JP3980257B2 - Expansion joint for clean room - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an expansion joint for a clean room, and more particularly to an expansion joint for a clean room that is easy to construct and can maintain high airtightness.
[Prior art]
In conventional expansion joints, an expansion joint cover that covers the clearance between the housings according to its application, specifications, and installation location, and a water stop plate and a fireproof zone that can follow a predetermined amount of displacement are provided in the joint mounting space. Yes. In particular, when an expansion joint is provided in an opening or the like that connects the housings, a joint portion that follows a three-dimensional displacement is formed in a corner portion that connects the floor, wall, and ceiling.
[0002]
[Problems to be solved by the invention]
By the way, in expansion joints used in clean rooms where high airtightness is required, a sound insulation sheet is installed between the enclosures in order to maintain sound insulation performance in addition to waterstops, fireproof zones, etc. Is done. The water stop plate used was a gasket made of synthetic resin, and the sound insulation sheet was made of lead, EPT, a sheet of soft PVC product, or the like. It is difficult to maintain the airtightness with the conventional technology and materials, and there is a problem in the construction of the corner portion in particular. Conventionally, the joining operation of the corner portion has been a method in which the dimensions are adjusted on site and bonded using a vinyl chloride adhesive. For this reason, on-site work becomes complicated, and there is a concern about maintaining airtightness.
[0003]
Moreover, when a fireproof zone and an airtight sheet are constructed on the wall and ceiling, since none of the materials has shape retention, the material can be freely deformed in an attached state. For this reason, when the airtight sheet is deformed, if the airtight sheet is pressed by the fireproof material and touches the hardware of the expansion joint cover, the airtight sheet may be damaged.
[0004]
Therefore, the object of the present invention is to solve the above-mentioned problems of the prior art, easy to attach to the expansion joint part, follow the displacement generated between the housings, and maintain its airtightness. An object of the present invention is to provide an expansion joint for a clean room that can be held.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an airtight sheet in the joint mounting space between the housings, and an end of the mounting bracket which is located outside the airtight sheet and a part of which is substantially Z-shaped in section along the housing. The refractory belt attached to the part and positioned at the back of the mounting space, and the airtight sheet was kept in a substantially U shape, with a predetermined interval in the longitudinal direction of the sheet, along the airtight sheet The first elastic shape-retaining material and attached to the tip of the mounting bracket, while spreading the refractory zone from the inner surface so that the outer surface of the refractory zone abuts against the opposite housing surface, A second elastic shape-retaining material curved between the hermetic sheet and the fire-resistant zone so that the cross-sectional shape of the fire-resistant zone is substantially U-shaped, and the clearance between the housings is expanded Covered with a joint cover And features.
[0007]
At this time, the elastic shape-retaining material is preferably a polycarbonate plate.
[0008]
When the above-described expansion joint is used for a corner portion, a bowl-shaped U-shaped section having a width corresponding to the clearance width between the casings and a flange integrally connected to both sides of the U-shaped section are orthogonal to each other. A corner joint member having a joined shape and having a thin steel plate as a core material and both surfaces of which are covered with a rubber-coated sheet is installed at the corner of the opening, and a predetermined length is provided at the end of the corner joint member in the longitudinal direction. It is preferable to secure a wrap length and join the corner joint member and the end portion of the airtight sheet, which is provided in the clearance portion between the casings, and which is shaped by the first elastic shape-retaining material. .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of an expansion joint for a clean room according to the present invention will be described with reference to the accompanying drawings.
[0010]
FIG. 1 is a sectional view showing a type applied to a wall and a ceiling among the expansion joints of the present invention. FIG. 2 is a schematic perspective view showing the expansion joint attached to the wall portion from above.
The configuration of the expansion joint 1 will be described with reference to FIG. An edge 5 of a square tube held by a base material 4 made of lightweight channel steel is attached to the end of the face plate 3 extending from each end face of the adjacent concrete frame 2. Furthermore, with the edge member 5 as an end portion, two wall plate members 6 and 6 such as a particle board are laminated and pasted so that a step 7 having a predetermined width is generated. This stepped portion 7 serves as a mounting portion for the expansion joint cover 25 described above.
