JPH0384170A - Bearing trestle for pipe support for timbering - Google Patents

Abstract

PURPOSE:To enable an unskilled labor to execute the work simply and surely by a method wherein peripheral edge of a circular opening on the lower end of a pipe support is slidably attached to a spherical or conical surface of the subject device, and the bottom face thereof is made to be such structure that coefficient of friction against the bearing surface and the foundation surface can be heightened therewith. CONSTITUTION:A bearing trestle 5 for a pipe support A is installed to a con struction foundation D and the pipe support A, being made tilted at a specified angle, is placed thereon so that a circular opening 1a on the end thereof covers a bearing face 5a of the trestle. Then a beam 7 is fitted between holding members 11 and 11 that are attached to the upper end of the pipe support A for holding the beam from both sides, and a rail 8 is laid thereon. A wedge 15 is then driven into wedge holes 11a and 11b, bestriding both of the holes, and the beam 7 and the rail 8 are fixed to the beam-fixing device 6. Then a joist 9 is nailed on the rail 8 and plywoods 10 are placed thereon, completing a form C therewith. Thereby work can be executed simply, but surely and the lower end of the pipe support A can be installed steadfastly to the construc tion foundation D.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Field of Application) The present invention provides a method for lowering a support having an inclined bottom surface, such as a formwork for pouring a sloped roof made of reinforced concrete. When installing a pipe support (steel pipe support) that is supported from the side on a construction foundation in an inclined state corresponding to the above-mentioned sloping bottom surface, the conventional complicated fixing work such as wedging and nailing can be avoided. This invention relates to a support frame for a pipe support for shoring, which is configured so that the erection work can be easily and reliably performed without any unnecessary work.

(Prior Art) FIG. 7 is a diagram illustrating a conventional shoring method in which a formwork 21 is supported by a plurality of pipe supports A in order to cast a sloped roof 20 made of reinforced concrete.

In this case, the pipe support A is erected obliquely on the construction base 22 as shown in the figure, taking into account that the formwork 21 is inclined.

For this purpose, a receiving plate 2 is welded to the upper end of the pipe support A.
3 and the formwork 21, and between the base plate 24 welded to the lower end of the pipe support A and the construction base 22, wedge-shaped gaps are created, respectively.

Therefore, in addition to inserting wedges 2s in these gaps, the receiving plate 23
and the base plate 24 through the formwork 21 through the nail holes provided therein.
and fixed to the construction base 22 by nailing, respectively.

However, in actual work, it is almost rare to make a wedge 25 with an accurate angle, and there are many cases where wedges 2s with an appropriate angle are inserted as appropriate. There is a high possibility that an accident will occur in which the 2S comes off and one of the ground planes of the base plate 24 is subjected to concentrated stress and becomes distorted and collapses.

In order to prevent this collapse accident, in most cases, posture maintaining means have been taken, such as connecting adjacent pipe supports A and A to each other with horizontal connecting members or wires.

(Problem to be Solved by the Invention) In this way, in conventional shoring, a large number of wedges 25 of a shape corresponding to the above-mentioned gap are prepared, and these are inserted into the above-mentioned wedge-shaped gap, and the receiving plate 23 and the base The process of fixing the board 24 by nailing was extremely complicated and required many work steps that required considerable skill.

Moreover, when removing the formwork 21, it was necessary to perform troublesome and labor-intensive cleanup work, such as pulling out the nails that were driven in and disposing of the scattered nails for safety.

Therefore, an object of the present invention is to, for example, when a pipe support for receiving and supporting formwork for pouring a pitched roof made of reinforced concrete is erected at an angle on a construction foundation, the lower end of the support is attached to the construction foundation. To provide a support frame for a pipe support for shoring, which is useful for carrying out the work of stably erecting it on top as easily and reliably as possible.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the support frame of the pipe support for shoring according to the present invention has the following features: The structure includes a bearing surface 5a having a spherical or conical shape that is slidably abutted, and a bottom surface 5b whose surface that comes into contact with the construction base PAD surface is formed into an uneven surface or a rough surface. .

