JP2004190345A - Fixing bracket for earthquake resistant measure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To mount a fixing bracket by using a punched hole of a free-access floor when equipment is to be installed in a clean room. <P>SOLUTION: This fixing bracket is equipped with a column base fixing plate 3 for fixing a column base part 8 of the equipment by pressing it against the free-access floor 1, a holding plate 4 which is freely placed on the plate 3, U-shaped hooks 6 which make hook-shaped tip parts hooked into the punched holes 2 through a pair of parallel loose holes 5, which are drilled in the plate 3, in such a manner as to straddle the holding plate 4, and bolts 7 which are screwed into the screw holes of the holding plate 4 so as to make the holding plate 4 go up and down. The rotation of the bolts 7 makes the holding plate 4 ascend so as to pull up the hooks 6, and the hooks 6 are locked to the punched holes 2 of the floor 1. Concurrently with that, the plate 3 is fastened by being pressed against the floor 1 by lower ends of the bolts 7, so that the equipment can be fixed. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a fixing bracket for fixing a column base of equipment to a free access floor constituting a floor when the equipment is installed on a floor in a clean room. Highly-reliable fixing brackets for earthquake resistance
[0002]
[Prior art]
Conventionally, for example, in a clean room for semiconductor manufacturing, a square aluminum plate having a perforated hole called a free access floor is generally used as a floor material, and a plurality of such plates are arranged to form a floor. I have. This floor structure has a punching hole so that the airflow in the clean room can be dropped below the floor, and can be easily removed for maintenance and inspection of wires and pipes laid below the floor. Usually, the punching hole having a diameter of 8 to 12 mm is used, but the latest clean room uses a hole having a diameter of 8 mm in order to suppress the vibration generated when a carriage or the like moves.
[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, conventionally, as shown in the perspective view of FIG. 5, the free access floor 11 is subjected to processing such as drilling, the free access floor 11 is partially removed to open the floor, and the free access floor provided thereunder is provided. 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 through a hole formed in the free access floor 11 via the fixing bracket 13 (see, for example, the cited document). 1).
[0004]
However, equipment such as shelves frequently moves its installation position due to a layout change in a clean room or the like, and it is necessary to process a free access floor and attach a fixing bracket each time. Further, there is a problem that the processing operation is a dust generation operation in a clean room, and pollutes the environment in the clean room. On the other hand, under the floor of the clean room, a height of 2 to 3 m is required due to its function, and the work of opening the free access floor is very dangerous.
[0005]
Therefore, in order to solve the above-mentioned problem, there has been a demand for a fixture capable of fixing facility equipment without processing or opening the free access floor. For this purpose, a metal fitting that uses a lock bolt with a hook at one end, hooks the hook into a punching hole on the free access floor, and fastens the other end with a nut to fix the equipment via the lock plate is proposed. (For example, refer to Reference Document 2). However, since this fixing bracket is provided with a screw on the lock bolt, it may be damaged from the screw part when a large external force is applied, and it is not reliable for seismic measures because it does not have the required strength. There was a problem.
[0006]
[Patent Document 1]
Japanese Patent Publication No. 06-047864 (FIG. 1)
[Patent Document 2]
Japanese Utility Model Publication 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 using a perforated hole in the free access floor to attach the fixing bracket without performing on-site processing on the free access floor, the inside of the clean room is improved. It is an object of the present invention to provide a metal fitting having excellent seismic strength, which eliminates dust generation, improves construction safety, and can flexibly cope with frequent layout changes of equipment.
[0008]
[Means for Solving the Problems]
The present invention relates to a 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, wherein the pillar base of the equipment is provided. Pedestal fixing plate for pressing and fixing the part to the free access floor, a pressing plate freely overlapped on the pedestal fixing plate, and a pair of parallel plates opened over the pedestal fixing plate straddling the pressing plate. A U-shaped hook for hooking a hook-shaped tip at a punching hole of a free access floor through a long hole, and a bolt for screwing a screw hole provided in the holding plate to move the holding plate up and down. By rotating, the holding plate is raised and the hook is pulled up. Once locked in punching holes in the floor bolt pedestal fixing plate at the lower end of the simultaneously entered against the raised floor, so that it is possible to fix the equipment.
[0009]
Further, in the present invention, the center interval between a pair of parallel long holes provided in the column base fixing plate is an integral multiple of the pitch interval of punching holes formed in the free access floor, and the column base fixing plate has The length of the pair of parallel long holes provided is a length including a plurality of punching holes in one row, and the center interval of the U-shaped hooks is the same as the length of the punching holes formed on the free access floor. It is set to be an integral multiple of the pitch interval.
[0010]
In the present invention, two hooks are used to straddle the holding plate at two places, and the holding plate is provided with screw holes at both ends for screwing bolts, and the bolts are screwed in outside the two hooks for fastening. The holding plate is provided with a pair of parallel long holes having the same shape as that provided on the column fixing plate, and the hooks extend over the holding plate through the long holes, or The holding plate is a single plate having no long hole, and the hook is arranged to extend in the width direction of the single plate.
[0011]
In the present invention, two hooks are used to straddle the holding plate at two places, and the holding plate is provided with a screw hole for fastening a bolt at one place at an intermediate portion, and a bolt is provided between the two hooks. The holding plate is provided with a pair of parallel long holes having the same shape as that provided on the column base fixing plate, and the hooks extend over the holding plate through the long holes. Alternatively, the holding plate is a single plate having no long hole, and the hook is arranged to extend in the width direction of the single plate. Further, when a screw hole for fastening a bolt is provided at one position in the middle of the holding plate, a convex edge is provided at both ends of the holding plate to prevent the hook from coming off.
[0012]
BEST MODE FOR CARRYING OUT 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 fixture for seismic measures in the present invention. FIG. 1 (a) is a plan view, and FIG. 1 (b) is a side view in partial cross section.
[0013]
The fixture for seismic measures of the present invention (hereinafter simply referred to as a fixture) can be used in a clean room without processing the free access floor or removing a part of the floor to open the floor. There is a feature that facility equipment such as shelves can be easily fixed by using punching holes provided functionally on the access floor.
[0014]
As shown in FIG. 1, the structure of the fixing bracket is such that two holes (loose holes 5) provided in a column base fixing plate 3 such as a shelf and a holding plate 4 are formed in a punching hole 2 of a free access floor 1. The tip of the U-shaped hook 6 is inserted, and each hook 6 is hooked on the punching hole 2 of the free access floor 1. Next, the bolt 7 is screwed into the screw hole of the holding plate 4 so that the holding plate 4 pulls up the hook 6, and at the same time, the bolt 7 holds the column base fixing plate 3 against the free access floor 1 and fastens the same. In this manner, 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 from a high-performance filter installed on a ceiling is vertically down-flowed and circulated under the floor in order to maintain a high-purity space. For this reason, the floor material constituting the floor employs a free access floor having a perforated hole through which air passes. This free access floor is made of aluminum die cast of 600 mm × 600 mm and has a panel structure that can be easily removed for maintenance and inspection of wires and pipes laid under the floor. The diameter of the punching holes is generally 8 mm, and the holes are arranged in a grid at a pitch of 15 mm between centers. The thickness of the free access floor at the punched hole is 10 mm. The present invention intends to fix a shelf or the like to the free access floor by using the punching holes of the free access floor.
[0016]
Next, each component constituting the fixing bracket of the present invention shown in FIG. 1 will be specifically described. First, a column base fixing plate 3 for fixing the column base 8 such as a shelf on the free access floor 1 is formed by bending a band-shaped iron plate material, and one end side in contact with the column base 8 is lifted. And the front end portion is formed in a forked shape, and a pair of parallel long holes (loose holes 5) are formed in a flat portion at the other end in contact with the free access floor 1. Have been. The parallel interval between the two loose holes 5 is arbitrarily set to an integral multiple of the pitch interval, for example, 15 mm, 30 mm, or the like, in accordance with the pitch interval between the punching holes 2. The width of the loose hole 5 is set to 8 mm, which is the same as the diameter of the punched hole 2, and the length is arbitrarily set so as to cover the plurality of punched holes 2 in one row.
