JP2007332629A - Reinforcement receiving spacer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide reinforcement receiving spacers which each easily hold a reinforcement in one stage or reinforcements in upper and lower two stages as needed, readily hold reinforcements that intersect crosswise, at predetermined locations by a smaller number of the spacers, and indicate a finish surface height of concrete which is a cover portion on an upper side of the reinforcements. <P>SOLUTION: The spacer 1 is formed with a reinforcement holding means 6 for holding the upper reinforcement 7 and the lower reinforcement 8 at respective predetermined locations in a form, a seat plate 2a overhanging sideways from the reinforcement holding means 6, and height indicating means 2f for indicating a finish surface height of the concrete. The reinforcement holding means 6 is formed of an upper reinforcement holding means 5 formed like a groove opening toward the height indicating means 2f, and a lower reinforcement holding means 2c formed like a flat plate. Then the upper reinforcement holding means 5 and the lower reinforcement holding means 2c are arranged so as to be vertically shifted by a phase corresponding to an external dimension of the lower reinforcement 8. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  When building reinforced concrete structures such as solid foundations, cloth foundations, slabs, bridges, etc., the present invention holds the reinforcing bars arranged inside the concrete at a predetermined height, and between the reinforcing bars and the concrete outer surface. The present invention relates to a reinforcing bar receiving spacer used for setting a predetermined cover.

When building solid foundations and fabric foundations with reinforced concrete, the formwork is provided with reinforcing bars prior to placing the concrete. This rebar is held in advance by a spacer at a predetermined position in the formwork, and when the concrete is poured into the formwork and hardened, the required thickness between the rebar embedded in the concrete and the surface of the concrete, that is, By setting the cover and arranging the reinforcing bars at predetermined positions of the concrete, the strength required for the reinforced concrete structure is obtained.
As this kind of spacer used for reinforcing bar reception of a reinforced concrete structure, for example, a detachment preventing protrusion that engages with the reinforcing bar and prevents the reinforcing bar from being lifted is provided above the reinforcing bar holding part, The protrusions have a bar arrangement spacer provided with a plurality of types so as to correspond to a plurality of reinforcing bars having different diameters (for example, refer to Patent Document 1), and a seat plate placed on the ground surface. A lower spacer having an upper end formed with a first groove that holds the intersection of the lower stripes located on the lower side of the object, and the lower spacer that can be attached to the lower spacer from above, The second concave groove for holding the intersecting portion is formed at the lower end, and the double reinforcing bar spacer is composed of the upper adapter having the third concave groove for retaining the intersecting portion of the upper end muscle located on the upper end. For example, see Patent Document 2) It has been.

Furthermore, in the double bar arrangement spacer of Patent Document 2, the lower spacer is a hollow body, and the first groove is formed as four incisions formed in the upper end surface of the lower spacer with a central angle of approximately 90 degrees. The upper adapter is a hollow body that can be attached to the lower spacer, and the second concave groove is formed by four notches formed at the lower end surface of the upper adapter at a central angle of about 90 degrees, and the third concave groove is the upper part. It is assumed that four notches are provided in the upper end surface of the adapter with a central angle of approximately 90 degrees, and that the width of each notch constituting the first to third grooves is forced to a single reinforcing bar. It is set to the dimension which can be inserted, the depth of each notch part which constitutes the 1st crevice groove-the 3rd ditch is set more than the dimension which can accommodate two upper and lower rebars, In each notch part which comprises 1 ditch | groove-3rd ditch | groove, it offsets in the direction which inserts each rebar. A long groove extending downward from the lower spacer is provided in each of the four notches constituting the first groove, and a rod-shaped member having a size matching the required bar arrangement pitch is formed. It is also described that both ends are fitted into corresponding long grooves of the lower spacer adjacent to each other in the X direction or the Y direction so that the intersections of the reinforcing bars arranged in a lattice shape are indexed.
JP 2000-328718 A JP 2005-36558 A

  When constructing a reinforced concrete structure, the reinforcing bars are generally formed by crossing the upper and lower bars in a cross shape. However, the bar arrangement spacer described in Patent Document 1 is a reinforcing bar that is arranged in one direction. Therefore, in order to support the reinforcing bars in the other direction, the same spacers must be separately disposed by changing the direction by 90 degrees, and a large number of spacers are required. Further, in a reinforced concrete structure with a height, the reinforcing bars are arranged in two stages, the upper and lower bars, and in this case as well, it is necessary to use a large number of two types of spacers having different holding part heights.

