JPH042273Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a temporary installation device for telescoping columns in civil engineering and construction, where multiple telescoping columns at a temporary location are stretched and held at once, and then moved to the next location and similarly propped up. This allows for efficient temporary installation of a large number of supports by repeatedly performing temporary installation.

For example, when constructing a concrete slab by pouring concrete over buried formwork, it is necessary to push up and support the flexure of the central part of the buried formwork with supports. The present applicant has developed a patent application (Patent Application No. 148053/1984) that not only supports the deck by pushing back against deflection, but also pushes it up extra to support it and improves the internal stress distribution of the floor slab when the pillars are removed. In some cases, the difference in support reaction force between vertical and horizontal beams is reduced, such as in the ``concrete slab construction method using buried formwork''. Since a large number of supports were used for the wide floor slabs, it took considerable effort and time to temporarily erect them one by one and then remove them as well. The purpose of this invention is to save labor and time. First, to give an overview, it consists of a machine frame in which multiple column pipes are held upright on the outer periphery of a wheeled underframe, and an elevating column whose lower part is slid together and whose upper end is a pushing end; a hydraulic cylinder whose cylinder rear part is connected to the lower end of each elevating column, and whose piston rod tip can pass through the underframe and pressurize the floor or ground; Upper and lower connecting members of the temporary telescopic columns are provided, which protrude from the outer surfaces of each of the above-mentioned elevating columns and column pipes, and the machine frame can be moved to connect the respective elevating columns and column pipes to the temporary positions of the upper and lower parts of the above-mentioned telescopic columns. The upper end of each telescoping column is raised and held at a required height by the fluid pressure cylinder, and after the height of each telescoping column is fixed, the connection is released and separated. This is a temporary device for telescopic struts. Of course, the same thing should be done when the pillars are removed.

Next, embodiments of this invention will be described with reference to the drawings.

Figures 1 and 2 show the device according to this invention being used for temporary construction of supports for buried formwork made of PC concrete. In the direction along the longitudinal beam 2 of the column 1 shown by the chain line, the buried formwork 3 made of PC concrete in the form of a corrugated plate, which was previously developed by the applicant, is laid between the horizontal beams (not shown). Cast-in-place concrete C is placed on top of this as shown by the chain line to form the floor slab.

Before pouring the cast-in-place concrete C, beam frames 5 are used to evenly push up and support the three groups of buried formwork placed in two places near the center in the longitudinal direction. The four intersections of the vertical and horizontal members of the beam frame 5 are pushed up and supported by the four telescopic columns 4, and the construction device of this invention works to erect the four columns 4.

As mentioned above, the construction device of this invention has a framework formed by a machine frame 9 holding four column pipes 8 at the outer periphery of an underframe 7 with wheels 6, in this example, at the four corners. There are four elevating columns 10 whose lower parts are slid into each column tube 8 and whose upper ends are pushed up. In addition, in Figure 1,
In order to show the column tube 8 which also serves as the column of the machine frame 9, the left telescopic column 4 that hides it has been removed from the drawing. The four telescopic columns 4 independently support the beam frame 5 and are left until the cast-in-place concrete C hardens, and the height can be adjusted and fixed.
It's not something you push yourself up against.

Figures 1 and 2 show the machine frame 9 of the temporary device of this invention being moved so as to fit between the four telescopic columns 4 placed in the temporary position, and each of its elevating columns 10 and column pipes 8 are connected adjacent to the upper and lower parts 4a, 4b of each telescopic column 4, and by raising each elevating column 10, the upper end of each column 4 is raised and held at a required height.

Each elevating column 10 and column pipe 8 have a temporary telescopic column upper and lower connecting member 11 protruding from their respective outer surfaces. The upper part 4a of the support column also rises as it rises. In this case, the connecting member 11 is
No strong power transmission is required, just the upper and lower parts of the column 4
It is simply bolted to the same-shaped connecting members on the a and 4b sides. Therefore, the upper end of the elevating column 10 is aligned with the upper end of the column 4 to push up the beam frame 5, so that the load is not applied to the connecting member 11 too much. The connecting member 11 may be configured to be capable of transmitting strong power so that the upper end of the elevating column 10 does not touch the beam frame 5 and is pushed up only by the upper portion of the column 4a.

