JPS6254752B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clipper crane equipped with a device for switching guide rails for guiding staging when constructing a main tower having diagonal columns.

Various construction methods and devices have been devised for constructing the main towers of large cable-stayed bridges and suspension bridges, but among them, the Kritsupah Crane is the most commonly used method from the viewpoints of safety during construction, economic efficiency, and practical capacity. ing. However, the Kritsupah crane does not have the function of climbing diagonally along the leaning column, so the guide rail for crane creeping up must be installed vertically to the tower body, and if the main tower is tilted, it will not work. This makes it difficult to employ Kritsupakrane. This invention was made with the aim of solving this problem.

That is, the present invention constitutes a supporting ridge that forms a plurality of pairs of engagement recesses through which the guide rails are inserted and engaged with the upper and lower front ends of the staging that is pushed up along the guide rails provided along the tower columns. , and a fixing pin operated by a hydraulic cylinder between the adjacent supporting flange edges on both sides of the upper part, which switches the fixing of the staging to the locking holes provided in the adjacent guide rails by alternately engaging and disengaging the fixing pins. An embodiment thereof will be described below based on the drawings.

Figure 1 shows the arrangement of guide rails B and C with respect to the main tower A that constitutes the leaning tower, and the distance e between the guide rails B and C determined by the oblique angle of the main tower A at the connecting part. exists. By the way 1
is a staging that is raised along the guide rails B and C, and a crane (not shown) is attached to this staging 1. The present invention is provided with a switching device for causing the staging 1 pushed up along the guide rail B to follow the guide rail C, and an example of the configuration thereof is shown in FIGS. 2 to 5. It is shown.

The dimensions of the staging 1 are determined according to the spacing between the main towers A, and the staging 1 is assembled using various steel materials. At the upper and lower front ends of the staging 1, supporting protrusions 2, 2', 3, and 3' are formed to form engagement recesses into which the guide rails B or C are inserted. As shown in FIG. 2, the guide rail B is inserted through the support flange 2, 3, and the guide rail C is inserted through 2', 3', so that the support flange 2, 3 and 2' , 3' is determined by the distance e formed by the guide rails B and C described above.

Incidentally, the upper support flange 2, 2' is designed to connect and fix this portion to the guide rails B, C, and is designed to have a corresponding reinforcement structure, and a switching fixing pin 4 is installed in the intermediate part thereof. is installed. That is, the fixing pin 4 is inserted into one of the pin holes 6, 6' provided concentrically in the frameworks 5, 5' constituting the upper supporting edges 2, 2',
At that time, it passes through the guide rail B or C passing between the frames 5 and 5 or between 5' and 5', and due to this relationship, the staging 1 is fixed to either guide rail. A state in which the staging 1 is fixed to the guide rail B at the bottom of the column is shown as a guide. Note that the switching operation of the fixing pin 4 is performed by transmitting the operation of the hydraulic cylinder 7 to an actuating piece 10 fitted to the fixing pin 4 via a lever 8 and a shaft 9. 8 rotates about a pin 11 as a fulcrum, and the shaft 9 is guided by an elongated hole 13 provided in a support member 12 to reciprocate. It should be noted that the design of the operating mechanism for providing switching operation to the fixing pin 4 may be freely changed.

14, 14' are the respective supporting edges 2, 3, 2',
3' are respectively disposed at the upper front end, and this serves to restrict the movement of the staging 1 in the lateral direction when the staging 1 is fixed to the guide rail B or C. Although the structure is not limited, it is desirable to adopt a structure that allows for easy connection and dissociation. Therefore, in the embodiment, threaded cylinders 15 and 15' which are rotatably supported are provided on the guide rails B and C sides, while the above-mentioned screw cylinders are provided on the respective supporting edges 2, 3, 2' and 3' sides. Cylinder 15,
A pair of left and right screw pins 16, 1 corresponding to 15'
A so-called turnbuckle mechanism is adopted in which the 6' is pivoted so that it can move forward and backward. In other words, the threaded cylinders 15, 15' are installed in advance at predetermined positions on the guide rail side, and the screw pins 16, 16' are attached to the threaded cylinder 1.
5 and 15', first insert them into both inlets of the threaded cylinders 15 and 15', and then rotate the threaded cylinders 15 and 15' to release both threaded pins 16 and 1.
6' are respectively spirally advanced, and finally connect the guide rail B or C and the staging 1. Also, when the threaded cylinders 15, 15' are rotated in the opposite direction, both threaded pins 1
6 and 16' move backward and leave. In this way, the threaded pins 16, 16' are threaded in opposite left and right directions so that they can move relative to each other due to the movement of the threaded cylinders 15, 15'.

Note that 17 in the figure is a slide plate attached to the front of the recess of the lower end support flange 3, 3', and when the staging 1 is pushed up, this comes into contact with the back surface of the guide plate B or C to facilitate sliding. .

This invention has a structure as described in the embodiments above, and the clipper crane is guided from the base of the tower column to the upper part of the guide rail B in one catching-up operation, and then the crane is moved to the next guide rail C. When the positions of both are determined, the fixing pin 4 is activated and the connecting mechanism 1 is
4, and at this time the clipper crane is already in a position to be pushed up using the inner guide rail C as a guide, and the operation is easy. As a means of hoisting the Kritsupah crane to a predetermined position, the purpose can be achieved by attaching a temporary lifting rack or the like to the top end of the erected tower pillar. As described above, according to the present invention, the function of a clipper crane can be exhibited without any problem even when constructing a main tower having a slanted column, and its effects are great.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention.
The figure is a front and side view showing how the guide rail is installed along the diagonal pillar, Figure 2 is a front view showing the main parts of the device, Figure 3 is a view from the same side as in Figure 2, and Figure 4 is a view from the same side. FIG. 5 is a side view. A is the main tower, B and C are guide rails, 1 is staging, 2, 2', 3, 3' are supporting flange, 4 is a switching fixing pin, 7 is a hydraulic cylinder, and 14, 14' are a connecting mechanism.

Claims (1)

[Claims] 1. Regarding guide rails consisting of a plurality of guide rails that are installed vertically parallel to each other with different widths at the upper and lower parts, and with the upper and lower parts partially wrapped, the guide rails are The upper guides are formed by forming engaging recesses between the pair of supporting protrusions on both sides of the front end surface of the staging to be moved up and moving along the respective guide rails, through which the guide rails having different widths are individually inserted. A fixing pin is installed at the upper position and the lower position, and each guide at the upper position removably holds a fixing pin for locking the staging to the locking hole provided in each guide rail passing through the guide. A pin hole is provided concentrically through each supporting flange, and a fixing pin, which is held by the pin hole between adjacent guides located on both sides, is always positioned on either one of the guides and locked to the guide rail. Furthermore, each upper and lower guide is provided with a switching device that can be moved left and right, and each of the upper and lower guides has a connection for regulating the lateral position with respect to the guide rail that can be adjusted in forward and backward movement and protrudes from above each support ridge on both sides. A clipper crane equipped with a guide rail switching device that is equipped with a mechanism.