JP2004052223A - Mounting device of spacer for reinforcing bar work - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the sorts of spacer by mounting the spacer to the inside of form panels through a supporting bar and, at the same time, to facilitate the mounting of the spacer. <P>SOLUTION: A plastic-made holder (23) formed in the shape of an inward contracted and truncated cone is provided to the inside of the form panels (21a and 21b), the metal supporting bar (24) is inward projected to the axial center section on the inside end of the holder (23) and is detachably provided, it is formed in a predetermined thickness of a mortar or a concrete, a block-shaped spacer (30) forming a locking hole (31) passing through in the direction of the thickness is provided, and the spacer (30) is fittingly locked to the supporting bar (24) through the locking hole (31) and, at the same time, it is abutted or approached to the holder (23). <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an apparatus for mounting a reinforcing-bar construction spacer that forms a cover gap between a reinforcing bar and a formwork.
[0002]
[Prior art]
Conventionally, it was as shown in FIG. In FIG. 14, reference numeral 1 denotes a reinforcing bar, which is formed by assembling a large number of vertical bars 2 and horizontal bars 3 at predetermined intervals in the vertical and horizontal directions. Reference numeral 5 denotes a formwork assembled outside the reinforcing bar 1, and the formwork panel 6 holds a predetermined covering gap S (S1 to S2) with respect to the outermost vertical streaks 2 and / or horizontal streaks 3. And assembled. The cover gap S is set to a predetermined value depending on the thickness of the reinforcing bar, the place of use, and the like.
[0003]
Reference numeral 10 denotes a mortar spacer which is attached to the outermost horizontal streak 3 (or the vertical streak 2) so as to hold the cover gap S of the mold 5 described above. That is, as shown in FIGS. 14 and 15, each of the first sides 10 a, the second sides 10 b, and the other three sides is formed in a flat octagonal shape in which the distance of each side from the axis is different. The second side 10c is recessed in an arc shape to form a contact side having three types of fogging gaps S1 to S3, and a fitting hole 11 extending from the side opposite to the first side 10a to the axial center is formed. A clip 12 made of a leaf spring is fitted into the inner deep portion of the fitting hole 11.
[0004]
When the cover gap S1 is held by the left mold 5a, for example, the cover 5 is fitted and locked to the left outer horizontal line 3 (or the vertical line 2) via the fitting hole 11 and the clip 12, and The first side 10a is directed toward the left mold 5a. Further, when the cover form S2 is held by the right mold 5b, the cover 5 is fitted and locked to the right outer horizontal streak 3 (or the vertical streak 2) via the fitting hole 11 and the clip 12, and The second side 10b is oriented in the direction of the right mold 5b.
[0005]
[Problems to be solved by the invention]
In the prior art, since the spacer 10 is attached to the reinforcing bar 1 side, there are many types of thickness of the reinforcing bar 1, so that it is necessary to prepare many types of the spacer 10. In addition, since the spacer 10 is attached to the reinforcing bars 1 attached vertically and horizontally, this attaching work requires time and effort. In particular, in order to achieve the specified number of the spacers 10 per area, for example, two per square meter, the spacing between the reinforcing bars 1 must be considered, and the spacing between the reinforcing bars 1 depends on the type of the structure and the thickness of the reinforcing bars. Because of the various differences depending on the conditions and the like, it takes time and effort to attach the spacer 10. In addition, since the plate-shaped spacer 10 is attached to the reinforcing bar 1 and the fogging gap S is obtained on the outer peripheral side, the diameter of the spacer 10 becomes large and heavy. SUMMARY OF THE INVENTION It is an object of the present invention to provide a new installation device for a spacer for reinforcing steel work, which solves the above-mentioned problems.
[0006]
[Means for Solving the Problems]
The present invention is configured as follows to achieve the above object. That is, the invention according to claim 1 provides a frusto-conical plastic holder formed on the inner surface of the form panel with a truncated conical shape, and a metal support rod on the inner end side axial center of the holder. And a block-shaped spacer formed of mortar or concrete to have a predetermined thickness and having a locking hole penetrating in the thickness direction is provided. It is configured such that it is fitted and locked to the support rod via a stop hole and is brought into contact with or close to the holder.
According to a second aspect of the present invention, the locking hole of the spacer is a hook-shaped slit that extends in the inner circumferential direction from the outer peripheral end of the spacer and then bends in the lateral direction. According to a third aspect of the present invention, a recess in which the holder is fitted is provided at one end in the thickness direction of the spacer. According to a fourth aspect of the present invention, a non-circular or rod-shaped resistor made of metal is crossed and fixed to the support rod.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, FIG. 1 is a sectional view showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 3 is a perspective view of a spacer, and FIG. FIGS. 5 and 5 are perspective views of a circular spacer, FIG. 6 is a side sectional view showing a second example of a support rod, FIG. 7 is a side sectional view showing a third example of a support rod, and FIG. FIG. 9 is a cross-sectional view showing a second embodiment of the present invention, FIG. 10 is a front view showing a second example of a rectangular spacer, and FIG. FIG. 12 is a front view showing a stopped state, FIG. 12 is a front view showing a second example of a circular spacer, and FIG. 13 is a front view showing a locked state of the circular spacer shown in FIG.
[0008]
In FIG. 1, reference numeral 15 denotes a reinforcing bar, which is formed by assembling a large number of vertical bars 16 and horizontal bars 17 at predetermined intervals in the same manner as described above. Reference numeral 20 (20a, 20b) denotes a formwork assembled outside the reinforcing bar 1, and the formwork panels 21a, 21b cover the outermost vertical streaks 16 and / or horizontal streaks 17 with spacers 30 by a predetermined covering. The gap S (S1 to S2) is held, and the left and right mold frames 20a and 20b are connected to each other by the separator 22 in this state.
[0009]
As shown in FIGS. 2 and 3, the spacer 30 is formed of a flat rectangular parallelepiped having a horizontal width W1 and a vertical width W2 of 50 to 70 mm and a thickness T1 of 10 to 50 by mortar or concrete. A locking hole 31 having a diameter D1 of 9 to 10.5 mm is formed so as to penetrate in the thickness direction. In this case, the locking hole 31 is displaced by about 3 mm in the direction of one predetermined corner portion with respect to the center point (center of gravity) by about 3 mm. Are directed downward so that bubbles, latencies, and the like are not generated below the spacer 30 when the mold frame 20 is filled with concrete.
[0010]
In this example, the thickness T of the spacer 30 is set to five types of 10 mm, 15 mm, 20 mm, 30 mm, and 50 mm, and the types of the width W1 and the length W2 and the type of the diameter D1 of the locking hole 31 will be described later. When the diameter of the support rod 24 is 7.5 mm or 9 mm, two types are used, that is, when the diameter of the support rod 24 is 7.5 mm, the horizontal width W1 and the vertical width W2 are both 50 mm, and the diameter D1 of the locking hole 31. Is 9 mm, and when the diameter of the support rod 24 is 9 mm, the horizontal width W1 and the vertical width W2 are both 70 mm, and the diameter D1 of the locking hole 31 is 10.5 mm. The width W1, the width W2, and the diameter D1 of the locking hole 31 may be one type corresponding to the diameter of the support rod 24 on the large diameter side.
[0011]
The spacer 30 is attached to the inner side of the mold 20 via the separator 22 attached to the mold 20 or the support 35. The separator 22 is attached at a location where the left and right molds 20a and 20b are firmly connected, for example, at four corners of each of the molds 20a and 20b. It has a frusto-conical plastic holder (plastic cone) 23 having a female screw at the side axis, and a connecting rod (supporting rod) 24 screw-connected to the female screw of the holder 23. The large diameter side is brought into contact with the inner surface side of each of the form panels 21a, 21b, and its male screw is projected outside of each of the form panels 21a, 21b. 26, and the connecting rod 24 is screwed into the female screw on the small diameter side of the left and right holders 23, thereby connecting the left and right mold frames 20a, 20b to each other.
[0012]
When attaching the spacer 30 to the separator 22, spacers 30a and 30b having a predetermined thickness are fitted to the left and right ends of the screw bar 26, and the spacers 30a and 30b are connected to the holders 23 and the outermost reinforcing bars 15 respectively. In this example, the screw bar 26 is interposed between the outermost longitudinal streaks 16, and in this state, one end of the screw rod 26, for example, the left end is screwed into the left holder 23, and then the right end of the screw rod 26 is The part holder 23 is screwed. In this case, when the fogging gap is insufficient with one spacer 30b, a predetermined fogging gap S2 is obtained by two spacers 30b and 30c as shown in the right part of FIG.
[0013]
4 and 5 show a second example of the spacer 30. In FIGS. 4 and 5, reference numeral 30-1 denotes a circular spacer having a circular outer periphery, and a locking hole 31- penetrating in the thickness direction at the center. One. The circular spacer 30-1 has an outer diameter D2 of 60 to 80 mm, an inner diameter D3 of the locking hole 31-1 of 9 to 10.5 mm, and a thickness T2 of 10 to 50 mm. In this example, the thickness T of the circular spacer 30-1 is five types of 10 mm, 15 mm, 20 mm, 30 mm, and 50 mm, and the types of the outer diameter D2 and the inner diameter D3 are 7.5 mm, 9 mm of the support rod 24. When the diameter of the support rod 24 is 7.5 mm, the outer diameter D2 is 60 mm and the inner diameter D3 is 9 mm. When the diameter of the support rod 24 is 9 mm, the outer diameter D2 is 80 mm, and the inner diameter D3 is 10.5 mm. The diameter D2 and the inside diameter D3 may be one kind corresponding to the diameter of the support rod 24 on the large diameter side.
[0014]
FIGS. 6 and 7 show a support for attaching the spacer 30 to the formwork 20 at a position away from the separator 22. That is, the support tool 35 shown in FIG. 6 forms a linear support bar 36 obtained by cutting a steel bar into a predetermined length, and a steel plate-shaped resistor 37 cut into a square shape is fitted to the left end of the support bar 36. A screw 36a is formed at the left end of a support bar 36 projecting leftward from the resistor 37, and a holder 45 screwed to the male screw 36a is provided. The resistor 37 is fixed to the concrete filled in the mold 20 to prevent the support rods 36 from rotating together when the holder 45 is separated from the hardened concrete. .
[0015]
7 cuts a steel bar into a predetermined length and bends a right end thereof into a hook shape to form an L-shaped support bar 41 serving as a resistor 42. A screw 41a is formed at the left end of the male screw 41a, a steel plate backing plate 43 cut into a square shape is screwed to the male screw 41a, and a holder 45 screwed to the male screw 41a is provided. The contact plate 43 is for adjusting the position of the spacer 30 in the inward and outward directions. The resistor 42 is for preventing the support rod 41 from rotating together when the holder 45 is released from the mold.
[0016]
The holder 45 has substantially the same structure as the holder 23 described above. As shown in FIGS. 6 and 7, a cone-shaped cone body 46 having a large diameter on the left portion and a small diameter on the right portion is made of plastic. A female screw 47a is formed on the right end of a steel bar 47 inserted into the shaft center of the cone body 46. The female screw 47a is engaged with the external threads 36a and 41a of the support rods 36 and 41. The left end of the gold 47 is projected leftward from the large diameter side of the cone main body 46, and a screw 47b is formed in this projected portion.
[0017]
As shown in FIG. 1, the support 35 (40) is attached to the form panel 21a at a predetermined position away from the separator 22. That is, a holding hole is formed at a predetermined portion of the mold panel 21a, the male screw 47b of the holder 45 is penetrated from the inside of the holding hole, and a nut 48 is screwed into an outer end of the male screw 47b to form the mold. It is fixed to the frame panel 21a. Then, a predetermined spacer 30d is fitted to the support rod 36, and the spacer 30 (30d) is interposed between the holder 45 and the outermost reinforcing bar 15 (vertical bar 16). The left end is screwed into the female screw 47a of the holder 45.
[0018]
FIG. 8 shows a spacer to be attached to the inclined formwork and its support. In FIG. 8, reference numeral 50 denotes a rectangular parallelepiped or columnar spacer, in which the left portion of the support rod 51 is inserted into the axial portion, and a cone-shaped concave portion 50a into which the holder 45 is fitted is formed in the left axial portion. I do. The left end of the support rod 51 projects into the concave portion 50a, and a screw 51a is formed in this portion. Further, a pin-shaped resistor 52 is crossed to the left part of the support rod 51 and fixed by welding. The resistor 52 is also inserted into the spacer 50 to prevent the support rod 51 from rotating together when the holder 45 is released.
[0019]
The spacer 50 is attached to the inclined formwork 20-1 as shown in FIG. That is, the same holder 45 as described above is fitted into the concave portion 50a of the spacer 5 to make the spacer 50 and the holder 45 into a unit. 15-1, the male screw 47b of the holder 45 is passed through a holding hole formed at a predetermined position of the mold 20-1 from above, and the lower end of the male screw 47b is inserted into the mold 20-. 1, and a nut 48 is screwed into this portion to be fixed to the mold 20-1. In this case, if necessary, a plate-shaped auxiliary spacer 53 is fitted and locked on the support rod 51 and overlaps the upper surface of the spacer 50 to obtain a predetermined fogging gap S.
[0020]
10 to 11 show a second example of the rectangular spacer. In this example, a rectangular parallelepiped rectangular spacer 55 is formed, and a locking hole 56 formed in the rectangular spacer 55 is extended from a predetermined side 55a in the inner circumferential direction. At the same time, the position of the inner end 56a of the locking hole 56 is deviated from the center point of the rectangular spacer 55 in the direction of one adjacent side 55b. As a result, as shown in FIG. 11, when the support rod 24 (36, 41) is fitted and locked, the predetermined corner 55c is directed downward by its own weight, and the square spacer to the support rod 24 is formed. This facilitates the mounting of the spacer 55 and prevents the attached square spacer 55 from being accidentally dropped from the support rod 24.
