FIG. . A cross-shaped pad arm 3 is rotatably provided at the tip of the smear pad attachment portion 2, and one smear pad 4 is attached to each tip of the pad arm 3. By the way, Sumiyapad 4 is in a drum (le)
It is possible to smear the surface of a rotating drum can by pressing it against the surface and moving it in a linear direction. However, about 3
The smear pad 4 may come into contact with a projecting portion 5 such as a protrusion of about 0si+ or a stopper (not shown) provided on the surface of the drum 10, and there is a risk of damaging the smear pad attachment portion 2. In order to prevent this damage, it is necessary to release the smear pad 4 from the protrusion 5. In this round,
A guide plate 8 is provided on the mounting plate 7 of the smear pad mounting portion 2 to prevent the smear pad 4 from coming into contact with the projecting portion when the smear pad mounting portion 2 moves in the linear direction A-AK by a moving mechanism (not shown). (It is moved in the direction of the arrow B, and damage to the smear butt attachment part 2 is avoided. In addition, as shown in FIG. However, all such mechanisms
There have been problems in that the configuration is complicated and the price is high.

[Purpose of the invention]

In view of the above-mentioned points, it is an object of the present invention to provide a smear butt rotation mechanism that effectively solves the problems of the prior art, has a simplified configuration, and has reliable control operations.

[Key points of the invention]

In order to achieve such an object, the present invention provides a predetermined rotation stop position in the middle of a predetermined rotation switching position in order to avoid contact between the smear pad and the projecting portion of the drum. .

[Embodiments of the invention]

Next, an embodiment of the present invention will be described in detail based on the drawings.

Fig. 1 is a schematic diagram of the drum can smearing device according to the present invention, Fig. 2 is an explanatory diagram of the operation of the smear pad attachment part, and Fig. 3 is a schematic diagram of the side smear pad drive part. 2) is a plan view thereof, FIG. 4 is a schematic diagram of the smear pad attachment part, (2) is a side view ffl,
m is the top opening, (Q is the bottom view, Fig. 5 is a schematic diagram of the configuration of the shaft drive unit Oa for climbing and bottom use, (2) is its front view, and (2) is its @ side view. 11 to 5, parts having the same functions as those in FIG. 10 or FIG. 11 are given the same reference numerals. , mainly consists of side, top, and bottom smear butt drive parts 31, 33, and 35, and side, top, and bottom smear butt mounting parts 32, 34, and 35. The body 29 is transported and placed on top of the drum 1 which is placed horizontally and rotated, and smear pad drive units 31°33.35 for bending, top and bottom surfaces are installed, and the frame body 2
A radiation detector 30 is installed at 9A. By the way, the side smear pad drive section 31 consists of a front-rear drive mechanism 37 and a vertical drive mechanism 38, as shown in FIG.

The longitudinal drive mechanism 37 includes a support plate 3 fixed on the frame body 29.
9. The two guide bars 40 and 40 connecting between 39A and the guide bars 40 and 40 allow the
It consists of a movable plate 41 with a f-shaped member 44 fixed on the back side, and a front-rear self-feeding screw 43 that screws into the female threaded portion 42 fixed on the back side of the same movable plate 41. 4
3 is a nine drive motor 41SK installed on the support plate 39)
, the movable plate 41 can be freely driven in the front and rear directions. In addition, the vertical drive mechanism 38 includes an upper plate 41 of the movable plate 41 (FIG. 2).
and 94 guide bars 48 penetrating the lower plate 41B and slidably disposed in the "Cf!" direction, and one vertical self-feeding shaft screwed into a female threaded portion 49 provided on the lower plate 41B. A drive motor 51, a coupling 52, a gear box 52A1 pulley 53, 54, which rotates the screw 50 and the female threaded portion 49 to move the vertical self-feeding screw 50 up and down.
Pulley bell) Consists of 5GG, etc. Note that 46 is a side cover of the movable plate 41.

In addition, the smear butt attachment part 32 for the side is shown in Fig. 4 (2).
As shown in the figure, the lower ends of the two guide bars 48 in the front and rear directions are fixed to the upper surface of the mounting frames 52 and 5.
! A, and a mounting frame holding plate 54 which is installed above the mounting frames 52, 52A and has the lower end portion of the vertical self-feeding screw 50 fixed to its surface. This mounting frame holding plate 54 has four guide bars 48 passing through its four corners, and the fixed bin 53 is spaced at a predetermined distance between the pad mounting frame 52 and the pad mounting frame 52A.
fixed by]. The pad mounting frame s252A is provided with arms 55 and 55 for mounting the pad. This pad attachment is done in the form of a cross, and a plurality of Siya pads 4 (in this example, four in this example) are attached radially to each tip, and the central part rotates +1.
1157, and the rotation of the drive motor 56 is transmitted via the Geneva gear 58. Further, the position detection plate 59 and the photoelectric switch 60 are connected to the Geneva gear 5.
Detect the 40 rotational position of the smear pad positioned by 8.

Next, the smear butt moving parts 33.3 for the top and bottom surfaces
As shown in FIG. 5, a mounting frame 62 installed on the frame body 29 (FIG. 1) and a mounting frame 62 penetrating the upper plate 62A and the lower plate 62B of the mounting frame 62 are vertically arranged so as to be slidable. The four guide bars 64 and the lower plate 62 of the mounting frame 62
It consists of one vertically self-feeding screw 66 which is screwed into a female screw part 65 rotatably provided on B and which passes through the upper plate 62m, and a diameter of 73 fathoms.

The rotation of the fast-forward motor 67 is transmitted to the internally threaded portion 65 via a clutch 68, a gear box 69, pulleys 70, 71, and a pulley belt 72. Further, the rotation of the continuous drive motor 73 is transmitted to the internally threaded portion 65 via a clutch 74, a gear box 75, pulleys 76 and 77, and a pulley belt 78.

Furthermore, as shown in FIG. 4 (6) and Ω, the lower ends of four kite pars 64 and one vertical self-feeding screw 66 are attached to the top and bottom smear pad attachment parts 34 and 36, respectively. Mounting frames 79, 79A are provided to be fixed to the surface. This mounting frame 79.79AK is formed in the shape of a cross, and a plurality of smear pads (4 in the non-example) are mounted radially on each tip. 55 through a Geneva gear 58, a pad position detection plate 59 having the same function as that shown in FIG. 4(2), a photoelectric switch 60, etc. are provided. In addition,
The four smear pads on the top smear pad attachment part 34 are
A cover 80 is attached that connects the side or bottom smear pad attachment parts 32 and 36 from the plug part provided on the top surface of the drum 1, which is different from the smear pad 4.

Next, Fig. 1 shows an explanatory diagram of the principle of one embodiment of the present invention, where the figure shows its front view, the figure shows its side view, and Fig. 7 shows a schematic configuration diagram of the smear butt rotation mechanism shown in Fig. 6. In FIGS. 6 and 87, parts having the same functions as those in FIG. Consists of JIE58, drive motor 56, pad position detection plate 59, optical t-switch 60, etc.The pad is attached to the arm 55 via the spring 82. 8!J is the arm rotation axis. C smear butt mounting part 34.36 through bearing 84
installed on. Further, a Geneva gear 58 is fixed to the arm rotation shaft 83 and connected to the drive motor 56 via the Geneva gear 58.

In the smear pad rotation mechanism 81 configured in this way, when the drive motor 56 is driven to rotate, the Geneva gear 56 divides 360 degrees into eight equal parts, and rotation stops every 90 degrees to enable sequential switching of the smear pads 4 and 4A. A predetermined intermediate rotation stop position, that is, a rotation stop position every 45 positions, is provided in the middle. Accordingly, when the smear butt 4 and the four people smear the drum 1 and reach the 1 protrusion 9 part 5, they rotate it by 45 degrees and the smear butt attachment part 34° 36 moves linearly upward, but the smear butt 4 .4 can move without contacting the pad position detection plate 5. This rotational position is determined by the pad position detection plate 5908 equally divided slit (first
4(2)) and a photoelectric switch 60.

Next, Figure @8 shows a schematic forest diagram of another embodiment of the present invention. In the figure, parts having the same functions as those in Figures N6 and 7 are given the same reference numerals. Sumiyabutsudo 4
, 4A, the smear butt attachment portion 85 is configured to rotate in a horizontal plane perpendicular to the vertical movement. Accordingly, by means of a smear pad rotation mechanism constructed in the same manner as shown in FIG. That is, a rotation stop position is provided every 45 degrees.

Next, FIG. 1 shows a schematic diagram of still another embodiment of the present invention. In the figures, parts having the same functions as in FIGS. 6 to 8 are given the same reference numerals. The smear pad rotation mechanism is composed of a shaft 87 provided on the smear pad mounting portion 86 and a drive section (not shown) that rotates the shaft 87 by 180 degrees clockwise or counterclockwise.

With this configuration, the smear pad 4.4 for smearing the surface of the drum flrlo or after smearing can move linearly in the vertical direction while avoiding the protrusion 5. At this time, Geneva gear 5
8A performs a smear butt switching operation that provides a smear butt 4, 4AK rotation angle of 90 degrees.

〔Effect of the invention〕

As described above, according to the present invention, when the plurality of radial smear pads are sequentially rotated and switched, 1. In order to avoid contact with the projecting part of the drum can, the smear pad is placed in the middle of the rotation switching position of the smear pad. In addition to providing a predetermined rotation stop position, the structure is simplified and the control operation is reliable.

In addition, in the embodiment of the present invention, the smear pad rotating machine 1 for the top and bottom smear pad attachment parts is mainly used. 'IK,
As will be explained later, a similar smear pad rotation mechanism is used in the side smear pad attachment portion to switch the smear pad, and intermediate stops are possible.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of the drum can smearing device according to the invention, Fig. 2 is an explanatory diagram of the operation of the smear pad attachment part, and Fig. 3 is a schematic diagram of the side smear pad drive part.
shows the front view, (5) shows the top view, and the fourth factor shows the schematic configuration of the smear pad. , the fifth factor shows a schematic W11 configuration diagram of the top and bottom smear butt drive parts, the figure (4) is a front view thereof, the figure (2) is a side view thereof,
FIG. 6 shows a principle explanatory diagram of an embodiment of the invention, the figure 6 shows its front view, the figure (8) shows its fIII side view, and
The figure is a schematic configuration diagram of the smear butt rotation mechanism in Figure 6, and Figure 8.
The figure shows a schematic configuration diagram of another embodiment of the invention, and FIG. 9 shows the configuration diagram of aw11 of another embodiment.
(6) is a side view thereof, and FIGS. 1O and 11 are schematic explanatory views of the conventional smear butt moving mechanism. 1: Drum, 4,4A Nismiya pad, 5: Business trip 9
Part, 10 Ni drum can smear iron rack, 34: Smear pad attachment part for top surface, 36: Smear pad attachment part for bottom surface, 55:
The pad is attached to the arm, 56: Drive motor, 58: Geneva float, 59: Position detection plate, 60: Photoelectric switch, 81:
Smear pad rotation mechanism. Patent issuer Fuji Electric Co., Ltd. (A) No. E No. 6 No. 7 No. 8 No. 11

Claims (1)

[Claims] 1) It has a plurality of smear pads arranged radially,
In a drum smearing device in which the smear pad is sequentially rotated and switched when smearing surface contaminants of a radioactive waste solidification drum with which the smear pad comes into contact, contact between the smear pad and the projecting portion of the drum is avoided. . A smear pad rotation mechanism, characterized in that a predetermined rotation stop position is provided between the rotation switching positions of the smear pad.