JP2009236859A - Cutting device for inner ring used in glove box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting device for an inner ring used in a glove box for cutting an annular inner ring into an appropriate shape to reduce a volume for storage to solve the problem that a storage space in storage equipment is limited in the case of disposing dangerous objects such as radioactive contaminants. <P>SOLUTION: An electric cutter 21 having a fixed blade 23 and a movable blade 22 capable of being opened and closed is housed in a circular tube shaped casing 30, and edge accommodating notches 31, 32 aligned on the same linear line are formed within a range where the movable blade 22 and the fixed blade 23 can move. An inner ring accommodating notch 33 for accommodating the inner ring 11 is formed in a direction crossing the edge accommodating notches 31, 32. When the inner ring 11 is held in the inner ring accommodating notch 33 and the movable blade 22 and the fixed blade 23 are closed, a shear force is applied to the inner ring 11 to cut the inner ring. The casing 30 has a shape capable of being inserted through a glove port 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a glove box inner ring cutting device for reducing the volume of an inner ring and other parts used in a glove box used when handling radioactive materials in a nuclear facility, for example, particularly for each glove box. The present invention relates to a cutting device for an inner ring for a glove box having a structure suitable for installation.

  Hazardous substances that adversely affect the human body, such as radioactive substances and toxic gases, must be handled in a closed space so that workers do not touch these hazardous substance environments. A glove box is a device that closes this kind of dangerous substance and allows it to be handled from the outside. FIG. 6 shows a schematic structure of a glove box 1 used in a nuclear facility that handles radioactive substances. Various handling devices 2 for radioactive substances are arranged inside the glove box 1, and a glove port 3 for an operator P to operate the handling device 2 is provided on the front wall. The front wall is made of a material that allows the inside to be visually confirmed. In addition, the side wall of the glove box 1 is large for supplying necessary tools and devices inside the glove box 1 into the glove box 1 and taking out unnecessary parts and devices in the glove box 1. Port 4 is provided. In addition, ventilation in the glove box 1 is performed by the air supply facility 5 and the exhaust facility 6, and the exhaust is purified and the radioactive material is surely removed. The inside of the glove box 1 is maintained at a negative pressure so that the internal environmental air does not leak to the outside. Also, an alarm panel 7 is provided so that an alarm is issued when an abnormality occurs.

  FIG. 5 is a sectional view showing the structure of the glow port 3. The glove port 3 is a resin cylinder fixed to the front wall of the glove box 1, and an inner ring 11 is inserted into the inner peripheral surface thereof. A double ring groove 11a is provided on the outer surface of the inner ring 11 on the front side from the center to the glove box 1 side, and a cuff mounting portion 11b is formed behind the ring groove 11a. ing. These ring grooves 11a are covered with rubber gloves 12, and the cuffs 12a of the gloves 12 are brought into contact with the cuff mounting portions 11b and are fixed by O-rings 13 that engage with the ring grooves 11a. . Further, an appropriate number of packing grooves 11c are formed at the rear of the cuff mounting portion 11b. A packing 14 is accommodated in the packing groove 11c and is in close contact with the inner peripheral surface of the globe port 3, so that the The space between the ring 11 is sealed. A locking groove 11d is formed on the inner side surface of the inner ring 11 at the rear end. On the other hand, a locking groove 10 a is formed at the rear end of the outer surface of the globe port 3. A fixed ring 15 having engaging portions 15a and 15b that are engaged with the engaging groove 11d and the engaging groove 10a is provided. That is, the stationary ring 15 is annular, and a cross section cut by a plane including the annular axis is substantially U-shaped, and one leg portion of the U-shape is elongated, and the distal ends of these leg portions The engaging portions 15a and 15b are formed on the top. Therefore, when the fixed ring 15 is engaged with the globe port 3 and the inner ring 11 by the engaging portions 15a and 15b, the inner ring 11 is connected to the globe port 3 and the inner ring 11 is detached from the globe port 3. It will be in a state that does not.

  Further, in order to replace the inner ring 11, a pushing jig 16 is inserted from the outside of the fixed ring 15. The pushing jig 16 has a cylindrical shape with a bottom 16a, and a flange portion 16c is provided on a part of the outer side of the body portion 16b. When the pushing jig 16 is attached to the globe port 3, the flange portion 16c is provided. Is in contact with the outer surface of the fixed ring 15. A ring groove 16d is formed on the outer side surface of the front end portion of the body portion 16b, and an O-ring 17 is fitted. The push jig 16 is fixed to the push jig 16 in a state where the push jig 16 is inserted into the fixed ring 15. It is fixed so that no slip occurs with the ring 15. To use the glove port 3, as shown in FIG. 6, when the operator P inserts his arm from the glove port 3, the glove 12 is put on the hand and arm and faces the glove port 3. The radioactive material handling device 2 can be operated.

