JPS5922182Y2 - Bar connection structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bar connection structure for formwork assembly used when assembling concrete formwork.

Large concrete structures such as dams are constructed by assembling formwork 30 in several stages in the height direction as shown in Figure 1, and stacking the structures sequentially upward from the bottom. To explain the conventional fixing method, first, anchor reinforcing bars 41, 41,
... is fixed in place, and its anchor reinforcing bar 41
．． Connecting reinforcing bars 42, 42... are arranged between the connecting reinforcing bars 41, 41, and the frame plates 31, 31, and the connecting reinforcing bars 42
．． 42... The frame plates 31.31 were fixed by fixing one end to the frame plate 31 and welding the other end to the anchor reinforcing bars 41.41..., and the formwork 3
Anchor reinforcing bars 41 for fixing frame plates 31 and 31 to be assembled next on the surface of the filled concrete before the concrete is filled with concrete and solidified.
', 41', etc. are erected, and after the concrete has hardened, a formwork 30 is similarly assembled on top of it, filled with concrete, and stacked upward one after another to construct a structure.

However, in this conventional formwork assembly method, the anchor reinforcing bars 41 and the connecting reinforcing bars 42 are connected by welding at the formwork assembly site, resulting in low work efficiency, prolonging the construction period, and increasing the formwork assembly cost. Ta.

This invention was made to improve the connection structure of bars such as anchor reinforcing bars and connecting reinforcing bars during formwork assembly as described above, and connects both bars with one touch using relatively inexpensive connecting fittings. It is an object of the present invention to provide a bar connecting structure which can fix horizontal bars in an inclined state with respect to vertical bars.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 2 to 7. FIGS. 2 to 4 show a bar connection structure using reinforcing bars as bars. The bar connection structure includes a bar receiving member 2 and a wedge 3 that acts as a tightening member.
The structure is such that two reinforcing bars 41 and 42 are fixed in a mutually intersecting state by using a connecting fitting 1 consisting of the following.

The bar receiving member 2 of the connecting fitting 1 is formed by integrally connecting two side plates 4, 4 at the rear end portion 8, and the both side plates 4
, 4 is formed with a cavity 5 into which the anchor reinforcing bar 41 is inserted in the vertical direction.

Also, a part 4 of both side plates 4, 4 is located near the rear of both side plates 4, 4.
A guide groove 6 for wedge insertion is formed by narrowing inward the a and 4 a.

The rear ends 8 of the side plates 4, 4 are pigmented inwardly, and when the wedge 3 is inserted into the guide groove 6, as the wedge 3 is driven downward, the wedge 3 is moved forward. It is now possible to move it to

Furthermore, window holes 7, 7 of relatively large diameter are formed opposite to each other in the central part of the side plates 4, 4, and these window holes 7,
A tether reinforcing bar 42 is inserted through 7 in the lateral direction.

Further, the window holes 7, 7 are formed vertically, and the window holes 7, 7 are formed vertically.
, 7 so that the connecting reinforcing bars 42 can be inserted from the lateral direction at an appropriate angle.

The wedge 3 has a rear end side 14 tapered downward, and a plurality of short pieces 16, 1 on the front end side 15.
A reinforcing bar receiving portion 17 is formed by alternately bending the reinforcing bars 6... into an open leg shape in the horizontal direction.

The reinforcing bar receiving portion 17 of this wedge 3 is for holding the anchor reinforcing bar 41 from behind when the wedge 3 is driven into the guide groove 6 of the bar receiving member 2.

As shown in FIG. 5, the anchor reinforcing bar 41 is embedded in the conch notebook base 40 with its upper part exposed.

Note that the diameter of this anchor reinforcing bar 41 does not need to be constant, and leftover reinforcing bar may be used.

The connecting reinforcing bar 42 has an appropriate length, and one end 42a thereof is provided with a male screw 43 for supporting and fixing the frame plate 31 (Fig. 5), and the other end 42b is bent into a meandering shape. A concavo-convex portion 44 is formed.

When the connecting reinforcing bars 42 are crossed and connected to the anchor reinforcing bars 41 by the connecting fitting 1, these uneven parts 44 engage with the anchor reinforcing bars 41 between the uneven parts of the connecting reinforcing bars 42, and the connecting reinforcing bars 42 engage with the anchor reinforcing bars 41. This is to prevent you from leaving.

The bar connection structure of this embodiment is implemented as shown in FIG.

That is, the concave and convex portions 44 of the connecting reinforcing bars 42 are penetrated laterally into the window holes 7, 7 formed in the side plates 4, 4 of the bar receiving member 2, and the hollow space 5 of the bar receiving member 2 is penetrated from the side. Connecting reinforcing bar 4
An anchor reinforcing bar 41 is inserted in the longitudinal direction closer to the rear than the penetration position of No. 2, and both reinforcing bars 41 and 42 are connected in the vertical and horizontal directions in the space 5, and then wedged into the guide groove 6 from above. 3
, and press both reinforcing bars 41 and 42 forward to firmly connect them.

At this time, since the window holes 7.7 are vertically long, the connecting reinforcing bars 42 inserted into the window holes 7, 7 should be fixed at an appropriate angle within the range of the window holes 7, 7. I can do it.

In addition, in this case, open leg short piece 16.1 of reinforcing bar receiving part 17 of wedge 3
Since the wedge 6 holds the outer surface of the anchor reinforcing bar 41, the wedge 3 descends without coming off from the anchor reinforcing bar 41, and both reinforcing bars 41 and 42 can be firmly tightened.

