JP4059763B2 - Seismic fixing bracket - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fixing bracket for fixing a column base portion of a facility device to a free access floor constituting the floor when installing the facility device on a floor in a clean room. It is related to high anti-earthquake fixing brackets.
[0002]
[Prior art]
Conventionally, for example, in a clean room for semiconductor manufacturing, a square aluminum plate with a punching hole called a free access floor is generally used as the floor material, and a plurality of these plates are arranged to constitute a floor. Yes. This floor structure has a punching hole so that the airflow in the clean room can be dropped under the floor, and can be easily removed for maintenance and inspection of the electric wires and pipes laid under the floor. Normally, this punching hole has a diameter of 8 to 12 mm, but the latest clean room has a diameter of 8 mm in order to suppress vibration generated during movement of a carriage or the like.
[0003]
When installing equipment such as shelves on the floor of such a free access floor structure, it is necessary to take seismic measures and fix it to the floor. Therefore, as shown in the perspective view of FIG. 5, conventionally, the free access floor 11 is subjected to processing such as drilling, and the free access floor 11 is partially removed to open the floor, and the free access provided therebelow. A fixing bracket 13 is attached to the support leg 12 of the floor, and the equipment 10 is fixed to the free access floor 11 through a long bolt 14 in a hole drilled in the free access floor 11 via the fixing bracket 13 (for example, cited reference) 1).
[0004]
However, equipment such as shelves is frequently moved due to layout changes in the clean room, etc., and it is necessary to process the free access floor and attach the fixtures each time. In addition, the machining operation is a dust generation operation in a clean room, and there is a problem that the environment in the clean room is contaminated. On the other hand, under the floor of the clean room, a height of 2 to 3 m is necessary for its function, and the work with the free access floor opened is extremely dangerous.
[0005]
Therefore, in order to solve the above problem, there has been a demand for a fixture that can fix equipment without processing or opening the free access floor. For this purpose, we have proposed a bracket that uses a lock bolt with a hook at one end, hooks this hook into a punching hole on the free access floor, and fastens the other end with a nut to fix equipment via a lock plate. (For example, see cited document 2). However, since this fixing bracket is provided with a screw on the lock bolt, there is a risk of damage from the screw part when a large external force is applied, and the predetermined strength cannot be obtained, so that it is not reliable for earthquake resistance measures There was a problem.
[0006]
[Patent Document 1]
Japanese Patent Publication No. 06-047864 (Fig. 1)
[Patent Document 2]
No. 07-043951 (Fig. 1)
[0007]
[Problems to be solved by the invention]
The present invention has been made in order to solve these problems, and by installing a fixing bracket using a punching hole of the free access floor without performing on-site processing on the free access floor, The purpose is to provide a fixture with excellent seismic strength that can eliminate dust generation and improve construction safety, and can flexibly cope with frequent layout changes of equipment.
[0008]
[Means for Solving the Problems]
The present invention relates to an anti-seismic fixing bracket used when installing equipment on a floor in a clean room composed of free access floors in which punching holes are arranged in a grid pattern, and the column base of the equipment is used. A column base fixing plate for pressing and fixing the portion to the free access floor, a press plate freely superimposed on the column base fixing plate, and a parallel pair opened on the column base fixing plate across the press plate The punch plate has a tip bent into a punching hole in the free access floor through a long hole, a U-shaped hook that hooks the tip, and a press plate by screwing into a screw hole provided in the press plate And a bolt that raises and lowers the hook. Raised, hooks have to be able to enter into pressing the column base fixing plate to the raised floor in the lower end of the bolt at the same time locked to the punched holes in the raised floor, to secure the equipment.
[0009]
Further, in the present invention, the center interval between the pair of parallel long holes provided in the column base fixing plate is an integral multiple of the pitch interval of the punching holes formed in the free access floor. the length of the parallel pair of long holes formed, a plurality of punching holes long Satoshi comprises in a row, respectively, further, the center spacing of the U-shaped portion of the U-shaped hooks open raised floor It is set to be an integral multiple of the pitch interval of the punched holes.