The elevating and lowering drive mechanism of the elevating column 10 extending upward from the column tube 8 will be explained with reference to FIG. Although it looks similar to a general telescopic column, the rear part of the cylinder 12a is connected to the lower end of the lifting column 10, and the tip of the piston rod 13 passes through the underframe 7 to form a fluid pressure cylinder 12 that can pressurize the floor F or the ground. Because of this, the elevating column 10 can exert a strong upward force. FIG. 3 shows the rod 13 in a retracted state. Since the fluid pressure inlet 14 of the cylinder 12a moves up and down facing the long vertical slot 15 of the column pipe 8, the fluid pressure hose 16, which is simply connected via a coupler, moves up and down along the slot 15. obtain.
In this embodiment, the hydraulic cylinder 12 cannot return by itself, and the cylinder 12a is lowered by its own weight onto the lifting column 10, and the rod 13 is pulled up by the coil spring 17. The coil spring 17 is attached to the underframe 7
It is inserted between the side support plate 18 and the rod 13 side support seat 19 and constantly pushes up the rod 13. The adjustment nut 20 with a handle fitted into the threaded part at the bottom of the rod 13 is
The height to which the rod 13 is pushed up is limited by the spring 17, and the distance between the lower end of the rod 13 and the floor F when it is pulled up is adjusted.

Fluid pressure may be maintained to maintain the raised lifting column 10 in position. However, in this embodiment, like a general telescopic column, several stages of through-holes 21 are made in the elevating column 10 (pipe), and the pin hole of the bag ring 23 rests on the handle nut 22 fitted to the threaded portion of the upper end of the column tube 8. 24 to temporarily fix the height of the lifting column 10, so that the fluid pressure can be released.
The telescopic support 4 is a conventional product that has a similar through hole 21', a handle nut 22', and a bag ring 23' so that its height can be temporarily fixed.

This example is used in a field where dozens of four pillars each are temporarily installed in a section divided by vertical and horizontal beams in order to create a floor slab that will be a large floor surface of a warehouse etc.
Although the arrangement of the telescopic columns 4 is almost constant, the mutual spacing of the column tubes 8 can be changed in two stages so that the spacing can be used even if the spacing is slightly different. That is, as shown in FIG. 2, the upper and lower cross members 9a, 9a of the machine frame 9, which determine the interval between the two column pipes 8, are made extendable and retractable, and the brace links 9b, 9b and the hydraulic cylinder 2
5, a unique machine frame 9 is created in which when the rod of the cylinder 25 is pushed out, the mutual spacing between the column tubes 8 widens as shown in the figure, and when it is retracted, it narrows.

The major feature of the temporary device of this invention is that it prepares a number of column pipes 8 and lifting columns 10 that match the number of target telescopic columns 4, and lifts and lowers all of them at once.An example of the fluid pressure circuit diagram is shown below. Shown in Figure 4. 26 is a distribution pipe,
27 is an operation valve, 28 is a pressure gauge, and 29 is a relief valve.

Although one embodiment has been described above, this invention can be widely varied and applied according to the known techniques of mechanical designers depending on the implementation conditions without changing its gist. For example, it is easy in terms of design to make the column tube 8 separate from the column of the machine frame 9 so that the position of the column tube 8 on the underframe 7 can be changed as appropriate.

This idea breaks the conventional wisdom of temporarily installing a retractable support for each tree and removing it one by one after curing, and opens the way to temporary installation and removal of several trees all at once. Column pipes and lifting columns are erected on the underframe in accordance with the temporary positions of each telescopic column, and are connected adjacent to each column using upper and lower connecting materials. When each column is pushed up with fluid pressure, each column all at once to a temporary height.
Therefore, once the height of each column is fixed, it is immediately moved to the next group of columns, making it possible to carry out temporary installation and dismantling operations extremely efficiently with a single temporary installation device.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of this invention in operation, Fig. 2 is a side view thereof, Fig. 3 is an enlarged sectional view of the column pipe and lifting column, and Fig. 4 is a fluid pressure circuit diagram. It is. 9... Machine frame, 10... Lifting column, 11... Connection member, 12... Fluid pressure cylinder.

Claims (1)

[Scope of utility model registration request] A machine frame in which a plurality of pillar pipes are held upright on the outer periphery of an underframe with wheels, a lifting column whose lower part is slid into each of the pillar pipes and whose upper end is a push-up end, and a lower end of each lifting pillar. A hydraulic cylinder that connects the rear part of the cylinder and whose piston rod tip can pass through the underframe and pressurize the floor or ground, and an upper and lower connecting member of the telescopic column that protrudes from the outer surface of each of the elevating column and column pipe. A temporary device for a telescopic column, which is characterized by: