JPH0665822B2 - Building pillar - Google Patents

Description

TECHNICAL FIELD The present invention relates to a pillar of a building suitable for use in, for example, a building of a factory handling light electrical equipment.

“Prior Art” In general, columns made of reinforcing bars and steel frames are used in so-called reinforced concrete buildings. Needless to say, the reinforcing bars and steel frames of these pillars are magnetic bodies, and are often magnetized by various external influences during the manufacturing process, building process, and the like.

"Problems to be solved by the invention" By the way, for example, in a factory that handles light electric devices such as a television, work related to the adjustment of the scanning electron beam such as screen adjustment work is performed, but the pillars of the factory building are magnetized. If this happens, the magnetic field may be disturbed in the factory, which may hinder the above work. In particular, flat televisions, which have become widespread in recent years, perform screen control using a relatively weak magnetic field, and are therefore easily affected by the disturbance of the magnetic field, and it is necessary to keep their working position as close to the pillar as possible. Therefore, in the above-mentioned factory, due to the magnetism of the columns, there is a problem that the degree of freedom in laying out the work line is significantly reduced.

The present invention has been made in view of the above circumstances, and an object thereof is, when a magnetic material such as a reinforcing bar or a steel frame that is a structure of a column is magnetized, the influence of the magnetic field is surrounded by those columns. It is to provide the pillars of the building that prevent it from reaching the existing space.

[Means for Solving Problems] In order to achieve the above object, the pillar of the building of the present invention is a surface of the pillar main body containing a magnetic material as a constituent material, and the height is 1.8 m from the floor. A magnetic shield layer made of a high magnetic permeability material is provided. As the high magnetic permeability material, silicon steel sheet, amorphous tape, amorphous powder, ferrite powder, or the like is preferable. The silicon steel plate is bent or curved and attached to the surface of the column body by appropriate means. Amorphous tape is wrapped around the pillar body. Amorphous powder, ferrite powder, etc. are mixed with paint or mortar and applied to a composite panel for use.

[Examples] Hereinafter, the present invention will be described based on examples shown in the drawings.

FIG. 1 shows a first embodiment of the present invention, in which reference numeral 1
Is the pillar body. The column main body 1 is a so-called reinforced concrete rectangular column in which reinforcing bars (magnetic material) 2 ... Are integrally embedded as a constituent material as shown in FIG.
A magnetic shield layer 3 is provided on a part of the surface of the pillar body 1, that is, a part within a range from the floor F to a predetermined height h (about 1.8 m) so as to cover the entire surface. The magnetic shield layer 3 is made of, for example, four silicon steel plates (high magnetic permeability material) 3a. Both side edges of the steel plates 3a are bent substantially at right angles, and the steel plates 3a are fitted to the pillar body 1 so as to hold the side surfaces of the pillar body 1, and are joined together by means such as welding or fasteners.

In the column thus configured, the magnetic force lines generated by the magnetizing of the reinforcing bar 2 are drawn near the magnetic shield layer 3 so as to pass through the magnetic shield layer 3. That is, since the magnetic field generated by the reinforcing bar 2 is concentrated near the surface layer of the column, the distribution range of the magnetic force lines centering on the column is narrowed. Therefore, when applied to a factory or the like that handles weak electric equipment, it is possible to reduce the degree of influence of the magnetic field of the column on the handled equipment. Incidentally, in the case of a television, for example, when a magnetic field is applied across the screen, the screen tends to be distorted in the vertical direction (upward or downward).

On the other hand, FIG. 3 shows a second embodiment of the present invention. In this figure, the magnetic shield layer 4 is a silicon steel plate as in the first embodiment, but this magnetic shield layer 4 is provided only on one side surface of the column main body 1, and the influence of the magnetic field particularly at the position facing this surface is affected. It is configured to hold down. By the way, this silicon steel sheet
(4) is provided with an anchor member 4a on its back surface, and is integrally embedded in the surface of the column main body 1 by utilizing this anchor member 4a.

Also, FIGS. 4 and 5 show a third embodiment and a fourth embodiment of the present invention, respectively. The magnetic shield layer 5 in FIG. 4 is formed by winding an amorphous tape around the column main body 1, and the magnetic shield layer 6 in FIG. 5 is a powder of a high magnetic permeability material (for example, amorphous powder or ferrite powder). ) Is mixed with a binder (for example, an aqueous emulsion paint or mortar) and applied to a composite panel, and the composite panel is attached to the surface of the column main body 1. All of these columns have good workability.

