JPH0339527Y2 - - Google Patents

Description

[Detailed explanation of the invention] (1) Industrial application field This invention is a precast. It prevents concrete panels from being damaged or falling off due to their own weight, earthquakes, wind pressure, etc., and also follows the deformation of the building frame caused by these forces, that is, the displacement between stories in both out-of-plane and in-plane directions. A precast constructed as possible. This invention relates to a concrete panel mounting device.

(2) Conventional technology In recent years, as buildings have become taller and the outer wall surface has increased, in order to save labor in concrete pouring work on site, it has become necessary to fabricate the outer wall in advance at a factory and install it efficiently on site. So-called precast. Concrete panels (hereinafter referred to as PC panels) are also larger than conventional panels, as shown in Figure 1.
To attach the PC panel a to the steel frame b, a highly rigid angle d with reinforcing ribs c is fixed to the steel frame, and an anchor bolt e buried in the PC panel a is inserted into the mounting hole f drilled in the angle d. In many cases, the washer g was inserted into the head of the anchor bolt e, the nut h was screwed on, and the nut h was tightened.

(3) Problems to be solved by the invention However, with the above-mentioned mounting device, the rigidity of the angle increases dramatically due to rib reinforcement, and if the steel frame is deformed for some reason, the angle will flex. This resulted in the drawback that problems could arise in the method of tracking out-of-plane interlayer displacement.

(4) Means to solve the problem The present invention is a PC panel mounting device that solves the above problems.When displacement occurs between stories in the steel frame due to earthquakes, wind pressure, etc., the washer installed on the anchor bolt can be fixed. Due to interlayer displacement due to the spherical head of the nut screwed into the anchor bolt by the spherical part and the steel frame side.
This mounting device is constructed to absorb the tilt of the PC panel and prevent it from being damaged or falling off.The construction of the mounting device will be explained below using a preferred embodiment of the present invention.

Figure 1 is a longitudinal side view of a conventional PC panel mounting device, in which a is a PC panel and b is a steel frame. The anchor bolt e embedded and fixed in the PC panel a is inserted into the mounting hole f drilled at the angle d, the washer g is inserted into the head of the anchor bolt e, and the nut h is screwed and fixed.

Fig. 2 is a perspective view of each part constituting the PC panel mounting device of the present invention, in which 1 is an anchor bolt, 2 is a threaded part on its end, 3 is a spherical washer, and 3' is another example, 4 is its spherical part,
4' is another embodiment, 5 is a flat washer, 6 is a nut having a spherical head 7, and 9 is an angle in which a mounting hole 8 is formed.

FIG. 3 is a partial perspective view of the steel frame 11 to which the pedestal 10 is fixed.

Figure 4 is a vertical cross-sectional view showing how the PC panel is installed. It has a structure in which an appropriate number of washers 15 for adjusting the vertical height position are overlapped and fitted. Further, the bolt 13 having the above structure is inserted into the mounting hole 9 provided in the horizontal part of the angle 9, and the washer 16 and the tightening nut 17 are fitted and screwed into the threaded portion 14 of the bolt 13, and the angle 9 is attached to the steel frame 11. It has a configuration in which it is fixedly attached to a fixed pedestal 10. Furthermore, when embedding the anchor bolt 1 in the PC panel A, the periphery of the spherical washer 3 fitted to the anchor bolt 1 may be slightly
The spherical part 4 of the spherical washer 3 is fixed by welding to the anchor bolt 1 to the extent that it is buried in the surface of the PC panel A.
Insert the threaded portion 14 of the anchor bolt 1 into the mounting hole 8 of the angle 9 so that the bolt is in contact with the surface of the angle 9, and the spherical head 7 of the nut 6 is inserted through the flat washer 5.
It is constructed so that the angle 9 is tightened and fixed toward the PC panel A side.

Figure 5 shows the configuration of the mounting device of the present invention.
A vertical cross-sectional view showing the following state of each part when PC panel A causes interlayer displacement.

(5) Actions and Effects As shown in Figure 1, with the conventional mounting device for PC panel a, if interstory displacement occurs in the steel frame b due to earthquakes, wind pressure, etc., the rigidity of the PC panel a itself will be reduced. is strong and there is almost no component deformation, so we cannot expect its followability.In recent years, the rigidity of angle d has also improved dramatically due to the action of reinforcing ribs c, so we cannot expect its deflection, and in the end PC
Although there was a drawback that panel a could not be prevented from being damaged or falling off, the PC panel A mounting device of the present invention is a device that attaches PC panel A to the steel frame 11 with the configuration described above, so there is no interlayer displacement in the steel frame 11. When this occurs, the spherical portion 4 of the spherical washer 3 on the PC panel A side and the spherical head 7 of the nut 6 on the steel frame 11 side contact and hold the angle 9 with their respective small curved surface areas, causing friction. It can move smoothly with less movement, and can move in any direction within 360 degrees, so it can absorb the deformation of PC panel A and fully follow the interlayer displacement of the steel frame structure, and the interlayer displacement that can be followed is For example, if it occurs in the width direction of PC panel A (in-plane direction), and if it occurs from the PC panel A side toward the steel frame 11 (out-of-plane direction). Furthermore, even if vertical displacement occurs in the steel frame structure from above to below, the PC panel mounting device of the present invention allows each of the multiple mounting devices to be freely movable in the vertical direction. It has a sufficient tracking effect. Furthermore, even if the PC panel expands or contracts due to temperature changes, each of the plurality of mounting devices can move up and down to sufficiently follow the changes. Furthermore, the PC of this invention
There is no need to place various movable washers between the angles of the panel, and the distance between the PC panel and the angles can be kept to a minimum, making it possible to use relatively small diameter anchor bolts. This makes it possible to downsize the mounting device, which is economical, and also allows effective use of the indoor area of the structure since the mounting device does not obstruct it. In addition, when installing a PC panel on an angle due to the action of the spherical part of the spherical washer and the spherical head of the nut, the PC panel is guided by each spherical part and tightened at the center of the angle's mounting hole. Tightening work is carried out accurately, leading to improved reliability.Furthermore, this same effect allows for high mobility, which makes it possible to increase rigidity by adding reinforcing ribs to the angles, allowing for larger PC panels.

As described above, when installing a PC panel to a building frame, the PC panel mounting device of the present invention prevents the PC panel from being damaged or falling off due to its own weight, earthquakes or wind pressure, and also prevents deformation of the building frame caused by these forces. It is configured to be able to follow inter-story displacement in both out-of-plane and in-plane directions, reducing the force applied to the PC panel from the frame and preventing damage to the PC panel.Furthermore, the rigidity of the PC panel does not affect the rigidity of the building frame. This is an effective mounting device that will help popularize the PC construction method due to the increase in external wall area due to the rise in the height of buildings.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a conventional mounting device. FIG. 2 is a perspective view of each part constituting the mounting device of the present invention. Figure 3 is a partial slope view of the steel frame. FIG. 4 is a longitudinal sectional view showing the installed state of the present invention. FIG. 5 is a longitudinal cross-sectional view when interlayer displacement occurs in the mounting device of the present invention. a...PC panel, b...steel frame, c...reinforcement rib, d...angle, e...anchor bolt, f...mounting hole, g...washer, h...nut,
A...PC panel, 1...Anchor bolt, 2...
...Threaded part, 3, 3'... Spherical washer, 4, 4'...
Spherical part, 5... Flat washer, 6... Nut, 7... Spherical head, 8... Mounting hole, 9... Angle, 10
... Pedestal, 11 ... Steel frame, 12 ... Reinforcement rib, 13 ... Bolt, 14 ... Threaded part, 15, 1
6...Washer, 17...Tightening nut.

Claims (1)

[Scope of utility model registration request] Pre-casting is a pre-cast product in which the periphery of the spherical part of the fitted curved washer is welded and fixed to the anchor bolt which is buried so as to protrude from the panel surface so that it is slightly buried in the panel surface. A nut having a spherical head is screwed into a threaded part of an anchor bolt inserted into a mounting hole in a vertical part of an angle attached to a steel frame frame, and the spherical part of the spherical washer is connected to the concrete panel. A precast that is constructed so that the angle is held between the small curved surface area of the nut's spherical head. Concrete panel mounting equipment.