JPH0618982Y2 - Concrete formwork assembly fittings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to an assembly metal fitting for connecting a side frame and a bottom frame of a concrete formwork used for manufacturing a concrete bridge or the like.

(Prior Art) When manufacturing a concrete bridge used for an elevated railroad or a bridge, side frames are assembled on both sides of a bottom frame to form a form, and ready-mixed concrete is poured into the form.

As shown in FIG. 4, a conventional mold 1 is assembled by connecting a side frame 2 and a bottom frame 3 with an assembly metal fitting 4.

In the structure of the assembly fitting 4, angles 5 are attached to both ends of the bottom frame 3 along the longitudinal direction to form side walls 6. A pair of angles 5 and 5 are laterally welded at predetermined pitches along the longitudinal direction of the side wall 6 at intervals.

Numeral 7 is a substantially T-shaped pressing metal fitting, the tip side of which is connected to the pressing portion 8 as shown in FIG. 5, and the lower side is inserted between the angles 5 and 5 and rotatably supported by the pin 9. ing.

When the mold 1 is assembled, the side frames 2 and 2 are erected on the bottom frame 3 with a space therebetween, and the pressing metal fitting 7 is rotated, so that the pressing portion 8 at the tip of the side frame 2 forms an angle 5 below the side frame 2. Is pressed from the top, and the wedge 11 is driven into the recessed portion 10 of the holding metal fitting 7, and the bottom frame 3
And the side frame 2 are connected and fixed.

After that, ready-mixed concrete is poured into the formwork 1 to manufacture a bridge.

However, the conventional formwork 1 forms the assembly fitting 1
Since the pair of angles 5 and 5 are welded to the bottom frame 3 at a predetermined interval, the width of the bottom frame 3 is determined according to the lateral width of the bridge to be manufactured, and the bottom frame 3 must be manufactured according to the manufacturing dimensions. I won't.

Further, since the angle 5 is welded so as to project in the lateral direction of the bottom frame 3, it cannot be used as a component frame of the side frame, and transportation and storage are troublesome.

Further, although the position of the reinforcing rib 12 is different depending on the design, when the angles 5 and 5 of the assembly metal fitting 4 are located below this, it cannot be pressed as shown in FIG.
There was a defect such as a decrease in strength.

(Problems to be solved by the invention) As a result of various studies in view of such a point, the present invention shows that the assembly metal fittings are detachably attached to the side wall of the bottom frame, and the projection is not welded. The horizontal width can be adjusted freely by installing them side by side, and the bottom frame can be used as a side frame for easy transportation and storage.Because the mounting bracket can be attached regardless of the position of the reinforcing ribs, the strength of the form The present invention also provides a concrete formwork assembly metal fitting that can be improved.

(Means for solving the problem) In a concrete formwork assembling tool that holds and connects a side frame and a bottom frame, the tip is an upper holding part that holds down the lower part of the side frame, and a wedge insertion hole is opened in the lower side. Upper bracket, a lower bracket fixed to the side wall of the bottom frame with a bolt, a lower pressing protrusion protruding from the front surface of the lower bracket to press the bottom frame from below through the side wall, and a rear surface of the lower bracket. Side, a connecting portion provided on the side, an inserting portion of the upper metal fitting formed in the connecting portion, a wedge insertion hole formed in the connecting portion, and a wedge for connecting the upper metal fitting to the inserting portion. It is characterized in that the side frame and the bottom frame are held from above and below by the upper pressing portion and the lower pressing protrusion.

(Operation) In the concrete formwork assembling metal fitting of the present invention, the insertion hole for the lower pressing protrusion and the bolt is previously formed on the side wall of the bottom frame with a predetermined pitch.

Next, the lower pressing protrusion is inserted into the insertion hole to fix the lower metal fitting to the side wall of the bottom frame. After this, set the side frame upright on the bottom frame, insert the upper metal fitting into the insertion part of the lower metal fitting so as to press the lower bent part of the side frame, and put the wedges in the wedge insertion holes of both metal fittings. Drive in.

When the wedge is driven deeply, the upper fitting moves down, the upper pressing part at the tip presses the side frame against the bottom frame, and the lower pressing protrusion abuts the bottom side of the bottom frame, holding the side frame and bottom frame from above and below. Then, they are firmly connected.

(Embodiment) An embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 3.

In the figure, 13 is an upper metal fitting, 14 is a lower metal fitting, and 15 is a wedge, which constitute an assembly metal fitting 16.

The upper fitting 13 is formed in an inverted L shape, and an upper pressing portion 17 is formed at the tip thereof, and a wedge insertion hole 18 is formed in the center of the lower portion thereof to form a pistol shape. Further, a round bar 19 is integrally welded to the upper part, and an adjusting bolt 20 is attached thereto.

The lower metal fitting 14 is provided with a rectangular lower pressing projection 22 on a front surface of a thick plate main body 21, and a rectangular tubular connecting portion 23 is integrally formed on the rear surface.

Bolt insertion holes 24, 24 are formed on the left and right of the main body portion 21, and wedge insertion holes 18, 1 are formed on both sides of the connection portion 23.
8 is opened, and the inside of the connecting portion 23 serves as the insertion portion 25 of the upper fitting 13.