The support frame 5 is formed into a hemispherical shell shape, and the bottom surface 5b
It is preferable to form an uneven surface or a rough surface in the circumferential direction such as a wavy shape or a sawtooth shape.

(Function) First, simply place the support frame 5 at a predetermined location on the construction foundation, and then open the circular opening 1 at the lower end of the pipe support A.
When a is placed over the support surface 5a of the support pedestal S,
Since this bearing surface 5m has a spherical or conical surface, even if the pipe support A is placed on it at a considerable angle, the peripheral edge of the circular opening 1a will overlap the entire circumference of this bearing surface 5a. It comes into close contact with no looseness.

Since the bottom surface 5b of the support pedestal 5 that comes into contact with the construction base slope is formed into an uneven surface or a rough surface, it receives the horizontal component of the large load applied to the inclined pipe support A. Even if the pipe support A is tilted, it will receive and support the load applied to its upper end in a stable state without any fluctuation. .

(Example) Below, a first example will be described in which the present invention is applied to shoring that supports a pouring formwork for a pitched roof made of reinforced concrete F.
This will be explained with reference to FIGS. 4 to 4.

First, as shown in FIG. 1, the pipe support A is made by sliding the lower end side of an inner tube 2, which is thinner than the outer tube 1 and has a predetermined length, on top of a thick outer tube 1 of a predetermined length made of steel pipe. The main body portion is configured to be movably inserted.

In the middle part of this main body in the longitudinal direction, there is a pipe support A.
An adjustment mechanism for adjusting the length is incorporated, but since this is the same as a well-known mechanism, its illustration is omitted.

3 is a square flange-shaped plywood welded to the lower end of the outer tube 1, and a circular opening 1a having a diameter equal to the inner diameter of the outer tube 1 is bored in the center thereof.

4 is a receiving plate welded to the upper end of the inner tube 2, and has the same shape as the base plate 3. In addition, the base plate 3. The plate surface of the receiving plate 4 is provided with nail holes at a plurality of locations.

Now, reference numeral 5 denotes a support frame, which is made of metal and has a hemispherical shell shape as shown in FIG. 2, and its diameter is larger than the diameter of the circular opening 1a. It is made so that it does not sink into the circular opening 1a.

The material of this support frame S may be synthetic resin as long as it has sufficient strength, but metal is preferable to obtain higher strength.

The spherical curved surface on the front side of the support frame 5 forms a support surface 5a that receives and supports the pipe support A, and also forms a circumferential lower end surface 5.
b is formed into a wavy uneven surface with equal pitches. Note that the support surface 5a may be an elliptical surface or the like instead of a spherical surface.

Next, 6 (see enlarged views in Figures 3 and 4) is a beam fixture that is detachably attached to the upper end of the pipe support A.
As shown in Figure 1, the sloped roof B made of reinforced concrete
The direct support plays the role of supporting the formwork C for pouring.

In Fig. 1, the formwork C is the upper surface of a thick joist that is placed on top of a beam (large pull) 1 made of rectangular cylindrical section steel, with one crosspiece placed over the other, and nailed onto the crosspiece 8. It is constructed by stretching plywood III, which will serve as the surface for concrete pouring.

The beam fixing tool 6 includes a pair of side plates 11.11 each having an elongated oval shape, which are placed opposite to each other at a distance that can hold both sides of the beam 1, and the lower portions of these side plates 11.11 are connected to each other. The main body portion is constituted by the connecting plate 12 to be connected. The lower edge portion of the open plate 11 is formed in an arc shape.

