JP2541931Y2 - Reinforced spacer - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing bar spacer for supporting a reinforcing bar at a predetermined distance from a reference surface such as the ground or the bottom of a formwork.

[0002]

2. Description of the Related Art For example, in order to manufacture a precast concrete slab in which a large number of reinforcing bars are buried, a method of arranging a reinforcing bar inside a form and then pouring concrete into the form is used. In order to arrange the reinforcing bars, it is necessary to place the reinforcing bars with a certain thickness from the bottom of the formwork. For this reason, concrete is placed on the bottom of the formwork and the reinforcing bars are placed on top of it. Reinforcement spacers are used in which the rebar is sandwiched by elasticity and supported on the bottom of the formwork.

The reinforcing bar spacer has a substantially rectangular parallelepiped shape as shown in Japanese Utility Model Laid-Open Publication No. 1-143824, and has long and short side surfaces provided with grooves for mounting reinforcing bars. There is a chamfered one, and
Japanese Patent Application Laid-Open No. 160026 discloses a structure in which irregularities for concrete penetration are formed in a portion other than the portion where the reinforcing bar is placed, and the reinforcing bar is fixed to the spacer body with a fixing bracket.

[0004]

[Problem to be Solved by the Invention] In the case of the former reinforcing bar spacer, the reinforcing bar is simply placed on the groove for mounting the reinforcing bar, and the reinforcing bar is not fixed to the reinforcing bar spacer. When the concrete is poured into the formwork using a vibrator, there is a concern that the position of the reinforcing bar with respect to the reinforcing bar spacer may be shifted due to vibration or flow pressure of the concrete. Further, when it is necessary to correct the arrangement position of the reinforcing bars, the reinforcing bar spacers and the reinforcing bars are separately moved, which is troublesome.

[0005] On the other hand, in the latter case, the spacer body and the reinforcing bar can be integrated with the fixing metal. Therefore, first, the reinforcing bar and the spacer main body can be fixed by the fixing metal, and then the reinforcing steel can be arranged in the mold. It is easy to correct the arrangement position of the reinforcing bars together with the reinforcing bar spacers.However, in order to fix the reinforcing bars, it is necessary to remove the fixing bracket once, that is, the spacer body and the fixing bracket are basically separate. Because it is a body, it is assumed that it is difficult to handle.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a reinforcing bar spacer which can stably support a reinforcing bar on a reference surface, and which can be easily handled. I have.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object, and has a reinforcing bar spacer for supporting a reinforcing bar at a predetermined distance from a reference surface such as the ground or the bottom surface of a formwork. A reinforcing bar fitting groove which is mounted on the reference surface and extends in parallel with the reference surface in the mounted state is formed, and extends along both sides of the groove along the longitudinal direction of the groove, and has a circular cross-sectional shape. A spacer body having an arcuate shoulder formed thereon, a base part elastically and detachably fitted to the shoulder part of the spacer body, and the reinforcing bar fitting in a state where the base part is fitted to the shoulder part. A hook portion, which is disposed on the groove, and to which the reinforcing bar is elastically and removably fitted, comprises a reinforcing bar support standing upright on the reinforcing bar fitting groove. In addition, in addition to this, the reinforcing bar support is formed by forming a cut forming the base portion and the hook portion on one metal plate having appropriate elasticity to form a base portion material and a hook portion material. The base portion and the hook portion are formed by appropriately bending the base portion material and the hook portion material, respectively.

[0008]

According to the reinforcing bar spacer of the present invention, the reinforcing bar is mounted on the spacer body, and the reinforcing bar is fitted to the hook of the reinforcing bar support to support the reinforcing bar. The reinforcing bar is fitted to the hook portion and integrated with the reinforcing bar spacer, so that the supporting state of the reinforcing bar is always stable.
In addition, since the rebar can be arranged with the rebar in a state where the rebar spacer is mounted, the rebar can be easily arranged or its position can be easily corrected. Also, the reinforcing bar substantially holds the reinforcing bar, and the reinforcing bar is mounted in a state where the reinforcing bar is mounted on the spacer body. Therefore, the setting of the reinforcing bar is not troublesome and the handling is easy.

Further, a base material and a hook material are formed by making a cut to form a base and a hook in a single metal plate having a suitable elasticity. If the base portion and the hook portion are formed by bending the material of the hook portion and the hook portion appropriately, the base portion and the hook portion can be integrally formed from a single metal plate, and the manufacturing is easy and the manufacturing cost is low. Will be completed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show a first embodiment of the present invention. In FIGS. 1 and 2, reference numeral 1 denotes the entire reinforcing bar spacer, and the reinforcing bar spacer 1 includes a spacer body 2 and a spacer body. It is generally constituted by a rebar support plate (rebar support tool) 3 which is detachably mounted.

The spacer body 2 is formed by molding a rectangular parallelepiped concrete. The upper end in FIGS. 1 and 2 has a plate mounting portion 4 on which the reinforcing bar support plate 3 is mounted, and the lower end has a bottom surface such as a bottom of a mold. Grounding part 5 grounded to reference plane S
It has become. The spacer body 2 has the same vertical cross-sectional shape everywhere, and both end faces are flat at right angles to the length direction. In addition, this dimensional ratio is the case of the present embodiment,
Design changes are made as appropriate.

At both ends in the width direction of the grounding portion 5, legs 6 whose outer cross-sections are arc-shaped ridges are formed, and at the center between them, an R-shaped outer cross-sectional arc smaller than the leg 6 is formed. Ridge 7
Are formed, and concave grooves 8 are formed between the legs 6 and the ridges 7 to smoothly connect the legs 6 and the ridges 7, respectively.
That is, unevenness is formed on the ground plane 9 with respect to the reference plane S, and when the spacer body 2 is placed on the reference plane S, the leg portions 6 and the ridges 7 are in line contact with the reference plane S.
The legs 6, the ridges 7, and the grooves 8 extend in parallel with the length direction of the spacer body 2.

On the other hand, the width of the plate mounting portion 4 is slightly narrower than that of the ground contact portion 5, and shoulder portions are formed at both ends in the width direction as convex portions having substantially the same R as the leg portions 6 and having an arc-shaped cross section. 1
0 are formed, and a rebar fitting groove 11 for smoothly connecting the shoulder portions 10 is formed between them. That is, the upper surface 12 of the spacer body 2 is also formed with irregularities. It is desirable that R of the reinforcing bar fitting groove 11 is slightly larger than the diameter of the reinforcing bar F to be supported. The shoulders 10 and the reinforcing bar fitting grooves 11 extend in parallel with the length direction of the spacer body 2. That is, the reinforcing bar fitting groove 11 extends parallel to the reference surface S in a state where the spacer main body 2 is placed on the reference surface S.

On both side surfaces 13 of the spacer body 2, there are formed aperture portions 14, which are concave grooves for smoothly connecting the leg portions 6 and the shoulder portions 10. The aperture portion 14 also extends in the length direction of the spacer body 2, and the most narrowed position, that is, the position where the width of the spacer body 2 is the narrowest is set slightly above the center in the height direction. .

On the other hand, as shown also in FIG. 3, the reinforcing bar support plate 3 elastically and removably fits to both shoulders 10 of the spacer body 2 and connects the fitting plates 15 to each other. It comprises a base portion 17 composed of a central connecting plate 16 and a hook portion 18 erected on the connecting plate 16 of the base portion 17 to which a reinforcing bar F is elastically and detachably fitted. For these, a metal plate having appropriate elasticity and high rust resistance, for example, a material obtained by quenching stainless steel at a predetermined temperature to improve the elasticity characteristics is used. In addition, a spring rope may be used if it is not particularly necessary to consider rust prevention.

