JPH0578736U - Ceiling board electromagnetic shield structure - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the formation of electromagnetic gaps at the intersections of main bars and crossbars, to enhance the electromagnetic shield effect, and to stably support the ceiling board. [Structure] Ceiling board 10 is main bar 11 and cross bar 2
1 is mounted on each ceiling plate mounting surface 14, 24 of the main bar 11, and a standing wall 15 for electromagnetic shielding is erected on the ceiling plate mounting surface 14 of the main bar 11, and the cross bar 21 is mounted on the standing wall 15. The cutout portion 16 into which the abutting end portion 21a of FIG. Further, by setting the upper end portion of the rising wall 15 and the ceiling plate mounting surface 24 of the cross bar 21 at substantially the same height, a gap is created between the ceiling plate 10 and the bars 11 and 21. Was prevented.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ceiling system structure having an electromagnetic shield function.

[0002]

[Prior Art]

 In the conventional ceiling system, the four sides of the ceiling plate are mounted on the ceiling plate mounting surfaces of the pair of main bars and the pair of cross bars that are bridged between these main bars. This is a structure in which the intersections with and are connected to each other, and this connection structure is shown in FIG. In the figure, at the intersection 6 of the L-shaped aluminum main bar 1 and the T-shaped aluminum cross bar 2, the side surface 4a of the ceiling plate mounting surface 4 of the main bar 1 and the end surface 2a of the cross bar 2 face each other. In this state, the web 7 of the crossbar 2 is connected to the web 7 of the main bar 6 via the L-shaped joint 3, and the ceiling plates are placed on the ceiling plate mounting surfaces 4 and 5 of the bars 1 and 2. (Not shown) is placed.

[0003]

[Problems to be solved by the device]

 By the way, when developing a ceiling system equipped with an electromagnetic shield function, leakage of electromagnetic waves becomes a problem. However, in the above conventional ceiling system, the ceiling plate mounting surface 4 of the main bar 1 and the ceiling of the crossbar 2 are used. Since the plate mounting surface 5 and the plate mounting surface 5 face each other in the same plane, it is inevitable that an electromagnetic gap G is generated at the intersection 6 of the bars 1 and 2 as shown in FIG. There is a problem that electromagnetic waves leak to the outside through the gap G and a sufficient electromagnetic shielding effect cannot be obtained.

The present invention has been made in view of the above-mentioned conventional problems, and prevents an electromagnetic gap from being generated at the intersection between the main bar and the crossbar, and enhances the electromagnetic shield effect of the ceiling board. An object of the present invention is to provide an electromagnetic shield structure for a ceiling plate that can prevent a gap from being generated between each bar and the ceiling plate.

[0005]

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a pair of metal cloths having four side portions of a ceiling plate bridged between a pair of metal main bars and these main bars. It is placed on each ceiling plate mounting surface with the bars, and the intersections of the main bars and crossbars are connected to each other, and the pair of main bars rises along the longitudinal direction on the ceiling plate mounting surfaces. A wall is erected, and a notch is formed at the intersection of the rising wall with the crossbar so that the abutting end of the crossbar fits. The upper end of the rising wall and the ceiling plate mounting surface of the crossbar are set at substantially the same height.

[0006]

[Action]

 According to the present invention, the lower surface of the abutting end of the crossbar is overlapped with the ceiling plate mounting surface of the mainbar, which is different from the conventional structure in which the intersection of the mainbar and the crossbar is simply butted. , No electromagnetic gap is created at the intersection of each bar, the leakage of electromagnetic waves from this intersection is eliminated, and the electromagnetic shielding effect is significantly improved. Moreover, since a rising wall is provided on the ceiling plate mounting surface of the main bar and the upper end portion of the rising wall on which the ceiling plate is mounted and the ceiling bar mounting surface of the crossbar are set to substantially the same height. Therefore, there is no gap between the ceiling board and each bar, and the ceiling board can be supported stably.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 2, the ceiling system is such that the four sides 10a to 10d of the ceiling board 10 are a pair of aluminum T-shaped main bars 11 and a pair of aluminum T-shaped cross bars that are bridged between these main bars 11, 11. 21 and 21. The intersecting portions 30 of the bars 11 and 21 are superposed on each other and connected to each other by a joint 9. The T-shaped main bar 11 includes a hanger mounting portion 12 mounted on the hanger 9, a vertical web 13, a pair of left and right ceiling plate mounting surfaces 14 and 14, and an outer portion of each ceiling plate mounting surface 14, respectively. As shown in FIG. 1, the T-shaped crossbar 21 is composed of a pair of upright walls 15 and 15 which are erected upright, a hanger attachment portion 22, a vertical web 23, and a pair of ceiling plates. And surfaces 24, 24.

The rising wall 15 of the main bar 11 is extended at a predetermined height H along the longitudinal direction of the ceiling plate mounting surface 14, and this height H is the abutting end portion of the crossbar 21. 21a is placed on the ceiling plate mounting surface 14 of the main bar 11, and the upper end portion 15a of the rising wall 15 and the ceiling plate mounting surface 14 are set to be substantially flush with each other. Further, a cutout portion 16 having a width D substantially equal to that of the abutting end portion 21a of the crossbar 21 is formed at a position where the rising wall 15 intersects with the crossbar 21. By fitting the abutting end 21a of the crossbar 21 into the notch 16, the lower surface of the abutting end 21a can be overlapped on the ceiling plate mounting surface 14 of the main bar 11, and the crossbar The end surface 23 a of the 21 can be abutted against the web 13 of the main bar 11.

According to the above configuration, as shown in FIG. 3, the lower surface of the butt end 21 a of the crossbar 21 is superposed on the ceiling plate mounting surface 14 of the main bar 11, and the end surface 23 a of the crossbar 21 is further stacked. Since it is in surface contact with the web 13 of the main bar 11, unlike the conventional ceiling structure, an electromagnetic gap does not occur at the intersection 30 of the bars 11 and 21, and a ceiling system having an excellent electromagnetic shield effect is obtained. Can be obtained. Moreover, since the upper end portion of the rising wall 15 of the main bar 11 is set at substantially the same height as the ceiling plate mounting surface 24 of the cross bar 21, there is a gap between the ceiling plate 10 and each bar 11, 21. Does not occur, and the ceiling board 10 can be stably supported.

The ceiling system according to the present invention is not limited to the combination of the T-shaped main bar 11 and the T-shaped crossbar 21 described above, and the L-shaped main bar and the T-shaped main bar arranged in the accommodation portion between the ceiling portion and the wall surface. It can also be applied in combination with a mold crossbar. That is, as shown in FIG. 4, a rising wall 15 'for electromagnetic shielding is erected on the ceiling plate mounting surface 14' of the L-shaped main bar 11 'arranged in the storage part. By fitting the T-shaped crossbar 21 in the cutout portion 16 'of 15', as shown in FIG. 5, it is possible to eliminate an electromagnetic gap at the intersection portion 30 'of each bar 11', 21.

The main bar and the cross bar are not limited to aluminum and may be made of steel, for example.

[0012]

[Effect of the device]

 According to the present invention, as described above, the four sides of the ceiling plate are mounted on the respective ceiling plate mounting surfaces of the pair of metal main bars and the pair of metal cross bars spanning between the main bars. The ceiling walls of the pair of main bars are provided with standing walls along the longitudinal direction thereof, and the butt ends of the cross bars are fitted to the intersections of the rising walls with the cross bars. Since the bottom surface of the butt end is overlapped with the ceiling plate mounting surface of the main bar by providing a notch to be fitted, an electromagnetic gap is prevented from occurring at the intersection of each bar. As a result of eliminating leakage of electromagnetic waves from this intersection, it is possible to obtain a ceiling system having an excellent electromagnetic wave shielding effect. However, since the upper end of the rising wall on which the ceiling plate is mounted and the ceiling plate mounting surface of the cross bar are set at approximately the same height, there is a gap between the ceiling plate and each bar. There is also an effect that it can be prevented from occurring and the ceiling board can be stably supported.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a main bar and a cross bar according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view of a ceiling system using the main bar and the cross bar of FIG.

FIG. 3 is a schematic plan view showing an intersection of a main bar and a cross bar of FIG.

FIG. 4 is an exploded perspective view of a main bar and a cross bar according to another embodiment of the present invention.

FIG. 5 is a schematic plan view showing an intersection of a main bar and a cross bar of FIG.

FIG. 6 is a perspective view showing a connected state of a main bar and a cross bar according to a conventional example.

FIG. 7 is a schematic plan view showing an intersection of a main bar and a cross bar of FIG.

[Explanation of symbols]

 10 Ceiling board 11 Main bar 14 Ceiling board mounting surface 15 Standing wall 15a Upper end 16 Notch 21 Crossbar 21a Butt end 24 Ceiling board mounting surface 30 Intersection

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁵ Identification code Office reference number FI Technical display location E04H 9/14 Z 9024-2E H05K 9/00 N 7128-4E

Claims (1)

[Scope of utility model registration request] 1. The four sides of the ceiling plate are mounted on respective ceiling plate mounting surfaces of a pair of metal main bars and a pair of metal cross bars spanning between the main bars. The intersections of the main bar and crossbar are connected to each other,
A standing wall is erected on the ceiling plate mounting surfaces of the pair of main bars along the longitudinal direction thereof, and a notch in which a butt end of the cross bar fits at an intersection of the rising wall with the cross bar. And a lower surface of the abutting end portion is overlapped with the ceiling plate mounting surface of the main bar, and the upper end portion of the rising wall and the ceiling plate mounting surface of the crossbar are set at substantially the same height. The electromagnetic shielding structure of the ceiling plate, which is characterized by