[0010]
Further, in the present invention, two hooks are used and straddle the holding plate at two places. The holding plate is provided with screw holes for screwing bolts at both ends, and the bolts are screwed on the outside of the two hooks and tightened. And a pair of parallel elongated holes having the same shape as that provided in the column base fixing plate, and the hook extends over the retaining plate through the elongated holes, or The pressing plate is a single plate that does not have a long hole, and the hook extends in the width direction of the single plate.
[0011]
In the present invention, two hooks are used and straddle the holding plate at two locations. The holding plate is provided with a screw hole for fastening a bolt at one intermediate portion, and the bolt is interposed between the two hooks. In addition, a pair of parallel oblong holes of the same shape as that provided in the column base fixing plate is formed in the retainer plate, and the hook may be straddled on the retainer plate through the oblong hole. Alternatively, the pressing plate is a single plate that does not have a long hole, and the hook extends in the width direction of the single plate. Furthermore, when a screw hole for fastening a bolt is provided at one location in the middle of the pressing plate, convex edge portions are provided at both ends of the pressing plate to prevent the hook from coming off.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a view showing an embodiment of a seismic countermeasure fixing bracket according to the present invention, in which FIG. 1 (a) is a plan view and FIG.
[0013]
The seismic countermeasure fixing bracket of the present invention (hereinafter simply referred to as a fixing bracket) is free without processing the free access floor in a clean room or removing a part of the floor to open the floor. It has a feature that equipment such as a shelf can be easily fixed using a punching hole functionally provided on the access floor.
[0014]
As shown in FIG. 1, the structure of the fixing bracket is such that two holes are provided in the punching hole 2 of the free access floor 1 through long holes (loose holes 5) provided in the column base fixing plate 3 such as a shelf and the holding plate 4. The tip end portion of the U-shaped hook 6 is inserted, and each hook 6 is hooked in the punching hole 2 of the free access floor 1. Next, the bolt 7 is screwed into the screw hole of the presser plate 4 so that the presser plate 4 pulls up the hook 6. At the same time, the bolt 7 presses the column base fixing plate 3 against the free access floor 1 and fastens it. In this way, the column base 8 such as a shelf is firmly fixed to the free access floor 11.
[0015]
Here, a clean room using the fixture of the present invention will be described. In a clean room used for semiconductor manufacturing, air blown out from a high-performance filter installed in a ceiling portion is vertically downflowed and circulated under the floor in order to maintain a highly clean space. For this reason, the floor material which comprises the floor employ | adopts the free access floor with which the punching hole for air to pass through was opened. This free access floor is made of 600 mm × 600 mm aluminum die cast, and has a panel structure that can be easily removed for maintenance and inspection of electric wires and pipes laid under the floor. The diameter of the punching holes is generally 8 mm, and is arranged in a lattice pattern with a pitch distance of 15 mm between the centers. The thickness of the free access floor in the punching hole is 10 mm. The present invention intends to fix a shelf or the like to the free access floor using the punching holes of the free access floor.
[0016]
Next, each part which comprises the fixing metal fitting of this invention shown in FIG. 1 is demonstrated concretely. First, the column base fixing plate 3 for sandwiching the column base 8 such as a shelf and fixing it on the free access floor 1 is formed by bending a strip-shaped iron plate material, and one end side that contacts the column base 8 is lifted. The front end portion is formed in a bifurcated shape, and a pair of parallel long holes (loose holes 5) are formed in a plane portion in contact with the free access floor 1 on the other end side. It has been. The parallel interval between the two loose holes 5 is arbitrarily set to an integral multiple of the pitch interval, such as 15 mm or 30 mm, in accordance with the pitch interval of the punching holes 2. The width of the loose hole 5 is 8 mm, which is the same as the diameter of the punching hole 2, and the length is arbitrarily set to a length that can cover the plurality of punching holes 2 in one row.
[0017]
The holding plate 4 that moves up and down by the two bolts 7 is composed of a flat plate having two loose holes 5 having the same dimensions as the long holes provided in the column base fixing plate 3 described above. A screw hole for screwing 7 is formed. The presser plate 4 is provided with a screw hole and a loose hole 5 for screwing two bolts 7 at both ends, and is made of iron having a thickness in consideration of strength. Further, the holding plate 4 is in a free state until it is fixed to the free access floor 1 with the bolt 7 via the hook 6.
[0018]
Next, the hook 6 that passes through the loose hole 5 and hooks into the punching hole 2 will be described. The hook 6 is formed by bending a rod such as a round bar into a U-shape or a U-shape, and its tip is bent into a bowl shape. The structure of the tip is determined so that it can be inserted into the punching hole 2 having a diameter of 8 mm and a length of 10 mm in consideration of strength, and is made of iron.
[0019]
The loose hole 5 is provided in both the column base fixing plate 3 and the holding plate 4, and is intended to facilitate the insertion of the hook 6 by tilting the hook 6 when the tip of the hook 6 is inserted into the punching hole 2. At the same time, the hook 6 can be easily matched with the arrangement of the punching holes 2 of the free access floor 1.
[0020]
Next, the usage method of said fixing metal fitting is demonstrated using FIG. One end of the column base fixing plate 3 is placed on the column base 8 such as a shelf installed on the free access floor 1 in the clean room, and the holding plate 4 is loosened on the column base fixing plate 3. Overlapping by aligning the 5 positions. The direction of the loose holes 5 is matched with the arrangement direction of the punching holes 2. Next, two hooks 6 are inserted into the loose holes 5 across the two loose holes 5 of the superposed column base fixing plate 3 and the holding plate 4, and the tip ends of the hooks 6 are formed into the punching holes 2. Hook it in a saddle shape. Next, the presser plate 4 starts to rise by screwing the bolts 7 into the screw holes located at both ends of the presser plate 4 and outside the two hooks 6, and the presser plate 4 pulls up the hook 6 to raise the hook 6. Is fixed to the free access floor 1. At the same time, by fastening the bolt 7, the column base fixing plate 3 is pressed against the free access floor 1 at the lower end of the bolt 7, and the column base 8 is also pressed against the free access floor 1. Thus, when using the fixing bracket of the present invention, there is no need for processing or opening of the free access floor.
[0021]
Next, another embodiment of the present invention will be described with reference to the drawings. 2A and 2B are views showing another embodiment of the fixing bracket, in which FIG. 2A is a plan view, and FIG. 2B is a side view partially in section.
[0022]
As shown in FIG. 2, the present embodiment is characterized in that the number of bolts 7 screwed into the holding plate 4a is one. Along with this, the holding plate 4a has a screw hole at one central portion thereof, and at the same time, the loose hole is eliminated to reduce the width so that the two hooks 6 cannot be removed. . The hook 6 is positioned so as to straddle the width direction, and the tip is hooked in the punching hole 2. In order to prevent the hook 6 from coming off during tightening, the pressing plate 4a forms the convex edge portion 9 by raising both end portions upward. The parts structure other than the pressing plate is the same as that of the above-described embodiment. According to this embodiment, since only one bolt is required, the number of mounting steps can be reduced, and the fixing bracket itself can be reduced in size, so that the structure is suitable for relatively small and light equipment.
[0023]
In addition, as an application example, in the fixing bracket fastened with two bolts as shown in FIG. 1, as shown in the plan view of FIG. 3, the holding plate 4b is not provided with a loose hole and the width is narrowed. It is good. In addition, in the fixing fitting fastened with one bolt as shown in FIG. 2, a loose hole 5 may be provided in the pressing plate 4c to widen the width as shown in the plan view of FIG. In any case, it can be used properly depending on the layout in the clean room and the type of equipment.
[0024]
【The invention's effect】
By using the fixture of the present invention, it is possible to easily fix a shelf or the like without processing the free access floor in the clean room. Since the clean room for semiconductors is very disliked to generate dust, it is possible to maintain a highly clean indoor environment by eliminating on-site processing. In addition, since the fixing bracket of the present invention is attached using the punching holes of the free access floor, the attachment position can be easily changed, and the layout of the shelf and the like can be flexibly dealt with.
