JPH0132395Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application This invention relates to a connecting device at a cross-shaped joint of a ceiling panel that constitutes the ceiling of a prefabricated radio wave shielding room, a prefabricated freezer, a refrigerator, or the like.

Prior art and its problems In a prefabricated radio wave shielding room, for example, as shown in Fig. 4, a plurality of rectangular floor panels are arranged in a continuous manner to form a floor, and a plurality of rectangular wall panels are placed on the floor. are lined up to form a wall, and on top of the wall is a ceiling 1 consisting of a plurality of rectangular ceiling panels 101.
02 is assembled.

However, for example, when forming the ceiling 102, there is a possibility that a gap may occur in the joint portion 103 of the adjacent ceiling panels 101, 101. In particular, when a gasket is disposed between the panels 101, 101, gaps are likely to occur due to the elasticity of the gasket. If such a gap occurs, radio waves will leak outside the room when performing electrical discharge machining or other work inside the radio wave shielding room, causing interference with televisions and other devices.

In general, the panels constituting the room walls, including the ceiling panel 101, have a sandwich structure consisting of a core material made of a heat insulating material and metal front and back skin materials covering both sides of the core material. When such a panel 101 is used for the ceiling 102, in order to eliminate the above-mentioned obstruction on the ceiling 102, at least one of the front and back skin materials of the adjacent panels 101, 101 that forms the indoor surface is It is already known that it is sufficient to keep the current flowing so that the flow of electricity does not stop at the joint 103. However, if the gap exists in the panel joint 103, it is impossible to keep the skin materials of the adjacent ceiling panels 101, 101 energized in the gap.

Therefore, the present applicant proposed electrically connecting the gap between two adjacent panels using the connecting device shown in Utility Model Application No. 59-17670.

If the size of the room is small, as shown in Figure 4, multiple vertically rectangular ceiling panels 1
Since 01 and 101 are arranged in a continuous manner only in the horizontal direction, the panel joint portion 103 is in the shape of a single character, which could be solved by the above proposal.

However, when the size of the room increases, as shown in FIG. A panel joint portion 106 occurs, which could not be adequately addressed by the above proposal.

That is, as shown in FIG. 6, the width of the cross-shaped panel joint part 106 that is created when four ceiling panels 101, 101, 104, 104 are consecutively arranged two each in the vertical and horizontal directions is ceiling panel 1
Due to the elasticity of the gasket interposed between the connection surfaces of the ceiling panels 101, 101, 104, 104, the tolerance was exceeded, and each ceiling panel 101, 101, 104, 1
There was a risk that the conductive connection between the 04 and 04 would not be possible.

Further, even when a gasket is not used, there remains a possibility that conductive connection cannot be established.

This idea was made in view of the above-mentioned circumstances, and it is possible to electrically connect the gaps between the cross-shaped joints of the panels that make up the ceiling. It is an object of the present invention to provide a connecting device for a cross-shaped joint of a ceiling panel, which can completely prevent leakage of radio waves from the panel joint of the ceiling when applied to the ceiling.

Solution to the Problem The connecting device at the cross-shaped joint of the ceiling panel according to this invention is arranged between a plurality of quadrilateral ceiling panels that are arranged in a continuous manner in the vertical and horizontal directions, and arranged on the upper side of these panels. A ceiling reinforcing beam with a plate-shaped part that covers either one of the cross-shaped panel joints including the center of the cross and spans adjacent ceiling panels, and the cross-shaped panel joints Connecting members are arranged at the corner of the ceiling panel facing the center of the cross in groups of four per center of the cross along both sides of the beam, and are fixed to the ceiling panel with bolts from the top side of the ceiling panel. Connecting parts are provided on both side edges of the plate-like part of the beam and the edge of the connecting member on the beam side, and the beam is fixed at both connecting parts, and the connecting member has a connecting part that crosses the beam. It is characterized in that an upwardly protruding connecting portion is provided along the one-character joint portion, and the opposing connecting portions are fixed to each other.

Embodiments Hereinafter, embodiments of this invention will be described with reference to the drawings.

In this embodiment, the connecting device according to this invention is applied to a cross-shaped panel joint in a ceiling panel of a prefabricated radio wave shielding room. In the following description, "front and back" and "left and right" refer to the front and back and left and right of each drawing.

Figure 1 shows a set of four ceiling panels 1, 2, 3, and 4 arranged two adjacently in the vertical and horizontal directions out of all the panels that make up the ceiling of the radio wave blocking room. The state seen from above is shown. Each ceiling panel 1, 2, 3, 4 has a core material 5 made of heat insulating material,
6, 7, 8, and metal front and back skin materials 9, 10, 11, 12 that cover both the front and back sides of the core materials 5, 6, 7, 8.
It has a Sandermanch structure consisting of.

