JPS63280105A - Wire distributing spacer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a reinforcement spacer used when constructing a composite slab by pouring concrete onto a deck plate.

[Conventional technology] When constructing a composite slab by laying a deck plate on a beam and using it as a formwork for pouring concrete, reinforcing is arranged before pouring the concrete. The practice is to place spacers and place reinforcing bars on top of the spacers. Conventionally, as this type of spacer, as shown in FIG. FA9, a spacer block 1 made of concrete or resin is used, which is provided with a groove 1a for placing reinforcing bars. When placing reinforcement, as shown in Figure 10,
The spacer blocks 1 were placed on the deck plate 2 at intervals of, for example, 1 m, and on top of the spacer blocks 1, welded wire mesh 3 of wire diameter 6LIII 111 knit 0 size 150 m 111 etc., which had been manufactured in advance at a factory, was placed as a reinforcing bar. .

The above-mentioned spacer block 1 is widely used in the case of a general deck plate with a simple wave-shaped cross section, but like the deck plate 2 shown in the figure, which has recently started to be used, it is A pair of key parts symmetrically bent inward, such as a pair of key parts 2b formed with a square, a pair of keys 81S2e formed on both sides of a dovetail part 2d at the center of the valley part 2C, etc. It is also used in the case of a deck plate with a cross-sectional shape.

[Problems to be Solved by the Invention] In the conventional spacer block 1 described above, the deck plate 2
Since it is simply placed on top, it lacks stability and may shift position or even fall into the valley 2c, and when the welded wire mesh 3 is placed on it, it cannot be supported and the welding There are cases where the wire mesh 3 comes directly onto the deck plate 2. As a result, the concrete cover thickness (the depth from the concrete surface to the reinforcing bars) becomes inappropriate, causing cracks to occur in the concrete. For this reason,
When placing the welded wire mesh 3, it must be checked whether the spacer block 1 is actually supporting the spacer block 1, and if it is misaligned, it must be reworked, which is extremely complicated. It also has the disadvantage of being heavy and bulky, making it difficult to handle.

This invention was made in view of the above circumstances, and provides a spacer for rebar arrangement that can securely support reinforcing bars without causing any displacement when placed on a deck plate, and is easy to handle. The purpose is to obtain.

Means for Solving Problem E] The present invention to solve the above problem consists of pouring concrete onto a deck plate having a cross-sectional shape having a pair of key portions bent in a symmetrical shape (11). A reinforcing spacer used when constructing a synthetic slab, which is formed by bending a wire, and includes a central convex portion, flat portions on both sides of the central convex portion that rest on the deck plates, and the pair of deck plates. one leg having an inward fitting part that elastically fits into each key part; a horizontal part extending in a horizontal direction orthogonal to the leg and fixed to the leg; and a horizontal part fixed to the leg. This is a spacer for reinforcing reinforcement consisting of a support bar having a support part that falls down on at least one end side of the support bar and rests on the deck plate.

[Operation] When placing the spacer for reinforcing with the above configuration on the deck plate, the fitting parts at both ends of the legs are fitted into a pair of symmetrical key parts of the deck plate, and the reinforcement is placed on the deck plate. The muscle spacer is placed on the deck plate in a stable fixed state without displacement due to the elastic force of the wire. In this case, the fallen support portion of the support noi serves to stably stand the spacer. The horizontal portion of the support bar supports reinforcing bars such as welded wire mesh.

[Example 1] Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 9.

Figure f51 to Figure pJS4 show the first embodiment. Figure 1 is a perspective view, Figure 2 is a front view, Figure 3 is m-1I of PIS2 diagram.
The IUA sectional view and FIG. 4 are usage state diagrams. A reinforcing spacer (hereinafter simply referred to as a spacer) 10 of this embodiment includes one leg 11 and one support bar 12 orthogonal to the leg 11.

The leg ff1S11 is formed by bending a single wire rod, and is formed on the central protrusion g11a, the flat parts 11b on both sides of this protrusion 11a, and the oblique sides on both sides of the peak part 2a of the deck plate 2. A fitting part 11c that fits into the key part 2b
It has The height of the convex portion 11a is set to a predetermined dimension according to the thickness of the concrete to be poured (usually about 85II1m to 11001I) and the concrete thickness (usually about 301I).

