JPS6031983B2 - Sliding bearing of steel truss - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sliding support for a steel truss that is applied to the steel truss traveling method, which is a construction method suitable for spanning the steel roof of a large space such as a gymnasium.

In the above-mentioned traveling construction method, one side of a large space, which is within the capacity range of a crane from outside the building, is used as a lifting and connection zone for the steel truss, and one unit la of the steel truss is attached to the pre-constructed frame A as shown in Figure 1. The calendar is mounted on the upper end of the girder side of one side, and only two units are slid along the running rail 3 laid on the beams 2, 2 in the direction of the girder.
Next, the second unit lc is remounted in the empty space at the upper end on the gable side, and these are connected by steel frame members 4 on the scaffolding 5 formed only on the gable side. and assemble 1 unit lb between both units la and lc) Total 3
A unit is formed, and this is slid between two units, and a third unit is inserted into the empty space at the upper end of the gable side, and this is connected to the second unit lc by a steel member, and the following is done. By repeating sliding and connecting in sequence, units la...
. . le are connected and the steel frame roof B is hung horizontally as shown in Fig. 3.

The traveling construction method involves assembling large-scale temporary shoring and work scaffolding under the entire roof of the substructure, and assembling the steel frame on the work scaffold, and the method of assembling the steel frame in advance and lifting it up. Compared to push-up construction methods, this method has advantages such as the scarcity of temporary scaffolding, reduced construction costs, improved safety and construction accuracy, and shortened construction period), and can be constructed even when non-dimensional trusses or the frame is made of RC columns. It can be said that it is sufficiently effective.

The present invention proposes a sliding bearing part for a steel truss that is suitable for carrying out the above-mentioned traveling construction method. By fixing a shaped steel rod and using it as the movement shoe of the unit and the support pin shaft of the structure, it improves the workability and work safety of the steel roof structure that is constructed by combining steel truss units. The object of the present invention is to satisfy the mechanical properties of the pin support part as a structure.

Hereinafter, the present invention will be explained in detail based on the drawings showing specific examples of implementation. As shown in Fig. 4 and Fig. 5, the sliding bearing c has a large diameter cylindrical shape at the 1 unit bearing part (lower end) of the steel truss, and is made of Teflon or the like on the outer periphery of at least the lower half. Sliding material 6a with a small coefficient of friction
A steel beam 6 formed by pasting is fixed by welding toward the middle of the unit 1, and this is laid on the beams 2, 2 in the girder direction of the fat body A that has been constructed in advance. Rail 3,3
The steel rods 6 are connected to each other so as to be slidable in the longitudinal direction, and the steel rods 6 are used as moving shoes of the unit and a support pin shaft as a structure.

In this case, the above-mentioned steel beams 6 are preferably fixed in pairs at the front and rear ends of each unit 1 in the middle direction, as shown in FIG. It is formed to a diameter that satisfies the mechanical properties when used as a pin shaft.

On the other hand, as shown in FIG. 8, channel steel is used as the traveling rail 3, and in this rail,
The diameter 1 of the steel rod 6 is preferably larger than the diameter 1 of the steel rod 6, and the steel rod 6 is fixed so that the steel rod 6 can rotate in the cross-sectional direction.

Moreover, this running rail 3 is coated with a sliding material 3 having a low coefficient of friction, such as Teflon, on the inner surface of the part that contacts the steel rod 6.
a... are installed as shown in FIG. 8 to further improve the sliding of the steel beam 6.

In this way, the steel rails 6 are attached to the traveling rails 3, 3.
. . . is moored, one unit is moved to the upper end of the gable side of one side of the frame A, and as shown in FIG. 4, it slides along the traveling rail 3 by the traveling traction device 7,
After sliding the specified length, next place the second unit on the upper end of the gable side that has become the chamber, and combine this unit with the above one.
The units are connected by steel members as described above, and then these are slid by the traveling traction device 7,
In the following steps, the steel frame roof B is erected in the same manner as described above. In this case, the steel rods 6 serve as moving shoes, and the steel rods 6 are equipped with sliding bridges 6a. In addition, since the cross section is circular and the contact surface with the traveling rail 3 is very small, the sliding materials 6a and 3a are installed as described above). Movement will be smooth.

After the unit 1 is repeatedly slid and connected to the predetermined position as described above, each unit is fixed to the frame A, but according to the present invention, according to the present invention, as shown in FIGS. As shown in FIG.
The base plates 8, 8, . . ., formed in
The above-mentioned steel rods 6 are arranged on both left and right sides and fixed on the beam 3, and are rotatably fixed by being supported from the cross-sectional direction of the steel rods 6 by the arcuate bearing surfaces 8a.

Further, as shown in FIG. 7, the shafts are fixed in all directions by welding or the like to fixing members 9, 9 made of, for example, L-shaped steel in the traveling rail 3 so as not to move. In this),
As shown in FIGS. 7 and 8, the support plate 8 is formed by attaching an arcuate plate 8c to the inner end of the support plate main body 8b. In addition, the arcuate support surface 8a is formed to have a curvature that is substantially equal to or slightly larger than the outer peripheral surface of the steel rod 6, so that the steel rod 6 can suitably rotate as a support pin shaft of the structure. It's like this.