[0025]
Further, as compared with the conventional fixing means in which a hook is hooked and the hook itself is tightened with a nut as a bolt, the size of the bolt can be increased and the strength can be improved. In addition, the number of tightening points is small, and mounting is easy. On the other hand, in terms of safety, it is very dangerous to open the free access floor in a clean room that is in operation, so there is no need to open the free access floor. Can be significantly improved.
[Brief description of the drawings]
1A and 1B are diagrams showing an embodiment of the present invention, in which FIG. 1A is a plan view, and FIG.
2A and 2B are diagrams showing another embodiment of the present invention, in which FIG. 2A is a plan view, and FIG. 2B is a side view with a partial cross section.
FIG. 3 is a plan view showing an application example of the embodiment.
FIG. 4 is a plan view showing an application example of another embodiment.
FIG. 5 is a perspective view showing a conventional method for attaching a fixing bracket.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Free access floor 2 Punching hole 3 Column base fixing plate 4, 4a, 4b, 4c Holding plate 5 Loose hole 6 Hook 7 Bolt 8 Column base 9 Convex edge 10 Equipment 11 Free access floor 12 Support leg 13 Fixing bracket 14 Long bolt

Claims (11)

Free access to the column base of the equipment in an anti-seismic mounting bracket used when installing equipment on a floor in a clean room consisting of free access floors with punched holes arranged in a grid Through a column base fixing plate for pressing and fixing to the floor, a holding plate freely superimposed on the column base fixing plate, and a pair of parallel long holes formed in the column base fixing plate across the holding plate A U-shaped hook that has a tip bent in a bowl shape in the punching hole of the free access floor, hooks the tip , and a bolt that moves the press plate up and down by screwing into a screw hole provided in the press plate And rotate the bolt to raise the holding plate and pull up the hook. Click is entered by pressing a column base fixing plate to the raised floor in the lower end of the same time are locked into punched holes on the raised floor bolts, seismic countermeasure fixing member, characterized in that to fix the equipment. The seismic countermeasure fixing according to claim 1, wherein the center interval between the pair of parallel elongated holes provided in the column base fixing plate is an integral multiple of the pitch interval of the punching holes formed in the free access floor. Hardware. 2. The seismic countermeasure fixture according to claim 1, wherein each of the pair of parallel long holes provided in the column base fixing plate includes a plurality of punching holes in one row. The U-shaped center spacing of the U-shaped portion of the hook, seismic countermeasure fixing bracket according to claim 1, wherein an integer multiple of the pitch spacing of the punching hole drilled in the raised floor. The two hooks are used and straddle the holding plate at two places. The holding plate is provided with screw holes for screwing bolts at both ends, and the bolts are screwed and tightened outside the two hooks. The metal fitting for earthquake resistance measures according to claim 1. 6. The presser plate is provided with a pair of parallel elongated holes having the same shape as that provided in the column base fixing plate, and the hook extends over the presser plate through the elongated holes. Fixing bracket for earthquake resistance. 6. The seismic-resistant fixing bracket according to claim 5, wherein the pressing plate is a single plate that does not have a long hole, and the hook extends in the width direction of the single plate. Two hooks are used and straddle the holding plate at two locations. The holding plate is provided with a screw hole for fastening the bolt at one intermediate portion, and the bolt is fastened between the two hooks. The fixing bracket for earthquake resistance according to claim 1. 9. The presser plate according to claim 8, wherein a pair of parallel long holes having the same shape as that provided in the column base fixing plate are formed in the presser plate, and the hook extends over the presser plate through the long hole. Fixing bracket for earthquake resistance. 9. The seismic anti-vibration fixing bracket according to claim 8, wherein the pressing plate is a single plate that does not have a long hole, and the hook extends in the width direction of the single plate. Wherein the pressing plate having a threaded hole for fastening the bolt in one position of the intermediate portion of the pressing plate, according to claim 8, wherein the convex edges to prevent disengagement of the hook is provided at both ends thereof Fixing bracket for earthquake resistance.

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