JP2019019552A - Bar arrangement spacer and steel bar supporting structure using bar arrangement spacer - Google Patents

Abstract

To provide a bar arrangement spacer and a steel bar supporting structure using bar arrangement spacer with excellent workability and reliability which allows position adjusting operation to be unnecessary by restricting movement of a deck plate in a width direction and allows operation to be performed without troubles even in a case an error is created associating with extending the deck plate in a width direction.SOLUTION: For a bar arrangement spacer 1 to be used to arrange a bar in a concave part when a concrete slab is constructed by filling concrete on a deck plate 10 configured to be curve-formed in a corrugated form section like a general trapezoid through alternatively overlapping convex parts and concave parts respectively, flat parts 2 positioned on upper surfaces of the convex parts and generally V-shaped groove parts 3 to respectively arrange steel bars in the concave parts are alternatively curve-formed, and one end part 1a of one rod of one straight member is curved-formed along the convex parts and an upper part of a taper part consecutively arranged on both sides of that, and the other end 1b is formed in a free state.SELECTED DRAWING: Figure 1

Description

  In the present invention, when a concrete slab is constructed by placing concrete on a deck plate having a configuration in which crests and troughs are alternately connected via inclined portions and bent into a substantially trapezoidal corrugated cross section, The present invention belongs to the technical field of bar arrangement spacers used for arranging reinforcing bars in the parts.

Techniques for arranging reinforcing bars (for example, D13 fireproof reinforcing bars) in the valleys of the deck plate having the above-described configuration are typified by the following two types.
(1) A construction method in which a single member such as a concrete dice is placed on the upper surface of the valley portion of the deck plate, and a reinforcing bar is placed thereon to support it (hereinafter referred to as a single construction method).
(2) For example, as shown in FIG. 11 and Patent Documents 1 and 2 of the present application, a single bar material (wire material) in which a groove portion is formed in a portion corresponding to a valley portion of the deck plate is replaced with the width direction of the deck plate ( (Turn direction), and installs and supports a reinforcing bar in the said groove part (henceforth a bar method).

Japanese Utility Model Publication No. 58-156815 Design Registration No. 661736

  In the case of the single construction method (1) described above, for example, if it is carried out in a large store or warehouse having a large floor area of about 30,000 square meters, about 3000 individual members are required. Therefore, the cost and the labor (labor) for arranging at a predetermined position are required, and the economical efficiency and workability are not good.

In the case of the bar construction method (2), a single bar material can support a plurality of reinforcing bars, so that the number of pieces used (number of pieces used) can be reduced as compared with the single member, and it is not bulky, so that it is easy to construct, economical and loadable. It is easy to handle.
However, when the both end portions of FIG. 11 described above are implemented by the free bar material a, the movement of the deck plate b in the width direction (displacement movement) cannot be constrained. There was a problem that had to be improved in terms of workability and certainty, such as being unavoidably forced and causing variations in the positioning adjustment by the operator's sense.
Moreover, when it implements with the bar material which provided the latching part in both ends of patent documents 1, 2, although the said shift movement can be restrained, by the error (cumulative error) accompanying the addition to the width direction of a several deck plate However, a new problem has arisen, such as a situation in which one of the hooks is fitted but the other hook is not fitted.

  The present invention has been devised in view of the problems of the background art described above, and the object of the present invention is to employ a bar method that is superior in workability, economy, and load handling properties to the single method. In addition, it is possible to use positioning adjustment work by restraining the movement of the deck plate in the width direction, and it is possible to work without any trouble even if an error due to the addition of the deck plate in the width direction occurs. An object of the present invention is to provide a reinforcing bar spacer and a reinforcing bar support structure using the reinforcing bar spacer, which are excellent in workability and reliability.

As means for solving the above problems, the spacer for bar arrangement according to the invention described in claim 1 is formed such that peaks and valleys are alternately connected via an inclined portion and bent into a substantially trapezoidal corrugated cross section. When constructing a concrete slab by placing concrete on a deck plate having a structure, a bar arrangement spacer used for arranging reinforcing bars in the valleys,
A flat portion on the upper surface of the peak portion and a substantially V-shaped groove portion for arranging a reinforcing bar in the valley portion are alternately bent and formed by one wire, and one end portion of the one wire However, it is formed by bending so as to extend along the mountain portion and the upper portion of the inclined portion continuously provided on both sides thereof, and the other end portion is formed in a free state.

According to a second aspect of the present invention, in the bar arrangement spacer according to the first aspect, the deck plate further includes a slope portion and a jaw portion that are continuously provided on the slope portions on both sides of the peak portion. When the configuration is provided with a bowl-shaped step portion,
One end portion of the one wire is bent and formed along the mountain portion and the slope portions of the bowl-shaped step portions on both sides thereof.

  According to a third aspect of the present invention, in the bar arrangement spacer according to the second aspect, the tip of one end of the one wire is bent to a hook portion that can be hooked to the jaw portion of the bowl-shaped step portion. It is formed.

  The invention described in claim 4 is the reinforcing bar spacer according to any one of claims 1 to 3, wherein the other end portion of the one wire is formed in the flat portion. And

  According to a fifth aspect of the invention, in the bar arrangement spacer according to any one of the first to fourth aspects, the number of the flat portions is four and the number of the substantially V-shaped groove portions is three. Or the number of the flat portions is three and the number of the substantially V-shaped groove portions is bent to two.

The reinforcing bar support structure using the reinforcing bar spacer according to the invention described in claim 6 is the reinforcing bar supporting structure according to any one of claims 1 to 5, wherein the reinforcing bar spacer is arranged in the width direction of the laid deck plate. Being continuously arranged in a state of being partially wrapped,
Reinforcing bars in the span direction of the deck plate are supported at the bottom of the substantially V-shaped groove of the bar arrangement spacer.

  According to the reinforcing bar spacer and the reinforcing bar support structure using the reinforcing bar spacer according to the present invention, since the bar method is used, the construction method, the economical efficiency, and the load handling property are superior to the single method. In addition to this, the arrangement is made in a free state where one end of the bar arrangement spacer is hung on the peak of the deck plate while the other end is not hung on the deck plate, so the movement of the deck plate in the width direction is restricted. Thus, the positioning adjustment work can be made unnecessary, and even if an error (cumulative error) due to the addition of the deck plate in the width direction occurs, the work can be performed without any trouble. Therefore, it is possible to realize the reinforcing bar spacer and the reinforcing bar support structure using the reinforcing bar spacers, which are extremely excellent in workability and reliability, and thus to construct a high-quality concrete slab.

It is the front view which showed the reinforcing bar support structure using the spacer for bar arrangement concerning Example 1. FIG. It is the front view which showed the spacer for bar arrangement concerning Example 1. FIG. It is the perspective view which showed the arrangement | positioning condition of the spacer for bar arrangement concerning Example 1. FIG. It is the front view which showed the reinforcing bar support structure using the spacer for bar arrangement concerning Example 2. FIG. It is the front view which showed the spacer for bar arrangement concerning Example 2. FIG. It is the perspective view which showed the arrangement | positioning condition of the spacer for bar arrangement concerning Example 2. FIG. It is the front view which showed the reinforcing bar support structure using the spacer for bar arrangement concerning Example 3. FIG. It is the front view which showed the spacer for bar arrangement concerning Example 3. FIG. It is the perspective view which showed the arrangement | positioning condition of the spacer for bar arrangement concerning Example 3. FIG. A and B are the front views which showed the variation of the spacer for bar arrangement. A is a front view showing a reinforcing bar support structure using a reinforcing bar spacer according to a conventional example, and B is a front view showing the reinforcing bar spacer.

  Next, an embodiment of the reinforcing bar support structure using the reinforcing bar spacer and the reinforcing bar spacer according to the present invention will be described with reference to the drawings.

As shown in FIG. 1 to FIG. 3, the bar arrangement spacer 1 according to the present invention is a deck having a configuration in which peaks and valleys are alternately connected via an inclined portion and bent into a substantially trapezoidal corrugated cross section. When the concrete is placed on the plate 10 to construct the concrete slab, the bar arrangement spacer 1 is used to arrange a reinforcing bar 11 (for example, a fireproof reinforcing bar) in the valley.
This bar arrangement spacer 1 is an abbreviation for arranging a reinforcing bar 11 in the flat portion 2 placed on the upper surface of the peak portion and the trough portion with one wire rod (for example, a soft steel wire rod of about φ4 to 5 mm). The V-shaped groove portions (concave groove portions) 3 are alternately bent and formed, and the one end portion 1a of the one wire is bent so as to be along the mountain portion and the upper portion of the inclined portion continuously provided on both sides thereof. The other end 1b is formed in a free state.
In the present specification, the “free state” refers to a state in which the deck plate is not formed so as to be hookable.

  Specifically, the reinforcing bar spacer 1 has a flat part 2 having a length equal to or slightly longer than the peak part and a substantially V-shaped groove part 3 for arranging a reinforcing bar 11 in the valley part. The other end portion 1b is formed in the flat portion 2 while the other end portion 1b is bent so as to sandwich (hold) the peak portion of the corresponding deck plate 10. Has been implemented in the configuration. The substantially V-shaped groove 3 is bent into a V shape with a structural design that can support the reinforcing bar 11 in a hollow manner at a predetermined height (for example, about 45 mm from the valley).

When the bar arrangement spacer 1 having the above-described configuration is disposed at the peak portion of the deck plate 10, the one end portion 1a is hung on the corresponding peak portion of the deck plate 10, and the flat portion 2 of the other end portion 1b is secured. It is simply placed on the upper surface of the peak portion of the corresponding deck plate 10.
As a result, the bar arrangement spacer 1 is suspended so that the one end 1a sandwiches the peak portion of the deck plate 10 even when the other end 1b is in a free state. ) Does not slide even when an external force is applied thereto, and thus the positioning adjustment work in the width direction of the deck plate 10 can be made useless.
Further, since the other end portion 1b of the bar arrangement spacer 1 is implemented in a free state in which the flat portion 2 is simply placed on the peak portion, an error (cumulative error) associated with the addition of the deck plate 10 in the width direction. It can be placed on the mountain smoothly without any influence.

By the way, the dimensions of the deck plate 10 according to FIG. 1 are about 700 mm in width (three mountain types), about 75 mm in height (mountain height), about 112 mm in width on the flat surface of the mountain, The width is about 88 mm, the plate thickness is about 1.0 to 1.6 mm, and the total length (span length) is about 1.8 to 3.6 m.
Of course, the form (shape and size) of the deck plate 10 is not limited to this, and the design is appropriately changed according to the structural design such as the installation interval of the beam members and the strength required for the structure. In other words, the form of the deck plate 10 to which the bar arrangement spacer 1 according to the present invention is applicable can be applied to any form as long as it is formed by bending the substantially trapezoidal corrugated cross section. .
For example, in recent years, there is an increasing demand for the deck plate 10 that is provided with a composite mechanism such as embossing, a key groove, or a bowl-shaped stepped portion so as to improve the fixing property with the cast concrete. The bar arrangement spacer 1 can be applied to a deck plate (for example, see FIGS. 4, 7, and 10 described later) that has been subjected to the synthesis mechanism, or a deck plate that has not been subjected to the synthesis mechanism (for example, The present invention can also be applied to FIG. 1 and FIG.

Thus, in the reinforcing bar support structure using the bar arrangement spacer 1 having the above-described configuration, the bar arrangement spacer 1 is arranged in the width direction of the deck plate 10 laid in a large number between beams in a predetermined region (not shown for convenience). As shown in FIG. 3, the substantially V-shaped groove part 3 for arranging the reinforcing bars 11 is continuously arranged in a partially wrapped state so as not to be interrupted.
A reinforcing bar 11 directed in the span direction of the deck plate 10 is supported on the bottom of the substantially V-shaped groove 3 of the plurality of reinforcing bar spacers 1 disposed in the predetermined region.

The bar arrangement spacer 1 can be positioned automatically only by hooking one end portion 1a thereof to the corresponding peak portion of the deck plate 10, so that a simple and satisfactory arrangement work can be performed. Incidentally, although not shown in the figure, the spacers 1 for bar arrangement are arranged substantially in parallel in the span direction of the deck plate 10 with a pitch of about 0.5 to 1.0 m, for example.
Further, since the bar arrangement spacer 1 is automatically positioned only by being hooked to the peak portion of the deck plate 10, a plurality of bar arrangement spacers arranged in the span direction for supporting the reinforcing bars 11 in common. 1 (substantially V-shaped groove 3) coincides so as to overlap when viewed along the span direction. Therefore, it is possible to reliably perform the bar arrangement work of the rebar 11 with high accuracy.

  After constructing the reinforcing bar support structure having the above-described configuration, the reinforcing bar 11 and the bar arrangement spacer 1 are appropriately bound with a binding material such as a steel wire, and a welded wire mesh or other part is attached from the upper surface of the concrete to a portion having a cover thickness of about 30 mm. A crack expansion prevention bar such as a diameter reinforcing bar is arranged, and then concrete is placed to construct a concrete slab.

4 to 6 show different embodiments of the reinforcing bar support structure using the reinforcing bar spacers 21 and the reinforcing bar spacers 21.
The bar arrangement spacer 21 according to the second embodiment has three to four flat portions and two substantially V-shaped groove portions as compared to the bar arrangement spacer 1 according to the first embodiment. The number of points has been increased to three, and the length has been increased accordingly, and the design has been changed slightly due to the change from the deck plate 10 not having the synthesis mechanism to the deck plate 20 having the synthesis mechanism. The concept of what is different is the same as in the first embodiment.
That is, the bar arrangement spacer 21 according to the second embodiment is similar to the first embodiment in that the flat portion 22 placed on the upper surface of the peak portion of the deck plate 20 and the reinforcing bar 11 in the valley portion are formed by one wire rod. The substantially V-shaped groove portions 23 for arranging the bars are alternately bent and formed, and the one end portion 21a of the one wire rod is formed at the upper portion of the slope portion and the inclined portion continuously provided on both sides thereof. And the other end portion 21b is formed in a free state (flat portion 22) along the slope portion of the bowl-shaped step portion 20a including the slope portion and the jaw portion.

  Incidentally, FIG. 4 shows an example in which two deck plates 20 of the same type are added, and the dimensions of each deck plate 20 are about 600 mm in width (two mountain types) and about 92 mm in height (mountain height). The width of the flat part of the mountain part is about 142 mm, the width of the flat part of the valley part is about 100 mm, the plate thickness is about 1.0 to 1.6 mm, and the total length (span length) is about 1.8 to 3.6 m. Has been implemented in.

In the case where the bar arrangement spacer 21 according to the second embodiment is disposed on the peak portion of the deck plate 20, the same procedure as in the first embodiment is performed. That is, one end portion 21 a of the bar arrangement spacer 21 is hung on the corresponding peak portion of the deck plate 20, and the flat portion 22 of the other end portion 21 b is simply placed on the upper surface of the corresponding peak portion of the deck plate 20.
Then, even if the other end portion 21b is in a free state, the bar arrangement spacer 21 is suspended so that the one end portion 21a sandwiches the peak portion of the deck plate 20, so that an external force is applied in the width direction of the deck plate 20. Even if it acts, it does not slide, so that the positioning adjustment work in the width direction of the deck plate 20 can be made unnecessary.
Further, since the other end portion 21b of the bar arrangement spacer 21 is implemented in a free state in which the flat portion 22 is simply placed on the peak portion, an error (cumulative error) associated with the addition of the deck plate 20 in the width direction. It can be placed on the mountain smoothly without any influence.

The reinforcing bar support structure using the reinforcing bar spacer 21 having the above-described configuration is the same as that in the first embodiment. That is, in the width direction of the deck plate 20 laid between a plurality of beams in a predetermined region, the reinforcing spacer 21 has a substantially V-shaped groove portion 23 for reinforcing the reinforcing bar 11 as shown in FIG. It arrange | positions continuously in the state wrapped partially so that it may not interrupt.
The reinforcing bars 11 in the span direction of the deck plate 20 are supported on the bottoms of the substantially V-shaped groove portions 23 of the plurality of reinforcing bar arrangement spacers 21 arranged in the predetermined region.

Since the bar arrangement spacer 21 can be automatically positioned by simply hooking its one end 21a to the peak portion of the corresponding deck plate 20, a simple and satisfactory arrangement work can be performed.
Further, since the bar arrangement spacer 21 is automatically positioned only by being hooked to the peak portion of the deck plate 20, a plurality of bar arrangement spacers arranged in the span direction for supporting the reinforcing bar 11 in common. 21 (substantially V-shaped groove portion 23) coincides so as to overlap when viewed along the span direction. Therefore, it is possible to reliably perform the bar arrangement work of the rebar 11 with high accuracy.

