JPH0729114U - Closed Hollow Cement Board - Google Patents

Abstract

(57) [Abstract] [Purpose] To facilitate the work of mounting a hollow cement plate on site and improve the water-stopping property of the hollow cement plate after mounting. A hollow cement plate main body 100 having a plurality of hollow portions 101 that extend in parallel to each other in a plane direction and open at both ends, and one side 103 of the hollow cement plate main body 100 to the vicinity of both ends of the hollow portion 101. A mounting bracket 200 integrally having a female screw portion 212 inserted into a perforation 104 opened toward the inside and fixed in the hollow portion 101;
The hollow member 101 is provided with a sealant 300 that is hermetically filled in the open end portions.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hollow cement board used for an outer wall material of a building, for example.

[0002]

[Prior art]

 Conventionally, this type of hollow cement plate has a lightweight structure in which a large number of hollow portions 11 are formed inside, as shown by reference numeral 10 in FIGS. 6 and 7, and is extruded and molded in a cement factory. It is a thing. Each of the hollow portions 11 extends in parallel to each other in the plane direction, both ends are open, and the cross-sectional shape cut at a right angle to the extending direction is substantially rectangular.

A hollow cement board 10 as an outer wall material of a building is a mountain-shaped cement column 10 which is tightly connected to a steel column 20 in the outer wall portion of the building so as to form a T shape with a flat steel 21 at the center of the outer surface of an outer flange portion 20a thereof. Steel 22, a Z clip 23 welded to each of the chevron steel 22, a square nut 1 arranged in the hollow portion 11 of the hollow cement plate 10, a Z clip 23, and a screw with the square nut 1. It is attached via a mating connecting bolt 2. Further, the joint gap between the hollow cement plates 10 and 10 adjacent to each other in the plane direction is sealed by packing the packing 3 and the sealing material 4.

That is, in the conventional installation work of the hollow cement board 10, first, in the vicinity of the end of the hollow cement board 10 carried into a construction site, a bolt is inserted from one side 10 a of the hollow cement board 10 toward the hollow section 11 with a drill. Of the hollow cement plate 10, the square nut 1 is manually inserted into the hollow portion 11 of the hollow cement plate 10, and the female screw portion thereof is aligned with the above-mentioned drilling hole, and the bolt insertion hole opened at the end of the Z clip 23. Through the perforation, the connecting bolt 2 is screwed into the female screw portion of the square nut 1 in the hollow portion 11 to be tightly connected. After mounting, the packing 3 and the sealing material 4 are packed in the joint gap between the adjacent hollow cement plates 10, 10.

[0005]

[Problems to be solved by the device]

 According to the above-mentioned conventional hollow cement board 10, the following problems have been pointed out. First of all, in order to fasten the hollow cement plate 10 to the Z clip 23 of the mounting partner via the square nut 1 and the bolt 2, the square nut 1 inserted into the hollow portion 11 of the hollow cement plate 10 is manually operated. The bolt 2 must be screwed in while pressing and holding it with aligning it with the drilled hole, and that alignment is difficult, and in order to prevent co-rotation of the square nut 1 during tightening, it must be completely tightened. Since the square nut 1 has to be continuously held by hand, the labor of the work is great.

Secondly, when mounting the hollow cement board 10, the square nut 1 is inserted into the hollow portion 11 of the hollow cement board 10 on site, and while being held by hand, it is tightly connected to the Z clip 23 with the bolt 2. Since it is necessary to stop the water only with the packing 3 and the sealing material 4 which are packed after the hollow cement plate 10 is attached, only the packing 3 and the sealing material 4 packed in such joint gaps can prevent rainwater from raining. That is, it is difficult to reliably prevent the air from wrapping around inside the building from the hollow portion 11 of the hollow cement plate 10.

The present invention has been made under the circumstances as described above, and its main technical problems are to facilitate the work of installing the hollow cement plate on site and to make the work after the installation. It is to improve the water blocking performance of the hollow cement board.

