JPH0325138A - Mounting structure for wall panel - Google Patents

Abstract

PURPOSE:To prevent an unreasonable force from being exerted on a wall panel and to improve durability and reliability by a method wherein a bolt having the non-continuous region of a screw groove is inserted through the oblong hole of a mounting plate and screwed in the anchor nut of a wall panel. CONSTITUTION:An anchor nut 14 is previously embedded in a wall panel 12, and a mounting plate 17 having a laterally long hole 19 is secured to a pillar by welding and the like. A bolt 18 having the non-continuous region of a screw groove on the head part side is inserted through an oblong hole 19 of the mounting plate 17, and a nut member 20 is joined in a screwed manner with a nut member 20 to screw in the anchor nut 14 of the wall panel 12. The screwing-in limit position of the nut member 20 is regulated by means of the non-continuous region of the screw groove of the bolt 18, and movement of the wall panel 12 is allowed by means of the oblong hole 19 of the mounting plate 17. This constitution enables an unreasonable force to be prevented from being exerted on the wall panel 12 even when the wall panel 12 is changed relatively based on the pillar.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a wall panel mounting structure with improved earthquake resistance.

(Prior art) As a type of wall panel installation and construction, for example, a large number of lightweight aerated concrete panels (hereinafter referred to as rALC panels) are used.
A horizontal wall bolting construction method is known, in which the outer wall of a building is constructed by attaching it horizontally to the building frame.

The outline thereof is shown in FIG. 5, and hook bolts 2 are fixed to each ALC panel 1 in a penetrating state at both left and right ends thereof, and the tips of the book bolts 2 are welded to pillars 3 of the frame. Each of these hook bolts 2 receives a force that mainly acts on the ALC panel 1 in a direction perpendicular to the ALC panel 1.
In order to receive the weight of the panel 1, a support steel member 4 is provided as shown in the figure. This receiving steel material 4 is shaped, for example, by L-shaped steel and has a flat receiving surface, and is welded to the pillar 3 every five ALC panels 1, for example, so that the left and right AL
It receives and supports the lower end surface of the C panel 1.

(Problem to be Solved by the Invention) However, during an earthquake, the building frame and wall panels are displaced relative to each other. However, in the conventional configuration described above, since the pillar 3 and the ALC panel 1 are fixedly attached via the hook bolts 2, an unreasonable force is applied to the ALC panel 1, which may cause cracks depending on the degree of displacement. sometimes occurred. If such cracks occur, rainwater may enter through the cracks, causing serious damage to the building, and the expansion of the cracks may cause dangerous situations such as pieces of wall panels falling. There is a risk.

To avoid such a situation, for example, the following structure can be considered. Anchor nuts are buried in the ALC panel in advance. On the other hand, a mounting plate with a horizontally elongated hole is manufactured, and a bolt is passed through the elongated hole and screwed into the anchor nut of the ALC panel, so that it can be attached to the ALC panel so as to be movable in the long diameter direction of the elongated hole. Fix the mounting plate to the column by welding, etc. This allows the ALC panel to move laterally relative to the column by the length of the long hole, so it can absorb the relative displacement between the column and the ALC panel during an earthquake, preventing unreasonable forces from acting on the ALC panel. can be prevented.

However, with the above configuration, an operator may accidentally tighten the bolt too tightly to the anchor nut. As a result, the mounting plate becomes fixed to the ALC panel with bolts, making it difficult to move as it should be, making it impossible to absorb the relative displacement between the column and the ALC panel during an earthquake. This leads to a situation where cracks occur in the ALC panel.

The present invention has been made in view of the above circumstances.

Therefore, the purpose of this is to secure the movement tolerance of the wall panel in a structure in which the wall panel is movably attached to the frame, to reliably prevent excessive force from being applied to the wall panel due to earthquakes, etc. The object of the present invention is to provide a wall panel mounting structure that can sufficiently improve the durability and installation reliability of the wall panel.

[Structure of the Invention] (Means for Solving the Problem) The wall panel mounting structure according to the present invention uses a bolt having a discontinuous thread groove region on the head side as a bolt for mounting the wall panel. Further, a nut member is screwed onto the bolt, and the mounting plate is sandwiched between the nut member and the head of the bolt such that the bolt and the mounting plate are movable relative to each other in the long diameter direction of the elongated hole. It has certain characteristics.

(Function) Since elongated holes are formed in the mounting plate for attaching the wall panel, and bolts pass through the elongated holes, the wall panel is allowed to move relative to the frame by the length of the elongated hole. With this, even if the wall panel and the frame are displaced relative to each other due to an earthquake or the like, the displacement can be absorbed and no unreasonable force is applied to the ALC panel.