  After constructing the reinforcing bar support structure having the above-described configuration, the reinforcing bar 11 and the bar arrangement spacer 21 are appropriately bound with a binding material such as a steel wire, and a welded wire mesh or other part is provided from the upper surface of the concrete to a cover thickness of about 30 mm. A crack expansion prevention bar such as a diameter reinforcing bar is arranged, and then concrete is placed to construct a concrete slab.

  As shown in FIGS. 7 to 9, the tip of the one end portion 21a of the bar arrangement spacer 21 is bent (extended) on the hook portion 4 that can be hooked on the jaw portion of the bowl-shaped step portion 20a. ), The one end of the bar arrangement spacer 21 ′ can be more securely hooked to the peak portion of the corresponding deck plate 20, and therefore the bar arrangement spacer 21 ′. The reliability and reliability with respect to the arrangement work can be further improved.

Although the embodiments have been described with reference to the drawings, the present invention is not limited to the illustrated examples and includes a range of design changes and application variations that are usually made by those skilled in the art without departing from the technical idea thereof. To mention just in case.
For example, the bar arrangement spacers according to the present invention are not limited to the bar arrangement spacers 1, 21, 21 ′ according to the first to third embodiments, but the bar arrangement spacers 31 and 31 ′ illustrated in FIG. The design can be freely changed according to the form of the deck plates 30 and 30 'to be laid. Incidentally, the bar arrangement spacers 31 and 31 ′ according to FIG. 10 are carried out by a technique in which one end portions 31 a and 31 a ′ are hung on the left mountain portion of the deck plate 30, contrary to the first to third embodiments. doing.

DESCRIPTION OF SYMBOLS 1 Bar arrangement spacer 1a One end part 1b The other end part 2 Flat part 3 Substantially V-shaped groove part 4 Hook part 10 Deck plate 11 Reinforcing bar 20 Deck plate 20a Saddle-shaped step part 21 Bar arrangement spacer 21 'One end part 21b Other end part 22 Flat part 23 Substantially V-shaped groove part 30 Deck plate 30 'Deck plate 30a Saddle-shaped step part 31 Bar arrangement spacer 31' Bar arrangement spacer 31a One end part 31b The other end part 31a 'One end part 31b' The other end Part 32 flat part 33 substantially V-shaped groove part

Claims (6)

When constructing a concrete slab by placing concrete on a deck plate having a configuration in which crests and troughs are alternately connected through inclined portions and bent into a substantially trapezoidal corrugated cross section, reinforcing bars are placed in the troughs. A bar arrangement spacer used for bar arrangement,
A flat portion on the upper surface of the peak portion and a substantially V-shaped groove portion for arranging a reinforcing bar in the valley portion are alternately bent and formed by one wire, and one end portion of the one wire However, the bar arrangement spacer is formed so as to be bent along the mountain portion and the upper portion of the inclined portion continuously provided on both sides thereof, and the other end portion is formed in a free state. When the deck plate has a configuration including a bowl-shaped step portion including a slope portion and a chin portion continuously provided on the slope portion on both sides of the mountain portion,
2. The bar arrangement spacer according to claim 1, wherein one end portion of the one wire is bent so as to be along the peak portion and the slope portions of the bowl-shaped step portions on both sides thereof. .   The reinforcing bar spacer according to claim 2, wherein a tip of one end of the one wire is bent at a hook portion that can be hooked to a jaw portion of the bowl-shaped step portion.   4. The bar arrangement spacer according to claim 1, wherein the other end portion of the one wire is formed in the flat portion. 5.   The number of the flat portions is four and the number of the substantially V-shaped groove portions is bent to three, or the number of the flat portions is three and the number of the substantially V-shaped groove portions is bent to two. The spacer for bar arrangement as described in any one of Claims 1-4 characterized by the above-mentioned. The spacers for bar arrangement according to any one of claims 1 to 5 are continuously arranged in a partially wrapped state in the width direction of the laid deck plate,
A reinforcing bar support structure using a reinforcing bar spacer, wherein a reinforcing bar facing the span direction of the deck plate is supported at the bottom of a substantially V-shaped groove portion of the reinforcing bar spacer.

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