Airtight work box

Abstract

To provide an airtight type box for work, comprising a large opening which enables direct access into a work space.SOLUTION: The airtight type box for work comprises: a box body having an opening directly connected to an internal work space; and two doors for opening and closing the opening in a double swinging manner. The opening has no support pillar at a place where the two doors are aligned in a closed state, but has a first seal member around it. The two doors are rotatably supported by a movable part having at least three parallel shafts, and has a second seal member provided on one of opposing tip side surfaces of the two doors in the closed state. The second seal member abuts against the two doors of the first seal member to seal the box body. Thus, there is no need to provide a support pillar at a place where the double hinged doors are aligned, and the airtight type box for work having a large opening can be provided.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an airtight work box, and more particularly to an airtight work box having a large opening. [Background technology]

[0002] When handling samples that are easily affected by components in the air or samples that are dangerous to workers, the samples must be placed in an enclosed space and work must be carried out in a manner that prevents contamination from outside or leakage to the outside.

[0003] Patent Document 1 discloses that by providing a side box with a double door adjacent to a glove box, separating the side box from the glove box with a door, and taking samples in and out through the side box, it is possible to prevent dust and other particles from getting into the glove box. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 8-145893 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the glove box described in Patent Document 1, since access to the inside of the glove box is via the side box, it is not possible to put in or take out a device larger than the side box.

[0006] Therefore, in order to take large equipment in and out, it is necessary to provide a separate large door for maintenance purposes or to enlarge the side box to match the size of the equipment, which reduces maintainability.

[0007] The present invention was made in consideration of the problems associated with the prior art, and its purpose is to provide an airtight work box with a large opening that allows direct access into the work space. [Means for solving the problem]

[0008] As a result of extensive research into achieving the above-mentioned object, the inventor discovered that by providing sealing members around the opening and on the tip side surfaces of the double-hinged doors that close the opening and that face each other when closed, and by using these sealing members to seal the gap between the doors and the opening and the gap between the doors themselves, there is no need for a support pillar where the two doors come together, and this led to the completion of the present invention.

[0009] That is, the airtight work box of the present invention comprises a box body having an opening that directly leads to the internal work space, and two doors that open and close the opening in a double swing-out manner. and, The door has at least two through holes formed therein, through which gloves can be attached for work from the outside while maintaining an airtight state. The opening has no support pillar at the location where the two doors join in the closed state, and has a first seal member around the periphery; The two doors are each supported so as to be freely rotatable by a movable part having at least three parallel axes. and are attached to both the left and right or top and bottom ends of the box body. A second seal member is provided on one of the front end side surfaces of the doors facing each other in the closed state, The two doors and the second seal member come into contact with the first seal member to seal the box body. [Effects of the Invention]

[0010] According to the present invention, sealing members are provided around the opening and on the tip side surfaces where the double-hinged doors that close the opening face each other when closed, so that no support pillars are required where the double-hinged doors meet, making it possible to provide an airtight work box with a large opening. [Brief explanation of the drawings]

[0011] [Figure 1]FIG. 1 is a schematic diagram showing an example of an airtight work box of the present invention with the door closed. [Figure 2] FIG. 1 is a schematic diagram showing an example of an airtight work box of the present invention with the door open. [Figure 3] FIG. 2 is a diagram illustrating an example of a movable part. [Figure 4] FIG. 2 is a diagram showing the sealed state of the cross section AA in FIG. [Figure 5] FIG. 4 is a cross-sectional view showing a state in which the second seal member is compressed. [Figure 6] A cross-sectional view showing the closed state of the door with the door lock formed. [Figure 7] FIG. 10 is a diagram illustrating an example of a guide member. [Figure 8] FIG. 10 is a schematic diagram showing another example of the airtight work box of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] The airtight work box of the present invention will now be described in detail. As shown in Figures 1 and 2, the airtight work box has a box body with an internal work space and an opening that leads directly to this work space, and two doors that open and close the opening in a double swing-out configuration.

[0013] The two doors have transparent windows so that the work space can be seen from the outside. The box body may also have a transparent portion formed on its top surface.

[0014] The two doors are rotatably supported by a movable part and attached to both ends of the box. As shown in Figure 3, the movable part has three or more parallel shafts and rotates around the shafts to not only open and close the doors but also move the doors back and forth along the opening surface.

[0015] As shown in Figure 1, a frame is provided on the inner periphery of the opening of the box, and the door fits inside the box using the movable part. As shown in Figure 2, the door abuts against the frame, making the opening surface of the box and the door almost flush with each other, thereby closing the opening.