On the other hand, the double bar arrangement spacer described in Patent Document 2 includes a cross-shaped concave groove that holds the crossing portion of the reinforcing bar in both the lower spacer and the upper spacer combined therewith. Since the upper and lower bars are not always orthogonal to each other because they are often used for extension, it is difficult to accommodate such a reinforcing bar in a concave groove having a predetermined shape.
In addition, the spacers of Patent Documents 1 and 2 only have a function of holding the reinforcing bar at a predetermined position in the formwork, and the concrete is finished to the required height in the concrete flowing work performed following the bar arrangement. In addition, there is an inconvenience that the position of the finished surface must be separately measured and displayed in the formwork.

  The present invention has been made against the background of such a situation, and the object of the present invention is to be able to easily hold one or two upper and lower bar arrangements as necessary and cross in a cross shape. It is an object of the present invention to provide a reinforcing bar receiving spacer that can easily hold a small number of reinforcing bars in a predetermined position, and at the same time, can display the height of the finished surface of concrete that is a cover above the reinforcing bars.

In order to achieve the above-described object, the reinforcing bar receiving spacer according to the first aspect of the present invention is a reinforcing bar holding that holds the upper and lower bars embedded in the reinforced concrete structure at a predetermined height in the formwork. Means, a seat plate projecting to the side of the reinforcing bar holding means, and a height display means indicating the finished surface height of the reinforced concrete structure, wherein the reinforcing bar holding means opens to the height display means. It is characterized by comprising a groove-shaped upper streak holding means and a flat bottom streak holding means.
In the reinforcing bar receiving spacer according to the second aspect of the invention, the upper bar holding means and the lower bar holding means of the first aspect of the invention are arranged such that the phase is shifted up and down by the outer dimension of the lower bar. It is a feature.

  According to a third aspect of the present invention, there is provided a reinforcing bar receiving spacer according to the present invention, comprising: a first spacer that holds a lower end bar embedded in a lower side of a reinforced concrete structure; and an upper end bar embedded in an upper side of the reinforced concrete structure. It is a combination with a second spacer, and the first spacer holds the lower streak composed of the upper lower streak and the lower lower streak intersecting the lower streak at a predetermined height in the formwork. Lower bar holding means, a seat plate that projects to the side of the lower bar holding means, and a height display means that indicates the finished surface height of the reinforced concrete structure when the lower bar is embedded in the reinforced concrete structure; And a connecting means detachably connected to the second spacer, wherein the lower end muscle holding means comprises a lower upper muscle upper muscle holding means and a lower lower muscle lower muscle holding means, and the lower upper muscle upper muscle holding means, Hand holding the lower muscle Is formed in a groove shape that opens in the height display means of the first spacer, and the other is formed in a flat plate shape. The second spacer is formed on the upper upper muscle and the upper upper muscle. Reinforced concrete structure when embedding the lower end bar and upper end bar in a reinforced concrete structure, and upper end bar holding means for holding the upper end bar which intersects with the lower upper bar at a predetermined height in the formwork A height display means for indicating the finished surface height, and a connecting means detachably connected to the first spacer, wherein the upper end muscle holding means is an upper upper upper muscle holding means and an upper upper lower muscle holding means. One of these upper muscle upper muscle holding means and upper muscle lower muscle holding means is formed in a groove shape opening in the height display means of the second spacer, and the other is formed in a flat plate shape. It is characterized by that.

  The reinforcing bar receiving spacer according to a fourth aspect of the present invention is the reinforcing bar receiving spacer according to the third aspect, wherein the lower end upper muscle holding means and the lower lower muscle holding means are the lower end lower muscle holding means. The upper dimension upper upper muscle holding means and the upper upper muscle holding means are arranged by shifting the phase of the upper muscle lower dimension up and down. It is characterized by being.

The reinforcing bar receiving spacer according to the first and second aspects of the invention is disposed at the intersection of the upper and lower bars, and when the bar arrangement is one stage, the reinforcing bar holding means of the spacer holds the groove-like upper bar. The means holds the upper line, and the flat lower line holding means holds the lower line.
The position of the upper muscle is regulated by the groove-shaped holding means that opens at the upper edge of the height display means, but the lower muscle holding means that intersects the upper muscle is flat and does not regulate the position of the lower muscle, Even if there is a slight deviation in the intersection between the upper and lower muscles, this is held while allowing it. Therefore, the arrangement work of the reinforcing bar crossing portion using the spacer can be performed easily, and since the work of binding the upper and lower bars by crossing them does not require accuracy, the binding work can be completed in a short time.

