JPH0634094A - Electronic cabinet installing method and fixing structure - Google Patents

Abstract

PURPOSE:To eliminate flatness measurement in advance by leveling the seatings on the floor, which correspond to the two, right and left, setting and installing positions of a cabinet and installing and fixing other installing and fixing positions on the floor without clearance after supporting the cabinet on these seatings. CONSTITUTION:In order to install and fix a cabinet 9, first of all, the seatings 81 to 84 on the floor, which correspond to setting and fixing positions 91 to 94 of both the right and left ends of the cabinet 9, for example, respectively, are leveled. In the next step, the cabinet 9 is installed on the seatings 81 to 84 and is fixed to and supported by only the setting and installing positions 91 to 94. Then, according to the deflection of the cabinet 9 due to supporting and fixing, other setting and fixing positions 71 to 74 are installed and fixed on the floor without clearance. Or, other seatings 85 and 86 on the floor, which correspond to setting and fixing positions 95 and 96 of two positions in the center part of the cabinet 9, for example, respectively, are leveled and also fixed. While confirming the prependicularity of the cabinet 9, the other setting and installing positions 75 to 78 are installed and fixed on the floor without clearance according to the deflection of the cabinet 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of installing an electronic device housing and a structure for fixing the electronic device housing, in which a housing of a large electronic device having a plurality of installation and fixing points at the bottom is installed on a floor surface having irregularities. Regarding

Recent electronic devices have been made smaller and lighter, and high density packaging has been advanced, and it can be seen that devices constituting a system tend to be large-sized. On the other hand, the mainstream mounting structure is plug-in connection mounting, and a multi-terminal small-sized high-density connector is used, and more and more precision is required for fitting, and high precision is required structurally.

In an electronic device having a system configuration that is composed of a large-sized housing mounted in high density, a large number of housings are arranged and installed on the same floor surface. This floor surface is required to have a flat surface with unevenness within the specified value so that the housing can be erected vertically, but it is difficult and expensive for construction, and the installation location is limited, so additional addition or There is a problem that the degree of freedom of change is lost,
It is required that it can be installed on a floor that allows unevenness.

[0004]

2. Description of the Related Art FIG. 5 shows a conventional example, (a) is a housing installation and fixing state, (b) is an enlarged view of installation and fixing structure, and FIG. 6 is another conventional example of housing installation and fixing state. .

In order to be able to install the apparatus housing on a floor surface that allows unevenness, it is necessary to absorb the distance between the floor surface and the floor surface, which is not aligned at the installation and fixing point, without any gap.
In the conventional example, as shown in FIG. 5 (a), in order to fix each installation fixing point 99 at the bottom of the housing 9 to the floor surface without a gap, a fixing as shown in FIG. 5 (b) is performed. It has a structure.

In this fixing structure, as shown in the side cross section in the drawing, a bent iron pedestal 89 is projected at the installation fixing point 99 of the housing 9, and an insulating plate 49 and a gap are provided between this and the floor. Insulation bush 48 with washer, stacking a predetermined number of liners 59 of various thicknesses for filling
The fixing bolt 29 that has passed through is passed through the whole and screwed into a screw hole formed on the floor surface, and is integrally fixed and fixed.

At this time, the thickness of the liner 59 needs to be measured and prepared before the housing 9 is placed so that the liner 59 has the same horizontal plane at all corresponding positions of the fixed installation points 99.

The housing 9 is fixed by an insulating plate 49 and an insulating bush 48 so as to be electrically insulated from the floor surface and the fixing bolts 29, and a housing for a disturbing current flowing through structural members due to a lightning strike on a building. Prevents straying to body 9.

As another conventional example, as shown in FIG. 6, a pedestal 69 having a flat installation surface is first installed horizontally on the floor surface, and the housing 9 is installed and fixed on it. The housing 9 may be installed directly without any level adjustment, but the pedestal 69 is fixed in a horizontal state by adjusting the level with the floor surface at each installation fixing point 98.

