JPH0447747B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a structure for attaching panels constituting the outer wall of a building to a steel beam.

(Prior Art) Conventionally, as shown in FIGS. 5 and 6, a joint hardware 102 is attached to a steel beam 100 in order to attach a panel constituting a wall slab such as a precast concrete slab to the steel beam. A long nut 104 extending in the vertical direction is fixed to the long nut 104.
A bolt 106 extending upward is screwed into the
A long nut 104 is attached to the lower end of the upper panel 108.
A hole 109 for receiving the bolt 106 and an abutment surface 110 for the bolt 106 are provided. Furthermore, fitting hardware 1
02, a bolt (push bolt) 116 that abuts on the embedded plate 114 provided on the inner surface of the upper end of the lower panel 112 and the lower panel 1
A bolt (pulling bolt) 120 is attached which is screwed into a socket 118 embedded in the upper end of the joint 102 and is movable up and down with respect to the joint metal fitting 102.

This conventional mounting structure is typically applied at two laterally spaced points with respect to the panel surface, with the upwardly extending bolts 106 carrying the entire weight of each panel, and the elongated nuts 104, push bolts 116 and The tension bolts 120 support the panel below and above the panel so that it does not fall.

According to the conventional mounting structure, when elastic deformation occurs in the structures constituting the building due to wind pressure or seismic force acting on the building, each panel is screwed into the long nut 104 of one of the mounting structures. bolt 1
06 and a contact surface 110 formed at the lower end of the panel as a fulcrum, it is possible to perform a tilting movement in a plane parallel to the panel.

However, during this tilting movement, the push bolts 116 fixed to the steel beam 100 and the lower panel 11
There is a drawback that a loud and unpleasant sound is generated for a long time due to the friction between the pull bolt 120 and the embedded plate 114 provided on the pull bolt 120.
Stresses that cannot be analyzed by structural calculations occur in
It was not sufficient in terms of ensuring safety.

(Objective) Therefore, an object of the present invention is to obtain a panel mounting structure that reduces unpleasant noise and shortens its occurrence time, and is highly safe.

(Structure) The present invention is an attachment structure for a panel to a steel beam, and includes a plate fixed to the upper end of the lower panel and provided with a first hole and a second hole, and a plate fixed to the upper end of the lower panel and the lower end of the upper panel. a dowel provided in the section and extending downward through the first hole; and a dowel fixed to the steel beam;
It includes a long nut extending upward through the second hole and a bolt threaded into the long nut, extending upward and abutting the lower end of the upper panel.

(Operations and Effects) The panel mounting structure according to the present invention is preferably applied to two locations spaced apart in the width direction of the panel.

According to the invention, the weight of the upper panel is carried by the steel beam via bolts threaded into elongated nuts passing through second holes in the plates of the lower panel. The upper panel is horizontally constrained by the plate defining a first hole through which a dowel can pass, and the lower panel is constrained horizontally by the plate defining a first hole through which a dowel can pass.
It is restrained in the horizontal direction by a long nut passing through the hole.

When wind pressure or seismic force acts on a building, both the upper and lower panels tilt in almost the same way, using the contact point between the bolt of the mounting structure and the panel as a fulcrum, so the upper and lower panels tilt during the tilting motion. The change in the mutual spacing between both panels is very small compared to the change in the mutual spacing between each panel and the steel beam. Therefore, the relative movement distance of the dowel of the upper panel with respect to the plate of the lower panel is also very small. Therefore, the scraping noise generated between the plate and the dowel is small, and the sounding time is short.

Furthermore, by using the combination of the dowel and plate as a means for restraining the panel in the lateral direction other than the long nut, it is possible to eliminate the use of the conventional tension bolt, which involves the generation of unanalyzable stress. Thereby, a highly safe mounting structure can be achieved.

(Example) The features of the present invention will become clearer from the following description of the illustrated embodiment.

