JPS5940488Y2 - Reinforced spacer mounting structure - Google Patents

Description

[Detailed description of the invention] This invention makes it possible to fix the position of the reinforcing bars relative to the formwork and ensure the concrete cover thickness by using a formwork separator, for example, when double reinforcing bars are arranged in exterior wall concrete. This provides a reinforcing bar spacer mounting structure.

In general, in reinforced concrete exterior walls, incorrect positioning of reinforcing bars or insufficient covering thickness not only causes cracks, but can also lead to rusting of the reinforcing bars and a reduction in the structural strength of the building. .

For this reason, conventionally, for example, when double reinforcing bars are placed on an exterior wall, as shown in Fig. 1, while the inner and outer reinforcing bars are positioned relative to each other by stop bars a, the spacing between formwork A is defined by separators b. However, a disk-shaped spacer C that contacts the inner surface of the formwork A was fitted to the horizontal or vertical reinforcement to ensure the concrete cover thickness.

However, the conventional structure described above uses many types of members each having a single function, such as the stopper bar a, the separator b1, and the spacer 〇, which is not only disadvantageous in terms of cost, but also reduces the cost for the formwork A. Because the position of the reinforcing bars is insufficiently fixed, for example, the position of the reinforcing bars may shift due to impact during erection of formwork A or concrete pouring, or spacers ○ may come off and fall, making it impossible to obtain the required cover thickness. There are fewer cases where there is no such thing.

Furthermore, as shown in Japanese Utility Model Application Publication No. 54-32924, there is also a type in which it is attached to a formwork separator.

However, this is simply an inverted U-shaped reinforcing bar holder that is curved to follow the outer circumferential surface of the reinforcing bars and is attached to the formwork separator, and ensuring the concrete cover thickness is achieved by attaching the reinforcing bar holder to the formwork separator. A cutting groove (a break-off groove for cutting off the protruding end side of the separator after demolding) is provided behind the washer or cone that holds the formwork.

), an annular groove is formed on the separator at a distance corresponding to the concrete cover thickness, and the reinforcing bar holder is inserted into this annular groove.

Therefore, in this case, it is necessary to provide an annular groove in the separator in addition to the cutting groove, resulting in a special separator, which is disadvantageous in terms of cost.

Moreover, the required concrete cover thickness differs for each part of the building, so many types of separators are required per construction site, for example, a separator for a 25 mm cover thickness, a separator for a 30-room cover, etc.
The number of different types of separators has increased, making material management troublesome and greatly affecting workability.

It may also be possible to make the material management easier by marking the separator with marks such as 25-speed and 301n-, but in this case, the markings would be on the round steel part of the separator. Processing costs are high, leading to a significant increase in costs.

The present invention aims to eliminate the above-mentioned conventional drawbacks by making it possible to ensure concrete cover thickness by utilizing the cutting grooves originally provided in the formwork separator.

Therefore, the reinforcing bar spacer mounting structure of the present invention which achieves the above object has a plate part 1a which is curved to follow the outer peripheral surface of the reinforcing bar, and a plate part 1a having a length corresponding to the thickness of concrete covering which is bent at a substantially right angle from one end. A covering thickness regulating plate part l a/, a plate part 1b folded back at a substantially right angle from the plate part 1a' and having a notch 1d formed therein, and a plate part 1b connected linearly to the other end of the curved plate part 1a. A reinforcing bar spacer consisting of a plate part 1c with a notch 1e formed at a position facing the notch 1d is engaged with the formwork separator, and the notch 1d of the plate part 1b is engaged with the cutting groove of the formwork separator. In addition, it is characterized in that the notch 1e of the plate portion 1C is installed in a state in which it is engaged with the separator round steel portion that is located inside the cutting groove.

An embodiment of the present invention will be explained based on FIGS. 2 to 5. In the figure, 1 is a reinforcing bar spacer made by bending a metal plate cut into a predetermined shape. (or vertical reinforcement) 7 along the outer circumferential surface (curved plate part 1a, and a cover thickness regulating plate part l bent at right angles from one end toward the formwork A side and having a length corresponding to the concrete cover thickness) a/, a plate portion 1b folded back at a right angle from the plate portion la/, and a plate portion 1 in which the other end of the curved plate portion 1a is linearly extended to a position approximately equal to the tip position of the plate portion 1b.
c, and the plate portion 1b is provided with a formwork separator 2.
A cutout 1d that engages with a cutting groove 5 (provided over the entire circumference of the round steel 4) of the round steel 4 provided behind the nut-shaped washer 3 is provided in the extension plate portion 1C. Notches 1e that engage with the portions of the round steel 4 located inside the service grooves 5 are respectively formed.

In addition, elastically deformable pull-out prevention tongue pieces 1f... 1g... are formed at the entrance portions of the notches i d and 1 e, and the width of the entrance portion is the same as that of the cutting groove 5 and the round bar 4. is slightly smaller than the diameter of

6 in the figure is a vertical strip (or horizontal strip). As shown in FIG.
With the plate parts 1b and 1c on both end sides pressed against the separator 2, with the plate parts 1b and 1c on both ends pressed against the separator 2, one notch 1d is inserted into the cutting groove 5, and the other notch 1e is inserted into the round steel 4. attached in engagement with the part.

In this engaged state, the horizontal reinforcement (or vertical reinforcement) 2' is pressed and fixed against the round steel 4 portion of the separator 2 by the curved plate portion 1a.

Further, the circumference of the notch 1d and the side surface of the cutting groove 5 are in contact with each other,
Since the reinforcing bar spacer 1 is prevented from moving in the longitudinal direction of the round steel 4, the distance between the horizontal bar (or vertical bar) 2' and the formwork A is regulated, and the dimensions of the plate part 1b can be adjusted appropriately. Just by setting this, you can ensure the required concrete cover thickness.

Incidentally, similar positioning is performed on the other end side of the separator 2 using a reinforcing bar spacer of the same shape.
For the sake of symmetry with FIG. 4, illustrations and explanations have been omitted.

Further, in the above embodiment, the reinforcing bar spacer 1 is made of metal, but it can also be made of synthetic resin.

Figures 6 and 7 show synthetic resin cones 3 on both ends of round steel 4.
The cones 3' are connected to maintain the spacing of the formwork A, and the cones 3'
An embodiment will be shown in which the separator 2 is used in a formwork separator 2 in which mortar is filled in the concave portion of the concrete surface formed by the cone 3' after the cone 3' is removed.

In this embodiment, the thickness of the cone 3' is the same as that of the washer 3.
Therefore, in order to ensure the same covering thickness, it is necessary to cut out the plate part 1 in which the notch 1d is formed from the curved plate part 1a.
It is necessary to make the dimension up to c shorter than that in the previous embodiment.

Further, the entrance portion of the notch 1d is the notch 1 in the previous embodiment.
Although the direction is perpendicular to the direction of the entrance portion of d, these directions can be set arbitrarily.

As described above, by using the reinforcing bar spacer mounting structure of the present invention, it is possible to secure the required concrete cover thickness at the same time as fixing the position of the reinforcing bars relative to the formwork, thereby improving the quality of the frame. The frame separator is
Since it is used both as a member for positionally fixing the reinforcing bar spacer with respect to the formwork and as a stop bar, it is possible to reduce costs.

In particular, the reinforcing bar spacer mounting structure according to the present invention has a cover thickness regulating plate part 1 having a length corresponding to the concrete cover thickness.
a' is provided, and the notch 1d of the plate part 1b folded back at a substantially right angle from the plate part 1a' is inserted into the cutting groove of the separator to ensure the concrete covering thickness. There is no need to process a special annular groove, and an ordinary separator can be used as is, which is advantageous in terms of cost and facilitates material management.

Furthermore, even when marking the length of the covering thickness regulating plate part, since it is a plate material, it is easy to process, which is also advantageous in terms of cost.

[Brief explanation of drawings]

Figure 1 is a reinforcement diagram for external wall concrete showing a conventional example, Figure 2
Figures to Figures 5 show an embodiment of the present invention, Figure 2 is a side view of the reinforcing bar spacer, Figure 3 is a view taken along the line ■-■ in Figure 2, and Figure 4 is IV-rV in Figure 2. 5 is a side view in the attached state, and FIGS. 6 and 7 are a perspective view and a side view in the attached state showing another embodiment. 1...Reinforcing bar spacer, 1a...Curved plate part, 1 a'...Plate part for regulating covering thickness, 1c.
・・・・・・Plate part, 1 d. 1e...Notch.

Claims (1)

[Scope of utility model registration request] A plate part 1a curved to follow the outer circumferential surface of the reinforcing bars, a cover thickness regulating plate part 1a' having a length corresponding to the concrete cover thickness bent from one end at a substantially right angle, and a plate part 1a' bent at a substantially right angle from the plate part 1a'. A plate portion 1b that is folded back and has a notch 1d formed therein.
and a plate part 1c linearly connected to the other end of the curved plate part 1a and having a notch 1e formed at a position facing the notch 1d, as a formwork separator, a reinforcing bar spacer,
The notch 1d of the plate portion 1b is engaged with the cutting groove of the formwork separator, and the notch 1e of the plate portion 1c is engaged with the separator round steel portion inside the cutting groove. A reinforcing bar spacer mounting structure characterized by: