JPH04242191A - Holder type filter paper head - Google Patents

Abstract

PURPOSE:To shorten time for other than sweeping and enable inspection of plenty of drums by using a holder with a structure to push out filter papers stacked and contained in a metal cylinder in turn from one end. CONSTITUTION:By stacking a plurality of filter papers through pads 2 and containing them in metal cases 1, a filter paper holder 4 is constituted so that the filter paper at the front appearing in the hole on an end plate 4a can be pushed out of the semicircular cut at the front end. Two holders 2 are kept back to back by a grip 7 to face the front filter paper to outside and the filter papers in the holder 4 are pushed to outside by a spring mechanism 6. By this, time for other than sweeping can be shortened and thus a plenty of drums can be inspected.

Description

[Detailed description of the invention]

[Purpose of the invention]

0001

[Industrial Application Field] The present invention is applicable to nuclear facilities,
The present invention relates to a device for sampling and inspecting contaminants that may adhere to the surface of an article by wiping, and particularly to a holder for filter paper used for this sampling.

0002

[Prior Art] Fig. 8 shows an example of the configuration of a conventional filter paper head, and Fig. 9 shows an example of the configuration of a conventional filter paper head.
2 shows an example of the equipment arrangement of a conventional wiping device. In FIG. 8, only one filter paper 3 attached to the filter paper pad 2 held in the metal case 1 is held in the holder 81. The holder 81 is supported by a support 85 via a pressing spring 84.
is attached for axial movement. In this filter paper head, the metal case 1 is fixed by a magnet 82, and when collecting the filter paper, a filter paper pushing rod 83 is pushed out toward the filter paper 3 side, thereby removing the metal case 1 and collecting it.

The equipment arrangement of the wiping device using the filter paper head 91 shown in FIG. 8 is as shown in FIG. Filter paper recovery device 93 for measuring
and an arm 14 for moving the filter paper head 91. Here, the arm 14 moves to the position of the filter paper supply device 92 and attaches the filter paper to the holder 81. next,
The arm 14 moves to the wiping position and performs the wiping operation on the drum 16. After the work is completed, the arm 14 moves to the position of the filter paper collection device 93, and performs filter paper collection work and measurement work.

[0004] When using the above-mentioned apparatus to measure surface contamination by replacing the filter paper for each area to be measured, the filter paper must be attached and recovered each time, which requires a lot of work time other than wiping. Therefore, there is a problem in that it cannot be used when a large number of drums are to be inspected. Additionally, since filter paper replacement was a manual process, there was a risk of exposure to radiation in radiation-controlled areas. As a means of solving this problem, there is a method of using a plurality of arms, but there is a problem that the structure and operation are complicated and the cost is high.

[0005]

[Problems to be Solved by the Invention] In view of the above-mentioned problems, the present invention has realized a filter paper head that can shorten the time for replacing and supplying filter paper, reduce manual labor from filter paper replacement work, and reduce the risk of exposure to radiation. The task is to do so.

[Configuration of the invention]

[0007]

[Means for Solving the Problems] The holder type filter paper head of the present invention includes a filter paper attached to a filter paper pad held on one side of a disc-shaped metal case, a cylindrical end plate at one end, and The side wall is cut out in a semicircular shape to allow the metal case of the filter paper to pass through in the radial direction, and the remaining semicircular end plate is provided with a concentric semicircular hole through which the pad of the filter paper can pass. There is a filter paper holder in which multiple pieces of filter paper are stacked and stored in a cylinder with the paper pads protruding outward, and two filter paper holders each with semicircular end plates facing outward and the cutout portions facing outward. A spring mechanism placed between both filter paper holders applies an outward pressing force to the plurality of filter papers housed in each filter paper holder, and The grip has an outer surface that matches the holding portion of the arm of the wiping inspection device.