  Further, in the concrete pouring work into the mold performed following the bar arrangement work, the height of the finished surface of the concrete is determined using the spacer height display means. Since the height display means is provided for each of a plurality of spacers positioned at appropriate positions in the mold, fine height setting is often performed by students.

According to the third and fourth aspects of the present invention, the reinforcing bar receiving spacer can be used alone or in combination with the first and second spacers in the upper and lower direction, and the reinforcing bar in the mold is one-stage. The first spacer is used alone at the crossing part of the reinforcing bar, and when the bar arrangement in the mold is two-tiered, the first spacer and the second spacer are combined in the vertical direction and used at the crossing part of the reinforcing bar. It is done.
When the bar arrangement is one stage, the reinforcing bar holding means of the first spacer is such that the groove-like upper bar holding means holds the upper bar and the flat lower bar holding means holds the lower bar. Further, when the bar arrangement is in the upper and lower stages, the first spacer and the second spacer are combined in the upper and lower directions and used at the intersection of the upper and lower reinforcing bars. The upper bar holding means holds the lower bar upper bar, the flat lower bar holding means holds the lower bar lower bar, and the upper spacer holding means of the second spacer is the upper upper bar holding means of the groove. The upper muscle of the muscle is held, and the flat lower muscle holding means holds the lower muscle of the upper muscle.

  The position of each upper streak is regulated by a groove-shaped holding means that opens at the upper edge of the height display means, but the lower streak holding means that intersects the upper streak is flat and does not regulate the position of the lower streak Even if there is a slight shift in the intersection between the upper and lower muscles, this is allowed and retained. Therefore, the arrangement work of the reinforcing bar crossing portion using the spacer can be performed easily, and since the work of binding the upper and lower bars by crossing them does not require accuracy, the binding work can be completed in a short time.

Further, in the concrete pouring work into the mold performed following the bar arrangement work, the height of the finished surface of the concrete is determined using the spacer height display means. When the bar arrangement in the mold is one stage, the height display means of the first spacer is used, and when the bar arrangement in the mold is two stages up and down, the second spacer is combined above the first spacer. The height display means is used.
The height display means indicates the height of the concrete by placing a seat plate on the lower ground in the formwork and installing the spacer. The required concrete height is set by adjusting to one.

According to the reinforcing bar receiving spacer of the present invention, it is possible to easily hold one or two upper and lower reinforcing bars as required, and to easily hold a small number of reinforcing bars crossing in a cross shape at a predetermined position. can do.
In particular, the position of the upper muscle is regulated by the groove-shaped holding means, whereas the holding means for the lower muscle that intersects the upper muscle is a flat plate, and holds it without regulating the position of the lower muscle. The upper and lower bars are not orthogonal to each other, and even if there is a slight shift in the intersection, this is held while being allowed. Therefore, the arrangement work of the reinforcing bar crossing portion using the spacer can be performed easily, and the upper and lower bars are crossed so that the binding does not require accuracy, so that the binding work can be completed in a short time.

  Also, by placing a seat plate on the concrete ground and placing the spacer in the formwork, the spacer height display means shows the concrete finish height, so the concrete should be flush with the height display means. Finished surface can be obtained by simple work. Therefore, it is not necessary to measure the finished surface height at various points in the mold or to mark this on the mold or the like.

The best mode of the present invention will be described below with reference to the drawings.
1 and 2 show a first embodiment in which the present invention is applied to one-stage reinforcement, FIG. 1 is a perspective view showing a state in which a reinforcing bar receiving spacer holds the reinforcing bar, and FIG. 2 shows a construction state. FIG. 3 to FIG. 7 show a second embodiment in which the present invention is applied to a two-stage reinforcing bar, and FIG. 3 is an exploded perspective view of the first and second spacers for reinforcing bar reception. 4 is a perspective view showing a state in which the first spacer and the second spacer combined in the vertical direction hold the reinforcing bar, FIG. 5 is a sectional plan view of FIG. 4, FIG. 6 is a sectional side view of FIG. 7 is explanatory drawing which shows the reinforcement receiving spacer in a construction state.