In the main body portion of the above-mentioned device, a shaft 13 is provided at the lower part of the connecting plate 12, spanning between the side plates 11 and 11. This axis 1
3, a vertically oriented short cylindrical joint 14 is rotatably supported at its upper end, and the outer diameter of the joint 14 fits into the inner space of the upper end of the inner pipe 2 of the pipe support A. It is thick enough to be inserted.

Further, as shown in Fig. 4, vertically rectangular horizontal holes 11a and 11b are provided in the upper part of the side plates 11 and 11 for driving wedges 15 across the frame, and needle holes are provided below them. A is provided. The distance between the lower edges of these horizontal holes 11a and llb and the upper surface of the connecting plate 12 is approximately equal to the thickness of the beam l and the crosspiece 8.

Next, the operation of the above configuration will be explained.

First, a sufficient number of pipe supports A to reliably support the formwork C are placed on a construction base such as a concrete floor surface at predetermined intervals, for example, in a base grid pattern. The plurality of supporting frames 5 are simply left in place as shown in FIG.

Then, as shown in the figure, a pipe support A tilted at a predetermined angle is placed so that the circular opening 1a at the lower end thereof covers the support surface 5a of each support pedestal 5. At this time, the joint 14 of the beam fixture 6 is inserted into the inner space at the upper end of each pipe support A, and the beam fixture G is attached to the upper end.

In this state, the entire circumference of the peripheral edge of the circular opening is in close contact with the spherical bearing surface, and each pipe support A has a spherical bearing surface within the angular range, regardless of its inclination angle. Each support pedestal 5 is installed in a stable and stable state.
erected above.

In such an upright state, each pipe support A is reliably supported on the construction base and exhibits independence, so as with conventional construction methods, horizontal connecting members, wires, etc. are used to connect adjacent pipe supports. It is no longer necessary to connect A and A to prevent them from collapsing. Of course, it goes without saying that shoring can be done more reliably if this conventional connection work is also used.

Next, the beam fixture L provided at the upper end of each pipe support A
6, so that the racks are passed between each side plate 11.1 of
A beam 7 is dropped between the beams 1 and 1, and then the beams 8 are stacked and placed on top of it. After that, as shown in FIG. 4, when the wedge 15 is driven across the horizontal holes 11a and llb of the side plates 11 and 11, the beam 7
The crosspieces 8 are sandwiched between the wedges 15 and the connecting plates 12, and are securely fixed to each beam fixture 6.

Even in this fixed state, the beam fixing device 6
Since it is possible to swing around the beam 1 in the longitudinal direction,
The formwork installation angle can be adjusted to a desired angle. At this time, since the lower edge portion of the side plate 11 that comes into contact with the upper surface of the receiving plate 4 of the pipe support A is formed in an arc shape, the above-mentioned swinging movement is not inhibited.

Next, a joist is nailed onto the crosspiece, and 1 g of plywood is stretched over it to complete the formwork C.

In this way, the support frame 5 on which the pipe support A is erected in an unwavering and stable state has an uneven surface on its bottom surface 5b that comes into contact with the construction foundation, so the pipe support A is tilted. Even if a horizontal component of a strong load transmitted through the support pedestal 5 is applied to the support pedestal 5, there is no fear that the pedestal pedestal S, which is simply placed, will slide on the construction foundation.

Furthermore, when the pipesert A is placed at an appropriate location on the inclined bottom surface of the formwork C which has already been constructed at a predetermined angle of inclination so as to support a poking rod from below, the above-mentioned support frame 5 is also used.
However, in the conventional shoring method described above, a wedge is inserted into the gap between the plywood of the pipe support A and the construction base. Insert the pipe supports, nail the white boards to the construction base, and connect adjacent pipe supports to each other using horizontal connecting members, wires, etc. This is an extremely troublesome fixing work that requires skill (so-called "negarami"). ``Work).

Furthermore, when removing pipe support A, cleanup work such as removing nails that have been driven must be done.
This required double effort and expense.