[0010]

However, the work of measuring the unevenness of the floor surface to be installed and fixed in advance and inserting the liner 59 to eliminate the gap must be performed for all the installation and fixing positions. The more accurately the required installation flatness is required, the more sophisticated the measuring method and the longer the time. Moreover, it is necessary to prepare a large number of liners 59 of each thickness depending on the maximum unevenness difference size of the floor surface and the required installation flatness size. In addition, the number actually used is small and wasteful. For this reason, providing the adjustable foot or pedestal whose height can be adjusted for each installation location increases the size of the apparatus housing itself and increases the cost. However, when the housing 9 is directly installed and fixed on the uneven floor surface without adjusting the level, since the housing 9 is not generally a rigid body, the unevenness of the floor surface causes distortion, which causes plug-in connection. There is a problem because it interferes with the opening and closing of the door. Also, as shown in FIG. 6, when using the mount 69,
69 must be a rigid body so as not to be deformed by the installation load of the housing 9, but this makes it bulky and heavy, and is practically limited in use. There are problems such as.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a method of installing and fixing by a simple level adjusting structure which replaces the stacking of liners by reducing the flatness measurement in advance.

[0012]

The above-described object is to achieve the above-mentioned objects with reference to FIGS.
As shown in [1], [1] is a method of installing a housing of a large-sized electronic device having a plurality of installation fixing points on the bottom on an uneven floor surface. Levels of the pedestals 81 to 84 on the floor corresponding to the two fixed installation points 91 to 94 are set horizontally, and the housing 9 is installed on the pedestals 81 to 84. Only the fixed installation points 91 to 94 at both ends are installed. This is achieved by the method of supporting both ends of the electronic device casing according to the present invention, in which the other fixed installation points 71 to 74 are fixed to the floor surface without gaps according to the bending of the casing 9 caused thereby. To be done. [2] First, level the pedestals 85 and 86 on the floor corresponding to the fixed installation points 95 and 96 at the two central locations that divide the housing 9 into two parts, and place the housing 9 on the pedestals 85 and 86. Installed and fixed location
Only the 95 and 96 are supported and fixed, and while confirming the verticality of the housing 9, the other fixed installation points 75 to 78 are fixed to the floor surface without any gap in accordance with the bending of the housing 9 caused by this. The present invention is suitable for the center support installation method of the electronic device housing of the present invention. [3] Further, the pedestal 6 having a flat mounting surface and fixed by absorbing the unevenness of the floor surface by the fixing leg portions 66 is fixed to the floor surface.
This can also be achieved by the method of mounting the electronic device casing on the mounting surface of the present invention, in which the casing 9 is fixedly installed. [4] Here, a specific level-adjustable fixing structure for installing and fixing the housing on a floor surface having unevenness is provided by projecting downward at a lower installation fixing portion of the housing 9 and fixing the surface parallel to the floor surface. 11, an L-shaped bent iron 1, a stud bolt 2 or a screwed bolt 22 that is vertically installed on the floor surface, nuts A31 and B32 that are screwed into the stud bolt 2, or a nut B32 that is screwed into the screwed bolt 22. The stud bolt 2 or the threaded bolt 22 is made up of an insulating tube 4 and two insulating seat plates 44. The stud bolt 2 has a nut B32 and an insulating seat plate 4 in order from the bottom.
4. Insulating pipe 4, L-shaped bent iron 1 fixing surface 11, insulating seat plate 44, nut A31 is passed through, nut B32 is screwed up from below, L-shaped bent iron 1 fixing surface 11 lower surface is an insulating seat plate After tightly attaching 44, the nut A31 is screwed down and fixed through the insulating seat plate 44 on the upper side, and the nut B is attached to the screw-in bolt 22 from below.
32, insulating seat plate 44, insulating pipe 4, fixing surface 11 of L-shaped bent iron 1, insulating seat plate 44, bolt head 23, and screwed bolts from the top.
22 is screwed in, the bolt head 23 is brought into close contact with the upper insulating seat plate 44 that is brought into close contact with the upper surface of the fixed surface 11 of the L-shaped bent iron 1, and then the nut B
The electronic device of the present invention, in which 32 is fastened and fixed via an insulating seat plate 44 under screwing up, the case 9 is electrically insulated from the floor surface, the level is adjusted to an arbitrary height position, and installed and fixed. This is achieved by the first installation and fixing structure of the housing. [5] Furthermore, the fixing structure is a screw bolt that hangs vertically on the floor surface.
Insulation pipe 4 that passes through stud bolt 2 into which 22 or nut A31 is screwed, and stud bolt 2 or screw-in bolt 22
And two insulating seat plates 44, and a pedestal 8 in which the level adjusting seat 5 is movably screwed in the center. The stud bolt 2 or the screwed bolt 22 is attached to the pedestal 8, the insulating seat plate from the bottom. 44, insulating tube 4, fixed surface 11 of L-shaped bent iron 1, insulating seat plate 44,
The nut A31 or the bolt head 23 is passed through in this order, the level adjusting seat 5 is screwed up, the lower insulating seat plate 44 is brought into close contact with the lower surface of the fixed surface 11 of the L-shaped bent iron 1, and then the nut A31 or the screw bolt 22 is attached. An electronic device casing of the present invention, which is fixed by fastening via an insulating seat plate 44 on a screw down, electrically insulates the casing 9 from the floor surface, and is installed and fixed by adjusting the level at an arbitrary height position. This is achieved by the second fixed installation structure.

[0013]

That is, as shown in the principle explanatory views of (a) and (b) of FIG.
By supporting the center, it is only necessary to adjust the level at the corresponding position on the floor surface, which is much easier than adjusting all the fixed points on the same plane, and in the case of both-end support, four points are also required. 2 on the same end without being aligned on the same horizontal plane
It is much easier to carry out, as you only have to adjust the level of each part horizontally.

Next, if the housing 9 is installed and fixed to the both ends or the central support, the bending naturally occurs, but it can be estimated from the structural analysis and the experiment in advance for each device. As long as the structural strength of the housing 9 is designed so that the value of the flexure at each part is within the allowable value, there is no problem even if it flexes, and there is no hindrance.

Therefore, the housing 9 having such a structural strength is used, and the other fixed fixing points 71 to 78 are fixed by adjusting the level at that position according to the state of being bent. do it. At this time, even if it is fixed so as to be lifted a little, it does not cause any trouble because it acts in the direction in which the bending is reduced. However, it is important not to fix it so as to increase the deflection by lowering it even a little.

The first installation fixing points 91 to 96 of the housing 9 may be directly fixed to the floor surface whose level is adjusted by a liner or the like. However, the other installation and fixing points 71 to 78 require a fixing structure whose level can be adjusted so as to close the gap with the floor surface.

This first level-adjustable fixed installation structure is as shown in FIG. 2, in which the fixed surface 11 of the L-shaped bent iron 1 is received by the nut B32 via the insulating seat plate 44, and the stud bolt 2 or screw-in is performed. It is fixed to the floor with bolts 22. At this time, the level can be arbitrarily and continuously adjusted by turning the nut B32. Also, it can be extremely easily adjusted to be slightly lifted.

Similarly, the second installation fixing structure is as shown in FIG. 3, and unlike the above, instead of the nut B32,
The housing 9 is received by a pedestal 8 in which the level adjusting seat 5 is screwed in the center, and the level adjustment can be continuously performed by turning the level adjusting seat 5, and the stud bolt 2 or the nut A31 is used. This is integrally fixed to the floor surface with the screw bolt 22. It can withstand a larger load than the first one.

As yet another installation and fixing method, FIG. 4 (a)
There is a mounting method shown in Fig. 4, and the mounting base 6 is a rigid mounting base having a flat mounting surface, and the level-fixable fixing leg portions 66 are fixed according to the unevenness of the floor surface, so that the mounting surface flatness is fixed. Is not affected, and the housing 9 can be directly fixed to it.

The level-adjustable fixed leg portion 66 may have the structure shown in FIGS. 2 and 3 described above, but FIG.
As shown in the figure, the leg fittings 64 are temporarily fixed in a movable state to the gantry body 61 through the fixing screws 63 in the slit holes 65, and the length of the slit holes 65 in the vertical direction is within the level variable range. After fixing it with the screw bolt 22,
By tightening 63, the leg fitting 64 is level-adjusted to an arbitrary height and fixed.

Thus, according to the present invention, it is possible to reduce the prior flatness measurement, and to provide the installation fixing method and the structure by a simple level adjusting structure which replaces the lamination of the liner.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in the drawings. Throughout the drawings, the same reference numerals denote the same objects. FIG. 2 shows a first installation and fixing structure of the present invention, (a) fixing stud bolts, (b) fixing screwed bolts, and FIG.
Is a second installation fixing structure of the present invention, (a) is a stud bolt fixing, (b) is a screwing bolt fixing, FIG. 4 is another installation fixing method of the present invention, (a) is a gantry installation, (b) is an enlarged view of the fixed leg.

In this embodiment, various prototypes were applied to a large electronic device having a width of 300 × a depth of 60 × a height of 180 cm, which constitutes a communication system installed in a station building. One embodiment is based on the installation and fixing method of supporting both ends shown in FIG. 1 (a), and adopts the installation and fixing structure shown in FIG. 2 (a).

This installation fixing structure is an L-shaped bent iron 1 having a fixing surface 11 parallel to the floor surface at all installation fixing points under the housing 9.
Is projected downward, and nut B is attached to the floor of the corresponding position.
A stud bolt 2 into which 32 is screwed is vertically installed, and an insulating seat plate 44 and an insulating pipe 4 are passed through the insulating surface upward, and the fixing surface 11 of the housing 9 is placed on the insulating seat plate 44 and the insulating tube 4, and the insulating surface is placed on the insulating seat plate 44. Place the insulating seat plate 44 with the insulating surface facing downward, and screw in the nut A31 to secure the fixed surface.
Tighten 11 between nuts A31 and B32.

At this time, in the lower part of the casing 9, four positions each in the front and rear,
There are a total of 8 fixed installation points, the left front end is the fixed installation point 91, the rear end is the same position 92, the right end is the same position 93, the same position is the same position 94, and the middle side is the same as 71-74. The nuts B32 of the stud bolts 2 on the floor corresponding to the installation fixing points 71 to 74 are lowered to the lowest position, and the nuts B32 of the stud bolts 2 on the floor of the installation fixing points 91,92 and 93,94 at both ends have substantially the same height. Further, the pedestals 81 to 84 are configured, the housing 9 is placed on the pedestals 81 to 84, and the fixing surface 11 is freed on the inner side. In addition, fixed installation points 91 and 92,
And the level B is applied to the portion of the housing 9 so that the installation fixing points 93 and 94 are respectively horizontal, and the nut B32 of the installation fixing points 91 and 93 is gently turned to adjust. When completed, turn the nut A31 to tighten and fix the four parts.

Next, at the installation and fixing points 71 to 74 on the inner side, the nuts B32 are respectively raised to bring the lower insulating seat plate 44 into close contact with the fixing surface 11, and lift so that a slight load is applied in the same manner. Then, the nut A31 is tightened down and fixed by tightening to complete the installation.

As a result, the apparatus casing 9 is visually fixed to a state in which it is slightly tilted to the left and right and is bent in a slack manner, but in this state, there is no problem in internal mounting and there is no problem. There is none.

However, when the housings 9 are arranged adjacent to each other in a row, it is additionally checked at the time of the first adjustment that the installation fixing points 91 and 93 are horizontal or that the housing 9 is vertical. There is a need.

Another embodiment is shown in FIG. 1 (b) above.
It is a method of installation and fixing by central support, and adopts the installation and fixing structure shown in Fig. 3 (b). In this installation fixing structure, an L-shaped bent iron 1 having a fixing surface 11 parallel to the floor is projected downward at all the installation fixing points in the lower part of the housing 9, and the floor surface at the corresponding position is A pedestal 8 having a level adjusting seat 5 screwed in at the center is placed, an insulating seat plate 44 with an insulating surface facing upward and an insulating tube 4 at the center thereof are placed on the pedestal 8, and a fixed surface 11 of the housing 9 is placed thereon. Place the insulating seat plate 44 with the insulating surface facing down on it, insert the screw bolt 22 in the center, screw the tip into the floor surface, and fix the fixed surface 11 to the level adjustment seat 5 and the bolt head. Tighten and fix between 23.

At this time, the lower part of the casing 9 is provided with five places, a total of six places, fixed places 95, 96, 75 to 78 corresponding to the front and rear, and two places in the front and rear of the center which divide the casing 9 into two. Fixed point
The level between the pedestals 85 and 86 on the floor corresponding to 95 and 96 is adjusted horizontally. For this adjustment, the level adjusting seat 5 is set to a predetermined substantially same height, the level adjusting seats 5 of the other installation fixing points 75 to 78 are lowered to the lowest level, and the housing 9 is placed on the installation fixing point 95. , 96 pedestals 85 and 86 are supported only at two points, and a level is applied to the housing 9 so that the front and back positions of the pedestals are horizontal, and the level adjustment seat 5 at the fixed installation point 95 is gently turned. adjust. After the adjustment is completed, the bolts 22 are screwed in and fixed.