A reinforcing bar receiving spacer 1 (hereinafter simply referred to as a spacer) of the first embodiment shown in FIGS. 1 and 2 has a horizontally long seat plate 2a and a cross-like shape in plan view standing at the center of the upper surface of the seat plate 2a. The base portion 2b, a flat plate-like lower streak holding means 2c placed flat on the upper surface of the base portion 2b, and a back plate 2d rising from the seat plate 2a on the back side of the base portion 2b are integrally formed of a synthetic resin material. is doing.
The seat plate 2a and the base portion 2b are provided with a plurality of rectangular through holes 3 that are both lightweight and have a binding property with the concrete 4. When the spacer 1 is embedded in the concrete 4, the concrete 4 passes therethrough. The spacer 1 can be firmly bonded to the concrete 4 by entering the hole 3.

  The back plate 2d is formed in a vertically long shape that connects the bases 2b and the back surfaces of the lower muscle holding means 2c, and further protrudes above the lower muscle holding means 2c, and is higher than the lower muscle holding means 2c of the back plate 2d. A narrow V-shaped groove is formed from the position to the center of the upper edge of the back plate 2d, and this V-shaped groove is formed as the upper streak holding means 5, and the back plate 2d left on both sides of the upper streak holding means 5 is formed. Are formed as arm pieces 2e and 2e, and the upper edges of the arm pieces 2e and 2e are formed as height display means 2f and 2f.

The upper bar holding means 5 and the lower bar holding means 2c constitute the reinforcing bar holding means 6 of the present invention. The upper bar holding means 5 holds the upper bar 7 with the semicircular arc shaped holding part 5a at the lowermost end, and the lower bar holding means 5c. The muscle holding means 2c is configured to hold the lower muscle 8 that intersects the lower side of the upper muscle 7 on the upper surface of the flat plate.
Reinforcing bars of the same thickness are used for the upper bar 7 and the lower bar 8, and the semicircular arc holding part 5 a of the upper bar holding means 5 and the upper surface of the flat plate of the lower bar holding means 2 c are one of these bars 7, 8. The phase is shifted up and down, and the upper and lower muscles 7 and 8 are moved upward when the intersection of the upper and lower muscles 7 and 8 is tied up and down with a binding line (not shown). Each of the muscle holding means 5 and the lower muscle holding means 2c is held by each other.

  FIG. 2 exemplifies a state in which the spacer 1 shown in FIG. 1 is embedded in the concrete 4 of the solid foundation. The thickness T1 of the flat portion (right side in FIG. 2) of the concrete 4 is 170 mm, When the outer dimension D of the reinforcing bar used for the lower bar 8 is 12 mm, the spacer 1 includes a spacer 1 extending from the lower surface of the seat plate 2a to the height display means 2f and 2f which are upper edges of the arm pieces 2e and 2e. The total height L1 is set to 170 mm, the height L2 from the lower surface of the seat plate 2a to the upper surface of the lower muscle holding means 2c is set to 70 mm, and the lower surface of the seat plate 2a to the lower surface of the semicircular arc holding portion 5a of the upper muscle holding means 5 The height L3 was set to 82 mm, and the dimension L4 between the lower surface of the semicircular arc holding portion 5a of the upper bar holding means 5 and the upper surface of the flat plate of the lower bar holding means 2c, that is, L3-L2 = rebar outer dimension D12 mm was set. Things are used.

  As shown in FIG. 2, the spacer 1 sized as described above includes a plurality of spacers 1 at the intersection of the upper and lower bars 7 with the seat plate 2 a placed on the base surface 9 within the solid foundation mold. Installed, the total height L1 from the ground surface 9 to the height display means 2f, 2f, the height L2 from the ground surface 9 to the upper surface of the lower bar holding means 2c, and the semicircular arc shape holding of the upper bar holding means 5 from the ground surface 9 A height L3 to the lower surface of the portion 5a, and a dimension L4 between the height L3 and the height L2 are set. The upper muscle 7 is held on the semicircular arc holding portion 5a of the upper muscle holding means 5, and the lower muscle 8 is held on the lower muscle holding means 2c.

After the spacer 1 is installed in this way, the upper muscle 7 and the lower muscle 8 are bundled up and down at a portion of a large number of intersecting portions with a binding line, and the upper muscle holding means 5 in the spacer 1 portion. The semicircular arc holding portion 5a at the bottom of the V-shaped groove holds the upper stripe 7 without backlash.
In the lower bar holding means 2c, the same dimension L4 (= 12 mm) as the outer dimension of the reinforcing bar is set between the upper bar holding means 5 and the semicircular arc shaped holding part 5a. The lower streak 8 can be satisfactorily disposed without causing unnecessary gaps or conversely lacking the layout size, and the lower streak holding means 2c is formed in a flat plate shape. Even when the lower muscle 8 is not used at right angles or when the lower muscle 8 is used after being added, these are allowed and the lower muscle 8 is held.

  Thus, after arranging the upper and lower bars 7 and 8 using the spacer 1, the concrete 4 is poured into the mold, and the concrete 4 is placed on the upper edges of the arm pieces 2 e and 2 e at the positions where the spacers 1 are installed. To the same height display means 2f, 2f. Thereby, the finished surface height of the concrete 4 is determined, and a predetermined fog is set between the upper and lower bars 7 and 8 and the upper surface of the concrete 4. The concrete 4 poured into the mold enters the through holes 3 of the seat plate 2a and the base 2b, and firmly fixes the spacer 1 at a predetermined position. Although not shown, a predetermined fog is set between the upper and lower bars 7 and 8 and both side surfaces of the concrete 4 by holding the upper and lower bars 7 and 8 using the spacer 1.

  The spacer 1 of the present embodiment can hold the upper bar 7 and the lower bar 8 to ensure a predetermined cover on the side surface of the concrete 4 and at the same time set the finished surface height of the concrete 4. Moreover, the height of the finished surface is set only by matching the pouring height of the concrete 4 with the height display means 2f and 2f when the concrete 4 is constructed following the arrangement of the upper bar 7 and the lower bar 8. Therefore, the conventional work such as measuring the finished surface height in advance at various points in the mold or marking it on the mold or the like becomes unnecessary.

Next, a second embodiment of the present invention will be described with reference to FIGS. Note that the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
The spacer 20 according to the present embodiment is a combination of a first spacer 21 for holding a lower bar embedded in the lower side of the reinforced concrete 4 and a second spacer 22 for holding an upper bar embedded in the upper side of the reinforced concrete 4. ing.

The first spacer 21 shown in FIG. 3 includes a horizontally long seat plate 2a, a planar quadrangular base portion 2g erected at the center of the upper surface of the seat plate 2a, and a flat plate placed flat on the upper surface of the base portion 2g as a top plate. The bottom lower muscle holding means 2h and the back plate 2d rising from the seat plate 2a on the back side of the base 2g are integrally formed of a synthetic resin material.
A plurality of rectangular through-holes 3 are provided in the lower half of the seat plate 2a and the base 2g, the lower end lower muscle holding means 2h, and the back plate 2d, respectively, to reduce the weight and enhance the binding property with the concrete 4. I am doing so.

  The back plate 2d is formed in a vertically long shape that rises from the back surface of the base portion 2g and protrudes upward from the lower lower muscle brace holding means 2h, and the rear plate 2d from above the lower lower muscle brace holding means 2h. A narrow V-shaped groove is formed over the center of the upper edge, and this V-shaped groove is formed as the lower-end upper muscle holding means 23, and the back plate 2 d left on both sides of the lower-end upper muscle holding means 23 is formed. The bifurcated arm pieces serve as connecting means 2i, 2i with the second spacer 22, and the upper edges of the connecting means 2i, 2i serve as height display means 2f, 2f.

The lower end upper muscle holding means 23 and the lower end lower muscle holding means 2h constitute a lower end muscle holding means 25, and the lower end upper muscle holding means 23 is the lowermost semi-arc-shaped holding portion 23a and the lower upper muscle upper muscle. 26, and the lower muscle lower muscle holding means 2h is configured to hold the lower muscle lower muscle 27 that intersects the lower side of the lower muscle upper muscle 26 on the upper surface of the flat plate.
The lower upper muscle 26 and the lower lower muscle 27 constitute the lower muscle 24. The lower upper muscle 26 and the lower lower muscle 27 are made of reinforcing bars having the same thickness. The semicircular arc shaped holding portion 23a of the lower upper muscle upper holding means 23 and the upper surface of the flat plate of the lower lower muscle lower holding means 2h shift the phase upward and downward by one of these lower upper muscle 26 and lower lower muscle 27. When the intersection of the upper lower muscle 26 and the lower lower muscle 27 is tied up and down with a binding line (not shown), the lower upper muscle 26 and the lower lower muscle 27 are connected to the lower muscle. Each of the upper muscle holding means 23 and the lower muscle lower muscle holding means 2h is held by each other.