Two ceiling panels 2 and 4 next to each other on the left and right in front
As shown in FIG. 2, the parts to be connected are made of extruded plastic material having approximately U-shaped grooves 14 that open toward the mating panels 4, 2 and extend over the entire length of the panels 2, 4. A frame material 13 made of Small grooves 15 are provided in the bottom wall 14a of the concave groove 14 at positions closer to the both side walls 14b, each opening toward the mating panels 4 and 2 and extending in the longitudinal direction. The edges 10a and 12a of the front and back skins 10 and 12 of the panels 2 and 4 are folded in along the inner surface of the side wall 14b of the groove 14.

A groove 16 made of extruded plastic material is arranged between each groove 14 of the two floor panels 2 and 4, and an insulating gasket 18 and a conductive gasket 17 are arranged along each of the front and back sides of the groove 16. There is.

The cross section 16 has a substantially U-shaped cross section and has a front wall 16a.
, the back side wall 16b, and the front and back side walls 16a, 16b.
gasket fitting grooves 19 are provided on the front side of the front side wall 16a and the back side of the back side wall 16b, respectively. And Hiragane 16 is the front and back side walls 1
By fitting the right side edges of 6a and 16b into the small grooves 15 in the frame material 13 of the right panel 2, it can be attached to the right panel 4 and the left panel 2.
It also enters into the concave groove 14 of.

The conductive gasket 17 consists of a gasket main body 17a made of insulating rubber and a sheet-like conductive member 17b covering the outer circumferential surface of the gasket body 17a, and is tightly fitted into the gasket fitting groove 19 of the groove 16, so that both panels 2, 4 Folded edge 10 of backing material 10, 12 of
a, 12a. The size of the conductive gasket 17 is such that the conductive gasket 17 fits into the groove 19.
and edges 10a, 12a, and are sized so that they are sandwiched and pressed against each other. In this way, both panels 2,
The skin materials 10 and 12 of No. 4 are conductive gaskets 7
electrically connected via.

The insulating gasket 18 is made of insulating rubber, and its size and fitting condition are the same as those of the conductive gasket 17.

Note that by using the conductive gasket 17 instead of the insulating gasket 18, the skin material 1 of both panels 2 and 4 can be
0 and 12 may be electrically connected to each other.

The connecting portions between both panels 2 and 4 and the two panels 1 and 3 arranged in the longitudinal direction are also configured in the same manner as described above.

Furthermore, as shown in FIGS. 1 and 2, among the cross-shaped joints that occur when a set of four ceiling panels 1, 2, 3, and 4 are arranged, a vertical single-character-shaped panel joint that includes the center of the cross A ceiling reinforcing beam 20 having a plate-shaped portion 20a that covers the ceiling panels 1, 2, 3, and 4 and spans the adjacent ceiling panels 1, 2, 3, and 4 is arranged at the vertical panel joint portion. The beam 20 is made of lip H-shaped steel, and one flange thereof has a plate-like portion 20a.
It is becoming. Connecting portions 20b consisting of lips are provided on both left and right edges of the plate-like portion 20a. This beam 20 has a plate-shaped portion 20a spanning four left and right panels 1, 2, 3, and 4, and a tape 21 having heat insulating properties and preferably also waterproof properties. They are arranged at the panel joints of panels 1, 2, 3, and 4 in the form of vertical single letters. tape 21
are made from, for example, urethane foam, vinyl chloride foam, and ethylene propylene terpolymer foam. These foams may be impregnated with a water repellent.

Two ceiling panels 2 and 4 next to each other on the left and right in front
A nut 22 is embedded inside. This nut 22 is fixed by a nut holding member 23 made of extruded aluminum and embedded in the core members 5, 6, 7, and 8. That is, the skin materials 9, 10,
Bolt through holes are drilled in 11 and 12,
The nut holding member 23 is attached to the skin material 9, 10, 11, 1 so that this hole corresponds to the screw hole of the nut 22.
2 It is pasted on the inside.

Connecting member 24 in left front panel 2
The base 24 includes a rectangular plate-like base 24a, a connecting portion 24b integrally formed by bending the front half of the right edge of the base 24a, and the base 24a.
It consists of a connecting part 24c that is integrally formed by bending the rear side edge part of a vertically upward,
One bolt through hole 25 is drilled in the center of the base portion 24a, and one screw hole is drilled in the center of the connecting portion 24c.