  The globe 12 is made of rubber and may deteriorate due to aging. Therefore, the globe 12 needs to be replaced in a timely manner. To replace this glove 12, the fixed ring 15 is removed, the new inner ring 11 fitted with a new glove 12 is in contact with the rear end of the existing inner ring 12, and the fixed ring 15 is attached. In this state, the pushing jig 16 is pushed into the glove port 3 to drop the existing globe 12 into the glove box 1 together with the existing inner ring 11.

  By the way, there are severe conditions for the disposal of radioactive pollutants, and they cannot be disposed carelessly. Those that can be incinerated will be discarded by incineration, but those that cannot be incinerated may be buried deep underground, for example. Since the inner ring 11 and the globe 12 are not disposed of in a disposal method, they are stored in a storage warehouse, etc., separated from the atmosphere together with radioactive pollutants for which no other treatment method has been established. ing. Since there is a limit to the space of this storage warehouse, it is necessary to reduce the amount of radioactive pollutants generated in the future, and it is desirable to reduce the amount of radioactive pollutants that are currently awaiting disposal. ing. The old inner ring 11 and the globe 12 after replacement described above are separated and stored as waiting for disposal. As described above, the packing 14 that secures airtightness with the glove port 3 is disposed on the outer peripheral surface of the inner ring 11, and the glove 12 is attached to the front of the portion where the packing 14 is disposed. The inner ring 11 has a considerable length because the arrangement portion and the attachment portion of the globe 12 are arranged side by side in the axial direction. For this reason, when storing the inner ring 11 in the axial direction, a hollow portion is formed on the inner side, and this portion becomes a useless space, and a storage space such as a storage warehouse is wasted. This makes it difficult to secure storage space for radioactive waste.

  In view of securing the storage space, the applicant of the present application has proposed a glove box inner ring cutting device that can cut and store the inner ring 11 into an appropriate shape (Patent Document 1). The cutting device includes a fixed blade that is connected to the ring holding means in a state where the inner ring is held by the ring holding means, and moves forward and backward with respect to the fixed blade. Cutting is performed by applying a shearing force with the overlapping movable blade.

Japanese Patent Application No. 2005-312528

  The glove box inner ring cutting device disclosed in Patent Document 1 has a structure in which the ring holding means, the fixed blade, the movable blade, and the like are arranged on a frame, and thus the following problems may occur. There is. Until the inner ring to be discarded is stored in a predetermined storage location, the inner ring is temporarily stored temporarily in an appropriate glove box until the number to be stored is collected to some extent. For this reason, this glove box inner ring cutting device is installed in the glove box. Since the waste inner ring is generated from each glove box, in order to cut the inner ring, it is carried from each glove box to the temporary storage glove box and supplied to the cutting device. That is, it is necessary to transfer the waste inner ring to the glove box in which the cutting device is installed. At the time of transfer, the waste inner ring is contaminated with radioactivity, so it must be sealed in a plastic bag. The operation of sealing the plastic bag is complicated and requires a long time. Moreover, since it is taken out from the glove box at the time of transfer, there is a possibility that the worker P may be exposed in the event of an unexpected situation such as damage to the plastic bag. Therefore, the transfer work must be performed carefully. . For this reason, it is not necessary to transfer to a glove box for temporary storage, and it is desired to cut the waste inner ring in each glove box so that it can be temporarily stored in the glove box. .

  However, since the inner ring cutting device for glove box disclosed in Patent Document 1 has a structure in which the ring holding means and the like are incorporated in the frame as described above, it becomes a large-sized one. It cannot be installed in a glove box with no installation space, and it is difficult to install the glove box individually.

  Therefore, an object of the present invention is to provide a small glove box inner ring cutting device that can be individually installed in a glove box.

  As a technical means for achieving the above object, a glove box inner ring cutting device according to the present invention is installed in a glove box and cuts the inner ring in the glove box into an appropriate shape. In the inner ring cutting apparatus for an automobile, the apparatus includes an electric cutting tool having a pair of openable and closable blades, and a housing that houses the electric cutting tool. A blade housing notch for allowing movement; and an inner ring housing notch for housing the inner ring and holding the inner ring cutting portion so as to intersect the blade housing notch. The inner ring held by the part is cut by applying a shearing force by the operation of the blade.

  When the inner ring to be cut is held in the inner ring housing notch and the pair of blades are driven, the inner ring is cut by receiving a shearing force from the pair of blades.

  A glove box inner ring cutting device according to a second aspect of the invention is characterized in that the casing is formed in a substantially cylindrical shape having an outer diameter that can be inserted into the glove box from the glove port.

  The housing can be inserted into the glove port of the glove box and installed in the glove box.

  Further, the glove box inner ring cutting device according to the invention of claim 3 is characterized in that one of the pair of blades is a fixed blade and the other is a movable blade.