The second spacer 22 shown in FIG. 3 is provided with connecting means 30b, 30b facing both sides of a vertically long substrate 30a, and the upper surfaces of the upper upper muscles are held on the flat upper surfaces of the connecting means 30b, 30b. 30c, 30c.
A V-shaped groove and a recessed groove are cut in the upper and lower portions of the central portion of the substrate 30a, the upper narrow V-shaped groove is formed as the upper end lower muscle holding means 32, and the lower elongated recessed groove is punched out. 33, and the upper edge of the substrate 30a serves as the height display means 30d, 30d.

The upper upper muscle holding means 30c, 30c and the upper lower muscle lower muscle holding means 32 and the lowermost semicircular arc shaped holding portion 32a constitute the upper muscle holding means 34 of the present invention, and the upper upper muscle holding means 30c. 30c holds the upper upper muscle 35, and the upper lower muscle 36 is held by the semicircular holding portion 32a at the lower end of the upper lower muscle 32.
The upper upper muscle 35 and the upper upper muscle 36 constitute an upper muscle 37, and the upper upper muscle 35 and the upper upper muscle 36 are made of reinforcing bars having the same thickness. The planes of the upper upper muscle holding means 30c, 30c and the semicircular arc shaped holding part 32a of the upper lower muscle holding means 32 are arranged by shifting the phase of one of the reinforcing bars 35, 36 up and down. When the intersection of the upper muscle 35 and the lower upper muscle 36 is tied up and down with a binding line (not shown), the upper upper muscle 35 and the upper upper muscle 36 are connected to the upper upper muscle holding means 30c, 30c and the semicircular arc-shaped holding part 32a of the upper lower muscle holding means 32 are each held without interruption.

  The upper half portions of the connecting means 30b, 30b are formed in a thick L shape in plan view, and the upper upper streak holding means 30c, 30c are set on the upper surface of the thick part. Further, the lower half of the connecting means 30b, 30b is formed in an L shape thinner in plan view than the upper half, and between the substrate 30a and the tip pieces of the connecting means 30b, 30b facing the substrate 30a. The housing grooves 38, 38 having the same thickness as the back plate 2d of the first spacer 21 are set.

The spacer 20 of the present embodiment configured as described above is used by combining the first spacer 21 and the second spacer 22 in the vertical direction when the reinforcement in the concrete 4 is two-staged, or arranged. In the case of a single line, it is possible to use only the first spacer 21 alone as in the spacer 1 of the first embodiment shown in FIG.
When the bar arrangement is in two stages, the second spacer 22 is positioned above the first spacer 21, and the connecting means 2 i and 2 i of the first spacer 21 are inserted into the receiving grooves 38 and 38 of the second spacer 22. By connecting the lower ends of the connecting means 30b, 30b of the second spacer 22 to the upper surface of the seat plate 2a of the first spacer 22, the connecting means 2i, 2i of the first spacer 1 are connected to the substrate 30a of the second spacer 22. The connecting means 30b and 30b facing each other hold the two, and both spacers 21 and 22 are connected. When disassembling the first and second spacers 21 and 22, the procedure is reversed.

FIG. 7 illustrates a state in which the first and second spacers 21 and 22 are used as the spacers 20 and embedded in the concrete 4 of the solid foundation, and the thickness T2 of the flat portion (right side in FIG. 7) of the concrete 4 is illustrated. When the outer dimension D of the reinforcing bar used for 200 mm, the lower upper muscle 26, the lower lower muscle 27, the upper upper muscle 35, and the upper upper muscle 36 is 12 mm, the first spacer 21 has the seat plate 2a. The total height L1 of the spacer 1 from the lower surface to the height display means 2f, 2f, which is the upper edge of the connecting means 2i, 2i, is 170 mm, and the height L2 from the lower surface of the seat plate 2a to the upper surface of the lower muscle lower muscle holding means 2h Is 70 mm, the height L3 from the lower surface of the seat plate 2a to the lower surface of the semicircular arc holding portion 23a of the lower upper muscular muscle holding means 23 is 82 mm, and the lower surface of the semicircular arc holding portion 23a of the lower muscular upper muscle holding means 23 And flat plate of 2h lower brace holding means 2h Dimensions L4 between the upper, that is, that sets the outer dimensions D12mm the L3-L2 = rebar used.
Further, the second spacer 22 has an overall height L5 of the second spacer 22 from the lower surface of the substrate 30a to the height display means 30d, 30d of 200 mm, and from the lower surface of the substrate 30a to the upper upper streak holding means 30c, 30c. The height L6 is 145 mm, the height L7 from the lower surface of the substrate 30a to the lower surface of the semicircular arc-shaped holding portion 32a of the upper lower muscle holding means 32 is 133 mm, and the height from the lower surface of the substrate 30a to the upper surface of the punch hole 33 What set the length L8 to 70 mm is used. Further, the same dimension L4 as the outer dimension D12 mm of the reinforcing bar is set between the upper upper muscle upper bar holding means 30c, 30c and the semicircular arc holding part 32a of the upper upper muscle lower bar holding means 32.