[0008]

[Function] In the holder type filter paper head of the present invention,
The filter paper head is moved to the inspection surface with its grip held by the arm of the wiping inspection device. Press the filter paper against the specimen and move the arm to wipe the surface. Next, rotate the filter paper head and wipe another test surface with the other unused filter paper. After wiping, the filter paper head is moved to a collection device to collect the used filter paper and transported to an inspection device. Collection is performed by inserting a pushing rod into the hole on the opposite side of the cutout of the filter paper holder and pushing out the filter paper together with the metal case from the cutout. At this time, the next unused filter paper is pushed up by the spring mechanism from behind the extruded filter paper. After that, move the arm again, wipe,
When collecting filter paper and there is no more filter paper in the filter paper holder. Return the filter paper head to the supply device, receive the filter paper head loaded with filter paper, and repeat the process.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below based on embodiments shown in the drawings.

FIGS. 1(a) and 1(b) show a holder type filter paper head according to an embodiment of the present invention. The filter paper 3 is attached to a filter paper pad 2 held on one side of a disk-shaped metal case 1. This filter paper 3 is stored in filter paper holders 4 and 5 with the filter paper surface facing outside.

The filter paper holders 4 and 5 are cylindrical, and the end plates 4a and 5a at one end and the side wall are cut out in a semicircular shape so that the metal case 1 of the filter paper 3 can pass through in the radial direction. Filter paper pads 2 are placed on the remaining semicircular end plates 4a and 5a.
A concentric semicircular hole through which the filter paper can pass is provided, and a plurality of filter papers (three in this example) are stacked and stored in the cylinder in such a direction that the filter paper pad 2 protrudes outward from the semicircular hole. ing. In addition, on the side wall of the side where the cut-out tip portions of the filter paper holders 4 and 5 remain, the end plate 4a is located at the center of the semicircular arc.
, 5a, a push-out rod insertion hole 1 is provided at a position directly facing the circumferential surface of the metal case 1 with the metal case 1 in contact with the inner surface of the metal case 1.
1 is provided. Further, the other ends of leaf springs 10, each of which has one end fixed to a symmetrical position on the side wall on the side where the tips of the filter paper holders 4 and 5 remain, hold the filter paper so as to hug the outer peripheral surface of the metal case 1. is pressed against the cylindrical side wall opposite the cutout.

These filter paper holders 4 and 5 have end plates 4a and 5, respectively, inside a grip 7 having a cylindrical outer peripheral surface formed in a shape that matches the holding portion of the arm of the wiping inspection device.
A pin 9 is fitted into the filter paper holder 4, 5 so as to protrude from the side wall of the filter paper holder 4, 5, with the pin 5a facing outward and the cutout portion exposed.
and a groove 9a provided on the end surface of the grip 7, and further fixed to the grip 7 by a push screw 8 provided near the end surface of the grip 7. In addition, a spring mechanism 6 is arranged in a fixed position at the longitudinal center inside the grip 7, and a metal case 1 of the filter paper located at the innermost part of the plurality of filter papers 3 stored in each filter paper holder 4, 5 is provided. A pressing force is applied to push each filter paper outward.

The operation when the holder-type filter paper head of one embodiment of the present invention constructed as described above is used in a drum wiping inspection device will be explained. Figures 2(a) and 2(b) show a drum wiping inspection device. The holder type filter paper head 12 is connected to a filter paper head supply turntable 13 that performs indexing operation.
are arranged in The arm 14 is provided with a drive unit that grasps the filter paper head at its tip, rotates it, extends and contracts the entire arm, and moves it up and down. The drum drive wheel 15 is arranged so as to touch the edge of the drum 16, and is connected to a drive section to rotate the drum 16.

A filter paper pushing rod 18 is provided at the same height as the receiving opening of the filter paper recovery chute 17. A filter paper recovery table 19 that performs an indexing operation is provided at the exit of the filter paper recovery chute 17, and the following engagement points are provided among the indexing points. That is, next to the filter paper collection/reception position, the radiation detector 20 is disposed at an upper position coaxial with the center of the filter paper. Furthermore, at the next index point, a sweep bar 21 is provided at the same height as the filter paper, and beside it,
A filter paper collection tray 22 is placed in a portable manner.