  The pair of blades is of a so-called scissor type in which the center portions of the pair of blades are connected to each other by a support shaft so that the blades can be rotated to each other, and the blade is formed on each side of the support shaft. Although there may be, in order to cut | disconnect an inner ring smoothly, it is preferable to provide a booster mechanism and to generate | occur | produce a big shearing force. For this reason, the inner ring can be cut smoothly by fixing one blade and making the other blade movable.

  A glove box inner ring cutting device according to a fourth aspect of the present invention is characterized in that a leg member is detachably attached to the casing, and the leg member is mounted and installed in the glove box.

  For example, in the case of a shape that can be inserted from the globe port, the casing is preferably cylindrical, and the cylindrical shape is difficult to install. For this reason, a detachable leg member is provided, and the leg member is mounted and installed after being inserted into the glove box.

  According to the glove box inner ring cutting device according to the present invention, since the electric cutting tool is housed in the housing, the size is smaller than the cutting device having the frame structure, and each glove box has Can be installed separately. For this reason, since the waste inner ring may be temporarily stored after being cut by the glove box, the waste inner ring to be temporarily stored is dispersed in each glove box. For this reason, it is not necessary to secure a space for temporary storage separately. Moreover, it is not transported to the glove box for temporary storage, and the chance of contaminating the work area with dangerous substances can be reduced.

  In addition, according to the glove box inner ring cutting device according to the invention of claim 2, since it can be inserted into the glove box via the glove port, the glove box can be operated in the manner of changing the glove, for example, using a large port A cutting device can be easily installed in each of the glove boxes.

  In addition, according to the glove box inner ring cutting device according to the third aspect of the invention, the inner ring can be stably cut because the waste inner ring can be cut while being held by the fixed blade.

  Moreover, according to the cutting device of the inner ring for glove boxes which concerns on invention of this invention, this cutting device can be installed in the glove box in the stable state easily, and cutting work is performed in the stable state Can do. In addition, it is preferable that the said leg member is made into the shape which can be inserted in a glove box from a glove port.

  The glove box inner ring cutting device according to the present invention will be specifically described below based on the illustrated preferred embodiments.

  FIG. 1 is a schematic perspective view of a glove box inner ring cutting device 20 in which an electric cutting tool 21 is housed in a cylindrical housing 30. 2 and 3 are a plan view and a front view, respectively, with a part cut away, and FIG. 4 is a left side view with a part omitted. The electric cutting tool 21 housed in the housing 30 is provided with a pair of cutting blades 22 and 23 at one end, and a casing 21a in which a driving motor (not shown) is housed at the other end. It is equipped. The housing 30 covers the electric cutting tool 21 from the tips of the cutting blades 22 and 23 to the end of the casing 21a.

  The lower one of the pair of cutting blades 22 and 23 is a fixed blade 23, and the upper one is a movable cutting blade 22. The movable blade 22 is rotated about a support shaft 24 that supports the cutting blades 22 and 23, and the movable blade 22 is opened and closed with respect to the fixed blade 23 by this rotation. As shown in FIG. 3, these cutting blades 22 and 23 are curved so that their tip portions face each other. Further, a blade portion 22a is provided inside the movable blade 22 so as to be detachable from the main portion 22b of the movable blade 22. When the movable blade 22 is closed with respect to the fixed blade 23, the blade portion 22a and the fixed blade are provided. With 23, the workpiece can be cut by applying a shearing force.

  A link mechanism 25 in which a booster is incorporated is connected to the movable blade 22 and the fixed blade 23. By the operation of the link mechanism 25, the movable blade 22 rotates about the support shaft 24, and the The movable blade 22 opens and closes with respect to the fixed blade 23. The link mechanism 25 is transmitted with the power of the drive motor to the casing 21a (not shown), and the link mechanism 25 is operated by receiving this power, whereby the movable blade 22 is opened and closed with respect to the fixed blade 23.

  In order to allow the movable blade 22 to move relative to the fixed blade 23, the end of the housing 30 on the side where the cutting blades 22, 23 are located (the end on this side is referred to as a tip end). ), A blade portion accommodating notch 31 is formed in the moving range of the movable blade 22. Further, a blade portion accommodating notch 32 is formed at a portion where the fixed blade 23 is located. As shown in FIG. 4, these blade portion accommodating notches 31 and 32 are formed so as to be arranged on substantially the same straight line. An inner ring accommodating notch 33 is formed in a shape along the arc of the inner ring 11 in a direction intersecting with the blade accommodating notches 31, 32.

  A power cable 36 extended from the drive motor and a switch cable 38 connected to the hand switch 37 are drawn out from the rear end side end of the housing 30 to the outside.