[0016] A first seal member is provided around the entire periphery of the frame provided around the opening, as shown in Fig. 2. In addition, the two doors have a second seal member that runs continuously from one end to the other on either of the leading edge side surfaces where the doors face each other in the closed state, and seals the gap that occurs between the two doors when they are closed.

[0017] When the doors are closed, as shown in FIG. 4, the end of the second seal member also abuts against the first seal member, and together with the two doors, the second seal member abuts against the first seal member to seal the box.

[0018] In the airtight work box of the present invention, the gap that occurs between the two double-hinged doors when they are closed is sealed with a second sealing member, so that when the box is closed, the opening can be sealed without providing a support pillar at the tip of the door to abut against, and a large opening can be formed without a support pillar.

[0019] Furthermore, as described above, the airtight work box of the present invention has a sealed opening that allows direct access into the work space, allowing the environment of the work space to be maintained, eliminating the need for a side box and resulting in space savings.

[0020] The airtight work box can include a first fixing member and a second fixing member. The first fixing member is a member that presses the door against the box body, compressing the first sealing member and fixing the door to the box body, and the second fixing member is a member that draws the doors together and compresses the second sealing member.

[0021] By closing the two double-hinged doors and pulling them together with the second fixing member and compressing the second seal member, the airtightness between the two doors is improved and the two doors are connected together like a single door. Then, in this state like a single door, by pressing the doors against the box body with the first fixing member, the airtightness between the doors and the box body is improved and this good airtight state can be maintained.

[0022] As the first fixing member, for example, an open / close latch, a push-type toggle clamp, or the like can be used, and as the second fixing member, for example, a pull-type toggle clamp, or the like can be used.

[0023] The compression ratio of the first seal member and the second seal member is preferably 30% or more of the thickness thereof, and more preferably 35 to 50%.

[0024] By compressing the seal material by 30% or more of its thickness, even if there are manufacturing errors due to welding distortion on the opening or the side of the door edge, this can be absorbed and a tight seal can be maintained. Also, if the compression rate exceeds 50%, compression cracks may occur in the seal material, reducing its airtightness.

[0025] The sealing member can be made of rubber or elastomer with a compressive strength that can withstand the above-mentioned crushing rate, i.e., a deformation of 30% or more when cracks occur due to compression, but sponge-like silicone rubber is preferably used. Since the internal voids of sponge-like silicone rubber are crushed by compression, the deformation rate of the silicone rubber itself can be suppressed even when the crushing rate is high, and the compressive strength is increased, so compression cracks in the sealing member can be prevented.

[0026] As shown in Figure 5, when the second fixing member draws the two doors together and compresses the second seal member, it is preferable that the tip side of the door that abuts the second seal member is perpendicular to the direction in which the doors are drawn together, i.e., the in-plane direction of the opening surface (hereinafter sometimes simply referred to as the "opening surface direction").

[0027] As the second seal member is compressed by the tip side surface perpendicular to the opening surface direction, the compression force is transmitted efficiently to the second seal member, preventing distortion of the second seal member, and allowing the second seal member to adhere uniformly to the tip side surface, thereby maintaining a good sealing state.

[0028] In addition, the second seal member is crushed by compression from the tip side surface, protrudes from the tip side surface to escape the compressive force, and its end abuts against the first seal member on the opening surface together with the door, so no gaps are created at the point where the three elements - the box body and the two doors - intersect.

[0029] At this time, the two doors and the second seal member sandwiched between them are not flush, as shown in Figure 5, and the second seal member protrudes beyond the doors, so the force pressing against the first seal member is locally large at the protruding part. However, because the seal member is made of sponge-like silicone rubber that is soft and has high compression resistance, the seal members absorb this protrusion and adhere to each other without creating gaps.

[0030] As shown in Figure 6, it is preferable that the two doors have thinner sections at their leading ends, and when closed, these thinner sections join together to form a stepped joint in cross section.

[0031] By fitting the second seal member only on the tip side surface closest to the box body, the compression area of the second seal member is reduced and the surface pressure is increased. This increases the amount of protrusion toward the first seal member, allowing the end of the second seal member to tightly contact the first seal member.

[0032] When the two doors join together, it is preferable that a second seal member is also provided on a surface parallel to the opening surface direction, as shown in Figure 6. By providing a continuous second seal member that is bent from a surface perpendicular to the opening surface direction to a surface parallel to the opening surface direction at the door tip side, it is possible to prevent the second seal member from peeling off when the doors are opened and closed.

[0033] In the present invention, since the door slides toward the opening surface, it is preferable to apply a lubricant to the area where the first seal member and the door come into contact. Applying a lubricant here prevents the first seal member from sticking, prevents the first seal member from twisting, maintains close contact with the door, and prevents peeling when opening and closing.