[0008]

[Means for Solving the Problems]

 As a means for effectively solving the above technical problems, a closed hollow cement board according to the present invention is a hollow cement board having a plurality of hollow portions which extend in parallel to each other in a plane direction and whose both ends are open. The main body and the female screw portion inserted into the perforations opened from one side of the main body of the hollow cement plate toward the vicinity of both ends of the hollow portion are integrally provided, and the mounting metal fitting fixed in the hollow portion, and the hollow portion And a sealing material that is hermetically filled at both ends of the opening.

[0009]

[Action]

 Since the hollow cement plate body of the present invention has the fixed nut in the hollow portion of the hollow cement plate body, in the on-site mounting work, the hollow cement plate body is provided with a hole in one side of the hollow cement plate body. It suffices to screw the connecting bolt into which the mounting mating fitting is inserted into the female screw part of the fixed nut and tighten it. Further, since the both ends of the hollow cement plate main body are filled with the sealing material at the open ends, rainwater and the like can be effectively prevented from entering from the hollow part through the perforations and the like.

[0010]

【Example】

 1 and 2 show a closed-type hollow cement plate A according to a first embodiment of the present invention, that is, the closed-type hollow cement plate A is a hollow cement plate having a plurality of hollow portions 101 inside. The main body 100, a mounting member 200 fixed in the hollow portion 101, and a sealant 300 that is hermetically filled in the open ends of the hollow portion 101 are provided.

The hollow cement plate main body 100 is attached as an outer wall material of a building, and is produced in large numbers by extrusion molding at a cement factory. The hollow portions 101 formed therein are parallel to each other in the plane direction. As it extends, both ends are open to the edge portion 102 of the hollow cement board body 100, and the cross-sectional shape cut at a right angle to the extension direction is substantially rectangular. In addition, on one surface 103 of the hollow cement plate body 100, the hollow portion is provided at a position at a predetermined distance from the edge portion 102 in correspondence with a connecting position with a Z clip 23 (see FIGS. 3 and 4) described later. A perforation 104 is opened toward 101.

The mounting member 200 arranged in the hollow portion 101 of the hollow cement plate body 100 includes a fixed nut 210 and a set bolt 220. Among these, the fixed nut 210 is composed of an outer peripheral flange portion 211 having a polygonal planar shape, and a female screw portion 212 welded to the inner periphery thereof, and both axial end portions of the female screw portion 212. 212a and 212b project to both sides in the thickness direction of the brim portion 211, and one projecting end portion 212a is inserted into the perforation 104 of the hollow cement plate body 100. The set bolt 220 is screwed to the other protruding end portion 212b of the female screw portion 212 of the fixed nut 210, and the tip 221 is an inner surface of the hollow portion 101 of the hollow cement plate body 100 opposite to the perforation 104. The flange portion 211 of the fixed nut 210 is pressed against the inner surface 101a on the side of the perforation 104. Further, a cross-shaped or polygonal fitting recess 222 that can be engaged with a screwdriver jig such as a driver is formed at the rear end of the set bolt 220.

The sealing material 300 is made of, for example, a urethane foam material or a cement-based material, and a mortar material mixed with rock wool is preferably used.

In the production of the closed-type hollow cement plate A according to this embodiment, first, the perforation 104 is opened in the one surface 103 of the hollow cement plate body 100, and then the fixed nut 210 and one of the female screw parts 212 of the fixed nut 210 are formed. The protruding end portion 212a is inserted into the hollow portion 101 so that the protruding end portion 212a faces the one surface 103 side of the hollow cement plate body 100, and one protruding end portion 212a of the female screw portion 212 is inserted into the hole 104. Next, the tip of a screwdriver jig (not shown) such as a screwdriver is fitted from the outside of the hole 104 into the fitting recess 222 of the set bolt 220 in the female screw portion 212 of the fixed nut 210 and rotated. The set bolt 220 is propelled in a direction projecting from the other projecting end portion 212b of the female screw portion 212, so that the tip end 221 of the hollow cement plate body 100 on the opposite side of the perforation 104 is formed. The fixed nut 210 is fixed in the hollow portion 101 by press-contacting the inner surface 101b, and then the open end portion of the hollow portion 101 in the edge portion 102 of the hollow cement plate body 100 is filled with the sealing material 300 and sealed. . Then, the production of the closed hollow cement board A including the extrusion molding of the hollow cement board main body 100 to the filling operation of the sealing material 300 is all performed in the cement factory, and in the state shown in FIG. Will be delivered to the building site.