  The outer diameter of the cylindrical shape of the casing 30 is such that the casing 30 can be inserted through the glove port 3 of the glove box 1 described above. Further, as shown in FIG. 1, a leg member 40 is detachably attached to the casing 30.

  The cutting device 20 configured as described above is installed and used in the glove box 1. When installed in the glove box 1, it can be inserted from the glove port 3 depending on the shape and size of the housing 30. In addition, the insertion operation into the glove box 1 can be performed using a plastic bag. That is, a plastic bag can be used instead of the globe 12 in the operation of replacing the globe 12. After being accommodated in the glove box 1, the leg member 40 is attached to the housing 30, and the cutting device 20 is installed at a desired position in the glove box 1. The leg member 40 is also inserted from the glove port 3 and accommodated in the glove box 1 and attached to the casing 30, and the casing 30 is installed on the floor surface of the glove box 1. Extend the power cable 36 of the cutting device 20 to the outlet in the glove box 1 and insert the plug.

  When the waste inner ring 11 is cut, if the hand switch 37 is operated with the inner ring housing notch 33 positioned, the drive motor (not shown) is activated. As a result, the movable blade 22 moves in the direction of closing the cutting blades 22, 23 with respect to the fixed blade 23 via the link mechanism 25, and is held in the inner ring housing notch 33 during the movement. The inner ring 11 is cut by receiving a shearing force from the blade 22a and the fixed blade 23.

  If the waste inner ring 11 is cut into a desired shape and size, it is temporarily stored in the surplus space in the glove box 1. Thereafter, with an appropriate amount of the waste inner ring 11 accumulated, it is transferred to a predetermined storage location.

  Since the cutting operation of the disposal inner ring 11 is performed in the glove box 1, the worker P performs the work from the outside of the glove box 1 with the glove 12 attached. Since the globe 12 is made of rubber in consideration of workability, it may be damaged if it comes into contact with an acute angle part such as a tool or apparatus. In particular, since the cutting blades 22 and 23 of the cutting device 20 are sharp, it is necessary to avoid contact with the globe 12 as much as possible. In this regard, in this cutting device 20, since both the movable blade 22 and the fixed blade 23 are accommodated in the casing 30, and the inner ring 11 can be cut while being held in the inner ring accommodating notch 33, these cuttings are possible. There is no case where the blades 22, 23 come into contact with the globe 12, and the globe 12 is not inadvertently damaged. Therefore, the worker P can concentrate on the holding of the discard inner ring 11 and perform the cutting work without paying attention to the damage of the globe 12. For this reason, the cutting operation can be facilitated.

  According to the glove box inner ring cutting device according to the present invention, each glove box can be installed separately, and can be inserted from the glove port, and can be easily installed. Contributes to ensuring a higher level of safety in facilities that handle hazardous substances.

It is a perspective view which shows schematic structure of the cutting device of the inner ring for glove boxes which concerns on this invention. It is a top view which cut | disconnects and shows a part of cutting device of the inner ring for glove boxes shown in FIG. It is a front view which cut | disconnects and shows a part of cutting device of the inner ring for glove boxes shown in FIG. It is a left view which abbreviate | omits and shows a part of cutting device of the inner ring for glove boxes shown in FIG. It is sectional drawing explaining the structure of a glove port. It is a perspective view explaining the schematic structure of a glove box.

Explanation of symbols

P Driver 1 Glove box 3 Glove port 4 Large port
10 Outer ring
11 Inner ring
12 Globe
20 Cutting device
21 Electric cutting tool
21a casing
22 Movable blade
22a Blade
22b Main part
23 Fixed blade
24 Support shaft
25 Link mechanism
30 housing
31 Blade receiving notch (for movable blade)
32 Blade part accommodation notch (for fixed blade)
33 Inner ring accommodation notch
36 Power cable
37 Hand switch
38 Switch cable
40 leg members

Claims (4)

In a glove box inner ring cutting device that is installed in a glove box and cuts the inner ring in the glove box into an appropriate shape,
An electric cutting tool having a pair of openable and closable blades;
A housing for housing the electric cutting tool;
A blade housing notch that allows the pair of blades to move and a inner ring that houses the inner ring and a cutting portion of the inner ring that intersects and holds the blade housing notch in a part of the housing. An apparatus for cutting an inner ring for a glove box, comprising: a ring housing notch portion; and cutting an inner ring held by the inner ring housing notch portion by applying a shearing force by the operation of the blade.   2. The cutting device for an inner ring for a glove box according to claim 1, wherein the casing is formed in a substantially cylindrical shape having an outer diameter that can be inserted into the glove box from the glove port.   3. The glove box inner ring cutting device according to claim 1, wherein one of the pair of blades is a fixed blade and the other is a movable blade.   The inner ring for a glove box according to any one of claims 1 to 3, wherein a leg member is detachably provided on the housing, and the leg member is mounted and installed in the glove box. Cutting device.

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