JP2007240398A - Port structure for glove box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a port structure with a pressed-in old inner ring to be pulled out by a worker without letting it fall when changing gloves used in a glove box, because apparatuses, devices, etc. existing in a fall area are in risk of being damaged since the old inner ring is let fall into the glove box by pressing it thereinto by means of a new inner ring, as to a structure in which gloves are changed together with inner rings holding the gloves. <P>SOLUTION: By making the axial length of a fit face 21 of a glove port 20 larger than the length of each inner ring 11, an old inner ring 11o is held by a terminal fit end part 22 with the new inner ring 11n positioned at a prescribed position when pressing the old inner ring 11o (shown in Fig.5) thereinto by means of the new inner ring 11o (shown in Fig.5). A temporary locking means 23 is provided on the end part 22, making it possible for the worker to pull out the old inner ring 11o into the glove box 1 by using a vicinal glove box 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  This invention is a glove that prevents the old inner ring from falling into the glove box even when the old inner ring is pushed with the new inner ring when replacing the old inner ring attached to the port of the glove box. It relates to the port structure of the box.

  For example, dangerous substances that adversely affect the human body, such as radioactive substances and toxic gases, need to be handled in a closed space so that workers do not touch these dangerous 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. 7 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 driver P attaches work gloves for operating the handling device 2 to the front wall. A glove port 3 is provided. 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. To use the glove port 3, as shown in FIG. 7, when the driver 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.

  FIG. 6 is a cross-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 along 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. A rubber glove 12 is put on the ring grooves 11a, and the cuff 12a of the glove 12 is brought into contact with the cuff attaching portion 11b. The globe 12 is fixed with an O-ring 13 so as to engage with the ring groove 11a. Further, an appropriate number of packing grooves 11c are formed at the rear of the cuff mounting portion 11b, and packings 14 such as T-rings are accommodated in the packing grooves 11c and are brought into close contact with the inner peripheral surface of the globe port 3 so that the gloves The space between the port 3 and the inner 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 becomes a state that does not.

  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. As a method for replacing the glove 12, for example, there is a glove for a glove box disclosed in Patent Document 1. This glove for a glove box is a cylindrical inner ring main body that can be inserted into a glove port of the glove box, and the other inner ring main body is inserted into the glove port to which the inner ring main body is attached. The inner ring body having a shape capable of coming into contact with the rear end portion of the inner ring main body to which the front end portion of the other inner ring main body is already mounted is disposed inside the inner ring main body. A cylindrical glove fixing part and a glove whose base end part is tightly fixed to the glove fixing part, and the glove fixing part is disposed at a position separated from the inner ring body. is there.

  FIG. 5 illustrates a procedure for exchanging the globe 12 together with the inner ring 11. Note that, as necessary, each of the existing inner ring 11 and the globe 12 is attached with a suffix o, and each of the new inner ring 11 and the globe 12 to be replaced is attached with a suffix n. FIG. 5 (a) shows that the old glove 12 o to be replaced is in a state where the old inner ring 11 o is attached to the glove port 3 together with the old glove 12 o, and the old inner ring 11 o is between the glove port 3 and Airtightness is maintained and they are fitted. When replacing the old globe 12o, the fixed ring 15 is removed as shown in FIG. 5 (b), and the new inner ring 11n fitted with the new globe 12n is replaced with the old one as shown in FIG. 5 (c). It is brought into contact with the rear end portion of the inner ring 11o. In this state, the pushing jig 16 is installed at the rear end of the new inner ring 11n, and the new inner ring 11n is pushed in. The pushing jig 16 is connected to the glove port 3 by engaging an engaging claw portion 16a provided integrally with the jig main body 16b with the base portion of the glove port 3, and the jig main body 16b includes the new claw portion 16a. A support portion 16c that covers the inner ring 11n is provided, and a push screw 17 is screwed into the support portion 16c. A pushing jig 16 is attached to the tip of the pushing screw 17 so as to be rotatable with respect to the pushing screw 17. When the head 17a of the push screw 17 is gripped and rotated, the push screw 17 pushes the support portion 16c and the new inner ring 11n to push the old inner ring 11o together with the old globe 12o from the globe port 3. . When the new inner ring 11n reaches a predetermined position of the glove port 3, the old glove 12o and the old inner ring 11o fall into the glove box 1. Then, when the pushing jig 16 is removed and the fixed ring 15 is attached, as shown in FIG. 5 (d), the new glove 12n is attached to the glove port 3 together with the new inner ring 11n. Thereafter, the new glove 12n is used. become able to.