Next, the working effects of the present invention will be made clearer by showing examples.

Experiment contents Targeting a pillar corresponding to the above-mentioned first, third and fourth embodiments and a conventional pillar (comparative example) having no magnetic shield layer, the magnetic flux density around the pillar is measured by using a Gauss meter, The vertical sync reading (the number of multiple horizontal lines displayed on the screen of the test pattern) was measured using a flat TV. Gauss meters and flat screen TVs from the floor.
I set it to a height of 7 m. The results of this experiment are shown in FIGS. 6 and 7. However, the north, south, east, and west directions in the figure indicate the orientation of the Gauss meter or flat TV with respect to the pillar.
In addition, although the fourth embodiment I uses the amorphous powder mixed in the paint as the magnetic shield layer, the fourth embodiment II
Is a ferrite powder mixed with mortar. Further, in the figure, the horizontal axis indicates the distance from the column to the measurement position (unit: mm), and the vertical axis indicates each measured value.

As can be seen from these figures, the measured value is almost constant at a position approximately 1 m or more away from the pillar regardless of the type and presence of the magnetic shield layer or the orientation with respect to the pillar. On the other hand, at a position less than 1 m from the pillar, the measured value is different depending on the azimuth as shown mainly in the measured value of the comparative example (this is considered to be mainly due to the geomagnetism). However, the presence of the magnetic shield layer As a result, the magnetic flux densities in the respective directions at positions close to the pillar (positions less than 1 m) become uniform, and come close to the values of the magnetic flux density at positions distant (positions distant by 1 m or more).

In the above embodiment, the pillar body 1 is a prism, but
Of course, the shape is not limited to this, and may be a column or a polygonal column. Further, the pillar main body 1 may be a steel concrete pillar or a steel pillar.

[Advantages of the Invention] As described above, according to the present invention, a magnetic shield made of a high magnetic permeability material is provided on the surface of a pillar main body including a magnetic material as a constituent material and within a height range of 1.8 m from the floor surface. Since the layers are provided, the following excellent effects can be obtained.

That is, the magnetic force lines generated by the magnetization of the magnetic substance gather near the surface layer of the column, so that the distribution range of the magnetic line of force around the column is narrowed. In particular, the magnetic flux density in each direction at a position close to the pillar becomes uniform and approaches the value at a position far away. Therefore, since the disturbance of the magnetic field around the column can be suppressed, when applied to a factory or the like that handles weak electric equipment, the degree of influence of the magnetic field on the handled equipment can be reduced. That is, the precision and efficiency of the work related to the adjustment of the scanning electron beam can be improved, and the work space can be used as effectively as possible (the degree of freedom in laying out the work line can be significantly increased). In addition, the magnetic shield layer is 1.8 m above the surface of the pillar body and above the floor.
Since it is provided in the range, it is possible to intensively magnetically shield the range in which the disturbance of the magnetic field occurs when performing the work related to the adjustment of the scanning electron beam, etc. Compared with the case of covering the entire space from the ceiling surface to the slab surface on the upper floor, the cost can be significantly reduced, and it can be easily applied to an existing building.

[Brief description of drawings]

1 is a side view showing a first embodiment of the present invention, FIG. 2 is a view taken along the line II-II of FIG. 1, and FIG. 3 is a transverse sectional view showing a second embodiment of the present invention. 4 is a side view showing a third embodiment of the present invention, FIG. 5 is a cross sectional view showing a fourth embodiment of the present invention, and FIG.
FIG. 7 and FIG. 7 are diagrams showing the experimental results for clarifying the action and effect. 1 ... Pillar body, 2 ... Reinforcing bar (magnetic material), 3, 4, 5, 6
...... Magnetic shield layer, 3a ...... Silicon steel plate (high magnetic permeability material), 4a ...... Anchor member, F ...... Floor, h ...... Height.

Continuation of the front page (56) Reference JP-A-61-76359 (JP, A) JP-A-61-68959 (JP, A) Actual development Shou-55-179395 (JP, U) JP-B-55-13600 (JP , B2) Japanese Patent Publication Sho 58-12475 (JP, B2)

Claims (1)

[Claims] 1. A pillar of a building, wherein a magnetic shield layer made of a high-permeability material is provided on the surface of a pillar main body containing a magnetic material as a constituent material and at a height of 1.8 m from the floor surface.