In addition, the uneven portions 44 of the connecting reinforcing bars 42 correspond to the anchor reinforcing bars 41.
Since it is firmly pressed against the anchor reinforcing bar 41, it will not separate from the anchor reinforcing bar 41.

FIG. 5 shows an example in which the bar connection structure of this embodiment is applied to fixing formwork for forming large concrete structures such as dams. Anchor reinforcing bars 4 are placed inside the planned frame board erection position.
1.41... is embedded and fixed.

And the uneven portion 4 of the anchor reinforcing bar 41 and the connecting reinforcing bar 42
4 are crossed and connected to each other by the bar receiving member 2 of the connecting fitting 1, and then the male screw 43 of the connecting reinforcing bar 42 is passed through the frame plate 31 and the male screw 43 is screwed in. 45.45
The frame plate 31 is attached to the male threaded portion 43 by screwing them together.

At this time, the connecting reinforcing bars 42 are inclined at an appropriate angle with respect to the surface of the concrete base 40.

And the bar receiving member 2 through which both reinforcing bars 41 and 42 are inserted
Drive the wedge 3 into the guide groove 6 of both reinforcing bars 41 and 42.
are firmly connected, and the frame plate 31 is supported and fixed by the connecting reinforcing bars 42.

The other frame plate 31 is also supported and fixed in the same manner.

Next, concrete is filled between the two frame plates 31 and 31,
Before the concrete hardens, other anchor reinforcing bars 41', 41' are embedded in its surface.

Once the concrete has hardened, the frame plates 31 and 31 are removed, a formwork is similarly assembled on top of the concrete, and the process is repeated to construct a concrete structure of a predetermined height.

FIG. 6 shows another example of the use of the bar connection structure of this embodiment, in which the frame plate 31 is used when assembling formwork for relatively small concrete structures such as irrigation canals. The figure shows the case in which it is supported from the outside.

That is, when supporting the frame plate 31 from the outside, anchor reinforcing bars 41 are driven into the ground surface outside the frame plate 31, and the anchor reinforcing bars 41 and the supporting connecting reinforcing bars 42 are connected to the connecting metal fittings 1.
The other end 42 of the connecting reinforcing bar 42
a to the frame board 31 and connect the frame board 31 with reinforcing bars 42.
It is supported by

In this usage example, as shown in an enlarged view in FIG. 7, an L-shaped metal fitting 53 is attached to the tip of the connecting reinforcing bar 42.

A narrow neck portion 51 and a swollen head 52 are formed at the tip of the connecting reinforcing bar 42. A small hole 54 of an L-shaped metal fitting 53 is fitted into the thin neck portion 51, and the swelled head 52 prevents the rod from coming off.

This L-shaped metal fitting 53 is rotatable around the narrow neck portion 51 and can come into contact with the frame plate vertical member 56 from above or from the side.

Reference numeral 55 indicates a nail. Next, the effects of the present invention will be explained. According to the bar connecting structure of the present invention, a vertical bar such as the anchor reinforcing bar 41 and a horizontal bar such as the connecting reinforcing bar 42 can be firmly connected with a single touch using the relatively inexpensive connecting fitting 1. For example, when assembling formwork for large concrete structures such as dams, work efficiency can be greatly improved, construction time can be shortened, and formwork assembly costs can be reduced. has a remarkable effect.

Further, in the present invention, the window holes 7, 7 of the bar receiving member 2 are formed vertically so that the connecting reinforcing bars 42 can be individually identified within the range of the window holes 7, 7 at an appropriate angle. Therefore, when using this bar connection structure for fixing a concrete formwork, for example, by tilting the connecting reinforcing bars 42, one end side 42a of the connecting reinforcing bars 42 can be connected over a wide range in the height direction of the frame plate. This has the effect that the formwork can be firmly assembled.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a conventional method of assembling a large formwork, Fig. 2 is a perspective view showing a bar connection state using the bar connection structure of the embodiment of the present invention, and Fig. 3 is the bar connection structure of Fig. 2. , FIG. 4 is a perspective view showing the separated state of the bar connection member shown in FIG. 2, FIG. 5 is an explanatory diagram of how to use the bar connection structure shown in FIG. 2, and FIG. FIG. 7 is an enlarged view of section A in FIG. 6. 1... Connection fittings, 2... Bar receiving member,
3...Wedge, 4...Side plate, 5...
...Vacancy, 6...Guide groove, 7...
Window hole, 8... Rear end, 31... Frame plate,
41... Anchor reinforcing bar, 42... Connecting reinforcing bar, 43... Male thread, 44... Uneven portion.

Claims (1)

[Scope of utility model registration request] A vertical bar such as an anchor reinforcing bar 41 is inserted in the vertical direction between two side plates 4, 4, which have a vertically long window hole 7 in the center of the dowel, through which a horizontal bar such as a connecting reinforcing bar 42 can be passed in a horizontally inclined state. a tightening member 3 for pressing the vertical bar 41 forward on the rear side of the side plates 4, 4, and
are provided to constitute the bar receiving member 2, while the side plates 4,
The horizontal bar 42 is inserted into the window holes 7, 7 from the side direction.
and the vertical bar 41 fitted vertically into the space 5 between the side plates 4, 4, are made to intersect with each other within the bar receiving member 2, and the tightening member 3 is used to tighten both the bars. Material 41.4
A bar connection structure characterized in that 2 is fixed by crimping.