JP4147335B2 - Glove attachment - Google Patents

Description

  The present invention relates to a glove box that handles equipment and the like in a sealed state, and more particularly, to a glove wearing device that attaches a glove to a glove port in an airtight manner.

  For example, when handling contaminants such as radioactive substances, the contaminants are handled in a sealed negative pressure glove box in order to ensure the safety of workers. In this glove box, for example, a transparent acrylic panel is attached to one side of a stainless steel housing, a glove port having a cylindrical inner surface is attached to a circular through-hole formed in the panel, and the glove is sealed in the glove port. It is configured by attaching to.

  2. Description of the Related Art Conventionally, a glove for operating devices in a glove box is used with a base end of the glove attached to a ring inserted into a glove port. On the outer peripheral surface of the ring on which the globe is mounted, an O-ring having a circular cross section is mounted, and the gap between the ring and the inner peripheral surface of the globe port is hermetically sealed.

  By the way, a glove, an O-ring and the like are formed of an elastic material, and there is a risk that contaminants may leak from the deteriorated portion due to deterioration with time. Therefore, it is necessary to exchange them periodically for each ring. To replace the ring, insert the ring with a new glove from the back of the existing ring into the glove port, push the existing ring forward, and drop it into the glove box. (For example, refer to Patent Document 1).

Japanese Utility Model Publication No. 6-57585 (Fig. 1-4)

  However, according to the method using the ring described above, the replacement work of the glove becomes easy, but there is a problem that the axial width of the ring becomes large. That is, a plurality of annular grooves are formed on the outer peripheral surface of the ring. For example, the annular groove on the front side in the axial direction of the ring is used to clamp and fix the base end of the globe with an O-ring from the outer peripheral side. The other annular groove is used for mounting an O-ring that seals a gap with the inner peripheral surface of the glove port. Here, the O-ring that sandwiches the globe in the annular groove is formed to have a small annular diameter, for example, so as not to contact the inner peripheral surface of the globe port when the ring is inserted into the globe port.

  As described above, a plurality of annular grooves are required for each function on the outer peripheral surface of the ring, and the total length (width) becomes long in order to install these at predetermined intervals. However, as the overall length of the ring increases, the overall length of the glove port that supports the ring must also be increased, and the range in which the operator puts his arm into the glove port and works through the glove becomes narrower. There is a problem that operability is deteriorated.

  This invention makes it a subject to shorten the full length of a glove port.

In order to solve the above-mentioned problems, a glove wearing device of the present invention includes a ring having a cylindrical outer surface inserted into a glove port having a cylindrical inner surface attached to a glove box, and an annular groove formed on the outer peripheral surface of the ring. In the glove wearing device comprising a packing made of an elastic material that sandwiches the base end of the glove inserted into the glove box with the groove bottom of the annular groove, A convex raised portion is formed over the entire circumference, and the packing has a flat surface on the surface that contacts the inner circumferential surface of the glove port, and a groove containing the raised portion extends over the entire circumference of the packing. It is characterized by being formed .

  When a glove wearing device having such a configuration is inserted into the glove port, the flat surface of the packing is brought into contact with the inner peripheral surface of the glove port and receives a pressing force on the entire flat surface, so that twist due to friction is suppressed. The pressure can be stably transmitted to the glove. That is, with one packing, the glove can be fixed and the gap between the inner circumferential surface of the glove port can be sealed at the same time, so the number of packings can be reduced, and the total length of the ring and glove port can be shortened accordingly. it can. In this case, it is desirable that the cross-sectional shape of the packing is a rectangle that is long in the axial direction. According to this, the fixing force of the globe and the airtightness with the inner peripheral surface of the globe port can be kept high.

Here, the ring convex ridge is formed over the entire circumference at the bottom of the annular groove, because the groove in the packing so as to include a raised portion is formed, during the ring insertion, in packing groove The storage stability of the packing is improved and the fixing force of the glove can be increased.

  Further, it is preferable that the packing is formed with a convex lip at least on the surface that contacts the inner peripheral surface of the globe port. According to this, the airtightness between the inner peripheral surface of the globe port can be further improved.

  According to the present invention, the overall length of the globe port can be shortened.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, the whole structure of a glove box is demonstrated using FIG. The glove box 51 is a housing whose inside is adjusted to a negative pressure and hermetically isolated from the outside. A transparent panel 1 made of, for example, acrylic is formed on one side of the glove box 51, and a glove port 5 is attached to a through hole of the panel 1. A rubber glove 11 is attached to the glove port 5 at a position necessary for work in the glove box 51. On the other hand, the glove port stopper 8 is attached to the glove port 5 to which the glove 11 is not attached, and is hermetically closed. The glove 11 is normally fixed by binding both hands while being pulled out of the glove box 51. When the glove 11 is used, the glove 11 is inserted into the glove box 51 from the glove port 5, and the operator can Work is done in the glove box.

  Next, a glove wearing tool for attaching the glove 11 to the glove port 5 described in FIG. 4 will be described. FIG. 1 is a cross-sectional view showing a state where a ring 25 to which the present invention is applied is inserted into the globe port 5.