The base portion 18 is symmetrical in that the fitting plates 15 are integrally provided on both sides thereof with a central flat connecting plate 16 interposed therebetween. It is set to about half of the length. Fitting plate 15
Is formed with a radius R slightly smaller than the radius of the shoulder portion 10 so as to follow the shoulder portion 10, and a short guide portion 19 that is bent outward is formed at the tip thereof. , Can be detachably fitted to the shoulder portion 10. The guide portion 19 is formed to allow the shoulder portion 10 to move smoothly when the fitting plate 15 is fitted to the shoulder portion 10. The guide portion 19 also contributes to the improvement of the rigidity of the fitting plate 15, and the guide portion 19
Thereby, the fitting plate 15 is hardly deformed. The connecting plate 16 is located below the upper end of the fitting plate 15 and is disposed on the reinforcing bar fitting groove 11 of the spacer body 2 in a state where the two fitting plates 15 are fitted to the shoulders 10, respectively, and The state becomes parallel to the width direction of the spacer body 2.

The hook portion 18 of the base portion 17 has a pair of holding plates 21 erected on both sides of a central flat connecting plate 20, and the length thereof is set slightly longer than that of the base portion 17. Have been. The holding plate 21 is configured such that, after the base end portion 22 with respect to the connection plate 20 is separated from each other and slightly spread outward, the base portion 22 is bent inward to approach each other to extend the intermediate portion 23, and the distal end of the intermediate portion 23 is separated from each other. The guide portion 24 is formed to extend outward. The guide portions 24 are formed at both ends of the holding plate 21 in the longitudinal direction, respectively.
Between them, an arc-shaped concave portion 25 is formed.

Beads 26 bulging inward are formed at both ends in the length direction of the holding plate 21 and below the guide portion 24, extending over the base end portion 22 and the intermediate portion 23. These beads 26 are formed by denting the holding plate 21.

The hook portion 18 is fixed to the connecting portion 16 of the base portion 17 by welding with the center of the connecting portion 20 in the longitudinal direction thereof being aligned with the connecting plate 20. The pair of holding plates 21 can be deformed in a direction away from or close to each other by elasticity, and in a normal state in which no force is applied, the portion between the pair of holding plates 21 is the narrowest portion. When the interval between the angles A and A formed by the intermediate portion 23 and the guide portion 24 is smaller than the diameter of the reinforcing bar F, and when the reinforcing bar F is sandwiched between the beads 26, the holding plate 21 spreads slightly and the elasticity of the reinforcing bar F increases due to its elasticity. Is firmly clamped. In order to fit the reinforcing bar F into the hook portion 18,
From the state where the reinforcing bar F is placed on the guide portion 24, the reinforcing bar F is pushed between the sandwiching plates 21 by relatively moving both sides closer to each other, whereby the sandwiching plate 21 is spread and the reinforcing bars F are held therebetween.

The reinforcing bar spacer 1 composed of the spacer body 2 and the reinforcing bar support plate 3 is configured such that both fitting plates 15 on the base portion 17 of the reinforcing bar supporting plate 3 are connected to the spacer main body 2.
And are fitted to both shoulders 10 of each.

According to the reinforcing bar spacers 1, a plurality of reinforcing bars 1 are mounted at appropriate intervals by fitting the reinforcing bars F to the hook portions 18 of the reinforcing bar support plate 3. The reinforcing bar F is supported on the reference plane S by contacting the ground plane 9 to the reference plane S at a predetermined position on the reference plane S, which is the bottom surface of the formwork or the like, with the ground 9 aligned. Also, with the reinforcing bar F supported in this way,
When arranging the reinforcing bars in a cross-shaped manner on the reinforcing bars, if the reinforcing bars are located in the concave portions 25 between the guide portions 24 in the holding plate 21, the reinforcing bars are positioned by the guide portions 24. . That is, when reinforcing bars are crossed and arranged, the reinforcing bar spacer 1 of the present embodiment can be effectively used in the cross portion.

According to the reinforcing bar spacer 1 of the present embodiment, the reinforcing bar F is firmly fitted to the hook portion 18 and is integrated with the reinforcing bar spacer 1, so that the supporting state of the reinforcing bar is always stable.
Therefore, even when pouring concrete using a vibrator, there is no possibility that the position of the reinforcing bar F is shifted due to vibration. In addition, the reinforcing bar F
Therefore, the reinforcing bars can be arranged in the formwork, so that the reinforcing bars can be easily arranged in the formwork or their positions can be easily corrected.

Further, the reinforcing bar F is substantially held by the reinforcing bar supporting plate 3, and the reinforcing bar F can be mounted with the reinforcing bar supporting plate 3 mounted on the spacer body 2. That is, it is easy to handle without the trouble that the reinforcing bar F cannot be attached unless the reinforcing bar supporting plate 3 is once removed from the spacer body 2.

In the rebar supporting plate 3, the pair of holding plates 21 of the hook portion 18 are pinched by hand in a direction of approaching each other so that the two fitting plates 15 act to open slightly upward. The rebar supporting plate 3 can be attached to the spacer body 2 without requiring so much force.
Or vice versa.

FIG. 4 shows a reinforcing bar spacer 1 according to the first embodiment.
The reinforcing bar spacer 30 is different from the reinforcing bar spacer 1 in the length of the base portion 17 and the hook portion 18 in the reinforcing bar support plate 3.
Is different from the reinforcing bar spacer 1 in that it is longer than the hook portion 18. According to the reinforcing bar spacer 30, when the spacer main body 2 is long, or when the reinforcing bar supporting plate 3 is attached to the spacer main body 2 more strongly, it is desired to make the mounting state stronger. This is effective in some cases.

FIGS. 5 to 7 show a second embodiment of the present invention. In these drawings, the same components as those in FIGS. 1 to 3 are denoted by the same reference numerals. In the reinforcing bar spacer 40 of the second embodiment, a reinforcing bar support plate 41 is mounted on the spacer body 2 instead of the reinforcing bar support plate 3 of the first embodiment.

FIG. 5 and FIG.
As shown in FIG. 7, hook portions 18 are integrally formed at both ends of the base portion 17, and both are formed from a single metal plate (such as stainless steel described above) and do not overlap in the vertical direction.

The method of manufacturing the reinforcing bar support plate 41 will be described in detail. First, as shown in FIG. 7, a rectangular metal plate 42, which is a material, is formed by punching or the like onto the base portion 17 and the hook portion. 18 and the cut 43 forming
To form a base material 17A and a hook material 18A. Next, after the bead 26 is formed, the base portion material 17A and the hook portion material 18A are appropriately bent to form the base portion 17 and the hook portion 18. In FIG. 7, reference numerals 17a, 15a, 16a, and 19a are assigned to the base portion 17 and portions corresponding to the fitting plate 15, the connecting plate 16, and the guide portion 19 of the base portion 17, respectively. Reference numerals 18 a, 20 a, 21 a, 22 a, and 18 correspond to the connection plate 20, the holding plate 21, and the base end portion 22, the intermediate portion 23, and the guide portion 24 of the holding plate 21, respectively. 23a and 24a are attached. The broken line in the figure indicates a bent line.

FIGS. 8 to 10 show a modification of the second embodiment. As shown in FIGS. 8 and 9, the reinforcing bar supporting plate 51 of the reinforcing bar spacer 50 has the same structure as the reinforcing bar spacer 40 shown in FIGS. The pattern opposite to that of the reinforcing bar support plate 41 is provided at both ends of the hook portion 18 at the base portion 17.
Are formed integrally with each other. Then, as shown in FIG. 10, the rebar support plate 51 is also formed with a cut 43 in a single metal plate 42 to form the base material 17A and the hook material 18A, respectively, as shown in FIG. These are bent appropriately to form the base portion 17 and the hook portion 18.

The reinforcing bar spacers 40, 5 of the second embodiment
According to No. 0, since the base portion 17 and the hook portion 18 can be formed integrally from one metal plate 42, there is an advantage that the manufacturing is easy and the manufacturing cost is low.