The left rear connecting member 26 is symmetrical with the front connecting member 24, and has a base 26a and a connecting portion 2.
6b and a connecting portion 26c, one bolt through hole 27 is drilled in the center of the base 26a, and the connecting portion 2
One screw hole is drilled in the center of 6c.

These connecting members 24 and 26 are arranged so that their bolt through holes 26 and 27 match the bolt through holes in the skin material 10, and the connecting portion 24
The connecting portion 20b of the beam 20 is loosely fitted to b and 26b, and the bolt 28 is screwed into the nut 22, and the screw 29 passing through each screw hole between the opposing connecting portions 24c and 26c is screwed into the nut 30. Fixed.

These connecting members 24 and 26 connect the front and rear adjacent panels 2 and 1.

In addition, in FIG. 1, the connecting members 31,
It is connected by 32.

Each connection part 24b, 26b, 31b, 32b in each connection member 24, 26, 31, 32 and beam 2
A wedge 33 is provided between the connecting portion 20b of
is driven into both connecting parts 24b, 20b, 26
b, 20b, 31b, 20b, 32b, and 20b are fixed. At this time, the left and right connecting members 24,
Since force is applied to panels 31, 26, 32 in the direction of bringing them closer together, the panels 2, 4, 1, which are adjacent to each other on the left and right,
3 connections will become stronger over time.

Effects of the invention The connecting device at the cross-shaped joints of ceiling panels according to this invention is constructed as described above, so the cross-shaped joints that occur when a plurality of quadrilateral ceiling panels are consecutively arranged in the vertical and horizontal directions. It becomes possible to reduce the gap at the joint part of the shaped panel to a predetermined width. Therefore, if this connecting device is applied to the ceiling of a prefabricated radio wave shielding room, for example, conductive connection can be made at the cross-shaped panel joints of the ceiling panel, and leakage of radio waves from the joints can be completely prevented. I can do it.

Moreover, according to the connecting device according to this invention, because of the above-described configuration, even when the ceiling panels are dismantled, the connections between the ceiling panels can be released with a simple operation.

[Brief explanation of the drawing]

Figures 1 to 3 show one embodiment of this invention; Figure 1 is a partially cutaway plan view showing the ceiling panels after they are connected, as seen from the outside;
FIG. 2 is an enlarged sectional view taken along the line - in FIG. 1, and FIG. 3 is an enlarged perspective view of essential parts showing the ceiling panel in the middle of connection as seen from the outside of the room. Also, Figures 4 to 6 show the arrangement of conventional ceiling panels, respectively. Figure 4 is a plan view showing the arrangement of ceiling panels that make up the ceiling of a small room, and Figure 5 is a plan view of a large room. FIG. 6 is a plan view showing the arrangement of ceiling panels constituting the ceiling of a room, and FIG. 6 is an enlarged plan view of a main part showing a cross-shaped joint in FIG. 1, 2, 3, 4...Ceiling panel, 20...Beam,
20a...plate-like part, 20b...connection part, 22...
Nut, 24, 26, 31, 32... connection member,
24b, 26b, 31b, 32b...Connection part, 2
4c, 26c, 31c, 32c...Connection part, 28
……bolt.

Claims (1)

[Scope of utility model registration request] A plurality of quadrilateral ceiling panels 1, 2, 3, 4 arranged in a continuous manner in the vertical and horizontal directions, and the center of the cross among the cross-shaped panel joints that are arranged on the upper surface of these panels and are formed when they are arranged. A plate-shaped part 2 that covers the joint part of one of the single-character-shaped panels and spans the adjacent ceiling panels 1, 2, 3, and 4.
Ceiling reinforcing beam 20 with 0a, and ceiling panels 1, 2, 3, facing the center of the cross of the cross-shaped panel joints.
At the four corners, mark the center of the cross 1 along both sides of the beam 20.
Connecting members 24, 26, 31, which are arranged in groups of four per unit and are fixed to the ceiling panels 1, 2, 3, 4 by bolts 28 from the top side of the ceiling panels 1, 2, 3, 4, 32, both side edges of the plate-like portion 20a in the beam 20 and the connecting member 2
Connection portions 20b, 24b, 26b, 31 are provided at the edges of the beams 20 at 4, 26, 31, and 32, respectively.
b, 32b are provided, and the beam 20 connects both connecting portions 20.
b, 24b, 26b, 31b, 32b, and the connecting members 24, 26, 3
1 and 32, there are upwardly protruding connecting portions 24c, 26c, 31c along the line-shaped joint portion that crosses the beam 20,
32c is provided and the opposing connecting portions 24c, 26c,
A connecting device at a cross-shaped joint of a ceiling panel where 31c and 32c are fixed together.