Here, the mounting plate is located so as to be sandwiched between the bolt head and the nut member, and a discontinuous area of the thread groove is provided on the head side of the bolt shaft, and the mounting plate is located between the bolt head and the nut member. Since the screw limit position is regulated by the discontinuous region, as long as the region is set within a predetermined range, the mounting plate can be prevented from being strongly tightened by the bolts.

As a result, no matter how strongly the bolts are tightened, the permissibility of movement of the mounting plate relative to the wall panel is reliably guaranteed.

(Example) An example in which the present invention is applied to a horizontal wall construction method of an ALC panel will be described below with reference to FIGS. 1 to 4.

The overall structure is shown in FIG. As shown in the figure,
Each pillar 11 is constructed using H-shaped steel, and is erected in a line at intervals equal to the longitudinal dimension of the ALC panel 12, which is a wall panel. Among the pillars 11, two through angles 13 forming a pair on the left and right are fixed by welding along the pillar l1 on the exterior surface of the building, and the ALC panel 12 is attached to each pillar 11.
The two ends are passed through a pillar 11 and fixed via an angle 13 in a horizontally elongated state stacked up and down.

Note that the ALC panels 12 stacked as described above
A plurality of panels are made into one block, and receiving members 23, which will be described later, are fixed to the through angle 13 corresponding to the lower surfaces of both ends of the ALC panel 12 located at the lowest stage of each block.

Now, regarding the lowermost ALC panel 12 of each block, stepped fixing plates 16 are fixed by bolts 15 screwed into anchor nuts 14 located on both left and right sides thereof. The tip of the fixing plate 16 is welded to the through angle 13, so that the ALC panel 1
2 is fixed to the pillar 11.

On the other hand, flat mounting plates 17 are attached to both left and right sides of the ALC panel 12 located above the bottom of each block with bolts 18, and the tips of the mounting plates 17 are welded to the through angles 13. This mounting plate 17 has a horizontally long elongated hole 19 as shown in FIG.
is formed, and the bolt 18 passes through it. Also,
As shown in FIG. 1, a spacer nut 20, which is a nut member, is screwed into the shaft portion 18a of this bolt 18, but a thread groove is not formed in a predetermined portion of the shaft portion 18a on the root side. A discontinuous region 21 is provided. Therefore, a gap of a predetermined size is formed between the screwing limit position, which is the position where the spacer nut 20 is inserted into the bolt 18 by the maximum amount, and the bolt head 18b, and the gap size A is defined as It is made to be larger than the sum of the plate thickness dimension 1 of the mounting plate 17 and the plate thickness dimension t2 of the washer 22 fitted to the bolt 18 (A>t++tz).

The receiving member 23 is welded to the through angle 13 with an arcuate convex surface that is convex upward, and the ALC
They are provided, for example, every five stages of the panel 12. Further, although not shown, the vertical and horizontal joints between each ALC panel 12 are filled with a flexible sealant for waterproofing.

In the above configuration, the ALC panel 12 is attached to the mounting plate 1.
7 to the pillar 11 according to the following procedure. First, the shaft portion 18a of the bolt 18 is passed through the washer 22, and then through the elongated hole 19 of the mounting plate 17. and,
Screw the smooth nut 20 onto the shaft portion 18a to the threading limit position.

Thereafter, the mounting plate 17 is attached to the ALC panel 12 by screwing the tip of the bolt 18 into the anchor nut 14 of the ALC panel 12. Then, by welding the tip of the mounting plate 17 to the through angle 13 as shown in FIG. 4, the ALC panel 12 is mounted to the column 11 within the range of the elongated hole 19 in a state allowing movement.

In this state, for example, the pillar 11 of the building is damaged by an earthquake.
If the panel is tilted relative to the panel 12, the bolt shaft portion 18a will move within the elongated hole 19, so the column 11 and
Relative displacement between the LC panel 12 and the LC panel 12 is absorbed. This can prevent the occurrence of cracks due to excessive force acting on the ALC panel 12.

Now, in the above-mentioned work procedure, even if the worker over-tightens the bolt 18 when screwing it into the anchor nut 14, the thread content of the bolt 18 is regulated by the spacer nut 20, so the bolt The mounting plate 17 may be damaged due to excessive tightening of the bolt head 18.
It will not be tightened between it and b. Furthermore, even if the operator tries to screw the spacer nut 20 excessively when screwing the spacer nut 20 onto the bolt shaft 18a, the bolt shaft 18a will have a discontinuous region 21 of the thread groove. Because of this, the amount of movement of the spacer nut 20 is restricted, and a gap is always formed between the screwing limit position and the bolt head 18b. In this embodiment, the gap dimension A is larger than the sum of the thickness t1 of the mounting plate 17 and the thickness t2 of the washer 22 fitted to the bolt 18, so the spacer nut 2
Even if the mounting plate 17 is screwed to the maximum extent, the mounting plate 17 will not be tightened with the spacer nut 20. As a result, in this embodiment, the AL of the mounting plate 17 is
The movement tolerance of the C panel 12 is reliably guaranteed, and even if the ALC panel 12 and the pillar 11 move relative to each other during an earthquake, unreasonable force is prevented from acting on the ALC panel 12. In addition, especially in this example, each A
Since the receiving member 23 that receives the LC panel 12 is shaped to have a convex surface that is convex upward, when the pillar 11 is displaced to be inclined with respect to the ALC panel 12 during an earthquake, etc. The member 23 moves as if rolling against the ALC panel 12, and no unreasonable force is applied to the ALC panel 12 even at the corners of the lower end surface, and damage to the ALC panel 12 is more effectively prevented from this surface as well. It can be prevented.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings. For example, in addition to an embodiment in which an anchor nut is embedded in an ALC panel, a bolt may be passed through the ALC panel and the bolt may be attached to the outside of the ALC panel. Alternatively, the nut may be screwed together. Further, the elongated hole of the mounting plate is not limited to a shape with a closed peripheral edge, but may have a notch shape with an open end on the through-angle side, for example.
．． In this case, by fixing to the through angle, the peripheral edge of the elongated hole becomes substantially closed. Furthermore, the discontinuous region of the thread groove of a bolt is not limited to the one provided by not forming a thread groove in a part as in the above embodiment, but the thread groove is formed continuously and a pin is attached to a predetermined part of the thread groove. A discontinuous region of the thread groove may be provided by installing a stopper such as a stopper.

In addition, for example, it can be applied not only to the horizontal sky construction method but also to the vertical wall construction method in which the wall panels are made vertically long and attached to the beams of the frame, and ALC
The present invention can be modified and implemented in various ways without departing from the scope of the invention, such as being applicable not only to panels but also to mounting structures for precast concrete plates.

[Effects of the Invention] As described above, the present invention allows the mounting plate between the wall panel and the pillar to be allowed to move relative to the wall panel even if the pillar and the wall panel are displaced relative to each other. This prevents excessive force from being applied to the wall panel, causing damage to the wall panel, and reducing the durability of the wall panel and the reliability of its installation. Moreover, the mounting plate is located so as to be sandwiched between the bolt head and the nut member, and the bolt shaft portion is provided with a discontinuous region of thread groove, so that the threading limit position of the nut member is regulated. Because of this, the mounting plate is not held down by the bolts and its movement is not obstructed, which is an advantage in that it is possible to reliably prevent the movement tolerance of the mounting plate from being impaired due to variations in the tightening force of the bolts. It has the following effects.

[Brief explanation of drawings]

Figures 1 to 4 show an embodiment of the present invention, with Figure 1 being a vertical sectional side view of the main parts, Figure 2 being a perspective view of bolts and nuts, and Figure 3 being a perspective view of the entire building from inside. Figure, 4th
The figure is an enlarged perspective view showing the fixing structure of the ALC panel, and FIG. 5 is a partially cutaway perspective view showing a conventional example. In the drawing, 11 is a pillar, 12 is an ALC panel (wall panel),
13 is a through angle, 14 is an anchor nut (nut)
, 18 is a bolt, 1 is a slotted hole, 20 is a flat nut (
Nut member), 21 is a non-shaped area of the thread groove, 22 is a washer, and 23 is a receiving member. 14 Nut Figure 1 20

Claims (1)

[Claims] 1. A mounting plate with long holes is fixed to the wall panel with bolts and nuts, and the mounting plate is directly or indirectly locked to the building frame, thereby fixing the wall panel to the wall panel. In the mounting structure for attaching to a building frame, a bolt having a discontinuous thread groove area on the head side is used as the bolt, and a nut member is screwed onto the bolt to connect the nut member and the head of the bolt. A wall panel mounting structure characterized in that the mounting plate is sandwiched between the bolts and the mounting plate so that they can move relative to each other in the long diameter direction of the elongated hole.