JP2654783B2 - Formwork support device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a form support device suitable for supporting a form forming a haunch portion of a bridge girder.

(Prior art) Conventionally, to construct a haunch part of a bridge girder, for example,
As shown in FIG. 12, from the horizontal plane to the inclined surface of the haunch portion, a shoring method is employed in which a large number of pipe supports R having different lengths are erected and supported.

In addition to the above, there is a special construction method using H steel as a horizontal member or a diagonal member for forming a haunch portion at a height of a bridge girder.

(Problems to be Solved by the Invention) However, in a shoring method using a large number of pipe supports R having different lengths, the lengths of the pipe supports R are accurately adjusted according to the inclination angle of the haunch portion. And the assembly and dismantling work of the pipe support R becomes extremely complicated.

In addition, when H steel was used for the diagonal member and the end member, the weight of the entire support was increased, and it became inevitable that the heavy equipment was frequently used.

Therefore, the present invention has been created in order to solve the above-mentioned inconveniences.
It is an object of the present invention to provide a formwork supporting apparatus in which dismantling work is extremely simplified, and which can be performed at a lighter weight than a construction method using H steel, and in which heavy machinery is used less frequently.

(Means for Solving the Problems) In order to achieve the above-described object, the present invention connects one end of a pair of upper and lower parallel support beams in a swingable manner, and connects the upper support beam from the lower support beam. Forming a stretchable rod-shaped diagonal material that supports the angle freely, between the longitudinal side edge of the lower support beam and the longitudinal side edge of the upper support beam that are horizontally supported on a predetermined support, A suitable number of diagonal members are detachably provided, and a fixing tool for detachably fixing on the longitudinal side edge of the lower support beam is provided.A long bolt is applied to the fixing tool from the end of the separator protruding from the side wall formwork. Linking is a means for solving the problem.

(Operation) According to the present invention, one pair of upper and lower parallel support beams are connected at one end, and the upper support beam can swing about the connection portion as a fulcrum.

The diagonal member supports the upper support beam from the lower support beam so that the angle can be adjusted by adjusting the length of the diagonal member so as to be able to expand and contract.

The diagonal material is provided between the longitudinal side edge of the lower support beam and the longitudinal side edge of the upper support beam in a detachable manner, so that the upper support beam adjusted to a certain angle and a predetermined angle are provided. The lower support beam horizontally supported on the supporter is integrated.

In addition, a long bolt connects the fixture of the support beam and the separator protruding from the side wall formwork, and fixes the support beam to the side wall formwork.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

Reference numeral 1 shown in the figure is a support beam, and this support beam 1
Uses a support beam previously proposed by the applicant in Japanese Utility Model Laid-Open No. 59-148845. That is, one long plate 1A provided with a plurality of connection windows in the longitudinal direction is connected and formed so as to face in parallel (see FIG. 4), and a slide groove 1D is provided between the long plates 1A (see FIG. 4). 5), and a pair of fastening holes 1B for fastening a chain is formed between the substantially trapezoidal connecting windows 1C through which the square pipe or the round pipe is inserted (see FIG. 6).

Then, a pair of upper and lower support beams 1 are arranged in parallel, and one longitudinal ends of the support beams 1 are connected to each other by a hinge 3 so that the other end of the support beam 1 is swingable (see FIG. 8). Further, an elastic diagonal member 2 is interposed between the support beams 1 so that the swing angle of the support beam 1 can be adjusted (see FIG. 1).

The diagonal member 2 in the illustrated example includes a support rod 2A for adjusting the length of the diagonal member so as to be extendable and contractible, and a connecting body 2B provided at both longitudinal ends of the support rod 2A. To adjust the expansion and contraction of the support rod 2A, a screw-type jack 2D and a slide pin 2E for inserting and locking a double slidable cylindrical body from the inside and outside from the side of the cylindrical body are used together (see FIG. 3). .

On the other hand, the connecting body 2B is formed by extending a hinge plate 2G from the base plate 2F placed on the longitudinal side edge of the long plate material 1A to the outer upper side, and connecting holes 2H formed in the hinge plate 2G.
The supporting rod 2A is swingably connected by inserting a fastening pin 2C into the connector (see FIG. 6). A fixing plate 2I is inserted from the base plate 2F into the slide groove 1D of the support beam 1, and a fixing pin 2C is inserted into a pin insertion hole 2J formed in the fixed plate 2I to stop the support beam 1. Secure to the hole 1B (No. 7
See figure).

At this time, by providing a guide plate 2K having a width to be fitted into the slide groove 1D perpendicular to the side edge of the fixed plate 2I,
This prevents rattling in the slide groove 1D of the fixed plate 2I.