[0034] The lubricant should be one that prevents the first seal member and the door from sticking, and can be a liquid lubricant, a solid lubricant, or the like, but it is preferable to use a sliding powder made from wax stone, talc, etc. Dust and other particles do not easily adhere to the sliding powder, so there is no risk of foreign matter getting caught between the first seal member and the door.

[0035] Furthermore, the door of the present invention not only opens and closes, but also slides toward the opening surface and is movable in two axial directions, so it is preferable to have a guide member that guides the closing operation of the door.

[0036] As shown in FIG. 7, the guide member may be a combination of a pin and a plate having a through hole through which the pin can slide. Specifically, by having a pin on the box body pass through a through hole in a plate on the door, the door can be guided to the appropriate position where it can press the first sealing member evenly, thereby ensuring that the opening is sealed.

[0037] The two doors have a total of at least two through holes, and at least one pair of gloves is attached to these through holes so that the through holes can be covered and work on the sample in the work space can be performed from outside while maintaining an airtight state.

[0038] When the above-mentioned double doors are opened and closed in the left and right directions, it is preferable that one glove is provided on each door so that the two doors together form a pair of gloves.

[0039] By providing one glove per door, a pair of gloves can be attached at positions roughly symmetrical about the center line of the opening, i.e., in the center of the work space, allowing for work to be carried out in an efficient manner.

[0040] In this case, as shown in Figure 8, it is preferable to make the sizes of the left and right doors different and offset the position where the doors join together in the closed state from the center line of the opening so that it is not directly in front of the worker.

[0041] By changing the sizes of the left and right doors, the work space can be seen mainly through one of the doors, so the worker's view is not obstructed by the area where the doors meet, and good visibility can be obtained.

[0042] In addition, if the double doors open and close vertically, placing a pair of gloves on the lower door allows the worker to see the work space through the upper door.

[0043] The distance between the pair of gloves is approximately 40 to 50 cm, and the distance from the gloves to the top of the door is approximately 50 to 80 cm. [Explanation of symbols]

[0044] 1 Airtight work box 2 box body 21 first seal member 22 First fixing member 23 Frame 3 doors 31 second seal member 32 Second fixing member 33 Tip side 34 Transparent Window 4 Moving parts 5 Guide member 51 pin 52 board 6. Gloves S workspace O Opening surface C Chuo line

Claims

1. a box body having an opening directly communicating with an internal working space; An airtight work box having two doors that open and close the opening in a double swing-open manner, The door has at least two through holes formed therein, through which gloves can be attached for performing work from the outside while maintaining an airtight state, The opening has no support pillar at the location where the two doors join in the closed state, and has a first seal member around the periphery; The two doors are each rotatably supported by a movable portion having at least three parallel shafts and attached to both left and right or top and bottom ends of the box body, and a second seal member is provided on either of the leading end side surfaces of the doors facing each other in a closed state, An airtight work box characterized in that the two doors and the second seal member abut against the first seal member to seal the box body.

2. moreover, A first fixing member and a second fixing member are provided, the first fixing member presses the door against the box body, compressing the first seal member and fixing it to the box body; 2. The airtight work box according to claim 1, wherein the second fixing member pulls the doors together and compresses the second sealing member to fix the doors together.

3. The two doors above open and close to the left and right, 3. The airtight work box according to claim 1, wherein each of the two doors is provided with one pair of gloves.

4. The position where the doors meet in the closed state is offset from the center line of the opening, 4. The airtight work box according to claim 3, wherein one glove provided on each of the two doors is provided symmetrically with respect to the center line of the opening.

5. The two doors above open and close vertically, 3. The airtight work box according to claim 1, wherein the lower door is provided with a pair of gloves.

6. 6. The airtight work box according to claim 1, wherein the compression ratio of the first seal member and the second seal member is 30% or more of their thickness.

7. 7. The airtight work box according to claim 1, wherein the first seal member and the second seal member are made of sponge-like silicone rubber.

8. An airtight work box as described in any one of claims 2 to 7, characterized in that the tip side of the door that abuts against the second seal member is perpendicular to the direction in which the doors are pulled together.

9. The two doors have thinner portions at the front end, forming a stepped doorway when closed. The airtight work box according to claim 8, characterized in that the second sealing member is provided only on the tip side surface closest to the box body among the tip side surfaces perpendicular to the direction in which the doors are pulled together.

10. 10. The airtight work box according to claim 9, wherein the second seal member is bent along the joint and is also provided on a surface parallel to the direction in which the doors are pulled together.

11. 11. The airtight work box according to claim 1, wherein a lubricant is applied to a portion where the first seal member and the door come into contact.

12. 12. The airtight work box according to claim 1, further comprising a guide member for guiding the closing operation of the two doors.

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