  As shown in FIG. 1, a glove port 5 is attached to the through hole 3 of the panel 1 of the glove box 51 so that the cylindrical portion 7 protrudes outward. In other words, the globe port 5 is airtightly attached with a hook-like attachment portion 9 formed at the base end portion in contact with the inside of the panel 1. An end portion of the cylindrical portion 7 is an insertion port 13 for an operator to insert an arm. A first step portion 15 having an outer diameter slightly smaller than the diameter of the through hole 3 is formed on the cylindrical portion 7 side of the attachment portion 9, and the first step portion 15 has a first step portion 15 on the cylindrical portion 7 side. A second step portion 17 having an outer diameter between the step portion 15 and the cylindrical portion 7 is formed. The globe port 5 formed in this way is inserted into the through-hole 3 of the panel 1 from the inside, and an annular flange 19 is fitted from the outside, and the periphery of the through-hole 3 between the attachment portion 9 and The panel 1 is sandwiched and fixed by a plurality of bolts 21. Here, the flange 19 is in airtight contact with the panel 1 via the sealing material 23, but as shown in the figure, the sealing material 23 is interposed in the gap between the panel 1 and the globe port 5 in a U-shaped cross section. It is preferable.

  A cylindrical ring 25 is inserted into the globe port 5 from the insertion port 13. Two packing grooves 27 are formed on the outer peripheral surface of the ring 25, and packings 29 are attached to the two packing grooves 27, respectively. The packing 29 is configured such that the base end portion of the globe 11 is sandwiched between the packing groove 27 and the base end portion of the globe 11 is fixed in the groove.

  An annular locking groove 31 is formed on the inner peripheral surface of the rear end portion of the ring 25, and the inner peripheral end portion of the annular fixing jig 33 having a U-shaped cross section is locked to the locking groove 31. On the other hand, the outer peripheral end portion of the fixing jig 33 is locked to a locking groove 35 formed on the outer peripheral surface of the globe port 5. That is, the fixing jig 33 connects the ring 25 to the glove port 5 and fixes the ring 25 so as not to be sucked into the negative pressure glove box 51.

  Here, the ring 25, the packing 29, and the packing groove 27 which comprise the glove mounting tool which are the characterizing parts of this embodiment are demonstrated in detail. FIG. 2 is a cross-sectional view showing an example of a state in which the packing 29 is mounted in the packing groove 27 of the ring 25. Here, the case where only one packing 29 is attached is shown. As shown in the drawing, the base end portion of the globe 11 is sandwiched between the packing 29 and the groove surface of the ring 25. The cross section of the packing 29 is formed in a rectangular shape whose longitudinal direction is long, and two corners on the outer peripheral side are chamfered. On the other hand, the packing groove 27 has an inverted trapezoidal cross section, and the groove width is set so that the packing 29 does not shift in the groove when the ring 25 is inserted into the globe port 5.

  FIG. 3 is a cross-sectional view showing another embodiment of FIG. The packing 36 and the packing groove 27 of the present embodiment are different from the configuration of FIG. 2 in that a raised portion 37 having a trapezoidal cross section is formed on the groove bottom of the packing groove 27 so as to protrude over the entire circumference. A groove portion 39 is formed on the inner peripheral side of 36 so as to enclose the raised portion 37. That is, the packing 36 has a U-shaped cross section, and comes into contact with the groove bottom from both sides sandwiching the raised portion 37. In addition, two lips 41 having a substantially triangular cross section are formed on the outer peripheral surface of the packing 36 over the entire circumference.

  Next, the operation of this embodiment will be described. When the ring 25 to which the packing 29 having a rectangular cross section is attached is inserted into the globe port 7, the flat surface on the outer peripheral side of the packing 29 comes into contact with the inner peripheral surface of the globe port 7 and elastically deforms in the radial direction. Along with this elastic deformation, the globe 11 in the packing groove 27 is pressed against the groove surface from the packing 29 and fixed, and the outer peripheral surface of the ring 25 and the inner peripheral surface of the globe port 7 are kept airtight. Here, since the packing 29 of this embodiment receives a pressing force on the entire flat surface, even if it receives friction from the inner peripheral surface of the globe port 7 when the ring 25 is inserted, it is stably stored in the groove, There is no twisting or misalignment of the packing that tends to occur when using a ring. Therefore, the pressing force applied to the globe 11 is stabilized, and the fixing force with respect to the packing groove 27 can be maintained high.

  That is, the packing 29 according to the present embodiment functions to fix the globe 11 and seal the gap between the globe port 7 at the same time, and even when the number of the packings 29 is small, these functions can be sufficiently exerted. . And by reducing the number of packings 29, the width of the ring 25 and the total length of the globe port 5 can be shortened. Note that the glove port 5 of FIG. 1 is set to a conventional length in order to show the effect of the present embodiment, but as is apparent from the figure, a constant inner diameter range from the insertion port 13 to the through hole 3. Is compared with the total length of the ring 25, it can be seen that the total length of the glove port 5 can be greatly shortened.