Further, the inner end portions (arrow (A) portions) of the fitting portions lie on both sides are arranged so that when the leg portion 11 is pushed into the ridge portion 2a of the deck plate 2, it smoothly fits into the key portion 2b.
The inner dimension 1 (see figure fls1) of the left and right fitting parts 11c is slightly narrower than the distance III (see figure 2) between the outer sides of the lock part 2b, and the fitting part li
e is adapted to elastically fit into the key portion 2b. Further, the support bar 12 has a horizontal portion 12 [I extending in the horizontal direction perpendicular to the leg portion 11 and fixed by welding to the center shaft of the convex portion 11a of the leg portion 11, and a horizontal portion 12 [I] that extends downwardly at one end side of the horizontal portion 12a. It has a flat support portion 121 which rests on the deck plate 2.

When placing the dry spacer 10 on the deck plate 2, align the legs 11 with the peaks 2a of the deck plate 2 and push them in from above, as shown in Figure i2, the left and right fitting parts 11c will fit on the oblique sides. It is elastically fitted into the key part 2b of the wire rod, and the peak part 2a is strongly held from the left and right sides by the elastic force of the wire. In this way, the spacer 10 is fixed to the deck plate 2 and does not move in the width direction of the deck plate 2 or in the length direction of the deck plate 2. In this case, the support portion 12b of the support bar 12 rests on the deck plate 2 (in the embodiment, it fits into the groove in the center of the peak portion 2a), so the spacer 10 is connected to the flat portion 11b of the leg portion 11 at 2tM. It stands stably with the support part 12b of the bar 12 and has sufficient supporting force.

In addition, in the above spacer arrangement work, the spacer 10
It is light in weight and not bulky, so it is easy to handle.

In addition, the inner dimension l of the binocular contact part 11c is such that the leg part 11 can be pushed into the crest IIS 2a of the deck plate 2 with respect to the distance m between the outer sides of both the lock parts 2b, and the ridge part when pushed in. 2a is set so as to appropriately satisfy both the conditions of strong (pinching).

Place the above-mentioned spacer 10 on the deck plate 2 at a distance of, for example, 1 m.
After arranging the weld metal w43 in a manner similar to the spacing, weld metal w43 is laid in the same manner as in the past (see Fig. 2). In this case, the support bar 12 of the spacer 10 receives the welded wire mesh 3. This state is shown in FIG.

Since the spacer 10 does not shift as described above,
All the spacers 10 reliably support the welded metal mesh 3, and problems such as the welded metal ti43 directly riding on the deck plate 2 do not occur. As a result, it is possible to obtain a concrete thickness as designed that will not cause cracks.

FIG. 5 shows a second embodiment. Spacer 20 of this example
In this case, the leg part 11 is the same as that in the first embodiment, but the support bar 2 is
2 has one end 22c of the horizontal portion 22a bent in a downward arc shape, and further bent at a position near the leg 11,
The horizontal portion 22a on which the welded wire mesh 3 rests is lowered lower than the upper end surface of the leg portion 11.

In the above spacer 2o, the end portion 2 bent into an arc shape
2c improves workability when laying the welded wire mesh 3. That is, in the case of the spacer 10 shown in FIG. 1 having the support bar 12 whose horizontal portion 12a is straight, when laying the welded wire mesh 3,
There is a risk that the weld metal W43 may get caught on the edge of the horizontal portion 12a, but in the spacer 20 of this second embodiment, the edge 2
Since 2c is bent in a downward arc, there is no risk of it getting caught and it can be laid smoothly.

Further, by lowering the horizontal portion 22 & of the support bar 22, it is possible to easily adapt to different types of concrete thickness. In other words, if the concrete thickness changes, it is necessary to change the height of the spacer accordingly.
Since the shape of the support bar is simpler than the shape of the legs, it is easier to manufacture the shape of the support bar than to change the height of the legs. Lowering dimension h of horizontal portion 22a (see Figure 5)
For example, if you prepare several types within the range of about 15LIIIL, you can easily create a spacer of the desired height by selecting the appropriate size that corresponds to the concrete thickness and welding it to the leg 11. can.