It should be noted that the above-mentioned first and second embodiments including the respective modifications are described.
In the embodiments, the shapes, dimensions, and the like are exactly the embodiments, and it goes without saying that these can be appropriately changed in design.

[0032]

As described above, according to the reinforcing bar spacer of the present invention, the reinforcing bar is fitted to the hook of the reinforcing bar support attached to the spacer body to support the reinforcing bar.
The reinforcing bar is fitted to the hook and integrated with the reinforcing bar spacer, so that the supporting state of the reinforcing bar is always stable, and the reinforcing bar can be arranged with the reinforcing bar mounted with the reinforcing bar spacer. It is possible to easily arrange the reinforcing bars or correct their positions. Also, the reinforcing bar substantially holds the reinforcing bar, and the reinforcing bar is mounted in a state where the reinforcing bar is mounted on the spacer body. Therefore, the setting of the reinforcing bar is not troublesome and the handling is easy. further,
A base material and a hook material are formed by making a cut forming a base portion and a hook portion on a single metal plate having appropriate elasticity. If the base portion and the hook portion are formed by bending appropriately, the base portion and the hook portion can be integrally formed from one metal plate, and therefore, the manufacturing is easy and the manufacturing cost can be reduced. .

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention.

FIG. 2 is a front view of the embodiment.

FIG. 3 is a plan view of the reinforcing bar support plate of the embodiment.

FIG. 4 is a perspective view showing a modification of the first embodiment.

FIG. 5 is a perspective view of a second embodiment.

FIG. 6 is a plan view of the rebar supporting plate of the embodiment.

FIG. 7 is a plan view of a metal plate as a raw material when manufacturing the reinforcing bar support plate of the embodiment.

FIG. 8 is a perspective view showing a modification of the second embodiment.

FIG. 9 is a plan view of a reinforcing bar support plate of the modification.

FIG. 10 is a plan view of a metal plate as a raw material when manufacturing the reinforcing bar support plate of the modification.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 30, 40, 50 Rebar spacer 2 Spacer main body 3 Rebar support plate (rebar support tool) 11 Rebar fitting groove 17 Base portion 17A Base portion material 18 Hook portion 18A Hook portion material 42 Metal plate F Rebar S Reference surface

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Takane Kato 2-6-21 Yaesu, Chuo-ku, Tokyo Rose Bay Yaesu Building Ishikawajima Building Materials Co., Ltd. (72) Hiroyuki Arai Yae, Chuo-ku, Tokyo 2-6-21, Okayama, Loose Bay Yaesu Building Ishikawajima Kensetsu Kogyo Co., Ltd. (72) Kunio Kobayashi 1040 Hoshiyama, Fujinomiya City, Shizuoka Prefecture 4 Kobayashi Kogyo Co., Ltd.

Claims (2)

(57) [Scope of request for utility model registration] 1. A reinforcing bar spacer for supporting a reinforcing bar at a predetermined distance from a reference surface such as the ground or the bottom surface of a formwork, wherein the reinforcing bar is mounted on the reference surface and extends in the mounted state in parallel with the reference surface. A spacer body having a fitting groove formed therein and extending along the length direction of the groove on both sides of the groove and having a shoulder having an arc-shaped cross-sectional shape; A base portion that fits removably and detachably, and a hook portion where the base portion is disposed on the rebar fitting groove in a state where the base portion is fitted to the shoulder portion, and the rebar is elastically and detachably fitted. A reinforcing-bar spacer, comprising: a reinforcing-bar support tool provided on a reinforcing-bar fitting groove. 2. The rebar supporting tool according to claim 1, wherein a cut forming the base portion and the hook portion is formed in one metal plate having appropriate elasticity to form a base portion material and a hook portion material. The reinforcing bar spacer according to claim 1, wherein the base portion and the hook portion are formed by appropriately bending the base portion material and the hook portion material.