Next, while confirming the verticality of the casing 9, the level adjusting seats 5 of the other installation fixing points 75 to 78 are gently turned to bring the lower insulating seat plate 44 into close contact with the fixing surface 11. After lifting so that a slight load is applied in the substantially same manner, the screw-in bolts 22 are tightened and fixed by tightening to complete the installation.

As a result, the apparatus housing 9 is fixed in a state where the apparatus housing 9 is visually tilted to the left and right, and both ends are slackened and bent. However, in this state, there is no problem in internal mounting and there is no problem. There is none.

However, when the casings 9 are arranged adjacent to each other in a row, the verticality of the casing 9 should be added while the other installation fixing points 75 to 78 are fastened and fixed. There is a need to do. In all of the above, the pedestal whose level can be adjusted with respect to all the installation and fixing points is used, but the pedestal part that is first supported and fixed may be a fixed pedestal and the level may be adjusted by a liner. The number of adjustment points is reduced and the adjustment is simple, so that the purpose can be adequately satisfied.

Still another installation method is to use the mount shown in FIG. 4 (a), which has fixed leg portions 66 with variable levels at the front and rear edges, has a flat mounting surface, and has a frame. Stand body 61 that is made of wood and plate material to achieve weight reduction and appropriate rigidity
The fixed leg portion 66 is adjusted and fixed according to the unevenness of the floor surface, and the housing 9 is directly fixed to the mounting surface having flatness without level adjustment.

The level-adjustable fixed leg portion 66 is shown in FIG.
As shown in (b), screw one end of the leg fitting 64 to the floor and
It is fastened and fixed with, and one side is fastened and fixed with a fixing screw 63 to a side surface fixing point of the gantry body 61.At this time, the fixing screw 63 is passed through the slit hole 65 opened vertically and It is possible to change the vertical level within the range.

Of course, when the mounting surface of the gantry 6 is horizontal, the pedestal body 61 is placed on the floor surface with the fixed legs 66 all free, and the level is placed on the mounting surface, and the descending slope is set. Place the liner in the gap between the floor and the bottom of the edge, and lift up and adjust little by little to make the mounting surface horizontal, and then fix each fixed leg 66 to the floor in that state. Then let the fixing screw
This is completed by fastening 63 and fixing the gantry body 61.

The above-mentioned embodiments are merely examples, and the shape of each part is not limited to the above. The fixed leg portion 66 of the pedestal 6 may have a level-adjustable fixing structure as shown in FIGS. 2 and 3.

[0038]

As described above, according to the fixing method of the present invention in which the apparatus casing is allowed to bend and is installed, it is possible to significantly reduce the flatness measurement of the installation floor surface in advance, and further, to laminate the liner. Instead, by using the installation fixing structure of the present invention for simple level adjustment which can be continuously varied by the screw seat, the installation operation becomes simple and easy, and the obtained effect is great.

[Brief description of drawings]

FIG. 1 is an explanatory view of the principle of the present invention. (A) In case of both ends support (b) In case of center support

FIG. 2 is a first installation and fixing structure of the present invention (a) stud bolt fixing (b) screw-in bolt fixing

FIG. 3 is a second installation fixing structure of the present invention (a) fixing stud bolts (b) fixing screwed bolts

FIG. 4 is another installation and fixing method of the present invention.

[Fig. 5] Conventional example (a) Enclosure installation fixed state (b) Installation fixation structure enlarged view

FIG. 6 is a state in which the housing is fixed in another example of the related art.

[Explanation of symbols]

1 L-shaped bent iron 2 Stud bolt 4
Insulation tube 5 Level adjustment seat 6,69 Stand 8,
81 to 86,89 Pedestal 9 Housing 11 Fixed surface 22
Screw-in bolt 23 Bolt head 29 Fixing bolt 31
Nut A 32 Nut B 44 Insulation seat plate 48
Insulation bush 49 Insulation plate 59 Liner 61
Frame body 63 Fixing screw 64 Leg bracket 65
Slit hole 66 Fixed leg 71 to 78, 91 to 96,98,99 Installation Fixed location

Claims (5)

[Claims] 1. A method for installing a housing of a large electronic device, which has a plurality of installation fixing points at a lower part, on a floor surface having unevenness, which comprises firstly installing a right end and a left end of the housing (9). Installation of two places Each of the pedestals (81-84) on the floor corresponding to the fixed places (91-94) are leveled horizontally, and the housing (9) is installed on the pedestals (81-84). Supporting and fixing only at the installation fixing points (91 to 94) at both ends, and according to the bending of the case (9) caused by it, other fixing installation points (71 to 74) are directly placed on the floor without gaps. A method for installing an electronic device housing, which comprises fixing the electronic device housing. 2. A method of installing a housing of a large-sized electronic device having a plurality of installation and fixing points at a lower part on a floor surface having an uneven surface, wherein the housing (9) is bisected at about the center. Installation of 2 locations Fixed location
Level the pedestal (85,86) on the floor corresponding to (95,96), install the housing (9) on the pedestal (85,86), and install the fixed location.
While supporting and fixing only the (95, 96), while confirming the verticality of the casing (9), other fixed installation locations (75 ~ 78) is fixed to the floor without a gap, and a method for installing an electronic device housing. 3. A method of installing a housing of a large-sized electronic device having a plurality of installation fixing points on a lower part on a building floor having an uneven surface, the method having a flat mounting surface, and fixing legs. It is characterized in that the pedestal (6) that absorbs and fixes the unevenness of the floor by the section (66) is fixed to the floor, and the housing (9) is fixedly installed on the mounting surface of the pedestal (6). The method of installing the electronic device housing. 4. A level-adjustable fixing structure for mounting and fixing a casing on a floor having an uneven surface, which is projected downward at a lower portion of the casing (9) and is fixed parallel to the floor. L-shaped bent iron (1) that forms surface (11) and stud bolt (2) or screw bolt that hangs vertically on the floor surface
(22), nuts A and B (31, 32) screwed into the stud bolt (2) or nut B (32) screwed into the screw-in bolt (22), and the stud bolt (2) or It is composed of an insulating pipe (4) that passes through the screw-in bolt (22) and two insulating seat plates (44). The stud bolt (2) has a nut B (32),
Insulation seat plate (44), insulation pipe (4), L-shaped bent iron (1) fixing surface (1
1), pass through the insulating seat plate (44) and nut A (31), screw up the nut B (32) from below, and attach the lower insulating seat plate (11) to the lower surface of the fixed surface (11) of the L-shaped bent iron (1). 44), the nut A (31) is screwed down and fixed through the upper insulating seat plate (44), and the screw B (22) is attached to the nut B (32) from below. Insulation seat plate (44), insulation pipe (4), L-shaped bent iron (1) fixing surface (11),
Place the insulating seat plate (44) and the bolt head (23) in that order, and then screw in the screw bolt (22) from the top to bring the upper insulating seat plate (44) into close contact with the upper surface of the fixed surface (11) of the L-shaped bent iron (1). ), The nut B (32) is tightened and fixed through the insulating seat plate (44) under the screw, and the casing (9) is electrically connected to the floor. An installation / fixing structure for an electronic device housing, which is insulated and level-adjusted to an arbitrary height position for installation / fixation. 5. A level-adjustable fixing structure for mounting and fixing a casing on an uneven floor surface, wherein a stud into which a screw bolt (22) or a nut A (31) vertically installed on the floor surface is screwed. The bolt (2), the stud bolt (2) or the threaded bolt (22), the insulating tube (4), the two insulating seat plates (44), and the level adjusting seat (5) are movable. It is composed of a pedestal (8) screwed in the center, and a stud bolt (2) or screw-in bolt (22) from the bottom to the pedestal (8), insulating seat plate (44), insulating pipe (4), L Fixed surface (11) of curved iron (1), insulating seat plate (44), nut A (31) or bolt head
Overlap in order of (23), screw up the level adjustment seat (5), and fix the L-shaped bent iron (1).
(11) After the lower insulation seat plate (44) is attached to the lower surface, the nut A (31) or screw-in bolt (22) is screwed down.
(44) is tightened and fixed, and the housing (9) is electrically insulated from the floor surface, level-adjusted to an arbitrary height position, and installed and fixed. Fixed installation structure.