FIG. 3 shows a state in which the closed hollow cement board A is attached as an outer wall of a building, and FIG. 4 shows a partially enlarged view of the attachment structure. Reference numeral 20 denotes H in the outer wall of the building. Steel column made of shaped steel, 21 is a flat steel welded to the center of the outer surface of the outer flange portion 20a of the steel column 20, and 22 is a T-shape with bolts (not shown) on both sides in the thickness direction of the flat steel 21. Angle steels 23, which are tightly connected to each other, are Z-clips, which are welded to the angle steels, respectively, at one end. The shaft portion 31 of the connecting bolt 30 that is screwed with the female screw portion 212 of the fixed nut 210 in the mounting bracket 200 can be inserted into the projecting end portion 23a of the Z clip 23 opposite to the welding end portion. The bolt insertion hole 23b is opened. The connecting bolt 30 is typically a hexagonal bolt.

That is, when the closed-type hollow cement board A is carried into the construction site, the shaft portion 31 of the connecting bolt 30 is attached to the spring washer 40 and the bolt insertion hole formed in the projecting end portion 23 a of the Z clip 23. Through the hole 23b, the hollow cement plate body 100 of the closed type hollow cement plate A is screwed into the projecting end portion 212a of the female screw portion 212 of the fixed nut 210 at the inner periphery of the hollow cement plate body 100 and tightly connected. At this time, since both ends of the hollow portion 101 of the hollow cement plate body 100 are sealed by the sealing material 300, the fixed nut 210 cannot be pressed by hand, but the fixed nut 210 is a set bolt. Since it is fixed in the hollow portion 101 of the hollow cement plate main body 100 by 220, it does not rotate together with the connecting bolt 30, and therefore the binding operation can be easily performed.

When the connecting bolt 30 is completely tightened, the tip of the shaft portion 31 interferes with the set bolt 220 screwed into the other protruding end portion 212b of the female screw portion 212 of the fixed nut 210. The length of the shaft portion 31 is set so as not to do so. After the installation of the closed hollow cement plates A, the packing 3 and the sealing material 4 are packed in the joint gap between the closed hollow cement plates A, which are adjacent to each other in the plane direction.

Therefore, according to the closed-type hollow cement board A of this embodiment, the mounting work at the construction site is preliminarily provided on the Z-clip 23 on the side of the steel column 20 of the building and the hollow cement board body 100. Since only the step of tightly fixing the fixed nut 210 of the mounting bracket 200 with the connecting bolt 30, the on-site work can be performed easily and quickly. Moreover, since the open end portions of the hollow portion 101 of the hollow cement plate body 100 are sealed by the pre-filled sealant 300, rainwater can be prevented from entering the hollow portion 101, and the reliability of the seal at the joint portion can be prevented. It is possible to improve the sex.

Next, FIG. 5 shows a closed-type hollow cement board B according to a second embodiment of the present invention. The difference from the first embodiment is that the hollow portion of the hollow cement board body 100 is hollow. The mounting metal fitting 400 fixed in 101 is provided with a fixed nut 410 and a set nut 420.