[0021]
12 and 13 show a second example of the circular spacer. This device forms a flat columnar circular spacer 57, and after a locking hole 58 formed in the circular spacer 57 extends from a predetermined outer end in the inner circumferential direction, a hook-shaped bent sideways. In addition to the slit, the position of the inner end 58a of the locking hole 58 is shifted laterally (leftward) from the center point of the circular spacer 57. This facilitates the attachment of the circular spacer 57 to the support rod 24 (36, 41) as shown in FIG. 13, and prevents the attached circular spacer 57 from accidentally falling off the support rod 24. It is intended to be.
[0022]
【The invention's effect】
As is apparent from the above description, in the invention according to the present application, the spacer formed to a predetermined thickness by mortar or concrete is attached to the inner surface of the form panel via the support rod, so that the spacer It can be installed without being affected by the type, pitch, etc. For this reason, the number of types of spacers can be reduced, and mounting of the spacers becomes easy. Moreover, even if the number of spacers per area of the spacer is specified, this can be easily observed.
In addition, since the outer end of the spacer is brought into contact with or close to the plastic holder detached after molding of the concrete, the thickness of the spacer is added by the holder, and the spacer is reduced in size and weight. can do.
Also, since the locking hole of the spacer extends in the inner circumferential direction from the outer peripheral end of the spacer, and is formed as a hook-shaped slit that bends in the lateral direction, the spacer can be attached to the support rod from the radial direction. The spacer can be easily attached, and an unintentional drop after the attachment can be prevented.
Further, since the concave portion into which the holder is fitted is provided at one end in the thickness direction of the spacer, the spacer can be firmly attached to the inclined formwork.
In addition, since the non-circular or bar-shaped resistor made of metal is fixed at the end of the support bar on the holder side, the support bar does not rotate together when the holder is released, and the release of the holder proceeds smoothly. Will be
[Brief description of the drawings]
FIG. 1 is a sectional view showing a first embodiment of the present invention.
FIG. 2 is a sectional view taken along line II-II of FIG.
FIG. 3 is a perspective view of a spacer.
FIG. 4 is a sectional view corresponding to FIG. 2 showing a circular spacer.
FIG. 5 is a perspective view of a circular spacer.
FIG. 6 is a side sectional view showing a second example of the support rod.
FIG. 7 is a side sectional view showing a third example of a support rod.
FIG. 8 is a sectional view showing a spacer having a fitting concave portion of the holder and an assembled state of the spacer.
FIG. 9 is a sectional view showing a second embodiment of the present invention.
FIG. 10 is a front view showing a second example of the rectangular spacer.
FIG. 11 is a front view showing a locked state of the rectangular spacer according to FIG. 10;
FIG. 12 is a front view showing a second example of the circular spacer.
FIG. 13 is a front view showing a locked state of the circular spacer according to FIG. 12;
FIG. 14 is a sectional view showing a conventional example.
FIG. 15 is a perspective view showing a conventional spacer.
[Explanation of symbols]
15 Reinforcing bar 16 Vertical bar 17 Horizontal bar 20 (20a, 20b) Form 20-1 Inclined form 21a, 21b Form panel 22 Separator 23 Holder (plastic cone)
24 Connecting rod (supporting rod)
25 Frame 26 Screw rod 30 Spacer 31 Lock hole 30-1 Circular spacer 31-1 Lock hole 35, 40 Support tool 36, 41 Support rod 36a, 41a Male screw 37, 42 Resistor 43 Backing plate 45 Holder 46 Mainly cone 47 core metal 47a female screw 47b male screw 48 nut 50 spacer 50a recess 51 support rod 51a male screw 52 resistor 53 auxiliary spacer 55 square spacer 55a, 55b side 56 locking hole (slit)
56a Inner end 57 Circular spacer 58 Lock hole (slit)
58a Inner end

Claims (4)

A plastic holder (23) formed in the shape of a truncated cone whose inner side is reduced is provided on the inner surface of the form panel (21a, 21b), and a metal support is provided on the inner end side axial portion of the holder (23). A bar (24) protruding inward and detachably provided, formed of mortar or concrete to a predetermined thickness, and formed with a block-like spacer (31) formed with a locking hole (31) penetrating in the thickness direction. 30), the spacer (30) is fitted and locked to the support rod (24) through the locking hole (31), and is brought into contact with or close to the holder (23). Mounting device for spacers for rebar construction. The locking holes (56, 58) of the spacers (55, 57) are hook-shaped slits that extend inward from the outer peripheral ends of the spacers (55, 57) and then bend laterally. The mounting device for a reinforcing work spacer according to claim 1, wherein: The mounting device for a reinforcing steel work spacer according to claim 1 or 2, wherein a recess (50a) into which the holder (45) is fitted is provided at one end in the thickness direction of the spacer (50). The rebar work according to claim 1, 2, or 3, wherein a non-circular or bar-shaped resistor (37, 42, 52) made of metal is fixed to the support rod (36, 41, 51). Mounting device for spacers.

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