Further, on one wall surface of the wedge insertion hole 18 of the support body 23,
As shown in FIG. 2, a top 26 is elastically supported by a spring 27 and is provided in a protruding manner to prevent the wedge 15 from falling off.

In the figure, 28 is a stopper hole and 33 is a bolt.

Further, the wedge 15 has a flat plate shape, is thinly formed toward the tip, and corrugated portions 29 are provided on both end surfaces thereof.

As shown in FIG. 1, the mold 1 has a bending member 30 welded to the lower portion of the side frame 2, and a cross section formed by plastic such as vinyl chloride between the bending member 30 and the bottom frame 3. A triangular face plate 31 is interposed.

An angle 5 is attached to the end of the bottom frame 3, a square hole 32 is formed in the side wall 6 thereof, and bolt insertion holes 24, 24 are formed on both sides thereof.
Are opened, and these three holes are set as one set and are opened at predetermined pitches along the longitudinal direction.

Next, the case of assembling the mold 1 will be described. The lower pressing projection 22 of the lower metal fitting 14 is inserted into the square hole 32 of the side wall 6, and the bolt 33 is passed through the insertion holes 24 of the main body 21 and the side wall 6 to attach the lower metal fitting 14 to the bottom. It is fixed to the frame 3.

Next, the side boards 31 are placed on both sides of the bottom frame 3, and the side frames 2 are erected on this.

Thereafter, the lower portion of the upper metal fitting 13 is inserted into the insertion portion 25 of the lower metal fitting 14, and the upper pressing portion 17 is bent to the bending member 30 of the side frame 2.
The side frame 2 by adjusting the adjusting bolt 20.
Abut.

At this time, the connecting portion 23 between the upper fitting 13 and the lower fitting 14
Since the insertion holes 18 and 18 are overlapped with each other, the wedge 15 is laterally driven into the insertion hole 18 to connect the upper fitting 13 and the lower fitting 14 as shown in FIG.

A corrugated portion 29 is formed on the side surface of the wedge 15, and the insertion hole 1
When passing through 8, the top 26 that elastically protrudes
It is possible to prevent the wedge 15 from falling off even if vibration is applied when the fresh concrete is poured into the fitting portion 9.

In this way, when you hit the wedge 15 hard,
The upper metal fitting 13 descends, the upper pressing portion 17 strongly presses the side frame 2, and the lower pressing protrusion 22 pushes up the bottom frame 3 from the lower side with the connecting portion 23 as a fulcrum, so that a large force is not applied to the bolt 33. In addition, the side frame 2 and the bottom frame 3 can be sandwiched and firmly connected between them.

Further, even when the reinforcing ribs 12 are attached to the side frames 2, the assembly metal fittings 16 can be attached at arbitrary positions by removing the ribs, so that the strength of the form 1 can be improved.

Further, since the bottom frame 3 has no protruding portion when the lateral width of the form 1 is wide, a plurality of bottom frames 3 can be arranged side by side and adjusted, and the bottom frame 3 can also be used as a constituent member of a side frame.

In addition, if a round bar is inserted into the stopper hole 28 and provided upright, a stopper that prevents the side frame 2 from collapsing when the mold 1 is removed can be provided.

In the above embodiment, the adjustment bolt 20 is attached to the upper fitting 13, but it may be provided if necessary, and the corrugated portion 29 and the top 26 for preventing the wedge 15 from coming off are similarly provided. It may be provided if necessary.

Further, the lower pressing protrusion 22 is not limited to a square shape, but may be a round shape.

(Effect of the Invention) As described above, according to the concrete formwork assembly metal fitting of the present invention, it can be detachably attached to the bottom frame,
The bottom frame can be installed side by side and the width can be adjusted freely, it can also be used for the side frame, it is easy to transport and store, and the assembly metal fittings can be attached regardless of the position of the reinforcing ribs. It also has a remarkable effect that it can be improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an assembly metal fitting according to an embodiment of the present invention, FIG. 2 is a perspective view of a lower metal fitting cut along the line II-II of FIG. 1, and FIG. Front view showing the fourth
FIG. 5 is a perspective view showing a conventional mold, and FIG. 5 is an enlarged perspective view showing the assembly metal fitting of FIG. 1 ... Form frame, 2 ... Side frame 3 ... Bottom frame, 4 ... Assembly bracket 5 ... Angle, 6 ... Side wall 12 ... Rib, 13 ... Upper bracket 14 ... Lower bracket, 15 ... Wedge 16 ... Assembly bracket, 17 ... Upper foot Part 22 ... Lower presser projection, 23 ... Connection part 31 ... Face plate

Claims (1)

[Scope of utility model registration request] 1. A concrete formwork assembling tool for sandwiching and connecting a side frame and a bottom frame, wherein the tip is an upper pressing part for pressing the lower part of the side frame, and an upper metal part having a wedge insertion hole on the lower side. A lower metal fitting fixed to the side wall of the bottom frame with a bolt, a lower pressing protrusion protruding from the front surface of the lower metal fitting and penetrating the side wall to press the bottom frame from below, and a connection provided on the rear side of the lower metal fitting. A part, an insertion part of the upper metal fitting formed in the connection part, a wedge insertion hole opened in the connection part, and a wedge connecting the upper metal part to the insertion part for connection.
A concrete formwork assembly fitting characterized in that a side frame and a bottom frame are held from above and below by an upper pressing portion and a lower pressing protrusion.