Figure Pt56 to Figure tjS8 show the third embodiment. The spacer 30 of this embodiment similarly consists of one leg 31 and a support bar 32 welded to the leg. A fitting part 3 in which a flat part 31b extends inward, and both ends of the flat part 31b fit into a pair of hook parts 2e formed on both sides of a dovetail part 2d at the center of the valley part of the deck plate 2.
It is 1c.

The support bar 32 is similar to the embodiment of FIG. 1 and has a horizontal portion 32g and a support portion 32b.

The above spacer 30 can be assembled by pushing the leg portion 31 into the dovetail portion 2d at the center of the valley portion of the deck plate 2 from above, as shown in FIG.
As shown in the tjSB diagram, the left and right fitting portions 31c are elastically fitted into the key portion 2e, and the dovetail portion 2d is strongly clamped from the left and right sides by the elastic force of the wire rod. Further, the support portion 32b of the support bar 32 rides on the dovetail portion 2d to stabilize the spacer 30. In this way, the spacer 30
The deck plate 2 is fixed so that no displacement occurs.

In the third embodiment, as in the second embodiment shown in FIG.

FIG. 9 shows a fourth embodiment. Spacer 40 in this embodiment
The leg portion 11 is similar to that of the first embodiment (FIG. 1), but support portions 42b are provided at both ends of the horizontal portion 42a of the support bar 42, respectively.

According to the spacer 40 of this embodiment, stability is further improved. In addition, in the case of the spacer 30 of the third embodiment (FIG. 6), support portions can be similarly provided on both sides of the horizontal portion of the support bar.

Further, the deck plate to which the spacer of the present invention is directed is not limited to the deck plate 2 having the cross-sectional shape shown in the drawings, but may be any deck plate having a cross-sectional shape having at least a symmetrically bent IN key portion.

[Effect of the Invention 1 As explained above, according to the spacer of the present invention, the central convex portion, the flat portion that rests on the deck plate, and the portions of the pair of legs of the deck plate are elastically fitted into each other. One leg with an inward fitting part is provided, and a support bar having a horizontal part extending in a direction perpendicular to this leg and a support part placed on the deck plate is fixed to this leg. So,
When placed on the de-fuki plate, there is no fear of displacement, and it becomes possible to securely support the reinforcing bars, making it easier to ensure the specified concrete cover thickness. In addition, it is lightweight and not bulky, making it easy to handle and improve workability.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a Pt51 embodiment of the reinforcing spacer of the present invention, Fig. 2 is a front view of the same, and Fig. 13 is the ■-■ of Fig. 2.
4 is a front view of the spacer in use, FIG. 5 is a sectional view of the spacer showing the second embodiment, FIG. 6 is a perspective view of the third embodiment, and FIG. 7 is a front view of the same. Fig. 8 is a front view of the spacer in use, Fig. 9 is a perspective view of the spacer showing the fourth embodiment, and Fig. 9 is a perspective view of the spacer showing the fourth embodiment.
Figure 0 is a perspective view of a conventional spacer for reinforcing, and Figure @11 is an explanatory diagram of the state in which the conventional spacer for reinforcement is used. 2...Deck plate, 2b, 2e...Key part, 3
...Welded wire mesh (reinforcing bars), 10. 20, 30, 40... Spacers for reinforcement, 11.
31... Leg portion, lla, 31a... Convex portion, 11b,
31b...flat part, llc, 31c...fitting part, 1
2.22, 32.42...Support par, 12a, 22a
, 32a, 42a...horizontal part, 12+3, 22b-3
2b-42b...Support part.

Claims (1)

[Scope of Claims] A reinforcement spacer used when constructing a composite slab by pouring concrete onto a cross-sectional deck plate having a pair of key parts bent symmetrically inward, the spacer comprising: A central convex portion formed by bending a wire, flat portions on both sides of the central convex portion that rest on the deck plate, and inward fitting portions that elastically fit into the pair of key portions of the deck plate. a horizontal part that extends in a horizontal direction perpendicular to the leg and is fixed to the leg; and a support part that falls down at least on one end of the horizontal part and rests on the deck plate. A spacer for reinforcing reinforcement comprising a supporting bar.