The wiping operation by the holder type filter paper head 12 in such a drum wiping inspection device will be explained with reference to FIGS. 3 to 6.

As shown in FIG. 3, the filter paper head 12 is moved from the filter paper head supply turntable 13 to the top plate of the drum 16 with the grip 7 held by the arm 14.
The filter paper A is pressed against the top plate and moved in the radial direction on the top plate of the rotating drum by the movement of the arm 14 to wipe the surface. At this time, by orienting the cut-out portion at the tip of the filter paper head 12 in the wiping direction, it is possible to prevent the filter paper from coming off from the filter paper holder during wiping. Next, after moving the filter paper head 12 sideways from the top plate,
Rotate 80 degrees and place the other unused filter paper B in drum 1.
6 and lower the filter paper head 12 along the side plate of the rotating drum 16 to wipe the side plate. At this time, since the filter paper is held down by the plate spring 10, it will not come off even if it is rotated or the like.

Next, as shown in FIG. 4, the filter paper head 12
is withdrawn from the drum, the filter paper head 12 is rotated 180 degrees so that filter paper A is on top, and the filter paper head 12 is lowered and moved to the filter paper head supply turntable 13.
, and move the filter paper pushing rod 18 forward to push out the filter paper A. That is, as shown in FIGS. 6(a) and 6(b), the filter paper pushing rod 18 advances and enters the filter paper holder 4 through the pushing rod insertion hole 11, pushing the metal case 1 of the filter paper 3 and moving it in the radial direction. , and push it out from the semicircular cutout of the filter paper holder 4. The filter paper A that has been pushed out is placed on the index point of the filter paper collection table 19 via the filter paper collection chute 17 shown in FIGS. 2(a) and 2(b). By rotating the table, the filter paper A becomes the radiation detector 20.
The filter paper collection tray 2 is then moved to the sweep bar 21,
It will be discarded within 2 days. Filter paper B is handled in the same manner and is disposed of in the filter paper collection tray 22 after radiation measurement.

As shown in FIG. 5, in the filter paper holder 12 from which the filter paper B has been pushed out, the next unused filter paper D is pushed up by the spring mechanism 6, and the filter paper protrudes from the hole in the end plate. The filter paper holder 12 is pressed against the bottom plate of the drum 16, and the bottom plate of the rotating drum 16 is wiped. After wiping, the filter paper is disposed of in the filter paper recovery tray 22 after radiation measurement, as in the case of filter papers A and B.

The drum that has been wiped in the above manner is replaced with the next drum to be inspected, and the drum is moved again to the arm 14.
, wipe down the top, side and bottom plates, measure and dispose of the filter paper. When the filter paper is used up, the filter paper head 12 is returned to the filter paper head supply turntable, a new filter paper head loaded with filter paper is received by holding the grip 7 by the holding part of the arm, and the wiping operation is repeated.

In the wiping operation using the holder type filter paper head of one embodiment of the present invention, (1) the filter paper head 12
The filter paper 3 can be replaced by only the rotating operation, and the time required for the replacement work can be significantly reduced. (2) Since the operations involved in replacing the filter paper 3 can be reduced, the operation content and range of movement of the arm 14 can be reduced, and the mechanism can be simplified. This also allows miniaturization of the entire device. (3) Filter paper 3
Since a plurality of filter papers can be loaded and supplied into the filter paper head 12 at once, the frequency of filter paper supply can be reduced and labor savings can be achieved. This also has the effect of reducing the risk of exposure in radiation controlled areas.

Next, a modification of the holder type filter paper head of the present invention is shown in FIG. The filter paper head of this modification has a structure in which the tip of the filter paper holder holding the metal case 1 of the filter paper 3 protruding from the end plates 4a, 5a of the filter paper holders 4, 5 can swing around a pin 71. It is characterized by being configured with a swinging head 72. Thereby, even when the surface to be wiped has irregularities or curved surfaces, the shape can be followed, and the wiping efficiency can be improved.