  The spacer 20 sized as described above has the seat 2a placed on the base surface 9 in the solid foundation mold, and the upper lower muscle 26, the lower lower muscle 27, and the upper muscle 37 of the lower muscle 24. A plurality of upper upper muscles 35 and lower upper muscles 36 are installed at the intersections, and the above-described heights L1 to L8 are set from the base surface 9, respectively. The lower end upper muscle holding means 23 holds the lower end upper muscle 26, the lower lower muscle lower holding means 2 h holds the lower lower muscle 27, and the upper end holding means 34 further holds the upper end of the upper muscle holding means 34. The upper upper muscle 35 is held by the upper muscle holding means 30c and 30c, and the upper lower muscle 36 is held by the semicircular arc shaped holding portion 32a of the upper lower muscle holding means 32.

After the spacer 20 is installed in this manner and the holding means 23, 2h, 30c, 30c, 32a hold the lower end stripe 24 and the upper end stripe 37 in two upper and lower stages, some of the intersections are bound together. A plurality of holding means 23, 2h, 30c, 30c, and 32a hold the lower end stripe 24 and the upper end stripe 37 without backlash at the spacer 20 portion.
Further, between the lower upper upper muscle holding means 23 and the lower lower muscle holding means 2h, and between the upper upper upper muscle holding means 30c, 30c and the semicircular arc holding portion 32a of the upper lower muscle holding means 32. Since the same dimension L4 (= 12 mm) as the outer dimension of each reinforcing bar is set, it is unnecessary between the lower upper muscle 26 and the lower lower muscle 27 or between the upper upper muscle 35 and the upper lower muscle 36. These reinforcing bars 26, 27, 34, and 35 can be arranged satisfactorily without causing a large gap or conversely causing a shortage of arrangement dimensions, and the lower end lower muscle holding means 2h and the upper upper muscle holding means 30c. , 30c are formed in a flat plate shape, the lower reinforcing bar 24 and the upper reinforcing bar 37 are not exactly orthogonal to each other, or even when these reinforcing bars are added and used, the reinforcing bars are retained while allowing them.

As described above, after the lower end bars 24 and the upper end bars 37 are arranged in two stages using the spacer 20, the concrete 4 is poured into the mold, and the concrete 4 is placed in the second spacer at the position where each spacer 20 is installed. It fills up to 22 height display means 30d and 30d.
Thereby, the finished surface height of the concrete 4 is determined, and a predetermined fog is set between the lower end stripe 24 and the upper end stripe 37 and the upper surface of the concrete 4. The concrete 4 poured into the mold enters the seat plate 2a, the base 2g, and the through hole 3 and the extraction hole 33 of the back plate 2d, and firmly fixes the first and second spacers 21 and 22 at predetermined positions. To do. In addition, although not shown, a predetermined cover is also set between the lower end bars 24 and the upper end bars 37 and both side surfaces of the concrete 4.

  The spacer 20 of the present embodiment can hold the lower end stripe 24 and the upper end stripe 37 in two upper and lower stages to ensure a predetermined cover on the side surface of the concrete 4 and at the same time set the finished surface height of the concrete 4. . In addition, the setting of the finished surface height may be a simple operation in which the pouring height of the concrete 4 is flush with the height display means 30d, 30d when the concrete 4 is executed following the bar arrangement. Thus, conventional work such as measuring the finished surface height in advance at various locations in the mold and marking it on the mold is not required. In addition, since the first and second spacers 21 and 22 can be disassembled, only the first spacer 21 can be used alone when the reinforcing bars are in one stage, which is highly convenient.