[0017]
The holding plate 4 which is moved up and down by the two bolts 7 is constituted by a flat plate having two loose holes 5 having the same dimensions as the elongated holes provided in the column base fixing plate 3 described above. A screw hole for screwing 7 is formed. Since the holding plate 4 is provided with a screw hole and a loose hole 5 for screwing two bolts 7 at both ends, it is made of iron having a thickness in consideration of strength. The holding plate 4 is in a free state until it is fixed to the free access floor 1 with the bolts 7 via the hooks 6.
[0018]
Next, the hook 6 that passes through the loose hole 5 and hooks on the punching hole 2 will be described. The hook 6 is formed by bending a bar material such as a round bar into a U-shape or a U-shape, and its tip is bent into a hook shape. The structure of the distal end is determined in consideration of strength so that the diameter and the length are determined so that it can be inserted into the punching hole 2 having a diameter of 8 mm and a length of 10 mm while being inclined, and the material is iron.
[0019]
The above loose holes 5 are provided in both the column base fixing plate 3 and the holding plate 4, and are for facilitating the insertion of the hook 6 by inserting the tip of the hook 6 into the punching hole 2. At the same time, the hook 6 can be easily adjusted to the arrangement of the punching holes 2 on the free access floor 1.
[0020]
Next, a method of using the above-mentioned fixing bracket will be described with reference to FIG. One end of the column base fixing plate 3 is placed on a column base 8 such as a shelf installed on the free access floor 1 in the clean room, and the holding plate 4 is placed on the column base fixing plate 3 with a loose hole. Position 5 and overlap. The direction of the loose holes 5 coincides with the arrangement direction of the punching holes 2. Next, two hooks 6 are inserted into the loose holes 5 across the two base holes fixing plate 3 and the two loose holes 5 of the holding plate 4, and the tips of the hooks 6 are inserted into the punching holes 2. And hook it with a hook. Next, the holding plate 4 starts to rise by screwing bolts 7 into the screw holes located at both ends of the holding plate 4 and outside the two hooks 6, and the holding plate 4 raises the hook 6 by pulling up the hook 6. Are fixed to the free access floor 1. At the same time, the column base fixing plate 3 is pressed against the free access floor 1 at the lower end of the bolt 7 by fastening the bolt 7, and the column base 8 is also pressed against the free access floor 1. As described above, the use of the fixture of the present invention does not require any processing or opening work on 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 in partial cross section.
[0022]
As shown in FIG. 2, this embodiment is characterized in that the number of bolts 7 screwed into the holding plate 4a is reduced to one. Along with this, the holding plate 4a has the screw hole at one central position, and at the same time eliminates the loose hole to reduce the width and shorten the length so that the two hooks 6 do not come off. . The hook 6 is positioned so as to straddle in the width direction, and the tip portion is hooked on the punching hole 2. Then, in order to prevent the hook 6 from coming off when tightened, the holding plate 4a has raised edges 9 with both ends raised upward. The structure of the parts other than the holding plate is the same as that of the first embodiment. According to the present embodiment, since only one bolt is required, the number of mounting steps can be reduced, and the fixture itself can be reduced in size, so that the structure is suitable for relatively small and lightweight equipment.
[0023]
In addition, as an application example, in a fixing bracket fastened with two bolts as shown in FIG. 1, as shown in a plan view of FIG. 3, a structure in which a width is reduced without providing a loose hole in a holding plate 4b. It may be. Further, in the fixing bracket fastened with one bolt as shown in FIG. 2, a structure in which a loose hole 5 is provided in the holding plate 4c to widen the width as shown in the plan view of FIG. 4 may be adopted. 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, shelves and the like can be easily fixed without processing a free access floor in a clean room. Since the clean room for semiconductors is very reluctant to generate dust, it is possible to maintain a high cleanness indoor environment by eliminating on-site processing. In addition, since the fixture of the present invention is attached using the punched holes on the free access floor, the attachment position can be easily changed, and the layout of a shelf or the like can be flexibly changed.
[0025]
Further, the size of the bolt can be made larger and reliability in terms of strength can be increased as compared with a fixing means in which a hook is hooked and the hook itself is bolted and tightened with a nut as in the conventional case. In addition, the number of fastening points is small, and mounting is easy. On the other hand, from the viewpoint of safety, it is extremely dangerous to open the free access floor in a running clean room, so there is no need to open the free access floor. Can be significantly improved.
[Brief description of the drawings]
FIG. 1 is a view showing one embodiment of the present invention, in which FIG. 1 (a) is a plan view and FIG. 1 (b) is a side view in partial cross section.
FIG. 2 is a view showing another embodiment of the present invention, wherein FIG. 2 (a) is a plan view and FIG. 2 (b) is a side view partially cut away.
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 of attaching a fixing bracket.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 Free access floor 2 Punching hole 3 Pillar fixing plate 4, 4 a, 4 b, 4 c Holding plate 5 Loose hole 6 Hook 7 Bolt 8 Pillar 9 Convex edge 10 Equipment 11 Free access floor 12 Support leg 13 Fixing bracket 14 Long bolt

Claims (11)

In the seismic fixing bracket used when installing equipment on the floor in a clean room composed of free access floors with punching holes arranged in a grid pattern, the column base of the equipment is free-accessed. A pedestal fixing plate for pressing and fixing to the floor, a holding plate freely overlapped on the pedestal fixing plate, and a pair of parallel long holes opened in the pedestal fixing plate straddling the holding plate. A U-shaped hook for hooking a hook at the tip to a punching hole of the free access floor, and a bolt for raising and lowering the holding plate by screwing into a screw hole provided in the holding plate, and rotating the bolt Raise the holding plate and raise the hook, and the hook The column base fixing plate at the lower end of the locked are simultaneously bolts Nchingu hole fastened against the raised floor, seismic countermeasure fixing member, characterized in that to fix the equipment. 2. The fixing device according to claim 1, wherein a center interval between the pair of parallel elongated holes provided in the column base fixing plate is an integral multiple of a pitch interval between punching holes formed in the free access floor. Metal fittings. 2. The fixture according to claim 1, wherein the length of the pair of parallel long holes provided in the column base fixing plate is a length including a plurality of punching holes in one row. The fixture according to claim 1, wherein a center interval of the U-shaped hooks is an integral multiple of a pitch interval of punching holes formed in the free access floor. The two hooks use two hooks and straddle the holding plate at two places, and the holding plate is provided with screw holes for screwing bolts at both ends, and the bolts are screwed and fastened outside the two hooks. The fixture according to claim 1. 6. The holding plate according to claim 5, wherein a pair of parallel long holes having the same shape as that provided in the column base fixing plate are formed in the holding plate, and the hooks extend over the holding plate through the long holes. Fixing bracket for earthquake resistance. 6. The fixture according to claim 5, wherein the holding plate is a single plate having no long hole, and the hooks extend in a width direction of the single plate. The two hooks are used to straddle the holding plate at two places, and the holding plate is provided with a screw hole for fastening a bolt at one place at an intermediate portion, and the bolt is fastened between the two hooks. The fixing bracket for earthquake-resistant measures according to claim 1. 9. The holding 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 holding plate, and the hooks extend over the holding plate through the long holes. Fixing bracket for earthquake resistance. 9. The fixing bracket according to claim 8, wherein the holding plate is a single plate having no long hole, and the hooks extend in a width direction of the single plate. 9. A holding plate having a screw hole for fastening a bolt at one position of an intermediate portion of the holding plate, and a convex edge portion for preventing a hook from coming off is provided at both ends of the holding plate. Fixing bracket for anti-seismic measures described.

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