  Further, as shown in FIG. 3, the packing 36 has a U-shaped cross section, and the raised portion 37 in the packing groove 27 is included and attached, so that the storage stability of the packing 36 when the ring 25 is inserted is improved. The fixing force of the globe 11 can be increased. Furthermore, by forming the lip 41 on the outer peripheral surface of the packing 36, that is, the portion that contacts the inner peripheral surface of the globe port 5, the airtightness between the packing 36 and the inner peripheral surface of the globe port 5 can be further improved. it can.

  Although the packings 29 and 36 have been described in the present embodiment, the packing is not limited to these as long as a flat surface is formed on the surface that contacts the inner peripheral surface of the globe port 5. Further, the packing groove 27 is not limited to the shape of the raised portion 37. Further, if the lip 41 is formed on at least the outer peripheral side flat surface of the packing 36 and, in addition to this, for example, formed on the surface that contacts the groove bottom, the fixing force of the globe 11 can be further improved.

  As described above, according to the present embodiment, the number of the packings 29 and 36 to be mounted on the outer peripheral surface of the ring 25 can be greatly reduced, so that the total axial length of the ring 25 and the globe port 5 can be shortened. it can. Thereby, the area | region where an operator works inside a glove box 51 via a glove is expanded, and work efficiency is improved significantly. Further, as the overall length becomes shorter, the material cost of the globe port 5 and the amount of waste are reduced, which is economical.

  Further, the airtightness of the glove port 5, the glove 11 and the ring 25 is improved, and the ring 25 can be hermetically sealed from the end in the insertion direction, thereby reducing the contamination area due to the diffusion of contaminants and further improving safety. Can be made.

Next, the results will be described of evaluating the insertion of wearability and ring Globe with packing and rings according to the present invention. As shown in FIG. 5, the ring 61 used in this evaluation has a single packing groove 63 on the outer peripheral surface, and a packing 65 is attached to the packing groove 63. In the packing groove 63, a protruding portion 67 is formed on the entire bottom surface of the groove, and a U-shaped packing 65 having a groove formed therein is accommodated so as to enclose the protruding portion 67. A flat surface is formed on the outer periphery of the packing 65, and three lips 69 are formed on the flat surface at regular intervals over the entire periphery. The surface of the packing 65 is subjected to Teflon (registered trademark) treatment or PTEF (polytetrafluoroethylene) treatment. The packing material is EDPM (ethylene-propylene rubber).

  The ring 61 in which the base end portion of the globe 71 is sandwiched between the packing 65 and the packing groove 63 is inserted into the globe port 5 and removed, and then the state of the globe 71 and the packing 65 is confirmed. In addition, the insertability of the ring 61 into the globe port is also confirmed. The insertability is evaluated by measuring a load (static load) when inserted into the glove port 5 by applying a predetermined load (maximum 980 N) from the rear of the ring 61 using a known compression tester.

  As a result of the evaluation, first, the attachment and removal of the packing 65 with respect to the packing groove 63 could be easily performed regardless of the packing surface treatment method. In addition, as a state of the glove 71 after the ring 61 was inserted, the inclined surface 73 of the packing groove 63 was not wrinkled or dubed of the glove 71, and there was no damage. That is, it has been found that when the ring 61 is inserted, the packing 65 does not cause stagnation or the like, and the globe 71 can be stably fixed. In addition, the load when the ring 61 is pushed in is 800 to 900 (N) regardless of the packing surface treatment method, and the use conditions (980 N or less) are satisfied. It was.

It is sectional drawing which shows the state which inserted the glove mounting tool of this invention in the glove port. It is. It is sectional drawing which shows one Embodiment of the packing which concerns on this invention, and a packing groove | channel. It is sectional drawing which shows other embodiment of the packing which concerns on this invention, and a packing groove | channel. It is a perspective view which shows schematic structure of one Embodiment of the glove box which concerns on this invention. It is sectional drawing which shows the packing and packing groove | channel used for evaluation of the packing which concerns on this invention, and a packing groove | channel.

Explanation of symbols

5 Glove port 11, 71 Glove 25, 61 Ring 27, 63 Packing groove 29, 36, 65 Packing 37, 67 Raised part 39 Groove part 41, 69 Lip 51 Glove box

Claims (2)

A ring having a cylindrical outer surface to be inserted into a glove port having a cylindrical inner surface attached to the glove box, and a base of the glove to be inserted into the glove box, which is attached to an annular groove formed on the outer peripheral surface of the ring. In a glove wearing device comprising a packing made of an elastic material that sandwiches an end portion with a groove bottom of the annular groove ,
At the bottom of the annular groove, a convex ridge is formed over the entire circumference,
The packing has a flat surface on a surface that contacts the inner peripheral surface of the glove port, and a groove that includes the raised portion is formed over the entire circumference of the packing. . The glove wearing device according to claim 1, wherein the packing is formed with a convex lip on at least a surface contacting the inner peripheral surface of the glove port .

Images