Explaining this point in more detail, the fixed nut 410 includes a flange portion 411 on the outer periphery having a polygonal planar shape, a female screw portion 412 on the inner periphery thereof, and an axial direction of the female screw portion 412. A dowel 413 protruding from one end to one side in the thickness direction of the collar 411, and a male screw portion 414 protruding from the other side surface of the collar 411 to the opposite side to the projecting direction of the dowel 413. The dowel 413 is hollow. It is inserted into the perforation 104 of the cement plate body 100. The set nut 420 is screwed to the male screw part 414, and the tip 421 is pressed against the inner surface 101b of the hollow portion 101 of the hollow cement plate body 100 opposite to the perforation 104, whereby the fixed nut is fixed. The flange portion 211 of 210 is pressed against the inner surface 101a on the side of the hole 104. The outer peripheral surface of the set nut 420 has a polygonal columnar shape or a knurled columnar shape.

Therefore, in the production of the closed-type hollow cement plate B, as in the case of the closed-type hollow cement plate A according to the first embodiment, first, the perforation 104 is opened on one side 103 of the hollow cement plate body 100. After that, the fixed nut 410 is inserted into the hollow portion 101 so that the dowel 413 protruding from the female screw portion 412 faces the one surface 103 side of the hollow cement plate body 100, and the dowel 413 is drilled 104 Plug in. Next, by rotating the set nut 420 screwed in advance to the male screw portion 414 of the fixed nut 410 and propelling the set nut 420 in the direction of coming out of the male screw portion 414, the tip 421 of the set nut 420 is pushed. The hollow cement plate body 100 is pressed against the inner surface 101b of the hollow portion 101 opposite to the perforations 104, thereby fixing the fixed nut 410 in the hollow portion 101, and then at the edge portion 102 of the hollow cement plate body 100. The open end of the hollow portion 101 is filled with the sealing material 300 and sealed.

The work of mounting the closed hollow cement plate B at the construction site is the same as that of the closed hollow cement plate A of the first embodiment, that is, it is screwed with the female screw portion 412 of the fixed nut 410. It is just a process of connecting with the Z clip 23 on the side of the steel column 20 of the building via the connecting bolt.

The dowel 413 in the second embodiment may be one in which a continuous female screw is formed similarly to the one projecting end portion 212a of the female screw portion 412 in the first embodiment. Also, the female screw portion 412 in the second embodiment may have a shape protruding to the side opposite to the dowel 413.

[0024]

[Effect of device]

 Since the closed-type hollow cement plate of the present invention is provided with a mounting metal fitting that is screwed into the connecting bolt, the mounting mating metal and the fixed nut inside the hollow cement plate main body are connected bolts when mounting on site. Therefore, it is possible to perform field work easily and quickly. In addition, since both ends of the hollow portion of the hollow cement plate body are sealed with the sealing material, intrusion of rainwater into the hollow portion is prevented and the sealing performance can be improved.

[Brief description of drawings]

1 is a sectional perspective view showing a part of a closed-type hollow cement board A according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a part of the closed hollow cement plate A.

FIG. 3 is an explanatory view showing a state in which the closed hollow cement board A is attached as an outer wall of a building.

FIG. 4 is a sectional view showing a part of FIG. 3 in an enlarged manner.

FIG. 5 is a sectional view showing a part of a closed hollow cement plate B according to a second embodiment of the present invention.

FIG. 6 shows a state in which a hollow cement plate according to the prior art is attached,
It is a sectional view shown with a part of building where this hollow cement board is attached.

7 is a cross-sectional view taken along the line VII-VII ′ of FIG.

[Explanation of symbols]

 100 hollow cement plate main body 101 hollow part 104 perforation 200,400 mounting metal fittings 210,410 fixed nuts 212,412 female screw part 300 sealing material

Claims (1)

[Scope of utility model registration request] 1. A hollow cement plate main body having a plurality of hollow portions which extend in parallel to each other in a plane direction and whose both ends are open, and from one side of the hollow cement plate main body toward the vicinity of both ends of the hollow portion. A mounting member integrally having a female screw part inserted into the opened perforation and fixed in the hollow part; and a sealant sealingly filled in the open ends of the hollow part. The feature is a closed hollow cement board.