[0011]
A substantially U-shaped refractory belt 11 is attached to the inner part of the joint mounting space 10 having a predetermined clearance so that the release side is the front side. As the refractory band 11, for example, alumina ceramic bracket is to be adapted to the 1 hour fire (thickness 12.5 mm) or the like is used. At both ends of the refractory belt 11 along the wall extending direction, attachment hardware 13 having a substantially Z-shape is attached. With the attachment hardware 13 attached, the refractory belt 11 is accommodated in the joint attachment space 10 and attached. The hardware 13 is fixed to the stepped portion 7 with a countersunk screw (not shown).
[0012]
Further, FIG. 1 shows a strip-shaped shape retaining plate 15 which is similarly elastically deformed into a U shape on the inner surface side of the refractory belt 11. In this embodiment, the shape retaining plate 15 is made of a resin strip having a width of 20 mm, and is disposed inside the fireproof strip 11 at intervals of 450 mm in the wall extending direction. In the state shown in FIG. 1, the shape retaining plate 15 is curved in a U-shaped leaf spring shape, and a part 15a of the side surface of the shape retaining plate 15 is refractory so as to spread the fire resistant strip 11 outward. 11 is in contact with the inner surface. For this reason, the outer surface 11 a on both sides of the refractory belt 11 is in close contact with the face plate 3 of the joint mounting space 10. Further, the curved vertex of the shape retaining plate 15 is in contact with the inner surface of the center position of the fireproof belt 11. In this embodiment, polycarbonate is used as the material for the shape-retaining plate 15, but other resin materials called engineering plastics having self-extinguishing properties such as polyacetal (POM), polyphenylene ether (modified PPE), etc. It can also be used. The arrangement pitch and the plate size can also be appropriately set according to the clearance width, the specifications of the refractory zone 11, and the like.
[0013]
Further, a U-shaped airtight sheet 20 is attached to the front side of the refractory belt 11. In this embodiment, the airtight sheet 20 is made of vulcanized rubber having a thickness of 4 mm. As other materials, chloroprene rubber is suitable. The end of the sheet is sandwiched between the attachment hardware 13 attached to the stepped portion 7 and the presser plate 22. Since the airtight sheet 20 is a flexible sheet, the shape is not originally maintained. Therefore, a shape retaining plate 21 that retains the airtight sheet 20 in a U shape is attached to the inside of the airtight sheet 20 at a pitch equivalent to the shape retaining plate 15 of the refractory belt 11. The end portion of the shape retaining plate 21 is sandwiched and fixed between the attachment metal 13 and the presser plate 22 together with the end portion of the airtight sheet 20. An aluminum presser foot 23 for adjusting the thickness is attached to the upper surface of the presser plate 22. Further, a known expansion joint cover 25 is fixed by an anchor plug 26 so as to cover the clearance portion and the entire presser foot 23.
[0014]
FIG. 2 is a perspective view showing an embodiment in which the expansion joint shown in FIG. 1 is applied to a roof portion. The expansion joint 1 described above is mounted in the joint mounting space 10 between the adjacent casings 51 and 52. At this time, urethane foam resin 54 is densely injected into the space on the back surface of the square wave plate 53 that covers the outer walls of the existing building 51 and the new building 52 adjacent to each other with a predetermined clearance. As shown in the figure, the expansion joint 1 is held in a substantially U shape by the plate spring action of the shape retaining plates 15 and 21 provided on the fireproof belt 11 and the airtight sheet 20, respectively. In addition, since rainwater etc. are interrupted | blocked by the upper roof coping (not shown) part, the water stop board is not installed in the expansion joint 1. FIG.
[0015]
FIG. 3 is a cross-sectional view showing an expansion joint 1 installed in a clearance portion between floors as another embodiment. A refractory belt 11 is attached to an edge member 5 of a square tube attached to an end of the floor concrete 2 via an attachment metal 13. Since the refractory belt 11 has a convex shape downward in a normal state, the shape retaining plate is not attached unlike the case of the wall and ceiling (roof). An airtight sheet 20 is attached to the upper side of the refractory zone 11. The airtight sheet 20 is provided with a shape retaining plate 29 at a predetermined interval in the sheet longitudinal direction. The airtight sheet 20 is held in a substantially U shape by the shape retaining plate 29. Further, an expansion joint cover 25 having a known shape is attached by an anchor plug 26 so as to cover the airtight sheet 20 and the joint attachment space 10.