Referring to FIG. 1, a lower panel 10 and an upper panel 12 of plates, such as pre-cast concrete plates, are mounted parallel to each panel in a lateral direction (panel thickness The mounting structure 14 is attached to a steel beam 16 made of H-shaped steel extending horizontally perpendicular to the width direction or in the width direction of the panel. In order to avoid duplication of explanation, one of the mounting structures will be described below, unless otherwise specified.

The mounting structure 14 includes a plate 18 secured by recessing to the upper end of the lower panel 10, as shown in detail in FIGS. 2 and 3.

The plate 18 can be made of a rectangular steel plate, and a portion of the plate 18 projects parallel to and at a distance above the joint hardware 20 fixed to the upper flange of the steel beam 16. The joint hardware 20 is made of H-shaped steel and is arranged at right angles to the steel beam 16 so as to partially protrude toward the upper end of the panel 10. The plate 18 has first holes 2 spaced apart in the lateral direction for receiving dowels 26 as described below.
2 and a second hole 24 for receiving a long nut 28, which will be described later.

The upper panel 12, which is placed directly above the lower panel 10, has a lower panel 10 at its lower end.
A thick wall portion 12a is formed to project inward from the inner surface of the plate, and a dowel 26 extends downward from the thick wall portion through the first hole 22 of the plate.
is provided. The base of the dowel 26 is connected to the thick wall portion 12a together with the anchor bar 27 connected thereto.
embedded in. To facilitate insertion of the dowel 26 into the first hole 22, the first hole 22 for receiving the dowel 26 is formed with a diameter that gradually decreases from its upper edge to its lower edge. Furthermore, the diameter of the lower edge is set to be slightly larger than that of the dowel 26.

A long nut 28 extending upward through the second hole 24 of the plate is fixed to the joint hardware 20 by welding, and a bolt 30 is screwed into the long nut. The bolt 30 supports the upper panel 12 with its head abutting against the horizontal surface of the thick wall portion 12a. The second hole 24 is a large-diameter blind hole to facilitate fitting with a long nut 28 when the panel 10 is attached. The distance between the upper end of the panel 10 and the fitting 20 is determined by welding a washer 48 to the plate 18, which is fitted into the long nut 28 after positioning the panel 10, as will be described later regarding the installation of the panel 12. determined. The long nuts 28 and bolts 30 can also be attached directly to the steel beam 16.

As is clear from FIG. 1 and the foregoing, each panel has a
Respectively, a plate 18 and a dowel 26 are provided, with the dowel of the upper panel being received in a first hole in the plate of the lower panel between the upper and lower panels.

When a structure including steel beams undergoes elastic deformation due to wind pressure, seismic force, etc., each panel can tilt around the point of contact between its lower end and a bolt screwed into a long nut. . When this tilting movement occurs in the lateral direction, the panel tilts about the abutment point at one of the two locations where the mounting structure is located. At this time, the lower panel 10
The change in the spacing between and the upper panel 12 is very small. Therefore, the amount of relative movement between plate 18 and dowel 26 is also very small. Therefore, the magnitude of the unpleasant noise generated due to the friction between the plate 18 and the dowel 26 is small, and the time for its occurrence is short. Further, the external force acting in the direction perpendicular to the lateral direction, that is, the direction perpendicular to the panel surface, is applied to the panel 1.
An external force acting on the upper half of the panel 12 is transmitted to the joint hardware 20 and the steel beam 16 via the plate 18 and the long nut 28, and an external force acting on the lower half of the panel 12 is transmitted to the dowel 26, the joint hardware 20 and the steel beam 16. Joint hardware 20 and steel beam 16 via long nuts 28
is transmitted to.

Attachment of the panel to the steel beam is performed, for example, after the lower panel 10 is installed in a predetermined position.
2 can be installed as follows.

First, the bolt 30 provided on the joint hardware 20 of the steel beam is turned to adjust the level of its head.

Next, by suspending the panel 12 placed above using a crane or the like and gradually lowering it, the dowel 26 of the panel 12 is inserted into the first hole 22 of the plate 18 of the panel 10, and the panel 12 is It is placed on the head of the bolt 30 on the horizontal surface of the thick portion 12a.