5 and 6 show another embodiment of the present invention, in which the support pedestal 18 includes a conical support surface ISm for supporting the pipe support A on the square plate-shaped substrate 11. The conical body 11 is fixed, and the spikes 1 are placed at multiple locations on the bottom surface of the substrate 11! It has a protruding form.

This support pedestal 16 can be efficiently integrally molded, for example, from reinforced plastic.

Or Spike 1! Instead of, for example, based on sand grains, etc. 1
It may be bonded to the bottom surface of 11, and this bottom surface may be formed into a rough surface.

Furthermore, by making the upper surface of the base 17 sloped, the intersection angle of the axes of the conical body 11 and the pipe support A can be made smaller, so that even if the pipe support A is tilted more greatly, it can be supported stably. .

The function of this support frame 16 is similar to that of the support frame S described above.

[Effects of the Invention] As is clear from the above description, the support frame for the pipe support for shoring according to the present invention has a spherical surface that slidably abuts the peripheral edge of the circular opening at the lower end of the pipe support. Since the structure has a conical bearing surface and a bottom surface with a high coefficient of friction against the construction base surface, it has various excellent effects as listed below, and overall the cost required for shoring can be reduced compared to conventional methods. This is an excellent invention that can significantly reduce the amount of energy used.

a) Since there is no gap at all between the lower end of the pipe support and the construction base, there is no need for a pad such as a wedge to fit into the gap, unlike conventional ones.

b) There is no need to nail the lower end of the pipe support to the construction base, which was conventionally done, and therefore there is no need for the troublesome work of removing nails when removing the pipe support, as well as the associated cleanup work.

C) The "root-related" work described in items a) and b) above requires considerable skill, but the support frame of the present invention, which makes it possible to omit this work, simply needs to be placed on the construction base. , even unskilled workers can easily perform the construction.

[Brief explanation of drawings]

Figures 1 to 4 show an embodiment in which the present invention is applied to shoring for pouring forms for reinforced concrete pitched roofs. Figure 1 is a sketch of the construction state of the shoring; The figure is a partially cutaway side view of the support frame, and FIGS. 3 and 4 are a front view and a side view, respectively, showing a beam fixture detachably attached to the upper end of the pipe support. FIGS. 5 and 6 are a perspective view and a partially cutaway side view showing another embodiment of the present invention. FIG. 7 is a diagram corresponding to FIG. 1 explaining a conventional shoring structure. 1 Outer pipe 2 Inner pipe 4 Receiving plate 5a Support surface beam fixture 8 Crosspiece 1- Plywood 12 Connecting plate 14 Joint 20 Sloped roof code Table 1a Circular opening 3 Base plate 5 Support frame 5b Circumferential end surface (bottom surface) 1 Beam 3 Joist 11 Side plate 13 Axis 15 Wedge 21 Formwork 2 Construction base 23 Backing plate 4 Base plate 2S Wedge pipe support Reinforced concrete sloped roof formwork (supporting material) Construction base nail hole b Lower edge part M1 diagram b Figure 2 Figure 3 Figure 4 Figure 7

Claims (3)

[Claims] (1) Pipe support A is tilted and erected on the construction base D to receive and support a support C having an inclined bottom surface, such as a formwork for pouring a reinforced concrete sloped roof B.
A supporting surface 5a having a spherical or conical surface shape and which is for stably supporting the lower end of the pipe support A and slidably abuts the peripheral edge of the circular opening 1a at the lower end of the pipe support A; A support pedestal 5 for a pipe support for shoring, comprising a bottom surface 5b whose surface that comes into contact with the surface D of the base is an uneven surface or a rough surface. (2) The support frame for a pipe support for shoring according to claim 1, wherein the support frame 5 has a hemispherical shell shape, and a circumferential end surface thereof forms the bottom surface 5b. (3) The support frame for a pipe support for shoring according to claim 2, wherein the bottom surface 5b is formed in an uneven shape such as a wave shape or a sawtooth shape in the circumferential direction.