[0016]
Next, the structure of the joint used for the joint of the corner part of the wall and floor and the wall and ceiling (roof) mentioned above is demonstrated with reference to FIG. 4, FIG.
FIG. 4 is a perspective view showing a corner joint member 30 that joins the airtight sheet 20 at the corner. The corner joint member 30 is an integrally processed product in which a bowl-shaped U-shaped portion 31 having a width corresponding to the clearance width and a flange 32 connected to the U-shaped portion 31 are joined so as to be orthogonal to each other. For the corner joint member 30, a laminated plate is used in which a 4 mm thick vulcanized rubber covering sheet 34 constituting the airtight sheet 20 is laminated with a 3 mm thick thin steel plate 33 as a core material.
[0017]
FIG. 5 is a perspective view showing the periphery of the opening 55 in which a corner joint member is used at the corner. In the drawing, the expansion joint cover is removed for the sake of explanation. Corner joint members 30 are attached to the corners of the four corners of the floor 55, the wall, and the ceiling of the opening 55. An airtight sheet (not shown) is connected to the end portion of the corner joint member 30 while ensuring a predetermined wrap length. Further, the refractory zone 11 is also finished in a predetermined joint shape at the corner portion, and a thermally expandable putty is used at the joining portion. As described above, the shape-retaining material 15 is disposed on the inner surface of the refractory belt 11 in the wall portion. When the refractory belt 11 is installed so as to rise along the wall, the substantially U-shape of the refractory belt 11 is provided. The shape is maintained. Also in this case, a polycarbonate plate material is suitable as the shape retaining material 15, and it is only necessary to place the sheet on the shape retaining material 15 so as to be in contact therewith. Moreover, the edge part of the shape-retaining material 15 is fixed by the arch action at the time of curving a board | plate material, and a fireproof zone and an airtight sheet | seat can be shape-retained in this state.
[0018]
【The invention's effect】
As described above, by maintaining the shape of the fireproof zone and the airtight sheet attached to the expansion joint part, it is possible to prevent damage to the member during deformation at the expansion joint, and to employ joint members at the corners. As a result, the airtightness of the opening can be maintained.
[Brief description of the drawings]
FIG. 1 is a partial sectional view showing an embodiment of an expansion joint (wall) for a clean room according to the present invention.
FIG. 2 is a perspective view showing an example in which the expansion joint for a clean room according to the present invention is applied to a roof.
FIG. 3 is a partial sectional view showing an embodiment of a clean room expansion joint (floor) according to the present invention.
FIG. 4 is a schematic perspective view showing a corner joint member.
FIG. 5 is a partial perspective view showing the installation state of the corner joint member, the airtight sheet, and the fireproof zone in the opening partly cut away.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Expansion joint 2 Housing 5 Edge material 10 Joint attachment space 11 Fireproof zone 15, 21, 29 Shape-retaining board 20 Airtight sheet 25 Expansion joint cover

Claims (2)

In the joint mounting space between the housings, an airtight sheet and a part of the airtight sheet are attached to the end of a mounting bracket having a substantially Z-shaped cross section along the housing, and the inner part of the mounting space. A fire-resistant zone positioned on the sheet, a first elastic shape-keeping material along the hermetic sheet at a predetermined interval in the longitudinal direction of the sheet so as to retain the hermetic sheet in a substantially U shape, and the attachment The cross-sectional shape of the refractory band is kept substantially U-shaped while being spread out from the inner surface so that the outer surface of the refractory band is abutted against the opposite casing surface at a part thereof attached to the tip of the metal fitting. A second elastic shape-retaining material curved between the hermetic sheet and the fireproof zone so as to form, and a clearance between the housings is covered with an expansion joint cover, Exhaust for clean room Pansion joint. A thin steel plate having a shape in which a bowl-shaped U-shaped part having a width corresponding to the clearance width between the casings and flanges integrally connected to both sides of the U-shaped part are orthogonally joined to each other. The corner joint member whose both surfaces are coated with a rubber coating sheet is installed at the corner of the opening, and a predetermined wrap length is secured at the longitudinal end of the corner joint member, and the corner joint member 2. An expansion joint for a clean room according to claim 1, wherein an end portion of the airtight sheet, which is provided in a clearance portion between the housings and is held by the first elastic shape-retaining material, is joined. .

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