It is a perspective view in the state where the reinforcing bar receiving spacer showing the first embodiment of the present invention holds the reinforcing bar. It is explanatory drawing which shows the reinforcement receiving spacer of the construction state which shows the 1st example of this invention. FIG. 3 showing the second embodiment of the present invention is an exploded perspective view of the first and second spacers for receiving reinforcing bars. It is a perspective view which shows the state which the 1st spacer and 2nd spacer which combined up and down which show the 2nd form example of this invention hold | maintain a reinforcing bar. FIG. 5 is a cross-sectional plan view of FIG. 4 showing a second embodiment of the present invention. It is a cross-sectional side view of FIG. 4 which shows the 2nd form example of this invention. It is explanatory drawing which shows the reinforcing bar receiving spacer of the construction state which shows the 2nd form example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Reinforcing bar receiving spacer 2a ... Seat plate 2b ... Base 2c ... Lower muscle holding means 2d ... Back plate 2e ... Arm piece 2f ... Height display means 2g ... Base 2h ... Lower lower muscle lower muscle holding means 2i ... Connecting means 4 ... Concrete 5 ... Upper bar holding means 6 ... Reinforcing bar holding means 7 ... Upper bar 8 ... Lower bar 9 ... Base surface 20 ... Rebar receiving spacer 21 ... First spacer 22 ... Second spacer 23 ... Lower bar upper bar upper bar holding means 23a ... Semicircular arc shaped holding portion 24 ... lower end muscle 25 composed of upper lower muscle 26 and lower lower muscle 27 ... lower muscle holding means 26 ... upper lower muscle 27 ... lower lower muscle 30a ... substrate 30b ... connection means 30c ... Upper upper muscle holding means 30d ... Height display means 32 ... Upper muscle lower muscle holding means 34 ... Upper muscle holding means 35 ... Upper upper muscle 36 ... Upper lower muscle 37 ... Upper upper muscle 35 and upper lower muscle 35 36. Upper end muscle 38 composed of 36 ... accommodating groove

Claims (4)

Reinforcing bar holding means for holding the upper and lower bars that are embedded in the reinforced concrete structure at a predetermined height in the mold,
A seat plate protruding to the side of the reinforcing bar holding means;
A height display means indicating the finished surface height of the reinforced concrete structure,
The reinforcing bar holding means is composed of a groove-like upper bar holding means provided in an opening in the height display means, and a flat plate lower bar holding means. 2. The reinforcing bar receiving spacer according to claim 1, wherein the upper bar holding means and the lower bar holding means are arranged with their phases shifted upward and downward by the outer dimension of the lower bar. It is a combination of a first spacer that holds the bottom reinforcement embedded in the lower side of the reinforced concrete structure and a second spacer that holds the upper reinforcement embedded in the upper side of the reinforced concrete structure,
The first spacer includes a lower-end muscle holding means that holds the lower-end muscle composed of an upper-lower muscle and a lower-lower muscle that intersects the upper-lower muscle, at a predetermined height in the mold,
A seat plate that protrudes to the side of the bottom reinforcement holding means, a height display means that indicates the finished surface height of the reinforced concrete structure when the bottom reinforcement is embedded in the reinforced concrete structure, and the second spacer is attached and detached. A connecting means that is freely connected,
The lower end muscle holding means is constituted by a lower end upper muscle holding means and a lower lower muscle holding means, and either one of the lower upper muscle holding means or the lower lower muscle holding means is set to a height of the first spacer. The groove is opened in the display means and the other is formed in a flat plate shape.
The second spacer includes upper end muscle holding means for holding the upper end muscle at a predetermined height in the mold frame, which is constituted by an upper upper muscle and an upper upper muscle that intersects the upper upper muscle;
A height display means for indicating the height of the finished surface of the reinforced concrete structure when the lower and upper reinforcing bars are embedded in the reinforced concrete structure, and a connecting means detachably connected to the first spacer,
The upper end muscle holding means is constituted by an upper upper muscle upper muscle holding means and an upper upper muscle lower muscle holding means, and either one of the upper upper muscle upper holding means or the upper lower muscle holding means is set to a height of the second spacer. The reinforcing bar receiving spacer is characterized in that it is formed in a groove shape opening in the display means and the other is formed in a flat plate shape. The lower muscle upper muscle holding means and the lower muscle lower muscle holding means of the lower muscle holding means are disposed by shifting the phase up and down by the outer dimension of the lower muscle lower muscle,
5. The upper upper muscle upper muscle holding means and the upper upper muscle lower muscle holding means of the upper muscle holding means are arranged by shifting the phase up and down by the outer dimension of the upper muscle lower muscle. Reinforcing bar receiving spacer described in 1.

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