On the other hand, as shown in FIG. 9, the fixing member 9 that prevents the steel twill 6 from moving in the vertical direction is a main body 9a made of L-shaped steel.
A short shaft 9b is integrally welded to the center of the inner surface of the holder.
Thus, the steel rod 6 is also provided with recesses 6b, 6b having a diameter larger than the diameter of the short axis 9b symmetrically at the center of both end faces in all directions, and the fixing members 9, 6b are provided in the recesses 6b, 6b, respectively. 9, and weld the fixing members 9, 9 to the running rail 3 as shown in FIG. 7 so that the steel rod 6 can rotate and not move in the direction. It is recommended to fix it to

This is convenient because upward movement of the steel rod 6 can also be prevented. The steel rod 6 may be fixed as described above, but if the beam 2 is made of reinforced concrete, a concrete or mortar layer 10 is placed on both left and right sides of the running rail 3 as shown in FIG. It is preferable to cast the rails 3 to increase the connection strength between the traveling rail 3 and the beam 2, that is, the frame.

As shown in FIG. 4, the traveling traction device 7 in the illustrated example is formed by pivoting a hanging tool 7c to the end of the output shaft 7b of a double-acting jack 7a so as to be rotatable in the vertical direction. There is.

When towing the unit using this traveling towing device 7, a plurality of anti-cabins 11a are protruded at predetermined intervals on both the left and right sides of the traveling traction device 7. The counter rails 11 are arranged in parallel as shown in FIG. 4 and FIG. When the hanging jig 7c is moved forward, the inclined surface 7c' of the front end of the hanging jig 7c comes into contact with the anti-bin 11a, so that the hanging jig 7c is moved forward.
c rotates upward and climbs over the anti-cabin 11a, and then the anti-cabin 11a and the neck stopper 7c'' recessed at the rear of the inclined surface 7c' stop each other, and then the output shaft 7b is moved backward. By doing so, a reaction force is applied to the counter-bin 11a to slide one unit.

In this way, the traveling towing device 7 tows the unit in a shingle-catching manner. As explained above, according to the sliding bearing of the steel truss according to the present invention, the large diameter steel rod 6 has the sliding material 6a attached to the outer peripheral surface.
is fixed to the support part of the steel truss unit, and this is configured to serve both as a moving shoe for the unit slide and as a support pin shaft for fixing the unit. In the case where the steel roof B is erected by sequentially sliding and connecting them on a belt conveyor system along the traveling rail 3 laid on the top,
By engaging the steel rod 6 with the running rail 3, the contact surface between the sliding member 6a and the running rail 3 is small, so that the steel truss unit can be slid smoothly and can be slid to a predetermined position. After that,
By making the steel rod 6 rotatable from the cross-sectional direction by the support plates 8, 8, and fixing it by preventing movement in all axial directions by the fixing members 9, 9, the steel rod 6 can be installed in a large-scale structure. It can serve as a bearing pin shaft and satisfy the mechanical bearing characteristics of the structure. Therefore, it is possible to implement the to-labeling method and slide the steel truss unit using a small power device. Since it can be fixed as it is after sliding, there is no need to remove temporary members, which improves construction efficiency, economy, safety, etc., and shortens the construction period. It has the advantage of being applicable to construction methods.

In addition, since the steel bar 6 is equipped with a sliding material 6a, smooth rotation can be obtained not only when used as a moving shoe for the unit, but also when used as a support pin shaft. Also, it can be fixed by the support plates 8, 8 and the fixing members 9, 9, and can be implemented simply and easily at low cost.

[Brief explanation of the drawing]

Figure 1 is a side view showing the sliding and connected state of the steel truss unit in the steel truss traveling construction method.
Figures 2-A are slide flowcharts of each unit in the same construction method, Figure 3 is a block diagram of a steel frame roof in the same construction method, and Figure 4 is a sliding construction method using the sliding bearing of the steel truss according to the present invention. Figure 5 is a side view of the unit in a sliding state, Figure 5 is a side view of the support, Figures 6 and 7 are front and side views of the support in a fixed state, and Figure 8 is a side view of the support. Fig. 6 is an enlarged front view, Fig. 9 is a side view showing the iron rod and the axial fixing member in the same bearing part, and Fig. 10 is a beam showing another example of the fixed state in the same bearing part. FIG. A...Structure, B...Steel roof, 1...
... 1 unit of steel truss, 2 ... Beam, 3 ... Traveling rail, 6 ... Steel bar, 6a ... Sliding material, 8
...Bearing plate, 8a...Circular support part,
9...Fixed village. /Gata Carp/Kata Geki/Yujime Mushio A Geki/Tata Geki/Taso's Evening? Koji Gaji Koji/Game Sardine/Mumyoshu

Claims (1)

[Claims] 1. When constructing a steel frame roof in a large space by sequentially sliding one unit of the steel truss from the upper end of the gable side of one side of the frame along a traveling rail that has been laid in advance on the beam in the direction of the girder, and connecting these units. This is a sliding bearing for a steel truss, in which a steel rod is fixed to one unit of the steel truss in a cylindrical shape so that it can also be used as a support pin shaft, and a sliding material is attached to the circumference. This is slidably engaged with the traveling rail to form a movable shoe, and after sliding, it is supported from the cross-sectional direction by a support plate having an arc-shaped support surface, and is rotatable in the front-rear direction. A sliding bearing for a steel truss, characterized in that the sliding bearing is fixed on the beam to prevent movement thereof, and is used as a bearing pin shaft.