The hinge fitting 3 connects one end of the upper and lower support beams 1 so as to be swingable (see FIG. 8). In the example shown,
A pair of hinge plates 3A opposed to each other are erected and fixed on the longitudinal side edge of one end of the support beam 1, and fixed to the longitudinal end of the other support beam 1 which is connected to be able to adjust the angle. 3B is inserted between the hinge plates 3A and fastened with the connecting pins 3C (see FIG. 9).

Reference numeral 4 denotes a fixture for connecting and fixing the support device of the present invention to the separator Q via a predetermined long bolt 4A (see FIG. 1). The fixing device 4 is a pair of plate members each having a substantially triangular shape in front facing each other, connected and fixed, and detachably fixed on a longitudinal side edge of the lower support beam 1, and protrudes from the side wall formwork. A long bolt is connected from the end of the separator Q to the fixture 4 (see FIG. 11). In addition, the adjacent support beam 1
By connecting the fixing members 4 with each other with an arbitrary rod-shaped member 4B, it is possible to further increase the supporting strength of the fixing members 4 and to prevent the supporting device of the present invention from being inclined or collapsed (tenth embodiment). See figure).

In the use of the present invention, the upper and lower support beams 1 are laid with a diagonal member 2 at a predetermined angle, and this is mounted and fixed on the support P by a crane. Also, when dismantling, the crane should be lowered with a crane in a combined state.

(Effects of the Invention) The present invention achieves the original object by being configured as described above.

That is, one ends of a pair of upper and lower parallel support beams 1 are swingably connected to each other, and a lower support beam 1 is connected to an upper support beam 1.
Is formed in a stretchable rod-like diagonal member 2 for supporting an angle freely, and a longitudinal side edge of a lower support beam 1 and a longitudinal side edge of an upper support beam 1 horizontally supported on a predetermined support P. Between
By arranging an appropriate number of the diagonal members 2 detachably, the diagonal members 2 can be adjusted to extend and contract and the support angle can be set simply by disposing the diagonal members 2 between the support beams 1. Adjustment work is greatly simplified.

In addition, a long bolt connects the fixture of the support beam and the separator protruding from the side wall formwork, and fixes the support beam to the side wall formwork. As a result, the safety of the support beam can be enhanced, and the support beam has extremely high safety.

In addition, the support device of the present invention can
Since it can be installed and disassembled on the top, the installation and dismantling work on the shoring P becomes extremely easy. Therefore, unlike the conventional shoring method using a large number of pipe supports with different lengths, it has been freed from the extremely complicated work of accurately adjusting the length of each pipe support according to the inclination angle of the haunch part. .

Further, the basic configuration of the support device of the present invention is composed of a pair of upper and lower parallel support beams 1 and an appropriate number of extendable and contractible rod-shaped diagonal members 2, so that it is compared with the construction method using H steel. Lightweight construction is possible, no special support P is required for using H steel, and the frequency of using heavy machinery is reduced.

As described above, according to the present invention, the adjustment of the support angle of the haunch part, the assembling, and the dismantling work of the shoring work are extremely simplified, and the construction is extremely safe and lighter than the construction method using H steel. Thus, various industrially useful effects such as a reduction in the frequency of use of heavy machinery are exhibited.

[Brief description of the drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a front view showing a use state, FIG. 2 is a side view of the same, FIG. 3 is a longitudinal sectional view of a diagonal member, and FIG. Fig. 5, Fig. 5 is a longitudinal sectional view, Fig. 6 is an enlarged front view showing a connecting portion between a diagonal member and a beam member, Fig. 7 is a side view thereof, Fig. 8 is an enlarged front view showing a hinge portion, 9 is a side view, FIG. 10 is an enlarged front view showing a fixture, FIG. 11 is a side view, and FIG. 12 is a front view showing a conventional example. 1 ... support beam, 1A ... long plate material, 1B ... fastening hole, 1C ...
Linking window, 1D: sliding groove, 2 ... diagonal, 2A ... supporting rod, 2B ... connecting body, 2C ... fastening pin, 2D ... jack part, 2E ... sliding pin, 2F ...
... Base plate, 2G ... Hinge plate, 2H ... Connection hole, 2I ... Fixing plate, 2J ... Pin insertion hole, 2K ... Guide plate, 3 ... Hinge bracket, 3A ... Hinge plate, 3B ... Hinge Plate, 3C Connection pin, 4 Fixture, 4A Long bolt, 4B Rod-shaped member P Support, Q Separator, R Pipe support.

Claims (1)

(57) [Claims] An upper and lower support beam is connected to one end of a pair of upper and lower parallel support beams so as to swing freely, and a stretchable rod-like diagonal member is formed to support an upper support beam from a lower support beam so as to be adjustable in angle. A suitable number of diagonal members are detachably provided between the longitudinal side edge of the lower support beam and the longitudinal side edge of the upper support beam horizontally supported on the predetermined A form supporting device, comprising: a fixing tool which is detachably fixed on a longitudinal side edge of a beam; and a long bolt is connected from a tip of a separator protruding from a side wall forming form to the fixing tool.