Japanese Patent No. 2995627

  However, if the glove 12 is replaced by the above-described method, the old inner ring 11o held by the old glove 12o falls into the glove box 1. As described above, various devices, instruments, and device devices such as the handling device 2 are efficiently arranged in the glove box 1 in a limited space. For this reason, if these devices are in the fall zone of the old inner ring 11o, the old inner ring 11 and the old globe 12 may collide with these devices. There is a risk of damage to equipment due to the impact of time.

  To provide a glove box port structure that prevents the old inner ring from being accidentally dropped when replacing the glove by pushing the new inner ring and pushing out the old inner ring with a pushing jig. It is an object.

  As a technical means for achieving the above object, the port structure of the glove box according to the present invention forms a closed space having an atmosphere harmful to the human body, and works in the closed space to form the closed space. It is a port structure of a glove box to which an inner ring that holds the glove etc. in a glove box that can be carried out from the outside through a glove or a plastic bag provided on a wall body, At the time of replacement, in the glove box port structure in which the new inner ring is pushed in together with the new glove and the old glove is pushed out together with the old inner ring, the fitting length of the port with the inner ring is made larger than the inner ring. The rear end of the inner ring pushed out from the port The final fitting end of the port on the glove box side is provided with temporary locking means for stopping the inner ring at the position and allowing the inner ring to be removed from the inner side of the glove box. Yes.

  When replacing the glove, etc., if the old inner ring is pushed by the new inner ring, the old inner ring moves forward toward the inside of the glove box. Here, since the fitting length with the inner ring of the port is larger than the length of the inner ring, even if the new inner ring is pushed to a predetermined position in the port, the old inner ring Not pushed out of the port. In this position, the old inner ring is in a state where its rear end is temporarily locked by the temporary locking means and is accommodated in the port. In this state, the operator removes the temporarily locked old inner ring from the nearby glove port. Since the old inner ring is locked by the temporary locking means, the operator can easily remove it.

  The port structure of the glove box according to the invention of claim 2 is characterized in that the temporary locking means has a reduced contact area with the inner ring at the final fitting end.

  By reducing the contact area, the force with which the port holds the old inner ring is reduced. For this reason, it is possible to easily adjust the size so that the operator can easily remove the old inner ring and has a holding force that prevents the old inner ring from being accidentally dropped.

  As a structure for reducing the contact area, for example, an appropriate number of protrusions having a curved surface such as a spherical surface are formed on the inner surface of the port, and the final fitting end is formed by the surface of the protrusion. . Therefore, when the old inner ring moves forward to the foremost part, the rear end portion of the old inner ring is stopped in the port in a state where it is fitted to the surface of the protrusion. By adjusting the number of the protrusions, the force for holding the old inner ring can be adjusted, so that the operator can easily remove it.

  Further, the glove box port structure according to the invention of claim 3 is such that the contact area is reduced by forming a recess in a part of the inner peripheral surface of the port at the final fitting end, and the portion other than the recess Is the temporary locking means.

  That is, since the concave portion formed on the inner peripheral surface of the port does not contact the inner ring, the concave portion does not have a contact area, and the inner ring is engaged with a portion other than the concave portion to hold the inner ring. The power to do is reduced. The contact area is adjusted by adjusting the number of recessed parts and the length in the circumferential direction, so the force with which the port holds the inner ring can be adjusted, and the inner ring does not fall off accidentally, making it easy for the operator The size can be adjusted so that the inner ring can be removed.

  According to the port structure of the glove box according to the present invention, the old inner ring can be pushed out of the port even when the old inner ring is pushed by the new inner ring and the new inner ring is positioned at a predetermined position. Absent. For this reason, the old inner ring does not fall into the glove box and does not collide with the device. Moreover, the old inner ring held by the port can be easily removed by the operator using the nearby glove port.

  Further, according to the port structure of the glove box according to the invention of claim 2, the magnitude of the holding force of the port with respect to the inner ring can be easily adjusted by reducing the contact area between the port and the inner ring. Since the inner ring is formed of a synthetic resin such as polycarbonate, the contact area can be easily increased or decreased during the molding.

  According to the port structure of the glove box according to the invention of claim 3, the portion where the recess is formed does not constitute a contact area with the inner ring. It is sufficient that the depth of the concave portion is a dimension that is equal to or larger than the tolerance that the inner ring and the packing are allowed to have a clearance. Therefore, the recess can be easily processed, and as described above, the inner ring can be easily formed as compared with the structure in which the protrusion is formed.

  Hereinafter, based on the illustrated preferred embodiment, the port structure of the glove box according to the present invention will be specifically described.

  1 and 2 show a glove port having a structure according to the present invention. FIG. 1 is a cross-sectional view of a glove port 20 to which an inner ring holding a glove is attached, cut along a plane including an axis. FIG. FIG. 3 is a front view of the glove port 20 viewed from the outside of the glove box 1. The inner circumferential surface of the globe port 20 is a fitting surface 21 that fits with the inner ring 11, and as described above, the packing 14 is in close contact with the fitting surface 21, and the glove port 20 and the inner ring 11 are in contact with each other. Airtightness is ensured. The axial length of the fitting surface 21 of the globe port 20 is made slightly larger than the length of the portion related to the fitting of the inner ring 11, and the old inner ring 11o is pushed by the new inner ring 11n as described above. When moved, the old inner ring 11o cannot be pushed any more in the state where the new inner ring 11n is fitted at a predetermined position of the globe port 20. And, in a state where the old inner ring 11o is located at a position where it is not pushed any further, a part of the glove port 20 on the inner side of the glove box 1 that is opposed to the rear end of the fitting portion of the old inner ring 11o Is the final fitting end 22.

  As shown in FIG. 3, the final fitting end portion 22 is formed with a concave portion 23a that is appropriately cut in the axial direction from the glove box 1 side. Temporary locking means 23 is formed which fits the rear end portion and temporarily locks the inner ring 11. The number of the temporary locking means 23 is appropriately arranged on the final fitting end portion 22 of the fitting surface 21 at positions that are substantially equidistant in the inner circumferential direction. Further, the recess 23a is formed with a depth that does not reach the bottom surface even when the packing 14 that has been crushed by fitting the inner ring 11 with the globe port 20 is crushed and released. It only has to be.

  The effect | action of the port structure of the glove box based on this embodiment comprised by the above is demonstrated below.

  As described above, when replacing the glove 12, the new inner ring 11n holding the new glove 12n is pressed from behind the old inner ring 11o holding the existing old glove 12o, and the push-in treatment is performed. Push in with tool 16. As a result, the new inner ring 11n moves forward and pushes the old inner ring 11o. When the new inner ring 11n is pushed into the predetermined position of the glove port 20, the old inner ring 11o cannot be pushed any further and the old inner ring 11o is stopped at the glove port 20. It becomes.

  In the state where the old inner ring 11o is stopped, the rear end portion that fits with the globe port 20 of the old inner ring 11o is located at the final fitting end portion 22. Therefore, the operator pulls out the pushed old inner ring 11o from the glove port 20 by using another glove port 20 in the vicinity of the glove port 20 where the old inner ring 11o is held. Since the temporary engagement means 23 is provided at the final fitting end portion 22, the force with which the old inner ring 11o and the glove port 20 are fitted, that is, the glove port 20 holds the old inner ring 11o. Since the force to perform is smaller than the holding force on the fitting surface 21, the old inner ring 11o can be easily removed together with the old globe 12o.

  For the glove port 20 having an inner diameter of the fitting surface 21 of 195 mm, the recess 23a is formed to form the temporary locking means 23 at a portion other than the recess 23a, and the depth of the recess 23a is 1 mm, that is, the shaft The direction length is set to 7.1 mm, the frontage, that is, the circumferential length is changed to change the circumferential length L of the temporary locking means 23 (see FIG. 3B) and the number of temporary locking means 23 By changing n, the contact surface length (L × n (mm)) with the inner ring 11 at the final fitting end 22 was varied, and the force for removing the inner ring 11 at that time was measured. The result is shown in FIG. Since there is a processing error in the inner diameter of the fitting surface 21 of the glove port 20, measurement was performed for different glove ports 20. Further, in this measurement, the temporary locking means 23 is provided at four positions at substantially equal intervals in the circumferential direction of the fitting surface 21, and the circumferential length of the concave portion 23a is sequentially increased so that the final fitting end portion 22 This was done by changing the length of the contact surface with the inner ring 11 (fitting length: L × n). When the contact surface length (L × n) is 613 mm, the temporary locking means 23 is not provided, and in this case, a force of 17.70 to 18.14 kgf is required to remove the inner ring 11. . This is because the inner ring 11 can be moved relative to the glove port 20 by using the pushing jig 16, and cannot be moved unless a jig or the like is used. In order that an operator can remove the inner ring 11 without using a jig or the like, it is desirable that the removal force is 3 kgf or less. Further, if the removal force is too small, the inner ring 11 may fall off the globe port 20 due to its own weight. For this reason, for example, in FIGS. 4A and 4B, when the contact surface length (L × n) is 140 mm, the detaching forces are 2.78 kgf and 2.60 kgf, and the inner ring 11 is connected to the glove port 20 In this case, the operator can easily remove it, and a good result was obtained. That is, it is preferable that the opening of the recess 23a is about 118 mm, and the circumferential length L of each of the four temporary locking means 23 is about 35 mm. Even when the variation value in FIG. 4 is taken into consideration, the maximum value is 3.3 kgf, and there is no problem in removing the inner ring 11. Therefore, in the glove port 20 having the inner diameter of the fitting surface 21 of 195 mm, it is preferable that the opening of each of the four recesses 23a is 115 to 120 mm and is formed at four locations at approximately equal intervals in the circumferential direction.

  In the embodiment described above, the glove port 20 is provided with the structure according to the present invention, but other ports provided in the glove box 1, such as a small port, a middle port, a large port, etc. The structure of the present invention can be used as long as the port adopts a structure in which an inner ring holding a plastic bag or the like is mounted.

  According to the port structure of the glove box according to the present invention, the inner ring is not dropped when the glove or the like is exchanged, so that the device apparatus or the like in the glove box is not damaged. Therefore, the cause of stopping the operation of the nuclear facility using the glove box can be removed, and the operation efficiency is not reduced.

It is center part sectional drawing of the glove port provided with the structure concerning this invention. It is a front view of the glove port shown in FIG. It is an enlarged view which shows the final fitting end part of the globe port shown in FIG. 1, (a) is the sectional view on the AA line in (b), (b) is a BB arrow line view in (a). It is a table | surface which shows the result of having measured the contact surface length and the removal force about the Example of the glove structure which concerns on this invention, and is carrying out about two glove ports of (a) and (b). It is a figure explaining the procedure at the time of replacing | exchanging a glove, and has shown the structure which can be replaced | exchanged for the interring which hold | maintained the glove to replace | exchange. 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
11 Inner ring
12 Globe
16 Pushing jig
20 Globeport
21 Mating surface
22 Final mating end
23 Temporary locking means

Claims (3)

A closed space having an atmosphere that is harmful to the human body is formed, and work in the closed space can be performed from the outside through a glove, a plastic bag, or the like provided in the wall forming the closed space. It is a glove box port structure to which the inner ring holding these gloves etc. in the glove box is installed, and when replacing the glove etc., by pushing in the new inner ring together with the new glove etc. and pushing out the old glove together with the old inner ring In the port structure of the glove box,
The fitting length of the port with the inner ring is larger than the inner ring,
Stop the inner ring at the final fitting end on the glove box side of the port where the rear end of the inner ring pushed out from the port is located, and remove the inner ring from the inside of the glove box A port structure of a glove box, characterized in that provisional locking means is provided.   The port structure of the glove box according to claim 1, wherein the temporary locking means has a reduced contact area with the inner ring at the final fitting end.   3. The contact area is reduced by forming a recess in a part of the inner peripheral surface of the port at the final fitting end portion, and a portion other than the recess is used as the temporary locking means. The port structure of the glove box described in 1.

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