[0022]

Effects of the Invention As described in detail above, according to the present invention, a plurality of filter papers pasted to a metal case through pads are stacked and stored, and the leading filter paper is exposed through the hole in the end plate, and the leading half of the filter paper is exposed through the hole in the end plate. The filter paper holder is structured so that the filter papers can be pushed out one by one in the radial direction from a circular notch, and the cylindrical grip holds this filter paper holder back to back with the filter paper at the tip facing outward, and both holders are held together. By realizing a holder-type filter paper head that applies an outward pressing force to the filter paper in each holder using a spring mechanism placed between them, it is possible to perform wiping work in a drum wiping inspection device using this holder-type filter paper head. The filter paper can be replaced simply by rotating the filter paper head, reducing the time required for tasks other than wiping, and making it possible to handle a large number of inspection targets. Also,
Since the number of operations involved in replacing the filter paper is reduced, the operation content and range of movement of the arm of the wiping device can be reduced, making it possible to simplify the mechanism and downsize the device. Furthermore, since a plurality of filter papers can be loaded and supplied into the filter paper head in bulk, the frequency of filter paper supply can be reduced, labor can be saved, and the risk of exposure to radiation in radiation controlled areas can be reduced.

[Brief explanation of the drawing]

FIG. 1 shows a holder-type filter paper head according to an embodiment of the present invention,
FIG. 1(a) is a side view partially shown in cross section, and FIG. 1(b) is a bottom view.

FIG. 2 shows a drum wiping inspection device using the holder type filter paper head of the present invention, FIG. 2(a) is an elevational view, and FIG.
b) is a top view.

FIG. 3 is an explanatory diagram of the operation of the drum wiping inspection device of FIG. 2;

FIG. 4 is an explanatory diagram of the operation of the drum wiping inspection device of FIG. 2;

FIG. 5 is an explanatory diagram of the operation of the drum wiping inspection device of FIG. 2;

6 is an explanatory diagram illustrating a filter paper extrusion operation in the filter paper holder of the holder-type filter paper head of FIG. 1, in which FIG. 6(a) is a sectional view of the main part, and FIG. This is a perspective view.

FIG. 7 is a side view showing a holder type filter paper head according to a modification of the present invention.

FIG. 8 is a sectional view showing the configuration of a conventional filter paper head.

FIG. 9 is a plan view showing the equipment arrangement of a conventional wiping device.

[Explanation of symbols]

1 Metal case 2 Filter paper pad 3 Filter paper 4 Filter paper holder 4a End plate 5 Filter paper holder 5a End plate 6 Spring mechanism 7 Grip 8 Push screw 9 pin 10 Leaf spring 11 Push rod insertion port 12 Holder type filter paper head

Claims (2)

[Claims] Claim 1: A filter paper affixed to a filter paper pad held on one side of a disk-shaped metal case, and a cylindrical end plate and side wall at one end through which the metal case of the filter paper can pass in the radial direction. A concentric semicircular hole through which the filter paper pad can pass is provided in the remaining semicircular end plate, and a plurality of concentric semicircular holes are formed in such a direction that the filter paper pad protrudes outward from the semicircular hole. A paper holder that stores filter papers stacked in a cylinder, and a paper holder that holds two of these filter paper holders inside the cylinder with the end plates facing outward and the cutout portions exposed outside, and between the two filter paper holders. A spring mechanism arranged in the filter paper holder applies an outward pressing force to the plurality of filter papers housed in each filter paper holder, and the grip has a cylindrical outer surface shaped to match the holding part of the arm of the wiping inspection device. Holder type filter paper head. 2. The filter paper holder is characterized in that the distal end portion of the filter paper holder that holds the metal case of the filter paper protruding from the end plate of the filter paper holder is structured as a swinging head capable of swinging around a pin. A holder-type filter paper head according to claim 1.