Since the diameter of the lower edge of the first hole 22 and the outer diameter of the dowel 26 are approximately equal, the dowel 26
When the insertion into the first hole 22 is completed at the two locations, the positioning of the panel 12 is also done at the same time. Incidentally, each panel is formed with relatively high precision and accuracy through factory production with the plate and the dowel fixed. However, the distance between the pair of dowels at the two locations on each panel is not always within a predetermined dimensional error range. In order to ensure reliable insertion of the dowel into the first hole in such a case, as shown in FIG. Preferably a hole. Thereby, it is possible to cope with an excessive dimensional error between the pair of dowels.

When the dowel 26 is inserted into the first hole 22 in this manner, the positioning of the panel 12 is completed at the same time, and the entire weight of the panel 12 is loaded onto the pair of bolts 30 at the two locations. An angle steel material 32 is embedded with one side exposed in the horizontal surface where the bolt 30 comes into contact for reinforcement, and an anchor material 34 that contacts the angle steel material 32 is embedded in the thick portion 12a.

Next, to prevent the panel 12 from falling down, its upper end 12b (FIG. 1) is temporarily fixed to a steel beam 17 (FIG. 1) located nearby. Since the members used for this fixing and their arrangement positions are the same as those at the upper end of the lower panel 10, the description regarding the panel 10 will replace the description regarding the panel 12.

Referring to FIGS. 2 and 3, panel 10
A socket 36 that opens toward the joint hardware 20 and a plate member 38 having a hole that matches the open end of the socket are embedded in the upper end, and a plate member 38 is embedded into the joint hardware 20.
A plate member 40 facing the panel 10 and having a hole aligned with the hole of the plate member 38 is attached to the plate member 0 . The panel therefore has bolts 4
2 is passed through from the plate member 40 to the plate member 38 and screwed into the socket 36, thereby temporarily fixing it to the steel beam. The distance between the panel and the steel beam 16 is adjusted by changing the amount of tightening of the bolts 42. An anchor member 44 is embedded in the upper end of the panel to reinforce the plate member 38.

After temporarily fixing the panel 12, a long nut provided on the steel beam 17 and constituting the mounting structure 15 (FIG. 1) is fixed to a plate fixed to the upper end of the panel 12. In this case as well, for the same reason as above, the explanation regarding the panel 10 will be replaced with the explanation regarding the panel 12.

That is, a sliding member 46 such as a stainless steel sleeve is fitted around the long nut 28, a washer 48 is fitted around it, and then the washer 48 is welded to the plate 18. The sliding member 46 has an anti-friction effect on the edge of the hole in the washer 48. The welding of the washer 48 holds the panel from falling over, and the bolt 42 is then removed. In this way, the installation of the panel 12 is completed.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of the panel and the steel beam schematically showing the state in which the panel is attached to the steel beam using the mounting structure of the present invention, and Fig. 2 is a partial vertical sectional view showing the mounting structure of the present invention in detail. , FIG. 3 is a partial longitudinal cross-sectional view taken along line 3--3 of FIG. 2, FIG. 4 is a schematic plan view of the upper end of the panel, and FIGS. FIG. 4 is a partial longitudinal sectional view of a conventional mounting structure similar to FIG. 3; 10, 12... Panel, 14, 15... Mounting structure, 16, 17... Steel beam, 18... Plate,
20... Joint hardware, 22, 24... First hole and second hole, 26... Dowel, 28... Long nut,
30...Bolt.

Claims (1)

[Claims] 1. A structure for attaching a panel to a steel beam, which comprises a plate fixed to the upper end of the lower panel and provided with a first hole and a second hole, and the lower end of the upper panel. a dowel fixed to the steel beam and extending downward through the first hole;
A panel mounting structure comprising: a long nut extending upwardly through a hole; and a bolt screwed into the long nut, extending upwardly and abutting a lower end of the upper panel. 2. The mounting structure according to claim 1, wherein the plates are arranged at two locations on the lower panel at intervals, and the first hole in one of the plates is an elongated hole.